/* roulang page: index */
:root{
    --bg-base:#0B1220;
    --bg-elevated:#111C2E;
    --bg-sidebar:#0F172A;
    --glass-bg:rgba(255,255,255,.06);
    --glass-bg-hover:rgba(255,255,255,.12);
    --glass-border:rgba(255,255,255,.12);
    --glass-border-light:rgba(255,255,255,.22);
    --text-primary:#F1F5F9;
    --text-secondary:#94A3B8;
    --text-muted:#64748B;
    --brand-primary:#2563EB;
    --brand-primary-deep:#1D4ED8;
    --brand-accent:#38BDF8;
    --success-accent:#2DD4BF;
    --warning:#F59E0B;
    --danger:#F43F5E;
    --link:#7DD3FC;
    --link-visited:#5B8FB8;
    --radius-card:16px;
    --radius-btn:12px;
    --radius-tag:999px;
    --radius-input:14px;
    --shadow-card:0 4px 16px rgba(0,0,0,.18);
    --shadow-float:0 8px 24px rgba(0,0,0,.26);
    --shadow-glow:0 0 20px rgba(37,99,235,.45);
    --font-sans:"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
    --font-num:Inter,"Segoe UI",Roboto,"PingFang SC",sans-serif;
    --space-section:80px;
    --space-section-mid:48px;
    --content-max:1280px;
    --sidebar-width:260px;
    --mobile-header-height:64px;
    --ease:all .25s ease;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
    font-family:var(--font-sans);
    background:var(--bg-base);
    color:var(--text-primary);
    line-height:1.75;
    font-size:16px;
    min-height:100vh;
    overflow-x:hidden;
}
body.nav-open{overflow:hidden}
a{color:var(--link);text-decoration:none;transition:var(--ease)}
a:visited{color:var(--link-visited)}
a:hover{color:var(--brand-accent)}
a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{outline:3px solid rgba(56,189,248,.55);outline-offset:2px;border-radius:4px}
img{display:block;max-width:100%}
button{font-family:inherit;font-size:inherit;background:none;border:none;cursor:pointer;color:inherit}
ul,ol{list-style-position:inside}
::-webkit-scrollbar{width:9px;height:9px}
::-webkit-scrollbar-track{background:#0e1626}
::-webkit-scrollbar-thumb{background:#243349;border-radius:999px}
::-webkit-scrollbar-thumb:hover{background:#32465f}

.layout{min-height:100vh;display:flex}
.sidebar{
    position:fixed;inset:0 auto 0 0;width:var(--sidebar-width);
    background:var(--bg-sidebar);
    border-right:1px solid #1E293B;
    display:flex;flex-direction:column;z-index:120;
    transition:transform .32s cubic-bezier(.22,.68,.36,.99);
    overflow-y:auto;overflow-x:hidden;
}
.sidebar::-webkit-scrollbar{width:4px}
.brand-zone{
    display:flex;align-items:center;gap:12px;padding:24px 20px 18px;
    border-bottom:1px solid rgba(255,255,255,.06);
}
.brand-mark{
    width:44px;height:44px;flex-shrink:0;position:relative;border-radius:12px;
    background:linear-gradient(140deg,#2563EB 15%,#38BDF8 90%);
    box-shadow:var(--shadow-glow);display:flex;align-items:center;justify-content:center;
}
.brand-mark i{display:block;width:9px;height:9px;border-radius:50%;background:#fff;position:relative;box-shadow:0 0 14px #fff}
.brand-mark i::after{content:"";position:absolute;inset:-9px;border:1px solid rgba(255,255,255,.55);border-radius:50%;animation:ping 2.2s ease infinite}
@keyframes ping{0%{transform:scale(.65);opacity:.9}75%{transform:scale(1.45);opacity:0}100%{opacity:0}}
.brand-text{min-width:0}
.brand-name{
    font-size:15px;font-weight:700;color:#fff;letter-spacing:.3px;line-height:1.35;
    word-break:break-all;
    display:block;
}
.brand-sub{display:block;font-size:11px;color:var(--text-muted);margin-top:3px;letter-spacing:.2px;line-height:1.4}
.sidebar-nav{flex:1;padding:16px 12px}
.nav-caption{
    font-size:12px;color:var(--text-muted);text-transform:uppercase;letter-spacing:1px;
    margin:8px 12px 10px;display:flex;align-items:center;gap:8px;
}
.nav-caption::after{content:"";flex:1;height:1px;background:rgba(255,255,255,.07)}
.nav-list{display:flex;flex-direction:column;gap:4px;list-style:none}
.nav-item{list-style:none}
.nav-link{
    display:flex;align-items:center;gap:13px;padding:11px 16px;
    color:var(--text-secondary);border-radius:12px;font-size:15px;font-weight:500;
    position:relative;transition:var(--ease);line-height:1.4;
    width:100%;
}
.nav-link svg{width:20px;height:20px;flex-shrink:0;stroke:var(--text-muted);transition:all .25s ease}
.nav-link:hover{background:rgba(255,255,255,.05);color:#fff}
.nav-link:hover svg{stroke:var(--brand-accent)}
.nav-link.active{
    color:#fff;background:rgba(37,99,235,.14);
    box-shadow:inset 0 0 0 1px rgba(37,99,235,.25);font-weight:600;
}
.nav-link.active::before{
    content:"";position:absolute;left:0;top:13px;bottom:13px;width:3px;
    border-radius:0 3px 3px 0;background:var(--brand-accent);
    box-shadow:0 0 16px rgba(56,189,248,.85);
}
.nav-link.active svg{stroke:var(--brand-accent)}
.sidebar-footer{
    padding:16px 18px 14px;border-top:1px solid rgba(255,255,255,.06);
    background:rgba(255,255,255,.015);
}
.sidebar-service{
    font-size:13px;color:var(--text-muted);line-height:1.75;
    background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.06);
    border-radius:14px;padding:12px 14px;
}
.sidebar-service strong{display:block;color:var(--text-secondary);font-weight:600;font-size:13px;margin-bottom:4px}
.sidebar-service span{font-size:12px}

.main-wrap{width:calc(100% - 260px);margin-left:260px;min-height:100vh;display:flex;flex-direction:column}
.mobile-header{
    display:none;position:sticky;top:0;z-index:110;
    height:var(--mobile-header-height);
    background:rgba(11,18,32,.88);backdrop-filter:blur(18px);
    align-items:center;justify-content:space-between;
    padding:0 20px;border-bottom:1px solid rgba(255,255,255,.08);
}
.mobile-brand{display:flex;align-items:center;gap:11px;font-size:15px;font-weight:700;color:#fff}
.mobile-brand-mark{width:32px;height:32px;background:linear-gradient(140deg,#2563EB,#38BDF8);border-radius:8px;display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow-glow);flex-shrink:0}
.mobile-brand-mark i{width:7px;height:7px;border-radius:50%;background:#fff;box-shadow:0 0 10px #fff}
.burger{width:44px;height:44px;border-radius:10px;display:flex;align-items:center;justify-content:center;position:relative;background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.08)}
.burger span{display:block;width:20px;height:2px;background:#E2E8F0;position:relative;transition:var(--ease)}
.burger span::before,.burger span::after{content:"";position:absolute;left:0;width:20px;height:2px;background:#E2E8F0;transition:var(--ease)}
.burger span::before{top:-6px}
.burger span::after{top:6px}
body.nav-open .burger span{background:transparent}
body.nav-open .burger span::before{transform:rotate(45deg);top:0}
body.nav-open .burger span::after{transform:rotate(-45deg);top:0}
.nav-draw-mask{
    position:fixed;inset:0;background:rgba(4,8,16,.7);z-index:115;
    opacity:0;visibility:hidden;transition:opacity .3s ease,visibility .3s ease;
}
body.nav-open .nav-draw-mask{opacity:1;visibility:visible}

.content{flex:1;width:100%;max-width:var(--content-max);margin:0 auto;padding:0 32px}
.top-notice{
    display:flex;align-items:center;gap:12px;
    background:rgba(37,99,235,.13);
    border:1px solid rgba(56,189,248,.22);
    border-radius:15px;padding:10px 18px;margin-top:22px;
    font-size:14px;color:#C7DBF5;
    box-shadow:0 0 22px rgba(37,99,235,.08);
}
.top-notice .dot{width:7px;height:7px;border-radius:50%;background:#2DD4BF;box-shadow:0 0 10px #2DD4BF;flex-shrink:0}
.top-notice p{flex:1;min-width:0;line-height:1.6}
.top-notice .notice-close{
    width:26px;height:26px;border-radius:50%;background:rgba(255,255,255,.08);
    display:flex;align-items:center;justify-content:center;flex-shrink:0;
    color:#CBD5E1;font-size:14px;line-height:1;
    transition:var(--ease);
}
.top-notice .notice-close:hover{background:rgba(255,255,255,.16);color:#fff}

.hero{
    position:relative;min-height:620px;display:flex;align-items:center;
    margin-top:22px;border-radius:24px;overflow:hidden;
    background:
        linear-gradient(105deg,rgba(7,13,27,.95) 8%,rgba(18,33,61,.82) 52%,rgba(7,13,27,.9) 100%),
        url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
    border:1px solid rgba(255,255,255,.1);
    box-shadow:0 22px 60px rgba(0,0,0,.38);
}
.hero::before{content:"";position:absolute;top:-120px;right:-80px;width:420px;height:420px;background:radial-gradient(circle,rgba(56,189,248,.28),transparent 65%);pointer-events:none}
.hero::after{content:"";position:absolute;bottom:-80px;left:20%;width:260px;height:260px;background:radial-gradient(circle,rgba(45,212,191,.14),transparent 70%);pointer-events:none}
.hero-inner{
    position:relative;z-index:2;width:100%;
    display:grid;grid-template-columns:minmax(0,7fr) minmax(300px,5fr);
    align-items:center;gap:16px;padding:30px;
}
.hero-copy{max-width:720px}
.hero-badge{
    display:inline-flex;align-items:center;gap:8px;background:rgba(255,255,255,.08);
    border:1px solid rgba(255,255,255,.17);backdrop-filter:blur(10px);
    padding:6px 14px;border-radius:999px;color:#A5C9FF;font-size:13px;margin-bottom:20px;
}
.hero-badge .pulse-dot{width:8px;height:8px;background:#2DD4BF;border-radius:50%;box-shadow:0 0 12px #2DD4BF}
.hero h1{
    font-size:42px;line-height:1.22;font-weight:700;color:#fff;letter-spacing:.2px;
    margin-bottom:18px;
}
.hero h1 .grad{
    background:linear-gradient(98deg,#7DD3FC 0%,#38BDF8 48%,#2DD4BF 100%);
    -webkit-background-clip:text;background-clip:text;
    -webkit-text-fill-color:transparent;color:transparent;
}
.hero-desc{font-size:17px;color:#C6D3E5;line-height:1.9;max-width:620px;margin-bottom:22px}
.hero-tags{display:flex;flex-wrap:wrap;gap:9px;margin-bottom:28px}
.hero-tag{
    display:inline-flex;align-items:center;gap:6px;font-size:13px;color:#C7D2E3;
    background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.1);
    padding:6px 13px;border-radius:999px;transition:var(--ease);
}
.hero-tag svg{width:14px;height:14px;stroke:#7DD3FC}
.hero-tag:hover{background:rgba(255,255,255,.12);color:#fff}
.hero-btns{display:flex;flex-wrap:wrap;gap:14px}
.btn{
    display:inline-flex;align-items:center;justify-content:center;gap:9px;
    border-radius:var(--radius-btn);font-size:16px;font-weight:600;
    padding:14px 30px;min-height:48px;transition:var(--ease);
    position:relative;border:1px solid transparent;
}
.btn svg{width:18px;height:18px;transition:transform .25s ease}
.btn:hover svg{transform:translateX(4px)}
.btn-primary{
    color:#fff;background:linear-gradient(135deg,#2563EB,#1D4ED8);
    box-shadow:0 4px 14px rgba(37,99,235,.3);
}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 0 24px rgba(37,99,235,.55);background:linear-gradient(135deg,#2E6BF0,#1E4FD8);color:#fff}
.btn-primary:active{transform:translateY(0) scale(.98);box-shadow:0 0 12px rgba(37,99,235,.4)}
.btn-stroke{
    color:#EAF2FF;background:rgba(255,255,255,.06);border-color:rgba(255,255,255,.22);
    backdrop-filter:blur(8px);
}
.btn-stroke:hover{background:rgba(255,255,255,.14);border-color:rgba(255,255,255,.36);color:#fff;transform:translateY(-1px)}
.btn-stroke:active{transform:translateY(0) scale(.98)}
.btn-sm{font-size:14px;padding:9px 18px;min-height:44px;border-radius:10px}
.btn-full{width:100%}
.hero-visual{display:flex;align-items:center;justify-content:center;min-height:430px;position:relative}
.portal{position:relative;width:300px;height:300px;display:flex;align-items:center;justify-content:center}
.portal::before,.portal::after{
    content:"";position:absolute;inset:0;border-radius:50%;
    border:1px solid rgba(56,189,248,.32);pointer-events:none;
}
.portal::after{inset:30px;border-color:rgba(125,211,252,.22);animation:portal-spin 17s linear infinite}
.portal-core{
    position:relative;width:132px;height:132px;border-radius:50%;
    background:linear-gradient(145deg,rgba(37,99,235,.55),rgba(56,189,248,.15));
    border:1px solid rgba(125,211,252,.45);
    backdrop-filter:blur(8px);
    display:flex;align-items:center;justify-content:center;
    box-shadow:0 0 40px rgba(56,189,248,.4),inset 0 0 32px rgba(56,189,248,.16);
}
.portal-core i{width:16px;height:16px;border-radius:50%;background:#fff;box-shadow:0 0 20px #fff,0 0 40px rgba(56,189,248,.8)}
.portal-orbit{position:absolute;inset:52px;transform:rotate(45deg)}
.portal-orbit span{
    position:absolute;width:8px;height:8px;border-radius:50%;background:#38BDF8;
    box-shadow:0 0 14px rgba(56,189,248,.9);animation:orbit-move 6s ease-in-out infinite;
}
.portal-orbit span:nth-child(1){top:-4px;left:calc(50% - 4px)}
.portal-orbit span:nth-child(2){bottom:-4px;left:calc(50% - 4px);background:#2DD4BF;box-shadow:0 0 16px rgba(45,212,191,.85);animation-delay:3s}
@keyframes portal-spin{from{transform:rotate(0)}to{transform:rotate(360deg)}}
@keyframes orbit-move{0%,100%{opacity:.8;transform:scale(1)}50%{opacity:.3;transform:scale(.6)}}

.icon-card{width:62px;height:62px;border-radius:15px;background:rgba(37,99,235,.18);border:1px solid rgba(56,189,248,.22);display:flex;align-items:center;justify-content:center}
.icon-card svg{width:28px;height:28px;stroke:#7DD3FC}

.section{position:relative;padding:var(--space-section) 0}
.section-sm{padding:var(--space-section-mid) 0}
.section-lab{
    font-size:14px;color:#38BDF8;
    background:rgba(56,189,248,.12);border:1px solid rgba(56,189,248,.2);
    display:inline-flex;align-items:center;gap:8px;
    padding:5px 15px;border-radius:999px;margin-bottom:14px;
    letter-spacing:.3px;font-weight:500;
}
.section-title{
    font-size:32px;line-height:1.3;font-weight:700;color:#fff;position:relative;
    padding-left:26px;margin-bottom:15px;
}
.section-title::before{
    content:"";position:absolute;left:0;top:7px;bottom:5px;width:4px;border-radius:4px;
    background:var(--brand-accent);box-shadow:0 0 16px rgba(56,189,248,.7);
}
.section-sub{color:var(--text-secondary);font-size:16px;max-width:680px;line-height:1.8}
.section-head-row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:36px;flex-wrap:wrap}
.section-head-row .section-sub{margin-bottom:6px}
@media(min-width:1024px){.hero h1{font-size:44px}} 
.section-link{
    font-size:15px;color:var(--text-secondary);display:inline-flex;align-items:center;gap:6px;
    padding-bottom:4px;border-bottom:1px solid rgba(255,255,255,.18);flex-shrink:0;
    transition:var(--ease);
}
.section-link svg{width:16px;height:16px;transition:transform .25s ease}
.section-link:hover{color:var(--brand-accent);border-color:rgba(56,189,248,.45)}
.section-link:hover svg{transform:translateX(5px)}

.spotlight-grid{display:grid;grid-template-columns:minmax(0,1.45fr) minmax(0,1fr);gap:24px;margin-bottom:26px}
.spot-main{
    min-height:360px;border-radius:var(--radius-card);overflow:hidden;position:relative;
    border:1px solid rgba(255,255,255,.12);
    background:
        linear-gradient(145deg,rgba(17,28,46,.94),rgba(13,24,41,.82)),
        url('/assets/images/coverpic/cover-1.webp') center/cover no-repeat;
    box-shadow:var(--shadow-card);padding:30px;display:flex;align-items:flex-end;
}
.spot-main::before{content:"";position:absolute;inset:0;background:linear-gradient(0deg,rgba(6,12,24,.82) 28%,rgba(6,12,24,.1));pointer-events:none}
.spot-main-content{position:relative;z-index:2;max-width:94%}
.spot-main .eyebrow{font-size:13px;color:#38BDF8;letter-spacing:1px;font-weight:600;margin-bottom:9px;display:block}
.spot-main h3{font-size:24px;line-height:1.45;font-weight:700;color:#fff;margin-bottom:11px}
.spot-main p{font-size:15px;color:#C7D4E5;line-height:1.85;margin-bottom:14px}
.link-arrow{font-size:14px;font-weight:600;color:#7DD3FC;display:inline-flex;align-items:center;gap:6px}
.link-arrow svg{width:15px;height:15px;transition:transform .25s ease}
.link-arrow:hover svg{transform:translateX(4px)}
.spot-cards{display:flex;flex-direction:column;gap:14px}
.spot-card{
    flex:1;display:flex;align-items:center;gap:16px;
    background:rgba(255,255,255,.05);border:1px solid var(--glass-border);
    border-radius:18px;padding:18px 17px;min-height:82px;transition:var(--ease);
    text-align:left;color:var(--text-primary);width:100%;
    backdrop-filter:blur(8px);
}
.spot-card .icon-card{width:52px;height:52px;flex-shrink:0;border-radius:13px}
.spot-card .icon-card svg{width:24px;height:24px}
.spot-card:hover{background:rgba(255,255,255,.1);border-color:rgba(125,211,252,.3);transform:translateY(-2px)}
.spot-card-copy{min-width:0}
.spot-card-copy strong{display:block;font-size:17px;color:#fff;font-weight:700}
.spot-card-copy span{display:block;font-size:13px;color:var(--text-secondary);line-height:1.5;margin-top:2px}

.platform-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:24px}
.mode-card{
    background:linear-gradient(145deg,rgba(255,255,255,.07),rgba(255,255,255,.025));
    border:1px solid var(--glass-border);border-radius:20px;
    padding:26px;position:relative;overflow:hidden;transition:var(--ease);min-height:250px;
    backdrop-filter:blur(12px);box-shadow:0 10px 24px rgba(0,0,0,.2);
    display:flex;flex-direction:column;
}
.mode-card:hover{border-color:rgba(125,211,252,.4);transform:translateY(-6px);background:linear-gradient(145deg,rgba(255,255,255,.1),rgba(255,255,255,.04));box-shadow:0 20px 40px rgba(0,0,0,.32)}
.mode-card .glowline{position:absolute;top:0;left:0;right:0;height:2px;background:linear-gradient(90deg,transparent,rgba(56,189,248,.65),transparent);opacity:0;transition:var(--ease)}
.mode-card:hover .glowline{opacity:1}
.mode-card.half{grid-column:span 6}
.mode-card.third{grid-column:span 4}
.mode-card .mode-icon{width:52px;height:52px;border-radius:14px;background:rgba(37,99,235,.14);border:1px solid rgba(56,189,248,.2);display:flex;align-items:center;justify-content:center;margin-bottom:17px}
.mode-icon svg{width:27px;height:27px;stroke:#7DD3FC}
.mode-card h3{font-size:19px;font-weight:700;color:#fff;margin-bottom:10px}
.mode-card p{font-size:14px;color:var(--text-secondary);line-height:1.75;font-weight:400}
.mode-foot{margin-top:auto;padding-top:14px;font-size:13px;color:var(--text-muted)}
.mode-card .mode-thumb{
    border-radius:14px;margin-bottom:18px;object-fit:cover;width:100%;height:154px;
    background:#1b283e;
}

.news-panel{
    background:linear-gradient(145deg,rgba(255,255,255,.045),rgba(255,255,255,.02));
    border:1px solid var(--glass-border);
    border-radius:24px;padding:22px;
    backdrop-filter:blur(10px);
}
.news-list{display:flex;flex-direction:column;gap:10px}
.news-item{
    display:grid;grid-template-columns:118px minmax(0,1fr) auto;gap:22px;
    align-items:center;background:rgba(255,255,255,.03);
    border:1px solid transparent;border-radius:16px;padding:14px 14px;
    transition:var(--ease);color:var(--text-primary);min-height:90px;
}
.news-item:hover{background:rgba(255,255,255,.07);border-color:var(--glass-border-light);text-decoration:none;transform:translateY(-2px);box-shadow:0 8px 20px rgba(0,0,0,.25)}
.news-thumb{width:118px;height:78px;border-radius:11px;background:linear-gradient(140deg,rgba(37,99,235,.22),rgba(56,189,248,.08));border:1px solid rgba(255,255,255,.1);display:flex;align-items:center;justify-content:center;overflow:hidden}
.news-thumb img{width:100%;height:100%;object-fit:cover}
.news-thumb svg{width:33px;height:33px;stroke:rgba(125,211,252,.55)}
.news-main{min-width:0}
.news-title{font-size:17px;font-weight:700;color:#F1F5F9;line-height:1.5;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;margin-bottom:3px}
.news-desc{font-size:14px;color:var(--text-secondary);line-height:1.7;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-meta{display:flex;flex-direction:column;align-items:flex-end;gap:9px;padding-left:4px;flex-shrink:0}
.news-cat{
    font-size:12px;background:rgba(56,189,248,.16);border:1px solid rgba(56,189,248,.28);
    color:#B9E3FF;padding:4px 12px;border-radius:999px;font-weight:500;white-space:nowrap;
}
.news-date{font-size:13px;color:var(--text-muted);font-family:var(--font-num);white-space:nowrap}
.news-arrow{width:30px;height:30px;border-radius:50%;display:flex;align-items:center;justify-content:center;background:rgba(255,255,255,.06);margin-top:3px;opacity:.65;transition:var(--ease)}
.news-item:hover .news-arrow{opacity:1;background:rgba(37,99,235,.6);transform:translateX(3px)}
.news-arrow svg{width:16px;height:16px;stroke:#fff}
.news-empty{
    text-align:center;padding:60px 20px;color:var(--text-muted);
    border:1px dashed rgba(255,255,255,.12);border-radius:16px;background:rgba(255,255,255,.015);
    font-size:15px;
}
.news-empty svg{width:38px;height:37px;stroke:#64748B;margin:0 auto 12px;display:block;opacity:.7}

.about-zone{
    position:relative;overflow:hidden;border:1px solid var(--glass-border);border-radius:24px;
    min-height:470px;display:flex;align-items:center;
    background:linear-gradient(103deg,rgba(11,20,40,.97) 30%,rgba(15,32,62,.85) 65%,rgba(12,23,44,.92)),url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
    padding:34px;
}
.about-grid{display:grid;grid-template-columns:minmax(0,1.3fr) minmax(0,.9fr);gap:46px;width:100%;position:relative;z-index:2;align-items:start}
.about-copy h2{font-size:30px;line-height:1.4;font-weight:700;color:#fff;margin-bottom:16px;position:relative;padding-left:22px}
.about-copy h2::before{content:"";position:absolute;left:0;top:6px;bottom:4px;width:4px;background:var(--brand-accent);border-radius:3px;box-shadow:0 0 15px rgba(56,189,248,.75)}
.about-copy p{font-size:15px;line-height:1.9;color:#C7D6E8;margin-bottom:12px}
.about-list{list-style:none;margin-top:16px}
.about-list li{position:relative;padding:7px 0 7px 30px;color:#D7E2F1;font-size:14px;border-bottom:1px dashed rgba(255,255,255,.08)}
.about-list li::before{content:"✓";position:absolute;left:0;top:7px;width:21px;height:21px;border-radius:50%;background:rgba(45,212,191,.18);border:1px solid rgba(45,212,191,.45);color:#2DD4BF;font-size:12px;display:flex;align-items:center;justify-content:center;line-height:1}
.stats-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.stat-block{
    background:rgba(255,255,255,.055);border:1px solid rgba(255,255,255,.12);
    border-radius:20px;padding:24px 16px 18px;text-align:center;
    backdrop-filter:blur(8px);
    transition:var(--ease);
}
.stat-block:hover{background:rgba(255,255,255,.09);border-color:rgba(125,211,252,.35);transform:translateY(-3px)}
.stat-num{
    font-family:var(--font-num);font-size:32px;line-height:1.15;font-weight:700;color:#fff;
    letter-spacing:-.5px;
    background:linear-gradient(120deg,#8DE8FF,#38BDF8 55%,#2DD4BF);
    -webkit-background-clip:text;background-clip:text;
    -webkit-text-fill-color:transparent;
    display:block;
}
.stat-num .unit{font-size:19px;-webkit-text-fill-color:#7DD3FC;margin-left:2px}
.stat-label{display:block;font-size:13px;color:var(--text-secondary);margin-top:6px}
.stat-sub{font-size:12px;color:var(--text-muted);margin-top:3px}

.faq-wrap{background:linear-gradient(180deg,rgba(15,27,48,.5),transparent 40%);}
.faq-list{max-width:940px;display:flex;flex-direction:column;gap:12px}
.faq-item{
    background:rgba(255,255,255,.035);border:1px solid rgba(255,255,255,.11);
    border-radius:18px;overflow:hidden;transition:var(--ease);
}
.faq-item[open]{background:rgba(37,99,235,.09);border-color:rgba(56,189,248,.28)}
.faq-item summary{
    list-style:none;cursor:pointer;display:flex;align-items:center;gap:16px;
    padding:18px 22px;justify-content:space-between;
    font-size:16px;font-weight:600;color:#E4EDF8;line-height:1.6;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-num{font-family:var(--font-num);font-size:13px;color:#2DD4BF;width:30px;text-align:center;flex-shrink:0;font-weight:700;letter-spacing:.5px}
.faq-title{flex:1}
.faq-icon{
    width:28px;height:28px;border-radius:50%;background:rgba(255,255,255,.08);
    display:flex;align-items:center;justify-content:center;position:relative;flex-shrink:0;transition:all .25s ease;
}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;width:11px;height:1.8px;background:#7DD3FC;transition:var(--ease)}
.faq-icon::after{transform:rotate(90deg)}
.faq-item[open] .faq-icon{background:rgba(37,99,235,.3)}
.faq-item[open] .faq-icon::after{transform:rotate(0)}
.faq-answer{padding:0 24px 20px 70px;color:#B4C3D8;line-height:1.85;font-size:15px}

.cta-banner{
    position:relative;overflow:hidden;border-radius:24px;
    background:linear-gradient(110deg,rgba(13,31,60,.98),rgba(18,41,80,.92),rgba(13,26,48,.98)),url('/assets/images/backpic/back-3.png') center/cover no-repeat;
    border:1px solid rgba(125,211,252,.18);
    padding:50px;display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
}
.cta-banner::after{content:"";position:absolute;bottom:-90px;right:10%;width:220px;height:220px;background:radial-gradient(rgba(45,212,191,.2),transparent 70%);z-index:1}
.cta-text{position:relative;z-index:2;flex:1;min-width:250px}
.cta-text h2{color:#fff;font-size:28px;line-height:1.4;margin-bottom:9px}
.cta-text p{color:#B2C7E2;line-height:1.8;font-size:15px;max-width:650px}
.cta-btns{position:relative;z-index:2;display:flex;flex-wrap:wrap;gap:10px;flex-shrink:0}

.footer{
    background:rgba(9,15,28,.86);
    border-top:1px solid transparent;
    border-image:linear-gradient(90deg,transparent,#1E293B 45%,transparent) 1;
    padding:42px 32px 22px;
    margin-top:14px;
}
.footer-inner{
    max-width:1200px;margin:0 auto;
    display:grid;grid-template-columns:2.1fr 1fr 1fr 1.2fr;gap:36px;
}
.footer-brand h3{font-size:17px;color:#fff;font-weight:700;margin-bottom:7px;letter-spacing:.2px}
.footer-brand .brand-pin{margin-bottom:12px;width:38px;height:38px;border-radius:10px;background:linear-gradient(140deg,#2563EB,#38BDF8);display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow-glow)} 
.footer-brand .brand-pin i{width:8px;height:8px;border-radius:50%;background:#fff}
.footer-brand p{font-size:13px;color:var(--text-muted);line-height:1.85;max-width:260px}
.footer-title{font-size:15px;font-weight:600;color:#DCE7F5;margin-bottom:16px}
.footer-links{list-style:none;display:flex;flex-direction:column;gap:8px}
.footer-links li{list-style:none}
.footer-links a{color:var(--text-muted);font-size:14px}
.footer-links a:hover{color:var(--brand-accent);padding-left:4px}
.footer-contact{display:flex;flex-direction:column;gap:12px;font-size:14px;color:var(--text-muted)}
.footer-contact-row{display:flex;gap:9px;align-items:flex-start;line-height:1.7}
.footer-contact-row svg{width:18px;height:18px;stroke:#64748B;margin-top:3px;flex-shrink:0}
.footer-bottom{
    border-top:1px solid rgba(255,255,255,.06);
    margin-top:30px;padding-top:18px;
    text-align:center;font-size:13px;color:var(--text-muted);
    display:flex;align-items:center;justify-content:space-between;gap:15px;flex-wrap:wrap;
}
.footer-domain{font-family:var(--font-num);font-size:13px;color:#64748B}
.footer-safety{font-size:12px;color:#48566B}

.to-top{
    position:fixed;right:24px;bottom:28px;z-index:100;width:42px;height:42px;border-radius:12px;
    background:rgba(37,99,235,.8);border:1px solid rgba(125,211,252,.35);
    display:flex;align-items:center;justify-content:center;color:#fff;
    box-shadow:var(--shadow-glow);opacity:0;visibility:hidden;transform:translateY(12px);
    transition:var(--ease);
}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{background:#2563EB;color:#fff}
.to-top svg{width:18px;height:18px;stroke:#fff}

@media(max-width:1024px){
    :root{--space-section:58px;--space-section-mid:36px}
    .sidebar{transform:translateX(-100%);box-shadow:none;width:278px}
    body.nav-open .sidebar{transform:translateX(0);box-shadow:0 0 60px rgba(0,0,0,.55)}
    .main-wrap{width:100%;margin-left:0}
    .mobile-header{display:flex}
    .content{padding:0 20px}
    .hero{margin-top:16px;min-height:0}
    .hero-inner{grid-template-columns:1fr;padding:24px}
    .hero-visual{display:none}
    .hero h1{font-size:32px}
    .hero-desc{font-size:15px}
    .section-title{font-size:27px}
    .about-grid{grid-template-columns:1fr;gap:27px}
    .stats-grid{grid-template-columns:repeat(4,1fr)}
    .spotlight-grid{grid-template-columns:1fr}
    .spot-cards{display:grid;grid-template-columns:1fr 1fr}
    .platform-grid{gap:16px}
    .mode-card.third{grid-column:span 6}
    .footer-inner{grid-template-columns:1fr 1fr;gap:27px}
}
@media(max-width:767px){
    :root{--space-section:44px;--space-section-mid:28px}
    .content{padding:0 15px}
    .top-notice{flex-wrap:wrap}
    .hero{min-height:0;padding:0}
    .hero-inner{padding:24px 18px 34px}
    .hero h1{font-size:27px;line-height:1.34}
    .hero-desc{font-size:15px;line-height:1.8}
    .hero-btns{flex-direction:column;gap:12px}
    .btn{width:100%;padding:13px 22px}
    .hero-tags{gap:7px}
    .hero-tag{font-size:12px;padding:5px 10px}
    .section-title{font-size:23px;padding-right:0}
    .section-head-row{margin-bottom:20px}
    .section-sub{font-size:14px}
    .spot-main{min-height:0;padding:20px}
    .spot-main h3{font-size:20px}
    .spot-cards{grid-template-columns:1fr}
    .spot-card{min-height:0}
    .mode-card.third,.mode-card.half{grid-column:span 12}
    .mode-card{min-height:0;padding:21px}
    .news-panel{padding:15px}
    .news-item{grid-template-columns:74px 1fr;gap:12px;padding:12px 10px;min-height:0}
    .news-thumb{width:74px;height:58px;border-radius:9px}
    .news-title{font-size:15px}
    .news-desc{display:none}
    .news-meta{display:none}
    .news-item::after{
        content:"→";position:absolute;right:14px;top:13px;font-size:18px;color:#55677D;display:none;
    }
    .about-zone{padding:20px}
    .about-copy h2{font-size:24px}
    .about-copy p, .about-list li{font-size:14px}
    .stat-num{font-size:24px}
    .stat-label{font-size:12px}
    .stats-grid{gap:9px}
    .stat-block{padding:18px 8px 15px;border-radius:14px}
    .footer{padding:38px 15px 19px;margin-top:10px}
    .footer-inner{grid-template-columns:1fr}
    .footer-contact-col{grid-column:1}
    .footer{border-image:linear-gradient(90deg,transparent,#26374f,transparent) 1}
    .footer-bottom{flex-direction:column;text-align:center}
    .cta-banner{padding:28px 19px}
    .cta-text h2{font-size:24px}
    .cta-btns{width:100%}
    .cta-btns .btn{width:100%}
    .faq-item summary{padding:14px 15px;font-size:14px}
    .faq-answer{padding:0 17px 17px 52px}
    .to-top{right:14px;bottom:16px;width:38px;height:38px}
}
@media(max-width:520px){
    .hero-badge{font-size:12px;padding:4px 10px}
    .hero h1{font-size:23px}
    .hero-desc{font-size:14px}
    .about-grid,.news-panel,.platform-grid{margin-top:0}
    .top-notice p{font-size:12px}
    .section-lab{font-size:12px}
}

/* roulang page: article */
:root{
    --bg-base:#0B1220;
    --bg-elevated:#111C2E;
    --bg-side:#0F172A;
    --glass-bg:rgba(255,255,255,.06);
    --glass-bg-strong:rgba(255,255,255,.09);
    --glass-border:rgba(255,255,255,.12);
    --glass-border-hover:rgba(255,255,255,.22);
    --text-primary:#F1F5F9;
    --text-secondary:#94A3B8;
    --text-muted:#64748B;
    --brand-primary:#2563EB;
    --brand-primary-dark:#1D4ED8;
    --brand-accent:#38BDF8;
    --success-accent:#2DD4BF;
    --warn:#F59E0B;
    --danger:#F43F5E;
    --link:#7DD3FC;
    --radius-xs:8px;
    --radius-sm:12px;
    --radius-lg:16px;
    --radius-pill:999px;
    --shadow-nav:0 8px 24px rgba(0,0,0,.28);
    --shadow-card:0 4px 16px rgba(0,0,0,.18);
    --shadow-hover:0 10px 30px rgba(0,0,0,.32);
    --glow-blue:0 0 20px rgba(37,99,235,.45);
    --glow-accent:0 0 0 3px rgba(56,189,248,.16);
    --font-cn:"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
    --font-num:Inter,"Segoe UI",Roboto,"PingFang SC","Microsoft YaHei",sans-serif;
    --transition:all .22s ease;
    --sidebar-w:260px;
    --content-w:1280px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
    margin:0;
    background:var(--bg-base);
    color:var(--text-primary);
    font-family:var(--font-cn);
    font-size:16px;
    line-height:1.7;
    -webkit-font-smoothing:antialiased;
}
body.menu-open{overflow:hidden}
body.no-scroll{overflow:hidden}
a{color:var(--link);text-decoration:none;transition:var(--transition)}
a:hover{color:var(--brand-accent)}
a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid var(--brand-accent);outline-offset:2px;border-radius:var(--radius-xs)}
button{font-family:inherit;border:0;cursor:pointer;background:none;color:inherit}
img{max-width:100%;display:block}
h1,h2,h3,h4,p,figure,ul,ol,dl,blockquote{margin:0}
ul,ol{padding:0;list-style:none}
.skip-link{
    position:fixed;left:16px;top:-60px;z-index:999;padding:10px 18px;
    color:#fff;background:var(--brand-primary);border-radius:var(--radius-sm);
    transition:top .2s ease;
}
.skip-link:focus{top:16px;color:#fff}
.icon-svg{width:20px;height:20px;display:inline-flex;align-items:center;justify-content:center}
.icon-svg svg{width:20px;height:20px}
.app-layout{display:grid;grid-template-columns:var(--sidebar-w) minmax(0,1fr);min-height:100vh}
.sidebar{
    position:relative;
    background:var(--bg-side);
    border-right:1px solid #1E293B;
    display:flex;
    flex-direction:column;
    height:100vh;
    position:sticky;
    top:0;
    z-index:80;
    padding:26px 18px 20px;
    overflow-y:auto;
    scrollbar-width:thin;
    scrollbar-color:#243044 transparent;
}
.sidebar::-webkit-scrollbar{width:5px}
.sidebar::-webkit-scrollbar-thumb{background:#243044;border-radius:var(--radius-pill)}
.brand-logo{
    display:flex;
    align-items:center;
    gap:12px;
    padding:0 4px 22px;
    border-bottom:1px solid rgba(255,255,255,.08);
    min-width:0;
}
.brand-pin{
    position:relative;
    width:42px;height:42px;
    flex:0 0 42px;
    display:flex;
    align-items:center;
    justify-content:center;
    border-radius:12px;
    background:linear-gradient(135deg,rgba(37,99,235,.95),rgba(56,189,248,.84));
    box-shadow:0 0 18px rgba(37,99,235,.5);
}
.brand-pin i{
    display:block;width:10px;height:10px;border-radius:999px;
    background:#fff;
    box-shadow:0 0 0 4px rgba(255,255,255,.24),0 0 16px #fff;
}
.brand-copy{min-width:0}
.brand-name{
    font-size:18px;
    font-weight:700;
    color:#fff;
    line-height:1.3;
    letter-spacing:.2px;
    display:block;
    word-break:break-all;
}
.brand-domain{
    display:block;
    margin-top:5px;
    font-family:var(--font-num);
    font-size:11px;
    color:var(--text-muted);
    letter-spacing:.3px;
}
.sidebar-nav{margin-top:24px;flex:1}
.nav-caption{
    padding:0 12px 10px;
    font-size:12px;
    letter-spacing:3px;
    color:var(--text-muted);
    text-transform:uppercase;
}
.nav-list{display:flex;flex-direction:column;gap:6px}
.nav-item{margin:0}
.nav-link{
    display:flex;
    align-items:center;
    gap:12px;
    padding:11px 14px;
    color:var(--text-secondary);
    font-size:15px;
    font-weight:500;
    border-left:3px solid transparent;
    border-radius:10px;
    min-height:44px;
}
.nav-link .icon-svg{color:var(--text-muted);flex:none}
.nav-link svg{width:20px;height:20px;transition:var(--transition)}
.nav-link:hover{background:rgba(255,255,255,.06);color:#fff}
.nav-link:hover .icon-svg{color:#fff}
.nav-link.active{
    background:rgba(37,99,235,.18);
    border-left-color:var(--brand-accent);
    color:#fff;
    box-shadow:inset 0 1px 0 rgba(255,255,255,.05);
}
.nav-link.active .icon-svg{color:var(--brand-accent)}
.sidebar-help{
    margin-top:22px;
    padding:14px;
    border:1px solid rgba(255,255,255,.08);
    border-radius:var(--radius-sm);
    background:rgba(255,255,255,.035);
    color:var(--text-secondary);
    font-size:13px;
    line-height:1.7;
}
.sidebar-help strong{display:flex;align-items:center;gap:8px;font-weight:600;color:var(--text-primary);font-size:14px;margin-bottom:6px}
.sidebar-help strong .help-dot{width:7px;height:7px;border-radius:50%;background:var(--success-accent);box-shadow:0 0 12px rgba(45,212,191,.8)}
.sidebar-help p{margin-top:4px;font-family:var(--font-num);color:var(--text-muted);font-size:12px;letter-spacing:.2px}
.side-close{display:none}
.side-overlay{display:none}
.stage{
    position:relative;
    min-width:0;
    background:var(--bg-base);
}
.stage::before{
    content:"";
    position:absolute;
    inset:0;
    background:
        radial-gradient(58% 42% at 88% -5%,rgba(37,99,235,.22),transparent 70%),
        radial-gradient(38% 30% at -5% 26%,rgba(56,189,248,.10),transparent 70%),
        linear-gradient(120deg,rgba(255,255,255,.02),transparent 40%),
        url('/assets/images/backpic/back-1.webp') center top / cover no-repeat;
    opacity:.5;
    pointer-events:none;
    z-index:0;
}
.stage>*{position:relative;z-index:1}
.noticebar{
    display:flex;
    align-items:center;
    gap:10px;
    width:100%;
    padding:10px clamp(18px,4vw,48px);
    background:rgba(37,99,235,.12);
    border-bottom:1px solid rgba(56,189,248,.2);
    font-size:14px;
    color:var(--text-secondary);
}
.noticebar .notice-icon{width:18px;height:18px;color:var(--brand-accent);flex:none}
.noticebar-copy{flex:1;min-width:0}
.noticebar-close{
    width:30px;height:30px;border-radius:9px;
    display:flex;align-items:center;justify-content:center;
    color:var(--text-muted);transition:var(--transition);
    flex:none;
}
.noticebar-close:hover{background:rgba(255,255,255,.1);color:#fff}
.noticebar-close svg{width:16px;height:16px}
.mobile-topbar{
    display:none;
    align-items:center;
    justify-content:space-between;
    padding:12px 18px;
    border-bottom:1px solid rgba(255,255,255,.08);
    background:rgba(11,18,32,.85);
    backdrop-filter:blur(18px);
    -webkit-backdrop-filter:blur(18px);
    min-height:62px;
}
.mobile-brand{
    display:flex;
    align-items:center;
    gap:9px;
    color:#fff;
    font-size:16px;
    font-weight:700;
    min-width:0;
}
.mobile-brand .brand-pin{width:34px;height:34px;flex:0 0 34px;border-radius:10px}
.mobile-brand-copy{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.mobile-menu-opener{
    width:42px;height:42px;
    border-radius:12px;
    display:flex;align-items:center;justify-content:center;
    color:var(--text-secondary);
    border:1px solid rgba(255,255,255,.1);
    background:rgba(255,255,255,.05);
}
.mobile-menu-opener svg{width:20px;height:20px}
.main-content{
    max-width:var(--content-w);
    margin:0 auto;
    padding:42px clamp(18px,4vw,48px) 90px;
    width:100%;
}
.breadcrumb{
    display:flex;
    align-items:center;
    flex-wrap:wrap;
    gap:8px;
    font-size:14px;
    color:var(--text-secondary);
    margin-bottom:26px;
}
.breadcrumb a{color:var(--text-secondary)}
.breadcrumb a:hover{color:#fff}
.breadcrumb .breadcrumb-cur{color:var(--text-primary);font-weight:500;max-width:360px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.breadcrumb i{font-style:normal;color:var(--text-muted)}
.article-shell{max-width:1120px;margin:0 auto}
.article-panel{
    max-width:900px;
    margin:0 auto;
    padding:clamp(24px,4vw,44px);
    border:1px solid var(--glass-border);
    border-radius:20px;
    background:linear-gradient(135deg,rgba(255,255,255,.085),rgba(255,255,255,.028));
    box-shadow:var(--shadow-card);
    backdrop-filter:blur(16px);
    -webkit-backdrop-filter:blur(16px);
}
.article-head{margin-bottom:28px;padding-bottom:28px;border-bottom:1px solid rgba(255,255,255,.08)}
.article-head-meta{
    display:flex;
    align-items:center;
    flex-wrap:wrap;
    gap:10px;
    margin-bottom:18px;
}
.article-head-meta .meta-chip{
    display:inline-flex;
    align-items:center;
    gap:6px;
    padding:4px 12px;
    border-radius:var(--radius-pill);
    background:rgba(56,189,248,.15);
    border:1px solid rgba(56,189,248,.26);
    color:var(--brand-accent);
    font-size:13px;
    font-weight:500;
}
.article-head-meta .meta-line{
    display:inline-flex;
    align-items:center;
    gap:7px;
    color:var(--text-muted);
    font-size:13px;
    font-family:var(--font-num);
}
.article-head-meta .meta-line .meta-icon{width:16px;height:16px}
.article-panel h1{
    font-size:min(38px,5.2vw);
    line-height:1.28;
    font-weight:700;
    letter-spacing:-.3px;
    color:#fff;
    margin-bottom:0;
    word-break:break-word;
}
.article-content{
    color:rgba(241,245,249,.9);
    font-size:16.5px;
    line-height:1.85;
    letter-spacing:.1px;
    word-break:break-word;
}
.article-content>p:not(:first-child),.article-content>h2:not(:first-child),.article-content>h3:not(:first-child),.article-content>ul:not(:first-child),.article-content>ol:not(:first-child),.article-content>blockquote:not(:first-child),.article-content>figure:not(:first-child){margin-top:24px}
.article-content p{font-size:16.5px;line-height:1.9}
.article-content h2{
    font-size:24px;
    line-height:1.4;
    color:#fff;
    padding-left:16px;
    position:relative;
    margin-top:38px;
    font-weight:700;
}
.article-content h2::before{
    content:"";
    position:absolute;
    left:0;top:.2em;
    width:4px;height:.8em;
    border-radius:4px;
    background:linear-gradient(180deg,var(--brand-accent),var(--success-accent));
    box-shadow:0 0 12px rgba(56,189,248,.6);
}
.article-content h3{font-size:20px;color:#fff;margin-top:30px;font-weight:600;line-height:1.5}
.article-content img{border-radius:16px;margin:24px 0;box-shadow:var(--shadow-card)}
.article-content a{color:var(--link);border-bottom:1px solid rgba(125,211,252,.4);padding-bottom:1px}
.article-content a:hover{color:var(--brand-accent);border-bottom-color:var(--brand-accent)}
.article-content ul,.article-content ol{margin-left:4px}
.article-content ul li,.article-content ol li{position:relative;padding-left:22px;margin-top:10px;line-height:1.85}
.article-content ul li::before{
    content:"";
    position:absolute;
    left:3px;top:.82em;
    width:6px;height:6px;
    border-radius:3px;
    background:var(--brand-accent);
    box-shadow:0 0 8px rgba(56,189,248,.7);
}
.article-content ol{counter-reset:art-ol}
.article-content ol li{counter-increment:art-ol}
.article-content ol li::before{
    content:counter(art-ol) ".";
    left:0;
    top:0;
    width:24px;
    color:var(--brand-accent);
    font-family:var(--font-num);
    font-weight:600;
}
.article-content blockquote{
    background:rgba(56,189,248,.09);
    border-left:3px solid var(--brand-accent);
    padding:16px 20px;
    margin:24px -10px;
    border-radius:0 12px 12px 0;
    color:var(--text-secondary);
    font-style:normal;
}
.article-content blockquote p{color:var(--text-secondary)}
.article-content code{
    background:rgba(255,255,255,.1);
    border:1px solid rgba(255,255,255,.1);
    border-radius:6px;
    padding:2px 7px;
    font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
    font-size:.92em;
}
.article-content pre{
    background:rgba(0,0,0,.28);
    border:1px solid rgba(255,255,255,.1);
    padding:18px;
    border-radius:14px;
    margin:24px 0;
    overflow-x:auto;
}
.article-content pre code{background:none;border:0;padding:0;color:#E2E8F0}
.article-content table{display:block;width:100%;max-width:100%;overflow-x:auto;border-collapse:collapse;margin:24px 0}
.article-content table td,.article-content table th{
    border:1px solid rgba(255,255,255,.12);
    background:rgba(255,255,255,.02);
    padding:10px 14px;
    text-align:left;
    white-space:nowrap;
}
.empty-card{
    text-align:center;
    padding:52px 20px 46px;
    background:rgba(255,255,255,.02);
    border:1px solid rgba(255,255,255,.08);
    border-radius:20px;
}
.empty-icon{
    width:52px;height:52px;
    margin:0 auto 18px;
    border-radius:20px;
    background:rgba(56,189,248,.12);
    display:flex;
    align-items:center;
    justify-content:center;
    color:var(--brand-accent);
}
.empty-icon svg{width:26px;height:26px}
.empty-card h2{font-size:22px;color:#fff;font-weight:600}
.empty-card p{color:var(--text-secondary);margin:12px auto 22px;max-width:480px}
.button-group{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.btn-main,.btn-secondary,.btn-link{display:inline-flex;align-items:center;justify-content:center;gap:9px;min-height:44px;border-radius:12px;font-size:15px;font-weight:600;transition:var(--transition);padding:0 22px}
.btn-main{
    color:#fff;
    background:linear-gradient(135deg,#2563EB,#1D4ED8);
    box-shadow:0 4px 14px rgba(37,99,235,.34);
}
.btn-main:hover{color:#fff;transform:translateY(-1px);box-shadow:0 0 20px rgba(37,99,235,.52),0 8px 20px rgba(0,0,0,.2)}
.btn-main:active{transform:translateY(1px);box-shadow:0 0 14px rgba(37,99,235,.45)}
.btn-secondary{
    color:#E2E8F0;
    background:rgba(255,255,255,.06);
    border:1px solid rgba(255,255,255,.18);
}
.btn-secondary:hover{background:rgba(255,255,255,.12);border-color:rgba(255,255,255,.32);color:#fff;transform:translateY(-1px)}
.btn-secondary:active{transform:translateY(1px)}
.btn-link{padding:0 6px;color:var(--text-secondary);font-size:14px}
.btn-link .arrow-icon{width:17px;height:17px;transition:transform .22s ease}
.btn-link:hover{color:var(--brand-accent)}
.btn-link:hover .arrow-icon{transform:translateX(4px)}
.article-foot{
    display:flex;
    flex-wrap:wrap;
    align-items:center;
    justify-content:space-between;
    gap:14px;
    margin-top:34px;
    padding-top:24px;
    border-top:1px solid rgba(255,255,255,.09);
}
.article-foot::after{display:none}
.foot-link-group{display:flex;gap:10px;flex-wrap:wrap}
.foot-note{color:var(--text-muted);font-size:12px;display:inline-flex;align-items:center;gap:6px}
.foot-note .dot{width:5px;height:5px;border-radius:50%;background:var(--success-accent);box-shadow:0 0 8px var(--success-accent)}
.related-section{
    max-width:1120px;
    margin:36px auto 0;
    padding-top:14px;
}
.related-section-title{
    display:flex;
    align-items:center;
    gap:11px;
    font-size:20px;
    font-weight:700;
    color:#fff;
    margin-bottom:10px;
}
.related-section-title .bar{
    width:4px;height:20px;
    border-radius:4px;
    background:linear-gradient(180deg,var(--brand-accent),var(--success-accent));
    box-shadow:0 0 12px rgba(56,189,248,.5);
}
.related-section-sub{color:var(--text-muted);font-size:14px;margin-bottom:24px;max-width:650px}
.related-grid{
    display:grid;
    grid-template-columns:repeat(3,1fr);
    gap:20px;
}
.rel-card{
    position:relative;
    display:block;
    overflow:hidden;
    border-radius:18px;
    background:rgba(255,255,255,.045);
    border:1px solid rgba(255,255,255,.1);
    transition:var(--transition);
}
.rel-card:hover{
    border-color:rgba(56,189,248,.4);
    background:rgba(56,189,248,.07);
    box-shadow:var(--shadow-hover);
    transform:translateY(-3px);
}
.rel-card:hover img{transform:scale(1.04)}
.rel-card .rel-cover{
    position:relative;
    overflow:hidden;
    height:122px;
    background:linear-gradient(135deg,#1E2A3A,#0B1220);
}
.rel-card .rel-cover img{
    width:100%;height:100%;object-fit:cover;
    transition:transform .45s ease;
}
.rel-card .rel-cover::after{
    content:"";
    position:absolute;inset:0;
    background:linear-gradient(180deg,rgba(3,8,18,.08),rgba(9,15,30,.75));
}
.rel-card-content{
    display:block;
    padding:16px 18px 18px;
    position:relative;
}
.rel-card-title{
    display:block;
    color:#F8FAFC;
    font-size:16px;
    font-weight:600;
    line-height:1.5;
    margin-bottom:8px;
}
.rel-card-cta{
    display:inline-flex;
    align-items:center;
    gap:5px;
    color:var(--brand-accent);
    font-size:13px;
}
.rel-card-cta svg{width:15px;height:15px;transition:var(--transition)}
.rel-card:hover .rel-card-cta svg{transform:translateX(3px)}
.back-top-btn{
    position:fixed;
    right:24px;bottom:30px;
    width:46px;height:46px;
    border-radius:14px;
    display:flex;
    align-items:center;
    justify-content:center;
    background:linear-gradient(135deg,#2563EB,#1D4ED8);
    color:#fff;
    box-shadow:0 8px 22px rgba(0,0,0,.4),0 0 16px rgba(37,99,235,.45);
    opacity:0;
    visibility:hidden;
    transform:translateY(12px);
    transition:var(--transition);
    z-index:88;
}
.back-top-btn.show{opacity:1;visibility:visible;transform:translateY(0)}
.back-top-btn:hover{background:#2563EB;color:#fff;transform:translateY(-3px)}
.back-top-btn svg{width:20px;height:20px}
.footer{
    position:relative;
    background:#0D1624;
    border-top:1px solid rgba(255,255,255,.08);
    padding:56px 24px 24px;
    z-index:2;
}
.footer::before{
    content:"";
    position:absolute;
    top:-1px;left:0;right:0;height:1px;
    background:linear-gradient(90deg,transparent,#1E293B,transparent);
}
.footer-inner{
    max-width:1200px;
    margin:0 auto;
    display:grid;
    grid-template-columns:1.5fr 1fr 1fr 1.2fr;
    gap:36px;
    padding-bottom:36px;
}
.footer-brand{min-width:0}
.footer-brand .brand-pin{width:36px;height:36px;flex:0 0 36px;border-radius:10px;margin-bottom:14px}
.footer-brand .brand-pin i{width:9px;height:9px}
.footer-brand h3{font-size:18px;font-weight:700;color:#fff;line-height:1.35;margin-bottom:10px}
.footer-brand p{color:var(--text-muted);font-size:13px;line-height:1.85;max-width:340px}
.footer-title{
    font-size:15px;
    font-weight:600;
    color:rgba(255,255,255,.85);
    margin-bottom:16px;
}
.footer-links{display:flex;flex-direction:column;gap:10px}
.footer-links a{color:var(--text-muted);font-size:14px}
.footer-links a:hover{color:var(--brand-accent)}
.footer-contact{display:flex;flex-direction:column;gap:12px}
.footer-contact-row{
    display:flex;
    align-items:flex-start;
    gap:8px;
    color:var(--text-muted);
    font-size:13px;
    line-height:1.55;
}
.footer-contact-row svg{width:17px;height:17px;color:var(--text-secondary);flex:none;margin-top:2px}
.footer-bottom{
    max-width:1200px;
    margin:0 auto;
    padding-top:20px;
    border-top:1px solid rgba(255,255,255,.07);
    display:flex;
    flex-wrap:wrap;
    gap:10px 18px;
    justify-content:space-between;
    color:var(--text-muted);
    font-size:13px;
}
.footer-domain{
    font-family:var(--font-num);
    color:var(--text-secondary);
}
.footer-safety{opacity:.8}
@media (max-width:1023.98px){
    .app-layout{display:block}
    .sidebar{
        position:fixed;
        left:0;top:0;bottom:0;
        width:272px;
        height:100vh;
        transform:translateX(-108%);
        transition:transform .3s cubic-bezier(.4,0,.2,1);
        border-radius:0 20px 20px 0;
        box-shadow:20px 0 50px rgba(0,0,0,.4);
        z-index:100;
        display:flex;
        padding:22px 16px;
    }
    body.menu-open .sidebar{transform:translateX(0)}
    .side-overlay{
        display:block;
        position:fixed;
        inset:0;
        z-index:92;
        background:rgba(4,8,17,.72);
        opacity:0;
        visibility:hidden;
        transition:var(--transition);
        backdrop-filter:blur(3px);
        -webkit-backdrop-filter:blur(3px);
    }
    body.menu-open .side-overlay{opacity:1;visibility:visible}
    .side-close{
        display:flex;
        position:absolute;
        top:18px;right:14px;
        width:38px;height:38px;
        align-items:center;justify-content:center;
        color:var(--text-muted);
        border-radius:12px;
        background:rgba(255,255,255,.06);
    }
    .side-close:hover{color:#fff;background:rgba(255,255,255,.12)}
    .side-close svg{width:18px;height:18px}
    .brand-logo{padding-right:38px}
    .mobile-topbar{display:flex}
    .main-content{padding:34px 22px 72px}
    .footer-inner{grid-template-columns:1fr 1fr;gap:28px}
}
@media (max-width:767.98px){
    .noticebar{flex-wrap:wrap;padding:9px 14px;font-size:13px}
    .noticebar-copy{min-width:none}
    .article-panel{
        border-radius:16px;
        padding:22px 16px;
    }
    .article-panel h1{font-size:25px;line-height:1.4}
    .article-content{font-size:15.5px}
    .article-content p{font-size:15.5px;line-height:1.85}
    .breadcrumb{font-size:13px}
    .breadcrumb .breadcrumb-cur{max-width:220px}
    .related-grid{grid-template-columns:1fr}
    .rel-card{display:grid;grid-template-columns:126px 1fr}
    .rel-card .rel-cover{height:100%;min-height:96px}
    .rel-card .rel-cover img{height:100%}
    .rel-card-content{padding:13px 15px 14px}
    .button-group{width:100%}
    .btn-main,.btn-secondary{width:100%;padding:0 16px}
    .article-foot{flex-direction:column;align-items:stretch}
    .foot-link-group .btn-link{justify-content:center;width:100%}
    .footer{padding:44px 16px 20px}
    .footer-inner{grid-template-columns:1fr;gap:24px;padding-bottom:26px}
    .footer-bottom{justify-content:center;text-align:center}
    .back-top-btn{right:14px;bottom:18px;width:44px;height:44px}
}
@media (max-width:520px){
    .main-content{padding:24px 14px 56px}
    .article-shell{padding:0 2px}
    .article-content blockquote{margin-left:0;margin-right:0}
    .rel-card{grid-template-columns:1fr}
    .rel-card .rel-cover{height:112px}
}

/* roulang page: category1 */
:root{
  --bg-base:#0B1220;
  --bg-elevated:#111C2E;
  --bg-sidebar:#0F172A;
  --glass-bg:rgba(255,255,255,0.06);
  --glass-border:rgba(255,255,255,0.12);
  --text-primary:#F1F5F9;
  --text-secondary:#94A3B8;
  --text-muted:#64748B;
  --brand-primary:#2563EB;
  --brand-accent:#38BDF8;
  --success-accent:#2DD4BF;
  --warn:#F59E0B;
  --danger:#F43F5E;
  --link:#7DD3FC;
  --radius:16px;
  --radius-sm:12px;
  --radius-lg:20px;
  --shadow:0 4px 16px rgba(0,0,0,.18);
  --shadow-hover:0 8px 28px rgba(0,0,0,.28);
  --glow:0 0 22px rgba(37,99,235,.42);
  --side-w:260px;
  --container:1200px;
  --space:76px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  background:var(--bg-base);
  color:var(--text-primary);
  font-family:"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,"Segoe UI",Roboto,sans-serif;
  font-size:16px;
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0}
a{color:var(--link);text-decoration:none;transition:color .25s ease}
a:hover{color:var(--brand-accent)}
a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid var(--brand-accent);outline-offset:2px;border-radius:6px}
button{font-family:inherit;cursor:pointer}
ul,ol{list-style:none}
.container{max-width:var(--container);margin:0 auto;padding:0 32px;width:100%}

/* ===== 侧边导航 ===== */
.sidebar{
  position:fixed;
  inset:0 auto 0 0;
  width:var(--side-w);
  z-index:120;
  background:var(--bg-sidebar);
  border-right:1px solid #1E293B;
  display:flex;
  flex-direction:column;
  overflow-x:hidden;
  overflow-y:auto;
  scrollbar-width:thin;
  scrollbar-color:#1E293B transparent;
}
.sidebar::-webkit-scrollbar{width:5px}
.sidebar::-webkit-scrollbar-thumb{background:#1E293B;border-radius:8px}
.sidebar-brand{padding:22px 18px 18px}
.brand-main{display:flex;align-items:center;gap:11px}
.brand-pin{
  width:40px;height:40px;border-radius:11px;flex:none;
  background:linear-gradient(135deg,#2563EB,#1D4ED8);
  display:inline-flex;align-items:center;justify-content:center;
  box-shadow:0 0 16px rgba(37,99,235,.34);
}
.brand-pin i{
  width:9px;height:9px;border-radius:50%;
  background:#E0F2FE;
  box-shadow:0 0 12px rgba(255,255,255,.92);
}
.brand-detail{display:flex;flex-direction:column;min-width:0}
.brand-name{
  font-size:16px;line-height:1.35;font-weight:700;color:#F8FAFC;
  letter-spacing:.2px;
}
.brand-sub{
  font-size:11px;color:var(--text-muted);letter-spacing:.5px;
  margin-top:3px;
}
.sidebar-nav{flex:1;padding:14px 12px}
.nav-caption{
  font-size:12px;color:var(--text-muted);
  padding:0 12px 10px;letter-spacing:2px;
}
.nav-list{display:flex;flex-direction:column;gap:4px}
.nav-item{position:relative}
.nav-link{
  display:flex;align-items:center;gap:13px;
  height:46px;padding:0 13px;
  border-radius:12px;
  font-size:15px;font-weight:500;
  color:var(--text-secondary);
  position:relative;
  transition:background .25s ease,color .2s ease;
}
.nav-link svg{width:20px;height:20px;flex:none;stroke:currentColor}
.nav-link:hover{background:rgba(255,255,255,.06);color:#F8FAFC}
.nav-link.active{
  background:linear-gradient(90deg,rgba(37,99,235,.24),rgba(37,99,235,.07));
  color:#F8FAFC;
}
.nav-link.active::before{
  content:"";
  position:absolute;
  left:-12px;top:50%;
  transform:translateY(-50%);
  width:3px;height:22px;
  border-radius:0 6px 6px 0;
  background:var(--brand-accent);
  box-shadow:0 0 12px var(--brand-accent);
}
.sidebar-info{
  padding:16px 20px 18px;
  border-top:1px solid rgba(255,255,255,.06);
  font-size:12px;
  color:var(--text-muted);
  line-height:1.8;
}
.sidebar-info span{display:block}
.sidebar-info .dot{
  display:inline-block;width:6px;height:6px;border-radius:50%;
  background:var(--success-accent);margin-right:7px;vertical-align:1px;
  box-shadow:0 0 8px rgba(45,212,191,.7);
}

/* ===== 主容器 ===== */
.main-wrap{
  min-height:100vh;
  margin-left:var(--side-w);
  display:flex;
  flex-direction:column;
  width:calc(100% - var(--side-w));
}
.main-content{flex:1;width:100%}

/* 移动顶栏 */
.mobile-bar{
  display:none;
  position:sticky;top:0;z-index:90;
  height:60px;align-items:center;
  background:rgba(11,18,32,.88);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid rgba(255,255,255,.07);
  padding:0 16px;
}
.mobile-bar .brand-main{flex:1;min-width:0}
.mobile-bar .brand-name{font-size:15px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.mobile-bar .brand-pin{width:32px;height:32px;border-radius:9px}
.mobile-bar .brand-pin i{width:7px;height:7px}
.hamburger{
  width:42px;height:42px;border-radius:12px;flex:none;
  border:1px solid rgba(255,255,255,.1);
  background:rgba(255,255,255,.05);
  display:flex;align-items:center;justify-content:center;
  flex-direction:column;gap:5px;
  transition:background .25s;
}
.hamburger:hover{background:rgba(255,255,255,.1)}
.hamburger span{
  width:18px;height:2px;border-radius:99px;
  background:#E2E8F0;transition:.3s ease;
}
.hamburger.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.hamburger.open span:nth-child(2){opacity:0}
.hamburger.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.overlay{
  position:fixed;inset:0;z-index:110;
  background:rgba(2,6,23,.65);
  backdrop-filter:blur(3px);
  -webkit-backdrop-filter:blur(3px);
  opacity:0;visibility:hidden;
  transition:.3s ease;
}
.overlay.show{opacity:1;visibility:visible}

/* ===== 顶部通知条 ===== */
.top-notice{
  background:rgba(37,99,235,.12);
  border-bottom:1px solid rgba(56,189,248,.15);
}
.notice-inner{
  max-width:calc(var(--container) - 0px);
  margin:0 auto;
  padding:8px 20px 8px 32px;
  display:flex;align-items:center;gap:10px;
  font-size:13px;color:#CAE8FF;
  position:relative;
}
.notice-inner svg{width:16px;height:16px;color:var(--brand-accent);flex:none}
.notice-inner span{line-height:1.5;margin-right:auto}
.notice-close{
  border:0;background:transparent;color:#7A8DA6;padding:6px;
  width:28px;height:28px;border-radius:8px;
  display:flex;align-items:center;justify-content:center;
}
.notice-close:hover{background:rgba(255,255,255,.08);color:#fff}

/* ===== 按钮 ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  padding:13px 28px;border-radius:12px;
  font-size:16px;font-weight:600;line-height:1;
  transition:transform .25s ease,box-shadow .25s ease,background .25s ease,border-color .25s ease;
}
.btn svg{width:18px;height:18px;flex:none}
.btn-primary{
  background:linear-gradient(135deg,#2563EB,#1D4ED8);
  color:#fff;
  border:1px solid rgba(56,189,248,.2);
  box-shadow:0 10px 28px rgba(37,99,235,.28);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 0 24px rgba(37,99,235,.46),0 12px 30px rgba(37,99,235,.24);color:#fff}
.btn-primary:active{transform:translateY(0);box-shadow:0 0 12px rgba(37,99,235,.35)}
.btn-ghost{
  background:rgba(255,255,255,.06);
  border:1px solid var(--glass-border);
  color:#E2E8F0;
}
.btn-ghost:hover{background:rgba(255,255,255,.12);border-color:rgba(255,255,255,.28);color:#fff;transform:translateY(-1px)}
.btn-ghost:active{transform:translateY(0)}

/* ===== 面包屑 ===== */
.breadcrumb{
  display:flex;align-items:center;gap:9px;
  font-size:14px;color:var(--text-muted);
  margin-bottom:26px;flex-wrap:wrap;
}
.breadcrumb a{color:var(--text-secondary);transition:color .2s}
.breadcrumb a:hover{color:var(--link)}
.breadcrumb .cur{color:#E2E8F0}
.breadcrumb .sep{color:rgba(255,255,255,.22)}

/* ===== Hero ===== */
.page-hero{
  position:relative;overflow:hidden;
  padding:64px 0 82px;
}
.page-hero-bg{
  position:absolute;inset:0;
  background:
    linear-gradient(105deg,rgba(11,18,32,.95) 12%,rgba(37,99,235,.42) 58%,rgba(11,18,32,.96) 84%),
    url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
}
.page-hero::after{
  content:"";position:absolute;inset:0;
  background:radial-gradient(circle at 83% 48%,rgba(56,189,248,.14),transparent 45%);
  pointer-events:none;
}
.page-hero-inner{
  position:relative;z-index:3;
  max-width:880px;
  padding:0 32px;
  margin:0 auto;
}
.breadcrumb{margin-bottom:20px}
.hero-title{
  font-size:42px;line-height:1.24;
  font-weight:700;letter-spacing:-.4px;
  color:#F8FAFC;
}
.hero-title .grad{
  background:linear-gradient(92deg,#38BDF8,#2DD4BF);
  -webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent;
}
.hero-desc{
  margin-top:20px;
  font-size:17px;line-height:1.85;
  color:var(--text-secondary);
  max-width:690px;
}
.hero-badges{
  display:flex;flex-wrap:wrap;gap:10px;
  margin-top:24px;
}
.badge{
  display:inline-flex;align-items:center;
  font-size:13px;color:#BAE6FD;
  background:rgba(56,189,248,.12);
  border:1px solid rgba(56,189,248,.26);
  border-radius:999px;padding:6px 14px;
}
.hero-actions{display:flex;gap:14px;margin-top:32px;flex-wrap:wrap}
.hero-orbit{
  position:absolute;right:6%;top:50%;z-index:2;
  width:230px;height:230px;
  transform:translateY(-50%);
  opacity:.9;
}
.orbit-ring{
  position:absolute;inset:0;
  border:1px solid rgba(56,189,248,.32);
  border-radius:50%;
  animation:rotate 24s linear infinite;
}
.orbit-ring::before{
  content:"";position:absolute;top:22px;left:50%;
  width:8px;height:8px;margin-left:-4px;border-radius:50%;
  background:var(--brand-accent);
  box-shadow:0 0 14px rgba(56,189,248,.95);
}
.orbit-ring:nth-child(2){
  inset:24px;
  border-color:rgba(45,212,191,.22);
  animation-duration:14s;
  animation-direction:reverse;
}
.orbit-core{
  position:absolute;left:50%;top:50%;
  width:26px;height:26px;
  transform:translate(-50%,-50%);
  border-radius:50%;
  background:#fff;
  box-shadow:0 0 26px rgba(56,189,248,.95),0 0 60px rgba(37,99,235,.7);
}
@keyframes rotate{to{transform:rotate(360deg)}}
@media(max-width:1180px){
  .hero-orbit{right:2%;opacity:.5}
}

/* ===== 通用区块 ===== */
.section{padding:var(--space) 0;position:relative}
.section-alt{background:rgba(17,28,46,.35);border-top:1px solid rgba(255,255,255,.05);border-bottom:1px solid rgba(255,255,255,.05)}
.section-head{max-width:780px;margin-bottom:40px}
.section-kicker{
  display:flex;align-items:center;gap:10px;
  font-size:14px;font-weight:600;color:var(--brand-accent);
  letter-spacing:1.5px;
}
.section-kicker i{
  width:24px;height:3px;border-radius:99px;
  background:var(--brand-accent);box-shadow:0 0 10px rgba(56,189,248,.6);
}
.section-title{
  position:relative;
  padding-left:22px;
  font-size:32px;line-height:1.32;font-weight:700;color:#F8FAFC;
  margin-top:12px;
}
.section-title::before{
  content:"";position:absolute;left:0;top:9px;
  width:4px;height:26px;border-radius:99px;
  background:var(--brand-accent);
  box-shadow:0 0 12px rgba(56,189,248,.65);
}
.section-sub{
  margin-top:14px;font-size:16px;color:var(--text-secondary);
  line-height:1.85;max-width:720px;
}

/* ===== 图文错落 ===== */
.split-row{
  display:grid;grid-template-columns:1.02fr .98fr;gap:54px;
  align-items:center;
}
.split-row.flip .split-media{order:2}
.split-media{
  position:relative;border-radius:20px;overflow:hidden;
  box-shadow:0 22px 54px rgba(0,0,0,.42);
  border:1px solid rgba(255,255,255,.1);
  transform:translateZ(0);
}
.split-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(11,18,32,0) 20%,rgba(11,18,32,.2) 100%);
}
.split-media img{width:100%;height:auto;min-height:260px;object-fit:cover}
.split-content h3{
  font-size:22px;line-height:1.5;font-weight:600;color:#F1F5F9;
  margin-bottom:14px;
}
.split-content p{
  color:var(--text-secondary);line-height:1.85;font-size:16px;
  margin-bottom:14px;
}
.split-content .lead{color:#CBD5E1;font-size:17px}
.chips{display:flex;flex-direction:column;gap:10px;margin-top:20px}
.chip{
  display:flex;align-items:center;gap:12px;
  background:rgba(255,255,255,.045);
  border:1px solid rgba(255,255,255,.08);
  border-radius:14px;padding:13px 16px;
}
.chip svg{width:18px;height:18px;flex:none;color:var(--success-accent)}
.chip strong{color:#E2E8F0;font-weight:600;margin-right:2px}
.chip em{font-style:normal;color:var(--text-secondary);font-size:14px}

/* ===== Feature Panel ===== */
.feature-panel{
  display:grid;grid-template-columns:1.08fr .92fr;
  border-radius:20px;overflow:hidden;
  background:linear-gradient(135deg,rgba(255,255,255,.09),rgba(255,255,255,.02));
  border:1px solid var(--glass-border);
  backdrop-filter:blur(18px);
  -webkit-backdrop-filter:blur(18px);
  box-shadow:var(--shadow);
}
.feature-main{
  padding:46px 42px;
  border-right:1px solid rgba(255,255,255,.09);
  display:flex;flex-direction:column;justify-content:center;
}
.feature-icon{
  width:52px;height:52px;border-radius:14px;
  display:flex;align-items:center;justify-content:center;
  background:rgba(37,99,235,.16);
  border:1px solid rgba(56,189,248,.25);
  margin-bottom:20px;
}
.feature-icon svg{width:26px;height:26px;color:#7DD3FC}
.feature-main h3{font-size:23px;margin-bottom:12px;color:#F1F5F9}
.feature-main p{color:var(--text-secondary);line-height:1.85;margin-bottom:16px}
.feature-tags{display:flex;gap:8px;flex-wrap:wrap;margin-top:8px}
.feature-tags span{
  font-size:12px;padding:4px 12px;border-radius:999px;
  color:#A5F3FC;background:rgba(45,212,191,.09);
  border:1px solid rgba(45,212,191,.22);
}
.feature-side{display:flex;flex-direction:column}
.feature-aside{
  padding:30px 32px;flex:1;
  display:flex;gap:16px;align-items:flex-start;
  transition:background .25s ease;
}
.feature-aside:first-child{border-bottom:1px solid rgba(255,255,255,.08)}
.feature-aside:hover{background:rgba(56,189,248,.05)}
.fa-num{
  color:var(--success-accent);font-weight:700;font-size:22px;
  line-height:1.2;min-width:42px;
}
.fa-body h4{font-size:17px;color:#E8EEF6;margin-bottom:7px;font-weight:600}
.fa-body p{font-size:14px;color:var(--text-secondary);line-height:1.7}

/* ===== Stats ===== */
.stats-section{
  position:relative;overflow:hidden;
  padding:60px 0;
  background:
    linear-gradient(rgba(11,18,32,.88),rgba(11,18,32,.9)),
    url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
  border-top:1px solid rgba(255,255,255,.05);
  border-bottom:1px solid rgba(255,255,255,.05);
}
.stats-grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:24px;
  max-width:960px;margin:0 auto;
}
.stat-item{
  background:rgba(255,255,255,.04);
  border:1px solid rgba(255,255,255,.08);
  border-radius:20px;
  padding:36px 22px;
  text-align:center;
  transition:transform .28s ease,background .28s ease;
}
.stat-item:hover{transform:translateY(-4px);background:rgba(255,255,255,.07)}
.stat-num{
  display:block;font-size:50px;font-weight:700;line-height:1.1;
  background:linear-gradient(90deg,#7DD3FC,#2DD4BF);
  -webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent;
}
.stat-label{
  display:block;margin-top:14px;color:var(--text-secondary);
  font-size:15px;letter-spacing:.5px;
}
.stat-note{
  text-align:center;color:var(--text-muted);font-size:13px;
  margin-top:20px;
}

/* ===== FAQ ===== */
.faq-wrap{max-width:900px;margin:0 auto}
.faq-item{
  background:rgba(255,255,255,.03);
  border:1px solid rgba(255,255,255,.08);
  border-radius:16px;
  margin-bottom:12px;
  overflow:hidden;
  transition:background .25s ease,border-color .25s ease;
}
.faq-item.open{
  background:rgba(37,99,235,.08);
  border-color:rgba(56,189,248,.3);
}
.faq-question{
  display:flex;align-items:center;gap:18px;
  width:100%;padding:20px 22px;
  text-align:left;border:0;background:transparent;
  color:#E8EEF6;font-size:16px;font-weight:500;
  line-height:1.6;cursor:pointer;
}
.faq-q-num{
  font-size:14px;font-weight:700;color:var(--brand-accent);
  width:32px;flex:none;
}
.faq-q-title{flex:1;min-width:0}
.faq-toggle{
  width:30px;height:30px;border-radius:50%;
  background:rgba(255,255,255,.08);flex:none;
  display:flex;align-items:center;justify-content:center;
  transition:.3s ease;
}
.faq-toggle svg{width:15px;height:15px;stroke:#CBD5E1;transition:transform .3s ease}
.faq-item.open .faq-toggle{background:rgba(56,189,248,.18)}
.faq-item.open .faq-toggle svg{transform:rotate(45deg);stroke:#E0F2FE}
.faq-answer{max-height:0;overflow:hidden;transition:max-height .3s ease}
.faq-answer p{
  padding:0 22px 22px 72px;
  color:var(--text-secondary);
  font-size:15px;line-height:1.85;
}
.faq-item.open .faq-answer p{color:#BFD3E6}

/* ===== CTA ===== */
.cta-section{padding:40px 0 90px}
.cta-panel{
  position:relative;
  border-radius:26px;
  padding:64px 60px;
  overflow:hidden;
  background:
    linear-gradient(100deg,rgba(11,18,32,.9) 20%,rgba(37,99,235,.5) 62%,rgba(11,18,32,.95) 90%),
    url('/assets/images/backpic/back-3.png') center/cover no-repeat;
  border:1px solid rgba(255,255,255,.14);
  box-shadow:0 24px 64px rgba(0,0,0,.4);
  display:flex;align-items:center;justify-content:space-between;gap:40px;
}
.cta-panel::after{
  content:"";position:absolute;inset:0;
  background:radial-gradient(circle at 80% 60%,rgba(45,212,191,.12),transparent 45%);
  pointer-events:none;
}
.cta-copy,.cta-actions{position:relative;z-index:2}
.cta-copy h2{
  font-size:30px;line-height:1.4;color:#F8FAFC;
  margin-bottom:14px;
}
.cta-copy p{color:var(--text-secondary);line-height:1.8;max-width:560px}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;flex:none}

/* ===== Footer ===== */
.footer{
  background:rgba(6,11,22,.75);
  border-top:1px solid rgba(255,255,255,.08);
  padding:58px 0 22px;
  margin-top:auto;
}
.footer-inner{
  max-width:var(--container);margin:0 auto;
  padding:0 32px;
  display:grid;grid-template-columns:1.4fr .85fr .85fr 1.1fr;
  gap:46px;
}
.footer-brand .brand-main{margin-bottom:12px}
.footer-brand h3{
  font-size:18px;color:#E8EEF6;font-weight:600;
  display:flex;align-items:center;margin-bottom:10px;
}
.footer-brand p{
  color:var(--text-muted);font-size:13px;line-height:1.85;
  max-width:300px;
}
.footer-title{font-size:16px;color:rgba(255,255,255,.85);font-weight:600;margin-bottom:16px}
.footer-links li{margin-bottom:9px}
.footer-links a{color:var(--text-muted);font-size:14px}
.footer-links a:hover{color:var(--brand-accent)}
.footer-contact{display:flex;flex-direction:column;gap:11px}
.footer-contact-row{
  display:flex;align-items:center;gap:8px;
  color:var(--text-muted);font-size:14px;
}
.footer-contact-row svg{
  width:16px;height:16px;color:#7D96B2;flex:none;stroke:currentColor;
}
.footer-bottom{
  margin-top:44px;padding-top:18px;
  border-top:1px solid rgba(255,255,255,.06);
  text-align:center;
  color:var(--text-muted);font-size:13px;
  display:flex;justify-content:center;gap:18px;flex-wrap:wrap;
}
.footer-bottom .footer-domain{color:#7D96B2}
.footer-bottom .footer-safety{width:100%;opacity:.75;font-size:12px}

/* ===== 回到顶部 ===== */
.back-top{
  position:fixed;right:18px;bottom:20px;z-index:80;
  width:44px;height:44px;border-radius:13px;
  background:rgba(37,99,235,.85);
  border:1px solid rgba(56,189,248,.4);
  color:#fff;
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 0 18px rgba(37,99,235,.35);
  opacity:0;visibility:hidden;transform:translateY(8px);
  transition:.3s ease;
}
.back-top.show{opacity:1;visibility:visible;transform:translateY(0)}
.back-top svg{width:20px;height:20px;stroke:#fff}
.back-top:hover{background:#2563EB}
.back-top:active{transform:scale(.96)}

/* ===== 响应式 ===== */
@media(max-width:1023px){
  :root{--space:56px}
  .sidebar{
    transform:translateX(-107%);
    transition:transform .3s ease;
    box-shadow:12px 0 40px rgba(0,0,0,.4);
  }
  .sidebar.open{transform:translateX(0)}
  .main-wrap{width:100%;margin-left:0}
  .mobile-bar{display:flex}
  .top-notice{margin-top:0}
  .split-row{gap:36px}
  .feature-panel{grid-template-columns:1fr}
  .feature-main{border-right:0;border-bottom:1px solid rgba(255,255,255,.09)}
  .stats-grid{gap:14px}
  .stat-item{padding:26px 14px}
  .stat-num{font-size:38px}
  .cta-panel{flex-direction:column;padding:42px 34px;text-align:left;align-items:flex-start}
  .footer-inner{grid-template-columns:1fr 1fr;gap:34px}
}
@media(max-width:767px){
  :root{--space:44px}
  .container,.page-hero-inner,.footer-inner{padding-left:18px;padding-right:18px}
  .notice-inner{padding-left:18px;padding-right:14px}
  .hero-title{font-size:29px}
  .hero-desc{font-size:16px}
  .hero-actions .btn{width:100%}
  .page-hero{padding:42px 0 58px}
  .split-row{grid-template-columns:1fr;gap:26px}
  .split-row.flip .split-media{order:0}
  .section-title{font-size:24px}
  .section-sub{font-size:15px}
  .feature-main{padding:32px 24px}
  .feature-aside{padding:24px}
  .feature-panel .feature-tags span{margin-bottom:4px}
  .stats-grid{grid-template-columns:1fr}
  .cta-section{padding-bottom:54px}
  .cta-panel{padding:30px 22px}
  .cta-copy h2{font-size:22px}
  .cta-actions{width:100%}
  .cta-actions .btn{width:100%}
  .faq-item .faq-question{padding:16px 14px;gap:12px;align-items:flex-start}
  .faq-q-num{width:auto}
  .faq-answer p{padding:0 14px 18px 30px}
  .footer-inner{grid-template-columns:1fr;gap:30px}
  .footer-bottom{gap:8px 12px}
  .back-top{right:12px;bottom:14px}
}

/* roulang page: category2 */
:root {
            --font-sans: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            --font-num: Inter, "Segoe UI", Roboto, sans-serif;
            --bg-base: #0B1220;
            --bg-elevated: #111C2E;
            --bg-deep: #0A101D;
            --glass-bg: rgba(255, 255, 255, 0.06);
            --glass-bg-hover: rgba(255, 255, 255, 0.1);
            --glass-border: rgba(255, 255, 255, 0.12);
            --text-primary: #F1F5F9;
            --text-secondary: #94A3B8;
            --text-muted: #64748B;
            --brand-primary: #2563EB;
            --brand-accent: #38BDF8;
            --success-accent: #2DD4BF;
            --warn: #F59E0B;
            --danger: #F43F5E;
            --link: #7DD3FC;
            --radius-lg: 16px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --radius-pill: 999px;
            --shadow-card: 0 4px 16px rgba(0, 0, 0, 0.18);
            --shadow-float: 0 8px 24px rgba(0, 0, 0, 0.28);
            --glow-blue: 0 0 20px rgba(37, 99, 235, 0.45);
            --sidebar-w: 260px;
        }

        *,
        *::before,
        *::after {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.75;
            background: var(--bg-base);
            color: var(--text-primary);
            -webkit-font-smoothing: antialiased;
        }

        img {
            display: block;
            max-width: 100%;
        }

        a {
            color: inherit;
            text-decoration: none;
        }

        button {
            font: inherit;
            color: inherit;
            border: 0;
            background: none;
            cursor: pointer;
        }

        ul,
        ol {
            list-style: none;
        }

        a:focus-visible,
        button:focus-visible,
        summary:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--brand-accent);
            outline-offset: 3px;
            border-radius: 6px;
        }

        ::selection {
            background: rgba(37, 99, 235, 0.5);
            color: #fff;
        }

        .page-accent {
            color: var(--brand-accent);
        }

        .container {
            max-width: 1180px;
            margin: 0 auto;
            padding: 0 32px;
        }

        .section {
            padding: 70px 0 0;
        }

        .section-head {
            margin-bottom: 36px;
        }

        .section-head h2 {
            position: relative;
            font-size: 28px;
            line-height: 1.35;
            font-weight: 700;
            padding-left: 20px;
            letter-spacing: 0.02em;
            color: #fff;
        }

        .section-head h2::before {
            content: "";
            position: absolute;
            left: 0;
            top: 0.18em;
            width: 4px;
            height: 0.72em;
            border-radius: 2px;
            background: linear-gradient(180deg, var(--brand-accent), var(--success-accent));
            box-shadow: 0 0 12px rgba(56, 189, 248, 0.7);
        }

        .section-head p {
            margin-top: 14px;
            max-width: 760px;
            color: var(--text-secondary);
            font-size: 15px;
        }

        .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 14px;
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-pill);
            background: rgba(37, 99, 235, 0.14);
            color: #dbeafe;
            font-size: 13px;
            letter-spacing: 0.04em;
        }

        .eyebrow::before {
            content: "";
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--success-accent);
            box-shadow: 0 0 0 0 rgba(45, 212, 191, 0.6);
            animation: pulse 2.4s infinite;
        }

        @keyframes pulse {
            0%, 100% {
                box-shadow: 0 0 0 0 rgba(45, 212, 191, 0.45);
            }
            50% {
                box-shadow: 0 0 0 7px rgba(45, 212, 191, 0);
            }
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            min-height: 46px;
            padding: 0 28px;
            border-radius: var(--radius-md);
            font-size: 15px;
            font-weight: 600;
            line-height: 1;
            border: 1px solid transparent;
            transition: all 0.24s ease;
        }

        .btn-primary {
            background: linear-gradient(135deg, #2563EB, #1D4ED8);
            color: #fff;
            box-shadow: 0 4px 14px rgba(37, 99, 235, 0.35);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: var(--glow-blue), 0 12px 26px rgba(37, 99, 235, 0.22);
            border-color: rgba(255, 255, 255, 0.15);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 0 12px rgba(37, 99, 235, 0.4);
        }

        .btn-ghost {
            background: rgba(255, 255, 255, 0.06);
            border-color: rgba(255, 255, 255, 0.22);
            color: #E2E8F0;
            backdrop-filter: blur(10px);
        }

        .btn-ghost:hover {
            background: rgba(255, 255, 255, 0.13);
            border-color: rgba(255, 255, 255, 0.32);
            transform: translateY(-2px);
        }

        .btn-ghost:active {
            transform: translateY(0);
        }

        .btn-sm {
            min-height: 38px;
            padding: 0 18px;
            font-size: 13px;
        }

        .text-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--link);
            font-weight: 500;
            transition: color 0.2s ease, transform 0.2s ease;
        }

        .text-link svg {
            width: 16px;
            height: 16px;
            transition: transform 0.2s ease;
        }

        .text-link:hover {
            color: var(--brand-accent);
        }

        .text-link:hover svg {
            transform: translateX(4px);
        }

        .glass-card {
            background: linear-gradient(135deg, rgba(255, 255, 255, 0.1), rgba(255, 255, 255, 0.02));
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
        }

        .badge-pill {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            padding: 5px 12px;
            background: rgba(45, 212, 191, 0.1);
            border: 1px solid rgba(45, 212, 191, 0.25);
            color: #b8fff5;
            font-size: 12px;
            border-radius: var(--radius-pill);
        }

        .site-shell {
            min-height: 100vh;
        }

        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            z-index: 100;
            width: var(--sidebar-w);
            height: 100vh;
            display: flex;
            flex-direction: column;
            background: #0F172A;
            border-right: 1px solid #1E293B;
            overflow: hidden;
        }

        .sidebar-brand {
            padding: 26px 18px 14px;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .brand-lockup {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .brand-mark {
            flex: 0 0 auto;
            position: relative;
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 10px;
            background: rgba(37, 99, 235, 0.16);
            border: 1px solid rgba(56, 189, 248, 0.3);
        }

        .brand-mark i {
            display: block;
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background: var(--success-accent);
            box-shadow: 0 0 12px var(--success-accent);
        }

        .brand-mark::after {
            content: "";
            position: absolute;
            inset: -4px;
            border-radius: 12px;
            border: 1px solid rgba(56, 189, 248, 0.16);
        }

        .brand-text {
            display: flex;
            flex-direction: column;
            line-height: 1.25;
            gap: 2px;
        }

        .brand-name {
            font-size: 17px;
            font-weight: 700;
            color: #f8fafc;
            letter-spacing: 0.02em;
        }

        .brand-sub {
            font-size: 11px;
            color: var(--text-muted);
            font-family: var(--font-num);
            letter-spacing: 0.01em;
        }

        .sidebar-nav {
            flex: 0 1 auto;
            overflow-y: auto;
            padding: 8px 12px 10px;
        }

        .sidebar-nav::-webkit-scrollbar {
            width: 4px;
        }

        .sidebar-nav::-webkit-scrollbar-thumb {
            background: rgba(255, 255, 255, 0.12);
            border-radius: 4px;
        }

        .nav-caption {
            padding: 13px 10px 8px;
            font-size: 12px;
            letter-spacing: 0.08em;
            color: var(--text-muted);
            text-transform: uppercase;
        }

        .nav-list {
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .nav-link {
            position: relative;
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 11px 14px;
            color: #8ca0b8;
            font-size: 15px;
            font-weight: 500;
            border-radius: 10px;
            border-left: 3px solid transparent;
            transition: background 0.2s ease, color 0.2s ease;
        }

        .nav-link svg {
            width: 20px;
            height: 20px;
            flex: 0 0 auto;
            stroke: currentColor;
        }

        .nav-link:hover {
            color: #e2e8f0;
            background: rgba(255, 255, 255, 0.05);
        }

        .nav-link.active {
            background: linear-gradient(90deg, rgba(37, 99, 235, 0.28), rgba(37, 99, 235, 0.06));
            color: #fff;
            border-left-color: var(--brand-accent);
            box-shadow: inset 0 0 24px rgba(37, 99, 235, 0.12);
        }

        .nav-link.active::after {
            content: "";
            position: absolute;
            right: 8px;
            top: 50%;
            width: 5px;
            height: 5px;
            border-radius: 50%;
            background: var(--brand-accent);
            box-shadow: 0 0 10px var(--brand-accent);
            transform: translateY(-50%);
        }

        .sidebar-foot {
            margin-top: auto;
            padding: 16px 14px 18px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
        }

        .sidebar-meta {
            display: flex;
            gap: 8px;
            font-size: 12px;
            color: var(--text-muted);
            line-height: 1.7;
            background: rgba(255, 255, 255, 0.02);
            padding: 10px 12px;
            border-radius: 10px;
            border: 1px solid rgba(255, 255, 255, 0.06);
        }

        .sidebar-meta svg {
            flex: 0 0 auto;
            width: 17px;
            height: 17px;
            margin-top: 2px;
            stroke: var(--brand-accent);
        }

        .backdrop {
            position: fixed;
            inset: 0;
            z-index: 95;
            background: rgba(2, 6, 18, 0.68);
            backdrop-filter: blur(2px);
            opacity: 0;
            visibility: hidden;
            transition: 0.28s ease;
        }

        .main-wrap {
            margin-left: var(--sidebar-w);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        .topbar {
            display: none;
        }

        .crumb-line {
            padding: 16px 0 6px;
            font-size: 13.5px;
            color: var(--text-secondary);
        }

        .crumb-line a {
            color: var(--text-secondary);
            transition: color 0.2s ease;
        }

        .crumb-line a:hover {
            color: var(--brand-accent);
        }

        .crumb-line .sep {
            display: inline-block;
            margin: 0 10px;
            color: #46576b;
        }

        .hero {
            position: relative;
            overflow: hidden;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            background:
                linear-gradient(105deg, rgba(11, 18, 32, 0.98) 8%, rgba(17, 28, 46, 0.88) 52%, rgba(11, 18, 32, 0.96) 96%),
                url('/assets/images/backpic/back-1.webp') center / cover no-repeat;
        }

        .hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: radial-gradient(circle at 82% 30%, rgba(37, 99, 235, 0.2), transparent 48%);
            pointer-events: none;
        }

        .hero-inner {
            position: relative;
            z-index: 2;
            padding: 62px 0 76px;
            display: grid;
            grid-template-columns: 1.8fr 1fr;
            gap: 28px;
            align-items: center;
        }

        .hero h1 {
            max-width: 760px;
            font-size: 40px;
            line-height: 1.22;
            font-weight: 700;
            letter-spacing: 0.02em;
            color: #fff;
            margin-top: 20px;
        }

        .hero h1 .grad-text {
            background: linear-gradient(90deg, var(--brand-accent), var(--success-accent));
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }

        .hero-lead {
            max-width: 640px;
            margin: 20px 0 22px;
            font-size: 16px;
            line-height: 1.9;
            color: #cbd5e1;
        }

        .hero-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-bottom: 28px;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
        }

        .hero-ring {
            position: relative;
            width: 300px;
            height: 300px;
            margin: 0 auto;
            border-radius: 50%;
            border: 1px solid rgba(56, 189, 248, 0.28);
            background: radial-gradient(circle, rgba(37, 99, 235, 0.18), rgba(11, 18, 32, 0.4) 60%, transparent 72%);
        }

        .hero-ring::before,
        .hero-ring::after {
            content: "";
            position: absolute;
            border-radius: 50%;
        }

        .hero-ring::before {
            inset: 18px;
            border: 1px dashed rgba(56, 189, 248, 0.3);
            animation: spin 32s linear infinite;
        }

        .hero-ring::after {
            inset: 48px;
            border: 1px solid rgba(45, 212, 191, 0.25);
            box-shadow: 0 0 40px rgba(45, 212, 191, 0.1);
        }

        .ring-core {
            position: absolute;
            top: 50%;
            left: 50%;
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background: var(--success-accent);
            box-shadow: 0 0 0 10px rgba(45, 212, 191, 0.16), 0 0 30px var(--success-accent);
            transform: translate(-50%, -50%);
            animation: glow 2.2s ease-in-out infinite;
        }

        .ring-node {
            position: absolute;
            top: 50%;
            left: 50%;
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--brand-accent);
            box-shadow: 0 0 14px var(--brand-accent);
            transform-origin: 140px center;
        }

        .ring-node:nth-child(1) {
            transform: rotate(0deg) translateX(138px) scale(1);
        }
        .ring-node:nth-child(2) {
            transform: rotate(72deg) translateX(138px) scale(0.7);
        }
        .ring-node:nth-child(3) {
            transform: rotate(144deg) translateX(138px) scale(1.15);
        }
        .ring-node:nth-child(4) {
            transform: rotate(216deg) translateX(138px) scale(0.85);
        }
        .ring-node:nth-child(5) {
            transform: rotate(288deg) translateX(138px) scale(0.65);
        }

        @keyframes spin {
            to {
                transform: rotate(360deg);
            }
        }

        .content-area {
            padding: 54px 0 76px;
        }

        .stats-line {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
            margin-bottom: 50px;
        }

        .stat-card {
            padding: 20px 18px;
            border-radius: 14px;
            background: rgba(255, 255, 255, 0.045);
            border: 1px solid rgba(255, 255, 255, 0.08);
            transition: background 0.25s ease, border 0.25s ease;
        }

        .stat-card:hover {
            background: rgba(37, 99, 235, 0.08);
            border-color: rgba(56, 189, 248, 0.25);
        }

        .stat-num {
            font-family: var(--font-num);
            font-size: 24px;
            line-height: 1.2;
            font-weight: 700;
            color: #e0f2fe;
            margin-bottom: 6px;
        }

        .stat-label {
            font-size: 13px;
            color: var(--text-secondary);
        }

        .module-block {
            display: grid;
            grid-template-columns: 1.75fr 1fr;
            gap: 22px;
            align-items: stretch;
        }

        .focus-panel {
            position: relative;
            border-radius: 20px;
            overflow: hidden;
            border: 1px solid var(--glass-border);
            background: linear-gradient(145deg, rgba(255, 255, 255, 0.09), rgba(255, 255, 255, 0.02));
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            display: flex;
            flex-direction: column;
        }

        .focus-panel .focus-img {
            position: relative;
            overflow: hidden;
            min-height: 225px;
        }

        .focus-panel .focus-img img {
            width: 100%;
            height: 225px;
            object-fit: cover;
        }

        .focus-img::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(11, 18, 32, 0.1), rgba(11, 18, 32, 0.88));
        }

        .focus-panel-body {
            position: relative;
            padding: 22px 24px 26px;
            z-index: 2;
        }

        .focus-panel-body .tag-chip {
            display: inline-flex;
            padding: 5px 12px;
            background: rgba(37, 99, 235, 0.16);
            border: 1px solid rgba(56, 189, 248, 0.24);
            color: var(--brand-accent);
            border-radius: 999px;
            font-size: 12px;
            margin-bottom: 12px;
        }

        .focus-panel h3 {
            font-size: 23px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 8px;
        }

        .focus-panel p {
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.8;
        }

        .feature-list {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 10px;
            margin-top: 18px;
        }

        .feature-item {
            display: flex;
            align-items: center;
            gap: 9px;
            padding: 9px 12px;
            border-radius: 10px;
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid rgba(255, 255, 255, 0.06);
            color: #dbe4ef;
            font-size: 14px;
        }

        .feature-item svg {
            width: 17px;
            height: 17px;
            flex: 0 0 auto;
            stroke: var(--success-accent);
        }

        .support-stack {
            display: flex;
            flex-direction: column;
            gap: 18px;
        }

        .mini-panel {
            flex: 1;
            padding: 22px;
            border-radius: 18px;
            border: 1px solid var(--glass-border);
            background: linear-gradient(145deg, rgba(255, 255, 255, 0.07), rgba(255, 255, 255, 0.015));
            transition: background 0.25s ease, transform 0.25s ease;
        }

        .mini-panel:hover {
            background: rgba(37, 99, 235, 0.07);
            transform: translateY(-2px);
        }

        .mini-panel h4 {
            display: flex;
            align-items: center;
            gap: 10px;
            color: #f1f5f9;
            font-size: 16px;
            font-weight: 600;
        }

        .mini-panel h4 svg {
            width: 21px;
            height: 21px;
            stroke: var(--brand-accent);
        }

        .mini-panel p {
            margin-top: 10px;
            color: var(--text-secondary);
            font-size: 14px;
            line-height: 1.75;
        }

        .process-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 18px;
        }

        .step-card {
            position: relative;
            padding: 28px 22px 24px;
            border-radius: 16px;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.08);
            overflow: hidden;
            transition: border 0.25s ease, background 0.25s ease, transform 0.25s ease;
        }

        .step-card:hover {
            background: rgba(37, 99, 235, 0.07);
            border-color: rgba(56, 189, 248, 0.28);
            transform: translateY(-3px);
        }

        .step-card::before {
            content: attr(data-step);
            position: absolute;
            top: -14px;
            right: 6px;
            font-family: var(--font-num);
            font-size: 72px;
            font-weight: 800;
            color: rgba(56, 189, 248, 0.08);
        }

        .step-card .step-ico {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            margin-bottom: 18px;
            border-radius: 12px;
            background: rgba(37, 99, 235, 0.16);
            border: 1px solid rgba(56, 189, 248, 0.24);
        }

        .step-card .step-ico svg {
            width: 22px;
            height: 22px;
            stroke: var(--brand-accent);
        }

        .step-card h3 {
            position: relative;
            font-size: 17px;
            color: #fff;
            font-weight: 600;
            margin-bottom: 8px;
        }

        .step-card p {
            color: var(--text-secondary);
            font-size: 14px;
            line-height: 1.8;
        }

        .scene-wrap {
            display: grid;
            grid-template-columns: 0.9fr 1.1fr;
            border-radius: 20px;
            overflow: hidden;
            border: 1px solid var(--glass-border);
            background: linear-gradient(145deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.01));
        }

        .scene-flow-img {
            min-height: 340px;
            overflow: hidden;
        }

        .scene-flow-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            filter: saturate(0.88);
        }

        .scene-list {
            display: flex;
            flex-direction: column;
            gap: 6px;
            padding: 30px 26px;
        }

        .scene-list .scene-title {
            font-size: 16px;
            color: #fff;
            font-weight: 600;
            padding-bottom: 8px;
        }

        .scene-line {
            display: flex;
            gap: 12px;
            padding: 15px 12px;
            border-radius: 12px;
            transition: background 0.2s ease;
        }

        .scene-line:hover {
            background: rgba(255, 255, 255, 0.04);
        }

        .scene-line svg {
            flex: 0 0 auto;
            width: 20px;
            height: 20px;
            margin-top: 3px;
            stroke: var(--success-accent);
        }

        .scene-line strong {
            display: block;
            color: #e8eef5;
            font-size: 15px;
            font-weight: 600;
        }

        .scene-line span {
            color: var(--text-secondary);
            font-size: 14px;
            line-height: 1.7;
        }

        .guide-catalog {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 16px;
        }

        .guide-chunk {
            display: grid;
            grid-template-columns: 130px 1fr;
            gap: 18px;
            padding: 14px;
            border-radius: 18px;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.08);
            transition: background 0.25s ease, border-color 0.25s ease;
        }

        .guide-chunk:hover {
            background: rgba(37, 99, 235, 0.07);
            border-color: rgba(56, 189, 248, 0.3);
        }

        .guide-chunk-img {
            overflow: hidden;
            border-radius: 12px;
            min-height: 104px;
            background: rgba(255, 255, 255, 0.02);
        }

        .guide-chunk-img img {
            width: 100%;
            height: 104px;
            object-fit: cover;
        }

        .guide-chunk-body {
            display: flex;
            flex-direction: column;
            align-items: flex-start;
            justify-content: center;
        }

        .guide-chunk-body h3 {
            font-size: 17px;
            font-weight: 600;
            color: #f8fafc;
            margin-bottom: 4px;
        }

        .guide-chunk-body p {
            color: var(--text-secondary);
            font-size: 13px;
            line-height: 1.65;
            margin-bottom: 9px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .guide-chunk-body .mini-tag {
            display: inline-flex;
            font-size: 12px;
            color: var(--link);
            align-items: center;
            gap: 5px;
        }

        .faq-area {
            max-width: 880px;
        }

        .faq-item {
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-left: 3px solid transparent;
            border-radius: 14px;
            margin-bottom: 12px;
            overflow: hidden;
            transition: background 0.25s ease, border 0.25s ease;
        }

        .faq-item[open] {
            background: rgba(37, 99, 235, 0.08);
            border-left-color: var(--brand-accent);
        }

        .faq-item summary {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 18px;
            list-style: none;
            cursor: pointer;
            padding: 20px 22px;
            font-size: 16px;
            font-weight: 600;
            color: #e2e8f0;
        }

        .faq-item summary::-webkit-details-marker {
            display: none;
        }

        .faq-num {
            flex: 0 0 auto;
            font-family: var(--font-num);
            font-size: 13px;
            font-weight: 700;
            color: var(--brand-accent);
            margin-right: 4px;
        }

        .faq-text {
            flex: 1;
        }

        .faq-icon {
            flex: 0 0 auto;
            width: 30px;
            height: 30px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 8px;
            border: 1px solid rgba(255, 255, 255, 0.14);
            background: rgba(255, 255, 255, 0.04);
            transition: transform 0.25s ease, border-color 0.25s ease;
        }

        .faq-item[open] .faq-icon {
            transform: rotate(45deg);
            border-color: var(--brand-accent);
            background: rgba(37, 99, 235, 0.18);
        }

        .faq-icon svg {
            width: 15px;
            height: 15px;
            stroke: #dbeafe;
        }

        .faq-answer {
            padding: 0 22px 20px;
            color: var(--text-secondary);
            font-size: 14.5px;
            line-height: 1.9;
        }

        .faq-note {
            margin-top: 20px;
            color: var(--text-muted);
            font-size: 13px;
        }

        .cta-section {
            padding: 80px 0 70px;
        }

        .cta-band {
            position: relative;
            overflow: hidden;
            border-radius: 22px;
            background:
                linear-gradient(100deg, rgba(11, 18, 32, 0.96), rgba(30, 60, 114, 0.84)),
                url('/assets/images/backpic/back-2.webp') center / cover no-repeat;
            border: 1px solid rgba(56, 189, 248, 0.16);
            padding: 64px 40px;
            text-align: center;
        }

        .cta-band::before {
            content: "";
            position: absolute;
            width: 280px;
            height: 280px;
            right: -80px;
            top: -80px;
            border-radius: 50%;
            border: 1px solid rgba(56, 189, 248, 0.26);
            box-shadow: 0 0 0 24px rgba(37, 99, 235, 0.08);
        }

        .cta-band h2 {
            font-size: 30px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
        }

        .cta-band p {
            max-width: 680px;
            margin: 0 auto 28px;
            color: #b4c6da;
            font-size: 15px;
        }

        .cta-btns {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 14px;
        }

        .footer {
            background: #0A101D;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 58px 0 22px;
        }

        .footer-inner {
            max-width: 1180px;
            margin: 0 auto;
            padding: 0 32px;
            display: grid;
            grid-template-columns: 1.6fr 0.9fr 0.9fr 1.2fr;
            gap: 32px;
        }

        .footer-brand h3 {
            display: flex;
            align-items: center;
            gap: 9px;
            color: #f1f5f9;
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 14px;
        }

        .footer-brand .brand-pin {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 26px;
            height: 26px;
            border-radius: 8px;
            background: rgba(37, 99, 235, 0.2);
            border: 1px solid rgba(56, 189, 248, 0.26);
        }

        .footer-brand .brand-pin i {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--success-accent);
            box-shadow: 0 0 10px var(--success-accent);
        }

        .footer-brand p {
            color: var(--text-muted);
            font-size: 14px;
            line-height: 1.9;
            max-width: 380px;
        }

        .footer-title {
            color: #dce4ee;
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 16px;
        }

        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-links a {
            color: var(--text-secondary);
            font-size: 14px;
            transition: color 0.22s ease, padding-left 0.22s ease;
        }

        .footer-links a:hover {
            color: var(--brand-accent);
            padding-left: 4px;
        }

        .footer-contact {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .footer-contact-row {
            display: flex;
            align-items: center;
            gap: 9px;
            color: var(--text-secondary);
            font-size: 14px;
            line-height: 1.6;
        }

        .footer-contact-row svg {
            width: 17px;
            height: 17px;
            flex: 0 0 auto;
            stroke: var(--brand-accent);
        }

        .footer-bottom {
            max-width: 1180px;
            margin: 42px auto 0;
            padding: 22px 32px 0;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            display: flex;
            flex-wrap: wrap;
            gap: 8px 18px;
            justify-content: space-between;
            color: var(--text-muted);
            font-size: 13px;
        }

        .footer-domain {
            color: #748399;
        }

        .footer-safety {
            color: #4d5c6e;
        }

        @media (max-width: 640px) {
            .module-block {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 1023px) {
            .sidebar {
                transform: translateX(-100%);
                width: 280px;
                box-shadow: 16px 0 40px rgba(0, 0, 0, 0.35);
                transition: transform 0.3s ease;
            }

            .sidebar.open {
                transform: translateX(0);
            }

            .backdrop.show {
                opacity: 1;
                visibility: visible;
            }

            .main-wrap {
                margin-left: 0;
            }

            .topbar {
                display: flex;
                position: sticky;
                top: 0;
                z-index: 90;
                height: 62px;
                align-items: center;
                gap: 12px;
                padding: 0 16px;
                background: rgba(13, 21, 38, 0.92);
                backdrop-filter: blur(14px);
                -webkit-backdrop-filter: blur(14px);
                border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            }

            .hamburger {
                display: flex;
                align-items: center;
                justify-content: center;
                width: 42px;
                height: 42px;
                border-radius: 10px;
                border: 1px solid rgba(255, 255, 255, 0.14);
                background: rgba(255, 255, 255, 0.04);
                transition: background 0.2s ease;
            }

            .hamburger:hover {
                background: rgba(255, 255, 255, 0.1);
            }

            .hamburger svg {
                width: 21px;
                height: 21px;
                stroke: #dbeafe;
            }

            .mobile-brand {
                display: flex;
                align-items: center;
                gap: 8px;
                overflow: hidden;
                min-width: 0;
            }

            .mobile-brand .mb-dot {
                flex: 0 0 auto;
                width: 9px;
                height: 9px;
                border-radius: 50%;
                background: var(--success-accent);
                box-shadow: 0 0 10px var(--success-accent);
            }

            .mobile-brand span {
                font-size: 16px;
                color: #fff;
                font-weight: 700;
                white-space: nowrap;
                overflow: hidden;
                text-overflow: ellipsis;
            }

            .hero-inner {
                grid-template-columns: 1fr;
                gap: 34px;
            }

            .hero-ring {
                width: 230px;
                height: 230px;
            }

            .ring-node {
                transform-origin: 115px center;
            }

            .stats-line {
                grid-template-columns: repeat(2, 1fr);
            }

            .module-block {
                grid-template-columns: 1fr;
            }

            .support-stack {
                display: grid;
                grid-template-columns: 1fr 1fr;
            }

            .process-steps {
                grid-template-columns: repeat(2, 1fr);
            }

            .scene-wrap {
                grid-template-columns: 1fr;
            }

            .scene-flow-img {
                min-height: 220px;
            }

            .guide-catalog {
                grid-template-columns: 1fr;
            }

            .footer-inner {
                grid-template-columns: 1fr 1fr;
            }

            .footer-brand {
                grid-column: 1 / -1;
            }
        }

        @media (max-width: 767px) {
            .section {
                padding-top: 48px;
            }

            .section-head h2 {
                font-size: 23px;
                line-height: 1.4;
            }

            .container,
            .footer-inner,
            .footer-bottom {
                padding-left: 20px;
                padding-right: 20px;
            }

            .crumb-line {
                font-size: 13px;
                padding: 14px 0 4px;
            }

            .hero-inner {
                padding: 40px 0 52px;
            }

            .hero h1 {
                font-size: 29px;
                line-height: 1.28;
            }

            .hero-lead {
                font-size: 15px;
            }

            .hero-actions .btn {
                flex: 1 1 100%;
            }

            .hero-ring {
                width: 196px;
                height: 196px;
            }

            .ring-node {
                transform-origin: 98px center;
            }

            .content-area {
                padding-top: 38px;
                padding-bottom: 50px;
            }

            .support-stack {
                display: flex;
                flex-direction: column;
            }

            .process-steps {
                grid-template-columns: 1fr;
            }

            .step-card {
                padding: 22px 18px 18px;
            }

            .guide-chunk {
                grid-template-columns: 1fr;
                gap: 12px;
            }

            .guide-chunk-img {
                min-height: 180px;
            }

            .guide-chunk-img img {
                height: 180px;
            }

            .scene-list {
                padding: 22px 18px;
            }

            .cta-band {
                padding: 44px 20px;
                border-radius: 18px;
            }

            .cta-band h2 {
                font-size: 24px;
            }

            .cta-band p {
                font-size: 14px;
            }

            .cta-btns .btn {
                width: 100%;
            }

            .footer {
                padding-top: 40px;
            }

            .footer-inner {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .footer-brand {
                grid-column: auto;
            }

            .footer-bottom {
                flex-direction: column;
                margin-top: 30px;
                padding-bottom: 22px;
            }
        }

        @media (max-width: 380px) {
            .mobile-brand span {
                max-width: 180px;
            }
        }

/* roulang page: category3 */
:root {
  --bg-base: #0B1220;
  --bg-elevated: #111C2E;
  --glass-bg: rgba(255,255,255,0.06);
  --glass-border: rgba(255,255,255,0.12);
  --text-primary: #F1F5F9;
  --text-secondary: #94A3B8;
  --text-muted: #64748B;
  --brand-primary: #2563EB;
  --brand-deep: #1D4ED8;
  --brand-accent: #38BDF8;
  --success-accent: #2DD4BF;
  --warning: #F59E0B;
  --danger: #F43F5E;
  --link: #7DD3FC;
  --sidebar-w: 260px;
  --radius-card: 16px;
  --radius-btn: 12px;
  --radius-input: 14px;
  --radius-tag: 999px;
  --shadow-soft: 0 8px 24px rgba(0,0,0,0.25);
  --shadow-glass: 0 4px 16px rgba(0,0,0,0.18);
  --glow-blue: 0 0 20px rgba(37,99,235,0.45);
  --font-sans: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}
* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}
body {
  margin: 0;
  background: var(--bg-base);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.7;
  font-size: 16px;
}
a {
  color: var(--link);
  text-decoration: none;
  transition: color 0.2s ease;
}
img {
  max-width: 100%;
  display: block;
}
button {
  font-family: inherit;
}
h1, h2, h3, h4, p, ul, ol, dl, dd {
  margin: 0;
}
ul, ol {
  padding: 0;
  list-style: none;
}
:focus-visible {
  outline: 2px solid var(--brand-accent);
  outline-offset: 2px;
}

/* Layout */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--sidebar-w);
  height: 100vh;
  display: flex;
  flex-direction: column;
  background: #0F172A;
  border-right: 1px solid #1E293B;
  z-index: 200;
  overflow-y: auto;
}
.sidebar-overlay {
  display: none;
}
.brand-head {
  padding: 26px 20px 18px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  color: #fff;
}
.brand-mark {
  position: relative;
  flex: 0 0 42px;
  height: 42px;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(37,99,235,0.9), rgba(14,45,102,0.8));
  border: 1px solid rgba(56,189,248,0.45);
  box-shadow: 0 0 16px rgba(56,189,248,0.28);
}
.brand-mark::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 12px;
  height: 12px;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  background: radial-gradient(circle, #fff, var(--brand-accent) 45%, transparent 70%);
  box-shadow: 0 0 10px rgba(56,189,248,0.9);
}
.brand-logo-name {
  font-size: 17px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--text-primary);
}
.brand-logo-domain {
  display: block;
  margin-top: 3px;
  font-size: 12px;
  font-weight: 400;
  line-height: 1.2;
  color: var(--text-muted);
  letter-spacing: 0.02em;
}
.sidebar-nav {
  padding: 10px 0;
}
.nav-caption {
  padding: 10px 22px 8px;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.12em;
  color: var(--text-muted);
}
.nav-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.nav-item {
  position: relative;
  padding: 0 12px;
}
.nav-link {
  position: relative;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 13px 12px;
  border-radius: 10px;
  color: var(--text-secondary);
  font-size: 15px;
  font-weight: 500;
  transition: background 0.2s ease, color 0.2s ease;
}
.nav-link svg {
  width: 20px;
  height: 20px;
  stroke: currentColor;
  flex: 0 0 20px;
}
.nav-link:hover {
  color: #fff;
  background: rgba(255,255,255,0.045);
}
.nav-link.active {
  color: #fff;
  background: linear-gradient(90deg, rgba(37,99,235,0.28), rgba(56,189,248,0.04));
}
.nav-link.active::before {
  content: "";
  position: absolute;
  left: 0;
  top: 13px;
  bottom: 13px;
  width: 3px;
  border-radius: 4px;
  background: linear-gradient(180deg, var(--brand-accent), var(--brand-primary));
  box-shadow: 0 0 12px rgba(56,189,248,0.6);
}
.sidebar-help {
  margin-top: auto;
  padding: 16px 20px 22px;
  border-top: 1px solid rgba(255,255,255,0.06);
  font-size: 13px;
  color: var(--text-secondary);
}
.sidebar-help span {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 5px;
}
.sidebar-help span svg {
  width: 16px;
  height: 16px;
  stroke: currentColor;
  flex: 0 0 16px;
}
.top-header {
  display: none;
}
.main-wrap {
  margin-left: var(--sidebar-w);
  min-height: 100vh;
  padding-bottom: 0;
  background:
    radial-gradient(circle at 78% 8%, rgba(37,99,235,0.1), transparent 26%),
    radial-gradient(circle at 18% 55%, rgba(13,148,136,0.06), transparent 28%),
    var(--bg-base);
}
.shell {
  max-width: 1280px;
  margin: 0 auto;
  padding: 24px 40px 40px;
}

/* Breadcrumb */
.crumbs {
  padding: 14px 4px 18px;
  font-size: 14px;
  color: var(--text-secondary);
}
.crumbs a {
  color: var(--text-secondary);
  transition: color 0.2s ease;
}
.crumbs a:hover {
  color: var(--brand-accent);
}
.crumbs .cur {
  color: var(--text-primary);
  font-weight: 500;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: var(--radius-btn);
  border: 1px solid transparent;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.2;
  cursor: pointer;
  text-align: center;
  transition: all 0.2s ease;
}
.btn-primary {
  background: linear-gradient(135deg, var(--brand-primary), var(--brand-deep));
  color: #fff;
  box-shadow: 0 4px 16px rgba(37,99,235,0.28);
}
.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: var(--glow-blue);
  color: #fff;
}
.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 0 12px rgba(37,99,235,0.5);
}
.btn-ghost {
  background: rgba(255,255,255,0.06);
  color: #E2E8F0;
  border-color: rgba(255,255,255,0.18);
}
.btn-ghost:hover {
  background: rgba(255,255,255,0.12);
  border-color: rgba(255,255,255,0.28);
  color: #fff;
}
.btn-ghost:active {
  background: rgba(255,255,255,0.08);
}

/* Hero */
.hero-panel {
  position: relative;
  display: flex;
  align-items: center;
  min-height: 430px;
  padding: 58px 54px;
  margin: 0 0 24px;
  border-radius: 24px;
  overflow: hidden;
  background-size: cover;
  background-position: center center;
  border: 1px solid rgba(255,255,255,0.1);
  box-shadow: var(--shadow-soft);
  isolation: isolate;
}
.hero-panel::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(100deg, rgba(7,13,26,0.9) 20%, rgba(17,34,58,0.72) 60%, rgba(7,13,26,0.85) 100%),
    rgba(11,18,32,0.3);
}
.hero-panel::after {
  content: "";
  position: absolute;
  right: -120px;
  top: -140px;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(56,189,248,0.12), transparent 62%);
  z-index: 0;
  pointer-events: none;
}
.hero-copy {
  position: relative;
  z-index: 2;
  max-width: 820px;
}
.hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 7px 14px;
  border-radius: var(--radius-tag);
  background: rgba(56,189,248,0.1);
  border: 1px solid rgba(56,189,248,0.26);
  color: #BAE6FD;
  font-size: 13px;
  letter-spacing: 0.06em;
}
.hero-kicker i {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--success-accent);
  box-shadow: 0 0 12px rgba(45,212,191,0.85);
}
.hero-panel h1 {
  margin: 22px 0 18px;
  font-size: clamp(32px, 4vw, 48px);
  line-height: 1.22;
  font-weight: 700;
  letter-spacing: -0.01em;
}
.hero-panel h1 .brand-lead {
  color: var(--brand-accent);
}
.hero-summary {
  max-width: 720px;
  color: rgba(226,232,240,0.9);
  font-size: 17px;
  line-height: 1.8;
  margin-bottom: 24px;
}
.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 32px;
}
.text-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 13px;
  border-radius: var(--radius-tag);
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.14);
  color: var(--text-secondary);
  font-size: 13px;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

/* Section base */
.section-block {
  padding: 58px 0 42px;
}
.section-head {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 34px;
}
.section-head::before {
  content: "";
  flex: 0 0 4px;
  width: 4px;
  height: 30px;
  margin-top: 6px;
  border-radius: 4px;
  background: linear-gradient(180deg, var(--brand-accent), var(--brand-primary));
  box-shadow: 0 0 10px rgba(56,189,248,0.5);
}
.section-title {
  font-size: clamp(24px, 2.6vw, 32px);
  line-height: 1.3;
  font-weight: 700;
  letter-spacing: -0.01em;
}
.section-sub {
  margin-top: 8px;
  max-width: 760px;
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.8;
}

/* Overview */
.overview-grid {
  display: grid;
  grid-template-columns: 1.55fr 1fr;
  gap: 20px;
  align-items: stretch;
}
.glass-card {
  position: relative;
  background:
    linear-gradient(135deg, rgba(255,255,255,0.1), rgba(255,255,255,0.02)),
    rgba(17,28,46,0.4);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-glass);
  padding: 30px;
}
.overview-main .lead-line {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.85;
  margin: 14px 0 20px;
}
.overview-main .lead-line strong {
  color: var(--text-primary);
  font-weight: 600;
}
.mini-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.mini-list li {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.7;
}
.mini-list svg {
  width: 18px;
  height: 18px;
  flex: 0 0 18px;
  margin-top: 3px;
  stroke: var(--success-accent);
}
.overview-side {
  display: flex;
  flex-direction: column;
}
.side-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 18px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  padding-bottom: 12px;
}
.module-pills {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.module-pills a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 13px 14px;
  border-radius: 12px;
  border: 1px solid rgba(255,255,255,0.1);
  color: #CBD5E1;
  background: rgba(255,255,255,0.03);
  font-size: 14px;
  transition: all 0.2s ease;
}
.module-pills a:hover {
  color: #fff;
  border-color: rgba(56,189,248,0.4);
  background: rgba(37,99,235,0.14);
}
.module-pills a svg {
  width: 20px;
  height: 20px;
  stroke: currentColor;
}
.module-pills .p-deco {
  display: flex;
  align-items: center;
}
.arrow-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--link);
  font-size: 15px;
  font-weight: 500;
}
.arrow-link svg {
  width: 16px;
  height: 16px;
  stroke: currentColor;
  transition: transform 0.2s ease;
}
.arrow-link:hover svg {
  transform: translateX(4px);
}

/* Timeline */
.timeline-wrap {
  position: relative;
  border-left: 1px solid rgba(255,255,255,0.08);
  padding-left: 30px;
  margin: 12px 0 10px;
}
.timeline-wrap::before {
  content: "";
  position: absolute;
  left: -1px;
  top: 0;
  bottom: 0;
  width: 1px;
  background: linear-gradient(180deg, var(--brand-primary), rgba(56,189,248,0.4), rgba(255,255,255,0.04));
}
.tl-item {
  display: grid;
  grid-template-columns: 132px 42px minmax(0, 1fr);
  gap: 0;
  padding-bottom: 30px;
}
.tl-item:last-child {
  padding-bottom: 8px;
}
.tl-date {
  text-align: right;
  padding-top: 5px;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.02em;
  background: linear-gradient(135deg, rgba(255,255,255,0.9), rgba(186,230,253,0.75));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}
.tl-rail {
  position: relative;
}
.tl-rail::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 1px;
  transform: translateX(-50%);
  background: linear-gradient(180deg, rgba(56,189,248,0.7), rgba(255,255,255,0.05));
}
.tl-item:first-child .tl-rail::before {
  top: 8px;
}
.tl-dot {
  position: relative;
  z-index: 2;
  display: block;
  width: 14px;
  height: 14px;
  margin: 9px auto 0;
  border-radius: 50%;
  background: var(--brand-accent);
  box-shadow: 0 0 0 6px rgba(56,189,248,0.12), 0 0 18px rgba(56,189,248,0.45);
}
.tl-card {
  background: rgba(255,255,255,0.045);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-card);
  padding: 20px 22px;
  transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}
.tl-card:hover {
  transform: translateY(-2px);
  background: rgba(255,255,255,0.06);
  border-color: rgba(56,189,248,0.3);
}
.tl-card h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.4;
  margin-bottom: 8px;
}
.tl-card p {
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.75;
}
.tl-card-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-top: 14px;
}
.tag {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: var(--radius-tag);
  background: rgba(45,212,191,0.1);
  border: 1px solid rgba(45,212,191,0.22);
  color: #99F6E4;
  font-size: 12px;
  line-height: 1.6;
}
.tag-blue {
  background: rgba(37,99,235,0.12);
  border-color: rgba(56,189,248,0.22);
  color: var(--brand-accent);
}

/* Spotlight */
.spotlight-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 24px;
  align-items: center;
  background:
    linear-gradient(135deg, rgba(30,42,58,0.8), rgba(17,28,46,0.5)),
    url('/assets/images/backpic/back-3.png');
  background-size: cover;
  background-position: center;
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 20px;
  padding: 44px;
  overflow: hidden;
}
.spotlight-copy h3 {
  font-size: clamp(22px, 2.3vw, 28px);
  line-height: 1.35;
  font-weight: 700;
  margin-bottom: 14px;
}
.spotlight-copy p {
  color: #C9D5E3;
  font-size: 16px;
  line-height: 1.85;
  margin-bottom: 18px;
}
.spotlight-copy .in-tips {
  display: flex;
  flex-direction: column;
  gap: 9px;
  margin-top: 18px;
}
.spotlight-copy .in-tips span {
  display: flex;
  gap: 8px;
  color: #A9B8CC;
  font-size: 14px;
  line-height: 1.7;
}
.spotlight-copy .in-tips svg {
  width: 17px;
  height: 17px;
  flex: 0 0 17px;
  stroke: var(--success-accent);
  margin-top: 4px;
}
.spot-media {
  border-radius: 18px;
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.13);
  box-shadow: 0 14px 34px rgba(0,0,0,0.28);
}
.spot-media img {
  width: 100%;
  height: 100%;
  min-height: 280px;
  object-fit: cover;
}

/* Route guide */
.route-headnote {
  max-width: 840px;
  color: var(--text-secondary);
  line-height: 1.85;
  margin-bottom: 28px;
}
.route-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}
.route-card {
  position: relative;
  display: block;
  padding: 26px 24px;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 16px;
  color: var(--text-primary);
  transition: all 0.2s ease;
}
.route-card:hover {
  transform: translateY(-3px);
  background: rgba(37,99,235,0.12);
  border-color: rgba(56,189,248,0.34);
  color: #fff;
}
.route-card::before {
  content: "";
  position: absolute;
  left: 24px;
  right: 24px;
  top: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(56,189,248,0.45), transparent);
  opacity: 0;
  transition: opacity 0.2s ease;
}
.route-card:hover::before {
  opacity: 1;
}
.route-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  margin-bottom: 16px;
  border-radius: 10px;
  background: rgba(56,189,248,0.1);
  border: 1px solid rgba(56,189,248,0.3);
  color: var(--brand-accent);
  font-weight: 700;
  font-size: 15px;
}
.route-card h4 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 9px;
}
.route-card p {
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.75;
  margin-bottom: 12px;
}
.route-link {
  font-size: 13px;
  color: var(--link);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.route-link svg {
  width: 14px;
  height: 14px;
  stroke: currentColor;
  transition: transform 0.2s ease;
}
.route-card:hover .route-link svg {
  transform: translateX(4px);
}

/* FAQ */
.faq-wrap {
  max-width: 1040px;
}
.faq-item {
  margin-bottom: 12px;
  border-radius: var(--radius-card);
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.08);
  transition: border-color 0.25s ease, background 0.25s ease;
  overflow: hidden;
}
.faq-item[open] {
  background: rgba(37,99,235,0.08);
  border-color: rgba(37,99,235,0.36);
}
.faq-item summary {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px 20px;
  cursor: pointer;
  outline: none;
}
.faq-item summary::-webkit-details-marker {
  display: none;
}
.faq-no {
  flex: 0 0 34px;
  color: var(--brand-accent);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 0.03em;
}
.faq-question {
  flex: 1;
  color: var(--text-primary);
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
}
.faq-toggle {
  position: relative;
  flex: 0 0 30px;
  height: 30px;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,0.16);
  background: rgba(255,255,255,0.04);
}
.faq-toggle::before,
.faq-toggle::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: var(--brand-accent);
  border-radius: 3px;
  transition: all 0.25s ease;
}
.faq-toggle::before {
  width: 12px;
  height: 2px;
}
.faq-toggle::after {
  width: 2px;
  height: 12px;
}
.faq-item[open] .faq-toggle::after {
  transform: translate(-50%, -50%) scaleY(0);
}
.faq-content {
  padding: 4px 20px 20px 68px;
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.85;
}
.faq-content a {
  color: var(--link);
}

/* CTA */
.cta-section {
  margin-top: 20px;
}
.cta-band {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
  padding: 50px 54px;
  border-radius: 24px;
  overflow: hidden;
  background-image: linear-gradient(105deg, rgba(11,18,32,0.94), rgba(30,58,138,0.58), rgba(11,18,32,0.94)), url('/assets/images/backpic/back-1.webp');
  background-size: cover;
  background-position: center;
  border: 1px solid rgba(255,255,255,0.1);
}
.cta-band::before {
  content: "";
  position: absolute;
  width: 250px;
  height: 250px;
  right: -60px;
  top: -60px;
  border: 1px solid rgba(56,189,248,0.14);
  border-radius: 50%;
  background: radial-gradient(circle, rgba(56,189,248,0.11), transparent 65%);
}
.cta-copy h2 {
  font-size: clamp(24px, 2.6vw, 32px);
  font-weight: 700;
  line-height: 1.35;
  margin-bottom: 10px;
}
.cta-copy p {
  color: #C9D5E3;
  font-size: 16px;
  line-height: 1.8;
  max-width: 620px;
}
.cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  flex: 0 0 auto;
}

/* Footer */
.footer {
  margin-top: 62px;
  background: #0F172A;
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 46px 40px 22px;
}
.footer-inner {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.3fr;
  gap: 40px;
  max-width: 1280px;
  margin: 0 auto;
}
.footer-brand .brand-pin {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 11px;
  background: linear-gradient(135deg, rgba(37,99,235,0.5), rgba(30,58,138,0.7));
  border: 1px solid rgba(56,189,248,0.35);
}
.footer-brand .brand-pin i {
  display: block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--brand-accent);
  box-shadow: 0 0 12px rgba(56,189,248,0.75);
}
.footer-brand h3 {
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  margin: 16px 0 8px;
}
.footer-brand p {
  max-width: 340px;
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.8;
}
.footer-title {
  font-size: 15px;
  font-weight: 600;
  color: rgba(255,255,255,0.8);
  margin-bottom: 16px;
}
.footer-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-links a {
  color: var(--text-secondary);
  font-size: 14px;
}
.footer-links a:hover {
  color: var(--brand-accent);
}
.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 12px;
  color: var(--text-secondary);
  font-size: 14px;
}
.footer-contact-row {
  display: flex;
  gap: 8px;
  align-items: center;
}
.footer-contact-row svg {
  width: 17px;
  height: 17px;
  stroke: var(--brand-accent);
  flex: 0 0 17px;
}
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.05);
  margin-top: 40px;
  padding-top: 18px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px 26px;
  justify-content: center;
  align-items: center;
  max-width: 1280px;
  margin-left: auto;
  margin-right: auto;
  color: var(--text-muted);
  font-size: 13px;
}
.footer-domain {
  color: #64748B;
  letter-spacing: 0.02em;
}
.footer-safety {
  color: #475569;
}

/* Responsive */
@media screen and (max-width: 1120px) {
  .overview-grid {
    grid-template-columns: 1fr 0.9fr;
  }
  .route-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-inner {
    grid-template-columns: 1fr 1fr;
  }
}
@media screen and (max-width: 1023px) {
  .sidebar {
    transform: translateX(-105%);
    width: 282px;
    transition: transform 0.3s ease;
    box-shadow: 18px 0 50px rgba(0,0,0,0.3);
  }
  body.menu-open .sidebar {
    transform: translateX(0);
  }
  .sidebar-overlay {
    display: block;
    position: fixed;
    inset: 0;
    background: rgba(2,6,17,0.7);
    opacity: 0;
    pointer-events: none;
    z-index: 180;
    transition: opacity 0.3s ease;
    backdrop-filter: blur(3px);
  }
  body.menu-open .sidebar-overlay {
    opacity: 1;
    pointer-events: auto;
  }
  body.menu-open {
    overflow: hidden;
  }
  .top-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 160;
    height: 60px;
    display: flex;
    align-items: center;
    background: rgba(11,18,32,0.92);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid rgba(255,255,255,0.07);
  }
  .menu-toggle {
    flex: 0 0 46px;
    height: 46px;
    margin-left: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    background: transparent;
    color: #E2E8F0;
    cursor: pointer;
    border-radius: 10px;
  }
  .menu-toggle:hover {
    background: rgba(255,255,255,0.06);
  }
  .menu-toggle:focus-visible,
  .top-brand:focus-visible {
    outline: 2px solid var(--brand-accent);
    outline-offset: 2px;
  }
  .menu-toggle svg {
    width: 24px;
    height: 24px;
    stroke: currentColor;
  }
  .top-brand {
    flex: 1;
    color: var(--text-primary);
    font-size: 16px;
    font-weight: 700;
    padding: 0 6px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }
  .top-domain {
    color: var(--text-muted);
    font-size: 12px;
    padding-right: 18px;
    flex: 0 0 auto;
  }
  .main-wrap {
    margin-left: 0;
    padding-top: 60px;
  }
  .shell {
    padding: 18px 28px 32px;
  }
  .hero-panel {
    min-height: 400px;
    padding: 48px 40px;
  }
  .spotlight-grid {
    grid-template-columns: 1fr;
  }
  .spot-media img {
    min-height: 220px;
  }
  .cta-band {
    flex-direction: column;
    align-items: flex-start;
    padding: 42px;
  }
}
@media screen and (max-width: 767px) {
  .shell {
    padding: 14px 16px 22px;
  }
  .hero-panel {
    padding: 36px 24px;
    min-height: 0;
    border-radius: 20px;
  }
  .hero-panel h1 {
    font-size: 30px;
    line-height: 1.3;
    margin-top: 18px;
  }
  .hero-summary {
    font-size: 15px;
  }
  .hero-actions, .cta-actions {
    width: 100%;
    flex-direction: column;
  }
  .btn {
    width: 100%;
  }
  .overview-grid {
    grid-template-columns: 1fr;
  }
  .section-block {
    padding: 42px 0 26px;
  }
  .section-title {
    font-size: 24px;
  }
  .glassy-card, .glass-card {
    padding: 22px;
  }
  .tl-item {
    display: grid;
    grid-template-columns: 1fr;
    gap: 12px;
    padding-bottom: 22px;
  }
  .timeline-wrap {
    padding-left: 20px;
  }
  .tl-date {
    text-align: left;
    background: none;
    -webkit-text-fill-color: var(--brand-accent);
    color: var(--brand-accent);
    font-size: 13px;
  }
  .tl-rail {
    display: none;
  }
  .tl-card {
    padding: 16px 16px 18px;
    border-radius: 14px;
  }
  .tl-card h3 {
    font-size: 16px;
  }
  .spotlight-grid {
    padding: 26px 20px;
    gap: 22px;
    border-radius: 18px;
  }
  .spot-media img {
    min-height: 180px;
  }
  .route-grid {
    grid-template-columns: 1fr;
  }
  .route-card {
    padding: 22px 20px;
  }
  .faq-item summary {
    padding: 15px 14px;
    align-items: flex-start;
    gap: 10px;
  }
  .faq-no {
    flex-basis: 28px;
    font-size: 12px;
    padding-top: 2px;
  }
  .faq-question {
    font-size: 15px;
  }
  .faq-toggle {
    flex: 0 0 26px;
    width: 26px;
    height: 26px;
    margin-top: 2px;
  }
  .faq-content {
    padding: 2px 18px 18px 42px;
  }
  .cta-band {
    padding: 34px 20px;
    border-radius: 20px;
  }
  .crumbs {
    font-size: 13px;
    padding: 12px 2px 14px;
    overflow-x: auto;
    white-space: nowrap;
  }
  .footer {
    padding: 36px 20px 18px;
  }
  .footer-inner {
    grid-template-columns: 1fr;
    gap: 30px;
  }
  .footer-bottom {
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }
}

/* roulang page: category4 */
:root{
  --bg-base:#0B1220;
  --bg-elevated:#111C2E;
  --bg-side:#0F172A;
  --glass-bg:rgba(255,255,255,0.06);
  --glass-bg-soft:rgba(255,255,255,0.03);
  --glass-border:rgba(255,255,255,0.10);
  --glass-border-strong:rgba(255,255,255,0.18);
  --line:#1E293B;
  --text-primary:#F1F5F9;
  --text-secondary:#94A3B8;
  --text-muted:#64748B;
  --brand-primary:#2563EB;
  --brand-deep:#1D4ED8;
  --brand-accent:#38BDF8;
  --success:#2DD4BF;
  --amber:#F59E0B;
  --error:#F43F5E;
  --link:#7DD3FC;
  --radius-card:16px;
  --radius-btn:12px;
  --radius-input:14px;
  --radius-chip:999px;
  --radius-icon:8px;
  --shadow-card:0 4px 16px rgba(0,0,0,0.18);
  --shadow-hover:0 8px 24px rgba(0,0,0,0.25);
  --glow-blue:0 0 20px rgba(37,99,235,0.45);
  --container-w:1280px;
  --space-section:80px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg-base);color:var(--text-primary);font-family:"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;line-height:1.75;font-size:16px;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:var(--link);text-decoration:none}
a:hover{color:var(--brand-accent)}
button,input{font-family:inherit;font-size:inherit;color:inherit}
button{cursor:pointer;border:0;background:none}
ul,ol{padding:0;margin:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
.container{width:100%;max-width:var(--container-w);margin:0 auto;padding-left:32px;padding-right:32px}
.skip-link{position:fixed;left:-999px;top:8px;z-index:300;background:var(--brand-primary);color:#fff;padding:10px 18px;border-radius:10px}
.skip-link:focus{left:8px}
svg{flex:none}

.app-shell{display:block}
.main-wrap{margin-left:260px;min-height:100vh;display:flex;flex-direction:column}
.content{flex:1;padding-bottom:0}

.sidebar{
  position:fixed;left:0;top:0;bottom:0;width:260px;background:var(--bg-side);border-right:1px solid var(--line);
  display:flex;flex-direction:column;z-index:150;overflow-y:auto;transition:transform .28s ease;
}
.sidebar-head{padding:20px 16px 16px;border-bottom:1px solid var(--line)}
.brand-block{display:flex;align-items:center;gap:11px;color:var(--text-primary)}
.brand-block:hover{color:var(--text-primary)}
.brand-icon{
  width:40px;height:40px;border-radius:10px;flex:none;display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,#2563EB,#38BDF8);box-shadow:0 0 18px rgba(56,189,248,0.28);
}
.brand-icon i{width:11px;height:11px;border-radius:999px;background:#E0F2FE;display:block;animation:pulse 2.2s infinite ease-in-out}
@keyframes pulse{
  0%,100%{box-shadow:0 0 0 0 rgba(224,242,254,.6);opacity:1}
  50%{box-shadow:0 0 0 7px rgba(224,242,254,0);opacity:.75}
}
.brand-copy{display:flex;flex-direction:column;min-width:0}
.brand-copy strong{font-size:16px;font-weight:700;line-height:1.35;white-space:nowrap;color:#fff}
.brand-copy small{font-size:11px;color:var(--text-muted);line-height:1.4;margin-top:2px}
.sidebar-close{display:none}

.nav-caption{padding:22px 24px 8px;font-size:12px;letter-spacing:2px;color:var(--text-muted)}
.nav-list{display:flex;flex-direction:column;gap:4px;padding:0 12px 14px}
.nav-item .nav-link{
  display:flex;align-items:center;gap:12px;padding:11px 14px;border-radius:12px;color:var(--text-secondary);
  font-weight:500;font-size:15px;position:relative;border-left:3px solid transparent;transition:background .2s ease,color .2s ease;
}
.nav-item .nav-link svg{width:20px;height:20px;stroke:currentColor}
.nav-item .nav-link:hover{background:rgba(255,255,255,0.05);color:#fff}
.nav-item .nav-link.active{background:linear-gradient(90deg,rgba(37,99,235,0.16),rgba(37,99,235,0.04));color:#fff;border-left-color:var(--brand-accent);box-shadow:0 0 16px rgba(37,99,235,0.14)}
.nav-item .nav-link:focus-visible{outline:2px solid var(--brand-accent);outline-offset:2px}
.sidebar-foot{padding:18px 20px 20px;margin-top:auto;font-size:12px;color:var(--text-muted);border-top:1px solid var(--line)}
.sidebar-foot p{display:flex;align-items:center;gap:8px;margin-top:6px;line-height:1.6}
.sidebar-foot p:first-child{margin-top:0}
.sidebar-foot svg{width:15px;height:15px;stroke:var(--success)}

.mobile-header{display:none;position:sticky;top:0;z-index:120;height:62px;align-items:center;justify-content:space-between;padding:0 20px;background:rgba(15,23,42,.88);backdrop-filter:blur(16px);border-bottom:1px solid var(--line)}
.mobile-brand{font-size:16px;font-weight:700;color:#fff;display:flex;align-items:center;gap:9px;line-height:1.2}
.mobile-brand::before{content:"";width:9px;height:9px;border-radius:50%;background:var(--brand-accent);box-shadow:0 0 12px rgba(56,189,248,.7)}
.mobile-menu-btn{
  width:44px;height:44px;display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--glass-border);border-radius:12px;
  background:rgba(255,255,255,.05);color:var(--text-primary);
}
.mobile-menu-btn:hover{border-color:var(--brand-accent)}
.mobile-menu-btn svg{width:22px;height:22px}
.backdrop-menu{display:none;position:fixed;inset:0;background:rgba(0,0,0,.55);backdrop-filter:blur(2px);z-index:140}
.backdrop-menu.show{display:block}

.content-section{padding:var(--space-section) 0}

.page-hero{position:relative;padding:76px 0 96px;background-size:cover;background-position:center;border-bottom:1px solid rgba(255,255,255,0.06);overflow:hidden}
.page-hero::before{content:"";position:absolute;inset:0;background:linear-gradient(105deg,#0B1220 18%,rgba(37,99,235,.26) 58%,#0B1220 84%);pointer-events:none}
.page-hero-inner{position:relative;z-index:1}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:9px;color:var(--text-muted);font-size:14px;margin-bottom:26px}
.breadcrumb a{color:var(--text-secondary)}
.breadcrumb a:hover{color:var(--brand-accent)}
.breadcrumb .slash{opacity:.5}
.page-hero h1{font-size:46px;line-height:1.18;font-weight:700;letter-spacing:.5px;margin-bottom:16px}
.hero-sub{max-width:760px;font-size:17px;color:var(--text-secondary);line-height:1.9;margin-bottom:32px}

.help-search{
  display:flex;align-items:center;gap:10px;max-width:720px;background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.14);
  border-radius:var(--radius-input);padding:8px 8px 8px 18px;backdrop-filter:blur(14px);box-shadow:var(--shadow-card);
}
.help-search:focus-within{border-color:var(--brand-accent);box-shadow:0 0 0 3px rgba(56,189,248,.16),var(--shadow-card)}
.help-search svg{width:21px;height:21px;stroke:var(--text-muted)}
.help-search input{flex:1;min-width:0;background:transparent;border:0;outline:0;padding:10px 4px;color:var(--text-primary);font-size:15px}
.help-search input::placeholder{color:var(--text-muted)}
.help-search .search-btn{background:linear-gradient(135deg,#2563EB,#1D4ED8);color:#fff;font-size:15px;font-weight:600;padding:11px 22px;border-radius:10px;box-shadow:0 0 16px rgba(37,99,235,.25);transition:all .2s ease;opacity:.92;cursor:pointer}
.help-search .search-btn:hover{box-shadow:var(--glow-blue);opacity:1;transform:translateY(-1px)}
.help-search .search-btn:active{transform:translateY(1px)}
.search-empty{margin-top:18px;color:var(--amber);font-size:14px;background:rgba(245,158,11,.08);border:1px solid rgba(245,158,11,.2);padding:12px 16px;border-radius:12px;max-width:720px}

.section-title{display:flex;align-items:center;gap:12px;font-size:30px;line-height:1.3;font-weight:700;margin-bottom:14px}
.section-title .deco{width:4px;height:26px;flex:none;border-radius:3px;background:var(--brand-accent);box-shadow:0 0 12px rgba(56,189,248,.55)}
.section-desc{color:var(--text-secondary);font-size:16px;line-height:1.85;max-width:920px;margin:0 0 26px}

.toc-section .intro-panel{
  display:grid;grid-template-columns:1.05fr .95fr;background:linear-gradient(120deg,rgba(255,255,255,.07),rgba(255,255,255,.025));
  border:1px solid var(--glass-border);border-radius:20px;overflow:hidden;box-shadow:var(--shadow-card);
}
.intro-copy{padding:40px 44px}
.intro-copy p{color:var(--text-secondary);margin:8px 0 28px}
.topic-list{display:flex;flex-direction:column;gap:4px}
.topic-list a{
  display:grid;grid-template-columns:42px 1fr;align-items:center;gap:12px;padding:14px 16px;border-radius:14px;color:var(--text-primary);
  background:rgba(255,255,255,.035);border:1px solid rgba(255,255,255,.06);transition:border-color .2s ease,background .2s ease,transform .2s ease;
}
.topic-list a:hover{background:rgba(37,99,235,.1);border-color:rgba(56,189,248,.45);transform:translateY(-2px);color:#fff}
.topic-list .topic-num{font-size:14px;font-weight:700;color:var(--brand-accent);display:flex;align-items:center;justify-content:center;width:34px;height:34px;border-radius:10px;background:rgba(56,189,248,.1)}
.topic-list strong{display:block;font-size:17px;font-weight:600}
.topic-list small{font-size:13px;color:var(--text-secondary);line-height:1.6;display:block}
.intro-visual{position:relative;min-height:280px}
.intro-visual img{width:100%;height:100%;object-fit:cover;position:absolute;inset:0}
.intro-visual::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(11,18,32,.38),transparent 36%)}

.faq-wrap{display:flex;flex-direction:column;gap:52px}
.faq-group{background:rgba(255,255,255,.025);border:1px solid rgba(255,255,255,.08);border-radius:20px;padding:38px 42px;scroll-margin-top:90px}
.faq-group .section-title{font-size:26px}
.faq-group:nth-child(even){background:linear-gradient(135deg,rgba(37,99,235,.07),rgba(17,28,46,.4))}
.qa-list{display:flex;flex-direction:column;gap:12px}
.qa-item{background:var(--glass-bg-soft);border:1px solid rgba(255,255,255,.09);border-radius:16px;overflow:hidden;transition:border-color .25s ease,background .25s ease,box-shadow .25s ease}
.qa-item.active{background:rgba(37,99,235,.09);border-color:rgba(56,189,248,.28);box-shadow:0 0 20px rgba(37,99,235,.08)}
.qa-btn{
  width:100%;display:flex;align-items:flex-start;gap:16px;padding:19px 22px;color:var(--text-primary);text-align:left;
  font-size:17px;font-weight:600;line-height:1.55;transition:color .2s ease;
}
.qa-btn:focus-visible{outline:2px solid var(--brand-accent);outline-offset:-2px;border-radius:16px}
.qa-num{font-size:13px;font-weight:700;color:var(--brand-accent);background:rgba(56,189,248,.1);border-radius:8px;width:32px;height:32px;flex:none;display:flex;align-items:center;justify-content:center;margin-top:2px}
.qa-text{flex:1;min-width:0}
.qa-chevron{position:relative;width:20px;height:20px;flex:none;margin-top:6px}
.qa-chevron::before,.qa-chevron::after{content:"";position:absolute;inset:6px 1px 7px 10px;background:var(--text-secondary);border-radius:2px;transition:background .2s,transform .2s}
.qa-chevron::before{transform:rotate(90deg)}
.qa-item.active .qa-chevron::before,.qa-item.active .qa-chevron::after{background:var(--brand-accent)}
.qa-item.active .qa-chevron::before{transform:rotate(180deg)}
.qa-item.active .qa-chevron::after{transform:rotate(0)}
.qa-panel{max-height:0;overflow:hidden;transition:max-height .3s ease}
.qa-item.active .qa-panel{max-height:460px}
.qa-answer{padding:2px 24px 24px 70px;color:var(--text-secondary);font-size:15px;line-height:1.9;border-top:1px dashed rgba(255,255,255,.07);margin:0 22px 0;box-sizing:content-box}

.support-note{
  display:grid;grid-template-columns:repeat(4,1fr);border:1px solid var(--glass-border);background:var(--bg-elevated);
  border-radius:18px;padding:30px 6px;margin-top:44px;
}
.support-note .note-item{text-align:center;padding:8px 18px}
.support-note .note-item + .note-item{border-left:1px solid rgba(255,255,255,.06)}
.support-note .note-icon{width:42px;height:42px;border-radius:12px;background:rgba(37,99,235,.15);display:flex;align-items:center;justify-content:center;margin:0 auto 12px;color:var(--brand-accent)}
.support-note .note-icon svg{width:21px;height:21px;stroke:currentColor}
.support-note strong{display:block;font-size:16px;font-weight:600;color:#fff}
.support-note span{font-size:13px;color:var(--text-muted)}

.cta-section{padding:26px 0 80px}
.cta-band{
  position:relative;display:flex;align-items:center;justify-content:space-between;gap:30px;border-radius:22px;overflow:hidden;
  background:linear-gradient(105deg,rgba(11,18,32,.96),rgba(30,42,58,.68)),url('/assets/images/backpic/back-3.png'),#0F172A;
  background-size:cover;background-position:center;padding:62px 64px;border:1px solid rgba(255,255,255,.09);
}
.cta-band::after{content:"";position:absolute;right:0;top:0;bottom:0;width:32%;background:radial-gradient(circle at center,rgba(56,189,248,.22),transparent 68%);pointer-events:none}
.cta-content{max-width:600px;position:relative;z-index:1}
.cta-content h2{font-size:32px;font-weight:700;line-height:1.35;margin-bottom:10px}
.cta-content p{color:var(--text-secondary);font-size:16px}
.cta-actions{position:relative;z-index:1;display:flex;flex-wrap:wrap;gap:14px}
.btn{display:inline-flex;align-items:center;gap:10px;padding:14px 30px;border-radius:12px;font-weight:600;font-size:16px;line-height:1;transition:all .2s ease;justify-content:center;min-height:48px}
.btn svg{width:19px;height:19px}
.btn:focus-visible{outline:2px solid var(--brand-accent);outline-offset:3px}
.btn-primary{background:linear-gradient(135deg,#2563EB,#1D4ED8);color:#fff;box-shadow:0 4px 14px rgba(37,99,235,.3)}
.btn-primary:hover{color:#fff;box-shadow:var(--glow-blue);transform:translateY(-2px)}
.btn-primary:active{transform:translateY(0);box-shadow:0 0 9px rgba(37,99,235,.4)}
.btn-ghost{background:rgba(255,255,255,.06);border:1px solid var(--glass-border-strong);color:#E2E8F0;backdrop-filter:blur(8px)}
.btn-ghost:hover{border-color:rgba(255,255,255,.3);color:#fff;background:rgba(255,255,255,.12)}
.btn-ghost:active{transform:translateY(1px)}

.footer{background:#0B1220;border-top:1px solid rgba(255,255,255,.07);margin-top:20px;padding:48px 0 18px}
.footer::before{content:"";display:block;height:1px;max-width:1280px;margin:-48px auto 44px;background:linear-gradient(90deg,transparent,#1E293B,transparent)}
.footer-inner{display:grid;grid-template-columns:1.4fr .8fr .8fr 1fr;gap:34px;max-width:1200px;margin:0 auto;padding:0 32px}
.footer-brand .brand-pin{width:40px;height:40px;border-radius:10px;background:rgba(37,99,235,.18);display:flex;align-items:center;justify-content:center;margin-bottom:14px}
.footer-brand .brand-pin i{width:11px;height:11px;background:var(--brand-accent);border-radius:99px;box-shadow:0 0 12px rgba(56,189,248,.75)}
.footer-brand h3{font-size:17px;margin:0 0 8px;color:#fff;font-weight:700}
.footer-brand p{font-size:13px;color:var(--text-muted);line-height:1.8;margin-bottom:6px}
.footer-title{font-size:16px;color:rgba(255,255,255,.72);font-weight:600;margin-bottom:14px}
.footer-links{display:flex;flex-direction:column;gap:9px}
.footer-links a{font-size:14px;color:var(--text-muted)}
.footer-links a:hover{color:var(--brand-accent)}
.footer-contact{display:flex;flex-direction:column;gap:12px}
.footer-contact-row{display:flex;align-items:center;gap:9px;font-size:13px;color:var(--text-muted);line-height:1.6}
.footer-contact-row svg{width:16px;height:16px;stroke:var(--text-muted);flex:none}
.footer-bottom{margin-top:34px;padding:18px 32px 0;border-top:1px solid rgba(255,255,255,.06);display:flex;flex-wrap:wrap;justify-content:space-between;gap:8px;color:var(--text-muted);font-size:13px;max-width:1200px;margin-left:auto;margin-right:auto}
.footer-domain{color:var(--text-secondary)}
.footer-safety{width:100%;font-size:12px;color:rgba(100,116,139,.7)}

html{scroll-padding-top:80px}
@media (max-width:1023px){
  .main-wrap{margin-left:0}
  .sidebar{transform:translateX(-100%)}
  .sidebar.open{transform:translateX(0);box-shadow:24px 0 60px rgba(0,0,0,.36)}
  .sidebar.open .sidebar-close{display:inline-flex;margin-left:auto}
  .sidebar.open .sidebar-head{display:flex;align-items:center}
  .mobile-header{display:flex}
  .mobile-header .mobile-logo-min{display:none}
  .container{padding-left:24px;padding-right:24px}
  .page-hero{padding:64px 0 76px}
  .page-hero h1{font-size:36px}
  .section-title{font-size:26px}
  .page-hero,.content-section{background-attachment:scroll}
  .footer-inner{grid-template-columns:1fr 1fr 1fr;gap:32px 24px}
  .footer-inner .footer-brand{grid-column:1 / -1}
  .footer-inner>div:last-child{grid-column:1 / -1}
  .support-note{grid-template-columns:repeat(2,1fr);gap:22px 0}
  .support-note .note-item:nth-child(3){border-left:0}
}
@media (max-width:767px){
  :root{--space-section:58px}
  .content-section .container,.faq-wrap .container{padding-left:15px;padding-right:15px}
  .sidebar{width:280px}
  .sidebar-head{display:flex;align-items:center;gap:10px}
  .sidebar-head .brand-copy strong{font-size:15px;white-space:normal}
  .sidebar-close{display:inline-flex;width:36px;height:36px;align-items:center;justify-content:center;border-radius:10px;border:1px solid var(--glass-border);color:var(--text-secondary);margin-left:14px}
  .mobile-header{padding:0 14px;height:60px}
  .page-hero h1{font-size:31px;line-height:1.3}
  .hero-sub{font-size:15px;line-height:1.85}
  .help-search{padding:6px;flex-wrap:wrap;border-radius:14px}
  .help-search input{padding:10px 10px;width:calc(100% - 80px)}
  .help-search .search-btn{width:100%;justify-content:center;display:flex}
  .search-empty{margin:14px 0}
  .toc-section .intro-panel{grid-template-columns:1fr}
  .intro-copy{padding:28px 22px}
  .intro-visual{min-height:220px;order:-1}
  .intro-visual img{position:relative;height:230px;object-fit:cover}
  .intro-visual::after{background:linear-gradient(0deg,rgba(11,18,32,.35),transparent)}
  .topic-list a{padding:12px 10px}
  .faq-group{padding:26px 16px;border-radius:18px}
  .qa-btn{padding:16px 12px;gap:11px}
  .qa-answer{padding:2px 16px 22px 18px;margin:0 10px}
  .qa-chevron{width:15px;height:15px}
  .section-title{font-size:23px}
  .faq-group .section-title{font-size:22px}
  .cta-band{flex-direction:column;padding:36px 22px;align-items:flex-start}
  .cta-content h2{font-size:25px}
  .btn{width:100%}
  .footer-inner{grid-template-columns:1fr;padding:0 20px}
  .footer-inner>div{grid-column:auto}
  .footer-brand,.footer-inner>div:last-child{grid-column:auto}
  .footer-bottom{flex-direction:column;align-items:flex-start;padding:16px 16px 0}
  .cta-section{padding-bottom:44px}
}
@media (max-width:380px){
  .footer-inner{grid-template-columns:1fr}
}