/* roulang page: index */
:root{
      --ink:#17212b;
      --muted:#687580;
      --paper:#f5f7f8;
      --white:#fff;
      --line:#e3e9ec;
      --teal:#0c7774;
      --teal-dark:#075451;
      --coral:#ef765f;
      --gold:#d59d3d;
      --shadow:0 18px 45px rgba(23,33,43,.09);
      --radius:22px;
      --small-radius:12px;
      --max:1180px;
    }
    *{box-sizing:border-box;margin:0;padding:0}
    html{scroll-behavior:smooth}
    body{font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",Arial,sans-serif;color:var(--ink);background:var(--paper);line-height:1.7}
    a{color:inherit;text-decoration:none}
    img{display:block;width:100%;object-fit:cover}
    button,input{font:inherit}
    button{cursor:pointer}
    .container{width:min(var(--max),calc(100% - 40px));margin:0 auto}
    .site-header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.92);backdrop-filter:blur(16px);border-bottom:1px solid rgba(227,233,236,.85)}
    .nav-wrap{height:76px;display:flex;align-items:center;justify-content:space-between;gap:28px}
    .brand{display:flex;align-items:center;gap:12px;font-weight:800;white-space:nowrap}
    .brand-mark{display:grid;place-items:center;width:38px;height:38px;border-radius:12px;background:var(--teal);color:#fff;font-size:18px;box-shadow:0 8px 18px rgba(12,119,116,.2)}
    .brand-name{font-size:17px;letter-spacing:.01em}
    .main-nav{display:flex;align-items:center;gap:8px}
    .main-nav a{padding:9px 13px;border-radius:10px;color:var(--muted);font-size:14px;transition:.2s}
    .main-nav a:hover,.main-nav a.active{color:var(--teal);background:#eaf5f4}
    .nav-action{display:flex;align-items:center;gap:10px}
    .nav-search{display:flex;align-items:center;gap:7px;border:1px solid var(--line);background:#fff;padding:8px 12px;border-radius:11px;color:var(--muted);font-size:13px}
    .nav-search input{border:0;outline:0;width:94px;color:var(--ink);background:transparent}
    .menu-toggle{display:none;border:0;background:transparent;font-size:24px;color:var(--ink)}
    .hero{position:relative;min-height:600px;display:flex;align-items:center;overflow:hidden;color:#fff;background:#173f42}
    .hero-bg{position:absolute;inset:0;background:linear-gradient(90deg,rgba(10,42,43,.95) 0%,rgba(10,42,43,.72) 48%,rgba(10,42,43,.2) 100%),url("https://images.unsplash.com/photo-1528360983277-13d401cdc186?auto=format&fit=crop&w=1900&q=88") center/cover}
    .hero-inner{position:relative;z-index:1;padding:84px 0 92px}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;color:#bde7df;font-size:13px;font-weight:700;letter-spacing:.12em;margin-bottom:18px}
    .eyebrow:before{content:"";width:28px;height:2px;background:var(--coral)}
    h1{max-width:700px;font-size:clamp(38px,5.2vw,70px);line-height:1.18;letter-spacing:0;font-weight:850}
    h1 em{font-style:normal;color:#ffb49f}
    .hero-copy{max-width:650px;margin-top:22px;color:#d7e7e5;font-size:16px;line-height:1.95}
    .hero-actions{display:flex;gap:12px;margin-top:30px;flex-wrap:wrap}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid transparent;border-radius:11px;padding:12px 20px;font-weight:750;font-size:14px;transition:.2s}
    .btn-primary{background:var(--coral);color:#fff;box-shadow:0 9px 20px rgba(239,118,95,.25)}
    .btn-primary:hover{background:#dc624d;transform:translateY(-2px)}
    .btn-light{background:rgba(255,255,255,.1);border-color:rgba(255,255,255,.3);color:#fff}
    .btn-light:hover{background:#fff;color:var(--teal)}
    .hero-stats{display:flex;gap:34px;margin-top:46px;padding-top:23px;border-top:1px solid rgba(255,255,255,.2)}
    .hero-stats strong{display:block;font-size:25px;line-height:1.2}
    .hero-stats span{display:block;color:#b9d0ce;font-size:12px;margin-top:5px}
    section{padding:82px 0}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:25px;margin-bottom:30px}
    .section-kicker{color:var(--teal);font-size:12px;font-weight:800;letter-spacing:.14em;text-transform:uppercase;margin-bottom:8px}
    h2{font-size:30px;line-height:1.3;letter-spacing:0}
    .section-intro{max-width:620px;color:var(--muted);font-size:14px;line-height:1.85;margin-top:10px}
    .text-link{color:var(--teal);font-size:14px;font-weight:750;white-space:nowrap}
    .text-link:hover{text-decoration:underline}
    .search-section{background:#fff;padding:24px 0;border-bottom:1px solid var(--line)}
    .search-box{display:flex;align-items:center;gap:14px;border:1px solid var(--line);padding:10px 12px 10px 18px;border-radius:15px;background:var(--paper);box-shadow:0 6px 18px rgba(23,33,43,.04)}
    .search-box span{font-size:20px;color:var(--teal)}
    .search-box input{flex:1;min-width:0;border:0;background:transparent;outline:0;font-size:14px;color:var(--ink)}
    .search-box input::placeholder{color:#9aa6ac}
    .metric-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .metric{padding:22px;background:#fff;border:1px solid var(--line);border-radius:var(--small-radius)}
    .metric strong{display:block;color:var(--teal);font-size:28px;line-height:1.2}
    .metric span{display:block;margin-top:5px;color:var(--muted);font-size:13px}
    .category-section{background:#edf5f4}
    .category-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .category{min-height:190px;padding:25px;background:#fff;border-radius:var(--radius);border:1px solid rgba(12,119,116,.1);transition:.25s}
    .category:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
    .category-icon{width:44px;height:44px;display:grid;place-items:center;border-radius:13px;background:#dff1ef;color:var(--teal);font-size:21px;margin-bottom:24px}
    .category h3{font-size:18px;margin-bottom:8px}
    .category p{font-size:13px;color:var(--muted);line-height:1.75}
    .content-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
    .content-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:.25s}
    .content-card:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
    .card-image{height:205px;position:relative;overflow:hidden}
    .card-image img{height:100%;transition:.35s}
    .content-card:hover .card-image img{transform:scale(1.05)}
    .badge{position:absolute;top:13px;left:13px;background:rgba(255,255,255,.92);color:var(--teal);border-radius:8px;padding:3px 8px;font-size:11px;font-weight:800}
    .rating{position:absolute;right:13px;top:13px;background:rgba(23,33,43,.78);color:#fff;border-radius:8px;padding:3px 8px;font-size:11px}
    .card-body{padding:18px}
    .card-body h3{font-size:17px;line-height:1.45;margin-bottom:7px}
    .card-body p{font-size:13px;color:var(--muted);line-height:1.75}
    .card-meta{display:flex;justify-content:space-between;gap:8px;margin-top:15px;color:#8a979d;font-size:12px}
    .featured-section{background:#fff}
    .featured-grid{display:grid;grid-template-columns:1.35fr .8fr .8fr;gap:18px}
    .feature-large{grid-row:span 2;position:relative;min-height:460px;border-radius:var(--radius);overflow:hidden;color:#fff}
    .feature-large img{height:100%}
    .feature-large:after{content:"";position:absolute;inset:35% 0 0;background:linear-gradient(transparent,rgba(7,30,31,.9))}
    .feature-content{position:absolute;z-index:1;left:25px;right:25px;bottom:25px}
    .feature-content h3{font-size:25px;line-height:1.35;margin:10px 0}
    .feature-content p{font-size:13px;color:#dcebea}
    .feature-small{position:relative;min-height:220px;border-radius:var(--radius);overflow:hidden;color:#fff}
    .feature-small img{height:100%}
    .feature-small:after{content:"";position:absolute;inset:35% 0 0;background:linear-gradient(transparent,rgba(7,30,31,.86))}
    .feature-small div{position:absolute;z-index:1;left:18px;right:18px;bottom:17px}
    .feature-small h3{font-size:17px;line-height:1.4}
    .updates{background:#f8faf9}
    .update-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .update .card-image{height:170px}
    .rank-layout{display:grid;grid-template-columns:1fr .75fr;gap:55px;align-items:start}
    .rank-list{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
    .rank-item{display:grid;grid-template-columns:42px 1fr auto auto;align-items:center;gap:15px;padding:16px 20px;border-bottom:1px solid var(--line);transition:.2s}
    .rank-item:last-child{border-bottom:0}
    .rank-item:hover{background:#f3f9f8}
    .rank-no{font-size:18px;color:#96a4aa;font-weight:800}
    .rank-no:first-letter{color:var(--coral)}
    .rank-name{font-size:14px;font-weight:750}
    .rank-type{font-size:11px;color:var(--teal);background:#e6f3f1;padding:3px 7px;border-radius:6px}
    .rank-hot{font-size:12px;color:var(--muted)}
    .rank-side{padding:30px;background:var(--teal);color:#fff;border-radius:var(--radius);min-height:270px}
    .rank-side h3{font-size:24px;margin-bottom:12px}
    .rank-side p{color:#cce3e0;font-size:14px;line-height:1.9}
    .rank-side .side-number{margin-top:34px;font-size:42px;font-weight:850;line-height:1;color:#ffb49f}
    .rank-side small{color:#cce3e0}
    .resources{background:#172f32;color:#fff}
    .resources .section-kicker{color:#ffb49f}
    .resources .section-intro{color:#bcd0ce}
    .resource-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .resource{padding:23px;border:1px solid rgba(255,255,255,.14);background:rgba(255,255,255,.06);border-radius:var(--radius)}
    .resource strong{display:flex;justify-content:space-between;font-size:17px}
    .resource strong span{color:#ffb49f}
    .resource p{margin-top:12px;color:#bcd0ce;font-size:13px;line-height:1.8}
    .timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border-top:2px solid #cce5e2}
    .time-item{position:relative;padding:25px 20px 0 0}
    .time-item:before{content:"";position:absolute;top:-8px;left:0;width:14px;height:14px;border-radius:50%;background:var(--coral);border:3px solid var(--paper)}
    .time-item strong{display:block;color:var(--teal);font-size:13px;margin-bottom:9px}
    .time-item h3{font-size:16px;margin-bottom:7px}
    .time-item p{font-size:13px;color:var(--muted);line-height:1.7}
    .news-section{background:#fff}
    .news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .news-item{display:grid;grid-template-columns:105px 1fr;gap:15px;padding:13px;border:1px solid var(--line);border-radius:14px;transition:.2s}
    .news-item:hover{border-color:#a9d7d2;box-shadow:0 8px 20px rgba(23,33,43,.06)}
    .news-item img{height:84px;border-radius:10px}
    .news-item h3{font-size:14px;line-height:1.5}
    .news-item time{display:block;color:#9aa5aa;font-size:11px;margin-top:8px}
    .trust{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .trust-item{padding:25px;background:#fff;border-left:4px solid var(--teal);border-radius:12px;box-shadow:0 5px 18px rgba(23,33,43,.04)}
    .trust-item h3{font-size:16px;margin-bottom:7px}
    .trust-item p{font-size:13px;color:var(--muted);line-height:1.75}
    .faq-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
    .faq{padding:20px 22px;background:#fff;border:1px solid var(--line);border-radius:14px}
    .faq h3{font-size:15px;margin-bottom:8px}
    .faq p{font-size:13px;color:var(--muted);line-height:1.8}
    .closing{padding:70px 0;background:#e6f3f1}
    .closing-inner{display:flex;align-items:center;justify-content:space-between;gap:30px}
    .closing h2{max-width:600px}
    .closing p{color:var(--muted);font-size:14px;margin-top:9px}
    footer{background:#12272a;color:#dcebea;padding:55px 0 22px}
    .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:35px;padding-bottom:40px}
    .footer-brand p{color:#9eb8b6;font-size:13px;line-height:1.8;max-width:285px;margin-top:15px}
    footer h3{font-size:14px;margin-bottom:14px;color:#fff}
    footer ul{list-style:none}
    footer li{margin:8px 0;color:#9eb8b6;font-size:13px}
    footer a:hover{color:#ffb49f}
    .copyright{padding-top:20px;border-top:1px solid rgba(255,255,255,.13);color:#83a09e;font-size:12px;display:flex;justify-content:space-between;gap:15px}
    :focus-visible{outline:3px solid rgba(239,118,95,.45);outline-offset:3px}
    @media(max-width:1024px){
      .main-nav{gap:2px}.main-nav a{padding:8px 8px}
      .category-grid,.update-grid{grid-template-columns:repeat(2,1fr)}
      .featured-grid{grid-template-columns:1fr 1fr}.feature-large{grid-row:span 2}
      .rank-layout{gap:25px}
    }
    @media(max-width:768px){
      .container{width:min(var(--max),calc(100% - 30px))}
      .nav-wrap{height:68px}.nav-action{display:none}.menu-toggle{display:block}
      .main-nav{display:none;position:absolute;left:15px;right:15px;top:68px;padding:10px;background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow);flex-direction:column;align-items:stretch}
      .main-nav.open{display:flex}.main-nav a{padding:11px 14px}
      .hero{min-height:620px}.hero-inner{padding:70px 0}
      section{padding:62px 0}.metric-grid{grid-template-columns:repeat(2,1fr)}
      .content-grid,.news-grid{grid-template-columns:1fr 1fr}
      .rank-layout{grid-template-columns:1fr}.rank-side{display:none}
      .resource-grid,.trust{grid-template-columns:1fr 1fr}
      .footer-grid{grid-template-columns:1.5fr 1fr 1fr}
    }
    @media(max-width:520px){
      h1{font-size:39px}.hero-copy{font-size:14px}.hero-stats{gap:20px}
      .section-head{display:block}.section-head .text-link{display:inline-block;margin-top:14px}
      .category-grid,.content-grid,.update-grid,.news-grid,.resource-grid,.trust,.faq-grid{grid-template-columns:1fr}
      .featured-grid{grid-template-columns:1fr}.feature-large{min-height:390px;grid-row:auto}.feature-small{min-height:190px}
      .timeline{display:block;border-top:0;border-left:2px solid #cce5e2;margin-left:8px}
      .time-item{padding:0 0 25px 22px}.time-item:before{top:2px;left:-8px}
      .closing-inner{display:block}.closing .btn{margin-top:20px}
      .footer-grid{grid-template-columns:1fr 1fr;gap:28px}.footer-brand{grid-column:1/-1}
      .copyright{display:block}.copyright span{display:block;margin-top:7px}
      .search-box .btn{padding:10px 12px;font-size:12px}
    }