/* roulang page: index */
:root{
      --ink:#17191d;
      --muted:#737983;
      --soft:#a7adb6;
      --paper:#f6f7f9;
      --white:#ffffff;
      --line:#e7e9ed;
      --accent:#e64235;
      --accent-dark:#b92d25;
      --gold:#e6a82d;
      --mint:#2d9f87;
      --night:#191d27;
      --radius:16px;
      --shadow:0 12px 35px rgba(25,29,39,.08);
      --shadow-hover:0 18px 42px rgba(25,29,39,.15);
      --max:1180px;
    }
    *{box-sizing:border-box;margin:0;padding:0}
    html{scroll-behavior:smooth}
    body{font-family:"PingFang SC","Microsoft YaHei",Arial,sans-serif;color:var(--ink);background:var(--paper);line-height:1.7;font-size:15px}
    a{color:inherit;text-decoration:none}
    img{display:block;width:100%;object-fit:cover}
    button,input{font:inherit}
    button{border:0;cursor:pointer}
    :focus-visible{outline:3px solid rgba(230,66,53,.35);outline-offset:3px}
    .container{width:min(var(--max),calc(100% - 40px));margin:auto}
    .topline{height:4px;background:var(--accent)}
    header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.94);backdrop-filter:blur(15px);border-bottom:1px solid rgba(231,233,237,.9)}
    .nav-wrap{height:76px;display:flex;align-items:center;justify-content:space-between;gap:24px}
    .brand{display:flex;align-items:center;gap:11px;white-space:nowrap}
    .brand-mark{width:38px;height:38px;border-radius:10px;background:var(--accent);color:#fff;display:grid;place-items:center;font-size:19px;font-weight:800;box-shadow:0 7px 16px rgba(230,66,53,.25)}
    .brand-name{font-size:18px;font-weight:800;letter-spacing:0}
    nav{display:flex;align-items:center;gap:5px}
    nav a{padding:9px 13px;border-radius:9px;color:#626872;font-weight:600;transition:.2s}
    nav a:hover,nav a.active{color:var(--accent);background:#fff0ee}
    .nav-tools{display:flex;align-items:center;gap:9px}
    .search{width:172px;height:39px;border:1px solid var(--line);border-radius:9px;background:#fafbfc;padding:0 12px;color:var(--ink)}
    .search::placeholder{color:#a8adb5}
    .nav-button{background:var(--ink);color:#fff;border-radius:9px;padding:9px 15px;font-weight:700;transition:.2s}
    .nav-button:hover{background:var(--accent);transform:translateY(-1px)}
    .menu-toggle{display:none;background:#f0f1f4;border-radius:9px;width:40px;height:40px;font-size:20px}
    .hero{min-height:600px;background:var(--night);color:#fff;position:relative;overflow:hidden;display:flex;align-items:center}
    .hero:before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(18,21,28,.95) 0%,rgba(18,21,28,.74) 44%,rgba(18,21,28,.18) 100%),url("https://images.unsplash.com/photo-1485846234645-a62644f84728?auto=format&fit=crop&w=1800&q=85") center/cover}
    .hero-inner{position:relative;z-index:1;width:min(var(--max),calc(100% - 40px));margin:auto;padding:82px 0 74px}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;color:#ffb1a8;font-size:13px;font-weight:800;letter-spacing:1.5px;margin-bottom:18px}
    .eyebrow:before{content:"";width:24px;height:2px;background:var(--accent)}
    h1{font-size:clamp(38px,5vw,68px);line-height:1.16;letter-spacing:0;font-weight:900;max-width:690px}
    h1 em{font-style:normal;color:#ff8176}
    .hero-lead{max-width:680px;margin:24px 0 28px;color:#d5d8de;font-size:17px;line-height:1.9}
    .hero-actions{display:flex;gap:12px;flex-wrap:wrap}
    .btn{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:0 21px;border-radius:10px;font-weight:800;transition:.2s;border:1px solid transparent}
    .btn-primary{background:var(--accent);color:#fff;box-shadow:0 9px 20px rgba(230,66,53,.25)}
    .btn-primary:hover{background:#f05244;transform:translateY(-2px)}
    .btn-outline{border-color:rgba(255,255,255,.33);color:#fff;background:rgba(255,255,255,.08)}
    .btn-outline:hover{background:#fff;color:var(--ink)}
    .trust-line{display:flex;flex-wrap:wrap;gap:22px;margin-top:38px;color:#b8bdc7;font-size:13px}
    .trust-line span:before{content:"✓";color:#77d2ba;font-weight:900;margin-right:7px}
    section{padding:88px 0}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:20px;margin-bottom:30px}
    .section-kicker{color:var(--accent);font-weight:800;font-size:13px;letter-spacing:1px;margin-bottom:7px}
    h2{font-size:31px;line-height:1.25;letter-spacing:0}
    .section-intro{max-width:670px;color:var(--muted);margin-top:10px}
    .text-link{color:var(--accent);font-weight:800;white-space:nowrap}
    .text-link:hover{text-decoration:underline}
    .metrics{background:#fff;border-bottom:1px solid var(--line);padding:25px 0}
    .metric-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1px}
    .metric{padding:10px 25px;border-right:1px solid var(--line)}
    .metric:last-child{border-right:0}
    .metric strong{display:block;font-size:28px;line-height:1.2}
    .metric strong span{color:var(--accent)}
    .metric small{color:var(--muted)}
    .latest{background:#fff}
    .poster-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:18px}
    .poster-card{min-width:0}
    .poster-image{aspect-ratio:2/2.75;border-radius:12px;overflow:hidden;background:#ddd;position:relative;box-shadow:0 4px 14px rgba(22,25,31,.08)}
    .poster-image img{height:100%;transition:.35s}
    .poster-card:hover img{transform:scale(1.055)}
    .poster-image:after{content:"";position:absolute;inset:45% 0 0;background:linear-gradient(transparent,rgba(0,0,0,.62))}
    .badge{position:absolute;z-index:1;top:9px;left:9px;padding:3px 7px;border-radius:5px;background:var(--accent);color:#fff;font-size:11px;font-weight:800}
    .score{position:absolute;z-index:2;right:9px;bottom:8px;color:#fff;font-weight:800}
    .poster-title{font-weight:800;margin-top:11px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
    .poster-meta{font-size:12px;color:var(--soft);display:flex;justify-content:space-between}
    .poster-meta b{color:var(--gold)}
    .scenes{background:#f0f2f5}
    .scene-grid{display:grid;grid-template-columns:1.35fr 1fr 1fr;gap:18px}
    .scene-card{min-height:235px;border-radius:var(--radius);padding:28px;background:var(--white);position:relative;overflow:hidden;border:1px solid var(--line);transition:.25s}
    .scene-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
    .scene-card.featured{background:var(--accent);color:#fff;grid-row:span 2;min-height:488px}
    .scene-card small{font-weight:800;color:var(--accent)}
    .featured small{color:#ffc0b9}
    .scene-card h3{font-size:24px;margin:18px 0 9px}
    .scene-card p{color:var(--muted);max-width:320px}
    .featured p{color:#ffe5e1}
    .scene-icon{position:absolute;right:22px;bottom:18px;font-size:62px;opacity:.14}
    .capability{background:#fff}
    .cap-grid{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--line);border-left:1px solid var(--line)}
    .cap{padding:26px;border-right:1px solid var(--line);border-bottom:1px solid var(--line);min-height:180px}
    .cap-no{color:var(--accent);font-weight:900;font-size:13px}
    .cap h3{font-size:18px;margin:13px 0 6px}
    .cap p{color:var(--muted);font-size:14px}
    .popular{background:#fff}
    .popular-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr;grid-template-rows:repeat(2,220px);gap:16px}
    .feature-content{grid-row:span 2}
    .feature-content,.small-content{position:relative;overflow:hidden;border-radius:var(--radius);color:#fff;background:#222}
    .feature-content img,.small-content img{height:100%;transition:.35s}
    .feature-content:hover img,.small-content:hover img{transform:scale(1.05)}
    .popular-overlay{position:absolute;inset:35% 0 0;padding:24px;background:linear-gradient(transparent,rgba(0,0,0,.84));display:flex;flex-direction:column;justify-content:end}
    .popular-overlay h3{font-size:22px}
    .small-content .popular-overlay{padding:16px}
    .small-content .popular-overlay h3{font-size:16px}
    .topics{background:var(--paper)}
    .topic-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:14px}
    .topic{padding:22px 18px;background:#fff;border:1px solid var(--line);border-radius:12px;transition:.2s}
    .topic:hover{border-color:#f0aaa3;box-shadow:var(--shadow)}
    .topic-mark{width:34px;height:34px;display:grid;place-items:center;background:#fff0ee;color:var(--accent);border-radius:9px;font-weight:900}
    .topic h3{font-size:17px;margin:14px 0 5px}
    .topic p{font-size:13px;color:var(--muted)}
    .ranking{background:var(--night);color:#fff}
    .ranking .section-intro{color:#aeb4bf}
    .rank-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 55px}
    .rank-item{display:grid;grid-template-columns:42px 1fr auto auto;align-items:center;gap:13px;padding:17px 0;border-bottom:1px solid rgba(255,255,255,.1)}
    .rank-num{font-size:22px;font-weight:900;color:#8b919d}
    .rank-item:nth-child(-n+3) .rank-num{color:#ff887d}
    .rank-title{font-weight:800}
    .rank-type{font-size:11px;color:#bfc4cb;border:1px solid #4b515c;border-radius:4px;padding:2px 6px}
    .rank-hot{font-size:13px;color:#ffb36e;white-space:nowrap}
    .cases{background:#fff}
    .case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
    .case{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:#fff}
    .case img{height:185px}
    .case-body{padding:21px}
    .case-tag{color:var(--mint);font-size:12px;font-weight:800}
    .case h3{font-size:19px;margin:8px 0}
    .case p{font-size:14px;color:var(--muted)}
    .case-result{display:flex;gap:23px;border-top:1px solid var(--line);margin-top:17px;padding-top:14px}
    .case-result strong{display:block;font-size:19px;color:var(--accent)}
    .case-result small{color:var(--soft)}
    .news{background:#f0f2f5}
    .news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
    .news-item{display:grid;grid-template-columns:105px 1fr;gap:16px;padding:14px;background:#fff;border:1px solid var(--line);border-radius:12px}
    .news-item img{height:90px;border-radius:8px}
    .news-item h3{font-size:15px;line-height:1.5;margin:4px 0}
    .news-item time{font-size:12px;color:var(--soft)}
    .safety{background:#fff}
    .safety-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
    .safety-item{padding:25px;background:#f8f9fa;border-radius:13px;border-left:3px solid var(--mint)}
    .safety-item h3{font-size:18px;margin-bottom:8px}
    .safety-item p{color:var(--muted);font-size:14px}
    .faq{background:var(--paper)}
    .faq-list{max-width:850px;margin:auto}
    details{background:#fff;border:1px solid var(--line);border-radius:11px;margin-bottom:11px;padding:0 20px}
    summary{cursor:pointer;list-style:none;padding:18px 0;font-weight:800;display:flex;justify-content:space-between}
    summary::-webkit-details-marker{display:none}
    summary:after{content:"+";color:var(--accent);font-size:22px}
    details[open] summary:after{content:"−"}
    details p{padding:0 25px 20px 0;color:var(--muted);font-size:14px}
    .closing{background:var(--accent);color:#fff;padding:62px 0}
    .closing-inner{display:flex;align-items:center;justify-content:space-between;gap:30px}
    .closing h2{font-size:33px}
    .closing p{color:#ffe2de;margin-top:8px}
    .closing .btn{background:#fff;color:var(--accent)}
    footer{background:#171a21;color:#bdc1c9;padding:55px 0 22px}
    .footer-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1fr;gap:35px;padding-bottom:38px}
    footer .brand-name{color:#fff}
    .footer-desc{font-size:13px;max-width:280px;margin-top:16px;color:#8f96a1}
    footer h3{color:#fff;font-size:15px;margin-bottom:14px}
    footer li{list-style:none;margin:8px 0;font-size:13px}
    footer li a:hover{color:#fff}
    .copyright{border-top:1px solid #30343c;padding-top:18px;color:#777e89;font-size:12px;display:flex;justify-content:space-between;gap:20px}
    @media(max-width:1024px){
      .poster-grid{grid-template-columns:repeat(4,1fr)}
      .poster-card:nth-child(n+9){display:none}
      .topic-grid{grid-template-columns:repeat(3,1fr)}
      .cap-grid{grid-template-columns:repeat(2,1fr)}
      .news-grid{grid-template-columns:repeat(2,1fr)}
    }
    @media(max-width:768px){
      .container,.hero-inner{width:min(100% - 28px,620px)}
      .nav-wrap{height:66px}
      nav,.nav-tools{display:none}
      .menu-toggle{display:block}
      header.open nav{display:flex;position:absolute;top:66px;left:14px;right:14px;background:#fff;border:1px solid var(--line);padding:10px;box-shadow:var(--shadow);border-radius:12px;flex-direction:column;align-items:stretch}
      header.open nav a{padding:12px 14px}
      .hero{min-height:580px}
      .hero-inner{padding:68px 0 60px}
      h1{font-size:42px}
      .hero-lead{font-size:15px}
      .metric-grid{grid-template-columns:repeat(2,1fr)}
      .metric{padding:10px 15px;border-bottom:1px solid var(--line)}
      section{padding:64px 0}
      .section-head{display:block}
      .section-head .text-link{display:inline-block;margin-top:15px}
      .poster-grid{grid-template-columns:repeat(3,1fr);gap:14px}
      .poster-card:nth-child(n+7){display:none}
      .scene-grid{grid-template-columns:1fr 1fr}
      .scene-card.featured{grid-row:auto;grid-column:span 2;min-height:280px}
      .popular-grid{grid-template-columns:1fr 1fr;grid-template-rows:230px 170px}
      .feature-content{grid-column:span 2;grid-row:auto}
      .rank-grid{grid-template-columns:1fr;gap:0}
      .case-grid,.safety-grid{grid-template-columns:1fr}
      .footer-grid{grid-template-columns:1fr 1fr}
      .closing-inner{display:block}
      .closing .btn{margin-top:22px}
    }
    @media(max-width:520px){
      .brand-name{font-size:16px}
      h1{font-size:36px}
      h2{font-size:26px}
      .hero-actions .btn{width:100%}
      .trust-line{gap:8px 16px}
      .poster-grid{grid-template-columns:repeat(2,1fr)}
      .poster-card:nth-child(n+5){display:none}
      .scene-grid,.topic-grid,.cap-grid,.news-grid{grid-template-columns:1fr}
      .scene-card.featured{grid-column:auto;min-height:260px}
      .popular-grid{grid-template-columns:1fr;grid-template-rows:240px 150px 150px}
      .feature-content{grid-column:auto}
      .small-content .popular-overlay h3{font-size:17px}
      .news-item{grid-template-columns:90px 1fr}
      .news-item img{height:82px}
      .footer-grid{grid-template-columns:1fr}
      .copyright{display:block}
      .copyright span{display:block;margin-top:7px}
    }