/* roulang page: index */
:root{
      --ink:#f4f7fb;
      --muted:#9aa8bc;
      --dim:#748197;
      --bg:#09111f;
      --panel:#101b2d;
      --panel-2:#142238;
      --line:rgba(175,196,224,.14);
      --cyan:#64e5d1;
      --yellow:#ffd36a;
      --pink:#ff8fa3;
      --white:#ffffff;
      --radius:18px;
      --shadow:0 18px 55px rgba(0,0,0,.26);
      --container:1180px;
    }
    *{box-sizing:border-box;margin:0;padding:0}
    html{scroll-behavior:smooth}
    body{font-family:"Noto Sans SC",Arial,sans-serif;background:var(--bg);color:var(--ink);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{cursor:pointer}
    .container{width:min(var(--container),calc(100% - 48px));margin:0 auto}
    .site-header{position:sticky;top:0;z-index:20;background:rgba(9,17,31,.88);backdrop-filter:blur(18px);border-bottom:1px solid var(--line)}
    .nav-wrap{height:76px;display:flex;align-items:center;justify-content:space-between;gap:28px}
    .brand{display:flex;align-items:center;gap:12px;min-width:max-content}
    .brand-mark{width:38px;height:38px;border-radius:11px;background:var(--cyan);color:#07131c;display:grid;place-items:center;font-weight:800;font-size:17px;box-shadow:0 8px 25px rgba(100,229,209,.2)}
    .brand-name{font-size:17px;font-weight:800;letter-spacing:0}
    .brand-name span{color:var(--cyan)}
    .nav-links{display:flex;align-items:center;gap:6px}
    .nav-links a{padding:9px 13px;color:var(--muted);border-radius:10px;transition:.25s}
    .nav-links a:hover,.nav-links a.active{color:var(--ink);background:rgba(255,255,255,.08)}
    .nav-search{display:flex;align-items:center;gap:8px;color:var(--muted);border:1px solid var(--line);border-radius:12px;padding:8px 12px}
    .nav-search input{width:112px;background:none;border:0;outline:0;color:var(--ink);font-size:13px}
    .menu-btn{display:none;background:none;border:1px solid var(--line);color:var(--ink);border-radius:10px;padding:8px 11px}
    .hero{position:relative;overflow:hidden;padding:88px 0 76px;background:#0b1525 url("https://images.unsplash.com/photo-1489599849927-2ee91cede3ba?auto=format&fit=crop&w=1800&q=88") center/cover}
    .hero:before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(7,14,26,.98) 0%,rgba(7,14,26,.84) 48%,rgba(7,14,26,.32) 100%)}
    .hero-grid{position:relative;display:grid;grid-template-columns:1.08fr .92fr;gap:70px;align-items:center}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--cyan);font-size:13px;font-weight:700;letter-spacing:.04em;margin-bottom:18px}
    .eyebrow:before{content:"";width:25px;height:2px;background:var(--cyan)}
    h1{font-size:clamp(40px,5vw,68px);line-height:1.13;letter-spacing:0;font-weight:800;max-width:690px}
    h1 em{font-style:normal;color:var(--yellow)}
    .hero-copy{color:#c5cfdd;font-size:16px;line-height:2;max-width:650px;margin:24px 0 29px}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid transparent;border-radius:11px;padding:12px 19px;font-weight:700;transition:.25s}
    .btn-primary{background:var(--cyan);color:#07151d;box-shadow:0 10px 28px rgba(100,229,209,.18)}
    .btn-primary:hover{background:#8af2e2;transform:translateY(-2px)}
    .btn-ghost{background:rgba(255,255,255,.06);border-color:var(--line);color:var(--ink)}
    .btn-ghost:hover{background:rgba(255,255,255,.13);border-color:rgba(255,255,255,.3)}
    .hero-note{display:flex;gap:24px;margin-top:32px;color:var(--muted);font-size:13px}
    .hero-note strong{display:block;color:var(--ink);font-size:20px;line-height:1.2}
    .hero-board{background:rgba(13,27,46,.86);border:1px solid rgba(172,204,230,.2);border-radius:22px;padding:24px;box-shadow:var(--shadow)}
    .board-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:18px}
    .board-head h2{font-size:18px}
    .live-dot{font-size:12px;color:var(--cyan);display:flex;gap:7px;align-items:center}
    .live-dot:before{content:"";width:7px;height:7px;border-radius:50%;background:var(--cyan);box-shadow:0 0 0 5px rgba(100,229,209,.12)}
    .board-row{display:grid;grid-template-columns:28px 1fr auto;gap:12px;align-items:center;padding:14px 0;border-top:1px solid var(--line)}
    .board-row:first-of-type{border-top:0}
    .rank{font-size:19px;color:var(--yellow);font-weight:800}
    .board-title{font-weight:600}
    .board-meta{font-size:12px;color:var(--muted)}
    .score{font-size:13px;color:var(--yellow)}
    section{padding:82px 0;border-bottom:1px solid var(--line)}
    .section-head{display:flex;justify-content:space-between;align-items:end;gap:24px;margin-bottom:30px}
    .section-kicker{color:var(--cyan);font-size:12px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;margin-bottom:7px}
    h2{font-size:30px;line-height:1.25;letter-spacing:0}
    .section-desc{max-width:600px;color:var(--muted);line-height:1.9}
    .text-link{color:var(--cyan);font-size:14px;font-weight:700;white-space:nowrap}
    .text-link:hover{text-decoration:underline}
    .search-section{background:#0c1728;padding:28px 0}
    .search-bar{display:flex;align-items:center;gap:16px;max-width:850px;margin:auto;background:var(--panel);border:1px solid var(--line);padding:10px;border-radius:15px}
    .search-icon{font-size:20px;color:var(--cyan);padding-left:9px}
    .search-bar input{flex:1;min-width:0;border:0;background:none;outline:0;color:var(--ink);font-size:15px}
    .search-bar input::placeholder{color:var(--dim)}
    .category-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:14px}
    .category{padding:22px 18px;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);transition:.25s}
    .category:hover{transform:translateY(-4px);border-color:rgba(100,229,209,.5);box-shadow:var(--shadow)}
    .category-icon{width:40px;height:40px;border-radius:12px;display:grid;place-items:center;font-size:18px;margin-bottom:17px;background:rgba(100,229,209,.13);color:var(--cyan)}
    .category:nth-child(2) .category-icon{background:rgba(255,211,106,.14);color:var(--yellow)}
    .category:nth-child(3) .category-icon{background:rgba(255,143,163,.14);color:var(--pink)}
    .category h3{font-size:17px;margin-bottom:8px}
    .category p{color:var(--muted);font-size:13px;line-height:1.75}
    .content-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
    .content-card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:.25s}
    .content-card:hover{transform:translateY(-5px);border-color:rgba(100,229,209,.45);box-shadow:var(--shadow)}
    .poster{height:205px;position:relative;overflow:hidden}
    .poster img{height:100%;transition:.4s}
    .content-card:hover .poster img{transform:scale(1.05)}
    .poster:after{content:"";position:absolute;inset:45% 0 0;background:linear-gradient(transparent,rgba(5,12,22,.8))}
    .badge{position:absolute;top:12px;left:12px;z-index:1;padding:4px 8px;border-radius:6px;background:var(--cyan);color:#08151d;font-size:11px;font-weight:800}
    .badge.gold{background:var(--yellow)}
    .badge.rose{background:var(--pink)}
    .card-body{padding:15px 16px 17px}
    .card-body h3{font-size:16px;margin-bottom:8px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
    .card-body p{font-size:13px;color:var(--muted);line-height:1.65;min-height:43px}
    .card-foot{display:flex;justify-content:space-between;align-items:center;margin-top:12px;color:var(--muted);font-size:12px}
    .rating{color:var(--yellow);font-weight:700}
    .feature-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:22px}
    .feature-main{min-height:390px;border-radius:20px;overflow:hidden;position:relative;background:url("https://images.unsplash.com/photo-1517604931442-7e0c8ed2963c?auto=format&fit=crop&w=1200&q=85") center/cover}
    .feature-main:after{content:"";position:absolute;inset:0;background:linear-gradient(0deg,rgba(5,12,22,.95),rgba(5,12,22,.08) 70%)}
    .feature-copy{position:absolute;z-index:1;bottom:26px;left:28px;right:28px}
    .feature-copy h3{font-size:27px;margin:10px 0 7px}
    .feature-copy p{color:#c1cad6;max-width:500px}
    .side-list{display:flex;flex-direction:column;gap:12px}
    .side-item{display:grid;grid-template-columns:94px 1fr;gap:14px;align-items:center;padding:10px;background:var(--panel);border:1px solid var(--line);border-radius:14px}
    .side-item img{height:82px;border-radius:9px}
    .side-item h3{font-size:15px;margin-bottom:5px}
    .side-item p{font-size:12px;line-height:1.55;color:var(--muted)}
    .latest-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
    .latest-item{display:flex;gap:15px;padding:15px;background:var(--panel);border:1px solid var(--line);border-radius:14px}
    .latest-item img{width:118px;height:100px;border-radius:10px}
    .latest-item h3{font-size:15px;margin:3px 0 6px}
    .latest-item p{font-size:12px;color:var(--muted);line-height:1.6}
    .rank-layout{display:grid;grid-template-columns:1fr 1fr;gap:26px}
    .ranking-list{background:var(--panel);border:1px solid var(--line);border-radius:18px;padding:7px 20px}
    .ranking-item{display:grid;grid-template-columns:42px 1fr 80px 52px;gap:12px;align-items:center;padding:14px 0;border-bottom:1px solid var(--line)}
    .ranking-item:last-child{border-bottom:0}
    .ranking-number{font-size:20px;color:var(--dim);font-weight:800}
    .ranking-item:nth-child(-n+3) .ranking-number{color:var(--yellow)}
    .ranking-name{font-weight:600}
    .ranking-type{font-size:11px;color:var(--cyan);border:1px solid rgba(100,229,209,.3);border-radius:5px;padding:2px 5px;width:max-content}
    .heat{color:var(--muted);font-size:12px}
    .rank-score{color:var(--yellow);font-size:13px}
    .resource-band{background:#101c2d}
    .resource-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .resource{padding:24px;background:#142238;border:1px solid var(--line);border-radius:16px}
    .resource strong{display:flex;justify-content:space-between;font-size:18px;margin-bottom:10px}
    .resource strong span{color:var(--cyan);font-size:23px}
    .resource p{color:var(--muted);font-size:13px;line-height:1.8}
    .quote-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
    .quote{padding:25px;background:var(--panel);border:1px solid var(--line);border-radius:17px}
    .quote-mark{font-size:30px;color:var(--cyan);line-height:1}
    .quote p{color:#c5cfdd;line-height:1.9;margin:10px 0 18px}
    .quote cite{font-style:normal;color:var(--muted);font-size:13px}
    .compare{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:var(--line);border:1px solid var(--line);border-radius:18px;overflow:hidden}
    .compare-col{padding:28px;background:var(--panel)}
    .compare-col:last-child{background:#14283a}
    .compare-col h3{font-size:19px;margin-bottom:17px}
    .compare-col:last-child h3{color:var(--cyan)}
    .compare-col li{list-style:none;color:var(--muted);padding:10px 0;border-bottom:1px solid var(--line)}
    .compare-col li:before{content:"•";color:var(--cyan);margin-right:10px}
    .news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
    .news-card{display:grid;grid-template-columns:112px 1fr;gap:14px;padding:12px;background:var(--panel);border:1px solid var(--line);border-radius:14px}
    .news-card img{height:91px;border-radius:9px}
    .news-card time{font-size:11px;color:var(--cyan)}
    .news-card h3{font-size:14px;line-height:1.55;margin-top:5px}
    .faq-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
    details{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:18px 20px}
    summary{cursor:pointer;font-weight:700;list-style:none;position:relative;padding-right:24px}
    summary::-webkit-details-marker{display:none}
    summary:after{content:"+";position:absolute;right:0;color:var(--cyan);font-size:20px;top:-3px}
    details[open] summary:after{content:"−"}
    details p{color:var(--muted);font-size:13px;line-height:1.85;margin-top:12px}
    .final-section{padding:65px 0;background:#101d2d}
    .final-box{display:flex;align-items:center;justify-content:space-between;gap:30px}
    .final-box h2{max-width:650px}
    .final-box p{color:var(--muted);margin-top:8px}
    footer{padding:48px 0 24px;background:#07101c}
    .footer-grid{display:grid;grid-template-columns:1.5fr repeat(3,1fr);gap:36px;padding-bottom:36px}
    .footer-brand p{color:var(--muted);font-size:13px;line-height:1.8;max-width:300px;margin-top:14px}
    .footer-col h3{font-size:14px;margin-bottom:14px}
    .footer-col a{display:block;color:var(--muted);font-size:13px;margin:8px 0;transition:.2s}
    .footer-col a:hover{color:var(--cyan)}
    .copyright{border-top:1px solid var(--line);padding-top:20px;color:var(--dim);font-size:12px;display:flex;justify-content:space-between;gap:20px}
    :focus-visible{outline:3px solid rgba(100,229,209,.6);outline-offset:3px}
    @media(max-width:1024px){
      .nav-links{gap:0}.nav-links a{padding:8px 9px;font-size:13px}.nav-search{display:none}
      .hero-grid{gap:35px}.category-grid{grid-template-columns:repeat(3,1fr)}
      .content-grid{grid-template-columns:repeat(3,1fr)}.latest-grid{grid-template-columns:repeat(2,1fr)}
    }
    @media(max-width:768px){
      .container{width:min(var(--container),calc(100% - 32px))}
      .nav-wrap{height:68px}.menu-btn{display:block}.nav-links{display:none;position:absolute;left:16px;right:16px;top:76px;flex-direction:column;align-items:stretch;background:#101d30;border:1px solid var(--line);border-radius:14px;padding:8px;box-shadow:var(--shadow)}
      .nav-links.open{display:flex}.nav-links a{padding:11px 13px}
      .hero{padding:65px 0 58px}.hero-grid,.feature-grid,.rank-layout{grid-template-columns:1fr}
      .hero-board{max-width:560px}.section-head{display:block}.section-desc{margin-top:12px}.section-head .text-link{display:inline-block;margin-top:14px}
      .content-grid{grid-template-columns:repeat(2,1fr)}.category-grid{grid-template-columns:repeat(2,1fr)}
      .quote-grid,.news-grid,.resource-grid{grid-template-columns:1fr 1fr}.final-box{display:block}.final-box .btn{margin-top:20px}
      .footer-grid{grid-template-columns:1.5fr 1fr 1fr}
    }
    @media(max-width:520px){
      body{font-size:14px}h1{font-size:39px}h2{font-size:25px}
      .hero-copy{font-size:14px;line-height:1.85}.hero-note{gap:16px}.hero-actions .btn{width:100%}
      section{padding:59px 0}.category-grid,.content-grid,.latest-grid,.quote-grid,.news-grid,.resource-grid,.faq-grid{grid-template-columns:1fr}
      .poster{height:225px}.ranking-list{padding:5px 13px}.ranking-item{grid-template-columns:32px 1fr 44px}
      .ranking-item .ranking-type{display:none}.ranking-item .heat{display:none}
      .compare{grid-template-columns:1fr}.compare-col{padding:22px}
      .footer-grid{grid-template-columns:1fr 1fr;gap:25px}.footer-brand{grid-column:1/-1}
      .copyright{display:block}.copyright span{display:block;margin-top:8px}
    }