/* roulang page: index */
:root{
      --navy:#102a43;
      --blue:#2474d2;
      --blue-dark:#1658a6;
      --cyan:#32b6c9;
      --ink:#18324a;
      --muted:#6b7f91;
      --paper:#f5f8fc;
      --white:#ffffff;
      --line:#dce7f1;
      --soft:#eaf3fb;
      --gold:#e6ae54;
      --green:#2e9b78;
      --radius:16px;
      --shadow:0 14px 40px rgba(28,70,110,.10);
      --shadow-hover:0 20px 46px rgba(28,70,110,.18);
    }
    *{box-sizing:border-box;margin:0;padding:0}
    html{scroll-behavior:smooth}
    body{font-family:"PingFang SC","Microsoft YaHei",Arial,sans-serif;line-height:1.7;color:var(--ink);background:var(--paper);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(36,116,210,.32);outline-offset:3px}
    .container{width:min(1180px,calc(100% - 48px));margin:0 auto}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--blue);font-size:12px;font-weight:800;letter-spacing:1.4px;text-transform:uppercase}
    .eyebrow:before{content:"";width:24px;height:2px;background:var(--cyan)}
    .section{padding:92px 0}
    .section.alt{background:#edf5fb}
    .section-head{display:flex;justify-content:space-between;align-items:end;gap:30px;margin-bottom:34px}
    .section-head h2{font-size:clamp(25px,3vw,38px);line-height:1.25;letter-spacing:0;font-weight:800;color:var(--navy);margin-top:10px}
    .section-head p{max-width:570px;color:var(--muted);font-size:15px}
    .more-link{color:var(--blue);font-weight:700;white-space:nowrap}
    .more-link:hover{color:var(--blue-dark)}
    .topbar{background:var(--navy);color:#d5e5f3;font-size:12px}
    .topbar .container{height:34px;display:flex;align-items:center;justify-content:space-between}
    .topbar strong{color:#fff}
    .header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.94);backdrop-filter:blur(14px);border-bottom:1px solid rgba(220,231,241,.85)}
    .nav-wrap{height:78px;display:flex;align-items:center;justify-content:space-between;gap:24px}
    .brand{display:flex;align-items:center;gap:12px;min-width:max-content}
    .brand-mark{width:38px;height:38px;border-radius:10px;background:var(--blue);color:#fff;display:grid;place-items:center;font-size:18px;font-weight:900;box-shadow:0 8px 18px rgba(36,116,210,.22)}
    .brand-name{font-size:18px;font-weight:900;color:var(--navy);letter-spacing:0}
    .nav{display:flex;align-items:center;gap:5px}
    .nav a{padding:10px 13px;border-radius:8px;color:#52697c;font-weight:700;font-size:14px;transition:.2s}
    .nav a:hover,.nav a.active{color:var(--blue);background:var(--soft)}
    .header-action{display:inline-flex;align-items:center;gap:8px;padding:11px 17px;background:var(--navy);color:#fff;border-radius:9px;font-weight:800;font-size:13px;transition:.2s}
    .header-action:hover{background:var(--blue)}
    .menu-toggle{display:none;background:transparent;color:var(--navy);font-size:25px;padding:5px}
    .hero{position:relative;overflow:hidden;background:var(--navy);color:#fff;padding:88px 0 78px}
    .hero:before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(16,42,67,.97) 0%,rgba(16,42,67,.86) 45%,rgba(16,42,67,.35) 100%),url("https://images.unsplash.com/photo-1485846234645-a62644f84728?auto=format&fit=crop&w=1900&q=86") center/cover}
    .hero-content{position:relative;z-index:1;display:grid;grid-template-columns:1.1fr .9fr;gap:56px;align-items:center}
    .hero h1{font-size:clamp(32px,5vw,62px);line-height:1.16;letter-spacing:0;font-weight:900;max-width:700px}
    .hero h1 em{font-style:normal;color:#59d6dd}
    .hero-copy{margin-top:22px;max-width:700px;color:#d5e6f3;font-size:16px;line-height:1.9}
    .hero-buttons{display:flex;gap:12px;flex-wrap:wrap;margin-top:30px}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 20px;border-radius:9px;font-weight:800;transition:.22s;border:1px solid transparent}
    .btn-primary{background:#38bdc9;color:#062b42;box-shadow:0 8px 20px rgba(50,182,201,.2)}
    .btn-primary:hover{background:#67d9e0;transform:translateY(-2px)}
    .btn-outline{border-color:rgba(255,255,255,.42);color:#fff;background:rgba(255,255,255,.07)}
    .btn-outline:hover{background:#fff;color:var(--navy)}
    .hero-panel{background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.22);border-radius:18px;padding:25px;backdrop-filter:blur(10px)}
    .progress-line{display:flex;justify-content:space-between;align-items:end;margin-bottom:15px}
    .progress-line strong{font-size:30px;color:#fff}
    .progress-line span{color:#bcd1e0;font-size:13px}
    .progress{height:8px;background:rgba(255,255,255,.17);border-radius:99px;overflow:hidden}
    .progress i{display:block;width:78%;height:100%;background:#51d3d7;border-radius:99px}
    .hero-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:25px}
    .hero-stat{padding-top:15px;border-top:1px solid rgba(255,255,255,.2)}
    .hero-stat b{display:block;color:#fff;font-size:19px}
    .hero-stat span{color:#bcd1e0;font-size:12px}
    .triple-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
    .feature{background:#fff;border:1px solid var(--line);padding:25px;border-radius:var(--radius);box-shadow:var(--shadow);transition:.25s}
    .feature:hover{transform:translateY(-5px);box-shadow:var(--shadow-hover)}
    .feature-icon{width:42px;height:42px;border-radius:11px;background:var(--soft);color:var(--blue);display:grid;place-items:center;font-size:20px;margin-bottom:18px}
    .feature h3{font-size:19px;margin-bottom:9px;color:var(--navy)}
    .feature p{font-size:14px;color:var(--muted)}
    .matrix{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .matrix a{display:flex;align-items:center;justify-content:space-between;padding:20px;background:#fff;border:1px solid var(--line);border-radius:12px;transition:.2s}
    .matrix a:hover{border-color:var(--blue);box-shadow:var(--shadow);color:var(--blue);transform:translateY(-3px)}
    .matrix b{display:block;font-size:16px;color:var(--navy)}
    .matrix span{display:block;color:var(--muted);font-size:12px;margin-top:3px}
    .matrix i{font-style:normal;color:var(--blue);font-size:20px}
    .media-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
    .media-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:.25s}
    .media-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-hover)}
    .media-image{height:235px;position:relative;overflow:hidden}
    .media-image img{height:100%;transition:.4s}
    .media-card:hover .media-image img{transform:scale(1.05)}
    .badge{position:absolute;left:12px;top:12px;background:#fff;color:var(--blue);font-size:11px;font-weight:900;border-radius:5px;padding:4px 7px}
    .media-info{padding:17px}
    .media-info h3{font-size:16px;color:var(--navy);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
    .media-meta{display:flex;align-items:center;justify-content:space-between;margin-top:10px;color:var(--muted);font-size:12px}
    .rating{color:#c58728;font-weight:900}
    .topic-layout{display:grid;grid-template-columns:1.3fr .7fr;gap:22px}
    .topic-large{min-height:350px;border-radius:var(--radius);padding:28px;display:flex;align-items:end;color:#fff;background:linear-gradient(0deg,rgba(10,36,59,.92),rgba(10,36,59,.08)),url("https://images.unsplash.com/photo-1517604931442-7e0c8ed2963c?auto=format&fit=crop&w=1100&q=85") center/cover}
    .topic-large h3{font-size:26px;line-height:1.3;margin:8px 0}
    .topic-large p{color:#d5e6f3;max-width:520px;font-size:14px}
    .topic-small{display:grid;grid-template-columns:110px 1fr;gap:15px;padding:14px;background:#fff;border:1px solid var(--line);border-radius:12px;margin-bottom:14px}
    .topic-small img{height:91px;border-radius:8px}
    .topic-small h3{font-size:16px;color:var(--navy);line-height:1.35}
    .topic-small p{font-size:12px;color:var(--muted);margin-top:5px}
    .news-layout{display:grid;grid-template-columns:1.1fr .9fr;gap:30px}
    .news-list{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:8px 22px}
    .news-item{display:grid;grid-template-columns:105px 1fr auto;gap:16px;align-items:center;padding:16px 0;border-bottom:1px solid var(--line)}
    .news-item:last-child{border-bottom:0}
    .news-item img{height:70px;border-radius:8px}
    .news-item h3{font-size:15px;color:var(--navy);line-height:1.45}
    .news-item p{font-size:12px;color:var(--muted);margin-top:4px}
    .news-date{font-size:12px;color:var(--muted);white-space:nowrap}
    .ranking{background:var(--navy);border-radius:var(--radius);padding:22px;color:#fff}
    .ranking h3{font-size:20px;margin-bottom:10px}
    .rank-item{display:grid;grid-template-columns:28px 1fr auto;align-items:center;gap:10px;padding:11px 0;border-bottom:1px solid rgba(255,255,255,.12)}
    .rank-item:last-child{border-bottom:0}
    .rank-no{color:#62d2d8;font-weight:900}
    .rank-name{font-size:13px}
    .rank-score{font-size:12px;color:#b9d0df}
    .data-band{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
    .data-grid{display:grid;grid-template-columns:repeat(4,1fr)}
    .data-cell{padding:31px 24px;border-right:1px solid var(--line)}
    .data-cell:last-child{border-right:0}
    .data-cell strong{display:block;font-size:32px;color:var(--blue);line-height:1.2}
    .data-cell span{color:var(--muted);font-size:13px}
    .reviews{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
    .review{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:23px;box-shadow:0 8px 25px rgba(28,70,110,.06)}
    .review-top{display:flex;align-items:center;gap:11px;margin-bottom:14px}
    .avatar{width:38px;height:38px;border-radius:50%;background:var(--soft);color:var(--blue);display:grid;place-items:center;font-weight:900}
    .review b{font-size:14px;color:var(--navy)}
    .review small{display:block;color:var(--muted);font-size:11px}
    .review p{font-size:14px;color:#52697c;line-height:1.8}
    .review .stars{color:var(--gold);font-size:13px;margin-top:13px}
    .faq-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:15px}
    .faq{background:#fff;border:1px solid var(--line);border-radius:12px;padding:21px}
    .faq h3{font-size:16px;color:var(--navy);margin-bottom:8px}
    .faq p{font-size:13px;color:var(--muted)}
    .contact{background:var(--navy);color:#fff;padding:54px;border-radius:20px;display:flex;align-items:center;justify-content:space-between;gap:30px}
    .contact h2{font-size:30px;line-height:1.3;margin-top:9px}
    .contact p{color:#c4d8e6;margin-top:12px;max-width:650px}
    .contact .eyebrow{color:#59d6dd}
    .footer{background:#0b2135;color:#a9c0d0;padding:55px 0 24px}
    .footer-grid{display:grid;grid-template-columns:1.4fr repeat(3,1fr);gap:34px;padding-bottom:45px}
    .footer .brand-name{color:#fff}
    .footer-brand p{font-size:13px;line-height:1.8;margin-top:16px;max-width:280px}
    .footer h3{font-size:14px;color:#fff;margin-bottom:14px}
    .footer a{display:block;color:#a9c0d0;font-size:13px;margin:8px 0}
    .footer a:hover{color:#59d6dd}
    .copyright{border-top:1px solid rgba(255,255,255,.12);padding-top:20px;font-size:12px;display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap}
    .notice{color:#7f9bad}
    @media(max-width:1024px){
      .container{width:min(100% - 36px,900px)}
      .nav{gap:0}.nav a{padding:9px 8px;font-size:13px}
      .hero-content{grid-template-columns:1fr;gap:34px}.hero-panel{max-width:600px}
      .media-grid{grid-template-columns:repeat(3,1fr)}
      .matrix{grid-template-columns:repeat(2,1fr)}
      .topic-layout,.news-layout{grid-template-columns:1fr}
    }
    @media(max-width:768px){
      .section{padding:67px 0}.section-head{display:block}.section-head p{margin-top:12px}
      .header-action{display:none}.menu-toggle{display:block}
      .nav{display:none;position:absolute;top:78px;left:0;right:0;background:#fff;border-bottom:1px solid var(--line);padding:10px 18px;box-shadow:var(--shadow)}
      .nav.open{display:flex;flex-direction:column;align-items:stretch}
      .nav a{display:block;padding:12px 14px}
      .triple-grid,.reviews{grid-template-columns:1fr}
      .media-grid{grid-template-columns:repeat(2,1fr);gap:14px}
      .media-image{height:210px}
      .data-grid{grid-template-columns:repeat(2,1fr)}
      .data-cell:nth-child(2){border-right:0}.data-cell:nth-child(-n+2){border-bottom:1px solid var(--line)}
      .contact{display:block;padding:35px 26px}.contact .btn{margin-top:24px}
      .footer-grid{grid-template-columns:1.5fr 1fr 1fr}
      .footer-grid>div:last-child{grid-column:2}
    }
    @media(max-width:520px){
      .container{width:calc(100% - 28px)}
      .topbar .container{height:auto;padding:8px 0;display:block}
      .topbar span{display:block;margin-top:2px}
      .nav-wrap{height:68px}.nav{top:68px}
      .brand-name{font-size:15px}.brand-mark{width:34px;height:34px}
      .hero{padding:62px 0 55px}.hero h1{font-size:35px}
      .hero-copy{font-size:14px}.hero-buttons .btn{width:100%}
      .hero-stats{gap:8px}.hero-stat b{font-size:16px}
      .matrix{grid-template-columns:1fr}
      .media-grid{grid-template-columns:1fr 1fr}
      .media-image{height:165px}.media-info{padding:12px}.media-info h3{font-size:14px}
      .topic-large{min-height:290px;padding:22px}.topic-large h3{font-size:22px}
      .news-item{grid-template-columns:76px 1fr}.news-item img{height:58px}.news-date{display:none}
      .faq-grid{grid-template-columns:1fr}
      .footer-grid{grid-template-columns:1fr 1fr;gap:26px}.footer-brand{grid-column:1/-1}
      .footer-grid>div:last-child{grid-column:auto}
      .copyright{display:block}.copyright .notice{margin-top:8px}
    }