/* roulang page: index */
:root{
      --blue:#1857a6;--blue-dark:#103d78;--blue-soft:#edf5ff;--ink:#17304f;
      --muted:#687990;--line:#dce7f4;--coral:#e27d62;--paper:#fff;--mist:#f6f9fd;
      --shadow:0 16px 42px rgba(27,75,132,.10);--radius:18px
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;font-family:"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",Arial,sans-serif;color:var(--ink);background:var(--mist);line-height:1.75}
    a{text-decoration:none;color:inherit}
    img{display:block;max-width:100%}
    button,input,textarea{font:inherit}
    button{cursor:pointer}
    .container{width:min(1160px,calc(100% - 40px));margin:auto}
    .site-header{height:76px;background:rgba(255,255,255,.96);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:40;backdrop-filter:blur(12px)}
    .nav-wrap{height:76px;display:flex;align-items:center;justify-content:space-between;gap:28px}
    .logo{font-size:22px;font-weight:800;color:var(--blue-dark);letter-spacing:.02em;white-space:nowrap}
    .logo i{display:inline-block;width:9px;height:9px;border-radius:50%;background:var(--coral);margin:0 7px 3px 0}
    .nav-links{display:flex;align-items:center;gap:27px;font-size:14px;color:#52677f}
    .nav-links a{padding:8px 0;position:relative;transition:.25s}
    .nav-links a:hover,.nav-links a.active{color:var(--blue)}
    .nav-links a.active:after{content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--coral);border-radius:3px}
    .nav-cta,.btn-primary{background:var(--blue);color:#fff;border:0;border-radius:9px;padding:11px 19px;font-weight:700;transition:.25s;box-shadow:0 7px 18px rgba(24,87,166,.18)}
    .nav-cta:hover,.btn-primary:hover{background:var(--blue-dark);transform:translateY(-2px)}
    .nav-cta:focus-visible,.btn-primary:focus-visible,.btn-ghost:focus-visible,.menu-btn:focus-visible,input:focus-visible,textarea:focus-visible,summary:focus-visible{outline:3px solid rgba(226,125,98,.38);outline-offset:3px}
    .menu-btn{display:none;border:1px solid var(--line);background:#fff;color:var(--blue);border-radius:8px;padding:7px 10px}
    .hero{min-height:620px;position:relative;display:flex;align-items:center;background-image:linear-gradient(90deg,rgba(8,35,71,.88) 0%,rgba(10,54,102,.70) 52%,rgba(10,54,102,.25) 100%),url('/assets/images/5b511a0749281728.jpg');background-size:cover;background-position:center}
    .hero-content{width:min(1160px,calc(100% - 40px));margin:auto;color:#fff;padding:88px 0}
    .hero-kicker{display:inline-flex;align-items:center;gap:8px;color:#dbeaff;font-size:13px;border:1px solid rgba(255,255,255,.3);border-radius:20px;padding:5px 12px;margin-bottom:20px}
    .hero-kicker span{width:7px;height:7px;border-radius:50%;background:#ffb39e}
    h1{font-size:clamp(36px,5vw,64px);line-height:1.18;letter-spacing:-.04em;max-width:720px;margin:0 0 22px;font-weight:800}
    .hero p{font-size:17px;line-height:1.95;max-width:700px;color:#edf5ff;margin:0 0 30px}
    .hero-actions{display:flex;gap:12px;flex-wrap:wrap}
    .btn-ghost{display:inline-flex;align-items:center;justify-content:center;border:1px solid rgba(255,255,255,.58);color:#fff;border-radius:9px;padding:10px 19px;font-weight:700;transition:.25s}
    .btn-ghost:hover{background:#fff;color:var(--blue-dark)}
    .hero-note{margin-top:28px;display:flex;gap:24px;flex-wrap:wrap;color:#d5e6fa;font-size:13px}
    .hero-note strong{color:#fff;font-size:18px;display:block}
    .section{padding:86px 0}
    .section-alt{background:#fff}
    .section-head{display:flex;justify-content:space-between;align-items:end;gap:28px;margin-bottom:34px}
    .eyebrow{font-size:12px;font-weight:800;letter-spacing:.14em;color:var(--coral);text-transform:uppercase;margin-bottom:8px}
    h2{font-size:clamp(27px,3vw,40px);line-height:1.25;letter-spacing:-.025em;margin:0;color:var(--blue-dark)}
    .section-lead{max-width:650px;color:var(--muted);margin:12px 0 0;font-size:15px}
    .metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .metric{background:#fff;border:1px solid var(--line);border-radius:15px;padding:25px;box-shadow:var(--shadow);position:relative;overflow:hidden}
    .metric:before{content:"";position:absolute;left:0;top:0;width:5px;height:100%;background:var(--coral)}
    .metric .num{font-size:34px;font-weight:800;color:var(--blue);line-height:1;margin-bottom:12px}
    .metric h3{font-size:16px;margin:0 0 5px}.metric p{font-size:13px;color:var(--muted);margin:0}
    .matrix{display:grid;grid-template-columns:1.1fr .9fr .9fr;grid-template-rows:auto auto;gap:18px}
    .matrix-card,.feature-card,.topic-card,.info-panel,.quick-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:25px;box-shadow:0 10px 30px rgba(27,75,132,.07);transition:.25s}
    .matrix-card:hover,.feature-card:hover,.topic-card:hover,.quick-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#b9d1ee}
    .matrix-card.large{grid-row:span 2;background:linear-gradient(145deg,#f0f7ff,#fff)}
    .icon-box{width:42px;height:42px;border-radius:12px;display:grid;place-items:center;background:var(--blue-soft);color:var(--blue);font-weight:800;margin-bottom:18px}
    h3{font-size:19px;line-height:1.35;margin:0 0 9px;color:var(--blue-dark)}
    .matrix-card p,.feature-card p,.topic-card p{color:var(--muted);font-size:14px;margin:0 0 17px}
    .tag{display:inline-block;border-radius:6px;background:#f2f6fb;color:#53708e;font-size:12px;padding:4px 8px;margin:3px 4px 0 0}
    .text-link{color:var(--blue);font-size:13px;font-weight:700}.text-link:hover{color:var(--coral)}
    .compare{display:grid;grid-template-columns:1fr 1fr;gap:20px}
    .compare-box{border-radius:var(--radius);padding:28px;background:#fff;border:1px solid var(--line)}
    .compare-box.highlight{background:#f1f7ff;border-color:#c4dcf6}
    .compare-title{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line);padding-bottom:16px;margin-bottom:15px}
    .compare-title h3{margin:0}.badge{font-size:12px;padding:5px 9px;border-radius:6px;background:#fff0ec;color:#b85f4b}
    .compare-box ul{list-style:none;padding:0;margin:0}.compare-box li{padding:11px 0;border-bottom:1px dashed #dce6ef;font-size:14px;color:#526a83}.compare-box li:last-child{border:0}
    .compare-box li:before{content:"✓";color:var(--coral);font-weight:bold;margin-right:9px}
    .timeline{position:relative;display:grid;grid-template-columns:repeat(4,1fr);gap:28px;margin-top:20px}
    .timeline:before{content:"";position:absolute;left:6%;right:6%;top:13px;height:2px;background:#c9dced}
    .step{position:relative;padding-top:42px}.step:before{content:"";position:absolute;top:5px;left:0;width:18px;height:18px;border-radius:50%;background:var(--blue);border:5px solid #dbeaff;z-index:1}
    .step small{font-size:12px;color:var(--coral);font-weight:800}.step h3{font-size:16px;margin-top:8px}.step p{font-size:13px;color:var(--muted);margin:0}
    .topics{display:grid;grid-template-columns:1.4fr .8fr .8fr;gap:18px}
    .topic-card{min-height:280px;position:relative;overflow:hidden;background-size:cover;background-position:center;color:#fff;display:flex;flex-direction:column;justify-content:end}
    .topic-card:after{content:"";position:absolute;inset:0;background:linear-gradient(transparent 25%,rgba(7,33,66,.9))}
    .topic-card>*{position:relative;z-index:1}.topic-card h3{color:#fff}.topic-card p{color:#dcecff}
    .topic-card .tag{background:rgba(255,255,255,.18);color:#fff}
    .news-layout{display:grid;grid-template-columns:1.5fr .7fr;gap:22px}
    .news-list{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
    .news-item{display:flex;align-items:center;gap:20px;padding:20px 24px;border-bottom:1px solid var(--line);transition:.2s}
    .news-item:last-child{border:0}.news-item:hover{background:#f7fbff}
    .date{min-width:54px;color:var(--coral);font-weight:800;font-size:13px}.date b{display:block;font-size:23px;color:var(--blue-dark);line-height:1.1}
    .news-item h3{font-size:16px;margin:0 0 4px}.news-item p{font-size:13px;color:var(--muted);margin:0}
    .info-panel{background:var(--blue-dark);color:#fff}.info-panel h3{color:#fff}.info-panel p{color:#c9ddf4;font-size:14px}.info-line{padding:16px 0;border-bottom:1px solid rgba(255,255,255,.16);font-size:14px}.info-line:last-child{border:0}
    .info-line span{color:#9fc6ef;margin-right:9px;font-weight:800}
    .quick-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:15px}.quick-card{padding:20px}.quick-card h3{font-size:16px}.quick-card p{font-size:13px;color:var(--muted);margin:0}
    .faq-wrap{max-width:850px;margin:auto}.faq-item{background:#fff;border:1px solid var(--line);border-radius:12px;margin-bottom:12px;padding:0 20px}.faq-item[open]{border-color:#b9d1ee;box-shadow:0 8px 20px rgba(27,75,132,.06)}
    summary{cursor:pointer;list-style:none;padding:19px 0;font-weight:700;color:var(--blue-dark)}summary::-webkit-details-marker{display:none}summary:after{content:"+";float:right;color:var(--coral);font-size:22px}details[open] summary:after{content:"−"}.faq-answer{color:var(--muted);font-size:14px;padding:0 0 19px;max-width:760px}
    .form-section{background:#edf5ff}.form-box{background:#fff;border:1px solid #cfe0f2;border-radius:22px;padding:38px;display:grid;grid-template-columns:.85fr 1.15fr;gap:55px;box-shadow:var(--shadow)}
    .form-box h2{font-size:32px}.form-copy p{color:var(--muted);font-size:14px}.form-fields{display:grid;grid-template-columns:1fr 1fr;gap:14px}.field-full{grid-column:1/-1}.field label{display:block;font-size:13px;font-weight:700;margin-bottom:6px;color:var(--blue-dark)}input,textarea{width:100%;border:1px solid #cbdbea;border-radius:9px;padding:12px 13px;color:var(--ink);background:#fbfdff;transition:.2s}textarea{min-height:100px;resize:vertical}input:focus,textarea:focus{border-color:var(--blue);box-shadow:0 0 0 3px rgba(24,87,166,.10);outline:0}.form-submit{grid-column:1/-1;display:flex;align-items:center;gap:15px;flex-wrap:wrap}.privacy{font-size:12px;color:var(--muted)}.toast{display:none;background:#1c6b52;color:#fff;padding:10px 15px;border-radius:8px;font-size:13px}.toast.show{display:inline-block}
    .site-footer{background:#e8f1fb;border-top:1px solid #d3e2f1;padding:50px 0 24px}.footer-grid{display:grid;grid-template-columns:1.4fr .8fr .8fr;gap:50px;padding-bottom:35px}.footer-title{font-weight:800;font-size:20px;color:var(--blue-dark)}.footer-grid p,.footer-grid a{font-size:13px;color:#657b93}.footer-grid a{display:block;margin:7px 0}.footer-grid a:hover{color:var(--blue)}.copyright{border-top:1px solid #cbdceb;padding-top:18px;font-size:12px;color:#7890a8;display:flex;justify-content:space-between;gap:15px;flex-wrap:wrap}
    @media(max-width:900px){.nav-links{gap:15px}.metrics{grid-template-columns:repeat(2,1fr)}.matrix{grid-template-columns:1fr 1fr}.matrix-card.large{grid-row:auto;grid-column:span 2}.topics{grid-template-columns:1fr 1fr}.topic-card:first-child{grid-column:span 2}.news-layout{grid-template-columns:1fr}.quick-grid{grid-template-columns:repeat(2,1fr)}}
    @media(max-width:680px){.container,.hero-content{width:min(100% - 28px,1160px)}.site-header,.nav-wrap{height:66px}.nav-links{display:none;position:absolute;top:66px;left:14px;right:14px;background:#fff;padding:14px 20px;border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow);flex-direction:column;align-items:stretch;gap:5px}.nav-links.open{display:flex}.nav-links a{padding:10px 0}.nav-cta{margin-top:6px;text-align:center}.menu-btn{display:block}.hero{min-height:650px}.hero-content{padding:70px 0}.hero p{font-size:15px}.section{padding:60px 0}.section-head{display:block;margin-bottom:25px}.metrics,.matrix,.compare,.topics,.quick-grid{grid-template-columns:1fr}.matrix-card.large,.topic-card:first-child{grid-column:auto}.timeline{grid-template-columns:1fr;gap:20px;padding-left:25px}.timeline:before{left:7px;top:15px;bottom:15px;width:2px;height:auto}.step{padding-top:0;padding-left:20px}.step:before{left:-25px;top:3px}.news-item{padding:17px 15px;gap:12px}.form-box{grid-template-columns:1fr;padding:25px;gap:25px}.form-fields{grid-template-columns:1fr}.field-full,.form-submit{grid-column:auto}.footer-grid{grid-template-columns:1fr;gap:20px}.copyright{display:block}.copyright span{display:block;margin-top:6px}}