/* roulang page: index */
:root{
      --ink:#17212b;
      --muted:#667481;
      --soft:#f4f7f8;
      --paper:#ffffff;
      --line:#e3e9eb;
      --brand:#0b8078;
      --brand-dark:#08635f;
      --accent:#e89b4d;
      --accent-soft:#fff4e7;
      --dark:#102c32;
      --radius:16px;
      --shadow:0 16px 40px rgba(16,44,50,.08);
      --container: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}
    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% - 40px));margin:0 auto}
    .site-header{height:76px;display:flex;align-items:center;border-bottom:1px solid var(--line);background:rgba(255,255,255,.94);position:sticky;top:0;z-index:20;backdrop-filter:blur(14px)}
    .nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:30px}
    .brand{display:flex;align-items:center;gap:11px;font-size:17px;font-weight:800;white-space:nowrap}
    .brand-mark{width:38px;height:38px;border-radius:11px;background:var(--brand);display:grid;place-items:center;color:#fff;font-weight:900;box-shadow:0 7px 16px rgba(11,128,120,.22)}
    .brand-mark span{font-size:18px}
    .nav{display:flex;align-items:center;gap:25px;color:var(--muted);font-size:14px}
    .nav a{padding:8px 0;border-bottom:2px solid transparent;transition:.2s}
    .nav a:hover,.nav a.active{color:var(--brand);border-color:var(--brand)}
    .nav-cta{background:var(--dark);color:#fff!important;padding:9px 17px!important;border-radius:9px;border:0!important}
    .nav-cta:hover{background:var(--brand)}
    .menu-toggle{display:none;border:0;background:var(--soft);border-radius:8px;padding:8px 11px;color:var(--dark)}
    .hero{background:#edf7f5;padding:76px 0 68px;overflow:hidden}
    .hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:60px;align-items:center}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--brand);font-size:13px;font-weight:800;letter-spacing:.03em;margin-bottom:18px}
    .eyebrow:before{content:"";width:8px;height:8px;background:var(--accent);border-radius:50%}
    h1{font-size:clamp(35px,4.4vw,62px);line-height:1.14;letter-spacing:0;font-weight:900;max-width:680px}
    h1 em{font-style:normal;color:var(--brand)}
    .hero-lead{font-size:18px;color:var(--muted);max-width:650px;margin:22px 0 28px}
    .hero-actions{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid transparent;border-radius:10px;padding:12px 20px;font-weight:700;font-size:14px;transition:.2s}
    .btn-primary{background:var(--brand);color:#fff;box-shadow:0 8px 18px rgba(11,128,120,.2)}
    .btn-primary:hover{background:var(--brand-dark);transform:translateY(-2px)}
    .btn-light{background:#fff;border-color:var(--line);color:var(--ink)}
    .btn-light:hover{border-color:var(--brand);color:var(--brand)}
    .hero-note{font-size:13px;color:#72818a;margin-top:17px}
    .signal-board{background:var(--dark);border-radius:20px;padding:25px;color:#fff;box-shadow:var(--shadow)}
    .signal-top{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid rgba(255,255,255,.15);padding-bottom:18px;margin-bottom:20px}
    .signal-top strong{font-size:16px}
    .live{display:flex;align-items:center;gap:7px;font-size:12px;color:#a8e7d8}
    .live i{width:7px;height:7px;background:#71d6ac;border-radius:50%;display:block}
    .icon-matrix{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}
    .icon-cell{min-height:82px;border:1px solid rgba(255,255,255,.12);background:rgba(255,255,255,.06);border-radius:12px;padding:13px 10px}
    .icon-cell b{display:block;color:#f4c18b;font-size:21px;margin-bottom:4px}
    .icon-cell span{font-size:12px;color:#bbcbce}
    .status-line{display:flex;justify-content:space-between;gap:15px;margin-top:20px;padding-top:17px;border-top:1px solid rgba(255,255,255,.15);font-size:12px;color:#b9c9cc}
    .status-line strong{color:#fff}
    section{padding:78px 0}
    .section-head{display:flex;justify-content:space-between;align-items:end;gap:30px;margin-bottom:30px}
    .section-kicker{color:var(--brand);font-size:12px;font-weight:800;letter-spacing:.08em;text-transform:uppercase;margin-bottom:7px}
    h2{font-size:30px;line-height:1.25;letter-spacing:0}
    .section-desc{color:var(--muted);font-size:14px;max-width:580px}
    .section-link{color:var(--brand);font-size:14px;font-weight:700;white-space:nowrap}
    .section-link:hover{text-decoration:underline}
    .matrix-section{background:#fff}
    .entry-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .entry{border:1px solid var(--line);padding:21px;border-radius:14px;min-height:150px;transition:.2s;background:#fff}
    .entry:hover{transform:translateY(-4px);border-color:#a9d7d1;box-shadow:var(--shadow)}
    .entry-icon{width:36px;height:36px;display:grid;place-items:center;background:var(--accent-soft);border-radius:10px;color:#b36a24;font-weight:900;margin-bottom:15px}
    .entry h3{font-size:17px;margin-bottom:6px}
    .entry p{font-size:13px;color:var(--muted)}
    .dark-section{background:var(--dark);color:#fff}
    .dark-section .section-desc{color:#b9c9cc}
    .dark-section .section-kicker{color:#9adbd0}
    .content-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
    .media-card{background:#fff;color:var(--ink);border-radius:14px;overflow:hidden;border:1px solid var(--line);transition:.2s}
    .media-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
    .media-img{height:170px;position:relative}
    .media-img img{height:100%}
    .badge{position:absolute;left:12px;top:12px;background:var(--brand);color:#fff;border-radius:6px;padding:3px 7px;font-size:11px;font-weight:800}
    .badge.gold{background:var(--accent)}
    .media-body{padding:15px}
    .media-body h3{font-size:16px;margin-bottom:5px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
    .media-meta{display:flex;justify-content:space-between;align-items:center;color:var(--muted);font-size:12px}
    .rating{color:#bb7028;font-weight:800}
    .category-section{background:var(--soft)}
    .category-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .category{padding:24px;background:#fff;border-left:4px solid var(--brand);border-radius:12px;box-shadow:0 5px 20px rgba(17,52,59,.04)}
    .category:nth-child(2n){border-color:var(--accent)}
    .category h3{font-size:18px;margin-bottom:8px}
    .category p{font-size:13px;color:var(--muted)}
    .feature-layout{display:grid;grid-template-columns:1fr 1fr;gap:24px}
    .feature-panel{min-height:265px;border-radius:16px;padding:28px;background:#f5faf9;position:relative;overflow:hidden}
    .feature-panel.dark{background:#172f35;color:#fff}
    .feature-panel h3{font-size:24px;margin:10px 0}
    .feature-panel p{font-size:14px;color:var(--muted);max-width:450px}
    .feature-panel.dark p{color:#bfd0d1}
    .feature-number{font-size:48px;font-weight:900;color:var(--accent);line-height:1}
    .news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
    .news-item{display:grid;grid-template-columns:116px 1fr;gap:16px;padding-bottom:18px;border-bottom:1px solid var(--line)}
    .news-item img{height:82px;border-radius:10px}
    .news-item h3{font-size:15px;line-height:1.45;margin-bottom:7px}
    .news-item time{color:var(--muted);font-size:12px}
    .ranking-layout{display:grid;grid-template-columns:1fr 1fr;gap:34px;align-items:start}
    .rank-list{list-style:none;border-top:1px solid var(--line)}
    .rank-item{display:grid;grid-template-columns:38px 1fr auto auto;align-items:center;gap:14px;padding:14px 5px;border-bottom:1px solid var(--line)}
    .rank-no{font-size:20px;font-weight:900;color:#b5c1c4}
    .rank-item:nth-child(1) .rank-no,.rank-item:nth-child(2) .rank-no,.rank-item:nth-child(3) .rank-no{color:var(--accent)}
    .rank-name{font-size:14px;font-weight:700}
    .rank-tag{font-size:11px;background:#edf7f5;color:var(--brand);border-radius:5px;padding:3px 7px}
    .heat{font-size:12px;color:var(--muted)}
    .steps{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border:1px solid var(--line);border-radius:15px;overflow:hidden}
    .step{padding:24px 20px;background:#fff;border-right:1px solid var(--line)}
    .step:last-child{border-right:0}
    .step-num{color:var(--brand);font-size:13px;font-weight:900;margin-bottom:18px}
    .step h3{font-size:16px;margin-bottom:8px}
    .step p{font-size:13px;color:var(--muted)}
    .multidevice{background:#fff5e8}
    .device-row{display:grid;grid-template-columns:1.15fr .85fr;gap:40px;align-items:center}
    .device-row h2{max-width:520px}
    .device-row p{color:var(--muted);margin:15px 0 24px;max-width:560px}
    .device-points{display:flex;gap:10px;flex-wrap:wrap}
    .device-points span{background:#fff;border:1px solid #eedbc4;border-radius:8px;padding:9px 13px;font-size:13px}
    .device-art{display:grid;grid-template-columns:1fr 1fr;gap:12px}
    .device-art div{padding:24px;background:#fff;border-radius:14px;text-align:center;color:var(--brand);font-size:29px;font-weight:900}
    .device-art div small{display:block;color:var(--muted);font-size:12px;font-weight:400;margin-top:3px}
    .faq-section{background:var(--soft)}
    .faq-list{max-width:900px;margin:auto}
    details{background:#fff;border-bottom:1px solid var(--line);padding:20px 24px}
    details:first-child{border-radius:12px 12px 0 0}
    details:last-child{border-radius:0 0 12px 12px}
    summary{cursor:pointer;font-weight:800;list-style:none;position:relative;padding-right:25px}
    summary::-webkit-details-marker{display:none}
    summary:after{content:"+";position:absolute;right:0;color:var(--brand);font-size:22px;top:-4px}
    details[open] summary:after{content:"−"}
    details p{color:var(--muted);font-size:14px;margin-top:12px;max-width:800px}
    .closing{padding:64px 0;background:var(--brand);color:#fff}
    .closing-inner{display:flex;align-items:center;justify-content:space-between;gap:30px}
    .closing h2{max-width:670px}
    .closing p{color:#c9ece5;margin-top:8px}
    .closing .btn-light{border:0;color:var(--brand);font-weight:800}
    footer{background:#102126;color:#c1d0d2;padding:55px 0 22px}
    .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:30px;padding-bottom:40px}
    footer .brand{color:#fff;margin-bottom:15px}
    .footer-about{font-size:13px;color:#9eb0b3;max-width:300px}
    footer h3{color:#fff;font-size:14px;margin-bottom:14px}
    footer ul{list-style:none;display:grid;gap:8px;font-size:13px}
    footer li a:hover{color:#fff}
    .copyright{border-top:1px solid rgba(255,255,255,.12);padding-top:19px;font-size:12px;color:#819397;display:flex;justify-content:space-between;gap:15px}
    a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid rgba(232,155,77,.55);outline-offset:3px}
    @media (max-width:1024px){
      .hero-grid{gap:35px}.content-grid{grid-template-columns:repeat(3,1fr)}
      .entry-grid{grid-template-columns:repeat(2,1fr)}.news-grid{grid-template-columns:repeat(2,1fr)}
      .footer-grid{grid-template-columns:2fr 1fr 1fr}
    }
    @media (max-width:768px){
      .site-header{height:68px}.menu-toggle{display:block}.nav{display:none;position:absolute;left:20px;right:20px;top:61px;background:#fff;padding:15px 20px;box-shadow:var(--shadow);border:1px solid var(--line);border-radius:12px;align-items:stretch;flex-direction:column;gap:5px}.nav.open{display:flex}.nav a{padding:10px 0}.nav-cta{text-align:center}
      .hero{padding:52px 0}.hero-grid,.feature-layout,.ranking-layout,.device-row{grid-template-columns:1fr}.signal-board{max-width:620px}
      section{padding:58px 0}.content-grid{grid-template-columns:repeat(2,1fr)}.category-grid{grid-template-columns:repeat(2,1fr)}
      .steps{grid-template-columns:repeat(2,1fr)}.step:nth-child(2){border-right:0}.step:nth-child(-n+2){border-bottom:1px solid var(--line)}
      .closing-inner{align-items:flex-start;flex-direction:column}
    }
    @media (max-width:520px){
      .container{width:min(100% - 28px,var(--container))}.brand{font-size:14px}.brand-mark{width:34px;height:34px}
      h1{font-size:36px}.hero-lead{font-size:16px}.section-head{display:block}.section-link{display:inline-block;margin-top:14px}
      .icon-matrix{grid-template-columns:repeat(2,1fr)}.content-grid,.entry-grid,.category-grid,.news-grid{grid-template-columns:1fr}
      .media-img{height:205px}.rank-item{grid-template-columns:30px 1fr auto}.rank-tag{display:none}
      .steps{grid-template-columns:1fr}.step{border-right:0!important;border-bottom:1px solid var(--line)}.step:last-child{border-bottom:0}
      .footer-grid{grid-template-columns:1fr 1fr}.footer-about{grid-column:1/-1}.copyright{display:block}.copyright span{display:block;margin-top:6px}
      .device-art{grid-template-columns:1fr 1fr}
    }