/* roulang page: index */
:root{
      --bg:#f7f8fc;
      --surface:#ffffff;
      --surface-2:#f0f4ff;
      --ink:#101828;
      --text:#344054;
      --muted:#667085;
      --line:rgba(16,24,40,.10);
      --brand:#6d5ef7;
      --brand-dark:#5143d9;
      --cyan:#00b8a9;
      --amber:#ffb020;
      --rose:#ff5c8a;
      --radius-sm:14px;
      --radius:22px;
      --radius-lg:34px;
      --shadow:0 18px 60px rgba(16,24,40,.10);
      --shadow-lg:0 30px 90px rgba(16,24,40,.16);
      --focus:0 0 0 4px rgba(109,94,247,.18);
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:Inter,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
      color:var(--ink);
      background:
        radial-gradient(circle at top left, rgba(109,94,247,.18), transparent 34rem),
        radial-gradient(circle at 86% 12%, rgba(0,184,169,.14), transparent 28rem),
        linear-gradient(180deg,#f7f8fc 0%,#ffffff 46%,#f7f8fc 100%);
      line-height:1.75;
      -webkit-font-smoothing:antialiased;
      text-rendering:optimizeLegibility;
    }
    a{color:inherit;text-decoration:none}
    img{max-width:100%;display:block}
    button,input,textarea{font:inherit}
    button{cursor:pointer}
    ::selection{background:rgba(109,94,247,.18)}
    .site-container{width:min(1180px,calc(100% - 40px));margin-inline:auto}
    .glass-header{
      position:fixed;top:18px;left:0;right:0;z-index:50;
      transition:all .28s ease;
      pointer-events:none;
    }
    .glass-header .nav-shell{
      pointer-events:auto;
      width:min(1180px,calc(100% - 40px));margin-inline:auto;
      display:flex;align-items:center;justify-content:space-between;gap:18px;
      padding:12px 14px 12px 18px;
      border:1px solid rgba(255,255,255,.46);
      background:rgba(255,255,255,.66);
      backdrop-filter:blur(18px);
      -webkit-backdrop-filter:blur(18px);
      border-radius:999px;
      box-shadow:0 16px 50px rgba(16,24,40,.12);
    }
    .glass-header.is-solid{top:0}
    .glass-header.is-solid .nav-shell{
      width:100%;border-radius:0;
      border-left:0;border-right:0;border-top:0;
      background:rgba(255,255,255,.92);
      box-shadow:0 10px 38px rgba(16,24,40,.10);
      padding-inline:max(20px,calc((100% - 1180px)/2));
    }
    .brand-logo{display:flex;align-items:center;gap:10px;min-width:0}
    .brand-mark{
      width:38px;height:38px;border-radius:14px;
      display:grid;place-items:center;color:#fff;font-weight:900;
      background:linear-gradient(135deg,var(--brand),var(--cyan));
      box-shadow:0 12px 32px rgba(109,94,247,.25);
      flex:0 0 auto;
    }
    .brand-name{font-weight:900;letter-spacing:-.02em;color:#151a2d;white-space:nowrap}
    .nav-menu{display:flex;align-items:center;gap:8px}
    .nav-link{
      padding:10px 16px;border-radius:999px;color:#344054;font-weight:700;
      transition:background .22s ease,color .22s ease,transform .22s ease;
    }
    .nav-link:hover,.nav-link.active{background:rgba(109,94,247,.10);color:var(--brand-dark)}
    .nav-link:active{transform:scale(.98)}
    .nav-actions{display:flex;align-items:center;gap:10px}
    .search-box{
      display:flex;align-items:center;gap:8px;
      min-width:230px;padding:9px 12px;border-radius:999px;
      border:1px solid rgba(16,24,40,.10);background:rgba(255,255,255,.72);
      color:var(--muted);
    }
    .search-box input{border:0;outline:0;background:transparent;width:100%;color:var(--ink)}
    .search-box input::placeholder{color:#98a2b3}
    .menu-toggle{
      display:none;width:42px;height:42px;border-radius:999px;border:1px solid rgba(16,24,40,.10);
      background:#fff;color:var(--ink);align-items:center;justify-content:center;
    }
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:9px;
      border-radius:999px;padding:12px 18px;font-weight:800;
      border:1px solid transparent;transition:transform .22s ease,box-shadow .22s ease,background .22s ease,color .22s ease,border-color .22s ease;
      white-space:nowrap;
    }
    .btn:hover{transform:translateY(-2px)}
    .btn:active{transform:translateY(0) scale(.99)}
    .btn:focus-visible,.nav-link:focus-visible,input:focus-visible,summary:focus-visible,textarea:focus-visible{outline:0;box-shadow:var(--focus)}
    .btn-primary{background:linear-gradient(135deg,var(--brand),var(--brand-dark));color:#fff;box-shadow:0 16px 38px rgba(109,94,247,.30)}
    .btn-primary:hover{box-shadow:0 20px 50px rgba(109,94,247,.38)}
    .btn-secondary{background:#fff;color:var(--ink);border-color:rgba(16,24,40,.12);box-shadow:0 12px 30px rgba(16,24,40,.08)}
    .btn-secondary:hover{border-color:rgba(109,94,247,.28);color:var(--brand-dark)}
    .btn-ghost{background:rgba(255,255,255,.12);color:#fff;border-color:rgba(255,255,255,.22)}
    .btn-ghost:hover{background:rgba(255,255,255,.20)}
    .badge{
      display:inline-flex;align-items:center;gap:7px;
      padding:7px 11px;border-radius:999px;font-size:13px;font-weight:800;
      background:rgba(109,94,247,.10);color:var(--brand-dark);
      border:1px solid rgba(109,94,247,.16);
    }
    .dot{width:8px;height:8px;border-radius:50%;background:var(--cyan);box-shadow:0 0 0 5px rgba(0,184,169,.12)}
    .section{padding:86px 0}
    .section.band{background:linear-gradient(180deg,rgba(240,244,255,.86),rgba(255,255,255,.92))}
    .section.dark{
      color:#fff;background:
        radial-gradient(circle at 16% 0%,rgba(109,94,247,.42),transparent 32rem),
        linear-gradient(135deg,#101828,#1d2440 58%,#111827);
      position:relative;overflow:hidden;
    }
    .section.dark:before{
      content:"";position:absolute;inset:-90px auto auto -70px;width:280px;height:280px;
      background:rgba(0,184,169,.22);filter:blur(20px);border-radius:50%;
    }
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:28px;margin-bottom:32px}
    .eyebrow{margin:0 0 10px;color:var(--brand-dark);font-weight:900;letter-spacing:.08em;font-size:13px}
    .section-title{margin:0;font-size:clamp(28px,3vw,44px);line-height:1.18;letter-spacing:-.04em;font-weight:950}
    .section-desc{margin:12px 0 0;color:var(--muted);max-width:680px;font-size:16px}
    .dark .section-desc,.dark .eyebrow{color:rgba(255,255,255,.74)}
    .hero{
      position:relative;overflow:hidden;
      padding:132px 0 78px;
      min-height:760px;
      background:
        linear-gradient(105deg,rgba(16,24,40,.92) 0%,rgba(32,39,75,.92) 47%,rgba(109,94,247,.78) 100%),
        radial-gradient(circle at 80% 20%,rgba(0,184,169,.65),transparent 28rem);
      color:#fff;
      clip-path:polygon(0 0,100% 0,100% 91%,0 100%);
    }
    .hero:after{
      content:"";position:absolute;right:-120px;top:90px;width:420px;height:420px;border-radius:48px;
      background:linear-gradient(135deg,rgba(255,255,255,.18),rgba(255,255,255,.03));
      transform:rotate(18deg);border:1px solid rgba(255,255,255,.15);
    }
    .hero-grid{
      position:relative;z-index:1;
      display:grid;grid-template-columns:1.45fr .78fr;grid-template-rows:auto auto;gap:20px;
    }
    .hero-main,.hero-mini,.hero-cta-bar{
      border:1px solid rgba(255,255,255,.16);
      background:rgba(255,255,255,.10);
      backdrop-filter:blur(18px);
      -webkit-backdrop-filter:blur(18px);
      box-shadow:0 28px 90px rgba(0,0,0,.22);
    }
    .hero-main{grid-row:span 2;border-radius:34px;padding:42px}
    .hero-mini{border-radius:28px;padding:26px}
    .hero-cta-bar{
      grid-column:1 / -1;border-radius:28px;padding:18px 20px;
      display:flex;align-items:center;justify-content:space-between;gap:18px;
      background:rgba(255,255,255,.14);
    }
    .hero h1{
      margin:18px 0 18px;font-size:clamp(38px,5.6vw,72px);line-height:1.05;
      letter-spacing:-.06em;font-weight:950;max-width:900px;
    }
    .hero-intro{font-size:18px;line-height:1.9;color:rgba(255,255,255,.82);max-width:790px;margin:0 0 26px}
    .hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:24px}
    .hero-data{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:30px}
    .data-pill{
      padding:16px;border-radius:22px;background:rgba(255,255,255,.11);
      border:1px solid rgba(255,255,255,.13);
    }
    .data-pill strong{display:block;font-size:26px;line-height:1;font-weight:950}
    .data-pill span{display:block;margin-top:8px;color:rgba(255,255,255,.70);font-size:13px}
    .mini-title{font-size:20px;font-weight:950;margin:10px 0 8px;letter-spacing:-.03em}
    .mini-text{margin:0;color:rgba(255,255,255,.74);font-size:14px;line-height:1.8}
    .mini-icon{width:42px;height:42px;border-radius:16px;background:rgba(255,255,255,.15);display:grid;place-items:center}
    .card{
      background:rgba(255,255,255,.92);
      border:1px solid rgba(16,24,40,.08);
      border-radius:var(--radius);
      box-shadow:0 14px 42px rgba(16,24,40,.07);
      transition:transform .24s ease,box-shadow .24s ease,border-color .24s ease;
    }
    .card:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:rgba(109,94,247,.18)}
    .directory-grid{display:grid;grid-template-columns:1.1fr .9fr .9fr;gap:18px}
    .dir-card{padding:24px;min-height:232px;display:flex;flex-direction:column;justify-content:space-between;position:relative;overflow:hidden}
    .dir-card.featured{
      background:
        radial-gradient(circle at right top,rgba(0,184,169,.22),transparent 16rem),
        linear-gradient(135deg,#ffffff,#f5f2ff);
    }
    .dir-card:after{
      content:"";position:absolute;right:-38px;bottom:-44px;width:128px;height:128px;border-radius:36px;
      background:rgba(109,94,247,.08);transform:rotate(18deg);
    }
    .dir-title{font-size:22px;font-weight:950;margin:14px 0 8px;letter-spacing:-.03em}
    .dir-text{color:var(--muted);margin:0;position:relative;z-index:1}
    .dir-meta{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:22px;position:relative;z-index:1}
    .meta-count{font-weight:900;color:var(--brand-dark)}
    .link-arrow{font-weight:900;color:var(--brand-dark)}
    .recommend-layout{display:grid;grid-template-columns:1.06fr .94fr;gap:20px;align-items:stretch}
    .hot-panel{
      border-radius:34px;padding:30px;color:#fff;min-height:410px;position:relative;overflow:hidden;
      background:
        radial-gradient(circle at 86% 16%,rgba(255,176,32,.32),transparent 16rem),
        linear-gradient(135deg,#151a2d,#4236bd);
      box-shadow:var(--shadow-lg);
    }
    .hot-panel:before{
      content:"";position:absolute;inset:auto -80px -95px auto;width:260px;height:260px;border-radius:50%;
      background:rgba(0,184,169,.28);filter:blur(8px);
    }
    .hot-panel h3{font-size:34px;line-height:1.15;margin:18px 0 12px;font-weight:950;letter-spacing:-.04em}
    .hot-panel p{color:rgba(255,255,255,.78);margin:0;max-width:520px}
    .hot-list{display:grid;gap:14px}
    .hot-item{padding:18px;display:grid;grid-template-columns:auto 1fr auto;gap:14px;align-items:center}
    .rank{
      width:38px;height:38px;border-radius:15px;display:grid;place-items:center;
      background:rgba(109,94,247,.10);color:var(--brand-dark);font-weight:950;
    }
    .hot-item h4{font-weight:950;margin:0 0 4px;font-size:16px}
    .hot-item p{margin:0;color:var(--muted);font-size:14px;line-height:1.6}
    .service-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .service-card{padding:22px}
    .service-icon{width:48px;height:48px;border-radius:18px;display:grid;place-items:center;background:linear-gradient(135deg,rgba(109,94,247,.12),rgba(0,184,169,.12));color:var(--brand-dark);font-weight:950}
    .service-card h3{margin:16px 0 8px;font-size:19px;font-weight:950}
    .service-card p{margin:0;color:var(--muted);font-size:14px}
    .compare-wrap{display:grid;grid-template-columns:.9fr 1.1fr;gap:22px;align-items:center}
    .metric-board{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
    .metric-card{padding:22px;border-radius:24px;background:rgba(255,255,255,.10);border:1px solid rgba(255,255,255,.14)}
    .metric-card strong{display:block;font-size:34px;line-height:1;font-weight:950}
    .metric-card span{display:block;margin-top:10px;color:rgba(255,255,255,.70);font-size:14px}
    .compare-table{background:#fff;color:var(--ink);border-radius:30px;padding:12px;box-shadow:0 24px 70px rgba(0,0,0,.20)}
    .compare-row{display:grid;grid-template-columns:1fr 1fr;gap:10px;padding:12px}
    .compare-row:not(:last-child){border-bottom:1px solid rgba(16,24,40,.08)}
    .compare-cell{border-radius:18px;padding:14px}
    .compare-cell.good{background:rgba(0,184,169,.10)}
    .compare-cell.normal{background:#f5f6fa}
    .compare-cell b{display:block;margin-bottom:5px}
    .news-layout{display:grid;grid-template-columns:1.35fr .65fr;gap:22px}
    .news-list{padding:10px}
    .news-link{
      display:grid;grid-template-columns:auto 1fr auto;gap:16px;align-items:center;
      padding:18px;border-radius:20px;transition:background .22s ease,transform .22s ease;
    }
    .news-link:hover{background:rgba(109,94,247,.08);transform:translateX(4px)}
    .news-date{font-weight:950;color:var(--brand-dark);background:rgba(109,94,247,.10);padding:8px 10px;border-radius:14px;text-align:center;min-width:74px}
    .news-link h3{margin:0 0 5px;font-size:17px;font-weight:950}
    .news-link p{margin:0;color:var(--muted);font-size:14px;line-height:1.6}
    .side-card{padding:24px;background:linear-gradient(180deg,#fff,#f5f2ff)}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}
    .tag{display:inline-flex;padding:8px 12px;border-radius:999px;background:#fff;border:1px solid rgba(16,24,40,.08);color:var(--muted);font-size:13px;font-weight:800}
    .tag:hover{color:var(--brand-dark);border-color:rgba(109,94,247,.22)}
    .benefit-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .benefit-card{padding:24px}
    .benefit-card h3{font-size:20px;font-weight:950;margin:0 0 8px}
    .benefit-card p{color:var(--muted);margin:0;font-size:14px}
    .benefit-card .check{color:var(--cyan);font-weight:950;margin-right:8px}
    .faq-list{display:grid;gap:14px}
    details.faq-item{
      background:#fff;border:1px solid rgba(16,24,40,.09);border-radius:22px;box-shadow:0 12px 34px rgba(16,24,40,.06);overflow:hidden;
    }
    details.faq-item[open]{border-color:rgba(109,94,247,.24)}
    .faq-item summary{
      list-style:none;display:flex;align-items:center;justify-content:space-between;gap:20px;
      padding:20px 22px;font-weight:950;cursor:pointer;
    }
    .faq-item summary::-webkit-details-marker{display:none}
    .faq-item summary:after{content:"+";width:30px;height:30px;border-radius:50%;display:grid;place-items:center;background:rgba(109,94,247,.10);color:var(--brand-dark);font-weight:950}
    .faq-item[open] summary:after{content:"−"}
    .faq-item p{margin:0;padding:0 22px 22px;color:var(--muted)}
    .share-panel{
      display:grid;grid-template-columns:1fr .95fr;gap:22px;align-items:stretch;
    }
    .share-card{padding:30px}
    .share-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:22px}
    .form-card{padding:26px;background:linear-gradient(135deg,#ffffff,#f5fbff)}
    .form-grid{display:grid;gap:12px}
    .field label{display:block;font-weight:900;margin-bottom:8px;color:#344054}
    .field input,.field textarea{
      width:100%;border:1px solid rgba(16,24,40,.12);border-radius:18px;background:#fff;
      padding:13px 15px;color:var(--ink);outline:0;transition:border-color .2s ease,box-shadow .2s ease;
    }
    .field input:focus,.field textarea:focus{border-color:rgba(109,94,247,.45);box-shadow:var(--focus)}
    .field textarea{min-height:96px;resize:vertical}
    .form-note{font-size:13px;color:var(--muted);margin:10px 0 0}
    .form-success{display:none;margin-top:12px;color:#067647;font-weight:900}
    .footer{
      background:#0b1020;color:rgba(255,255,255,.72);padding:54px 0 28px;
    }
    .footer-grid{display:grid;grid-template-columns:1.2fr .8fr .8fr;gap:28px}
    .footer h2,.footer h3{color:#fff;margin:0 0 14px;font-weight:950}
    .footer p{margin:0;color:rgba(255,255,255,.66)}
    .footer-links{display:grid;gap:10px}
    .footer-links a{color:rgba(255,255,255,.70);transition:color .2s ease,transform .2s ease}
    .footer-links a:hover{color:#fff;transform:translateX(3px)}
    .copyright{border-top:1px solid rgba(255,255,255,.10);margin-top:34px;padding-top:22px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px;color:rgba(255,255,255,.54)}
    .mobile-panel{
      display:none;position:fixed;inset:76px 20px auto 20px;z-index:49;
      border-radius:24px;padding:14px;background:rgba(255,255,255,.94);backdrop-filter:blur(16px);
      box-shadow:var(--shadow);border:1px solid rgba(16,24,40,.08);
    }
    .mobile-panel.open{display:block}
    .mobile-panel a{display:block;padding:14px;border-radius:16px;font-weight:900}
    .mobile-panel a:hover{background:rgba(109,94,247,.10);color:var(--brand-dark)}
    @media (max-width:1024px){
      .hero-grid,.recommend-layout,.compare-wrap,.news-layout,.share-panel{grid-template-columns:1fr}
      .hero-main{grid-row:auto}
      .directory-grid{grid-template-columns:1fr 1fr}
      .service-grid{grid-template-columns:repeat(2,1fr)}
      .benefit-grid{grid-template-columns:1fr 1fr}
      .search-box{display:none}
      .hero{min-height:auto}
    }
    @media (max-width:768px){
      .site-container{width:min(100% - 28px,1180px)}
      .glass-header{top:10px}
      .glass-header .nav-shell{width:calc(100% - 24px);padding:10px 12px}
      .brand-name{font-size:15px;max-width:170px;overflow:hidden;text-overflow:ellipsis}
      .nav-menu,.nav-actions .btn-primary{display:none}
      .menu-toggle{display:flex}
      .hero{padding:108px 0 62px;clip-path:polygon(0 0,100% 0,100% 96%,0 100%)}
      .hero-main,.hero-mini{padding:24px;border-radius:26px}
      .hero h1{font-size:38px}
      .hero-intro{font-size:16px}
      .hero-data{grid-template-columns:1fr}
      .hero-cta-bar{flex-direction:column;align-items:flex-start}
      .section{padding:62px 0}
      .section-head{display:block}
      .directory-grid,.service-grid,.benefit-grid,.footer-grid{grid-template-columns:1fr}
      .compare-row{grid-template-columns:1fr}
      .metric-board{grid-template-columns:1fr 1fr}
    }
    @media (max-width:520px){
      body{line-height:1.7}
      .btn{width:100%;padding:12px 16px}
      .hero-actions,.share-actions{width:100%}
      .metric-board{grid-template-columns:1fr}
      .news-link{grid-template-columns:1fr}
      .news-date{width:max-content}
      .hot-item{grid-template-columns:auto 1fr}
      .hot-item .link-arrow{grid-column:2}
      .section-title{font-size:28px}
      .footer{padding-bottom:84px}
    }