/* roulang page: index */
:root{
      --bg:#0b1020;
      --bg-soft:#111832;
      --surface:#ffffff;
      --surface-2:#f7f8fc;
      --ink:#172033;
      --muted:#667085;
      --muted-2:#98a2b3;
      --line:#e5e7f0;
      --primary:#7c3aed;
      --primary-2:#06b6d4;
      --accent:#ff7a45;
      --green:#16a34a;
      --warning:#f59e0b;
      --radius-sm:12px;
      --radius:20px;
      --radius-lg:30px;
      --shadow-sm:0 10px 28px rgba(17,24,39,.08);
      --shadow:0 24px 70px rgba(17,24,39,.14);
      --shadow-glow:0 24px 80px rgba(124,58,237,.28);
      --container:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei",sans-serif;
      color:var(--ink);
      background:
        radial-gradient(circle at 12% 8%, rgba(124,58,237,.16), transparent 34%),
        radial-gradient(circle at 86% 0%, rgba(6,182,212,.14), transparent 30%),
        linear-gradient(180deg,#fbfcff 0%,#f4f6fb 48%,#ffffff 100%);
      line-height:1.68;
      overflow-x:hidden;
    }
    a{color:inherit;text-decoration:none}
    img,svg{display:block;max-width:100%}
    button,input,textarea,select{font:inherit}
    ::selection{background:rgba(124,58,237,.18);color:#28124d}
    .container{width:min(var(--container),calc(100% - 40px));margin:0 auto}
    .site-header{
      position:sticky;top:0;z-index:50;
      background:rgba(255,255,255,.82);
      backdrop-filter:blur(18px);
      border-bottom:1px solid rgba(229,231,240,.82);
      transition:box-shadow .25s ease, background .25s ease;
    }
    .site-header.is-scrolled{box-shadow:0 16px 36px rgba(17,24,39,.08);background:rgba(255,255,255,.94)}
    .nav-wrap{height:76px;display:flex;align-items:center;justify-content:space-between;gap:18px}
    .brand{display:flex;align-items:center;gap:12px;font-weight:900;letter-spacing:-.02em;color:#111827}
    .brand-mark{
      width:42px;height:42px;border-radius:16px;
      background:conic-gradient(from 150deg,var(--primary),var(--primary-2),var(--accent),var(--primary));
      box-shadow:0 12px 26px rgba(124,58,237,.22);
      position:relative;
    }
    .brand-mark:after{
      content:"";position:absolute;inset:10px;border-radius:10px;
      background:rgba(255,255,255,.9);
      clip-path:polygon(50% 0,94% 26%,94% 74%,50% 100%,6% 74%,6% 26%);
    }
    .brand-text{font-size:18px;white-space:nowrap}
    .nav-main{display:flex;align-items:center;gap:10px}
    .nav-link{
      padding:10px 16px;border-radius:999px;
      font-weight:800;color:#344054;
      transition:background .2s ease,color .2s ease,transform .2s ease;
    }
    .nav-link:hover,.nav-link.active{background:#f0eaff;color:#5b21b6}
    .nav-link:active{transform:translateY(1px)}
    .phase-strip{display:flex;align-items:center;gap:8px;padding:5px;border:1px solid var(--line);border-radius:999px;background:#fff;box-shadow:var(--shadow-sm)}
    .phase-chip{
      display:inline-flex;align-items:center;gap:6px;
      padding:7px 11px;border-radius:999px;
      font-size:12px;font-weight:800;color:#475467;background:#f8fafc;
      white-space:nowrap;
    }
    .phase-chip.current{background:#151a2d;color:#fff}
    .phase-dot{width:7px;height:7px;border-radius:999px;background:var(--muted-2)}
    .phase-chip.current .phase-dot{background:#22c55e;box-shadow:0 0 0 5px rgba(34,197,94,.14)}
    .header-cta{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      padding:11px 16px;border-radius:999px;
      background:#111827;color:#fff;font-weight:900;
      box-shadow:0 12px 28px rgba(17,24,39,.18);
      transition:transform .2s ease,box-shadow .2s ease,background .2s ease;
    }
    .header-cta:hover{transform:translateY(-2px);box-shadow:0 18px 34px rgba(17,24,39,.22);background:#222b42}
    .menu-toggle{display:none;border:0;background:#111827;color:#fff;border-radius:14px;padding:10px 12px;font-weight:900}
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:10px;
      border-radius:999px;padding:13px 20px;font-weight:900;
      transition:transform .2s ease,box-shadow .2s ease,background .2s ease,border-color .2s ease,color .2s ease;
      border:1px solid transparent;cursor:pointer;
    }
    .btn:focus-visible,.nav-link:focus-visible,.header-cta:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible,button:focus-visible{
      outline:3px solid rgba(124,58,237,.28);outline-offset:3px;
    }
    .btn-primary{background:linear-gradient(135deg,var(--primary),#9f67ff);color:#fff;box-shadow:var(--shadow-glow)}
    .btn-primary:hover{transform:translateY(-2px);box-shadow:0 30px 80px rgba(124,58,237,.34)}
    .btn-secondary{background:#fff;color:#24143f;border-color:#d9d6ff;box-shadow:var(--shadow-sm)}
    .btn-secondary:hover{transform:translateY(-2px);border-color:#bdb5ff;background:#fbfaff}
    .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,.2);transform:translateY(-2px)}
    .badge{
      display:inline-flex;align-items:center;gap:8px;padding:7px 11px;
      border-radius:999px;background:#efe9ff;color:#5b21b6;
      font-size:13px;font-weight:900;
    }
    .badge.dark{background:rgba(255,255,255,.12);color:#fff;border:1px solid rgba(255,255,255,.16)}
    .section{padding:86px 0}
    .section-tight{padding:62px 0}
    .section-head{max-width:760px;margin-bottom:34px}
    .eyebrow{color:#6d28d9;font-weight:950;letter-spacing:.08em;font-size:13px}
    .section-title{font-size:clamp(30px,4vw,48px);line-height:1.12;letter-spacing:-.045em;font-weight:950;margin:10px 0 14px;color:#111827}
    .section-desc{font-size:17px;color:var(--muted);max-width:720px}
    .card{
      background:rgba(255,255,255,.88);
      border:1px solid rgba(229,231,240,.9);
      border-radius:var(--radius);
      box-shadow:var(--shadow-sm);
      transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
    }
    .card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:rgba(124,58,237,.22)}
    .hero{padding:48px 0 88px}
    .hero-stage{
      position:relative;overflow:hidden;border-radius:34px;
      background:
        linear-gradient(135deg,rgba(15,23,42,.96),rgba(45,23,92,.96) 48%,rgba(8,47,73,.94)),
        radial-gradient(circle at 74% 24%,rgba(255,122,69,.28),transparent 32%);
      color:#fff;box-shadow:0 36px 100px rgba(15,23,42,.32);
      border:1px solid rgba(255,255,255,.12);
    }
    .hero-stage:before{
      content:"";position:absolute;inset:-1px;
      background:
        linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px),
        linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px);
      background-size:44px 44px;
      mask-image:linear-gradient(90deg,transparent,black 18%,black 78%,transparent);
      opacity:.55;
    }
    .hero-inner{position:relative;display:grid;grid-template-columns:1.15fr .85fr;gap:28px;padding:42px}
    .hero-copy{padding:16px 0}
    .hero h1{
      font-size:clamp(38px,6vw,76px);
      line-height:1.03;letter-spacing:-.065em;font-weight:950;margin:18px 0 18px;
      max-width:820px;
    }
    .hero-lead{font-size:18px;color:rgba(255,255,255,.78);max-width:760px;margin-bottom:24px}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin:26px 0 28px}
    .hero-points{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:28px;max-width:760px}
    .point{
      border:1px solid rgba(255,255,255,.14);background:rgba(255,255,255,.08);
      border-radius:18px;padding:14px 15px;backdrop-filter:blur(10px)
    }
    .point strong{display:block;font-size:24px;line-height:1;color:#fff}
    .point span{display:block;color:rgba(255,255,255,.68);font-size:13px;margin-top:7px}
    .release-card{
      align-self:stretch;
      display:flex;flex-direction:column;gap:16px;
      padding:18px;border-radius:28px;
      background:rgba(255,255,255,.1);
      border:1px solid rgba(255,255,255,.16);
      backdrop-filter:blur(18px);
    }
    .main-pack{
      flex:1;border-radius:24px;padding:22px;
      background:linear-gradient(180deg,rgba(255,255,255,.98),rgba(244,239,255,.94));
      color:#171127;position:relative;overflow:hidden;
    }
    .main-pack:after{
      content:"";position:absolute;width:210px;height:210px;border-radius:999px;
      background:radial-gradient(circle,rgba(124,58,237,.24),transparent 64%);
      right:-72px;top:-72px;
    }
    .pack-top{position:relative;display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:18px}
    .pack-label{font-size:12px;font-weight:950;color:#6d28d9;background:#efe9ff;border-radius:999px;padding:7px 10px}
    .pack-title{position:relative;font-size:24px;line-height:1.18;font-weight:950;letter-spacing:-.03em;margin-bottom:12px}
    .pack-desc{position:relative;color:#5b6374;font-size:14px}
    .parameter-grid{position:relative;display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:18px}
    .parameter{border:1px solid #e8e2ff;border-radius:16px;padding:12px;background:#fff}
    .parameter b{display:block;font-size:18px;color:#111827}
    .parameter span{font-size:12px;color:#667085}
    .countdown{
      display:grid;grid-template-columns:repeat(4,1fr);gap:10px;
      padding:14px;border-radius:22px;background:rgba(0,0,0,.18);border:1px solid rgba(255,255,255,.14)
    }
    .time-cell{text-align:center}
    .time-cell b{display:block;font-size:22px;line-height:1}
    .time-cell span{font-size:12px;color:rgba(255,255,255,.66)}
    .app-panel{
      display:grid;grid-template-columns:.82fr 1.18fr;gap:24px;align-items:stretch;
    }
    .app-visual{
      border-radius:30px;min-height:420px;position:relative;overflow:hidden;
      background:
        radial-gradient(circle at 30% 20%,rgba(255,122,69,.25),transparent 35%),
        linear-gradient(145deg,#151a2d,#28124d);
      box-shadow:var(--shadow);padding:26px;color:#fff;
    }
    .app-visual .floating-card{
      position:absolute;border-radius:20px;background:rgba(255,255,255,.13);
      border:1px solid rgba(255,255,255,.18);backdrop-filter:blur(12px);
      padding:15px;box-shadow:0 18px 42px rgba(0,0,0,.16);
    }
    .float-a{left:26px;right:58px;top:30px}
    .float-b{right:24px;bottom:34px;width:58%}
    .float-c{left:34px;bottom:112px;width:45%}
    .sync-ring{
      position:absolute;left:50%;top:52%;transform:translate(-50%,-50%);
      width:172px;height:172px;border-radius:999px;
      border:1px solid rgba(255,255,255,.18);
      display:grid;place-items:center;
      background:radial-gradient(circle,rgba(124,58,237,.28),rgba(255,255,255,.05));
    }
    .sync-ring:before,.sync-ring:after{content:"";position:absolute;border-radius:999px;border:1px dashed rgba(255,255,255,.26)}
    .sync-ring:before{inset:-28px}
    .sync-ring:after{inset:28px}
    .sync-core{width:72px;height:72px;border-radius:26px;background:#fff;color:#6d28d9;display:grid;place-items:center;font-size:28px;font-weight:950}
    .metric-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
    .metric-card{padding:22px}
    .metric-card b{display:block;font-size:34px;line-height:1;color:#111827;letter-spacing:-.04em}
    .metric-card span{display:block;color:var(--muted);margin-top:8px}
    .service-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:22px}
    .service-list{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
    .service-card{padding:22px;min-height:178px}
    .icon-box{width:42px;height:42px;border-radius:15px;background:#f0eaff;color:#6d28d9;display:grid;place-items:center;font-weight:950;margin-bottom:18px}
    .service-card h3,.compare-card h3,.hot-card h3{font-size:19px;font-weight:950;margin-bottom:8px;color:#111827}
    .service-card p,.compare-card p,.hot-card p{color:var(--muted);font-size:14px}
    .service-side{padding:28px;background:#111827;color:#fff;border-color:rgba(255,255,255,.1)}
    .check-list{display:grid;gap:13px;margin-top:22px}
    .check-item{display:flex;gap:10px;align-items:flex-start;color:rgba(255,255,255,.78)}
    .check-item i{flex:0 0 auto;width:21px;height:21px;border-radius:999px;background:rgba(34,197,94,.18);color:#86efac;display:grid;place-items:center;font-style:normal;font-size:12px;margin-top:2px}
    .compare-wrap{display:grid;grid-template-columns:1fr 1fr;gap:18px}
    .compare-card{padding:24px}
    .compare-card.before{background:#fff7ed;border-color:#fed7aa}
    .compare-card.after{background:#f0fdf4;border-color:#bbf7d0}
    .compare-row{display:flex;justify-content:space-between;gap:14px;padding:13px 0;border-bottom:1px solid rgba(17,24,39,.08)}
    .compare-row:last-child{border-bottom:0}
    .compare-row span:first-child{color:#475467}
    .compare-row span:last-child{font-weight:900;color:#111827;text-align:right}
    .campaign{
      border-radius:34px;overflow:hidden;background:
        linear-gradient(135deg,#fff7ed,#f4ecff 48%,#ecfeff);
      border:1px solid #f2e8ff;box-shadow:var(--shadow-sm);
    }
    .campaign-inner{display:grid;grid-template-columns:.95fr 1.05fr;gap:20px;padding:34px}
    .gift-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
    .gift{background:rgba(255,255,255,.78);border:1px solid rgba(255,255,255,.9);border-radius:20px;padding:18px}
    .gift b{display:block;font-size:18px;margin-bottom:6px}
    .gift span{color:var(--muted);font-size:14px}
    .hot-scroll{display:flex;gap:16px;overflow-x:auto;padding:6px 2px 18px;scroll-snap-type:x mandatory}
    .hot-scroll::-webkit-scrollbar{height:8px}
    .hot-scroll::-webkit-scrollbar-thumb{background:#d8d2ef;border-radius:999px}
    .hot-card{min-width:270px;scroll-snap-align:start;padding:22px;position:relative}
    .hot-no{width:34px;height:34px;border-radius:12px;background:#111827;color:#fff;display:grid;place-items:center;font-weight:950;margin-bottom:18px}
    .about-board{display:grid;grid-template-columns:.9fr 1.1fr;gap:24px;align-items:start}
    .story-card{padding:30px;background:#111827;color:#fff}
    .story-card .section-title{color:#fff}
    .story-card p{color:rgba(255,255,255,.75)}
    .rank-list{padding:10px}
    .rank-row{
      display:grid;grid-template-columns:42px 1fr auto auto;gap:14px;align-items:center;
      padding:15px;border-radius:16px;transition:background .2s ease,transform .2s ease;
    }
    .rank-row:hover{background:#f8f7ff;transform:translateX(3px)}
    .rank-index{width:30px;height:30px;border-radius:11px;background:#efe9ff;color:#6d28d9;display:grid;place-items:center;font-weight:950}
    .rank-title{font-weight:900;color:#111827}
    .rank-meta{font-size:13px;color:var(--muted)}
    .trend{font-weight:950;color:#16a34a}
    .update-timeline{position:relative;display:grid;gap:16px}
    .update-item{display:grid;grid-template-columns:140px 1fr;gap:18px;padding:20px;border-radius:22px;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow-sm)}
    .update-time{font-weight:950;color:#6d28d9}
    .update-item h3{font-weight:950;font-size:19px;margin-bottom:5px}
    .update-item p{color:var(--muted);font-size:14px}
    .news-layout{display:grid;grid-template-columns:1.25fr .75fr;gap:22px}
    .news-list{padding:10px}
    .news-link{
      display:grid;grid-template-columns:1fr auto;gap:18px;
      padding:18px;border-radius:18px;border-bottom:1px solid var(--line);
      transition:background .2s ease,transform .2s ease;
    }
    .news-link:last-child{border-bottom:0}
    .news-link:hover{background:#f7f5ff;transform:translateX(4px)}
    .news-link h3{font-size:18px;font-weight:950;margin-bottom:4px}
    .news-link p{font-size:14px;color:var(--muted)}
    .news-tag{align-self:start;border-radius:999px;background:#ecfeff;color:#0891b2;font-weight:900;font-size:12px;padding:7px 10px;white-space:nowrap}
    .recommend{padding:24px;background:linear-gradient(180deg,#111827,#201044);color:#fff}
    .recommend p{color:rgba(255,255,255,.72)}
    .faq-wrap{display:grid;grid-template-columns:.8fr 1.2fr;gap:24px}
    .faq-list{display:grid;gap:12px}
    .faq-item{border:1px solid var(--line);border-radius:20px;background:#fff;overflow:hidden;box-shadow:var(--shadow-sm)}
    .faq-question{
      width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
      padding:19px 21px;background:#fff;border:0;text-align:left;cursor:pointer;
      font-weight:950;color:#111827;
    }
    .faq-question span:last-child{width:28px;height:28px;border-radius:10px;background:#f3f0ff;color:#6d28d9;display:grid;place-items:center;transition:transform .2s ease}
    .faq-answer{display:none;padding:0 21px 20px;color:var(--muted);font-size:15px}
    .faq-item.open .faq-answer{display:block}
    .faq-item.open .faq-question span:last-child{transform:rotate(45deg)}
    .form-section{padding:76px 0 92px}
    .lead-form-wrap{
      display:grid;grid-template-columns:.9fr 1.1fr;gap:24px;
      border-radius:34px;background:#111827;color:#fff;overflow:hidden;
      box-shadow:0 34px 90px rgba(17,24,39,.28);
    }
    .form-copy{padding:38px}
    .form-copy h2{font-size:clamp(30px,4vw,48px);line-height:1.12;font-weight:950;letter-spacing:-.04em;margin:12px 0}
    .form-copy p{color:rgba(255,255,255,.73)}
    .lead-form{padding:28px;background:rgba(255,255,255,.07);border-left:1px solid rgba(255,255,255,.1)}
    .form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
    .form-field{display:grid;gap:7px;margin-bottom:14px}
    .form-field.full{grid-column:1/-1}
    .form-field label{font-size:13px;font-weight:900;color:rgba(255,255,255,.78)}
    .form-field input,.form-field select,.form-field textarea{
      width:100%;border:1px solid rgba(255,255,255,.15);border-radius:16px;
      padding:13px 14px;background:rgba(255,255,255,.1);color:#fff;
      outline:none;transition:border-color .2s ease,background .2s ease;
    }
    .form-field input::placeholder,.form-field textarea::placeholder{color:rgba(255,255,255,.42)}
    .form-field select option{color:#111827}
    .form-field input:focus,.form-field select:focus,.form-field textarea:focus{border-color:rgba(167,139,250,.85);background:rgba(255,255,255,.14)}
    .form-note{font-size:13px;color:rgba(255,255,255,.58);margin-top:12px}
    .form-message{display:none;margin-top:12px;padding:12px 14px;border-radius:14px;background:rgba(34,197,94,.14);color:#bbf7d0;border:1px solid rgba(34,197,94,.22)}
    .site-footer{background:#080c18;color:#d7dce8;padding:48px 0 28px}
    .footer-grid{display:grid;grid-template-columns:1.1fr .9fr .9fr;gap:26px}
    .footer-title{font-weight:950;font-size:20px;color:#fff;margin-bottom:10px}
    .footer-text{color:#98a2b3;font-size:14px;max-width:520px}
    .footer-links{display:grid;gap:9px}
    .footer-links a{color:#b8c0d0;transition:color .2s ease,transform .2s ease}
    .footer-links a:hover{color:#fff;transform:translateX(3px)}
    .footer-bottom{margin-top:30px;padding-top:20px;border-top:1px solid rgba(255,255,255,.1);display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;color:#8d96a8;font-size:13px}
    .mobile-panel{display:none}
    @media (max-width:1024px){
      .hero-inner,.app-panel,.service-grid,.campaign-inner,.about-board,.news-layout,.faq-wrap,.lead-form-wrap{grid-template-columns:1fr}
      .hero-inner{padding:34px}
      .release-card{max-width:none}
      .service-side{order:-1}
      .footer-grid{grid-template-columns:1fr 1fr}
      .lead-form{border-left:0;border-top:1px solid rgba(255,255,255,.1)}
    }
    @media (max-width:768px){
      .container{width:min(100% - 28px,var(--container))}
      .nav-wrap{height:68px}
      .phase-strip,.header-cta,.nav-main{display:none}
      .menu-toggle{display:inline-flex}
      .mobile-panel{
        display:none;position:absolute;left:14px;right:14px;top:76px;
        background:#fff;border:1px solid var(--line);border-radius:22px;
        box-shadow:var(--shadow);padding:14px;
      }
      .mobile-panel.open{display:block}
      .mobile-panel .nav-link{display:flex;margin-bottom:8px}
      .mobile-phases{display:flex;gap:8px;overflow-x:auto;padding:8px 0}
      .section{padding:62px 0}
      .hero{padding:26px 0 62px}
      .hero-stage{border-radius:26px}
      .hero-inner{padding:24px}
      .hero-points,.metric-grid,.service-list,.gift-grid,.compare-wrap,.form-grid{grid-template-columns:1fr}
      .countdown{grid-template-columns:repeat(4,1fr)}
      .app-visual{min-height:360px}
      .float-b{width:68%}
      .rank-row{grid-template-columns:36px 1fr;gap:10px}
      .rank-meta,.trend{grid-column:2}
      .update-item{grid-template-columns:1fr}
      .news-link{grid-template-columns:1fr}
      .footer-grid{grid-template-columns:1fr}
    }
    @media (max-width:520px){
      .brand-text{font-size:16px}
      .hero-actions .btn{width:100%}
      .countdown{gap:6px;padding:10px}
      .time-cell b{font-size:18px}
      .section-title{font-size:30px}
      .parameter-grid{grid-template-columns:1fr}
      .lead-form,.form-copy{padding:22px}
      .footer-bottom{display:block}
    }