/* roulang page: index */
:root{
      --primary:#7c3aed;
      --primary-dark:#5b21b6;
      --primary-soft:#ede9fe;
      --secondary:#06b6d4;
      --accent:#f97316;
      --ink:#14121f;
      --muted:#676174;
      --weak:#8a8397;
      --bg:#fbf8ff;
      --panel:#ffffff;
      --panel-2:#f5f0ff;
      --line:rgba(42,31,75,.12);
      --line-strong:rgba(42,31,75,.22);
      --radius-sm:14px;
      --radius-md:22px;
      --radius-lg:32px;
      --shadow-sm:0 10px 30px rgba(50,37,91,.08);
      --shadow-md:0 22px 60px rgba(50,37,91,.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 7% 8%, rgba(124,58,237,.13), transparent 32%),
        radial-gradient(circle at 88% 2%, rgba(6,182,212,.14), transparent 30%),
        linear-gradient(180deg,#fff 0%,var(--bg) 44%,#fff 100%);
      line-height:1.7;
      -webkit-font-smoothing:antialiased;
      text-rendering:optimizeLegibility;
    }
    a{color:inherit;text-decoration:none}
    img,svg{max-width:100%;display:block}
    button,input,textarea{font:inherit}
    button{cursor:pointer}
    ::selection{background:rgba(124,58,237,.22)}
    .container-custom{width:min(var(--container), calc(100% - 40px));margin:0 auto}
    .top-strip{
      background:linear-gradient(90deg,#201338,#36156b 45%,#0e7490);
      color:rgba(255,255,255,.86);
      font-size:13px;
      border-bottom:1px solid rgba(255,255,255,.12);
    }
    .top-strip a{color:#fff;font-weight:700}
    .site-header{
      position:sticky;
      top:0;
      z-index:50;
      background:rgba(255,255,255,.82);
      backdrop-filter:blur(22px);
      border-bottom:1px solid var(--line);
      box-shadow:0 10px 30px rgba(41,31,75,.05);
    }
    .brand-mark{
      width:42px;height:42px;border-radius:16px;
      display:grid;place-items:center;
      background:linear-gradient(135deg,var(--primary),#d946ef 52%,var(--secondary));
      box-shadow:0 12px 34px rgba(124,58,237,.28);
      color:#fff;font-weight:900;
      letter-spacing:-.05em;
    }
    .nav-link{
      position:relative;
      display:inline-flex;
      align-items:center;
      gap:8px;
      padding:10px 14px;
      border-radius:999px;
      color:#4f4861;
      font-weight:700;
      transition:color .2s ease, background .2s ease, transform .2s ease;
    }
    .nav-link:hover{color:var(--primary-dark);background:var(--primary-soft);transform:translateY(-1px)}
    .nav-link.active{color:#fff;background:linear-gradient(135deg,var(--primary),#9f5cff);box-shadow:0 12px 28px rgba(124,58,237,.22)}
    .search-pill{
      display:flex;align-items:center;gap:8px;
      min-width:260px;
      padding:10px 14px;
      border:1px solid var(--line);
      border-radius:999px;
      background:rgba(255,255,255,.72);
      color:var(--weak);
      box-shadow:inset 0 1px 0 rgba(255,255,255,.8);
    }
    .mobile-menu{
      display:none;
      margin-top:12px;
      padding:14px;
      border-radius:22px;
      border:1px solid var(--line);
      background:#fff;
      box-shadow:var(--shadow-sm);
    }
    .mobile-menu.open{display:block}
    .section-pad{padding:82px 0}
    .section-pad-sm{padding:56px 0}
    .eyebrow{
      display:inline-flex;align-items:center;gap:8px;
      padding:7px 12px;
      border:1px solid rgba(124,58,237,.18);
      background:rgba(237,233,254,.75);
      color:var(--primary-dark);
      border-radius:999px;
      font-size:13px;
      font-weight:800;
      letter-spacing:.02em;
    }
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:9px;
      border:1px solid transparent;
      border-radius:999px;
      padding:13px 20px;
      font-weight:900;
      line-height:1;
      transition:transform .18s ease, box-shadow .18s ease, background .18s ease, border-color .18s ease, color .18s ease;
      white-space:nowrap;
    }
    .btn:focus-visible,.nav-link:focus-visible,input:focus-visible,a:focus-visible,button:focus-visible{
      outline:3px solid rgba(6,182,212,.32);
      outline-offset:3px;
    }
    .btn-primary{
      color:#fff;
      background:linear-gradient(135deg,var(--primary),#d946ef);
      box-shadow:0 18px 42px rgba(124,58,237,.3);
    }
    .btn-primary:hover{transform:translateY(-2px);box-shadow:0 24px 54px rgba(124,58,237,.38)}
    .btn-secondary{
      color:var(--primary-dark);
      background:#fff;
      border-color:rgba(124,58,237,.18);
      box-shadow:var(--shadow-sm);
    }
    .btn-secondary:hover{transform:translateY(-2px);border-color:rgba(124,58,237,.36);background:#fbfaff}
    .btn-ghost{
      color:#fff;
      background:rgba(255,255,255,.13);
      border-color:rgba(255,255,255,.22);
    }
    .btn-ghost:hover{background:rgba(255,255,255,.22);transform:translateY(-2px)}
    .hero-wrap{
      position:relative;
      overflow:hidden;
      border-radius:0 0 46px 46px;
      padding:72px 0 76px;
    }
    .hero-wrap:before{
      content:"";
      position:absolute;inset:0;
      background:
        linear-gradient(120deg,rgba(32,19,56,.96),rgba(91,33,182,.9) 45%,rgba(8,145,178,.82)),
        radial-gradient(circle at 72% 18%,rgba(249,115,22,.4),transparent 28%);
      z-index:-2;
    }
    .hero-wrap:after{
      content:"";
      position:absolute;
      width:560px;height:560px;border-radius:999px;
      right:-160px;top:-180px;
      background:radial-gradient(circle,rgba(255,255,255,.28),transparent 62%);
      z-index:-1;
    }
    .hero-stage{
      display:grid;
      grid-template-columns:minmax(0,1.05fr) minmax(300px,.75fr);
      gap:42px;
      align-items:center;
    }
    .hero-title{
      color:#fff;
      font-size:clamp(38px,6vw,76px);
      line-height:1.02;
      font-weight:1000;
      letter-spacing:-.06em;
      max-width:820px;
    }
    .hero-desc{
      color:rgba(255,255,255,.78);
      font-size:18px;
      max-width:760px;
      margin-top:22px;
    }
    .hero-data{
      display:grid;
      grid-template-columns:repeat(3,minmax(0,1fr));
      gap:14px;
      margin-top:30px;
      max-width:760px;
    }
    .data-badge{
      padding:16px;
      border-radius:20px;
      background:rgba(255,255,255,.12);
      border:1px solid rgba(255,255,255,.18);
      color:#fff;
      backdrop-filter:blur(14px);
    }
    .data-badge strong{display:block;font-size:25px;line-height:1;font-weight:1000}
    .data-badge span{display:block;margin-top:7px;color:rgba(255,255,255,.72);font-size:13px}
    .vertical-reel{
      width:min(360px,100%);
      margin-left:auto;
      border-radius:38px;
      padding:16px;
      background:linear-gradient(145deg,rgba(255,255,255,.24),rgba(255,255,255,.08));
      border:1px solid rgba(255,255,255,.22);
      box-shadow:var(--shadow-glow);
      transform:rotate(1.5deg);
    }
    .reel-screen{
      min-height:560px;
      border-radius:30px;
      overflow:hidden;
      position:relative;
      background:
        linear-gradient(180deg,rgba(10,8,20,.02),rgba(10,8,20,.9)),
        radial-gradient(circle at 40% 20%,rgba(249,115,22,.55),transparent 26%),
        linear-gradient(145deg,#a855f7,#06b6d4);
      padding:18px;
      display:flex;
      flex-direction:column;
      justify-content:space-between;
      color:#fff;
    }
    .reel-card{
      border-radius:22px;
      padding:14px;
      background:rgba(255,255,255,.13);
      border:1px solid rgba(255,255,255,.18);
      backdrop-filter:blur(14px);
    }
    .avatar-row{display:flex;align-items:center}
    .avatar{
      width:32px;height:32px;border-radius:999px;
      border:2px solid rgba(255,255,255,.8);
      background:linear-gradient(135deg,#fff,#dbeafe);
      margin-left:-8px;
    }
    .avatar:first-child{margin-left:0}
    .floating-tags{
      display:flex;flex-wrap:wrap;gap:10px;
      margin-top:24px;
    }
    .tag{
      display:inline-flex;align-items:center;gap:7px;
      border-radius:999px;
      padding:9px 13px;
      background:#fff;
      border:1px solid var(--line);
      color:#514860;
      font-size:14px;
      font-weight:800;
      box-shadow:var(--shadow-sm);
      transition:transform .18s ease, box-shadow .18s ease, border-color .18s ease;
    }
    .tag:hover{transform:translateY(-2px);box-shadow:var(--shadow-md);border-color:rgba(124,58,237,.25)}
    .section-head{
      display:flex;
      align-items:end;
      justify-content:space-between;
      gap:24px;
      margin-bottom:30px;
    }
    .section-head h2{
      font-size:clamp(28px,3vw,44px);
      line-height:1.15;
      letter-spacing:-.04em;
      font-weight:1000;
      margin-top:12px;
    }
    .section-head p{color:var(--muted);max-width:660px;margin-top:12px}
    .panel{
      background:rgba(255,255,255,.82);
      border:1px solid var(--line);
      border-radius:var(--radius-lg);
      box-shadow:var(--shadow-sm);
      backdrop-filter:blur(18px);
    }
    .nav-series{
      display:grid;
      grid-template-columns:1.1fr .9fr;
      gap:24px;
      align-items:stretch;
    }
    .series-grid{
      display:grid;
      grid-template-columns:repeat(2,minmax(0,1fr));
      gap:14px;
    }
    .series-item{
      padding:18px;
      border-radius:24px;
      background:#fff;
      border:1px solid var(--line);
      transition:transform .18s ease, box-shadow .18s ease, border-color .18s ease;
    }
    .series-item:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:rgba(124,58,237,.26)}
    .icon-dot{
      width:42px;height:42px;border-radius:16px;
      display:grid;place-items:center;
      background:linear-gradient(135deg,var(--primary-soft),#e0f2fe);
      color:var(--primary-dark);
      font-weight:1000;
    }
    .hot-layout{
      display:grid;
      grid-template-columns:.9fr 1.25fr;
      gap:24px;
      align-items:stretch;
    }
    .rank-card{
      padding:24px;
      border-radius:32px;
      background:linear-gradient(145deg,#24143f,#5b21b6);
      color:#fff;
      min-height:100%;
      position:relative;
      overflow:hidden;
    }
    .rank-card:after{
      content:"";
      position:absolute;
      right:-80px;bottom:-90px;width:240px;height:240px;border-radius:999px;
      background:rgba(255,255,255,.12);
    }
    .rank-list{display:grid;gap:14px;margin-top:24px;position:relative;z-index:1}
    .rank-list li{
      display:flex;justify-content:space-between;gap:12px;
      padding:14px;
      border-radius:18px;
      background:rgba(255,255,255,.11);
      border:1px solid rgba(255,255,255,.14);
    }
    .product-grid{
      display:grid;
      grid-template-columns:repeat(2,minmax(0,1fr));
      gap:16px;
    }
    .product-card{
      padding:22px;
      border-radius:28px;
      border:1px solid var(--line);
      background:#fff;
      box-shadow:var(--shadow-sm);
      transition:transform .18s ease, box-shadow .18s ease, border-color .18s ease;
    }
    .product-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:rgba(6,182,212,.26)}
    .label{
      display:inline-flex;align-items:center;
      padding:6px 10px;
      border-radius:999px;
      background:#ecfeff;
      color:#0e7490;
      font-size:12px;
      font-weight:900;
    }
    .news-layout{
      display:grid;
      grid-template-columns:minmax(0,1.35fr) minmax(280px,.65fr);
      gap:24px;
    }
    .news-list{display:grid;gap:12px}
    .news-link{
      display:grid;
      grid-template-columns:auto 1fr auto;
      gap:14px;
      align-items:center;
      padding:17px;
      border-radius:22px;
      background:#fff;
      border:1px solid var(--line);
      transition:transform .18s ease, box-shadow .18s ease, border-color .18s ease;
    }
    .news-link:hover{transform:translateX(4px);box-shadow:var(--shadow-sm);border-color:rgba(124,58,237,.24)}
    .date-pill{
      width:58px;
      border-radius:16px;
      padding:9px 7px;
      text-align:center;
      background:var(--panel-2);
      color:var(--primary-dark);
      font-weight:1000;
      line-height:1.1;
    }
    .date-pill span{display:block;font-size:12px;color:var(--weak);font-weight:800;margin-top:3px}
    .recommend-card{
      padding:24px;
      border-radius:30px;
      background:linear-gradient(180deg,#fff,#f4f0ff);
      border:1px solid var(--line);
      box-shadow:var(--shadow-sm);
      position:sticky;
      top:118px;
    }
    .member-band{
      overflow:hidden;
      position:relative;
      border-radius:38px;
      padding:34px;
      background:
        radial-gradient(circle at 14% 22%,rgba(249,115,22,.18),transparent 25%),
        linear-gradient(135deg,#201338,#6d28d9 55%,#0891b2);
      color:#fff;
      box-shadow:var(--shadow-glow);
    }
    .member-band:after{
      content:"";
      position:absolute;right:-80px;top:-90px;width:300px;height:300px;border-radius:999px;
      background:rgba(255,255,255,.13);
    }
    .plan-grid{
      display:grid;
      grid-template-columns:repeat(3,minmax(0,1fr));
      gap:16px;
      margin-top:26px;
      position:relative;
      z-index:1;
    }
    .plan-card{
      padding:20px;
      border-radius:26px;
      background:rgba(255,255,255,.12);
      border:1px solid rgba(255,255,255,.18);
      backdrop-filter:blur(16px);
    }
    .scene-grid{
      display:grid;
      grid-template-columns:.88fr 1.12fr;
      gap:24px;
      align-items:center;
    }
    .step-list{display:grid;gap:14px}
    .step-item{
      display:grid;
      grid-template-columns:auto 1fr;
      gap:14px;
      padding:18px;
      border-radius:24px;
      background:#fff;
      border:1px solid var(--line);
      box-shadow:var(--shadow-sm);
    }
    .step-num{
      width:42px;height:42px;border-radius:16px;
      display:grid;place-items:center;
      background:linear-gradient(135deg,var(--primary),#06b6d4);
      color:#fff;
      font-weight:1000;
    }
    .timeline{
      display:grid;
      grid-template-columns:repeat(4,minmax(0,1fr));
      gap:14px;
    }
    .time-node{
      position:relative;
      padding:20px;
      border-radius:26px;
      background:#fff;
      border:1px solid var(--line);
      box-shadow:var(--shadow-sm);
    }
    .time-node:before{
      content:"";
      position:absolute;
      top:20px;right:20px;
      width:10px;height:10px;border-radius:999px;
      background:var(--accent);
      box-shadow:0 0 0 7px rgba(249,115,22,.13);
    }
    .progress-grid{
      display:grid;
      grid-template-columns:1fr 1fr;
      gap:18px;
    }
    .progress-card{
      padding:22px;
      border-radius:28px;
      border:1px solid var(--line);
      background:#fff;
      box-shadow:var(--shadow-sm);
    }
    .bar{
      height:12px;
      border-radius:999px;
      background:#ede9fe;
      overflow:hidden;
      margin-top:14px;
    }
    .bar span{
      display:block;height:100%;
      border-radius:999px;
      background:linear-gradient(90deg,var(--primary),var(--secondary));
    }
    .faq-grid{
      display:grid;
      grid-template-columns:.78fr 1.22fr;
      gap:24px;
      align-items:start;
    }
    .faq-list{display:grid;gap:12px}
    .faq-item{
      border:1px solid var(--line);
      border-radius:24px;
      background:#fff;
      overflow:hidden;
      box-shadow:var(--shadow-sm);
    }
    .faq-question{
      width:100%;
      display:flex;
      justify-content:space-between;
      gap:18px;
      padding:18px 20px;
      border:0;
      background:transparent;
      text-align:left;
      color:var(--ink);
      font-weight:900;
    }
    .faq-answer{
      display:none;
      padding:0 20px 20px;
      color:var(--muted);
    }
    .faq-item.open .faq-answer{display:block}
    .faq-item.open .faq-question{color:var(--primary-dark)}
    .cta-box{
      border-radius:38px;
      padding:34px;
      background:linear-gradient(135deg,#fff,#f3efff);
      border:1px solid var(--line);
      box-shadow:var(--shadow-md);
      display:grid;
      grid-template-columns:1.05fr .95fr;
      gap:24px;
      align-items:center;
    }
    .form-row{
      display:flex;
      gap:12px;
      padding:8px;
      border-radius:999px;
      background:#fff;
      border:1px solid var(--line);
      box-shadow:var(--shadow-sm);
    }
    .form-row input{
      flex:1;
      border:0;
      outline:none;
      padding:0 14px;
      color:var(--ink);
      min-width:0;
      background:transparent;
    }
    .site-footer{
      margin-top:30px;
      padding:48px 0 30px;
      background:#160f25;
      color:rgba(255,255,255,.76);
    }
    .footer-grid{
      display:grid;
      grid-template-columns:1.1fr .8fr .8fr;
      gap:28px;
      align-items:start;
    }
    .footer-link{
      display:block;
      padding:6px 0;
      color:rgba(255,255,255,.72);
      transition:color .18s ease, transform .18s ease;
    }
    .footer-link:hover{color:#fff;transform:translateX(3px)}
    .divider{height:1px;background:rgba(255,255,255,.12);margin:28px 0 18px}
    .glass-note{
      padding:16px;
      border-radius:22px;
      background:rgba(255,255,255,.1);
      border:1px solid rgba(255,255,255,.14);
    }
    @media (max-width:1024px){
      .search-pill{display:none}
      .hero-stage,.nav-series,.hot-layout,.news-layout,.scene-grid,.faq-grid,.cta-box{grid-template-columns:1fr}
      .vertical-reel{margin:20px auto 0;transform:none}
      .timeline{grid-template-columns:repeat(2,minmax(0,1fr))}
      .recommend-card{position:relative;top:auto}
    }
    @media (max-width:768px){
      .container-custom{width:min(100% - 28px,var(--container))}
      .desktop-nav{display:none}
      .mobile-toggle{display:inline-flex}
      .hero-wrap{padding:48px 0 56px;border-radius:0 0 30px 30px}
      .hero-data,.plan-grid,.progress-grid,.footer-grid{grid-template-columns:1fr}
      .section-pad{padding:58px 0}
      .section-head{display:block}
      .series-grid,.product-grid{grid-template-columns:1fr}
      .news-link{grid-template-columns:auto 1fr}
      .news-link .arrow{display:none}
      .reel-screen{min-height:470px}
      .cta-box,.member-band{padding:24px}
      .form-row{border-radius:24px;flex-direction:column;padding:12px}
      .form-row input{padding:12px}
      .form-row .btn{width:100%}
    }
    @media (max-width:520px){
      .top-strip .container-custom{flex-direction:column;align-items:flex-start;gap:6px}
      .hero-title{font-size:38px}
      .hero-desc{font-size:16px}
      .timeline{grid-template-columns:1fr}
      .btn{width:100%;white-space:normal}
      .hero-actions{flex-direction:column;width:100%}
      .floating-tags{gap:8px}
      .brand-name{max-width:190px}
    }