/* roulang page: index */
:root{
      --bg:#fbf7ef;
      --surface:#fffaf1;
      --surface-2:#ffffff;
      --ink:#18202f;
      --muted:#667085;
      --subtle:#8b7867;
      --primary:#8d2332;
      --primary-2:#c54759;
      --accent:#f4b95a;
      --accent-2:#fde7b1;
      --line:#eadfce;
      --deep:#24161a;
      --radius-sm:12px;
      --radius:20px;
      --radius-lg:30px;
      --shadow:0 18px 50px rgba(33, 28, 22, .10);
      --shadow-2:0 22px 70px rgba(141, 35, 50, .18);
      --container:1180px;
    }

    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;
      color:var(--ink);
      background:
        radial-gradient(circle at top left, rgba(244,185,90,.22), transparent 34rem),
        radial-gradient(circle at top right, rgba(197,71,89,.12), transparent 36rem),
        linear-gradient(180deg,var(--bg),#fff 56%,#fff8ed);
      line-height:1.75;
      text-rendering:optimizeLegibility;
         }
    body.is-locked{overflow:hidden}
    a{color:inherit;text-decoration:none}
    img{max-width:100%;display:block}
    button,input,select,textarea{font:inherit}
    button{cursor:pointer}
    ::selection{background:rgba(141,35,50,.18);color:var(--primary)}
    .container{width:min(var(--container),calc(100% - 40px));margin-inline:auto}
    .section{padding:76px 0}
    .section-tight{padding:48px 0}
    .eyebrow{
      display:inline-flex;align-items:center;gap:8px;
      padding:8px 12px;border:1px solid rgba(141,35,50,.18);
      border-radius:999px;background:rgba(255,250,241,.82);
      color:var(--primary);font-size:13px;font-weight:800;letter-spacing:.08em
    }
    .eyebrow::before{
      content:"";width:8px;height:8px;border-radius:50%;
      background:linear-gradient(135deg,var(--primary),var(--accent));
      box-shadow:0 0 0 4px rgba(141,35,50,.10)
    }
    .section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:28px;margin-bottom:28px}
    .section-title{font-size:clamp(28px,4vw,44px);line-height:1.18;letter-spacing:-.04em;font-weight:950;color:var(--ink);margin:12px 0 0}
    .section-desc{max-width:680px;color:var(--muted);font-size:16px;margin:12px 0 0}
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:10px;
      border:1px solid transparent;border-radius:999px;
      min-height:48px;padding:13px 20px;font-weight:900;
      transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease,background .22s ease,color .22s ease;
      white-space:nowrap
    }
    .btn:focus-visible,.nav-link:focus-visible,.mast-search input:focus-visible,.form-control:focus-visible{
      outline:3px solid rgba(244,185,90,.42);outline-offset:3px
    }
    .btn-primary{background:linear-gradient(135deg,var(--primary),var(--primary-2));color:#fff;box-shadow:0 14px 28px rgba(141,35,50,.22)}
    .btn-primary:hover{transform:translateY(-2px);box-shadow:var(--shadow-2)}
    .btn-secondary{background:#fff;color:var(--primary);border-color:rgba(141,35,50,.20);box-shadow:0 10px 22px rgba(33,28,22,.06)}
    .btn-secondary:hover{transform:translateY(-2px);border-color:rgba(141,35,50,.38);box-shadow:var(--shadow)}
    .btn-ghost{background:rgba(255,255,255,.70);border-color:rgba(234,223,206,.95);color:var(--ink)}
    .btn-ghost:hover{background:#fff;transform:translateY(-2px)}
    .badge{
      display:inline-flex;align-items:center;gap:6px;
      padding:6px 10px;border-radius:999px;background:rgba(244,185,90,.18);
      color:#8a5a10;font-size:12px;font-weight:900
    }
    .badge.dark{background:rgba(24,32,47,.10);color:var(--ink)}
    .badge.hot{background:rgba(141,35,50,.10);color:var(--primary)}
    .card{
      border:1px solid rgba(234,223,206,.95);
      background:rgba(255,255,255,.78);
      border-radius:var(--radius);
      box-shadow:0 12px 34px rgba(33,28,22,.06);
      transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease
    }
    .card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:rgba(141,35,50,.18)}
    .site-header{
      position:sticky;top:0;z-index:50;
      background:rgba(251,247,239,.88);
      backdrop-filter:saturate(160%) blur(18px);
      border-bottom:1px solid rgba(234,223,206,.78)
    }
    .mast-top{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:18px 0 12px}
    .brand-wrap{display:flex;align-items:center;gap:16px;min-width:0}
    .brand-mark{
      width:48px;height:48px;border-radius:16px;
      display:grid;place-items:center;flex:0 0 auto;
      color:#fff;font-weight:950;font-size:20px;
      background:
        linear-gradient(135deg,rgba(255,255,255,.18),transparent),
        linear-gradient(135deg,var(--primary),#32151c);
      box-shadow:0 14px 30px rgba(141,35,50,.22)
    }
    .brand-name{
      font-family:"Songti SC","Noto Serif SC",serif;
      font-size:clamp(25px,3.1vw,44px);
      line-height:1.05;font-weight:900;letter-spacing:-.06em;
      color:var(--deep)
    }
    .mast-rule{height:42px;width:1px;background:linear-gradient(180deg,transparent,var(--line),transparent);display:block}
    .mast-note{color:var(--subtle);font-size:13px;max-width:260px;line-height:1.6}
    .mast-search{
      display:flex;align-items:center;gap:10px;
      background:#fff;border:1px solid rgba(234,223,206,.92);
      border-radius:999px;padding:6px 8px 6px 16px;
      box-shadow:0 10px 28px rgba(33,28,22,.05);
      min-width:260px
    }
    .mast-search input{border:0;outline:0;background:transparent;width:100%;color:var(--ink)}
    .mast-search input::placeholder{color:#a18f7d}
    .mast-search button{
      border:0;border-radius:999px;background:var(--deep);color:#fff;
      width:36px;height:36px;display:grid;place-items:center;
      transition:background .2s ease,transform .2s ease
    }
    .mast-search button:hover{background:var(--primary);transform:scale(1.04)}
    .nav-row{border-top:1px solid rgba(234,223,206,.85)}
    .nav-inner{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:10px 0}
    .nav-list{display:flex;align-items:center;gap:8px;margin:0;padding:0;list-style:none}
    .nav-link{
      display:inline-flex;align-items:center;justify-content:center;
      min-height:40px;padding:8px 15px;border-radius:999px;
      color:var(--subtle);font-weight:900;font-size:14px;
      transition:background .2s ease,color .2s ease,transform .2s ease
    }
    .nav-link:hover{background:rgba(141,35,50,.08);color:var(--primary);transform:translateY(-1px)}
    .nav-link.active{background:var(--deep);color:#fff}
    .age-chip{
      display:inline-flex;align-items:center;gap:8px;
      color:var(--primary);font-weight:950;font-size:13px;
      padding:8px 12px;border-radius:999px;background:rgba(141,35,50,.08)
    }
    .menu-btn{display:none;border:0;background:var(--deep);color:#fff;border-radius:14px;padding:10px 12px;font-weight:900}
    .hero{padding:44px 0 72px}
    .hero-panel{
      position:relative;overflow:hidden;
      border:1px solid rgba(234,223,206,.92);
      border-radius:36px;
      background:
        linear-gradient(135deg,rgba(255,255,255,.94),rgba(255,250,241,.86)),
        radial-gradient(circle at 20% 15%,rgba(244,185,90,.26),transparent 24rem),
        radial-gradient(circle at 78% 32%,rgba(141,35,50,.14),transparent 28rem);
      box-shadow:var(--shadow);
      padding:clamp(24px,4vw,46px)
    }
    .hero-panel::after{
      content:"";position:absolute;inset:auto -80px -120px auto;
      width:360px;height:360px;border-radius:50%;
      background:rgba(244,185,90,.20);filter:blur(6px)
    }
    .hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:1.05fr .95fr;gap:34px;align-items:stretch}
    .hero h1{
      margin:16px 0 14px;
      font-size:clamp(38px,6vw,72px);
      line-height:1.03;letter-spacing:-.07em;font-weight:950;color:var(--deep)
    }
    .hero-intro{font-size:18px;color:var(--muted);max-width:710px;margin:0 0 24px}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin:26px 0}
    .hero-data{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-top:26px}
    .data-pill{
      background:rgba(255,255,255,.76);border:1px solid rgba(234,223,206,.88);
      border-radius:18px;padding:14px 15px
    }
    .data-num{display:block;font-size:24px;line-height:1;font-weight:950;color:var(--primary)}
    .data-text{display:block;margin-top:6px;color:var(--subtle);font-size:13px;font-weight:800}
    .lead-stage{display:grid;grid-template-columns:.85fr 1fr;gap:16px}
    .cover-card{
      min-height:390px;border-radius:30px;padding:24px;color:#fff;overflow:hidden;position:relative;
      background:
        linear-gradient(160deg,rgba(141,35,50,.95),rgba(36,22,26,.96)),
        radial-gradient(circle at 80% 20%,rgba(244,185,90,.35),transparent 14rem);
      box-shadow:0 24px 60px rgba(36,22,26,.25)
    }
    .cover-card::before{
      content:"";position:absolute;inset:18px;border:1px solid rgba(255,255,255,.20);border-radius:22px
    }
    .cover-label{position:relative;z-index:1;color:rgba(255,255,255,.76);font-size:13px;font-weight:900;letter-spacing:.12em}
    .cover-title{position:relative;z-index:1;margin:50px 0 0;font-size:34px;line-height:1.14;font-weight:950;letter-spacing:-.04em}
    .cover-foot{position:absolute;left:24px;right:24px;bottom:24px;display:flex;align-items:center;justify-content:space-between;gap:12px;z-index:1;color:rgba(255,255,255,.8);font-size:13px}
    .toc-card,.download-card{padding:22px}
    .toc-list{list-style:none;padding:0;margin:18px 0 0;display:grid;gap:12px}
    .toc-list li{display:flex;align-items:flex-start;gap:12px;color:var(--muted);font-size:14px}
    .toc-list b{width:26px;height:26px;border-radius:9px;background:rgba(141,35,50,.09);color:var(--primary);display:grid;place-items:center;flex:0 0 auto;font-size:12px}
    .download-card{margin-top:16px;background:#fff}
    .lead-form{display:grid;gap:12px;margin-top:14px}
    .form-control{
      width:100%;min-height:46px;border:1px solid rgba(234,223,206,.95);
      border-radius:14px;background:#fff;padding:11px 13px;outline:0;color:var(--ink);
      transition:border-color .2s ease,box-shadow .2s ease
    }
    .form-control:focus{border-color:rgba(141,35,50,.42);box-shadow:0 0 0 4px rgba(141,35,50,.08)}
    .check-line{display:flex;align-items:flex-start;gap:10px;color:var(--muted);font-size:13px;line-height:1.55}
    .check-line input{margin-top:4px;accent-color:var(--primary)}
    .form-tip{font-size:13px;color:var(--subtle);margin:10px 0 0}
    .deal-rail{display:flex;gap:16px;overflow-x:auto;padding:4px 4px 18px;scroll-snap-type:x mandatory}
    .deal-rail::-webkit-scrollbar{height:8px}
    .deal-rail::-webkit-scrollbar-thumb{background:rgba(141,35,50,.25);border-radius:99px}
    .deal-card{
      scroll-snap-align:start;min-width:276px;padding:18px;
      background:linear-gradient(180deg,#fff,rgba(255,250,241,.92));
      border:1px solid rgba(234,223,206,.95);border-radius:24px;
      box-shadow:0 14px 34px rgba(33,28,22,.07)
    }
    .deal-top{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:14px}
    .deal-icon{
      width:46px;height:46px;border-radius:16px;display:grid;place-items:center;
      background:rgba(141,35,50,.10);color:var(--primary);font-size:22px
    }
    .deal-card h3{font-size:20px;line-height:1.25;margin:10px 0 8px;font-weight:950;letter-spacing:-.03em}
    .deal-card p{color:var(--muted);font-size:14px;margin:0 0 16px}
    .price-line{display:flex;align-items:flex-end;gap:8px;margin:12px 0}
    .price{font-size:30px;line-height:1;font-weight:950;color:var(--primary)}
    .price small{font-size:13px;color:var(--subtle);font-weight:800}
    .old-price{color:#a89786;text-decoration:line-through;font-size:13px}
    .stock-panel{
      display:grid;grid-template-columns:.9fr 1.1fr;gap:22px;align-items:center;
      padding:26px;border-radius:30px;background:var(--deep);color:#fff;overflow:hidden;position:relative
    }
    .stock-panel::after{content:"";position:absolute;right:-70px;top:-90px;width:260px;height:260px;border-radius:50%;background:rgba(244,185,90,.18)}
    .stock-copy{position:relative;z-index:1}
    .stock-copy .eyebrow{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.16);color:#ffd989}
    .stock-copy h2{font-size:clamp(28px,4vw,46px);line-height:1.14;margin:14px 0 12px;letter-spacing:-.05em;font-weight:950}
    .stock-copy p{color:rgba(255,255,255,.74);margin:0}
    .stock-board{position:relative;z-index:1;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.14);border-radius:24px;padding:20px}
    .progress-wrap{display:grid;gap:15px}
    .progress-item{display:grid;gap:8px}
    .progress-label{display:flex;align-items:center;justify-content:space-between;gap:12px;color:rgba(255,255,255,.84);font-size:14px;font-weight:800}
    .progress-bar{height:12px;border-radius:999px;background:rgba(255,255,255,.12);overflow:hidden}
    .progress-fill{height:100%;border-radius:inherit;background:linear-gradient(90deg,var(--accent),#fff0bd)}
    .news-layout{display:grid;grid-template-columns:1fr 360px;gap:22px;align-items:start}
    .news-list{background:#fff;border:1px solid rgba(234,223,206,.95);border-radius:26px;overflow:hidden;box-shadow:0 14px 36px rgba(33,28,22,.06)}
    .news-item{display:grid;grid-template-columns:110px 1fr auto;gap:18px;align-items:center;padding:18px 20px;border-bottom:1px solid rgba(234,223,206,.78);transition:background .2s ease}
    .news-item:last-child{border-bottom:0}
    .news-item:hover{background:rgba(255,250,241,.92)}
    .news-date{font-weight:950;color:var(--primary);font-size:14px}
    .news-title{font-weight:950;line-height:1.45}
    .news-title:hover{color:var(--primary)}
    .news-summary{color:var(--muted);font-size:14px;margin-top:5px}
    .news-arrow{color:#b69c83;font-weight:950}
    .recommend-card{padding:22px;background:linear-gradient(180deg,#fff,var(--cream));position:sticky;top:132px}
    .recommend-card h3{font-size:22px;margin:12px 0 10px;font-weight:950;letter-spacing:-.03em}
    .recommend-card p{color:var(--muted);font-size:14px;margin:0 0 18px}
    .mini-list{display:grid;gap:10px;margin:18px 0}
    .mini-item{display:flex;justify-content:space-between;gap:14px;padding:12px;border-radius:16px;background:rgba(255,255,255,.78);border:1px solid rgba(234,223,206,.82)}
    .mini-item span:first-child{font-weight:900}
    .mini-item span:last-child{color:var(--primary);font-weight:950}
    .action-zone{
      border-radius:34px;padding:30px;
      background:
        linear-gradient(135deg,rgba(141,35,50,.96),rgba(36,22,26,.98)),
        radial-gradient(circle at 20% 20%,rgba(244,185,90,.22),transparent 24rem);
      color:#fff;box-shadow:var(--shadow-2)
    }
    .action-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:24px;align-items:center}
    .action-zone h2{font-size:clamp(28px,4vw,46px);line-height:1.14;margin:10px 0 12px;font-weight:950;letter-spacing:-.05em}
    .action-zone p{color:rgba(255,255,255,.74);margin:0}
    .button-matrix{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
    .action-btn{
      display:flex;align-items:center;justify-content:space-between;gap:16px;
      min-height:72px;padding:16px;border-radius:20px;background:rgba(255,255,255,.10);
      border:1px solid rgba(255,255,255,.15);transition:background .22s ease,transform .22s ease,border-color .22s ease
    }
    .action-btn:hover{background:rgba(255,255,255,.16);transform:translateY(-3px);border-color:rgba(255,255,255,.30)}
    .action-btn b{display:block;font-size:16px}
    .action-btn small{display:block;color:rgba(255,255,255,.68);margin-top:2px}
    .quick-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .quick-card{padding:22px}
    .quick-card .symbol{width:48px;height:48px;border-radius:16px;display:grid;place-items:center;background:rgba(141,35,50,.09);color:var(--primary);font-size:24px;margin-bottom:16px}
    .quick-card h3{font-size:20px;margin:0 0 8px;font-weight:950;letter-spacing:-.03em}
    .quick-card p{margin:0;color:var(--muted);font-size:14px}
    .faq-wrap{display:grid;grid-template-columns:370px 1fr;gap:24px;align-items:start}
    .faq-side{position:sticky;top:132px}
    .faq-list{display:grid;gap:12px}
    .faq-item{border:1px solid rgba(234,223,206,.95);border-radius:22px;background:#fff;overflow:hidden;box-shadow:0 12px 30px rgba(33,28,22,.05)}
    .faq-q{
      width:100%;border:0;background:transparent;padding:18px 20px;
      display:flex;align-items:center;justify-content:space-between;gap:16px;
      color:var(--ink);font-weight:950;text-align:left
    }
    .faq-q span{font-size:18px;line-height:1.45}
    .faq-q i{width:30px;height:30px;border-radius:50%;background:rgba(141,35,50,.08);color:var(--primary);display:grid;place-items:center;font-style:normal;flex:0 0 auto;transition:transform .2s ease}
    .faq-a{display:none;padding:0 20px 20px;color:var(--muted);font-size:15px}
    .faq-item.open .faq-a{display:block}
    .faq-item.open .faq-q i{transform:rotate(45deg)}
    .site-footer{
      background:var(--deep);color:rgba(255,255,255,.76);
      padding:48px 0 26px;margin-top:34px
    }
    .footer-grid{display:grid;grid-template-columns:1.1fr .6fr .8fr;gap:28px;align-items:start}
    .footer-brand{font-family:"Songti SC","Noto Serif SC",serif;color:#fff;font-size:30px;line-height:1.15;font-weight:950;letter-spacing:-.05em;margin-bottom:12px}
    .footer-text{margin:0;color:rgba(255,255,255,.64);font-size:14px;max-width:560px}
    .footer-title{color:#fff;font-weight:950;margin:0 0 12px}
    .footer-links{display:grid;gap:9px}
    .footer-links a{color:rgba(255,255,255,.68);transition:color .2s ease,transform .2s ease}
    .footer-links a:hover{color:#fff;transform:translateX(3px)}
    .footer-note{padding-top:24px;margin-top:28px;border-top:1px solid rgba(255,255,255,.12);display:flex;justify-content:space-between;gap:18px;flex-wrap:wrap;font-size:13px;color:rgba(255,255,255,.52)}
    .toast{
      position:fixed;left:50%;bottom:24px;transform:translateX(-50%) translateY(16px);
      opacity:0;pointer-events:none;z-index:80;background:var(--deep);color:#fff;
      border:1px solid rgba(255,255,255,.15);border-radius:999px;padding:12px 18px;
      box-shadow:0 18px 45px rgba(0,0,0,.22);transition:opacity .25s ease,transform .25s ease
    }
    .toast.show{opacity:1;transform:translateX(-50%) translateY(0)}
    @media (max-width:1024px){
      .mast-note,.mast-rule{display:none}
      .hero-grid,.stock-panel,.action-grid,.faq-wrap{grid-template-columns:1fr}
      .lead-stage{grid-template-columns:1fr 1fr}
      .news-layout{grid-template-columns:1fr}
      .recommend-card,.faq-side{position:static}
      .quick-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
    }
    @media (max-width:768px){
      .container{width:min(100% - 28px,var(--container))}
      .section{padding:56px 0}
      .mast-top{align-items:flex-start}
      .mast-search{display:none}
      .menu-btn{display:inline-flex}
      .nav-inner{align-items:flex-start}
      .nav-list{
        display:none;position:absolute;left:14px;right:14px;top:100%;
        background:rgba(255,250,241,.98);border:1px solid rgba(234,223,206,.95);
        border-radius:22px;box-shadow:var(--shadow);padding:12px;flex-direction:column;align-items:stretch
      }
      .site-header.nav-open .nav-list{display:flex}
      .nav-link{justify-content:flex-start}
      .age-chip{font-size:12px}
      .hero{padding-top:24px}
      .hero-panel{border-radius:28px}
      .lead-stage,.hero-data,.button-matrix{grid-template-columns:1fr}
      .cover-card{min-height:320px}
      .section-head{display:block}
      .news-item{grid-template-columns:1fr;gap:7px}
      .news-arrow{display:none}
      .footer-grid{grid-template-columns:1fr}
    }
    @media (max-width:520px){
      body{line-height:1.68}
      .brand-mark{width:42px;height:42px;border-radius:14px}
      .brand-name{font-size:24px}
      .hero h1{font-size:40px}
      .hero-intro{font-size:16px}
      .hero-actions .btn,.deal-card .btn,.action-zone .btn{width:100%}
      .deal-card{min-width:248px}
      .quick-grid{grid-template-columns:1fr}
      .stock-panel,.action-zone{padding:22px;border-radius:26px}
      .cover-title{font-size:28px}
      .footer-note{display:block}
    }