/* roulang page: index */
:root{
      --color-ink:#1E2329;
      --color-dark:#15181C;
      --color-dark-2:#22272E;
      --color-primary:#F97316;
      --color-primary-dark:#C2410C;
      --color-accent:#22C55E;
      --color-muted:#667085;
      --color-line:#E5E7EB;
      --color-bg:#F7F5F0;
      --color-card:#FFFFFF;
      --color-danger:#8A2D2D;
      --radius-sm:10px;
      --radius-md:16px;
      --radius-lg:24px;
      --shadow-sm:0 8px 24px rgba(30,35,41,.08);
      --shadow-md:0 18px 50px rgba(30,35,41,.14);
      --container:1180px;
      --nav-h:118px;
      --ease:all .25s ease;
    }
    *{box-sizing:border-box;margin:0;padding:0}
    html{scroll-behavior:smooth}
    body{
      font-family:PingFang SC,Microsoft YaHei,Noto Sans SC,Arial,sans-serif;
      color:var(--color-ink);
      background:var(--color-bg);
      line-height:1.65;
      min-width:320px;
      overflow-x:hidden;
      padding-bottom:78px;
    }
    a{color:inherit;text-decoration:none}
    img{max-width:100%;display:block}
    button,input,select,textarea{font:inherit}
    button{border:0;background:none;cursor:pointer}
    input,textarea{width:100%}
    :focus-visible{outline:3px solid rgba(249,115,22,.35);outline-offset:3px}
    .container{width:min(var(--container),calc(100% - 40px));margin:0 auto}
    .section{padding:88px 0;scroll-margin-top:132px}
    .section.tight{padding:58px 0}
    .eyebrow{
      display:inline-flex;align-items:center;gap:8px;
      padding:7px 12px;border:1px solid rgba(249,115,22,.22);
      border-radius:999px;background:#fff4eb;color:var(--color-primary-dark);
      font-size:13px;font-weight:700;
    }
    .eyebrow:before{content:"";width:8px;height:8px;border-radius:50%;background:var(--color-accent);box-shadow:0 0 0 4px rgba(34,197,94,.12)}
    h1,h2,h3{line-height:1.18;color:var(--color-ink);letter-spacing:-.02em}
    h1{font-size:clamp(34px,5vw,64px);font-weight:900}
    h2{font-size:clamp(26px,3vw,42px);font-weight:850;margin-top:14px}
    h3{font-size:20px;font-weight:800}
    .section-head{display:flex;justify-content:space-between;align-items:flex-end;gap:28px;margin-bottom:34px}
    .section-head p{max-width:680px;color:var(--color-muted);font-size:16px}
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      min-height:46px;padding:12px 20px;border-radius:14px;
      font-weight:800;transition:var(--ease);border:1px solid transparent;
      white-space:nowrap;
    }
    .btn-primary{background:var(--color-primary);color:#fff;box-shadow:0 10px 22px rgba(249,115,22,.26)}
    .btn-primary:hover{background:var(--color-primary-dark);transform:translateY(-2px)}
    .btn-secondary{background:#fff;color:var(--color-ink);border-color:rgba(30,35,41,.14)}
    .btn-secondary:hover{border-color:rgba(249,115,22,.45);background:#fff7ed;transform:translateY(-2px)}
    .btn-dark{background:#252A31;color:#fff;border-color:rgba(255,255,255,.12)}
    .btn-dark:hover{background:#333941;border-color:rgba(249,115,22,.55)}
    .badge,.tag{
      display:inline-flex;align-items:center;gap:6px;border-radius:999px;
      padding:6px 10px;font-size:12px;font-weight:750;border:1px solid var(--color-line);
      background:#fff;color:var(--color-muted);
    }
    .tag.ok{color:#167A3C;background:#ECFDF3;border-color:#BBF7D0}
    .tag.warn{color:#A9470B;background:#FFF7ED;border-color:#FED7AA}
    .tag.risk{color:#8A2D2D;background:#FFF1F2;border-color:#FECACA}
    .card{
      background:var(--color-card);border:1px solid rgba(30,35,41,.08);
      border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);
      transition:var(--ease);overflow:hidden;
    }
    .card:hover{transform:translateY(-4px);border-color:rgba(249,115,22,.35);box-shadow:var(--shadow-md)}
    .site-header{
      position:sticky;top:0;z-index:90;background:rgba(247,245,240,.94);
      backdrop-filter:blur(14px);border-bottom:1px solid rgba(30,35,41,.08);
      transition:var(--ease);
    }
    .site-header.is-scrolled{box-shadow:0 10px 24px rgba(30,35,41,.08)}
    .topbar{border-bottom:1px solid rgba(30,35,41,.06);font-size:13px;color:var(--color-muted)}
    .topbar-inner,.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:18px}
    .topbar-inner{min-height:42px}
    .brand{display:flex;align-items:center;gap:12px;font-weight:900;color:var(--color-ink)}
    .brand-mark{
      width:38px;height:38px;border-radius:13px;background:linear-gradient(135deg,var(--color-primary),#ffb86b);
      display:grid;place-items:center;color:#fff;box-shadow:0 10px 20px rgba(249,115,22,.22);
      position:relative;overflow:hidden;
    }
    .brand-mark:after{content:"";position:absolute;width:24px;height:2px;background:rgba(255,255,255,.75);transform:rotate(-28deg)}
    .brand span{font-size:20px}
    .top-info{display:flex;align-items:center;gap:18px;flex-wrap:wrap;justify-content:flex-end}
    .trust-pill{color:#167A3C;background:#ECFDF3;border-radius:999px;padding:4px 10px;font-weight:700}
    .nav-inner{min-height:72px}
    .nav-links{display:flex;align-items:center;gap:4px}
    .nav-links a{
      padding:10px 12px;border-radius:12px;color:#3B4149;font-weight:750;font-size:15px;
      transition:var(--ease);
    }
    .nav-links a:hover,.nav-links a.active{background:#fff;color:var(--color-primary-dark)}
    .nav-actions{display:flex;align-items:center;gap:12px}
    .menu-toggle{display:none;width:46px;height:46px;border-radius:14px;background:#fff;border:1px solid var(--color-line)}
    .menu-toggle span{display:block;width:20px;height:2px;background:var(--color-ink);margin:5px auto;border-radius:2px;transition:var(--ease)}
    .hero{
      position:relative;min-height:680px;display:flex;align-items:center;overflow:hidden;color:#fff;
      background:#101316;
    }
    .hero-slider{position:absolute;inset:0}
    .hero-slide{
      position:absolute;inset:0;opacity:0;transition:opacity .7s ease;
      background-size:cover;background-position:center;
    }
    .hero-slide.active{opacity:1}
    .hero-slide:before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(15,18,22,.88),rgba(15,18,22,.54),rgba(15,18,22,.72))}
    .hero-slide:after{
      content:"";position:absolute;inset:auto 0 0;height:8px;
      background:repeating-linear-gradient(90deg,var(--color-primary) 0 60px,transparent 60px 86px);
      opacity:.9;
    }
    .hero-content{position:relative;z-index:2;width:100%;padding:70px 0}
    .hero-grid{display:grid;grid-template-columns:1.08fr .72fr;gap:42px;align-items:center}
    .hero h1{color:#fff;margin:16px 0}
    .hero-intro{font-size:18px;color:rgba(255,255,255,.82);max-width:720px;margin-bottom:26px}
    .hero-badges{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:16px}
    .hero-badges .badge{background:rgba(255,255,255,.12);border-color:rgba(255,255,255,.22);color:#fff}
    .hero-cta{display:flex;gap:14px;flex-wrap:wrap;margin-top:20px}
    .hero-panel{
      background:rgba(255,255,255,.94);color:var(--color-ink);border-radius:28px;
      padding:24px;border:1px solid rgba(255,255,255,.6);box-shadow:0 24px 80px rgba(0,0,0,.26);
    }
    .promo-sticker{
      display:inline-flex;align-items:center;gap:8px;background:var(--color-primary);
      color:#fff;border-radius:999px;padding:8px 12px;font-weight:900;font-size:13px;
      transform:rotate(-2deg);box-shadow:0 10px 22px rgba(249,115,22,.26);
    }
    .quick-list{display:grid;gap:12px;margin-top:18px}
    .quick-item{display:flex;justify-content:space-between;gap:14px;padding:14px;border-radius:16px;background:#F8FAFC;border:1px solid var(--color-line)}
    .quick-item strong{display:block}
    .quick-item small{color:var(--color-muted)}
    .hero-controls{position:absolute;z-index:3;left:50%;bottom:28px;transform:translateX(-50%);display:flex;align-items:center;gap:10px}
    .hero-dot{width:11px;height:11px;border-radius:50%;background:rgba(255,255,255,.45)}
    .hero-dot.active{width:32px;border-radius:99px;background:var(--color-primary)}
    .hero-arrow{width:42px;height:42px;border-radius:50%;display:grid;place-items:center;color:#fff;border:1px solid rgba(255,255,255,.24);background:rgba(255,255,255,.12)}
    .sell-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
    .sell-card{padding:22px;position:relative}
    .sell-card:before{content:attr(data-no);position:absolute;right:18px;top:14px;color:#EEF0F2;font-size:46px;font-weight:900;line-height:1}
    .chip-line{height:8px;border-radius:99px;background:linear-gradient(90deg,var(--color-accent) 0 42%,#D1D5DB 42% 100%);margin:16px 0}
    .intro-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:42px;align-items:center}
    .image-stack{position:relative}
    .image-stack img{border-radius:28px;box-shadow:var(--shadow-md);aspect-ratio:4/3;object-fit:cover}
    .image-note{position:absolute;right:-18px;bottom:22px;background:#fff;border-radius:18px;padding:14px 16px;box-shadow:var(--shadow-md);border:1px solid var(--color-line);max-width:240px}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
    .adv-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
    .adv-card{padding:22px}
    .icon-box{width:44px;height:44px;border-radius:14px;background:#FFF7ED;color:var(--color-primary);display:grid;place-items:center;font-weight:900;margin-bottom:16px}
    .check-list{display:grid;gap:8px;margin-top:14px;color:var(--color-muted);font-size:14px}
    .check-list li{list-style:none;display:flex;gap:8px}
    .check-list li:before{content:"✓";color:var(--color-accent);font-weight:900}
    .products-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
    .product-card{padding:0}
    .product-top{padding:22px;background:linear-gradient(135deg,#FFF7ED,#FFFFFF);border-bottom:1px solid var(--color-line)}
    .product-meta{display:flex;gap:8px;flex-wrap:wrap;margin:14px 0}
    .product-body{padding:22px}
    .price-line{display:flex;align-items:flex-end;gap:8px;margin-top:12px}
    .price-line strong{font-size:28px;color:var(--color-primary-dark)}
    .scene-grid{display:grid;grid-template-columns:1fr .9fr;gap:36px;align-items:center}
    .timeline{display:grid;gap:14px}
    .time-item{display:grid;grid-template-columns:64px 1fr;gap:16px;align-items:start}
    .time-dot{width:48px;height:48px;border-radius:50%;background:#fff;border:2px solid var(--color-primary);display:grid;place-items:center;font-weight:900;color:var(--color-primary-dark);box-shadow:var(--shadow-sm)}
    .time-item p{color:var(--color-muted)}
    .photo-collage{display:grid;grid-template-columns:1fr 1fr;gap:14px}
    .photo-collage img{height:210px;width:100%;object-fit:cover;border-radius:20px;box-shadow:var(--shadow-sm)}
    .photo-collage img:first-child{grid-row:span 2;height:434px}
    .dark-section{background:var(--color-dark);color:#fff;position:relative;overflow:hidden}
    .dark-section h2,.dark-section h3{color:#fff}
    .dark-section:before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 78% 15%,rgba(34,197,94,.16),transparent 32%),linear-gradient(110deg,transparent 0 60%,rgba(249,115,22,.12));pointer-events:none}
    .dark-grid{position:relative;display:grid;grid-template-columns:1fr .85fr;gap:34px;align-items:center}
    .case-big{padding:30px;border-radius:28px;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12)}
    .case-big p{color:rgba(255,255,255,.72)}
    .finding-list{display:grid;gap:14px}
    .finding{padding:18px;border-radius:18px;background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.12)}
    .finding b{color:#86EFAC}
    .stories-grid{display:grid;grid-template-columns:1fr 1fr 1fr;gap:18px}
    .story-card{display:grid;grid-template-rows:auto 1fr;padding:0}
    .story-card img{height:170px;width:100%;object-fit:cover}
    .story-card div{padding:20px}
    .stat-strip{background:#fff;border-top:1px solid var(--color-line);border-bottom:1px solid var(--color-line)}
    .stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .stat{padding:24px;border-radius:20px;background:#F8FAFC;border:1px solid var(--color-line)}
    .stat strong{display:block;font-size:34px;line-height:1;color:var(--color-primary-dark)}
    .stat span{color:var(--color-muted);font-size:14px}
    .reviews-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
    .review-card{padding:22px}
    .stars{color:#F59E0B;letter-spacing:2px;margin-bottom:10px}
    .reviewer{display:flex;justify-content:space-between;gap:12px;margin-top:18px;color:var(--color-muted);font-size:14px}
    .compare-wrap{background:#fff;border:1px solid var(--color-line);border-radius:24px;overflow:hidden;box-shadow:var(--shadow-sm)}
    .compare-row{display:grid;grid-template-columns:1fr 1fr 1fr;border-bottom:1px solid var(--color-line)}
    .compare-row:last-child{border-bottom:0}
    .compare-cell{padding:18px;border-right:1px solid var(--color-line)}
    .compare-cell:last-child{border-right:0}
    .compare-head{background:#22272E;color:#fff;font-weight:900}
    .compare-good{color:var(--color-primary-dark);font-weight:800}
    .compare-risk{color:var(--color-danger)}
    .news-grid{display:grid;grid-template-columns:1.2fr .8fr .8fr;gap:18px}
    .news-card{padding:20px}
    .news-card.featured{display:grid;grid-template-columns:1fr 1fr;gap:18px;align-items:center}
    .news-card img{border-radius:18px;height:220px;width:100%;object-fit:cover}
    .news-date{font-weight:800;color:var(--color-primary-dark);font-size:13px;margin-bottom:8px}
    .faq-list{display:grid;gap:12px}
    .faq-item{background:#fff;border:1px solid var(--color-line);border-radius:18px;overflow:hidden}
    .faq-q{width:100%;min-height:58px;padding:18px 20px;display:flex;align-items:center;justify-content:space-between;gap:18px;text-align:left;font-weight:850;color:var(--color-ink)}
    .faq-q span:last-child{width:26px;height:26px;border-radius:50%;display:grid;place-items:center;background:#FFF7ED;color:var(--color-primary-dark);flex:0 0 auto}
    .faq-a{max-height:0;overflow:hidden;transition:max-height .25s ease}
    .faq-a p{padding:0 20px 18px;color:var(--color-muted)}
    .faq-item.open .faq-a{max-height:180px}
    .faq-item.open .faq-q span:last-child{background:var(--color-primary);color:#fff}
    .cta-panel{
      background:linear-gradient(135deg,#1B1F24,#30343A);border-radius:32px;padding:30px;
      color:#fff;display:grid;grid-template-columns:.85fr 1.15fr;gap:30px;align-items:center;position:relative;overflow:hidden;
    }
    .cta-panel:before{content:"";position:absolute;right:-80px;top:-80px;width:240px;height:240px;border-radius:50%;background:rgba(249,115,22,.22)}
    .cta-panel h2{color:#fff}
    .guarantee{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-bottom:20px}
    .guarantee div{padding:14px;border-radius:16px;background:#fff;border:1px solid var(--color-line);font-weight:800}
    .lead-form{position:relative;background:#fff;color:var(--color-ink);border-radius:24px;padding:22px;box-shadow:var(--shadow-md)}
    .form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
    .field label{display:block;font-weight:750;margin-bottom:6px;font-size:14px}
    .field input,.field textarea{
      min-height:46px;border:1px solid var(--color-line);border-radius:14px;padding:11px 12px;background:#F9FAFB;color:var(--color-ink);
      transition:var(--ease);
    }
    .field input:focus,.field textarea:focus{border-color:var(--color-primary);background:#fff;outline:none;box-shadow:0 0 0 4px rgba(249,115,22,.12)}
    .field.full{grid-column:1/-1}
    .form-note{font-size:13px;color:var(--color-muted);margin-top:12px}
    .form-msg{display:none;margin-top:12px;padding:10px 12px;border-radius:12px;background:#ECFDF3;color:#167A3C;font-weight:700}
    .site-footer{background:var(--color-dark);color:rgba(255,255,255,.76);padding:54px 0 28px}
    .footer-grid{display:grid;grid-template-columns:1.1fr .7fr .9fr;gap:30px}
    .footer-logo{color:#fff;margin-bottom:14px}
    .footer-links{display:flex;flex-wrap:wrap;gap:10px;margin-top:12px}
    .footer-links a{padding:8px 10px;border-radius:10px;background:rgba(255,255,255,.06);transition:var(--ease)}
    .footer-links a:hover{background:rgba(249,115,22,.22);color:#fff}
    .footer-title{color:#fff;font-weight:900;margin-bottom:12px}
    .copyright{border-top:1px solid rgba(255,255,255,.1);margin-top:34px;padding-top:20px;font-size:13px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}
    .fixed-cta{
      position:fixed;right:22px;bottom:18px;z-index:95;background:#fff;border:1px solid var(--color-line);
      border-radius:20px;box-shadow:0 18px 50px rgba(30,35,41,.22);padding:10px;display:flex;align-items:center;gap:10px;
    }
    .fixed-cta span{font-weight:850;padding-left:6px}
    @media (max-width:1024px){
      .hero-grid,.intro-grid,.scene-grid,.dark-grid,.cta-panel{grid-template-columns:1fr}
      .hero{min-height:auto}
      .adv-grid,.products-grid,.stories-grid,.reviews-grid{grid-template-columns:repeat(2,1fr)}
      .news-grid{grid-template-columns:1fr 1fr}
      .news-card.featured{grid-column:1/-1}
      .footer-grid{grid-template-columns:1fr 1fr}
    }
    @media (max-width:860px){
      .container{width:min(100% - 28px,var(--container))}
      .topbar-inner{align-items:flex-start;flex-direction:column;padding:10px 0}
      .top-info{justify-content:flex-start;gap:10px}
      .nav-inner{min-height:64px}
      .menu-toggle{display:block}
      .nav-links{
        position:fixed;left:14px;right:14px;top:112px;background:#fff;border:1px solid var(--color-line);
        border-radius:22px;box-shadow:var(--shadow-md);padding:14px;display:grid;gap:4px;
        opacity:0;visibility:hidden;transform:translateY(-8px);transition:var(--ease);max-height:calc(100vh - 140px);overflow:auto;
      }
      .nav-links.open{opacity:1;visibility:visible;transform:translateY(0)}
      .nav-links a{min-height:44px;display:flex;align-items:center}
      .nav-actions .btn{display:none}
      .sell-grid,.adv-grid,.products-grid,.stories-grid,.reviews-grid,.stats-grid,.guarantee{grid-template-columns:1fr 1fr}
      .compare-row{grid-template-columns:1fr}
      .compare-cell{border-right:0;border-bottom:1px solid var(--color-line)}
      .compare-cell:last-child{border-bottom:0}
      .compare-head .compare-cell:not(:first-child){display:none}
      .section{padding:64px 0}
      .section-head{display:block}
      .section-head p{margin-top:12px}
    }
    @media (max-width:620px){
      body{padding-bottom:92px}
      .hero-content{padding:48px 0 74px}
      .hero-intro{font-size:16px}
      .hero-panel{padding:18px;border-radius:22px}
      .hero-cta .btn{width:100%}
      .sell-grid,.adv-grid,.products-grid,.stories-grid,.reviews-grid,.stats-grid,.news-grid,.guarantee,.form-grid,.footer-grid{grid-template-columns:1fr}
      .news-card.featured{grid-template-columns:1fr}
      .photo-collage{grid-template-columns:1fr}
      .photo-collage img,.photo-collage img:first-child{height:220px;grid-row:auto}
      .time-item{grid-template-columns:46px 1fr}
      .time-dot{width:42px;height:42px}
      .image-note{position:static;margin-top:12px;max-width:none}
      .fixed-cta{left:10px;right:10px;bottom:10px;justify-content:space-between;border-radius:18px}
      .fixed-cta span{display:none}
      .fixed-cta .btn{min-height:48px;padding:10px 12px;flex:1}
      .top-info span:nth-child(2){display:none}
    }
    @media (max-width:375px){
      .container{width:calc(100% - 22px)}
      .brand span{font-size:18px}
      .btn{white-space:normal;text-align:center}
      h1{font-size:32px}
      .quick-item{display:block}
    }