/* roulang page: index */
:root{
      --paper:#F6F1E8;
      --linen:#E8DFD0;
      --cream:#FFF9EF;
      --ink:#1C1917;
      --muted:#6F675D;
      --soft:#9C9081;
      --red:#B85C38;
      --red-dark:#8F4128;
      --olive:#5C6B4A;
      --ochre:#C4A484;
      --studio:#2A2420;
      --line:rgba(28,25,23,.14);
      --shadow:0 12px 34px rgba(28,25,23,.08);
      --shadow-sm:0 8px 22px rgba(28,25,23,.06);
      --radius:12px;
      --radius-lg:20px;
      --container:1240px;
      --serif:"Noto Serif SC","Source Han Serif SC","Songti SC",serif;
      --sans:"Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,BlinkMacSystemFont,sans-serif;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;font-family:var(--sans);font-size:16px;line-height:1.72;color:var(--ink);background:var(--paper);overflow-x:hidden}
    body::before{content:"";position:fixed;inset:0;pointer-events:none;z-index:-1;background:
      radial-gradient(circle at 12% 8%,rgba(184,92,56,.08),transparent 28%),
      radial-gradient(circle at 86% 16%,rgba(92,107,74,.08),transparent 24%),
      linear-gradient(90deg,rgba(28,25,23,.025) 1px,transparent 1px);
      background-size:auto,auto,42px 42px}
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%;height:auto}
    button,input,select,textarea{font:inherit}
    button{cursor:pointer;border:0;background:none;color:inherit}
    :focus-visible{outline:2px solid var(--olive);outline-offset:3px}
    .container{width:min(var(--container),calc(100% - 40px));margin:0 auto}
    .section{padding:82px 0;position:relative}
    .section.alt{background:rgba(255,249,239,.55)}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;padding:5px 12px;border:1px solid rgba(184,92,56,.25);border-radius:999px;background:rgba(255,249,239,.78);color:var(--red-dark);font-size:13px;font-weight:700}
    .eyebrow::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--red)}
    h1,h2,h3{font-family:var(--serif);line-height:1.22;margin:0;color:var(--ink);font-weight:800}
    h1{font-size:clamp(30px,4vw,46px);letter-spacing:.02em}
    h2{font-size:clamp(24px,3vw,30px);letter-spacing:.01em}
    h3{font-size:20px}
    p{margin:0;color:var(--muted)}
    .section-head{display:flex;justify-content:space-between;align-items:flex-end;gap:28px;margin-bottom:34px}
    .section-head p{max-width:620px}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:46px;padding:12px 20px;border-radius:9px;font-weight:800;transition:.22s ease;border:1px solid transparent;white-space:nowrap}
    .btn.primary{background:var(--red);color:var(--cream);box-shadow:0 10px 22px rgba(184,92,56,.22)}
    .btn.primary:hover{background:var(--red-dark);border-color:var(--ink);transform:translateY(-2px)}
    .btn.secondary{background:rgba(255,249,239,.85);color:var(--red-dark);border-color:rgba(184,92,56,.48)}
    .btn.secondary:hover{background:#fff;border-color:var(--red);transform:translateY(-2px)}
    .tag{display:inline-flex;padding:4px 10px;border-radius:999px;background:rgba(196,164,132,.22);color:#6d543a;font-size:13px;font-weight:700}
    .card{background:rgba(255,249,239,.86);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-sm);transition:.22s ease}
    .card:hover{transform:translateY(-3px);border-color:rgba(184,92,56,.42);box-shadow:var(--shadow)}
    .topbar{background:#EFE6D7;border-bottom:1px solid var(--line);font-size:13px;color:#473f38}
    .topbar .container{display:flex;align-items:center;justify-content:space-between;gap:18px;min-height:38px}
    .topbar a{font-weight:800;color:var(--red-dark)}
    .top-links{display:flex;align-items:center;gap:20px;flex-wrap:wrap}
    .site-header{position:sticky;top:0;z-index:80;background:rgba(246,241,232,.88);backdrop-filter:blur(12px);border-bottom:1px solid rgba(28,25,23,.1);transition:box-shadow .2s}
    .site-header.scrolled{box-shadow:0 8px 20px rgba(28,25,23,.06)}
    .mainnav{height:72px;display:flex;align-items:center;justify-content:space-between;gap:24px}
    .logo{display:flex;align-items:center;gap:11px;font-weight:900;font-family:var(--serif);font-size:22px;letter-spacing:.03em}
    .logo-mark{width:38px;height:38px;border-radius:11px;background:linear-gradient(135deg,var(--red),#d29a72);display:grid;place-items:center;color:var(--cream);box-shadow:inset 0 0 0 1px rgba(255,255,255,.25)}
    .navlinks{display:flex;align-items:center;gap:4px}
    .navlinks a{position:relative;padding:22px 10px;font-size:15px;font-weight:800;color:#3a342f}
    .navlinks a::after{content:"";position:absolute;left:10px;right:10px;bottom:15px;height:2px;background:var(--red);transform:scaleX(0);transform-origin:left;transition:.18s}
    .navlinks a:hover::after,.navlinks a.active::after{transform:scaleX(1)}
    .navlinks a.active{color:var(--red-dark)}
    .nav-cta{display:flex;align-items:center;gap:10px}
    .menu-toggle{display:none;width:46px;height:46px;border-radius:10px;border:1px solid var(--line);background:var(--cream)}
    .menu-toggle span{display:block;width:20px;height:2px;background:var(--ink);margin:5px auto;transition:.2s}
    .mobile-drawer{display:none}
    .hero{position:relative;min-height:670px;display:grid;align-items:stretch;overflow:hidden;background:var(--studio)}
    .hero-slider{position:absolute;inset:0}
    .slide{position:absolute;inset:0;opacity:0;transition:opacity .7s ease;background-size:cover;background-position:center}
    .slide.active{opacity:1}
    .slide::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(42,36,32,.92),rgba(42,36,32,.62) 46%,rgba(42,36,32,.2)),linear-gradient(0deg,rgba(42,36,32,.58),transparent 48%)}
    .hero-content{position:relative;z-index:2;padding:92px 0 82px;color:var(--cream);display:grid;grid-template-columns:minmax(0,1fr) 390px;gap:42px;align-items:end}
    .hero h1,.hero p{color:var(--cream)}
    .hero-copy{max-width:720px}
    .hero-copy .eyebrow{background:rgba(255,249,239,.12);border-color:rgba(255,249,239,.24);color:#f4dfca;margin-bottom:18px}
    .hero-copy p{font-size:18px;max-width:680px;margin-top:18px;color:#eadfce}
    .hero-actions{display:flex;gap:14px;margin-top:28px;flex-wrap:wrap}
    .hero-panel{background:rgba(255,249,239,.12);border:1px solid rgba(255,249,239,.22);border-radius:var(--radius-lg);padding:22px;backdrop-filter:blur(8px);box-shadow:0 24px 60px rgba(0,0,0,.18)}
    .hero-panel img{height:220px;width:100%;object-fit:cover;border-radius:14px;border:1px solid rgba(255,255,255,.22)}
    .hero-badges{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:14px}
    .hero-badge{background:rgba(255,249,239,.14);border:1px solid rgba(255,249,239,.18);border-radius:12px;padding:12px}
    .hero-badge b{display:block;color:#fff;font-size:22px;font-family:var(--serif)}
    .hero-badge span{font-size:13px;color:#eadfce}
    .slider-controls{position:absolute;z-index:4;left:50%;bottom:28px;transform:translateX(-50%);display:flex;align-items:center;gap:14px}
    .slider-controls button{width:42px;height:42px;border-radius:50%;background:rgba(255,249,239,.16);color:var(--cream);border:1px solid rgba(255,249,239,.3)}
    .slider-controls button:hover{background:rgba(255,249,239,.28)}
    .dots{display:flex;gap:8px}
    .dot{width:9px;height:9px;border-radius:999px;background:rgba(255,249,239,.45);transition:.2s}
    .dot.active{width:28px;background:var(--cream)}
    .triple{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
    .mini-card{padding:24px;position:relative;overflow:hidden}
    .mini-icon{width:44px;height:44px;border-radius:13px;border:1px solid rgba(184,92,56,.28);display:grid;place-items:center;color:var(--red);font-size:22px;background:#fff8ed;margin-bottom:16px}
    .mini-card p{margin-top:8px}
    .intro-grid{display:grid;grid-template-columns:1fr 1.08fr;gap:42px;align-items:center}
    .image-frame{position:relative;border-radius:var(--radius-lg);overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow);background:var(--linen)}
    .image-frame img{width:100%;height:430px;object-fit:cover}
    .image-frame::after{content:"";position:absolute;inset:14px;border:1px solid rgba(255,249,239,.55);border-radius:14px;pointer-events:none}
    .intro-list{display:grid;gap:12px;margin-top:22px}
    .check-item{display:flex;gap:12px;align-items:flex-start;padding:13px 14px;background:rgba(255,249,239,.65);border:1px solid var(--line);border-radius:10px}
    .check-item i{font-style:normal;color:var(--olive);font-weight:900}
    .scene-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
    .scene-card{overflow:hidden}
    .scene-card img{width:100%;height:174px;object-fit:cover}
    .scene-card div{padding:18px}
    .scene-card p{margin-top:7px;font-size:15px}
    .adv-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
    .adv-card{padding:24px;position:relative}
    .adv-no{font-family:var(--serif);font-size:36px;color:rgba(184,92,56,.22);font-weight:900}
    .adv-card h3{margin-top:4px}
    .adv-card p{margin-top:10px}
    .class-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
    .class-card{overflow:hidden;display:flex;flex-direction:column}
    .class-card img{width:100%;height:210px;object-fit:cover}
    .class-body{padding:24px;display:flex;flex-direction:column;gap:14px;flex:1}
    .meta-list{display:grid;gap:9px;color:var(--muted);font-size:15px}
    .meta-list b{color:var(--ink)}
    .class-card .btn{margin-top:auto}
    .dark-section{background:var(--studio);color:var(--cream);overflow:hidden}
    .dark-section h2,.dark-section h3{color:var(--cream)}
    .dark-section p{color:#d6c9b9}
    .studio-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:42px;align-items:center}
    .wall{display:grid;grid-template-columns:1.2fr .8fr;gap:14px}
    .wall img{width:100%;object-fit:cover;border-radius:14px;border:1px solid rgba(255,249,239,.18)}
    .wall img:first-child{height:410px}
    .wall img:not(:first-child){height:198px}
    .principles{display:grid;gap:14px;margin-top:24px}
    .principle{padding:16px;border-radius:12px;background:rgba(255,249,239,.08);border:1px solid rgba(255,249,239,.14)}
    .story-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
    .story-card{padding:18px}
    .compare-imgs{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-bottom:14px}
    .compare-imgs img{height:130px;width:100%;object-fit:cover;border-radius:10px}
    .story-head{display:flex;justify-content:space-between;gap:12px;align-items:center;margin-bottom:10px}
    .stats{background:linear-gradient(90deg,rgba(92,107,74,.13),rgba(184,92,56,.11));border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:46px 0}
    .stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
    .stat-item{padding:10px 18px;border-left:1px solid rgba(28,25,23,.16)}
    .stat-item b{display:block;font-family:var(--serif);font-size:38px;color:var(--red-dark);line-height:1}
    .stat-item span{display:block;margin-top:9px;color:var(--muted);font-size:14px}
    .review-track{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;align-items:start}
    .review{padding:22px}
    .review:nth-child(even){margin-top:24px}
    .stars{color:var(--ochre);letter-spacing:2px;margin-bottom:10px}
    .review cite{display:block;margin-top:16px;font-style:normal;color:var(--ink);font-weight:800}
    .compare-table{overflow:hidden;border-radius:var(--radius-lg);border:1px solid var(--line);box-shadow:var(--shadow-sm);background:var(--cream)}
    .row{display:grid;grid-template-columns:1.05fr 1fr 1fr}
    .row>div{padding:18px 20px;border-bottom:1px solid var(--line)}
    .row>div:not(:last-child){border-right:1px solid var(--line)}
    .row.head{background:#efe3d3;font-weight:900;color:var(--ink)}
    .row:last-child>div{border-bottom:0}
    .row .good{color:var(--olive);font-weight:800}
    .timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;counter-reset:step}
    .step{padding:24px;position:relative}
    .step::before{counter-increment:step;content:"0" counter(step);display:inline-flex;margin-bottom:14px;font-family:var(--serif);font-size:30px;color:var(--red)}
    .news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
    .news-card{padding:22px}
    .date{font-size:13px;color:var(--soft);font-weight:800;margin-bottom:8px}
    .news-card p{margin-top:10px}
    .faq-wrap{display:grid;gap:12px;max-width:940px;margin:0 auto}
    .faq-item{background:var(--cream);border:1px solid var(--line);border-radius:12px;overflow:hidden}
    .faq-q{width:100%;min-height:58px;padding:16px 20px;display:flex;align-items:center;justify-content:space-between;text-align:left;font-weight:900;color:var(--ink)}
    .faq-q::after{content:"+";font-size:24px;color:var(--red);transition:.18s}
    .faq-item.open .faq-q::after{transform:rotate(45deg)}
    .faq-a{max-height:0;overflow:hidden;transition:max-height .2s ease}
    .faq-a p{padding:0 20px 18px}
    .guarantee{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .stamp{padding:18px;border:1px dashed rgba(184,92,56,.5);background:rgba(255,249,239,.75);border-radius:12px}
    .stamp b{display:block;color:var(--red-dark);font-family:var(--serif);font-size:19px;margin-bottom:5px}
    .cta-section{padding:88px 0 96px;background:linear-gradient(135deg,#fff7ea,#eadccc)}
    .cta-grid{display:grid;grid-template-columns:1fr 1.1fr;gap:36px;align-items:start}
    .contact-box{padding:28px;background:var(--studio);border-radius:var(--radius-lg);color:var(--cream)}
    .contact-box h2{color:var(--cream);margin-bottom:14px}
    .contact-box p{color:#ddcfbd}
    .contact-list{display:grid;gap:12px;margin-top:22px}
    .contact-list div{padding:13px 14px;border-radius:10px;background:rgba(255,249,239,.08);border:1px solid rgba(255,249,239,.12)}
    .lead-form{padding:28px}
    .form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
    .field{display:grid;gap:7px}
    .field.full{grid-column:1/-1}
    label{font-weight:800;color:var(--ink)}
    input,select,textarea{width:100%;border:1px solid rgba(28,25,23,.22);border-radius:10px;background:#fffaf1;color:var(--ink);padding:12px 13px;min-height:46px;transition:.18s}
    textarea{min-height:104px;resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:var(--red);box-shadow:0 0 0 3px rgba(184,92,56,.12);outline:0}
    .form-note{font-size:13px;color:var(--muted);margin-top:12px}
    .form-msg{display:none;margin-top:14px;padding:12px 14px;border-radius:10px;background:rgba(92,107,74,.12);color:var(--olive);font-weight:800}
    .form-msg.show{display:block}
    .footer{background:#201b18;color:#e8dac8;padding:54px 0 90px}
    .footer-grid{display:grid;grid-template-columns:1.25fr .85fr 1fr 1fr;gap:28px}
    .footer h3{color:#fff;font-size:18px;margin-bottom:14px}
    .footer p,.footer a,.footer li{color:#cdbfab;font-size:14px}
    .footer ul{list-style:none;margin:0;padding:0;display:grid;gap:8px}
    .footer a:hover{color:#fff;text-decoration:underline}
    .copyright{margin-top:34px;padding-top:20px;border-top:1px solid rgba(255,249,239,.12);font-size:13px;color:#b8aa98;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}
    .fixed-cta{position:fixed;left:50%;bottom:18px;transform:translate(-50%,120%);z-index:90;width:min(720px,calc(100% - 24px));background:rgba(42,36,32,.94);color:var(--cream);border:1px solid rgba(255,249,239,.18);border-radius:16px;box-shadow:0 18px 42px rgba(0,0,0,.24);padding:10px;display:flex;align-items:center;justify-content:space-between;gap:10px;transition:.28s ease}
    .fixed-cta.show{transform:translate(-50%,0)}
    .fixed-cta span{font-weight:800;padding-left:10px}
    .fixed-actions{display:flex;gap:8px}
    .fixed-actions a{min-height:42px;padding:9px 14px;border-radius:9px;font-weight:900}
    .fixed-actions a:first-child{background:rgba(255,249,239,.12);border:1px solid rgba(255,249,239,.22)}
    .fixed-actions a:last-child{background:var(--red);color:#fff}
    @media (max-width:1100px){
      .navlinks{display:none}
      .menu-toggle{display:block}
      .mobile-drawer{display:block;position:fixed;left:0;right:0;top:111px;background:rgba(246,241,232,.98);border-bottom:1px solid var(--line);box-shadow:var(--shadow);transform:translateY(-130%);transition:.24s ease;z-index:75;padding:12px 20px 22px}
      .mobile-drawer.open{transform:translateY(0)}
      .mobile-drawer a{display:flex;align-items:center;min-height:46px;border-bottom:1px solid rgba(28,25,23,.08);font-weight:900}
      .mobile-drawer .btn{margin-top:14px;width:100%}
      .hero-content{grid-template-columns:1fr}
      .hero-panel{max-width:520px}
      .scene-grid,.guarantee,.stats-grid{grid-template-columns:repeat(2,1fr)}
      .adv-grid,.class-grid,.story-grid,.news-grid,.review-track{grid-template-columns:repeat(2,1fr)}
      .timeline{grid-template-columns:repeat(2,1fr)}
      .footer-grid{grid-template-columns:1fr 1fr}
    }
    @media (max-width:768px){
      .container{width:min(100% - 28px,var(--container))}
      .section{padding:58px 0}
      .topbar .container{min-height:58px}
      .top-links span:nth-child(2),.top-links span:nth-child(3){display:none}
      .mainnav{height:66px}
      .nav-cta .btn{display:none}
      .mobile-drawer{top:124px}
      .hero{min-height:720px}
      .hero-content{padding:68px 0 96px}
      .hero-copy p{font-size:16px}
      .hero-actions .btn{width:100%}
      .slider-controls{bottom:18px}
      .section-head{display:block}
      .section-head p{margin-top:12px}
      .triple,.intro-grid,.studio-grid,.cta-grid{grid-template-columns:1fr}
      .scene-grid,.adv-grid,.class-grid,.story-grid,.news-grid,.review-track,.timeline,.guarantee,.stats-grid{grid-template-columns:1fr}
      .review:nth-child(even){margin-top:0}
      .wall{grid-template-columns:1fr}
      .wall img:first-child,.wall img:not(:first-child){height:240px}
      .row{grid-template-columns:1fr}
      .row>div{border-right:0!important}
      .row.head>div:not(:first-child){display:none}
      .form-grid{grid-template-columns:1fr}
      .footer-grid{grid-template-columns:1fr}
      .fixed-cta{bottom:10px;align-items:stretch;flex-direction:column}
      .fixed-cta span{padding-left:4px;font-size:14px}
      .fixed-actions{display:grid;grid-template-columns:1fr 1fr}
      .fixed-actions a{text-align:center}
    }
    @media (max-width:420px){
      h1{font-size:29px}
      .hero-badges{grid-template-columns:1fr}
      .topbar{font-size:12px}
      .logo{font-size:19px}
      .logo-mark{width:34px;height:34px}
      .class-card img,.scene-card img{height:180px}
      .copyright{padding-bottom:20px}
    }
    @media (prefers-reduced-motion:reduce){
      *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;scroll-behavior:auto!important;transition-duration:.01ms!important}
    }