/* roulang page: index */
:root{
      --ink:#25242b;
      --muted:#77737c;
      --soft:#f7f4f0;
      --paper:#fffdfb;
      --line:#e9e2dc;
      --wine:#8e3150;
      --wine-dark:#641d38;
      --rose:#d88b91;
      --gold:#c89a54;
      --shadow:0 18px 48px rgba(66,35,40,.11);
      --shadow-sm:0 8px 22px rgba(66,35,40,.08);
      --radius:18px;
      --container:1180px;
    }
    *{box-sizing:border-box;margin:0;padding:0}
    html{scroll-behavior:smooth}
    body{font-family:"Noto Sans SC",sans-serif;color:var(--ink);background:var(--paper);line-height:1.75;font-size:15px}
    a{color:inherit;text-decoration:none}
    img{display:block;width:100%;object-fit:cover}
    button,input{font:inherit}
    button{cursor:pointer;border:0}
    :focus-visible{outline:3px solid rgba(200,154,84,.55);outline-offset:3px}
    .container{width:min(var(--container),calc(100% - 48px));margin:auto}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--wine);font-size:12px;font-weight:800;letter-spacing:2px;text-transform:uppercase}
    .eyebrow:before{content:"";width:24px;height:2px;background:var(--gold)}
    .section{padding:96px 0;position:relative}
    .section.alt{background:var(--soft)}
    .section-head{display:flex;justify-content:space-between;align-items:end;gap:24px;margin-bottom:34px}
    .section-head h2{font-size:clamp(25px,3vw,40px);line-height:1.25;letter-spacing:0;font-weight:800;margin-top:10px}
    .section-head p{max-width:560px;color:var(--muted);font-size:15px}
    .text-link{color:var(--wine);font-weight:700;white-space:nowrap}
    .text-link:hover{color:var(--gold)}
    .site-header{height:78px;background:rgba(255,253,251,.94);border-bottom:1px solid var(--line);display:flex;align-items:center;position:sticky;top:0;z-index:20;backdrop-filter:blur(14px)}
    .nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:24px}
    .brand{display:flex;align-items:center;gap:11px;font-weight:800;white-space:nowrap}
    .brand-mark{width:38px;height:38px;border-radius:11px;background:var(--wine);color:#fff;display:grid;place-items:center;font-family:Georgia,serif;font-size:22px;box-shadow:0 7px 15px rgba(142,49,80,.2)}
    .brand-name{font-size:16px}
    .nav-list{display:flex;align-items:center;gap:26px;list-style:none;color:#625d64;font-size:14px}
    .nav-list a{padding:8px 0;position:relative}
    .nav-list a:after{content:"";position:absolute;left:0;right:100%;bottom:0;height:2px;background:var(--wine);transition:.25s}
    .nav-list a:hover,.nav-list a.active{color:var(--wine)}
    .nav-list a:hover:after,.nav-list a.active:after{right:0}
    .header-action{display:inline-flex;align-items:center;gap:8px;color:#fff;background:var(--wine);padding:10px 17px;border-radius:9px;font-size:13px;font-weight:700;transition:.25s}
    .header-action:hover{background:var(--wine-dark);transform:translateY(-2px)}
    .menu-toggle{display:none;background:none;color:var(--wine);font-size:25px}
    .hero{min-height:660px;color:#fff;position:relative;display:flex;align-items:center;overflow:hidden;background:#291c22}
    .hero-media{position:absolute;inset:0}
    .hero-media video{width:100%;height:100%;object-fit:cover;opacity:.52}
    .hero-media:after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(29,15,23,.9) 0%,rgba(44,22,31,.62) 48%,rgba(29,15,23,.28) 100%)}
    .hero-content{position:relative;z-index:1;padding:100px 0 88px;max-width:770px}
    .hero .eyebrow{color:#e7bc7d}
    .hero h1{font-size:clamp(38px,6vw,74px);line-height:1.12;letter-spacing:0;font-weight:800;margin:22px 0 22px}
    .hero h1 em{font-style:normal;color:#efbd78}
    .hero-lead{font-size:17px;line-height:2;color:rgba(255,255,255,.84);max-width:720px}
    .hero-actions{display:flex;gap:13px;flex-wrap:wrap;margin-top:32px}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;padding:13px 22px;border-radius:9px;font-weight:700;transition:.25s;border:1px solid transparent}
    .btn-primary{background:#e3ad69;color:#341c23}
    .btn-primary:hover{background:#f0c27f;transform:translateY(-2px)}
    .btn-ghost{border-color:rgba(255,255,255,.42);color:#fff;background:rgba(255,255,255,.08)}
    .btn-ghost:hover{background:#fff;color:var(--wine)}
    .hero-note{display:flex;gap:24px;margin-top:48px;font-size:13px;color:rgba(255,255,255,.7)}
    .hero-note strong{display:block;color:#fff;font-size:20px}
    .play-button{position:absolute;right:10%;bottom:82px;z-index:2;width:82px;height:82px;border:1px solid rgba(255,255,255,.65);border-radius:50%;background:rgba(255,255,255,.12);color:#fff;font-size:25px;backdrop-filter:blur(8px);transition:.25s}
    .play-button:hover{background:#e3ad69;color:#341c23;transform:scale(1.06)}
    .signal-band{padding:22px 0;background:var(--wine);color:#fff}
    .signal-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
    .signal{border-left:1px solid rgba(255,255,255,.28);padding-left:20px}
    .signal:first-child{border-left:0}
    .signal strong{font-size:25px;display:block;color:#f0c27f}
    .signal span{font-size:13px;color:rgba(255,255,255,.75)}
    .statement{background:#fff;padding:75px 0 85px}
    .statement-grid{display:grid;grid-template-columns:1fr 1.2fr;gap:80px;align-items:center}
    .statement h2{font-size:clamp(28px,4vw,48px);line-height:1.3;margin-top:14px}
    .statement-copy{font-size:17px;color:#5f5960;line-height:2}
    .quote-line{border-left:3px solid var(--gold);padding:8px 0 8px 22px;margin-top:26px;color:var(--wine);font-weight:700}
    .feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
    .feature{padding:28px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-sm);transition:.25s}
    .feature:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
    .feature-icon{width:44px;height:44px;display:grid;place-items:center;border-radius:12px;background:#f6e8e6;color:var(--wine);font-size:21px;margin-bottom:18px}
    .feature h3{font-size:20px;margin-bottom:9px}
    .feature p{color:var(--muted);font-size:14px;line-height:1.85}
    .demo{background:#2d2027;color:#fff}
    .demo-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:58px;align-items:center}
    .demo h2{font-size:clamp(28px,4vw,45px);line-height:1.3;margin:14px 0 18px}
    .demo p{color:rgba(255,255,255,.72);line-height:2}
    .demo-list{list-style:none;margin-top:28px}
    .demo-list li{display:flex;gap:12px;padding:13px 0;border-bottom:1px solid rgba(255,255,255,.14);color:#eee}
    .demo-list b{color:#e3ad69}
    .reading-board{background:#49313a;border:1px solid rgba(255,255,255,.14);padding:30px;border-radius:20px;box-shadow:0 20px 50px rgba(0,0,0,.24)}
    .board-top{display:flex;justify-content:space-between;align-items:center;color:#e8c18c;margin-bottom:24px}
    .board-title{font-size:20px;font-weight:700;color:#fff}
    .board-line{display:flex;justify-content:space-between;align-items:center;padding:17px 0;border-top:1px solid rgba(255,255,255,.13)}
    .board-line span{color:rgba(255,255,255,.62);font-size:13px}
    .board-line strong{font-size:15px}
    .board-line b{color:#e3ad69;font-size:14px}
    .result-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:24px}
    .result-feature{min-height:360px;border-radius:var(--radius);overflow:hidden;position:relative;background:url("https://images.unsplash.com/photo-1512820790803-83ca734da794?auto=format&fit=crop&w=1200&q=85") center/cover}
    .result-feature:after{content:"";position:absolute;inset:35% 0 0;background:linear-gradient(transparent,rgba(27,14,20,.9))}
    .result-caption{position:absolute;z-index:1;bottom:25px;left:28px;right:28px;color:#fff}
    .result-caption h3{font-size:27px;margin:9px 0}
    .result-side{display:grid;grid-template-rows:1fr 1fr;gap:24px}
    .mini-story{background:#f6efeb;border:1px solid var(--line);border-radius:var(--radius);padding:26px;display:flex;flex-direction:column;justify-content:space-between}
    .mini-story h3{font-size:21px;line-height:1.45}
    .mini-story p{font-size:14px;color:var(--muted);margin-top:10px}
    .tag{display:inline-flex;align-items:center;padding:4px 9px;border-radius:5px;background:#f7e3df;color:var(--wine);font-size:11px;font-weight:800}
    .tag.dark{background:rgba(227,173,105,.16);color:#edc487}
    .catalog-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
    .book-card{background:#fff;border:1px solid var(--line);border-radius:14px;overflow:hidden;transition:.25s;box-shadow:0 5px 16px rgba(70,35,38,.04)}
    .book-card:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
    .book-cover{height:228px;position:relative;overflow:hidden}
    .book-cover img{height:100%;transition:.45s}
    .book-card:hover .book-cover img{transform:scale(1.05)}
    .badge{position:absolute;top:12px;left:12px;background:var(--wine);color:#fff;padding:4px 8px;border-radius:5px;font-size:11px;font-weight:700}
    .book-info{padding:16px}
    .book-info h3{font-size:16px;margin-bottom:4px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
    .book-info p{font-size:12px;color:var(--muted);margin-bottom:11px}
    .book-meta{display:flex;justify-content:space-between;align-items:center;font-size:12px;color:var(--muted)}
    .rating{color:var(--gold);font-weight:800}
    .popular{background:#fff}
    .popular-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
    .popular-card{display:flex;gap:17px;padding:16px;border:1px solid var(--line);border-radius:14px;background:#fff;transition:.25s}
    .popular-card:hover{border-color:var(--rose);box-shadow:var(--shadow-sm)}
    .popular-card img{width:104px;height:132px;border-radius:9px;flex:none}
    .popular-card h3{font-size:17px;line-height:1.45;margin:7px 0}
    .popular-card p{font-size:12px;color:var(--muted);line-height:1.7}
    .topic-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:15px}
    .topic{padding:24px 19px;min-height:160px;background:#fff;border:1px solid var(--line);border-radius:12px;transition:.25s}
    .topic:hover{background:var(--wine);color:#fff;transform:translateY(-4px)}
    .topic h3{font-size:18px;margin-bottom:9px}
    .topic p{font-size:13px;color:var(--muted);line-height:1.75}
    .topic:hover p{color:rgba(255,255,255,.75)}
    .ranking-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:35px}
    .rank-list{list-style:none;background:#fff;border:1px solid var(--line);border-radius:14px;overflow:hidden}
    .rank-item{display:grid;grid-template-columns:42px 1fr 72px 55px;align-items:center;gap:12px;padding:14px 18px;border-bottom:1px solid var(--line)}
    .rank-item:last-child{border-bottom:0}
    .rank-no{font:700 20px Georgia,serif;color:#aaa}
    .rank-item:nth-child(-n+3) .rank-no{color:var(--wine)}
    .rank-name{font-weight:700;font-size:14px}
    .rank-cat{font-size:11px;color:var(--muted);display:block}
    .hot{font-size:12px;color:var(--rose)}
    .rank-score{font-weight:800;color:var(--gold);font-size:13px}
    .rank-aside{background:var(--wine);color:#fff;padding:35px;border-radius:14px;display:flex;flex-direction:column;justify-content:center}
    .rank-aside h3{font-size:28px;line-height:1.35;margin:13px 0}
    .rank-aside p{color:rgba(255,255,255,.76);line-height:1.9}
    .rank-aside .btn{align-self:flex-start;margin-top:25px}
    .news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
    .news-card{background:#fff;border:1px solid var(--line);border-radius:14px;overflow:hidden}
    .news-card img{height:150px}
    .news-body{padding:18px}
    .news-date{font-size:12px;color:var(--gold);font-weight:700}
    .news-body h3{font-size:17px;line-height:1.5;margin:8px 0}
    .news-body p{font-size:13px;color:var(--muted);line-height:1.75}
    .trust{background:#f4ece8}
    .trust-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
    .trust-item{text-align:center;padding:27px 18px;background:#fff;border-radius:12px;border:1px solid var(--line)}
    .trust-item strong{font-size:29px;color:var(--wine);display:block}
    .trust-item span{color:var(--muted);font-size:13px}
    .faq-grid{display:grid;grid-template-columns:1fr 1fr;gap:15px}
    .faq-item{border:1px solid var(--line);border-radius:12px;background:#fff;padding:22px 24px}
    .faq-item h3{font-size:16px;margin-bottom:9px;color:var(--wine)}
    .faq-item p{color:var(--muted);font-size:14px;line-height:1.9}
    .closing{background:var(--wine);color:#fff;text-align:center;padding:72px 20px}
    .closing h2{font-size:clamp(27px,4vw,44px);margin-bottom:13px}
    .closing p{max-width:650px;margin:auto;color:rgba(255,255,255,.75)}
    .closing .btn{margin-top:26px}
    footer{background:#241b20;color:#fff;padding:58px 0 24px}
    .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:35px;padding-bottom:42px;border-bottom:1px solid rgba(255,255,255,.13)}
    .footer-brand p{color:rgba(255,255,255,.58);font-size:13px;line-height:1.9;max-width:290px;margin-top:14px}
    footer h3{font-size:14px;margin-bottom:15px;color:#f0c27f}
    footer ul{list-style:none;color:rgba(255,255,255,.58);font-size:13px;line-height:2.25}
    footer li a:hover{color:#fff}
    .copyright{display:flex;justify-content:space-between;gap:20px;padding-top:22px;color:rgba(255,255,255,.4);font-size:12px}
    @media(max-width:1024px){
      .nav-list{gap:15px}.header-action{display:none}
      .catalog-grid{grid-template-columns:repeat(3,1fr)}
      .topic-grid{grid-template-columns:repeat(3,1fr)}
      .play-button{right:6%}
    }
    @media(max-width:768px){
      .container{width:min(var(--container),calc(100% - 32px))}
      .site-header{height:68px}.menu-toggle{display:block}.nav-list{display:none;position:absolute;top:68px;left:0;right:0;background:#fff;border-bottom:1px solid var(--line);padding:12px 20px;flex-direction:column;align-items:flex-start;gap:0;box-shadow:var(--shadow-sm)}
      .nav-list.open{display:flex}.nav-list a{display:block;padding:11px 0;width:100%}
      .hero{min-height:650px}.hero-content{padding:75px 0}.hero h1{font-size:42px}
      .hero-lead{font-size:15px}.play-button{width:62px;height:62px;right:22px;bottom:30px}
      .signal-grid{grid-template-columns:repeat(2,1fr);gap:17px}.signal{border-left:0;padding-left:0}
      .section{padding:66px 0}.section-head{display:block}.section-head p{margin-top:13px}
      .statement-grid,.demo-grid,.result-grid,.ranking-grid{grid-template-columns:1fr;gap:30px}
      .feature-grid,.popular-grid{grid-template-columns:1fr}
      .catalog-grid{grid-template-columns:repeat(2,1fr);gap:15px}
      .topic-grid{grid-template-columns:repeat(2,1fr)}
      .news-grid{grid-template-columns:repeat(2,1fr)}
      .trust-grid{grid-template-columns:repeat(2,1fr)}
      .footer-grid{grid-template-columns:1fr 1fr}
      .footer-brand{grid-column:1/-1}
    }
    @media(max-width:520px){
      .brand-name{font-size:14px}.brand-mark{width:34px;height:34px}
      .hero h1{font-size:35px}.hero-note{gap:16px;flex-wrap:wrap}
      .hero-actions .btn{width:100%}
      .catalog-grid,.news-grid,.topic-grid,.faq-grid{grid-template-columns:1fr}
      .book-cover{height:270px}
      .rank-item{grid-template-columns:31px 1fr 45px 42px;padding:13px 12px;gap:7px}
      .rank-name{font-size:13px}.rank-cat{font-size:10px}
      .footer-grid{grid-template-columns:1fr 1fr;gap:25px 15px}
      .copyright{display:block;line-height:2}
      .copyright span{display:block}
    }