/* roulang page: index */
:root{
      --blue:#4f70cf;
      --blue-dark:#3455b0;
      --blue-soft:#edf3ff;
      --ink:#1e2b49;
      --muted:#71809c;
      --line:#dfe7f5;
      --paper:#ffffff;
      --bg:#f7f9fd;
      --mint:#dff4ee;
      --orange:#f4a477;
      --shadow:0 18px 50px rgba(65,88,145,.11);
      --shadow-sm:0 8px 24px rgba(65,88,145,.08);
      --radius:22px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;line-height:1.7}
    a{text-decoration:none;color:inherit}
    button,input{font:inherit}
    button{cursor:pointer}
    img{display:block;max-width:100%}
    .container{width:min(1180px,calc(100% - 40px));margin:0 auto}
    .site-header{position:absolute;z-index:20;top:20px;left:0;width:100%}
    .nav-shell{display:flex;align-items:center;gap:22px;padding:13px 16px 13px 20px;border:1px solid rgba(255,255,255,.72);background:rgba(255,255,255,.72);backdrop-filter:blur(18px);border-radius:18px;box-shadow:var(--shadow-sm);transition:.25s}
    .site-header.scrolled{position:fixed;top:0;padding:10px 0;background:rgba(247,249,253,.82);backdrop-filter:blur(14px)}
    .site-header.scrolled .nav-shell{background:rgba(255,255,255,.95);border-color:var(--line)}
    .brand{display:flex;align-items:center;gap:10px;min-width:240px;font-weight:800;letter-spacing:-.02em}
    .brand-mark{display:grid;place-items:center;width:34px;height:34px;border-radius:11px;background:var(--blue);color:#fff;font-size:14px;box-shadow:0 6px 14px rgba(79,112,207,.28)}
    .brand-text{font-size:16px}
    .nav-links{display:flex;align-items:center;gap:4px;flex:1}
    .nav-links a{padding:9px 12px;color:#5f6d88;font-size:14px;border-radius:10px;transition:.2s}
    .nav-links a:hover,.nav-links a.active{color:var(--blue-dark);background:var(--blue-soft)}
    .nav-actions{display:flex;align-items:center;gap:9px}
    .search-link{display:flex;align-items:center;gap:7px;padding:9px 11px;color:#667590;font-size:13px}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid transparent;border-radius:12px;padding:11px 18px;font-size:14px;font-weight:700;transition:.2s}
    .btn-primary{background:var(--blue);color:#fff;box-shadow:0 9px 18px rgba(79,112,207,.2)}
    .btn-primary:hover{background:var(--blue-dark);transform:translateY(-2px);box-shadow:0 13px 22px rgba(79,112,207,.27)}
    .btn-primary:active{transform:translateY(0)}
    .btn-secondary{background:#fff;color:var(--blue-dark);border-color:var(--line)}
    .btn-secondary:hover{background:var(--blue-soft);border-color:#bdcdf4}
    .btn:focus-visible,.nav-links a:focus-visible,.search-link:focus-visible,summary:focus-visible{outline:3px solid rgba(79,112,207,.3);outline-offset:3px}
    .menu-btn{display:none;border:0;background:transparent;color:var(--ink);font-size:22px}
    .hero{position:relative;overflow:hidden;padding:168px 0 92px;background:linear-gradient(135deg,#edf4ff 0%,#f8fbff 62%,#eef1ff 100%)}
    .hero:before{content:"";position:absolute;inset:0;opacity:.38;background-image:linear-gradient(rgba(79,112,207,.08) 1px,transparent 1px),linear-gradient(90deg,rgba(79,112,207,.08) 1px,transparent 1px);background-size:48px 48px;mask-image:linear-gradient(to bottom,#000,transparent 88%)}
    .orb{position:absolute;border-radius:50%;filter:blur(2px);opacity:.55}
    .orb.one{width:240px;height:240px;background:#dbe7ff;right:4%;top:110px}
    .orb.two{width:150px;height:150px;background:#e5dafc;left:8%;bottom:50px}
    .hero-grid{position:relative;display:grid;grid-template-columns:1.03fr .97fr;gap:70px;align-items:center}
    .eyebrow,.section-kicker{display:inline-flex;align-items:center;gap:8px;color:var(--blue-dark);font-size:13px;font-weight:800;letter-spacing:.08em}
    .eyebrow:before,.section-kicker:before{content:"";width:20px;height:2px;background:var(--orange);border-radius:2px}
    h1{margin:18px 0 20px;font-size:clamp(40px,5vw,64px);line-height:1.14;letter-spacing:-.065em;font-weight:850;max-width:650px}
    .hero-copy{max-width:590px;color:#61708d;font-size:17px}
    .hero-buttons{display:flex;gap:12px;flex-wrap:wrap;margin-top:30px}
    .hero-notes{display:flex;gap:24px;margin-top:30px;color:#6c7890;font-size:13px}
    .hero-notes strong{display:block;color:var(--ink);font-size:20px;line-height:1.2}
    .preview-board{position:relative;padding:20px;background:rgba(255,255,255,.72);border:1px solid rgba(255,255,255,.9);border-radius:28px;box-shadow:var(--shadow)}
    .preview-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:18px;color:var(--muted);font-size:12px}
    .dots{display:flex;gap:5px}.dots i{width:7px;height:7px;border-radius:50%;background:#c9d5ef}.dots i:first-child{background:var(--orange)}
    .preview-search{display:flex;align-items:center;gap:10px;padding:13px 15px;background:#fff;border:1px solid var(--line);border-radius:13px;color:#99a6bd;font-size:13px}
    .tag-row{display:flex;flex-wrap:wrap;gap:8px;margin:15px 0}
    .tag{display:inline-flex;padding:5px 9px;border-radius:8px;background:var(--blue-soft);color:var(--blue-dark);font-size:11px;font-weight:700}
    .tag.mint{background:var(--mint);color:#267965}.tag.warm{background:#fff0e8;color:#ae633b}
    .preview-list{display:grid;grid-template-columns:1.15fr .85fr;gap:12px}
    .cover{position:relative;min-height:188px;overflow:hidden;border-radius:16px;background:linear-gradient(145deg,#9eb8f4,#e4e9ff 52%,#d6c9f0)}
    .cover:after{content:"索引预览";position:absolute;right:12px;bottom:12px;padding:5px 8px;background:rgba(255,255,255,.68);border-radius:7px;color:#52679d;font-size:11px}
    .mini-stack{display:grid;gap:12px}.mini-card{padding:14px;background:#fff;border:1px solid var(--line);border-radius:15px}
    .mini-card b{display:block;font-size:13px;margin:10px 0 4px}.mini-card small{color:var(--muted);font-size:11px}
    section{padding:102px 0}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:30px;margin-bottom:32px}
    .section-head h2{margin:12px 0 0;font-size:36px;line-height:1.25;letter-spacing:-.045em}
    .section-head p{max-width:490px;margin:0;color:var(--muted);font-size:15px}
    .feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .feature-card,.panel,.feedback-card,.faq-item{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-sm)}
    .feature-card{position:relative;padding:26px;transition:.25s}
    .feature-card:hover,.feedback-card:hover,.content-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
    .index-no{color:#9aabd0;font-size:12px;font-weight:800;letter-spacing:.12em}
    .feature-icon{display:grid;place-items:center;width:42px;height:42px;margin:20px 0 18px;border-radius:13px;background:var(--blue-soft);color:var(--blue-dark);font-weight:800}
    .feature-card h3{margin:0 0 8px;font-size:20px}.feature-card p{margin:0;color:var(--muted);font-size:14px}
    .demo{background:#f0f5ff}
    .demo-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:56px;align-items:center}
    .browser-panel{padding:18px;background:#fff;border:1px solid var(--line);border-radius:24px;box-shadow:var(--shadow)}
    .browser-bar{display:flex;gap:6px;padding-bottom:15px;border-bottom:1px solid var(--line)}.browser-bar i{width:8px;height:8px;border-radius:50%;background:#d5def1}.browser-bar i:first-child{background:#f0b293}
    .index-row{display:flex;gap:12px;padding:16px 0;border-bottom:1px solid #edf0f7}.index-thumb{width:67px;height:58px;border-radius:11px;background:linear-gradient(135deg,#cad9fb,#e7dcf8);flex:none}.index-row b{display:block;font-size:14px;margin-bottom:4px}.index-row small{color:var(--muted);font-size:11px}
    .steps{display:grid;gap:25px;margin-top:28px}.step{display:flex;gap:17px}.step-num{display:grid;place-items:center;flex:none;width:34px;height:34px;border:1px solid #b9caf2;border-radius:10px;color:var(--blue-dark);font-size:12px;font-weight:800;background:#fff}.step h3{margin:0 0 4px;font-size:17px}.step p{margin:0;color:var(--muted);font-size:14px}
    .content-layout{display:grid;grid-template-columns:1.25fr .75fr;gap:22px}.content-card{display:flex;gap:18px;padding:18px;background:#fff;border:1px solid var(--line);border-radius:18px;transition:.25s}.content-card+.content-card{margin-top:12px}.content-thumb{width:150px;min-height:104px;border-radius:14px;background:linear-gradient(135deg,#b7cafa,#e9dffa);flex:none}.content-card h3{margin:9px 0 6px;font-size:17px}.content-card p{margin:0;color:var(--muted);font-size:13px}.meta{display:flex;gap:8px;align-items:center;color:#8995aa;font-size:11px}.recommend{padding:26px;background:#fff;border:1px solid var(--line);border-radius:22px}.recommend h3{margin:0 0 18px;font-size:19px}.rank-item{display:flex;align-items:center;gap:12px;padding:14px 0;border-bottom:1px solid #edf0f7}.rank-item:last-child{border-bottom:0}.rank{color:var(--orange);font-weight:800}.rank-item b{font-size:13px}.rank-item small{display:block;color:var(--muted);font-size:11px}
    .trust-band{padding:32px 0;background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.trust-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}.trust-item{display:flex;gap:14px;align-items:flex-start}.trust-mark{color:var(--blue);font-size:21px}.trust-item b{display:block;font-size:15px}.trust-item span{display:block;color:var(--muted);font-size:13px}
    .faq-wrap{max-width:850px;margin:auto}.faq-item{margin-bottom:12px;overflow:hidden}.faq-item summary{display:flex;justify-content:space-between;align-items:center;min-height:64px;padding:17px 22px;cursor:pointer;font-weight:700;list-style:none}.faq-item summary::-webkit-details-marker{display:none}.faq-item summary span{color:var(--blue);font-size:20px;transition:.2s}.faq-item[open] summary span{transform:rotate(45deg)}.faq-answer{padding:0 22px 20px;color:var(--muted);font-size:14px}
    .cta{padding:58px 0}.cta-box{display:flex;align-items:center;justify-content:space-between;gap:30px;padding:42px 48px;background:linear-gradient(110deg,#e8f0ff,#f5f1ff);border:1px solid #d8e3fa;border-radius:28px}.cta-box h2{margin:10px 0;font-size:32px;letter-spacing:-.04em}.cta-box p{margin:0;color:var(--muted);font-size:14px}
    footer{padding:48px 0 105px;background:#edf2fa;border-top:1px solid var(--line)}.footer-grid{display:flex;justify-content:space-between;gap:40px}.footer-brand p{max-width:350px;margin:14px 0 0;color:var(--muted);font-size:13px}.footer-links{display:flex;gap:45px}.footer-links h4{margin:0 0 12px;font-size:14px}.footer-links a,.footer-links span{display:block;margin:7px 0;color:var(--muted);font-size:13px}.footer-bottom{display:flex;justify-content:space-between;gap:20px;margin-top:38px;padding-top:20px;border-top:1px solid #d8e0ee;color:#8793a8;font-size:12px}
    .fixed-cta{position:fixed;z-index:30;left:50%;bottom:18px;transform:translateX(-50%);width:min(780px,calc(100% - 32px));display:flex;align-items:center;justify-content:space-between;gap:18px;padding:11px 13px 11px 20px;background:rgba(255,255,255,.96);border:1px solid #d7e1f3;border-radius:16px;box-shadow:0 14px 40px rgba(47,68,119,.18);backdrop-filter:blur(12px)}.fixed-cta p{margin:0;font-size:13px;font-weight:700}.fixed-cta small{display:block;color:var(--muted);font-weight:400}.close-cta{border:0;background:transparent;color:#95a1b5;font-size:20px;padding:7px}.mobile-menu{display:none}
    @media(max-width:900px){.brand{min-width:auto}.nav-links{gap:0}.nav-links a{padding:8px}.hero-grid,.demo-grid{grid-template-columns:1fr;gap:38px}.hero{padding-top:145px}.content-layout{grid-template-columns:1fr}.section-head{display:block}.section-head p{margin-top:12px}.cta-box{display:block}.cta-box .btn{margin-top:22px}}
    @media(max-width:700px){.container{width:min(100% - 32px,560px)}.site-header{top:10px}.nav-shell{padding:11px 13px}.nav-links,.search-link{display:none}.nav-actions{margin-left:auto}.menu-btn{display:block}.brand-text{font-size:14px}.brand-mark{width:31px;height:31px}.mobile-menu{position:absolute;top:62px;left:0;right:0;padding:10px;background:#fff;border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow);display:none}.mobile-menu.open{display:block}.mobile-menu a{display:block;padding:12px 14px;border-radius:10px;color:#566783;font-size:14px}.hero{padding:126px 0 65px}h1{font-size:39px}.hero-copy{font-size:15px}.hero-notes{gap:15px}.feature-grid,.trust-grid{grid-template-columns:1fr}.feature-card{padding:22px}section{padding:70px 0}.section-head h2{font-size:29px}.preview-list{grid-template-columns:1fr}.cover{min-height:150px}.content-card{gap:12px}.content-thumb{width:92px;min-height:88px}.cta-box{padding:30px 24px}.cta-box h2{font-size:27px}.footer-grid,.footer-bottom{display:block}.footer-links{margin-top:28px;gap:28px}.footer-bottom span{display:block;margin-top:8px}.fixed-cta{bottom:10px;padding-left:14px}.fixed-cta p{font-size:12px}.fixed-cta small{font-size:11px}.fixed-cta .btn{padding:10px 13px;font-size:12px}}

/* roulang page: category2 */
:root{--blue:#4f70cf;--blue-dark:#3455b0;--blue-soft:#edf3ff;--ink:#1e2b49;--muted:#71809c;--line:#dfe7f5;--paper:#fff;--bg:#f7f9fd;--mint:#dff4ee;--orange:#f4a477;--shadow:0 18px 50px rgba(65,88,145,.11);--shadow-sm:0 8px 24px rgba(65,88,145,.08);--radius:22px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;line-height:1.7}a{text-decoration:none;color:inherit}button,input{font:inherit}button{cursor:pointer}img{display:block;max-width:100%}.container{width:min(1180px,calc(100% - 40px));margin:0 auto}
.site-header{position:absolute;z-index:20;top:20px;left:0;width:100%}.nav-shell{display:flex;align-items:center;gap:22px;padding:13px 16px 13px 20px;border:1px solid rgba(255,255,255,.72);background:rgba(255,255,255,.72);backdrop-filter:blur(18px);border-radius:18px;box-shadow:var(--shadow-sm);transition:.25s}.site-header.scrolled{position:fixed;top:0;padding:10px 0;background:rgba(247,249,253,.88);backdrop-filter:blur(14px)}.site-header.scrolled .nav-shell{background:rgba(255,255,255,.95);border-color:var(--line)}
.brand{display:flex;align-items:center;gap:10px;min-width:240px;font-weight:800;letter-spacing:-.02em}.brand-mark{display:grid;place-items:center;width:34px;height:34px;border-radius:11px;background:var(--blue);color:#fff;font-size:14px;box-shadow:0 6px 14px rgba(79,112,207,.28)}.brand-text{font-size:16px}.nav-links{display:flex;align-items:center;gap:4px;flex:1}.nav-links a{padding:9px 12px;color:#5f6d88;font-size:14px;border-radius:10px;transition:.2s}.nav-links a:hover,.nav-links a.active{color:var(--blue-dark);background:var(--blue-soft)}.nav-actions{display:flex;align-items:center;gap:9px}.search-link{display:flex;align-items:center;gap:7px;padding:9px 11px;color:#667590;font-size:13px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid transparent;border-radius:12px;padding:11px 18px;font-size:14px;font-weight:700;transition:.2s}.btn-primary{background:var(--blue);color:#fff;box-shadow:0 9px 18px rgba(79,112,207,.2)}.btn-primary:hover{background:var(--blue-dark);transform:translateY(-2px);box-shadow:0 13px 22px rgba(79,112,207,.27)}.btn-primary:active{transform:translateY(0)}.btn-secondary{background:#fff;color:var(--blue-dark);border-color:var(--line)}.btn-secondary:hover{background:var(--blue-soft);border-color:#bdcdf4}.btn:focus-visible,.nav-links a:focus-visible,.search-link:focus-visible,summary:focus-visible,input:focus-visible{outline:3px solid rgba(79,112,207,.3);outline-offset:3px}.menu-btn{display:none;border:0;background:transparent;color:var(--ink);font-size:22px}
.page-hero{position:relative;overflow:hidden;padding:160px 0 78px;background:linear-gradient(135deg,#edf4ff 0%,#f8fbff 62%,#eef1ff 100%)}.page-hero:before{content:"";position:absolute;inset:0;opacity:.38;background-image:linear-gradient(rgba(79,112,207,.08) 1px,transparent 1px),linear-gradient(90deg,rgba(79,112,207,.08) 1px,transparent 1px);background-size:48px 48px;mask-image:linear-gradient(to bottom,#000,transparent 88%)}.page-hero-inner{position:relative;display:flex;align-items:end;justify-content:space-between;gap:40px}.crumbs{color:var(--muted);font-size:13px;margin-bottom:18px}.crumbs a:hover{color:var(--blue-dark)}h1{font-size:clamp(34px,5vw,56px);line-height:1.18;letter-spacing:-.05em;margin:0 0 18px}.hero-desc{max-width:650px;color:#61708d;font-size:17px;margin:0}.hero-badge{padding:22px;background:#fff;border:1px solid var(--line);border-radius:20px;box-shadow:var(--shadow-sm);min-width:230px}.hero-badge strong{display:block;color:var(--blue-dark);font-size:28px;line-height:1.2}.hero-badge span{color:var(--muted);font-size:13px}
main{padding:76px 0 120px}.section-head{display:flex;align-items:end;justify-content:space-between;gap:30px;margin-bottom:28px}.section-kicker{display:inline-flex;align-items:center;gap:8px;color:var(--blue-dark);font-size:13px;font-weight:800;letter-spacing:.08em}.section-kicker:before{content:"";width:20px;height:2px;background:var(--orange);border-radius:2px}.section-head h2{margin:10px 0 0;font-size:34px;line-height:1.25;letter-spacing:-.045em}.section-head p{max-width:480px;margin:0;color:var(--muted);font-size:15px}
.toolbar{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:15px 18px;background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow-sm);margin-bottom:26px}.filter-row{display:flex;gap:8px;flex-wrap:wrap}.filter{border:1px solid var(--line);background:#fff;color:#687895;border-radius:10px;padding:8px 13px;font-size:13px;transition:.2s}.filter:hover,.filter.active{background:var(--blue-soft);border-color:#bdcdf4;color:var(--blue-dark)}.search-box{display:flex;align-items:center;gap:9px;min-width:230px;padding:9px 12px;border:1px solid var(--line);border-radius:11px;background:#fbfcff;color:#94a0b7}.search-box input{width:100%;border:0;outline:0;background:transparent;color:var(--ink);font-size:13px}
.content-layout{display:grid;grid-template-columns:220px 1fr;gap:26px;align-items:start}.side-index{padding:22px;background:#fff;border:1px solid var(--line);border-radius:20px;box-shadow:var(--shadow-sm);position:sticky;top:96px}.side-index h3{font-size:16px;margin:0 0 16px}.side-index a{display:flex;justify-content:space-between;padding:10px 0;border-bottom:1px solid #edf0f7;color:var(--muted);font-size:13px}.side-index a:hover,.side-index a.active{color:var(--blue-dark)}.side-index em{font-style:normal;color:#a4afc2}.update-grid{display:grid;grid-template-columns:1.25fr .75fr;gap:16px}.update-card{background:#fff;border:1px solid var(--line);border-radius:20px;padding:20px;box-shadow:var(--shadow-sm);transition:.25s}.update-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}.cover{height:128px;border-radius:14px;background:linear-gradient(135deg,#dfeaff,#f1edff);position:relative;overflow:hidden;margin-bottom:16px}.cover:after{content:"索引预览";position:absolute;right:14px;bottom:12px;color:rgba(52,85,176,.35);font-size:12px;font-weight:800;letter-spacing:.12em}.cover.alt{background:linear-gradient(135deg,#e1f5f0,#eaf0ff)}.cover.warm{background:linear-gradient(135deg,#fff0e4,#e9efff)}.update-card h3{font-size:18px;line-height:1.4;margin:0 0 8px}.update-card p{font-size:13px;color:var(--muted);margin:0 0 13px}.meta{display:flex;align-items:center;gap:8px;color:#8995aa;font-size:11px}.tag{display:inline-flex;padding:5px 9px;border-radius:8px;background:var(--blue-soft);color:var(--blue-dark);font-size:11px;font-weight:700}.tag.mint{background:var(--mint);color:#267965}.tag.warm{background:#fff0e8;color:#ae633b}.card-foot{display:flex;align-items:center;justify-content:space-between;margin-top:16px}.text-link{font-size:13px;color:var(--blue-dark);font-weight:700}.text-link:hover{text-decoration:underline}
.timeline{margin-top:72px;padding:28px;background:#fff;border:1px solid var(--line);border-radius:22px;box-shadow:var(--shadow-sm)}.timeline-list{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.time-item{padding:18px;border-left:3px solid #cbd9fb;background:#fbfcff;border-radius:0 14px 14px 0}.time-item strong{display:block;color:var(--blue-dark);font-size:13px;margin-bottom:6px}.time-item b{display:block;font-size:16px;margin-bottom:5px}.time-item span{color:var(--muted);font-size:13px}
.tag-index{display:flex;gap:10px;flex-wrap:wrap;margin-top:20px}.tag-index .tag{padding:9px 13px}.faq-wrap{max-width:820px;margin:76px auto 0}.faq-item{margin-bottom:12px;overflow:hidden}.faq-item summary{list-style:none;display:flex;align-items:center;justify-content:space-between;gap:20px;padding:19px 22px;font-weight:700;cursor:pointer}.faq-item summary::-webkit-details-marker{display:none}.faq-item summary span{color:var(--blue);font-size:20px}.faq-answer{padding:0 22px 20px;color:var(--muted);font-size:14px}.cta{margin-top:76px;padding:38px 44px;background:var(--blue-soft);border:1px solid #d6e1fb;border-radius:24px;display:flex;align-items:center;justify-content:space-between;gap:25px}.cta h2{margin:0 0 8px;font-size:28px}.cta p{margin:0;color:var(--muted);font-size:14px}
footer{background:#eef3fb;padding:54px 0 24px}.footer-grid{display:flex;justify-content:space-between;gap:50px}.footer-brand{max-width:390px}.footer-brand p{color:var(--muted);font-size:13px;margin:18px 0 0}.footer-links{display:flex;gap:74px}.footer-links h4{margin:0 0 13px;font-size:14px}.footer-links a,.footer-links span{display:block;color:var(--muted);font-size:13px;margin:7px 0}.footer-links a:hover{color:var(--blue-dark)}.footer-bottom{display:flex;justify-content:space-between;gap:20px;border-top:1px solid var(--line);margin-top:38px;padding-top:18px;color:#8995aa;font-size:12px}
@media(max-width:900px){.brand{min-width:0}.nav-links{gap:0}.nav-links a{padding:8px}.content-layout{grid-template-columns:1fr}.side-index{position:static}.update-grid{grid-template-columns:1fr 1fr}.timeline-list{grid-template-columns:1fr}.page-hero-inner{align-items:start;flex-direction:column}.hero-badge{min-width:0}}
@media(max-width:680px){.container{width:min(100% - 32px,560px)}.site-header{top:12px}.nav-shell{padding:11px 13px}.nav-links,.search-link{display:none}.nav-actions{margin-left:auto}.menu-btn{display:block}.site-header.menu-open .nav-links{display:flex;position:absolute;top:66px;left:0;right:0;flex-direction:column;align-items:stretch;padding:10px;background:#fff;border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow)}.site-header.menu-open .nav-links a{padding:12px}.page-hero{padding:132px 0 60px}.hero-desc{font-size:15px}.hero-badge{width:100%}main{padding:56px 0 88px}.section-head{display:block}.section-head h2{font-size:29px}.section-head p{margin-top:12px}.toolbar{display:block}.search-box{margin-top:12px;min-width:0}.filter-row{overflow:auto;flex-wrap:nowrap;padding-bottom:3px}.filter{white-space:nowrap}.update-grid{grid-template-columns:1fr}.cta{display:block;padding:28px 24px}.cta .btn{margin-top:20px}.footer-grid,.footer-links,.footer-bottom{display:block}.footer-links{margin-top:28px}.footer-links>div{margin-top:22px}.footer-bottom span{display:block;margin-top:8px}}

/* roulang page: category1 */
:root{
      --blue:#4f70cf;
      --blue-dark:#3455b0;
      --blue-soft:#edf3ff;
      --ink:#1e2b49;
      --muted:#71809c;
      --line:#dfe7f5;
      --paper:#fff;
      --bg:#f7f9fd;
      --mint:#dff4ee;
      --orange:#f4a477;
      --shadow:0 18px 50px rgba(65,88,145,.11);
      --shadow-sm:0 8px 24px rgba(65,88,145,.08);
      --radius:22px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;line-height:1.7}
    a{text-decoration:none;color:inherit}
    button,input{font:inherit}
    button{cursor:pointer}
    img{display:block;max-width:100%}
    .container{width:min(1180px,calc(100% - 40px));margin:0 auto}
    .site-header{position:absolute;z-index:20;top:20px;left:0;width:100%}
    .nav-shell{display:flex;align-items:center;gap:22px;padding:13px 16px 13px 20px;border:1px solid rgba(255,255,255,.72);background:rgba(255,255,255,.72);backdrop-filter:blur(18px);border-radius:18px;box-shadow:var(--shadow-sm);transition:.25s}
    .site-header.scrolled{position:fixed;top:0;padding:10px 0;background:rgba(247,249,253,.86);backdrop-filter:blur(14px)}
    .site-header.scrolled .nav-shell{background:rgba(255,255,255,.95);border-color:var(--line)}
    .brand{display:flex;align-items:center;gap:10px;min-width:240px;font-weight:800;letter-spacing:-.02em}
    .brand-mark{display:grid;place-items:center;width:34px;height:34px;border-radius:11px;background:var(--blue);color:#fff;font-size:14px;box-shadow:0 6px 14px rgba(79,112,207,.28)}
    .brand-text{font-size:16px}
    .nav-links{display:flex;align-items:center;gap:4px;flex:1}
    .nav-links a{padding:9px 12px;color:#5f6d88;font-size:14px;border-radius:10px;transition:.2s}
    .nav-links a:hover,.nav-links a.active{color:var(--blue-dark);background:var(--blue-soft)}
    .nav-actions{display:flex;align-items:center;gap:9px}
    .search-link{display:flex;align-items:center;gap:7px;padding:9px 11px;color:#667590;font-size:13px}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid transparent;border-radius:12px;padding:11px 18px;font-size:14px;font-weight:700;transition:.2s}
    .btn-primary{background:var(--blue);color:#fff;box-shadow:0 9px 18px rgba(79,112,207,.2)}
    .btn-primary:hover{background:var(--blue-dark);transform:translateY(-2px);box-shadow:0 13px 22px rgba(79,112,207,.27)}
    .btn-primary:active{transform:translateY(0)}
    .btn-secondary{background:#fff;color:var(--blue-dark);border-color:var(--line)}
    .btn-secondary:hover{background:var(--blue-soft);border-color:#bdcdf4}
    .btn:focus-visible,.nav-links a:focus-visible,.search-link:focus-visible,summary:focus-visible,input:focus-visible{outline:3px solid rgba(79,112,207,.3);outline-offset:3px}
    .menu-btn{display:none;border:0;background:transparent;color:var(--ink);font-size:22px}
    .page-hero{padding:160px 0 70px;background:linear-gradient(135deg,#edf4ff,#f9fbff 65%,#eef1ff);position:relative;overflow:hidden}
    .page-hero:before{content:"";position:absolute;inset:0;opacity:.38;background-image:linear-gradient(rgba(79,112,207,.08) 1px,transparent 1px),linear-gradient(90deg,rgba(79,112,207,.08) 1px,transparent 1px);background-size:48px 48px}
    .hero-inner{position:relative;display:flex;justify-content:space-between;align-items:end;gap:40px}
    .eyebrow,.section-kicker{display:inline-flex;align-items:center;gap:8px;color:var(--blue-dark);font-size:13px;font-weight:800;letter-spacing:.08em}
    .eyebrow:before,.section-kicker:before{content:"";width:20px;height:2px;background:var(--orange);border-radius:2px}
    .page-hero h1{font-size:clamp(34px,5vw,56px);line-height:1.18;letter-spacing:-.055em;margin:16px 0 18px;max-width:720px}
    .page-hero p{color:var(--muted);font-size:16px;max-width:680px;margin:0}
    .crumbs{color:#8995aa;font-size:13px;margin-bottom:18px}
    .crumbs a:hover{color:var(--blue-dark)}
    .hero-index{min-width:210px;padding:20px;background:rgba(255,255,255,.72);border:1px solid rgba(255,255,255,.9);border-radius:20px;box-shadow:var(--shadow-sm)}
    .hero-index strong{display:block;color:var(--blue-dark);font-size:30px;line-height:1.1}
    .hero-index span{display:block;color:var(--muted);font-size:13px;margin-top:7px}
    main{padding:72px 0 120px}
    .toolbar{display:flex;align-items:center;justify-content:space-between;gap:18px;margin-bottom:28px}
    .search-box{display:flex;align-items:center;gap:10px;width:min(450px,100%);padding:12px 15px;background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow-sm);color:#8d9ab0}
    .search-box input{width:100%;border:0;outline:0;color:var(--ink);background:transparent;font-size:14px}
    .filter-button{padding:11px 15px;border:1px solid var(--line);border-radius:12px;background:#fff;color:var(--blue-dark);font-weight:700;transition:.2s}
    .filter-button:hover,.filter-button.active{background:var(--blue-soft);border-color:#bbcbf4}
    .browse-layout{display:grid;grid-template-columns:220px 1fr;gap:30px;align-items:start}
    .side-index{position:sticky;top:95px;padding:22px;background:#fff;border:1px solid var(--line);border-radius:20px;box-shadow:var(--shadow-sm)}
    .side-index h3{font-size:16px;margin:0 0 16px}
    .side-index a{display:flex;justify-content:space-between;padding:10px 0;border-bottom:1px solid #edf0f7;color:var(--muted);font-size:13px;transition:.2s}
    .side-index a:last-child{border-bottom:0}
    .side-index a:hover,.side-index a.active{color:var(--blue-dark);padding-left:5px}
    .side-index em{font-style:normal;color:#a5b0c3}
    .tag-panel{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:22px}
    .tag{display:inline-flex;padding:6px 10px;border-radius:9px;background:var(--blue-soft);color:var(--blue-dark);font-size:12px;font-weight:700;transition:.2s}
    .tag:hover,.tag.selected{background:var(--blue);color:#fff}
    .tag.mint{background:var(--mint);color:#267965}
    .tag.warm{background:#fff0e8;color:#ae633b}
    .content-grid{display:grid;grid-template-columns:1.18fr .82fr;gap:16px}
    .content-card{display:flex;gap:17px;padding:18px;background:#fff;border:1px solid var(--line);border-radius:18px;transition:.25s;min-height:150px}
    .content-card:first-child{grid-row:span 2;display:block;padding:22px}
    .content-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#c7d4f3}
    .thumb{flex:0 0 105px;height:112px;border-radius:14px;background:linear-gradient(135deg,#dbe8ff,#f3efff 55%,#dff4ee);position:relative;overflow:hidden;border:1px solid #d5e0f5}
    .content-card:first-child .thumb{height:210px;width:100%;margin-bottom:20px}
    .thumb:before{content:"索引图";position:absolute;right:10px;bottom:9px;color:rgba(52,85,176,.55);font-size:11px;font-weight:800;letter-spacing:.08em}
    .thumb:after{content:"";position:absolute;width:75px;height:75px;border:1px solid rgba(79,112,207,.18);border-radius:50%;top:20px;left:24px}
    .card-body{min-width:0}
    .card-body h3{margin:9px 0 6px;font-size:17px;line-height:1.45}
    .content-card:first-child h3{font-size:22px}
    .card-body p{margin:0;color:var(--muted);font-size:13px;line-height:1.7}
    .meta{display:flex;flex-wrap:wrap;gap:8px;align-items:center;color:#8995aa;font-size:11px}
    .card-link{display:inline-flex;margin-top:13px;color:var(--blue-dark);font-size:13px;font-weight:800}
    .card-link:hover{text-decoration:underline}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:30px;margin-bottom:25px}
    .section-head h2{margin:10px 0 0;font-size:32px;line-height:1.25;letter-spacing:-.045em}
    .section-head p{max-width:490px;margin:0;color:var(--muted);font-size:15px}
    .update-strip{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:68px}
    .update-item{padding:20px 22px;background:#fff;border:1px solid var(--line);border-radius:17px;box-shadow:var(--shadow-sm)}
    .update-item b{display:block;font-size:20px;color:var(--blue-dark);margin-bottom:5px}
    .update-item span{color:var(--muted);font-size:13px}
    .faq-section{padding:92px 0;background:#eef4ff}
    .faq-wrap{max-width:820px}
    .faq-item{margin-top:12px;padding:0 22px;background:#fff}
    .faq-item summary{list-style:none;cursor:pointer;padding:20px 0;font-weight:800;font-size:15px;display:flex;justify-content:space-between;gap:18px}
    .faq-item summary::-webkit-details-marker{display:none}
    .faq-item summary:after{content:"＋";color:var(--blue);font-size:20px;line-height:1}
    .faq-item[open] summary:after{content:"−"}
    .faq-answer{padding:0 34px 20px 0;color:var(--muted);font-size:14px}
    .cta{padding:70px 0}
    .cta-box{display:flex;align-items:center;justify-content:space-between;gap:25px;padding:34px 38px;background:var(--blue);border-radius:24px;color:#fff;box-shadow:var(--shadow)}
    .cta-box h2{margin:0 0 8px;font-size:28px;line-height:1.3}
    .cta-box p{margin:0;color:#dce6ff;font-size:14px}
    .cta-box .btn-primary{background:#fff;color:var(--blue-dark)}
    footer{padding:55px 0 30px;background:#eaf1fc;border-top:1px solid var(--line)}
    .footer-grid{display:flex;justify-content:space-between;gap:50px}
    .footer-brand{max-width:380px}
    .footer-brand .brand{min-width:0}
    .footer-brand p{color:var(--muted);font-size:13px;margin:17px 0 0}
    .footer-links{display:flex;gap:75px}
    .footer-links h4{font-size:14px;margin:0 0 14px}
    .footer-links div{display:flex;flex-direction:column;gap:8px;color:var(--muted);font-size:13px}
    .footer-links a:hover{color:var(--blue-dark)}
    .footer-bottom{display:flex;justify-content:space-between;gap:20px;border-top:1px solid #d8e2f2;margin-top:42px;padding-top:20px;color:#8995aa;font-size:12px}
    .mobile-menu{display:none}
    @media(max-width:900px){
      .brand{min-width:0}.nav-links{gap:0}.nav-links a{padding:8px}
      .browse-layout{grid-template-columns:1fr}.side-index{position:static;display:flex;gap:14px;overflow:auto;padding:14px}.side-index h3{display:none}.side-index a{white-space:nowrap;border:0;padding:7px 10px;background:var(--blue-soft);border-radius:8px}
      .content-grid{grid-template-columns:1fr 1fr}
      .content-card:first-child{grid-column:span 2;grid-row:auto;display:flex;padding:18px}
      .content-card:first-child .thumb{width:180px;height:150px;margin:0}
    }
    @media(max-width:680px){
      .container{width:min(100% - 32px,1180px)}
      .site-header{top:10px}.nav-shell{padding:10px 12px}.brand-text{font-size:13px}.brand-mark{width:31px;height:31px}
      .nav-links,.search-link{display:none}.nav-actions{margin-left:auto}.menu-btn{display:block}
      .site-header.menu-open .mobile-menu{display:flex;position:absolute;top:62px;left:0;right:0;padding:12px;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow)}
      .mobile-menu a{padding:12px;border-radius:10px;color:var(--muted)}.mobile-menu a:hover{background:var(--blue-soft);color:var(--blue-dark)}
      .page-hero{padding:125px 0 55px}.hero-inner{display:block}.hero-index{margin-top:28px;display:inline-block}
      main{padding:48px 0 90px}.toolbar{display:block}.search-box{width:100%;margin-bottom:12px}
      .content-grid{grid-template-columns:1fr}.content-card:first-child{grid-column:auto;display:block}.content-card:first-child .thumb{width:100%;height:180px;margin-bottom:17px}
      .update-strip{grid-template-columns:1fr;margin-top:48px}.section-head{display:block}.section-head p{margin-top:12px}.section-head h2{font-size:28px}
      .cta{padding:55px 0}.cta-box{display:block;padding:28px 24px}.cta-box .btn{margin-top:20px;width:100%}
      .footer-grid,.footer-bottom{display:block}.footer-links{margin-top:30px;gap:35px}.footer-bottom span{display:block;margin-top:8px}
    }