/* roulang page: index */
:root{
      --blue:#315b9a;
      --blue-dark:#244879;
      --blue-soft:#eaf1fb;
      --coral:#d9825b;
      --coral-soft:#fff0e9;
      --warm:#f7f8fa;
      --ink:#1f2937;
      --muted:#64748b;
      --line:#dce3ed;
      --white:#fff;
      --radius:18px;
      --shadow:0 14px 38px rgba(49,91,154,.09);
      --shadow-hover:0 20px 48px rgba(49,91,154,.16);
    }
    *{box-sizing:border-box;margin:0;padding:0}
    html{scroll-behavior:smooth}
    body{font-family:system-ui,-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;background:var(--warm);color:var(--ink);line-height:1.75;font-size:16px}
    a{text-decoration:none;color:inherit}
    img{display:block;max-width:100%}
    button,input,select,textarea{font:inherit}
    button{cursor:pointer;border:0}
    :focus-visible{outline:3px solid rgba(217,130,91,.55);outline-offset:3px}
    .container{width:min(1180px,calc(100% - 40px));margin-inline:auto}
    .site-header{position:sticky;top:0;z-index:30;background:rgba(255,255,255,.94);backdrop-filter:blur(12px);border-bottom:1px solid var(--line);transition:box-shadow .25s}
    .site-header.scrolled{box-shadow:0 8px 26px rgba(31,41,55,.08)}
    .nav-wrap{height:76px;display:flex;align-items:center;gap:30px}
    .brand{display:flex;align-items:center;gap:11px;font-weight:800;color:var(--blue);white-space:nowrap}
    .brand-mark{width:37px;height:37px;border-radius:12px;background:var(--blue);color:#fff;display:grid;place-items:center;font-size:14px;box-shadow:5px 5px 0 var(--coral)}
    .brand-name{font-size:19px;letter-spacing:.02em}
    .nav-links{display:flex;align-items:center;gap:26px;margin-left:auto}
    .nav-link{height:76px;display:flex;align-items:center;color:#516174;font-size:14px;position:relative;transition:color .2s}
    .nav-link:hover{color:var(--blue)}
    .nav-link.active{color:var(--blue);font-weight:700}
    .nav-link.active:after{content:"";position:absolute;bottom:0;left:0;right:0;height:3px;border-radius:3px 3px 0 0;background:var(--coral)}
    .nav-actions{display:flex;gap:10px;margin-left:4px}
    .btn{min-height:46px;padding:0 19px;border-radius:11px;display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:700;font-size:14px;transition:transform .2s,box-shadow .2s,background .2s,border-color .2s}
    .btn:hover{transform:translateY(-2px)}
    .btn:active{transform:translateY(0)}
    .btn-primary{background:var(--blue);color:#fff;box-shadow:0 8px 18px rgba(49,91,154,.2)}
    .btn-primary:hover{background:var(--blue-dark);box-shadow:0 12px 24px rgba(49,91,154,.26)}
    .btn-secondary{background:#fff;border:1px solid #b9c8dc;color:var(--blue)}
    .btn-secondary:hover{background:var(--blue-soft);border-color:var(--blue)}
    .menu-button{display:none;background:#fff;color:var(--blue);border:1px solid var(--line);width:44px;height:44px;border-radius:10px}
    .mobile-menu{display:none;padding:10px 0 20px;border-top:1px solid var(--line)}
    .mobile-menu a{display:block;padding:12px 0;color:var(--muted);font-weight:600}
    .hero{padding:88px 0 66px;background:#fff;position:relative;overflow:hidden}
    .hero:before{content:"";position:absolute;width:390px;height:390px;border-radius:50%;background:var(--blue-soft);right:-120px;top:-170px;opacity:.8}
    .hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:70px;align-items:center;position:relative}
    .eyebrow,.section-kicker{color:var(--coral);font-size:13px;font-weight:800;letter-spacing:.14em;text-transform:uppercase}
    .hero h1{font-size:clamp(38px,5vw,62px);line-height:1.18;letter-spacing:-.045em;margin:15px 0 22px;color:var(--ink)}
    .hero h1 em{font-style:normal;color:var(--blue)}
    .hero-copy{font-size:17px;color:var(--muted);max-width:640px}
    .hero-actions{display:flex;gap:12px;margin-top:30px;flex-wrap:wrap}
    .trust-line{display:flex;align-items:center;gap:18px;margin-top:25px;color:var(--muted);font-size:13px;flex-wrap:wrap}
    .trust-line span{display:inline-flex;align-items:center;gap:6px}
    .trust-dot{width:7px;height:7px;background:var(--coral);border-radius:50%}
    .visual-card{background:#fff;border:1px solid var(--line);border-radius:24px;padding:24px;box-shadow:var(--shadow);position:relative}
    .visual-top{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line);padding-bottom:17px}
    .visual-number{font-size:12px;color:var(--coral);font-weight:800;letter-spacing:.1em}
    .status{padding:5px 10px;border-radius:30px;background:var(--blue-soft);color:var(--blue);font-size:12px;font-weight:700}
    .visual-panel{margin-top:20px;min-height:280px;border-radius:15px;background:linear-gradient(135deg,#e9f0fa 0%,#cbd9ed 52%,#fbe5da 100%);position:relative;overflow:hidden;padding:25px;display:flex;align-items:end}
    .visual-panel:before,.visual-panel:after{content:"";position:absolute;border-radius:50%;background:rgba(49,91,154,.18)}
    .visual-panel:before{width:210px;height:210px;right:-30px;top:-35px}
    .visual-panel:after{width:135px;height:135px;left:55px;top:45px;background:rgba(255,255,255,.4)}
    .visual-caption{position:relative;z-index:1;background:rgba(255,255,255,.86);padding:16px 18px;border-radius:13px;width:100%}
    .visual-caption strong{display:block;font-size:20px;color:var(--blue)}
    .visual-caption small{color:var(--muted)}
    .visual-meta{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:18px}
    .meta-cell{padding:12px;background:var(--warm);border-radius:11px}
    .meta-cell b{display:block;font-size:15px;color:var(--blue)}
    .meta-cell span{font-size:12px;color:var(--muted)}
    .section{padding:88px 0}
    .section-head{display:flex;justify-content:space-between;gap:30px;align-items:end;margin-bottom:30px}
    .section-head h2{font-size:clamp(28px,3.5vw,40px);line-height:1.25;margin-top:9px;letter-spacing:-.03em}
    .section-head p{max-width:540px;color:var(--muted);font-size:15px}
    .stats{display:grid;grid-template-columns:repeat(4,1fr);gap:15px}
    .stat-card{background:#fff;border:1px solid var(--line);padding:23px;border-radius:var(--radius);box-shadow:0 7px 22px rgba(31,41,55,.035)}
    .stat-card small{color:var(--coral);font-weight:800}
    .stat-card strong{display:block;color:var(--blue);font-size:34px;line-height:1.2;margin:10px 0 4px}
    .stat-card span{color:var(--muted);font-size:13px}
    .matrix{display:grid;grid-template-columns:1.35fr .85fr;gap:18px}
    .matrix-side{display:grid;gap:18px}
    .content-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:25px;position:relative;overflow:hidden;transition:.25s;box-shadow:0 8px 25px rgba(31,41,55,.04)}
    .content-card:hover{border-color:#a8bfdc;box-shadow:var(--shadow-hover);transform:translateY(-4px)}
    .content-card.large{min-height:320px;display:flex;flex-direction:column;justify-content:end}
    .card-art{height:145px;border-radius:13px;margin-bottom:22px;background:linear-gradient(125deg,#dbe7f6,#f6d8ca);position:relative;overflow:hidden}
    .card-art:after{content:"";position:absolute;width:180px;height:180px;border-radius:50%;right:8%;top:-50px;background:rgba(49,91,154,.22)}
    .small .card-art{height:90px;margin-bottom:16px;background:linear-gradient(125deg,#eef3f9,#f8e6df)}
    .card-index{font-size:12px;color:var(--coral);font-weight:800;letter-spacing:.12em}
    .content-card h3{font-size:22px;margin:7px 0 8px;color:var(--ink)}
    .small h3{font-size:18px}
    .content-card p{font-size:14px;color:var(--muted)}
    .tags{display:flex;gap:7px;flex-wrap:wrap;margin-top:16px}
    .tag{padding:4px 9px;background:var(--blue-soft);border-radius:6px;color:var(--blue);font-size:12px}
    .tag.coral{background:var(--coral-soft);color:#a85434}
    .card-arrow{position:absolute;right:22px;top:22px;color:var(--blue);font-size:20px}
    .comparison{display:grid;grid-template-columns:1fr 1fr;gap:18px}
    .compare-box{padding:30px;border-radius:var(--radius);border:1px solid var(--line)}
    .compare-before{background:#f1f3f6}.compare-after{background:var(--blue-soft);border-color:#c7d8ed}
    .compare-box h3{font-size:20px;margin-bottom:18px}
    .compare-box ul{list-style:none;display:grid;gap:13px;color:var(--muted);font-size:14px}
    .compare-box li{display:flex;gap:10px;align-items:flex-start}
    .compare-box li:before{content:"";width:8px;height:8px;border-radius:50%;background:#9aa8ba;margin-top:9px;flex:none}
    .compare-after li:before{background:var(--coral)}
    .comparison-note{text-align:center;color:var(--muted);font-size:14px;margin-top:20px}
    .preview-section{background:#fff}
    .preview-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:16px}
    .preview-item{padding:22px;border:1px solid var(--line);border-radius:16px;background:var(--warm)}
    .preview-item.featured{background:var(--blue);color:#fff;min-height:190px}
    .preview-item.featured p,.preview-item.featured .preview-meta{color:#dbe7f6}
    .preview-item h3{font-size:19px;margin:12px 0 8px}
    .preview-item p{font-size:14px;color:var(--muted)}
    .preview-meta{font-size:12px;color:var(--muted);margin-top:18px}
    .faq-wrap{display:grid;grid-template-columns:.75fr 1.25fr;gap:70px;align-items:start}
    .faq-intro p{color:var(--muted);font-size:15px;margin-top:18px}
    .faq-list{display:grid;gap:10px}
    .faq-item{background:#fff;border:1px solid var(--line);border-radius:13px;overflow:hidden}
    .faq-question{width:100%;background:#fff;display:flex;justify-content:space-between;align-items:center;text-align:left;padding:19px 21px;color:var(--ink);font-weight:700}
    .faq-question:hover{background:var(--blue-soft);color:var(--blue)}
    .faq-icon{font-size:22px;color:var(--coral);transition:transform .2s}
    .faq-item.open .faq-icon{transform:rotate(45deg)}
    .faq-answer{display:none;padding:0 21px 20px;color:var(--muted);font-size:14px}
    .faq-item.open .faq-answer{display:block}
    .form-section{padding-top:20px}
    .form-card{background:var(--blue-soft);border:1px solid #cbdbee;border-radius:24px;padding:42px;display:grid;grid-template-columns:.8fr 1.2fr;gap:50px}
    .form-card h2{font-size:32px;line-height:1.3}
    .form-card .intro{color:var(--muted);font-size:14px;margin-top:14px}
    .form-fields{display:grid;grid-template-columns:1fr 1fr;gap:16px}
    .field{display:grid;gap:7px}
    .field.full{grid-column:1/-1}
    label{font-size:13px;font-weight:700;color:var(--ink)}
    input,select,textarea{width:100%;border:1px solid #c4d2e3;background:#fff;border-radius:10px;padding:12px 14px;color:var(--ink);transition:border .2s,box-shadow .2s}
    textarea{min-height:98px;resize:vertical}
    input::placeholder,textarea::placeholder{color:#9aa8b8}
    input:hover,select:hover,textarea:hover{border-color:#91acd0}
    input:focus,select:focus,textarea:focus{border-color:var(--blue);box-shadow:0 0 0 4px rgba(49,91,154,.12);outline:0}
    .form-submit{grid-column:1/-1;display:flex;align-items:center;gap:16px;flex-wrap:wrap}
    .form-tip{font-size:12px;color:var(--muted)}
    .form-status{font-size:13px;color:var(--blue);display:none}
    .after-form{padding:30px 0 70px;text-align:center}
    .after-form p{color:var(--muted);font-size:14px}
    footer{background:#e8eef6;border-top:1px solid var(--line);padding:52px 0 22px}
    .footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:30px}
    footer h3{font-size:16px;margin-bottom:14px;color:var(--blue)}
    .footer-brand p{color:var(--muted);font-size:13px;max-width:280px;margin-top:12px}
    .footer-links{display:grid;gap:8px;color:var(--muted);font-size:13px}
    .footer-links a:hover{color:var(--blue);text-decoration:underline}
    .copyright{border-top:1px solid #ccd8e6;margin-top:38px;padding-top:18px;color:#74849a;font-size:12px;display:flex;justify-content:space-between;gap:15px;flex-wrap:wrap}
    @media(max-width:900px){
      .nav-links,.nav-actions{display:none}.menu-button{display:block;margin-left:auto}
      .mobile-menu.show{display:block}.hero-grid,.faq-wrap,.form-card{grid-template-columns:1fr;gap:34px}
      .hero{padding-top:65px}.matrix{grid-template-columns:1fr}.preview-grid{grid-template-columns:1fr 1fr}
      .footer-grid{grid-template-columns:1fr 1fr}.form-card{padding:30px}
    }
    @media(max-width:620px){
      .container{width:min(100% - 28px,1180px)}.nav-wrap{height:66px}.brand-name{font-size:16px}
      .hero h1{font-size:39px}.hero-copy{font-size:15px}.hero-actions .btn{width:100%}
      .section{padding:62px 0}.section-head{display:block}.section-head p{margin-top:14px}
      .stats{grid-template-columns:1fr 1fr}.stat-card{padding:17px}.stat-card strong{font-size:27px}
      .comparison{grid-template-columns:1fr}.preview-grid{grid-template-columns:1fr}
      .form-fields{grid-template-columns:1fr}.field.full,.form-submit{grid-column:auto}
      .form-card{padding:24px 19px}.footer-grid{grid-template-columns:1fr 1fr}.copyright{display:block}
      .copyright span{display:block;margin-top:6px}
    }

/* roulang page: category2 */
:root{--blue:#315b9a;--blue-dark:#244879;--blue-soft:#eaf1fb;--coral:#d9825b;--coral-soft:#fff0e9;--warm:#f7f8fa;--ink:#1f2937;--muted:#64748b;--line:#dce3ed;--white:#fff;--radius:18px;--shadow:0 14px 38px rgba(49,91,154,.09);--shadow-hover:0 20px 48px rgba(49,91,154,.16)}
    *{box-sizing:border-box;margin:0;padding:0}
    html{scroll-behavior:smooth}
    body{font-family:system-ui,-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;background:var(--warm);color:var(--ink);line-height:1.75;font-size:16px}
    a{text-decoration:none;color:inherit}
    img{display:block;max-width:100%}
    button,input,select,textarea{font:inherit}
    button{cursor:pointer;border:0}
    .container{width:min(1180px,calc(100% - 40px));margin-inline:auto}
    .site-header{position:sticky;top:0;z-index:30;background:rgba(255,255,255,.95);backdrop-filter:blur(12px);border-bottom:1px solid var(--line);transition:box-shadow .25s}
    .site-header.scrolled{box-shadow:0 8px 26px rgba(31,41,55,.08)}
    .nav-wrap{height:76px;display:flex;align-items:center;gap:30px}
    .brand{display:flex;align-items:center;gap:11px;font-weight:800;color:var(--blue);white-space:nowrap}
    .brand-mark{width:37px;height:37px;border-radius:12px;background:var(--blue);color:#fff;display:grid;place-items:center;font-size:14px;box-shadow:5px 5px 0 var(--coral)}
    .brand-name{font-size:19px;letter-spacing:.02em}
    .nav-links{display:flex;align-items:center;gap:26px;margin-left:auto}
    .nav-link{height:76px;display:flex;align-items:center;color:#516174;font-size:14px;position:relative;transition:color .2s}
    .nav-link:hover{color:var(--blue)}
    .nav-link.active{color:var(--blue);font-weight:700}
    .nav-link.active:after{content:"";position:absolute;bottom:0;left:0;right:0;height:3px;border-radius:3px 3px 0 0;background:var(--coral)}
    .nav-actions{display:flex;gap:10px;margin-left:4px}
    .btn{min-height:46px;padding:0 19px;border-radius:11px;display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:700;font-size:14px;transition:transform .2s,box-shadow .2s,background .2s,border-color .2s}
    .btn:hover{transform:translateY(-2px)}
    .btn:active{transform:translateY(0)}
    .btn:focus-visible,.menu-button:focus-visible,.faq-question:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid rgba(217,130,91,.4);outline-offset:3px}
    .btn-primary{background:var(--blue);color:#fff;box-shadow:0 8px 18px rgba(49,91,154,.2)}
    .btn-primary:hover{background:var(--blue-dark);box-shadow:0 12px 24px rgba(49,91,154,.26)}
    .btn-secondary{background:#fff;border:1px solid #b9c8dc;color:var(--blue)}
    .btn-secondary:hover{background:var(--blue-soft);border-color:var(--blue)}
    .menu-button{display:none;background:#fff;color:var(--blue);border:1px solid var(--line);width:44px;height:44px;border-radius:10px}
    .mobile-menu{display:none;padding:10px 0 20px;border-top:1px solid var(--line)}
    .mobile-menu a{display:block;padding:12px 0;color:var(--muted);font-weight:600}
    .mobile-menu.open{display:block}
    .page-hero{background:#fff;border-bottom:1px solid var(--line);padding:68px 0 56px;position:relative;overflow:hidden}
    .page-hero:after{content:"";position:absolute;width:340px;height:180px;right:4%;top:0;background:var(--blue-soft);border-radius:0 0 0 100%;opacity:.8}
    .hero-inner{display:grid;grid-template-columns:1.15fr .85fr;gap:60px;align-items:center;position:relative;z-index:1}
    .eyebrow,.section-kicker{color:var(--coral);font-size:13px;font-weight:800;letter-spacing:.14em}
    h1{font-size:clamp(38px,5vw,60px);line-height:1.18;letter-spacing:-.045em;margin:15px 0 18px}
    h1 em{font-style:normal;color:var(--blue)}
    .lead{font-size:17px;color:var(--muted);max-width:680px}
    .hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:26px}
    .summary-card{background:#fff;border:1px solid var(--line);border-radius:22px;padding:25px;box-shadow:var(--shadow)}
    .summary-top{display:flex;justify-content:space-between;align-items:start;border-bottom:1px solid var(--line);padding-bottom:18px}
    .summary-number{font-size:46px;line-height:1;color:var(--blue);font-weight:800}
    .summary-card h2{font-size:21px;margin:16px 0 8px}
    .summary-card p{color:var(--muted);font-size:14px}
    .mini-list{display:grid;gap:10px;margin-top:18px}
    .mini-list li{list-style:none;background:var(--warm);border-radius:10px;padding:10px 12px;font-size:13px;color:#506176}
    .mini-list b{color:var(--blue);margin-right:8px}
    .section{padding:84px 0}
    .section-head{display:flex;justify-content:space-between;gap:30px;align-items:end;margin-bottom:30px}
    .section-head h2{font-size:clamp(28px,3.5vw,40px);line-height:1.25;margin-top:8px;letter-spacing:-.03em}
    .section-head p{max-width:540px;color:var(--muted);font-size:15px}
    .filter-bar{display:flex;gap:10px;overflow:auto;padding:5px 0 12px;margin-bottom:28px;scrollbar-width:none}
    .filter-bar::-webkit-scrollbar{display:none}
    .filter{white-space:nowrap;border:1px solid var(--line);background:#fff;color:var(--muted);padding:10px 16px;border-radius:30px;font-size:14px;transition:.2s}
    .filter:hover,.filter.active{color:var(--blue);border-color:#9db5d3;background:var(--blue-soft);font-weight:700}
    .feature-layout{display:grid;grid-template-columns:1.35fr .65fr;gap:18px}
    .feature-card,.guide-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 8px 25px rgba(31,41,55,.04);transition:.25s;overflow:hidden}
    .feature-card:hover,.guide-card:hover{border-color:#a8bfdc;box-shadow:var(--shadow-hover);transform:translateY(-4px)}
    .feature-card{display:grid;grid-template-columns:.95fr 1.05fr;min-height:330px}
    .art{position:relative;overflow:hidden;background:linear-gradient(135deg,#dce8f7,#f9ded1);min-height:250px}
    .art:before{content:"";position:absolute;width:240px;height:240px;border:1px solid rgba(49,91,154,.25);border-radius:50%;left:13%;top:12%;box-shadow:35px -20px 0 rgba(217,130,91,.2)}
    .art:after{content:"99";position:absolute;right:22px;bottom:8px;font-size:88px;font-weight:900;color:rgba(255,255,255,.58)}
    .feature-copy{padding:32px}
    .guide-card{padding:22px}
    .guide-card .art{height:125px;min-height:125px;border-radius:12px;margin-bottom:18px}
    .index{color:var(--coral);font-size:12px;font-weight:800;letter-spacing:.12em}
    .feature-copy h3,.guide-card h3{font-size:24px;line-height:1.35;margin:8px 0}
    .guide-card h3{font-size:19px}
    .feature-copy p,.guide-card p{font-size:14px;color:var(--muted)}
    .tags{display:flex;gap:7px;flex-wrap:wrap;margin-top:16px}
    .tag{padding:4px 9px;background:var(--blue-soft);border-radius:6px;color:var(--blue);font-size:12px}
    .tag.coral{background:var(--coral-soft);color:#a85434}
    .text-link{display:inline-flex;color:var(--blue);font-weight:700;font-size:14px;margin-top:20px;align-items:center;gap:7px}
    .text-link:hover{text-decoration:underline}
    .timeline{border-left:2px solid #c9d8e9;margin:15px 0 0 12px;padding-left:30px;display:grid;gap:20px}
    .timeline-item{position:relative;background:#fff;border:1px solid var(--line);border-radius:14px;padding:20px 22px;box-shadow:0 7px 20px rgba(31,41,55,.035)}
    .timeline-item:before{content:"";position:absolute;width:12px;height:12px;border-radius:50%;background:var(--coral);left:-38px;top:25px;border:3px solid var(--warm)}
    .timeline-item h3{font-size:18px;margin-bottom:5px}
    .timeline-item p{font-size:14px;color:var(--muted)}
    .compare{background:var(--blue-soft);border-radius:22px;padding:34px}
    .compare-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:25px}
    .compare-box{background:#fff;border:1px solid var(--line);border-radius:15px;padding:22px}
    .compare-box.after{border-top:4px solid var(--coral)}
    .compare-box h3{font-size:18px;margin-bottom:12px}
    .compare-box ul{display:grid;gap:9px;color:var(--muted);font-size:14px}
    .compare-box li{list-style:none;padding-left:20px;position:relative}
    .compare-box li:before{content:"•";position:absolute;left:0;color:var(--coral);font-size:20px;line-height:1}
    .faq-wrap{display:grid;grid-template-columns:.75fr 1.25fr;gap:70px;align-items:start}
    .faq-intro p{color:var(--muted);font-size:15px;margin-top:16px}
    .faq-list{display:grid;gap:10px}
    .faq-item{background:#fff;border:1px solid var(--line);border-radius:14px;overflow:hidden}
    .faq-question{width:100%;background:#fff;text-align:left;padding:19px 22px;display:flex;justify-content:space-between;gap:15px;font-weight:700;color:var(--ink)}
    .faq-question span:last-child{color:var(--blue);font-size:22px;line-height:1;transition:transform .2s}
    .faq-answer{display:none;padding:0 22px 20px;color:var(--muted);font-size:14px}
    .faq-item.open .faq-answer{display:block}
    .faq-item.open .faq-question span:last-child{transform:rotate(45deg)}
    .cta{background:var(--blue);color:#fff;border-radius:22px;padding:42px;display:flex;justify-content:space-between;gap:30px;align-items:center}
    .cta p{color:#dce8f7;max-width:620px;margin-top:9px;font-size:15px}
    .cta .btn-secondary{background:#fff;border-color:#fff}
    footer{background:#e8eef6;padding:52px 0 24px;color:#52647a}
    .footer-grid{display:grid;grid-template-columns:1.4fr repeat(3,1fr);gap:35px}
    .footer-brand p{font-size:14px;max-width:300px;margin-top:15px}
    footer h3{font-size:14px;color:var(--ink);margin-bottom:13px}
    .footer-links{display:grid;gap:8px;font-size:13px}
    .footer-links a:hover{color:var(--blue);text-decoration:underline}
    .copyright{border-top:1px solid #cbd7e6;margin-top:35px;padding-top:18px;display:flex;justify-content:space-between;gap:15px;font-size:12px;color:#718198}
    @media(max-width:900px){.nav-links{gap:16px}.nav-actions{display:none}.hero-inner,.feature-layout,.faq-wrap{grid-template-columns:1fr;gap:30px}.feature-card{grid-template-columns:1fr}.feature-card .art{min-height:210px}.footer-grid{grid-template-columns:1fr 1fr}}
    @media(max-width:680px){.container{width:min(100% - 28px,560px)}.nav-wrap{height:68px;justify-content:space-between}.nav-links{display:none}.menu-button{display:block}.page-hero{padding:52px 0 42px}h1{font-size:39px}.section{padding:62px 0}.section-head{display:block}.section-head p{margin-top:13px}.compare{padding:23px}.compare-grid{grid-template-columns:1fr}.cta{display:block;padding:28px 23px}.cta .btn{margin-top:20px}.footer-grid{grid-template-columns:1fr;gap:25px}.copyright{display:block}.copyright span{display:block;margin-top:5px}.mobile-menu{background:#fff}}

/* roulang page: category1 */
:root{
      --blue:#315b9a;
      --blue-dark:#244879;
      --blue-soft:#eaf1fb;
      --coral:#d9825b;
      --coral-soft:#fff0e9;
      --warm:#f7f8fa;
      --ink:#1f2937;
      --muted:#64748b;
      --line:#dce3ed;
      --white:#fff;
      --radius:18px;
      --shadow:0 14px 38px rgba(49,91,154,.09);
      --shadow-hover:0 20px 48px rgba(49,91,154,.16);
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;font-family:system-ui,-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;background:var(--warm);color:var(--ink);line-height:1.75;font-size:16px}
    a{text-decoration:none;color:inherit}
    img{display:block;max-width:100%}
    button,input,select,textarea{font:inherit}
    button{cursor:pointer;border:0}
    .container{width:min(1180px,calc(100% - 40px));margin-inline:auto}
    .site-header{position:sticky;top:0;z-index:30;background:rgba(255,255,255,.95);backdrop-filter:blur(12px);border-bottom:1px solid var(--line);transition:box-shadow .25s}
    .site-header.scrolled{box-shadow:0 8px 26px rgba(31,41,55,.08)}
    .nav-wrap{height:76px;display:flex;align-items:center;gap:30px}
    .brand{display:flex;align-items:center;gap:11px;font-weight:800;color:var(--blue);white-space:nowrap}
    .brand-mark{width:37px;height:37px;border-radius:12px;background:var(--blue);color:#fff;display:grid;place-items:center;font-size:14px;box-shadow:5px 5px 0 var(--coral)}
    .brand-name{font-size:19px;letter-spacing:.02em}
    .nav-links{display:flex;align-items:center;gap:26px;margin-left:auto}
    .nav-link{height:76px;display:flex;align-items:center;color:#516174;font-size:14px;position:relative;transition:color .2s}
    .nav-link:hover{color:var(--blue)}
    .nav-link.active{color:var(--blue);font-weight:700}
    .nav-link.active:after{content:"";position:absolute;bottom:0;left:0;right:0;height:3px;border-radius:3px 3px 0 0;background:var(--coral)}
    .nav-actions{display:flex;gap:10px;margin-left:4px}
    .btn{min-height:46px;padding:0 19px;border-radius:11px;display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:700;font-size:14px;transition:transform .2s,box-shadow .2s,background .2s,border-color .2s}
    .btn:hover{transform:translateY(-2px)}
    .btn:active{transform:translateY(0)}
    .btn:focus-visible,.nav-link:focus-visible,.footer-links a:focus-visible,.menu-button:focus-visible,.filter-button:focus-visible,.faq-question:focus-visible{outline:3px solid rgba(217,130,91,.42);outline-offset:3px}
    .btn-primary{background:var(--blue);color:#fff;box-shadow:0 8px 18px rgba(49,91,154,.2)}
    .btn-primary:hover{background:var(--blue-dark);box-shadow:0 12px 24px rgba(49,91,154,.26)}
    .btn-secondary{background:#fff;border:1px solid #b9c8dc;color:var(--blue)}
    .btn-secondary:hover{background:var(--blue-soft);border-color:var(--blue)}
    .menu-button{display:none;background:#fff;color:var(--blue);border:1px solid var(--line);width:44px;height:44px;border-radius:10px}
    .mobile-menu{display:none;padding:10px 0 20px;border-top:1px solid var(--line)}
    .mobile-menu a{display:block;padding:12px 0;color:var(--muted);font-weight:600}
    .mobile-menu .btn{width:100%;margin-top:8px}
    .hero{padding:76px 0 52px;background:#fff;position:relative;overflow:hidden}
    .hero:before{content:"";position:absolute;width:390px;height:390px;border-radius:50%;background:var(--blue-soft);right:-120px;top:-170px;opacity:.8}
    .hero-grid{display:grid;grid-template-columns:1.12fr .88fr;gap:62px;align-items:center;position:relative}
    .eyebrow,.section-kicker{color:var(--coral);font-size:13px;font-weight:800;letter-spacing:.14em}
    .hero h1{font-size:clamp(38px,5vw,60px);line-height:1.18;letter-spacing:-.045em;margin:15px 0 20px}
    .hero h1 em{font-style:normal;color:var(--blue)}
    .hero-copy{font-size:17px;color:var(--muted);max-width:660px}
    .hero-actions{display:flex;gap:12px;margin-top:28px;flex-wrap:wrap}
    .summary-card{background:#fff;border:1px solid var(--line);border-radius:24px;padding:26px;box-shadow:var(--shadow);position:relative}
    .summary-top{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line);padding-bottom:20px}
    .summary-number{font-size:48px;font-weight:800;line-height:1;color:var(--blue)}
    .summary-number small{font-size:17px;font-weight:700}
    .summary-list{display:grid;gap:12px;margin-top:20px}
    .summary-list div{display:flex;justify-content:space-between;gap:18px;color:var(--muted);font-size:14px}
    .summary-list b{color:var(--ink)}
    .filter-bar{background:var(--warm);border:1px solid var(--line);padding:14px;border-radius:15px;display:flex;gap:9px;align-items:center;overflow:auto;scrollbar-width:none}
    .filter-bar::-webkit-scrollbar{display:none}
    .filter-label{font-size:13px;color:var(--muted);font-weight:700;white-space:nowrap;padding:0 8px}
    .filter-button{white-space:nowrap;padding:9px 15px;border-radius:9px;background:#fff;border:1px solid transparent;color:var(--muted);font-size:13px;transition:.2s}
    .filter-button:hover{color:var(--blue);border-color:#b9c8dc}
    .filter-button.active{background:var(--blue);color:#fff;box-shadow:0 5px 12px rgba(49,91,154,.16)}
    .section{padding:82px 0}
    .section-head{display:flex;justify-content:space-between;gap:30px;align-items:end;margin-bottom:30px}
    .section-head h2{font-size:clamp(28px,3.5vw,40px);line-height:1.25;margin:9px 0 0;letter-spacing:-.03em}
    .section-head p{max-width:540px;color:var(--muted);font-size:15px;margin:0}
    .index-layout{display:grid;grid-template-columns:250px 1fr;gap:25px;align-items:start}
    .side-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:0 8px 25px rgba(31,41,55,.04);position:sticky;top:100px}
    .side-card h3{font-size:17px;margin:0 0 15px}
    .side-link{display:flex;justify-content:space-between;align-items:center;padding:11px 0;border-bottom:1px solid #edf1f6;color:var(--muted);font-size:14px}
    .side-link:last-child{border-bottom:0}
    .side-link:hover,.side-link.current{color:var(--blue);font-weight:700}
    .topic-list{display:grid;gap:14px}
    .topic-item{display:grid;grid-template-columns:112px 1fr auto;gap:20px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:16px;padding:16px;transition:.25s}
    .topic-item:hover{border-color:#a8bfdc;box-shadow:var(--shadow-hover);transform:translateY(-3px)}
    .topic-art{height:92px;border-radius:12px;background:linear-gradient(135deg,#dce8f7,#f5d9cb);position:relative;overflow:hidden}
    .topic-art:before{content:"";position:absolute;width:100px;height:100px;border-radius:50%;background:rgba(49,91,154,.2);right:-12px;bottom:-38px}
    .topic-item:nth-child(2) .topic-art{background:linear-gradient(135deg,#eef3f9,#e8dff1)}
    .topic-item:nth-child(3) .topic-art{background:linear-gradient(135deg,#f4e8df,#dce8f7)}
    .topic-item:nth-child(4) .topic-art{background:linear-gradient(135deg,#e1edf0,#f7e0d6)}
    .topic-index{font-size:12px;color:var(--coral);font-weight:800;letter-spacing:.1em}
    .topic-item h3{font-size:19px;margin:3px 0 4px}
    .topic-item p{margin:0;color:var(--muted);font-size:14px}
    .topic-meta{text-align:right;color:var(--muted);font-size:12px;white-space:nowrap}
    .topic-meta strong{display:block;color:var(--blue);font-size:14px;margin-bottom:8px}
    .tags{display:flex;gap:7px;flex-wrap:wrap;margin-top:10px}
    .tag{padding:4px 9px;background:var(--blue-soft);border-radius:6px;color:var(--blue);font-size:12px}
    .tag.coral{background:var(--coral-soft);color:#a85434}
    .feature-section{background:#fff}
    .feature-grid{display:grid;grid-template-columns:1.45fr .8fr .8fr;gap:16px}
    .feature-main{min-height:300px;border-radius:20px;padding:28px;background:var(--blue);color:#fff;position:relative;overflow:hidden;display:flex;flex-direction:column;justify-content:end}
    .feature-main:after{content:"";position:absolute;width:280px;height:280px;border-radius:50%;right:-75px;top:-90px;background:rgba(255,255,255,.12)}
    .feature-main>*{position:relative;z-index:1}
    .feature-main p{color:#dbe7f6;max-width:480px;margin:8px 0}
    .feature-main h3{font-size:26px;margin:8px 0 0}
    .feature-small{border:1px solid var(--line);border-radius:18px;padding:22px;background:var(--warm);display:flex;flex-direction:column;justify-content:space-between}
    .feature-small h3{font-size:19px;margin:12px 0 6px}
    .feature-small p{font-size:14px;color:var(--muted);margin:0}
    .small-mark{width:42px;height:42px;border-radius:12px;background:var(--coral-soft);color:#a85434;display:grid;place-items:center;font-weight:800}
    .faq-wrap{display:grid;grid-template-columns:.72fr 1.28fr;gap:70px;align-items:start}
    .faq-intro p{color:var(--muted);font-size:15px;margin-top:18px}
    .faq-list{display:grid;gap:10px}
    .faq-item{background:#fff;border:1px solid var(--line);border-radius:14px;overflow:hidden}
    .faq-question{width:100%;display:flex;justify-content:space-between;align-items:center;text-align:left;background:#fff;padding:19px 21px;color:var(--ink);font-weight:700}
    .faq-question:hover{background:var(--blue-soft)}
    .faq-icon{color:var(--blue);font-size:22px;transition:transform .2s}
    .faq-answer{display:none;padding:0 21px 19px;color:var(--muted);font-size:14px}
    .faq-item.open .faq-answer{display:block}
    .faq-item.open .faq-icon{transform:rotate(45deg)}
    .cta-section{padding:0 0 88px}
    .cta-box{background:var(--blue-soft);border:1px solid #ccdaed;border-radius:24px;padding:34px 38px;display:flex;justify-content:space-between;gap:30px;align-items:center}
    .cta-box h2{font-size:clamp(25px,3vw,34px);margin:0 0 8px}
    .cta-box p{color:var(--muted);margin:0;max-width:650px;font-size:15px}
    footer{background:#e7edf5;padding:55px 0 22px;border-top:1px solid var(--line)}
    .footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:38px}
    .footer-brand p{color:var(--muted);font-size:14px;max-width:300px;margin-top:18px}
    footer h3{font-size:15px;margin:4px 0 13px}
    .footer-links{display:grid;gap:8px;color:var(--muted);font-size:14px}
    .footer-links a:hover{color:var(--blue);text-decoration:underline;text-underline-offset:3px}
    .copyright{border-top:1px solid #cbd6e4;margin-top:40px;padding-top:18px;display:flex;justify-content:space-between;gap:20px;color:#718096;font-size:12px}
    @media(max-width:900px){
      .nav-links{gap:15px}.nav-actions{display:none}
      .hero-grid{grid-template-columns:1fr;gap:35px}
      .index-layout{grid-template-columns:1fr}.side-card{position:static}
      .feature-grid{grid-template-columns:1fr 1fr}.feature-main{grid-column:1/-1}
      .faq-wrap{grid-template-columns:1fr;gap:30px}
      .footer-grid{grid-template-columns:1.3fr 1fr 1fr}
      .footer-grid>div:last-child{grid-column:2}
    }
    @media(max-width:680px){
      .container{width:min(100% - 28px,1180px)}
      .nav-wrap{height:68px;gap:12px}.brand-name{font-size:16px}.brand-mark{width:34px;height:34px}
      .nav-links{display:none}.menu-button{display:block;margin-left:auto}
      .mobile-menu.is-open{display:block}
      .hero{padding:54px 0 42px}.hero h1{font-size:40px}
      .hero-copy{font-size:16px}.hero-actions .btn{flex:1;min-width:145px}
      .section{padding:60px 0}.section-head{display:block}.section-head p{margin-top:15px}
      .topic-item{grid-template-columns:78px 1fr;gap:13px;padding:13px}
      .topic-art{height:78px}.topic-meta{grid-column:2;text-align:left;display:flex;gap:10px;align-items:center}
      .topic-meta strong{margin:0}.feature-grid{grid-template-columns:1fr}.feature-main{grid-column:auto;min-height:270px}
      .cta-section{padding-bottom:60px}.cta-box{display:block;padding:27px 23px}.cta-box .btn{margin-top:21px;width:100%}
      .footer-grid{grid-template-columns:1fr 1fr;gap:28px}.footer-brand{grid-column:1/-1}.footer-grid>div:last-child{grid-column:auto}
      .copyright{display:block}.copyright span{display:block;margin-top:6px}
    }
    @media(max-width:420px){
      .hero-actions{display:grid}.hero-actions .btn{width:100%}
      .summary-number{font-size:40px}.topic-item h3{font-size:17px}
    }