/* roulang page: index */
:root{
            --blue:#2468d8;
            --blue-dark:#164a9d;
            --blue-soft:#eaf3ff;
            --cyan:#39aeb7;
            --ink:#18324f;
            --muted:#6d7f94;
            --paper:#ffffff;
            --bg:#f5f8fc;
            --line:#dce7f3;
            --yellow:#f5c85b;
            --radius:16px;
            --shadow:0 14px 34px rgba(34,76,125,.10);
            --shadow-hover:0 18px 42px rgba(34,76,125,.16);
        }
        *{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","Hiragino Sans GB","Microsoft YaHei",sans-serif;font-size:16px;line-height:1.75}
        a{color:var(--blue);text-decoration:none;transition:.25s ease}
        a:hover{color:var(--blue-dark)}
        img{max-width:100%;display:block}
        button,input,select,textarea{font:inherit}
        .container{max-width:1200px;margin:0 auto;padding:0 24px}
        .site-header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.96);border-bottom:1px solid var(--line);box-shadow:0 4px 18px rgba(25,70,120,.06)}
        .topbar{min-height:76px;display:flex;align-items:center;justify-content:space-between;gap:28px}
        .brand{display:inline-flex;align-items:center;gap:11px;color:var(--ink);font-weight:800;letter-spacing:-.03em;white-space:nowrap}
        .brand:hover{color:var(--blue)}
        .brand-mark{width:28px;height:28px;background:var(--blue);display:grid;place-items:center;position:relative;box-shadow:4px 4px 0 var(--yellow)}
        .brand-mark:after{content:"";width:0;height:0;border-top:7px solid transparent;border-bottom:7px solid transparent;border-left:10px solid #fff;margin-left:3px}
        .brand-name{font-size:18px}
        .main-nav{display:flex;align-items:center;gap:8px;margin-left:auto}
        .main-nav a{padding:10px 14px;color:#50657c;font-size:14px;font-weight:700;border-radius:8px}
        .main-nav a:hover,.main-nav a.active{background:var(--blue-soft);color:var(--blue)}
        .nav-cta,.button.primary{background:var(--blue);color:#fff!important;border:1px solid var(--blue);box-shadow:0 7px 16px rgba(36,104,216,.2)}
        .nav-cta{padding:12px 19px!important;margin-left:8px}
        .nav-cta:hover,.button.primary:hover{background:var(--blue-dark);border-color:var(--blue-dark);transform:translateY(-2px)}
        .menu-toggle{display:none;background:var(--blue);color:#fff;border:0;padding:10px 14px;border-radius:8px;cursor:pointer}
        .hero{padding:76px 0 42px;background:#fbfdff;position:relative;overflow:hidden}
        .hero:before{content:"";position:absolute;right:-80px;top:30px;width:340px;height:230px;background-image:radial-gradient(#bdd4f2 1px,transparent 1px);background-size:14px 14px;opacity:.7}
        .hero-grid{display:grid;grid-template-columns:1.02fr .98fr;gap:58px;align-items:center;position:relative}
        .eyebrow,.section-kicker{display:inline-flex;align-items:center;gap:8px;color:var(--blue);font-size:13px;font-weight:800;letter-spacing:.08em}
        .eyebrow:before,.section-kicker:before{content:"";width:18px;height:4px;background:var(--yellow);box-shadow:7px 0 0 var(--cyan)}
        h1,h2,h3{margin:0;color:var(--ink);line-height:1.25;letter-spacing:-.035em}
        h1{font-size:clamp(38px,5vw,64px);max-width:680px;margin:17px 0 20px}
        .hero-copy{font-size:18px;color:var(--muted);max-width:620px;margin:0 0 29px}
        .button{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:12px 22px;border-radius:9px;font-weight:800;border:1px solid var(--line);margin:0 10px 10px 0;transition:.25s ease}
        .button.secondary{background:#fff;color:var(--blue);border-color:#a9c7ec}
        .button.secondary:hover{background:var(--blue-soft);border-color:var(--blue);transform:translateY(-2px)}
        .hero-notes{display:flex;flex-wrap:wrap;gap:10px;margin-top:10px}
        .badge{display:inline-flex;align-items:center;padding:5px 10px;border-radius:5px;background:var(--blue-soft);color:var(--blue-dark);font-size:12px;font-weight:700}
        .badge.yellow{background:#fff5d8;color:#8a6510}
        .hero-panel{display:grid;grid-template-columns:1.28fr .72fr;grid-template-rows:1fr 1fr;gap:14px}
        .index-panel,.mini-panel{background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);border-radius:var(--radius);padding:22px}
        .index-panel{grid-row:span 2;background:#fff url("data:image/svg+xml,%3Csvg width='24' height='24' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M0 23.5h24M23.5 0v24' stroke='%23edf4fc'/%3E%3C/svg%3E")}
        .panel-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:24px}
        .panel-title{font-weight:800;font-size:18px}.status-dot{width:9px;height:9px;background:#55c79a;display:inline-block;border-radius:50%;box-shadow:0 0 0 5px #e7f8f0}
        .content-row{display:flex;gap:12px;padding:14px 0;border-top:1px solid var(--line)}
        .thumb{width:78px;height:54px;flex:none;background:linear-gradient(135deg,#c7def9,#77b4d1);position:relative}
        .thumb:after{content:"▶";position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);color:#fff;font-size:14px}
        .row-title{font-size:14px;font-weight:800;line-height:1.4}.row-meta{font-size:12px;color:var(--muted)}
        .mini-panel{display:flex;flex-direction:column;justify-content:space-between}
        .mini-num{font-size:31px;font-weight:900;color:var(--blue);line-height:1}
        .mini-label{font-size:13px;color:var(--muted);margin-top:8px}
        .notice{margin-top:36px;padding:12px 16px;background:#fff8e5;border-left:4px solid var(--yellow);color:#735d2c;font-size:13px}
        section{padding:92px 0}
        .section-head{display:flex;justify-content:space-between;align-items:end;gap:30px;margin-bottom:34px}
        .section-head h2{font-size:clamp(28px,3vw,40px);margin-top:10px}
        .section-desc{max-width:540px;color:var(--muted);margin:0}
        .service-layout{display:grid;grid-template-columns:1.3fr .7fr;gap:18px}
        .service-main,.service-card,.case-card,.path-card,.faq-wrap,.contact-box{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
        .service-main{padding:32px;display:flex;justify-content:space-between;gap:25px;min-height:230px}
        .service-main h3{font-size:25px;margin:15px 0 10px}.service-main p,.service-card p,.case-card p,.path-card p{color:var(--muted);margin:0}
        .service-symbol{width:86px;height:86px;background:var(--blue-soft);display:grid;place-items:center;color:var(--blue);font-size:36px;font-weight:900;border:1px solid #c7dcf8;flex:none}
        .service-side{display:grid;gap:18px}.service-card{padding:25px}.service-card h3{font-size:19px;margin-bottom:7px}
        .data-band{background:var(--blue-soft);border-top:1px solid #cfe1f6;border-bottom:1px solid #cfe1f6}
        .data-grid{display:grid;grid-template-columns:1.4fr repeat(3,1fr);gap:20px;align-items:center}
        .data-intro h2{font-size:27px;margin:8px 0}.data-intro p{color:var(--muted);margin:0}
        .stat{padding:18px 20px;border-left:1px solid #cbdcf0}.stat strong{display:block;color:var(--blue);font-size:35px;line-height:1.1}.stat span{font-size:13px;color:var(--muted)}
        .cases{background:#fff}
        .case-grid{display:grid;grid-template-columns:1.35fr .65fr;gap:18px}
        .case-card{overflow:hidden}.case-card.featured{display:grid;grid-template-columns:.9fr 1.1fr}
        .case-image{min-height:220px;background:linear-gradient(135deg,#bddbfa 0%,#72bfc5 100%);position:relative}
        .case-image:before{content:"索引示例";position:absolute;left:22px;top:22px;color:#fff;border:1px solid rgba(255,255,255,.7);padding:6px 10px;font-size:12px}
        .case-body{padding:27px}.case-body h3{font-size:23px;margin:12px 0}.case-body small{color:var(--muted)}
        .case-side{display:grid;gap:18px}.case-side .case-card{padding:22px}.case-side h3{font-size:18px;margin:12px 0 7px}
        .path-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
        .path-card{padding:28px;position:relative}.path-num{font-size:13px;color:var(--blue);font-weight:900;letter-spacing:.1em}.path-card h3{font-size:20px;margin:14px 0 8px}.path-card a{display:inline-block;margin-top:20px;font-weight:800}
        .faq-section{background:#f9fbfe}.faq-wrap{max-width:880px;margin:0 auto;padding:8px 25px}
        .accordion-item{border-bottom:1px solid var(--line)}.accordion-item:last-child{border-bottom:0}
        .accordion-title{display:block;padding:20px 8px;color:var(--ink);font-weight:800;position:relative}.accordion-title:after{content:"+";position:absolute;right:8px;color:var(--blue);font-size:22px}.is-active .accordion-title{color:var(--blue)}.is-active .accordion-title:after{content:"−"}
        .accordion-content{padding:0 8px 20px;color:var(--muted);font-size:14px}
        .contact-section{padding-top:75px}.contact-box{display:grid;grid-template-columns:.82fr 1.18fr;overflow:hidden}.contact-copy{padding:38px;background:var(--blue);color:#fff}.contact-copy h2{color:#fff;font-size:34px;margin:13px 0}.contact-copy p{color:#dceaff}.contact-list{margin-top:28px;padding:0;list-style:none}.contact-list li{padding:10px 0;border-bottom:1px solid rgba(255,255,255,.2);font-size:14px}
        .contact-form{padding:34px}.form-label{display:block;font-size:13px;font-weight:800;margin-bottom:7px}.form-field{margin-bottom:18px}input,select,textarea{width:100%;border:1px solid var(--line);border-radius:8px;padding:11px 13px;background:#fff;color:var(--ink);outline:none}input:focus,select:focus,textarea:focus{border-color:var(--blue);box-shadow:0 0 0 3px rgba(36,104,216,.13)}textarea{min-height:108px;resize:vertical}.checkline{font-size:13px;color:var(--muted);display:flex;gap:8px;align-items:flex-start;margin:12px 0 20px}.checkline input{width:auto;margin-top:6px}
        footer{padding:42px 0 25px;background:#eaf1f8;border-top:1px solid var(--line)}.footer-grid{display:grid;grid-template-columns:1.1fr 1fr 1fr;gap:30px}.footer-brand p{color:var(--muted);font-size:13px;max-width:280px}.footer-title{font-weight:800;margin-bottom:12px}.footer-links{display:flex;flex-wrap:wrap;gap:10px 20px}.footer-links a{font-size:14px;color:#58708b}.footer-links a:hover{color:var(--blue)}.copyright{border-top:1px solid var(--line);margin-top:28px;padding-top:18px;color:#8091a4;font-size:12px;display:flex;justify-content:space-between;gap:15px}
        @media(max-width:900px){.main-nav{gap:0}.main-nav a{padding:9px 8px}.hero-grid{gap:30px}.data-grid{grid-template-columns:1fr 1fr}.data-intro{grid-column:span 2}.stat{border-left:0;border-top:1px solid #cbdcf0}.service-layout,.case-grid{grid-template-columns:1fr}}
        @media(max-width:700px){.container{padding:0 18px}.topbar{min-height:68px}.brand-name{font-size:15px}.menu-toggle{display:block}.main-nav{display:none;position:absolute;top:68px;left:0;right:0;background:#fff;padding:12px 18px 18px;border-bottom:1px solid var(--line);box-shadow:var(--shadow);flex-direction:column;align-items:stretch}.main-nav.is-open{display:flex}.main-nav a{padding:13px 12px}.nav-cta{margin:6px 0 0;text-align:center}.hero{padding:52px 0 28px}.hero-grid{grid-template-columns:1fr}.hero-panel{grid-template-columns:1fr 1fr}.index-panel{grid-column:span 2;grid-row:auto}.section-head{display:block}.section-desc{margin-top:13px}.service-main,.case-card.featured,.contact-box{display:block}.service-symbol{margin-top:24px}.case-image{min-height:170px}.path-grid{grid-template-columns:1fr}.faq-wrap{padding:5px 14px}.contact-copy,.contact-form{padding:28px 22px}.footer-grid{grid-template-columns:1fr}.copyright{display:block}.copyright span{display:block;margin-top:8px}}
        @media(max-width:420px){h1{font-size:36px}.hero-panel{display:block}.mini-panel{margin-top:14px}.data-grid{grid-template-columns:1fr}.data-intro{grid-column:auto}.stat{padding-left:0}.button{width:100%;margin-right:0}}

/* roulang page: category2 */
:root{
      --blue:#2468d8;--blue-dark:#164a9d;--blue-soft:#eaf3ff;--cyan:#39aeb7;
      --ink:#18324f;--muted:#6d7f94;--paper:#fff;--bg:#f5f8fc;--line:#dce7f3;
      --yellow:#f5c85b;--radius:16px;--shadow:0 14px 34px rgba(34,76,125,.10);
      --shadow-hover:0 18px 42px rgba(34,76,125,.16)
    }
    *{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;font-size:16px;line-height:1.75}
    a{color:var(--blue);text-decoration:none;transition:.25s ease}a:hover{color:var(--blue-dark)}
    img{max-width:100%;display:block}button,input,select,textarea{font:inherit}
    .container{max-width:1200px;margin:0 auto;padding:0 24px}
    .site-header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.97);border-bottom:1px solid var(--line);box-shadow:0 4px 18px rgba(25,70,120,.06)}
    .topbar{min-height:76px;display:flex;align-items:center;gap:28px}
    .brand{display:inline-flex;align-items:center;gap:11px;color:var(--ink);font-weight:800;letter-spacing:-.03em;white-space:nowrap}
    .brand:hover{color:var(--blue)}.brand-mark{width:28px;height:28px;background:var(--blue);display:grid;place-items:center;position:relative;box-shadow:4px 4px 0 var(--yellow)}
    .brand-mark:after{content:"";width:0;height:0;border-top:7px solid transparent;border-bottom:7px solid transparent;border-left:10px solid #fff;margin-left:3px}
    .brand-name{font-size:18px}.main-nav{display:flex;align-items:center;gap:8px;margin-left:auto}
    .main-nav a{padding:10px 14px;color:#50657c;font-size:14px;font-weight:700;border-radius:8px}
    .main-nav a:hover,.main-nav a.active{background:var(--blue-soft);color:var(--blue)}
    .nav-cta{background:var(--blue)!important;color:#fff!important;border:1px solid var(--blue);padding:12px 19px!important;margin-left:8px;box-shadow:0 7px 16px rgba(36,104,216,.2)}
    .nav-cta:hover{background:var(--blue-dark)!important;transform:translateY(-2px)}
    .menu-toggle{display:none;background:var(--blue);color:#fff;border:0;padding:10px 14px;border-radius:8px;cursor:pointer}
    .hero{padding:72px 0 48px;background:#fbfdff;position:relative;overflow:hidden}
    .hero:before{content:"";position:absolute;right:-50px;top:35px;width:350px;height:220px;background-image:radial-gradient(#bdd4f2 1px,transparent 1px);background-size:14px 14px;opacity:.7}
    .hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:58px;align-items:center;position:relative}
    .eyebrow,.section-kicker{display:inline-flex;align-items:center;gap:8px;color:var(--blue);font-size:13px;font-weight:800;letter-spacing:.08em}
    .eyebrow:before,.section-kicker:before{content:"";width:18px;height:4px;background:var(--yellow);box-shadow:7px 0 0 var(--cyan)}
    h1{font-size:clamp(34px,5vw,58px);line-height:1.18;letter-spacing:-.045em;margin:18px 0 20px}
    h2{font-size:clamp(28px,3vw,40px);line-height:1.25;margin:10px 0}
    h3{line-height:1.35}.hero-copy{font-size:18px;color:var(--muted);max-width:620px;margin:0 0 28px}
    .button{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:12px 22px;border-radius:9px;font-weight:800;border:1px solid var(--line);margin:0 10px 10px 0;transition:.25s ease}
    .button.primary{background:var(--blue);color:#fff;border-color:var(--blue);box-shadow:0 7px 16px rgba(36,104,216,.2)}
    .button.primary:hover{background:var(--blue-dark);transform:translateY(-2px)}
    .button.secondary{background:#fff;color:var(--blue);border-color:#a9c7ec}.button.secondary:hover{background:var(--blue-soft);transform:translateY(-2px)}
    .badge{display:inline-flex;padding:5px 10px;border-radius:5px;background:var(--blue-soft);color:var(--blue-dark);font-size:12px;font-weight:700;margin:3px 6px 3px 0}
    .badge.yellow{background:#fff5d8;color:#8a6510}
    .index-panel{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:26px;position:relative}
    .index-panel:after{content:"索引";position:absolute;right:22px;top:20px;color:#c8d8eb;font-weight:900;font-size:28px}
    .panel-title{font-size:21px;font-weight:800;margin-bottom:18px}.content-row{display:flex;gap:13px;padding:15px 0;border-top:1px solid var(--line)}
    .pixel-dot{width:12px;height:12px;background:var(--cyan);margin-top:7px;flex:none;box-shadow:4px 4px 0 var(--yellow)}
    .row-title{font-weight:800;line-height:1.4}.row-meta{font-size:12px;color:var(--muted)}
    .notice{margin-top:24px;padding:13px 16px;background:#fffaf0;border:1px solid #f1dfae;color:#765b20;font-size:13px;border-radius:9px}
    section{padding:82px 0}.section-head{display:flex;justify-content:space-between;align-items:end;gap:30px;margin-bottom:32px}
    .section-desc{max-width:560px;color:var(--muted);margin:0}.feature-layout{display:grid;grid-template-columns:1.3fr .7fr;gap:18px}
    .feature-card,.mini-card,.step-card,.faq-wrap,.feedback-box{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
    .feature-card{padding:32px;min-height:250px;position:relative;overflow:hidden}.feature-card:before{content:"02";position:absolute;right:28px;bottom:-25px;font-size:130px;font-weight:900;color:#f0f6fd}
    .feature-card>*{position:relative}.feature-card h3{font-size:26px;margin:16px 0 10px}.feature-card p,.mini-card p,.step-card p{color:var(--muted);margin:0}
    .mini-stack{display:grid;gap:18px}.mini-card{padding:24px}.mini-card h3{font-size:19px;margin:10px 0 6px}
    .data-band{background:var(--blue-soft);border-top:1px solid #cfe1f6;border-bottom:1px solid #cfe1f6}.data-grid{display:grid;grid-template-columns:1.35fr repeat(3,1fr);gap:22px;align-items:center}
    .data-intro p{color:var(--muted);margin:0}.stat{border-left:1px solid #c6d9ef;padding-left:22px}.stat strong{font-size:34px;color:var(--blue);display:block;line-height:1.2}.stat span{font-size:13px;color:var(--muted)}
    .example-layout{display:grid;grid-template-columns:1fr 1fr;gap:18px}.example-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:25px;box-shadow:var(--shadow);transition:.25s}
    .example-card:hover,.feature-card:hover,.mini-card:hover,.step-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}.example-card h3{margin:15px 0 8px;font-size:21px}.example-card p{color:var(--muted);margin:0 0 16px}.meta{font-size:13px;color:var(--muted);display:flex;justify-content:space-between;border-top:1px solid var(--line);padding-top:13px}
    .steps{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.step-card{padding:27px}.step-no{font-size:31px;color:var(--blue);font-weight:900}.step-card h3{margin:8px 0}
    .faq-section{background:#f9fbfe}.faq-wrap{max-width:900px;margin:auto;padding:8px 25px}.accordion-item{border-bottom:1px solid var(--line)}.accordion-item:last-child{border-bottom:0}
    .accordion-title{display:block;padding:20px 8px;color:var(--ink);font-weight:800;position:relative}.accordion-title:after{content:"+";position:absolute;right:8px;color:var(--blue);font-size:22px}.is-active .accordion-title{color:var(--blue)}.is-active .accordion-title:after{content:"−"}.accordion-content{padding:0 8px 19px;color:var(--muted)}
    .cta{padding:68px 0;background:#eaf3ff}.cta-box{display:flex;align-items:center;justify-content:space-between;gap:30px}.cta-box p{color:var(--muted);max-width:650px}
    .feedback-box{padding:30px}.form-label{display:block;font-size:13px;font-weight:800;margin-bottom:7px}.form-field{margin-bottom:17px}
    input,select,textarea{width:100%;border:1px solid var(--line);border-radius:8px;padding:11px 13px;background:#fff;color:var(--ink)}textarea{min-height:120px;resize:vertical}
    input:focus,select:focus,textarea:focus,button:focus,a:focus{outline:3px solid rgba(36,104,216,.25);outline-offset:2px}.check{font-size:13px;color:var(--muted)}
    footer{background:#edf3f9;border-top:1px solid var(--line);padding:48px 0 22px}.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:40px}.footer-brand p{color:var(--muted);font-size:14px;max-width:350px}.footer-title{font-weight:800;margin-bottom:12px}.footer-links{display:grid;gap:7px;font-size:14px}.footer-links a{color:var(--muted)}.footer-links a:hover{color:var(--blue)}
    .copyright{display:flex;justify-content:space-between;gap:18px;border-top:1px solid var(--line);margin-top:35px;padding-top:18px;color:var(--muted);font-size:12px}
    @media(max-width:900px){.main-nav{gap:2px}.main-nav a{padding:9px 8px}.hero-grid{gap:30px}.data-grid{grid-template-columns:1fr 1fr}.data-intro{grid-column:1/-1}.stat{border-left:0;padding-left:0}}
    @media(max-width:700px){.container{padding:0 18px}.topbar{min-height:68px}.menu-toggle{display:block;margin-left:auto}.main-nav{display:none;position:absolute;left:18px;right:18px;top:70px;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);padding:10px;border-radius:12px;flex-direction:column;align-items:stretch}.main-nav.open{display:flex}.main-nav a{min-height:44px}.nav-cta{margin-left:0;text-align:center}.hero{padding:52px 0 35px}.hero-grid,.feature-layout,.example-layout{grid-template-columns:1fr}.hero-copy{font-size:16px}.section-head,.cta-box{display:block}.section-head{margin-bottom:24px}section{padding:62px 0}.steps{grid-template-columns:1fr}.data-grid{grid-template-columns:1fr 1fr}.footer-grid{grid-template-columns:1fr 1fr}.footer-brand{grid-column:1/-1}.copyright{display:block}.copyright span{display:block;margin-top:6px}}
    @media(max-width:460px){h1{font-size:34px}.data-grid{grid-template-columns:1fr}.stat{border-top:1px solid #c6d9ef;padding-top:16px}.footer-grid{grid-template-columns:1fr}.footer-brand{grid-column:auto}.button{width:100%;margin-right:0}.faq-wrap{padding:5px 14px}}

/* roulang page: category1 */
:root{
      --blue:#2468d8;
      --blue-dark:#164a9d;
      --blue-soft:#eaf3ff;
      --cyan:#39aeb7;
      --ink:#18324f;
      --muted:#6d7f94;
      --paper:#fff;
      --bg:#f5f8fc;
      --line:#dce7f3;
      --yellow:#f5c85b;
      --radius:16px;
      --shadow:0 14px 34px rgba(34,76,125,.10);
      --shadow-hover:0 18px 42px rgba(34,76,125,.16);
    }
    *{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;font-size:16px;line-height:1.75}
    a{color:var(--blue);text-decoration:none;transition:.25s ease}
    a:hover{color:var(--blue-dark)}
    img{max-width:100%;display:block}
    button,input,select,textarea{font:inherit}
    button:focus,input:focus,select:focus,textarea:focus,a:focus{outline:3px solid rgba(36,104,216,.25);outline-offset:3px}
    .container{max-width:1200px;margin:0 auto;padding:0 24px}
    .site-header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.97);border-bottom:1px solid var(--line);box-shadow:0 4px 18px rgba(25,70,120,.06)}
    .topbar{min-height:76px;display:flex;align-items:center;justify-content:space-between;gap:28px}
    .brand{display:inline-flex;align-items:center;gap:11px;color:var(--ink);font-weight:800;letter-spacing:-.03em;white-space:nowrap}
    .brand:hover{color:var(--blue)}
    .brand-mark{width:28px;height:28px;background:var(--blue);display:grid;place-items:center;position:relative;box-shadow:4px 4px 0 var(--yellow)}
    .brand-mark:after{content:"";width:0;height:0;border-top:7px solid transparent;border-bottom:7px solid transparent;border-left:10px solid #fff;margin-left:3px}
    .brand-name{font-size:18px}
    .main-nav{display:flex;align-items:center;gap:8px;margin-left:auto}
    .main-nav a{padding:10px 14px;color:#50657c;font-size:14px;font-weight:700;border-radius:8px}
    .main-nav a:hover,.main-nav a.active{background:var(--blue-soft);color:var(--blue)}
    .main-nav .nav-cta{background:var(--blue);color:#fff!important;border:1px solid var(--blue);box-shadow:0 7px 16px rgba(36,104,216,.2);padding:12px 19px;margin-left:8px}
    .main-nav .nav-cta:hover{background:var(--blue-dark);border-color:var(--blue-dark);transform:translateY(-2px)}
    .menu-toggle{display:none;background:var(--blue);color:#fff;border:0;padding:10px 14px;border-radius:8px;cursor:pointer}
    .page-hero{padding:58px 0 44px;background:#fbfdff;border-bottom:1px solid var(--line);position:relative;overflow:hidden}
    .page-hero:after{content:"";position:absolute;right:8%;top:30px;width:210px;height:150px;background-image:radial-gradient(#b9d2f1 1px,transparent 1px);background-size:14px 14px;opacity:.7}
    .breadcrumb{font-size:13px;color:var(--muted);margin-bottom:24px}
    .breadcrumb a{color:var(--blue)}
    .hero-layout{display:grid;grid-template-columns:5fr 7fr;gap:46px;align-items:center}
    .eyebrow,.section-kicker{display:inline-flex;align-items:center;gap:8px;color:var(--blue);font-size:13px;font-weight:800;letter-spacing:.08em}
    .eyebrow:before,.section-kicker:before{content:"";width:18px;height:4px;background:var(--yellow);box-shadow:7px 0 0 var(--cyan)}
    h1,h2,h3{line-height:1.25;letter-spacing:-.035em}
    h1{font-size:clamp(32px,4vw,54px);margin:15px 0 17px;max-width:570px}
    .hero-copy{color:var(--muted);font-size:17px;max-width:560px;margin:0 0 25px}
    .button{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:12px 22px;border-radius:9px;font-weight:800;border:1px solid var(--line);margin:0 10px 10px 0;transition:.25s ease}
    .button.primary{background:var(--blue);color:#fff;border-color:var(--blue);box-shadow:0 7px 16px rgba(36,104,216,.2)}
    .button.primary:hover{background:var(--blue-dark);border-color:var(--blue-dark);transform:translateY(-2px)}
    .button.secondary{background:#fff;color:var(--blue);border-color:#a9c7ec}
    .button.secondary:hover{background:var(--blue-soft);border-color:var(--blue);transform:translateY(-2px)}
    .hero-notes{display:flex;flex-wrap:wrap;gap:10px;margin-top:10px}
    .badge{display:inline-flex;align-items:center;padding:5px 10px;border-radius:5px;background:var(--blue-soft);color:var(--blue-dark);font-size:12px;font-weight:700}
    .badge.yellow{background:#fff5d8;color:#8a6510}
    .index-board{background:var(--paper);border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);padding:23px;transform:rotate(1.5deg)}
    .board-top{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line);padding-bottom:15px;margin-bottom:3px}
    .board-title{font-size:18px;font-weight:800}
    .status{font-size:12px;color:#21836d;background:#e7f8f1;padding:5px 9px;border-radius:5px;font-weight:800}
    .index-line{display:grid;grid-template-columns:42px 1fr auto;gap:12px;align-items:center;padding:17px 0;border-bottom:1px solid var(--line)}
    .index-line:last-child{border-bottom:0}
    .index-num{width:32px;height:32px;background:var(--blue-soft);color:var(--blue);display:grid;place-items:center;font-weight:800}
    .line-title{font-weight:800;font-size:14px}
    .line-desc{color:var(--muted);font-size:12px}
    .line-tag{font-size:11px;color:var(--blue-dark);background:#f1f6fc;padding:4px 7px;border-radius:4px}
    section{padding:82px 0}
    .section-head{display:flex;justify-content:space-between;align-items:end;gap:30px;margin-bottom:30px}
    .section-head h2{font-size:clamp(28px,3vw,40px);margin:10px 0 0}
    .section-desc{max-width:540px;color:var(--muted);margin:0}
    .filter-panel{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:20px;margin-bottom:28px}
    .filter-row{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
    .filter-label{font-weight:800;font-size:14px;margin-right:4px}
    .filter-button{border:1px solid #b8cce5;background:#fff;color:#526b86;border-radius:7px;padding:9px 16px;cursor:pointer;font-weight:700;transition:.2s}
    .filter-button:hover,.filter-button.active{background:var(--blue);border-color:var(--blue);color:#fff}
    .sort-select{margin-left:auto;width:150px;height:42px;border:1px solid var(--line);border-radius:7px;color:var(--ink);background:#fff;padding:0 10px}
    .content-layout{display:grid;grid-template-columns:230px 1fr;gap:25px;align-items:start}
    .side-index{background:#eef5fd;border:1px solid #d4e4f5;border-radius:var(--radius);padding:22px;position:sticky;top:104px}
    .side-index h3{font-size:18px;margin:0 0 15px}
    .side-index a{display:flex;justify-content:space-between;align-items:center;padding:11px 0;border-bottom:1px solid #d7e5f3;color:#55708d;font-size:14px;font-weight:700}
    .side-index a:last-child{border-bottom:0}
    .side-index a:hover,.side-index a.current{color:var(--blue)}
    .count{font-size:11px;color:var(--muted);font-weight:600}
    .content-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
    .content-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:.25s}
    .content-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:#a9c7ec}
    .cover{height:142px;background:linear-gradient(135deg,#dcecff 0%,#9fc7ef 100%);position:relative;display:flex;align-items:flex-end;padding:15px}
    .cover:before{content:"";position:absolute;inset:14px;border:1px solid rgba(255,255,255,.72);background-image:linear-gradient(90deg,transparent 48%,rgba(255,255,255,.28) 49%,transparent 50%),linear-gradient(transparent 48%,rgba(255,255,255,.28) 49%,transparent 50%);background-size:18px 18px}
    .cover strong{position:relative;color:#164a9d;font-size:14px;background:rgba(255,255,255,.82);padding:5px 9px;border-radius:4px}
    .card-body{padding:20px}
    .card-meta{display:flex;justify-content:space-between;gap:8px;color:var(--muted);font-size:12px}
    .content-card h3{font-size:19px;margin:11px 0 8px}
    .content-card p{font-size:14px;color:var(--muted);margin:0 0 15px}
    .card-link{font-size:13px;font-weight:800}
    .notice{margin-top:32px;padding:18px 20px;background:#fff9e8;border:1px solid #f1dda1;border-left:4px solid var(--yellow);border-radius:10px;color:#715b25;font-size:14px}
    .guide-section{background:#f9fbfe}
    .guide-grid{display:grid;grid-template-columns:1fr 1.4fr;gap:28px;align-items:stretch}
    .guide-copy,.guide-steps{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:28px}
    .guide-copy h2{font-size:30px;margin:12px 0}
    .guide-copy p{color:var(--muted)}
    .step{display:grid;grid-template-columns:42px 1fr;gap:16px;padding:14px 0;border-bottom:1px solid var(--line)}
    .step:last-child{border-bottom:0}
    .step-number{width:34px;height:34px;background:var(--blue);color:#fff;display:grid;place-items:center;font-weight:800}
    .step h3{font-size:17px;margin:0 0 3px}
    .step p{margin:0;color:var(--muted);font-size:14px}
    .faq-section{background:#f9fbfe}
    .faq-wrap{max-width:900px;margin:0 auto;background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:8px 25px}
    .accordion-item{border-bottom:1px solid var(--line)}
    .accordion-item:last-child{border-bottom:0}
    .accordion-title{display:block;padding:19px 8px;color:var(--ink);font-weight:800;position:relative}
    .accordion-title:after{content:"+";position:absolute;right:8px;color:var(--blue);font-size:22px}
    .accordion-content{padding:0 36px 18px 8px;color:var(--muted);font-size:14px}
    .accordion-item.is-open .accordion-title{color:var(--blue)}
    .accordion-item.is-open .accordion-title:after{content:"−"}
    .cta-section{padding:65px 0}
    .cta-box{background:var(--blue-soft);border:1px solid #c9def5;border-radius:var(--radius);padding:38px 42px;display:flex;align-items:center;justify-content:space-between;gap:25px}
    .cta-box h2{margin:0 0 8px;font-size:30px}
    .cta-box p{color:var(--muted);margin:0}
    footer{background:#edf3fa;border-top:1px solid var(--line);padding:48px 0 24px}
    .footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:40px}
    .footer-brand p{color:var(--muted);font-size:13px;max-width:330px;margin-top:16px}
    .footer-title{font-weight:800;margin-bottom:12px}
    .footer-links{display:grid;gap:8px}
    .footer-links a{color:#60758b;font-size:13px}
    .footer-links a:hover{color:var(--blue)}
    .copyright{display:flex;justify-content:space-between;gap:15px;border-top:1px solid var(--line);margin-top:35px;padding-top:19px;color:#8191a3;font-size:12px}
    @media(max-width:900px){
      .main-nav a{padding:9px 8px;font-size:13px}
      .hero-layout{gap:28px}
      .content-layout{grid-template-columns:190px 1fr}
      .sort-select{margin-left:0}
    }
    @media(max-width:767px){
      .container{padding:0 18px}
      .topbar{min-height:68px}
      .brand-name{font-size:15px}
      .menu-toggle{display:block}
      .main-nav{display:none;position:absolute;left:18px;right:18px;top:74px;background:#fff;border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow);padding:10px;flex-direction:column;align-items:stretch}
      .main-nav.open{display:flex}
      .main-nav a{padding:13px 14px}
      .main-nav .nav-cta{margin:5px 0 0;text-align:center}
      .page-hero{padding:40px 0 34px}
      .hero-layout,.content-layout,.guide-grid{grid-template-columns:1fr}
      .index-board{transform:none;margin-top:14px}
      section{padding:62px 0}
      .section-head{display:block}
      .section-desc{margin-top:14px}
      .side-index{position:static}
      .content-grid{grid-template-columns:1fr}
      .filter-row{align-items:stretch}
      .filter-button{flex:1 1 auto}
      .sort-select{width:100%;margin-top:4px}
      .cta-box{display:block;padding:30px 24px}
      .cta-box .button{margin-top:20px}
      .footer-grid{grid-template-columns:1fr;gap:24px}
      .copyright{display:block}
      .copyright span{display:block;margin-top:6px}
    }
    @media(max-width:520px){
      h1{font-size:34px}
      .hero-copy{font-size:16px}
      .filter-button{width:calc(50% - 6px);flex:none}
      .index-line{grid-template-columns:34px 1fr}
      .line-tag{grid-column:2;justify-self:start}
    }