/* roulang page: index */
:root{
      --blue:#2563eb;--blue-dark:#1746a2;--blue-soft:#eaf2ff;--ink:#16243d;
      --muted:#68758b;--line:#dce5f2;--warm:#f59e70;--paper:#fbfdff;
      --shadow:0 18px 48px rgba(28,64,120,.10);--small-shadow:0 8px 24px rgba(28,64,120,.08);
      --radius:20px
    }
    *,*:before,*:after{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:var(--paper);color:var(--ink);font-family:"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",Arial,sans-serif;line-height:1.75}
    a{color:inherit;text-decoration:none;transition:.25s ease}
    img{max-width:100%;display:block}
    button,input{font:inherit}
    button{cursor:pointer}
    .container{width:min(1180px,calc(100% - 40px));margin:0 auto}
    .site-header{position:absolute;top:0;left:0;right:0;z-index:20;padding:18px 0}
    .site-header.scrolled{position:fixed;background:rgba(255,255,255,.92);backdrop-filter:blur(18px);box-shadow:0 8px 28px rgba(22,55,105,.09);border-bottom:1px solid var(--line)}
    .nav-shell{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:11px 16px;border:1px solid rgba(255,255,255,.7);background:rgba(255,255,255,.64);backdrop-filter:blur(18px);border-radius:16px;box-shadow:var(--small-shadow)}
    .scrolled .nav-shell{background:transparent;border-color:transparent;box-shadow:none}
    .logo{font-weight:800;letter-spacing:-.04em;color:var(--blue-dark);font-size:16px;white-space:nowrap}
    .logo-mark{display:inline-grid;place-items:center;width:30px;height:30px;margin-right:8px;border-radius:10px;background:var(--blue);color:#fff;font-size:14px}
    .nav-links{display:flex;align-items:center;gap:5px;margin-left:auto}
    .nav-links a{padding:8px 13px;border-radius:10px;color:#52627b;font-size:14px}
    .nav-links a:hover,.nav-links a.active{background:var(--blue-soft);color:var(--blue-dark)}
    .search-box{display:flex;align-items:center;gap:8px;border:1px solid var(--line);background:#fff;border-radius:11px;padding:7px 11px;color:var(--muted)}
    .search-box input{width:92px;border:0;outline:0;background:transparent;font-size:13px}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:7px;min-height:44px;padding:10px 18px;border-radius:11px;border:1px solid transparent;font-weight:700;font-size:14px;transition:.25s ease}
    .btn-primary{background:var(--blue);color:#fff;box-shadow:0 8px 18px rgba(37,99,235,.22)}
    .btn-primary:hover{background:var(--blue-dark);transform:translateY(-2px);box-shadow:0 12px 24px rgba(37,99,235,.28)}
    .btn-primary:active{transform:none;box-shadow:none}
    .btn-light{background:#fff;color:var(--blue-dark);border-color:var(--line)}
    .btn-light:hover{border-color:#a9c5f6;background:var(--blue-soft)}
    .btn:focus-visible,.faq-question:focus-visible,input:focus-visible{outline:3px solid rgba(37,99,235,.28);outline-offset:3px}
    .mobile-toggle{display:none;background:none;border:0;color:var(--ink);font-size:24px}
    .hero{position:relative;overflow:hidden;padding:164px 0 92px;background:linear-gradient(135deg,#f3f8ff 0%,#fff 58%,#fff8f3 100%)}
    .hero:before,.hero:after{content:"";position:absolute;border-radius:50%;pointer-events:none}
    .hero:before{width:420px;height:420px;right:-130px;top:50px;background:rgba(160,202,255,.22);filter:blur(4px)}
    .hero:after{width:180px;height:180px;left:-60px;bottom:20px;background:rgba(255,190,154,.18)}
    .hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:1.02fr .98fr;gap:70px;align-items:center}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--blue-dark);background:#e9f2ff;border:1px solid #cfe0fb;border-radius:999px;padding:6px 12px;font-size:13px;font-weight:700}
    .eyebrow i{width:7px;height:7px;border-radius:50%;background:var(--warm)}
    h1,h2,h3{margin:0;letter-spacing:-.045em;line-height:1.22}
    h1{font-size:clamp(38px,5vw,68px);max-width:700px;margin:20px 0 20px}
    h2{font-size:clamp(27px,3vw,42px)}
    h3{font-size:20px}
    .hero-copy{font-size:17px;color:var(--muted);max-width:620px}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin:29px 0 25px}
    .hero-notes{display:flex;flex-wrap:wrap;gap:18px;color:#718099;font-size:13px}
    .hero-notes span:before{content:"✓";color:var(--blue);font-weight:800;margin-right:6px}
    .preview-stage{position:relative;padding:22px;border:1px solid #d7e5f8;background:rgba(255,255,255,.78);border-radius:28px;box-shadow:var(--shadow);transform:rotate(1.5deg)}
    .preview-top{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line);padding-bottom:16px;margin-bottom:17px}
    .preview-title{font-weight:800}.tiny-label{color:var(--muted);font-size:12px}
    .preview-list{display:grid;gap:11px}
    .preview-item{display:flex;gap:13px;align-items:center;padding:14px;border:1px solid #e7edf6;border-radius:15px;background:#fff}
    .preview-number{display:grid;place-items:center;width:35px;height:35px;border-radius:10px;background:var(--blue-soft);color:var(--blue);font-weight:800}
    .preview-item strong{display:block;font-size:14px}.preview-item small{color:var(--muted);font-size:12px}
    .float-sticker{position:absolute;right:-25px;top:-25px;display:grid;place-items:center;width:82px;height:82px;border-radius:50%;background:var(--warm);color:#fff;text-align:center;font-weight:800;font-size:13px;line-height:1.3;box-shadow:0 10px 25px rgba(245,144,98,.27);transform:rotate(10deg)}
    .section{padding:94px 0}.section-soft{background:#f4f8fd}.section-head{display:flex;justify-content:space-between;align-items:end;gap:30px;margin-bottom:38px}.section-head p{max-width:520px;color:var(--muted);margin:0}
    .benefit-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:22px}.benefit-main,.benefit-side,.price-card,.quote-card,.info-list,.open-panel,.faq-wrap{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--small-shadow)}
    .benefit-main{padding:34px;min-height:275px;background:linear-gradient(145deg,#fff,#eef5ff)}
    .benefit-main p,.benefit-side p,.price-card p,.quote-card p{color:var(--muted);font-size:14px}
    .benefit-side{padding:28px}.benefit-side+.benefit-side{margin-top:22px}
    .tag-row{display:flex;gap:8px;flex-wrap:wrap;margin-top:20px}.tag{display:inline-flex;padding:5px 10px;border-radius:8px;background:#f0f5fb;color:#5e708d;font-size:12px}.tag.blue{background:var(--blue-soft);color:var(--blue-dark)}.tag.warm{background:#fff1e9;color:#b8613c}
    .price-layout{display:grid;grid-template-columns:.75fr 1.25fr;gap:28px;align-items:stretch}.price-intro{padding:28px 0}.price-table{overflow:hidden;border:1px solid var(--line);border-radius:var(--radius);background:#fff;box-shadow:var(--small-shadow)}.price-row{display:grid;grid-template-columns:1.1fr 1fr 1fr;align-items:center;padding:20px 24px;border-bottom:1px solid var(--line);font-size:14px}.price-row:last-child{border:0}.price-row:first-child{background:#f1f6ff;color:var(--blue-dark);font-weight:800}.price-row strong{font-size:21px}.yes{color:#27865e;font-weight:800}.no{color:#a0aabc}
    .news-layout{display:grid;grid-template-columns:1.25fr .75fr;gap:26px}.info-list{overflow:hidden}.info-entry{display:flex;align-items:center;justify-content:space-between;gap:15px;padding:20px 24px;border-bottom:1px solid var(--line)}.info-entry:last-child{border-bottom:0}.info-entry:hover{background:#f7faff}.info-entry strong{font-size:15px}.info-entry span{color:var(--muted);font-size:12px;white-space:nowrap}.feature-note{padding:30px;border-radius:var(--radius);background:var(--blue-dark);color:#fff;min-height:100%;position:relative;overflow:hidden}.feature-note:after{content:"91";position:absolute;right:-10px;bottom:-45px;font-size:180px;font-weight:900;color:rgba(255,255,255,.08)}.feature-note p{color:#d7e5ff;font-size:14px;position:relative;z-index:1}.feature-note .tag{background:rgba(255,255,255,.13);color:#fff;position:relative;z-index:1}
    .open-panel{display:grid;grid-template-columns:1fr auto;align-items:center;gap:30px;padding:38px;background:#eef5ff}.open-panel p{color:var(--muted);max-width:680px;margin:12px 0 0}.open-actions{display:flex;gap:10px;flex-wrap:wrap}
    .quotes{display:grid;grid-template-columns:1fr 1.15fr  .85fr;gap:18px}.quote-card{padding:25px}.quote-card:nth-child(2){background:#fff8f3;transform:translateY(18px)}.quote-mark{font-size:38px;color:var(--blue);line-height:1}
    .faq-wrap{padding:12px 28px}.faq-item{border-bottom:1px solid var(--line)}.faq-item:last-child{border:0}.faq-question{display:flex;justify-content:space-between;align-items:center;width:100%;padding:21px 0;border:0;background:none;text-align:left;color:var(--ink);font-weight:700}.faq-question span{font-size:22px;color:var(--blue);transition:.25s}.faq-answer{display:none;color:var(--muted);font-size:14px;padding:0 35px 20px 0}.faq-item.open .faq-answer{display:block}.faq-item.open .faq-question span{transform:rotate(45deg)}
    .cta-band{padding:55px 0;background:#eaf2ff}.cta-inner{display:flex;justify-content:space-between;align-items:center;gap:25px}.cta-inner p{color:var(--muted);margin:10px 0 0}.footer{padding:54px 0 25px;background:#14233c;color:#dbe6f7}.footer-grid{display:grid;grid-template-columns:1.4fr .7fr .7fr 1fr;gap:35px;padding-bottom:38px;border-bottom:1px solid rgba(255,255,255,.14)}.footer .logo{color:#fff}.footer p,.footer a{color:#9eafc8;font-size:13px}.footer a:hover{color:#fff}.footer h3{font-size:14px;color:#fff;margin-bottom:12px}.footer-links{display:grid;gap:7px}.copyright{display:flex;justify-content:space-between;gap:20px;padding-top:22px;color:#91a2bd;font-size:12px}
    @media(max-width:1024px){.hero-grid{gap:35px}.nav-links{gap:0}.search-box{display:none}.footer-grid{grid-template-columns:1.2fr 1fr 1fr}}
    @media(max-width:768px){.container{width:min(100% - 28px,620px)}.site-header{padding:12px 0}.nav-shell{padding:10px 12px}.mobile-toggle{display:block}.nav-links{display:none;position:absolute;top:68px;left:14px;right:14px;padding:12px;background:#fff;border:1px solid var(--line);border-radius:15px;box-shadow:var(--shadow);flex-direction:column;align-items:stretch}.nav-links.show{display:flex}.nav-links a{padding:11px 13px}.nav-shell>.btn{display:none}.hero{padding:130px 0 65px}.hero-grid,.benefit-grid,.price-layout,.news-layout{grid-template-columns:1fr}.hero-copy{font-size:15px}.preview-stage{margin:12px 8px 0}.section{padding:65px 0}.section-head{display:block;margin-bottom:25px}.section-head p{margin-top:12px}.quotes{grid-template-columns:1fr}.quote-card:nth-child(2){transform:none}.open-panel,.cta-inner{display:block}.open-actions{margin-top:22px}.footer-grid{grid-template-columns:1fr 1fr}.copyright{display:block}.copyright span{display:block;margin-top:7px}}
    @media(max-width:520px){h1{font-size:38px}.hero-actions .btn{width:100%}.footer-grid{grid-template-columns:1fr}.price-row{grid-template-columns:1.15fr .9fr .9fr;padding:17px 14px;font-size:12px}.price-row strong{font-size:17px}.float-sticker{right:-5px;top:-28px;width:70px;height:70px}.preview-stage{padding:16px}.info-entry{padding:17px 15px}.info-entry strong{font-size:13px}}
    @media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}

/* roulang page: category1 */
:root{
      --blue:#2563eb;--blue-dark:#1746a2;--blue-soft:#eaf2ff;--ink:#16243d;
      --muted:#68758b;--line:#dce5f2;--warm:#f59f73;--paper:#fbfdff;
      --shadow:0 18px 48px rgba(28,64,120,.10);--small-shadow:0 8px 24px rgba(28,64,120,.08);
      --radius:20px;
    }
    *,*::before,*::after{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:var(--paper);color:var(--ink);font-family:"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",Arial,sans-serif;line-height:1.75}
    a{color:inherit;text-decoration:none;transition:.25s ease}
    img{max-width:100%;display:block}
    button,input{font:inherit}
    button{cursor:pointer}
    .container{width:min(1180px,calc(100% - 40px));margin:0 auto}
    .site-header{position:absolute;top:0;left:0;right:0;z-index:20;padding:18px 0}
    .site-header.scrolled{position:fixed;background:rgba(255,255,255,.94);backdrop-filter:blur(18px);box-shadow:0 8px 28px rgba(22,55,105,.09);border-bottom:1px solid var(--line)}
    .nav-shell{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:11px 16px;border:1px solid rgba(255,255,255,.7);background:rgba(255,255,255,.68);backdrop-filter:blur(18px);border-radius:16px;box-shadow:var(--small-shadow)}
    .scrolled .nav-shell{background:transparent;border-color:transparent;box-shadow:none}
    .logo{font-weight:800;letter-spacing:-.04em;color:var(--blue-dark);font-size:16px;white-space:nowrap}
    .logo-mark{display:inline-grid;place-items:center;width:30px;height:30px;margin-right:8px;border-radius:10px;background:var(--blue);color:#fff;font-size:14px}
    .nav-links{display:flex;align-items:center;gap:5px;margin-left:auto}
    .nav-links a{padding:8px 13px;border-radius:10px;color:#52627b;font-size:14px}
    .nav-links a:hover,.nav-links a.active{background:var(--blue-soft);color:var(--blue-dark)}
    .search-box{display:flex;align-items:center;gap:8px;border:1px solid var(--line);background:#fff;border-radius:11px;padding:7px 11px;color:var(--muted)}
    .search-box input{width:92px;border:0;outline:0;background:transparent;font-size:13px}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:7px;min-height:44px;padding:10px 18px;border-radius:11px;border:1px solid transparent;font-weight:700;font-size:14px;transition:.25s ease}
    .btn-primary{background:var(--blue);color:#fff;box-shadow:0 8px 18px rgba(37,99,235,.22)}
    .btn-primary:hover{background:var(--blue-dark);transform:translateY(-2px);box-shadow:0 12px 24px rgba(37,99,235,.28)}
    .btn-primary:active{transform:none;box-shadow:none}
    .btn-light{background:#fff;color:var(--blue-dark);border-color:var(--line)}
    .btn-light:hover{border-color:#a9c5f6;background:var(--blue-soft)}
    .btn:focus-visible,.faq-question:focus-visible,input:focus-visible{outline:3px solid rgba(37,99,235,.28);outline-offset:3px}
    .mobile-toggle{display:none;background:none;border:0;color:var(--ink);font-size:24px}
    .page-hero{padding:154px 0 70px;background:linear-gradient(135deg,#f3f8ff 0%,#fff 64%,#fff8f3 100%);border-bottom:1px solid #edf2f8}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--blue-dark);background:#e9f2ff;border:1px solid #cfe0fb;border-radius:999px;padding:6px 12px;font-size:13px;font-weight:700}
    .eyebrow i{width:7px;height:7px;border-radius:50%;background:var(--warm)}
    .hero-layout{display:grid;grid-template-columns:1fr .78fr;gap:72px;align-items:end}
    .hero-copy{max-width:680px;color:var(--muted);font-size:17px}
    .hero-card{padding:25px;border:1px solid #d7e5f8;background:rgba(255,255,255,.8);border-radius:24px;box-shadow:var(--shadow);transform:rotate(1deg)}
    .mini-row{display:flex;align-items:center;justify-content:space-between;padding:14px 0;border-bottom:1px solid var(--line);font-size:14px}
    .mini-row:last-child{border-bottom:0}
    .mini-icon{width:34px;height:34px;display:grid;place-items:center;border-radius:11px;background:var(--blue-soft);color:var(--blue);font-weight:800}
    .section{padding:82px 0}
    .section-soft{background:#f4f8fd}
    .section-head{display:flex;justify-content:space-between;align-items:end;gap:30px;margin-bottom:30px}
    .section-head p{max-width:540px;color:var(--muted);margin:0}
    .filter-bar{display:flex;align-items:center;gap:12px;flex-wrap:wrap;padding:15px;border:1px solid var(--line);background:#fff;border-radius:16px;box-shadow:var(--small-shadow)}
    .filter-label{font-weight:800;font-size:14px;color:var(--blue-dark);margin-right:5px}
    .filter-button{padding:8px 13px;border:1px solid var(--line);border-radius:9px;background:#fff;color:#60718b;font-size:13px}
    .filter-button:hover,.filter-button.active{background:var(--blue-soft);border-color:#b7cef5;color:var(--blue-dark)}
    .browse-layout{display:grid;grid-template-columns:210px 1fr;gap:30px}
    .side-index{align-self:start;position:sticky;top:100px;padding:22px;border:1px solid var(--line);background:#fff;border-radius:18px;box-shadow:var(--small-shadow)}
    .side-index h3{font-size:15px;margin:0 0 13px}
    .index-link{display:block;padding:9px 10px;border-radius:9px;color:var(--muted);font-size:13px}
    .index-link:hover,.index-link.active{background:var(--blue-soft);color:var(--blue-dark);font-weight:700}
    .content-list{display:grid;gap:15px}
    .content-item{display:grid;grid-template-columns:92px 1fr auto;gap:20px;align-items:center;padding:20px;border:1px solid var(--line);background:#fff;border-radius:17px;box-shadow:var(--small-shadow);transition:.25s ease}
    .content-item:hover{transform:translateY(-3px);border-color:#b9cff2;box-shadow:var(--shadow)}
    .content-thumb{height:78px;border-radius:13px;background:linear-gradient(145deg,#dcecff,#f7fbff);display:grid;place-items:center;color:var(--blue);font-size:25px;font-weight:900}
    .content-item h3{margin:7px 0 3px;font-size:17px}
    .content-item p{margin:0;color:var(--muted);font-size:13px}
    .item-meta{color:#8a98aa;font-size:12px;white-space:nowrap}
    .tag-row{display:flex;gap:8px;flex-wrap:wrap}
    .tag{display:inline-flex;padding:5px 10px;border-radius:8px;background:#f0f5fb;color:#5e708d;font-size:12px}
    .tag.blue{background:var(--blue-soft);color:var(--blue-dark)}
    .tag.warm{background:#fff1e9;color:#b8613c}
    .notice-panel{display:grid;grid-template-columns:1.1fr .9fr;gap:25px;padding:30px;border-radius:20px;background:var(--blue-dark);color:#fff;overflow:hidden;position:relative}
    .notice-panel:after{content:"91";position:absolute;right:10px;bottom:-57px;font-size:190px;font-weight:900;color:rgba(255,255,255,.07)}
    .notice-panel p{color:#d8e6ff;font-size:14px;max-width:620px;position:relative;z-index:1}
    .notice-points{display:grid;grid-template-columns:1fr 1fr;gap:10px;position:relative;z-index:1}
    .notice-point{padding:13px;border:1px solid rgba(255,255,255,.16);border-radius:12px;background:rgba(255,255,255,.08);font-size:13px}
    .faq-wrap{padding:10px 28px;background:#fff;border:1px solid var(--line);border-radius:20px;box-shadow:var(--small-shadow)}
    .faq-item{border-bottom:1px solid var(--line)}
    .faq-item:last-child{border:0}
    .faq-question{display:flex;justify-content:space-between;align-items:center;width:100%;padding:20px 0;border:0;background:none;text-align:left;color:var(--ink);font-weight:700}
    .faq-question span{font-size:22px;color:var(--blue);transition:.25s}
    .faq-answer{display:none;color:var(--muted);font-size:14px;padding:0 35px 20px 0}
    .faq-item.open .faq-answer{display:block}
    .faq-item.open .faq-question span{transform:rotate(45deg)}
    .cta-panel{display:flex;justify-content:space-between;align-items:center;gap:25px;padding:34px 38px;background:#edf5ff;border:1px solid #d4e5fb;border-radius:22px}
    .cta-panel p{color:var(--muted);margin:7px 0 0;font-size:14px}
    .footer{padding:60px 0 24px;background:#f2f6fb;border-top:1px solid var(--line)}
    .footer-grid{display:grid;grid-template-columns:1.4fr .8fr .9fr 1fr;gap:38px}
    .footer h3{font-size:14px;margin:4px 0 14px}
    .footer p{color:var(--muted);font-size:13px;margin:0}
    .footer-links{display:grid;gap:8px;color:var(--muted);font-size:13px}
    .footer-links a:hover{color:var(--blue)}
    .copyright{display:flex;justify-content:space-between;gap:20px;margin-top:45px;padding-top:18px;border-top:1px solid var(--line);color:#8693a5;font-size:12px}
    @media(max-width:1024px){
      .hero-layout{gap:35px}.nav-links{margin-left:0}.search-box{display:none}
      .footer-grid{grid-template-columns:1.2fr 1fr 1fr}
      .footer-grid>div:last-child{grid-column:1/-1}
    }
    @media(max-width:768px){
      .container{width:min(100% - 28px,620px)}
      .site-header{padding:12px 0}.nav-shell{padding:9px 12px}
      .nav-links{display:none;position:absolute;left:14px;right:14px;top:67px;padding:10px;background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow);flex-direction:column;align-items:stretch}
      .nav-links.show{display:flex}.nav-links a{padding:11px 13px}
      .site-header .btn-primary{display:none}.mobile-toggle{display:block}
      .page-hero{padding:125px 0 55px}.hero-layout{grid-template-columns:1fr;gap:30px}
      .hero-card{transform:none}.section{padding:60px 0}.section-head{display:block}.section-head p{margin-top:10px}
      .browse-layout{grid-template-columns:1fr}.side-index{position:static;display:flex;gap:8px;overflow-x:auto;padding:10px}.side-index h3{display:none}.index-link{white-space:nowrap}
      .content-item{grid-template-columns:64px 1fr}.content-thumb{height:64px}.content-item .btn{grid-column:2;justify-self:start}.item-meta{white-space:normal}
      .notice-panel{grid-template-columns:1fr}.cta-panel{display:block;padding:28px}.cta-panel .hero-actions{margin-bottom:0}
      .footer-grid{grid-template-columns:1fr 1fr;gap:28px}.copyright{display:block}.copyright span{display:block;margin-top:6px}
    }
    @media(max-width:520px){
      h1{font-size:2.25rem!important;line-height:1.2}.notice-points{grid-template-columns:1fr}
      .footer-grid{grid-template-columns:1fr}.content-item{gap:12px;padding:15px}.content-item h3{font-size:15px}
      .filter-bar{align-items:flex-start}.filter-label{width:100%}
    }

/* roulang page: category2 */
:root{
      --blue:#2563eb;
      --blue-dark:#1746a2;
      --blue-soft:#eaf2ff;
      --ink:#16243d;
      --muted:#68758b;
      --line:#dce5f2;
      --warm:#f59e70;
      --paper:#fbfdff;
      --shadow:0 18px 48px rgba(28,64,120,.10);
      --small-shadow:0 8px 24px rgba(28,64,120,.08);
      --radius:20px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:var(--paper);color:var(--ink);font-family:"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",Arial,sans-serif;line-height:1.75}
    a{color:inherit;text-decoration:none;transition:.25s ease}
    img{max-width:100%;display:block}
    button,input{font:inherit}
    button{cursor:pointer}
    .container{width:min(1180px,calc(100% - 40px));margin:0 auto}
    .site-header{position:absolute;top:0;left:0;right:0;z-index:20;padding:18px 0}
    .site-header.scrolled{position:fixed;background:rgba(255,255,255,.94);backdrop-filter:blur(18px);box-shadow:0 8px 28px rgba(22,55,105,.09);border-bottom:1px solid var(--line)}
    .nav-shell{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:11px 16px;border:1px solid rgba(255,255,255,.7);background:rgba(255,255,255,.64);backdrop-filter:blur(18px);border-radius:16px;box-shadow:var(--small-shadow)}
    .scrolled .nav-shell{background:transparent;border-color:transparent;box-shadow:none}
    .logo{font-weight:800;letter-spacing:-.04em;color:var(--blue-dark);font-size:16px;white-space:nowrap}
    .logo-mark{display:inline-grid;place-items:center;width:30px;height:30px;margin-right:8px;border-radius:10px;background:var(--blue);color:#fff;font-size:14px}
    .nav-links{display:flex;align-items:center;gap:5px;margin-left:auto}
    .nav-links a{padding:8px 13px;border-radius:10px;color:#52627b;font-size:14px}
    .nav-links a:hover,.nav-links a.active{background:var(--blue-soft);color:var(--blue-dark)}
    .search-box{display:flex;align-items:center;gap:8px;border:1px solid var(--line);background:#fff;border-radius:11px;padding:7px 11px;color:var(--muted)}
    .search-box input{width:92px;border:0;outline:0;background:transparent;font-size:13px}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:7px;min-height:44px;padding:10px 18px;border-radius:11px;border:1px solid transparent;font-weight:700;font-size:14px;transition:.25s ease}
    .btn-primary{background:var(--blue);color:#fff;box-shadow:0 8px 18px rgba(37,99,235,.22)}
    .btn-primary:hover{background:var(--blue-dark);transform:translateY(-2px);box-shadow:0 12px 24px rgba(37,99,235,.28)}
    .btn-primary:active{transform:none;box-shadow:none}
    .btn-light{background:#fff;color:var(--blue-dark);border-color:var(--line)}
    .btn-light:hover{border-color:#a9c5f6;background:var(--blue-soft)}
    .btn:focus-visible,.faq-question:focus-visible,input:focus-visible{outline:3px solid rgba(37,99,235,.28);outline-offset:3px}
    .mobile-toggle{display:none;background:none;border:0;color:var(--ink);font-size:24px}
    .hero-inner{padding:156px 0 74px;background:linear-gradient(135deg,#f3f8ff 0%,#fff 58%,#fff8f3 100%)}
    .hero-copy{max-width:760px;margin:0 auto;text-align:center}
    .eyebrow,.tag{display:inline-flex;align-items:center;border-radius:999px;font-size:12px;font-weight:700}
    .eyebrow{gap:8px;color:var(--blue-dark);background:#e9f2ff;border:1px solid #cfe0fb;padding:6px 12px}
    .eyebrow i{width:7px;height:7px;border-radius:50%;background:var(--warm)}
    h1,h2,h3,p{margin-top:0}
    h1{font-size:clamp(36px,5vw,64px);line-height:1.16;letter-spacing:-.055em;margin:20px 0 18px}
    h2{font-size:clamp(26px,3vw,40px);line-height:1.25;letter-spacing:-.04em;margin-bottom:12px}
    h3{font-size:18px;line-height:1.4;margin-bottom:8px}
    .hero-copy p{max-width:650px;margin:0 auto;color:var(--muted);font-size:17px}
    .hero-actions{display:flex;justify-content:center;flex-wrap:wrap;gap:12px;margin:28px 0 24px}
    .hero-notes{display:flex;justify-content:center;flex-wrap:wrap;gap:18px;color:#718099;font-size:13px}
    .hero-notes span:before{content:"✓";color:var(--blue);font-weight:800;margin-right:6px}
    .preview-strip{display:grid;grid-template-columns:1.25fr .85fr .85fr;gap:16px;margin-top:48px}
    .preview-card{min-height:150px;padding:22px;border:1px solid #d7e5f8;border-radius:22px;background:rgba(255,255,255,.82);box-shadow:var(--small-shadow);text-align:left}
    .preview-card.featured{background:var(--blue-dark);color:#fff;transform:translateY(16px)}
    .preview-card.featured p{color:#d8e5ff}
    .preview-index{font-size:12px;color:var(--blue);font-weight:800;margin-bottom:22px}
    .featured .preview-index{color:#a9c9ff}
    .preview-card p{font-size:13px;color:var(--muted);margin-bottom:0}
    .tag{padding:5px 10px;background:#f0f5fb;color:#5e708d;margin-right:6px}
    .tag.blue{background:var(--blue-soft);color:var(--blue-dark)}
    .tag.warm{background:#fff1e9;color:#b8613c}
    .section{padding:88px 0}
    .section-soft{background:#f4f8fd}
    .section-head{display:flex;justify-content:space-between;align-items:end;gap:30px;margin-bottom:34px}
    .section-head p{max-width:520px;color:var(--muted);margin:0}
    .filter-bar{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:14px 16px;margin-bottom:28px;border:1px solid var(--line);border-radius:16px;background:#fff;box-shadow:var(--small-shadow)}
    .filter-tabs{display:flex;gap:8px;overflow:auto;white-space:nowrap}
    .filter-tabs a{padding:8px 13px;border-radius:9px;font-size:13px;color:var(--muted)}
    .filter-tabs a:hover,.filter-tabs a.active{background:var(--blue-soft);color:var(--blue-dark);font-weight:700}
    .sort-note{font-size:13px;color:var(--muted);white-space:nowrap}
    .content-layout{display:grid;grid-template-columns:1fr 260px;gap:24px}
    .topic-list{display:grid;gap:15px}
    .topic-card{display:grid;grid-template-columns:92px 1fr auto;align-items:center;gap:20px;padding:20px;border:1px solid var(--line);border-radius:18px;background:#fff;box-shadow:var(--small-shadow);transition:.25s ease}
    .topic-card:hover{transform:translateY(-3px);border-color:#a9c5f6;box-shadow:var(--shadow)}
    .topic-visual{height:78px;border-radius:14px;background:linear-gradient(145deg,#eaf2ff,#fff4ed);display:grid;place-items:center;color:var(--blue-dark);font-weight:900;font-size:25px}
    .topic-card p{font-size:13px;color:var(--muted);margin:7px 0 8px}
    .topic-meta{font-size:12px;color:#8491a4}
    .topic-card .btn{min-width:82px}
    .side-index{padding:22px;border:1px solid var(--line);border-radius:18px;background:#fff;box-shadow:var(--small-shadow);height:max-content;position:sticky;top:100px}
    .side-index h3{font-size:16px;margin-bottom:15px}
    .side-index a{display:block;padding:10px 0;border-bottom:1px solid #edf1f7;color:var(--muted);font-size:13px}
    .side-index a:last-child{border-bottom:0}
    .side-index a:hover{color:var(--blue)}
    .story-grid{display:grid;grid-template-columns:1fr 1.25fr;gap:26px;align-items:stretch}
    .story-panel{padding:32px;border-radius:var(--radius);background:var(--blue-dark);color:#fff;box-shadow:var(--shadow)}
    .story-panel p{color:#d8e5ff;font-size:14px}
    .story-panel .tag{background:rgba(255,255,255,.13);color:#fff}
    .story-points{display:grid;gap:12px}
    .story-point{display:flex;gap:14px;padding:17px;border:1px solid var(--line);border-radius:15px;background:#fff;box-shadow:var(--small-shadow)}
    .story-point b{display:grid;place-items:center;flex:none;width:30px;height:30px;border-radius:9px;background:var(--blue-soft);color:var(--blue-dark);font-size:13px}
    .story-point strong{display:block;font-size:14px}
    .story-point span{display:block;color:var(--muted);font-size:13px;margin-top:3px}
    .faq-wrap{padding:10px 28px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--small-shadow)}
    .faq-item{border-bottom:1px solid var(--line)}
    .faq-item:last-child{border:0}
    .faq-question{display:flex;justify-content:space-between;align-items:center;width:100%;padding:20px 0;border:0;background:none;text-align:left;color:var(--ink);font-weight:700}
    .faq-question span{font-size:22px;color:var(--blue);transition:.25s}
    .faq-answer{display:none;color:var(--muted);font-size:14px;padding:0 35px 20px 0}
    .faq-item.open .faq-answer{display:block}
    .faq-item.open .faq-question span{transform:rotate(45deg)}
    .cta{padding:40px 46px;border:1px solid #cfe0fb;border-radius:24px;background:#edf5ff;display:flex;align-items:center;justify-content:space-between;gap:30px}
    .cta p{color:var(--muted);margin:0;max-width:600px}
    .footer{padding:62px 0 24px;background:#f1f5fa;border-top:1px solid var(--line)}
    .footer-grid{display:grid;grid-template-columns:1.4fr .8fr .9fr 1fr;gap:38px}
    .footer p{font-size:13px;color:var(--muted)}
    .footer h3{font-size:14px;margin-bottom:13px}
    .footer-links{display:grid;gap:8px;color:var(--muted);font-size:13px}
    .footer-links a:hover{color:var(--blue)}
    .copyright{display:flex;justify-content:space-between;gap:20px;border-top:1px solid var(--line);margin-top:38px;padding-top:20px;color:#8793a5;font-size:12px}
    @media(max-width:1024px){
      .nav-shell{gap:12px}.search-box{display:none}
      .content-layout{grid-template-columns:1fr 220px}
    }
    @media(max-width:768px){
      .container{width:min(100% - 28px,620px)}
      .site-header{padding:12px 0}
      .nav-shell{padding:9px 12px}
      .nav-links{display:none;position:absolute;top:62px;left:0;right:0;padding:10px;background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow);flex-direction:column;align-items:stretch}
      .nav-links.open{display:flex}
      .nav-links a{padding:12px}
      .nav-shell>.btn{display:none}
      .mobile-toggle{display:block}
      .hero-inner{padding:126px 0 56px}
      .preview-strip{grid-template-columns:1fr;margin-top:34px}
      .preview-card.featured{transform:none}
      .section{padding:64px 0}
      .section-head,.cta{display:block}
      .section-head p{margin-top:12px}
      .cta .btn{margin-top:20px}
      .content-layout,.story-grid{grid-template-columns:1fr}
      .side-index{position:static}
      .topic-card{grid-template-columns:64px 1fr}
      .topic-card .btn{grid-column:2;justify-self:start}
      .topic-visual{height:64px}
      .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
      .copyright{display:block}.copyright span{display:block;margin-top:6px}
    }
    @media(max-width:520px){
      h1{font-size:36px}
      .hero-copy p{font-size:15px}
      .hero-actions .btn{width:100%}
      .filter-bar{display:block}
      .sort-note{display:block;margin-top:12px}
      .topic-card{gap:13px;padding:15px}
      .topic-card h3{font-size:16px}
      .footer-grid{grid-template-columns:1fr}
      .faq-wrap{padding:8px 18px}
    }