/* roulang page: index */
:root{
      --blue:#315fce;--blue-dark:#244ba8;--blue-soft:#eaf1ff;--ink:#18243a;
      --muted:#64728a;--paper:#f7f9fc;--white:#fff;--line:#e1e7f0;
      --coral:#ef8d72;--yellow:#f4ca67;--radius:18px;
      --shadow:0 14px 38px rgba(31,55,96,.08);--shadow-hover:0 20px 44px rgba(31,55,96,.14);
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth;scroll-padding-top:90px}
    body{margin:0;background:var(--paper);color:var(--ink);font-family:ui-sans-serif,system-ui,-apple-system,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;line-height:1.7}
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    button,input,textarea,select{font:inherit}
    button,a,input,textarea{ -webkit-tap-highlight-color:transparent}
    button{cursor:pointer}
    :focus-visible{outline:3px solid rgba(49,95,206,.45);outline-offset:3px}
    .container{width:min(1160px,calc(100% - 48px));margin-inline:auto}
    .pixel-mark{position:relative}
    .pixel-mark:after{content:"";position:absolute;width:9px;height:9px;right:-5px;top:-4px;background:var(--yellow);box-shadow:5px 5px 0 var(--coral)}
    .site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.94);border-bottom:1px solid rgba(225,231,240,.9);backdrop-filter:blur(14px)}
    .nav-wrap{height:76px;display:flex;align-items:center;justify-content:space-between;gap:28px}
    .brand{display:inline-flex;align-items:center;gap:12px;font-size:20px;font-weight:850;letter-spacing:-.04em;white-space:nowrap}
    .brand-icon{width:34px;height:34px;background:var(--blue);border-radius:9px;display:grid;place-items:center;color:white;box-shadow:4px 4px 0 #cad8fa}
    .brand-icon span{font-size:17px;line-height:1}
    .nav-links{display:flex;align-items:center;gap:30px;margin-left:auto}
    .nav-links a{font-size:14px;font-weight:650;color:#52617b;transition:color .2s}
    .nav-links a:hover,.nav-links a.active{color:var(--blue)}
    .nav-cta,.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;border:1px solid transparent;border-radius:11px;padding:11px 17px;font-size:14px;font-weight:750;transition:transform .2s,background .2s,box-shadow .2s,border-color .2s}
    .nav-cta,.btn-primary{background:var(--blue);color:white;box-shadow:0 7px 16px rgba(49,95,206,.18)}
    .nav-cta:hover,.btn-primary:hover{background:var(--blue-dark);transform:translateY(-2px);box-shadow:0 10px 22px rgba(49,95,206,.24)}
    .menu-toggle{display:none;border:1px solid var(--line);background:#fff;border-radius:10px;padding:9px 12px;color:var(--ink)}
    main{overflow:hidden}
    section{padding:86px 0;position:relative}
    .section-soft{background:#f0f5ff}
    .section-white{background:#fff}
    .section-head{display:flex;justify-content:space-between;align-items:flex-end;gap:30px;margin-bottom:34px}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--blue);font-size:12px;font-weight:800;letter-spacing:.09em;text-transform:uppercase}
    .eyebrow:before{content:"";width:17px;height:3px;background:var(--coral);border-radius:5px}
    h1,h2,h3,p{margin-top:0}
    h1{font-size:clamp(38px,5vw,64px);line-height:1.12;letter-spacing:-.055em;margin:17px 0 20px}
    h2{font-size:clamp(28px,3.3vw,40px);line-height:1.2;letter-spacing:-.04em;margin:12px 0 0}
    h3{line-height:1.35}
    .section-copy{max-width:660px;color:var(--muted);font-size:15px;margin:12px 0 0}
    .hero{padding:52px 0 74px;background:#f8faff}
    .hero-grid{display:grid;grid-template-columns:1.02fr .98fr;gap:52px;align-items:center}
    .hero-copy{padding:28px 0}
    .hero-copy>p{font-size:17px;color:#5b6980;max-width:610px;line-height:1.9;margin-bottom:26px}
    .hero-actions{display:flex;gap:12px;flex-wrap:wrap}
    .btn-secondary{background:#fff;border-color:#dce4f0;color:#35445e}
    .btn-secondary:hover{border-color:#9eb5eb;background:#f7f9ff;transform:translateY(-2px)}
    .hero-meta{display:flex;gap:10px;flex-wrap:wrap;margin-top:27px}
    .pill,.tag{display:inline-flex;align-items:center;gap:6px;padding:6px 10px;background:#fff;border:1px solid var(--line);border-radius:999px;color:#64728a;font-size:12px;font-weight:700}
    .pill-dot{width:7px;height:7px;border-radius:50%;background:#68b99a}
    .hero-art{position:relative;min-height:420px;border-radius:26px;overflow:hidden;background:#dce7f8;box-shadow:var(--shadow)}
    .hero-art img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
    .hero-art:after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(20,44,93,.18),rgba(20,44,93,.03) 55%,rgba(20,44,93,.28))}
    .art-note{position:absolute;z-index:2;left:24px;bottom:24px;background:rgba(255,255,255,.94);padding:15px 18px;border-radius:14px;box-shadow:var(--shadow);max-width:245px}
    .art-note strong{display:block;font-size:15px}
    .art-note span{font-size:12px;color:var(--muted)}
    .film-stamp{position:absolute;z-index:2;right:22px;top:22px;background:var(--yellow);padding:9px 13px;color:#443b27;font-size:12px;font-weight:850;transform:rotate(3deg);box-shadow:4px 4px 0 rgba(24,36,58,.12)}
    .matrix{display:grid;grid-template-columns:225px 1fr;gap:34px}
    .topic-index{border-left:2px solid #dfe7f5;padding-left:18px;display:flex;flex-direction:column;gap:13px}
    .topic-index a{color:#63728a;font-size:14px;font-weight:650;padding:7px 0;transition:color .2s,transform .2s}
    .topic-index a:hover{color:var(--blue);transform:translateX(3px)}
    .matrix-cards{display:grid;grid-template-columns:1.12fr .88fr;gap:17px}
    .feature-card,.mini-card,.data-panel,.topic-card,.news-item,.source-panel,.faq-item,.guard-card{
      background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);transition:transform .22s,box-shadow .22s,border-color .22s
    }
    .feature-card:hover,.mini-card:hover,.topic-card:hover,.news-item:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);border-color:#c9d6f1}
    .feature-card{grid-row:span 2;padding:27px;display:flex;flex-direction:column;justify-content:space-between;min-height:270px;overflow:hidden;position:relative}
    .feature-card:after{content:"";position:absolute;width:140px;height:140px;right:-35px;bottom:-50px;border:18px solid #eff4ff;border-radius:50%}
    .mini-card{padding:21px;min-height:126px;display:flex;gap:15px;align-items:flex-start}
    .pixel-icon{width:42px;height:42px;flex:none;display:grid;place-items:center;background:var(--blue-soft);color:var(--blue);border-radius:11px;font-weight:850;font-size:18px}
    .feature-card h3,.mini-card h3{margin:12px 0 7px;font-size:19px}
    .feature-card p,.mini-card p{color:var(--muted);font-size:13px;margin:0}
    .tag{background:#f6f8fc;border:0;border-radius:6px;font-size:11px;padding:5px 9px;color:#5f6e86}
    .data-panel{padding:28px 32px;display:grid;grid-template-columns:repeat(4,1fr);gap:0;background:#fff}
    .data-item{padding:10px 25px;border-right:1px solid var(--line)}
    .data-item:first-child{padding-left:0}.data-item:last-child{border:0}
    .data-value{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:31px;font-weight:850;letter-spacing:-.05em;color:var(--blue);line-height:1.2}
    .data-item strong{display:block;font-size:14px;margin-top:8px}
    .data-item span{font-size:12px;color:var(--muted)}
    .process{display:grid;grid-template-columns:repeat(4,1fr);gap:0;position:relative}
    .process:before{content:"";position:absolute;left:8%;right:8%;top:26px;height:2px;background:repeating-linear-gradient(90deg,#bac9e7 0 7px,transparent 7px 13px)}
    .step{position:relative;padding:0 22px 0 0}
    .step-num{position:relative;z-index:1;width:53px;height:53px;background:#fff;border:1px solid #d9e3f4;color:var(--blue);border-radius:14px;display:grid;place-items:center;font-family:ui-monospace,monospace;font-weight:850;box-shadow:0 4px 12px rgba(31,55,96,.06)}
    .step h3{font-size:16px;margin:18px 0 6px}
    .step p{font-size:13px;color:var(--muted);margin:0;max-width:210px}
    .topic-wall{display:grid;grid-template-columns:1.24fr .76fr .76fr;grid-template-rows:190px 190px;gap:16px}
    .topic-card{position:relative;overflow:hidden;padding:22px;display:flex;flex-direction:column;justify-content:flex-end;min-height:180px}
    .topic-card img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform .5s}
    .topic-card:hover img{transform:scale(1.04)}
    .topic-card:after{content:"";position:absolute;inset:0;background:linear-gradient(0deg,rgba(18,34,66,.82),rgba(18,34,66,.02) 80%)}
    .topic-card>*:not(img){position:relative;z-index:1;color:#fff}
    .topic-card:first-child{grid-row:span 2}
    .topic-card h3{font-size:20px;margin:8px 0 5px}
    .topic-card p{font-size:12px;color:rgba(255,255,255,.82);margin:0}
    .topic-card .tag{width:max-content;background:rgba(255,255,255,.9);color:#33435e}
    .topic-foot{font-size:11px!important;margin-top:10px!important;color:rgba(255,255,255,.78)!important}
    .news-layout{display:grid;grid-template-columns:205px 1fr;gap:45px}
    .news-aside{border-right:1px solid var(--line);padding-right:24px}
    .news-aside strong{font-size:13px;display:block;margin-bottom:12px}
    .news-aside p{font-size:13px;color:var(--muted);margin:0}
    .news-list{display:flex;flex-direction:column}
    .news-item{box-shadow:none;border:0;border-bottom:1px solid var(--line);border-radius:0;padding:17px 0;display:grid;grid-template-columns:92px 1fr 75px;gap:18px;align-items:center;background:transparent}
    .news-item:first-child{padding-top:0}
    .news-date{font-family:ui-monospace,monospace;color:#7a879a;font-size:12px}
    .news-item h3{font-size:15px;margin:0 0 5px}
    .news-item p{font-size:12px;color:var(--muted);margin:0}
    .read-link{font-size:12px;color:var(--blue);font-weight:750;white-space:nowrap}
    .source-strip{display:grid;grid-template-columns:1.1fr 1.9fr;gap:34px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:20px;padding:26px 30px;box-shadow:var(--shadow)}
    .source-strip h2{font-size:25px}
    .source-strip p{font-size:13px;color:var(--muted);margin:9px 0 0}
    .source-tags{display:flex;flex-wrap:wrap;gap:10px}
    .source-tags span{padding:10px 13px;border:1px dashed #cbd6e8;border-radius:9px;background:#f9fbff;color:#53627b;font-size:12px;font-weight:700}
    .faq-wrap{display:grid;grid-template-columns:.75fr 1.25fr;gap:55px}
    .faq-intro p{color:var(--muted);font-size:14px;max-width:300px;margin-top:14px}
    .faq-list{display:flex;flex-direction:column;gap:10px}
    .faq-item{box-shadow:none;border-radius:12px;overflow:hidden}
    .faq-question{width:100%;display:flex;justify-content:space-between;gap:20px;text-align:left;border:0;background:#fff;padding:17px 19px;color:var(--ink);font-size:14px;font-weight:750}
    .faq-question:hover{color:var(--blue)}
    .faq-symbol{width:24px;height:24px;border-radius:7px;background:var(--blue-soft);color:var(--blue);display:grid;place-items:center;flex:none;font-size:18px;line-height:1;transition:transform .2s}
    .faq-answer{display:none;padding:0 19px 17px;color:var(--muted);font-size:13px}
    .faq-item.open .faq-answer{display:block}
    .faq-item.open .faq-symbol{transform:rotate(45deg)}
    .guard-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .guard-card{box-shadow:none;padding:20px 17px;display:flex;align-items:flex-start;gap:12px}
    .guard-mark{width:30px;height:30px;flex:none;display:grid;place-items:center;background:#edf7f2;color:#398d69;border-radius:9px;font-weight:900}
    .guard-card strong{font-size:13px;display:block}
    .guard-card span{font-size:12px;color:var(--muted);display:block;margin-top:4px}
    .cta-panel{background:#eaf1ff;border:1px solid #d7e3fb;border-radius:24px;padding:38px;display:grid;grid-template-columns:1fr 1fr;gap:38px;align-items:center;position:relative;overflow:hidden}
    .cta-panel:after{content:"";position:absolute;right:-70px;top:-90px;width:230px;height:230px;border:28px solid rgba(49,95,206,.06);border-radius:50%}
    .cta-panel h2{font-size:32px}
    .cta-panel p{color:#5d6c85;font-size:14px;margin:12px 0 0;max-width:480px}
    .feedback-form{position:relative;z-index:1;display:flex;gap:9px;flex-wrap:wrap}
    .feedback-form input{flex:1;min-width:180px;padding:12px 14px;background:#fff;border:1px solid #cfdaed;border-radius:10px;color:var(--ink);font-size:13px}
    .feedback-form input:focus{outline:3px solid rgba(49,95,206,.17);border-color:var(--blue)}
    .feedback-form button{border:0;border-radius:10px;background:var(--blue);color:#fff;padding:12px 17px;font-size:13px;font-weight:750;transition:background .2s,transform .2s}
    .feedback-form button:hover{background:var(--blue-dark);transform:translateY(-1px)}
    .form-message{width:100%;font-size:12px;color:#4a6b58;margin:0;display:none}
    .site-footer{background:#17243b;color:#fff;padding:42px 0 24px}
    .footer-top{display:flex;justify-content:space-between;gap:30px;align-items:flex-start;padding-bottom:31px;border-bottom:1px solid rgba(255,255,255,.13)}
    .footer-brand p{font-size:12px;color:#aeb9cc;max-width:330px;margin:13px 0 0}
    .footer-links{display:flex;gap:26px;flex-wrap:wrap}
    .footer-links a{font-size:12px;color:#d0d8e5;transition:color .2s}
    .footer-links a:hover{color:#fff}
    .footer-bottom{padding-top:19px;display:flex;justify-content:space-between;gap:16px;color:#9eabc0;font-size:11px}
    .pixel-dots{background-image:radial-gradient(#d5e0f3 1px,transparent 1px);background-size:16px 16px}
    @media(max-width:1024px){
      .hero-grid{gap:32px}.matrix{grid-template-columns:180px 1fr}
      .topic-wall{grid-template-columns:1fr 1fr;grid-template-rows:220px 180px}
      .topic-card:first-child{grid-row:span 2}
      .guard-grid{grid-template-columns:repeat(2,1fr)}
    }
    @media(max-width:768px){
      .container{width:min(100% - 36px,620px)}
      .nav-wrap{height:68px}.menu-toggle{display:inline-flex;align-items:center;gap:8px}
      .nav-cta{display:none}
      .nav-links{display:none;position:absolute;top:68px;left:0;right:0;padding:12px 20px 20px;background:#fff;border-bottom:1px solid var(--line);box-shadow:0 15px 24px rgba(31,55,96,.08);flex-direction:column;align-items:stretch;gap:0}
      .nav-links.open{display:flex}
      .nav-links a{padding:12px 8px;border-bottom:1px solid #f0f2f6}
      section{padding:65px 0}
      .hero{padding:32px 0 55px}
      .hero-grid{grid-template-columns:1fr;gap:28px}
      .hero-copy{padding:16px 0 0}
      .hero-art{min-height:340px}
      .section-head{align-items:flex-start;flex-direction:column;gap:12px}
      .matrix{grid-template-columns:1fr;gap:20px}
      .topic-index{flex-direction:row;overflow-x:auto;border-left:0;border-bottom:1px solid #dfe7f5;padding:0 0 9px;gap:22px;white-space:nowrap}
      .matrix-cards{grid-template-columns:1fr 1fr}
      .feature-card{grid-row:auto;grid-column:span 2;min-height:220px}
      .data-panel{grid-template-columns:1fr 1fr;padding:20px}
      .data-item{padding:15px;border-right:0;border-bottom:1px solid var(--line)}
      .data-item:nth-child(odd){border-right:1px solid var(--line)}
      .data-item:first-child{padding-left:15px}
      .data-item:nth-last-child(-n+2){border-bottom:0}
      .process{grid-template-columns:1fr 1fr;gap:26px 18px}
      .process:before{display:none}
      .topic-wall{grid-template-columns:1fr 1fr;grid-template-rows:220px 180px}
      .news-layout{grid-template-columns:1fr;gap:20px}
      .news-aside{border-right:0;border-bottom:1px solid var(--line);padding:0 0 15px}
      .source-strip{grid-template-columns:1fr;gap:22px}
      .faq-wrap{grid-template-columns:1fr;gap:24px}
      .cta-panel{grid-template-columns:1fr;gap:24px;padding:30px}
      .footer-top{flex-direction:column}
    }
    @media(max-width:520px){
      .container{width:calc(100% - 32px)}
      h1{font-size:39px}
      h2{font-size:29px}
      .brand{font-size:18px}
      .hero-copy>p{font-size:15px}
      .hero-actions .btn{width:100%}
      .hero-art{min-height:285px}
      .art-note{left:15px;bottom:15px}
      .matrix-cards{grid-template-columns:1fr}
      .feature-card{grid-column:auto;min-height:205px}
      .mini-card{min-height:110px}
      .data-panel{padding:14px}
      .data-item{padding:13px 9px}
      .data-item:first-child{padding-left:9px}
      .data-value{font-size:26px}
      .process{grid-template-columns:1fr}
      .step{display:grid;grid-template-columns:53px 1fr;column-gap:14px;padding:0}
      .step-num{grid-row:span 2}
      .step h3{margin:2px 0 4px}
      .step p{max-width:none}
      .topic-wall{display:flex;overflow-x:auto;padding:2px 2px 16px;scroll-snap-type:x mandatory}
      .topic-card{min-width:82%;height:235px;scroll-snap-align:start}
      .topic-card:first-child{min-width:88%;height:270px}
      .news-item{grid-template-columns:72px 1fr;gap:10px}
      .news-item .read-link{grid-column:2}
      .source-strip{padding:23px}
      .guard-grid{grid-template-columns:1fr}
      .cta-panel{padding:24px 19px}
      .cta-panel h2{font-size:28px}
      .feedback-form{flex-direction:column}
      .feedback-form input,.feedback-form button{width:100%}
      .footer-links{gap:16px}
      .footer-bottom{flex-direction:column}
    }
    @media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;transition:none!important}}

/* roulang page: category1 */
:root{
      --blue:#315fce;--blue-dark:#244ba8;--blue-soft:#eaf1ff;--ink:#18243a;
      --muted:#64728a;--paper:#f7f9fc;--white:#fff;--line:#e1e7f0;
      --coral:#ef8d72;--yellow:#f4ca67;--radius:18px;
      --shadow:0 14px 38px rgba(31,55,96,.08);--shadow-hover:0 20px 44px rgba(31,55,96,.14);
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth;scroll-padding-top:92px}
    body{margin:0;background:var(--paper);color:var(--ink);font-family:ui-sans-serif,system-ui,-apple-system,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;line-height:1.7}
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    button,input,textarea,select{font:inherit}
    button,a,input,textarea{ -webkit-tap-highlight-color:transparent}
    button{cursor:pointer}
    .container{width:min(1160px,calc(100% - 48px));margin-inline:auto}
    .site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.95);border-bottom:1px solid rgba(225,231,240,.9);backdrop-filter:blur(14px)}
    .nav-wrap{height:76px;display:flex;align-items:center;justify-content:space-between;gap:28px}
    .brand{display:inline-flex;align-items:center;gap:12px;font-size:20px;font-weight:850;letter-spacing:-.04em;white-space:nowrap}
    .brand-icon{width:34px;height:34px;background:var(--blue);border-radius:9px;display:grid;place-items:center;color:#fff;box-shadow:4px 4px 0 #cad8fa}
    .brand-icon span{font-size:17px;line-height:1}
    .nav-links{display:flex;align-items:center;gap:30px;margin-left:auto}
    .nav-links a{font-size:14px;font-weight:650;color:#52617b;transition:color .2s}
    .nav-links a:hover,.nav-links a.active{color:var(--blue)}
    .nav-cta,.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;border:1px solid transparent;border-radius:11px;padding:11px 17px;font-size:14px;font-weight:750;transition:transform .2s,background .2s,box-shadow .2s,border-color .2s}
    .nav-cta,.btn-primary{background:var(--blue);color:#fff;box-shadow:0 7px 16px rgba(49,95,206,.18)}
    .nav-cta:hover,.btn-primary:hover{background:var(--blue-dark);transform:translateY(-2px);box-shadow:0 10px 22px rgba(49,95,206,.24)}
    .menu-toggle{display:none;border:1px solid var(--line);background:#fff;border-radius:10px;padding:9px 12px;color:var(--ink)}
    main{overflow:hidden}
    section{padding:78px 0;position:relative}
    .section-soft{background:#f0f5ff}
    .section-white{background:#fff}
    .section-head{display:flex;justify-content:space-between;align-items:flex-end;gap:30px;margin-bottom:32px}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--blue);font-size:12px;font-weight:800;letter-spacing:.09em}
    .eyebrow:before{content:"";width:17px;height:3px;background:var(--coral);border-radius:5px}
    .section-copy{max-width:680px;color:var(--muted);font-size:15px;margin:11px 0 0}
    .category-intro{padding:70px 0 66px;background:#f8faff;position:relative;overflow:hidden}
    .category-intro:after{content:"";position:absolute;right:-80px;top:-120px;width:430px;height:430px;border:1px solid #d6e1f7;border-radius:50%;box-shadow:0 0 0 24px rgba(220,231,250,.42),0 0 0 48px rgba(220,231,250,.2)}
    .intro-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:54px;align-items:center;position:relative;z-index:1}
    .intro-copy h1{font-size:clamp(34px,5vw,62px);line-height:1.14;letter-spacing:-.06em;margin:15px 0 18px;max-width:680px}
    .intro-copy p{font-size:17px;color:#5b6980;max-width:650px;margin:0}
    .intro-tags{display:flex;gap:9px;flex-wrap:wrap;margin-top:25px}
    .pill,.tag{display:inline-flex;align-items:center;gap:6px;padding:6px 10px;background:#fff;border:1px solid var(--line);border-radius:999px;color:#64728a;font-size:12px;font-weight:700}
    .pill-dot{width:7px;height:7px;border-radius:50%;background:#68b99a}
    .intro-art{height:310px;border-radius:24px;overflow:hidden;position:relative;box-shadow:var(--shadow);background:#dce7f8}
    .intro-art img{width:100%;height:100%;object-fit:cover}
    .intro-art:after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(18,43,90,.34),rgba(18,43,90,.04))}
    .art-note{position:absolute;left:22px;bottom:22px;z-index:2;color:#fff;border-left:3px solid var(--yellow);padding-left:12px;font-size:13px;font-weight:700}
    .filter-bar{display:flex;align-items:center;gap:14px;flex-wrap:wrap;padding:18px 20px;background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow)}
    .filter-label{font-size:13px;font-weight:800;color:var(--ink);margin-right:4px}
    .filter-chip{border:1px solid #dce4f0;background:#f8faff;color:#61708a;padding:8px 14px;border-radius:9px;font-size:13px;transition:.2s}
    .filter-chip:hover,.filter-chip.active{color:#fff;background:var(--blue);border-color:var(--blue);transform:translateY(-1px)}
    .content-layout{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(250px,.65fr);gap:30px;align-items:start}
    .article-list{display:flex;flex-direction:column;gap:16px}
    .article-card{display:grid;grid-template-columns:184px 1fr;gap:22px;padding:16px;background:#fff;border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow);transition:.22s}
    .article-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);border-color:#c9d6f1}
    .article-image{height:148px;border-radius:11px;overflow:hidden;background:#e7eef9}
    .article-image img{width:100%;height:100%;object-fit:cover;transition:transform .45s}
    .article-card:hover img{transform:scale(1.04)}
    .article-meta{display:flex;align-items:center;gap:10px;color:#8793a6;font-size:12px;margin-bottom:8px}
    .article-card h2{font-size:20px;line-height:1.4;margin:0 0 7px;letter-spacing:-.025em}
    .article-card p{font-size:13px;color:var(--muted);margin:0 0 13px}
    .read-link{color:var(--blue);font-weight:750;font-size:13px}
    .read-link:hover{text-decoration:underline}
    .side-panel{background:#fff;border:1px solid var(--line);border-radius:16px;padding:24px;box-shadow:var(--shadow);position:sticky;top:104px}
    .side-panel h2{font-size:19px;margin:0 0 8px}
    .side-panel>p{font-size:13px;color:var(--muted);margin:0 0 19px}
    .side-index{display:flex;flex-direction:column}
    .side-index a{display:flex;justify-content:space-between;gap:12px;padding:13px 0;border-bottom:1px solid var(--line);font-size:13px;color:#52617b;transition:.2s}
    .side-index a:hover{color:var(--blue);padding-left:4px}
    .side-index span{font-family:ui-monospace,monospace;color:#a0aabd;font-size:11px}
    .more-area{text-align:center;margin-top:25px}
    .btn-outline{background:#fff;border:1px solid #cdd9ee;color:var(--blue)}
    .btn-outline:hover{background:var(--blue-soft);border-color:#9eb5eb;transform:translateY(-2px)}
    .feature-strip{display:grid;grid-template-columns:1.35fr .8fr .8fr;gap:16px}
    .topic-card{min-height:225px;border-radius:17px;overflow:hidden;position:relative;padding:22px;display:flex;flex-direction:column;justify-content:flex-end;box-shadow:var(--shadow);background:#cbd9ef}
    .topic-card img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:.5s}
    .topic-card:hover img{transform:scale(1.05)}
    .topic-card:after{content:"";position:absolute;inset:0;background:linear-gradient(0deg,rgba(18,34,66,.83),rgba(18,34,66,.02) 78%)}
    .topic-card>*:not(img){position:relative;z-index:1;color:#fff}
    .topic-card h3{font-size:20px;margin:8px 0 4px}
    .topic-card p{font-size:12px;color:rgba(255,255,255,.82);margin:0}
    .topic-card .tag{width:max-content;background:rgba(255,255,255,.9);color:#33435e;border:0}
    .timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:0;background:#fff;border:1px solid var(--line);border-radius:17px;box-shadow:var(--shadow);overflow:hidden}
    .timeline-item{padding:23px 22px;border-right:1px solid var(--line);position:relative}
    .timeline-item:last-child{border-right:0}
    .timeline-item b{font-family:ui-monospace,monospace;color:var(--blue);font-size:12px}
    .timeline-item h3{font-size:16px;margin:9px 0 5px}
    .timeline-item p{font-size:12px;color:var(--muted);margin:0}
    .faq-grid{display:grid;grid-template-columns:.72fr 1.28fr;gap:48px;align-items:start}
    .faq-grid h2{font-size:32px;line-height:1.25;letter-spacing:-.04em;margin:12px 0}
    .faq-list{display:flex;flex-direction:column;gap:10px}
    .faq-item{padding:0;overflow:hidden;box-shadow:none}
    .faq-item summary{cursor:pointer;list-style:none;padding:17px 20px;font-size:15px;font-weight:750;display:flex;justify-content:space-between;align-items:center}
    .faq-item summary::-webkit-details-marker{display:none}
    .faq-item summary:after{content:"＋";color:var(--blue);font-size:20px;font-weight:400}
    .faq-item[open] summary:after{content:"－"}
    .faq-item p{padding:0 20px 18px;color:var(--muted);font-size:13px;margin:0}
    .site-footer{background:#16243d;color:#dbe5f7;padding:54px 0 22px}
    .footer-top{display:flex;justify-content:space-between;gap:45px;padding-bottom:38px;border-bottom:1px solid rgba(255,255,255,.12)}
    .footer-brand .brand{color:#fff}
    .footer-brand .brand-icon{box-shadow:4px 4px 0 rgba(255,255,255,.12)}
    .footer-brand p{font-size:13px;color:#9eabc0;max-width:350px;margin:17px 0 0}
    .footer-links{display:flex;gap:22px;flex-wrap:wrap;align-items:center}
    .footer-links a{font-size:13px;color:#c1cde0;transition:.2s}
    .footer-links a:hover{color:#fff}
    .footer-bottom{display:flex;justify-content:space-between;gap:20px;padding-top:20px;color:#8c9bb2;font-size:12px}
    .footer-bottom a:hover{color:#fff}
    :focus-visible{outline:3px solid rgba(49,95,206,.35);outline-offset:3px}
    @media(max-width:1024px){
      .intro-grid{gap:30px}.content-layout{grid-template-columns:1fr}.side-panel{position:static}
      .feature-strip{grid-template-columns:1fr 1fr}.topic-card:first-child{grid-column:span 2}
    }
    @media(max-width:768px){
      .container{width:min(100% - 32px,600px)}.nav-wrap{height:68px}.nav-cta{display:none}
      .menu-toggle{display:block}.nav-links{display:none;position:absolute;left:16px;right:16px;top:74px;padding:12px;flex-direction:column;align-items:stretch;gap:0;background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow)}
      .nav-links.open{display:flex}.nav-links a{padding:13px 12px;border-bottom:1px solid #eef1f6}.nav-links a:last-child{border-bottom:0}
      .intro-grid{grid-template-columns:1fr}.category-intro{padding:55px 0}.intro-art{height:240px}
      section{padding:60px 0}.section-head{display:block}.section-copy{margin-top:10px}.article-card{grid-template-columns:130px 1fr;gap:15px}.article-image{height:132px}
      .timeline{grid-template-columns:1fr 1fr}.timeline-item:nth-child(2){border-right:0}.timeline-item:nth-child(-n+2){border-bottom:1px solid var(--line)}
      .faq-grid{grid-template-columns:1fr;gap:24px}.footer-top,.footer-bottom{display:block}.footer-links{margin-top:25px}
      .footer-bottom a{display:block;margin-top:7px}
    }
    @media(max-width:520px){
      .intro-copy h1{font-size:36px}.intro-copy p{font-size:15px}.filter-bar{align-items:flex-start}.filter-label{width:100%}
      .article-card{grid-template-columns:1fr}.article-image{height:190px}.feature-strip{display:flex;overflow:auto;margin-right:-16px;padding-right:16px}.topic-card{min-width:250px}
      .timeline{grid-template-columns:1fr}.timeline-item{border-right:0!important;border-bottom:1px solid var(--line)}.timeline-item:last-child{border-bottom:0}
    }