/* roulang page: index */
:root{
      --ink:#10243e;
      --muted:#617089;
      --blue:#1769e0;
      --blue-dark:#0d3f91;
      --cyan:#27b7c9;
      --paper:#f5f8fc;
      --line:#dce5f0;
      --white:#fff;
      --radius:18px;
      --shadow:0 18px 45px rgba(27,64,112,.12);
    }
    *,*::before,*::after{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;color:var(--ink);background:var(--paper);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;line-height:1.7}
    a{text-decoration:none;color:inherit}
    img{display:block;max-width:100%}
    button,input{font:inherit}
    button{cursor:pointer}
    .container{width:min(1180px,calc(100% - 40px));margin:auto}
    .notice{background:#092c63;color:#dcecff;font-size:13px}
    .notice-inner{min-height:36px;display:flex;align-items:center;justify-content:space-between;gap:20px}
    .notice strong{color:#fff}
    .header{background:rgba(255,255,255,.96);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20;backdrop-filter:blur(14px)}
    .nav{height:78px;display:flex;align-items:center;gap:28px}
    .logo{font-size:19px;font-weight:800;letter-spacing:0;color:var(--blue-dark);white-space:nowrap}
    .logo span{color:var(--cyan)}
    .nav-links{display:flex;align-items:center;gap:7px;margin-right:auto}
    .nav-links a{padding:10px 13px;color:#52637a;font-size:14px;border-radius:10px;transition:.2s}
    .nav-links a:hover,.nav-links a.active{background:#edf5ff;color:var(--blue);font-weight:700}
    .search{display:flex;align-items:center;background:#f2f6fb;border:1px solid #e2eaf3;border-radius:11px;padding:0 12px;gap:7px}
    .search input{width:145px;border:0;outline:0;background:transparent;padding:9px 0;font-size:13px;color:var(--ink)}
    .search button{border:0;background:none;color:var(--blue);padding:4px}
    .nav-cta,.hero-btn,.outline-btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:10px;padding:11px 18px;font-size:14px;font-weight:700;transition:.2s}
    .nav-cta,.hero-btn{background:var(--blue);color:#fff;box-shadow:0 8px 18px rgba(23,105,224,.2)}
    .nav-cta:hover,.hero-btn:hover{background:var(--blue-dark);transform:translateY(-2px)}
    .outline-btn{border:1px solid #bcd0e9;color:var(--blue);background:#fff}
    .outline-btn:hover{border-color:var(--blue);background:#f0f6ff}
    .mobile-toggle{display:none;border:0;background:none;color:var(--ink);font-size:24px}
    .hero{position:relative;min-height:570px;color:#fff;display:flex;align-items:center;overflow:hidden;background:#0b316b}
    .hero::before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(5,31,77,.94) 0%,rgba(8,52,111,.78) 48%,rgba(8,52,111,.4) 100%),url("https://images.unsplash.com/photo-1516321318423-f06f85e504b3?auto=format&fit=crop&w=2000&q=85") center/cover}
    .hero-content{position:relative;z-index:1;max-width:760px;padding:78px 0 92px}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;color:#a9eaf1;font-weight:700;font-size:13px;letter-spacing:1px;margin-bottom:18px}
    .eyebrow::before{content:"";width:28px;height:2px;background:var(--cyan)}
    h1{font-size:clamp(38px,5vw,68px);line-height:1.12;margin:0 0 25px;letter-spacing:0;font-weight:850}
    .hero-copy{font-size:18px;line-height:1.9;color:#dbe9fb;max-width:690px;margin:0 0 30px}
    .hero-actions{display:flex;gap:12px;flex-wrap:wrap}
    .hero .outline-btn{background:rgba(255,255,255,.1);border-color:rgba(255,255,255,.45);color:#fff}
    .hero .outline-btn:hover{background:#fff;color:var(--blue-dark)}
    .hero-stat{position:absolute;right:0;bottom:55px;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.22);backdrop-filter:blur(12px);padding:22px 25px;border-radius:16px;min-width:235px}
    .hero-stat b{display:block;font-size:30px;line-height:1;color:#fff}
    .hero-stat small{display:block;color:#cfe2fa;margin-top:8px}
    section{padding:88px 0}
    .section-head{max-width:700px;margin-bottom:38px}
    .section-head.center{margin-left:auto;margin-right:auto;text-align:center}
    .kicker{font-size:12px;color:var(--blue);font-weight:800;letter-spacing:1.4px;text-transform:uppercase;margin-bottom:8px}
    h2{font-size:clamp(27px,3vw,40px);line-height:1.25;margin:0 0 14px}
    .section-head p{color:var(--muted);margin:0;font-size:16px}
    .white{background:#fff}
    .feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
    .feature{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:27px;box-shadow:var(--shadow);transition:.25s}
    .feature:hover,.content-card:hover{transform:translateY(-5px);box-shadow:0 24px 50px rgba(27,64,112,.17)}
    .icon{width:44px;height:44px;border-radius:12px;display:grid;place-items:center;background:#e9f6fb;color:#087e9a;font-size:21px;margin-bottom:19px}
    .feature h3,.content-card h3{font-size:19px;margin:0 0 9px}
    .feature p,.content-card p{color:var(--muted);font-size:14px;margin:0}
    .split{display:grid;grid-template-columns:1fr 1fr;gap:62px;align-items:center}
    .visual{border-radius:22px;overflow:hidden;box-shadow:var(--shadow);position:relative}
    .visual img{width:100%;height:390px;object-fit:cover}
    .visual-label{position:absolute;left:22px;bottom:22px;background:rgba(8,36,79,.88);color:#fff;border-left:3px solid var(--cyan);padding:13px 17px;border-radius:8px;font-size:14px}
    .check-list{list-style:none;padding:0;margin:26px 0 0}
    .check-list li{display:flex;gap:12px;margin:15px 0;color:#40536d;font-size:15px}
    .check-list li::before{content:"✓";flex:0 0 22px;height:22px;border-radius:50%;display:grid;place-items:center;background:#e4f6f5;color:#118b8e;font-weight:800}
    .dark-band{background:#0b2d60;color:#fff}
    .dark-band .section-head p{color:#bdd1ec}
    .metric-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:rgba(255,255,255,.18);border:1px solid rgba(255,255,255,.2);border-radius:16px;overflow:hidden}
    .metric{padding:27px;background:rgba(255,255,255,.05)}
    .metric strong{font-size:35px;display:block;color:#8de4e9}
    .metric span{font-size:14px;color:#c9d9ed}
    .category-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:15px}
    .category{min-height:145px;border-radius:15px;padding:21px;color:#fff;display:flex;flex-direction:column;justify-content:space-between;background:linear-gradient(145deg,#1769e0,#16458e)}
    .category:nth-child(2){background:linear-gradient(145deg,#159aa9,#087078)}
    .category:nth-child(3){background:linear-gradient(145deg,#5571b9,#2b3d77)}
    .category:nth-child(4){background:linear-gradient(145deg,#16836e,#0b594d)}
    .category b{font-size:18px}.category span{font-size:13px;color:#d7edf6}
    .steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
    .step{position:relative;padding-top:15px}
    .step:not(:last-child)::after{content:"";position:absolute;top:31px;right:-17px;width:30px;border-top:1px dashed #aec4df}
    .step-num{width:34px;height:34px;display:grid;place-items:center;border-radius:50%;background:var(--blue);color:#fff;font-weight:800;margin-bottom:17px}
    .step h3{font-size:17px;margin:0 0 8px}.step p{font-size:14px;color:var(--muted);margin:0}
    .content-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
    .content-card{background:#fff;border:1px solid var(--line);border-radius:15px;overflow:hidden;transition:.25s}
    .content-card img{height:170px;width:100%;object-fit:cover}
    .content-body{padding:20px}
    .tag{display:inline-block;color:var(--blue);background:#eaf3ff;padding:4px 9px;border-radius:6px;font-size:12px;font-weight:700;margin-bottom:11px}
    .quote-wrap{display:grid;grid-template-columns:1fr 1fr;gap:20px}
    .quote{padding:27px;background:#f7fbff;border:1px solid #dfeaf6;border-radius:16px}
    .quote p{font-size:16px;color:#40536d;margin:0 0 18px}
    .quote strong{font-size:14px}.quote small{display:block;color:var(--muted);margin-top:3px}
    .notice-box{border:1px solid #c9dced;background:#eef7ff;border-radius:15px;padding:22px 25px;color:#435c78}
    .cta{background:#e8f4ff;padding:72px 0}
    .cta-inner{display:flex;align-items:center;justify-content:space-between;gap:25px}
    .cta h2{margin-bottom:8px}.cta p{margin:0;color:var(--muted)}
    footer{background:#071d3c;color:#b7c8df;padding:55px 0 25px}
    .footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;padding-bottom:42px;border-bottom:1px solid rgba(255,255,255,.13)}
    footer .logo{color:#fff}footer .logo span{color:#6dd9df}
    footer p{font-size:14px;max-width:310px;line-height:1.8}
    footer h4{color:#fff;margin:0 0 14px;font-size:14px}
    footer a{display:block;font-size:13px;margin:9px 0;color:#b7c8df}footer a:hover{color:#fff}
    .copyright{padding-top:20px;font-size:12px;color:#849bb9;display:flex;justify-content:space-between;gap:15px}
    :focus-visible{outline:3px solid rgba(39,183,201,.55);outline-offset:3px}
    @media(max-width:1024px){.hero-stat{position:static;margin-top:35px;display:inline-block}.hero{min-height:auto}.category-grid{grid-template-columns:repeat(2,1fr)}}
    @media(max-width:768px){.container{width:min(100% - 30px,600px)}.nav{height:66px}.mobile-toggle{display:block;margin-left:auto}.nav-links,.search,.nav-cta{display:none}.mobile-open .nav-links{display:flex;position:absolute;top:66px;left:0;right:0;background:#fff;border-bottom:1px solid var(--line);padding:12px 15px;flex-direction:column;align-items:stretch;box-shadow:0 15px 25px rgba(0,0,0,.08)}.mobile-open .nav-links a{padding:12px}.notice-inner{justify-content:center;text-align:center}.notice-inner span:last-child{display:none}.hero-content{padding:65px 0 70px}.hero-copy{font-size:16px}.split{grid-template-columns:1fr;gap:30px}.split .visual{order:2}.feature-grid,.content-grid{grid-template-columns:1fr 1fr}.metric-grid{grid-template-columns:repeat(2,1fr)}.steps{grid-template-columns:1fr 1fr}.step:not(:last-child)::after{display:none}.quote-wrap{grid-template-columns:1fr}.cta-inner{align-items:flex-start;flex-direction:column}.footer-grid{grid-template-columns:1fr 1fr}}
    @media(max-width:520px){section{padding:62px 0}h1{font-size:39px}.feature-grid,.content-grid,.category-grid,.steps{grid-template-columns:1fr}.metric strong{font-size:29px}.hero-actions{flex-direction:column;align-items:stretch}.hero-actions a{text-align:center}.visual img{height:280px}.footer-grid{grid-template-columns:1fr;gap:25px}.copyright{flex-direction:column}.logo{font-size:16px}.notice{font-size:12px}}

/* roulang page: category1 */
:root{
      --ink:#10243e;
      --muted:#617089;
      --blue:#1769e0;
      --blue-dark:#0d3f91;
      --cyan:#27b7c9;
      --paper:#f5f8fc;
      --line:#dce5f0;
      --white:#fff;
      --radius:18px;
      --shadow:0 18px 45px rgba(27,64,112,.12);
    }
    *,*::before,*::after{box-sizing:border-box}
    html{scroll-behavior:smooth;scroll-padding-top:90px}
    body{margin:0;color:var(--ink);background:var(--paper);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;line-height:1.7}
    a{text-decoration:none;color:inherit}
    img{display:block;max-width:100%}
    button,input{font:inherit}
    button{cursor:pointer}
    :focus-visible{outline:3px solid rgba(39,183,201,.72);outline-offset:3px}
    .container{width:min(1180px,calc(100% - 40px));margin-inline:auto}
    .header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.96);border-bottom:1px solid var(--line);backdrop-filter:blur(14px)}
    .announcement{background:#0d3f91;color:#eaf4ff;font-size:12px}
    .announcement-inner{min-height:34px;display:flex;align-items:center;justify-content:space-between;gap:12px}
    .announcement strong{color:#8ce3e6;font-weight:700}
    .nav{height:78px;display:flex;align-items:center;gap:26px}
    .logo{font-size:18px;font-weight:800;color:var(--blue-dark);white-space:nowrap;line-height:1.25}
    .logo span{color:var(--cyan)}
    .nav-links{display:flex;align-items:center;gap:5px;margin-right:auto}
    .nav-links a{padding:10px 12px;color:#52637a;font-size:14px;border-radius:10px;transition:background .2s,color .2s}
    .nav-links a:hover,.nav-links a.active{background:#edf5ff;color:var(--blue);font-weight:700}
    .search{display:flex;align-items:center;gap:7px;padding:0 11px;background:#f2f6fb;border:1px solid #e2eaf3;border-radius:11px}
    .search input{width:118px;padding:9px 0;border:0;outline:0;background:transparent;color:var(--ink);font-size:13px}
    .search button{padding:5px;border:0;background:none;color:var(--blue);font-size:16px}
    .nav-cta,.hero-btn,.outline-btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 17px;border-radius:10px;font-size:14px;font-weight:700;transition:transform .2s,background .2s,border-color .2s,box-shadow .2s}
    .nav-cta,.hero-btn{color:#fff;background:var(--blue);box-shadow:0 8px 18px rgba(23,105,224,.2)}
    .nav-cta:hover,.hero-btn:hover{transform:translateY(-2px);background:var(--blue-dark);box-shadow:0 12px 23px rgba(13,63,145,.23)}
    .outline-btn{color:var(--blue);background:#fff;border:1px solid #bcd0e9}
    .outline-btn:hover{background:#f0f6ff;border-color:var(--blue)}
    .mobile-toggle{display:none;width:42px;height:42px;border:1px solid var(--line);border-radius:10px;background:#fff;color:var(--ink);font-size:21px}
    .hero{position:relative;overflow:hidden;color:#fff;background:#0b316b}
    .hero::before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(5,31,77,.94),rgba(8,52,111,.78) 52%,rgba(8,52,111,.37)),url("https://images.unsplash.com/photo-1516321318423-f06f85e504b3?auto=format&fit=crop&w=2000&q=85") center 44%/cover}
    .hero-inner{position:relative;z-index:1;min-height:390px;display:grid;grid-template-columns:minmax(0,1.35fr) minmax(260px,.65fr);align-items:center;gap:44px;padding-block:58px}
    .eyebrow{display:inline-flex;align-items:center;gap:9px;margin:0 0 15px;color:#a9eaf1;font-size:13px;font-weight:700}
    .eyebrow::before{content:"";width:27px;height:2px;background:var(--cyan)}
    h1,h2,h3,p{margin-top:0}
    h1{max-width:720px;margin-bottom:16px;font-size:clamp(34px,5vw,54px);line-height:1.18;font-weight:800}
    .hero-copy{max-width:680px;margin-bottom:25px;color:#dbe9fb;font-size:16px;line-height:1.9}
    .hero-actions{display:flex;flex-wrap:wrap;gap:11px}
    .hero .outline-btn{color:#fff;background:rgba(255,255,255,.1);border-color:rgba(255,255,255,.45)}
    .hero .outline-btn:hover{color:var(--blue-dark);background:#fff}
    .hero-note{align-self:end;padding:20px 0;border-top:1px solid rgba(255,255,255,.35)}
    .hero-note strong{display:block;margin-bottom:7px;color:#fff;font-size:18px}
    .hero-note p{margin:0;color:#d0e2f7;font-size:14px}
    main section{padding:70px 0}
    .section-head{max-width:700px;margin-bottom:30px}
    .section-head h2{margin:0 0 10px;font-size:30px;line-height:1.3}
    .section-head p{margin:0;color:var(--muted);font-size:15px}
    .section-head.center{margin-inline:auto;text-align:center}
    .intro-band{background:#fff;border-bottom:1px solid var(--line)}
    .intro-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:center}
    .intro-copy{max-width:690px;color:#43556e;font-size:15px}
    .intro-copy p:last-child{margin-bottom:0}
    .quality-panel{display:grid;grid-template-columns:1fr 1fr;gap:1px;overflow:hidden;border:1px solid var(--line);border-radius:14px;background:var(--line)}
    .quality-item{min-height:112px;padding:20px;background:#f8fbff}
    .quality-item b{display:block;margin-bottom:5px;color:var(--blue-dark);font-size:17px}
    .quality-item span{color:var(--muted);font-size:13px}
    .topic-section{background:var(--paper)}
    .topic-layout{display:grid;grid-template-columns:.72fr 1.28fr;gap:32px;align-items:start}
    .topic-aside{position:sticky;top:120px;padding:25px;background:#e9f4ff;border-left:4px solid var(--cyan);border-radius:0 14px 14px 0}
    .topic-aside h3{margin:0 0 10px;font-size:20px}
    .topic-aside p{margin:0;color:#526780;font-size:14px}
    .category-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
    .category-card{position:relative;min-height:150px;padding:22px;background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:0 9px 25px rgba(27,64,112,.07);transition:transform .22s,box-shadow .22s,border-color .22s}
    .category-card:hover{transform:translateY(-4px);border-color:#b9d2f0;box-shadow:var(--shadow)}
    .category-card .tag{display:inline-block;margin-bottom:12px;padding:4px 9px;border-radius:6px;color:var(--blue);background:#eaf3ff;font-size:12px;font-weight:700}
    .category-card h3{margin:0 0 7px;font-size:18px}
    .category-card p{margin:0;color:var(--muted);font-size:13px}
    .feature-section{background:#fff}
    .feature-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:17px}
    .feature{padding:24px;background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:0 10px 27px rgba(27,64,112,.07);transition:transform .22s,box-shadow .22s}
    .feature:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
    .feature-mark{display:grid;place-items:center;width:38px;height:38px;margin-bottom:14px;border-radius:11px;color:#087f91;background:#e2f7f6;font-size:18px;font-weight:800}
    .feature h3{margin:0 0 8px;font-size:17px}
    .feature p{margin:0;color:var(--muted);font-size:14px}
    .compare-section{background:#f0f6fd}
    .compare-wrap{overflow:hidden;border:1px solid var(--line);border-radius:14px;background:#fff;box-shadow:0 10px 30px rgba(27,64,112,.07)}
    .compare-row{display:grid;grid-template-columns:1fr 1fr 1fr}
    .compare-row+.compare-row{border-top:1px solid var(--line)}
    .compare-row span{padding:15px 18px;color:#40536d;font-size:14px}
    .compare-row span+span{border-left:1px solid var(--line)}
    .compare-row.header-row{background:#eaf3ff}
    .compare-row.header-row span{color:var(--blue-dark);font-weight:800}
    .compare-row span:first-child{font-weight:700}
    .media-section{background:#fff}
    .media-layout{display:grid;grid-template-columns:.9fr 1.1fr;gap:38px;align-items:center}
    .media-image{width:100%;height:330px;object-fit:cover;border-radius:14px}
    .media-copy h2{margin-bottom:12px;font-size:28px;line-height:1.35}
    .media-copy p{margin-bottom:16px;color:var(--muted);font-size:15px}
    .check-list{list-style:none;padding:0;margin:18px 0 0}
    .check-list li{display:flex;gap:11px;margin:12px 0;color:#40536d;font-size:14px}
    .check-list li::before{content:"✓";flex:0 0 22px;height:22px;display:grid;place-items:center;border-radius:50%;color:#118b8e;background:#e4f6f5;font-weight:800}
    .dark-band{color:#fff;background:#0b2a54}
    .dark-band .section-head p{color:#c1d2e8}
    .metric-grid{display:grid;grid-template-columns:repeat(4,1fr);overflow:hidden;border:1px solid rgba(255,255,255,.2);border-radius:14px;background:rgba(255,255,255,.14)}
    .metric{min-height:126px;padding:22px;background:#0b2a54}
    .metric+.metric{border-left:1px solid rgba(255,255,255,.17)}
    .metric b{display:block;margin-bottom:6px;color:#8ce3e6;font-size:20px}
    .metric span{color:#d4e1f1;font-size:13px}
    .standards-section{background:var(--paper)}
    .standards-layout{display:grid;grid-template-columns:1fr 1fr;gap:38px;align-items:start}
    .standards-list{list-style:none;padding:0;margin:0}
    .standards-list li{display:flex;gap:15px;padding:17px 0;border-bottom:1px solid var(--line)}
    .standards-list li:last-child{border-bottom:0}
    .standards-list b{display:block;margin-bottom:3px;font-size:15px}
    .standards-list span{color:var(--muted);font-size:13px}
    .standards-list i{flex:0 0 28px;height:28px;display:grid;place-items:center;border-radius:50%;color:var(--blue);background:#eaf3ff;font-style:normal;font-size:13px;font-weight:800}
    .note-panel{padding:24px;border:1px solid #cfe0f2;border-radius:14px;background:#fff}
    .note-panel h3{margin:0 0 9px;font-size:19px}
    .note-panel p{margin:0;color:var(--muted);font-size:14px}
    .latest-section{background:#fff}
    .content-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
    .content-card{overflow:hidden;background:#fff;border:1px solid var(--line);border-radius:14px;transition:transform .22s,box-shadow .22s}
    .content-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
    .content-card img{width:100%;height:175px;object-fit:cover}
    .content-body{padding:20px}
    .content-body .tag{display:inline-block;margin-bottom:10px;padding:4px 8px;border-radius:6px;color:var(--blue);background:#eaf3ff;font-size:12px;font-weight:700}
    .content-body h3{margin:0 0 8px;font-size:17px;line-height:1.45}
    .content-body p{margin:0;color:var(--muted);font-size:13px}
    .quote-section{background:#f0f6fd}
    .quote-layout{display:grid;grid-template-columns:1fr 1fr;gap:18px}
    .quote{padding:25px 26px;border:1px solid var(--line);border-radius:14px;background:#fff}
    .quote blockquote{margin:0 0 15px;color:#334a66;font-size:16px;line-height:1.8}
    .quote cite{color:var(--muted);font-size:13px;font-style:normal}
    .quote-mark{color:var(--cyan);font-size:28px;line-height:1}
    .cta{padding:54px 0;background:#e8f4ff}
    .cta-inner{display:flex;align-items:center;justify-content:space-between;gap:24px}
    .cta h2{margin:0 0 7px;font-size:27px}
    .cta p{margin:0;color:var(--muted);font-size:14px}
    footer{padding:52px 0 24px;color:#b7c8df;background:#071d3c}
    .footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:34px;padding-bottom:36px;border-bottom:1px solid rgba(255,255,255,.13)}
    footer .logo{color:#fff}
    footer .logo span{color:#6dd9df}
    footer p{max-width:310px;margin:14px 0 0;font-size:14px;line-height:1.8}
    footer h4{margin:0 0 13px;color:#fff;font-size:14px}
    footer .footer-grid a:not(.logo){display:block;margin:9px 0;color:#b7c8df;font-size:13px;transition:color .2s}
    footer .footer-grid a:hover{color:#fff}
    .copyright{display:flex;justify-content:space-between;gap:15px;padding-top:18px;color:#849bb9;font-size:12px}
    @media(max-width:1024px){
      .nav{gap:14px}
      .nav-links a{padding-inline:9px;font-size:13px}
      .search input{width:86px}
      .hero-inner{gap:26px}
      .feature-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
      .footer-grid{grid-template-columns:1.5fr 1fr 1fr;gap:25px}
      .footer-grid>div:last-child{grid-column:2 / 4}
    }
    @media(max-width:768px){
      .container{width:min(100% - 32px,620px)}
      .announcement-inner{min-height:32px;font-size:11px}
      .announcement-inner span:last-child{display:none}
      .nav{height:66px}
      .mobile-toggle{display:block;margin-left:auto}
      .nav-links,.search,.nav-cta{display:none}
      .mobile-open .nav-links{position:absolute;top:98px;left:0;right:0;display:flex;flex-direction:column;align-items:stretch;gap:3px;margin:0;padding:12px 16px;background:#fff;border-bottom:1px solid var(--line);box-shadow:0 15px 25px rgba(0,0,0,.08)}
      .mobile-open .nav-links a{padding:12px}
      .hero-inner{min-height:0;grid-template-columns:1fr;padding-block:54px}
      .hero-note{max-width:470px;padding-top:16px}
      main section{padding:56px 0}
      .intro-grid,.topic-layout,.media-layout,.standards-layout{grid-template-columns:1fr;gap:24px}
      .topic-aside{position:static}
      .media-image{height:280px}
      .metric-grid{grid-template-columns:repeat(2,1fr)}
      .metric:nth-child(3){border-left:0;border-top:1px solid rgba(255,255,255,.17)}
      .metric:nth-child(4){border-top:1px solid rgba(255,255,255,.17)}
      .content-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
      .cta-inner{align-items:flex-start;flex-direction:column}
      .footer-grid{grid-template-columns:1fr 1fr}
      .footer-grid>div:last-child{grid-column:auto}
    }
    @media(max-width:520px){
      .container{width:calc(100% - 28px)}
      .logo{max-width:230px;font-size:16px;white-space:normal}
      .hero-inner{padding-block:45px}
      h1{font-size:35px}
      .hero-copy{font-size:15px}
      .hero-actions{align-items:stretch}
      .hero-actions .hero-btn,.hero-actions .outline-btn{width:100%}
      main section{padding:46px 0}
      .section-head h2,.media-copy h2{font-size:25px}
      .quality-panel,.category-grid,.feature-grid,.content-grid,.quote-layout{grid-template-columns:1fr}
      .quality-item{min-height:0}
      .category-card{min-height:0}
      .compare-row span{padding:12px 9px;font-size:12px;overflow-wrap:anywhere}
      .media-image{height:225px}
      .metric{min-height:110px;padding:17px 13px}
      .metric b{font-size:17px}
      .footer-grid{grid-template-columns:1fr 1fr;gap:25px 16px}
      .footer-grid>div:first-child{grid-column:1 / -1}
      .copyright{flex-direction:column;gap:5px}
    }
    @media(prefers-reduced-motion:reduce){
      *,*::before,*::after{scroll-behavior:auto!important;transition:none!important}
    }