/* 乐鱼体育 · AI体育游戏平台 — 全站样式表（原生CSS，无框架） */
:root{
  --navy-950:#060F24;--navy-900:#0B1B3A;--navy-800:#102A56;--navy-700:#1A3A70;
  --blue-600:#2F7BFF;--blue-500:#4B8DFF;--blue-100:#E3EEFF;--blue-50:#F2F7FF;
  --teal-500:#19C6B7;--teal-400:#3EE0CF;--teal-100:#D9FAF6;
  --purple-500:#8B6CFF;--orange-500:#FF8A3D;
  --ice-200:#C7D7F2;--ice-100:#E8F1FF;
  --text-900:#0E1A33;--text-700:#2B3A57;--text-500:#5A6A88;--text-400:#8292AE;
  --line:#DCE5F3;--bg:#FFFFFF;--bg-alt:#F4F8FE;
  --radius:14px;--radius-sm:9px;--shadow:0 10px 30px rgba(11,27,58,.08);
  --font:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font);color:var(--text-700);background:var(--bg);line-height:1.8;font-size:16px;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:var(--blue-600);text-decoration:none}
a:hover{color:var(--teal-500)}
h1,h2,h3,h4,h5{color:var(--text-900);line-height:1.35;font-weight:700}
h1{font-size:clamp(28px,4vw,44px)}
h2{font-size:clamp(22px,2.6vw,30px);margin-bottom:14px}
h3{font-size:19px;margin-bottom:8px}
p{margin-bottom:14px}
ul,ol{padding-left:22px;margin-bottom:14px}
.wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
.skip-link{position:absolute;left:-999px;top:0;background:var(--blue-600);color:#fff;padding:8px 14px;z-index:100}
.skip-link:focus{left:10px}
.text-center{text-align:center}
.hide-mobile{}

/* 顶部条 & 头部 */
.topbar{background:var(--navy-950);color:var(--ice-200);font-size:12.5px}
.topbar .wrap{display:flex;gap:16px;justify-content:space-between;align-items:center;min-height:34px;flex-wrap:wrap}
.topbar-tag{letter-spacing:.14em;color:var(--teal-400);font-weight:600}
.site-header{position:sticky;top:0;z-index:50;background:rgba(11,27,58,.96);backdrop-filter:blur(8px);border-bottom:1px solid rgba(255,255,255,.06)}
.header-row{display:flex;align-items:center;gap:18px;min-height:66px}
.brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:800;font-size:19px;white-space:nowrap}
.brand:hover{color:#fff}
.brand small{display:block;font-size:9.5px;letter-spacing:.2em;color:var(--teal-400);font-weight:600;line-height:1.2}
.brand span{line-height:1.15}
.logo-mark{width:34px;height:34px;border-radius:9px}
.main-nav{display:flex;gap:2px;margin-left:auto;flex-wrap:nowrap}
.main-nav a{color:var(--ice-200);font-size:14px;padding:8px 10px;border-radius:8px;white-space:nowrap}
.main-nav a:hover{color:#fff;background:rgba(255,255,255,.07)}
.main-nav a[aria-current="page"]{color:#fff;background:rgba(47,123,255,.28);box-shadow:inset 0 -2px 0 var(--teal-400)}
.header-actions{display:flex;gap:8px;align-items:center}
.nav-toggle{display:none;width:42px;height:42px;border:1px solid rgba(255,255,255,.18);background:transparent;border-radius:10px;cursor:pointer;position:relative}
.nav-toggle span,.nav-toggle span::before,.nav-toggle span::after{position:absolute;left:11px;width:18px;height:2px;background:#fff;content:"";transition:.2s}
.nav-toggle span{top:20px}.nav-toggle span::before{top:-6px;left:0}.nav-toggle span::after{top:6px;left:0}

/* 按钮 */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:10px 20px;border-radius:999px;font-weight:600;font-size:14.5px;border:1px solid transparent;cursor:pointer;transition:.18s;white-space:nowrap}
.btn-primary{background:linear-gradient(135deg,var(--blue-600),var(--teal-500));color:#fff}
.btn-primary:hover{color:#fff;transform:translateY(-1px);box-shadow:0 8px 20px rgba(47,123,255,.35)}
.btn-ghost{border-color:rgba(255,255,255,.3);color:#fff;background:transparent}
.btn-ghost:hover{color:#fff;border-color:var(--teal-400)}
.btn-outline{border-color:var(--blue-600);color:var(--blue-600);background:#fff}
.btn-outline:hover{background:var(--blue-600);color:#fff}
.btn-lg{padding:13px 26px;font-size:15.5px}

/* Hero */
.hero{background:radial-gradient(1000px 500px at 85% -10%,rgba(47,123,255,.35),transparent 60%),radial-gradient(700px 400px at -10% 110%,rgba(25,198,183,.22),transparent 60%),var(--navy-900);color:var(--ice-100);padding:64px 0 34px;overflow:hidden}
.hero h1{color:#fff;margin:14px 0 18px}
.hero h1 em{font-style:normal;background:linear-gradient(90deg,var(--teal-400),var(--blue-500));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero .lead{font-size:17px;color:var(--ice-200);max-width:640px}
.hero-grid{display:grid;grid-template-columns:1.05fr 1fr;gap:44px;align-items:center}
.hero-art{border-radius:18px;overflow:hidden;border:1px solid rgba(255,255,255,.08);box-shadow:0 30px 60px rgba(0,0,0,.35)}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:24px}
.eyebrow{display:inline-block;font-size:12.5px;letter-spacing:.12em;font-weight:700;color:var(--teal-400);text-transform:uppercase}
.prompt-demo{margin-top:24px;background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.12);border-radius:12px;padding:14px 16px;font-size:14px}
.prompt-demo b{color:var(--teal-400);font-size:12px;letter-spacing:.12em;display:block;margin-bottom:4px}
.prompt-demo .typing{color:#fff}
.prompt-demo .typing::after{content:"▍";color:var(--teal-400);animation:blink 1s steps(1) infinite;margin-left:2px}
@keyframes blink{50%{opacity:0}}
.hero-strip{display:grid;grid-template-columns:repeat(6,1fr);gap:10px;margin-top:40px}
.hero-strip div{background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.08);border-radius:12px;padding:12px 14px}
.hero-strip b{display:block;color:#fff;font-size:13.5px}
.hero-strip span{font-size:12.5px;color:var(--ice-200)}
.page-hero{background:linear-gradient(135deg,var(--navy-900),var(--navy-800));color:var(--ice-200);padding:52px 0 44px}
.page-hero h1{color:#fff;margin:10px 0 14px;font-size:clamp(26px,3.4vw,38px)}
.page-hero .lead{max-width:820px;font-size:16.5px}
.page-hero-grid{display:grid;grid-template-columns:1.3fr 1fr;gap:36px;align-items:center}
.page-hero-grid img{border-radius:14px;border:1px solid rgba(255,255,255,.1)}

/* 区块 */
.section{padding:64px 0}
.section-tight{padding:40px 0}
.section-alt{background:var(--bg-alt)}
.section-dark{background:var(--navy-900);color:var(--ice-200)}
.section-dark h2,.section-dark h3,.section-dark h4{color:#fff}
.section-head{margin-bottom:30px;max-width:860px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
.section-kicker{display:inline-block;font-size:12.5px;font-weight:700;letter-spacing:.1em;color:var(--blue-600);background:var(--blue-100);padding:3px 11px;border-radius:999px;margin-bottom:10px}
.section-dark .section-kicker{background:rgba(62,224,207,.12);color:var(--teal-400)}
.grid{display:grid;gap:22px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;transition:.2s}
.card:hover{box-shadow:var(--shadow);border-color:#C5D6F2}
.card .num{display:inline-flex;width:30px;height:30px;border-radius:9px;align-items:center;justify-content:center;background:var(--navy-900);color:var(--teal-400);font-weight:800;font-size:13px;margin-bottom:10px}
.card p{font-size:14.5px;color:var(--text-500)}
.card ul{font-size:14px;color:var(--text-500)}
.card .more{font-size:14px;font-weight:600}

/* 流程链 */
.flow{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin:18px 0 22px}
.flow span{background:var(--blue-50);border:1px solid var(--blue-100);color:var(--navy-800);font-weight:600;font-size:13.5px;padding:7px 13px;border-radius:9px}
.flow i{font-style:normal;color:var(--teal-500);font-weight:700}
.section-dark .flow span{background:rgba(255,255,255,.06);border-color:rgba(255,255,255,.12);color:#fff}
.flow-vertical{display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:10px;counter-reset:st}
.flow-vertical div{position:relative;background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.12);border-radius:12px;padding:14px 12px 12px;counter-increment:st}
.flow-vertical div::before{content:counter(st,decimal-leading-zero);display:block;font-size:11px;color:var(--teal-400);font-weight:700;letter-spacing:.1em}
.flow-vertical b{color:#fff;font-size:14px;display:block}
.flow-vertical small{font-size:12.5px;color:var(--ice-200)}

/* 技术矩阵 */
.matrix-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:12px}
.matrix-item{background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.09);border-radius:12px;padding:16px}
.matrix-item h4{font-size:14.5px;margin-bottom:4px;color:#fff}
.matrix-item p{font-size:13px;color:var(--ice-200);margin:0;line-height:1.65}
.matrix-item .grp{font-size:11px;letter-spacing:.1em;color:var(--teal-400);font-weight:700}
.matrix-item.g-ugc{border-left:3px solid var(--teal-500)}
.matrix-item.g-mod{border-left:3px solid var(--purple-500)}
.matrix-item.g-ai{border-left:3px solid var(--blue-500)}
.matrix-item.g-adapt{border-left:3px solid var(--orange-500)}
.matrix-item.g-engine{border-left:3px solid #fff}

/* 特性行 */
.feature-row{display:grid;grid-template-columns:1.1fr .9fr;gap:40px;align-items:center;padding:26px 0;border-bottom:1px dashed var(--line)}
.feature-row:last-child{border-bottom:0}
.feature-row.reverse>div:first-child{order:2}
.feature-row .fig img{border-radius:14px;box-shadow:var(--shadow)}
.feature-row h3{font-size:21px}

/* 文章卡片 */
.article-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;display:flex;flex-direction:column;transition:.2s}
.article-card:hover{box-shadow:var(--shadow);transform:translateY(-2px)}
.article-card .thumb{display:block;aspect-ratio:16/10;background:var(--navy-900);overflow:hidden}
.article-card .thumb img{width:100%;height:100%;object-fit:cover}
.article-card .body{padding:18px 20px 20px;display:flex;flex-direction:column;flex:1}
.article-card h3{font-size:17px;margin-bottom:8px}
.article-card h3 a{color:var(--text-900)}
.article-card h3 a:hover{color:var(--blue-600)}
.meta-row{display:flex;flex-wrap:wrap;gap:6px 12px;font-size:12.5px;color:var(--text-400);margin-bottom:8px}
.meta-row .cat{color:var(--blue-600);font-weight:600}
.excerpt{font-size:14.2px;color:var(--text-500);line-height:1.8}
.tag-row{display:flex;flex-wrap:wrap;gap:6px;margin:4px 0 12px}
.tag{font-size:12px;padding:3px 9px;border-radius:999px;background:var(--blue-50);color:var(--navy-700);border:1px solid var(--blue-100)}
.read-more{font-weight:600;font-size:14px;margin-top:auto}
.article-card.wide{display:grid;grid-template-columns:320px 1fr}
.article-card.wide .thumb{aspect-ratio:auto;height:100%}
.core-label{display:inline-block;font-size:11px;font-weight:700;color:#fff;background:var(--orange-500);border-radius:6px;padding:1px 7px;margin-right:6px;vertical-align:2px}
.official-label{background:var(--purple-500)}
.list-compact .article-card .excerpt{font-size:13.8px}

/* 面包屑 & 文章 */
.breadcrumb{background:var(--bg-alt);border-bottom:1px solid var(--line);font-size:13.5px;padding:11px 0;color:var(--text-500)}
.breadcrumb a{color:var(--text-500)}
.breadcrumb a:hover{color:var(--blue-600)}
.breadcrumb .sep{margin:0 8px;color:var(--text-400)}
.breadcrumb .current{color:var(--text-900)}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:48px;padding:40px 0 64px}
.article-head h1{font-size:clamp(25px,3vw,34px);margin:10px 0 16px}
.article-cat a{display:inline-block;font-size:13px;font-weight:700;color:var(--blue-600);background:var(--blue-100);padding:3px 12px;border-radius:999px}
.article-meta{display:flex;flex-wrap:wrap;gap:8px 18px;align-items:center;font-size:13.5px;color:var(--text-500);padding-bottom:18px;border-bottom:1px solid var(--line);margin-bottom:24px}
.article-meta .author{display:flex;align-items:center;gap:8px;font-weight:600;color:var(--text-900)}
.article-meta .avatar{width:30px;height:30px;border-radius:50%}
.article-lead{font-size:17px;color:var(--text-900);background:linear-gradient(135deg,var(--blue-50),#fff);border-left:4px solid var(--teal-500);padding:16px 20px;border-radius:0 12px 12px 0;margin-bottom:26px}
.article-cover{border-radius:14px;margin-bottom:26px;border:1px solid var(--line)}
.article-body{font-size:16.5px;line-height:1.95}
.article-body h2{font-size:23px;margin:38px 0 14px;padding-left:12px;border-left:4px solid var(--blue-600)}
.article-body h3{font-size:18.5px;margin:26px 0 10px}
.article-body p{margin-bottom:18px}
.article-body li{margin-bottom:8px}
.article-body a{border-bottom:1px solid rgba(47,123,255,.35)}
.callout{background:var(--navy-900);color:var(--ice-100);border-radius:12px;padding:16px 20px;margin:22px 0;font-size:15.5px}
.callout::before{content:"关键判断";display:block;font-size:11.5px;font-weight:700;letter-spacing:.12em;color:var(--teal-400);margin-bottom:4px}
.case-box{border:1px solid var(--line);background:var(--bg-alt);border-radius:14px;padding:18px 22px;margin:24px 0}
.case-box h4{font-size:15.5px;margin-bottom:10px;color:var(--navy-800)}
.case-box h4::before{content:"模拟案例";font-size:11px;background:var(--orange-500);color:#fff;border-radius:6px;padding:2px 7px;margin-right:8px;vertical-align:2px}
.case-box p:last-child,.case-box ul:last-child{margin-bottom:0}
.data-table{width:100%;border-collapse:collapse;margin:18px 0 24px;font-size:14.5px}
.data-table th,.data-table td{border:1px solid var(--line);padding:9px 12px;text-align:left;vertical-align:top}
.data-table th{background:var(--navy-900);color:#fff;font-weight:600}
.data-table tr:nth-child(even) td{background:var(--bg-alt)}
.table-wrap{overflow-x:auto}
.article-tags{display:flex;flex-wrap:wrap;gap:8px;margin:30px 0 8px}
.related-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:16px;margin-top:16px}
.related-grid .article-card .body{padding:14px 16px}
.related-cats{display:flex;flex-wrap:wrap;gap:10px;margin-top:14px}
.related-cats a{border:1px solid var(--line);border-radius:10px;padding:8px 14px;font-size:14px;color:var(--text-700);background:#fff}
.related-cats a:hover{border-color:var(--blue-600);color:var(--blue-600)}
aside .sidebar-box{border:1px solid var(--line);border-radius:14px;padding:18px;margin-bottom:18px;background:#fff}
aside .sidebar-box h4{font-size:15px;margin-bottom:10px}
.sticky-side{position:sticky;top:90px}
.mini-card{display:flex;gap:10px;padding:9px 0;border-bottom:1px dashed var(--line);font-size:14px;line-height:1.55}
.mini-card:last-of-type{border-bottom:0}
.mini-card .n{flex:0 0 22px;height:22px;border-radius:6px;background:var(--navy-900);color:var(--teal-400);font-size:12px;font-weight:700;display:flex;align-items:center;justify-content:center}
.mini-card a{color:var(--text-700)}
.mini-card a:hover{color:var(--blue-600)}
.toc a{display:block;font-size:13.5px;color:var(--text-500);padding:4px 0}
.toc a:hover{color:var(--blue-600)}

/* 作者页 */
.author-hero{display:flex;gap:26px;align-items:center}
.avatar-lg{width:108px;height:108px;border-radius:50%;flex:0 0 108px;box-shadow:var(--shadow)}
.author-focus{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
.doc-page h2{margin-top:36px}
.doc-page h2:first-child{margin-top:0}
.checklist{list-style:none;padding:0}
.checklist li{padding-left:28px;position:relative;margin-bottom:10px}
.checklist li::before{content:"";position:absolute;left:4px;top:9px;width:12px;height:12px;border-radius:4px;background:linear-gradient(135deg,var(--blue-600),var(--teal-500))}

/* FAQ */
.faq{max-width:860px;margin:0 auto}
.faq-item{border:1px solid var(--line);border-radius:12px;margin-bottom:10px;background:#fff;overflow:hidden}
.faq-q{width:100%;text-align:left;background:none;border:0;padding:16px 48px 16px 20px;font-size:16px;font-weight:600;color:var(--text-900);cursor:pointer;position:relative;font-family:inherit}
.faq-q::after{content:"+";position:absolute;right:20px;top:12px;font-size:22px;color:var(--blue-600);transition:.2s}
.faq-item.open .faq-q::after{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease}
.faq-item.open .faq-a{max-height:600px}
.faq-a-inner{padding:0 20px 18px;color:var(--text-500);font-size:15px}

/* 设备 & 表单 & 搜索 */
.device-list{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.device-list div{border:1px solid var(--line);border-radius:12px;padding:16px;background:#fff}
.device-list b{display:block;color:var(--text-900);margin-bottom:4px}
.device-list span{font-size:14px;color:var(--text-500)}
.keyword-cloud{display:flex;flex-wrap:wrap;gap:8px}
.keyword-cloud a{font-size:13.5px;border:1px solid var(--line);border-radius:999px;padding:5px 13px;color:var(--text-700);background:#fff}
.keyword-cloud a:hover{border-color:var(--teal-500);color:var(--teal-500)}
.form-card{max-width:460px;margin:0 auto;background:#fff;border:1px solid var(--line);border-radius:16px;padding:30px;box-shadow:var(--shadow)}
.form-card label{display:block;font-size:14px;font-weight:600;margin:14px 0 6px;color:var(--text-900)}
.form-card input,.search-box input{width:100%;padding:11px 14px;border:1px solid var(--line);border-radius:10px;font-size:15px;font-family:inherit}
.form-card input:focus,.search-box input:focus{outline:2px solid var(--blue-100);border-color:var(--blue-600)}
.form-note{font-size:13px;color:var(--text-400);margin-top:12px}
.search-box{display:flex;gap:10px;margin:22px 0 28px}
.search-result{padding:18px 0;border-bottom:1px solid var(--line)}
.search-result .url{font-size:12.5px;color:var(--teal-500)}
.search-result h3{font-size:17px;margin:3px 0 4px}
.search-result p{font-size:14.5px;color:var(--text-500);margin:0}
.step-list{counter-reset:s;list-style:none;padding:0}
.step-list li{counter-increment:s;position:relative;padding:0 0 18px 50px}
.step-list li::before{content:counter(s);position:absolute;left:0;top:0;width:34px;height:34px;border-radius:10px;background:var(--navy-900);color:var(--teal-400);font-weight:800;display:flex;align-items:center;justify-content:center}
.step-list b{color:var(--text-900)}
.info-table{width:100%;border-collapse:collapse;font-size:14.5px}
.info-table th,.info-table td{border-bottom:1px solid var(--line);padding:11px 10px;text-align:left;vertical-align:top}
.info-table th{width:150px;color:var(--text-900)}

/* CTA */
.cta-band{background:linear-gradient(120deg,var(--navy-900),var(--navy-700) 60%,#243f8a);border-radius:20px;padding:44px;color:var(--ice-200);text-align:center;position:relative;overflow:hidden}
.cta-band::after{content:"";position:absolute;right:-60px;top:-60px;width:220px;height:220px;border-radius:50%;border:30px solid rgba(62,224,207,.12)}
.cta-band h2{color:#fff}
.cta-actions{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-top:20px}

/* 统计条 */
.stat-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.stat-strip div{background:#fff;border:1px solid var(--line);border-radius:12px;padding:18px}
.stat-strip b{display:block;font-size:26px;color:var(--navy-800)}
.stat-strip span{font-size:13.5px;color:var(--text-500)}

/* Footer */
.site-footer{background:var(--navy-950);color:var(--ice-200);padding:54px 0 26px;font-size:14px}
.footer-grid{display:grid;grid-template-columns:1.5fr repeat(4,1fr);gap:30px}
.footer-brand p{margin-top:12px;font-size:13.5px;color:var(--ice-200)}
.footer-col h5{color:#fff;font-size:14.5px;margin-bottom:12px}
.footer-col ul{list-style:none;padding:0}
.footer-col li{margin-bottom:7px}
.footer-col a,.footer-bottom a{color:var(--ice-200)}
.footer-col a:hover,.footer-bottom a:hover{color:var(--teal-400)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.08);margin-top:36px;padding-top:20px;display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;font-size:13px}
.back-to-top{position:fixed;right:22px;bottom:22px;width:44px;height:44px;border-radius:12px;border:0;background:var(--blue-600);color:#fff;font-size:18px;cursor:pointer;opacity:0;pointer-events:none;transition:.2s;box-shadow:0 8px 20px rgba(47,123,255,.4);z-index:40}
.back-to-top.show{opacity:1;pointer-events:auto}
.filter-bar{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:22px}
.filter-bar button{border:1px solid var(--line);background:#fff;border-radius:999px;padding:6px 14px;font-size:13.5px;cursor:pointer;font-family:inherit;color:var(--text-700)}
.filter-bar button.active{background:var(--navy-900);color:#fff;border-color:var(--navy-900)}

/* 响应式 */
@media (max-width:1480px){
  .header-actions{display:none}
  .main-nav a{font-size:13.5px;padding:8px 9px}
}
@media (max-width:1240px){
  .nav-toggle{display:block;margin-left:auto}
  .main-nav{display:none;position:absolute;left:0;right:0;top:66px;flex-direction:column;background:var(--navy-900);padding:10px 20px 18px;border-bottom:1px solid rgba(255,255,255,.08)}
  .site-header.is-open .main-nav{display:flex}
  .main-nav a{font-size:15px;padding:10px 12px}
}
@media (max-width:1024px){
  .hero-grid,.page-hero-grid{grid-template-columns:1fr}
  .hero-strip{grid-template-columns:repeat(3,1fr)}
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .article-layout{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
  .footer-brand{grid-column:1/-1}
  .article-card.wide{grid-template-columns:1fr}
  .article-card.wide .thumb{aspect-ratio:16/10}
  .device-list{grid-template-columns:repeat(2,1fr)}
  .sticky-side{position:static}
}
@media (max-width:680px){
  .section{padding:44px 0}
  .grid-2,.grid-3,.grid-4,.device-list,.stat-strip{grid-template-columns:1fr}
  .hero-strip{grid-template-columns:repeat(2,1fr)}
  .feature-row{grid-template-columns:1fr;gap:18px}
  .feature-row.reverse>div:first-child{order:0}
  .author-hero{flex-direction:column;align-items:flex-start}
  .cta-band{padding:30px 20px}
  .topbar .wrap span:last-child{display:none}
  .footer-grid{grid-template-columns:1fr}
  .search-box{flex-direction:column}
}