/* 深圳市海微电子 官网样式 */
:root{
  --navy:#0e1b33;--line:#e3e9f2;--text:#22304a;--muted:#6b7a93;
  --brand:#1e6fd9;--cyan:#18b6c8;--bg:#f6f8fb;--radius:14px;
  --shadow:0 10px 30px rgba(15,32,60,.08);--shadow-lg:0 18px 50px rgba(15,32,60,.14);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB",Arial,sans-serif;color:var(--text);background:var(--bg);line-height:1.7;font-size:16px;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul{list-style:none}
.wrap{width:100%;max-width:1180px;margin:0 auto;padding:0 22px}

/* 顶栏 */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.94);backdrop-filter:saturate(160%) blur(8px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:68px}
.brand{display:flex;align-items:center;gap:10px}
.brand-mark{width:36px;height:36px;border-radius:10px;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:15px;background:linear-gradient(135deg,var(--brand),var(--cyan));box-shadow:0 6px 16px rgba(30,111,217,.32)}
.brand-text strong{display:block;font-size:17px;color:var(--navy);letter-spacing:.5px}
.brand-text span{display:block;font-size:10.5px;color:var(--muted);letter-spacing:1.4px;text-transform:uppercase}
.brand .logo{height:32px;width:auto}
.brand-text{padding-left:12px;border-left:1px solid var(--line)}
.logo-light{height:24px;width:auto}
.footer-brand .logo{margin-right:10px}
.feature-row{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:26px}
.feature{display:flex;align-items:center;gap:10px;background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px 16px;font-size:14.5px;color:var(--navy);font-weight:600}
.feature svg{width:22px;height:22px;flex:0 0 auto;fill:none;stroke:var(--brand);stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.nav-links{display:flex;align-items:center;gap:4px}
.nav-links a{padding:8px 14px;border-radius:8px;font-size:15px;color:#3a4a66;transition:background .18s,color .18s}
.nav-links a:hover{background:#eef4fd;color:var(--brand)}
.nav-cta{display:inline-flex;align-items:center;gap:6px;padding:9px 18px!important;border-radius:999px!important;background:linear-gradient(135deg,var(--brand),#2c8ae8);color:#fff!important;font-weight:600;box-shadow:0 8px 20px rgba(30,111,217,.28)}
.nav-cta:hover{filter:brightness(1.06)}
.nav-toggle{display:none;width:42px;height:38px;border:1px solid var(--line);border-radius:10px;background:#fff;cursor:pointer;align-items:center;justify-content:center}
.nav-toggle span,.nav-toggle span::before,.nav-toggle span::after{display:block;width:18px;height:2px;background:var(--navy);position:relative}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}

/* Hero */
.hero{position:relative;overflow:hidden;color:#fff;background:radial-gradient(900px 420px at 82% 8%,rgba(24,182,200,.28),transparent 62%),radial-gradient(700px 380px at 8% 92%,rgba(30,111,217,.34),transparent 60%),linear-gradient(160deg,#0a1626 0%,#0e1b33 55%,#122745 100%)}
.hero::after{content:"";position:absolute;inset:0;opacity:.16;pointer-events:none;background-image:linear-gradient(rgba(255,255,255,.14) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.14) 1px,transparent 1px);background-size:46px 46px;-webkit-mask-image:radial-gradient(circle at 70% 20%,#000 0%,transparent 72%);mask-image:radial-gradient(circle at 70% 20%,#000 0%,transparent 72%)}
.hero-inner{position:relative;z-index:2;padding:84px 0 88px;display:grid;grid-template-columns:1.15fr .85fr;gap:46px;align-items:center}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;letter-spacing:1px;color:#9fd0ff;border:1px solid rgba(120,190,255,.35);background:rgba(30,111,217,.16);padding:5px 14px;border-radius:999px;margin-bottom:22px}
.eyebrow i{width:6px;height:6px;border-radius:50%;background:var(--cyan)}
.hero h1{font-size:42px;line-height:1.3;letter-spacing:.5px;margin-bottom:18px}
.hero h1 em{font-style:normal;color:#6fc8ff}
.hero p.lead{font-size:16.5px;color:#b9c9dd;max-width:560px;margin-bottom:30px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:32px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 26px;border-radius:999px;font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;transition:transform .16s,box-shadow .16s,background .16s}
.btn:hover{transform:translateY(-1px)}
.btn-primary{background:linear-gradient(135deg,#2c8ae8,var(--brand));color:#fff;box-shadow:0 12px 26px rgba(30,111,217,.38)}
.btn-ghost{border-color:rgba(255,255,255,.3);color:#fff;background:rgba(255,255,255,.06)}
.btn-ghost:hover{background:rgba(255,255,255,.14)}
.btn-line{border-color:var(--line);background:#fff;color:var(--brand)}
.btn-line:hover{border-color:var(--brand)}
.hero-stats{display:flex;flex-wrap:wrap;gap:34px}
.hero-stats strong{display:block;font-size:26px;color:#fff;letter-spacing:.5px}
.hero-stats span{font-size:13px;color:#93a8c2}
.hero-panel{position:relative;border-radius:20px;padding:26px;background:linear-gradient(160deg,rgba(255,255,255,.1),rgba(255,255,255,.03));border:1px solid rgba(140,195,255,.22);box-shadow:0 30px 60px rgba(0,0,0,.35)}
.hero-panel h3{font-size:13.5px;letter-spacing:1px;color:#8fb6dd;font-weight:600;margin-bottom:16px}
.io-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin-bottom:18px}
.io-grid i{height:26px;border-radius:6px;background:linear-gradient(180deg,rgba(111,200,255,.5),rgba(30,111,217,.25));border:1px solid rgba(140,200,255,.3)}
.io-grid i.on{background:linear-gradient(180deg,#7ef0c0,#21b183);border-color:#7ef0c0}
.hero-panel .row{display:flex;justify-content:space-between;font-size:13px;color:#a9c0d8;padding:6px 0;border-top:1px dashed rgba(150,190,230,.18)}
.hero-panel .row b{color:#d6ecff;font-weight:500}

/* 区块 */
.section{padding:72px 0}
.section.alt{background:#fff}
.section-head{max-width:720px;margin-bottom:38px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
.section-tag{font-size:12.5px;letter-spacing:2px;color:var(--brand);font-weight:700;text-transform:uppercase}
.section-head h2{font-size:29px;color:var(--navy);margin:10px 0 12px;letter-spacing:.5px}
.section-head p{color:var(--muted);font-size:15.5px}
.grid{display:grid;gap:20px}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px 24px;transition:transform .18s,box-shadow .18s,border-color .18s}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);border-color:#cfe0f7}
.card .ico{width:44px;height:44px;border-radius:12px;margin-bottom:16px;display:flex;align-items:center;justify-content:center;background:#eaf2fd;color:var(--brand);font-size:19px;font-weight:700}
.card h3{font-size:17.5px;color:var(--navy);margin-bottom:9px}
.card p{font-size:14.5px;color:var(--muted)}
.card ul{margin-top:14px}
.card ul li{position:relative;padding-left:16px;font-size:14px;color:#4a5b76;margin-bottom:6px}
.card ul li::before{content:"";position:absolute;left:0;top:9px;width:6px;height:6px;border-radius:50%;background:#b9d4f7}

/* 产品 */
.product-list{display:grid;gap:18px}
.product{display:grid;grid-template-columns:92px 1fr auto;gap:22px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px 26px;transition:box-shadow .18s,border-color .18s}
.product:hover{box-shadow:var(--shadow);border-color:#cfe0f7}
.product .thumb{width:92px;height:68px;border-radius:10px;background:linear-gradient(150deg,#eef6ff,#dbeafd);border:1px solid #d6e6fa;display:flex;align-items:center;justify-content:center;color:var(--brand);font-weight:700;font-size:13px;letter-spacing:.5px;text-align:center}
.product h3{font-size:17px;color:var(--navy);margin-bottom:6px}
.product p{font-size:14px;color:var(--muted)}
.product .tags{display:flex;flex-wrap:wrap;gap:6px;margin-top:10px}
.product .tags span{font-size:12px;color:#456;background:#f1f5fb;border:1px solid var(--line);border-radius:999px;padding:2px 10px}
.product .go{font-size:14px;color:var(--brand);white-space:nowrap;font-weight:600}

/* 下载中心 */
.dl-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;flex-wrap:wrap;margin-bottom:24px}
.dl-tabs{display:flex;flex-wrap:wrap;gap:8px}
.dl-tabs a{font-size:14px;padding:7px 16px;border-radius:999px;background:#fff;border:1px solid var(--line);color:#4a5b76}
.dl-tabs a.active,.dl-tabs a:hover{background:var(--brand);border-color:var(--brand);color:#fff}
.dl-list{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.dl-item{display:grid;grid-template-columns:1fr 120px 92px 112px 92px;gap:14px;align-items:center;padding:15px 22px;border-bottom:1px solid #eef2f8;font-size:14.5px}
.dl-item:last-child{border-bottom:0}
.dl-item:hover{background:#f8fbff}
.dl-item.head{background:#f8fafd;color:var(--muted);font-size:12.5px;letter-spacing:.5px;font-weight:600}
.dl-item .name{display:flex;align-items:center;gap:10px;color:var(--navy);font-weight:600;min-width:0}
.dl-item .name>div{min-width:0}
.dl-item .name .txt{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.dl-item .name .ext{flex:0 0 auto;font-size:11px;font-weight:700;color:#fff;background:#9fb3cd;border-radius:5px;padding:2px 6px;letter-spacing:.5px;text-transform:uppercase}
.dl-item .name .ext.pdf{background:#e05a4f}
.dl-item .name .ext.zip,.dl-item .name .ext.rar,.dl-item .name .ext.7z{background:#e0a13a}
.dl-item .name .ext.exe,.dl-item .name .ext.msi{background:#3f8ee0}
.dl-item .name .ext.hex,.dl-item .name .ext.bin{background:#4aab8b}
.dl-item .name small{display:block;font-weight:400;font-size:12.5px;color:var(--muted);margin-top:2px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.dl-item .meta{color:var(--muted);font-size:13px}
.dl-item .btn-mini{justify-self:end;font-size:13px;font-weight:600;color:var(--brand);border:1px solid #cfe0f7;background:#f2f8ff;border-radius:8px;padding:6px 14px}
.dl-item .btn-mini:hover{background:var(--brand);color:#fff;border-color:var(--brand)}
.empty{background:#fff;border:1px dashed #cfdcee;border-radius:var(--radius);padding:44px 24px;text-align:center;color:var(--muted)}
.empty strong{display:block;color:var(--navy);font-size:16px;margin-bottom:8px}
.searchbar{display:flex;gap:10px;margin-bottom:18px}
.searchbar input{flex:1;min-width:0;padding:11px 16px;font-size:14.5px;color:var(--text);border:1px solid var(--line);border-radius:10px;background:#fff;outline:none}
.searchbar input:focus{border-color:#a9c9f0;box-shadow:0 0 0 3px rgba(30,111,217,.1)}
.searchbar button{padding:0 22px;border:0;border-radius:10px;background:var(--brand);color:#fff;font-size:14.5px;font-weight:600;cursor:pointer}
.hint{font-size:13px;color:var(--muted);margin-top:14px}

/* AI 问答 */
.ai-section{background:linear-gradient(160deg,#0d1a2e,#12294a);color:#fff;position:relative;overflow:hidden}
.ai-section::after{content:"";position:absolute;right:-120px;top:-120px;width:420px;height:420px;border-radius:50%;background:radial-gradient(circle,rgba(24,182,200,.28),transparent 66%)}
.ai-wrap{position:relative;z-index:2;display:grid;grid-template-columns:.95fr 1.05fr;gap:44px;align-items:center}
.ai-copy .section-tag{color:#6fc8ff}
.ai-copy h2{font-size:29px;margin:10px 0 14px;letter-spacing:.5px}
.ai-copy p{color:#b9c9dd;font-size:15.5px;margin-bottom:22px}
.ai-copy ul li{position:relative;padding-left:20px;color:#a9c0d8;font-size:14.5px;margin-bottom:8px}
.ai-copy ul li::before{content:"›";position:absolute;left:4px;top:-2px;color:#6fc8ff;font-size:18px}
.ai-box{background:rgba(255,255,255,.07);border:1px solid rgba(140,195,255,.24);border-radius:18px;padding:20px;box-shadow:0 26px 60px rgba(0,0,0,.35)}
.ai-log{max-height:260px;overflow-y:auto;display:flex;flex-direction:column;gap:12px;margin-bottom:14px;padding-right:4px}
.msg{max-width:88%;padding:11px 15px;border-radius:12px;font-size:14.5px;line-height:1.65;white-space:pre-wrap;word-break:break-word}
.msg.bot{background:rgba(255,255,255,.12);color:#e8f2ff;border-top-left-radius:4px;align-self:flex-start}
.msg.me{background:linear-gradient(135deg,#2c8ae8,var(--brand));color:#fff;border-top-right-radius:4px;align-self:flex-end}
.msg .src{display:block;margin-top:6px;font-size:11.5px;color:#9fd0ff;opacity:.9}
.ai-form{display:flex;gap:8px}
.ai-form input{flex:1;min-width:0;padding:12px 15px;border-radius:10px;border:1px solid rgba(160,200,240,.28);background:rgba(0,0,0,.22);color:#fff;font-size:14.5px;outline:none}
.ai-form input::placeholder{color:#7d93ad}
.ai-form input:focus{border-color:#6fc8ff}
.ai-form button{padding:0 20px;border:0;border-radius:10px;background:linear-gradient(135deg,#2c8ae8,var(--brand));color:#fff;font-weight:600;font-size:14.5px;cursor:pointer}
.ai-form button:disabled{opacity:.6;cursor:default}

/* 关于 / 联系 */
.about-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:34px;align-items:start}
.about-text p{color:#4a5b76;font-size:15.5px;margin-bottom:14px}
.about-facts{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin-top:22px}
.fact{background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px 18px}
.fact strong{display:block;color:var(--navy);font-size:15px;margin-bottom:4px}
.fact span{font-size:13.5px;color:var(--muted)}
.contact-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow)}
.contact-card h3{font-size:18px;color:var(--navy);margin-bottom:16px}
.contact-row{display:flex;gap:12px;padding:12px 0;border-bottom:1px dashed #e8eef7;font-size:14.5px}
.contact-row:last-of-type{border-bottom:0}
.contact-row .k{width:66px;flex:0 0 auto;color:var(--muted);font-size:13.5px}
.contact-row .v{color:var(--navy);font-weight:600}
.contact-row .v a{color:var(--brand)}
.qr{display:flex;gap:16px;align-items:center;margin-top:18px;padding-top:18px;border-top:1px solid var(--line)}
.qr img{width:104px;height:104px;border-radius:10px;border:1px solid var(--line);object-fit:cover}
.qr p{font-size:13px;color:var(--muted)}

/* 页脚 */
.site-footer{background:#0b1524;color:#8fa3bb;padding:44px 0 26px;font-size:14px}
.footer-top{display:flex;justify-content:space-between;gap:30px;flex-wrap:wrap;padding-bottom:26px;border-bottom:1px solid rgba(255,255,255,.08)}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:12px}
.footer-brand strong{color:#fff;font-size:16px;letter-spacing:.5px}
.footer-links{display:flex;flex-wrap:wrap;gap:26px}
.footer-links a:hover{color:#fff}
.footer-bottom{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;padding-top:20px;font-size:13px;color:#6d819a}
.footer-bottom a{color:#6d819a}

/* 内页头部 */
.page-hero{position:relative;overflow:hidden;color:#fff;background:radial-gradient(800px 360px at 85% 0%,rgba(24,182,200,.26),transparent 62%),linear-gradient(160deg,#0a1626,#0e1b33 60%,#132a4a)}
.page-hero::after{content:"";position:absolute;inset:0;opacity:.14;pointer-events:none;background-image:linear-gradient(rgba(255,255,255,.14) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.14) 1px,transparent 1px);background-size:44px 44px;-webkit-mask-image:radial-gradient(circle at 75% 10%,#000 0%,transparent 70%);mask-image:radial-gradient(circle at 75% 10%,#000 0%,transparent 70%)}
.page-hero .wrap{position:relative;z-index:2;padding:64px 22px 68px}
.page-hero h1{font-size:38px;letter-spacing:.5px;margin-bottom:16px}
.page-hero p.lead{font-size:16.5px;color:#b9c9dd;max-width:720px;margin-bottom:26px}

/* 检测流程 */
.flow{display:grid;grid-template-columns:repeat(5,1fr);gap:14px}
.flow-step{position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:20px 18px}
.flow-step b{display:block;font-size:12px;letter-spacing:1px;color:var(--brand);margin-bottom:8px}
.flow-step strong{display:block;font-size:15.5px;color:var(--navy);margin-bottom:8px}
.flow-step span{font-size:13.5px;color:var(--muted);line-height:1.6}

/* 架构 */
.arch{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.arch-box{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px}
.arch-box h3{font-size:16px;color:var(--navy);margin-bottom:12px;padding-left:12px;border-left:3px solid var(--brand)}
.arch-box ul li{position:relative;padding-left:16px;font-size:14px;color:#4a5b76;margin-bottom:8px}
.arch-box ul li::before{content:"";position:absolute;left:0;top:9px;width:6px;height:6px;border-radius:50%;background:#b9d4f7}

/* 对比表 */
.compare{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.cmp-row{display:grid;grid-template-columns:.9fr 1.2fr 1.2fr;gap:16px;padding:15px 22px;border-bottom:1px solid #eef2f8;font-size:14.5px;color:#4a5b76}
.cmp-row:last-child{border-bottom:0}
.cmp-row>div:first-child{color:var(--navy);font-weight:600}
.cmp-row>div:last-child{color:#116b4f;font-weight:600}
.cmp-row.head{background:#f8fafd;color:var(--muted);font-size:13px;font-weight:600}
.cmp-row.head>div{color:var(--muted)!important;font-weight:600}

/* CTA 条 */
.cta-band{display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap;margin-top:34px;padding:28px 32px;border-radius:var(--radius);color:#fff;background:linear-gradient(135deg,#12294a,#1e6fd9)}
.cta-band h3{font-size:19px;margin-bottom:6px}
.cta-band p{font-size:14.5px;color:#cfe0f7}
.cta-band .btn-primary{background:#fff;color:var(--brand);box-shadow:0 10px 24px rgba(0,0,0,.18)}

/* Markdown 文档页 */
.doc-wrap{padding:36px 0 60px}
.doc-bar{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-bottom:22px}
.doc-tabs{display:flex;flex-wrap:wrap;gap:8px}
.doc-tabs a{font-size:14px;padding:7px 15px;border-radius:999px;background:#fff;border:1px solid var(--line);color:#4a5b76}
.doc-tabs a.active,.doc-tabs a:hover{background:var(--brand);border-color:var(--brand);color:#fff}
.doc-actions{display:flex;align-items:center;gap:12px;font-size:13px}
.doc-actions a{color:var(--brand)}
.ai-badge{font-size:12px;font-weight:700;letter-spacing:.5px;color:#0f7a5a;background:#e7f7f0;border:1px solid #b6e6d3;border-radius:999px;padding:4px 12px}
.doc{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:40px 46px;box-shadow:var(--shadow);max-width:900px}
.doc h1{font-size:30px;color:var(--navy);margin:0 0 18px;letter-spacing:.5px;line-height:1.35}
.doc h2{font-size:22px;color:var(--navy);margin:34px 0 14px;padding-bottom:8px;border-bottom:1px solid var(--line)}
.doc h3{font-size:17px;color:var(--navy);margin:24px 0 10px}
.doc h4{font-size:15.5px;color:var(--navy);margin:20px 0 8px}
.doc p{font-size:15.5px;color:#3a4a66;margin:0 0 14px}
.doc ul,.doc ol{margin:0 0 16px 0;padding-left:22px}
.doc ul li{list-style:disc;font-size:15px;color:#3a4a66;margin-bottom:7px}
.doc ol li{list-style:decimal;font-size:15px;color:#3a4a66;margin-bottom:7px}
.doc a{color:var(--brand);border-bottom:1px solid rgba(30,111,217,.25)}
.doc a:hover{border-bottom-color:var(--brand)}
.doc strong{color:var(--navy)}
.doc blockquote{margin:0 0 18px;padding:14px 18px;background:#f4f8fe;border-left:3px solid var(--brand);border-radius:6px;color:#3a4a66;font-size:15px}
.doc blockquote p{margin:0}
.doc code{font-family:Consolas,Monaco,monospace;font-size:13.5px;background:#f1f5fb;border:1px solid #e3e9f2;border-radius:4px;padding:1px 5px;color:#b4235a}
.doc pre{background:#0f1c30;color:#dbe8f7;border-radius:10px;padding:16px 18px;overflow:auto;margin:0 0 18px}
.doc pre code{background:none;border:0;color:inherit;padding:0;font-size:13px}
.doc hr{border:0;border-top:1px solid var(--line);margin:30px 0}
.md-table{overflow-x:auto;margin:0 0 18px}
.doc table{width:100%;border-collapse:collapse;font-size:14.5px}
.doc th,.doc td{border:1px solid var(--line);padding:10px 14px;text-align:left;vertical-align:top}
.doc th{background:#f6f9fd;color:var(--navy);font-weight:600;white-space:nowrap}
.doc td{color:#3a4a66}
.doc tbody tr:nth-child(even){background:#fbfcfe}

/* 返回顶部 */
.to-top{position:fixed;right:20px;bottom:22px;width:42px;height:42px;border-radius:50%;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);color:var(--brand);display:none;align-items:center;justify-content:center;cursor:pointer;z-index:60;font-size:18px}
.to-top.show{display:flex}

/* 响应式 */
@media(max-width:980px){
  .hero-inner{grid-template-columns:1fr;padding:60px 0 64px;gap:36px}
  .hero h1{font-size:34px}
  .ai-wrap{grid-template-columns:1fr;gap:30px}
  .about-grid{grid-template-columns:1fr}
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .dl-item{grid-template-columns:1fr 100px 92px}
  .dl-item .meta.date,.dl-item .meta.ver{display:none}
  .page-hero h1{font-size:30px}
  .page-hero .wrap{padding:48px 22px 52px}
  .flow{grid-template-columns:repeat(2,1fr)}
  .arch{grid-template-columns:1fr}
  .cmp-row{grid-template-columns:1fr;gap:4px;padding:14px 18px}
  .cmp-row.head{display:none}
  .cmp-row>div:nth-child(2)::before{content:"传统：";color:var(--muted)}
  .cmp-row>div:nth-child(3)::before{content:"海微：";color:#116b4f}
}
@media(max-width:720px){
  .nav-links{display:none;position:absolute;top:68px;left:0;right:0;background:#fff;border-bottom:1px solid var(--line);flex-direction:column;align-items:stretch;gap:0;padding:8px 14px 16px;box-shadow:var(--shadow)}
  .nav-links.open{display:flex}
  .nav-links a{padding:12px 10px;border-radius:8px}
  .nav-toggle{display:flex}
  .hero h1{font-size:28px}
  .hero p.lead{font-size:15px}
  .hero-stats{gap:22px}
  .grid-3,.grid-4,.grid-2{grid-template-columns:1fr}
  .feature-row{grid-template-columns:repeat(2,1fr);gap:10px}
  .feature{padding:12px 14px;font-size:13.5px}
  .brand .logo{height:28px}
  .brand-text span{font-size:9.5px;letter-spacing:.8px}
  .product{grid-template-columns:1fr;gap:14px}
  .product .thumb{width:100%;height:56px}
  .section{padding:52px 0}
  .section-head h2{font-size:24px}
  .dl-item{grid-template-columns:1fr auto;padding:14px 16px}
  .dl-item .meta{display:none}
  .about-facts{grid-template-columns:1fr}
  .doc{padding:24px 20px}
  .doc h1{font-size:23px}
  .doc h2{font-size:19px}
  .doc p,.doc ul li,.doc ol li{font-size:14.5px}
  .doc-wrap{padding:22px 0 40px}
}
@media(max-width:430px){
  .brand-text{display:none}
  .brand .logo{height:30px}
}