/* 东升国际 - AI芯片科技官网与App下载站样式表 */
:root{
  --ds-bg:#f4f6fb;
  --ds-panel:#ffffff;
  --ds-head:#eef1f6;
  --ds-navy:#0f1f3d;
  --ds-navy2:#132548;
  --ds-text:#1c2a45;
  --ds-muted:#657089;
  --ds-border:#e3e7f0;
  --ds-chipblue:#2f6fed;
  --ds-teal:#12b3a6;
  --ds-silver:#aab4c8;
  --ds-purple:#7c5cff;
  --ds-orange:#f2932f;
  --ds-red:#d9484f;
  --ds-radius:10px;
  --ds-maxw:1200px;
  --ds-article:820px;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--ds-bg);
  color:var(--ds-text);
  font-family:"Microsoft YaHei","PingFang SC","Segoe UI",sans-serif;
  line-height:1.7;
  overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block;}
a{color:inherit;text-decoration:none;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0 0 .6em 0;line-height:1.35;}
p{margin:0 0 1em 0;}
table{border-collapse:collapse;width:100%;}

.container{max-width:var(--ds-maxw);margin:0 auto;padding:0 20px;}
.scroll-x{overflow-x:auto;}

/* Header */
.site-header{position:sticky;top:0;z-index:100;background:var(--ds-navy);border-bottom:1px solid #1f3560;}
.header-inner{display:flex;align-items:center;justify-content:space-between;padding:10px 20px;max-width:var(--ds-maxw);margin:0 auto;gap:14px;}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:1.1rem;color:#fff;flex:0 0 auto;}
.brand img{width:36px;height:36px;}
.main-nav{display:flex;}
.main-nav ul{display:flex;gap:2px;flex-wrap:wrap;}
.main-nav a{padding:8px 10px;border-radius:6px;font-size:.83rem;color:#b9c3dc;white-space:nowrap;}
.main-nav a:hover,.main-nav a.active{background:#1c3160;color:#fff;}
.header-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.btn{display:inline-block;padding:9px 16px;border-radius:var(--ds-radius);font-size:.88rem;font-weight:600;border:1px solid transparent;cursor:pointer;}
.btn-primary{background:var(--ds-chipblue);color:#fff;}
.btn-primary:hover{background:#1f5bd6;}
.btn-outline{border-color:var(--ds-border);color:var(--ds-text);background:var(--ds-panel);}
.btn-outline:hover{border-color:var(--ds-teal);color:var(--ds-teal);}
.btn-ghost{border-color:#2c4172;color:#b9c3dc;background:transparent;}
.btn-ghost:hover{border-color:var(--ds-teal);color:var(--ds-teal);}
.btn-block{width:100%;text-align:center;}
.nav-toggle{display:none;background:none;border:1px solid #2c4172;border-radius:6px;color:#fff;font-size:1.25rem;padding:5px 10px;cursor:pointer;}
.back-top{position:fixed;right:18px;bottom:18px;z-index:90;width:44px;height:44px;border-radius:50%;background:var(--ds-chipblue);color:#fff;border:none;font-size:1.1rem;cursor:pointer;display:none;align-items:center;justify-content:center;box-shadow:0 4px 12px rgba(47,111,237,.4);}
.back-top.show{display:flex;}

/* Breadcrumb */
.breadcrumb{font-size:.82rem;color:var(--ds-muted);padding:14px 20px 0;max-width:var(--ds-maxw);margin:0 auto;}
.breadcrumb a{color:var(--ds-chipblue);}
.breadcrumb span{margin:0 6px;color:var(--ds-muted);}

/* Hero */
.hero{padding:36px 0 26px;}
.hero-inner{display:flex;align-items:center;gap:36px;max-width:var(--ds-maxw);margin:0 auto;padding:0 20px;}
.hero-copy{flex:1 1 480px;}
.hero-media{flex:1 1 380px;}
.hero-tags{color:var(--ds-chipblue);font-size:.9rem;margin-bottom:12px;font-weight:600;}
.hero h1{font-size:1.85rem;color:var(--ds-navy);}
.hero-desc{color:var(--ds-muted);font-size:1rem;max-width:560px;}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:16px;}

.quick-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;max-width:var(--ds-maxw);margin:22px auto 0;padding:0 20px;}
.quick-item{background:var(--ds-panel);border:1px solid var(--ds-border);border-radius:var(--ds-radius);padding:11px 8px;text-align:center;font-size:.8rem;color:var(--ds-muted);box-shadow:0 1px 3px rgba(15,31,61,.05);}
.quick-item strong{display:block;color:var(--ds-navy);font-size:.9rem;margin-bottom:2px;}

.info-bar{
  background:var(--ds-panel);border:1px solid var(--ds-border);border-radius:var(--ds-radius);
  margin:24px auto 0;max-width:var(--ds-maxw);padding:16px 22px;
  display:flex;flex-wrap:wrap;gap:10px 24px;font-size:.85rem;color:var(--ds-muted);
  box-shadow:0 1px 4px rgba(15,31,61,.06);
}
.info-bar b{color:var(--ds-text);}
.source-note{max-width:var(--ds-maxw);margin:14px auto 0;padding:0 22px;font-size:.83rem;color:var(--ds-muted);}
.demo-note{background:#fdf3e6;border-left:3px solid var(--ds-orange);border-radius:6px;padding:10px 16px;font-size:.85rem;color:var(--ds-text);margin:16px 0;}
.affiliation-note{background:#eef1f6;border-left:3px solid var(--ds-silver);border-radius:6px;padding:10px 16px;font-size:.83rem;color:var(--ds-muted);margin:16px 0;}

/* Sections */
.section{padding:44px 0;border-bottom:1px solid var(--ds-border);}
.section-head{max-width:780px;margin:0 auto 26px;}
.section-head h2{font-size:1.44rem;color:var(--ds-navy);}
.section-desc{color:var(--ds-muted);font-size:.95rem;}
.eyebrow{display:inline-block;font-size:.78rem;color:var(--ds-chipblue);border:1px solid var(--ds-border);padding:3px 10px;border-radius:20px;margin-bottom:8px;background:var(--ds-panel);}

/* Research board table */
.cb-wrap{background:var(--ds-panel);border:1px solid var(--ds-border);border-radius:14px;padding:8px;box-shadow:0 4px 18px rgba(15,31,61,.07);}
.cb-table{font-size:.86rem;}
.cb-table thead th{background:var(--ds-head);color:#4a5578;font-weight:600;padding:13px 14px;text-align:left;white-space:nowrap;border-bottom:1px solid var(--ds-border);}
.cb-table thead th.num,.cb-table td.num{text-align:right;}
.cb-table td{padding:14px;border-bottom:1px solid var(--ds-border);vertical-align:middle;}
.cb-table tr:last-child td{border-bottom:none;}
.cb-table tbody tr:hover td{background:#f7f9fd;}
.cb-theme{display:flex;align-items:center;gap:8px;font-weight:600;color:var(--ds-navy);}
.cb-theme-dot{width:20px;height:20px;border-radius:6px;background:var(--ds-chipblue);color:#fff;font-size:.68rem;font-weight:700;display:flex;align-items:center;justify-content:center;flex:0 0 auto;}
.cb-coverage{display:inline-flex;align-items:center;gap:5px;background:#e3f7f2;color:#0d8f80;border-radius:20px;padding:4px 12px;font-size:.8rem;font-weight:700;}
.cb-coverage::before{content:"◆";font-size:.62rem;color:#0d8f80;}
.cb-priority{font-weight:800;color:var(--ds-orange);font-size:.95rem;}
.cb-priority.p2{color:var(--ds-chipblue);}
.cb-freq{display:inline-flex;align-items:center;gap:5px;padding:4px 10px;border-radius:20px;font-size:.78rem;font-weight:600;}
.cb-freq.fast{background:#fdf0de;color:#b3660c;}
.cb-freq.standard{background:#e3f7f2;color:#0d8f80;}
.cb-switch{position:relative;display:inline-block;width:40px;height:22px;vertical-align:middle;}
.cb-switch input{opacity:0;width:0;height:0;}
.cb-switch-track{position:absolute;inset:0;background:var(--ds-border);border-radius:20px;cursor:pointer;transition:.2s;}
.cb-switch-track::before{content:"";position:absolute;width:18px;height:18px;left:2px;top:2px;background:#fff;border-radius:50%;transition:.2s;box-shadow:0 1px 2px rgba(0,0,0,.25);}
.cb-switch input:checked + .cb-switch-track{background:var(--ds-chipblue);}
.cb-switch input:checked + .cb-switch-track::before{transform:translateX(18px);}
.cb-switch-label{margin-left:8px;font-size:.78rem;color:var(--ds-muted);vertical-align:middle;}

/* Chip tech topic cards */
.tech-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-bottom:30px;}
.tech-chip{background:var(--ds-panel);border:1px solid var(--ds-border);border-radius:var(--ds-radius);padding:14px;text-align:center;font-size:.85rem;color:var(--ds-text);box-shadow:0 1px 3px rgba(15,31,61,.05);}
.tech-chip img{width:48px;height:48px;margin:0 auto 8px;}

.tech-topic{background:var(--ds-panel);border:1px solid var(--ds-border);border-radius:var(--ds-radius);padding:22px 24px;margin-bottom:18px;display:flex;gap:24px;flex-wrap:wrap;}
.tech-topic img{width:220px;height:150px;object-fit:cover;border-radius:8px;flex:0 0 220px;background:var(--ds-bg);}
.tech-topic-body{flex:1 1 320px;}
.tech-topic h3{font-size:1.1rem;color:var(--ds-navy);}
.tech-topic .fig-note{font-size:.8rem;color:var(--ds-muted);margin-top:6px;}
.tech-topic dl{display:grid;grid-template-columns:auto 1fr;gap:4px 12px;font-size:.87rem;margin:10px 0;}
.tech-topic dt{color:var(--ds-muted);}
.tech-topic dd{margin:0;color:var(--ds-text);}
.tech-topic .related-links{margin-top:12px;padding-top:10px;border-top:1px dashed var(--ds-border);display:flex;gap:16px;flex-wrap:wrap;font-size:.85rem;}
.tech-topic .related-links a{color:var(--ds-chipblue);}

/* Split layouts */
.split-row{display:flex;gap:30px;align-items:center;margin-bottom:34px;flex-wrap:wrap;}
.split-row.reverse{flex-direction:row-reverse;}
.split-media{flex:1 1 320px;}
.split-copy{flex:1 1 380px;}
.split-media figure{margin:0;}
.split-media figcaption{font-size:.85rem;color:var(--ds-muted);margin-top:8px;background:var(--ds-panel);border:1px solid var(--ds-border);border-radius:8px;padding:10px 12px;}
.split-copy h3{font-size:1.15rem;color:var(--ds-navy);}
.split-copy .meta-list{margin:10px 0;font-size:.87rem;color:var(--ds-muted);}
.split-copy .meta-list li{padding:4px 0 4px 18px;position:relative;}
.split-copy .meta-list li::before{content:"›";position:absolute;left:0;color:var(--ds-chipblue);}
.warn-line{font-size:.83rem;color:#8a5a17;background:#fdf3e6;border-left:3px solid var(--ds-orange);padding:8px 12px;border-radius:6px;margin-top:10px;}

/* Chip TOC layout (left contents + right body) */
.toc-layout{display:flex;gap:30px;align-items:flex-start;flex-wrap:wrap;}
.toc-side{flex:0 0 220px;background:var(--ds-panel);border:1px solid var(--ds-border);border-radius:var(--ds-radius);padding:16px;position:sticky;top:80px;}
.toc-side h4{font-size:.85rem;color:var(--ds-muted);}
.toc-side li{padding:4px 0;font-size:.85rem;}
.toc-side a:hover{color:var(--ds-chipblue);}
.toc-main{flex:1 1 480px;}

/* Chip knowledge card blocks (used in chip.html) */
.knowledge-block{background:var(--ds-panel);border:1px solid var(--ds-border);border-radius:var(--ds-radius);padding:22px 24px;margin-bottom:18px;}
.knowledge-block h3{font-size:1.08rem;color:var(--ds-navy);}
.knowledge-block .kb-media{display:flex;gap:20px;flex-wrap:wrap;align-items:center;margin-top:10px;}
.knowledge-block .kb-media img{flex:0 0 260px;width:260px;height:170px;object-fit:cover;border-radius:8px;background:var(--ds-bg);}
.knowledge-block .kb-text{flex:1 1 320px;}
.knowledge-block .kb-text p{font-size:.9rem;color:var(--ds-muted);}
.knowledge-block .fig-note{font-size:.8rem;color:var(--ds-muted);margin-top:6px;}

/* Chip spec compare table */
.spec-table{font-size:.85rem;}
.spec-table th,.spec-table td{border:1px solid var(--ds-border);padding:9px 12px;text-align:left;vertical-align:top;}
.spec-table th{background:var(--ds-navy);color:#fff;font-weight:600;}
.spec-table tr:nth-child(even) td{background:#fbfcfe;}

/* Chip nav (pill links) */
.chip-nav{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:22px;}
.chip-nav a{background:var(--ds-panel);border:1px solid var(--ds-border);border-radius:20px;padding:7px 15px;font-size:.85rem;color:var(--ds-text);}
.chip-nav a:hover{border-color:var(--ds-teal);color:var(--ds-teal);}

/* Card grids */
.card-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:18px;}
.info-card{background:var(--ds-panel);border:1px solid var(--ds-border);border-radius:var(--ds-radius);padding:0;overflow:hidden;display:flex;flex-direction:column;box-shadow:0 1px 3px rgba(15,31,61,.05);}
.info-card img{width:100%;height:140px;object-fit:cover;background:var(--ds-bg);}
.info-card .card-body{padding:16px 18px;display:flex;flex-direction:column;gap:6px;flex:1;}
.info-card h3{font-size:1rem;margin:4px 0 2px;color:var(--ds-navy);}
.info-card p.desc{font-size:.87rem;color:var(--ds-muted);flex:1;margin:0;}

/* Data tables */
.data-table{font-size:.85rem;}
.data-table th,.data-table td{border:1px solid var(--ds-border);padding:9px 12px;text-align:left;vertical-align:top;}
.data-table th{background:var(--ds-navy);color:#fff;font-weight:600;}
.data-table tr:nth-child(even) td{background:#fbfcfe;}

/* Steps + timeline */
.step-flow{counter-reset:sf;display:flex;flex-wrap:wrap;gap:14px;}
.step-flow li{counter-increment:sf;flex:1 1 220px;background:var(--ds-panel);border:1px solid var(--ds-border);border-radius:var(--ds-radius);padding:16px 16px 16px 46px;position:relative;font-size:.87rem;color:var(--ds-muted);}
.step-flow li::before{content:counter(sf);position:absolute;left:14px;top:14px;width:22px;height:22px;background:var(--ds-chipblue);color:#fff;font-weight:700;border-radius:50%;font-size:.76rem;display:flex;align-items:center;justify-content:center;}
.step-flow li strong{display:block;color:var(--ds-navy);margin-bottom:4px;font-size:.92rem;}

.timeline{border-left:3px solid var(--ds-border);margin-left:10px;padding-left:24px;display:flex;flex-direction:column;gap:20px;}
.timeline-item{position:relative;}
.timeline-item::before{content:"";position:absolute;left:-31px;top:4px;width:14px;height:14px;border-radius:50%;background:var(--ds-chipblue);border:3px solid var(--ds-panel);box-shadow:0 0 0 2px var(--ds-chipblue);}
.timeline-item h4{font-size:.85rem;color:var(--ds-muted);margin-bottom:4px;}
.timeline-item h3{font-size:1rem;color:var(--ds-navy);}
.timeline-item ul{margin-top:6px;}
.timeline-item li{font-size:.85rem;color:var(--ds-muted);padding:2px 0 2px 16px;position:relative;}
.timeline-item li::before{content:"·";position:absolute;left:2px;color:var(--ds-teal);font-weight:700;}

/* Download cards */
.download-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.dl-card{background:var(--ds-panel);border:1px solid var(--ds-border);border-radius:var(--ds-radius);overflow:hidden;}
.dl-card.dl-android{border-top:4px solid var(--ds-teal);}
.dl-card.dl-ios{border-top:4px solid var(--ds-navy);}
.dl-card.dl-h5{border-top:4px solid var(--ds-chipblue);}
.dl-card-head{padding:18px 20px 0;display:flex;align-items:center;gap:10px;}
.dl-card-head img{width:36px;height:36px;}
.dl-card-body{padding:14px 20px 20px;}
.dl-steps{counter-reset:d;margin:12px 0;}
.dl-steps li{counter-increment:d;padding:6px 0 6px 30px;position:relative;font-size:.86rem;color:var(--ds-muted);border-bottom:1px dashed var(--ds-border);}
.dl-steps li::before{content:counter(d);position:absolute;left:0;top:5px;width:19px;height:19px;background:var(--ds-chipblue);color:#fff;border-radius:50%;font-size:.7rem;display:flex;align-items:center;justify-content:center;}
.notice-box{max-width:var(--ds-article);margin:22px auto 0;background:var(--ds-panel);border:1px solid var(--ds-border);border-radius:var(--ds-radius);padding:18px 22px;font-size:.9rem;color:var(--ds-text);}

/* Troubleshoot */
.trouble-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:14px;}
.trouble-card{background:var(--ds-panel);border:1px solid var(--ds-border);border-left:4px solid var(--ds-orange);border-radius:var(--ds-radius);padding:14px 16px;}
.trouble-card h3{font-size:.92rem;color:var(--ds-navy);}
.trouble-card p{font-size:.83rem;color:var(--ds-muted);margin:6px 0 0;}

/* Magazine articles */
.article-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:18px;}
.article-card{background:var(--ds-panel);border:1px solid var(--ds-border);border-radius:var(--ds-radius);overflow:hidden;display:flex;flex-direction:column;}
.article-card img{width:100%;height:140px;object-fit:cover;}
.article-card .card-body{padding:16px 18px;display:flex;flex-direction:column;gap:6px;}
.article-card h3{font-size:1rem;color:var(--ds-navy);}
.article-meta{font-size:.74rem;color:var(--ds-muted);display:flex;flex-wrap:wrap;gap:8px;}
.article-card p{font-size:.87rem;color:var(--ds-muted);flex:1;margin:0;}

.long-article{max-width:var(--ds-article);margin:0 auto 36px;background:var(--ds-panel);border:1px solid var(--ds-border);border-radius:var(--ds-radius);padding:26px 28px;}
.long-article:last-child{margin-bottom:0;}
.article-top-meta{font-size:.8rem;color:var(--ds-muted);margin-bottom:14px;display:flex;flex-wrap:wrap;gap:12px;}
.long-article h2{font-size:1.28rem;color:var(--ds-navy);}
.long-article h3{font-size:1.02rem;color:var(--ds-chipblue);margin-top:20px;}
.long-article .lede{color:var(--ds-muted);font-size:.96rem;}
.tip-box{background:#fdf3e6;border-left:3px solid var(--ds-orange);border-radius:6px;padding:12px 16px;font-size:.89rem;color:var(--ds-text);margin:16px 0;}
.tip-box strong{color:#a2611f;}
.related-links{margin-top:18px;padding-top:14px;border-top:1px solid var(--ds-border);font-size:.85rem;display:flex;flex-wrap:wrap;gap:14px;}
.related-links a{color:var(--ds-chipblue);}
.content-type-tag{display:inline-block;font-size:.74rem;color:var(--ds-muted);background:var(--ds-bg);border:1px solid var(--ds-border);border-radius:20px;padding:2px 10px;margin-bottom:6px;}
.source-line{font-size:.78rem;color:var(--ds-muted);margin-bottom:12px;}

/* About / history */
.about-grid{display:flex;gap:30px;flex-wrap:wrap;}
.about-copy{flex:1 1 420px;}
.about-info{flex:1 1 300px;background:var(--ds-panel);border:1px solid var(--ds-border);border-radius:var(--ds-radius);padding:18px 20px;font-size:.89rem;}
.about-info dt{color:var(--ds-muted);font-size:.76rem;margin-top:9px;}
.about-info dd{margin:2px 0 0;color:var(--ds-text);}
.principle-list{margin-top:12px;}
.principle-list li{font-size:.87rem;color:var(--ds-muted);padding:5px 0 5px 20px;position:relative;}
.principle-list li::before{content:"›";position:absolute;left:0;color:var(--ds-chipblue);}

/* FAQ */
.faq-list{max-width:var(--ds-article);margin:0 auto;display:flex;flex-direction:column;gap:9px;}
.faq-item{background:var(--ds-panel);border:1px solid var(--ds-border);border-radius:var(--ds-radius);padding:13px 18px;}
.faq-item summary{cursor:pointer;font-weight:600;font-size:.94rem;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:10px;color:var(--ds-navy);}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{content:"+";color:var(--ds-chipblue);font-size:1.15rem;}
.faq-item[open] summary::after{content:"–";}
.faq-item p{margin:9px 0 0;font-size:.87rem;color:var(--ds-muted);}

/* Boundary */
.boundary-box{max-width:var(--ds-article);margin:0 auto;background:var(--ds-panel);border:1px solid var(--ds-border);border-radius:var(--ds-radius);padding:22px 26px;}
.boundary-box ol{margin-top:10px;counter-reset:s;}
.boundary-box li{font-size:.87rem;color:var(--ds-text);padding:6px 0 6px 26px;position:relative;counter-increment:s;}
.boundary-box li::before{content:counter(s);position:absolute;left:0;top:6px;width:18px;height:18px;background:var(--ds-orange);color:#fff;border-radius:50%;font-size:.68rem;display:flex;align-items:center;justify-content:center;}

/* Footer */
.site-footer{background:var(--ds-navy);padding:42px 0 22px;color:#b9c3dc;}
.footer-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:22px;margin-bottom:28px;}
.footer-col h4{font-size:.9rem;color:#fff;}
.footer-col li{font-size:.83rem;padding:4px 0;}
.footer-col a:hover{color:var(--ds-teal);}
.footer-copy{border-top:1px solid #223458;padding-top:16px;font-size:.8rem;text-align:center;line-height:1.9;}

.center{text-align:center;}
.mt-md{margin-top:22px;}
.mt-lg{margin-top:34px;}

@media (max-width:960px){
  .quick-strip{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:repeat(2,1fr);}
  .tech-grid{grid-template-columns:repeat(2,1fr);}
  .download-grid{grid-template-columns:1fr;}
  .toc-side{position:static;}
}
@media (max-width:860px){
  .main-nav{position:absolute;top:100%;left:0;right:0;background:var(--ds-navy);border-bottom:1px solid #1f3560;flex-direction:column;display:none;}
  .main-nav.open{display:flex;}
  .main-nav ul{flex-direction:column;padding:10px 20px;width:100%;}
  .nav-toggle{display:inline-block;}
  .hero-inner{flex-direction:column;}
  .hero h1{font-size:1.45rem;}
  .split-row,.split-row.reverse{flex-direction:column;}
  .tech-topic{flex-direction:column;}
  .tech-topic img{width:100%;flex:none;}
  .knowledge-block .kb-media{flex-direction:column;}
  .knowledge-block .kb-media img{width:100%;}
}
@media (max-width:600px){
  .quick-strip{grid-template-columns:1fr 1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;}
  .tech-grid{grid-template-columns:1fr 1fr;}
  .long-article{padding:20px 16px;}
  .header-actions .btn-primary{display:none;}
}