/* 91门户 全站样式 —— 门户信息流版式：细线分隔、方角模块、报纸式排版 */
:root{
  --ink:#0d1b2a;
  --ink-soft:#1f3a54;
  --brand:#e04e18;
  --brand-deep:#b83b0c;
  --blue:#0b68c4;
  --text:#202b36;
  --muted:#66788a;
  --paper:#fbfaf7;
  --card:#ffffff;
  --line:#dde3e8;
  --line-strong:#c3cdd6;
  --tag:#f2f4f6;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  color:var(--text);background:var(--paper);line-height:1.75;font-size:16px;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--blue);text-decoration:none}
a:hover{text-decoration:underline}
ul,ol{padding-left:1.15em}
li{margin:4px 0}
.wrap{max-width:1200px;margin:0 auto;padding:0 24px}

/* 顶部工具条 */
.utility{background:var(--ink);color:#c9d6e2;font-size:13px}
.utility .wrap{display:flex;justify-content:space-between;align-items:center;height:38px;gap:16px}
.utility a{color:#c9d6e2}
.utility .u-links{display:flex;gap:18px;flex-wrap:wrap}
.utility .u-now{letter-spacing:.02em}

/* 品牌头部 */
.masthead{background:#fff;border-bottom:1px solid var(--line)}
.masthead .wrap{display:flex;align-items:center;justify-content:space-between;gap:24px;padding-top:20px;padding-bottom:18px}
.logo{display:flex;align-items:center;gap:12px}
.logo .mark{
  width:46px;height:46px;background:var(--ink);color:#fff;display:grid;place-items:center;
  font-weight:800;font-size:19px;letter-spacing:-.5px;border-bottom:4px solid var(--brand);
}
.logo .wordmark{display:flex;flex-direction:column;line-height:1.25}
.logo .wordmark b{font-size:23px;color:var(--ink);letter-spacing:.02em}
.logo .wordmark span{font-size:11.5px;color:var(--muted);letter-spacing:.16em;text-transform:uppercase}
.masthead-actions{display:flex;align-items:center;gap:12px;font-size:14px}
.btn{
  display:inline-block;padding:8px 18px;border:1px solid var(--ink);color:var(--ink);
  font-size:14px;font-weight:600;transition:.18s;background:transparent;
}
.btn:hover{text-decoration:none;background:var(--ink);color:#fff}
.btn.primary{background:var(--brand);border-color:var(--brand);color:#fff}
.btn.primary:hover{background:var(--brand-deep);border-color:var(--brand-deep)}

/* 频道导航 */
.channels{background:#fff;border-bottom:1px solid var(--line)}
.channels ul{display:flex;list-style:none;padding:0;gap:0;overflow-x:auto}
.channels li{flex:none}
.channels a{
  display:block;padding:13px 17px;color:var(--ink-soft);font-size:15px;font-weight:500;
  border-bottom:3px solid transparent;white-space:nowrap;
}
.channels a:hover{text-decoration:none;color:var(--brand);background:#fafbfc}
.channels a.active{color:var(--ink);font-weight:700;border-bottom-color:var(--brand)}

/* 封面区（无外部图片依赖） */
.cover{
  background:var(--ink);color:#fff;padding:54px 0 46px;position:relative;overflow:hidden;
}
.cover::after{
  content:"";position:absolute;inset:auto -10% -40% auto;width:620px;height:620px;
  background:radial-gradient(circle at center,rgba(224,78,24,.42),transparent 62%);pointer-events:none;
}
.cover .kicker{
  display:inline-block;font-size:12px;letter-spacing:.22em;text-transform:uppercase;
  color:#ffb99b;border:1px solid rgba(255,185,155,.45);padding:4px 10px;margin-bottom:18px;
}
.cover h1{font-size:42px;line-height:1.22;letter-spacing:-.5px;font-weight:800;max-width:820px}
.cover p{margin-top:16px;max-width:760px;color:#cbd8e4;font-size:17px}
.cover .meta-row{margin-top:26px;display:flex;flex-wrap:wrap;gap:12px}
.cover .meta-row span{
  font-size:13px;color:#dfe9f1;border-left:2px solid var(--brand);padding-left:10px;
}
.cover .cover-actions{margin-top:30px;display:flex;gap:12px;flex-wrap:wrap}
.cover .cover-actions .btn{border-color:rgba(255,255,255,.65);color:#fff}
.cover .cover-actions .btn:hover{background:#fff;color:var(--ink)}
.cover .cover-actions .btn.primary{border-color:var(--brand);color:#fff}

/* 数据条 */
.stats{background:#fff;border-bottom:1px solid var(--line)}
.stats .wrap{display:grid;grid-template-columns:repeat(4,1fr);gap:0}
.stats .stat{padding:22px 20px 20px;border-left:1px solid var(--line)}
.stats .stat:first-child{border-left:0;padding-left:0}
.stats b{display:block;font-size:30px;color:var(--ink);line-height:1.1;font-weight:800;letter-spacing:-.5px}
.stats span{font-size:13px;color:var(--muted)}

/* 主体 */
main{padding:44px 0 20px}
.breadcrumb{font-size:13px;color:var(--muted);padding-bottom:18px;display:flex;gap:8px;flex-wrap:wrap}
.breadcrumb a{color:var(--muted)}
.breadcrumb .sep{color:var(--line-strong)}

/* 目录 */
.toc{
  background:#fff;border:1px solid var(--line);border-left:4px solid var(--ink);
  padding:18px 22px;margin:0 0 34px;
}
.toc h2{font-size:13px;letter-spacing:.16em;text-transform:uppercase;color:var(--ink);margin-bottom:10px}
.toc ol{columns:2;column-gap:32px;font-size:14px;list-style:decimal}
.toc li{margin:6px 0}

/* 章节 */
section{padding:0 0 46px}
section > h2{
  font-size:26px;color:var(--ink);font-weight:800;letter-spacing:-.3px;
  padding-bottom:12px;border-bottom:1px solid var(--line-strong);margin-bottom:8px;
  display:flex;align-items:baseline;gap:12px;flex-wrap:wrap;
}
section > h2 .num{
  font-size:12px;color:var(--brand);letter-spacing:.14em;font-weight:700;
  border:1px solid var(--brand);padding:2px 7px;position:relative;top:-3px;
}
section .lead{color:var(--muted);margin:12px 0 26px;font-size:15.5px;max-width:860px}
h3{font-size:18px;color:var(--ink);margin-bottom:8px;font-weight:700}
h4{font-size:15px;color:var(--ink-soft);margin-bottom:6px}
p{margin-bottom:12px}
p:last-child{margin-bottom:0}

/* 产品矩阵 */
.matrix{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
.matrix .cell{background:#fff;padding:26px 24px 24px;transition:.2s;display:flex;flex-direction:column}
.matrix .cell:hover{background:#fffdfb;box-shadow:inset 0 -3px 0 var(--brand)}
.matrix .cell .idx{font-size:12px;letter-spacing:.16em;color:var(--brand);font-weight:700}
.matrix .cell h3{margin:8px 0 6px;font-size:19px}
.matrix .cell h3 a{color:var(--ink)}
.matrix .cell h3 a:hover{text-decoration:none;color:var(--brand)}
.matrix .cell p{font-size:14px;color:var(--muted);flex:1}
.matrix .cell .more{font-size:13px;font-weight:600;color:var(--brand);margin-top:14px}

/* 双栏 */
.layout{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:44px}
.sidebar{display:flex;flex-direction:column;gap:26px}
.aside-box{border:1px solid var(--line);background:#fff;padding:22px}
.aside-box h3{
  font-size:14px;letter-spacing:.12em;text-transform:uppercase;color:var(--ink);
  padding-bottom:10px;border-bottom:2px solid var(--brand);margin-bottom:14px;
}
.aside-box ul{list-style:none;padding:0}
.aside-box li{padding:9px 0;border-bottom:1px dashed var(--line);font-size:14px}
.aside-box li:last-child{border-bottom:0}
.aside-box li a{color:var(--ink-soft)}
.aside-box p{font-size:14px;color:var(--muted)}
.aside-box .dot{display:inline-block;width:6px;height:6px;background:var(--brand);margin-right:8px;vertical-align:2px}

/* 快讯 */
.ticker{border-top:1px solid var(--line-strong);border-bottom:1px solid var(--line);background:#fff}
.ticker .wrap{display:grid;grid-template-columns:110px 1fr;align-items:stretch}
.ticker .label{
  background:var(--brand);color:#fff;font-size:14px;font-weight:700;letter-spacing:.1em;
  display:grid;place-items:center;padding:14px 0;
}
.ticker ul{list-style:none;padding:0;display:grid;grid-template-columns:repeat(3,1fr)}
.ticker li{
  font-size:13.5px;color:var(--muted);padding:14px 18px;border-left:1px solid var(--line);margin:0;
  overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
}
.ticker li time{color:var(--brand);font-weight:600;margin-right:8px}

/* 卡片列表 */
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.card{background:#fff;border:1px solid var(--line);padding:22px}
.card h3{font-size:17px}
.card p{font-size:14px;color:var(--muted);margin:6px 0 0}
.card .cap{
  font-size:11.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--brand);
  font-weight:700;margin-bottom:6px;
}

/* 功能条目 */
.feature-list{list-style:none;padding:0;display:grid;grid-template-columns:repeat(2,1fr);gap:0 34px}
.feature-list li{
  padding:14px 0 14px 30px;border-bottom:1px solid var(--line);position:relative;margin:0;font-size:14.5px;
}
.feature-list li::before{
  content:"";position:absolute;left:0;top:23px;width:9px;height:9px;background:var(--brand);
}
.feature-list li b{display:block;color:var(--ink);font-size:15px;margin-bottom:2px}
.feature-list li span{color:var(--muted)}

/* 表格 */
.table-wrap{overflow-x:auto;border:1px solid var(--line-strong)}
table{width:100%;border-collapse:collapse;background:#fff;font-size:14.5px;min-width:520px}
caption{caption-side:top;text-align:left;font-size:13px;color:var(--muted);padding:10px 14px;background:#f4f6f8}
thead th{
  background:var(--ink);color:#fff;text-align:left;font-weight:600;font-size:13.5px;
  letter-spacing:.04em;padding:12px 14px;border-right:1px solid rgba(255,255,255,.12);
}
tbody td,tbody th{
  padding:12px 14px;border-bottom:1px solid var(--line);border-right:1px solid var(--line);vertical-align:top;
}
tbody th{text-align:left;color:var(--ink);font-weight:600;background:#fafbfc;width:26%}
tbody tr:last-child td,tbody tr:last-child th{border-bottom:0}
tbody tr:hover td,tbody tr:hover th{background:#fff9f5}

/* 步骤 */
.steps{list-style:none;padding:0;counter-reset:step}
.steps li{
  counter-increment:step;padding:16px 0 16px 54px;position:relative;
  border-bottom:1px solid var(--line);margin:0;
}
.steps li::before{
  content:counter(step,decimal-leading-zero);position:absolute;left:0;top:16px;
  font-size:13px;font-weight:800;color:var(--brand);border:1px solid var(--brand);
  padding:2px 7px;letter-spacing:.06em;
}
.steps li b{display:block;color:var(--ink);margin-bottom:2px}
.steps li p{font-size:14px;color:var(--muted);margin:0}

/* 引用块 */
.note{
  border-left:3px solid var(--blue);background:#f4f8fd;padding:16px 20px;font-size:14.5px;color:#334a60;
}
.note strong{color:var(--ink)}

/* FAQ */
details{border-bottom:1px solid var(--line);padding:14px 0}
details summary{
  cursor:pointer;font-weight:700;color:var(--ink);font-size:15.5px;list-style:none;
  display:flex;justify-content:space-between;gap:16px;
}
details summary::-webkit-details-marker{display:none}
details summary::after{content:"+";color:var(--brand);font-size:18px;font-weight:700}
details[open] summary::after{content:"−"}
details p{margin:10px 0 0;color:var(--muted);font-size:14.5px}

/* 图集 */
.gallery{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.gallery figure{margin:0;border:1px solid var(--line);background:#fff}
.gallery .art{
  aspect-ratio:16/9;display:grid;place-items:center;position:relative;overflow:hidden;
  background:linear-gradient(135deg,#0d1b2a,#1f3a54 62%,#2b4c6a);
}
.gallery .art::before{
  content:"";position:absolute;inset:0;
  background:
    repeating-linear-gradient(90deg,rgba(255,255,255,.07) 0 1px,transparent 1px 44px),
    repeating-linear-gradient(0deg,rgba(255,255,255,.05) 0 1px,transparent 1px 44px);
}
.gallery .art.accent{background:linear-gradient(135deg,#e04e18,#8a2c07 68%,#3d1304)}
.gallery .art span{
  position:relative;color:#fff;font-size:14px;letter-spacing:.2em;padding:6px 14px;
  border:1px solid rgba(255,255,255,.45);
}
.gallery figcaption{font-size:13px;color:var(--muted);padding:10px 12px;border-top:1px solid var(--line)}

/* 时间线 */
.timeline{list-style:none;padding:0;border-left:2px solid var(--line-strong);margin-left:6px}
.timeline li{padding:0 0 22px 24px;position:relative;margin:0}
.timeline li::before{
  content:"";position:absolute;left:-7px;top:7px;width:12px;height:12px;
  background:#fff;border:2px solid var(--brand);
}
.timeline .year{font-size:13px;font-weight:800;color:var(--brand);letter-spacing:.08em}
.timeline b{display:block;color:var(--ink);font-size:16px;margin:2px 0 2px}
.timeline p{font-size:14px;color:var(--muted);margin:0}

/* CTA */
.cta{
  background:var(--ink);color:#fff;padding:34px 36px;display:flex;justify-content:space-between;
  align-items:center;gap:26px;flex-wrap:wrap;margin-top:10px;
}
.cta h2{font-size:23px;letter-spacing:-.2px;border:0;padding:0;margin:0;color:#fff}
.cta p{color:#c5d3df;font-size:14.5px;margin-top:6px}
.cta .btn{border-color:#fff;color:#fff}
.cta .btn:hover{background:#fff;color:var(--ink)}

/* 页脚 */
footer{background:var(--ink);color:#a9bacb;margin-top:54px;padding:48px 0 26px;font-size:14px}
footer .cols{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:32px}
footer h4{color:#fff;font-size:14px;letter-spacing:.1em;text-transform:uppercase;margin-bottom:14px}
footer p{color:#8fa2b5;font-size:13.5px}
footer ul{list-style:none;padding:0}
footer li{margin:7px 0}
footer a{color:#a9bacb}
footer a:hover{color:#fff}
footer .social{display:flex;gap:10px;flex-wrap:wrap;margin-top:14px}
footer .social a{
  border:1px solid rgba(255,255,255,.22);padding:5px 11px;font-size:12.5px;
}
footer .social a:hover{background:rgba(255,255,255,.1);text-decoration:none}
footer .legal{
  border-top:1px solid rgba(255,255,255,.12);margin-top:34px;padding-top:18px;
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:12.5px;color:#7d8fa1;
}
footer .legal nav{display:flex;gap:16px;flex-wrap:wrap}

/* 响应式 */
@media(max-width:980px){
  .layout{grid-template-columns:1fr;gap:34px}
  .matrix{grid-template-columns:repeat(2,1fr)}
  .stats .wrap{grid-template-columns:repeat(2,1fr)}
  .stats .stat:nth-child(3){border-left:0;padding-left:20px}
  .ticker ul{grid-template-columns:1fr}
  .ticker li:nth-child(n+2){display:none}
  .gallery{grid-template-columns:1fr 1fr}
  footer .cols{grid-template-columns:1fr 1fr}
  .cover h1{font-size:32px}
}
@media(max-width:640px){
  .wrap{padding:0 18px}
  .masthead .wrap{flex-wrap:wrap;gap:14px;padding-top:16px;padding-bottom:14px}
  .masthead-actions{font-size:13px}
  .cover{padding:38px 0 34px}
  .cover h1{font-size:26px}
  .cover p{font-size:15px}
  .matrix{grid-template-columns:1fr}
  .grid-2,.grid-3,.gallery,.feature-list{grid-template-columns:1fr}
  .toc ol{columns:1}
  section > h2{font-size:22px}
  .stats b{font-size:24px}
  .cta{padding:26px 22px}
  .cta h2{font-size:19px}
  .timeline li{padding-left:18px}
  .ticker .wrap{grid-template-columns:1fr}
  .ticker .label{padding:8px 0;font-size:13px}
  .ticker li{border-left:0;border-top:1px solid var(--line)}
  footer .cols{grid-template-columns:1fr}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *{transition:none!important}
}