/* ==================================================================
   QuickQ quickqvpnapp.com.cn —— 曜金测速 · 暖阳引擎主题
   设计语言:网络测速仪表盘(速度仪表 + KPI 状态卡 + 节点延迟榜 + 全球节点图)
   暖金琥珀主色 + 暖米白底 + 深咖页脚,松石绿做低延迟正向点缀
   ================================================================== */

:root{
  --gold:#f7b32b;      /* 亮金 */
  --amber:#e8890c;     /* 主金 */
  --deep:#b06a0a;      /* 深金 */
  --deepest:#7a4a06;   /* 最深金 */
  --good:#14b8a6;      /* 松石绿 —— 低延迟/加速正向色 */
  --warn:#e8890c;      /* 中延迟提示(暖金) */
  --paper:#fff9ef;     /* 暖米白底 */
  --white:#ffffff;
  --ink:#2a1c0c;       /* 深咖墨 */
  --muted:#8a7358;     /* 暖灰 */
  --line:#f0e1c6;      /* 暖沙边线 */
  --soft:#fbefd7;      /* 暖沙标签底 */
  --grad:linear-gradient(135deg,#f7b32b 0%,#e8890c 48%,#b06a0a 100%);
  --grad-good:linear-gradient(135deg,#2dd4bf 0%,#14b8a6 100%);
  --shadow-sm:0 1px 2px rgba(42,28,12,.05);
  --shadow-md:0 12px 30px rgba(42,28,12,.12);
  --radius:14px;
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  color:var(--ink);background:var(--paper);line-height:1.7;font-size:16px;-webkit-font-smoothing:antialiased}
a{color:var(--deep);text-decoration:none}
a:hover{color:var(--amber)}
img{max-width:100%;display:block}
.wrap{max-width:1160px;margin:0 auto;padding:0 22px}

/* ---------- 顶栏 masthead ---------- */
.masthead{position:sticky;top:0;z-index:50;background:rgba(255,249,239,.88);backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line)}
.masthead .wrap{display:flex;align-items:center;gap:22px;height:66px}
.wordmark{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.wm-mark{width:34px;height:34px;border-radius:9px;box-shadow:var(--shadow-sm)}
.wm-text{display:flex;flex-direction:column;line-height:1.1}
.wm-name{font-size:19px;font-weight:800;letter-spacing:.3px;color:var(--ink)}
.wm-sub{font-size:10px;font-weight:700;letter-spacing:2px;color:var(--deep)}
.nav-wrap{display:flex;align-items:center;gap:6px;margin-left:auto}
.nav-wrap > a,.nav-wrap .dd > button{display:inline-block;padding:8px 13px;font-size:14.5px;font-weight:600;
  color:var(--ink);border-radius:9px;background:none;border:none;cursor:pointer;font-family:inherit}
.nav-wrap > a:hover,.nav-wrap .dd > button:hover{background:var(--soft);color:var(--deep)}
.nav-wrap > a.on{color:var(--deep);background:var(--soft)}
.dd{position:relative}
.dd-menu{position:absolute;top:calc(100% + 8px);left:0;min-width:210px;background:var(--white);
  border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow-md);padding:8px;
  opacity:0;visibility:hidden;transform:translateY(-6px);transition:.18s ease;z-index:60}
.dd:hover .dd-menu{opacity:1;visibility:visible;transform:translateY(0)}
.dd-menu a{display:block;padding:9px 13px;font-size:14px;color:var(--ink);border-radius:8px}
.dd-menu a:hover{background:var(--soft);color:var(--deep)}
.nav-toggle{display:none;font-size:22px;background:none;border:none;cursor:pointer;color:var(--ink)}
.nav-cta{margin-left:6px;flex:0 0 auto}

/* ---------- 按钮 btn ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:700;font-size:15px;
  border-radius:11px;padding:11px 20px;transition:.2s ease;border:1px solid transparent;cursor:pointer;font-family:inherit}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 6px 16px rgba(232,137,12,.32)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 10px 22px rgba(232,137,12,.42);color:#fff}
.btn-outline{border-color:var(--deep);color:var(--deep);background:transparent}
.btn-outline:hover{background:var(--soft)}
.btn-ghost{background:rgba(255,255,255,.14);color:#fff;border-color:rgba(255,255,255,.3)}
.btn-ghost:hover{background:rgba(255,255,255,.26);color:#fff}
.btn-lg{padding:14px 28px;font-size:16px}
.btn-sm{padding:8px 15px;font-size:13.5px}
.btn-block{width:100%}

/* ---------- hero ---------- */
.hero{position:relative;background:
  radial-gradient(1200px 520px at 78% -10%,rgba(247,179,43,.18),transparent 60%),
  radial-gradient(900px 480px at 8% 110%,rgba(20,184,166,.10),transparent 55%),
  linear-gradient(180deg,#fdf4e0 0%,var(--paper) 100%);
  overflow:hidden}
.hero .wrap{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center;padding-top:64px;padding-bottom:64px}
.hero-kicker{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:700;letter-spacing:1px;
  color:var(--deep);background:var(--soft);padding:6px 14px;border-radius:99px;margin-bottom:20px}
.hero-kicker .dot{width:8px;height:8px;border-radius:50%;background:var(--good);box-shadow:0 0 0 4px rgba(20,184,166,.18);
  animation:pulse 1.8s infinite}
@keyframes pulse{0%,100%{box-shadow:0 0 0 0 rgba(20,184,166,.35)}50%{box-shadow:0 0 0 7px rgba(20,184,166,0)}}
.hero-title{font-size:46px;line-height:1.16;font-weight:800;letter-spacing:-.5px;margin-bottom:18px}
.hero-title .hl{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-sub{font-size:17px;color:var(--muted);max-width:520px;margin-bottom:28px}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:18px}
.hero-note{font-size:13px;color:var(--muted)}
.hero-visual{position:relative;display:flex;flex-direction:column;align-items:center;gap:18px}
.gauge{width:100%;max-width:380px;filter:drop-shadow(0 16px 32px rgba(232,137,12,.18))}
.gauge-needle{transition:transform 1.1s cubic-bezier(.3,.9,.3,1)}
.gauge-note{font-size:12.5px;color:var(--muted);text-align:center}

/* ---------- KPI 状态卡 ---------- */
.stat-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin:-6px 0 0}
.stat-card{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:20px 22px;
  box-shadow:var(--shadow-sm);display:flex;align-items:center;gap:14px}
.stat-ic{width:44px;height:44px;border-radius:12px;display:flex;align-items:center;justify-content:center;
  font-size:22px;background:var(--soft);flex:0 0 auto}
.stat-num{font-size:22px;font-weight:800;line-height:1.1;color:var(--ink)}
.stat-lbl{font-size:13px;color:var(--muted)}
.stat-card.good .stat-ic{background:rgba(20,184,166,.14)}
.stat-card.good .stat-num{color:var(--good)}

/* ---------- 通用 section ---------- */
.section{padding:64px 0}
.section.alt{background:#fdf3df}
.sec-head{text-align:center;max-width:620px;margin:0 auto 38px}
.sec-head.left{text-align:left;margin-left:0}
.sec-head .kicker{display:inline-block;font-size:12px;font-weight:800;letter-spacing:2px;color:var(--deep);
  text-transform:uppercase;margin-bottom:10px}
.sec-head h2{font-size:32px;font-weight:800;letter-spacing:-.3px;margin-bottom:12px}
.sec-head p{color:var(--muted);font-size:15.5px}

/* ---------- 快速入口(单列) rel-grid ---------- */
.rel-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.rel-card{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:22px;
  box-shadow:var(--shadow-sm);display:block;transition:transform .2s ease,box-shadow .2s ease}
.rel-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md)}
.rel-card .tag{display:inline-block;font-size:11px;font-weight:800;letter-spacing:1px;color:var(--deep);
  background:var(--soft);padding:3px 10px;border-radius:99px;margin-bottom:12px}
.rel-card h4{font-size:16px;font-weight:700;color:var(--ink);margin-bottom:8px}
.rel-card p{color:var(--muted);font-size:13.5px}
/* 单列变体:快速入口,卡片横排一行一个 */
.rel-grid.single{grid-template-columns:1fr;gap:14px}
.rel-grid.single .rel-card{display:flex;align-items:center;gap:16px;padding:18px 24px}
.rel-grid.single .rel-card:hover{transform:translateX(6px);box-shadow:var(--shadow-sm)}
.rel-grid.single .rel-card .tag{flex:0 0 auto;margin-bottom:0}
.rel-grid.single .rel-card h4{margin:0;font-size:17px;flex:0 0 auto}
.rel-grid.single .rel-card p{margin:0;font-size:14px}
.rel-grid.single .rel-card::after{content:"→";margin-left:auto;color:var(--deep);font-weight:800;font-size:18px}

/* ---------- 节点延迟实时榜 leaderboard ---------- */
.lb-panel{background:var(--white);border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow-sm);
  padding:26px 28px}
.lb-title{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}
.lb-title h3{font-size:18px;font-weight:800}
.lb-title .live{display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:700;color:var(--good)}
.lb-title .live::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--good);animation:pulse 1.6s infinite}
.lb-row{display:grid;grid-template-columns:150px 1fr 74px;align-items:center;gap:16px;padding:13px 0;
  border-bottom:1px dashed var(--line)}
.lb-row:last-child{border-bottom:none}
.lb-name{font-weight:600;font-size:14.5px}
.lb-name small{display:block;font-weight:400;color:var(--muted);font-size:12px}
.lb-track{height:10px;border-radius:99px;background:var(--soft);overflow:hidden}
.lb-fill{height:100%;border-radius:99px;background:var(--grad-good);transition:width 1.2s cubic-bezier(.2,.7,.2,1)}
.lb-fill.mid{background:linear-gradient(90deg,#f7b32b,#e8890c)}
.lb-fill.high{background:linear-gradient(90deg,#e8890c,#b06a0a)}
.lb-val{font-weight:800;font-size:14px;text-align:right;color:var(--ink)}
.lb-val small{display:block;font-weight:600;font-size:11px;color:var(--muted)}
.lb-note{margin-top:14px;font-size:12px;color:var(--muted);text-align:center}

/* ---------- 全球节点地图 ---------- */
.map-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:40px;align-items:center}
.worldmap{width:100%;filter:drop-shadow(0 12px 28px rgba(232,137,12,.14))}
.map-legend{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}
.map-legend span{font-size:12.5px;font-weight:600;color:var(--deep);background:var(--soft);
  padding:4px 12px;border-radius:99px}

/* ---------- bento 功能网格 ---------- */
.bento{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.bento-card{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:26px;
  box-shadow:var(--shadow-sm);position:relative;overflow:hidden}
.bento-card::after{content:"";position:absolute;top:-30px;right:-30px;width:90px;height:90px;border-radius:50%;
  background:radial-gradient(circle,rgba(247,179,43,.18),transparent 70%)}
.bento-card .ic{font-size:30px;line-height:1;margin-bottom:14px}
.bento-card h3{font-size:17px;font-weight:700;margin-bottom:9px}
.bento-card p{font-size:14px;color:var(--muted)}

/* ---------- 使用场景照片网格 scenario ---------- */
.scenario-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.sc-card{position:relative;border-radius:var(--radius);overflow:hidden;aspect-ratio:4/5;display:block}
.sc-card img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.sc-card:hover img{transform:scale(1.06)}
.sc-card .sc-cap{position:absolute;left:0;right:0;bottom:0;padding:34px 16px 14px;
  background:linear-gradient(180deg,transparent,rgba(42,28,12,.82));color:#fff}
.sc-card .sc-cap h4{font-size:15px;font-weight:700;margin-bottom:2px}
.sc-card .sc-cap p{font-size:12px;opacity:.85}

/* ---------- 横向滚动教程 hscroll ---------- */
.hscroll{display:grid;grid-template-columns:repeat(5,1fr);gap:16px}
.h-card{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:22px;
  box-shadow:var(--shadow-sm)}
.h-step{font-size:13px;font-weight:800;color:var(--deep);letter-spacing:1px;margin-bottom:10px}
.h-card h4{font-size:15px;font-weight:700;margin-bottom:8px}
.h-card p{font-size:13px;color:var(--muted)}

/* ---------- 步骤 steps ---------- */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:8px}
.step{position:relative;background:var(--white);border:1px solid var(--line);border-radius:var(--radius);
  padding:26px 24px;box-shadow:var(--shadow-sm)}
.step .n{width:40px;height:40px;border-radius:50%;background:var(--grad);color:#fff;font-weight:800;
  display:flex;align-items:center;justify-content:center;font-size:18px;margin-bottom:16px}
.step .b{display:block}
.step h3{font-size:17px;font-weight:700;margin-bottom:8px}
.step p{color:var(--muted);font-size:14.5px}

/* ---------- 左右图文 split ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:center}
.split.rev{direction:rtl}
.split.rev > *{direction:ltr}
.split .img{position:relative;border-radius:16px;overflow:hidden;box-shadow:var(--shadow-md)}
.split .img img{width:100%;height:100%;object-fit:cover;aspect-ratio:4/3}
.split h2{font-size:30px;font-weight:800;letter-spacing:-.3px;margin-bottom:16px}
.split p{color:var(--muted);font-size:15.5px;margin-bottom:14px}
.split ul{list-style:none;margin:14px 0}
.split ul li{padding:7px 0 7px 26px;position:relative;color:var(--ink);font-size:15px}
.split ul li::before{content:"✓";position:absolute;left:0;color:var(--good);font-weight:800}

/* ---------- 表格 ---------- */
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);background:var(--white);
  box-shadow:var(--shadow-sm)}
table{width:100%;border-collapse:collapse;min-width:560px}
th,td{padding:14px 18px;text-align:left;font-size:14.5px;border-bottom:1px solid var(--line)}
th{background:var(--soft);font-weight:700;color:var(--deepest);font-size:13px;letter-spacing:.5px}
tr:last-child td{border-bottom:none}
td:first-child{font-weight:600}

/* ---------- 提示/警示/引用 ---------- */
.tip,.callout{border-radius:12px;padding:16px 18px 16px 46px;font-size:14.5px;margin:18px 0;position:relative}
.tip{background:var(--soft);border:1px solid #ead9b8}
.tip::before{content:"";position:absolute;left:15px;top:15px;width:18px;height:18px;background-color:var(--deep);-webkit-mask:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'><circle cx='12' cy='12' r='10'/><line x1='12' y1='16' x2='12' y2='12'/><line x1='12' y1='8' x2='12.01' y2='8'/></svg>") no-repeat center/contain;mask:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'><circle cx='12' cy='12' r='10'/><line x1='12' y1='16' x2='12' y2='12'/><line x1='12' y1='8' x2='12.01' y2='8'/></svg>") no-repeat center/contain}
.callout{background:#fdf3df;border:1px solid #f0d8a8}
.callout::before{content:"";position:absolute;left:15px;top:15px;width:18px;height:18px;background-color:var(--deepest);-webkit-mask:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'><path d='M10.29 3.86 1.82 18a2 2 0 0 0 1.71 3h16.94a2 2 0 0 0 1.71-3L13.71 3.86a2 2 0 0 0-3.42 0z'/><line x1='12' y1='9' x2='12' y2='13'/><line x1='12' y1='17' x2='12.01' y2='17'/></svg>") no-repeat center/contain;mask:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'><path d='M10.29 3.86 1.82 18a2 2 0 0 0 1.71 3h16.94a2 2 0 0 0 1.71-3L13.71 3.86a2 2 0 0 0-3.42 0z'/><line x1='12' y1='9' x2='12' y2='13'/><line x1='12' y1='17' x2='12.01' y2='17'/></svg>") no-repeat center/contain}
blockquote{border-left:4px solid var(--deep);background:var(--soft);padding:16px 20px;border-radius:0 12px 12px 0;
  font-size:15.5px;font-style:normal;color:var(--deepest);margin:18px 0}

/* ---------- CTA 横幅 ---------- */
.cta-band{background:linear-gradient(135deg,#2a1c0c 0%,#b06a0a 100%);border-radius:20px;padding:52px 44px;
  text-align:center;color:#fff;position:relative;overflow:hidden}
.cta-band::before{content:"";position:absolute;inset:0;
  background:radial-gradient(600px 300px at 20% 0%,rgba(247,179,43,.35),transparent 60%),
             radial-gradient(500px 300px at 90% 100%,rgba(20,184,166,.22),transparent 55%)}
.cta-band h2{font-size:32px;font-weight:800;margin-bottom:12px;position:relative}
.cta-band p{opacity:.9;margin-bottom:26px;position:relative;font-size:16px}

/* ---------- 面包屑 / 页头 ---------- */
.breadcrumb{font-size:13px;color:var(--muted);margin-bottom:18px}
.breadcrumb a{color:var(--deep)}
.breadcrumb .sep{margin:0 8px;color:#d3bd98}
.page-hero{background:linear-gradient(180deg,#fdf4e0,var(--paper));padding:44px 0 30px;border-bottom:1px solid var(--line)}
.page-hero h1{font-size:38px;font-weight:800;letter-spacing:-.4px;margin-bottom:14px}
.page-hero p{color:var(--muted);font-size:16px;max-width:700px}

/* ---------- 文章 ---------- */
.article-hero{background:linear-gradient(180deg,#fdf4e0,var(--paper));padding:44px 0 0;border-bottom:1px solid var(--line)}
.article-hero .wrap{max-width:960px}
.article-hero h1{font-size:34px;font-weight:800;letter-spacing:-.4px;margin-bottom:14px;line-height:1.25}
.article-hero p{color:var(--muted);font-size:16px;margin-bottom:18px}
.article-meta{display:flex;flex-wrap:wrap;gap:16px;font-size:13px;color:var(--muted);padding-bottom:22px}
.article-meta span{display:inline-flex;align-items:center;gap:6px}
.article-body{max-width:960px;margin:0 auto;padding:36px 22px 64px}
.article-layout{display:grid;grid-template-columns:240px 1fr;gap:44px;align-items:start}
.toc{position:sticky;top:84px;background:var(--white);border:1px solid var(--line);border-radius:12px;
  padding:20px;box-shadow:var(--shadow-sm)}
.toc h4{font-size:13px;font-weight:800;letter-spacing:1px;color:var(--deep);margin-bottom:12px;text-transform:uppercase}
.toc a{display:block;font-size:13.5px;color:var(--ink);padding:7px 0;border-bottom:1px dashed var(--line)}
.toc a:last-child{border-bottom:none}
.toc a:hover{color:var(--deep);padding-left:4px}
.prose h2{font-size:25px;font-weight:800;margin:38px 0 16px;padding-top:10px}
.prose h3{font-size:19px;font-weight:700;margin:28px 0 12px}
.prose p{font-size:16px;color:#4a3a22;margin-bottom:16px}
.prose ul,.prose ol{margin:0 0 16px 22px}
.prose li{margin-bottom:8px}
.prose figure{margin:22px 0}
.prose figure img{border-radius:14px;box-shadow:var(--shadow-md);width:100%}
.prose figcaption{font-size:13px;color:var(--muted);text-align:center;margin-top:10px}

/* ---------- 相关卡片 rel-grid ---------- */
.rel-grid{margin-top:6px}

/* ---------- 分享 ---------- */
.share{display:flex;gap:10px;margin:30px 0;flex-wrap:wrap}
.share a{display:inline-flex;align-items:center;gap:7px;font-size:13px;font-weight:600;padding:8px 14px;
  border-radius:99px;border:1px solid var(--line);color:var(--ink);background:var(--white);transition:.2s}
.share a:hover{border-color:var(--deep);color:var(--deep);transform:translateY(-2px)}

/* ---------- FAQ ---------- */
.faq-group{margin-bottom:38px}
.faq-group > h2{font-size:24px;font-weight:800;margin-bottom:18px}
details{background:var(--white);border:1px solid var(--line);border-radius:12px;margin-bottom:12px;
  box-shadow:var(--shadow-sm);overflow:hidden}
summary{cursor:pointer;font-weight:700;padding:18px 22px;list-style:none;position:relative;font-size:15.5px}
summary::after{content:"+";position:absolute;right:20px;top:14px;font-size:22px;color:var(--deep);transition:.2s}
details[open] summary::after{transform:rotate(45deg)}
.faq-a{padding:0 22px 18px;color:var(--muted);font-size:15px}

/* ---------- 页脚 mastfoot ---------- */
.mastfoot{background:#1f1408;color:#e8d9bd;padding:56px 0 30px;margin-top:0}
.mf-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:36px;margin-bottom:40px}
.mf-brand .wordmark{margin-bottom:16px}
.mf-brand .wm-name{color:#fff}
.mf-brand .wm-sub{color:#f7b32b}
.mf-brand p{font-size:14px;color:#c2ad88;max-width:280px}
.mf-col h4{color:#fff;font-size:14px;font-weight:700;margin-bottom:14px}
.mf-col a{display:block;color:#c2ad88;font-size:13.5px;padding:5px 0}
.mf-col a:hover{color:#f7b32b}
.mastfoot .foot-line{border-top:1px solid rgba(255,255,255,.1);padding-top:22px;text-align:center;
  font-size:13px;color:#9b8660}

/* ---------- 返回顶部 ---------- */
.backtop{position:fixed;right:24px;bottom:24px;width:46px;height:46px;border-radius:12px;background:var(--grad);
  color:#fff;display:flex;align-items:center;justify-content:center;font-size:20px;cursor:pointer;
  border:none;box-shadow:var(--shadow-md);opacity:0;visibility:hidden;transition:.25s;z-index:40}
.backtop.show{opacity:1;visibility:visible}

/* ---------- 居中页 hero(404/search/sitemap) ---------- */
.center-hero{min-height:60vh;display:flex;align-items:center;justify-content:center;text-align:center;padding:60px 22px}
.center-hero h1{font-size:56px;font-weight:800;letter-spacing:-1px;margin-bottom:14px}
.center-hero p{color:var(--muted);font-size:17px;margin-bottom:26px}
.search-box{display:flex;gap:10px;max-width:440px;margin:0 auto}
.search-box input{flex:1;padding:13px 18px;border:1px solid var(--line);border-radius:11px;font-size:15px;
  font-family:inherit;background:var(--white)}
.search-box button{flex:0 0 auto}

/* ---------- 站点地图 sitemap-list ---------- */
.sitemap-list{max-width:860px;margin:0 auto}
.sitemap-list h2{font-size:20px;font-weight:800;margin:30px 0 14px;padding-left:12px;border-left:4px solid var(--deep)}
.sitemap-list a{display:inline-block;padding:5px 0;margin-right:22px;color:var(--ink);font-size:14.5px}
.sitemap-list a:hover{color:var(--deep)}

/* ---------- 响应式 ---------- */
@media(max-width:960px){
  .hero .wrap{grid-template-columns:1fr;padding-top:44px;padding-bottom:48px}
  .hero-title{font-size:36px}
  .map-grid{grid-template-columns:1fr}
  .split{grid-template-columns:1fr;gap:26px}
  .split.rev{direction:ltr}
  .article-layout{grid-template-columns:1fr}
  .toc{position:static;margin-bottom:10px}
  .scenario-grid{grid-template-columns:repeat(2,1fr)}
  .hscroll{grid-template-columns:repeat(2,1fr)}
  .bento{grid-template-columns:repeat(2,1fr)}
  .stat-strip{grid-template-columns:repeat(2,1fr)}
  .mf-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:620px){
  .nav-wrap{display:none}
  .nav-wrap.open{display:flex;position:absolute;top:66px;left:0;right:0;flex-direction:column;
    background:var(--white);border-bottom:1px solid var(--line);padding:12px 22px}
  .nav-toggle{display:block}
  .hero-title{font-size:30px}
  .steps{grid-template-columns:1fr}
  .bento{grid-template-columns:1fr}
  .scenario-grid{grid-template-columns:1fr}
  .hscroll{grid-template-columns:1fr}
  .stat-strip{grid-template-columns:1fr 1fr}
  .rel-grid{grid-template-columns:1fr}
  .rel-grid.single .rel-card{flex-wrap:wrap}
  .mf-grid{grid-template-columns:1fr}
  .lb-row{grid-template-columns:100px 1fr 64px;gap:10px}
}

/* ===== 顶部状态条 topbar ===== */
.topbar{position:relative;z-index:60;background:linear-gradient(90deg,#2a1c0c,#b06a0a 55%,#e8890c);color:#fff;font-size:13px;text-align:center;padding:7px 16px;letter-spacing:.4px;font-weight:500}
.topbar .tb-sep{opacity:.5;margin:0 9px}