:root{
  --bg:#f4f8fb;
  --surface:#ffffff;
  --ink:#16242e;
  --ink-soft:#4a5b66;
  --line:#e1eaf1;
  --brand:#0e7c66;      /* 节能绿 */
  --brand-2:#0b6bbf;    /* 科技蓝 */
  --accent:#13b67f;
  --warn:#c9742b;
  --radius:14px;
  --shadow:0 6px 24px rgba(14,60,90,.08);
  --h2-inset:0px;       /* 文章/列表/产品：面包屑与 H2 同左缘 */
  --page-inset:0px;
  --maxw:1200px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  background:var(--bg);color:var(--ink);line-height:1.75;font-size:16px}
a{color:var(--brand-2);text-decoration:none}
a:hover{text-decoration:underline}
.container{max-width:var(--maxw);margin:0 auto;padding:0 20px}
img{max-width:100%}

/* ── 头部 ── */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);
  backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.header-inner{max-width:var(--maxw);margin:0 auto;padding:12px 20px;display:flex;align-items:center;gap:18px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;color:var(--ink);font-size:19px}
.brand-mark{display:inline-grid;place-items:center;width:34px;height:34px;border-radius:9px;
  background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;font-size:18px}
.brand-text em{font-style:normal;color:var(--brand);margin-left:4px;font-weight:600;font-size:14px}
.site-nav{margin-left:auto;display:flex;gap:22px}
.site-nav a{color:var(--ink-soft);font-weight:600;font-size:15px}
.site-nav a:hover{color:var(--brand)}
.nav-toggle{display:none;margin-left:auto;background:none;border:1px solid var(--line);border-radius:8px;
  font-size:20px;padding:4px 12px;cursor:pointer;color:var(--ink)}

/* ── 主体 ── */
.site-main{min-height:60vh;padding:28px 0 60px}

/* ── 面包屑（与 H2 同左缘：左缩进匹配正文卡片内边距）── */
.breadcrumb{margin:0 0 18px;padding-left:0}
.article-layout .breadcrumb, .list-layout .breadcrumb{padding-left:0}
.article-layout .breadcrumb{padding-left:36px}   /* 匹配 .article-body 左内边距 36px */
.page-wrap .breadcrumb{padding-left:48px}        /* 匹配 .page-card 左内边距 48px */
.breadcrumb ol{list-style:none;display:flex;flex-wrap:wrap;gap:6px;margin:0;padding:8px 0;
  font-size:13px;color:var(--ink-soft);border-bottom:1px solid var(--line)}
.breadcrumb li{display:flex;align-items:center;gap:6px}
.breadcrumb li:not(:last-child)::after{content:"›";color:#aab8c2}
.breadcrumb a{color:var(--brand-2)}
.breadcrumb li.active span{color:var(--ink);font-weight:600}

/* ── 文章 / 产品栅格 ── */
.article-grid{display:grid;grid-template-columns:minmax(0,760px) 240px;gap:32px;align-items:start}
.article-body{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:32px 36px;box-shadow:var(--shadow)}
.article-body h1{font-size:28px;line-height:1.35;margin:0 0 18px}
.article-body h2{font-size:21px;margin:34px 0 12px;padding-left:12px;border-left:4px solid var(--brand)}
.article-body h3{font-size:17px;margin:22px 0 10px;color:var(--brand-2)}
.article-body p{margin:10px 0}
.article-body ul,.article-body ol{padding-left:22px;margin:10px 0}
.article-body blockquote{background:#eef6f3;border-left:4px solid var(--brand);margin:16px 0;
  padding:14px 18px;border-radius:0 10px 10px 0;color:var(--ink-soft)}
.article-body blockquote strong{color:var(--brand)}
.article-body table.data{width:100%;border-collapse:collapse;margin:16px 0;font-size:14.5px;
  background:var(--surface);box-shadow:var(--shadow);border-radius:10px;overflow:hidden}
.article-body table.data th,.article-body table.data td{border:1px solid var(--line);padding:10px 12px;text-align:left}
.article-body table.data thead th{background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff}
.article-body table.data tbody tr:nth-child(even){background:#f7fbfa}

/* ── TOC ── */
.toc-aside{position:sticky;top:86px;max-height:calc(100vh - 110px);overflow-y:auto}
.toc-aside nav{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:16px 18px;box-shadow:var(--shadow)}
.toc-aside h3{margin:0 0 10px;font-size:14px;color:var(--ink-soft);letter-spacing:.05em}
.toc-aside ul{list-style:none;margin:0;padding:0}
.toc-aside li a{display:block;padding:5px 0;font-size:13.5px;color:var(--ink-soft);border-left:2px solid transparent;padding-left:10px}
.toc-aside li.lvl-3 a{padding-left:22px;font-size:12.5px}
.toc-aside li a:hover{border-left-color:var(--brand);color:var(--brand);text-decoration:none}

/* ── FAQ ── */
.faq-block{margin-top:30px}
.faq-block h2{font-size:21px;margin:30px 0 12px;padding-left:12px;border-left:4px solid var(--brand)}
.faq-block details{border:1px solid var(--line);border-radius:10px;margin:10px 0;background:var(--surface);overflow:hidden}
.faq-block details summary{cursor:pointer;padding:13px 16px;font-weight:600;list-style:none;background:#f3f8fb}
.faq-block details summary::-webkit-details-marker{display:none}
.faq-block details summary::before{content:"＋";color:var(--brand);margin-right:8px;font-weight:800}
.faq-block details[open] summary::before{content:"－"}
.faq-block details p{margin:0;padding:12px 16px;color:var(--ink-soft)}

/* ── 相关阅读 ── */
.related{margin-top:30px;padding:18px 20px;background:#eef6f3;border-radius:var(--radius)}
.related h2{font-size:19px;margin:0 0 12px}
.related-list{list-style:none;margin:0;padding:0}
.related-list li{padding:8px 0;border-bottom:1px dashed var(--line)}
.related-list li:last-child{border-bottom:none}
.related-list a{font-weight:600}
.related-list span{display:block;font-size:13px;color:var(--ink-soft);margin-top:2px}

/* ── callout ── */
.callout.case{border:1px solid var(--brand);background:#eafaf3;border-radius:10px;padding:14px 18px;margin:18px 0}
.callout.case strong{color:var(--brand)}

/* ── 机构/作者署名块（E-E-A-T） ── */
.author-block{border:1px dashed var(--line);background:var(--surface);border-radius:10px;padding:12px 18px;margin:18px 0;font-size:14px;color:var(--muted)}
.author-block strong{color:var(--brand)}

/* ── 列表页 ── */
.list-grid{display:grid;grid-template-columns:220px minmax(0,1fr);gap:28px;align-items:start}
.cat-side{position:sticky;top:86px}
.cat-toggle{display:none;width:100%;text-align:left;background:var(--surface);border:1px solid var(--line);
  border-radius:10px;padding:10px 14px;font-weight:600;cursor:pointer;margin-bottom:10px}
.category-list{list-style:none;margin:0;padding:0;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
.category-list li a{display:block;padding:12px 16px;border-bottom:1px solid var(--line);color:var(--ink-soft);font-weight:600}
.category-list li:last-child a{border-bottom:none}
.category-list li a:hover{background:#f1f7fb;color:var(--brand);text-decoration:none}
.category-list li.active a{background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff}
.cat-content h1{font-size:26px;margin:0 0 6px}
.list-intro{color:var(--ink-soft);margin:0 0 18px}
.result-list{list-style:none;margin:0;padding:0}
.result-item{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:16px 18px;margin:12px 0;box-shadow:var(--shadow)}
.result-cat{display:inline-block;font-size:12px;background:#eef6f3;color:var(--brand);padding:2px 10px;border-radius:20px;margin-bottom:6px}
.result-title{display:block;font-size:18px;font-weight:700;color:var(--ink)}
.result-title:hover{color:var(--brand)}
.result-sum{margin:6px 0 0;color:var(--ink-soft);font-size:14px}

/* ── 页面卡片 ── */
.page-wrap{padding-left:var(--page-inset)}
.page-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:36px 48px;box-shadow:var(--shadow);max-width:860px;margin:0 auto}
.page-card h1{font-size:28px;margin:0 0 18px}
.page-card h2{font-size:21px;margin:30px 0 12px;padding-left:12px;border-left:4px solid var(--brand)}
.page-card table.data{width:100%;border-collapse:collapse;margin:16px 0;font-size:14.5px}
.page-card table.data th,.page-card table.data td{border:1px solid var(--line);padding:10px 12px;text-align:left}
.page-card table.data thead th{background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff}

/* ── 首页 ── */
.hero{background:radial-gradient(1200px 500px at 80% -10%,rgba(19,182,127,.18),transparent),
  linear-gradient(135deg,#0b2b3a,#0e4a52);color:#eaf6f2;padding:64px 0 72px;overflow:hidden}
.hero-inner{display:grid;grid-template-columns:1.2fr .8fr;gap:30px;align-items:center}
.hero-tag{display:inline-block;background:rgba(19,182,127,.18);color:#7ff0c4;border:1px solid rgba(19,182,127,.4);
  padding:5px 14px;border-radius:20px;font-size:13px;letter-spacing:.05em}
.hero h1{font-size:40px;line-height:1.25;margin:16px 0 14px}
.hero-sub{font-size:17px;color:#c7e2da;max-width:560px}
.hero-actions{display:flex;gap:14px;margin:24px 0}
.btn-primary{display:inline-block;background:linear-gradient(135deg,var(--brand),var(--accent));color:#fff;
  padding:12px 26px;border-radius:30px;font-weight:700;box-shadow:0 8px 20px rgba(14,124,102,.35)}
.btn-primary:hover{text-decoration:none;filter:brightness(1.05)}
.btn-ghost{display:inline-block;border:1px solid rgba(255,255,255,.4);color:#eaf6f2;padding:12px 26px;border-radius:30px;font-weight:600}
.btn-ghost:hover{background:rgba(255,255,255,.08);text-decoration:none}
.hero-stats{list-style:none;display:flex;gap:26px;padding:0;margin:28px 0 0;flex-wrap:wrap}
.hero-stats li{display:flex;flex-direction:column}
.hero-stats strong{font-size:17px;color:#fff}
.hero-stats span{font-size:13px;color:#9fc7bd}
.hero-visual{position:relative;height:320px;display:grid;place-items:center}
.ring{position:absolute;border-radius:50%;border:2px solid rgba(19,182,127,.35)}
.r1{width:300px;height:300px}.r2{width:220px;height:220px;border-color:rgba(11,107,191,.4)}.r3{width:140px;height:140px;border-color:rgba(127,240,196,.5)}
.core{width:90px;height:90px;border-radius:50%;display:grid;place-items:center;font-size:42px;
  background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;box-shadow:0 0 40px rgba(19,182,127,.5);
  animation:spin 14s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

.sec-title{font-size:26px;text-align:center;margin:0 0 6px}
.sec-sub{text-align:center;color:var(--ink-soft);margin:0 0 28px}
.services{padding:56px 0;background:var(--bg)}
.svc-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.svc-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow);transition:.2s}
.svc-card:hover{transform:translateY(-4px);border-color:var(--brand)}
.svc-ic{display:inline-grid;place-items:center;width:44px;height:44px;border-radius:12px;
  background:linear-gradient(135deg,#eafaf3,#e8f1fb);font-size:22px;margin-bottom:10px}
.svc-card h3{margin:6px 0;font-size:18px}
.svc-card p{margin:0;color:var(--ink-soft);font-size:14px}

.flow{padding:56px 0;background:var(--surface)}
.flow-steps{list-style:none;display:grid;grid-template-columns:repeat(4,1fr);gap:18px;padding:0;margin:0;counter-reset:step}
.flow-steps li{background:var(--bg);border:1px solid var(--line);border-radius:var(--radius);padding:22px;position:relative}
.flow-steps span{font-size:30px;font-weight:800;color:var(--brand);opacity:.35}
.flow-steps h3{margin:6px 0;font-size:18px}
.flow-steps p{margin:0;color:var(--ink-soft);font-size:14px}

.latest{padding:56px 0;background:var(--bg)}
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:40px}
.mini-list{list-style:none;padding:0;margin:0}
.mini-list li{padding:12px 0;border-bottom:1px solid var(--line)}
.mini-list a{font-weight:700;font-size:16px}
.mini-list span{display:block;font-size:13px;color:var(--ink-soft);margin-top:2px}
.more-link{display:inline-block;margin-top:14px;font-weight:600}

.cta{padding:60px 0;background:linear-gradient(135deg,#0e4a52,#0b6bbf);color:#fff;text-align:center}
.cta h2{font-size:28px;margin:0 0 10px}
.cta p{max-width:620px;margin:0 auto 22px;color:#d6e9f4}

/* ── 悬浮胶囊（长胶囊：图标+文字） ── */
.float-capsule{position:fixed;left:18px;top:50%;transform:translateY(-50%);z-index:60;display:flex;flex-direction:column;gap:10px}
.cap-btn{height:40px;border-radius:20px;border:none;background:var(--surface);box-shadow:var(--shadow);
  font-size:14px;font-weight:600;cursor:pointer;color:var(--brand);display:inline-flex;align-items:center;gap:6px;
  padding:0 14px;transition:.2s;white-space:nowrap}
.cap-ic{font-size:16px;line-height:1}
.cap-txt{line-height:1}
.cap-btn:hover{background:var(--brand);color:#fff}
.cap-wechat{color:var(--brand-2)}
.cap-wechat:hover{background:var(--brand-2);color:#fff}

/* ── 微信名片弹层 ── */
.wechat-modal{position:fixed;inset:0;background:rgba(0,0,0,.55);z-index:100;display:grid;place-items:center}
.wechat-modal[hidden]{display:none}
.wechat-card{position:relative;width:300px;height:500px;background:#fff;border-radius:14px;overflow:hidden;box-shadow:0 20px 60px rgba(0,0,0,.4)}
.wechat-card img{width:300px;height:500px;object-fit:contain;display:block}
.wechat-close{position:absolute;top:8px;right:8px;width:30px;height:30px;border-radius:50%;border:none;
  background:rgba(0,0,0,.5);color:#fff;font-size:18px;cursor:pointer;line-height:1}

/* ── 页脚 ── */
.site-footer{background:#0b2630;color:#bcd3cd;padding:40px 0 18px}
.footer-inner{max-width:var(--maxw);margin:0 auto;padding:0 20px;display:grid;grid-template-columns:2fr 1fr 1fr;gap:24px}
.footer-col h4{color:#fff;margin:0 0 12px;font-size:16px}
.footer-col a{display:block;color:#9fc1b9;padding:4px 0;font-size:14px}
.footer-col a:hover{color:#fff}
.footer-bottom{max-width:var(--maxw);margin:24px auto 0;padding:16px 20px 0;border-top:1px solid rgba(255,255,255,.1);
  display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;font-size:12px;color:#7e9a93}

/* ── 响应式 ── */
@media (max-width:980px){
  .hero-inner{grid-template-columns:1fr}
  .hero-visual{display:none}
  .hero h1{font-size:30px}
  .svc-grid{grid-template-columns:repeat(2,1fr)}
  .flow-steps{grid-template-columns:repeat(2,1fr)}
  .two-col{grid-template-columns:1fr}
  .article-grid{grid-template-columns:1fr}
  .toc-aside{display:none}
  .list-grid{grid-template-columns:1fr}
  .footer-inner{grid-template-columns:1fr}
}
@media (max-width:680px){
  .site-nav{display:none;position:absolute;top:100%;left:0;right:0;background:#fff;flex-direction:column;
    gap:0;border-bottom:1px solid var(--line);padding:6px 20px}
  .site-nav.open{display:flex}
  .site-nav a{padding:10px 0;border-bottom:1px solid var(--line)}
  .nav-toggle{display:block}
  .svc-grid{grid-template-columns:1fr}
  .flow-steps{grid-template-columns:1fr}
  .article-body{padding:22px 18px}
  .page-card{padding:24px 18px}
  .cat-toggle{display:block}
  .category-list{display:none}
  .category-list.open{display:block}
  .breadcrumb{padding-left:0}
}