/* SMARTSENSOR · CTOSMART 官网样式 */
:root {
  --navy: #0b2e52;
  --navy-2: #0d3c69;
  --blue: #1478c9;
  --blue-d: #0f63a8;
  --ink: #14202c;
  --ink-2: #4d5f70;
  --ink-3: #7d8d9c;
  --line: #e2e9f0;
  --bg: #f5f8fb;
  --bg-2: #eef3f8;
  --white: #fff;
  --radius: 10px;
  --wrap: 1200px;
  --shadow: 0 10px 30px rgba(11, 46, 82, .09);
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font: 15px/1.7 -apple-system, "Segoe UI", "Helvetica Neue", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
}

body.lang-en { font-family: "Segoe UI", "Helvetica Neue", Arial, sans-serif; }

img { max-width: 100%; border: 0; }
a { color: inherit; text-decoration: none; }
a:hover { color: var(--blue); }
ul { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, h4 { margin: 0; font-weight: 700; letter-spacing: -.01em; }

.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 24px; }

.ico { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 1.9; stroke-linecap: round; stroke-linejoin: round; }

/* ---------------- 顶部信息条 ---------------- */
.topbar { background: var(--navy); color: #c8d8e8; font-size: 13px; }
.tb-item { display: inline-flex; align-items: baseline; gap: 6px; padding: 9px 0; margin-right: 26px; }
.tb-item strong { color: #fff; font-weight: 600; letter-spacing: .02em; }
.tb-right { float: right; }
.tb-right .lang {
  display: inline-block;
  padding: 3px 12px;
  margin-top: 6px;
  color: #fff;
  border: 1px solid rgba(255, 255, 255, .34);
  border-radius: 999px;
  font-size: 12px;
  letter-spacing: .06em;
}
.tb-right .lang:hover { background: rgba(255, 255, 255, .14); color: #fff; }

/* ---------------- 页头 ---------------- */
.hdr {
  position: sticky;
  top: 0;
  z-index: 30;
  background: rgba(255, 255, 255, .96);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--line);
}

.hdr-in { display: flex; align-items: center; gap: 28px; height: 76px; }

.brand { display: flex; align-items: center; gap: 12px; flex: none; }
.brand-mark {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: linear-gradient(150deg, var(--navy), var(--blue));
  border-radius: 9px;
  color: #fff;
  font: 700 15px/1 "Segoe UI", sans-serif;
  letter-spacing: .04em;
}
.brand-mark img { width: 100%; height: 100%; object-fit: contain; border-radius: 9px; background: #fff; }
.brand-text strong { display: block; font-size: 15.5px; line-height: 1.25; letter-spacing: .02em; }
.brand-text small { display: block; font-size: 10.5px; letter-spacing: .2em; color: var(--ink-3); text-transform: uppercase; }

.nav { display: flex; align-items: center; gap: 4px; margin-left: auto; }
.nav a {
  padding: 9px 14px;
  font-size: 14px;
  font-weight: 600;
  color: var(--ink-2);
  border-radius: 7px;
  white-space: nowrap;
}
.nav a:hover { color: var(--navy); background: var(--bg-2); }
.nav a.on { color: var(--navy); background: var(--bg-2); }

.hdr-cta {
  flex: none;
  padding: 10px 20px;
  font-size: 13.5px;
  font-weight: 700;
  color: #fff;
  background: var(--navy);
  border-radius: 7px;
}
.hdr-cta:hover { background: var(--blue); color: #fff; }

/* ---------------- 按钮 ---------------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  font-size: 14px;
  font-weight: 700;
  border-radius: 7px;
  border: 1px solid transparent;
  transition: background .18s, color .18s, border-color .18s, transform .18s;
}
.btn .ico { width: 15px; height: 15px; }
.btn-primary { background: var(--blue); color: #fff; }
.btn-primary:hover { background: var(--blue-d); color: #fff; transform: translateY(-1px); }
.btn-ghost { background: #fff; color: var(--navy); border-color: #c9d7e4; }
.btn-ghost:hover { background: var(--navy); color: #fff; border-color: var(--navy); }
.btn-lg { padding: 15px 28px; font-size: 15px; }
.btn-block { width: 100%; justify-content: center; margin-top: 10px; }

/* ---------------- 首屏 ---------------- */
.hero { position: relative; overflow: hidden; background: var(--navy); }
.hero-media { position: absolute; inset: 0; }
.hero-media img { width: 100%; height: 100%; object-fit: cover; }
.hero-shade {
  position: absolute;
  inset: 0;
  background: linear-gradient(100deg, rgba(6, 26, 46, .94) 0%, rgba(8, 34, 60, .82) 42%, rgba(9, 40, 70, .45) 72%, rgba(9, 40, 70, .3) 100%);
}
.hero-in { position: relative; padding: 92px 24px 84px; color: #fff; max-width: 760px; margin-left: calc((100% - var(--wrap)) / 2 + 24px); }
.hero .kicker {
  display: inline-block;
  margin: 0 0 18px;
  padding: 5px 12px;
  font-size: 11.5px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: #cfe4f7;
  border: 1px solid rgba(207, 228, 247, .4);
  border-radius: 4px;
}
.hero h1 { font-size: 44px; line-height: 1.18; letter-spacing: -.02em; }
.hero-sub { margin: 20px 0 0; max-width: 620px; font-size: 16.5px; line-height: 1.8; color: #d6e4f0; }
body.lang-en .hero h1 { font-size: 42px; }
.hero-cta { display: flex; gap: 14px; margin-top: 32px; flex-wrap: wrap; }
.hero-badges { display: flex; gap: 22px; margin-top: 40px; flex-wrap: wrap; }
.badge { font-size: 12.5px; color: #a9c3da; letter-spacing: .04em; }
.badge::before { content: ""; display: inline-block; width: 5px; height: 5px; margin-right: 8px; vertical-align: 2px; background: #4aa3e0; border-radius: 50%; }

/* ---------------- 区块 ---------------- */
.sec { padding: 86px 0; }
.sec-alt { background: var(--bg); }
.sec-pagehead { padding: 68px 0 42px; }

.sec-head { margin-bottom: 46px; max-width: 720px; }
.sec-head.center { margin: 0 auto 46px; text-align: center; }
.sec-head h2 { font-size: 31px; line-height: 1.28; color: var(--navy); }
.sec-head h1 { font-size: 34px; line-height: 1.26; color: var(--navy); }
.sec-head p { margin: 14px 0 0; font-size: 15.5px; line-height: 1.8; color: var(--ink-2); }
.sec-head::after {
  content: "";
  display: block;
  width: 42px;
  height: 3px;
  margin-top: 20px;
  background: var(--blue);
  border-radius: 2px;
}
.sec-head.center::after { margin-left: auto; margin-right: auto; }

.sec-more { margin-top: 42px; text-align: center; }

/* ---------------- 产品卡 ---------------- */
.pgrid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }

.pcard {
  display: flex;
  flex-direction: column;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: box-shadow .2s, transform .2s, border-color .2s;
}
.pcard:hover { transform: translateY(-3px); box-shadow: var(--shadow); border-color: #c6d9ea; }
.pcard-img { padding: 18px; background: #f7fafd; border-bottom: 1px solid var(--line); }
.pcard-img img { width: 100%; height: 158px; object-fit: contain; mix-blend-mode: multiply; }
.pcard-body { padding: 15px 16px 18px; }
.pcard-cat { font-size: 11.5px; letter-spacing: .06em; color: var(--blue); text-transform: uppercase; }
.pcard-body h3 { margin: 6px 0 8px; font-size: 15px; line-height: 1.45; font-weight: 600; color: var(--navy); }
.pcard-model { font: 600 12px/1 "Consolas", monospace; color: var(--ink-3); }

/* ---------------- 分类卡 ---------------- */
.cgrid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.ccard {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  padding: 22px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: border-color .2s, box-shadow .2s;
}
.ccard:hover { border-color: #bdd4e8; box-shadow: var(--shadow); }
.ccard-img {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 96px;
  margin-bottom: 14px;
  color: var(--blue);
  background: var(--bg);
  border-radius: 8px;
}
.ccard-img .ico { width: 34px; height: 34px; stroke-width: 1.6; }
.ccard-img img { max-height: 96px; object-fit: contain; mix-blend-mode: multiply; }
.ccard h3 { font-size: 15px; font-weight: 600; color: var(--navy); line-height: 1.4; }
.ccard-meta { margin-top: 4px; font-size: 12px; color: var(--ink-3); }

/* ---------------- 特性 ---------------- */
.fgrid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.fcard { padding: 26px 22px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); }
.fcard h3 { margin: 14px 0 8px; font-size: 15.5px; color: var(--navy); }
.fcard p { margin: 0; font-size: 14px; line-height: 1.75; color: var(--ink-2); }
.ficon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  color: var(--blue);
  background: #e8f2fb;
  border-radius: 9px;
}
.ficon .ico { width: 21px; height: 21px; }

/* ---------------- 数据 ---------------- */
.stats { padding: 52px 0; background: var(--navy); color: #fff; }
.stats-in { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.stat strong { display: block; font: 700 34px/1.1 "Segoe UI", sans-serif; color: #fff; letter-spacing: -.02em; }
.stat span { display: block; margin-top: 8px; font-size: 13px; color: #a9c3da; }

/* ---------------- 富文本 ---------------- */
.narrow { max-width: 860px; }
.rich { font-size: 15.5px; line-height: 1.95; color: #26333f; }
.rich h3 { margin: 26px 0 10px; font-size: 18px; color: var(--navy); }
.rich p { margin: 0 0 16px; }
.rich ul, .rich ol { margin: 0 0 16px; padding-left: 22px; }
.rich li { margin-bottom: 6px; }
.rich a { color: var(--blue); border-bottom: 1px solid #bcd9f0; }
.rich img { display: block; margin: 20px auto; border-radius: 8px; }
.rich table { width: 100%; margin: 18px 0; border-collapse: collapse; }
.rich table td, .rich table th { padding: 9px 12px; border: 1px solid var(--line); font-size: 14px; }

/* ---------------- 图文 ---------------- */
.it-split { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.it-split.reverse .it-media { order: 2; }
.it-media img { width: 100%; border-radius: 12px; box-shadow: var(--shadow); }
.it-text h2 { font-size: 29px; line-height: 1.3; color: var(--navy); margin-bottom: 18px; }
.it-text .rich { font-size: 15px; }
.it-text .btn { margin-top: 10px; }

/* ---------------- 图集 ---------------- */
.gal { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.gal-item { display: block; background: var(--bg); border: 1px solid var(--line); border-radius: 8px; overflow: hidden; }
.gal-item img { width: 100%; height: 190px; object-fit: contain; padding: 10px; }
.gal-cap { margin: 18px 0 0; font-size: 13px; color: var(--ink-3); text-align: center; }

.cert-strip { display: grid; grid-template-columns: repeat(6, 1fr); gap: 14px; align-items: center; }
.cert-strip img { width: 100%; height: 130px; object-fit: contain; padding: 10px; background: #fff; border: 1px solid var(--line); border-radius: 8px; }

/* ---------------- CTA ---------------- */
.cta-band { padding: 60px 0; background: linear-gradient(100deg, var(--navy), #10538f); color: #fff; }
.cta-in { display: flex; align-items: center; justify-content: space-between; gap: 40px; flex-wrap: wrap; }
.cta-in h2 { font-size: 26px; line-height: 1.35; }
.cta-in p { margin: 10px 0 0; font-size: 14.5px; color: #c3d7e8; max-width: 620px; }
.cta-in .btn { background: #fff; color: var(--navy); border-color: #fff; }
.cta-in .btn:hover { background: #e8f2fb; }

/* ---------------- 联系 ---------------- */
.contact-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.contact-card { padding: 26px 22px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); }
.contact-card .cc-ico { display: flex; align-items: center; justify-content: center; width: 40px; height: 40px; color: var(--blue); background: #e8f2fb; border-radius: 9px; }
.contact-card h3 { margin: 14px 0 6px; font-size: 13px; font-weight: 600; color: var(--ink-3); letter-spacing: .05em; text-transform: uppercase; }
.contact-card .cc-main { margin: 0; font-size: 16px; font-weight: 600; color: var(--navy); line-height: 1.5; word-break: break-word; }
.contact-card .cc-sub { margin: 6px 0 0; font-size: 12.5px; color: var(--ink-3); }

/* ---------------- 文件 / 渠道 ---------------- */
.filelist { margin: 0; padding: 0; list-style: none; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.filelist li { display: flex; align-items: center; gap: 14px; padding: 16px 20px; border-bottom: 1px solid var(--line); }
.filelist li:last-child { border-bottom: 0; }
.doc-ico { color: var(--blue); }
.doc-ico .ico { width: 20px; height: 20px; }
.filelist a { flex: 1; font-size: 14.5px; font-weight: 600; }
.doc-size { font-size: 12.5px; color: var(--ink-3); }
.doc-dl { flex: none; font-size: 12.5px; color: var(--blue); }

.buy-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.buy-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 22px;
  font-size: 15px;
  font-weight: 600;
  color: var(--navy);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
.buy-card:hover { border-color: var(--blue); color: var(--blue); }
.buy-note { margin: 22px 0 0; font-size: 13.5px; color: var(--ink-3); text-align: center; }

/* ---------------- 列表页 ---------------- */
.page-hero { padding: 58px 0 46px; background: var(--bg); border-bottom: 1px solid var(--line); }
.crumb { display: flex; align-items: center; gap: 8px; font-size: 12.5px; color: var(--ink-3); margin-bottom: 14px; }
.crumb i { font-style: normal; color: #b8c6d3; }
.crumb a:hover { color: var(--blue); }
.page-hero h1 { font-size: 32px; color: var(--navy); }
.page-hero p { margin: 12px 0 0; font-size: 14.5px; color: var(--ink-2); max-width: 820px; }

.ctype-bar { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 30px; }
.ctype {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--ink-2);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 999px;
}
.ctype span { font-size: 11.5px; color: var(--ink-3); }
.ctype:hover { border-color: var(--blue); color: var(--blue); }
.ctype.on { background: var(--navy); border-color: var(--navy); color: #fff; }
.ctype.on span { color: #a9c3da; }

.pager { display: flex; gap: 8px; justify-content: center; margin-top: 44px; }
.page { min-width: 38px; padding: 8px 12px; text-align: center; font-size: 13.5px; color: var(--ink-2); background: #fff; border: 1px solid var(--line); border-radius: 7px; }
.page:hover { border-color: var(--blue); color: var(--blue); }
.page.on { background: var(--navy); border-color: var(--navy); color: #fff; }

.other-cats { margin-top: 54px; padding-top: 32px; border-top: 1px solid var(--line); }
.other-cats h3 { font-size: 15px; color: var(--ink-2); margin-bottom: 16px; }
.ctabs { display: flex; gap: 8px; flex-wrap: wrap; }
.ctab { padding: 7px 13px; font-size: 13px; color: var(--ink-2); border: 1px solid var(--line); border-radius: 999px; }
.ctab:hover { border-color: var(--blue); color: var(--blue); }

/* ---------------- 产品详情 ---------------- */
.product-top { padding-top: 34px; }
.product-main { display: grid; grid-template-columns: 1.05fr .95fr; gap: 54px; padding-bottom: 56px; }
.p-gallery { position: sticky; top: 100px; align-self: start; }
.p-stage { display: flex; align-items: center; justify-content: center; min-height: 380px; padding: 24px; background: var(--bg); border: 1px solid var(--line); border-radius: 12px; }
.p-stage img { max-height: 420px; object-fit: contain; mix-blend-mode: multiply; }
.noimg { color: var(--ink-3); font-size: 13px; }
.p-thumbs { display: flex; gap: 10px; margin-top: 12px; flex-wrap: wrap; }
.thumb { padding: 0; width: 68px; height: 68px; background: #fff; border: 1px solid var(--line); border-radius: 7px; overflow: hidden; cursor: pointer; }
.thumb img { width: 100%; height: 100%; object-fit: contain; mix-blend-mode: multiply; }
.thumb.on { border-color: var(--blue); box-shadow: 0 0 0 2px rgba(20, 120, 201, .18); }

.p-info { padding-top: 6px; }
.p-cat { margin: 0 0 10px; font-size: 12px; letter-spacing: .1em; text-transform: uppercase; color: var(--blue); }
.p-info h1 { font-size: 30px; line-height: 1.3; color: var(--navy); }
.p-model { margin: 14px 0 0; font-size: 13.5px; color: var(--ink-2); }
.p-model strong { font-family: Consolas, monospace; color: var(--navy); }
.p-summary { margin: 18px 0 0; font-size: 15px; line-height: 1.85; color: #2c3a47; }

.p-buy { margin-top: 30px; padding: 22px; background: var(--bg); border: 1px solid var(--line); border-radius: 12px; }
.pb-label { margin: 0; font-size: 12px; letter-spacing: .08em; text-transform: uppercase; color: var(--ink-3); }
.pb-price { margin: 6px 0 16px; font-size: 19px; font-weight: 700; color: var(--navy); }
.pb-points { margin: 18px 0 0; padding: 16px 0 0; border-top: 1px dashed #cfdbe7; display: grid; gap: 8px; }
.pb-points li { font-size: 13px; color: var(--ink-2); }
.pb-points li::before { content: "✓"; margin-right: 8px; color: #1a8f5c; font-weight: 700; }

.product-body { display: grid; grid-template-columns: 1.05fr .95fr; gap: 54px; padding-bottom: 20px; }
.p-sec { margin-bottom: 46px; }
.p-sec h2 { font-size: 19px; color: var(--navy); margin-bottom: 16px; padding-bottom: 10px; border-bottom: 2px solid var(--bg-2); }
.spec-table { width: 100%; border-collapse: collapse; background: #fff; border: 1px solid var(--line); border-radius: 8px; overflow: hidden; }
.spec-table tr:nth-child(odd) { background: #fafcfe; }
.spec-table td { padding: 11px 16px; font-size: 13.5px; border-bottom: 1px solid var(--line); vertical-align: top; }
.spec-table td.k { width: 38%; color: var(--ink-2); font-weight: 600; }
.spec-table td.v { color: var(--ink); }
.note { font-size: 13.5px; color: var(--ink-3); }

/* ---------------- 搜索 ---------------- */
.search-form { display: flex; gap: 10px; margin-top: 22px; max-width: 560px; }
.search-form input[type="search"] { flex: 1; padding: 12px 16px; font: inherit; font-size: 14px; border: 1px solid #c9d7e4; border-radius: 7px; outline: none; }
.search-form input[type="search"]:focus { border-color: var(--blue); }
.search-meta { margin: 0; font-size: 13.5px; color: var(--ink-2); }
.empty { padding: 60px 0; text-align: center; color: var(--ink-3); }

/* ---------------- 页脚 ---------------- */
.ftr { margin-top: 20px; padding-top: 62px; background: var(--navy); color: #b9cbdc; }
.f-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.2fr; gap: 40px; padding-bottom: 48px; }
.f-col h4 { margin-bottom: 16px; font-size: 13px; letter-spacing: .1em; text-transform: uppercase; color: #fff; }
.f-col p { margin: 0; font-size: 13.5px; line-height: 1.85; }
.f-col ul { display: grid; gap: 9px; }
.f-col a { font-size: 13.5px; color: #b9cbdc; }
.f-col a:hover { color: #fff; }
.f-label { display: block; font-size: 11px; letter-spacing: .08em; text-transform: uppercase; color: #7e9bb5; margin-bottom: 2px; }
.f-contact li { margin-bottom: 12px; }
.f-contact strong { display: block; font-size: 15px; color: #fff; }
.f-bottom { padding: 18px 0; border-top: 1px solid rgba(255, 255, 255, .1); }
.f-b-in { display: flex; align-items: center; justify-content: space-between; gap: 20px; flex-wrap: wrap; font-size: 12.5px; color: #8fa9c1; }
.f-b-in a { color: #8fa9c1; }
.icp-ph { color: #5f7d97; }

/* ---------------- 灯箱 ---------------- */
.lb { position: fixed; inset: 0; z-index: 90; display: flex; align-items: center; justify-content: center; background: rgba(6, 20, 34, .88); padding: 40px; cursor: zoom-out; }
.lb img { max-width: 92vw; max-height: 88vh; background: #fff; border-radius: 6px; }

/* ---------------- 响应式 ---------------- */
@media (max-width: 1080px) {
  .pgrid, .cgrid, .fgrid, .stats-in, .contact-grid, .buy-grid { grid-template-columns: repeat(3, 1fr); }
  .gal { grid-template-columns: repeat(3, 1fr); }
  .cert-strip { grid-template-columns: repeat(4, 1fr); }
  .nav a { padding: 8px 10px; font-size: 13px; }
  .hero-in { max-width: none; margin: 0; padding: 72px 24px 64px; }
}

@media (max-width: 860px) {
  .tb-item:nth-child(n+2) { display: none; }
  .nav { display: none; }
  .product-main, .product-body, .it-split { grid-template-columns: 1fr; gap: 30px; }
  .p-gallery { position: static; }
  .p-stage { min-height: 260px; }
  .pgrid, .cgrid, .fgrid, .stats-in, .contact-grid, .buy-grid, .gal { grid-template-columns: repeat(2, 1fr); }
  .cert-strip { grid-template-columns: repeat(3, 1fr); }
  .f-grid { grid-template-columns: 1fr 1fr; gap: 30px; }
  .hero h1, body.lang-en .hero h1 { font-size: 32px; }
  .sec { padding: 60px 0; }
  .sec-pagehead { padding: 44px 0 26px; }
  .sec-head h2 { font-size: 24px; }
  .sec-head h1 { font-size: 26px; }
  .cta-in h2 { font-size: 21px; }
}

@media (max-width: 560px) {
  .pgrid, .cgrid, .fgrid, .stats-in, .contact-grid, .buy-grid, .gal, .cert-strip, .f-grid { grid-template-columns: 1fr 1fr; }
  .pcard-img img { height: 128px; }
  .hero h1, body.lang-en .hero h1 { font-size: 27px; }
  .page-hero h1 { font-size: 24px; }
  .product-main { padding-bottom: 30px; }
}

/* ---------------- 证书分类树 ---------------- */
.cert-tree { display: grid; gap: 14px; }
.ct-group { background: #fff; border: 1px solid #e3e9f0; border-radius: 12px; overflow: hidden; }
.ct-group > summary { cursor: pointer; display: flex; align-items: center; gap: 12px; padding: 15px 20px;
  font-weight: 700; color: #0b2e52; list-style: none; user-select: none; }
.ct-group > summary::-webkit-details-marker { display: none; }
.ct-group > summary:hover { background: #f7fafd; }
.ct-gname { flex: 1; font-size: 15.5px; }
.ct-gcount { font-size: 12.5px; color: #1478c9; background: #eef6fd; padding: 3px 10px; border-radius: 20px; }
.ct-arrow { width: 8px; height: 8px; border-right: 2px solid #8aa4bd; border-bottom: 2px solid #8aa4bd;
  transform: rotate(45deg); transition: transform .18s ease; margin-right: 4px; }
details[open] .ct-arrow { transform: rotate(-135deg); }
.ct-body { padding: 2px 20px 16px; }
.ct-line h4 { margin: 16px 0 10px; font-size: 13.5px; color: #4a6a86; font-weight: 600; display: flex; gap: 8px; align-items: baseline; }
.ct-line h4 span { color: #9fb2c6; font-weight: 400; font-size: 12px; }
.ct-list { list-style: none; display: grid; gap: 8px; }
.ct-row a { display: grid; grid-template-columns: 46px minmax(0, 1fr) auto auto 64px; align-items: center; gap: 10px;
  padding: 10px 12px; border-radius: 8px; background: #f7fafd; border: 1px solid transparent;
  text-decoration: none; transition: all .15s ease; }
.ct-row a:hover { background: #fff; border-color: #cfe4f6; box-shadow: 0 2px 10px rgba(11, 46, 82, .07); }
.ct-doc { font-size: 10.5px; letter-spacing: .04em; text-align: center; color: #fff; background: #1478c9;
  border-radius: 4px; padding: 3px 0; }
.ct-name { font-size: 14px; color: #0b2e52; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.ct-more { position: relative; font-size: 11.5px; color: #1478c9; background: #eef6fd; padding: 2px 9px;
  border-radius: 20px; cursor: help; white-space: nowrap; }
.ct-more:hover::after { content: attr(data-tip); position: absolute; bottom: 140%; left: 50%; transform: translateX(-50%);
  z-index: 30; background: #0b2e52; color: #fff; font-size: 12px; line-height: 1.7; padding: 9px 12px; border-radius: 8px;
  max-width: 340px; width: max-content; white-space: normal; box-shadow: 0 10px 26px rgba(6, 20, 34, .32); }
.ct-meta { font-size: 11.5px; color: #8aa4bd; white-space: nowrap; }
.ct-dl { font-size: 12px; color: #1478c9; text-align: right; white-space: nowrap; }
.ct-row a:hover .ct-dl { font-weight: 700; }
.ct-hint { text-align: center; color: #8aa4bd; font-size: 13px; margin: 0 0 20px; }

@media (max-width: 860px) {
  .ct-row a { grid-template-columns: 38px minmax(0, 1fr) auto; }
  .ct-meta, .ct-dl { display: none; }
  .ct-body { padding: 2px 12px 12px; }
}

/* 证书页 / 简介页：区块留白收紧 */
.page-cert .sec { padding: 44px 0; }
.page-cert .sec-pagehead { padding: 52px 0 8px; }
.page-cert .sec + .sec { padding-top: 12px; }
.page-cert .sec + .sec + .sec { padding-top: 44px; }
.page-about .sec + .sec { padding-top: 20px; }
.page-cert .gal-item img { max-height: 260px; object-fit: contain; background: #fff; }