/* ==========================================================================
   知道链 · 只读浏览器 / 验证页 / 存证明细 / 存证凭证 —— 统一样式
   纯静态，无外部字体/CDN；深色标题 + 浅色卡片。
   ========================================================================== */

:root {
  --navy-900: #0b1f33;
  --navy-800: #102a44;
  --navy-700: #17395c;
  --ink-900: #17212b;
  --ink-700: #334155;
  --ink-500: #64748b;
  --ink-400: #94a3b8;
  --line: #dbe3ec;
  --line-soft: #eef2f7;
  --bg: #f2f5f9;
  --card: #ffffff;
  --accent: #1f5fa8;
  --accent-dark: #164a85;
  --accent-soft: #eaf2fb;
  --ok: #0f7a4d;
  --ok-bg: #e9f7ef;
  --warn: #8a5c00;
  --warn-bg: #fdf6e3;
  --err: #b42318;
  --err-bg: #fdecea;
  --radius: 10px;
  --radius-sm: 8px;
  --shadow: 0 1px 2px rgba(16, 32, 48, 0.05), 0 10px 28px rgba(16, 32, 48, 0.06);
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.6;
  color: var(--ink-900);
  background: var(--bg);
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

h1, h2, h3 { line-height: 1.3; }

.sr-only {
  position: absolute !important;
  width: 1px; height: 1px;
  margin: -1px; padding: 0; border: 0;
  clip: rect(0 0 0 0); clip-path: inset(50%);
  overflow: hidden; white-space: nowrap;
}

.mono { font-family: var(--mono); font-size: 0.92em; }
.hash { font-family: var(--mono); font-size: 0.9em; word-break: break-all; }
.muted { color: var(--ink-500); }
.mt-8 { margin-top: 8px; }
.mt-10 { margin-top: 10px; }
.mt-16 { margin-top: 16px; }
.nowrap { white-space: nowrap; }

/* ---------- 顶栏 ---------- */

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  background: linear-gradient(100deg, var(--navy-900), var(--navy-700));
  color: #fff;
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.06), 0 2px 12px rgba(11, 31, 51, 0.24);
}

.topbar-inner {
  max-width: 1180px;
  margin: 0 auto;
  padding: 12px 20px;
  display: flex;
  align-items: center;
  gap: 22px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: #fff;
  text-decoration: none;
  flex: 0 0 auto;
}
.brand:hover { text-decoration: none; }

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px; height: 34px;
}
.brand-mark img {
  width: 32px; height: auto;
  display: block;
  filter: drop-shadow(0 1px 2px rgba(0,0,0,.25));
}

.brand-name {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0.04em;
}
.brand-en {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.62);
}

.nav { display: flex; gap: 4px; flex: 1 1 auto; }
.nav a {
  color: rgba(255, 255, 255, 0.76);
  padding: 6px 12px;
  border-radius: 7px;
  font-size: 14px;
  text-decoration: none;
}
.nav a:hover { color: #fff; background: rgba(255, 255, 255, 0.08); text-decoration: none; }
.nav a.is-active { color: #fff; background: rgba(255, 255, 255, 0.14); }

.mode-badge {
  flex: 0 0 auto;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.78);
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 999px;
  padding: 3px 11px;
  white-space: nowrap;
}
.mode-badge:empty { display: none; }

/* ---------- 页面骨架 ---------- */

.wrap {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 20px 48px;
}

.hero { padding: 30px 0 18px; }
.hero h1 {
  margin: 0 0 6px;
  font-size: 30px;
  letter-spacing: 0.01em;
  color: var(--navy-900);
}
.hero-sub { margin: 0; color: var(--ink-500); font-size: 15px; }

.crumb { font-size: 13px; color: var(--ink-500); margin-bottom: 10px; }
.crumb a { color: var(--ink-500); }
.crumb a:hover { color: var(--accent); }

.site-foot {
  border-top: 1px solid var(--line);
  padding: 22px 20px 34px;
  text-align: center;
  color: var(--ink-400);
  font-size: 12px;
}

/* ---------- 搜索 / 表单 ---------- */

.search-form { display: flex; gap: 10px; max-width: 620px; margin-top: 18px; }
.search-input { flex: 1 1 auto; }

.field { margin-bottom: 14px; }
.field > label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--ink-700);
  margin-bottom: 6px;
}
.field .hint { margin: 6px 0 0; font-size: 12px; color: var(--ink-500); }

.input {
  width: 100%;
  padding: 10px 12px;
  font: inherit;
  font-size: 14px;
  color: var(--ink-900);
  background: #fff;
  border: 1px solid #c6d2e0;
  border-radius: var(--radius-sm);
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.input::placeholder { color: var(--ink-400); }
.input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(31, 95, 168, 0.14); }

.input-row { display: flex; gap: 10px; }
.input-row .input { flex: 1 1 auto; }

.form-error {
  margin: 8px 0 0;
  color: var(--err);
  background: var(--err-bg);
  border: 1px solid #f5c6c2;
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  font-size: 13px;
}
.form-actions { display: flex; gap: 10px; margin-top: 16px; flex-wrap: wrap; }

/* ---------- 按钮 ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 9px 18px;
  font: inherit;
  font-size: 14px;
  font-weight: 600;
  line-height: 1.3;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}
.btn:hover { text-decoration: none; }
.btn:focus-visible { outline: 3px solid rgba(31, 95, 168, 0.28); outline-offset: 1px; }

.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-dark); }
.btn-primary:disabled { background: #9db4cf; cursor: not-allowed; }

.btn-secondary { background: var(--navy-800); color: #fff; }
.btn-secondary:hover { background: var(--navy-900); }

.btn-ghost {
  background: #fff;
  color: var(--ink-700);
  border-color: #c6d2e0;
}
.btn-ghost:hover { background: #f5f8fb; border-color: #a9bccf; color: var(--ink-900); }

.btn-sm { padding: 5px 12px; font-size: 13px; }

/* ---------- 卡片 / 面板 ---------- */

.panel {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  margin-bottom: 18px;
  overflow: hidden;
}

.panel-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 18px;
  border-bottom: 1px solid var(--line-soft);
}
.panel-head h2 {
  margin: 0;
  font-size: 16px;
  color: var(--navy-900);
  letter-spacing: 0.02em;
}
.panel-note { font-size: 12px; color: var(--ink-500); }
.panel-body { padding: 16px 18px; }
.panel-body:last-child { padding-bottom: 18px; }

/* ---------- 统计卡 ---------- */

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 14px;
  margin-bottom: 16px;
}

.stat-card {
  position: relative;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 16px 18px 14px;
  overflow: hidden;
}
.stat-card::before {
  content: "";
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 3px;
  background: var(--accent);
}
.stat-label { font-size: 13px; color: var(--ink-500); }
.stat-value {
  margin: 4px 0 2px;
  font-size: 27px;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--navy-900);
  font-variant-numeric: tabular-nums;
}
.stat-sub { font-size: 12px; color: var(--ink-400); min-height: 1.2em; }

.integrity {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 18px;
  padding: 9px 14px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  border: 1px solid transparent;
}
.integrity.is-ok { background: var(--ok-bg); border-color: #bfe3cd; color: var(--ok); }
.integrity.is-err { background: var(--err-bg); border-color: #f5c6c2; color: var(--err); }

/* ---------- 表格 ---------- */

.table-wrap { width: 100%; overflow-x: auto; }

table.data {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}
table.data th {
  text-align: left;
  padding: 10px 18px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--ink-500);
  background: #f7f9fc;
  border-bottom: 1px solid var(--line);
  white-space: nowrap;
}
table.data td {
  padding: 11px 18px;
  border-bottom: 1px solid var(--line-soft);
  vertical-align: middle;
}
table.data tbody tr:last-child td { border-bottom: 0; }
table.data tbody tr:hover { background: #f8fafc; }
table.data td .sub { display: block; font-size: 12px; color: var(--ink-400); }
table.data .amount { font-variant-numeric: tabular-nums; white-space: nowrap; }

.table-empty,
.loading {
  padding: 26px 18px !important;
  text-align: center;
  color: var(--ink-500);
  font-size: 13px;
}

/* ---------- 徽章 ---------- */

.badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 2px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  line-height: 1.6;
  white-space: nowrap;
}
.badge-ok { background: var(--ok-bg); color: var(--ok); }
.badge-err { background: var(--err-bg); color: var(--err); }
.badge-warn { background: var(--warn-bg); color: var(--warn); }
.badge-neutral { background: #eef2f7; color: var(--ink-500); }
.badge-accent { background: var(--accent-soft); color: var(--accent-dark); }

.badge::before {
  content: "";
  width: 6px; height: 6px;
  border-radius: 50%;
  background: currentColor;
  opacity: 0.75;
}

/* ---------- 两栏布局 ---------- */

.two-col {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  align-items: start;
}
.two-col > .panel { margin-bottom: 0; }

/* ---------- 空状态 / 引导 ---------- */

.empty-guide { border-left: 3px solid var(--accent); }
.empty-guide .panel-body { padding: 22px; }
.empty-guide h2 { margin: 0 0 6px; font-size: 17px; color: var(--navy-900); }
.empty-guide p { margin: 0 0 12px; color: var(--ink-700); }
.empty-guide ol { margin: 0; padding-left: 20px; color: var(--ink-700); }
.empty-guide li { margin-bottom: 8px; }
.empty-guide code {
  font-family: var(--mono);
  font-size: 12.5px;
  background: #edf2f7;
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 1px 6px;
}

.empty {
  padding: 30px 18px;
  text-align: center;
  color: var(--ink-500);
  font-size: 13px;
}
.empty strong { display: block; margin-bottom: 4px; color: var(--ink-700); font-size: 14px; }

/* ---------- 拖拽上传 ---------- */

.dropzone {
  position: relative;
  border: 2px dashed #b9c7d8;
  border-radius: var(--radius);
  background: #fbfcfe;
  padding: 30px 18px;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}
.dropzone:hover { border-color: #8fa9c4; background: #f7fafd; }
.dropzone.is-over { border-color: var(--accent); background: var(--accent-soft); }
.dropzone:focus-visible { outline: 3px solid rgba(31, 95, 168, 0.28); outline-offset: 2px; }
.dropzone-title { margin: 0 0 4px; font-size: 15px; font-weight: 600; color: var(--ink-700); }
.dropzone-sub { margin: 0; font-size: 12px; color: var(--ink-400); }
.file-info {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 14px 0 0;
  padding: 6px 12px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-dark);
  font-size: 13px;
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ---------- 验证结果 ---------- */

.verify-result:empty { display: none; }
.result {
  border-radius: var(--radius);
  border: 1px solid transparent;
  padding: 18px 20px;
  margin-bottom: 18px;
  background: var(--card);
  box-shadow: var(--shadow);
}
.result-ok { background: var(--ok-bg); border-color: #bfe3cd; }
.result-err { background: var(--err-bg); border-color: #f5c6c2; }
.result-info { background: var(--accent-soft); border-color: #c9dcf1; }
.result-warn { background: var(--warn-bg); border-color: #ecd9a4; }

.result-head {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 8px;
}
.result-head h2 { margin: 0; font-size: 18px; color: var(--ink-900); }
.result p { margin: 0 0 10px; color: var(--ink-700); }
.result .result-sub { font-size: 13px; color: var(--ink-500); }
.result .result-actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 14px; }

/* ---------- 键值表 ---------- */

.kv {
  display: grid;
  grid-template-columns: minmax(120px, 172px) minmax(0, 1fr);
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  overflow: hidden;
}
.kv dt {
  padding: 9px 14px;
  font-size: 13px;
  color: var(--ink-500);
  background: #f8fafc;
  border-bottom: 1px solid var(--line-soft);
}
.kv dd {
  margin: 0;
  padding: 9px 14px;
  font-size: 14px;
  border-bottom: 1px solid var(--line-soft);
  word-break: break-word;
}
.kv dt:last-of-type, .kv dd:last-of-type { border-bottom: 0; }
.kv dd .copy-btn { margin-left: 8px; }

.copy-btn {
  display: inline-flex;
  align-items: center;
  padding: 2px 9px;
  font: inherit;
  font-size: 11.5px;
  font-weight: 600;
  color: var(--ink-500);
  background: #fff;
  border: 1px solid #cbd5e1;
  border-radius: 999px;
  cursor: pointer;
}
.copy-btn:hover { color: var(--accent); border-color: var(--accent); }
.copy-btn.is-copied { color: var(--ok); border-color: #bfe3cd; background: var(--ok-bg); }

/* ---------- 详情页 ---------- */

.evidence-head { margin-top: 22px; }
.evidence-title-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
  flex-wrap: wrap;
}
.evidence-head h1 {
  margin: 0 0 4px;
  font-size: 24px;
  color: var(--navy-900);
}
.evidence-id { margin: 0; color: var(--ink-500); font-size: 14px; }
.evidence-badges { display: flex; gap: 8px; flex-wrap: wrap; padding-top: 4px; }
.evidence-head .actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 16px;
}

.detail-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  align-items: start;
}
.detail-grid > .panel { margin-bottom: 0; }

/* ---------- 时间线 ---------- */

.timeline { list-style: none; margin: 0; padding: 2px 0 0; position: relative; }
.timeline::before {
  content: "";
  position: absolute;
  left: 8px; top: 8px; bottom: 8px;
  width: 2px;
  background: var(--line);
}
.timeline li { position: relative; padding: 0 0 18px 32px; }
.timeline li:last-child { padding-bottom: 0; }
.timeline .dot {
  position: absolute;
  left: 1px; top: 5px;
  width: 16px; height: 16px;
  border-radius: 50%;
  background: #fff;
  border: 3px solid var(--accent);
}
.timeline-head {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 2px;
}
.timeline-time { font-size: 12.5px; color: var(--ink-500); font-variant-numeric: tabular-nums; }
.timeline-body { font-size: 13px; color: var(--ink-700); }
.timeline-body .mono { color: var(--ink-500); }

/* ---------- 可折叠 JSON ---------- */

details.json-details {
  margin-top: 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: #fbfcfe;
}
details.json-details > summary {
  padding: 9px 14px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 600;
  color: var(--ink-700);
  user-select: none;
}
details.json-details > summary:hover { color: var(--accent); }
details.json-details[open] > summary { border-bottom: 1px solid var(--line-soft); }
pre.json {
  margin: 0;
  padding: 14px 16px;
  background: var(--navy-900);
  color: #dbe7f3;
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.55;
  overflow: auto;
  max-height: 420px;
  border-radius: 0 0 var(--radius-sm) var(--radius-sm);
}
pre.json::selection { background: rgba(255, 255, 255, 0.22); }

.proof-head {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}
.proof-head h3 { margin: 0; font-size: 15px; color: var(--navy-900); }
.path-list { margin: 10px 0 0; padding: 0; list-style: none; }
.path-list li {
  display: flex;
  gap: 10px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ink-700);
  padding: 4px 0;
  border-bottom: 1px dashed var(--line-soft);
  word-break: break-all;
}
.path-list li:last-child { border-bottom: 0; }
.path-list .pos {
  flex: 0 0 auto;
  font-family: var(--sans);
  color: var(--ink-500);
  font-size: 12px;
}

/* ---------- 页面级错误 ---------- */

.page-error {
  margin: 22px 0;
  padding: 20px 22px;
  border-radius: var(--radius);
  background: var(--err-bg);
  border: 1px solid #f5c6c2;
  color: var(--err);
  box-shadow: var(--shadow);
}
.page-error h2 { margin: 0 0 6px; font-size: 17px; color: var(--err); }
.page-error p { margin: 0 0 6px; color: #7a2b23; }
.page-error .actions { margin-top: 14px; }

/* ---------- 存证凭证（A4） ---------- */

.cert-page {
  max-width: 210mm;
  margin: 0 auto;
  padding: 22px 16px 60px;
}

.cert-toolbar {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: flex-end;
  margin-bottom: 16px;
}
.vc-check { font-size: 13px; color: var(--ink-500); }
.vc-check.is-ok { color: var(--ok); font-weight: 600; }
.vc-check.is-err { color: var(--err); font-weight: 600; }

.cert {
  position: relative;
  background: #fff;
  border: 1px solid #d8e0ea;
  border-radius: 6px;
  box-shadow: 0 14px 44px rgba(15, 31, 51, 0.14);
  padding: 16mm 18mm 14mm;
  min-height: 262mm;
  overflow: hidden;
}
.cert::after {
  content: "";
  position: absolute;
  inset: 5mm;
  border: 1px solid rgba(23, 57, 92, 0.16);
  border-radius: 2px;
  pointer-events: none;
}
.cert-inner { position: relative; z-index: 1; }

.cert-head {
  text-align: center;
  border-bottom: 2px solid var(--navy-800);
  padding-bottom: 14px;
  margin-bottom: 18px;
}
.cert-brand {
  font-size: 11px;
  letter-spacing: 0.3em;
  color: var(--ink-500);
  text-transform: uppercase;
}
.cert-head h1 {
  margin: 10px 0 4px;
  font-size: 30px;
  letter-spacing: 0.24em;
  color: var(--navy-900);
  text-indent: 0.24em;
}
.cert-sub {
  font-size: 10.5px;
  letter-spacing: 0.32em;
  color: var(--ink-400);
  text-transform: uppercase;
}

.cert-meta {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px 18px;
  padding: 12px 14px;
  background: #f7f9fc;
  border: 1px solid var(--line);
  border-radius: 4px;
  margin-bottom: 18px;
}
.cert-meta .k {
  display: block;
  font-size: 10.5px;
  letter-spacing: 0.08em;
  color: var(--ink-400);
  margin-bottom: 1px;
}
.cert-meta .v { display: block; font-size: 12px; color: var(--ink-900); word-break: break-all; }

.cert-section { margin-top: 16px; }
.cert-section h2 {
  margin: 0 0 7px;
  padding-left: 8px;
  border-left: 3px solid var(--accent);
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--navy-800);
}

.cert-kv {
  display: grid;
  grid-template-columns: 104px minmax(0, 1fr);
  margin: 0;
  border: 1px solid var(--line);
  border-radius: 4px;
  overflow: hidden;
}
.cert-kv dt {
  padding: 6px 10px;
  font-size: 11.5px;
  color: var(--ink-500);
  background: #f5f8fb;
  border-bottom: 1px solid var(--line-soft);
}
.cert-kv dd {
  margin: 0;
  padding: 6px 10px;
  font-size: 12px;
  color: var(--ink-900);
  border-bottom: 1px solid var(--line-soft);
  word-break: break-all;
}
.cert-kv dt:last-of-type, .cert-kv dd:last-of-type { border-bottom: 0; }
.cert-kv .mono { font-size: 11.5px; }

.cert-foot {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 18px;
  margin-top: 22px;
  padding-top: 14px;
  border-top: 1px dashed #c3cfdd;
}
.cert-foot-left { flex: 1 1 auto; }
.cert-foot p { margin: 0 0 5px; font-size: 11.5px; color: var(--ink-500); }
.cert-foot p strong { color: var(--ink-700); }
.cert-foot .cert-note { margin-top: 8px; font-size: 10.5px; line-height: 1.55; color: var(--ink-400); }

.cert-seal {
  flex: 0 0 auto;
  width: 86px; height: 86px;
  border: 2px solid rgba(180, 35, 24, 0.58);
  border-radius: 50%;
  color: rgba(180, 35, 24, 0.72);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  line-height: 1.45;
  transform: rotate(-8deg);
  user-select: none;
}

/* ---------- 响应式 ---------- */

@media (max-width: 860px) {
  .detail-grid, .two-col { grid-template-columns: minmax(0, 1fr); }
  .topbar-inner { gap: 12px; padding: 10px 16px; }
  .brand-en { display: none; }
  .wrap { padding: 0 16px 36px; }
  .hero { padding-top: 22px; }
  .hero h1 { font-size: 25px; }
  .stat-value { font-size: 24px; }
  .cert-meta { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 600px) {
  .mode-badge { display: none; }
  .nav a { padding: 6px 9px; font-size: 13px; }
  .search-form { flex-direction: column; }
  .search-form .btn { width: 100%; }
  .kv { grid-template-columns: minmax(0, 1fr); }
  .kv dt { padding-bottom: 2px; border-bottom: 0; background: transparent; }
  .kv dd { padding-top: 2px; }
  .cert { padding: 22px 18px 26px; min-height: 0; }
  .cert-kv { grid-template-columns: 88px minmax(0, 1fr); }
  .cert-foot { flex-direction: column; align-items: flex-start; }
  .cert-seal { align-self: flex-end; }
}

/* ---------- 打印（A4） ---------- */

@media print {
  @page { size: A4; margin: 12mm; }

  body { background: #fff; font-size: 12px; }
  .no-print, .topbar, .site-foot, .cert-toolbar, .page-error { display: none !important; }

  .cert-page { max-width: none; margin: 0; padding: 0; }
  .cert {
    border: 0 !important;
    box-shadow: none !important;
    border-radius: 0;
    padding: 0;
    min-height: 0;
    overflow: visible;
  }
  .cert::after { display: none; }
  a { color: inherit !important; text-decoration: none !important; }
  .cert-meta, .cert-kv { break-inside: avoid; }
  .cert-section { break-inside: avoid; }
  .cert-seal { border-color: rgba(180, 35, 24, 0.5); color: rgba(180, 35, 24, 0.65); }
}