/* ============================================================
   健康事实库 HealthRef · 全站样式
   原则：内容优先、对比清晰、可打印、无装饰性动效
   ============================================================ */

:root {
  --ink: #1c1b1a;
  --ink-2: #4a4844;
  --ink-3: #7d7a74;
  --line: #e5e2db;
  --line-2: #efece6;
  --bg: #fbfaf8;
  --card: #ffffff;
  --accent: #1d6a4e;
  --accent-dark: #14503a;
  --accent-soft: #eaf4ef;
  --warn-soft: #fdf4e7;
  --warn-line: #e8c58a;
  --alert-soft: #fdefee;
  --alert-line: #e3aeaa;
  --radius: 10px;
  --radius-lg: 14px;
  --shadow: 0 1px 2px rgba(28, 27, 26, 0.04);
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC",
    -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
code {
  font-family: "SF Mono", ui-monospace, Menlo, Consolas, monospace;
  font-size: 0.86em;
  background: var(--line-2);
  padding: 1px 5px;
  border-radius: 4px;
}
time { font-variant-numeric: tabular-nums; }
h1, h2, h3 { line-height: 1.4; letter-spacing: -0.01em; }
p { margin: 0 0 14px; color: var(--ink-2); }
strong { color: var(--ink); }

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

.shell { max-width: 1080px; margin: 0 auto; padding: 0 24px; }

/* ---------------- 页头 ---------------- */
.site-header {
  position: sticky; top: 0; z-index: 20;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: saturate(180%) blur(8px);
  border-bottom: 1px solid var(--line);
}
.header-inner {
  display: flex; align-items: center; gap: 20px;
  min-height: 62px; flex-wrap: wrap;
}
.brand { display: flex; align-items: center; gap: 9px; text-decoration: none; }
.brand:hover { text-decoration: none; }
.brand-mark {
  width: 22px; height: 22px; border-radius: 6px; background: var(--accent);
  position: relative; flex: none;
}
.brand-mark::after {
  content: ""; position: absolute; inset: 6px 6px 6px 6px;
  border-left: 2px solid #fff; border-bottom: 2px solid #fff;
  transform: rotate(-45deg) scale(0.72); transform-origin: center;
}
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-text strong { font-size: 15.5px; font-weight: 600; color: var(--ink); }
.brand-text em { font-size: 10.5px; font-style: normal; color: var(--ink-3); letter-spacing: 0.08em; }

.site-nav { display: flex; gap: 18px; margin-left: auto; flex-wrap: wrap; }
.site-nav a { font-size: 14px; color: var(--ink-2); }
.site-nav a:hover { color: var(--accent); }

.header-search { display: flex; gap: 6px; }
.header-search input {
  width: 190px; padding: 7px 11px; font-size: 13.5px;
  border: 1px solid var(--line); border-radius: 8px; background: var(--bg);
  color: var(--ink); font-family: inherit;
}
.header-search input:focus { outline: 2px solid var(--accent-soft); border-color: var(--accent); }
.header-search button {
  padding: 7px 14px; font-size: 13.5px; border-radius: 8px; cursor: pointer;
  border: 1px solid var(--accent); background: var(--accent); color: #fff;
  font-family: inherit;
}
.header-search button:hover { background: var(--accent-dark); }
.header-search-page { margin-top: 16px; }
.header-search-page input { width: min(420px, 100%); padding: 10px 13px; font-size: 15px; }

/* 汉堡菜单按钮：桌面隐藏，移动端显示 */
.site-menu { display: flex; align-items: center; gap: 20px; flex: 1; min-width: 0; }
.menu-toggle {
  display: none; margin-left: auto; flex: none;
  width: 40px; height: 40px; padding: 0;
  align-items: center; justify-content: center;
  background: transparent; border: none; cursor: pointer;
}
.menu-icon, .menu-icon::before, .menu-icon::after {
  display: block; width: 20px; height: 2px; border-radius: 1px; background: var(--accent);
}
.menu-icon { position: relative; }
.menu-icon::before, .menu-icon::after { content: ""; position: absolute; left: 0; }
.menu-icon::before { top: -6px; }
.menu-icon::after { top: 6px; }
.menu-open .menu-icon { background: transparent; }
.menu-open .menu-icon::before { transform: translateY(6px) rotate(45deg); }
.menu-open .menu-icon::after { transform: translateY(-6px) rotate(-45deg); }

/* ---------------- 首页 hero ---------------- */
.hero { padding: 54px 0 34px; max-width: 820px; }
.hero h1 { font-size: 34px; font-weight: 600; margin: 6px 0 10px; }
.hero-lead { font-size: 19px; color: var(--ink); margin-bottom: 12px; }
.hero-desc { font-size: 15.5px; }
.hero-stats { font-size: 14px; color: var(--ink-3); }
.hero-stats strong { color: var(--accent); font-weight: 600; }
.eyebrow {
  font-size: 12px; letter-spacing: 0.06em; color: var(--accent);
  text-transform: uppercase; margin-bottom: 6px; font-weight: 500;
}

/* ---------------- 区块 ---------------- */
.section { margin: 44px 0; }
.section-title {
  font-size: 17px; font-weight: 600; margin: 0 0 18px;
  padding-bottom: 10px; border-bottom: 1px solid var(--line);
}
.block { margin: 34px 0; }
.block > h2 { font-size: 16px; font-weight: 600; margin: 0 0 14px; color: var(--ink); }
.note { font-size: 13px; color: var(--ink-3); }
.subsection-title { font-size: 15px; font-weight: 600; margin: 26px 0 12px; color: var(--ink); }

/* ---------------- 卡片网格 ---------------- */
.card-grid {
  display: grid; gap: 14px;
  grid-template-columns: repeat(auto-fill, minmax(310px, 1fr));
}
.fact-card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius-lg);
  padding: 18px 20px; box-shadow: var(--shadow);
}
.fact-card-q { font-size: 15.5px; font-weight: 600; margin: 0 0 8px; }
.fact-card-q a { color: var(--ink); }
.fact-card-q a:hover { color: var(--accent); text-decoration: none; }
.fact-card-a { font-size: 14px; margin-bottom: 12px; }
.fact-card-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; font-size: 12px; color: var(--ink-3); }

.badge {
  display: inline-block; font-size: 11.5px; padding: 2px 8px; border-radius: 999px;
  background: var(--line-2); color: var(--ink-2); border: 1px solid var(--line);
}
.badge-evidence { background: var(--accent-soft); color: var(--accent-dark); border-color: #cfe3da; }
.badge-primary { background: #e6effa; color: #1c4f86; border-color: #cfe0f2; margin-left: 5px; }

/* 权威模型披露：把「这份内容凭什么可信」写在明面上 */
.authority-note {
  background: #fbfdfc; border: 1px solid #cfe3da; border-left: 3px solid var(--accent);
  border-radius: 0 var(--radius) var(--radius) 0; padding: 14px 18px; margin-bottom: 20px;
}
.authority-note p { font-size: 14px; margin-bottom: 8px; }
.authority-note p:last-child { margin-bottom: 0; }
.authority-name { font-size: 13px; font-weight: 600; color: var(--accent-dark); margin-bottom: 6px; }
.chip {
  display: inline-block; font-size: 11.5px; padding: 2px 9px; border-radius: 999px;
  background: #fff; border: 1px solid var(--line); color: var(--ink-2);
}
.chip:hover { border-color: var(--accent); color: var(--accent); text-decoration: none; }

/* ---------------- 主题卡 ---------------- */
.topic-grid { display: grid; gap: 14px; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); }
.topic-card {
  display: block; background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius-lg); padding: 18px 20px; color: inherit;
  box-shadow: var(--shadow);
}
.topic-card:hover { border-color: var(--accent); text-decoration: none; }
.topic-card h3 { font-size: 16px; font-weight: 600; margin: 0 0 7px; color: var(--ink); }
.topic-card p { font-size: 13.5px; margin-bottom: 10px; }
.topic-count { font-size: 12px; color: var(--ink-3); }

/* ---------------- 原则卡 ---------------- */
.principle-grid { display: grid; gap: 14px; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); }
.principle { border-left: 2px solid var(--accent); padding: 2px 0 2px 15px; }
.principle h3 { font-size: 14.5px; font-weight: 600; margin: 0 0 6px; }
.principle p { font-size: 13.5px; margin: 0; }

/* ---------------- 面包屑 / 页头 ---------------- */
.breadcrumb {
  display: flex; flex-wrap: wrap; gap: 7px; align-items: center;
  font-size: 13px; color: var(--ink-3); padding: 22px 0 0;
}
.breadcrumb a { color: var(--ink-3); }
.breadcrumb a:hover { color: var(--accent); }
.page-header { padding: 20px 0 6px; }
.page-header h1 { font-size: 27px; font-weight: 600; margin: 4px 0 12px; }
.page-lead { font-size: 16px; color: var(--ink-2); max-width: 780px; }

/* ---------------- 事实页 ---------------- */
.fact-header { padding: 18px 0 8px; border-bottom: 1px solid var(--line); margin-bottom: 6px; }
.fact-header h1 { font-size: 28px; font-weight: 600; margin: 8px 0 18px; max-width: 820px; }
.direct-answer {
  font-size: 17.5px; line-height: 1.7; color: var(--ink); font-weight: 400;
  background: var(--accent-soft); border-left: 3px solid var(--accent);
  padding: 16px 20px; border-radius: 0 var(--radius) var(--radius) 0;
  margin: 0 0 18px; max-width: 860px;
}
.stamp-list {
  display: flex; flex-wrap: wrap; gap: 18px; list-style: none;
  margin: 0 0 20px; padding: 0; font-size: 12.5px; color: var(--ink-3);
}
.stamp-list strong { color: var(--ink-2); font-weight: 500; }

.ev {
  display: inline-block; min-width: 17px; text-align: center;
  font-size: 12px; font-weight: 600; padding: 1px 6px; border-radius: 5px;
}
.ev-A { background: #e6f3ec; color: #14503a; }
.ev-B { background: #e6effa; color: #1c4f86; }
.ev-C { background: #fdf3e4; color: #85561a; }
.ev-D { background: var(--line-2); color: var(--ink-2); }

.point-list { margin: 0; padding-left: 20px; }
.point-list li { margin-bottom: 9px; color: var(--ink-2); }

.kv { margin: 0; display: grid; grid-template-columns: 128px 1fr; gap: 10px 18px; }
.kv dt { font-size: 13.5px; color: var(--ink-3); }
.kv dd { margin: 0; font-size: 15px; color: var(--ink-2); }
.kv dd.kv-warn { color: #7d3f18; background: var(--warn-soft); border-left: 2px solid var(--warn-line); padding: 9px 14px; border-radius: 0 8px 8px 0; }
.kv-inline { grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 6px 22px; margin: 14px 0 0; }
.kv-inline dt { font-size: 12px; }
.kv-inline dd { font-size: 14px; margin-bottom: 10px; }

/* ---------------- 表格 ---------------- */
.data-table {
  width: 100%; border-collapse: collapse; font-size: 13.5px;
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden; margin: 0 0 14px;
}
.data-table th, .data-table td {
  padding: 9px 13px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top;
}
.data-table thead th { background: var(--accent-soft); font-weight: 600; color: var(--ink); white-space: nowrap; }
.data-table tbody th { background: var(--line-2); font-weight: 500; color: var(--ink-2); white-space: nowrap; }
.data-table tr:last-child th, .data-table tr:last-child td { border-bottom: none; }
.evidence-table td { color: var(--ink-2); }
.table-scroll { overflow-x: auto; }

/* ---------------- 署名 ---------------- */
.byline { display: grid; gap: 14px; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.byline-item { display: flex; flex-direction: column; gap: 3px; }
.byline-role { font-size: 11.5px; color: var(--ink-3); letter-spacing: 0.04em; }
.byline-item a { font-size: 15px; font-weight: 500; }
.byline-sub { font-size: 12.5px; color: var(--ink-3); }

.review-log { margin-top: 20px; }
.review-log summary {
  cursor: pointer; font-size: 13.5px; color: var(--accent); padding: 6px 0;
}
.review-log[open] summary { margin-bottom: 12px; }

/* ---------------- 引用 ---------------- */
.cite-grid { display: grid; gap: 12px; }
.cite-item { border: 1px solid var(--line); border-radius: var(--radius); background: var(--card); overflow: hidden; }
.cite-head {
  display: flex; justify-content: space-between; align-items: center;
  padding: 8px 14px; background: var(--line-2); font-size: 12.5px; color: var(--ink-2);
}
.copy-btn {
  font-family: inherit; font-size: 12px; padding: 3px 11px; cursor: pointer;
  border: 1px solid var(--line); background: #fff; border-radius: 6px; color: var(--ink-2);
}
.copy-btn:hover { border-color: var(--accent); color: var(--accent); }
.copy-btn.copied { background: var(--accent-soft); color: var(--accent-dark); border-color: #cfe3da; }
.cite-text {
  margin: 0; padding: 12px 14px; font-size: 12.5px; line-height: 1.65;
  white-space: pre-wrap; word-break: break-all; color: var(--ink-2);
  font-family: "SF Mono", ui-monospace, Menlo, Consolas, monospace;
}

/* ---------------- 链接列表 / 流程 ---------------- */
.link-list { list-style: none; margin: 0; padding: 0; }
.link-list li { padding: 9px 0; border-bottom: 1px solid var(--line-2); display: flex; flex-direction: column; gap: 2px; }
.link-list li:last-child { border-bottom: none; }

.flow-list { list-style: none; counter-reset: flow; margin: 0; padding: 0; }
.flow-list li {
  counter-increment: flow; position: relative; padding: 0 0 22px 46px;
  border-left: 1px solid var(--line); margin-left: 13px;
}
.flow-list li:last-child { border-left-color: transparent; padding-bottom: 0; }
.flow-list li::before {
  content: counter(flow); position: absolute; left: -13px; top: 0;
  width: 26px; height: 26px; border-radius: 50%; background: var(--accent); color: #fff;
  font-size: 13px; display: flex; align-items: center; justify-content: center; font-weight: 500;
}
.flow-list strong { display: block; font-size: 15px; margin-bottom: 5px; }
.flow-list p { font-size: 14px; margin: 0; }

/* ---------------- 人物 ---------------- */
.people-grid { display: grid; gap: 14px; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); }
.person-card {
  display: flex; flex-direction: column; gap: 3px; padding: 17px 19px;
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius-lg);
  color: inherit; box-shadow: var(--shadow);
}
.person-card:hover { border-color: var(--accent); text-decoration: none; }
.person-card strong { font-size: 16px; }
.person-card span { font-size: 13px; color: var(--ink-2); }
.person-card .note { font-size: 12.5px; color: var(--ink-3); }
.person-card .badge { align-self: flex-start; margin-top: 7px; }

/* ---------------- 按钮 ---------------- */
.btn {
  display: inline-block; padding: 8px 17px; border-radius: 8px; font-size: 14px;
  background: var(--accent); color: #fff; border: 1px solid var(--accent); cursor: pointer;
  font-family: inherit;
}
.btn:hover { background: var(--accent-dark); text-decoration: none; color: #fff; }
.btn-ghost { background: #fff; color: var(--ink-2); border-color: var(--line); }
.btn-ghost:hover { background: var(--bg); color: var(--accent); border-color: var(--accent); }

/* ---------------- 数据集 ---------------- */
.dataset-card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius-lg);
  padding: 22px 24px; margin-bottom: 16px; box-shadow: var(--shadow);
}
.dataset-card h2 { font-size: 18px; margin: 0 0 8px; font-weight: 600; }
.dataset-card h2 a { color: var(--ink); }
.dataset-card p { font-size: 14px; }
.dataset-actions { display: flex; flex-wrap: wrap; gap: 9px; margin: 16px 0 0; }

/* ---------------- 工具 ---------------- */
.tool-form {
  display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  align-items: end; background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius-lg); padding: 22px 24px; box-shadow: var(--shadow);
}
.field { display: flex; flex-direction: column; gap: 6px; }
.field label { font-size: 13px; color: var(--ink-2); }
.field input, .field select {
  padding: 9px 12px; font-size: 15px; font-family: inherit; color: var(--ink);
  border: 1px solid var(--line); border-radius: 8px; background: var(--bg);
}
.field input:focus, .field select:focus { outline: 2px solid var(--accent-soft); border-color: var(--accent); }
.tool-form .btn { justify-self: start; }

.tool-result {
  border: 1px solid var(--line); border-radius: var(--radius-lg);
  padding: 22px 24px; background: var(--card);
}
.tone-ok { border-color: #cfe3da; background: #fbfdfc; }
.tone-warn { border-color: var(--warn-line); background: var(--warn-soft); }
.tone-alert { border-color: var(--alert-line); background: var(--alert-soft); }
.tool-headline { font-size: 30px; font-weight: 600; color: var(--ink); margin: 0 0 4px; letter-spacing: -0.02em; }
.tool-category { font-size: 14px; color: var(--ink-2); margin-bottom: 16px; }
.tool-result .data-table { background: transparent; border: none; margin-bottom: 14px; }
.tool-result .data-table tbody th { background: transparent; padding-left: 0; border-bottom: 1px solid var(--line); }
.tool-result .data-table tbody td { border-bottom: 1px solid var(--line); }
.tool-interpretation { font-size: 14.5px; margin: 0; color: var(--ink-2); }
.stamp-line { display: flex; flex-wrap: wrap; gap: 20px; font-size: 13px; color: var(--ink-3); }

.callout { border-radius: var(--radius); padding: 15px 19px; font-size: 14.5px; }
.callout p:last-child { margin-bottom: 0; }
.callout-warn { background: var(--warn-soft); border-left: 3px solid var(--warn-line); }
.callout-warn p { color: #6f3c15; }

/* ---------------- 404 ---------------- */
.notfound { padding: 70px 0; max-width: 640px; }
.notfound h1 { font-size: 26px; margin-bottom: 14px; }
.notfound-actions { display: flex; gap: 10px; margin-top: 22px; }

/* ---------------- 页脚 ---------------- */
.site-footer {
  margin-top: 70px; border-top: 1px solid var(--line);
  background: #fff; padding: 34px 0 44px;
}
.disclaimer {
  font-size: 13.5px; color: var(--ink-2); background: var(--warn-soft);
  border-left: 3px solid var(--warn-line); padding: 12px 16px; border-radius: 0 8px 8px 0;
  margin-bottom: 28px;
}
.disclaimer strong { display: block; font-size: 12px; color: #6f3c15; margin-bottom: 3px; letter-spacing: 0.04em; }
.footer-grid {
  display: grid; gap: 26px; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  margin-bottom: 26px;
}
.footer-grid h2 {
  font-size: 12px; font-weight: 600; color: var(--ink-3); letter-spacing: 0.06em;
  margin: 0 0 10px; text-transform: uppercase;
}
.footer-grid ul { list-style: none; margin: 0; padding: 0; }
.footer-grid li { font-size: 13.5px; color: var(--ink-3); padding: 3px 0; }
.footer-grid a { color: var(--ink-2); }
.copyright { font-size: 12.5px; color: var(--ink-3); margin: 0; }

/* ---------------- 响应式 ---------------- */
@media (max-width: 860px) {
  .shell { padding: 0 18px; }
  .header-inner { padding: 12px 0; gap: 12px; flex-wrap: nowrap; }
  .menu-toggle { display: inline-flex; }
  .site-menu {
    display: none; position: absolute; top: 100%; left: 0; right: 0;
    flex-direction: column; align-items: stretch;
    background: var(--card); border-bottom: 1px solid var(--line);
    padding: 2px 18px 16px;
    box-shadow: 0 10px 18px rgba(28, 27, 26, 0.07);
  }
  .site-header.menu-open .site-menu { display: flex; }
  .site-nav { flex-direction: column; gap: 0; margin-left: 0; flex-wrap: nowrap; }
  .site-nav a { padding: 10px 2px; font-size: 15px; border-bottom: 1px solid var(--line-2); }
  .site-nav a:last-child { border-bottom: none; }
  .header-search { width: 100%; margin-top: 10px; padding-top: 12px; border-top: 1px solid var(--line-2); }
  .header-search input { flex: 1 1 auto; width: auto; min-width: 0; font-size: 16px; }
  .hero { padding: 34px 0 24px; }
  .hero h1 { font-size: 26px; }
  .fact-header h1 { font-size: 22px; }
  .direct-answer { font-size: 16px; padding: 14px 16px; }
  .kv { grid-template-columns: 1fr; gap: 3px 0; }
  .kv dt { margin-top: 10px; font-size: 12.5px; }
  .kv-inline { grid-template-columns: 1fr; }
  .tool-headline { font-size: 24px; }
  .data-table { font-size: 12.5px; }
  .data-table th, .data-table td { padding: 8px 10px; }
}

/* ---------------- 打印 ---------------- */
@media print {
  .site-header, .site-footer .footer-grid, .copy-btn, .tool-form, .notfound-actions { display: none; }
  body { background: #fff; font-size: 11pt; }
  .shell { max-width: none; padding: 0; }
  .fact-card, .dataset-card, .tool-result { box-shadow: none; break-inside: avoid; }
  .block, .section { break-inside: avoid; }
  a { color: var(--ink); text-decoration: none; }
  .cite-text { border: 1px solid var(--line); }
}