/* ============================================
   heishanshi.com 全站公共样式
   引用方式: <link rel="stylesheet" href="/assets/site.css">
   品牌基调: 墨黑石面 · 宣纸米白 · 描金点缀
   ============================================ */

:root {
  --ink: #16181a;        /* 墨黑: 深色区块背景 */
  --stone: #2e3134;      /* 石灰: 次级深色 */
  --paper: #f5f2ec;      /* 宣纸: 正文背景 */
  --paper-dim: #ebe6dc;  /* 宣纸暗部: 卡片/分隔 */
  --gold: #b8944e;       /* 描金: 主强调色 */
  --cinnabar: #a63f2e;   /* 朱砂: 仅用于极少量点缀 */
  --text: #26282a;       /* 正文字色 */
  --text-dim: #6b6e71;   /* 辅助字色 */
  --serif: "Noto Serif SC", "Songti SC", "SimSun", serif;
  --sans: "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  --maxw: 1080px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}

body {
  font-family: var(--sans);
  color: var(--text);
  background: var(--paper);
  line-height: 1.85;
  font-size: 16px;
}

a { color: var(--gold); text-decoration: none; }
a:hover { text-decoration: underline; }
a:focus-visible { outline: 2px solid var(--gold); outline-offset: 2px; }

img { max-width: 100%; height: auto; display: block; }

/* ---------- 顶部导航 ---------- */
.site-header {
  background: var(--ink);
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid rgba(184,148,78,.35);
}
.site-header .wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 60px;
  flex-wrap: wrap;
}
.brand {
  font-family: var(--serif);
  font-size: 19px;
  color: #f0ece3;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 0;
}
.brand:hover { text-decoration: none; }
.brand .seal {
  width: 32px; height: 32px;
  background: var(--gold);
  color: var(--ink);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 17px;
  font-weight: 700;
  border-radius: 4px;
  font-family: var(--serif);
}
.brand em { font-style: normal; color: var(--gold); }
.site-nav { display: flex; gap: 4px; flex-wrap: wrap; padding: 8px 0; }
.site-nav a {
  color: #cfcac0;
  font-size: 14.5px;
  padding: 7px 13px;
  border-radius: 4px;
}
.site-nav a:hover { color: #fff; background: rgba(255,255,255,.07); text-decoration: none; }
.site-nav a.on { color: var(--gold); }
.site-nav a.cta {
  background: var(--gold);
  color: var(--ink);
  font-weight: 600;
}
.site-nav a.cta:hover { background: #cba75f; }

/* ---------- 面包屑 ---------- */
.breadcrumb {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 14px 20px 0;
  font-size: 13.5px;
  color: var(--text-dim);
}
.breadcrumb a { color: var(--text-dim); }
.breadcrumb a:hover { color: var(--gold); }
.breadcrumb span { margin: 0 6px; color: #b9b4aa; }

/* ---------- 页面标题区 ---------- */
.page-head {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 34px 20px 10px;
}
.page-head h1 {
  font-family: var(--serif);
  font-size: clamp(26px, 4.5vw, 38px);
  line-height: 1.35;
  color: var(--ink);
  font-weight: 700;
}
.page-head .sub {
  margin-top: 12px;
  color: var(--text-dim);
  font-size: 15.5px;
  max-width: 720px;
}
.page-head .meta {
  margin-top: 14px;
  font-size: 13px;
  color: var(--text-dim);
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
}
.page-head .meta b { color: var(--gold); font-weight: 600; }

/* ---------- 正文容器 ---------- */
.article {
  max-width: 780px;
  margin: 0 auto;
  padding: 20px 20px 40px;
}
.article h2 {
  font-family: var(--serif);
  font-size: 24px;
  margin: 42px 0 16px;
  padding-left: 14px;
  border-left: 4px solid var(--gold);
  color: var(--ink);
}
.article h3 { font-size: 18px; margin: 28px 0 10px; color: var(--ink); }
.article p { margin: 0 0 16px; }
.article ul, .article ol { margin: 0 0 16px 1.4em; }
.article li { margin-bottom: 6px; }
.article figure { margin: 24px 0; }
.article figcaption {
  font-size: 13px;
  color: var(--text-dim);
  margin-top: 8px;
  text-align: center;
}
.article .summary {
  background: var(--paper-dim);
  border-left: 4px solid var(--gold);
  padding: 16px 20px;
  border-radius: 0 6px 6px 0;
  margin: 22px 0 30px;
  font-size: 15.5px;
}
.article table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
  font-size: 15px;
}
.article th, .article td {
  border: 1px solid #d8d2c6;
  padding: 10px 14px;
  text-align: left;
}
.article th { background: var(--paper-dim); font-weight: 600; }

/* ---------- FAQ ---------- */
.faq { margin: 30px 0; }
.faq details {
  border: 1px solid #ddd7cb;
  border-radius: 6px;
  margin-bottom: 10px;
  background: #fff;
}
.faq summary {
  cursor: pointer;
  padding: 14px 18px;
  font-weight: 600;
  color: var(--ink);
  list-style: none;
}
.faq summary::before { content: "问 "; color: var(--gold); font-family: var(--serif); }
.faq details[open] summary { border-bottom: 1px solid #eee8dc; }
.faq .a { padding: 14px 18px; font-size: 15px; }
.faq .a::before { content: "答 "; color: var(--cinnabar); font-family: var(--serif); }

/* ---------- 延伸阅读 ---------- */
.related {
  max-width: 780px;
  margin: 0 auto;
  padding: 0 20px 30px;
}
.related h2 {
  font-family: var(--serif);
  font-size: 20px;
  margin-bottom: 14px;
  color: var(--ink);
}
.related ul { list-style: none; }
.related li {
  border-bottom: 1px dashed #d8d2c6;
  padding: 10px 0;
}
.related li a { color: var(--text); }
.related li a:hover { color: var(--gold); }
.related li a::before { content: "› "; color: var(--gold); }

/* ---------- 询价条 ---------- */
.inquiry {
  background: var(--ink);
  color: #e9e4da;
  margin-top: 30px;
}
.inquiry .wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 40px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}
.inquiry h2 {
  font-family: var(--serif);
  font-size: 24px;
  color: #fff;
  margin-bottom: 8px;
}
.inquiry p { font-size: 14.5px; color: #b7b1a6; max-width: 480px; }
.inquiry .btns { display: flex; gap: 12px; flex-wrap: wrap; }
.inquiry a.tel {
  background: var(--gold);
  color: var(--ink);
  font-weight: 700;
  padding: 13px 26px;
  border-radius: 6px;
  font-size: 16px;
}
.inquiry a.tel:hover { background: #cba75f; text-decoration: none; }
.inquiry a.wx {
  border: 1px solid rgba(184,148,78,.6);
  color: var(--gold);
  padding: 13px 26px;
  border-radius: 6px;
  font-size: 16px;
}
.inquiry a.wx:hover { background: rgba(184,148,78,.12); text-decoration: none; }

/* ---------- 页脚 ---------- */
.site-footer {
  background: #101214;
  color: #8d8880;
  font-size: 13.5px;
}
.site-footer .wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 30px 20px;
}
.site-footer nav {
  display: flex;
  gap: 4px 18px;
  flex-wrap: wrap;
  margin-bottom: 14px;
}
.site-footer a { color: #aaa49a; }
.site-footer a:hover { color: var(--gold); }

/* ---------- 知识库首页专用 ---------- */
.kb-hero {
  background: var(--ink);
  color: #ece7dd;
  position: relative;
  overflow: hidden;
}
.kb-hero .wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 56px 20px 60px;
  position: relative;
}
.kb-hero .vertical {
  position: absolute;
  right: 28px;
  top: 44px;
  writing-mode: vertical-rl;
  font-family: var(--serif);
  font-size: 15px;
  letter-spacing: .5em;
  color: rgba(184,148,78,.55);
  border-right: 1px solid rgba(184,148,78,.35);
  padding-right: 12px;
  user-select: none;
}
.kb-hero h1 {
  font-family: var(--serif);
  font-size: clamp(28px, 5vw, 42px);
  color: #fff;
  font-weight: 700;
  line-height: 1.3;
}
.kb-hero h1 em { font-style: normal; color: var(--gold); }
.kb-hero p {
  margin-top: 16px;
  max-width: 620px;
  color: #b7b1a6;
  font-size: 15.5px;
}
.kb-section {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 44px 20px 6px;
}
.kb-section > header {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 20px;
}
.kb-section > header .vol {
  font-family: var(--serif);
  font-size: 15px;
  color: var(--gold);
  border: 1px solid var(--gold);
  padding: 2px 10px;
  border-radius: 3px;
  white-space: nowrap;
}
.kb-section > header h2 {
  font-family: var(--serif);
  font-size: 24px;
  color: var(--ink);
}
.kb-section > header .hint {
  font-size: 13.5px;
  color: var(--text-dim);
}
.kb-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 14px;
}
.kb-card {
  background: #fff;
  border: 1px solid #e2dccf;
  border-radius: 8px;
  padding: 18px 20px;
  display: block;
  color: var(--text);
  transition: border-color .15s, transform .15s;
}
.kb-card:hover {
  border-color: var(--gold);
  text-decoration: none;
  transform: translateY(-2px);
}
.kb-card h3 { font-size: 16.5px; color: var(--ink); margin-bottom: 6px; }
.kb-card p { font-size: 13.5px; color: var(--text-dim); line-height: 1.7; }
.kb-card .go { font-size: 13px; color: var(--gold); margin-top: 10px; display: inline-block; }
.kb-card.soon {
  background: transparent;
  border-style: dashed;
  color: var(--text-dim);
  cursor: default;
}
.kb-card.soon:hover { border-color: #d0c9ba; transform: none; }
.kb-card.soon h3 { color: var(--text-dim); }
.kb-card.soon .tag {
  font-size: 12px;
  color: #b0aa9e;
  border: 1px solid #d5cfc1;
  border-radius: 3px;
  padding: 1px 7px;
  margin-top: 10px;
  display: inline-block;
}

@media (max-width: 640px) {
  .kb-hero .vertical { display: none; }
  .site-header .wrap { padding: 0 14px; }
  .site-nav a { padding: 7px 9px; font-size: 13.5px; }
}