/* 子页面皮肤 · 与首页 site.html 同一套视觉语言
   宣纸底 #FAF8F3 / 墨 #111 / 朱红 #C8102E / 细边 #E8E2D5 / 宋体标题
   只定义子页面用到的类，不改动首页（首页样式内联在 site.html 里） */

* { box-sizing: border-box }
html, body { margin: 0; padding: 0 }
body {
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  color: #222;
  background: #FAF8F3;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none }
h1, h2, h3 { margin: 0; line-height: 1.35; color: #111 }

.wrap { max-width: 1240px; margin: 0 auto; padding: 0 20px }

/* ── 导航（同首页：吸顶 + 毛玻璃 + 朱红方印） ── */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(250,248,243,.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid #E8E2D5;
}
.nav-in { display: flex; align-items: center; gap: 24px; height: 68px }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 18px; color: #111 }
.brand-mark {
  width: 38px; height: 38px; background: #C8102E; color: #fff;
  display: grid; place-items: center; border-radius: 6px;
  font-family: serif; font-size: 19px;
  box-shadow: 2px 2px 0 rgba(200,16,46,.18);
}
.brand-name { white-space: nowrap }
.nav-links { display: flex; gap: 22px; margin-left: auto }
.nav-links a { color: #333; font-size: 14.5px; white-space: nowrap }
.nav-links a:hover { color: #C8102E }
.nav-cta { display: flex; gap: 10px; margin-left: 4px }

/* ── 按钮（同首页） ── */
.btn {
  display: inline-block; padding: 12px 26px; border-radius: 8px;
  border: 1px solid #111; color: #111; font-size: 14px; font-weight: 700;
  background: #fff; cursor: pointer; transition: .2s;
}
.btn:hover { background: #FAF8F3 }
.btn-primary { background: #C8102E; border-color: #C8102E; color: #fff }
.btn-primary:hover { background: #A80D26; border-color: #A80D26; color: #fff }
.btn-ghost { background: #fff; border-color: #111; color: #111 }
.btn-sm { padding: 8px 16px; font-size: 13.5px }

/* ── 页头（替代原来的深色 hero） ── */
.head {
  padding: 56px 0 34px;
  background: #FAF8F3;
  border-bottom: 1px solid #E8E2D5;
}
.head .crumbs { font-size: 13.5px; color: #888; margin-bottom: 14px }
.head .crumbs a { color: #C8102E }
.head .crumbs span { margin: 0 7px; color: #bbb }
.head h1 {
  font-size: clamp(30px, 4vw, 44px); font-weight: 800; letter-spacing: -.02em;
  font-family: "Songti SC", "STSong", "Noto Serif SC", serif;
}
.head .lead {
  margin: 18px 0 0; font-size: 16.5px; color: #333; max-width: 46em;
}
.head .lead b { color: #111 }

.chips { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 22px }
.chip {
  padding: 7px 16px; border: 1px solid #E8E2D5; border-radius: 999px;
  background: #fff; font-size: 13.5px; font-weight: 600; color: #333;
}

/* ── 提示块 ── */
.note {
  margin: 20px 0; padding: 16px 18px;
  background: #FFF; border: 1px solid #E8E2D5;
  border-left: 3px solid #111; border-radius: 8px;
  font-size: 14.5px; color: #333;
}
.note b { color: #111 }
.note-warn { border-left-color: #C8102E; background: #FDF3F5; border-color: #F0CDD4 }
.note-warn b { color: #C8102E }

/* ── 正文 ── */
.doc { padding: 26px 0 72px }
.doc section { padding: 40px 0; border-bottom: 1px dashed #E8E2D5 }
.doc section:last-child { border-bottom: 0 }
.doc h2 {
  font-size: 26px; font-weight: 800; letter-spacing: -.01em;
  font-family: "Songti SC", "STSong", "Noto Serif SC", serif;
  padding-left: 14px; border-left: 4px solid #C8102E;
  margin-bottom: 18px;
}
.doc h3 { font-size: 19px; font-weight: 800; margin: 26px 0 10px }
.doc p { color: #333; font-size: 15.5px; margin: 14px 0 }
.doc p b, .doc li b { color: #111 }
.doc ul, .doc ol { margin: 14px 0; padding-left: 22px }
.doc li { color: #333; font-size: 15.5px; margin: 9px 0 }
.doc code {
  background: #F2EFE8; border: 1px solid #E8E2D5; border-radius: 4px;
  padding: 1px 6px; font-size: 13.5px;
}
.doc figure { margin: 26px 0 8px }
.doc figure img { display: block }
/* 正文里的普通链接才是朱红；按钮必须单独压回来，
   否则 `.doc a`（0,1,1）会盖掉 `.btn-primary`（0,1,0）的白字，红底红字看不见 */
.doc a { color: #C8102E; font-weight: 600 }
.doc a:hover { text-decoration: underline }
.doc a.btn { color: #111; font-weight: 700; text-decoration: none }
.doc a.btn-primary { color: #fff }
.doc a.btn-ghost { color: #111 }
.cta .btn-primary,
.cta a.btn-primary { color: #fff }

/* ── 表格 ── */
.table-scroll { overflow-x: auto; margin: 20px 0; border-radius: 12px }
table {
  width: 100%; border-collapse: collapse; background: #fff;
  border: 1px solid #E8E2D5; border-radius: 12px; overflow: hidden;
  font-size: 14.5px;
}
th {
  background: #FAF8F3; color: #111; font-weight: 800; text-align: left;
  padding: 14px 16px; border-bottom: 1px solid #E8E2D5; white-space: nowrap;
}
td { padding: 14px 16px; border-bottom: 1px solid #F0EDE6; color: #333; vertical-align: top }
tr:last-child td { border-bottom: 0 }

/* ── FAQ（details 折叠，同首页白卡片） ── */
.faq { max-width: 860px; margin: 0 auto }
.faq details {
  background: #fff; border: 1px solid #E8E2D5; border-radius: 10px;
  margin-bottom: 12px; overflow: hidden;
}
.faq summary {
  padding: 16px 20px; font-weight: 700; cursor: pointer;
  list-style: none; display: flex; justify-content: space-between; align-items: center;
  color: #111;
}
.faq summary::-webkit-details-marker { display: none }
.faq summary::after { content: "﹀"; color: #C8102E; font-size: 13px }
.faq details[open] summary::after { content: "︿" }
.faq details p { padding: 0 20px 16px; color: #333; font-size: 14.5px; margin: 0 }

/* ── 底部行动区（同首页深色带） ── */
/* ── 底部咨询区（宣纸卡 + 朱红描边，不用黑底） ── */
.cta {
  background: #fff; color: #222; text-align: center;
  max-width: 860px; margin: 8px auto 0; padding: 44px 32px; border-radius: 14px;
  border: 1px solid #E8E2D5;
  box-shadow: 0 10px 30px rgba(17, 17, 17, .05);
}
.cta h2 {
  color: #111; font-size: 28px; border: 0; padding: 0; margin-bottom: 14px;
  font-family: "Songti SC", "STSong", "Noto Serif SC", serif;
}
.cta p { color: #333; max-width: 40em; margin: 0 auto 22px; font-size: 15px }
.cta .cta-b { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap }
.cta .btn-ghost { background: #fff; border-color: #111; color: #111 }
.cta .btn-ghost:hover { background: #FAF8F3 }
.cta a.btn-primary { color: #fff }
.cta a.btn-ghost { color: #111 }
.cta .price { font-size: 13.5px; color: #666; margin: 16px 0 0 }

/* 仅屏幕阅读器可见 */
.sr {
  position: absolute; width: 1px; height: 1px;
  overflow: hidden; clip: rect(0 0 0 0);
}
.cta .cta-links { margin: 20px 0 0; font-size: 13.5px; color: #888 }
.cta .cta-links a { color: #C8102E; font-weight: 600 }

/* ── 页脚（宣纸浅色：白底 + 上细线） ── */
.foot {
  margin-top: 72px;
  border-top: 1px solid #E8E2D5;
  background: #FFF;
  padding: 44px 0 0;
}
.foot-in { display: grid; grid-template-columns: 1.5fr 1fr 1fr; gap: 32px }
.foot-brand { display: flex; align-items: center; gap: 10px; font-weight: 700; color: #111 }
.foot p { color: #555; font-size: 14px; margin: 14px 0 0 }
.foot h4 {
  font-size: 13.5px; letter-spacing: .04em; color: #111; margin: 0 0 12px;
}
.foot a { display: block; font-size: 14.5px; color: #555; margin: 7px 0 }
.foot a:hover { color: #C8102E }
.copyright {
  margin-top: 32px; border-top: 1px solid #E8E2D5;
  padding: 16px 0; font-size: 13px; color: #888;
}

/* ── 博客列表 ── */
.post-list { list-style: none; padding: 0; margin: 18px 0 0 }
.post-list li {
  background: #FFF; border: 1px solid #E8E2D5; border-radius: 12px;
  padding: 24px 26px; margin: 0 0 16px;
}
.post-list li h3 { margin: 0 0 6px; font-size: 19px; font-weight: 800 }
.post-list li h3 a { color: #111; text-decoration: none }
.post-list li h3 a:hover { color: #C8102E }
.meta { font-size: 13px; color: #888; margin: 0 0 10px !important }

/* ── 响应式 ── */
@media (max-width: 960px) {
  .nav-links { display: none }
  .head { padding: 40px 0 26px }
  .foot-in { grid-template-columns: 1fr 1fr }
}
@media (max-width: 680px) {
  .doc section { padding: 30px 0 }
  .doc h2 { font-size: 22px }
  .cta { padding: 40px 20px }
  .cta .cta-b .btn { width: 100% }
  .foot-in { grid-template-columns: 1fr }
}