/* ==========================================================
   3D 导航矩阵 · 前台样式
   ========================================================== */

:root {
  --accent: #4f8cff;
  --radius: 16px;
  --bg-light: linear-gradient(135deg, #eef2ff 0%, #f8fafc 45%, #e0f2fe 100%);
  --bg-dark: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #0c0f1d 100%);
  --text-light: #0f172a;
  --text-dark: #f1f5f9;
  --card-bg-light: rgba(255, 255, 255, 0.55);
  --card-bg-dark: rgba(30, 41, 59, 0.45);
  --card-border-light: rgba(255, 255, 255, 0.6);
  --card-border-dark: rgba(148, 163, 184, 0.25);
  --shadow-light: 0 8px 30px rgba(79, 140, 255, 0.10);
  --shadow-dark: 0 8px 30px rgba(0, 0, 0, 0.35);
}

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

html, body { height: 100%; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Microsoft YaHei', sans-serif;
  color: var(--text-light);
  background: var(--bg-light);
  background-attachment: fixed;
  transition: background .4s, color .4s;
  min-height: 100vh;
}

body.theme-dark {
  color: var(--text-dark);
  background: var(--bg-dark);
}

/* ---------- 顶部导航栏 ---------- */
.topbar {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 5%;
  backdrop-filter: blur(12px);
  background: rgba(255, 255, 255, 0.55);
  border-bottom: 1px solid rgba(255, 255, 255, 0.5);
  transition: background .3s;
}
.theme-dark .topbar {
  background: rgba(15, 23, 42, 0.6);
  border-bottom: 1px solid rgba(148, 163, 184, 0.15);
}
.brand { font-weight: 800; font-size: 18px; display: flex; align-items: center; gap: 8px; }
.brand .logo {
  width: 28px; height: 28px; border-radius: 8px;
  background: linear-gradient(135deg, #22c55e, #16a34a);
  display: grid; place-items: center; color: #fff; font-size: 15px; font-weight: 800;
  box-shadow: 0 2px 8px rgba(34,197,94,.4);
}
.topbar nav ul { display: flex; list-style: none; gap: 4px; }
.topbar nav ul li a {
  display: block; padding: 8px 14px; border-radius: 8px;
  text-decoration: none; color: inherit; font-size: 14px; font-weight: 500;
  transition: background .2s, color .2s;
}
.topbar nav ul li a:hover, .topbar nav ul li a.active {
  background: var(--accent); color: #fff;
}
.topbar .actions { display: flex; gap: 8px; align-items: center; }
.icon-btn {
  border: none; cursor: pointer; width: 38px; height: 38px; border-radius: 10px;
  background: rgba(255,255,255,.6); color: inherit; font-size: 17px;
  display: grid; place-items: center; transition: background .2s;
}
.theme-dark .icon-btn { background: rgba(148,163,184,.15); }
.icon-btn:hover { background: rgba(79,140,255,.18); }

/* ---------- 主内容 ---------- */
.wrap { max-width: 1200px; margin: 0 auto; padding: 40px 5% 70px; }

.hero { text-align: center; margin-bottom: 42px; }
.hero h1 {
  font-size: clamp(28px, 5vw, 46px); font-weight: 900; letter-spacing: 2px;
  background: linear-gradient(135deg, var(--accent), #7c3aed);
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
.hero .subtitle { margin-top: 10px; font-size: 16px; opacity: .8; letter-spacing: 4px; }

.greeting {
  margin-top: 16px; font-size: 15px; font-weight: 600;
  display: inline-flex; align-items: center; gap: 8px;
  padding: 8px 18px; border-radius: 999px;
  background: rgba(79,140,255,.12); color: var(--accent);
}
.clock {
  margin-top: 14px; font-size: clamp(30px, 6vw, 56px);
  font-weight: 800; font-variant-numeric: tabular-nums; letter-spacing: 3px;
  text-shadow: 0 2px 20px rgba(79,140,255,.3);
}
.motto { margin-top: 14px; font-size: 14px; opacity: .75; font-style: italic; }
.date-line { margin-top: 8px; font-size: 15px; opacity: .7; font-weight: 500; }
.lunar-line { margin-top: 4px; font-size: 13px; opacity: .55; }

/* ---------- 导航卡片矩阵 ---------- */
.matrix-title { font-size: 14px; font-weight: 700; opacity: .85; margin-bottom: 12px; }
.rank-note { font-size: 12px; font-weight: 400; opacity: .5; margin-left: 8px; }
.more-wrap { text-align: center; margin-top: 10px; }
.more-btn {
  background: rgba(79,140,255,.1); color: var(--accent);
  border: 1px solid rgba(79,140,255,.3); border-radius: 20px;
  padding: 6px 20px; font-size: 13px; cursor: pointer;
  transition: background .2s;
}
.more-btn:hover { background: rgba(79,140,255,.2); }
.hidden-card { display: none !important; }

/* 电话弹窗 */
.modal-mask {
  display: none; position: fixed; inset: 0; z-index: 100;
  background: rgba(0,0,0,.45); backdrop-filter: blur(4px);
  align-items: center; justify-content: center;
}
.modal-mask.show { display: flex; }
.modal-box {
  background: #fff; border-radius: 16px; padding: 36px 40px;
  text-align: center; max-width: 360px; width: 90%;
  box-shadow: 0 20px 60px rgba(0,0,0,.2);
}
.theme-dark .modal-box { background: #1e293b; color: #f1f5f9; }
.modal-brand { font-size: 20px; font-weight: 800; margin-bottom: 16px; }
.modal-phone {
  font-size: 28px; font-weight: 800; color: var(--accent);
  letter-spacing: 2px; margin-bottom: 8px;
}
.modal-tip { font-size: 13px; opacity: .5; margin-bottom: 20px; }
.modal-close {
  background: var(--accent); color: #fff; border: none;
  padding: 10px 40px; border-radius: 8px; font-size: 15px;
  cursor: pointer;
}

.grid {
  display: grid; gap: 8px;
  grid-template-columns: repeat(10, 1fr);
}
.grid.auto { grid-template-columns: repeat(auto-fill, minmax(90px, 1fr)); }

.card {
  position: relative;
  border-radius: var(--radius);
  padding: 12px 8px;
  text-align: center;
  text-decoration: none; color: inherit;
  transition: transform .18s ease, box-shadow .25s ease, background .3s;
  box-shadow: var(--shadow-light);
}
.card-glass {
  background: var(--card-bg-light);
  backdrop-filter: blur(14px);
  border: 1px solid var(--card-border-light);
}
.card-solid { background: #ffffff; border: 1px solid #e5e7eb; }
.theme-dark .card-glass {
  background: var(--card-bg-dark);
  border: 1px solid var(--card-border-dark);
}
.theme-dark .card-solid { background: #1e293b; border-color: #334155; }

.card:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 24px rgba(79,140,255,.22);
}
.card .icon {
  width: 36px; height: 36px; margin: 0 auto 6px; border-radius: 10px;
  display: grid; place-items: center; overflow: hidden;
  background: rgba(79,140,255,.12); font-size: 18px;
}
.card .icon img { width: 100%; height: 100%; object-fit: contain; padding: 5px; }
.card .name { font-weight: 700; font-size: 12px; }
.card .cat {
  margin-top: 2px; font-size: 10px; opacity: .55;
  display: inline-block; padding: 1px 8px; border-radius: 999px;
  background: rgba(127,127,127,.12);
}

.category-row { margin-bottom: 20px; }

/* ---------- 页脚 ---------- */
footer {
  text-align: center; padding: 24px; font-size: 13px; opacity: .6;
}

/* 返回顶部 */
.to-top {
  position: fixed; right: 24px; bottom: 24px; z-index: 60;
  width: 44px; height: 44px; border-radius: 12px; border: none; cursor: pointer;
  background: var(--accent); color: #fff; font-size: 18px;
  display: none; box-shadow: 0 6px 20px rgba(79,140,255,.4);
}
.to-top.show { display: grid; place-items: center; }

/* ---------- 响应式 ---------- */
@media (max-width: 900px) { .grid { grid-template-columns: repeat(4, 1fr); gap: 8px; } }
@media (max-width: 520px) {
  .topbar { padding: 10px 4%; }
  /* 2026-10-16：此处原为 `.topbar nav ul { display: none; }`，
     会把手机端全站顶栏导航整个隐藏掉。已移除，改为文件末尾
     「手机端顶栏导航可用性修复」区块的横向滚动方案。 */
  .grid { grid-template-columns: repeat(3, 1fr); gap: 8px; }
  .card { padding: 10px 6px; }
  .card .icon { width: 30px; height: 30px; font-size: 15px; }
  .card .name { font-size: 11px; }
}

/* ================================================================
   公共布局兜底 / Layout Fallback                      （v10 新增）
   ----------------------------------------------------------------
   背景：本站前台模板各自手写 <head>，历史上多处用相对路径引入
   style.css（assets/css/style.css）。在 /article/、/faultcode/、/case/
   这类「二级路径」下会被浏览器解析为 /article/assets/... → 404，
   Nginx try_files 回退到 index.php 并以 text/html 返回，浏览器因
   MIME 不符拒绝应用 → 顶栏导航退化成竖排 <ul>（文字堆叠、样式丢失）。
   本区块把「顶栏导航 + 侧边栏 + 两级布局」的基础骨架收敛到公共 CSS，
   所有引入本文件的页面（含后续新增的文章页）自动继承；
   配合 includes/functions.php 的 front_layout_css() 内联关键 CSS，
   即使外部样式表加载失败，页面骨架也不会塌。
   ================================================================ */

/* --- 1) 顶栏导航兜底：任何情况下都不退化成带项目符号的竖排列表 --- */
.topbar nav ul { display: flex; flex-wrap: wrap; align-items: center; list-style: none; margin: 0; padding: 0; gap: 4px; }
.topbar nav ul li { display: block; list-style: none; }
.topbar nav ul li::marker { content: ''; font-size: 0; }

/* --- 2) 两级布局：左侧导航 + 右侧内容 --- */
.layout { display: flex; align-items: flex-start; gap: 20px; }
.layout > main { flex: 1; min-width: 0; }
.article-layout { display: flex; align-items: flex-start; gap: 24px; }
.article-main { flex: 1; min-width: 0; }

/* --- 3) 侧边栏基础样式（此前只散落在首页内联样式与 @media 里，公共 CSS 缺定义） --- */
.sidebar, .side-nav, .article-side {
  width: 140px; flex-shrink: 0; align-self: flex-start; position: sticky; top: 70px;
}
.article-side { width: 220px; }
.side-btns { display: flex; flex-direction: column; gap: 10px; padding: 10px 0; }
.side-btns a, .side-nav a {
  display: block; padding: 12px 16px; background: #fff; border: 1px solid #e5e7eb;
  border-radius: 10px; text-decoration: none; color: #333; font-size: 14px;
  text-align: center; box-shadow: 0 1px 3px rgba(0,0,0,.08);
  transition: transform .15s ease, box-shadow .2s ease, background .2s ease;
}
.side-btns a:hover, .side-nav a:hover { transform: translateY(-1px); box-shadow: 0 4px 12px rgba(79,140,255,.18); }
.side-btns a.active, .side-nav a.active { background: var(--accent); border-color: transparent; color: #fff; font-weight: 700; }
.theme-dark .side-btns a, .theme-dark .side-nav a { background: #1e293b; border-color: #334155; color: #f1f5f9; }
.theme-dark .side-btns a.active, .theme-dark .side-nav a.active { background: var(--accent); color: #fff; }

/* --- 4) 卡片图标：emoji / 文字图标与图片图标统一占位 --- */
.card .icon .ico-emoji, .card .icon .ico-fallback {
  display: grid; place-items: center; width: 100%; height: 100%;
  font-size: 22px; line-height: 1; font-style: normal;
}

/* --- 5) 失效图片占位（渲染层兜底，配合 sanitize_legacy_content） --- */
.img-missing {
  display: inline-block; padding: 6px 10px; font-size: 13px; color: #94a3b8;
  background: rgba(148,163,184,.12); border: 1px dashed rgba(148,163,184,.5); border-radius: 8px;
}

/* --- 6) 窄屏兜底 --- */
@media (max-width: 768px) {
  .layout, .article-layout { flex-direction: column; padding: 0 12px; }
  .sidebar, .side-nav, .article-side { width: 100%; position: static; top: auto; }
  .side-btns { flex-direction: row; flex-wrap: wrap; padding: 4px 0; }
  .side-btns a, .side-nav a { flex: 1; min-width: 70px; padding: 10px 6px; font-size: 13px; }
}

/* ================================================================
   手机端顶栏导航可用性修复                        （2026-10-16 新增）
   ----------------------------------------------------------------
   背景：上方 @media (max-width: 520px) 区块里写的是
     .topbar nav ul { display: none; }
   也就是 520px 以下（绝大多数手机竖屏）会把全站顶栏导航整个隐藏，
   用户只能靠页面正文里的链接跳转，没法从顶栏进入「故障代码」「联系我」。
   本区块刻意放在文件末尾：CSS 特异性相同时后出现的规则胜出，
   因此能覆盖前面的 display:none 以及后面公共兜底区的 flex-wrap:wrap，
   把顶栏改为「品牌 + 横向可滚动导航 + 主题按钮」的紧凑布局。
   ================================================================ */
@media (max-width: 520px) {
  .topbar { padding: 10px 4%; gap: 8px; }
  .topbar .brand { font-size: 16px; flex: 0 0 auto; }
  .topbar .brand .logo { width: 24px; height: 24px; font-size: 13px; }
  .topbar nav { flex: 1 1 auto; min-width: 0; }
  .topbar nav ul {
    display: flex; flex-wrap: nowrap; gap: 2px;
    overflow-x: auto; -webkit-overflow-scrolling: touch;
    scrollbar-width: none; -ms-overflow-style: none;
  }
  .topbar nav ul::-webkit-scrollbar { display: none; }
  .topbar nav ul li { flex: 0 0 auto; display: block; list-style: none; }
  .topbar nav ul li a { padding: 7px 9px; font-size: 13px; white-space: nowrap; }
  .topbar .actions { flex: 0 0 auto; }
  .icon-btn { width: 34px; height: 34px; font-size: 15px; }
}
@media (max-width: 360px) {
  .topbar nav ul li a { padding: 6px 7px; font-size: 12px; }
}
/* ---------- 文章正文表格（2026-10-31 追加） ---------- */
.page-body table {
  width: 100%; border-collapse: collapse; margin: 18px 0 22px;
  font-size: 15px; line-height: 1.65;
  display: block; overflow-x: auto; -webkit-overflow-scrolling: touch;
  min-width: 0;
}
.page-body table thead, .page-body table tbody { display: block; min-width: 560px; }
@media (min-width: 700px) {
  .page-body table { display: table; }
  .page-body table thead { display: table-header-group; }
  .page-body table tbody { display: table-row-group; min-width: 0; }
}
.page-body th, .page-body td {
  border: 1px solid rgba(34, 197, 94, .22);
  padding: 10px 12px; text-align: left; vertical-align: top;
}
.page-body th { background: #f4fdf8; color: #0d7a3f; font-weight: 700; white-space: nowrap; }
.page-body tbody tr:nth-child(even) td { background: #fbfefc; }
.theme-dark .page-body th { background: #14251c; color: #6ee7a8; }
.theme-dark .page-body th, .theme-dark .page-body td { border-color: rgba(110, 231, 168, .18); }
.theme-dark .page-body tbody tr:nth-child(even) td { background: rgba(255, 255, 255, .03); }