/* ============ 软考高级 - 系统架构设计师 冲刺站 ============ */
:root {
  --bg: #0b1220;
  --bg-soft: #121a2b;
  --bg-card: #172033;
  --bg-card-2: #1e2842;
  --border: #243049;
  --text: #e6edf6;
  --text-soft: #aab3c5;
  --text-mute: #7a8499;
  --primary: #58a6ff;
  --primary-soft: rgba(88, 166, 255, 0.14);
  --accent: #f7c948;
  --accent-soft: rgba(247, 201, 72, 0.14);
  --danger: #ff6b6b;
  --danger-soft: rgba(255, 107, 107, 0.14);
  --success: #4ade80;
  --success-soft: rgba(74, 222, 128, 0.14);
  --shadow: 0 6px 22px rgba(0, 0, 0, 0.28);
  --radius: 14px;
  --radius-sm: 9px;
  --max-width: 880px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC",
    "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.72;
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
  word-wrap: break-word;
  overflow-wrap: break-word;
}

a { color: var(--primary); text-decoration: none; }
a:active { opacity: 0.7; }

/* ========== 顶部导航 ========== */
.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(11, 18, 32, 0.92);
  backdrop-filter: saturate(180%) blur(10px);
  -webkit-backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--border);
}
.topbar-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 12px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand {
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 0.4px;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 8px;
}
.brand-badge {
  background: var(--primary-soft);
  color: var(--primary);
  padding: 2px 8px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 600;
}
.topbar-back {
  color: var(--primary);
  font-size: 14px;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

/* ========== 容器 ========== */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 20px 16px 80px;
}

/* ========== 标题区 ========== */
.hero {
  padding: 18px 0 8px;
}
.hero h1 {
  font-size: 26px;
  margin: 0 0 6px;
  letter-spacing: 0.4px;
  font-weight: 700;
}
.hero .subtitle {
  color: var(--text-soft);
  font-size: 14px;
  margin: 0;
}
.hero .meta {
  margin-top: 12px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.tag {
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-soft);
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 12.5px;
}
.tag.primary { color: var(--primary); border-color: rgba(88,166,255,0.35); }
.tag.accent { color: var(--accent); border-color: rgba(247,201,72,0.35); }
.tag.danger { color: var(--danger); border-color: rgba(255,107,107,0.35); }
.tag.success { color: var(--success); border-color: rgba(74,222,128,0.35); }

/* ========== 模块/卡片 ========== */
.section {
  margin-top: 26px;
}
.section h2 {
  font-size: 19px;
  margin: 0 0 12px;
  padding-left: 10px;
  border-left: 4px solid var(--primary);
  line-height: 1.4;
}
.section h3 {
  font-size: 16.5px;
  margin: 22px 0 10px;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 6px;
}
.section h3::before {
  content: "";
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
  display: inline-block;
}
.section h4 {
  font-size: 15px;
  margin: 16px 0 8px;
  color: var(--primary);
}
.section p {
  margin: 8px 0;
  color: var(--text);
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
  box-shadow: var(--shadow);
  margin: 10px 0;
}
.card-title {
  font-weight: 600;
  font-size: 15.5px;
  margin: 0 0 6px;
}
.card-desc { color: var(--text-soft); font-size: 14px; }

/* ========== 重点框 ========== */
.callout {
  border-radius: var(--radius);
  padding: 12px 14px;
  margin: 12px 0;
  border-left: 4px solid;
  background: var(--bg-card);
}
.callout-title {
  font-weight: 700;
  font-size: 14px;
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 6px;
}
.callout-body { font-size: 14.5px; color: var(--text); }
.callout-body p { margin: 6px 0; }
.callout.info { border-color: var(--primary); background: var(--primary-soft); }
.callout.info .callout-title { color: var(--primary); }
.callout.warn { border-color: var(--accent); background: var(--accent-soft); }
.callout.warn .callout-title { color: var(--accent); }
.callout.danger { border-color: var(--danger); background: var(--danger-soft); }
.callout.danger .callout-title { color: var(--danger); }
.callout.success { border-color: var(--success); background: var(--success-soft); }
.callout.success .callout-title { color: var(--success); }

/* ========== 列表 ========== */
ul.clean, ol.clean {
  padding-left: 22px;
  margin: 8px 0;
}
ul.clean li, ol.clean li { margin: 5px 0; }

/* 知识点要点表 */
.kv {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 6px 14px;
  margin: 10px 0;
  font-size: 14.5px;
}
.kv .k { color: var(--text-mute); font-weight: 600; }
.kv .v { color: var(--text); }

/* ========== 表格 ========== */
.table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }
table.t {
  width: 100%;
  border-collapse: collapse;
  font-size: 13.8px;
  margin: 8px 0;
  background: var(--bg-card);
  border-radius: var(--radius-sm);
  overflow: hidden;
}
table.t th, table.t td {
  border: 1px solid var(--border);
  padding: 8px 10px;
  text-align: left;
  vertical-align: top;
}
table.t th {
  background: var(--bg-card-2);
  color: var(--primary);
  font-weight: 600;
  white-space: nowrap;
}
table.t tr:nth-child(even) td { background: rgba(255,255,255,0.015); }

/* ========== 主页索引网格 ========== */
.grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin: 14px 0 6px;
}
@media (max-width: 480px) {
  .grid { grid-template-columns: 1fr; }
}
.tile {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 14px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  transition: transform 0.15s, border-color 0.15s, background 0.15s;
}
.tile:active { transform: scale(0.985); background: var(--bg-card-2); }
.tile-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.tile-title {
  color: var(--text);
  font-weight: 700;
  font-size: 15.5px;
}
.tile-badge {
  font-size: 11.5px;
  padding: 2px 8px;
  border-radius: 999px;
  font-weight: 600;
}
.tile-badge.must { background: var(--danger-soft); color: var(--danger); }
.tile-badge.high { background: var(--accent-soft); color: var(--accent); }
.tile-badge.mid { background: var(--primary-soft); color: var(--primary); }
.tile-badge.essay { background: var(--success-soft); color: var(--success); }
.tile-desc {
  font-size: 13.5px;
  color: var(--text-soft);
  line-height: 1.55;
}

/* ========== 代码与口诀块 ========== */
.mnemonic {
  background: linear-gradient(180deg, rgba(247,201,72,0.08), rgba(247,201,72,0.02));
  border: 1px dashed rgba(247,201,72,0.4);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  margin: 10px 0;
  font-size: 14.5px;
}
.mnemonic strong { color: var(--accent); }

pre.code {
  background: #0a0f1c;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px;
  overflow-x: auto;
  font-size: 13px;
  line-height: 1.6;
  color: #cbd5e1;
}

code.inline {
  background: var(--bg-card-2);
  border: 1px solid var(--border);
  padding: 1px 6px;
  border-radius: 4px;
  font-size: 13.5px;
  color: var(--primary);
}

/* ========== 折叠面板 ========== */
details.fold {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  margin: 10px 0;
  padding: 0 14px;
}
details.fold summary {
  list-style: none;
  cursor: pointer;
  padding: 12px 0;
  font-weight: 600;
  position: relative;
  user-select: none;
}
details.fold summary::-webkit-details-marker { display: none; }
details.fold summary::after {
  content: "+";
  position: absolute;
  right: 0;
  color: var(--primary);
  font-size: 18px;
}
details.fold[open] summary::after { content: "−"; }
details.fold .fold-body {
  padding: 0 0 12px;
  border-top: 1px solid var(--border);
  padding-top: 10px;
}

/* ========== 步骤 ========== */
.steps {
  counter-reset: step;
  padding: 0;
  margin: 10px 0;
  list-style: none;
}
.steps li {
  counter-increment: step;
  position: relative;
  padding: 8px 10px 8px 38px;
  margin: 8px 0;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 14.5px;
}
.steps li::before {
  content: counter(step);
  position: absolute;
  left: 10px;
  top: 50%;
  transform: translateY(-50%);
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--primary);
  color: #0a0f1c;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
}

/* ========== 章节锚点 ========== */
.anchor {
  display: inline-block;
  font-size: 12px;
  color: var(--text-mute);
  margin-left: 6px;
}

/* ========== 进度/计划表 ========== */
.day {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px;
  margin: 12px 0;
}
.day-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
  border-bottom: 1px dashed var(--border);
  padding-bottom: 8px;
}
.day-title { font-weight: 700; font-size: 16px; }
.day-tag { color: var(--accent); font-size: 13px; font-weight: 600; }
.day ul { padding-left: 18px; margin: 6px 0; }

/* ========== TOC 浮动按钮 ========== */
.toc-fab {
  position: fixed;
  right: 16px;
  bottom: 16px;
  background: var(--primary);
  color: #08111d;
  border-radius: 50%;
  width: 46px;
  height: 46px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  box-shadow: 0 6px 20px rgba(88, 166, 255, 0.5);
  cursor: pointer;
  font-size: 18px;
  border: none;
  z-index: 60;
}

.toc-panel {
  position: fixed;
  right: 16px;
  bottom: 70px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 12px 6px;
  width: 260px;
  max-height: 60vh;
  overflow: auto;
  box-shadow: var(--shadow);
  display: none;
  z-index: 60;
}
.toc-panel.show { display: block; }
.toc-panel a {
  display: block;
  padding: 6px 4px;
  font-size: 13.5px;
  border-bottom: 1px dashed var(--border);
}
.toc-panel a:last-child { border-bottom: none; }

/* ========== 底部 ========== */
.foot {
  text-align: center;
  color: var(--text-mute);
  font-size: 12.5px;
  margin: 30px 0 8px;
}

/* ========== 工具样式 ========== */
.kbd {
  background: var(--bg-card-2);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1px 6px;
  font-size: 12.5px;
  color: var(--accent);
}
.hl { color: var(--accent); font-weight: 600; }
.hl-blue { color: var(--primary); font-weight: 600; }
.hl-red { color: var(--danger); font-weight: 600; }
.hl-green { color: var(--success); font-weight: 600; }
.muted { color: var(--text-mute); }
.small { font-size: 13px; }
.center { text-align: center; }

/* ========== 双列 ========== */
.two-col {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}
@media (max-width: 560px) {
  .two-col { grid-template-columns: 1fr; }
}

/* iPhone 安全区 */
@supports (padding: max(0px)) {
  .container { padding-bottom: max(80px, env(safe-area-inset-bottom)); }
  .topbar-inner { padding-top: max(12px, env(safe-area-inset-top)); }
}