/* ============================================================
   PC硬件模拟器 - 样式表
   现代暗色游戏风格主题
   ============================================================ */

/* ---------- 基础重置 ---------- */
* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --bg-primary: #0a0e1a;
  --bg-secondary: #131826;
  --bg-card: #1a2033;
  --bg-card-hover: #232b42;
  --border-color: #2a3550;
  --text-primary: #e8eaf0;
  --text-secondary: #9ba3b5;
  --text-muted: #6b7388;
  --accent: #00d4ff;
  --accent-glow: rgba(0, 212, 255, 0.3);
  --accent-purple: #a855f7;
  --accent-red: #ff4466;
  --accent-green: #22c55e;
  --accent-orange: #f59e0b;
  --accent-yellow: #fbbf24;
  --danger: #ef4444;
  --warning: #f59e0b;
  --success: #22c55e;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 20px rgba(0, 212, 255, 0.15);
}

body {
  font-family: -apple-system, "Segoe UI", "Microsoft YaHei", sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
}

/* ---------- 滚动条 ---------- */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--bg-secondary); }
::-webkit-scrollbar-thumb { background: var(--border-color); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent); }

/* ---------- 导航栏 ---------- */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 14, 26, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
}

.nav-container {
  max-width: 1600px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  height: 64px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  user-select: none;
}

.logo-icon { font-size: 28px; }

.logo-text {
  font-size: 20px;
  font-weight: 700;
  background: linear-gradient(135deg, var(--accent), var(--accent-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nav-tabs { display: flex; gap: 4px; }

.nav-tab {
  background: none;
  border: none;
  color: var(--text-secondary);
  padding: 8px 18px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
  transition: all 0.2s;
  font-family: inherit;
}

.nav-tab:hover {
  background: var(--bg-card);
  color: var(--text-primary);
}

.nav-tab.active {
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.15), rgba(168, 85, 247, 0.15));
  color: var(--accent);
  border: 1px solid rgba(0, 212, 255, 0.3);
}

/* ---------- 主内容 ---------- */
.main-content {
  max-width: 1600px;
  margin: 0 auto;
  padding: 24px;
}

.tab-section { display: none; }
.tab-section.active { display: block; animation: fadeIn 0.3s; }

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ---------- 页面标题 ---------- */
.page-header { margin-bottom: 24px; }

.page-header h1 {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 8px;
}

.page-header p {
  color: var(--text-secondary);
  font-size: 14px;
}

/* ---------- 装机模拟器布局 ---------- */
.builder-layout {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: 20px;
  align-items: start;
}

/* ---------- 硬件选择区 ---------- */
.component-section {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  margin-bottom: 12px;
  overflow: hidden;
}

.component-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 20px;
  cursor: pointer;
  user-select: none;
  transition: background 0.2s;
}

.component-header:hover { background: var(--bg-card-hover); }

.component-icon { font-size: 22px; }

.component-name { font-size: 16px; font-weight: 600; flex: 1; }

.component-selected {
  font-size: 13px;
  color: var(--text-muted);
  max-width: 200px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.component-selected.has-value {
  color: var(--accent);
}

.toggle-arrow {
  color: var(--text-muted);
  font-size: 12px;
  transition: transform 0.2s;
}

.component-section.expanded .toggle-arrow { transform: rotate(180deg); }

.component-body {
  padding: 0 20px 20px;
  border-top: 1px solid var(--border-color);
}

.component-filters {
  display: flex;
  gap: 10px;
  padding: 16px 0 12px;
}

.component-filters select,
.component-filters input {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-family: inherit;
}

.component-filters select { min-width: 120px; }
.component-filters input { flex: 1; }

.component-filters select:focus,
.component-filters input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-glow);
}

/* 风扇数量选择 */
.fan-qty-control {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 4px 0;
}
.fan-qty-label { font-size: 13px; color: var(--text-secondary); }
.fan-qty-control select {
  padding: 5px 10px;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  background: var(--color-background-primary);
  font-size: 13px;
  cursor: pointer;
  color: var(--text-primary);
  min-width: 60px;
}

/* ---------- 硬件列表项 ---------- */
.component-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  max-height: 400px;
  overflow-y: auto;
}

.hw-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: var(--bg-secondary);
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s;
}

.hw-item:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-color);
}

.hw-item.selected {
  background: rgba(0, 212, 255, 0.08);
  border-color: var(--accent);
  box-shadow: var(--shadow-glow);
}

.hw-item-info { flex: 1; min-width: 0; }

.hw-item-name {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 2px;
}

.hw-item-spec {
  font-size: 12px;
  color: var(--text-secondary);
}

.hw-item-price {
  font-size: 14px;
  font-weight: 700;
  color: var(--accent);
  white-space: nowrap;
}

.hw-item-badge {
  font-size: 10px;
  padding: 2px 8px;
  border-radius: 4px;
  font-weight: 600;
  white-space: nowrap;
}

.badge-x3d {
  background: rgba(168, 85, 247, 0.2);
  color: var(--accent-purple);
}

.badge-hot {
  background: rgba(255, 68, 102, 0.2);
  color: var(--accent-red);
}

.badge-atx30,
.badge-atx31,
.badge-pcie5 {
  font-size: 10px;
  padding: 2px 6px;
  border-radius: 4px;
  font-weight: 600;
}

.badge-atx30 {
  background: rgba(59, 130, 246, 0.2);
  color: #60a5fa;
}

.badge-atx31 {
  background: rgba(16, 185, 129, 0.2);
  color: #34d399;
}

.badge-pcie5 {
  background: rgba(245, 158, 11, 0.2);
  color: #fbbf24;
}

.db-badge {
  display: inline-block;
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 4px;
  font-weight: 600;
  margin-right: 4px;
  white-space: nowrap;
}

.db-badge-atx30 { background: rgba(59, 130, 246, 0.15); color: #3b82f6; }
.db-badge-atx31 { background: rgba(16, 185, 129, 0.15); color: #10b981; }
.db-badge-pcie5 { background: rgba(245, 158, 11, 0.15); color: #f59e0b; }

/* ---------- 右侧摘要区 ---------- */
.builder-right {
  position: sticky;
  top: 88px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.summary-card,
.compat-card,
.power-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 20px;
}

.summary-card h3,
.compat-card h3,
.power-card h3 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 16px;
}

.summary-list { display: flex; flex-direction: column; gap: 8px; }

.summary-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 12px;
  background: var(--bg-secondary);
  border-radius: var(--radius-sm);
  font-size: 13px;
}

.summary-row .sr-label { color: var(--text-secondary); }
.summary-row .sr-value { font-weight: 600; max-width: 200px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.summary-empty {
  text-align: center;
  color: var(--text-muted);
  padding: 24px;
  font-size: 13px;
}

.summary-total {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--border-color);
  font-size: 16px;
}

.total-price {
  font-size: 22px;
  font-weight: 800;
  color: var(--accent);
}

.summary-actions {
  display: flex;
  gap: 8px;
  margin-top: 16px;
}

/* ---------- 按钮 ---------- */
.btn {
  padding: 10px 20px;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  font-family: inherit;
  flex: 1;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), #0099cc);
  color: #000;
}

.btn-primary:hover {
  box-shadow: 0 4px 16px var(--accent-glow);
  transform: translateY(-1px);
}

.btn-secondary {
  background: var(--bg-secondary);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background: var(--bg-card-hover);
  color: var(--text-primary);
}

.btn-large {
  padding: 16px 40px;
  font-size: 18px;
}

/* ---------- 兼容性检查 ---------- */
.compat-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  margin-bottom: 8px;
}

.compat-item.ok { background: rgba(34, 197, 94, 0.08); }
.compat-item.warn { background: rgba(245, 158, 11, 0.08); }
.compat-item.error { background: rgba(239, 68, 68, 0.08); }

.compat-icon { font-size: 16px; flex-shrink: 0; }
.compat-text { flex: 1; }
.compat-cat { color: var(--text-muted); font-size: 11px; margin-bottom: 2px; }

/* ---------- 功耗估算 ---------- */
.power-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
  font-size: 13px;
}

.power-bar-label { width: 50px; color: var(--text-secondary); }
.power-bar-track {
  flex: 1;
  height: 8px;
  background: var(--bg-secondary);
  border-radius: 4px;
  overflow: hidden;
}
.power-bar-fill { height: 100%; border-radius: 4px; transition: width 0.5s; }
.power-bar-value { width: 60px; text-align: right; font-weight: 600; }

/* ---------- 模拟结果 ---------- */
.sim-results {
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--border-color);
}

.results-title {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 20px;
}

.score-overview {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 32px;
  text-align: center;
  margin-bottom: 20px;
}

.score-circle {
  width: 180px;
  height: 180px;
  margin: 0 auto 20px;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.score-circle svg { width: 100%; height: 100%; transform: rotate(-90deg); }

.score-circle .score-bg { fill: none; stroke: var(--bg-secondary); stroke-width: 10; }
.score-circle .score-fg { fill: none; stroke-width: 10; stroke-linecap: round; transition: stroke-dasharray 1s; }

.score-value {
  position: absolute;
  font-size: 36px;
  font-weight: 800;
}

.score-tier {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 4px;
}

.score-subtitle { color: var(--text-secondary); font-size: 13px; }

/* ---------- 分项评分 ---------- */
.score-breakdown {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
  margin-bottom: 28px;
}

.score-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 20px;
  text-align: center;
}

.score-item-icon { font-size: 24px; margin-bottom: 8px; }
.score-item-label { font-size: 12px; color: var(--text-secondary); margin-bottom: 8px; }
.score-item-value { font-size: 22px; font-weight: 700; }
.score-item-name { font-size: 11px; color: var(--text-muted); margin-top: 6px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.score-item-bar {
  height: 4px;
  background: var(--bg-secondary);
  border-radius: 2px;
  margin-top: 10px;
  overflow: hidden;
}
.score-item-bar-fill { height: 100%; border-radius: 2px; transition: width 0.8s; }

/* ---------- 分辨率选择 ---------- */
.resolution-selector {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 20px;
  font-size: 14px;
  color: var(--text-secondary);
}

.res-btn {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  padding: 8px 20px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-family: inherit;
  font-size: 14px;
  transition: all 0.2s;
}

.res-btn:hover { border-color: var(--accent); color: var(--text-primary); }
.res-btn.active { background: var(--accent); color: #000; border-color: var(--accent); }

/* ---------- 游戏帧率结果 ---------- */
.game-results {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 16px;
}

.game-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 20px;
  transition: all 0.2s;
}

.game-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-glow);
}

.game-card-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.game-icon { font-size: 32px; }
.game-icon-img {
  width: 40px;
  height: 40px;
  object-fit: contain;
  border-radius: 6px;
  display: block;
}

.game-name { font-size: 16px; font-weight: 700; }
.game-type { font-size: 11px; color: var(--text-muted); }

.game-fps-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 0;
  border-bottom: 1px solid var(--border-color);
  font-size: 13px;
}

.game-fps-row:last-child { border-bottom: none; }

.fps-label { color: var(--text-secondary); }
.fps-value { font-weight: 700; font-size: 16px; }
.fps-avg { color: var(--accent); }
.fps-low { color: var(--accent-orange); }

.game-meta {
  display: flex;
  justify-content: space-between;
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--border-color);
  font-size: 11px;
  color: var(--text-muted);
}

.bottleneck-badge {
  padding: 2px 8px;
  border-radius: 4px;
  font-weight: 600;
}
.bn-cpu { background: rgba(255, 68, 102, 0.15); color: var(--accent-red); }
.bn-gpu { background: rgba(245, 158, 11, 0.15); color: var(--accent-orange); }
.bn-balanced { background: rgba(34, 197, 94, 0.15); color: var(--success); }

.temp-bar {
  display: inline-block;
  width: 60px;
  height: 6px;
  background: var(--bg-secondary);
  border-radius: 3px;
  margin-left: 6px;
  vertical-align: middle;
  overflow: hidden;
}
.temp-fill { height: 100%; border-radius: 3px; }

/* ---------- 硬件数据库 ---------- */
.database-layout { display: flex; flex-direction: column; gap: 16px; }

.db-controls {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.db-categories {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.db-cat {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-family: inherit;
  font-size: 14px;
  transition: all 0.2s;
}

.db-cat:hover { border-color: var(--accent); color: var(--text-primary); }
.db-cat.active { background: var(--accent); color: #000; border-color: var(--accent); }

.db-view-toggle {
  display: flex;
  gap: 4px;
}

.view-btn {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  padding: 8px 18px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-family: inherit;
  font-size: 13px;
  transition: all 0.2s;
}

.view-btn:hover { border-color: var(--accent); color: var(--text-primary); }
.view-btn.active { background: var(--accent-purple); color: #fff; border-color: var(--accent-purple); }

/* ---------- 高级筛选栏 ---------- */
.db-filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 14px 18px;
}

.db-filter-bar > input {
  flex: 1;
  min-width: 180px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-family: inherit;
}

.db-filter-bar > input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-glow);
}

.db-filter-group {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
}

.db-filter-group select {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-family: inherit;
  cursor: pointer;
}

.db-filter-group select:focus {
  outline: none;
  border-color: var(--accent);
}

.range-input {
  display: flex;
  align-items: center;
  gap: 6px;
}

.range-label {
  font-size: 12px;
  color: var(--text-muted);
  white-space: nowrap;
}

.range-sep {
  color: var(--text-muted);
  font-size: 12px;
}

.range-input input {
  width: 72px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 6px 8px;
  border-radius: var(--radius-sm);
  font-size: 12px;
  font-family: inherit;
}

.range-input input:focus {
  outline: none;
  border-color: var(--accent);
}

/* ---------- 排行榜 ---------- */
.db-ranking-container {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.ranking-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: start;
  gap: 24px;
}

.ranking-section {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  overflow: hidden;
}

.ranking-section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 20px;
  border-bottom: 2px solid var(--accent);
}

.ranking-section-title {
  font-size: 16px;
  font-weight: 700;
}

.ranking-section-count {
  font-size: 12px;
  color: var(--text-muted);
}

.ranking-empty {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-muted);
  font-size: 14px;
}

.ranking-table {
  max-height: 600px;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--border-color) transparent;
}

/* 让左右两列首个插槽分组高度一致，保证下方标题水平对齐 */
.ranking-section .ranking-socket-group:first-child .ranking-table {
  min-height: 580px;
}

/* 插槽分组 */
.ranking-socket-group {
  margin-bottom: 16px;
}
.ranking-socket-group:last-child { margin-bottom: 0; }

.ranking-socket-title {
  font-size: 13px;
  font-weight: 700;
  color: var(--accent);
  padding: 6px 12px;
  background: var(--bg-card);
  border-radius: 8px 8px 0 0;
  border: 1px solid var(--border-color);
  border-bottom: none;
}

.ranking-table::-webkit-scrollbar { width: 6px; }
.ranking-table::-webkit-scrollbar-track { background: transparent; }
.ranking-table::-webkit-scrollbar-thumb { background: var(--border-color); border-radius: 3px; }
.ranking-table::-webkit-scrollbar-thumb:hover { background: var(--accent); }

.ranking-header {
  display: grid;
  grid-template-columns: 36px 1.4fr 80px 110px 55px 80px 85px;
  padding: 10px 12px;
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border-color);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.ranking-row {
  display: grid;
  grid-template-columns: 36px 1.4fr 80px 110px 55px 80px 85px;
  padding: 10px 12px;
  font-size: 13px;
  border-bottom: 1px solid var(--border-color);
  align-items: center;
  transition: background 0.15s;
}

.ranking-row:hover { background: var(--bg-card-hover); }

.r-rank { font-weight: 700; text-align: center; }
.r-model { font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.r-cores { color: var(--text-secondary); text-align: center; }
.r-clock { color: var(--accent); font-weight: 600; text-align: center; font-size: 12px; }
.r-tdp { text-align: center; color: var(--text-secondary); }
.r-socket { text-align: center; color: var(--text-secondary); font-size: 11px; }
.r-price { text-align: right; font-weight: 700; color: var(--accent-green); }

.rank-gold { background: rgba(245, 158, 11, 0.06); }
.rank-gold .r-rank { color: #f59e0b; font-size: 15px; }
.rank-silver { background: rgba(156, 163, 175, 0.06); }
.rank-silver .r-rank { color: #9ca3af; font-size: 14px; }
.rank-bronze { background: rgba(180, 130, 70, 0.06); }
.rank-bronze .r-rank { color: #b48246; font-size: 14px; }

/* ---------- 数据表 ---------- */
.db-table-container {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  overflow: auto;
  max-height: 600px;
}

.db-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

.db-table thead {
  position: sticky;
  top: 0;
  background: var(--bg-card);
  z-index: 1;
}

.db-table th {
  padding: 14px 16px;
  text-align: left;
  font-weight: 600;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-color);
  white-space: nowrap;
}

.db-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-color);
  white-space: nowrap;
}

.db-table tr:hover { background: var(--bg-card-hover); }

.db-table .brand-cell { color: var(--accent); font-weight: 600; }

/* ---------- 超频教程 ---------- */
.overclock-layout { display: flex; flex-direction: column; gap: 20px; }

.oc-categories { display: flex; gap: 8px; }

.oc-cat {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  padding: 10px 24px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-family: inherit;
  font-size: 14px;
  transition: all 0.2s;
}

.oc-cat:hover { border-color: var(--accent); color: var(--text-primary); }
.oc-cat.active { background: var(--accent); color: #000; border-color: var(--accent); }

.oc-content {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 28px;
}

.oc-intro {
  color: var(--text-secondary);
  font-size: 14px;
  margin-bottom: 16px;
  line-height: 1.8;
}

.oc-warning {
  background: rgba(245, 158, 11, 0.08);
  border: 1px solid rgba(245, 158, 11, 0.3);
  border-radius: var(--radius-sm);
  padding: 14px 18px;
  font-size: 13px;
  color: var(--warning);
  margin-bottom: 24px;
  line-height: 1.6;
}

.oc-section { margin-bottom: 28px; }

.oc-section-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-color);
  color: var(--accent);
}

.oc-step {
  display: flex;
  gap: 16px;
  margin-bottom: 16px;
}

.oc-step-num {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--accent), var(--accent-purple));
  color: #000;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 14px;
}

.oc-step-content { flex: 1; }
.oc-step-title { font-size: 14px; font-weight: 600; margin-bottom: 4px; }
.oc-step-text { font-size: 13px; color: var(--text-secondary); line-height: 1.7; }

.oc-tips {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 16px;
}

.oc-tip {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 20px;
}

.oc-tip-icon { font-size: 24px; margin-bottom: 10px; }
.oc-tip-title { font-size: 14px; font-weight: 700; margin-bottom: 6px; }
.oc-tip-text { font-size: 13px; color: var(--text-secondary); line-height: 1.6; }

/* ---------- 底部 ---------- */
.footer {
  text-align: center;
  padding: 24px;
  color: var(--text-muted);
  font-size: 12px;
  border-top: 1px solid var(--border-color);
  margin-top: 40px;
}

/* ---------- 响应式 ---------- */
@media (max-width: 1200px) {
  .builder-layout { grid-template-columns: 1fr; }
  .builder-right { position: static; }
  .score-breakdown { grid-template-columns: repeat(3, 1fr); }
  .ranking-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .nav-container { flex-direction: column; height: auto; padding: 12px; gap: 10px; }
  .nav-tabs { flex-wrap: wrap; justify-content: center; }
  .main-content { padding: 12px; }
  .score-breakdown { grid-template-columns: repeat(2, 1fr); }
  .game-results { grid-template-columns: 1fr; }
  .page-header h1 { font-size: 22px; }
  .db-filter-bar { flex-direction: column; }
  .db-filter-group { width: 100%; }
  .ranking-header, .ranking-row { font-size: 10px; }
}