/* ========================================
   年度盘点与月度合集站 - 主样式表
   暗色高级感 · 时间归档风 · 移动端优先
   ======================================== */

:root {
  --color-primary: #6c5ce7;
  --color-primary-light: #a29bfe;
  --color-primary-dark: #4a3db8;
  --color-accent: #00cec9;
  --color-accent-light: #81ecec;
  --color-warning: #fdcb6e;
  --color-danger: #d63031;
  --color-success: #00b894;
  --color-bg-dark: #0a0a0f;
  --color-bg-card: #16161e;
  --color-bg-card-hover: #1e1e2a;
  --color-bg-section: #111118;
  --color-bg-input: #1a1a24;
  --color-text-primary: #f0f0f5;
  --color-text-secondary: #a0a0b8;
  --color-text-muted: #6c6c80;
  --color-border: #2a2a3a;
  --color-border-light: #3a3a4a;
  --color-timeline: #6c5ce7;
  --color-badge-year: #6c5ce7;
  --color-badge-month: #00cec9;
  --color-badge-week: #fdcb6e;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-xl: 24px;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 20px rgba(108, 92, 231, 0.3);
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
  --font-main: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-mono: "JetBrains Mono", "Fira Code", monospace;
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-2xl: 48px;
  --spacing-3xl: 64px;
  --max-width: 1200px;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-main);
  background-color: var(--color-bg-dark);
  color: var(--color-text-primary);
  line-height: 1.7;
  min-height: 100vh;
  overflow-x: hidden;
}

a {
  color: var(--color-primary-light);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-accent);
}

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

ul, ol {
  list-style: none;
}

/* 容器 */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* ========== 头部导航 ========== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(10, 10, 15, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  padding: var(--spacing-md) 0;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-md);
}

.site-logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text-primary);
}

.site-logo img {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
}

/* 桌面导航 */
.nav-desktop {
  display: none;
}

.nav-desktop ul {
  display: flex;
  gap: var(--spacing-lg);
}

.nav-desktop a {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  padding: var(--spacing-xs) 0;
  position: relative;
}

.nav-desktop a::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: width var(--transition-normal);
}

.nav-desktop a:hover::after,
.nav-desktop a.active::after {
  width: 100%;
}

.nav-desktop a:hover,
.nav-desktop a.active {
  color: var(--color-text-primary);
}

/* 移动端菜单按钮 */
.menu-toggle {
  display: flex;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: var(--spacing-sm);
  background: none;
  border: none;
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text-primary);
  transition: transform var(--transition-normal), opacity var(--transition-fast);
}

.menu-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* 移动端导航面板 */
.nav-mobile {
  display: none;
  position: fixed;
  top: 65px;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(10, 10, 15, 0.98);
  padding: var(--spacing-xl);
  z-index: 999;
  overflow-y: auto;
}

.nav-mobile.open {
  display: block;
  animation: slideDown 0.3s ease;
}

.nav-mobile ul {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.nav-mobile a {
  display: block;
  color: var(--color-text-secondary);
  font-size: 1.1rem;
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  transition: background var(--transition-fast), color var(--transition-fast);
}

.nav-mobile a:hover,
.nav-mobile a.active {
  background: var(--color-bg-card);
  color: var(--color-text-primary);
}

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

/* ========== 首屏英雄区 ========== */
.hero-section {
  padding: var(--spacing-3xl) 0;
  text-align: center;
  background: linear-gradient(180deg, var(--color-bg-dark) 0%, var(--color-bg-section) 100%);
  position: relative;
  overflow: hidden;
}

.hero-section::before {
  content: "";
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(ellipse at center, rgba(108, 92, 231, 0.08) 0%, transparent 60%);
  animation: heroGlow 8s ease-in-out infinite alternate;
}

@keyframes heroGlow {
  from { transform: scale(1); opacity: 0.5; }
  to { transform: scale(1.1); opacity: 1; }
}

.hero-content {
  position: relative;
  z-index: 1;
}

.hero-title {
  font-size: 2.2rem;
  font-weight: 800;
  margin-bottom: var(--spacing-md);
  background: linear-gradient(135deg, var(--color-text-primary), var(--color-primary-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.1rem;
  color: var(--color-text-secondary);
  max-width: 680px;
  margin: 0 auto var(--spacing-xl);
  line-height: 1.8;
}

.hero-badges {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-xl);
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
}

.badge-year {
  background: rgba(108, 92, 231, 0.2);
  color: var(--color-primary-light);
  border: 1px solid rgba(108, 92, 231, 0.3);
}

.badge-month {
  background: rgba(0, 206, 201, 0.2);
  color: var(--color-accent-light);
  border: 1px solid rgba(0, 206, 201, 0.3);
}

.badge-week {
  background: rgba(253, 203, 110, 0.2);
  color: var(--color-warning);
  border: 1px solid rgba(253, 203, 110, 0.3);
}

/* CTA 按钮 */
.cta-group {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--spacing-md);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-xl);
  border-radius: var(--radius-lg);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all var(--transition-normal);
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: #fff;
  box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 30px rgba(108, 92, 231, 0.5);
  color: #fff;
}

.btn-outline {
  background: transparent;
  color: var(--color-text-primary);
  border: 1px solid var(--color-border-light);
}

.btn-outline:hover {
  background: var(--color-bg-card);
  border-color: var(--color-primary);
  color: var(--color-primary-light);
}

/* ========== 通用区块 ========== */
.section {
  padding: var(--spacing-3xl) 0;
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-2xl);
}

.section-title {
  font-size: 1.6rem;
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
}

.section-desc {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
  max-width: 600px;
  margin: 0 auto;
}

/* ========== 时间线 ========== */
.timeline {
  position: relative;
  padding-left: var(--spacing-xl);
}

.timeline::before {
  content: "";
  position: absolute;
  left: 12px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--color-primary), var(--color-accent), var(--color-warning));
}

.timeline-item {
  position: relative;
  margin-bottom: var(--spacing-xl);
  padding: var(--spacing-lg);
  background: var(--color-bg-card);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  transition: all var(--transition-normal);
}

.timeline-item:hover {
  background: var(--color-bg-card-hover);
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: -24px;
  top: 24px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--color-primary);
  border: 2px solid var(--color-bg-dark);
}

.timeline-date {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-primary-light);
  background: rgba(108, 92, 231, 0.15);
  padding: 2px 10px;
  border-radius: 10px;
  margin-bottom: var(--spacing-sm);
}

.timeline-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
}

.timeline-desc {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
}

/* ========== 卡片网格 ========== */
.card-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-lg);
}

.card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all var(--transition-normal);
}

.card:hover {
  transform: translateY(-4px);
  border-color: var(--color-primary);
  box-shadow: var(--shadow-lg);
}

.card-img {
  width: 100%;
  height: 180px;
  object-fit: cover;
}

.card-body {
  padding: var(--spacing-lg);
}

.card-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 4px;
  margin-bottom: var(--spacing-sm);
}

.card-tag-year {
  background: rgba(108, 92, 231, 0.2);
  color: var(--color-primary-light);
}

.card-tag-month {
  background: rgba(0, 206, 201, 0.2);
  color: var(--color-accent-light);
}

.card-tag-week {
  background: rgba(253, 203, 110, 0.2);
  color: var(--color-warning);
}

.card-title {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}

.card-excerpt {
  color: var(--color-text-secondary);
  font-size: 0.88rem;
  line-height: 1.6;
  margin-bottom: var(--spacing-md);
}

.card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.card-link {
  color: var(--color-primary-light);
  font-weight: 500;
}

/* ========== 周榜列表 ========== */
.rank-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.rank-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md) var(--spacing-lg);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: all var(--transition-normal);
}

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

.rank-number {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--color-text-muted);
  min-width: 36px;
  text-align: center;
}

.rank-item:nth-child(1) .rank-number { color: var(--color-warning); }
.rank-item:nth-child(2) .rank-number { color: var(--color-text-secondary); }
.rank-item:nth-child(3) .rank-number { color: var(--color-accent); }

.rank-info {
  flex: 1;
}

.rank-title {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 2px;
}

.rank-meta {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.rank-heat {
  font-size: 0.8rem;
  color: var(--color-danger);
  font-weight: 600;
}

/* ========== 日历网格 ========== */
.calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 4px;
}

.calendar-header {
  text-align: center;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-text-muted);
  padding: var(--spacing-sm);
}

.calendar-day {
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  border-radius: var(--radius-sm);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  transition: all var(--transition-fast);
  cursor: pointer;
}

.calendar-day:hover {
  border-color: var(--color-primary);
  background: var(--color-bg-card-hover);
}

.calendar-day.has-event {
  background: rgba(108, 92, 231, 0.2);
  border-color: var(--color-primary);
  color: var(--color-primary-light);
  font-weight: 600;
}

.calendar-day.today {
  background: var(--color-primary);
  color: #fff;
  font-weight: 700;
}

/* ========== FAQ ========== */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

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

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-lg);
  cursor: pointer;
  font-weight: 600;
  font-size: 0.95rem;
  transition: background var(--transition-fast);
}

.faq-question:hover {
  background: var(--color-bg-card-hover);
}

.faq-icon {
  font-size: 1.2rem;
  transition: transform var(--transition-normal);
  color: var(--color-primary-light);
}

.faq-item.open .faq-icon {
  transform: rotate(45deg);
}

.faq-answer {
  display: none;
  padding: 0 var(--spacing-lg) var(--spacing-lg);
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  line-height: 1.8;
}

.faq-item.open .faq-answer {
  display: block;
}

/* ========== 面包屑 ========== */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) 0;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.breadcrumb a {
  color: var(--color-text-secondary);
}

.breadcrumb a:hover {
  color: var(--color-primary-light);
}

.breadcrumb-sep {
  color: var(--color-text-muted);
}

/* ========== 搜索框 ========== */
.search-box {
  position: relative;
  max-width: 600px;
  margin: 0 auto;
}

.search-input {
  width: 100%;
  padding: var(--spacing-md) var(--spacing-xl);
  padding-right: 50px;
  background: var(--color-bg-input);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  color: var(--color-text-primary);
  font-size: 1rem;
  font-family: var(--font-main);
  outline: none;
  transition: border-color var(--transition-fast);
}

.search-input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(108, 92, 231, 0.15);
}

.search-input::placeholder {
  color: var(--color-text-muted);
}

.search-btn {
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  background: var(--color-primary);
  border: none;
  border-radius: var(--radius-md);
  padding: 8px 14px;
  color: #fff;
  cursor: pointer;
  font-size: 0.9rem;
}

.search-suggestions {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-top: 4px;
  display: none;
  z-index: 100;
  box-shadow: var(--shadow-lg);
}

.search-suggestions.show {
  display: block;
}

.search-suggestion-item {
  padding: var(--spacing-md) var(--spacing-lg);
  cursor: pointer;
  font-size: 0.9rem;
  border-bottom: 1px solid var(--color-border);
  transition: background var(--transition-fast);
}

.search-suggestion-item:last-child {
  border-bottom: none;
}

.search-suggestion-item:hover {
  background: var(--color-bg-card-hover);
}

/* ========== 页脚 ========== */
.site-footer {
  background: var(--color-bg-section);
  border-top: 1px solid var(--color-border);
  padding: var(--spacing-3xl) 0 var(--spacing-xl);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-2xl);
}

.footer-brand {
  max-width: 300px;
}

.footer-brand-name {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
}

.footer-brand-desc {
  color: var(--color-text-secondary);
  font-size: 0.85rem;
  line-height: 1.7;
}

.footer-nav-title {
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  color: var(--color-text-primary);
}

.footer-nav ul {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.footer-nav a {
  color: var(--color-text-secondary);
  font-size: 0.85rem;
}

.footer-nav a:hover {
  color: var(--color-primary-light);
}

.footer-bottom {
  border-top: 1px solid var(--color-border);
  padding-top: var(--spacing-lg);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: var(--spacing-md);
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.footer-links a {
  color: var(--color-text-muted);
  font-size: 0.8rem;
}

/* ========== 返回顶部 ========== */
.back-to-top {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  display: none;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  cursor: pointer;
  border: none;
  box-shadow: var(--shadow-md);
  z-index: 900;
  transition: all var(--transition-normal);
}

.back-to-top.show {
  display: flex;
}

.back-to-top:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-glow);
}

/* ========== PWA 安装提示 ========== */
.pwa-prompt {
  position: fixed;
  bottom: 80px;
  left: 16px;
  right: 16px;
  max-width: 400px;
  margin: 0 auto;
  background: var(--color-bg-card);
  border: 1px solid var(--color-primary);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  display: none;
  z-index: 950;
  box-shadow: var(--shadow-lg);
}

.pwa-prompt.show {
  display: block;
  animation: slideUp 0.3s ease;
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.pwa-prompt-title {
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}

.pwa-prompt-desc {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-md);
}

.pwa-prompt-actions {
  display: flex;
  gap: var(--spacing-sm);
}

.pwa-prompt-actions .btn {
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: 0.85rem;
}

/* ========== 表单提示 ========== */
.toast {
  position: fixed;
  top: 80px;
  left: 50%;
  transform: translateX(-50%) translateY(-20px);
  background: var(--color-success);
  color: #fff;
  padding: var(--spacing-md) var(--spacing-xl);
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: 500;
  opacity: 0;
  pointer-events: none;
  transition: all var(--transition-normal);
  z-index: 2000;
}

.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ========== 榜单切换标签 ========== */
.tab-nav {
  display: flex;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-xl);
  overflow-x: auto;
  padding-bottom: var(--spacing-sm);
}

.tab-btn {
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--radius-lg);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid var(--color-border);
  background: var(--color-bg-card);
  color: var(--color-text-secondary);
  white-space: nowrap;
  transition: all var(--transition-fast);
}

.tab-btn.active,
.tab-btn:hover {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

/* ========== 内页通用 ========== */
.page-hero {
  padding: var(--spacing-2xl) 0;
  background: var(--color-bg-section);
  border-bottom: 1px solid var(--color-border);
}

.page-title {
  font-size: 1.8rem;
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
}

.page-desc {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
  max-width: 700px;
  line-height: 1.8;
}

.page-content {
  padding: var(--spacing-2xl) 0;
}

/* ========== 合规提醒条 ========== */
.compliance-bar {
  background: rgba(108, 92, 231, 0.1);
  border: 1px solid rgba(108, 92, 231, 0.2);
  border-radius: var(--radius-md);
  padding: var(--spacing-md) var(--spacing-lg);
  margin-top: var(--spacing-xl);
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.compliance-bar a {
  color: var(--color-primary-light);
  text-decoration: underline;
}

/* ========== 搜索结果 ========== */
.search-results {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.search-result-item {
  padding: var(--spacing-lg);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.search-result-title {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
}

.search-result-path {
  font-size: 0.8rem;
  color: var(--color-accent);
  margin-bottom: var(--spacing-sm);
}

.search-result-excerpt {
  font-size: 0.88rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* ========== 404 页面 ========== */
.error-page {
  text-align: center;
  padding: var(--spacing-3xl) 0;
}

.error-code {
  font-size: 6rem;
  font-weight: 900;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.error-message {
  font-size: 1.2rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-xl);
}

.error-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--spacing-md);
}

/* ========== 表单 ========== */
.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-label {
  display: block;
  font-size: 0.9rem;
  font-weight: 500;
  margin-bottom: var(--spacing-sm);
  color: var(--color-text-secondary);
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: var(--spacing-md);
  background: var(--color-bg-input);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-primary);
  font-size: 0.95rem;
  font-family: var(--font-main);
  outline: none;
  transition: border-color var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(108, 92, 231, 0.15);
}

.form-textarea {
  min-height: 120px;
  resize: vertical;
}

/* ========== 响应式断点 ========== */
@media (min-width: 768px) {
  .hero-title {
    font-size: 3rem;
  }

  .hero-subtitle {
    font-size: 1.2rem;
  }

  .nav-desktop {
    display: block;
  }

  .menu-toggle {
    display: none;
  }

  .card-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr 1fr;
  }

  .calendar-grid {
    gap: 6px;
  }

  .section-title {
    font-size: 1.8rem;
  }
}

@media (min-width: 1024px) {
  .card-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .hero-title {
    font-size: 3.5rem;
  }

  .page-title {
    font-size: 2.2rem;
  }
}

/* ========== 工具类 ========== */
.text-center { text-align: center; }
.text-muted { color: var(--color-text-muted); }
.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }
.hidden { display: none; }