/* ===== 轻社区话题榜单站 - 全局样式 ===== */
:root {
  --color-primary: #6c5ce7;
  --color-primary-light: #a29bfe;
  --color-primary-dark: #4a3db8;
  --color-accent: #fd79a8;
  --color-accent-light: #fab1c4;
  --color-success: #00b894;
  --color-warning: #fdcb6e;
  --color-danger: #d63031;
  --color-bg: #0f0f1a;
  --color-bg-secondary: #1a1a2e;
  --color-bg-card: #16213e;
  --color-bg-card-hover: #1e2f50;
  --color-text: #e8e8f0;
  --color-text-secondary: #a0a0b8;
  --color-text-muted: #6c6c8a;
  --color-border: #2a2a4a;
  --color-border-light: #3a3a5a;
  --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;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-main);
  background-color: var(--color-bg);
  color: var(--color-text);
  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;
}

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

.section {
  padding: var(--spacing-3xl) 0;
}

.section-title {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: var(--spacing-lg);
  color: var(--color-text);
  position: relative;
  padding-left: var(--spacing-md);
}

.section-title::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 70%;
  background: linear-gradient(180deg, var(--color-primary), var(--color-accent));
  border-radius: 2px;
}

/* ===== 头部导航 ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(15, 15, 26, 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);
}

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

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

.nav-desktop a {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.nav-desktop a:hover,
.nav-desktop a.active {
  color: var(--color-text);
  background: rgba(108, 92, 231, 0.15);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all var(--transition-fast);
  text-decoration: none;
}

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

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-glow);
  color: #fff;
}

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

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

.btn-accent {
  background: linear-gradient(135deg, var(--color-accent), #e84393);
  color: #fff;
}

.btn-accent:hover {
  transform: translateY(-1px);
  color: #fff;
}

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

.menu-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: all var(--transition-fast);
}

.mobile-nav {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(15, 15, 26, 0.98);
  z-index: 9999;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-lg);
}

.mobile-nav.active {
  display: flex;
}

.mobile-nav a {
  font-size: 1.25rem;
  color: var(--color-text);
  padding: var(--spacing-sm) var(--spacing-xl);
}

.mobile-nav-close {
  position: absolute;
  top: var(--spacing-lg);
  right: var(--spacing-lg);
  font-size: 1.5rem;
  color: var(--color-text);
  cursor: pointer;
  background: none;
  border: none;
}

/* ===== 首屏英雄区 ===== */
.hero {
  padding: var(--spacing-3xl) 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::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 {
  0% { transform: scale(1) rotate(0deg); }
  100% { transform: scale(1.1) rotate(5deg); }
}

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

.hero h1 {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: var(--spacing-md);
  background: linear-gradient(135deg, var(--color-text), var(--color-primary-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.125rem;
  color: var(--color-text-secondary);
  max-width: 640px;
  margin: 0 auto var(--spacing-xl);
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

/* ===== 卡片系统 ===== */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--spacing-lg);
}

.card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.card:hover {
  background: var(--color-bg-card-hover);
  border-color: var(--color-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.card-badge {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}

.badge-hot {
  background: rgba(214, 48, 49, 0.2);
  color: var(--color-danger);
}

.badge-new {
  background: rgba(0, 184, 148, 0.2);
  color: var(--color-success);
}

.badge-top {
  background: rgba(253, 203, 110, 0.2);
  color: var(--color-warning);
}

.card-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--color-text);
}

.card-desc {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin-bottom: var(--spacing-md);
}

.card-meta {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

/* ===== 热度条 ===== */
.heat-bar {
  width: 100%;
  height: 6px;
  background: var(--color-border);
  border-radius: 3px;
  overflow: hidden;
  margin: var(--spacing-sm) 0;
}

.heat-bar-fill {
  height: 100%;
  border-radius: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  transition: width var(--transition-slow);
}

/* ===== 榜单列表 ===== */
.rank-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

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

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

.rank-num {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  font-size: 0.875rem;
  font-weight: 700;
  flex-shrink: 0;
}

.rank-num.top-1 {
  background: linear-gradient(135deg, #ffd700, #ffaa00);
  color: #1a1a2e;
}

.rank-num.top-2 {
  background: linear-gradient(135deg, #c0c0c0, #a0a0a0);
  color: #1a1a2e;
}

.rank-num.top-3 {
  background: linear-gradient(135deg, #cd7f32, #a0522d);
  color: #fff;
}

.rank-num.normal {
  background: var(--color-border);
  color: var(--color-text-secondary);
}

.rank-content {
  flex: 1;
  min-width: 0;
}

.rank-title {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.rank-stats {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-top: 2px;
}

/* ===== 任务卡片 ===== */
.task-card {
  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-fast);
}

.task-card:hover {
  border-color: var(--color-success);
}

.task-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: rgba(108, 92, 231, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  flex-shrink: 0;
}

.task-info {
  flex: 1;
}

.task-name {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-text);
}

.task-reward {
  font-size: 0.8rem;
  color: var(--color-success);
  margin-top: 2px;
}

.task-btn {
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
  background: rgba(0, 184, 148, 0.15);
  color: var(--color-success);
  border: 1px solid rgba(0, 184, 148, 0.3);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.task-btn:hover {
  background: var(--color-success);
  color: #fff;
}

/* ===== 会员权益 ===== */
.member-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: var(--spacing-lg);
}

.member-card {
  text-align: center;
  padding: var(--spacing-xl);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: all var(--transition-normal);
}

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

.member-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto var(--spacing-md);
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
}

.member-title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}

.member-desc {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* ===== 标签页切换 ===== */
.tabs {
  display: flex;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
  overflow-x: auto;
  padding-bottom: var(--spacing-sm);
}

.tab-btn {
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 500;
  border: 1px solid var(--color-border);
  background: transparent;
  color: var(--color-text-secondary);
  cursor: pointer;
  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;
}

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

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

.faq-item.active {
  border-color: var(--color-primary);
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-md) var(--spacing-lg);
  cursor: pointer;
  background: var(--color-bg-card);
  font-weight: 500;
  font-size: 0.95rem;
  transition: background var(--transition-fast);
}

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

.faq-arrow {
  transition: transform var(--transition-fast);
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.faq-item.active .faq-arrow {
  transform: rotate(180deg);
}

.faq-answer {
  padding: 0 var(--spacing-lg);
  max-height: 0;
  overflow: hidden;
  transition: all var(--transition-normal);
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  line-height: 1.8;
}

.faq-item.active .faq-answer {
  padding: var(--spacing-md) var(--spacing-lg);
  max-height: 500px;
}

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

.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: 500px;
  margin: 0 auto;
}

.search-input {
  width: 100%;
  padding: var(--spacing-md) var(--spacing-lg);
  padding-right: 50px;
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border);
  background: var(--color-bg-card);
  color: var(--color-text);
  font-size: 0.95rem;
  outline: none;
  transition: all var(--transition-fast);
}

.search-input:focus {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-glow);
}

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

.search-btn {
  position: absolute;
  right: 6px;
  top: 50%;
  transform: translateY(-50%);
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--color-primary);
  border: none;
  color: #fff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.search-btn:hover {
  background: var(--color-primary-dark);
}

.search-suggestions {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  right: 0;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  display: none;
  z-index: 100;
  box-shadow: var(--shadow-md);
}

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

.search-suggestion-item {
  padding: var(--spacing-sm) var(--spacing-md);
  cursor: pointer;
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  transition: background var(--transition-fast);
}

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

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

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

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

.footer-brand-name {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
  color: var(--color-text);
}

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

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

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

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

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

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

/* ===== 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;
  border: none;
  cursor: pointer;
  display: none;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  box-shadow: var(--shadow-md);
  z-index: 999;
  transition: all var(--transition-fast);
}

.back-to-top.visible {
  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: 50%;
  transform: translateX(-50%);
  background: var(--color-bg-card);
  border: 1px solid var(--color-primary);
  border-radius: var(--radius-lg);
  padding: var(--spacing-md) var(--spacing-lg);
  display: none;
  align-items: center;
  gap: var(--spacing-md);
  z-index: 998;
  box-shadow: var(--shadow-lg);
  max-width: 90%;
}

.pwa-prompt.visible {
  display: flex;
}

.pwa-prompt-text {
  font-size: 0.875rem;
  color: var(--color-text);
}

.pwa-prompt-close {
  background: none;
  border: none;
  color: var(--color-text-muted);
  cursor: pointer;
  font-size: 1.2rem;
}

/* ===== 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-sm) var(--spacing-lg);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 500;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
  z-index: 9999;
}

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

/* ===== 合规提醒条 ===== */
.compliance-bar {
  background: rgba(108, 92, 231, 0.08);
  border: 1px solid var(--color-border);
  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-md) var(--spacing-lg);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.search-result-item:hover {
  border-color: var(--color-primary);
}

.search-result-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-primary-light);
  margin-bottom: var(--spacing-xs);
}

.search-result-path {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-xs);
}

.search-result-desc {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

/* ===== 内页通用 ===== */
.page-header {
  padding: var(--spacing-2xl) 0 var(--spacing-lg);
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--spacing-xl);
}

.page-header h1 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
}

.page-header-desc {
  font-size: 1rem;
  color: var(--color-text-secondary);
  max-width: 700px;
  line-height: 1.7;
}

.page-content {
  min-height: 60vh;
}

.page-content p {
  margin-bottom: var(--spacing-md);
  line-height: 1.8;
  color: var(--color-text-secondary);
}

.page-content h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin: var(--spacing-xl) 0 var(--spacing-md);
  color: var(--color-text);
}

.page-content h3 {
  font-size: 1.2rem;
  font-weight: 600;
  margin: var(--spacing-lg) 0 var(--spacing-sm);
  color: var(--color-text);
}

.page-content ul,
.page-content ol {
  padding-left: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
}

.page-content li {
  margin-bottom: var(--spacing-sm);
  color: var(--color-text-secondary);
  line-height: 1.7;
  list-style: disc;
}

.page-content ol li {
  list-style: decimal;
}

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

.error-code {
  font-size: 6rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.error-title {
  font-size: 1.5rem;
  margin: var(--spacing-md) 0;
}

.error-desc {
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-xl);
}

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

/* ===== 响应式 ===== */
@media (max-width: 768px) {
  .nav-desktop {
    display: none;
  }

  .menu-toggle {
    display: flex;
  }

  .hero h1 {
    font-size: 1.75rem;
  }

  .hero-subtitle {
    font-size: 1rem;
  }

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

  .section-title {
    font-size: 1.4rem;
  }

  .card-grid {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

  .member-grid {
    grid-template-columns: 1fr;
  }

  .hero-actions {
    flex-direction: column;
  }

  .page-header h1 {
    font-size: 1.5rem;
  }

  .tabs {
    gap: var(--spacing-xs);
  }

  .tab-btn {
    padding: 6px 12px;
    font-size: 0.8rem;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--spacing-sm);
  }

  .hero h1 {
    font-size: 1.5rem;
  }

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

  .rank-item {
    padding: var(--spacing-sm) var(--spacing-md);
  }
}