/* ============================================
   麻豆tv综艺节目粉丝社区与互动平台 - 主样式表
   版本: 1.0.0
   描述: 采用CSS变量管理设计令牌，BEM命名规范
   ============================================ */

/* === 设计令牌（Design Tokens）=== */
:root {
  /* 色彩方案 */
  --primary: #FFD700;
  --secondary: #6B2FA0;
  --bg: #FFFFFF;
  --card-bg: #F8F0FF;
  --accent: #FF6F00;
  --text: #1A1A1A;
  --text-light: #666666;
  --border-color: #EAEAEA;

  /* 扩展色彩 */
  --primary-dark: #E6C200;
  --secondary-dark: #5A2788;
  --secondary-light: #8B4FC0;
  --success: #28A745;
  --danger: #DC3545;
  --warning: #FFC107;
  --gradient-primary: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  --gradient-secondary: linear-gradient(135deg, var(--secondary) 0%, var(--secondary-light) 100%);

  /* 字体 */
  --font-heading: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
  --font-body: 'Helvetica Neue', 'PingFang SC', 'Microsoft YaHei', Arial, sans-serif;
  --font-mono: 'Roboto', 'DIN Alternate', 'Courier New', monospace;

  /* 间距 */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;

  /* 圆角 */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 50%;

  /* 阴影 */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 12px 24px rgba(0, 0, 0, 0.12);
  --shadow-glow: 0 0 15px var(--primary);

  /* 过渡 */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;

  /* 布局 */
  --max-width: 1200px;
  --sidebar-width: 260px;
  --header-height: 64px;
}

/* === 全局重置 === */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.7;
  color: var(--text);
  background-color: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

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

a:hover {
  color: var(--secondary-dark);
}

ul, ol {
  list-style: none;
}

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
  font-size: inherit;
}

input, textarea, select {
  font-family: inherit;
  font-size: inherit;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: var(--space-sm) var(--space-md);
  outline: none;
  transition: border-color var(--transition-fast);
}

input:focus, textarea:focus, select:focus {
  border-color: var(--secondary);
  box-shadow: 0 0 0 3px rgba(107, 47, 160, 0.1);
}

/* === 工具类 === */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.text-center { text-align: center; }
.text-primary { color: var(--primary); }
.text-secondary { color: var(--secondary); }
.text-accent { color: var(--accent); }
.text-light { color: var(--text-light); }

/* === 按钮组件 === */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 10px 24px;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 14px;
  transition: all var(--transition-normal);
  white-space: nowrap;
}

.btn--primary {
  background: var(--primary);
  color: var(--text);
  box-shadow: 0 2px 8px rgba(255, 215, 0, 0.3);
}

.btn--primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(255, 215, 0, 0.4);
}

.btn--secondary {
  background: var(--secondary);
  color: #fff;
}

.btn--secondary:hover {
  background: var(--secondary-dark);
  transform: translateY(-2px);
}

.btn--outline {
  border: 2px solid var(--secondary);
  color: var(--secondary);
  background: transparent;
}

.btn--outline:hover {
  background: var(--secondary);
  color: #fff;
}

.btn--accent {
  background: var(--accent);
  color: #fff;
}

.btn--accent:hover {
  background: #E56300;
  transform: translateY(-2px);
}

.btn--sm {
  padding: 6px 14px;
  font-size: 12px;
}

.btn--lg {
  padding: 14px 32px;
  font-size: 16px;
}

/* === 顶部导航栏 === */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
  z-index: 1000;
  transition: background var(--transition-normal);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.header__logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.header__logo img {
  height: 36px;
  width: auto;
}

.header__logo-text {
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 900;
  color: var(--secondary);
}

.header__nav {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.header__nav-link {
  font-size: 15px;
  font-weight: 500;
  color: var(--text);
  padding: var(--space-sm) 0;
  position: relative;
  transition: color var(--transition-fast);
}

.header__nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 3px;
  background: var(--primary);
  border-radius: 2px;
  transition: width var(--transition-normal);
}

.header__nav-link:hover,
.header__nav-link--active {
  color: var(--secondary);
}

.header__nav-link:hover::after,
.header__nav-link--active::after {
  width: 100%;
}

.header__search {
  display: flex;
  align-items: center;
  background: var(--card-bg);
  border-radius: 20px;
  padding: 6px 16px;
  gap: var(--space-sm);
  width: 220px;
  transition: width var(--transition-normal);
}

.header__search:focus-within {
  width: 280px;
  border: 1px solid var(--secondary);
}

.header__search input {
  border: none;
  background: transparent;
  width: 100%;
  font-size: 13px;
  padding: 2px 0;
}

.header__search input:focus {
  box-shadow: none;
}

.header__actions {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.header__notification {
  position: relative;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  background: var(--card-bg);
  transition: background var(--transition-fast);
}

.header__notification:hover {
  background: var(--border-color);
}

.header__notification-badge {
  position: absolute;
  top: 2px;
  right: 2px;
  width: 8px;
  height: 8px;
  background: var(--accent);
  border-radius: var(--radius-full);
  border: 2px solid #fff;
}

.header__avatar {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  border: 2px solid var(--primary);
  object-fit: cover;
}

/* 汉堡菜单（移动端） */
.header__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
}

.header__hamburger span {
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: all var(--transition-normal);
}

/* === 主布局 === */
.main-layout {
  display: grid;
  grid-template-columns: var(--sidebar-width) 1fr var(--sidebar-width);
  gap: var(--space-lg);
  max-width: var(--max-width);
  margin: calc(var(--header-height) + var(--space-lg)) auto 0;
  padding: 0 var(--space-md);
  min-height: calc(100vh - var(--header-height));
}

.main-layout--full {
  grid-template-columns: 1fr;
}

.main-layout--with-sidebar {
  grid-template-columns: 1fr var(--sidebar-width);
}

/* === 左侧边栏 === */
.sidebar-left {
  position: sticky;
  top: calc(var(--header-height) + var(--space-lg));
  height: fit-content;
  max-height: calc(100vh - var(--header-height) - var(--space-2xl));
  overflow-y: auto;
}

.sidebar-left__nav {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.sidebar-left__item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 10px var(--space-md);
  border-radius: var(--radius-md);
  color: var(--text);
  font-size: 14px;
  transition: all var(--transition-fast);
}

.sidebar-left__item:hover,
.sidebar-left__item--active {
  background: var(--card-bg);
  color: var(--secondary);
}

.sidebar-left__item svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

/* === 右侧边栏 === */
.sidebar-right {
  position: sticky;
  top: calc(var(--header-height) + var(--space-lg));
  height: fit-content;
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

/* === 内容卡片 === */
.card {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  transition: all var(--transition-normal);
  border: 1px solid transparent;
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  border-color: var(--border-color);
}

.card__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-md);
}

.card__title {
  font-family: var(--font-heading);
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
}

.card__badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  border-radius: 10px;
  font-size: 11px;
  font-weight: 600;
}

.card__badge--hot {
  background: rgba(255, 111, 0, 0.1);
  color: var(--accent);
}

.card__badge--new {
  background: rgba(107, 47, 160, 0.1);
  color: var(--secondary);
}

/* === Hero Banner 轮播 === */
.hero-banner {
  position: relative;
  width: 100%;
  border-radius: var(--radius-xl);
  overflow: hidden;
  margin-bottom: var(--space-xl);
}

.hero-banner__slides {
  display: flex;
  transition: transform var(--transition-slow);
}

.hero-banner__slide {
  min-width: 100%;
  position: relative;
  aspect-ratio: 21/9;
}

.hero-banner__slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-banner__overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: var(--space-2xl) var(--space-xl);
  background: linear-gradient(to top, rgba(0,0,0,0.7) 0%, transparent 100%);
  color: #fff;
}

.hero-banner__title {
  font-family: var(--font-heading);
  font-size: 28px;
  font-weight: 900;
  margin-bottom: var(--space-sm);
  text-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

.hero-banner__desc {
  font-size: 15px;
  opacity: 0.9;
  margin-bottom: var(--space-md);
}

.hero-banner__indicators {
  position: absolute;
  bottom: var(--space-md);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: var(--space-sm);
}

.hero-banner__dot {
  width: 8px;
  height: 8px;
  border-radius: var(--radius-full);
  background: rgba(255,255,255,0.5);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.hero-banner__dot--active {
  width: 24px;
  background: var(--primary);
}

.hero-banner__arrows {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 100%;
  display: flex;
  justify-content: space-between;
  padding: 0 var(--space-md);
  pointer-events: none;
}

.hero-banner__arrow {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background: rgba(255,255,255,0.8);
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: all;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.hero-banner__arrow:hover {
  background: #fff;
  box-shadow: var(--shadow-md);
}

/* === 直播预告倒计时 === */
.countdown-section {
  margin-bottom: var(--space-xl);
}

.countdown-card {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  background: var(--gradient-secondary);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  color: #fff;
  position: relative;
  overflow: hidden;
}

.countdown-card::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 300px;
  height: 300px;
  background: rgba(255, 215, 0, 0.1);
  border-radius: var(--radius-full);
}

.countdown-card__info {
  flex: 1;
}

.countdown-card__label {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 1px;
  opacity: 0.8;
  margin-bottom: var(--space-xs);
}

.countdown-card__title {
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 700;
  margin-bottom: var(--space-sm);
}

.countdown-card__timer {
  display: flex;
  gap: var(--space-sm);
}

.countdown-card__unit {
  display: flex;
  flex-direction: column;
  align-items: center;
  background: rgba(255,255,255,0.15);
  border-radius: var(--radius-md);
  padding: var(--space-sm) var(--space-md);
  min-width: 50px;
}

.countdown-card__number {
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 700;
  line-height: 1;
}

.countdown-card__text {
  font-size: 10px;
  opacity: 0.7;
  margin-top: 2px;
}

.countdown-card__btn {
  background: var(--primary);
  color: var(--text);
  padding: 8px 20px;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 13px;
  transition: all var(--transition-fast);
}

.countdown-card__btn:hover {
  transform: scale(1.05);
  box-shadow: var(--shadow-glow);
}

/* 脉冲动画 - 正在直播 */
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.6; }
}

.live-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: var(--danger);
  color: #fff;
  padding: 3px 10px;
  border-radius: 10px;
  font-size: 11px;
  font-weight: 600;
  animation: pulse 2s infinite;
}

.live-badge::before {
  content: '';
  width: 6px;
  height: 6px;
  background: #fff;
  border-radius: var(--radius-full);
}

/* === 粉丝打榜排行 === */
.ranking-widget {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
}

.ranking-widget__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-md);
}

.ranking-widget__title {
  font-family: var(--font-heading);
  font-size: 16px;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.ranking-widget__tabs {
  display: flex;
  gap: var(--space-xs);
}

.ranking-widget__tab {
  padding: 4px 10px;
  border-radius: 12px;
  font-size: 12px;
  color: var(--text-light);
  transition: all var(--transition-fast);
}

.ranking-widget__tab--active {
  background: var(--secondary);
  color: #fff;
}

.ranking-widget__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.ranking-widget__item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm);
  border-radius: var(--radius-md);
  transition: background var(--transition-fast);
}

.ranking-widget__item:hover {
  background: rgba(107, 47, 160, 0.05);
}

.ranking-widget__item--top {
  background: rgba(255, 215, 0, 0.08);
  box-shadow: var(--shadow-glow);
}

.ranking-widget__rank {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  width: 24px;
  text-align: center;
  color: var(--text-light);
}

.ranking-widget__item--top .ranking-widget__rank {
  color: var(--primary);
}

.ranking-widget__avatar {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  object-fit: cover;
}

.ranking-widget__name {
  flex: 1;
  font-size: 13px;
  font-weight: 500;
}

.ranking-widget__votes {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--accent);
  font-weight: 600;
}

.ranking-widget__vote-btn {
  padding: 4px 10px;
  border-radius: 12px;
  background: var(--primary);
  color: var(--text);
  font-size: 11px;
  font-weight: 600;
  transition: all var(--transition-fast);
}

.ranking-widget__vote-btn:hover {
  transform: scale(1.05);
}

/* === 节目投票器 === */
.poll-widget {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
}

.poll-widget__question {
  font-family: var(--font-heading);
  font-size: 15px;
  font-weight: 700;
  margin-bottom: var(--space-md);
}

.poll-widget__options {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.poll-widget__option {
  position: relative;
  padding: 10px var(--space-md);
  border-radius: var(--radius-md);
  background: #fff;
  border: 1px solid var(--border-color);
  cursor: pointer;
  overflow: hidden;
  transition: all var(--transition-fast);
}

.poll-widget__option:hover {
  border-color: var(--secondary);
}

.poll-widget__option-bar {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  background: rgba(107, 47, 160, 0.08);
  border-radius: var(--radius-md);
  transition: width var(--transition-slow);
}

.poll-widget__option-text {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13px;
}

.poll-widget__option-percent {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--secondary);
}

/* === 信息流帖子卡片 === */
.post-card {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  border: 1px solid var(--border-color);
  transition: all var(--transition-normal);
  margin-bottom: var(--space-md);
}

.post-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.post-card__header {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
}

.post-card__avatar {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  object-fit: cover;
}

.post-card__user-info {
  flex: 1;
}

.post-card__username {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
}

.post-card__meta {
  font-size: 12px;
  color: var(--text-light);
}

.post-card__content {
  font-size: 14px;
  line-height: 1.7;
  margin-bottom: var(--space-md);
  color: var(--text);
}

.post-card__images {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.post-card__images img {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
}

.post-card__actions {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
  padding-top: var(--space-md);
  border-top: 1px solid var(--border-color);
}

.post-card__action {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: 13px;
  color: var(--text-light);
  cursor: pointer;
  transition: color var(--transition-fast);
}

.post-card__action:hover {
  color: var(--secondary);
}

.post-card__action--liked {
  color: var(--accent);
}

/* === 圈子卡片 === */
.circle-card {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  padding: var(--space-md);
  transition: all var(--transition-normal);
  border: 1px solid transparent;
}

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

.circle-card__avatar {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-lg);
  object-fit: cover;
  flex-shrink: 0;
}

.circle-card__info {
  flex: 1;
  min-width: 0;
}

.circle-card__name {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 2px;
}

.circle-card__stats {
  font-size: 12px;
  color: var(--text-light);
}

.circle-card__join-btn {
  padding: 6px 14px;
  border-radius: 14px;
  background: var(--secondary);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  transition: all var(--transition-fast);
  flex-shrink: 0;
}

.circle-card__join-btn:hover {
  background: var(--secondary-dark);
  transform: scale(1.05);
}

/* === 弹幕效果 === */
.danmaku-container {
  position: relative;
  width: 100%;
  height: 200px;
  overflow: hidden;
  background: rgba(0,0,0,0.02);
  border-radius: var(--radius-lg);
}

.danmaku-item {
  position: absolute;
  white-space: nowrap;
  font-size: 14px;
  color: var(--text);
  animation: danmaku-scroll 8s linear forwards;
  will-change: transform;
}

@keyframes danmaku-scroll {
  from { transform: translateX(100%); }
  to { transform: translateX(-100%); }
}

.danmaku-item--vip {
  color: var(--primary);
  font-weight: 600;
  text-shadow: 0 0 4px rgba(255, 215, 0, 0.5);
  border: 1px solid var(--primary);
  padding: 2px 8px;
  border-radius: 10px;
  background: rgba(255, 215, 0, 0.1);
}

/* === 表情包瀑布流 === */
.meme-grid {
  columns: 4;
  column-gap: var(--space-md);
}

.meme-grid__item {
  break-inside: avoid;
  margin-bottom: var(--space-md);
  border-radius: var(--radius-md);
  overflow: hidden;
  position: relative;
  cursor: pointer;
  transition: transform var(--transition-fast);
}

.meme-grid__item:hover {
  transform: scale(1.02);
}

.meme-grid__item img {
  width: 100%;
  display: block;
}

.meme-grid__overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: var(--space-sm);
  background: linear-gradient(to top, rgba(0,0,0,0.6), transparent);
  opacity: 0;
  transition: opacity var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-sm);
}

.meme-grid__item:hover .meme-grid__overlay {
  opacity: 1;
}

/* === 页脚 === */
.footer {
  background: var(--secondary);
  color: #fff;
  padding: var(--space-3xl) 0 var(--space-lg);
  margin-top: var(--space-3xl);
}

.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-xl);
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.footer__brand {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.footer__brand-name {
  font-family: var(--font-heading);
  font-size: 22px;
  font-weight: 900;
  color: var(--primary);
}

.footer__brand-desc {
  font-size: 13px;
  opacity: 0.8;
  line-height: 1.8;
}

.footer__section-title {
  font-size: 14px;
  font-weight: 700;
  margin-bottom: var(--space-md);
  color: var(--primary);
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.footer__link {
  font-size: 13px;
  color: rgba(255,255,255,0.7);
  transition: color var(--transition-fast);
}

.footer__link:hover {
  color: var(--primary);
}

.footer__bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  margin-top: var(--space-xl);
  padding-top: var(--space-lg);
  text-align: center;
  font-size: 12px;
  opacity: 0.6;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-md);
  padding-right: var(--space-md);
}

/* === 面包屑导航 === */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md) 0;
  font-size: 13px;
  color: var(--text-light);
}

.breadcrumb__item {
  color: var(--text-light);
}

.breadcrumb__item--active {
  color: var(--secondary);
  font-weight: 500;
}

.breadcrumb__separator {
  color: var(--border-color);
}

/* === 标签 === */
.tag {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: 12px;
  font-size: 12px;
  font-weight: 500;
  background: var(--card-bg);
  color: var(--secondary);
  transition: all var(--transition-fast);
}

.tag:hover {
  background: var(--secondary);
  color: #fff;
}

.tag--hot {
  background: rgba(255, 111, 0, 0.1);
  color: var(--accent);
}

/* === 骨架屏 === */
.skeleton {
  background: linear-gradient(90deg, var(--card-bg) 25%, #f0e8f8 50%, var(--card-bg) 75%);
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s infinite;
  border-radius: var(--radius-md);
}

@keyframes skeleton-loading {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

.skeleton--text {
  height: 14px;
  margin-bottom: var(--space-sm);
}

.skeleton--title {
  height: 20px;
  width: 60%;
  margin-bottom: var(--space-md);
}

.skeleton--avatar {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
}

.skeleton--image {
  width: 100%;
  aspect-ratio: 16/9;
}

/* === 弹窗 Modal === */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(5px);
  -webkit-backdrop-filter: blur(5px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

.modal-overlay--active {
  opacity: 1;
  visibility: visible;
}

.modal {
  background: #fff;
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  max-width: 480px;
  width: 90%;
  transform: scale(0.9);
  transition: transform var(--transition-normal);
}

.modal-overlay--active .modal {
  transform: scale(1);
}

.modal__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-lg);
}

.modal__title {
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 700;
}

.modal__close {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  background: var(--card-bg);
  font-size: 18px;
  transition: background var(--transition-fast);
}

.modal__close:hover {
  background: var(--border-color);
}

/* === 搜索页 === */
.search-results__header {
  padding: var(--space-lg) 0;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: var(--space-lg);
}

.search-results__keyword {
  font-family: var(--font-heading);
  font-size: 22px;
  font-weight: 700;
}

.search-results__count {
  font-size: 13px;
  color: var(--text-light);
  margin-top: var(--space-xs);
}

.search-results__tabs {
  display: flex;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
  border-bottom: 1px solid var(--border-color);
  padding-bottom: var(--space-sm);
}

.search-results__tab {
  padding: var(--space-sm) var(--space-md);
  font-size: 14px;
  color: var(--text-light);
  border-bottom: 2px solid transparent;
  transition: all var(--transition-fast);
}

.search-results__tab--active {
  color: var(--secondary);
  border-bottom-color: var(--secondary);
  font-weight: 600;
}

/* === 个人中心 === */
.profile-header {
  background: var(--gradient-secondary);
  border-radius: var(--radius-xl);
  padding: var(--space-2xl);
  color: #fff;
  display: flex;
  align-items: center;
  gap: var(--space-xl);
  margin-bottom: var(--space-xl);
}

.profile-header__avatar {
  width: 80px;
  height: 80px;
  border-radius: var(--radius-full);
  border: 3px solid var(--primary);
  object-fit: cover;
}

.profile-header__info {
  flex: 1;
}

.profile-header__name {
  font-family: var(--font-heading);
  font-size: 22px;
  font-weight: 700;
  margin-bottom: var(--space-xs);
}

.profile-header__bio {
  font-size: 13px;
  opacity: 0.8;
  margin-bottom: var(--space-sm);
}

.profile-header__stats {
  display: flex;
  gap: var(--space-lg);
}

.profile-header__stat {
  text-align: center;
}

.profile-header__stat-num {
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 700;
}

.profile-header__stat-label {
  font-size: 11px;
  opacity: 0.7;
}

/* === 视频播放页 === */
.player-container {
  position: relative;
  width: 100%;
  aspect-ratio: 16/9;
  background: #000;
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: var(--space-lg);
}

.player-container__video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.player-container__controls {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: var(--space-md);
  background: linear-gradient(to top, rgba(0,0,0,0.8), transparent);
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

/* === 热门话题 === */
.trending-topics {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.trending-topics__item {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  padding: 6px 12px;
  background: var(--card-bg);
  border-radius: 14px;
  font-size: 12px;
  color: var(--text);
  transition: all var(--transition-fast);
}

.trending-topics__item:hover {
  background: var(--secondary);
  color: #fff;
}

.trending-topics__item--hot::before {
  content: '🔥';
  font-size: 11px;
}

/* === 通知消息 === */
.notification-toast {
  position: fixed;
  top: calc(var(--header-height) + var(--space-md));
  right: var(--space-md);
  background: #fff;
  border-radius: var(--radius-lg);
  padding: var(--space-md) var(--space-lg);
  box-shadow: var(--shadow-xl);
  border-left: 4px solid var(--success);
  transform: translateX(120%);
  transition: transform var(--transition-normal);
  z-index: 3000;
}

.notification-toast--show {
  transform: translateX(0);
}

/* === 页面过渡 === */
.page-transition {
  animation: fadeIn 0.4s ease;
}

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

/* === 点赞动效 === */
@keyframes likeAnimation {
  0% { transform: scale(1); }
  25% { transform: scale(1.3); }
  50% { transform: scale(0.9); }
  100% { transform: scale(1); }
}

.like-animated {
  animation: likeAnimation 0.4s ease;
}

/* === 响应式设计 === */
@media (max-width: 1024px) {
  .main-layout {
    grid-template-columns: 1fr var(--sidebar-width);
  }

  .sidebar-left {
    display: none;
  }

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

  .meme-grid {
    columns: 3;
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: 56px;
  }

  .main-layout {
    grid-template-columns: 1fr;
    margin-top: calc(var(--header-height) + var(--space-md));
  }

  .sidebar-right {
    position: static;
    order: -1;
  }

  .header__nav {
    display: none;
  }

  .header__search {
    display: none;
  }

  .header__hamburger {
    display: flex;
  }

  .hero-banner__slide {
    aspect-ratio: 16/9;
  }

  .hero-banner__title {
    font-size: 20px;
  }

  .countdown-card {
    flex-direction: column;
    text-align: center;
  }

  .countdown-card__timer {
    justify-content: center;
  }

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

  .profile-header {
    flex-direction: column;
    text-align: center;
  }

  .profile-header__stats {
    justify-content: center;
  }

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

  .meme-grid {
    columns: 2;
  }

  .search-results__tabs {
    overflow-x: auto;
    flex-wrap: nowrap;
  }

  /* 移动端底部导航 */
  .mobile-nav {
    display: flex;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: #fff;
    border-top: 1px solid var(--border-color);
    z-index: 1000;
    padding: var(--space-sm) 0;
    padding-bottom: env(safe-area-inset-bottom);
  }

  .mobile-nav__item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    font-size: 10px;
    color: var(--text-light);
    padding: var(--space-xs) 0;
  }

  .mobile-nav__item--active {
    color: var(--secondary);
  }

  .mobile-nav__item svg {
    width: 22px;
    height: 22px;
  }

  body {
    padding-bottom: 70px;
  }
}

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

  .hero-banner__overlay {
    padding: var(--space-lg) var(--space-md);
  }

  .hero-banner__title {
    font-size: 16px;
  }

  .post-card__images {
    grid-template-columns: 1fr;
  }

  .meme-grid {
    columns: 2;
  }

  .countdown-card__unit {
    min-width: 40px;
    padding: var(--space-xs) var(--space-sm);
  }

  .countdown-card__number {
    font-size: 18px;
  }
}

/* === 打印样式 === */
@media print {
  .header, .footer, .sidebar-left, .sidebar-right, .mobile-nav {
    display: none;
  }

  .main-layout {
    grid-template-columns: 1fr;
    margin-top: 0;
  }

  body {
    padding-bottom: 0;
  }
}

/* === 暗色模式预留 === */
@media (prefers-color-scheme: dark) {
  /* 暗色模式变量可在此覆盖 */
}

/* === 无障碍 === */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

:focus-visible {
  outline: 2px solid var(--secondary);
  outline-offset: 2px;
}

/* === 移动端底部导航（默认隐藏） === */
.mobile-nav {
  display: none;
}