:root {
  --bg: #f8f9fa;
  --card: #ffffff;
  --muted: #6c757d;
  --text: #212529;
  --text-secondary: #495057;
  --accent: #dc3545;
  --accent-2: #28a745;
  --border: #dee2e6;
  --shadow: 0 2px 15px rgba(0, 0, 0, 0.08);
  --shadow-hover: 0 5px 25px rgba(0, 0, 0, 0.15);
  --transition: all 0.3s ease;
  --sidebar-width: 240px;
  --ad-width: 200px;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", "PingFang TC", "Microsoft JhengHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  overflow-x: hidden;
  line-height: 1.6;
}

.visually-hidden {
  position: absolute !important;
  height: 1px; width: 1px;
  overflow: hidden;
  clip: rect(1px, 1px, 1px, 1px);
  white-space: nowrap;
}

.layout-container {
  display: grid;
  grid-template-columns: 1fr;
  grid-template-rows: auto 1fr auto;
  min-height: 100vh;
  gap: 0;
  background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
}

/* 平板和PC屏幕 */
@media (min-width: 1024px) {
  .layout-container {
    grid-template-columns: var(--ad-width) 1fr var(--ad-width);
  }
}

.main-content {
  grid-column: 1;
  min-width: 0; /* Allow flex shrink */
}

/* 平板和PC屏幕 */
@media (min-width: 1024px) {
  .main-content {
    grid-column: 2;
  }
}

.top-nav {
  grid-column: 1 / -1;
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--card);
  border-bottom: 2px solid var(--accent);
  padding: 12px 0;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  transition: all 0.3s ease;
}

.top-nav:hover {
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15);
}

/* 简化顶部导航栏容器，只包含logo */
.top-nav .nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  box-sizing: border-box;
}

.nav-toggle, .home-link {
  display: none;
  background: none;
  border: none;
  color: var(--text);
  font-size: 24px;
  cursor: pointer;
  padding: 8px;
  border-radius: 4px;
  transition: background 0.2s ease;
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  text-decoration: none;
}

.home-link:hover {
  background: rgba(255, 255, 255, 0.1);
}

.nav-toggle:hover {
  background: rgba(255, 255, 255, 0.1);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
  max-width: 1400px;
  margin: 0 auto;
  width: 100%;
  flex-wrap: nowrap;
}

.logo-link {
  text-decoration: none;
  color: inherit;
  display: inline-block;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 20px;
}

.logo-emoji {
  font-size: 24px;
}

.logo-text {
  letter-spacing: .5px;
}

.main-nav {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
  padding-bottom: 5px;
  flex-shrink: 0;
  min-width: 0;
}

.nav-item {
  padding: 10px 20px;
  text-decoration: none;
  color: var(--text-secondary);
  border-radius: 25px;
  transition: var(--transition);
  font-size: 14px;
  font-weight: 500;
  white-space: nowrap;
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid transparent;
  position: relative;
  overflow: hidden;
}

.nav-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(220, 53, 69, 0.1), transparent);
  transition: all 0.5s ease;
}

.nav-item:hover::before {
  left: 100%;
}

.nav-item:hover {
  background: white;
  color: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(220, 53, 69, 0.2);
  border-color: var(--accent);
}

.nav-item.active {
  background: var(--accent);
  color: white;
  box-shadow: 0 4px 12px rgba(220, 53, 69, 0.3);
  border-color: var(--accent);
}

.nav-item.active:hover {
  background: #c82333;
  border-color: #c82333;
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(220, 53, 69, 0.4);
}

.nav-controls {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* Mobile navigation controls */
@media (max-width: 768px) {
  .nav-controls {
    width: 100%;
    justify-content: space-between;
    margin-top: 10px;
    gap: 8px;
  }
  
  .nav-controls .date-tabs {
    flex: 1;
    min-width: 0;
  }
  
  .nav-controls .date-tabs button {
    flex-shrink: 0;
  }
}

@media (max-width: 480px) {
  .nav-controls {
    flex-direction: column;
    gap: 6px;
  }
  
  .nav-controls .date-tabs {
    width: 100%;
    justify-content: flex-start;
  }
}

.main-content {
  background: var(--bg);
}

.content-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px 20px;
  width: 100%; /* 确保内容容器占满可用宽度 */
  box-sizing: border-box; /* 确保内边距不影响总宽度 */
}

/* 内容区域导航容器 */
.content-nav-container {
  margin-bottom: 20px;
  background: var(--card);
  border-radius: 12px;
  padding: 12px;
  border: 1px solid var(--border);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

/* 调整内容区域导航菜单样式 */
.content-nav-container .main-nav {
  max-width: 100%;
  overflow-x: auto;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
  padding-bottom: 5px;
}

/* 移动端优化 */
@media (max-width: 768px) {
  .content-nav-container {
    padding: 8px 12px;
    margin-bottom: 12px;
  }
  
  .content-nav-container .main-nav {
    max-width: 100%;
  }
}
.brand { display: flex; align-items: center; gap: 10px; }
.logo { font-size: 20px; }
.title { font-weight: 700; letter-spacing: .2px; }

.actions { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.search input {
  width: clamp(200px, 28vw, 420px);
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
}
.filters { display: flex; align-items: center; gap: 8px; }
.filters select, .filters label {
  font-size: 14px;
}
.filters select {
  padding: 8px 10px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
}
.tz-switch { display: flex; gap: 12px; }
.tz-switch input { accent-color: var(--accent); }

.left-ads, .right-ads {
  background: var(--card);
  border: 1px solid var(--border);
  padding: 20px;
  width: var(--ad-width);
}

.right-ads {
  grid-column: 3;
}

.left-ads {
  grid-column: 1;
}

.ad-placeholder {
  background: #2a2f3a;
  border-radius: 8px;
  padding: 16px;
  margin-bottom: 20px;
  text-align: center;
  color: var(--muted);
}

.ad-placeholder h3 {
  margin: 0 0 10px 0;
  font-size: 16px;
  color: var(--text);
}

.ad-placeholder p {
  margin: 0;
  font-size: 14px;
}

.live-section {
  padding: 20px;
  background: rgba(59, 130, 246, 0.05);
  border-bottom: 1px solid var(--border);
  margin-bottom: 20px;
  border-radius: 12px;
}

.live-title {
  font-size: 20px;
  margin: 0 0 16px 0;
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--accent);
}

.live-count {
  background: var(--accent);
  color: white;
  border-radius: 12px;
  padding: 4px 10px;
  font-size: 14px;
  font-weight: bold;
}

.live-events {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 8px;
}

.no-live-events {
  grid-column: 1 / -1;
  text-align: center;
  padding: 20px;
  color: var(--muted);
  font-style: italic;
}

.live-events {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 0;
}

.live-events .event-card {
  margin-top: 0;
}

.date-tabs {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: max-content;
  gap: 8px;
  padding: 12px 0;
  overflow-x: auto;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
  justify-content: center;
  margin-bottom: 20px;
}
.date-tabs button {
  appearance: none; border: none; cursor: pointer;
  padding: 8px 16px; border-radius: 999px;
  background: var(--card); color: var(--text);
  transition: background .2s ease, color .2s ease;
  scroll-snap-align: start;
  border: 1px solid var(--border);
}
.date-tabs button.active { background: var(--accent); color: #fff; border-color: var(--accent); }

.events { 
  padding: 0;
  margin: 0 auto; 
  width: 100%; /* 确保赛事列表占满可用宽度 */
  max-width: 100%; /* 防止在小屏幕上超出容器 */
  box-sizing: border-box; /* 确保内边距不影响总宽度 */
}
.day-group { margin-bottom: 30px; }
.day-group .day-title { font-weight: 600; margin: 15px 0 18px; color: var(--muted); font-size: 18px; }

.event-card {
  display: grid;
  grid-template-columns: 90px 1fr 240px;
  align-items: center;
  gap: 12px;
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--card);
  transition: all 0.3s ease;
  cursor: pointer;
}
.event-card + .event-card { margin-top: 12px; }

.event-card:hover { background: #f0f2f5; border-color: var(--accent); box-shadow: 0 6px 16px rgba(220, 53, 69, 0.15); transform: translateY(-2px); }

.event-card:active {
  transform: scale(0.98);
  transition: transform 0.1s ease;
}

/* Mobile event card layout */
@media (max-width: 768px) {
  .event-card {
    grid-template-columns: 1fr;
    gap: 8px;
    padding: 12px;
  }
  
  .event-card .time {
    order: 1;
    font-weight: 600;
    margin-bottom: 4px;
  }
  
  .event-card .match {
    order: 2;
  }
  
  .event-card .right {
    order: 3;
    justify-content: flex-start;
    gap: 6px;
  }
}

/* 广告位默认隐藏，只在PC屏幕上显示 */
.left-ads, .right-ads {
  display: none;
}

/* 移动设备上的布局优化 */
@media (max-width: 768px) {
  /* 隐藏导航切换按钮 */
  .nav-toggle {
    display: none;
  }
  
  /* 返回首页链接仅在特定页面显示 */
  .home-link {
    display: none;
  }
  
  /* 优化顶部导航容器布局 */
  .top-nav .nav-container {
    flex-direction: row;
    align-items: center;
    padding: 10px 20px;
    width: 100%;
    box-sizing: border-box;
  }
  
  /* 限制顶部Logo宽度 */
  .top-nav .nav-container .logo-link {
    flex-shrink: 0;
    white-space: nowrap;
  }
  
  /* 优化内容区域导航容器 */
  .content-nav-container {
    padding: 8px 12px;
    margin-bottom: 12px;
  }
  
  /* 内容区域导航菜单设置为水平滑动 */
  .content-nav-container .main-nav {
    display: flex;
    flex-direction: row;
    gap: 8px;
    overflow-x: auto;
    scroll-snap-type: x proximity;
    -webkit-overflow-scrolling: touch;
    padding-bottom: 5px;
    width: 100%;
    max-width: 100%;
    position: static;
    background: transparent;
    border-bottom: none;
    box-shadow: none;
    z-index: auto;
    /* 隐藏滚动条但保留滚动功能 */
    scrollbar-width: none;
    -ms-overflow-style: none;
  }
  
  /* 隐藏WebKit滚动条 */
  .content-nav-container .main-nav::-webkit-scrollbar {
    display: none;
  }
  
  /* 调整导航项样式 */
  .main-nav .nav-item {
    flex-shrink: 0;
    padding: 8px 16px;
    border-radius: 8px;
    border: none;
    background: transparent;
    font-size: 14px;
  }
  
  /* 调整导航项激活状态 */
  .main-nav .nav-item.active {
    background: var(--accent);
    border-color: var(--accent);
  }
  
  /* 优化内容容器的内边距 */
  .content-container {
    padding: 0 12px 12px;
  }
  
  /* 调整直播区域的内边距 */
  .live-section {
    padding: 12px;
    margin-bottom: 12px;
  }
}

/* 平板和PC屏幕显示广告位 */
@media (min-width: 1024px) {
  .left-ads, .right-ads {
    display: block;
  }
}

/* 小屏幕移动设备优化 */
@media (max-width: 480px) {
  .event-card {
    padding: 10px;
    gap: 6px;
  }
  
  .event-card .time {
    font-size: 13px;
  }
  
  .event-card .event-title {
    font-size: 13px;
    line-height: 1.3;
  }
  
  .event-card .competition {
    font-size: 11px;
  }
  
  /* 优化导航项的字体大小 */
  .nav-item {
    font-size: 12px;
    padding: 6px 12px;
  }
  
  /* 优化日期选项卡的按钮大小 */
  .date-tabs button {
    font-size: 12px;
    padding: 6px 12px;
  }
}

.time { font-weight: 600; color: var(--text); }
.match { display: flex; flex-direction: column; gap: 6px; }
.teams { font-weight: 600; }
.meta { color: var(--muted); font-size: 13px; }

.live-dot {
  display: inline-block;
  width: 10px; height: 10px;
  margin-right: 8px;
  border-radius: 50%;
  background: #ef4444;
  box-shadow: 0 0 0 0 rgba(239,68,68,0.7);
  animation: pulse 1.6s ease-in-out infinite;
  vertical-align: middle;
}

@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(239,68,68,0.6); opacity: 1; }
  50% { box-shadow: 0 0 0 8px rgba(239,68,68,0); opacity: 0.85; }
  100% { box-shadow: 0 0 0 0 rgba(239,68,68,0); opacity: 1; }
}

.right { display: flex; align-items: center; gap: 8px; justify-content: flex-end; }
.tag {
  font-size: 12px; padding: 6px 12px; border-radius: 999px; border: 1px solid var(--border);
  background: var(--card); color: var(--text);
  transition: all 0.2s ease;
}
.tag.accent { background: var(--accent); color: white; border-color: var(--accent); }
.tag.good { background: var(--accent-2); color: white; border-color: var(--accent-2); }

.tag:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(0,0,0,0.2);
}

/* 频道链接美化：去下划线与悬停背景色 */
a.tag { text-decoration: none; transition: background .2s ease, color .2s ease, box-shadow .2s ease; }
a.tag:hover { background: #e9ecef; }
a.tag.accent:hover { filter: brightness(0.95); }
.tag.accent { background: var(--accent); color: white; border-color: transparent; box-shadow: 0 2px 8px rgba(37, 99, 235, 0.3); }
.tag.good { background: var(--accent-2); color: white; border-color: transparent; }

.site-footer {
  grid-column: 1 / -1; /* 跨越所有列 */
  display: flex; justify-content: space-between; align-items: center;
  gap: 12px; padding: 20px; border-top: 1px solid var(--border); color: var(--muted);
  background: var(--card);
  margin-top: 30px;
}
.site-footer a { color: var(--text); transition: color 0.2s ease; }
.site-footer a:hover { color: var(--accent); }

@media (max-width: 1200px) {
  .nav-container {
    padding: 12px 15px;
  }
  
  .nav-item {
    padding: 6px 12px;
    font-size: 13px;
  }
  
  .content-container {
    padding: 0 15px 20px;
  }
}

/* PC端广告布局优化 */
@media (min-width: 1201px) {
  .layout-container {
    grid-template-columns: var(--ad-width) 1fr var(--ad-width);
  }
  
  .left-ads, .right-ads {
    display: block;
    height: calc(100vh - 80px); /* 减去顶部导航高度 */
    position: sticky;
    top: 80px;
    overflow-y: auto;
  }
}

@media (max-width: 1200px) and (min-width: 1025px) {
  .layout-container {
    grid-template-columns: 1fr var(--ad-width);
  }
  
  .left-ads {
    display: none; /* 在中等屏幕上隐藏左侧广告栏 */
  }
  
  .right-ads {
    display: block;
    height: calc(100vh - 80px);
    position: sticky;
    top: 80px;
    overflow-y: auto;
  }
  
  .nav-container {
    flex-wrap: wrap;
    gap: 10px;
  }
  
  .main-nav {
    order: 3;
    width: 100%;
    justify-content: center;
    margin-top: 10px;
  }
}

@media (max-width: 1024px) {
  .layout-container {
    grid-template-columns: 1fr;
    grid-template-rows: auto 1fr auto;
    gap: 0;
  }
  
  .left-ads, .right-ads {
    display: none; /* 在中等屏幕上隐藏广告栏 */
  }
  
  .nav-container {
    flex-wrap: wrap;
    gap: 10px;
    padding: 12px 15px;
  }
  
  .main-nav {
    order: 3;
    width: 100%;
    justify-content: flex-start;
    margin-top: 10px;
    overflow-x: auto;
    padding-bottom: 5px;
  }
  
  .nav-item {
    flex-shrink: 0;
    padding: 6px 12px;
    font-size: 13px;
  }
  
  .content-container {
    padding: 0 15px 20px;
  }
}

@media (max-width: 768px) {
  .date-tabs {
    display: grid; /* 保持grid布局 */
    grid-auto-flow: column;
    grid-auto-columns: max-content;
    gap: 6px;
    justify-content: flex-start; /* 在移动端从左到右排列，而不是居中 */
    padding: 8px 0;
    margin-bottom: 15px;
  }
  
  .date-tabs button {
    padding: 6px 10px;
    font-size: 12px;
  }
  
  /* 在live.html的移动端显示返回首页标志并隐藏导航菜单 */
  .live-page .home-link {
    display: block;
    right: 20px;
  }
  
  .live-page .main-nav {
    display: none;
  }
}

/* PC端live.html隐藏导航并显示返回首页图标 */
@media (min-width: 769px) {
  .live-page .main-nav {
    display: none;
  }
  
  .live-page .home-link {
    display: block;
    right: 20px;
  }
}

@media (max-width: 480px) {
  .nav-container {
    padding: 8px 10px;
  }
  
  .logo {
    font-size: 16px;
  }
  
  .logo-emoji {
    font-size: 18px;
  }
  
  .main-nav {
    gap: 2px;
  }
  
  .nav-item {
    padding: 5px 8px;
    font-size: 11px;
  }
  
  .content-container {
    padding: 0 10px 10px;
  }
  
  .date-tabs {
    gap: 4px;
  }
  
  .date-tabs button {
    padding: 5px 8px;
    font-size: 11px;
  }
  
  .event-card { 
    grid-template-columns: 1fr; 
    cursor: pointer; 
    padding: 10px;
    gap: 8px;
  }
  
  .time { 
    font-weight: 600; 
    margin-bottom: 6px; 
    font-size: 13px;
  }
  
  .right { 
    justify-content: flex-start; 
    gap: 6px; 
  }
  
  .tag { 
    font-size: 10px; 
    padding: 4px 6px; 
  }
  
  .event-title {
    font-size: 13px;
    line-height: 1.3;
  }
  
  .competition {
    font-size: 11px;
  }
}

@media (min-width: 1280px) {
  .events { max-width: 1200px; }
}

@media (prefers-reduced-motion: reduce) {
  .date-tabs button { transition: none; }
  .live-dot { animation: none; }
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f5f7fb;
    --card: #fff;
    --text: #111827;
    --muted: #6b7280;
    --border: #e5e7eb;
    --accent: #2563eb;
    --accent-2: #16a34a;
  }
  .topbar { background: rgba(255,255,255,0.8); }
  .tag { background: #f3f4f6; }
  .tag.accent { background: var(--accent); box-shadow: 0 2px 8px rgba(37, 99, 235, 0.3); }
  a.tag:hover { background: #e9ecf2; }
  .event-card:hover { background: #eef2f7; border-color: #d7dce5; box-shadow: 0 4px 12px rgba(0,0,0,0.08); }
}