/* ===== Reset ===== */
* { margin: 0; padding: 0; box-sizing: border-box; }

/* ===== Design Tokens ===== */
:root {
  --bg: #FAFAFA;
  --bg-card: #FFFFFF;
  --bg-elevated: #FFFFFF;
  --bg-muted: #F4F4F5;
  --text-1: #18181B;
  --text-2: #52525B;
  --text-3: #A1A1AA;
  --border: #E4E4E7;
  --border-hover: #D4D4D8;
  --accent: #FF6B6B;
  --accent-soft: rgba(255,107,107,.08);
  --shadow-1: 0 1px 2px rgba(0,0,0,.05);
  --shadow-2: 0 4px 12px rgba(0,0,0,.07);
  --shadow-3: 0 8px 24px rgba(0,0,0,.1);
  --shadow-up: 0 -20px 40px rgba(0,0,0,.06);
  --r: 10px;
  --r-sm: 6px;
  --font: 'Noto Sans SC', system-ui, sans-serif;
  --marquee-duration: 30s;
  --marquee-gap: 16px;
  color-scheme: light dark;
}

/* ===== Dark Mode ===== */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #09090B;
    --bg-card: #18181B;
    --bg-elevated: #27272A;
    --bg-muted: #18181B;
    --text-1: #FAFAFA;
    --text-2: #A1A1AA;
    --text-3: #71717A;
    --border: #27272A;
    --border-hover: #3F3F46;
    --accent-soft: rgba(255,107,107,.12);
    --shadow-1: 0 1px 2px rgba(0,0,0,.3);
    --shadow-2: 0 4px 12px rgba(0,0,0,.4);
    --shadow-3: 0 8px 24px rgba(0,0,0,.5);
    --shadow-up: 0 -20px 40px rgba(0,0,0,.3);
  }
}
[data-theme="dark"] {
  --bg: #09090B;
  --bg-card: #18181B;
  --bg-elevated: #27272A;
  --bg-muted: #18181B;
  --text-1: #FAFAFA;
  --text-2: #A1A1AA;
  --text-3: #71717A;
  --border: #27272A;
  --border-hover: #3F3F46;
  --accent-soft: rgba(255,107,107,.12);
  --shadow-1: 0 1px 2px rgba(0,0,0,.3);
  --shadow-2: 0 4px 12px rgba(0,0,0,.4);
  --shadow-3: 0 8px 24px rgba(0,0,0,.5);
  --shadow-up: 0 -20px 40px rgba(0,0,0,.3);
}
[data-theme="light"] {
  --bg: #FAFAFA;
  --bg-card: #FFFFFF;
  --bg-elevated: #FFFFFF;
  --bg-muted: #F4F4F5;
  --text-1: #18181B;
  --text-2: #52525B;
  --text-3: #A1A1AA;
  --border: #E4E4E7;
  --border-hover: #D4D4D8;
  --accent-soft: rgba(255,107,107,.08);
  --shadow-1: 0 1px 2px rgba(0,0,0,.05);
  --shadow-2: 0 4px 12px rgba(0,0,0,.07);
  --shadow-3: 0 8px 24px rgba(0,0,0,.1);
  --shadow-up: 0 -20px 40px rgba(0,0,0,.06);
}

html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text-1);
  min-height: 100vh;
  overflow-x: hidden;
  transition: background .25s, color .25s;
}

/* ===== 顶部导航 ===== */
.topnav {
  position: sticky;
  top: 0;
  z-index: 200;
  background: var(--bg-elevated);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(12px);
  transition: background .25s, border-color .25s;
}
.topnav-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 12px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo {
  font-size: 20px;
  font-weight: 900;
  letter-spacing: 1px;
  color: var(--text-1);
}
.logo span { margin-left: 4px; }
.topnav-right {
  display: flex;
  align-items: center;
  gap: 10px;
}
.game-badge {
  background: var(--accent-soft);
  color: var(--accent);
  padding: 4px 12px;
  border-radius: var(--r-sm);
  font-size: 12px;
  font-weight: 700;
}
.theme-toggle {
  width: 36px;
  height: 36px;
  border-radius: var(--r-sm);
  border: 1px solid var(--border);
  background: var(--bg-card);
  font-size: 16px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all .15s;
}
.theme-toggle:hover {
  border-color: var(--border-hover);
  background: var(--bg-muted);
}

/* ===== Marquee 滚动展示 ===== */
.marquee-section {
  position: relative;
  padding: 28px 0 20px;
  overflow: hidden;
}
.marquee-wrapper {
  display: flex;
  gap: var(--marquee-gap);
  overflow: hidden;
  padding: 6px 0;
}
.marquee-track {
  display: flex;
  gap: var(--marquee-gap);
  animation: marquee-scroll var(--marquee-duration) linear infinite;
  flex-shrink: 0;
}
.marquee-reverse {
  animation-direction: reverse;
}
.marquee-wrapper:hover .marquee-track {
  animation-play-state: paused;
}

@keyframes marquee-scroll {
  from { transform: translateX(0); }
  to   { transform: translateX(calc(-100% - var(--marquee-gap))); }
}

/* Marquee 卡片 */
.marquee-card {
  flex-shrink: 0;
  width: 200px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 16px;
  display: flex;
  align-items: center;
  gap: 12px;
  cursor: pointer;
  transition: all .2s;
}
.marquee-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-2);
  transform: translateY(-2px);
}
.marquee-card-icon {
  font-size: 36px;
  line-height: 1;
  flex-shrink: 0;
}
.marquee-card-info {
  min-width: 0;
}
.marquee-card-name {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-1);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.marquee-card-cat {
  font-size: 11px;
  color: var(--text-3);
  margin-top: 2px;
}

/* Marquee 两侧渐隐 */
.marquee-fade {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 80px;
  pointer-events: none;
  z-index: 5;
}
.marquee-fade-left {
  left: 0;
  background: linear-gradient(to right, var(--bg), transparent);
}
.marquee-fade-right {
  right: 0;
  background: linear-gradient(to left, var(--bg), transparent);
}

/* ===== 筛选栏 ===== */
.filter-section {
  position: sticky;
  top: 53px;
  z-index: 100;
  background: var(--bg-elevated);
  border-bottom: 1px solid var(--border);
  padding: 12px 20px;
  transition: background .25s, border-color .25s;
}
.filters {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 6px;
  max-width: 1280px;
  margin: 0 auto;
}
.filter-btn {
  border: 1px solid var(--border);
  background: transparent;
  border-radius: var(--r-sm);
  padding: 6px 16px;
  font-size: 13px;
  font-family: var(--font);
  cursor: pointer;
  transition: all .15s;
  font-weight: 600;
  color: var(--text-3);
  white-space: nowrap;
}
.filter-btn:hover {
  color: var(--text-1);
  border-color: var(--border-hover);
  background: var(--bg-muted);
}
.filter-btn.active {
  background: var(--text-1);
  color: var(--bg);
  border-color: var(--text-1);
}

/* ===== 游戏数量 ===== */
.game-count {
  text-align: center;
  padding: 16px 20px 4px;
  color: var(--text-3);
  font-size: 13px;
}
.game-count strong {
  color: var(--accent);
}

/* ===== 游戏网格 ===== */
.game-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
  padding: 12px clamp(16px, 3vw, 40px) 48px;
  max-width: 1280px;
  margin: 0 auto;
}

/* ===== 游戏卡片 ===== */
.game-card {
  background: var(--bg-card);
  border-radius: var(--r);
  border: 1px solid var(--border);
  overflow: hidden;
  cursor: pointer;
  transition: all .2s ease;
  position: relative;
  animation: fadeUp .4s ease backwards;
}
.game-card:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-3);
  transform: translateY(-4px);
}
.game-card:active {
  transform: scale(.98);
  box-shadow: var(--shadow-1);
}

/* 卡片顶部 */
.card-top {
  height: 140px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}
/* Dot pattern overlay */
.card-top::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle, rgba(255,255,255,.15) 1px, transparent 1px);
  background-size: 16px 16px;
  z-index: 1;
}
.card-top::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 40%, rgba(0,0,0,.12));
  z-index: 1;
}

.card-icon {
  font-size: 52px;
  z-index: 2;
  transition: transform .25s;
  background: rgba(255,255,255,.18);
  width: 80px;
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--r);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid rgba(255,255,255,.2);
}
.game-card:hover .card-icon {
  transform: scale(1.06) translateY(-2px);
  background: rgba(255,255,255,.25);
}

/* 年龄标签 */
.age-badge {
  position: absolute;
  top: 10px; left: 10px;
  background: rgba(0,0,0,.45);
  color: #fff;
  padding: 2px 8px;
  border-radius: var(--r-sm);
  font-size: 10px;
  font-weight: 700;
  z-index: 3;
  backdrop-filter: blur(4px);
}

/* 语音按钮 */
.voice-btn {
  position: absolute;
  top: 10px; right: 10px;
  width: 32px; height: 32px;
  border-radius: var(--r-sm);
  border: none;
  background: rgba(0,0,0,.3);
  color: #fff;
  font-size: 14px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all .15s;
  z-index: 5;
  backdrop-filter: blur(4px);
}
.voice-btn:hover { background: rgba(0,0,0,.5); transform: scale(1.08); }
.voice-btn:active { transform: scale(.9); }
.voice-btn.speaking {
  background: var(--accent);
  animation: pulse-ring 1s ease-out infinite;
}
@keyframes pulse-ring {
  0%   { box-shadow: 0 0 0 0 rgba(255,107,107,.5); }
  100% { box-shadow: 0 0 0 10px rgba(255,107,107,0); }
}

/* 卡片内容 */
.card-body {
  padding: 14px 16px 16px;
}
.card-body h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-1);
  margin-bottom: 6px;
}
.card-category {
  display: inline-block;
  padding: 1px 8px;
  border-radius: var(--r-sm);
  font-size: 10px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 6px;
}
.card-body p {
  font-size: 12px;
  color: var(--text-3);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* 开始游戏 */
.card-play {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  padding: 10px;
  background: var(--bg-muted);
  font-weight: 600;
  font-size: 12px;
  color: var(--text-3);
  transition: all .2s;
  border-top: 1px solid var(--border);
}
.game-card:hover .card-play {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}
.card-play-arrow {
  transition: transform .2s;
}
.game-card:hover .card-play-arrow {
  transform: translateX(3px);
}

/* ===== 动画 ===== */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ===== 页脚 ===== */
.footer {
  text-align: center;
  padding: 24px 20px;
  color: var(--text-3);
  font-size: 12px;
  border-top: 1px solid var(--border);
  transition: all .25s;
}
.footer-emoji {
  font-size: 18px;
  letter-spacing: 8px;
  margin-bottom: 8px;
  opacity: .5;
}

/* ===== 响应式 ===== */
@media (max-width: 768px) {
  .game-grid {
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 12px;
    padding: 10px 12px 36px;
  }
  .card-top { height: 120px; }
  .card-icon { font-size: 48px; }
  .marquee-card { width: 160px; padding: 12px; }
  .marquee-card-icon { font-size: 28px; }
}
@media (max-width: 480px) {
  .game-grid { grid-template-columns: 1fr 1fr; gap: 10px; }
  .card-top { height: 100px; }
  .card-icon { font-size: 40px; }
  .card-body { padding: 10px 12px 12px; }
  .card-body h3 { font-size: 14px; }
  .card-body p { font-size: 11px; -webkit-line-clamp: 1; }
  .card-play { padding: 8px; font-size: 11px; }
  .filter-btn { padding: 5px 12px; font-size: 12px; }
  .marquee-card { width: 140px; padding: 10px; gap: 8px; }
}