/* ============================================
   AI 音乐库 · 静态站点主样式
   深色主题 · 青→紫渐变 · 玻璃拟物 · 无框架
   ============================================ */

:root {
  /* 背景层 */
  --bg-0: #050816;          /* 顶部近黑 */
  --bg-1: #0a1124;          /* 卡片层 */
  --bg-2: #0d1b3d;          /* 深空蓝渐变中点 */
  --bg-3: #111a3e;          /* 强调面板 */

  /* 文字 */
  --text-0: #e6edf3;        /* 主 */
  --text-1: #b8c3d6;        /* 次 */
  --text-2: #8b9bb4;        /* 辅 */
  --text-3: #5a6b85;        /* 弱 */

  /* 边框 / 分隔 */
  --border: rgba(255, 255, 255, 0.08);
  --border-2: rgba(255, 255, 255, 0.14);

  /* 主色：青→紫渐变 */
  --c-cyan: #00e5ff;
  --c-violet: #a78bfa;
  --c-cyan-glow: rgba(0, 229, 255, 0.5);
  --c-violet-glow: rgba(167, 139, 250, 0.5);
  --gradient: linear-gradient(135deg, #00e5ff 0%, #a78bfa 100%);
  --gradient-soft: linear-gradient(135deg, rgba(0,229,255,0.18) 0%, rgba(167,139,250,0.18) 100%);

  /* 状态色（语种 / 状态标签用） */
  --c-lang-zh: #00e5ff;
  --c-lang-zh-bg: rgba(0, 229, 255, 0.12);
  --c-lang-en: #a78bfa;
  --c-lang-en-bg: rgba(167, 139, 250, 0.12);
  --c-published: #10e070;
  --c-published-bg: rgba(16, 224, 112, 0.12);
  --c-proxy: #ffb84d;
  --c-proxy-bg: rgba(255, 184, 77, 0.12);

  /* 字体 */
  --font-mono: 'JetBrains Mono', 'SF Mono', 'Cascadia Code', Consolas, 'Courier New', monospace;
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

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

html { -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--font-body);
  color: var(--text-0);
  background: var(--bg-0);
  background-image:
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(0,229,255,0.10) 0%, transparent 60%),
    radial-gradient(ellipse 60% 40% at 80% 110%, rgba(167,139,250,0.10) 0%, transparent 60%),
    linear-gradient(180deg, var(--bg-0) 0%, var(--bg-2) 50%, var(--bg-0) 100%);
  background-attachment: fixed;
  line-height: 1.7;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  padding-bottom: 96px; /* 给底部播放器留位 */
}

a { color: inherit; text-decoration: none; transition: color .2s, opacity .2s; }
a:hover { color: var(--c-cyan); }
img { max-width: 100%; display: block; }

.wrap { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.wrap-narrow { max-width: 760px; margin: 0 auto; padding: 0 20px; }

main { flex: 1; padding: 32px 0 60px; }

.mono { font-family: var(--font-mono); }

/* ---------- 顶部导航 ---------- */
.site-nav {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  background: rgba(5, 8, 22, 0.7);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 20px; max-width: 1200px; margin: 0 auto;
  gap: 24px;
}
.nav-brand {
  display: flex; align-items: center; gap: 12px;
  font-weight: 600; font-size: 17px; letter-spacing: 0.5px;
}
.nav-brand .brand-mark {
  display: inline-flex; align-items: center; justify-content: center;
  width: 36px; height: 36px;
  background: var(--gradient);
  border-radius: 10px;
  color: #050816;
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: 14px;
  box-shadow: 0 0 24px var(--c-cyan-glow);
}
.nav-brand .brand-text { display: flex; flex-direction: column; line-height: 1.2; }
.nav-brand .brand-text strong { font-size: 15px; }
.nav-brand .brand-text small {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-2);
  letter-spacing: 1.5px;
  text-transform: uppercase;
}

.nav-links { display: flex; gap: 4px; }
.nav-link {
  padding: 8px 14px;
  font-size: 14px;
  color: var(--text-1);
  border-radius: 8px;
  font-family: var(--font-mono);
  letter-spacing: 0.5px;
  position: relative;
}
.nav-link:hover { color: var(--c-cyan); background: rgba(0,229,255,0.06); }
.nav-link.active {
  color: var(--c-cyan);
  background: rgba(0,229,255,0.08);
}
.nav-link.active::after {
  content: ''; position: absolute; left: 14px; right: 14px; bottom: 2px;
  height: 2px; background: var(--gradient); border-radius: 1px;
}

.nav-search {
  flex: 0 1 240px;
  display: flex; align-items: center;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 6px 12px;
  transition: border-color .2s, background .2s;
}
.nav-search:focus-within {
  border-color: var(--c-cyan);
  background: rgba(0,229,255,0.06);
  box-shadow: 0 0 0 3px rgba(0,229,255,0.12);
}
.nav-search input {
  background: transparent; border: none; outline: none;
  color: var(--text-0); font-family: var(--font-body); font-size: 13px;
  width: 100%;
}
.nav-search input::placeholder { color: var(--text-3); }
.nav-search .search-icon {
  width: 14px; height: 14px; color: var(--text-2); flex-shrink: 0; margin-right: 8px;
}

/* ---------- Hero ---------- */
.hero {
  padding: 60px 0 40px;
  text-align: center;
  position: relative;
}
.hero h1 {
  font-size: clamp(32px, 6vw, 56px);
  font-weight: 800;
  letter-spacing: -0.5px;
  line-height: 1.1;
  background: linear-gradient(135deg, #e6edf3 0%, #00e5ff 50%, #a78bfa 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 16px;
  text-shadow: 0 0 40px rgba(0,229,255,0.15);
}
.hero p {
  font-family: var(--font-mono);
  color: var(--text-1);
  font-size: 14px;
  letter-spacing: 2px;
  text-transform: uppercase;
}
.hero .accent {
  display: inline-block;
  width: 40px; height: 2px;
  background: var(--gradient);
  margin: 24px auto 0;
  border-radius: 1px;
}

/* ---------- 区段标题 ---------- */
.section-head {
  display: flex; align-items: baseline; justify-content: space-between;
  margin: 32px 0 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}
.section-title {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  color: var(--c-cyan);
  letter-spacing: 2px;
  text-transform: uppercase;
}
.section-meta {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-2);
}

/* ---------- 歌曲卡片网格 ---------- */
.song-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 20px;
  margin-top: 16px;
}

.song-card {
  display: block;
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 14px;
  transition: transform .25s ease, border-color .25s ease, box-shadow .25s ease;
  position: relative;
  overflow: hidden;
}
.song-card::before {
  content: ''; position: absolute; inset: 0;
  background: var(--gradient-soft);
  opacity: 0;
  transition: opacity .25s;
  pointer-events: none;
}
.song-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-2);
  box-shadow: 0 12px 40px -12px var(--c-cyan-glow);
}
.song-card:hover::before { opacity: 0.5; }

.cover {
  position: relative;
  aspect-ratio: 1 / 1;
  border-radius: 10px;
  overflow: hidden;
  background: var(--bg-3);
}
.cover img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform .5s ease, filter .5s ease;
}
.song-card:hover .cover img { transform: scale(1.05); filter: brightness(1.05); }

.cover .play-overlay {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  background: rgba(5, 8, 22, 0.4);
  opacity: 0;
  transition: opacity .2s;
}
.song-card:hover .play-overlay { opacity: 1; }
.play-overlay .play-btn {
  width: 52px; height: 52px;
  border-radius: 50%;
  background: var(--gradient);
  color: #050816;
  display: flex; align-items: center; justify-content: center;
  border: none; cursor: pointer;
  box-shadow: 0 0 24px var(--c-cyan-glow);
  transform: scale(0.85);
  transition: transform .2s;
}
.song-card:hover .play-btn { transform: scale(1); }
.play-btn svg { width: 20px; height: 20px; fill: currentColor; }

.equalizer {
  position: absolute; bottom: 8px; right: 8px;
  display: none;
  align-items: flex-end;
  gap: 2px;
  height: 14px;
  background: rgba(5,8,22,0.7);
  border-radius: 6px;
  padding: 3px 5px;
  backdrop-filter: blur(4px);
}
.equalizer .bar {
  display: inline-block; width: 2px;
  background: var(--c-cyan);
  border-radius: 1px;
  animation: eq-bounce 0.9s ease-in-out infinite;
}
.equalizer .bar:nth-child(2) { animation-delay: 0.15s; }
.equalizer .bar:nth-child(3) { animation-delay: 0.3s; }
.equalizer .bar:nth-child(4) { animation-delay: 0.45s; }
.song-card.is-playing .equalizer { display: flex; }
@keyframes eq-bounce {
  0%, 100% { height: 30%; }
  50%      { height: 100%; }
}

.card-meta { padding: 12px 4px 2px; }
.card-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-0);
  line-height: 1.4;
  margin-bottom: 4px;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.card-sub {
  display: flex; align-items: center; gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-2);
}
.card-sub .dot { color: var(--text-3); }
.card-sub .dur { margin-left: auto; }

.lang-pill {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 600;
  padding: 2px 6px;
  border-radius: 4px;
  letter-spacing: 0.5px;
}
.lang-pill[data-lang="国语"]  { color: var(--c-lang-zh);  background: var(--c-lang-zh-bg); }
.lang-pill[data-lang="英语"]  { color: var(--c-lang-en);  background: var(--c-lang-en-bg); }
.lang-pill[data-lang="zh"]    { color: var(--c-lang-zh);  background: var(--c-lang-zh-bg); }
.lang-pill[data-lang="en"]    { color: var(--c-lang-en);  background: var(--c-lang-en-bg); }

/* ---------- 标签栏 ---------- */
.filter-bar {
  display: flex; gap: 8px;
  flex-wrap: wrap;
  margin: 24px 0 16px;
  padding: 12px 16px;
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--border);
  border-radius: 12px;
}
.filter-bar .filter-label {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-2);
  letter-spacing: 1.5px;
  text-transform: uppercase;
  align-self: center;
  margin-right: 4px;
}
.filter-chip {
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-1);
  padding: 6px 12px;
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.5px;
  cursor: pointer;
  transition: all .2s;
}
.filter-chip:hover {
  border-color: var(--c-cyan);
  color: var(--c-cyan);
}
.filter-chip.active {
  background: var(--gradient);
  color: #050816;
  border-color: transparent;
  font-weight: 600;
}

/* ---------- 搜索结果 ---------- */
.search-meta {
  font-family: var(--font-mono);
  color: var(--text-2);
  font-size: 13px;
  margin: 16px 0;
}
.search-meta .count { color: var(--c-cyan); }

.empty-tip {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-2);
  font-family: var(--font-mono);
  font-size: 14px;
  border: 1px dashed var(--border);
  border-radius: 12px;
  margin-top: 24px;
}

/* ---------- 歌曲详情页 ---------- */
.song-hero {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 32px;
  align-items: start;
  margin-bottom: 32px;
}
.song-hero .cover {
  aspect-ratio: 1 / 1;
  border-radius: 16px;
  box-shadow: 0 20px 60px -20px rgba(0,229,255,0.4), 0 0 0 1px var(--border-2);
}
.song-hero .cover .equalizer { display: none; }
.song-hero .info { padding-top: 8px; }
.song-hero h1 {
  font-size: 36px;
  font-weight: 700;
  letter-spacing: -0.5px;
  line-height: 1.2;
  margin-bottom: 8px;
}
.song-hero .subtitle {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--c-violet);
  letter-spacing: 1px;
  margin-bottom: 24px;
}
.song-hero .meta-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px 24px;
  padding: 20px;
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border);
  border-radius: 12px;
  margin-bottom: 24px;
}
.meta-grid .meta-row {
  display: flex; flex-direction: column; gap: 4px;
}
.meta-row .meta-label {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-3);
  letter-spacing: 1.5px;
  text-transform: uppercase;
}
.meta-row .meta-value {
  font-size: 14px;
  color: var(--text-0);
}

.player-block {
  padding: 16px 20px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  border-radius: 14px;
  display: flex; align-items: center; gap: 16px;
}
.player-block .play-btn {
  width: 52px; height: 52px;
  flex-shrink: 0;
  border-radius: 50%;
  background: var(--gradient);
  color: #050816;
  border: none; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 0 24px var(--c-cyan-glow);
  transition: transform .15s;
}
.player-block .play-btn:hover { transform: scale(1.05); }
.player-block .play-btn svg { width: 22px; height: 22px; fill: currentColor; }
.player-block .now-info { flex: 1; min-width: 0; }
.player-block .now-title {
  font-size: 16px; font-weight: 600;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.player-block .now-sub {
  font-family: var(--font-mono);
  font-size: 12px; color: var(--text-2);
  margin-top: 2px;
}
.player-block .progress {
  width: 100%;
  height: 4px;
  background: rgba(255,255,255,0.08);
  border-radius: 2px;
  overflow: hidden;
  margin-top: 10px;
  cursor: pointer;
}
.player-block .progress .bar {
  height: 100%;
  width: 0;
  background: var(--gradient);
  border-radius: 2px;
  position: relative;
  transition: width 0.1s linear;
}
.player-block .progress .bar::after {
  content: ''; position: absolute; right: 0; top: 50%;
  width: 8px; height: 8px;
  background: var(--c-cyan);
  border-radius: 50%;
  transform: translate(50%, -50%);
  box-shadow: 0 0 8px var(--c-cyan);
  opacity: 0;
  transition: opacity .15s;
}
.player-block:hover .progress .bar::after { opacity: 1; }
.player-block .time-row {
  display: flex; justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 11px; color: var(--text-2);
  margin-top: 6px;
}

/* ---------- 歌词 ---------- */
.lyrics {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 32px 24px;
  max-height: 520px;
  overflow-y: auto;
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 2.4;
  letter-spacing: 0.5px;
  scroll-behavior: smooth;
  text-align: center;
}
.lyrics::-webkit-scrollbar { width: 6px; }
.lyrics::-webkit-scrollbar-thumb { background: var(--border-2); border-radius: 3px; }
.lyrics .lyric-line {
  color: var(--text-2);
  transition: color .3s, transform .3s, text-shadow .3s;
  display: block;
  padding: 2px 0;
}
.lyrics .lyric-line.is-active {
  color: var(--c-cyan);
  transform: scale(1.04);
  text-shadow: 0 0 12px var(--c-cyan-glow);
  font-weight: 600;
}
.lyrics .lyric-empty {
  color: var(--text-3);
  font-style: italic;
}

/* ---------- about 页 ---------- */
.about-section {
  max-width: 720px;
  margin: 0 auto;
  padding: 60px 20px;
}
.about-section h1 {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 32px;
  background: linear-gradient(135deg, #e6edf3 0%, #00e5ff 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.about-section h2 {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--c-cyan);
  letter-spacing: 1.5px;
  text-transform: uppercase;
  margin: 36px 0 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}
.about-section p {
  color: var(--text-1);
  font-size: 15px;
  margin-bottom: 14px;
  line-height: 1.8;
}
.about-section .info-block {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px 24px;
  margin: 16px 0;
}
.about-section .info-block code {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--c-violet);
  background: rgba(167,139,250,0.1);
  padding: 2px 6px;
  border-radius: 4px;
}

/* ---------- footer ---------- */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 24px 0;
  margin-top: 60px;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-3);
  letter-spacing: 1px;
}
.site-footer p { margin: 4px 0; }
.site-footer .copy { color: var(--text-3); }
.site-footer a { color: var(--text-2); }
.site-footer a:hover { color: var(--c-cyan); }

/* ---------- 响应式 ---------- */
@media (max-width: 720px) {
  .nav-search { display: none; }
  .nav-links { gap: 0; }
  .nav-link { padding: 8px 10px; font-size: 13px; }
  .song-hero { grid-template-columns: 1fr; gap: 20px; }
  .song-hero .cover { max-width: 240px; margin: 0 auto; }
  .song-hero h1 { font-size: 28px; }
  .song-hero .meta-grid { grid-template-columns: 1fr; }
  .song-grid { grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 14px; }
  .lyrics { padding: 24px 16px; font-size: 13px; line-height: 2.2; }
  body { padding-bottom: 80px; }
}

@media (max-width: 480px) {
  .wrap, .wrap-narrow { padding: 0 14px; }
  .hero { padding: 40px 0 24px; }
  .filter-bar { padding: 10px 12px; }
}