/* ==========================================================================
   每日大赛校园大赛 —— 每日大赛原创音乐新星选拔平台
   视觉风格：舞台灯光 + 声波律动（暗黑系沉浸式）
   主色：霓虹紫 #8A2BE2 / 辅助：电音蓝 #00FFFF / 背景：深邃黑 #0A0A0A
   ========================================================================== */

:root {
  --c-neon-purple: #8A2BE2;   /* 主色：霓虹紫 */
  --c-electric-blue: #00FFFF; /* 辅助色：电音蓝 */
  --c-bg: #0A0A0A;            /* 背景色：深邃黑 */
  --c-card: #1A1A1A;          /* 卡片色：暗夜灰 */
  --c-text: #F5F5F5;          /* 正文色：亮白 */
  --c-text-dim: #A9A9B8;      /* 次级文字 */
  --c-purple-glow: rgba(138, 43, 226, 0.55);
  --c-blue-glow: rgba(0, 255, 255, 0.45);
  --grad-neon: linear-gradient(135deg, #8A2BE2 0%, #00FFFF 100%);
  --radius: 14px;
  --shadow-card: 0 0 0 1px rgba(138,43,226,0.35), 0 8px 30px rgba(0,0,0,0.6);
  --maxw: 1240px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Segoe UI", sans-serif;
  background: var(--c-bg);
  color: var(--c-text);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* 背景声波律动氛围层 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background:
    radial-gradient(circle at 15% 20%, rgba(138,43,226,0.18), transparent 45%),
    radial-gradient(circle at 85% 75%, rgba(0,255,255,0.12), transparent 45%);
  z-index: -2;
  pointer-events: none;
}

a { color: inherit; text-decoration: none; transition: color .25s; }
a:hover { color: var(--c-electric-blue); }
img { max-width: 100%; display: block; }
ul { list-style: none; }

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }

/* ===== 通用标题 ===== */
.section { padding: 70px 0; }
.section-head { text-align: center; margin-bottom: 44px; }
.section-head .eyebrow {
  display: inline-block;
  color: var(--c-electric-blue);
  letter-spacing: 3px;
  font-size: .82rem;
  text-transform: uppercase;
  margin-bottom: 10px;
}
.section-head h2 {
  font-size: clamp(1.6rem, 3.4vw, 2.4rem);
  font-weight: 800;
  background: var(--grad-neon);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: 0 0 24px var(--c-purple-glow);
}
.section-head p { color: var(--c-text-dim); max-width: 720px; margin: 14px auto 0; }

/* ===== 按钮 ===== */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 26px; border-radius: 50px;
  font-weight: 700; font-size: .95rem; cursor: pointer;
  border: none; transition: all .3s; position: relative;
}
.btn-primary {
  background: var(--grad-neon); color: #0A0A0A;
  box-shadow: 0 0 18px var(--c-purple-glow);
}
.btn-primary:hover { box-shadow: 0 0 30px var(--c-blue-glow); transform: translateY(-2px); color: #0A0A0A; }
.btn-ghost {
  background: transparent; color: var(--c-text);
  border: 1.5px solid var(--c-neon-purple);
}
.btn-ghost:hover { border-color: var(--c-electric-blue); color: var(--c-electric-blue); box-shadow: 0 0 18px var(--c-blue-glow); }

/* ==========================================================================
   顶部导航
   ========================================================================== */
.site-header {
  position: sticky; top: 0; z-index: 900;
  background: rgba(10,10,10,0.82);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(138,43,226,0.28);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 70px; }
.brand { display: flex; align-items: center; gap: 12px; font-weight: 800; font-size: 1.15rem; }
.brand img { width: 40px; height: 40px; filter: drop-shadow(0 0 8px var(--c-purple-glow)); }
.brand span {
  background: var(--grad-neon); -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.nav-links { display: flex; align-items: center; gap: 26px; }
.nav-links a { font-size: .95rem; font-weight: 500; position: relative; }
.nav-links a::after {
  content: ""; position: absolute; left: 0; bottom: -6px; width: 0; height: 2px;
  background: var(--grad-neon); transition: width .3s;
}
.nav-links a:hover::after { width: 100%; }
.nav-actions { display: flex; align-items: center; gap: 12px; }
.nav-toggle { display: none; background: none; border: none; color: var(--c-text); font-size: 1.6rem; cursor: pointer; }

/* ==========================================================================
   焦点赛事轮播（首页模块1）
   ========================================================================== */
.hero-carousel { position: relative; overflow: hidden; height: clamp(420px, 62vh, 640px); }
.hero-slide {
  position: absolute; inset: 0; opacity: 0; transition: opacity 1s ease;
  background-size: cover; background-position: center;
  display: flex; align-items: center;
}
.hero-slide.active { opacity: 1; }
.hero-slide::before {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(90deg, rgba(10,10,10,0.92) 0%, rgba(10,10,10,0.55) 55%, rgba(10,10,10,0.3) 100%);
}
.hero-content { position: relative; max-width: 620px; padding: 0 20px; }
.hero-tag {
  display: inline-block; padding: 6px 16px; border-radius: 50px;
  background: rgba(138,43,226,0.22); border: 1px solid var(--c-neon-purple);
  color: var(--c-electric-blue); font-size: .8rem; letter-spacing: 1px; margin-bottom: 18px;
}
.hero-content h1, .hero-content h2 {
  font-size: clamp(1.8rem, 5vw, 3.2rem); font-weight: 900; line-height: 1.15; margin-bottom: 16px;
  text-shadow: 0 0 30px var(--c-purple-glow);
}
.hero-content p { color: var(--c-text-dim); font-size: 1.05rem; margin-bottom: 26px; }
.hero-dots { position: absolute; bottom: 24px; left: 50%; transform: translateX(-50%); display: flex; gap: 12px; z-index: 5; }
.hero-dots button {
  width: 36px; height: 5px; border: none; border-radius: 3px;
  background: rgba(245,245,245,0.3); cursor: pointer; transition: background .3s;
}
.hero-dots button.active { background: var(--grad-neon); box-shadow: 0 0 10px var(--c-blue-glow); }
.hero-arrow {
  position: absolute; top: 50%; transform: translateY(-50%); z-index: 5;
  width: 48px; height: 48px; border-radius: 50%; cursor: pointer;
  background: rgba(26,26,26,0.7); border: 1px solid var(--c-neon-purple);
  color: var(--c-text); font-size: 1.4rem; display: flex; align-items: center; justify-content: center;
  transition: all .3s;
}
.hero-arrow:hover { background: var(--c-neon-purple); box-shadow: 0 0 18px var(--c-purple-glow); }
.hero-arrow.prev { left: 18px; } .hero-arrow.next { right: 18px; }

/* ==========================================================================
   赛事倒计时霓虹灯牌（组件2）
   ========================================================================== */
.countdown-board {
  margin: 0 auto; max-width: var(--maxw); padding: 30px 24px;
  background: var(--c-card); border-radius: var(--radius);
  border: 1px solid rgba(138,43,226,0.4);
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 20px;
  box-shadow: var(--shadow-card);
}
.countdown-board .cd-title { font-weight: 800; font-size: 1.2rem; }
.countdown-board .cd-title .neon-flicker {
  color: var(--c-electric-blue); animation: neonFlicker 2.5s infinite alternate;
}
@keyframes neonFlicker {
  0%, 18%, 22%, 25%, 53%, 57%, 100% { text-shadow: 0 0 6px var(--c-electric-blue), 0 0 14px var(--c-electric-blue), 0 0 28px var(--c-neon-purple); opacity: 1; }
  20%, 24%, 55% { text-shadow: none; opacity: .55; }
}
.cd-timer { display: flex; gap: 14px; }
.cd-unit { text-align: center; min-width: 64px; }
.cd-unit .num {
  display: block; font-size: 2rem; font-weight: 900; font-variant-numeric: tabular-nums;
  color: var(--c-text); background: rgba(138,43,226,0.15);
  border: 1px solid var(--c-neon-purple); border-radius: 10px; padding: 6px 0;
  box-shadow: 0 0 14px var(--c-purple-glow);
}
.cd-unit .label { font-size: .78rem; color: var(--c-text-dim); margin-top: 6px; display: block; }

/* ==========================================================================
   通用卡片网格
   ========================================================================== */
.grid { display: grid; gap: 24px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: var(--c-card); border-radius: var(--radius); overflow: hidden;
  border: 1px solid rgba(138,43,226,0.25); transition: all .35s; position: relative;
}
.card:hover {
  transform: translateY(-6px);
  border-color: var(--c-electric-blue);
  box-shadow: 0 0 0 1px var(--c-electric-blue), 0 0 26px var(--c-purple-glow), 0 0 40px var(--c-blue-glow);
}
.card-img { position: relative; overflow: hidden; aspect-ratio: 16/10; }
.card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s; }
.card:hover .card-img img { transform: scale(1.08); }
.card-badge {
  position: absolute; top: 12px; left: 12px; z-index: 2;
  padding: 4px 12px; border-radius: 50px; font-size: .75rem; font-weight: 700;
  background: var(--grad-neon); color: #0A0A0A;
}
.card-body { padding: 18px 20px; }
.card-body h3 { font-size: 1.15rem; font-weight: 700; margin-bottom: 8px; }
.card-body p { color: var(--c-text-dim); font-size: .92rem; margin-bottom: 14px; }
.card-meta { display: flex; align-items: center; justify-content: space-between; font-size: .82rem; color: var(--c-text-dim); }

/* ==========================================================================
   热门作品试听（首页模块2）—— 投票卡片 + 频谱
   ========================================================================== */
.track-list { display: grid; gap: 14px; }
.track-item {
  display: flex; align-items: center; gap: 16px; padding: 14px 18px;
  background: var(--c-card); border-radius: var(--radius);
  border: 1px solid rgba(138,43,226,0.25); transition: all .3s;
}
.track-item:hover { border-color: var(--c-electric-blue); box-shadow: 0 0 20px var(--c-purple-glow); }
.track-rank { font-size: 1.4rem; font-weight: 900; width: 36px; text-align: center; color: var(--c-electric-blue); }
.track-cover { width: 60px; height: 60px; border-radius: 10px; object-fit: cover; flex-shrink: 0; }
.track-play {
  width: 46px; height: 46px; flex-shrink: 0; border-radius: 50%; cursor: pointer;
  background: var(--grad-neon); color: #0A0A0A; border: none;
  display: flex; align-items: center; justify-content: center; font-size: 1.1rem;
  box-shadow: 0 0 14px var(--c-purple-glow); transition: transform .25s;
}
.track-play:hover { transform: scale(1.12); }
.track-info { flex: 1; min-width: 0; }
.track-info h4 { font-size: 1rem; font-weight: 700; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.track-info span { font-size: .85rem; color: var(--c-text-dim); }
/* 投票（点赞打榜）按钮 */
.vote-btn {
  display: inline-flex; align-items: center; gap: 6px; padding: 8px 16px;
  border-radius: 50px; background: rgba(138,43,226,0.15);
  border: 1px solid var(--c-neon-purple); color: var(--c-text);
  font-size: .85rem; font-weight: 700; cursor: pointer; position: relative; transition: all .25s;
}
.vote-btn:hover { background: rgba(138,43,226,0.3); }
.vote-btn.voted { background: var(--grad-neon); color: #0A0A0A; border-color: transparent; }
.vote-count { font-variant-numeric: tabular-nums; }

/* 音符粒子飞散 */
.note-particle {
  position: fixed; font-size: 1.2rem; pointer-events: none; z-index: 9999;
  color: var(--c-electric-blue); animation: noteFly .9s ease-out forwards;
}
@keyframes noteFly {
  0% { opacity: 1; transform: translate(0,0) scale(1); }
  100% { opacity: 0; transform: translate(var(--dx), var(--dy)) scale(1.6); }
}

/* ===== 赛事分类导航（首页模块4） ===== */
.cat-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 20px; }
.cat-card {
  text-align: center; padding: 34px 18px; border-radius: var(--radius);
  background: var(--c-card); border: 1px solid rgba(138,43,226,0.25);
  transition: all .35s;
}
.cat-card:hover { transform: translateY(-6px); border-color: var(--c-electric-blue); box-shadow: 0 0 26px var(--c-purple-glow); }
.cat-card .ic { font-size: 2.4rem; margin-bottom: 14px; }
.cat-card h3 { font-size: 1.15rem; margin-bottom: 8px; }
.cat-card p { font-size: .88rem; color: var(--c-text-dim); }

/* ===== 评委阵容（首页模块5） ===== */
.judge-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 26px; }
.judge-card { text-align: center; }
.judge-avatar {
  width: 150px; height: 150px; border-radius: 50%; object-fit: cover; margin: 0 auto 16px;
  border: 3px solid transparent; background: var(--grad-neon); padding: 3px;
  box-shadow: 0 0 22px var(--c-purple-glow);
}
.judge-card h3 { font-size: 1.2rem; }
.judge-card .role { color: var(--c-electric-blue); font-size: .9rem; margin: 4px 0 12px; }
.judge-card blockquote {
  color: var(--c-text-dim); font-size: .92rem; font-style: italic;
  border-left: 3px solid var(--c-neon-purple); padding-left: 14px; text-align: left; margin: 0 auto; max-width: 280px;
}

/* ==========================================================================
   声望雷达图（组件4）
   ========================================================================== */
.radar-wrap { display: flex; flex-wrap: wrap; align-items: center; gap: 30px; justify-content: center; }
.radar-box { position: relative; }
canvas.radar { background: rgba(26,26,26,0.5); border-radius: var(--radius); }
.radar-legend { max-width: 320px; }
.radar-legend li { display: flex; justify-content: space-between; padding: 8px 0; border-bottom: 1px dashed rgba(138,43,226,0.3); }
.radar-legend .val { color: var(--c-electric-blue); font-weight: 700; }

/* ==========================================================================
   悬浮全局音乐播放器（组件1）
   ========================================================================== */
.global-player {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 950;
  background: rgba(16,16,20,0.94); backdrop-filter: blur(16px);
  border-top: 1px solid var(--c-neon-purple);
  box-shadow: 0 -6px 30px rgba(138,43,226,0.4);
  transform: translateY(100%); transition: transform .4s;
}
.global-player.show { transform: translateY(0); }
.gp-inner { max-width: var(--maxw); margin: 0 auto; display: flex; align-items: center; gap: 16px; padding: 12px 20px; }
.gp-cover { width: 52px; height: 52px; border-radius: 10px; object-fit: cover; flex-shrink: 0; box-shadow: 0 0 12px var(--c-purple-glow); }
.gp-meta { min-width: 120px; flex-shrink: 0; }
.gp-meta h4 { font-size: .95rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 160px; }
.gp-meta span { font-size: .8rem; color: var(--c-text-dim); }
.gp-btn {
  width: 44px; height: 44px; border-radius: 50%; border: none; cursor: pointer; flex-shrink: 0;
  background: var(--grad-neon); color: #0A0A0A; font-size: 1.1rem;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 0 14px var(--c-purple-glow);
}
/* 频谱可视化 */
.gp-spectrum { flex: 1; display: flex; align-items: flex-end; gap: 3px; height: 40px; min-width: 80px; }
.gp-spectrum span {
  flex: 1; background: var(--grad-neon); border-radius: 2px 2px 0 0; height: 20%;
  animation: spectrum 1s ease-in-out infinite;
}
.gp-spectrum.paused span { animation-play-state: paused; }
@keyframes spectrum { 0%,100% { height: 18%; } 50% { height: 95%; } }
.gp-progress { flex: 2; min-width: 100px; }
.gp-progress input { width: 100%; accent-color: var(--c-neon-purple); cursor: pointer; }
.gp-time { font-size: .78rem; color: var(--c-text-dim); font-variant-numeric: tabular-nums; min-width: 86px; text-align: right; }
.gp-close { background: none; border: none; color: var(--c-text-dim); font-size: 1.4rem; cursor: pointer; flex-shrink: 0; }
.gp-close:hover { color: var(--c-electric-blue); }

/* ==========================================================================
   页面 banner（栏目页/专题页通用）
   ========================================================================== */
.page-banner {
  position: relative; height: clamp(260px, 40vh, 380px);
  background-size: cover; background-position: center; display: flex; align-items: center;
}
.page-banner::before { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(10,10,10,0.5), rgba(10,10,10,0.9)); }
.page-banner .container { position: relative; }
.page-banner h1 {
  font-size: clamp(1.8rem, 4.5vw, 3rem); font-weight: 900; text-shadow: 0 0 30px var(--c-purple-glow);
}
.page-banner p { color: var(--c-text-dim); margin-top: 12px; max-width: 640px; }
.breadcrumb { font-size: .85rem; color: var(--c-text-dim); margin-bottom: 14px; }
.breadcrumb a:hover { color: var(--c-electric-blue); }

/* ===== 文本区块（五类文本） ===== */
.text-block { background: var(--c-card); border-radius: var(--radius); padding: 30px; border: 1px solid rgba(138,43,226,0.22); margin-bottom: 24px; }
.text-block h2 { font-size: 1.4rem; margin-bottom: 14px; color: var(--c-electric-blue); }
.text-block h3 { font-size: 1.1rem; margin: 18px 0 10px; }
.text-block p { color: var(--c-text-dim); margin-bottom: 12px; }
.text-block ul.dot { list-style: none; }
.text-block ul.dot li { padding-left: 22px; position: relative; color: var(--c-text-dim); margin-bottom: 8px; }
.text-block ul.dot li::before { content: "▹"; position: absolute; left: 0; color: var(--c-neon-purple); }
.compliance-note { font-size: .85rem; color: var(--c-text-dim); border-left: 3px solid var(--c-electric-blue); padding-left: 14px; }

/* ===== 表格 ===== */
.tbl { width: 100%; border-collapse: collapse; margin: 10px 0; }
.tbl th, .tbl td { padding: 12px 14px; text-align: left; border-bottom: 1px solid rgba(138,43,226,0.2); }
.tbl th { color: var(--c-electric-blue); font-weight: 700; }
.tbl tr:hover td { background: rgba(138,43,226,0.06); }

/* ===== 搜索页 ===== */
.search-box { display: flex; gap: 10px; max-width: 640px; margin: 0 auto 40px; }
.search-box input {
  flex: 1; padding: 14px 20px; border-radius: 50px; border: 1px solid var(--c-neon-purple);
  background: var(--c-card); color: var(--c-text); font-size: 1rem;
}
.search-box input:focus { outline: none; border-color: var(--c-electric-blue); box-shadow: 0 0 16px var(--c-blue-glow); }

/* ===== 错误页 ===== */
.error-wrap { text-align: center; padding: 80px 20px; }
.error-wrap h1 { font-size: clamp(4rem, 14vw, 9rem); font-weight: 900; background: var(--grad-neon); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; text-shadow: 0 0 40px var(--c-purple-glow); }
.error-wrap p { color: var(--c-text-dim); font-size: 1.1rem; margin: 10px 0 30px; }

/* ==========================================================================
   页脚
   ========================================================================== */
.site-footer { background: #060606; border-top: 1px solid rgba(138,43,226,0.3); padding: 56px 0 24px; margin-top: 40px; }
.footer-grid { display: grid; grid-template-columns: 1.6fr repeat(3, 1fr); gap: 36px; margin-bottom: 36px; }
.footer-grid h4 { color: var(--c-electric-blue); margin-bottom: 16px; font-size: 1rem; }
.footer-grid li { margin-bottom: 10px; }
.footer-grid a { color: var(--c-text-dim); font-size: .92rem; }
.footer-grid a:hover { color: var(--c-electric-blue); }
.footer-about p { color: var(--c-text-dim); font-size: .92rem; margin-top: 14px; }
.footer-bottom { text-align: center; color: var(--c-text-dim); font-size: .85rem; padding-top: 22px; border-top: 1px solid rgba(138,43,226,0.2); }
.footer-bottom a { color: var(--c-text-dim); }

/* ==========================================================================
   响应式
   ========================================================================== */
@media (max-width: 980px) {
  .grid-4 { grid-template-columns: repeat(2,1fr); }
  .cat-grid { grid-template-columns: repeat(2,1fr); }
  .judge-grid { grid-template-columns: 1fr; max-width: 380px; margin: 0 auto; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 760px) {
  .nav-links { display: none; }
  .nav-toggle { display: block; }
  .site-header.open .nav-links {
    display: flex; flex-direction: column; position: absolute; top: 70px; left: 0; right: 0;
    background: rgba(10,10,10,0.97); padding: 20px; gap: 18px; border-bottom: 1px solid var(--c-neon-purple);
  }
  .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .countdown-board { flex-direction: column; text-align: center; }
  .gp-meta, .gp-progress, .gp-time { display: none; }
  .gp-inner { gap: 10px; }
  .gp-spectrum { display: flex; }
}
@media (max-width: 480px) {
  .grid-4, .cat-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .cd-timer { flex-wrap: wrap; justify-content: center; }
}