/* ==========================================================================
   阿明歌 C 方案 · 商用音乐商城
   2026-08-31 立 · 设计师: 小青龙 AI
   配色：白底 + 阿明歌紫 #6D28D9 + CTA橙 #FF5722
   ========================================================================== */

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

:root {
  --color-primary: #6D28D9;
  --color-primary-dark: #5B21B6;
  --color-primary-light: #A78BFA;
  --color-cta: #FF5722;
  --color-cta-dark: #E64A19;
  --color-bg: #FFFFFF;
  --color-bg-alt: #F9FAFB;
  --color-bg-card: #FFFFFF;
  --color-border: #E5E7EB;
  --color-text: #111827;
  --color-text-light: #6B7280;
  --color-text-dim: #9CA3AF;
  --color-success: #10B981;
  --color-warn: #F59E0B;
  --color-error: #EF4444;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1);
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --font-sans: 'Inter', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
  --transition: all 0.2s ease;
}

body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

/* ===== Navbar ===== */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
}
.nav-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.navbar-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 20px;
}
.brand-icon { font-size: 28px; }
.brand-badge {
  font-size: 12px;
  padding: 2px 8px;
  background: var(--color-primary);
  color: white;
  border-radius: var(--radius-sm);
  font-weight: 500;
}
.nav-links {
  display: flex;
  gap: 24px;
}
.nav-link {
  color: var(--color-text-light);
  font-weight: 500;
  padding: 8px 0;
}
.nav-link:hover,
.nav-link.active {
  color: var(--color-primary);
}
.nav-link.active::after {
  content: '';
  display: block;
  height: 2px;
  background: var(--color-primary);
  margin-top: 4px;
}
.nav-actions {
  display: flex;
  gap: 12px;
}
.btn-secondary,
.btn-primary {
  padding: 8px 16px;
  border-radius: var(--radius-md);
  font-weight: 500;
  font-size: 14px;
}
.btn-secondary {
  background: var(--color-bg-alt);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}
.btn-secondary:hover {
  background: var(--color-bg);
  border-color: var(--color-primary);
}
.btn-primary {
  background: var(--color-primary);
  color: white;
}
.btn-primary:hover {
  background: var(--color-primary-dark);
}

/* ===== Hero ===== */
.hero {
  position: relative;
  padding: 80px 24px 100px;
  background: linear-gradient(135deg, #FAF5FF 0%, #FFFFFF 50%, #FFF7ED 100%);
  overflow: hidden;
}
.hero-bg-gradient {
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(109,40,217,0.15) 0%, transparent 70%);
  pointer-events: none;
}
.hero-container {
  max-width: 1280px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 400px;
  gap: 60px;
  align-items: center;
  position: relative;
}
.hero-badge {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(109,40,217,0.1);
  color: var(--color-primary);
  border-radius: var(--radius-lg);
  font-weight: 500;
  font-size: 14px;
  margin-bottom: 16px;
}
.hero-title {
  font-size: 56px;
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}
.highlight {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-cta) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-subtitle {
  font-size: 18px;
  color: var(--color-text-light);
  margin-bottom: 32px;
  line-height: 1.7;
}
.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 32px;
}
.stat-item {
  text-align: center;
  padding: 16px 8px;
  background: rgba(255,255,255,0.6);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
}
.stat-num {
  font-size: 28px;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1;
}
.stat-label {
  font-size: 12px;
  color: var(--color-text-light);
  margin-top: 4px;
}
.hero-cta {
  display: flex;
  gap: 16px;
  margin-bottom: 24px;
}
.btn-cta-primary,
.btn-cta-secondary {
  padding: 14px 32px;
  border-radius: var(--radius-lg);
  font-weight: 600;
  font-size: 16px;
  cursor: pointer;
  border: none;
  transition: var(--transition);
}
.btn-cta-primary {
  background: var(--color-cta);
  color: white;
  box-shadow: 0 4px 14px rgba(255,87,34,0.4);
}
.btn-cta-primary:hover {
  background: var(--color-cta-dark);
  transform: translateY(-2px);
}
.btn-cta-secondary {
  background: white;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}
.btn-cta-secondary:hover {
  background: var(--color-primary);
  color: white;
}
.hero-platforms {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.platform-tag {
  padding: 4px 12px;
  background: rgba(16,185,129,0.1);
  color: var(--color-success);
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 500;
}
.hero-visual {
  display: flex;
  justify-content: center;
}
.visual-card {
  background: white;
  border-radius: var(--radius-xl);
  padding: 32px;
  box-shadow: var(--shadow-xl);
  text-align: center;
  border: 2px solid var(--color-primary-light);
  width: 100%;
  max-width: 320px;
}
.visual-cover {
  width: 200px;
  height: 200px;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-cta) 100%);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 96px;
  margin: 0 auto 16px;
  color: white;
}
.visual-title {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 4px;
}
.visual-subtitle {
  font-size: 14px;
  color: var(--color-text-light);
  margin-bottom: 16px;
}
.visual-price {
  font-size: 32px;
  font-weight: 700;
  color: var(--color-cta);
}

/* ===== Section通用 ===== */
.section-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}
.section-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 32px;
}
.section-subtitle {
  color: var(--color-text-light);
  font-size: 16px;
  margin-top: 4px;
}
.section-title {
  font-size: 36px;
  font-weight: 700;
  letter-spacing: -0.01em;
}
.section-link {
  color: var(--color-primary);
  font-weight: 500;
}

/* ===== Filters ===== */
.filters-section {
  padding: 80px 0;
  background: var(--color-bg-alt);
}
.filter-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}
.filter-card {
  background: white;
  border-radius: var(--radius-lg);
  padding: 24px;
  border: 1px solid var(--color-border);
  transition: var(--transition);
}
.filter-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary-light);
}
.filter-icon {
  font-size: 32px;
  margin-bottom: 12px;
}
.filter-title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 12px;
}
.filter-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.filter-tag {
  padding: 4px 12px;
  background: var(--color-bg-alt);
  border-radius: var(--radius-sm);
  font-size: 13px;
  color: var(--color-text-light);
}

/* ===== Charts ===== */
.charts-section {
  padding: 80px 0;
}
.charts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
}
.chart-card {
  background: white;
  border-radius: var(--radius-lg);
  padding: 16px;
  border: 1px solid var(--color-border);
  cursor: pointer;
  transition: var(--transition);
}
.chart-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* ===== Songs ===== */
.songs-section {
  padding: 80px 0;
  background: var(--color-bg-alt);
}
.song-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 24px;
}
.song-card {
  background: white;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  transition: var(--transition);
  cursor: pointer;
  position: relative;
}
.song-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}
.song-cover {
  width: 100%;
  aspect-ratio: 1;
  background: linear-gradient(135deg, var(--color-primary-light), var(--color-primary));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 64px;
  color: white;
  position: relative;
}
.song-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.song-quality-badge {
  position: absolute;
  top: 8px;
  right: 8px;
  background: rgba(0,0,0,0.7);
  color: white;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  font-size: 12px;
  font-weight: 500;
}
.song-quality-badge.q-low { background: rgba(239,68,68,0.9); }
.song-quality-badge.q-mid { background: rgba(245,158,11,0.9); }
.song-quality-badge.q-high { background: rgba(16,185,129,0.9); }
.song-info {
  padding: 16px;
}
.song-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.song-meta {
  font-size: 13px;
  color: var(--color-text-light);
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.song-price {
  color: var(--color-cta);
  font-weight: 700;
  font-size: 16px;
}
.song-tags {
  display: flex;
  gap: 4px;
  margin-top: 8px;
  flex-wrap: wrap;
}
.song-tag {
  font-size: 11px;
  padding: 2px 8px;
  background: var(--color-bg-alt);
  color: var(--color-text-light);
  border-radius: var(--radius-sm);
}
.load-more {
  text-align: center;
  margin-top: 48px;
}
.btn-load-more {
  padding: 14px 32px;
  background: white;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
  border-radius: var(--radius-lg);
  font-weight: 600;
  font-size: 16px;
  cursor: pointer;
  transition: var(--transition);
}
.btn-load-more:hover {
  background: var(--color-primary);
  color: white;
}

/* ===== License ===== */
.license-section {
  padding: 80px 0;
}
.license-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
}
.license-card {
  text-align: center;
  padding: 32px 24px;
  background: white;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
}
.license-icon {
  font-size: 48px;
  margin-bottom: 16px;
}
.license-title {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 8px;
}
.license-desc {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.6;
}

/* ===== Amingge Banner ===== */
.amingge-section {
  padding: 80px 0;
  background: var(--color-bg-alt);
}
.amingge-banner {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  border-radius: var(--radius-xl);
  padding: 48px;
  display: flex;
  align-items: center;
  gap: 24px;
  color: white;
}
.banner-icon {
  font-size: 64px;
}
.banner-content {
  flex: 1;
}
.banner-title {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 4px;
}
.banner-desc {
  font-size: 16px;
  opacity: 0.9;
}
.banner-cta {
  background: white;
  color: var(--color-primary);
  padding: 14px 28px;
  border-radius: var(--radius-lg);
  font-weight: 600;
}

/* ===== Footer ===== */
.footer {
  background: #1F2937;
  color: #F3F4F6;
  padding: 60px 0 24px;
}
.footer-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 32px;
}
.footer-brand {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 8px;
}
.footer-tagline {
  color: #9CA3AF;
  font-size: 14px;
}
.footer-title {
  font-weight: 600;
  margin-bottom: 12px;
}
.footer-section a {
  display: block;
  color: #9CA3AF;
  font-size: 14px;
  margin-bottom: 8px;
}
.footer-section a:hover {
  color: white;
}
.footer-bottom {
  text-align: center;
  padding-top: 24px;
  border-top: 1px solid #374151;
  color: #6B7280;
  font-size: 13px;
}

/* ===== Loading state ===== */
.loading {
  background: var(--color-bg-alt);
  color: var(--color-text-light);
  text-align: center;
  padding: 40px;
  border-radius: var(--radius-lg);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .hero-container { grid-template-columns: 1fr; }
  .hero-title { font-size: 42px; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
  .footer-container { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .nav-links { display: none; }
  .hero { padding: 40px 16px 60px; }
  .hero-title { font-size: 32px; }
  .section-title { font-size: 24px; }
  .amingge-banner { flex-direction: column; text-align: center; padding: 24px; }
  .footer-container { grid-template-columns: 1fr; }
}