/* ==========================================================================
   一枝红杏机场首页 - 复古黑胶 / 音乐调音台风 (Vinyl Record & Mixing Console)
   Design System & Styling
   ========================================================================== */

:root {
  /* Vintage Vinyl & Console Palette */
  --color-vinyl-black: #0c0a09;
  --color-vinyl-groove: #161311;
  --color-chassis-dark: #1e1916;
  --color-chassis-card: #28221d;
  --color-chassis-border: #3d332a;
  --color-chassis-highlight: #524436;

  /* Warm Caramel & Amber Gold */
  --color-caramel: #c87424;
  --color-caramel-light: #e58d34;
  --color-amber-gold: #f5af4a;
  --color-gold-bright: #ffcf70;
  --color-gold-metallic: #d4af37;

  /* Retro Jazz Red & Warm Burgundy */
  --color-jazz-red: #a82424;
  --color-jazz-red-hover: #c93030;
  --color-jazz-red-glow: rgba(168, 36, 36, 0.45);

  /* Analog Meter & Paper Tones */
  --color-meter-bg: #f7f1e1;
  --color-meter-cream: #eedfc2;
  --color-meter-text: #2a221b;
  --color-parchment: #f9f5ec;

  /* Text Colors */
  --color-text-primary: #f5ede2;
  --color-text-secondary: #c2b5a5;
  --color-text-muted: #8c7e6f;
  --color-text-dark: #1b1612;

  /* LED Indicators */
  --led-green: #2ecc71;
  --led-green-glow: 0 0 10px rgba(46, 204, 113, 0.85);
  --led-amber: #f39c12;
  --led-amber-glow: 0 0 10px rgba(243, 156, 18, 0.85);
  --led-red: #e74c3c;
  --led-red-glow: 0 0 12px rgba(231, 76, 60, 0.95);

  /* Gradients & Textures */
  --grad-brass: linear-gradient(135deg, #eed07a 0%, #b8964d 50%, #7d6023 100%);
  --grad-caramel: linear-gradient(135deg, #f5af4a 0%, #c87424 50%, #994c0b 100%);
  --grad-chassis: linear-gradient(180deg, #2c251f 0%, #1a1613 100%);
  --grad-card: linear-gradient(160deg, #2b241e 0%, #1a1613 100%);
  --grad-fader-track: linear-gradient(180deg, #090807 0%, #1b1613 100%);

  /* Shadows */
  --shadow-chassis: 0 20px 50px rgba(0, 0, 0, 0.85), 0 0 0 1px rgba(212, 175, 55, 0.15);
  --shadow-vinyl: 0 25px 60px rgba(0, 0, 0, 0.95), 0 0 40px rgba(200, 116, 36, 0.2);
  --shadow-glow-gold: 0 0 25px rgba(245, 175, 74, 0.4);

  /* Typography */
  --font-display: 'Cinzel', 'Noto Serif SC', 'Songti SC', serif;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Courier New', monospace;

  /* Transitions */
  --trans-smooth: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  --trans-spring: all 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

/* Base Styles */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--color-vinyl-black);
  color: var(--color-text-primary);
  font-family: var(--font-sans);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body {
  overflow-x: hidden;
  position: relative;
  background: var(--color-vinyl-black);
  line-height: 1.6;
}

/* Background Atmosphere */
.ambient-canvas-wrapper {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 0;
  opacity: 0.65;
}

#bgWaveCanvas {
  width: 100%;
  height: 100%;
  display: block;
}

.ambient-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 1;
  background: 
    radial-gradient(circle at 20% 20%, rgba(200, 116, 36, 0.12) 0%, transparent 45%),
    radial-gradient(circle at 80% 60%, rgba(168, 36, 36, 0.08) 0%, transparent 40%),
    radial-gradient(circle at 50% 90%, rgba(245, 175, 74, 0.06) 0%, transparent 50%);
}

.page-container {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ==========================================================================
   Top Announcement Bar (吸引人的广告语与特色宣传)
   ========================================================================== */
.top-announcement {
  background: linear-gradient(90deg, #1f1813 0%, #3a1c14 50%, #1f1813 100%);
  border-bottom: 1px solid rgba(245, 175, 74, 0.25);
  color: var(--color-gold-bright);
  font-size: 0.88rem;
  padding: 10px 0;
  position: relative;
  z-index: 100;
  box-shadow: 0 2px 15px rgba(0,0,0,0.5);
}

.announcement-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

.announcement-badge {
  background: var(--color-jazz-red);
  color: #fff;
  padding: 2px 10px;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-right: 12px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  box-shadow: 0 0 10px var(--color-jazz-red-glow);
}

.announcement-content {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.announcement-text {
  color: var(--color-text-primary);
  font-weight: 500;
}

.announcement-highlight {
  color: var(--color-amber-gold);
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.announcement-cta {
  color: var(--color-parchment);
  background: rgba(200, 116, 36, 0.3);
  border: 1px solid var(--color-amber-gold);
  padding: 4px 14px;
  border-radius: 20px;
  text-decoration: none;
  font-size: 0.8rem;
  font-weight: 600;
  transition: var(--trans-smooth);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.announcement-cta:hover {
  background: var(--color-caramel);
  color: #fff;
  box-shadow: 0 0 15px rgba(200, 116, 36, 0.6);
  transform: translateY(-1px);
}

/* ==========================================================================
   Header & Nav Bar
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 90;
  background: rgba(14, 12, 10, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-chassis-border);
  box-shadow: 0 10px 30px rgba(0,0,0,0.6);
  transition: var(--trans-smooth);
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 80px;
  max-width: 1440px;
  width: 100%;
  margin: 0 auto;
  padding: 0 24px;
  gap: clamp(10px, 1.5vw, 24px);
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  flex-shrink: 0;
  white-space: nowrap;
}

.logo-vinyl-disc {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: radial-gradient(circle at center, #d4af37 12%, #8b1e1e 13%, #8b1e1e 32%, #111 33%, #222 36%, #111 40%, #333 44%, #111 50%, #222 65%, #050505 100%);
  box-shadow: 0 4px 12px rgba(0,0,0,0.8), 0 0 0 2px #44372c;
  position: relative;
  animation: spinSlow 8s linear infinite;
  flex-shrink: 0;
}

.logo-vinyl-center {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 10px;
  height: 10px;
  background: #000;
  border: 2px solid #ecd9be;
  border-radius: 50%;
}

.logo-text-group {
  display: flex;
  flex-direction: column;
  white-space: nowrap;
}

.logo-title {
  font-size: 1.28rem;
  font-weight: 800;
  color: var(--color-text-primary);
  font-family: var(--font-display);
  letter-spacing: 1.2px;
  background: linear-gradient(135deg, #fff 0%, #ecd9be 60%, #e58d34 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
}

.logo-tagline {
  font-size: 0.68rem;
  color: var(--color-amber-gold);
  letter-spacing: 2px;
  text-transform: uppercase;
  font-family: var(--font-mono);
  white-space: nowrap;
}

nav {
  display: flex;
  align-items: center;
  justify-content: center;
  flex: 1 1 auto;
  min-width: 0;
}

.nav-menu {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(4px, 0.8vw, 14px);
  list-style: none;
  flex-wrap: nowrap;
  white-space: nowrap;
  margin: 0;
  padding: 0;
}

.nav-menu li {
  white-space: nowrap;
  flex-shrink: 0;
  list-style: none;
}

.nav-link {
  color: var(--color-text-secondary);
  text-decoration: none;
  font-size: clamp(0.82rem, 0.86vw, 0.92rem);
  font-weight: 500;
  padding: 6px clamp(5px, 0.6vw, 10px);
  border-radius: 6px;
  transition: var(--trans-smooth);
  position: relative;
  white-space: nowrap;
  word-break: keep-all;
  display: inline-flex;
  align-items: center;
}

.nav-link:hover {
  color: var(--color-amber-gold);
  background: rgba(245, 175, 74, 0.08);
}

.nav-link.nav-kb-link {
  color: var(--color-gold-bright);
  border: 1px solid rgba(245, 175, 74, 0.35);
  background: rgba(200, 116, 36, 0.15);
  font-weight: 600;
  white-space: nowrap;
  word-break: keep-all;
}

.nav-link.nav-kb-link:hover {
  background: var(--color-caramel);
  color: #fff;
  border-color: var(--color-amber-gold);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
  white-space: nowrap;
}

.btn-brass-cta {
  background: var(--grad-brass);
  color: #1b1612;
  font-weight: 700;
  font-size: clamp(0.82rem, 0.86vw, 0.92rem);
  padding: 9px clamp(12px, 1.1vw, 20px);
  border-radius: 24px;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  box-shadow: 0 4px 15px rgba(212, 175, 55, 0.4), inset 0 1px 1px rgba(255,255,255,0.6);
  border: 1px solid #7d6023;
  transition: var(--trans-smooth);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  white-space: nowrap;
  word-break: keep-all;
  flex-shrink: 0;
}

.btn-brass-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 22px rgba(212, 175, 55, 0.65), 0 0 15px rgba(245, 175, 74, 0.5);
  color: #000;
}

.mobile-menu-toggle {
  display: none;
  background: transparent;
  border: none;
  color: var(--color-text-primary);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 4px;
  line-height: 1;
}

/* ==========================================================================
   Section 1: Hero 黑胶唱机 (Vinyl Turntable Deck & Hi-Fi Console)
   ========================================================================== */
.hero-section {
  padding: 60px 0 80px;
  position: relative;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 48px;
  align-items: center;
}

.hero-content {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.hero-badge-row {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.analog-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(30, 25, 22, 0.8);
  border: 1px solid var(--color-chassis-border);
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 0.8rem;
  font-family: var(--font-mono);
  color: var(--color-amber-gold);
  white-space: nowrap;
}

.tube-led {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--led-amber);
  box-shadow: var(--led-amber-glow);
  animation: pulseLed 2s infinite ease-in-out;
}

.hero-title {
  font-size: 3rem;
  line-height: 1.2;
  font-family: var(--font-display);
  font-weight: 800;
  color: #fff;
  letter-spacing: 0.5px;
}

.hero-title .highlight-red {
  color: var(--color-jazz-red-hover);
  text-shadow: 0 0 20px rgba(201, 48, 48, 0.4);
}

.hero-title .highlight-gold {
  background: linear-gradient(135deg, #ffcf70 0%, #e58d34 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-slogan-box {
  background: rgba(35, 29, 24, 0.6);
  border-left: 4px solid var(--color-caramel);
  padding: 16px 20px;
  border-radius: 0 8px 8px 0;
  backdrop-filter: blur(8px);
}

.hero-slogan-main {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--color-parchment);
  margin-bottom: 6px;
}

.hero-slogan-sub {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
}

.hero-stats-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  padding: 16px 0;
  border-top: 1px solid var(--color-chassis-border);
  border-bottom: 1px solid var(--color-chassis-border);
}

.hero-stat-item {
  display: flex;
  flex-direction: column;
}

.hero-stat-value {
  font-size: 1.7rem;
  font-weight: 800;
  font-family: var(--font-mono);
  color: var(--color-gold-bright);
}

.hero-stat-label {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.hero-cta-group {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.btn-hero-primary {
  background: linear-gradient(135deg, #a82424 0%, #c93030 50%, #8f1f1f 100%);
  color: #fff;
  font-size: 1.05rem;
  font-weight: 700;
  padding: 16px 36px;
  border-radius: 30px;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  box-shadow: 0 10px 25px rgba(168, 36, 36, 0.5), inset 0 1px 1px rgba(255,255,255,0.4);
  border: 1px solid rgba(255,255,255,0.2);
  transition: var(--trans-smooth);
  white-space: nowrap;
}

.btn-hero-primary:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 15px 35px rgba(201, 48, 48, 0.7);
}

.btn-hero-secondary {
  background: rgba(30, 25, 22, 0.9);
  color: var(--color-amber-gold);
  border: 1px solid var(--color-caramel);
  font-size: 1rem;
  font-weight: 600;
  padding: 15px 28px;
  border-radius: 30px;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: var(--trans-smooth);
  white-space: nowrap;
}

.btn-hero-secondary:hover {
  background: rgba(200, 116, 36, 0.2);
  color: #fff;
  border-color: var(--color-gold-bright);
}

/* ==========================================================================
   Hero Right: 3D Turntable Deck (拟物俯视黑胶唱机)
   ========================================================================== */
.turntable-deck-wrapper {
  position: relative;
  perspective: 1200px;
}

.turntable-deck {
  background: linear-gradient(145deg, #2c251f 0%, #151210 60%, #1c1815 100%);
  border: 3px solid #4a3d31;
  border-radius: 28px;
  padding: 30px;
  box-shadow: 
    0 30px 80px rgba(0,0,0,0.95),
    inset 0 2px 4px rgba(255,255,255,0.1),
    inset 0 -4px 8px rgba(0,0,0,0.8),
    0 0 30px rgba(200, 116, 36, 0.15);
  position: relative;
  overflow: hidden;
  transform-style: preserve-3d;
  transition: transform 0.5s ease;
}

/* Deck Screws */
.deck-screw {
  position: absolute;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: radial-gradient(circle, #e0c279 20%, #7d6023 80%);
  box-shadow: inset 0 1px 2px rgba(255,255,255,0.5), 0 2px 4px rgba(0,0,0,0.8);
}
.deck-screw::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 20%;
  width: 60%;
  height: 2px;
  background: #332612;
  transform: translateY(-50%) rotate(45deg);
}
.screw-tl { top: 16px; left: 16px; }
.screw-tr { top: 16px; right: 16px; }
.screw-bl { bottom: 16px; left: 16px; }
.screw-br { bottom: 16px; right: 16px; }

/* Deck Brass Nameplate */
.deck-nameplate {
  position: absolute;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, #eed07a 0%, #b8964d 50%, #856525 100%);
  color: #1a140b;
  padding: 4px 18px;
  border-radius: 4px;
  font-family: var(--font-display);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 2.5px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.7), inset 0 1px 1px rgba(255,255,255,0.6);
  border: 1px solid #5a4214;
  text-transform: uppercase;
}

/* Deck Layout: Platter & Tonearm */
.deck-stage {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 20px;
  position: relative;
  min-height: 380px;
}

/* Platter & Vinyl */
.platter-well {
  width: 320px;
  height: 320px;
  border-radius: 50%;
  background: radial-gradient(circle, #100e0c 40%, #1e1916 90%, #362c23 100%);
  box-shadow: inset 0 8px 25px rgba(0,0,0,0.9), 0 0 20px rgba(0,0,0,0.8);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.vinyl-record {
  width: 290px;
  height: 290px;
  border-radius: 50%;
  background: 
    repeating-radial-gradient(
      circle at center,
      #13100e 0px,
      #181512 2px,
      #100d0c 4px,
      #201b17 6px
    );
  box-shadow: 
    0 15px 35px rgba(0,0,0,0.9),
    0 0 0 3px #1f1a16;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: transform 0.2s linear;
}

/* Vinyl Sheen Overlay */
.vinyl-record::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  border-radius: 50%;
  background: conic-gradient(
    from 45deg,
    transparent 0deg,
    rgba(255, 255, 255, 0.08) 40deg,
    transparent 80deg,
    transparent 180deg,
    rgba(255, 255, 255, 0.08) 220deg,
    transparent 260deg,
    transparent 360deg
  );
  pointer-events: none;
}

.vinyl-center-label {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  background: radial-gradient(circle at center, #eed07a 15%, #a82424 20%, #701414 85%, #420b0b 100%);
  border: 2px solid #ecd9be;
  box-shadow: 0 4px 10px rgba(0,0,0,0.8);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 8px;
  position: relative;
  z-index: 2;
}

.label-brand {
  font-size: 0.62rem;
  font-weight: 800;
  color: #fff;
  letter-spacing: 1px;
}

.label-title {
  font-size: 0.52rem;
  color: var(--color-gold-bright);
  letter-spacing: 0.5px;
  margin-top: 2px;
}

.label-spindle-hole {
  width: 14px;
  height: 14px;
  background: radial-gradient(circle, #e0c279 30%, #30261a 90%);
  border-radius: 50%;
  border: 2px solid #1a1613;
  margin-top: 4px;
  box-shadow: inset 0 2px 4px rgba(0,0,0,0.9);
}

/* Spinning Class */
.vinyl-record.spinning {
  animation: spinVinyl 1.8s linear infinite;
}

.vinyl-record.spinning-fast {
  animation: spinVinyl 1.33s linear infinite;
}

@keyframes spinVinyl {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes spinSlow {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* Tonearm Assembly */
.tonearm-assembly {
  position: absolute;
  top: 15px;
  right: 25px;
  width: 110px;
  height: 280px;
  pointer-events: none;
  z-index: 10;
}

.tonearm-base {
  position: absolute;
  top: 20px;
  right: 15px;
  width: 54px;
  height: 54px;
  border-radius: 50%;
  background: radial-gradient(circle, #eed07a 20%, #7d6023 70%, #2b2010 100%);
  box-shadow: 0 6px 15px rgba(0,0,0,0.8), inset 0 1px 2px rgba(255,255,255,0.7);
  display: flex;
  align-items: center;
  justify-content: center;
}

.tonearm-pivot {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: #1c1712;
  border: 2px solid #ecd9be;
}

.tonearm-bar {
  position: absolute;
  top: 45px;
  right: 36px;
  width: 7px;
  height: 220px;
  background: linear-gradient(90deg, #d4af37 0%, #fff 40%, #7d6023 100%);
  border-radius: 3px;
  transform-origin: 3px 5px;
  transform: rotate(-15deg);
  transition: transform 1.2s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: -4px 8px 15px rgba(0,0,0,0.6);
}

.tonearm-headshell {
  position: absolute;
  bottom: 0;
  left: -8px;
  width: 22px;
  height: 38px;
  background: #a82424;
  border-radius: 4px;
  border: 1px solid #ecd9be;
  box-shadow: 0 2px 6px rgba(0,0,0,0.7);
  transform: rotate(18deg);
}

.tonearm-stylus {
  position: absolute;
  bottom: -4px;
  left: 8px;
  width: 4px;
  height: 8px;
  background: #eed07a;
  border-radius: 2px;
  box-shadow: 0 0 6px rgba(238, 208, 122, 0.8);
}

/* Tonearm Playing Position */
.tonearm-assembly.playing .tonearm-bar {
  transform: rotate(26deg);
}

/* Turntable Bottom Controls */
.deck-controls-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 25px;
  padding-top: 15px;
  border-top: 1px solid rgba(245, 175, 74, 0.2);
}

.deck-btn-group {
  display: flex;
  align-items: center;
  gap: 12px;
}

.deck-power-btn {
  background: linear-gradient(180deg, #3d3126 0%, #1a1511 100%);
  border: 2px solid #6b553e;
  border-radius: 50%;
  width: 44px;
  height: 44px;
  color: var(--color-amber-gold);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  box-shadow: 0 4px 10px rgba(0,0,0,0.7);
  transition: var(--trans-smooth);
}

.deck-power-btn.active {
  background: var(--color-jazz-red);
  color: #fff;
  border-color: #ff6b6b;
  box-shadow: 0 0 15px var(--color-jazz-red-glow);
}

.deck-speed-switch {
  display: flex;
  background: #14100d;
  border: 1px solid var(--color-chassis-border);
  border-radius: 20px;
  padding: 3px;
  gap: 4px;
}

.speed-opt {
  background: transparent;
  border: none;
  color: var(--color-text-muted);
  font-size: 0.75rem;
  font-family: var(--font-mono);
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 14px;
  cursor: pointer;
  transition: var(--trans-smooth);
}

.speed-opt.active {
  background: var(--color-caramel);
  color: #fff;
  box-shadow: 0 2px 8px rgba(200, 116, 36, 0.5);
}

.deck-audio-status {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  font-family: var(--font-mono);
  color: var(--color-gold-bright);
}

.needle-status-led {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #44372a;
}
.needle-status-led.on {
  background: var(--led-green);
  box-shadow: var(--led-green-glow);
}

/* ==========================================================================
   Section 2: 五段式均衡器 (EQ Faders) 调音台核心交互 & 演出门票生成
   ========================================================================== */
.mixer-console-section {
  padding: 80px 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 800px;
  margin: 0 auto 50px;
}

.section-pretitle {
  color: var(--color-amber-gold);
  font-size: 0.85rem;
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.section-title {
  font-size: 2.3rem;
  font-family: var(--font-display);
  font-weight: 800;
  color: #fff;
  line-height: 1.3;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--color-text-secondary);
  margin-top: 12px;
}

/* Mixing Console Chassis */
.mixer-chassis {
  background: linear-gradient(180deg, #27211a 0%, #15110e 100%);
  border: 3px solid #4a3a2b;
  border-radius: 20px;
  padding: 36px 32px;
  box-shadow: var(--shadow-chassis);
  position: relative;
}

/* Top VU Meters Rack */
.console-top-rack {
  display: grid;
  grid-template-columns: 1fr 1.6fr 1fr;
  gap: 24px;
  align-items: center;
  margin-bottom: 35px;
  padding-bottom: 25px;
  border-bottom: 2px solid rgba(245, 175, 74, 0.15);
}

/* Dual Analog VU Meters */
.vu-meter-box {
  background: var(--color-meter-bg);
  border: 4px solid #36291d;
  border-radius: 12px;
  padding: 12px;
  box-shadow: inset 0 4px 15px rgba(0,0,0,0.4), 0 5px 15px rgba(0,0,0,0.6);
  position: relative;
  overflow: hidden;
}

.vu-glass-sheen {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 50%;
  background: linear-gradient(180deg, rgba(255,255,255,0.45) 0%, rgba(255,255,255,0.05) 100%);
  pointer-events: none;
}

.vu-dial {
  height: 65px;
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  align-items: center;
}

.vu-scale {
  position: absolute;
  top: 5px;
  width: 90%;
  display: flex;
  justify-content: space-between;
  font-size: 0.65rem;
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--color-meter-text);
}

.scale-red {
  color: #c0392b;
}

.vu-needle {
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 2px;
  height: 60px;
  background: #c0392b;
  transform-origin: bottom center;
  transform: rotate(-35deg);
  transition: transform 0.15s cubic-bezier(0.2, 0.8, 0.3, 1);
  box-shadow: 1px 1px 3px rgba(0,0,0,0.5);
}

.vu-needle-pivot {
  position: absolute;
  bottom: -6px;
  left: 50%;
  transform: translateX(-50%);
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: #111;
  border: 2px solid #9c7c2b;
}

.vu-label {
  text-align: center;
  font-size: 0.68rem;
  font-family: var(--font-mono);
  font-weight: 800;
  color: #3b2e21;
  margin-top: 4px;
  letter-spacing: 1px;
}

/* Center Live Master Spectrum */
.master-spectrum-box {
  background: #0d0a08;
  border: 2px solid #3d3126;
  border-radius: 12px;
  padding: 14px 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.spectrum-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  font-family: var(--font-mono);
  color: var(--color-amber-gold);
}

.peak-indicator {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.75rem;
}

.peak-led {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #441a17;
  transition: var(--trans-smooth);
}

.peak-led.lit {
  background: var(--led-red);
  box-shadow: var(--led-red-glow);
  animation: flashPeak 0.3s alternate infinite;
}

@keyframes flashPeak {
  from { opacity: 0.6; }
  to { opacity: 1; }
}

.spectrum-bars {
  display: flex;
  align-items: flex-end;
  height: 48px;
  gap: 5px;
}

.spec-bar {
  flex: 1;
  background: linear-gradient(180deg, #e74c3c 0%, #f39c12 25%, #2ecc71 70%);
  border-radius: 2px;
  height: 35%;
  transition: height 0.1s ease;
}

/* EQ Faders Grid (五段式推子) */
.eq-faders-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
  background: rgba(18, 14, 11, 0.85);
  border: 1px solid var(--color-chassis-border);
  border-radius: 16px;
  padding: 30px 24px;
}

.fader-channel {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  position: relative;
}

.channel-tag {
  font-size: 0.72rem;
  font-family: var(--font-mono);
  color: var(--color-amber-gold);
  background: #251e18;
  padding: 3px 8px;
  border-radius: 4px;
  border: 1px solid #4a3b2e;
}

.channel-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: #fff;
  text-align: center;
}

.channel-value-badge {
  font-size: 0.82rem;
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--color-gold-bright);
  background: #14100c;
  padding: 2px 10px;
  border-radius: 12px;
  border: 1px solid #5a4533;
  min-width: 75px;
  text-align: center;
}

/* Fader Track & Knob */
.fader-track-wrapper {
  position: relative;
  height: 240px;
  width: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.fader-scale-ticks {
  position: absolute;
  left: 0;
  top: 0;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  font-size: 0.62rem;
  font-family: var(--font-mono);
  color: var(--color-text-muted);
  pointer-events: none;
}

.fader-track {
  width: 8px;
  height: 200px;
  background: var(--grad-fader-track);
  border-radius: 4px;
  border: 1px solid #3a2e24;
  position: relative;
  box-shadow: inset 0 2px 6px rgba(0,0,0,0.9);
}

.fader-fill {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 50%;
  background: linear-gradient(180deg, var(--color-amber-gold) 0%, var(--color-caramel) 100%);
  border-radius: 0 0 4px 4px;
  pointer-events: none;
}

.fader-input-range {
  position: absolute;
  width: 200px;
  height: 50px;
  opacity: 0;
  transform: rotate(-90deg);
  cursor: pointer;
  z-index: 10;
}

/* Realistic Knurled Fader Knob */
.fader-knob {
  position: absolute;
  left: 50%;
  transform: translate(-50%, 50%);
  width: 38px;
  height: 50px;
  background: linear-gradient(180deg, #44372c 0%, #221c17 40%, #15110d 60%, #30261e 100%);
  border: 2px solid #7d6023;
  border-radius: 5px;
  box-shadow: 0 6px 15px rgba(0,0,0,0.9), inset 0 1px 1px rgba(255,255,255,0.4);
  pointer-events: none;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: bottom 0.05s linear;
  bottom: 50%;
}

.knob-stripe {
  width: 28px;
  height: 3px;
  background: #eed07a;
  box-shadow: 0 0 8px rgba(238, 208, 122, 0.9);
  border-radius: 1px;
}

.fader-desc {
  font-size: 0.76rem;
  color: var(--color-text-secondary);
  text-align: center;
  line-height: 1.4;
  height: 36px;
}

/* ==========================================================================
   Generated VIP Concert Pass (复古演出门票 / 音乐通行证)
   ========================================================================== */
.ticket-reveal-zone {
  margin-top: 45px;
  perspective: 1000px;
}

.ticket-wrapper {
  background: linear-gradient(135deg, #1f1812 0%, #2b2016 50%, #18130e 100%);
  border: 2px dashed #b8964d;
  border-radius: 16px;
  padding: 30px;
  box-shadow: 0 20px 50px rgba(0,0,0,0.9), 0 0 35px rgba(200, 116, 36, 0.25);
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 30px;
  position: relative;
  overflow: hidden;
  transition: var(--trans-spring);
}

.ticket-cutout-top, .ticket-cutout-bottom {
  position: absolute;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: #15110e;
  border: 2px solid #4a3a2b;
}
.ticket-cutout-top {
  top: -14px;
  right: 33.3%;
}
.ticket-cutout-bottom {
  bottom: -14px;
  right: 33.3%;
}

.ticket-main-info {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.ticket-badge-row {
  display: flex;
  align-items: center;
  gap: 12px;
}

.ticket-category-tag {
  background: var(--color-jazz-red);
  color: #fff;
  font-size: 0.72rem;
  font-weight: 800;
  padding: 3px 10px;
  border-radius: 3px;
  letter-spacing: 1px;
  text-transform: uppercase;
}

.ticket-serial {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--color-amber-gold);
}

.ticket-headline {
  font-size: 1.6rem;
  font-family: var(--font-display);
  font-weight: 800;
  color: #fff;
}

.ticket-specs-bar {
  display: flex;
  gap: 20px;
  background: rgba(14, 11, 8, 0.7);
  padding: 12px 18px;
  border-radius: 8px;
  border: 1px solid #443528;
}

.spec-cell {
  display: flex;
  flex-direction: column;
}

.spec-cell-label {
  font-size: 0.7rem;
  color: var(--color-text-muted);
}

.spec-cell-value {
  font-size: 1.15rem;
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--color-gold-bright);
}

.ticket-punch-col {
  border-left: 2px dashed #6b553e;
  padding-left: 25px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  gap: 14px;
}

.ticket-barcode-wrap {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}

.barcode-svg {
  width: 100%;
  max-width: 180px;
  height: 48px;
  filter: invert(0.9) sepia(0.8) saturate(3) hue-rotate(350deg);
}

.barcode-text {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--color-text-muted);
  letter-spacing: 2px;
}

.btn-ticket-redeem {
  background: var(--grad-brass);
  color: #120e0a;
  font-weight: 800;
  font-size: 1rem;
  padding: 12px 28px;
  border-radius: 25px;
  text-decoration: none;
  box-shadow: 0 8px 20px rgba(212, 175, 55, 0.5);
  border: 1px solid #826628;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: var(--trans-smooth);
  width: 100%;
  justify-content: center;
}

.btn-ticket-redeem:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 28px rgba(245, 175, 74, 0.7);
  color: #000;
}

/* ==========================================================================
   Section 3: 节点延迟和状态板块 (Analog Rack Channel Status)
   ========================================================================== */
.nodes-status-section {
  padding: 80px 0;
  position: relative;
}

.rack-chassis-container {
  background: linear-gradient(180deg, #221c17 0%, #13100d 100%);
  border: 3px solid #4a3a2a;
  border-radius: 18px;
  padding: 24px;
  box-shadow: var(--shadow-chassis);
}

.rack-unit-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 18px;
  margin-bottom: 20px;
  border-bottom: 1px solid rgba(245, 175, 74, 0.2);
}

.rack-title-area {
  display: flex;
  align-items: center;
  gap: 12px;
}

.rack-model-tag {
  background: #36281c;
  border: 1px solid #6b553d;
  color: var(--color-amber-gold);
  font-size: 0.75rem;
  font-family: var(--font-mono);
  padding: 3px 8px;
  border-radius: 4px;
}

.btn-refresh-ping {
  background: rgba(30, 24, 19, 0.9);
  border: 1px solid var(--color-caramel);
  color: var(--color-amber-gold);
  padding: 6px 14px;
  border-radius: 6px;
  font-size: 0.82rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  transition: var(--trans-smooth);
}

.btn-refresh-ping:hover {
  background: var(--color-caramel);
  color: #fff;
}

.nodes-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.node-card {
  background: linear-gradient(160deg, #1d1814 0%, #110e0b 100%);
  border: 1px solid #3d3023;
  border-radius: 12px;
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: var(--trans-smooth);
  position: relative;
  overflow: hidden;
}

.node-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-amber-gold);
  box-shadow: 0 10px 25px rgba(0,0,0,0.8), 0 0 15px rgba(200, 116, 36, 0.2);
}

.node-top-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.node-flag-group {
  display: flex;
  align-items: center;
  gap: 8px;
}

.node-flag {
  font-size: 1.25rem;
}

.node-name {
  font-size: 0.98rem;
  font-weight: 700;
  color: #fff;
}

.node-status-led {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: var(--led-green);
}

.led-indicator-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--led-green);
  box-shadow: var(--led-green-glow);
}

.node-specs-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  background: #0d0a08;
  padding: 10px;
  border-radius: 8px;
  border: 1px solid #2a2118;
}

.node-spec-item {
  display: flex;
  flex-direction: column;
  text-align: center;
}

.node-spec-val {
  font-size: 0.95rem;
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--color-gold-bright);
}

.node-spec-label {
  font-size: 0.68rem;
  color: var(--color-text-muted);
}

.node-tags-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.node-mini-tag {
  font-size: 0.68rem;
  background: rgba(45, 34, 25, 0.7);
  color: var(--color-text-secondary);
  padding: 2px 6px;
  border-radius: 4px;
  border: 1px solid #443223;
}

/* ==========================================================================
   Section 4: 套餐价格板块 (Vinyl Editions / VIP Plans)
   ========================================================================== */
.pricing-section {
  padding: 80px 0;
  position: relative;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}

.pricing-card {
  background: linear-gradient(165deg, #241e18 0%, #14110e 100%);
  border: 1px solid #4a3a2a;
  border-radius: 18px;
  padding: 28px 22px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: var(--trans-smooth);
}

.pricing-card:hover {
  transform: translateY(-6px);
  border-color: var(--color-amber-gold);
  box-shadow: 0 20px 40px rgba(0,0,0,0.9), 0 0 25px rgba(200, 116, 36, 0.25);
}

.pricing-card.featured {
  border: 2px solid var(--color-amber-gold);
  background: linear-gradient(165deg, #32251a 0%, #1a140f 100%);
  box-shadow: 0 15px 40px rgba(0,0,0,0.9), 0 0 25px rgba(245, 175, 74, 0.3);
}

.featured-ribbon {
  position: absolute;
  top: -12px;
  right: 20px;
  background: var(--grad-brass);
  color: #120e0a;
  font-size: 0.72rem;
  font-weight: 800;
  padding: 3px 12px;
  border-radius: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.6);
}

.plan-vinyl-icon {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: radial-gradient(circle, #eed07a 15%, #a82424 25%, #15110e 30%, #30261e 100%);
  margin-bottom: 16px;
  box-shadow: 0 4px 10px rgba(0,0,0,0.7);
}

.plan-title {
  font-size: 1.25rem;
  font-family: var(--font-display);
  font-weight: 800;
  color: #fff;
}

.plan-subtitle {
  font-size: 0.8rem;
  color: var(--color-amber-gold);
  margin-bottom: 16px;
}

.plan-price-wrap {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid rgba(245, 175, 74, 0.15);
}

.price-currency {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-gold-bright);
}

.price-num {
  font-size: 2.3rem;
  font-weight: 900;
  font-family: var(--font-mono);
  color: #fff;
}

.price-period {
  font-size: 0.82rem;
  color: var(--color-text-muted);
}

.plan-features-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 28px;
  flex-grow: 1;
}

.plan-feature-item {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--color-text-secondary);
}

.feature-check {
  color: var(--color-amber-gold);
  font-weight: 800;
  flex-shrink: 0;
}

.btn-plan-select {
  background: rgba(30, 24, 18, 0.9);
  color: var(--color-amber-gold);
  border: 1px solid var(--color-caramel);
  font-weight: 700;
  font-size: 0.92rem;
  padding: 12px;
  border-radius: 20px;
  text-decoration: none;
  text-align: center;
  transition: var(--trans-smooth);
}

.btn-plan-select:hover {
  background: var(--color-caramel);
  color: #fff;
  box-shadow: 0 4px 15px rgba(200, 116, 36, 0.5);
}

.pricing-card.featured .btn-plan-select {
  background: var(--grad-brass);
  color: #15110e;
  border: none;
  box-shadow: 0 4px 15px rgba(212, 175, 55, 0.4);
}

.pricing-card.featured .btn-plan-select:hover {
  background: var(--color-gold-bright);
  box-shadow: 0 8px 25px rgba(245, 175, 74, 0.7);
}

/* ==========================================================================
   Section 5: 核心优势板块 (Audiophile Hi-Fi Network Tech)
   ========================================================================== */
.features-section {
  padding: 80px 0;
  position: relative;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  background: linear-gradient(160deg, #221c17 0%, #13100d 100%);
  border: 1px solid #3d3023;
  border-radius: 16px;
  padding: 28px;
  transition: var(--trans-smooth);
  position: relative;
  overflow: hidden;
}

.feature-card:hover {
  transform: translateY(-5px);
  border-color: var(--color-caramel);
  box-shadow: 0 15px 35px rgba(0,0,0,0.8), 0 0 20px rgba(200, 116, 36, 0.15);
}

.feature-icon-badge {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  background: linear-gradient(135deg, #3a2b1e 0%, #1f1711 100%);
  border: 1px solid var(--color-amber-gold);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: var(--color-amber-gold);
  margin-bottom: 20px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.6);
}

.feature-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 10px;
  font-family: var(--font-display);
}

.feature-desc {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* ==========================================================================
   Section 6: 用户评价板块 (Listener Reviews / 发烧友留声墙)
   ========================================================================== */
.reviews-section {
  padding: 80px 0;
  position: relative;
}

.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.review-card {
  background: linear-gradient(160deg, #241e17 0%, #13100c 100%);
  border: 1px solid #443527;
  border-radius: 16px;
  padding: 26px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 16px;
  transition: var(--trans-smooth);
}

.review-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-amber-gold);
  box-shadow: 0 12px 30px rgba(0,0,0,0.85);
}

.review-stars {
  color: var(--color-amber-gold);
  font-size: 0.95rem;
  letter-spacing: 2px;
}

.review-text {
  font-size: 0.95rem;
  color: var(--color-parchment);
  line-height: 1.6;
  font-style: italic;
}

.review-user-info {
  display: flex;
  align-items: center;
  gap: 12px;
  border-top: 1px solid rgba(245, 175, 74, 0.15);
  padding-top: 14px;
}

.user-avatar-disc {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: radial-gradient(circle, #eed07a 20%, #a82424 50%, #1a140f 100%);
  border: 1px solid #eed07a;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 0.8rem;
  color: #fff;
}

.user-name-title {
  display: flex;
  flex-direction: column;
}

.reviewer-name {
  font-size: 0.92rem;
  font-weight: 700;
  color: #fff;
}

.reviewer-role {
  font-size: 0.75rem;
  color: var(--color-amber-gold);
}

/* ==========================================================================
   Section 7: 常见问题板块 (FAQ Accordion)
   ========================================================================== */
.faq-section {
  padding: 80px 0;
  position: relative;
}

.faq-list {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.faq-item {
  background: linear-gradient(180deg, #221c17 0%, #15110e 100%);
  border: 1px solid #3d3023;
  border-radius: 12px;
  overflow: hidden;
  transition: var(--trans-smooth);
}

.faq-item.active {
  border-color: var(--color-caramel);
  box-shadow: 0 8px 25px rgba(0,0,0,0.7);
}

.faq-question-btn {
  width: 100%;
  text-align: left;
  background: transparent;
  border: none;
  padding: 20px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  color: #fff;
  font-size: 1.05rem;
  font-weight: 600;
}

.faq-toggle-icon {
  font-size: 1.2rem;
  color: var(--color-amber-gold);
  transition: transform 0.3s ease;
}

.faq-item.active .faq-toggle-icon {
  transform: rotate(45deg);
}

.faq-answer-panel {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease-out;
  padding: 0 24px;
  color: var(--color-text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
}

.faq-item.active .faq-answer-panel {
  padding-bottom: 20px;
}

/* ==========================================================================
   Section 8: 知识库与教程板块 (要求：首页不放长文内容，单独划板块引导跳转)
   ========================================================================== */
.kb-landing-portal {
  padding: 80px 0 100px;
  position: relative;
}

.kb-portal-card {
  background: linear-gradient(135deg, #271f18 0%, #362218 50%, #1a140f 100%);
  border: 2px solid var(--color-amber-gold);
  border-radius: 24px;
  padding: 50px 40px;
  box-shadow: 0 25px 60px rgba(0,0,0,0.9), 0 0 40px rgba(200, 116, 36, 0.25);
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 40px;
  align-items: center;
  position: relative;
  overflow: hidden;
}

.portal-text-group {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.portal-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(200, 116, 36, 0.2);
  border: 1px solid var(--color-amber-gold);
  padding: 4px 14px;
  border-radius: 20px;
  font-size: 0.78rem;
  color: var(--color-gold-bright);
  font-family: var(--font-mono);
  width: fit-content;
}

.portal-title {
  font-size: 2.2rem;
  font-family: var(--font-display);
  font-weight: 800;
  color: #fff;
  line-height: 1.3;
}

.portal-desc {
  font-size: 1.05rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.portal-features-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.portal-feature-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  color: var(--color-parchment);
}

.btn-enter-kb {
  background: var(--grad-brass);
  color: #15110e;
  font-weight: 800;
  font-size: 1.05rem;
  padding: 16px 36px;
  border-radius: 30px;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  width: fit-content;
  box-shadow: 0 8px 25px rgba(212, 175, 55, 0.5);
  transition: var(--trans-smooth);
}

.btn-enter-kb:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 35px rgba(245, 175, 74, 0.7);
  color: #000;
}

.portal-visual-mock {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.mock-article-preview {
  background: rgba(20, 16, 12, 0.85);
  border: 1px solid #4a3a2b;
  border-radius: 12px;
  padding: 14px 18px;
  display: flex;
  align-items: center;
  gap: 14px;
  box-shadow: 0 4px 15px rgba(0,0,0,0.5);
}

.mock-article-preview:nth-child(2) {
  transform: translateX(-15px);
  border-color: var(--color-caramel);
}

.mock-article-icon {
  font-size: 1.4rem;
  color: var(--color-amber-gold);
}

.mock-article-info {
  display: flex;
  flex-direction: column;
}

.mock-article-title {
  font-size: 0.92rem;
  font-weight: 700;
  color: #fff;
}

.mock-article-meta {
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  background: #090706;
  border-top: 1px solid var(--color-chassis-border);
  padding: 60px 0 30px;
  position: relative;
}

.footer-top {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand-col {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.footer-slogan {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.footer-links-col {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-col-title {
  font-size: 0.95rem;
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--color-gold-bright);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.footer-links-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-link {
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: 0.88rem;
  transition: var(--trans-smooth);
}

.footer-link:hover {
  color: var(--color-amber-gold);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 25px;
  border-top: 1px solid rgba(245, 175, 74, 0.1);
  font-size: 0.82rem;
  color: var(--color-text-muted);
}

/* ==========================================================================
   Animations
   ========================================================================== */
@keyframes pulseLed {
  0%, 100% { opacity: 0.7; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.15); }
}

/* ==========================================================================
   Responsive Adaptations
   ========================================================================== */
@media (max-width: 1240px) {
  .header-inner {
    padding: 0 16px;
    gap: 10px;
  }
  .logo-title {
    font-size: 1.15rem;
  }
  .nav-menu {
    gap: 3px;
  }
  .nav-link {
    font-size: 0.8rem;
    padding: 5px 6px;
  }
  .btn-brass-cta {
    font-size: 0.8rem;
    padding: 8px 12px;
  }
}

@media (max-width: 1060px) {
  .nav-menu {
    display: none;
  }
  .mobile-menu-toggle {
    display: block;
  }
}

@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .nodes-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .reviews-grid {
    grid-template-columns: 1fr;
  }
  .kb-portal-card {
    grid-template-columns: 1fr;
  }
  .footer-top {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .hero-title {
    font-size: 2.2rem;
  }
  .console-top-rack {
    grid-template-columns: 1fr;
  }
  .eq-faders-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .ticket-wrapper {
    grid-template-columns: 1fr;
  }
  .ticket-punch-col {
    border-left: none;
    border-top: 2px dashed #6b553e;
    padding-left: 0;
    padding-top: 20px;
  }
  .nodes-grid {
    grid-template-columns: 1fr;
  }
  .pricing-grid {
    grid-template-columns: 1fr;
  }
  .features-grid {
    grid-template-columns: 1fr;
  }
  .footer-top {
    grid-template-columns: 1fr;
  }
  .footer-bottom {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }
}