/* ===================================================================
 * 爱慕杰TVbox - iOS 27 Liquid Glassmorphism & High-End Minimalist Design System
 * =================================================================== */

:root {
  --bg-primary: #06070a;
  --bg-secondary: #0b0d13;
  --bg-tertiary: #12151e;
  
  --accent-cyan: #00e5ff;
  --accent-cyan-glow: rgba(0, 229, 255, 0.35);
  --accent-purple: #7928ca;
  --accent-pink: #ff0080;
  --accent-blue: #2563eb;
  
  --text-main: #f5f6f9;
  --text-muted: #8e95a5;
  --text-dim: #5c6270;
  
  --glass-bg: rgba(255, 255, 255, 0.04);
  --glass-bg-hover: rgba(255, 255, 255, 0.08);
  --glass-bg-active: rgba(255, 255, 255, 0.12);
  --glass-border: rgba(255, 255, 255, 0.14);
  --glass-border-hover: rgba(255, 255, 255, 0.28);
  --glass-specular: rgba(255, 255, 255, 0.45);
  --glass-shadow: 0 20px 48px -12px rgba(0, 0, 0, 0.65), 0 0 0 1px rgba(255, 255, 255, 0.07);
  --glass-blur: blur(28px) saturate(190%);
  
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-full: 9999px;
  
  --transition-fast: 0.18s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-smooth: 0.32s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-spring: 0.48s cubic-bezier(0.34, 1.56, 0.64, 1);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  -webkit-tap-highlight-color: transparent;
}

html, body {
  width: 100%;
  min-height: 100%;
  background-color: var(--bg-primary);
  color: var(--text-main);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  overflow-x: hidden;
}

/* Ambient dynamic mesh aura background */
.ambient-mesh {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
  opacity: 0.65;
}

.ambient-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(110px);
  opacity: 0.38;
  animation: floatOrb 22s ease-in-out infinite alternate;
}

.orb-cyan {
  width: 520px;
  height: 520px;
  background: radial-gradient(circle, #00e5ff 0%, rgba(0, 229, 255, 0) 70%);
  top: -120px;
  left: 15%;
}

.orb-purple {
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, #7928ca 0%, rgba(121, 40, 202, 0) 70%);
  bottom: -150px;
  right: 10%;
  animation-duration: 28s;
  animation-direction: alternate-reverse;
}

.orb-blue {
  width: 450px;
  height: 450px;
  background: radial-gradient(circle, #1d4ed8 0%, rgba(29, 78, 216, 0) 70%);
  top: 40%;
  left: 60%;
  animation-duration: 25s;
}

@keyframes floatOrb {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(45px, 35px) scale(1.08); }
  100% { transform: translate(-35px, -45px) scale(0.95); }
}

/* Layout Wrappers */
.app-container {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Top Navbar */
.glass-nav {
  position: sticky;
  top: 14px;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 24px;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-full);
  box-shadow: var(--glass-shadow);
  margin-bottom: 36px;
  transition: all var(--transition-smooth);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text-main);
}

.brand-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, #00e5ff 0%, #2563eb 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 14px var(--accent-cyan-glow);
}

.brand-icon svg {
  width: 20px;
  height: 20px;
  fill: #06070a;
}

.brand-title {
  font-size: 19px;
  font-weight: 800;
  letter-spacing: -0.4px;
  background: linear-gradient(180deg, #ffffff 30%, #a4adb9 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand-badge {
  font-size: 11px;
  font-weight: 600;
  padding: 2px 7px;
  border-radius: 6px;
  background: rgba(0, 229, 255, 0.14);
  color: var(--accent-cyan);
  border: 1px solid rgba(0, 229, 255, 0.3);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
  list-style: none;
}

.nav-link {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  padding: 8px 16px;
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
}

.nav-link:hover, .nav-link.active {
  color: var(--text-main);
  background: rgba(255, 255, 255, 0.07);
}

/* ===================================================================
 * iOS 27 Frosted Glassmorphism Button Component
 * =================================================================== */
.glass-btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 26px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.2px;
  color: #ffffff;
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-full);
  box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.5),
              inset 0 1px 1px 0 rgba(255, 255, 255, 0.35);
  cursor: pointer;
  text-decoration: none;
  overflow: hidden;
  transition: transform var(--transition-spring),
              box-shadow var(--transition-smooth),
              border-color var(--transition-smooth),
              background var(--transition-smooth);
}

/* Light specular sheen border */
.glass-btn::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(255, 255, 255, 0.22) 50%,
    transparent 100%
  );
  transform: skewX(-22deg);
  transition: left 0.7s cubic-bezier(0.16, 1, 0.3, 1);
  pointer-events: none;
}

/* Hover reactive glow */
.glass-btn:hover {
  transform: translateY(-2px) scale(1.02);
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--glass-border-hover);
  box-shadow: 0 16px 36px -10px rgba(0, 0, 0, 0.7),
              0 0 24px -4px var(--accent-cyan-glow),
              inset 0 1px 1.5px 0 rgba(255, 255, 255, 0.6);
}

.glass-btn:hover::before {
  left: 120%;
}

.glass-btn:active {
  transform: translateY(1px) scale(0.98);
  box-shadow: 0 6px 16px -4px rgba(0, 0, 0, 0.5),
              inset 0 1px 1px 0 rgba(255, 255, 255, 0.2);
}

/* Primary Cyan Glowing Glass Button */
.glass-btn-primary {
  background: linear-gradient(135deg, rgba(0, 229, 255, 0.28) 0%, rgba(37, 99, 235, 0.28) 100%);
  border: 1px solid rgba(0, 229, 255, 0.45);
  box-shadow: 0 12px 36px -8px var(--accent-cyan-glow),
              inset 0 1px 1.5px 0 rgba(255, 255, 255, 0.6);
}

.glass-btn-primary:hover {
  background: linear-gradient(135deg, rgba(0, 229, 255, 0.42) 0%, rgba(37, 99, 235, 0.42) 100%);
  border-color: rgba(0, 229, 255, 0.75);
  box-shadow: 0 18px 44px -8px rgba(0, 229, 255, 0.55),
              0 0 30px rgba(0, 229, 255, 0.4),
              inset 0 1px 2px 0 #ffffff;
}

/* Disabled / Coming Soon Glass Button */
.glass-btn-locked {
  background: rgba(255, 255, 255, 0.025);
  border-color: rgba(255, 255, 255, 0.09);
  color: var(--text-muted);
  cursor: not-allowed;
  box-shadow: none;
}

.glass-btn-locked:hover {
  transform: none;
  background: rgba(255, 255, 255, 0.025);
  border-color: rgba(255, 255, 255, 0.09);
  box-shadow: none;
}

/* Glass Card */
.glass-card {
  position: relative;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--glass-shadow);
  padding: 32px;
  overflow: hidden;
  transition: transform var(--transition-smooth),
              border-color var(--transition-smooth),
              box-shadow var(--transition-smooth);
}

.glass-card::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent 0%, rgba(255, 255, 255, 0.25) 50%, transparent 100%);
}

.glass-card:hover {
  transform: translateY(-4px);
  border-color: var(--glass-border-hover);
  box-shadow: 0 26px 54px -14px rgba(0, 0, 0, 0.75),
              0 0 28px -8px rgba(0, 229, 255, 0.25);
}

/* Hero Section */
.hero-section {
  text-align: center;
  padding: 40px 16px 56px;
  position: relative;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: var(--radius-full);
  background: rgba(0, 229, 255, 0.08);
  border: 1px solid rgba(0, 229, 255, 0.24);
  font-size: 13px;
  font-weight: 600;
  color: var(--accent-cyan);
  margin-bottom: 24px;
}

.hero-pill .pulse-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent-cyan);
  box-shadow: 0 0 8px var(--accent-cyan);
  animation: pulseDot 2s infinite;
}

@keyframes pulseDot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.85); }
}

.hero-title {
  font-size: 52px;
  font-weight: 850;
  letter-spacing: -1.2px;
  line-height: 1.15;
  margin-bottom: 18px;
  background: linear-gradient(180deg, #ffffff 40%, #9aa3b2 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 18px;
  color: var(--text-muted);
  max-width: 660px;
  margin: 0 auto 36px;
  line-height: 1.6;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* Platforms Grid (Download Cards) */
.platforms-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 64px;
}

.platform-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  height: 100%;
  min-height: 380px;
}

.platform-header {
  margin-bottom: 24px;
}

.platform-icon-wrap {
  width: 58px;
  height: 58px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
}

.platform-icon-wrap svg {
  width: 30px;
  height: 30px;
  fill: var(--text-main);
}

.platform-icon-android {
  background: rgba(0, 229, 255, 0.1);
  border-color: rgba(0, 229, 255, 0.25);
}
.platform-icon-android svg {
  fill: var(--accent-cyan);
}

.platform-icon-windows {
  background: rgba(37, 99, 235, 0.1);
  border-color: rgba(37, 99, 235, 0.25);
}
.platform-icon-windows svg {
  fill: #60a5fa;
}

.platform-icon-apple {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.2);
}

.platform-title {
  font-size: 22px;
  font-weight: 750;
  letter-spacing: -0.4px;
  margin-bottom: 6px;
}

.platform-desc {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.5;
  margin-bottom: 18px;
}

.platform-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
}

.platform-chip {
  font-size: 12px;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--text-muted);
}

.platform-chip.highlight {
  color: var(--accent-cyan);
  background: rgba(0, 229, 255, 0.06);
  border-color: rgba(0, 229, 255, 0.2);
}

.platform-footer {
  margin-top: auto;
}

.platform-footer .glass-btn {
  width: 100%;
}

.expected-badge {
  display: inline-block;
  padding: 5px 12px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: #ff9800;
  font-size: 12px;
  font-weight: 600;
  margin-bottom: 12px;
}

.ios-tip-text {
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.5;
  margin-bottom: 14px;
  text-align: center;
}

/* Feature Highlights Grid */
.section-title-wrap {
  text-align: center;
  margin-bottom: 40px;
}

.section-tag {
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--accent-cyan);
  margin-bottom: 8px;
}

.section-title {
  font-size: 32px;
  font-weight: 800;
  letter-spacing: -0.6px;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 64px;
}

.feature-box {
  padding: 24px;
  border-radius: var(--radius-md);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  backdrop-filter: var(--glass-blur);
}

.feature-icon {
  font-size: 26px;
  margin-bottom: 14px;
}

.feature-heading {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 8px;
}

.feature-text {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.55;
}

/* TV Installation Steps Accordion */
.guide-card {
  margin-bottom: 64px;
}

.guide-step {
  display: flex;
  gap: 20px;
  padding: 18px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
}

.guide-step:last-child {
  border-bottom: none;
}

.step-num {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(0, 229, 255, 0.1);
  border: 1px solid rgba(0, 229, 255, 0.3);
  color: var(--accent-cyan);
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.step-content h4 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 4px;
}

.step-content p {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.5;
}

/* Footer */
.footer-wrap {
  text-align: center;
  padding: 48px 0 32px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--text-dim);
  font-size: 13px;
}

.footer-wrap a {
  color: var(--text-muted);
  text-decoration: none;
}

/* ===================================================================
 * Responsive Design (Mobile / Tablet / Desktop)
 * =================================================================== */
@media (max-width: 960px) {
  .platforms-grid {
    grid-template-columns: 1fr;
    max-width: 520px;
    margin: 0 auto 48px;
  }
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .hero-title {
    font-size: 38px;
  }
}

@media (max-width: 640px) {
  .app-container {
    padding: 0 14px;
  }
  .glass-nav {
    padding: 10px 16px;
    top: 10px;
  }
  .nav-links {
    display: none; /* Mobile uses bottom bar or simplified header */
  }
  .hero-title {
    font-size: 30px;
  }
  .hero-subtitle {
    font-size: 15px;
  }
  .features-grid {
    grid-template-columns: 1fr;
  }
  .glass-card {
    padding: 22px 18px;
  }
}

/* ===================================================================
 * Light Mode Theme Definition (白昼模式)
 * =================================================================== */
[data-theme="light"] {
  --bg-primary: #f5f7fc;
  --bg-secondary: #ebf0f8;
  --bg-tertiary: #dfe6f1;

  --accent-cyan: #0284c7;
  --accent-cyan-glow: rgba(2, 132, 199, 0.25);
  --accent-purple: #7c3aed;
  --accent-blue: #2563eb;

  --text-main: #0f172a;
  --text-muted: #475569;
  --text-dim: #94a3b8;

  --glass-bg: rgba(255, 255, 255, 0.72);
  --glass-bg-hover: rgba(255, 255, 255, 0.9);
  --glass-bg-active: #ffffff;
  --glass-border: rgba(255, 255, 255, 0.95);
  --glass-border-hover: rgba(2, 132, 199, 0.35);
  --glass-specular: rgba(255, 255, 255, 0.95);
  --glass-shadow: 0 16px 36px -10px rgba(15, 23, 42, 0.08), 0 0 0 1px rgba(0, 0, 0, 0.05);
}

[data-theme="light"] body {
  background-color: var(--bg-primary);
  color: var(--text-main);
}

[data-theme="light"] .brand-title,
[data-theme="light"] .hero-title,
[data-theme="light"] .section-title {
  background: linear-gradient(180deg, #0f172a 30%, #334155 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

[data-theme="light"] .hero-subtitle,
[data-theme="light"] .platform-desc,
[data-theme="light"] .feature-text,
[data-theme="light"] .ios-tip-text,
[data-theme="light"] .step-content p {
  color: #475569;
}

[data-theme="light"] .platform-card,
[data-theme="light"] .guide-card,
[data-theme="light"] .feature-box,
[data-theme="light"] .glass-nav {
  background: rgba(255, 255, 255, 0.78);
  border-color: rgba(255, 255, 255, 0.95);
  box-shadow: 0 16px 36px -10px rgba(15, 23, 42, 0.07), 0 1px 3px rgba(0, 0, 0, 0.03);
}

[data-theme="light"] .platform-chip {
  background: rgba(0, 0, 0, 0.04);
  border-color: rgba(0, 0, 0, 0.08);
  color: #475569;
}

[data-theme="light"] .platform-chip.highlight {
  background: rgba(2, 132, 199, 0.08);
  border-color: rgba(2, 132, 199, 0.25);
  color: #0284c7;
}

[data-theme="light"] .hero-pill {
  background: rgba(2, 132, 199, 0.08);
  border-color: rgba(2, 132, 199, 0.25);
  color: #0284c7;
}

[data-theme="light"] .guide-step {
  border-bottom-color: rgba(0, 0, 0, 0.06);
}

[data-theme="light"] .footer-wrap {
  border-top-color: rgba(0, 0, 0, 0.08);
  color: #64748b;
}

[data-theme="light"] .glass-btn {
  color: #0f172a;
  background: rgba(255, 255, 255, 0.85);
  border: 1px solid rgba(0, 0, 0, 0.1);
  box-shadow: 0 8px 20px -6px rgba(15, 23, 42, 0.08), inset 0 1px 1px #fff;
}

[data-theme="light"] .glass-btn:hover {
  background: #ffffff;
  border-color: rgba(2, 132, 199, 0.4);
  box-shadow: 0 12px 28px -6px rgba(15, 23, 42, 0.12);
}

[data-theme="light"] .glass-btn-primary {
  color: #ffffff !important;
  background: linear-gradient(135deg, #0284c7 0%, #2563eb 100%) !important;
  border-color: transparent !important;
  box-shadow: 0 12px 28px -6px rgba(2, 132, 199, 0.45) !important;
}

[data-theme="light"] .glass-btn-primary:hover {
  background: linear-gradient(135deg, #0369a1 0%, #1d4ed8 100%) !important;
  box-shadow: 0 16px 36px -6px rgba(2, 132, 199, 0.6) !important;
}

[data-theme="light"] .orb-cyan {
  background: radial-gradient(circle, rgba(14, 165, 233, 0.22) 0%, rgba(14, 165, 233, 0) 70%);
}

[data-theme="light"] .orb-purple {
  background: radial-gradient(circle, rgba(168, 85, 247, 0.16) 0%, rgba(168, 85, 247, 0) 70%);
}

[data-theme="light"] .orb-blue {
  background: radial-gradient(circle, rgba(59, 130, 246, 0.16) 0%, rgba(59, 130, 246, 0) 70%);
}

/* ===================================================================
 * Theme Toggle Button Styles (白昼/黑夜交互按钮)
 * =================================================================== */
.theme-toggle-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: var(--radius-full);
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  color: var(--text-main);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  outline: none;
  transition: all var(--transition-smooth);
}

.theme-toggle-btn:hover {
  background: var(--glass-bg-hover);
  border-color: var(--glass-border-hover);
  transform: translateY(-1px);
}

.theme-toggle-btn .theme-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  transition: transform var(--transition-spring);
}

.theme-toggle-btn svg {
  width: 16px;
  height: 16px;
  fill: currentColor;
}

.theme-toggle-btn .icon-sun {
  display: none;
  color: #f59e0b;
}

.theme-toggle-btn .icon-moon {
  display: block;
  color: #00e5ff;
}

.theme-toggle-btn.is-light .icon-sun {
  display: block;
}

.theme-toggle-btn.is-light .icon-moon {
  display: none;
}