/* ==========================================================================
   夜煞云 (Night Fury Cloud) - 官方极简推广落地页样式库
   Cosmic-Cinema Widescreen Streaming UI Design
   Pure Native CSS | Zero Framework | High Performance | Instant Load
   ========================================================================== */

/* 1. CSS 变量定义 (Design Tokens) */
:root {
  /* 默认：白天模式 (Light Mode) */
  --bg-primary: #f8fafc;
  --bg-surface: #ffffff;
  --bg-surface-elevated: #ffffff;
  --bg-subtle: #f1f5f9;
  --bg-accent-soft: rgba(112, 26, 117, 0.08);

  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;

  --border-subtle: #e2e8f0;
  --border-medium: #cbd5e1;
  --border-focus: #701a75;

  --brand-primary: #701a75;
  --brand-primary-hover: #581c87;
  --brand-secondary: #4f46e5;
  --brand-gradient: linear-gradient(135deg, #701a75 0%, #4f46e5 50%, #2563eb 100%);
  --brand-gradient-hover: linear-gradient(135deg, #581c87 0%, #4338ca 50%, #1d4ed8 100%);
  --brand-glow: rgba(112, 26, 117, 0.22);

  /* Cosmic-Cinema 剧场专属色盘 (Nocturnal Theater Palette) */
  --cinema-bg: #130f26;
  --cinema-surface: #1a1532;
  --cinema-nebula: #701a75;
  --cinema-nebula-glow: rgba(112, 26, 117, 0.45);
  --cinema-magenta: #d946ef;
  --cinema-bezel: #090714;
  --cinema-screen-border: rgba(217, 70, 239, 0.25);
  --cinema-white-wave: #f8fafc;

  --card-shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.06), 0 2px 6px -1px rgba(15, 23, 42, 0.03);
  --card-shadow-hover: 0 16px 36px -4px rgba(112, 26, 117, 0.16), 0 6px 12px -2px rgba(15, 23, 42, 0.04);
  --elevated-shadow: 0 20px 40px -8px rgba(15, 23, 42, 0.08);

  --glass-bg: rgba(255, 255, 255, 0.86);
  --glass-border: rgba(226, 232, 240, 0.85);

  --badge-bg: rgba(112, 26, 117, 0.09);
  --badge-text: #701a75;

  --accent-green: #10b981;
  --accent-green-bg: rgba(16, 185, 129, 0.1);
  --accent-amber: #f59e0b;
  --accent-purple: #9333ea;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-full: 9999px;

  --container-max: 1220px;
  --transition-normal: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-theme: background-color 0.35s ease, color 0.35s ease, border-color 0.35s ease, box-shadow 0.35s ease;
}

/* 2. 黑夜模式 (Dark Mode) */
[data-theme="dark"] {
  --bg-primary: #0b0914;
  --bg-surface: #120e22;
  --bg-surface-elevated: #1b1633;
  --bg-subtle: #16112c;
  --bg-accent-soft: rgba(217, 70, 239, 0.12);

  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  --border-subtle: #241d3b;
  --border-medium: #3b3058;
  --border-focus: #c026d3;

  --brand-primary: #c026d3;
  --brand-primary-hover: #a21caf;
  --brand-secondary: #818cf8;
  --brand-gradient: linear-gradient(135deg, #c026d3 0%, #701a75 50%, #4f46e5 100%);
  --brand-gradient-hover: linear-gradient(135deg, #a21caf 0%, #581c87 50%, #4338ca 100%);
  --brand-glow: rgba(192, 38, 211, 0.32);

  --cinema-white-wave: #0b0914;

  --card-shadow: 0 4px 20px -2px rgba(0, 0, 0, 0.6), 0 2px 6px -1px rgba(0, 0, 0, 0.4);
  --card-shadow-hover: 0 16px 36px -4px rgba(192, 38, 211, 0.28), 0 6px 16px -2px rgba(0, 0, 0, 0.5);
  --elevated-shadow: 0 20px 45px -8px rgba(0, 0, 0, 0.7);

  --glass-bg: rgba(18, 14, 34, 0.88);
  --glass-border: rgba(59, 48, 88, 0.6);

  --badge-bg: rgba(192, 38, 211, 0.18);
  --badge-text: #f0abfc;

  --accent-green: #34d399;
  --accent-green-bg: rgba(52, 211, 153, 0.15);
  --accent-amber: #fbbf24;
  --accent-purple: #c084fc;
}

/* 3. 基础与重置样式 */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  scroll-padding-top: 86px; /* 页面锚点跳转顶部偏移量 */
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: var(--transition-theme);
  overflow-x: hidden;
}

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

img, svg {
  vertical-align: middle;
  max-width: 100%;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  outline: none;
}

ul, ol {
  list-style: none;
}

/* 4. 容器与排版工具类 */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 92px 0;
  position: relative;
}

.section-alt {
  background-color: var(--bg-subtle);
  transition: var(--transition-theme);
}

.section-header {
  text-align: center;
  max-width: 820px;
  margin: 0 auto 58px auto;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--badge-text);
  background: var(--badge-bg);
  border-radius: var(--radius-full);
  margin-bottom: 16px;
  letter-spacing: 0.5px;
  border: 1px solid rgba(112, 26, 117, 0.16);
}

.badge-pulse {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--accent-green);
  box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
  animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
  0% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.6); }
  70% { box-shadow: 0 0 0 8px rgba(16, 185, 129, 0); }
  100% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

.section-title {
  font-size: 2.35rem;
  font-weight: 850;
  line-height: 1.25;
  color: var(--text-primary);
  margin-bottom: 16px;
  letter-spacing: -0.6px;
}

.section-subtitle {
  font-size: 1.08rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* 5. 顶层暗夜剧场导航栏 (Cosmic Theater Navbar) */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(19, 15, 38, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(112, 26, 117, 0.28);
  transition: var(--transition-theme);
  height: 74px;
  display: flex;
  align-items: center;
}

.navbar-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.35rem;
  font-weight: 850;
  color: #ffffff;
  letter-spacing: -0.3px;
}

.logo-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, #701a75 0%, #d946ef 60%, #3b82f6 100%);
  border-radius: 11px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  box-shadow: 0 4px 16px rgba(217, 70, 239, 0.4);
}

.brand-badge {
  font-size: 0.68rem;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  background: rgba(217, 70, 239, 0.2);
  color: #f0abfc;
  font-weight: 700;
  margin-left: 5px;
  vertical-align: middle;
  border: 1px solid rgba(217, 70, 239, 0.3);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-link {
  font-size: 0.93rem;
  font-weight: 500;
  color: rgba(248, 250, 252, 0.78);
  position: relative;
  padding: 6px 2px;
}

.nav-link:hover, .nav-link.active {
  color: #ffffff;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background: linear-gradient(90deg, #d946ef, #38bdf8);
  transition: width 0.25s ease;
  border-radius: 2px;
}

.nav-link:hover::after {
  width: 100%;
}

/* 推荐资讯特殊微高亮胶囊 */
.nav-link-highlight {
  color: #f0abfc !important;
  font-weight: 600;
  background: rgba(112, 26, 117, 0.35);
  padding: 5px 12px;
  border-radius: var(--radius-full);
  border: 1px solid rgba(217, 70, 239, 0.35);
}

.nav-link-highlight:hover {
  background: rgba(112, 26, 117, 0.6);
  box-shadow: 0 0 12px rgba(217, 70, 239, 0.35);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

/* 6. 精致透明化昼夜模式切换按钮 */
.theme-toggle-btn {
  position: relative;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.16);
  color: #f8fafc;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
  transition: var(--transition-normal);
  backdrop-filter: blur(8px);
}

.theme-toggle-btn:hover {
  color: #ffffff;
  border-color: rgba(217, 70, 239, 0.6);
  background: rgba(217, 70, 239, 0.2);
  transform: translateY(-1px);
  box-shadow: 0 0 16px rgba(217, 70, 239, 0.4);
}

.theme-toggle-btn svg {
  width: 20px;
  height: 20px;
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.3s ease;
  position: absolute;
}

.sun-icon {
  opacity: 1;
  transform: rotate(0deg) scale(1);
}

.moon-icon {
  opacity: 0;
  transform: rotate(90deg) scale(0.5);
}

[data-theme="dark"] .sun-icon {
  opacity: 0;
  transform: rotate(-90deg) scale(0.5);
}

[data-theme="dark"] .moon-icon {
  opacity: 1;
  transform: rotate(0deg) scale(1);
}

/* 7. 按钮组件与极简白胶囊 (Stark White Pills) */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 24px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: var(--transition-normal);
  white-space: nowrap;
  user-select: none;
}

/* Stark White Pill (主视觉区与页眉纯白胶囊按钮) */
.btn-cinema-white {
  background: #ffffff;
  color: #130f26 !important;
  font-weight: 750;
  border-radius: var(--radius-full);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.35), 0 0 24px rgba(255, 255, 255, 0.4);
}

.btn-cinema-white:hover {
  background: #f1f5f9;
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.45), 0 0 32px rgba(255, 255, 255, 0.6);
  color: #090714 !important;
}

.btn-primary {
  background: var(--brand-gradient);
  color: #ffffff;
  box-shadow: 0 4px 16px var(--brand-glow);
}

.btn-primary:hover {
  background: var(--brand-gradient-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px var(--brand-glow);
  color: #ffffff;
}

.btn-secondary {
  background: var(--bg-surface);
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
  box-shadow: var(--card-shadow);
}

.btn-secondary:hover {
  border-color: var(--brand-primary);
  color: var(--brand-primary);
  transform: translateY(-2px);
}

.btn-cinema-outline {
  background: rgba(255, 255, 255, 0.08);
  color: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: var(--radius-full);
  backdrop-filter: blur(8px);
}

.btn-cinema-outline:hover {
  background: rgba(255, 255, 255, 0.16);
  border-color: rgba(255, 255, 255, 0.5);
  transform: translateY(-2px);
  color: #ffffff;
}

.btn-lg {
  padding: 15px 34px;
  font-size: 1.05rem;
}

.btn-full {
  width: 100%;
}

.btn-icon {
  transition: transform 0.2s ease;
}

.btn:hover .btn-icon {
  transform: translateX(4px);
}

/* 8. 移动端汉堡菜单按钮 */
.mobile-menu-btn {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: #ffffff;
  background: rgba(255, 255, 255, 0.08);
}

/* 9. Cosmic-Cinema 剧场级主视觉区 (Widescreen Theater Hero) */
.hero-cosmic {
  background-color: var(--cinema-bg);
  background-image: 
    radial-gradient(circle at 75% 35%, rgba(112, 26, 117, 0.65) 0%, transparent 60%),
    radial-gradient(circle at 20% 20%, rgba(79, 70, 229, 0.35) 0%, transparent 50%),
    radial-gradient(circle at 50% 90%, rgba(217, 70, 239, 0.2) 0%, transparent 45%);
  padding: 80px 0 0 0;
  position: relative;
  overflow: hidden;
  color: #ffffff;
  transition: background-color 0.5s ease;
}

/* 背景星云环境微暗调 (Ambient Theater-Dimming) */
.hero-cosmic::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(10, 8, 20, 0);
  pointer-events: none;
  transition: background 0.6s ease;
  z-index: 1;
}

.hero-cosmic.theater-dimmed::before {
  background: rgba(10, 8, 20, 0.45);
}

.hero-widescreen-grid {
  display: grid;
  grid-template-columns: 1.25fr 1fr;
  gap: 40px;
  align-items: center;
  position: relative;
  z-index: 2;
  margin-bottom: 50px;
}

/* 左侧文案列 */
.hero-left-column {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  min-width: 0;
}

.hero-spec-pill {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 7px 18px;
  background: rgba(112, 26, 117, 0.4);
  border: 1px solid rgba(217, 70, 239, 0.4);
  border-radius: var(--radius-full);
  font-size: 0.88rem;
  font-weight: 700;
  color: #fdf4ff;
  margin-bottom: 22px;
  box-shadow: 0 0 20px rgba(112, 26, 117, 0.3);
}

.hero-spec-pill strong {
  color: #38bdf8;
  font-weight: 850;
  letter-spacing: 0.5px;
}

.hero-cosmic-title {
  font-size: clamp(1.85rem, 2.7vw, 2.75rem);
  font-weight: 900;
  line-height: 1.25;
  letter-spacing: -0.8px;
  color: #ffffff;
  margin-bottom: 20px;
  white-space: nowrap;
}

.hero-brand-highlight {
  background: linear-gradient(135deg, #ffffff 0%, #f0abfc 50%, #d946ef 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline;
}

.hero-cosmic-subtitle {
  font-size: 1.12rem;
  color: rgba(248, 250, 252, 0.85);
  line-height: 1.75;
  margin-bottom: 34px;
  max-width: 560px;
}

.hero-cta-wrap {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 38px;
  flex-wrap: wrap;
}

/* 核心特性简明横条 */
.hero-mini-badges {
  display: flex;
  align-items: center;
  gap: 20px;
  padding-top: 18px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  width: 100%;
}

.mini-badge-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: rgba(248, 250, 252, 0.75);
}

.mini-badge-item svg {
  color: var(--accent-green);
}

/* 右侧 4K 剧场视界卡片 (Panoramic Theater Viewport) */
.hero-right-theater {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

/* 漂浮紫色星云天体 (Floating Celestial Orbs) */
.celestial-orb {
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
  filter: blur(40px);
  z-index: 1;
}

.orb-1 {
  width: 220px;
  height: 220px;
  background: rgba(217, 70, 239, 0.35);
  top: -30px;
  right: -20px;
  animation: float-orb-1 8s ease-in-out infinite alternate;
}

.orb-2 {
  width: 180px;
  height: 180px;
  background: rgba(112, 26, 117, 0.55);
  bottom: -20px;
  left: -20px;
  animation: float-orb-2 9s ease-in-out infinite alternate;
}

@keyframes float-orb-1 {
  0% { transform: translateY(0px) scale(1); }
  100% { transform: translateY(-24px) scale(1.12); }
}

@keyframes float-orb-2 {
  0% { transform: translateY(0px) scale(1); }
  100% { transform: translateY(20px) scale(1.08); }
}

/* 剧场超薄边框屏幕 (Ultra-Thin Bezel Panoramic Theater Viewport) */
.theater-viewport {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: 580px;
  background: var(--cinema-bezel);
  border: 1.5px solid var(--cinema-screen-border);
  border-radius: var(--radius-xl);
  padding: 14px;
  box-shadow: 
    0 24px 60px -12px rgba(0, 0, 0, 0.7),
    0 0 35px rgba(112, 26, 117, 0.35);
  transition: all 0.45s cubic-bezier(0.16, 1, 0.3, 1);
  overflow: hidden;
}

/* 悬停微交互：聚光紫品红光晕 & 弹簧回弹 */
.theater-viewport:hover {
  transform: translateY(-8px) scale(1.02);
  border-color: rgba(217, 70, 239, 0.75);
  box-shadow: 
    0 30px 80px -10px rgba(0, 0, 0, 0.85),
    0 0 50px rgba(217, 70, 239, 0.5),
    0 0 80px rgba(112, 26, 117, 0.6);
}

/* 屏幕顶部实况遥测条 (Live Bitrate Telemetry HUD) */
.theater-hud-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 14px 12px 14px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.7);
}

.telemetry-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.telemetry-badge {
  background: rgba(217, 70, 239, 0.22);
  color: #f0abfc;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  font-weight: 750;
  font-size: 0.74rem;
  border: 1px solid rgba(217, 70, 239, 0.35);
}

.telemetry-bitrate {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-weight: 700;
  color: #38bdf8;
  display: flex;
  align-items: center;
  gap: 5px;
}

.telemetry-right {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.75rem;
}

.telemetry-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent-green);
  box-shadow: 0 0 8px var(--accent-green);
}

/* 屏幕视界播放内容仿真 (Panoramic Cinema Screen Display) */
.theater-screen-display {
  position: relative;
  width: 100%;
  height: 290px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: 
    linear-gradient(135deg, rgba(19, 15, 38, 0.85) 0%, rgba(112, 26, 117, 0.65) 50%, rgba(10, 8, 20, 0.95) 100%),
    radial-gradient(circle at 60% 40%, rgba(217, 70, 239, 0.5) 0%, transparent 60%);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 20px;
}

/* 屏幕内流光网格与光柱 */
.screen-cosmic-grid {
  position: absolute;
  inset: 0;
  background-image: 
    linear-gradient(rgba(217, 70, 239, 0.1) 1px, transparent 1px),
    linear-gradient(90deg, rgba(217, 70, 239, 0.1) 1px, transparent 1px);
  background-size: 32px 32px;
  opacity: 0.5;
  pointer-events: none;
}

.screen-brand-tags {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.stream-logo-pills {
  display: flex;
  gap: 8px;
}

.stream-pill {
  font-size: 0.72rem;
  font-weight: 800;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  background: rgba(0, 0, 0, 0.65);
  color: #ffffff;
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  font-family: inherit;
}

.stream-pill:hover, .stream-pill.active {
  transform: translateY(-2px);
}

.stream-pill.netflix { color: #ff4b55; border-color: rgba(229, 9, 20, 0.4); }
.stream-pill.netflix:hover, .stream-pill.netflix.active {
  border-color: #e50914;
  box-shadow: 0 0 16px rgba(229, 9, 20, 0.65);
  background: rgba(229, 9, 20, 0.25);
}

.stream-pill.disney { color: #38bdf8; border-color: rgba(56, 189, 248, 0.4); }
.stream-pill.disney:hover, .stream-pill.disney.active {
  border-color: #38bdf8;
  box-shadow: 0 0 16px rgba(56, 189, 248, 0.65);
  background: rgba(56, 189, 248, 0.25);
}

.stream-pill.youtube { color: #f43f5e; border-color: rgba(244, 63, 94, 0.4); }
.stream-pill.youtube:hover, .stream-pill.youtube.active {
  border-color: #f43f5e;
  box-shadow: 0 0 16px rgba(244, 63, 94, 0.65);
  background: rgba(244, 63, 94, 0.25);
}

/* 屏幕画板画布 (Stream Canvas) */
.screen-stream-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 1;
}

.theater-screen-link {
  display: block;
  text-decoration: none;
  color: inherit;
  cursor: pointer;
}

/* 中央响应式弹簧力学脉冲播放环 (Spring Physics Play Ring) */
.theater-play-center {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 3;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  cursor: pointer;
  text-decoration: none;
}

.play-ring-button {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: #ffffff;
  color: #701a75;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 
    0 0 0 8px rgba(217, 70, 239, 0.35),
    0 0 28px rgba(255, 255, 255, 0.7);
  transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.3s ease;
  cursor: pointer;
}

.theater-viewport:hover .play-ring-button {
  transform: scale(1.15);
  box-shadow: 
    0 0 0 14px rgba(217, 70, 239, 0.5),
    0 0 42px rgba(255, 255, 255, 0.95);
  color: #581c87;
}

.play-ring-button:active {
  transform: scale(0.92) !important;
}

/* 正在串流中激波雷达环光晕 */
.play-ring-button.streaming {
  background: linear-gradient(135deg, #ffffff 0%, #fdf4ff 100%);
  animation: radar-pulse 1.3s cubic-bezier(0.24, 0, 0.38, 1) infinite;
}

@keyframes radar-pulse {
  0% {
    box-shadow: 0 0 0 0 rgba(217, 70, 239, 0.8), 0 0 30px rgba(255, 255, 255, 0.9);
  }
  60% {
    box-shadow: 0 0 0 24px rgba(217, 70, 239, 0), 0 0 50px rgba(255, 255, 255, 1);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(217, 70, 239, 0), 0 0 30px rgba(255, 255, 255, 0.9);
  }
}

.play-ring-button svg {
  margin-left: 3px;
}

/* 动态音频均衡器波形动画 */
.equalizer-bars {
  display: flex;
  align-items: flex-end;
  gap: 3.5px;
  height: 24px;
}

.equalizer-bars span {
  width: 4px;
  height: 100%;
  background: #701a75;
  border-radius: 2px;
  animation: eq-bounce 0.7s ease-in-out infinite alternate;
}

.equalizer-bars span:nth-child(1) { animation-delay: 0.1s; }
.equalizer-bars span:nth-child(2) { animation-delay: 0.35s; }
.equalizer-bars span:nth-child(3) { animation-delay: 0.18s; }
.equalizer-bars span:nth-child(4) { animation-delay: 0.42s; }

@keyframes eq-bounce {
  0% { height: 5px; }
  100% { height: 24px; }
}

.play-live-label {
  font-size: 0.82rem;
  font-weight: 750;
  color: #ffffff;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.9);
  letter-spacing: 0.6px;
  display: flex;
  align-items: center;
  gap: 7px;
  background: rgba(0, 0, 0, 0.55);
  padding: 4px 14px;
  border-radius: var(--radius-full);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.18);
  transition: all 0.3s ease;
}

.play-live-label:hover {
  background: rgba(217, 70, 239, 0.35);
  border-color: rgba(217, 70, 239, 0.6);
  box-shadow: 0 0 16px rgba(217, 70, 239, 0.5);
}

.live-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent-green);
  box-shadow: 0 0 8px var(--accent-green);
}

/* 交互反馈提示条 */
.theater-click-toast {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 11px 16px;
  margin-top: 12px;
  border-radius: var(--radius-md);
  background: rgba(217, 70, 239, 0.16);
  border: 1px solid rgba(217, 70, 239, 0.38);
  color: #fdf4ff;
  font-size: 0.84rem;
  font-weight: 650;
  backdrop-filter: blur(8px);
  transition: all 0.3s ease;
  cursor: pointer;
}

.theater-click-toast:hover {
  background: rgba(217, 70, 239, 0.28);
  border-color: rgba(217, 70, 239, 0.65);
  box-shadow: 0 0 18px rgba(217, 70, 239, 0.35);
}

.screen-bottom-meta {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.8) 0%, transparent 100%);
  margin: -10px -20px -20px -20px;
  padding: 16px 20px;
}

.screen-title-text {
  font-size: 0.96rem;
  font-weight: 750;
  color: #ffffff;
}

.screen-sub-text {
  font-size: 0.78rem;
  color: rgba(255, 255, 255, 0.7);
}

.screen-stats-chips {
  display: flex;
  gap: 8px;
}

.stat-chip {
  font-size: 0.72rem;
  font-weight: 600;
  background: rgba(255, 255, 255, 0.15);
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  color: #ffffff;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.stat-chip-cta {
  background: linear-gradient(135deg, #d946ef 0%, #3b82f6 100%);
  color: #ffffff !important;
  text-decoration: none;
  font-weight: 750;
  cursor: pointer;
  box-shadow: 0 0 12px rgba(217, 70, 239, 0.45);
  transition: all 0.25s ease;
  border: 1px solid rgba(255, 255, 255, 0.3);
}

.stat-chip-cta:hover {
  transform: translateY(-1px) scale(1.05);
  box-shadow: 0 0 18px rgba(217, 70, 239, 0.7);
  color: #ffffff;
}

.theater-click-toast.active-streaming {
  background: rgba(16, 185, 129, 0.2);
  border-color: rgba(16, 185, 129, 0.55);
  color: #a7f3d0;
  box-shadow: 0 0 20px rgba(16, 185, 129, 0.35);
}

/* 10. 标志性白波浪过渡分割线 (White Wave Transition Divider) */
.cinema-wave-divider {
  position: relative;
  width: 100%;
  overflow: hidden;
  line-height: 0;
  z-index: 3;
}

.cinema-wave-divider svg {
  position: relative;
  display: block;
  width: calc(100% + 1.3px);
  height: 80px;
  transform: rotate(180deg);
}

.cinema-wave-divider .shape-fill {
  fill: var(--cinema-white-wave);
  transition: fill 0.35s ease;
}

/* 11. "为你量身定制的服务" 核心优势区 (Below the White Wave) */
.service-intro-section {
  background-color: var(--cinema-white-wave);
  padding: 30px 0 88px 0;
  transition: var(--transition-theme);
}

.service-intro-header {
  text-align: center;
  max-width: 800px;
  margin: 0 auto 52px auto;
}

.service-intro-title {
  font-size: 2.5rem;
  font-weight: 900;
  letter-spacing: -0.6px;
  color: var(--text-primary);
  margin-bottom: 16px;
}

.title-accent-word {
  color: var(--brand-primary);
  position: relative;
  display: inline-block;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.feature-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: 38px 30px;
  box-shadow: var(--card-shadow);
  transition: var(--transition-normal);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--brand-gradient);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.feature-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-medium);
  box-shadow: var(--card-shadow-hover);
}

.feature-card:hover::before {
  opacity: 1;
}

.feature-icon-wrapper {
  width: 58px;
  height: 58px;
  border-radius: var(--radius-md);
  background: var(--bg-accent-soft);
  color: var(--brand-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
}

.feature-card-title {
  font-size: 1.3rem;
  font-weight: 750;
  color: var(--text-primary);
  margin-bottom: 12px;
  letter-spacing: -0.3px;
}

.feature-card-desc {
  font-size: 0.96rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 20px;
  flex-grow: 1;
}

.feature-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: auto;
}

.tag {
  font-size: 0.78rem;
  font-weight: 600;
  padding: 4px 10px;
  background: var(--bg-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  border: 1px solid var(--border-subtle);
}

/* 12. 流媒体图卡展示 (Streaming Cards) */
.streaming-container {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 40px;
  align-items: center;
}

.streaming-info h3 {
  font-size: 2.1rem;
  font-weight: 850;
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}

.streaming-info p {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 28px;
}

.streaming-feature-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 32px;
}

.streaming-feature-item {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.98rem;
  color: var(--text-primary);
  font-weight: 500;
}

.check-icon {
  width: 20px;
  height: 20px;
  color: var(--accent-green);
  flex-shrink: 0;
}

.streaming-cards-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}

.stream-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 22px;
  box-shadow: var(--card-shadow);
  transition: var(--transition-normal);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.stream-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-medium);
  box-shadow: var(--card-shadow-hover);
}

.stream-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.stream-brand-name {
  font-weight: 750;
  font-size: 1.05rem;
  margin: 0;
}

.stream-status-pill {
  font-size: 0.75rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  background: var(--accent-green-bg);
  color: var(--accent-green);
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.stream-card-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.stream-speed-indicator {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 6px;
  padding-top: 10px;
  border-top: 1px dashed var(--border-subtle);
  font-size: 0.8rem;
  color: var(--text-muted);
}

.stream-speed-val {
  font-weight: 750;
  color: var(--brand-primary);
}

/* 13. AI 支持图卡展示 (AI Support Cards) */
.ai-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.ai-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 26px 20px;
  box-shadow: var(--card-shadow);
  transition: var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.ai-card:hover {
  transform: translateY(-5px);
  border-color: var(--border-focus);
  box-shadow: var(--card-shadow-hover);
}

.ai-card-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  font-size: 1.25rem;
  font-weight: 800;
  background: var(--bg-accent-soft);
  color: var(--brand-primary);
}

.ai-card-title {
  font-size: 1.15rem;
  font-weight: 750;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.ai-card-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.55;
  margin-bottom: 16px;
  flex-grow: 1;
}

.ai-card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.78rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border-subtle);
  padding-top: 12px;
}

.ai-status {
  color: var(--accent-green);
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 4px;
}

/* 14. 真实套餐价格对比表 (Real-world Pricing Table) */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: 38px 30px;
  box-shadow: var(--card-shadow);
  transition: var(--transition-normal);
  display: flex;
  flex-direction: column;
  position: relative;
}

.pricing-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--card-shadow-hover);
}

.pricing-card.featured {
  border: 2px solid var(--brand-primary);
  box-shadow: 0 12px 36px var(--brand-glow);
  transform: scale(1.03);
  z-index: 2;
}

.pricing-card.featured:hover {
  transform: scale(1.03) translateY(-6px);
}

.pricing-popular-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--brand-gradient);
  color: #ffffff;
  font-size: 0.78rem;
  font-weight: 750;
  padding: 4px 18px;
  border-radius: var(--radius-full);
  box-shadow: 0 4px 14px var(--brand-glow);
  letter-spacing: 0.5px;
}

.pricing-tier-name {
  font-size: 1.4rem;
  font-weight: 850;
  margin-bottom: 8px;
}

.pricing-tier-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 24px;
  min-height: 42px;
}

.pricing-price-wrap {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 26px;
}

.currency {
  font-size: 1.5rem;
  font-weight: 750;
  color: var(--brand-primary);
}

.price-number {
  font-size: 3.2rem;
  font-weight: 900;
  color: var(--text-primary);
  line-height: 1;
  letter-spacing: -1.2px;
}

.price-period {
  font-size: 0.95rem;
  color: var(--text-muted);
}

.pricing-features-list {
  display: flex;
  flex-direction: column;
  gap: 13px;
  margin-bottom: 32px;
  flex-grow: 1;
}

.pricing-feature-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.93rem;
  color: var(--text-secondary);
}

.pricing-feature-item strong {
  color: var(--text-primary);
}

.pricing-tip {
  text-align: center;
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-top: 14px;
}

/* 15. 用户评价 (Testimonials) */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.review-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 26px;
  box-shadow: var(--card-shadow);
  transition: var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.review-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-medium);
  box-shadow: var(--card-shadow-hover);
}

.review-rating {
  color: var(--accent-amber);
  margin-bottom: 14px;
  display: flex;
  gap: 3px;
  font-size: 0.9rem;
}

.review-text {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 20px;
  flex-grow: 1;
}

.review-author {
  display: flex;
  align-items: center;
  gap: 12px;
  border-top: 1px solid var(--border-subtle);
  padding-top: 16px;
}

.author-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--bg-accent-soft);
  color: var(--brand-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 750;
  font-size: 0.95rem;
}

.author-info h4 {
  font-size: 0.92rem;
  font-weight: 750;
  color: var(--text-primary);
}

.author-info p {
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* 16. 常见问题解答 (FAQ Accordion) */
.faq-wrapper {
  max-width: 840px;
  margin: 0 auto;
}

.faq-item {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  margin-bottom: 14px;
  box-shadow: var(--card-shadow);
  overflow: hidden;
  transition: var(--transition-normal);
}

.faq-item:hover {
  border-color: var(--border-medium);
}

.faq-question {
  width: 100%;
  padding: 22px 24px;
  text-align: left;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-size: 1.05rem;
  font-weight: 750;
  color: var(--text-primary);
}

.faq-icon {
  width: 20px;
  height: 20px;
  transition: transform 0.3s ease;
  color: var(--text-muted);
  flex-shrink: 0;
}

.faq-item.active .faq-icon {
  transform: rotate(180deg);
  color: var(--brand-primary);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s cubic-bezier(0.16, 1, 0.3, 1), padding 0.35s ease;
  padding: 0 24px;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
}

.faq-item.active .faq-answer {
  max-height: 320px;
  padding: 0 24px 22px 24px;
}

/* 17. 底部行动号召 (CTA Banner) */
.cta-banner {
  background: var(--brand-gradient);
  border-radius: var(--radius-xl);
  padding: 64px 40px;
  text-align: center;
  color: #ffffff;
  position: relative;
  overflow: hidden;
  box-shadow: 0 20px 45px var(--brand-glow);
  margin-bottom: 20px;
}

.cta-banner h2 {
  font-size: 2.35rem;
  font-weight: 900;
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}

.cta-banner p {
  font-size: 1.1rem;
  opacity: 0.92;
  max-width: 640px;
  margin: 0 auto 34px auto;
  line-height: 1.65;
}

/* 18. 页脚规范 (Footer) */
/* 明确要求：页脚只保留 网站地图、关于我们、服务条款、隐私政策 这四个标题，在新页面打开展示 */
.footer {
  background: var(--bg-surface);
  border-top: 1px solid var(--border-subtle);
  padding: 44px 0 36px 0;
  margin-top: auto;
  transition: var(--transition-theme);
}

.footer-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 36px;
  margin-bottom: 22px;
  flex-wrap: wrap;
}

.footer-link {
  font-size: 0.98rem;
  font-weight: 600;
  color: var(--text-secondary);
  transition: var(--transition-normal);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
}

.footer-link:hover {
  color: var(--brand-primary);
  background: var(--bg-subtle);
}

.footer-divider {
  width: 1px;
  height: 16px;
  background-color: var(--border-subtle);
}

.footer-bottom {
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer-domain {
  font-weight: 600;
  color: var(--text-secondary);
}

/* 19. 独立子页面通用样式 (about, terms, privacy, sitemap, insights) */
.page-header {
  padding: 60px 0 40px 0;
  background: var(--bg-subtle);
  border-bottom: 1px solid var(--border-subtle);
  margin-bottom: 48px;
  transition: var(--transition-theme);
}

.page-header h1 {
  font-size: 2.4rem;
  font-weight: 900;
  margin-bottom: 12px;
}

.page-header p {
  color: var(--text-secondary);
  font-size: 1.05rem;
}

.content-box {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: 48px;
  box-shadow: var(--card-shadow);
  margin-bottom: 60px;
  transition: var(--transition-theme);
}

.content-section {
  margin-bottom: 40px;
}

.content-section:last-child {
  margin-bottom: 0;
}

.content-section h2 {
  font-size: 1.5rem;
  font-weight: 850;
  color: var(--text-primary);
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--border-subtle);
  display: flex;
  align-items: center;
  gap: 10px;
}

.content-section h3 {
  font-size: 1.2rem;
  font-weight: 750;
  color: var(--text-primary);
  margin: 20px 0 10px 0;
}

.content-section p, .content-section li {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 12px;
}

.content-section ul {
  padding-left: 20px;
  list-style: disc;
  margin-bottom: 16px;
}

.alert-banner {
  padding: 16px 20px;
  border-radius: var(--radius-md);
  margin: 20px 0;
  display: flex;
  gap: 12px;
  align-items: flex-start;
  font-size: 0.95rem;
  line-height: 1.6;
}

.alert-info {
  background: var(--badge-bg);
  border: 1px solid rgba(112, 26, 117, 0.2);
  color: var(--text-primary);
}

.alert-warning {
  background: rgba(245, 158, 11, 0.1);
  border: 1px solid rgba(245, 158, 11, 0.3);
  color: var(--text-primary);
}

.alert-success {
  background: var(--accent-green-bg);
  border: 1px solid rgba(16, 185, 129, 0.3);
  color: var(--text-primary);
}

/* 推荐资讯卡片流 */
.articles-list {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.article-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--card-shadow);
  transition: var(--transition-normal);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.article-card:hover {
  transform: translateY(-4px);
  border-color: var(--brand-primary);
  box-shadow: var(--card-shadow-hover);
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.article-tag {
  background: var(--badge-bg);
  color: var(--badge-text);
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  font-weight: 700;
}

.article-title {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1.35;
}

.article-snippet {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* 20. 响应式适配媒体查询 (@media) */
@media (max-width: 1080px) {
  .hero-widescreen-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .hero-left-column {
    align-items: center;
    text-align: center;
  }
  .hero-cosmic-subtitle {
    margin-left: auto;
    margin-right: auto;
  }
  .hero-mini-badges {
    justify-content: center;
  }
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .streaming-container {
    grid-template-columns: 1fr;
  }
  .ai-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 520px;
    margin: 0 auto;
  }
  .pricing-card.featured {
    transform: none;
  }
  .pricing-card.featured:hover {
    transform: translateY(-6px);
  }
  .reviews-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .section {
    padding: 60px 0;
  }

  .section-title, .service-intro-title {
    font-size: 1.95rem;
  }

  .hero-cosmic {
    padding: 50px 0 0 0;
  }

  .hero-cosmic-title {
    font-size: clamp(1.25rem, 4.6vw, 1.95rem);
    white-space: nowrap;
  }

  .hero-cosmic-subtitle {
    font-size: 1.05rem;
  }

  .theater-screen-display {
    height: 240px;
  }

  /* 手机端单栏显示与手指易触达性优化 (min-height 48px) */
  .features-grid {
    grid-template-columns: 1fr;
  }

  .streaming-cards-grid {
    grid-template-columns: 1fr;
  }

  .ai-grid {
    grid-template-columns: 1fr;
  }

  .reviews-grid {
    grid-template-columns: 1fr;
  }

  .nav-links {
    position: fixed;
    top: 74px;
    left: 0;
    right: 0;
    background: rgba(19, 15, 38, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(112, 26, 117, 0.4);
    flex-direction: column;
    padding: 24px;
    gap: 18px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.8);
    transform: translateY(-160%);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.35s ease, opacity 0.25s ease;
  }

  .nav-links.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .mobile-menu-btn {
    display: flex;
  }

  .cta-banner {
    padding: 44px 24px;
  }

  .cta-banner h2 {
    font-size: 1.85rem;
  }

  .content-box {
    padding: 28px 20px;
  }

  .footer-nav {
    flex-direction: column;
    gap: 16px;
  }

  .footer-divider {
    display: none;
  }

  .btn {
    min-height: 48px;
    padding: 12px 24px;
  }

  .hero-cta-wrap {
    flex-direction: column;
    width: 100%;
  }

  .hero-cta-wrap .btn {
    width: 100%;
  }
}

@media (max-width: 480px) {
  .hero-cosmic-title {
    font-size: clamp(1.05rem, 5.2vw, 1.45rem);
    white-space: nowrap;
  }

  .hero-mini-badges {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* ==========================================================================
   21. 深度 SEO 文章阅读页专用排版样式 (Deep SEO Article Styles)
   ========================================================================== */

.article-container {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 24px;
}

.article-header {
  padding: 48px 0 32px 0;
  border-bottom: 1px solid var(--border-subtle);
  margin-bottom: 36px;
}

.article-breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 18px;
}

.article-breadcrumb a {
  color: var(--text-secondary);
}

.article-breadcrumb a:hover {
  color: var(--brand-primary);
}

.article-main-title {
  font-size: 2.35rem;
  font-weight: 900;
  line-height: 1.3;
  letter-spacing: -0.6px;
  color: var(--text-primary);
  margin-bottom: 20px;
}

.article-meta-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.88rem;
  color: var(--text-muted);
}

.article-meta-row span {
  display: flex;
  align-items: center;
  gap: 6px;
}

/* 文章目录 (Table of Contents) */
.article-toc {
  background: var(--bg-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 24px 28px;
  margin-bottom: 42px;
}

.toc-title {
  font-size: 1.12rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.toc-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding-left: 8px;
}

.toc-item {
  font-size: 0.95rem;
}

.toc-link {
  color: var(--text-secondary);
  transition: var(--transition-normal);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.toc-link:hover {
  color: var(--brand-primary);
  transform: translateX(4px);
}

/* 文章正文 (Article Body) */
.article-body {
  font-size: 1.05rem;
  line-height: 1.85;
  color: var(--text-secondary);
}

.article-body h2 {
  font-size: 1.65rem;
  font-weight: 850;
  color: var(--text-primary);
  margin: 48px 0 20px 0;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--border-subtle);
  scroll-margin-top: 100px;
}

.article-body h3 {
  font-size: 1.3rem;
  font-weight: 750;
  color: var(--text-primary);
  margin: 32px 0 14px 0;
  scroll-margin-top: 100px;
}

.article-body p {
  margin-bottom: 20px;
}

.article-body ul, .article-body ol {
  margin: 18px 0 24px 24px;
}

.article-body li {
  margin-bottom: 10px;
}

.article-body strong {
  color: var(--text-primary);
  font-weight: 700;
}

.article-internal-link {
  color: var(--brand-primary);
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 4px;
  transition: var(--transition-normal);
}

.article-internal-link:hover {
  color: var(--brand-primary-hover);
}

/* 对比数据表格 */
.article-table-wrap {
  overflow-x: auto;
  margin: 28px 0;
}

.article-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.95rem;
  background: var(--bg-surface);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--card-shadow);
}

.article-table th {
  background: var(--bg-subtle);
  color: var(--text-primary);
  font-weight: 750;
  padding: 14px 18px;
  border-bottom: 2px solid var(--border-subtle);
}

.article-table td {
  padding: 14px 18px;
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-secondary);
}

.article-table tr:hover td {
  background: var(--bg-accent-soft);
}

/* 文章内置 CTA */
.article-cta-box {
  background: var(--brand-gradient);
  border-radius: var(--radius-xl);
  padding: 40px 32px;
  color: #ffffff;
  margin: 44px 0;
  text-align: center;
  box-shadow: 0 16px 36px var(--brand-glow);
}

.article-cta-box h3 {
  font-size: 1.7rem;
  font-weight: 850;
  margin-bottom: 12px;
  color: #ffffff;
}

.article-cta-box p {
  font-size: 1.02rem;
  opacity: 0.92;
  margin-bottom: 24px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* 相关阅读网格 (Related Reading Grid) */
.related-reading-section {
  margin-top: 56px;
  padding-top: 40px;
  border-top: 1px solid var(--border-subtle);
}

.related-title {
  font-size: 1.5rem;
  font-weight: 850;
  color: var(--text-primary);
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.related-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 22px;
  box-shadow: var(--card-shadow);
  transition: var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.related-card:hover {
  transform: translateY(-4px);
  border-color: var(--brand-primary);
  box-shadow: var(--card-shadow-hover);
}

.related-card-tag {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--badge-text);
  background: var(--badge-bg);
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  align-self: flex-start;
  margin-bottom: 10px;
}

.related-card-title {
  font-size: 1.05rem;
  font-weight: 750;
  color: var(--text-primary);
  line-height: 1.45;
  margin-bottom: 8px;
}

.related-card-desc {
  font-size: 0.86rem;
  color: var(--text-secondary);
  line-height: 1.55;
  flex-grow: 1;
}

@media (max-width: 768px) {
  .article-main-title {
    font-size: 1.85rem;
  }
  .related-grid {
    grid-template-columns: 1fr;
  }
  .article-cta-box {
    padding: 32px 20px;
  }
}