/* ====================================================================
   龙猫云 (longmaoyun.art) 核心样式表
   规范：AG WEBSITE GENERATION SPECIFICATION 2026 VERSION 4.0
   设计模式：CYBER AURORA & VIBRANT OBSIDIAN (暗夜极客多彩极光动效版)
   特性：多维极光渐变、动态微交互、微光粒子网格、高对比沉浸、硬件加速动画
   ==================================================================== */

:root {
  /* 基础暗黑画布体系 */
  --bg-page: #060911;
  --bg-surface: #0c1222;
  --bg-surface-elevated: #151f38;
  --bg-subtle: #111a30;
  
  /* 多元高饱和极光色彩体系 (解决视觉单调问题) */
  --cyber-cyan: #00f0ff;
  --electric-blue: #38bdf8;
  --neon-purple: #c084fc;
  --aurora-violet: #818cf8;
  --neon-pink: #f43f5e;
  --emerald-glow: #10b981;
  --mint-light: #34d399;
  --amber-gold: #fbbf24;
  --solar-orange: #fb923c;

  /* 品牌核心主色与辉光 */
  --primary: #38bdf8;
  --primary-hover: #00f0ff;
  --primary-glow: rgba(0, 240, 255, 0.35);
  --purple-glow: rgba(192, 132, 252, 0.35);
  --emerald-glow-rgb: rgba(16, 185, 129, 0.35);
  --pink-glow-rgb: rgba(244, 63, 94, 0.35);
  --gold-glow-rgb: rgba(251, 191, 36, 0.35);

  /* 动态发光边框体系 */
  --border-color: rgba(255, 255, 255, 0.09);
  --border-subtle: rgba(255, 255, 255, 0.14);
  --border-cyan: rgba(0, 240, 255, 0.35);
  --border-purple: rgba(192, 132, 252, 0.35);
  --border-emerald: rgba(16, 185, 129, 0.35);

  /* 文字颜色体系 (WCAG AAA 级高对比，黑白极度清晰) */
  --text-main: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  --text-inverse: #020617;

  /* 布局与圆角规范 */
  --max-width: 1160px;
  --header-height: 70px;
  --radius-xs: 6px;
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-full: 9999px;

  /* 阴影规范 */
  --shadow-sm: 0 2px 6px rgba(0, 0, 0, 0.5);
  --shadow-card: 0 8px 30px -4px rgba(0, 0, 0, 0.6), 0 0 0 1px var(--border-color);
  --shadow-glow-cyan: 0 0 30px rgba(0, 240, 255, 0.22);
  --shadow-glow-purple: 0 0 30px rgba(192, 132, 252, 0.22);

  /* 系统字体栈 (绝无中文字体外链，保证极致 LCP) */
  --font-stack: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

/* 全局重置与多重极光流光背景 */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  background-color: var(--bg-page);
}

body {
  font-family: var(--font-stack);
  background-color: var(--bg-page);
  /* 炫彩多层微光氛围 + 纯 CSS 动态感数码十字网格，0 请求高视觉丰富度 */
  background-image: 
    radial-gradient(circle at 10% 8%, rgba(0, 240, 255, 0.12) 0%, transparent 40%),
    radial-gradient(circle at 90% 25%, rgba(192, 132, 252, 0.12) 0%, transparent 45%),
    radial-gradient(circle at 50% 65%, rgba(16, 185, 129, 0.08) 0%, transparent 50%),
    radial-gradient(circle at 20% 90%, rgba(244, 63, 94, 0.08) 0%, transparent 45%),
    linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
  background-size: 100% 100%, 100% 100%, 100% 100%, 100% 100%, 40px 40px, 40px 40px;
  background-attachment: fixed;
  color: var(--text-main);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  padding-bottom: 76px;
  overflow-x: hidden;
}

@media (min-width: 768px) {
  body {
    padding-bottom: 0;
  }
}

:focus-visible {
  outline: 2px solid var(--cyber-cyan);
  outline-offset: 3px;
}

a {
  color: var(--cyber-cyan);
  text-decoration: none;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

a:hover {
  color: #7dd3fc;
  text-shadow: 0 0 10px rgba(0, 240, 255, 0.5);
}

img, svg {
  max-width: 100%;
  height: auto;
  display: block;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
}

/* 动效关键帧动画定义 */
@keyframes radarPulse {
  0% {
    transform: scale(0.95);
    box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
  }
  70% {
    transform: scale(1);
    box-shadow: 0 0 0 9px rgba(16, 185, 129, 0);
  }
  100% {
    transform: scale(0.95);
    box-shadow: 0 0 0 0 rgba(16, 185, 129, 0);
  }
}

@keyframes buttonShimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

@keyframes floatGentle {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-6px); }
}

@keyframes borderRotate {
  0% { border-color: rgba(0, 240, 255, 0.4); }
  50% { border-color: rgba(192, 132, 252, 0.5); }
  100% { border-color: rgba(0, 240, 255, 0.4); }
}

@keyframes liveSignalBar {
  0%, 100% { height: 40%; }
  50% { height: 100%; }
}

/* 顶部导航 Header - 悬浮流光黑曜石 */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(6, 9, 17, 0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
  height: var(--header-height);
  display: flex;
  align-items: center;
  transition: all 0.3s ease;
}

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

.site-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--text-main);
  text-decoration: none;
  letter-spacing: -0.01em;
}

.site-logo:hover .logo-icon {
  transform: rotate(-6deg) scale(1.06);
  box-shadow: 0 0 22px rgba(0, 240, 255, 0.6);
}

.logo-icon {
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, #00f0ff 0%, #a855f7 100%);
  color: #020617;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  font-weight: 900;
  box-shadow: 0 0 16px rgba(0, 240, 255, 0.35);
  transition: all 0.25s ease;
}

.site-nav {
  display: none;
}

@media (min-width: 768px) {
  .site-nav {
    display: flex;
    align-items: center;
    gap: 30px;
  }
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-secondary);
  position: relative;
  padding: 8px 0;
  transition: color 0.2s ease;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background: linear-gradient(90deg, var(--cyber-cyan), var(--neon-purple));
  transition: width 0.25s ease;
  border-radius: var(--radius-full);
}

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

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* 移动端汉堡菜单 */
.menu-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 42px;
  height: 42px;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  cursor: pointer;
  padding: 9px;
  transition: border-color 0.2s ease;
}

.menu-toggle:hover {
  border-color: var(--cyber-cyan);
}

@media (min-width: 768px) {
  .menu-toggle {
    display: none;
  }
}

.menu-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--text-main);
  transition: all 0.2s ease;
}

.mobile-nav-drawer {
  display: none;
  position: absolute;
  top: var(--header-height);
  left: 0;
  right: 0;
  background-color: rgba(12, 18, 34, 0.98);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-cyan);
  padding: 24px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.8);
  flex-direction: column;
  gap: 16px;
}

.mobile-nav-drawer.active {
  display: flex;
}

.mobile-nav-drawer .nav-link {
  font-size: 1.05rem;
  padding: 12px 0;
  border-bottom: 1px solid var(--border-color);
}

/* 按钮通用规范 - 赛博流光发光实体 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 0.96rem;
  font-weight: 700;
  padding: 11px 24px;
  min-height: 44px;
  min-width: 44px;
  border-radius: var(--radius-sm);
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  cursor: pointer;
  border: 1px solid transparent;
  white-space: nowrap;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: linear-gradient(135deg, #00f0ff 0%, #3b82f6 50%, #8b5cf6 100%);
  background-size: 200% auto;
  color: #020617;
  font-weight: 800;
  box-shadow: 0 0 22px rgba(0, 240, 255, 0.4);
}

.btn-primary:hover {
  background-position: right center;
  transform: translateY(-2px);
  box-shadow: 0 0 32px rgba(0, 240, 255, 0.65), 0 0 12px rgba(192, 132, 252, 0.5);
  color: #000000;
}

.btn-secondary {
  background-color: rgba(21, 31, 56, 0.85);
  color: var(--text-main);
  border: 1px solid var(--border-subtle);
  backdrop-filter: blur(8px);
}

.btn-secondary:hover {
  background-color: rgba(30, 45, 82, 0.95);
  border-color: var(--cyber-cyan);
  color: #ffffff;
  transform: translateY(-2px);
  box-shadow: 0 0 20px rgba(0, 240, 255, 0.25);
}

.btn-lg {
  padding: 14px 32px;
  font-size: 1.08rem;
  min-height: 50px;
}

.btn-block {
  display: flex;
  width: 100%;
}

/* 首屏 Hero 区块 */
.hero-section {
  padding: 50px 0 54px;
  position: relative;
}

@media (min-width: 768px) {
  .hero-section {
    padding: 76px 0 70px;
  }
}

.hero-content {
  max-width: 880px;
  margin: 0 auto;
  text-align: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background-color: rgba(12, 18, 34, 0.9);
  border: 1px solid var(--border-cyan);
  color: var(--cyber-cyan);
  font-size: 0.86rem;
  font-weight: 700;
  padding: 7px 18px;
  border-radius: var(--radius-full);
  margin-bottom: 24px;
  box-shadow: 0 0 20px rgba(0, 240, 255, 0.18);
  animation: borderRotate 6s infinite ease-in-out;
}

.status-dot-pulse {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background-color: var(--emerald-glow);
  box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
  animation: radarPulse 2s infinite cubic-bezier(0.4, 0, 0.6, 1);
}

.hero-title {
  font-size: 2.25rem;
  line-height: 1.25;
  font-weight: 900;
  color: var(--text-main);
  margin-bottom: 22px;
  letter-spacing: -0.02em;
  /* 炫彩渐变大标题 */
  background: linear-gradient(135deg, #ffffff 30%, #7dd3fc 70%, #c084fc 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 4px 18px rgba(0, 0, 0, 0.7));
}

@media (min-width: 768px) {
  .hero-title {
    font-size: 3.4rem;
  }
}

.hero-subtitle {
  font-size: 1.08rem;
  line-height: 1.78;
  color: var(--text-secondary);
  margin-bottom: 36px;
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
}

@media (min-width: 768px) {
  .hero-subtitle {
    font-size: 1.2rem;
  }
}

.hero-actions {
  display: flex;
  flex-direction: column;
  gap: 14px;
  justify-content: center;
  max-width: 360px;
  margin: 0 auto 40px;
}

@media (min-width: 640px) {
  .hero-actions {
    flex-direction: row;
    max-width: none;
  }
}

/* 动态测速雷达控制台 (Hero 实测数据静态组件) */
.hero-radar-board {
  max-width: 780px;
  margin: 0 auto 36px;
  background: linear-gradient(180deg, rgba(21, 31, 56, 0.7) 0%, rgba(12, 18, 34, 0.9) 100%);
  border: 1px solid var(--border-cyan);
  border-radius: var(--radius-lg);
  padding: 22px 20px;
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.6), 0 0 25px rgba(0, 240, 255, 0.12);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.radar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-color);
  font-size: 0.86rem;
}

.radar-live-indicator {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--emerald-glow);
  font-weight: 700;
  font-family: var(--font-mono);
}

.radar-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

@media (min-width: 640px) {
  .radar-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.radar-node-card {
  background-color: rgba(6, 9, 17, 0.65);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-sm);
  padding: 12px;
  text-align: left;
  transition: all 0.2s ease;
}

.radar-node-card:hover {
  border-color: var(--cyber-cyan);
  transform: translateY(-2px);
  background-color: rgba(15, 23, 42, 0.85);
}

.node-region {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 6px;
}

.node-flag {
  font-size: 1.1rem;
}

.node-ping-val {
  font-family: var(--font-mono);
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--emerald-glow);
}

.node-type-tag {
  font-size: 0.72rem;
  color: var(--cyber-cyan);
  background: rgba(0, 240, 255, 0.08);
  padding: 2px 6px;
  border-radius: var(--radius-xs);
  display: inline-block;
  margin-top: 4px;
}

/* 全平台兼容图标条带 */
.platform-strip {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 12px 24px;
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--border-color);
  font-size: 0.86rem;
  color: var(--text-muted);
}

.platform-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
  color: var(--text-secondary);
}

.platform-item svg {
  color: var(--cyber-cyan);
}

/* 首屏关键数据统计卡片 */
.hero-meta-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  max-width: 780px;
  margin: 32px auto 0;
}

@media (min-width: 640px) {
  .hero-meta-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.meta-item {
  background: rgba(12, 18, 34, 0.7);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 16px 12px;
  text-align: center;
  transition: all 0.2s ease;
}

.meta-item:hover {
  border-color: var(--cyber-cyan);
  transform: translateY(-2px);
  background: rgba(15, 23, 42, 0.9);
  box-shadow: 0 4px 20px rgba(0, 240, 255, 0.15);
}

.meta-number {
  font-family: var(--font-mono);
  font-size: 1.55rem;
  font-weight: 900;
  color: var(--cyber-cyan);
  line-height: 1.2;
  margin-bottom: 4px;
}

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

/* 模块通用布局 */
.section {
  padding: 68px 0;
  border-bottom: 1px solid var(--border-color);
  position: relative;
}

@media (min-width: 768px) {
  .section {
    padding: 92px 0;
  }
}

.section-header {
  text-align: center;
  max-width: 740px;
  margin: 0 auto 48px;
}

.section-title {
  font-size: 1.95rem;
  font-weight: 900;
  color: var(--text-main);
  margin-bottom: 14px;
  letter-spacing: -0.01em;
}

@media (min-width: 768px) {
  .section-title {
    font-size: 2.35rem;
  }
}

.section-subtitle {
  font-size: 1.02rem;
  color: var(--text-muted);
  line-height: 1.65;
}

/* 特性卡片矩阵 (Features 4 Cards) - 多彩发光独立主题 */
.features-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
}

@media (min-width: 640px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .features-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.feature-card {
  background: linear-gradient(180deg, rgba(15, 23, 42, 0.95) 0%, rgba(12, 18, 34, 0.95) 100%);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 30px 24px;
  box-shadow: var(--shadow-card);
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--card-accent, var(--cyber-cyan)), transparent);
  opacity: 0;
  transition: opacity 0.25s ease;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 36px -4px rgba(0, 0, 0, 0.7), 0 0 26px var(--card-glow, rgba(0, 240, 255, 0.2));
  border-color: var(--card-accent, var(--cyber-cyan));
}

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

/* 4 张卡独立彩色主题 */
.feature-card.theme-cyan {
  --card-accent: var(--cyber-cyan);
  --card-glow: rgba(0, 240, 255, 0.25);
}

.feature-card.theme-purple {
  --card-accent: var(--neon-purple);
  --card-glow: rgba(192, 132, 252, 0.25);
}

.feature-card.theme-emerald {
  --card-accent: var(--emerald-glow);
  --card-glow: rgba(16, 185, 129, 0.25);
}

.feature-card.theme-amber {
  --card-accent: var(--amber-gold);
  --card-glow: rgba(251, 191, 36, 0.25);
}

.feature-icon-wrapper {
  width: 52px;
  height: 52px;
  background-color: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  color: var(--card-accent, var(--cyber-cyan));
  box-shadow: 0 0 18px var(--card-glow, rgba(0, 240, 255, 0.15));
}

.feature-title {
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 10px;
}

.feature-desc {
  font-size: 0.94rem;
  color: var(--text-secondary);
  line-height: 1.68;
}

/* 核心优势对比 (Benefits) */
.benefits-wrapper {
  background: linear-gradient(180deg, rgba(15, 23, 42, 0.9) 0%, rgba(10, 15, 28, 0.95) 100%);
  border: 1px solid var(--border-cyan);
  border-radius: var(--radius-lg);
  padding: 34px 26px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6), 0 0 30px rgba(0, 240, 255, 0.1);
}

.comparison-table-wrapper {
  overflow-x: auto;
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  min-width: 580px;
}

.comparison-table th,
.comparison-table td {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-color);
  font-size: 0.95rem;
}

.comparison-table th {
  background-color: rgba(21, 31, 56, 0.95);
  color: var(--text-main);
  font-weight: 800;
  letter-spacing: 0.01em;
}

.comparison-table .highlight-col {
  background: linear-gradient(180deg, rgba(0, 240, 255, 0.1) 0%, rgba(192, 132, 252, 0.06) 100%);
  font-weight: 800;
  color: var(--cyber-cyan);
  border-left: 1px solid var(--border-cyan);
  border-right: 1px solid var(--border-cyan);
  text-shadow: 0 0 10px rgba(0, 240, 255, 0.3);
}

/* 流媒体与 AI 支持矩阵 (Matrix) - 炫彩平台图标芯片 */
.support-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
}

@media (min-width: 768px) {
  .support-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.support-box {
  background: linear-gradient(180deg, rgba(15, 23, 42, 0.9) 0%, rgba(10, 15, 28, 0.95) 100%);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 32px 26px;
  box-shadow: var(--shadow-card);
  transition: all 0.25s ease;
}

.support-box:hover {
  border-color: var(--border-cyan);
  box-shadow: 0 14px 34px -4px rgba(0, 0, 0, 0.7), 0 0 25px rgba(0, 240, 255, 0.15);
}

.support-box-title {
  font-size: 1.25rem;
  font-weight: 800;
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text-main);
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}

/* 彩色品牌芯片标签 */
.tag-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-size: 0.86rem;
  font-weight: 600;
  background-color: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  transition: all 0.2s ease;
}

.tag-item:hover {
  transform: translateY(-2px);
}

.tag-item.tag-netflix { border-color: rgba(239, 68, 68, 0.5); color: #f87171; background: rgba(239, 68, 68, 0.1); }
.tag-item.tag-youtube { border-color: rgba(244, 63, 94, 0.5); color: #fb7185; background: rgba(244, 63, 94, 0.1); }
.tag-item.tag-disney { border-color: rgba(59, 130, 246, 0.5); color: #60a5fa; background: rgba(59, 130, 246, 0.1); }
.tag-item.tag-spotify { border-color: rgba(16, 185, 129, 0.5); color: #34d399; background: rgba(16, 185, 129, 0.1); }
.tag-item.tag-chatgpt { border-color: rgba(20, 184, 166, 0.5); color: #2dd4bf; background: rgba(20, 184, 166, 0.1); }
.tag-item.tag-claude { border-color: rgba(245, 158, 11, 0.5); color: #fbbf24; background: rgba(245, 158, 11, 0.1); }
.tag-item.tag-midjourney { border-color: rgba(168, 85, 247, 0.5); color: #c084fc; background: rgba(168, 85, 247, 0.1); }
.tag-item.tag-gemini { border-color: rgba(56, 189, 248, 0.5); color: #38bdf8; background: rgba(56, 189, 248, 0.1); }

/* 使用场景卡片 (Scenarios 3 Cards) - 三大人群彩色光环 */
.scenarios-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
}

@media (min-width: 768px) {
  .scenarios-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.scenario-card {
  background: linear-gradient(180deg, rgba(15, 23, 42, 0.95) 0%, rgba(12, 18, 34, 0.95) 100%);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 30px 24px;
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  transition: all 0.25s ease;
  position: relative;
}

.scenario-card.card-entertainment:hover {
  border-color: var(--neon-pink);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.7), 0 0 25px rgba(244, 63, 94, 0.25);
  transform: translateY(-3px);
}

.scenario-card.card-business:hover {
  border-color: var(--cyber-cyan);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.7), 0 0 25px rgba(0, 240, 255, 0.25);
  transform: translateY(-3px);
}

.scenario-card.card-academic:hover {
  border-color: var(--emerald-glow);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.7), 0 0 25px rgba(16, 185, 129, 0.25);
  transform: translateY(-3px);
}

.scenario-badge {
  align-self: flex-start;
  font-size: 0.8rem;
  font-weight: 800;
  padding: 5px 14px;
  border-radius: var(--radius-full);
  margin-bottom: 16px;
}

.scenario-card.card-entertainment .scenario-badge {
  background: rgba(244, 63, 94, 0.12);
  border: 1px solid rgba(244, 63, 94, 0.4);
  color: #fb7185;
}

.scenario-card.card-business .scenario-badge {
  background: rgba(0, 240, 255, 0.12);
  border: 1px solid rgba(0, 240, 255, 0.4);
  color: var(--cyber-cyan);
}

.scenario-card.card-academic .scenario-badge {
  background: rgba(16, 185, 129, 0.12);
  border: 1px solid rgba(16, 185, 129, 0.4);
  color: var(--mint-light);
}

.scenario-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 8px;
}

.scenario-device {
  font-size: 0.88rem;
  font-weight: 700;
  margin-bottom: 14px;
}

.scenario-card.card-entertainment .scenario-device { color: #f43f5e; }
.scenario-card.card-business .scenario-device { color: var(--cyber-cyan); }
.scenario-card.card-academic .scenario-device { color: var(--emerald-glow); }

.scenario-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
  flex-grow: 1;
}

/* 定价卡片区域 (Pricing 3 Tiers) - 阶梯色阶 */
.pricing-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
  align-items: stretch;
}

@media (min-width: 768px) {
  .pricing-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.pricing-card {
  background: linear-gradient(180deg, rgba(15, 23, 42, 0.95) 0%, rgba(10, 15, 28, 0.98) 100%);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 38px 28px;
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all 0.25s ease;
}

.pricing-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.8);
}

/* 中档推荐：高能流光极光边框与动态光晕 */
.pricing-card.featured {
  border: 1px solid var(--cyber-cyan);
  box-shadow: 0 0 36px rgba(0, 240, 255, 0.28), 0 20px 40px rgba(0, 0, 0, 0.8);
  background: linear-gradient(180deg, rgba(18, 30, 58, 0.95) 0%, rgba(10, 18, 36, 0.98) 100%);
}

.featured-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, #00f0ff 0%, #3b82f6 50%, #a855f7 100%);
  color: #020617;
  font-size: 0.82rem;
  font-weight: 900;
  padding: 4px 18px;
  border-radius: var(--radius-full);
  letter-spacing: 0.02em;
  box-shadow: 0 0 20px rgba(0, 240, 255, 0.5);
}

.pricing-header {
  margin-bottom: 20px;
}

.pricing-tier {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 6px;
}

.pricing-target {
  font-size: 0.88rem;
  color: var(--text-muted);
}

.pricing-price {
  display: flex;
  align-items: baseline;
  margin: 22px 0;
}

.currency {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--cyber-cyan);
}

.amount {
  font-family: var(--font-mono);
  font-size: 2.8rem;
  font-weight: 900;
  color: var(--text-main);
  line-height: 1;
}

.period {
  font-size: 0.94rem;
  color: var(--text-muted);
  margin-left: 8px;
}

.pricing-features {
  list-style: none;
  margin: 22px 0 34px;
  flex-grow: 1;
}

.pricing-feature-item {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 14px;
}

.feature-check {
  color: var(--emerald-glow);
  font-weight: 900;
  text-shadow: 0 0 8px rgba(16, 185, 129, 0.5);
}

/* 常见问题 FAQ (Accordion) */
.faq-list {
  max-width: 840px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: linear-gradient(180deg, rgba(15, 23, 42, 0.9) 0%, rgba(12, 18, 34, 0.95) 100%);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all 0.2s ease;
}

.faq-item:hover, .faq-item.active {
  border-color: var(--border-cyan);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.4), 0 0 16px rgba(0, 240, 255, 0.1);
}

.faq-question {
  width: 100%;
  padding: 20px 24px;
  min-height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  text-align: left;
  background: none;
  border: none;
  font-size: 1.08rem;
  font-weight: 700;
  color: var(--text-main);
  cursor: pointer;
  font-family: inherit;
}

.faq-icon {
  font-size: 1.4rem;
  color: var(--cyber-cyan);
  transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
  color: var(--neon-purple);
}

.faq-answer {
  padding: 0 24px 22px;
  font-size: 0.98rem;
  color: var(--text-secondary);
  line-height: 1.75;
  display: none;
}

.faq-item.active .faq-answer {
  display: block;
}

/* Final CTA */
.final-cta {
  background: transparent;
  padding: 70px 0;
  text-align: center;
}

.final-cta-box {
  background: linear-gradient(135deg, rgba(18, 30, 58, 0.95) 0%, rgba(10, 15, 28, 0.98) 100%);
  border: 1px solid var(--border-cyan);
  border-radius: var(--radius-lg);
  padding: 52px 28px;
  max-width: 820px;
  margin: 0 auto;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.8), 0 0 40px rgba(0, 240, 255, 0.2);
  position: relative;
}

.final-cta-title {
  font-size: 2.1rem;
  font-weight: 900;
  color: var(--text-main);
  margin-bottom: 16px;
  background: linear-gradient(135deg, #ffffff 40%, #7dd3fc 80%, #c084fc 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.final-cta-desc {
  font-size: 1.08rem;
  color: var(--text-secondary);
  margin-bottom: 30px;
  max-width: 620px;
  margin-left: auto;
  margin-right: auto;
}

/* 页脚 Footer - 严守 Layer 2：仅放导航与版权，禁止塞入文章列表，必须包含联盟披露 */
.site-footer {
  background-color: #04060b;
  border-top: 1px solid var(--border-color);
  padding: 46px 0 34px;
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 22px;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 22px;
  list-style: none;
}

.footer-link {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: all 0.2s ease;
}

.footer-link:hover {
  color: var(--cyber-cyan);
}

.footer-disclosure {
  font-size: 0.86rem;
  color: var(--text-muted);
  background-color: rgba(255, 255, 255, 0.035);
  border: 1px solid var(--border-color);
  padding: 9px 20px;
  border-radius: var(--radius-full);
}

.footer-copyright {
  font-size: 0.86rem;
  color: #64748b;
}

/* 移动端吸底 CTA 条 - 暗夜高亮发光浮条 */
.mobile-fixed-cta {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 99;
  background-color: rgba(6, 9, 17, 0.94);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-top: 1px solid var(--border-cyan);
  padding: 11px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transform: translateY(100%);
  transition: transform 0.25s ease;
  box-shadow: 0 -8px 24px rgba(0, 0, 0, 0.8);
}

.mobile-fixed-cta.visible {
  transform: translateY(0);
}

@media (min-width: 768px) {
  .mobile-fixed-cta {
    display: none !important;
  }
}

.mobile-cta-info {
  display: flex;
  flex-direction: column;
}

.mobile-cta-brand {
  font-size: 0.98rem;
  font-weight: 800;
  color: var(--text-main);
}

.mobile-cta-desc {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--cyber-cyan);
}

/* 文章正文与内容页样式 (Articles, About, Legal) */
.article-header {
  padding: 50px 0 34px;
  background: transparent;
  border-bottom: 1px solid var(--border-color);
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 16px;
}

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

.breadcrumb a:hover {
  color: var(--cyber-cyan);
}

.article-title {
  font-size: 2.15rem;
  font-weight: 900;
  color: var(--text-main);
  line-height: 1.32;
  margin-bottom: 16px;
  letter-spacing: -0.01em;
  background: linear-gradient(135deg, #ffffff 40%, #7dd3fc 90%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

@media (min-width: 768px) {
  .article-title {
    font-size: 2.5rem;
  }
}

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

.article-body {
  max-width: 860px;
  margin: 40px auto;
  padding: 0 20px;
}

.content-box {
  background: linear-gradient(180deg, rgba(15, 23, 42, 0.95) 0%, rgba(10, 15, 28, 0.98) 100%);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 38px 26px;
  box-shadow: var(--shadow-card);
}

@media (min-width: 768px) {
  .content-box {
    padding: 56px 48px;
  }
}

.prose {
  font-size: 1.05rem;
  line-height: 1.84;
  color: var(--text-secondary);
}

.prose p {
  margin-bottom: 24px;
}

.prose h2 {
  font-size: 1.55rem;
  font-weight: 800;
  color: var(--text-main);
  margin-top: 42px;
  margin-bottom: 20px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-color);
  letter-spacing: -0.01em;
}

.prose h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--cyber-cyan);
  margin-top: 30px;
  margin-bottom: 14px;
}

.prose ul, .prose ol {
  margin-bottom: 24px;
  padding-left: 24px;
}

.prose li {
  margin-bottom: 10px;
}

.prose pre, .prose code {
  font-family: var(--font-mono);
  background-color: #03060d;
  border-radius: var(--radius-xs);
}

.prose code {
  padding: 2px 8px;
  font-size: 0.9em;
  color: var(--cyber-cyan);
  border: 1px solid var(--border-color);
}

.prose pre {
  padding: 20px;
  overflow-x: auto;
  margin-bottom: 26px;
  border: 1px solid var(--border-color);
}

.prose pre code {
  padding: 0;
  background: none;
  border: none;
  color: var(--text-secondary);
}

.lead-paragraph {
  font-size: 1.12rem;
  line-height: 1.8;
  color: var(--text-main);
  background: linear-gradient(90deg, rgba(0, 240, 255, 0.12) 0%, rgba(15, 23, 42, 0.6) 100%);
  border-left: 4px solid var(--cyber-cyan);
  padding: 20px 24px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin-bottom: 34px;
  border-top: 1px solid var(--border-color);
  border-right: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.callout-box {
  background: linear-gradient(135deg, rgba(21, 31, 56, 0.8) 0%, rgba(12, 18, 34, 0.9) 100%);
  border: 1px solid var(--border-cyan);
  border-radius: var(--radius-md);
  padding: 24px;
  margin: 32px 0;
  box-shadow: 0 0 24px rgba(0, 240, 255, 0.1);
}

.callout-title {
  font-weight: 800;
  color: var(--cyber-cyan);
  margin-bottom: 10px;
}

.article-bottom-cta {
  background: linear-gradient(135deg, rgba(21, 31, 56, 0.9) 0%, rgba(10, 15, 28, 0.95) 100%);
  border: 1px solid var(--border-cyan);
  border-radius: var(--radius-md);
  padding: 34px 26px;
  text-align: center;
  margin: 42px 0;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.6), 0 0 30px rgba(0, 240, 255, 0.15);
}

.related-articles {
  margin-top: 46px;
  padding-top: 32px;
  border-top: 1px solid var(--border-color);
}

.related-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 20px;
}

.related-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.related-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  background: rgba(21, 31, 56, 0.6);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-main);
  font-weight: 600;
  transition: all 0.25s ease;
}

.related-link:hover {
  border-color: var(--cyber-cyan);
  color: var(--cyber-cyan);
  transform: translateX(4px);
  box-shadow: 0 0 20px rgba(0, 240, 255, 0.2);
  background: rgba(21, 31, 56, 0.9);
}

/* 列表与表格页 (Guides, Sitemap) */
.guides-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
  margin-top: 34px;
}

@media (min-width: 768px) {
  .guides-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.guide-card {
  background: linear-gradient(180deg, rgba(15, 23, 42, 0.95) 0%, rgba(10, 15, 28, 0.98) 100%);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 30px 26px;
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  transition: all 0.25s ease;
}

.guide-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-cyan);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.7), 0 0 26px rgba(0, 240, 255, 0.2);
}

.guide-card-meta {
  font-size: 0.84rem;
  color: var(--cyber-cyan);
  margin-bottom: 12px;
  font-weight: 700;
  font-family: var(--font-mono);
}

.guide-card-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 14px;
  line-height: 1.45;
}

.guide-card-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.68;
  flex-grow: 1;
  margin-bottom: 20px;
}

.guide-card-link {
  font-size: 0.94rem;
  font-weight: 700;
  color: var(--cyber-cyan);
  align-self: flex-start;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.guide-card-link:hover {
  color: #ffffff;
  transform: translateX(3px);
}

/* 减少动效模式 (无障碍支持) */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}