/* ===================================================================
   CyberGuard机场 - 全站二次元动漫幻想主题样式表 (style.css)
   主题定位：星海绮梦 · 极光星轨 (Starlight Mirage & Aurora Constellation)
   视觉特性：深邃夜幕星穹、极光流波漫射、全息星轨光晕、3D卡片倾斜、流星微尘动效
   技术标准：纯 CSS3 + SVG + 原生字体栈，零外部 CDN，GPU 硬件加速，毫秒级响应
   =================================================================== */

:root {
  /* 基础色彩：星海暗暮与深渊空间 */
  --bg-deep: #070a18;
  --bg-space: #0c122b;
  --bg-surface: #101838;
  --bg-card: rgba(16, 24, 54, 0.72);
  --bg-card-hover: rgba(24, 36, 78, 0.85);
  --bg-card-active: rgba(30, 45, 96, 0.95);

  /* 二次元极光与星海魔法调色盘 */
  --aurora-teal: #00f5d4;
  --aurora-teal-glow: rgba(0, 245, 212, 0.35);
  --nebula-cyan: #38bdf8;
  --nebula-cyan-glow: rgba(56, 189, 248, 0.35);
  --stellar-violet: #a855f7;
  --stellar-violet-glow: rgba(168, 85, 247, 0.3);
  --sakura-pink: #f43f5e;
  --sakura-pink-glow: rgba(244, 63, 94, 0.3);
  --starlight-gold: #fbbf24;
  --starlight-gold-glow: rgba(251, 191, 36, 0.25);

  /* 文字颜色分级 */
  --text-pure: #ffffff;
  --text-main: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  /* 边框与光影材质 */
  --border-glass: rgba(56, 189, 248, 0.16);
  --border-glow-teal: rgba(0, 245, 212, 0.5);
  --border-glow-violet: rgba(168, 85, 247, 0.45);
  --border-glow-pink: rgba(244, 63, 94, 0.45);

  /* 阴影效果 */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.45), 0 0 1px rgba(56, 189, 248, 0.2);
  --shadow-card-hover: 0 16px 36px rgba(0, 0, 0, 0.55), 0 0 20px rgba(0, 245, 212, 0.25);

  /* 系统原生字体栈 (绝不外链网络字体，保护 LCP) */
  --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;

  /* 尺寸与间距节奏 */
  --max-width: 1160px;
  --nav-height: 70px;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-full: 9999px;
  --transition-smooth: 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

/* 重置与全局盒模型 */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  background-color: var(--bg-deep);
  color: var(--text-main);
}

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.68;
  color: var(--text-main);
  background-color: var(--bg-deep);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  position: relative;
}

/* 背景星空与极光漫射全局层 */
body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: 
    radial-gradient(circle at 15% 20%, rgba(56, 189, 248, 0.12) 0%, transparent 45%),
    radial-gradient(circle at 85% 30%, rgba(168, 85, 247, 0.14) 0%, transparent 50%),
    radial-gradient(circle at 50% 80%, rgba(0, 245, 212, 0.08) 0%, transparent 60%),
    linear-gradient(180deg, #070a18 0%, #0c122b 50%, #070a18 100%);
  pointer-events: none;
  z-index: -2;
}

/* 动态星尘画布容器 */
#stardust-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: -1;
  opacity: 0.7;
}

/* 无障碍跳过链接 */
.skip-link {
  position: absolute;
  top: -100px;
  left: 16px;
  background: var(--aurora-teal);
  color: #070a18;
  padding: 8px 18px;
  font-weight: 700;
  border-radius: var(--radius-sm);
  z-index: 9999;
  text-decoration: none;
  box-shadow: 0 0 15px var(--aurora-teal-glow);
}
.skip-link:focus {
  top: 16px;
}

/* 链接通用样式 */
a {
  color: var(--nebula-cyan);
  text-decoration: none;
  transition: color var(--transition-smooth);
}
a:hover {
  color: var(--aurora-teal);
  text-decoration: underline;
}

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

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

/* ===================================================================
   顶部导航 Header (半透明模糊 + 极光细线边框)
   =================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: rgba(7, 10, 24, 0.82);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-glass);
  height: var(--nav-height);
  transition: background-color var(--transition-smooth), height var(--transition-smooth);
}
.site-header.is-scrolled {
  background-color: rgba(7, 10, 24, 0.94);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
}

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

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text-pure);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: 0.02em;
  text-decoration: none;
}
.brand-logo:hover {
  text-decoration: none;
  color: var(--aurora-teal);
}
.brand-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  filter: drop-shadow(0 0 8px var(--aurora-teal-glow));
}

.nav-menu {
  display: none;
  list-style: none;
  gap: 28px;
  align-items: center;
}
@media (min-width: 768px) {
  .nav-menu {
    display: flex;
  }
}

.nav-link {
  color: var(--text-secondary);
  font-size: 0.9375rem;
  font-weight: 500;
  padding: 8px 4px;
  text-decoration: none;
  position: relative;
  transition: color var(--transition-smooth);
}
.nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--aurora-teal), var(--nebula-cyan));
  transition: width var(--transition-smooth), left var(--transition-smooth);
  border-radius: 9999px;
}
.nav-link:hover, .nav-link.active {
  color: var(--text-pure);
  text-decoration: none;
}
.nav-link:hover::after, .nav-link.active::after {
  width: 100%;
  left: 0;
}

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

/* ===================================================================
   CTA 按钮系统 (动漫极光呼吸灯 + 光泽扫过 + 点击波纹)
   =================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: 700;
  line-height: 1;
  min-height: 44px;
  padding: 0 22px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  position: relative;
  overflow: hidden;
  white-space: nowrap;
  transition: transform 0.18s ease, box-shadow 0.2s ease, border-color 0.2s ease, background-color 0.2s ease;
  user-select: none;
}
.btn:hover {
  text-decoration: none;
}
.btn:active {
  transform: scale(0.97);
}

/* 主 CTA：极光双层渐变 + 呼吸微光 */
.btn-primary {
  background: linear-gradient(135deg, #00f5d4 0%, #38bdf8 50%, #818cf8 100%);
  color: #070a18;
  border-color: rgba(255, 255, 255, 0.4);
  box-shadow: 0 0 16px var(--aurora-teal-glow), inset 0 1px 1px rgba(255, 255, 255, 0.6);
  animation: aurora-pulse 3.5s infinite alternate ease-in-out;
}
.btn-primary:hover {
  color: #070a18;
  background: linear-gradient(135deg, #38bdf8 0%, #00f5d4 50%, #67e8f9 100%);
  box-shadow: 0 0 24px rgba(0, 245, 212, 0.6), inset 0 1px 2px rgba(255, 255, 255, 0.8);
  transform: translateY(-2px);
}

/* 扫光动效 (Shimmer Sweep) */
.btn::before {
  content: "";
  position: absolute;
  top: 0;
  left: -120%;
  width: 80%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.35), transparent);
  transform: skewX(-25deg);
  transition: left 0.65s ease;
  pointer-events: none;
}
.btn:hover::before {
  left: 140%;
}

/* 次 CTA：星轨磨砂玻璃质感 */
.btn-secondary {
  background: rgba(16, 24, 56, 0.8);
  color: var(--text-main);
  border: 1px solid var(--border-glass);
  backdrop-filter: blur(8px);
}
.btn-secondary:hover {
  background: rgba(24, 36, 78, 0.95);
  border-color: var(--nebula-cyan);
  color: var(--text-pure);
  box-shadow: 0 0 15px rgba(56, 189, 248, 0.25);
  transform: translateY(-2px);
}

.btn-large {
  min-height: 48px;
  padding: 0 30px;
  font-size: 1rem;
}
.btn-block {
  width: 100%;
}

/* 点击涟漪动画 */
.ripple {
  position: absolute;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.45);
  transform: scale(0);
  animation: ripple-animation 0.55s linear;
  pointer-events: none;
}
@keyframes ripple-animation {
  to {
    transform: scale(4);
    opacity: 0;
  }
}

@keyframes aurora-pulse {
  0% {
    box-shadow: 0 0 14px var(--aurora-teal-glow), inset 0 1px 1px rgba(255, 255, 255, 0.5);
  }
  100% {
    box-shadow: 0 0 24px rgba(56, 189, 248, 0.55), inset 0 1px 2px rgba(255, 255, 255, 0.8);
  }
}

/* 移动端菜单切换汉堡按钮 */
.menu-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  padding: 0;
  background: rgba(16, 24, 56, 0.7);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-sm);
  color: var(--text-main);
  cursor: pointer;
  transition: border-color var(--transition-smooth);
}
.menu-toggle:hover {
  border-color: var(--aurora-teal);
  color: var(--aurora-teal);
}
@media (min-width: 768px) {
  .menu-toggle {
    display: none;
  }
}

.mobile-nav-panel {
  display: none;
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  background-color: rgba(7, 10, 24, 0.96);
  border-bottom: 1px solid var(--border-glass);
  padding: 24px 20px;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: var(--shadow-md);
  z-index: 999;
}
.mobile-nav-panel.is-open {
  display: block;
}
.mobile-menu-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 24px;
}
.mobile-menu-item a {
  display: block;
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--text-main);
  padding: 6px 0;
}
.mobile-menu-item a:hover {
  color: var(--aurora-teal);
  text-decoration: none;
}

/* ===================================================================
   Hero 首屏主视觉区 (双栏插画布局 + 星门法阵)
   =================================================================== */
.hero-section {
  padding: 48px 0 56px;
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--border-glass);
}
@media (min-width: 992px) {
  .hero-section {
    padding: 72px 0 84px;
  }
}

.hero-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
  align-items: center;
}
@media (min-width: 992px) {
  .hero-layout {
    grid-template-columns: 1.15fr 0.85fr;
    gap: 48px;
  }
}

.hero-text-col {
  text-align: center;
}
@media (min-width: 992px) {
  .hero-text-col {
    text-align: left;
  }
}

/* 动漫灵符标签 */
.hero-badge-wrap {
  margin-bottom: 18px;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8125rem;
  font-weight: 700;
  padding: 5px 14px;
  background: rgba(0, 245, 212, 0.1);
  color: var(--aurora-teal);
  border: 1px solid rgba(0, 245, 212, 0.3);
  border-radius: var(--radius-full);
  box-shadow: 0 0 12px rgba(0, 245, 212, 0.15);
  letter-spacing: 0.04em;
}
.hero-badge .badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--aurora-teal);
  box-shadow: 0 0 6px var(--aurora-teal);
}

.hero-title {
  font-size: 2.125rem;
  line-height: 1.28;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text-pure);
  margin-bottom: 20px;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
}
@media (min-width: 768px) {
  .hero-title {
    font-size: 2.875rem;
  }
}
.hero-title .title-highlight {
  background: linear-gradient(135deg, #00f5d4 0%, #38bdf8 50%, #c084fc 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.0625rem;
  line-height: 1.68;
  color: var(--text-secondary);
  margin-bottom: 32px;
  max-width: 580px;
}
@media (max-width: 991px) {
  .hero-subtitle {
    margin-left: auto;
    margin-right: auto;
  }
}
@media (min-width: 768px) {
  .hero-subtitle {
    font-size: 1.15rem;
  }
}

.hero-buttons {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 36px;
}
@media (min-width: 540px) {
  .hero-buttons {
    flex-direction: row;
    justify-content: center;
  }
}
@media (min-width: 992px) {
  .hero-buttons {
    justify-content: flex-start;
  }
}

.hero-guarantee {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
  font-size: 0.875rem;
  color: var(--text-muted);
  justify-content: center;
}
@media (min-width: 992px) {
  .hero-guarantee {
    justify-content: flex-start;
  }
}
.hero-guarantee span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--text-secondary);
}
.hero-guarantee span svg {
  color: var(--aurora-teal);
}

/* 右侧矢量插画展示容器 */
.hero-visual-col {
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
}
.hero-visual-wrap {
  position: relative;
  width: 100%;
  max-width: 480px;
  aspect-ratio: 6 / 5;
  display: flex;
  align-items: center;
  justify-content: center;
}
.hero-visual-wrap img, .hero-visual-wrap svg {
  width: 100%;
  height: 100%;
  object-fit: contain;
  filter: drop-shadow(0 0 30px rgba(56, 189, 248, 0.35));
}
.hero-orbit-glow {
  position: absolute;
  width: 80%;
  height: 80%;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 245, 212, 0.2) 0%, rgba(168, 85, 247, 0.15) 50%, transparent 70%);
  filter: blur(20px);
  z-index: -1;
  animation: orbit-rotate 12s linear infinite;
}
@keyframes orbit-rotate {
  from { transform: rotate(0deg) scale(1); }
  50% { transform: rotate(180deg) scale(1.08); }
  to { transform: rotate(360deg) scale(1); }
}

/* ===================================================================
   通用区块排版规范
   =================================================================== */
.section {
  padding: 60px 0;
  border-bottom: 1px solid var(--border-glass);
  position: relative;
}
@media (min-width: 768px) {
  .section {
    padding: 84px 0;
  }
}
.section-alt {
  background-color: rgba(12, 18, 43, 0.55);
}

.section-header {
  text-align: center;
  max-width: 740px;
  margin: 0 auto 48px;
}
.section-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--aurora-teal);
  margin-bottom: 10px;
}
.section-title {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--text-pure);
  letter-spacing: -0.01em;
  margin-bottom: 14px;
}
@media (min-width: 768px) {
  .section-title {
    font-size: 2.25rem;
  }
}
.section-desc {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* ===================================================================
   3D 卡片倾斜与光斑跟随 (Features 特性网格)
   =================================================================== */
.features-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}
@media (min-width: 640px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (min-width: 1024px) {
  .features-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* 玻璃卡片：支持 3D 悬停透视 */
.tilt-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.25s ease, box-shadow 0.25s ease;
  transform-style: preserve-3d;
  will-change: transform;
}
.tilt-card:hover {
  border-color: var(--border-glow-teal);
  box-shadow: var(--shadow-card-hover);
}

/* 光斑跟随层 (动态注入 radial-gradient) */
.tilt-card::before {
  content: "";
  position: absolute;
  top: var(--spotlight-y, -100%);
  left: var(--spotlight-x, -100%);
  width: 250px;
  height: 250px;
  background: radial-gradient(circle, rgba(0, 245, 212, 0.15) 0%, transparent 70%);
  transform: translate(-50%, -50%);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.25s ease;
}
.tilt-card:hover::before {
  opacity: 1;
}

.feature-icon-box {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background: rgba(0, 245, 212, 0.1);
  color: var(--aurora-teal);
  border: 1px solid rgba(0, 245, 212, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  box-shadow: 0 0 14px rgba(0, 245, 212, 0.2);
  transition: transform var(--transition-smooth);
}
.tilt-card:hover .feature-icon-box {
  transform: scale(1.1) rotate(4deg);
}
.feature-card-title {
  font-size: 1.1875rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-pure);
}
.feature-card-desc {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ===================================================================
   流媒体支持模块 (Streaming Support)
   =================================================================== */
.streaming-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}
@media (min-width: 768px) {
  .streaming-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}
.streaming-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  position: relative;
  transition: border-color var(--transition-smooth), transform var(--transition-smooth);
}
.streaming-card:hover {
  border-color: var(--border-glow-violet);
  transform: translateY(-4px);
  box-shadow: 0 10px 28px rgba(168, 85, 247, 0.2);
}
.streaming-badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  background: rgba(168, 85, 247, 0.15);
  color: var(--stellar-violet);
  border: 1px solid rgba(168, 85, 247, 0.3);
  padding: 3px 10px;
  border-radius: var(--radius-full);
  margin-bottom: 14px;
}
.streaming-title {
  font-size: 1.1875rem;
  font-weight: 700;
  color: var(--text-pure);
  margin-bottom: 10px;
}
.streaming-desc {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 18px;
}
.streaming-meta {
  font-size: 0.8125rem;
  color: var(--aurora-teal);
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 6px;
}

/* ===================================================================
   Benefits 全天候多设备优势
   =================================================================== */
.benefits-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}
@media (min-width: 768px) {
  .benefits-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}
.benefit-item {
  border: 1px solid var(--border-glass);
  background-color: var(--bg-card);
  padding: 30px 24px;
  border-radius: var(--radius-md);
  position: relative;
  overflow: hidden;
  transition: border-color var(--transition-smooth), transform var(--transition-smooth);
}
.benefit-item:hover {
  border-color: var(--border-glow-teal);
  transform: translateY(-4px);
}
.benefit-number {
  font-size: 0.875rem;
  font-weight: 800;
  font-family: var(--font-mono);
  color: var(--aurora-teal);
  margin-bottom: 12px;
  letter-spacing: 0.05em;
}
.benefit-title {
  font-size: 1.1875rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-pure);
}
.benefit-desc {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ===================================================================
   AI 生产力深度支持区
   =================================================================== */
.ai-section-box {
  background: linear-gradient(135deg, rgba(16, 24, 54, 0.85) 0%, rgba(20, 31, 68, 0.75) 100%);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 36px 24px;
  box-shadow: var(--shadow-md);
  position: relative;
  overflow: hidden;
}
@media (min-width: 768px) {
  .ai-section-box {
    padding: 48px;
  }
}
.ai-columns {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
}
@media (min-width: 992px) {
  .ai-columns {
    grid-template-columns: 1.25fr 1fr;
    align-items: center;
  }
}
.ai-text h2 {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-pure);
  margin-bottom: 14px;
}
@media (min-width: 768px) {
  .ai-text h2 {
    font-size: 1.875rem;
  }
}
.ai-text p {
  color: var(--text-secondary);
  margin-bottom: 20px;
  font-size: 0.96875rem;
}
.ai-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.ai-list li {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-size: 0.9375rem;
  color: var(--text-main);
}
.ai-list li::before {
  content: "✦";
  color: var(--aurora-teal);
  font-size: 0.8125rem;
}
.ai-metrics-panel {
  background-color: rgba(7, 10, 24, 0.65);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: inset 0 0 15px rgba(0, 0, 0, 0.4);
}
.ai-metric-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 0;
  border-bottom: 1px solid var(--border-glass);
  font-size: 0.875rem;
}
.ai-metric-row:last-child {
  border-bottom: none;
}
.metric-name {
  color: var(--text-secondary);
}
.metric-val {
  font-weight: 700;
  color: var(--aurora-teal);
  font-family: var(--font-mono);
  letter-spacing: 0.02em;
}

/* ===================================================================
   Pricing 套餐定价区 (3档位 + 互动高亮状态)
   =================================================================== */
.pricing-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  align-items: stretch;
}
@media (min-width: 768px) {
  .pricing-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}
.pricing-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  padding: 36px 26px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: transform var(--transition-smooth), border-color var(--transition-smooth), box-shadow var(--transition-smooth);
}
.pricing-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-glow-teal);
  box-shadow: var(--shadow-card-hover);
}
.pricing-card.is-popular {
  border: 2px solid var(--aurora-teal);
  background: linear-gradient(180deg, rgba(20, 32, 68, 0.85) 0%, rgba(16, 24, 54, 0.95) 100%);
  box-shadow: 0 0 30px rgba(0, 245, 212, 0.25);
}
.pricing-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, var(--aurora-teal), var(--nebula-cyan));
  color: #070a18;
  font-size: 0.75rem;
  font-weight: 800;
  padding: 4px 16px;
  border-radius: var(--radius-full);
  white-space: nowrap;
  box-shadow: 0 0 12px var(--aurora-teal-glow);
  letter-spacing: 0.05em;
}
.pricing-audience {
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--aurora-teal);
  margin-bottom: 8px;
  letter-spacing: 0.02em;
}
.pricing-name {
  font-size: 1.375rem;
  font-weight: 800;
  color: var(--text-pure);
  margin-bottom: 14px;
}
.pricing-price-wrap {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 16px;
}
.pricing-currency {
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--aurora-teal);
}
.pricing-num {
  font-size: 2.625rem;
  font-weight: 800;
  color: var(--text-pure);
  line-height: 1;
  font-family: var(--font-mono);
}
.pricing-period {
  font-size: 0.875rem;
  color: var(--text-muted);
}
.pricing-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: 26px;
  line-height: 1.55;
}
.pricing-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 32px;
  flex-grow: 1;
}
.pricing-features li {
  font-size: 0.90625rem;
  color: var(--text-main);
  display: flex;
  align-items: flex-start;
  gap: 10px;
}
.pricing-features li svg {
  flex-shrink: 0;
  margin-top: 3px;
  color: var(--aurora-teal);
}

/* ===================================================================
   使用场景卡 (4张卡，替代虚构用户评价)
   =================================================================== */
.scenarios-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}
@media (min-width: 640px) {
  .scenarios-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (min-width: 1024px) {
  .scenarios-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}
.scenario-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: border-color var(--transition-smooth), transform var(--transition-smooth);
}
.scenario-card:hover {
  border-color: var(--border-glow-pink);
  transform: translateY(-4px);
  box-shadow: 0 10px 24px rgba(244, 63, 94, 0.2);
}
.scenario-title {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text-pure);
}
.scenario-device {
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--sakura-pink);
  background: rgba(244, 63, 94, 0.12);
  border: 1px solid rgba(244, 63, 94, 0.25);
  display: inline-block;
  padding: 2px 10px;
  border-radius: var(--radius-sm);
  margin-bottom: 14px;
}
.scenario-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ===================================================================
   FAQ 手风琴折叠答疑
   =================================================================== */
.faq-list {
  max-width: 840px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.faq-item {
  border: 1px solid var(--border-glass);
  background-color: var(--bg-card);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--transition-smooth);
}
.faq-item.is-active {
  border-color: var(--border-glow-teal);
  box-shadow: 0 4px 16px rgba(0, 245, 212, 0.15);
}
.faq-question {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 24px;
  background: transparent;
  border: none;
  text-align: left;
  font-size: 1.03125rem;
  font-weight: 700;
  color: var(--text-pure);
  cursor: pointer;
  font-family: inherit;
  transition: color var(--transition-smooth);
}
.faq-question:hover {
  color: var(--aurora-teal);
}
.faq-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  transition: transform 0.25s ease, color var(--transition-smooth);
  color: var(--text-muted);
}
.faq-item.is-active .faq-icon {
  transform: rotate(180deg);
  color: var(--aurora-teal);
}
.faq-answer {
  display: none;
  padding: 0 24px 22px;
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.68;
}
.faq-item.is-active .faq-answer {
  display: block;
}

/* ===================================================================
   Final CTA 底部主行动区 (极光星渊大卡片)
   =================================================================== */
.final-cta-section {
  padding: 72px 0;
  background: linear-gradient(180deg, rgba(12, 18, 43, 0.8) 0%, rgba(7, 10, 24, 1) 100%);
  position: relative;
  overflow: hidden;
}
.final-cta-box {
  text-align: center;
  max-width: 720px;
  margin: 0 auto;
  padding: 56px 28px;
  background: radial-gradient(circle at 50% 30%, rgba(56, 189, 248, 0.15) 0%, rgba(16, 24, 54, 0.8) 70%);
  border: 1px solid var(--border-glow-teal);
  border-radius: var(--radius-lg);
  box-shadow: 0 0 35px rgba(0, 245, 212, 0.2);
}
.final-cta-title {
  font-size: 1.875rem;
  font-weight: 800;
  margin-bottom: 16px;
  color: var(--text-pure);
  letter-spacing: -0.01em;
}
@media (min-width: 768px) {
  .final-cta-title {
    font-size: 2.25rem;
  }
}
.final-cta-desc {
  font-size: 1.03125rem;
  color: var(--text-secondary);
  margin-bottom: 32px;
  line-height: 1.65;
}

/* ===================================================================
   底部页脚 Footer (极简深邃 + 联盟披露)
   =================================================================== */
.site-footer {
  background-color: #04060e;
  color: var(--text-muted);
  padding: 56px 0 32px;
  font-size: 0.875rem;
  border-top: 1px solid rgba(56, 189, 248, 0.12);
  margin-top: auto;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
  margin-bottom: 44px;
}
@media (min-width: 768px) {
  .footer-grid {
    grid-template-columns: 1.6fr 1fr 1fr;
  }
}
.footer-brand h4 {
  color: var(--text-pure);
  font-size: 1.125rem;
  font-weight: 800;
  margin-bottom: 14px;
}
.footer-brand p {
  line-height: 1.65;
  max-width: 380px;
  margin-bottom: 12px;
}
.footer-disclosure {
  color: var(--starlight-gold);
  font-size: 0.8125rem;
  display: inline-block;
  padding: 2px 8px;
  background: rgba(251, 191, 36, 0.08);
  border-radius: var(--radius-sm);
  border: 1px solid rgba(251, 191, 36, 0.2);
}
.footer-col h5 {
  color: var(--text-pure);
  font-size: 0.9375rem;
  font-weight: 700;
  margin-bottom: 16px;
}
.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.footer-links a {
  color: var(--text-secondary);
}
.footer-links a:hover {
  color: var(--aurora-teal);
  text-decoration: underline;
}
.footer-bottom {
  padding-top: 28px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  display: flex;
  flex-direction: column;
  gap: 12px;
  text-align: center;
  font-size: 0.8125rem;
  color: var(--text-muted);
}
@media (min-width: 768px) {
  .footer-bottom {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
}

/* ===================================================================
   移动端吸底操作栏 (Sticky Bottom Action Bar)
   =================================================================== */
.mobile-bottom-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: rgba(7, 10, 24, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-top: 1px solid var(--border-glass);
  padding: 10px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  z-index: 990;
  box-shadow: 0 -4px 16px rgba(0, 0, 0, 0.4);
}
@media (min-width: 768px) {
  .mobile-bottom-bar {
    display: none;
  }
}
.mobile-bottom-bar .bottom-text {
  font-size: 0.8125rem;
  line-height: 1.35;
}
.mobile-bottom-bar .bottom-text strong {
  display: block;
  color: var(--text-pure);
}
.mobile-bottom-bar .bottom-text span {
  color: var(--aurora-teal);
}
.mobile-bottom-bar .btn {
  flex-shrink: 0;
}

/* ===================================================================
   独立文章与指南排版 (About / Legal / Guides / SEO 文章)
   =================================================================== */
.page-wrapper {
  padding: 44px 0 72px;
}
@media (min-width: 768px) {
  .page-wrapper {
    padding: 64px 0 96px;
  }
}

.article-shell {
  max-width: 840px;
  margin: 0 auto;
}

.breadcrumb-nav {
  margin-bottom: 26px;
}
.breadcrumb-list {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.875rem;
  color: var(--text-muted);
}
.breadcrumb-separator {
  color: var(--text-muted);
}
.breadcrumb-item a {
  color: var(--text-secondary);
}
.breadcrumb-item a:hover {
  color: var(--aurora-teal);
}
.breadcrumb-item[aria-current="page"] {
  color: var(--aurora-teal);
  font-weight: 700;
}

.article-header {
  border-bottom: 1px solid var(--border-glass);
  padding-bottom: 26px;
  margin-bottom: 36px;
}
.article-title {
  font-size: 1.875rem;
  font-weight: 800;
  line-height: 1.32;
  color: var(--text-pure);
  letter-spacing: -0.01em;
  margin-bottom: 16px;
}
@media (min-width: 768px) {
  .article-title {
    font-size: 2.375rem;
  }
}
.article-meta-bar {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 0.875rem;
  color: var(--text-muted);
  flex-wrap: wrap;
}

.article-content {
  font-size: 1.03125rem;
  line-height: 1.85;
  color: #cbd5e1;
}
.article-content p {
  margin-bottom: 22px;
}
.article-content h2 {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-pure);
  margin-top: 44px;
  margin-bottom: 18px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-glass);
}
.article-content h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-pure);
  margin-top: 30px;
  margin-bottom: 14px;
}
.article-content ul, .article-content ol {
  margin-bottom: 24px;
  padding-left: 26px;
}
.article-content li {
  margin-bottom: 10px;
}
.article-content strong {
  color: var(--text-pure);
  font-weight: 700;
}
.article-content blockquote {
  border-left: 4px solid var(--aurora-teal);
  background-color: var(--bg-card);
  padding: 18px 24px;
  margin: 28px 0;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--text-secondary);
  font-size: 0.96875rem;
}

/* 响应式数据表格 */
.table-responsive {
  width: 100%;
  overflow-x: auto;
  margin: 32px 0;
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  background-color: var(--bg-card);
}
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9375rem;
  text-align: left;
}
.data-table th, .data-table td {
  padding: 14px 18px;
  border-bottom: 1px solid var(--border-glass);
}
.data-table th {
  background-color: rgba(7, 10, 24, 0.85);
  font-weight: 700;
  color: var(--aurora-teal);
}
.data-table tr:last-child td {
  border-bottom: none;
}
.data-table tr:hover td {
  background-color: rgba(255, 255, 255, 0.03);
}

/* 文末 CTA 挂件 */
.article-end-cta {
  background: linear-gradient(135deg, rgba(16, 24, 54, 0.9) 0%, rgba(24, 36, 78, 0.9) 100%);
  border: 1px solid var(--border-glow-teal);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  margin: 44px 0;
  text-align: center;
  box-shadow: 0 0 24px rgba(0, 245, 212, 0.15);
}
.article-end-cta h3 {
  font-size: 1.375rem;
  font-weight: 800;
  color: var(--text-pure);
  margin-bottom: 12px;
}
.article-end-cta p {
  color: var(--text-secondary);
  font-size: 0.9375rem;
  margin-bottom: 22px;
}

/* 站内互链卡片 */
.internal-links-box {
  background-color: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  padding: 26px;
  margin-top: 40px;
}
.internal-links-box h4 {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text-pure);
  margin-bottom: 16px;
}
.internal-links-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.internal-links-list a {
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--text-main);
}
.internal-links-list a:hover {
  color: var(--aurora-teal);
}

/* 指南列表卡片 (guides.html) */
.guides-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}
@media (min-width: 640px) {
  .guides-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (min-width: 1024px) {
  .guides-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}
.guide-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  transition: border-color var(--transition-smooth), transform var(--transition-smooth), box-shadow var(--transition-smooth);
}
.guide-card:hover {
  border-color: var(--border-glow-teal);
  transform: translateY(-5px);
  box-shadow: var(--shadow-card-hover);
}
.guide-category {
  font-size: 0.75rem;
  font-weight: 800;
  color: var(--aurora-teal);
  margin-bottom: 12px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.guide-card-title {
  font-size: 1.21875rem;
  font-weight: 700;
  line-height: 1.42;
  margin-bottom: 12px;
}
.guide-card-title a {
  color: var(--text-pure);
  text-decoration: none;
}
.guide-card-title a:hover {
  color: var(--aurora-teal);
}
.guide-card-excerpt {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 24px;
  flex-grow: 1;
}
.guide-card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8125rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border-glass);
  padding-top: 14px;
}

/* HTML 网站地图 (sitemap.html) */
.sitemap-group {
  margin-bottom: 36px;
}
.sitemap-group h2 {
  font-size: 1.3125rem;
  font-weight: 800;
  color: var(--text-pure);
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-glass);
}
.sitemap-list {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}
@media (min-width: 640px) {
  .sitemap-list {
    grid-template-columns: repeat(2, 1fr);
  }
}
.sitemap-list li a {
  display: inline-block;
  padding: 6px 0;
  font-size: 0.9375rem;
  color: var(--text-main);
}
.sitemap-list li a:hover {
  color: var(--aurora-teal);
}

/* ===================================================================
   滚动显现动画 (Scroll Reveal Classes)
   =================================================================== */
.reveal-on-scroll {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1), transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}
.reveal-on-scroll.is-revealed {
  opacity: 1;
  transform: translateY(0);
}

/* 支持 prefers-reduced-motion 无障碍 */
@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;
  }
  .reveal-on-scroll {
    opacity: 1 !important;
    transform: none !important;
  }
  .tilt-card {
    transform: none !important;
  }
  #stardust-canvas {
    display: none !important;
  }
}