/* ===================================================================
   仙路湾加速 - 动漫暮光天际与星盘跃迁 UI 视觉设计 (style.css)
   Anime Twilight Horizon & Arcane Astral Compass Theme
   设计语言：深空暮光底色 · 星辉青蓝与幻紫光芒 · 魔法星盘矩阵 · 玻璃质感 · 动态微光
   =================================================================== */

:root {
  /* 基础色板：深邃星空暮光与冷色调科幻魔法 */
  --color-bg: #090d1a;
  --color-bg-alt: #0e152b;
  --color-surface: rgba(17, 24, 48, 0.75);
  --color-surface-hover: rgba(24, 34, 68, 0.88);
  --color-surface-solid: #111830;
  
  --color-text-main: #f1f5f9;
  --color-text-muted: #94a3b8;
  --color-text-light: #64748b;
  
  --color-border: rgba(99, 102, 241, 0.22);
  --color-border-hover: rgba(6, 182, 212, 0.55);
  --color-border-active: #06b6d4;

  /* 主题色系：星辉青蓝 + 幻境深紫 + 金色星尘点缀 */
  --color-primary: #0284c7;
  --color-primary-glow: #06b6d4;
  --color-accent-purple: #8b5cf6;
  --color-accent-gold: #fbbf24;
  --color-accent-pink: #ec4899;
  --color-success: #10b981;
  --color-success-bg: rgba(16, 185, 129, 0.15);

  --gradient-brand: linear-gradient(135deg, #0284c7 0%, #06b6d4 50%, #8b5cf6 100%);
  --gradient-card: linear-gradient(180deg, rgba(23, 32, 65, 0.8) 0%, rgba(14, 20, 42, 0.8) 100%);
  --gradient-glow: radial-gradient(circle at center, rgba(6, 182, 212, 0.15) 0%, transparent 70%);
  
  --font-family: -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;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-pill: 9999px;

  --shadow-subtle: 0 4px 12px rgba(0, 0, 0, 0.3);
  --shadow-glow-cyan: 0 0 25px rgba(6, 182, 212, 0.25);
  --shadow-glow-purple: 0 0 30px rgba(139, 92, 246, 0.2);
  --shadow-card: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
  --shadow-hover: 0 14px 40px -10px rgba(6, 182, 212, 0.3);

  --max-width: 1140px;
  --article-width: 820px;
}

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

html {
  font-family: var(--font-family);
  background-color: var(--color-bg);
  color: var(--color-text-main);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow-x: hidden;
  background: 
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(99, 102, 241, 0.22), transparent),
    radial-gradient(circle at 15% 25%, rgba(6, 182, 212, 0.12), transparent 45%),
    radial-gradient(circle at 85% 65%, rgba(139, 92, 246, 0.12), transparent 50%),
    var(--color-bg);
}

main {
  flex: 1;
  position: relative;
  z-index: 2;
}

a {
  color: var(--color-primary-glow);
  text-decoration: none;
  transition: all 0.2s ease;
}

a:hover {
  color: #38bdf8;
  text-shadow: 0 0 10px rgba(56, 189, 248, 0.5);
  text-decoration: none;
}

:focus-visible {
  outline: 2px solid var(--color-primary-glow);
  outline-offset: 3px;
}

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;
}

/* ===================================================================
   Ambient Anime Elements: 飘落星尘与花瓣粒子 (Pure CSS / Lightweight)
   =================================================================== */

.celestial-particles-wrap {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 1;
  overflow: hidden;
}

.anime-dust-particle {
  position: absolute;
  border-radius: 50%;
  background: radial-gradient(circle, #ffffff 0%, rgba(6, 182, 212, 0.8) 60%, transparent 100%);
  opacity: 0.6;
  filter: blur(0.5px);
  animation: floatUpAndDrift linear infinite;
}

.anime-dust-particle:nth-child(1) { width: 3px; height: 3px; left: 10%; bottom: -10px; animation-duration: 18s; animation-delay: 0s; }
.anime-dust-particle:nth-child(2) { width: 4px; height: 4px; left: 25%; bottom: -10px; animation-duration: 22s; animation-delay: 3s; background: radial-gradient(circle, #ffffff, rgba(139, 92, 246, 0.8), transparent); }
.anime-dust-particle:nth-child(3) { width: 2px; height: 2px; left: 45%; bottom: -10px; animation-duration: 16s; animation-delay: 5s; }
.anime-dust-particle:nth-child(4) { width: 5px; height: 5px; left: 65%; bottom: -10px; animation-duration: 25s; animation-delay: 1s; background: radial-gradient(circle, #fff, rgba(251, 191, 36, 0.8), transparent); }
.anime-dust-particle:nth-child(5) { width: 3px; height: 3px; left: 80%; bottom: -10px; animation-duration: 19s; animation-delay: 7s; }
.anime-dust-particle:nth-child(6) { width: 4px; height: 4px; left: 92%; bottom: -10px; animation-duration: 23s; animation-delay: 2s; }

@keyframes floatUpAndDrift {
  0% {
    transform: translateY(0) translateX(0) scale(0.8);
    opacity: 0;
  }
  20% {
    opacity: 0.8;
  }
  80% {
    opacity: 0.6;
  }
  100% {
    transform: translateY(-110vh) translateX(50px) scale(1.2);
    opacity: 0;
  }
}

/* 动漫灵能背景网格线 */
.anime-grid-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: 
    linear-gradient(rgba(99, 102, 241, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(99, 102, 241, 0.04) 1px, transparent 1px);
  background-size: 40px 40px;
  mask-image: radial-gradient(ellipse at 50% 30%, rgba(0, 0, 0, 1) 0%, rgba(0, 0, 0, 0) 75%);
  -webkit-mask-image: radial-gradient(ellipse at 50% 30%, rgba(0, 0, 0, 1) 0%, rgba(0, 0, 0, 0) 75%);
  pointer-events: none;
}

/* ===================================================================
   Header & Navigation
   =================================================================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background-color: rgba(9, 13, 26, 0.85);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--color-border);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.brand-logo {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--color-text-main);
  min-height: 44px;
}

.brand-logo-icon-wrap {
  position: relative;
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.brand-logo-text {
  font-size: 1.3125rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, #ffffff 30%, #38bdf8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand-badge {
  font-size: 0.75rem;
  font-weight: 700;
  background: rgba(6, 182, 212, 0.12);
  color: var(--color-primary-glow);
  padding: 3px 10px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(6, 182, 212, 0.35);
  box-shadow: 0 0 10px rgba(6, 182, 212, 0.15);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 10px;
}

.nav-link {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-text-muted);
  text-decoration: none;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  padding: 0 12px;
  border-radius: var(--radius-sm);
  transition: all 0.2s ease;
}

.nav-link:hover, .nav-link.active {
  color: #38bdf8;
  background: rgba(255, 255, 255, 0.04);
}

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

.menu-toggle {
  display: none;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 8px 12px;
  cursor: pointer;
  color: var(--color-text-main);
  min-height: 44px;
  min-width: 44px;
  align-items: center;
  justify-content: center;
}

/* ===================================================================
   CTA 按钮高转化视觉与光泽扫过动画 (High-Conversion Energy CTA)
   =================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 0.9375rem;
  font-weight: 700;
  line-height: 1;
  padding: 12px 24px;
  min-height: 44px;
  min-width: 44px;
  border-radius: var(--radius-md);
  text-decoration: none;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  border: 1px solid transparent;
}

/* 动漫能量光效主按钮 */
.btn-primary {
  background: var(--gradient-brand);
  color: #ffffff;
  border-color: rgba(255, 255, 255, 0.2);
  box-shadow: 0 4px 18px rgba(2, 132, 199, 0.4), 0 0 12px rgba(6, 182, 212, 0.3);
}

.btn-primary::after {
  content: '';
  position: absolute;
  top: -50%;
  left: -60%;
  width: 40%;
  height: 200%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
  transform: rotate(30deg);
  animation: btnSheenSweep 4.5s infinite;
}

@keyframes btnSheenSweep {
  0%, 65% {
    left: -60%;
  }
  100% {
    left: 140%;
  }
}

.btn-primary:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 6px 26px rgba(2, 132, 199, 0.6), 0 0 20px rgba(6, 182, 212, 0.5);
  color: #ffffff;
}

.btn-primary:active {
  transform: translateY(1px) scale(0.98);
}

/* 次要通透玻璃按钮 */
.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  color: var(--color-text-main);
  border: 1px solid var(--color-border);
  backdrop-filter: blur(8px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--color-border-hover);
  color: #38bdf8;
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.btn-lg {
  padding: 14px 32px;
  font-size: 1.0625rem;
  min-height: 50px;
  border-radius: var(--radius-lg);
}

.btn-block {
  width: 100%;
}

/* ===================================================================
   Hero Section: 动漫暮光星盘与时空跃迁主视觉
   =================================================================== */

.hero-section {
  padding: 70px 0 60px;
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--color-border);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.95fr;
  gap: 40px;
  align-items: center;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(99, 102, 241, 0.15);
  border: 1px solid rgba(99, 102, 241, 0.35);
  padding: 4px 14px;
  border-radius: var(--radius-pill);
  font-size: 0.8125rem;
  font-weight: 700;
  color: #a5b4fc;
  margin-bottom: 20px;
}

.hero-title {
  font-size: 2.5rem;
  line-height: 1.25;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: #ffffff;
  margin-bottom: 18px;
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.6);
}

.hero-subtitle {
  font-size: 1.125rem;
  line-height: 1.65;
  color: var(--color-text-muted);
  margin-bottom: 28px;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 28px;
}

.hero-meta-points {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  font-size: 0.875rem;
  color: var(--color-text-muted);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 20px;
}

.hero-meta-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.hero-meta-item svg {
  color: var(--color-success);
  filter: drop-shadow(0 0 6px rgba(16, 185, 129, 0.4));
}

/* 动漫魔法星盘与仪表板容器 */
.hero-visual-card {
  position: relative;
  background: var(--gradient-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 26px;
  box-shadow: var(--shadow-card), var(--shadow-glow-cyan);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

/* 动漫 HUD 边角装饰标记 */
.corner-hud-mark {
  position: absolute;
  width: 10px;
  height: 10px;
  border-color: var(--color-primary-glow);
  pointer-events: none;
}
.corner-tl { top: -1px; left: -1px; border-top: 2px solid var(--color-primary-glow); border-left: 2px solid var(--color-primary-glow); border-top-left-radius: var(--radius-lg); }
.corner-tr { top: -1px; right: -1px; border-top: 2px solid var(--color-primary-glow); border-right: 2px solid var(--color-primary-glow); border-top-right-radius: var(--radius-lg); }
.corner-bl { bottom: -1px; left: -1px; border-bottom: 2px solid var(--color-primary-glow); border-left: 2px solid var(--color-primary-glow); border-bottom-left-radius: var(--radius-lg); }
.corner-br { bottom: -1px; right: -1px; border-bottom: 2px solid var(--color-primary-glow); border-right: 2px solid var(--color-primary-glow); border-bottom-right-radius: var(--radius-lg); }

/* 动漫旋转星盘罗盘 SVG 动画 */
.astral-compass-wrap {
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  margin-bottom: 20px;
  position: relative;
}

.astral-ring-outer {
  animation: spinSlow 36s linear infinite;
  transform-origin: center;
}

.astral-ring-inner {
  animation: spinReverse 24s linear infinite;
  transform-origin: center;
}

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

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

.status-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.status-indicator {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--color-success);
}

.indicator-dot {
  width: 8px;
  height: 8px;
  background-color: var(--color-success);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--color-success);
  animation: pulseDot 2s infinite ease-in-out;
}

@keyframes pulseDot {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.3); opacity: 0.6; }
}

.status-metric-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.status-metric-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.875rem;
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.04);
}

.status-metric-label {
  color: var(--color-text-muted);
}

.status-metric-val {
  font-family: var(--font-mono);
  font-weight: 700;
  color: #ffffff;
}

.latency-good {
  color: var(--color-success);
  text-shadow: 0 0 8px rgba(16, 185, 129, 0.4);
}

/* ===================================================================
   Section Shared Layouts
   =================================================================== */

.section {
  padding: 68px 0;
  position: relative;
  border-bottom: 1px solid var(--color-border);
}

.section-alt {
  background-color: rgba(14, 21, 43, 0.45);
}

.section-head {
  max-width: 720px;
  margin-bottom: 42px;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--color-primary-glow);
  background: rgba(6, 182, 212, 0.1);
  border: 1px solid rgba(6, 182, 212, 0.3);
  padding: 3px 10px;
  border-radius: var(--radius-pill);
  margin-bottom: 12px;
}

.section-title {
  font-size: 2rem;
  line-height: 1.3;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 10px;
}

.section-lead {
  font-size: 1.0625rem;
  color: var(--color-text-muted);
}

/* ===================================================================
   Module 1: Benefits (为什么选择物理专线/核心优势)
   =================================================================== */

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

.benefit-card {
  background: var(--gradient-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  position: relative;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: var(--shadow-card);
}

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

.benefit-icon-badge {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, rgba(6, 182, 212, 0.2), rgba(139, 92, 246, 0.2));
  border: 1px solid rgba(6, 182, 212, 0.35);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary-glow);
  margin-bottom: 18px;
}

.benefit-card-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 10px;
}

.benefit-card-text {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.65;
}

/* ===================================================================
   Module 2: AI 支持 (全生态大模型极速响应)
   =================================================================== */

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

.ai-item {
  background: var(--gradient-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: all 0.25s ease;
  position: relative;
}

.ai-item:hover {
  border-color: rgba(139, 92, 246, 0.6);
  transform: translateY(-4px);
  box-shadow: 0 10px 30px rgba(139, 92, 246, 0.15);
}

.ai-icon-circle {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(139, 92, 246, 0.15);
  border: 1px solid rgba(139, 92, 246, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #c084fc;
  margin-bottom: 14px;
}

.ai-item-name {
  font-size: 1.0625rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: #ffffff;
}

.ai-item-desc {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ===================================================================
   Module 3: Features (多维技术特性 - 4 cards)
   =================================================================== */

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

.feature-box {
  background: var(--gradient-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 26px;
  position: relative;
  transition: all 0.3s ease;
}

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

.feature-icon-badge {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: rgba(6, 182, 212, 0.12);
  border: 1px solid rgba(6, 182, 212, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary-glow);
  margin-bottom: 16px;
}

.feature-box-title {
  font-size: 1.125rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 8px;
}

.feature-box-desc {
  font-size: 0.90625rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ===================================================================
   Module 4: Streaming (全球主流流媒体支持)
   =================================================================== */

.stream-table-wrap {
  background: var(--gradient-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow-x: auto;
  box-shadow: var(--shadow-card);
}

.stream-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.9375rem;
}

.stream-table th, .stream-table td {
  padding: 16px 20px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.stream-table th {
  background-color: rgba(255, 255, 255, 0.04);
  font-weight: 700;
  color: #ffffff;
}

.stream-table tr:last-child td {
  border-bottom: none;
}

.stream-table tbody tr:hover {
  background-color: rgba(255, 255, 255, 0.02);
}

.stream-badge {
  display: inline-block;
  font-size: 0.75rem;
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  background-color: var(--color-success-bg);
  color: var(--color-success);
  border: 1px solid rgba(16, 185, 129, 0.3);
  font-weight: 700;
  text-shadow: 0 0 8px rgba(16, 185, 129, 0.3);
}

/* ===================================================================
   Module 5: Use Scenarios (真实使用场景卡)
   =================================================================== */

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

.scenario-card {
  background: var(--gradient-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

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

.scenario-tag-badge {
  position: absolute;
  top: 20px;
  right: 20px;
  font-size: 0.75rem;
  padding: 2px 8px;
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.06);
  color: var(--color-text-muted);
}

.scenario-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 8px;
}

.scenario-device {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-primary-glow);
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px dashed rgba(255, 255, 255, 0.1);
}

.scenario-desc {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.65;
}

/* ===================================================================
   Module 6: Pricing (透明订阅方案 - 3 tiers)
   =================================================================== */

.pricing-interactive-toggle {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 12px;
  margin-bottom: 36px;
}

.pricing-toggle-btn {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  padding: 8px 18px;
  border-radius: var(--radius-pill);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  min-height: 44px;
}

.pricing-toggle-btn.active {
  background: var(--gradient-brand);
  color: #ffffff;
  border-color: transparent;
  box-shadow: 0 0 15px rgba(6, 182, 212, 0.4);
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
  align-items: stretch;
}

.pricing-card {
  background: var(--gradient-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px 26px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: var(--shadow-card);
}

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

.pricing-card.featured {
  border-color: var(--color-primary-glow);
  background: linear-gradient(180deg, rgba(30, 41, 78, 0.85) 0%, rgba(18, 26, 52, 0.85) 100%);
  box-shadow: 0 0 0 1px var(--color-primary-glow), 0 12px 40px rgba(6, 182, 212, 0.25);
}

.pricing-featured-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--gradient-brand);
  color: #ffffff;
  font-size: 0.75rem;
  font-weight: 800;
  padding: 4px 16px;
  border-radius: var(--radius-pill);
  box-shadow: 0 0 15px rgba(6, 182, 212, 0.5);
  letter-spacing: 0.03em;
}

.pricing-name {
  font-size: 1.375rem;
  font-weight: 800;
  margin-bottom: 6px;
  color: #ffffff;
}

.pricing-target {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-bottom: 20px;
  min-height: 40px;
}

.pricing-cost {
  margin-bottom: 22px;
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.pricing-currency {
  font-size: 1.25rem;
  font-weight: 700;
  color: #38bdf8;
}

.pricing-amount {
  font-size: 2.75rem;
  font-weight: 900;
  color: #ffffff;
  line-height: 1;
}

.pricing-period {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
}

.pricing-feature-list {
  list-style: none;
  margin-bottom: 28px;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 12px;
  font-size: 0.90625rem;
  color: var(--color-text-muted);
}

.pricing-feature-item {
  display: flex;
  align-items: center;
  gap: 10px;
}

.pricing-feature-item svg {
  color: var(--color-success);
  flex-shrink: 0;
  filter: drop-shadow(0 0 4px rgba(16, 185, 129, 0.5));
}

/* ===================================================================
   Module 7: FAQ (常见问题解答)
   =================================================================== */

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
  max-width: 840px;
}

.faq-card {
  background: var(--gradient-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color 0.2s ease;
}

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

.faq-question {
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  padding: 18px 22px;
  font-size: 1.0625rem;
  font-weight: 700;
  color: #ffffff;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: inherit;
  min-height: 48px;
}

.faq-icon {
  font-size: 1.35rem;
  font-weight: 400;
  color: var(--color-primary-glow);
  transition: transform 0.25s ease;
}

.faq-card.open .faq-icon {
  transform: rotate(45deg);
}

.faq-answer {
  display: none;
  padding: 0 22px 20px;
  font-size: 0.96875rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 14px;
}

.faq-card.open .faq-answer {
  display: block;
}

/* ===================================================================
   Final CTA
   =================================================================== */

.final-cta-section {
  padding: 76px 0;
  position: relative;
  background: radial-gradient(circle at center, rgba(6, 182, 212, 0.12), transparent 70%), var(--color-bg-alt);
  border-bottom: 1px solid var(--color-border);
  text-align: center;
}

.final-cta-inner {
  max-width: 680px;
  margin: 0 auto;
}

.final-cta-title {
  font-size: 2.25rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 14px;
  text-shadow: 0 0 20px rgba(6, 182, 212, 0.3);
}

.final-cta-desc {
  font-size: 1.0625rem;
  color: var(--color-text-muted);
  margin-bottom: 28px;
}

.final-cta-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
}

/* ===================================================================
   Footer
   =================================================================== */

.site-footer {
  background-color: #070a14;
  border-top: 1px solid var(--color-border);
  padding: 52px 0 36px;
  margin-top: auto;
  position: relative;
  z-index: 2;
}

.footer-top {
  display: grid;
  grid-template-columns: 1.5fr 2fr;
  gap: 36px;
  padding-bottom: 36px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-desc {
  margin-top: 14px;
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.65;
  max-width: 400px;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 16px 22px;
  align-items: center;
}

.footer-link {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  text-decoration: none;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  padding: 0 4px;
  transition: color 0.15s ease;
}

.footer-link:hover {
  color: #38bdf8;
  text-decoration: underline;
}

.footer-bottom {
  padding-top: 26px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 0.8125rem;
  color: var(--color-text-light);
}

.footer-disclosure {
  line-height: 1.5;
}

/* ===================================================================
   Content Pages & Article Layout (guides, about, legal, articles)
   =================================================================== */

.page-header {
  padding: 44px 0 28px;
  background: radial-gradient(ellipse at top, rgba(99, 102, 241, 0.15), transparent 70%);
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 36px;
}

.breadcrumb-nav {
  font-size: 0.84375rem;
  color: var(--color-text-light);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.breadcrumb-sep {
  color: rgba(255, 255, 255, 0.2);
}

.page-title {
  font-size: 2.25rem;
  font-weight: 800;
  line-height: 1.25;
  color: #ffffff;
  margin-bottom: 12px;
}

.page-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  font-size: 0.84375rem;
  color: var(--color-text-muted);
}

.article-container {
  max-width: var(--article-width);
  margin: 0 auto;
  padding-bottom: 60px;
}

.article-lead {
  font-size: 1.0625rem;
  line-height: 1.75;
  color: #cbd5e1;
  background: var(--gradient-card);
  border-left: 4px solid var(--color-primary-glow);
  padding: 18px 24px;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin-bottom: 36px;
  border: 1px solid var(--color-border);
  border-left-width: 4px;
}

.article-content h2 {
  font-size: 1.5rem;
  font-weight: 800;
  color: #ffffff;
  margin-top: 40px;
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-border);
}

.article-content h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: #38bdf8;
  margin-top: 26px;
  margin-bottom: 12px;
}

.article-content p {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--color-text-main);
  margin-bottom: 20px;
}

.article-content ul, .article-content ol {
  margin-bottom: 20px;
  padding-left: 26px;
  font-size: 1rem;
  line-height: 1.75;
  color: var(--color-text-main);
}

.article-content li {
  margin-bottom: 8px;
}

.article-faq-box {
  background: var(--gradient-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 26px;
  margin: 40px 0;
}

.article-faq-box h2 {
  margin-top: 0;
  border-bottom: none;
  font-size: 1.3rem;
  margin-bottom: 18px;
}

.article-faq-item {
  margin-bottom: 18px;
  padding-bottom: 18px;
  border-bottom: 1px dashed rgba(255, 255, 255, 0.1);
}

.article-faq-item:last-child {
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: none;
}

.article-faq-item h4 {
  font-size: 1rem;
  font-weight: 700;
  color: #38bdf8;
  margin-bottom: 8px;
}

.article-faq-item p {
  margin-bottom: 0;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
}

.article-cta-box {
  background: radial-gradient(circle at center, rgba(6, 182, 212, 0.18), transparent 80%), var(--gradient-card);
  border: 1px solid var(--color-primary-glow);
  border-radius: var(--radius-lg);
  padding: 32px;
  text-align: center;
  margin: 40px 0;
  box-shadow: 0 0 25px rgba(6, 182, 212, 0.2);
}

.article-cta-box h3 {
  font-size: 1.35rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 10px;
}

.article-cta-box p {
  font-size: 0.96875rem;
  color: var(--color-text-muted);
  margin-bottom: 22px;
}

.article-links-box {
  background: var(--gradient-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-top: 40px;
}

.article-links-title {
  font-size: 1.125rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 14px;
}

.article-links-list {
  list-style: none;
  padding-left: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.article-links-list li a {
  font-size: 0.96875rem;
  color: var(--color-primary-glow);
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

/* ===================================================================
   Guides List Grid (guides.html)
   =================================================================== */

.guides-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 26px;
  margin-bottom: 44px;
}

.guide-card {
  background: var(--gradient-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: var(--shadow-card);
}

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

.guide-card-title {
  font-size: 1.25rem;
  font-weight: 800;
  margin-bottom: 12px;
}

.guide-card-title a {
  color: #ffffff;
  text-decoration: none;
}

.guide-card-title a:hover {
  color: #38bdf8;
}

.guide-card-desc {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.65;
  margin-bottom: 18px;
  flex: 1;
}

.guide-card-meta {
  font-size: 0.8125rem;
  color: var(--color-text-light);
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 14px;
}

/* ===================================================================
   Mobile Sticky Bar
   =================================================================== */

.mobile-sticky-bar {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: rgba(9, 13, 26, 0.94);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-top: 1px solid var(--color-border);
  padding: 10px 16px;
  z-index: 99;
  transform: translateY(100%);
  transition: transform 0.25s ease;
  box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.5);
}

.mobile-sticky-bar.visible {
  transform: translateY(0);
}

.mobile-sticky-bar .btn {
  width: 100%;
}

/* ===================================================================
   Scroll Reveal 滚动出现动画
   =================================================================== */

.reveal-on-scroll {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease-out, transform 0.5s ease-out;
}

.reveal-on-scroll.revealed {
  opacity: 1;
  transform: translateY(0);
}

/* ===================================================================
   Accessibility: Reduced Motion
   =================================================================== */

@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;
  }
}

/* ===================================================================
   Responsive Breakpoints
   =================================================================== */

@media (max-width: 900px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }
  .pricing-grid, .scenarios-grid, .benefits-grid {
    grid-template-columns: 1fr;
  }
  .features-grid, .ai-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .guides-grid {
    grid-template-columns: 1fr;
  }
  .footer-top {
    grid-template-columns: 1fr;
  }
  .footer-nav {
    justify-content: flex-start;
  }
}

@media (max-width: 768px) {
  .menu-toggle {
    display: inline-flex;
  }
  .site-nav {
    display: none;
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    background-color: rgba(9, 13, 26, 0.98);
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    padding: 18px 20px;
    gap: 8px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.7);
  }
  .site-nav.open {
    display: flex;
  }
  .nav-actions {
    display: none;
  }
  .hero-title {
    font-size: 2rem;
  }
  .features-grid, .ai-grid {
    grid-template-columns: 1fr;
  }
  .mobile-sticky-bar {
    display: block;
  }
  body {
    padding-bottom: 64px;
  }
}