/* ==========================================================================
   青云梯 SEO 官网 · A 未来科技旗舰 V2.0 核心设计系统与样式表
   Design Tokens: 深海蓝 #0B1227 | 电光青 #00C6FF | 霓虹紫 #654CFF
   ========================================================================== */

:root {
  /* 品牌核心配色体系 */
  --bg-deep: #0B1227;              /* 深海蓝主背景 */
  --bg-card: rgba(17, 26, 56, 0.85); /* 科技卡片磨砂底色 */
  --bg-card-hover: rgba(22, 34, 72, 0.95);
  --bg-surface: #101B3B;           /* 实体面板底色 */
  --bg-input: #0E1630;
  
  --cyan-primary: #00C6FF;         /* 电光青主强调色 */
  --purple-neon: #654CFF;          /* 霓虹紫渐变与次强调色 */
  --cyan-glow: rgba(0, 198, 255, 0.35);
  --purple-glow: rgba(101, 76, 255, 0.35);

  --gradient-tech: linear-gradient(135deg, #00C6FF 0%, #654CFF 100%);
  --gradient-tech-rev: linear-gradient(135deg, #654CFF 0%, #00C6FF 100%);
  --gradient-glow: radial-gradient(circle, rgba(0, 198, 255, 0.2) 0%, rgba(101, 76, 255, 0.08) 50%, transparent 70%);

  /* 文字颜色 */
  --text-primary: #FFFFFF;
  --text-secondary: #CBD5E1;
  --text-muted: #94A3B8;
  --text-dim: #64748B;

  /* 边框与微光 */
  --border-subtle: rgba(255, 255, 255, 0.1);
  --border-tech: rgba(0, 198, 255, 0.3);
  --border-purple: rgba(101, 76, 255, 0.35);

  /* 字体排版 */
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  --font-mono: SFMono-Regular, Consolas, 'Liberation Mono', Menlo, monospace;

  /* 尺寸与布局 */
  --container-max: 1200px;
  --container-narrow: 880px;
  --header-height: 76px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  /* 动效 */
  --transition-fast: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-normal: 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

/* 全局基础重置 */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 24px);
  background-color: var(--bg-deep);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--bg-deep);
  background-image: 
    radial-gradient(at 0% 0%, rgba(0, 198, 255, 0.1) 0px, transparent 50%),
    radial-gradient(at 100% 100%, rgba(101, 76, 255, 0.12) 0px, transparent 50%);
  background-attachment: fixed;
  overflow-x: hidden;
}

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

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

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

/* 容器规范 */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

.container-narrow {
  max-width: var(--container-narrow);
}

/* 按钮规范 (严控触摸区域 >= 44x44px) */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 46px;
  padding: 10px 24px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  text-align: center;
  cursor: pointer;
  transition: var(--transition-normal);
  white-space: nowrap;
}

.btn-primary {
  background: var(--gradient-tech);
  color: #050917;
  font-weight: 700;
  box-shadow: 0 4px 18px var(--cyan-glow);
  border: 1px solid rgba(255, 255, 255, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(0, 198, 255, 0.5);
  filter: brightness(1.08);
}

.btn-secondary {
  background: rgba(17, 26, 56, 0.85);
  color: var(--cyan-primary);
  border: 1px solid var(--border-tech);
  backdrop-filter: blur(8px);
}

.btn-secondary:hover {
  background: rgba(0, 198, 255, 0.12);
  border-color: var(--cyan-primary);
  color: #FFFFFF;
  transform: translateY(-2px);
}

.btn-purple {
  background: rgba(101, 76, 255, 0.15);
  color: #D8D2FF;
  border: 1px solid var(--border-purple);
}

.btn-purple:hover {
  background: var(--purple-neon);
  color: #FFFFFF;
  box-shadow: 0 4px 20px var(--purple-glow);
  transform: translateY(-2px);
}

/* 头部品牌导航 */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  background: rgba(11, 18, 39, 0.88);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
}

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

.brand-link {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-logo-img {
  height: 44px;
  width: auto;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-item {
  font-size: 0.95rem;
  color: var(--text-secondary);
  font-weight: 500;
  position: relative;
  padding: 8px 4px;
}

.nav-item:hover, .nav-item.active {
  color: var(--cyan-primary);
}

.nav-item::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background: var(--gradient-tech);
  transition: width var(--transition-fast);
}

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

.header-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.mobile-menu-btn {
  display: none;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  color: var(--text-primary);
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.05);
}

/* 移动端菜单下拉抽屉 */
.mobile-nav-drawer {
  display: none;
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  background: rgba(11, 18, 39, 0.98);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-tech);
  padding: 24px;
  flex-direction: column;
  gap: 16px;
  z-index: 99;
}

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

.mobile-nav-link {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-secondary);
  padding: 12px 16px;
  border-radius: var(--radius-sm);
}

.mobile-nav-link:hover {
  background: rgba(0, 198, 255, 0.1);
  color: var(--cyan-primary);
}

/* ==========================================================================
   Hero 主视觉区域 (严格锁定文案与高科技视觉素材)
   ========================================================================== */
.hero-section {
  position: relative;
  padding: 64px 0 96px;
  overflow: hidden;
}

.hero-background-art {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  pointer-events: none;
  z-index: 0;
}

.art-earth {
  position: absolute;
  bottom: -120px;
  left: 50%;
  transform: translateX(-50%);
  width: 1200px;
  max-width: 140vw;
  opacity: 0.75;
}

.art-orbit-trails {
  position: absolute;
  top: 10px;
  left: 50%;
  transform: translateX(-50%);
  width: 1100px;
  max-width: 130vw;
  opacity: 0.65;
}

.art-clouds {
  position: absolute;
  bottom: -40px;
  left: 50%;
  transform: translateX(-50%);
  width: 1200px;
  max-width: 140vw;
  opacity: 0.55;
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 860px;
  margin: 0 auto;
}

.hero-badge-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: var(--radius-full);
  background: rgba(17, 26, 56, 0.8);
  border: 1px solid var(--border-tech);
  color: var(--cyan-primary);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 24px;
  box-shadow: 0 2px 12px var(--cyan-glow);
}

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

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

/* 锁定 H1 文案 */
.hero-title {
  font-size: clamp(2.2rem, 4.5vw, 3.4rem);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.5px;
  margin-bottom: 18px;
  color: #FFFFFF;
}

.hero-title .tech-gradient-text {
  background: var(--gradient-tech);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

/* 锁定副标题 */
.hero-subtitle {
  font-size: clamp(1.2rem, 2.2vw, 1.5rem);
  font-weight: 600;
  color: var(--cyan-primary);
  margin-bottom: 20px;
}

/* 锁定说明文字 */
.hero-description {
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--text-secondary);
  margin-bottom: 36px;
  max-width: 780px;
  margin-left: auto;
  margin-right: auto;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

/* Hero 特征指示胶囊 */
.hero-metrics-bar {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-tech);
  border-radius: var(--radius-lg);
  padding: 20px 28px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

.metric-item {
  display: flex;
  align-items: center;
  gap: 14px;
  text-align: left;
}

.metric-icon-box {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: rgba(0, 198, 255, 0.1);
  border: 1px solid var(--border-tech);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--cyan-primary);
  flex-shrink: 0;
}

.metric-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: #FFFFFF;
}

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

/* ==========================================================================
   模块通用标题与卡片规范
   ========================================================================== */
.section-block {
  padding: 80px 0;
  position: relative;
}

.section-block-alt {
  background: rgba(14, 22, 48, 0.45);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 52px;
}

.section-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--cyan-primary);
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 10px;
}

.section-title {
  font-size: clamp(1.8rem, 3.2vw, 2.4rem);
  font-weight: 800;
  color: #FFFFFF;
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}

.section-desc {
  font-size: 1.02rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* 核心优势网格 */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.feature-card {
  background: var(--bg-card);
  backdrop-filter: blur(14px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  transition: var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-tech);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.feature-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-tech);
  box-shadow: 0 12px 30px rgba(0, 198, 255, 0.15);
}

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

.feature-icon-wrapper {
  width: 54px;
  height: 54px;
  border-radius: var(--radius-md);
  background: rgba(0, 198, 255, 0.12);
  border: 1px solid var(--border-tech);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--cyan-primary);
  margin-bottom: 20px;
}

.feature-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: #FFFFFF;
  margin-bottom: 12px;
}

.feature-text {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* 使用场景卡片 */
.scenarios-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.scenario-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  transition: var(--transition-normal);
}

.scenario-card:hover {
  border-color: var(--border-purple);
  transform: translateY(-4px);
  box-shadow: 0 8px 24px var(--purple-glow);
}

.scenario-badge {
  display: inline-block;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  background: rgba(101, 76, 255, 0.15);
  color: #B4A6FF;
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 14px;
}

.scenario-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: #FFFFFF;
  margin-bottom: 10px;
}

.scenario-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* ==========================================================================
   套餐价格区域 (真实套餐参数·科技卡片排版)
   ========================================================================== */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: var(--transition-normal);
}

.pricing-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-tech);
  box-shadow: 0 16px 36px rgba(0, 198, 255, 0.2);
}

/* 热门推荐卡片高光 */
.pricing-card.featured {
  border-color: var(--cyan-primary);
  background: linear-gradient(180deg, rgba(16, 28, 64, 0.95) 0%, rgba(11, 18, 39, 0.95) 100%);
  box-shadow: 0 8px 32px var(--cyan-glow);
  transform: scale(1.02);
}

.pricing-card.featured:hover {
  transform: scale(1.02) translateY(-6px);
  box-shadow: 0 18px 42px rgba(0, 198, 255, 0.35);
}

.popular-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--gradient-tech);
  color: #050917;
  font-size: 0.8rem;
  font-weight: 800;
  padding: 4px 14px;
  border-radius: var(--radius-full);
  letter-spacing: 0.5px;
  box-shadow: 0 4px 12px var(--cyan-glow);
}

.plan-header {
  margin-bottom: 24px;
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 20px;
}

.plan-name {
  font-size: 1.35rem;
  font-weight: 800;
  color: #FFFFFF;
  margin-bottom: 8px;
}

.plan-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  min-height: 42px;
}

.plan-price-box {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-top: 14px;
}

.plan-currency {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--cyan-primary);
}

.plan-amount {
  font-size: 2.6rem;
  font-weight: 900;
  color: #FFFFFF;
  line-height: 1;
}

.plan-cycle {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-left: 4px;
}

.plan-specs {
  list-style: none;
  margin-bottom: 32px;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.plan-spec-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.92rem;
  color: var(--text-secondary);
}

.spec-icon {
  width: 18px;
  height: 18px;
  color: var(--cyan-primary);
  flex-shrink: 0;
  margin-top: 3px;
}

/* ==========================================================================
   三条购买前说明 (醒目科技提示卡片)
   ========================================================================== */
.notices-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}

.notice-card {
  background: rgba(16, 25, 54, 0.7);
  border: 1px solid rgba(101, 76, 255, 0.25);
  border-radius: var(--radius-lg);
  padding: 28px;
  display: flex;
  gap: 18px;
  transition: var(--transition-normal);
}

.notice-card:hover {
  border-color: var(--purple-neon);
  box-shadow: 0 8px 24px var(--purple-glow);
}

.notice-num {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 900;
  color: var(--purple-neon);
  line-height: 1;
  padding-top: 4px;
}

.notice-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: #FFFFFF;
  margin-bottom: 8px;
}

.notice-text {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* ==========================================================================
   设备平台区域
   ========================================================================== */
.platforms-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 20px;
}

.platform-pill {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 20px 16px;
  text-align: center;
  transition: var(--transition-fast);
}

.platform-pill:hover {
  border-color: var(--cyan-primary);
  transform: translateY(-4px);
  background: rgba(0, 198, 255, 0.08);
}

.platform-icon-circle {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.05);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 12px;
  color: var(--cyan-primary);
}

.platform-name {
  font-size: 0.95rem;
  font-weight: 700;
  color: #FFFFFF;
}

.platform-sub {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* ==========================================================================
   FAQ 模块 (原生 details 折叠)
   ========================================================================== */
.faq-list {
  max-width: 840px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

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

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

.faq-item[open] {
  border-color: var(--border-tech);
  box-shadow: 0 4px 20px rgba(0, 198, 255, 0.12);
}

.faq-question {
  padding: 20px 24px;
  font-size: 1.05rem;
  font-weight: 700;
  color: #FFFFFF;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  list-style: none;
  user-select: none;
}

.faq-question::-webkit-details-marker {
  display: none;
}

.faq-toggle-icon {
  width: 20px;
  height: 20px;
  color: var(--cyan-primary);
  transition: transform var(--transition-normal);
}

.faq-item[open] .faq-toggle-icon {
  transform: rotate(180deg);
}

.faq-answer {
  padding: 0 24px 22px;
  font-size: 0.94rem;
  line-height: 1.75;
  color: var(--text-secondary);
}

/* ==========================================================================
   最终 CTA 区域
   ========================================================================== */
.cta-banner {
  background: linear-gradient(135deg, rgba(16, 28, 64, 0.9) 0%, rgba(26, 20, 68, 0.9) 100%);
  border: 1px solid var(--border-tech);
  border-radius: var(--radius-lg);
  padding: 56px 40px;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.5);
}

.cta-banner::before {
  content: '';
  position: absolute;
  top: -50%;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 300px;
  background: var(--gradient-glow);
  pointer-events: none;
}

.cta-title {
  font-size: clamp(1.8rem, 3.2vw, 2.5rem);
  font-weight: 800;
  color: #FFFFFF;
  margin-bottom: 16px;
}

.cta-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 640px;
  margin: 0 auto 32px;
}

/* ==========================================================================
   规范页脚
   ========================================================================== */
.site-footer {
  background: #070D1E;
  border-top: 1px solid var(--border-subtle);
  padding: 64px 0 32px;
  margin-top: auto;
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: 40px;
  margin-bottom: 48px;
}

.footer-brand-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-top: 16px;
  max-width: 360px;
}

.footer-heading {
  font-size: 0.95rem;
  font-weight: 700;
  color: #FFFFFF;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 18px;
}

.footer-nav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-link {
  font-size: 0.88rem;
  color: var(--text-secondary);
  transition: var(--transition-fast);
}

.footer-link:hover {
  color: var(--cyan-primary);
  transform: translateX(3px);
}

.footer-bottom {
  border-top: 1px solid var(--border-subtle);
  padding-top: 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.82rem;
  color: var(--text-dim);
}

.footer-disclaimer {
  max-width: 720px;
  line-height: 1.6;
}

/* ==========================================================================
   用户评价区域 (User Reviews & Feedback)
   ========================================================================== */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(270px, 1fr));
  gap: 24px;
}

.review-card {
  background: var(--bg-card);
  backdrop-filter: blur(14px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 30px 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.review-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-tech);
  box-shadow: 0 12px 32px rgba(0, 198, 255, 0.16);
}

.review-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.review-role-badge {
  font-size: 0.8rem;
  font-weight: 700;
  padding: 3px 12px;
  border-radius: var(--radius-full);
  background: rgba(0, 198, 255, 0.12);
  border: 1px solid var(--border-tech);
  color: var(--cyan-primary);
}

.review-stars {
  color: #FFB020;
  font-size: 0.95rem;
  display: flex;
  gap: 3px;
}

.review-quote {
  font-size: 0.94rem;
  line-height: 1.75;
  color: var(--text-secondary);
  margin-bottom: 22px;
  flex-grow: 1;
}

.review-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 16px;
  border-top: 1px solid var(--border-subtle);
  font-size: 0.85rem;
}

.review-user-name {
  font-weight: 700;
  color: #FFFFFF;
}

.review-plan-tag {
  color: var(--text-muted);
  font-size: 0.8rem;
}

/* ==========================================================================
   响应式断点控制
   ========================================================================== */
@media (max-width: 992px) {
  .nav-links {
    display: none;
  }

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

  .footer-top {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }

  .pricing-card.featured {
    transform: none;
  }
}

@media (max-width: 640px) {
  :root {
    --header-height: 68px;
  }

  .hero-section {
    padding: 40px 0 64px;
  }

  .hero-metrics-bar {
    grid-template-columns: 1fr;
  }

  .footer-top {
    grid-template-columns: 1fr;
  }

  .cta-banner {
    padding: 40px 20px;
  }

  .btn {
    width: 100%;
  }

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