/* ==========================================================================
   宝云机场首页 - 流媒体极乐流 (Neon Pop / Entertainment Unlock)
   设计语言：类似海外流媒体大厂暗色放映厅质感，搭配高饱和度红紫热感渐变
   ========================================================================== */

:root {
  /* 官方指定色板 */
  --bg-primary: #0B0914;        /* 放映厅暗紫黑 */
  --bg-surface: #120E24;        /* 沉浸式放映台底色 */
  --bg-card: rgba(22, 17, 44, 0.7); /* 悬浮磨砂质感卡片 */
  --bg-card-hover: rgba(32, 24, 62, 0.85);
  
  --accent-red: #E50914;        /* 流媒体标准深红 */
  --grad-start: #FF007A;        /* 高光霓虹桃红 */
  --grad-end: #7928CA;          /* 霓虹极光紫 */
  --cta-btn: #FF0055;           /* 强冲击转化红 */
  --cta-hover: #ff1a6b;
  
  --text-white: #FFFFFF;        /* 纯白 */
  --text-muted: #A1A1AA;        /* 柔和灰 */
  --text-light: #E4E4E7;        /* 高亮文字 */
  
  --border-glass: rgba(255, 0, 122, 0.18);
  --border-glass-hover: rgba(255, 0, 122, 0.45);
  
  /* 霓虹发光光晕 */
  --shadow-neon-glow: 0 0 25px rgba(255, 0, 85, 0.45);
  --shadow-neon-lg: 0 10px 40px -10px rgba(255, 0, 122, 0.5);
  --shadow-card: 0 12px 30px rgba(0, 0, 0, 0.5);
  
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  scroll-behavior: smooth;
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

body {
  position: relative;
  min-height: 100vh;
  overflow-x: hidden;
  background-color: var(--bg-primary);
}

/* 背景 Canvas 与遮罩层 */
#bg-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
  opacity: 0.85;
}

.ambient-grid {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: 
    radial-gradient(circle at 50% 0%, rgba(229, 9, 20, 0.18) 0%, transparent 60%),
    radial-gradient(circle at 85% 35%, rgba(121, 40, 202, 0.22) 0%, transparent 50%),
    radial-gradient(circle at 15% 75%, rgba(255, 0, 122, 0.15) 0%, transparent 55%),
    linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 100% 100%, 100% 100%, 100% 100%, 48px 48px, 48px 48px;
  z-index: 1;
  pointer-events: none;
}

.content-wrapper {
  position: relative;
  z-index: 2;
}

/* 容器限制 */
.container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
}

/* 排版与文字渐变 */
.text-gradient {
  background: linear-gradient(135deg, #FFFFFF 0%, #FFB4D6 30%, #FF007A 70%, #7928CA 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.text-red {
  color: var(--accent-red);
}

.text-neon {
  background: linear-gradient(90deg, #FF007A, #FF0055);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* 按钮规范 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 28px;
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: var(--transition);
  border: 1px solid transparent;
  white-space: nowrap;
}

.btn-cta {
  background: var(--cta-btn);
  color: #fff;
  box-shadow: 0 0 25px rgba(255, 0, 85, 0.55), inset 0 1px 0 rgba(255, 255, 255, 0.3);
  position: relative;
  overflow: hidden;
}

.btn-cta::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
  transition: 0.6s;
}

.btn-cta:hover {
  background: var(--cta-hover);
  box-shadow: 0 0 35px rgba(255, 0, 85, 0.8), 0 0 10px rgba(255, 255, 255, 0.4);
  transform: translateY(-2px) scale(1.02);
}

.btn-cta:hover::after {
  left: 100%;
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-white);
  border: 1px solid rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 0, 122, 0.5);
  box-shadow: 0 0 20px rgba(121, 40, 202, 0.35);
  transform: translateY(-2px);
}

.btn-outline-neon {
  background: transparent;
  color: #FF007A;
  border: 1px solid #FF007A;
  box-shadow: inset 0 0 12px rgba(255, 0, 122, 0.2);
}

.btn-outline-neon:hover {
  background: #FF007A;
  color: #fff;
  box-shadow: 0 0 25px rgba(255, 0, 122, 0.6);
  transform: translateY(-2px);
}

.btn-sm {
  padding: 8px 18px;
  font-size: 0.875rem;
}

.btn-lg {
  padding: 16px 36px;
  font-size: 1.125rem;
}

/* ==========================================================================
   顶部导航栏 (Navbar)
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  transition: var(--transition);
  background: rgba(11, 9, 20, 0.7);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.site-header.scrolled {
  background: rgba(11, 9, 20, 0.92);
  border-bottom: 1px solid rgba(255, 0, 122, 0.2);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.7);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

.logo-wrap {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.logo-badge {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--accent-red), var(--grad-start));
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 20px rgba(229, 9, 20, 0.6);
}

.logo-badge svg {
  width: 24px;
  height: 24px;
  fill: #fff;
}

.logo-text-wrap {
  display: flex;
  flex-direction: column;
}

.logo-title {
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  color: var(--text-white);
  line-height: 1.2;
}

.logo-subtitle {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--text-muted);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.nav-link {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.938rem;
  font-weight: 500;
  transition: var(--transition);
  position: relative;
  padding: 6px 0;
}

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

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, #FF0055, #7928CA);
  transition: width 0.3s ease;
  border-radius: 2px;
}

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

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

.mobile-toggle {
  display: none;
  background: transparent;
  border: none;
  color: #fff;
  cursor: pointer;
  padding: 8px;
}

.mobile-toggle svg {
  width: 28px;
  height: 28px;
}

/* ==========================================================================
   板块 1：Hero 广告语与流媒体极乐特色
   ========================================================================== */
.hero-section {
  padding: 80px 0 60px;
  position: relative;
  overflow: hidden;
}

.hero-tag-wrap {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: var(--radius-full);
  background: rgba(255, 0, 122, 0.12);
  border: 1px solid rgba(255, 0, 122, 0.35);
  font-size: 0.813rem;
  font-weight: 600;
  color: #FF70B8;
  margin-bottom: 24px;
  box-shadow: 0 0 20px rgba(255, 0, 122, 0.2);
}

.pulse-dot {
  width: 8px;
  height: 8px;
  background: #00FF88;
  border-radius: 50%;
  box-shadow: 0 0 10px #00FF88;
  animation: pulse 1.6s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.9); opacity: 0.8; }
  50% { transform: scale(1.3); opacity: 1; }
  100% { transform: scale(0.9); opacity: 0.8; }
}

.hero-title {
  font-size: clamp(2.5rem, 5.5vw, 4.2rem);
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -1.5px;
  margin-bottom: 22px;
  max-width: 980px;
}

.hero-desc {
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  color: var(--text-muted);
  max-width: 800px;
  margin-bottom: 38px;
  line-height: 1.7;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
  margin-bottom: 50px;
}

.hero-trust-badge {
  display: flex;
  align-items: center;
  gap: 8px;
  color: #A1A1AA;
  font-size: 0.875rem;
}

/* 流媒体大厂霓虹徽章展台 */
.streaming-brands-bar {
  background: rgba(18, 14, 36, 0.6);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-lg);
  padding: 24px 32px;
  margin-top: 20px;
  box-shadow: var(--shadow-card);
}

.brands-bar-title {
  font-size: 0.813rem;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--text-muted);
  margin-bottom: 16px;
  text-align: center;
}

.brands-grid {
  display: flex;
  align-items: center;
  justify-content: space-around;
  flex-wrap: wrap;
  gap: 20px;
}

.brand-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 16px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 10px;
  transition: var(--transition);
}

.brand-item:hover {
  background: rgba(255, 0, 122, 0.1);
  border-color: rgba(255, 0, 122, 0.4);
  transform: translateY(-2px);
  box-shadow: 0 0 15px rgba(255, 0, 122, 0.25);
}

.brand-item svg {
  width: 22px;
  height: 22px;
}

.brand-item span {
  font-weight: 600;
  font-size: 0.938rem;
  color: #fff;
}

/* 核心指标统计 */
.hero-stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 40px;
}

.stat-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  padding: 22px;
  text-align: center;
  transition: var(--transition);
}

.stat-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-glass-hover);
  transform: translateY(-3px);
  box-shadow: var(--shadow-neon-glow);
}

.stat-num {
  font-size: 2.2rem;
  font-weight: 800;
  background: linear-gradient(135deg, #fff 0%, #FF70B8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1.2;
}

.stat-label {
  font-size: 0.813rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* ==========================================================================
   板块通用样式
   ========================================================================== */
.section {
  padding: 90px 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 56px;
}

.section-tag {
  display: inline-block;
  font-size: 0.813rem;
  text-transform: uppercase;
  letter-spacing: 2px;
  font-weight: 700;
  color: #FF007A;
  margin-bottom: 12px;
  background: rgba(255, 0, 122, 0.1);
  padding: 4px 14px;
  border-radius: var(--radius-full);
  border: 1px solid rgba(255, 0, 122, 0.25);
}

.section-title {
  font-size: clamp(2rem, 3.5vw, 2.8rem);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 16px;
  letter-spacing: -0.8px;
}

.section-desc {
  font-size: 1.063rem;
  color: var(--text-muted);
  line-height: 1.65;
}

/* ==========================================================================
   板块 3：节点延迟和状态监控板块 (Live Latency & Status)
   ========================================================================== */
.node-status-box {
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 30px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.6);
}

.status-top-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 20px;
  margin-bottom: 24px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  flex-wrap: wrap;
  gap: 16px;
}

.status-indicator {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  font-size: 0.938rem;
}

.status-dot-green {
  width: 10px;
  height: 10px;
  background: #10B981;
  border-radius: 50%;
  box-shadow: 0 0 12px #10B981;
  animation: pulse 2s infinite;
}

.node-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
  gap: 18px;
}

.node-card {
  background: rgba(18, 14, 36, 0.85);
  border: 1px solid rgba(255, 255, 255, 0.07);
  border-radius: var(--radius-md);
  padding: 18px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.node-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 100%;
  background: #10B981;
  opacity: 0.6;
  transition: var(--transition);
}

.node-card:hover {
  border-color: rgba(255, 0, 122, 0.4);
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5), 0 0 15px rgba(255, 0, 122, 0.15);
}

.node-card:hover::before {
  background: #FF007A;
  box-shadow: 0 0 10px #FF007A;
  opacity: 1;
}

.node-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}

.node-flag-title {
  display: flex;
  align-items: center;
  gap: 8px;
}

.node-flag {
  font-size: 1.3rem;
}

.node-name {
  font-weight: 700;
  font-size: 0.938rem;
  color: #fff;
}

.node-type-tag {
  font-size: 0.688rem;
  background: rgba(229, 9, 20, 0.2);
  color: #FF5A65;
  padding: 2px 8px;
  border-radius: 4px;
  border: 1px solid rgba(229, 9, 20, 0.35);
  font-weight: 600;
}

.node-meta-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  font-size: 0.813rem;
}

.node-latency {
  display: flex;
  align-items: baseline;
  gap: 4px;
  font-weight: 700;
  color: #10B981;
}

.node-latency.moderate {
  color: #F59E0B;
}

.node-speed {
  color: var(--text-muted);
}

.node-unlock-badges {
  display: flex;
  gap: 5px;
  margin-top: 10px;
}

.unlock-pill {
  font-size: 0.688rem;
  padding: 2px 6px;
  border-radius: 3px;
  background: rgba(255, 255, 255, 0.05);
  color: #D4D4D8;
}

/* ==========================================================================
   板块 4：套餐价格板块 (Pricing Plans)
   ========================================================================== */
.pricing-tabs {
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(18, 14, 36, 0.8);
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 5px;
  border-radius: var(--radius-full);
  max-width: 440px;
  margin: 0 auto 48px;
}

.pricing-tab {
  flex: 1;
  padding: 10px 18px;
  text-align: center;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  cursor: pointer;
  color: var(--text-muted);
  transition: var(--transition);
  border: none;
  background: transparent;
}

.pricing-tab.active {
  background: linear-gradient(135deg, #FF0055, #7928CA);
  color: #fff;
  box-shadow: 0 4px 15px rgba(255, 0, 85, 0.4);
}

.pricing-tab .discount-tag {
  font-size: 0.688rem;
  background: #FF0055;
  color: #fff;
  padding: 2px 6px;
  border-radius: 999px;
  margin-left: 4px;
}

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

.pricing-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 38px 30px;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
  position: relative;
}

.pricing-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-neon-glow);
  border-color: rgba(255, 0, 122, 0.6);
}

.pricing-card.featured {
  background: linear-gradient(180deg, rgba(38, 22, 68, 0.85) 0%, rgba(20, 14, 40, 0.95) 100%);
  border: 2px solid #FF007A;
  box-shadow: 0 0 35px rgba(255, 0, 122, 0.35);
  transform: scale(1.03);
}

.pricing-card.featured:hover {
  transform: scale(1.04) translateY(-6px);
  box-shadow: 0 0 45px rgba(255, 0, 122, 0.55);
}

.featured-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(90deg, #FF0055, #FF007A);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  padding: 4px 18px;
  border-radius: var(--radius-full);
  box-shadow: 0 0 15px rgba(255, 0, 85, 0.7);
}

.plan-header {
  margin-bottom: 24px;
}

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

.plan-desc {
  font-size: 0.875rem;
  color: var(--text-muted);
}

.plan-price-wrap {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 26px;
  padding-bottom: 24px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.currency {
  font-size: 1.5rem;
  font-weight: 700;
  color: #FF007A;
}

.price-amount {
  font-size: 3rem;
  font-weight: 900;
  color: #fff;
  line-height: 1;
}

.billing-cycle {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-left: 4px;
}

.plan-features-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 34px;
  flex-grow: 1;
}

.plan-feature-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 0.938rem;
  color: var(--text-light);
}

.plan-feature-item svg {
  width: 18px;
  height: 18px;
  fill: #FF007A;
  flex-shrink: 0;
  margin-top: 3px;
}

.plan-feature-item.highlight {
  color: #fff;
  font-weight: 600;
}

.plan-cta-btn {
  width: 100%;
}

/* ==========================================================================
   板块 4 续：核心优势板块 (Core Advantages)
   ========================================================================== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-box {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 32px 26px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.feature-box::after {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 80px;
  height: 80px;
  background: radial-gradient(circle at top right, rgba(255, 0, 122, 0.2), transparent 70%);
  pointer-events: none;
}

.feature-box:hover {
  background: var(--bg-card-hover);
  border-color: rgba(255, 0, 122, 0.45);
  transform: translateY(-6px);
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.5), 0 0 20px rgba(255, 0, 122, 0.25);
}

.feature-icon-wrap {
  width: 58px;
  height: 58px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, rgba(229, 9, 20, 0.2), rgba(121, 40, 202, 0.2));
  border: 1px solid rgba(255, 0, 122, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 22px;
  box-shadow: 0 0 20px rgba(255, 0, 122, 0.2);
}

.feature-icon-wrap svg {
  width: 28px;
  height: 28px;
  fill: #FF007A;
}

.feature-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: #fff;
}

.feature-desc {
  font-size: 0.938rem;
  color: var(--text-muted);
  line-height: 1.65;
}

/* ==========================================================================
   板块 5：常见问题 (FAQ) 与 知识库教程板块 (Knowledge Base)
   ========================================================================== */
/* FAQ */
.faq-wrap {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--bg-card);
  backdrop-filter: blur(14px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition);
}

.faq-item:hover {
  border-color: rgba(255, 0, 122, 0.4);
}

.faq-item.active {
  border-color: #FF007A;
  box-shadow: 0 0 20px rgba(255, 0, 122, 0.2);
}

.faq-question {
  width: 100%;
  padding: 22px 26px;
  background: transparent;
  border: none;
  color: #fff;
  font-size: 1.063rem;
  font-weight: 700;
  text-align: left;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  transition: var(--transition);
}

.faq-question:hover {
  color: #FF70B8;
}

.faq-icon {
  width: 24px;
  height: 24px;
  transition: transform 0.3s ease;
  fill: #A1A1AA;
  flex-shrink: 0;
}

.faq-item.active .faq-icon {
  transform: rotate(180deg);
  fill: #FF007A;
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
  padding: 0 26px;
  color: var(--text-muted);
  font-size: 0.938rem;
  line-height: 1.7;
}

.faq-item.active .faq-answer {
  max-height: 500px;
  padding-bottom: 24px;
}

.faq-answer p {
  margin-bottom: 12px;
}

.faq-answer p:last-child {
  margin-bottom: 0;
}

/* 知识库板块 (Wiki & Tutorials) */
.wiki-section {
  padding-top: 60px;
}

.wiki-filter-bar {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 38px;
}

.wiki-filter-btn {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text-muted);
  padding: 8px 18px;
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.wiki-filter-btn:hover, .wiki-filter-btn.active {
  background: #FF007A;
  color: #fff;
  border-color: #FF007A;
  box-shadow: 0 0 15px rgba(255, 0, 122, 0.5);
}

.wiki-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
  gap: 26px;
}

.wiki-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 26px;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
  text-decoration: none;
  color: inherit;
  position: relative;
  overflow: hidden;
}

.wiki-card:hover {
  transform: translateY(-6px);
  border-color: rgba(255, 0, 122, 0.55);
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.5), 0 0 25px rgba(255, 0, 122, 0.3);
}

.wiki-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 14px;
}

.wiki-category-tag {
  font-size: 0.75rem;
  font-weight: 700;
  color: #FF70B8;
  background: rgba(255, 0, 122, 0.15);
  padding: 3px 10px;
  border-radius: 4px;
  border: 1px solid rgba(255, 0, 122, 0.3);
}

.wiki-read-time {
  font-size: 0.75rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 4px;
}

.wiki-title {
  font-size: 1.188rem;
  font-weight: 700;
  color: #fff;
  line-height: 1.45;
  margin-bottom: 12px;
  transition: var(--transition);
}

.wiki-card:hover .wiki-title {
  color: #FF70B8;
}

.wiki-snippet {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 20px;
  flex-grow: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.wiki-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 14px;
  font-size: 0.813rem;
}

.wiki-keywords {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.keyword-badge {
  color: #A1A1AA;
  background: rgba(255, 255, 255, 0.04);
  padding: 2px 8px;
  border-radius: 3px;
  font-size: 0.75rem;
}

.wiki-link-arrow {
  color: #FF007A;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 4px;
}

/* ==========================================================================
   板块 6：用户评价板块 (Testimonials)
   ========================================================================== */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.testimonial-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 30px 24px;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
}

.testimonial-card:hover {
  transform: translateY(-5px);
  border-color: rgba(255, 0, 122, 0.4);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.4), 0 0 18px rgba(255, 0, 122, 0.2);
}

.stars-row {
  display: flex;
  gap: 4px;
  margin-bottom: 16px;
  color: #FFB800;
}

.testimonial-content {
  font-size: 0.938rem;
  color: #E4E4E7;
  line-height: 1.65;
  margin-bottom: 22px;
  flex-grow: 1;
}

.user-profile {
  display: flex;
  align-items: center;
  gap: 12px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 16px;
}

.user-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, #FF007A, #7928CA);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1rem;
  color: #fff;
  border: 2px solid rgba(255, 255, 255, 0.2);
}

.user-info-name {
  font-weight: 700;
  font-size: 0.938rem;
  color: #fff;
}

.user-info-role {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.user-badge-tag {
  margin-left: auto;
  font-size: 0.688rem;
  background: rgba(16, 185, 129, 0.15);
  color: #10B981;
  padding: 2px 8px;
  border-radius: 999px;
  border: 1px solid rgba(16, 185, 129, 0.3);
}

/* ==========================================================================
   页尾 CTA Banner & Footer
   ========================================================================== */
.footer-cta-banner {
  background: linear-gradient(135deg, rgba(229, 9, 20, 0.85) 0%, rgba(121, 40, 202, 0.85) 100%);
  border-radius: var(--radius-lg);
  padding: 60px 40px;
  text-align: center;
  margin-bottom: 70px;
  box-shadow: 0 20px 60px rgba(229, 9, 20, 0.4);
  border: 1px solid rgba(255, 255, 255, 0.2);
  position: relative;
  overflow: hidden;
}

.footer-cta-title {
  font-size: clamp(2rem, 3.5vw, 2.8rem);
  font-weight: 900;
  color: #fff;
  margin-bottom: 16px;
}

.footer-cta-desc {
  font-size: 1.125rem;
  color: rgba(255, 255, 255, 0.9);
  max-width: 650px;
  margin: 0 auto 32px;
}

.site-footer {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 50px 0 35px;
  background: rgba(8, 6, 16, 0.95);
  color: var(--text-muted);
  font-size: 0.875rem;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
}

.footer-links {
  display: flex;
  gap: 22px;
  list-style: none;
}

.footer-link {
  color: var(--text-muted);
  text-decoration: none;
  transition: var(--transition);
}

.footer-link:hover {
  color: #FF007A;
}

/* 移动端菜单抽屉 */
.mobile-nav-drawer {
  display: none;
  position: fixed;
  top: 76px;
  left: 0;
  width: 100%;
  background: rgba(11, 9, 20, 0.98);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 0, 122, 0.3);
  padding: 24px;
  z-index: 99;
}

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

.mobile-nav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.mobile-nav-item a {
  color: #fff;
  text-decoration: none;
  font-size: 1.1rem;
  font-weight: 600;
  display: block;
  padding: 8px 0;
}

/* ==========================================================================
   响应式断点适配
   ========================================================================== */
@media (max-width: 1024px) {
  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 520px;
    margin: 0 auto;
  }
  .pricing-card.featured {
    transform: none;
  }
  .pricing-card.featured:hover {
    transform: translateY(-6px);
  }
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .testimonials-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .hero-stats-row {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-links, .nav-actions .btn-secondary {
    display: none;
  }
  .mobile-toggle {
    display: block;
  }
  .features-grid {
    grid-template-columns: 1fr;
  }
  .testimonials-grid {
    grid-template-columns: 1fr;
  }
  .wiki-grid {
    grid-template-columns: 1fr;
  }
  .hero-stats-row {
    grid-template-columns: 1fr 1fr;
  }
  .hero-cta-group {
    flex-direction: column;
    align-items: stretch;
  }
  .hero-cta-group .btn {
    width: 100%;
  }
}