/* ===================================================================
   【风格 01 · 盾心蓝】 放心云 (FANGXIN CLOUD)
   整体风格：金融级安心蓝
   主色：深海军蓝 #0A1F4D | 唯一强调色：晴空青 #4CC3FF | 正文：纯白/浅青白
   字体：中文标题超粗黑体 (900) | 数字：Space Grotesk
   卡片：细描边微玻璃质感，点缀盾牌与对勾元素，银行级安心质感
   =================================================================== */

:root {
  --bg-navy: #0A1F4D;
  --bg-navy-dark: #061536;
  --bg-card: rgba(13, 39, 96, 0.65);
  --bg-card-hover: rgba(18, 52, 128, 0.75);
  
  --cyan-primary: #4CC3FF;
  --cyan-light: #8AE0FF;
  --cyan-glow: rgba(76, 195, 255, 0.35);
  --border-cyan: rgba(76, 195, 255, 0.22);
  --border-cyan-bright: rgba(76, 195, 255, 0.65);
  
  --text-white: #FFFFFF;
  --text-secondary: #C4DCFA;
  --text-muted: #84A9D8;
  
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  
  --shadow-card: 0 10px 30px -5px rgba(2, 10, 28, 0.6), 0 0 1px 1px rgba(76, 195, 255, 0.15);
  --shadow-glow: 0 0 25px rgba(76, 195, 255, 0.4);
  --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --container-max: 1200px;
}

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

html {
  scroll-behavior: smooth;
  background-color: var(--bg-navy);
  color: var(--text-white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

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

#bg-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: -1;
  pointer-events: none;
}

a {
  color: inherit;
  text-decoration: none;
}

ul, ol {
  list-style: none;
}

img, svg {
  vertical-align: middle;
}

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

h1, h2, h3, h4, .font-heavy {
  font-family: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", -apple-system, sans-serif;
  font-weight: 900;
  letter-spacing: -0.01em;
}

.num-font, .price-num, .stat-value {
  font-family: "Space Grotesk", "DIN Alternate", "SF Pro Display", -apple-system, sans-serif;
  font-weight: 800;
  font-variant-numeric: tabular-nums;
}

/* 头部导航栏 */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  background: rgba(10, 31, 77, 0.88);
  border-bottom: 1px solid var(--border-cyan);
  padding: 16px 0;
  transition: var(--transition);
}

.nav-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.25rem;
  font-weight: 900;
  color: var(--text-white);
  letter-spacing: -0.01em;
}

.logo-icon {
  width: 38px;
  height: 38px;
  background: rgba(76, 195, 255, 0.15);
  border: 1.5px solid var(--cyan-primary);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--cyan-primary);
  box-shadow: 0 0 15px rgba(76, 195, 255, 0.3);
}

.logo-text span {
  color: var(--cyan-primary);
  font-size: 0.95rem;
  font-weight: 700;
  margin-left: 4px;
}

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

.nav-link {
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 600;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-link:hover {
  color: var(--cyan-primary);
  text-shadow: 0 0 8px rgba(76, 195, 255, 0.6);
}

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

/* 按钮通用 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 0.95rem;
  font-weight: 700;
  padding: 10px 22px;
  border-radius: var(--radius-full);
  transition: var(--transition);
  cursor: pointer;
  border: 1px solid transparent;
  white-space: nowrap;
}

.btn-sm {
  padding: 8px 18px;
  font-size: 0.88rem;
}

.btn-lg {
  padding: 15px 36px;
  font-size: 1.08rem;
}

.btn-primary {
  background: var(--cyan-primary);
  color: #061838;
  font-weight: 900;
  box-shadow: 0 4px 18px rgba(76, 195, 255, 0.45);
  border: 1px solid #8AE0FF;
}

.btn-primary:hover {
  background: #73D2FF;
  box-shadow: 0 6px 25px rgba(76, 195, 255, 0.7);
  transform: translateY(-2px);
}

.btn-secondary {
  background: rgba(76, 195, 255, 0.08);
  color: var(--text-white);
  border: 1px solid var(--border-cyan);
}

.btn-secondary:hover {
  background: rgba(76, 195, 255, 0.16);
  border-color: var(--cyan-primary);
  color: var(--cyan-primary);
  transform: translateY(-2px);
}

/* 主视觉区 */
.hero-section {
  padding: 70px 0 60px;
  position: relative;
}

.hero-layout {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  align-items: center;
  gap: 40px;
}

.hero-left {
  text-align: left;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(76, 195, 255, 0.12);
  border: 1px solid var(--border-cyan-bright);
  padding: 6px 18px;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  color: var(--cyan-primary);
  font-weight: 700;
  margin-bottom: 22px;
}

.hero-badge-pulse {
  width: 8px;
  height: 8px;
  background: var(--cyan-primary);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--cyan-primary);
}

.hero-title {
  font-size: 3.1rem;
  font-weight: 900;
  line-height: 1.22;
  color: var(--text-white);
  margin-bottom: 18px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.hero-title-top {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.brand-glow {
  color: var(--cyan-primary);
  text-shadow: 0 0 25px rgba(76, 195, 255, 0.6);
}

.title-shield-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  vertical-align: middle;
  position: relative;
}

.shield-pulse-check {
  transform-origin: 20px 20px;
  animation: checkPulseScale 1.6s ease-in-out infinite;
}

@keyframes checkPulseScale {
  0%, 100% {
    transform: scale(0.88);
    opacity: 0.85;
  }
  50% {
    transform: scale(1.28);
    opacity: 1;
    filter: drop-shadow(0 0 6px #4CC3FF);
  }
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 24px;
}

.hero-intro-box {
  background: var(--bg-card);
  border: 1px solid var(--border-cyan);
  border-radius: var(--radius-md);
  padding: 22px 26px;
  backdrop-filter: blur(14px);
  box-shadow: var(--shadow-card);
  margin-bottom: 30px;
}

.hero-intro-header {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  font-weight: 800;
  color: var(--cyan-primary);
  margin-bottom: 10px;
  letter-spacing: 0.05em;
}

.hero-intro-text {
  font-size: 0.96rem;
  color: var(--text-secondary);
  line-height: 1.75;
}

.hero-intro-text strong {
  color: var(--text-white);
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 36px;
  flex-wrap: wrap;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-cyan);
  border-radius: var(--radius-md);
  padding: 20px 16px;
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow-card);
}

.stat-item {
  text-align: center;
  position: relative;
}

.stat-item:not(:last-child)::after {
  content: "";
  position: absolute;
  right: 0;
  top: 15%;
  height: 70%;
  width: 1px;
  background: var(--border-cyan);
}

.stat-value {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--cyan-primary);
  display: block;
  margin-bottom: 4px;
  text-shadow: 0 0 12px rgba(76, 195, 255, 0.4);
}

.stat-label {
  font-size: 0.84rem;
  color: var(--text-secondary);
  font-weight: 600;
}

/* 右侧主视觉 */
.hero-right {
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.shield-guardian-container {
  width: 100%;
  max-width: 480px;
  aspect-ratio: 1 / 1;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.shield-svg {
  width: 100%;
  height: 100%;
  overflow: visible;
}

.halo-breath {
  transform-origin: 250px 250px;
  animation: haloBreathAnim 2.6s ease-in-out infinite;
}

@keyframes haloBreathAnim {
  0%, 100% { transform: scale(0.9); opacity: 0.35; }
  50% { transform: scale(1.18); opacity: 0.85; }
}

.ring-clockwise {
  transform-origin: 250px 250px;
  animation: rotateClock 10s linear infinite;
}

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

.ring-counter-clockwise {
  transform-origin: 250px 250px;
  animation: rotateCounter 14s linear infinite;
}

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

.shield-floating-body {
  transform-origin: 250px 250px;
  animation: shieldFloatAnim 4.2s ease-in-out infinite;
}

@keyframes shieldFloatAnim {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-15px); }
}

.guardian-eyes {
  transform-origin: 250px 256px;
  animation: eyeBlinkAnim 3.2s ease-in-out infinite;
}

@keyframes eyeBlinkAnim {
  0%, 88%, 100% { transform: scaleY(1); }
  93% { transform: scaleY(0.08); }
}

.corner-badge-pop {
  transform-origin: 362px 148px;
  animation: badgePopAnim 3.2s cubic-bezier(0.34, 1.56, 0.64, 1) infinite;
}

@keyframes badgePopAnim {
  0%, 75%, 100% { transform: scale(1); }
  83% { transform: scale(1.45); filter: drop-shadow(0 0 12px #4CC3FF); }
  92% { transform: scale(0.95); }
}

.bubble-float-1 {
  transform-origin: 85px 175px;
  animation: bubbleFloat1 4s ease-in-out infinite;
}

@keyframes bubbleFloat1 {
  0%, 100% { transform: translateY(0) scale(0.95); opacity: 0.75; }
  50% { transform: translateY(-12px) scale(1.08); opacity: 1; }
}

.bubble-float-2 {
  transform-origin: 410px 340px;
  animation: bubbleFloat2 4.6s ease-in-out infinite 0.8s;
}

@keyframes bubbleFloat2 {
  0%, 100% { transform: translateY(0) scale(0.95); opacity: 0.75; }
  50% { transform: translateY(-14px) scale(1.08); opacity: 1; }
}

.star-sparkle {
  transform-origin: 105px 365px;
  animation: starSparkleAnim 3s ease-in-out infinite 0.4s;
}

@keyframes starSparkleAnim {
  0%, 100% { transform: scale(0.7) rotate(0deg); opacity: 0.4; }
  50% { transform: scale(1.3) rotate(45deg); opacity: 1; filter: drop-shadow(0 0 8px #4CC3FF); }
}

/* 页面通用板块 */
.section {
  padding: 80px 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 50px;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.82rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--cyan-primary);
  margin-bottom: 12px;
  background: rgba(76, 195, 255, 0.1);
  padding: 4px 14px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-cyan);
}

.section-title {
  font-size: 2.3rem;
  font-weight: 900;
  margin-bottom: 14px;
  color: var(--text-white);
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* 核心优势卡片 */
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.adv-card {
  background: var(--bg-card);
  border: 1px solid var(--border-cyan);
  border-radius: var(--radius-lg);
  padding: 36px 30px;
  position: relative;
  overflow: hidden;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(12px);
}

.adv-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-cyan-bright);
  background: var(--bg-card-hover);
  box-shadow: var(--shadow-glow);
}

.adv-icon-wrap {
  width: 58px;
  height: 58px;
  border-radius: var(--radius-md);
  background: rgba(76, 195, 255, 0.12);
  border: 1px solid var(--border-cyan-bright);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  color: var(--cyan-primary);
  box-shadow: 0 0 15px rgba(76, 195, 255, 0.25);
}

.adv-title {
  font-size: 1.35rem;
  font-weight: 900;
  margin-bottom: 14px;
  color: var(--text-white);
  display: flex;
  align-items: center;
  gap: 8px;
}

.adv-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 24px;
  flex-grow: 1;
}

.adv-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.adv-tag {
  font-size: 0.8rem;
  font-weight: 600;
  padding: 5px 12px;
  background: rgba(76, 195, 255, 0.08);
  border: 1px solid var(--border-cyan);
  border-radius: var(--radius-sm);
  color: var(--cyan-light);
}

/* 流媒体与 AI 支持图卡 */
.media-ai-container {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
  margin-bottom: 30px;
}

.media-ai-card {
  background: var(--bg-card);
  border: 1px solid var(--border-cyan);
  border-radius: var(--radius-lg);
  padding: 36px;
  position: relative;
  transition: var(--transition);
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(12px);
}

.media-ai-card:hover {
  border-color: var(--border-cyan-bright);
  box-shadow: var(--shadow-glow);
}

.media-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 16px;
}

.media-header-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(76, 195, 255, 0.12);
  border: 1px solid var(--border-cyan-bright);
  color: var(--cyan-primary);
}

.media-title {
  font-size: 1.35rem;
  font-weight: 900;
  color: var(--text-white);
}

.media-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 24px;
}

.pill-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.media-pill {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
  background: rgba(10, 31, 77, 0.6);
  border: 1px solid var(--border-cyan);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-white);
  transition: var(--transition);
}

.media-pill:hover {
  border-color: var(--cyan-primary);
  background: rgba(76, 195, 255, 0.1);
}

.media-pill svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  color: var(--cyan-primary);
}

/* 客户端生态支持条 */
.client-ecosystem {
  background: var(--bg-card);
  border: 1px solid var(--border-cyan);
  border-radius: var(--radius-lg);
  padding: 24px 30px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(12px);
}

.client-info h4 {
  font-size: 1.1rem;
  margin-bottom: 4px;
  color: var(--text-white);
}

.client-info p {
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.client-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.client-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  background: rgba(76, 195, 255, 0.08);
  border: 1px solid var(--border-cyan);
  border-radius: var(--radius-full);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--cyan-light);
}

/* 套餐价格对比表 */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-bottom: 50px;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-cyan);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  position: relative;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(12px);
}

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

.pricing-card.featured {
  background: linear-gradient(180deg, rgba(16, 48, 120, 0.85) 0%, rgba(10, 31, 77, 0.95) 100%);
  border: 2px solid var(--cyan-primary);
  box-shadow: 0 0 35px rgba(76, 195, 255, 0.35);
}

.pricing-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--cyan-primary);
  color: #061838;
  padding: 5px 18px;
  border-radius: var(--radius-full);
  font-size: 0.82rem;
  font-weight: 900;
  letter-spacing: 0.05em;
  box-shadow: 0 4px 15px rgba(76, 195, 255, 0.5);
}

.pricing-name {
  font-size: 1.35rem;
  font-weight: 900;
  margin-bottom: 8px;
  color: var(--text-white);
}

.pricing-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  margin-bottom: 24px;
  min-height: 42px;
}

.pricing-price {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 24px;
}

.price-currency {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--cyan-primary);
}

.price-num {
  font-size: 3.2rem;
  color: var(--text-white);
  line-height: 1;
}

.price-period {
  font-size: 0.9rem;
  color: var(--text-muted);
  font-weight: 600;
}

.pricing-features {
  margin-bottom: 32px;
  flex-grow: 1;
}

.pricing-feature {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.92rem;
  color: var(--text-secondary);
  margin-bottom: 12px;
}

.pricing-feature svg {
  color: var(--cyan-primary);
  flex-shrink: 0;
}

/* 详细参数对比表 */
.table-wrapper {
  background: var(--bg-card);
  border: 1px solid var(--border-cyan);
  border-radius: var(--radius-lg);
  overflow-x: auto;
  padding: 24px;
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(12px);
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.92rem;
}

.comparison-table th,
.comparison-table td {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-cyan);
}

.comparison-table th {
  color: var(--text-white);
  font-weight: 800;
  background: rgba(76, 195, 255, 0.05);
}

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

.comparison-table td:first-child {
  font-weight: 700;
  color: var(--text-white);
}

.comparison-table td {
  color: var(--text-secondary);
}

.comparison-table .highlight-col {
  color: var(--cyan-primary);
  font-weight: 700;
  background: rgba(76, 195, 255, 0.06);
}

/* 用户评价 */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border-cyan);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(12px);
}

.review-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-cyan-bright);
  box-shadow: var(--shadow-glow);
}

.review-stars {
  display: flex;
  gap: 4px;
  color: var(--cyan-primary);
  margin-bottom: 16px;
  font-size: 0.95rem;
}

.review-quote {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 20px;
  flex-grow: 1;
}

.review-user {
  display: flex;
  align-items: center;
  gap: 12px;
}

.user-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(76, 195, 255, 0.15);
  border: 1px solid var(--border-cyan-bright);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 0.95rem;
  color: var(--cyan-primary);
}

.user-name {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--text-white);
}

.user-role {
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* 常见问题解答 */
.faq-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  max-width: 1040px;
  margin: 0 auto;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-cyan);
  border-radius: var(--radius-md);
  padding: 24px 26px;
  transition: var(--transition);
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(12px);
}

.faq-item:hover {
  border-color: var(--border-cyan-bright);
  background: var(--bg-card-hover);
}

.faq-question {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--text-white);
  margin-bottom: 12px;
}

.faq-question-num {
  font-size: 0.85rem;
  font-weight: 800;
  color: var(--cyan-primary);
  background: rgba(76, 195, 255, 0.15);
  border: 1px solid var(--border-cyan);
  padding: 2px 8px;
  border-radius: 4px;
}

.faq-answer {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.7;
  padding-left: 36px;
}

/* 底部 CTA 通栏 */
.bottom-cta {
  margin: 60px 0 20px;
  background: linear-gradient(135deg, rgba(16, 48, 120, 0.75) 0%, rgba(10, 31, 77, 0.9) 100%);
  border: 1px solid var(--border-cyan-bright);
  border-radius: var(--radius-lg);
  padding: 60px 40px;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-glow);
}

.bottom-cta-title {
  font-size: 2.2rem;
  font-weight: 900;
  margin-bottom: 14px;
  color: var(--text-white);
}

.bottom-cta-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 30px;
}

/* 页脚 */
.footer {
  border-top: 1px solid var(--border-cyan);
  background: rgba(6, 21, 54, 0.95);
  padding: 48px 0 36px;
  margin-top: 60px;
}

.footer-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 48px;
  margin-bottom: 24px;
}

.footer-link {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-secondary);
  transition: var(--transition);
  position: relative;
  padding: 6px 0;
}

.footer-link:hover {
  color: var(--cyan-primary);
  text-shadow: 0 0 8px rgba(76, 195, 255, 0.5);
}

.footer-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background: var(--cyan-primary);
  box-shadow: 0 0 8px var(--cyan-primary);
  transition: var(--transition);
}

.footer-link:hover::after {
  width: 100%;
}

.footer-copy {
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* 子页面正文框架 (about / terms / privacy / sitemap / wiki) */
.page-header {
  padding: 60px 0 40px;
  text-align: center;
  border-bottom: 1px solid var(--border-cyan);
  margin-bottom: 50px;
}

.page-title {
  font-size: 2.6rem;
  font-weight: 900;
  margin-bottom: 12px;
  color: var(--text-white);
}

.page-meta {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.article-content {
  max-width: 860px;
  margin: 0 auto 80px;
  background: var(--bg-card);
  border: 1px solid var(--border-cyan);
  border-radius: var(--radius-lg);
  padding: 48px;
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(12px);
}

.article-section {
  margin-bottom: 40px;
}

.article-section:last-child {
  margin-bottom: 0;
}

.article-h2 {
  font-size: 1.45rem;
  font-weight: 900;
  color: var(--text-white);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 10px;
  border-left: 4px solid var(--cyan-primary);
  padding-left: 12px;
}

.article-p {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 14px;
}

.article-list {
  margin-left: 20px;
  margin-bottom: 16px;
}

.article-list li {
  list-style-type: disc;
  font-size: 0.98rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 8px;
}

.highlight-box {
  background: rgba(76, 195, 255, 0.08);
  border: 1px solid var(--border-cyan-bright);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  margin: 20px 0;
  color: var(--text-white);
}

.warning-box {
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.35);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  margin: 20px 0;
}

.back-home-wrap {
  text-align: center;
  margin-top: 36px;
}

/* 响应式断点 */
@media (max-width: 1024px) {
  .hero-layout {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 50px;
  }
  .hero-left {
    text-align: center;
  }
  .hero-title-top {
    justify-content: center;
  }
  .hero-actions {
    justify-content: center;
  }
  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }
  .stat-item:nth-child(2)::after {
    display: none;
  }
  .advantages-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .reviews-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .navbar {
    padding: 12px 0;
  }
  .nav-links {
    display: none;
  }
  .hero-section {
    padding: 44px 0 36px;
  }
  .hero-title {
    font-size: 2.2rem;
  }
  .hero-actions {
    flex-direction: column;
    width: 100%;
  }
  .hero-actions .btn {
    width: 100%;
    min-height: 48px;
    font-size: 1rem;
  }
  .hero-stats {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .stat-item::after {
    display: none !important;
  }
  .stat-item {
    border-bottom: 1px solid var(--border-cyan);
    padding-bottom: 12px;
  }
  .stat-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
  }
  .advantages-grid {
    grid-template-columns: 1fr;
  }
  .media-ai-container {
    grid-template-columns: 1fr;
  }
  .pill-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .client-ecosystem {
    flex-direction: column;
    align-items: flex-start;
  }
  .pricing-grid {
    grid-template-columns: 1fr;
  }
  .pricing-card {
    padding: 32px 24px;
  }
  .pricing-card .btn {
    width: 100%;
    min-height: 46px;
  }
  .reviews-grid {
    grid-template-columns: 1fr;
  }
  .faq-grid {
    grid-template-columns: 1fr;
  }
  .faq-answer {
    padding-left: 0;
    margin-top: 6px;
  }
  .footer-nav {
    flex-direction: column;
    gap: 16px;
  }
  .bottom-cta {
    padding: 40px 20px;
  }
  .bottom-cta-title {
    font-size: 1.6rem;
  }
  .article-content {
    padding: 24px 18px;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }
  .hero-title {
    font-size: 1.85rem;
  }
  .pill-grid {
    grid-template-columns: 1fr;
  }
}


/* ===================================================================
   无障碍访问与增强响应式规范 (WCAG 2.1 AA 标准)
   =================================================================== */

/* 无障碍键盘快速跳转链接 (Skip Link) */
.skip-link {
  position: absolute;
  top: -100px;
  left: 24px;
  background: var(--cyan-primary);
  color: var(--bg-navy-dark);
  padding: 12px 22px;
  border-radius: var(--radius-sm);
  font-weight: 900;
  font-size: 0.95rem;
  z-index: 9999;
  transition: top 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  text-decoration: none;
  box-shadow: 0 4px 20px rgba(76, 195, 255, 0.5);
}
.skip-link:focus,
.skip-link:focus-visible {
  top: 20px;
  outline: 3px solid #FFFFFF;
  outline-offset: 2px;
}

/* 固定/吸顶页眉防遮挡锚点标题 */
section, [id], .article-post {
  scroll-margin-top: 86px;
}

/* 遵循系统无障碍动效减弱偏好 */
@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;
  }
}

/* 键盘焦点指示器 */
a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--cyan-primary);
  outline-offset: 3px;
}

/* 原生 details/summary FAQ 样式支持 */
details.faq-item summary.faq-question,
details.faq-block summary.faq-q {
  cursor: pointer;
  list-style: none;
  user-select: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
details.faq-item summary::-webkit-details-marker,
details.faq-block summary::-webkit-details-marker {
  display: none;
}
details.faq-item summary::after,
details.faq-block summary::after {
  content: "▾";
  font-size: 1.15rem;
  color: var(--cyan-primary);
  margin-left: auto;
  transition: transform 0.25s ease;
  flex-shrink: 0;
}
details[open].faq-item summary::after,
details[open].faq-block summary::after {
  transform: rotate(180deg);
}
details.faq-item summary {
  margin-bottom: 0;
}
details[open].faq-item summary {
  margin-bottom: 12px;
}
details.faq-block summary {
  margin-bottom: 0;
}
details[open].faq-block summary {
  margin-bottom: 8px;
}

/* 表格无障碍语义样式 */
.pricing-table caption {
  caption-side: top;
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--text-muted);
  text-align: left;
  margin-bottom: 14px;
}
.pricing-table th[scope="row"] {
  text-align: left;
  font-weight: 700;
  color: var(--text-white);
  padding: 16px 20px;
}