/* ==========================================================================
   赔钱机场 (Peiqian Airport) - 核心样式表
   主题风格：警示珊瑚 (Warning Coral) + 现代化极客暗黑风 + 动态终端图卡
   无任何第三方UI库依赖，纯原生CSS，秒开级极致性能
   ========================================================================== */

:root {
  /* 核心色彩 - 警示珊瑚系列 */
  --coral-primary: #FF4D30;
  --coral-light: #FF6B52;
  --coral-dark: #D9381E;
  --coral-glow: rgba(255, 77, 48, 0.32);
  --coral-soft: rgba(255, 77, 48, 0.12);
  --coral-border: rgba(255, 77, 48, 0.35);

  /* 背景与层次 */
  --bg-deep: #090B0E;
  --bg-surface: #10141D;
  --bg-card: #151A24;
  --bg-card-hover: #1C2332;
  --border-card: #222938;
  --border-light: rgba(255, 255, 255, 0.08);

  /* 文字颜色 */
  --text-main: #FFFFFF;
  --text-muted: #94A3B8;
  --text-subtle: #64748B;

  /* 状态与辅助色 */
  --color-success: #10B981;
  --color-warning: #F59E0B;
  --color-cyan: #06B6D4;
  --tag-bg: rgba(255, 255, 255, 0.06);

  /* 字体与动效 */
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  --shadow-card: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
  --shadow-coral: 0 8px 24px -4px var(--coral-glow);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--bg-deep);
  color: var(--text-main);
  font-family: var(--font-family);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  line-height: 1.6;
  overflow-x: hidden;
  background: radial-gradient(circle at 50% 0%, rgba(255, 77, 48, 0.1) 0%, transparent 55%),
              radial-gradient(circle at 85% 35%, rgba(255, 77, 48, 0.05) 0%, transparent 45%),
              var(--bg-deep);
  min-height: 100vh;
}

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

.container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
}

/* 章节通用样式 */
.app-section {
  padding: 96px 0;
  position: relative;
  scroll-margin-top: 76px;
}

.section-header {
  text-align: center;
  margin-bottom: 56px;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: var(--radius-full);
  background: var(--coral-soft);
  border: 1px solid var(--coral-border);
  color: var(--coral-light);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.section-tag::before {
  content: "";
  display: inline-block;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--coral-primary);
  box-shadow: 0 0 10px var(--coral-primary);
}

.section-title {
  font-size: 2.3rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text-main);
  margin-bottom: 14px;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 660px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ==========================================================================
   导航栏 Header (包含 Logo + 导航目录 + CTA)
   ========================================================================== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(9, 11, 14, 0.88);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--border-light);
  transition: all var(--transition-normal);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 74px;
  gap: 20px;
}

/* 左上角Logo与交互动效 */
.logo-btn {
  display: flex;
  align-items: center;
  gap: 12px;
  cursor: pointer;
  background: transparent;
  border: none;
  color: var(--text-main);
  padding: 6px 8px;
  border-radius: var(--radius-sm);
  transition: transform var(--transition-normal);
  user-select: none;
}

.logo-btn:hover {
  transform: scale(1.04);
}

.logo-btn:active {
  transform: scale(0.96);
}

.logo-icon-wrap {
  width: 40px;
  height: 40px;
  border-radius: 11px;
  background: linear-gradient(135deg, var(--coral-primary) 0%, #BA240D 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-coral);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.logo-icon-wrap::after {
  content: "";
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: linear-gradient(45deg, transparent, rgba(255,255,255,0.25), transparent);
  transform: rotate(45deg);
  animation: logoShine 4s infinite;
}

@keyframes logoShine {
  0% { transform: translateX(-100%) rotate(45deg); }
  25%, 100% { transform: translateX(100%) rotate(45deg); }
}

.logo-btn:hover .logo-icon-wrap {
  box-shadow: 0 0 22px rgba(255, 77, 48, 0.8);
  transform: rotate(-6deg);
}

.logo-icon-wrap svg {
  width: 22px;
  height: 22px;
  fill: #FFFFFF;
}

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

.logo-title {
  font-size: 1.25rem;
  font-weight: 900;
  letter-spacing: -0.01em;
  background: linear-gradient(90deg, #FFFFFF 60%, var(--coral-light) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.logo-tagline {
  font-size: 0.7rem;
  color: var(--text-muted);
  letter-spacing: 0.08em;
}

/* 页眉中间导航目录 */
.nav-menu {
  display: flex;
  align-items: center;
  gap: 8px;
  list-style: none;
}

.nav-link {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-muted);
  padding: 8px 14px;
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
}

.nav-link:hover {
  color: #FFFFFF;
  background: rgba(255, 255, 255, 0.06);
}

.nav-link.active {
  color: var(--coral-light);
  background: var(--coral-soft);
}

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

/* 按钮通用 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  padding: 11px 24px;
  border-radius: var(--radius-full);
  cursor: pointer;
  border: 1px solid transparent;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn-coral {
  background: linear-gradient(135deg, var(--coral-light) 0%, var(--coral-primary) 100%);
  color: #FFFFFF;
  box-shadow: var(--shadow-coral);
}

.btn-coral:hover {
  background: linear-gradient(135deg, #FF7F68 0%, var(--coral-dark) 100%);
  transform: translateY(-2px);
  box-shadow: 0 10px 28px -2px rgba(255, 77, 48, 0.45);
}

.btn-coral:active {
  transform: translateY(0);
}

.btn-outline-coral {
  background: rgba(255, 77, 48, 0.08);
  border: 1px solid var(--coral-light);
  color: #FFFFFF;
  box-shadow: 0 4px 18px -2px rgba(255, 77, 48, 0.25);
}

.btn-outline-coral:hover {
  background: linear-gradient(135deg, var(--coral-primary) 0%, var(--coral-dark) 100%);
  border-color: transparent;
  color: #FFFFFF;
  transform: translateY(-2px);
  box-shadow: 0 10px 28px -2px rgba(255, 77, 48, 0.45);
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--border-light);
  color: var(--text-main);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-2px);
}

/* ==========================================================================
   主视觉区 (Hero Section - 左右分栏 + 动态图卡)
   ========================================================================== */
.hero-section {
  padding-top: 140px;
  padding-bottom: 80px;
  position: relative;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 40px;
  align-items: center;
  margin-bottom: 60px;
}

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

.hero-badge-pill {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 18px;
  border-radius: var(--radius-full);
  background: rgba(255, 77, 48, 0.09);
  border: 1px solid var(--coral-border);
  color: var(--coral-light);
  font-size: 0.88rem;
  font-weight: 600;
  margin-bottom: 24px;
  animation: pulseBadge 3s infinite;
}

@keyframes pulseBadge {
  0%, 100% { box-shadow: 0 0 0 0 rgba(255, 77, 48, 0.25); }
  50% { box-shadow: 0 0 0 10px rgba(255, 77, 48, 0); }
}

.hero-title {
  font-size: clamp(2.4rem, 4.2vw, 3.8rem);
  font-weight: 900;
  line-height: 1.18;
  letter-spacing: -0.025em;
  margin-bottom: 22px;
  color: #FFFFFF;
}

.highlight-coral {
  color: var(--coral-primary);
  position: relative;
  display: inline-block;
  background: linear-gradient(135deg, #FF7860 0%, var(--coral-primary) 50%, #FF3310 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.12rem;
  color: var(--text-muted);
  margin-bottom: 34px;
  line-height: 1.7;
  max-width: 620px;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

.hero-cta-group .btn {
  padding: 14px 28px;
  font-size: 1rem;
}

/* 右侧：高科技动态专线监控面板 (Live Tech Panel) */
.hero-right {
  position: relative;
}

.tech-live-panel {
  background: rgba(18, 23, 33, 0.85);
  border: 1px solid var(--coral-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.6), 0 0 30px rgba(255, 77, 48, 0.15);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  position: relative;
  overflow: hidden;
}

.tech-live-panel::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--coral-primary), var(--coral-light), transparent);
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 16px;
  margin-bottom: 18px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.window-dots {
  display: flex;
  align-items: center;
  gap: 6px;
}

.window-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.dot-red { background: #FF5F56; }
.dot-yellow { background: #FFBD2E; }
.dot-green { background: #27C93F; }

.panel-status-tag {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.78rem;
  color: var(--color-success);
  font-family: monospace;
  background: rgba(16, 185, 129, 0.12);
  padding: 3px 10px;
  border-radius: var(--radius-full);
}

.status-beacon {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--color-success);
  box-shadow: 0 0 8px var(--color-success);
  animation: pulseBeacon 1.8s infinite;
}

@keyframes pulseBeacon {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.8); }
}

/* 实时吞吐仪表 */
.live-speed-box {
  background: rgba(9, 11, 14, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.speed-metric-title {
  font-size: 0.78rem;
  color: var(--text-subtle);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 4px;
}

.speed-metric-val {
  font-size: 1.85rem;
  font-weight: 900;
  color: #FFFFFF;
  font-family: monospace;
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.speed-metric-val span {
  font-size: 0.85rem;
  color: var(--coral-light);
  font-weight: 600;
}

.speed-visual-wave {
  display: flex;
  align-items: flex-end;
  gap: 4px;
  height: 36px;
}

.wave-bar {
  width: 4px;
  background: var(--coral-primary);
  border-radius: 2px;
  animation: waveBar 1.2s ease-in-out infinite alternate;
}

.wave-bar:nth-child(1) { height: 40%; animation-delay: 0.1s; }
.wave-bar:nth-child(2) { height: 75%; animation-delay: 0.3s; }
.wave-bar:nth-child(3) { height: 95%; animation-delay: 0.2s; }
.wave-bar:nth-child(4) { height: 60%; animation-delay: 0.5s; }
.wave-bar:nth-child(5) { height: 85%; animation-delay: 0.4s; }

@keyframes waveBar {
  0% { transform: scaleY(0.4); opacity: 0.5; }
  100% { transform: scaleY(1); opacity: 1; }
}

/* 节点延迟监控列表 */
.node-radar-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.node-radar-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  transition: all var(--transition-fast);
}

.node-radar-item:hover {
  background: rgba(255, 77, 48, 0.08);
  border-color: var(--coral-border);
}

.node-name-group {
  display: flex;
  align-items: center;
  gap: 8px;
}

.node-flag {
  font-size: 1rem;
}

.node-label {
  font-weight: 600;
  color: #FFFFFF;
}

.node-spec {
  font-size: 0.75rem;
  color: var(--text-subtle);
  margin-left: 6px;
}

.node-ping {
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: monospace;
  font-weight: 700;
  font-size: 0.84rem;
  color: var(--color-success);
}

.node-ping::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-success);
}

/* 信任指标/状态栏 */
.hero-trust-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px;
  background: var(--bg-surface);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
}

.trust-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  position: relative;
}

.trust-item:not(:last-child)::after {
  content: "";
  position: absolute;
  right: -10px;
  top: 15%;
  height: 70%;
  width: 1px;
  background: var(--border-card);
}

.trust-num {
  font-size: 1.7rem;
  font-weight: 800;
  color: #FFFFFF;
  margin-bottom: 4px;
}

.trust-num span {
  color: var(--coral-light);
  font-size: 1.1rem;
}

.trust-label {
  font-size: 0.85rem;
  color: var(--text-subtle);
}

/* ==========================================================================
   产品核心优势介绍 (增强细节与光效)
   ========================================================================== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 38px 28px;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.feature-index {
  position: absolute;
  top: 24px;
  right: 28px;
  font-size: 2.4rem;
  font-weight: 900;
  color: rgba(255, 255, 255, 0.04);
  font-family: monospace;
  pointer-events: none;
}

.feature-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--coral-primary), transparent);
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.feature-card:hover {
  transform: translateY(-7px);
  background: var(--bg-card-hover);
  border-color: var(--coral-border);
  box-shadow: 0 16px 36px -10px rgba(0, 0, 0, 0.6), var(--shadow-coral);
}

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

.feature-icon-box {
  width: 60px;
  height: 60px;
  border-radius: var(--radius-md);
  background: var(--coral-soft);
  border: 1px solid var(--coral-border);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  color: var(--coral-light);
  box-shadow: 0 0 16px rgba(255, 77, 48, 0.15);
}

.feature-icon-box svg {
  width: 30px;
  height: 30px;
  stroke: currentColor;
}

.feature-title {
  font-size: 1.35rem;
  font-weight: 700;
  color: #FFFFFF;
  margin-bottom: 12px;
}

.feature-desc {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 24px;
}

.feature-metrics {
  margin-top: auto;
  padding-top: 18px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.82rem;
  color: var(--coral-light);
  font-weight: 600;
}

/* ==========================================================================
   流媒体与 AI 支持图卡 (高精度矢量图标 + 呼吸灯)
   ========================================================================== */
.media-ai-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
}

.media-ai-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 34px;
  transition: all var(--transition-normal);
  position: relative;
}

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

.category-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-card);
}

.category-title {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.25rem;
  font-weight: 700;
}

.category-badge {
  font-size: 0.78rem;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  background: rgba(16, 185, 129, 0.12);
  color: var(--color-success);
  border: 1px solid rgba(16, 185, 129, 0.25);
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 6px;
}

.category-badge::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-success);
  box-shadow: 0 0 6px var(--color-success);
}

.items-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}

.service-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.service-item:hover {
  background: rgba(255, 77, 48, 0.08);
  border-color: var(--coral-border);
  transform: translateX(4px);
}

.service-brand-icon {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: 0 4px 12px rgba(0,0,0,0.3);
}

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

.service-info {
  display: flex;
  flex-direction: column;
}

.service-name {
  font-size: 0.94rem;
  font-weight: 700;
  color: #FFFFFF;
}

.service-status {
  font-size: 0.76rem;
  color: var(--color-success);
}

/* ==========================================================================
   套餐价格对比表 (参考行业真实套餐体系 + 赔钱补贴透明公示)
   ========================================================================== */
.pricing-loss-banner {
  background: rgba(255, 77, 48, 0.08);
  border: 1px dashed var(--coral-border);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  max-width: 880px;
  margin: -24px auto 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  text-align: center;
  font-size: 0.92rem;
  color: #FFFFFF;
}

.pricing-loss-banner strong {
  color: var(--coral-light);
}

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

.price-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 38px 28px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all var(--transition-normal);
}

.price-card:hover {
  transform: translateY(-6px);
  border-color: rgba(255, 255, 255, 0.2);
}

.price-card.popular {
  background: linear-gradient(180deg, #1C2333 0%, var(--bg-card) 100%);
  border: 2px solid var(--coral-primary);
  box-shadow: 0 12px 36px -8px var(--coral-glow);
  transform: scale(1.03);
}

.price-card.popular:hover {
  transform: scale(1.03) translateY(-6px);
}

.popular-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(90deg, #FF6B52, var(--coral-primary));
  color: #FFFFFF;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  padding: 4px 16px;
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-coral);
  white-space: nowrap;
}

.plan-name {
  font-size: 1.35rem;
  font-weight: 800;
  color: #FFFFFF;
  margin-bottom: 6px;
}

.plan-desc {
  font-size: 0.86rem;
  color: var(--text-subtle);
  margin-bottom: 20px;
}

.plan-price-wrap {
  display: flex;
  align-items: baseline;
  gap: 6px;
  margin-bottom: 6px;
  flex-wrap: wrap;
}

.plan-currency {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--coral-light);
}

.plan-amount {
  font-size: 3rem;
  font-weight: 900;
  color: #FFFFFF;
  line-height: 1;
  letter-spacing: -0.03em;
}

.plan-cycle {
  font-size: 0.92rem;
  color: var(--text-subtle);
}

.plan-original-price {
  font-size: 0.88rem;
  color: var(--text-subtle);
  text-decoration: line-through;
  margin-left: 4px;
}

.plan-subsidy {
  font-size: 0.8rem;
  color: var(--coral-primary);
  background: var(--coral-soft);
  padding: 3px 12px;
  border-radius: var(--radius-full);
  display: inline-block;
  margin-bottom: 22px;
  font-weight: 600;
  width: fit-content;
}

.plan-features {
  list-style: none;
  margin: 0 0 32px 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 13px;
}

.plan-features li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.92rem;
  color: var(--text-muted);
}

.plan-features li svg {
  width: 17px;
  height: 17px;
  stroke: var(--coral-light);
  flex-shrink: 0;
}

/* ==========================================================================
   SEO 文章专栏图卡 (Articles Section)
   ========================================================================== */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 26px;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.article-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--coral-primary), transparent);
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.article-card:hover {
  transform: translateY(-6px);
  background: var(--bg-card-hover);
  border-color: var(--coral-border);
  box-shadow: 0 16px 36px -10px rgba(0, 0, 0, 0.6), var(--shadow-coral);
}

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

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

.article-badge {
  font-size: 0.75rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  background: var(--coral-soft);
  color: var(--coral-light);
  border: 1px solid var(--coral-border);
}

.article-time {
  font-size: 0.75rem;
  color: var(--text-subtle);
}

.article-card-title {
  font-size: 1.15rem;
  font-weight: 750;
  color: #FFFFFF;
  line-height: 1.45;
  margin-bottom: 12px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  transition: color var(--transition-fast);
}

.article-card:hover .article-card-title {
  color: var(--coral-light);
}

.article-card-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 22px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-card-footer {
  margin-top: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 16px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  gap: 10px;
}

.btn-read-article {
  font-size: 0.84rem;
  color: var(--coral-light);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.btn-read-article:hover {
  text-decoration: underline;
}

.btn-article-aff {
  font-size: 0.82rem;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  background: rgba(255, 77, 48, 0.12);
  color: #FFFFFF;
  border: 1px solid var(--coral-border);
  font-weight: 600;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn-article-aff:hover {
  background: var(--coral-primary);
  color: #FFFFFF;
  box-shadow: 0 4px 14px var(--coral-glow);
}

/* ==========================================================================
   用户评价 (Testimonials)
   ========================================================================== */

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

.testimonial-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all var(--transition-normal);
}

.testimonial-card:hover {
  transform: translateY(-5px);
  border-color: rgba(255, 255, 255, 0.15);
}

.stars {
  color: #F59E0B;
  font-size: 1rem;
  letter-spacing: 2px;
  margin-bottom: 14px;
}

.testimonial-text {
  font-size: 0.94rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 22px;
  font-style: italic;
}

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

.user-avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: linear-gradient(135deg, #2D3748, #1A202C);
  border: 1px solid var(--coral-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: var(--coral-light);
  font-size: 0.92rem;
}

.user-info-name {
  font-size: 0.92rem;
  font-weight: 700;
  color: #FFFFFF;
}

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

/* ==========================================================================
   常见问题解答 (FAQ)
   ========================================================================== */
.faq-wrap {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

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

.faq-item:hover {
  border-color: rgba(255, 255, 255, 0.15);
}

.faq-question {
  width: 100%;
  padding: 20px 24px;
  background: transparent;
  border: none;
  color: #FFFFFF;
  font-size: 1.05rem;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  transition: color var(--transition-fast);
}

.faq-item.active .faq-question {
  color: var(--coral-light);
}

.faq-toggle-icon {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.05);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  line-height: 1;
  transition: transform var(--transition-normal);
  color: var(--text-muted);
}

.faq-item.active .faq-toggle-icon {
  transform: rotate(45deg);
  background: var(--coral-soft);
  color: var(--coral-light);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease-out, padding 0.35s ease;
  padding: 0 24px;
  color: var(--text-muted);
  font-size: 0.94rem;
  line-height: 1.7;
}

.faq-item.active .faq-answer {
  max-height: 300px;
  padding: 0 24px 20px 24px;
}

/* ==========================================================================
   页脚 Footer (极简四大项)
   ========================================================================== */
.site-footer {
  background: #060709;
  border-top: 1px solid var(--border-card);
  padding: 48px 0 36px;
  text-align: center;
}

.footer-nav-list {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 36px;
  list-style: none;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.footer-nav-link {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-muted);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.footer-nav-link:hover {
  color: var(--coral-light);
  background: var(--coral-soft);
}

.footer-copyright {
  font-size: 0.82rem;
  color: var(--text-subtle);
}

.footer-friend-links {
  text-align: center;
  margin: 22px 0 14px;
  font-size: 0.92rem;
  color: var(--text-muted);
}

.footer-seo-link {
  color: var(--text-muted);
  font-weight: 600;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.footer-seo-link:hover {
  color: var(--coral-light);
  background: var(--coral-soft);
  text-decoration: underline;
}

.footer-status-bar {
  margin: 12px 0 18px;
  font-size: 0.85rem;
  color: var(--text-subtle);
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
}


/* ==========================================================================
   右侧悬浮章节切换控制器 (Section Navigator)
   ========================================================================== */
.section-nav-controller {
  position: fixed;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 999;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding: 10px 8px;
  background: rgba(16, 20, 29, 0.88);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-full);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: all var(--transition-normal);
}

.nav-arrow-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  color: var(--text-main);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.22s cubic-bezier(0.34, 1.56, 0.64, 1);
  outline: none;
  position: relative;
  overflow: hidden;
}

.nav-arrow-btn:hover {
  background: var(--coral-primary);
  border-color: var(--coral-light);
  color: #FFFFFF;
  transform: scale(1.15);
  box-shadow: 0 0 16px var(--coral-primary);
}

.nav-arrow-btn:active {
  transform: scale(0.9);
}

.nav-arrow-btn svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
  transition: transform var(--transition-fast);
}

.nav-arrow-btn.btn-prev:hover svg {
  transform: translateY(-2px);
}

.nav-arrow-btn.btn-next:hover svg {
  transform: translateY(2px);
}

.nav-indicators {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 4px 0;
}

.indicator-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.22);
  transition: all var(--transition-fast);
  cursor: pointer;
}

.indicator-dot:hover {
  background: var(--coral-light);
  transform: scale(1.4);
}

.indicator-dot.active {
  background: var(--coral-primary);
  height: 16px;
  border-radius: 4px;
  box-shadow: 0 0 8px var(--coral-primary);
}

/* ==========================================================================
   响应式媒体查询 (移动端优先极致适配)
   ========================================================================== */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }

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

  .hero-subtitle {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-cta-group {
    justify-content: center;
  }

  .nav-menu {
    display: none; /* 移动端精简页眉，突出CTA */
  }
}

@media (max-width: 992px) {
  .features-grid,
  .pricing-grid,
  .testimonials-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .media-ai-container {
    grid-template-columns: 1fr;
  }

  .price-card.popular {
    transform: none;
  }
  
  .price-card.popular:hover {
    transform: translateY(-4px);
  }

  .hero-trust-bar {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

  .trust-item:nth-child(2)::after {
    display: none;
  }
}

@media (max-width: 768px) {
  .app-section {
    padding: 60px 0;
  }

  .section-title {
    font-size: 1.85rem;
  }

  .hero-section {
    padding-top: 105px;
    padding-bottom: 50px;
  }

  .hero-title {
    font-size: 2rem;
  }

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

  .hero-cta-group .btn {
    width: 100%;
    padding: 15px 24px;
    font-size: 1.02rem;
  }

  .items-grid {
    grid-template-columns: 1fr;
  }

  .section-nav-controller {
    right: 8px;
    padding: 6px 4px;
    background: rgba(16, 20, 29, 0.94);
  }

  .nav-arrow-btn {
    width: 36px;
    height: 36px;
  }

  .footer-nav-list {
    gap: 16px;
  }
}

@media (max-width: 480px) {
  .hero-trust-bar {
    grid-template-columns: 1fr;
  }

  .trust-item::after {
    display: none !important;
  }

  .footer-nav-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }
}