/* ==========================================================================
   91机场网 (91Jichang.buzz) 官方原生样式表
   规范：纯原生CSS，无任何重型框架，秒开级极致性能，硬件加速动态背景
   ========================================================================== */

:root {
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Monaco, Consolas, "Liberation Mono", monospace;

  /* 主色调与科技霓虹渐变 */
  --color-primary: #00F0FF;
  --color-primary-rgb: 0, 240, 255;
  --color-secondary: #3B82F6;
  --color-accent: #8B5CF6;
  --color-accent-pink: #EC4899;
  --color-success: #10B981;
  --color-warning: #F59E0B;

  /* 基础暗色背景层 */
  --bg-dark-900: #040711;
  --bg-dark-800: #090E1D;
  --bg-dark-700: #0F172A;
  --bg-dark-600: #1E293B;
  --bg-card: rgba(15, 23, 42, 0.75);
  --bg-card-hover: rgba(30, 41, 59, 0.85);

  /* 文本色阶 */
  --text-main: #F8FAFC;
  --text-muted: #94A3B8;
  --text-dim: #64748B;
  --text-white: #FFFFFF;

  /* 边框与阴影 */
  --border-light: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(0, 240, 255, 0.4);
  --border-card: rgba(56, 189, 248, 0.15);
  --shadow-glow: 0 0 25px rgba(0, 240, 255, 0.25);
  --shadow-card: 0 10px 30px -10px rgba(0, 0, 0, 0.5);

  /* 间距与圆角 */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-full: 9999px;

  /* 容器宽度 */
  --container-max: 1240px;
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

/* CSS 重置与盒模型 */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  scroll-behavior: smooth;
  background-color: var(--bg-dark-900);
  color: var(--text-main);
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  position: relative;
  min-height: 100vh;
  overflow-x: hidden;
  background-color: var(--bg-dark-900);
}

/* ==========================================================================
   2026 宁静深空星系与自然繁星背景 (Serene Night Sky & Subtle Nebula)
   视觉极度舒适 · 稳固零眩晕感 · 纯原生 CSS · 硬件 GPU 加速 · 60FPS 丝滑流畅
   ========================================================================== */
.dynamic-cosmos-bg {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
  background-color: #030712;
}

/* 宁静天文级深空星云底图 (超清自然星空，水平延展，完全固定无晃动) */
.cosmos-hd-backdrop {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  background: url("assets/cosmos-bg.jpg") no-repeat center center / cover;
  opacity: 0.94;
  filter: saturate(1.08) contrast(1.04) brightness(0.96);
  /* 彻底移除全屏平移、缩放与晃动动画，视觉稳固舒适，彻底杜绝眩晕感 */
  pointer-events: none;
}

/* 宇宙星系柔和暗角遮罩，平衡景深与文字对比度 */
.cosmos-vignette-overlay {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 95% 75% at 50% 35%, rgba(3, 7, 18, 0.16) 0%, rgba(3, 7, 18, 0.46) 60%, rgba(2, 5, 14, 0.78) 100%);
  pointer-events: none;
}

/* 第一层：致密细小微弱闪烁星辰 (原地光度微颤，无位移) */
.stars-field-1 {
  position: absolute;
  inset: 0;
  background-image: 
    radial-gradient(circle, #ffffff 1.2px, transparent 1.5px),
    radial-gradient(circle, #93c5fd 1.5px, transparent 1.8px),
    radial-gradient(circle, #fde047 1.4px, transparent 1.7px),
    radial-gradient(circle, #ffffff 1.0px, transparent 1.3px),
    radial-gradient(circle, #a78bfa 1.4px, transparent 1.7px);
  background-position: 
    30px 40px, 140px 190px, 280px 80px, 420px 300px, 570px 150px;
  background-size: 850px 420px;
  background-repeat: repeat;
  animation: gentleTwinkle1 4s ease-in-out infinite alternate;
  opacity: 0.65;
  pointer-events: none;
}

/* 第二层：柔和微光星辉 (原地明暗呼吸，无晃动) */
.stars-field-2 {
  position: absolute;
  inset: 0;
  background-image: 
    radial-gradient(circle, #ffffff 1.8px, transparent 2.2px),
    radial-gradient(circle, #38bdf8 1.6px, transparent 2.0px),
    radial-gradient(circle, #fef08a 1.8px, transparent 2.2px);
  background-position: 80px 110px, 230px 320px, 470px 60px;
  background-size: 750px 380px;
  background-repeat: repeat;
  animation: gentleTwinkle2 6s ease-in-out infinite alternate;
  opacity: 0.55;
  pointer-events: none;
}

/* 优雅偶现流星 (极度平滑舒缓，绝不眼花) */
.shooting-star {
  position: absolute;
  height: 2px;
  background: linear-gradient(to right, rgba(255, 255, 255, 0) 0%, rgba(56, 189, 248, 0.4) 40%, rgba(255, 255, 255, 0.9) 100%);
  border-radius: 999px;
  box-shadow: 0 0 8px #ffffff, 0 0 16px #38bdf8;
  transform: rotate(-32deg);
  opacity: 0;
  pointer-events: none;
  will-change: transform, opacity;
}

.meteor-1 {
  top: 10%;
  right: 18%;
  width: 150px;
  animation: meteorFlyGentle 12s cubic-bezier(0.2, 0.8, 0.2, 1) infinite;
}

.meteor-2 {
  top: 36%;
  right: 8%;
  width: 180px;
  animation: meteorFlyGentle 16s cubic-bezier(0.2, 0.8, 0.2, 1) 5s infinite;
}

/* 关键帧动画：仅原地微光呼吸，绝无整体画面移动与镜头缩放！ */
@keyframes gentleTwinkle1 {
  0% { opacity: 0.35; }
  50% { opacity: 0.75; }
  100% { opacity: 0.45; }
}

@keyframes gentleTwinkle2 {
  0% { opacity: 0.65; }
  50% { opacity: 0.30; }
  100% { opacity: 0.70; }
}

@keyframes meteorFlyGentle {
  0% { transform: translate(0, 0) rotate(-32deg); opacity: 0; }
  8% { opacity: 0.85; }
  20% { transform: translate(-700px, 437px) rotate(-32deg); opacity: 0; }
  100% { transform: translate(-700px, 437px) rotate(-32deg); opacity: 0; }
}

/* 核心布局容器 */
.site-wrapper {
  position: relative;
  z-index: 1;
}

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

/* 顶部公告条 */
.top-announcement {
  background: linear-gradient(90deg, rgba(0, 240, 255, 0.15), rgba(139, 92, 246, 0.15));
  border-bottom: 1px solid rgba(0, 240, 255, 0.2);
  padding: 8px 16px;
  font-size: 0.85rem;
  color: #E2E8F0;
  text-align: center;
  backdrop-filter: blur(8px);
}

.announcement-badge {
  display: inline-block;
  padding: 2px 8px;
  font-size: 0.75rem;
  font-weight: 700;
  border-radius: var(--radius-full);
  background: var(--color-primary);
  color: #040711;
  margin-right: 8px;
  letter-spacing: 0.5px;
}

/* 顶部导航栏 - 左上方Logo规范 */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(4, 7, 17, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-light);
  transition: all var(--transition-fast);
}

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

.nav-brand {
  display: flex;
  align-items: center;
}

.nav-brand a {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
}

.nav-brand-logo {
  height: 44px;
  width: auto;
  max-width: 260px;
  object-fit: contain;
  transition: transform var(--transition-fast);
}

.nav-brand-logo:hover {
  transform: scale(1.02);
}

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

.nav-link {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: color var(--transition-fast);
  position: relative;
  padding: 6px 0;
}

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

.nav-link.active::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--color-primary);
  border-radius: var(--radius-full);
  box-shadow: 0 0 8px var(--color-primary);
}

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

/* 按钮通用规范 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 600;
  line-height: 1;
  padding: 12px 24px;
  border-radius: var(--radius-full);
  text-decoration: none;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

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

.btn-lg {
  padding: 16px 36px;
  font-size: 1.1rem;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: #040711;
  font-weight: 700;
  box-shadow: 0 4px 18px rgba(0, 240, 255, 0.35);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #38BDF8, #60A5FA);
  box-shadow: 0 6px 25px rgba(0, 240, 255, 0.55);
  transform: translateY(-2px);
  color: #040711;
}

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

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

.btn-outline-glow {
  background: transparent;
  color: var(--color-primary);
  border: 1.5px solid var(--color-primary);
  box-shadow: 0 0 15px rgba(0, 240, 255, 0.15);
}

.btn-outline-glow:hover {
  background: rgba(0, 240, 255, 0.1);
  box-shadow: 0 0 25px rgba(0, 240, 255, 0.35);
  color: #FFFFFF;
}

.btn-block {
  width: 100%;
}

/* Hero 首屏核心区域 */
.hero-section {
  padding: 70px 0 60px;
  text-align: center;
  position: relative;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 18px;
  border-radius: var(--radius-full);
  background: rgba(0, 240, 255, 0.08);
  border: 1px solid rgba(0, 240, 255, 0.25);
  font-size: 0.85rem;
  color: var(--color-primary);
  margin-bottom: 24px;
  backdrop-filter: blur(10px);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-success);
  box-shadow: 0 0 10px var(--color-success);
  display: inline-block;
  animation: pulseDot 2s infinite;
}

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

.hero-title {
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -0.5px;
  margin-bottom: 20px;
}

.text-gradient {
  background: linear-gradient(135deg, #FFFFFF 20%, var(--color-primary) 65%, #A78BFA 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-desc {
  max-width: 800px;
  margin: 0 auto 36px;
  font-size: clamp(1rem, 1.8vw, 1.15rem);
  color: var(--text-muted);
  line-height: 1.7;
}

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

/* 核心数据背书条 */
.hero-stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  max-width: 980px;
  margin: 0 auto;
  padding: 24px 30px;
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(16px);
}

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

.stat-value {
  font-size: 2rem;
  font-weight: 800;
  font-family: var(--font-mono);
  color: var(--text-white);
  line-height: 1.1;
  margin-bottom: 4px;
}

.stat-value span {
  font-size: 1.1rem;
  color: var(--color-primary);
  margin-left: 2px;
}

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

/* 通用章节规范 */
.section-padding {
  padding: 80px 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 1150px;
  margin: 0 auto 50px;
  padding: 0 16px;
}

.section-tag {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.section-title {
  font-size: clamp(1.4rem, 2.6vw, 2.3rem);
  font-weight: 800;
  line-height: 1.3;
  color: var(--text-white);
  margin-bottom: 14px;
  letter-spacing: -0.2px;
}

@media (min-width: 768px) {
  .section-title {
    white-space: nowrap;
  }
}

@media (max-width: 767px) {
  .section-title {
    font-size: clamp(1.2rem, 4.5vw, 1.55rem);
    text-wrap: balance;
  }
}

.section-desc {
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.65;
  max-width: 780px;
  margin-left: auto;
  margin-right: auto;
}

/* ==========================================================================
   套餐价格方案 (核心要求：所有价格要同排展示)
   ========================================================================== */
.pricing-section {
  background: linear-gradient(180deg, rgba(4, 7, 17, 0) 0%, rgba(15, 23, 42, 0.6) 50%, rgba(4, 7, 17, 0) 100%);
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
}

/* 同排价格网格：桌面端强制 4 列并列同排 */
.pricing-grid-same-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  align-items: stretch;
}

.pricing-card {
  background: rgba(15, 23, 42, 0.7);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all var(--transition-normal);
  backdrop-filter: blur(14px);
}

.pricing-card:hover {
  transform: translateY(-6px);
  border-color: var(--color-primary);
  box-shadow: 0 15px 35px -10px rgba(0, 240, 255, 0.25);
}

/* 热门推荐卡片高亮样式 */
.pricing-card.featured {
  background: linear-gradient(180deg, rgba(15, 23, 42, 0.9) 0%, rgba(30, 41, 59, 0.8) 100%);
  border: 2px solid var(--color-primary);
  box-shadow: 0 12px 35px -5px rgba(0, 240, 255, 0.35);
  transform: scale(1.02);
  z-index: 2;
}

.pricing-card.featured:hover {
  transform: scale(1.02) translateY(-6px);
  box-shadow: 0 20px 45px -5px rgba(0, 240, 255, 0.5);
}

.featured-badge {
  position: absolute;
  top: -13px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: #040711;
  font-size: 0.75rem;
  font-weight: 800;
  padding: 4px 14px;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  white-space: nowrap;
}

.plan-type {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--color-primary);
  letter-spacing: 1px;
  margin-bottom: 6px;
}

.plan-name {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-white);
  margin-bottom: 14px;
}

.plan-price-wrap {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 14px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-light);
}

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

.price-amount {
  font-size: 2.5rem;
  font-weight: 900;
  font-family: var(--font-mono);
  color: var(--text-white);
  line-height: 1;
}

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

.plan-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.5;
  margin-bottom: 22px;
  min-height: 42px;
}

.plan-features-list {
  list-style: none;
  margin-bottom: 28px;
  flex-grow: 1;
}

.plan-feature-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.875rem;
  color: var(--text-main);
  margin-bottom: 12px;
  line-height: 1.4;
}

.plan-feature-icon {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  color: var(--color-success);
  margin-top: 2px;
}

.feature-bold {
  color: var(--text-white);
  font-weight: 700;
}

.plan-action {
  margin-top: auto;
}

.pricing-guarantee-note {
  margin-top: 36px;
  text-align: center;
  font-size: 0.875rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
}

.guarantee-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

/* ==========================================================================
   核心特性卡片网格
   ========================================================================== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-box {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 30px;
  transition: all var(--transition-normal);
  backdrop-filter: blur(10px);
}

.feature-box:hover {
  transform: translateY(-4px);
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
}

.feature-icon-wrapper {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  background: rgba(0, 240, 255, 0.1);
  border: 1px solid rgba(0, 240, 255, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  color: var(--color-primary);
}

.feature-box-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: 10px;
}

.feature-box-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ==========================================================================
   全球专线网络与实时节点监控表格
   ========================================================================== */
.nodes-table-wrapper {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.nodes-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.9rem;
}

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

.nodes-table th {
  background: rgba(15, 23, 42, 0.9);
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

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

.nodes-table tbody tr:hover td {
  background: rgba(0, 240, 255, 0.03);
}

.node-region-cell {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 600;
  color: var(--text-white);
}

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

.node-speed-bar {
  width: 100%;
  max-width: 120px;
  height: 6px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.1);
  overflow: hidden;
  display: inline-block;
  vertical-align: middle;
  margin-right: 8px;
}

.speed-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
  border-radius: var(--radius-full);
}

.latency-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-family: var(--font-mono);
  font-weight: 700;
}

.latency-green {
  background: rgba(16, 185, 129, 0.15);
  color: #34D399;
  border: 1px solid rgba(16, 185, 129, 0.3);
}

/* ==========================================================================
   客户端生态系统支持
   ========================================================================== */
.clients-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.client-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 24px;
  text-align: center;
  transition: all var(--transition-fast);
}

.client-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-primary);
  box-shadow: 0 10px 25px rgba(0, 240, 255, 0.15);
}

.client-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 14px;
  color: var(--color-primary);
}

.client-name {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: 6px;
}

.client-platforms {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ==========================================================================
   文章专栏评测列表 (SEO & 内链枢纽)
   ========================================================================== */
.articles-section {
  background: rgba(9, 14, 29, 0.5);
  border-top: 1px solid var(--border-light);
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 40px;
}

.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 26px;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-normal);
  text-decoration: none;
}

.article-card:hover {
  transform: translateY(-5px);
  border-color: var(--color-primary);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.4);
}

.article-tag {
  display: inline-block;
  align-self: flex-start;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  background: rgba(0, 240, 255, 0.1);
  color: var(--color-primary);
  margin-bottom: 12px;
}

.article-card-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-white);
  line-height: 1.4;
  margin-bottom: 10px;
  transition: color var(--transition-fast);
}

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

.article-card-desc {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 20px;
  flex-grow: 1;
}

.article-card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-dim);
  padding-top: 14px;
  border-top: 1px solid var(--border-light);
}

.read-more-link {
  color: var(--color-primary);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

/* ==========================================================================
   真实用户评价 (用户评价)
   ========================================================================== */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 28px;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-fast);
}

.review-card:hover {
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-3px);
}

.review-stars {
  color: #FBBF24;
  font-size: 1rem;
  margin-bottom: 14px;
}

.review-content {
  font-size: 0.925rem;
  color: var(--text-main);
  line-height: 1.65;
  margin-bottom: 20px;
  flex-grow: 1;
}

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

.review-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.1rem;
  color: #040711;
}

.review-author-name {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-white);
}

.review-author-role {
  font-size: 0.775rem;
  color: var(--text-muted);
}

/* ==========================================================================
   常见问题 FAQ (Schema FAQPage 适配)
   ========================================================================== */
.faq-container {
  max-width: 860px;
  margin: 0 auto;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  margin-bottom: 14px;
  overflow: hidden;
  transition: border-color var(--transition-fast);
}

.faq-item:hover {
  border-color: rgba(0, 240, 255, 0.3);
}

.faq-question {
  width: 100%;
  padding: 20px 24px;
  text-align: left;
  background: none;
  border: none;
  font-family: var(--font-sans);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-white);
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
}

.faq-toggle-icon {
  width: 20px;
  height: 20px;
  color: var(--color-primary);
  transition: transform var(--transition-fast);
  flex-shrink: 0;
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease-out;
  padding: 0 24px;
}

.faq-item.active .faq-answer {
  max-height: 600px;
  padding: 0 24px 22px;
}

.faq-answer p {
  font-size: 0.925rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ==========================================================================
   权威外部链接与开源生态导航 (外链规范)
   ========================================================================== */
.outbound-links-section {
  padding: 40px 0;
  border-top: 1px solid var(--border-light);
  background: rgba(4, 7, 17, 0.4);
}

.outbound-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  margin-top: 18px;
}

.outbound-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-light);
  color: var(--text-muted);
  font-size: 0.85rem;
  text-decoration: none;
  transition: all var(--transition-fast);
}

.outbound-pill:hover {
  background: rgba(0, 240, 255, 0.08);
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* ==========================================================================
   底部 CTA 横幅
   ========================================================================== */
.bottom-cta-box {
  background: linear-gradient(135deg, rgba(0, 240, 255, 0.15) 0%, rgba(139, 92, 246, 0.15) 100%);
  border: 1px solid rgba(0, 240, 255, 0.3);
  border-radius: var(--radius-xl);
  padding: 50px 40px;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
  margin-bottom: 70px;
}

.bottom-cta-title {
  font-size: clamp(1.8rem, 3.5vw, 2.4rem);
  font-weight: 800;
  color: var(--text-white);
  margin-bottom: 16px;
}

.bottom-cta-desc {
  max-width: 680px;
  margin: 0 auto 30px;
  font-size: 1.05rem;
  color: var(--text-muted);
}

/* ==========================================================================
   页脚规范
   ========================================================================== */
.site-footer {
  background: #02050D;
  border-top: 1px solid var(--border-light);
  padding: 60px 0 30px;
  font-size: 0.875rem;
}

.footer-top-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: 40px;
  margin-bottom: 50px;
}

.footer-brand-desc {
  color: var(--text-muted);
  font-size: 0.875rem;
  line-height: 1.6;
  margin-top: 14px;
  max-width: 320px;
}

.footer-col-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: 18px;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 10px;
}

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

.footer-links a:hover {
  color: var(--color-primary);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 24px;
  border-top: 1px solid var(--border-light);
  color: var(--text-dim);
  font-size: 0.8rem;
  flex-wrap: wrap;
  gap: 12px;
}

/* 浮动固定呼吁按钮 (移动端极速转化) */
.mobile-sticky-bar {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  background: rgba(4, 7, 17, 0.95);
  backdrop-filter: blur(12px);
  padding: 12px 20px;
  border-top: 1px solid rgba(0, 240, 255, 0.2);
  z-index: 99;
}

/* 汉堡菜单按钮 (原生轻量) */
.mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-white);
  cursor: pointer;
  padding: 8px;
}

/* ==========================================================================
   响应式断点适配
   ========================================================================== */
@media (max-width: 1100px) {
  .pricing-grid-same-row {
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
  }
  .pricing-card.featured {
    transform: none;
  }
  .pricing-card.featured:hover {
    transform: translateY(-6px);
  }
  .features-grid,
  .articles-grid,
  .reviews-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .clients-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .hero-stats-row {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }
  .footer-top-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    display: none;
    position: absolute;
    top: 74px;
    left: 0;
    width: 100%;
    background: rgba(4, 7, 17, 0.98);
    flex-direction: column;
    padding: 24px;
    border-bottom: 1px solid var(--border-light);
  }
  .nav-menu.open {
    display: flex;
  }
  .mobile-toggle {
    display: block;
  }
  .nav-actions {
    display: none;
  }
  .mobile-sticky-bar {
    display: block;
  }
  body {
    padding-bottom: 70px;
  }
  .pricing-grid-same-row {
    grid-template-columns: 1fr;
    max-width: 440px;
    margin: 0 auto;
  }
  .features-grid,
  .articles-grid,
  .reviews-grid,
  .clients-grid {
    grid-template-columns: 1fr;
  }
  .hero-stats-row {
    grid-template-columns: 1fr 1fr;
  }
  .footer-top-grid {
    grid-template-columns: 1fr;
  }
  .hero-section {
    padding: 40px 0 40px;
  }
  .hero-cta-group {
    flex-direction: column;
    gap: 12px;
  }
  .hero-cta-group .btn {
    width: 100%;
  }
  .nodes-table-wrapper {
    overflow-x: auto;
  }
}