/* ==========================================================================
   快冲云网 (kuaichongyun.mom) 官方落地页原生样式表
   规范：纯原生 CSS，零重型第三方库，保证毫秒级秒开与最佳 SEO 性能体验
   ========================================================================== */

:root {
  --bg-primary: #060b14;
  --bg-secondary: #0b1322;
  --bg-card: rgba(13, 23, 42, 0.78);
  --bg-card-hover: rgba(18, 32, 59, 0.92);
  --bg-card-featured: rgba(0, 242, 254, 0.07);
  --border-color: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(56, 189, 248, 0.4);
  --border-featured: rgba(0, 242, 254, 0.5);
  
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  
  --primary-start: #00f2fe;
  --primary-end: #38bdf8;
  --accent-cyan: #00f2fe;
  --accent-blue: #3b82f6;
  --accent-amber: #fbbf24;
  --accent-emerald: #10b981;
  --accent-rose: #f43f5e;
  
  --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, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  
  --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 10px 25px -5px rgba(0, 0, 0, 0.45);
  --shadow-glow: 0 0 25px rgba(0, 242, 254, 0.22);
  --shadow-featured: 0 0 35px rgba(0, 242, 254, 0.35);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.65;
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
}

/* ==========================================================================
   全屏动态画布背景 (Cyber Energy Particle Lightning Grid)
   ========================================================================== */
.dynamic-bg-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

#dynamic-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: block;
}

/* ==========================================================================
   全屏动态宇宙背景与 3D 极速巡航飞船系统 (Cosmic Warp Spaceship Station)
   ========================================================================== */
.bg-spaceship-station {
  position: absolute;
  bottom: 20px;
  right: 25px;
  width: 330px;
  height: 250px;
  z-index: 2;
  pointer-events: auto;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-end;
  transition: transform 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.bg-spaceship-station:hover {
  transform: translateY(-8px) scale(1.04);
}

/* 宇宙离子等离子推进器与曲率光晕 */
.spaceship-glow-halo {
  position: absolute;
  bottom: 20px;
  right: 15px;
  width: 300px;
  height: 180px;
  border-radius: 50%;
  background: radial-gradient(ellipse at center, rgba(0, 242, 254, 0.35) 0%, rgba(59, 130, 246, 0.2) 45%, rgba(139, 92, 246, 0.1) 65%, transparent 75%);
  filter: blur(28px);
  animation: spaceshipHaloBreathe 4s ease-in-out infinite alternate;
  z-index: 1;
  pointer-events: none;
}

@keyframes spaceshipHaloBreathe {
  0% { transform: scale(0.9); opacity: 0.65; }
  100% { transform: scale(1.15); opacity: 0.95; }
}

/* 宇宙飞船浮空与姿态平衡动画 */
.spaceship-wrapper {
  position: relative;
  width: 320px;
  height: 220px;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: spaceshipHoverCruise 5.2s ease-in-out infinite;
  transform-origin: center center;
}

.spaceship-img {
  width: 100%;
  height: auto;
  object-fit: contain;
  filter: drop-shadow(0 15px 30px rgba(0, 0, 0, 0.8)) drop-shadow(0 0 25px rgba(0, 242, 254, 0.45));
  user-select: none;
  -webkit-user-drag: none;
  transition: filter 0.3s ease;
}

.bg-spaceship-station:hover .spaceship-img {
  filter: drop-shadow(0 20px 40px rgba(0, 0, 0, 0.95)) drop-shadow(0 0 35px rgba(56, 189, 248, 0.7));
}

@keyframes spaceshipHoverCruise {
  0%, 100% {
    transform: translateY(0) rotate(-2deg);
  }
  25% {
    transform: translateY(-8px) rotate(1deg);
  }
  50% {
    transform: translateY(-14px) rotate(-1deg);
  }
  75% {
    transform: translateY(-6px) rotate(-3deg);
  }
}

/* 宇宙船点击曲率超光速跃迁动效 */
.spaceship-wrapper.warp-boost {
  animation: spaceshipWarpBoost 0.85s cubic-bezier(0.25, 1, 0.5, 1) !important;
}

@keyframes spaceshipWarpBoost {
  0% { transform: translateY(0) scale(1) rotate(-2deg); }
  25% { transform: translateY(4px) scale(0.92) rotate(-5deg); }
  50% { transform: translateY(-40px) scale(1.18) rotate(3deg); filter: brightness(1.6); }
  75% { transform: translateY(-10px) scale(1.05) rotate(0deg); }
  100% { transform: translateY(0) scale(1) rotate(-2deg); }
}

/* 飞船状态对话气泡 */
.spaceship-bubble {
  position: absolute;
  top: 0;
  background: rgba(6, 15, 30, 0.92);
  border: 1px solid rgba(0, 242, 254, 0.55);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  color: var(--accent-cyan);
  font-size: 12.5px;
  font-weight: 700;
  padding: 5px 14px;
  border-radius: var(--radius-full);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.6), 0 0 16px rgba(0, 242, 254, 0.3);
  animation: bubbleFloat 3.8s ease-in-out infinite;
  white-space: nowrap;
  z-index: 4;
}

.spaceship-bubble::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 0;
  border-left: 6px solid transparent;
  border-right: 6px solid transparent;
  border-top: 6px solid rgba(6, 15, 30, 0.92);
}

@keyframes bubbleFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}

/* 宇宙飞船浮空响应式适配 */
@media (max-width: 992px) {
  .bg-spaceship-station {
    width: 250px;
    height: 190px;
    right: 15px;
    bottom: 12px;
  }
  .spaceship-wrapper {
    width: 240px;
    height: 170px;
  }
}

@media (max-width: 768px) {
  .bg-spaceship-station {
    width: 190px;
    height: 150px;
    right: 10px;
    bottom: 8px;
    opacity: 0.92;
  }
  .spaceship-wrapper {
    width: 180px;
    height: 130px;
  }
  .spaceship-bubble {
    font-size: 11px;
    padding: 3px 10px;
  }
}

@media (max-width: 480px) {
  .bg-spaceship-station {
    width: 140px;
    height: 110px;
    right: 5px;
    bottom: 5px;
    opacity: 0.85;
  }
  .spaceship-wrapper {
    width: 130px;
    height: 95px;
  }
  .spaceship-bubble {
    display: none;
  }
}

.site-wrapper {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

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

/* ==========================================================================
   顶部固定导航栏 (Header & Brand Logo)
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(6, 11, 20, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
  transition: all 0.3s ease;
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.nav-brand {
  display: flex;
  align-items: center;
  text-decoration: none;
  gap: 10px;
}

.nav-brand img {
  height: 44px;
  width: auto;
  display: block;
}

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

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 15px;
  font-weight: 500;
  transition: color 0.2s ease;
  position: relative;
}

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

.nav-link::after {
  content: "";
  position: absolute;
  bottom: -6px;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-cyan), var(--accent-blue));
  transition: width 0.3s ease;
}

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

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

/* ==========================================================================
   通用按钮规范 (严格满足 rel="nofollow" target="_blank")
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: inherit;
  font-size: 15px;
  font-weight: 600;
  padding: 10px 22px;
  border-radius: var(--radius-full);
  text-decoration: none;
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  border: 1px solid transparent;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-cyan) 0%, #0284c7 100%);
  color: #030816;
  font-weight: 700;
  box-shadow: 0 4px 18px rgba(0, 242, 254, 0.35);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #38bdf8 0%, #0369a1 100%);
  box-shadow: 0 6px 24px rgba(0, 242, 254, 0.5);
  transform: translateY(-2px);
  color: #000;
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--border-color);
  color: var(--text-primary);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
  transform: translateY(-2px);
}

.btn-amber {
  background: linear-gradient(135deg, #fbbf24 0%, #d97706 100%);
  color: #000000;
  font-weight: 700;
  box-shadow: 0 4px 18px rgba(251, 191, 36, 0.35);
}

.btn-amber:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(251, 191, 36, 0.5);
}

.btn-block {
  width: 100%;
}

.btn-sm {
  padding: 6px 14px;
  font-size: 13.5px;
}

/* ==========================================================================
   Hero 头部首屏区
   ========================================================================== */
.hero-section {
  padding: 85px 0 60px;
  text-align: center;
  position: relative;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: rgba(0, 242, 254, 0.08);
  border: 1px solid rgba(0, 242, 254, 0.25);
  padding: 6px 18px;
  border-radius: var(--radius-full);
  margin-bottom: 24px;
  font-size: 13.5px;
  color: var(--accent-cyan);
  font-weight: 600;
  box-shadow: 0 0 15px rgba(0, 242, 254, 0.15);
}

.hero-pill-dot {
  width: 8px;
  height: 8px;
  background: #10b981;
  border-radius: 50%;
  box-shadow: 0 0 8px #10b981;
  animation: pulseDot 2s infinite ease-in-out;
}

@keyframes pulseDot {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.4); opacity: 0.6; }
}

.hero-title {
  font-size: clamp(34px, 5.5vw, 56px);
  font-weight: 900;
  line-height: 1.18;
  letter-spacing: -0.5px;
  margin-bottom: 22px;
}

.hero-title .text-gradient {
  background: linear-gradient(135deg, #ffffff 0%, #38bdf8 50%, #00f2fe 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-title .text-highlight {
  background: linear-gradient(135deg, #fbbf24 0%, #f59e0b 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-desc {
  font-size: clamp(16px, 2vw, 19px);
  color: var(--text-secondary);
  max-width: 860px;
  margin: 0 auto 36px;
  line-height: 1.7;
}

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

.hero-stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  max-width: 980px;
  margin: 0 auto;
}

.hero-stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 18px 14px;
  backdrop-filter: blur(10px);
  text-align: center;
}

.hero-stat-val {
  font-size: 26px;
  font-weight: 800;
  color: var(--accent-cyan);
  font-family: var(--font-mono);
  margin-bottom: 4px;
}

.hero-stat-label {
  font-size: 13px;
  color: var(--text-secondary);
}

/* ==========================================================================
   板块公用样式
   ========================================================================== */
.section {
  padding: 75px 0;
  position: relative;
}

.section-alt {
  background: rgba(11, 19, 34, 0.45);
}

.section-header {
  text-align: center;
  margin-bottom: 48px;
}

.section-tag {
  display: inline-block;
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--accent-cyan);
  background: rgba(0, 242, 254, 0.1);
  padding: 4px 14px;
  border-radius: var(--radius-full);
  margin-bottom: 12px;
}

.section-title {
  font-size: clamp(26px, 3.5vw, 38px);
  font-weight: 800;
  margin-bottom: 14px;
}

.section-desc {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 680px;
  margin: 0 auto;
}

/* ==========================================================================
   价格套餐模块 (严格要求：所有价格要同排 ALL IN ONE ROW)
   ========================================================================== */
.pricing-section {
  position: relative;
}

.pricing-row-container {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 30px 22px;
  display: flex;
  flex-direction: column;
  transition: all 0.3s ease;
  position: relative;
  backdrop-filter: blur(12px);
}

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

/* 官方高亮推荐卡片 (旗舰款) */
.pricing-card.featured {
  background: linear-gradient(180deg, rgba(0, 242, 254, 0.1) 0%, rgba(13, 23, 42, 0.95) 100%);
  border: 2px solid var(--border-featured);
  box-shadow: var(--shadow-featured);
}

.pricing-card.featured:hover {
  border-color: var(--accent-cyan);
  box-shadow: 0 0 45px rgba(0, 242, 254, 0.45);
}

.plan-top-badge {
  position: absolute;
  top: -13px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, #00f2fe, #0284c7);
  color: #030816;
  font-size: 12px;
  font-weight: 800;
  padding: 3px 14px;
  border-radius: var(--radius-full);
  letter-spacing: 0.5px;
  white-space: nowrap;
  box-shadow: 0 4px 12px rgba(0, 242, 254, 0.4);
}

.plan-tier-badge {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-secondary);
  margin-bottom: 12px;
}

.pricing-card.featured .plan-tier-badge {
  color: #00f2fe;
  background: rgba(0, 242, 254, 0.15);
}

.plan-name {
  font-size: 22px;
  font-weight: 800;
  margin-bottom: 6px;
}

.plan-target {
  font-size: 13px;
  color: var(--text-secondary);
  min-height: 38px;
  line-height: 1.45;
  margin-bottom: 16px;
}

.pricing-figure {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 22px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--border-color);
}

.price-currency {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
}

.price-num {
  font-size: 42px;
  font-weight: 900;
  font-family: var(--font-mono);
  color: #ffffff;
  line-height: 1;
}

.pricing-card.featured .price-num {
  color: var(--accent-cyan);
}

.price-cycle {
  font-size: 14px;
  color: var(--text-muted);
  font-weight: 500;
}

.pricing-features {
  list-style: none;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 26px;
}

.pricing-features li {
  font-size: 13.5px;
  color: #cbd5e1;
  display: flex;
  align-items: flex-start;
  gap: 8px;
  line-height: 1.45;
}

.pricing-features li strong {
  color: #ffffff;
}

.pricing-features .check-icon {
  color: #10b981;
  font-weight: 800;
  flex-shrink: 0;
}

.pricing-card-footer {
  margin-top: auto;
}

.pricing-tip {
  text-align: center;
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 10px;
}

/* ==========================================================================
   核心优势卡片网格 (Features Grid)
   ========================================================================== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 30px;
  transition: all 0.3s ease;
  backdrop-filter: blur(10px);
}

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

.feature-icon-wrapper {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, rgba(0, 242, 254, 0.15), rgba(59, 130, 246, 0.15));
  border: 1px solid rgba(0, 242, 254, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  margin-bottom: 20px;
  color: var(--accent-cyan);
}

.feature-card h3 {
  font-size: 19px;
  font-weight: 700;
  margin-bottom: 10px;
  color: #f1f5f9;
}

.feature-card p {
  font-size: 14.5px;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* ==========================================================================
   实测测速与节点延迟矩阵 (Speed & Latency Live Matrix)
   ========================================================================== */
.speed-matrix-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  backdrop-filter: blur(10px);
}

.speed-matrix-table th,
.speed-matrix-table td {
  padding: 16px 20px;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
  font-size: 14px;
}

.speed-matrix-table th {
  background: rgba(255, 255, 255, 0.04);
  font-weight: 700;
  color: var(--accent-cyan);
}

.speed-matrix-table tr:hover td {
  background: rgba(255, 255, 255, 0.02);
}

.badge-status-green {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  background: rgba(16, 185, 129, 0.15);
  color: #34d399;
  font-size: 12.5px;
  font-weight: 600;
}

.badge-status-green::before {
  content: "";
  width: 6px;
  height: 6px;
  background: #10b981;
  border-radius: 50%;
}

/* ==========================================================================
   客户端支持矩阵 (Clients Grid)
   ========================================================================== */
.clients-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.client-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 22px;
  text-align: center;
  transition: all 0.25s ease;
}

.client-item:hover {
  border-color: var(--border-hover);
  transform: translateY(-3px);
}

.client-logo-icon {
  font-size: 32px;
  margin-bottom: 10px;
}

.client-name {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 4px;
}

.client-desc {
  font-size: 12.5px;
  color: var(--text-secondary);
}

/* ==========================================================================
   文章专栏网格与内部跳转 (Articles Grid)
   ========================================================================== */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 26px;
  display: flex;
  flex-direction: column;
  transition: all 0.3s ease;
  backdrop-filter: blur(10px);
}

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

.article-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
  font-size: 12.5px;
  color: var(--text-muted);
}

.article-tag {
  color: var(--accent-cyan);
  background: rgba(0, 242, 254, 0.1);
  padding: 2px 8px;
  border-radius: var(--radius-full);
  font-weight: 600;
}

.article-card-title {
  font-size: 17.5px;
  font-weight: 700;
  line-height: 1.45;
  margin-bottom: 12px;
}

.article-card-title a {
  color: #ffffff;
  text-decoration: none;
  transition: color 0.2s ease;
}

.article-card-title a:hover {
  color: var(--accent-cyan);
}

.article-excerpt {
  font-size: 13.5px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 20px;
  flex: 1;
}

.article-keywords-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 18px;
}

.article-kw {
  font-size: 11.5px;
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.04);
  padding: 2px 7px;
  border-radius: 4px;
}

.article-readmore {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--accent-cyan);
  text-decoration: none;
  transition: gap 0.2s ease;
}

.article-readmore:hover {
  gap: 10px;
  color: #38bdf8;
}

/* ==========================================================================
   真实用户评价板块 (User Reviews Testimonials)
   ========================================================================== */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 26px;
  display: flex;
  flex-direction: column;
  backdrop-filter: blur(10px);
  transition: all 0.25s ease;
}

.review-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-3px);
}

.review-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 14px;
}

.review-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-cyan), #0284c7);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  color: #030816;
  font-size: 16px;
}

.review-user-info {
  flex: 1;
}

.review-name {
  font-size: 15px;
  font-weight: 700;
  color: #f1f5f9;
  display: flex;
  align-items: center;
  gap: 6px;
}

.review-badge-verified {
  font-size: 11px;
  color: #10b981;
  background: rgba(16, 185, 129, 0.15);
  padding: 1px 6px;
  border-radius: var(--radius-full);
}

.review-role {
  font-size: 12.5px;
  color: var(--text-muted);
}

.review-stars {
  color: #fbbf24;
  font-size: 14px;
  margin-bottom: 12px;
  letter-spacing: 2px;
}

.review-text {
  font-size: 14px;
  color: #cbd5e1;
  line-height: 1.6;
  flex: 1;
  margin-bottom: 14px;
}

.review-date {
  font-size: 12px;
  color: var(--text-muted);
}

/* ==========================================================================
   常见问题 FAQ (Accordion & Answers)
   ========================================================================== */
.faq-container {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all 0.25s ease;
  backdrop-filter: blur(10px);
}

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

.faq-question {
  width: 100%;
  padding: 20px 24px;
  background: none;
  border: none;
  color: #ffffff;
  font-size: 16.5px;
  font-weight: 700;
  text-align: left;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  font-family: inherit;
}

.faq-icon {
  font-size: 20px;
  color: var(--accent-cyan);
  transition: transform 0.3s ease;
  flex-shrink: 0;
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
  color: var(--accent-amber);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.faq-item.active .faq-answer {
  max-height: 400px;
}

.faq-answer-inner {
  padding: 0 24px 22px;
  color: var(--text-secondary);
  font-size: 14.5px;
  line-height: 1.7;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  margin-top: 6px;
  padding-top: 16px;
}

.faq-answer-inner a {
  color: var(--accent-cyan);
  text-decoration: underline;
}

/* ==========================================================================
   权威外部链接条 (External Links & Authority Backlinks)
   ========================================================================== */
.external-links-bar {
  background: rgba(14, 25, 47, 0.5);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  padding: 28px 0;
}

.external-links-title {
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--text-muted);
  margin-bottom: 16px;
  text-align: center;
}

.external-links-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 16px 24px;
  list-style: none;
}

.external-links-list a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 13.5px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: color 0.2s ease;
}

.external-links-list a:hover {
  color: var(--accent-cyan);
}

/* ==========================================================================
   页脚区域 (Site Footer)
   ========================================================================== */
.site-footer {
  background: #040810;
  border-top: 1px solid var(--border-color);
  padding: 60px 0 30px;
  font-size: 14px;
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand p {
  color: var(--text-secondary);
  margin-top: 14px;
  line-height: 1.65;
  font-size: 13.5px;
  max-width: 320px;
}

.footer-title {
  font-size: 15px;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 16px;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.2s ease;
  font-size: 13.5px;
}

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

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 12.5px;
  color: var(--text-muted);
}

/* ==========================================================================
   响应式断点适配 (Responsive Breakpoints)
   保证在桌面端所有价格严格同排，移动端完美适配
   ========================================================================== */
@media (max-width: 1100px) {
  .pricing-row-container {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }
  
  .features-grid,
  .articles-grid,
  .reviews-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .clients-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: 72px;
    left: 0;
    width: 100%;
    background: rgba(6, 11, 20, 0.98);
    flex-direction: column;
    padding: 24px;
    gap: 18px;
    transform: translateY(-150%);
    transition: transform 0.3s ease;
    border-bottom: 1px solid var(--border-color);
  }
  
  .nav-menu.open {
    transform: translateY(0);
  }
  
  .hero-stats-row {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .pricing-row-container {
    grid-template-columns: 1fr;
    max-width: 440px;
    margin: 0 auto;
  }
  
  .features-grid,
  .articles-grid,
  .reviews-grid,
  .clients-grid {
    grid-template-columns: 1fr;
    max-width: 480px;
    margin-left: auto;
    margin-right: auto;
  }
  
  .footer-top {
    grid-template-columns: 1fr;
    gap: 30px;
  }
  
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}