/* ===================================================================
   一元机场官网 (yiyuanjic.mom) - 全局浅色系科技美学样式表
   Clean, Elegant, Responsive Light Mode with Dynamic Accents
   =================================================================== */

:root {
  --primary: #2563eb;         /* 活力科技蓝 */
  --primary-hover: #1d4ed8;
  --primary-light: #eff6ff;
  --primary-glow: rgba(37, 99, 235, 0.25);
  
  --secondary: #6366f1;       /* 优雅靛紫 */
  --secondary-light: #eef2ff;
  
  --accent: #06b6d4;          /* 青色高光 */
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;

  --bg-main: #f8fafc;         /* 整体浅色背景 */
  --bg-card: #ffffff;
  --bg-card-hover: #ffffff;
  --bg-glass: rgba(255, 255, 255, 0.85);

  --text-main: #0f172a;       /* 浓郁深蓝黑标题 */
  --text-muted: #475569;      /* 次级灰色正文 */
  --text-light: #94a3b8;      /* 辅助弱色 */

  --border-color: #e2e8f0;
  --border-hover: #cbd5e1;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05), 0 1px 2px rgba(0, 0, 0, 0.03);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 25px -3px rgba(15, 23, 42, 0.08), 0 4px 10px -4px rgba(15, 23, 42, 0.04);
  --shadow-xl: 0 20px 30px -10px rgba(37, 99, 235, 0.15);

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-family);
  background-color: var(--bg-main);
  color: var(--text-main);
  line-height: 1.65;
  overflow-x: hidden;
  position: relative;
  -webkit-font-smoothing: antialiased;
}

/* 页面背景装饰与动态点缀 */
.site-bg-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: -1;
  pointer-events: none;
  background-image: url('../images/hero-bg.svg');
  background-size: cover;
  background-position: center center;
  background-repeat: no-repeat;
  opacity: 0.85;
}

.ambient-light-1 {
  position: fixed;
  top: -150px;
  left: -150px;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.18) 0%, rgba(239, 246, 255, 0) 70%);
  border-radius: 50%;
  filter: blur(80px);
  z-index: -1;
  animation: floatOrb 18s ease-in-out infinite alternate;
}

.ambient-light-2 {
  position: fixed;
  top: 30%;
  right: -200px;
  width: 650px;
  height: 650px;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.15) 0%, rgba(6, 182, 212, 0.05) 50%, rgba(255, 255, 255, 0) 75%);
  border-radius: 50%;
  filter: blur(90px);
  z-index: -1;
  animation: floatOrb2 22s ease-in-out infinite alternate;
}

.ambient-light-3 {
  position: fixed;
  bottom: -150px;
  left: 20%;
  width: 550px;
  height: 550px;
  background: radial-gradient(circle, rgba(14, 165, 233, 0.12) 0%, rgba(255, 255, 255, 0) 70%);
  border-radius: 50%;
  filter: blur(75px);
  z-index: -1;
  animation: floatOrb3 15s ease-in-out infinite alternate;
}

@keyframes floatOrb {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(60px, 80px) scale(1.1); }
  100% { transform: translate(20px, 40px) scale(0.95); }
}
@keyframes floatOrb2 {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(-80px, -50px) scale(1.08); }
  100% { transform: translate(-30px, 60px) scale(0.92); }
}
@keyframes floatOrb3 {
  0% { transform: translate(0, 0) scale(0.95); }
  50% { transform: translate(40px, -60px) scale(1.05); }
  100% { transform: translate(-20px, -20px) scale(1); }
}

/* 容器定义 */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* 排版与公用类 */
a {
  color: var(--primary);
  text-decoration: none;
  transition: all 0.25s ease;
}
a:hover {
  color: var(--primary-hover);
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  font-size: 0.825rem;
  font-weight: 600;
  border-radius: var(--radius-full);
}
.badge-primary {
  background-color: var(--primary-light);
  color: var(--primary);
  border: 1px solid rgba(37, 99, 235, 0.2);
}
.badge-success {
  background-color: #ecfdf5;
  color: var(--success);
  border: 1px solid rgba(16, 185, 129, 0.2);
}

.pulse-dot {
  width: 8px;
  height: 8px;
  background-color: var(--success);
  border-radius: 50%;
  box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
  animation: pulseAnimation 2s infinite;
}
@keyframes pulseAnimation {
  0% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
  70% { box-shadow: 0 0 0 8px rgba(16, 185, 129, 0); }
  100% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

/* 按钮规范 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 600;
  font-size: 0.975rem;
  padding: 12px 24px;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  white-space: nowrap;
}
.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.35);
}
.btn-primary:hover {
  background: linear-gradient(135deg, var(--primary-hover) 0%, #4f46e5 100%);
  color: #ffffff;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.45);
}
.btn-outline {
  background: #ffffff;
  color: var(--text-main);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
}
.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: var(--primary-light);
  transform: translateY(-2px);
}
.btn-sm {
  padding: 8px 16px;
  font-size: 0.875rem;
  border-radius: var(--radius-sm);
}
.btn-lg {
  padding: 15px 32px;
  font-size: 1.1rem;
  border-radius: var(--radius-md);
}

/* 导航栏 Header */
.site-header {
  position: sticky;
  top: 0;
  width: 100%;
  background-color: var(--bg-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(226, 232, 240, 0.8);
  z-index: 1000;
  transition: all 0.3s ease;
}
.nav-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: -0.5px;
}
.logo-icon {
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, #2563eb, #6366f1);
  color: white;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 10px rgba(37, 99, 235, 0.3);
}
.logo-tag {
  font-size: 0.75rem;
  padding: 2px 6px;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: 4px;
  font-weight: 600;
  margin-left: 4px;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}
.nav-link {
  color: var(--text-muted);
  font-size: 0.95rem;
  font-weight: 500;
  position: relative;
  padding: 6px 0;
}
.nav-link:hover, .nav-link.active {
  color: var(--primary);
}
.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background: var(--primary);
  transition: width 0.25s ease;
  border-radius: 2px;
}
.nav-link:hover::after {
  width: 100%;
}
.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  color: var(--text-main);
}

/* Hero 首屏 */
.hero-section {
  padding: 90px 0 70px;
  position: relative;
  text-align: center;
}
.hero-badge-wrap {
  margin-bottom: 24px;
  display: inline-block;
}
.hero-title {
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -1.5px;
  color: var(--text-main);
  margin-bottom: 24px;
}
.hero-title .gradient-text {
  background: linear-gradient(135deg, #1d4ed8 0%, #6366f1 50%, #06b6d4 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero-desc {
  max-width: 760px;
  margin: 0 auto 36px;
  font-size: 1.25rem;
  color: var(--text-muted);
  line-height: 1.7;
}
.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 48px;
}
.hero-guarantee {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  color: var(--text-light);
  font-size: 0.875rem;
}
.guarantee-item {
  display: flex;
  align-items: center;
  gap: 6px;
}
.guarantee-item svg {
  color: var(--success);
}

/* 动态仪表板/状态卡片 */
.hero-preview {
  margin-top: 50px;
  position: relative;
  max-width: 960px;
  margin-left: auto;
  margin-right: auto;
  background: #ffffff;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-xl);
  overflow: hidden;
  padding: 24px;
}
.hero-preview-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 16px;
  margin-bottom: 20px;
}
.topbar-dots {
  display: flex;
  gap: 6px;
}
.topbar-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}
.topbar-dot.red { background: #ff5f56; }
.topbar-dot.yellow { background: #ffbd2e; }
.topbar-dot.green { background: #27c93f; }
.topbar-title {
  font-size: 0.85rem;
  color: var(--text-light);
  font-weight: 500;
}
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.metric-box {
  background: var(--bg-main);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 18px 16px;
  text-align: left;
  transition: all 0.25s ease;
}
.metric-box:hover {
  transform: translateY(-3px);
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
}
.metric-box .label {
  font-size: 0.825rem;
  color: var(--text-muted);
  margin-bottom: 6px;
}
.metric-box .value {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--primary);
  font-family: inherit;
}
.metric-box .status-text {
  font-size: 0.775rem;
  color: var(--success);
  margin-top: 4px;
  display: flex;
  align-items: center;
  gap: 4px;
}

/* 通用Section结构 */
.section {
  padding: 100px 0;
  position: relative;
}
.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 60px;
}
.section-subtitle {
  color: var(--primary);
  font-weight: 700;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 12px;
}
.section-title {
  font-size: 2.4rem;
  font-weight: 800;
  letter-spacing: -0.8px;
  color: var(--text-main);
  margin-bottom: 16px;
  line-height: 1.3;
}
.section-desc {
  font-size: 1.1rem;
  color: var(--text-muted);
}

/* 核心优势卡片网格 */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
  overflow: hidden;
}
.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  opacity: 0;
  transition: opacity 0.3s ease;
}
.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(37, 99, 235, 0.3);
}
.feature-card:hover::before {
  opacity: 1;
}
.feature-icon-wrapper {
  width: 58px;
  height: 58px;
  border-radius: var(--radius-md);
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 22px;
  font-size: 1.6rem;
  transition: all 0.3s ease;
}
.feature-card:hover .feature-icon-wrapper {
  background: var(--primary);
  color: #ffffff;
  transform: scale(1.08) rotate(3deg);
}
.feature-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-main);
}
.feature-text {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.65;
}

/* 套餐价格板块 */
.pricing-section {
  background: linear-gradient(180deg, rgba(248, 250, 252, 0) 0%, rgba(238, 242, 255, 0.6) 100%);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}
.pricing-toggle-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-bottom: 48px;
}
.pricing-toggle-btn {
  background: #ffffff;
  border: 1px solid var(--border-color);
  padding: 6px 18px;
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.2s ease;
}
.pricing-toggle-btn.active {
  background: var(--primary);
  color: #ffffff;
  border-color: var(--primary);
  box-shadow: 0 4px 10px rgba(37, 99, 235, 0.25);
}
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  align-items: stretch;
}
.pricing-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px 26px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all 0.3s ease;
}
.pricing-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
  border-color: var(--primary);
}
.pricing-card.featured {
  border: 2px solid var(--primary);
  box-shadow: var(--shadow-lg);
  background: linear-gradient(180deg, #ffffff 0%, #f8faff 100%);
}
.featured-ribbon {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, #f59e0b, #ef4444);
  color: #ffffff;
  font-size: 0.775rem;
  font-weight: 700;
  padding: 4px 16px;
  border-radius: var(--radius-full);
  letter-spacing: 0.5px;
  box-shadow: 0 4px 10px rgba(239, 68, 68, 0.3);
}
.pricing-header {
  margin-bottom: 24px;
  text-align: center;
}
.plan-name {
  font-size: 1.35rem;
  font-weight: 800;
  margin-bottom: 8px;
  color: var(--text-main);
}
.plan-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  min-height: 40px;
}
.plan-price-wrap {
  margin: 18px 0;
  display: flex;
  align-items: baseline;
  justify-content: center;
}
.currency {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary);
}
.amount {
  font-size: 3.2rem;
  font-weight: 900;
  line-height: 1;
  color: var(--primary);
  letter-spacing: -1px;
}
.period {
  font-size: 0.9rem;
  color: var(--text-light);
  margin-left: 4px;
}
.pricing-features {
  list-style: none;
  margin-bottom: 32px;
  flex-grow: 1;
}
.pricing-features li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 12px;
}
.pricing-features li svg {
  color: var(--success);
  flex-shrink: 0;
}
.pricing-card .btn {
  width: 100%;
}

/* 客户端生态板块 */
.clients-section {
  padding: 80px 0;
}
.clients-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 16px;
}
.client-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px 16px;
  text-align: center;
  transition: all 0.25s ease;
}
.client-card:hover {
  transform: translateY(-4px);
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
}
.client-icon {
  font-size: 2.2rem;
  margin-bottom: 12px;
  color: var(--primary);
}
.client-name {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 4px;
  color: var(--text-main);
}
.client-sub {
  font-size: 0.775rem;
  color: var(--text-light);
}

/* 用户评价板块 */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.review-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all 0.3s ease;
}
.review-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(99, 102, 241, 0.3);
}
.review-stars {
  color: #f59e0b;
  margin-bottom: 14px;
  font-size: 1rem;
  letter-spacing: 2px;
}
.review-text {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 20px;
  font-style: italic;
}
.reviewer-info {
  display: flex;
  align-items: center;
  gap: 12px;
}
.reviewer-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: var(--primary);
  font-size: 1.1rem;
}
.reviewer-name {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text-main);
}
.reviewer-role {
  font-size: 0.8rem;
  color: var(--text-light);
}

/* 常见问题 FAQ 手风琴 */
.faq-section {
  background: #ffffff;
}
.faq-container {
  max-width: 860px;
  margin: 0 auto;
}
.faq-item {
  border-bottom: 1px solid var(--border-color);
  padding: 20px 0;
}
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  background: none;
  border: none;
  text-align: left;
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text-main);
  cursor: pointer;
  padding: 6px 0;
  transition: color 0.2s ease;
}
.faq-question:hover {
  color: var(--primary);
}
.faq-icon {
  width: 24px;
  height: 24px;
  transition: transform 0.3s ease;
  color: var(--text-light);
  flex-shrink: 0;
}
.faq-item.active .faq-icon {
  transform: rotate(180deg);
  color: var(--primary);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
}
.faq-item.active .faq-answer {
  max-height: 500px;
  padding-top: 14px;
}

/* 知识库与教程板块 (12篇文章卡片网格) */
.articles-section {
  padding: 100px 0;
}
.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.article-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: all 0.3s ease;
  text-decoration: none;
}
.article-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-xl);
  border-color: var(--primary);
}
.article-thumb {
  height: 170px;
  background: linear-gradient(135deg, #eff6ff 0%, #e0e7ff 100%);
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  overflow: hidden;
}
.article-thumb-pattern {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0.15;
  background-image: radial-gradient(#2563eb 1px, transparent 1px);
  background-size: 16px 16px;
}
.article-thumb-icon {
  font-size: 3rem;
  color: var(--primary);
  z-index: 1;
  transition: transform 0.3s ease;
}
.article-card:hover .article-thumb-icon {
  transform: scale(1.15);
}
.article-tag {
  position: absolute;
  top: 14px;
  left: 14px;
  background: #ffffff;
  color: var(--primary);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-sm);
  z-index: 2;
}
.article-content {
  padding: 24px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}
.article-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.8rem;
  color: var(--text-light);
  margin-bottom: 12px;
}
.article-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.45;
  margin-bottom: 10px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  transition: color 0.2s ease;
}
.article-card:hover .article-title {
  color: var(--primary);
}
.article-excerpt {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 18px;
  flex-grow: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.article-readmore {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--primary);
}
.article-card:hover .article-readmore svg {
  transform: translateX(4px);
}
.article-readmore svg {
  transition: transform 0.2s ease;
}

/* 转化引导Banner (CTA Banner) */
.cta-banner {
  background: linear-gradient(135deg, #1e3a8a 0%, #2563eb 50%, #4f46e5 100%);
  border-radius: var(--radius-lg);
  padding: 60px 40px;
  color: #ffffff;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-xl);
  margin-bottom: 60px;
}
.cta-banner::before {
  content: '';
  position: absolute;
  top: -100px;
  right: -100px;
  width: 300px;
  height: 300px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  pointer-events: none;
}
.cta-banner-title {
  font-size: 2.2rem;
  font-weight: 800;
  margin-bottom: 16px;
}
.cta-banner-desc {
  font-size: 1.1rem;
  opacity: 0.9;
  max-width: 600px;
  margin: 0 auto 32px;
}
.btn-cta-gold {
  background: linear-gradient(135deg, #fbbf24 0%, #f59e0b 100%);
  color: #78350f;
  font-weight: 700;
  box-shadow: 0 6px 20px rgba(245, 158, 11, 0.4);
}
.btn-cta-gold:hover {
  background: #f59e0b;
  color: #451a03;
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(245, 158, 11, 0.6);
}

/* 页脚 Footer */
.site-footer {
  background: #ffffff;
  border-top: 1px solid var(--border-color);
  padding: 70px 0 30px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 40px;
  margin-bottom: 50px;
}
.footer-brand p {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-top: 14px;
  line-height: 1.6;
}
.footer-heading {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 20px;
}
.footer-links {
  list-style: none;
}
.footer-links li {
  margin-bottom: 10px;
}
.footer-links a {
  color: var(--text-muted);
  font-size: 0.9rem;
}
.footer-links a:hover {
  color: var(--primary);
  padding-left: 4px;
}
.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding-top: 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--text-light);
}
.footer-meta-links {
  display: flex;
  gap: 20px;
}
.footer-meta-links a {
  color: var(--text-light);
}
.footer-meta-links a:hover {
  color: var(--primary);
}

/* ===================================================================
   文章内页专用排版样式 (Article Single Page Layout)
   =================================================================== */
.article-header-section {
  padding: 50px 0 30px;
  background: linear-gradient(180deg, #eff6ff 0%, #f8fafc 100%);
  border-bottom: 1px solid var(--border-color);
}
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.875rem;
  color: var(--text-light);
  margin-bottom: 20px;
}
.breadcrumb a {
  color: var(--text-muted);
}
.breadcrumb a:hover {
  color: var(--primary);
}
.article-page-title {
  font-size: 2.3rem;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1.3;
  margin-bottom: 20px;
}
.article-header-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 20px;
  font-size: 0.875rem;
  color: var(--text-muted);
}
.article-layout {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 40px;
  padding: 50px 0 80px;
}
.article-main-body {
  background: #ffffff;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  padding: 40px;
  box-shadow: var(--shadow-sm);
  line-height: 1.8;
  font-size: 1.05rem;
  color: #334155;
}
.article-main-body h2 {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-main);
  margin: 36px 0 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--primary-light);
  display: flex;
  align-items: center;
  gap: 10px;
}
.article-main-body h2::before {
  content: '';
  display: inline-block;
  width: 4px;
  height: 1.2em;
  background: var(--primary);
  border-radius: 2px;
}
.article-main-body h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-main);
  margin: 24px 0 12px;
}
.article-main-body p {
  margin-bottom: 20px;
}
.article-main-body ul, .article-main-body ol {
  margin-bottom: 24px;
  padding-left: 24px;
}
.article-main-body li {
  margin-bottom: 8px;
}
.article-main-body blockquote {
  border-left: 4px solid var(--primary);
  background: var(--primary-light);
  padding: 16px 20px;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin: 24px 0;
  color: #1e40af;
  font-weight: 500;
}
.article-main-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  font-size: 0.95rem;
}
.article-main-body th, .article-main-body td {
  border: 1px solid var(--border-color);
  padding: 12px 16px;
  text-align: left;
}
.article-main-body th {
  background: var(--bg-main);
  font-weight: 700;
  color: var(--text-main);
}
.article-main-body tr:nth-child(even) {
  background: #fdfdfe;
}
.article-inline-cta {
  background: linear-gradient(135deg, #eff6ff 0%, #e0e7ff 100%);
  border: 1px dashed var(--primary);
  border-radius: var(--radius-md);
  padding: 24px;
  margin: 32px 0;
  text-align: center;
}
.article-sidebar {
  display: flex;
  flex-direction: column;
  gap: 28px;
}
.sidebar-widget {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-sm);
}
.sidebar-widget-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  gap: 8px;
}
.sidebar-promo-card {
  background: linear-gradient(135deg, #2563eb 0%, #6366f1 100%);
  color: #ffffff;
  text-align: center;
  padding: 28px 20px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}
.sidebar-promo-price {
  font-size: 2.2rem;
  font-weight: 900;
  margin: 12px 0 20px;
}
.sidebar-article-list {
  list-style: none;
}
.sidebar-article-item {
  margin-bottom: 14px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border-color);
}
.sidebar-article-item:last-child {
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: none;
}
.sidebar-article-link {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-main);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  line-height: 1.45;
}
.sidebar-article-link:hover {
  color: var(--primary);
}

/* 响应式断点适配 */
@media (max-width: 1024px) {
  .hero-title {
    font-size: 2.8rem;
  }
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .clients-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .articles-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .article-layout {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .hero-title {
    font-size: 2.1rem;
  }
  .hero-desc {
    font-size: 1.05rem;
  }
  .metrics-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .features-grid {
    grid-template-columns: 1fr;
  }
  .pricing-grid {
    grid-template-columns: 1fr;
  }
  .reviews-grid {
    grid-template-columns: 1fr;
  }
  .articles-grid {
    grid-template-columns: 1fr;
  }
  .clients-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .nav-menu {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    width: 100%;
    background: #ffffff;
    flex-direction: column;
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-lg);
  }
  .nav-menu.show {
    display: flex;
  }
  .mobile-toggle {
    display: block;
  }
  .article-main-body {
    padding: 24px 18px;
  }
  .article-page-title {
    font-size: 1.7rem;
  }
  .footer-bottom {
    flex-direction: column;
    gap: 14px;
    text-align: center;
  }
}