/* Warm Beige Elegant Theme for superbiu云机场 (superbiu.cfd) */

:root {
  --bg-main: #f7f4ed;            /* 米色主背景 */
  --bg-card: #ffffff;            /* 纯白/浅象牙卡片背景 */
  --bg-section-alt: #f0ebe1;    /* 渐进对比米色区 */
  --bg-header: rgba(247, 244, 237, 0.92);
  
  --primary: #4338ca;            /* 深邃靛蓝 */
  --primary-hover: #3730a3;
  --primary-light: #e0e7ff;
  --accent: #d97706;             /* 琥珀暖金 */
  --accent-light: #fef3c7;
  
  --text-main: #1c1917;          /* 深暖褐灰字 */
  --text-muted: #57534e;         /* 柔和次要字 */
  --text-light: #78716c;
  
  --border-color: #e7e5e4;       /* 柔和米灰边框 */
  --border-dark: #d6d3d1;
  
  --shadow-sm: 0 2px 8px rgba(28, 25, 23, 0.04);
  --shadow-md: 0 10px 30px rgba(28, 25, 23, 0.08);
  --shadow-glow: 0 8px 25px rgba(67, 56, 202, 0.25);
  
  --radius-lg: 16px;
  --radius-xl: 24px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
}

body {
  background-color: var(--bg-main);
  color: var(--text-main);
  line-height: 1.65;
  overflow-x: hidden;
}

/* Container */
.container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Header & Nav */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--bg-header);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
}

.nav-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--text-main);
  font-weight: 800;
  font-size: 1.35rem;
  letter-spacing: -0.5px;
}

.brand-logo img {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  object-fit: cover;
  box-shadow: 0 4px 12px rgba(67, 56, 202, 0.2);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 600;
  transition: color 0.2s ease;
}

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

/* 机场推荐 External Nav Button */
.nav-recommend-btn {
  background: var(--accent-light);
  color: #b45309 !important;
  border: 1px solid rgba(217, 119, 6, 0.3);
  padding: 0.45rem 1rem;
  border-radius: 20px;
  transition: all 0.3s ease;
}

.nav-recommend-btn:hover {
  background: #d97706;
  color: #ffffff !important;
  box-shadow: 0 4px 15px rgba(217, 119, 6, 0.3);
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  background: var(--primary);
  color: #ffffff;
  font-weight: 600;
  padding: 0.75rem 1.6rem;
  border-radius: 12px;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
  box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
  background: var(--primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 10px 25px rgba(67, 56, 202, 0.35);
}

.btn-lg {
  padding: 1rem 2.2rem;
  font-size: 1.05rem;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--bg-card);
  color: var(--text-main);
  font-weight: 600;
  padding: 0.75rem 1.6rem;
  border-radius: 12px;
  text-decoration: none;
  border: 1px solid var(--border-dark);
  box-shadow: var(--shadow-sm);
  transition: all 0.2s ease;
}

.btn-secondary:hover {
  background: #ffffff;
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-2px);
}

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-main);
  font-size: 1.5rem;
  cursor: pointer;
}

/* Hero Section */
.hero-section {
  padding: 5.5rem 0 4.5rem;
  position: relative;
  text-align: center;
  background: radial-gradient(circle at 50% 10%, rgba(217, 119, 6, 0.08) 0%, rgba(247, 244, 237, 0) 70%);
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--accent-light);
  color: #92400e;
  border: 1px solid rgba(217, 119, 6, 0.25);
  padding: 0.4rem 1.1rem;
  border-radius: 50px;
  font-size: 0.88rem;
  font-weight: 700;
  margin-bottom: 1.75rem;
}

.hero-title {
  font-size: 3.1rem;
  font-weight: 900;
  line-height: 1.25;
  margin-bottom: 1.25rem;
  color: var(--text-main);
  letter-spacing: -0.8px;
}

.hero-highlight {
  color: var(--primary);
  position: relative;
  display: inline-block;
}

.hero-highlight::after {
  content: "";
  position: absolute;
  bottom: 4px;
  left: 0;
  width: 100%;
  height: 8px;
  background: rgba(67, 56, 202, 0.15);
  border-radius: 4px;
  z-index: -1;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-muted);
  max-width: 820px;
  margin: 0 auto 2.5rem;
  line-height: 1.75;
}

.hero-cta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.25rem;
  flex-wrap: wrap;
  margin-bottom: 3.5rem;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
  max-width: 1020px;
  margin: 0 auto;
  padding: 2.2rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
}

.stat-item h3 {
  font-size: 2rem;
  color: var(--primary);
  font-weight: 800;
}

.stat-item p {
  color: var(--text-muted);
  font-size: 0.92rem;
  font-weight: 500;
}

/* Sections */
.section {
  padding: 5rem 0;
  border-bottom: 1px solid var(--border-color);
}

.section-header {
  text-align: center;
  max-width: 750px;
  margin: 0 auto 3.5rem;
}

.section-tag {
  color: var(--accent);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 1.2px;
  font-size: 0.85rem;
  margin-bottom: 0.5rem;
  display: block;
}

.section-title {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 1rem;
}

.section-subtitle {
  color: var(--text-muted);
  font-size: 1.05rem;
}

/* Features Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(270px, 1fr));
  gap: 2rem;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 2.25rem;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}

.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary);
}

.feature-icon {
  width: 56px;
  height: 56px;
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
  font-size: 1.6rem;
  margin-bottom: 1.35rem;
}

.feature-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  color: var(--text-main);
}

.feature-card p {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.65;
}

/* Airport Table (米色温馨明亮风) */
.table-container {
  overflow-x: auto;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
}

.airport-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  min-width: 800px;
}

.airport-table th,
.airport-table td {
  padding: 1.25rem 1.6rem;
  border-bottom: 1px solid var(--border-color);
}

.airport-table th {
  background: #f5f0e6;
  color: var(--text-main);
  font-weight: 700;
  font-size: 0.92rem;
}

.airport-table tbody tr {
  transition: background 0.2s ease;
}

.airport-table tbody tr:hover {
  background: #fbf9f4;
}

.airport-table tr.featured-row {
  background: #f0edfe;
  border-left: 4px solid var(--primary);
}

.airport-name {
  font-weight: 700;
  font-size: 1.05rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.tag-recommended {
  background: var(--primary);
  color: #fff;
  font-size: 0.75rem;
  padding: 0.15rem 0.55rem;
  border-radius: 6px;
  font-weight: 700;
}

/* Pricing Grid */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 2rem;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 2.5rem 2rem;
  display: flex;
  flex-direction: column;
  position: relative;
  box-shadow: var(--shadow-sm);
  transition: all 0.3s ease;
}

.pricing-card.popular {
  border: 2px solid var(--primary);
  box-shadow: 0 12px 35px rgba(67, 56, 202, 0.15);
  transform: scale(1.03);
  background: #ffffff;
}

.popular-badge {
  position: absolute;
  top: -14px;
  right: 20px;
  background: var(--primary);
  color: #fff;
  font-size: 0.8rem;
  font-weight: 700;
  padding: 0.3rem 0.9rem;
  border-radius: 20px;
  box-shadow: 0 4px 12px rgba(67, 56, 202, 0.3);
}

.plan-name {
  font-size: 1.35rem;
  font-weight: 800;
  margin-bottom: 0.5rem;
}

.plan-price {
  font-size: 2.6rem;
  font-weight: 900;
  color: var(--primary);
  margin-bottom: 1.5rem;
}

.plan-price span {
  font-size: 0.95rem;
  color: var(--text-muted);
  font-weight: 500;
}

.plan-features {
  list-style: none;
  margin-bottom: 2rem;
  flex-grow: 1;
}

.plan-features li {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-bottom: 0.85rem;
}

/* Articles Section Grid */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
}

.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}

.article-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary);
}

.article-content {
  padding: 2rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.article-category {
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 800;
  text-transform: uppercase;
  margin-bottom: 0.6rem;
  letter-spacing: 0.5px;
}

.article-title {
  font-size: 1.2rem;
  font-weight: 800;
  line-height: 1.45;
  margin-bottom: 0.85rem;
}

.article-title a {
  color: var(--text-main);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

.article-excerpt {
  color: var(--text-muted);
  font-size: 0.94rem;
  line-height: 1.65;
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

.article-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--text-light);
  border-top: 1px solid var(--border-color);
  padding-top: 1rem;
}

/* User Reviews Section */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 2rem;
  box-shadow: var(--shadow-sm);
}

.review-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
}

.avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  color: #fff;
}

.user-info h4 {
  font-size: 1rem;
  font-weight: 700;
}

.user-info p {
  font-size: 0.82rem;
  color: var(--text-muted);
}

.stars {
  color: #d97706;
  margin-bottom: 0.75rem;
}

.review-text {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.65;
}

/* FAQ Accordion */
.faq-list {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.faq-question {
  width: 100%;
  padding: 1.35rem 1.6rem;
  text-align: left;
  background: none;
  border: none;
  color: var(--text-main);
  font-size: 1.05rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  transition: background 0.2s ease;
}

.faq-question:hover {
  background: #fbf9f4;
}

.faq-icon {
  font-size: 1.1rem;
  color: var(--text-muted);
  transition: transform 0.3s ease;
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
  background: #faf7f2;
}

.faq-answer-inner {
  padding: 0 1.6rem 1.35rem;
  color: var(--text-muted);
  font-size: 0.96rem;
  line-height: 1.75;
}

/* Footer (页脚 PBN 权重通道) */
footer {
  background-color: #ede8df;
  border-top: 1px solid var(--border-dark);
  padding: 3.5rem 0 2.2rem;
  text-align: center;
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--text-main);
  font-weight: 800;
  font-size: 1.2rem;
}

.footer-brand img {
  width: 34px;
  height: 34px;
  border-radius: 8px;
}

.footer-desc {
  color: var(--text-muted);
  font-size: 0.9rem;
  max-width: 620px;
}

/* Essential PBN Link Section Requirements */
.footer-links-zone {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.25rem;
  margin-top: 1rem;
  padding-top: 1.25rem;
  border-top: 1px dashed #d6d3d1;
  font-size: 0.88rem;
  color: var(--text-muted);
}

.footer-pbn-link {
  color: var(--text-main);
  font-weight: 600;
  text-decoration: none;
  transition: color 0.2s ease;
}

.footer-pbn-link:hover {
  color: var(--primary);
  text-decoration: underline;
}

.copyright {
  color: var(--text-light);
  font-size: 0.82rem;
  margin-top: 1rem;
}

/* Article Single View Layout */
.article-container {
  max-width: 880px;
  margin: 0 auto;
  padding: 3.5rem 1.5rem 6rem;
}

.article-header {
  margin-bottom: 2.5rem;
  text-align: center;
}

.breadcrumb {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 1.25rem;
}

.breadcrumb a {
  color: var(--primary);
  text-decoration: none;
  font-weight: 600;
}

.article-body {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 3.5rem 3rem;
  font-size: 1.05rem;
  line-height: 1.85;
  color: var(--text-main);
  box-shadow: var(--shadow-md);
}

.article-body h2 {
  font-size: 1.65rem;
  color: var(--text-main);
  margin: 2.25rem 0 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--bg-main);
}

.article-body h3 {
  font-size: 1.3rem;
  color: var(--primary);
  margin: 1.6rem 0 0.75rem;
}

.article-body p {
  margin-bottom: 1.35rem;
  color: #334155;
}

.article-body ul, .article-body ol {
  margin-bottom: 1.35rem;
  padding-left: 1.5rem;
}

.article-body li {
  margin-bottom: 0.5rem;
}

.article-cta-box {
  background: var(--bg-main);
  border: 1px solid var(--border-dark);
  border-radius: var(--radius-lg);
  padding: 2.25rem;
  text-align: center;
  margin: 2.5rem 0;
  box-shadow: var(--shadow-sm);
}

/* Responsive */
@media (max-width: 768px) {
  .hero-title {
    font-size: 2.2rem;
  }
  
  .nav-links {
    display: none;
    position: absolute;
    top: 80px;
    left: 0;
    width: 100%;
    background: var(--bg-main);
    flex-direction: column;
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-md);
  }

  .nav-links.active {
    display: flex;
  }

  .mobile-toggle {
    display: block;
  }

  .pricing-card.popular {
    transform: none;
  }

  .article-body {
    padding: 2rem 1.5rem;
  }
}