/* 疾风云机场官网落地页 - 核心样式文件 */
/* @import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Outfit:wght@400;500;600;700;800&family=Noto+Sans+SC:wght@300;400;500;700&display=swap'); */

:root {
  --primary-color: #8b5cf6; /* 迷幻紫 */
  --primary-glow: rgba(139, 92, 246, 0.4);
  --secondary-color: #3b82f6; /* 电光蓝 */
  --secondary-glow: rgba(59, 130, 246, 0.3);
  --accent-color: #ec4899; /* 霓虹粉 */
  --accent-glow: rgba(236, 72, 153, 0.3);
  
  --bg-gradient-start: #ffffff;
  --bg-gradient-end: #f5f3ff; /* 极其淡的紫色 */
  
  --text-primary: #0f172a; /* 深石板色 */
  --text-secondary: #475569; /* 中石板色 */
  --text-muted: #94a3b8; /* 浅石板色 */
  
  --border-light: rgba(139, 92, 246, 0.12);
  --border-focus: rgba(139, 92, 246, 0.35);
  
  --card-bg: rgba(255, 255, 255, 0.75);
  --card-shadow: 0 20px 40px -15px rgba(139, 92, 246, 0.08);
  --card-shadow-hover: 0 30px 60px -10px rgba(139, 92, 246, 0.15);
  
  --font-title: 'Outfit', 'Inter', 'Noto Sans SC', sans-serif;
  --font-body: 'Inter', 'Noto Sans SC', sans-serif;
  
  --transition-smooth: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-fast: all 0.2s ease;
}

/* Base resets & styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--bg-gradient-start);
}

body {
  font-family: var(--font-body);
  color: var(--text-primary);
  background: linear-gradient(180deg, var(--bg-gradient-start) 0%, var(--bg-gradient-end) 100%);
  min-height: 100vh;
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
}

/* Background Glowing Orbs (未来感渐变光晕) */
.glowing-orbs-container {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.12;
  mix-blend-mode: multiply;
  animation: orb-float 20s infinite ease-in-out alternate;
}

.orb-1 {
  top: 5%;
  right: 5%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, var(--primary-color) 0%, var(--secondary-color) 100%);
  animation-duration: 25s;
}

.orb-2 {
  top: 35%;
  left: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--primary-color) 0%, var(--accent-color) 100%);
  animation-duration: 30s;
  animation-delay: -5s;
}

.orb-3 {
  top: 70%;
  right: -5%;
  width: 550px;
  height: 550px;
  background: radial-gradient(circle, var(--secondary-color) 0%, var(--primary-color) 100%);
  animation-duration: 28s;
  animation-delay: -10s;
}

@keyframes orb-float {
  0% {
    transform: translate(0px, 0px) scale(1);
  }
  50% {
    transform: translate(40px, -60px) scale(1.1);
  }
  100% {
    transform: translate(-30px, 30px) scale(0.95);
  }
}

/* Common Layout Elements */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
  position: relative;
  z-index: 1;
}

section {
  padding: 6rem 0;
  position: relative;
}

/* Typography & Titles */
h1, h2, h3, h4 {
  font-family: var(--font-title);
  font-weight: 700;
  line-height: 1.25;
  color: var(--text-primary);
}

.gradient-text {
  background: linear-gradient(135deg, #4f46e5 0%, var(--primary-color) 50%, var(--accent-color) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: inline-block;
}

.section-header {
  text-align: center;
  margin-bottom: 4rem;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.section-tag {
  display: inline-block;
  padding: 0.35rem 1rem;
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--primary-color);
  background: rgba(139, 92, 246, 0.08);
  border: 1px solid rgba(139, 92, 246, 0.15);
  border-radius: 100px;
  margin-bottom: 1rem;
  letter-spacing: 0.05em;
}

.section-title {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--text-secondary);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.875rem 2rem;
  font-size: 1rem;
  font-weight: 600;
  border-radius: 12px;
  cursor: pointer;
  transition: var(--transition-smooth);
  text-decoration: none;
  gap: 0.5rem;
  border: 1px solid transparent;
  outline: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-color) 0%, #6366f1 100%);
  color: #ffffff;
  box-shadow: 0 10px 20px -5px rgba(139, 92, 246, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 15px 25px -3px rgba(139, 92, 246, 0.5), 0 0 15px rgba(139, 92, 246, 0.3);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.8);
  color: var(--text-primary);
  border: 1px solid var(--border-light);
}

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

.btn-outline {
  background: transparent;
  color: var(--primary-color);
  border: 2px solid var(--primary-color);
}

.btn-outline:hover {
  background: rgba(139, 92, 246, 0.05);
  transform: translateY(-2px);
}

.btn-gradient-cyan {
  background: linear-gradient(135deg, #10b981 0%, #06b6d4 100%);
  color: white;
  box-shadow: 0 10px 20px -5px rgba(6, 182, 212, 0.4);
}

.btn-gradient-cyan:hover {
  transform: translateY(-2px);
  box-shadow: 0 15px 25px -3px rgba(6, 182, 212, 0.5), 0 0 15px rgba(6, 182, 212, 0.3);
}

.btn-dark-outline {
  background: transparent;
  color: var(--text-primary);
  border: 2px solid var(--text-primary);
}

.btn-dark-outline:hover {
  background: rgba(15, 23, 42, 0.05);
  transform: translateY(-2px);
}

/* Glass Card Base */
.glass-card {
  background: var(--card-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-light);
  border-radius: 20px;
  box-shadow: var(--card-shadow);
  transition: var(--transition-smooth);
}

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

/* Header & Navigation */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  background: rgba(255, 255, 255, 0.6);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(139, 92, 246, 0.08);
  transition: var(--transition-smooth);
}

header.scrolled {
  background: rgba(255, 255, 255, 0.85);
  box-shadow: 0 10px 30px -10px rgba(139, 92, 246, 0.08);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4.5rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-title);
  font-size: 1.5rem;
  font-weight: 800;
  text-decoration: none;
  color: var(--text-primary);
}

.logo-icon {
  width: 2.2rem;
  height: 2.2rem;
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: bold;
}

.nav-menu {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 2.5rem;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  transition: var(--transition-fast);
  position: relative;
  padding: 0.25rem 0;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
  transition: var(--transition-fast);
  border-radius: 10px;
}

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

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

.nav-cta {
  display: flex;
  align-items: center;
  gap: 1rem;
}

/* Mobile Nav Toggle */
.mobile-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 24px;
  height: 18px;
  background: transparent;
  border: none;
  cursor: pointer;
  z-index: 101;
}

.mobile-toggle span {
  width: 100%;
  height: 2px;
  background-color: var(--text-primary);
  border-radius: 2px;
  transition: var(--transition-fast);
}

/* Hero Section */
.hero {
  padding-top: 10rem;
  padding-bottom: 6rem;
  text-align: center;
  overflow: hidden;
}

.hero-content {
  max-width: 900px;
  margin: 0 auto;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1.25rem;
  background: rgba(139, 92, 246, 0.05);
  border: 1px solid rgba(139, 92, 246, 0.15);
  border-radius: 100px;
  margin-bottom: 2rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--primary-color);
}

.hero-tag .dot {
  width: 8px;
  height: 8px;
  background-color: var(--accent-color);
  border-radius: 50%;
  animation: pulse-glow 1.5s infinite alternate;
}

@keyframes pulse-glow {
  0% { transform: scale(0.8); box-shadow: 0 0 0 0 rgba(236, 72, 153, 0.7); }
  100% { transform: scale(1.2); box-shadow: 0 0 8px 3px rgba(236, 72, 153, 0.3); }
}

.hero-title {
  font-size: 4rem;
  line-height: 1.15;
  margin-bottom: 1.5rem;
  letter-spacing: -0.03em;
}

.hero-desc {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: 3rem;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.hero-ctas {
  display: flex;
  justify-content: center;
  gap: 1.25rem;
  margin-bottom: 4rem;
}

/* Stats Counter */
.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  max-width: 800px;
  margin: 0 auto;
  padding: 2rem;
}

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

.stat-num {
  font-size: 2.25rem;
  font-weight: 800;
  font-family: var(--font-title);
  color: var(--primary-color);
  margin-bottom: 0.25rem;
  display: block;
}

.stat-label {
  font-size: 0.875rem;
  color: var(--text-secondary);
  font-weight: 500;
}

/* Features Section */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
}

.feature-card {
  padding: 2.5rem 2rem;
  text-align: left;
}

.feature-icon-wrapper {
  width: 3.5rem;
  height: 3.5rem;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.1) 0%, rgba(59, 130, 246, 0.1) 100%);
  border: 1px solid rgba(139, 92, 246, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
  color: var(--primary-color);
  transition: var(--transition-smooth);
}

.feature-card:hover .feature-icon-wrapper {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
  color: white;
  transform: scale(1.05);
  box-shadow: 0 10px 20px -5px rgba(139, 92, 246, 0.3);
}

.feature-title {
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
}

.feature-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
}

/* Pricing Section */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  align-items: stretch;
  max-width: 1100px;
  margin: 0 auto;
}

.pricing-card {
  padding: 3rem 2.25rem;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

.pricing-card.popular {
  border-color: var(--primary-color);
  box-shadow: 0 25px 50px -12px rgba(139, 92, 246, 0.15);
  background: linear-gradient(180deg, #ffffff 0%, #fbfaff 100%);
  transform: translateY(-8px);
}

.pricing-card.popular:hover {
  transform: translateY(-12px);
  box-shadow: 0 30px 60px -10px rgba(139, 92, 246, 0.25);
}

/* Red / Pink Recommend Badge (同参考图样式) */
.popular-badge {
  position: absolute;
  top: 1rem;
  right: 1.25rem;
  background: linear-gradient(135deg, #ff4e50 0%, #f93d66 100%);
  color: white;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.3rem 0.8rem;
  border-radius: 6px;
  box-shadow: 0 4px 10px rgba(249, 61, 102, 0.3);
  letter-spacing: 0.05em;
}

.plan-name {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 1.5rem;
}

.plan-price-wrapper {
  margin-bottom: 2.25rem;
  display: flex;
  align-items: baseline;
}

.plan-price {
  font-size: 3rem;
  font-weight: 800;
  font-family: var(--font-title);
  color: var(--text-primary);
  line-height: 1;
}

.plan-price.gradient {
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--primary-color) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.plan-period {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-left: 0.4rem;
}

.plan-features {
  list-style: none;
  margin-bottom: 3rem;
  flex-grow: 1;
}

.plan-features li {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 1.1rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.plan-features li svg {
  flex-shrink: 0;
  width: 1.25rem;
  height: 1.25rem;
  color: var(--primary-color);
}

.pricing-card.popular .plan-features li svg {
  color: #10b981; /* 推荐套餐打勾为绿色 */
}

.pricing-action {
  width: 100%;
}

/* Quick Config Guides */
.guides-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.guide-card {
  padding: 2rem 1.5rem;
  text-align: center;
}

.guide-logo {
  width: 4rem;
  height: 4rem;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.5rem;
  font-weight: 800;
  font-size: 1.5rem;
  color: white;
  transition: var(--transition-smooth);
}

.guide-card:hover .guide-logo {
  transform: rotate(10deg) scale(1.05);
}

.guide-clash { background: linear-gradient(135deg, #ff9f43 0%, #ff5252 100%); }
.guide-rocket { background: linear-gradient(135deg, #0abde3 0%, #10ac84 100%); }
.guide-singbox { background: linear-gradient(135deg, #5f27cd 0%, #341f97 100%); }
.guide-v2ray { background: linear-gradient(135deg, #2e86de 0%, #1dd1a1 100%); }

.guide-name {
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
}

.guide-platform {
  font-size: 0.8rem;
  color: var(--primary-color);
  font-weight: 600;
  background: rgba(139, 92, 246, 0.06);
  padding: 0.2rem 0.6rem;
  border-radius: 5px;
  display: inline-block;
  margin-bottom: 1rem;
}

.guide-btn {
  font-size: 0.875rem;
  padding: 0.5rem 1rem;
  width: 100%;
}

/* FAQ Section */
.faq-container {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  margin-bottom: 1.25rem;
}

.faq-trigger {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem 2rem;
  background: var(--card-bg);
  border: 1px solid var(--border-light);
  border-radius: 16px;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
  text-align: left;
  cursor: pointer;
  transition: var(--transition-smooth);
  outline: none;
}

.faq-trigger:hover {
  border-color: var(--border-focus);
  background: #ffffff;
}

.faq-icon {
  width: 1.5rem;
  height: 1.5rem;
  color: var(--primary-color);
  transition: var(--transition-smooth);
}

.faq-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0.16, 1, 0.3, 1), padding 0.4s ease;
  padding: 0 2rem;
}

.faq-item.active .faq-trigger {
  border-bottom-left-radius: 0;
  border-bottom-right-radius: 0;
  background: #ffffff;
  border-color: var(--border-focus);
}

.faq-item.active .faq-content {
  max-height: 250px;
  padding: 1.5rem 2rem;
  background: #ffffff;
  border: 1px solid var(--border-focus);
  border-top: none;
  border-bottom-left-radius: 16px;
  border-bottom-right-radius: 16px;
}

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

.faq-answer {
  color: var(--text-secondary);
  font-size: 0.975rem;
  line-height: 1.7;
}

/* SEO Articles Grid Section */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.blog-card {
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.blog-img-placeholder {
  height: 12rem;
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.05) 0%, rgba(236, 72, 153, 0.05) 100%);
  border-bottom: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.blog-img-placeholder::after {
  content: '';
  position: absolute;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at center, rgba(139, 92, 246, 0.1) 0%, transparent 70%);
}

.blog-card:hover .blog-img-placeholder::after {
  transform: scale(1.2);
}

.blog-img-placeholder svg {
  width: 3.5rem;
  height: 3.5rem;
  color: var(--primary-color);
  opacity: 0.6;
  z-index: 1;
}

.blog-body {
  padding: 2rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.blog-meta {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-bottom: 0.75rem;
  display: flex;
  gap: 1rem;
  font-weight: 500;
}

.blog-meta span {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.blog-title {
  font-size: 1.15rem;
  margin-bottom: 1rem;
  line-height: 1.4;
  color: var(--text-primary);
  transition: var(--transition-fast);
}

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

.blog-title a {
  text-decoration: none;
  color: inherit;
}

.blog-excerpt {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  flex-grow: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.blog-link {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--primary-color);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  transition: var(--transition-fast);
}

.blog-link svg {
  width: 1rem;
  height: 1rem;
  transition: var(--transition-fast);
}

.blog-card:hover .blog-link svg {
  transform: translateX(4px);
}

/* Call To Action (CTA) Section */
.cta-banner {
  text-align: center;
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.05) 0%, rgba(59, 130, 246, 0.05) 50%, rgba(236, 72, 153, 0.05) 100%);
  border: 1px solid var(--border-light);
  border-radius: 30px;
  padding: 5rem 2rem;
  position: relative;
  overflow: hidden;
}

.cta-banner::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -20%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(139, 92, 246, 0.1) 0%, transparent 70%);
  filter: blur(50px);
}

.cta-banner::after {
  content: '';
  position: absolute;
  bottom: -50%;
  right: -20%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(236, 72, 153, 0.1) 0%, transparent 70%);
  filter: blur(50px);
}

.cta-title {
  font-size: 2.75rem;
  margin-bottom: 1.5rem;
}

.cta-desc {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 2.5rem;
}

/* Article Template (文章详情页特有样式) */
.article-container {
  max-width: 850px;
  margin: 10rem auto 6rem;
  padding: 0 1.5rem;
  position: relative;
  z-index: 1;
}

.article-header {
  text-align: left;
  margin-bottom: 3rem;
  border-bottom: 1px solid var(--border-light);
  padding-bottom: 2rem;
}

.article-category {
  display: inline-block;
  padding: 0.3rem 0.8rem;
  background: rgba(139, 92, 246, 0.08);
  color: var(--primary-color);
  font-size: 0.85rem;
  font-weight: 600;
  border-radius: 6px;
  margin-bottom: 1rem;
  text-decoration: none;
}

.article-header-title {
  font-size: 3rem;
  line-height: 1.2;
  margin-bottom: 1.5rem;
}

.article-header-meta {
  display: flex;
  gap: 1.5rem;
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
}

.article-header-meta span {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.article-content {
  font-size: 1.1rem;
  line-height: 1.8;
  color: #334155;
}

.article-content h2 {
  font-size: 1.8rem;
  margin: 2.5rem 0 1.25rem;
  color: var(--text-primary);
  border-left: 4px solid var(--primary-color);
  padding-left: 0.75rem;
}

.article-content h3 {
  font-size: 1.4rem;
  margin: 2rem 0 1rem;
  color: var(--text-primary);
}

.article-content p {
  margin-bottom: 1.5rem;
  text-align: justify;
}

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

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

.article-content blockquote {
  background: rgba(139, 92, 246, 0.03);
  border-left: 4px solid var(--primary-color);
  padding: 1rem 1.5rem;
  margin: 2rem 0;
  border-radius: 0 12px 12px 0;
  font-style: italic;
  color: var(--text-secondary);
}

.article-content strong {
  color: var(--text-primary);
  font-weight: 600;
}

/* Interlinks style in text (内链样式) */
.article-content a.internal-link {
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 600;
  border-bottom: 1px dashed var(--primary-color);
  transition: var(--transition-fast);
}

.article-content a.internal-link:hover {
  color: var(--accent-color);
  border-bottom-color: var(--accent-color);
  background: rgba(139, 92, 246, 0.05);
}

/* CTA in article */
.article-inline-cta {
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.06) 0%, rgba(59, 130, 246, 0.06) 100%);
  border: 1px solid var(--border-light);
  border-radius: 16px;
  padding: 2rem;
  margin: 3rem 0;
  text-align: center;
}

.article-inline-cta h4 {
  font-size: 1.3rem;
  margin-bottom: 0.75rem;
}

.article-inline-cta p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

/* Article navigation (前一篇/后一篇) */
.article-nav {
  display: flex;
  justify-content: space-between;
  gap: 2rem;
  margin-top: 4rem;
  border-top: 1px solid var(--border-light);
  padding-top: 2rem;
}

.art-nav-btn {
  flex: 1;
  padding: 1.5rem;
  text-decoration: none;
  color: var(--text-primary);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.art-nav-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  font-weight: 600;
}

.art-nav-title {
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.4;
  transition: var(--transition-fast);
}

.art-nav-btn:hover .art-nav-title {
  color: var(--primary-color);
}

.art-nav-btn.prev { text-align: left; }
.art-nav-btn.next { text-align: right; }

/* Footer */
footer {
  background: #090514; /* 极深紫色背景 */
  color: #94a3b8;
  padding: 5rem 0 2rem;
  border-top: 1px solid rgba(139, 92, 246, 0.15);
  font-size: 0.95rem;
}

footer .logo {
  color: #ffffff;
  margin-bottom: 1.5rem;
}

footer h4 {
  color: #ffffff;
  font-size: 1.1rem;
  margin-bottom: 1.5rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 4rem;
  margin-bottom: 4rem;
}

.footer-desc {
  line-height: 1.7;
}

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

.footer-links li {
  margin-bottom: 0.75rem;
}

.footer-links a {
  color: #94a3b8;
  text-decoration: none;
  transition: var(--transition-fast);
}

.footer-links a:hover {
  color: #ffffff;
  padding-left: 4px;
}

.footer-contact li {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
}

.footer-legal {
  display: flex;
  gap: 2rem;
}

.footer-legal a {
  color: #94a3b8;
  text-decoration: none;
  transition: var(--transition-fast);
}

.footer-legal a:hover {
  color: #ffffff;
}

/* Response Media Queries (响应式排版) */
@media (max-width: 1024px) {
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
    max-width: 750px;
  }
  .pricing-card.popular {
    grid-column: span 2;
    transform: none;
  }
  .pricing-card.popular:hover {
    transform: translateY(-4px);
  }
  .blog-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 3rem;
  }
}

@media (max-width: 768px) {
  .hero-title {
    font-size: 2.75rem;
  }
  .hero-desc {
    font-size: 1.1rem;
  }
  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.25rem;
  }
  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 450px;
  }
  .pricing-card.popular {
    grid-column: span 1;
  }
  .guides-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .blog-grid {
    grid-template-columns: 1fr;
    max-width: 450px;
    margin: 0 auto;
  }
  .mobile-toggle {
    display: flex;
  }
  .nav-menu {
    position: fixed;
    top: 4.5rem;
    left: -100%;
    width: 100%;
    height: calc(100vh - 4.5rem);
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 3rem 2rem;
    gap: 2rem;
    transition: var(--transition-smooth);
    border-top: 1px solid rgba(139, 92, 246, 0.08);
  }
  .nav-menu.active {
    left: 0;
  }
  .nav-cta {
    display: none;
  }
  .article-header-title {
    font-size: 2.25rem;
  }
  .article-nav {
    flex-direction: column;
    gap: 1rem;
  }
}

@media (max-width: 480px) {
  .hero-ctas {
    flex-direction: column;
    align-items: stretch;
    padding: 0 1rem;
  }
  .guides-grid {
    grid-template-columns: 1fr;
    max-width: 300px;
    margin: 0 auto;
  }
  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
    padding: 1rem 0;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .footer-bottom {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }
  .footer-legal {
    justify-content: center;
  }
}