/* ==========================================================================
   一元机场 (yiyuan-jichang.com) 极光多彩科技风全站样式表
   ========================================================================== */

:root {
  --bg-main: #f6f8fd;
  --bg-card: rgba(255, 255, 255, 0.82);
  --bg-card-hover: rgba(255, 255, 255, 0.94);
  --text-main: #0f172a;
  --text-secondary: #334155;
  --text-muted: #64748b;
  
  --border-light: rgba(99, 102, 241, 0.15);
  --border-glow: rgba(139, 92, 246, 0.4);
  
  /* Rich Multi-Color Palette */
  --primary-indigo: #4f46e5;
  --primary-violet: #8b5cf6;
  --primary-pink: #ec4899;
  --primary-cyan: #06b6d4;
  --primary-emerald: #10b981;
  --primary-amber: #f59e0b;
  
  --grad-multicolor: linear-gradient(135deg, #4f46e5 0%, #8b5cf6 35%, #ec4899 70%, #06b6d4 100%);
  --grad-aurora: linear-gradient(135deg, #6366f1 0%, #a855f7 50%, #ec4899 100%);
  --grad-btn: linear-gradient(135deg, #4f46e5 0%, #7c3aed 50%, #06b6d4 100%);
  --grad-badge: linear-gradient(135deg, rgba(99, 102, 241, 0.12) 0%, rgba(236, 72, 153, 0.12) 100%);
  
  --shadow-sm: 0 4px 14px rgba(79, 70, 229, 0.04);
  --shadow-md: 0 10px 28px rgba(79, 70, 229, 0.08);
  --shadow-lg: 0 18px 40px rgba(124, 58, 237, 0.16);
  --shadow-multicolor: 0 12px 32px -6px rgba(124, 58, 237, 0.35);
  
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 26px;
  --radius-full: 9999px;
  
  --transition-fast: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reset & Basic Setup */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Inter", "Segoe UI", Roboto, "Helvetica Neue", "PingFang SC", "Microsoft YaHei", sans-serif;
  background-color: var(--bg-main);
  background-image: 
    radial-gradient(at 0% 0%, rgba(99, 102, 241, 0.12) 0px, transparent 50%),
    radial-gradient(at 100% 0%, rgba(236, 72, 153, 0.10) 0px, transparent 50%),
    radial-gradient(at 100% 100%, rgba(16, 185, 129, 0.10) 0px, transparent 50%),
    radial-gradient(at 0% 100%, rgba(139, 92, 246, 0.12) 0px, transparent 50%);
  background-attachment: fixed;
  color: var(--text-main);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
}

/* Canvas Dynamic Background */
#bg-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: -1;
  pointer-events: none;
}

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

.section-padding {
  padding: 96px 0;
}

.text-center { text-align: center; }
.text-left { text-align: left; }

/* Gradient Text Effect */
.gradient-text {
  background: var(--grad-multicolor);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.gradient-aurora-text {
  background: var(--grad-aurora);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

/* Section Header */
.section-header {
  margin-bottom: 56px;
  text-align: center;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 18px;
  border-radius: var(--radius-full);
  background: var(--grad-badge);
  border: 1px solid rgba(139, 92, 246, 0.2);
  color: var(--primary-indigo);
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 16px;
  letter-spacing: 0.5px;
  box-shadow: 0 2px 10px rgba(99, 102, 241, 0.08);
}

.section-title {
  font-size: 38px;
  font-weight: 800;
  line-height: 1.25;
  color: var(--text-main);
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}

.section-desc {
  font-size: 18px;
  color: var(--text-secondary);
  max-width: 720px;
  margin: 0 auto;
}

/* Navigation Bar */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(246, 248, 253, 0.82);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(99, 102, 241, 0.12);
  transition: var(--transition-normal);
}

.navbar-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  font-size: 22px;
  font-weight: 800;
  color: var(--text-main);
}

.logo-icon {
  width: 40px;
  height: 40px;
  background: var(--grad-multicolor);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  box-shadow: 0 6px 16px rgba(124, 58, 237, 0.35);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  text-decoration: none;
  color: var(--text-secondary);
  font-weight: 600;
  font-size: 15px;
  transition: var(--transition-fast);
}

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 28px;
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  border: none;
  transition: var(--transition-normal);
  text-decoration: none;
}

.btn-primary {
  background: var(--grad-btn);
  color: #ffffff;
  box-shadow: 0 6px 20px rgba(124, 58, 237, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-multicolor);
  opacity: 0.96;
}

.btn-secondary {
  background: #ffffff;
  color: var(--text-main);
  border: 1px solid rgba(139, 92, 246, 0.25);
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
  border-color: var(--primary-indigo);
  color: var(--primary-indigo);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-lg {
  padding: 16px 36px;
  font-size: 17px;
  border-radius: var(--radius-md);
}

/* Hero Section */
.hero {
  padding-top: 160px;
  padding-bottom: 80px;
  position: relative;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 56px;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  background: var(--grad-badge);
  border: 1px solid rgba(139, 92, 246, 0.25);
  border-radius: var(--radius-full);
  color: var(--primary-indigo);
  font-weight: 700;
  font-size: 14px;
  margin-bottom: 24px;
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.08);
}

.hero-title {
  font-size: 48px;
  font-weight: 900;
  line-height: 1.15;
  margin-bottom: 20px;
  letter-spacing: -1px;
}

.hero-subtitle {
  font-size: 19px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 36px;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 40px;
}

.hero-features-strip {
  display: flex;
  align-items: center;
  gap: 28px;
  border-top: 1px solid var(--border-light);
  padding-top: 24px;
}

.strip-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 700;
  color: var(--text-secondary);
}

/* Hero Right Image & Visual Container */
.hero-visual {
  position: relative;
}

.hero-card-glow {
  position: absolute;
  inset: -15px;
  background: var(--grad-multicolor);
  filter: blur(36px);
  opacity: 0.22;
  border-radius: var(--radius-lg);
  z-index: 0;
}

.hero-image-wrapper {
  position: relative;
  z-index: 1;
  background: var(--bg-card);
  backdrop-filter: blur(24px);
  border: 1px solid rgba(139, 92, 246, 0.25);
  border-radius: var(--radius-lg);
  padding: 16px;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.hero-image-wrapper img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius-md);
  object-fit: cover;
  transition: transform 0.5s ease;
}

.hero-image-wrapper:hover img {
  transform: scale(1.02);
}

/* Floating Overlay Badges on Hero Image */
.hero-overlay-badge {
  position: absolute;
  z-index: 2;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(16px);
  border: 1px solid rgba(99, 102, 241, 0.2);
  padding: 10px 16px;
  border-radius: var(--radius-md);
  box-shadow: 0 8px 24px rgba(79, 70, 229, 0.15);
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  font-weight: 700;
}

.badge-top-left {
  top: 28px;
  left: 28px;
}

.badge-bottom-right {
  bottom: 28px;
  right: 28px;
}

.pulse-dot {
  width: 10px;
  height: 10px;
  background: var(--primary-emerald);
  border-radius: 50%;
  box-shadow: 0 0 12px var(--primary-emerald);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 10px rgba(16, 185, 129, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

/* Feature Cards Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.feature-card {
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  transition: var(--transition-normal);
  position: relative;
  overflow: hidden;
}

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

.feature-icon-wrapper {
  width: 56px;
  height: 56px;
  background: var(--grad-badge);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-indigo);
  margin-bottom: 24px;
  transition: var(--transition-fast);
}

.feature-card:hover .feature-icon-wrapper {
  background: var(--grad-multicolor);
  color: #ffffff;
  box-shadow: 0 8px 20px rgba(124, 58, 237, 0.35);
}

.feature-title {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-main);
}

.feature-desc {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* Pricing Section */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: var(--transition-normal);
}

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

.pricing-card.popular {
  border: 2px solid var(--primary-violet);
  box-shadow: 0 14px 40px rgba(124, 58, 237, 0.2);
  background: rgba(255, 255, 255, 0.95);
}

.popular-badge {
  position: absolute;
  top: -16px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--grad-multicolor);
  color: #ffffff;
  padding: 6px 22px;
  border-radius: var(--radius-full);
  font-size: 13px;
  font-weight: 700;
  box-shadow: 0 6px 16px rgba(124, 58, 237, 0.4);
  letter-spacing: 0.5px;
}

.plan-name {
  font-size: 22px;
  font-weight: 800;
  color: var(--text-main);
  text-align: center;
  margin-bottom: 20px;
}

.plan-price-box {
  text-align: center;
  margin-bottom: 20px;
}

.currency {
  font-size: 26px;
  font-weight: 800;
  color: var(--primary-indigo);
}

.amount {
  font-size: 46px;
  font-weight: 900;
  background: var(--grad-aurora);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: -1px;
}

.period {
  font-size: 15px;
  color: var(--text-muted);
  font-weight: 600;
}

.plan-subtitle {
  font-size: 14px;
  color: var(--text-secondary);
  text-align: center;
  min-height: 44px;
  margin-bottom: 28px;
}

.plan-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 36px;
  flex-grow: 1;
}

.plan-features li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 14px;
  color: var(--text-secondary);
  font-weight: 500;
}

.plan-features li svg {
  width: 18px;
  height: 18px;
  color: var(--primary-indigo);
  flex-shrink: 0;
  margin-top: 3px;
}

.pricing-btn {
  width: 100%;
}

/* Tutorial Section with Tabs */
.tutorial-box {
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-md);
}

.tutorial-tabs {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-bottom: 36px;
  border-bottom: 1px solid var(--border-light);
  padding-bottom: 16px;
}

.tab-btn {
  padding: 12px 28px;
  border-radius: var(--radius-md);
  font-weight: 700;
  font-size: 16px;
  border: 1px solid transparent;
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition-fast);
}

.tab-btn.active {
  background: var(--grad-badge);
  border-color: rgba(139, 92, 246, 0.3);
  color: var(--primary-indigo);
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
  animation: fadeIn 0.3s ease-in-out;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.steps-list {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.step-item {
  display: flex;
  gap: 24px;
  align-items: flex-start;
  padding: 24px;
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
}

.step-num {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--grad-multicolor);
  color: white;
  font-weight: 800;
  font-size: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: 0 4px 14px rgba(124, 58, 237, 0.3);
}

.step-info h4 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-main);
}

.step-info p {
  font-size: 15px;
  color: var(--text-secondary);
}

/* User Reviews Section */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: var(--transition-normal);
}

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

.review-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
}

.avatar-badge {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--grad-aurora);
  color: white;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
}

.reviewer-name {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-main);
}

.reviewer-role {
  font-size: 13px;
  color: var(--text-muted);
}

.review-text {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* FAQ Accordion Section */
.faq-list {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

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

.faq-question {
  padding: 22px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 17px;
  font-weight: 700;
  cursor: pointer;
  user-select: none;
  color: var(--text-main);
}

.faq-question:hover {
  color: var(--primary-indigo);
}

.faq-icon {
  width: 24px;
  height: 24px;
  transition: transform 0.3s ease;
  color: var(--primary-indigo);
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease-out;
  background: rgba(255, 255, 255, 0.7);
}

.faq-answer-inner {
  padding: 0 28px 24px 28px;
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.75;
}

/* Article Directory Section */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

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

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

.article-category {
  font-size: 13px;
  font-weight: 700;
  color: var(--primary-indigo);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 12px;
}

.article-card-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 12px;
  line-height: 1.4;
}

.article-card-title a {
  text-decoration: none;
  color: var(--text-main);
  transition: var(--transition-fast);
}

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

.article-excerpt {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 20px;
  flex-grow: 1;
}

.article-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 700;
  font-size: 14px;
  color: var(--primary-indigo);
  text-decoration: none;
}

.article-link:hover {
  text-decoration: underline;
}

/* SEO Article Details Page Styling */
.article-page {
  padding-top: 140px;
  padding-bottom: 80px;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 28px;
}

.breadcrumb a {
  color: var(--text-secondary);
  text-decoration: none;
}

.breadcrumb a:hover {
  color: var(--primary-indigo);
}

.article-header {
  margin-bottom: 40px;
  border-bottom: 1px solid var(--border-light);
  padding-bottom: 32px;
}

.article-h1 {
  font-size: 36px;
  font-weight: 900;
  line-height: 1.25;
  margin-bottom: 16px;
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 20px;
  font-size: 14px;
  color: var(--text-muted);
}

.article-body {
  font-size: 16px;
  line-height: 1.85;
  color: var(--text-secondary);
}

.article-body h2 {
  font-size: 26px;
  font-weight: 800;
  color: var(--text-main);
  margin: 40px 0 20px 0;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-light);
}

.article-body h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-main);
  margin: 28px 0 14px 0;
}

.article-body p {
  margin-bottom: 20px;
}

.article-body ul, .article-body ol {
  margin-bottom: 24px;
  padding-left: 24px;
}

.article-body li {
  margin-bottom: 8px;
}

.article-cta-box {
  background: var(--grad-badge);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-lg);
  padding: 40px;
  text-align: center;
  margin: 48px 0;
}

.related-articles {
  margin-top: 60px;
  border-top: 1px solid var(--border-light);
  padding-top: 40px;
}

/* Legal Pages Styling */
.legal-page {
  padding-top: 140px;
  padding-bottom: 80px;
}

.legal-content {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 48px;
}

/* Footer Section */
.footer {
  background: #0f172a;
  color: #94a3b8;
  padding: 80px 0 40px 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 60px;
}

.footer-brand p {
  margin-top: 16px;
  font-size: 15px;
  line-height: 1.6;
  max-width: 320px;
}

.footer-col h5 {
  color: #ffffff;
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 24px;
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-col a {
  color: #94a3b8;
  text-decoration: none;
  font-size: 14px;
  transition: var(--transition-fast);
}

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

.footer-bottom {
  border-top: 1px solid #1e293b;
  padding-top: 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 14px;
}

/* Mobile Responsive */
@media (max-width: 1024px) {
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .pricing-grid { grid-template-columns: 1fr; max-width: 480px; margin: 0 auto; }
  .reviews-grid { grid-template-columns: 1fr; }
  .articles-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 36px; }
}

@media (max-width: 768px) {
  .section-title { font-size: 30px; }
  .hero-title { font-size: 34px; }
  .nav-links { display: none; }
  .features-grid { grid-template-columns: 1fr; }
  .articles-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; gap: 16px; text-align: center; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .btn { width: 100%; text-align: center; }
}