/* 闪狐云机场 Shanhu Cloud Landing Page Design System */
:root {
  --primary-gold: #FF9E00;
  --primary-orange: #FF5500;
  --gold-glow: rgba(255, 158, 0, 0.3);
  --gold-light: #FFD000;
  --bg-dark: #0B0C10;
  --bg-card: rgba(20, 22, 30, 0.82);
  --bg-card-hover: rgba(28, 31, 44, 0.95);
  --border-color: rgba(255, 158, 0, 0.2);
  --border-glow: rgba(255, 158, 0, 0.45);
  --text-main: #F0F2F6;
  --text-muted: #9DA4B4;
  --text-dim: #646A79;
  --success: #10B981;
  --warning: #F59E0B;
  --card-radius: 16px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

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

html {
  scroll-behavior: smooth;
  font-family: var(--font-family);
  background-color: var(--bg-dark);
  color: var(--text-main);
  line-height: 1.6;
}

body {
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
}

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

/* Top Announcement Banner */
.top-announcement {
  background: linear-gradient(90deg, #FF5500 0%, #FF9E00 50%, #FF5500 100%);
  background-size: 200% 100%;
  animation: gradientShift 6s ease infinite;
  color: #000;
  font-weight: 700;
  font-size: 0.9rem;
  padding: 8px 16px;
  text-align: center;
  position: relative;
  z-index: 1001;
}

.top-announcement a {
  color: #000;
  text-decoration: underline;
  margin-left: 8px;
}

@keyframes gradientShift {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

/* Header & Nav */
header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(11, 12, 16, 0.85);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
}

.nav-container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.4rem;
  font-weight: 800;
  color: #FFF;
  text-decoration: none;
}

.logo-icon {
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, var(--primary-gold), var(--primary-orange));
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #000;
  font-weight: 900;
  box-shadow: 0 0 15px var(--gold-glow);
}

.logo span {
  background: linear-gradient(90deg, #FFFFFF, var(--primary-gold));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nav-links {
  display: flex;
  gap: 28px;
  list-style: none;
}

.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  transition: var(--transition);
}

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

.nav-cta {
  background: linear-gradient(135deg, var(--primary-gold), var(--primary-orange));
  color: #000 !important;
  font-weight: 700 !important;
  padding: 10px 22px;
  border-radius: 30px;
  box-shadow: 0 4px 15px var(--gold-glow);
  transition: var(--transition);
  border: none;
  cursor: pointer;
}

.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(255, 158, 0, 0.5);
}

/* Base Layout Container */
.container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 40px 24px;
}

/* Card Styling Base */
.card-box {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: var(--card-radius);
  padding: 32px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
  transition: var(--transition);
}

.card-box:hover {
  border-color: var(--border-glow);
  box-shadow: 0 12px 35px rgba(255, 158, 0, 0.15);
}

/* Hero Section */
.hero-section {
  padding: 60px 0 40px 0;
  text-align: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: rgba(255, 158, 0, 0.12);
  border: 1px solid rgba(255, 158, 0, 0.3);
  border-radius: 30px;
  color: var(--primary-gold);
  font-size: 0.88rem;
  font-weight: 600;
  margin-bottom: 24px;
}

.hero-title {
  font-size: 3.2rem;
  font-weight: 900;
  line-height: 1.2;
  margin-bottom: 20px;
  letter-spacing: -0.5px;
}

.hero-title .highlight {
  background: linear-gradient(135deg, #FFD000 0%, #FF9E00 50%, #FF5500 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.2rem;
  color: var(--text-muted);
  max-width: 760px;
  margin: 0 auto 36px auto;
}

.hero-actions {
  display: flex;
  justify-content: center;
  gap: 18px;
  flex-wrap: wrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-gold), var(--primary-orange));
  color: #0B0C10;
  font-weight: 800;
  font-size: 1.1rem;
  padding: 16px 38px;
  border-radius: 50px;
  text-decoration: none;
  box-shadow: 0 8px 25px var(--gold-glow);
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: none;
  cursor: pointer;
}

.btn-primary:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 12px 30px rgba(255, 158, 0, 0.6);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: #FFF;
  font-weight: 600;
  font-size: 1.1rem;
  padding: 16px 34px;
  border-radius: 50px;
  text-decoration: none;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
}

.btn-secondary:hover {
  background: rgba(255, 158, 0, 0.15);
  border-color: var(--primary-gold);
  color: var(--primary-gold);
  transform: translateY(-2px);
}

.hero-stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 50px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--card-radius);
  padding: 20px;
  text-align: center;
}

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

.stat-lbl {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* Section Header */
.section-header {
  text-align: center;
  margin-bottom: 40px;
}

.section-tag {
  color: var(--primary-gold);
  font-weight: 700;
  text-transform: uppercase;
  font-size: 0.85rem;
  letter-spacing: 1px;
  margin-bottom: 8px;
  display: block;
}

.section-title {
  font-size: 2.2rem;
  font-weight: 800;
  margin-bottom: 12px;
}

.section-subtitle {
  color: var(--text-muted);
  font-size: 1.05rem;
  max-width: 640px;
  margin: 0 auto;
}

/* Section Margin */
.section-padding {
  padding: 50px 0;
}

/* Node Latency & Status Board */
.node-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}

.node-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--card-radius);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: var(--transition);
}

.node-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--primary-gold);
}

.node-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.node-flag-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.05rem;
}

.node-flag {
  font-size: 1.4rem;
}

.node-ping {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--success);
  background: rgba(16, 185, 129, 0.12);
  padding: 4px 10px;
  border-radius: 20px;
}

.node-meta {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.load-bar-bg {
  width: 100%;
  height: 6px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 3px;
  overflow: hidden;
}

.load-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary-gold), var(--primary-orange));
  border-radius: 3px;
  width: 35%;
}

.refresh-node-btn {
  margin-top: 24px;
  text-align: center;
}

/* Core Advantages Grid */
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}

.advantage-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--card-radius);
  padding: 30px;
  position: relative;
  overflow: hidden;
  transition: var(--transition);
}

.advantage-card:hover {
  transform: translateY(-5px);
  border-color: var(--border-glow);
  background: var(--bg-card-hover);
}

.advantage-icon {
  width: 54px;
  height: 54px;
  background: linear-gradient(135deg, rgba(255, 158, 0, 0.15), rgba(255, 85, 0, 0.15));
  border: 1px solid var(--border-color);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  color: var(--primary-gold);
  margin-bottom: 20px;
}

.advantage-title {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: #FFF;
}

.advantage-desc {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* Pricing Grid */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(270px, 1fr));
  gap: 24px;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--card-radius);
  padding: 36px 28px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: var(--transition);
}

.pricing-card.featured {
  border: 2px solid var(--primary-gold);
  background: rgba(30, 26, 20, 0.9);
  box-shadow: 0 10px 40px rgba(255, 158, 0, 0.25);
  transform: scale(1.03);
}

.pricing-badge {
  position: absolute;
  top: -14px;
  right: 24px;
  background: linear-gradient(135deg, var(--primary-gold), var(--primary-orange));
  color: #000;
  font-size: 0.78rem;
  font-weight: 800;
  padding: 4px 14px;
  border-radius: 20px;
  text-transform: uppercase;
}

.pricing-name {
  font-size: 1.4rem;
  font-weight: 800;
  margin-bottom: 8px;
}

.pricing-price {
  font-size: 2.5rem;
  font-weight: 900;
  color: var(--primary-gold);
  margin-bottom: 4px;
}

.pricing-price span {
  font-size: 0.95rem;
  font-weight: 400;
  color: var(--text-muted);
}

.pricing-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 24px;
}

.pricing-features {
  list-style: none;
  margin-bottom: 30px;
  flex-grow: 1;
}

.pricing-features li {
  padding: 8px 0;
  font-size: 0.92rem;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 10px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.pricing-features li::before {
  content: "✓";
  color: var(--primary-gold);
  font-weight: 900;
}

.pricing-btn {
  width: 100%;
  text-align: center;
  padding: 14px;
  border-radius: 30px;
  font-weight: 700;
  font-size: 1rem;
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition);
}

.btn-gold-card {
  background: linear-gradient(135deg, var(--primary-gold), var(--primary-orange));
  color: #000;
  border: none;
  box-shadow: 0 4px 15px var(--gold-glow);
}

.btn-gold-card:hover {
  box-shadow: 0 8px 25px rgba(255, 158, 0, 0.5);
  transform: translateY(-2px);
}

.btn-outline-card {
  background: transparent;
  border: 1px solid var(--border-color);
  color: #FFF;
}

.btn-outline-card:hover {
  border-color: var(--primary-gold);
  color: var(--primary-gold);
  background: rgba(255, 158, 0, 0.1);
}

/* Articles & Knowledge Base Grid */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 24px;
}

.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--card-radius);
  padding: 26px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition);
  text-decoration: none;
  color: inherit;
}

.article-card:hover {
  transform: translateY(-5px);
  border-color: var(--primary-gold);
  background: var(--bg-card-hover);
  box-shadow: 0 10px 30px rgba(255, 158, 0, 0.15);
}

.article-tag {
  display: inline-block;
  background: rgba(255, 158, 0, 0.15);
  color: var(--primary-gold);
  font-size: 0.8rem;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: 14px;
  align-self: flex-start;
}

.article-card-title {
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 12px;
  color: #FFF;

  /* Line clamp */
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-card-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 20px;
  line-height: 1.5;

  /* Line clamp */
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  color: var(--primary-gold);
  font-weight: 600;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 14px;
}

/* User Testimonials Grid */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}

.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--card-radius);
  padding: 26px;
  transition: var(--transition);
}

.review-card:hover {
  border-color: var(--border-glow);
}

.review-user {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 16px;
}

.user-avatar {
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary-gold), var(--primary-orange));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  color: #000;
}

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

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

.review-stars {
  color: var(--primary-gold);
  margin-bottom: 12px;
  font-size: 0.95rem;
}

.review-text {
  font-size: 0.92rem;
  color: var(--text-main);
  line-height: 1.6;
}

/* FAQ Accordion Grid */
.faq-grid {
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-width: 900px;
  margin: 0 auto;
}

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

.faq-header {
  padding: 20px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  font-weight: 700;
  font-size: 1.05rem;
  user-select: none;
}

.faq-header:hover {
  color: var(--primary-gold);
}

.faq-icon {
  font-size: 1.2rem;
  transition: transform 0.3s ease;
  color: var(--primary-gold);
}

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

.faq-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
  padding: 0 24px;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.6;
}

.faq-card.active .faq-body {
  padding: 0 24px 20px 24px;
  max-height: 300px;
}

/* Footer */
footer {
  background: #07080B;
  border-top: 1px solid var(--border-color);
  padding: 50px 0 30px 0;
  margin-top: 60px;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 30px;
  margin-bottom: 40px;
}

.footer-brand {
  max-width: 380px;
}

.footer-brand p {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-top: 12px;
}

.footer-links-col h4 {
  font-size: 1.05rem;
  margin-bottom: 16px;
  color: var(--primary-gold);
}

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

.footer-links-col ul li {
  margin-bottom: 8px;
}

.footer-links-col ul li a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  transition: var(--transition);
}

.footer-links-col ul li a:hover {
  color: var(--primary-gold);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 24px;
  text-align: center;
  color: var(--text-dim);
  font-size: 0.85rem;
}

/* Article Detail Page Specific Styles */
.article-container {
  max-width: 900px;
  margin: 40px auto;
  padding: 0 24px;
}

.article-header-box {
  margin-bottom: 36px;
}

.article-breadcrumb {
  display: flex;
  gap: 8px;
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.article-breadcrumb a {
  color: var(--primary-gold);
  text-decoration: none;
}

.article-main-title {
  font-size: 2.4rem;
  font-weight: 900;
  line-height: 1.3;
  margin-bottom: 16px;
  color: #FFF;
}

.article-meta-info {
  display: flex;
  gap: 20px;
  font-size: 0.88rem;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 20px;
}

.article-content {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--card-radius);
  padding: 40px;
  line-height: 1.8;
  font-size: 1.05rem;
  color: var(--text-main);
}

.article-content h2 {
  font-size: 1.6rem;
  color: var(--primary-gold);
  margin: 32px 0 16px 0;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(255, 158, 0, 0.2);
}

.article-content h3 {
  font-size: 1.25rem;
  color: #FFF;
  margin: 24px 0 12px 0;
}

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

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

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

.article-content blockquote {
  background: rgba(255, 158, 0, 0.08);
  border-left: 4px solid var(--primary-gold);
  padding: 16px 20px;
  margin: 24px 0;
  border-radius: 0 12px 12px 0;
  color: #E2E8F0;
  font-style: italic;
}

.article-cta-box {
  background: linear-gradient(135deg, rgba(255, 158, 0, 0.15), rgba(255, 85, 0, 0.15));
  border: 1px solid var(--border-glow);
  border-radius: var(--card-radius);
  padding: 30px;
  text-align: center;
  margin-top: 40px;
}

/* Responsive Media Queries */
@media (max-width: 992px) {
  .hero-title { font-size: 2.5rem; }
  .hero-stats-row { grid-template-columns: repeat(2, 1fr); }
  .pricing-card.featured { transform: none; }
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .hero-title { font-size: 2rem; }
  .hero-subtitle { font-size: 1rem; }
  .hero-stats-row { grid-template-columns: 1fr 1fr; }
  .advantages-grid, .articles-grid, .pricing-grid, .reviews-grid { grid-template-columns: 1fr; }
  .article-content { padding: 24px; }
}