/* 神龙云 (shenlong.cyou) Master Stylesheet - Clean White & Cyan Modern Theme */

:root {
  --bg-dark: #ffffff;
  --bg-section-alt: #f8fafc;
  --bg-card: #ffffff;
  --bg-card-hover: #f1f5f9;
  --accent-primary: #0284c7;
  --accent-primary-hover: #0369a1;
  --accent-secondary: #0d9488;
  --accent-gold: #d97706;
  --accent-gold-hover: #b45309;
  --accent-purple: #7c3aed;
  --text-main: #0f172a;
  --text-muted: #475569;
  --text-light: #64748b;
  --border-color: #e2e8f0;
  --border-highlight: #cbd5e1;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
  --shadow-card: 0 10px 30px -5px rgba(15, 23, 42, 0.08);
  --shadow-glow: 0 10px 25px -5px rgba(2, 132, 199, 0.25);
}

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

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;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--bg-dark);
}

a {
  color: inherit;
  text-decoration: none;
  transition: all 0.25s ease;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Typography & Helpers */
.gradient-text {
  background: linear-gradient(135deg, #0f172a 0%, #0284c7 50%, #0d9488 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.gradient-text-gold {
  background: linear-gradient(135deg, #b45309 0%, #d97706 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.section-title {
  font-size: 2.25rem;
  font-weight: 800;
  text-align: center;
  margin-bottom: 12px;
  letter-spacing: -0.02em;
  color: var(--text-main);
}

.section-subtitle {
  text-align: center;
  color: var(--text-muted);
  font-size: 1.05rem;
  margin-bottom: 48px;
  max-width: 680px;
  margin-left: auto;
  margin-right: auto;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 22px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  text-align: center;
}

.btn-primary {
  background: linear-gradient(135deg, #0284c7 0%, #0369a1 100%);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(2, 132, 199, 0.35);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #0369a1 0%, #075985 100%);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(2, 132, 199, 0.45);
}

.btn-secondary {
  background-color: #ffffff;
  color: var(--text-main);
  border-color: var(--border-color);
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
  background-color: var(--bg-section-alt);
  border-color: var(--border-highlight);
  transform: translateY(-2px);
}

.btn-recommend {
  background: linear-gradient(135deg, #d97706 0%, #b45309 100%);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(217, 119, 6, 0.35);
}

.btn-recommend:hover {
  background: linear-gradient(135deg, #b45309 0%, #92400e 100%);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(217, 119, 6, 0.45);
}

.btn-lg {
  padding: 14px 28px;
  font-size: 1.05rem;
  border-radius: var(--radius-md);
}

/* Header Navbar */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  padding: 14px 0;
}

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

.brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: -0.01em;
}

.brand-logo img {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  object-fit: cover;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-muted);
}

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* Dragon Title Box & Cloud Dragon Decorations */
.dragon-title-box {
  position: relative;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.95) 0%, rgba(240, 249, 255, 0.9) 100%);
  border: 2px solid rgba(2, 132, 199, 0.35);
  border-radius: var(--radius-lg);
  padding: 28px 32px;
  margin-bottom: 24px;
  box-shadow: 0 12px 35px -8px rgba(2, 132, 199, 0.18), inset 0 0 20px rgba(2, 132, 199, 0.04);
  backdrop-filter: blur(8px);
}

.dragon-title-box::before {
  content: '🐉 祥龙驾云';
  position: absolute;
  top: -14px;
  left: 28px;
  background: linear-gradient(135deg, #0284c7 0%, #0d9488 100%);
  color: #ffffff;
  font-size: 0.82rem;
  font-weight: 800;
  padding: 3px 16px;
  border-radius: 20px;
  letter-spacing: 0.05em;
  box-shadow: 0 4px 10px rgba(2, 132, 199, 0.3);
}

.dragon-title-box::after {
  content: '🐉';
  position: absolute;
  bottom: -16px;
  right: 24px;
  font-size: 1.8rem;
  filter: drop-shadow(0 4px 6px rgba(0,0,0,0.15));
  animation: dragonPulse 3s infinite ease-in-out;
}

.dragon-title-box h1 {
  font-size: 2.8rem;
  font-weight: 900;
  line-height: 1.25;
  letter-spacing: -0.02em;
  margin: 0;
}

.dragon-badge-corner {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--accent-primary);
  background: rgba(2, 132, 199, 0.08);
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: 12px;
}

/* Hero Floating Cloud with Dragon on Top */
.hero-section {
  position: relative;
  overflow: hidden;
}

.floating-cloud-dragon {
  position: absolute;
  z-index: 10;
  pointer-events: none;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  animation: floatCloudDragon 4s ease-in-out infinite alternate;
}

.floating-cloud-dragon.cloud-left {
  top: 40px;
  left: 15px;
}

.floating-cloud-dragon.cloud-right {
  bottom: 30px;
  right: 20px;
  animation-delay: 2s;
}

.dragon-on-cloud-graphic {
  background: rgba(255, 255, 255, 0.95);
  border: 1.5px solid rgba(2, 132, 199, 0.3);
  border-radius: 40px;
  padding: 10px 20px;
  box-shadow: 0 10px 25px rgba(2, 132, 199, 0.15);
  display: flex;
  align-items: center;
  gap: 10px;
  backdrop-filter: blur(6px);
}

.cloud-icon-base {
  font-size: 2rem;
  line-height: 1;
  position: relative;
}

.dragon-top-figure {
  font-size: 2.2rem;
  margin-top: -12px;
  filter: drop-shadow(0 4px 8px rgba(2, 132, 199, 0.3));
}

.cloud-dragon-text {
  font-size: 0.88rem;
  font-weight: 800;
  color: var(--accent-primary);
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.cloud-dragon-text span {
  font-size: 0.72rem;
  color: var(--text-muted);
  font-weight: 600;
}

@keyframes floatCloudDragon {
  0% {
    transform: translateY(0px) rotate(0deg);
  }
  100% {
    transform: translateY(-16px) rotate(2deg);
  }
}

@keyframes dragonPulse {
  0%, 100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.15) rotate(8deg);
  }
}

.hero-content .subtitle {
  font-size: 1.15rem;
  color: var(--text-muted);
  margin-bottom: 32px;
  line-height: 1.7;
}

.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 32px;
}

.badge-item {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  background-color: var(--bg-section-alt);
  border: 1px solid var(--border-color);
  border-radius: 30px;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-muted);
}

.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 24px;
}

.hero-note {
  font-size: 0.9rem;
  color: var(--text-light);
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Hero Card Preview */
.hero-card-wrapper {
  display: flex;
  justify-content: center;
}

.hero-card-preview {
  width: 100%;
  max-width: 440px;
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-card);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero-card-preview::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, #0284c7, #0d9488, #d97706);
}

.orb-display {
  width: 80px;
  height: 80px;
  margin: 0 auto 20px;
  background: rgba(2, 132, 199, 0.08);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.speed-meter {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-top: 28px;
  padding-top: 24px;
  border-top: 1px dashed var(--border-color);
}

.meter-stat {
  display: flex;
  flex-direction: column;
}

.meter-val {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--accent-primary);
}

.meter-lbl {
  font-size: 0.78rem;
  color: var(--text-light);
  margin-top: 2px;
}

/* Features Section */
.features-section {
  padding: 80px 0;
  background-color: var(--bg-section-alt);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.feature-card {
  background: #ffffff;
  padding: 32px 24px;
  border-radius: var(--radius-md);
  border: 1.5px solid var(--border-color);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.feature-card::after {
  content: '🐉';
  position: absolute;
  top: 14px;
  right: 14px;
  font-size: 1.3rem;
  opacity: 0.2;
  transition: all 0.3s ease;
}

.feature-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 25px rgba(2, 132, 199, 0.12);
  border-color: var(--accent-primary);
}

.feature-card:hover::after {
  opacity: 0.85;
  transform: scale(1.15) rotate(-10deg);
}

.feature-icon {
  font-size: 2.2rem;
  margin-bottom: 16px;
}

.feature-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.feature-card p {
  color: var(--text-muted);
  font-size: 0.93rem;
  line-height: 1.6;
}

/* Pricing Section */
.pricing-section {
  padding: 90px 0;
}

.pricing-coupon-banner {
  max-width: 680px;
  margin: -24px auto 40px;
  background: rgba(2, 132, 199, 0.06);
  border: 1px dashed var(--accent-primary);
  border-radius: var(--radius-md);
  padding: 14px 20px;
  text-align: center;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  font-size: 0.95rem;
  color: var(--text-main);
}

.coupon-code {
  font-family: monospace;
  background: #ffffff;
  padding: 4px 10px;
  border-radius: 6px;
  border: 1px solid var(--accent-primary);
  font-weight: 700;
  color: var(--accent-primary);
  user-select: all;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 28px;
  align-items: stretch;
}

.pricing-card {
  background: #ffffff;
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
  transition: all 0.3s ease;
}

.pricing-card::after {
  content: '🐉';
  position: absolute;
  bottom: 16px;
  right: 16px;
  font-size: 1.5rem;
  opacity: 0.2;
  transition: all 0.3s ease;
}

.pricing-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 14px 35px rgba(2, 132, 199, 0.15);
}

.pricing-card:hover::after {
  opacity: 0.9;
  transform: scale(1.2) rotate(8deg);
}

.pricing-card.popular {
  border: 2px solid var(--accent-primary);
  box-shadow: var(--shadow-glow);
}

.popular-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, #0284c7, #0369a1);
  color: #ffffff;
  font-size: 0.8rem;
  font-weight: 700;
  padding: 4px 16px;
  border-radius: 20px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.plan-title {
  font-size: 1.3rem;
  font-weight: 800;
  margin-bottom: 6px;
}

.plan-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 20px;
  min-height: 42px;
}

.plan-price {
  font-size: 2.5rem;
  font-weight: 900;
  color: var(--text-main);
  margin-bottom: 24px;
}

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

.plan-features {
  list-style: none;
  margin-bottom: 32px;
  flex-grow: 1;
}

.plan-features li {
  font-size: 0.92rem;
  color: var(--text-muted);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.plan-features li span {
  color: var(--accent-primary);
  font-weight: 700;
}

/* Articles Grid Section */
.articles-section {
  padding: 80px 0;
  background-color: var(--bg-section-alt);
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}

.article-card {
  background: #ffffff;
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
  transition: all 0.3s ease;
}

.article-card::before {
  content: '🐉';
  position: absolute;
  top: 14px;
  right: 14px;
  font-size: 1.4rem;
  opacity: 0.25;
  transition: all 0.3s ease;
}

.article-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 12px 30px rgba(2, 132, 199, 0.15);
  border-color: var(--accent-primary);
}

.article-card:hover::before {
  opacity: 0.9;
  transform: scale(1.2) rotate(12deg);
}

.article-tag {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--accent-primary);
  text-transform: uppercase;
  margin-bottom: 10px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: rgba(2, 132, 199, 0.06);
  padding: 3px 10px;
  border-radius: 12px;
  width: fit-content;
}

.article-tag::before {
  content: '🐉';
  font-size: 0.85rem;
}

.article-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 12px;
  padding-left: 10px;
  border-left: 3px solid var(--accent-primary);
}

.article-excerpt {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 20px;
  flex-grow: 1;
}

.article-link {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--accent-primary);
  display: flex;
  align-items: center;
  gap: 6px;
}

.article-link:hover {
  color: var(--accent-primary-hover);
  gap: 10px;
}

/* Reviews Section */
.reviews-section {
  padding: 80px 0;
}

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

.review-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 28px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
}

.review-stars {
  color: #f59e0b;
  font-size: 1.1rem;
  margin-bottom: 12px;
}

.review-text {
  font-size: 0.93rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 20px;
  flex-grow: 1;
}

.review-user {
  display: flex;
  align-items: center;
  gap: 12px;
}

.user-avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--bg-section-alt);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: var(--accent-primary);
  border: 1px solid var(--border-color);
}

.user-info h4 {
  font-size: 0.95rem;
  font-weight: 700;
}

.user-info p {
  font-size: 0.8rem;
  color: var(--text-light);
}

/* FAQ Section */
.faq-section {
  padding: 80px 0;
  background-color: var(--bg-section-alt);
}

.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
}

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

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

.faq-icon {
  font-size: 0.8rem;
  transition: transform 0.3s ease;
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s cubic-bezier(0, 1, 0, 1);
  background-color: #fafafa;
  border-top: 1px solid transparent;
}

.faq-item.active .faq-answer {
  max-height: 500px;
  transition: max-height 0.35s ease-in-out;
  border-top-color: var(--border-color);
}

.faq-answer p {
  padding: 20px 24px;
  font-size: 0.93rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* Article Page Layout */
.article-page {
  padding: 50px 0 80px;
}

.breadcrumb {
  font-size: 0.88rem;
  color: var(--text-light);
  margin-bottom: 30px;
  display: flex;
  gap: 8px;
  align-items: center;
}

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

.article-body {
  max-width: 860px;
  margin: 0 auto;
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 48px;
  box-shadow: var(--shadow-sm);
}

.article-header h1 {
  font-size: 2.2rem;
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 16px;
}

.article-post-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.85rem;
  color: var(--text-light);
  padding-bottom: 24px;
  margin-bottom: 32px;
  border-bottom: 1px solid var(--border-color);
}

.article-body p {
  font-size: 1.02rem;
  line-height: 1.8;
  color: #334155;
  margin-bottom: 24px;
}

.article-body h2 {
  font-size: 1.5rem;
  font-weight: 800;
  margin: 36px 0 16px;
  color: var(--text-main);
  padding-left: 12px;
  border-left: 4px solid var(--accent-primary);
}

.article-body h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin: 28px 0 12px;
  color: var(--text-main);
}

.article-body ul, .article-body ol {
  margin-bottom: 24px;
  padding-left: 24px;
  color: #334155;
  line-height: 1.8;
}

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

.article-body a {
  color: var(--accent-primary);
  font-weight: 600;
  text-decoration: underline;
}

.article-cta-box {
  margin: 40px 0;
  padding: 32px;
  background: radial-gradient(circle at 50% 0%, rgba(2, 132, 199, 0.08) 0%, rgba(248, 250, 252, 0.9) 100%);
  border: 1px solid var(--accent-primary);
  border-radius: var(--radius-md);
  text-align: center;
}

.article-cta-box h3 {
  font-size: 1.35rem;
  font-weight: 800;
  margin-bottom: 10px;
}

.article-cta-box p {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-bottom: 20px;
}

/* Footer Section (Core Task 2: PBN Footprint links) */
.site-footer {
  margin-top: auto;
  background-color: #0f172a;
  color: #94a3b8;
  padding: 50px 0 30px;
  border-top: 1px solid #1e293b;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 20px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.2rem;
  font-weight: 800;
  color: #ffffff;
}

.footer-brand img {
  width: 32px;
  height: 32px;
  border-radius: 6px;
}

.footer-copy {
  font-size: 0.88rem;
  color: #64748b;
}

/* PBN Dofollow Links (Core Task 2 Requirement) */
.footer-pbn-links {
  margin-top: 10px;
  padding-top: 16px;
  border-top: 1px solid #1e293b;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  font-size: 0.82rem;
  color: #64748b;
}

.footer-pbn-links a {
  color: #94a3b8;
  transition: color 0.2s ease;
}

.footer-pbn-links a:hover {
  color: #38bdf8;
  text-decoration: underline;
}

/* Responsive Media Queries */
@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-content h1 {
    font-size: 2.4rem;
  }

  .hero-badges, .hero-ctas, .hero-note {
    justify-content: center;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    display: none;
  }

  .article-body {
    padding: 24px;
  }

  .article-header h1 {
    font-size: 1.75rem;
  }
}