/* ==========================================================================
   灯塔云机场 (dengtayun.cyou) - 官方落地页与知识库主样式表
   主题：深海夜空与灯塔金曦（Cyber Deep Ocean & Luminous Beacon）
   ========================================================================== */

:root {
  --bg-dark: #070c18;
  --bg-dark-card: #0e172a;
  --bg-dark-card-hover: #16223b;
  --bg-glass: rgba(14, 23, 42, 0.75);
  
  --primary-sky: #38bdf8;
  --primary-blue: #0284c7;
  --primary-indigo: #2563eb;
  --accent-gold: #f59e0b;
  --accent-amber: #d97706;
  --accent-cyan: #06b6d4;
  --accent-green: #10b981;
  --accent-rose: #f43f5e;

  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-sub: #cbd5e1;

  --border-color: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(56, 189, 248, 0.3);
  --border-gold-glow: rgba(245, 158, 11, 0.4);

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --transition-fast: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  font-family: var(--font-sans);
  background-color: var(--bg-dark);
  color: var(--text-main);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

body {
  overflow-x: hidden;
  background: radial-gradient(circle at 50% 0%, rgba(2, 132, 199, 0.18) 0%, rgba(7, 12, 24, 1) 70%);
  min-height: 100vh;
}

a {
  color: var(--primary-sky);
  text-decoration: none;
  transition: all var(--transition-fast);
}

a:hover {
  color: #7dd3fc;
}

img, svg {
  vertical-align: middle;
}

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

.section-padding {
  padding: 80px 0;
}

.text-gradient {
  background: linear-gradient(135deg, #38bdf8, #60a5fa, #fbbf24);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.text-gold-gradient {
  background: linear-gradient(135deg, #fbbf24, #f59e0b, #d97706);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Header & Nav */
.header-nav {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(7, 12, 24, 0.85);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-color);
  height: 72px;
  display: flex;
  align-items: center;
}

.nav-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.logo-link {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-icon {
  width: 36px;
  height: 36px;
  filter: drop-shadow(0 0 10px rgba(56, 189, 248, 0.5));
}

.logo-text-box {
  display: flex;
  flex-direction: column;
}

.logo-title {
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  color: #fff;
  display: flex;
  align-items: center;
  gap: 6px;
}

.logo-tag {
  font-size: 0.65rem;
  padding: 2px 6px;
  border-radius: 4px;
  background: linear-gradient(90deg, #0284c7, #2563eb);
  color: #fff;
  font-weight: 600;
  letter-spacing: 0.5px;
}

.logo-domain {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 500;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 26px;
  list-style: none;
}

.nav-links a {
  color: var(--text-sub);
  font-weight: 500;
  font-size: 0.95rem;
  position: relative;
  padding: 6px 0;
}

.nav-links a:hover {
  color: #fff;
}

.nav-links a::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary-sky);
  transition: width var(--transition-fast);
}

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

.nav-cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 20px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, #0284c7, #2563eb);
  color: #fff !important;
  font-weight: 600;
  font-size: 0.9rem;
  box-shadow: 0 4px 14px rgba(2, 132, 199, 0.4);
  transition: all var(--transition-fast);
}

.nav-cta-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(2, 132, 199, 0.6);
  background: linear-gradient(135deg, #0369a1, #1d4ed8);
}

/* Mobile Toggle */
.mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: #fff;
  font-size: 1.6rem;
  cursor: pointer;
  padding: 4px;
}

/* Mobile Drawer */
.mobile-drawer {
  position: fixed;
  top: 72px;
  left: 0;
  width: 100%;
  background: rgba(7, 12, 24, 0.98);
  border-bottom: 1px solid var(--border-color);
  padding: 24px;
  display: none;
  flex-direction: column;
  gap: 16px;
  z-index: 999;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.8);
}

.mobile-drawer.active {
  display: flex;
}

.mobile-drawer a {
  font-size: 1.05rem;
  padding: 10px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  color: var(--text-sub);
}

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

/* 3D Luminous Lighthouse Mascot Image */
.hero-mascot-wrapper {
  margin-bottom: 24px;
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-mascot-img {
  width: 175px;
  height: 175px;
  object-fit: cover;
  border-radius: 36px;
  background: #0e172a;
  border: 3px solid rgba(56, 189, 248, 0.45);
  outline: 3px solid rgba(245, 158, 11, 0.35);
  box-shadow: 0 16px 40px -8px rgba(2, 132, 199, 0.5), 0 0 30px rgba(56, 189, 248, 0.3);
  animation: floatLighthouse 4s ease-in-out infinite;
  transition: transform 0.35s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.35s ease;
  cursor: pointer;
}

.hero-mascot-img:hover {
  transform: scale(1.08) rotate(2deg);
  box-shadow: 0 20px 48px -6px rgba(2, 132, 199, 0.7), 0 0 45px rgba(245, 158, 11, 0.5);
}

@keyframes floatLighthouse {
  0%, 100% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-9px);
  }
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(56, 189, 248, 0.1);
  border: 1px solid rgba(56, 189, 248, 0.25);
  padding: 6px 18px;
  border-radius: 30px;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--primary-sky);
  margin-bottom: 24px;
  box-shadow: 0 0 20px rgba(56, 189, 248, 0.15);
}

.hero-title {
  font-size: 3.2rem;
  line-height: 1.22;
  font-weight: 800;
  margin-bottom: 22px;
  letter-spacing: -1px;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-muted);
  max-width: 820px;
  margin: 0 auto 36px;
  line-height: 1.75;
}

.hero-subtitle strong {
  color: var(--text-main);
  font-weight: 600;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  flex-wrap: wrap;
  margin-bottom: 50px;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 34px;
  background: linear-gradient(135deg, #0284c7 0%, #2563eb 100%);
  color: #fff !important;
  font-weight: 600;
  font-size: 1.05rem;
  border-radius: var(--radius-md);
  box-shadow: 0 4px 20px rgba(2, 132, 199, 0.45);
  transition: all var(--transition-fast);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(2, 132, 199, 0.6);
  background: linear-gradient(135deg, #0369a1 0%, #1d4ed8 100%);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 30px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  color: var(--text-main) !important;
  font-weight: 600;
  font-size: 1.05rem;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--border-glow);
  transform: translateY(-2px);
}

/* Metrics Row */
.metrics-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-top: 20px;
}

.metric-box {
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 22px 16px;
  text-align: center;
  transition: all var(--transition-fast);
}

.metric-box:hover {
  border-color: var(--border-glow);
  transform: translateY(-3px);
  background: var(--bg-dark-card-hover);
}

.metric-num {
  font-size: 2.1rem;
  font-weight: 800;
  color: #fff;
  font-family: var(--font-sans);
  margin-bottom: 4px;
}

.metric-label {
  font-size: 0.88rem;
  color: var(--text-muted);
}

/* Section Header */
.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 50px;
}

.section-tag {
  display: inline-block;
  font-size: 0.8rem;
  text-transform: uppercase;
  font-weight: 700;
  letter-spacing: 1.5px;
  color: var(--accent-gold);
  margin-bottom: 8px;
}

.section-title {
  font-size: 2.4rem;
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 14px;
}

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

/* Real-time Node Ping Monitor */
.ping-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 18px;
}

.ping-item {
  background: var(--bg-dark-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 18px 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: all var(--transition-fast);
}

.ping-item:hover {
  border-color: var(--border-glow);
  background: var(--bg-dark-card-hover);
}

.ping-info {
  display: flex;
  align-items: center;
  gap: 14px;
}

.ping-flag {
  font-size: 1.8rem;
}

.ping-name {
  font-size: 1rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 3px;
}

.ping-detail {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.ping-badge {
  text-align: right;
  min-width: 90px;
}

.ping-val {
  display: inline-block;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--accent-green);
  margin-bottom: 4px;
}

.ping-bar-bg {
  width: 90px;
  height: 5px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 4px;
  overflow: hidden;
}

.ping-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, #10b981, #38bdf8);
  border-radius: 4px;
}

/* Bento Features Grid */
.bento-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.bento-card {
  background: var(--bg-dark-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  position: relative;
  overflow: hidden;
  transition: all var(--transition-fast);
}

.bento-card:hover {
  border-color: var(--border-glow);
  transform: translateY(-4px);
  background: var(--bg-dark-card-hover);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.4);
}

.bento-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--primary-sky), transparent);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.bento-card:hover::before {
  opacity: 1;
}

.bento-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  background: rgba(56, 189, 248, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin-bottom: 20px;
  color: var(--primary-sky);
  border: 1px solid rgba(56, 189, 248, 0.2);
}

.bento-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 12px;
}

.bento-card p {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.7;
}

.bento-card p strong {
  color: var(--text-sub);
}

/* Pricing Grid */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-dark-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 34px 26px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  transition: all var(--transition-fast);
}

.pricing-card:hover {
  border-color: var(--border-glow);
  transform: translateY(-5px);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.5);
}

.pricing-card.popular {
  border-color: var(--accent-gold);
  background: linear-gradient(180deg, rgba(245, 158, 11, 0.08) 0%, rgba(14, 23, 42, 0.95) 100%);
  box-shadow: 0 8px 30px rgba(245, 158, 11, 0.15);
  transform: scale(1.03);
}

.pricing-card.popular:hover {
  transform: scale(1.03) translateY(-5px);
  box-shadow: 0 16px 40px rgba(245, 158, 11, 0.25);
}

.popular-tag {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(90deg, #f59e0b, #d97706);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 16px;
  border-radius: 20px;
  letter-spacing: 0.5px;
  white-space: nowrap;
  box-shadow: 0 4px 12px rgba(245, 158, 11, 0.4);
}

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

.plan-subtitle {
  font-size: 0.85rem;
  color: var(--text-muted);
  min-height: 40px;
  line-height: 1.4;
  margin-bottom: 20px;
}

.plan-price-box {
  margin-bottom: 24px;
  padding-bottom: 20px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.plan-price {
  font-size: 2.3rem;
  font-weight: 900;
  color: #fff;
  line-height: 1;
}

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

.plan-features {
  list-style: none;
  margin-bottom: 30px;
}

.plan-features li {
  font-size: 0.9rem;
  color: var(--text-sub);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.plan-features li svg {
  width: 16px;
  height: 16px;
  color: var(--primary-sky);
  flex-shrink: 0;
}

/* Comparison Table Section */
.comp-wrapper {
  background: var(--bg-dark-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow-x: auto;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.comp-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.comp-table th, .comp-table td {
  padding: 18px 24px;
  border-bottom: 1px solid var(--border-color);
}

.comp-table th {
  background: rgba(255, 255, 255, 0.02);
  font-size: 1.05rem;
  font-weight: 700;
  color: #fff;
}

.comp-table tr:last-child td {
  border-bottom: none;
}

.comp-good {
  color: #38bdf8;
  font-weight: 600;
}

.comp-bad {
  color: #ef4444;
}

/* Articles Hub Section */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.article-card {
  background: var(--bg-dark-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 26px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all var(--transition-fast);
}

.article-card:hover {
  border-color: var(--border-glow);
  transform: translateY(-4px);
  background: var(--bg-dark-card-hover);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.4);
}

.article-meta-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.article-badge {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 20px;
  background: rgba(56, 189, 248, 0.12);
  color: var(--primary-sky);
  border: 1px solid rgba(56, 189, 248, 0.2);
}

.article-date {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.article-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: #fff;
  line-height: 1.45;
  margin-bottom: 12px;
}

.article-card p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 20px;
}

.article-link {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--primary-sky);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.article-link:hover {
  gap: 10px;
  color: #7dd3fc;
}

/* User Reviews Section */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.testimonial-card {
  background: var(--bg-dark-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 30px 26px;
  transition: all var(--transition-fast);
}

.testimonial-card:hover {
  border-color: var(--border-glow);
  transform: translateY(-3px);
  background: var(--bg-dark-card-hover);
}

.testimonial-stars {
  color: #fbbf24;
  font-size: 1.1rem;
  margin-bottom: 16px;
  letter-spacing: 2px;
}

.testimonial-text {
  font-size: 0.95rem;
  color: var(--text-sub);
  line-height: 1.7;
  margin-bottom: 24px;
  font-style: normal;
}

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

.user-avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: linear-gradient(135deg, #0284c7, #38bdf8);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: #fff;
  font-size: 1.1rem;
}

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

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

/* FAQ Accordion */
.faq-wrapper {
  max-width: 860px;
  margin: 0 auto;
}

.faq-item {
  background: var(--bg-dark-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  margin-bottom: 14px;
  overflow: hidden;
  transition: all var(--transition-fast);
}

.faq-item:hover {
  border-color: var(--border-glow);
}

.faq-question {
  padding: 22px 26px;
  font-size: 1.08rem;
  font-weight: 700;
  color: #fff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  user-select: none;
}

.faq-toggle-icon {
  font-size: 1.2rem;
  color: var(--primary-sky);
  transition: transform var(--transition-fast);
}

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

.faq-answer {
  padding: 0 26px 24px;
  font-size: 0.96rem;
  color: var(--text-sub);
  line-height: 1.75;
  display: none;
}

.faq-item.active .faq-answer {
  display: block;
}

.faq-answer strong {
  color: var(--text-main);
}

/* Footer & PBN Backlink Pipeline */
footer {
  background: #040810;
  border-top: 1px solid var(--border-color);
  padding: 60px 0 30px;
  margin-top: 60px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 50px;
}

.footer-col-desc .logo-link {
  margin-bottom: 16px;
}

.footer-col-desc p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.7;
  max-width: 340px;
}

.footer-col h5 {
  font-size: 1rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 18px;
}

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

.footer-col ul li {
  margin-bottom: 10px;
}

.footer-col ul li a {
  font-size: 0.88rem;
  color: var(--text-muted);
}

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

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 12px;
}

.footer-bottom p {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* PBN Friend Links Styling */
.footer-friend-links {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  font-size: 0.8rem;
  color: rgba(148, 163, 184, 0.65);
}

.footer-friend-links span.label {
  color: rgba(148, 163, 184, 0.5);
}

.footer-friend-links a {
  color: rgba(148, 163, 184, 0.7);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-friend-links a:hover {
  color: var(--primary-sky);
}

/* ==========================================================================
   Article Detail Page Specific Styles
   ========================================================================== */
.article-header {
  padding: 50px 0 30px;
  text-align: left;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.breadcrumb a {
  color: var(--text-muted);
}

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

.article-main-title {
  font-size: 2.4rem;
  font-weight: 800;
  line-height: 1.35;
  margin-bottom: 18px;
  color: #fff;
}

.article-header-meta {
  display: flex;
  align-items: center;
  gap: 18px;
  font-size: 0.88rem;
  color: var(--text-muted);
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-color);
}

.article-layout {
  display: grid;
  grid-template-columns: 2.8fr 1.2fr;
  gap: 40px;
  padding: 40px 0 80px;
}

.article-content {
  background: var(--bg-dark-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 40px;
  font-size: 1.02rem;
  color: var(--text-sub);
  line-height: 1.85;
}

.article-content h2 {
  font-size: 1.6rem;
  font-weight: 800;
  color: #fff;
  margin: 36px 0 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.article-content h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: #f1f5f9;
  margin: 26px 0 12px;
}

.article-content p {
  margin-bottom: 18px;
}

.article-content ul, .article-content ol {
  margin: 16px 0 20px 24px;
}

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

.article-content strong {
  color: #fff;
  font-weight: 700;
}

.article-content blockquote {
  background: rgba(56, 189, 248, 0.06);
  border-left: 4px solid var(--primary-sky);
  padding: 14px 20px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 22px 0;
  color: #e2e8f0;
}

.article-cta-box {
  background: linear-gradient(135deg, rgba(2, 132, 199, 0.15) 0%, rgba(37, 99, 235, 0.15) 100%);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-md);
  padding: 28px;
  margin: 36px 0;
  text-align: center;
}

.article-cta-box h4 {
  font-size: 1.3rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: 10px;
}

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

.article-sidebar {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

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

.sidebar-card h4 {
  font-size: 1.1rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  padding-bottom: 10px;
}

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

.sidebar-links li {
  margin-bottom: 12px;
}

.sidebar-links a {
  font-size: 0.9rem;
  color: var(--text-sub);
  display: block;
  line-height: 1.5;
}

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

/* Responsive Media Queries */
@media (max-width: 1080px) {
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .bento-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .articles-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .testimonials-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  .article-layout {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .nav-links, .nav-cta-btn {
    display: none;
  }
  .mobile-toggle {
    display: block;
  }
  .hero-title {
    font-size: 2.2rem;
  }
  .hero-subtitle {
    font-size: 1rem;
  }
  .metrics-row {
    grid-template-columns: repeat(2, 1fr);
  }
  .bento-grid {
    grid-template-columns: 1fr;
  }
  .pricing-grid {
    grid-template-columns: 1fr;
  }
  .pricing-card.popular {
    transform: none;
  }
  .pricing-card.popular:hover {
    transform: translateY(-4px);
  }
  .articles-grid {
    grid-template-columns: 1fr;
  }
  .testimonials-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }
  .article-content {
    padding: 22px 18px;
  }
  .article-main-title {
    font-size: 1.8rem;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 1.85rem;
  }
  .metrics-row {
    grid-template-columns: 1fr;
  }
  .section-title {
    font-size: 1.8rem;
  }
}

/* ==========================================================================
   客户端下载弹窗 (Download & Purchase Guidance Modal)
   ========================================================================== */
body.modal-open {
  overflow: hidden !important;
}

.download-modal {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-fast), visibility var(--transition-fast);
  padding: 16px;
}

.download-modal.is-active {
  opacity: 1;
  visibility: visible;
}

.download-modal-overlay {
  position: absolute;
  inset: 0;
  background: rgba(4, 8, 18, 0.82);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.download-modal-dialog {
  position: relative;
  z-index: 10;
  width: 100%;
  max-width: 580px;
  max-height: 90vh;
  overflow-y: auto;
  background: linear-gradient(180deg, #0e172a 0%, #070c18 100%);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  box-shadow: 0 25px 60px -10px rgba(0, 0, 0, 0.8), 0 0 35px rgba(56, 189, 248, 0.15);
  transform: scale(0.94) translateY(12px);
  transition: transform 0.28s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.download-modal.is-active .download-modal-dialog {
  transform: scale(1) translateY(0);
}

.modal-close-btn {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid var(--border-color);
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-muted);
  font-size: 20px;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-fast);
}

.modal-close-btn:hover {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  border-color: var(--primary-sky);
  transform: rotate(90deg);
}

.modal-header {
  text-align: center;
  margin-bottom: 20px;
  padding-right: 12px;
}

.modal-icon-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  border-radius: 16px;
  background: radial-gradient(circle, rgba(56, 189, 248, 0.25) 0%, rgba(2, 132, 199, 0.05) 100%);
  border: 1px solid var(--border-glow);
  font-size: 26px;
  margin-bottom: 12px;
  box-shadow: 0 0 20px rgba(56, 189, 248, 0.2);
}

.modal-title {
  font-size: 1.45rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: 6px;
  line-height: 1.35;
}

.modal-subtitle {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.modal-plan-banner {
  background: rgba(56, 189, 248, 0.08);
  border: 1px dashed rgba(56, 189, 248, 0.35);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  margin-bottom: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 0.9rem;
  color: var(--primary-sky);
}

.modal-plan-banner .plan-tip-icon {
  font-size: 1.1rem;
}

.modal-plan-banner .modal-plan-target {
  font-weight: 700;
  color: #fff;
}

.modal-platforms-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 22px;
}

.modal-platform-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 14px 18px;
  background: rgba(14, 23, 42, 0.85);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-main);
  text-decoration: none;
  transition: var(--transition-fast);
}

.modal-platform-item:hover,
.modal-platform-item.is-detected-device {
  background: rgba(56, 189, 248, 0.08);
  border-color: var(--primary-sky);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(56, 189, 248, 0.15);
}

.modal-platform-item.is-detected-device {
  border-color: var(--accent-gold);
}

.modal-platform-icon {
  font-size: 28px;
  flex-shrink: 0;
  width: 42px;
  height: 42px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.04);
  border-radius: var(--radius-sm);
}

.modal-platform-info {
  flex-grow: 1;
  min-width: 0;
}

.modal-platform-name {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 1rem;
  color: #fff;
  margin-bottom: 2px;
}

.platform-badge {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 1px 7px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--accent-gold), var(--accent-amber));
  color: #070c18;
}

.modal-platform-desc {
  font-size: 0.82rem;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.modal-platform-btn {
  flex-shrink: 0;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--primary-sky);
  padding: 6px 12px;
  background: rgba(56, 189, 248, 0.1);
  border: 1px solid rgba(56, 189, 248, 0.25);
  border-radius: var(--radius-sm);
  transition: var(--transition-fast);
}

.modal-platform-item:hover .modal-platform-btn {
  background: var(--primary-sky);
  color: #070c18;
}

.modal-footer-guide {
  border-top: 1px solid var(--border-color);
  padding-top: 18px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.modal-guide-text {
  line-height: 1.6;
  margin-bottom: 12px;
}

.modal-guide-text strong {
  color: var(--primary-sky);
}

.modal-footer-links {
  text-align: center;
}

.modal-doc-link {
  color: var(--accent-gold);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: var(--transition-fast);
}

.modal-doc-link:hover {
  color: #fff;
  text-decoration: underline;
}

/* ==========================================================================
   下载中心独立页面样式 (Download Center Page Styles)
   ========================================================================== */
.download-page-hero {
  padding: 60px 0 40px;
  text-align: center;
}

.download-page-hero .hero-pill {
  margin-bottom: 20px;
}

.download-platforms-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-top: 36px;
}

.download-platform-card-full {
  position: relative;
  background: var(--bg-dark-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 30px 26px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition-fast);
}

.download-platform-card-full:hover,
.download-platform-card-full.is-detected-device {
  border-color: var(--primary-sky);
  transform: translateY(-4px);
  box-shadow: 0 12px 30px rgba(56, 189, 248, 0.15);
}

.download-platform-card-full.is-detected-device {
  border-color: var(--accent-gold);
  box-shadow: 0 12px 30px rgba(245, 158, 11, 0.15);
}

.platform-top-badge {
  position: absolute;
  top: 18px;
  right: 20px;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--primary-sky);
  background: rgba(56, 189, 248, 0.1);
  border: 1px solid rgba(56, 189, 248, 0.25);
  padding: 2px 10px;
  border-radius: 20px;
}

.download-platform-card-full.is-detected-device .platform-top-badge {
  color: #070c18;
  background: var(--accent-gold);
  border-color: var(--accent-gold);
}

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

.platform-head-icon {
  font-size: 34px;
  width: 56px;
  height: 56px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
}

.platform-head-info h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 4px;
}

.platform-os-req {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.platform-feature-list {
  list-style: none;
  margin-bottom: 24px;
}

.platform-feature-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.92rem;
  color: var(--text-sub);
  margin-bottom: 10px;
  line-height: 1.5;
}

.platform-feature-list li svg {
  width: 18px;
  height: 18px;
  color: var(--accent-green);
  flex-shrink: 0;
  margin-top: 2px;
}

.platform-action-row {
  margin-top: auto;
}

/* Setup Steps Grid */
.setup-steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 36px;
}

.setup-step-card {
  position: relative;
  background: var(--bg-dark-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 28px 22px;
  transition: var(--transition-fast);
}

.setup-step-card:hover {
  border-color: var(--primary-sky);
  transform: translateY(-3px);
}

.setup-step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary-sky), var(--primary-blue));
  color: #070c18;
  font-weight: 800;
  font-size: 1.1rem;
  margin-bottom: 16px;
}

.setup-step-card h4 {
  font-size: 1.1rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 8px;
}

.setup-step-card p {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.6;
}

@media (max-width: 992px) {
  .download-platforms-grid {
    grid-template-columns: 1fr;
  }
  .setup-steps-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 600px) {
  .download-modal-dialog {
    padding: 24px 18px;
  }
  .modal-title {
    font-size: 1.25rem;
  }
  .setup-steps-grid {
    grid-template-columns: 1fr;
  }
  .modal-platform-desc {
    white-space: normal;
  }
}