/* ==========================================================================
   WgetCloud Wiki - Corporate Design System & Stylesheet
   Style: Corporate Professional (Figure 1: #1E60F3 Blue & Clean Card Layout)
   Pricing: Figure 2 cyan/teal accents & 3-card balanced layout
   ========================================================================== */

:root {
  --primary: #1E60F3;
  --primary-hover: #164ed1;
  --primary-light: #EBF2FE;
  --primary-glow: rgba(30, 96, 243, 0.25);
  
  --cyan-primary: #00A8CC;
  --cyan-hover: #0093b3;
  --cyan-outline: #00B4D8;
  --cyan-light: #E0F7FA;
  
  --bg-main: #F8FAFC;
  --bg-card: #FFFFFF;
  --bg-card-hover: #FFFFFF;
  --bg-subtle: #F1F5F9;
  
  --text-primary: #0F172A;
  --text-secondary: #475569;
  --text-muted: #94A3B8;
  --text-inverse: #FFFFFF;
  
  --border-color: #E2E8F0;
  --border-light: #F1F5F9;
  --border-focus: #1E60F3;
  
  --success: #10B981;
  --warning: #F59E0B;
  --danger: #EF4444;
  
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -1px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.03);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.09), 0 10px 10px -5px rgba(0, 0, 0, 0.03);
  --shadow-card: 0 12px 32px -4px rgba(15, 23, 42, 0.06);
  --shadow-blue: 0 12px 28px -6px rgba(30, 96, 243, 0.35);
  
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;
  
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  
  --container-max: 1240px;
}

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

html {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-main);
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  position: relative;
}

/* Background Dynamic Accents */
.bg-grid-pattern {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 780px;
  background-image: 
    radial-gradient(circle at 50% 8%, rgba(30, 96, 243, 0.08) 0%, transparent 60%),
    linear-gradient(to right, rgba(226, 232, 240, 0.4) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(226, 232, 240, 0.4) 1px, transparent 1px);
  background-size: 100% 100%, 48px 48px, 48px 48px;
  pointer-events: none;
  z-index: 0;
}

.ambient-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
  z-index: 0;
}

.glow-top-right {
  top: -100px;
  right: -50px;
  width: 480px;
  height: 480px;
  background: radial-gradient(circle, rgba(0, 168, 204, 0.15) 0%, rgba(30, 96, 243, 0.05) 70%, transparent 100%);
}

.glow-mid-left {
  top: 600px;
  left: -150px;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(30, 96, 243, 0.1) 0%, transparent 70%);
}

/* Container */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
  position: relative;
  z-index: 1;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  color: var(--text-primary);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.02em;
}

h1 { font-size: 2.75rem; }
h2 { font-size: 2.15rem; }
h3 { font-size: 1.45rem; }
h4 { font-size: 1.15rem; }

p {
  color: var(--text-secondary);
  font-size: 1.025rem;
  line-height: 1.75;
}

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

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

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 600;
  font-size: 1rem;
  padding: 13px 26px;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: all var(--transition-normal);
  white-space: nowrap;
  user-select: none;
}

.btn-primary {
  background: var(--primary);
  color: var(--text-inverse);
  box-shadow: var(--shadow-blue);
}

.btn-primary:hover {
  background: var(--primary-hover);
  color: var(--text-inverse);
  transform: translateY(-2px);
  box-shadow: 0 14px 32px -4px rgba(30, 96, 243, 0.45);
}

.btn-cyan-solid {
  background: var(--cyan-primary);
  color: var(--text-inverse);
  box-shadow: 0 8px 20px -3px rgba(0, 168, 204, 0.35);
}

.btn-cyan-solid:hover {
  background: var(--cyan-hover);
  color: var(--text-inverse);
  transform: translateY(-2px);
  box-shadow: 0 12px 24px -3px rgba(0, 168, 204, 0.45);
}

.btn-cyan-outline {
  background: transparent;
  color: var(--cyan-outline);
  border: 1.5px solid var(--cyan-outline);
}

.btn-cyan-outline:hover {
  background: var(--cyan-light);
  color: var(--cyan-hover);
  border-color: var(--cyan-hover);
  transform: translateY(-2px);
}

.btn-secondary {
  background: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
  background: var(--bg-subtle);
  border-color: var(--text-muted);
  color: var(--text-primary);
  transform: translateY(-1px);
}

.btn-sm {
  padding: 8px 16px;
  font-size: 0.875rem;
  border-radius: var(--radius-sm);
}

.btn-lg {
  padding: 16px 36px;
  font-size: 1.125rem;
  border-radius: var(--radius-lg);
}

.btn-icon-right svg {
  transition: transform var(--transition-fast);
}

.btn:hover .btn-icon-right svg {
  transform: translateX(3px);
}

/* Badges & Tags */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  font-size: 0.8125rem;
  font-weight: 600;
  border-radius: var(--radius-full);
}

.badge-primary {
  background: var(--primary-light);
  color: var(--primary);
  border: 1px solid rgba(30, 96, 243, 0.2);
}

.badge-success {
  background: rgba(16, 185, 129, 0.1);
  color: var(--success);
  border: 1px solid rgba(16, 185, 129, 0.25);
}

.badge-hot {
  background: linear-gradient(135deg, #00C2FF 0%, #0084FF 100%);
  color: #FFFFFF;
  padding: 4px 14px;
  font-size: 0.8125rem;
  font-weight: 700;
  box-shadow: 0 4px 10px rgba(0, 168, 255, 0.35);
  letter-spacing: 0.05em;
}

.pulse-dot {
  width: 8px;
  height: 8px;
  background-color: var(--success);
  border-radius: 50%;
  display: inline-block;
  position: relative;
}

.pulse-dot::after {
  content: "";
  position: absolute;
  top: -4px;
  left: -4px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background-color: var(--success);
  opacity: 0.5;
  animation: pulseAnimation 2s infinite;
}

@keyframes pulseAnimation {
  0% { transform: scale(0.5); opacity: 0.8; }
  100% { transform: scale(1.6); opacity: 0; }
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-color);
  transition: all var(--transition-normal);
}

.site-header.scrolled {
  box-shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.06);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 74px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.logo-icon {
  width: 38px;
  height: 38px;
  background: var(--primary);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  box-shadow: 0 4px 12px rgba(30, 96, 243, 0.3);
}

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

.logo-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.logo-title span {
  color: var(--primary);
}

.logo-tag {
  font-size: 0.725rem;
  color: var(--text-muted);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.nav-link {
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
  position: relative;
  padding: 6px 0;
}

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

.nav-link.active::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
}

.header-cta {
  display: flex;
  align-items: center;
  gap: 12px;
}

.mobile-menu-btn {
  display: none;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 8px;
  color: var(--text-primary);
}

/* ==========================================================================
   Hero Section (Inspired by Figure 1 Corporate Style)
   ========================================================================== */
.hero-section {
  padding: 64px 0 60px;
  position: relative;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
  align-items: center;
}

.hero-content {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.hero-title {
  font-size: 3.1rem;
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -0.03em;
  color: var(--text-primary);
}

.hero-title .gradient-text {
  background: linear-gradient(135deg, var(--primary) 0%, #00A8CC 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.18rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-top: 8px;
  flex-wrap: wrap;
}

.hero-meta {
  display: flex;
  align-items: center;
  gap: 24px;
  margin-top: 12px;
  padding-top: 20px;
  border-top: 1px solid var(--border-color);
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.hero-meta-item {
  display: flex;
  align-items: center;
  gap: 8px;
}

.hero-meta-item svg {
  color: var(--primary);
}

/* Hero Preview Card - Matching Figure 1 */
.hero-card-preview {
  position: relative;
}

.corporate-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 36px 32px;
  box-shadow: var(--shadow-xl);
  position: relative;
  transition: transform var(--transition-normal);
}

.corporate-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 25px 40px -10px rgba(15, 23, 42, 0.12);
}

.card-figure1-preview {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 18px;
}

.fig1-icon-box {
  width: 52px;
  height: 52px;
  background: var(--primary);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 6px 16px rgba(30, 96, 243, 0.35);
}

.fig1-title {
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--text-primary);
}

.fig1-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
}

.fig1-btn {
  width: 100%;
  background: var(--primary);
  color: #FFFFFF;
  font-size: 1.05rem;
  font-weight: 600;
  padding: 14px;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  box-shadow: var(--shadow-blue);
  transition: all var(--transition-normal);
}

.fig1-btn:hover {
  background: var(--primary-hover);
  color: #fff;
  transform: translateY(-2px);
}

/* Hero Network Latency Monitor Card */
.latency-monitor {
  margin-top: 20px;
  background: var(--bg-subtle);
  border-radius: var(--radius-lg);
  padding: 16px 20px;
  border: 1px solid var(--border-color);
}

.latency-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.latency-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}

.latency-node {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--bg-card);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  font-size: 0.825rem;
}

.node-name {
  display: flex;
  align-items: center;
  gap: 6px;
  font-weight: 500;
  color: var(--text-primary);
}

.node-ping {
  color: var(--success);
  font-weight: 700;
  font-family: monospace;
}

/* ==========================================================================
   Section Headers
   ========================================================================== */
.section-wrapper {
  padding: 80px 0;
  position: relative;
}

.section-alt {
  background-color: #FFFFFF;
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 52px;
}

.section-tag {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 8px;
}

.section-title {
  margin-bottom: 14px;
}

.section-desc {
  font-size: 1.1rem;
  color: var(--text-secondary);
}

/* ==========================================================================
   Selling Points Grid (Core Pillars)
   ========================================================================== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
  gap: 16px;
  box-shadow: var(--shadow-sm);
}

.feature-card:hover {
  transform: translateY(-4px);
  border-color: rgba(30, 96, 243, 0.3);
  box-shadow: var(--shadow-card);
}

.feature-icon-wrapper {
  width: 54px;
  height: 54px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 4px;
}

.feature-icon-wrapper.blue { background: rgba(30, 96, 243, 0.1); color: var(--primary); }
.feature-icon-wrapper.cyan { background: rgba(0, 168, 204, 0.1); color: var(--cyan-primary); }
.feature-icon-wrapper.green { background: rgba(16, 185, 129, 0.1); color: var(--success); }
.feature-icon-wrapper.purple { background: rgba(139, 92, 246, 0.1); color: #8B5CF6; }
.feature-icon-wrapper.amber { background: rgba(245, 158, 11, 0.1); color: var(--warning); }
.feature-icon-wrapper.indigo { background: rgba(99, 102, 241, 0.1); color: #6366F1; }

.feature-title {
  font-size: 1.25rem;
  color: var(--text-primary);
}

.feature-text {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* ==========================================================================
   Official Portal & Domain Access (官网入口)
   ========================================================================== */
.portal-box {
  background: linear-gradient(135deg, #1E293B 0%, #0F172A 100%);
  border-radius: var(--radius-xl);
  padding: 44px 40px;
  color: #FFFFFF;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 40px;
  align-items: center;
  box-shadow: var(--shadow-xl);
  border: 1px solid rgba(255, 255, 255, 0.1);
  position: relative;
  overflow: hidden;
}

.portal-box::before {
  content: "";
  position: absolute;
  top: -120px;
  right: -120px;
  width: 320px;
  height: 320px;
  background: radial-gradient(circle, rgba(30, 96, 243, 0.35) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.portal-content h3 {
  color: #FFFFFF;
  font-size: 1.85rem;
  margin-bottom: 12px;
}

.portal-content p {
  color: #CBD5E1;
  font-size: 1.05rem;
  margin-bottom: 24px;
}

.portal-links {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.portal-link-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
  padding: 12px 18px;
  border-radius: var(--radius-md);
  color: #FFFFFF;
  font-size: 0.95rem;
  transition: all var(--transition-fast);
}

.portal-link-item:hover {
  background: rgba(255, 255, 255, 0.16);
  border-color: rgba(255, 255, 255, 0.3);
  color: #FFFFFF;
  transform: translateX(4px);
}

.portal-status-badge {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  color: #34D399;
  background: rgba(16, 185, 129, 0.15);
  padding: 4px 10px;
  border-radius: var(--radius-full);
}

/* ==========================================================================
   Pricing Section (Faithfully Replicating Figure 2)
   ========================================================================== */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px 30px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-sm);
}

.pricing-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
}

/* Middle featured card with top pill and cyan border */
.pricing-card.featured {
  border: 2px solid var(--cyan-outline);
  box-shadow: 0 16px 36px -8px rgba(0, 180, 216, 0.25);
  transform: scale(1.02);
}

.pricing-card.featured:hover {
  transform: scale(1.02) translateY(-5px);
}

.card-hot-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  border-radius: 20px;
  padding: 3px 20px;
  font-size: 0.85rem;
  font-weight: 700;
  color: #FFFFFF;
  background: linear-gradient(135deg, #00C2FF 0%, #0084FF 100%);
  box-shadow: 0 4px 12px rgba(0, 194, 255, 0.4);
  letter-spacing: 0.05em;
  z-index: 2;
}

.pricing-header {
  text-align: center;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-light);
}

.plan-name {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.plan-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: 18px;
}

.plan-price-wrap {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 2px;
  margin-bottom: 4px;
}

.price-currency {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
}

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

.price-period {
  font-size: 0.95rem;
  color: var(--text-muted);
}

.pricing-action {
  margin: 24px 0;
}

.pricing-action .btn {
  width: 100%;
  padding: 13px;
  font-size: 1.05rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
}

.pricing-features-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-top: 8px;
}

.pricing-feature-item {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.935rem;
  color: var(--text-secondary);
}

.check-icon {
  width: 18px;
  height: 18px;
  color: var(--success);
  flex-shrink: 0;
}

.star-rating {
  color: #F59E0B;
  letter-spacing: 2px;
  font-size: 0.95rem;
}

/* ==========================================================================
   Client Downloads (全平台支持)
   ========================================================================== */
.clients-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.client-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  text-align: center;
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
}

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

.client-icon {
  width: 58px;
  height: 58px;
  border-radius: 16px;
  background: var(--bg-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-primary);
  transition: all var(--transition-fast);
}

.client-card:hover .client-icon {
  background: var(--primary-light);
  color: var(--primary);
}

.client-name {
  font-size: 1.15rem;
  font-weight: 700;
}

.client-support {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ==========================================================================
   AI Tools & Streaming Unlock
   ========================================================================== */
.ai-section-banner {
  background: linear-gradient(135deg, #0A192F 0%, #172A45 100%);
  border-radius: var(--radius-xl);
  padding: 48px;
  color: #FFFFFF;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 40px;
  align-items: center;
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: var(--shadow-xl);
}

.ai-content h3 {
  color: #FFFFFF;
  font-size: 2rem;
  margin-bottom: 14px;
}

.ai-content p {
  color: #CBD5E1;
  font-size: 1.05rem;
  margin-bottom: 24px;
  line-height: 1.7;
}

.ai-tools-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 28px;
}

.ai-pill {
  background: rgba(255, 255, 255, 0.1);
  padding: 7px 14px;
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 600;
  color: #FFFFFF;
  border: 1px solid rgba(255, 255, 255, 0.15);
  display: flex;
  align-items: center;
  gap: 6px;
}

.ai-feature-box {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.ai-metric-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.ai-metric-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.metric-label {
  color: #94A3B8;
  font-size: 0.9rem;
}

.metric-val {
  color: #38BDF8;
  font-weight: 700;
  font-size: 1rem;
}

/* ==========================================================================
   Knowledge Base & 9 SEO Articles Grid
   ========================================================================== */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-sm);
}

.article-card:hover {
  transform: translateY(-5px);
  border-color: rgba(30, 96, 243, 0.3);
  box-shadow: var(--shadow-card);
}

.article-card-header {
  padding: 24px 24px 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.article-tag {
  align-self: flex-start;
}

.article-card-title {
  font-size: 1.18rem;
  line-height: 1.4;
  color: var(--text-primary);
  font-weight: 700;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

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

.article-card-body {
  padding: 0 24px 20px;
  flex-grow: 1;
}

.article-excerpt {
  font-size: 0.925rem;
  color: var(--text-secondary);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-card-footer {
  padding: 16px 24px;
  background: var(--bg-subtle);
  border-top: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.article-meta-read {
  display: flex;
  align-items: center;
  gap: 6px;
}

.read-more-link {
  font-weight: 600;
  color: var(--primary);
  display: flex;
  align-items: center;
  gap: 4px;
}

/* ==========================================================================
   FAQ Accordion
   ========================================================================== */
.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-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all var(--transition-fast);
}

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

.faq-question {
  width: 100%;
  padding: 20px 24px;
  background: transparent;
  border: none;
  text-align: left;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
  gap: 16px;
}

.faq-icon {
  width: 22px;
  height: 22px;
  color: var(--text-muted);
  transition: transform var(--transition-fast);
  flex-shrink: 0;
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease-out, padding 0.3s ease-out;
  padding: 0 24px;
}

.faq-item.active .faq-answer {
  max-height: 600px;
  padding: 0 24px 20px;
}

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

/* ==========================================================================
   Article Detail Page Layout & Typography
   ========================================================================== */
.article-page-layout {
  padding: 40px 0 80px;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 24px;
  flex-wrap: wrap;
}

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

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

.article-main-grid {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 48px;
  align-items: start;
}

.article-content-wrapper {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 48px 44px;
  box-shadow: var(--shadow-sm);
}

.article-header {
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 28px;
  margin-bottom: 36px;
}

.article-page-title {
  font-size: 2.2rem;
  font-weight: 800;
  line-height: 1.3;
  margin-top: 14px;
  margin-bottom: 18px;
  color: var(--text-primary);
}

.article-meta-bar {
  display: flex;
  align-items: center;
  gap: 20px;
  font-size: 0.9rem;
  color: var(--text-muted);
  flex-wrap: wrap;
}

.article-body h2 {
  font-size: 1.65rem;
  margin-top: 40px;
  margin-bottom: 18px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--primary-light);
  color: var(--text-primary);
  scroll-margin-top: 100px;
}

.article-body h3 {
  font-size: 1.3rem;
  margin-top: 28px;
  margin-bottom: 12px;
  color: var(--text-primary);
  scroll-margin-top: 100px;
}

.article-body p {
  margin-bottom: 20px;
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--text-secondary);
}

.article-body ul, .article-body ol {
  margin: 16px 0 24px 24px;
  color: var(--text-secondary);
}

.article-body li {
  margin-bottom: 10px;
  font-size: 1.025rem;
  line-height: 1.7;
}

.article-body strong {
  color: var(--text-primary);
}

.article-callout {
  background: var(--primary-light);
  border-left: 4px solid var(--primary);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: 20px 24px;
  margin: 28px 0;
}

.article-callout.warning {
  background: #FFFBEB;
  border-left-color: var(--warning);
}

.article-callout.success {
  background: #ECFDF5;
  border-left-color: var(--success);
}

.article-callout p {
  margin-bottom: 0;
  color: var(--text-primary);
  font-weight: 500;
}

.article-table-wrap {
  overflow-x: auto;
  margin: 28px 0;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
}

.article-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.95rem;
}

.article-table th {
  background: var(--bg-subtle);
  color: var(--text-primary);
  font-weight: 700;
  padding: 14px 18px;
  border-bottom: 1px solid var(--border-color);
}

.article-table td {
  padding: 14px 18px;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-secondary);
}

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

.article-table tr:hover td {
  background: rgba(248, 250, 252, 0.8);
}

/* Article Sidebar */
.article-sidebar {
  position: sticky;
  top: 98px;
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.sidebar-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-sm);
}

.sidebar-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 8px;
}

.toc-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.toc-link {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.4;
  display: block;
  padding-left: 10px;
  border-left: 2px solid transparent;
  transition: all var(--transition-fast);
}

.toc-link:hover, .toc-link.active {
  color: var(--primary);
  border-left-color: var(--primary);
  font-weight: 600;
}

.sidebar-cta-card {
  background: linear-gradient(135deg, var(--primary) 0%, #104ECB 100%);
  color: #FFFFFF;
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  text-align: center;
  box-shadow: var(--shadow-blue);
}

.sidebar-cta-card h4 {
  color: #FFFFFF;
  font-size: 1.25rem;
  margin-bottom: 8px;
}

.sidebar-cta-card p {
  color: rgba(255, 255, 255, 0.88);
  font-size: 0.9rem;
  margin-bottom: 18px;
}

.sidebar-cta-card .btn {
  width: 100%;
  background: #FFFFFF;
  color: var(--primary);
}

.sidebar-cta-card .btn:hover {
  background: #F8FAFC;
  transform: translateY(-2px);
}

.internal-links-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.internal-link-item a {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.4;
  transition: color var(--transition-fast);
}

.internal-link-item a:hover {
  color: var(--primary);
}

.internal-link-item svg {
  flex-shrink: 0;
  margin-top: 3px;
  color: var(--primary);
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  background: #0F172A;
  color: #94A3B8;
  padding: 68px 0 32px;
  border-top: 1px solid #1E293B;
  margin-top: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 48px;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.footer-brand .logo-title {
  color: #FFFFFF;
}

.footer-brand p {
  color: #94A3B8;
  font-size: 0.925rem;
  line-height: 1.7;
}

.footer-col h4 {
  color: #FFFFFF;
  font-size: 1.05rem;
  margin-bottom: 18px;
  font-weight: 700;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-link {
  color: #94A3B8;
  font-size: 0.9rem;
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: #FFFFFF;
}

.footer-seo-keywords {
  padding: 24px 0;
  border-top: 1px solid #1E293B;
  border-bottom: 1px solid #1E293B;
  margin-bottom: 24px;
}

.footer-seo-title {
  color: #CBD5E1;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 10px;
}

.footer-keywords-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.footer-kw-tag {
  font-size: 0.775rem;
  color: #64748B;
  background: rgba(255, 255, 255, 0.04);
  padding: 4px 8px;
  border-radius: 4px;
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  color: #64748B;
  flex-wrap: wrap;
  gap: 16px;
}

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

/* ==========================================================================
   Floating Action Button / Dynamic Widget
   ========================================================================== */
.floating-widget {
  position: fixed;
  bottom: 28px;
  right: 28px;
  z-index: 99;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.float-cta-btn {
  background: var(--primary);
  color: #FFFFFF;
  padding: 12px 20px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 0.95rem;
  box-shadow: 0 10px 25px rgba(30, 96, 243, 0.4);
  transition: all var(--transition-normal);
  text-decoration: none;
}

.float-cta-btn:hover {
  background: var(--primary-hover);
  color: #FFFFFF;
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 14px 30px rgba(30, 96, 243, 0.5);
}

.back-to-top {
  width: 44px;
  height: 44px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-primary);
  cursor: pointer;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-fast);
  opacity: 0;
  visibility: hidden;
  align-self: flex-end;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  background: var(--bg-subtle);
  transform: translateY(-2px);
}

/* ==========================================================================
   Responsive Media Queries
   ========================================================================== */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  
  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 480px;
    margin: 0 auto;
  }
  
  .pricing-card.featured {
    transform: none;
  }
  
  .pricing-card.featured:hover {
    transform: translateY(-5px);
  }
  
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .clients-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .portal-box, .ai-section-banner {
    grid-template-columns: 1fr;
    padding: 36px 28px;
  }
  
  .articles-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .article-main-grid {
    grid-template-columns: 1fr;
  }
  
  .article-sidebar {
    position: static;
  }
  
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  h1 { font-size: 2.1rem; }
  h2 { font-size: 1.7rem; }
  
  .hero-title {
    font-size: 2.2rem;
  }
  
  .nav-menu {
    display: none;
  }
  
  .mobile-menu-btn {
    display: block;
  }
  
  .features-grid, .articles-grid {
    grid-template-columns: 1fr;
  }
  
  .clients-grid {
    grid-template-columns: 1fr;
  }
  
  .article-content-wrapper {
    padding: 28px 20px;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
  }
}