/* ==========================================================================
   宇宙云 (Cosmic Cloud) - 纯白商务简洁原生 CSS 样式系统
   Business Minimalist Theme | Pure White | Mobile-First Responsive
   ========================================================================== */

:root {
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-card: #ffffff;
  --bg-card-hover: #ffffff;
  
  --primary-glow: #2563eb;       /* Professional Royal Blue */
  --primary-accent: #1d4ed8;
  --secondary-glow: #0284c7;     /* Sky Blue */
  --accent-neon: #7c3aed;         /* Purple Accent */
  
  --text-main: #0f172a;          /* Slate 900 */
  --text-muted: #334155;         /* Slate 700 */
  --text-subtle: #64748b;        /* Slate 500 */
  --text-dim: #94a3b8;           /* Slate 400 */
  
  --border-color: #e2e8f0;       /* Crisp light border */
  --border-glow: rgba(37, 99, 235, 0.35);
  
  --gradient-cosmic: linear-gradient(135deg, #1e40af 0%, #2563eb 50%, #7c3aed 100%);
  --gradient-text: linear-gradient(135deg, #0f172a 0%, #1e293b 60%, #2563eb 100%);
  --gradient-button: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
  --gradient-button-hover: linear-gradient(135deg, #1d4ed8 0%, #1e40af 100%);
  
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-full: 9999px;
  
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --shadow-card: 0 4px 20px rgba(15, 23, 42, 0.06);
  --shadow-glow: 0 12px 30px rgba(37, 99, 235, 0.14);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-main);
  font-family: var(--font-family);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
}

/* Background Soft Accents */
.bg-glow-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.bg-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(140px);
  opacity: 0.08;
}

.bg-orb-1 {
  top: -10%;
  left: 15%;
  width: 500px;
  height: 500px;
  background: var(--primary-glow);
}

.bg-orb-2 {
  top: 40%;
  right: -10%;
  width: 600px;
  height: 600px;
  background: var(--secondary-glow);
}

/* Typography & Utilities */
a {
  color: inherit;
  text-decoration: none;
}

.container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 1.5rem;
  position: relative;
  z-index: 1;
}

.gradient-text {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.cosmic-text {
  background: var(--gradient-cosmic);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 1rem;
  border-radius: var(--radius-full);
  background: rgba(37, 99, 235, 0.06);
  border: 1px solid rgba(37, 99, 235, 0.2);
  color: var(--primary-glow);
  font-size: 0.85rem;
  font-weight: 600;
}

.badge-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: #10b981;
  box-shadow: 0 0 8px #10b981;
  animation: pulseGreen 2s infinite ease-in-out;
}

@keyframes pulseGreen {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.3); opacity: 0.7; }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 0.85rem 1.8rem;
  font-size: 0.98rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: var(--transition);
  cursor: pointer;
  border: none;
  outline: none;
  white-space: nowrap;
}

.btn-primary {
  background: var(--gradient-button);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.25);
}

.btn-primary:hover {
  background: var(--gradient-button-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 22px rgba(37, 99, 235, 0.4);
}

.btn-secondary {
  background: #f1f5f9;
  color: var(--text-main);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background: #e2e8f0;
  border-color: #cbd5e1;
  transform: translateY(-2px);
}

.btn-lg {
  padding: 1rem 2.2rem;
  font-size: 1.05rem;
  border-radius: var(--radius-md);
}

.btn-block {
  width: 100%;
}

/* Header & Nav Menu */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -0.5px;
}

.logo-img {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid rgba(37, 99, 235, 0.4);
  box-shadow: 0 0 12px rgba(37, 99, 235, 0.2);
  transition: var(--transition);
}

.logo:hover .logo-img {
  transform: scale(1.08) rotate(4deg);
  border-color: var(--primary-glow);
  box-shadow: 0 0 18px rgba(37, 99, 235, 0.4);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2.25rem;
  list-style: none;
}

.nav-link {
  color: var(--text-muted);
  font-size: 0.95rem;
  font-weight: 600;
  transition: var(--transition);
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0%;
  height: 2px;
  background: var(--primary-glow);
  transition: var(--transition);
}

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

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

/* Hero Section (Left & Right Split Layout) */
.hero {
  padding: 4.5rem 0 4rem;
  background: radial-gradient(circle at 70% 30%, rgba(37, 99, 235, 0.04) 0%, transparent 60%);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 3.5rem;
  align-items: center;
}

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

.hero-headline {
  font-size: 3.25rem;
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -1px;
  margin: 1.25rem 0 1.25rem;
  color: var(--text-main);
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-muted);
  margin-bottom: 2.25rem;
  line-height: 1.65;
  font-weight: 400;
}

.hero-cta {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  margin-bottom: 2.5rem;
  flex-wrap: wrap;
}

.hero-stats-row {
  display: flex;
  align-items: center;
  gap: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-color);
}

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

.stat-num {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--text-main);
}

.stat-label {
  font-size: 0.82rem;
  color: var(--text-subtle);
  font-weight: 500;
}

/* Hero Right: Dynamic Tech Card (动态图卡) */
.hero-right {
  position: relative;
}

.hero-dynamic-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  box-shadow: 0 15px 35px rgba(15, 23, 42, 0.08);
  animation: floatCard 6s ease-in-out infinite;
  position: relative;
  overflow: hidden;
}

.hero-dynamic-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-cosmic);
}

@keyframes floatCard {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-8px); }
}

.card-header-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 1.25rem;
}

.card-status-title {
  font-size: 0.95rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-main);
}

.status-badge-live {
  background: #dcfce7;
  color: #166534;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-full);
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.node-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}

.node-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: #f8fafc;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 0.65rem 0.85rem;
  font-size: 0.88rem;
  font-weight: 500;
  transition: var(--transition);
}

.node-item:hover {
  background: #f1f5f9;
  border-color: #cbd5e1;
}

.node-info {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.node-ping {
  font-family: monospace;
  font-size: 0.85rem;
  font-weight: 700;
  color: #059669;
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

.speed-meter-box {
  background: #f8fafc;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 0.85rem;
}

.meter-header {
  display: flex;
  justify-content: space-between;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 0.4rem;
}

.meter-bar-track {
  height: 8px;
  background: #e2e8f0;
  border-radius: var(--radius-full);
  overflow: hidden;
  position: relative;
}

.meter-bar-fill {
  height: 100%;
  width: 86%;
  background: var(--gradient-cosmic);
  border-radius: var(--radius-full);
  position: relative;
}

/* Floating Tech Chips around card */
.chip-floating {
  position: absolute;
  background: #ffffff;
  border: 1px solid var(--border-color);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.08);
  border-radius: var(--radius-full);
  padding: 0.4rem 0.85rem;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 0.4rem;
  z-index: 2;
}

.chip-1 {
  top: -15px;
  right: 20px;
  animation: floatChip1 5s ease-in-out infinite;
}

.chip-2 {
  bottom: -15px;
  left: 20px;
  animation: floatChip2 5.5s ease-in-out infinite;
}

@keyframes floatChip1 {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}

@keyframes floatChip2 {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(6px); }
}

/* Section Header */
.section-header {
  text-align: center;
  max-width: 650px;
  margin: 0 auto 3.5rem;
}

.section-title {
  font-size: 2.25rem;
  font-weight: 800;
  margin-bottom: 0.75rem;
  letter-spacing: -0.5px;
  color: var(--text-main);
}

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

/* Core Advantages Grid (3 Cards) */
.features {
  padding: 5rem 0;
  background: #ffffff;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2.25rem 2rem;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-cosmic);
  opacity: 0;
  transition: var(--transition);
}

.feature-card:hover {
  transform: translateY(-6px);
  border-color: rgba(37, 99, 235, 0.4);
  box-shadow: 0 15px 35px rgba(37, 99, 235, 0.12);
}

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

.feature-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  background: rgba(37, 99, 235, 0.08);
  border: 1px solid rgba(37, 99, 235, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-glow);
}

.feature-icon svg {
  width: 28px;
  height: 28px;
}

.feature-title {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-main);
}

.feature-text {
  color: var(--text-muted);
  font-size: 0.98rem;
  line-height: 1.6;
}

/* Ecosystem & AI Card Section */
.ecosystem {
  padding: 4rem 0 5rem;
}

.ecosystem-card {
  background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 3.5rem 3rem;
  box-shadow: var(--shadow-card);
  position: relative;
  overflow: hidden;
}

.ecosystem-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.ecosystem-block-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--text-main);
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.tag-item {
  padding: 0.55rem 1.1rem;
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.02);
  transition: var(--transition);
}

.tag-item:hover {
  background: #eff6ff;
  border-color: #93c5fd;
  color: var(--primary-glow);
  transform: scale(1.03);
}

/* Pricing Section (7 Official Real Tiers matching UI screenshots) */
.pricing {
  padding: 5rem 0;
  background: #ffffff;
}

.pricing-tabs {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 3rem;
  flex-wrap: wrap;
}

.tab-btn {
  padding: 0.65rem 1.4rem;
  border-radius: var(--radius-full);
  background: #f1f5f9;
  border: 1px solid var(--border-color);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-muted);
  cursor: pointer;
  transition: var(--transition);
}

.tab-btn:hover, .tab-btn.active {
  background: var(--gradient-button);
  color: #ffffff;
  border-color: transparent;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.3);
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.pricing-card-official {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2.25rem 2rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition);
  position: relative;
  box-shadow: var(--shadow-card);
}

.pricing-card-official.popular {
  border: 2px solid var(--primary-glow);
  box-shadow: 0 12px 32px rgba(37, 99, 235, 0.16);
  background: linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
}

.card-top-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.78rem;
  font-weight: 700;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  margin-bottom: 1rem;
  width: fit-content;
}

.tag-recommend {
  background: #eff6ff;
  color: #2563eb;
  border: 1px solid #bfdbfe;
}

.tag-featured {
  background: #1e1b4b;
  color: #ffffff;
}

.plan-title-official {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1.25;
}

.plan-subtitle-official {
  font-size: 0.88rem;
  color: var(--text-subtle);
  margin-top: 0.3rem;
}

.price-box-official {
  background: #f8fafc;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  margin: 1.5rem 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.price-offer-label {
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.8px;
  color: var(--text-dim);
  text-transform: uppercase;
}

.price-amount-official {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--primary-glow);
  line-height: 1;
}

.price-unit {
  font-size: 0.9rem;
  color: var(--text-subtle);
  font-weight: 500;
}

.price-avail-box {
  text-align: right;
}

.price-avail-label {
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.8px;
  color: var(--text-dim);
  text-transform: uppercase;
}

.price-avail-val {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text-main);
  margin-top: 0.2rem;
}

/* 3 Specs Blocks */
.specs-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.6rem;
  margin-bottom: 1.25rem;
}

.spec-chip {
  background: #f8fafc;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 0.65rem 0.5rem;
  text-align: center;
}

.spec-chip-label {
  font-size: 0.75rem;
  color: var(--text-subtle);
  margin-bottom: 0.2rem;
}

.spec-chip-val {
  font-size: 0.95rem;
  font-weight: 800;
  color: var(--text-main);
}

.cycle-pills {
  display: flex;
  gap: 0.4rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

.pill-item {
  font-size: 0.78rem;
  font-weight: 600;
  padding: 0.25rem 0.7rem;
  border-radius: var(--radius-full);
  background: #f1f5f9;
  color: var(--text-muted);
  border: 1px solid var(--border-color);
}

.official-features-list {
  list-style: none;
  margin-bottom: 2rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  border-top: 1px dashed var(--border-color);
  padding-top: 1.25rem;
}

.official-feature-item {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.official-feature-item svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  margin-top: 0.25rem;
  color: #059669;
}

/* Coupon Banner & Copy Badge Styles */
.coupon-banner-section {
  padding: 2rem 0;
  background: #ffffff;
}

.coupon-banner-card {
  background: linear-gradient(135deg, #f5f3ff 0%, #eff6ff 100%);
  border: 2px dashed #818cf8;
  border-radius: var(--radius-lg);
  padding: 1.75rem 2.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  box-shadow: 0 8px 24px rgba(99, 102, 241, 0.1);
  position: relative;
  overflow: hidden;
  flex-wrap: wrap;
}

.coupon-banner-left {
  flex: 1;
  min-width: 300px;
}

.coupon-banner-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: #1e1b4b;
  margin-bottom: 0.4rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

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

.coupon-code-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: #ffffff;
  border: 1px solid #c7d2fe;
  color: #4f46e5;
  font-family: monospace;
  font-size: 1.05rem;
  font-weight: 800;
  padding: 0.2rem 0.75rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
  box-shadow: 0 2px 6px rgba(79, 70, 229, 0.1);
  user-select: all;
  margin: 0 0.2rem;
}

.coupon-code-badge:hover {
  background: #4f46e5;
  color: #ffffff;
  border-color: #4f46e5;
  transform: scale(1.05);
}

.btn-coupon-claim {
  background: linear-gradient(135deg, #7c3aed 0%, #4f46e5 100%);
  color: #ffffff;
  font-weight: 700;
  padding: 0.85rem 2rem;
  border-radius: var(--radius-md);
  box-shadow: 0 4px 16px rgba(124, 58, 237, 0.3);
  transition: var(--transition);
}

.btn-coupon-claim:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(124, 58, 237, 0.45);
}

/* Toast Popup Notification */
#toast-popup {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: #0f172a;
  color: #ffffff;
  padding: 0.85rem 1.75rem;
  border-radius: var(--radius-full);
  font-size: 0.95rem;
  font-weight: 700;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
  display: flex;
  align-items: center;
  gap: 0.6rem;
  z-index: 1000;
  opacity: 0;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  pointer-events: none;
  border: 1px solid rgba(255, 255, 255, 0.15);
}

#toast-popup.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

/* SEO Articles Grid Section */
.articles-section {
  padding: 5rem 0;
  background: #f8fafc;
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.article-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition);
  box-shadow: var(--shadow-card);
  position: relative;
  overflow: hidden;
}

.article-card:hover {
  transform: translateY(-5px);
  border-color: rgba(37, 99, 235, 0.4);
  box-shadow: 0 12px 30px rgba(37, 99, 235, 0.12);
}

.article-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}

.article-card-tag {
  font-size: 0.78rem;
  font-weight: 700;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  background: #eff6ff;
  color: var(--primary-glow);
  border: 1px solid #bfdbfe;
}

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

.article-card-title {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1.4;
  margin-bottom: 0.75rem;
  transition: var(--transition);
}

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

.article-card-excerpt {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 1.5rem;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid #f1f5f9;
  padding-top: 1rem;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--primary-glow);
}

/* User Testimonials Section */
.testimonials {
  padding: 5rem 0;
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.75rem;
}

.testimonial-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 1.25rem;
  box-shadow: var(--shadow-card);
  transition: var(--transition);
}

.testimonial-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.08);
}

.testimonial-text {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.6;
  font-style: italic;
}

.testimonial-user {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.user-avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--gradient-cosmic);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: #fff;
  font-size: 1rem;
}

.user-info-name {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-main);
}

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

/* FAQ Section */
.faq {
  padding: 5rem 0;
  background: #ffffff;
}

.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.02);
}

.faq-item[open] {
  border-color: rgba(37, 99, 235, 0.4);
  background: #f8fafc;
}

.faq-title {
  padding: 1.25rem 1.5rem;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-main);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  list-style: none;
  user-select: none;
}

.faq-title::-webkit-details-marker {
  display: none;
}

.faq-title-icon {
  width: 20px;
  height: 20px;
  transition: transform 0.3s ease;
  color: var(--primary-glow);
}

.faq-item[open] .faq-title-icon {
  transform: rotate(180deg);
}

.faq-content {
  padding: 0 1.5rem 1.25rem;
  color: var(--text-muted);
  font-size: 0.98rem;
  line-height: 1.65;
  border-top: 1px solid var(--border-color);
  padding-top: 1rem;
}

/* Footer (Strict 4 Columns Link Section) */
.footer {
  background: #f8fafc;
  border-top: 1px solid var(--border-color);
  padding: 3.5rem 0 2.5rem;
  position: relative;
  z-index: 1;
}

.footer-nav {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 3.5rem;
  margin-bottom: 2.5rem;
  flex-wrap: wrap;
}

.footer-link {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-muted);
  transition: var(--transition);
  position: relative;
}

.footer-link:hover {
  color: var(--primary-glow);
  transform: translateY(-2px);
}

.footer-copyright {
  text-align: center;
  font-size: 0.88rem;
  color: var(--text-subtle);
  border-top: 1px solid var(--border-color);
  padding-top: 2rem;
  font-weight: 500;
}

/* Subpage Layout Styles */
.page-hero {
  padding: 4.5rem 0 2.5rem;
  text-align: center;
  background: radial-gradient(circle at 50% 20%, rgba(37, 99, 235, 0.04) 0%, transparent 70%);
}

.page-title {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 1rem;
  color: var(--text-main);
}

.page-subtitle {
  color: var(--text-muted);
  font-size: 1.1rem;
  max-width: 600px;
  margin: 0 auto;
}

.content-box {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 3rem;
  margin-bottom: 4rem;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.04);
}

.content-box h2 {
  font-size: 1.5rem;
  font-weight: 800;
  margin: 2.25rem 0 1rem;
  color: var(--text-main);
  border-bottom: 2px solid #f1f5f9;
  padding-bottom: 0.5rem;
}

.content-box h2:first-child {
  margin-top: 0;
}

.content-box p {
  color: var(--text-muted);
  margin-bottom: 1.15rem;
  line-height: 1.75;
  font-size: 1.02rem;
}

.content-box ul {
  margin: 1rem 0 1.5rem 1.5rem;
  color: var(--text-muted);
}

.content-box li {
  margin-bottom: 0.6rem;
  line-height: 1.7;
  font-size: 1rem;
}

.highlight-card {
  background: rgba(37, 99, 235, 0.06);
  border: 1px solid rgba(37, 99, 235, 0.2);
  border-radius: var(--radius-md);
  padding: 1.25rem 1.5rem;
  margin: 1.5rem 0;
  color: #1e40af;
  font-weight: 500;
  line-height: 1.65;
}

/* Responsive Media Queries */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
  .hero-left {
    text-align: center;
  }
  .hero-cta {
    justify-content: center;
  }
  .hero-stats-row {
    justify-content: center;
  }
  .features-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
  }
  .testimonials-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .hero-headline {
    font-size: 2.35rem;
  }
  .hero-subtitle {
    font-size: 1.05rem;
  }
  .features-grid {
    grid-template-columns: 1fr;
  }
  .ecosystem-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  .pricing-grid {
    grid-template-columns: 1fr;
  }
  .testimonials-grid {
    grid-template-columns: 1fr;
  }
  .footer-nav {
    gap: 1.5rem;
    flex-direction: column;
  }
  .nav-links {
    display: none;
  }
  .hero-stats-row {
    flex-direction: column;
    gap: 1rem;
    align-items: center;
  }
  .content-box {
    padding: 1.75rem 1.25rem;
  }
}