/* ==========================================================================
   飞鸟云 FlyingBird - 2026 高转化专业原生样式表 (Option 1: Cyber Oceanic)
   ========================================================================== */

:root {
  /* Option 1: Cyber Oceanic Palette */
  --bg-primary: #080d1a;
  --bg-secondary: #0c1427;
  --bg-tertiary: #111d38;
  --bg-card: rgba(14, 22, 42, 0.82);
  --bg-card-hover: rgba(20, 32, 60, 0.92);
  
  --border-color: rgba(255, 255, 255, 0.09);
  --border-subtle: rgba(0, 229, 255, 0.15);
  --border-cyan: rgba(0, 229, 255, 0.35);
  --border-glow: rgba(0, 229, 255, 0.55);
  
  --text-main: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  
  --accent-cyan: #00e5ff;
  --accent-blue: #2563eb;
  --accent-sapphire: #1d4ed8;
  --accent-indigo: #4f46e5;
  --accent-green: #10b981;
  --accent-amber: #f59e0b;
  --accent-rose: #f43f5e;
  
  --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --container-max: 1240px;
  --transition: all 0.28s cubic-bezier(0.16, 1, 0.3, 1);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  
  --shadow-card: 0 12px 36px -8px rgba(0, 0, 0, 0.65);
  --shadow-glow: 0 0 30px rgba(0, 229, 255, 0.25);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--bg-primary);
  color: var(--text-main);
  font-family: var(--font-stack);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  min-height: 100vh;
  line-height: 1.65;
  overflow-x: hidden;
  background: radial-gradient(circle at 50% 0%, rgba(0, 229, 255, 0.12) 0%, transparent 55%),
              radial-gradient(circle at 90% 25%, rgba(37, 99, 235, 0.15) 0%, transparent 50%),
              radial-gradient(circle at 10% 65%, rgba(16, 185, 129, 0.08) 0%, transparent 50%),
              var(--bg-primary);
  background-attachment: fixed;
}

a {
  color: inherit;
  text-decoration: none;
}

img, svg {
  display: block;
  max-width: 100%;
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

/* ==========================================================================
   Header & Navbar (清晰边界 + 悬浮模糊 + 滚动置顶)
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  width: 100%;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  background: rgba(8, 13, 26, 0.88);
  /* Clear, distinct, crisp border separating nav from body */
  border-bottom: 1.5px solid rgba(0, 229, 255, 0.25);
  box-shadow: 0 8px 30px -4px rgba(0, 0, 0, 0.75), 0 1px 0 0 rgba(255, 255, 255, 0.06);
  transition: var(--transition);
}

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

.logo-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.logo-brand:hover {
  transform: translateY(-1px);
  opacity: 0.95;
}

.logo-img {
  height: 44px;
  width: auto;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 20px;
  list-style: none;
  white-space: nowrap;
}

.nav-links li {
  white-space: nowrap;
}

.nav-links a {
  font-size: 0.92rem;
  color: var(--text-secondary);
  font-weight: 500;
  transition: var(--transition);
  padding: 8px 2px;
  position: relative;
  white-space: nowrap;
}

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

.nav-links a:hover::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-cyan), var(--accent-blue));
  border-radius: 2px;
  box-shadow: 0 0 8px var(--accent-cyan);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 14px;
  white-space: nowrap;
}

/* Mobile Menu Toggle & Drawer Base (Strictly Hidden on Desktop) */
.mobile-toggle {
  display: none !important;
}

.hamburger-label {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 26px;
  height: 19px;
  cursor: pointer;
  z-index: 1002;
  margin-left: 12px;
}

.hamburger-label span {
  display: block;
  height: 2.5px;
  width: 100%;
  background: var(--text-main);
  border-radius: 2px;
  transition: transform 0.28s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.2s ease;
}

.nav-drawer {
  display: none;
}

/* ==========================================================================
   Buttons with High Visual Affordance (超清晰立体感与点击反馈)
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 11px 22px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: var(--transition);
  text-align: center;
  line-height: 1;
  white-space: nowrap;
  user-select: none;
  position: relative;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.4);
}

.btn-sm {
  padding: 8px 18px;
  font-size: 0.875rem;
}

.btn-lg {
  padding: 15px 32px;
  font-size: 1.05rem;
  font-weight: 700;
  border-radius: var(--radius-md);
}

/* Primary Button: Electric Cyan to Sapphire Gradient with Inset Depth */
.btn-primary {
  background: linear-gradient(135deg, #00d2ff 0%, #0084ff 50%, #1e40af 100%);
  color: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.3);
  box-shadow: 0 4px 16px rgba(0, 162, 255, 0.42), 
              inset 0 1px 0 rgba(255, 255, 255, 0.35),
              inset 0 -2px 0 rgba(0, 0, 0, 0.2);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #26dcff 0%, #0094ff 50%, #2563eb 100%);
  box-shadow: 0 8px 26px rgba(0, 162, 255, 0.58), 
              0 0 14px rgba(0, 229, 255, 0.45),
              inset 0 1px 0 rgba(255, 255, 255, 0.45);
  transform: translateY(-2.5px);
  color: #fff;
}

.btn-primary:active {
  transform: translateY(1px);
  box-shadow: 0 2px 8px rgba(0, 162, 255, 0.3),
              inset 0 2px 3px rgba(0, 0, 0, 0.3);
}

/* Glow Conversion Button: Vibrant Emerald & Cyan High-Affordance */
.btn-glow {
  background: linear-gradient(135deg, #00f2fe 0%, #4facfe 100%);
  color: #041226;
  font-weight: 700;
  border: 1px solid rgba(255, 255, 255, 0.6);
  box-shadow: 0 4px 18px rgba(0, 242, 254, 0.45),
              inset 0 1px 0 rgba(255, 255, 255, 0.65),
              inset 0 -2px 0 rgba(0, 0, 0, 0.15);
  text-shadow: none;
}

.btn-glow:hover {
  background: linear-gradient(135deg, #24f6ff 0%, #68b8ff 100%);
  box-shadow: 0 8px 28px rgba(0, 242, 254, 0.65),
              0 0 20px rgba(0, 229, 255, 0.5),
              inset 0 1px 0 rgba(255, 255, 255, 0.8);
  transform: translateY(-2.5px);
  color: #020914;
}

.btn-glow:active {
  transform: translateY(1px);
  box-shadow: 0 2px 8px rgba(0, 242, 254, 0.3);
}

/* Secondary Button: Solid dark surface with distinct border */
.btn-secondary {
  background: rgba(17, 28, 54, 0.85);
  border: 1.5px solid rgba(0, 229, 255, 0.35);
  color: #f1f5f9;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.4),
              inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.btn-secondary:hover {
  background: rgba(24, 40, 77, 0.95);
  border-color: var(--accent-cyan);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.5), 0 0 12px rgba(0, 229, 255, 0.25);
  transform: translateY(-2.5px);
  color: #ffffff;
}

.btn-secondary:active {
  transform: translateY(1px);
}

/* Outline Button */
.btn-outline {
  background: rgba(14, 22, 42, 0.7);
  border: 1.5px solid rgba(255, 255, 255, 0.16);
  color: #e2e8f0;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.btn-outline:hover {
  border-color: var(--accent-cyan);
  color: #ffffff;
  background: rgba(0, 229, 255, 0.1);
  box-shadow: 0 4px 16px rgba(0, 229, 255, 0.2);
  transform: translateY(-2px);
}

.btn-outline:active {
  transform: translateY(1px);
}

/* Mobile Hamburger Menu */
.mobile-toggle {
  display: none;
}

.hamburger-label {
  display: none;
  flex-direction: column;
  justify-content: space-around;
  width: 30px;
  height: 24px;
  cursor: pointer;
  z-index: 1001;
}

.hamburger-label span {
  width: 100%;
  height: 2.5px;
  background-color: var(--accent-cyan);
  border-radius: 2px;
  transition: var(--transition);
}

/* ==========================================================================
   Hero Section (Split Two-Column Grid with Animated Vector Art)
   ========================================================================== */
.hero-section {
  padding: 70px 0 60px;
  position: relative;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 40px;
  align-items: center;
}

.hero-left {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  text-align: left;
}

.promo-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 18px;
  background: linear-gradient(90deg, rgba(239, 68, 68, 0.18), rgba(245, 158, 11, 0.18));
  border: 1px solid rgba(239, 68, 68, 0.4);
  border-radius: 50px;
  color: #fca5a5;
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 22px;
  animation: pulse-glow 2.5s infinite;
}

@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 12px rgba(239, 68, 68, 0.2); }
  50% { box-shadow: 0 0 24px rgba(245, 158, 11, 0.45); }
}

.hero-title {
  font-size: 3.1rem;
  font-weight: 800;
  line-height: 1.22;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
}

.gradient-text {
  background: linear-gradient(135deg, #00e5ff 0%, #38bdf8 45%, #818cf8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 0 20px rgba(0, 229, 255, 0.3));
}

.hero-desc {
  font-size: 1.1rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 32px;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  width: 100%;
  padding: 20px 22px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
}

.stat-item {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.stat-num {
  font-size: 1.45rem;
  font-weight: 800;
  color: #fff;
  font-variant-numeric: tabular-nums;
  background: linear-gradient(135deg, #ffffff, var(--accent-cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-secondary);
  line-height: 1.4;
}

/* ==========================================================================
   Hero Animated Vector Art (Transparent BG + Floating Marketing Badges)
   ========================================================================== */
.hero-right-visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 480px;
}

.hero-vector-stage {
  position: relative;
  width: 100%;
  max-width: 460px;
  height: 460px;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Animated SVG Elements */
.vector-orbit-ring {
  position: absolute;
  border-radius: 50%;
  border: 1px dashed rgba(0, 229, 255, 0.22);
  pointer-events: none;
}

.ring-outer {
  width: 420px;
  height: 420px;
  animation: orbitRotate 30s linear infinite;
}

.ring-mid {
  width: 320px;
  height: 320px;
  border-color: rgba(37, 99, 235, 0.3);
  animation: orbitRotateRev 22s linear infinite;
}

.ring-inner {
  width: 220px;
  height: 220px;
  border: 1.5px dotted rgba(0, 229, 255, 0.35);
  animation: orbitRotate 15s linear infinite;
}

@keyframes orbitRotate {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes orbitRotateRev {
  from { transform: rotate(360deg); }
  to { transform: rotate(0deg); }
}

/* Central Flying Bird Cyber Art Container */
.cyber-bird-center {
  position: relative;
  z-index: 5;
  width: 220px;
  height: 220px;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: floatBird 4.5s ease-in-out infinite;
}

@keyframes floatBird {
  0%, 100% { transform: translateY(0px) scale(1); }
  50% { transform: translateY(-12px) scale(1.02); }
}

.bird-glow-backdrop {
  position: absolute;
  width: 170px;
  height: 170px;
  background: radial-gradient(circle, rgba(0, 229, 255, 0.28) 0%, rgba(37, 99, 235, 0.15) 50%, transparent 75%);
  border-radius: 50%;
  filter: blur(16px);
  animation: pulseBackdrop 3.5s ease-in-out infinite;
}

@keyframes pulseBackdrop {
  0%, 100% { transform: scale(0.9); opacity: 0.6; }
  50% { transform: scale(1.15); opacity: 1; }
}

/* Floating Milestone Marketing Badges */
.badge-float {
  position: absolute;
  z-index: 10;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 16px;
  background: rgba(14, 22, 42, 0.88);
  border: 1px solid rgba(0, 229, 255, 0.35);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: 50px;
  font-size: 0.84rem;
  font-weight: 600;
  color: #fff;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5), 0 0 15px rgba(0, 229, 255, 0.2);
  white-space: nowrap;
  pointer-events: auto;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.badge-float:hover {
  transform: scale(1.06) !important;
  border-color: var(--accent-cyan);
  box-shadow: 0 10px 30px rgba(0, 229, 255, 0.4);
}

.badge-top-left {
  top: 25px;
  left: -10px;
  animation: floatBadge1 5s ease-in-out infinite;
}

.badge-top-right {
  top: 45px;
  right: -15px;
  animation: floatBadge2 5.5s ease-in-out infinite 0.8s;
}

.badge-bottom-left {
  bottom: 50px;
  left: -20px;
  animation: floatBadge3 6s ease-in-out infinite 1.4s;
}

.badge-bottom-right {
  bottom: 30px;
  right: -5px;
  animation: floatBadge4 5.2s ease-in-out infinite 2s;
}

@keyframes floatBadge1 {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-10px); }
}

@keyframes floatBadge2 {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-8px); }
}

@keyframes floatBadge3 {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-11px); }
}

@keyframes floatBadge4 {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-9px); }
}

.badge-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-green);
  box-shadow: 0 0 8px var(--accent-green);
}

/* ==========================================================================
   Fade In & Entrance Animations (页面及组件平滑淡入)
   ========================================================================== */
.fade-in-up {
  animation: fadeInUp 0.85s cubic-bezier(0.16, 1, 0.3, 1) both;
}

.fade-in-up-delay-1 {
  animation: fadeInUp 0.85s cubic-bezier(0.16, 1, 0.3, 1) 0.15s both;
}

.fade-in-up-delay-2 {
  animation: fadeInUp 0.85s cubic-bezier(0.16, 1, 0.3, 1) 0.3s both;
}

.fade-in-up-delay-3 {
  animation: fadeInUp 0.85s cubic-bezier(0.16, 1, 0.3, 1) 0.45s both;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ==========================================================================
   Sections Standard
   ========================================================================== */
.section {
  padding: 85px 0;
  position: relative;
}

.section-alt {
  background: rgba(12, 20, 39, 0.55);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.section-header {
  text-align: center;
  max-width: 780px;
  margin: 0 auto 52px;
}

.section-tag {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent-cyan);
  margin-bottom: 12px;
  background: rgba(0, 229, 255, 0.1);
  padding: 4px 14px;
  border-radius: 50px;
  border: 1px solid rgba(0, 229, 255, 0.28);
}

.section-title {
  font-size: 2.35rem;
  font-weight: 800;
  margin-bottom: 14px;
  letter-spacing: -0.02em;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.75;
}

/* ==========================================================================
   Dynamic Cards Section (核心优势与流媒体/AI支持)
   ========================================================================== */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
  margin-bottom: 32px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 34px 28px;
  transition: var(--transition);
  position: relative;
  box-shadow: var(--shadow-card);
}

.feature-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-glow);
  box-shadow: var(--shadow-glow);
  background: var(--bg-card-hover);
}

.feature-icon-box {
  width: 58px;
  height: 58px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.85rem;
  margin-bottom: 22px;
}

.feature-card:nth-child(1) .feature-icon-box {
  background: rgba(0, 229, 255, 0.12);
  border: 1px solid rgba(0, 229, 255, 0.35);
}

.feature-card:nth-child(2) .feature-icon-box {
  background: rgba(37, 99, 235, 0.15);
  border: 1px solid rgba(37, 99, 235, 0.35);
}

.feature-card:nth-child(3) .feature-icon-box {
  background: rgba(16, 185, 129, 0.15);
  border: 1px solid rgba(16, 185, 129, 0.35);
}

.feature-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: #fff;
}

.feature-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.75;
}

/* Streaming & AI Support Showcase Card */
.stream-ai-card {
  background: linear-gradient(135deg, rgba(8, 26, 60, 0.6) 0%, rgba(14, 22, 42, 0.95) 100%);
  border: 1.5px solid rgba(0, 229, 255, 0.3);
  border-radius: var(--radius-md);
  padding: 36px 32px;
  box-shadow: var(--shadow-card);
}

.stream-ai-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
  flex-wrap: wrap;
  gap: 16px;
}

.stream-ai-title-wrap h3 {
  font-size: 1.45rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: 6px;
}

.stream-ai-title-wrap p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.service-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.pill-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 50px;
  font-size: 0.9rem;
  font-weight: 500;
  color: #e2e8f0;
  transition: var(--transition);
}

.pill-item:hover {
  background: rgba(0, 229, 255, 0.12);
  border-color: var(--accent-cyan);
  color: #fff;
  transform: translateY(-2px);
}

.pill-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--accent-green);
  box-shadow: 0 0 8px var(--accent-green);
}

/* ==========================================================================
   Pricing Section (定价卡片区)
   ========================================================================== */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: var(--transition);
  box-shadow: var(--shadow-card);
}

.pricing-card:hover {
  transform: translateY(-6px);
  border-color: rgba(0, 229, 255, 0.4);
}

/* Highlighted Popular Card */
.pricing-card.featured {
  background: linear-gradient(180deg, rgba(8, 30, 70, 0.5) 0%, rgba(14, 22, 42, 0.95) 100%);
  border: 2px solid var(--accent-cyan);
  box-shadow: 0 0 35px rgba(0, 229, 255, 0.25), var(--shadow-card);
  transform: scale(1.03);
}

.pricing-card.featured:hover {
  transform: scale(1.03) translateY(-6px);
  box-shadow: 0 0 45px rgba(0, 229, 255, 0.4), var(--shadow-card);
}

.card-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, #00d2ff, #0084ff);
  color: #041226;
  font-size: 0.8rem;
  font-weight: 800;
  padding: 5px 18px;
  border-radius: 50px;
  box-shadow: 0 4px 14px rgba(0, 210, 255, 0.45);
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.card-badge.economy {
  background: linear-gradient(135deg, #059669, #10b981);
  color: #fff;
}

.card-badge.vip {
  background: linear-gradient(135deg, #6366f1, #8b5cf6);
  color: #fff;
}

.pricing-header {
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 24px;
  margin-bottom: 24px;
}

.pricing-name {
  font-size: 1.35rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: 6px;
}

.pricing-tagline {
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.pricing-price-wrap {
  margin: 18px 0 10px;
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.price-currency {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent-cyan);
}

.price-amount {
  font-size: 3.1rem;
  font-weight: 800;
  color: #fff;
  line-height: 1;
}

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

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

.pricing-features li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.93rem;
  color: #e2e8f0;
  margin-bottom: 14px;
  line-height: 1.5;
}

.pricing-features li .check-icon {
  color: var(--accent-cyan);
  font-weight: bold;
  font-size: 1.1rem;
  flex-shrink: 0;
  line-height: 1.3;
}

.pricing-card .btn {
  width: 100%;
}

/* ==========================================================================
   Supported Platforms & Download Section
   ========================================================================== */
.platform-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}

.platform-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 32px 24px;
  text-align: center;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: var(--shadow-card);
}

.platform-card:hover {
  transform: translateY(-5px);
  border-color: var(--border-cyan);
  box-shadow: var(--shadow-glow);
}

.platform-icon-wrap {
  width: 64px;
  height: 64px;
  margin: 0 auto 18px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.platform-name {
  font-size: 1.2rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 8px;
}

.platform-clients {
  font-size: 0.85rem;
  color: var(--accent-cyan);
  margin-bottom: 14px;
  font-weight: 600;
}

.platform-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 24px;
  flex-grow: 1;
}

.platform-card .btn {
  width: 100%;
}

/* ==========================================================================
   Deep Feature Analysis / Why Choose Section (深度特性解析区)
   ========================================================================== */
.why-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.why-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 32px;
  display: flex;
  gap: 20px;
  align-items: flex-start;
  transition: var(--transition);
  box-shadow: var(--shadow-card);
}

.why-card:hover {
  border-color: var(--border-cyan);
  background: var(--bg-card-hover);
  transform: translateY(-3px);
}

.why-emoji {
  font-size: 2.2rem;
  line-height: 1;
  flex-shrink: 0;
  background: rgba(0, 229, 255, 0.08);
  padding: 12px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(0, 229, 255, 0.2);
}

.why-body h4 {
  font-size: 1.18rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 8px;
}

.why-body p {
  font-size: 0.93rem;
  color: var(--text-secondary);
  line-height: 1.75;
}

/* ==========================================================================
   Testimonials Marquee Section (跑马灯横向无缝循环)
   ========================================================================== */
.marquee-wrapper {
  width: 100%;
  overflow: hidden;
  position: relative;
  padding: 24px 0;
}

.marquee-wrapper::before,
.marquee-wrapper::after {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  width: 140px;
  z-index: 2;
  pointer-events: none;
}

.marquee-wrapper::before {
  left: 0;
  background: linear-gradient(to right, var(--bg-primary), transparent);
}

.marquee-wrapper::after {
  right: 0;
  background: linear-gradient(to left, var(--bg-primary), transparent);
}

.marquee-track {
  display: flex;
  gap: 24px;
  width: max-content;
  animation: marquee-scroll 45s linear infinite;
}

.marquee-track:hover {
  animation-play-state: paused;
}

@keyframes marquee-scroll {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

.testimonial-card {
  width: 380px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 28px;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: var(--shadow-card);
}

.testimonial-rating {
  color: #fbbf24;
  font-size: 1.1rem;
  margin-bottom: 14px;
  letter-spacing: 2px;
}

.testimonial-text {
  font-size: 0.95rem;
  color: #f1f5f9;
  line-height: 1.75;
  margin-bottom: 20px;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 12px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 16px;
}

.author-avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  color: #041226;
  font-size: 0.95rem;
}

.author-info h5 {
  font-size: 0.95rem;
  font-weight: 700;
  color: #fff;
}

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

/* ==========================================================================
   FAQ Section (原生 details / summary 手风琴)
   ========================================================================== */
.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-sm);
  overflow: hidden;
  transition: var(--transition);
}

.faq-item[open] {
  border-color: var(--border-cyan);
  box-shadow: 0 4px 24px rgba(0, 229, 255, 0.15);
  background: var(--bg-card-hover);
}

.faq-summary {
  padding: 22px 24px;
  font-size: 1.05rem;
  font-weight: 600;
  color: #fff;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  list-style: none;
  user-select: none;
  transition: color 0.2s;
}

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

.faq-summary:hover {
  color: var(--accent-cyan);
}

.faq-icon {
  font-size: 1.35rem;
  color: var(--accent-cyan);
  transition: transform 0.25s ease;
  line-height: 1;
}

.faq-item[open] .faq-icon {
  transform: rotate(45deg);
  color: #ef4444;
}

.faq-content {
  padding: 0 24px 24px;
  font-size: 0.96rem;
  color: var(--text-secondary);
  line-height: 1.85;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  margin-top: 4px;
  padding-top: 16px;
}

/* ==========================================================================
   Bottom CTA Section (底部拦截转化区)
   ========================================================================== */
.bottom-cta-box {
  background: linear-gradient(135deg, rgba(8, 30, 70, 0.7) 0%, rgba(14, 22, 42, 0.95) 100%);
  border: 1.5px solid var(--border-cyan);
  border-radius: var(--radius-lg);
  padding: 64px 40px;
  text-align: center;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5), 0 0 30px rgba(0, 229, 255, 0.2);
}

.bottom-cta-title {
  font-size: 2.45rem;
  font-weight: 800;
  margin-bottom: 16px;
  color: #fff;
}

.bottom-cta-desc {
  font-size: 1.1rem;
  color: #cbd5e1;
  max-width: 680px;
  margin: 0 auto 36px;
  line-height: 1.8;
}

/* ==========================================================================
   Footer (仅保留4个标题/链接，打开新页面)
   ========================================================================== */
.site-footer {
  border-top: 1.5px solid rgba(0, 229, 255, 0.2);
  padding: 40px 0;
  background: #050914;
}

.footer-nav {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 36px;
  list-style: none;
  flex-wrap: wrap;
}

.footer-nav a {
  font-size: 0.95rem;
  color: var(--text-secondary);
  font-weight: 500;
  transition: color 0.2s;
}

.footer-nav a:hover {
  color: var(--accent-cyan);
}

/* ==========================================================================
   Auxiliary Pages (about, terms, privacy, sitemap)
   ========================================================================== */
.page-container {
  max-width: 880px;
  margin: 50px auto 80px;
  padding: 40px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
}

.page-title {
  font-size: 2.2rem;
  font-weight: 800;
  margin-bottom: 12px;
  color: #fff;
}

.page-updated {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 30px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--border-color);
}

.page-content h2 {
  font-size: 1.45rem;
  font-weight: 700;
  color: #fff;
  margin: 32px 0 14px;
}

.page-content p {
  font-size: 0.98rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 16px;
}

.page-content ul {
  margin: 12px 0 20px 24px;
  color: var(--text-secondary);
}

.page-content li {
  margin-bottom: 8px;
  line-height: 1.7;
}

.back-home-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 24px;
  color: var(--accent-cyan);
  font-size: 0.9rem;
  font-weight: 600;
}

.back-home-link:hover {
  text-decoration: underline;
}

/* ==========================================================================
   Responsive Media Queries (@media)
   ========================================================================== */
@media (max-width: 1080px) {
  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 50px;
  }
  
  .hero-left {
    align-items: center;
    text-align: center;
  }
  
  .hero-cta-group {
    justify-content: center;
  }
  
  .hero-right-visual {
    min-height: 420px;
  }
}

@media (max-width: 992px) {
  .nav-links, .nav-actions .btn-outline {
    display: none !important;
  }
  
  .hamburger-label {
    display: flex;
  }
  
  .mobile-toggle:checked ~ .nav-drawer {
    display: flex;
  }

  .mobile-toggle:checked ~ .hamburger-label span:nth-child(1) {
    transform: translateY(8.5px) rotate(45deg);
  }

  .mobile-toggle:checked ~ .hamburger-label span:nth-child(2) {
    opacity: 0;
  }

  .mobile-toggle:checked ~ .hamburger-label span:nth-child(3) {
    transform: translateY(-8.5px) rotate(-45deg);
  }
  
  .nav-drawer {
    display: none;
    position: fixed;
    top: 74px;
    left: 0;
    right: 0;
    background: rgba(8, 13, 26, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1.5px solid var(--border-cyan);
    flex-direction: column;
    padding: 24px;
    gap: 16px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.9);
    z-index: 999;
  }
  
  .nav-drawer a {
    font-size: 1.05rem;
    color: #e2e8f0;
    padding: 10px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    transition: var(--transition);
  }

  .nav-drawer a:hover {
    color: var(--accent-cyan);
    padding-left: 6px;
  }

  .hero-title {
    font-size: 2.6rem;
  }
  
  .feature-grid {
    grid-template-columns: 1fr;
  }
  
  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 500px;
    margin: 0 auto;
  }
  
  .pricing-card.featured {
    transform: none;
  }
  
  .pricing-card.featured:hover {
    transform: translateY(-6px);
  }
  
  .platform-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .why-grid {
    grid-template-columns: 1fr;
  }
  
  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  
  .hero-title {
    font-size: 2.1rem;
  }
  
  .hero-desc {
    font-size: 1rem;
  }
  
  .platform-grid {
    grid-template-columns: 1fr;
  }
  
  .hero-stats {
    grid-template-columns: 1fr 1fr;
    padding: 16px;
    gap: 12px;
  }
  
  .hero-vector-stage {
    max-width: 320px;
    height: 320px;
  }
  
  .ring-outer {
    width: 310px;
    height: 310px;
  }
  
  .ring-mid {
    width: 240px;
    height: 240px;
  }
  
  .ring-inner {
    width: 170px;
    height: 170px;
  }
  
  .badge-float {
    padding: 6px 12px;
    font-size: 0.75rem;
  }
  
  .badge-top-left { top: 10px; left: 0px; }
  .badge-top-right { top: 15px; right: 0px; }
  .badge-bottom-left { bottom: 15px; left: 0px; }
  .badge-bottom-right { bottom: 10px; right: 0px; }

  .bottom-cta-box {
    padding: 40px 20px;
  }
  
  .bottom-cta-title {
    font-size: 1.85rem;
  }
  
  .footer-nav {
    gap: 20px;
  }
  
  .page-container {
    padding: 24px 18px;
    margin: 30px auto;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 1.8rem;
  }
  
  .hero-cta-group {
    flex-direction: column;
    width: 100%;
  }
  
  .hero-cta-group .btn {
    width: 100%;
  }
  
  .hero-stats {
    grid-template-columns: 1fr;
  }
  
  .testimonial-card {
    width: 300px;
    padding: 20px;
  }
}

/* ==========================================================================
   Article Hub ("推荐资讯") & Article Single Pages Styling
   ========================================================================== */

/* Breadcrumbs */
.breadcrumb-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.breadcrumb-nav a {
  color: var(--accent-cyan);
  transition: var(--transition);
}

.breadcrumb-nav a:hover {
  text-decoration: underline;
  color: #fff;
}

.breadcrumb-separator {
  color: var(--text-muted);
  user-select: none;
}

.breadcrumb-current {
  color: var(--text-secondary);
  font-weight: 500;
}

/* Hub Hero */
.hub-header {
  text-align: center;
  max-width: 860px;
  margin: 40px auto 60px;
}

.hub-title {
  font-size: 2.6rem;
  font-weight: 800;
  margin-bottom: 16px;
  line-height: 1.3;
}

.hub-desc {
  font-size: 1.1rem;
  color: var(--text-secondary);
  line-height: 1.8;
}

/* 3-Column Responsive Article Grid */
.article-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-bottom: 60px;
}

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

.article-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-cyan);
  box-shadow: 0 16px 36px -10px rgba(0, 229, 255, 0.2);
  background: var(--bg-card-hover);
}

.article-card-cover {
  height: 180px;
  background: linear-gradient(135deg, rgba(8, 26, 60, 0.9) 0%, rgba(14, 22, 42, 0.95) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  border-bottom: 1px solid var(--border-color);
  overflow: hidden;
}

.article-card-cover::before {
  content: "";
  position: absolute;
  width: 140px;
  height: 140px;
  background: radial-gradient(circle, rgba(0, 229, 255, 0.3) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.cover-icon {
  font-size: 3.5rem;
  z-index: 2;
  filter: drop-shadow(0 4px 12px rgba(0, 229, 255, 0.3));
}

.card-badge-top {
  position: absolute;
  top: 14px;
  left: 14px;
  z-index: 3;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 4px;
  background: rgba(0, 229, 255, 0.15);
  border: 1px solid rgba(0, 229, 255, 0.4);
  color: var(--accent-cyan);
}

.article-card-body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.card-meta-row {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.card-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: #fff;
  line-height: 1.45;
  margin-bottom: 12px;
  transition: color 0.2s;
}

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

.card-excerpt {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 20px;
  flex-grow: 1;
}

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

.author-chip {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-secondary);
  font-weight: 500;
}

.author-chip-avatar {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
  color: #041226;
}

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

.read-more-link:hover {
  transform: translateX(3px);
}

/* ==========================================================================
   Article Single Page (H1 -> H2 -> H3, TOC, Content, Callouts)
   ========================================================================== */
.article-page-container {
  max-width: 900px;
  margin: 30px auto 80px;
  padding: 44px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
}

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

.article-header h1 {
  font-size: 2.35rem;
  font-weight: 800;
  line-height: 1.35;
  color: #fff;
  margin-bottom: 18px;
}

.article-info-bar {
  display: flex;
  align-items: center;
  gap: 18px;
  font-size: 0.88rem;
  color: var(--text-muted);
  flex-wrap: wrap;
}

.article-info-bar span {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

/* Table of Contents */
.toc-box {
  background: rgba(8, 20, 44, 0.65);
  border: 1px solid rgba(0, 229, 255, 0.25);
  border-radius: var(--radius-md);
  padding: 24px 28px;
  margin-bottom: 40px;
}

.toc-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--accent-cyan);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.toc-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toc-list a {
  color: var(--text-secondary);
  font-size: 0.94rem;
  transition: var(--transition);
  display: inline-block;
}

.toc-list a:hover {
  color: var(--accent-cyan);
  transform: translateX(4px);
}

.toc-sublist {
  list-style: none;
  margin-left: 20px;
  margin-top: 6px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.toc-sublist a {
  font-size: 0.88rem;
  color: var(--text-muted);
}

.toc-sublist a:hover {
  color: #fff;
}

/* Article Body Typography */
.article-content {
  font-size: 1.05rem;
  color: #cbd5e1;
  line-height: 1.85;
}

.article-content h2 {
  font-size: 1.65rem;
  font-weight: 800;
  color: #ffffff;
  margin: 44px 0 18px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  align-items: center;
  gap: 10px;
}

.article-content h3 {
  font-size: 1.3rem;
  font-weight: 700;
  color: #e2e8f0;
  margin: 30px 0 14px;
}

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

.article-content ul, .article-content ol {
  margin: 16px 0 24px 24px;
  color: #cbd5e1;
}

.article-content li {
  margin-bottom: 10px;
  line-height: 1.8;
}

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

.article-content blockquote {
  background: rgba(0, 229, 255, 0.06);
  border-left: 4px solid var(--accent-cyan);
  padding: 16px 20px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 24px 0;
  color: #e2e8f0;
  font-style: normal;
}

.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 28px 0;
  background: rgba(255, 255, 255, 0.02);
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 1px solid var(--border-color);
}

.article-content th, .article-content td {
  padding: 14px 18px;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
  font-size: 0.94rem;
}

.article-content th {
  background: rgba(0, 229, 255, 0.1);
  color: #fff;
  font-weight: 700;
}

.article-content tr:hover {
  background: rgba(255, 255, 255, 0.03);
}

.article-content a {
  color: var(--accent-cyan);
  text-decoration: underline;
  text-underline-offset: 4px;
  transition: color 0.2s;
}

.article-content a:hover {
  color: #fff;
}

/* In-Article Promotion CTA Box */
.in-article-cta {
  background: linear-gradient(135deg, rgba(8, 30, 70, 0.7) 0%, rgba(14, 22, 42, 0.95) 100%);
  border: 1.5px solid var(--border-cyan);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  margin: 40px 0;
  text-align: center;
  box-shadow: 0 10px 30px rgba(0, 229, 255, 0.15);
}

.in-article-cta h4 {
  font-size: 1.35rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: 10px;
}

.in-article-cta p {
  font-size: 0.98rem;
  color: var(--text-secondary);
  max-width: 620px;
  margin: 0 auto 20px;
}

/* Author Bio Box (E-E-A-T) */
.author-bio-card {
  display: flex;
  gap: 20px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  margin-top: 48px;
  align-items: center;
}

.author-bio-avatar {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  font-weight: 800;
  color: #041226;
  flex-shrink: 0;
}

.author-bio-info h4 {
  font-size: 1.1rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 4px;
}

.author-bio-info p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 0;
}

/* Media Queries for Articles */
@media (max-width: 992px) {
  .article-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .article-page-container {
    padding: 30px 22px;
  }
  
  .article-header h1 {
    font-size: 1.95rem;
  }
}

@media (max-width: 768px) {
  .article-grid {
    grid-template-columns: 1fr;
  }
  
  .hub-title {
    font-size: 2rem;
  }
  
  .article-page-container {
    padding: 24px 16px;
    margin: 20px auto 60px;
  }
  
  .article-header h1 {
    font-size: 1.7rem;
  }
  
  .author-bio-card {
    flex-direction: column;
    text-align: center;
  }
}