/* ===================================================================
   魔法喵 VPN (Magic Cat VPN) - Cosmic Cyber Purple Stylesheet
   Pure CSS3 with zero external dependencies for instant sub-second load
   =================================================================== */

:root {
  /* Cosmic Cyber Dark Palette */
  --color-bg: #0b0914;
  --color-bg-secondary: #120e22;
  --color-bg-card: #18142e;
  --color-bg-card-hover: #221c40;
  --color-border: #2c2550;
  --color-border-bright: #433878;
  --color-border-glow: rgba(168, 85, 247, 0.45);

  /* Primary Accent: Mystic Cyber Violet & Purple */
  --color-purple-light: #c084fc;
  --color-purple: #a855f7;
  --color-purple-hover: #c084fc;
  --color-purple-dark: #7e22ce;
  --color-purple-glow: rgba(168, 85, 247, 0.4);
  --color-purple-glow-intense: rgba(168, 85, 247, 0.75);

  /* Secondary Accent: Cyber Neon Pink / Fuchsia */
  --color-pink-light: #f472b6;
  --color-pink: #ec4899;
  --color-pink-hover: #f472b6;
  --color-pink-dark: #be185d;
  --color-pink-glow: rgba(236, 72, 153, 0.35);

  /* Tertiary Accent: Electric Cyber Cyan */
  --color-cyan: #06b6d4;
  --color-cyan-light: #67e8f9;
  --color-cyan-glow: rgba(6, 182, 212, 0.3);

  /* Warm Gold / Amber */
  --color-amber: #f59e0b;
  --color-amber-light: #fde68a;
  --color-amber-glow: rgba(245, 158, 11, 0.35);

  /* Status Colors */
  --color-success: #10b981;
  --color-success-glow: rgba(16, 185, 129, 0.3);

  /* Typography Colors */
  --color-text-main: #f8fafc;
  --color-text-muted: #94a3b8;
  --color-text-dim: #64748b;

  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-full: 9999px;

  --transition-fast: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-smooth: 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

/* ===================================================================
   Reset & Base Styles with Fade-in Animation
   =================================================================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  line-height: 1.6;
  overflow-x: hidden;
  background: radial-gradient(circle at 50% 0%, rgba(168, 85, 247, 0.16) 0%, transparent 45%),
              radial-gradient(circle at 85% 30%, rgba(236, 72, 153, 0.1) 0%, transparent 40%),
              radial-gradient(circle at 15% 70%, rgba(6, 182, 212, 0.08) 0%, transparent 50%),
              var(--color-bg);
  min-height: 100vh;
  animation: pageFadeIn 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes pageFadeIn {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

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

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* Container */
.container {
  width: 100%;
  max-width: 1240px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

/* Typography & Visual Effects */
.text-center { text-align: center; }

.gradient-text {
  background: linear-gradient(135deg, #ffffff 0%, #e9d5ff 30%, #c084fc 70%, #ec4899 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.gradient-purple {
  background: linear-gradient(135deg, #e9d5ff 0%, #a855f7 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.gradient-pink {
  background: linear-gradient(135deg, #fbcfe8 0%, #ec4899 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.section-header {
  margin-bottom: 56px;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 16px;
  background: rgba(168, 85, 247, 0.12);
  border: 1px solid rgba(168, 85, 247, 0.4);
  border-radius: var(--radius-full);
  color: #c084fc;
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 16px;
}

.section-title {
  font-size: 2.35rem;
  font-weight: 800;
  line-height: 1.25;
  color: var(--color-text-main);
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}

.section-desc {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  max-width: 680px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.7;
}

/* ===================================================================
   Buttons (High Contrast & Distinct Visual Affordance)
   =================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 700;
  border-radius: var(--radius-md);
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
  position: relative;
  overflow: hidden;
  letter-spacing: 0.3px;
}

.btn-primary {
  background: linear-gradient(135deg, #a855f7 0%, #ec4899 100%);
  color: #ffffff;
  box-shadow: 0 4px 20px var(--color-purple-glow), inset 0 1px 0 rgba(255, 255, 255, 0.35);
  border: 1px solid rgba(255, 255, 255, 0.25);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #c084fc 0%, #f472b6 100%);
  box-shadow: 0 8px 30px var(--color-purple-glow-intense), inset 0 1px 0 rgba(255, 255, 255, 0.45);
  transform: translateY(-2px);
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 2px 10px var(--color-purple-glow);
}

.btn-secondary {
  background: rgba(24, 20, 46, 0.95);
  color: var(--color-text-main);
  border: 1px solid var(--color-border-bright);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.35);
  backdrop-filter: blur(8px);
}

.btn-secondary:hover {
  background: var(--color-bg-card-hover);
  border-color: var(--color-purple-light);
  color: #ffffff;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(168, 85, 247, 0.25);
}

.btn-secondary:active {
  transform: translateY(0);
}

.btn-sm {
  padding: 9px 20px;
  font-size: 0.92rem;
}

.btn-md {
  padding: 13px 28px;
  font-size: 1.02rem;
}

.btn-lg {
  padding: 18px 40px;
  font-size: 1.18rem;
  font-weight: 800;
  border-radius: var(--radius-lg);
  box-shadow: 0 6px 24px var(--color-purple-glow), inset 0 1px 0 rgba(255, 255, 255, 0.4);
}

.btn-block {
  width: 100%;
}

/* ===================================================================
   导航栏 (Navbar: Sticky with clear bottom border & deep drop shadow)
   =================================================================== */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(11, 9, 20, 0.9);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(168, 85, 247, 0.3);
  box-shadow: 0 4px 28px rgba(0, 0, 0, 0.55);
  transition: all var(--transition-fast);
}

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

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  color: var(--color-text-main);
}

.brand-logo-icon {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: linear-gradient(135deg, rgba(168, 85, 247, 0.2), rgba(236, 72, 153, 0.2));
  border: 1px solid rgba(168, 85, 247, 0.45);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 6px;
  box-shadow: 0 2px 10px rgba(168, 85, 247, 0.25);
  transition: transform var(--transition-fast);
}

.brand-logo:hover .brand-logo-icon {
  transform: rotate(5deg) scale(1.05);
}

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

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

.nav-link:hover {
  color: #ffffff;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, #a855f7, #ec4899);
  transition: width var(--transition-fast);
  border-radius: 2px;
}

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

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

.mobile-menu-btn {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  color: var(--color-text-main);
  align-items: center;
  justify-content: center;
}

.mobile-menu-btn svg {
  width: 24px;
  height: 24px;
}

.mobile-drawer {
  display: none;
  position: fixed;
  top: 74px;
  left: 0;
  right: 0;
  background: rgba(18, 14, 34, 0.98);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border-bright);
  padding: 24px;
  flex-direction: column;
  gap: 16px;
  z-index: 999;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6);
  animation: slideDown 0.25s ease-out;
}

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

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ===================================================================
   首屏横幅区 (Hero Section: 2-Column Responsive Layout)
   =================================================================== */
.hero-section {
  position: relative;
  padding: 80px 0 60px;
  overflow: hidden;
}

.hero-glow-1 {
  position: absolute;
  top: 10%;
  left: -10%;
  width: 450px;
  height: 450px;
  background: radial-gradient(circle, rgba(168, 85, 247, 0.25) 0%, transparent 70%);
  filter: blur(60px);
  pointer-events: none;
  z-index: 0;
}

.hero-glow-2 {
  position: absolute;
  top: 20%;
  right: -5%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(236, 72, 153, 0.2) 0%, transparent 70%);
  filter: blur(70px);
  pointer-events: none;
  z-index: 0;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
  align-items: center;
  position: relative;
  z-index: 1;
}

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

.discount-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  background: linear-gradient(90deg, rgba(236, 72, 153, 0.15), rgba(168, 85, 247, 0.15));
  border: 1px solid rgba(236, 72, 153, 0.45);
  border-radius: var(--radius-full);
  color: #f472b6;
  font-size: 0.9rem;
  font-weight: 700;
  margin-bottom: 24px;
  box-shadow: 0 2px 14px rgba(236, 72, 153, 0.25);
  animation: pulseBadge 2.5s infinite;
}

@keyframes pulseBadge {
  0%, 100% {
    box-shadow: 0 0 0 0 rgba(236, 72, 153, 0.4);
  }
  50% {
    box-shadow: 0 0 0 8px rgba(236, 72, 153, 0);
  }
}

.hero-title {
  font-size: 3.25rem;
  font-weight: 900;
  line-height: 1.18;
  letter-spacing: -1px;
  margin-bottom: 20px;
  color: var(--color-text-main);
}

.hero-subtitle {
  font-size: 1.15rem;
  line-height: 1.75;
  color: var(--color-text-muted);
  margin-bottom: 36px;
  max-width: 580px;
}

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

/* Hero Right Column: Animated Vector Graphic */
.hero-art-col {
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
}

.hero-graphic-wrap {
  position: relative;
  width: 100%;
  max-width: 440px;
  aspect-ratio: 1 / 1;
  display: flex;
  align-items: center;
  justify-content: center;
}

.art-halo {
  position: absolute;
  inset: 10%;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(168, 85, 247, 0.28) 0%, rgba(236, 72, 153, 0.15) 50%, transparent 75%);
  filter: blur(35px);
  pointer-events: none;
}

.art-vector-svg {
  width: 100%;
  height: 100%;
  filter: drop-shadow(0 12px 28px rgba(168, 85, 247, 0.35));
}

/* Floating Marketing Feature Badges */
.art-floating-badge {
  position: absolute;
  z-index: 5;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: var(--radius-full);
  background: rgba(18, 14, 34, 0.9);
  backdrop-filter: blur(10px);
  border: 1px solid var(--color-border-bright);
  font-size: 0.8rem;
  font-weight: 700;
  color: #ffffff;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5);
  white-space: nowrap;
}

.badge-top-left {
  top: 6%;
  left: -2%;
  animation: floatBadge 3.2s ease-in-out infinite alternate;
}

.badge-bottom-right {
  bottom: 8%;
  right: -2%;
  animation: floatBadge 3.8s ease-in-out infinite alternate 0.5s;
}

.badge-bottom-left {
  bottom: 2%;
  left: 2%;
  animation: floatBadge 3.5s ease-in-out infinite alternate 1s;
}

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

.ping-indicator {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--color-success);
  box-shadow: 0 0 8px var(--color-success);
}

/* SVG Animations */
.ring-spin-slow {
  transform-origin: center;
  animation: spinClockwise 24s linear infinite;
}

.ring-spin-reverse {
  transform-origin: center;
  animation: spinCounterClockwise 32s linear infinite;
}

.ring-pulse-center {
  transform-origin: center;
  animation: pulseCenter 4s ease-in-out infinite alternate;
}

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

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

@keyframes pulseCenter {
  0% { transform: scale(0.98); }
  100% { transform: scale(1.02); }
}

/* Statistics Trust Bar */
.hero-trust-bar {
  margin-top: 56px;
  padding: 24px 32px;
  background: rgba(24, 20, 46, 0.6);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(10px);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.35);
}

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

.stat-number {
  font-size: 2.1rem;
  font-weight: 800;
  color: #ffffff;
  line-height: 1.1;
  letter-spacing: -0.5px;
}

.stat-unit {
  font-size: 1.1rem;
  color: var(--color-purple-light);
  margin-left: 2px;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-top: 6px;
}

/* ===================================================================
   核心优势图卡区 (Dynamic Cards Section)
   =================================================================== */
.features-section {
  padding: 90px 0;
  position: relative;
}

.cards-grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-bottom: 48px;
}

.feature-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 36px 30px;
  transition: all var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, #a855f7, #ec4899);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.feature-card:hover {
  background: var(--color-bg-card-hover);
  border-color: var(--color-border-bright);
  transform: translateY(-6px);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.4), 0 0 20px rgba(168, 85, 247, 0.15);
}

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

.feature-icon-wrapper {
  width: 58px;
  height: 58px;
  border-radius: var(--radius-md);
  background: rgba(168, 85, 247, 0.12);
  border: 1px solid rgba(168, 85, 247, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  margin-bottom: 22px;
}

.feature-title {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--color-text-main);
  margin-bottom: 14px;
}

.feature-desc {
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--color-text-muted);
}

/* 流媒体与 AI 支持图卡区 */
.media-ai-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.showcase-card {
  background: linear-gradient(145deg, rgba(24, 20, 46, 0.9) 0%, rgba(18, 14, 34, 0.9) 100%);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.35);
  position: relative;
  transition: all var(--transition-smooth);
}

.showcase-card:hover {
  border-color: var(--color-purple-light);
  transform: translateY(-4px);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.45), 0 0 25px rgba(168, 85, 247, 0.15);
}

.showcase-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 16px;
}

.showcase-icon {
  font-size: 2.2rem;
}

.showcase-title {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--color-text-main);
}

.showcase-desc {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: 24px;
}

.tags-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.app-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  background: rgba(44, 37, 80, 0.5);
  border: 1px solid var(--color-border-bright);
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 600;
  color: #e2e8f0;
  transition: all var(--transition-fast);
}

.app-tag:hover {
  background: rgba(168, 85, 247, 0.25);
  border-color: var(--color-purple-light);
  color: #ffffff;
  transform: translateY(-2px);
}

/* ===================================================================
   定价卡片区 (Pricing Section)
   =================================================================== */
.pricing-section {
  padding: 90px 0;
  position: relative;
  background: linear-gradient(180deg, transparent 0%, rgba(18, 14, 34, 0.5) 50%, transparent 100%);
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: stretch;
}

.pricing-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 38px 30px;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-smooth);
  position: relative;
}

.pricing-card:hover {
  background: var(--color-bg-card-hover);
  border-color: var(--color-border-bright);
  transform: translateY(-8px);
  box-shadow: 0 20px 45px rgba(0, 0, 0, 0.5);
}

.pricing-card.featured {
  background: linear-gradient(165deg, rgba(34, 28, 64, 0.95) 0%, rgba(24, 20, 46, 0.95) 100%);
  border: 2px solid var(--color-purple);
  box-shadow: 0 16px 40px rgba(168, 85, 247, 0.25);
  transform: scale(1.03);
  z-index: 2;
}

.pricing-card.featured:hover {
  transform: scale(1.03) translateY(-8px);
  box-shadow: 0 24px 50px rgba(168, 85, 247, 0.35);
}

.popular-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(90deg, #ec4899, #a855f7);
  color: #ffffff;
  padding: 4px 18px;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.5px;
  box-shadow: 0 4px 12px rgba(236, 72, 153, 0.4);
  white-space: nowrap;
}

.pricing-header {
  margin-bottom: 20px;
}

.plan-type {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--color-purple-light);
  letter-spacing: 1px;
  margin-bottom: 6px;
}

.plan-name {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-text-main);
}

.price-wrap {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 16px;
}

.currency {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--color-text-main);
}

.amount {
  font-size: 3.2rem;
  font-weight: 900;
  color: #ffffff;
  line-height: 1;
  letter-spacing: -1px;
}

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

.plan-summary {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: 24px;
  min-height: 44px;
}

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

.feature-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.9rem;
  color: #cbd5e1;
  margin-bottom: 14px;
  line-height: 1.5;
}

.feature-check {
  color: var(--color-purple-light);
  font-size: 1.1rem;
  line-height: 1;
  flex-shrink: 0;
  margin-top: 2px;
}

/* ===================================================================
   支持平台与客户端下载区 (Platforms Section)
   =================================================================== */
.download-section {
  padding: 90px 0;
  position: relative;
}

.platform-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.platform-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  text-align: center;
  transition: all var(--transition-smooth);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.platform-card:hover {
  background: var(--color-bg-card-hover);
  border-color: var(--color-border-bright);
  transform: translateY(-6px);
  box-shadow: 0 14px 32px rgba(0, 0, 0, 0.4);
}

.platform-icon {
  width: 52px;
  height: 52px;
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.platform-icon svg {
  width: 44px;
  height: 44px;
  fill: #c084fc;
  transition: transform var(--transition-fast);
}

.platform-card:hover .platform-icon svg {
  transform: scale(1.1);
  fill: #ec4899;
}

.platform-name {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-text-main);
  margin-bottom: 10px;
}

.platform-clients {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: 24px;
  flex-grow: 1;
}

/* ===================================================================
   深度特性解析区 (Why Choose Section)
   =================================================================== */
.why-us-section {
  padding: 90px 0;
  position: relative;
}

.reasons-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.reason-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  transition: all var(--transition-fast);
}

.reason-card:hover {
  background: var(--color-bg-card-hover);
  border-color: var(--color-purple-light);
  transform: translateY(-4px);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.35);
}

.reason-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.reason-emoji {
  font-size: 1.6rem;
  line-height: 1;
}

.reason-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-text-main);
}

.reason-desc {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.65;
}

/* ===================================================================
   底部转化区 (CTA Section)
   =================================================================== */
.cta-banner-section {
  padding: 80px 0;
  position: relative;
}

.cta-banner-card {
  background: radial-gradient(circle at 50% 0%, rgba(168, 85, 247, 0.25) 0%, rgba(24, 20, 46, 0.95) 70%),
              var(--color-bg-card);
  border: 1px solid rgba(168, 85, 247, 0.45);
  border-radius: var(--radius-lg);
  padding: 56px 40px;
  text-align: center;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5), 0 0 35px rgba(168, 85, 247, 0.2);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.cta-title {
  font-size: 2.5rem;
  font-weight: 900;
  color: #ffffff;
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}

.cta-subtitle {
  font-size: 1.15rem;
  color: #cbd5e1;
  max-width: 640px;
  line-height: 1.7;
  margin-bottom: 32px;
}

/* ===================================================================
   用户评价跑马灯区 (Testimonials Marquee Section)
   =================================================================== */
.testimonials-section {
  padding: 90px 0 60px;
  position: relative;
  overflow: hidden;
}

.marquee-container {
  width: 100%;
  overflow: hidden;
  position: relative;
  padding: 20px 0;
  mask-image: linear-gradient(to right, transparent, black 10%, black 90%, transparent);
  -webkit-mask-image: linear-gradient(to right, transparent, black 10%, black 90%, transparent);
}

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

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

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

.review-card {
  width: 360px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 26px 22px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
  flex-shrink: 0;
  transition: all var(--transition-fast);
}

.review-card:hover {
  background: var(--color-bg-card-hover);
  border-color: var(--color-border-bright);
  transform: translateY(-4px);
}

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

.review-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, #a855f7, #ec4899);
  color: #ffffff;
  font-weight: 800;
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 8px rgba(168, 85, 247, 0.35);
}

.review-user-name {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text-main);
}

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

.review-stars {
  color: #fbbf24;
  font-size: 1rem;
  letter-spacing: 2px;
}

.review-content {
  font-size: 0.9rem;
  color: #cbd5e1;
  line-height: 1.65;
}

/* ===================================================================
   常见问题解答区 (FAQ Section: Native <details> and <summary>)
   =================================================================== */
.faq-section {
  padding: 90px 0;
  position: relative;
}

.faq-container {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

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

.faq-item[open] {
  border-color: rgba(168, 85, 247, 0.45);
  background: var(--color-bg-card-hover);
}

.faq-question {
  padding: 20px 24px;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--color-text-main);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  list-style: none;
  user-select: none;
}

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

.faq-arrow {
  width: 20px;
  height: 20px;
  color: var(--color-purple-light);
  transition: transform var(--transition-smooth);
  flex-shrink: 0;
}

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

.faq-answer {
  padding: 0 24px 22px;
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--color-text-muted);
  border-top: 1px solid rgba(44, 37, 80, 0.5);
  padding-top: 16px;
}

/* ===================================================================
   页脚 (Footer: Strictly only retains the 4 required links)
   =================================================================== */
.footer {
  background: #07050d;
  border-top: 1px solid var(--color-border);
  padding: 48px 0 36px;
}

.footer-nav {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 36px;
  list-style: none;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

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

.footer-link:hover {
  color: var(--color-purple-light);
}

.footer-copyright {
  text-align: center;
  font-size: 0.85rem;
  color: var(--color-text-dim);
}

/* ===================================================================
   文章中心与独立文章页样式 (Article Hub & Standalone Article Pages)
   =================================================================== */
.breadcrumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-bottom: 24px;
}

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

.breadcrumbs a:hover {
  color: var(--color-purple-light);
}

.breadcrumbs-separator {
  color: var(--color-text-dim);
}

.article-hero {
  padding: 60px 0 40px;
  text-align: center;
}

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

.article-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 30px 24px;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-smooth);
}

.article-card:hover {
  background: var(--color-bg-card-hover);
  border-color: var(--color-purple-light);
  transform: translateY(-6px);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.45);
}

.article-tag {
  align-self: flex-start;
  padding: 4px 12px;
  background: rgba(168, 85, 247, 0.15);
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-purple-light);
  margin-bottom: 16px;
}

.article-card-title {
  font-size: 1.2rem;
  font-weight: 700;
  line-height: 1.4;
  color: var(--color-text-main);
  margin-bottom: 12px;
}

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

.article-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--color-text-dim);
  border-top: 1px solid var(--color-border);
  padding-top: 14px;
}

/* 独立文章详情排版 */
.article-detail-wrap {
  max-width: 860px;
  margin: 0 auto;
  padding: 40px 0 80px;
}

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

.article-meta {
  display: flex;
  align-items: center;
  gap: 18px;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-top: 16px;
}

.article-content {
  font-size: 1.05rem;
  line-height: 1.85;
  color: #e2e8f0;
}

.article-content h2 {
  font-size: 1.65rem;
  font-weight: 800;
  color: #ffffff;
  margin: 40px 0 18px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-border);
}

.article-content h3 {
  font-size: 1.3rem;
  font-weight: 700;
  color: #f1f5f9;
  margin: 28px 0 14px;
}

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

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

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

.article-content a {
  color: var(--color-purple-light);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.article-content a:hover {
  color: var(--color-pink-light);
}

.article-content blockquote {
  border-left: 4px solid var(--color-purple);
  background: rgba(168, 85, 247, 0.08);
  padding: 16px 20px;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin: 24px 0;
  color: #cbd5e1;
  font-style: italic;
}

.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 28px 0;
  font-size: 0.95rem;
}

.article-content th, .article-content td {
  padding: 12px 16px;
  border: 1px solid var(--color-border);
  text-align: left;
}

.article-content th {
  background: var(--color-bg-card-hover);
  color: #ffffff;
}

.article-content tr:nth-child(even) {
  background: rgba(24, 20, 46, 0.4);
}

/* ===================================================================
   响应式适配 (Responsive Media Queries)
   =================================================================== */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 40px;
  }

  .hero-text-col {
    align-items: center;
  }

  .hero-title {
    font-size: 2.75rem;
  }

  .hero-subtitle {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-trust-bar {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }

  .cards-grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }

  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 480px;
    margin-left: auto;
    margin-right: auto;
  }

  .pricing-card.featured {
    transform: none;
  }

  .pricing-card.featured:hover {
    transform: translateY(-8px);
  }

  .platform-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .reasons-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .article-grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
}

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

  .mobile-menu-btn {
    display: flex;
  }

  .hero-title {
    font-size: 2.2rem;
  }

  .hero-subtitle {
    font-size: 1rem;
  }

  .hero-graphic-wrap {
    max-width: 320px;
  }

  .hero-trust-bar {
    grid-template-columns: 1fr;
    padding: 20px;
  }

  .cards-grid-3 {
    grid-template-columns: 1fr;
  }

  .media-ai-grid {
    grid-template-columns: 1fr;
  }

  .platform-grid {
    grid-template-columns: 1fr;
  }

  .reasons-grid {
    grid-template-columns: 1fr;
  }

  .article-grid-3 {
    grid-template-columns: 1fr;
  }

  .cta-title {
    font-size: 1.85rem;
  }

  .cta-banner-card {
    padding: 40px 20px;
  }

  .review-card {
    width: 290px;
  }

  .footer-nav {
    gap: 20px;
  }
}