/* ===================================================================
   KTM Cloud 加速器 - Emerald Matrix Green Premium Stylesheet
   Pure Native CSS3 - Zero External Dependencies for Instant Sub-Second Load
   =================================================================== */

:root {
  /* Color Palette: Emerald Matrix Green & Deep Obsidian Graphite */
  --color-bg: #090e0c;
  --color-bg-secondary: #0d1512;
  --color-bg-card: #121f1a;
  --color-bg-card-hover: #172a23;
  --color-border: #1a3328;
  --color-border-bright: #2d5544;
  --color-border-emerald: rgba(16, 185, 129, 0.45);
  --color-border-mint: rgba(52, 211, 153, 0.45);

  /* Primary Brand Accents: High-Speed Emerald & Radiant Mint */
  --color-emerald: #10b981;
  --color-emerald-hover: #34d399;
  --color-emerald-dark: #059669;
  --color-emerald-glow: rgba(16, 185, 129, 0.35);
  --color-emerald-glow-intense: rgba(16, 185, 129, 0.65);

  /* Secondary Accent: Electric Mint & Cyan */
  --color-mint: #34d399;
  --color-mint-light: #6ee7b7;
  --color-mint-glow: rgba(52, 211, 153, 0.35);

  /* Discount & Highlight Accent: Golden Amber */
  --color-gold: #f59e0b;
  --color-gold-hover: #fbbf24;
  --color-gold-glow: rgba(245, 158, 11, 0.4);

  /* Status Colors */
  --color-success: #10b981;
  --color-success-glow: rgba(16, 185, 129, 0.35);

  /* Typography Colors */
  --color-text-main: #f0fdf4;
  --color-text-muted: #94a3b8;
  --color-text-dim: #64748b;
  --color-text-emerald: #34d399;

  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --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);
  --shadow-card: 0 10px 30px -10px rgba(0, 0, 0, 0.6);
  --shadow-glow: 0 0 25px rgba(16, 185, 129, 0.25);
}

/* ===================================================================
   Reset & Base Styles with Page Fade-In
   =================================================================== */
*, *::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: 1.65;
  overflow-x: hidden;
  background: radial-gradient(circle at 50% 0%, rgba(16, 185, 129, 0.12) 0%, transparent 45%),
              radial-gradient(circle at 85% 25%, rgba(52, 211, 153, 0.08) 0%, transparent 40%),
              radial-gradient(circle at 15% 75%, rgba(16, 185, 129, 0.06) 0%, transparent 50%),
              var(--color-bg);
  min-height: 100vh;
  animation: pageFadeIn 0.5s ease-out;
}

@keyframes pageFadeIn {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  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 & Helpers */
.text-center { text-align: center; }

.gradient-text {
  background: linear-gradient(135deg, #34d399 0%, #10b981 50%, #6ee7b7 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.gradient-text-gold {
  background: linear-gradient(135deg, #fbbf24 0%, #f59e0b 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

/* Section Header Structure */
.section-header {
  margin-bottom: 56px;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--color-emerald);
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid var(--color-border-emerald);
  border-radius: var(--radius-full);
  margin-bottom: 16px;
}

.section-tag-gold {
  color: var(--color-gold);
  background: rgba(245, 158, 11, 0.1);
  border-color: rgba(245, 158, 11, 0.3);
}

.section-title {
  font-size: 2.25rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  line-height: 1.25;
  margin-bottom: 16px;
  color: #fff;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--color-text-muted);
  max-width: 680px;
  margin-left: auto;
  margin-right: auto;
}

/* ===================================================================
   Buttons with Distinct Physical Styling
   =================================================================== */
.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;
  white-space: nowrap;
  user-select: none;
  border: 1px solid transparent;
  position: relative;
  overflow: hidden;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.35);
}

.btn:active {
  transform: translateY(1px) scale(0.98);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.4);
}

.btn-sm {
  padding: 8px 20px;
  font-size: 0.88rem;
  border-radius: var(--radius-sm);
  min-height: 40px;
}

.btn-md {
  padding: 12px 28px;
  font-size: 0.98rem;
  min-height: 48px;
}

.btn-lg {
  padding: 16px 36px;
  font-size: 1.12rem;
  border-radius: var(--radius-md);
  min-height: 56px;
}

.btn-full {
  width: 100%;
}

/* Primary Button: Matrix Emerald High-Speed Physical Button */
.btn-primary {
  background: linear-gradient(180deg, #34d399 0%, #10b981 40%, #059669 100%);
  color: #04140d;
  border: 1.5px solid #6ee7b7;
  box-shadow: 0 0 22px rgba(16, 185, 129, 0.45), 0 4px 12px rgba(0, 0, 0, 0.4), inset 0 1px 1px rgba(255, 255, 255, 0.5), inset 0 -1px 2px rgba(0, 0, 0, 0.3);
  font-weight: 800;
  text-shadow: 0 1px 0 rgba(255, 255, 255, 0.2);
}

.btn-primary:hover {
  background: linear-gradient(180deg, #6ee7b7 0%, #34d399 50%, #10b981 100%);
  color: #020c08;
  border-color: #a7f3d0;
  box-shadow: 0 0 32px rgba(52, 211, 153, 0.7), 0 6px 18px rgba(0, 0, 0, 0.5), inset 0 1px 2px rgba(255, 255, 255, 0.7);
  transform: translateY(-2px);
}

/* Secondary Button: Distinct Beveled Glass Border */
.btn-secondary {
  background: linear-gradient(180deg, rgba(23, 42, 35, 0.9) 0%, rgba(14, 25, 21, 0.95) 100%);
  color: #f0fdf4;
  border: 1.5px solid #2d5544;
  backdrop-filter: blur(10px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.35), inset 0 1px 1px rgba(255, 255, 255, 0.1);
}

.btn-secondary:hover {
  background: linear-gradient(180deg, rgba(28, 52, 43, 0.95) 0%, rgba(18, 33, 28, 1) 100%);
  border-color: var(--color-emerald);
  color: #ffffff;
  box-shadow: 0 0 18px rgba(16, 185, 129, 0.35), 0 6px 16px rgba(0, 0, 0, 0.45);
  transform: translateY(-2px);
}

/* Gold Button for VIP Plan: Radiant Amber Physical Button */
.btn-gold {
  background: linear-gradient(180deg, #fbbf24 0%, #f59e0b 50%, #d97706 100%);
  color: #1a0e00;
  border: 1.5px solid #fde68a;
  box-shadow: 0 0 22px var(--color-gold-glow), 0 4px 12px rgba(0, 0, 0, 0.4), inset 0 1px 1px rgba(255, 255, 255, 0.6), inset 0 -1px 2px rgba(0, 0, 0, 0.3);
  font-weight: 800;
  text-shadow: 0 1px 0 rgba(255, 255, 255, 0.3);
}

.btn-gold:hover {
  background: linear-gradient(180deg, #fde68a 0%, #fbbf24 50%, #f59e0b 100%);
  color: #140b00;
  border-color: #fef3c7;
  box-shadow: 0 0 32px rgba(245, 158, 11, 0.7), 0 6px 18px rgba(0, 0, 0, 0.5);
  transform: translateY(-2px);
}

/* ===================================================================
   Sticky Navbar with Clear Distinguishing Border
   =================================================================== */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(9, 14, 12, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 2px solid rgba(52, 211, 153, 0.35);
  box-shadow: 0 6px 24px -2px rgba(0, 0, 0, 0.7), 0 1px 0 rgba(52, 211, 153, 0.15);
  transition: all var(--transition-smooth);
}

.navbar .container {
  max-width: 1360px;
}

.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 16px;
}

/* Top left brand logo - clickable */
.brand-logo {
  display: flex;
  align-items: center;
  cursor: pointer;
  text-decoration: none;
  flex-shrink: 0;
}

.brand-logo:hover {
  opacity: 0.92;
}

.brand-logo-img {
  height: 38px;
  width: auto;
  flex-shrink: 0;
}

/* Desktop Nav links */
.nav-links {
  display: flex;
  align-items: center;
  gap: 10px;
  list-style: none;
  margin: 0;
  padding: 0;
  flex-wrap: nowrap;
}

.nav-link {
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--color-text-muted);
  padding: 6px 8px;
  border-radius: var(--radius-sm);
  white-space: nowrap;
  word-break: keep-all;
  flex-shrink: 0;
  transition: all var(--transition-fast);
}

.nav-link:hover {
  color: var(--color-emerald);
  background: rgba(16, 185, 129, 0.08);
}

.nav-link.highlight {
  color: var(--color-mint-light);
  font-weight: 600;
  background: rgba(52, 211, 153, 0.12);
  border: 1px solid var(--color-border-mint);
  white-space: nowrap;
}

.nav-link.highlight:hover {
  background: rgba(52, 211, 153, 0.22);
  border-color: var(--color-mint);
  box-shadow: 0 0 12px rgba(52, 211, 153, 0.3);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.nav-actions .btn-sm {
  white-space: nowrap;
  padding: 7px 14px;
  font-size: 0.85rem;
}

/* Mobile Hamburger Menu */
.mobile-menu-btn {
  display: none;
  color: var(--color-text-main);
  padding: 8px;
  border-radius: var(--radius-sm);
  background: rgba(18, 31, 26, 0.6);
  border: 1px solid var(--color-border);
}

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

.mobile-drawer {
  display: none;
  flex-direction: column;
  gap: 8px;
  padding: 16px 24px 24px;
  background: var(--color-bg-secondary);
  border-bottom: 1px solid var(--color-border-bright);
}

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

.mobile-drawer .nav-link {
  padding: 12px 16px;
  font-size: 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
}

.mobile-drawer .nav-link:hover {
  background: rgba(16, 185, 129, 0.1);
  border-color: var(--color-border-emerald);
}

/* ===================================================================
   首屏横幅区 (Hero Section: 2-Column Responsive Layout)
   =================================================================== */
.hero-section {
  position: relative;
  padding: 64px 0 84px;
  overflow: hidden;
}

.hero-glow-1 {
  position: absolute;
  top: -100px;
  left: 20%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(16, 185, 129, 0.18) 0%, transparent 70%);
  pointer-events: none;
  filter: blur(50px);
}

.hero-glow-2 {
  position: absolute;
  top: 100px;
  right: 5%;
  width: 450px;
  height: 450px;
  background: radial-gradient(circle, rgba(52, 211, 153, 0.14) 0%, transparent 70%);
  pointer-events: none;
  filter: blur(60px);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  align-items: center;
  gap: 48px;
  position: relative;
  z-index: 2;
}

.discount-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 18px;
  border-radius: var(--radius-full);
  background: rgba(245, 158, 11, 0.12);
  border: 1px solid rgba(245, 158, 11, 0.4);
  color: #fbbf24;
  font-size: 0.9rem;
  font-weight: 700;
  margin-bottom: 24px;
  box-shadow: 0 0 20px rgba(245, 158, 11, 0.25);
  animation: pulseBadge 2.5s infinite;
}

@keyframes pulseBadge {
  0%, 100% {
    box-shadow: 0 0 15px rgba(245, 158, 11, 0.2);
  }
  50% {
    box-shadow: 0 0 28px rgba(245, 158, 11, 0.45);
  }
}

.hero-title {
  font-size: 3.1rem;
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: -1px;
  margin-bottom: 22px;
  color: #ffffff;
}

.hero-subtitle {
  font-size: 1.12rem;
  color: var(--color-text-muted);
  line-height: 1.75;
  margin-bottom: 36px;
  max-width: 580px;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 36px;
  flex-wrap: wrap;
}

.hero-trust-row {
  display: flex;
  align-items: center;
  gap: 24px;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
  flex-wrap: wrap;
}

.hero-trust-item {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--color-text-dim);
  font-size: 0.88rem;
  font-weight: 500;
}

.hero-trust-item svg {
  width: 18px;
  height: 18px;
  color: var(--color-emerald);
}

/* Hero Right: Animated Vector Art on Transparent BG */
.hero-art-col {
  display: flex;
  justify-content: center;
  align-items: center;
}

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

.art-halo {
  position: absolute;
  inset: 10%;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(16, 185, 129, 0.22) 0%, rgba(52, 211, 153, 0.08) 50%, transparent 70%);
  filter: blur(25px);
  animation: haloPulse 4s ease-in-out infinite alternate;
}

@keyframes haloPulse {
  0% { transform: scale(0.92); opacity: 0.7; }
  100% { transform: scale(1.08); opacity: 1; }
}

.art-orbit-ring {
  position: absolute;
  border-radius: 50%;
  border: 1px dashed rgba(52, 211, 153, 0.4);
  pointer-events: none;
}

.art-orbit-ring-1 {
  width: 82%;
  height: 82%;
  animation: rotateClockwise 24s linear infinite;
}

.art-orbit-ring-2 {
  width: 62%;
  height: 62%;
  border-color: rgba(16, 185, 129, 0.3);
  animation: rotateCounter 18s linear infinite;
}

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

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

.art-center-core {
  position: relative;
  z-index: 3;
}

.art-shield-core {
  width: 140px;
  height: 140px;
  border-radius: 36px;
  background: linear-gradient(135deg, #12211b 0%, #090e0c 100%);
  border: 2px solid var(--color-emerald);
  box-shadow: 0 0 35px var(--color-emerald-glow-intense), inset 0 0 20px rgba(16, 185, 129, 0.3);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  animation: floatCore 4s ease-in-out infinite alternate;
}

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

.art-shield-core svg {
  width: 50px;
  height: 50px;
  filter: drop-shadow(0 0 10px rgba(52, 211, 153, 0.7));
}

.art-core-label {
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 2px;
  color: var(--color-mint-light);
}

/* Floating Badges around Hero Art */
.art-floating-badge {
  position: absolute;
  z-index: 4;
  padding: 8px 14px;
  border-radius: var(--radius-full);
  background: rgba(14, 23, 20, 0.88);
  border: 1px solid var(--color-border-bright);
  backdrop-filter: blur(12px);
  color: #fff;
  font-size: 0.82rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5), 0 0 15px rgba(16, 185, 129, 0.2);
  white-space: nowrap;
}

.ping-indicator {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-emerald);
  box-shadow: 0 0 8px var(--color-emerald);
  animation: pingDot 1.5s infinite;
}

@keyframes pingDot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(1.3); }
}

.badge-top-left {
  top: 6%;
  left: -4%;
  animation: floatBadge1 5s ease-in-out infinite alternate;
}

.badge-top-right {
  top: 10%;
  right: -6%;
  animation: floatBadge2 6s ease-in-out infinite alternate;
}

.badge-bottom-left {
  bottom: 8%;
  left: -8%;
  animation: floatBadge3 5.5s ease-in-out infinite alternate;
}

.badge-bottom-right {
  bottom: 6%;
  right: -4%;
  animation: floatBadge4 6.5s ease-in-out infinite alternate;
}

@keyframes floatBadge1 { 0% { transform: translateY(0); } 100% { transform: translateY(-8px); } }
@keyframes floatBadge2 { 0% { transform: translateY(0); } 100% { transform: translateY(8px); } }
@keyframes floatBadge3 { 0% { transform: translateY(0); } 100% { transform: translateY(6px); } }
@keyframes floatBadge4 { 0% { transform: translateY(0); } 100% { transform: translateY(-6px); } }

/* ===================================================================
   核心优势图卡区 (Dynamic Cards Section)
   =================================================================== */
.features-section {
  padding: 80px 0;
  position: relative;
  background: linear-gradient(180deg, transparent 0%, rgba(13, 21, 18, 0.5) 100%);
}

.features-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 28px;
  transition: all var(--transition-smooth);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.feature-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--color-emerald), transparent);
  opacity: 0;
  transition: opacity var(--transition-smooth);
}

.feature-card:hover {
  background: var(--color-bg-card-hover);
  border-color: var(--color-border-emerald);
  transform: translateY(-6px);
  box-shadow: 0 16px 40px -10px rgba(0, 0, 0, 0.7), 0 0 20px rgba(16, 185, 129, 0.2);
}

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

.feature-icon-wrap {
  width: 58px;
  height: 58px;
  border-radius: var(--radius-md);
  background: rgba(16, 185, 129, 0.12);
  border: 1px solid var(--color-border-emerald);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-emerald);
  margin-bottom: 24px;
}

.feature-title {
  font-size: 1.32rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 14px;
  line-height: 1.35;
}

.feature-desc {
  font-size: 0.94rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: 24px;
}

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

.feature-points li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.88rem;
  color: var(--color-text-main);
}

.feature-points li svg {
  width: 16px;
  height: 16px;
  color: var(--color-emerald);
  flex-shrink: 0;
  margin-top: 4px;
}

/* 流媒体与 AI 支持图卡 */
.media-ai-card {
  background: linear-gradient(135deg, rgba(18, 31, 26, 0.95) 0%, rgba(13, 21, 18, 0.95) 100%);
  border: 1px solid var(--color-border-bright);
  border-radius: var(--radius-lg);
  padding: 44px 40px;
  box-shadow: var(--shadow-card);
  position: relative;
  overflow: hidden;
}

.media-ai-card::after {
  content: "";
  position: absolute;
  right: -50px;
  top: -50px;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(52, 211, 153, 0.12) 0%, transparent 70%);
  pointer-events: none;
}

.media-ai-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 40px;
  align-items: center;
}

.media-ai-content h3 {
  font-size: 1.75rem;
  font-weight: 800;
  color: #fff;
  margin: 12px 0 16px;
}

.media-ai-content p {
  color: var(--color-text-muted);
  font-size: 0.98rem;
  line-height: 1.75;
  margin-bottom: 28px;
}

.media-pill-group {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.media-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: var(--radius-full);
  background: rgba(14, 23, 20, 0.8);
  border: 1px solid var(--color-border);
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--color-text-main);
  transition: all var(--transition-fast);
}

.media-pill:hover {
  border-color: var(--color-emerald);
  background: rgba(16, 185, 129, 0.1);
  transform: translateY(-2px);
}

.media-showcase-box {
  background: rgba(9, 14, 12, 0.7);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.showcase-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
  border-radius: var(--radius-sm);
  background: rgba(18, 31, 26, 0.5);
  border: 1px solid rgba(45, 85, 68, 0.4);
}

.showcase-icon {
  font-size: 1.5rem;
}

.showcase-item-title {
  font-size: 0.88rem;
  font-weight: 700;
  color: #fff;
}

.showcase-item-sub {
  font-size: 0.75rem;
  color: var(--color-text-dim);
}

/* ===================================================================
   定价卡片区 (Pricing Section: 3-Column Grid)
   =================================================================== */
.pricing-section {
  padding: 80px 0;
  position: relative;
}

.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: 40px 32px;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-smooth);
  position: relative;
  box-shadow: var(--shadow-card);
}

.pricing-card:hover {
  border-color: var(--color-border-bright);
  transform: translateY(-6px);
  box-shadow: 0 16px 40px -10px rgba(0, 0, 0, 0.7);
}

/* Featured Recommended Card */
.pricing-card.featured {
  background: linear-gradient(180deg, #162922 0%, #12211b 100%);
  border: 2px solid var(--color-emerald);
  box-shadow: 0 0 30px rgba(16, 185, 129, 0.25), 0 12px 36px rgba(0, 0, 0, 0.6);
  transform: scale(1.03);
  z-index: 2;
}

.pricing-card.featured:hover {
  transform: scale(1.03) translateY(-6px);
  box-shadow: 0 0 45px rgba(16, 185, 129, 0.4), 0 16px 48px rgba(0, 0, 0, 0.7);
}

.pricing-ribbon {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, #10b981 0%, #059669 100%);
  color: #04140d;
  font-size: 0.8rem;
  font-weight: 800;
  padding: 6px 18px;
  border-radius: var(--radius-full);
  box-shadow: 0 4px 15px rgba(16, 185, 129, 0.4);
  letter-spacing: 0.5px;
  white-space: nowrap;
}

.pricing-card-header {
  margin-bottom: 24px;
}

.pricing-plan-badge {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--color-text-dim);
  display: block;
  margin-bottom: 8px;
}

.pricing-plan-name {
  font-size: 1.55rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: 8px;
}

.pricing-plan-desc {
  font-size: 0.88rem;
  color: var(--color-text-muted);
  line-height: 1.6;
  min-height: 44px;
}

.pricing-price-box {
  display: flex;
  align-items: baseline;
  gap: 4px;
  padding-bottom: 24px;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--color-border);
}

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

.price-amount {
  font-size: 3.2rem;
  font-weight: 900;
  line-height: 1;
  color: #fff;
}

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

.pricing-features-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 32px;
  flex-grow: 1;
}

.pricing-features-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.5;
}

.pricing-features-list li svg {
  width: 17px;
  height: 17px;
  color: var(--color-emerald);
  flex-shrink: 0;
  margin-top: 3px;
}

.pricing-features-list li.highlight-item {
  color: var(--color-text-main);
}

.pricing-features-list li.highlight-item svg {
  color: var(--color-mint);
}

/* ===================================================================
   支持平台与客户端下载区 (Platforms Section)
   =================================================================== */
.download-section {
  padding: 80px 0;
  position: relative;
  background: linear-gradient(180deg, rgba(13, 21, 18, 0.4) 0%, transparent 100%);
}

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

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

.download-card:hover {
  background: var(--color-bg-card-hover);
  border-color: var(--color-border-emerald);
  transform: translateY(-6px);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.5), 0 0 18px rgba(16, 185, 129, 0.2);
}

.platform-icon-wrap {
  width: 64px;
  height: 64px;
  border-radius: 18px;
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid var(--color-border-emerald);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  color: var(--color-emerald);
  transition: all var(--transition-fast);
}

.download-card:hover .platform-icon-wrap {
  background: rgba(16, 185, 129, 0.2);
  color: var(--color-mint-light);
  transform: scale(1.08);
}

.platform-icon-wrap svg {
  width: 32px;
  height: 32px;
}

.platform-name {
  font-size: 1.25rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 6px;
}

.platform-tag {
  font-size: 0.78rem;
  color: var(--color-emerald);
  background: rgba(16, 185, 129, 0.1);
  padding: 2px 10px;
  border-radius: var(--radius-full);
  margin-bottom: 12px;
}

.platform-clients {
  font-size: 0.82rem;
  color: var(--color-text-muted);
  line-height: 1.5;
  margin-bottom: 22px;
  min-height: 38px;
}

/* ===================================================================
   深度特性解析区 (Why Choose Section - SEO, GEO, SERP Core)
   =================================================================== */
.why-section {
  padding: 80px 0;
  position: relative;
}

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

.why-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 28px 22px;
  transition: all var(--transition-smooth);
}

.why-card:hover {
  background: var(--color-bg-card-hover);
  border-color: var(--color-border-emerald);
  transform: translateY(-4px);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
}

.why-emoji {
  font-size: 2.2rem;
  margin-bottom: 16px;
  display: inline-block;
}

.why-card-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 10px;
}

.why-card-desc {
  font-size: 0.88rem;
  color: var(--color-text-muted);
  line-height: 1.65;
}

/* ===================================================================
   底部转化拦截区 (CTA Banner Section)
   =================================================================== */
.cta-banner-section {
  padding: 60px 0 80px;
}

.cta-banner-card {
  background: radial-gradient(circle at 50% 0%, rgba(16, 185, 129, 0.22) 0%, rgba(18, 31, 26, 0.98) 70%), var(--color-bg-card);
  border: 2px solid var(--color-emerald);
  border-radius: var(--radius-lg);
  padding: 60px 40px;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: 0 0 40px rgba(16, 185, 129, 0.25), var(--shadow-card);
}

.cta-banner-title {
  font-size: 2.4rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: 16px;
  line-height: 1.3;
}

.cta-banner-sub {
  font-size: 1.08rem;
  color: var(--color-text-muted);
  max-width: 660px;
  margin: 0 auto 32px;
  line-height: 1.7;
}

.cta-banner-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
}

/* ===================================================================
   用户评价跑马灯区 (Testimonials Marquee Section)
   =================================================================== */
.testimonials-section {
  padding: 80px 0;
  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-track:hover {
  animation-play-state: paused;
}

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

.testimonial-card {
  width: 360px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 16px;
  flex-shrink: 0;
  transition: all var(--transition-fast);
}

.testimonial-card:hover {
  border-color: var(--color-border-emerald);
  transform: translateY(-4px);
  background: var(--color-bg-card-hover);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
}

.rating-stars {
  color: #fbbf24;
  font-size: 1.1rem;
  letter-spacing: 2px;
}

.review-quote {
  font-size: 0.92rem;
  color: var(--color-text-main);
  line-height: 1.65;
  font-style: normal;
}

.reviewer-profile {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 8px;
}

.reviewer-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, #10b981 0%, #059669 100%);
  color: #04140d;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
}

.reviewer-name {
  font-size: 0.92rem;
  font-weight: 700;
  color: #fff;
}

.reviewer-role {
  font-size: 0.78rem;
  color: var(--color-text-dim);
}

/* ===================================================================
   常见问题解答区 (FAQ Section: Native details & summary)
   =================================================================== */
.faq-section {
  padding: 80px 0;
  position: relative;
}

.faq-list {
  max-width: 860px;
  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: var(--color-border-emerald);
  background: var(--color-bg-card-hover);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

.faq-summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px 26px;
  font-size: 1.05rem;
  font-weight: 700;
  color: #fff;
  cursor: pointer;
  list-style: none;
  user-select: none;
}

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

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

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

.faq-content {
  padding: 0 26px 24px;
  font-size: 0.95rem;
  color: var(--color-text-muted);
  line-height: 1.75;
}

.faq-content strong {
  color: var(--color-mint-light);
}

/* ===================================================================
   页脚 (Footer: Strictly Only 4 Specified Titles Opening in New Tabs)
   =================================================================== */
.footer {
  background: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border-bright);
  padding: 56px 0 36px;
  margin-top: 40px;
}

.footer-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 36px;
  border-bottom: 1px solid var(--color-border);
  flex-wrap: wrap;
  gap: 24px;
}

.footer-links-four {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
  flex-wrap: wrap;
}

.footer-link-item a {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-text-muted);
  padding: 4px 0;
  position: relative;
  transition: all var(--transition-fast);
}

.footer-link-item a::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-emerald);
  transition: width var(--transition-fast);
}

.footer-link-item a:hover {
  color: var(--color-emerald);
}

.footer-link-item a:hover::after {
  width: 100%;
}

.footer-bottom {
  padding-top: 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--color-text-dim);
  font-size: 0.85rem;
  flex-wrap: wrap;
  gap: 12px;
}

/* ===================================================================
   独立内容页面通用样式 (Page & Article Styles)
   =================================================================== */
.page-container {
  padding: 48px 0 80px;
}

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

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

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

.breadcrumb-nav span {
  color: var(--color-mint-light);
  font-weight: 500;
}

.page-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 48px 40px;
  box-shadow: var(--shadow-card);
}

.page-title {
  font-size: 2.3rem;
  font-weight: 900;
  color: #fff;
  margin-bottom: 12px;
  line-height: 1.3;
}

.page-meta {
  font-size: 0.88rem;
  color: var(--color-text-dim);
  margin-bottom: 36px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--color-border);
}

.page-content {
  font-size: 1rem;
  color: #d1d5db;
  line-height: 1.85;
}

.page-content h2 {
  font-size: 1.5rem;
  font-weight: 800;
  color: #fff;
  margin: 36px 0 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-border);
}

.page-content h3 {
  font-size: 1.22rem;
  font-weight: 700;
  color: var(--color-mint-light);
  margin: 24px 0 12px;
}

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

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

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

.page-content blockquote {
  border-left: 4px solid var(--color-emerald);
  background: rgba(16, 185, 129, 0.08);
  padding: 16px 20px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 24px 0;
  color: var(--color-text-main);
  font-style: normal;
}

.page-content strong {
  color: #fff;
}

.page-content a {
  color: var(--color-emerald);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-content a:hover {
  color: var(--color-mint-light);
}

.page-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 28px 0;
  background: rgba(9, 14, 12, 0.6);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.page-content th, .page-content td {
  padding: 12px 16px;
  border: 1px solid var(--color-border);
  text-align: left;
  font-size: 0.92rem;
}

.page-content th {
  background: rgba(18, 31, 26, 0.9);
  color: #fff;
  font-weight: 700;
}

/* ===================================================================
   资讯聚合页 (Recommend News Hub) 3-Column Grid
   =================================================================== */
.hub-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-top: 36px;
}

.article-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all var(--transition-smooth);
}

.article-card:hover {
  background: var(--color-bg-card-hover);
  border-color: var(--color-border-emerald);
  transform: translateY(-6px);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.5), 0 0 18px rgba(16, 185, 129, 0.2);
}

.article-card-tag {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--color-emerald);
  background: rgba(16, 185, 129, 0.1);
  padding: 3px 10px;
  border-radius: var(--radius-full);
  align-self: flex-start;
  margin-bottom: 14px;
}

.article-card-title {
  font-size: 1.22rem;
  font-weight: 700;
  color: #fff;
  line-height: 1.4;
  margin-bottom: 12px;
}

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

.article-card-excerpt {
  font-size: 0.88rem;
  color: var(--color-text-muted);
  line-height: 1.65;
  margin-bottom: 20px;
  flex-grow: 1;
}

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

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

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

@media (max-width: 1220px) {
  .nav-links {
    gap: 6px;
  }
  .nav-link {
    font-size: 0.82rem;
    padding: 5px 6px;
  }
  .brand-logo-img {
    height: 34px;
  }
  .nav-actions {
    gap: 6px;
  }
  .nav-actions .btn-sm {
    padding: 6px 10px;
    font-size: 0.8rem;
  }
}

@media (max-width: 1024px) {
  .nav-links, .nav-actions {
    display: none;
  }

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

  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
    text-align: center;
  }

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

  .hero-cta-group {
    justify-content: center;
  }

  .hero-trust-row {
    justify-content: center;
  }

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

  .media-ai-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);
  }

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

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

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

@media (max-width: 768px) {
  .hero-title {
    font-size: 2.3rem;
  }

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

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

  .art-shield-core {
    width: 110px;
    height: 110px;
    border-radius: 26px;
  }

  .art-shield-core svg {
    width: 38px;
    height: 38px;
  }

  .art-floating-badge {
    font-size: 0.72rem;
    padding: 6px 10px;
  }

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

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

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

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

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

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

  .footer-top {
    flex-direction: column;
    align-items: flex-start;
  }

  .footer-links-four {
    gap: 18px;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .page-card {
    padding: 32px 20px;
  }

  .page-title {
    font-size: 1.8rem;
  }

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

@media (max-width: 480px) {
  .hero-title {
    font-size: 1.95rem;
  }

  .hero-cta-group {
    flex-direction: column;
    width: 100%;
  }

  .hero-cta-group .btn {
    width: 100%;
  }

  .price-amount {
    font-size: 2.75rem;
  }

  .art-floating-badge {
    position: static;
    margin: 6px 0;
  }

  .hero-graphic-wrap {
    display: flex;
    flex-direction: column;
    align-items: center;
    aspect-ratio: auto;
  }

  .art-orbit-ring, .art-halo {
    display: none;
  }
}