/* ═══════════════════════════════════════════════════════════════════════
   高效臭氧催化剂 - Main Stylesheet
   Inspired by Marvis (marvis.qq.com) Dark Tech Aesthetic
   ═══════════════════════════════════════════════════════════════════════ */

/* ─── CSS Variables ──────────────────────────────────────────────────── */
:root {
  --bg-primary: #06080d;
  --bg-secondary: #0a0e17;
  --bg-card: #0d1220;
  --bg-card-hover: #111827;
  --bg-glass: rgba(13, 18, 32, 0.85);
  --border-color: rgba(255, 255, 255, 0.06);
  --border-hover: rgba(255, 255, 255, 0.12);
  --text-primary: #e8eaed;
  --text-secondary: #8b8fa3;
  --text-muted: #5c6072;
  --accent-blue: #00b4d8;
  --accent-cyan: #00d4ff;
  --accent-purple: #7b61ff;
  --accent-violet: #9b6dff;
  --accent-gradient: linear-gradient(135deg, #00d4ff, #7b61ff);
  --accent-gradient-warm: linear-gradient(135deg, #7b61ff, #f472b6);
  --success: #22c55e;
  --warning: #f59e0b;
  --danger: #ef4444;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --shadow-glow: 0 0 20px rgba(0, 212, 255, 0.1);
  --shadow-glow-strong: 0 0 40px rgba(123, 97, 255, 0.15);
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', 'JetBrains Mono', monospace;
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

/* ─── Ambient Background Effects ─────────────────────────────────────── */
.ambient-bg {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}

.ambient-glow-top {
  position: absolute;
  top: -20%;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 600px;
  background: radial-gradient(ellipse at center, rgba(0, 212, 255, 0.06) 0%, transparent 70%);
  animation: ambient-pulse 8s ease-in-out infinite;
}

.ambient-glow-bottom {
  position: absolute;
  bottom: -20%;
  right: -10%;
  width: 600px;
  height: 500px;
  background: radial-gradient(ellipse at center, rgba(123, 97, 255, 0.05) 0%, transparent 70%);
  animation: ambient-pulse 10s ease-in-out infinite reverse;
}

@keyframes ambient-pulse {
  0%, 100% { opacity: 0.5; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.1); }
}

/* ─── Grid Background ────────────────────────────────────────────────── */
.grid-bg {
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
  z-index: 0;
  mask-image: radial-gradient(ellipse at 50% 0%, black 30%, transparent 70%);
}

/* ─── Container ──────────────────────────────────────────────────────── */
.container {
  position: relative;
  z-index: 1;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ─── Navigation ─────────────────────────────────────────────────────── */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 16px 0;
  transition: var(--transition-normal);
}

.nav.scrolled {
  background: rgba(6, 8, 13, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  padding: 10px 0;
}

.nav-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text-primary);
}

.nav-logo {
  width: 40px;
  height: 40px;
  filter: drop-shadow(0 0 8px rgba(0, 212, 255, 0.3));
  transition: var(--transition-normal);
}

.nav-brand:hover .nav-logo {
  filter: drop-shadow(0 0 16px rgba(0, 212, 255, 0.5));
  transform: scale(1.05);
}

.nav-title {
  font-size: 18px;
  font-weight: 700;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  transition: var(--transition-fast);
  position: relative;
}

.nav-links a:hover {
  color: var(--text-primary);
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 1.5px;
  background: var(--accent-gradient);
  border-radius: 1px;
  transform: scaleX(0);
  transition: transform var(--transition-fast);
}

.nav-links a:hover::after {
  transform: scaleX(1);
}

.nav-cta {
  background: var(--accent-gradient);
  color: #fff !important;
  padding: 8px 20px;
  border-radius: 24px;
  font-weight: 600 !important;
  transition: var(--transition-normal) !important;
  box-shadow: 0 0 20px rgba(0, 212, 255, 0.2);
}

.nav-cta:hover {
  box-shadow: 0 0 30px rgba(0, 212, 255, 0.35);
  transform: translateY(-1px);
}

.nav-cta::after { display: none !important; }

/* ─── Hero Section ───────────────────────────────────────────────────── */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 120px 24px 80px;
  overflow: hidden;
}

/* Hero background image */
.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-bg-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

/* Dark gradient overlay for text readability */
.hero-overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    linear-gradient(180deg,
      rgba(6, 8, 13, 0.3) 0%,
      rgba(6, 8, 13, 0.55) 40%,
      rgba(6, 8, 13, 0.7) 70%,
      rgba(6, 8, 13, 0.9) 100%
    );
  pointer-events: none;
}

/* Hero content layered above background */
.hero-content {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  border-radius: 24px;
  padding: 6px 16px;
  font-size: 13px;
  color: var(--accent-cyan);
  margin-bottom: 32px;
  backdrop-filter: blur(10px);
}

.hero-badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-cyan);
  animation: dot-pulse 2s ease-in-out infinite;
}

@keyframes dot-pulse {
  0%, 100% { opacity: 1; box-shadow: 0 0 4px var(--accent-cyan); }
  50% { opacity: 0.5; box-shadow: 0 0 8px var(--accent-cyan); }
}

.hero-title {
  font-size: clamp(42px, 6vw, 72px);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 24px;
  background: linear-gradient(135deg, #00d4ff 0%, #9b6dff 40%, #f472b6 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 18px;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 40px;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 28px;
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: var(--transition-normal);
  font-family: var(--font-sans);
}

.btn-primary {
  background: var(--accent-gradient);
  color: #fff;
  box-shadow: 0 0 24px rgba(0, 212, 255, 0.2);
}

.btn-primary:hover {
  box-shadow: 0 0 36px rgba(0, 212, 255, 0.35);
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.btn-outline:hover {
  border-color: rgba(255, 255, 255, 0.35);
  background: rgba(255, 255, 255, 0.03);
}

.btn-xs {
  padding: 4px 12px;
  font-size: 12px;
  border-radius: 16px;
}

.btn-sm {
  padding: 8px 18px;
  font-size: 13px;
  border-radius: 20px;
}

/* ─── Hero Stats ─────────────────────────────────────────────────────── */
.hero-stats {
  display: flex;
  justify-content: center;
  gap: 48px;
  margin-top: 64px;
  flex-wrap: wrap;
}

.hero-stat {
  text-align: center;
}

.hero-stat-value {
  font-size: 36px;
  font-weight: 800;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
}

.hero-stat-label {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 6px;
}

/* ─── Sections ───────────────────────────────────────────────────────── */
.section {
  padding: 100px 0;
  position: relative;
  z-index: 1;
}

.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-badge {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  color: var(--accent-cyan);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: 16px;
  padding: 4px 12px;
  border: 1px solid rgba(0, 212, 255, 0.15);
  border-radius: 12px;
  background: rgba(0, 212, 255, 0.04);
}

.section-title {
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.section-desc {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 560px;
  margin: 0 auto;
}

/* ─── Product Cards ──────────────────────────────────────────────────── */
.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
  gap: 24px;
}

.product-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  cursor: pointer;
  text-decoration: none;
  color: var(--text-primary);
  display: block;
  transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1),
              border-color 0.35s cubic-bezier(0.4, 0, 0.2, 1),
              box-shadow 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

.product-card:hover {
  border-color: rgba(0, 212, 255, 0.25);
  transform: scale(1.02) translateY(-2px);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.4),
              0 0 40px rgba(0, 212, 255, 0.08),
              inset 0 1px 0 rgba(255, 255, 255, 0.03);
}

/* ─── Product Card Image & Hover FX ─────────────────────────────────── */

.product-card-image {
  width: 100%;
  height: 220px;
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, #080c1a 0%, #0a0e22 50%, #0c1028 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  border-bottom: 1px solid var(--border-color);
}

.product-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.55s cubic-bezier(0.25, 0.1, 0.25, 1);
  will-change: transform;
}

/* Image rotate + catalytic glow on hover */
.product-card:hover .product-card-image img {
  transform: scale(1.06) rotate(3deg);
}

/* Catalytic glow overlay – appears on hover */
.product-card-image::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(
    ellipse at 45% 55%,
    rgba(0, 212, 255, 0.12) 0%,
    rgba(123, 97, 255, 0.04) 40%,
    transparent 70%
  );
  opacity: 0;
  transition: opacity 0.55s cubic-bezier(0.25, 0.1, 0.25, 1);
  pointer-events: none;
  z-index: 2;
}

.product-card:hover .product-card-image::after {
  opacity: 1;
  animation: catalytic-breath 2.8s ease-in-out infinite;
}

@keyframes catalytic-breath {
  0%, 100% { opacity: 0.4; }
  50% { opacity: 0.85; }
}

/* Floating particle dots – subtle bokeh overlay */
.product-card-image::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(1px 1px at 15% 25%, rgba(0, 212, 255, 0.6) 0%, transparent 100%),
    radial-gradient(1.5px 1.5px at 75% 20%, rgba(123, 97, 255, 0.5) 0%, transparent 100%),
    radial-gradient(1px 1px at 30% 70%, rgba(0, 212, 255, 0.4) 0%, transparent 100%),
    radial-gradient(1.5px 1.5px at 60% 80%, rgba(0, 212, 255, 0.5) 0%, transparent 100%),
    radial-gradient(1px 1px at 85% 50%, rgba(123, 97, 255, 0.35) 0%, transparent 100%),
    radial-gradient(0.8px 0.8px at 50% 15%, rgba(0, 212, 255, 0.45) 0%, transparent 100%);
  opacity: 0;
  transition: opacity 0.55s ease;
  pointer-events: none;
  z-index: 3;
}

.product-card:hover .product-card-image::before {
  opacity: 0.7;
  animation: particles-float 4s ease-in-out infinite;
}

@keyframes particles-float {
  0% { transform: translateY(0); opacity: 0.5; }
  25% { transform: translateY(-4px); opacity: 0.8; }
  50% { transform: translateY(-8px); opacity: 0.6; }
  75% { transform: translateY(-3px); opacity: 0.7; }
  100% { transform: translateY(0); opacity: 0.5; }
}

/* Streaming fluid light line – subtle animated gradient bar */
.product-card-image .stream-line {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(0, 212, 255, 0.4) 20%,
    rgba(0, 212, 255, 0.7) 50%,
    rgba(0, 212, 255, 0.4) 80%,
    transparent 100%
  );
  opacity: 0;
  transition: opacity 0.35s ease;
  z-index: 4;
  pointer-events: none;
}

.product-card:hover .product-card-image .stream-line {
  opacity: 1;
  animation: stream-flow 2s ease-in-out infinite;
}

@keyframes stream-flow {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

/* ─── Product Card Body ──────────────────────────────────────────────── */
.product-card-body {
  padding: 28px;
  position: relative;
  z-index: 1;
}

.product-card-model {
  font-size: 12px;
  color: var(--accent-cyan);
  font-weight: 600;
  margin-bottom: 8px;
  font-family: var(--font-mono);
}

.product-card-title {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 12px;
  line-height: 1.3;
}

.product-card-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 20px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.product-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 500;
  background: rgba(0, 212, 255, 0.08);
  color: var(--accent-cyan);
  border: 1px solid rgba(0, 212, 255, 0.1);
}

.tag-purple {
  background: rgba(123, 97, 255, 0.08);
  color: var(--accent-purple);
  border-color: rgba(123, 97, 255, 0.1);
}

/* ─── Features Grid ──────────────────────────────────────────────────── */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 32px;
  transition: var(--transition-normal);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0 14px;
}

.feature-card:hover {
  border-color: rgba(0, 212, 255, 0.15);
  background: var(--bg-card-hover);
}

.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background: rgba(0, 212, 255, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 22px;
  color: var(--accent-cyan);
}

.feature-card h3 {
  font-size: 16px;
  font-weight: 600;
  flex: 1;
  min-width: 0;
}

.feature-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  flex-basis: 100%;
  margin-top: 12px;
  margin-bottom: 0;
}

/* ─── Product Hero Banner ────────────────────────────────────────────── */
.product-hero {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  text-align: center;
  overflow: hidden;
  padding-top: 160px;
  padding-bottom: 0;
  min-height: auto;
}

.product-hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.product-hero-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.product-hero-overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    linear-gradient(180deg,
      rgba(6, 8, 13, 0.15) 0%,
      rgba(6, 8, 13, 0.35) 25%,
      rgba(6, 8, 13, 0.65) 55%,
      rgba(6, 8, 13, 0.9) 80%,
      rgba(6, 8, 13, 0.99) 95%,
      var(--bg-primary) 100%
    );
  pointer-events: none;
}

.product-hero-content {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: 960px;
  margin: 0 auto;
  padding: 0 24px 60px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.product-hero-title {
  font-size: clamp(34px, 5vw, 56px);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
  background: linear-gradient(135deg, #ffffff 0%, #a0d8ef 40%, #c4b5fd 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.product-hero-subtitle {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 560px;
  margin: 0 auto 48px;
  line-height: 1.7;
}

/* Summary card overlaid at bottom of hero */
.product-hero-summary {
  text-align: left;
  max-width: 780px;
  width: 100%;
  margin-top: 0;
}

.product-hero-summary > p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.85;
  text-align: center;
  max-width: 680px;
  margin: 0 auto;
}

/* ─── Product Detail Page ───────────────────────────────────────────── */
.product-detail {
  padding: 40px 0 80px;
  position: relative;
  z-index: 1;
  background: var(--bg-primary);
}

.product-detail-header {
  text-align: center;
  margin-bottom: 48px;
}

.product-detail-model {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--accent-cyan);
  font-weight: 600;
  margin-bottom: 8px;
}

.product-detail-title {
  font-size: clamp(32px, 5vw, 48px);
  font-weight: 800;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.product-detail-subtitle {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

.product-detail-summary {
  max-width: 800px;
  margin: 0 auto 48px;
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.8;
  text-align: center;
}

.product-nav {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-bottom: 48px;
  flex-wrap: wrap;
}

.product-nav-item {
  padding: 8px 20px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  cursor: pointer;
  transition: var(--transition-fast);
  text-decoration: none;
}

.product-nav-item:hover,
.product-nav-item.active {
  color: var(--accent-cyan);
  border-color: rgba(0, 212, 255, 0.3);
  background: rgba(0, 212, 255, 0.06);
}

/* Specs Table */
.specs-section {
  margin-bottom: 64px;
}

.specs-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  overflow: hidden;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

.specs-table th,
.specs-table td {
  padding: 14px 24px;
  text-align: left;
  font-size: 14px;
  border-bottom: 1px solid var(--border-color);
}

.specs-table th {
  background: rgba(0, 212, 255, 0.04);
  color: var(--accent-cyan);
  font-weight: 600;
  width: 180px;
  font-size: 13px;
}

.specs-table td {
  color: var(--text-primary);
}

.specs-table tr:last-child td,
.specs-table tr:last-child th {
  border-bottom: none;
}

/* Advantages Grid */
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 20px;
  margin-bottom: 64px;
}

.advantage-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 28px;
  transition: var(--transition-normal);
}

.advantage-card:hover {
  border-color: rgba(0, 212, 255, 0.15);
}

.advantage-number {
  font-family: var(--font-mono);
  font-size: 32px;
  font-weight: 800;
  color: rgba(0, 212, 255, 0.1);
  margin-bottom: 16px;
  line-height: 1;
}

.advantage-card h3 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 10px;
}

.advantage-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* Application Tags */
.applications-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 64px;
  justify-content: center;
}

.application-tag {
  padding: 8px 20px;
  border-radius: 24px;
  font-size: 13px;
  font-weight: 500;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  transition: var(--transition-fast);
}

.application-tag:hover {
  border-color: rgba(0, 212, 255, 0.25);
  color: var(--accent-cyan);
  background: rgba(0, 212, 255, 0.04);
}

/* Cases */
.cases-section {
  margin-bottom: 64px;
}

.case-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 32px;
  margin-bottom: 20px;
}

/* Inner layout: text left 2/3, images right 1/3 */
.case-card-inner {
  display: flex;
  gap: 28px;
  align-items: flex-start;
}

.case-card-text {
  flex: 2;
  min-width: 0;
}

.case-card-text h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--accent-cyan);
}

.case-card-text p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 12px;
}

.case-params {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--accent-purple);
  padding: 12px 16px;
  background: rgba(123, 97, 255, 0.05);
  border-radius: var(--radius-sm);
  border: 1px solid rgba(123, 97, 255, 0.1);
}

/* Case Comparison Images - right 1/3 area */
.case-compare {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-width: 140px;
}

.case-compare-item {
  position: relative;
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--bg-card);
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow:
    0 0 0 1px rgba(0, 212, 255, 0.06),
    0 4px 16px rgba(0, 0, 0, 0.3);
  transition: box-shadow 0.3s ease, border-color 0.3s ease;
}

.case-compare-item:hover {
  border-color: rgba(0, 212, 255, 0.2);
  box-shadow:
    0 0 0 1px rgba(0, 212, 255, 0.12),
    0 0 20px rgba(0, 212, 255, 0.06),
    0 6px 24px rgba(0, 0, 0, 0.35);
}

.case-compare-item img {
  width: 100%;
  height: 90px;
  object-fit: contain;
  display: block;
  background: var(--bg-secondary);
  transition: transform 0.35s ease;
}

.case-compare-item:hover img {
  transform: scale(1.05);
}

.case-compare-label {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 5px 10px;
  font-size: 11px;
  font-weight: 600;
  text-align: center;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  background: rgba(6, 8, 13, 0.85);
  backdrop-filter: blur(6px);
  color: var(--text-muted);
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.case-compare-label.after {
  color: var(--accent-cyan);
  background: rgba(0, 212, 255, 0.06);
  border-top-color: rgba(0, 212, 255, 0.1);
}

}
@media (max-width: 768px) {
  .case-card-inner {
    flex-direction: column;
    gap: 16px;
  }

  .case-compare {
    flex-direction: row;
    gap: 8px;
  }

  .case-compare-item img {
    height: 80px;
  }
}
.content-text {
  max-width: 800px;
  margin: 0 auto 64px;
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.9;
}

.content-text p {
  margin-bottom: 16px;
}

/* ─── About Section ──────────────────────────────────────────────────── */
.about-section {
  text-align: center;
  padding: 80px 0;
}

/* ─── CTA Section ────────────────────────────────────────────────────── */
.cta-section {
  text-align: center;
  padding: 100px 0;
  position: relative;
}

.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, rgba(0, 212, 255, 0.05) 0%, transparent 70%);
  pointer-events: none;
}

.cta-section .section-title {
  margin-bottom: 12px;
}

.cta-section .section-desc {
  margin-bottom: 32px;
}

/* ─── Footer ─────────────────────────────────────────────────────────── */
.footer {
  border-top: 1px solid var(--border-color);
  padding: 48px 0;
  position: relative;
  z-index: 1;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 24px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.footer-logo {
  width: 28px;
  height: 28px;
}

.footer-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
}

.footer-copy {
  font-size: 13px;
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  gap: 24px;
  list-style: none;
}

.footer-links a {
  font-size: 13px;
  color: var(--text-muted);
  text-decoration: none;
  transition: var(--transition-fast);
}

.footer-links a:hover {
  color: var(--text-primary);
}

/* ─── Animations ─────────────────────────────────────────────────────── */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  animation: fadeInUp 0.6s ease forwards;
}

.fade-in:nth-child(2) { animation-delay: 0.1s; }
.fade-in:nth-child(3) { animation-delay: 0.2s; }
.fade-in:nth-child(4) { animation-delay: 0.3s; }
.fade-in:nth-child(5) { animation-delay: 0.4s; }
.fade-in:nth-child(6) { animation-delay: 0.5s; }

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

/* ─── Responsive ─────────────────────────────────────────────────────── */
@media (max-width: 768px) {
  .nav-links {
    gap: 20px;
  }

  .nav-links a {
    font-size: 13px;
  }

  .hero {
    min-height: 100vh;
    padding: 100px 16px 60px;
  }

  .hero-bg-img {
    object-position: 55% center;
  }

  .hero-overlay {
    background:
      linear-gradient(180deg,
        rgba(6, 8, 13, 0.4) 0%,
        rgba(6, 8, 13, 0.6) 35%,
        rgba(6, 8, 13, 0.75) 65%,
        rgba(6, 8, 13, 0.92) 100%
      );
  }

  .hero-title {
    font-size: 36px;
  }

  .hero-subtitle {
    font-size: 15px;
  }

  .hero-stats {
    gap: 28px;
  }

  .hero-stat-value {
    font-size: 28px;
  }

  .product-hero {
    padding-top: 120px;
  }

  .product-hero-title {
    font-size: 28px;
  }

  .product-hero-subtitle {
    font-size: 14px;
    margin-bottom: 32px;
  }

  .product-hero-content {
    padding-bottom: 40px;
  }

  .product-detail {
    padding: 32px 0 60px;
  }

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

  /* Reduce hover animations on mobile */
  .product-card:hover {
    transform: scale(1.01);
  }

  .product-card:hover .product-card-image img {
    transform: scale(1.03) rotate(1.5deg);
  }

  .product-card-image::after {
    transition: opacity 0.25s ease;
  }

  .specs-table th {
    width: 120px;
  }

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

  .section {
    padding: 60px 0;
  }
}

/* ─── Scrollbar ──────────────────────────────────────────────────────── */
::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.15);
}

/* ─── Selection ──────────────────────────────────────────────────────── */
::selection {
  background: rgba(0, 212, 255, 0.2);
  color: #fff;
}