/* ===== Design System: 潮核小方 Official Website ===== */

/* --- Google Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=Noto+Sans+SC:wght@300;400;500;600;700;900&display=swap');

/* --- CSS Custom Properties --- */
:root {
  /* Primary palette */
  --color-bg-deep: #050a18;
  --color-bg-primary: #0a0f2c;
  --color-bg-secondary: #0f1640;
  --color-bg-card: rgba(15, 22, 64, 0.6);
  --color-bg-card-hover: rgba(25, 35, 90, 0.7);

  /* Accent colors */
  --color-accent-cyan: #00e5ff;
  --color-accent-purple: #b366ff;
  --color-accent-blue: #4d7cff;
  --color-accent-pink: #ff6eb4;
  --color-accent-green: #00ffa3;

  /* Gradients */
  --gradient-hero: linear-gradient(135deg, #0a0f2c 0%, #1a1040 30%, #0d1a3a 70%, #050a18 100%);
  --gradient-accent: linear-gradient(135deg, var(--color-accent-cyan), var(--color-accent-purple));
  --gradient-btn: linear-gradient(135deg, var(--color-accent-cyan), var(--color-accent-blue));
  --gradient-card: linear-gradient(135deg, rgba(0, 229, 255, 0.08), rgba(179, 102, 255, 0.08));
  --gradient-glow: radial-gradient(ellipse at center, rgba(0, 229, 255, 0.15) 0%, transparent 70%);

  /* Text */
  --color-text-primary: #e8ecf4;
  --color-text-secondary: rgba(232, 236, 244, 0.7);
  --color-text-muted: rgba(232, 236, 244, 0.45);

  /* Borders */
  --border-glow: 1px solid rgba(0, 229, 255, 0.2);
  --border-subtle: 1px solid rgba(255, 255, 255, 0.06);

  /* Shadows */
  --shadow-glow-cyan: 0 0 30px rgba(0, 229, 255, 0.15);
  --shadow-glow-purple: 0 0 30px rgba(179, 102, 255, 0.15);
  --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
  --shadow-card-hover: 0 16px 48px rgba(0, 229, 255, 0.12);

  /* Spacing */
  --section-padding: 100px 0;
  --container-max: 1200px;
  --container-padding: 0 24px;

  /* Typography */
  --font-primary: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-size-hero: clamp(2.5rem, 6vw, 4.5rem);
  --font-size-h2: clamp(1.8rem, 4vw, 2.8rem);
  --font-size-h3: clamp(1.1rem, 2vw, 1.4rem);
  --font-size-body: 1rem;
  --font-size-small: 0.875rem;

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-medium: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);

  /* Border radius */
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
}

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

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

body {
  font-family: var(--font-primary);
  background: var(--color-bg-deep);
  color: var(--color-text-primary);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--color-accent-cyan);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-accent-purple);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

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

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

::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--color-accent-cyan), var(--color-accent-purple));
  border-radius: 3px;
}

/* --- Utility --- */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: var(--container-padding);
}

.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-header h2 {
  font-size: var(--font-size-h2);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-header p {
  font-size: 1.1rem;
  color: var(--color-text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

.section-tag {
  display: inline-block;
  font-size: var(--font-size-small);
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-accent-cyan);
  margin-bottom: 12px;
  padding: 4px 16px;
  border: 1px solid rgba(0, 229, 255, 0.3);
  border-radius: 20px;
  background: rgba(0, 229, 255, 0.06);
}

/* --- Scroll Animation Base --- */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }
.reveal-delay-5 { transition-delay: 0.5s; }

/* ===== NAVIGATION ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 16px 0;
  transition: all var(--transition-medium);
  backdrop-filter: blur(0px);
}

.navbar.scrolled {
  padding: 10px 0;
  background: rgba(5, 10, 24, 0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(0, 229, 255, 0.1);
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-logo {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  object-fit: cover;
  border: 2px solid rgba(0, 229, 255, 0.3);
  box-shadow: 0 0 12px rgba(0, 229, 255, 0.2);
}

.nav-brand-name {
  font-size: 1.3rem;
  font-weight: 700;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 36px;
}

.nav-links a {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  position: relative;
  padding: 4px 0;
  transition: color var(--transition-fast);
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-accent);
  border-radius: 1px;
  transition: width var(--transition-medium);
}

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

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-hamburger span {
  width: 24px;
  height: 2px;
  background: var(--color-text-primary);
  border-radius: 1px;
  transition: all var(--transition-fast);
}

/* ===== HERO SECTION ===== */
#hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: var(--gradient-hero);
  overflow: hidden;
}

.hero-bg-effects {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}

.hero-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  animation: orbFloat 8s ease-in-out infinite;
}

.hero-orb-1 {
  width: 500px;
  height: 500px;
  background: rgba(0, 229, 255, 0.08);
  top: -100px;
  right: -100px;
  animation-delay: 0s;
}

.hero-orb-2 {
  width: 400px;
  height: 400px;
  background: rgba(179, 102, 255, 0.08);
  bottom: -100px;
  left: -100px;
  animation-delay: -3s;
}

.hero-orb-3 {
  width: 300px;
  height: 300px;
  background: rgba(77, 124, 255, 0.06);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  animation-delay: -5s;
}

@keyframes orbFloat {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(30px, -30px) scale(1.05); }
  66% { transform: translate(-20px, 20px) scale(0.95); }
}

/* Grid lines background */
.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0, 229, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 229, 255, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  position: relative;
  z-index: 2;
  padding-top: 80px;
}

.hero-text {
  max-width: 560px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--color-accent-cyan);
  padding: 6px 18px;
  border: 1px solid rgba(0, 229, 255, 0.25);
  border-radius: 24px;
  background: rgba(0, 229, 255, 0.06);
  margin-bottom: 24px;
  animation: badgePulse 3s ease-in-out infinite;
}

@keyframes badgePulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(0, 229, 255, 0.2); }
  50% { box-shadow: 0 0 20px 4px rgba(0, 229, 255, 0.1); }
}

.hero-badge .pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-accent-green);
  animation: dotPulse 1.5s ease-in-out infinite;
}

@keyframes dotPulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

.hero-title {
  font-size: var(--font-size-hero);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
}

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

.hero-title .line-break {
  display: block;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--color-text-secondary);
  line-height: 1.8;
  margin-bottom: 36px;
}

.hero-cta-group {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 36px;
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-bg-deep);
  background: var(--gradient-btn);
  border: none;
  border-radius: 50px;
  cursor: pointer;
  transition: all var(--transition-medium);
  box-shadow: 0 4px 20px rgba(0, 229, 255, 0.3);
  text-decoration: none;
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 30px rgba(0, 229, 255, 0.4);
  color: var(--color-bg-deep);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 36px;
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text-primary);
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 50px;
  cursor: pointer;
  transition: all var(--transition-medium);
  text-decoration: none;
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(0, 229, 255, 0.4);
  transform: translateY(-3px);
  color: var(--color-text-primary);
}

.hero-image-wrapper {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-image-glow {
  position: absolute;
  width: 80%;
  height: 80%;
  background: radial-gradient(ellipse, rgba(0, 229, 255, 0.15), transparent 70%);
  filter: blur(60px);
  animation: heroGlow 4s ease-in-out infinite;
}

@keyframes heroGlow {
  0%, 100% { opacity: 0.6; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.1); }
}

.hero-product-img {
  position: relative;
  z-index: 2;
  max-width: 480px;
  width: 100%;
  border-radius: var(--radius-lg);
  animation: heroFloat 6s ease-in-out infinite;
}

@keyframes heroFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-15px); }
}

/* Floating tech badges around hero image */
.hero-float-badge {
  position: absolute;
  z-index: 3;
  background: rgba(15, 22, 64, 0.8);
  backdrop-filter: blur(16px);
  border: var(--border-glow);
  border-radius: var(--radius-md);
  padding: 10px 16px;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-text-primary);
  box-shadow: var(--shadow-glow-cyan);
  animation: floatBadge 5s ease-in-out infinite;
}

.hero-float-badge .badge-icon {
  font-size: 1.4rem;
}

.hero-float-badge:nth-child(3) {
  top: 10%;
  right: -10%;
  animation-delay: 0s;
}

.hero-float-badge:nth-child(4) {
  bottom: 20%;
  left: -5%;
  animation-delay: -2s;
}

.hero-float-badge:nth-child(5) {
  bottom: 5%;
  right: 5%;
  animation-delay: -4s;
}

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

/* Hero stats */
.hero-stats {
  display: flex;
  gap: 40px;
  margin-top: 48px;
  padding-top: 32px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

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

.hero-stat-value {
  font-size: 1.8rem;
  font-weight: 800;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-stat-label {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-top: 4px;
}

/* ===== FEATURES SECTION ===== */
#features {
  padding: var(--section-padding);
  position: relative;
}

#features::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 400px;
  height: 400px;
  background: var(--gradient-glow);
  pointer-events: none;
  opacity: 0.5;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}

.feature-card {
  position: relative;
  background: var(--gradient-card);
  border: var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 36px 30px;
  transition: all var(--transition-medium);
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-accent);
  opacity: 0;
  transition: opacity var(--transition-medium);
}

.feature-card:hover {
  background: var(--color-bg-card-hover);
  border-color: rgba(0, 229, 255, 0.15);
  transform: translateY(-6px);
  box-shadow: var(--shadow-card-hover);
}

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

.feature-icon-wrapper {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  margin-bottom: 20px;
  position: relative;
}

.feature-icon-wrapper.ai { background: rgba(0, 229, 255, 0.1); }
.feature-icon-wrapper.servo { background: rgba(179, 102, 255, 0.1); }
.feature-icon-wrapper.oled { background: rgba(77, 124, 255, 0.1); }
.feature-icon-wrapper.led { background: rgba(255, 110, 180, 0.1); }
.feature-icon-wrapper.role { background: rgba(0, 255, 163, 0.1); }

.feature-card h3 {
  font-size: var(--font-size-h3);
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--color-text-primary);
}

.feature-card p {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.feature-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 12px;
  margin-top: 16px;
  letter-spacing: 0.05em;
}

.feature-tag.ai { background: rgba(0, 229, 255, 0.1); color: var(--color-accent-cyan); }
.feature-tag.servo { background: rgba(179, 102, 255, 0.1); color: var(--color-accent-purple); }
.feature-tag.oled { background: rgba(77, 124, 255, 0.1); color: var(--color-accent-blue); }
.feature-tag.led { background: rgba(255, 110, 180, 0.1); color: var(--color-accent-pink); }
.feature-tag.role { background: rgba(0, 255, 163, 0.1); color: var(--color-accent-green); }

/* ===== ABOUT SECTION ===== */
#about {
  padding: var(--section-padding);
  position: relative;
  background: linear-gradient(180deg, transparent, rgba(0, 229, 255, 0.02), transparent);
}

.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.about-text-block h3 {
  font-size: 1.6rem;
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--color-text-primary);
}

.about-text-block p {
  font-size: 1rem;
  color: var(--color-text-secondary);
  margin-bottom: 16px;
  line-height: 1.8;
}

.about-highlights {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-top: 32px;
}

.highlight-item {
  background: var(--gradient-card);
  border: var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 24px;
  text-align: center;
  transition: all var(--transition-medium);
}

.highlight-item:hover {
  transform: translateY(-4px);
  border-color: rgba(0, 229, 255, 0.15);
  box-shadow: var(--shadow-glow-cyan);
}

.highlight-icon {
  font-size: 2rem;
  margin-bottom: 10px;
}

.highlight-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: 6px;
}

.highlight-desc {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.about-visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.about-logo-showcase {
  width: 280px;
  height: 280px;
  border-radius: 50%;
  background: var(--gradient-card);
  border: 2px solid rgba(0, 229, 255, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  box-shadow: 0 0 60px rgba(0, 229, 255, 0.08);
}

.about-logo-img {
  width: 160px;
  height: 160px;
  border-radius: 36px;
  object-fit: cover;
}

/* Rotating ring */
.about-ring {
  position: absolute;
  width: 340px;
  height: 340px;
  border: 1px dashed rgba(0, 229, 255, 0.15);
  border-radius: 50%;
  animation: ringRotate 25s linear infinite;
}

.about-ring::before {
  content: '';
  position: absolute;
  top: -4px;
  left: 50%;
  width: 8px;
  height: 8px;
  background: var(--color-accent-cyan);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--color-accent-cyan);
}

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

.about-ring-2 {
  width: 400px;
  height: 400px;
  border-color: rgba(179, 102, 255, 0.1);
  animation-direction: reverse;
  animation-duration: 35s;
}

.about-ring-2::before {
  background: var(--color-accent-purple);
  box-shadow: 0 0 10px var(--color-accent-purple);
}

/* ===== SPECS SECTION ===== */
#specs {
  padding: var(--section-padding);
  position: relative;
}

.specs-wrapper {
  background: var(--gradient-card);
  border: var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: 48px;
  position: relative;
  overflow: hidden;
}

.specs-wrapper::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-accent);
}

.specs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 32px;
}

.spec-item {
  text-align: center;
  padding: 24px;
  border-radius: var(--radius-md);
  transition: all var(--transition-medium);
}

.spec-item:hover {
  background: rgba(0, 229, 255, 0.04);
}

.spec-value {
  font-size: 2rem;
  font-weight: 800;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 8px;
}

.spec-label {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 600;
}

.spec-detail {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  margin-top: 6px;
}

/* ===== CONTACT SECTION ===== */
#contact {
  padding: var(--section-padding);
  position: relative;
}

#contact::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 400px;
  background: radial-gradient(ellipse, rgba(179, 102, 255, 0.08), transparent 70%);
  pointer-events: none;
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
  max-width: 900px;
  margin: 0 auto;
}

.contact-card {
  background: var(--gradient-card);
  border: var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  text-align: center;
  transition: all var(--transition-medium);
  position: relative;
  overflow: hidden;
}

.contact-card::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-accent);
  opacity: 0;
  transition: opacity var(--transition-medium);
}

.contact-card:hover {
  transform: translateY(-6px);
  border-color: rgba(0, 229, 255, 0.15);
  box-shadow: var(--shadow-card-hover);
}

.contact-card:hover::after {
  opacity: 1;
}

.contact-icon {
  font-size: 2.5rem;
  margin-bottom: 16px;
}

.contact-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--color-text-primary);
}

.contact-card p {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
}

.contact-card .contact-value {
  color: var(--color-accent-cyan);
  font-weight: 600;
  font-size: 1rem;
  margin-top: 4px;
  word-break: break-all;
}

/* ===== FOOTER ===== */
.site-footer {
  padding: 48px 0 32px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  background: rgba(5, 10, 24, 0.8);
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
  text-align: center;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.footer-logo {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  object-fit: cover;
}

.footer-brand-name {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-text-primary);
}

.footer-links {
  display: flex;
  gap: 32px;
  list-style: none;
}

.footer-links a {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

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

.footer-divider {
  width: 100%;
  max-width: 600px;
  height: 1px;
  background: rgba(255, 255, 255, 0.06);
}

.footer-meta {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}

.footer-meta p {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.footer-icp a {
  color: var(--color-text-muted);
  font-size: 0.8rem;
}

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

/* ===== CANVAS (Particle BG) ===== */
#particle-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

/* ===== MOBILE NAV OVERLAY ===== */
.mobile-nav-overlay {
  position: fixed;
  inset: 0;
  z-index: 999;
  background: rgba(5, 10, 24, 0.95);
  backdrop-filter: blur(20px);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-medium);
}

.mobile-nav-overlay.open {
  opacity: 1;
  visibility: visible;
}

.mobile-nav-links {
  list-style: none;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.mobile-nav-links a {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--color-text-primary);
}

.mobile-nav-close {
  position: absolute;
  top: 20px;
  right: 24px;
  background: none;
  border: none;
  font-size: 2rem;
  color: var(--color-text-primary);
  cursor: pointer;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .hero-content {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 40px;
  }

  .hero-text {
    max-width: 100%;
  }

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

  .hero-stats {
    justify-content: center;
  }

  .hero-image-wrapper {
    max-width: 400px;
    margin: 0 auto;
  }

  .hero-float-badge {
    display: none;
  }

  .about-content {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .about-visual {
    order: -1;
  }

  .about-highlights {
    max-width: 400px;
    margin: 32px auto 0;
  }
}

@media (max-width: 768px) {
  :root {
    --section-padding: 60px 0;
  }

  .nav-links {
    display: none;
  }

  .nav-hamburger {
    display: flex;
  }

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

  .specs-wrapper {
    padding: 32px 20px;
  }

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

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

  .hero-stats {
    gap: 24px;
    flex-wrap: wrap;
  }

  .footer-links {
    flex-wrap: wrap;
    justify-content: center;
    gap: 16px;
  }
}

@media (max-width: 480px) {
  .specs-grid {
    grid-template-columns: 1fr;
  }

  .about-highlights {
    grid-template-columns: 1fr;
  }

  .about-logo-showcase {
    width: 200px;
    height: 200px;
  }

  .about-logo-img {
    width: 100px;
    height: 100px;
    border-radius: 24px;
  }

  .about-ring {
    width: 260px;
    height: 260px;
  }

  .about-ring-2 {
    width: 310px;
    height: 310px;
  }
}