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

:root {
  --bg-primary: #0a0a12;
  --bg-secondary: #0e0e1a;
  --bg-card: #12121f;
  --bg-card-hover: #16162a;
  --text-primary: #e8e8f0;
  --text-secondary: #8888a8;
  --text-muted: #55556a;
  --accent-purple: #6c5ce7;
  --accent-cyan: #00f5d4;
  --accent-pink: #e84393;
  --gradient-main: linear-gradient(135deg, #6c5ce7 0%, #00f5d4 100%);
  --gradient-glow: linear-gradient(135deg, rgba(108, 92, 231, 0.15) 0%, rgba(0, 245, 212, 0.15) 100%);
  --border-subtle: rgba(255, 255, 255, 0.06);
  --border-accent: rgba(108, 92, 231, 0.3);
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

::selection {
  background: rgba(108, 92, 231, 0.4);
  color: #fff;
}

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

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

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 0 2rem;
  transition: background var(--transition-smooth), backdrop-filter var(--transition-smooth);
}

.navbar.scrolled {
  background: rgba(10, 10, 18, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-subtle);
}

.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.125rem;
  letter-spacing: -0.02em;
}

.logo-mark {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--gradient-main);
  color: #fff;
  font-weight: 800;
  font-size: 1rem;
}

.logo-text {
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--text-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 2rem;
}

.nav-links a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-main);
  border-radius: 1px;
  transition: width var(--transition-smooth);
}

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

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

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding: 6rem 2rem 4rem;
}

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

.glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.4;
}

.glow-1 {
  width: 600px;
  height: 600px;
  background: var(--accent-purple);
  top: -200px;
  right: -100px;
  opacity: 0.12;
  animation: float1 8s ease-in-out infinite;
}

.glow-2 {
  width: 500px;
  height: 500px;
  background: var(--accent-cyan);
  bottom: -150px;
  left: -100px;
  opacity: 0.08;
  animation: float2 10s ease-in-out infinite;
}

@keyframes float1 {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(-40px, 30px); }
}

@keyframes float2 {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(30px, -40px); }
}

.grid-overlay {
  position: absolute;
  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;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
}

.hero-content {
  position: relative;
  text-align: center;
  max-width: 800px;
}

.hero-tag {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent-cyan);
  margin-bottom: 1.5rem;
  padding: 6px 16px;
  border: 1px solid rgba(0, 245, 212, 0.2);
  border-radius: 100px;
  background: rgba(0, 245, 212, 0.05);
}

.hero-title {
  font-size: clamp(3rem, 8vw, 5.5rem);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.04em;
  margin-bottom: 1.5rem;
}

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

.hero-desc {
  font-size: 1.125rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 1rem;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}

.hero-domain {
  font-size: 1rem;
  color: var(--accent-cyan);
  margin-bottom: 2.5rem;
  font-weight: 500;
  letter-spacing: 0.02em;
}

.hide-mobile {
  display: inline;
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  font-size: 0.9375rem;
  font-weight: 600;
  color: #fff;
  background: var(--accent-purple);
  border-radius: 100px;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast);
}

.hero-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(108, 92, 231, 0.4);
  background: #7c6cf7;
}

.hero-cta svg {
  transition: transform var(--transition-fast);
}

.hero-cta:hover svg {
  transform: translateX(4px);
}

.scroll-hint {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
}

.scroll-line {
  width: 1px;
  height: 60px;
  background: linear-gradient(to bottom, var(--accent-purple), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
  0%, 100% { opacity: 0.3; transform: scaleY(1); }
  50% { opacity: 1; transform: scaleY(0.6); }
}

.section-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

.section-header {
  text-align: center;
  margin-bottom: 4rem;
}

.section-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent-purple);
  margin-bottom: 1rem;
}

.section-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 1rem;
}

.section-desc {
  font-size: 1.0625rem;
  color: var(--text-secondary);
  max-width: 480px;
  margin: 0 auto;
}

.works {
  padding: 8rem 0;
  position: relative;
}

.works::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-accent), transparent);
}

.works-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 3rem;
  max-width: 900px;
  margin: 0 auto;
}

.app-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: transform var(--transition-smooth), border-color var(--transition-smooth), box-shadow var(--transition-smooth);
  overflow: hidden;
}

.app-card:hover {
  transform: translateY(-8px);
  border-color: var(--border-accent);
  box-shadow: 0 20px 60px rgba(108, 92, 231, 0.1);
}

.card-glow {
  position: absolute;
  top: -80px;
  left: 50%;
  transform: translateX(-50%);
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: var(--accent-purple);
  filter: blur(80px);
  opacity: 0;
  transition: opacity var(--transition-slow);
  pointer-events: none;
}

.app-card:hover .card-glow {
  opacity: 0.08;
}

.phone-frame {
  position: relative;
  width: 200px;
  height: 400px;
  margin: 0 auto 2rem;
  background: var(--bg-primary);
  border-radius: 32px;
  border: 2px solid rgba(255, 255, 255, 0.08);
  overflow: hidden;
  box-shadow:
    0 0 0 1px rgba(255, 255, 255, 0.03),
    0 20px 50px rgba(0, 0, 0, 0.4);
}

.phone-notch {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100px;
  height: 24px;
  background: var(--bg-primary);
  border-radius: 0 0 16px 16px;
  z-index: 2;
}

.phone-screen {
  position: absolute;
  inset: 8px;
  border-radius: 26px;
  overflow: hidden;
  background: linear-gradient(180deg, #0f0f1e 0%, #1a1a2e 100%);
}

.screen-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  gap: 12px;
  color: var(--text-muted);
  font-size: 0.75rem;
}

.placeholder-icon {
  opacity: 0.5;
}

.screen-carousel {
  position: relative;
  height: 100%;
  overflow: hidden;
}

.carousel-img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity var(--transition-smooth);
}

.carousel-img.active {
  opacity: 1;
  position: relative;
}

.carousel-indicators {
  position: absolute;
  bottom: 12px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 6px;
  z-index: 2;
}

.indicator {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.4);
  transition: background var(--transition-fast), transform var(--transition-fast);
  cursor: pointer;
}

.indicator.active {
  background: var(--accent-cyan);
  transform: scale(1.2);
}

.card-info {
  text-align: center;
}

.card-title {
  font-size: 1.375rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 0.5rem;
}

.card-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 1rem;
}

.card-tags {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px;
}

.tag {
  font-size: 0.6875rem;
  font-weight: 500;
  padding: 4px 12px;
  border-radius: 100px;
  background: rgba(108, 92, 231, 0.1);
  color: var(--accent-purple);
  border: 1px solid rgba(108, 92, 231, 0.15);
}

.app-card:nth-child(2) .tag {
  background: rgba(0, 245, 212, 0.08);
  color: var(--accent-cyan);
  border-color: rgba(0, 245, 212, 0.15);
}

.advantages {
  padding: 8rem 0;
  position: relative;
  background: var(--bg-secondary);
}

.advantages::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-accent), transparent);
}

.adv-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.adv-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 2rem;
  transition: transform var(--transition-smooth), border-color var(--transition-smooth), box-shadow var(--transition-smooth);
}

.adv-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-accent);
  box-shadow: 0 12px 40px rgba(108, 92, 231, 0.08);
}

.adv-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: var(--gradient-glow);
  color: var(--accent-purple);
  margin-bottom: 1.25rem;
  border: 1px solid rgba(108, 92, 231, 0.15);
}

.adv-card:nth-child(2) .adv-icon {
  color: var(--accent-cyan);
  background: linear-gradient(135deg, rgba(0, 245, 212, 0.1) 0%, rgba(108, 92, 231, 0.1) 100%);
  border-color: rgba(0, 245, 212, 0.15);
}

.adv-card:nth-child(4) .adv-icon {
  color: var(--accent-cyan);
  background: linear-gradient(135deg, rgba(0, 245, 212, 0.1) 0%, rgba(108, 92, 231, 0.1) 100%);
  border-color: rgba(0, 245, 212, 0.15);
}

.adv-title {
  font-size: 1.0625rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: 0.625rem;
}

.adv-desc {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

.contact {
  padding: 8rem 0;
  position: relative;
}

.contact::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-accent), transparent);
}

.contact-content {
  text-align: center;
}

.contact-email {
  display: inline-block;
  font-size: clamp(1.25rem, 3vw, 2rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 2.5rem;
  transition: opacity var(--transition-fast);
}

.contact-email:hover {
  opacity: 0.8;
}

.social-links {
  display: flex;
  justify-content: center;
  gap: 1.25rem;
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 12px;
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  transition: color var(--transition-fast), border-color var(--transition-fast), background var(--transition-fast), transform var(--transition-fast);
}

.social-link:hover {
  color: var(--text-primary);
  border-color: var(--border-accent);
  background: rgba(108, 92, 231, 0.08);
  transform: translateY(-2px);
}

.footer {
  padding: 2rem;
  border-top: 1px solid var(--border-subtle);
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  text-align: center;
}

.footer p {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.beian-info {
  margin-top: 0.75rem;
}

.beian-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.75rem;
  color: var(--text-muted);
  transition: color var(--transition-fast);
}

.beian-link:hover {
  color: var(--text-secondary);
}

.beian-icon {
  width: 14px;
  height: 14px;
  display: block;
}

.reveal {
  opacity: 0;
  transform: translateY(30px);
  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);
}

@media (max-width: 1024px) {
  .adv-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-links {
    gap: 1.25rem;
  }

  .nav-links a {
    font-size: 0.8125rem;
  }

  .hero {
    padding: 5rem 1.5rem 3rem;
  }

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

  .hide-mobile {
    display: none;
  }

  .works-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
    max-width: 400px;
  }

  .phone-frame {
    width: 180px;
    height: 360px;
  }

  .section-inner {
    padding: 0 1.5rem;
  }

  .works,
  .advantages,
  .contact {
    padding: 5rem 0;
  }

  .section-header {
    margin-bottom: 3rem;
  }
}

@media (max-width: 480px) {
  .nav-inner {
    height: 60px;
  }

  .navbar {
    padding: 0 1rem;
  }

  .logo-text {
    display: none;
  }

  .nav-links {
    gap: 1rem;
  }

  .hero-title {
    font-size: 2.5rem;
  }

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

  .phone-frame {
    width: 160px;
    height: 320px;
  }

  .app-card {
    padding: 1.5rem;
  }

  .section-inner {
    padding: 0 1rem;
  }
}