:root {
  --pink-50: #fff5f7;
  --pink-100: #ffe6eb;
  --pink-200: #ffd0db;
  --pink-300: #ffaebf;
  --pink-400: #ff7a96;
  --pink-500: #f94c73;
  --pink-600: #e0345b;
  --pink-700: #b82346;
  --purple-50: #f8f6ff;
  --purple-100: #ede9ff;
  --purple-200: #dcd3ff;
  --purple-300: #c2b0ff;
  --purple-400: #a386f0;
  --purple-500: #855cf8;
  --purple-600: #6d3de0;
  --purple-700: #4f27b8;
  --gray-50: #f9fafb;
  --gray-100: #f2f4f6;
  --gray-200: #e8eaed;
  --gray-300: #d1d5db;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-900: #111827;
  --shadow-sm: 0 2px 8px rgba(17,24,39,0.04);
  --shadow-md: 0 12px 32px rgba(249,76,115,0.10);
  --shadow-lg: 0 24px 56px rgba(249,76,115,0.16);
  --shadow-purple: 0 16px 40px rgba(133,92,248,0.20);
  --shadow-card: 0 4px 24px rgba(17,24,39,0.06);
  --radius: 24px;
  --radius-sm: 16px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: var(--gray-900);
  background: #fff;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 32px;
}

/* Reveal animations */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

/* Header */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(255,255,255,0.85);
  backdrop-filter: saturate(180%) blur(16px);
  border-bottom: 1px solid rgba(255,220,227,0.6);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  font-size: 1.35rem;
  color: var(--gray-900);
  letter-spacing: -0.02em;
}

.brand-logo {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  object-fit: cover;
  box-shadow: var(--shadow-sm);
}

.main-nav {
  display: flex;
  gap: 40px;
  font-size: 0.95rem;
  color: var(--gray-600);
}

.main-nav a {
  position: relative;
  padding: 6px 0;
  transition: color 0.2s;
}

.main-nav a::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--pink-500), var(--purple-500));
  border-radius: 2px;
  transition: width 0.25s;
}

.main-nav a:hover {
  color: var(--gray-900);
}

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

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 32px;
  height: 32px;
  background: transparent;
  border: none;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  height: 2px;
  background: var(--gray-700);
  border-radius: 2px;
  transition: 0.3s;
}

.nav-toggle span:nth-child(1) { width: 100%; }
.nav-toggle span:nth-child(2) { width: 75%; }
.nav-toggle span:nth-child(3) { width: 50%; }

/* Hero */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 140px 0 120px;
  background: linear-gradient(135deg, #fff 0%, var(--pink-50) 30%, #faf8ff 60%, var(--purple-50) 100%);
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  top: 10%;
  right: -8%;
  width: 560px;
  height: 560px;
  background: radial-gradient(circle, rgba(249,76,115,0.16) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
  filter: blur(20px);
}

.hero::after {
  content: "";
  position: absolute;
  bottom: -10%;
  left: -10%;
  width: 480px;
  height: 480px;
  background: radial-gradient(circle, rgba(133,92,248,0.14) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
  filter: blur(20px);
}

.hero-inner {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 80px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-copy h1 {
  font-size: 3.6rem;
  line-height: 1.15;
  font-weight: 800;
  color: var(--gray-900);
  margin-bottom: 28px;
  letter-spacing: -0.03em;
}

.hero-copy h1 em {
  background: linear-gradient(135deg, var(--pink-600), var(--purple-600));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-style: normal;
}

.hero-lead {
  font-size: 1.25rem;
  color: var(--gray-600);
  margin-bottom: 44px;
  max-width: 520px;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: 20px;
  margin-bottom: 56px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 16px 36px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 1.05rem;
  transition: transform 0.25s, box-shadow 0.25s;
}

.btn:hover {
  transform: translateY(-3px);
}

.btn-primary {
  background: linear-gradient(135deg, var(--pink-500), var(--purple-500));
  color: #fff;
  box-shadow: 0 12px 28px rgba(249,76,115,0.28);
}

.btn-primary:hover {
  box-shadow: 0 18px 40px rgba(133,92,248,0.35);
}

.btn-secondary {
  background: rgba(255,255,255,0.8);
  color: var(--gray-700);
  border: 1px solid var(--gray-200);
  backdrop-filter: blur(8px);
}

.btn-secondary:hover {
  border-color: var(--purple-300);
  color: var(--purple-600);
}

.hero-stats {
  display: flex;
  gap: 56px;
}

.hero-stats div {
  display: flex;
  flex-direction: column;
}

.hero-stats strong {
  font-size: 1.15rem;
  color: var(--gray-900);
  font-weight: 700;
  margin-bottom: 4px;
}

.hero-stats span {
  font-size: 0.9rem;
  color: var(--gray-500);
}

/* Phone frame */
.phone-frame {
  position: relative;
  width: 320px;
  margin: 0 auto;
  border-radius: 44px;
  padding: 12px;
  background: linear-gradient(145deg, #fff, var(--purple-100));
  box-shadow:
    0 0 0 1px rgba(133,92,248,0.08) inset,
    0 32px 80px rgba(133,92,248,0.22),
    0 16px 32px rgba(0,0,0,0.06);
  animation: float 6s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

.phone-frame::before {
  content: "";
  position: absolute;
  top: 16px;
  left: 50%;
  transform: translateX(-50%);
  width: 90px;
  height: 26px;
  background: #fff;
  border-radius: 14px;
  z-index: 2;
}

.phone-frame img {
  width: 100%;
  display: block;
  border-radius: 34px;
  border: 5px solid #fff;
}

.hero-visual {
  display: flex;
  justify-content: center;
}

/* Sections */
.section-title {
  font-size: 2.4rem;
  font-weight: 800;
  text-align: center;
  margin-bottom: 16px;
  color: var(--gray-900);
  letter-spacing: -0.02em;
}

.section-subtitle {
  text-align: center;
  color: var(--gray-500);
  max-width: 620px;
  margin: 0 auto 64px;
  font-size: 1.15rem;
  line-height: 1.8;
}

/* Features */
.features {
  padding: 140px 0;
  background: #fff;
}

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

.feature-card {
  background: #fff;
  border: 1px solid var(--gray-100);
  border-radius: var(--radius);
  padding: 40px 32px;
  transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s;
}

.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-purple);
  border-color: var(--purple-200);
}

.feature-icon {
  width: 60px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  background: linear-gradient(135deg, var(--pink-50), var(--purple-100));
  border-radius: 18px;
  margin-bottom: 24px;
  box-shadow: var(--shadow-sm);
}

.feature-card h3 {
  font-size: 1.25rem;
  margin-bottom: 12px;
  color: var(--gray-900);
  font-weight: 700;
}

.feature-card p {
  font-size: 1rem;
  color: var(--gray-600);
  line-height: 1.8;
}

/* Showcase */
.showcase {
  padding: 140px 0;
  background: linear-gradient(180deg, #fff 0%, var(--purple-50) 100%);
}

.showcase-inner {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 80px;
  align-items: center;
}

.showcase-screens {
  display: flex;
  justify-content: center;
  gap: 24px;
  flex-wrap: wrap;
}

.phone-frame.small {
  width: 200px;
  border-radius: 32px;
  padding: 10px;
  animation: none;
}

.phone-frame.small::before {
  width: 64px;
  height: 18px;
  top: 14px;
}

.phone-frame.small img {
  border-radius: 24px;
}

.showcase-copy h2 {
  font-size: 2.4rem;
  margin-bottom: 24px;
  color: var(--gray-900);
  letter-spacing: -0.02em;
  line-height: 1.25;
}

.showcase-copy p {
  color: var(--gray-600);
  margin-bottom: 32px;
  font-size: 1.1rem;
  line-height: 1.9;
}

.showcase-copy ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.showcase-copy li {
  position: relative;
  padding-left: 36px;
  color: var(--gray-700);
  font-size: 1.05rem;
  line-height: 1.7;
}

.showcase-copy li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 0;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  background: linear-gradient(135deg, var(--pink-500), var(--purple-500));
  border-radius: 50%;
  font-size: 0.8rem;
  font-weight: 700;
}

/* Download */
.download {
  padding: 140px 0;
  background: #fff;
}

.download-inner {
  text-align: center;
}

.download-grid {
  display: flex;
  justify-content: center;
  gap: 28px;
  flex-wrap: wrap;
}

.download-card {
  display: flex;
  align-items: center;
  gap: 18px;
  min-width: 260px;
  padding: 22px 32px;
  border-radius: var(--radius-sm);
  background: var(--gray-900);
  color: #fff;
  transition: transform 0.3s, box-shadow 0.3s;
}

.download-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-purple);
}

.download-icon {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  background: rgba(255,255,255,0.12);
}

.download-icon svg {
  width: 24px;
  height: 24px;
}

.download-info {
  display: flex;
  flex-direction: column;
  text-align: left;
}

.download-label {
  font-size: 1.1rem;
  font-weight: 700;
}

.download-store {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.7);
}

/* About */
.about {
  padding: 140px 0;
  background: linear-gradient(135deg, var(--purple-700), var(--pink-700));
  color: #fff;
  position: relative;
  overflow: hidden;
}

.about::before {
  content: "";
  position: absolute;
  top: -10%;
  right: -5%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.about-inner {
  display: grid;
  grid-template-columns: 1fr 0.9fr;
  gap: 80px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.about-copy h2 {
  font-size: 2.4rem;
  margin-bottom: 24px;
  letter-spacing: -0.02em;
  line-height: 1.25;
}

.about-copy p {
  font-size: 1.15rem;
  line-height: 1.9;
  opacity: 0.92;
}

.about-logo {
  display: flex;
  justify-content: center;
}

.about-logo img {
  width: 220px;
  border-radius: 40px;
  box-shadow: 0 28px 70px rgba(0,0,0,0.25);
}

/* Footer */
.site-footer {
  padding: 48px 0;
  background: var(--gray-900);
  color: rgba(255,255,255,0.65);
  font-size: 0.9rem;
}

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

.footer-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  color: #fff;
  font-size: 1.15rem;
}

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

.footer-links {
  display: flex;
  gap: 32px;
}

.footer-links a {
  color: rgba(255,255,255,0.65);
  transition: color 0.2s;
}

.footer-links a:hover {
  color: #fff;
}

.footer-beian {
  margin-top: 28px;
  padding-top: 24px;
  border-top: 1px solid rgba(255,255,255,0.12);
  text-align: center;
}

.footer-beian a {
  color: rgba(255,255,255,0.5);
  font-size: 0.85rem;
  transition: color 0.2s;
}

.footer-beian a:hover {
  color: #fff;
}

/* Responsive */
@media (max-width: 1024px) {
  .hero-inner,
  .showcase-inner,
  .about-inner {
    grid-template-columns: 1fr;
  }

  .hero {
    padding: 120px 0 100px;
  }

  .hero-copy h1 {
    font-size: 2.8rem;
  }

  .hero-visual {
    order: -1;
  }

  .phone-frame {
    width: 280px;
  }

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

  .showcase-screens {
    order: 1;
  }
}

@media (max-width: 640px) {
  .container {
    padding: 0 20px;
  }

  .main-nav {
    position: fixed;
    top: 80px;
    left: 0;
    right: 0;
    background: rgba(255,255,255,0.96);
    backdrop-filter: blur(12px);
    flex-direction: column;
    padding: 24px 32px;
    gap: 20px;
    border-bottom: 1px solid var(--gray-100);
    transform: translateY(-150%);
    transition: transform 0.3s;
  }

  .main-nav.open {
    transform: translateY(0);
  }

  .nav-toggle {
    display: flex;
  }

  .hero {
    padding: 100px 0 80px;
  }

  .hero-copy h1 {
    font-size: 2.2rem;
  }

  .hero-lead {
    font-size: 1.1rem;
  }

  .hero-actions {
    flex-direction: column;
  }

  .hero-stats {
    gap: 28px;
    justify-content: space-between;
  }

  .features,
  .showcase,
  .download,
  .about {
    padding: 80px 0;
  }

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

  .section-title,
  .showcase-copy h2,
  .about-copy h2 {
    font-size: 1.7rem;
  }

  .phone-frame.small {
    width: 150px;
  }

  .download-card {
    width: 100%;
    max-width: 340px;
  }

  .about-logo img {
    width: 160px;
  }

  .footer-inner {
    flex-direction: column;
    text-align: center;
  }
}