/* Apple-inspired design system */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --bg: #fbfbfd;
  --bg-alt: #f5f5f7;
  --surface: #ffffff;
  --text: #1d1d1f;
  --text-secondary: #6e6e73;
  --text-tertiary: #86868b;
  --accent: #48b884;
  --accent-dark: #3a9a6e;
  --accent-light: #e8f7f1;
  --border: rgba(0, 0, 0, 0.08);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.12);
  --nav-height: 52px;
  --max-width: 980px;
  --wide-width: 1200px;
  --radius: 18px;
  --transition: 0.35s cubic-bezier(0.25, 0.1, 0.25, 1);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.47059;
  letter-spacing: -0.022em;
  overflow-x: hidden;
}

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

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

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

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 22px;
}

.container-wide {
  max-width: var(--wide-width);
  margin: 0 auto;
  padding: 0 22px;
}

/* Navigation */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  z-index: 1000;
  background: rgba(251, 251, 253, 0.72);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--border);
  transition: background var(--transition);
}

.nav-inner {
  max-width: var(--wide-width);
  margin: 0 auto;
  padding: 0 22px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 17px;
  font-weight: 600;
  color: var(--text);
  letter-spacing: -0.02em;
}

.nav-brand img.company-logo {
  height: 36px;
  width: auto;
  border-radius: 0;
}

.nav-brand img.app-logo-nav {
  height: 32px;
  width: auto;
  border-radius: 8px;
}

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

.nav-links a {
  font-size: 14px;
  color: var(--text-secondary);
  font-weight: 400;
  letter-spacing: -0.01em;
}

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

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 1px;
  background: var(--text);
  margin: 5px 0;
  transition: var(--transition);
}

/* Hero */
.hero {
  padding: calc(var(--nav-height) + 80px) 22px 100px;
  text-align: center;
  background: var(--bg);
}

.hero-eyebrow {
  font-size: 17px;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 12px;
  letter-spacing: 0.02em;
}

.hero-title {
  font-size: clamp(40px, 7vw, 64px);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.05;
  margin-bottom: 16px;
  background: linear-gradient(135deg, var(--text) 0%, #4a4a4f 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: clamp(19px, 3vw, 24px);
  color: var(--text-secondary);
  font-weight: 400;
  max-width: 640px;
  margin: 0 auto 36px;
  line-height: 1.4;
  letter-spacing: -0.01em;
}

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

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 980px;
  font-size: 17px;
  font-weight: 400;
  letter-spacing: -0.01em;
  transition: all var(--transition);
  cursor: pointer;
  border: none;
  text-decoration: none;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}

.btn-primary:hover {
  background: var(--accent-dark);
  color: #fff;
  transform: scale(1.02);
}

.btn-secondary {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--accent);
}

.btn-secondary:hover {
  background: var(--accent-light);
  color: var(--accent-dark);
}

.btn-ghost {
  background: var(--text);
  color: #fff;
}

.btn-ghost:hover {
  background: #333;
  color: #fff;
}

/* Sections */
.section {
  padding: 100px 0;
}

.section-alt {
  background: var(--bg-alt);
}

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

.section-eyebrow {
  font-size: 14px;
  font-weight: 600;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 12px;
}

.section-title {
  font-size: clamp(32px, 5vw, 48px);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.08;
  margin-bottom: 16px;
}

.section-desc {
  font-size: 19px;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.5;
}

/* Feature grid */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 40px 32px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.feature-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 20px;
  background: var(--accent-light);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.feature-icon .gugu-icon {
  font-size: 26px;
  color: var(--accent);
}

.feature-card h3 {
  font-size: 21px;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 10px;
}

.feature-card p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* About content */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.about-text h3 {
  font-size: 28px;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}

.about-text p {
  font-size: 17px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 16px;
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.stat-item {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 28px 24px;
  text-align: center;
  box-shadow: var(--shadow-sm);
}

.stat-number {
  font-size: 36px;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: -0.03em;
  line-height: 1;
  margin-bottom: 8px;
}

.stat-label {
  font-size: 14px;
  color: var(--text-secondary);
}

/* Values */
.values-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
}

.value-item {
  text-align: center;
  padding: 32px 24px;
}

.value-item h4 {
  font-size: 19px;
  font-weight: 600;
  margin: 16px 0 8px;
  letter-spacing: -0.02em;
}

.value-item p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.5;
}

.value-dot {
  width: 12px;
  height: 12px;
  background: var(--accent);
  border-radius: 50%;
  margin: 0 auto;
}

/* App showcase */
.app-showcase {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

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

.app-logo {
  width: 200px;
  height: auto;
  border-radius: 24px;
  box-shadow: var(--shadow-lg);
}

.app-info h3 {
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 16px;
}

.app-info p {
  font-size: 17px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 24px;
}

.app-links {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* Contact */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  max-width: 720px;
  margin: 0 auto;
}

.contact-card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition);
}

.contact-card:hover {
  box-shadow: var(--shadow-md);
}

.contact-card h4 {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 8px;
}

.contact-card p,
.contact-card a {
  font-size: 17px;
  color: var(--text);
  line-height: 1.5;
}

/* App page hero */
.app-hero {
  padding: calc(var(--nav-height) + 60px) 22px 80px;
  text-align: center;
  background: linear-gradient(180deg, var(--bg-alt) 0%, var(--bg) 100%);
}

.app-hero-logo {
  width: 160px;
  height: auto;
  border-radius: 24px;
  margin: 0 auto 24px;
  box-shadow: var(--shadow-lg);
}

.app-hero h1 {
  font-size: clamp(36px, 6vw, 56px);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 12px;
}

.app-hero .tagline {
  font-size: 21px;
  color: var(--text-secondary);
  margin-bottom: 32px;
}

/* Feature showcase (app page) */
.showcase-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
  padding: 80px 0;
}

.showcase-block.reverse {
  direction: rtl;
}

.showcase-block.reverse > * {
  direction: ltr;
}

.showcase-visual {
  position: relative;
  border-radius: var(--radius);
  aspect-ratio: 4/3;
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.showcase-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

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

.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.18;
}

.hero.has-bg-image {
  position: relative;
  overflow: hidden;
}

.hero.has-bg-image .hero-content-wrap {
  position: relative;
  z-index: 1;
}

.legal-text-links {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 40px;
  font-size: 14px;
  color: var(--text-tertiary);
}

.legal-text-links a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition);
}

.legal-text-links a:hover {
  color: var(--accent);
}

.legal-text-links .sep {
  color: var(--border);
  user-select: none;
}

.showcase-content h2 {
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 16px;
}

.showcase-content p {
  font-size: 17px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 12px;
}

.showcase-list {
  list-style: none;
  margin-top: 20px;
}

.showcase-list li {
  font-size: 15px;
  color: var(--text-secondary);
  padding: 8px 0 8px 24px;
  position: relative;
}

.showcase-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 8px;
  height: 8px;
  background: var(--accent);
  border-radius: 50%;
}

/* Legal pages */
.legal-page {
  padding: calc(var(--nav-height) + 60px) 22px 80px;
  max-width: 720px;
  margin: 0 auto;
}

.legal-page h1 {
  font-size: 40px;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 8px;
}

.legal-meta {
  font-size: 14px;
  color: var(--text-tertiary);
  margin-bottom: 48px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border);
}

.legal-page h2 {
  font-size: 24px;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin: 40px 0 16px;
}

.legal-page h3 {
  font-size: 19px;
  font-weight: 600;
  margin: 28px 0 12px;
}

.legal-page p,
.legal-page li {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 12px;
}

.legal-page ul,
.legal-page ol {
  padding-left: 24px;
  margin-bottom: 16px;
}

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

.legal-nav {
  display: flex;
  gap: 24px;
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

.legal-nav a {
  font-size: 15px;
}

/* Footer */
.footer {
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  padding: 48px 22px 24px;
}

.footer-inner {
  max-width: var(--wide-width);
  margin: 0 auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 40px;
}

.footer-brand p {
  font-size: 14px;
  color: var(--text-secondary);
  margin-top: 12px;
  line-height: 1.6;
  max-width: 320px;
}

.footer-col h4 {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 16px;
}

.footer-col ul {
  list-style: none;
}

.footer-col li {
  margin-bottom: 10px;
}

.footer-col a {
  font-size: 14px;
  color: var(--text-secondary);
}

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

.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-bottom p {
  font-size: 12px;
  color: var(--text-tertiary);
}

/* Animations */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Responsive */
@media (max-width: 834px) {
  .feature-grid,
  .values-row {
    grid-template-columns: 1fr;
  }

  .about-grid,
  .app-showcase,
  .showcase-block {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .showcase-block.reverse {
    direction: ltr;
  }

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

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

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

@media (max-width: 734px) {
  .nav-toggle {
    display: block;
  }

  .nav-links {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: rgba(251, 251, 253, 0.96);
    backdrop-filter: saturate(180%) blur(20px);
    flex-direction: column;
    padding: 24px;
    gap: 0;
    border-bottom: 1px solid var(--border);
    transform: translateY(-120%);
    opacity: 0;
    transition: all var(--transition);
    pointer-events: none;
  }

  .nav-links.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .nav-links li {
    width: 100%;
    padding: 14px 0;
    border-bottom: 1px solid var(--border);
  }

  .nav-links li:last-child {
    border-bottom: none;
  }

  .section {
    padding: 64px 0;
  }

  .hero {
    padding-top: calc(var(--nav-height) + 48px);
    padding-bottom: 64px;
  }
}