/* ============================================
   Modern Home - Design System
   与支付页 modern.css 保持一致的视觉风格
   ============================================ */

/* === CSS Variables === */
:root {
  --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --primary-color: #667eea;
  --primary-dark: #764ba2;
  --success-color: #00b894;
  --bg-light: #f8fafc;
  --card-bg: #ffffff;
  --card-radius: 16px;
  --card-shadow: 0 4px 24px rgba(0,0,0,0.06);
  --font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'PingFang SC', 'Helvetica Neue', sans-serif;
  --text-primary: #1a1a2e;
  --text-secondary: #6b7280;
  --text-muted: #9ca3af;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  color: var(--text-primary);
  line-height: 1.6;
  background: #fff;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a {
  text-decoration: none;
  color: inherit;
  transition: all 0.3s ease;
}

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

/* === Navbar === */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  padding: 1rem 0;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.navbar.scrolled {
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 1px 20px rgba(0, 0, 0, 0.06);
  padding: 0.6rem 0;
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-size: 1.5rem;
  font-weight: 700;
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.navbar.scrolled .nav-logo {
  -webkit-text-fill-color: transparent;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-menu a {
  font-size: 0.95rem;
  color: rgba(255, 255, 255, 0.9);
  font-weight: 500;
  position: relative;
  padding: 0.4rem 0;
}

.nav-menu a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary-gradient);
  transition: width 0.3s ease;
  border-radius: 2px;
}

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

.navbar.scrolled .nav-menu a {
  color: var(--text-primary);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.btn-outline {
  padding: 0.5rem 1.2rem;
  border: 1.5px solid rgba(255, 255, 255, 0.7);
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 500;
  color: #fff;
  transition: all 0.3s ease;
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: #fff;
}

.navbar.scrolled .btn-outline {
  border-color: var(--primary-color);
  color: var(--primary-color);
}

.navbar.scrolled .btn-outline:hover {
  background: rgba(102, 126, 234, 0.08);
}

.btn-primary {
  padding: 0.55rem 1.4rem;
  background: var(--primary-gradient);
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 500;
  color: #fff;
  box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
  transition: all 0.3s ease;
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: #fff;
  cursor: pointer;
  padding: 0.5rem;
}

.navbar.scrolled .nav-toggle {
  color: var(--text-primary);
}

/* === Hero Section === */
.hero {
  min-height: 100vh;
  background: var(--primary-gradient);
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding: 6rem 2rem 4rem;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 80%;
  height: 200%;
  background: radial-gradient(ellipse, rgba(255,255,255,0.08) 0%, transparent 70%);
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -10%;
  left: -10%;
  width: 50%;
  height: 60%;
  background: radial-gradient(ellipse, rgba(255,255,255,0.05) 0%, transparent 70%);
  pointer-events: none;
}

.hero-container {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-content h1 {
  font-size: 3rem;
  font-weight: 800;
  color: #fff;
  line-height: 1.2;
  margin-bottom: 1.5rem;
  letter-spacing: -0.02em;
}

.hero-content p {
  font-size: 1.2rem;
  color: rgba(255, 255, 255, 0.85);
  line-height: 1.8;
  margin-bottom: 2.5rem;
  max-width: 480px;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.btn-hero {
  padding: 0.9rem 2.2rem;
  border-radius: 10px;
  font-size: 1rem;
  font-weight: 600;
  transition: all 0.3s ease;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.btn-hero-primary {
  background: #fff;
  color: var(--primary-color);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

.btn-hero-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
}

.btn-hero-outline {
  background: transparent;
  color: #fff;
  border: 2px solid rgba(255, 255, 255, 0.5);
}

.btn-hero-outline:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: #fff;
}

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

.hero-card {
  background: rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(20px);
  border-radius: 24px;
  padding: 3rem;
  border: 1px solid rgba(255, 255, 255, 0.2);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
  width: 100%;
  max-width: 380px;
}

.hero-card-icon {
  width: 60px;
  height: 60px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  margin-bottom: 1.5rem;
}

.hero-card h3 {
  color: #fff;
  font-size: 1.3rem;
  margin-bottom: 1rem;
}

.hero-card p {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.95rem;
  line-height: 1.7;
}

.hero-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 1.5rem;
}

.hero-stat {
  text-align: center;
  padding: 1rem;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 12px;
}

.hero-stat strong {
  display: block;
  font-size: 1.5rem;
  color: #fff;
  font-weight: 700;
}

.hero-stat span {
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.6);
}

/* === Section Common === */
.section {
  padding: 6rem 2rem;
}

.section-container {
  max-width: 1200px;
  margin: 0 auto;
}

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

.section-header h2 {
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 1rem;
}

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

/* === Features Section === */
.features {
  background: #fff;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
}

.feature-card {
  background: var(--card-bg);
  border-radius: var(--card-radius);
  padding: 2.5rem 2rem;
  text-align: center;
  box-shadow: var(--card-shadow);
  border: 1px solid rgba(0, 0, 0, 0.04);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.1);
}

.feature-icon {
  width: 70px;
  height: 70px;
  border-radius: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.5rem;
  font-size: 2rem;
}

.feature-icon.icon-purple {
  background: rgba(102, 126, 234, 0.1);
  color: var(--primary-color);
}

.feature-icon.icon-green {
  background: rgba(0, 184, 148, 0.1);
  color: var(--success-color);
}

.feature-icon.icon-orange {
  background: rgba(255, 159, 67, 0.1);
  color: #ff9f43;
}

.feature-icon.icon-blue {
  background: rgba(54, 153, 255, 0.1);
  color: #3699ff;
}

.feature-card h3 {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.8rem;
}

.feature-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* === Advantages Section === */
.advantages {
  background: var(--bg-light);
}

.advantages-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
}

.advantage-item {
  text-align: center;
  padding: 2.5rem 1.5rem;
  background: var(--card-bg);
  border-radius: var(--card-radius);
  box-shadow: var(--card-shadow);
  transition: all 0.3s ease;
}

.advantage-item:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
}

.advantage-number {
  font-size: 2.8rem;
  font-weight: 800;
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.5rem;
  line-height: 1.2;
}

.advantage-item h4 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.advantage-item p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* === CTA Section === */
.cta-section {
  background: var(--primary-gradient);
  padding: 5rem 2rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -20%;
  width: 60%;
  height: 200%;
  background: radial-gradient(ellipse, rgba(255,255,255,0.06) 0%, transparent 70%);
  pointer-events: none;
}

.cta-content {
  position: relative;
  z-index: 1;
}

.cta-content h2 {
  font-size: 2.2rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 1rem;
}

.cta-content p {
  font-size: 1.1rem;
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 2rem;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

.btn-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 1rem 2.5rem;
  background: #fff;
  color: var(--primary-color);
  border-radius: 10px;
  font-size: 1.05rem;
  font-weight: 600;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
  transition: all 0.3s ease;
}

.btn-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
}

/* === Footer === */
.footer {
  background: #1a1a2e;
  color: rgba(255, 255, 255, 0.8);
  padding: 4rem 2rem 2rem;
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-brand p {
  font-size: 0.9rem;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.5);
  margin-top: 1rem;
  max-width: 280px;
}

.footer-brand .brand-name {
  font-size: 1.4rem;
  font-weight: 700;
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.footer-links h4 {
  font-size: 1rem;
  font-weight: 600;
  color: #fff;
  margin-bottom: 1.5rem;
}

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

.footer-links ul li {
  margin-bottom: 0.8rem;
}

.footer-links ul li a {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.5);
  transition: all 0.3s ease;
}

.footer-links ul li a:hover {
  color: #fff;
  padding-left: 4px;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 2rem;
  text-align: center;
}

.footer-bottom p {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.4);
}

/* === Responsive === */
@media (max-width: 1024px) {
  .hero-content h1 {
    font-size: 2.5rem;
  }

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

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }
}

@media (max-width: 768px) {
  .nav-menu,
  .nav-actions {
    display: none;
  }

  .nav-menu.active {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background: #fff;
    padding: 1.5rem 2rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    border-radius: 0 0 16px 16px;
    gap: 0.5rem;
  }

  .nav-menu.active a {
    color: var(--text-primary) !important;
    padding: 0.8rem 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
  }

  .nav-actions.active {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: calc(100% + 200px);
    left: 0;
    width: 100%;
    background: #fff;
    padding: 0 2rem 1.5rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    border-radius: 0 0 16px 16px;
  }

  .nav-toggle {
    display: block;
  }

  .hero {
    padding: 8rem 1.5rem 4rem;
  }

  .hero-container {
    grid-template-columns: 1fr;
    gap: 3rem;
    text-align: center;
  }

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

  .hero-content p {
    margin-left: auto;
    margin-right: auto;
  }

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

  .hero-visual {
    order: -1;
  }

  .hero-card {
    max-width: 320px;
    margin: 0 auto;
    padding: 2rem;
  }

  .section {
    padding: 4rem 1.5rem;
  }

  .section-header h2 {
    font-size: 1.8rem;
  }

  .features-grid,
  .advantages-grid {
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

@media (max-width: 480px) {
  .hero-content h1 {
    font-size: 1.8rem;
  }

  .hero-content p {
    font-size: 1rem;
  }

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

  .feature-card {
    padding: 2rem 1.5rem;
  }

  .btn-hero {
    width: 100%;
    justify-content: center;
  }

  .hero-actions {
    flex-direction: column;
    width: 100%;
  }
}