/* 全局重置与变量 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary: #e94560;
  --primary-dark: #c73e54;
  --secondary: #16213e;
  --accent: #0f3460;
  --bg: #1a1a2e;
  --text: #eaeaea;
  --text-light: #a0a0b0;
  --glass: rgba(255, 255, 255, 0.05);
  --glass-border: rgba(255, 255, 255, 0.1);
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
  --radius: 16px;
  --transition: 0.3s ease;
}

[data-theme="light"] {
  --bg: #f5f5f7;
  --secondary: #ffffff;
  --accent: #e8e8ed;
  --text: #1d1d1f;
  --text-light: #6e6e73;
  --glass: rgba(0, 0, 0, 0.03);
  --glass-border: rgba(0, 0, 0, 0.08);
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  transition: background var(--transition), color var(--transition);
  overflow-x: hidden;
}

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

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

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

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 80px 0;
}

.section-title {
  font-size: 2.2rem;
  font-weight: 800;
  margin-bottom: 16px;
  text-align: center;
  background: linear-gradient(135deg, var(--primary), #ff6b6b);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-subtitle {
  text-align: center;
  color: var(--text-light);
  font-size: 1.1rem;
  margin-bottom: 48px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.glass-card {
  background: var(--glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: var(--shadow);
  transition: transform 0.4s ease, box-shadow 0.4s ease;
}

.glass-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 32px;
  border-radius: 50px;
  font-weight: 600;
  font-size: 1rem;
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), #ff6b6b);
  color: #fff;
  box-shadow: 0 4px 20px rgba(233, 69, 96, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(233, 69, 96, 0.6);
  color: #fff;
}

.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
}

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

/* Header */
header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--glass-border);
  transition: background var(--transition), border var(--transition);
}

header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text);
  text-decoration: none;
}

.logo svg {
  width: 40px;
  height: 40px;
}

.logo span {
  background: linear-gradient(135deg, var(--primary), #ff6b6b);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

nav a {
  padding: 8px 16px;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text);
  transition: all var(--transition);
  position: relative;
}

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

.mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  background: none;
  border: none;
}

.mobile-toggle span {
  width: 28px;
  height: 2.5px;
  background: var(--text);
  border-radius: 4px;
  transition: all 0.3s ease;
}

/* Hero */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 70px;
  position: relative;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: -1;
}

.hero-bg svg {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 700px;
}

.hero h1 {
  font-size: 3.5rem;
  font-weight: 900;
  line-height: 1.2;
  margin-bottom: 24px;
}

.hero h1 span {
  background: linear-gradient(135deg, var(--primary), #ff6b6b);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 1.2rem;
  color: var(--text-light);
  margin-bottom: 40px;
  max-width: 500px;
}

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

/* Banner Carousel */
.banner-carousel {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius);
  margin-top: 60px;
  background: var(--glass);
  border: 1px solid var(--glass-border);
}

.banner-slide {
  display: none;
  padding: 60px 40px;
  text-align: center;
  animation: fadeIn 0.6s ease;
}

.banner-slide.active {
  display: block;
}

.banner-slide h3 {
  font-size: 1.8rem;
  margin-bottom: 12px;
}

.banner-slide p {
  color: var(--text-light);
  max-width: 500px;
  margin: 0 auto 24px;
}

.banner-dots {
  display: flex;
  justify-content: center;
  gap: 10px;
  padding: 16px 0;
}

.banner-dots span {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--text-light);
  cursor: pointer;
  transition: all 0.3s ease;
}

.banner-dots span.active {
  background: var(--primary);
  transform: scale(1.2);
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Grids */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

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

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

/* Brand */
.brand-story {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.brand-text h2 {
  font-size: 2rem;
  margin-bottom: 20px;
}

.brand-text p {
  color: var(--text-light);
  margin-bottom: 16px;
}

.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-top: 48px;
}

.stat-card {
  text-align: center;
  padding: 24px;
  background: var(--glass);
  border-radius: var(--radius);
  border: 1px solid var(--glass-border);
}

.stat-number {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--primary);
}

.stat-label {
  color: var(--text-light);
  font-size: 0.9rem;
  margin-top: 4px;
}

/* Products */
.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.product-card {
  background: var(--glass);
  border-radius: var(--radius);
  border: 1px solid var(--glass-border);
  padding: 32px;
  text-align: center;
  transition: all 0.4s ease;
}

.product-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.3);
}

.product-card svg {
  width: 64px;
  height: 64px;
  margin: 0 auto 16px;
}

.product-card h4 {
  font-size: 1.3rem;
  margin-bottom: 8px;
}

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

/* Advantages */
.advantages {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 24px;
}

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

.advantage-item svg {
  width: 48px;
  height: 48px;
  margin: 0 auto 12px;
}

/* Cases */
.cases-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.case-card {
  background: var(--glass);
  border-radius: var(--radius);
  border: 1px solid var(--glass-border);
  padding: 24px;
  transition: all 0.4s ease;
}

.case-card:hover {
  transform: translateY(-4px);
}

.case-card h4 {
  font-size: 1.1rem;
  margin-bottom: 8px;
}

.case-card p {
  color: var(--text-light);
  font-size: 0.9rem;
}

/* Testimonials */
.testimonials {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.testimonial-card {
  background: var(--glass);
  border-radius: var(--radius);
  border: 1px solid var(--glass-border);
  padding: 32px;
  position: relative;
}

.testimonial-card::before {
  content: '"';
  font-size: 4rem;
  color: var(--primary);
  opacity: 0.3;
  position: absolute;
  top: 8px;
  left: 16px;
  font-family: Georgia, serif;
}

.testimonial-card p {
  color: var(--text-light);
  font-style: italic;
  margin-bottom: 16px;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 12px;
}

.testimonial-author svg {
  width: 40px;
  height: 40px;
  border-radius: 50%;
}

/* Partners */
.partners {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 32px;
  padding: 24px 0;
}

.partner-item {
  opacity: 0.6;
  transition: opacity 0.3s ease;
}

.partner-item:hover {
  opacity: 1;
}

.partner-item svg {
  height: 40px;
  width: auto;
}

/* News */
.news-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.news-card {
  background: var(--glass);
  border-radius: var(--radius);
  border: 1px solid var(--glass-border);
  padding: 24px;
  transition: all 0.4s ease;
}

.news-card:hover {
  transform: translateY(-4px);
}

.news-date {
  color: var(--text-light);
  font-size: 0.85rem;
  margin-bottom: 8px;
}

.news-card h4 {
  font-size: 1.1rem;
  margin-bottom: 8px;
}

.news-card p {
  color: var(--text-light);
  font-size: 0.9rem;
  margin-bottom: 16px;
}

/* FAQ */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  border-bottom: 1px solid var(--glass-border);
  padding: 16px 0;
}

.faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  font-weight: 600;
  font-size: 1.05rem;
  padding: 8px 0;
  transition: color 0.3s ease;
}

.faq-question:hover {
  color: var(--primary);
}

.faq-question .icon {
  font-size: 1.2rem;
  transition: transform 0.3s ease;
}

.faq-item.active .faq-question .icon {
  transform: rotate(45deg);
}

.faq-answer {
  padding: 8px 0 16px;
  color: var(--text-light);
  line-height: 1.7;
  display: none;
}

.faq-item.active .faq-answer {
  display: block;
}

/* HowTo */
.howto-steps {
  max-width: 700px;
  margin: 0 auto;
}

.howto-step {
  display: flex;
  gap: 20px;
  margin-bottom: 24px;
  align-items: flex-start;
}

.step-number {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), #ff6b6b);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  color: #fff;
  flex-shrink: 0;
}

.step-content h4 {
  font-size: 1.1rem;
  margin-bottom: 4px;
}

.step-content p {
  color: var(--text-light);
}

/* Contact */
.contact-info {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 24px;
}

.contact-item {
  text-align: center;
  padding: 24px;
  background: var(--glass);
  border-radius: var(--radius);
  border: 1px solid var(--glass-border);
}

.contact-item svg {
  width: 40px;
  height: 40px;
  margin: 0 auto 12px;
}

.contact-item h4 {
  font-size: 1rem;
  margin-bottom: 4px;
}

.contact-item p {
  color: var(--text-light);
  font-size: 0.9rem;
}

/* Footer */
footer {
  background: var(--secondary);
  border-top: 1px solid var(--glass-border);
  padding: 48px 0 24px;
  margin-top: 80px;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 32px;
  margin-bottom: 32px;
}

.footer-col h4 {
  font-size: 1rem;
  margin-bottom: 16px;
  color: var(--text);
}

.footer-col a {
  display: block;
  padding: 4px 0;
  color: var(--text-light);
  font-size: 0.9rem;
  transition: color 0.3s ease;
}

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

.footer-bottom {
  text-align: center;
  padding-top: 24px;
  border-top: 1px solid var(--glass-border);
  color: var(--text-light);
  font-size: 0.85rem;
}

.footer-bottom p {
  margin: 4px 0;
}

/* Back to top */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), #ff6b6b);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  border: none;
  box-shadow: 0 4px 20px rgba(233, 69, 96, 0.4);
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
  z-index: 999;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  transform: translateY(-4px);
}

/* Dark mode toggle */
.dark-mode-toggle {
  position: fixed;
  bottom: 32px;
  left: 32px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--glass);
  backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 999;
  transition: all 0.3s ease;
  color: var(--text);
}

.dark-mode-toggle:hover {
  transform: scale(1.1);
}

/* Breadcrumb */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 16px 0;
  font-size: 0.9rem;
  color: var(--text-light);
}

.breadcrumb a {
  color: var(--text-light);
}

.breadcrumb a:hover {
  color: var(--primary);
}

.breadcrumb span {
  color: var(--text-light);
}

/* EEAT Section */
.eeat-section {
  background: var(--glass);
  border-radius: var(--radius);
  border: 1px solid var(--glass-border);
  padding: 32px;
  margin-top: 48px;
}

.eeat-section h3 {
  font-size: 1.3rem;
  margin-bottom: 16px;
}

.eeat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
}

.eeat-item {
  font-size: 0.9rem;
  color: var(--text-light);
}

.eeat-item strong {
  color: var(--text);
  display: block;
  margin-bottom: 4px;
}

/* Mobile Menu */
.mobile-menu {
  position: fixed;
  top: 70px;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--bg);
  z-index: 999;
  padding: 24px;
  display: none;
  overflow-y: auto;
  border-top: 1px solid var(--glass-border);
}

.mobile-menu.open {
  display: block;
}

.mobile-menu a {
  display: block;
  padding: 12px 0;
  font-size: 1.1rem;
  border-bottom: 1px solid var(--glass-border);
  color: var(--text);
}

.mobile-menu a:last-child {
  border-bottom: none;
}

/* Responsive */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 2.2rem;
  }
  .section-title {
    font-size: 1.8rem;
  }
  .grid-2,
  .brand-story {
    grid-template-columns: 1fr;
  }
  .grid-3 {
    grid-template-columns: 1fr 1fr;
  }
  .grid-4 {
    grid-template-columns: 1fr 1fr;
  }
  .stats {
    grid-template-columns: 1fr 1fr;
  }
  nav a {
    display: none;
  }
  .mobile-toggle {
    display: flex;
  }
  .banner-slide {
    padding: 32px 20px;
  }
  .section {
    padding: 48px 0;
  }
  .container {
    padding: 0 16px;
  }
  .stat-number {
    font-size: 2rem;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 480px) {
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
  .stats {
    grid-template-columns: 1fr;
  }
  .hero h1 {
    font-size: 1.8rem;
  }
  .hero p {
    font-size: 1rem;
  }
}