@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@300;400;500;700;900&display=swap');

:root {
  /* 浅色系 - 苹果官网风格 */
  --color-bg-primary: #ffffff;
  --color-bg-secondary: #f5f5f7;
  --color-bg-dark: #1d1d1f;
  --color-bg-card: #ffffff;
  --color-text-primary: #1d1d1f;
  --color-text-secondary: #86868b;
  --color-text-inverse: #f5f5f7;
  --color-accent: #000000;
  --color-accent-hover: #333333;
  --color-border: #d2d2d7;
  --color-border-light: #e5e5e5;
  --color-glow: rgba(0, 0, 0, 0.05);
  
  --font-size-hero: clamp(48px, 10vw, 80px);
  --font-size-h1: clamp(36px, 6vw, 56px);
  --font-size-h2: clamp(28px, 4vw, 40px);
  --font-size-h3: clamp(22px, 3vw, 28px);
  --font-size-body: 17px;
  --font-size-small: 14px;
  --font-size-caption: 12px;
  
  --spacing-xs: 8px;
  --spacing-sm: 16px;
  --spacing-md: 40px;
  --spacing-lg: 80px;
  --spacing-xl: 120px;
  
  --max-width: 1280px;
  --transition-smooth: cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'SF Pro Text', 'Segoe UI', sans-serif;
  font-size: var(--font-size-body);
  color: var(--color-text-primary);
  background: var(--color-bg-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'SF Pro Display', sans-serif;
  font-weight: 600;
  letter-spacing: -0.5px;
}

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

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

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

@media (min-width: 1024px) {
  .container {
    padding: 0 48px;
  }
}

/* Navigation */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border-light);
  transition: all 0.3s var(--transition-smooth);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
}

.nav-logo {
  font-size: 20px;
  font-weight: 600;
  letter-spacing: -0.5px;
  color: var(--color-text-primary);
}

.nav-links {
  display: none;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  font-size: var(--font-size-small);
  color: var(--color-text-primary);
  position: relative;
  transition: opacity 0.3s;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--color-text-primary);
  transition: width 0.3s var(--transition-smooth);
}

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

.nav-toggle {
  display: flex;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--color-text-primary);
  transition: all 0.3s var(--transition-smooth);
}

@media (min-width: 768px) {
  .nav-links {
    display: flex;
  }
  .nav-toggle {
    display: none;
  }
}

/* Mobile Menu */
.mobile-menu {
  position: fixed;
  top: 56px;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--color-bg-primary);
  padding: 40px 20px;
  transform: translateX(100%);
  transition: transform 0.4s var(--transition-smooth);
  z-index: 999;
}

.mobile-menu.active {
  transform: translateX(0);
}

.mobile-menu ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.mobile-menu a {
  font-size: 24px;
  font-weight: 500;
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #000;
  position: relative;
  overflow: hidden;
  padding-top: 56px;
}

.hero-glow {
  position: absolute;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255,255,255,0.15) 0%, transparent 70%);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  animation: glowPulse 8s ease-in-out infinite;
}

@keyframes glowPulse {
  0%, 100% {
    transform: translate(-50%, -50%) scale(1);
    opacity: 0.5;
  }
  50% {
    transform: translate(-50%, -50%) scale(1.2);
    opacity: 0.8;
  }
}

.hero-content {
  text-align: center;
  color: var(--color-text-inverse);
  position: relative;
  z-index: 10;
}

.hero-logo {
  font-size: 18px;
  font-weight: 500;
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 24px;
  opacity: 0;
  animation: fadeInUp 0.8s var(--transition-smooth) 0.2s forwards;
}

.hero-title {
  font-size: var(--font-size-hero);
  font-weight: 700;
  letter-spacing: -2px;
  line-height: 1.1;
  margin-bottom: 16px;
  opacity: 0;
  animation: fadeInUp 0.8s var(--transition-smooth) 0.4s forwards;
}

.hero-subtitle {
  font-size: clamp(18px, 3vw, 24px);
  color: var(--color-text-secondary);
  font-weight: 400;
  margin-bottom: 40px;
  opacity: 0;
  animation: fadeInUp 0.8s var(--transition-smooth) 0.6s forwards;
}

.hero-cta {
  display: inline-block;
  padding: 16px 32px;
  background: var(--color-text-inverse);
  color: var(--color-accent);
  font-size: var(--font-size-body);
  font-weight: 500;
  border-radius: 980px;
  transition: all 0.3s var(--transition-smooth);
  opacity: 0;
  animation: fadeInUp 0.8s var(--transition-smooth) 0.8s forwards;
}

.hero-cta:hover {
  transform: scale(1.02);
  box-shadow: 0 10px 30px rgba(255, 255, 255, 0.2);
}

/* Hero Banner */
.hero-banner {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

.hero-banner img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(40px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Section Common */
.section {
  padding: var(--spacing-xl) 0;
}

.section-dark {
  background: var(--color-bg-dark);
  color: var(--color-text-inverse);
}

.section-gray {
  background: var(--color-bg-secondary);
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-lg);
}

.section-title {
  font-size: var(--font-size-h2);
  font-weight: 700;
  letter-spacing: -1px;
  margin-bottom: 12px;
}

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

/* About Section */
.about-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-lg);
  align-items: center;
}

@media (min-width: 768px) {
  .about-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.about-content h2 {
  font-size: var(--font-size-h2);
  font-weight: 700;
  margin-bottom: 16px;
}

.about-content p {
  color: var(--color-text-secondary);
  line-height: 1.8;
}

.about-image {
  aspect-ratio: 4/3;
  background: var(--color-bg-secondary);
  border-radius: 12px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-secondary);
}

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

@media (min-width: 640px) {
  .products-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .products-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.product-card {
  background: var(--color-bg-primary);
  border-radius: 12px;
  overflow: hidden;
  transition: all 0.3s var(--transition-smooth);
  cursor: pointer;
}

.product-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.product-image {
  aspect-ratio: 4/3;
  background: var(--color-bg-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.product-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s var(--transition-smooth);
}

.product-card:hover .product-image img {
  transform: scale(1.05);
}

.product-info {
  padding: 20px;
}

.product-name {
  font-size: var(--font-size-body);
  font-weight: 600;
  margin-bottom: 4px;
}

.product-price {
  font-size: var(--font-size-small);
  color: var(--color-text-secondary);
}

/* Features Section */
.features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-md);
  max-width: 900px;
  margin: 0 auto;
}

@media (min-width: 768px) {
  .features-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

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

.feature-icon {
  font-size: 40px;
  margin-bottom: 16px;
}

.feature-title {
  font-size: var(--font-size-body);
  font-weight: 600;
  margin-bottom: 8px;
}

.feature-desc {
  font-size: var(--font-size-small);
  color: var(--color-text-secondary);
}

/* Page Header */
.page-header {
  padding: 140px 0 80px;
  text-align: center;
  background: var(--color-bg-secondary);
}

.page-title {
  font-size: var(--font-size-h1);
  font-weight: 700;
  letter-spacing: -1px;
  margin-bottom: 12px;
}

.page-subtitle {
  font-size: var(--font-size-body);
  color: var(--color-text-secondary);
}

/* About Page */
.about-story {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-lg);
  align-items: center;
}

@media (min-width: 768px) {
  .about-story {
    grid-template-columns: 1fr 1fr;
  }
}

.about-story:nth-child(even) .about-story-content {
  order: -1;
}

.about-story-content h3 {
  font-size: var(--font-size-h3);
  font-weight: 700;
  margin-bottom: 16px;
}

.about-story-content p {
  color: var(--color-text-secondary);
  line-height: 1.8;
}

.about-story-image {
  aspect-ratio: 16/10;
  background: var(--color-bg-secondary);
  border-radius: 12px;
  overflow: hidden;
}

/* Store Info */
.store-info {
  background: var(--color-bg-dark);
  color: var(--color-text-inverse);
  padding: var(--spacing-lg) 0;
}

.store-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-md);
  text-align: center;
}

@media (min-width: 768px) {
  .store-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.store-item h4 {
  font-size: var(--font-size-small);
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--color-text-secondary);
  margin-bottom: 8px;
}

.store-item p {
  font-size: var(--font-size-body);
}

/* Products Filter */
.products-filter {
  display: flex;
  justify-content: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: var(--spacing-lg);
}

.filter-btn {
  padding: 10px 20px;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: 980px;
  font-size: var(--font-size-small);
  cursor: pointer;
  transition: all 0.3s var(--transition-smooth);
}

.filter-btn:hover,
.filter-btn.active {
  background: var(--color-accent);
  color: var(--color-text-inverse);
  border-color: var(--color-accent);
}

/* Contact Section */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-lg);
}

@media (min-width: 768px) {
  .contact-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.contact-info {
  padding: 40px;
  background: var(--color-bg-secondary);
  border-radius: 12px;
}

.contact-info h3 {
  font-size: var(--font-size-h3);
  font-weight: 700;
  margin-bottom: 24px;
}

.contact-item {
  margin-bottom: 20px;
}

.contact-item h4 {
  font-size: var(--font-size-small);
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--color-text-secondary);
  margin-bottom: 8px;
}

.contact-item p {
  font-size: var(--font-size-body);
}

.wechat-qr {
  width: 180px;
  height: 180px;
  background: var(--color-bg-primary);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-secondary);
  margin-top: 16px;
}

/* Contact Form */
.contact-form {
  padding: 40px;
  background: var(--color-bg-secondary);
  border-radius: 12px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: var(--font-size-small);
  font-weight: 500;
  margin-bottom: 8px;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 14px 16px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  font-size: var(--font-size-body);
  font-family: inherit;
  background: var(--color-bg-primary);
  transition: border-color 0.3s;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-accent);
}

.form-group textarea {
  min-height: 120px;
  resize: vertical;
}

.form-submit {
  width: 100%;
  padding: 16px;
  background: var(--color-accent);
  color: var(--color-text-inverse);
  border: none;
  border-radius: 8px;
  font-size: var(--font-size-body);
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s var(--transition-smooth);
}

.form-submit:hover {
  background: var(--color-accent-hover);
}

/* Footer */
.footer {
  background: var(--color-bg-dark);
  color: var(--color-text-inverse);
  padding: var(--spacing-lg) 0;
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
  text-align: center;
}

.footer-logo {
  font-size: 20px;
  font-weight: 600;
}

.footer-links {
  display: flex;
  gap: 24px;
  list-style: none;
}

.footer-links a {
  font-size: var(--font-size-small);
  color: var(--color-text-secondary);
  transition: color 0.3s;
}

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

.footer-copyright {
  font-size: var(--font-size-caption);
  color: var(--color-text-secondary);
}

/* Scroll Animation */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: all 0.8s var(--transition-smooth);
}

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

/* Product Modal */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.8);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s;
}

.modal.active {
  opacity: 1;
  visibility: visible;
}

.modal-content {
  background: var(--color-bg-primary);
  border-radius: 12px;
  max-width: 600px;
  width: 90%;
  max-height: 90vh;
  overflow-y: auto;
  transform: scale(0.9);
  transition: transform 0.3s var(--transition-smooth);
}

.modal.active .modal-content {
  transform: scale(1);
}

.modal-close {
  position: absolute;
  top: 20px;
  right: 20px;
  width: 40px;
  height: 40px;
  background: var(--color-bg-secondary);
  border: none;
  border-radius: 50%;
  font-size: 20px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-image {
  aspect-ratio: 4/3;
  background: var(--color-bg-secondary);
}

.modal-body {
  padding: 24px;
}

.modal-title {
  font-size: var(--font-size-h3);
  font-weight: 700;
  margin-bottom: 8px;
}

.modal-price {
  font-size: var(--font-size-body);
  color: var(--color-text-secondary);
  margin-bottom: 16px;
}

.modal-desc {
  color: var(--color-text-secondary);
  line-height: 1.8;
}

/* Utility */
.text-center { text-align: center; }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }