/* ===== 日本保健品营销GEO网站 - 样式表 ===== */
/* Design System: Premium Japanese Health Supplements */

/* Google Fonts - Noto Sans SC for Chinese */
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@300;400;500;700&family=Noto+Serif+SC:wght@400;600;700&display=swap');

:root {
  /* Primary Colors */
  --color-black: #1a1a1a;
  --color-dark: #2d2d2d;
  --color-gold: #C8A96E;
  --color-gold-light: #D4B87A;
  --color-gold-dark: #A88B5A;
  
  /* Neutral Colors */
  --color-white: #ffffff;
  --color-warm-white: #f8f6f3;
  --color-light-gray: #f2f0ed;
  --color-gray: #e8e6e3;
  --color-medium-gray: #999;
  --color-text: #333333;
  --color-text-light: #666666;
  
  /* Accent Colors */
  --color-blue: #0066cc;
  --color-green: #2d8f4e;
  --color-red: #d63031;
  
  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 20px rgba(0,0,0,0.12);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.16);
  
  /* Typography */
  --font-sans: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-serif: 'Noto Serif SC', Georgia, 'Times New Roman', serif;
  
  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;
  --space-4xl: 96px;
  
  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background-color: var(--color-white);
  line-height: 1.6;
  overflow-x: hidden;
}

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

a {
  color: var(--color-gold-dark);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--color-gold);
}

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-serif);
  font-weight: 700;
  line-height: 1.3;
  color: var(--color-black);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

p {
  margin-bottom: var(--space-md);
  color: var(--color-text-light);
}

/* ===== Layout ===== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.section {
  padding: var(--space-4xl) 0;
}

.section-dark {
  background-color: var(--color-black);
  color: var(--color-white);
}

.section-dark h1, .section-dark h2, .section-dark h3 {
  color: var(--color-white);
}

.section-dark p {
  color: rgba(255,255,255,0.8);
}

.section-warm {
  background-color: var(--color-warm-white);
}

/* ===== Navigation ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(26, 26, 26, 0.95);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  height: 64px;
  display: flex;
  align-items: center;
  transition: background 0.3s ease;
}

.navbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
}

.navbar-logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  color: var(--color-white);
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 700;
}

.navbar-logo .logo-icon {
  width: 32px;
  height: 32px;
  background: var(--color-gold);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
}

.navbar-nav {
  display: flex;
  gap: var(--space-xl);
  list-style: none;
}

.navbar-nav a {
  color: rgba(255,255,255,0.8);
  font-size: 0.875rem;
  font-weight: 400;
  transition: color 0.2s;
}

.navbar-nav a:hover {
  color: var(--color-white);
}

.navbar-cta {
  background: var(--color-gold);
  color: var(--color-white) !important;
  padding: 8px 20px;
  border-radius: var(--radius-full);
  font-weight: 500;
  font-size: 0.875rem;
  transition: background 0.2s;
}

.navbar-cta:hover {
  background: var(--color-gold-light);
  color: var(--color-white) !important;
}

/* Mobile Menu */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--color-white);
  font-size: 1.5rem;
  cursor: pointer;
}

/* ===== Hero Section ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, var(--color-black) 0%, #2a2a2a 100%);
  overflow: hidden;
  padding-top: 64px;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="50" cy="50" r="0.5" fill="rgba(200,169,110,0.03)"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
  opacity: 0.5;
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
  padding: var(--space-3xl) var(--space-lg);
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  background: rgba(200, 169, 110, 0.15);
  border: 1px solid rgba(200, 169, 110, 0.3);
  color: var(--color-gold-light);
  padding: 8px 20px;
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: var(--space-xl);
}

.hero h1 {
  font-size: 3.5rem;
  color: var(--color-white);
  margin-bottom: var(--space-lg);
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.hero h1 span {
  color: var(--color-gold);
}

.hero-subtitle {
  font-size: 1.25rem;
  color: rgba(255,255,255,0.7);
  margin-bottom: var(--space-2xl);
  line-height: 1.6;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.hero-actions {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
  flex-wrap: wrap;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: var(--space-3xl);
  margin-top: var(--space-3xl);
  padding-top: var(--space-2xl);
  border-top: 1px solid rgba(255,255,255,0.1);
}

.hero-stat {
  text-align: center;
}

.hero-stat-number {
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-gold);
  display: block;
}

.hero-stat-label {
  font-size: 0.875rem;
  color: rgba(255,255,255,0.6);
  margin-top: var(--space-xs);
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 500;
  border-radius: var(--radius-full);
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
  gap: var(--space-sm);
}

.btn-primary {
  background: var(--color-gold);
  color: var(--color-white);
}

.btn-primary:hover {
  background: var(--color-gold-light);
  color: var(--color-white);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(200, 169, 110, 0.4);
}

.btn-outline {
  background: transparent;
  color: var(--color-white);
  border: 1px solid rgba(255,255,255,0.3);
}

.btn-outline:hover {
  background: rgba(255,255,255,0.1);
  color: var(--color-white);
  border-color: rgba(255,255,255,0.5);
}

.btn-dark {
  background: var(--color-black);
  color: var(--color-white);
}

.btn-dark:hover {
  background: var(--color-dark);
  color: var(--color-white);
}

.btn-sm {
  padding: 8px 20px;
  font-size: 0.875rem;
}

/* ===== Product Cards ===== */
.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-xl);
}

.product-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  border: 1px solid var(--color-gray);
}

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

.product-card-image {
  position: relative;
  height: 240px;
  background: var(--color-light-gray);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.product-card-image .product-emoji {
  font-size: 4rem;
}

.product-card-badge {
  position: absolute;
  top: var(--space-md);
  left: var(--space-md);
  background: var(--color-gold);
  color: var(--color-white);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 500;
}

.product-card-body {
  padding: var(--space-lg);
}

.product-card-category {
  font-size: 0.75rem;
  color: var(--color-gold-dark);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-sm);
}

.product-card-title {
  font-size: 1.125rem;
  margin-bottom: var(--space-sm);
  color: var(--color-black);
}

.product-card-desc {
  font-size: 0.875rem;
  color: var(--color-text-light);
  margin-bottom: var(--space-md);
  line-height: 1.5;
}

.product-card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-gray);
}

.product-card-price {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-black);
}

.product-card-link {
  font-size: 0.875rem;
  color: var(--color-gold-dark);
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.product-card-link:hover {
  color: var(--color-gold);
}

/* ===== Features Section ===== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
}

.feature-card {
  text-align: center;
  padding: var(--space-2xl);
  background: var(--color-white);
  border-radius: var(--radius-lg);
  transition: transform 0.3s ease;
}

.feature-card:hover {
  transform: translateY(-2px);
}

.feature-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--space-lg);
  background: linear-gradient(135deg, var(--color-gold) 0%, var(--color-gold-light) 100%);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
}

.feature-card h3 {
  font-size: 1.25rem;
  margin-bottom: var(--space-md);
}

.feature-card p {
  font-size: 0.9375rem;
  color: var(--color-text-light);
}

/* ===== Trust Section ===== */
.trust-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-xl);
  margin-top: var(--space-2xl);
}

.trust-item {
  text-align: center;
  padding: var(--space-xl);
}

.trust-number {
  font-family: var(--font-serif);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-gold);
  margin-bottom: var(--space-sm);
}

.trust-label {
  font-size: 0.9375rem;
  color: rgba(255,255,255,0.7);
}

/* ===== Testimonials ===== */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
}

.testimonial-card {
  background: var(--color-white);
  padding: var(--space-xl);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.testimonial-stars {
  color: var(--color-gold);
  margin-bottom: var(--space-md);
  font-size: 1rem;
}

.testimonial-text {
  font-size: 0.9375rem;
  color: var(--color-text);
  line-height: 1.6;
  margin-bottom: var(--space-lg);
  font-style: italic;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.testimonial-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--color-light-gray);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
}

.testimonial-info h4 {
  font-size: 0.9375rem;
  margin-bottom: 2px;
}

.testimonial-info p {
  font-size: 0.8125rem;
  color: var(--color-medium-gray);
  margin-bottom: 0;
}

/* ===== CTA Section ===== */
.cta-section {
  text-align: center;
  padding: var(--space-4xl) var(--space-lg);
}

.cta-section h2 {
  font-size: 2.25rem;
  margin-bottom: var(--space-lg);
}

.cta-section p {
  font-size: 1.125rem;
  max-width: 600px;
  margin: 0 auto var(--space-2xl);
  color: rgba(255,255,255,0.7);
}

.cta-actions {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
  flex-wrap: wrap;
}

/* ===== Footer ===== */
.footer {
  background: var(--color-black);
  color: rgba(255,255,255,0.7);
  padding: var(--space-3xl) 0 var(--space-xl);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-2xl);
  margin-bottom: var(--space-2xl);
}

.footer-brand h3 {
  color: var(--color-white);
  font-size: 1.25rem;
  margin-bottom: var(--space-md);
}

.footer-brand p {
  font-size: 0.875rem;
  color: rgba(255,255,255,0.6);
  line-height: 1.6;
}

.footer-links h4 {
  color: var(--color-white);
  font-size: 0.9375rem;
  margin-bottom: var(--space-lg);
}

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

.footer-links li {
  margin-bottom: var(--space-sm);
}

.footer-links a {
  color: rgba(255,255,255,0.6);
  font-size: 0.875rem;
  transition: color 0.2s;
}

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

.footer-bottom {
  padding-top: var(--space-xl);
  border-top: 1px solid rgba(255,255,255,0.1);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8125rem;
  color: rgba(255,255,255,0.4);
}

.footer-certifications {
  display: flex;
  gap: var(--space-md);
}

.footer-cert {
  padding: 4px 12px;
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
}

/* ===== Page Header ===== */
.page-header {
  background: linear-gradient(135deg, var(--color-black) 0%, #2a2a2a 100%);
  padding: 120px 0 60px;
  text-align: center;
}

.page-header h1 {
  color: var(--color-white);
  font-size: 2.5rem;
  margin-bottom: var(--space-md);
}

.page-header p {
  color: rgba(255,255,255,0.7);
  font-size: 1.125rem;
  max-width: 600px;
  margin: 0 auto;
}

.breadcrumb {
  display: flex;
  justify-content: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
  font-size: 0.875rem;
}

.breadcrumb a {
  color: rgba(255,255,255,0.6);
}

.breadcrumb span {
  color: rgba(255,255,255,0.4);
}

.breadcrumb .current {
  color: var(--color-gold);
}

/* ===== Product Detail ===== */
.product-detail {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: start;
}

.product-gallery {
  position: sticky;
  top: 100px;
}

.product-main-image {
  background: var(--color-light-gray);
  border-radius: var(--radius-lg);
  height: 400px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 6rem;
  margin-bottom: var(--space-md);
}

.product-thumbnails {
  display: flex;
  gap: var(--space-sm);
}

.product-thumbnail {
  width: 80px;
  height: 80px;
  background: var(--color-light-gray);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  cursor: pointer;
  border: 2px solid transparent;
  transition: border-color 0.2s;
}

.product-thumbnail.active {
  border-color: var(--color-gold);
}

.product-info h1 {
  font-size: 2rem;
  margin-bottom: var(--space-md);
}

.product-meta {
  display: flex;
  gap: var(--space-lg);
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-lg);
  border-bottom: 1px solid var(--color-gray);
}

.product-meta-item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 0.875rem;
  color: var(--color-text-light);
}

.product-price {
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-black);
  margin-bottom: var(--space-lg);
}

.product-price .currency {
  font-size: 1rem;
  font-weight: 400;
}

.product-description {
  margin-bottom: var(--space-xl);
}

.product-description h3 {
  font-size: 1.125rem;
  margin-bottom: var(--space-md);
}

.product-description p {
  font-size: 0.9375rem;
  line-height: 1.7;
}

.product-benefits {
  margin-bottom: var(--space-xl);
}

.product-benefits h3 {
  font-size: 1.125rem;
  margin-bottom: var(--space-md);
}

.benefits-list {
  list-style: none;
}

.benefits-list li {
  padding: var(--space-sm) 0;
  padding-left: var(--space-lg);
  position: relative;
  font-size: 0.9375rem;
  color: var(--color-text);
}

.benefits-list li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--color-green);
  font-weight: 700;
}

.product-actions {
  display: flex;
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
}

.product-quantity {
  display: flex;
  align-items: center;
  border: 1px solid var(--color-gray);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.product-quantity button {
  width: 40px;
  height: 40px;
  background: var(--color-light-gray);
  border: none;
  cursor: pointer;
  font-size: 1rem;
}

.product-quantity input {
  width: 60px;
  height: 40px;
  text-align: center;
  border: none;
  font-size: 1rem;
  font-family: var(--font-sans);
}

.product-channels {
  background: var(--color-warm-white);
  padding: var(--space-lg);
  border-radius: var(--radius-lg);
}

.product-channels h3 {
  font-size: 1rem;
  margin-bottom: var(--space-md);
}

.channel-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.channel-item {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-sm);
  background: var(--color-white);
  border-radius: var(--radius-md);
}

.channel-icon {
  width: 40px;
  height: 40px;
  background: var(--color-gold);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
}

.channel-info {
  flex: 1;
}

.channel-info h4 {
  font-size: 0.875rem;
  margin-bottom: 2px;
}

.channel-info p {
  font-size: 0.75rem;
  color: var(--color-medium-gray);
  margin-bottom: 0;
}

/* ===== Contact Form ===== */
.contact-form {
  max-width: 600px;
  margin: 0 auto;
}

.form-group {
  margin-bottom: var(--space-lg);
}

.form-group label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: var(--space-sm);
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 12px 16px;
  font-family: var(--font-sans);
  font-size: 1rem;
  border: 1px solid var(--color-gray);
  border-radius: var(--radius-md);
  transition: border-color 0.2s;
  background: var(--color-white);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--color-gold);
  box-shadow: 0 0 0 3px rgba(200, 169, 110, 0.1);
}

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

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .features-grid,
  .testimonials-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .trust-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .product-detail {
    grid-template-columns: 1fr;
  }
  
  .product-gallery {
    position: static;
  }
}

@media (max-width: 768px) {
  .menu-toggle {
    display: block;
  }
  
  .navbar-nav {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--color-black);
    flex-direction: column;
    padding: var(--space-lg);
    gap: var(--space-md);
  }
  
  .navbar-nav.active {
    display: flex;
  }
  
  .hero h1 {
    font-size: 2.25rem;
  }
  
  .hero-stats {
    flex-direction: column;
    gap: var(--space-lg);
  }
  
  .features-grid,
  .testimonials-grid,
  .products-grid {
    grid-template-columns: 1fr;
  }
  
  .trust-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-bottom {
    flex-direction: column;
    gap: var(--space-md);
    text-align: center;
  }
}

@media (max-width: 480px) {
  .hero h1 {
    font-size: 1.875rem;
  }
  
  .hero-actions {
    flex-direction: column;
  }
  
  .trust-grid {
    grid-template-columns: 1fr;
  }
}

/* ===== Animations ===== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-fade-in {
  animation: fadeInUp 0.6s ease forwards;
}

.animate-delay-1 { animation-delay: 0.1s; }
.animate-delay-2 { animation-delay: 0.2s; }
.animate-delay-3 { animation-delay: 0.3s; }

/* ===== Utility Classes ===== */
.text-center { text-align: center; }
.text-gold { color: var(--color-gold); }
.text-white { color: var(--color-white); }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }
.mb-2xl { margin-bottom: var(--space-2xl); }

/* Language Switcher */
.lang-switch {
  border: 1px solid var(--color-gold) !important;
  border-radius: var(--radius-full) !important;
  padding: 4px 16px !important;
  color: var(--color-gold) !important;
  font-size: 0.8125rem !important;
  letter-spacing: 0.05em;
  transition: all 0.2s ease;
}
.lang-switch:hover {
  background: var(--color-gold) !important;
  color: var(--color-white) !important;
}