/* ================================
   暖巢 Hearthnest - Global Styles
   温暖现代设计 | Warm Modern Design
   ================================ */

:root {
  /* 主色调 - Main Colors */
  --primary-gold: #B8956A;
  --warm-cream: #F5EFE7;
  --soft-white: #FFFEF9;
  --warm-beige: #E8DCC4;
  
  /* 辅助色 - Supporting Colors */
  --deep-brown: #6B5344;
  --light-gold: #D4B895;
  --accent-rose: #D4A5A5;
  
  /* 文字颜色 - Text Colors */
  --text-dark: #3D3D3D;
  --text-light: #6B6B6B;
  --text-white: #FFFFFF;
  
  /* 阴影 - Shadows */
  --shadow-soft: 0 4px 20px rgba(184, 149, 106, 0.08);
  --shadow-medium: 0 8px 30px rgba(184, 149, 106, 0.12);
  --shadow-strong: 0 12px 40px rgba(184, 149, 106, 0.15);
  
  /* 圆角 - Border Radius */
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  
  /* 间距 - Spacing */
  --spacing-xs: 8px;
  --spacing-sm: 16px;
  --spacing-md: 32px;
  --spacing-lg: 48px;
  --spacing-xl: 64px;
  
  /* 过渡 - Transitions */
  --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: all 0.2s ease;
}

/* ================================
   全局重置 - Global Reset
   ================================ */

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 
               'Microsoft YaHei', sans-serif;
  background-color: var(--soft-white);
  color: var(--text-dark);
  line-height: 1.6;
  overflow-x: hidden;
}

/* ================================
   导航栏 - Navigation
   ================================ */

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255, 254, 249, 0.95);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-soft);
  z-index: 1000;
  transition: var(--transition-smooth);
}

.navbar.scrolled {
  background: rgba(255, 254, 249, 0.98);
  box-shadow: var(--shadow-medium);
}

.nav-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: var(--spacing-sm) var(--spacing-md);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.nav-logo img {
  height: 50px;
  width: auto;
}

.nav-logo-text {
  display: flex;
  flex-direction: column;
}

.nav-logo-cn {
  font-size: 24px;
  font-weight: 600;
  color: var(--primary-gold);
  line-height: 1.2;
}

.nav-logo-en {
  font-size: 11px;
  color: var(--text-light);
  letter-spacing: 1px;
  text-transform: uppercase;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: var(--spacing-md);
  align-items: center;
}

.nav-menu a {
  color: var(--text-dark);
  text-decoration: none;
  font-size: 15px;
  font-weight: 500;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  transition: var(--transition-fast);
  position: relative;
}

.nav-menu a:hover,
.nav-menu a.active {
  color: var(--primary-gold);
  background: var(--warm-cream);
}

.nav-menu a::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 50%;
  transform: translateX(-50%) scaleX(0);
  width: 80%;
  height: 2px;
  background: var(--primary-gold);
  transition: transform 0.3s ease;
}

.nav-menu a:hover::after {
  transform: translateX(-50%) scaleX(1);
}

.nav-cta {
  background: linear-gradient(135deg, var(--primary-gold), var(--light-gold));
  color: white !important;
  padding: 10px 24px !important;
  border-radius: 25px;
  font-weight: 600;
  box-shadow: var(--shadow-soft);
}

.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-medium);
  background: linear-gradient(135deg, var(--light-gold), var(--primary-gold)) !important;
}

.nav-cta::after {
  display: none;
}

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

.nav-toggle span {
  display: block;
  width: 25px;
  height: 3px;
  background: var(--primary-gold);
  margin: 5px 0;
  transition: var(--transition-fast);
  border-radius: 2px;
}

/* ================================
   页脚 - Footer
   ================================ */

.footer {
  background: linear-gradient(135deg, var(--deep-brown), var(--primary-gold));
  color: var(--text-white);
  padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.footer-section h3 {
  font-size: 20px;
  margin-bottom: var(--spacing-sm);
  color: var(--warm-cream);
}

.footer-section p,
.footer-section a {
  color: rgba(255, 255, 255, 0.85);
  text-decoration: none;
  display: block;
  margin-bottom: 8px;
  transition: var(--transition-fast);
}

.footer-section a:hover {
  color: var(--warm-cream);
  padding-left: 5px;
}

.footer-social {
  display: flex;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-sm);
}

.footer-social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  transition: var(--transition-fast);
}

.footer-social a:hover {
  background: var(--warm-cream);
  color: var(--primary-gold);
  transform: translateY(-3px);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.2);
  padding-top: var(--spacing-md);
  text-align: center;
  color: rgba(255, 255, 255, 0.7);
  font-size: 14px;
}

/* ================================
   按钮样式 - Buttons
   ================================ */

.btn {
  display: inline-block;
  padding: 14px 32px;
  border-radius: 30px;
  font-size: 16px;
  font-weight: 600;
  text-decoration: none;
  text-align: center;
  cursor: pointer;
  border: none;
  transition: var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-gold), var(--light-gold));
  color: white;
  box-shadow: var(--shadow-soft);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-strong);
}

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

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

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

.btn-white:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-medium);
}

/* ================================
   卡片样式 - Cards
   ================================ */

.card {
  background: white;
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  box-shadow: var(--shadow-soft);
  transition: var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary-gold), var(--light-gold));
  transform: scaleX(0);
  transition: var(--transition-smooth);
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-strong);
}

.card:hover::before {
  transform: scaleX(1);
}

/* ================================
   表单样式 - Forms
   ================================ */

.form-group {
  margin-bottom: var(--spacing-md);
}

.form-label {
  display: block;
  margin-bottom: 8px;
  color: var(--text-dark);
  font-weight: 500;
  font-size: 15px;
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 12px 16px;
  border: 2px solid var(--warm-beige);
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-family: inherit;
  color: var(--text-dark);
  background: var(--soft-white);
  transition: var(--transition-fast);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--primary-gold);
  box-shadow: 0 0 0 3px rgba(184, 149, 106, 0.1);
}

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

.form-checkbox {
  display: flex;
  align-items: center;
  gap: 10px;
}

.form-checkbox input {
  width: 20px;
  height: 20px;
  cursor: pointer;
}

/* ================================
   工具类 - Utility Classes
   ================================ */

.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

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

.section-title {
  font-size: 42px;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: var(--spacing-sm);
  text-align: center;
}

.section-subtitle {
  font-size: 18px;
  color: var(--text-light);
  text-align: center;
  max-width: 700px;
  margin: 0 auto var(--spacing-lg);
  line-height: 1.8;
}

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

.text-gold {
  color: var(--primary-gold);
}

.bg-cream {
  background-color: var(--warm-cream);
}

.mt-lg {
  margin-top: var(--spacing-lg);
}

.mb-lg {
  margin-bottom: var(--spacing-lg);
}

/* ================================
   响应式设计 - Responsive
   ================================ */

@media (max-width: 1024px) {
  .nav-menu {
    gap: var(--spacing-sm);
  }
  
  .section-title {
    font-size: 36px;
  }
}

@media (max-width: 768px) {
  .nav-toggle {
    display: block;
  }
  
  .nav-menu {
    position: fixed;
    top: 78px;
    left: -100%;
    width: 100%;
    background: rgba(255, 254, 249, 0.98);
    backdrop-filter: blur(10px);
    flex-direction: column;
    padding: var(--spacing-md);
    box-shadow: var(--shadow-medium);
    transition: var(--transition-smooth);
    gap: 0;
  }
  
  .nav-menu.active {
    left: 0;
  }
  
  .nav-menu a {
    width: 100%;
    padding: var(--spacing-sm);
    text-align: center;
  }
  
  .section-title {
    font-size: 32px;
  }
  
  .section-subtitle {
    font-size: 16px;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }
}

@media (max-width: 480px) {
  :root {
    --spacing-md: 24px;
    --spacing-lg: 32px;
    --spacing-xl: 48px;
  }
  
  .nav-logo-cn {
    font-size: 20px;
  }
  
  .section-title {
    font-size: 28px;
  }
  
  .btn {
    padding: 12px 24px;
    font-size: 14px;
  }
}

/* ================================
   动画效果 - Animations
   ================================ */

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

.fade-in-up {
  animation: fadeInUp 0.6s ease-out;
}

.fade-in {
  animation: fadeIn 0.6s ease-out;
}

/* ================================
   滚动动画 - Scroll Animations
   ================================ */

.scroll-reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.scroll-reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}