@import url('https://fonts.googleapis.com/css2?family=Lato:wght@300;400;700&family=Playfair+Display:wght@400;500;600;700&display=swap');

/* CSS变量系统 */
:root {
  /* 主色调 - 奢华金色系 */
  --primary-gold: #D4AF37;
  --primary-gold-light: #F7E98E;
  --primary-gold-dark: #B8860B;
  
  /* 辅助色 - 深邃蓝色系 */
  --secondary-navy: #1B2951;
  --secondary-navy-light: #2C3E50;
  
  /* 中性色 - 温暖灰色系 */
  --neutral-warm: #F8F6F0;
  --neutral-cool: #E8E2D5;
  --neutral-white: #FDFBF7;
  --neutral-dark: #3D3D3D;
  
  /* 渐变色 */
  --gradient-gold: linear-gradient(135deg, #D4AF37, #F7E98E);
  --gradient-dark: linear-gradient(135deg, #1B2951, #2C3E50);
  --gradient-overlay: linear-gradient(135deg, rgba(212, 175, 55, 0.9), rgba(247, 233, 142, 0.9));
  
  /* 阴影系统 */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 15px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.15);
  --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.2);
  
  /* 动画时间 */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
}

/* 基础样式 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Lato', sans-serif;
  background-color: var(--neutral-white);
  color: var(--neutral-dark);
  line-height: 1.6;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6, .font-serif {
  font-family: 'Playfair Display', serif;
  font-weight: 500;
}

/* 玻璃拟态效果 */
.glass-morphism {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(15px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  box-shadow: var(--shadow-lg);
}

/* 3D卡片效果 */
.card-3d {
  transform-style: preserve-3d;
  transition: transform var(--transition-normal);
  cursor: pointer;
  will-change: transform;
}

.card-3d:hover {
  transform: translateY(-10px) rotateX(5deg) rotateY(5deg);
  box-shadow: var(--shadow-xl);
}

/* 磁性按钮效果 */
.magnetic-btn {
  position: relative;
  transition: all var(--transition-normal);
  overflow: hidden;
  will-change: transform;
}

.magnetic-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: var(--gradient-gold);
  transition: left var(--transition-normal);
  z-index: -1;
}

.magnetic-btn:hover::before {
  left: 0;
}

.magnetic-btn:hover {
  color: white;
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

/* 高级项目卡片 */
.project-card-advanced {
  position: relative;
  border-radius: 12px;
  overflow: hidden;
  background: white;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
  will-change: transform;
}

.project-card-advanced:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
}

.project-card-advanced .image-container {
  position: relative;
  overflow: hidden;
  height: 300px;
}

.project-card-advanced .image-container img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
  /* 添加懒加载支持 */
  loading: lazy;
}

.project-card-advanced:hover .image-container img {
  transform: scale(1.1);
}

.project-card-advanced .overlay-info {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--gradient-overlay);
  color: white;
  padding: 2rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.project-card-advanced:hover .overlay-info {
  opacity: 1;
}

.project-card-advanced .project-tags {
  display: flex;
  gap: 0.5rem;
  margin-top: 1rem;
}

.project-card-advanced .tag {
  background: rgba(255, 255, 255, 0.2);
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  font-size: 0.8rem;
  backdrop-filter: blur(10px);
}

.project-card-advanced .project-stats {
  padding: 1.5rem;
  display: flex;
  justify-content: space-between;
  background: linear-gradient(135deg, #f8f9fa, #e9ecef);
}

.project-card-advanced .stat {
  text-align: center;
}

.project-card-advanced .stat .number {
  display: block;
  font-size: 1.5rem;
  font-weight: bold;
  color: var(--primary-gold);
}

.project-card-advanced .stat .label {
  font-size: 0.8rem;
  color: #666;
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* 导航系统升级 */
.header-advanced {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(253, 251, 247, 0.95);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(234, 229, 222, 0.5);
  transition: all var(--transition-normal);
  will-change: scroll-position;
}

.header-advanced.scrolled {
  background: rgba(253, 251, 247, 0.98);
  box-shadow: var(--shadow-md);
}

.mega-menu {
  position: relative;
}

.nav-item {
  position: relative;
}

.dropdown-mega {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  background: white;
  border-radius: 12px;
  box-shadow: var(--shadow-xl);
  padding: 2rem;
  min-width: 400px;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

.nav-item:hover .dropdown-mega {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(10px);
}

.service-preview {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.service-preview img {
  width: 80px;
  height: 80px;
  border-radius: 8px;
  object-fit: cover;
}

/* 视差滚动容器 */
.parallax-container {
  position: relative;
  overflow: hidden;
}

.parallax-bg {
  position: absolute;
  top: -20%;
  left: 0;
  width: 100%;
  height: 120%;
  background-attachment: fixed;
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;
  will-change: transform;
}

/* 粒子动画背景 */
.particles-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 1;
}

.particle {
  position: absolute;
  width: 2px;
  height: 2px;
  background: var(--primary-gold);
  border-radius: 50%;
  opacity: 0.6;
  animation: float 6s ease-in-out infinite;
  will-change: transform;
}

@keyframes float {
  0%, 100% { transform: translateY(0px) rotate(0deg); }
  50% { transform: translateY(-20px) rotate(180deg); }
}

/* 滚动进度条 */
.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 0%;
    height: 3px;
    background: var(--gradient-gold);
    z-index: 9999;
    transition: width 0.1s ease;
    will-change: width;
}

/* 品牌Loading动画 */
.brand-loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #FDFBF7 0%, #F8F6F0 100%);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    opacity: 1;
    visibility: visible;
    transition: all 0.8s ease;
    will-change: opacity, visibility;
}

.brand-loader.fade-out {
    opacity: 0;
    visibility: hidden;
}

.loader-logo {
    width: 80px;
    height: 80px;
    margin-bottom: 20px;
    position: relative;
}

.loader-icon {
    width: 100%;
    height: 100%;
    border: 3px solid #E8E2D5;
    border-top: 3px solid var(--primary-gold);
    border-radius: 50%;
    animation: spin 1.5s linear infinite;
    position: relative;
    will-change: transform;
}

.loader-icon::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 30px;
    height: 40px;
    background: var(--gradient-gold);
    border-radius: 50% 50% 50% 50% / 60% 60% 40% 40%;
    animation: pulse 2s ease-in-out infinite;
}

.loader-text {
    font-family: 'Playfair Display', serif;
    font-size: 24px;
    font-weight: 600;
    color: var(--primary-gold);
    margin-bottom: 10px;
    animation: fadeInUp 1s ease-out;
}

.loader-subtitle {
    font-family: 'Lato', sans-serif;
    font-size: 14px;
    color: #666;
    letter-spacing: 2px;
    animation: fadeInUp 1s ease-out 0.3s both;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

@keyframes pulse {
    0%, 100% { 
        transform: translate(-50%, -50%) scale(1);
        opacity: 1;
    }
    50% { 
        transform: translate(-50%, -50%) scale(1.1);
        opacity: 0.8;
    }
}

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

/* 移动端触摸优化 */
@media (max-width: 768px) {
    /* 增大触摸目标 */
    .magnetic-btn, button, .btn, a[href] {
        min-height: 48px;
        min-width: 48px;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        padding: 12px 16px;
    }
    
    /* 移动端导航优化 */
    .header-advanced nav a {
        padding: 16px 20px;
        font-size: 18px;
    }
    
    /* 项目卡片触摸优化 */
    .project-card-advanced {
        margin-bottom: 20px;
        border-radius: 12px;
        overflow: hidden;
    }
    
    /* 表单输入框优化 */
    input, textarea, select {
        min-height: 48px;
        font-size: 16px; /* 防止iOS缩放 */
        padding: 12px 16px;
    }
    
    /* 社交图标触摸优化 */
    footer .flex a {
        min-width: 48px;
        min-height: 48px;
        display: flex;
        align-items: center;
        justify-content: center;
    }
}

/* 触摸设备优化 */
@media (hover: none) and (pointer: coarse) {
    .card-3d:hover {
        transform: none;
    }
    
    .magnetic-btn:hover {
        transform: none;
    }
    
    /* 移除悬停效果，使用点击效果 */
    .project-card-advanced:active {
        transform: scale(0.98);
        transition: transform 0.1s ease;
    }
    
    .magnetic-btn:active {
        transform: scale(0.95);
        background: var(--primary-gold-dark);
    }
}

/* 回到顶部按钮样式 */
.back-to-top {
  position: fixed;
  bottom: 20px;
  right: 20px;
  width: 50px;
  height: 50px;
  background: var(--primary-gold);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all 0.3s ease;
  z-index: 1000;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  transform: translateY(-3px);
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

/* WhatsApp联系按钮样式 */
.whatsapp-contact {
  position: fixed;
  bottom: 80px;
  right: 20px;
  width: 50px;
  height: 50px;
  background: #25D366;
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all 0.3s ease;
  z-index: 1000;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.whatsapp-contact:hover {
  transform: translateY(-3px);
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.back-to-top.visible ~ .whatsapp-contact {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.whatsapp-contact:hover {
  background: #128C7E;
}

/* 面包屑导航优化 */
.breadcrumb {
  display: flex;
  align-items: center;
  font-size: 0.9rem;
}

.breadcrumb a {
  color: var(--text-gray);
  text-decoration: none;
  transition: color 0.3s ease;
}

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

.breadcrumb span:last-child {
  color: var(--text-dark);
  font-weight: 500;
}

.breadcrumb i {
  margin: 0 0.5rem;
  color: var(--text-light);
  font-size: 0.8rem;
}

/* 锚点链接样式 */
.anchor-link {
  color: var(--primary-gold);
  text-decoration: none;
  font-size: 0.9rem;
  margin-left: 0.5rem;
  opacity: 0;
  transition: opacity 0.3s ease;
}

h2:hover .anchor-link,
h3:hover .anchor-link {
  opacity: 1;
}

/* 页面跳转动画 */
.page-transition {
  opacity: 0;
  transform: translateY(20px);
  animation: fadeInUp 0.6s ease forwards;
}

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

/* 表单焦点状态增强 */
.form-input-advanced:focus {
  outline: none;
  border-color: var(--primary-gold);
  box-shadow: 0 0 0 3px rgba(212, 175, 55, 0.1);
}

.form-input-advanced:focus + .form-label-advanced {
  color: var(--primary-gold);
}

/* 按钮悬停效果优化 */
.magnetic-btn {
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

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

.magnetic-btn:active {
  transform: translateY(-1px);
}

/* 内容目录样式 */
.table-of-contents {
  background: #f9f9f9;
  border-radius: 12px;
  padding: 1.5rem;
  margin: 2rem 0;
}

.table-of-contents h3 {
  font-size: 1.2rem;
  margin-bottom: 1rem;
  color: var(--text-dark);
}

.table-of-contents ul {
  list-style: none;
  padding: 0;
}

.table-of-contents li {
  margin-bottom: 0.5rem;
}

.table-of-contents a {
  color: var(--text-gray);
  text-decoration: none;
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  transition: color 0.3s ease;
}

.table-of-contents a:hover {
  color: var(--primary-gold);
}

.table-of-contents a::before {
  content: "•";
  color: var(--primary-gold);
  margin-right: 0.5rem;
}

/* 响应式断点优化 */
@media (max-width: 768px) {
  .table-of-contents {
    padding: 1rem;
  }
  
  .back-to-top {
    width: 40px;
    height: 40px;
    font-size: 1rem;
    bottom: 15px;
    right: 15px;
  }
}

/* 自定义滚动条 */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--neutral-cool);
}

::-webkit-scrollbar-thumb {
  background: var(--gradient-gold);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--primary-gold-dark);
}

/* 选择文本样式 */
::selection {
  background: var(--primary-gold);
  color: white;
}

/* 焦点可见性 */
.focus-visible {
  outline: 2px solid var(--primary-gold);
  outline-offset: 2px;
}

/* 国际化大集团专业感增强样式 */
.container {
  max-width: 1280px;
}

/* 专业感标题样式 */
.section-title {
  font-family: 'Playfair Display', serif;
  font-weight: 600;
  position: relative;
  padding-bottom: 15px;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 3px;
  background: var(--primary-gold);
}

.section-title.left-aligned::after {
  left: 0;
  transform: none;
}

/* 专业感按钮样式 */
.btn-primary {
  display: inline-block;
  padding: 14px 32px;
  background: var(--gradient-gold);
  color: #000;
  font-weight: 600;
  text-decoration: none;
  border-radius: 0;
  transition: all 0.3s ease;
  border: 1px solid var(--primary-gold);
  text-transform: uppercase;
  letter-spacing: 1px;
  font-size: 0.9rem;
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  color: #000;
}

.btn-secondary {
  display: inline-block;
  padding: 14px 32px;
  background: transparent;
  color: var(--neutral-dark);
  font-weight: 600;
  text-decoration: none;
  border-radius: 0;
  transition: all 0.3s ease;
  border: 1px solid var(--neutral-dark);
  text-transform: uppercase;
  letter-spacing: 1px;
  font-size: 0.9rem;
}

.btn-secondary:hover {
  background: var(--neutral-dark);
  color: white;
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

/* 专业感卡片样式 */
.card-professional {
  background: white;
  border: 1px solid #eee;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.card-professional::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--primary-gold);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
}

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

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

/* 专业统计数据展示 */
.stats-section {
  background: linear-gradient(rgba(27, 41, 81, 0.9), rgba(27, 41, 81, 0.9)), url('https://images.unsplash.com/photo-1519010470956-6d877008eaa4?w=1200') center/cover;
  color: white;
  padding: 100px 0;
}

.stat-item {
  text-align: center;
  padding: 20px;
}

.stat-number {
  font-size: 3rem;
  font-weight: 700;
  color: var(--primary-gold);
  margin-bottom: 10px;
  font-family: 'Playfair Display', serif;
}

.stat-label {
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: #ccc;
}

/* 专业团队展示 */
.team-member {
  text-align: center;
  padding: 30px 20px;
  transition: all 0.3s ease;
}

.team-member:hover {
  background: white;
  box-shadow: var(--shadow-md);
}

.member-photo {
  width: 150px;
  height: 150px;
  border-radius: 50%;
  object-fit: cover;
  margin: 0 auto 20px;
  border: 3px solid var(--primary-gold);
}

.member-name {
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: 5px;
}

.member-title {
  color: var(--primary-gold);
  font-size: 0.9rem;
  margin-bottom: 15px;
}

.member-bio {
  font-size: 0.9rem;
  color: var(--neutral-light);
}

/* 客户评价展示 */
.testimonial-card {
  background: white;
  padding: 30px;
  border-left: 3px solid var(--primary-gold);
  box-shadow: var(--shadow-md);
  margin: 20px;
}

.testimonial-content {
  font-style: italic;
  margin-bottom: 20px;
  position: relative;
}

.testimonial-content::before {
  content: '"';
  font-size: 4rem;
  color: var(--primary-gold);
  opacity: 0.2;
  position: absolute;
  left: -20px;
  top: -30px;
  font-family: serif;
}

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

.author-avatar {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  object-fit: cover;
  margin-right: 15px;
}

.author-info h4 {
  font-weight: 600;
  margin-bottom: 3px;
}

.author-info p {
  color: var(--neutral-light);
  font-size: 0.9rem;
}

/* 合作伙伴展示 */
.partner-logo {
  height: 60px;
  filter: grayscale(100%);
  opacity: 0.6;
  transition: all 0.3s ease;
  margin: 20px 0;
}

.partner-logo:hover {
  filter: grayscale(0);
  opacity: 1;
  transform: scale(1.1);
}

/* 专业感页脚 */
.footer-professional {
  background: #1a1a1a;
  color: #ccc;
  padding: 70px 0 0;
}

.footer-title {
  color: white;
  font-size: 1.2rem;
  margin-bottom: 25px;
  position: relative;
  padding-bottom: 10px;
}

.footer-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 40px;
  height: 2px;
  background: var(--primary-gold);
}

.footer-link {
  color: #aaa;
  text-decoration: none;
  transition: all 0.3s ease;
  display: block;
  margin-bottom: 10px;
}

.footer-link:hover {
  color: var(--primary-gold);
  padding-left: 5px;
}

.footer-bottom {
  border-top: 1px solid #333;
  padding: 25px 0;
  margin-top: 50px;
  text-align: center;
  font-size: 0.9rem;
  color: #777;
}