/* 全局CSS变量 */
:root {
  --primary-color: #6366f1;
  --primary-hover: #4f46e5;
  --secondary-color: #8b5cf6;
  --secondary-hover: #7c3aed;
  --accent-color: #ec4899;
  --accent-hover: #db2777;
  --bg-color: #f8fafc;
  --text-color: #1e293b;
  --text-light: #64748b;
  --border-color: #e2e8f0;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --transition: all 0.3s ease;
  --gradient-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
  --gradient-secondary: linear-gradient(135deg, #ec4899 0%, #8b5cf6 100%);
}

/* 深色模式 */
[data-theme="dark"] {
  --bg-color: #0f172a;
  --text-color: #f1f5f9;
  --text-light: #cbd5e1;
  --border-color: #334155;
}

/* 全局样式重置 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
  line-height: 1.6;
  transition: var(--transition);
}

/* 滚动条样式 */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-color);
}

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

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

/* 链接样式 */
a {
  color: var(--primary-color);
  text-decoration: none;
  transition: var(--transition);
}

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

/* 按钮样式 */
.btn {
  display: inline-block;
  padding: 0.625rem 1.5rem;
  font-weight: 500;
  text-align: center;
  border-radius: 0.375rem;
  transition: var(--transition);
  cursor: pointer;
  border: none;
  outline: none;
}

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

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

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

.btn-secondary:hover {
  background: var(--primary-color);
  color: white;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* 卡片样式 */
.card {
  background: white;
  border-radius: 0.5rem;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  overflow: hidden;
}

[data-theme="dark"] .card {
  background: #1e293b;
}

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

/* 导航样式 */
nav a {
  position: relative;
}

nav a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: var(--transition);
}

nav a:hover::after {
  width: 100%;
}

/* 下拉菜单样式 */
.dropdown-menu {
  transition: all 0.3s ease;
  transform-origin: top left;
}

/* 汉堡菜单样式 */
.hamburger {
  cursor: pointer;
  transition: var(--transition);
}

.hamburger span {
  display: block;
  width: 25px;
  height: 3px;
  margin: 5px auto;
  background-color: var(--text-color);
  transition: all 0.3s ease;
}

.hamburger.active span:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.hamburger.active span:nth-child(2) {
  opacity: 0;
}

.hamburger.active span:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* 移动端菜单样式 */
.mobile-menu {
  transition: all 0.3s ease;
  transform-origin: top;
}

/* 动画类 */
.fade-in {
  animation: fadeIn 0.5s ease-in;
}

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

.slide-in-up {
  animation: slideInUp 0.5s ease-in;
}

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

.slide-in-down {
  animation: slideInDown 0.5s ease-in;
}

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

.slide-in-left {
  animation: slideInLeft 0.5s ease-in;
}

@keyframes slideInLeft {
  from {
    transform: translateX(-20px);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

.slide-in-right {
  animation: slideInRight 0.5s ease-in;
}

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

/* 悬浮效果 */
.hover-lift {
  transition: var(--transition);
}

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

/* 遮罩层 */
.overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  opacity: 0;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
}

.hover-overlay:hover .overlay {
  opacity: 1;
}

/* 标签样式 */
.tag {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  font-size: 0.75rem;
  font-weight: 500;
  border-radius: 9999px;
  background: var(--primary-color);
  color: white;
  transition: var(--transition);
}

.tag:hover {
  background: var(--primary-hover);
  transform: translateY(-1px);
}

/* 进度条样式 */
.progress-bar {
  height: 0.5rem;
  background: var(--border-color);
  border-radius: 9999px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: var(--gradient-primary);
  border-radius: 9999px;
  transition: width 0.5s ease;
}

/* 表单样式 */
.form-input {
  width: 100%;
  padding: 0.625rem 1rem;
  border: 1px solid var(--border-color);
  border-radius: 0.375rem;
  background: var(--bg-color);
  color: var(--text-color);
  transition: var(--transition);
}

.form-input:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

/* 响应式断点 */
@media (max-width: 767px) {
  .btn {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
  }
  
  .card {
    border-radius: 0.375rem;
  }
}

/* 作品集项目样式 */
.project-item {
  position: relative;
  overflow: hidden;
  border-radius: 0.5rem;
}

.project-item img {
  transition: var(--transition);
}

.project-item:hover img {
  transform: scale(1.05);
}

.project-item .project-info {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.8), transparent);
  color: white;
  padding: 2rem 1.5rem 1.5rem;
  transform: translateY(100%);
  transition: var(--transition);
}

.project-item:hover .project-info {
  transform: translateY(0);
}

/* 技能标签样式 */
.skill-tag {
  display: inline-block;
  padding: 0.375rem 0.875rem;
  margin: 0.25rem;
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: 9999px;
  background: var(--primary-color);
  color: white;
  transition: var(--transition);
}

.skill-tag:hover {
  background: var(--primary-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* 回到顶部按钮 */
#back-to-top {
  transition: var(--transition);
}

/* 阅读进度条 */
#reading-progress {
  transition: width 0.1s ease;
}

/* 深色模式切换按钮 */
#dark-mode-toggle {
  transition: var(--transition);
}

#dark-mode-toggle:hover {
  transform: rotate(180deg);
}

/* 加载动画 */
.loading {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 3px solid rgba(99, 102, 241, 0.3);
  border-radius: 50%;
  border-top-color: var(--primary-color);
  animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* 分隔线样式 */
.divider {
  height: 1px;
  background: var(--border-color);
  margin: 2rem 0;
}

/* 标题样式 */
h1, h2, h3, h4, h5, h6 {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* 图片懒加载 */
img.lazy {
  opacity: 0;
  transition: opacity 0.5s ease;
}

img.lazy.loaded {
  opacity: 1;
}

/* 筛选按钮 */
.filter-btn {
  padding: 0.5rem 1rem;
  border: 2px solid var(--border-color);
  border-radius: 9999px;
  background: transparent;
  color: var(--text-color);
  cursor: pointer;
  transition: var(--transition);
}

.filter-btn:hover {
  border-color: var(--primary-color);
  background: var(--primary-color);
  color: white;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.filter-btn.active {
  background: var(--primary-color);
  color: white;
  border-color: var(--primary-color);
}

/* 模态框样式 */
.modal {
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  z-index: 50;
}

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

.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
}

.modal-content {
  position: relative;
  background: white;
  border-radius: 0.5rem;
  box-shadow: var(--shadow-xl);
  max-width: 90vw;
  max-height: 90vh;
  overflow-y: auto;
}

[data-theme="dark"] .modal-content {
  background: #1e293b;
}

/* 计数器动画 */
.counter {
  counter-reset: count var(--count);
}

/* 滑块样式 */
.slider {
  position: relative;
  overflow: hidden;
}

.slider-track {
  display: flex;
  transition: transform 0.5s ease;
}

.slider-item {
  flex-shrink: 0;
  width: 100%;
}

/* 导航指示器 */
.nav-indicator {
  display: inline-block;
  width: 8px;
  height: 8px;
  margin: 0 4px;
  border-radius: 50%;
  background: var(--border-color);
  cursor: pointer;
  transition: var(--transition);
}

.nav-indicator.active {
  background: var(--primary-color);
  width: 24px;
  border-radius: 4px;
}

/* 团队成员卡片 */
.team-member {
  text-align: center;
  transition: var(--transition);
}

.team-member:hover {
  transform: translateY(-8px);
}

.team-member .member-image {
  position: relative;
  width: 150px;
  height: 150px;
  margin: 0 auto 1rem;
  border-radius: 50%;
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.team-member .member-social {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.8), transparent);
  transform: translateY(100%);
  transition: var(--transition);
  padding: 1rem;
}

.team-member:hover .member-social {
  transform: translateY(0);
}

/* 客户评价样式 */
.testimonial {
  background: white;
  padding: 2rem;
  border-radius: 0.5rem;
  box-shadow: var(--shadow-md);
  transition: var(--transition);
}

[data-theme="dark"] .testimonial {
  background: #1e293b;
}

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

.testimonial .rating {
  color: #fbbf24;
  margin-bottom: 1rem;
}

/* 价格表样式 */
.pricing-card {
  background: white;
  border-radius: 0.5rem;
  box-shadow: var(--shadow-md);
  transition: var(--transition);
  overflow: hidden;
}

[data-theme="dark"] .pricing-card {
  background: #1e293b;
}

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

.pricing-card.featured {
  border: 2px solid var(--primary-color);
  transform: scale(1.05);
}

.pricing-card .price {
  font-size: 2.5rem;
  font-weight: bold;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* 常见问题折叠面板 */
.faq-btn {
  transition: var(--transition);
}

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

.faq-content {
  transition: all 0.3s ease;
  overflow: hidden;
}

/* 联系表单样式 */
#contact-form {
  transition: var(--transition);
}

#contact-form .form-group {
  margin-bottom: 1.5rem;
}

#contact-form .form-label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
  color: var(--text-color);
}

#contact-form .form-input {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1px solid var(--border-color);
  border-radius: 0.375rem;
  background: var(--bg-color);
  color: var(--text-color);
  transition: var(--transition);
}

#contact-form .form-input:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

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

#contact-form button[type="submit"] {
  transition: var(--transition);
}

#contact-form button[type="submit"]:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}