/* ==========================================
   CSS 自定义变量
   ========================================== */
:root {
  /* 主色调 */
  --primary-color: #165DFF;
  --primary-hover: #0E4FBF;
  --primary-light: #4080FF;
  --primary-dark: #0A3A99;

  /* 辅助色 */
  --secondary-color: #14C9C9;
  --accent-color: #F7BA1E;
  --success-color: #00B42A;
  --warning-color: #FF7D00;
  --error-color: #F53F3F;

  /* 背景色 */
  --bg-primary: #FFFFFF;
  --bg-secondary: #F7F8FA;
  --bg-dark: #1D2129;
  --bg-gradient: linear-gradient(135deg, #165DFF 0%, #0A3A99 100%);

  /* 文字颜色 */
  --text-primary: #1D2129;
  --text-secondary: #4E5969;
  --text-tertiary: #86909C;
  --text-white: #FFFFFF;

  /* 边框颜色 */
  --border-color: #E5E6EB;
  --border-hover: #C9CDD4;

  /* 阴影 */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.16);

  /* 间距 */
  --spacing-xs: 8px;
  --spacing-sm: 16px;
  --spacing-md: 24px;
  --spacing-lg: 32px;
  --spacing-xl: 48px;

  /* 圆角 */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;

  /* 过渡 */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
}

/* ==========================================
   平滑滚动
   ========================================== */
html {
  scroll-behavior: smooth;
}

/* ==========================================
   导航栏滚动效果
   ========================================== */
.navbar {
  transition: background-color var(--transition-normal),
              box-shadow var(--transition-normal),
              padding var(--transition-normal);
}

/* 滚动时的导航栏样式 */
.navbar.scrolled {
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-sm);
  padding: 12px 0;
}

.navbar.scrolled .nav-link {
  color: var(--text-primary);
}

.navbar.scrolled .nav-link:hover {
  color: var(--primary-color);
}

/* ==========================================
   按钮样式和悬停效果
   ========================================== */
.btn {
  position: relative;
  overflow: hidden;
  transition: all var(--transition-normal);
  border: none;
  cursor: pointer;
}

/* 主按钮 */
.btn-primary {
  background-color: var(--primary-color);
  color: var(--text-white);
}

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

.btn-primary:active {
  transform: translateY(0);
}

/* 次要按钮 */
.btn-outline {
  background-color: transparent;
  border: 2px solid var(--primary-color);
  color: var(--primary-color);
}

.btn-outline:hover {
  background-color: var(--primary-color);
  color: var(--text-white);
  transform: translateY(-2px);
}

/* 按钮加载状态 */
.btn.loading {
  pointer-events: none;
  opacity: 0.7;
}

.btn.loading::after {
  content: '';
  position: absolute;
  width: 16px;
  height: 16px;
  top: 50%;
  left: 50%;
  margin-left: -8px;
  margin-top: -8px;
  border: 2px solid transparent;
  border-top-color: currentColor;
  border-radius: 50%;
  animation: button-loading-spinner 0.6s linear infinite;
}

@keyframes button-loading-spinner {
  from {
    transform: rotate(0turn);
  }
  to {
    transform: rotate(1turn);
  }
}

/* ==========================================
   卡片悬停效果
   ========================================== */
.service-card,
.news-card,
.case-card,
.team-card {
  transition: transform var(--transition-normal),
              box-shadow var(--transition-normal);
  cursor: pointer;
}

.service-card:hover,
.news-card:hover,
.case-card:hover,
.team-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}

/* 服务卡片图标动画 */
.service-card:hover .service-icon {
  transform: scale(1.1) rotate(5deg);
  transition: transform var(--transition-normal);
}

/* 新闻卡片图片缩放 */
.news-card:hover .news-image {
  transform: scale(1.05);
  transition: transform var(--transition-slow);
}

.news-image {
  overflow: hidden;
}

.news-image img {
  transition: transform var(--transition-slow);
}

/* 案例卡片遮罩效果 */
.case-card {
  position: relative;
  overflow: hidden;
}

.case-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(180deg, transparent 0%, rgba(0, 0, 0, 0.7) 100%);
  opacity: 0;
  transition: opacity var(--transition-normal);
  z-index: 1;
}

.case-card:hover::before {
  opacity: 1;
}

/* ==========================================
   滚动动画
   ========================================== */
/* 淡入动画 */
@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

.fade-in {
  animation: fadeIn var(--transition-slow) ease-out;
}

/* 从下往上滑入 */
@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.slide-up {
  animation: slideUp 0.6s ease-out;
}

/* 从左往右滑入 */
@keyframes slideLeft {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.slide-left {
  animation: slideLeft 0.6s ease-out;
}

/* 从右往左滑入 */
@keyframes slideRight {
  from {
    opacity: 0;
    transform: translateX(30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.slide-right {
  animation: slideRight 0.6s ease-out;
}

/* 缩放动画 */
@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.9);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

.scale-in {
  animation: scaleIn 0.5s ease-out;
}

/* 初始状态：隐藏元素 */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

/* 当元素进入视口时显示 */
.animate-on-scroll.animated {
  opacity: 1;
  transform: translateY(0);
}

/* ==========================================
   Hero 区块渐变背景
   ========================================== */
.hero-section {
  background: var(--bg-gradient);
  position: relative;
  overflow: hidden;
}

/* 动态渐变效果 */
.hero-section::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
  animation: hero-gradient-move 15s ease-in-out infinite;
}

@keyframes hero-gradient-move {
  0%, 100% {
    transform: translate(0, 0);
  }
  50% {
    transform: translate(10%, 10%);
  }
}

/* Hero 内容层级 */
.hero-content {
  position: relative;
  z-index: 2;
}

/* ==========================================
   表单样式优化
   ========================================== */
.form-control,
.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: 14px;
  transition: border-color var(--transition-fast),
              box-shadow var(--transition-fast);
  background-color: var(--bg-primary);
}

/* 聚焦效果 */
.form-control:focus,
.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(22, 93, 255, 0.1);
}

/* 错误状态 */
.form-control.error,
.form-input.error,
.form-textarea.error {
  border-color: var(--error-color);
}

.form-control.error:focus,
.form-input.error:focus,
.form-textarea.error:focus {
  box-shadow: 0 0 0 3px rgba(245, 63, 63, 0.1);
}

/* 成功状态 */
.form-control.success,
.form-input.success,
.form-textarea.success {
  border-color: var(--success-color);
}

.form-control.success:focus,
.form-input.success:focus,
.form-textarea.success:focus {
  box-shadow: 0 0 0 3px rgba(0, 180, 42, 0.1);
}

/* 禁用状态 */
.form-control:disabled,
.form-input:disabled,
.form-textarea:disabled,
.form-select:disabled {
  background-color: var(--bg-secondary);
  cursor: not-allowed;
  opacity: 0.6;
}

/* 表单错误提示 */
.form-error-message {
  color: var(--error-color);
  font-size: 12px;
  margin-top: 4px;
  display: flex;
  align-items: center;
  gap: 4px;
}

/* 表单成功提示 */
.form-success-message {
  color: var(--success-color);
  font-size: 12px;
  margin-top: 4px;
  display: flex;
  align-items: center;
  gap: 4px;
}

/* ==========================================
   响应式调整
   ========================================== */
/* 平板端 (768px - 1024px) */
@media (max-width: 1024px) {
  :root {
    --spacing-xl: 40px;
    --spacing-lg: 28px;
  }

  .service-card:hover,
  .news-card:hover,
  .case-card:hover {
    transform: translateY(-4px);
  }
}

/* 移动端 (< 768px) */
@media (max-width: 768px) {
  :root {
    --spacing-xl: 32px;
    --spacing-lg: 24px;
    --spacing-md: 20px;
  }

  /* 移动端禁用悬停效果 */
  .service-card:hover,
  .news-card:hover,
  .case-card:hover,
  .team-card:hover {
    transform: none;
  }

  /* 移动端按钮不上浮 */
  .btn-primary:hover,
  .btn-outline:hover {
    transform: none;
  }

  /* 移动端导航栏 */
  .navbar.scrolled {
    padding: 8px 0;
  }

  /* 移动端表单 */
  .form-control,
  .form-input,
  .form-textarea,
  .form-select {
    font-size: 16px; /* 防止 iOS 自动缩放 */
  }

  /* 移动端动画简化 */
  .animate-on-scroll {
    transform: translateY(20px);
  }
}

/* 小屏手机 (< 480px) */
@media (max-width: 480px) {
  :root {
    --spacing-xl: 24px;
    --spacing-lg: 20px;
    --spacing-md: 16px;
  }
}

/* ==========================================
   加载动画
   ========================================== */
/* 页面加载动画 */
.page-loader {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: var(--bg-primary);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 9999;
  transition: opacity var(--transition-normal), visibility var(--transition-normal);
}

.page-loader.hidden {
  opacity: 0;
  visibility: hidden;
}

/* 旋转加载器 */
.spinner {
  width: 48px;
  height: 48px;
  border: 4px solid var(--border-color);
  border-top-color: var(--primary-color);
  border-radius: 50%;
  animation: spinner-rotate 0.8s linear infinite;
}

@keyframes spinner-rotate {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

/* 脉冲加载器 */
.pulse-loader {
  display: flex;
  gap: 8px;
}

.pulse-loader span {
  width: 12px;
  height: 12px;
  background-color: var(--primary-color);
  border-radius: 50%;
  animation: pulse-animation 1.4s ease-in-out infinite;
}

.pulse-loader span:nth-child(2) {
  animation-delay: 0.2s;
}

.pulse-loader span:nth-child(3) {
  animation-delay: 0.4s;
}

@keyframes pulse-animation {
  0%, 80%, 100% {
    transform: scale(0.6);
    opacity: 0.5;
  }
  40% {
    transform: scale(1);
    opacity: 1;
  }
}

/* ==========================================
   工具类
   ========================================== */
/* 文本省略 */
.text-ellipsis {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.text-ellipsis-2 {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.text-ellipsis-3 {
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* 隐藏滚动条 */
.hide-scrollbar {
  -ms-overflow-style: none;
  scrollbar-width: none;
}

.hide-scrollbar::-webkit-scrollbar {
  display: none;
}

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

.custom-scrollbar::-webkit-scrollbar-track {
  background: var(--bg-secondary);
  border-radius: var(--radius-sm);
}

.custom-scrollbar::-webkit-scrollbar-thumb {
  background: var(--border-hover);
  border-radius: var(--radius-sm);
}

.custom-scrollbar::-webkit-scrollbar-thumb:hover {
  background: var(--text-tertiary);
}

/* 无选择 */
.no-select {
  user-select: none;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
}

/* 指针光标 */
.cursor-pointer {
  cursor: pointer;
}

/* 禁用状态 */
.disabled {
  opacity: 0.5;
  pointer-events: none;
  cursor: not-allowed;
}