/* ============================================
   CLOUDSAIL - Custom Styles
   自定义样式文件,用于覆盖和扩展TailwindCSS
   ============================================ */

/* CSS变量定义 */
:root {
  --primary-blue: #2468F2;
  --primary-green: #05AA73;
  --text-dark: #222222;
  --text-gray: #222222;
  --bg-light: #F2F6FA;
  --bg-white: #FFFFFF;
  --container-width: 1360px;
  --spacing-unit: 8px;
  --border-radius: 20px;
  --transition-speed: 0.3s;
}

/* ============================================
   响应式容器
   ============================================ */
.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 20px;
}

/* ============================================
   按钮动画 (提取重复样式)
   ============================================ */
.try-out:hover img {
  transition: transform 0.5s ease-in-out;
  animation: slide-right 1s infinite;
}

@keyframes slide-right {
  0%, 100% {
    transform: translateX(0);
  }
  50% {
    transform: translateX(10px);
  }
}

/* ============================================
   服务卡片 (合并重复样式)
   ============================================ */
.card-service {
  transition: all var(--transition-speed) ease-in-out;
}

.card-service:hover {
  transform: translateY(-10px);
}

/* 特定卡片高度调整 */
.card-service[data-index="2"]:hover,
.card-service[data-index="3"]:hover {
  height: 290px !important;
}

.card-service[data-index="2"] a {
  margin-top: 45px;
}

/* ============================================
   通用卡片样式
   ============================================ */
.card {
  transition: transform var(--transition-speed) ease-in-out;
}

.card:hover {
  transform: translateY(-10px);
}

/* ============================================
   图片懒加载优化
   ============================================ */
img[loading="lazy"] {
  opacity: 0;
  transition: opacity 0.3s;
}

img[loading="lazy"].loaded {
  opacity: 1;
}

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

/* ============================================
   响应式媒体查询
   ============================================ */

/* 大屏幕 (1440px以下) */
@media (max-width: 1440px) {
  .container {
    max-width: 1200px;
  }
}

/* 中等屏幕 (1024px以下) */
@media (max-width: 1024px) {
  .container {
    max-width: 960px;
  }
  
  .partner-cards {
    flex-direction: column;
    align-items: center;
  }
  
  .partner-cards > div {
    width: 100% !important;
    max-width: 432px;
    margin-bottom: 32px;
  }
  
  .service-cards {
    flex-direction: column;
    align-items: center;
  }
  
  .service-cards > div {
    width: 100% !important;
    max-width: 664px;
  }
}

/* 小屏幕 (768px以下) */
@media (max-width: 768px) {
  .container {
    max-width: 100%;
    padding: 0 16px;
  }
  
  /* 隐藏桌面导航,显示移动端菜单 */
  header nav {
    display: none;
  }
  
  .mobile-menu-btn {
    display: block;
  }
  
  /* 调整标题大小 */
  h1 {
    font-size: 32px !important;
  }
  
  h2 {
    font-size: 24px !important;
  }
  
  /* 卡片单列布局 */
  .product-cards {
    flex-direction: column;
    align-items: center;
  }
  
  .product-cards > div {
    width: 100% !important;
    max-width: 316px;
    margin-bottom: 24px;
  }
}

/* 超小屏幕 (480px以下) */
@media (max-width: 480px) {
  .container {
    padding: 0 12px;
  }
  
  h1 {
    font-size: 28px !important;
  }
  
  h2 {
    font-size: 20px !important;
  }
  
  .btn-primary {
    width: 100% !important;
  }
}

/* ============================================
   工具类
   ============================================ */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* 回到顶部按钮 */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary-green), var(--primary-blue));
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-speed);
  z-index: 1000;
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  transform: translateY(-5px);
  box-shadow: 0 6px 16px rgba(0,0,0,0.2);
}

/* ============================================
   表单改进样式
   ============================================ */
.form-group {
  position: relative;
  margin-bottom: 18px;
}

.form-error {
  color: #F33E3E;
  font-size: 12px;
  margin-top: 4px;
  display: none;
}

.form-error.show {
  display: block;
}

.form-input.error {
  border-color: #F33E3E;
}

.form-input.success {
  border-color: var(--primary-green);
}

/* ============================================
   移动端菜单
   ============================================ */
.mobile-menu-btn {
  display: none;
  flex-direction: column;
  justify-content: space-around;
  width: 30px;
  height: 25px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0;
  z-index: 300;
}

.mobile-menu-btn span {
  width: 30px;
  height: 3px;
  background: var(--text-dark);
  border-radius: 10px;
  transition: all 0.3s linear;
  position: relative;
  transform-origin: 1px;
}

.mobile-menu-btn.active span:first-child {
  transform: rotate(45deg);
}

.mobile-menu-btn.active span:nth-child(2) {
  opacity: 0;
  transform: translateX(20px);
}

.mobile-menu-btn.active span:nth-child(3) {
  transform: rotate(-45deg);
}

.mobile-nav {
  display: none;
  position: fixed;
  top: 78px;
  left: 0;
  right: 0;
  background: white;
  padding: 20px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
  z-index: 199;
}

.mobile-nav.active {
  display: block;
}

.mobile-nav a {
  display: block;
  padding: 12px 0;
  border-bottom: 1px solid var(--bg-light);
  color: var(--text-dark);
  text-decoration: none;
}

.mobile-nav a:hover {
  color: var(--primary-blue);
}