/* ===== 全局重置和基础样式 ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  line-height: 1.6;
  color: #333;
  scroll-behavior: smooth;
  /* 防止移动端横向滚动 */
  overflow-x: hidden;
}

/* ===== CSS自定义属性 ===== */
:root {
  --header-height: 70px;
  --primary-color: #EB6630;
  --primary-dark: #D45520;
  --text-color: #333;
  --bg-color: #fff;
  --shadow-light: 0 2px 15px rgba(235, 102, 48, 0.15);
  --shadow-medium: 0 4px 20px rgba(235, 102, 48, 0.3);
  --shadow-heavy: 0 10px 30px rgba(0,0,0,0.3);
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --border-radius: 8px;
  --mobile-breakpoint: 768px;
  --phone-breakpoint: 480px;
  /* 用于解决移动端100vh问题 */
  --vh: 1vh;
}

/* ===== 导航栏样式 ===== */
.header {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
  position: fixed;
  width: 100%;
  top: 0;
  z-index: 1000;
  box-shadow: var(--shadow-medium);
  backdrop-filter: blur(10px);
  transition: all var(--transition-slow);
}

.header.scrolled {
  background: rgba(235, 102, 48, 0.95);
  box-shadow: 0 2px 15px rgba(235, 102, 48, 0.4);
}

.nav {
  max-width: 1680px;
  font-size: 18px;
  margin: 0 auto;
  padding: 15px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: relative;
  min-height: var(--header-height);
}

.logo {
  font-size: 24px;
  font-weight: bold;
  color: #FFF;
  text-decoration: none;
  flex-shrink: 0;
}

.nav-links {
  display: flex;
  gap: 40px;
  flex: 1;
  margin: 0 40px;
  list-style: none;
  align-items: center;
  justify-content: center;
}

.phone-text {
  color: #fff;
  font-size: 16px;
  font-weight: 500;
  white-space: nowrap;
  flex-shrink: 0;
  text-shadow: 0 1px 2px rgba(0,0,0,0.1);
}

.nav-links a {
  text-decoration: none;
  color: #fff;
  position: relative;
  padding: 8px 0;
  font-weight: 500;
  transition: all var(--transition-slow);
  display: flex;
  align-items: center;
}

.nav-links a::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: white;
  transition: all var(--transition-normal);
  transform: translateX(-50%);
}

.nav-links a:hover::before {
  width: 100%;
}

.nav-links a:hover {
  color: #EDEDED;
  transform: translateY(-2px);
}

/* ===== 下拉菜单样式（仅PC端） ===== */
.dropdown {
  position: relative;
}

.dropdown-content {
  display: none;
  position: absolute;
  background: var(--bg-color);
  min-width: 200px;
  box-shadow: var(--shadow-light);
  z-index: 1001;
  top: 100%;
  left: 0;
  border-radius: var(--border-radius);
  overflow: hidden;
  opacity: 0;
  transform: translateY(-10px);
  transition: all var(--transition-slow);
}

/* 仅在非移动端启用hover效果 */
@media (hover: hover) and (pointer: fine) {
  .dropdown:hover .dropdown-content {
    display: block;
    opacity: 1;
    transform: translateY(0);
  }
}

.dropdown-content a {
  color: var(--text-color) !important;
  padding: 15px 20px;
  text-decoration: none;
  display: block;
  transition: all var(--transition-normal);
  border-bottom: 1px solid #f0f0f0;
}

.dropdown-content a:last-child {
  border-bottom: none;
}

.dropdown-content a:hover {
  color: var(--primary-color) !important;
  background: linear-gradient(135deg, #f8f9fa, #e9ecef);
  transform: translateX(5px);
}

/* ===== 汉堡菜单样式 ===== */
.mobile-menu {
  display: none;
  width: 30px;
  height: 20px;
  position: relative;
  cursor: pointer;
  z-index: 1200;
  transition: all var(--transition-normal);
  flex-shrink: 0;
}

.mobile-menu span {
  position: absolute;
  height: 3px;
  width: 100%;
  background: #fff;
  transition: all var(--transition-slow);
  border-radius: 2px;
}

.mobile-menu span:nth-child(1) { top: 0; }
.mobile-menu span:nth-child(2) { top: 8px; }
.mobile-menu span:nth-child(3) { top: 16px; }

.mobile-menu.active span:nth-child(1) {
  transform: rotate(45deg);
  top: 8px;
}

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

.mobile-menu.active span:nth-child(3) {
  transform: rotate(-45deg);
  top: 8px;
}

/* ===== 页脚样式 ===== */
.footer {
  background: #111827;
  color: #fff;
  padding: 50px 0;
}

.footer-container {
  max-width: 1680px;
  margin: 0 auto;
  padding: 20px 10px;
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 80px;
}

.footer-left {
  margin: 20px 30px 20px 0;
}

.footer-links {
  padding-top: 30px;
}

.footer-links h3 {
  margin-bottom: 20px;
}

.footer-links a {
  color: #fff;
  text-decoration: none;
  display: block;
  margin-bottom: 10px;
  transition: color var(--transition-normal);
}

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

.footer-c {
  max-width: 1680px;
  margin: 0 auto; /* 水平居中 */
  border-top: 1px solid #1f2937;
  text-align: center;
  padding: 40px 20px 0; /* 上内边距40px，左右内边距20px */
  margin-bottom: 5px;
  color: #9ca3af;
  font-size: 18px;
}

/* ===== 滚动条美化 ===== */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
  background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(135deg, var(--primary-dark), #B8441A);
}

/* ===== 通用动画类 ===== */
.fade-in {
  animation: fadeIn 0.6s ease-out;
}

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

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

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

/* ===== 加载状态 ===== */
.loading {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 2px solid rgba(235, 102, 48, 0.3);
  border-radius: 50%;
  border-top-color: var(--primary-color);
  animation: spin 1s ease-in-out infinite;
}

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

/* ===== 移动端优化 ===== */
@media (max-width: 768px) {
  :root {
    --header-height: 60px;
  }

  /* 移动端触摸优化 */
  * {
    -webkit-tap-highlight-color: transparent !important;
  }

  /* 显示汉堡菜单 */
  .mobile-menu {
    display: block !important;
  }
  
  /* 隐藏电话文字 */
  .phone-text {
    display: none !important;
  }
  
  /* 移动端导航菜单 */
  .nav-links {
    display: none !important;
    position: fixed !important;
    top: var(--header-height) !important;
    left: 0 !important;
    right: 0 !important;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark)) !important;
    flex-direction: column !important;
    padding: 20px !important;
    gap: 15px !important;
    z-index: 1100 !important;
    box-shadow: var(--shadow-heavy) !important;
    max-height: calc(100vh - var(--header-height)) !important;
    max-height: calc(var(--vh, 1vh) * 100 - var(--header-height)) !important;
    overflow-y: auto !important;
    margin: 0 !important;
    justify-content: flex-start !important;
  }
  
  .nav-links.mobile-active {
    display: flex !important;
  }
  
  .nav-links li {
    width: 100% !important;
  }
  
  .nav-links a {
    display: block !important;
    padding: 12px 15px !important;
    border-radius: var(--border-radius) !important;
    color: white !important;
    transform: none !important;
  }
  
  .nav-links a:hover {
    background: rgba(255,255,255,0.1) !important;
    transform: none !important;
  }
  
  .nav-links a::before {
    display: none !important;
  }
  
  /* 移动端下拉菜单 */
  .dropdown-content {
    position: static !important;
    background: rgba(255,255,255,0.1) !important;
    box-shadow: none !important;
    display: none !important;
    margin-top: 10px !important;
    border-radius: var(--border-radius) !important;
    opacity: 1 !important;
    transform: translateY(0) !important;
    transition: none !important;
    min-width: auto !important;
  }
  
  .dropdown.mobile-active .dropdown-content {
    display: block !important;
  }
  
  .dropdown-content a {
    color: rgba(255,255,255,0.9) !important;
    padding: 10px 15px !important;
    font-size: 14px !important;
    border-bottom: 1px solid rgba(255,255,255,0.1) !important;
    border-radius: 4px !important;
    margin-bottom: 2px !important;
    transform: none !important;
    transition: background-color var(--transition-fast) !important;
  }
  
  .dropdown-content a:hover {
    background: rgba(255,255,255,0.2) !important;
    transform: none !important;
  }
  
  .dropdown-content a:last-child {
    border-bottom: none !important;
    margin-bottom: 0 !important;
  }
  
  .dropdown > a::after {
    content: ' ▼' !important;
    font-size: 10px !important;
    margin-left: 8px !important;
  }
  
  .dropdown.mobile-active > a::after {
    content: ' ▲' !important;
  }

  /* 移动端布局调整 */
  .banner {
    height: 60vh !important;
    margin-top: var(--header-height) !important;
  }

  .banner-slide img {
    height: 100% !important;
  }

  .banner-prev, .banner-next {
    padding: 8px 12px !important;
    font-size: 14px !important;
  }

  /* 移动端网格布局 */
  .stats {
    flex-direction: column !important;
    gap: 20px !important;
  }

  .stat-item {
    flex: 100% !important;
  }

  .store-images,
  .team-grid {
    grid-template-columns: 1fr !important;
    gap: 20px !important;
  }

  /* 移动端页脚 */
  .footer-left img {
    max-width: 300px !important;
    height: auto !important;
  }

  .footer-links {
    display: none !important;
  }

  .footer-container {
    grid-template-columns: 1fr !important;
    text-align: center;
  }

  .footer-left {
    margin: 10px 0;
    display: flex;
    flex-direction: column;
    align-items: center;
  }

  .footer-left > div {
    margin: 10px 0;
  }
}

/* ===== 小屏幕手机优化 ===== */
@media (max-width: 480px) {
  :root {
    --header-height: 50px;
  }

  .nav {
    padding: 10px 15px;
  }

  .logo {
    font-size: 18px;
  }

  .banner {
    height: 50vh !important;
    margin-top: var(--header-height) !important;
  }

  .banner-slide img {
    object-position: center !important;
  }

  .banner-prev,
  .banner-next {
    padding: 6px 10px !important;
    font-size: 12px !important;
  }

  .stat-number {
    font-size: 28px !important;
  }

  .footer-container {
    gap: 25px !important;
  }

  .footer-c {
    font-size: 14px;
    padding: 20px 15px 0;
    margin: 0 auto; /* 移动端也保持居中 */
  }
  
  .nav-links {
    top: var(--header-height) !important;
    padding: 15px !important;
  }
}