/* ========== 耀帧平台 - 全局基础样式 | 响应式通用类 ========== */

/* 1. 重置与基础设置 */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px; /* 桌面基准 */
  scroll-behavior: smooth; /* 原生平滑滚动备用 */
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  background-color: #0c0c14;
  color: #e0e0e0;
  line-height: 1.6;
  overflow-x: hidden; /* 禁止横向滚动条 */
  min-width: 320px;
}

/* 响应式根字体大小 */
@media (min-width: 768px) and (max-width: 1199px) {
  html { font-size: 15px; }
}

@media (max-width: 767px) {
  html { font-size: 14px; }
}

/* 链接默认样式 */
a {
  color: inherit;
  text-decoration: none;
}

ul, ol {
  list-style: none;
}

/* 图片占位等 */
img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* 2. 工具类 */
.container {
  width: 100%;
  max-width: 1400px;
  margin: 0 auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

@media (max-width: 767px) {
  .container {
    padding-left: 1rem;
    padding-right: 1rem;
  }
}

.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

/* 3. 网格背景组件 */
.grid-bg {
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 3rem 3rem;
  background-position: center center;
}

/* 4. 毛玻璃效果 */
.glass-effect {
  background: rgba(10, 10, 20, 0.75);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

/* 5. 导航通用样式 */
/* 桌面端顶部导航 */
.desktop-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4rem;
  padding: 0 2rem;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  transition: background 0.3s, box-shadow 0.3s;
}

.desktop-nav .nav-logo {
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: 1px;
  color: #ffffff;
}

.desktop-nav .nav-menu {
  display: flex;
  gap: 2.5rem;
}

.desktop-nav .nav-menu a {
  position: relative;
  padding: 0.5rem 0;
  font-size: 1rem;
  font-weight: 500;
  color: #c0c0d0;
  transition: color 0.2s;
}

.desktop-nav .nav-menu a.active,
.desktop-nav .nav-menu a:hover {
  color: #ffffff;
}

.desktop-nav .nav-menu a.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, #4facfe, #00f2fe);
}

.desktop-nav .user-area {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.desktop-nav .user-avatar {
  width: 2.2rem;
  height: 2.2rem;
  border-radius: 50%;
  background: #2a2a3a;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  font-weight: 600;
  color: #fff;
  overflow: hidden;
}

.desktop-nav .login-btn {
  padding: 0.5rem 1.5rem;
  border-radius: 2rem;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: #fff;
  font-size: 0.9rem;
  cursor: pointer;
  transition: background 0.3s;
}

.desktop-nav .login-btn:hover {
  background: rgba(255, 255, 255, 0.2);
}

/* 滚动后阴影 */
.desktop-nav.scrolled {
  background: rgba(10, 10, 20, 0.9);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
}

/* 移动端底部Tab */
.mobile-bottom-tab {
  display: none; /* 默认隐藏，移动端显示 */
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3.5rem;
  background: rgba(10, 10, 20, 0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  z-index: 999;
  justify-content: space-around;
  align-items: center;
}

.mobile-bottom-tab .tab-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  flex: 1;
  height: 100%;
  color: #888;
  font-size: 0.7rem;
  cursor: pointer;
  transition: color 0.2s;
}

.mobile-bottom-tab .tab-item.active {
  color: #4facfe;
}

.mobile-bottom-tab .tab-item svg {
  width: 1.4rem;
  height: 1.4rem;
  fill: currentColor;
  margin-bottom: 0.2rem;
}

@media (max-width: 767px) {
  .desktop-nav .nav-menu {
    display: none; /* 移动端隐藏顶部菜单 */
  }
  .mobile-bottom-tab {
    display: flex;
  }
}

/* 移动端顶部简化导航 */
@media (max-width: 767px) {
  .desktop-nav {
    justify-content: space-between;
    padding: 0 1rem;
    height: 3.2rem;
  }
  .desktop-nav .nav-logo { font-size: 1.3rem; }
  .desktop-nav .user-area { margin-left: auto; }
}

/* 6. 按钮通用样式 */
.btn {
  display: inline-block;
  padding: 0.8rem 2rem;
  border-radius: 2.5rem;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: transform 0.2s, box-shadow 0.3s, background 0.3s;
  outline: none;
}

.btn-primary {
  background: linear-gradient(135deg, #4facfe, #00f2fe);
  color: #0a0a14;
}

.btn-ghost {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.3);
  color: #fff;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
}

.btn:active {
  transform: translateY(0);
  opacity: 0.8;
}

/* 移动端按钮尺寸 */
@media (max-width: 767px) {
  .btn {
    padding: 0.7rem 1.5rem;
    font-size: 0.95rem;
  }
  /* 移动端可点击元素最小尺寸44px */
  .btn, .desktop-nav .login-btn, .tab-item {
    min-height: 44px;
    min-width: 44px;
  }
}

/* 7. 动画元素隐藏（移动端降级） */
.mouse-glow {
  transition: opacity 0.3s;
}
/* 通过 JS 控制显示/隐藏，这里预留样式 */

/* 8. 辅助类 */
.text-gradient {
  background: linear-gradient(135deg, #4facfe, #00f2fe);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* 角色控制显隐（通过 CSS 属性选择器） */
html[data-role="customer"] [data-role="technician"],
html[data-role="technician"] [data-role="customer"] {
  display: none !important;
}

/* 默认双方都不隐藏，由 JS 设置 html 属性后生效 */