/*
 * 布局相关样式
 * 包含页面布局、网格系统、头部、侧边栏、主内容区域等
 * 整合了原来分散在多个文件中的布局样式
 */

/* 数据分析页面容器样式 */
.dynamic-section .container {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: 15px;
    padding: 30px;
    margin-top: 30px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.dynamic-section .container h1 {
    color: var(--text-primary);
    text-align: center;
    margin-bottom: 30px;
    background: linear-gradient(135deg, var(--neon-blue) 0%, var(--neon-purple) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.dynamic-section .container label {
    color: var(--text-primary);
    font-weight: 600;
    margin-top: 15px;
    display: block;
}

.dynamic-section .container input[type="text"],
.dynamic-section .container input[type="file"],
.dynamic-section .container input[type="date"],
.dynamic-section .container select {
    width: 100%;
    padding: 12px 15px;
    margin-top: 8px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(0, 212, 255, 0.3);
    border-radius: 8px;
    color: var(--text-primary);
    box-sizing: border-box;
    transition: all var(--transition-normal) ease;
}

/* 修复下拉菜单选项颜色问题 */
.dynamic-section .container select option {
    background-color: var(--deep-space-2);
    color: var(--text-primary);
    padding: 8px 12px;
}

.dynamic-section .container select option:hover,
.dynamic-section .container select option:focus {
    background-color: var(--deep-space-3);
    color: var(--neon-blue);
}

.dynamic-section .container input[type="text"]:focus,
.dynamic-section .container input[type="file"]:focus,
.dynamic-section .container input[type="date"]:focus,
.dynamic-section .container select:focus {
    outline: none;
    border-color: var(--neon-blue);
    box-shadow: 0 0 10px rgba(0, 212, 255, 0.3);
}

.dynamic-section .container button {
    background: linear-gradient(135deg, var(--neon-blue) 0%, var(--neon-purple) 100%);
    border: none;
    border-radius: 25px;
    padding: 12px 30px;
    color: var(--text-primary);
    font-weight: 600;
    font-size: 16px;
    cursor: pointer;
    transition: all var(--transition-normal) ease;
    margin-top: 30px;
    width: 100%;
}

.dynamic-section .container button:hover {
    box-shadow: 0 5px 15px rgba(0, 212, 255, 0.4);
}

.dynamic-section .container .date-container {
    display: flex;
    gap: 10px;
    align-items: center;
    margin-top: 8px;
}

.dynamic-section .container .date-container input {
    flex: 1;
}

.dynamic-section .container .date-container button {
    width: auto;
    margin-top: 0;
    padding: 12px 15px;
    background: var(--success-color);
}
.dynamic-section .container .date-container button:hover {
    background: #45a049;
}

.dynamic-section .container .help-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 18px;
    height: 18px;
    background: var(--neon-blue);
    color: var(--text-primary);
    border-radius: 50%;
    font-size: 12px;
    text-decoration: none;
    margin-left: 8px;
    transition: all var(--transition-normal) ease;
    cursor: pointer;
}

.dynamic-section .container .help-icon:hover {
    box-shadow: 0 4px 10px rgba(0, 212, 255, 0.3);
    transform: scale(1.1);
}

/* 加载指示器样式 */
.loading-indicator {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 15px;
    color: var(--neon-blue);
    font-size: 1.2em;
    padding: 40px 20px;
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: 15px;
    margin-top: 30px;
}

.loading-indicator i {
    font-size: 2em;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* 产品分析页面特殊样式 */
.dynamic-section .drop-area {
    border: 2px dashed rgba(0, 212, 255, 0.3);
    border-radius: 10px;
    padding: 30px;
    text-align: center;
    margin: 20px 0;
    transition: all 0.3s ease;
    background: rgba(255, 255, 255, 0.05);
    position: relative;
    cursor: pointer;
}

.dynamic-section .drop-area:hover,
.dynamic-section .drop-area.dragover {
    border-color: var(--neon-blue);
    background: rgba(0, 212, 255, 0.1);
}

.dynamic-section .drop-area.uploading {
    background: rgba(0, 255, 136, 0.1);
    border-color: var(--success-color);
}

.dynamic-section .drop-area h3 {
    color: var(--text-primary);
    margin-bottom: 10px;
}

.dynamic-section .drop-area p {
    margin: 10px 0;
    color: var(--text-secondary);
}

.dynamic-section .file-types {
    font-size: 0.9em;
    color: var(--text-muted);
    margin-top: 5px;
}

.dynamic-section .upload-hint {
    font-size: 0.85em;
    color: var(--text-muted);
    margin-top: 10px;
    font-style: italic;
}

.dynamic-section .file-list {
    margin-top: 20px;
}

.dynamic-section .file-item {
    padding: 12px;
    margin: 8px 0;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border: 1px solid rgba(0, 212, 255, 0.1);
    position: relative;
}

.dynamic-section .file-item.empty {
    background: rgba(255, 255, 255, 0.02);
    border: 1px dashed rgba(255, 255, 255, 0.1);
    color: var(--text-muted);
    font-style: italic;
}

.dynamic-section .file-item.uploaded {
    background: rgba(0, 255, 136, 0.1);
    border-left: 4px solid var(--success-color);
}

.dynamic-section .file-item.uploading {
    background: rgba(255, 170, 0, 0.1);
    border-left: 4px solid var(--warning-color);
}

.dynamic-section .file-item.error {
    background: rgba(255, 0, 110, 0.1);
    border-left: 4px solid var(--error-color);
}

.dynamic-section .file-item span:first-child {
    color: var(--text-primary);
}

.dynamic-section .upload-progress {
    font-size: 0.8em;
    color: var(--text-secondary);
}

.dynamic-section .file-item .remove-file {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    background: var(--error-color);
    color: white;
    border: none;
    border-radius: 50%;
    width: 24px;
    height: 24px;
    font-size: 14px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    z-index: 10;
    padding: 0;
    line-height: 1;
}

.dynamic-section .file-item .remove-file:hover {
    background: #cc0055;
    transform: translateY(-50%) scale(1.1);
}

.dynamic-section .hidden-inputs {
    display: none;
}

.dynamic-section .date-range-container {
    display: flex;
    gap: 10px;
    align-items: center;
    margin-top: 8px;
}

.dynamic-section .date-range-container input[type="date"] {
    flex: 1;
}

.dynamic-section .date-range-container span {
    color: var(--text-primary);
}

.dynamic-section #last-week-btn,
.dynamic-section #yesterday-btn {
    padding: 12px 15px;
    background: var(--success-color);
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1em;
    transition: all 0.3s ease;
    margin-top: 0;
    width: auto;
}

.dynamic-section #last-week-btn:hover,
.dynamic-section #yesterday-btn:hover {
    background: #45a049;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}


/* 应用容器 */
.app-container {
  display: flex;
  margin-top: 70px;
  min-height: calc(100vh - 70px);
}

/* 顶部标题栏 */
.cyber-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 70px;
  background: linear-gradient(90deg, var(--deep-space-1) 0%, var(--deep-space-2) 50%, var(--deep-space-3) 100%);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(0, 212, 255, 0.2);
  z-index: 1000;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 30px;
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.8);
}

.site-title {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 2px;
}

.site-title-link {
  color: inherit;
  text-decoration: none;
  background: linear-gradient(135deg, var(--neon-blue) 0%, var(--neon-purple) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  transition: all var(--transition-normal) ease;
}

.site-title-link:hover {
  filter: brightness(1.2);
}

/* 用户信息容器 */
.user-container {
  display: flex;
  align-items: center;
  gap: 15px;
}

/* 用户头像 */
.user-avatar {
  width: 35px;
  height: 35px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--neon-blue) 0%, var(--neon-purple) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  color: var(--text-primary);
  box-shadow: 0 0 10px rgba(0, 212, 255, 0.5);
  transition: transform var(--transition-normal) ease;
  cursor: pointer;
}

.user-avatar:hover {
  transform: rotate(360deg) scale(1.1);
}

.user-name {
  font-weight: 500;
  color: var(--text-primary);
  font-size: 14px;
}

.dropdown-arrow {
  font-size: 12px;
  color: var(--text-secondary);
  transition: transform var(--transition-normal) ease;
}
/* 用户下拉菜单容器 */
.user-dropdown {
  position: relative;
}

/* 用户信息区域 */
.user-info {
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(0, 212, 255, 0.3);
  border-radius: 30px;
  padding: 8px 20px;
  display: flex;
  align-items: center;
  gap: 12px;
  transition: all var(--transition-normal) ease;
  cursor: pointer;
}

.user-info:hover {
  border-color: var(--neon-blue);
  box-shadow: 0 0 15px rgba(0, 212, 255, 0.3);
}

/* 下拉菜单 */
.dropdown-menu {
  position: absolute;
  top: calc(100% + 10px);
  right: 0;
  background: rgba(26, 26, 46, 0.95);
  backdrop-filter: blur(15px);
  border: 1px solid rgba(0, 212, 255, 0.2);
  border-radius: 12px;
  min-width: 180px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all var(--transition-normal) ease;
  z-index: 1000;
  overflow: hidden;
}

.user-dropdown.active .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.user-dropdown.active .dropdown-arrow {
  transform: rotate(180deg);
}

/* 下拉菜单项 */
.dropdown-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  color: var(--text-primary);
  text-decoration: none;
  transition: all var(--transition-fast) ease;
  font-size: 14px;
  font-weight: 500;
}

.dropdown-item i {
  width: 16px;
  text-align: center;
  color: var(--text-secondary);
}

.dropdown-item:hover {
  background: rgba(0, 212, 255, 0.1);
  color: var(--neon-blue);
}

.dropdown-item:hover i {
  color: var(--neon-blue);
}

.dropdown-item.logout-item:hover {
  background: var(--error-hover-bg);
  color: var(--error-color);
  font-weight: 600;
  text-shadow: 0 0 3px rgba(255, 71, 87, 0.3);
}

.dropdown-item.logout-item:hover i {
  color: var(--error-color);
}

/* 下拉菜单分割线 */
.dropdown-divider {
  height: 1px;
  background: rgba(0, 212, 255, 0.2);
  margin: 4px 0;
}

/* 左侧边栏 */
.cyber-sidebar {
  width: 260px;
  background: linear-gradient(180deg, var(--deep-space-2) 0%, var(--deep-space-3) 100%);
  border-right: 1px solid rgba(0, 212, 255, 0.2);
  overflow-y: auto;
  position: fixed;
  top: 70px;
  left: 0;
  bottom: 0;
  z-index: 999;
}

.sidebar-menu {
  list-style: none;
  margin: 0;
  padding: 20px 0;
}

/* 菜单分组 */
.menu-group {
  margin-bottom: 15px;
}

.group-title {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 20px;
  font-weight: 600;
  font-size: 14px;
  color: var(--text-primary);
  background: rgba(0, 212, 255, 0.1);
  border-left: 3px solid var(--neon-blue);
  margin-bottom: 5px;
  text-transform: uppercase;
  letter-spacing: 1px;
  cursor: pointer;
  transition: all var(--transition-normal) ease;
  position: relative;
}

.group-title::after {
  content: '\f107';
  font-family: 'Font Awesome 5 Free';
  font-weight: 900;
  margin-left: auto;
  transition: transform var(--transition-normal) ease;
}

.group-title.expanded::after {
  transform: rotate(180deg);
}

.group-title:hover {
  background: rgba(0, 212, 255, 0.2);
  border-left-color: var(--neon-purple);
  color: var(--neon-blue);
}

.group-title.active {
  background: rgba(157, 78, 221, 0.15);
  border-left-color: var(--neon-purple);
  color: var(--neon-purple);
}

/* 子菜单 */
.submenu {
  list-style: none;
  margin: 0;
  padding: 0;
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-normal) ease;
}

.submenu.expanded {
  max-height: 500px;
}

/* 导航项 */
.nav-item {
  position: relative;
  transition: all var(--transition-normal) ease;
  font-weight: 500;
  font-size: 13px;
  display: block;
  border-left: 3px solid transparent;
}

.nav-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, rgba(0, 212, 255, 0.2) 0%, transparent 100%);
  transition: width var(--transition-normal) ease;
  z-index: 0;
}

.nav-item:hover {
  background: rgba(0, 212, 255, 0.1);
  border-left-color: var(--neon-blue);
}

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

.nav-item.active {
  background: rgba(157, 78, 221, 0.15);
  border-left-color: var(--neon-purple);
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  padding: 10px 20px 10px 35px;
  color: var(--text-primary);
  text-decoration: none;
  transition: all var(--transition-normal) ease;
  position: relative;
  z-index: 1;
}

.nav-item a:hover {
  color: var(--neon-blue);
}

.nav-item.active a {
  color: var(--neon-purple);
}

/* 主内容区域 */
.main-content {
  margin-left: 260px;
  padding: 30px;
  position: relative;
  flex: 1;
  width: calc(100% - 260px);
}

/* 内容区域 */
.content-area {
  flex: 1;
  padding: 20px;
  overflow-y: auto;
  max-width: 1400px;
  margin: 0 auto;
  padding-left: 5%;
  padding-right: 5%;
  margin-top: 140px;
  position: relative;
}

.left-content {
  width: 100%;
}

/* 分类侧边栏 */
.category-sidebar {
  position: fixed;
  top: 40px;
  left: 0;
  right: 0;
  width: 100%;
  display: flex;
  justify-content: center;
  background-color: transparent;
  padding: 10px 0;
  z-index: 999;
}

.category-list {
  list-style-type: none;
  padding: 10px 5%;
  margin: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  max-width: 900px;
  width: 95%;
  background: linear-gradient(135deg, rgba(245, 247, 250, 0.9) 0%, rgba(195, 207, 226, 0.9) 100%);
  backdrop-filter: blur(10px);
  border-radius: 30px;
  box-shadow: 
      0 8px 32px rgba(31, 38, 135, 0.2),
      0 1px 2px rgba(0, 0, 0, 0.1),
      0 0 0 1px rgba(255, 255, 255, 0.2) inset;
  transition: all var(--transition-duration) ease;
}

.category-item {
  padding: 10px 20px;
  margin: 0 5px;
  cursor: pointer;
  transition: all var(--transition-duration) ease;
  font-size: 16px;
  font-weight: 600;
  text-align: center;
  border-radius: 25px;
  color: #333;
  position: relative;
  overflow: hidden;
  z-index: 1;
}

.category-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--primary-gradient);
  z-index: -1;
  transform: translateY(100%);
  transition: transform var(--transition-duration) ease;
}

.category-item:hover {
  color: white;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.category-item:hover::before {
  transform: translateY(0);
}

.category-item.active {
  color: white;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.category-item.active::before {
  transform: translateY(0);
}

/* 网格系统 */
.grid {
  display: grid;
  gap: 20px;
}

.grid-2 {
  grid-template-columns: repeat(2, 1fr);
}

.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid-4 {
  grid-template-columns: repeat(4, 1fr);
}

.grid-auto {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

/* 子分类网格 */
.subcategory-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  padding: 30px 20px;
  display: none;
  opacity: 0;
  transform: translateY(20px);
  transition: all var(--transition-duration) ease;
}

.subcategory-grid.active {
  display: grid;
  opacity: 1;
  transform: translateY(0);
}

.subcategory-card {
  background: var(--card-gradient);
  border-radius: 16px;
  padding: 30px;
  text-align: center;
  transition: all var(--transition-duration) ease;
  min-height: 220px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  align-content: center;
  box-shadow:
    0 10px 20px rgba(0, 0, 0, 0.1),
    0 6px 6px rgba(0, 0, 0, 0.1);
  text-decoration: none;
  color: inherit;
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.5);
  backdrop-filter: blur(10px);
}

.subcategory-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(45deg, rgba(255,255,255,0.1), rgba(255,255,255,0.3));
  z-index: 0;
  pointer-events: none;
}

.subcategory-card:hover {
  box-shadow:
    0 20px 40px rgba(0, 0, 0, 0.2),
    0 10px 15px rgba(0, 0, 0, 0.15);
  background: linear-gradient(135deg, #ffffff 0%, #e6e9f0 100%);
}

.subcategory-card i {
  font-size: 3.5em;
  margin-bottom: 20px;
  color: var(--tools-color);
  transition: all var(--transition-duration) ease;
  position: relative;
  z-index: 1;
}

.subcategory-card[data-category="data-analysis"] i {
  color: #003366;
}

.subcategory-card[data-category="templates"] i {
  color: #9b59b6;
}

.subcategory-card h3 {
  margin: 0 0 15px 0;
  font-size: 1.6em;
  color: #2c3e50;
  position: relative;
  z-index: 1;
}

.subcategory-card p {
  font-size: 1em;
  color: #7f8c8d;
  margin: 0;
  line-height: 1.6;
  position: relative;
  z-index: 1;
}

/* 内容卡片网格 */
.content-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 25px;
  margin-top: 30px;
}

/* 欢迎卡片 */
.welcome-card {
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(0, 212, 255, 0.2);
  border-radius: 15px;
  padding: 40px;
  text-align: center;
  transition: all var(--transition-normal) ease;
  position: relative;
  overflow: hidden;
  margin-top: 30px;
}

.welcome-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.1) 0%, rgba(157, 78, 221, 0.1) 100%);
  opacity: 0;
  transition: opacity var(--transition-normal) ease;
}

.welcome-card:hover {
  border-color: var(--neon-blue);
  box-shadow: 0 10px 30px rgba(0, 212, 255, 0.3);
}

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

.welcome-card i {
  font-size: 4em;
  margin-bottom: 20px;
  background: linear-gradient(135deg, var(--neon-blue) 0%, var(--neon-purple) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.welcome-card h2 {
  margin: 0 0 15px 0;
  font-size: 2em;
  font-weight: 700;
  color: var(--text-primary);
}

.welcome-card p {
  margin: 0;
  font-size: 1.1em;
  color: var(--text-secondary);
}

/* 页面底部 */
.page-footer {
  background-color: transparent;
  padding: 20px 0;
  text-align: center;
  border-top: 1px solid #e7e7e7;
  margin-top: 20px;
}

.page-footer .copyright {
  margin: 0;
  font-size: 14px;
  color: #6c757d;
}

/* 菜单切换按钮 */
.menu-toggle {
  display: none;
  position: fixed;
  top: 15px;
  left: 15px;
  z-index: 1001;
  background: rgba(0, 212, 255, 0.2);
  border: 1px solid var(--neon-blue);
  border-radius: 5px;
  padding: 8px;
  cursor: pointer;
  color: var(--neon-blue);
}

/* 默认内容区域 */
.default-section {
  display: none;
  opacity: 0;
  transform: translateY(20px);
  transition: all var(--transition-normal) ease;
}

.default-section.active {
  display: block;
  opacity: 1;
  transform: translateY(0);
}

/* 动态内容区域 */
.dynamic-section {
  display: none;
  opacity: 0;
  transform: translateY(20px);
  transition: all var(--transition-normal) ease;
  width: 100%;
}

.dynamic-section.active {
  display: block;
  opacity: 1;
  transform: translateY(0);
}

/* 空首页布局 */
.empty-homepage {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 70vh;
  text-align: center;
  padding: 20px;
}

/* 欢迎容器 */
.welcome-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  max-width: 800px;
  animation: fadeInUp 1s ease-in-out;
}

.welcome-visual {
  position: relative;
  margin-bottom: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.welcome-icon {
  width: 120px;
  height: 120px;
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.2), rgba(157, 78, 221, 0.2));
  border: 2px solid rgba(0, 212, 255, 0.3);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  z-index: 2;
  animation: pulse 2s infinite ease-in-out;
  box-shadow: 0 0 30px rgba(0, 212, 255, 0.3);
}

.welcome-icon i {
  font-size: 3.5rem;
  background: linear-gradient(135deg, var(--neon-blue) 0%, var(--neon-purple) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.welcome-particles {
  position: absolute;
  width: 200px;
  height: 200px;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 1;
}

.particle {
  position: absolute;
  width: 8px;
  height: 8px;
  background: var(--neon-blue);
  border-radius: 50%;
  opacity: 0.7;
  animation: float 4s infinite ease-in-out;
}

.particle:nth-child(1) {
  top: 20%;
  left: 20%;
  animation-delay: 0s;
  background: var(--neon-blue);
}

.particle:nth-child(2) {
  top: 20%;
  right: 20%;
  animation-delay: 1s;
  background: var(--neon-purple);
}

.particle:nth-child(3) {
  bottom: 20%;
  left: 20%;
  animation-delay: 2s;
  background: var(--neon-cyan);
}

.particle:nth-child(4) {
  bottom: 20%;
  right: 20%;
  animation-delay: 3s;
  background: var(--neon-pink);
}

.particle:nth-child(5) {
  top: 50%;
  left: 10%;
  animation-delay: 1.5s;
  background: var(--neon-blue);
}

.welcome-content {
  text-align: center;
}

.welcome-greeting h2 {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 10px;
  text-shadow: 0 0 20px rgba(0, 212, 255, 0.3);
  animation: glow 2s infinite alternate;
}

.welcome-title h3 {
  font-size: 2rem;
  font-weight: 600;
  background: linear-gradient(135deg, var(--neon-blue) 0%, var(--neon-purple) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 20px;
}

.welcome-description p {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 10px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.welcome-hint {
  font-size: 0.95rem !important;
  color: var(--text-muted) !important;
  margin-top: 15px !important;
  font-style: italic;
}

.welcome-features {
  display: flex;
  justify-content: center;
  gap: 30px;
  margin-top: 40px;
  flex-wrap: wrap;
}

.feature-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 15px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(0, 212, 255, 0.2);
  border-radius: 12px;
  min-width: 100px;
  transition: all var(--transition-normal) ease;
}

.feature-item:hover {
  border-color: var(--neon-blue);
  box-shadow: 0 10px 20px rgba(0, 212, 255, 0.2);
  background: rgba(0, 212, 255, 0.1);
}

.feature-item i {
  font-size: 1.5rem;
  color: var(--neon-blue);
}

.feature-item span {
  font-size: 0.9rem;
  color: var(--text-primary);
  font-weight: 500;
}

/* 动画效果 */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes float {
  0% {
    transform: translateY(0) rotate(0deg);
    opacity: 0.7;
  }
  50% {
    transform: translateY(-20px) rotate(180deg);
    opacity: 1;
  }
  100% {
    transform: translateY(0) rotate(360deg);
    opacity: 0.7;
  }
}

@keyframes glow {
  from {
    text-shadow: 0 0 20px rgba(0, 212, 255, 0.3);
  }
  to {
    text-shadow: 0 0 30px rgba(0, 212, 255, 0.6), 0 0 40px rgba(0, 212, 255, 0.4);
  }
}