/* 全局 Header 样式 */
.global-header {
    background: var(--color-bg-primary);
    border-bottom: 1px solid var(--color-border);
    position: relative;
    z-index: 1000;
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

.header-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

/* Logo 区域 */
.header-logo {
    font-size: 20px;
    font-weight: 700;
    color: var(--color-accent);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: opacity 0.2s;
}

.header-logo:hover {
    opacity: 0.8;
}

.header-logo .brand-logo {
    width: 30px;
    height: 30px;
    object-fit: contain;
    background: #FFFFFF;
    border-radius: 7px;
    flex-shrink: 0;
}

/* 首页 Header 的品牌标识更醒目，并与 64px 导航栏垂直居中。 */
.home-header-logo {
    margin-left: 4px;
}

.home-header-logo .brand-logo {
    width: 40px;
    height: 40px;
    padding: 2px;
    border-radius: 10px;
    object-position: center;
}

/* 中间导航区域 */
.header-nav {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 4px;
}

.nav-link {
    padding: 8px 18px;
    color: var(--color-text-primary);
    text-decoration: none;
    font-weight: 500;
    border-radius: 8px;
    transition: color 0.2s, background-color 0.2s;
    position: relative;
}

.nav-link:hover {
    background: var(--color-bg-secondary);
    color: var(--color-accent);
}

.nav-link.active {
    color: var(--color-accent);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 20px;
    right: 20px;
    height: 2px;
    background: var(--color-accent);
    border-radius: 2px;
}

/* 右侧操作区域 */
.header-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

/* 主题切换按钮 */
.theme-toggle {
    width: 40px;
    height: 40px;
    flex-shrink: 0;
    border-radius: 10px;
    border: 1px solid var(--color-border);
    background: var(--color-bg-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.2s, border-color 0.2s, color 0.2s, transform 0.2s;
    color: var(--color-text-primary);
}

.theme-toggle:hover {
    background: var(--color-bg-secondary);
    border-color: var(--color-accent);
    color: var(--color-accent);
    transform: translateY(-1px);
}

.theme-toggle:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

.theme-toggle .theme-icon {
    width: 20px;
    height: 20px;
}

/* 用户信息区域 */
.user-menu {
    position: relative;
}

.user-trigger {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 6px 10px;
    border-radius: 10px;
    border: 1px solid transparent;
    background: transparent;
    cursor: pointer;
    transition: background-color 0.2s, border-color 0.2s;
}

.user-trigger:hover,
.user-menu.active .user-trigger {
    background: var(--color-bg-secondary);
    border-color: var(--color-border);
}

.user-avatar {
    width: 34px;
    height: 34px;
    flex-shrink: 0;
    border-radius: 50%;
    background: var(--color-accent);
    border: 1px solid rgba(255, 255, 255, 0.22);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
    font-size: 15px;
    line-height: 1;
    text-transform: uppercase;
    user-select: none;
}

.user-name {
    font-weight: 500;
    color: var(--color-text-primary);
    max-width: 120px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.user-chevron {
    width: 16px;
    height: 16px;
    color: var(--color-text-secondary);
    transition: transform 0.2s;
}

.user-menu.active .user-chevron {
    transform: rotate(180deg);
}

/* 用户信息下拉菜单 */
.user-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    min-width: 240px;
    background: var(--color-bg-primary);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity 0.2s, visibility 0.2s, transform 0.2s, background-color 0.3s;
    z-index: 1001;
}

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

.user-dropdown-header {
    padding: 16px;
}

.user-dropdown-info {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.user-info-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 13px;
}

.user-info-label {
    color: var(--color-text-secondary);
}

.user-info-value {
    color: var(--color-text-primary);
    font-weight: 500;
}

.user-balance {
    font-size: 18px;
    font-weight: 700;
    color: var(--color-accent);
}

/* 用户菜单内现有充值按钮 */
.user-dropdown-info > button {
    min-height: 38px;
    background: var(--color-accent) !important;
    border-radius: 8px !important;
    box-shadow: 0 4px 12px rgba(56, 189, 248, 0.18);
}

.user-dropdown-info > button:hover {
    background: var(--color-accent-hover) !important;
    transform: translateY(-1px);
    box-shadow: 0 6px 16px rgba(56, 189, 248, 0.28);
}

.user-dropdown-info > button:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

.user-dropdown-menu {
    padding: 8px;
    border-top: 1px solid var(--color-border);
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s;
    color: var(--color-text-primary);
    text-decoration: none;
    font-size: 14px;
}

.dropdown-item:hover {
    background: var(--color-bg-secondary);
    color: var(--color-accent);
}

.dropdown-item svg {
    width: 18px;
    height: 18px;
    color: var(--color-text-secondary);
    flex-shrink: 0;
}

.dropdown-item:hover svg {
    color: var(--color-accent);
}

.dropdown-menu-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
    color: var(--color-text-primary);
    text-decoration: none;
}

.dropdown-menu-item:hover {
    background: var(--color-bg-secondary);
}

.dropdown-menu-item svg {
    width: 20px;
    height: 20px;
    color: var(--color-text-secondary);
}

.dropdown-menu-divider {
    height: 1px;
    background: var(--color-border);
    margin: 8px 0;
}

/* 登录/注册按钮 */
.auth-buttons {
    display: flex;
    gap: 12px;
}

.btn-ghost {
    padding: 8px 20px;
    border: 1px solid var(--color-border);
    background: transparent;
    color: var(--color-text-primary);
    border-radius: 8px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-ghost:hover {
    background: var(--color-bg-secondary);
    border-color: var(--color-accent);
    color: var(--color-accent);
}

.btn-primary {
    padding: 8px 20px;
    border: none;
    background: var(--color-accent);
    color: white;
    border-radius: 8px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-primary:hover {
    opacity: 0.9;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(79, 209, 197, 0.3);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .header-container {
        padding: 0 16px;
    }
    
    .user-name {
        display: none;
    }
    
    .user-dropdown {
        min-width: 260px;
        right: -16px;
    }
}