/* 確保風格分類每行只有一個，並移除數量限制 */
/* 風格分類懸停效果 - 現代化設計 */
.nav-category-sublink {
    position: relative;
    transition: all 0.3s ease;
    padding-left: 0 !important;
    overflow: visible !important;
}

.nav-category-sublink:hover {
    color: var(--text-light) !important;
    transform: translateX(8px);
    padding-left: 0 !important;
}

.nav-category-sublink:before {
    content: '';
    position: absolute;
    left: -15px;
    top: 50%;
    transform: translateY(-50%);
    width: 0;
    height: 0;
    opacity: 0;
    background-color: var(--primary);
    border-radius: 50%;
    transition: all 0.3s ease;
}

.nav-category-sublink:hover:before {
    width: 6px;
    height: 6px;
    opacity: 1;
    left: -12px;
}

/* 活躍風格的樣式 */
.nav-category-sublink.active-style {
    color: var(--text-light) !important;
    transform: translateX(8px);
    font-weight: 500;
}

/* 點擊波紋效果 */
.nav-ripple-effect {
    position: absolute;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.4);
    width: 10px;
    height: 10px;
    animation: ripple 0.6s linear;
    transform: scale(0);
    pointer-events: none;
    z-index: 1;
}

@keyframes ripple {
    to {
        transform: scale(20);
        opacity: 0;
    }
}

/* 活躍風格的指示器 */
.active-style-indicator {
    position: absolute;
    left: -12px;
    top: 50%;
    transform: translateY(-50%);
    width: 6px;
    height: 6px;
    background-color: var(--primary);
    border-radius: 50%;
    display: block;
    box-shadow: 0 0 8px rgba(170, 60, 255, 0.6);
    animation: pulseIndicator 2s infinite;
}

@keyframes pulseIndicator {
    0% {
        box-shadow: 0 0 0 0 rgba(170, 60, 255, 0.6);
        transform: translateY(-50%) scale(1);
    }
    70% {
        box-shadow: 0 0 0 6px rgba(170, 60, 255, 0);
        transform: translateY(-50%) scale(1.1);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(170, 60, 255, 0);
        transform: translateY(-50%) scale(1);
    }
}

/* 添加滑入動畫 */
.nav-category-items .nav-category-sublink {
    opacity: 0;
    transform: translateX(-10px);
    animation: slideInStyle 0.3s forwards;
    animation-delay: calc(0.05s * var(--item-index, 0));
}



@keyframes slideInStyle {
    to {
        opacity: 1;
        transform: translateX(0);
    }
}
.nav-category-items {
    flex: 1;
    min-height: 0;
    position: relative;
    padding: 0.4rem 0.5rem;
    width: 100%; /* 確保寬度為100% */
    display: flex; /* 使用flex佈局 */
    flex-direction: column; /* 垂直排列 */
    flex-wrap: nowrap; /* 不換行 */
    max-height: none !important; /* 移除高度限制 */
    border-radius: 8px;
    transition: background-color 0.3s ease;
}

.nav-category-group:hover .nav-category-items {
    background-color: rgba(255, 255, 255, 0.03);
}

.nav-category-sublink {
    color: var(--text-muted);
    font-size: 0.92rem;
    text-decoration: none;
    padding: 0.35rem 0;
    transition: color var(--transition-fast);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    position: relative;
    font-weight: 400;
    letter-spacing: 0.4px;
    line-height: 1.4;
    display: block !important; /* 強制設為 block，確保每行只有一個 */
    font-family: "Microsoft YaHei", "微软雅黑", "PingFang SC", "Hiragino Sans GB", sans-serif;
    margin-bottom: 0.5rem; /* 添加底部間距 */
    width: 100% !important; /* 強制寬度為100% */
    box-sizing: border-box; /* 確保寬度計算包含內邊距 */
    float: none !important; /* 禁止浮動 */
}

.nav-category-sublink:after {
    content: '' !important;
    position: absolute !important;
    left: 0 !important;
    bottom: -2px !important;
    width: 0 !important; /* 預設為 0，懸停時將擴展到 100% */
    height: 2px !important;
    background-color: var(--primary) !important;
    transition: width var(--transition-fast) !important;
    display: block !important;
    opacity: 1 !important;
    visibility: visible !important;
    transform: none !important;
}

.nav-category-sublink:hover {
    color: var(--text-light);
    text-decoration: none;
}

.nav-category-sublink:hover:after {
    width: 100% !important; /* 懸停時展開到全寬 */
}

/* 以下是原有樣式，保持不變 */

.nav-header *,
.nav-header *::before,
.nav-header *::after {
    box-sizing: border-box;
}

:root {
    --nav-height: 60px;
    --nav-height-scrolled: 50px;
    --dark-bg: #121212;
    --dark-light: #1e1e1e;
    --dark-hover: rgba(255, 255, 255, 0.05);
    --primary: #aa3cff;
    --primary-hover: #b355ff;
    --text-light: #ffffff;
    --text-muted: rgba(255, 255, 255, 0.7);
    --text-dimmed: rgba(255, 255, 255, 0.5);
    --border-color: rgba(255, 255, 255, 0.1);
    --shadow-color: rgba(0, 0, 0, 0.2);
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

.nav-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--nav-height);
    background-color: var(--dark-bg);
    z-index: 1000;
    transition: all var(--transition-normal);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    border-bottom: 1px solid var(--border-color);
}

.nav-header.nav-scrolled {
    height: var(--nav-height-scrolled);
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.15);
}

.nav-header.nav-hidden {
    transform: translateY(-100%);
    box-shadow: none;
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    padding: 0 1.5rem;
    max-width: 1400px;
    margin: 0 auto;
    position: relative;
}

.nav-logo {
    display: flex;
    align-items: center;
    height: 100%;
}

.nav-logo-img {
    height: 36px;
    transition: height var(--transition-normal);
    display: block;
}

.nav-scrolled .nav-logo-img {
    height: 32px;
}

.nav-main {
    height: 100%;
    flex: 1;
}

.nav-list {
    display: flex;
    height: 100%;
    margin: 0;
    padding: 0;
    list-style: none;
    justify-content: center;
}

.nav-item {
    height: 100%;
    display: flex;
    align-items: center;
    position: relative;
    margin: 0 0.4rem;
}

.nav-link {
    display: flex;
    align-items: center;
    height: 30%;
    padding: 0 0.8rem;
    color: var(--text-muted);
    font-size: 0.95rem;
    text-decoration: none;
    transition: color var(--transition-fast);
    font-weight: 500;
    letter-spacing: 0.5px;
    position: relative;
    font-family: "Microsoft YaHei", "微软雅黑", "PingFang SC", "Hiragino Sans GB", sans-serif;
}

.nav-link:hover,
.nav-link:focus,
.nav-item.active .nav-link {
    color: var(--text-light);
    text-decoration: none;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 22px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background-color: var(--primary);
    transition: width var(--transition-fast);
    pointer-events: none;
}

.nav-link:hover::after,
.nav-link:focus::after,
.nav-item.active .nav-link::after {
    width: 24px;
}

.nav-has-dropdown {
    position: relative;
}

.nav-container {
    position: relative;
}

.nav-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    background-color: var(--dark-light);
    border-radius: 8px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.2);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all var(--transition-normal);
    z-index: 100;
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.nav-has-dropdown {
    position: relative;
}

/* 風格下拉選單懸停效果 */
.nav-item[style*="position: static"]:hover .nav-dropdown {
    transform: translateX(-50%) translateY(0);
}

.nav-item[style*="position: relative"]:hover .nav-dropdown {
    transform: translateY(0);
}

.nav-has-dropdown:hover .nav-dropdown,
.nav-has-dropdown.active .nav-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.nav-dropdown-grid {
    padding: 2rem;
    width: max-content;
    max-height: 80vh;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--primary) transparent;
}

.nav-dropdown-grid::-webkit-scrollbar {
    width: 6px;
}

.nav-dropdown-grid::-webkit-scrollbar-track {
    background: transparent;
}

.nav-dropdown-grid::-webkit-scrollbar-thumb {
    background-color: rgba(255, 255, 255, 0.2);
    border-radius: 3px;
}

.nav-dropdown-content {
    display: grid;
    grid-template-columns: repeat(5, 180px);
    gap: 2.5rem 2rem;
    width: max-content;
    margin: 0 auto;
}

@media (max-width: 1200px) {
    .nav-dropdown-content {
        grid-template-columns: repeat(4, 180px);
    }
}

@media (max-width: 992px) {
    .nav-dropdown-content {
        grid-template-columns: repeat(3, 180px);
    }
}

@media (max-width: 768px) {
    .nav-dropdown-content {
        grid-template-columns: repeat(2, 180px);
    }
}

@media (max-width: 480px) {
    .nav-dropdown-content {
        grid-template-columns: repeat(1, 180px);
    }
}

@media (max-width: 1200px) {
    .nav-dropdown-content {
        max-width: 800px;
        margin: 0 auto;
    }
}

@media (max-width: 992px) {
    .nav-dropdown-content {
        max-width: 600px;
        margin: 0 auto;
    }
}

@media (max-width: 768px) {
    .nav-dropdown-content {
        max-width: 400px;
        margin: 0 auto;
    }
}

@media (max-width: 480px) {
    .nav-dropdown-content {
        max-width: 300px;
        margin: 0 auto;
    }
}

.nav-category-group {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
    margin-bottom: 1.2rem;
}

.nav-category-title {
    padding-bottom: 0.5rem;
    margin-bottom: 0.8rem;
    border-bottom: 1px solid var(--border-color);
    position: relative;
    display: flex;
    align-items: center;
}

.nav-category-title:after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -1px;
    width: 30px;
    height: 2px;
    background: linear-gradient(to right, var(--category-color, var(--primary)), rgba(170, 60, 255, 0.3));
    border-radius: 1px;
}

.nav-category-link {
    color: var(--text-light);
    font-size: 1rem;
    text-decoration: none;
    font-weight: 500;
    letter-spacing: 0.5px;
    transition: color var(--transition-fast);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    font-family: "Microsoft YaHei", "微软雅黑", "PingFang SC", "Hiragino Sans GB", sans-serif;
}

.nav-category-link:hover {
    color: var(--primary);
    text-decoration: none;
}

/* 風格數量計數器 */
.nav-category-count {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 20px;
    height: 20px;
    padding: 0 6px;
    margin-left: 8px;
    background-color: rgba(170, 60, 255, 0.15);
    color: var(--primary);
    font-size: 0.75rem;
    font-weight: 500;
    border-radius: 10px;
    transition: all 0.3s ease;
}

.nav-category-title:hover .nav-category-count {
    background-color: rgba(170, 60, 255, 0.25);
    transform: scale(1.05);
}

.nav-category-sublinks {
    display: flex;
    flex-direction: column;
    gap: 3rem;
    max-height: 320px;
    overflow-y: auto;
    padding: 2.2rem;
    scrollbar-width: thin;
    scrollbar-color: var(--primary) transparent;
}

.nav-category-sublinks::-webkit-scrollbar {
    width: 4px;
}

.nav-category-sublinks::-webkit-scrollbar-track {
    background: transparent;
}

.nav-category-sublinks::-webkit-scrollbar-thumb {
    background-color: rgba(255, 255, 255, 0.2);
    border-radius: 2px;
}

.nav-category-sublinks:hover::-webkit-scrollbar-thumb {
    background-color: var(--primary);
}

.nav-dropdown-items::-webkit-scrollbar {
    width: 4px;
}

.nav-dropdown-items::-webkit-scrollbar-track {
    background: transparent;
}

.nav-dropdown-items:hover::-webkit-scrollbar-thumb {
    background-color: rgba(255, 255, 255, 0.2);
    border-radius: 2px;
}

.nav-dropdown-link {
    display: block;
    padding: 0.5rem 0.7rem;
    color: var(--text-muted);
    font-size: 0.9rem;
    text-decoration: none;
    transition: all var(--transition-fast);
    border-radius: 4px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    line-height: 1.4;
    font-family: "Microsoft YaHei", "微软雅黑", "PingFang SC", "Hiragino Sans GB", sans-serif;
    letter-spacing: 0.3px;
}

.nav-dropdown-link:hover {
    color: var(--text-light);
    background-color: var(--dark-hover);
    padding-left: 0.85rem;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

/* 简单下拉菜单样式 */
.nav-dropdown-simple {
    padding: 0.75rem 0;
    min-width: 180px;
    left: 0 !important; /* 強制置於左側 */
    transform: translateY(10px) !important;
    right: auto !important; /* 確保不受右側對齊影響 */
}

/* 套曲和專輯下拉選單懸停效果 */
.nav-item[style*="position: relative"]:hover .nav-dropdown-simple {
    transform: translateY(0) !important;
}

/* 更多子菜单 */
.nav-dropdown-more {
    position: relative;
}

.nav-dropdown-more-toggle {
    display: flex;
    align-items: center;
    padding: 0.5rem 0.7rem;
    color: var(--text-muted);
    font-size: 0.9rem;
    text-decoration: none;
    transition: all var(--transition-fast);
    border-radius: 4px;
    cursor: pointer;
}

.nav-dropdown-more-toggle::after {
    content: '';
    margin-left: 0.5rem;
    width: 0;
    height: 0;
    border-left: 4px solid transparent;
    border-right: 4px solid transparent;
    border-top: 4px solid var(--text-muted);
    transition: transform var(--transition-fast);
}

.nav-dropdown-more.active .nav-dropdown-more-toggle::after {
    transform: rotate(180deg);
}

.nav-dropdown-more-toggle:hover {
    color: var(--text-light);
    background-color: var(--dark-hover);
    padding-left: 0.85rem;
}

.nav-dropdown-submenu {
    display: none;
    padding: 0.5rem 0 0.5rem 1rem;
}

.nav-dropdown-more.active .nav-dropdown-submenu {
    display: block;
}

.nav-dropdown-subitem {
    margin-bottom: 0.3rem;
}

.nav-dropdown-sublink {
    display: block;
    padding: 0.3rem 0.5rem;
    color: var(--text-dimmed);
    font-size: 0.85rem;
    text-decoration: none;
    transition: all var(--transition-fast);
    border-radius: 4px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.nav-dropdown-sublink:hover {
    color: var(--text-muted);
    background-color: var(--dark-hover);
    padding-left: 0.65rem;
}

/* 右侧操作区域 */
.nav-actions {
    display: flex;
    align-items: center;
    height: 100%;
}

/* 搜索框 */
.nav-search {
    margin-right: 1rem;
}

.nav-search-form {
    position: relative;
    display: flex;
}

.nav-search-input {
    width: 200px;
    height: 36px;
    padding: 0 2.5rem 0 1rem;
    background-color: rgba(255, 255, 255, 0.1);
    border: 1px solid var(--border-color);
    border-radius: 18px;
    color: var(--text-light);
    font-size: 0.9rem;
    transition: all var(--transition-fast);
    outline: none;
}

.nav-search-input:focus {
    width: 240px;
    background-color: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.2);
    box-shadow: 0 0 0 2px rgba(170, 60, 255, 0.2);
}

.nav-search-btn {
    position: absolute;
    right: 0;
    top: 0;
    height: 36px;
    width: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    transition: color var(--transition-fast);
    outline: none;
    padding: 0;
}

.nav-search-btn:hover {
    color: var(--text-light);
}

/* 確保登錄區域可見 */
#loginAjax {
    display: block !important;
    visibility: visible !important;
    opacity: 1 !important;
    min-height: 40px;
}

/* 移除載入提示 */
#loginAjax:empty::before {
    content: "";
}

/* 登錄狀態樣式 */
.login-status-guest {
    display: flex !important;
    gap: 0.75rem;
    align-items: center;
    visibility: visible !important;
    opacity: 1 !important;
}

.login-btn {
    display: inline-flex !important;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.6rem 1.2rem;
    border-radius: 25px;
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 600;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    color: white !important;
    text-decoration: none !important;
    min-width: 80px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.login-btn:first-child {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%) !important;
}

.login-btn:last-child {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%) !important;
}

.login-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.25);
    color: white !important;
    text-decoration: none !important;
}

.login-btn:active {
    transform: translateY(0);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

/* 已登錄用戶狀態樣式 - 優化版本 */
.simple-user-status {
    display: flex;
    align-items: center;
    gap: 1rem;
    position: relative;
    padding: 0.5rem;
    border-radius: 25px;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: all 0.3s ease;
}

.simple-user-status:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.3);
    transform: translateY(-1px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.user-avatar-simple {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid rgba(255, 255, 255, 0.3);
    transition: all 0.3s ease;
    cursor: pointer;
    position: relative;
}

.user-avatar-simple:hover {
    border-color: rgba(255, 255, 255, 0.6);
    transform: scale(1.05);
}

.user-avatar-simple::after {
    content: '';
    position: absolute;
    top: -2px;
    right: -2px;
    width: 12px;
    height: 12px;
    background: #4caf50;
    border-radius: 50%;
    border: 2px solid #fff;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.manage-center-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 1.2rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-decoration: none;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(102, 126, 234, 0.3);
}

.manage-center-link:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
    color: white;
    text-decoration: none;
}

.manage-center-link:active {
    transform: translateY(0);
    box-shadow: 0 2px 8px rgba(102, 126, 234, 0.3);
}

/* 用戶下拉菜單樣式 */
.user-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: 0.5rem;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(15px);
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.2);
    min-width: 200px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    z-index: 1000;
}

.simple-user-status:hover .user-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.user-dropdown-header {
    padding: 1rem;
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    text-align: center;
}

.user-dropdown-name {
    font-weight: 600;
    color: #333;
    margin-bottom: 0.25rem;
    font-size: 1rem;
}

.user-dropdown-email {
    color: #666;
    font-size: 0.875rem;
}

.user-dropdown-menu {
    list-style: none;
    margin: 0;
    padding: 0.5rem 0;
}

.user-dropdown-item {
    margin: 0;
}

.user-dropdown-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    color: #555;
    text-decoration: none;
    transition: all 0.2s ease;
    border-radius: 0;
}

.user-dropdown-link:hover {
    background: rgba(102, 126, 234, 0.1);
    color: #667eea;
    text-decoration: none;
}

.user-dropdown-link i {
    width: 16px;
    text-align: center;
    color: #667eea;
}

.user-dropdown-divider {
    height: 1px;
    background: rgba(0, 0, 0, 0.1);
    margin: 0.5rem 0;
}

.user-dropdown-logout {
    color: #e74c3c !important;
}

.user-dropdown-logout:hover {
    background: rgba(231, 76, 60, 0.1) !important;
    color: #e74c3c !important;
}

.user-dropdown-logout i {
    color: #e74c3c !important;
}

/* 用戶信息顯示 - 添加前缀避免与登录状态组件冲突 */
.nav-user-info {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.nav-user-name {
    font-weight: 600;
    color: white;
    font-size: 0.9rem;
}

.nav-user-role {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* 響應式調整 */
@media (max-width: 768px) {
    .login-status-guest {
        flex-direction: column;
        gap: 0.25rem;
    }
    
    .login-btn {
        padding: 0.4rem 0.8rem;
        font-size: 0.8rem;
    }
    
    .simple-user-status {
        flex-direction: column;
        gap: 0.5rem;
        text-align: center;
    }
    
    .user-avatar-simple {
        width: 28px;
        height: 28px;
    }
}

/* 移动端菜单按钮 */
.nav-mobile-toggle {
    display: none;
    background: none;
    border: none;
    padding: 0;
    width: 24px;
    height: 24px;
    position: relative;
    cursor: pointer;
    outline: none;
    margin-left: 1rem;
}

.nav-toggle-icon,
.nav-toggle-icon::before,
.nav-toggle-icon::after {
    display: block;
    width: 100%;
    height: 2px;
    background-color: var(--text-muted);
    transition: all var(--transition-normal);
    position: absolute;
}

.nav-toggle-icon {
    top: 50%;
    transform: translateY(-50%);
}

.nav-toggle-icon::before,
.nav-toggle-icon::after {
    content: '';
    left: 0;
}

.nav-toggle-icon::before {
    top: -8px;
}

.nav-toggle-icon::after {
    bottom: -8px;
}

.nav-mobile-toggle.active .nav-toggle-icon {
    background-color: transparent;
}

.nav-mobile-toggle.active .nav-toggle-icon::before {
    top: 0;
    transform: rotate(45deg);
    background-color: var(--text-light);
}

.nav-mobile-toggle.active .nav-toggle-icon::after {
    bottom: 0;
    transform: rotate(-45deg);
    background-color: var(--text-light);
}

/* 响应式调整 */
@media (max-width: 1200px) {
    .nav-search-input {
        width: 180px;
    }
    
    .nav-search-input:focus {
        width: 220px;
    }
    
    .nav-link {
        padding: 0 0.6rem;
    }
}

@media (max-width: 991px) {
    .nav-mobile-toggle {
        display: block;
    }
    
    .nav-main {
        position: fixed;
        top: var(--nav-height);
        left: 0;
        width: 100%;
        height: calc(100vh - var(--nav-height));
        background-color: var(--dark-bg);
        padding: 1rem;
        overflow-y: auto;
        transform: translateX(-100%);
        transition: transform var(--transition-normal);
        z-index: 999;
        box-shadow: 2px 0 10px rgba(0, 0, 0, 0.1);
        display: block;
    }
    
    .nav-main.active {
        transform: translateX(0);
    }
    
    body.nav-open {
        overflow: hidden;
    }
    
    .nav-list {
        flex-direction: column;
        height: auto;
        align-items: flex-start;
        padding: 1rem 0;
    }
    
    .nav-item {
        width: 100%;
        height: auto;
        margin: 0;
    }
    
    .nav-link {
        padding: 0.8rem 0;
        height: auto;
    }
    
    .nav-link::after {
        display: none;
    }
    
    .nav-has-dropdown .nav-link::before {
        content: '';
        position: absolute;
        right: 0;
        top: 50%;
        transform: translateY(-50%);
        width: 0;
        height: 0;
        border-left: 5px solid transparent;
        border-right: 5px solid transparent;
        border-top: 5px solid var(--text-muted);
        transition: transform var(--transition-fast);
    }
    
    .nav-has-dropdown.active .nav-link::before {
        transform: translateY(-50%) rotate(180deg);
    }
    
    .nav-dropdown {
        position: static;
        width: 100%;
        opacity: 1;
        visibility: hidden;
        height: 0;
        overflow: hidden;
        transform: none;
        box-shadow: none;
        border-radius: 0;
        background-color: transparent;
        border: none;
        padding: 0;
        margin: 0;
    }
    
    .nav-has-dropdown.active .nav-dropdown {
        visibility: visible;
        height: auto;
    }
    
    .nav-dropdown-grid {
        padding: 0 0 0 1rem;
        max-height: none;
    }
    
    .nav-dropdown-column {
        width: 100%;
    }
    
    .nav-dropdown-heading {
        font-size: 1rem;
    }
    
    .nav-dropdown-simple {
        padding: 0 0 0 1rem;
    }
    
    .nav-dropdown-link {
        padding: 0.7rem 0;
    }
    
    .nav-dropdown-more-toggle {
        padding: 0.7rem 0;
    }
    
    .nav-dropdown-submenu {
        padding-left: 1.5rem;
    }
    
    .nav-dropdown-sublink {
        padding: 0.5rem 0;
    }
    
    .nav-search {
        width: 100%;
        margin-right: 0;
        margin-bottom: 1rem;
    }
    
    .nav-search-input {
        width: 100%;
    }
    
    .nav-search-input:focus {
        width: 100%;
    }
}

@media (max-width: 767px) {
    .nav-container {
        padding: 0 1rem;
    }
    
    .nav-search-input {
        height: 34px;
    }
    
    .nav-search-input:focus {
        width: 100%;
    }
    
    .nav-logo-img {
        height: 36px;
    }
    
    .nav-scrolled .nav-logo-img {
        height: 32px;
    }
}

@media (max-width: 480px) {
    .nav-search {
        display: none;
    }
    
    .nav-main {
        width: 100%;
    }
}

/* 动画效果 */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.nav-dropdown-item {
    animation: fadeIn 0.3s ease forwards;
    opacity: 0;
    transform: translateY(10px);
}

.nav-dropdown-item:nth-child(1) { animation-delay: 0.05s; }
.nav-dropdown-item:nth-child(2) { animation-delay: 0.1s; }
.nav-dropdown-item:nth-child(3) { animation-delay: 0.15s; }
.nav-dropdown-item:nth-child(4) { animation-delay: 0.2s; }
.nav-dropdown-item:nth-child(5) { animation-delay: 0.25s; }
.nav-dropdown-item:nth-child(6) { animation-delay: 0.3s; }
.nav-dropdown-item:nth-child(7) { animation-delay: 0.35s; }
.nav-dropdown-item:nth-child(8) { animation-delay: 0.4s; }
.nav-dropdown-item:nth-child(9) { animation-delay: 0.45s; }
.nav-dropdown-item:nth-child(10) { animation-delay: 0.5s; }