* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

.container {
    display: flex;
    min-height: 100vh;
    background-color: #f5f6fa;
}

.sidebar {
    width: 250px;
    background: linear-gradient(180deg, #2c3e50 0%, #34495e 100%);
    color: white;
    padding: 20px 0;
    position: fixed;
    height: 100vh;
    box-shadow: 4px 0 10px rgba(0,0,0,0.1);
}

.logo {
    padding: 20px;
    text-align: center;
    border-bottom: 1px solid rgba(255,255,255,0.1);
    margin-bottom: 10px;
}

.logo-link {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
}

.logo-link:hover {
    transform: scale(1.02);
}

.logo i {
    font-size: 32px;
    color: #3498db;
    animation: float 3s ease-in-out infinite;
    filter: drop-shadow(0 2px 4px rgba(0,0,0,0.2));
}

@keyframes float {
    0% { transform: translateY(0); }
    50% { transform: translateY(-5px); }
    100% { transform: translateY(0); }
}

.logo h2 {
    font-size: 20px;
    font-weight: 500;
    letter-spacing: 1px;
    text-shadow: 0 2px 4px rgba(0,0,0,0.2);
    color: #fff;
}

.nav-menu {
    max-height: calc(100vh - 180px);
    overflow-y: auto;
    padding: 10px 0;
}

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

.nav-menu::-webkit-scrollbar-track {
    background: rgba(255,255,255,0.05);
}

.nav-menu::-webkit-scrollbar-thumb {
    background: rgba(52, 152, 219, 0.3);
    border-radius: 4px;
}

.nav-menu::-webkit-scrollbar-thumb:hover {
    background: rgba(52, 152, 219, 0.5);
}

.nav-menu ul {
    list-style: none;
    padding: 0;
}

.nav-menu li {
    margin: 2px 8px;
    border-radius: 6px;
    transition: all 0.3s ease;
}

.nav-menu li:hover {
    background-color: rgba(255,255,255,0.1);
}

.nav-menu a {
    color: rgba(255,255,255,0.7);
    text-decoration: none;
    display: flex;
    align-items: center;
    justify-content: flex-start;
    padding: 12px 30px 12px 20px;
    font-size: 14px;
    transition: all 0.3s ease;
    text-align: left;
    position: relative;
}

.nav-menu a:hover {
    color: #3498db;
    background-color: rgba(52, 152, 219, 0.1);
}

.nav-menu i:not(.arrow) {
    margin-right: 12px;
    width: 18px;
    font-size: 16px;
    text-align: center;
}

.submenu {
    display: none;
    background-color: rgba(0,0,0,0.2);
    margin: 5px;
    border-radius: 4px;
}

.submenu li {
    margin: 2px 4px;
}

.submenu a {
    padding: 10px 30px 10px 50px;
    font-size: 13px;
    color: rgba(255,255,255,0.6);
}

.has-submenu.active > a,
.submenu li.active > a {
    color: #fff;
    background-color: #3498db;
    border-radius: 6px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
}

.has-submenu.active .submenu {
    display: block;
    animation: slideDown 0.3s ease-out;
}

@keyframes slideDown {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

.arrow {
    position: absolute;
    right: 15px;
    font-size: 12px;
    transition: transform 0.3s;
    opacity: 0.7;
}

.has-submenu > a {
    position: relative;
}

.nav-menu a {
    padding-right: 30px;
}

.has-submenu.active .arrow {
    transform: rotate(180deg);
}

.user-info {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 250px;
    background: linear-gradient(0deg, #2c3e50 0%, rgba(44,62,80,0.9) 100%);
    padding: 15px;
    display: flex;
    align-items: center;
    border-top: 1px solid rgba(255,255,255,0.1);
    backdrop-filter: blur(10px);
}

.user-avatar {
    width: 40px;
    height: 40px;
    margin-right: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(52, 152, 219, 0.1);
    border-radius: 50%;
    transition: all 0.3s ease;
}

.user-avatar:hover {
    transform: scale(1.05);
    background: rgba(52, 152, 219, 0.2);
}

.user-avatar i {
    font-size: 24px;
    color: #fff;
}

.user-details {
    flex: 1;
}

.user-name {
    font-size: 14px;
    font-weight: 500;
    color: white;
    margin-bottom: 4px;
}

.user-role {
    font-size: 12px;
    color: rgba(255,255,255,0.7);
}

.user-actions {
    display: flex;
    gap: 8px;
}

.user-actions a {
    background: rgba(52, 152, 219, 0.1);
    color: rgba(255,255,255,0.7);
    font-size: 16px;
    transition: all 0.3s ease;
    padding: 6px;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.user-actions a:hover {
    color: #3498db;
    background: rgba(52, 152, 219, 0.2);
    transform: translateY(-1px);
}

.user-settings-btn {
    background: rgba(52, 152, 219, 0.1);
    border: none;
    color: rgba(255,255,255,0.7);
    cursor: pointer;
    padding: 6px;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.user-settings-btn:hover {
    color: #3498db;
    background: rgba(52, 152, 219, 0.2);
    transform: translateY(-1px);
}

.user-settings-btn i {
    font-size: 16px;
}

.main-content {
    flex: 1;
    margin-left: 250px;
    padding: 20px;
}

header {
    padding: 20px;
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 2px 12px rgba(0,0,0,0.08);
    margin-bottom: 20px;
}

/* 优化模态框样式 */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.5);
    backdrop-filter: blur(4px);
}

.modal-content {
    position: relative;
    background-color: #fff;
    margin: 5% auto;
    padding: 0;
    width: 500px;
    border-radius: 8px;
    box-shadow: 0 4px 24px rgba(0,0,0,0.15);
    animation: modalSlideIn 0.3s ease-out;
}

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

.modal-header {
    padding: 20px 24px;
    border-bottom: 1px solid #f0f0f0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: #fafafa;
    border-radius: 8px 8px 0 0;
}

.modal-header h3 {
    margin: 0;
    color: #333;
    font-size: 18px;
    font-weight: 500;
}

.modal-body {
    padding: 24px;
    max-height: calc(100vh - 250px);
    overflow-y: auto;
}

.modal-body::-webkit-scrollbar {
    width: 6px;
}

.modal-body::-webkit-scrollbar-track {
    background: #f5f5f5;
    border-radius: 3px;
}

.modal-body::-webkit-scrollbar-thumb {
    background: #ddd;
    border-radius: 3px;
}

.modal-body::-webkit-scrollbar-thumb:hover {
    background: #ccc;
}

.modal-footer {
    padding: 16px 24px;
    border-top: 1px solid #f0f0f0;
    text-align: right;
    background: #fafafa;
    border-radius: 0 0 8px 8px;
}

.close {
    color: #999;
    font-size: 20px;
    font-weight: normal;
    cursor: pointer;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
    transition: all 0.3s;
}

.close:hover {
    color: #666;
    background: rgba(0,0,0,0.05);
}

.settings-item {
    margin-bottom: 20px;
}

.settings-item:last-child {
    margin-bottom: 0;
}

.settings-item label {
    display: block;
    margin-bottom: 8px;
    color: #333;
    font-size: 14px;
}

.settings-item input {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid #d9d9d9;
    border-radius: 4px;
    transition: all 0.3s;
    font-size: 14px;
}

.settings-item input:hover {
    border-color: #40a9ff;
}

.settings-item input:focus {
    border-color: #40a9ff;
    outline: none;
    box-shadow: 0 0 0 2px rgba(24,144,255,0.2);
}

.settings-item input:disabled {
    background: #f5f5f5;
    border-color: #d9d9d9;
    cursor: not-allowed;
    color: #999;
}

/* 分组设置项 */
.settings-group {
    margin-bottom: 24px;
    padding-bottom: 24px;
    border-bottom: 1px solid #f0f0f0;
}

.settings-group:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.settings-group-title {
    margin-bottom: 16px;
    color: #333;
    font-size: 16px;
    font-weight: 500;
}

/* 修改按钮样式 */
.modal-footer .primary-btn,
.modal-footer .cancel-btn {
    height: 32px;
    padding: 0 16px;
    font-size: 14px;
    border-radius: 4px;
    transition: all 0.3s;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 68px;
}

.modal-footer .primary-btn {
    background: #1890ff;
    border: 1px solid #1890ff;
    color: #fff;
    margin-left: 8px;
}

.modal-footer .primary-btn:hover {
    background: #40a9ff;
    border-color: #40a9ff;
}

.modal-footer .primary-btn:active {
    background: #096dd9;
    border-color: #096dd9;
}

.modal-footer .cancel-btn {
    background: transparent;
    border: 1px solid #d9d9d9;
    color: rgba(0, 0, 0, 0.65);
}

.modal-footer .cancel-btn:hover {
    color: #40a9ff;
    border-color: #40a9ff;
    background: rgba(24, 144, 255, 0.05);
}

.modal-footer .cancel-btn:active {
    color: #096dd9;
    border-color: #096dd9;
    background: rgba(24, 144, 255, 0.1);
}

/* 修改表单布局相关样式 */
.settings-form {
    display: flex;
    flex-wrap: wrap;
    margin: 0 -12px;  /* 抵消两侧padding */
}

.settings-item {
    width: 50%;
    padding: 0 12px;
    margin-bottom: 20px;
    box-sizing: border-box;
}

/* 密码修改组保持单列 */
.settings-group.password-group .settings-item {
    width: 100%;
}