:root {
    --primary-color: #4361ee;
    --primary-light: #4895ef;
    --secondary-color: #3f37c9;
    --accent-color: #4cc9f0;
    --light-color: #f8f9fa;
    --dark-color: #212529;
    --gray-light: #e9ecef;
    --gray-medium: #adb5bd;
    --gray-dark: #6c757d;
    --success-color: #4caf50;
    --warning-color: #ff9800;
    --error-color: #f44336;
    --border-radius: 12px;
    --box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    --transition-fast: 0.2s;
    --transition-normal: 0.3s;
    --transition-slow: 0.5s;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', 'Segoe UI', sans-serif;
}

body {
    background-color: #f5f7fb;
    color: var(--dark-color);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
}

/* 头部样式 */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
    margin-bottom: 30px;
    flex-wrap: wrap;
    gap: 20px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 15px;
}

.logo i {
    font-size: 2.5rem;
    color: var(--primary-color);
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo h1 {
    font-size: 1.8rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.search-box {
    position: relative;
    flex-grow: 1;
    max-width: 500px;
    min-width: 200px;
}

.search-box input {
    width: 100%;
    padding: 14px 20px 14px 50px;
    border: none;
    border-radius: var(--border-radius);
    background-color: white;
    box-shadow: var(--box-shadow);
    font-size: 1rem;
    transition: all var(--transition-normal);
}

.search-box input:focus {
    outline: none;
    box-shadow: 0 5px 25px rgba(67, 97, 238, 0.15);
    transform: translateY(-2px);
}

.search-box i {
    position: absolute;
    left: 20px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--gray-medium);
    font-size: 1.2rem;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 15px;
}

.user-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    font-size: 1.2rem;
    cursor: pointer;
    transition: transform var(--transition-fast);
}

.user-avatar:hover {
    transform: scale(1.05);
}

/* 主要内容区域 */
.main-content {
    display: flex;
    gap: 30px;
    flex-wrap: wrap;
}

/* 侧边栏 */
.sidebar {
    flex: 0 0 250px;
    background-color: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 25px;
    height: fit-content;
}

@media (max-width: 992px) {
    .sidebar {
        flex: 1 1 100%;
        order: 2;
    }
}

.sidebar h3 {
    font-size: 1.2rem;
    margin-bottom: 20px;
    color: var(--dark-color);
    font-weight: 600;
}

.sidebar-menu {
    list-style: none;
    margin-bottom: 30px;
}

.sidebar-menu li {
    margin-bottom: 10px;
    border-radius: 10px;
    overflow: hidden;
}

.sidebar-menu a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 16px;
    color: var(--gray-dark);
    text-decoration: none;
    border-radius: 10px;
    transition: all var(--transition-fast);
}

.sidebar-menu a:hover, .sidebar-menu a.active {
    background-color: rgba(67, 97, 238, 0.1);
    color: var(--primary-color);
    transform: translateX(5px);
}

.sidebar-menu i {
    font-size: 1.2rem;
    width: 24px;
    text-align: center;
}

.storage-info {
    background: linear-gradient(135deg, var(--primary-light), var(--primary-color));
    color: white;
    padding: 20px;
    border-radius: var(--border-radius);
    margin-top: 30px;
}

.storage-info h4 {
    font-size: 1rem;
    margin-bottom: 15px;
    font-weight: 500;
}

.storage-bar {
    height: 8px;
    background-color: rgba(255, 255, 255, 0.3);
    border-radius: 4px;
    margin-bottom: 10px;
    overflow: hidden;
}

.storage-used {
    height: 100%;
    width: 65%;
    background-color: white;
    border-radius: 4px;
    transition: width var(--transition-slow);
}

.storage-stats {
    display: flex;
    justify-content: space-between;
    font-size: 0.9rem;
}

/* 文件区域 */
.file-area {
    flex: 1;
    min-width: 300px;
    background-color: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 30px;
}

@media (max-width: 992px) {
    .file-area {
        flex: 1 1 100%;
        order: 1;
    }
}

.file-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    flex-wrap: wrap;
    gap: 15px;
}

.file-header h2 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--dark-color);
}

.action-buttons {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 10px;
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.btn::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 5px;
    height: 5px;
    background: rgba(255, 255, 255, 0.5);
    opacity: 0;
    border-radius: 100%;
    transform: scale(1, 1) translate(-50%);
    transform-origin: 50% 50%;
}

.btn:focus:not(:active)::after {
    animation: ripple 1s ease-out;
}

@keyframes ripple {
    0% {
        transform: scale(0, 0);
        opacity: 0.5;
    }
    100% {
        transform: scale(20, 20);
        opacity: 0;
    }
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
    box-shadow: 0 4px 15px rgba(67, 97, 238, 0.3);
}

.btn-primary:hover {
    background-color: var(--secondary-color);
    transform: translateY(-3px);
    box-shadow: 0 7px 20px rgba(67, 97, 238, 0.4);
}

.btn-primary:active {
    transform: translateY(-1px);
}

.btn-secondary {
    background-color: var(--light-color);
    color: var(--dark-color);
}

.btn-secondary:hover {
    background-color: var(--gray-light);
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
}

.btn-danger {
    background-color: var(--error-color);
    color: white;
}

.btn-danger:hover {
    background-color: #d32f2f;
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(244, 67, 54, 0.3);
}

.btn-success {
    background-color: var(--success-color);
    color: white;
}

.btn-success:hover {
    background-color: #388e3c;
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(76, 175, 80, 0.3);
}

/* 文件列表 */
.file-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 20px;
}

@media (max-width: 768px) {
    .file-list {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    }
}

.file-item {
    background-color: white;
    border-radius: var(--border-radius);
    padding: 20px;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.05);
    transition: all var(--transition-normal);
    cursor: pointer;
    border: 2px solid transparent;
    position: relative;
    overflow: hidden;
}

.file-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    border-color: rgba(67, 97, 238, 0.2);
}

.file-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    font-size: 1.8rem;
    color: white;
}

.file-icon.image {
    background: linear-gradient(135deg, #ffffff, #ffffff);
}

.file-icon.video {
    background: linear-gradient(135deg, #a18cd1, #fbc2eb);
}

.file-icon.audio {
    background: linear-gradient(135deg, #ffecd2, #fcb69f);
}

.file-icon.document {
    background: linear-gradient(135deg, #84fab0, #8fd3f4);
}

.file-icon.folder {
    background: linear-gradient(135deg, #a6c0fe, #f68084);
}

.file-name {
    font-weight: 600;
    margin-bottom: 5px;
    word-break: break-word;
    text-align: center;
}

.file-size {
    font-size: 0.85rem;
    color: var(--gray-dark);
    text-align: center;
}

.file-checkbox {
    position: absolute;
    top: 10px;
    left: 10px;
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.file-item:hover .file-checkbox {
    opacity: 1;
}

.file-actions {
    position: absolute;
    top: 10px;
    right: 10px;
    display: flex;
    gap: 5px;
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.file-item:hover .file-actions {
    opacity: 1;
}

.file-action-btn {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background-color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.file-action-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 3px 8px rgba(0, 0, 0, 0.15);
}

/* 骨架屏加载效果 */
.skeleton-loading {
    animation: skeleton-loading 1.5s infinite ease-in-out;
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    border-radius: 4px;
}

@keyframes skeleton-loading {
    0% {
        background-position: 200% 0;
    }
    100% {
        background-position: -200% 0;
    }
}

/* 弹窗通用样式 */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    background-color: white;
    border-radius: var(--border-radius);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.2);
    width: 90%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    transform: scale(0.9);
    opacity: 0;
    transition: all var(--transition-normal);
}

.modal-overlay.active .modal {
    transform: scale(1);
    opacity: 1;
}

.modal-header {
    padding: 25px 30px 15px;
    border-bottom: 1px solid var(--gray-light);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-title {
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--dark-color);
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--gray-medium);
    cursor: pointer;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.modal-close:hover {
    background-color: var(--gray-light);
    color: var(--dark-color);
}

.modal-body {
    padding: 20px 30px;
}

.modal-footer {
    padding: 15px 30px 25px;
    border-top: 1px solid var(--gray-light);
    display: flex;
    justify-content: flex-end;
    gap: 15px;
}

/* 上传弹窗样式 */
.upload-options {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
    margin: 20px 0;
}

@media (max-width: 576px) {
    .upload-options {
        grid-template-columns: 1fr;
    }
}

.upload-option {
    border: 2px solid var(--gray-light);
    border-radius: var(--border-radius);
    padding: 20px;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.upload-option:hover, .upload-option.selected {
    border-color: var(--primary-color);
    background-color: rgba(67, 97, 238, 0.05);
    transform: translateY(-3px);
}

.upload-option i {
    font-size: 2.5rem;
    margin-bottom: 10px;
    color: var(--primary-color);
}

.upload-option h4 {
    font-size: 1.1rem;
    margin-bottom: 5px;
}

.upload-option p {
    font-size: 0.9rem;
    color: var(--gray-dark);
}

.upload-area {
    border: 2px dashed var(--gray-medium);
    border-radius: var(--border-radius);
    padding: 40px 20px;
    text-align: center;
    margin: 20px 0;
    transition: all var(--transition-fast);
}

.upload-area.dragover {
    border-color: var(--primary-color);
    background-color: rgba(67, 97, 238, 0.05);
}

.upload-area i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.upload-area h3 {
    font-size: 1.3rem;
    margin-bottom: 10px;
}

.upload-area p {
    color: var(--gray-dark);
    margin-bottom: 20px;
}

.progress-bar {
    height: 10px;
    background-color: var(--gray-light);
    border-radius: 5px;
    margin: 20px 0;
    overflow: hidden;
    display: none;
}

.progress {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-light), var(--primary-color));
    border-radius: 5px;
    width: 0%;
    transition: width var(--transition-normal);
}

/* 图片预览弹窗 */
.image-preview-modal .modal {
    max-width: 90%;
    max-height: 90%;
    width: auto;
    height: auto;
}

.image-preview {
    max-width: 100%;
    max-height: 70vh;
    border-radius: 8px;
    display: block;
    margin: 0 auto;
}

/* 错误提示组件 */
.error-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: 10px;
    max-width: 400px;
}

.error-alert {
    background-color: white;
    border-left: 5px solid var(--error-color);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 20px;
    display: flex;
    align-items: flex-start;
    gap: 15px;
    transform: translateX(100%);
    opacity: 0;
    animation: slideInRight var(--transition-normal) forwards;
    position: relative;
}

.error-alert.hiding {
    animation: slideOutRight var(--transition-normal) forwards;
}

.error-alert i {
    font-size: 1.5rem;
    color: var(--error-color);
    margin-top: 2px;
}

.error-content h4 {
    font-size: 1.1rem;
    margin-bottom: 5px;
    color: var(--dark-color);
}

.error-content p {
    font-size: 0.95rem;
    color: var(--gray-dark);
}

@keyframes slideInRight {
    0% {
        transform: translateX(100%);
        opacity: 0;
    }
    100% {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes slideOutRight {
    0% {
        transform: translateX(0);
        opacity: 1;
    }
    100% {
        transform: translateX(100%);
        opacity: 0;
    }
}

/* 文件操作动画 */
.file-item.adding {
    animation: fadeInUp var(--transition-normal);
}

.file-item.removing {
    animation: fadeOutDown var(--transition-normal);
}

@keyframes fadeInUp {
    0% {
        opacity: 0;
        transform: translateY(20px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeOutDown {
    0% {
        opacity: 1;
        transform: translateY(0);
    }
    100% {
        opacity: 0;
        transform: translateY(20px);
    }
}

/* 空状态 */
.empty-state {
    text-align: center;
    padding: 60px 20px;
}

.empty-state i {
    font-size: 4rem;
    color: var(--gray-light);
    margin-bottom: 20px;
}

.empty-state h3 {
    font-size: 1.5rem;
    margin-bottom: 10px;
    color: var(--gray-dark);
}

.empty-state p {
    color: var(--gray-medium);
    max-width: 400px;
    margin: 0 auto;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .container {
        padding: 15px;
    }

    header {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
    }

    .search-box {
        max-width: 100%;
        width: 100%;
    }

    .action-buttons {
        justify-content: center;
        width: 100%;
    }

    .btn {
        padding: 10px 18px;
        font-size: 0.9rem;
    }

    .modal-body, .modal-header, .modal-footer {
        padding: 20px;
    }
}

@media (max-width: 576px) {
    .modal {
        width: 95%;
    }

    .upload-options {
        grid-template-columns: 1fr;
    }

    .file-header {
        flex-direction: column;
        align-items: flex-start;
    }
}
.ipt1{
    padding-left: 10px;
    transition: all 0.5s;
    border-radius: var(--border-radius);
    width: 100%;
    height: 4vh;
    border: 2px solid var(--gray-light);
}
.ipt1:focus{
    padding-left: 20px;
    outline: none;
    border: 2px solid #3f37c9;
}