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

:root {
    --primary: #3b82f6;
    --primary-dark: #2563eb;
    --danger: #ef4444;
    --warning: #f59e0b;
    --success: #22c55e;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    --radius: 8px;
    --shadow: 0 1px 3px rgba(0,0,0,0.1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--gray-100);
    min-height: 100vh;
    color: var(--gray-800);
    line-height: 1.6;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 16px;
}

header {
    background: #fff;
    border-bottom: 1px solid var(--gray-200);
    padding: 20px 0;
    margin: -16px -16px 20px;
    text-align: center;
}

header h1 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 4px;
}

header h1 a {
    color: inherit;
    text-decoration: none;
}

.slogan {
    font-size: 0.875rem;
    color: var(--gray-500);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 8px 16px;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    transition: all 0.15s;
    gap: 6px;
}

.btn-primary {
    background: var(--primary);
    color: #fff;
}

.btn-primary:hover {
    background: var(--primary-dark);
}

.btn-secondary {
    background: var(--gray-200);
    color: var(--gray-700);
}

.btn-secondary:hover {
    background: var(--gray-300);
}

.btn-warning {
    background: var(--warning);
    color: #fff;
}

.btn-danger {
    background: var(--danger);
    color: #fff;
}

.btn-small {
    padding: 4px 10px;
    font-size: 0.75rem;
}

.btn-block {
    width: 100%;
}

.search-section {
    background: #fff;
    border-radius: var(--radius);
    padding: 16px;
    margin-bottom: 16px;
    box-shadow: var(--shadow);
}

.search-form {
    display: flex;
    gap: 8px;
}

.search-form input {
    flex: 1;
    padding: 10px 14px;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius);
    font-size: 0.875rem;
    outline: none;
}

.search-form input:focus {
    border-color: var(--primary);
}

.section {
    background: #fff;
    border-radius: var(--radius);
    margin-bottom: 16px;
    box-shadow: var(--shadow);
}

.section-header {
    padding: 16px;
    border-bottom: 1px solid var(--gray-100);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.section-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--gray-900);
}

.section-body {
    padding: 16px;
}

.section-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 8px;
}

.section-card {
    padding: 12px;
    background: var(--gray-50);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
    text-align: center;
    text-decoration: none;
    color: var(--gray-700);
    font-size: 0.8125rem;
    font-weight: 500;
    transition: all 0.15s;
}

.section-card:hover {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
}

.section-card.active {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
}

.post-list {
    list-style: none;
}

.post-item {
    padding: 12px 0;
    border-bottom: 1px solid var(--gray-100);
}

.post-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.post-item:first-child {
    padding-top: 0;
}

.post-item a {
    display: block;
    text-decoration: none;
    color: inherit;
}

.post-link {
    display: flex;
    align-items: center;
    gap: 12px;
}

.post-avatar {
    flex-shrink: 0;
}

.avatar-small {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    object-fit: cover;
    background: var(--gray-200);
}

.avatar-default {
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary), #8b5cf6);
    color: #fff;
    font-weight: 600;
    font-size: 0.875rem;
}

.post-content-wrapper {
    flex: 1;
    min-width: 0;
}

.post-item .title {
    font-weight: 500;
    color: var(--gray-900);
    margin-bottom: 4px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.post-item .meta {
    display: flex;
    gap: 12px;
    font-size: 0.75rem;
    color: var(--gray-500);
}

.tag {
    display: inline-block;
    padding: 2px 8px;
    background: var(--gray-100);
    border-radius: 4px;
    font-size: 0.6875rem;
    color: var(--gray-600);
}

.tag-primary {
    background: #eff6ff;
    color: var(--primary);
}

.empty {
    text-align: center;
    color: var(--gray-400);
    padding: 32px;
    font-size: 0.875rem;
}

.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    padding-top: 16px;
    border-top: 1px solid var(--gray-100);
    margin-top: 16px;
}

.page-info {
    font-size: 0.8125rem;
    color: var(--gray-500);
}

.form-section {
    background: #fff;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.form-header {
    padding: 16px;
    border-bottom: 1px solid var(--gray-100);
}

.form-header h2 {
    font-size: 1.125rem;
    font-weight: 600;
}

.form-body {
    padding: 16px;
}

.form-group {
    margin-bottom: 16px;
}

.form-group:last-child {
    margin-bottom: 0;
}

.form-group label {
    display: block;
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--gray-700);
    margin-bottom: 6px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius);
    font-size: 0.875rem;
    outline: none;
    transition: border-color 0.15s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--primary);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

.form-group input[type="file"] {
    background: var(--gray-50);
}

.form-actions {
    display: flex;
    gap: 8px;
    margin-top: 20px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

@media (max-width: 640px) {
    .form-row {
        grid-template-columns: 1fr;
    }
}

.qq-preview {
    margin-top: 8px;
}

.qq-loading {
    color: var(--gray-500);
    font-size: 0.75rem;
}

.qq-avatar-box {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 12px;
    background: var(--gray-50);
    border-radius: var(--radius);
    border: 1px solid var(--gray-200);
}

.qq-avatar-box img {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
}

.qq-avatar-box span {
    font-size: 0.8125rem;
    color: var(--gray-600);
}

.author-info {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}

.author-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    object-fit: cover;
    background: var(--gray-200);
}

.default-avatar {
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary), #8b5cf6);
    color: #fff;
    font-weight: 600;
    font-size: 1.25rem;
}

.author-detail {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.author-name {
    font-weight: 600;
    color: var(--gray-900);
    font-size: 0.9375rem;
}

.post-time {
    font-size: 0.75rem;
    color: var(--gray-500);
}

.header-nav {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-top: 10px;
}

.user-nav, .auth-nav {
    display: flex;
    align-items: center;
    gap: 8px;
}

.avatar-tiny {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    object-fit: cover;
}

.auth-form {
    max-width: 400px;
    margin: 0 auto;
}

.email-display {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 12px;
    background: var(--gray-50);
    border-radius: var(--radius);
    margin-bottom: 16px;
    font-size: 0.875rem;
}

.input-with-btn {
    display: flex;
    gap: 8px;
}

.input-with-btn input {
    flex: 1;
}

.form-hint {
    font-size: 0.75rem;
    color: var(--gray-500);
    margin-top: 4px;
}

.auth-footer {
    text-align: center;
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--gray-100);
    font-size: 0.875rem;
    color: var(--gray-500);
}

.auth-footer a {
    color: var(--primary);
    text-decoration: none;
}

.profile-section {
    background: #fff;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.profile-header {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 20px;
    border-bottom: 1px solid var(--gray-100);
}

.profile-avatar {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    overflow: hidden;
    background: var(--gray-100);
}

.profile-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.avatar-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary), #8b5cf6);
    color: #fff;
    font-size: 2rem;
    font-weight: 600;
}

.profile-info h2 {
    font-size: 1.125rem;
    margin-bottom: 4px;
}

.profile-info p {
    font-size: 0.8125rem;
    color: var(--gray-500);
}

.qq-info {
    color: var(--primary) !important;
}

.user-id {
    font-family: ui-monospace, monospace;
    color: var(--gray-600) !important;
    background: var(--gray-50);
    padding: 2px 6px;
    border-radius: 4px;
    display: inline-block;
    font-size: 0.75rem !important;
    margin: 2px 0;
}

.profile-tabs {
    display: flex;
    border-bottom: 1px solid var(--gray-100);
}

.avatar-upload {
    display: flex;
    align-items: center;
    gap: 12px;
}

.avatar-preview img {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    object-fit: cover;
}

.profile-actions {
    display: flex;
    gap: 8px;
    margin-top: 16px;
}

.user-info-bar {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 12px;
    background: var(--gray-50);
    border-radius: var(--radius);
    margin-bottom: 16px;
    font-size: 0.875rem;
}

.hint-text {
    font-size: 0.8125rem;
    color: var(--gray-500);
    margin-bottom: 12px;
}

.image-preview {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 8px;
}

.preview-item {
    position: relative;
    width: 80px;
    height: 80px;
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--gray-200);
}

.preview-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.preview-item button {
    position: absolute;
    top: 4px;
    right: 4px;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--danger);
    color: #fff;
    border: none;
    cursor: pointer;
    font-size: 12px;
    line-height: 1;
}

.alert {
    padding: 12px 14px;
    border-radius: var(--radius);
    font-size: 0.8125rem;
    margin-bottom: 16px;
}

.alert-error {
    background: #fef2f2;
    color: #dc2626;
    border: 1px solid #fecaca;
}

.alert-success {
    background: #f0fdf4;
    color: #16a34a;
    border: 1px solid #bbf7d0;
}

.alert-warning {
    background: #fffbeb;
    color: #d97706;
    border: 1px solid #fde68a;
}

.post-detail {
    background: #fff;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.post-header {
    padding: 20px;
    border-bottom: 1px solid var(--gray-100);
}

.post-header .tag {
    margin-bottom: 8px;
}

.post-header h1 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 12px;
}

.post-header .meta {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    font-size: 0.8125rem;
    color: var(--gray-500);
    margin-bottom: 12px;
}

.uuid-box {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 12px;
    background: var(--gray-50);
    border-radius: var(--radius);
    font-size: 0.8125rem;
}

.uuid-box code {
    font-family: ui-monospace, monospace;
    color: var(--primary);
    font-weight: 500;
}

.post-images {
    padding: 16px 20px;
    border-bottom: 1px solid var(--gray-100);
}

.post-images .img-item {
    display: block;
    border-radius: var(--radius);
    overflow: hidden;
}

.post-images img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    cursor: pointer;
    transition: transform 0.2s;
}

.post-images img:hover {
    transform: scale(1.02);
}

.post-images.images-single {
    display: block;
}

.post-images.images-single .img-item {
    max-width: 300px;
    max-height: 300px;
}

.post-images.images-single img {
    max-width: 300px;
    max-height: 300px;
}

.post-images.images-row {
    display: flex;
    gap: 8px;
    overflow-x: auto;
    padding-bottom: 8px;
}

.post-images.images-row .img-item {
    flex-shrink: 0;
    width: 160px;
    height: 120px;
}

.post-images.images-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
}

.post-images.images-grid .img-item {
    aspect-ratio: 1;
}

@media (max-width: 640px) {
    .post-images.images-single .img-item,
    .post-images.images-single img {
        max-width: 100%;
        max-height: 200px;
    }

    .post-images.images-row .img-item {
        width: 120px;
        height: 90px;
    }

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

.post-content {
    padding: 20px;
    font-size: 0.9375rem;
    color: var(--gray-700);
    white-space: pre-wrap;
    word-break: break-word;
}

.post-actions {
    padding: 16px 20px;
    border-top: 1px solid var(--gray-100);
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.related-posts {
    background: #fff;
    border-radius: var(--radius);
    margin-top: 16px;
    box-shadow: var(--shadow);
}

.related-posts .section-title {
    font-size: 0.875rem;
}

.info-box {
    padding: 14px;
    background: var(--gray-50);
    border-radius: var(--radius);
    margin-bottom: 16px;
    font-size: 0.8125rem;
}

.info-box p {
    margin: 4px 0;
}

.info-box code {
    font-family: ui-monospace, monospace;
    color: var(--primary);
}

.admin-container {
    max-width: 1000px;
}

.admin-panel {
    background: #fff;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.admin-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--gray-100);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.admin-header h2 {
    font-size: 1.125rem;
    font-weight: 600;
}

.admin-tabs {
    display: flex;
    border-bottom: 1px solid var(--gray-100);
    overflow-x: auto;
}

.tab-link {
    padding: 12px 20px;
    border: none;
    background: none;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--gray-500);
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: all 0.15s;
    white-space: nowrap;
    text-decoration: none;
    display: inline-block;
}

.tab-link:hover {
    color: var(--gray-700);
}

.tab-link.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
}

.tab-content {
    padding: 16px;
}

.filter-form {
    display: flex;
    gap: 8px;
    margin-bottom: 16px;
    flex-wrap: wrap;
}

.filter-form input,
.filter-form select {
    padding: 8px 12px;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius);
    font-size: 0.8125rem;
    outline: none;
}

.filter-form input {
    flex: 1;
    min-width: 150px;
}

.batch-actions {
    display: flex;
    gap: 8px;
    margin-bottom: 12px;
    flex-wrap: wrap;
}

.table-wrapper {
    overflow-x: auto;
}

.admin-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.8125rem;
}

.admin-table th,
.admin-table td {
    padding: 10px 12px;
    text-align: left;
    border-bottom: 1px solid var(--gray-100);
}

.admin-table th {
    background: var(--gray-50);
    font-weight: 600;
    color: var(--gray-600);
    white-space: nowrap;
}

.admin-table code {
    font-family: ui-monospace, monospace;
    font-size: 0.75rem;
    background: var(--gray-100);
    padding: 2px 6px;
    border-radius: 4px;
}

.admin-table a {
    color: var(--primary);
    text-decoration: none;
}

.admin-table a:hover {
    text-decoration: underline;
}

.status-normal {
    color: var(--success);
    font-weight: 500;
}

.status-banned {
    color: var(--danger);
    font-weight: 500;
}

.actions {
    display: flex;
    gap: 4px;
}

.ip-section {
    padding: 14px;
    background: var(--gray-50);
    border-radius: var(--radius);
    margin-bottom: 16px;
}

.ip-section h3 {
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 10px;
}

.inline-form {
    display: flex;
    gap: 8px;
}

.inline-form input {
    flex: 1;
    padding: 8px 12px;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius);
    font-size: 0.8125rem;
}

.inline-form select {
    padding: 8px 12px;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius);
    font-size: 0.8125rem;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 16px;
    margin-bottom: 20px;
}

.settings-form {
    max-width: 800px;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 12px;
    margin-bottom: 20px;
}

.stat-card {
    padding: 16px;
    background: var(--gray-50);
    border-radius: var(--radius);
    text-align: center;
}

.stat-title {
    font-size: 0.8125rem;
    color: var(--gray-500);
    margin-bottom: 4px;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 4px;
}

.stat-subtitle {
    font-size: 0.75rem;
    color: var(--gray-400);
}

.recent-section {
    margin-top: 20px;
}

.recent-section h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--gray-900);
}

@media (max-width: 640px) {
    .container {
        padding: 12px;
    }

    header {
        margin: -12px -12px 16px;
        padding: 16px 0;
    }

    header h1 {
        font-size: 1.25rem;
    }

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

    .search-form {
        flex-direction: column;
    }

    .form-actions {
        flex-direction: column;
    }

    .form-actions .btn {
        width: 100%;
    }

    .post-actions {
        flex-direction: column;
    }

    .post-actions .btn {
        width: 100%;
    }

    .post-header .meta {
        flex-direction: column;
        gap: 4px;
    }

    .uuid-box {
        flex-direction: column;
        align-items: flex-start;
    }

    .post-images img {
        max-width: 100%;
        max-height: 120px;
    }

    .admin-tabs {
        padding: 0 12px;
    }

    .tab-link {
        padding: 10px 14px;
        font-size: 0.8125rem;
    }

    .filter-form {
        flex-direction: column;
    }

    .filter-form input,
    .filter-form select {
        width: 100%;
    }

    .batch-actions {
        flex-direction: column;
    }

    .batch-actions .btn {
        width: 100%;
    }

    .admin-table th,
    .admin-table td {
        padding: 8px 10px;
    }

    .inline-form {
        flex-direction: column;
    }
}