/* ==============================
   河木资源站 - 后台管理样式
   ============================== */

:root {
    --primary: #1890ff;
    --primary-light: #40a9ff;
    --primary-dark: #096dd9;
    --success: #52c41a;
    --warning: #faad14;
    --danger: #ff4d4f;
    --bg: #f0f2f5;
    --card-bg: #ffffff;
    --text: #1f1f1f;
    --text-secondary: #666666;
    --text-tertiary: #999999;
    --border: #e8e8e8;
    --border-light: #f0f0f0;
    --sidebar-width: 220px;
    --header-height: 56px;
    --radius: 8px;
    --radius-sm: 4px;
    --shadow: 0 2px 8px rgba(0,0,0,0.06);
    --shadow-hover: 0 4px 16px rgba(0,0,0,0.1);
    --transition: all 0.25s ease;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
    font-size: 14px;
    line-height: 1.6;
    color: var(--text);
    background: var(--bg);
}

a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-dark); }

/* ===== 登录页 ===== */
.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #e6f7ff 0%, #f0f2f5 100%);
}

.login-box {
    width: 380px;
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 36px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.08);
}

.login-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-size: 22px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 8px;
}

.login-logo i { font-size: 28px; }

.login-title {
    text-align: center;
    font-size: 16px;
    color: var(--text-secondary);
    font-weight: 400;
    margin-bottom: 24px;
}

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

.login-form label {
    display: block;
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.login-form label i { margin-right: 4px; }

.login-form input {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 14px;
    outline: none;
    transition: var(--transition);
}

.login-form input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(24,144,255,0.1);
}

.btn-login {
    width: 100%;
    padding: 11px;
    background: var(--primary);
    color: #fff;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
}

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

.login-footer {
    text-align: center;
    margin-top: 16px;
    font-size: 13px;
}

/* ===== 提示框 ===== */
.alert {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    margin-bottom: 16px;
    line-height: 1.5;
}

.alert i { font-size: 16px; flex-shrink: 0; margin-top: 1px; }
.alert-info { background: #e6f7ff; color: #096dd9; border: 1px solid #91d5ff; }
.alert-success { background: #f6ffed; color: #389e0d; border: 1px solid #b7eb8f; }
.alert-error { background: #fff2f0; color: #cf1322; border: 1px solid #ffccc7; }
.alert-warning { background: #fffbe6; color: #d48806; border: 1px solid #ffe58f; }

/* ===== 后台布局 ===== */
.admin-layout {
    display: flex;
    min-height: 100vh;
}

/* 侧边栏 */
.admin-sidebar {
    width: var(--sidebar-width);
    background: #001529;
    color: #fff;
    position: fixed;
    top: 0; left: 0;
    height: 100vh;
    overflow-y: auto;
    z-index: 100;
}

.sidebar-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    height: var(--header-height);
    font-size: 16px;
    font-weight: 600;
    color: #fff;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.sidebar-logo i { font-size: 22px; color: var(--primary-light); }

.sidebar-menu { padding: 8px 0; }

.menu-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 11px 20px;
    color: rgba(255,255,255,0.7);
    font-size: 14px;
    transition: var(--transition);
    cursor: pointer;
}

.menu-item:hover, .menu-item.active {
    color: #fff;
    background: var(--primary);
}

.menu-item i { font-size: 16px; width: 18px; text-align: center; }

/* 主内容区 */
.admin-main {
    flex: 1;
    margin-left: var(--sidebar-width);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.admin-header {
    height: var(--header-height);
    background: var(--card-bg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    box-shadow: 0 1px 4px rgba(0,0,0,0.06);
    position: sticky;
    top: 0;
    z-index: 50;
}

.header-title { font-size: 16px; font-weight: 600; }

.header-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

.header-user {
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--text-secondary);
    font-size: 13px;
}

.header-user i { font-size: 18px; color: var(--primary); }

.header-right a { font-size: 13px; color: var(--text-secondary); }
.header-right a:hover { color: var(--danger); }

.admin-content {
    flex: 1;
    padding: 20px 24px;
}

/* ===== 统计卡片 ===== */
.stat-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 20px;
}

.stat-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 20px;
    box-shadow: var(--shadow);
    display: flex;
    align-items: center;
    gap: 14px;
}

.stat-icon {
    width: 48px; height: 48px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    flex-shrink: 0;
}

.stat-icon.blue { background: #e6f7ff; color: var(--primary); }
.stat-icon.green { background: #f6ffed; color: var(--success); }
.stat-icon.orange { background: #fff7e6; color: var(--warning); }
.stat-icon.red { background: #fff2f0; color: var(--danger); }

.stat-info { flex: 1; }
.stat-value { font-size: 24px; font-weight: 700; color: var(--text); }
.stat-label { font-size: 13px; color: var(--text-secondary); }

/* ===== 数据表格 ===== */
.data-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
}

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

.card-title { font-size: 15px; font-weight: 600; }

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
}

.data-table th, .data-table td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border-light);
}

.data-table th {
    background: #fafafa;
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.data-table tr:hover td { background: #fafafa; }

.data-table .thumb-cell img {
    width: 60px; height: 40px;
    object-fit: cover;
    border-radius: var(--radius-sm);
    background: var(--bg);
}

/* 状态标签 */
.badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 500;
}

.badge-success { background: #f6ffed; color: #389e0d; }
.badge-danger { background: #fff2f0; color: #cf1322; }
.badge-warning { background: #fffbe6; color: #d48806; }

/* 操作按钮 */
.btn-action {
    display: inline-flex;
    align-items: center;
    gap: 3px;
    padding: 4px 10px;
    border-radius: var(--radius-sm);
    font-size: 12px;
    border: none;
    cursor: pointer;
    transition: var(--transition);
}

.btn-edit { background: #e6f7ff; color: var(--primary); }
.btn-edit:hover { background: var(--primary); color: #fff; }

.btn-del { background: #fff2f0; color: var(--danger); }
.btn-del:hover { background: var(--danger); color: #fff; }

/* ===== 表单 ===== */
.form-card {
    max-width: 900px;
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 24px;
}

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

.form-group { margin-bottom: 18px; }

.form-group label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--text);
    margin-bottom: 6px;
}

.form-group label .required { color: var(--danger); margin-left: 2px; }

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 9px 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 14px;
    outline: none;
    transition: var(--transition);
    font-family: inherit;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(24,144,255,0.1);
}

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

.form-hint { font-size: 12px; color: var(--text-tertiary); margin-top: 4px; }

/* 图片上传预览 */
.image-upload {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.image-preview {
    width: 100%;
    max-width: 300px;
    height: 180px;
    border: 2px dashed var(--border);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-tertiary);
    font-size: 13px;
    cursor: pointer;
    background: var(--bg);
    overflow: hidden;
    position: relative;
}

.image-preview.has-image { border-style: solid; border-color: var(--primary-light); }

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

.image-preview .upload-text {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
}

.image-preview i { font-size: 28px; }

/* 截图管理 */
.screenshots-manage {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    gap: 10px;
}

.screenshot-item {
    position: relative;
    aspect-ratio: 4/3;
    border-radius: var(--radius-sm);
    overflow: hidden;
    border: 1px solid var(--border);
    background: var(--bg);
}

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

.screenshot-item .remove-btn {
    position: absolute;
    top: 4px; right: 4px;
    width: 22px; height: 22px;
    background: var(--danger);
    color: #fff;
    border: none;
    border-radius: 50%;
    font-size: 12px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition);
}

.screenshot-item:hover .remove-btn { opacity: 1; }

.screenshot-add {
    aspect-ratio: 4/3;
    border: 2px dashed var(--border);
    border-radius: var(--radius-sm);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--text-tertiary);
    font-size: 12px;
    cursor: pointer;
    transition: var(--transition);
    background: var(--bg);
}

.screenshot-add:hover { border-color: var(--primary); color: var(--primary); }
.screenshot-add i { font-size: 20px; margin-bottom: 4px; }

/* 网盘链接组 */
.pan-links {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.pan-link-row {
    display: grid;
    grid-template-columns: 140px 1fr 100px 1fr 40px;
    gap: 10px;
    align-items: center;
    background: var(--bg);
    padding: 12px;
    border-radius: var(--radius-sm);
}

.pan-link-row select,
.pan-link-row input { margin-bottom: 0 !important; }

.pan-link-row .btn-remove {
    width: 32px; height: 32px;
    border: none; border-radius: 50%;
    background: transparent;
    color: var(--text-tertiary);
    cursor: pointer;
    font-size: 16px;
    display: flex; align-items: center; justify-content: center;
}

.pan-link-row .btn-remove:hover { background: #fff2f0; color: var(--danger); }

.btn-add-pan {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 8px 16px;
    background: var(--primary);
    color: #fff;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 13px;
    cursor: pointer;
    transition: var(--transition);
}

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

/* 表单底部按钮 */
.form-actions {
    display: flex;
    gap: 12px;
    padding-top: 16px;
    border-top: 1px solid var(--border-light);
}

.btn-submit {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 24px;
    background: var(--primary);
    color: #fff;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

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

.btn-cancel {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 24px;
    background: var(--bg);
    color: var(--text-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 14px;
    cursor: pointer;
    transition: var(--transition);
}

.btn-cancel:hover { border-color: var(--primary); color: var(--primary); }

/* ===== 分类标签栏 ===== */
.cat-tab {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 13px;
    color: var(--text-secondary);
    background: var(--bg);
    border: 1px solid transparent;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.cat-tab:hover {
    color: var(--primary);
    background: #e6f7ff;
    border-color: #91d5ff;
}

.cat-tab.active {
    color: #fff;
    background: var(--primary);
    border-color: var(--primary);
    font-weight: 500;
}

.cat-tab.active:hover {
    color: #fff;
    background: var(--primary-dark);
}

.cat-count {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 20px;
    height: 18px;
    padding: 0 5px;
    border-radius: 10px;
    font-size: 11px;
    font-weight: 500;
    background: rgba(255,255,255,0.3);
    color: inherit;
}

.cat-tab:not(.active) .cat-count {
    background: rgba(0,0,0,0.06);
}

/* ===== 响应式 ===== */
@media (max-width: 768px) {
    .admin-sidebar { transform: translateX(-100%); }
    .admin-main { margin-left: 0; }
    .form-row { grid-template-columns: 1fr; }
    .pan-link-row {
        grid-template-columns: 1fr;
        gap: 8px;
    }
}