:root {
    /* --- 核心颜色 --- */
    --primary: #4a6b8a;           
    --primary-dark: #3a5570;      
    --primary-light: #eef3f8;     
    --primary-soft: #dfe9f2;      

    --success: #5a8a6e;           
    --success-light: #eef5f1;     
    --success-dark: #486d58;      

    --text-primary: #333f4d;      
    --text-secondary: #4a5560;    
    --text-tertiary: #8b98a5;     

    /* --- 背景色调整（加了微微的暖色，去掉灰冷感） --- */
    --bg-primary: #fefefe;        /* 几乎纯白，但带一丝极微弱的暖意，非常干净 */
    --bg-secondary: #f7f9fa;      /* 外围稍亮一点的浅灰，不再灰暗 */
    --bg-tertiary: #f0f4f6;       /* 第三级背景，稍微深一点用于区分 */

    /* --- 边框和阴影 --- */
    --border-light: #e8ebee;      
    --border-normal: #d9e0e6;     

    --shadow-sm: 0 2px 6px rgba(80, 100, 120, 0.04);   
    --shadow-md: 0 4px 12px rgba(80, 100, 120, 0.06);
    --shadow-lg: 0 8px 20px rgba(80, 100, 120, 0.08);

    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 18px;
    --radius-full: 999px;
    --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
body {
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    line-height: 1.4;
}
/* 顶部固定遮罩条：盖住欢迎栏/左侧列上方的10px空隙，防止滚动内容透出 */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 10px;
    background: var(--bg-secondary);
    z-index: 49;
    pointer-events: none;
}
.app-wrapper {
    min-height: 100vh;
    padding: 0 16px;
}
.main-content {
    max-width: 1700px;
    margin: 0 auto;
    padding: 10px 24px;
    width: 100%;
}
.lock-container {
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background: #eef2f5;
    padding: 20px;
}
.lock-card {
    background: #ffffff;
    border-radius: 8px;
    padding: 40px 38px 44px;
    width: 100%;
    max-width: 440px;
    text-align: left;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.06), 0 2px 4px rgba(0, 0, 0, 0.02);
    border: 1px solid #e2e6ea;
}
.lock-header {
    margin-bottom: 28px;
    border-bottom: 1px solid #eef2f6;
    padding-bottom: 20px;
}
.lock-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
}
.lock-logo-icon {
    width: 36px;
    height: 36px;
    background: var(--primary);
    border-radius: 6px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 18px;
    font-weight: 600;
}
.lock-logo-icon i {
    color: white;
    font-size: 18px;
}
.lock-logo-text {
    font-size: 20px;
    font-weight: 600;
    color: #1e2a3a;
    letter-spacing: 1px;
}
.lock-subtitle {
    font-size: 12px;
    color: #7a8e9e;
    background: #f5f7fa;
    display: inline-block;
    padding: 4px 12px;
    border-radius: 20px;
    margin-top: 8px;
}
.lock-card h2 {
    font-size: 22px;
    font-weight: 500;
    margin-bottom: 10px;
    color: #1e2f3e;
    letter-spacing: -0.2px;
}
.lock-card p {
    color: #6c7e94;
    margin-bottom: 28px;
    font-size: 14px;
    line-height: 1.6;
    border-left: 3px solid #cbd5e0;
    padding-left: 14px;
}
.lock-input {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid #ccd7e4;
    border-radius: 6px;
    font-size: 1rem;
    font-family: inherit;
    transition: all 0.2s ease;
    background: #ffffff;
    margin-bottom: 22px;
}
.lock-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(44, 90, 122, 0.1);
}
.lock-btn {
    width: 100%;
    padding: 12px 16px;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.2s;
    letter-spacing: 1px;
}
.lock-btn:hover {
    background: var(--primary-dark);
}
.lock-btn:active {
    background: #163a52;
    transform: none;
}
.lock-error {
    color: #b4554a;
    background: #fbf1f0;
    padding: 12px 16px;
    border-radius: 6px;
    font-size: 13px;
    margin-bottom: 24px;
    border-left: 4px solid #b4554a;
    display: flex;
    align-items: center;
    gap: 8px;
}
.lock-error i {
    color: #c72a2a;
    font-size: 14px;
}
.lock-footer {
    margin-top: 32px;
    padding-top: 20px;
    border-top: 1px solid #eef2f6;
    text-align: center;
    font-size: 11px;
    color: #8a9bb0;
}
.greeting-bar-wrapper {
    position: sticky;
    top: 10px;
    z-index: 50;
    background: var(--bg-secondary);
}
.greeting-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 16px;
    margin-bottom: 16px;
    background: var(--bg-primary);
    padding: 12px 20px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-light);
    box-shadow: var(--shadow-sm);
}
/* ===== 阅读进度线：固定于欢迎栏顶部那点小空间，从中心向两侧展开 ===== */
.reading-progress {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    z-index: 60;                 /* 高于 greeting-bar-wrapper 的 50 */
    background: transparent;
    pointer-events: none;
}
.reading-progress__fill {
    position: absolute;
    top: 0;
    left: 50%;
    height: 100%;
    width: var(--rp, 0%);        /* 由 JS 写入滚动进度 0% ~ 100% */
    transform: translateX(-50%); /* 居中锚定，宽度增长时向左右两侧对称展开 */
    background: linear-gradient(90deg, var(--primary-dark), var(--primary), var(--primary-dark));
    border-radius: 0 0 3px 3px;
    transition: width 0.1s ease-out;
}
.greeting-area {
    padding: 0;
    display: inline-flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}
.greeting-logo {
    flex-shrink: 0;
    display: flex;
    align-items: center;
}
.greeting-logo img {
    height: 40px;
    width: auto;
    display: block;
    border-radius: 6px;
}
.greeting-text {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--primary);
}
.greeting-text i {
    margin-right: 6px;
    font-size: 1.2rem;
    color: var(--primary);
}
.guest-name {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--text-primary);
}
.date-info {
    font-size: 1rem;
    color: var(--text-secondary);
    background: var(--bg-tertiary);
    padding: 6px 12px;
    border-radius: var(--radius-full);
    word-spacing: 0.3em;
}
.time-error {
    color: #c72a2a;
    background: #fef2f0;
    padding: 4px 10px;
    border-radius: var(--radius-full);
}
.admin-action {
    display: flex;
    gap: 10px;
    align-items: center;
}
/* ===== 搜索区域样式 ===== */
.search-area {
    display: flex;
    align-items: center;
    flex: 1;
    max-width: 420px;
    margin: 0 12px;
    position: relative;
    border-radius: var(--radius-full);
    transition: border-radius 0.2s ease;
}
.search-icon {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: #aaa;
    font-size: 1rem;
    pointer-events: none;
    z-index: 1;
}
.search-input {
    flex: 1;
    padding: 6px 14px 6px 36px;
    border: 1px solid var(--border-normal);
    border-radius: var(--radius-full);
    font-size: 0.9rem;
    outline: none;
    background: var(--bg-primary);
    transition: all 0.2s ease;
    height: 38px;
}
.search-input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(44,90,122,0.1);
}
.search-area.has-input .search-input {
    border-radius: var(--radius-full) 0 0 var(--radius-full);
    border-right: none;
}
.search-btn {
    padding: 0 16px;
    height: 38px;
    background: #eef2f5;
    color: #8a9bb0;
    border: 1px solid var(--border-normal);
    border-left: none;
    border-radius: 0 var(--radius-full) var(--radius-full) 0;
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.2s ease;
    display: none;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}
.search-btn.visible {
    display: flex;
}
.search-btn:hover {
    background: #e2e6ea;
    color: #4a627a;
}
/* ===== 图标美化样式 ===== */
.category-icon i {
    font-size: 1rem;
    width: 1.2em;
    text-align: center;
    color: var(--primary);
}
/* ===== 图标美化结束 ===== */
.home-btn, .admin-fixed-btn, .logout-btn {
    background: var(--bg-primary);
    padding: 0 18px;
    height: 38px;
    line-height: 38px;
    border-radius: var(--radius-full);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 600;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-light);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}
.home-btn i, .admin-fixed-btn i, .logout-btn i {
    font-size: 0.9rem;
}
.home-btn {
    color: var(--success);
    background: var(--success-light);
    border-color: #c5e0d0;
}
.admin-fixed-btn {
    color: var(--primary);
    background: var(--primary-light);
    border-color: #cbdde8;
}
.logout-btn {
    color: #9a4a4a;
    background: #f7f1f1;
    border-color: #e8dcdc;
}
.home-btn:hover {
    background: var(--success);
    color: white;
    border-color: var(--success);
}
.home-btn:hover i {
    color: white;
}
.admin-fixed-btn:hover {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}
.admin-fixed-btn:hover i {
    color: white;
}
.logout-btn:hover {
    background: #b53b3b;
    color: white;
    border-color: #b53b3b;
}
.logout-btn:hover i {
    color: white;
}
.nav-layout {
    display: flex;
    gap: 24px;
    position: relative;
    align-items: flex-start;
}
.page-row {
    display: flex;
    gap: 24px;
    align-items: flex-start;
}
.left-column {
    width: 220px;
    flex-shrink: 0;
    position: sticky;
    top: 10px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.right-side {
    flex: 1;
    min-width: 0;
}
.sidebar {
    width: 100%;
    height: fit-content;
    max-height: calc(100vh - 22px);
    overflow: hidden auto;
    background: var(--bg-secondary);
    padding: 16px 12px;
    border: 1px solid var(--border-normal);
    border-radius: var(--radius-md);
    box-shadow: none;
}
.sidebar::-webkit-scrollbar {
    width: 4px;
}
.sidebar::-webkit-scrollbar-thumb {
    background: var(--border-normal);
    border-radius: 4px;
}
.sidebar-logo {
    background: transparent;
    border: none;
    border-radius: var(--radius-md);
    padding: 12px 16px;
    text-align: center;
    flex-shrink: 0;
    cursor: pointer;
    user-select: none;
    -webkit-user-select: none;
    transition: transform .18s ease, opacity .18s ease;
}
.sidebar-logo:hover {
    border-color: transparent;
    box-shadow: none;
}
.sidebar-logo:active {
    transform: scale(.97);
}
.sidebar-logo.is-refreshing {
    opacity: .6;
    pointer-events: none;
}
.sidebar-logo img {
    max-width: 150px;
    height: auto;
    display: block;
    margin: 0 auto;
    border-radius: 8px;
}
.category-nav {
    list-style: none;
    margin: 0;
    padding: 0;
}
.category-nav-item {
    margin-bottom: 4px;
}
.category-nav-link {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
    border-left: 3px solid transparent;
    box-shadow: none;
    /* 阻止浏览器默认的链接拖拽行为和文本选中，让拖拽事件冒泡到 li 触发 Sortable */
    -webkit-user-drag: none;
    user-select: none;
    -webkit-user-select: none;
}
.category-nav-link:hover {
    background: var(--bg-tertiary);
    color: var(--primary);
}
.category-nav-link.active {
    background: var(--primary-light);
    color: var(--primary);
    border-left: 3px solid var(--primary);
}
.category-nav-link:active {
    box-shadow: none;
    transform: none;
}
.category-nav-link .category-icon {
    font-size: 1rem;
}
.category-nav-link .category-name {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.right-content {
    min-width: 0;
}
.category-card {
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    margin-bottom: 20px;
    border: 1px solid var(--border-light);
    transition: var(--transition);
    overflow: hidden;
}
.category-card:hover {
    box-shadow: var(--shadow-md);
    border-color: #d0dae4;
}
.category-card-header {
    padding: 6px 12px;
    background: linear-gradient(to right, var(--bg-primary), var(--bg-secondary));
    border-bottom: 1px solid var(--border-light);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}
.category-card-header h2 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 6px;
}
.category-card-header h2 .fa-folder-open {
    color: var(--primary);
    font-size: 0.95rem;
    width: 1.2em;
    text-align: center;
    flex-shrink: 0;
}
.links {
    padding: 8px 8px;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}
.site-link {
    position: relative;          /* 锚定 ::before 填充层 */
    overflow: hidden;            /* 裁掉未展开时的填充层 */
    isolation: isolate;          /* 建立独立堆叠上下文，填充层只压在背景上 */
    display: inline-flex;
    align-items: center;
    gap: 6px;
    text-decoration: none;
    background: transparent;
    padding: 6px 12px;
    border: 0;
    outline: none;
    border-radius: 6px;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: color 0.28s ease;
}
/* 背景填充层：从左向右 sweep 进来（浅蓝，hover 时铺满） */
.site-link::before {
    content: "";
    position: absolute;
    inset: 0;
    z-index: -1;                 /* 落在文字与图标之下 */
    background: linear-gradient(90deg, var(--primary-soft), var(--primary-light));
    transform: scaleX(0);
    transform-origin: center;        /* 中心为起点，向两侧铺满 */
    transition: transform 0.28s ease;
}
.site-favicon {
    width: 16px;
    height: 16px;
    border-radius: 3px;
    object-fit: contain;
    background: white;
}
.site-link:hover {
    color: var(--primary);       /* 浅蓝铺满后文字转主蓝，保持清晰 */
}
.site-link:hover::before {
    transform: scaleX(1);        /* 从中间向两侧铺满整块背景 */
}
/* ===== 页脚（改造版） ===== */
.site-footer {
    margin-top: 24px;
    padding: 24px 20px 16px;
    text-align: center;
    background: linear-gradient(180deg, var(--bg-secondary), var(--bg-tertiary));
    border-top: 1px solid var(--border-light);
    position: relative;
}
/* 顶部通栏收口线：撑满整宽、浅色软线，呼应顶部阅读进度线但不抢戏 */
.site-footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-soft), var(--primary-light), var(--primary-soft));
}
.footer-stats {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px 22px;
    margin-bottom: 8px;
}
.stat {
    font-size: 0.8rem;
    color: var(--text-tertiary);
    display: inline-flex;
    align-items: center;
    gap: 7px;
}
.stat i {
    color: var(--primary-dark);
    font-size: 0.95rem;
}
.stat b {
    color: var(--primary-dark);
    font-weight: 600;
}
.footer-env {
    margin-top: 8px;
    font-size: 0.8rem;
    color: var(--text-tertiary);
    letter-spacing: 0.02em;
}
/* ===== 返回顶部按钮 ===== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 40px;
    height: 40px;
    background: var(--primary);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all 0.25s ease;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    z-index: 999;
    border: none;
}
/* 显示状态：半透明（能看到） */
.back-to-top.show {
    opacity: 0.5;
    visibility: visible;
}
/* 鼠标悬停：恢复正常颜色（不透明） */
.back-to-top.show:hover {
    opacity: 1;
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.2);
}
.back-to-top:active {
    transform: translateY(0);
}
.back-icon {
    color: white;
    width: 22px;
    height: 22px;
}
/* 平板端：缩小左侧列和logo，给右侧更多空间 */
@media (max-width: 1024px) {
    .left-column {
        width: 190px;
    }
    .sidebar-logo img {
        max-width: 130px;
    }
}
@media (max-width: 768px) {
    .left-column {
        display: none;
    }
    .greeting-bar {
        flex-direction: column;
        align-items: stretch;
        padding: 12px 16px;
    }
    .empty-state {
        margin-left: 0;
    }
    .flash-error {
        margin: 0 16px 12px 16px;
    }
    .greeting-area {
        justify-content: space-between;
    }
    .greeting-logo img {
        height: 30px;
    }
    .admin-action {
        justify-content: flex-start;
    }
    .search-area {
        max-width: 100%;
        margin: 4px 0;
        order: 10;
    }
    .links {
        padding: 6px 6px;
    }
    .site-link {
        padding: 4px 10px;
        font-size: 0.9rem;
    }
    .category-nav-link {
        font-size: 0.9rem;
    }
    .lock-card {
        padding: 30px 24px 36px;
        max-width: 100%;
    }
    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 36px;
        height: 36px;
    }
    .back-icon {
        width: 18px;
        height: 18px;
    }
}
.empty-state {
    margin-left: 244px;
}
.empty-state .site-link {
    background: var(--primary-light);
    font-size: 1rem;
    color: var(--primary);
    border-radius: 20px;
}

/* ================================================================
   编辑模式样式
   ================================================================ */

/* 退出编辑按钮 */
.admin-exit-btn {
    background: #fef2f0;
    color: #b53b3b;
    padding: 0 18px;
    height: 38px;
    line-height: 38px;
    border-radius: var(--radius-full);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 600;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
    border: 1px solid #f0d5d0;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}
.admin-exit-btn:hover {
    background: #b53b3b;
    color: white;
    border-color: #b53b3b;
}
.admin-exit-btn:hover i { color: white; }

/* 侧边栏添加分类 */
.sidebar-add-cate {
    margin-bottom: 12px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border-light);
}
.add-cate-form {
    display: flex;
    gap: 6px;
}
.add-cate-form input {
    flex: 1;
    padding: 6px 10px;
    border: 1px solid var(--border-normal);
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    outline: none;
    background: var(--bg-primary);
    min-width: 0;
}
.add-cate-form input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(44,90,122,0.1);
}
.btn-add-cate {
    width: 30px;
    height: 30px;
    border: none;
    background: var(--primary);
    color: white;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 0.8rem;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: background 0.2s;
}
.btn-add-cate:hover { background: var(--primary-dark); }

/* 分类拖拽手柄 */
.cate-drag-handle {
    cursor: grab;
    color: var(--text-tertiary);
    font-size: 0.75rem;
    padding: 0 2px;
    user-select: none;
    flex-shrink: 0;
    letter-spacing: -2px;
}
.cate-drag-handle:active { cursor: grabbing; }

/* 分类计数徽章 */
.cate-count-badge {
    background: var(--bg-tertiary);
    color: var(--text-tertiary);
    font-size: 0.7rem;
    padding: 1px 7px;
    border-radius: var(--radius-full);
    flex-shrink: 0;
    font-weight: 500;
}

/* 分类导航项布局调整（编辑模式） */
.category-nav-item {
    display: flex;
    align-items: center;
    gap: 2px;
}
.category-nav-item .category-nav-link {
    flex: 1;
    min-width: 0;
}

/* 分类项虚线拖拽框（编辑模式，与右侧链接风格一致） */
body.admin-mode .category-nav-item {
    border: 1px dashed transparent;
    border-radius: 6px;
    padding: 3px 4px;
    cursor: grab;
}
body.admin-mode .category-nav-item:hover {
    border-color: var(--primary);
    background: var(--primary-light);
}
body.admin-mode .category-nav-item:active {
    cursor: grabbing;
}

/* 分类导航操作按钮 */
.cate-nav-actions {
    display: none;
    gap: 2px;
    flex-shrink: 0;
}
.category-nav-item:hover .cate-nav-actions {
    display: flex;
}
.cate-nav-btn {
    width: 22px;
    height: 22px;
    border: none;
    background: transparent;
    color: var(--text-tertiary);
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.7rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}
.cate-nav-btn:hover {
    background: var(--bg-tertiary);
    color: var(--primary);
}
.cate-nav-btn.cate-del-btn:hover {
    background: #fef2f0;
    color: #b53b3b;
}

/* 分类头部操作区 */
.cate-header-actions {
    display: flex;
    align-items: center;
    gap: 10px;
}
.cate-site-count {
    font-size: 0.8rem;
    color: var(--text-tertiary);
    font-weight: 400;
}
.cate-header-btn {
    background: var(--primary-light);
    color: var(--primary);
    border: 1px solid #cbdde8;
    padding: 4px 12px;
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}
.cate-header-btn:hover {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

/* 添加链接表单 */
.add-site-form {
    padding: 10px 12px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-light);
}
.add-site-form form {
    display: flex;
    gap: 8px;
    align-items: center;
    flex-wrap: wrap;
}
.add-site-form input {
    padding: 6px 10px;
    border: 1px solid var(--border-normal);
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    outline: none;
    background: var(--bg-primary);
}
.add-site-form input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(44,90,122,0.1);
}
.add-site-form input[name="s_name"] { width: 300px; flex: 0 0 300px; }
.add-site-form input[name="s_url"] { width: 380px; flex: 0 0 380px; }
.add-site-form input[name="s_note"] { width: 240px; flex: 0 0 240px; }
.add-site-form .form-actions {
    display: flex;
    gap: 6px;
}

/* 通用按钮 */
.btn {
    padding: 6px 14px;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    border: none;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}
.btn-sm { padding: 4px 10px; font-size: 0.8rem; }
.btn-primary { background: var(--primary); color: white; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-success { background: var(--success); color: white; }
.btn-success:hover { background: var(--success-dark); }
.btn-outline { background: var(--bg-primary); color: var(--text-secondary); border: 1px solid var(--border-normal); }
.btn-outline:hover { background: var(--bg-tertiary); }
.btn-cancel { background: var(--bg-tertiary); color: var(--text-secondary); }
.btn-cancel:hover { background: var(--border-normal); }
.btn-danger { background: #b53b3b; color: white; }
.btn-danger:hover { background: #9a3030; }

/* 站点项容器（编辑模式） */
.site-list .site-item {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    position: relative;
    border: 1px dashed transparent;
    border-radius: 6px;
    padding: 3px 6px;
    margin: 1px 0;
    overflow: visible;
    transition: border-color 0.2s ease, background 0.2s ease;
}
.site-list .site-item:hover {
    border-color: var(--primary);
    background: var(--primary-light);
}
.site-item .site-link {
    padding-right: 4px;
}
.site-item-actions {
    position: absolute;
    bottom: calc(100% + 6px);
    right: -4px;
    display: flex;
    gap: 2px;
    flex-shrink: 0;
    padding: 2px;
    background: var(--bg-primary);
    border: 1px solid var(--border-normal);
    border-radius: 6px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
    z-index: 20;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    /* 关键：absolute 脱离文档流 + 定位在虚线框右上方外侧，
       bottom: calc(100% + 6px) 让按钮完全浮在框上方并与虚线框留 6px 间隙，
       不压住上面那条虚线，也不占用链接空间、不压文字。
       ::after 是一个透明的"桥接"区域，覆盖按钮与虚线框之间的 6px 空隙，
       鼠标从链接移到按钮时不会经过空白区，:hover 不会断，按钮不会消失。 */
    transition: opacity 0.15s ease, visibility 0.15s ease;
}
/* 透明桥接区：填满按钮底边到虚线框顶边的空隙，保证 hover 连续 */
.site-item-actions::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    height: 6px;
    background: transparent;
    pointer-events: auto;
}
.site-item:hover .site-item-actions {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}
.site-action-btn {
    width: 24px;
    height: 24px;
    border: none;
    background: transparent;
    color: var(--text-tertiary);
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}
.site-action-btn:hover {
    background: var(--bg-tertiary);
    color: var(--primary);
}
.site-action-btn.site-delete-btn:hover {
    background: #fef2f0;
    color: #b53b3b;
}
.site-action-btn.site-move-btn:hover {
    background: var(--success-light);
    color: var(--success);
}

/* 备注标记 */
.site-note-dot {
    color: var(--text-tertiary);
    font-size: 0.65rem;
    margin-left: 2px;
    opacity: 0.6;
}
.site-link:hover .site-note-dot { opacity: 1; }

/* 空分类提示 */
.empty-cate-hint {
    color: var(--text-tertiary);
    font-size: 0.85rem;
    padding: 12px 8px;
    font-style: italic;
}

/* ================================================================
   模态框样式
   ================================================================ */
.modal-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.45);
    z-index: 10000;
    align-items: center;
    justify-content: center;
    padding: 20px;
}
.modal-overlay.show {
    display: flex;
}
.modal-box {
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
    width: 100%;
    max-width: 480px;
    max-height: 90vh;
    overflow-y: auto;
    animation: modalIn 0.2s ease;
}
.modal-small { max-width: 400px; }
@keyframes modalIn {
    from { opacity: 0; transform: translateY(-10px) scale(0.98); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}
.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-light);
}
.modal-header h3 {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 8px;
    margin: 0;
}
.modal-header h3 i { color: var(--primary); }
.modal-close {
    width: 30px;
    height: 30px;
    border: none;
    background: transparent;
    color: var(--text-tertiary);
    font-size: 1.3rem;
    cursor: pointer;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
    line-height: 1;
}
.modal-close:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}
.modal-box form {
    padding: 20px;
}
.form-group {
    margin-bottom: 14px;
}
.form-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 6px;
}
.form-group input,
.form-group select {
    width: 100%;
    padding: 9px 12px;
    border: 1px solid var(--border-normal);
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    outline: none;
    background: var(--bg-primary);
    transition: all 0.2s;
    box-sizing: border-box;
}
.form-group input:focus,
.form-group select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(44,90,122,0.1);
}
.form-error {
    color: #b53b3b;
    background: #fef2f0;
    padding: 8px 12px;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    margin-bottom: 14px;
    border-left: 3px solid #b53b3b;
}
.move-hint {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 14px;
    background: var(--bg-secondary);
    padding: 8px 12px;
    border-radius: var(--radius-sm);
}
.move-hint strong { color: var(--primary); }
.modal-buttons {
    display: flex;
    gap: 10px;
    justify-content: flex-end;
    margin-top: 20px;
    padding-top: 16px;
    border-top: 1px solid var(--border-light);
}

/* ================================================================
   Toast 提示
   ================================================================ */
.toast-msg {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%) translateY(-20px);
    background: #1e2f3e;
    color: white;
    padding: 10px 24px;
    border-radius: var(--radius-full);
    font-size: 0.9rem;
    font-weight: 500;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
    z-index: 20000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    pointer-events: none;
}
.toast-msg.show {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

/* ===== Flash 错误提示（页面内联显示） ===== */
.flash-error {
    margin: 0 24px 16px 268px;
    padding: 12px 20px;
    background: #fef2f2;
    border: 1px solid #fecaca;
    border-left: 4px solid #dc2626;
    border-radius: 8px;
    color: #991b1b;
    font-size: 0.9rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 10px;
    animation: flashSlideIn 0.3s ease;
}
@keyframes flashSlideIn {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ================================================================
   Sortable 拖拽样式
   ================================================================ */
.sortable-ghost {
    opacity: 0.4;
    background: var(--primary-light);
}
.sortable-drag {
    opacity: 0.9;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    background: var(--bg-primary);
}
/* 拖拽时高亮"即将落入"的栏目（含同栏排序场景），提示可投放位置 */
.site-list:has(.sortable-ghost) {
    outline: 2px dashed var(--primary);
    outline-offset: 2px;
    border-radius: 8px;
}

/* 响应式：编辑模式 */
@media (max-width: 768px) {
    .add-site-form form {
        flex-direction: column;
        align-items: stretch;
    }
    .add-site-form input[name="s_name"],
    .add-site-form input[name="s_url"],
    .add-site-form input[name="s_note"] {
        width: 100%;
    }
    .cate-header-actions {
        flex-wrap: wrap;
    }
    .site-item-actions {
        display: flex;
        visibility: visible;
        opacity: 1;
    }
    .cate-nav-actions {
        display: flex;
    }
}

/* ================================================================
   编辑/浏览模式切换（AJAX 退出编辑用，由 body.admin-mode 类控制）
   ================================================================ */
body:not(.admin-mode) .admin-only { display: none !important; }
body.admin-mode .browse-only { display: none !important; }

/* 编辑模式下允许 .site-item-actions 悬浮按钮浮出卡片边界，
   否则 .category-card 的 overflow:hidden 会把右上角外侧的按钮裁掉 */
body.admin-mode .category-card { overflow: visible; }

/* 编辑模式下，链接只保留虚线框+悬浮按钮，去掉浏览模式的 hover 特效
   （背景 sweep 铺满 + 文字变蓝），避免和浏览模式混淆 */
body.admin-mode .site-item .site-link { cursor: default; }
body.admin-mode .site-item .site-link:hover {
    color: var(--text-secondary);
}
body.admin-mode .site-item .site-link:hover::before {
    transform: scaleX(0);
}