/* ============================================================
   knip 在线工具站 —— 设计系统 v5(现代化视觉升级)
   特色:深色渐变导航 / 毛玻璃 / 卡片图标色块 / 渐变主按钮 /
        柔和阴影 / 移动端完整适配
   ============================================================ */

/* ===== 1. 设计变量 ===== */
:root {
    --knip-dark: #0f0f23;
    --knip-dark-2: #1a1a3e;
    --knip-dark-3: #0f3460;
    --knip-accent: #ffc107;
    --knip-accent-2: #ff9f0a;
    --knip-bg: #f4f5fb;
    --knip-card-border: #e6e8f0;
    --knip-radius: .8rem;
    --knip-radius-lg: 1.1rem;
    --knip-shadow: 0 2px 6px rgba(15,15,35,.06), 0 6px 20px rgba(15,15,35,.05);
    --knip-shadow-hover: 0 6px 14px rgba(15,15,35,.10), 0 16px 34px rgba(15,15,35,.12);
    --knip-grad-nav: linear-gradient(90deg, #0f0f23 0%, #1a1a3e 60%, #0f3460 100%);
    --knip-grad-btn: linear-gradient(135deg, #ffc107 0%, #ff9f0a 100%);
    --knip-grad-hero: linear-gradient(135deg, #0f0f23 0%, #1a1a3e 45%, #0f3460 100%);
}

/* ===== 2. 基础 ===== */
* { box-sizing: border-box; }

html {
    -webkit-text-size-adjust: 100%;
    text-size-adjust: 100%;
    /* 页面级绝不横向滚动（手机端防误触横滑） */
    overflow-x: hidden;
}

body {
    background-color: var(--knip-bg);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    overflow-x: hidden;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

main, .main-content { flex: 1 0 auto; }
img { max-width: 100%; }

/* ===== 3. 容器 ===== */
.container { max-width: 1200px; }

/* ===== 4. 导航栏(现代化) ===== */
.navbar-dark {
    background: var(--knip-grad-nav);
    box-shadow: 0 2px 12px rgba(15,15,35,.25);
}
.navbar-dark .navbar-brand {
    font-size: 1.35rem;
    font-weight: 800;
    letter-spacing: .3px;
    display: inline-flex;
    align-items: center;
    gap: .5rem;
}
.navbar-dark .navbar-brand .brand-icon {
    width: 34px;
    height: 34px;
    border-radius: 10px;
    background: var(--knip-grad-btn);
    color: #212529;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1.15rem;
    box-shadow: 0 2px 8px rgba(255,193,7,.4);
}
.navbar-dark .nav-link {
    font-size: .95rem;
    padding: .5rem .8rem;
    border-radius: .5rem;
    transition: background .2s, color .2s;
}
.navbar-dark .nav-link:hover { background: rgba(255,255,255,.08); color: #fff !important; }
.navbar-dark .nav-link.active { color: var(--knip-accent) !important; font-weight: 600; }
.navbar .dropdown-menu {
    box-shadow: var(--knip-shadow);
    border-radius: .6rem;
    border: 1px solid var(--knip-card-border);
    padding: .4rem;
}
.navbar .dropdown-item { border-radius: .4rem; padding: .5rem .8rem; }
.navbar .dropdown-item:hover { background: rgba(255,193,7,.12); }

/* ===== 5. 公告条 ===== */
.announcement-bar {
    background: rgba(255,193,7,.07);
    border-bottom: 1px solid rgba(255,193,7,.22);
}
.announcement-bar .badge { flex-shrink: 0; }

/* ===== 6. 页面标题区 ===== */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: .75rem;
    margin-bottom: 1.5rem;
}
.page-header h2 {
    margin: 0;
    font-size: 1.45rem;
    font-weight: 800;
    letter-spacing: .2px;
}
.page-header h2 i { color: var(--knip-accent); margin-right: .35rem; flex-shrink: 0; }
.page-header h2 { min-width: 0; display: flex; align-items: center; }
.page-header .header-actions { display: flex; gap: .5rem; flex-wrap: wrap; }

/* ===== 7. 卡片统一(现代) ===== */
.card {
    border: 1px solid var(--knip-card-border);
    border-radius: var(--knip-radius);
    box-shadow: var(--knip-shadow);
    transition: box-shadow .2s ease;
}
.card-header {
    background: #fff;
    border-bottom: 1px solid var(--knip-card-border);
    border-radius: calc(var(--knip-radius) - 1px) calc(var(--knip-radius) - 1px) 0 0 !important;
    padding: .9rem 1.25rem;
    font-weight: 600;
}
.card-header h4, .card-header h5, .card-header h6 { margin: 0; }

/* 长文本/说明文字排版：行高、段落间距、列表缩进清晰（桌面+移动端均生效） */
.card-body p,
.card-body li,
.card-body .form-text,
.card-body .alert,
.alert,
.form-text,
.work-content {
    line-height: 1.7;
    overflow-wrap: break-word;
    word-break: break-word;
}
.card-body p + p { margin-top: .5rem; }
.card-body ul, .card-body ol { padding-left: 1.25rem; }
.card-body ul li, .card-body ol li { margin-bottom: .3rem; }
.card-body h4, .card-body h5, .card-body h6 { line-height: 1.4; margin-bottom: .5rem; }
.card-body .border.rounded.p-3, .card-body .border.rounded-3.p-3 {
    line-height: 1.7;
    white-space: normal;
    overflow-wrap: break-word;
    word-break: break-word;
}

/* 工具/作品/分类卡片(网格卡)——图标色块 + 悬浮 */
.category-card, .tool-card, .work-card {
    transition: transform .22s ease, box-shadow .22s ease;
    border: 1px solid var(--knip-card-border);
    border-radius: var(--knip-radius);
    box-shadow: var(--knip-shadow);
    overflow: hidden;
    background: #fff;
}
.category-card:hover, .tool-card:hover, .work-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--knip-shadow-hover);
}
/* 图标圆形色块 */
.tool-card .icon-badge,
.category-card .icon-badge,
.work-card .icon-badge {
    width: 56px;
    height: 56px;
    margin: 0 auto .75rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
}
.tool-card .icon-badge.bg-soft-success { background: rgba(40,167,69,.12); color: #28a745; }
.tool-card .icon-badge.bg-soft-primary { background: rgba(13,110,253,.12); color: #0d6efd; }
.category-card .icon-badge.bg-soft-warning { background: rgba(255,193,7,.16); color: #e6a700; }
.work-card .icon-badge.bg-soft-primary { background: rgba(13,110,253,.12); color: #0d6efd; }
.tool-card .card-body, .category-card .card-body { padding: 1.25rem 1rem 1.15rem; }
.tool-card .card-body h5, .tool-card .card-body h6,
.category-card .card-body h5, .work-card .card-body h6 {
    font-weight: 700;
    overflow-wrap: break-word;
    word-break: break-word;
}
.tool-card .card-body p, .work-card .card-body p,
.tool-card .card-body small, .work-card .card-body small {
    overflow-wrap: break-word;
    word-break: break-word;
    line-height: 1.5;
}
.work-card .card-img-top { border-radius: calc(var(--knip-radius) - 1px) calc(var(--knip-radius) - 1px) 0 0; }

/* ===== 8. 按钮(渐变主按钮) ===== */
.btn { border-radius: .55rem; font-weight: 500; }
.btn-warning {
    background: var(--knip-grad-btn);
    border: none;
    color: #212529;
    box-shadow: 0 2px 8px rgba(255,180,20,.35);
}
.btn-warning:hover { filter: brightness(1.05); color: #212529; }
.btn-outline-warning { color: #d99a00; border-color: #ffc107; }
.btn-outline-warning:hover { background: rgba(255,193,7,.12); color: #b07f00; border-color: #ffc107; }
.btn-sm { border-radius: .5rem; }

/* ===== 9. 表单 ===== */
.form-control, .form-select { border-radius: .55rem; border-color: #d8dbe8; }
.form-control:focus, .form-select:focus { border-color: var(--knip-accent); box-shadow: 0 0 0 .2rem rgba(255,193,7,.15); }
/* 单行输入框:内容过长时支持左右滑动查看(不裁剪丢失) */
input.form-control[type="text"],
input.form-control[type="email"],
input.form-control[type="url"],
input.form-control[type="search"],
input.form-control[type="number"],
input.form-control[type="password"],
input.form-control[type="tel"] {
    overflow-x: auto;
    white-space: nowrap;
    text-overflow: clip;
    -webkit-overflow-scrolling: touch;
}
/* textarea:长行可横向滚动,不撑破容器 */
textarea.form-control {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    tab-size: 4;
}
/* 通用:表单控件永不超出容器 */
.form-control, .form-select { max-width: 100%; }
.form-label { font-weight: 600; }

/* ===== 10. 表格 ===== */
.table { --bs-table-bg: transparent; }
.table thead th {
    white-space: nowrap;
    font-weight: 600;
    color: #495057;
    background: #f8f9fd;
    border-bottom-width: 1px;
}
.table td { vertical-align: middle; overflow-wrap: break-word; word-break: break-word; }
.table-hover tbody tr:hover { background: rgba(255,193,7,.05); }

/* ===== 11. 徽章 ===== */
.badge { font-weight: 600; border-radius: .4rem; }

/* ===== 12. 分页 ===== */
.pagination .page-link { border-radius: .5rem; margin: 0 2px; border: 1px solid var(--knip-card-border); color: #495057; }
.pagination .page-item.active .page-link { background: var(--knip-accent); border-color: var(--knip-accent); color: #212529; font-weight: 600; }
.pagination .page-item.disabled .page-link { background: #fff; }

/* ===== 13. Hero 区(现代化) ===== */
.hero-section {
    background: var(--knip-grad-hero);
    color: #fff;
    min-height: 340px;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
}
/* 装饰光晕 */
.hero-section::before {
    content: "";
    position: absolute;
    width: 480px;
    height: 480px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(255,193,7,.14) 0%, transparent 70%);
    top: -160px;
    right: -80px;
    pointer-events: none;
}
.hero-section::after {
    content: "";
    position: absolute;
    width: 380px;
    height: 380px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(13,110,253,.12) 0%, transparent 70%);
    bottom: -140px;
    left: -60px;
    pointer-events: none;
}
.hero-section .container { position: relative; z-index: 1; }
.hero-section h1 { font-size: 2.7rem; font-weight: 800; letter-spacing: .5px; }
.hero-section .lead { color: rgba(255,255,255,.75); font-size: 1.1rem; }
.stat-card {
    transition: transform .2s, box-shadow .2s;
    backdrop-filter: blur(6px);
    background: rgba(255,255,255,.08) !important;
    border: 1px solid rgba(255,255,255,.14);
    border-radius: var(--knip-radius);
}
.stat-card:hover { transform: translateY(-3px); box-shadow: 0 8px 24px rgba(0,0,0,.3); }
.stat-card h3 { font-weight: 800; }

/* ===== 14. AI 创作推广区 ===== */
.bg-gradient-ai { background: linear-gradient(135deg, #2d1b69 0%, #11998e 100%); }

/* ===== 15. 作品内容排版 ===== */
.work-content { line-height: 1.8; font-size: 1.05rem; overflow-wrap: break-word; word-break: break-word; }

/* ===== 16. 预览区 ===== */
.work-preview-frame, .tool-preview-frame {
    width: 100% !important;
    display: block;
    background: #fff;
    border: 0;
}
.tool-card .btn-group .btn { white-space: nowrap; }
.tool-code textarea, .detail-view textarea { font-family: ui-monospace, SFMono-Regular, Consolas, "Courier New", monospace; }

/* 工具渲染容器:防工具内容撑破屏幕 + 内容居中 */
#tool-container {
    max-width: 100%;
    overflow-x: hidden;
    margin-left: auto;
    margin-right: auto;
}
#tool-container img, #tool-container video, #tool-container canvas,
#tool-container svg, #tool-container table, #tool-container pre,
#tool-container iframe, #tool-container textarea {
    max-width: 100%;
}
#tool-container * {
    overflow-wrap: break-word;
    word-break: break-word;
}

/* 代码区:默认自动换行(手机友好),可用换行开关切换横向滚动 */
.detail-view, .tool-code, #zoom-code {
    max-width: 100%;
    overflow: hidden;
}
.detail-view textarea, .tool-code textarea, #zoom-textarea,
.detail-view pre, .tool-code pre {
    max-width: 100% !important;
    width: 100% !important;
    white-space: pre-wrap;
    overflow-wrap: break-word;
    word-break: break-all;
    overflow-x: hidden;
    tab-size: 4;
}
/* 代码换行开关按钮 */
.code-wrap-toggle, .zoom-wrap-toggle {
    white-space: nowrap;
}
/* 桌面端(≥992px):代码区默认横向滚动,更适合看长行 */
@media (min-width: 992px) {
    .detail-view textarea, .tool-code textarea, #zoom-textarea {
        white-space: pre;
        overflow-wrap: normal;
        word-break: normal;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }
}

/* 预览/HTML/Python 切换标签:等宽对齐 */
.nav-tabs.detail-tabs, ul.nav.nav-tabs {
    display: flex;
    flex-wrap: wrap;
}
.nav-tabs .nav-item { flex: 1 1 0; min-width: 0; }
.nav-tabs .nav-link {
    width: 100%;
    text-align: center;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    border: 1px solid transparent;
    border-radius: .5rem .5rem 0 0;
}
.nav-tabs .nav-link.active {
    border-color: #dee2e6 #dee2e6 #fff;
    font-weight: 600;
}
/* 代码区小标签(HTML/Python 两个)也等宽 */
.nav-tabs-sm .nav-item { flex: 1 1 0; }
.nav-tabs-sm .nav-link { text-align: center; }

/* ===== 17. 个人中心侧边栏 ===== */
.user-menu-mobile { border-radius: var(--knip-radius); overflow: hidden; }
.list-group-item { border-color: var(--knip-card-border); }
.list-group-item.active { background: var(--knip-accent); border-color: var(--knip-accent); color: #212529; font-weight: 600; }

/* ===== 18. Footer ===== */
footer {
    margin-top: 3rem;
    background: linear-gradient(180deg, #0f0f23 0%, #0a0a18 100%);
}
footer a { transition: color .15s; }
footer a:hover { color: #fff !important; text-decoration: underline !important; }
/* 深色底上的文字提亮：链接与版权行避免太浅看不清 */
footer a.text-muted { color: #c9cde0 !important; }
footer a.text-muted:hover { color: #fff !important; }
footer .text-muted,
footer small.text-muted { color: #c9cde0 !important; }

/* ===== 滚动公告条（首页 slogan + 公告）===== */
.announce-marquee {
    overflow: hidden;
    white-space: nowrap;
    background: linear-gradient(90deg, #0f0f23 0%, #1a1a3e 100%);
}
.marquee-track {
    display: inline-block;
    white-space: nowrap;
    /* track 只有内容一份；从屏幕右边缘外进入，向左滚过自身宽度(-100%)即循环，每轮每条公告只出现一遍 */
    animation: marquee-scroll 40s linear infinite;
    will-change: transform;
}
.marquee-track:hover { animation-play-state: paused; }
/* 滚动一遍：滚到末尾后停在最后一条（forwards），不再循环；终点由 JS 计算内容宽度 */
.marquee-track.marquee-once {
    animation-fill-mode: forwards;
    animation-iteration-count: 1;
    animation-name: marquee-once;
    --marquee-once-end: -100vw;   /* 默认值，JS 会覆盖为 -(内容宽) */
}
.marquee-item {
    display: inline-block;
    padding: .15rem 1.5rem;
    font-size: .82rem;
    color: #c9cde0;
    vertical-align: middle;
}
.marquee-item a { color: #c9cde0; }
@keyframes marquee-scroll {
    0%   { transform: translateX(100vw); }
    100% { transform: translateX(-100%); }
}
@keyframes marquee-once {
    0%   { transform: translateX(100vw); }
    100% { transform: translateX(var(--marquee-once-end)); }
}
/* 静止显示：多公告横排，超宽可横向滑动 */
.marquee-static {
    scrollbar-width: thin;
    scrollbar-color: rgba(255,255,255,.3) transparent;
}
.marquee-static::-webkit-scrollbar { height: 4px; }
.marquee-static::-webkit-scrollbar-thumb { background: rgba(255,255,255,.3); border-radius: 2px; }

/* ===== 19. 管理后台(桌面) ===== */
.admin-sidebar {
    width: 240px;
    min-height: 100vh;
    background: linear-gradient(180deg, #0f0f23 0%, #1a1a3e 100%);
    color: #fff;
    flex-shrink: 0;
}
.admin-sidebar .nav-link {
    padding: .6rem 1rem;
    border-radius: .45rem;
    margin-bottom: .2rem;
    transition: background .2s;
    font-size: .92rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.admin-sidebar .nav-link:hover { background: rgba(255,255,255,.10); }
.admin-sidebar .nav-link.active { background: rgba(255,193,7,.22); color: var(--knip-accent) !important; }
.admin-main { background: var(--knip-bg); min-height: 100vh; }
.admin-main .container-fluid { max-width: 1400px; }

/* ===== 20. 放大模态框(全屏) ===== */
.modal-fullscreen .modal-header { flex-wrap: wrap; gap: .5rem; }
#zoom-frame { background: #fff; }
#zoom-textarea { resize: none; }

/* ===== 21. 空状态 ===== */
.empty-state { padding: 3.5rem 1rem; text-align: center; color: #6c757d; }
.empty-state i { display: block; font-size: 3rem; margin-bottom: .75rem; opacity: .5; }

/* ===== 22. 聊天区(AI 创作) ===== */
#chat-messages { background: #f0f2fa; }
.ai-msg .bubble { border-radius: .9rem; }

/* ================================================================
   移动端适配(在桌面设计系统之上)
   ================================================================ */

/* ── 平板及以下 (≤992px) ─────────────────────────────────────── */
@media (max-width: 991.98px) {
    html, body { overflow-x: hidden; }
    .container, .container-fluid, .row, [class*="col-"] { max-width: 100%; }
    img, iframe, video, canvas, svg, table, pre, code, textarea { max-width: 100%; }
    .card { width: 100%; }
    .hero-section h1 { font-size: 2.1rem; }
}

/* ── 手机及以下 (≤576px) ─────────────────────────────────────── */
@media (max-width: 575.98px) {

    /* 1. 全局防溢出 + 换行 */
    html, body { overflow-x: hidden; width: 100%; }
    body, p, div, span, a, h1, h2, h3, h4, h5, h6, li, td, th, small, strong, em, label {
        overflow-wrap: break-word;
        word-break: break-word;
    }
    /* 容器与网格:让 Bootstrap 默认 gutter 生效(container 12 + row -12 + col 12 = 对称) */
    .container, .container-fluid {
        padding-left: 12px !important;
        padding-right: 12px !important;
        max-width: 100% !important;
    }
    .row, .row.g-3, .row.g-4 {
        margin-left: 0 !important;
        margin-right: 0 !important;
    }
    .row > [class*="col-"],
    .row.g-3 > [class*="col-"],
    .row.g-4 > [class*="col-"] {
        padding-left: 12px !important;
        padding-right: 12px !important;
        max-width: 100%;
    }
    /* 无 col 类的直接子元素(如工具详情 col-lg-8)也对称 */
    .row > * { min-width: 0; }
    .card { width: 100%; margin-left: auto; margin-right: auto; }

    /* 3. 网格卡:图标色块 + 标题不挤压 */
    .tool-card .card-body, .work-card .card-body, .category-card .card-body { text-align: center; padding: 1rem .75rem; }
    .tool-card .icon-badge, .category-card .icon-badge, .work-card .icon-badge {
        width: 46px; height: 46px; font-size: 1.3rem; margin-bottom: .5rem;
    }
    .tool-card .card-body h5, .tool-card .card-body h6,
    .work-card .card-body h6, .category-card .card-body h5 { font-size: 1rem; margin-bottom: .25rem; }
    .tool-card .card-body p, .work-card .card-body p, .category-card .card-body p,
    .tool-card .card-body small, .work-card .card-body small, .category-card .card-body small {
        font-size: .8rem; line-height: 1.4;
    }

    /* 4. 按钮:触控友好 + 文字不截断 */
    .btn { min-height: 40px; white-space: normal; }
    .btn-sm { min-height: 36px; }

    /* 5. flex 两端对齐:窄屏换行不挤压 */
    .d-flex.justify-content-between,
    .d-flex.justify-content-around,
    .d-flex.justify-content-evenly { flex-wrap: wrap; gap: .25rem .5rem; }
    .d-flex.justify-content-between > *,
    .d-flex.justify-content-around > *,
    .d-flex.justify-content-evenly > * { flex: 0 1 auto; }

    /* 5a. 长文本排版（公告/工单/通知/帮助/作品描述等段落文字）：
           加大行高与段落间距，列表缩进清晰，避免手机端堆成一团 */
    .card-body p,
    .card-body div,
    .card-body li,
    .work-content,
    .alert p,
    .alert div,
    .alert li {
        line-height: 1.75;
    }
    .card-body p + p { margin-top: .6rem; }
    .card-body ul, .card-body ol {
        padding-left: 1.25rem;
        margin-bottom: .6rem;
    }
    .card-body ul li, .card-body ol li { margin-bottom: .35rem; }
    .card-body h4, .card-body h5, .card-body h6 {
        line-height: 1.4;
        margin-bottom: .5rem;
        margin-top: .25rem;
    }
    /* 工单/回复等带 linebreaks 的正文容器 */
    .card-body .border.rounded.p-3,
    .card-body .border.rounded-3.p-3 {
        line-height: 1.7;
        white-space: normal;
        overflow-wrap: break-word;
        word-break: break-word;
    }
    /* 长文本容器内段落间距 */
    .card-body .border.rounded.p-3 p,
    .card-body .border.rounded-3.p-3 p,
    .card-body .border.rounded.p-3 div,
    .card-body .border.rounded-3.p-3 div { margin-bottom: .4rem; }
    /* 公告卡片标题与日期不再同行挤压 */
    .card-body .d-flex.justify-content-between .card-title,
    .card-body .d-flex.justify-content-between h5 {
        min-width: 0;
        margin-right: .5rem;
    }
    /* 详情页头部信息行（作者/时间/状态）允许换行且有间距 */
    .card-header .d-flex.justify-content-between,
    .card-header .d-flex.align-items-center.justify-content-between {
        flex-wrap: wrap;
        row-gap: .4rem;
    }
    .card-header h5, .card-header h6 { min-width: 0; }
    .card-header form.d-inline { margin-top: .2rem; }

    /* 5b. 通用"横滑行":任何按钮/标签/信息行窄屏保持一行可左右滑动,不换行不挤压
        用法:在容器上加 class="scroll-x"(配合 flex 或 d-flex) */
    .scroll-x,
    .scroll-x .d-flex,
    .tool-card .d-flex.gap-1.flex-wrap,
    .tool-card .d-flex.gap-2.flex-wrap,
    .tool-card .d-flex.justify-content-center.gap-1,
    .tool-card .d-flex.justify-content-center.gap-2,
    .work-card .d-flex.flex-wrap,
    .category-card .d-flex.flex-wrap,
    .btn-group-nowrap,
    .tool-actions,
    .card-header .d-flex.align-items-center.flex-wrap,
    .modal-header .d-flex.align-items-center.flex-wrap {
        flex-wrap: nowrap !important;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        padding-bottom: 2px;
        max-width: 100%;
    }
    .scroll-x > *,
    .scroll-x .d-flex > *,
    .tool-card .d-flex.gap-1.flex-wrap > *,
    .tool-card .d-flex.gap-2.flex-wrap > *,
    .tool-card .d-flex.justify-content-center.gap-1 > *,
    .tool-card .d-flex.justify-content-center.gap-2 > *,
    .tool-actions > *,
    .card-header .d-flex.align-items-center.flex-wrap > *,
    .modal-header .d-flex.align-items-center.flex-wrap > * {
        flex: 0 0 auto;
        white-space: nowrap;
    }
    /* 工具预览 iframe 内部:整页超宽可左右滚动(用户可滑动查看完整工具) */
    iframe.work-preview-frame, iframe.tool-preview-frame { overflow-x: auto; }

    /* 6. 分类/筛选按钮:按内容宽度排列,一行可横滑,不拉伸不换行 */
    .mb-4.d-flex.flex-wrap.gap-2,
    .mb-3.d-flex.flex-wrap.gap-2 {
        flex-wrap: nowrap !important;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        padding-bottom: 3px;
    }
    .mb-4.d-flex.flex-wrap.gap-2 .btn,
    .mb-3.d-flex.flex-wrap.gap-2 .btn {
        flex: 0 0 auto; text-align: center; white-space: nowrap;
        padding-left: .75rem; padding-right: .75rem; font-size: .85rem;
    }
    .mb-3.d-flex.align-items-center.gap-2 .btn { flex: 0 0 auto; }

    /* 7. 手机端个人中心快捷菜单:网格每行2个 */
    .user-center-grid { grid-template-columns: repeat(2, 1fr) !important; gap: .5rem; }
    .user-center-grid .btn {
        display: inline-flex; align-items: center; justify-content: center; gap: 4px;
        white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
        font-size: .85rem; padding: .45rem .3rem;
    }

    /* 8. 用户下拉菜单:限高滚动 + 不超宽 */
    .navbar .dropdown-menu {
        max-height: 70vh; overflow-y: auto; max-width: calc(100vw - 24px);
    }
    .navbar .badge { vertical-align: middle; }

    /* 8b. 个人中心菜单:手机端等宽网格(每行2个) */
    .user-menu-mobile {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: .5rem;
        padding: .75rem;
    }
    .user-menu-mobile .list-group-item {
        border: 1px solid var(--knip-card-border);
        border-radius: .5rem;
        margin: 0;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 4px;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
        font-size: .88rem;
        padding: .5rem .4rem;
        text-align: center;
    }
    .user-menu-mobile .list-group-item.active {
        background: var(--knip-accent);
        border-color: var(--knip-accent);
        color: #212529;
        font-weight: 600;
    }

    /* 9. 表格:横向滚动不撑破 */
    .table { display: block; width: 100%; overflow-x: auto; -webkit-overflow-scrolling: touch; font-size: .85rem; }
    .table-responsive { -webkit-overflow-scrolling: touch; }

    /* 10. 长内容/代码可换行 */
    code, pre, .font-monospace, .alert, .card-body { overflow-wrap: break-word; word-break: break-word; }
    textarea.form-control { white-space: pre-wrap; overflow-wrap: break-word; word-break: break-all; tab-size: 4; }

    /* 11. 定价/积分文字不超屏 */
    .card-header .badge.fs-6,
    .card-header span[class*="text-end"] {
        max-width: 100%; white-space: normal !important; word-break: break-word; line-height: 1.5;
    }

    /* 12. 预览 iframe */
    .work-preview-frame, .tool-preview-frame { width: 100% !important; display: block; height: 360px !important; }

    /* 13. 放大模态框:全屏锁定,内容不偏移不拖出 */
    .modal-fullscreen { padding: 0 !important; }
    .modal-fullscreen .modal-dialog { width: 100%; max-width: 100%; height: 100%; margin: 0; }
    .modal-fullscreen .modal-content { width: 100%; max-width: 100%; height: 100%; border: none; border-radius: 0; overflow: hidden; }
    .modal-fullscreen .modal-body { padding: 0; overflow: hidden !important; }
    .modal-open { overflow: hidden !important; }
    body.modal-open { position: fixed; inset: 0; }
    #zoom-frame { width: 100% !important; max-width: 100%; min-height: 0; border: 0; overscroll-behavior: contain; }
    #zoom-code { min-height: 0; }
    #zoom-textarea { height: 100% !important; min-height: 0; }

    /* 14. Hero 区 */
    .hero-section { min-height: 230px; }
    .hero-section h1 { font-size: 1.75rem; }
    .hero-section .lead { font-size: .95rem; }

    /* 15. 统计卡片紧凑 */
    .stat-card h3 { font-size: 1.3rem; }
    .stat-card p, .stat-card small { font-size: .8rem; }

    /* 16. 输入框/按钮组不超容器 */
    .input-group, .btn-group { max-width: 100%; }

    /* 17. 管理后台:侧边栏底部横条 */
    .admin-sidebar {
        position: fixed; left: 0; right: 0; bottom: 0;
        width: 100% !important; height: 54px; min-height: 0;
        display: flex; align-items: center; justify-content: space-around;
        flex-direction: row !important; z-index: 1050; padding: 0 !important;
    }
    .admin-sidebar .p-3,
    .admin-sidebar .d-flex {
        display: flex !important; flex-direction: row !important;
        align-items: center; justify-content: space-around;
        width: 100%; padding: 0 !important;
    }
    .admin-sidebar .nav-link { font-size: 0; padding: .5rem .4rem !important; flex: 1; text-align: center; margin: 0 !important; }
    .admin-sidebar .nav-link i { font-size: 1.15rem !important; margin: 0 !important; }
    .admin-sidebar .fs-5 { display: none; }
    .admin-main { padding-bottom: 58px; }
    .admin-main .container-fluid { padding-left: .75rem !important; padding-right: .75rem !important; }

    /* 18. 页面纵向间距收紧 */
    .container.py-4 { padding-top: 1rem !important; padding-bottom: 1rem !important; }
    .py-5 { padding-top: 2rem !important; padding-bottom: 2rem !important; }

    /* 19. 卡片不悬停 */
    .category-card:hover, .tool-card:hover, .work-card:hover { transform: none; box-shadow: var(--knip-shadow); }
}

/* ── 小平板 (577px–768px) ────────────────────────────────────── */
@media (min-width: 576px) and (max-width: 767.98px) {
    .container { padding-left: 12px !important; padding-right: 12px !important; }
    .row.g-3, .row.g-4 { margin-left: 0 !important; margin-right: 0 !important; }
    .row.g-3 > [class*="col-"], .row.g-4 > [class*="col-"] { padding-left: 12px !important; padding-right: 12px !important; }
}