/* ============================================================================
 * EPUB 编辑器  /tools/epub-editor
 * 卡片式工作台：导入态（拖拽区 / 卡片）→ 工作台（章节目录 + 编辑区 + 预览）
 * 配色全部走站点 CSS 变量，深色 / 浅色主题自动适配。
 * ========================================================================== */

/* ---------- 整屏布局：保留左侧导航，主体占满整个电脑端屏幕 ---------- */
body.page-epub-editor-full .app,
body.page-epub-editor-full .main-content {
    max-width: 100%;
    width: 100%;
}

.ee-page {
    max-width: 100%;
    margin: 0;
    padding: 18px 20px 40px;
    box-sizing: border-box;
    color: var(--text-primary);
}

/* hidden 必须压过 display，否则面板/弹层关不掉（本仓库老坑） */
.ee-page [hidden],
.ee-mask[hidden],
.ee-toast[hidden] { display: none !important; }
.ee-hidden { display: none !important; }

/* ===================== 通用卡片 ===================== */
.ee-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 14px;
    padding: 18px 20px;
    margin-bottom: 16px;
}
.ee-card-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    margin-bottom: 12px;
}
.ee-card-head.mt { margin-top: 22px; }
.ee-card-title {
    display: flex;
    align-items: center;
    gap: 8px;
    margin: 0;
    font-size: 15.5px;
    font-weight: 700;
    color: var(--text-primary);
}
.ee-card-title svg { color: var(--accent); flex: 0 0 auto; }
.ee-pane-tip {
    margin: 0 0 12px;
    font-size: 12.5px;
    line-height: 1.7;
    color: var(--text-secondary);
}
.ee-pane-tip b { color: var(--text-primary); }
.ee-empty-hint {
    margin: 0;
    padding: 18px 6px;
    font-size: 12.5px;
    line-height: 1.8;
    color: var(--text-secondary);
    text-align: center;
}

/* ===================== 按钮 ===================== */
.ee-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 8px 15px;
    font-size: 13.5px;
    font-weight: 600;
    font-family: inherit;
    color: var(--text-primary);
    background: var(--bg-hover);
    border: 1px solid var(--border-color);
    border-radius: 9px;
    cursor: pointer;
    transition: background .15s, border-color .15s, color .15s, opacity .15s;
}
.ee-btn:hover:not(:disabled) { border-color: var(--accent); color: var(--accent); }
.ee-btn:disabled { opacity: .5; cursor: not-allowed; }
.ee-btn.primary {
    color: #fff;
    background: var(--accent);
    border-color: var(--accent);
}
.ee-btn.primary:hover:not(:disabled) { background: var(--accent-hover); border-color: var(--accent-hover); color: #fff; }
.ee-btn.ghost { background: transparent; }
.ee-btn.ghost.danger:hover:not(:disabled) { color: var(--danger); border-color: var(--danger); }
.ee-btn.tiny { padding: 5px 10px; font-size: 12.5px; border-radius: 7px; }
.ee-btn.big {
    flex-direction: column;
    align-items: flex-start;
    gap: 3px;
    padding: 14px 16px;
    text-align: left;
}
.ee-btn:focus-visible,
.ee-icon-btn:focus-visible,
.ee-tab:focus-visible,
.ee-mode-btn:focus-visible,
.ee-toolbar button:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

.ee-icon-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    font-size: 15px;
    line-height: 1;
    color: var(--text-secondary);
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    cursor: pointer;
    transition: color .15s, border-color .15s, background .15s;
}
.ee-icon-btn:hover { color: var(--danger); border-color: var(--danger); }

/* ===================== 导入态 ===================== */
.ee-gate { max-width: 1000px; margin: 0 auto; }

.ee-hero {
    text-align: center;
    padding: 26px 20px 30px;
    margin: 0 auto 4px;
    border-radius: 16px;
    background: linear-gradient(180deg, color-mix(in srgb, var(--accent) 9%, transparent), transparent);
}
.ee-hero-title {
    margin: 0 0 8px;
    font-size: 27px;
    font-weight: 800;
    letter-spacing: .3px;
    color: var(--text-primary);
}
.ee-hero-sub {
    margin: 0 0 14px;
    font-size: 14px;
    color: var(--text-secondary);
}
.ee-hero-tags { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; }
.ee-tag {
    padding: 4px 11px;
    font-size: 12px;
    color: var(--accent);
    background: color-mix(in srgb, var(--accent) 12%, transparent);
    border: 1px solid color-mix(in srgb, var(--accent) 28%, transparent);
    border-radius: 999px;
}

/* 拖拽区 */
.ee-drop {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
    padding: 40px 20px;
    text-align: center;
    cursor: pointer;
    background: color-mix(in srgb, var(--bg-hover) 45%, transparent);
    border: 2px dashed var(--border-color);
    border-radius: 14px;
    transition: border-color .18s, background .18s;
}
.ee-drop:hover, .ee-drop.over {
    border-color: var(--accent);
    background: color-mix(in srgb, var(--accent) 8%, transparent);
}
.ee-drop.over { border-style: solid; }
.ee-drop svg { color: var(--text-secondary); margin-bottom: 2px; }
.ee-drop-title { margin: 0; font-size: 14.5px; font-weight: 600; color: var(--text-primary); }
.ee-drop-sub { margin: 0; font-size: 12.5px; color: var(--text-secondary); }
.ee-chip {
    margin-top: 7px;
    padding: 2px 7px;
    font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
    font-size: 10.5px;
    letter-spacing: .5px;
    color: var(--text-secondary);
    background: var(--bg-hover);
    border-radius: 5px;
}

.ee-or {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
    margin-top: 14px;
}
.ee-or-tip { font-size: 12.5px; color: var(--text-secondary); }

.ee-newmeta {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-top: 16px;
    padding-top: 15px;
    border-top: 1px dashed var(--border-color);
}
.ee-nm-field { display: flex; flex-direction: column; gap: 5px; }
.ee-nm-field > span { font-size: 12px; font-weight: 600; color: var(--text-secondary); }
.ee-nm-field input {
    padding: 9px 11px;
    font-size: 14px;
    font-family: inherit;
    color: var(--text-primary);
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
}
.ee-nm-field input:focus { outline: none; border-color: var(--accent); }

.ee-tips, .ee-feats { margin: 0; padding-left: 18px; }
.ee-tips li, .ee-feats li {
    margin-bottom: 7px;
    font-size: 12.8px;
    line-height: 1.75;
    color: var(--text-secondary);
}
.ee-tips li::marker { color: var(--accent); }
.ee-feats b { color: var(--text-primary); }

/* ===================== 顶部条与页签 ===================== */
.ee-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    flex-wrap: wrap;
    padding: 12px 16px;
    margin-bottom: 12px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, .05);
}
.ee-bar-left { display: flex; align-items: center; gap: 11px; min-width: 0; }
.ee-bar-ico { font-size: 22px; line-height: 1; }
.ee-bar-info { min-width: 0; }
.ee-book-title {
    font-size: 15.5px;
    font-weight: 700;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.ee-book-stat { margin-top: 2px; font-size: 12px; color: var(--text-secondary); }
.ee-bar-right { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }

.ee-tabs {
    display: flex;
    gap: 4px;
    margin-bottom: 14px;
    padding: 4px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 11px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, .05);
    overflow-x: auto;
}
.ee-tab {
    flex: 1 1 auto;
    min-width: 104px;
    padding: 9px 14px;
    font-size: 13.5px;
    font-weight: 600;
    font-family: inherit;
    white-space: nowrap;
    color: var(--text-secondary);
    background: transparent;
    border: 0;
    border-radius: 8px;
    cursor: pointer;
    transition: background .15s, color .15s;
}
.ee-tab:hover { color: var(--text-primary); }
.ee-tab.active {
    color: #fff;
    background: var(--accent);
    box-shadow: 0 2px 8px color-mix(in srgb, var(--accent) 38%, transparent);
}

/* ===================== 元数据表单 ===================== */
.ee-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; align-items: start; }
.ee-grid .ee-card { margin-bottom: 0; }
.ee-form { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.ee-field { display: flex; flex-direction: column; gap: 5px; }
.ee-field.full { grid-column: 1 / -1; }
.ee-field > span { font-size: 12px; font-weight: 600; color: var(--text-secondary); }
.ee-field input, .ee-field textarea {
    width: 100%;
    box-sizing: border-box;
    padding: 9px 11px;
    font-size: 14px;
    font-family: inherit;
    color: var(--text-primary);
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    resize: vertical;
}
.ee-field input:focus, .ee-field textarea:focus { outline: none; border-color: var(--accent); }

.ee-authors { display: flex; flex-direction: column; gap: 8px; }
.ee-author-row { display: grid; grid-template-columns: 1fr 96px 32px; gap: 7px; align-items: center; }
.ee-author-name, .ee-author-role {
    padding: 8px 10px;
    font-size: 13.5px;
    font-family: inherit;
    color: var(--text-primary);
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    min-width: 0;
}
.ee-author-name:focus, .ee-author-role:focus { outline: none; border-color: var(--accent); }

.ee-cover {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 168px;
    padding: 12px;
    background: var(--bg-primary);
    border: 1px dashed var(--border-color);
    border-radius: 11px;
}
.ee-cover img { max-width: 100%; max-height: 210px; border-radius: 6px; box-shadow: 0 4px 16px rgba(0, 0, 0, .18); }
.ee-cover-none { font-size: 12.5px; color: var(--text-secondary); }
.ee-cover-ops { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 11px; }

/* ===================== 工作台：目录 + 编辑区 ===================== */
.ee-pane-content { padding: 0; }
.ee-work { display: grid; grid-template-columns: 268px 1fr; gap: 14px; align-items: start; }

.ee-side {
    display: flex;
    flex-direction: column;
    position: sticky;
    top: 76px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, .05);
    overflow: hidden;
}
.ee-side-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 11px 13px;
    font-size: 13px;
    font-weight: 700;
    color: var(--text-primary);
    border-bottom: 1px solid var(--border-color);
}
.ee-chap-list { flex: 1; max-height: 58vh; overflow-y: auto; padding: 6px; }
.ee-chap {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 9px;
    margin-bottom: 3px;
    border: 1px solid transparent;
    border-radius: 8px;
    cursor: pointer;
    transition: background .13s, border-color .13s;
}
.ee-chap:hover { background: var(--bg-hover); }
.ee-chap.active {
    background: color-mix(in srgb, var(--accent) 13%, transparent);
    border-color: color-mix(in srgb, var(--accent) 42%, transparent);
}
.ee-chap.dragging { opacity: .45; }
.ee-chap.drop-hint { border-color: var(--accent); border-style: dashed; }
.ee-chap-no {
    flex: 0 0 auto;
    width: 21px; height: 21px;
    display: flex; align-items: center; justify-content: center;
    font-size: 11px; font-weight: 700;
    color: var(--text-secondary);
    background: var(--bg-hover);
    border-radius: 6px;
}
.ee-chap.active .ee-chap-no { color: #fff; background: var(--accent); }
.ee-chap-name {
    flex: 1 1 auto;
    min-width: 0;
    font-size: 13px;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.ee-chap-words { flex: 0 0 auto; font-size: 11px; color: var(--text-secondary); }
.ee-side-foot {
    display: flex;
    gap: 6px;
    padding: 10px;
    border-top: 1px solid var(--border-color);
}
.ee-side-foot .ee-btn { flex: 1 1 auto; }

.ee-main { min-width: 0; display: flex; flex-direction: column; gap: 10px; }
.ee-main-head { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.ee-chap-name-input {
    flex: 1 1 220px;
    min-width: 0;
    padding: 9px 12px;
    font-size: 15px;
    font-weight: 700;
    font-family: inherit;
    color: var(--text-primary);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 9px;
}
.ee-chap-name-input:focus { outline: none; border-color: var(--accent); }
.ee-mode-seg { display: flex; gap: 2px; padding: 3px; background: var(--bg-secondary); border: 1px solid var(--border-color); border-radius: 9px; }
.ee-mode-btn {
    padding: 6px 14px;
    font-size: 12.5px;
    font-weight: 600;
    font-family: inherit;
    color: var(--text-secondary);
    background: transparent;
    border: 0;
    border-radius: 7px;
    cursor: pointer;
}
.ee-mode-btn.active { color: #fff; background: var(--accent); }

/* 工具栏 */
.ee-toolbar {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 3px;
    padding: 7px 9px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 10px;
}
.ee-toolbar.disabled { opacity: .45; pointer-events: none; }
.ee-toolbar button {
    min-width: 30px;
    padding: 5px 8px;
    font-size: 12.5px;
    font-family: inherit;
    color: var(--text-primary);
    background: transparent;
    border: 1px solid transparent;
    border-radius: 7px;
    cursor: pointer;
    transition: background .13s, border-color .13s;
}
.ee-toolbar button:hover { background: var(--bg-hover); border-color: var(--border-color); }
.ee-tb-sm { font-size: 10.5px; margin-left: 1px; }
.ee-tb-sep { width: 1px; height: 17px; margin: 0 4px; background: var(--border-color); }

/* 编辑区 / 源码 */
.ee-editor-wrap {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 11px;
    overflow: hidden;
}
.ee-editor {
    min-height: 340px;
    max-height: 56vh;
    overflow-y: auto;
    padding: 20px 22px;
    font-size: 15.5px;
    line-height: 1.85;
    color: var(--text-primary);
}
.ee-editor:focus { outline: none; }
.ee-editor:focus-visible { box-shadow: inset 0 0 0 2px var(--accent); }
.ee-editor h1 { font-size: 23px; margin: .8em 0 .5em; }
.ee-editor h2 { font-size: 20px; margin: .8em 0 .5em; }
.ee-editor h3 { font-size: 17.5px; margin: .8em 0 .5em; }
.ee-editor p { margin: .6em 0; }
.ee-editor img { max-width: 100%; border-radius: 6px; }
.ee-editor blockquote {
    margin: .8em 0;
    padding: 6px 14px;
    color: var(--text-secondary);
    border-left: 3px solid var(--accent);
    background: var(--bg-hover);
}
.ee-src {
    display: block;
    width: 100%;
    min-height: 340px;
    max-height: 56vh;
    box-sizing: border-box;
    padding: 14px 16px;
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 12.5px;
    line-height: 1.7;
    color: var(--text-primary);
    background: var(--bg-primary);
    border: 0;
    resize: vertical;
}
.ee-src:focus { outline: none; }

/* 查找替换 */
.ee-find {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 7px;
    padding: 9px 11px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 10px;
}
.ee-find input[type="text"], .ee-find select {
    padding: 7px 10px;
    font-size: 13px;
    font-family: inherit;
    color: var(--text-primary);
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 7px;
    min-width: 0;
}
.ee-find input[type="text"] { flex: 1 1 130px; }
.ee-find input[type="text"]:focus, .ee-find select:focus { outline: none; border-color: var(--accent); }
.ee-chk {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 12.5px;
    color: var(--text-secondary);
    cursor: pointer;
    white-space: nowrap;
}
.ee-chk.block { display: flex; margin-bottom: 9px; font-size: 13.5px; color: var(--text-primary); }
.ee-find-btns { display: flex; gap: 5px; margin-left: auto; flex-wrap: wrap; }

/* 预览 */
.ee-preview-wrap {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 11px;
    overflow: hidden;
}
.ee-preview-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    flex-wrap: wrap;
    padding: 9px 13px;
    font-size: 13px;
    font-weight: 700;
    color: var(--text-primary);
    border-bottom: 1px solid var(--border-color);
}
.ee-preview-tip { font-size: 11.5px; font-weight: 400; color: var(--text-secondary); }
.ee-preview { display: block; width: 100%; height: 470px; border: 0; background: #fff; }

/* ===================== 检查 ===================== */
.ee-check-sum { margin: 0 0 12px; font-size: 13.5px; color: var(--text-secondary); }
.ee-check-sum strong { color: var(--danger); }
.ee-check-ok {
    display: flex;
    align-items: flex-start;
    gap: 11px;
    padding: 15px 16px;
    background: color-mix(in srgb, var(--success) 11%, transparent);
    border: 1px solid color-mix(in srgb, var(--success) 34%, transparent);
    border-radius: 10px;
}
.ee-check-ok-ico {
    flex: 0 0 auto;
    width: 24px; height: 24px;
    display: flex; align-items: center; justify-content: center;
    font-size: 14px; font-weight: 700; color: #fff;
    background: var(--success);
    border-radius: 50%;
}
.ee-check-ok strong { display: block; margin-bottom: 3px; font-size: 14px; color: var(--text-primary); }
.ee-check-ok p { margin: 0; font-size: 12.5px; color: var(--text-secondary); }

.ee-check-sec { margin-bottom: 15px; }
.ee-check-sec h4 {
    display: flex;
    align-items: center;
    gap: 7px;
    margin: 0 0 8px;
    font-size: 13.5px;
    font-weight: 700;
    color: var(--text-primary);
}
.ee-check-sec h4 span {
    padding: 1px 7px;
    font-size: 11px;
    color: var(--danger);
    background: color-mix(in srgb, var(--danger) 14%, transparent);
    border-radius: 999px;
}
.ee-check-sec ul { margin: 0; padding-left: 18px; }
.ee-check-sec li {
    margin-bottom: 5px;
    font-size: 12.5px;
    line-height: 1.7;
    color: var(--text-secondary);
    word-break: break-all;
}
.ee-check-sec code {
    padding: 1px 5px;
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 11.5px;
    color: var(--accent);
    background: var(--bg-hover);
    border-radius: 4px;
}

/* ===================== 导出 ===================== */
.ee-exp-btns { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-top: 16px; }
.ee-exp-ico { font-size: 22px; line-height: 1; }
.ee-exp-txt { display: flex; flex-direction: column; gap: 2px; }
.ee-exp-txt b { font-size: 14px; }
.ee-exp-txt i { font-style: normal; font-size: 11.5px; font-weight: 400; color: var(--text-secondary); }

/* ===================== 图片选择器 ===================== */
.ee-mask {
    position: fixed;
    inset: 0;
    z-index: 120000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background: rgba(0, 0, 0, .55);
}
.ee-modal {
    display: flex;
    flex-direction: column;
    width: 100%;
    max-width: 620px;
    max-height: 82vh;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, .4);
}
.ee-modal-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 17px;
    border-bottom: 1px solid var(--border-color);
}
.ee-modal-head h3 { margin: 0; font-size: 15px; font-weight: 700; }
.ee-modal-body { flex: 1; overflow-y: auto; padding: 15px 17px; }
.ee-modal-tip { margin: 0 0 12px; font-size: 12.5px; color: var(--text-secondary); }
.ee-modal-foot { padding: 12px 17px; border-top: 1px solid var(--border-color); }
.ee-img-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(112px, 1fr)); gap: 10px; }
/* 图片过多时的提示语需横跨整行，而不是占一个网格单元 */
.ee-img-grid .ee-empty-hint { grid-column: 1 / -1; }
.ee-img-cell {
    display: flex;
    flex-direction: column;
    gap: 5px;
    padding: 7px;
    font-family: inherit;
    text-align: center;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 9px;
    cursor: pointer;
    transition: border-color .13s;
}
.ee-img-cell:hover { border-color: var(--accent); }
.ee-img-cell img {
    width: 100%;
    height: 84px;
    object-fit: contain;
    background: #fff;
    border-radius: 5px;
}
.ee-img-cell span {
    font-size: 10.5px;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* ===================== Toast ===================== */
.ee-toast {
    position: fixed;
    left: 50%;
    bottom: 34px;
    z-index: 130000;
    max-width: min(86vw, 460px);
    padding: 11px 18px;
    font-size: 13.5px;
    color: #fff;
    background: rgba(24, 26, 30, .95);
    border-radius: 10px;
    box-shadow: 0 10px 34px rgba(0, 0, 0, .32);
    transform: translate(-50%, 14px);
    opacity: 0;
    pointer-events: none;
    transition: opacity .2s, transform .2s;
}
.ee-toast.show { opacity: 1; transform: translate(-50%, 0); }
.ee-toast.ok { background: color-mix(in srgb, var(--success) 92%, #000); }
.ee-toast.err { background: color-mix(in srgb, var(--danger) 92%, #000); }

/* ===================== 响应式 ===================== */
/* 大桌面（≥1400px）：正文编辑区与预览并排，形成「目录 · 编辑 · 预览」三栏工作区 */
@media (min-width: 1400px) {
    .ee-main {
        display: grid;
        grid-template-columns: minmax(0, 1fr) 420px;
        grid-template-areas:
            "head    head"
            "toolbar toolbar"
            "editor  preview"
            "find    find";
        align-items: start;
        gap: 12px;
    }
    .ee-main-head    { grid-area: head; }
    .ee-toolbar      { grid-area: toolbar; }
    .ee-editor-wrap  { grid-area: editor; min-width: 0; }
    .ee-find         { grid-area: find; }
    .ee-preview-wrap { grid-area: preview; min-width: 0; position: sticky; top: 76px; }

    .ee-editor, .ee-src { max-height: calc(100vh - 240px); min-height: 440px; }
    .ee-preview { height: calc(100vh - 240px); min-height: 440px; }
}

/* 导入态（≥900px）：左侧打开 / 新建，右侧使用提示 + 功能特点，充分利用横向空间 */
@media (min-width: 900px) {
    .ee-gate {
        display: grid;
        grid-template-columns: 1.05fr 1fr;
        gap: 16px;
        align-items: start;
    }
    .ee-gate .ee-hero { grid-column: 1 / -1; }
}

/* 笔记本 / 小平板（≤1100px）：目录移到顶部、正文单列，避免侧栏挤压编辑区 */
@media (max-width: 1100px) {
    .ee-work { grid-template-columns: 1fr; }
    .ee-side { position: static; }
    .ee-chap-list { max-height: 230px; }
    .ee-editor { max-height: none; }
    .ee-preview { height: 380px; }
}

/* 平板（≤880px）：元数据网格、表单、导出按钮收窄为单列 */
@media (max-width: 880px) {
    .ee-grid { grid-template-columns: 1fr; }
    .ee-form { grid-template-columns: 1fr; }
    .ee-exp-btns { grid-template-columns: 1fr; }
}

/* 手机（≤767px） */
@media (max-width: 767px) {
    .ee-page { padding: 14px 12px 34px; }
    .ee-hero { padding: 14px 4px 18px; }
    .ee-hero-title { font-size: 22px; }
    .ee-hero-sub { font-size: 13px; }
    .ee-newmeta { grid-template-columns: 1fr; }
    .ee-author-row { grid-template-columns: 1fr 84px 32px; }
    .ee-bar { padding: 10px 12px; gap: 10px; }
    .ee-bar-left { flex: 1 1 auto; }
    /* 顶栏按钮不再逐行撑满，自然换行更紧凑 */
    .ee-bar-right { width: 100%; justify-content: flex-start; gap: 8px; }
    .ee-bar-right .ee-btn { flex: 0 0 auto; }
    .ee-tabs { padding: 3px; }
    .ee-tab { min-width: 0; padding: 8px 6px; font-size: 12.5px; }
    /* 工具栏横向滚动，避免换行占满屏幕 */
    .ee-toolbar { flex-wrap: nowrap; overflow-x: auto; }
    .ee-editor, .ee-src { min-height: 280px; font-size: 16px; }
    .ee-preview { height: 340px; }
    .ee-find input[type="text"], .ee-field input, .ee-field textarea,
    .ee-nm-field input, .ee-chap-name-input, .ee-author-name, .ee-author-role {
        font-size: 16px; /* 防 iOS 聚焦缩放 */
    }
    .ee-find-btns { margin-left: 0; width: 100%; }
    .ee-find-btns .ee-btn { flex: 1 1 auto; }
    .ee-modal { max-height: 90vh; }
    .ee-mask { padding: 0; align-items: flex-end; }
    .ee-modal { border-radius: 16px 16px 0 0; }
}

@media (max-width: 400px) {
    .ee-hero-tags { gap: 6px; }
    .ee-tag { padding: 3px 9px; font-size: 11.5px; }
    .ee-tab { font-size: 11.5px; }
    .ee-bar-right .ee-btn.primary { width: 100%; } /* 主操作在超小屏独占一行，便于点击 */
}

/* 打印：只留正文 */
@media print {
    .ee-side, .ee-toolbar, .ee-find, .ee-bar, .ee-tabs, .ee-preview-wrap, .ee-main-head { display: none !important; }
    .ee-work { grid-template-columns: 1fr; }
    .ee-editor { max-height: none; overflow: visible; }
}