/* 留言板标题栏 */
.gb-section-title {
    background: var(--color-accent-gradient);
    border-radius: 8px;
    padding: 12px 18px;
    margin-bottom: 16px;
}

.gb-section-title span {
    font-size: 18px;
    font-weight: 700;
    color: var(--color-text-title);
}

/* 留言统计 */
.gb-list-stats {
    padding: 0 4px 4px 4px;
    margin-bottom: 4px;
}

.gb-total-count {
    font-size: 18px;
    font-weight: 700;
    color: var(--color-text-primary);
}

.gb-total-count strong {
    color: var(--color-accent);
    font-size: 20px;
}
/* 用户须知提示框 */
.gb-notice {
    background: color-mix(in srgb, var(--color-success) 12%, var(--color-bg-card));
    border: 1px solid color-mix(in srgb, var(--color-success) 28%, transparent);
    border-left: 4px solid var(--color-success);
    border-radius: 8px;
    padding: 14px 18px;
    margin-bottom: 16px;
}

.gb-notice-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 10px;
    color: var(--color-success);
}


.gb-notice-icon {
    flex-shrink: 0;
}

.gb-notice-title {
    font-size: 15px;
    font-weight: 500;
}



.gb-notice-list {
    margin: 0;
    padding-left: 20px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.gb-notice-list li {
    font-size: 13px;
    line-height: 1.7;
    color: var(--color-text-secondary);
}

.gb-notice-list li strong {
    color: var(--color-text-primary);
    font-weight: 500;
}
/* ============================================================
 * 留言板样式 v4（时间线骨架）
 * ------------------------------------------------------------
 * 骨架：页头横幅 → 全宽发表条 → 消息时间线（左轨头像+竖向连线）→ 分页
 * 变量：主题色全部走 --color-* / --radius-* / --shadow-* 变量链
 *       （variables.css → style.css → 方案 theme.css），浅色/深色自动适配；
 *       仅时间线等保留中性投影 rgba(0,0,0,α)，不参与主题配色
 * 响应式：单列骨架天然适配，仅 ≤600px 收缩时间线缩进与字号
 * JS 契约：guestbook.js 的钩子类名全部保留
 * ============================================================ */

/* ------------------------------------------------------------
 * 最外层容器：限制最大宽度并居中
 * ------------------------------------------------------------ */
.guestbook-page {
    width: 100%;
    max-width: 900px;
    margin: 0 auto;
}





/* ------------------------------------------------------------
 * ② 发表条：全宽横置组件
 * ------------------------------------------------------------ */
.gb-composer {}

.gb-composer-form {
    display: flex;
    flex-direction: column;
    gap: 10px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-card);
    padding: 14px 16px;
    box-shadow: var(--shadow-sm);
    transition: border-color .2s, box-shadow .2s;
}

.gb-composer-form:focus-within {
    border-color: color-mix(in srgb, var(--color-accent) 45%, var(--color-border));
    box-shadow: 0 0 0 3px var(--color-accent-soft);
}

.gb-composer-nickname {
    width: 220px;
    max-width: 100%;
    padding: 8px 12px;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    background: var(--color-bg-page-soft);
    color: var(--color-text-primary);
    font-size: 13px;
    box-sizing: border-box;
    font-family: inherit;
    transition: border-color .2s, box-shadow .2s;
}

.gb-composer-nickname:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px var(--color-accent-soft);
}

.gb-composer-textarea {
    width: 100%;
    min-height: 72px;
    padding: 10px 12px;
    border: 1px solid transparent;
    border-radius: 8px;
    background: var(--color-bg-page-soft);
    color: var(--color-text-primary);
    font-size: 14px;
    line-height: 1.7;
    resize: vertical;
    box-sizing: border-box;
    font-family: inherit;
    transition: border-color .2s, background .2s;
}

.gb-composer-textarea:focus {
    outline: none;
    background: var(--color-bg-card);
    border-color: var(--color-accent);
}

.gb-composer-foot {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}

.gb-composer-hint {
    font-size: 12px;
    color: var(--color-text-dim);
    margin-right: auto;
}

.guestbook-counter {
    font-size: 12px;
    color: var(--color-text-dim);
    font-variant-numeric: tabular-nums;
}

.guestbook-submit-btn {
    padding: 8px 26px;
    border: none;
    border-radius: 10px;
    background: var(--color-accent-gradient);
    color: var(--color-text-title);
    font-size: 13.5px;
    font-weight: 700;
    cursor: pointer;
    box-shadow: 0 2px 8px color-mix(in srgb, var(--color-accent) 30%, transparent);
    transition: transform .15s, box-shadow .15s, filter .15s;
}

.guestbook-submit-btn:disabled {
    opacity: .6;
    cursor: not-allowed;
    transform: none;
}

/* 未登录且开关关闭：登录提示条 */
.gb-composer-locked {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    background: var(--color-bg-page-soft);
    border: 1px dashed var(--color-border-strong);
    border-radius: var(--radius-card);
    padding: 22px 16px;
    color: var(--color-text-secondary);
    font-size: 13.5px;
}

.gb-composer-locked svg {
    color: var(--color-text-dim);
    flex-shrink: 0;
}

.gb-composer-locked a {
    color: var(--color-accent);
    font-weight: 500;
    text-decoration: none;
}

/* ------------------------------------------------------------
 * ③ 消息时间线：左轨头像 + 竖向连线
 * ------------------------------------------------------------ */
.gb-timeline {
    position: relative;
    list-style: none;
    margin: 0;
    padding: 24px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05), 0 1px 2px rgba(0, 0, 0, 0.03);
}

/* 竖向连线：顶部带 accent 渐入，向下过渡为普通边框色 */
/* 空态时不渲染连线 */
.guestbook-item {
    position: relative;
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 24px 4px;
    border-bottom: 1px dashed var(--color-border);
}

.guestbook-item:last-child {
    border-bottom: none;
}



.guestbook-avatar {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    overflow: hidden;
    background: var(--color-bg-page-soft);
}

.gb-msg-body {
    flex: 1;
    min-width: 0;
}

.guestbook-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.guestbook-avatar-default {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    font-weight: 700;
    color: var(--color-accent-ink);
    background: var(--color-accent-soft);
    user-select: none;
}

/* 楼层头部：左侧昵称+徽标+时间，右侧操作按钮 */
.gb-msg-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    min-width: 0;
    margin-bottom: 6px;
}

.gb-msg-head-left {
    display: flex;
    align-items: center;
    gap: 8px;
    min-width: 0;
    flex: 1;
}

.gb-msg-head-right {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}

.guestbook-username {
    font-size: 16px;
    font-weight: 500;
    color: var(--color-accent);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    text-shadow: 0 0 3px color-mix(in srgb, var(--color-accent) 25%, transparent);
}

.guestbook-guest-badge {
    flex-shrink: 0;
    font-size: 11px;
    line-height: 1;
    padding: 3px 8px;
    border-radius: 999px;
    color: var(--color-accent-ink);
    background: var(--color-accent-soft);
    border: 1px solid color-mix(in srgb, var(--color-accent) 30%, transparent);
}

.guest-badge-sm {
    font-size: 10px;
    padding: 2px 6px;
}

.guestbook-time {
    font-size: 12px;
    color: var(--color-text-dim);
    flex-shrink: 0;
    font-variant-numeric: tabular-nums;
}

.guestbook-content {
    margin: 10px 24px 14px 0;
    font-size: 14px;
    line-height: 1.7;
    color: var(--color-text-primary);
    word-break: break-word;
}

/* 催更留言：关联文章引用条（可点击跳回该文章），位于头部与正文之间 */
.gb-doc-ref {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    margin: 0 24px 8px 0;
    padding: 4px 10px;
    border-radius: 6px;
    background: var(--color-accent-soft);
    color: var(--color-accent-dark);
    font-size: 12px;
    font-weight: 600;
    text-decoration: none;
    max-width: 100%;
    transition: background .15s, color .15s;
}
.gb-doc-ref:hover { background: var(--color-accent-gradient); color: var(--color-accent-ink); }
.gb-doc-ref svg { flex-shrink: 0; }



.guestbook-reply-btn {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 4px 10px;
    border: none;
    border-radius: 8px;
    background: transparent;
    color: var(--color-text-secondary);
    font-size: 12.5px;
    cursor: pointer;
    transition: color .2s, background .2s;
}

.guestbook-like-btn {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 4px 12px;
    border-radius: 999px;
    border: 1px solid var(--color-border);
    background: transparent;
    color: var(--color-text-secondary);
    font-size: 12px;
    cursor: pointer;
    transition: color .2s, background .2s, border-color .2s, transform .1s;
}

.guestbook-like-btn:active {
    transform: scale(.94);
}

.guestbook-like-btn.liked {
    color: var(--color-danger);
    border-color: color-mix(in srgb, var(--color-danger) 45%, transparent);
    background: color-mix(in srgb, var(--color-danger) 10%, transparent);
}

/* 作者自助按钮（编辑 / 删除）：同一形态，仅 hover 语义色不同 */
.guestbook-edit-btn,
.guestbook-delete-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    border-radius: 9px;
    border: none;
    background: transparent;
    color: var(--color-text-dim);
    cursor: pointer;
    opacity: .55;
    transition: color .2s, opacity .2s, background .2s;
}

.guestbook-edit-btn:hover {
    color: var(--color-accent);
    opacity: 1;
}

.guestbook-delete-btn:hover {
    color: var(--color-danger);
    opacity: 1;
}

/* 回复楼层内的作者按钮收一号，避免压过 11px 的时间行 */
.guestbook-own-btn-sm {
    width: 28px;
    height: 28px;
}

/* [hidden] 属性必须显式压制，避免被类样式覆盖 */
.gb-edit-body[hidden] {
    display: none !important;
}

/* 就地编辑器（编辑留言 / 回复）：与楼层内回复表单同一观感 */
.gb-editor {
    margin-top: 10px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

/* 回复列表：浅底气泡从属于楼层 */
.guestbook-replies {
    margin: 16px 0 0 10px;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.guestbook-reply-item {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding-left: 12px;
    border-left: 2px solid color-mix(in srgb, var(--color-accent) 35%, transparent);
}

.guestbook-reply-avatar {
    flex-shrink: 0;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    overflow: hidden;
    background: var(--color-bg-page-soft);
}

.guestbook-reply-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.guestbook-reply-avatar .guestbook-avatar-default {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    font-weight: 500;
    color: var(--color-text-secondary);
}

.reply-body {
    flex: 1;
    min-width: 0;
}

.gb-reply-head {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 4px;
}

.guestbook-reply-username {
    font-size: 15px;
    font-weight: 500;
    color: var(--color-text-title);

    text-shadow: 0 0 2px color-mix(in srgb, var(--color-accent) 20%, transparent);
}

.guestbook-reply-time {
    font-size: 11px;
    color: var(--color-text-dim);
    margin-left: auto;
    font-variant-numeric: tabular-nums;
}

.guestbook-reply-content {
    font-size: 13.5px;
    line-height: 1.7;
    color: var(--color-text-primary);
    word-break: break-word;
}

/* 回复表单（楼层内展开） */
.guestbook-reply-form {
    margin-top: 12px;
    padding: 12px;
    background: var(--color-bg-page-soft);
    border-radius: var(--radius-sm);
    display: flex;
    flex-direction: column;
    gap: 8px;
}

/* [hidden] 属性必须显式压制，避免被类样式覆盖 */
.guestbook-reply-form[hidden] {
    display: none !important;
}

.guestbook-reply-nickname {
    width: 200px;
    max-width: 100%;
    padding: 8px 12px;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    background: var(--color-bg-card);
    color: var(--color-text-primary);
    font-size: 13px;
    box-sizing: border-box;
    font-family: inherit;
    transition: border-color .2s, box-shadow .2s;
}

.guestbook-reply-textarea,
.gb-editor-input {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    background: var(--color-bg-card);
    color: var(--color-text-primary);
    font-size: 13.5px;
    line-height: 1.7;
    resize: vertical;
    min-height: 56px;
    box-sizing: border-box;
    font-family: inherit;
    transition: border-color .2s, box-shadow .2s;
}

.guestbook-reply-nickname:focus,
.guestbook-reply-textarea:focus,
.gb-editor-input:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px var(--color-accent-soft);
}

.gb-reply-foot,
.gb-editor-foot {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
}

/* 编辑器字数计数：靠左，与右侧按钮分离 */
.gb-editor-counter {
    margin-right: auto;
    align-self: center;
    font-size: 12px;
    color: var(--color-text-dim);
    font-variant-numeric: tabular-nums;
}

.guestbook-reply-cancel,
.gb-editor-cancel {
    padding: 6px 14px;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    background: transparent;
    color: var(--color-text-secondary);
    font-size: 12.5px;
    cursor: pointer;
    transition: color .2s, border-color .2s;
}

.guestbook-reply-submit,
.gb-editor-save {
    padding: 6px 16px;
    border: none;
    border-radius: 8px;
    background: var(--color-accent-gradient);
    color: var(--color-text-title);
    font-size: 12.5px;
    font-weight: 500;
    cursor: pointer;
    transition: transform .15s, filter .15s;
}

.guestbook-reply-submit:disabled,
.gb-editor-save:disabled {
    opacity: .6;
    cursor: not-allowed;
    transform: none;
}

/* ------------------------------------------------------------
 * ④ 加载更多
 * ------------------------------------------------------------ */
.gb-loadmore-wrap {
    display: flex;
    justify-content: center;
    margin-top: 24px;
}

.gb-loadmore {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 28px;
    border-radius: 999px;
    border: 1px solid var(--color-border);
    background: var(--color-bg-card);
    color: var(--color-text-secondary);
    font-size: 14px;
    cursor: pointer;
    transition: color .2s, border-color .2s, background .2s;
}

.gb-loadmore:hover:not(:disabled) {
    color: var(--color-accent);
    border-color: var(--color-accent);
}

.gb-loadmore:disabled {
    opacity: .6;
    cursor: not-allowed;
}

/* ------------------------------------------------------------
 * 空状态（位于时间线之外，占满阅读列）
 * ------------------------------------------------------------ */
.guestbook-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    padding: 56px 20px;
    background: var(--color-bg-card);
    border: 1px dashed var(--color-border-strong);
    border-radius: var(--radius-card);
    color: var(--color-text-dim);
    font-size: 14px;
}

.guestbook-empty svg {
    opacity: .5;
}

.guestbook-empty p {
    margin: 0;
}