/* ============================================================
   Forum 论坛主题 - 核心样式（深色版）
   颜色体系：深蓝黑底 + 蓝紫渐变主色 + 绿色辅助
   ============================================================ */

/* ---------- CSS 变量 ---------- */
:root {
    --forum-bg: #0b0e14;
    --forum-surface: #141820;
    --forum-surface-2: #1c2130;
    --forum-border: #2a2f3d;
    --forum-border-light: #333a4d;
    --forum-primary: #3b82f6;
    --forum-primary-dark: #2563eb;
    --forum-primary-glow: rgba(59, 130, 246, 0.25);
    --forum-accent: #8b5cf6;
    --forum-green: #22c55e;
    --forum-green-bg: rgba(34, 197, 94, 0.12);
    --forum-red: #ef4444;
    --forum-red-bg: rgba(239, 68, 68, 0.12);
    --forum-orange: #f97316;
    --forum-text: #e2e8f0;
    --forum-text-muted: #8b95a5;
    --forum-text-dim: #4b5563;
    --forum-shadow: 0 4px 24px rgba(0, 0, 0, 0.5);
    --forum-radius: 10px;
    --forum-radius-sm: 6px;
    --forum-radius-lg: 14px;
    --forum-transition: 0.2s ease;
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
}

/* ---------- 基础重置 ---------- */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    background: var(--forum-bg);
    color: var(--forum-text);
    font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
    font-size: 14px;
    line-height: 1.6;
    min-height: 100vh;
}

a {
    color: var(--forum-primary);
    text-decoration: none;
    transition: color var(--forum-transition);
}
a:hover { color: #60a5fa; }

img { max-width: 100%; height: auto; }

ul, ol { list-style: none; }

button {
    cursor: pointer;
    border: none;
    background: none;
    font-family: inherit;
}

input, textarea, select {
    font-family: inherit;
    font-size: inherit;
}

/* 滚动条 */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--forum-bg); }
::-webkit-scrollbar-thumb { background: var(--forum-border-light); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--forum-text-dim); }

/* 选中文字 */
::selection { background: var(--forum-primary-glow); color: var(--forum-text); }

/* 辅助类 */
.unstyle-li { list-style: none; margin: 0; padding: 0; }
.forum-container {
    max-width: 1320px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}
.sr-only {
    position: absolute; width: 1px; height: 1px;
    padding: 0; margin: -1px; overflow: hidden;
    clip: rect(0,0,0,0); border: 0;
}

/* ---------- 顶栏 ---------- */
.forum-header {
    background: linear-gradient(135deg, #0d1117 0%, #111827 100%);
    border-bottom: 1px solid var(--forum-border);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(12px);
}

.forum-header__inner {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    height: 60px;
}

.forum-header__logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    flex-shrink: 0;
}

.forum-header__logo-icon {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--forum-primary) 0%, var(--forum-accent) 100%);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    color: #fff;
    box-shadow: 0 2px 12px var(--forum-primary-glow);
}

.forum-header__logo-text {
    font-size: 17px;
    font-weight: 700;
    color: #fff;
    letter-spacing: 0.5px;
}

.forum-header__nav {
    display: flex;
    align-items: center;
    gap: 4px;
    flex: 1;
}

.forum-nav-item {
    padding: 6px 14px;
    border-radius: var(--forum-radius-sm);
    color: var(--forum-text-muted);
    font-size: 14px;
    font-weight: 500;
    transition: all var(--forum-transition);
    white-space: nowrap;
}
.forum-nav-item:hover {
    color: #fff;
    background: var(--forum-surface-2);
}
.forum-nav-item.active {
    color: var(--forum-primary);
    background: rgba(59, 130, 246, 0.12);
}

.forum-header__actions {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    flex-shrink: 0;
}

/* 搜索框 */
.forum-search {
    position: relative;
}

.forum-search__input {
    background: var(--forum-surface-2);
    border: 1px solid var(--forum-border);
    border-radius: var(--forum-radius-sm);
    padding: 7px 12px 7px 36px;
    color: var(--forum-text);
    font-size: 13px;
    width: 220px;
    transition: all var(--forum-transition);
    outline: none;
}
.forum-search__input:focus {
    border-color: var(--forum-primary);
    box-shadow: 0 0 0 3px var(--forum-primary-glow);
    width: 280px;
}
.forum-search__input::placeholder { color: var(--forum-text-dim); }

.forum-search__icon {
    position: absolute;
    left: 10px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--forum-text-dim);
    font-size: 16px;
    pointer-events: none;
}

/* 按钮 */
.forum-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 7px 16px;
    border-radius: var(--forum-radius-sm);
    font-size: 13px;
    font-weight: 600;
    transition: all var(--forum-transition);
    cursor: pointer;
    border: none;
    white-space: nowrap;
}

.forum-btn--primary {
    background: linear-gradient(135deg, var(--forum-primary) 0%, var(--forum-accent) 100%);
    color: #fff;
    box-shadow: 0 2px 12px var(--forum-primary-glow);
}
.forum-btn--primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 20px var(--forum-primary-glow);
    filter: brightness(1.1);
}

.forum-btn--ghost {
    background: transparent;
    color: var(--forum-text-muted);
    border: 1px solid var(--forum-border);
}
.forum-btn--ghost:hover {
    border-color: var(--forum-primary);
    color: var(--forum-primary);
    background: rgba(59, 130, 246, 0.08);
}

.forum-btn--icon {
    padding: 7px;
    border-radius: var(--forum-radius-sm);
    background: var(--forum-surface-2);
    border: 1px solid var(--forum-border);
    color: var(--forum-text-muted);
    font-size: 18px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: all var(--forum-transition);
}
.forum-btn--icon:hover {
    color: var(--forum-primary);
    border-color: var(--forum-primary);
    background: rgba(59, 130, 246, 0.1);
}

/* ---------- 面包屑 ---------- */
.forum-breadcrumb {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    color: var(--forum-text-dim);
    margin-bottom: var(--space-lg);
}
.forum-breadcrumb a { color: var(--forum-text-muted); }
.forum-breadcrumb a:hover { color: var(--forum-primary); }
.forum-breadcrumb__sep { color: var(--forum-border-light); }

/* ---------- 主内容区 ---------- */
.forum-layout {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: var(--space-lg);
    padding: var(--space-lg) 0;
    align-items: start;
}

/* ---------- 分类标签栏（Tab） ---------- */
.forum-tabs {
    display: flex;
    align-items: center;
    gap: 2px;
    background: var(--forum-surface);
    border: 1px solid var(--forum-border);
    border-radius: var(--forum-radius);
    padding: 4px;
    margin-bottom: var(--space-md);
    overflow-x: auto;
}

.forum-tab {
    padding: 7px 18px;
    border-radius: var(--forum-radius-sm);
    font-size: 13px;
    font-weight: 500;
    color: var(--forum-text-muted);
    transition: all var(--forum-transition);
    white-space: nowrap;
    cursor: pointer;
    border: none;
    background: none;
}
.forum-tab:hover { color: var(--forum-text); background: var(--forum-surface-2); }
.forum-tab.active {
    background: var(--forum-primary);
    color: #fff;
    box-shadow: 0 2px 8px var(--forum-primary-glow);
}

.forum-tabs__right {
    margin-left: auto;
    display: flex;
    gap: var(--space-sm);
    padding: 0 4px;
}

/* ---------- 发帖筛选排序 ---------- */
.forum-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-md);
    padding: 10px 16px;
    background: var(--forum-surface);
    border: 1px solid var(--forum-border);
    border-radius: var(--forum-radius);
}

.forum-toolbar__info {
    font-size: 13px;
    color: var(--forum-text-muted);
}
.forum-toolbar__info strong { color: var(--forum-text); }

.forum-sort-btns {
    display: flex;
    gap: 4px;
}
.forum-sort-btn {
    padding: 5px 12px;
    border-radius: var(--forum-radius-sm);
    font-size: 12px;
    font-weight: 500;
    color: var(--forum-text-muted);
    background: transparent;
    border: 1px solid var(--forum-border);
    cursor: pointer;
    transition: all var(--forum-transition);
}
.forum-sort-btn:hover {
    border-color: var(--forum-primary);
    color: var(--forum-primary);
}
.forum-sort-btn.active {
    background: rgba(59, 130, 246, 0.12);
    border-color: var(--forum-primary);
    color: var(--forum-primary);
}

/* ---------- 帖子列表 ---------- */
.forum-post-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.forum-post-item {
    background: var(--forum-surface);
    border: 1px solid var(--forum-border);
    border-radius: var(--forum-radius);
    padding: 16px;
    display: grid;
    grid-template-columns: 44px 1fr auto;
    gap: 14px;
    align-items: start;
    transition: all var(--forum-transition);
    cursor: pointer;
}
.forum-post-item:hover {
    border-color: var(--forum-primary);
    background: var(--forum-surface-2);
    transform: translateY(-1px);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
}

/* 头像 */
.forum-post__avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    overflow: hidden;
    flex-shrink: 0;
    border: 2px solid var(--forum-border);
    background: var(--forum-surface-2);
}
.forum-post__avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* 主体 */
.forum-post__body {
    min-width: 0;
}

.forum-post__top {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 6px;
    flex-wrap: wrap;
}

.forum-post__sort-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 11px;
    font-weight: 600;
    background: rgba(59, 130, 246, 0.12);
    color: var(--forum-primary);
    border: 1px solid rgba(59, 130, 246, 0.3);
}

.forum-post__tag {
    display: inline-flex;
    align-items: center;
    padding: 2px 7px;
    border-radius: 4px;
    font-size: 11px;
    font-weight: 600;
}
.forum-post__tag--top {
    background: var(--forum-red-bg);
    color: var(--forum-red);
    border: 1px solid rgba(239, 68, 68, 0.25);
}
.forum-post__tag--new {
    background: var(--forum-green-bg);
    color: var(--forum-green);
    border: 1px solid rgba(34, 197, 94, 0.25);
}
.forum-post__tag--hot {
    background: rgba(249, 115, 22, 0.12);
    color: var(--forum-orange);
    border: 1px solid rgba(249, 115, 22, 0.25);
}

.forum-post__title {
    font-size: 15px;
    font-weight: 600;
    color: var(--forum-text);
    margin-bottom: 6px;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.forum-post__title:hover { color: var(--forum-primary); }

.forum-post__meta {
    display: flex;
    align-items: center;
    gap: 14px;
    font-size: 12px;
    color: var(--forum-text-dim);
    flex-wrap: wrap;
}
.forum-post__meta-item {
    display: inline-flex;
    align-items: center;
    gap: 4px;
}
.forum-post__meta-item i { font-size: 13px; }

.forum-post__author-name {
    color: var(--forum-text-muted);
    font-weight: 500;
}
.forum-post__author-name:hover { color: var(--forum-primary); }

/* 右侧统计 */
.forum-post__stats {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    min-width: 64px;
}

.forum-post__stat-box {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
}

.forum-post__stat-num {
    font-size: 16px;
    font-weight: 700;
    color: var(--forum-text);
    line-height: 1;
}

.forum-post__stat-label {
    font-size: 10px;
    color: var(--forum-text-dim);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.forum-post__stat-box--reply .forum-post__stat-num {
    color: var(--forum-primary);
}

/* ---------- 分页 ---------- */
.forum-pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    margin-top: var(--space-lg);
}

.forum-pagination__btn {
    min-width: 36px;
    height: 36px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--forum-radius-sm);
    font-size: 13px;
    font-weight: 500;
    border: 1px solid var(--forum-border);
    background: var(--forum-surface);
    color: var(--forum-text-muted);
    transition: all var(--forum-transition);
    padding: 0 10px;
}
.forum-pagination__btn:hover {
    border-color: var(--forum-primary);
    color: var(--forum-primary);
    background: rgba(59, 130, 246, 0.08);
}
.forum-pagination__btn.active {
    background: var(--forum-primary);
    border-color: var(--forum-primary);
    color: #fff;
    box-shadow: 0 2px 8px var(--forum-primary-glow);
}
.forum-pagination__btn:disabled {
    opacity: 0.35;
    cursor: not-allowed;
}

/* ---------- 侧边栏 ---------- */
.forum-sidebar {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    position: sticky;
    top: 76px;
}

/* 侧边栏卡片 */
.forum-side-card {
    background: var(--forum-surface);
    border: 1px solid var(--forum-border);
    border-radius: var(--forum-radius);
    overflow: hidden;
}

.forum-side-card__head {
    padding: 12px 16px;
    border-bottom: 1px solid var(--forum-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.forum-side-card__title {
    font-size: 14px;
    font-weight: 700;
    color: var(--forum-text);
    display: flex;
    align-items: center;
    gap: 7px;
}
.forum-side-card__title i {
    font-size: 16px;
    color: var(--forum-primary);
}

.forum-side-card__more {
    font-size: 12px;
    color: var(--forum-text-dim);
}
.forum-side-card__more:hover { color: var(--forum-primary); }

.forum-side-card__body {
    padding: 12px;
}

/* 统计面板 */
.forum-stats-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}

.forum-stat-item {
    background: var(--forum-surface-2);
    border-radius: var(--forum-radius-sm);
    padding: 12px 10px;
    text-align: center;
}

.forum-stat-item__num {
    font-size: 22px;
    font-weight: 800;
    background: linear-gradient(135deg, var(--forum-primary) 0%, var(--forum-accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    margin-bottom: 4px;
}

.forum-stat-item__label {
    font-size: 11px;
    color: var(--forum-text-dim);
}

/* 分类列表 */
.forum-cat-list {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.forum-cat-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 9px 12px;
    border-radius: var(--forum-radius-sm);
    transition: all var(--forum-transition);
    text-decoration: none;
}
.forum-cat-item:hover {
    background: var(--forum-surface-2);
}

.forum-cat-item__icon {
    width: 32px;
    height: 32px;
    border-radius: 6px;
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid rgba(59, 130, 246, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--forum-primary);
    font-size: 16px;
    flex-shrink: 0;
}
.forum-cat-item__icon--blue {
    background: rgba(59, 130, 246, 0.1);
    border-color: rgba(59, 130, 246, 0.2);
    color: var(--forum-primary);
}
.forum-cat-item__icon--purple {
    background: rgba(139, 92, 246, 0.1);
    border-color: rgba(139, 92, 246, 0.2);
    color: var(--forum-accent);
}
.forum-cat-item__icon--green {
    background: rgba(34, 197, 94, 0.1);
    border-color: rgba(34, 197, 94, 0.2);
    color: var(--forum-green);
}
.forum-cat-item__icon--orange {
    background: rgba(249, 115, 22, 0.1);
    border-color: rgba(249, 115, 22, 0.2);
    color: var(--forum-orange);
}

.forum-cat-item__body { flex: 1; min-width: 0; }

.forum-cat-item__name {
    font-size: 13px;
    font-weight: 600;
    color: var(--forum-text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.forum-cat-item:hover .forum-cat-item__name { color: var(--forum-primary); }

.forum-cat-item__count {
    font-size: 11px;
    color: var(--forum-text-dim);
}

.forum-cat-item__num {
    font-size: 13px;
    font-weight: 700;
    color: var(--forum-text-dim);
    flex-shrink: 0;
}

/* 热门/最新帖子 */
.forum-short-list {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.forum-short-item {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 8px 12px;
    border-radius: var(--forum-radius-sm);
    transition: all var(--forum-transition);
    text-decoration: none;
}
.forum-short-item:hover {
    background: var(--forum-surface-2);
}

.forum-short-item__rank {
    width: 20px;
    height: 20px;
    border-radius: 4px;
    background: var(--forum-surface-2);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 11px;
    font-weight: 700;
    color: var(--forum-text-dim);
    flex-shrink: 0;
    margin-top: 2px;
}
.forum-short-item__rank--hot {
    background: rgba(239, 68, 68, 0.12);
    color: var(--forum-red);
}
.forum-short-item__rank--new {
    background: rgba(34, 197, 94, 0.12);
    color: var(--forum-green);
}

.forum-short-item__body { flex: 1; min-width: 0; }

.forum-short-item__title {
    font-size: 13px;
    font-weight: 500;
    color: var(--forum-text);
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
    line-height: 1.4;
}
.forum-short-item:hover .forum-short-item__title { color: var(--forum-primary); }

.forum-short-item__meta {
    font-size: 11px;
    color: var(--forum-text-dim);
    margin-top: 2px;
}

/* ---------- 标签云 ---------- */
.forum-tag-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    padding: 12px;
}

.forum-tag-item {
    display: inline-flex;
    align-items: center;
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
    background: var(--forum-surface-2);
    border: 1px solid var(--forum-border);
    color: var(--forum-text-muted);
    text-decoration: none;
    transition: all var(--forum-transition);
}
.forum-tag-item:hover {
    border-color: var(--forum-primary);
    color: var(--forum-primary);
    background: rgba(59, 130, 246, 0.08);
}

/* ---------- 发帖入口卡 ---------- */
.forum-new-post-card {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.08) 0%, rgba(139, 92, 246, 0.08) 100%);
    border: 1px solid rgba(59, 130, 246, 0.2);
    border-radius: var(--forum-radius);
    padding: 20px;
    text-align: center;
}

.forum-new-post-card__title {
    font-size: 15px;
    font-weight: 700;
    color: var(--forum-text);
    margin-bottom: 8px;
}

.forum-new-post-card__desc {
    font-size: 12px;
    color: var(--forum-text-dim);
    margin-bottom: 14px;
}

/* ---------- 文章详情页 ---------- */
.forum-log-shell {
    padding: var(--space-lg) 0;
}

.forum-log-hero {
    background: var(--forum-surface);
    border: 1px solid var(--forum-border);
    border-radius: var(--forum-radius-lg);
    padding: var(--space-xl);
    margin-bottom: var(--space-lg);
}

.forum-log-hero__head {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

.forum-log-hero__meta {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
    margin-bottom: var(--space-md);
}

.forum-log-hero__title {
    font-size: 26px;
    font-weight: 800;
    color: #fff;
    line-height: 1.3;
    margin-bottom: var(--space-md);
}

.forum-log-hero__author {
    display: flex;
    align-items: center;
    gap: 10px;
}

.forum-log-author-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    overflow: hidden;
    border: 2px solid var(--forum-border);
}
.forum-log-author-avatar img { width: 100%; height: 100%; object-fit: cover; }

.forum-log-author-info { flex: 1; }
.forum-log-author-name {
    font-size: 14px;
    font-weight: 600;
    color: var(--forum-text);
}
.forum-log-author-name:hover { color: var(--forum-primary); }
.forum-log-author-time {
    font-size: 12px;
    color: var(--forum-text-dim);
}

.forum-log-actions {
    display: flex;
    gap: var(--space-sm);
    flex-shrink: 0;
}

/* 帖子正文 */
.forum-log-content {
    background: var(--forum-surface);
    border: 1px solid var(--forum-border);
    border-radius: var(--forum-radius-lg);
    padding: var(--space-xl);
    margin-bottom: var(--space-lg);
    line-height: 1.8;
    font-size: 15px;
    color: var(--forum-text);
}

.forum-log-content p { margin-bottom: 16px; }
.forum-log-content img {
    max-width: 100%;
    border-radius: var(--forum-radius);
    border: 1px solid var(--forum-border);
    margin: 8px 0;
}
.forum-log-content code {
    background: var(--forum-surface-2);
    border: 1px solid var(--forum-border);
    border-radius: 4px;
    padding: 2px 6px;
    font-family: 'Fira Code', 'Cascadia Code', monospace;
    font-size: 13px;
    color: var(--forum-accent);
}
.forum-log-content pre {
    background: var(--forum-surface-2);
    border: 1px solid var(--forum-border);
    border-radius: var(--forum-radius);
    padding: var(--space-md);
    overflow-x: auto;
    margin-bottom: 16px;
}
.forum-log-content pre code {
    background: none;
    border: none;
    padding: 0;
    color: var(--forum-text);
}
.forum-log-content blockquote {
    border-left: 3px solid var(--forum-primary);
    padding: 10px 16px;
    background: rgba(59, 130, 246, 0.05);
    border-radius: 0 var(--forum-radius-sm) var(--forum-radius-sm) 0;
    margin-bottom: 16px;
    color: var(--forum-text-muted);
}
.forum-log-content ul, .forum-log-content ol {
    padding-left: 24px;
    margin-bottom: 16px;
}
.forum-log-content ul { list-style: disc; }
.forum-log-content ol { list-style: decimal; }
.forum-log-content li { margin-bottom: 4px; }
.forum-log-content h1, .forum-log-content h2, .forum-log-content h3,
.forum-log-content h4, .forum-log-content h5, .forum-log-content h6 {
    font-weight: 700;
    color: #fff;
    margin: 24px 0 12px;
}
.forum-log-content h2 { font-size: 20px; }
.forum-log-content h3 { font-size: 17px; }

/* ---------- 回帖区 ---------- */
.forum-comments {
    margin-bottom: var(--space-lg);
}

.forum-comments__head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 18px;
    background: var(--forum-surface);
    border: 1px solid var(--forum-border);
    border-bottom: none;
    border-radius: var(--forum-radius) var(--forum-radius) 0 0;
}

.forum-comments__title {
    font-size: 15px;
    font-weight: 700;
    color: var(--forum-text);
    display: flex;
    align-items: center;
    gap: 8px;
}
.forum-comments__count {
    background: var(--forum-primary);
    color: #fff;
    font-size: 11px;
    font-weight: 700;
    padding: 1px 7px;
    border-radius: 10px;
}

.forum-comment-form {
    background: var(--forum-surface);
    border: 1px solid var(--forum-border);
    border-radius: var(--forum-radius);
    padding: var(--space-md);
    margin-bottom: var(--space-md);
}

.forum-comment-form__login {
    text-align: center;
    padding: var(--space-md);
    color: var(--forum-text-muted);
    font-size: 13px;
}
.forum-comment-form__login a { font-weight: 600; }

.forum-comment-form__fields {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-sm);
    margin-bottom: var(--space-md);
}

.forum-comment-field {
    background: var(--forum-surface-2);
    border: 1px solid var(--forum-border);
    border-radius: var(--forum-radius-sm);
    padding: 8px 12px;
    color: var(--forum-text);
    font-size: 13px;
    width: 100%;
    transition: border-color var(--forum-transition);
    outline: none;
}
.forum-comment-field:focus {
    border-color: var(--forum-primary);
    box-shadow: 0 0 0 2px var(--forum-primary-glow);
}
.forum-comment-field::placeholder { color: var(--forum-text-dim); }

.forum-comment-form__textarea {
    width: 100%;
    min-height: 100px;
    resize: vertical;
    background: var(--forum-surface-2);
    border: 1px solid var(--forum-border);
    border-radius: var(--forum-radius-sm);
    padding: 10px 12px;
    color: var(--forum-text);
    font-size: 14px;
    line-height: 1.6;
    margin-bottom: var(--space-md);
    outline: none;
    transition: border-color var(--forum-transition);
}
.forum-comment-form__textarea:focus {
    border-color: var(--forum-primary);
    box-shadow: 0 0 0 2px var(--forum-primary-glow);
}
.forum-comment-form__textarea::placeholder { color: var(--forum-text-dim); }

.forum-comment-form__foot {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-md);
}

.forum-comment-form__tools {
    display: flex;
    gap: var(--space-xs);
}

.forum-comment-submit {
    background: linear-gradient(135deg, var(--forum-primary) 0%, var(--forum-accent) 100%);
    color: #fff;
    border: none;
    border-radius: var(--forum-radius-sm);
    padding: 8px 20px;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: all var(--forum-transition);
    box-shadow: 0 2px 8px var(--forum-primary-glow);
}
.forum-comment-submit:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 16px var(--forum-primary-glow);
    filter: brightness(1.1);
}

/* 单条回帖 */
.forum-comment-item {
    background: var(--forum-surface);
    border: 1px solid var(--forum-border);
    border-radius: var(--forum-radius);
    padding: 16px;
    margin-bottom: var(--space-sm);
    transition: border-color var(--forum-transition);
}
.forum-comment-item:hover { border-color: var(--forum-border-light); }
.forum-comment-item--op {
    border-left: 3px solid var(--forum-primary);
}

.forum-comment-item__head {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 10px;
}

.forum-comment-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    overflow: hidden;
    border: 2px solid var(--forum-border);
    flex-shrink: 0;
}
.forum-comment-avatar img { width: 100%; height: 100%; object-fit: cover; }

.forum-comment-user {
    flex: 1;
}

.forum-comment-username {
    font-size: 13px;
    font-weight: 600;
    color: var(--forum-text);
}
.forum-comment-username:hover { color: var(--forum-primary); }

.forum-comment-username--op {
    color: var(--forum-primary);
}
.forum-comment-username--op::after {
    content: '楼主';
    margin-left: 6px;
    font-size: 10px;
    font-weight: 700;
    background: rgba(59, 130, 246, 0.15);
    color: var(--forum-primary);
    border: 1px solid rgba(59, 130, 246, 0.3);
    border-radius: 4px;
    padding: 0 5px;
}

.forum-comment-floor {
    font-size: 11px;
    color: var(--forum-text-dim);
    background: var(--forum-surface-2);
    border-radius: 4px;
    padding: 1px 7px;
    flex-shrink: 0;
}

.forum-comment-time {
    font-size: 11px;
    color: var(--forum-text-dim);
    flex-shrink: 0;
}

.forum-comment-body {
    font-size: 14px;
    color: var(--forum-text);
    line-height: 1.7;
    margin-bottom: 10px;
    word-break: break-all;
}
.forum-comment-body p { margin-bottom: 6px; }
.forum-comment-body p:last-child { margin-bottom: 0; }

.forum-comment-foot {
    display: flex;
    align-items: center;
    gap: 12px;
}

.forum-comment-action {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 12px;
    color: var(--forum-text-dim);
    cursor: pointer;
    transition: color var(--forum-transition);
    background: none;
    border: none;
    padding: 0;
}
.forum-comment-action:hover { color: var(--forum-primary); }
.forum-comment-action i { font-size: 14px; }

/* ---------- 底部 ---------- */
.forum-footer {
    background: var(--forum-surface);
    border-top: 1px solid var(--forum-border);
    padding: var(--space-xl) 0 var(--space-lg);
    margin-top: var(--space-xl);
}

.forum-footer__inner {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: var(--space-xl);
    align-items: start;
}

.forum-footer__brand { margin-bottom: var(--space-md); }

.forum-footer__logo {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: var(--space-sm);
}

.forum-footer__logo-icon {
    width: 30px;
    height: 30px;
    background: linear-gradient(135deg, var(--forum-primary), var(--forum-accent));
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    color: #fff;
}

.forum-footer__logo-name {
    font-size: 15px;
    font-weight: 700;
    color: var(--forum-text);
}

.forum-footer__desc {
    font-size: 12px;
    color: var(--forum-text-dim);
    max-width: 400px;
    line-height: 1.6;
}

.forum-footer__links {
    display: flex;
    gap: var(--space-xl);
}

.forum-footer__col-title {
    font-size: 13px;
    font-weight: 700;
    color: var(--forum-text);
    margin-bottom: var(--space-sm);
}

.forum-footer__link-list {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.forum-footer__link {
    font-size: 12px;
    color: var(--forum-text-dim);
    transition: color var(--forum-transition);
}
.forum-footer__link:hover { color: var(--forum-primary); }

.forum-footer__bottom {
    border-top: 1px solid var(--forum-border);
    margin-top: var(--space-lg);
    padding-top: var(--space-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-md);
}

.forum-footer__copyright {
    font-size: 12px;
    color: var(--forum-text-dim);
}

.forum-footer__badges {
    display: flex;
    gap: 10px;
    align-items: center;
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
    .forum-layout {
        grid-template-columns: 1fr;
    }
    .forum-sidebar {
        position: static;
    }
    .forum-post-item {
        grid-template-columns: 40px 1fr;
    }
    .forum-post__stats {
        display: none;
    }
}

@media (max-width: 768px) {
    .forum-header__logo-text { display: none; }
    .forum-search__input { width: 160px; }
    .forum-search__input:focus { width: 200px; }
    .forum-header__nav { display: none; }
    .forum-footer__inner { grid-template-columns: 1fr; }
    .forum-footer__links { flex-wrap: wrap; }
    .forum-log-hero__title { font-size: 20px; }
    .forum-comment-form__fields { grid-template-columns: 1fr; }
    .forum-post-item { padding: 12px; }
    .forum-post__avatar { width: 36px; height: 36px; }
    .forum-layout { padding: var(--space-md) 0; gap: var(--space-md); }
}

/* ---------- 空状态 ---------- */
.forum-empty {
    text-align: center;
    padding: 60px var(--space-lg);
    color: var(--forum-text-dim);
}
.forum-empty i { font-size: 48px; display: block; margin-bottom: var(--space-md); opacity: 0.4; }
.forum-empty p { font-size: 14px; }

/* ---------- 加载动画 ---------- */
@keyframes forumFadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}
.forum-post-item { animation: forumFadeIn 0.3s ease both; }
.forum-post-item:nth-child(1) { animation-delay: 0s; }
.forum-post-item:nth-child(2) { animation-delay: 0.05s; }
.forum-post-item:nth-child(3) { animation-delay: 0.10s; }
.forum-post-item:nth-child(4) { animation-delay: 0.15s; }
.forum-post-item:nth-child(5) { animation-delay: 0.20s; }
.forum-post-item:nth-child(n+6) { animation-delay: 0.25s; }

/* 发光效果 */
@keyframes forumGlow {
    0%, 100% { box-shadow: 0 0 8px var(--forum-primary-glow); }
    50% { box-shadow: 0 0 20px var(--forum-primary-glow); }
}
.forum-btn--primary:hover { animation: forumGlow 1.5s ease-in-out infinite; }

/* 浮动公告 */
.forum-announce {
    background: linear-gradient(135deg, rgba(249, 115, 22, 0.1) 0%, rgba(239, 68, 68, 0.08) 100%);
    border: 1px solid rgba(249, 115, 22, 0.25);
    border-radius: var(--forum-radius);
    padding: 10px 16px;
    margin-bottom: var(--space-md);
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-size: 13px;
    color: var(--forum-orange);
}
.forum-announce i { font-size: 18px; flex-shrink: 0; margin-top: 1px; }

/* ---------- 昼夜主题切换 ---------- */
.forum-theme-toggle {
    position: relative;
    min-width: 38px;
    min-height: 38px;
}
.forum-theme-toggle .forum-theme-icon {
    font-size: 20px;
    line-height: 1;
}
html[data-theme="dark"] .forum-theme-icon--when-light { display: none !important; }
html[data-theme="dark"] .forum-theme-icon--when-dark { display: inline-block; }
html[data-theme="light"] .forum-theme-icon--when-dark { display: none !important; }
html[data-theme="light"] .forum-theme-icon--when-light { display: inline-block; }

/* 浅色主题（覆盖 CSS 变量 + 少量硬编码色） */
html[data-theme="light"] {
    --forum-bg: #f1f5f9;
    --forum-surface: #ffffff;
    --forum-surface-2: #f8fafc;
    --forum-border: #e2e8f0;
    --forum-border-light: #cbd5e1;
    --forum-primary-glow: rgba(59, 130, 246, 0.22);
    --forum-green-bg: rgba(34, 197, 94, 0.14);
    --forum-red-bg: rgba(239, 68, 68, 0.1);
    --forum-text: #0f172a;
    --forum-text-muted: #64748b;
    --forum-text-dim: #94a3b8;
    --forum-shadow: 0 4px 24px rgba(15, 23, 42, 0.06);
}

html[data-theme="light"] .forum-header {
    background: linear-gradient(135deg, #ffffff 0%, #f1f5f9 100%);
}

html[data-theme="light"] .forum-header__logo-text {
    color: var(--forum-text);
}

html[data-theme="light"] .forum-nav-item:hover {
    color: var(--forum-text);
}

html[data-theme="light"] ::selection {
    background: rgba(59, 130, 246, 0.22);
    color: var(--forum-text);
}

html[data-theme="light"] .forum-post-item:hover {
    box-shadow: 0 4px 16px rgba(15, 23, 42, 0.08);
}

html[data-theme="light"] .forum-log-hero__title {
    color: var(--forum-text);
}