/* HackerHub - 现代科技感风格 */

:root {
    --primary: #00d4ff;
    --primary-dark: #00a8cc;
    --secondary: #ff6b6b;
    --accent: #a855f7;
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-card: #161620;
    --bg-hover: #252535;
    --text-primary: #ffffff;
    --text-secondary: #a0a0b0;
    --text-muted: #6b6b7b;
    --border-color: #2a2a3a;
    --border-light: #3a3a4a;
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

a {
    color: var(--primary);
    text-decoration: none;
}

a:hover {
    color: var(--primary-dark);
}

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 10, 15, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.nav-logo i {
    color: var(--primary);
}

.nav-search {
    flex: 1;
    max-width: 400px;
}

.nav-search form {
    position: relative;
}

.nav-search input {
    width: 100%;
    padding: 10px 40px 10px 16px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    color: var(--text-primary);
    font-size: 0.9rem;
}

.nav-search input:focus {
    outline: none;
    border-color: var(--primary);
}

.nav-search button {
    position: absolute;
    right: 5px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--text-muted);
    padding: 8px 12px;
    cursor: pointer;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-link {
    padding: 8px 16px;
    color: var(--text-secondary);
    font-weight: 500;
    border-radius: var(--radius-md);
    transition: all 0.3s;
}

.nav-link:hover {
    color: var(--primary);
    background: var(--bg-hover);
}

.nav-dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    margin-top: 10px;
    min-width: 200px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s;
    z-index: 100;
}

.dropdown-right {
    left: auto;
    right: 0;
}

.nav-dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-color);
    transition: all 0.3s;
}

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

.dropdown-item:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.dropdown-divider {
    height: 1px;
    background: var(--border-color);
    margin: 8px 0;
}

.category-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.nav-user {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 12px;
    color: var(--text-secondary);
    border-radius: 20px;
}

.nav-user:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.nav-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
}

/* 按钮 */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    font-size: 0.9rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 20px rgba(0, 212, 255, 0.3);
}

.btn-outline {
    background: transparent;
    color: var(--primary);
    border: 1px solid var(--primary);
}

.btn-outline:hover {
    background: var(--primary);
    color: white;
}

.btn-secondary {
    background: var(--bg-hover);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

/* 主内容区 */
.main-content {
    margin-top: 70px;
    min-height: calc(100vh - 70px);
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 40px 20px;
}

/* Hero区域 */
.hero {
    padding: 80px 20px;
    text-align: center;
    background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
}

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 20px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
}

/* 访问统计栏 */
.stats-bar {
    display: flex;
    flex-direction: row;
    justify-content: center;
    align-items: center;
    gap: 50px;
    padding: 0 20px;
    margin-top: 40px;
}

.stat-item {
    display: flex;
    align-items: center;
    gap: 12px;
}

.stat-item i {
    font-size: 1.8rem;
    color: var(--primary);
    opacity: 0.8;
}

.stat-item div {
    display: flex;
    flex-direction: column;
}

.stat-number {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.2;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* 内容网格 */
.content-grid {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: 30px;
}

/* 文章卡片 */
.post-card {
    display: flex;
    gap: 20px;
    padding: 24px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    margin-bottom: 20px;
    transition: all 0.3s;
}

.post-card:hover {
    border-color: var(--border-light);
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.post-cover {
    width: 200px;
    height: 140px;
    border-radius: var(--radius-md);
    object-fit: cover;
    flex-shrink: 0;
}

.post-content {
    flex: 1;
}

.post-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
    flex-wrap: wrap;
}

.post-category {
    padding: 4px 12px;
    background: var(--bg-hover);
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    font-weight: 500;
}

.post-title {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.post-title:hover {
    color: var(--primary);
}

.post-excerpt {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: 15px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.post-footer {
    display: flex;
    align-items: center;
    gap: 20px;
    color: var(--text-muted);
    font-size: 0.85rem;
}

.post-author {
    display: flex;
    align-items: center;
    gap: 8px;
}

.post-author img {
    width: 24px;
    height: 24px;
    border-radius: 50%;
}

/* 侧边栏 */
.sidebar {
    position: sticky;
    top: 90px;
    height: fit-content;
}

.sidebar-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 20px;
    margin-bottom: 20px;
}

.sidebar-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border-color);
}

.sidebar-list {
    list-style: none;
}

.sidebar-list li {
    padding: 10px 0;
    border-bottom: 1px solid var(--border-color);
}

.sidebar-list li:last-child {
    border-bottom: none;
}

.sidebar-list a {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-secondary);
}

.sidebar-list a:hover {
    color: var(--primary);
}

/* 分类网格 */
.category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 20px;
    margin-top: 30px;
}

.category-card {
    padding: 30px 20px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    text-align: center;
    transition: all 0.3s;
}

.category-card:hover {
    border-color: var(--primary);
    transform: translateY(-5px);
}

.category-icon {
    font-size: 2.5rem;
    margin-bottom: 15px;
}

.category-name {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 5px;
}

.category-count {
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* 文章详情 */
.post-detail {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 40px;
}

.post-header {
    margin-bottom: 30px;
    padding-bottom: 30px;
    border-bottom: 1px solid var(--border-color);
}

.post-header .post-title {
    font-size: 2rem;
    margin-bottom: 20px;
}

.post-body {
    font-size: 1.05rem;
    line-height: 1.8;
    color: var(--text-secondary);
}

.post-body h2, .post-body h3 {
    color: var(--text-primary);
    margin: 30px 0 15px;
}

.post-body p {
    margin-bottom: 15px;
}

.post-body pre {
    background: var(--bg-secondary);
    padding: 20px;
    border-radius: var(--radius-md);
    overflow-x: auto;
    margin: 20px 0;
    border: 1px solid var(--border-color);
}

.post-body code {
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 0.9rem;
}

.post-body pre code {
    background: none;
    padding: 0;
}

.post-body ul, .post-body ol {
    margin: 15px 0;
    padding-left: 25px;
}

.post-body li {
    margin-bottom: 8px;
    line-height: 1.7;
}

.post-body strong {
    color: var(--primary);
}

.post-body table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
}

.post-body table td, .post-body table th {
    padding: 10px 15px;
    border: 1px solid var(--border-color);
}

.post-body a {
    color: var(--primary);
    text-decoration: none;
}

.post-body a:hover {
    text-decoration: underline;
}

.post-body hr {
    border: none;
    border-top: 1px solid var(--border-color);
    margin: 30px 0;
}

/* 评论区 */
.comments-section {
    margin-top: 40px;
    padding-top: 40px;
    border-top: 1px solid var(--border-color);
}

.comments-title {
    font-size: 1.3rem;
    margin-bottom: 20px;
}

.comment-form {
    margin-bottom: 30px;
}

.comment-form textarea {
    width: 100%;
    padding: 15px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 1rem;
    resize: vertical;
    min-height: 100px;
}

.comment-form textarea:focus {
    outline: none;
    border-color: var(--primary);
}

.comment-item {
    display: flex;
    gap: 15px;
    padding: 20px 0;
    border-bottom: 1px solid var(--border-color);
}

.comment-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    flex-shrink: 0;
}

.comment-content {
    flex: 1;
}

.comment-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 8px;
}

.comment-author {
    font-weight: 600;
    color: var(--text-primary);
}

.comment-time {
    color: var(--text-muted);
    font-size: 0.85rem;
}

.comment-text {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* 表单样式 */
.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-secondary);
}

.form-input {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 1rem;
}

.form-input:focus {
    outline: none;
    border-color: var(--primary);
}

.form-textarea {
    min-height: 200px;
    resize: vertical;
}

/* 认证页面 */
.auth-container {
    max-width: 400px;
    margin: 60px auto;
    padding: 40px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
}

.auth-title {
    text-align: center;
    font-size: 1.8rem;
    margin-bottom: 30px;
}

.auth-footer {
    text-align: center;
    margin-top: 20px;
    color: var(--text-muted);
}

/* 消息提示 */
.alert {
    padding: 15px 20px;
    border-radius: var(--radius-md);
    margin-bottom: 20px;
}

.alert-success {
    background: rgba(34, 197, 94, 0.1);
    border: 1px solid var(--success);
    color: var(--success);
}

.alert-error {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid var(--secondary);
    color: var(--secondary);
}

/* 分页 */
.pagination {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 40px;
}

.page-link {
    padding: 10px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    transition: all 0.3s;
}

.page-link:hover, .page-link.active {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
}

/* 页脚 */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 60px 20px 30px;
}

.footer-container {
    max-width: 1400px;
    margin: 0 auto;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h3, .footer-section h4 {
    margin-bottom: 20px;
    color: var(--text-primary);
}

.footer-section p {
    color: var(--text-secondary);
    line-height: 1.7;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-links a {
    color: var(--text-secondary);
}

.footer-links a:hover {
    color: var(--primary);
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
}

/* ============================================
   看雪风格论坛样式 (Kanxue-style Forum)
   ============================================ */

/* 论坛面包屑 */
.forum-breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 0;
    font-size: 0.9rem;
    color: var(--text-muted);
}
.forum-breadcrumb a {
    color: var(--text-secondary);
}
.forum-breadcrumb a:hover {
    color: var(--primary);
}
.forum-breadcrumb .sep {
    color: var(--text-muted);
}

/* 论坛统计卡片 */
.forum-stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    margin-bottom: 30px;
}
.forum-stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 18px 16px;
    text-align: center;
    transition: all 0.3s;
}
.forum-stat-card:hover {
    border-color: var(--primary);
}
.forum-stat-num {
    font-size: 1.8rem;
    font-weight: 700;
    line-height: 1.2;
}
.forum-stat-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 4px;
}

/* 板块列表 - 看雪风格表格 */
.board-table {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
}
.board-table-header {
    display: grid;
    grid-template-columns: 1fr 80px 80px 80px 260px;
    padding: 12px 0;
    background: var(--bg-secondary);
    border-bottom: 2px solid var(--border-color);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
}
.board-table-header span {
    text-align: center;
}
.board-table-header span:first-child {
    text-align: left;
    padding-left: 80px;
}
.board-table-header span:last-child {
    text-align: left;
    padding-left: 20px;
}
.board-row {
    display: grid;
    grid-template-columns: 1fr 80px 80px 80px 260px;
    align-items: center;
    padding: 14px 0;
    border-bottom: 1px solid var(--border-color);
    transition: background 0.2s;
}
.board-row:last-child {
    border-bottom: none;
}
.board-row:hover {
    background: var(--bg-hover);
}
.board-row .board-info {
    display: flex;
    align-items: center;
    gap: 14px;
    padding-left: 20px;
}
.board-icon {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 1.2rem;
}
.board-detail h4 {
    margin: 0 0 4px 0;
    font-size: 1rem;
    font-weight: 600;
}
.board-detail h4 a {
    color: var(--text-primary);
    text-decoration: none;
}
.board-detail h4 a:hover {
    color: var(--primary);
}
.board-detail .board-desc {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin: 0;
    line-height: 1.4;
}
.board-stat {
    text-align: center;
    font-size: 0.9rem;
    color: var(--text-secondary);
}
.board-stat .num {
    font-weight: 600;
    color: var(--text-primary);
}
.board-stat .today {
    color: var(--primary);
}
.board-last-post {
    padding-right: 16px;
    font-size: 0.85rem;
}
.board-last-post a {
    color: var(--text-secondary);
    display: block;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 230px;
}
.board-last-post a:hover {
    color: var(--primary);
}
.board-last-post .last-info {
    color: var(--text-muted);
    font-size: 0.8rem;
    margin-top: 2px;
}

/* 板块分类标题 */
.board-category-header {
    padding: 12px 20px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 10px;
}
.board-category-header .cat-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    flex-shrink: 0;
}

/* 主题列表 - 看雪风格 */
.topic-table {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
}
.topic-table-header {
    display: grid;
    grid-template-columns: 1fr 140px 100px 160px;
    padding: 12px 0;
    background: var(--bg-secondary);
    border-bottom: 2px solid var(--border-color);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-muted);
}
.topic-table-header span {
    text-align: center;
}
.topic-table-header span:first-child {
    text-align: left;
    padding-left: 20px;
}
.topic-row {
    display: grid;
    grid-template-columns: 1fr 140px 100px 160px;
    align-items: center;
    padding: 14px 0;
    border-bottom: 1px solid var(--border-color);
    transition: background 0.2s;
}
.topic-row:last-child {
    border-bottom: none;
}
.topic-row:hover {
    background: var(--bg-hover);
}
.topic-row.pinned {
    background: rgba(255, 165, 0, 0.05);
}
.topic-row.pinned:hover {
    background: rgba(255, 165, 0, 0.1);
}
.topic-title-col {
    padding-left: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}
.topic-type-badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 3px;
    font-size: 0.75rem;
    font-weight: 600;
    white-space: nowrap;
    flex-shrink: 0;
}
.badge-pinned {
    background: rgba(255, 165, 0, 0.2);
    color: #ffa500;
}
.badge-locked {
    background: rgba(150, 150, 150, 0.2);
    color: #999;
}
.badge-original {
    background: rgba(0, 212, 255, 0.15);
    color: var(--primary);
}
.badge-hot {
    background: rgba(255, 107, 107, 0.15);
    color: var(--secondary);
}
.topic-title-col .topic-link {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.topic-title-col .topic-link:hover {
    color: var(--primary);
}
.topic-author {
    text-align: center;
    font-size: 0.85rem;
}
.topic-author .author-name {
    color: var(--text-secondary);
}
.topic-stats {
    text-align: center;
    font-size: 0.85rem;
    color: var(--text-muted);
}
.topic-stats .reply-count {
    color: var(--text-primary);
    font-weight: 600;
}
.topic-last {
    text-align: center;
    font-size: 0.85rem;
    color: var(--text-muted);
}
.topic-last .last-user {
    color: var(--text-secondary);
}

/* 帖子详情 - 看雪风格 */
.post-list {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
}
.post-item {
    display: flex;
    border-bottom: 1px solid var(--border-color);
}
.post-item:last-child {
    border-bottom: none;
}
.post-sidebar {
    width: 180px;
    flex-shrink: 0;
    padding: 25px 20px;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    text-align: center;
}
.post-avatar {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    margin: 0 auto 10px;
    display: block;
    border: 2px solid var(--border-color);
}
.post-sidebar .post-username {
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--text-primary);
    margin-bottom: 8px;
    word-break: break-all;
}
.post-sidebar .post-user-badge {
    display: inline-block;
    padding: 2px 10px;
    border-radius: 3px;
    font-size: 0.7rem;
    margin-bottom: 8px;
}
.post-sidebar .post-user-stat {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin: 4px 0;
}
.post-main {
    flex: 1;
    padding: 25px 30px;
    min-width: 0;
}
.post-header-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 1px solid var(--border-color);
}
.post-number {
    font-weight: 600;
    color: var(--primary);
    font-size: 0.95rem;
}
.post-time {
    font-size: 0.85rem;
    color: var(--text-muted);
}
.post-body {
    font-size: 0.95rem;
    line-height: 1.8;
    color: var(--text-secondary);
    word-wrap: break-word;
}
.post-body p {
    margin-bottom: 15px;
}
.post-body pre {
    background: var(--bg-secondary);
    padding: 16px;
    border-radius: var(--radius-sm);
    overflow-x: auto;
    margin: 16px 0;
    border: 1px solid var(--border-color);
}
.post-body code {
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 0.9rem;
}
.post-body pre code {
    background: none;
    padding: 0;
}
.post-body blockquote {
    border-left: 3px solid var(--primary);
    padding: 10px 16px;
    margin: 16px 0;
    background: rgba(0, 212, 255, 0.05);
    color: var(--text-secondary);
}

/* 回复表单 - 看雪风格 */
.reply-form-section {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 25px;
    margin-top: 25px;
}
.reply-form-section h3 {
    margin: 0 0 15px 0;
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    gap: 10px;
}
.reply-form-section textarea {
    width: 100%;
    padding: 14px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 0.95rem;
    resize: vertical;
    min-height: 140px;
    line-height: 1.6;
    font-family: inherit;
}
.reply-form-section textarea:focus {
    outline: none;
    border-color: var(--primary);
}
.reply-form-actions {
    margin-top: 15px;
    display: flex;
    justify-content: flex-end;
}

/* 板块头部 */
.board-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 25px;
}
.board-header-info h1 {
    margin: 0 0 8px 0;
    font-size: 1.6rem;
    display: flex;
    align-items: center;
    gap: 12px;
}
.board-header-info p {
    color: var(--text-muted);
    margin: 0;
    font-size: 0.95rem;
}

/* 分页条 */
.forum-pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    padding: 25px 0;
}
.forum-pagination a,
.forum-pagination span {
    padding: 8px 14px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.2s;
    background: var(--bg-card);
}
.forum-pagination a:hover {
    border-color: var(--primary);
    color: var(--primary);
}
.forum-pagination .current {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
    font-weight: 600;
}
.forum-pagination .disabled {
    opacity: 0.5;
    pointer-events: none;
}

/* 发帖表单 */
.topic-form-container {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 30px;
    max-width: 860px;
}
.topic-form-container .form-group {
    margin-bottom: 22px;
}
.topic-form-container label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-secondary);
    font-size: 0.95rem;
}
.topic-form-container select,
.topic-form-container input[type="text"] {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 0.95rem;
    font-family: inherit;
}
.topic-form-container select:focus,
.topic-form-container input[type="text"]:focus {
    outline: none;
    border-color: var(--primary);
}
.topic-form-container textarea {
    width: 100%;
    padding: 14px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 0.95rem;
    resize: vertical;
    min-height: 200px;
    line-height: 1.6;
    font-family: inherit;
}
.topic-form-container textarea:focus {
    outline: none;
    border-color: var(--primary);
}
.topic-form-actions {
    display: flex;
    gap: 12px;
}

/* 空状态 */
.forum-empty {
    text-align: center;
    padding: 50px 20px;
    color: var(--text-muted);
}
.forum-empty i {
    font-size: 3rem;
    margin-bottom: 15px;
    display: block;
    opacity: 0.5;
}
.forum-empty p {
    font-size: 1rem;
}

/* 论坛响应式 */
/* 中屏: 隐藏侧边栏 + 隐藏"帖数"和"今日"列，保留 板块|主题|最新发表 */
@media (max-width: 1100px) {
    .forum-layout-sidebar {
        grid-template-columns: 1fr !important;
    }
    .forum-layout-sidebar > .sidebar {
        display: none;
    }
    /* 隐藏 帖数 + 今日 列（表头+数据行） */
    .hcol-posts, .hcol-today,
    .col-posts, .col-today {
        display: none;
    }
    /* 3列: 板块 | 主题 | 最新发表 */
    .board-table-header,
    .board-row {
        grid-template-columns: 1fr 60px 180px;
    }
    .board-table-header .hcol-name { padding-left: 60px; }
}

/* 小屏: 进一步隐藏"最新发表"列，保留 板块|主题 */
@media (max-width: 750px) {
    .hcol-last,
    .col-last {
        display: none;
    }
    /* 2列: 板块 | 主题 */
    .board-table-header,
    .board-row {
        grid-template-columns: 1fr 50px;
    }
    .board-table-header .hcol-name { padding-left: 50px; }
    
    .topic-table-header,
    .topic-row {
        grid-template-columns: 1fr 60px;
    }
    .topic-table-header span:nth-child(3),
    .topic-table-header span:nth-child(4),
    .topic-row .topic-stats,
    .topic-row .topic-last { display: none; }
    
    .post-item {
        flex-direction: column;
    }
    .post-sidebar {
        width: 100%;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
        display: flex;
        align-items: center;
        gap: 12px;
        padding: 15px 20px;
        text-align: left;
        flex-wrap: wrap;
    }
    .post-avatar {
        width: 40px;
        height: 40px;
        margin: 0;
    }
    .forum-stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .board-header {
        flex-direction: column;
        gap: 15px;
    }
}

/* 响应式 */
@media (max-width: 1024px) {
    .content-grid {
        grid-template-columns: 1fr;
    }
    
    .sidebar {
        position: static;
    }
}

@media (max-width: 768px) {
    .nav-search {
        display: none;
    }
    
    .nav-links {
        display: none;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .stats-bar {
        gap: 20px;
        flex-wrap: wrap;
        padding: 20px 15px;
    }
    
    .stat-item i {
        font-size: 1.4rem;
    }
    
    .stat-number {
        font-size: 1.1rem;
    }
    
    .post-card {
        flex-direction: column;
    }
    
    .post-cover {
        width: 100%;
        height: 200px;
    }
    
    .category-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
}

/* ========== 个人主页 ========== */

.profile-header {
    position: relative;
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    overflow: hidden;
    margin-bottom: 24px;
    border: 1px solid var(--border-color);
}

.profile-cover {
    height: 120px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 50%, var(--secondary) 100%);
    opacity: 0.3;
}

.profile-info {
    display: flex;
    align-items: flex-start;
    gap: 24px;
    padding: 0 32px 32px 32px;
    margin-top: -50px;
    position: relative;
    z-index: 1;
}

.profile-avatar-wrapper {
    flex-shrink: 0;
}

.profile-avatar {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    border: 4px solid var(--bg-card);
    background: var(--bg-secondary);
    box-shadow: 0 4px 12px rgba(0,0,0,0.3);
}

.profile-details {
    flex: 1;
    min-width: 0;
    padding-top: 8px;
}

.profile-name {
    font-size: 1.6rem;
    font-weight: 700;
    margin: 0 0 8px 0;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.profile-badge {
    font-size: 0.75rem;
    padding: 3px 10px;
    border-radius: 20px;
    font-weight: 500;
}

.badge-admin {
    background: rgba(255,107,107,0.2);
    color: var(--secondary);
    border: 1px solid rgba(255,107,107,0.3);
}

.profile-bio {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin: 0 0 12px 0;
    line-height: 1.6;
}

.profile-meta {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.meta-item {
    color: var(--text-muted);
    font-size: 0.85rem;
    display: flex;
    align-items: center;
    gap: 6px;
}

.meta-item i {
    font-size: 0.8rem;
}

/* 统计卡片 */
.profile-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    margin-bottom: 32px;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 16px;
    transition: transform 0.2s, border-color 0.2s;
}

.stat-card:hover {
    transform: translateY(-2px);
    border-color: var(--border-light);
}

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    flex-shrink: 0;
}

.stat-info {
    display: flex;
    flex-direction: column;
}

.stat-num {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.2;
}

.stat-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 2px;
}

/* 内容区域 */
.profile-content {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.profile-section {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.section-header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-color);
}

.section-header h2 {
    margin: 0;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 10px;
}

.section-header h2 i {
    color: var(--primary);
    font-size: 1rem;
}

.profile-empty {
    padding: 48px 24px;
    text-align: center;
    color: var(--text-muted);
}

.profile-empty i {
    font-size: 2.5rem;
    margin-bottom: 12px;
    display: block;
    opacity: 0.4;
}

.profile-empty p {
    margin: 0;
    font-size: 0.95rem;
}

/* 文章/帖子列表项 */
.article-list {
    display: flex;
    flex-direction: column;
}

.article-item {
    display: block;
    padding: 16px 24px;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
    transition: background 0.2s;
}

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

.article-item:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.article-title {
    font-size: 0.95rem;
    font-weight: 500;
    margin: 0 0 8px 0;
    color: var(--text-primary);
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.article-item:hover .article-title {
    color: var(--primary);
}

.article-meta {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    font-size: 0.8rem;
    color: var(--text-muted);
}

.article-meta span {
    display: flex;
    align-items: center;
    gap: 4px;
}

/* 响应式 */
@media (max-width: 768px) {
    .profile-stats {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .profile-info {
        flex-direction: column;
        align-items: center;
        text-align: center;
        padding: 0 20px 24px 20px;
    }
    
    .profile-meta {
        justify-content: center;
    }
    
    .profile-name {
        justify-content: center;
    }
    
    .article-item {
        padding: 14px 16px;
    }
    
    .section-header {
        padding: 16px 16px;
    }
}

@media (max-width: 480px) {
    .profile-stats {
        grid-template-columns: 1fr 1fr;
        gap: 10px;
    }
    
    .stat-card {
        padding: 14px;
        gap: 10px;
    }
    
    .stat-icon {
        width: 36px;
        height: 36px;
        font-size: 1rem;
    }
    
    .stat-num {
        font-size: 1.2rem;
    }
}

/* ========== 设置页面 ========== */

.settings-container {
    display: flex;
    gap: 28px;
    max-width: 1000px;
    margin: 0 auto;
    align-items: flex-start;
}

.settings-sidebar {
    width: 220px;
    flex-shrink: 0;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    position: sticky;
    top: 90px;
}

.settings-sidebar-title {
    padding: 20px 20px 16px 20px;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
    display: flex;
    align-items: center;
    gap: 8px;
    border-bottom: 1px solid var(--border-color);
}

.settings-sidebar-title i {
    color: var(--primary);
}

.settings-nav {
    padding: 8px;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.settings-nav-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 0.9rem;
    transition: all 0.2s;
}

.settings-nav-item:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.settings-nav-item.active {
    background: rgba(0,212,255,0.1);
    color: var(--primary);
    font-weight: 500;
}

.settings-nav-item i {
    width: 18px;
    text-align: center;
    font-size: 0.85rem;
}

.settings-main {
    flex: 1;
    min-width: 0;
}

.settings-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.settings-card-header {
    padding: 24px 28px 20px 28px;
    border-bottom: 1px solid var(--border-color);
}

.settings-card-header h2 {
    margin: 0 0 6px 0;
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 10px;
}

.settings-card-header h2 i {
    color: var(--primary);
    font-size: 1rem;
}

.settings-card-desc {
    margin: 0;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.settings-card-body {
    padding: 28px;
}

.settings-form {
    max-width: 520px;
}

.settings-form .form-group {
    margin-bottom: 22px;
}

.settings-form .form-label {
    margin-bottom: 6px;
}

.settings-form .form-input[disabled] {
    opacity: 0.6;
    cursor: not-allowed;
    background: var(--bg-secondary);
}

.form-hint {
    display: block;
    margin-top: 5px;
    font-size: 0.78rem;
    color: var(--text-muted);
}

.form-textarea {
    min-height: 100px;
    resize: vertical;
    font-family: inherit;
    padding: 12px 14px;
    line-height: 1.6;
}

.form-actions {
    margin-top: 28px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

/* 头像编辑行 */
.avatar-edit-row {
    display: flex;
    align-items: flex-start;
    gap: 16px;
}

.avatar-preview {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    border: 2px solid var(--border-color);
    flex-shrink: 0;
    background: var(--bg-secondary);
}

.avatar-edit-input {
    flex: 1;
    min-width: 0;
}

/* 响应式 */
@media (max-width: 768px) {
    .settings-container {
        flex-direction: column;
        gap: 20px;
    }

    .settings-sidebar {
        width: 100%;
        position: static;
    }

    .settings-nav {
        flex-direction: row;
        flex-wrap: wrap;
        gap: 4px;
        padding: 10px 12px;
    }

    .settings-nav-item {
        padding: 8px 14px;
        font-size: 0.85rem;
    }

    .settings-sidebar-title {
        padding: 14px 16px 12px 16px;
    }

    .settings-card-header {
        padding: 18px 18px 14px 18px;
    }

    .settings-card-body {
        padding: 18px;
    }

    .avatar-edit-row {
        flex-direction: column;
        align-items: center;
    }
}