/* OSS Community 样式 - 已对齐官网视觉规范 */
:root {
    --bg: #030712;
    --bg-card: rgba(255, 255, 255, 0.02);
    --border: rgba(255, 255, 255, 0.05);
    --border-hover: rgba(6, 182, 212, 0.3);
    --cyan: #06b6d4;
    --cyan-light: #22d3ee;
    --text: #fff;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
}

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

body {
    font-family: 'Inter', sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
}

/* 全局背景网格 */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    background-image: 
        linear-gradient(rgba(6, 182, 212, 0.03) 1px, transparent 1px), 
        linear-gradient(90deg, rgba(6, 182, 212, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    pointer-events: none;
    z-index: -1;
}

/* 头部导航 */
.comm-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(3, 7, 18, 0.8);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
    transition: border-color 0.3s;
}

.header-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 24px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 24px;
}

.back-link {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 14px;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 4px;
}

.back-link:hover {
    color: var(--cyan-light);
    transform: translateX(-4px);
}

.site-title {
    font-size: 18px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--cyan), #3b82f6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: 0.02em;
}

.btn {
    padding: 10px 20px;
    border-radius: 10px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 6px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--cyan), #3b82f6);
    color: #fff;
    box-shadow: 0 4px 12px rgba(6, 182, 212, 0.1);
}

.btn-primary:hover {
    box-shadow: 0 8px 24px rgba(6, 182, 212, 0.4);
    transform: translateY(-2px);
}

/* 主布局 */
.comm-main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 24px 100px 24px 24px; /* 右侧为 Dock 留空间 */
    min-height: calc(100vh - 64px);
}

.comm-container {
    display: grid;
    grid-template-columns: 260px 1fr;
    gap: 32px;
    animation: fadeInUp 0.6s ease forwards;
    opacity: 0;
    transform: translateY(20px);
}

@keyframes fadeInUp {
    to { opacity: 1; transform: translateY(0); }
}

/* 侧边栏 */
.comm-sidebar {
    position: sticky;
    top: 88px;
    height: fit-content;
}

.sidebar-section {
    background: rgba(10, 15, 30, 0.6);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 20px;
    margin-bottom: 20px;
    backdrop-filter: blur(8px);
    transition: all 0.3s ease;
}

.sidebar-section:hover {
    border-color: rgba(255, 255, 255, 0.1);
}

.sidebar-section h3 {
    font-size: 12px;
    font-weight: 700;
    color: var(--text-muted);
    margin-bottom: 16px;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

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

.category-list li {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.25s ease;
    margin-bottom: 4px;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
}

.category-list li:hover {
    background: rgba(255, 255, 255, 0.04);
    color: #fff;
    transform: translateX(4px);
}

.category-list li.active {
    background: rgba(6, 182, 212, 0.1);
    border-left: 3px solid var(--cyan);
    color: var(--cyan-light);
}

.cat-icon {
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0.7;
}

.cat-icon svg {
    width: 16px;
    height: 16px;
    fill: none;
    stroke: currentColor;
    stroke-width: 2;
}

.category-list li.active .cat-icon { opacity: 1; color: var(--cyan); }

.cat-count {
    font-size: 11px;
    color: var(--text-muted);
    background: rgba(255, 255, 255, 0.03);
    padding: 2px 8px;
    border-radius: 6px;
    font-weight: 600;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    text-align: center;
}

.stat-item {
    padding: 10px 4px;
    background: rgba(255, 255, 255, 0.02);
    border-radius: 8px;
}

.stat-num {
    display: block;
    font-size: 20px;
    font-weight: 800;
    color: var(--cyan-light);
    margin-bottom: 4px;
}

.stat-label {
    font-size: 10px;
    color: var(--text-muted);
    font-weight: 500;
    text-transform: uppercase;
}

/* 内容区 */
.comm-content { min-width: 0; }

.content-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border);
}

.content-header h2 {
    font-size: 22px;
    font-weight: 700;
    color: #fff;
    display: flex;
    align-items: center;
    gap: 10px;
}

.content-header h2::before {
    content: '';
    display: block;
    width: 4px;
    height: 20px;
    background: var(--cyan);
    border-radius: 2px;
}

.sort-options {
    display: flex;
    gap: 8px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 4px;
}

.sort-btn {
    padding: 6px 14px;
    border-radius: 8px;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.sort-btn:hover { color: #fff; }

.sort-btn.active {
    background: rgba(6, 182, 212, 0.15);
    color: var(--cyan-light);
    box-shadow: 0 2px 6px rgba(6, 182, 212, 0.1);
}

/* 帖子列表 - 卡片动效 */
.posts-list { display: flex; flex-direction: column; gap: 16px; }

.post-card {
    background: rgba(10, 15, 30, 0.6);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 24px;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    cursor: pointer;
    position: relative;
    overflow: hidden;
    animation: cardEnter 0.5s ease forwards;
    opacity: 0;
    transform: translateY(20px);
}

@keyframes cardEnter {
    to { opacity: 1; transform: translateY(0); }
}

.post-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: linear-gradient(135deg, rgba(6, 182, 212, 0.05), transparent);
    opacity: 0;
    transition: opacity 0.4s;
}

.post-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-4px) scale(1.005);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.4), 0 0 12px rgba(6, 182, 212, 0.1);
}

.post-card:hover::before { opacity: 1; }

.post-header {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 14px;
    position: relative;
    z-index: 1;
}

.post-avatar {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--cyan), #3b82f6);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 18px;
    color: #fff;
    box-shadow: 0 4px 10px rgba(6, 182, 212, 0.3);
    flex-shrink: 0;
}

.post-meta { flex: 1; min-width: 0; }

.post-author {
    font-weight: 600;
    font-size: 14px;
    color: #fff;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.post-time {
    font-size: 12px;
    color: var(--text-muted);
}

.post-tags { display: flex; gap: 6px; flex-shrink: 0; }

.tag {
    padding: 3px 8px;
    border-radius: 6px;
    font-size: 11px;
    font-weight: 600;
    background: rgba(6, 182, 212, 0.08);
    border: 1px solid rgba(6, 182, 212, 0.15);
    color: var(--cyan-light);
    text-transform: uppercase;
}

.pinned-badge {
    padding: 3px 8px;
    border-radius: 6px;
    font-size: 11px;
    font-weight: 700;
    background: rgba(245, 158, 11, 0.15);
    border: 1px solid rgba(245, 158, 11, 0.3);
    color: #fbbf24;
    display: flex;
    align-items: center;
    gap: 4px;
}

.post-title {
    font-size: 17px;
    font-weight: 700;
    margin-bottom: 8px;
    display: flex;
    align-items: flex-start;
    gap: 8px;
    position: relative;
    z-index: 1;
    color: #fff;
    transition: color 0.2s;
}

.post-card:hover .post-title { color: var(--cyan-light); }

.post-excerpt {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 14px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    position: relative;
    z-index: 1;
}

.post-stats {
    display: flex;
    gap: 20px;
    font-size: 12px;
    color: var(--text-muted);
    font-weight: 500;
    position: relative;
    z-index: 1;
}

.post-stats span { 
    display: flex; 
    align-items: center; 
    gap: 6px;
    transition: color 0.2s;
}

.post-stats svg {
    width: 14px;
    height: 14px;
    opacity: 0.6;
}

.post-card:hover .post-stats span { color: var(--text-secondary); }

/* 空状态 / 加载动画 */
.empty-state {
    text-align: center;
    padding: 80px 20px;
    color: var(--text-muted);
    animation: fadeIn 0.5s ease;
}

@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

.loading-spinner {
    width: 32px;
    height: 32px;
    border: 3px solid rgba(6, 182, 212, 0.1);
    border-top-color: var(--cyan);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: 0 auto 16px;
}

@keyframes spin { to { transform: rotate(360deg); } }

.empty-state-icon {
    font-size: 48px;
    margin-bottom: 16px;
    opacity: 0.4;
}

/* 分页 */
.pagination {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 32px;
    padding-bottom: 32px;
}

.page-btn {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 14px;
}

.page-btn:hover {
    background: rgba(6, 182, 212, 0.1);
    border-color: var(--border-hover);
    color: var(--cyan);
    transform: translateY(-2px);
}

.page-btn.active {
    background: var(--cyan);
    border-color: var(--cyan);
    color: #fff;
    box-shadow: 0 4px 12px rgba(6, 182, 212, 0.4);
}

/* 响应式 */
@media (max-width: 900px) {
    .comm-container {
        grid-template-columns: 1fr;
    }
    .comm-sidebar {
        position: static;
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        gap: 16px;
    }
    .stats-grid { margin-top: 0; }
}

@media (max-width: 600px) {
    .header-container { padding: 0 16px; }
    .comm-main { padding: 16px; }
    .content-header h2 { font-size: 18px; }
    .sort-options { display: none; }
    .post-card { padding: 16px; }
    .post-title { font-size: 15px; }
}
/* 创建帖子按钮样式 - 区别于普通导航链接 */
button.dock-item {
    background: transparent;
    border: none;
    cursor: pointer;
}

.dock-action-btn {
    color: #10b981; /* 翡翠绿 - 代表创建/动作 */
    background: rgba(16, 185, 129, 0.08);
    border: 1px solid rgba(16, 185, 129, 0.2);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
}

.dock-action-btn:hover {
    background: rgba(16, 185, 129, 0.2);
    border-color: #10b981;
    color: #34d399;
    box-shadow: 0 0 12px rgba(16, 185, 129, 0.4);
    transform: scale(1.1);
}