/* ============================================
   个人博客系统 - 样式表
   简洁风格，响应式适配
   ============================================ */

/* ---------- 基础重置 ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; -webkit-text-size-adjust: 100%; }
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
                 "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    line-height: 1.7;
    color: #333;
    background: #fafafa;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}
a { color: #2563eb; text-decoration: none; transition: color .2s; }
a:hover { color: #1d4ed8; }
img { max-width: 100%; height: auto; }
ul, ol { padding-left: 1.5em; }

/* ---------- 布局容器 ---------- */
.container {
    width: 100%;
    max-width: 960px;
    margin: 0 auto;
    padding: 0 20px;
}
.main-content {
    flex: 1;
    padding-top: 30px;
    padding-bottom: 50px;
}

/* ---------- 头部 ---------- */
.site-header {
    background: #fff;
    border-bottom: 1px solid #e5e7eb;
    position: sticky;
    top: 0;
    z-index: 100;
}
.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 60px;
}
.site-logo {
    font-size: 1.25rem;
    font-weight: 700;
    color: #111;
}
.site-logo:hover { color: #2563eb; }
.site-nav {
    display: flex;
    gap: 24px;
    align-items: center;
}
.site-nav a {
    color: #555;
    font-size: 0.95rem;
}
.site-nav a:hover, .site-nav a.active { color: #2563eb; }
.site-nav .nav-admin {
    background: #2563eb;
    color: #fff !important;
    padding: 5px 14px;
    border-radius: 4px;
    font-size: 0.85rem;
}
.site-nav .nav-admin:hover { background: #1d4ed8; }
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 6px;
}
.nav-toggle span {
    width: 22px;
    height: 2px;
    background: #333;
    border-radius: 2px;
}

/* ---------- 文章列表 ---------- */
.post-list { list-style: none; padding: 0; }
.post-item {
    background: #fff;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    padding: 24px;
    margin-bottom: 20px;
    transition: box-shadow .2s, transform .2s;
}
.post-item:hover {
    box-shadow: 0 4px 16px rgba(0,0,0,.08);
    transform: translateY(-2px);
}
.post-title {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 8px;
}
.post-title a { color: #111; }
.post-title a:hover { color: #2563eb; }
.post-meta {
    font-size: 0.85rem;
    color: #888;
    margin-bottom: 12px;
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}
.post-meta .cat-tag {
    background: #eff6ff;
    color: #2563eb;
    padding: 2px 10px;
    border-radius: 12px;
    font-size: 0.8rem;
}
.post-summary { color: #555; font-size: 0.95rem; }
.post-tags { margin-top: 10px; display: flex; flex-wrap: wrap; gap: 6px; }
.post-tags .tag {
    font-size: 0.78rem;
    color: #888;
    background: #f3f4f6;
    padding: 2px 8px;
    border-radius: 4px;
}

/* 封面图 */
.post-cover {
    display: block;
    margin: -24px -24px 16px -24px;
    overflow: hidden;
    border-radius: 8px 8px 0 0;
}
.post-cover img {
    width: 100%;
    height: 220px;
    object-fit: cover;
    display: block;
    transition: transform .3s;
}
.post-cover:hover img { transform: scale(1.03); }
.article-cover {
    margin-bottom: 24px;
    border-radius: 8px;
    overflow: hidden;
}
.article-cover img {
    width: 100%;
    max-height: 420px;
    object-fit: cover;
    display: block;
    border-radius: 8px;
}
/* 文章图片画廊（多张） */
.article-gallery {
    margin: 24px 0;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 12px;
}
.article-gallery .gallery-item {
    display: block;
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid #e5e7eb;
    background: #fff;
}
.article-gallery .gallery-item img {
    width: 100%;
    height: 220px;
    object-fit: cover;
    display: block;
    transition: transform .3s, opacity .2s;
}
.article-gallery .gallery-item:hover img {
    transform: scale(1.05);
    opacity: 0.9;
}
/* 单张图时占满整行 */
.article-gallery .gallery-item:only-child {
    grid-column: 1 / -1;
}
.article-gallery .gallery-item:only-child img {
    height: auto;
    max-height: 500px;
    object-fit: contain;
}

/* ---------- 文章详情 ---------- */
.article-header { margin-bottom: 30px; }
.article-header h1 {
    font-size: 1.8rem;
    font-weight: 700;
    color: #111;
    margin-bottom: 12px;
    line-height: 1.4;
}
.article-content {
    background: #fff;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    padding: 30px;
    font-size: 1rem;
    line-height: 1.85;
}
.article-content h2 { font-size: 1.4rem; margin: 1.5em 0 .6em; color: #111; }
.article-content h3 { font-size: 1.15rem; margin: 1.3em 0 .5em; color: #222; }
.article-content p { margin-bottom: 1em; }
.article-content ul, .article-content ol { margin-bottom: 1em; }
.article-content li { margin-bottom: .3em; }
.article-content code {
    background: #f3f4f6;
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.9em;
    font-family: "SF Mono", Consolas, monospace;
}
.article-content pre {
    background: #1e293b;
    color: #e2e8f0;
    padding: 16px;
    border-radius: 6px;
    overflow-x: auto;
    margin-bottom: 1em;
}
.article-content pre code { background: none; padding: 0; color: inherit; }
.article-content blockquote {
    border-left: 4px solid #2563eb;
    padding: 8px 16px;
    margin: 1em 0;
    background: #f8fafc;
    color: #555;
}
.article-nav {
    display: flex;
    justify-content: space-between;
    margin-top: 30px;
    gap: 16px;
}
.article-nav a {
    flex: 1;
    background: #fff;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    padding: 16px;
    font-size: 0.9rem;
    text-align: center;
}
.article-nav a:hover { border-color: #2563eb; }
.article-nav .nav-label { font-size: 0.78rem; color: #999; display: block; margin-bottom: 4px; }

/* ---------- 评论区 ---------- */
.comments-section {
    margin-top: 40px;
}
.comments-title {
    font-size: 1.2rem;
    margin-bottom: 20px;
    color: #111;
    padding-bottom: 10px;
    border-bottom: 2px solid #2563eb;
    display: inline-block;
}
.comment-form {
    background: #fff;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 30px;
}
.comment-form .form-group { margin-bottom: 14px; }
.comment-form .form-group label {
    display: block;
    margin-bottom: 5px;
    font-size: 0.88rem;
    color: #555;
    font-weight: 500;
}
.comment-form input[type="text"],
.comment-form input[type="file"],
.comment-form textarea {
    width: 100%;
    padding: 9px 12px;
    border: 1px solid #d1d5db;
    border-radius: 5px;
    font-size: 0.92rem;
    outline: none;
    font-family: inherit;
}
.comment-form input:focus, .comment-form textarea:focus {
    border-color: #2563eb;
    box-shadow: 0 0 0 3px rgba(37,99,235,.1);
}
.comment-form textarea { resize: vertical; min-height: 80px; }
.comment-form .form-row {
    display: flex;
    gap: 16px;
}
.comment-form .form-row .form-group { flex: 1; }
.comments-empty {
    text-align: center;
    padding: 30px;
    color: #999;
    background: #fff;
    border: 1px dashed #e5e7eb;
    border-radius: 8px;
}
.comment-list {
    list-style: none;
    padding: 0;
}
.comment-item {
    display: flex;
    gap: 14px;
    padding: 18px 0;
    border-bottom: 1px solid #f0f0f0;
}
.comment-item:last-child { border-bottom: none; }
.comment-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    font-weight: 600;
    flex-shrink: 0;
}
.comment-body { flex: 1; min-width: 0; }
.comment-meta {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 6px;
}
.comment-author {
    font-weight: 600;
    color: #111;
    font-size: 0.92rem;
}
.comment-time {
    font-size: 0.8rem;
    color: #999;
}
.comment-text {
    color: #444;
    font-size: 0.93rem;
    line-height: 1.7;
    word-break: break-word;
}
.comment-image {
    margin-top: 10px;
}
.comment-image img {
    max-width: 300px;
    max-height: 300px;
    border-radius: 6px;
    cursor: pointer;
    border: 1px solid #e5e7eb;
    transition: opacity .2s;
}
.comment-image img:hover { opacity: 0.85; }

/* ---------- 侧边栏 / 搜索 ---------- */
.sidebar { margin-top: 10px; }
.search-box {
    display: flex;
    margin-bottom: 24px;
}
.search-box input {
    flex: 1;
    padding: 10px 14px;
    border: 1px solid #d1d5db;
    border-radius: 6px 0 0 6px;
    font-size: 0.95rem;
    outline: none;
}
.search-box input:focus { border-color: #2563eb; }
.search-box button {
    padding: 10px 18px;
    background: #2563eb;
    color: #fff;
    border: none;
    border-radius: 0 6px 6px 0;
    cursor: pointer;
    font-size: 0.9rem;
}
.search-box button:hover { background: #1d4ed8; }
.widget {
    background: #fff;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 20px;
}
.widget h3 {
    font-size: 1rem;
    margin-bottom: 14px;
    color: #111;
    padding-bottom: 8px;
    border-bottom: 1px solid #f0f0f0;
}
.widget ul { list-style: none; padding: 0; }
.widget ul li {
    padding: 6px 0;
    border-bottom: 1px dashed #f0f0f0;
    font-size: 0.9rem;
    display: flex;
    justify-content: space-between;
}
.widget ul li:last-child { border-bottom: none; }
.widget .count { color: #aaa; font-size: 0.8rem; }
.tag-cloud { display: flex; flex-wrap: wrap; gap: 8px; }
.tag-cloud a {
    background: #f3f4f6;
    color: #555;
    padding: 4px 10px;
    border-radius: 4px;
    font-size: 0.82rem;
}
.tag-cloud a:hover { background: #2563eb; color: #fff; }

/* ---------- 分页 ---------- */
.pagination {
    display: flex;
    justify-content: center;
    gap: 6px;
    margin-top: 30px;
}
.pagination a, .pagination span {
    padding: 8px 14px;
    border: 1px solid #e5e7eb;
    border-radius: 6px;
    font-size: 0.9rem;
    color: #555;
    background: #fff;
}
.pagination a:hover { border-color: #2563eb; color: #2563eb; }
.pagination .current { background: #2563eb; color: #fff; border-color: #2563eb; }
.pagination .disabled { color: #ccc; cursor: not-allowed; }

/* ---------- 底部 ---------- */
.site-footer {
    background: #fff;
    border-top: 1px solid #e5e7eb;
    padding: 24px 0;
    text-align: center;
    color: #888;
    font-size: 0.85rem;
}

/* ---------- 布局：首页两栏 ---------- */
.home-layout {
    display: grid;
    grid-template-columns: 1fr 280px;
    gap: 30px;
}

/* ============================================
   管理后台样式
   ============================================ */
.admin-body { background: #f0f2f5; }
.admin-header {
    background: #1e293b;
    color: #fff;
    padding: 0 24px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.admin-header .logo { font-weight: 700; font-size: 1.1rem; }
.admin-header .user-info { font-size: 0.9rem; display: flex; align-items: center; gap: 16px; }
.admin-header .user-info a { color: #94a3b8; }
.admin-header .user-info a:hover { color: #fff; }
.admin-layout { display: flex; min-height: calc(100vh - 56px); }
.admin-sidebar {
    width: 200px;
    background: #fff;
    border-right: 1px solid #e5e7eb;
    padding: 16px 0;
}
.admin-sidebar a {
    display: block;
    padding: 10px 24px;
    color: #475569;
    font-size: 0.92rem;
    border-left: 3px solid transparent;
}
.admin-sidebar a:hover, .admin-sidebar a.active {
    background: #eff6ff;
    color: #2563eb;
    border-left-color: #2563eb;
}
.admin-main {
    flex: 1;
    padding: 24px;
    overflow-x: auto;
}
.admin-card {
    background: #fff;
    border-radius: 8px;
    padding: 24px;
    margin-bottom: 20px;
    box-shadow: 0 1px 3px rgba(0,0,0,.05);
}
.admin-card h2 {
    font-size: 1.15rem;
    margin-bottom: 18px;
    color: #1e293b;
}
.admin-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}
.admin-table th, .admin-table td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid #f0f0f0;
}
.admin-table th {
    background: #f8fafc;
    font-weight: 600;
    color: #475569;
    font-size: 0.85rem;
}
.admin-table tr:hover { background: #f8fafc; }
.admin-table .actions { display: flex; gap: 8px; }
.btn {
    display: inline-block;
    padding: 7px 16px;
    border-radius: 5px;
    font-size: 0.88rem;
    cursor: pointer;
    border: none;
    transition: all .2s;
}
.btn-primary { background: #2563eb; color: #fff; }
.btn-primary:hover { background: #1d4ed8; }
.btn-danger { background: #ef4444; color: #fff; }
.btn-danger:hover { background: #dc2626; }
.btn-secondary { background: #f3f4f6; color: #475569; }
.btn-secondary:hover { background: #e5e7eb; }
.btn-sm { padding: 4px 10px; font-size: 0.8rem; }
.form-group { margin-bottom: 18px; }
.form-group label {
    display: block;
    margin-bottom: 6px;
    font-weight: 500;
    color: #374151;
    font-size: 0.9rem;
}
.form-group input[type="text"],
.form-group input[type="password"],
.form-group input[type="number"],
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 9px 12px;
    border: 1px solid #d1d5db;
    border-radius: 5px;
    font-size: 0.92rem;
    outline: none;
    font-family: inherit;
}
.form-group input:focus, .form-group textarea:focus, .form-group select:focus {
    border-color: #2563eb;
    box-shadow: 0 0 0 3px rgba(37,99,235,.1);
}
.form-group textarea { resize: vertical; min-height: 120px; }
.form-row { display: flex; gap: 16px; }
.form-row .form-group { flex: 1; }
.alert {
    padding: 12px 16px;
    border-radius: 6px;
    margin-bottom: 16px;
    font-size: 0.9rem;
}
.alert-success { background: #dcfce7; color: #166534; }
.alert-error { background: #fee2e2; color: #991b1b; }
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}
.stat-card {
    background: #fff;
    border-radius: 8px;
    padding: 20px;
    text-align: center;
    box-shadow: 0 1px 3px rgba(0,0,0,.05);
}
.stat-card .num { font-size: 2rem; font-weight: 700; color: #2563eb; }
.stat-card .label { font-size: 0.85rem; color: #888; margin-top: 4px; }

/* ---------- 登录页 ---------- */
.login-wrap {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 20px;
}
.login-box {
    background: #fff;
    border-radius: 12px;
    padding: 36px;
    width: 100%;
    max-width: 380px;
    box-shadow: 0 10px 40px rgba(0,0,0,.15);
}
.login-box h1 {
    text-align: center;
    font-size: 1.4rem;
    margin-bottom: 24px;
    color: #1e293b;
}
.login-box .btn { width: 100%; padding: 11px; font-size: 1rem; }
.login-box .back-link { text-align: center; margin-top: 16px; font-size: 0.85rem; }

/* ---------- 空状态 ---------- */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: #999;
}
.empty-state .icon { font-size: 3rem; margin-bottom: 12px; }

/* ============================================
   响应式适配
   ============================================ */
@media (max-width: 768px) {
    .home-layout { grid-template-columns: 1fr; }
    .site-nav {
        display: none;
        position: absolute;
        top: 60px;
        left: 0;
        right: 0;
        background: #fff;
        flex-direction: column;
        padding: 16px 20px;
        border-bottom: 1px solid #e5e7eb;
        gap: 14px;
    }
    .site-nav.open { display: flex; }
    .nav-toggle { display: flex; }
    .post-cover img { height: 180px; }
    .article-cover img { max-height: 260px; }
    .article-gallery { grid-template-columns: 1fr; gap: 10px; }
    .article-gallery .gallery-item img { height: 200px; }
    .comment-form .form-row { flex-direction: column; gap: 0; }
    .comment-image img { max-width: 100%; max-height: 200px; }
    .article-content { padding: 20px; }
    .article-header h1 { font-size: 1.4rem; }
    .admin-layout { flex-direction: column; }
    .admin-sidebar {
        width: 100%;
        display: flex;
        overflow-x: auto;
        padding: 8px;
        border-right: none;
        border-bottom: 1px solid #e5e7eb;
    }
    .admin-sidebar a {
        white-space: nowrap;
        border-left: none;
        border-bottom: 3px solid transparent;
        padding: 8px 14px;
    }
    .admin-sidebar a:hover, .admin-sidebar a.active {
        border-left: none;
        border-bottom-color: #2563eb;
    }
    .admin-main { padding: 16px; }
    .form-row { flex-direction: column; gap: 0; }
    .admin-table { font-size: 0.82rem; }
    .admin-table th, .admin-table td { padding: 8px 6px; }
}
@media (max-width: 480px) {
    .container { padding: 0 14px; }
    .post-item { padding: 18px; }
    .post-cover { margin: -18px -18px 14px -18px; }
    .post-cover img { height: 160px; }
    .post-title { font-size: 1.1rem; }
    .article-content { padding: 16px; font-size: 0.95rem; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
}