/* ============================================================
   V2EX 风格主题样式
   ============================================================ */

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

html {
    font-size: 14px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue",
                 "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
                 Arial, sans-serif;
    font-size: 14px;
    line-height: 1.6;
    color: #333;
    background: #e2e2e2;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: #778087;
    text-decoration: none;
    transition: color 0.15s ease;
}

a:hover {
    color: #555;
}

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

/* ============================================================
   顶部导航栏
   ============================================================ */

#wrapper {
    min-height: 100vh;
}

#main {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

#top-bar {
    background: #f5f5f5;
    border-bottom: 1px solid #ddd;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
    position: sticky;
    top: 0;
    z-index: 100;
}

.top-bar-inner {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 32px;
    height: 52px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    font-size: 18px;
    font-weight: 600;
    color: #333;
    letter-spacing: 0.5px;
}

.logo:hover {
    color: #778087;
}

.menu {
    display: flex;
    gap: 24px;
}

.menu a {
    color: #778087;
    font-size: 14px;
    padding: 4px 0;
    border-bottom: 2px solid transparent;
}

.menu a:hover {
    color: #333;
    border-bottom-color: #778087;
}

/* ============================================================
   主体布局
   ============================================================ */

#main-box {
    max-width: 1400px;
    margin: 24px auto;
    padding: 0 32px;
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 24px;
    flex: 1;
}

.content-box {
    background: #fff;
    border: 1px solid #e2e2e2;
    border-radius: 4px;
    padding: 24px 28px;
}

.single-content {
    padding: 36px 40px;
}

/* ============================================================
   页面标题
   ============================================================ */

.page-title {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    padding-bottom: 12px;
    margin-bottom: 16px;
    border-bottom: 1px solid #f0f0f0;
}

.page-title h1 {
    font-size: 16px;
    font-weight: 600;
    color: #333;
}

.page-title .count {
    font-size: 12px;
    color: #999;
}

/* ============================================================
   文章列表项（V2EX 经典卡片样式）
   ============================================================ */

.post-list {
    display: flex;
    flex-direction: column;
}

.post-item {
    padding: 12px 0;
    border-bottom: 1px solid #f0f0f0;
}

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

.post-item:hover {
    background: #fafafa;
}

.post-main {
    display: flex;
    align-items: flex-start;
    gap: 10px;
}

.post-avatar {
    flex-shrink: 0;
    width: 32px;
    height: 32px;
    border-radius: 4px;
    overflow: hidden;
    background: #778087;
    display: flex;
    align-items: center;
    justify-content: center;
}

.post-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.avatar-placeholder {
    color: #fff;
    font-size: 14px;
    font-weight: 600;
    text-transform: uppercase;
}

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

.post-title-row {
    margin-bottom: 4px;
}

.post-title {
    font-size: 15px;
    color: #778087;
    font-weight: 500;
    line-height: 1.4;
    display: inline-block;
}

.post-title:hover {
    color: #555;
}

.post-meta {
    font-size: 12px;
    color: #999;
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 6px;
}

.post-author a {
    color: #999;
}

.post-author a:hover {
    color: #778087;
}

.post-tag {
    display: inline-block;
    padding: 1px 8px;
    background: #f5f5f5;
    color: #999;
    border-radius: 2px;
    font-size: 12px;
    line-height: 18px;
}

.post-date .sep,
.post-comments .sep {
    color: #ddd;
    margin: 0 2px;
}

.post-comments a {
    color: #999;
}

/* ============================================================
   分页
   ============================================================ */

.pagination {
    margin-top: 24px;
    padding-top: 16px;
    border-top: 1px solid #f0f0f0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
}

.page-btn {
    display: inline-block;
    padding: 6px 14px;
    background: #f5f5f5;
    color: #778087;
    border-radius: 3px;
    font-size: 13px;
    border: 1px solid #e2e2e2;
}

.page-btn:hover:not(.disabled) {
    background: #778087;
    color: #fff;
    border-color: #778087;
}

.page-btn.disabled {
    color: #ccc;
    cursor: not-allowed;
}

.page-info {
    font-size: 13px;
    color: #999;
}

/* ============================================================
   空状态
   ============================================================ */

.empty-state {
    padding: 60px 20px;
    text-align: center;
    color: #999;
}

.empty-state p {
    margin: 8px 0;
}

/* ============================================================
   文章详情页
   ============================================================ */

.post-single {
    margin-bottom: 30px;
}

.post-header {
    padding-bottom: 16px;
    margin-bottom: 24px;
    border-bottom: 1px solid #f0f0f0;
}

.post-single-title {
    font-size: 22px;
    font-weight: 600;
    color: #333;
    line-height: 1.4;
    margin-bottom: 10px;
}

.post-single-meta {
    font-size: 13px;
    color: #999;
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 6px;
}

.post-single-meta .author a {
    color: #778087;
    font-weight: 500;
}

.post-single-meta .sep {
    color: #ddd;
}

.post-single-meta .date {
    color: #999;
}

.post-single-meta .issue-link {
    color: #778087;
    margin-left: auto;
}

/* ============================================================
   文章正文
   ============================================================ */

.post-content {
    font-size: 15px;
    line-height: 1.8;
    color: #333;
    word-wrap: break-word;
}

.post-content h1,
.post-content h2,
.post-content h3,
.post-content h4,
.post-content h5,
.post-content h6 {
    margin: 1.5em 0 0.6em;
    font-weight: 600;
    color: #333;
    line-height: 1.3;
}

.post-content h1 { font-size: 1.6em; }
.post-content h2 { font-size: 1.4em; border-bottom: 1px solid #eee; padding-bottom: 0.3em; }
.post-content h3 { font-size: 1.2em; }
.post-content h4 { font-size: 1.05em; }

.post-content p {
    margin: 0.8em 0;
}

.post-content a {
    color: #778087;
    text-decoration: underline;
    text-decoration-color: #ddd;
    text-underline-offset: 2px;
}

.post-content a:hover {
    color: #555;
    text-decoration-color: #778087;
}

.post-content ul,
.post-content ol {
    margin: 0.8em 0;
    padding-left: 2em;
}

.post-content li {
    margin: 0.3em 0;
}

.post-content blockquote {
    margin: 1em 0;
    padding: 8px 16px;
    border-left: 3px solid #778087;
    background: #f9f9f9;
    color: #666;
}

.post-content blockquote p {
    margin: 0.3em 0;
}

.post-content code {
    font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
    font-size: 0.9em;
    padding: 2px 5px;
    background: #f5f5f5;
    border-radius: 3px;
    color: #c7254e;
}

.post-content pre {
    margin: 1em 0;
    padding: 14px 16px;
    background: #f8f8f8;
    border: 1px solid #e2e2e2;
    border-radius: 4px;
    overflow-x: auto;
    font-size: 13px;
    line-height: 1.5;
}

.post-content pre code {
    padding: 0;
    background: none;
    color: #333;
    font-size: 13px;
}

.post-content img {
    margin: 1em 0;
    border-radius: 4px;
    border: 1px solid #eee;
}

.post-content table {
    width: 100%;
    margin: 1em 0;
    border-collapse: collapse;
    font-size: 14px;
}

.post-content th,
.post-content td {
    padding: 8px 12px;
    border: 1px solid #e2e2e2;
    text-align: left;
}

.post-content th {
    background: #f5f5f5;
    font-weight: 600;
}

.post-content hr {
    margin: 2em 0;
    border: none;
    border-top: 1px solid #eee;
}

/* ============================================================
   文章底部
   ============================================================ */

.post-footer {
    margin-top: 30px;
    padding-top: 16px;
    border-top: 1px solid #f0f0f0;
}

.edit-hint {
    font-size: 13px;
    color: #999;
    background: #fafafa;
    padding: 12px 16px;
    border-radius: 4px;
    border-left: 3px solid #778087;
}

.edit-hint a {
    color: #778087;
    font-weight: 500;
}

/* ============================================================
   上一篇/下一篇导航
   ============================================================ */

.post-nav {
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid #f0f0f0;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.post-nav a,
.post-nav span {
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding: 10px 14px;
    background: #fafafa;
    border-radius: 4px;
    border: 1px solid #eee;
}

.post-nav .next {
    text-align: right;
}

.post-nav .nav-label {
    font-size: 12px;
    color: #999;
}

.post-nav .nav-title {
    font-size: 14px;
    color: #778087;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.post-nav a:hover {
    background: #f0f0f0;
}

.post-nav .disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* ============================================================
   侧边栏
   ============================================================ */

.sidebar {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.sidebar-box {
    background: #fff;
    border: 1px solid #e2e2e2;
    border-radius: 4px;
    padding: 16px;
}

.sidebar-box h3 {
    font-size: 13px;
    font-weight: 600;
    color: #999;
    margin-bottom: 12px;
    padding-bottom: 8px;
    border-bottom: 1px solid #f0f0f0;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.sidebar-box p {
    font-size: 13px;
    color: #666;
    line-height: 1.6;
}

/* 标签云 */

.tag-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.tag-link {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 3px 8px;
    background: #f5f5f5;
    color: #778087;
    border-radius: 3px;
    font-size: 12px;
    line-height: 18px;
}

.tag-link:hover {
    background: #778087;
    color: #fff;
}

.tag-count {
    font-size: 11px;
    color: #999;
    background: rgba(0, 0, 0, 0.05);
    padding: 0 4px;
    border-radius: 2px;
}

.tag-link:hover .tag-count {
    color: #fff;
    background: rgba(255, 255, 255, 0.2);
}

.big-tag-cloud .tag-link {
    padding: 5px 10px;
    font-size: 13px;
}

/* 归档列表 */

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

.archive-list li {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 6px 0;
    font-size: 13px;
    border-bottom: 1px dashed #f0f0f0;
}

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

.archive-list a {
    color: #778087;
}

.archive-count {
    color: #ccc;
    font-size: 12px;
}

/* 最近文章列表 */

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

.recent-list li {
    padding: 6px 0;
    border-bottom: 1px dashed #f0f0f0;
}

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

.recent-list a {
    font-size: 13px;
    color: #778087;
    display: block;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.recent-list a:hover {
    color: #555;
}

/* 目录 */

#TableOfContents ul {
    list-style: none;
    padding-left: 12px;
    margin: 0;
}

#TableOfContents > ul {
    padding-left: 0;
}

#TableOfContents li {
    margin: 4px 0;
}

#TableOfContents a {
    font-size: 13px;
    color: #999;
    display: block;
    padding: 2px 0;
}

#TableOfContents a:hover {
    color: #778087;
}

/* ============================================================
   底部
   ============================================================ */

#bottom-bar {
    background: #f5f5f5;
    border-top: 1px solid #ddd;
    margin-top: 40px;
    padding: 20px 0;
}

.bottom-bar-inner {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 32px;
    text-align: center;
    font-size: 12px;
    color: #999;
}

.bottom-bar-inner p {
    margin: 4px 0;
}

.bottom-bar-inner a {
    color: #778087;
}

.bottom-bar-inner .powered-by {
    font-size: 11px;
    color: #bbb;
}

.bottom-bar-inner .beian {
    font-size: 11px;
    color: #ccc;
}

/* ============================================================
   响应式
   ============================================================ */

/* 大屏（>1600px）：稍微再放宽一点，但不超过 1500px，避免单行过长难读 */
@media (min-width: 1600px) {
    .top-bar-inner,
    #main-box,
    .bottom-bar-inner {
        max-width: 1500px;
    }
}

/* 中等屏幕（1024px - 1200px）：保持双栏但收窄侧边栏 */
@media (max-width: 1200px) {
    #main-box {
        grid-template-columns: 1fr 260px;
        gap: 20px;
        padding: 0 24px;
    }
    .top-bar-inner,
    .bottom-bar-inner {
        padding: 0 24px;
    }
}

/* 平板（<=900px）：单栏，侧边栏移到下方 */
@media (max-width: 900px) {
    #main-box {
        grid-template-columns: 1fr;
    }

    .sidebar {
        order: 2;
    }
}

/* 手机（<=600px） */
@media (max-width: 600px) {
    .top-bar-inner {
        padding: 0 14px;
        height: 46px;
    }

    .logo {
        font-size: 16px;
    }

    .menu {
        gap: 14px;
    }

    .menu a {
        font-size: 13px;
    }

    #main-box {
        padding: 0 12px;
        margin: 12px auto;
        gap: 12px;
    }

    .content-box {
        padding: 16px;
    }

    .single-content {
        padding: 20px;
    }

    .post-single-title {
        font-size: 18px;
    }

    .post-content {
        font-size: 14px;
    }

    .post-nav {
        grid-template-columns: 1fr;
    }

    .post-nav .next {
        text-align: left;
    }

    .post-single-meta .issue-link {
        margin-left: 0;
    }

    .bottom-bar-inner {
        padding: 0 14px;
    }
}