/* ============================================================
   ZiBlog Style - 子比主题风格
   简约优雅 · 卡片式布局 · 注重阅读体验
   ============================================================ */

/* ============================================================
   1. CSS 变量系统 (主题色自定义)
   ============================================================ */
:root {
    /* 主色调（由 PHP 主题设置覆盖） */
    --primary: #3498db;
    --primary-dark: #2980b9;
    --primary-light: #5dade2;
    --primary-bg: rgba(52, 152, 219, 0.08);

    /* 功能色 */
    --success: #52c41a;
    --success-bg: rgba(82, 196, 26, 0.1);
    --warning: #faad14;
    --warning-bg: rgba(250, 173, 20, 0.1);
    --danger: #ff4d4f;
    --danger-bg: rgba(255, 77, 79, 0.1);
    --info: #1890ff;

    /* 文字色 */
    --text-primary: #2c3e50;
    --text-secondary: #5a6a7a;
    --text-tertiary: #95a5a6;
    --text-link: var(--primary);
    --text-link-hover: var(--primary-dark);

    /* 背景色 */
    --bg-body: #f0f2f5;
    --bg-card: #ffffff;
    --bg-hover: #f7f8fa;
    --bg-active: #eef1f5;
    --bg-overlay: rgba(0, 0, 0, 0.5);
    --bg-navbar: rgba(255, 255, 255, 0.85);

    /* 边框 */
    --border-color: #e8ecef;
    --border-color-light: #f0f2f5;
    --border-radius-sm: 6px;
    --border-radius: 10px;
    --border-radius-lg: 16px;
    --border-radius-full: 999px;

    /* 阴影 */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04);
    --shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.12);
    --shadow-primary: 0 4px 16px rgba(52, 152, 219, 0.3);

    /* 间距 */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;

    /* 字体 */
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
        "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
    --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, Courier, monospace;

    /* 过渡 */
    --transition-fast: 0.15s ease;
    --transition: 0.25s ease;
    --transition-slow: 0.4s ease;

    /* 尺寸 */
    --navbar-height: 64px;
    --container-width: 1200px;
    --sidebar-width: 300px;
}

/* ============================================================
   2. 暗黑模式
   ============================================================ */
[data-theme="dark"] {
    --primary-bg: rgba(52, 152, 219, 0.15);

    --text-primary: #e6e6e6;
    --text-secondary: #a0a0a0;
    --text-tertiary: #707070;

    --bg-body: #1a1a2e;
    --bg-card: #232338;
    --bg-hover: #2a2a42;
    --bg-active: #313150;
    --bg-overlay: rgba(0, 0, 0, 0.7);
    --bg-navbar: rgba(35, 35, 56, 0.85);

    --border-color: #33334a;
    --border-color-light: #2a2a42;

    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.2);
    --shadow: 0 2px 12px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.5);
}

/* ============================================================
   3. 基础重置
   ============================================================ */
*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: calc(var(--navbar-height) + 20px);
}

body {
    margin: 0;
    font-family: var(--font-sans);
    font-size: 14px;
    line-height: 1.7;
    color: var(--text-primary);
    background-color: var(--bg-body);
    transition: background-color var(--transition), color var(--transition);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

a {
    color: var(--text-link);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--text-link-hover);
}

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

ul,
ol {
    margin: 0;
    padding: 0;
    list-style: none;
}

h1, h2, h3, h4, h5, h6 {
    margin: 0;
    font-weight: 600;
    line-height: 1.4;
    color: var(--text-primary);
}

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

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

::selection {
    background: var(--primary);
    color: #fff;
}

::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-body);
}

::-webkit-scrollbar-thumb {
    background: var(--text-tertiary);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

/* ============================================================
   4. 布局
   ============================================================ */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.main-layout {
    display: flex;
    gap: var(--spacing-lg);
    padding: var(--spacing-lg) 0;
    align-items: flex-start;
}

.content-area {
    flex: 1;
    min-width: 0;
}

.sidebar {
    flex-shrink: 0;
    width: var(--sidebar-width);
    position: sticky;
    top: calc(var(--navbar-height) + 20px);
}

.main-layout.no-sidebar .content-area {
    max-width: 100%;
}

/* ============================================================
   5. 导航栏 (毛玻璃 · 吸顶 · 响应式)
   ============================================================ */
.navbar {
    position: sticky;
    top: 0;
    z-index: 1000;
    height: var(--navbar-height);
    background: var(--bg-navbar);
    backdrop-filter: saturate(180%) blur(16px);
    -webkit-backdrop-filter: saturate(180%) blur(16px);
    border-bottom: 1px solid var(--border-color);
    transition: all var(--transition);
}

.navbar-inner {
    max-width: var(--container-width);
    height: 100%;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.navbar-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
    white-space: nowrap;
    flex-shrink: 0;
}

.navbar-logo img {
    height: 36px;
    width: auto;
}

.navbar-logo i {
    color: var(--primary);
    font-size: 22px;
}

.navbar-logo:hover {
    color: var(--primary);
}

.navbar-menu {
    display: flex;
    align-items: center;
    flex-wrap: nowrap;
    gap: 4px;
    flex: 1;
    margin: 0;
    padding: 0;
    list-style: none;
    overflow: visible;
}

.navbar-menu > li {
    flex-shrink: 0;
    white-space: nowrap;
}

.navbar-menu > li > a {
    display: flex;
    align-items: center;
    gap: 5px;
    padding: 8px 14px;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    border-radius: var(--border-radius-sm);
    transition: all var(--transition-fast);
    position: relative;
}

.navbar-menu > li > a i {
    font-size: 14px;
}

.navbar-menu > li > a::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--primary);
    border-radius: 1px;
    transition: width var(--transition);
}

.navbar-menu > li > a:hover {
    color: var(--primary);
    background: var(--primary-bg);
}

.navbar-menu > li > a:hover::after {
    width: 20px;
}

.navbar-right {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-left: auto;
    flex-shrink: 0;
}

.navbar-search {
    display: flex;
    align-items: center;
    background: var(--bg-hover);
    border-radius: var(--border-radius-full);
    padding: 4px 4px 4px 16px;
    transition: all var(--transition);
    border: 1px solid transparent;
}

.navbar-search:focus-within {
    background: var(--bg-card);
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-bg);
}

.navbar-search input {
    border: none;
    background: none;
    outline: none;
    width: 160px;
    color: var(--text-primary);
    font-size: 13px;
}

.navbar-search input::placeholder {
    color: var(--text-tertiary);
}

.navbar-search button {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    transition: all var(--transition-fast);
}

.navbar-search button:hover {
    background: var(--primary-dark);
    transform: scale(1.05);
}

.theme-toggle {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    color: var(--text-secondary);
    font-size: 16px;
    transition: all var(--transition-fast);
}

.theme-toggle:hover {
    background: var(--bg-hover);
    color: var(--primary);
    transform: rotate(20deg);
}

.navbar-user .avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    object-fit: cover;
    cursor: pointer;
    border: 2px solid var(--border-color);
    transition: all var(--transition-fast);
}

.navbar-user .avatar:hover {
    border-color: var(--primary);
}

.btn-login {
    display: inline-flex;
    align-items: center;
    padding: 7px 20px;
    background: var(--primary);
    color: #fff;
    border-radius: var(--border-radius-full);
    font-size: 13px;
    font-weight: 500;
    transition: all var(--transition);
}

.btn-login:hover {
    background: var(--primary-dark);
    color: #fff;
    transform: translateY(-1px);
    box-shadow: var(--shadow-primary);
}

.navbar-user .dropdown {
    position: relative;
}

.navbar-user .dropdown-menu {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    min-width: 160px;
    background: var(--bg-card);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    padding: 6px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: all var(--transition);
    z-index: 100;
}

.navbar-user .dropdown:hover .dropdown-menu,
.navbar-user .dropdown.active .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.navbar-user .dropdown-menu a {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 9px 12px;
    color: var(--text-secondary);
    border-radius: var(--border-radius-sm);
    font-size: 13px;
    transition: all var(--transition-fast);
}

.navbar-user .dropdown-menu a:hover {
    background: var(--primary-bg);
    color: var(--primary);
}

.navbar-toggle {
    display: none;
    width: 36px;
    height: 36px;
    align-items: center;
    justify-content: center;
    border-radius: var(--border-radius-sm);
    color: var(--text-primary);
    font-size: 20px;
}

/* 公告栏 */
.announcement-bar {
    background: linear-gradient(90deg, var(--primary-bg), transparent);
    border-bottom: 1px solid var(--border-color);
    padding: 8px 0;
    font-size: 13px;
    color: var(--text-secondary);
}

.announcement-bar .container {
    display: flex;
    align-items: center;
    gap: 8px;
}

.announcement-bar i {
    color: var(--primary);
    font-size: 14px;
}

.announcement-bar a {
    color: var(--text-secondary);
}

.announcement-bar a:hover {
    color: var(--primary);
}

/* ============================================================
   6. 文章卡片 (封面hover缩放 · hover上浮 · 入场动画)
   ============================================================ */
.post-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

/* 无侧边栏时，PC端使用3列 */
@media (min-width: 1200px) {
    .main-layout.no-sidebar .post-list {
        grid-template-columns: repeat(3, 1fr);
    }
}

.post-card {
    position: relative;
    background: var(--bg-card);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow);
    overflow: hidden;
    transition: all var(--transition);
    display: flex;
    flex-direction: column;
}

.post-card.has-cover {
    flex-direction: column;
}

.post-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.post-cover {
    width: 100%;
    height: 200px;
    overflow: hidden;
    position: relative;
    flex-shrink: 0;
}

.post-cover a {
    display: block;
    width: 100%;
    height: 100%;
}

.post-cover::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 50%, rgba(0, 0, 0, 0.12));
    pointer-events: none;
    opacity: 0;
    transition: opacity var(--transition);
}

.post-card:hover .post-cover::after {
    opacity: 1;
}

.post-card.has-cover .post-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.post-card:hover .post-cover img {
    transform: scale(1.08);
}

.post-content {
    flex: 1;
    padding: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.post-title {
    font-size: 18px;
    line-height: 1.5;
    margin-bottom: 10px;
}

.post-title a {
    color: var(--text-primary);
    transition: color var(--transition-fast);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

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

.post-excerpt {
    color: var(--text-secondary);
    font-size: 13px;
    line-height: 1.7;
    margin-bottom: 14px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    flex: 1;
}

.post-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 14px;
    font-size: 12px;
    color: var(--text-tertiary);
}

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

.post-meta i {
    font-size: 12px;
}

.category-badge {
    display: inline-flex;
    align-items: center;
    padding: 2px 10px;
    background: var(--primary-bg);
    color: var(--primary) !important;
    border-radius: var(--border-radius-full);
    font-size: 12px;
    font-weight: 500;
}

.category-badge:hover {
    background: var(--primary);
    color: #fff !important;
}

.sticky-badge {
    position: absolute;
    top: 12px;
    left: 12px;
    z-index: 2;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 3px 10px;
    background: var(--danger);
    color: #fff;
    border-radius: var(--border-radius-full);
    font-size: 11px;
    font-weight: 500;
    box-shadow: 0 2px 8px rgba(255, 77, 79, 0.3);
}

/* 无封面卡片样式 */
.post-card.no-cover .post-cover {
    display: none;
}

/* 文章卡片入场动画 */
.post-card.animate-in {
    animation: cardFadeInUp 0.5s ease forwards;
    opacity: 0;
}

@keyframes cardFadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ============================================================
   7. 文章详情页
   ============================================================ */
.breadcrumb {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 6px;
    padding: 12px 16px;
    background: var(--bg-card);
    border-radius: var(--border-radius);
    font-size: 13px;
    color: var(--text-tertiary);
    margin-bottom: var(--spacing-md);
    box-shadow: var(--shadow-sm);
}

.breadcrumb a {
    color: var(--text-secondary);
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

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

.breadcrumb .separator {
    color: var(--text-tertiary);
}

.breadcrumb > span:last-child {
    color: var(--text-primary);
    font-weight: 500;
}

.article-detail {
    background: var(--bg-card);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow);
    overflow: hidden;
}

.article-header {
    padding: var(--spacing-lg);
}

.article-cover {
    width: 100%;
    max-height: 420px;
    object-fit: cover;
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-lg);
}

.article-title {
    font-size: 26px;
    line-height: 1.4;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.article-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border-color-light);
    font-size: 13px;
    color: var(--text-tertiary);
}

.article-meta > span {
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.article-meta .author-info {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 500;
    color: var(--text-secondary);
}

.article-meta .author-info img {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    object-fit: cover;
}

/* 文章正文排版 */
.article-body {
    padding: 0 var(--spacing-lg) var(--spacing-lg);
    font-size: 15px;
    line-height: 1.85;
    color: var(--text-primary);
}

.article-body p {
    margin: 0 0 1.2em;
}

.article-body h2 {
    font-size: 22px;
    margin: 1.8em 0 0.8em;
    padding-left: 12px;
    border-left: 4px solid var(--primary);
    scroll-margin-top: 80px;
}

.article-body h3 {
    font-size: 18px;
    margin: 1.5em 0 0.6em;
    scroll-margin-top: 80px;
}

.article-body h4 {
    font-size: 16px;
    margin: 1.3em 0 0.5em;
}

.article-body ul,
.article-body ol {
    margin: 0 0 1.2em;
    padding-left: 1.5em;
}

.article-body ul li {
    list-style: disc;
    margin: 0.3em 0;
}

.article-body ol li {
    list-style: decimal;
    margin: 0.3em 0;
}

.article-body a {
    color: var(--primary);
    border-bottom: 1px solid var(--primary-bg);
    transition: all var(--transition-fast);
}

.article-body a:hover {
    border-bottom-color: var(--primary);
}

.article-body img {
    border-radius: var(--border-radius);
    margin: 1em auto;
    box-shadow: var(--shadow);
    cursor: zoom-in;
    transition: transform var(--transition);
}

.article-body img:hover {
    transform: scale(1.01);
}

.article-body hr {
    border: none;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--border-color), transparent);
    margin: 2em 0;
}

.article-body strong {
    color: var(--text-primary);
    font-weight: 600;
}

.article-body table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.2em 0;
    font-size: 14px;
}

.article-body table th,
.article-body table td {
    padding: 10px 14px;
    border: 1px solid var(--border-color);
    text-align: left;
}

.article-body table th {
    background: var(--bg-hover);
    font-weight: 600;
}

.article-body table tr:hover {
    background: var(--bg-hover);
}

/* 行内代码 */
.article-body code:not([class*="language-"]) {
    padding: 2px 6px;
    background: var(--bg-active);
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: 0.88em;
    color: var(--danger);
}

/* 代码块 */
.article-body pre {
    position: relative;
    margin: 1.2em 0;
    padding: 16px 18px;
    background: #2d2d2d !important;
    border-radius: var(--border-radius);
    overflow-x: auto;
    font-size: 13px;
    line-height: 1.6;
}

.article-body pre code {
    font-family: var(--font-mono);
    color: #ccc;
    background: none;
    padding: 0;
}

.article-body pre code[class*="language-"] {
    color: inherit;
}

/* 代码块复制按钮 */
.code-copy-btn {
    position: absolute;
    top: 8px;
    right: 8px;
    padding: 4px 10px;
    background: rgba(255, 255, 255, 0.1);
    color: #aaa;
    border-radius: var(--border-radius-sm);
    font-size: 12px;
    opacity: 0;
    transition: all var(--transition-fast);
    z-index: 2;
}

.article-body pre:hover .code-copy-btn {
    opacity: 1;
}

.code-copy-btn:hover {
    background: var(--primary);
    color: #fff;
}

.code-copy-btn.copied {
    background: var(--success);
    color: #fff;
}

/* 引用块 */
.article-body blockquote {
    margin: 1.2em 0;
    padding: 12px 18px;
    background: var(--primary-bg);
    border-left: 4px solid var(--primary);
    border-radius: 0 var(--border-radius) var(--border-radius) 0;
    color: var(--text-secondary);
}

.article-body blockquote p {
    margin: 0;
}

.article-body blockquote p + p {
    margin-top: 0.6em;
}

/* 目录树 */
.article-toc {
    margin: 0 0 1.5em;
    padding: 14px 18px;
    background: var(--bg-hover);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color-light);
}

.toc-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 6px;
}

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

.toc-list {
    margin: 0;
    padding-left: 0;
    list-style: none;
    font-size: 13px;
}

.toc-list ul {
    padding-left: 18px;
    list-style: none;
}

.toc-list li {
    margin: 4px 0;
    line-height: 1.6;
}

.toc-list a {
    color: var(--text-secondary);
    border: none;
    display: block;
    padding: 2px 8px;
    border-radius: 4px;
    transition: all var(--transition-fast);
}

.toc-list a:hover {
    color: var(--primary);
    background: var(--primary-bg);
}

.toc-list a.active {
    color: var(--primary);
    background: var(--primary-bg);
    font-weight: 500;
}

/* 文章底部 */
.article-footer {
    padding: 0 var(--spacing-lg) var(--spacing-lg);
}

.article-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: var(--spacing-lg);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border-color-light);
}

.article-tags a {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 12px;
    background: var(--bg-hover);
    color: var(--text-secondary);
    border-radius: var(--border-radius-full);
    font-size: 12px;
    transition: all var(--transition-fast);
}

.article-tags a:hover {
    background: var(--primary);
    color: #fff;
}

.article-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: var(--spacing-lg);
}

.action-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 9px 20px;
    background: var(--bg-hover);
    color: var(--text-secondary);
    border-radius: var(--border-radius-full);
    font-size: 13px;
    font-weight: 500;
    transition: all var(--transition);
}

.action-btn:hover {
    background: var(--bg-active);
    color: var(--text-primary);
    transform: translateY(-2px);
}

.action-btn.like-btn.liked,
.action-btn.like-btn:hover {
    background: var(--danger-bg);
    color: var(--danger);
}

.action-btn.like-btn.liked i,
.action-btn.like-btn:hover i {
    animation: heartBeat 0.4s ease;
}

@keyframes heartBeat {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.3); }
}

/* 作者信息卡 */
.author-card {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background: var(--bg-hover);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-lg);
}

.author-avatar {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid var(--bg-card);
    box-shadow: var(--shadow);
    flex-shrink: 0;
}

.author-info-detail {
    flex: 1;
}

.author-name {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.author-bio {
    color: var(--text-secondary);
    font-size: 13px;
    margin-bottom: 8px;
}

.author-stats {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    font-size: 12px;
    color: var(--text-tertiary);
}

.author-stats span {
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

/* 相关文章 */
.related-posts {
    margin-bottom: var(--spacing-lg);
}

.related-title {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 14px;
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--text-primary);
}

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

.related-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 12px;
}

.related-item {
    display: block;
    padding: 14px;
    background: var(--bg-hover);
    border-radius: var(--border-radius);
    transition: all var(--transition);
}

.related-item:hover {
    background: var(--bg-active);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.related-item h4 {
    font-size: 14px;
    line-height: 1.5;
    margin-bottom: 8px;
    color: var(--text-primary);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.related-meta {
    font-size: 12px;
    color: var(--text-tertiary);
    display: flex;
    align-items: center;
}

/* ============================================================
   8. 侧边栏小工具
   ============================================================ */
.widget {
    background: var(--bg-card);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    transition: box-shadow var(--transition);
}

.widget:hover {
    box-shadow: var(--shadow-md);
}

.widget-title {
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 14px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border-color-light);
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-primary);
    position: relative;
}

.widget-title::before {
    content: '';
    display: inline-block;
    width: 4px;
    height: 16px;
    background: var(--primary);
    border-radius: 2px;
    flex-shrink: 0;
}

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

/* 关于卡片 */
.widget-about {
    text-align: center;
    padding: var(--spacing-lg) var(--spacing-md);
}

.about-avatar {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    object-fit: cover;
    margin: 0 auto 12px;
    border: 3px solid var(--bg-card);
    box-shadow: var(--shadow);
}

.about-name {
    font-size: 17px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.about-desc {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 12px;
    line-height: 1.6;
}

.about-social {
    display: flex;
    justify-content: center;
    gap: 10px;
}

.about-social a {
    width: 34px;
    height: 34px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--bg-hover);
    color: var(--text-secondary);
    font-size: 15px;
    transition: all var(--transition-fast);
}

.about-social a:hover {
    background: var(--primary);
    color: #fff;
    transform: translateY(-3px);
}

/* 热门文章排行 */
.widget-hot-posts ul li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 10px 0;
    border-bottom: 1px solid var(--border-color-light);
}

.widget-hot-posts ul li:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.widget-hot-posts .rank {
    flex-shrink: 0;
    width: 22px;
    height: 22px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 700;
    background: var(--bg-active);
    color: var(--text-tertiary);
    margin-top: 2px;
}

.widget-hot-posts ul li:nth-child(1) .rank {
    background: linear-gradient(135deg, #ff6b6b, #ee5a24);
    color: #fff;
}

.widget-hot-posts ul li:nth-child(2) .rank {
    background: linear-gradient(135deg, #feca57, #ff9f43);
    color: #fff;
}

.widget-hot-posts ul li:nth-child(3) .rank {
    background: linear-gradient(135deg, #54a0ff, #2e86de);
    color: #fff;
}

.widget-hot-posts .post-info {
    flex: 1;
    min-width: 0;
}

.widget-hot-posts .post-info a {
    font-size: 13px;
    color: var(--text-primary);
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.widget-hot-posts .post-info a:hover {
    color: var(--primary);
}

.widget-hot-posts .meta {
    font-size: 11px;
    color: var(--text-tertiary);
    margin-top: 4px;
}

/* 分类列表 */
.widget-categories ul li a {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 10px;
    border-radius: var(--border-radius-sm);
    color: var(--text-secondary);
    font-size: 13px;
    transition: all var(--transition-fast);
}

.widget-categories ul li a:hover {
    background: var(--primary-bg);
    color: var(--primary);
    padding-left: 14px;
}

.widget-categories .count {
    padding: 1px 8px;
    background: var(--bg-active);
    border-radius: var(--border-radius-full);
    font-size: 11px;
    color: var(--text-tertiary);
}

.widget-categories ul li a:hover .count {
    background: var(--primary);
    color: #fff;
}

/* 最新评论 */
.widget-recent-comments ul li {
    display: flex;
    gap: 10px;
    padding: 10px 0;
    border-bottom: 1px solid var(--border-color-light);
}

.widget-recent-comments ul li:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.widget-recent-comments img {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    object-fit: cover;
    flex-shrink: 0;
}

.widget-recent-comments .comment-info {
    flex: 1;
    min-width: 0;
}

.widget-recent-comments .name {
    font-size: 13px;
    font-weight: 500;
    color: var(--text-primary);
}

.widget-recent-comments .text {
    font-size: 12px;
    color: var(--text-secondary);
    margin: 2px 0;
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.widget-recent-comments .article a {
    font-size: 11px;
    color: var(--text-tertiary);
}

.widget-recent-comments .article a:hover {
    color: var(--primary);
}

/* 标签云 */
.tag-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tag-cloud a {
    display: inline-block;
    padding: 4px 12px;
    background: var(--bg-hover);
    color: var(--text-secondary);
    border-radius: var(--border-radius-full);
    font-size: 12px;
    transition: all var(--transition-fast);
}

.tag-cloud a:hover {
    background: var(--primary);
    color: #fff;
    transform: translateY(-2px);
}

/* 侧边栏搜索表单 */
.sidebar-search-form {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--bg-hover);
    border-radius: var(--border-radius-full);
    padding: 4px 4px 4px 16px;
    border: 1px solid transparent;
    transition: all var(--transition);
}

.sidebar-search-form:focus-within {
    background: var(--bg-card);
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-bg);
}

.sidebar-search-form input {
    flex: 1;
    min-width: 0;
    border: none;
    background: none;
    outline: none;
    color: var(--text-primary);
    font-size: 13px;
    padding: 6px 0;
}

.sidebar-search-form input::placeholder {
    color: var(--text-tertiary);
}

.sidebar-search-form button {
    width: 30px;
    height: 30px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    font-size: 12px;
    transition: all var(--transition-fast);
}

.sidebar-search-form button:hover {
    background: var(--primary-dark);
    transform: scale(1.05);
}

/* 站点统计 */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
    list-style: none;
    margin: 0;
    padding: 0;
}

.stats-grid li {
    text-align: center;
    padding: 12px 8px;
    background: var(--bg-hover);
    border-radius: var(--border-radius);
    transition: all var(--transition);
}

.stats-grid li:hover {
    background: var(--primary-bg);
    transform: translateY(-2px);
}

.stat-num {
    font-size: 22px;
    font-weight: 700;
    color: var(--primary);
    line-height: 1.2;
}

.stat-label {
    font-size: 12px;
    color: var(--text-tertiary);
    margin-top: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
}

.stat-label i {
    font-size: 11px;
}

/* 标签云项目（带计数） */
.tag-cloud .tag-item {
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.tag-count {
    padding: 0 6px;
    background: rgba(0, 0, 0, 0.08);
    border-radius: var(--border-radius-full);
    font-size: 10px;
    font-weight: 600;
    transition: all var(--transition-fast);
}

.tag-cloud a:hover .tag-count {
    background: rgba(255, 255, 255, 0.25);
    color: #fff;
}

.tag-level-1 { font-size: 12px !important; }
.tag-level-2 { font-size: 13px !important; }
.tag-level-3 { font-size: 14px !important; font-weight: 500; }
.tag-level-4 { font-size: 15px !important; font-weight: 600; }

/* 热门排行（显式 rank 类，兼容 :nth-child） */
.widget-hot-posts .rank.rank-top {
    color: #fff;
}

.widget-hot-posts .rank-1 {
    background: linear-gradient(135deg, #ff6b6b, #ee5a24);
}

.widget-hot-posts .rank-2 {
    background: linear-gradient(135deg, #feca57, #ff9f43);
}

.widget-hot-posts .rank-3 {
    background: linear-gradient(135deg, #54a0ff, #2e86de);
}

.widget-hot-posts .hot-posts-list {
    list-style: none;
    margin: 0;
    padding: 0;
}

/* ============================================================
   9. 评论区
   ============================================================ */
.comments-section {
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border-color-light);
}

.comments-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--text-primary);
}

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

.comment-form {
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-md);
    background: var(--bg-hover);
    border-radius: var(--border-radius);
}

.comment-form .form-row {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    margin-bottom: 10px;
}

.comment-form input[type="text"],
.comment-form input[type="email"],
.comment-form textarea {
    width: 100%;
    padding: 10px 14px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    color: var(--text-primary);
    font-size: 13px;
    outline: none;
    transition: all var(--transition-fast);
}

.comment-form input:focus,
.comment-form textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-bg);
}

.comment-form textarea {
    width: 100%;
    min-height: 100px;
    resize: vertical;
    line-height: 1.6;
}

.comment-form input::placeholder,
.comment-form textarea::placeholder {
    color: var(--text-tertiary);
}

.btn-submit {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 9px 24px;
    background: var(--primary);
    color: #fff;
    border-radius: var(--border-radius-full);
    font-size: 13px;
    font-weight: 500;
    transition: all var(--transition);
}

.btn-submit:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-primary);
}

.btn-submit:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* 回复提示 */
.comment-reply-hint {
    display: none;
    align-items: center;
    gap: 6px;
    padding: 8px 12px;
    margin-bottom: 10px;
    background: var(--primary-bg);
    border-radius: var(--border-radius-sm);
    font-size: 12px;
    color: var(--primary);
}

.comment-reply-hint.show {
    display: flex;
}

.comment-reply-hint .cancel-reply {
    margin-left: auto;
    color: var(--danger);
    cursor: pointer;
}

/* 评论列表 */
.comment-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.comment-item {
    display: flex;
    gap: 12px;
    padding: var(--spacing-md);
    background: var(--bg-card);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    transition: box-shadow var(--transition);
}

.comment-item:hover {
    box-shadow: var(--shadow);
}

.comment-avatar {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    object-fit: cover;
    flex-shrink: 0;
    border: 2px solid var(--border-color-light);
}

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

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

.comment-author {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
}

.role-badge {
    display: inline-block;
    padding: 1px 8px;
    border-radius: var(--border-radius-full);
    font-size: 10px;
    font-weight: 500;
    line-height: 1.6;
}

.role-badge.admin {
    background: var(--primary);
    color: #fff;
}

.role-badge.editor {
    background: var(--success-bg);
    color: var(--success);
}

.comment-time {
    font-size: 12px;
    color: var(--text-tertiary);
    margin-left: auto;
}

.comment-content {
    font-size: 14px;
    line-height: 1.7;
    color: var(--text-primary);
    word-break: break-word;
}

.comment-actions {
    display: flex;
    gap: 16px;
    margin-top: 8px;
}

.comment-actions a {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 12px;
    color: var(--text-tertiary);
    transition: color var(--transition-fast);
}

.comment-actions a:hover {
    color: var(--primary);
}

.comment-actions .like-btn.liked {
    color: var(--danger);
}

/* 多级嵌套 */
.comment-replies {
    margin-top: 12px;
    margin-left: 8px;
    padding-left: 16px;
    border-left: 2px solid var(--border-color-light);
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.comment-replies .comment-item {
    padding: 12px;
    box-shadow: none;
    background: var(--bg-hover);
}

/* ============================================================
   10. 说说/心情页面
   ============================================================ */
.mood-card {
    background: var(--bg-card);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    transition: all var(--transition);
}

.mood-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.mood-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 14px;
}

.mood-header img {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--border-color-light);
}

.mood-author {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
}

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

.mood-content {
    font-size: 15px;
    line-height: 1.8;
    color: var(--text-primary);
    margin-bottom: 14px;
    white-space: pre-wrap;
    word-break: break-word;
}

.mood-tag {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 3px 12px;
    border-radius: var(--border-radius-full);
    font-size: 12px;
    margin-bottom: 14px;
}

.mood-tag.happy { background: rgba(82, 196, 26, 0.1); color: var(--success); }
.mood-tag.excited { background: var(--warning-bg); color: var(--warning); }
.mood-tag.sad { background: rgba(89, 160, 255, 0.1); color: #54a0ff; }
.mood-tag.angry { background: var(--danger-bg); color: var(--danger); }
.mood-tag.tired { background: rgba(165, 94, 234, 0.1); color: #a55eea; }
.mood-tag.thinking { background: var(--primary-bg); color: var(--primary); }

.mood-actions {
    display: flex;
    gap: 20px;
    padding-top: 12px;
    border-top: 1px solid var(--border-color-light);
}

.mood-actions a {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    font-size: 13px;
    color: var(--text-tertiary);
    transition: color var(--transition-fast);
}

.mood-actions a:hover {
    color: var(--primary);
}

.mood-actions .like-btn.liked {
    color: var(--danger);
}

.mood-actions .like-btn.liked i {
    animation: heartBeat 0.4s ease;
}

/* ============================================================
   11. 友情链接
   ============================================================ */
.links-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 14px;
}

.link-card {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 16px;
    background: var(--bg-card);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    transition: all var(--transition);
    border: 1px solid var(--border-color-light);
}

.link-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary);
}

.link-logo {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary);
    color: #fff;
    font-size: 20px;
    font-weight: 700;
    flex-shrink: 0;
}

.link-logo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.link-info {
    flex: 1;
    min-width: 0;
}

.link-name {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 2px;
}

.link-desc {
    font-size: 12px;
    color: var(--text-tertiary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* ============================================================
   12. 分页
   ============================================================ */
.pagination {
    display: flex;
    justify-content: center;
    margin-top: var(--spacing-xl);
}

.pagination ul {
    display: flex;
    align-items: center;
    gap: 6px;
}

.pagination li a,
.pagination li span {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 36px;
    height: 36px;
    padding: 0 10px;
    background: var(--bg-card);
    color: var(--text-secondary);
    border-radius: var(--border-radius-sm);
    font-size: 13px;
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-sm);
}

.pagination li a:hover {
    background: var(--primary);
    color: #fff;
    transform: translateY(-2px);
    box-shadow: var(--shadow-primary);
}

.pagination li.active span {
    background: var(--primary);
    color: #fff;
    font-weight: 600;
    box-shadow: var(--shadow-primary);
}

.pagination li.disabled span {
    color: var(--text-tertiary);
    cursor: not-allowed;
    opacity: 0.5;
}

.pagination li.ellipsis span {
    background: transparent;
    box-shadow: none;
}

/* 加载更多按钮 */
.load-more-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    padding: 12px;
    margin-top: var(--spacing-md);
    background: var(--bg-card);
    color: var(--text-secondary);
    border-radius: var(--border-radius);
    font-size: 14px;
    font-weight: 500;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition);
}

.load-more-btn:hover {
    background: var(--primary);
    color: #fff;
    box-shadow: var(--shadow-primary);
}

.load-more-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.load-more-btn .loading-spinner {
    display: none;
    width: 16px;
    height: 16px;
    border: 2px solid currentColor;
    border-top-color: transparent;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

.load-more-btn.loading .loading-spinner {
    display: block;
}

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

/* ============================================================
   13. 表单页面 (登录/注册)
   ============================================================ */
.auth-page {
    min-height: 60vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl) 0;
}

.auth-card {
    width: 100%;
    max-width: 420px;
    background: var(--bg-card);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-xl);
}

.auth-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 6px;
    text-align: center;
}

.auth-subtitle {
    font-size: 14px;
    color: var(--text-tertiary);
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.form-group input {
    width: 100%;
    padding: 11px 14px;
    background: var(--bg-hover);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    color: var(--text-primary);
    font-size: 14px;
    outline: none;
    transition: all var(--transition-fast);
}

.form-group input:focus {
    border-color: var(--primary);
    background: var(--bg-card);
    box-shadow: 0 0 0 3px var(--primary-bg);
}

.form-group input::placeholder {
    color: var(--text-tertiary);
}

.btn-auth {
    width: 100%;
    padding: 12px;
    background: var(--primary);
    color: #fff;
    border-radius: var(--border-radius-sm);
    font-size: 15px;
    font-weight: 600;
    letter-spacing: 2px;
    transition: all var(--transition);
    margin-top: var(--spacing-sm);
}

.btn-auth:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-primary);
}

.auth-footer {
    text-align: center;
    margin-top: var(--spacing-lg);
    font-size: 13px;
    color: var(--text-tertiary);
}

.auth-footer a {
    color: var(--primary);
    font-weight: 500;
}

.alert {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 14px;
    border-radius: var(--border-radius-sm);
    font-size: 13px;
    margin-bottom: var(--spacing-md);
}

.alert-danger {
    background: var(--danger-bg);
    color: var(--danger);
}

.alert-success {
    background: var(--success-bg);
    color: var(--success);
}

/* 页面头部 */
.page-header {
    background: var(--bg-card);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    text-align: center;
}

.page-header h1 {
    font-size: 22px;
    color: var(--text-primary);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.page-header h1 i {
    color: var(--primary);
}

.page-description {
    font-size: 13px;
    color: var(--text-tertiary);
    margin-top: 6px;
}

/* ============================================================
   14. 页脚
   ============================================================ */
.footer {
    background: var(--bg-card);
    border-top: 1px solid var(--border-color);
    padding: var(--spacing-xl) 0 var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.footer-inner {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    text-align: center;
}

.footer-social {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: var(--spacing-md);
}

.footer-social a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--bg-hover);
    color: var(--text-secondary);
    font-size: 17px;
    transition: all var(--transition);
}

.footer-social a:hover {
    background: var(--primary);
    color: #fff;
    transform: translateY(-4px);
    box-shadow: var(--shadow-primary);
}

.footer-links {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 20px;
    margin-bottom: var(--spacing-md);
}

.footer-links a {
    color: var(--text-secondary);
    font-size: 13px;
    transition: color var(--transition-fast);
}

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

.footer-info {
    font-size: 13px;
    color: var(--text-tertiary);
}

.footer-info a {
    color: var(--text-tertiary);
}

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

/* ============================================================
   15. 回到顶部 & 阅读进度条
   ============================================================ */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    font-size: 18px;
    box-shadow: var(--shadow-lg);
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition);
    z-index: 900;
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: var(--primary-dark);
    transform: translateY(-4px);
}

.reading-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 0%;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--primary-light));
    z-index: 1100;
    transition: width 0.1s linear;
    box-shadow: 0 0 8px var(--primary);
}

/* ============================================================
   16. Toast 通知
   ============================================================ */
.toast-container {
    position: fixed;
    top: calc(var(--navbar-height) + 16px);
    right: 20px;
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: 10px;
    pointer-events: none;
}

.toast {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 18px;
    background: var(--bg-card);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    font-size: 13px;
    color: var(--text-primary);
    min-width: 240px;
    max-width: 360px;
    border-left: 4px solid var(--primary);
    pointer-events: auto;
    animation: toastSlideIn 0.3s ease;
}

.toast.toast-out {
    animation: toastSlideOut 0.3s ease forwards;
}

.toast i {
    font-size: 16px;
    flex-shrink: 0;
}

.toast.success { border-left-color: var(--success); }
.toast.success i { color: var(--success); }
.toast.error { border-left-color: var(--danger); }
.toast.error i { color: var(--danger); }
.toast.warning { border-left-color: var(--warning); }
.toast.warning i { color: var(--warning); }
.toast.info { border-left-color: var(--primary); }
.toast.info i { color: var(--primary); }

@keyframes toastSlideIn {
    from {
        opacity: 0;
        transform: translateX(100%);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes toastSlideOut {
    to {
        opacity: 0;
        transform: translateX(100%);
    }
}

/* ============================================================
   17. 加载动画 & 空状态
   ============================================================ */
.empty-state {
    grid-column: 1 / -1;
    text-align: center;
    padding: 80px 20px;
    background: var(--bg-card);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow);
    min-height: 300px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.empty-state .icon {
    font-size: 56px;
    color: var(--text-tertiary);
    margin-bottom: 16px;
    opacity: 0.5;
}

.empty-state .title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.empty-state .description {
    font-size: 13px;
    color: var(--text-tertiary);
}

/* 全局加载动画 */
.loading-overlay {
    position: fixed;
    inset: 0;
    background: var(--bg-body);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 3000;
    transition: opacity 0.4s ease;
}

.loading-overlay.hidden {
    opacity: 0;
    pointer-events: none;
}

.loading-spinner-large {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border-color);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

/* 骨架屏 */
.skeleton {
    background: linear-gradient(90deg, var(--bg-hover) 25%, var(--bg-active) 50%, var(--bg-hover) 75%);
    background-size: 200% 100%;
    animation: skeletonShimmer 1.5s ease-in-out infinite;
    border-radius: var(--border-radius);
}

@keyframes skeletonShimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* ============================================================
   18. 图片灯箱
   ============================================================ */
.lightbox {
    position: fixed;
    inset: 0;
    background: var(--bg-overlay);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2500;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition);
    padding: 30px;
    cursor: zoom-out;
}

.lightbox.open {
    opacity: 1;
    visibility: visible;
}

.lightbox img {
    max-width: 90%;
    max-height: 90vh;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    transform: scale(0.8);
    transition: transform var(--transition);
}

.lightbox.open img {
    transform: scale(1);
}

.lightbox-close {
    position: absolute;
    top: 20px;
    right: 24px;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.15);
    color: #fff;
    font-size: 20px;
    transition: all var(--transition-fast);
}

.lightbox-close:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: rotate(90deg);
}

/* ============================================================
   19. 表情选择器
   ============================================================ */
.emoji-picker {
    position: absolute;
    bottom: 100%;
    left: 0;
    margin-bottom: 8px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    padding: 10px;
    display: none;
    z-index: 100;
    max-width: 320px;
}

.emoji-picker.show {
    display: block;
    animation: emojiFadeIn 0.2s ease;
}

@keyframes emojiFadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

.emoji-grid {
    display: grid;
    grid-template-columns: repeat(8, 1fr);
    gap: 4px;
}

.emoji-grid span {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    font-size: 20px;
    transition: all var(--transition-fast);
}

.emoji-grid span:hover {
    background: var(--bg-hover);
    transform: scale(1.2);
}

/* ============================================================
   20. 响应式 (移动端适配)
   ============================================================ */
@media (max-width: 992px) {
    :root {
        --sidebar-width: 260px;
    }

    .main-layout {
        flex-direction: column;
        align-items: stretch;
    }

    .sidebar {
        width: 100%;
        position: static;
        order: 2;
    }

    .content-area {
        order: 1;
        width: 100%;
    }

    .related-list {
        grid-template-columns: 1fr;
    }

    /* 992px以下显示汉堡按钮 */
    .navbar-toggle {
        display: flex;
    }

    /* 992px以下隐藏导航菜单（改为下拉式） */
    .navbar-menu {
        position: fixed;
        top: var(--navbar-height);
        left: 0;
        right: 0;
        flex-direction: column;
        align-items: stretch;
        background: var(--bg-card);
        padding: 10px;
        gap: 2px;
        box-shadow: var(--shadow-lg);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition);
        max-height: calc(100vh - var(--navbar-height));
        overflow-y: auto;
        z-index: 999;
    }

    .navbar-menu.show {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .navbar-menu > li > a {
        padding: 12px 16px;
        border-radius: var(--border-radius-sm);
    }

    .navbar-menu > li > a::after {
        display: none;
    }

    /* 移动端搜索：默认显示为圆形图标按钮，点击后展开为固定搜索条 */
    .navbar-search {
        display: flex;
        align-items: center;
        background: none;
        padding: 0;
        border: none;
        border-radius: 50%;
    }

    .navbar-search input {
        display: none;
    }

    .navbar-search button {
        width: 36px;
        height: 36px;
        background: var(--bg-hover);
        color: var(--text-secondary);
    }

    .navbar-search.show {
        position: fixed;
        top: var(--navbar-height);
        left: 0;
        right: 0;
        padding: 12px 16px;
        background: var(--bg-card);
        border-radius: 0;
        z-index: 999;
        border-bottom: 1px solid var(--border-color);
        gap: 8px;
    }

    .navbar-search.show input {
        display: block;
        width: 100%;
        flex: 1;
    }

    .navbar-search.show button {
        flex-shrink: 0;
        background: var(--primary);
        color: #fff;
    }
}

@media (max-width: 768px) {
    :root {
        --navbar-height: 56px;
    }

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

    .article-title {
        font-size: 20px;
    }

    .article-body {
        font-size: 14px;
    }

    .article-body h2 {
        font-size: 18px;
    }

    .article-body h3 {
        font-size: 16px;
    }

    .article-meta {
        gap: 10px;
    }

    .post-content {
        padding: var(--spacing-md);
    }

    .post-title {
        font-size: 16px;
    }

    .author-card {
        flex-direction: column;
        text-align: center;
        align-items: center;
    }

    .comment-form .form-row {
        grid-template-columns: 1fr;
    }

    .comment-replies {
        margin-left: 0;
        padding-left: 10px;
    }

    .comment-time {
        margin-left: 0;
        width: 100%;
    }

    .back-to-top {
        bottom: 20px;
        right: 16px;
        width: 40px;
        height: 40px;
    }

    .toast-container {
        top: auto;
        bottom: 20px;
        right: 16px;
        left: 16px;
    }

    .toast {
        min-width: auto;
        max-width: 100%;
    }

    .auth-card {
        padding: var(--spacing-lg);
    }

    .article-actions {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 12px;
    }

    .article-header,
    .article-body,
    .article-footer {
        padding-left: var(--spacing-md);
        padding-right: var(--spacing-md);
    }

    .post-meta {
        gap: 8px;
        font-size: 11px;
    }

    .links-grid {
        grid-template-columns: 1fr;
    }
}

/* ============================================================
   21. 工具类 & 杂项
   ============================================================ */
.text-center { text-align: center; }
.text-primary { color: var(--primary) !important; }
.text-danger { color: var(--danger) !important; }
.text-success { color: var(--success) !important; }
.mt-0 { margin-top: 0 !important; }
.mb-0 { margin-bottom: 0 !important; }
.hidden { display: none !important; }

img[data-src] {
    opacity: 0;
    transition: opacity var(--transition);
}

img[data-src].loaded {
    opacity: 1;
}

/* 移动端遮罩 */
.mobile-overlay {
    position: fixed;
    inset: 0;
    background: var(--bg-overlay);
    z-index: 998;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition);
}

.mobile-overlay.show {
    opacity: 1;
    visibility: visible;
}

/* 搜索结果高亮 */
.search-highlight {
    background: var(--warning-bg);
    color: var(--warning);
    padding: 0 2px;
    border-radius: 2px;
}