/*
 * 极致简洁主题 - 主样式文件
 * 所有CSS类名均以 quhj 开头
 * 版权所有：quhj.com
 */

/* ========== 基础重置 ========== */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    font-size: 15px;
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: background-color 0.3s ease, color 0.3s ease;
}

a {
    text-decoration: none;
    color: inherit;
    transition: all 0.2s ease;
}

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

ul, ol {
    list-style: none;
}

/* ========== 主题变量 - 日间模式 ========== */
.quhj-light-mode {
    --quhj-text-color: #1a1a1a;
    --quhj-text-secondary: #666666;
    --quhj-text-muted: #999999;
    --quhj-border-color: #e5e5e5;
    --quhj-bg-color: #f8f9fa;
    --quhj-accent-color: #000000;
    --quhj-link-hover: #333333;
    --quhj-box-shadow: 0 2px 20px rgba(0, 0, 0, 0.06);
    --quhj-box-shadow-hover: 0 4px 30px rgba(0, 0, 0, 0.1);
}

/* ========== 主题变量 - 黑夜模式 ========== */
.quhj-dark-mode {
    --quhj-text-color: #e8e8e8;
    --quhj-text-secondary: #a0a0a0;
    --quhj-text-muted: #666666;
    --quhj-border-color: #333333;
    --quhj-bg-color: #0a0a0a;
    --quhj-accent-color: #ffffff;
    --quhj-link-hover: #cccccc;
    --quhj-box-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
    --quhj-box-shadow-hover: 0 4px 30px rgba(0, 0, 0, 0.5);
}

body {
    background-color: var(--quhj-bg-color);
    color: var(--quhj-text-color);
}

/* ========== 背景Canvas容器 ========== */
.quhj-bg-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    pointer-events: none;
}

/* ========== 头部导航 ========== */
.quhj-header {
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.quhj-nav {
    border-bottom: 1px solid var(--quhj-border-color);
    transition: all 0.3s ease;
}

.quhj-nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* ========== LOGO ========== */
.quhj-logo {
    display: flex;
    align-items: center;
}

.quhj-logo-link {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 18px;
    color: var(--quhj-text-color);
}

.quhj-logo-link img {
    height: 32px;
    width: auto;
}

.quhj-site-title {
    letter-spacing: 0.5px;
}

/* ========== 菜单包装 ========== */
.quhj-menu-wrapper {
    display: flex;
    align-items: center;
    gap: 20px;
}

/* ========== 导航菜单 ========== */
.quhj-nav-menu {
    display: flex;
    align-items: center;
    gap: 8px;
}

.quhj-nav-menu > li {
    position: relative;
}

.quhj-nav-menu > li > a {
    display: block;
    padding: 8px 16px;
    font-size: 14px;
    font-weight: 500;
    color: var(--quhj-text-secondary);
    border-radius: 6px;
    position: relative;
    transition: all 0.25s ease;
}

.quhj-nav-menu > li > a::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 50%;
    transform: translateX(-50%) scaleX(0);
    width: 20px;
    height: 2px;
    background-color: var(--quhj-accent-color);
    border-radius: 1px;
    transition: transform 0.3s ease;
}

.quhj-nav-menu > li > a:hover,
.quhj-nav-menu > li.current-menu-item > a,
.quhj-nav-menu > li.current-category-ancestor > a {
    color: var(--quhj-accent-color);
}

.quhj-nav-menu > li > a:hover::after,
.quhj-nav-menu > li.current-menu-item > a::after,
.quhj-nav-menu > li.current-category-ancestor > a::after {
    transform: translateX(-50%) scaleX(1);
}

/* 子菜单 */
.quhj-nav-menu .sub-menu {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 160px;
    padding: 8px 0;
    background-color: inherit;
    border: 1px solid var(--quhj-border-color);
    border-radius: 8px;
    box-shadow: var(--quhj-box-shadow);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all 0.25s ease;
}

.quhj-nav-menu > li:hover > .sub-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.quhj-nav-menu .sub-menu li a {
    display: block;
    padding: 8px 16px;
    font-size: 14px;
    color: var(--quhj-text-secondary);
    transition: all 0.2s ease;
}

.quhj-nav-menu .sub-menu li a:hover {
    color: var(--quhj-accent-color);
    background-color: rgba(0, 0, 0, 0.03);
}

/* ========== 导航工具栏 ========== */
.quhj-nav-tools {
    display: flex;
    align-items: center;
    gap: 8px;
}

.quhj-icon-btn {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    background: transparent;
    color: var(--quhj-text-secondary);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.quhj-icon-btn:hover {
    color: var(--quhj-accent-color);
    background-color: rgba(0, 0, 0, 0.05);
}

.quhj-dark-mode .quhj-icon-btn:hover {
    background-color: rgba(255, 255, 255, 0.08);
}

.quhj-icon {
    width: 20px;
    height: 20px;
}

/* 主题切换图标显示控制 */
.quhj-icon-sun,
.quhj-icon-moon {
    position: absolute;
    transition: all 0.3s ease;
}

.quhj-light-mode .quhj-icon-sun {
    opacity: 0;
    transform: rotate(90deg) scale(0.5);
}

.quhj-light-mode .quhj-icon-moon {
    opacity: 1;
    transform: rotate(0) scale(1);
}

.quhj-dark-mode .quhj-icon-sun {
    opacity: 1;
    transform: rotate(0) scale(1);
}

.quhj-dark-mode .quhj-icon-moon {
    opacity: 0;
    transform: rotate(-90deg) scale(0.5);
}

#quhj-theme-toggle {
    position: relative;
}

.quhj-bg-disabled {
    opacity: 0.4;
}

/* ========== 主内容区 ========== */
.quhj-main {
    min-height: calc(100vh - 64px - 120px);
    padding: 30px 20px 40px;
}

.quhj-container {
    max-width: 550px;
    margin: 0 auto;
}

/* ========== 子导航（内容上方导航） ========== */
.quhj-sub-nav {
    margin-bottom: 20px;
    border-radius: 12px;
    padding: 12px 20px;
    background-color: var(--quhj-content-box-bg, #ffffff);
    border: 1px solid var(--quhj-border-color);
    box-shadow: var(--quhj-box-shadow);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.quhj-dark-mode .quhj-sub-nav {
    background-color: var(--quhj-content-box-bg, #1a1a1a);
}

.quhj-sub-nav-menu {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    flex-wrap: wrap;
}

.quhj-sub-nav-menu > li {
    position: relative;
}

.quhj-sub-nav-menu > li > a {
    display: block;
    padding: 6px 16px;
    font-size: 14px;
    font-weight: 500;
    color: var(--quhj-text-secondary);
    border-radius: 20px;
    transition: all 0.25s ease;
}

.quhj-sub-nav-menu > li > a:hover,
.quhj-sub-nav-menu > li.current-menu-item > a,
.quhj-sub-nav-menu > li.current-category-ancestor > a {
    color: var(--quhj-bg-color);
    background-color: var(--quhj-accent-color);
}

/* 子菜单 */
.quhj-sub-nav-menu .sub-menu {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    min-width: 140px;
    padding: 8px 0;
    background-color: var(--quhj-content-box-bg, #ffffff);
    border: 1px solid var(--quhj-border-color);
    border-radius: 10px;
    box-shadow: var(--quhj-box-shadow);
    opacity: 0;
    visibility: hidden;
    margin-top: 8px;
    transition: all 0.25s ease;
    z-index: 50;
}

.quhj-dark-mode .quhj-sub-nav-menu .sub-menu {
    background-color: var(--quhj-content-box-bg, #1a1a1a);
}

.quhj-sub-nav-menu > li:hover > .sub-menu {
    opacity: 1;
    visibility: visible;
    margin-top: 4px;
}

.quhj-sub-nav-menu .sub-menu li a {
    display: block;
    padding: 8px 16px;
    font-size: 13px;
    text-align: center;
    color: var(--quhj-text-secondary);
    transition: all 0.2s ease;
}

.quhj-sub-nav-menu .sub-menu li a:hover {
    color: var(--quhj-accent-color);
}

/* ========== 内容框 ========== */
.quhj-content-box {
    border-radius: 16px;
    padding: 40px;
    box-shadow: var(--quhj-box-shadow);
    border: 1px solid var(--quhj-border-color);
    transition: all 0.3s ease;
}

.quhj-content-box:hover {
    box-shadow: var(--quhj-box-shadow-hover);
}

/* ========== 页面标题 ========== */
.quhj-page-header {
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--quhj-border-color);
}

.quhj-page-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--quhj-text-color);
}

.quhj-archive-description {
    margin-top: 10px;
    font-size: 14px;
    color: var(--quhj-text-muted);
}

/* ========== 文章列表 ========== */
.quhj-post-list {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.quhj-post-item {
    padding-bottom: 30px;
    border-bottom: 1px solid var(--quhj-border-color);
    transition: transform 0.2s ease;
}

.quhj-post-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.quhj-post-item:hover {
    transform: translateY(-2px);
}

.quhj-post-thumbnail {
    margin-bottom: 16px;
    border-radius: 10px;
    overflow: hidden;
}

.quhj-post-thumbnail img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.quhj-post-item:hover .quhj-post-thumbnail img {
    transform: scale(1.03);
}

.quhj-post-header {
    margin-bottom: 12px;
}

.quhj-post-date {
    font-size: 13px;
    color: var(--quhj-text-muted);
    margin-bottom: 6px;
}

.quhj-post-title {
    font-size: 20px;
    font-weight: 700;
    line-height: 1.4;
    color: var(--quhj-text-color);
}

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

.quhj-post-excerpt {
    font-size: 14px;
    line-height: 1.8;
    color: var(--quhj-text-secondary);
    margin-bottom: 12px;
}

.quhj-post-more {
    text-align: right;
}

.quhj-read-more {
    font-size: 13px;
    font-weight: 500;
    color: var(--quhj-text-muted);
    transition: all 0.2s ease;
}

.quhj-read-more:hover {
    color: var(--quhj-accent-color);
}

/* ========== 文章详情页 ========== */
.quhj-single-header {
    margin-bottom: 24px;
    text-align: center;
}

.quhj-single-date {
    font-size: 13px;
    color: var(--quhj-text-muted);
    margin-bottom: 10px;
}

.quhj-single-title {
    font-size: 26px;
    font-weight: 700;
    line-height: 1.4;
    color: var(--quhj-text-color);
}

.quhj-single-thumbnail {
    margin-bottom: 24px;
    border-radius: 12px;
    overflow: hidden;
}

.quhj-single-thumbnail img {
    width: 100%;
    height: auto;
}

.quhj-single-content {
    font-size: 15px;
    line-height: 1.9;
    color: var(--quhj-text-color);
}

.quhj-single-content p {
    margin-bottom: 16px;
}

.quhj-single-content h1,
.quhj-single-content h2,
.quhj-single-content h3,
.quhj-single-content h4,
.quhj-single-content h5,
.quhj-single-content h6 {
    margin: 24px 0 12px;
    font-weight: 700;
    line-height: 1.4;
    color: var(--quhj-text-color);
}

.quhj-single-content h2 { font-size: 22px; }
.quhj-single-content h3 { font-size: 19px; }
.quhj-single-content h4 { font-size: 17px; }

.quhj-single-content blockquote {
    margin: 20px 0;
    padding: 16px 20px;
    border-left: 3px solid var(--quhj-accent-color);
    background-color: rgba(0, 0, 0, 0.02);
    color: var(--quhj-text-secondary);
    font-style: italic;
}

.quhj-dark-mode .quhj-single-content blockquote {
    background-color: rgba(255, 255, 255, 0.03);
}

.quhj-single-content ul,
.quhj-single-content ol {
    margin: 16px 0;
    padding-left: 24px;
}

.quhj-single-content ul { list-style: disc; }
.quhj-single-content ol { list-style: decimal; }

.quhj-single-content li {
    margin-bottom: 8px;
}

.quhj-single-content img {
    border-radius: 8px;
    margin: 16px 0;
}

.quhj-single-content a {
    color: var(--quhj-accent-color);
    border-bottom: 1px solid var(--quhj-border-color);
}

.quhj-single-content a:hover {
    border-bottom-color: var(--quhj-accent-color);
}

.quhj-single-content code {
    padding: 2px 6px;
    font-size: 13px;
    background-color: rgba(0, 0, 0, 0.05);
    border-radius: 4px;
    font-family: "SF Mono", Monaco, Consolas, monospace;
}

.quhj-dark-mode .quhj-single-content code {
    background-color: rgba(255, 255, 255, 0.1);
}

.quhj-single-content pre {
    margin: 20px 0;
    padding: 16px;
    background-color: rgba(0, 0, 0, 0.03);
    border-radius: 8px;
    overflow-x: auto;
}

.quhj-dark-mode .quhj-single-content pre {
    background-color: rgba(255, 255, 255, 0.05);
}

.quhj-single-content pre code {
    background: none;
    padding: 0;
}

.quhj-page-links {
    margin: 24px 0;
    text-align: center;
    color: var(--quhj-text-muted);
}

/* ========== 文章页脚 ========== */
.quhj-single-footer {
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid var(--quhj-border-color);
    font-size: 13px;
    color: var(--quhj-text-muted);
}

.quhj-post-categories,
.quhj-post-tags {
    margin-bottom: 8px;
}

.quhj-post-tags a {
    display: inline-block;
    margin-right: 8px;
    padding: 2px 10px;
    background-color: rgba(0, 0, 0, 0.05);
    border-radius: 12px;
    font-size: 12px;
    transition: all 0.2s ease;
}

.quhj-dark-mode .quhj-post-tags a {
    background-color: rgba(255, 255, 255, 0.08);
}

.quhj-post-tags a:hover {
    background-color: var(--quhj-accent-color);
    color: var(--quhj-bg-color);
}

/* ========== 文章导航 ========== */
.quhj-post-navigation {
    display: flex;
    justify-content: space-between;
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid var(--quhj-border-color);
    font-size: 14px;
}

.quhj-post-navigation a {
    color: var(--quhj-text-secondary);
    transition: color 0.2s ease;
}

.quhj-post-navigation a:hover {
    color: var(--quhj-accent-color);
}

/* ========== 分页 ========== */
.quhj-pagination {
    margin-top: 40px;
    text-align: center;
}

.quhj-pagination .page-numbers {
    display: inline-block;
    padding: 6px 14px;
    margin: 0 4px;
    border-radius: 6px;
    font-size: 14px;
    color: var(--quhj-text-secondary);
    transition: all 0.2s ease;
}

.quhj-pagination .page-numbers:hover {
    color: var(--quhj-accent-color);
    background-color: rgba(0, 0, 0, 0.05);
}

.quhj-dark-mode .quhj-pagination .page-numbers:hover {
    background-color: rgba(255, 255, 255, 0.08);
}

.quhj-pagination .page-numbers.current {
    background-color: var(--quhj-accent-color);
    color: var(--quhj-bg-color);
}

/* ========== 404页面 ========== */
.quhj-error-404 {
    text-align: center;
    padding: 40px 20px;
}

.quhj-404-title {
    font-size: 72px;
    font-weight: 800;
    color: var(--quhj-accent-color);
    margin-bottom: 16px;
    letter-spacing: -2px;
}

.quhj-404-message {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--quhj-text-color);
}

.quhj-404-hint {
    font-size: 14px;
    color: var(--quhj-text-muted);
    margin-bottom: 24px;
}

.quhj-btn {
    display: inline-block;
    padding: 10px 24px;
    background-color: var(--quhj-accent-color);
    color: var(--quhj-bg-color);
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.2s ease;
}

.quhj-btn:hover {
    opacity: 0.85;
    transform: translateY(-1px);
}

/* ========== 无文章 ========== */
.quhj-no-posts {
    text-align: center;
    padding: 40px 20px;
    color: var(--quhj-text-muted);
}

/* ========== 页脚 ========== */
.quhj-footer {
    padding: 30px 20px;
    border-top: 1px solid var(--quhj-border-color);
    text-align: center;
}

.quhj-footer-container {
    max-width: 550px;
    margin: 0 auto;
}

.quhj-footer-info {
    margin-bottom: 12px;
}

.quhj-footer-link {
    display: inline-block;
    margin: 0 10px;
    font-size: 12px;
    color: var(--quhj-text-muted);
    transition: color 0.2s ease;
}

.quhj-footer-link:hover {
    color: var(--quhj-text-secondary);
}

.quhj-footer-copyright p {
    font-size: 12px;
    color: var(--quhj-text-muted);
    margin-bottom: 4px;
}

.quhj-powered {
    font-size: 11px !important;
    opacity: 0.7;
}

/* ========== 评论区 ========== */
#comments {
    margin-top: 40px;
    padding-top: 30px;
    border-top: 1px solid var(--quhj-border-color);
}

.comments-title {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--quhj-text-color);
}

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

.comment {
    padding: 16px 0;
    border-bottom: 1px solid var(--quhj-border-color);
}

.comment:last-child {
    border-bottom: none;
}

.comment-author {
    font-weight: 600;
    font-size: 14px;
    margin-bottom: 4px;
    color: var(--quhj-text-color);
}

.comment-meta {
    font-size: 12px;
    color: var(--quhj-text-muted);
    margin-bottom: 8px;
}

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

.comment-reply-link {
    font-size: 12px;
    color: var(--quhj-text-muted);
}

/* 评论表单 */
.comment-respond {
    margin-top: 30px;
}

.comment-reply-title {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--quhj-text-color);
}

.comment-form p {
    margin-bottom: 16px;
}

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

.comment-form input[type="text"],
.comment-form input[type="email"],
.comment-form input[type="url"],
.comment-form textarea {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--quhj-border-color);
    border-radius: 8px;
    font-size: 14px;
    background-color: transparent;
    color: var(--quhj-text-color);
    transition: border-color 0.2s ease;
    font-family: inherit;
}

.comment-form input:focus,
.comment-form textarea:focus {
    outline: none;
    border-color: var(--quhj-accent-color);
}

.comment-form textarea {
    resize: vertical;
    min-height: 120px;
}

.form-submit input[type="submit"] {
    padding: 10px 24px;
    background-color: var(--quhj-accent-color);
    color: var(--quhj-bg-color);
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.form-submit input[type="submit"]:hover {
    opacity: 0.85;
}

/* ========== 搜索表单 ========== */
.search-form {
    display: flex;
    gap: 8px;
    margin-top: 16px;
}

.search-form .search-field {
    flex: 1;
    padding: 8px 14px;
    border: 1px solid var(--quhj-border-color);
    border-radius: 8px;
    font-size: 14px;
    background-color: transparent;
    color: var(--quhj-text-color);
}

.search-form .search-submit {
    padding: 8px 16px;
    background-color: var(--quhj-accent-color);
    color: var(--quhj-bg-color);
    border: none;
    border-radius: 8px;
    font-size: 14px;
    cursor: pointer;
}

/* ========== 响应式 ========== */
@media (max-width: 768px) {
    .quhj-nav-container {
        height: 56px;
        padding: 0 16px;
    }

    .quhj-menu-wrapper {
        gap: 12px;
    }

    .quhj-nav-menu {
        display: none;
    }

    .quhj-main {
        padding: 24px 16px;
    }

    .quhj-content-box {
        padding: 24px 20px;
        border-radius: 12px;
    }

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

    .quhj-single-title {
        font-size: 22px;
    }

    .quhj-post-thumbnail img {
        height: 160px;
    }

    .quhj-404-title {
        font-size: 56px;
    }
}

@media (max-width: 480px) {
    .quhj-content-box {
        padding: 20px 16px;
    }

    .quhj-post-list {
        gap: 24px;
    }

    .quhj-post-item {
        padding-bottom: 24px;
    }

    .quhj-single-title {
        font-size: 20px;
    }
}

/* ========== 滚动条样式 ========== */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

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

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

/* ========== 选中文字 ========== */
::selection {
    background-color: var(--quhj-accent-color);
    color: var(--quhj-bg-color);
}