:root {
    --bg-main: #1a1a1a;
    --bg-card: #222;
    --bg-hover: #2d2d2d;
    --text-main: #e0e0e0;
    --text-light: #aaa;
    --accent: #4da6ff;
    --accent-dark: #3a8ed8;
    --accent-light: #80bfff;
    --border-radius: 8px;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
    --transition: all 0.3s ease;
    --site-max-width: 1600px;
}

/* 动画定义 */
@keyframes bounceUp {
    0% { transform: translateY(0); box-shadow: var(--shadow); }
    60% { transform: translateY(-15px); box-shadow: 0 12px 20px rgba(0, 0, 0, 0.35); }
    80% { transform: translateY(-10px); box-shadow: 0 10px 18px rgba(0, 0, 0, 0.3); }
    100% { transform: translateY(-12px); box-shadow: 0 12px 24px rgba(77, 166, 255, 0.25); }
}

@keyframes blueGradientTitle {
    0% { color: white; text-shadow: 0 0 5px var(--accent); }
    25% { color: var(--accent-light); text-shadow: 0 0 8px var(--accent); }
    50% { color: var(--accent); text-shadow: 0 0 10px var(--accent); }
    75% { color: var(--accent-dark); text-shadow: 0 0 8px var(--accent); }
    100% { color: black; text-shadow: 0 0 5px var(--accent); }
}

/* 基础样式 */
body {
    background-color: var(--bg-main);
    color: var(--text-main);
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    transition: var(--transition);
    margin: 0;
    padding: 0;
    overflow-x: hidden;
}

a { color: var(--accent); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--accent-dark); }
pre, code { background: var(--bg-hover); color: #ccc; border-radius: 4px; }
blockquote { border-left: 3px solid var(--accent); color: var(--text-light); padding-left: 15px; margin: 1em 0; }

/* 容器样式 */
.container, .header-container, #footer .container, .friendlinks, #header > div, #body > div, #footer > div {
    max-width: var(--site-max-width);
    margin: 0 auto;
    padding: 0 20px;
    box-sizing: border-box;
    width: 100%;
}

/* 头部样式 */
#header {
    padding: 20px 0;
    border-bottom: 1px solid #333;
    background: var(--bg-main);
    z-index: 100;
    margin-bottom: 0;
    width: 100%;
    position: relative;
    min-height: 80px;
}

.header-container {
    max-width: var(--site-max-width);
    margin: 0 auto;
    padding: 0 20px;
    width: 100%;
    box-sizing: border-box;
}

.header-inner {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.site-branding {
    width: 100%;
    margin: 0;
    padding: 0;
}

#logo {
    font-size: 2em;
    font-weight: 600;
    animation: blueGradientTitle 5s ease-in-out infinite alternate;
    transition: text-shadow 0.3s ease;
    display: block;
    text-align: left;
}

#logo:hover {
    text-shadow: 0 0 15px rgba(77, 166, 255, 0.7);
    transform: scale(1.02);
    transition: all 0.3s ease;
}

.description {
    color: var(--text-light);
    margin: 8px 0 0;
    text-align: left;
    display: block;
}

/* 导航容器样式 */
.header-nav-wrapper {
    display: flex;
    align-items: center;
    width: 100%;
    gap: 20px;
    flex-wrap: nowrap;
}

/* 导航菜单基础样式 */
.nav-menu {
    margin: 0;
    padding: 0;
    display: flex;
    gap: 8px;
    min-width: 0;
}

.nav-menu a {
    display: block;
    padding: 8px 16px;
    border-radius: var(--border-radius);
    color: var(--text-main);
    border: none;
    transition: var(--transition);
    white-space: nowrap;
}

.nav-menu a:hover, .nav-menu .current {
    background: var(--accent);
    color: white;
    transform: translateY(-2px);
}

/* 搜索框样式 */
#search {
    margin: 0;
    display: flex;
    align-items: center;
    width: 320px;
}

#search input {
    background: var(--bg-card);
    border: 1px solid #333;
    color: var(--text-main);
    padding: 12px 16px;
    border-radius: var(--border-radius) 0 0 var(--border-radius);
    transition: var(--transition);
    font-size: 15px;
    border-right: none;
    flex: 1;
}

#search button {
    background: var(--accent);
    color: white;
    border: none;
    padding: 12px 16px;
    border-radius: 0 var(--border-radius) var(--border-radius) 0;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
}

#search button:hover {
    background-color: var(--accent-dark);
    transform: scale(1.05);
}

/* PC端样式 */
@media (min-width: 901px) {
    .header-nav-wrapper {
        justify-content: flex-start;
    }
    
    #nav-menu-desktop {
        flex: 0 1 auto;
        margin-right: auto;
    }
    
    #search {
        flex: 0 0 320px;
        margin-left: auto;
    }
    
    /* 隐藏移动端元素 */
    #menuToggle, #nav-menu-mobile {
        display: none !important;
    }
}

/* 移动端菜单按钮（方形小图标） */
#menuToggle {
    display: none;
    width: 44px;
    height: 44px;
    padding: 8px;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    position: absolute;
    top: 20px;
    right: 20px;
    cursor: pointer;
    z-index: 9995;
    background: var(--bg-card);
    border: 1px solid #333;
    border-radius: 6px;
    outline: none;
    aria-label: "打开导航菜单";
}

#menuToggle .menu-text {
    display: none; /* 隐藏文字，只保留图标 */
}

#menuToggle span {
    display: block;
    width: 24px;
    height: 3px;
    background: var(--text-main);
    margin: 0;
    border-radius: 1px;
    transition: all 0.3s cubic-bezier(0.77, 0.2, 0.05, 1.0);
}

/* 移动端样式 */
@media (max-width: 900px) {
    :root { --site-max-width: 100%; }
    
    #menuToggle {
        display: flex;
    }
    
    /* 隐藏PC端元素 */
    #nav-menu-desktop, #search {
        display: none !important;
    }
    
    /* 移动端菜单 */
    #nav-menu-mobile {
        display: flex;
        flex-direction: column;
        position: fixed;
        top: 0;
        right: 0;
        width: 85%;
        max-width: 320px;
        height: 100vh;
        background: var(--bg-card);
        padding: 55px 20px 20px !important; /* 紧凑顶部空间 */
        margin: 0 !important;
        z-index: 9996;
        box-shadow: -5px 0 20px rgba(0,0,0,0.4);
        transform: translateX(100%);
        transition: transform 0.3s ease-out;
        pointer-events: none;
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
    }
    
    /* 菜单打开状态 */
    #nav-menu-mobile.show {
        transform: translateX(0);
        pointer-events: auto;
    }
    
    /* 移除菜单所有符号和装饰 */
    #nav-menu-mobile li {
        list-style: none !important;
        margin: 0 !important;
        padding: 0 !important;
    }
    
    #nav-menu-mobile li::before,
    #nav-menu-mobile li::after {
        display: none !important;
    }
    
    /* 菜单项样式 */
    #nav-menu-mobile a {
        padding: 12px 15px;
        margin-bottom: 6px; /* 减少间距 */
        font-size: 1.1em;
        border-radius: var(--border-radius);
    }
    
    /* 菜单按钮激活状态（变为×） */
    #menuToggle.active span:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
        background: var(--accent);
    }
    #menuToggle.active span:nth-child(2) {
        opacity: 0;
    }
    #menuToggle.active span:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
        background: var(--accent);
    }
    
    /* 遮罩层 */
    .menu-overlay {
        content: '';
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0,0,0,0.2);
        z-index: 9995;
        backdrop-filter: blur(2px);
        display: none;
    }
    
    /* 菜单打开时显示遮罩 */
    html.menu-open .menu-overlay {
        display: block;
    }
    
    /* 隐藏移动端侧边栏 */
    #secondary, .sidebar, .widget-area,
    #secondary *, .sidebar *, .widget-area * {
        display: none !important;
        visibility: hidden !important;
        width: 0 !important;
        height: 0 !important;
        overflow: hidden !important;
        margin: 0 !important;
        padding: 0 !important;
    }
    
    /* 其他移动端样式 */
    #main {
        width: 100% !important;
        max-width: 100% !important;
        padding: 0 10px !important;
        margin: 0 auto !important;
        float: none !important;
    }
    
    .page-navigator { padding: 0 5px !important; margin: 40px 0 !important; }
    .page-navigator li:nth-child(n+4):not(:last-child) { display: none !important; }
    .page-navigator li:nth-child(4):not(:last-child) ~ li:last-child { position: relative !important; }
    .page-navigator li:nth-child(4):not(:last-child) ~ li:last-child::before {
        content: "..." !important;
        position: absolute !important;
        left: -25px !important;
        color: var(--text-light) !important;
    }
    
    body, html, .container, .header-container, #footer .container, .friendlinks, #header > div, #body > div, #footer > div, .row {
        width: 100% !important;
        max-width: 100% !important;
        min-width: 0 !important;
        padding-left: 10px !important;
        padding-right: 10px !important;
        box-sizing: border-box !important;
    }
    
    #logo, .description { text-align: center !important; }
    .row { margin: 10px 0 20px !important; padding: 0 !important; }
    .post { padding: 15px !important; margin-bottom: 15px !important; }
    .post-title { font-size: 1.4em !important; text-align: center !important; }
    .post-near { flex-direction: column !important; gap: 15px !important; }
    .friendlinks h3, .friendlinks ul { margin-left: 0 !important; text-align: center !important; justify-content: center !important; }
    * { overflow-x: hidden !important; }
}

/* 无障碍焦点样式 */
#menuToggle:focus {
    outline: 3px solid var(--accent);
    outline-offset: 2px;
}

/* 主体内容与侧边栏布局修复 */
#body .container {
    width: 100%;
    padding: 0 20px;
    box-sizing: border-box;
}

.row {
    display: flex;
    flex-wrap: nowrap; /* 禁止换行 */
    margin: 15px auto 30px;
    padding: 0;
    width: 100%;
    box-sizing: border-box;
}

#main {
    width: 65%; /* 主内容宽度，预留间距 */
    float: left;
    padding-right: 2%; /* 百分比间距，避免溢出 */
    box-sizing: border-box; /* 确保padding不增加总宽度 */
    padding-top: 0;
    margin-top: 0;
}

#secondary {
    width: 33%; /* 侧边栏宽度，总和65%+2%+33%=100% */
    float: right;
    padding-left: 0;
    box-sizing: border-box;
    padding-top: 0;
    margin-top: 0 !important;
}

/* 中等屏幕适配（901px-1200px） */
@media (min-width: 901px) and (max-width: 1200px) {
    #main { width: 60%; }
    #secondary { width: 38%; }
}

/* 清除浮动 */
.row::after {
    content: "";
    display: table;
    clear: both;
}

/* 文章样式 */
.post {
    background: var(--bg-card);
    padding: 25px;
    margin-bottom: 25px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    transition: all 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    margin-left: 0;
    margin-right: 0;
}

.post:hover { animation: bounceUp 0.6s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards; filter: brightness(1.05); }
.post-title { margin: 0 0 15px; font-size: 1.6em; color: var(--text-main); }
.post-title a { color: var(--text-main); }
.post-title a:hover { color: var(--accent); transform: translateX(3px); display: inline-block; transition: transform 0.3s ease; }

.post-meta {
    color: var(--text-light);
    margin: 0 0 20px;
    padding: 0;
    font-size: 0.9em;
}

.post-meta li {
    display: inline-block;
    margin: 0 10px 0 0;
    padding-left: 12px;
    border-left: 1px solid #444;
}

.post-meta li:first-child { padding-left: 0; border-left: none; }
.post-content { line-height: 1.8; font-size: 15px; }
.post-content img, .post-content video, .post-content audio { max-width: 100%; border-radius: var(--border-radius); margin: 15px 0; }

.tags { margin-top: 20px; }
.tags a {
    display: inline-block;
    background: var(--bg-hover);
    color: var(--text-light);
    padding: 4px 10px;
    border-radius: 4px;
    margin: 0 5px 8px 0;
    font-size: 0.9em;
}

.tags a:hover { background: var(--accent); color: white; }

.post-near {
    list-style: none;
    padding: 0;
    margin: 30px 0;
    display: flex;
    justify-content: space-between;
}

.post-near li {
    background: var(--bg-card);
    padding: 10px 15px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
}

/* 分页样式 */
.page-navigator {
    list-style: none;
    padding: 0;
    margin: 60px 0;
    text-align: center;
    display: flex;
    justify-content: center;
    flex-wrap: nowrap;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.page-navigator::-webkit-scrollbar { display: none; }
.page-navigator li { display: inline-block; margin: 0 4px; flex-shrink: 0; }
.page-navigator a {
    display: inline-block;
    padding: 10px 16px;
    background: var(--bg-card);
    border-radius: var(--border-radius);
    transition: var(--transition);
    font-size: 16px;
    min-width: 36px;
}

.page-navigator a:hover, .page-navigator .current a { background: var(--accent); color: white; }

/* 评论区样式 */
#comments {
    background: var(--bg-card);
    padding: 25px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    margin-top: 30px;
}

.comment-list { list-style: none; padding: 0; }
.comment-list li {
    background: var(--bg-hover);
    padding: 15px;
    margin-bottom: 15px;
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.comment-list li:hover { transform: translateX(5px); }
.comment-author { display: flex; align-items: center; margin-bottom: 10px; }
.comment-author .avatar { width: 40px; height: 40px; border-radius: 50%; margin-right: 10px; }
.comment-meta { color: var(--text-light); font-size: 0.9em; }
.comment-reply { text-align: right; margin-top: 10px; }

#comment-form input, #comment-form textarea {
    background: var(--bg-hover);
    border: 1px solid #444;
    color: var(--text-main);
    padding: 10px;
    border-radius: var(--border-radius);
    margin-bottom: 15px;
    transition: var(--transition);
}

#comment-form input:focus, #comment-form textarea:focus {
    border-color: var(--accent);
    outline: none;
    box-shadow: 0 0 0 2px rgba(77, 166, 255, 0.2);
}

button, .submit {
    background: var(--accent);
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    font-weight: 500;
}

button:hover, .submit:hover {
    background: var(--accent-dark);
    transform: scale(1.05);
    box-shadow: 0 4px 12px rgba(77, 166, 255, 0.3);
}

/* 侧边栏样式 */
.widget {
    background: var(--bg-card);
    padding: 20px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    margin-bottom: 25px;
}

.widget-title {
    margin-top: 0;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--accent);
    color: var(--accent-light);
}

.widget-list { list-style: none; padding: 0; }
.widget-list li { margin: 10px 0; }
.widget-list li a { color: var(--text-light); transition: var(--transition); }
.widget-list li a:hover { color: var(--accent); padding-left: 5px; }

/* 友情链接样式 */
.friendlinks {
    margin: 15px auto;
    padding: 15px;
    background: var(--bg-card);
    border-radius: var(--border-radius);
    width: 100% !important;
    max-width: var(--site-max-width) !important;
}

.friendlinks h3 {
    margin-top: 0;
    color: var(--accent);
    border-bottom: 1px solid var(--accent);
    padding-bottom: 8px;
    font-size: 1.2em;
    text-align: left;
    margin-left: 15px;
}

.friendlinks ul {
    list-style: none;
    padding: 0;
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin: 10px 0 0 15px;
    justify-content: flex-start;
}

.friendlinks a {
    display: inline-block;
    padding: 5px 10px;
    background: var(--bg-hover);
    border-radius: 4px;
    transition: var(--transition);
}

.friendlinks a:hover {
    background: var(--accent);
    color: white;
    transform: translateY(-2px);
}

/* 页脚样式 */
.records {
    margin: 10px 0;
    text-align: center;
    color: var(--text-light);
    font-size: 0.9em;
}

.records a { color: var(--text-light); margin: 0 5px; }
.records a:hover { color: var(--accent); }
.copyright { margin: 15px 0; text-align: center; font-size: 0.9em; }

#footer {
    padding: 30px 0;
    text-align: center;
    color: var(--text-light);
    border-top: 1px solid #333;
    margin-top: 30px;
    width: 100%;
    box-sizing: border-box;
}

/* 错误页面样式 */
.error-page {
    background: var(--bg-card);
    padding: 50px;
    margin: 50px auto;
    text-align: center;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    max-width: 800px;
}

.error-code {
    font-size: 80px;
    font-weight: bold;
    color: var(--accent);
    margin-bottom: 20px;
    text-shadow: 0 0 15px rgba(77, 166, 255, 0.3);
}

.error-desc {
    margin: 20px 0;
    color: var(--text-light);
    font-size: 1.1em;
    line-height: 1.8;
}

.error-search { max-width: 500px; margin: 30px auto 20px; }
.error-search .text {
    background: var(--bg-hover);
    border: 1px solid #444;
    color: var(--text-main);
    padding: 12px 16px;
    border-radius: var(--border-radius);
    width: 100%;
    font-size: 15px;
    margin-bottom: 15px;
}

.error-actions { margin-top: 20px; }
.error-actions .submit { padding: 12px 30px; font-size: 1.1em; }

/* 无障碍辅助样式 */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* 焦点样式增强 */
a:focus, button:focus, input:focus, textarea:focus {
    outline: 3px solid var(--accent);
    outline-offset: 2px;
}