/* ============================================================
   Lithos 地质主题 — 完整暗色样式
   ============================================================ */

/* --- 基础重置 --- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{overflow-x:hidden}

.lithos-body{
    font-family:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
    background:#0a0a0a;
    color:rgba(255,255,255,0.85);
    line-height:1.65;
    -webkit-font-smoothing:antialiased;
}

/* 首页 Hero 占满全屏，不显示内页导航 */
.lithos-front .lithos-site-header{display:none}
.lithos-front .lithos-main{padding:0}

/* --- 无障碍跳转 --- */
.lithos-skip-link{position:absolute;left:-9999px;top:0;z-index:99999;background:#e8702a;color:#fff;padding:8px 16px;font-size:14px;text-decoration:none;border-radius:0 0 8px 0}
.lithos-skip-link:focus{left:0}
.screen-reader-text{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(1px,1px,1px,1px);white-space:nowrap}

/* --- 容器 --- */
.lithos-container{max-width:1200px;margin:0 auto;padding:0 20px}
.lithos-header-container{max-width:1280px;margin:0 auto;padding:0 20px;display:flex;align-items:center;justify-content:space-between;height:64px}

/* ============================================================
   顶部导航栏（内页）
   ============================================================ */
.lithos-site-header{
    position:sticky;top:0;z-index:1000;
    background:rgba(10,10,10,0.92);backdrop-filter:blur(16px);
    border-bottom:1px solid rgba(255,255,255,0.06);
}

/* Logo */
.lithos-header-brand{flex-shrink:0}
.lithos-brand-link{display:flex;align-items:center;gap:10px;text-decoration:none;transition:opacity 0.2s}
.lithos-brand-link:hover{opacity:0.85}
.lithos-brand-text{font-family:'Playfair Display',serif;font-style:italic;font-size:20px;color:#fff;white-space:nowrap}

/* 桌面导航 */
.lithos-primary-nav{display:none}
@media(min-width:768px){.lithos-primary-nav{display:block}}
.lithos-nav-list{list-style:none;display:flex;align-items:center;gap:2px;margin:0;padding:0}
.lithos-nav-list li{position:relative}
.lithos-nav-link{
    display:inline-flex;align-items:center;padding:8px 16px;
    color:rgba(255,255,255,0.75);font-size:14px;font-weight:500;
    text-decoration:none;border-radius:8px;transition:all 0.2s;
}
.lithos-nav-link:hover,.lithos-nav-list .current-menu-item>.lithos-nav-link{
    color:#fff;background:rgba(255,255,255,0.08);
}
/* 子菜单 */
.lithos-nav-list .sub-menu{
    display:none;position:absolute;top:100%;left:0;min-width:180px;
    background:#1a1a2e;border:1px solid rgba(255,255,255,0.1);
    border-radius:10px;padding:6px;list-style:none;z-index:100;
    box-shadow:0 12px 40px rgba(0,0,0,0.4);
}
.lithos-nav-list li:hover>.sub-menu{display:block}
.lithos-nav-list .sub-menu .lithos-nav-link{padding:8px 14px;font-size:13px;display:block;border-radius:6px}

/* 右侧操作 */
.lithos-header-actions{display:flex;align-items:center;gap:4px;flex-shrink:0}
.lithos-search-toggle{
    background:none;border:none;color:rgba(255,255,255,0.7);cursor:pointer;
    padding:8px;border-radius:8px;transition:all 0.2s;
}
.lithos-search-toggle:hover{color:#fff;background:rgba(255,255,255,0.08)}
.lithos-search-dropdown{display:none;padding:8px 0 16px;border-top:1px solid rgba(255,255,255,0.06)}
.lithos-search-dropdown.active{display:block}

/* 汉堡菜单 */
.lithos-mobile-toggle{
    display:flex;align-items:center;justify-content:center;
    width:40px;height:40px;background:none;border:none;cursor:pointer;
    border-radius:8px;transition:background 0.2s;
}
.lithos-mobile-toggle:hover{background:rgba(255,255,255,0.08)}
@media(min-width:768px){.lithos-mobile-toggle{display:none}}
.lithos-hamburger,.lithos-hamburger::before,.lithos-hamburger::after{
    display:block;width:20px;height:2px;background:#fff;border-radius:1px;
    transition:all 0.3s;position:relative;
}
.lithos-hamburger::before,.lithos-hamburger::after{content:'';position:absolute;left:0}
.lithos-hamburger::before{top:-6px}.lithos-hamburger::after{top:6px}
.lithos-mobile-toggle.active .lithos-hamburger{background:transparent}
.lithos-mobile-toggle.active .lithos-hamburger::before{top:0;transform:rotate(45deg)}
.lithos-mobile-toggle.active .lithos-hamburger::after{top:0;transform:rotate(-45deg)}

/* 移动端菜单面板 */
.lithos-mobile-menu{
    display:none;padding:8px 20px 20px;
    border-top:1px solid rgba(255,255,255,0.06);
    background:rgba(10,10,10,0.98);
}
.lithos-mobile-menu.active{display:block}
.lithos-mobile-nav-list{list-style:none;padding:0;margin:0}
.lithos-mobile-nav-list li{border-bottom:1px solid rgba(255,255,255,0.05)}
.lithos-mobile-nav-list a{
    display:block;padding:14px 0;color:rgba(255,255,255,0.8);
    font-size:15px;text-decoration:none;transition:color 0.2s;
}
.lithos-mobile-nav-list a:hover,.lithos-mobile-nav-list .current-menu-item>a{color:#e8702a}
.lithos-mobile-nav-list .sub-menu{padding-left:16px;list-style:none;border-top:1px solid rgba(255,255,255,0.04)}
.lithos-mobile-nav-list .sub-menu a{font-size:13px;color:rgba(255,255,255,0.6)}

/* ============================================================
   内页布局
   ============================================================ */
.lithos-content-layout{display:flex;gap:40px}
.lithos-content-main{flex:1;min-width:0}
.lithos-sidebar{width:300px;flex-shrink:0}
@media(max-width:1024px){
    .lithos-content-layout{flex-direction:column}
    .lithos-sidebar{width:100%}
}

/* ============================================================
   侧边栏小工具
   ============================================================ */
.lithos-widget{
    background:rgba(255,255,255,0.03);border:1px solid rgba(255,255,255,0.06);
    border-radius:12px;padding:20px;margin-bottom:20px;
}
.lithos-widget-title{
    font-size:14px;font-weight:600;color:#fff;margin-bottom:14px;
    padding-bottom:10px;border-bottom:1px solid rgba(255,255,255,0.08);
    text-transform:uppercase;letter-spacing:0.05em;
}
.lithos-widget ul{list-style:none;padding:0;margin:0}
.lithos-widget ul li{padding:6px 0;border-bottom:1px solid rgba(255,255,255,0.04)}
.lithos-widget ul li:last-child{border-bottom:none}
.lithos-widget a{color:rgba(255,255,255,0.7);text-decoration:none;font-size:14px;transition:color 0.2s}
.lithos-widget a:hover{color:#e8702a}
/* 搜索 */
.lithos-widget .lithos-search-form{display:flex}
.lithos-widget .lithos-search-field{flex:1;background:rgba(255,255,255,0.06);border:1px solid rgba(255,255,255,0.1);color:#fff;padding:10px 14px;border-radius:8px 0 0 8px;font-size:14px}
.lithos-widget .lithos-search-field:focus{outline:none;border-color:#e8702a}
.lithos-widget .lithos-search-submit{background:#e8702a;border:none;color:#fff;padding:0 16px;border-radius:0 8px 8px 0;cursor:pointer}

/* ============================================================
   面包屑
   ============================================================ */
.lithos-breadcrumbs{display:flex;align-items:center;gap:8px;font-size:13px;color:rgba(255,255,255,0.4);margin-bottom:32px;flex-wrap:wrap}
.lithos-breadcrumbs a{color:rgba(255,255,255,0.5);text-decoration:none;transition:color 0.2s}
.lithos-breadcrumbs a:hover{color:#e8702a}
.lithos-breadcrumb-sep{color:rgba(255,255,255,0.2)}
.lithos-breadcrumb-current{color:rgba(255,255,255,0.7)}

/* ============================================================
   排版（内页文章）
   ============================================================ */
.lithos-prose{line-height:1.8}
.lithos-prose h2{font-size:1.75rem;color:#fff;margin-top:2em;margin-bottom:0.5em;line-height:1.3}
.lithos-prose h3{font-size:1.35rem;color:#fff;margin-top:1.5em;margin-bottom:0.5em;line-height:1.35}
.lithos-prose h4{font-size:1.15rem;color:#fff;margin-top:1.25em;margin-bottom:0.4em}
.lithos-prose p{margin-bottom:1.2em}
.lithos-prose a{color:#e8702a;text-decoration:underline;text-underline-offset:3px}
.lithos-prose a:hover{color:#f09050}
.lithos-prose img{max-width:100%;height:auto;border-radius:12px;margin:1.5em 0}
.lithos-prose figure{margin:1.5em 0}
.lithos-prose figcaption{font-size:13px;color:rgba(255,255,255,0.4);text-align:center;margin-top:8px}
.lithos-prose blockquote{border-left:3px solid #e8702a;padding:12px 24px;margin:1.5em 0;color:rgba(255,255,255,0.6);font-style:italic;background:rgba(232,112,42,0.05);border-radius:0 8px 8px 0}
.lithos-prose ul,.lithos-prose ol{padding-left:24px;margin-bottom:1.2em}
.lithos-prose li{margin-bottom:6px}
.lithos-prose code{background:rgba(255,255,255,0.08);padding:2px 8px;border-radius:4px;font-size:0.9em;font-family:"SF Mono",Monaco,monospace}
.lithos-prose pre{background:rgba(255,255,255,0.04);border:1px solid rgba(255,255,255,0.08);border-radius:10px;padding:16px 20px;overflow-x:auto;margin:1.5em 0}
.lithos-prose pre code{background:none;padding:0}
.lithos-prose hr{border:none;border-top:1px solid rgba(255,255,255,0.08);margin:2em 0}
.lithos-prose table{width:100%;border-collapse:collapse;margin:1.5em 0;font-size:14px}
.lithos-prose th,.lithos-prose td{padding:10px 14px;border:1px solid rgba(255,255,255,0.1);text-align:left}
.lithos-prose th{background:rgba(255,255,255,0.04);font-weight:600;color:#fff}

/* --- 文章卡片 --- */
.lithos-post-card a{text-decoration:none;color:inherit}

/* --- 标签 --- */
.lithos-tag{display:inline-block;padding:3px 12px;background:rgba(255,255,255,0.06);color:rgba(255,255,255,0.6);border-radius:20px;font-size:12px;text-decoration:none;margin:2px 4px 2px 0;transition:all 0.2s}
.lithos-tag:hover{background:rgba(232,112,42,0.15);color:#e8702a}

/* --- 上一篇/下一篇 --- */
.lithos-post-nav a{color:rgba(255,255,255,0.6);text-decoration:none;font-size:14px;transition:color 0.2s;max-width:45%}
.lithos-post-nav a:hover{color:#e8702a}

/* ============================================================
   评论
   ============================================================ */
.lithos-comments{margin-top:0}
.lithos-comments-title{font-size:20px;color:#fff;margin-bottom:24px}
.lithos-comment-list{list-style:none;padding:0;margin:0}
.lithos-comment-list .comment{padding:20px 0;border-bottom:1px solid rgba(255,255,255,0.06)}
.lithos-comment-list .comment-body{display:flex;gap:16px}
.lithos-comment-list .comment-author img{border-radius:50%}
.lithos-comment-list .comment-author .fn{font-weight:600;color:#fff;font-size:14px;font-style:normal}
.lithos-comment-list .comment-metadata{font-size:12px;color:rgba(255,255,255,0.35);margin-top:2px}
.lithos-comment-list .comment-metadata a{color:inherit;text-decoration:none}
.lithos-comment-list .comment-content{margin-top:10px;font-size:14px;line-height:1.7}
.lithos-comment-list .comment-content p{margin-bottom:8px}
.lithos-comment-list .reply{margin-top:8px}
.lithos-comment-list .reply a{font-size:12px;color:#e8702a;text-decoration:none;font-weight:500}
.lithos-comment-list .children{list-style:none;padding-left:40px;margin-top:10px}
.lithos-comment-pagination{margin-top:24px;display:flex;gap:12px}
.lithos-comment-pagination a,.lithos-comment-pagination span{font-size:13px;color:rgba(255,255,255,0.6)}
.lithos-comments-closed{color:rgba(255,255,255,0.3);font-size:14px;margin-top:16px;font-style:italic}

/* 评论表单 */
.lithos-comment-reply-title{font-size:18px;color:#fff;margin-bottom:16px}
.lithos-comment-notes{font-size:13px;color:rgba(255,255,255,0.4);margin-bottom:16px}
.lithos-comments label{display:block;font-size:13px;color:rgba(255,255,255,0.6);margin-bottom:4px}
.lithos-comments input[type="text"],.lithos-comments input[type="email"],.lithos-comments input[type="url"],.lithos-comments textarea{
    width:100%;background:rgba(255,255,255,0.05);border:1px solid rgba(255,255,255,0.1);
    color:#fff;padding:10px 14px;border-radius:8px;font-size:14px;margin-bottom:14px;
    transition:border-color 0.2s;font-family:inherit;
}
.lithos-comments textarea{min-height:120px;resize:vertical}
.lithos-comments input:focus,.lithos-comments textarea:focus{outline:none;border-color:#e8702a}
.lithos-btn-submit{background:#e8702a;color:#fff;border:none;padding:12px 28px;border-radius:8px;font-size:15px;font-weight:600;cursor:pointer;transition:all 0.2s}
.lithos-btn-submit:hover{background:#d2611f;transform:translateY(-1px)}

/* ============================================================
   搜索表单
   ============================================================ */
.lithos-search-form{display:flex;max-width:480px}
.lithos-search-field{flex:1;background:rgba(255,255,255,0.06);border:1px solid rgba(255,255,255,0.1);color:#fff;padding:12px 16px;border-radius:10px 0 0 10px;font-size:15px;font-family:inherit}
.lithos-search-field::placeholder{color:rgba(255,255,255,0.3)}
.lithos-search-field:focus{outline:none;border-color:#e8702a}
.lithos-search-submit{background:#e8702a;border:none;color:#fff;padding:0 20px;border-radius:0 10px 10px 0;cursor:pointer;transition:background 0.2s}
.lithos-search-submit:hover{background:#d2611f}

/* ============================================================
   分页
   ============================================================ */
.lithos-pagination ul{list-style:none;display:inline-flex;gap:4px;padding:0;margin:0}
.lithos-pagination .page-numbers{
    display:inline-flex;align-items:center;justify-content:center;
    min-width:40px;height:40px;border-radius:8px;
    background:rgba(255,255,255,0.05);color:rgba(255,255,255,0.6);
    font-size:14px;text-decoration:none;transition:all 0.2s;
}
.lithos-pagination .page-numbers:hover{background:rgba(255,255,255,0.1);color:#fff}
.lithos-pagination .current{background:#e8702a;color:#fff}

/* ============================================================
   页脚
   ============================================================ */
.lithos-site-footer{background:#0a0a0a;border-top:1px solid rgba(255,255,255,0.06)}
.lithos-footer-widgets{padding:60px 0 40px}
.lithos-footer-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:32px}
@media(max-width:768px){.lithos-footer-grid{grid-template-columns:1fr}}
.lithos-footer-widget-title{font-size:13px;font-weight:600;color:#fff;text-transform:uppercase;letter-spacing:0.06em;margin-bottom:16px}
.lithos-footer-widget{color:rgba(255,255,255,0.5);font-size:14px;line-height:1.7}
.lithos-footer-widget a{color:rgba(255,255,255,0.5);text-decoration:none;transition:color 0.2s}
.lithos-footer-widget a:hover{color:#e8702a}
.lithos-footer-widget ul{list-style:none;padding:0;margin:0}
.lithos-footer-widget ul li{padding:4px 0}
.lithos-footer-desc{margin-top:8px}
.lithos-footer-bottom{padding:20px 0;border-top:1px solid rgba(255,255,255,0.04)}
.lithos-footer-bottom-inner{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px}
.lithos-copyright{font-size:13px;color:rgba(255,255,255,0.3);margin:0}
.lithos-footer-nav-list{list-style:none;display:flex;gap:16px;margin:0;padding:0;flex-wrap:wrap}
.lithos-footer-nav-list a{font-size:13px;color:rgba(255,255,255,0.4);text-decoration:none;transition:color 0.2s}
.lithos-footer-nav-list a:hover{color:#e8702a}
.lithos-credit{font-size:12px;color:rgba(255,255,255,0.2);margin:0}
.lithos-credit a{color:rgba(255,255,255,0.3);text-decoration:none}
@media(max-width:768px){.lithos-footer-bottom-inner{flex-direction:column;text-align:center}}

/* ============================================================
   首页隐藏内页元素
   ============================================================ */
.lithos-front .lithos-site-footer{display:none}

/* ============================================================
   Playfair Display 工具类
   ============================================================ */
.font-playfair{font-family:'Playfair Display',serif}