/*
Theme Name: WPNews
Theme URI: https://example.com/wpnews
Author: WPNews Team
Author URI: https://example.com
Description: 一款简洁现代的资讯/新闻类 WordPress 主题，采用原生 Customizer 设置，仅保留实用设置项。
Version: 1.2.0
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: wpnews
Tags: news, blog, two-columns, right-sidebar, custom-colors, custom-logo, featured-images
*/

/* ========== CSS 变量（部分会被后台设置覆盖） ========== */
:root {
    --accent: #c9a266;
    --accent-2: #e6c489;
    --bg: #0d1120;
    --card-bg: #141a2e;
    --card-bg-2: #182038;
    --text: #e9ecf4;
    --text-2: #96a0b5;
    --border: rgba(255, 255, 255, 0.08);
    --border-strong: rgba(255, 255, 255, 0.14);
    --shadow-sm: 0 2px 10px rgba(2, 5, 16, 0.35);
    --shadow-md: 0 10px 30px rgba(2, 5, 16, 0.45);
    --shadow-lg: 0 22px 60px rgba(2, 5, 16, 0.55);
    --radius: 14px;
    --radius-sm: 10px;
    --header-h: 64px;
    --container: 1200px;
    --font-size: 15px;
    --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

html.dark {
    --bg: #07080d;
    --card-bg: #10131e;
    --card-bg-2: #141826;
    --text: #e6e9f1;
    --text-2: #8d97ac;
    --border: rgba(255, 255, 255, 0.07);
    --border-strong: rgba(255, 255, 255, 0.12);
}

/* ========== 基础 ========== */
* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: var(--font-body);
    font-size: var(--font-size);
    line-height: 1.7;
    color: var(--text);
    background-color: var(--bg);
    background-image:
        radial-gradient(1100px 520px at 85% -8%, rgba(201, 162, 102, 0.09), transparent 62%),
        radial-gradient(900px 480px at -8% 26%, rgba(72, 102, 190, 0.11), transparent 58%),
        radial-gradient(760px 420px at 50% 110%, rgba(201, 162, 102, 0.05), transparent 60%),
        linear-gradient(180deg, #0e1322 0%, #0c101c 52%, #0b0e18 100%);
    background-attachment: fixed;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
    transition: background-color .25s, color .25s;
}

a { color: var(--accent-2); text-decoration: none; transition: color .18s ease; }
a:hover { color: var(--accent); }

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

::selection { background: rgba(201, 162, 102, 0.35); color: #fff; }

/* 精致滚动条 */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(255, 255, 255, 0.12); border-radius: 8px; border: 2px solid transparent; background-clip: padding-box; }
::-webkit-scrollbar-thumb:hover { background: rgba(201, 162, 102, 0.45); border: 2px solid transparent; background-clip: padding-box; }

.container { max-width: var(--container); margin: 0 auto; padding: 0 16px; }

.screen-reader-text {
    position: absolute !important;
    width: 1px; height: 1px;
    overflow: hidden;
    clip: rect(1px, 1px, 1px, 1px);
    clip-path: inset(50%);
    white-space: nowrap;
}

/* ========== 顶部栏 ========== */
.topbar {
    background: linear-gradient(90deg, #080b14 0%, #0b0f1c 50%, #080b14 100%);
    color: var(--text-2);
    font-size: 12.5px;
    line-height: 36px;
    letter-spacing: 0.4px;
    border-bottom: 1px solid rgba(201, 162, 102, 0.18);
    box-shadow: 0 1px 0 rgba(255, 255, 255, 0.03);
}
.topbar .container { display: flex; justify-content: space-between; }
.topbar a { color: #c6ccd8; margin-left: 14px; transition: color .18s ease; }
.topbar a:hover { color: var(--accent-2); }

/* ========== 页头 ========== */
.site-header {
    background: color-mix(in srgb, var(--card-bg) 88%, transparent);
    -webkit-backdrop-filter: blur(14px) saturate(1.4);
    backdrop-filter: blur(14px) saturate(1.4);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 99;
}
.site-header.no-sticky { position: static; }

.site-header .container { display: flex; align-items: center; gap: 24px; height: var(--header-h); }

.site-logo { display: flex; align-items: center; font-size: 22px; font-weight: 700; color: var(--text); letter-spacing: 0.5px; }
.site-logo a { color: var(--text); }
.site-logo a:hover { color: var(--accent-2); }
.site-logo img { max-height: 40px; width: auto; }

/* 主导航 */
.main-nav { margin-left: auto; }
.main-nav > ul { display: flex; gap: 4px; list-style: none; margin: 0; padding: 0; }
.main-nav a {
    display: block;
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    color: var(--text);
    font-weight: 500;
    transition: color .18s ease, background .18s ease;
}
.main-nav > ul > li > a:hover { color: var(--accent-2); background: color-mix(in srgb, var(--accent) 10%, transparent); }
.main-nav .current-menu-item > a,
.main-nav .current_page_item > a {
    color: var(--accent-2);
    background: color-mix(in srgb, var(--accent) 14%, transparent);
    box-shadow: inset 0 -2px 0 var(--accent);
}

/* 下拉子菜单：默认隐藏，悬停/键盘聚焦时展开到父级菜单下方 */
.main-nav li { position: relative; }
.main-nav ul ul {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 160px;
    flex-direction: column;
    gap: 0;
    margin: 0;
    padding: 8px;
    list-style: none;
    background: linear-gradient(165deg, var(--card-bg-2) 0%, var(--card-bg) 100%);
    border: 1px solid var(--border-strong);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    z-index: 100;
}
.main-nav ul ul li { width: 100%; }
.main-nav ul ul a { padding: 8px 12px; white-space: nowrap; border-radius: 8px; }
.main-nav ul ul a:hover { color: var(--accent-2); background: color-mix(in srgb, var(--accent) 12%, transparent); }
.main-nav li:hover > ul,
.main-nav li:focus-within > ul { display: flex; }

/* 多级子菜单向右展开 */
.main-nav ul ul ul { top: 0; left: 100%; }

/* 二级菜单项小箭头提示 */
.main-nav .menu-item-has-children > a::after {
    content: "▾";
    margin-left: 6px;
    font-size: 11px;
    color: var(--text-2);
}

.header-actions { display: flex; align-items: center; gap: 10px; }
.search-toggle, .dark-toggle {
    border: 1px solid var(--border-strong);
    background: color-mix(in srgb, var(--card-bg-2) 70%, transparent);
    color: var(--text);
    width: 36px; height: 36px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 15px;
    line-height: 1;
    transition: color .18s ease, border-color .18s ease, box-shadow .18s ease, background .18s ease;
}
.search-toggle:hover, .dark-toggle:hover {
    border-color: var(--accent);
    color: var(--accent-2);
    background: color-mix(in srgb, var(--accent) 12%, transparent);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 12%, transparent);
}

.header-search { display: none; padding: 12px 0; border-bottom: 1px solid var(--border); background: color-mix(in srgb, var(--card-bg) 92%, transparent); }
.header-search.open { display: block; }
.header-search form { display: flex; gap: 8px; }
.header-search input[type="search"] {
    flex: 1;
    padding: 10px 14px;
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-sm);
    background: color-mix(in srgb, var(--bg) 60%, transparent);
    color: var(--text);
    transition: border-color .18s ease, box-shadow .18s ease;
}
.header-search input[type="search"]:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 16%, transparent);
}

/* 移动端菜单按钮 */
.menu-toggle { display: none; }

/* ========== 布局 ========== */
.site-main { padding: 24px 0 48px; }
.layout { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 24px; }
.layout.no-sidebar { grid-template-columns: 1fr; }
.layout.sidebar-left { grid-template-columns: 300px minmax(0, 1fr); }
.layout.sidebar-left .content-area { order: 2; }
.layout.sidebar-left .widget-area { order: 1; }

.page-title {
    font-size: 20px;
    font-weight: 700;
    letter-spacing: 0.3px;
    margin: 0 0 16px;
    padding-left: 14px;
    border-left: 4px solid var(--accent);
    background: linear-gradient(90deg, color-mix(in srgb, var(--accent) 8%, transparent), transparent 70%);
    border-radius: 0 6px 6px 0;
    padding-top: 4px;
    padding-bottom: 4px;
}

/* ========== 精选区（首页） ========== */
.hero-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr; grid-auto-rows: 190px; gap: 14px; margin-bottom: 24px; }
.hero-card {
    position: relative;
    border-radius: var(--radius);
    overflow: hidden;
    background: #0a0d16;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-md);
    transition: box-shadow .25s ease, border-color .25s ease;
}
.hero-card:hover { border-color: color-mix(in srgb, var(--accent) 45%, transparent); box-shadow: var(--shadow-lg); }
.hero-card:nth-child(1) { grid-row: span 2; }
.hero-card img { width: 100%; height: 100%; object-fit: cover; display: block; opacity: .85; transition: transform .5s cubic-bezier(.22,.61,.36,1), opacity .3s; }
.hero-card:hover img { transform: scale(1.06); opacity: .95; }
.hero-card .hero-title {
    position: absolute;
    left: 0; right: 0; bottom: 0;
    margin: 0;
    padding: 44px 18px 16px;
    font-size: 16px;
    font-weight: 600;
    letter-spacing: 0.2px;
    color: #fff;
    text-shadow: 0 1px 8px rgba(0, 0, 0, 0.55);
    background: linear-gradient(180deg, transparent 0%, rgba(7, 9, 16, 0.55) 42%, rgba(7, 9, 16, 0.92) 100%);
}
.hero-card:nth-child(1) .hero-title { font-size: 20px; }

/* 无缩略图推荐卡片：以主题质感渐变兜底 */
.hero-card.no-thumb {
    background:
        radial-gradient(120% 100% at 15% 0%, color-mix(in srgb, var(--accent) 30%, transparent), transparent 60%),
        linear-gradient(160deg, var(--card-bg-2) 0%, var(--card-bg) 100%);
}
.hero-card.no-thumb .hero-title { background: linear-gradient(180deg, transparent 0%, rgba(7, 9, 16, 0.35) 100%); }

/* 推荐数量不足 5 篇时自适应栅格，避免出现空洞 */
.hero-grid.hero-count-1 { grid-template-columns: 1fr; }
.hero-grid.hero-count-2 { grid-template-columns: 1fr 1fr; }
.hero-grid.hero-count-1 .hero-card:nth-child(1),
.hero-grid.hero-count-2 .hero-card:nth-child(1),
.hero-grid.hero-count-3 .hero-card:nth-child(1) { grid-row: span 1; }
.hero-grid.hero-count-3 { grid-template-columns: 1fr 1fr 1fr; }
.hero-grid.hero-count-4 { grid-template-columns: 1.6fr 1fr; grid-auto-rows: 130px; }
.hero-grid.hero-count-4 .hero-card:nth-child(1) { grid-row: span 3; }

/* ========== 文章列表 ========== */
.post-list { display: flex; flex-direction: column; gap: 14px; }
.post-card {
    display: flex;
    gap: 16px;
    background: linear-gradient(160deg, var(--card-bg-2) 0%, var(--card-bg) 100%);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px;
    box-shadow: var(--shadow-sm);
    transition: box-shadow .25s ease, transform .25s ease, border-color .25s ease;
}
.post-card:hover {
    transform: translateY(-3px);
    border-color: color-mix(in srgb, var(--accent) 38%, transparent);
    box-shadow: var(--shadow-md), 0 0 0 1px color-mix(in srgb, var(--accent) 12%, transparent);
}
.post-card .card-thumb { flex: 0 0 200px; }
.post-card .card-thumb img {
    width: 200px; height: 130px;
    object-fit: cover;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    transition: transform .35s ease;
}
.post-card:hover .card-thumb img { transform: scale(1.02); }
.post-card .card-body { min-width: 0; }
.post-card h2 { font-size: 17px; margin: 0 0 8px; line-height: 1.4; letter-spacing: 0.2px; }
.post-card h2 a { color: var(--text); transition: color .18s ease; }
.post-card h2 a:hover { color: var(--accent-2); }
.post-card .card-excerpt { margin: 0 0 10px; color: var(--text-2); font-size: 13.5px; display: -webkit-box; -webkit-line-clamp: 2; line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.post-card.no-thumb .card-body { flex: 1; }

.entry-meta { font-size: 12.5px; color: var(--text-2); display: flex; flex-wrap: wrap; gap: 14px; }
.entry-meta a { color: var(--text-2); transition: color .18s ease; }
.entry-meta a:hover { color: var(--accent-2); }

.cat-tag {
    display: inline-block;
    padding: 3px 12px;
    margin-right: 8px;
    border-radius: 999px;
    background: color-mix(in srgb, var(--accent) 16%, transparent);
    border: 1px solid color-mix(in srgb, var(--accent) 30%, transparent);
    color: var(--accent-2);
    font-size: 12px;
    letter-spacing: 0.3px;
    transition: background .18s ease, border-color .18s ease;
}
a.cat-tag:hover { background: color-mix(in srgb, var(--accent) 26%, transparent); border-color: var(--accent); color: var(--accent-2); }

/* ========== 分页 ========== */
.pagination { display: flex; gap: 8px; margin-top: 28px; }
.pagination .page-numbers {
    min-width: 36px; height: 36px;
    display: inline-flex; align-items: center; justify-content: center;
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-sm);
    background: linear-gradient(160deg, var(--card-bg-2), var(--card-bg));
    color: var(--text);
    padding: 0 10px;
    box-shadow: var(--shadow-sm);
    transition: color .18s ease, border-color .18s ease, box-shadow .18s ease;
}
.pagination .page-numbers:hover {
    color: var(--accent-2);
    border-color: var(--accent);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 14%, transparent);
}
.pagination .page-numbers.current {
    background: linear-gradient(135deg, var(--accent-2), var(--accent));
    border-color: transparent;
    color: #1b1408;
    font-weight: 700;
    box-shadow: 0 6px 18px color-mix(in srgb, var(--accent) 35%, transparent);
}

/* ========== 侧栏 ========== */
.widget-area .widget {
    background: linear-gradient(165deg, var(--card-bg-2) 0%, var(--card-bg) 100%);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 18px;
    margin-bottom: 16px;
    box-shadow: var(--shadow-sm);
}
.widget-title {
    font-size: 15px;
    font-weight: 700;
    letter-spacing: 0.3px;
    margin: 0 0 14px;
    padding-left: 12px;
    border-left: 3px solid var(--accent);
    color: var(--text);
}
.widget ul { list-style: none; margin: 0; padding: 0; }
.widget ul li { padding: 7px 0; border-bottom: 1px dashed var(--border); transition: padding-left .18s ease; }
.widget ul li:last-child { border-bottom: 0; }
.widget ul li a { color: var(--text-2); transition: color .18s ease; }
.widget ul li a:hover { color: var(--accent-2); }

/* ========== 文章页 ========== */
.single-card {
    background: linear-gradient(165deg, var(--card-bg-2) 0%, var(--card-bg) 100%);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px;
    box-shadow: var(--shadow-md);
}
.entry-header .entry-title { font-size: 26px; font-weight: 700; line-height: 1.4; letter-spacing: 0.3px; margin: 10px 0 14px; }
.entry-content { font-size: 16px; }
.entry-content h2, .entry-content h3 { line-height: 1.4; letter-spacing: 0.3px; }
.entry-content h2 { padding-bottom: 8px; border-bottom: 1px solid var(--border); }
.entry-content blockquote {
    margin: 18px 0; padding: 12px 18px;
    border-left: 3px solid var(--accent);
    background: color-mix(in srgb, var(--accent) 7%, transparent);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    color: var(--text);
    font-style: italic;
}
.entry-content pre {
    background: linear-gradient(180deg, #14161d, #0e1016);
    color: #dfe4ee;
    padding: 16px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    box-shadow: inset 0 1px 6px rgba(0, 0, 0, 0.35);
    overflow: auto;
}
.entry-content code { background: rgba(201, 162, 102, 0.14); color: var(--accent-2); padding: 2px 7px; border-radius: 5px; font-size: 0.92em; }
.entry-content pre code { background: transparent; color: inherit; padding: 0; }
.entry-content img { border-radius: var(--radius-sm); }
.entry-content table { border-collapse: collapse; width: 100%; border-radius: var(--radius-sm); overflow: hidden; }
.entry-content th { background: color-mix(in srgb, var(--accent) 12%, transparent); font-weight: 600; }
.entry-content th, .entry-content td { border: 1px solid var(--border); padding: 9px 12px; }

.entry-footer { margin-top: 22px; padding-top: 16px; border-top: 1px solid var(--border); font-size: 13px; color: var(--text-2); }
.entry-footer .tags a {
    margin-right: 8px;
    margin-bottom: 6px;
    display: inline-block;
    padding: 2px 10px;
    border-radius: 999px;
    border: 1px solid var(--border-strong);
    color: var(--text-2);
    transition: color .18s ease, border-color .18s ease;
}
.entry-footer .tags a:hover { color: var(--accent-2); border-color: var(--accent); }

/* 作者信息 */
.author-box {
    display: flex; gap: 14px; margin-top: 20px; padding: 18px;
    border-radius: var(--radius);
    background: linear-gradient(160deg, color-mix(in srgb, var(--accent) 6%, var(--bg)), var(--bg));
    border: 1px solid var(--border);
}
.author-box img { border-radius: 50%; border: 2px solid color-mix(in srgb, var(--accent) 55%, transparent); }
.author-box .author-name { font-weight: 600; margin: 0 0 4px; }
.author-box p { margin: 0; font-size: 13px; color: var(--text-2); }

/* 上下篇导航 */
.post-navigation { display: flex; gap: 12px; margin-top: 20px; }
.post-navigation a {
    flex: 1; padding: 14px 16px;
    background: linear-gradient(160deg, var(--card-bg-2), var(--card-bg));
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text); font-size: 13.5px;
    box-shadow: var(--shadow-sm);
    transition: border-color .18s ease, box-shadow .18s ease, color .18s ease;
}
.post-navigation a:hover {
    border-color: color-mix(in srgb, var(--accent) 45%, transparent);
    color: var(--accent-2);
    box-shadow: var(--shadow-md), 0 0 0 1px color-mix(in srgb, var(--accent) 14%, transparent);
}
.post-navigation .nav-next { text-align: right; }

/* ========== 评论 ========== */
.comments-area, .comments-area-wrap {
    margin-top: 24px;
    background: linear-gradient(165deg, var(--card-bg-2) 0%, var(--card-bg) 100%);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow-sm);
}
.comments-title { font-size: 17px; letter-spacing: 0.3px; }
.comment-list { list-style: none; margin: 0; padding: 0; }
.comment-list .comment { padding: 14px 0; border-bottom: 1px solid var(--border); }
.comment-list .comment:last-child { border-bottom: 0; }
.comment-list .children { list-style: none; padding-left: 40px; }
.comment-meta { display: flex; justify-content: space-between; font-size: 12.5px; color: var(--text-2); margin-bottom: 6px; }
.comment-form label { display: block; font-size: 13px; margin-bottom: 4px; color: var(--text-2); }
.comment-form input[type="text"], .comment-form input[type="email"], .comment-form input[type="url"], .comment-form textarea {
    width: 100%; padding: 10px 13px; margin-bottom: 14px;
    border: 1px solid var(--border-strong); border-radius: var(--radius-sm);
    background: color-mix(in srgb, var(--bg) 62%, transparent);
    color: var(--text);
    font-family: inherit; font-size: 14px;
    transition: border-color .18s ease, box-shadow .18s ease;
}
.comment-form input:focus, .comment-form textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 16%, transparent);
}
.comment-form .submit, .btn-primary {
    background: linear-gradient(135deg, var(--accent-2) 0%, var(--accent) 100%);
    color: #1b1408; border: 0;
    padding: 10px 26px; border-radius: 999px;
    cursor: pointer; font-size: 14px; font-weight: 700; letter-spacing: 0.5px;
    box-shadow: 0 6px 18px color-mix(in srgb, var(--accent) 32%, transparent);
    transition: box-shadow .2s ease, transform .2s ease, filter .2s ease;
}
.comment-form .submit:hover, .btn-primary:hover {
    filter: brightness(1.06);
    transform: translateY(-1px);
    box-shadow: 0 10px 24px color-mix(in srgb, var(--accent) 42%, transparent);
}

/* ========== 页脚 ========== */
.site-footer {
    background:
        radial-gradient(800px 300px at 50% 0%, rgba(201, 162, 102, 0.06), transparent 65%),
        linear-gradient(180deg, #0a0d17 0%, #070910 100%);
    color: var(--text-2);
    margin-top: 24px;
    border-top: 1px solid rgba(201, 162, 102, 0.22);
}
.footer-widgets { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 24px; padding: 40px 0 24px; }
.site-footer .widget-title { color: var(--text); border-color: var(--accent); }
.site-footer a { color: #aab2c2; transition: color .18s ease; }
.site-footer a:hover { color: var(--accent-2); }
.site-footer ul { list-style: none; margin: 0; padding: 0; }
.site-footer ul li { padding: 4px 0; }
.footer-bottom { border-top: 1px solid rgba(255, 255, 255, 0.07); padding: 16px 0; font-size: 13px; text-align: center; letter-spacing: 0.4px; }
.footer-bottom .icp-number { display: block; margin-top: 6px; font-size: 12.5px; }
.footer-bottom .icp-number a { color: #8a93a5; transition: color .18s ease; }
.footer-bottom .icp-number a:hover { color: var(--accent-2); }

/* ========== 广告位 ========== */
.wpnews-ad-slot { margin: 22px auto; text-align: center; max-width: var(--container); padding: 0 16px; overflow: hidden; }
.wpnews-ad-slot:not(:empty) { border: 1px solid var(--border); border-radius: var(--radius); background: linear-gradient(165deg, var(--card-bg-2) 0%, var(--card-bg) 100%); padding: 10px 16px; box-shadow: var(--shadow-sm); }
.wpnews-ad-slot img, .wpnews-ad-slot iframe { max-width: 100%; border-radius: 6px; }

/* ========== 返回顶部 ========== */
.back-to-top {
    position: fixed; right: 20px; bottom: 30px;
    width: 42px; height: 42px;
    border: 0; border-radius: 50%;
    background: linear-gradient(135deg, var(--accent-2), var(--accent)); color: #1b1408;
    cursor: pointer; display: none;
    box-shadow: 0 8px 22px color-mix(in srgb, var(--accent) 40%, transparent), inset 0 1px 0 rgba(255, 255, 255, 0.35);
    font-size: 16px; font-weight: 700;
    transition: transform .2s ease, box-shadow .2s ease;
}
.back-to-top.show { display: block; }
.back-to-top:hover { transform: translateY(-3px); box-shadow: 0 12px 28px color-mix(in srgb, var(--accent) 55%, transparent); }

/* ========== 无内容 ========== */
.no-results {
    background: linear-gradient(165deg, var(--card-bg-2) 0%, var(--card-bg) 100%);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 48px 24px;
    text-align: center;
    box-shadow: var(--shadow-md);
}
.no-results .search-form { margin-top: 16px; display: flex; gap: 8px; justify-content: center; }
.no-results .search-form input[type="search"] {
    padding: 10px 14px; border: 1px solid var(--border-strong);
    border-radius: var(--radius-sm);
    background: color-mix(in srgb, var(--bg) 62%, transparent);
    color: var(--text);
    transition: border-color .18s ease, box-shadow .18s ease;
}
.no-results .search-form input[type="search"]:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 16%, transparent);
}

/* ========== 推荐阅读 ========== */
.recommended-posts {
    margin-top: 20px;
    background: linear-gradient(165deg, var(--card-bg-2) 0%, var(--card-bg) 100%);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px 22px;
    box-shadow: var(--shadow-sm);
}
.recommended-title {
    font-size: 15px;
    font-weight: 700;
    letter-spacing: 0.3px;
    margin: 0 0 14px;
    padding-left: 12px;
    border-left: 3px solid var(--accent);
    color: var(--text);
}
.recommended-list { list-style: none; counter-reset: rec; margin: 0; padding: 0; }
.recommended-list li {
    counter-increment: rec;
    padding: 0 0 0 34px;
    position: relative;
    border-bottom: 1px dashed var(--border);
}
.recommended-list li:last-child { border-bottom: 0; }
.recommended-list li::before {
    content: counter(rec, decimal-leading-zero);
    position: absolute;
    left: 0; top: 9px;
    font-size: 12px;
    font-weight: 700;
    color: var(--accent-2);
    background: color-mix(in srgb, var(--accent) 14%, transparent);
    border: 1px solid color-mix(in srgb, var(--accent) 30%, transparent);
    border-radius: 6px;
    line-height: 1;
    padding: 3px 5px;
    transition: background .18s ease, border-color .18s ease;
}
.recommended-list li:hover::before {
    background: color-mix(in srgb, var(--accent) 28%, transparent);
    border-color: var(--accent);
}
.recommended-list a {
    display: block;
    padding: 8px 0;
    color: var(--text);
    font-size: 14.5px;
    line-height: 1.6;
    transition: color .18s ease, padding-left .18s ease;
}
.recommended-list a:hover { color: var(--accent-2); padding-left: 4px; }

/* ========== 友情链接（仅首页） ========== */
.blogroll-links {
    margin-top: 20px;
    background: linear-gradient(165deg, var(--card-bg-2) 0%, var(--card-bg) 100%);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px 22px;
    box-shadow: var(--shadow-sm);
}
.blogroll-title {
    font-size: 15px;
    font-weight: 700;
    letter-spacing: 0.3px;
    margin: 0 0 14px;
    padding-left: 12px;
    border-left: 3px solid var(--accent);
    color: var(--text);
}
.blogroll-list { list-style: none; display: flex; flex-wrap: wrap; gap: 10px; margin: 0; padding: 0; }
.blogroll-list a {
    display: inline-block;
    padding: 5px 14px;
    border: 1px solid var(--border-strong);
    border-radius: 999px;
    color: var(--text-2);
    font-size: 13px;
    transition: color .18s ease, border-color .18s ease, background .18s ease;
}
.blogroll-list a:hover {
    color: var(--accent-2);
    border-color: var(--accent);
    background: color-mix(in srgb, var(--accent) 10%, transparent);
}

/* ========== 键盘可达性 ========== */
a:focus-visible, button:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
    border-radius: 4px;
}

/* ========== 响应式 ========== */
@media (max-width: 991px) {
    .layout { grid-template-columns: 1fr; }
    .layout.sidebar-left .content-area, .layout.sidebar-left .widget-area { order: initial; }
    .hero-grid { grid-template-columns: 1fr 1fr; grid-auto-rows: 150px; }
    .hero-card:nth-child(1) { grid-row: span 1; grid-column: span 2; }
    .hero-grid.hero-count-4 { grid-template-columns: 1fr 1fr; grid-auto-rows: 150px; }
    .hero-grid.hero-count-4 .hero-card:nth-child(1) { grid-row: span 1; grid-column: span 2; }
    .hero-grid.hero-count-3 { grid-template-columns: 1fr 1fr; }
    .hero-grid.hero-count-3 .hero-card:nth-child(1) { grid-column: span 2; }
}

@media (max-width: 767px) {
    .topbar .container span.date { display: none; }
    .menu-toggle {
        display: block;
        border: 1px solid var(--border-strong); background: color-mix(in srgb, var(--card-bg-2) 70%, transparent); color: var(--text);
        width: 36px; height: 36px; border-radius: var(--radius-sm); cursor: pointer; font-size: 16px;
    }
    .main-nav {
        display: none;
        position: absolute; top: var(--header-h); left: 0; right: 0;
        background: color-mix(in srgb, var(--card-bg) 96%, transparent);
        -webkit-backdrop-filter: blur(14px);
        backdrop-filter: blur(14px);
        border-bottom: 1px solid var(--border-strong);
        padding: 8px 16px 16px;
        box-shadow: var(--shadow-lg);
    }
    .main-nav.open { display: block; }
    .main-nav > ul { flex-direction: column; gap: 0; }

    /* 移动端子菜单：取消下拉定位，直接缩进展示 */
    .main-nav ul ul {
        display: block;
        position: static;
        min-width: 0;
        padding: 0 0 0 16px;
        border: 0;
        box-shadow: none;
        background: transparent;
    }
    .main-nav ul ul a { padding-left: 24px; }
    .main-nav .menu-item-has-children > a::after { content: ""; margin: 0; }
    .site-header .container { gap: 12px; }
    .site-logo { margin-right: auto; font-size: 18px; }
    .hero-grid { grid-template-columns: 1fr; grid-auto-rows: 170px; }
    .hero-card:nth-child(1) { grid-column: span 1; }
    .hero-grid.hero-count-2,
    .hero-grid.hero-count-3,
    .hero-grid.hero-count-4 { grid-template-columns: 1fr; grid-auto-rows: 170px; }
    .hero-grid.hero-count-2 .hero-card:nth-child(1),
    .hero-grid.hero-count-3 .hero-card:nth-child(1),
    .hero-grid.hero-count-4 .hero-card:nth-child(1) { grid-row: span 1; grid-column: span 1; }
    .post-card { flex-direction: column; }
    .post-card .card-thumb img { width: 100%; height: auto; }
    .single-card { padding: 18px; }
    .post-navigation { flex-direction: column; }
    .post-navigation .nav-next { text-align: left; }
}