/* ====== 样式保持不变 ====== */
        :root {
            --primary: #2563eb;
            --primary-soft: #eff6ff;
            --text-main: #111827;
            --text-muted: #6b7280;
            --bg-page: #f8fafc;
            --bg-card: #ffffff;
            --border: #e5e7eb;
            --radius: 14px;
            --shadow: 0 10px 30px rgba(15, 23, 42, 0.06);
        }

        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        body {
            font-family: "Microsoft YaHei", Arial, sans-serif;
            background: var(--bg-page);
            color: var(--text-main);
            line-height: 1.8;
        }

        a {
            color: inherit;
            text-decoration: none;
        }

        .container {
            width: min(1160px, calc(100% - 32px));
            margin: 0 auto;
        }

        .site-header {
            background: #ffffff;
            border-bottom: 1px solid var(--border);
        }

        .site-header .container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            padding: 20px 0;
        }

        .site-brand {
            font-size: 28px;
            font-weight: 700;
            color: var(--primary);
        }

        .site-brand span {
            display: block;
            font-size: 12px;
            font-weight: 400;
            color: var(--text-muted);
            margin-top: 5px;
        }

        .site-nav {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
        }

        .site-nav a {
            padding: 9px 14px;
            border-radius: 999px;
            background: #f8fafc;
            font-size: 14px;
        }

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

        .breadcrumb {
            padding: 18px 0;
            color: var(--text-muted);
            font-size: 14px;
        }

        .breadcrumb a {
            color: #374151;
        }

        .layout {
            display: grid;
            grid-template-columns: minmax(0, 2.2fr) minmax(290px, 1fr);
            gap: 22px;
            padding-bottom: 40px;
        }

        .card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
        }

        .article {
            padding: 28px;
        }

        .article h1 {
            font-size: clamp(28px, 4vw, 38px);
            line-height: 1.35;
            margin-bottom: 18px;
        }

        .meta {
            display: flex;
            flex-wrap: wrap;
            gap: 12px 18px;
            color: var(--text-muted);
            font-size: 14px;
            padding-bottom: 18px;
            border-bottom: 1px solid var(--border);
            margin-bottom: 18px;
        }

        .summary {
            background: #f8fafc;
            border: 1px solid var(--border);
            border-radius: 12px;
            padding: 16px 18px;
            color: #374151;
            margin-bottom: 22px;
        }

        .summary strong {
            color: var(--primary);
        }

        .article-body {
            font-size: 17px;
            color: #1f2937;
            word-break: break-word;
        }

        .article-body img {
            max-width: 100%;
            height: auto;
            border-radius: 10px;
            margin: 18px 0;
        }

        .article-body p,
        .article-body ul,
        .article-body ol,
        .article-body h2,
        .article-body h3 {
            margin-bottom: 16px;
        }

        .extend-box {
            margin-top: 28px;
            padding: 22px;
            background: var(--primary-soft);
            border: 1px solid #bfdbfe;
            border-radius: 12px;
        }

        .extend-box h2 {
            font-size: 20px;
            margin-bottom: 10px;
        }

        .extend-box p {
            color: #475569;
            margin-bottom: 14px;
        }

        .extend-links {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 12px;
        }

        .extend-links a {
            display: block;
            background: #fff;
            border: 1px solid #dbeafe;
            border-radius: 10px;
            padding: 14px;
        }

        .extend-links a:hover {
            border-color: #93c5fd;
        }

        .panel {
            padding: 22px;
        }

        .panel + .panel {
            margin-top: 20px;
        }

        .panel-title {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 16px;
        }

        .link-list {
            list-style: none;
        }

        .link-list li + li {
            border-top: 1px dashed var(--border);
        }

        .link-list a {
            display: block;
            padding: 13px 0;
            font-size: 15px;
        }

        .link-list span {
            display: block;
            margin-top: 5px;
            font-size: 12px;
            color: var(--text-muted);
        }

        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        .tag-cloud a {
            padding: 9px 14px;
            border-radius: 999px;
            background: #f8fafc;
            border: 1px solid var(--border);
            font-size: 14px;
        }

        .tag-cloud a:hover {
            color: var(--primary);
            border-color: #bfdbfe;
            background: #eff6ff;
        }

        .footer {
            background: #111827;
            color: #cbd5e1;
            padding: 34px 0 42px;
        }

        .footer p + p {
            margin-top: 10px;
            color: #94a3b8;
            font-size: 14px;
        }

        @media (max-width: 960px) {
            .layout {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 640px) {
            .site-header .container {
                flex-direction: column;
                align-items: flex-start;
            }

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