#help-page, #help-page * { margin: 0; padding: 0; box-sizing: border-box; }
        #help-page {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
            background: #f9fafb;
            color: #374151;
            padding: 20px;
        }
        #help-page .card {
            background: #ffffff;
            border-radius: 12px;
            padding: 20px;
            box-shadow: 0 1px 3px rgba(0,0,0,0.08);
            margin-bottom: 16px;
        }
        #help-page .card h2 {
            font-size: 15px;
            font-weight: 600;
            color: #1f2937;
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        #help-page .card h2 i { color: #3b82f6; }
        /* 使用说明段落（标题 + 正文） */
        #help-page .help-sec { padding: 10px 0; border-bottom: 1px solid #f3f4f6; }
        #help-page .help-sec:last-child { border-bottom: none; }
        #help-page .help-sec-title {
            font-size: 14px;
            font-weight: 600;
            color: #1d4ed8;
            margin-bottom: 6px;
        }
        #help-page .help-sec-body {
            font-size: 13px;
            line-height: 1.8;
            color: #4b5563;
        }
        .dark #help-page .help-sec-title { color: #60a5fa; }
        .dark #help-page .help-sec-body { color: #cbd5e1; }
        .dark #help-page .help-sec { border-bottom-color: #3d3d5c; }
        #help-page .step {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            padding: 12px 0;
            border-bottom: 1px solid #f3f4f6;
        }
        #help-page .step:last-child { border-bottom: none; }
        #help-page .step-num {
            width: 28px;
            height: 28px;
            background: #3b82f6;
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            font-weight: 600;
            flex-shrink: 0;
        }
        #help-page .step-content {
            font-size: 14px;
            line-height: 1.6;
            color: #4b5563;
        }
        #help-page .step-content strong {
            color: #1f2937;
        }
        #help-page .highlight {
            display: inline-block;
            background: #eff6ff;
            color: #3b82f6;
            padding: 2px 8px;
            border-radius: 4px;
            font-size: 13px;
        }
        #help-page .tip {
            margin-top: 12px;
            padding: 12px;
            background: #f0fdf4;
            border-radius: 8px;
            font-size: 13px;
            color: #166534;
            display: flex;
            align-items: flex-start;
            gap: 8px;
        }
        #help-page .tip i { color: #22c55e; margin-top: 2px; }

        .dark #help-page { background: #1a1a2e; color: #d1d5db; }
        .dark #help-page .card { background: #2d2d44; }
        .dark #help-page .card h2 { color: #e5e7eb; }
        .dark #help-page .step-content { color: #9ca3af; }
        .dark #help-page .step-content strong { color: #e5e7eb; }
        .dark #help-page .highlight { background: #1e3a5f; color: #60a5fa; }
        .dark #help-page .tip { background: #1a3a2a; color: #86efac; }