/* ========== 全局重置与变量 ========== */
        :root {
            --primary-red: #ef443b;
            --text-main: #1f2937;
            --gradient-start: #ef443b;
            --gradient-end: #EE8D3B;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Noto Sans', 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            font-display: swap;
        }
        body {
            color: var(--text-main);
            background: #ffffff;
            line-height: 1.5;
            overflow-x: hidden;
        }

        /* ========== 导航栏（与首页完全一致） ========== */
        nav {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 0 8%;
            height: 80px;
            position: fixed;
            width: 100%;
            top: 0;
            z-index: 1000;
            background: radial-gradient(circle at 10% 20%, rgba(239, 68, 68, 0.03) 0%, rgba(255, 255, 255, 1) 50%);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid #f3f4f6;
        }
        .nav-left { display: flex; align-items: center; }
        .logo { margin-right: 40px; }
        .logo img { height: 30px; width: 158px; }
        .nav-links { display: flex; list-style: none; }
        .nav-links li { display: flex; align-items: center; gap: 4px; margin: 0 15px; border-bottom: 3px solid transparent; }
        .nav-links li:hover { border-bottom: 3px solid #FFD5D6; }
        .nav-links a { text-decoration: none; color: var(--text-main); font-size: 15px; font-weight: 500; }
        .nav-links-svg { width: 12px; height: 12px; }
        .nav-right { display: flex; align-items: center; }
        .btn-link {
            text-decoration: none; color: var(--primary-red); padding: 10px 24px;
            border: 2px solid var(--primary-red); border-radius: 6px; font-weight: 600;
            font-size: 14px; margin-left: 12px; transition: 0.3s;
        }
        .btn-link:hover { background: var(--primary-red); color: #fff; }
        .btn-outline {
            text-decoration: none; color: #fff; background: var(--primary-red);
            padding: 11px 24px; border-radius: 6px; font-weight: 600; font-size: 14px; transition: 0.3s;
        }
        .btn-outline:hover { background: #d93833; }

        /* 主内容区 */
        .guide-wrapper {
            max-width: 1280px; margin: 0 auto; padding: 160px 4% 100px;
            display: flex; gap: 50px;
        }
        .guide-content { flex: 1; max-width: 800px; }
        .guide-header { margin-bottom: 40px; border-bottom: 1px solid #f3f4f6; padding-bottom: 30px; }
        .guide-header h1 {
            font-size: 3rem; line-height: 1.2; font-weight: 800; margin-bottom: 16px;
            background: linear-gradient(135deg, #1f2937, #ef443b);
            -webkit-background-clip: text; background-clip: text; color: transparent;
        }
        .guide-header h1 span { background: linear-gradient(135deg, #ef443b, #EE8D3B); -webkit-background-clip: text; background-clip: text; color: transparent; }
        .guide-meta { font-size: 0.9rem; color: #6b7280; font-weight: 500; display: flex; gap: 20px; flex-wrap: wrap; }
        .badge-trouble { background: #ef443b10; color: #ef443b; padding: 4px 12px; border-radius: 30px; font-weight: 600; font-size: 0.8rem; }

        /* 创意故障分类卡片 */
        .fault-grid {
            display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 24px;
            margin: 40px 0;
        }
        .fault-card {
            background: #fff; border: 1px solid #f0f0f0; border-radius: 24px; padding: 28px 20px;
            transition: 0.3s; text-align: center;
        }
        .fault-card:hover { transform: translateY(-5px); box-shadow: 0 20px 30px rgba(0,0,0,0.03); border-color: #ef443b30; }
        .fault-icon { font-size: 2.5rem; margin-bottom: 15px; }
        .fault-card h3 { font-size: 1.3rem; font-weight: 700; margin-bottom: 12px; color: #1f2937; }
        .fault-card p { font-size: 0.9rem; color: #5a6a85; line-height: 1.5; }

        /* 文章正文 */
        .article-body h2 {
            font-size: 1.8rem; font-weight: 700; margin: 50px 0 20px;
            display: flex; align-items: center; gap: 10px;
        }
        .article-body h2::before { content: ''; width: 5px; height: 28px; background: var(--primary-red); border-radius: 4px; display: inline-block; }
        .article-body h3 { font-size: 1.3rem; font-weight: 700; margin: 30px 0 15px; color: #2c3e4e; }
        .article-body p { font-size: 1.02rem; color: #4b5563; line-height: 1.7; margin-bottom: 20px; }
        .article-body strong { color: #000; font-weight: 700; }

        /* 分步解决方案卡片组 */
        .solution-steps {
            background: #fef9f9; border-radius: 24px; padding: 30px; margin: 40px 0;
        }
        .step-item {
            display: flex; gap: 20px; margin-bottom: 30px; align-items: flex-start;
        }
        .step-num {
            background: var(--primary-red); color: white; width: 40px; height: 40px;
            border-radius: 40px; display: flex; align-items: center; justify-content: center;
            font-weight: 800; font-size: 1.2rem; flex-shrink: 0;
        }
        .step-content h4 { font-size: 1.2rem; font-weight: 700; margin-bottom: 8px; }
        .step-content p { margin-bottom: 0; color: #4b5563; }

        /* 参数优化表格创意 */
        .param-optimize {
            background: #f0f9ff; border-radius: 24px; padding: 30px; margin: 40px 0;
            border-left: 5px solid var(--primary-red);
        }
        .param-table { width: 100%; border-collapse: collapse; margin-top: 20px; }
        .param-table th, .param-table td { padding: 12px; text-align: left; border-bottom: 1px solid #e2e8f0; }
        .param-table th { font-weight: 700; color: #1f2937; background: #eef2ff40; }

        .info-note {
            background: #fff8e7; border-left: 4px solid #f59e0b; padding: 18px 24px;
            border-radius: 12px; margin: 30px 0;
        }

        /* 侧边栏 */
        .guide-sidebar { width: 280px; position: sticky; top: 120px; height: fit-content; }
        .sticky-card {
            background: #f9fafb; border-radius: 20px; padding: 28px; border: 1px solid #f0f0f0;
        }
        .sticky-card h4 { font-size: 1.1rem; font-weight: 800; margin-bottom: 20px; color: var(--primary-red); }
        .sticky-card ul { list-style: none; }
        .sticky-card li { margin-bottom: 14px; }
        .sticky-card a { text-decoration: none; color: #4b5563; font-size: 0.9rem; font-weight: 500; transition: 0.2s; }
        .sticky-card a:hover { color: var(--primary-red); }

        /* 页脚与首页完全一致 */
        footer {
            background: #111111; color: #ffffff; padding: 80px 8% 40px;
        }
        .footer-container {
            display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr 1fr; gap: 40px;
        }
        .footer-logo-section img { height: 35px; margin-bottom: 20px; }
        .footer-logo-section p { color: #999; font-size: 14px; }
        .footer-column h3 {
            color: var(--primary-red); font-size: 1.2rem; font-weight: 700; margin-bottom: 25px;
            position: relative; padding-bottom: 15px;
        }
        .footer-column h3::after {
            content: ''; position: absolute; bottom: 0; left: 0; width: 100%; height: 1px; background: #333;
        }
        .footer-column ul { list-style: none; }
        .footer-column ul li { margin-bottom: 12px; }
        .footer-column ul li a { color: #ccc; text-decoration: none; font-size: 14px; transition: 0.3s; }
        .footer-column ul li a:hover { color: var(--primary-red); }
        .footer-bottom {
            margin-top: 60px; padding-top: 30px; border-top: 1px solid #222;
            display: flex; justify-content: space-between; flex-wrap: wrap; font-size: 12px; color: #666;
        }
        .footer-socials { display: flex; gap: 20px; }
        .footer-socials a { color: #666; text-decoration: none; }
        .footer-socials a:hover { color: #fff; }

        @media (max-width: 1024px) {
            .footer-container { grid-template-columns: 1fr 1fr; }
            .footer-logo-section { grid-column: span 2; text-align: center; margin-bottom: 40px; }
            .guide-wrapper { flex-direction: column; padding-top: 120px; }
            .guide-sidebar { display: none; }
            .guide-header h1 { font-size: 2.2rem; }
        }