:root {
            --kmnh1y-primary: #EE4D2D;
            --kmnh1y-secondary: #FF8C00;
            --kmnh1y-text-dark: #222222;
            --kmnh1y-text-light: #666666;
            --kmnh1y-bg-gray: #F8F9FA;
            --kmnh1y-white: #FFFFFF;
            --kmnh1y-shadow: 0 10px 30px rgba(0,0,0,0.08);
            --kmnh1y-radius: 16px;
            --kmnh1y-transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
        }

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

        body {
            font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
            color: var(--kmnh1y-text-dark);
            line-height: 1.8;
            background-color: var(--kmnh1y-white);
            word-break: break-word;
            overflow-x: hidden;
        }

        /* Layout Helpers */
        .kmnh1y-container {
            max-width: 1100px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .kmnh1y-flex {
            display: flex;
            flex-wrap: wrap;
        }

        .kmnh1y-flex > * {
            min-width: 0;
        }

        /* Navigation */
        .kmnh1y-nav {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 80px;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(15px);
            z-index: 1000;
            border-bottom: 1px solid rgba(0,0,0,0.05);
        }

        .kmnh1y-nav-content {
            height: 100%;
            justify-content: space-between;
            align-items: center;
        }

        .kmnh1y-logo {
            flex: 0 0 auto;
        }

        .kmnh1y-logo img {
            height: 40px;
            display: block;
        }

        .kmnh1y-menu {
            list-style: none;
            gap: 24px;
            align-items: center;
        }

        .kmnh1y-menu a {
            text-decoration: none;
            color: var(--kmnh1y-text-dark);
            font-weight: 500;
            font-size: 15px;
            transition: var(--kmnh1y-transition);
        }

        .kmnh1y-menu a:hover {
            color: var(--kmnh1y-primary);
        }

        /* Hero Section - Unique Diagonal Split */
        .kmnh1y-hero {
            padding: 160px 0 100px;
            background: linear-gradient(135deg, #FFF5F2 0%, #FFFFFF 100%);
            position: relative;
            overflow: hidden;
        }

        .kmnh1y-hero::before {
            content: "";
            position: absolute;
            top: -10%;
            right: -10%;
            width: 40%;
            height: 80%;
            background: radial-gradient(circle, rgba(238,77,45,0.05) 0%, transparent 70%);
            z-index: 0;
        }

        .kmnh1y-hero-grid {
            align-items: center;
            gap: 48px;
        }

        .kmnh1y-hero-text {
            flex: 1 1 500px;
            z-index: 1;
        }

        .kmnh1y-hero-title {
            font-size: clamp(2.2rem, 4vw + 1rem, 3.5rem);
            line-height: 1.2;
            margin-bottom: 24px;
            background: linear-gradient(90deg, #222, var(--kmnh1y-primary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            word-break: keep-all;
        }

        .kmnh1y-hero-subtitle {
            font-size: clamp(1rem, 1.5vw + 0.5rem, 1.25rem);
            color: var(--kmnh1y-text-light);
            margin-bottom: 40px;
            max-width: 600px;
        }

        .kmnh1y-hero-badge {
            display: inline-block;
            padding: 6px 16px;
            background: rgba(238,77,45,0.1);
            color: var(--kmnh1y-primary);
            border-radius: 50px;
            font-weight: bold;
            font-size: 14px;
            margin-bottom: 16px;
        }

        /* Feature Highlight / Step Guide */
        .kmnh1y-guide {
            padding: 80px 0;
            background: var(--kmnh1y-white);
        }

        .kmnh1y-section-title {
            text-align: center;
            margin-bottom: 64px;
        }

        .kmnh1y-section-title h2 {
            font-size: clamp(1.8rem, 3vw, 2.5rem);
            margin-bottom: 16px;
        }

        .kmnh1y-step-card {
            flex: 1 1 300px;
            padding: 40px;
            background: var(--kmnh1y-bg-gray);
            border-radius: var(--kmnh1y-radius);
            margin: 12px;
            transition: var(--kmnh1y-transition);
            border: 1px solid transparent;
            position: relative;
        }

        .kmnh1y-step-card:hover {
            background: var(--kmnh1y-white);
            box-shadow: var(--kmnh1y-shadow);
            transform: translateY(-8px);
            border-color: rgba(238,77,45,0.1);
        }

        .kmnh1y-step-num {
            font-size: 48px;
            font-weight: 900;
            color: rgba(238,77,45,0.1);
            position: absolute;
            top: 20px;
            right: 30px;
        }

        .kmnh1y-step-card h3 {
            font-size: 22px;
            margin-bottom: 16px;
            color: var(--kmnh1y-primary);
        }

        .kmnh1y-shortcut {
            display: inline-block;
            padding: 4px 10px;
            background: #333;
            color: #fff;
            border-radius: 6px;
            font-family: monospace;
            margin: 0 4px;
            box-shadow: 2px 2px 0 var(--kmnh1y-primary);
        }

        /* Versions Hub */
        .kmnh1y-versions {
            padding: 100px 0;
            background: #111;
            color: #fff;
        }

        .kmnh1y-version-grid {
            gap: 24px;
        }

        .kmnh1y-version-card {
            flex: 1 1 320px;
            background: rgba(255,255,255,0.05);
            padding: 48px;
            border-radius: var(--kmnh1y-radius);
            border: 1px solid rgba(255,255,255,0.1);
            transition: var(--kmnh1y-transition);
        }

        .kmnh1y-version-card:hover {
            background: rgba(255,255,255,0.08);
            border-color: var(--kmnh1y-primary);
        }

        .kmnh1y-v-tag {
            color: var(--kmnh1y-primary);
            font-size: 14px;
            text-transform: uppercase;
            letter-spacing: 2px;
            margin-bottom: 12px;
            display: block;
        }

        .kmnh1y-v-title {
            font-size: 28px;
            margin-bottom: 24px;
        }

        .kmnh1y-v-list {
            list-style: none;
            margin-bottom: 32px;
        }

        .kmnh1y-v-list li {
            margin-bottom: 12px;
            color: #aaa;
            font-size: 15px;
            padding-left: 20px;
            position: relative;
        }

        .kmnh1y-v-list li::before {
            content: "✓";
            position: absolute;
            left: 0;
            color: var(--kmnh1y-primary);
        }

        .kmnh1y-btn {
            display: inline-block;
            padding: 14px 32px;
            background: var(--kmnh1y-primary);
            color: #fff;
            text-decoration: none;
            border-radius: 50px;
            font-weight: bold;
            transition: var(--kmnh1y-transition);
            text-align: center;
        }

        .kmnh1y-btn:hover {
            background: var(--kmnh1y-secondary);
            transform: scale(1.05);
            box-shadow: 0 5px 15px rgba(238,77,45,0.4);
        }

        /* FAQ Section */
        .kmnh1y-faq {
            padding: 100px 0;
            background: var(--kmnh1y-bg-gray);
        }

        .kmnh1y-faq-item {
            background: var(--kmnh1y-white);
            padding: 32px;
            border-radius: var(--kmnh1y-radius);
            margin-bottom: 20px;
            box-shadow: 0 4px 6px rgba(0,0,0,0.02);
        }

        .kmnh1y-faq-q {
            font-size: 18px;
            font-weight: bold;
            margin-bottom: 12px;
            color: var(--kmnh1y-primary);
        }

        .kmnh1y-faq-a {
            color: var(--kmnh1y-text-light);
            font-size: 16px;
        }

        /* Footer */
        .kmnh1y-footer {
            background: #fdfdfd;
            padding: 80px 0 40px;
            border-top: 1px solid #eee;
        }

        .kmnh1y-footer-grid {
            justify-content: space-between;
            gap: 40px;
            margin-bottom: 60px;
        }

        .kmnh1y-footer-brand {
            flex: 1 1 300px;
        }

        .kmnh1y-brand-name {
            font-size: 24px;
            font-weight: 900;
            color: var(--kmnh1y-primary);
            margin-bottom: 16px;
        }

        .kmnh1y-footer-links {
            flex: 2 1 600px;
            justify-content: space-around;
        }

        .kmnh1y-link-col h4 {
            margin-bottom: 24px;
            font-size: 16px;
        }

        .kmnh1y-link-col ul {
            list-style: none;
        }

        .kmnh1y-link-col ul li {
            margin-bottom: 12px;
        }

        .kmnh1y-link-col a {
            text-decoration: none;
            color: var(--kmnh1y-text-light);
            font-size: 14px;
            transition: var(--kmnh1y-transition);
        }

        .kmnh1y-link-col a:hover {
            color: var(--kmnh1y-primary);
        }

        .kmnh1y-copyright {
            text-align: center;
            padding-top: 40px;
            border-top: 1px solid #eee;
            color: #999;
            font-size: 13px;
        }

        /* Responsive */
        @media (max-width: 768px) {
            .kmnh1y-menu {
                display: none;
            }
            .kmnh1y-hero {
                padding: 120px 0 60px;
                text-align: center;
            }
            .kmnh1y-hero-title {
                font-size: 2.2rem;
            }
            .kmnh1y-flex {
                flex-direction: column;
            }
            .kmnh1y-step-card, .kmnh1y-version-card {
                margin: 10px 0;
            }
        }