:root {
            --kuarrz-primary: #ff5a00;
            --kuarrz-primary-light: #ff8c4d;
            --kuarrz-dark: #222222;
            --kuarrz-gray: #666666;
            --kuarrz-light: #f4f4f4;
            --kuarrz-white: #ffffff;
            --kuarrz-shadow: 0 10px 30px rgba(0,0,0,0.08);
            --kuarrz-transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
            --kuarrz-container-width: 1100px;
        }

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

        body {
            font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
            line-height: 1.6;
            color: var(--kuarrz-dark);
            background-color: var(--kuarrz-white);
            overflow-x: hidden;
        }

        /* Typography */
        h1, h2, h3 {
            line-height: 1.2;
            word-break: keep-all;
            overflow-wrap: break-word;
            white-space: normal;
        }

        p {
            line-height: 1.8;
            word-break: break-word;
            overflow-wrap: break-word;
        }

        .kuarrz-fluid-h1 { font-size: clamp(2.5rem, 5vw + 1rem, 4rem); font-weight: 800; }
        .kuarrz-fluid-h2 { font-size: clamp(1.8rem, 3vw + 0.5rem, 2.5rem); font-weight: 700; margin-bottom: 24px; }
        .kuarrz-fluid-p { font-size: clamp(1rem, 1vw + 0.5rem, 1.125rem); color: var(--kuarrz-gray); }

        /* Layout Helpers */
        .kuarrz-container {
            max-width: var(--kuarrz-container-width);
            margin: 0 auto;
            padding: 0 24px;
        }

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

        .kuarrz-flex-item {
            min-width: 0;
        }

        .kuarrz-section {
            padding: 96px 0;
        }

        /* Header & Nav */
        .kuarrz-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid rgba(0,0,0,0.05);
            transition: var(--kuarrz-transition);
        }

        .kuarrz-nav-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 72px;
            max-width: var(--kuarrz-container-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        .kuarrz-logo img {
            height: 32px;
            display: block;
        }

        .kuarrz-nav-menu {
            display: flex;
            list-style: none;
            gap: 24px;
        }

        .kuarrz-nav-menu li a {
            text-decoration: none;
            color: var(--kuarrz-dark);
            font-weight: 500;
            font-size: 15px;
            transition: var(--kuarrz-transition);
            position: relative;
        }

        .kuarrz-nav-menu li a:hover,
        .kuarrz-nav-menu li a.kuarrz-active {
            color: var(--kuarrz-primary);
        }

        .kuarrz-nav-menu li a.kuarrz-active::after {
            content: '';
            position: absolute;
            bottom: -8px;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--kuarrz-primary);
        }

        /* Hero Section - Canvas Style */
        .kuarrz-hero {
            padding-top: 160px;
            padding-bottom: 80px;
            background: radial-gradient(circle at 90% 10%, #fff5f0 0%, #ffffff 60%);
            position: relative;
            overflow: hidden;
        }

        .kuarrz-hero-content {
            flex: 1;
            min-width: 300px;
            z-index: 2;
        }

        .kuarrz-hero-visual {
            flex: 1;
            min-width: 300px;
            display: flex;
            justify-content: center;
            align-items: center;
            position: relative;
        }

        .kuarrz-canvas-mockup {
            width: 100%;
            max-width: 500px;
            background: var(--kuarrz-white);
            border-radius: 24px;
            box-shadow: var(--kuarrz-shadow);
            padding: 24px;
            border: 1px solid rgba(0,0,0,0.03);
            transform: rotate(2deg);
            transition: var(--kuarrz-transition);
        }

        .kuarrz-canvas-mockup:hover {
            transform: rotate(0deg) translateY(-10px);
        }

        .kuarrz-ink-trace {
            width: 100%;
            height: 200px;
            background: repeating-linear-gradient(0deg, transparent, transparent 39px, #eee 40px);
            position: relative;
        }

        .kuarrz-ink-trace svg {
            width: 100%;
            height: 100%;
        }

        .kuarrz-btn {
            display: inline-block;
            padding: 16px 48px;
            background: var(--kuarrz-primary);
            color: var(--kuarrz-white);
            border-radius: 50px;
            text-decoration: none;
            font-weight: 600;
            margin-top: 32px;
            transition: var(--kuarrz-transition);
            box-shadow: 0 4px 15px rgba(255, 90, 0, 0.3);
        }

        .kuarrz-btn:hover {
            background: var(--kuarrz-primary-light);
            transform: translateY(-3px);
            box-shadow: 0 8px 25px rgba(255, 90, 0, 0.4);
        }

        /* Feature Grid */
        .kuarrz-features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 32px;
            margin-top: 48px;
        }

        .kuarrz-feature-card {
            background: var(--kuarrz-light);
            padding: 48px;
            border-radius: 20px;
            transition: var(--kuarrz-transition);
            border: 1px solid transparent;
        }

        .kuarrz-feature-card:hover {
            background: var(--kuarrz-white);
            border-color: var(--kuarrz-primary);
            box-shadow: var(--kuarrz-shadow);
            transform: translateY(-5px);
        }

        .kuarrz-feature-icon {
            font-size: 40px;
            margin-bottom: 24px;
            color: var(--kuarrz-primary);
        }

        /* Showcase Section */
        .kuarrz-showcase {
            background: var(--kuarrz-dark);
            color: var(--kuarrz-white);
            border-radius: 40px;
            margin: 0 24px;
            overflow: hidden;
        }

        .kuarrz-showcase-inner {
            display: flex;
            align-items: center;
            padding: 80px;
        }

        .kuarrz-showcase-text {
            flex: 1;
            padding-right: 48px;
        }

        .kuarrz-showcase-img {
            flex: 1.2;
            background: #333;
            border-radius: 16px;
            height: 400px;
            position: relative;
            display: flex;
            justify-content: center;
            align-items: center;
            overflow: hidden;
        }

        .kuarrz-brush-preview {
            font-size: 120px;
            font-family: "Kaiti", serif;
            opacity: 0.8;
        }

        /* Article Section */
        .kuarrz-news-section {
            background-color: #fafafa;
        }

        .kuarrz-article-list {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
            gap: 24px;
        }

        .kuarrz-article-item {
            background: #fff;
            padding: 24px;
            border-bottom: 4px solid transparent;
            transition: var(--kuarrz-transition);
        }

        .kuarrz-article-item:hover {
            border-bottom-color: var(--kuarrz-primary);
        }

        /* Footer */
        .kuarrz-footer {
            background: #f8f9fa;
            padding: 80px 0 40px;
            border-top: 1px solid #eee;
        }

        .kuarrz-footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 48px;
            margin-bottom: 64px;
        }

        .kuarrz-footer-brand h2 {
            font-size: 24px;
            margin-bottom: 16px;
            color: var(--kuarrz-primary);
        }

        .kuarrz-footer-links h4 {
            margin-bottom: 24px;
            font-size: 16px;
        }

        .kuarrz-footer-links ul {
            list-style: none;
        }

        .kuarrz-footer-links ul li {
            margin-bottom: 12px;
        }

        .kuarrz-footer-links ul li a {
            text-decoration: none;
            color: var(--kuarrz-gray);
            transition: var(--kuarrz-transition);
        }

        .kuarrz-footer-links ul li a:hover {
            color: var(--kuarrz-primary);
        }

        .kuarrz-footer-bottom {
            text-align: center;
            padding-top: 40px;
            border-top: 1px solid #eee;
            color: #999;
            font-size: 14px;
        }

        /* Responsive */
        @media (max-width: 768px) {
            .kuarrz-nav-menu {
                display: none; /* In real site, add a hamburger menu */
            }
            .kuarrz-fluid-h1 { font-size: 2.5rem; }
            .kuarrz-section { padding: 64px 0; }
            .kuarrz-showcase-inner {
                flex-direction: column;
                padding: 40px 24px;
            }
            .kuarrz-showcase-text {
                padding-right: 0;
                margin-bottom: 40px;
                text-align: center;
            }
            .kuarrz-showcase-img {
                height: 250px;
                width: 100%;
            }
            .kuarrz-canvas-mockup {
                margin-top: 40px;
                transform: none;
            }
        }