:root {
            --primary: #353a8e;
            --accent: #da251d;
            --accent-light: #fef3f2;
            --bg-light: #f7f8fa;
            --bg-white: #ffffff;
            --text-dark: #1a1a1a;
            --text-medium: #4a4a4a;
            --text-light: #6b7280;
            --border: #e0e4e9;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06),0 1px 2px rgba(0,0,0,0.04);
            --shadow-md: 0 4px 16px rgba(0,0,0,0.08),0 2px 6px rgba(0,0,0,0.04);
            --shadow-lg: 0 12px 32px rgba(0,0,0,0.10),0 4px 12px rgba(0,0,0,0.05);
            --radius-sm: 6px;
            --radius: 10px;
            --radius-lg: 16px;
            --transition: 0.25s cubic-bezier(0.4,0,0.2,1);
            --font-stack: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            --page-width: 1650px;
            --whatsapp: #25d366;
            --wechat: #2dc100;
        }

        * { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; font-size: 16px; -webkit-font-smoothing: antialiased; }
        body { font-family: var(--font-stack); background-color: var(--bg-light); color: var(--text-dark); line-height: 1.6; min-height: 100vh; }

        .banner-fullwidth { width: 100%; overflow: hidden; margin-bottom: 32px; }
        .banner-fullwidth img { width: 100%; height: auto; display: block; object-fit: cover; max-height: 580px; }

        .breadcrumb-container { max-width: var(--page-width); margin: 0 auto 20px; padding: 0 20px; }
        .breadcrumb { display: flex; align-items: center; flex-wrap: wrap; gap: 8px; font-size: 0.9rem; color: var(--text-light); }
        .breadcrumb a { color: var(--primary); text-decoration: none; font-weight: 500; transition: color var(--transition); }
        .breadcrumb a:hover { color: var(--accent); text-decoration: underline; }
        .breadcrumb .separator { color: #c0c7cf; user-select: none; font-size: 0.7rem; }
        .breadcrumb .current { color: var(--text-dark); font-weight: 600; }

        .samples-page { max-width: var(--page-width); margin: 0 auto; padding: 0 20px 48px; }

        .page-header { text-align: center; margin-bottom: 40px; }
        .page-header .badge { display: inline-block; background-color: var(--accent-light); color: var(--accent); font-weight: 700; font-size: 0.8rem; letter-spacing: 0.06em; text-transform: uppercase; padding: 6px 16px; border-radius: 50px; margin-bottom: 14px; }
        .page-header h1 { font-size: clamp(1.8rem, 3vw, 2.6rem); font-weight: 800; color: var(--primary); margin-bottom: 10px; letter-spacing: -0.02em; }
        .page-header .subtitle { font-size: 1.05rem; color: var(--text-medium); max-width: 750px; margin: 0 auto; }

        .sample-list { display: flex; flex-direction: column; gap: 28px; margin-bottom: 48px; }

        .sample-card {
            background: var(--bg-white); border-radius: var(--radius-lg); overflow: hidden;
            box-shadow: var(--shadow-sm); border: 1px solid var(--border);
            transition: box-shadow var(--transition), transform var(--transition);
            display: flex; flex-direction: row; align-items: stretch;
        }
        .sample-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); }
        .sample-image { width: 480px; min-height: 300px; object-fit: cover; display: block; background: #f0f2f5; border-right: 1px solid var(--border); flex-shrink: 0; }
        .sample-body { padding: 28px 32px; display: flex; flex-direction: column; flex: 1; }
        .sample-name { font-size: 1.5rem; font-weight: 700; color: #000; margin-bottom: 12px; line-height: 1.3; }
        .sample-desc { font-size: 0.95rem; color: var(--text-medium); line-height: 1.7; margin-bottom: 18px; }
        .sample-mold { font-size: 0.9rem; color: var(--primary); font-weight: 600; margin-bottom: 12px; background: #f0f2f8; padding: 8px 12px; border-radius: var(--radius-sm); display: inline-block; align-self: flex-start; }
        .sample-applications { margin-bottom: 20px; }
        .sample-applications h4 { font-size: 0.9rem; font-weight: 700; color: var(--primary); margin-bottom: 8px; letter-spacing: 0.02em; text-transform: uppercase; }
        .sample-applications ul { list-style: none; padding: 0; display: flex; flex-wrap: wrap; gap: 8px; }
        .sample-applications li { background: var(--bg-light); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 4px 14px; font-size: 0.85rem; color: var(--text-medium); white-space: nowrap; }

        .contact-section {
            width: 100%; background: var(--bg-white); border-radius: var(--radius-lg);
            padding: 40px 40px; box-shadow: var(--shadow-md); border: 1px solid var(--border);
            text-align: center; position: relative; overflow: hidden; margin-bottom: 48px;
        }
        .contact-section::after { content: ''; position: absolute; top: -30px; right: -30px; width: 120px; height: 120px; background: var(--accent-light); border-radius: 50%; opacity: 0.5; z-index: 0; }
        .contact-section h2 { font-size: 1.7rem; font-weight: 800; color: #000; margin-bottom: 6px; position: relative; z-index: 1; }
        .contact-section .section-subtitle { color: var(--text-medium); margin-bottom: 30px; font-size: 0.95rem; position: relative; z-index: 1; }
        .contact-cards { display: flex; justify-content: center; align-items: center; gap: 20px; flex-wrap: wrap; position: relative; z-index: 1; }
        .contact-card {
            background: #fafbfc; border-radius: var(--radius); padding: 18px 24px;
            box-shadow: var(--shadow-sm); border: 1px solid var(--border); text-decoration: none;
            color: var(--text-dark); display: flex; align-items: center; gap: 14px;
            transition: all var(--transition); min-width: 220px; flex: 0 1 auto; cursor: pointer;
        }
        .contact-card:hover { background: #ffffff; box-shadow: var(--shadow-lg); border-color: var(--primary); transform: translateY(-2px); }
        .contact-card .icon-circle { width: 44px; height: 44px; border-radius: 12px; display: flex; align-items: center; justify-content: center; background: var(--primary); color: white; flex-shrink: 0; transition: all var(--transition); }
        .contact-card:hover .icon-circle { background: var(--accent); transform: scale(1.05); }
        .contact-card .icon-circle.whatsapp { background: var(--whatsapp); }
        .contact-card:hover .icon-circle.whatsapp { background: #1fb855; }
        .contact-card .icon-circle.wechat { background: var(--wechat); }
        .contact-card:hover .icon-circle.wechat { background: #25a90e; }
        .contact-card .icon-circle svg { width: 22px; height: 22px; fill: white; }
        .contact-card .info { display: flex; flex-direction: column; }
        .contact-card .label { font-weight: 700; font-size: 0.9rem; color: var(--primary); letter-spacing: 0.02em; }
        .contact-card .value { font-size: 0.85rem; color: var(--text-medium); font-weight: 500; }
        .contact-card .arrow-icon { margin-left: auto; color: var(--text-light); transition: color var(--transition), transform var(--transition); display: flex; align-items: center; }
        .contact-card:hover .arrow-icon { color: var(--accent); transform: translateX(4px); }

        .page-footer-note { text-align: center; margin-top: 48px; font-size: 0.82rem; color: var(--text-light); }
        .page-footer-note a { color: var(--primary); text-decoration: none; font-weight: 500; }
        .page-footer-note a:hover { color: var(--accent); text-decoration: underline; }

        .float-buttons { position: fixed; bottom: 28px; right: 28px; z-index: 999; display: flex; flex-direction: column; gap: 12px; align-items: flex-end; }
        .float-btn { width: 52px; height: 52px; border-radius: 50%; display: flex; align-items: center; justify-content: center; box-shadow: 0 4px 14px rgba(0,0,0,0.2); cursor: pointer; transition: transform 0.2s, box-shadow 0.2s; text-decoration: none; position: relative; background: var(--primary); border: none; padding: 0; }
        .float-btn:hover { transform: scale(1.08); box-shadow: 0 6px 20px rgba(0,0,0,0.3); }
        .float-btn.whatsapp { background: var(--whatsapp); }
        .float-btn.wechat-float { background: var(--wechat); }
        .float-btn.phone-float { background: var(--primary); }
        .float-btn svg { width: 28px; height: 28px; fill: #fff; pointer-events: none; }
        .qr-preview { position: absolute; right: 70px; bottom: 0; background: #ffffff; border-radius: 12px; box-shadow: 0 8px 24px rgba(0,0,0,0.15); padding: 12px; display: flex; flex-direction: column; align-items: center; opacity: 0; visibility: hidden; transform: translateX(10px); transition: opacity 0.2s ease, visibility 0.2s ease, transform 0.2s ease; pointer-events: none; white-space: nowrap; }
        .float-btn:hover .qr-preview { opacity: 1; visibility: visible; transform: translateX(0); }
        .qr-preview img { width: 100px; height: 100px; object-fit: contain; border-radius: 8px; display: block; margin-bottom: 6px; }
        .qr-preview .preview-label { font-size: 0.7rem; font-weight: 600; color: var(--text-medium); letter-spacing: 0.02em; }

        .qr-modal { display: none; position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0,0,0,0.75); z-index: 1001; justify-content: center; align-items: center; }
        .qr-modal.active { display: flex; }
        .qr-modal img { max-width: 90vw; max-height: 80vh; border-radius: 12px; background: #fff; padding: 16px; box-shadow: 0 20px 40px rgba(0,0,0,0.3); }
        .close-qr { position: absolute; top: 20px; right: 30px; font-size: 36px; color: #fff; cursor: pointer; background: none; border: none; }

        @media (max-width: 900px) {
            .sample-card { flex-direction: column; }
            .sample-image { width: 100%; height: 280px; border-right: none; border-bottom: 1px solid var(--border); }
            .sample-body { padding: 24px; }
            .contact-cards { flex-direction: column; align-items: stretch; }
            .contact-card { justify-content: center; }
            .contact-section { padding: 30px 20px; }
            .float-buttons { bottom: 16px; right: 16px; }
            .float-btn { width: 46px; height: 46px; }
            .qr-preview { right: 60px; }
            .qr-preview img { width: 80px; height: 80px; }
        }
        @media (max-width: 768px) { .samples-page { padding: 0 12px 32px; } }