:root {
            --primary-color: #8B4513;
            --secondary-color: #D2691E;
            --accent-color: #228B22;
            --light-color: #F5F5DC;
            --dark-color: #3E2723;
        }
        body {
            font-family: "Noto Serif SC", "Microsoft YaHei", serif;
            line-height: 1.8;
            color: #333;
            overflow-x: hidden;
        }
        .navbar-brand {
            font-weight: 700;
            font-size: 1.8rem;
            color: var(--primary-color) !important;
        }
        .nav-link {
            font-weight: 500;
            color: var(--dark-color) !important;
            transition: all 0.3s;
            margin: 0 5px;
            border-radius: 4px;
        }
        .nav-link:hover {
            color: var(--primary-color) !important;
            background-color: rgba(139, 69, 19, 0.1);
            transform: translateY(-2px);
        }
        .hero-section {
            background: linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7)), 
                        url('https://images.unsplash.com/photo-1561047029-3000c68339ca?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=2070&q=80');
            background-size: cover;
            background-position: center;
            color: white;
            padding: 150px 0;
            text-align: center;
            margin-top: 76px;
        }
        .section-title {
            color: var(--primary-color);
            position: relative;
            padding-bottom: 15px;
            margin-bottom: 40px;
            text-align: center;
            font-weight: 700;
        }
        .section-title:after {
            content: '';
            position: absolute;
            width: 80px;
            height: 4px;
            background-color: var(--secondary-color);
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
        }
        .card-hover {
            transition: transform 0.3s, box-shadow 0.3s;
            border: none;
            border-radius: 10px;
            overflow: hidden;
        }
        .card-hover:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
        }
        .tea-card {
            border-top: 5px solid var(--primary-color);
            height: 100%;
        }
        .btn-tea {
            background-color: var(--primary-color);
            color: white;
            padding: 10px 25px;
            border-radius: 30px;
            transition: all 0.3s;
            border: 2px solid var(--primary-color);
        }
        .btn-tea:hover {
            background-color: transparent;
            color: var(--primary-color);
            transform: translateY(-3px);
        }
        .culture-section {
            background-color: var(--light-color);
            padding: 80px 0;
        }
        .timeline {
            position: relative;
            padding-left: 30px;
        }
        .timeline:before {
            content: '';
            position: absolute;
            left: 0;
            top: 0;
            height: 100%;
            width: 4px;
            background-color: var(--primary-color);
        }
        .timeline-item {
            position: relative;
            margin-bottom: 40px;
        }
        .timeline-item:before {
            content: '';
            position: absolute;
            left: -36px;
            top: 5px;
            width: 16px;
            height: 16px;
            border-radius: 50%;
            background-color: var(--secondary-color);
            border: 3px solid white;
            box-shadow: 0 0 0 3px var(--secondary-color);
        }
        .testimonial-card {
            background-color: white;
            border-radius: 10px;
            padding: 30px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
            border-left: 5px solid var(--accent-color);
        }
        .flink {
            display: inline-block;
            padding: 8px 20px;
            background-color: #f8f9fa;
            border-radius: 30px;
            margin: 5px 8px;
            color: #555;
            text-decoration: none;
            transition: all 0.3s;
            border: 1px solid #e9ecef;
        }
        .flink:hover {
            background-color: var(--primary-color);
            color: white;
            transform: translateY(-3px);
            text-decoration: none;
        }
        footer {
            background-color: var(--dark-color);
            color: #ddd;
        }
        footer a {
            color: #ddd;
            transition: color 0.3s;
        }
        footer a:hover {
            color: white;
            text-decoration: none;
        }
        .social-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background-color: rgba(255, 255, 255, 0.1);
            color: white;
            margin-right: 10px;
            transition: all 0.3s;
        }
        .social-icon:hover {
            background-color: var(--primary-color);
            transform: translateY(-3px);
        }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background-color: var(--primary-color);
            color: white;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: all 0.3s;
            z-index: 999;
            opacity: 0;
            visibility: hidden;
        }
        .back-to-top.active {
            opacity: 1;
            visibility: visible;
        }
        .back-to-top:hover {
            background-color: var(--secondary-color);
            transform: translateY(-5px);
        }
        @media (max-width: 768px) {
            .hero-section {
                padding: 100px 0;
                margin-top: 66px;
            }
            .section-title {
                font-size: 1.8rem;
            }
            .display-4 {
                font-size: 2.5rem;
            }
        }
        .product-img {
            height: 200px;
            object-fit: cover;
            transition: transform 0.5s;
        }
        .card-hover:hover .product-img {
            transform: scale(1.05);
        }
        .contact-info {
            background-color: white;
            padding: 30px;
            border-radius: 10px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
            height: 100%;
        }
        .contact-icon {
            width: 60px;
            height: 60px;
            border-radius: 50%;
            background-color: rgba(139, 69, 19, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary-color);
            font-size: 1.5rem;
            margin-bottom: 20px;
        }