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

        :root {
            --primary-dark: #1A365D;
            --primary-color: #2D5AA0;
            --secondary-color: #C19A6B;
            --accent-color: #A52A2A;
            --accent-light: #CD5C5C;
            --light-color: #F8F5F0;
            --light-secondary: #E8E2D6;
            --dark-color: #2C2416;
            --text-color: #444444;
            --text-light: #666666;
            --border-radius: 12px;
            --border-radius-sm: 6px;
            --shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
            --shadow-light: 0 4px 12px rgba(0, 0, 0, 0.05);
            --shadow-hover: 0 12px 32px rgba(0, 0, 0, 0.12);
            --transition: all 0.3s ease;
            --transition-slow: all 0.5s ease;
        }

        body {
            font-family: 'Noto Serif SC', 'Inter', serif;
            line-height: 1.6;
            color: var(--text-color);
            background-color: var(--light-color);
            overflow-x: hidden;
        }

        h1,
        h2,
        h3,
        h4 {
            font-weight: 700;
            color: var(--dark-color);
            margin-bottom: 1rem;
            line-height: 1.3;
        }

        h1 {
            font-family: 'Ma Shan Zheng', cursive;
            font-size: 2.8rem;
            color: var(--accent-color);
            position: relative;
            display: inline-block;
        }

        h1::after {
            content: "";
            position: absolute;
            bottom: -8px;
            left: 0;
            width: 80px;
            height: 4px;
            background: linear-gradient(90deg, var(--accent-color), var(--secondary-color));
            border-radius: 2px;
        }

        h2 {
            font-size: 2rem;
            color: var(--accent-color);
            position: relative;
            padding-bottom: 0.5rem;
        }

        h2::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 0;
            width: 70px;
            height: 4px;
            background-color: var(--accent-color);
            /* 改为枣红色 */
            border-radius: 2px;
        }

        h3 {
            font-size: 1.5rem;
            color: var(--secondary-color);
        }

        p {
            margin-bottom: 1.2rem;
            font-size: 1.1rem;
        }

        a {
            text-decoration: none;
            color: var(--secondary-color);
            transition: var(--transition);
        }

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

        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, var(--accent-color), #8B1A1A);
            /* 改为枣红色渐变 */
            color: white;
            padding: 14px 32px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 1.1rem;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            box-shadow: var(--shadow-light);
            text-align: center;
            position: relative;
            overflow: hidden;
            z-index: 1;
        }

        .btn::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(135deg, var(--accent-light), var(--secondary-color));
            /* 悬停时变为浅枣红到古铜金 */
            z-index: -1;
            opacity: 0;
            transition: var(--transition);
        }

        .btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 6px 16px rgba(0, 0, 0, 0.12);
            color: white;
        }

        .btn-secondary {
            background: transparent;
            border: 2px solid var(--primary-color);
            color: var(--primary-color);
        }

        .btn-secondary:hover {
            background: var(--primary-color);
            color: white;
        }

        section {
            padding: 80px 0;
        }

        .section-title {
            text-align: center;
            margin-bottom: 3rem;
        }

        .section-title h2 {
            display: inline-block;
        }

        .section-title h2::after {
            left: 50%;
            transform: translateX(-50%);
        }

        header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background-color: rgba(255, 255, 255, 0.95);
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
            padding: 15px 0;
            transition: var(--transition);
        }

        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .logo {
            display: flex;
            align-items: center;
        }

        .logo-icon {
            font-size: 2rem;
            color: var(--primary-color);
            margin-right: 10px;
        }

        .logo-text {
            font-family: 'Ma Shan Zheng', cursive;
            font-size: 1.8rem;
            color: var(--accent-color);
            letter-spacing: 1px;
        }

        .logo-text span {
            color: var(--secondary-color);
        }

        .nav-links {
            display: flex;
            list-style: none;
        }

        .nav-links li {
            margin-left: 30px;
        }

        .nav-links a {
            font-weight: 500;
            font-size: 1.1rem;
            position: relative;
        }

        .nav-links a::after {
            content: "";
            position: absolute;
            bottom: -6px;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--accent-color);
            transition: var(--transition);
        }

        .nav-links a:hover::after {
            width: 100%;
        }

        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--accent-color);
            cursor: pointer;
        }

        .hero {
            padding-top: 150px;
            padding-bottom: 100px;
            background: linear-gradient(135deg, rgba(244, 164, 96, 0.05), rgba(93, 138, 168, 0.05));
            position: relative;
            overflow: hidden;
        }

        .hero::before {
            content: "";
            position: absolute;
            top: 0;
            right: 0;
            width: 300px;
            height: 300px;
            background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><path fill="%23F4A460" opacity="0.1" d="M50,0 C77.614,0 100,22.386 100,50 C100,77.614 77.614,100 50,100 C22.386,100 0,77.614 0,50 C0,22.386 22.386,0 50,0 Z M50,10 C28.402,10 10,28.402 10,50 C10,71.598 28.402,90 50,90 C71.598,90 90,71.598 90,50 C90,28.402 71.598,10 50,10 Z"></path></svg>');
            background-size: contain;
            background-repeat: no-repeat;
            opacity: 0.5;
        }

        .hero-content {
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .hero-text {
            flex: 1;
            max-width: 700px;
        }

        .hero-text h1 {
            font-size: 3.2rem;
            margin-bottom: 1.5rem;
        }

        .hero-text p {
            font-size: 1.3rem;
            color: var(--text-light);
            margin-bottom: 2.5rem;
        }

        .hero-buttons {
            display: flex;
            gap: 20px;
        }

        .hero-image {
            flex: 0.65;
            text-align: center;
        }

        .hero-image img {
            max-width: 100%;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
        }

        .placeholder-image {
            width: 100%;
            height: 255px;
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            border-radius: var(--border-radius);
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 1.2rem;
        }

        .placeholder-image img {
            width: 220px;
        }

        .about {
            background-color: white;
        }

        .about-content {
            display: flex;
            align-items: center;
            gap: 50px;
        }

        .about-text {
            flex: 1;
        }

        .about-image {
            flex: 0.65;
        }

        .features {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 30px;
            margin-top: 40px;
        }

        .feature {
            background-color: var(--light-color);
            padding: 25px;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            transition: var(--transition);
        }

        .feature::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 4px;
            height: 100%;
            background: linear-gradient(to bottom, var(--accent-color), var(--secondary-color));
        }

        .feature:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
        }

        .feature-icon {
            font-size: 2.5rem;
            color: var(--primary-color);
            margin-bottom: 15px;
        }

        .courses {
            background: linear-gradient(135deg, rgba(244, 164, 96, 0.03), rgba(93, 138, 168, 0.03));
        }

        .course-cards {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 30px;
        }

        .course-card {
            background-color: white;
            border-radius: var(--border-radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }

        .course-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 12px 25px rgba(0, 0, 0, 0.12);
        }

        .course-image {
            height: 180px;
            background-color: var(--secondary-color);
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 1.3rem;
            position: relative;
            overflow: hidden;
        }

        .course-image::after {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(to bottom right, rgba(0, 0, 0, 0.2), rgba(0, 0, 0, 0));
        }

        .course-content {
            padding: 25px;
        }

        .course-meta {
            display: flex;
            justify-content: space-between;
            margin-bottom: 15px;
            font-size: 0.9rem;
            color: var(--text-light);
        }

        .course-price {
            font-weight: 700;
            color: var(--accent-color);
            /* 改为枣红色 */
            font-size: 1.8rem;
            margin-bottom: 20px;
        }

        .instructor {
            background-color: white;
        }

        .instructor-profile {
            display: flex;
            align-items: center;
            gap: 40px;
            background-color: var(--light-color);
            border-radius: var(--border-radius);
            padding: 40px;
            box-shadow: var(--shadow);
        }

        .instructor-image {
            flex-shrink: 0;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 1.5rem;
            box-shadow: var(--shadow);
        }

        .instructor-info {
            flex: 1;
        }

        .instructor-quote {
            font-style: italic;
            font-size: 1.2rem;
            color: var(--text-light);
            border-left: 4px solid var(--primary-color);
            padding-left: 20px;
            margin: 20px 0;
        }

        .community {
            background: linear-gradient(135deg, rgba(244, 164, 96, 0.05), rgba(93, 138, 168, 0.05));
        }

        .community-content {
            display: flex;
            align-items: center;
            gap: 50px;
        }

        .community-text {
            flex: 1;
        }

        .community-form {
            flex: 1;
            background-color: white;
            padding: 40px;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
        }

        .form-group {
            margin-bottom: 20px;
        }

        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 500;
        }

        .form-control {
            width: 100%;
            padding: 12px 15px;
            border: 1px solid #ddd;
            border-radius: var(--border-radius);
            font-family: inherit;
            font-size: 1rem;
            transition: var(--transition);
        }

        .form-control:focus {
            outline: none;
            border-color: var(--accent-color);
            box-shadow: 0 0 0 3px rgba(165, 42, 42, 0.2);
        }

        footer {
            background-color: var(--dark-color);
            color: white;
            padding: 60px 0 30px;
        }

        footer::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 4px;
            background: linear-gradient(90deg, var(--accent-color), var(--secondary-color));
        }

        .footer-content {
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-column {
            flex: 1;
            min-width: 250px;
        }

        .footer-column h3 {
            color: white;
            margin-bottom: 20px;
            font-size: 1.3rem;
        }

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

        .footer-links li {
            margin-bottom: 10px;
        }

        .footer-links a {
            color: #ddd;
        }

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

        .social-links {
            display: flex;
            gap: 15px;
            margin-top: 20px;
        }

        .social-links a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background-color: rgba(255, 255, 255, 0.1);
            border-radius: 50%;
            color: white;
            font-size: 1.2rem;
            transition: var(--transition);
        }

        .social-links a:hover {
            background-color: var(--primary-color);
            transform: translateY(-3px);
        }

        .copyright {
            text-align: center;
            padding-top: 30px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            color: #aaa;
            font-size: 0.85rem;
            line-height: 180%;
        }

        .copyright a {
            color: #aaa;
        }

        .none {
            display: none !important;
        }

        /* 响应式设计 */
        @media (max-width: 992px) {

            .hero-content,
            .about-content,
            .community-content {
                flex-direction: column;
            }

            .hero-text,
            .about-text,
            .community-text {
                max-width: 100%;
                text-align: center;
            }

            .hero-buttons {
                justify-content: center;
            }

            .instructor-profile {
                flex-direction: column;
                text-align: center;
            }

            h1 {
                font-size: 2.5rem;
            }

            .hero-text h1 {
                font-size: 2.8rem;
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
                position: absolute;
                top: 70px;
                left: 0;
                width: 100%;
                background-color: white;
                flex-direction: column;
                padding: 20px;
                box-shadow: 0 10px 15px rgba(0, 0, 0, 0.1);
            }

            .nav-links.active {
                display: flex;
            }

            .nav-links li {
                margin: 10px 0;
            }

            .mobile-menu-btn {
                display: block;
            }

            .hero {
                padding-top: 120px;
            }

            h1 {
                font-size: 2.2rem;
            }

            .hero-text h1 {
                font-size: 2.4rem;
            }

            section {
                padding: 60px 0;
            }
        }

        @media (max-width: 576px) {
            .hero-buttons {
                flex-direction: column;
                align-items: center;
            }

            .btn {
                width: 100%;
                max-width: 300px;
            }

            .course-cards {
                grid-template-columns: 1fr;
            }

            h1 {
                font-size: 2rem;
            }

            .hero-text h1 {
                font-size: 2.2rem;
            }
        }