:root {
        --pink: #ffb3d1;
        --purple: #d4bbff;
        --blue: #a2d2ff;
        --deep-purple: #5a4a7b;
        --text-main: #3a2e4a;
        --text-light: #6b5b8a;
        --bg-gradient: linear-gradient(135deg, #fdf5ff 0%, #f0e6ff 40%, #e6f0ff 100%);
        --card-bg: rgba(255, 255, 255, 0.85);
        --radius: 20px;
        --shadow: 0 12px 32px rgba(160, 130, 200, 0.15);
        --transition: all 0.3s ease;
    }

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

    body {
        font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
        background: var(--bg-gradient);
        color: var(--text-main);
        line-height: 1.6;
        overflow-x: hidden;
        -webkit-font-smoothing: antialiased;
    }

    /* 顶部导航 */
    header {
        position: sticky;
        top: 0;
        z-index: 100;
        background: rgba(255, 255, 255, 0.75);
        backdrop-filter: blur(12px);
        -webkit-backdrop-filter: blur(12px);
        border-bottom: 1px solid rgba(200, 180, 230, 0.3);
        padding: 12px 20px;
        display: flex;
        align-items: center;
        justify-content: space-between;
        transition: var(--transition);
    }

    .brand {
        display: flex;
        align-items: center;
        gap: 10px;
    }

    .brand img {
        height: 34px;
        width: auto;
        border-radius: 8px;
    }

    .brand span {
        font-size: 1.1rem;
        font-weight: 700;
        color: var(--deep-purple);
        letter-spacing: 0.5px;
    }

    nav {
        display: none;
    }

    nav a {
        text-decoration: none;
        color: var(--text-light);
        font-size: 0.9rem;
        font-weight: 600;
        padding: 8px 12px;
        border-radius: 12px;
        transition: var(--transition);
    }

    nav a:hover {
        background: rgba(213, 187, 255, 0.3);
        color: var(--deep-purple);
    }

    /* 首屏 */
    .hero {
        position: relative;
        padding: 60px 20px 80px;
        text-align: center;
        background: linear-gradient(180deg, rgba(255, 179, 209, 0.15) 0%, rgba(162, 210, 255, 0.2) 100%);
        border-bottom-left-radius: 40px;
        border-bottom-right-radius: 40px;
        overflow: hidden;
    }

    .hero::before {
        content: '';
        position: absolute;
        top: -50%;
        left: -20%;
        width: 140%;
        height: 140%;
        background: radial-gradient(circle, rgba(212, 187, 255, 0.4) 0%, transparent 60%);
        z-index: 0;
        pointer-events: none;
    }

    .hero-content {
        position: relative;
        z-index: 1;
        max-width: 800px;
        margin: 0 auto;
    }

    h1 {
        font-size: 2rem;
        font-weight: 800;
        color: var(--deep-purple);
        margin-bottom: 16px;
        line-height: 1.3;
    }

    .hero p {
        font-size: 1.05rem;
        color: var(--text-light);
        margin-bottom: 32px;
        max-width: 600px;
        margin-left: auto;
        margin-right: auto;
    }

    .download-group {
        display: flex;
        flex-direction: column;
        gap: 16px;
        align-items: center;
    }

    .btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        text-decoration: none;
        font-weight: 600;
        font-size: 1.05rem;
        border-radius: 30px;
        padding: 14px 36px;
        transition: var(--transition);
        border: none;
        cursor: pointer;
        width: 100%;
        max-width: 280px;
    }

    .btn-primary {
        background: linear-gradient(135deg, #ff9ecb 0%, #c49fff 100%);
        color: #fff;
        box-shadow: 0 8px 24px rgba(196, 159, 255, 0.4);
    }

    .btn-primary:hover {
        transform: translateY(-2px);
        box-shadow: 0 12px 32px rgba(196, 159, 255, 0.6);
    }

    .btn-secondary {
        background: #fff;
        color: var(--deep-purple);
        box-shadow: 0 6px 20px rgba(160, 130, 200, 0.15);
        border: 1px solid rgba(196, 159, 255, 0.3);
    }

    .btn-secondary:hover {
        background: #fdf5ff;
        transform: translateY(-2px);
    }

    /* 通用区块 */
    section {
        padding: 60px 20px;
        max-width: 1100px;
        margin: 0 auto;
    }

    .section-header {
        text-align: center;
        margin-bottom: 40px;
    }

    .section-header h2 {
        font-size: 1.8rem;
        font-weight: 700;
        color: var(--deep-purple);
        margin-bottom: 12px;
    }

    .section-header p {
        font-size: 1rem;
        color: var(--text-light);
        max-width: 600px;
        margin: 0 auto;
    }

    /* 卡片网格 */
    .grid {
        display: grid;
        gap: 24px;
        grid-template-columns: 1fr;
    }

    .card {
        background: var(--card-bg);
        border-radius: var(--radius);
        overflow: hidden;
        box-shadow: var(--shadow);
        transition: var(--transition);
        display: flex;
        flex-direction: column;
    }

    .card:hover {
        transform: translateY(-4px);
        box-shadow: 0 16px 40px rgba(160, 130, 200, 0.25);
    }

    .card-img {
        width: 100%;
        aspect-ratio: 3 / 4;
        object-fit: cover;
        display: block;
        background: #f0e6ff;
    }

    .card-body {
        padding: 20px;
        flex: 1;
        display: flex;
        flex-direction: column;
        justify-content: space-between;
    }

    .card-body h3 {
        font-size: 1.15rem;
        font-weight: 700;
        color: var(--deep-purple);
        margin-bottom: 8px;
    }

    .card-body p {
        font-size: 0.9rem;
        color: var(--text-light);
        line-height: 1.6;
    }

    /* 图文区块 */
    .feature-block {
        display: flex;
        flex-direction: column;
        gap: 32px;
        margin-bottom: 60px;
    }

    .feature-block:last-child {
        margin-bottom: 0;
    }

    .feature-text h3 {
        font-size: 1.5rem;
        font-weight: 700;
        color: var(--deep-purple);
        margin-bottom: 16px;
    }

    .feature-text p {
        font-size: 1rem;
        color: var(--text-light);
        margin-bottom: 16px;
    }

    .feature-text ul {
        list-style: none;
        padding: 0;
    }

    .feature-text ul li {
        position: relative;
        padding-left: 24px;
        margin-bottom: 12px;
        color: var(--text-main);
        font-size: 0.95rem;
    }

    .feature-text ul li::before {
        content: '🌸';
        position: absolute;
        left: 0;
        top: 2px;
        font-size: 0.9rem;
    }

    .feature-img {
        border-radius: var(--radius);
        overflow: hidden;
        box-shadow: var(--shadow);
    }

    .feature-img img {
        width: 100%;
        height: auto;
        display: block;
    }

    /* 页脚 */
    footer {
        background: rgba(255, 255, 255, 0.6);
        border-top: 1px solid rgba(200, 180, 230, 0.3);
        padding: 40px 20px;
        text-align: center;
        font-size: 0.85rem;
        color: var(--text-light);
    }

    .footer-content {
        max-width: 800px;
        margin: 0 auto;
        display: flex;
        flex-direction: column;
        gap: 12px;
    }

    .footer-content a {
        color: var(--text-light);
        text-decoration: none;
        transition: var(--transition);
    }

    .footer-content a:hover {
        color: var(--deep-purple);
    }

    .footer-links {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        gap: 8px 16px;
        margin-top: 8px;
        font-size: 0.8rem;
    }

    .footer-links span {
        color: rgba(107, 91, 138, 0.5);
    }

    time {
        font-size: 0.8rem;
        color: rgba(107, 91, 138, 0.6);
    }

    /* 弹窗 */
    .modal-overlay {
        display: none;
        position: fixed;
        inset: 0;
        background: rgba(58, 46, 74, 0.6);
        backdrop-filter: blur(4px);
        -webkit-backdrop-filter: blur(4px);
        z-index: 1000;
        align-items: center;
        justify-content: center;
        padding: 20px;
    }

    .modal-overlay.active {
        display: flex;
    }

    .modal-box {
        background: #fff;
        border-radius: 24px;
        padding: 32px 24px;
        max-width: 400px;
        width: 100%;
        text-align: center;
        box-shadow: 0 20px 60px rgba(0, 0, 0, 0.2);
        animation: modalIn 0.3s ease;
    }

    @keyframes modalIn {
        from { opacity: 0; transform: scale(0.95) translateY(10px); }
        to { opacity: 1; transform: scale(1) translateY(0); }
    }

    .modal-box h4 {
        font-size: 1.1rem;
        color: var(--text-main);
        margin-bottom: 20px;
        font-weight: 600;
        line-height: 1.5;
    }

    .modal-input {
        width: 100%;
        padding: 12px 16px;
        border: 1px solid #e0d4f0;
        border-radius: 12px;
        font-size: 0.95rem;
        color: var(--text-main);
        background: #faf7ff;
        margin-bottom: 16px;
        outline: none;
        text-align: center;
    }

    .modal-input:focus {
        border-color: var(--purple);
    }

    .modal-btn {
        background: linear-gradient(135deg, #ff9ecb 0%, #c49fff 100%);
        color: #fff;
        border: none;
        border-radius: 12px;
        padding: 12px 24px;
        font-size: 1rem;
        font-weight: 600;
        cursor: pointer;
        width: 100%;
        transition: var(--transition);
    }

    .modal-btn:hover {
        opacity: 0.9;
    }

    /* 滚动动画 */
    .fade-up {
        transition: opacity 0.6s ease, transform 0.6s ease;
    }

    /* 响应式 */
    @media (min-width: 768px) {
        h1 {
            font-size: 2.8rem;
        }

        .hero {
            padding: 80px 20px 100px;
        }

        .download-group {
            flex-direction: row;
            justify-content: center;
        }

        .btn {
            width: auto;
        }

        .grid-2 {
            grid-template-columns: repeat(2, 1fr);
        }

        .grid-3 {
            grid-template-columns: repeat(3, 1fr);
        }

        .feature-block {
            flex-direction: row;
            align-items: center;
        }

        .feature-block.reverse {
            flex-direction: row-reverse;
        }

        .feature-text {
            flex: 1;
        }

        .feature-img {
            flex: 1;
        }

        nav {
            display: flex;
            gap: 4px;
        }
    }

    @media (min-width: 1024px) {
        h1 {
            font-size: 3.2rem;
        }

        .hero {
            padding: 100px 20px 120px;
        }

        section {
            padding: 80px 20px;
        }

        .section-header h2 {
            font-size: 2.2rem;
        }

        .grid-4 {
            grid-template-columns: repeat(4, 1fr);
        }
    }