/* 基础样式 */
body, html {
    margin: 0;
    padding: 0;
    font-family: 'Helvetica Neue', sans-serif;
    background: linear-gradient(135deg, #F2F2F2, #FFFFFF);
    color: #1C1C1E;
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
}

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

h1, h2, h3, h4, h5, h6 {
    font-weight: bold;
    color: #1C1C1E;
    margin-top: 2rem;
}

h1 {
    font-size: 48px;
    text-align: center;
    margin-bottom: 1rem;
}

h2 {
    font-size: 36px;
    margin-bottom: 1.5rem;
}

h3 {
    font-size: 28px;
    margin-bottom: 1rem;
}

p {
    font-size: 18px;
    margin-bottom: 1.5rem;
    color: #4A4A4A;
}

a {
    text-decoration: none;
    color: #7ED321;
}

button {
    background-color: #7ED321;
    border: none;
    color: white;
    padding: 15px 30px;
    font-size: 18px;
    cursor: pointer;
    border-radius: 5px;
    transition: all 0.3s ease;
}

button:hover {
    background-color: #5EB81C;
}

section {
    margin-bottom: 50px;
}

img {
    max-width: 100%;
    height: auto;
    border-radius: 10px;
}

.hero {
    background: url('https://images.gptkong.com/product/iphone16/iphone16-1.png') no-repeat center center/cover;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    text-align: center;
}

.hero h1 {
    font-size: 56px;
    margin-bottom: 20px;
}

.hero p {
    font-size: 24px;
    margin-bottom: 30px;
}

.features {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
}

.feature {
    background: #F2F2F2;
    padding: 20px;
    border-radius: 10px;
    flex: 1 1 calc(33.333% - 40px);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.feature:hover {
    transform: translateY(-10px);
}

.feature img {
    margin-bottom: 15px;
}

.footer {
    background: #1C1C1E;
    color: white;
    text-align: center;
    padding: 20px;
}

@media (max-width: 1200px) {
    .feature {
        flex: 1 1 calc(50% - 40px);
    }
}

@media (max-width: 768px) {
    .hero h1 {
        font-size: 48px;
    }

    .hero p {
        font-size: 20px;
    }

    .feature {
        flex: 1 1 100%;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 10px;
    }

    h1 {
        font-size: 36px;
    }

    h2 {
        font-size: 30px;
    }

    p {
        font-size: 16px;
    }

    button {
        padding: 10px 20px;
        font-size: 16px;
    }
}