:root {
    --primary-color: #BF7500;
    --text-color: #1D1D1F;
    --secondary-text: #86868B;
    --background-color: #F5F5F7;
    --card-background: rgba(255, 255, 255, 0.8);
    --border-radius: 20px;
    --spacing: 20px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
    margin: 0;
    padding: 0;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 40px 20px;
}

header {
    text-align: center;
    margin-bottom: 50px;
}

.app-icon {
    width: 120px;
    height: 120px;
    border-radius: 24px;
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
    margin-bottom: 20px;
}

h1 {
    font-size: 40px;
    font-weight: 700;
    margin-bottom: 10px;
}

h2 {
    font-size: 24px;
    font-weight: 600;
    margin-top: 30px;
    margin-bottom: 15px;
}

p {
    font-size: 17px;
    color: var(--text-color);
    margin-bottom: 15px;
}

.subtitle {
    font-size: 24px;
    color: var(--secondary-text);
    font-weight: 500;
}

.card {
    background: var(--card-background);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: var(--border-radius);
    padding: 40px;
    box-shadow: 0 4px 24px rgba(0,0,0,0.05);
    margin-bottom: 30px;
}

.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin: 40px 0;
}

.feature-item {
    background: white;
    padding: 25px;
    border-radius: 16px;
    box-shadow: 0 2px 12px rgba(0,0,0,0.03);
}

.feature-title {
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--primary-color);
}

.links {
    text-align: center;
    margin: 40px 0;
}

.links a {
    color: var(--primary-color);
    text-decoration: none;
    margin: 0 15px;
    font-weight: 500;
}

.links a:hover {
    text-decoration: underline;
}

footer {
    text-align: center;
    color: var(--secondary-text);
    font-size: 14px;
    margin-top: 60px;
    padding-bottom: 40px;
}

.wechat-info {
    margin-top: 10px;
    font-weight: 500;
    color: var(--text-color);
}

ul {
    padding-left: 20px;
    margin-bottom: 15px;
}

li {
    margin-bottom: 8px;
}

@media (max-width: 600px) {
    h1 {
        font-size: 32px;
    }
    .card {
        padding: 25px;
    }
}