body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    margin: 0;
    padding: 40px 20px;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    min-height: 100vh;
    color: #333;
    text-align: center;
}
.container {
    max-width: 960px;
    margin: 0 auto;
    background: rgba(255, 255, 255, 0.9);
    padding: 36px;
    border-radius: 16px;
    backdrop-filter: blur(10px);
}
.header-icon {
    margin-bottom: 20px;
}

.page-icon {
    width: 64px;
    height: 64px;
    display: block;
    margin: 0 auto;
    border-radius: 12px;
}

h1 {
    font-size: 2.3rem;
    margin: 0 auto 16px;
    color: #2d3748;
    max-width: 680px;
}
.instruction {
    font-size: 1.1rem;
    margin: 0 auto;
    color: #4a5568;
    line-height: 1.6;
    max-width: 680px;
}
.screenshot {
    margin: 0 auto;
    overflow: hidden;
    max-width: 800px;
}
.screenshot img {
    width: 100%;
    height: auto;
    display: block;
}
/* .step {
    margin: 25px 0;
} */
.step h2 {
    font-size: 1.3rem;
    margin-bottom: 10px;
    color: #2d3748;
}