* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: Arial, Helvetica, sans-serif;
}
body {
    background-color: #f4f7fa;
    color: #222;
    line-height: 1.6;
}
.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 20px;
}
header {
    text-align: center;
    margin-bottom: 24px;
}
h1 {
    font-size: 32px;
    margin-bottom: 8px;
    color: #1a4b9c;
}
header p {
    font-size: 16px;
    color: #555;
}
.ad-banner {
    width: 100%;
    min-height: 90px;
    margin: 20px 0;
    border: 1px dashed #ccc;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #777;
}
.tool-box {
    display: flex;
    flex-direction: column;
    gap: 14px;
    margin: 30px 0;
}
textarea {
    width: 100%;
    min-height: 220px;
    padding: 14px;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-family: monospace;
    font-size: 14px;
}
.btn-group {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}
button {
    padding: 10px 20px;
    border: none;
    background: #2563eb;
    color: white;
    border-radius: 4px;
    cursor: pointer;
    font-size: 15px;
}
button:hover {
    background: #1d4ed8;
}
.intro-text {
    margin: 40px 0;
    padding: 24px;
    background: #fff;
    border-radius: 8px;
}
.intro-text h2 {
    margin-bottom: 12px;
    color: #1a4b9c;
}
.intro-text p {
    margin-bottom: 10px;
    font-size: 15px;
    color: #333;
}
footer {
    margin-top: 50px;
    padding-top: 20px;
    border-top: 1px solid #ddd;
    text-align: center;
    font-size: 14px;
    color: #666;
}
footer a {
    color: #2563eb;
    text-decoration: none;
}
.policy-wrap h2 {
    margin: 24px 0 10px;
    color: #1a4b9c;
}
.policy-wrap p {
    margin-bottom: 12px;
}
.back-home {
    margin-top: 40px;
}
.back-home a {
    color: #2563eb;
    font-size: 16px;
}
/* 移动端适配 */
@media (max-width: 768px) {
    h1 {
        font-size: 24px;
    }
    .btn-group {
        flex-direction: column;
    }
    textarea {
        min-height: 160px;
    }
}