* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Microsoft Yahei", sans-serif;
}
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}
.header {
    background: #2d3748;
    color: #fff;
    padding: 15px 0;
}
.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}
.nav {
    display: flex;
    gap: 30px;
    margin-left: auto;
}
.nav a {
    color: #fff;
    text-decoration: none;
    line-height: 40px;
}
.banner {
    background: #3182ce;
    color: #fff;
    padding: 60px 0;
    text-align: center;
}
.tools-section {
    padding: 60px 0;
}
.section-title {
    text-align: center;
    margin-bottom: 40px;
    font-size: 28px;
}
.tools-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}
.tool-card {
    border: 1px solid #e2e8f0;
    border-radius: 8px;
    padding: 30px;
    text-align: center;
    background: #fff;
}
.btn {
    display: inline-block;
    background: #3182ce;
    color: #fff;
    padding: 10px 20px;
    border-radius: 4px;
    text-decoration: none;
    margin-top: 15px;
    border: none;
    cursor: pointer;
}
.footer {
    background: #2d3748;
    color: #fff;
    text-align: center;
    padding: 20px 0;
    margin-top: 60px;
}
.install-container, .tool-box {
    max-width: 800px;
    margin: 50px auto;
    padding: 30px;
    border: 1px solid #e2e8f0;
    border-radius: 8px;
    background: #fff;
}
.form-group {
    margin-bottom: 20px;
}
.form-group label {
    display: block;
    margin-bottom: 5px;
}
.form-group input, .form-group textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid #e2e8f0;
    border-radius: 4px;
}
.error {
    background: #fef2f2;
    color: #dc2626;
    padding: 15px;
    border-radius: 4px;
    margin-bottom: 20px;
}
.success {
    background: #f0fdf4;
    color: #16a34a;
    padding: 15px;
    border-radius: 4px;
    margin-bottom: 20px;
}
.login-page {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background: #f5f5f5;
}
.login-box {
    background: #fff;
    padding: 40px;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
    width: 400px;
}
.result-box {
    margin-top: 20px;
    padding: 15px;
    border: 1px solid #e2e8f0;
    border-radius: 4px;
    background: #f9f9f9;
    min-height: 100px;
}
.btn-group {
    display: flex;
    gap: 10px;
    margin: 15px 0;
}
textarea {
    width: 100%;
    min-height: 150px;
    padding: 10px;
    border: 1px solid #e2e8f0;
    border-radius: 4px;
    resize: vertical;
}