* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: "Microsoft YaHei", "PingFang SC", "Segoe UI", sans-serif;
    background: #ffffff;
    color: #111111;
    line-height: 1.6;
}

a {
    color: #111111;
    text-decoration: none;
}

img {
    max-width: 100%;
    display: block;
}

.container {
    width: 100%;
    max-width: 1120px;
    margin: 0 auto;
    padding: 0 20px;
}

.hero {
    background: #f6f6f6;
    padding: 72px 0 64px;
}

.badge {
    display: inline-block;
    background: #111111;
    color: #ffffff;
    padding: 6px 14px;
    border-radius: 999px;
    font-size: 14px;
    letter-spacing: 1px;
    margin-bottom: 16px;
}

.hero h1 {
    font-size: 36px;
    margin-bottom: 16px;
}

.sub {
    font-size: 18px;
    color: #333333;
    margin-bottom: 28px;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 28px;
}

.hero-banner {
    margin-bottom: 24px;
    display: flex;
    justify-content: center;
}

.banner-image {
    width: 100%;
    height: auto;
    border-radius: 24px;
    border: 1px solid #e5e5e5;
    box-shadow: 0 12px 28px rgba(0, 0, 0, 0.1);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    border-radius: 16px;
    font-size: 16px;
    border: 1px solid #111111;
    transition: all 0.2s ease;
}

.btn-primary {
    background: #111111;
    color: #ffffff;
}

.btn-primary:hover {
    background: #000000;
}

.btn-ghost {
    background: #ffffff;
    color: #111111;
}

.btn-ghost:hover {
    background: #eaeaea;
}

.keywords {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.keywords span {
    background: #ffffff;
    border: 1px solid #dddddd;
    padding: 6px 12px;
    border-radius: 999px;
    font-size: 13px;
    color: #333333;
}

.section {
    padding: 64px 0;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 20px;
}

.card {
    background: #ffffff;
    border: 1px solid #e5e5e5;
    border-radius: 20px;
    padding: 24px;
    box-shadow: 0 10px 24px rgba(0, 0, 0, 0.08);
}

.card h2 {
    font-size: 22px;
    margin-bottom: 16px;
}

.card ul {
    list-style: none;
    color: #333333;
}

.card li + li {
    margin-top: 10px;
}

.contact {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
    align-items: start;
}

.contact-text h2 {
    font-size: 28px;
    margin-bottom: 12px;
}

.contact-text p {
    color: #333333;
    margin-bottom: 20px;
}

.contact-meta {
    display: flex;
    flex-direction: column;
    gap: 8px;
    color: #333333;
}

.contact-form {
    background: #f8f8f8;
    border-radius: 20px;
    padding: 24px;
    border: 1px solid #e5e5e5;
    display: grid;
    gap: 16px;
}

.contact-form label {
    display: grid;
    gap: 8px;
    font-size: 14px;
    color: #333333;
}

.contact-form input,
.contact-form textarea {
    border: 1px solid #cccccc;
    border-radius: 12px;
    padding: 10px 12px;
    font-size: 14px;
    background: #ffffff;
    color: #111111;
}

.contact-form textarea {
    min-height: 96px;
    resize: vertical;
}

.form-tip {
    min-height: 20px;
    font-size: 13px;
    color: #111111;
}

.footer {
    background: #111111;
    color: #ffffff;
    padding: 28px 0;
    font-size: 13px;
    text-align: center;
}

@media (max-width: 640px) {
    .hero h1 {
        font-size: 28px;
    }

    .sub {
        font-size: 16px;
    }
}