body {
    background: #f1f5f9;
    color: #22223b;
    font-family: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', Arial, sans-serif;
    margin: 0;
    padding: 0;
    text-align: center;
}

header {
    background: linear-gradient(90deg, #2563eb 0%, #22d3ee 100%);
    color: #fff;
    padding: 2rem 0 1rem 0;
    text-align: center;
    border-radius: 0 0 24px 24px;
}

header h1 {
    font-size: 2.5rem;
    font-weight: bold;
    margin-bottom: 0.5rem;
    letter-spacing: 2px;
}

header p {
    font-size: 1.1rem;
    margin-bottom: 1rem;
}

nav button {
    background: #fff;
    color: #2563eb;
    border: none;
    border-radius: 20px;
    padding: 0.5rem 1.5rem;
    margin: 0 0.5rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s, color 0.2s;
}
nav button:hover {
    background: #2563eb;
    color: #fff;
}

.system,
.services,
.image-section {
    margin: 2rem auto;
    max-width: 1100px;
    background: #fff;
    border-radius: 18px;
    box-shadow: 0 4px 24px rgba(37,99,235,0.08);
    padding: 2rem 2rem 1.5rem 2rem;
}

h2 {
    color: #2563eb;
    font-size: 1.6rem;
    margin-bottom: 1.2rem;
    text-align: center;
}

.systems,
.service-options,
.image-gallery {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0;
}

.system-card,
.service-card,
.image-card {
    background: #f8fafc;
    border-radius: 14px;
    box-shadow: 0 2px 8px rgba(37,99,235,0.06);
    padding: 1.5rem 1.2rem;
    min-width: 220px;
    max-width: 320px;
    text-align: center;
    margin-bottom: 1rem;
    transition: box-shadow 0.2s;
}
.system-card:hover, .service-card:hover, .image-card:hover {
    box-shadow: 0 6px 24px rgba(37,99,235,0.13);
}

.system-card h3,
.service-card h3
{
    color: #2563eb;
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}

.image-card h3{
    color: #9e8b3d
}
.image-section h3 {
    font-size: 14px;
    /* 根据需要调整大小 */
}

.system-card button,
.service-card button {
    background: #2563eb;
    color: #fff;
    border: none;
    border-radius: 16px;
    padding: 0.4rem 1.2rem;
    margin-top: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s;
}
.system-card button:hover {
    background: #22d3ee;
    color: #22223b;
}

.image-card img {
    width: 100%;
    max-width: 180px;
    border-radius: 10px;
    box-shadow: 0 2px 8px rgba(37,99,235,0.08);
    margin-bottom: 0.5rem;
}

footer {
    background: #2563eb;
    color: #fff;
    text-align: center;
    padding: 1rem 0;
    border-radius: 18px 18px 0 0;
    margin-top: 2rem;
    font-size: 1rem;
}
footer a {
    color: #22d3ee;
    text-decoration: underline;
}

/* 登录弹窗样式 */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    z-index: 1000;
}

.modal-content {
    background: #210b2c;
    padding: 20px;
    border-radius: 10px;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 300px;
}

.modal-content h2 {
    color: #ffcc00;
    margin-bottom: 20px;
}

.modal-content input {
    width: 100%;
    padding: 10px;
    margin: 10px 0;
    border: 1px solid #6a0572;
    border-radius: 5px;
    background: #14062c;
    color: white;
}

.modal-content button {
    background: #9d4edd;
    border: none;
    color: white;
    padding: 10px 15px;
    margin: 5px;
    cursor: pointer;
    border-radius: 5px;
}

.image-card {
    background: #f8fafc;
    border-radius: 14px;
    box-shadow: 0 2px 8px rgba(37,99,235,0.06);
    padding: 2rem;
    min-width: 400px;
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
    display: flex;
    justify-content: center;
    align-items: center;
}

.big-image {
    width: 100%;
    max-width: 700px;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 4px 24px rgba(37,99,235,0.13);
    border: 3px solid #2563eb;
    background: #fff;
}

.custom-image-showcase {
    margin: 2rem auto;
    max-width: 1100px;
    background: #fff;
    border-radius: 18px;
    box-shadow: 0 4px 24px rgba(37,99,235,0.08);
    padding: 2rem 2rem 1.5rem 2rem;
    text-align: center;
}

.custom-image-showcase h2 {
    color: #2563eb;
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
}

.custom-image-single {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 2rem 0;
}

.custom-image-single img {
    width: 100%;
    max-width: 900px;
    min-width: 240px;
    border-radius: 16px;
    box-shadow: 0 4px 24px rgba(37,99,235,0.13);
    border: 3px solid #2563eb;
    background: #fff;
    display: block;
    margin: 0 auto;
}