/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Arial', sans-serif;
}

p {
    white-space: pre-line;
}

:root {
    --primary-blue: #1a365d;
    --dark-blue: #0f1e3a;
    --light-blue: #2d74da;
    --white: #ffffff;
    --light-gray: #f5f7fa;
    --dark-gray: #4a5568;
}

body {
    color: var(--dark-gray);
    line-height: 1.6;
    background-color: var(--white);
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 导航栏样式 */
header {
    position: sticky;
    top: 0;
    z-index: 100;
    height: 80px;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all ease 0.3s;
    padding: 20px 0;
}

.logo {
    font-size: 24px;
    font-weight: bold;
    color: var(--primary-blue);
    text-decoration: none;
    font-family: 'Helvetica', sans-serif;
}

.nav-links {
    display: flex;
    list-style: none;
}

.nav-links li {
    margin-left: 30px;
}

.nav-links a {
    text-decoration: none;
    color: var(--dark-gray);
    font-weight: 500;
    transition: color 0.3s;
}

.nav-links a:hover {
    color: var(--light-blue);
}

.cta-button {
    background-color: var(--light-blue);
    color: var(--white);
    padding: 10px 20px;
    border-radius: 4px;
    text-decoration: none;
    font-weight: 500;
    transition: background-color 0.3s;
}

.cta-button:hover {
    background-color: var(--primary-blue);
}

/* Hero区域样式 */
.hero {
    /* background: linear-gradient(135deg, var(--primary-blue) 0%, var(--dark-blue) 100%); */
    color: var(--white);
    /* padding: 100px 0; */
    text-align: center;
}

.hero .banner {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.hero h1 {
    font-size: 48px;
    margin-bottom: 20px;
    font-weight: 700;
}

.hero p {
    font-size: 20px;
    max-width: 700px;
    margin: 0 auto 30px;
    opacity: 0.9;
}

/* 关于区域样式 */
.about {
    padding: 100px 0;
    background-color: var(--white);
}

.section-title {
    text-align: center;
    margin-bottom: 60px;
    color: var(--primary-blue);
    font-size: 36px;
}

.about-content {
    display: flex;
    align-items: center;
    gap: 60px;
}

.about-text {
    flex: 1;
}

.about-text h3 {
    font-size: 28px;
    margin-bottom: 20px;
    color: var(--primary-blue);
}

.about-image-box {
    flex: 1;
}

.about-image {
    background-color: var(--light-gray);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--dark-gray);
    font-weight: 500;
    width: 100%;
}

/* 服务区域样式 */
.services {
    padding: 100px 0;
    background-color: var(--light-gray);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 30px;
}

.service-card {
    background-color: var(--white);
    border-radius: 8px;
    padding: 30px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s, box-shadow 0.3s;
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.service-icon {
    width: 60px;
    height: 60px;
    background-color: rgba(45, 116, 218, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    color: var(--light-blue);
    font-size: 24px;
}

.service-card h3 {
    font-size: 20px;
    margin-bottom: 15px;
    color: var(--primary-blue);
}

/* 联系区域样式 */
.contact {
    padding: 100px 0;
    background-color: var(--white);
}

.contact-content {
    display: flex;
    gap: 60px;
}

.contact-inner {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.contact-inner p {
    text-align: center;
}

.contact-info {
    flex: 1;
}

.contact-details {
    display: flex;
    margin-top: 30px;
}

.contact-item {
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    align-items: center;
    margin-bottom: 20px;
    flex: 1;
}

.contact-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 15px;
}

.contact-form {
    flex: 1;
    background-color: var(--light-gray);
    padding: 30px;
    border-radius: 8px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 16px;
}

.form-group textarea {
    height: 120px;
    resize: vertical;
}

.submit-btn {
    background-color: var(--light-blue);
    color: var(--white);
    border: none;
    padding: 12px 24px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 500;
    transition: background-color 0.3s;
}

.submit-btn:hover {
    background-color: var(--primary-blue);
}

.small-banner{
    width: 100%;
    min-height: 120px;
    object-fit: cover;
}

/* 页脚样式 */
footer {
    background-color: var(--dark-blue);
    color: var(--white);
    padding: 50px 0 20px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-logo {
    font-size: 24px;
    font-weight: bold;
    margin-bottom: 20px;
}

.footer-links {
    display: flex;
    gap: 40px;
}

.footer-column h4 {
    margin-bottom: 20px;
    font-size: 18px;
}


.footer-column ul {
    list-style: none;
}

.footer-column ul li {
    margin-bottom: 10px;
}

.footer-column ul li a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: color 0.3s;
}

.footer-column ul li a:hover {
    color: var(--white);
}

.footer-about{
    flex: 1;
}

.copyright {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.7);
    font-size: 14px;
}

.navbar-nav .nav-item {
    display: flex;
    align-items: center;
}

/* 响应式设计 */
@media (min-width: 993px) {
    .nav-item .cta-button {
        margin-left: 30px;
    }
    .footer-links{
        max-width: 60%;
    }
    .footer-column h4{
        padding-left: 1rem;
    }
    .footer-column ul {
        padding-left: 1rem;
    }
}

@media (max-width: 992px) {
    .about{
        padding: 60px 0 100px 0;
    }
    .footer-column ul {
        padding-left: 0;
    }
    /* .navbar-collapse {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--white);
        box-shadow: 0 5px 10px rgba(0, 0, 0, 0.05);
        padding: 20px;
        border-radius: 0 0 8px 8px;
        z-index: 99;
    }

    .navbar-nav {
        gap: 10px;
    } */

    .nav-item .cta-button {
        display: block;
        /* CTA 按钮独占一行 */
        text-align: center;
        margin-top: 10px;
    }

    .about-content,
    .contact-content {
        flex-direction: column;
    }

    .footer-content {
        flex-direction: column;
        gap: 30px;
    }

    .footer-links {
        flex-wrap: wrap;
    }

    .contact-details{
        flex-direction: column;

    }
}

@media (max-width: 768px) {

    .nav-links {
        margin-top: 15px;
    }

    .nav-links li {
        margin-left: 15px;
        margin-right: 15px;
    }

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

    .hero p {
        font-size: 18px;
    }

    .services-grid {
        grid-template-columns: 1fr;
    }
}