/* 全局重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Microsoft Yahei",PingFang SC,Helvetica Neue,sans-serif;
}

a {
    text-decoration: none;
    color: inherit;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
}

.section {
    padding: 80px 0;
}

.bg-gray {
    background-color: #f8f9fa;
}

.section-title {
    text-align: center;
    margin-bottom: 60px;
}

.section-title h2 {
    font-size: 32px;
    color: #0a192f;
    font-weight: 700;
    margin-bottom: 10px;
}

.section-title p {
    font-size: 14px;
    color: #64748b;
    letter-spacing: 2px;
}

/* Beta测试版全局样式 */
.beta-top-notice {
    width: 100%;
    height: 36px;
    line-height: 36px;
    background: #ff7d00;
    color: #fff;
    text-align: center;
    font-size: 14px;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 9999;
}

.header {
    position: fixed;
    /* 顶部预留beta提示条高度 */
    top: 36px;
    left: 0;
    width: 100%;
    height: 70px;
    background: rgba(255,255,255,0.95);
    box-shadow: 0 2px 10px rgba(0,0,0,0.08);
    z-index: 999;
    transition: all 0.3s ease;
}

/* logo beta标签 */
.logo-beta-tag {
    font-size: 10px;
    color: #ff7d00;
    border: 1px solid #ff7d00;
    border-radius: 4px;
    padding: 2px 6px;
    margin-left: 8px;
    vertical-align: middle;
}

/* 全局水印 */
.global-watermark {
    position: absolute;
    right: 30px;
    bottom: 30px;
    font-size: 14px;
    color: rgba(255,255,255,0.3);
    letter-spacing: 1px;
    z-index: 2;
}

/* 页脚beta声明 */
.footer-beta-tip {
    font-size: 13px;
    color: #ff9f43;
    margin-bottom: 15px;
    opacity: 0.9;
}

.nav-wrap {
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.logo-en {
    font-size: 20px;
    font-weight: 700;
    color: #003366;
    letter-spacing: 1px;
}

.logo-cn {
    font-size: 12px;
    color: #666;
}

.nav {
    display: flex;
    gap: 40px;
}

.nav-item {
    font-size: 15px;
    color: #333;
    font-weight: 500;
    transition: color 0.3s;
    position: relative;
}

.nav-item.active,
.nav-item:hover {
    color: #003366;
}

.nav-item.active::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 100%;
    height: 2px;
    background: #003366;
}

/* 纯CSS菜单按钮，彻底替换失效外网图片，无任何外链 */
.menu-btn {
    display: none;
    width: 24px;
    height: 20px;
    position: relative;
}
.menu-btn::before,.menu-btn::after,.menu-btn span {
    content: '';
    position: absolute;
    width: 100%;
    height: 2px;
    background-color: #333;
    left: 0;
}
.menu-btn span {
    top: 9px;
}
.menu-btn::before {
    top: 0;
}
.menu-btn::after {
    bottom: 0;
}

/* Banner */
.banner {
    width: 100%;
    height: 100vh;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: #fff;
    /* 适配顶部beta条+导航栏 */
    padding-top: 106px;
}

.banner-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #002855 0%, #001a33 100%);
    z-index: -1;
}

.banner-en-slogan {
    font-size: 16px;
    letter-spacing: 3px;
    margin-bottom: 15px;
    opacity: 0.9;
}

.banner-slogan {
    font-size: 56px;
    font-weight: 700;
    margin-bottom: 20px;
}

.banner-desc {
    font-size: 18px;
    opacity: 0.85;
    margin-bottom: 40px;
    letter-spacing: 1px;
}

.banner-btn {
    display: inline-block;
    padding: 14px 40px;
    border: 1px solid #fff;
    border-radius: 30px;
    font-size: 16px;
    transition: all 0.3s ease;
}

.banner-btn:hover {
    background: #fff;
    color: #002855;
}

/* 关于我们 */
.about-wrap {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 50px;
    align-items: flex-start;
}

.about-text p {
    font-size: 16px;
    line-height: 2;
    color: #333;
    margin-bottom: 20px;
    text-align: justify;
}

.info-item {
    padding: 25px;
    background: #f8f9fa;
    border-radius: 8px;
    margin-bottom: 20px;
}

.info-item h4 {
    font-size: 18px;
    color: #003366;
    margin-bottom: 12px;
}

.info-item p {
    font-size: 14px;
    color: #555;
    line-height: 1.8;
}

/* 业务板块 */
.business-list {
    display: grid;
    grid-template-columns: repeat(2,1fr);
    gap: 30px;
}

.business-item {
    padding: 40px 30px;
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.05);
    transition: transform 0.3s ease;
}

.business-item:hover {
    transform: translateY(-8px);
}

.business-item h3 {
    font-size: 22px;
    color: #003366;
    margin-bottom: 15px;
}

.business-item p {
    font-size: 15px;
    color: #555;
    line-height: 1.9;
}

/* 企业文化 */
.culture-main {
    text-align: center;
}

.culture-slogan h3 {
    font-size: 24px;
    color: #0a192f;
    margin-bottom: 20px;
}

.core-val {
    font-size: 36px;
    color: #003366;
    font-weight: 700;
    letter-spacing: 4px;
    margin-bottom: 40px;
}

.culture-desc {
    max-width: 800px;
    margin: 0 auto 50px;
    display: grid;
    grid-template-columns: repeat(3,1fr);
    gap: 20px;
}

.culture-desc p {
    font-size: 15px;
    color: #444;
    line-height: 1.8;
    padding: 12px;
    background: #f8f9fa;
    border-radius: 6px;
}

.culture-tag {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.culture-tag span {
    padding: 10px 25px;
    border: 1px solid #003366;
    color: #003366;
    border-radius: 30px;
    font-size: 14px;
}

/* 招商合作 */
.cooperate-text {
    max-width: 900px;
    margin: 0 auto 40px;
    font-size: 16px;
    line-height: 2;
    color: #333;
    text-align: center;
}

.cooperate-advantage {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 20px;
}

.adv-item {
    padding: 12px 30px;
    background: #003366;
    color: #fff;
    border-radius: 30px;
    font-size: 15px;
}

/* 联系我们 */
.contact-list {
    display: flex;
    justify-content: center;
    gap: 60px;
    flex-wrap: wrap;
    text-align: center;
}

.contact-item h4 {
    font-size: 18px;
    color: #003366;
    margin-bottom: 12px;
}

.contact-item p {
    font-size: 16px;
    color: #333;
}

/* 页脚 */
.footer {
    padding: 60px 0 30px;
    background: #0a192f;
    color: #fff;
    text-align: center;
}

.footer-logo {
    margin-bottom: 20px;
}

.footer-en {
    display: block;
    font-size: 24px;
    font-weight: 700;
    letter-spacing: 2px;
    margin-bottom: 8px;
}

.footer-cn {
    font-size: 16px;
    opacity: 0.8;
}

.footer-slogan {
    font-size: 14px;
    opacity: 0.7;
    margin-bottom: 10px;
    letter-spacing: 1px;
}

.copyright {
    font-size: 12px;
    opacity: 0.5;
}

/* 响应式适配 */
@media (max-width: 992px) {
    .about-wrap {
        grid-template-columns: 1fr;
    }
    .business-list {
        grid-template-columns: 1fr;
    }
    .culture-desc {
        grid-template-columns: repeat(2,1fr);
    }
    .banner-slogan {
        font-size: 42px;
    }
}

@media (max-width: 768px) {
    .beta-top-notice {
        font-size: 12px;
        height: 32px;
        line-height: 32px;
    }
    .header {
        top: 32px;
    }
    .nav {
        display: none;
    }
    .menu-btn {
        display: block;
    }
    .culture-desc {
        grid-template-columns: 1fr;
    }
    .banner-slogan {
        font-size: 32px;
    }
    .core-val {
        font-size: 28px;
    }
    .contact-list {
        gap: 30px;
    }
    .section {
        padding: 50px 0;
    }
    .global-watermark {
        display: none;
    }
}