* { margin: 0; padding: 0; box-sizing: border-box; font-family: "Microsoft YaHei", sans-serif; }
body { line-height: 1.6; color: #333; background-color: #fff; }
.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 20px; }
header { background: #fff; padding: 15px 0; border-bottom: 1px solid #eee; position: sticky; top: 0; z-index: 100; }
.header-content { display: flex; justify-content: space-between; align-items: center; }
.logo { font-size: 24px; font-weight: bold; color: #1a1a1a; text-decoration: none; }
nav ul { list-style: none; display: flex; gap: 30px; }
nav a { text-decoration: none; color: #666; font-size: 16px; padding: 5px 0; transition: color 0.3s; }
nav a:hover, nav a.active { color: #e60012; border-bottom: 2px solid #e60012; }
.main-banner {
    /* 核心修改：将 `background` 属性替换为您的图片 */
    background: url('images/banner1.jpg') no-repeat center center;
    background-size: cover; /* 确保图片覆盖整个区域 */
    text-align: center;
    padding: 140px 20px;
    margin-bottom: 60px;
    /* 可选：可以添加一个深色半透明遮罩，让文字更清晰 */
    /* background: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)), url('images/banner-bg.jpg') no-repeat center center; */
}

.main-banner h1 {
    color: #fff; /* 将标题改为白色 */
}
.main-banner .subtitle {
    color: rgba(255, 255, 255, 0.9); /* 将副标题改为浅白色，略带透明 */
}
.section { margin-bottom: 80px; }
.section-header { text-align: center; margin-bottom: 50px; }
.section-title-en { font-size: 14px; color: #999; letter-spacing: 2px; margin-bottom: 10px; }
.section-title-zh { font-size: 2em; color: #1a1a1a; margin-bottom: 20px; }
.section-desc { font-size: 16px; color: #666; max-width: 800px; margin: 0 auto; }
.grid-4 { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 30px; }
.card { background: #fff; border: 1px solid #eee; border-radius: 8px; padding: 30px; text-align: center; transition: box-shadow 0.3s; }
.card:hover { box-shadow: 0 5px 20px rgba(0,0,0,0.08); }
.card h3 { font-size: 1.4em; margin-bottom: 15px; color: #1a1a1a; }
.card p { color: #666; line-height: 1.8; }
.partners { background: #f9f9f9; padding: 60px 0; text-align: center; }
.partner-logos { display: flex; flex-wrap: wrap; justify-content: center; gap: 40px; margin-top: 40px; }
.partner-logos p { background: #fff; padding: 20px 40px; border-radius: 6px; color: #999; border: 1px dashed #ddd; }
footer { background: #1a1a1a; color: #ccc; padding: 50px 0 20px; }
.footer-content { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 40px; margin-bottom: 40px; }
.footer-column h4 { color: #fff; margin-bottom: 20px; font-size: 1.1em; }
.footer-links { list-style: none; }
.footer-links li { margin-bottom: 10px; }
.footer-links a { color: #aaa; text-decoration: none; transition: color 0.3s; }
.footer-links a:hover { color: #fff; }
.contact-info { color: #aaa; }
.copyright { text-align: center; padding-top: 20px; border-top: 1px solid #333; font-size: 0.9em; color: #888; }