* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Microsoft YaHei", sans-serif;
}

body {
    background: #f5f7fa;
    color: #333;
    line-height: 1.7;
}

.container {
    max-width: 960px;
    margin: 0 auto;
    padding: 20px;
}

/* 头部 */
.header {
    text-align: center;
    padding: 30px 0;
}
.logo {
    font-size: 26px;
    font-weight: bold;
    color: #0d47a1;
}
.subtitle {
    font-size: 16px;
    color: #666;
    margin-top: 5px;
}

/* 主标题 */
.hero {
    text-align: center;
    padding: 40px 20px;
}
.hero h1 {
    font-size: 32px;
    color: #111;
    margin-bottom: 15px;
}
.hero p {
    font-size: 18px;
    color: #444;
}

/* 区块 */
.section {
    margin: 50px 0;
}
.section h2 {
    font-size: 24px;
    text-align: center;
    margin-bottom: 25px;
    color: #222;
    position: relative;
}
.section h2::after {
    content: "";
    width: 60px;
    height: 3px;
    background: #0d47a1;
    display: block;
    margin: 10px auto;
}

/* 卡片 */
.card {
    background: white;
    padding: 25px;
    border-radius: 12px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    text-align: center;
    font-size: 17px;
}
.name {
    color: #0d47a1;
    font-weight: bold;
}

/* 网格布局 */
.grid {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    justify-content: center;
}
.item {
    background: white;
    width: 160px;
    padding: 20px;
    text-align: center;
    border-radius: 10px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
    font-weight: 500;
}

/* 策略标签 */
.strategies {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    justify-content: center;
    margin-bottom: 25px;
}
.strategies span {
    background: #e3f2fd;
    color: #0d47a1;
    padding: 10px 16px;
    border-radius: 30px;
    font-weight: bold;
}
.desc {
    text-align: center;
    font-size: 17px;
    color: #333;
}

/* AI 核心 */
.blue {
    background: #0d47a1;
    color: white;
    padding: 40px 20px;
    border-radius: 15px;
}
.blue h2 {
    color: white;
}
.blue h2::after {
    background: white;
}
.ai-desc {
    text-align: center;
    font-size: 17px;
    line-height: 2.2;
}
.mission {
    text-align: center;
    margin-top: 25px;
    font-size: 18px;
    font-weight: bold;
}

/* 联系 */
.contact {
    text-align: center;
}
.email {
    font-size: 20px;
    font-weight: bold;
    color: #0d47a1;
    background: white;
    display: inline-block;
    padding: 15px 30px;
    border-radius: 50px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.07);
}

/* 底部 */
footer {
    text-align: center;
    padding: 30px 0;
    color: #666;
    font-size: 14px;
}