* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: "Microsoft YaHei", sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #fff;
}

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

header {
    height: 80px;
    display: flex;
    align-items: center;
    background: rgba(255, 255, 255, 0.1);
    position: absolute;
    width: 100%;
    top: 0;
    z-index: 1000;
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.logo img {
    height: 40px;
}

nav a {
    margin-left: 30px;
    text-decoration: none;
    color: #fff;
    font-size: 14px;
}

.hero {
    background: #3a8ee6 url('../images/2974246_184453203.jpg') no-repeat center center;
    background-size: cover;
    padding: 150px 0 100px;
    color: #fff;
    text-align: center;
}

.hero-text h1 {
    font-size: 60px;
    margin-bottom: 10px;
}

.hero-text h2 {
    font-size: 36px;
    margin-bottom: 20px;
    font-weight: normal;
}

.hero-text p {
    font-size: 16px;
    max-width: 600px;
    margin: 0 auto 40px;
    opacity: 0.8;
}

.btn-download-main {
    display: inline-block;
    background-color: #409eff;
    color: #fff;
    padding: 15px 60px;
    border-radius: 4px;
    text-decoration: none;
    font-size: 18px;
    font-weight: bold;
    border: 1px solid #fff;
    transition: all 0.3s;
}

.btn-download-main:hover {
    background-color: #fff;
    color: #409eff;
}

.hero-img {
    margin-top: 60px;
}

.hero-img img {
    max-width: 100%;
    height: auto;
}

.features {
    padding: 100px 0;
}

.feature-item {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 60px;
}

.feature-img img {
    max-width: 100%;
    height: auto;
}

.feature-text h3 {
    font-size: 32px;
    margin-bottom: 20px;
}

.feature-text p {
    font-size: 18px;
    color: #666;
}

footer {
    padding: 40px 0;
    text-align: center;
    background-color: #f5f5f5;
    color: #999;
    font-size: 14px;
}