body {
    margin: 0 auto;
    font-family: "微软雅黑";
    width: 100%;
    font-size: 14px;
    background-color: #f5f6f7;
    color: #454545;
}

* {
    margin: 0;
    padding: 0;
}
.content{width:900px; margin:0 auto}
.title {
    width:100%;
    height: 45px;
    line-height: 45px;
    text-align: center;
    font-size: 24px;
    font-weight: bold; color:red;
}
.img{width:100%; padding:10px 0; text-align:center}
    .img img{width:100%}
    .text {
        width: 100%;
        line-height: 35px;
        font-size: 16px
    }
@media screen and (max-width:768px) {
    .content {
        width: 96%;
        margin: 0 auto
    }




}

.tab-section {
    background: white;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    overflow: hidden;
    margin-bottom: 40px;
    transition: transform 0.3s ease;
}

    .tab-section:hover {
        transform: translateY(-5px);
    }

.section-title {
    background: linear-gradient(90deg, #3498db, #2c3e50);
    color: white;
    padding: 20px;
    font-size: 1.5rem;
    /*display: flex;*/
    align-items: center; text-align:center;
}

    .section-title i {
        margin-right: 12px;
        font-size: 1.8rem;
    }

.tabs-container {
    padding: 30px;
}

/* 卡片风格 */
.card-tabs .tab-headers {
    display: flex;
    gap: 10px;
    margin-bottom: 25px;
    justify-content: center; /* 关键属性：水平居中 */
}

.card-tabs .tab-header {
    padding: 15px 30px;
    cursor: pointer;
    font-weight: 600;
    background: #f8f9fa;
    border-radius: 8px;
    color: #000000;
    transition: all 0.3s ease; font-size:16px;
    /*box-shadow: 0 2px 5px rgba(0,0,0,0.05);*/
}

    .card-tabs .tab-header.active {
        background: #d42002;
        color: white;
        /* transform: translateY(-3px);*/
        /*box-shadow: 0 5px 15px rgba(52, 152, 219, 0.4);*/
    }

    .card-tabs .tab-header:hover:not(.active) {
        background: #e3f2fd;
    }



/* 内容区域公用样式 */
.tab-content {
    display: none;
    animation: fadeIn 0.5s ease;
    line-height: 1.8;
    color: #555;
}

    .tab-content.active {
        display: block;
    }

    .tab-content h3 {
        color: #2c3e50;
        margin-bottom: 20px;
        font-size: 1.8rem;
    }

    .tab-content p {
        margin-bottom: 15px;
    }

.feature-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
    margin-top: 20px;
}

.feature-item {
    display: flex;
    align-items: flex-start;
    padding: 10px;
    background: #f8f9fa;
    border-radius: 8px;
}

    .feature-item i {
        color: #3498db;
        font-size: 1.2rem;
        margin-right: 10px;
        margin-top: 3px;
    }

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.mobile-note {
    background: #fff9c4;
    padding: 15px;
    border-radius: 8px;
    margin-top: 30px;
    display: flex;
    align-items: center;
    border-left: 4px solid #ffd600;
}

    .mobile-note i {
        color: #f57c00;
        font-size: 1.5rem;
        margin-right: 15px;
    }

    .mobile-note p {
        color: #5d4037;
        font-size: 0.95rem;
    }

footer {
    text-align: center;
    margin-top: 40px;
    color: #7f8c8d;
    font-size: 0.9rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .tab-headers {
        flex-wrap: wrap;
    }

    .tab-header {
        flex: 1;
        min-width: 120px;
        text-align: center;
    }

    .feature-list {
        grid-template-columns: 1fr;
    }

    h1 {
        font-size: 2.2rem;
    }
}

@media (max-width: 480px) {
    .tab-header {
        min-width: 100%;
        margin-bottom: 5px;
    }

    .card-tabs .tab-headers {
        flex-direction: column;
    }
}
@media (max-width: 480px) {
    .card-tabs .tab-header {
        padding: 15px 0px;
        
    }
}