body {
    background-color: #feffef;
}
.header {
    background-color: #fffef9;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.p1_container{
    width: 90%;
    display: grid;
    margin: 0px auto 0px auto;
}
.p1_left{
    grid-row: 1;
    grid-column: 1;
    text-align: center;
}
.p1_title{
    padding-top: 20px;
    text-align: center;
}
#p1_content{
    padding-top: 10px;
    width: 100%;
    margin: 0 auto;
    text-align: left;
}
#p1_right {
    width: 70%;
    height: auto;
    aspect-ratio: 1/1;
    max-width: 740px;
    margin: 0 auto;
    overflow: hidden;
    grid-row: 2;
    grid-column: 1;
}
.iframe_p1 {
    width: 100%;
    height: 100%;
}

.p2_container{
    width: 90%;
    display: grid;
    margin: 20px auto;
}
#p2_left {
    width: 100%;
    aspect-ratio: 900/840;
    max-width: 900px;
    margin: 20px auto 0px auto;
    overflow: hidden;
    grid-row: 2;
    grid-column: 1;
}
.iframe_p2 {
    width: 100%;
    height: 100%;
}
.p2_right{
    text-align: left;
    grid-row: 1;
    grid-column: 1;
}
.p2_title{
    padding-top: 20px;
    text-align: center;
    width: 100%;
    margin: 0 auto;
}
#p2_content{
    padding-top: 10px;
    width: 100%;
    margin: 0 auto;
}

.p3_bg{
    width: 100%;
    background-image: url('../images/about_p3_bg.png');
    background-repeat: no-repeat;
}
.p3_container{
    display: grid;
    width: 92%;
    margin: 0 auto;
}
.p3_left{
    width: 100%;
    grid-row: 1;
    grid-column: 1;
    display: grid;
    margin: 0 auto;
    text-align: center;
}
.p3_a1{
    grid-row: 1;
    grid-column: 1;
    width: 90vw;
    height: 140px;
    max-width: 500px;
    padding: 10px 70px 0px 20px;
    display: grid;
    place-items: start center;
    margin: 0 auto;
    background: #dff6ea; /* 背景色 */
    border-radius: 30px;
    position: relative;
}
.p3_a2{
    grid-row: 2;
    grid-column: 1;
    width: 90vw;
    height: 140px;
    max-width: 500px;
    padding: 10px 70px 0px 20px;
    margin: 10px auto 0px auto;
    display: grid;
    place-items: start center;
    background: #e8f7fc; /* 背景色 */
    border-radius: 30px;
    position: relative;
}
.p3_a3{
    grid-row: 3;
    grid-column: 1;
    width: 90vw;
    height: 140px;
    max-width: 497px;
    padding: 10px 70px 0px 20px;
    margin: 10px auto 0px auto;
    display: grid;
    place-items: center;
    background: #b5eacf; /* 背景色 */
    border-radius: 30px;
    position: relative;
}
.p3_a4{
    grid-row: 4;
    grid-column: 1;
    width: 90vw;
    height: 140px;
    max-width: 497px;
    padding: 10px 70px 0px 20px;
    margin: 10px auto 0px auto;
    display: grid;
    place-items: start center;
    background: #e6f8ef; /* 背景色 */
    border-radius: 30px;
    position: relative;
}
.p3_a5{
    grid-row: 5;
    grid-column: 1;
    width: 90vw;
    height: 140px;
    max-width: 497px;
    padding: 10px 70px 0px 20px;
    margin: 10px auto 0px auto;
    display: grid;
    place-items: start center;
    background: #c4e7ea; /* 背景色 */
    border-radius: 30px;
    position: relative;
}
#p3_right {
    width: 100%;
    grid-row: 2;
    grid-column: 1;
    aspect-ratio: 520/740;
    max-width: 520px;
    overflow: hidden;
    margin: 0 auto;
}
.iframe_p3 {
    width: 100%;
    height: 100%;
    border: none;
    transform-origin: top left;
}

.p4_container{
    display: grid;
    width: 90%;
    margin: 0px auto 0px auto;
}
.p4_left{
    grid-row: 1;
    grid-column: 1;
}
.p4_title h1{
    font-size: 22px;
}
#p4_content{
    padding-top: 10px;
}
.p4_button{
    width: 70%; 
    max-width: 544px;
    aspect-ratio: 544/90;
    background-image: url('../images/about_p4_btn.png'); 
    margin: 10px auto 30px auto; 
    clear: both;
    background-size: 100% 100%; 
    background-repeat: no-repeat;
    display: grid;
    place-items: center;
    cursor: pointer;
}
.p4_right{
    grid-row: 2;
    grid-column: 1;
    display: grid;
    gap: 0px;
    padding-top: 10px;
}
.p4_a1{
    grid-row: 1;
    grid-column: 1;
    background-image: url("../images/about_p4_1.png");
    width: 90vw;
    background-size: 100% 100%; 
    background-repeat: no-repeat;
    max-width: 402px;
    aspect-ratio: 402/364;
    padding: 200px 50px 20px 20px;
    margin: 0px auto 0px auto;
    display: grid;
    place-items: start center;
    text-align: left;
}
.p4_a2{
    grid-row: 2;
    grid-column: 1;
    background-image: url("../images/about_p4_2.png");
    width: 90vw;
    background-size: 100% 100%; 
    background-repeat: no-repeat;
    max-width: 402px;
    aspect-ratio: 402/364;
    padding: 200px 50px 20px 20px;
    margin: 0px auto 0px auto;
    display: grid;
    place-items: start center;
    text-align: left;
}
.p4_a3{
    grid-row: 3;
    grid-column: 1;
    background-image: url("../images/about_p4_3.png");
    width: 90vw;
    background-size: 100% 100%; 
    background-repeat: no-repeat;
    max-width: 402px;
    aspect-ratio: 402/364;
    padding: 200px 50px 20px 20px;
    margin: 0px auto 0px auto;
    display: grid;
    place-items: start center;
    text-align: left;
}
.p4_a4{
    grid-row: 4;
    grid-column: 1;
    background-image: url("../images/about_p4_4.png");
    width: 90vw;
    background-size: 100% 100%; 
    background-repeat: no-repeat;
    max-width: 402px;
    aspect-ratio: 402/364;
    padding: 200px 50px 20px 20px;
    margin: 0px auto 0px auto;
    display: grid;
    place-items: start center;
    text-align: left;
}

/* 当页面宽度大于等于576时 */
@media (min-width: 576px) {
    .p1_title{
        padding-top: 10px;
    }
    .p3_a1{
        place-items: center;
    }
    .p3_a2{
        place-items: center;
    }
    .p3_a3{
        place-items: center;
        padding: 10px 70px 40px 20px;
    }
    .p3_a4{
        place-items: center;
    }
    .p3_a5{
        place-items: center;
    }
    .p4_title h1{
        font-size: calc(18px + 1.5vw);
    }
}
/* 当页面宽度大于等于992时 */
@media (min-width: 992px) {
    .content {
        padding: 0px 0%;
    }
    .p1_title{
        padding-top: 20px;
    }
    #p1_content{
        padding-top: 30px;
    }
    .p3_left{
        gap: 10px;
    }
    .p3_a1{
        grid-row: 1;
        grid-column: 1;
        width: 100%;
        height: 160px;
        margin-top: 10px;
        padding: 10px 50px 0px auto;
        font-size: 18px;
    }
    .p3_a2{
        grid-row: 1;
        grid-column: 2;
        width: 100%;
        height: 160px;
        margin: 10px auto 0px 0px;
        padding: 10px 50px 0px auto;
        font-size: 18px;
    }
    .p3_a3{
        grid-row: 2 / span 2;
        grid-column: 1;
        width: 100%;
        height: 350px;
        padding: 10px;
        font-size: 18px;
    }
    .p3_a4{
        grid-row: 2;
        grid-column: 2;
        width: 100%;
        height: 160px;
        margin: 10px auto 0px 0px;
        padding: 10px 50px 0px auto;
        font-size: 18px;
    }
    .p3_a5{
        grid-row: 3;
        grid-column: 2;
        width: 100%;
        height: 160px;
        margin: 10px auto 0px 0px;
        padding: 10px 50px 0px auto;
        font-size: 18px;
    }
    .p3_a1 h1{
        font-size: 32px;
    }
    .p3_a2 h1{
        font-size: 32px;
    }
    .p3_a3 h1{
        font-size: 32px;
    }
    .p3_a4 h1{
        font-size: 32px;
    }
    .p3_a5 h1{
        font-size: 32px;
    }
    .p4_right{
        width: 90%;
        margin: 0 auto;
    }
    .p4_a1{
        grid-row: 1;
        grid-column: 1;
    }
    .p4_a2{
        grid-row: 1;
        grid-column: 2;
    }
    .p4_a3{
        grid-row: 2;
        grid-column: 1;
    }
    .p4_a4{
        grid-row: 2;
        grid-column: 2;
    }
}
@media (min-width: 1179px) {
    
}
@media (min-width: 1536px) {
    .p1_container{
        width: 80%;
        margin: 0 auto;
        grid-template-columns: 50% 50%;
    }
    .p1_left{
        grid-row: 1;
        grid-column: 1;
        text-align: left;
    }
    .p1_title{
        padding-top: 30px;
        width: 100%;
        margin: 0px 0px 0px auto;
    }
    #p1_content{
        padding-top: 10px;
        width: 100%;
        margin: 0px 0px 0px auto;
    }
    #p1_right {
        grid-row: 1;
        grid-column: 2;
    }

    .p2_container{
        width: 80%;
        grid-template-columns: 50% 50%;
    }
    #p2_left {
        grid-row: 1;
        grid-column: 1;
        width: 100%;
        margin: 0px 0px 0px auto;
    }
    .p2_right{
        text-align: left;
        grid-row: 1;
        grid-column: 2;
    }
    .p2_title{
        text-align: left;
    }
    .p3_left{
        width: 100%;
        grid-row: 1;
        grid-column: 1;
        margin: 0;
        padding-top: 180px;
    }    
    #p3_right{
        grid-row: 1;
        grid-column: 2;
        width: 80%;
        margin: 0px auto auto 0px;
        height: 740px;
    }
    
    .p4_container{
        padding-top: 40px;
        width: 80%;
        grid-template-columns: 50% 50%;
        gap: 10px;
    }
    .p4_left{
        grid-row: 1;
        grid-column: 1;
        width: 100%;
        margin: 0px 0px 0px auto;
    }
    .p4_title h1{
        font-size: 40px;
    }
    #p4_content{
        padding-top: 10px;
        text-align: left;
    }
    .p4_right{
        grid-row: 1;
        grid-column: 2;
        text-align: left;
        gap: 0px;
        margin: 0px auto 0px 40px;
        padding-top: 0px;
    }
    .p4_a1{
        width: 300px;
        padding: 130px 50px 20px 20px;
        font-size: calc(10px + 0.7vw);
        line-height: 140%;
    }
    .p4_a1 h1{
        font-size: calc(12px + 1.1vw);
        padding-bottom: 10px;
    }
    .p4_a2{
        width: 300px;
        padding: 130px 50px 20px 20px;
        font-size: calc(10px + 0.7vw);
        line-height: 140%;
    }
    .p4_a2 h1{
        font-size: calc(12px + 1.1vw);
        padding-bottom: 10px;
    }
    .p4_a3{
        width: 300px;
        padding: 130px 50px 20px 20px;
        font-size: calc(10px + 0.7vw);
        line-height: 140%;
    }
    .p4_a3 h1{
        font-size: calc(12px + 1.1vw);
        padding-bottom: 10px;
    }
    .p4_a4{
        width: 300px;
        padding: 130px 50px 20px 20px;
        font-size: calc(10px + 0.7vw);
        line-height: 140%;
    }
    .p4_a4 h1{
        font-size: calc(12px + 1.1vw);
        padding-bottom: 10px;
    }
}
@media (min-width: 1920px) {
    .p1_container{
        width: 60%;
    }
    .p2_container{
        width: 60%;
    }
    .p3_left{
        width: 80%;
        margin: 0px 0px 0px auto;
        padding-top: 120px;
        padding-left: 160px;
    }
    .p3_a1{
        width: 497px;
    }
    .p3_a2{
        width: 679px;
    }
    .p3_a3{
        width: 497px;
        height: 376px;
    }
    .p3_a4{
        width: 679px;
    }
    .p3_a5{
        width: 679px;
    }
    #p3_right{
        margin-left: 150px;
    }
    
    .p4_container{
        padding-top: 100px;
        width: 60%;
    }
    .p4_title h1{
        font-size: 44px;
    }
    .p4_right{
        grid-row: 1;
        grid-column: 2;
        text-align: left;
        gap: 0px;
        margin: 0px auto 0px 40px;
        width: 50%;
    }
    .p4_a1{
        width: 402px;
        padding: 170px 50px 20px 20px;
        font-size: calc(12px + 0.7vw);
        line-height: 140%;
    }
    .p4_a1 h1{
        font-size: calc(12px + 1.1vw);
    }
    .p4_a2{
        width: 402px;
        padding: 170px 50px 20px 20px;
        font-size: calc(12px + 0.7vw);
        line-height: 140%;
    }
    .p4_a2 h1{
        font-size: calc(12px + 1.1vw);
    }
    .p4_a3{
        width: 402px;
        padding: 170px 50px 20px 20px;
        font-size: calc(12px + 0.7vw);
        line-height: 140%;
    }
    .p4_a3 h1{
        font-size: calc(12px + 1.1vw);
    }
    .p4_a4{
        width: 402px;
        padding: 170px 50px 20px 20px;
        font-size: calc(12px + 0.7vw);
        line-height: 140%;
    }
    .p4_a4 h1{
        font-size: calc(12px + 1.1vw);
    }
}