.index_banner {
    max-height: 450px;
    width: 100%;
    background-size: cover;
    display: flex;
    position: relative;
    overflow: hidden;
    justify-content: center;
    align-items: center;
}

/* .index_banner:hover .index_banner_img {
    animation: wave 0.5s linear 0s infinite;
} */

.index_banner .content,.index_banner .inner_banner_img_back {
    position: absolute;
    display: flex;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    align-items: center;
    justify-content: center;
    flex-direction: column;
}

.index_banner .content h2 {
    transform: translateY(20%);
    word-spacing: 0.2em;
}

.index_banner .banner_title {
    color: #00a1e9;
}

.index_banner .inner_banner_img_back img {
    width: 18%;
}

.index_banner .inner_banner_img_back.copy img {
    animation: heart 3s linear 0s infinite;
}

.index_banner .index_banner_img {
    opacity: 0.5;
}

section.main {
    display: flex;
    font-family: 'HarmonyOS Sans SC', 'microsoft yahei', sans-serif;
    margin-top: 25px;
    margin-bottom: 80px;
}

.slide_nav_main {
    padding: 10px 6px 100px 4px;
    border: 1px solid #efefef;
    border-radius: 3px;
    width: 280px;
    font-size: 17px;
    line-height: 1.7em;
    color: #828383;
    box-shadow: 0 0 2px #dddddd;
}

.slide_nav_main>li {
    padding-left: 24px;
}

.slide_nav_main>li>a {
    font-weight: bold;
    color: #d7d7d7;
}

.slide_nav_main h4,
.slide_nav_main>li {
    margin-top: 8px;
}

.slide_nav_main a:hover {
    color: #00a1e9;
}

.slide_nav_main h4.title {
    color: #828282;
    margin-right: -20px;
}

.slide_nav_main li.active>h4 {
    background-color: #36b7f5;
    color: #ffffff;
    border-radius: 0 1px 1px 0;
    font-weight: initial;
    margin-left: -22px;
}
.slide_nav_main li.active>h4::before {
    top: 0;
    content: "";
    width: 0;
    height: 0;
    border: 5px solid;
    display: inline-block;
    border-color: rgba(0,0,0,0) rgba(0,0,0,0) rgba(0,0,0,0) #ffffff;
    margin: 0 2px 0 10px;
}

.product_block {
    margin-left: 35px;
}

.product_block hr {
    border-width: 1px;
    border-style: solid;
    color: #eeeeee;
    margin: 0px 0px;
}

.product_block>div>h3 {
    margin-bottom: 1.5%;
    margin-top: 3%;
    font-weight: initial;
}

.product_block>div:first-child>h3 {
    margin-top: 0;
}

.product_list {
    display: flex;
    flex-wrap: wrap;
}

.product_list .product {
    width: 25%;
}

.product_info {
    margin: 20px 20px;
    background: #fbfbfb;
    border-radius: 5px;
    border: 1px solid #f3f3f3;
}

.product_info img {
    padding: 10px;
    width: calc(100% - 20px);
}

.product_list .product p {
    text-align: center;
    margin-top: 20px;
    padding-bottom: 20px;
    font-size: 16px;
    font-weight: bold;
}

.product_list .product .product_info:hover {
    color: #00a1e9;
    border-color: #e1e1e1;
    box-shadow: inset 1px 1px 10px #aaaaaa;
}

@media (max-width: 1200px) {
    .slide_nav_main {
        width: 230px;
        font-size: 14px;
    }
    .pro_per_list {
        font-size: .6em!important;
    }
}

@media screen and (min-width: 990px) {
    .index_banner .content {
        font-size: 1.5em;
    }
    .product_list {
        display: flex;
        flex-wrap: wrap;
        margin-left: -18px;
        width: calc(100% + 18px);
    }
}

@media (min-width: 480px) and (max-width: 767px) {
    section.main {
        width: auto;
        margin: auto;
    }
}

@media (min-width: 510px) and (max-width: 990px) {
    .product_list .product {
        width: 33.33333333%;
        font-size: 12px;
        transform: translateX(-10px);
    }
    .product_list .product .product_info {
        margin-right: 0;
    }
    h3 {
        font-size: 1.5em;
        line-height: 2em;
    }
    .index_banner .content {
        font-size: 1.3em;
    }
    .index_banner .content h2 {
        transform: translateY(40%);
    }
    .product_block {
        margin-left: 25px;
    }
}

@media screen and (max-width: 767px) {
    /* .product_list .product {
        width: 50%;
    } */
    .slide_nav {
        display: none;
    }
    .product_block {
        margin-left: 0;
    }
}

@media screen and (max-width: 510px) {
    .product_list .product {
        width: 50%;
    }
    .product_list .product:nth-child(2n-1) .product_info {
        margin-left: 0;
        margin-right: 18px;
    }
    .product_list .product:nth-child(2n) .product_info {
        margin-right: 0;
    }
    h3 {
        font-size: 1.5em;
        line-height: 2em;
    }
    .index_banner .content h2 {
        transform: translateY(10%);
    }
}

@keyframes heart {
    0%   {width: 18%; opacity: 1;}
    20%   {width: 19%; opacity: 0.8;}
    40%   {width: 21%; opacity: 0.6;}
    50%   {width: 23%; opacity: 0.4;}
    80%   {width: 25%; opacity: 0.2;}
    100%   {width: 26%; opacity: 0;}
}

@keyframes toTop {
    0%   {transform: translateY(200px); opacity: 0.2;}
    25%  {transform: translateY(120px); opacity: 0.4;}
    50%  {transform: translateY(80px); opacity: 0.6;}
    75%  {transform: translateY(40px); opacity: 0.8;}
    100%  {transform: translateY(0px); opacity: 1;}
}

@keyframes wave {
    0%   {transform: rotate3d(1, 1, 0, 10deg);}
    25%  {transform: rotate3d(1, -1, 0, 10deg);}
    50%  {transform: rotate3d(1, 1, 0, 10deg);}
    75%  {transform: rotate3d(1, -1, 0, 10deg);}
    100%  {transform: rotate3d(1, 1, 0, 10deg);}
}