.container {
    margin-top: 20px;
    -webkit-box-shadow: 0px 2px 5px rgba(0, 0, 0, 0.13);
    box-shadow: 0px 2px 5px rgba(0, 0, 0, 0.13);
    padding: 20px 16px 20px 16px;
    border: 1px solid #d2e3f0;
    box-sizing: border-box;
    display: flex;
}

.letter-search p {
    font-size: 16px;
    color: #333333;
}

.letter-list {
    display: flex;
    flex-wrap: wrap;
    margin-left: 0;
    /* gap: 35px; */
    flex: 1;
    row-gap: 22px;

    /* 确保容器宽度足够容纳两排 */
}

/* 字母列表 */
/* 分成两排上下对齐 */
.letter-list li {
    width: 32px;
    text-align: center;
    box-sizing: border-box;
    font-size: 18px;
    color: #003382;
    text-align: center;
}

.letter-list li a {
    color: #003382;
    text-decoration: none;
    font-size: 18px;

}

.letter-container .letter-list {
    gap: 22px;
}

.letter-container .letter-list li {
    width: auto;
}

.r_con .letter-item {
    display: flex;
    flex-wrap: wrap;
    gap: 1%;
    margin-top: 20px;
}

.r_con .letter-item .letter-items {
    width: 49.5%;
    box-sizing: border-box;
    border: 1px solid #dce6ea;
    background: #fdfdfd url(../images/letter-itemBg.png) no-repeat left bottom /cover;
    padding: 23px 20px;
    margin-bottom: 20px;
}

.r_con .letter-item .letter-items .a {
    display: flex;
    flex-wrap: wrap;gap: 18px;
}

.r_con .letter-item .letter-items .img1 {
   
    width: 104px;
    height: 142px;
    overflow: hidden;
}

.r_con .letter-item .letter-items .img1 img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.r_con .letter-item .letter-items .con {flex: 1}

.r_con .letter-item .letter-items .title {
    font-size: 22px;
    color: #333333;
    font-weight: bold;

}
.r_con .letter-item .letter-items .title span {
 font-size: 16px;
    color: #333333;     font-weight: normal;
}

.r_con .letter-item .letter-items .subtitle {
    font-size: 16px;
    color: #333;
    margin-top: 10px;
    display: block;
    margin-bottom: 15px;
}

.r_con .letter-item .letter-items .con-rtl p.email,
.r_con .letter-item .letter-items .con-rtl p.xuexi
 {
    font-size: 16px;
    color: #333;
    padding-left: 35px;
    line-height: 24px;
    background: no-repeat left center;
    background-size: 24px;
    margin-bottom: 10px;
}
.r_con .letter-item .letter-items .con-rtl .yjfx{
font-size: 16px;
    color: #333;
background: no-repeat left top;
    background-size: 24px; padding-left: 35px;
line-height: 24px;
} 
.r_con .letter-item .letter-items .con-rtl .yjfx a {
 margin-bottom: 10px;
    font-size: 16px;
    color: #003381;
}
.r_con .letter-item .letter-items .con-rtl p.email {
    background-image: url(../images/letter-email.png);
}

.r_con .letter-item .letter-items .con-rtl p.xuexi {
    background-image: url(../images/letter-xuexi.png);
}

.r_con .letter-item .letter-items .con-rtl .yjfx {
    background-image: url(../images/letter-yjfx.png);
}

.r_con .letter-item .letter-items .con-rtl ul {
    padding-left: 35px;
}

.r_con .letter-item .letter-items .con-rtl .research a {
   /* padding-left: 20px;
    background: url(../images/letter-checked.png) no-repeat left center;
    background-size: 11px;*/
    margin-bottom: 10px;
    font-size: 16px;
    color: #003381;
    /*text-decoration: underline;
    display: block;*/
}

@media screen and (max-width: 1200px) {
    .r_con .letter-item .letter-items {
        padding: 23px 10px;
    }

}

@media screen and (max-width: 1080px) {
    .r_con .letter-item .letter-items {
        width: 100%;
    }
}

@media screen and (max-width: 910px) {
    .l_nav {
        width: 277px;
        position: static;
        display: none;
        margin-top: 0;
    }
    .r_con {
        width: 100%;
        padding-left: 0;
        margin-top: 22px;
    }
    .r_con .letter-item .letter-items {
        width: 49%;
    }
.r_con .letter-item .letter-items .con-rtl .yjfx,.r_con .letter-item .letter-items .con-rtl .yjfx a,.r_con .letter-item .letter-items .con-rtl p.email, .r_con .letter-item .letter-items .con-rtl p.xuexi{font-size : 14px;}
.r_con .letter-item .letter-items .img1 {margin-right: 14px;}
}

@media screen and (max-width: 700px) {


   .r_con .letter-item .letter-items {
        width: 100%;
    }


}
@media screen and (max-width: 500px) {
    .r_con .letter-item .letter-items .a {
        flex-wrap: wrap;
    }

    .r_con .letter-item .letter-items .con {
        width: 100%;
        margin-top: 0;
    }

    .r_con .letter-item .letter-items .img1 {
                width: 125px;
        height: 160px;
    }
}