body {
    margin: 0;
    padding: 0;
    font-family: "Helvetica Neue", Helvetica, "PingFang SC", "Microsoft YaHei", sans-serif;
    background-color: #f5f6f8;
    color: #333;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}
.understandcontainer {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px 10px;
    box-sizing: border-box;
}
.understandheader {
    background-color: #00a854;
    border-bottom: 2px solid #008243;
    position: sticky;
    top: 0;
    z-index: 999;
}
.understandheader .understandinner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
    height: 56px;
}
.understandlogo img {
    height: 24px;
    vertical-align: middle;
    filter: brightness(0) invert(1);
}
.understandnav {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: 20px;
}
.understandnav li a {
    color: #d1f4df;
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: color 0.2s;
}
.understandnav li a:hover, .understandnav li a.understandactive {
    color: #ffffff;
    border-bottom: 2px solid #ffffff;
    padding-bottom: 16px;
}
.understandnoticebar {
    background-color: #ffffff;
    border: 1px solid #e3e4e6;
    padding: 10px 15px;
    margin: 10px auto 20px;
    border-radius: 4px;
    font-size: 13px;
    color: #666;
    display: flex;
    align-items: center;
}
.understandnoticebar::before {
    content: "公告";
    background-color: #00a854;
    color: #fff;
    padding: 2px 6px;
    font-size: 11px;
    border-radius: 2px;
    margin-right: 10px;
}
.understandsectitle {
    font-size: 15px;
    font-weight: bold;
    color: #111;
    margin: 25px 0 15px;
    border-left: 3px solid #00a854;
    padding-left: 10px;
    text-transform: uppercase;
}
.understandgridone {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 15px;
    margin-bottom: 25px;
}
.understandoneleft, .understandonemid, .understandoneright {
    background: #ffffff;
    border: 1px solid #e3e4e6;
    border-radius: 4px;
    padding: 15px;
}
.understandonetitle {
    font-size: 13px;
    font-weight: bold;
    color: #00a854;
    border-bottom: 1px solid #e3e4e6;
    padding-bottom: 10px;
    margin-bottom: 10px;
}
.understandonerow {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 0;
    border-bottom: 1px dashed #f0f0f0;
}
.understandonerow:last-child {
    border-bottom: none;
}
.understandonerow img {
    width: 24px;
    height: 24px;
    object-fit: cover;
    border-radius: 2px;
    margin-right: 10px;
}
.understandonename {
    font-size: 12px;
    color: #333;
    text-decoration: none;
    flex-grow: 1;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.understandoneprice {
    color: #00a854;
    font-weight: bold;
}
.understandgridmain {
    display: grid;
    grid-template-columns: 2.8fr 1fr;
    gap: 20px;
    margin-bottom: 25px;
}
.understandleftcol, .understandrightcol {
    background: #ffffff;
    border: 1px solid #e3e4e6;
    border-radius: 4px;
    padding: 15px;
}
.understandtablehead {
    display: flex;
    justify-content: space-between;
    padding: 8px 10px;
    background: #f7f9fa;
    border-bottom: 1px solid #e3e4e6;
    font-size: 11px;
    color: #888;
    font-weight: bold;
}
.understandtablerow {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 10px;
    border-bottom: 1px dashed #f0f0f0;
}
.understandtablerow:last-child {
    border-bottom: none;
}
.understandtableleft {
    display: flex;
    align-items: center;
    gap: 10px;
    overflow: hidden;
}
.understandtableleft img {
    width: 24px;
    height: 24px;
    object-fit: cover;
    border-radius: 2px;
    flex-shrink: 0;
}
.understandtablename {
    font-size: 13px;
    color: #333;
    text-decoration: none;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.understandtablename:hover {
    color: #00a854;
}
.understandtableright {
    display: flex;
    align-items: center;
    gap: 20px;
    flex-shrink: 0;
}
.understandtableprice {
    color: #00a854;
    font-weight: bold;
    font-size: 13px;
}
.understandtablebtn {
    background: #00a854;
    color: #fff;
    font-size: 11px;
    padding: 3px 8px;
    border-radius: 2px;
    text-decoration: none;
}
.understandrankitem {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    padding: 8px 0;
    border-bottom: 1px dashed #f0f0f0;
}
.understandrankitem:last-child {
    border-bottom: none;
}
.understandranknum {
    background: #00a854;
    color: #fff;
    font-size: 11px;
    width: 18px;
    height: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 2px;
}
.understandranktext {
    font-size: 12px;
    color: #555;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.understandpillbar {
    background: #ffffff;
    border: 1px solid #e3e4e6;
    padding: 12px 15px;
    border-radius: 4px;
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 25px;
}
.understandpilltitle {
    font-size: 11px;
    font-weight: bold;
    color: #00a854;
    background: #d1f4df;
    padding: 2px 6px;
    border-radius: 2px;
    flex-shrink: 0;
}
.understandpilllinks {
    display: flex;
    gap: 12px;
    overflow-x: auto;
    white-space: nowrap;
    font-size: 12px;
}
.understandpilllinks a {
    color: #555;
    text-decoration: none;
}
.understandpilllinks a:hover {
    color: #00a854;
}
.understanddetailwrap {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 20px;
    margin-top: 20px;
}
.understandcard {
    background: #ffffff;
    border: 1px solid #e3e4e6;
    border-radius: 4px;
    padding: 20px;
}
.understandprodtitle {
    font-size: 20px;
    font-weight: bold;
    color: #111;
    margin-bottom: 12px;
}
.understandmeta {
    display: flex;
    gap: 15px;
    font-size: 12px;
    color: #888;
    border-bottom: 1px dashed #e3e4e6;
    padding-bottom: 10px;
    margin-bottom: 20px;
}
.understandfield {
    margin-bottom: 15px;
    display: flex;
    align-items: center;
}
.understandfield label {
    width: 100px;
    font-size: 13px;
    color: #555;
}
.understandfield input, .understandfield select {
    flex: 1;
    height: 38px;
    border: 1px solid #e3e4e6;
    border-radius: 4px;
    padding: 0 10px;
    outline: none;
    box-sizing: border-box;
}
.understandfield input:focus {
    border-color: #00a854;
}
.understandbuybtn {
    width: 100%;
    height: 44px;
    background: #00a854;
    color: #fff;
    border: none;
    border-radius: 4px;
    font-size: 14px;
    font-weight: bold;
    cursor: pointer;
    transition: background 0.2s;
}
.understandbuybtn:hover {
    background: #008243;
}
.understandfooter {
    background: #1a1a1a;
    border-top: 3px solid #00a854;
    padding: 30px 0;
    text-align: center;
    margin-top: 40px;
}
.understandfooterlinks {
    margin-bottom: 12px;
}
.understandfooterlinks a {
    color: #bbb;
    text-decoration: none;
    font-size: 13px;
    margin: 0 10px;
}
.understandfooterlinks a:hover {
    color: #ffffff;
}
.understandcopyright {
    color: #777;
    font-size: 11px;
}
.understandorderbox {
    background: #ffffff;
    border: 1px solid #e3e4e6;
    border-radius: 4px;
    padding: 15px;
    margin-bottom: 12px;
}
.understandkami {
    color: #2fba2f;
    font-weight: bold;
}
@media (max-width: 768px) {
    .understandgridone { grid-template-columns: 1fr; }
    .understandgridmain { grid-template-columns: 1fr; }
    .understanddetailwrap { grid-template-columns: 1fr; }
}