html, body {
    font-family: "Source Han Sans CN", -apple-system, "Microsoft YaHei UI", "微软雅黑", sans-serif;
    display: -webkit-flex;
    display: -ms-flexbox;
    display: flex;
    align-items: center;
    line-height: 1.6;
    width: 100%;
}

a {
    color: #343a40;
    text-decoration: none;
    border-bottom: 1px solid #5490ea99;
    transition: ease 0.3s;
}

a:hover {
    color: #828486;
    border-bottom: 1px solid #5490ea55;
}

table a {
    border-bottom-color: transparent;
}

h1 {
    font-weight: lighter;
    font-size: 48px;
    line-height: 1.3;
}

h2 {
    font-weight: lighter;
    font-size: 36px;
    line-height: 1.3;
}

h3 {
    font-size: 32px;
}

small {
    font-weight: lighter;
    font-size: smaller;
    color: gray;
}

hr {
    margin-top: 1rem;
    margin-bottom: 1rem;
    border: 0;
    border-top: 1px solid rgba(0, 0, 0, 0.1);
}

li {
    padding-top: 5px;
    padding-bottom: 5px;
}

#main {
    max-width: 88%;
    padding-top: 100px;
}

#logo-text {
    line-height: 1;
}

#footer {
    font-size: 12px;
    color: rgb(128, 128, 128);
}

#download-page {
    position: fixed;
    display: none;
    align-items: center;
    justify-content: center;
    height: 100%;
    width: 100%;
    top: 0;
    left: 0;
    background-color: white;
    z-index: 999;
}

#download-container {
    width: 60%;
    height: 30%;
    transform: translateY(-25%);
}

#download-tips {
    font-size: xx-small;
    color: grey;
}

#page-close {
    position: fixed;
    top: 8px;
    right: 8px;
}

.row {
    display: flex;
    align-items: center;
}

.pic {
    max-width: 100%;
    box-shadow: 1px 1px 6px #ccc;
}

.bold {
    font-weight: bold;
    font-size: larger;
}

.text-left {
    text-align: left;
}

.text-center {
    text-align: center;
}

.text-right {
    text-align: right;
}

.padding-left {
    padding-left: 30px !important;
}

.padding-right {
    padding-right: 30px !important;
}

.btn, #page-close a {
    border-bottom: initial;
}

@media (max-width: 768px) {
    #main {
        padding-top: 0;
    }

    #main-pic {
        margin-top: 20px;
    }

    h1 {
        font-size: 36px;
    }

    h2 {
        font-size: 28px;
    }

    body {
        line-height: 1.8;
    }

    .padding-left, .padding-right {
        padding-left: 15px !important;
        padding-right: 15px !important;
    }

    .btn-lg {
        font-size: smaller !important;
        width: 100%;
    }
}

/*!
 * Bootstrap v4.6.1 (https://getbootstrap.com/)
 * Copyright 2011-2021 The Bootstrap Authors
 * Copyright 2011-2021 Twitter, Inc.
 * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)
 */
html {
    box-sizing: border-box;
    -ms-overflow-style: scrollbar;
}

*,
*::before,
*::after {
    box-sizing: inherit;
}

.container,
.container-fluid,
.container-sm,
.container-md,
.container-lg,
.container-xl {
    width: 100%;
    padding-right: 15px;
    padding-left: 15px;
    margin-right: auto;
    margin-left: auto;
}

@media (min-width: 576px) {
    .container, .container-sm {
        max-width: 540px;
    }
}

@media (min-width: 768px) {
    .container, .container-sm, .container-md {
        max-width: 720px;
    }
}

@media (min-width: 992px) {
    .container, .container-sm, .container-md, .container-lg {
        max-width: 960px;
    }
}

@media (min-width: 1200px) {
    .container, .container-sm, .container-md, .container-lg, .container-xl {
        max-width: 1140px;
    }
}

.row {
    display: -ms-flexbox;
    display: flex;
    -ms-flex-wrap: wrap;
    flex-wrap: wrap;
    margin-right: -15px;
    margin-left: -15px;
}

.col-1, .col-2, .col-3, .col-4, .col-5, .col-6, .col-7, .col-8, .col-9, .col-10, .col-11, .col-12, .col,
.col-auto, .col-sm-1, .col-sm-2, .col-sm-3, .col-sm-4, .col-sm-5, .col-sm-6, .col-sm-7, .col-sm-8, .col-sm-9, .col-sm-10, .col-sm-11, .col-sm-12, .col-sm,
.col-sm-auto, .col-md-1, .col-md-2, .col-md-3, .col-md-4, .col-md-5, .col-md-6, .col-md-7, .col-md-8, .col-md-9, .col-md-10, .col-md-11, .col-md-12, .col-md,
.col-md-auto, .col-lg-1, .col-lg-2, .col-lg-3, .col-lg-4, .col-lg-5, .col-lg-6, .col-lg-7, .col-lg-8, .col-lg-9, .col-lg-10, .col-lg-11, .col-lg-12, .col-lg,
.col-lg-auto, .col-xl-1, .col-xl-2, .col-xl-3, .col-xl-4, .col-xl-5, .col-xl-6, .col-xl-7, .col-xl-8, .col-xl-9, .col-xl-10, .col-xl-11, .col-xl-12, .col-xl,
.col-xl-auto {
    position: relative;
    width: 100%;
    padding-right: 15px;
    padding-left: 15px;
}

.col {
    -ms-flex-preferred-size: 0;
    flex-basis: 0;
    -ms-flex-positive: 1;
    flex-grow: 1;
    max-width: 100%;
}

.row-cols-1 > * {
    -ms-flex: 0 0 100%;
    flex: 0 0 100%;
    max-width: 100%;
}

.row-cols-2 > * {
    -ms-flex: 0 0 50%;
    flex: 0 0 50%;
    max-width: 50%;
}

.row-cols-3 > * {
    -ms-flex: 0 0 33.333333%;
    flex: 0 0 33.333333%;
    max-width: 33.333333%;
}

.row-cols-4 > * {
    -ms-flex: 0 0 25%;
    flex: 0 0 25%;
    max-width: 25%;
}

.row-cols-5 > * {
    -ms-flex: 0 0 20%;
    flex: 0 0 20%;
    max-width: 20%;
}

.row-cols-6 > * {
    -ms-flex: 0 0 16.666667%;
    flex: 0 0 16.666667%;
    max-width: 16.666667%;
}

.col-auto {
    -ms-flex: 0 0 auto;
    flex: 0 0 auto;
    width: auto;
    max-width: 100%;
}

.col-1 {
    -ms-flex: 0 0 8.333333%;
    flex: 0 0 8.333333%;
    max-width: 8.333333%;
}

.col-2 {
    -ms-flex: 0 0 16.666667%;
    flex: 0 0 16.666667%;
    max-width: 16.666667%;
}

.col-3 {
    -ms-flex: 0 0 25%;
    flex: 0 0 25%;
    max-width: 25%;
}

.col-4 {
    -ms-flex: 0 0 33.333333%;
    flex: 0 0 33.333333%;
    max-width: 33.333333%;
}

.col-5 {
    -ms-flex: 0 0 41.666667%;
    flex: 0 0 41.666667%;
    max-width: 41.666667%;
}

.col-6 {
    -ms-flex: 0 0 50%;
    flex: 0 0 50%;
    max-width: 50%;
}

.col-7 {
    -ms-flex: 0 0 58.333333%;
    flex: 0 0 58.333333%;
    max-width: 58.333333%;
}

.col-8 {
    -ms-flex: 0 0 66.666667%;
    flex: 0 0 66.666667%;
    max-width: 66.666667%;
}

.col-9 {
    -ms-flex: 0 0 75%;
    flex: 0 0 75%;
    max-width: 75%;
}

.col-10 {
    -ms-flex: 0 0 83.333333%;
    flex: 0 0 83.333333%;
    max-width: 83.333333%;
}

.col-11 {
    -ms-flex: 0 0 91.666667%;
    flex: 0 0 91.666667%;
    max-width: 91.666667%;
}

.col-12 {
    -ms-flex: 0 0 100%;
    flex: 0 0 100%;
    max-width: 100%;
}

@media (min-width: 768px) {
    .col-md {
        -ms-flex-preferred-size: 0;
        flex-basis: 0;
        -ms-flex-positive: 1;
        flex-grow: 1;
        max-width: 100%;
    }

    .row-cols-md-1 > * {
        -ms-flex: 0 0 100%;
        flex: 0 0 100%;
        max-width: 100%;
    }

    .row-cols-md-2 > * {
        -ms-flex: 0 0 50%;
        flex: 0 0 50%;
        max-width: 50%;
    }

    .row-cols-md-3 > * {
        -ms-flex: 0 0 33.333333%;
        flex: 0 0 33.333333%;
        max-width: 33.333333%;
    }

    .row-cols-md-4 > * {
        -ms-flex: 0 0 25%;
        flex: 0 0 25%;
        max-width: 25%;
    }

    .row-cols-md-5 > * {
        -ms-flex: 0 0 20%;
        flex: 0 0 20%;
        max-width: 20%;
    }

    .row-cols-md-6 > * {
        -ms-flex: 0 0 16.666667%;
        flex: 0 0 16.666667%;
        max-width: 16.666667%;
    }

    .col-md-auto {
        -ms-flex: 0 0 auto;
        flex: 0 0 auto;
        width: auto;
        max-width: 100%;
    }

    .col-md-1 {
        -ms-flex: 0 0 8.333333%;
        flex: 0 0 8.333333%;
        max-width: 8.333333%;
    }

    .col-md-2 {
        -ms-flex: 0 0 16.666667%;
        flex: 0 0 16.666667%;
        max-width: 16.666667%;
    }

    .col-md-3 {
        -ms-flex: 0 0 25%;
        flex: 0 0 25%;
        max-width: 25%;
    }

    .col-md-4 {
        -ms-flex: 0 0 33.333333%;
        flex: 0 0 33.333333%;
        max-width: 33.333333%;
    }

    .col-md-5 {
        -ms-flex: 0 0 41.666667%;
        flex: 0 0 41.666667%;
        max-width: 41.666667%;
    }

    .col-md-6 {
        -ms-flex: 0 0 50%;
        flex: 0 0 50%;
        max-width: 50%;
    }

    .col-md-7 {
        -ms-flex: 0 0 58.333333%;
        flex: 0 0 58.333333%;
        max-width: 58.333333%;
    }

    .col-md-8 {
        -ms-flex: 0 0 66.666667%;
        flex: 0 0 66.666667%;
        max-width: 66.666667%;
    }

    .col-md-9 {
        -ms-flex: 0 0 75%;
        flex: 0 0 75%;
        max-width: 75%;
    }

    .col-md-10 {
        -ms-flex: 0 0 83.333333%;
        flex: 0 0 83.333333%;
        max-width: 83.333333%;
    }

    .col-md-11 {
        -ms-flex: 0 0 91.666667%;
        flex: 0 0 91.666667%;
        max-width: 91.666667%;
    }

    .col-md-12 {
        -ms-flex: 0 0 100%;
        flex: 0 0 100%;
        max-width: 100%;
    }
}

.btn {
    display: inline-block;
    font-weight: 400;
    color: #212529;
    text-align: center;
    vertical-align: middle;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    background-color: transparent;
    border: 1.4px solid transparent;
    padding: 0.375rem 0.75rem;
    font-size: 1rem;
    line-height: 1.5;
    transition: color 0.15s ease-in-out, background-color 0.15s ease-in-out, border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}

@media (prefers-reduced-motion: reduce) {
    .btn {
        transition: none;
    }
}

.btn:hover {
    color: #212529;
    text-decoration: none;
}

.btn:focus, .btn.focus {
    outline: 0;
    box-shadow: 0 0 0 0.2rem rgba(0, 123, 255, 0.25);
}

.btn:not(:disabled):not(.disabled) {
    cursor: pointer;
}


.btn-outline-primary {
    color: #5490ea;
    border-color: #5490ea;
}

.btn-outline-primary:hover {
    color: #fff;
    background-color: #5490ea;
    border-color: #5490ea;
}

.btn-outline-primary:focus, .btn-outline-primary.focus {
    box-shadow: 0 0 0 0.2rem rgba(0, 123, 255, 0.5);
}

.btn-outline-primary:not(:disabled):not(.disabled):active, .btn-outline-primary:not(:disabled):not(.disabled).active,
.show > .btn-outline-primary.dropdown-toggle {
    color: #fff;
    background-color: #5490ea;
    border-color: #5490ea;
}

.btn-outline-primary:not(:disabled):not(.disabled):active:focus, .btn-outline-primary:not(:disabled):not(.disabled).active:focus,
.show > .btn-outline-primary.dropdown-toggle:focus {
    box-shadow: 0 0 0 0.2rem rgba(0, 123, 255, 0.5);
}

.btn-danger {
    color: #fff;
    background-color: #dc3545;
    border-color: #dc3545;
}

.btn-danger:hover {
    color: #fff;
    background-color: #c82333;
    border-color: #bd2130;
}

.btn-danger:focus, .btn-danger.focus {
    color: #fff;
    background-color: #c82333;
    border-color: #bd2130;
    box-shadow: 0 0 0 0.2rem rgba(225, 83, 97, 0.5);
}

.btn-danger:not(:disabled):not(.disabled):active, .btn-danger:not(:disabled):not(.disabled).active,
.show > .btn-danger.dropdown-toggle {
    color: #fff;
    background-color: #bd2130;
    border-color: #b21f2d;
}

.btn-danger:not(:disabled):not(.disabled):active:focus, .btn-danger:not(:disabled):not(.disabled).active:focus,
.show > .btn-danger.dropdown-toggle:focus {
    box-shadow: 0 0 0 0.2rem rgba(225, 83, 97, 0.5);
}

.btn-lg, .btn-group-lg > .btn {
    padding: 0.5rem 1rem;
    font-size: 1.4rem;
    line-height: 1.5;
}