/* ==========================================================
   记应收操作说明手册 /help/manual/
   依赖：/css/default.css（公共头尾） + 本文件
   注意：default.css 里 body 的 font-size 为 29px（站点视觉体系），
        本页在 .mh_body 内重置为 16px，避免正文过大。
   ========================================================== */

/* ---------- 首屏 ---------- */
.mh_hero{
    background: -webkit-linear-gradient(135deg, #1b6fc9 0%, #08b2f2 100%);
    background: linear-gradient(135deg, #1b6fc9 0%, #08b2f2 100%);
    color: #ffffff;
    padding: 44px 0 36px;
}
.mh_hero_inner{
    width: 1024px;
    margin: 0 auto;
}
.mh_hero_title{
    margin: 0 0 12px;
    font-size: 34px;
    line-height: 1.35;
    font-weight: 600;
    letter-spacing: .5px;
}
.mh_hero_desc{
    margin: 0 0 22px;
    font-size: 15px;
    line-height: 1.7;
    color: rgba(255,255,255,.88);
}
.mh_hero_desc b{
    font-weight: 600;
    color: #ffffff;
}

/* 搜索框 */
.mh_hero_search{
    position: relative;
    max-width: 560px;
    margin-bottom: 20px;
}
.mh_hero_search svg{
    position: absolute;
    left: 14px;
    top: 50%;
    width: 18px;
    height: 18px;
    margin-top: -9px;
    fill: #9aa7b8;
    pointer-events: none;
}
.mh_hero_search input{
    width: 100%;
    height: 46px;
    padding: 0 40px 0 42px;
    border: 0;
    border-radius: 23px;
    background: #ffffff;
    color: #2c3e50;
    font-size: 15px;
    outline: none;
    -webkit-appearance: none;
    appearance: none;
    box-shadow: 0 6px 18px rgba(11,50,90,.16);
}
.mh_hero_search input::-webkit-search-cancel-button{ display: none; }
.mh_hero_search input::placeholder{ color: #a8b3c2; }
.mh_search_clear{
    position: absolute;
    right: 8px;
    top: 50%;
    width: 30px;
    height: 30px;
    margin-top: -15px;
    border: 0;
    border-radius: 50%;
    background: #eef2f7;
    color: #7b8798;
    font-size: 18px;
    line-height: 1;
    cursor: pointer;
}
.mh_search_clear:hover{ background: #e2e8f0; color: #4a5568; }

/* 快速跳转 */
.mh_hero_quick{
    font-size: 13px;
    line-height: 2.1;
    color: rgba(255,255,255,.8);
}
.mh_hero_quick a{
    display: inline-block;
    margin: 0 6px 6px 0;
    padding: 1px 11px;
    border-radius: 12px;
    background: rgba(255,255,255,.16);
    color: #ffffff;
    -webkit-transition: background .18s;
    transition: background .18s;
}
.mh_hero_quick a:hover{ background: rgba(255,255,255,.3); }
.mh_quick_hint{ margin-left: 8px; }

/* ---------- 主体两栏 ---------- */
.mh_body{
    background: #f4f7fa;
    font-size: 16px;
    line-height: 1.8;
    color: #3d4a5c;
    padding-bottom: 70px;
}
.mh_wrap{
    width: 1024px;
    margin: 0 auto;
    padding: 28px 0 0;
    display: -webkit-box;
    display: -webkit-flex;
    display: flex;
    -webkit-align-items: flex-start;
    align-items: flex-start;
    -webkit-box-align: start;
}

/* ---------- 左侧目录 ---------- */
.mh_side{
    -webkit-flex: 0 0 226px;
    flex: 0 0 226px;
    width: 226px;
    position: -webkit-sticky;
    position: sticky;
    top: 20px;
    max-height: calc(100vh - 40px);
    overflow-y: auto;
    background: #ffffff;
    border-radius: 8px;
    box-shadow: 0 1px 3px rgba(24,50,80,.06);
    padding: 14px 0;
}
.mh_side_toggle{ display: none; }
.mh_nav_group{
    padding: 12px 18px 6px;
    font-size: 12px;
    letter-spacing: 1px;
    color: #9aa7b8;
}
.mh_nav_group:first-child{ padding-top: 4px; }
.mh_nav_link{
    display: block;
    padding: 8px 18px 8px 20px;
    font-size: 14px;
    line-height: 1.5;
    color: #4a5568;
    border-left: 3px solid transparent;
    -webkit-transition: color .16s, background .16s;
    transition: color .16s, background .16s;
}
.mh_nav_link:hover{
    color: #08b2f2;
    background: #f6fbff;
}
.mh_nav_link.is_active{
    color: #08b2f2;
    font-weight: 600;
    background: #f2f9ff;
    border-left-color: #08b2f2;
}
.mh_side_foot{
    margin-top: 10px;
    padding: 12px 18px 4px;
    border-top: 1px solid #f0f3f7;
    font-size: 13px;
    color: #9aa7b8;
}
.mh_side_foot a{ color: #08b2f2; }

/* ---------- 右侧内容 ---------- */
.mh_main{
    -webkit-flex: 1 1 auto;
    flex: 1 1 auto;
    min-width: 0;
    margin-left: 24px;
}

.mh_section{
    background: #ffffff;
    border-radius: 8px;
    box-shadow: 0 1px 3px rgba(24,50,80,.06);
    padding: 26px 30px 10px;
    margin-bottom: 20px;
    scroll-margin-top: 16px;
}
.mh_h2{
    margin: 0 0 14px;
    padding-bottom: 14px;
    border-bottom: 1px solid #eef1f5;
    font-size: 24px;
    line-height: 1.4;
    font-weight: 600;
    color: #1f2d3d;
}
.mh_intro{
    margin: 0 0 20px;
    padding: 12px 16px;
    background: #f7fbfe;
    border-left: 3px solid #08b2f2;
    border-radius: 0 4px 4px 0;
    font-size: 15px;
    line-height: 1.8;
    color: #5a6879;
}

.mh_item{
    padding-bottom: 20px;
    margin-bottom: 20px;
    border-bottom: 1px dashed #eef1f5;
}
.mh_item:last-child{
    border-bottom: 0;
    margin-bottom: 0;
    padding-bottom: 14px;
}
.mh_h3{
    margin: 0 0 12px;
    font-size: 17px;
    line-height: 1.6;
    font-weight: 600;
    color: #1f2d3d;
}
.mh_h3:before{
    content: "";
    display: inline-block;
    width: 4px;
    height: 15px;
    margin-right: 9px;
    border-radius: 2px;
    background: #08b2f2;
    vertical-align: -2px;
}

/* 步骤 / 要点 */
.mh_steps,
.mh_points{
    margin: 0 0 14px;
    padding: 0;
    list-style: none;
}
.mh_steps{ counter-reset: mhstep; }
.mh_steps li{
    position: relative;
    padding: 0 0 10px 34px;
    font-size: 15px;
    line-height: 1.85;
    counter-increment: mhstep;
}
.mh_steps li:before{
    content: counter(mhstep);
    position: absolute;
    left: 0;
    top: 5px;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: #e8f5fe;
    color: #08b2f2;
    font-size: 12px;
    font-weight: 600;
    line-height: 22px;
    text-align: center;
}
.mh_steps li:last-child{ padding-bottom: 0; }

.mh_points li{
    position: relative;
    padding: 0 0 10px 20px;
    font-size: 15px;
    line-height: 1.85;
}
.mh_points li:before{
    content: "";
    position: absolute;
    left: 4px;
    top: 11px;
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: #b9c6d6;
}
.mh_points li:last-child{ padding-bottom: 0; }

/* 正文里的界面名词与强调 */
.mh_body .ui{
    color: #08b2f2;
    font-weight: 600;
    font-style: normal;
    white-space: nowrap;
}
.mh_body strong{
    color: #1f2d3d;
    font-weight: 600;
}

/* 提示块 */
.mh_note{
    margin: 0 0 14px;
    padding: 11px 15px;
    background: #fffbf0;
    border: 1px solid #ffe9b8;
    border-radius: 4px;
    font-size: 14px;
    line-height: 1.8;
    color: #8a6d3b;
}
.mh_note:last-child{ margin-bottom: 0; }

/* 截图 */
.mh_shots{
    display: -webkit-box;
    display: -webkit-flex;
    display: flex;
    -webkit-flex-wrap: wrap;
    flex-wrap: wrap;
    -webkit-align-items: flex-start;
    align-items: flex-start;
    margin: 16px 0 0;
}
.mh_shot{
    margin: 0 16px 16px 0;
    padding: 0;
}
.mh_shot:last-child{ margin-right: 0; }
.mh_shot img{
    display: block;
    max-width: 100%;
    height: auto;
    border: 1px solid #e8edf3;
    border-radius: 6px;
    background: #ffffff;
    cursor: -webkit-zoom-in;
    cursor: zoom-in;
    -webkit-transition: box-shadow .18s, border-color .18s;
    transition: box-shadow .18s, border-color .18s;
}
.mh_shot img:hover{
    border-color: #b8dcf5;
    box-shadow: 0 4px 14px rgba(8,178,242,.16);
}
.mh_shot figcaption{
    margin-top: 7px;
    font-size: 13px;
    line-height: 1.6;
    color: #98a4b3;
    text-align: center;
}
/* 手机端竖版截图：限宽，避免在桌面端被拉得过大 */
.mh_shot_app{ max-width: 300px; }
.mh_shot_app img{ max-width: 300px; }
/* PC 端横版截图：占满内容宽度 */
.mh_shot_pc{ max-width: 100%; }

/* 空结果 */
.mh_empty{
    background: #ffffff;
    border-radius: 8px;
    box-shadow: 0 1px 3px rgba(24,50,80,.06);
    padding: 46px 30px;
    text-align: center;
}
.mh_empty p{ margin: 0 0 10px; font-size: 16px; color: #4a5568; }
.mh_empty b{ color: #08b2f2; }
.mh_empty_tip{ font-size: 14px; color: #98a4b3; }
.mh_empty_tip a{ color: #08b2f2; }

/* 结尾卡片 */
.mh_tail_card{
    background: #ffffff;
    border-radius: 8px;
    box-shadow: 0 1px 3px rgba(24,50,80,.06);
    padding: 30px;
    text-align: center;
}
.mh_tail_card h3{
    margin: 0 0 10px;
    font-size: 20px;
    font-weight: 600;
    color: #1f2d3d;
}
.mh_tail_card p{
    margin: 0 0 20px;
    font-size: 15px;
    color: #5a6879;
}
.mh_tail_btns{ margin-bottom: 18px; }
.mh_btn{
    display: inline-block;
    margin: 0 6px;
    padding: 9px 24px;
    border: 1px solid #d6dee8;
    border-radius: 22px;
    font-size: 15px;
    color: #4a5568;
    -webkit-transition: all .18s;
    transition: all .18s;
}
.mh_btn:hover{ border-color: #08b2f2; color: #08b2f2; }
.mh_btn_primary{
    background: #08b2f2;
    border-color: #08b2f2;
    color: #ffffff;
}
.mh_btn_primary:hover{
    background: #059bda;
    border-color: #059bda;
    color: #ffffff;
}
.mh_tail_qr{ margin-bottom: 16px; }
.mh_tail_qr img{
    display: block;
    width: 148px;
    height: auto;
    margin: 0 auto 8px;
    border: 1px solid #e8edf3;
    border-radius: 6px;
}
.mh_tail_qr span{
    font-size: 13px;
    color: #98a4b3;
}
.mh_tail_contact{
    font-size: 14px;
    color: #98a4b3;
}
.mh_tail_contact a{ color: #08b2f2; }

/* 搜索命中高亮 */
.mh_body mark{
    padding: 0 2px;
    background: #fff2b8;
    color: inherit;
    border-radius: 2px;
}

/* ---------- 回到顶部 ---------- */
.mh_top{
    position: fixed;
    right: 26px;
    bottom: 34px;
    width: 42px;
    height: 42px;
    padding: 0;
    border: 0;
    border-radius: 50%;
    background: #ffffff;
    box-shadow: 0 4px 16px rgba(24,50,80,.16);
    cursor: pointer;
    z-index: 20;
    -webkit-transition: background .18s;
    transition: background .18s;
}
.mh_top svg{
    width: 22px;
    height: 22px;
    fill: #08b2f2;
    vertical-align: middle;
}
.mh_top:hover{ background: #08b2f2; }
.mh_top:hover svg{ fill: #ffffff; }

/* ---------- 图片灯箱 ---------- */
.mh_lightbox{
    position: fixed;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(16,26,40,.86);
    z-index: 100;
    display: -webkit-box;
    display: -webkit-flex;
    display: flex;
    -webkit-flex-direction: column;
    flex-direction: column;
    -webkit-align-items: center;
    align-items: center;
    -webkit-justify-content: center;
    justify-content: center;
    padding: 40px 20px 20px;
    cursor: -webkit-zoom-out;
    cursor: zoom-out;
}
.mh_lightbox img{
    max-width: 92%;
    max-height: 82%;
    border-radius: 6px;
    background: #ffffff;
    box-shadow: 0 12px 40px rgba(0,0,0,.4);
}
.mh_lb_cap{
    margin-top: 14px;
    font-size: 14px;
    color: rgba(255,255,255,.8);
    text-align: center;
}
.mh_lb_close{
    position: absolute;
    top: 14px;
    right: 20px;
    width: 38px;
    height: 38px;
    border: 0;
    border-radius: 50%;
    background: rgba(255,255,255,.16);
    color: #ffffff;
    font-size: 24px;
    line-height: 1;
    cursor: pointer;
}
.mh_lb_close:hover{ background: rgba(255,255,255,.3); }

/* ==========================================================
   移动端适配（viewport 已设为 device-width）
   ========================================================== */
@media screen and (max-width: 768px){
    .mh_hero{ padding: 26px 0 22px; }
    .mh_hero_inner{ width: 100%; padding: 0 16px; }
    .mh_hero_title{ font-size: 22px; margin-bottom: 8px; }
    .mh_hero_desc{ font-size: 13px; margin-bottom: 16px; }
    .mh_hero_search{ max-width: 100%; margin-bottom: 14px; }
    .mh_hero_search input{ height: 42px; font-size: 14px; }
    .mh_hero_quick{ font-size: 12px; line-height: 2; }
    .mh_quick_hint{ margin-left: 0; }

    .mh_body{ font-size: 16px; padding-bottom: 46px; }
    .mh_wrap{
        width: 100%;
        max-width: 1024px;
        display: block;
        padding: 14px 12px 0;
    }

    /* 目录：折叠面板，默认收起 */
    .mh_side{
        width: 100%;
        -webkit-flex: none;
        flex: none;
        position: static;
        max-height: none;
        overflow: visible;
        padding: 0;
        margin-bottom: 14px;
    }
    .mh_side_toggle{
        display: -webkit-box;
        display: -webkit-flex;
        display: flex;
        -webkit-align-items: center;
        align-items: center;
        -webkit-justify-content: space-between;
        justify-content: space-between;
        width: 100%;
        padding: 0 16px;
        height: 46px;
        border: 0;
        background: #ffffff;
        border-radius: 8px;
        font-size: 15px;
        color: #1f2d3d;
        cursor: pointer;
        -webkit-tap-highlight-color: transparent;
    }
    .mh_arrow{
        width: 8px;
        height: 8px;
        border-right: 2px solid #9aa7b8;
        border-bottom: 2px solid #9aa7b8;
        -webkit-transform: rotate(45deg) translate(-2px,-2px);
        transform: rotate(45deg) translate(-2px,-2px);
        -webkit-transition: -webkit-transform .2s;
        transition: transform .2s;
    }
    .mh_side.is_open .mh_arrow{
        -webkit-transform: rotate(-135deg) translate(-2px,-2px);
        transform: rotate(-135deg) translate(-2px,-2px);
    }
    .mh_nav{
        max-height: 0;
        overflow: hidden;
        -webkit-transition: max-height .26s ease;
        transition: max-height .26s ease;
    }
    .mh_side.is_open .mh_nav{
        max-height: 70vh;
        overflow-y: auto;
        border-top: 1px solid #f0f3f7;
    }
    .mh_nav_group{ padding: 10px 16px 4px; }
    .mh_nav_link{
        padding: 11px 16px;
        font-size: 15px;
        border-left-width: 0;
        -webkit-tap-highlight-color: rgba(8,178,242,.08);
    }
    .mh_nav_link.is_active{ border-left-width: 0; }
    .mh_side_foot{ padding: 12px 16px 14px; font-size: 13px; }

    .mh_main{ margin-left: 0; }

    .mh_section{
        padding: 18px 16px 6px;
        margin-bottom: 12px;
        border-radius: 8px;
    }
    .mh_h2{ font-size: 19px; margin-bottom: 12px; padding-bottom: 12px; }
    .mh_intro{ padding: 10px 13px; font-size: 14px; margin-bottom: 16px; }
    .mh_item{ padding-bottom: 16px; margin-bottom: 16px; }
    .mh_h3{ font-size: 16px; margin-bottom: 10px; }
    .mh_steps li,
    .mh_points li{ font-size: 15px; line-height: 1.85; }
    .mh_steps li{ padding-left: 30px; }
    .mh_note{ font-size: 13.5px; padding: 10px 12px; }

    /* 截图：手机端一张一行，竖版限宽居中 */
    .mh_shots{ display: block; margin-top: 14px; }
    .mh_shot{ margin: 0 0 14px; }
    .mh_shot_app,
    .mh_shot_app img{ max-width: 250px; }
    .mh_shot_app{ margin-left: auto; margin-right: auto; }
    .mh_shot_pc,
    .mh_shot_pc img{ max-width: 100%; }
    .mh_shot figcaption{ font-size: 12px; }

    .mh_empty{ padding: 32px 16px; }
    .mh_empty p{ font-size: 15px; }
    .mh_tail_card{ padding: 22px 16px; }
    .mh_tail_card h3{ font-size: 18px; }
    .mh_tail_card p{ font-size: 14px; }
    .mh_btn{ padding: 8px 18px; font-size: 14px; margin-bottom: 8px; }

    .mh_top{ right: 14px; bottom: 20px; width: 38px; height: 38px; }
    .mh_lightbox img{ max-width: 100%; max-height: 76%; }
}
@media screen and (max-width: 420px){
    .mh_hero_title{ font-size: 20px; }
    .mh_h2{ font-size: 18px; }
    .mh_shot_app,
    .mh_shot_app img{ max-width: 210px; }
}

/* ==========================================================
   hidden 属性兜底
   下面这些元素在基础样式里定义了 display（flex / block），其特异性高于
   浏览器默认的 [hidden]{display:none}，会导致设了 hidden 仍然可见。
   最典型的是灯箱 —— 它一直盖在页面上，整页会被压暗。
   ========================================================== */
.mh_lightbox[hidden],
.mh_nav_link[hidden],
.mh_item[hidden],
.mh_section[hidden],
.mh_empty[hidden],
.mh_top[hidden],
.mh_search_clear[hidden]{
    display: none !important;
}