/* 二进制是怎么数数的？ */

.binary-count-story {
    color: var(--article-text-color);
    font-size: 14px;
    line-height: 1.6;
}

.binary-count-story * { box-sizing: border-box; }
.binary-count-story img { display: block; max-width: 100%; }
.binary-count-story p { margin: 0 0 12px; }
.binary-count-story strong { color: var(--article-heading-color); }
.binary-count-story code {
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

.binary-count-section {
    margin-top: 22px;
    scroll-margin-top: 110px;
}

.binary-count-story .binary-count-section > h2 {
    display: flex;
    align-items: center;
    gap: 14px;
    margin: 0 0 8px;
    color: var(--article-heading-color);
    font-size: 20px;
    line-height: 1.35;
    font-weight: 900;
}

.binary-count-number {
    display: inline-flex;
    flex: 0 0 38px;
    height: 38px;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: #0752ff;
    color: #fff;
    font-size: 16px;
    font-weight: 700;
}

.binary-count-key,
.binary-count-note,
.binary-count-warning {
    display: flex;
    gap: 12px;
    align-items: flex-start;
    margin-top: 14px;
    padding: 14px 16px;
    border-radius: 14px;
}

.binary-count-key { background: #eaf5ff; }
.binary-count-note { background: #fff8e5; }
.binary-count-warning {
    border: 1px solid #ffd0dc;
    background: #fff2f6;
}

.binary-count-key img,
.binary-count-warning img {
    width: 54px;
    height: 54px;
    flex: 0 0 54px;
    object-fit: contain;
}

.binary-count-note__icon {
    display: inline-flex;
    width: 52px;
    height: 52px;
    flex: 0 0 52px;
    align-items: center;
    justify-content: center;
    font-size: 30px;
}

.binary-count-story .binary-count-key h3,
.binary-count-story .binary-count-note h3,
.binary-count-story .binary-count-warning h3 {
    margin: 0 0 4px;
    font-size: 15px;
}

.binary-count-story .binary-count-key h3 { color: #0752ff; }
.binary-count-story .binary-count-note h3 { color: #9a6800; }
.binary-count-story .binary-count-warning h3 { color: #d83265; }

.binary-count-key p,
.binary-count-note p,
.binary-count-warning p { margin: 0; }

/* 十进制和二进制 */

.binary-count-base {
    display: grid;
    grid-template-columns: 1fr 50px 1fr;
    gap: 10px;
    align-items: center;
    margin-top: 14px;
}

.binary-count-base__decimal,
.binary-count-base__binary {
    min-width: 0;
    padding: 16px;
    border-radius: 15px;
    text-align: center;
}

.binary-count-base__decimal { background: #eef5ff; }
.binary-count-base__binary { background: #eef9f0; }

.binary-count-base__label {
    display: inline-block;
    margin-bottom: 10px;
    color: var(--article-heading-color);
    font-size: 15px;
    font-weight: 900;
}

.binary-count-base__digits {
    display: grid;
    grid-template-columns: repeat(5,1fr);
    gap: 5px;
}

.binary-count-base__digits--binary {
    grid-template-columns: repeat(2,1fr);
    max-width: 150px;
    margin: 0 auto;
}

.binary-count-base__digits span {
    display: flex;
    min-height: 38px;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    background: #fff;
    color: #0752ff;
    font-weight: 900;
}

.binary-count-base__binary .binary-count-base__digits span { color: #2a9b55; }

.binary-count-base p {
    margin: 10px 0 0;
    color: #617296;
    font-size: 10px;
}

.binary-count-base__compare {
    color: #7485a3;
    font-size: 28px;
    font-weight: 900;
    text-align: center;
}

/* 位值 */

.binary-count-places {
    display: grid;
    grid-template-columns: repeat(2,minmax(0,1fr));
    gap: 12px;
    margin-top: 14px;
}

.binary-count-places > div {
    min-width: 0;
    padding: 16px;
    border-radius: 15px;
}

.binary-count-places__decimal { background: #eef5ff; }
.binary-count-places__binary { background: #f3efff; }

.binary-count-story .binary-count-places h3 {
    margin: 0 0 10px;
    color: var(--article-heading-color);
    font-size: 15px;
}

.binary-count-places > div > div {
    display: grid;
    grid-template-columns: repeat(4,1fr);
    gap: 6px;
}

.binary-count-places span {
    display: flex;
    min-height: 72px;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    border-radius: 10px;
    background: #fff;
}

.binary-count-places small {
    color: #71809f;
    font-size: 9px;
}

.binary-count-places strong {
    margin-top: 4px;
    color: #0752ff;
    font-size: 16px;
}

.binary-count-places__binary strong { color: #7654d6; }

/* 进位 */

.binary-count-carry {
    display: grid;
    grid-template-columns: repeat(3,minmax(0,1fr));
    gap: 10px;
    margin-top: 14px;
}

.binary-count-carry__step {
    padding: 15px 12px;
    border: 1px solid #e1ebff;
    border-radius: 14px;
    background: #f9fbff;
    text-align: center;
}

.binary-count-carry__title {
    display: block;
    color: var(--article-heading-color);
    font-size: 13px;
    font-weight: 900;
}

.binary-count-carry code {
    display: inline-block;
    margin: 8px 0;
    padding: 7px 9px;
    border-radius: 8px;
    background: #eef5ff;
    color: #1d3d75;
    font-size: 12px;
    font-weight: 800;
}

.binary-count-carry p {
    margin: 0;
    color: #617296;
    font-size: 10px;
}

.binary-count-carry-demo {
    display: flex;
    gap: 12px;
    align-items: center;
    justify-content: center;
    margin-top: 12px;
    padding: 14px;
    border-radius: 14px;
    background: #f3efff;
}

.binary-count-carry-demo > div {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.binary-count-carry-demo small {
    color: #71809f;
    font-size: 9px;
}

.binary-count-carry-demo code {
    margin-top: 4px;
    color: #6049b8;
    font-size: 20px;
    font-weight: 900;
}

.binary-count-carry-demo > span {
    color: #7654d6;
    font-weight: 900;
}

/* 对照表 */

.binary-count-table {
    overflow: hidden;
    margin-top: 14px;
    border: 1px solid #e1ebff;
    border-radius: 14px;
}

.binary-count-table > div {
    display: grid;
    grid-template-columns: .7fr .9fr 1.5fr;
    gap: 8px;
    align-items: center;
    min-height: 42px;
    padding: 8px 12px;
    border-top: 1px solid #edf1f7;
}

.binary-count-table > div:first-child { border-top: 0; }

.binary-count-table__head {
    background: #eef5ff;
    color: #1d3d75;
    font-weight: 900;
}

.binary-count-table code {
    color: #0752ff;
    font-weight: 900;
}

.binary-count-table > div > span:last-child {
    color: #617296;
    font-size: 10px;
}

.binary-count-pattern {
    display: flex;
    gap: 11px;
    align-items: center;
    margin-top: 12px;
    padding: 13px 15px;
    border-radius: 14px;
    background: #eef9f0;
}

.binary-count-pattern > span {
    color: #2a9b55;
    font-size: 28px;
}

.binary-count-pattern p { margin: 0; }

/* 读二进制 */

.binary-count-read {
    display: grid;
    grid-template-columns: 1.4fr 1fr;
    gap: 12px;
    align-items: center;
    margin-top: 14px;
}

.binary-count-read__bits {
    display: grid;
    grid-template-columns: repeat(4,1fr);
    gap: 6px;
    padding: 15px;
    border-radius: 15px;
    background: #eef5ff;
}

.binary-count-read__bits > div {
    display: flex;
    min-height: 95px;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    border-radius: 10px;
    background: #fff;
}

.binary-count-read__bits strong {
    color: #0752ff;
    font-size: 28px;
}

.binary-count-read__bits small {
    margin-top: 4px;
    color: #71809f;
    font-size: 10px;
}

.binary-count-read__math {
    display: flex;
    min-height: 150px;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    padding: 14px;
    border-radius: 15px;
    background: #f3efff;
    text-align: center;
}

.binary-count-read__math code {
    color: #6049b8;
    font-size: 13px;
    font-weight: 800;
}

.binary-count-read__math span {
    margin: 7px 0;
    color: #7485a3;
}

.binary-count-read__math strong {
    color: #7654d6;
    font-size: 26px;
}

.binary-count-note--read { background: #fff8e5; }

/* 前导零 */

.binary-count-leading {
    margin-top: 14px;
    padding: 16px;
    border-radius: 15px;
    background: #f7f8fc;
    text-align: center;
}

.binary-count-leading > div {
    display: flex;
    gap: 7px;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
}

.binary-count-leading code {
    padding: 6px 9px;
    border-radius: 8px;
    background: #fff;
    color: #1d3d75;
    font-weight: 800;
}

.binary-count-leading span {
    color: #71809f;
    font-weight: 900;
}

.binary-count-leading p {
    margin: 9px 0 0;
    color: #617296;
    font-size: 11px;
}

.binary-count-width {
    display: grid;
    grid-template-columns: repeat(2,minmax(0,1fr));
    gap: 10px;
    margin-top: 12px;
}

.binary-count-width article {
    padding: 14px;
    border-radius: 14px;
    background: #eef5ff;
    text-align: center;
}

.binary-count-width strong {
    display: block;
    margin-bottom: 6px;
    color: #0752ff;
    font-size: 13px;
}

.binary-count-width code {
    display: inline-block;
    padding: 6px 9px;
    border-radius: 8px;
    background: #fff;
    color: #1d3d75;
    font-weight: 800;
}

.binary-count-width p {
    margin: 6px 0 0;
    color: #617296;
    font-size: 10px;
}

/* 进制对比 */

.binary-count-systems {
    display: grid;
    grid-template-columns: repeat(3,minmax(0,1fr));
    gap: 10px;
    margin-top: 14px;
}

.binary-count-systems article {
    padding: 15px 12px;
    border: 1px solid #e1ebff;
    border-radius: 14px;
    background: #f9fbff;
    text-align: center;
}

.binary-count-systems__base {
    display: inline-flex;
    width: 60px;
    height: 60px;
    align-items: center;
    justify-content: center;
    border-radius: 18px;
    background: #eaf3ff;
    color: #0752ff;
    font-size: 24px;
    font-weight: 900;
}

.binary-count-story .binary-count-systems h3 {
    margin: 7px 0 4px;
    color: var(--article-heading-color);
    font-size: 14px;
}

.binary-count-systems p {
    margin: 0;
    color: #617296;
    font-size: 10px;
}

.binary-count-systems small {
    display: block;
    margin-top: 4px;
    color: #8692a8;
    font-size: 9px;
}

.binary-count-same-value {
    display: flex;
    gap: 10px;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 12px;
    padding: 14px;
    border-radius: 14px;
    background: #f3efff;
}

.binary-count-same-value code {
    padding: 7px 10px;
    border-radius: 8px;
    background: #fff;
    color: #6049b8;
    font-size: 15px;
    font-weight: 900;
}

.binary-count-same-value span {
    color: #7654d6;
    font-weight: 900;
}

/* 总结 */

.binary-count-summary {
    display: flex;
    gap: 12px;
    margin-top: 22px;
    padding: 18px;
    border-radius: 16px;
    background: #e9f3ff;
    scroll-margin-top: 110px;
}

.binary-count-summary__icon {
    width: 54px;
    height: 54px;
    flex: 0 0 54px;
    object-fit: contain;
}

.binary-count-story .binary-count-summary h2 {
    margin: 0 0 7px;
    color: #0752ff;
    font-size: 19px;
}

.binary-count-summary ul {
    margin: 0;
    padding-left: 20px;
    line-height: 1.75;
}

.binary-count-summary__next {
    margin: 10px 0 0 !important;
    padding-top: 10px;
    border-top: 1px dashed #b8d3f6;
}

.binary-count-summary__next em {
    color: #0752ff;
    font-style: normal;
    font-weight: 800;
}

/* 翻页 */

.binary-count-pagination {
    display: flex;
    justify-content: space-between;
    gap: 18px;
    margin-top: 14px;
}

.binary-count-pagination a {
    display: flex;
    align-items: center;
    gap: 10px;
    max-width: 49%;
    padding: 10px 13px;
    border: 1px solid #d9e7ff;
    border-radius: 12px;
    background: #ffffffb3;
    text-decoration: none;
    box-shadow: 0 3px 10px #c5dbff30;
}

.binary-count-pagination a:last-child { text-align: right; }

.binary-count-pagination strong {
    display: block;
    color: #0752ff;
    font-size: 16px;
}

.binary-count-pagination small {
    display: block;
    color: #576b9f;
    font-size: 12px;
}

.binary-count-pagination__arrow {
    display: inline-flex;
    width: 31px;
    height: 31px;
    flex: 0 0 31px;
    align-items: center;
    justify-content: center;
    border: 1px solid #d9e7ff;
    border-radius: 7px;
    color: #0752ff;
    font-size: 22px;
}

.binary-count-pagination a:hover { background: #edf4ff; }

.binary-count-pagination a:focus-visible {
    outline: 3px solid #0752ff;
    outline-offset: 3px;
}

@media (max-width: 640px) {
    .binary-count-story {
        font-size: 12px;
        line-height: 1.6;
    }

    .binary-count-section { margin-top: 18px; }

    .binary-count-story .binary-count-section > h2 {
        gap: 9px;
        margin-bottom: 6px;
        font-size: 16px;
    }

    .binary-count-number {
        flex-basis: 31px;
        height: 31px;
        font-size: 14px;
    }

    .binary-count-base,
    .binary-count-read {
        grid-template-columns: minmax(0,1fr);
        gap: 7px;
    }

    .binary-count-base__compare {
        transform: rotate(90deg);
        line-height: 1;
    }

    .binary-count-places,
    .binary-count-width {
        grid-template-columns: minmax(0,1fr);
        gap: 8px;
    }

    .binary-count-carry {
        grid-template-columns: minmax(0,1fr);
        gap: 8px;
    }

    .binary-count-carry-demo {
        flex-direction: column;
    }

    .binary-count-key,
    .binary-count-note,
    .binary-count-warning {
        gap: 9px;
        padding: 11px 12px;
    }

    .binary-count-key img,
    .binary-count-warning img,
    .binary-count-note__icon {
        width: 44px;
        height: 44px;
        flex-basis: 44px;
    }

    .binary-count-table > div {
        grid-template-columns: .55fr .8fr 1.5fr;
        padding: 7px 8px;
    }

    .binary-count-read__bits {
        grid-template-columns: repeat(4,1fr);
    }

    .binary-count-systems {
        grid-template-columns: minmax(0,1fr);
        gap: 8px;
    }

    .binary-count-summary {
        gap: 8px;
        padding: 14px;
    }

    .binary-count-summary__icon {
        width: 44px;
        height: 44px;
        flex-basis: 44px;
    }

    .binary-count-story .binary-count-summary h2 { font-size: 17px; }

    .binary-count-pagination { gap: 9px; }

    .binary-count-pagination a {
        flex: 1;
        min-width: 0;
        gap: 5px;
        padding: 8px 6px;
    }

    .binary-count-pagination strong { font-size: 13px; }

    .binary-count-pagination small {
        font-size: 10px;
        line-height: 1.35;
    }

    .binary-count-pagination__arrow {
        width: 26px;
        height: 27px;
        flex-basis: 26px;
        font-size: 18px;
    }
}