/* 二进制怎样变回十进制？ */

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

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

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

.bindec-story .bindec-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;
}

.bindec-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;
}

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

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

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

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

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

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

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

/* 同一个数 */

.bindec-same-value {
    display: grid;
    grid-template-columns: 1fr 60px 1fr;
    gap: 10px;
    align-items: center;
    max-width: 680px;
    margin: 14px auto 0;
}

.bindec-same-value__binary,
.bindec-same-value__decimal {
    display: flex;
    min-height: 150px;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    border-radius: 15px;
    text-align: center;
}

.bindec-same-value__binary { background: #eef5ff; }
.bindec-same-value__decimal { background: #eef9f0; }

.bindec-same-value span {
    color: #617296;
    font-size: 11px;
}

.bindec-same-value strong {
    margin-top: 6px;
    font-size: 30px;
}

.bindec-same-value__binary strong { color: #0752ff; }
.bindec-same-value__decimal strong { color: #2a9b55; }

.bindec-same-value__equals {
    color: #7485a3;
    font-size: 30px;
    font-weight: 900;
    text-align: center;
}

/* 位值 */

.bindec-place-values {
    display: grid;
    grid-template-columns: repeat(5,1fr);
    gap: 7px;
    margin-top: 14px;
}

.bindec-place-values > div {
    display: flex;
    min-height: 86px;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    border-radius: 12px;
    background: #f7f8fc;
}

.bindec-place-values small {
    color: #71809f;
    font-size: 10px;
}

.bindec-place-values strong {
    margin-top: 4px;
    color: #0752ff;
    font-size: 20px;
}

/* 1101 */

.bindec-bits {
    display: grid;
    grid-template-columns: repeat(4,1fr);
    gap: 8px;
    margin-top: 14px;
}

.bindec-bits > div {
    display: flex;
    min-height: 135px;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    border-radius: 14px;
    text-align: center;
}

.bindec-bits .is-on { background: #eef9f0; }
.bindec-bits .is-off { background: #f7f8fc; }

.bindec-bits strong {
    font-size: 30px;
}

.bindec-bits .is-on strong { color: #2a9b55; }
.bindec-bits .is-off strong { color: #9aa6ba; }

.bindec-bits small {
    margin-top: 4px;
    color: #617296;
    font-size: 10px;
}

.bindec-bits span {
    margin-top: 7px;
    font-size: 10px;
    font-weight: 800;
}

.bindec-bits .is-on span { color: #2a9b55; }
.bindec-bits .is-off span { color: #9aa6ba; }

.bindec-math,
.bindec-decompose,
.bindec-result {
    display: flex;
    gap: 10px;
    align-items: center;
    justify-content: center;
    margin-top: 12px;
    padding: 13px 15px;
    border-radius: 14px;
}

.bindec-math { background: #f3efff; }
.bindec-decompose { background: #fff8e5; }
.bindec-result { background: #eef5ff; }

.bindec-math code,
.bindec-decompose code {
    color: #6049b8;
    font-size: 14px;
    font-weight: 900;
}

.bindec-math span { color: #7485a3; }

.bindec-math strong,
.bindec-result strong {
    color: #0752ff;
    font-size: 20px;
}

/* 完整例子 */

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

.bindec-example-table > div {
    display: grid;
    grid-template-columns: 1.35fr repeat(6,1fr);
    gap: 5px;
    align-items: center;
    min-height: 44px;
    padding: 8px 10px;
    border-top: 1px solid #edf1f7;
    text-align: center;
}

.bindec-example-table > div:first-child { border-top: 0; }

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

.bindec-example-table strong {
    color: #0752ff;
    font-size: 11px;
}

.bindec-example-table em {
    color: #2a9b55;
    font-size: 10px;
    font-style: normal;
    font-weight: 800;
}

.bindec-example-table em.is-no { color: #9aa6ba; }

/* 乘2加下一位 */

.bindec-horner {
    display: grid;
    gap: 7px;
    margin-top: 14px;
}

.bindec-horner > div {
    display: grid;
    grid-template-columns: 100px 1fr;
    gap: 10px;
    align-items: center;
    padding: 10px 13px;
    border-radius: 10px;
    background: #f7f8fc;
}

.bindec-horner span {
    color: #617296;
    font-size: 10px;
    font-weight: 800;
}

.bindec-horner code {
    color: #1d3d75;
    font-size: 12px;
    font-weight: 800;
}

/* 检查 */

.bindec-check {
    display: grid;
    grid-template-columns: 1fr 45px 1.3fr;
    gap: 10px;
    align-items: center;
    margin-top: 14px;
}

.bindec-check__left,
.bindec-check__right {
    display: flex;
    min-height: 165px;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    padding: 14px;
    border-radius: 15px;
    text-align: center;
}

.bindec-check__left { background: #eef5ff; }
.bindec-check__right { background: #eef9f0; }

.bindec-check span {
    color: #617296;
    font-size: 10px;
}

.bindec-check strong {
    margin-top: 5px;
    color: #0752ff;
    font-size: 16px;
}

.bindec-check__right strong { color: #2a9b55; }

.bindec-check code {
    margin-top: 7px;
    padding: 6px 8px;
    border-radius: 8px;
    background: #fff;
    color: #2f7048;
    font-size: 11px;
    font-weight: 800;
}

.bindec-check__arrow {
    color: #4f82ff;
    font-size: 25px;
    font-weight: 900;
    text-align: center;
}

/* 边界 */

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

.bindec-limits article {
    min-width: 0;
    padding: 14px 9px;
    border: 1px solid #e1ebff;
    border-radius: 14px;
    background: #f9fbff;
    text-align: center;
}

.bindec-limits article > span {
    display: inline-flex;
    width: 64px;
    height: 64px;
    align-items: center;
    justify-content: center;
    margin-bottom: 6px;
    border-radius: 19px;
    background: #eaf3ff;
    color: #0752ff;
    font-size: 27px;
}

.bindec-story .bindec-limits h3 {
    margin: 0 0 4px;
    color: var(--article-heading-color);
    font-size: 13px;
}

.bindec-limits p {
    margin: 0;
    color: #617296;
    font-size: 10px;
}

/* 总结 */

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

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

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

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

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

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

/* 翻页 */

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

.bindec-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;
}

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

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

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

.bindec-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;
}

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

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

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

    .bindec-section { margin-top: 18px; }

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

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

    .bindec-same-value,
    .bindec-check {
        grid-template-columns: minmax(0,1fr);
        gap: 7px;
    }

    .bindec-same-value__equals,
    .bindec-check__arrow {
        transform: rotate(90deg);
        line-height: 1;
    }

    .bindec-place-values {
        grid-template-columns: repeat(5,1fr);
        gap: 4px;
    }

    .bindec-bits {
        grid-template-columns: repeat(4,1fr);
        gap: 5px;
    }

    .bindec-example-table > div {
        grid-template-columns: 1.5fr repeat(6,1fr);
        padding: 7px 5px;
    }

    .bindec-horner > div {
        grid-template-columns: 80px 1fr;
    }

    .bindec-limits {
        grid-template-columns: minmax(0,1fr);
        gap: 8px;
    }

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

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

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

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

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

    .bindec-pagination { gap: 9px; }

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

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

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

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