/* 十进制怎样变成二进制？ */

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

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

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

.decbin-story .decbin-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;
}

.decbin-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;
}

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

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

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

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

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

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

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

/* 同一个数 */

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

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

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

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

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

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

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

/* 2 的幂 */

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

.decbin-powers span {
    display: flex;
    min-height: 60px;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    background: #f7f8fc;
    color: #8692a8;
    font-size: 16px;
    font-weight: 900;
}

.decbin-powers span.is-used {
    background: #eef9f0;
    color: #2a9b55;
    border: 2px solid #69c58a;
}

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

.decbin-decompose { background: #f3efff; }
.decbin-result { background: #eef5ff; }

.decbin-decompose code {
    color: #6049b8;
    font-size: 15px;
    font-weight: 900;
}

.decbin-result span {
    color: #617296;
}

.decbin-result strong {
    color: #0752ff;
    font-size: 18px;
}

.decbin-place-table {
    overflow: hidden;
    margin-top: 12px;
    border: 1px solid #e1ebff;
    border-radius: 14px;
}

.decbin-place-table > div {
    display: grid;
    grid-template-columns: 1.2fr repeat(4,1fr);
    gap: 5px;
    align-items: center;
    min-height: 44px;
    padding: 8px 10px;
    border-top: 1px solid #edf1f7;
    text-align: center;
}

.decbin-place-table > div:first-child { border-top: 0; }

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

.decbin-place-table strong {
    color: #2a9b55;
    font-size: 11px;
}

.decbin-place-table code {
    color: #0752ff;
    font-size: 14px;
    font-weight: 900;
}

/* 除2取余 */

.decbin-divisions {
    display: grid;
    gap: 7px;
    margin-top: 14px;
}

.decbin-divisions > div {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 10px 13px;
    border-radius: 10px;
    background: #f7f8fc;
}

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

.decbin-divisions span {
    color: #2a9b55;
    font-size: 10px;
    font-weight: 800;
}

.decbin-remainders {
    display: flex;
    gap: 10px;
    align-items: center;
    flex-wrap: wrap;
    margin-top: 12px;
    padding: 13px 15px;
    border-radius: 14px;
    background: #fff8e5;
}

.decbin-remainders span {
    color: #7c6b3a;
}

.decbin-remainders code {
    color: #9a6800;
    font-size: 14px;
    font-weight: 900;
}

.decbin-result--division {
    flex-direction: column;
}

.decbin-result--division strong {
    font-size: 24px;
}

/* 为什么倒着读 */

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

.decbin-meaning article {
    padding: 16px;
    border: 1px solid #e1ebff;
    border-radius: 14px;
    background: #f9fbff;
    text-align: center;
}

.decbin-meaning__value {
    display: inline-flex;
    width: 68px;
    height: 68px;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: #eef5ff;
    color: #0752ff;
    font-size: 32px;
    font-weight: 900;
}

.decbin-meaning__value--one {
    background: #eef9f0;
    color: #2a9b55;
}

.decbin-story .decbin-meaning h3 {
    margin: 8px 0 4px;
    color: var(--article-heading-color);
    font-size: 14px;
}

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

.decbin-reverse-visual {
    display: grid;
    grid-template-columns: 1fr 25px 1fr 25px 1fr 25px 1fr;
    gap: 6px;
    align-items: center;
    margin-top: 12px;
}

.decbin-reverse-visual > div {
    display: flex;
    min-height: 130px;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    padding: 10px;
    border-radius: 13px;
    background: #f3efff;
    text-align: center;
}

.decbin-reverse-visual small {
    color: #8692a8;
    font-size: 9px;
}

.decbin-reverse-visual strong {
    margin: 4px 0;
    color: #6049b8;
    font-size: 12px;
}

.decbin-reverse-visual code {
    color: #7654d6;
    font-size: 21px;
    font-weight: 900;
}

.decbin-reverse-visual > span {
    color: #7654d6;
    font-size: 20px;
    font-weight: 900;
    text-align: center;
}

/* 完整例子 */

.decbin-example-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 12px;
    margin-top: 14px;
}

.decbin-example-grid > div {
    padding: 16px;
    border-radius: 15px;
}

.decbin-example-grid__division { background: #f7f8fc; }
.decbin-example-grid__check { background: #eef9f0; }

.decbin-story .decbin-example-grid h3 {
    margin: 0 0 9px;
    color: var(--article-heading-color);
    font-size: 14px;
}

.decbin-example-grid__division > div {
    margin-top: 6px;
}

.decbin-example-grid code {
    display: inline-block;
    padding: 6px 8px;
    border-radius: 8px;
    background: #fff;
    color: #1d3d75;
    font-size: 11px;
    font-weight: 800;
}

.decbin-example-grid__check strong {
    display: block;
    margin-bottom: 14px;
    color: #2a9b55;
    font-size: 24px;
}

/* 检查 */

.decbin-check {
    display: grid;
    grid-template-columns: 1.3fr 1fr;
    gap: 12px;
    align-items: center;
    margin-top: 14px;
}

.decbin-check__bits {
    display: grid;
    grid-template-columns: repeat(5,1fr);
    gap: 6px;
    padding: 15px;
    border-radius: 15px;
    background: #eef5ff;
}

.decbin-check__bits > div {
    display: flex;
    min-height: 92px;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    border-radius: 10px;
    background: #fff;
}

.decbin-check__bits strong {
    color: #0752ff;
    font-size: 25px;
}

.decbin-check__bits small {
    margin-top: 4px;
    color: #71809f;
    font-size: 9px;
}

.decbin-check__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;
}

.decbin-check__math code {
    color: #6049b8;
    font-size: 12px;
    font-weight: 800;
}

.decbin-check__math span {
    margin: 7px 0;
    color: #7485a3;
}

.decbin-check__math strong {
    color: #7654d6;
    font-size: 25px;
}

/* 边界 */

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

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

.decbin-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;
}

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

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

/* 总结 */

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

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

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

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

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

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

/* 翻页 */

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

.decbin-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;
}

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

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

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

.decbin-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;
}

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

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

@media (max-width: 900px) {
    .decbin-reverse-visual {
        grid-template-columns: repeat(2,minmax(0,1fr));
        gap: 8px;
    }

    .decbin-reverse-visual > span { display: none; }
}

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

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

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

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

    .decbin-same-value,
    .decbin-example-grid,
    .decbin-check {
        grid-template-columns: minmax(0,1fr);
        gap: 8px;
    }

    .decbin-same-value__equals {
        line-height: 1;
    }

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

    .decbin-place-table > div {
        grid-template-columns: 1.3fr repeat(4,1fr);
        padding: 7px 6px;
    }

    .decbin-divisions > div {
        align-items: flex-start;
        flex-direction: column;
    }

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

    .decbin-reverse-visual {
        grid-template-columns: minmax(0,1fr);
        gap: 7px;
    }

    .decbin-reverse-visual > span {
        display: block;
        transform: rotate(90deg);
    }

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

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

    .decbin-check__bits {
        grid-template-columns: repeat(5,1fr);
        padding: 10px;
    }

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

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

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

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

    .decbin-pagination { gap: 9px; }

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

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

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

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