.article-page {
    max-width: 1420px;
    padding-top: 22px;
}

.article-page .breadcrumb b {
    max-width: 420px;
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
}

.article-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 330px;
    gap: 14px;
    align-items: start;
}

.article-card {
    min-width: 0;
    overflow: hidden;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: #fff;
    box-shadow: var(--shadow);
}

.article-header {
    padding: 42px 42px 34px;
    border-bottom: 1px solid var(--line);
    text-align: center;
}

.article-tags {
    display: flex;
    justify-content: center;
    gap: 7px;
}

.article-tags a {
    padding: 4px 8px;
    border-radius: 4px;
    color: var(--blue);
    background: var(--blue-soft);
    font-size: 11px;
}

.article-header h1 {
    max-width: 900px;
    margin: 20px auto 13px;
    font-size: clamp(31px, 3vw, 43px);
    line-height: 1.25;
    letter-spacing: -0.04em;
}

.article-summary {
    max-width: 850px;
    margin: 0 auto;
    color: var(--muted);
    font-size: 15px;
    line-height: 1.75;
}

.article-meta {
    margin-top: 22px;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 10px 20px;
    color: #727c8b;
    font-size: 12px;
}

.mobile-toc-toggle,
.mobile-toc {
    display: none;
}

.article-body {
    max-width: 940px;
    margin: auto;
    padding: 42px 42px 70px;
    color: #303640;
    font-size: 17px;
    line-height: 1.95;
}

.article-body p {
    margin: 0 0 24px;
}

.article-body > :first-child {
    margin-top: 0;
}

.article-body h2 {
    margin: 56px 0 21px;
    scroll-margin-top: 95px;
    color: #202630;
    font-size: 29px;
    line-height: 1.4;
    letter-spacing: -0.025em;
}

.article-body h3 {
    margin: 32px 0 9px;
    color: #272e38;
    font-size: 19px;
}

.article-body blockquote {
    margin: 32px 0;
    padding: 20px 24px;
    border-left: 4px solid var(--blue);
    background: #f2f6ff;
    color: #294c88;
    font-size: 18px;
    line-height: 1.8;
}

.article-body blockquote p {
    margin: 0;
}

.article-body blockquote cite {
    margin-top: 9px;
    display: block;
    color: #5a6f97;
    font-size: 13px;
    font-style: normal;
}

.article-body ul,
.article-body ol {
    margin: 8px 0 28px;
    padding-left: 26px;
}

.article-body li {
    margin: 8px 0;
    padding-left: 4px;
}

.article-body a {
    color: var(--blue);
    text-decoration: underline;
    text-decoration-thickness: 1px;
    text-underline-offset: 3px;
}

.article-body code {
    padding: 2px 5px;
    border-radius: 4px;
    color: #b42318;
    background: #f5f6f8;
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    font-size: 0.9em;
}

.article-body pre {
    margin: 28px 0;
    padding: 20px;
    overflow-x: auto;
    border-radius: 8px;
    color: #e9eef5;
    background: #172033;
    line-height: 1.65;
}

.article-body pre code {
    padding: 0;
    color: inherit;
    background: transparent;
}

.article-body table {
    width: 100%;
    margin: 28px 0;
    border-collapse: collapse;
    font-size: 15px;
}

.article-body th,
.article-body td {
    padding: 10px 13px;
    border: 1px solid #dfe3e8;
    text-align: left;
}

.article-body th {
    background: #f5f7fa;
}

.article-markdown-image {
    margin: 36px 0;
    text-align: center;
}

.article-markdown-image img {
    max-width: 100%;
    height: auto;
    border-radius: 9px;
    display: inline-block;
}

.article-markdown-image figcaption {
    margin-top: 9px;
    color: #737d8b;
    font-size: 12px;
    line-height: 1.6;
}

.article-image-missing {
    margin: 24px 0;
    padding: 12px 14px;
    border: 1px dashed #d3a09b;
    border-radius: 6px;
    display: block;
    color: #a33a31;
    background: #fff7f6;
    font-size: 13px;
}

.article-image-block {
    margin: 34px 0;
}

.article-image-block img {
    width: 100%;
    height: auto;
    border-radius: 9px;
    display: block;
}

.article-image-block figcaption {
    margin-top: 9px;
    color: #737d8b;
    text-align: center;
    font-size: 12px;
    line-height: 1.6;
}

.article-video-block {
    margin: 34px 0;
    padding: 22px;
    border: 1px solid #dfe6f4;
    border-radius: 9px;
    display: grid;
    grid-template-columns: 46px 1fr;
    gap: 16px;
    background: #f7f9fd;
}

.article-video-block > span {
    width: 46px;
    height: 46px;
    border-radius: 50%;
    display: grid;
    place-items: center;
    color: #fff;
    background: var(--blue);
    font-size: 14px;
}

.article-video-block strong,
.article-video-block p,
.article-video-block a {
    display: block;
}

.article-video-block p {
    margin: 5px 0 8px;
    color: var(--muted);
    font-size: 14px;
    line-height: 1.65;
}

.article-video-block a {
    color: var(--blue);
    font-size: 13px;
}

.article-sidebar {
    max-height: calc(100vh - 104px);
    position: sticky;
    top: 88px;
    align-self: start;
    overflow-y: auto;
    display: grid;
    gap: 14px;
    scrollbar-width: thin;
    scrollbar-color: #ccd2db transparent;
}

.article-sidebar .side-card {
    padding: 20px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--surface);
    box-shadow: var(--shadow);
}

.article-sidebar-kicker {
    display: none;
}

.side-title {
    margin: -20px -20px 18px;
    padding: 15px 20px;
    border-bottom: 1px solid var(--line);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.side-title h2 {
    margin: 0;
    font-size: 17px;
}

.article-profile-line {
    display: grid;
    grid-template-columns: 64px minmax(0, 1fr);
    align-items: center;
    gap: 13px;
}

.article-profile-avatar {
    width: 64px;
    height: 64px;
    border-radius: 10px;
    object-fit: cover;
}

.article-profile-line > div,
.article-contact-primary > div {
    min-width: 0;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
}

.article-profile-line strong,
.article-contact-primary strong {
    color: #252b35;
    font-size: 14px;
}

.article-profile-line span {
    color: var(--muted);
    font-size: 10px;
    line-height: 1.5;
}

.article-profile-card > p {
    margin: 14px 0 0;
    color: var(--muted);
    font-size: 11px;
    line-height: 1.7;
}

.article-contact-badge {
    padding: 4px 7px;
    border-radius: 4px;
    color: var(--green);
    background: #eaf8ef;
    font-size: 9px;
}

.article-contact-primary {
    display: grid;
    grid-template-columns: 104px minmax(0, 1fr);
    align-items: center;
    gap: 14px;
}

.article-contact-qr {
    width: 104px;
    height: 104px;
    padding: 4px;
    border: 1px solid #e1e5ea;
    border-radius: 7px;
    display: block;
    background: #fff;
    object-fit: contain;
}

.article-contact-primary p {
    margin: 0;
    color: var(--muted);
    font-size: 11px;
    line-height: 1.55;
}

.article-contact-primary small {
    color: #778190;
    font-size: 9px;
    line-height: 1.55;
}

.qr-code {
    border: 7px solid #fff;
    display: block;
    background-color: #fff;
    background-image: linear-gradient(90deg, #172030 10px, transparent 10px),
        linear-gradient(#172030 10px, transparent 10px),
        linear-gradient(90deg, transparent 6px, #172030 6px, #172030 9px, transparent 9px),
        linear-gradient(transparent 6px, #172030 6px, #172030 9px, transparent 9px);
    background-size: 22px 22px, 22px 22px, 15px 15px, 15px 15px;
    box-shadow: inset 0 0 0 1px #dfe2e7;
}

.official-code {
    background-image: linear-gradient(90deg, #2864dc 9px, transparent 9px),
        linear-gradient(#2864dc 9px, transparent 9px),
        linear-gradient(90deg, transparent 6px, #2864dc 6px, #2864dc 9px, transparent 9px),
        linear-gradient(transparent 6px, #2864dc 6px, #2864dc 9px, transparent 9px);
    background-size: 20px 20px, 20px 20px, 15px 15px, 15px 15px;
}

.contact-item {
    display: grid;
    grid-template-columns: 108px 1fr;
    gap: 14px;
    align-items: center;
}

.contact-item > div {
    min-width: 0;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 5px;
}

.contact-item .qr-code {
    width: 108px;
    height: 108px;
}

.contact-item.secondary {
    grid-template-columns: 78px 1fr;
}

.contact-item.secondary .qr-code {
    width: 78px;
    height: 78px;
}

.contact-item strong {
    font-size: 14px;
}

.contact-item p {
    margin: 0;
    color: var(--muted);
    font-size: 11px;
    line-height: 1.55;
}

.contact-item small {
    color: #778190;
    font-size: 9px;
}

.contact-label {
    padding: 3px 6px;
    border-radius: 4px;
    color: var(--blue);
    background: var(--blue-soft);
    font-size: 9px;
}

.contact-label.green {
    color: var(--green);
    background: #eaf8ef;
}

.contact-divider {
    margin: 19px 0;
    position: relative;
    text-align: center;
}

.contact-divider::before {
    content: "";
    height: 1px;
    position: absolute;
    top: 50%;
    right: 0;
    left: 0;
    background: var(--line);
}

.contact-divider span {
    padding: 0 8px;
    position: relative;
    color: #7d8694;
    background: #fff;
    font-size: 9px;
}

.toc-card {
    position: static;
}

.toc-card .side-title > span {
    color: var(--blue);
    font-size: 11px;
}

.article-toc {
    display: grid;
}

.article-toc a {
    padding: 10px 0;
    border-bottom: 1px solid #edf0f3;
    color: #586271;
    font-size: 12px;
    line-height: 1.5;
}

.article-toc a:last-child {
    border-bottom: 0;
}

.article-toc a:hover,
.article-toc a.active {
    color: var(--blue);
}

.toc-card > button {
    width: 100%;
    min-height: 36px;
    margin-top: 14px;
    border: 1px solid var(--line);
    border-radius: 6px;
    color: #687281;
    background: #f7f8fa;
    cursor: pointer;
    font-size: 10px;
}

.visually-hidden {
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    position: absolute;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

@media (max-width: 1050px) {
    .article-layout {
        grid-template-columns: minmax(0, 1fr) 285px;
    }

    .article-header {
        padding-inline: 38px;
    }

    .article-body {
        padding-inline: 42px;
    }

    .contact-item {
        grid-template-columns: 90px 1fr;
    }

    .contact-item .qr-code {
        width: 90px;
        height: 90px;
    }

    .contact-item.secondary {
        grid-template-columns: 72px 1fr;
    }

    .contact-item.secondary .qr-code {
        width: 72px;
        height: 72px;
    }

    .article-contact-primary {
        grid-template-columns: 88px minmax(0, 1fr);
        gap: 11px;
    }

    .article-contact-qr {
        width: 88px;
        height: 88px;
    }
}

@media (max-width: 820px) {
    .article-page {
        padding-inline: 12px;
    }

    .article-layout {
        grid-template-columns: 1fr;
    }

    .article-sidebar {
        max-height: none;
        position: static;
        grid-row: 2;
        overflow: visible;
    }

    .article-sidebar-kicker {
        margin: 5px 2px 0;
        display: block;
        color: #687281;
        font-size: 13px;
        line-height: 1.7;
    }

    .toc-card {
        display: none;
    }

    .article-profile-card,
    .article-contact-card {
        padding: 24px;
    }

    .article-profile-card .side-title,
    .article-contact-card .side-title {
        margin: -24px -24px 20px;
        padding-inline: 24px;
    }

    .article-profile-line {
        grid-template-columns: 76px minmax(0, 1fr);
    }

    .article-profile-avatar {
        width: 76px;
        height: 76px;
    }

    .article-profile-line strong,
    .article-contact-primary strong {
        font-size: 15px;
    }

    .article-profile-line span,
    .article-profile-card > p,
    .article-contact-primary p {
        font-size: 12px;
    }

    .article-contact-primary {
        grid-template-columns: 116px minmax(0, 1fr);
        gap: 18px;
    }

    .article-contact-qr {
        width: 116px;
        height: 116px;
    }

    .article-header {
        padding: 34px 28px 28px;
    }

    .article-body {
        padding: 35px 38px 58px;
    }

    .mobile-toc-toggle {
        width: calc(100% - 56px);
        min-height: 46px;
        margin: 20px 28px 0;
        padding: 0 14px;
        border: 1px solid var(--line);
        border-radius: 7px;
        display: flex;
        justify-content: space-between;
        align-items: center;
        background: #f8f9fb;
        font-size: 12px;
    }

    .mobile-toc-toggle i {
        color: var(--blue);
        font-style: normal;
        font-size: 10px;
    }

    .mobile-toc {
        margin: 0 28px;
        padding: 8px 14px 13px;
        border: 1px solid var(--line);
        border-top: 0;
        border-radius: 0 0 7px 7px;
    }

    .mobile-toc.open {
        display: grid;
    }

    .mobile-toc a {
        padding: 8px 0;
        color: var(--muted);
        font-size: 12px;
    }

    .contact-card {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 18px 28px;
    }

    .contact-card .side-title {
        margin-bottom: 0;
        grid-column: 1 / -1;
    }

    .contact-divider {
        display: none;
    }

    .contact-item.secondary {
        grid-template-columns: 90px 1fr;
    }

    .contact-item.secondary .qr-code {
        width: 90px;
        height: 90px;
    }
}

@media (max-width: 560px) {
    .article-page .breadcrumb b {
        max-width: 180px;
    }

    .article-header {
        padding: 28px 18px 24px;
    }

    .article-header h1 {
        margin-top: 16px;
        font-size: 32px;
    }

    .article-summary {
        font-size: 14px;
    }

    .article-meta {
        gap: 8px 13px;
        font-size: 11px;
    }

    .article-header .article-meta span:nth-child(2) {
        display: none;
    }

    .mobile-toc-toggle {
        width: calc(100% - 36px);
        margin-inline: 18px;
    }

    .mobile-toc {
        margin-inline: 18px;
    }

    .article-body {
        padding: 28px 19px 48px;
        font-size: 16px;
        line-height: 1.9;
    }

    .article-body h2 {
        margin-top: 50px;
        font-size: 25px;
    }

    .article-body h3 {
        font-size: 18px;
    }

    .article-body blockquote {
        padding: 17px;
        font-size: 17px;
    }

    .contact-card {
        display: block;
    }

    .article-sidebar-kicker {
        margin-inline: 4px;
    }

    .article-profile-card,
    .article-contact-card {
        padding: 20px;
    }

    .article-profile-card .side-title,
    .article-contact-card .side-title {
        margin: -20px -20px 18px;
        padding-inline: 20px;
    }

    .article-contact-primary {
        grid-template-columns: 104px minmax(0, 1fr);
        gap: 14px;
    }

    .article-contact-qr {
        width: 104px;
        height: 104px;
    }

    .contact-card .side-title {
        margin-bottom: 18px;
    }

    .contact-divider {
        display: block;
    }

    .contact-item {
        grid-template-columns: 104px 1fr;
    }

    .contact-item .qr-code {
        width: 104px;
        height: 104px;
    }

    .contact-item.secondary {
        grid-template-columns: 78px 1fr;
    }

    .contact-item.secondary .qr-code {
        width: 78px;
        height: 78px;
    }
}

@media (max-width: 350px) {
    .article-page {
        padding-inline: 8px;
    }

    .article-header h1 {
        font-size: 29px;
    }

    .article-body {
        padding-inline: 15px;
    }

    .article-body h2 {
        font-size: 23px;
    }

    .contact-item {
        grid-template-columns: 92px 1fr;
    }

    .contact-item .qr-code {
        width: 92px;
        height: 92px;
    }
}