.co-hero {
    padding: 44px 0 28px;
    border-bottom: 1px solid var(--border);
    margin-bottom: 24px;
    background: var(--bg) url('/assets/image/pattern-bg.svg') repeat;
}

.co-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 12px;
    border-radius: 999px;
    background: rgba(29, 155, 240, .1);
    border: 1px solid rgba(29, 155, 240, .25);
    color: var(--accent);
    font-size: 10.5px;
    font-weight: 700;
    letter-spacing: .5px;
    text-transform: uppercase;
    margin-bottom: 14px;
}

.co-hero h1 {
    font-family: 'Unbounded', sans-serif;
    font-size: 30px;
    font-weight: 900;
    letter-spacing: -1.5px;
    line-height: 1.2;
    margin: 0 0 10px;
    padding: 0;
}

.co-hero h1::before {
    display: none;
}

.co-hero h1 em {
    font-style: italic;
    color: var(--accent);
}

.co-hero > p {
    max-width: 760px;
    font-size: 14px;
    line-height: 1.75;
    color: var(--text-dim);
    margin: 0;
}

.co-counter {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    margin-top: 14px !important;
    padding: 6px 14px;
    border-radius: 999px;
    background: var(--surface);
    border: 1px solid var(--border);
    font-size: 11.5px;
    color: var(--text-dim);
}

.co-counter .mdi {
    color: var(--accent);
}

.co-filters {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 6px;
    margin-bottom: 18px;
}

.co-filters > a {
    padding: 6px 14px;
    border-radius: 999px;
    border: 1px solid var(--border);
    background: var(--surface);
    color: var(--text-dim);
    font-size: 11.5px;
}

.co-filters > a:hover,
.co-filters > a.is-active {
    color: var(--accent);
    border-color: var(--accent);
    background: rgba(29, 155, 240, .06);
}

.co-search {
    display: flex;
    gap: 6px;
    align-items: center;
    margin-left: auto;
}

.co-search .form-input {
    padding: 7px 14px;
    font-size: 11.5px;
    min-width: 220px;
}

@media (max-width: 700px) {
    .co-hero h1 {
        font-size: 23px;
    }

    .co-search {
        margin-left: 0;
        width: 100%;
    }

    .co-search .form-input {
        flex: 1;
        min-width: 0;
    }
}

.co-gate {
    margin-bottom: 20px;
}

.co-filters {
    margin-bottom: 18px;
}

.co-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 16px;
}

.co-card {
    display: flex;
    flex-direction: column;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 14px;
    overflow: hidden;
    color: var(--text);
    transition: transform .15s, border-color .15s, box-shadow .15s;
}

.co-card:hover {
    transform: translateY(-2px);
    border-color: rgba(29, 155, 240, .35);
    box-shadow: 0 12px 30px rgba(15, 20, 25, .08);
}

.co-card-media {
    position: relative;
    aspect-ratio: 16 / 9;
    background: var(--surface3);
    overflow: hidden;
}

.co-card-media img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.co-card-fallback {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 40px;
    color: rgba(29, 155, 240, .35);
}

.co-level {
    position: absolute;
    top: 10px;
    left: 10px;
    padding: 3px 10px;
    border-radius: 999px;
    font-size: 10px;
    font-weight: 700;
    letter-spacing: .5px;
    text-transform: uppercase;
    background: var(--surface);
    border: 1px solid var(--border2);
}

.co-level.niv1 {
    color: #00875a;
    border-color: rgba(0, 186, 124, .35);
    background: rgba(0, 186, 124, .12);
}

.co-level.niv2 {
    color: var(--accent);
    border-color: rgba(29, 155, 240, .35);
    background: rgba(29, 155, 240, .12);
}

.co-level.niv3 {
    color: #b8590f;
    border-color: rgba(255, 122, 0, .35);
    background: rgba(255, 122, 0, .12);
}

.co-lock {
    position: absolute;
    top: 10px;
    right: 10px;
    width: 26px;
    height: 26px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--surface);
    border: 1px solid var(--border2);
    color: var(--text-dim);
    font-size: 14px;
}

.co-card-body {
    flex: 1;
    padding: 14px 16px 10px;
}

.co-card-body h2 {
    font-size: 14px;
    font-weight: 700;
    line-height: 1.4;
    margin: 0 0 6px;
    padding: 0;
}

.co-card-body h2::before {
    display: none;
}

.co-card-body p {
    font-size: 11.5px;
    line-height: 1.65;
    color: var(--text-dim);
    margin: 0;
}

.co-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
    margin-top: 10px;
}

.co-tag {
    font-size: 10px;
    padding: 2px 8px;
    border-radius: 999px;
    background: var(--surface2);
    color: var(--text-dimmer);
}

.co-card-foot {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    padding: 10px 16px 14px;
    font-size: 10.5px;
    color: var(--text-dimmer);
}

.co-open {
    color: var(--accent);
    font-weight: 600;
}

.co-back {
    margin-bottom: 14px;
    font-size: 13px;
}

.co-back a {
    color: var(--text-dim);
}

.co-back a:hover {
    color: var(--accent);
}

.co-article-head {
    padding-bottom: 18px;
    border-bottom: 1px solid var(--border);
    margin-bottom: 20px;
}

.co-article-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 6px 12px;
    font-size: 11px;
    color: var(--text-dimmer);
    margin-bottom: 12px;
}

.co-article-meta .co-level {
    position: static;
}

.co-article-head h1 {
    font-family: 'Unbounded', sans-serif;
    font-size: 26px;
    font-weight: 900;
    letter-spacing: -1px;
    line-height: 1.25;
    margin: 0 0 8px;
}

.co-article-sub {
    font-size: 13px;
    line-height: 1.7;
    color: var(--text-dim);
    margin: 0;
}

.co-article-cover img {
    width: 100%;
    border-radius: 14px;
    border: 1px solid var(--border);
    margin-bottom: 22px;
    display: block;
}

.co-next {
    margin-top: 34px;
    padding-top: 20px;
    border-top: 1px solid var(--border);
}

.co-next h2 {
    font-size: 13px;
    margin: 0 0 12px;
    padding: 0;
}

.co-next h2::before {
    display: none;
}

.co-next h2 .mdi {
    color: var(--accent);
}

.co-next-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 10px;
}

.co-next-list a {
    display: flex;
    flex-direction: column;
    gap: 3px;
    padding: 12px 14px;
    border: 1px solid var(--border);
    border-radius: 10px;
    background: var(--surface);
    color: var(--text);
    font-size: 12px;
}

.co-next-list a:hover {
    border-color: var(--accent);
}

.co-next-list span {
    font-size: 10.5px;
    color: var(--text-dimmer);
}

@media (max-width: 600px) {
    .co-article-head h1 {
        font-size: 21px;
    }
}

.co-content {
    font-size: 13px;
    line-height: 1.85;
    color: var(--text);
}

.co-content p {
    margin-bottom: 14px;
}

.co-content h3 {
    font-family: 'Unbounded', sans-serif;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: -.3px;
    margin: 22px 0 10px;
    color: var(--text);
}

.co-content ul,
.co-content ol {
    margin: 0 0 14px;
    padding-left: 22px;
}

.co-content li {
    margin-bottom: 6px;
}

.co-content a {
    color: var(--accent);
    text-decoration: underline;
    text-underline-offset: 2px;
}

.co-content a:hover {
    color: var(--accent5);
}

.co-content img {
    display: block;
    max-width: 100%;
    height: auto;
    border-radius: 10px;
    border: 1px solid var(--border);
    margin: 16px 0;
}

.co-content code {
    background: var(--surface3);
    border: 1px solid var(--border);
    border-radius: 5px;
    padding: 1px 6px;
    font-size: 11.5px;
}

.co-content blockquote {
    border-left: 3px solid var(--accent);
    background: rgba(29, 155, 240, .05);
    padding: 10px 16px;
    border-radius: 0 8px 8px 0;
    margin: 0 0 14px;
    color: var(--text-dim);
}

.co-content .code-wrap {
    position: relative;
    margin: 16px 0;
}

.co-content pre.code-block {
    background: #f0f4f8;
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 16px 18px;
    font-size: clamp(11px, 1.5vw, 12px);
    line-height: 1.85;
    white-space: pre;
    overflow-x: auto;
    margin: 0;
    display: block;
    color: var(--text);
    -webkit-overflow-scrolling: touch;
}

.co-content .code-copy {
    position: absolute;
    top: 8px;
    right: 8px;
    display: inline-flex;
    align-items: center;
    gap: 5px;
    font-family: inherit;
    font-size: 10.5px;
    font-weight: 600;
    color: var(--text-dim);
    background: var(--surface);
    border: 1px solid var(--border2);
    border-radius: 999px;
    padding: 4px 10px;
    cursor: pointer;
    transition: color .15s, border-color .15s, background .15s;
}

.co-content .code-copy:hover {
    color: var(--accent);
    border-color: var(--accent);
    background: rgba(29, 155, 240, .06);
}

.co-content img { cursor: zoom-in; }

.co-article {
    max-width: 780px;
    margin: 0 auto;
}

.co-article-meta time,
.co-article-meta span:not(.co-level) {
    display: inline-flex;
    align-items: center;
    gap: 4px;
}