:root {
    --hc-bg: #f3f5f8;
    --hc-card: #ffffff;
    --hc-border: #d9e1eb;
    --hc-text: #13294b;
    --hc-muted: #60718a;
    --hc-link: #1f55ff;
}

.hc-page {
    background: var(--hc-bg);
    padding: 24px 0 40px;
    margin-top: -1rem;
}

.hc-container {
    max-width: 1040px;
}

.hc-home-top {
    text-align: center;
}

.hc-title {
    margin: 0;
    color: #0f2347;
    font-size: clamp(38px, 5vw, 56px);
    font-weight: 700;
    letter-spacing: -0.02em;
}

.hc-title-left {
    font-size: clamp(38px, 4.4vw, 46px);
    text-align: left;
}

.hc-subtitle {
    margin: 8px 0 16px;
    color: var(--hc-muted);
    font-size: 14px;
}

.hc-topbar {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: 16px;
    align-items: center;
    margin-bottom: 12px;
}

.hc-topbar-detail {
    margin-bottom: 14px;
}

.hc-search-home {
    max-width: 520px;
    margin: 22px auto 0;
}

.hc-search-wrap input {
    width: 100%;
    height: 42px;
    border: 1px solid var(--hc-border);
    border-radius: 12px;
    background: #fff;
    color: #2c3d59;
    padding: 0 14px;
    font-size: 15px;
}

.hc-search-wrap input::placeholder {
    color: #8d9aae;
}

.hc-search-wrap input:focus {
    outline: none;
    border-color: #b1bfd4;
    box-shadow: 0 0 0 3px rgba(177, 191, 212, 0.24);
}

.help-center-container {
    margin-top: 28px;
}

.categories-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
}

.category-card {
    background: var(--hc-card);
    border: 1px solid var(--hc-border);
    border-radius: 12px;
    text-decoration: none;
    color: inherit;
    min-height: 168px;
    padding: 22px;
    transition: border-color .15s ease, box-shadow .15s ease;
}

.category-card:hover {
    border-color: #b9c7d9;
    box-shadow: 0 3px 10px rgba(20, 37, 70, 0.06);
}

.category-card-icon {
    font-size: 22px;
    color: #2f61ff;
    line-height: 1;
}

.category-card h3 {
    margin: 12px 0 8px;
    font-size: 18px;
    font-weight: 700;
    color: #0f2347;
}

.category-card p {
    margin: 0;
    font-size: 15px;
    color: #526684;
    line-height: 1.45;
}

.category-card-count {
    margin-top: 12px;
    font-size: 13px;
    color: #71829a;
}

.hc-content {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 286px;
    gap: 16px;
    align-items: start;
}

.hc-card {
    background: var(--hc-card);
    border: 1px solid var(--hc-border);
    border-radius: 12px;
}

.hc-list-card,
.hc-article-card,
.hc-sidebar-card {
    padding: 18px 20px;
}

.hc-list-card h2,
.hc-sidebar-card h3 {
    margin: 0 0 12px;
    font-size: 28px;
    font-weight: 700;
    color: #10254a;
}

.hc-list-link {
    display: block;
    text-decoration: none;
    color: #152a50;
    font-size: 15px;
    line-height: 1.45;
    padding: 10px 0;
    border-bottom: 1px solid #e5ebf2;
}

.hc-list-link:hover,
.hc-list-link.active {
    color: var(--hc-link);
}

.hc-list-link small {
    display: block;
    margin-top: 2px;
    font-size: 13px;
    color: #7989a0;
}

.hc-sidebar-card .hc-list-link:last-of-type {
    border-bottom: 0;
}

.hc-back-link {
    display: block;
    margin-top: 12px;
    color: #182d55;
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
}

.help-empty-state {
    margin-top: 6px;
    border: 1px dashed #ccd5e4;
    border-radius: 9px;
    padding: 12px;
    font-size: 14px;
    color: #5f7390;
    background: #f8fafd;
}

.hc-article-title {
    margin: 0;
    color: #0f2348;
    font-size: clamp(30px, 3.2vw, 42px);
    font-weight: 700;
    line-height: 1.16;
}

.hc-article-date {
    margin: 12px 0 18px;
    color: #6f8097;
    font-size: 13px;
}

.article-content {
    color: #162c53;
    font-size: 16px;
    line-height: 1.7;
}

.article-content p,
.article-content li {
    font-size: 16px;
}

.article-content h2,
.article-content h3,
.article-content h4 {
    color: #10264d;
    margin-top: 22px;
    margin-bottom: 10px;
    font-size: 32px;
    line-height: 1.22;
}

.article-content ul,
.article-content ol {
    padding-left: 26px;
}

.article-content hr {
    margin: 22px 0;
    border-color: #e2e8f1;
}

.article-navigation {
    margin-top: 20px;
    padding-top: 16px;
    border-top: 1px solid #e0e7f1;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
}

.article-nav-link {
    border: 1px solid #d9e1eb;
    border-radius: 9px;
    padding: 12px;
    text-decoration: none;
}

.article-nav-link span {
    display: block;
    font-size: 11px;
    color: #6f8198;
    text-transform: uppercase;
}

.article-nav-link strong {
    display: block;
    margin-top: 6px;
    font-size: 14px;
    color: #132a52;
}

.article-nav-link.next {
    text-align: right;
}

@media (max-width: 992px) {
    .categories-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .hc-topbar,
    .hc-content {
        grid-template-columns: 1fr;
    }

    .hc-topbar .hc-search-wrap {
        max-width: 420px;
    }
}

@media (max-width: 640px) {
    .hc-page {
        padding: 16px 0 28px;
    }

    .categories-grid {
        grid-template-columns: 1fr;
    }

    .hc-list-card,
    .hc-article-card,
    .hc-sidebar-card {
        padding: 14px;
    }

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

    .hc-list-card h2,
    .hc-sidebar-card h3 {
        font-size: 22px;
    }

    .hc-list-link {
        font-size: 17px;
    }

    .article-content h2,
    .article-content h3,
    .article-content h4 {
        font-size: 24px;
    }
}