/* ===== 门户首页 ===== */
.portal-body {
    margin: 0;
    min-height: 100vh;
    background: var(--color-background, #f8fafc);
    color: var(--color-text, #1e293b);
    font-family: var(--font-body, system-ui, sans-serif);
    display: flex;
    flex-direction: column;
}

.portal-header {
    background: var(--color-surface, #fff);
    border-bottom: 1px solid var(--color-border, #e2e8f0);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 1px 3px rgba(15, 23, 42, 0.04);
}

.portal-header__inner {
    max-width: 1120px;
    margin: 0 auto;
    padding: 0 20px;
    height: 56px;
    display: flex;
    align-items: center;
    gap: 16px;
}

.portal-brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: inherit;
    flex-shrink: 0;
}

.portal-brand__name {
    font-size: 15px;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.portal-nav {
    display: flex;
    align-items: center;
    gap: 4px;
    flex: 1;
}

.portal-nav__link {
    padding: 6px 12px;
    border-radius: 8px;
    font-size: 13px;
    font-weight: 500;
    color: var(--color-text-secondary, #64748b);
    text-decoration: none;
    transition: background 0.15s, color 0.15s;
}

.portal-nav__link:hover {
    background: #f1f5f9;
    color: var(--color-text, #1e293b);
}

.portal-nav__link.is-active {
    background: #eff6ff;
    color: var(--color-primary, #2563eb);
}

.portal-header__user {
    font-size: 13px;
    color: var(--color-text-secondary, #64748b);
    white-space: nowrap;
}

.portal-breadcrumb {
    border-top: 1px solid var(--color-border-light, #f1f5f9);
    background: #fafbfc;
}

.portal-breadcrumb__inner {
    max-width: 1120px;
    margin: 0 auto;
    padding: 8px 20px;
    font-size: 12px;
    color: var(--color-text-secondary, #64748b);
}

.portal-breadcrumb__inner a {
    color: var(--color-primary, #2563eb);
    text-decoration: none;
}

.portal-breadcrumb__inner a:hover {
    text-decoration: underline;
}

.portal-main {
    flex: 1;
    max-width: 1120px;
    width: 100%;
    margin: 0 auto;
    padding: 24px 20px 40px;
    box-sizing: border-box;
}

.portal-hero {
    text-align: center;
    padding: 36px 16px 32px;
    margin-bottom: 28px;
}

.portal-hero__mark {
    margin-bottom: 16px;
}

.portal-hero__title {
    margin: 0 0 8px;
    font-size: clamp(1.75rem, 4vw, 2.25rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    color: var(--color-text, #0f172a);
}

.portal-hero__sub {
    margin: 0 0 8px;
    font-size: 16px;
    color: var(--color-text-secondary, #64748b);
}

.portal-hero__desc {
    margin: 0;
    font-size: 14px;
    color: var(--color-text-muted, #94a3b8);
    max-width: 680px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.6;
}

.portal-features {
    margin-bottom: 36px;
}

.portal-features__grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
}

.portal-feature-group {
    background: var(--color-surface, #fff);
    border: 1px solid var(--color-border, #e2e8f0);
    border-radius: 12px;
    padding: 16px 18px;
}

.portal-feature-group__title {
    margin: 0 0 10px;
    font-size: 14px;
    font-weight: 700;
    color: var(--color-primary, #2563eb);
    letter-spacing: -0.01em;
}

.portal-feature-list {
    margin: 0;
    padding: 0;
    list-style: none;
    font-size: 12px;
    line-height: 1.65;
    color: var(--color-text-secondary, #64748b);
}

.portal-feature-list li {
    margin-bottom: 8px;
}

.portal-feature-list li:last-child {
    margin-bottom: 0;
}

.portal-feature-list strong {
    color: var(--color-text, #334155);
    font-weight: 600;
}

.portal-quick {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 14px;
    margin-bottom: 36px;
}

.portal-quick__card {
    display: flex;
    flex-direction: column;
    gap: 6px;
    padding: 18px 16px;
    background: var(--color-surface, #fff);
    border: 1px solid var(--color-border, #e2e8f0);
    border-radius: 12px;
    text-decoration: none;
    color: inherit;
    transition: border-color 0.15s, box-shadow 0.15s, transform 0.15s;
}

.portal-quick__card:hover {
    border-color: #bfdbfe;
    box-shadow: 0 4px 16px rgba(37, 99, 235, 0.08);
    transform: translateY(-1px);
}

.portal-quick__icon {
    width: 36px;
    height: 36px;
    border-radius: 9px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #eff6ff;
    color: var(--color-primary, #2563eb);
}

.portal-quick__icon svg {
    width: 18px;
    height: 18px;
}

.portal-quick__title {
    font-size: 14px;
    font-weight: 700;
    margin: 0;
}

.portal-quick__desc {
    font-size: 12px;
    color: var(--color-text-secondary, #64748b);
    margin: 0;
    line-height: 1.5;
}

.portal-section {
    margin-bottom: 40px;
}

.portal-section__head {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 16px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--color-border, #e2e8f0);
}

.portal-section__head--help {
    border-bottom-color: #bbf7d0;
}

.portal-section__head--notice {
    border-bottom-color: #fde68a;
}

.portal-section__title {
    margin: 0;
    font-size: 18px;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.portal-section__tag {
    font-size: 11px;
    font-weight: 600;
    padding: 3px 8px;
    border-radius: 999px;
    background: #eff6ff;
    color: #1d4ed8;
}

.portal-section__tag--help {
    background: #dcfce7;
    color: #15803d;
}

.portal-section__tag--notice {
    background: #fef3c7;
    color: #b45309;
}

.portal-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
}

.portal-card {
    display: flex;
    flex-direction: column;
    background: var(--color-surface, #fff);
    border: 1px solid var(--color-border, #e2e8f0);
    border-radius: 12px;
    overflow: hidden;
    text-decoration: none;
    color: inherit;
    transition: box-shadow 0.15s, transform 0.15s;
    height: 100%;
}

.portal-card:hover {
    box-shadow: 0 6px 20px rgba(15, 23, 42, 0.08);
    transform: translateY(-2px);
}

.portal-card__cover {
    aspect-ratio: 16 / 9;
    background: #f1f5f9;
    overflow: hidden;
}

.portal-card__cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.portal-card__body {
    padding: 14px 16px 16px;
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.portal-card__meta {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 11px;
    color: var(--color-text-muted, #94a3b8);
}

.portal-card__pin {
    color: var(--color-cta, #f97316);
    font-weight: 600;
}

.portal-card__title {
    margin: 0;
    font-size: 15px;
    font-weight: 600;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.portal-card__summary {
    margin: 0;
    font-size: 13px;
    color: var(--color-text-secondary, #64748b);
    line-height: 1.55;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    flex: 1;
}

.portal-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.portal-list__item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 14px 16px;
    background: var(--color-surface, #fff);
    border: 1px solid var(--color-border, #e2e8f0);
    border-radius: 10px;
    text-decoration: none;
    color: inherit;
    transition: border-color 0.15s, background 0.15s;
}

.portal-list__item:hover {
    border-color: #bbf7d0;
    background: #f0fdf4;
}

.portal-list__item--notice:hover {
    border-color: #fde68a;
    background: #fffbeb;
}

.portal-list__icon {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    background: #dcfce7;
    color: #15803d;
}

.portal-list__item--notice .portal-list__icon {
    background: #fef3c7;
    color: #b45309;
}

.portal-list__icon svg {
    width: 16px;
    height: 16px;
}

.portal-list__main {
    flex: 1;
    min-width: 0;
}

.portal-list__title {
    margin: 0 0 4px;
    font-size: 14px;
    font-weight: 600;
    line-height: 1.4;
}

.portal-list__summary {
    margin: 0;
    font-size: 12px;
    color: var(--color-text-secondary, #64748b);
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.portal-list__date {
    font-size: 11px;
    color: var(--color-text-muted, #94a3b8);
    white-space: nowrap;
    flex-shrink: 0;
    padding-top: 2px;
}

.portal-empty {
    padding: 32px 16px;
    text-align: center;
    color: var(--color-text-muted, #94a3b8);
    font-size: 14px;
    background: var(--color-surface, #fff);
    border: 1px dashed var(--color-border, #e2e8f0);
    border-radius: 12px;
}

.portal-footer {
    border-top: 1px solid var(--color-border, #e2e8f0);
    background: var(--color-surface, #fff);
    margin-top: auto;
}

.portal-footer__inner {
    max-width: 1120px;
    margin: 0 auto;
    padding: 20px;
    text-align: center;
}

.portal-footer__copy {
    margin: 0;
    font-size: 12px;
    color: var(--color-text-muted, #94a3b8);
}

/* ===== 文章详情 ===== */
.portal-article {
    max-width: 760px;
    margin: 0 auto;
}

.portal-article__header {
    margin-bottom: 24px;
}

.portal-article__cat {
    display: inline-block;
    font-size: 11px;
    font-weight: 600;
    padding: 4px 10px;
    border-radius: 999px;
    background: #eff6ff;
    color: #1d4ed8;
    margin-bottom: 10px;
}

.portal-article__cat--help {
    background: #dcfce7;
    color: #15803d;
}

.portal-article__cat--notice {
    background: #fef3c7;
    color: #b45309;
}

.portal-article__title {
    margin: 0 0 10px;
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 700;
    line-height: 1.3;
    letter-spacing: -0.02em;
}

.portal-article__meta {
    font-size: 13px;
    color: var(--color-text-secondary, #64748b);
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.portal-article__cover {
    margin-bottom: 24px;
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--color-border, #e2e8f0);
}

.portal-article__cover img {
    width: 100%;
    display: block;
}

.portal-article__content {
    background: var(--color-surface, #fff);
    border: 1px solid var(--color-border, #e2e8f0);
    border-radius: 12px;
    padding: 24px 28px;
    font-size: 16px;
    line-height: 1.75;
    color: #334155;
}

.portal-article__content img {
    max-width: 100%;
    height: auto;
}

.portal-article__attachments {
    margin-top: 24px;
    padding: 16px 20px;
    background: var(--color-surface, #fff);
    border: 1px solid var(--color-border, #e2e8f0);
    border-radius: 12px;
}

.portal-article__attachments h3 {
    margin: 0 0 12px;
    font-size: 14px;
    font-weight: 700;
}

.portal-article__att-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.portal-article__att-list a {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: var(--color-primary, #2563eb);
    text-decoration: none;
}

.portal-article__att-list a:hover {
    text-decoration: underline;
}

.portal-not-found {
    text-align: center;
    padding: 60px 20px;
}

.portal-not-found h1 {
    margin: 0 0 12px;
    font-size: 20px;
}

.portal-not-found p {
    color: var(--color-text-secondary, #64748b);
    margin: 0 0 20px;
}

.portal-not-found a {
    color: var(--color-primary, #2563eb);
}

@media (max-width: 900px) {
    .portal-quick {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .portal-features__grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .portal-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 640px) {
    .portal-quick {
        grid-template-columns: 1fr;
    }

    .portal-features__grid {
        grid-template-columns: 1fr;
    }
    .portal-header__inner {
        flex-wrap: wrap;
        height: auto;
        padding: 10px 16px;
        gap: 8px;
    }

    .portal-nav {
        order: 3;
        width: 100%;
        flex-wrap: wrap;
    }

    .portal-header__user {
        margin-left: auto;
    }

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

    .portal-list__item {
        flex-wrap: wrap;
    }

    .portal-list__date {
        width: 100%;
        padding-top: 0;
    }

    .portal-article__content {
        padding: 16px 18px;
    }
}