:root {
    --gsu-primary: #173F7A;
    --gsu-secondary: #0F2C56;
    --gsu-accent: #F6B019;
    --gsu-border: #DDE8F6;
    --gsu-text: #344256;
    --gsu-muted: #66758A;
    --gsu-card: #FFFFFF;
    --gsu-shadow-sm: 0 10px 28px rgba(17, 55, 111, .08);
    --gsu-shadow-md: 0 20px 50px rgba(17, 55, 111, .14);
}

.fade-up {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity .55s ease, transform .55s ease;
}

.fade-up.is-visible {
    opacity: 1;
    transform: translateY(0);
}

.fade-up--delay {
    transition-delay: .14s;
}

.fade-up--delay-2 {
    transition-delay: .28s;
}

.gsu-page {
    background:
        radial-gradient(circle at top left, rgba(246, 176, 25, .08), transparent 26%),
        linear-gradient(180deg, #FFFFFF 0%, #F9FBFF 34%, #FFFFFF 100%);
}

.gsu-shell {
    padding: 20px 0 56px;
}

.gsu-breadcrumb {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    align-items: center;
    margin-bottom: 16px;
    color: var(--gsu-muted);
    font-size: .88rem;
}

.gsu-breadcrumb a {
    color: var(--gsu-muted);
}

.gsu-breadcrumb a:hover {
    color: var(--gsu-primary);
}

.gsu-layout {
    display: grid;
    grid-template-columns: minmax(0, 1.8fr) minmax(300px, .9fr);
    gap: 26px;
    align-items: start;
}

.gsu-main {
    min-width: 0;
}

.gsu-tag {
    display: inline-flex;
    padding: 7px 14px;
    border-radius: 999px;
    background: var(--gsu-accent);
    color: #FFFFFF;
    text-transform: uppercase;
    letter-spacing: .08em;
    font-size: .78rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.gsu-head h1 {
    margin: 0;
    color: var(--gsu-primary);
    font-size: clamp(2rem, 3.05vw, 3.52rem);
    line-height: 1.12;
    max-width: 860px;
}

.gsu-subtitle {
    margin: 12px 0 0;
    color: var(--gsu-secondary);
    font-size: 1.28rem;
    line-height: 1.35;
    font-weight: 700;
    max-width: 820px;
}

.gsu-meta {
    margin-top: 18px;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 14px;
    color: var(--gsu-muted);
}

.gsu-author {
    display: flex;
    align-items: center;
    gap: 10px;
}

.gsu-author img {
    width: 46px;
    height: 46px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid #FFFFFF;
    box-shadow: var(--gsu-shadow-sm);
}

.gsu-author span {
    color: var(--gsu-text);
    font-size: .95rem;
}

.gsu-dot {
    width: 1px;
    height: 18px;
    background: var(--gsu-border);
}

.gsu-hero {
    margin-top: 18px;
    border-radius: 24px;
    overflow: hidden;
    box-shadow: var(--gsu-shadow-md);
}

.gsu-hero img {
    width: 100%;
    max-height: 470px;
    object-fit: cover;
    display: block;
}

.gsu-section {
    margin-top: 20px;
}

.gsu-section h2 {
    margin: 0;
    color: var(--gsu-primary);
    font-size: clamp(1.55rem, 2.2vw, 2.2rem);
    line-height: 1.2;
}

.gsu-section p {
    margin: 10px 0 0;
    color: var(--gsu-text);
    line-height: 1.8;
}

.gsu-mini-grid {
    margin-top: 12px;
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 10px;
}

.gsu-mini-grid article {
    border: 1px solid var(--gsu-border);
    border-radius: 12px;
    background: #FFFFFF;
    padding: 12px;
    text-align: center;
}

.gsu-mini-grid i {
    color: var(--gsu-primary);
    font-size: 1.3rem;
}

.gsu-mini-grid p {
    margin-top: 8px;
    line-height: 1.5;
    font-size: .92rem;
    color: var(--gsu-secondary);
    font-weight: 700;
}

.gsu-instead {
    background: #FFF9EC !important;
    border-color: #F3D28E !important;
}

.gsu-instead h3 {
    margin: 8px 0 0;
    color: #B97300;
    font-size: 1rem;
}

.gsu-step-row {
    margin-top: 12px;
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 10px;
}

.gsu-step-row article {
    border: 1px solid var(--gsu-border);
    border-radius: 12px;
    background: #FFFFFF;
    padding: 12px;
}

.gsu-step-row span {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background: #EEF4FF;
    color: var(--gsu-primary);
    display: grid;
    place-items: center;
    font-weight: 800;
    margin-bottom: 8px;
}

.gsu-step-row h3 {
    margin: 0;
    color: var(--gsu-primary);
    font-size: .96rem;
    line-height: 1.35;
}

.gsu-note {
    margin-top: 12px;
    padding: 10px 12px;
    border-radius: 10px;
    background: #ECF4FF;
    color: var(--gsu-primary);
    font-weight: 600;
}

.gsu-note i {
    margin-right: 8px;
}

.gsu-chapter-card {
    border: 1px solid var(--gsu-border);
    border-radius: 14px;
    background: #FFFFFF;
    padding: 14px;
}

.gsu-chapter-grid {
    margin-top: 12px;
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 10px;
}

.gsu-chapter-grid--three {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.gsu-chapter-grid article {
    border: 1px solid #E8EEF9;
    border-radius: 10px;
    background: #FBFDFF;
    padding: 11px;
}

.gsu-chapter-grid h4 {
    margin: 0;
    color: var(--gsu-primary);
    font-size: .95rem;
    line-height: 1.35;
}

.gsu-chapter-grid p {
    margin-top: 8px;
    font-size: .92rem;
    line-height: 1.65;
}

.gsu-chapter-grid ul {
    margin: 8px 0 0;
    padding-left: 18px;
    line-height: 1.65;
}

.gsu-equal-text-col ul,
.gsu-equal-text-col li {
    font-size: .92rem;
    color: var(--gsu-text);
}

.gsu-four-grid {
    margin-top: 12px;
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 10px;
}

.gsu-four-grid article {
    border: 1px solid var(--gsu-border);
    border-radius: 10px;
    background: #FFFFFF;
    padding: 11px;
}

.gsu-four-grid h4 {
    margin: 0;
    color: var(--gsu-primary);
    font-size: .95rem;
}

.gsu-four-grid p {
    margin-top: 8px;
    font-size: .9rem;
    line-height: 1.6;
}

.gsu-two-col-cards {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
}

.gsu-list-card {
    border-radius: 14px;
    border: 1px solid var(--gsu-border);
    background: #FFFFFF;
    padding: 14px;
}

.gsu-list-card h3 {
    margin: 0;
    color: var(--gsu-primary);
    font-size: 1.12rem;
}

.gsu-list-card h3 i {
    margin-right: 8px;
}

.gsu-list-card--warn {
    background: #FFF9EC;
    border-color: #F3D28E;
}

.gsu-list-card--ok {
    background: #EFFAF2;
    border-color: #B7E1C0;
}

.gsu-list-card ul {
    margin: 10px 0 0;
    padding-left: 18px;
    line-height: 1.7;
}

.gsu-reference-card {
    border: 1px solid var(--gsu-border);
    border-radius: 14px;
    background: #F8FBFF;
    padding: 14px;
}

.gsu-reference-card h3 {
    margin: 0;
    color: var(--gsu-primary);
    font-size: 1.12rem;
}

.gsu-reference-card h3 i {
    margin-right: 8px;
}

.gsu-reference-card ul {
    margin: 10px 0 0;
    padding-left: 18px;
    line-height: 1.7;
}

.gsu-sidebar {
    position: sticky;
    top: calc(var(--header-height) + 16px);
}

.gsu-card {
    background: var(--gsu-card);
    border: 1px solid var(--gsu-border);
    border-radius: 20px;
    box-shadow: var(--gsu-shadow-sm);
    padding: 22px;
}

.gsu-card + .gsu-card {
    margin-top: 14px;
}

.gsu-card-head {
    display: flex;
    align-items: center;
    gap: 10px;
    border-bottom: 1px solid var(--gsu-border);
    padding-bottom: 12px;
    margin-bottom: 14px;
}

.gsu-card-head i {
    width: 42px;
    height: 42px;
    border-radius: 12px;
    display: grid;
    place-items: center;
    background: #EEF4FF;
    color: var(--gsu-primary);
}

.gsu-card-head h3 {
    margin: 0;
    color: var(--gsu-primary);
    font-size: 1.25rem;
}

.gsu-checklist,
.gsu-related {
    display: grid;
    gap: 12px;
}

.gsu-checklist a {
    display: block;
    color: var(--gsu-text);
    line-height: 1.6;
    padding-left: 22px;
    position: relative;
}

.gsu-checklist a::before {
    content: '\f00c';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    position: absolute;
    left: 0;
    top: 1px;
    color: var(--gsu-primary);
    font-size: .82rem;
}

.gsu-quote-card {
    background: #FFF9EC;
    border-color: #F3D28E;
}

.gsu-quote-card i {
    color: var(--gsu-accent);
    font-size: 1.5rem;
}

.gsu-quote-card p {
    margin-top: 8px;
    color: var(--gsu-primary);
    font-weight: 700;
    line-height: 1.6;
}

.gsu-perspective-head {
    display: grid;
    grid-template-columns: 56px 1fr;
    gap: 10px;
    align-items: center;
}

.gsu-perspective-head img {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    object-fit: cover;
}

.gsu-perspective-head h4 {
    margin: 0;
    color: var(--gsu-primary);
    font-size: 1.08rem;
}

.gsu-perspective-head span {
    color: var(--gsu-muted);
    font-size: .86rem;
}

.gsu-perspective-card p {
    margin: 10px 0 0;
    color: var(--gsu-text);
    line-height: 1.65;
}

.gsu-perspective-card .sign {
    display: inline-block;
    margin-top: 10px;
    color: var(--gsu-primary);
    font-family: 'Caveat', cursive;
    font-size: 1.9rem;
    line-height: 1;
}

.gsu-facts article {
    display: grid;
    grid-template-columns: 24px 1fr;
    gap: 10px;
    align-items: start;
}

.gsu-facts article + article {
    margin-top: 14px;
}

.gsu-facts i {
    color: var(--gsu-accent);
    font-size: 1.2rem;
    margin-top: 2px;
}

.gsu-facts p {
    margin: 0;
    color: var(--gsu-text);
    line-height: 1.7;
}

.gsu-related-item {
    display: grid;
    grid-template-columns: 84px 1fr;
    gap: 10px;
    align-items: center;
}

.gsu-related-item img {
    width: 84px;
    height: 64px;
    border-radius: 10px;
    object-fit: cover;
}

.gsu-related-item a {
    color: var(--gsu-primary);
    font-weight: 700;
    line-height: 1.35;
    font-size: .95rem;
}

.gsu-related-item span {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-top: 6px;
    color: var(--gsu-muted);
    font-size: .84rem;
}

.gsu-bottom-banner {
    margin-top: 18px;
    background: linear-gradient(135deg, #12376E 0%, #1B4D94 100%);
    color: #FFFFFF;
    border-radius: 18px;
    padding: 24px;
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 22px;
    align-items: center;
}

.gsu-bottom-copy h3 {
    margin: 0;
    font-size: clamp(1.3rem, 2vw, 1.95rem);
    line-height: 1.2;
    color: #FFFFFF;
}

.gsu-bottom-copy p {
    margin: 8px 0 0;
    line-height: 1.7;
    color: rgba(255, 255, 255, .9);
}

.gsu-bottom-actions {
    width: min(360px, 100%);
    display: grid;
    gap: 10px;
}

.gsu-bottom-actions .btn-primary,
.gsu-bottom-actions .btn-secondary {
    width: 100%;
}

@media (max-width: 1120px) {
    .gsu-layout {
        grid-template-columns: 1fr;
    }

    .gsu-sidebar {
        position: static;
    }
}

@media (max-width: 860px) {
    .gsu-mini-grid,
    .gsu-step-row,
    .gsu-chapter-grid,
    .gsu-four-grid,
    .gsu-two-col-cards {
        grid-template-columns: 1fr 1fr;
    }

    .gsu-bottom-banner {
        grid-template-columns: 1fr;
    }

    .gsu-bottom-actions {
        width: 100%;
    }
}

@media (max-width: 760px) {
    .gsu-subtitle {
        font-size: 1.12rem;
    }

    .gsu-mini-grid,
    .gsu-step-row,
    .gsu-chapter-grid,
    .gsu-four-grid,
    .gsu-two-col-cards {
        grid-template-columns: 1fr;
    }

    .gsu-hero img {
        max-height: none;
    }
}