:root {
    --page-bg: #f4f6f8;
    --surface: #ffffff;
    --surface-muted: #f8fafc;
    --ink: #0f172a;
    --ink-soft: #475569;
    --line: #d9e1ea;
    --line-strong: #b8c4d4;
    --accent: #1d4ed8;
    --success: #0f766e;
    --shadow: 0 16px 38px rgba(15, 23, 42, 0.06);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --container-max: 1180px;
}

html {
    scroll-behavior: smooth;
}

body {
    background: var(--page-bg);
    color: var(--ink);
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    font-size: 15px;
    line-height: 1.65;
    min-height: 100vh;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: var(--container-max);
}

a {
    color: inherit;
    text-decoration: none;
}

a:hover {
    color: inherit;
}

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

.section-shell {
    padding: 4.5rem 0;
}

.page-hero {
    padding-top: 3.5rem;
    padding-bottom: 3.5rem;
}

.site-header {
    background: rgba(244, 246, 248, 0.92);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid rgba(217, 225, 234, 0.85);
    transition: box-shadow 0.2s ease, background-color 0.2s ease;
}

.site-header.is-scrolled {
    box-shadow: 0 12px 30px rgba(15, 23, 42, 0.08);
    background: rgba(244, 246, 248, 0.97);
}

.navbar {
    padding: 1rem 0;
}

.navbar-toggler {
    border-color: var(--line);
    border-radius: var(--radius-sm);
    padding: 0.5rem 0.65rem;
}

.navbar-toggler:focus,
.btn:focus,
.form-control:focus,
.form-select:focus,
.filter-chip:focus,
a:focus-visible,
button:focus-visible {
    outline: none;
    box-shadow: 0 0 0 0.25rem rgba(29, 78, 216, 0.14);
}

.navbar-brand {
    color: var(--ink);
}

.brand-mark {
    width: 2.75rem;
    height: 2.75rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
    background: var(--ink);
    color: #ffffff;
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.14em;
}

.brand-mark--footer {
    width: 2.5rem;
    height: 2.5rem;
    background: #ffffff;
    color: var(--ink);
}

.brand-name {
    font-size: 0.95rem;
    font-weight: 700;
    letter-spacing: 0.02em;
}

.brand-subtitle,
.footer-muted,
.footer-small,
.mini-label,
.detail-label,
.panel-label,
.eyebrow,
.card-topline span,
.hero-proof span,
.service-badge {
    color: var(--ink-soft);
    font-size: 0.82rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.nav-link {
    font-size: 0.92rem;
    font-weight: 500;
    color: var(--ink-soft);
    padding: 0.55rem 0.9rem !important;
    border-radius: var(--radius-sm);
}

.nav-link:hover,
.nav-link.active {
    color: var(--ink);
    background: rgba(15, 23, 42, 0.05);
}

.btn {
    border-radius: 10px;
    font-weight: 600;
    padding: 0.82rem 1.15rem;
    border-width: 1px;
}

.btn-sm {
    padding: 0.55rem 0.9rem;
}

.btn-lg {
    padding: 0.95rem 1.3rem;
    font-size: 0.98rem;
}

.btn-primary {
    background: var(--ink);
    border-color: var(--ink);
}

.btn-primary:hover,
.btn-primary:focus {
    background: #09101d;
    border-color: #09101d;
}

.btn-outline-dark {
    border-color: var(--line-strong);
    color: var(--ink);
    background: transparent;
}

.btn-outline-dark:hover,
.btn-outline-dark:focus {
    background: var(--surface);
    border-color: var(--ink);
    color: var(--ink);
}

.hero-section {
    padding-top: 5rem;
    padding-bottom: 4rem;
}

.hero-title,
.section-title {
    font-size: clamp(2.3rem, 4.4vw, 4rem);
    line-height: 1.05;
    letter-spacing: -0.04em;
    font-weight: 700;
    margin: 0.85rem 0 1rem;
    max-width: 13ch;
}

.section-title {
    font-size: clamp(2rem, 3.6vw, 3.1rem);
    max-width: 15ch;
}

.hero-copy,
.section-copy,
.footer-copy,
.surface-panel p,
.service-card p,
.case-study-card p,
.insight-card p,
.empty-state p,
.message-panel p {
    color: var(--ink-soft);
    font-size: 1rem;
    max-width: 62ch;
}

.hero-proof span,
.service-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.45rem 0.75rem;
    border: 1px solid var(--line);
    background: var(--surface);
    border-radius: 999px;
    letter-spacing: 0.02em;
    text-transform: none;
    font-size: 0.85rem;
}

.hero-panel,
.surface-panel,
.metric-card,
.service-card,
.case-study-card,
.insight-card,
.process-card,
.cta-panel,
.empty-state {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
}

.surface-panel,
.service-card,
.case-study-card,
.insight-card,
.process-card,
.cta-panel,
.empty-state,
.metric-card {
    padding: 1.5rem;
}

.panel-heading {
    font-size: 1.1rem;
    font-weight: 700;
    margin-top: 0.65rem;
    margin-bottom: 1.2rem;
    max-width: 18ch;
}

.panel-stack {
    display: grid;
    gap: 0.85rem;
}

.panel-item {
    border: 1px solid var(--line);
    border-radius: var(--radius-md);
    padding: 0.95rem 1rem;
    background: var(--surface-muted);
}

.panel-item span,
.detail-label,
.panel-label {
    display: block;
    margin-bottom: 0.35rem;
}

.panel-item strong,
.metric-card strong,
.reference-code,
.detail-grid strong {
    font-size: 1rem;
    font-weight: 700;
    color: var(--ink);
}

.hero-note {
    margin-top: 1.1rem;
    color: var(--ink-soft);
    font-size: 0.95rem;
}

.stats-row {
    margin-top: 1.5rem;
}

.metric-card {
    height: 100%;
    background: rgba(255, 255, 255, 0.92);
}

.metric-card strong {
    display: block;
    font-size: 1.25rem;
    margin-bottom: 0.2rem;
    letter-spacing: -0.03em;
}

.metric-card span {
    display: block;
    color: var(--ink-soft);
    font-size: 0.92rem;
}

.section-heading-row {
    margin-bottom: 1rem;
}

.service-card,
.case-study-card,
.insight-card {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.service-card h3,
.case-study-card h3,
.insight-card h3,
.content-row h3,
.process-card h3,
.detail-list-item h2,
.article-section h2 {
    font-size: 1.12rem;
    line-height: 1.35;
    font-weight: 700;
    margin: 0;
    letter-spacing: -0.02em;
}

.service-points,
.detail-list,
.detail-grid,
.process-grid {
    display: grid;
    gap: 0.95rem;
}

.service-points li {
    position: relative;
    padding-left: 1.2rem;
    color: var(--ink-soft);
}

.service-points li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.62rem;
    width: 0.4rem;
    height: 0.4rem;
    border-radius: 999px;
    background: var(--ink);
}

.compact-panel .content-row,
.detail-list-item,
.article-section {
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--line);
    margin-bottom: 1rem;
}

.compact-panel .content-row:last-child,
.detail-list-item:last-child,
.article-section:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: 0;
}

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

.process-card {
    min-height: 100%;
}

.process-index {
    width: 2rem;
    height: 2rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 999px;
    background: var(--ink);
    color: #ffffff;
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    margin-bottom: 1rem;
}

.card-topline {
    display: flex;
    justify-content: space-between;
    gap: 0.75rem;
    align-items: center;
}

.result-pills {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
}

.result-pills span {
    display: inline-flex;
    align-items: center;
    padding: 0.48rem 0.72rem;
    border-radius: 999px;
    background: var(--surface-muted);
    border: 1px solid var(--line);
    color: var(--ink-soft);
    font-size: 0.88rem;
}

.result-pills--large span {
    font-size: 0.92rem;
}

.text-link,
.crumb-link {
    font-weight: 600;
    color: var(--ink);
}

.text-link:hover,
.crumb-link:hover {
    color: var(--accent);
}

.filter-toolbar {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.filter-chip {
    border: 1px solid var(--line);
    border-radius: 999px;
    background: var(--surface);
    color: var(--ink-soft);
    font-size: 0.88rem;
    padding: 0.6rem 0.9rem;
    font-weight: 600;
    transition: all 0.2s ease;
}

.filter-chip:hover,
.filter-chip.is-active {
    border-color: var(--ink);
    color: var(--ink);
    background: var(--surface-muted);
}

[data-filter-item].is-hidden {
    display: none !important;
}

.form-panel {
    padding: 1.75rem;
}

.form-label {
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--ink);
    margin-bottom: 0.45rem;
}

.form-control,
.form-select {
    min-height: 3rem;
    border-radius: 10px;
    border-color: var(--line-strong);
    background: var(--surface);
    color: var(--ink);
    padding: 0.75rem 0.9rem;
}

textarea.form-control {
    min-height: 10rem;
    resize: vertical;
}

.form-control::placeholder {
    color: #8fa0b5;
}

.reference-code {
    font-size: 1.5rem;
    letter-spacing: 0.08em;
}

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

.detail-grid > div,
.message-panel {
    border: 1px solid var(--line);
    border-radius: var(--radius-md);
    padding: 1rem;
    background: var(--surface-muted);
}

.message-panel p {
    margin: 0;
}

.quote-panel {
    border-left: 3px solid var(--ink);
    padding-left: 1rem;
}

.quote-panel p {
    font-size: 1.05rem;
    color: var(--ink);
    margin-bottom: 0.45rem;
}

.quote-panel span {
    color: var(--ink-soft);
    font-size: 0.9rem;
}

.cta-panel {
    display: flex;
    gap: 1.5rem;
    align-items: center;
    justify-content: space-between;
}

.site-footer {
    background: var(--ink);
    color: #ffffff;
    border-color: rgba(255, 255, 255, 0.08) !important;
}

.site-footer .footer-copy,
.site-footer .footer-muted,
.site-footer .footer-small,
.site-footer .footer-links a {
    color: rgba(255, 255, 255, 0.72);
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: flex-start;
}

.footer-links a:hover {
    color: #ffffff;
}

.site-toast {
    border: 1px solid rgba(15, 23, 42, 0.12);
    border-radius: 12px;
    box-shadow: 0 20px 40px rgba(15, 23, 42, 0.18);
}

.toast-header {
    background: #ffffff;
    color: var(--ink);
}

.toast-body {
    background: var(--surface);
    color: var(--ink-soft);
}

.toast-dot {
    width: 0.6rem;
    height: 0.6rem;
    border-radius: 999px;
    background: var(--success);
    display: inline-block;
    margin-right: 0.5rem;
}

.empty-state {
    text-align: center;
    padding: 2.5rem;
}

.empty-state--page {
    max-width: 720px;
    margin: 0 auto;
}

.empty-state h1,
.empty-state h2 {
    font-size: 1.8rem;
    line-height: 1.2;
    letter-spacing: -0.03em;
    margin-bottom: 0.75rem;
}

.article-panel {
    padding: 1.75rem;
}

.article-section p {
    margin-bottom: 0;
}

.alert {
    border-radius: 12px;
    border-width: 1px;
}

@media (max-width: 991.98px) {
    .section-shell {
        padding: 3.5rem 0;
    }

    .hero-section {
        padding-top: 4rem;
    }

    .process-grid,
    .detail-grid {
        grid-template-columns: 1fr;
    }

    .cta-panel {
        flex-direction: column;
        align-items: flex-start;
    }

    .footer-links {
        justify-content: flex-start;
    }
}

@media (max-width: 767.98px) {
    .section-title,
    .hero-title {
        max-width: none;
    }

    .surface-panel,
    .service-card,
    .case-study-card,
    .insight-card,
    .process-card,
    .cta-panel,
    .empty-state,
    .metric-card {
        padding: 1.25rem;
    }

    .hero-proof {
        gap: 0.55rem !important;
    }

    .hero-proof span,
    .service-badge {
        width: 100%;
        justify-content: flex-start;
    }
}