:root {
    --canvas: #f7f7f4;
    --canvas-soft: #fafaf7;
    --surface-card: #ffffff;
    --surface-strong: #e6e5e0;
    --primary: #f54e00;
    --primary-active: #d04200;
    --ink: #26251e;
    --body: #5a5852;
    --body-strong: #26251e;
    --muted: #807d72;
    --muted-soft: #a09c92;
    --on-primary: #ffffff;
    --hairline: #e6e5e0;
    --hairline-soft: #efeee8;
    --hairline-strong: #cfcdc4;
    --success: #1f8a65;
    --error: #cf2d56;
    --rounded-xs: 4px;
    --rounded-sm: 6px;
    --rounded-md: 8px;
    --rounded-lg: 12px;
    --rounded-xl: 16px;
    --rounded-pill: 9999px;
    --spacing-xxs: 4px;
    --spacing-xs: 8px;
    --spacing-sm: 12px;
    --spacing-base: 16px;
    --spacing-md: 20px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-xxl: 48px;
    --spacing-section: 80px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 16px; scroll-behavior: smooth; }

body {
    font-family: 'Inter', system-ui, 'Helvetica Neue', Helvetica, Arial, sans-serif;
    font-size: 16px;
    font-weight: 400;
    line-height: 1.5;
    color: var(--body);
    background-color: var(--canvas);
}

a { color: var(--ink); text-decoration: none; }
a:hover { color: var(--primary); }

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

address { font-style: normal; }

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
}

.site-header {
    background: var(--canvas);
    border-bottom: 1px solid var(--hairline);
    position: sticky;
    top: 0;
    z-index: 100;
    height: 64px;
}

.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.nav-logo {
    font-size: 18px;
    font-weight: 600;
    color: var(--ink);
    letter-spacing: -0.1px;
    flex-shrink: 0;
}

.nav-logo:hover { color: var(--primary); }

.nav-menu ul {
    display: flex;
    list-style: none;
    gap: var(--spacing-xl);
    align-items: center;
}

.nav-menu a {
    font-size: 14px;
    font-weight: 500;
    color: var(--body);
    transition: color 0.15s;
}

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--ink);
}

.has-dropdown { position: relative; }

.has-dropdown > a::after {
    content: ' ▾';
    font-size: 10px;
}

.dropdown {
    display: none;
    position: absolute;
    top: calc(100% + 8px);
    left: 0;
    background: var(--surface-card);
    border: 1px solid var(--hairline);
    border-radius: var(--rounded-lg);
    min-width: 220px;
    flex-direction: column;
    gap: 0;
    padding: var(--spacing-xs) 0;
    z-index: 200;
    box-shadow: none;
}

.has-dropdown:hover .dropdown { display: flex; }

.dropdown li { list-style: none; }

.dropdown li a {
    display: block;
    padding: var(--spacing-xs) var(--spacing-base);
    font-size: 14px;
    white-space: nowrap;
    color: var(--body);
}

.dropdown li a:hover { color: var(--ink); background: var(--canvas-soft); }

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.nav-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--ink);
    border-radius: 2px;
    transition: all 0.2s;
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--primary);
    color: var(--on-primary);
    font-size: 14px;
    font-weight: 500;
    padding: 10px 18px;
    height: 40px;
    border-radius: var(--rounded-md);
    border: none;
    cursor: pointer;
    transition: background 0.15s;
    text-decoration: none;
}

.btn-primary:hover { background: var(--primary-active); color: var(--on-primary); }

.btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--surface-card);
    color: var(--ink);
    font-size: 14px;
    font-weight: 500;
    padding: 10px 18px;
    height: 40px;
    border-radius: var(--rounded-md);
    border: 1px solid var(--hairline-strong);
    cursor: pointer;
    transition: border-color 0.15s;
    text-decoration: none;
}

.btn-secondary:hover { border-color: var(--ink); color: var(--ink); }

.hero-band {
    padding: var(--spacing-section) 0;
    background: var(--canvas);
    border-bottom: 1px solid var(--hairline);
}

.hero-inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xxl);
    align-items: center;
}

.hero-content h1 {
    font-size: 48px;
    font-weight: 400;
    line-height: 1.1;
    letter-spacing: -1.2px;
    color: var(--ink);
    margin-bottom: var(--spacing-lg);
}

.hero-content p {
    font-size: 16px;
    line-height: 1.6;
    color: var(--body);
    margin-bottom: var(--spacing-xl);
    max-width: 480px;
}

.hero-actions {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.hero-image {
    border-radius: var(--rounded-lg);
    overflow: hidden;
    border: 1px solid var(--hairline);
}

.hero-image img {
    width: 100%;
    height: 360px;
    object-fit: cover;
}

.section {
    padding: var(--spacing-section) 0;
}

.section-alt {
    background: var(--canvas-soft);
    border-top: 1px solid var(--hairline-soft);
    border-bottom: 1px solid var(--hairline-soft);
}

.section-label {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.88px;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: var(--spacing-sm);
}

.section-title {
    font-size: 36px;
    font-weight: 400;
    line-height: 1.2;
    letter-spacing: -0.72px;
    color: var(--ink);
    margin-bottom: var(--spacing-base);
}

.section-subtitle {
    font-size: 16px;
    line-height: 1.6;
    color: var(--body);
    max-width: 560px;
    margin-bottom: var(--spacing-xxl);
}

.card-grid {
    display: grid;
    gap: var(--spacing-lg);
}

.card-grid-3 { grid-template-columns: repeat(3, 1fr); }
.card-grid-2 { grid-template-columns: repeat(2, 1fr); }

.feature-card {
    background: var(--surface-card);
    border: 1px solid var(--hairline);
    border-radius: var(--rounded-lg);
    padding: var(--spacing-lg);
}

.feature-card h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--ink);
    margin-bottom: var(--spacing-xs);
}

.feature-card p {
    font-size: 14px;
    line-height: 1.6;
    color: var(--body);
}

.article-card {
    background: var(--surface-card);
    border: 1px solid var(--hairline);
    border-radius: var(--rounded-lg);
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.article-card-img {
    height: 220px;
    object-fit: cover;
    width: 100%;
}

.article-card-body {
    padding: var(--spacing-lg);
    flex: 1;
    display: flex;
    flex-direction: column;
}

.article-card-body .badge {
    display: inline-block;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.88px;
    text-transform: uppercase;
    background: var(--surface-strong);
    color: var(--ink);
    border-radius: var(--rounded-pill);
    padding: 4px 10px;
    margin-bottom: var(--spacing-xs);
    align-self: flex-start;
}

.article-card-body h3 {
    font-size: 20px;
    font-weight: 400;
    letter-spacing: -0.1px;
    color: var(--ink);
    margin-bottom: var(--spacing-xs);
    line-height: 1.3;
}

.article-card-body p {
    font-size: 14px;
    line-height: 1.6;
    color: var(--body);
    flex: 1;
    margin-bottom: var(--spacing-base);
}

.article-card-body .read-link {
    font-size: 14px;
    font-weight: 500;
    color: var(--primary);
    align-self: flex-start;
}

.article-card-body .read-link:hover { color: var(--primary-active); }

.page-hero {
    padding: var(--spacing-xxl) 0;
    border-bottom: 1px solid var(--hairline);
}

.page-hero .section-label { margin-bottom: var(--spacing-xs); }

.page-hero h1 {
    font-size: 42px;
    font-weight: 400;
    letter-spacing: -1px;
    color: var(--ink);
    margin-bottom: var(--spacing-base);
    line-height: 1.15;
}

.page-hero p {
    font-size: 16px;
    line-height: 1.6;
    color: var(--body);
    max-width: 640px;
}

.article-content {
    max-width: 780px;
}

.article-content h2 {
    font-size: 28px;
    font-weight: 400;
    letter-spacing: -0.5px;
    color: var(--ink);
    margin: var(--spacing-xxl) 0 var(--spacing-base);
    line-height: 1.25;
}

.article-content h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--ink);
    margin: var(--spacing-xl) 0 var(--spacing-xs);
    line-height: 1.4;
}

.article-content p {
    font-size: 16px;
    line-height: 1.7;
    color: var(--body);
    margin-bottom: var(--spacing-base);
}

.article-content ul,
.article-content ol {
    padding-left: var(--spacing-xl);
    margin-bottom: var(--spacing-base);
}

.article-content li {
    font-size: 16px;
    line-height: 1.7;
    color: var(--body);
    margin-bottom: var(--spacing-xxs);
}

.article-content strong { color: var(--ink); font-weight: 600; }

.article-content a { color: var(--primary); }
.article-content a:hover { color: var(--primary-active); }

.article-figure {
    margin: var(--spacing-xl) 0;
    border: 1px solid var(--hairline);
    border-radius: var(--rounded-lg);
    overflow: hidden;
}

.article-figure img {
    width: 100%;
    max-height: 480px;
    object-fit: cover;
}

.article-figure figcaption {
    font-size: 13px;
    color: var(--muted);
    padding: var(--spacing-xs) var(--spacing-base);
    background: var(--canvas-soft);
    border-top: 1px solid var(--hairline-soft);
}

.info-box {
    background: var(--surface-card);
    border: 1px solid var(--hairline);
    border-left: 3px solid var(--primary);
    border-radius: var(--rounded-md);
    padding: var(--spacing-base) var(--spacing-lg);
    margin: var(--spacing-xl) 0;
}

.info-box p {
    font-size: 14px;
    color: var(--body);
    margin-bottom: 0;
}

.article-meta {
    font-size: 13px;
    color: var(--muted);
    margin-bottom: var(--spacing-xl);
    display: flex;
    gap: var(--spacing-base);
    flex-wrap: wrap;
}

.article-layout {
    display: grid;
    grid-template-columns: 1fr 280px;
    gap: var(--spacing-xxl);
    align-items: start;
}

.article-sidebar {
    position: sticky;
    top: 80px;
}

.sidebar-card {
    background: var(--surface-card);
    border: 1px solid var(--hairline);
    border-radius: var(--rounded-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-base);
}

.sidebar-card h4 {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.88px;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: var(--spacing-base);
}

.sidebar-card ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.sidebar-card li {
    border-bottom: 1px solid var(--hairline-soft);
    padding: var(--spacing-xs) 0;
}

.sidebar-card li:last-child { border-bottom: none; }

.sidebar-card a {
    font-size: 14px;
    color: var(--body);
}

.sidebar-card a:hover { color: var(--primary); }

.contact-section {
    padding: var(--spacing-section) 0;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xxl);
    align-items: start;
}

.contact-info h2 {
    font-size: 32px;
    font-weight: 400;
    letter-spacing: -0.6px;
    color: var(--ink);
    margin-bottom: var(--spacing-base);
}

.contact-info p {
    font-size: 16px;
    line-height: 1.6;
    color: var(--body);
    margin-bottom: var(--spacing-base);
}

.contact-detail {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-xl);
}

.contact-detail dt {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.88px;
    text-transform: uppercase;
    color: var(--muted);
}

.contact-detail dd {
    font-size: 14px;
    color: var(--body);
    margin-bottom: var(--spacing-xs);
}

.contact-form-card {
    background: var(--surface-card);
    border: 1px solid var(--hairline);
    border-radius: var(--rounded-lg);
    padding: var(--spacing-xxl);
}

.form-group {
    margin-bottom: var(--spacing-base);
}

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--ink);
    margin-bottom: var(--spacing-xxs);
}

.form-group input,
.form-group textarea {
    width: 100%;
    background: var(--surface-card);
    color: var(--ink);
    font-family: inherit;
    font-size: 16px;
    padding: 12px 16px;
    height: 44px;
    border: 1px solid var(--hairline-strong);
    border-radius: var(--rounded-md);
    outline: none;
    transition: border-color 0.15s;
}

.form-group textarea {
    height: 120px;
    resize: vertical;
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--ink);
}

.form-msg {
    display: none;
    padding: var(--spacing-base);
    border-radius: var(--rounded-md);
    font-size: 14px;
    margin-top: var(--spacing-base);
}

.form-msg.success {
    background: #edf7f3;
    color: var(--success);
    border: 1px solid #b6e0d2;
}

.site-footer {
    background: var(--canvas);
    border-top: 1px solid var(--hairline);
    padding: var(--spacing-section) 0 0;
}

.footer-inner {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
    gap: var(--spacing-xxl);
    padding-bottom: var(--spacing-xxl);
}

.footer-logo {
    font-size: 18px;
    font-weight: 600;
    color: var(--ink);
    display: block;
    margin-bottom: var(--spacing-base);
}

.footer-brand p {
    font-size: 14px;
    line-height: 1.6;
    color: var(--body);
}

.footer-col h4 {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.88px;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: var(--spacing-base);
}

.footer-col ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.footer-col a {
    font-size: 14px;
    color: var(--body);
}

.footer-col a:hover { color: var(--ink); }

.footer-col address p {
    font-size: 14px;
    color: var(--body);
    line-height: 1.6;
    margin-bottom: var(--spacing-xs);
}

.footer-bottom {
    border-top: 1px solid var(--hairline);
    padding: var(--spacing-lg) 0;
}

.footer-bottom p {
    font-size: 13px;
    color: var(--muted);
}

.footer-bottom a { color: var(--muted); text-decoration: underline; }

.cookie-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--surface-card);
    border-top: 1px solid var(--hairline);
    z-index: 999;
    padding: var(--spacing-base) var(--spacing-xl);
}

.cookie-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-xl);
}

.cookie-inner p {
    font-size: 14px;
    color: var(--body);
}

.cookie-inner a { color: var(--primary); }

.cookie-btns {
    display: flex;
    gap: var(--spacing-xs);
    flex-shrink: 0;
}

.breadcrumb {
    font-size: 13px;
    color: var(--muted);
    margin-bottom: var(--spacing-xl);
    display: flex;
    gap: var(--spacing-xs);
    align-items: center;
    flex-wrap: wrap;
}

.breadcrumb a { color: var(--muted); }
.breadcrumb a:hover { color: var(--ink); }
.breadcrumb span { color: var(--muted-soft); }

.prose h2 {
    font-size: 28px;
    font-weight: 400;
    letter-spacing: -0.5px;
    color: var(--ink);
    margin: var(--spacing-xxl) 0 var(--spacing-base);
    line-height: 1.25;
}

.prose h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--ink);
    margin: var(--spacing-xl) 0 var(--spacing-xs);
}

.prose p {
    font-size: 16px;
    line-height: 1.7;
    color: var(--body);
    margin-bottom: var(--spacing-base);
}

.prose ul, .prose ol {
    padding-left: var(--spacing-xl);
    margin-bottom: var(--spacing-base);
}

.prose li {
    font-size: 16px;
    line-height: 1.7;
    color: var(--body);
    margin-bottom: var(--spacing-xxs);
}

.prose strong { color: var(--ink); font-weight: 600; }
.prose a { color: var(--primary); }
.prose a:hover { color: var(--primary-active); }

.update-date {
    font-size: 13px;
    color: var(--muted);
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-base);
    border-top: 1px solid var(--hairline-soft);
}

@media (max-width: 1024px) {
    .hero-inner { grid-template-columns: 1fr; }
    .hero-content h1 { font-size: 40px; }
    .hero-image { display: none; }
    .article-layout { grid-template-columns: 1fr; }
    .article-sidebar { position: static; }
    .footer-inner { grid-template-columns: 1fr 1fr; gap: var(--spacing-xl); }
    .footer-col.footer-brand { grid-column: 1 / -1; }
    .card-grid-3 { grid-template-columns: repeat(2, 1fr); }
    .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    .nav-menu { display: none; }
    .nav-menu.open {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 64px;
        left: 0;
        right: 0;
        background: var(--surface-card);
        border-bottom: 1px solid var(--hairline);
        padding: var(--spacing-base) var(--spacing-xl);
    }
    .nav-menu.open ul {
        flex-direction: column;
        gap: 0;
    }
    .nav-menu.open ul li a {
        display: block;
        padding: var(--spacing-xs) 0;
        border-bottom: 1px solid var(--hairline-soft);
    }
    .nav-menu.open .dropdown {
        display: flex;
        position: static;
        border: none;
        padding: 0 0 0 var(--spacing-base);
        min-width: auto;
    }
    .nav-toggle { display: flex; }
    .site-header { position: relative; }
    .nav-inner { position: relative; }
    .card-grid-3 { grid-template-columns: 1fr; }
    .card-grid-2 { grid-template-columns: 1fr; }
    .hero-content h1 { font-size: 32px; letter-spacing: -0.5px; }
    .section-title { font-size: 28px; }
    .page-hero h1 { font-size: 32px; }
    .footer-inner { grid-template-columns: 1fr; }
    .footer-col.footer-brand { grid-column: auto; }
    .cookie-inner { flex-direction: column; align-items: flex-start; }
    .section { padding: 48px 0; }
    .hero-band { padding: 48px 0; }
    .container { padding: 0 var(--spacing-base); }
}