: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;
    --semantic-success: #1f8a65;
    --semantic-error: #cf2d56;
    --rounded-xs: 4px;
    --rounded-sm: 6px;
    --rounded-md: 8px;
    --rounded-lg: 12px;
    --rounded-xl: 16px;
    --rounded-pill: 9999px;
}

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

html { scroll-behavior: smooth; }

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

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

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

h1, h2, h3, h4, h5, h6 {
    color: var(--ink);
    font-weight: 400;
    line-height: 1.2;
    letter-spacing: -0.5px;
}

h1 { font-size: 48px; letter-spacing: -1.2px; line-height: 1.1; }
h2 { font-size: 36px; letter-spacing: -0.72px; }
h3 { font-size: 26px; letter-spacing: -0.325px; line-height: 1.25; }
h4 { font-size: 18px; font-weight: 600; letter-spacing: 0; line-height: 1.4; }

p { color: var(--body); line-height: 1.6; margin-bottom: 16px; }
p:last-child { margin-bottom: 0; }

ul, ol { padding-left: 20px; color: var(--body); line-height: 1.7; }
li { margin-bottom: 4px; }

address { font-style: normal; }

.btn-primary {
    display: inline-block;
    background: var(--primary);
    color: var(--on-primary);
    font-size: 14px;
    font-weight: 500;
    line-height: 1.0;
    padding: 10px 18px;
    height: 40px;
    border-radius: var(--rounded-md);
    border: none;
    cursor: pointer;
    transition: background 0.15s;
    text-align: center;
}
.btn-primary:hover { background: var(--primary-active); color: var(--on-primary); }

.btn-secondary {
    display: inline-block;
    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: background 0.15s;
    text-align: center;
}
.btn-secondary:hover { background: var(--canvas-soft); color: var(--ink); }

.site-header {
    background: var(--canvas);
    border-bottom: 1px solid var(--hairline);
    position: sticky;
    top: 0;
    z-index: 100;
    height: 64px;
}
.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}
.site-logo {
    font-size: 18px;
    font-weight: 600;
    color: var(--ink);
    letter-spacing: -0.3px;
}
.site-logo:hover { color: var(--primary); }

.site-nav ul {
    list-style: none;
    padding: 0;
    display: flex;
    align-items: center;
    gap: 8px;
    margin: 0;
}
.site-nav ul li { margin: 0; }
.site-nav ul li a {
    font-size: 14px;
    font-weight: 500;
    color: var(--body-strong);
    padding: 6px 10px;
    border-radius: var(--rounded-sm);
    transition: color 0.15s, background 0.15s;
}
.site-nav ul li a:hover, .site-nav ul li a.active {
    color: var(--primary);
    background: var(--hairline-soft);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 24px;
    height: 18px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
}
.nav-toggle span {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--ink);
    border-radius: 2px;
    transition: 0.3s;
}

.hero-band {
    padding: 80px 0;
    background: var(--canvas);
    border-bottom: 1px solid var(--hairline);
}
.hero-band .hero-label {
    display: inline-block;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.88px;
    text-transform: uppercase;
    color: var(--muted);
    background: var(--surface-strong);
    border-radius: var(--rounded-pill);
    padding: 4px 10px;
    margin-bottom: 24px;
}
.hero-band h1 { margin-bottom: 20px; max-width: 700px; }
.hero-band .hero-sub {
    font-size: 18px;
    color: var(--body);
    max-width: 560px;
    margin-bottom: 32px;
    line-height: 1.6;
}
.hero-image-wrap {
    margin-top: 48px;
    border-radius: var(--rounded-lg);
    overflow: hidden;
    border: 1px solid var(--hairline);
    max-height: 480px;
}
.hero-image-wrap img {
    width: 100%;
    height: 480px;
    object-fit: cover;
}

.section {
    padding: 80px 0;
}
.section-label {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.88px;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 12px;
    display: block;
}
.section-title { margin-bottom: 16px; }
.section-sub { font-size: 16px; color: var(--body); max-width: 560px; margin-bottom: 48px; }

.section-divider {
    border: none;
    border-top: 1px solid var(--hairline);
}

.cards-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}
.cards-grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.feature-card {
    background: var(--surface-card);
    border: 1px solid var(--hairline);
    border-radius: var(--rounded-lg);
    padding: 24px;
}
.feature-card h4 { margin-bottom: 8px; }
.feature-card p { font-size: 14px; margin: 0; }

.article-card {
    background: var(--surface-card);
    border: 1px solid var(--hairline);
    border-radius: var(--rounded-lg);
    overflow: hidden;
    transition: border-color 0.15s;
}
.article-card:hover { border-color: var(--hairline-strong); }
.article-card-img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}
.article-card-body { padding: 20px 24px 24px; }
.article-card-tag {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.88px;
    text-transform: uppercase;
    color: var(--muted);
    background: var(--surface-strong);
    border-radius: var(--rounded-pill);
    padding: 4px 10px;
    display: inline-block;
    margin-bottom: 12px;
}
.article-card h3 { font-size: 20px; margin-bottom: 8px; letter-spacing: -0.2px; }
.article-card p { font-size: 14px; margin-bottom: 16px; }
.article-card-link {
    font-size: 14px;
    font-weight: 500;
    color: var(--primary);
    border-bottom: 1px solid transparent;
    transition: border-color 0.15s;
}
.article-card-link:hover { border-color: var(--primary); }

.article-header {
    padding: 60px 0 40px;
    border-bottom: 1px solid var(--hairline);
}
.article-header .article-tag {
    display: inline-block;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.88px;
    text-transform: uppercase;
    color: var(--muted);
    background: var(--surface-strong);
    border-radius: var(--rounded-pill);
    padding: 4px 10px;
    margin-bottom: 20px;
}
.article-header h1 { font-size: 40px; max-width: 720px; margin-bottom: 16px; }
.article-header .article-meta { font-size: 14px; color: var(--muted); }

.article-body {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 48px;
    padding: 48px 0 80px;
    align-items: start;
}
.article-content h2 { font-size: 28px; margin: 40px 0 16px; }
.article-content h3 { font-size: 22px; margin: 32px 0 12px; }
.article-content p { margin-bottom: 20px; }
.article-content ul, .article-content ol { margin-bottom: 20px; }
.article-content img {
    width: 100%;
    border-radius: var(--rounded-lg);
    border: 1px solid var(--hairline);
    margin: 24px 0;
}
.article-content figcaption {
    font-size: 13px;
    color: var(--muted);
    margin-top: 8px;
    margin-bottom: 24px;
}
.article-content .data-block {
    background: var(--surface-card);
    border: 1px solid var(--hairline);
    border-radius: var(--rounded-lg);
    padding: 24px;
    margin: 32px 0;
}
.article-content .data-block h4 { margin-bottom: 12px; }
.article-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 24px 0;
    font-size: 14px;
}
.article-content table th {
    background: var(--surface-strong);
    color: var(--ink);
    font-weight: 600;
    padding: 10px 12px;
    text-align: left;
    border: 1px solid var(--hairline);
}
.article-content table td {
    padding: 10px 12px;
    border: 1px solid var(--hairline);
    color: var(--body);
}
.article-content table tr:nth-child(even) td { background: var(--canvas-soft); }

.article-sidebar { position: sticky; top: 80px; }
.sidebar-card {
    background: var(--surface-card);
    border: 1px solid var(--hairline);
    border-radius: var(--rounded-lg);
    padding: 20px;
    margin-bottom: 20px;
}
.sidebar-card h4 { margin-bottom: 12px; font-size: 14px; }
.sidebar-card ul { list-style: none; padding: 0; }
.sidebar-card ul li { margin-bottom: 8px; }
.sidebar-card ul li a { font-size: 14px; color: var(--body); }
.sidebar-card ul li a:hover { color: var(--primary); }

.toc-list { list-style: none; padding: 0; counter-reset: toc-counter; }
.toc-list li { counter-increment: toc-counter; position: relative; padding-left: 24px; margin-bottom: 8px; }
.toc-list li::before {
    content: counter(toc-counter);
    position: absolute;
    left: 0;
    top: 2px;
    font-size: 11px;
    font-weight: 600;
    color: var(--muted);
}
.toc-list li a { font-size: 14px; color: var(--body); }
.toc-list li a:hover { color: var(--primary); }

.info-band {
    background: var(--surface-card);
    border-top: 1px solid var(--hairline);
    border-bottom: 1px solid var(--hairline);
    padding: 48px 0;
}
.info-band-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
}
.info-item h3 { font-size: 36px; letter-spacing: -0.72px; color: var(--primary); margin-bottom: 4px; }
.info-item p { font-size: 14px; color: var(--muted); margin: 0; }

.contact-section { padding: 80px 0; }
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: start;
}
.contact-info h3 { font-size: 26px; margin-bottom: 16px; }
.contact-info p { margin-bottom: 16px; }

.form-group { margin-bottom: 20px; }
.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--ink);
    margin-bottom: 6px;
}
.form-group input,
.form-group textarea {
    width: 100%;
    background: var(--surface-card);
    color: var(--ink);
    font-size: 16px;
    font-family: inherit;
    border: 1px solid var(--hairline-strong);
    border-radius: var(--rounded-md);
    padding: 12px 16px;
    height: 44px;
    transition: border-color 0.15s;
    outline: none;
}
.form-group textarea {
    height: auto;
    min-height: 120px;
    resize: vertical;
}
.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--primary);
}
.form-group input.error,
.form-group textarea.error {
    border-color: var(--semantic-error);
}
.form-error {
    font-size: 13px;
    color: var(--semantic-error);
    margin-top: 4px;
    display: none;
}
.form-error.visible { display: block; }

#formSuccess {
    display: none;
    background: var(--semantic-success);
    color: #fff;
    border-radius: var(--rounded-md);
    padding: 16px 20px;
    font-size: 15px;
    margin-top: 16px;
}
#formSuccess.visible { display: block; }

.btn-loading {
    opacity: 0.75;
    pointer-events: none;
    cursor: not-allowed;
}

.page-header {
    padding: 60px 0;
    border-bottom: 1px solid var(--hairline);
}
.page-header h1 { font-size: 40px; margin-bottom: 12px; }
.page-header p { max-width: 560px; }

.page-body {
    padding: 60px 0 80px;
    max-width: 740px;
}
.page-body h2 { font-size: 24px; margin: 40px 0 12px; }
.page-body h3 { font-size: 20px; margin: 28px 0 10px; }
.page-body p { margin-bottom: 16px; }
.page-body ul { margin-bottom: 16px; }

.cookie-banner {
    display: none;
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--ink);
    color: var(--canvas);
    border-radius: var(--rounded-lg);
    padding: 20px 24px;
    max-width: 600px;
    width: calc(100% - 48px);
    z-index: 200;
    box-shadow: 0 4px 24px rgba(38,37,30,0.18);
}
.cookie-banner.visible { display: block; }
.cookie-inner { display: flex; align-items: center; gap: 20px; flex-wrap: wrap; }
.cookie-inner p { color: var(--canvas); font-size: 14px; margin: 0; flex: 1; min-width: 200px; }
.cookie-inner p a { color: var(--primary); }
.cookie-inner p a:hover { color: var(--primary-active); }
.cookie-actions { display: flex; gap: 8px; flex-shrink: 0; }

.site-footer {
    background: var(--canvas);
    border-top: 1px solid var(--hairline);
    padding: 64px 0 0;
}
.footer-inner {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
    gap: 32px;
    padding-bottom: 48px;
}
.footer-brand {
    display: block;
    font-size: 18px;
    font-weight: 600;
    color: var(--ink);
    margin-bottom: 12px;
    letter-spacing: -0.3px;
}
.footer-col p { font-size: 14px; color: var(--body); line-height: 1.6; margin: 0; }
.footer-col h4 { font-size: 13px; font-weight: 600; color: var(--ink); margin-bottom: 12px; letter-spacing: 0; }
.footer-col ul { list-style: none; padding: 0; }
.footer-col ul li { margin-bottom: 8px; }
.footer-col ul li a { font-size: 14px; color: var(--body); }
.footer-col ul li a:hover { color: var(--primary); }
.footer-col address p { font-size: 14px; color: var(--body); }
.footer-col address p a { color: var(--body); }
.footer-col address p a:hover { color: var(--primary); }
.footer-bottom {
    border-top: 1px solid var(--hairline);
    padding: 20px 0;
}
.footer-bottom p { font-size: 13px; color: var(--muted); margin: 0 0 4px; }
.footer-bottom .footer-disclaimer { font-size: 12px; color: var(--muted-soft); }

@media (max-width: 1024px) {
    h1 { font-size: 40px; }
    .cards-grid { grid-template-columns: repeat(2, 1fr); }
    .info-band-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-inner { grid-template-columns: repeat(3, 1fr); }
    .article-body { grid-template-columns: 1fr; }
    .article-sidebar { position: static; }
}

@media (max-width: 768px) {
    h1 { font-size: 32px; letter-spacing: -0.8px; }
    h2 { font-size: 26px; }
    h3 { font-size: 22px; }
    .section { padding: 48px 0; }
    .hero-band { padding: 48px 0; }
    .hero-image-wrap { max-height: 280px; }
    .hero-image-wrap img { height: 280px; }
    .cards-grid { grid-template-columns: 1fr; }
    .cards-grid-2 { grid-template-columns: 1fr; }
    .contact-grid { grid-template-columns: 1fr; }
    .info-band-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; }
    .footer-inner { grid-template-columns: repeat(2, 1fr); }
    .nav-toggle { display: flex; }
    .site-nav {
        display: none;
        position: absolute;
        top: 64px;
        left: 0;
        right: 0;
        background: var(--canvas);
        border-bottom: 1px solid var(--hairline);
        padding: 16px 24px;
    }
    .site-nav.open { display: block; }
    .site-nav ul { flex-direction: column; gap: 4px; align-items: flex-start; }
    .site-nav ul li a { padding: 10px 12px; display: block; width: 100%; }
}

@media (max-width: 480px) {
    .container { padding: 0 16px; }
    h1 { font-size: 28px; }
    .footer-inner { grid-template-columns: 1fr; }
    .info-band-grid { grid-template-columns: 1fr; }
}