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

: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;
    --radius-xs: 4px;
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-pill: 9999px;
}

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

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

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

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

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

.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: -0.01em;
    text-decoration: none;
}

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

.site-nav ul {
    display: flex;
    gap: 32px;
    list-style: none;
}

.site-nav a {
    font-size: 14px;
    font-weight: 500;
    line-height: 1.4;
    color: var(--body);
    text-decoration: none;
    transition: color 0.15s;
}

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

.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;
}

.hero-band {
    padding: 80px 0;
    background: var(--canvas);
}

.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(--radius-pill);
    padding: 4px 10px;
    margin-bottom: 20px;
}

.hero-title {
    font-size: 56px;
    font-weight: 400;
    line-height: 1.1;
    letter-spacing: -1.5px;
    color: var(--ink);
    max-width: 760px;
    margin-bottom: 20px;
}

.hero-sub {
    font-size: 18px;
    line-height: 1.5;
    color: var(--body);
    max-width: 560px;
    margin-bottom: 32px;
}

.hero-image {
    width: 100%;
    max-height: 480px;
    object-fit: cover;
    border-radius: var(--radius-lg);
    border: 1px solid var(--hairline);
    margin-top: 40px;
}

.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;
}

.section-title {
    font-size: 36px;
    font-weight: 400;
    line-height: 1.2;
    letter-spacing: -0.72px;
    color: var(--ink);
    margin-bottom: 16px;
}

.section-sub {
    font-size: 16px;
    line-height: 1.5;
    color: var(--body);
    max-width: 600px;
    margin-bottom: 40px;
}

.section-divider {
    border: none;
    border-top: 1px solid var(--hairline);
    margin: 0;
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.card-grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

.feature-card {
    background: var(--surface-card);
    border: 1px solid var(--hairline);
    border-radius: var(--radius-lg);
    padding: 24px;
}

.feature-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: var(--radius-md);
    margin-bottom: 16px;
}

.feature-card .card-label {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.88px;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 8px;
}

.feature-card h3 {
    font-size: 18px;
    font-weight: 600;
    line-height: 1.4;
    color: var(--ink);
    margin-bottom: 8px;
}

.feature-card p {
    font-size: 14px;
    line-height: 1.5;
    color: var(--body);
}

.feature-card .card-link {
    display: inline-block;
    margin-top: 16px;
    font-size: 14px;
    font-weight: 500;
    color: var(--ink);
    border-bottom: 1px solid var(--hairline-strong);
    padding-bottom: 1px;
}

.feature-card .card-link:hover {
    color: var(--primary);
    border-bottom-color: var(--primary);
}

.article-hero {
    padding: 64px 0 40px;
    border-bottom: 1px solid var(--hairline);
}

.article-meta {
    font-size: 13px;
    color: var(--muted);
    margin-bottom: 16px;
}

.article-title {
    font-size: 42px;
    font-weight: 400;
    line-height: 1.15;
    letter-spacing: -0.8px;
    color: var(--ink);
    max-width: 800px;
    margin-bottom: 16px;
}

.article-intro {
    font-size: 18px;
    line-height: 1.6;
    color: var(--body);
    max-width: 680px;
    margin-bottom: 24px;
}

.article-image {
    width: 100%;
    max-height: 440px;
    object-fit: cover;
    border-radius: var(--radius-lg);
    border: 1px solid var(--hairline);
    margin-top: 32px;
}

.article-body {
    padding: 48px 0 80px;
}

.article-content {
    max-width: 720px;
}

.article-content h2 {
    font-size: 26px;
    font-weight: 400;
    line-height: 1.25;
    letter-spacing: -0.325px;
    color: var(--ink);
    margin: 40px 0 12px;
}

.article-content h3 {
    font-size: 20px;
    font-weight: 600;
    line-height: 1.3;
    color: var(--ink);
    margin: 28px 0 8px;
}

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

.article-content ul,
.article-content ol {
    margin: 12px 0 20px 24px;
    color: var(--body);
    font-size: 16px;
    line-height: 1.7;
}

.article-content li { margin-bottom: 6px; }

.article-content a {
    color: var(--ink);
    border-bottom: 1px solid var(--hairline-strong);
}

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

.article-content code {
    font-family: 'JetBrains Mono', monospace;
    font-size: 13px;
    background: var(--surface-card);
    border: 1px solid var(--hairline);
    border-radius: var(--radius-xs);
    padding: 2px 6px;
    color: var(--ink);
}

.info-box {
    background: var(--surface-card);
    border: 1px solid var(--hairline);
    border-radius: var(--radius-lg);
    padding: 20px 24px;
    margin: 24px 0;
}

.info-box .info-label {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.88px;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 8px;
}

.info-box p { margin-bottom: 0; }

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

.toc {
    background: var(--surface-card);
    border: 1px solid var(--hairline);
    border-radius: var(--radius-lg);
    padding: 20px 24px;
}

.toc-title {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.88px;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 12px;
}

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

.toc ul li { margin-bottom: 8px; }

.toc a {
    font-size: 14px;
    color: var(--body);
    line-height: 1.4;
}

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

.article-with-sidebar {
    display: grid;
    grid-template-columns: 1fr 260px;
    gap: 48px;
    align-items: start;
}

.related-section {
    padding: 48px 0 80px;
    border-top: 1px solid var(--hairline);
}

.related-section .section-title {
    font-size: 26px;
    margin-bottom: 24px;
}

.btn-primary {
    display: inline-block;
    background: var(--primary);
    color: var(--on-primary);
    font-size: 14px;
    font-weight: 500;
    line-height: 1;
    padding: 10px 18px;
    height: 40px;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    text-decoration: none;
    transition: background 0.15s;
}

.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;
    line-height: 1;
    padding: 10px 18px;
    height: 40px;
    border-radius: var(--radius-md);
    border: 1px solid var(--hairline-strong);
    cursor: pointer;
    text-decoration: none;
    transition: border-color 0.15s;
}

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

.btn-sm { height: 34px; padding: 8px 14px; font-size: 13px; }

.form-section {
    padding: 80px 0;
    background: var(--canvas);
    border-top: 1px solid var(--hairline);
}

.contact-form {
    max-width: 560px;
}

.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(--radius-md);
    padding: 12px 16px;
    height: 44px;
    outline: none;
    transition: border-color 0.15s;
}

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

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

.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-status {
    font-size: 14px;
    margin-top: 16px;
    display: none;
}

.form-status.success { color: var(--semantic-success); }
.form-status.loading { color: var(--muted); }

.page-hero {
    padding: 64px 0 48px;
    border-bottom: 1px solid var(--hairline);
}

.page-title {
    font-size: 42px;
    font-weight: 400;
    line-height: 1.15;
    letter-spacing: -0.8px;
    color: var(--ink);
    margin-bottom: 12px;
}

.page-meta {
    font-size: 13px;
    color: var(--muted);
}

.page-content {
    padding: 48px 0 80px;
    max-width: 720px;
}

.page-content h2 {
    font-size: 22px;
    font-weight: 400;
    line-height: 1.3;
    letter-spacing: -0.11px;
    color: var(--ink);
    margin: 36px 0 10px;
}

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

.page-content ul {
    margin: 12px 0 20px 24px;
    color: var(--body);
    font-size: 16px;
    line-height: 1.7;
}

.page-content li { margin-bottom: 6px; }

.page-content a { color: var(--ink); border-bottom: 1px solid var(--hairline-strong); }
.page-content a:hover { color: var(--primary); border-bottom-color: var(--primary); }

.disclaimer-box {
    background: var(--surface-card);
    border: 1px solid var(--hairline);
    border-left: 3px solid var(--muted);
    border-radius: var(--radius-md);
    padding: 16px 20px;
    margin: 24px 0;
    font-size: 14px;
    color: var(--muted);
    line-height: 1.6;
}

.site-footer {
    background: var(--canvas);
    border-top: 1px solid var(--hairline);
    padding: 64px 0 48px;
}

.footer-inner {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
}

.footer-brand {
    font-size: 16px;
    font-weight: 600;
    color: var(--ink);
    display: block;
    margin-bottom: 8px;
}

.footer-tagline {
    font-size: 14px;
    color: var(--body);
    line-height: 1.5;
}

.footer-heading {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.88px;
    text-transform: uppercase;
    color: var(--muted);
    display: block;
    margin-bottom: 12px;
}

.footer-col ul {
    list-style: none;
    padding: 0;
}

.footer-col ul li {
    font-size: 14px;
    color: var(--body);
    line-height: 1.4;
    margin-bottom: 8px;
}

.footer-col ul li a {
    color: var(--body);
    text-decoration: none;
}

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

.footer-bottom {
    border-top: 1px solid var(--hairline);
    margin-top: 48px;
    padding-top: 24px;
}

.footer-bottom .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
    font-size: 14px;
    color: var(--muted);
}

.footer-bottom a {
    color: var(--muted);
    text-decoration: none;
}

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

.footer-updated { color: var(--muted-soft); }

.cookie-banner {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 1000;
    max-width: 620px;
    width: calc(100% - 48px);
    background: var(--surface-card);
    border: 1px solid var(--hairline-strong);
    border-radius: var(--radius-lg);
    box-shadow: 0 2px 16px rgba(38,37,30,0.08);
    display: none;
}

.cookie-banner.visible { display: block; }

.cookie-inner {
    padding: 20px 24px;
    display: flex;
    align-items: center;
    gap: 20px;
    flex-wrap: wrap;
}

.cookie-inner p {
    font-size: 14px;
    color: var(--body);
    line-height: 1.5;
    flex: 1;
    margin: 0;
}

.cookie-inner p a { color: var(--ink); border-bottom: 1px solid var(--hairline-strong); }

.cookie-actions {
    display: flex;
    gap: 8px;
    flex-shrink: 0;
}

.breadcrumb {
    font-size: 13px;
    color: var(--muted);
    margin-bottom: 16px;
}

.breadcrumb a { color: var(--muted); text-decoration: none; }
.breadcrumb a:hover { color: var(--ink); }
.breadcrumb span { margin: 0 6px; }

@media (max-width: 1024px) {
    .hero-title { font-size: 42px; }
    .card-grid { grid-template-columns: repeat(2, 1fr); }
    .article-with-sidebar { grid-template-columns: 1fr; }
    .article-sidebar { position: static; }
    .footer-inner { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
    .hero-title { font-size: 32px; letter-spacing: -0.8px; }
    .hero-sub { font-size: 16px; }
    .section-title { font-size: 28px; }
    .article-title { font-size: 30px; }
    .page-title { font-size: 30px; }
    .card-grid, .card-grid-2 { grid-template-columns: 1fr; }
    .footer-inner { grid-template-columns: 1fr 1fr; gap: 24px; }

    .site-nav {
        display: none;
        position: absolute;
        top: 64px;
        left: 0;
        right: 0;
        background: var(--canvas);
        border-bottom: 1px solid var(--hairline);
        padding: 16px 24px 24px;
    }

    .site-nav.open { display: block; }

    .site-nav ul {
        flex-direction: column;
        gap: 0;
    }

    .site-nav a {
        display: block;
        padding: 10px 0;
        border-bottom: 1px solid var(--hairline-soft);
    }

    .nav-toggle { display: flex; }

    .header-inner { position: relative; }
}

@media (max-width: 480px) {
    .footer-inner { grid-template-columns: 1fr; }
    .hero-band { padding: 48px 0; }
    .section { padding: 48px 0; }
    .hero-title { font-size: 28px; }
    .cookie-inner { flex-direction: column; align-items: flex-start; }
}