: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;
    --radius-xs: 4px;
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-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;
    --font-sans: 'Inter', system-ui, 'Helvetica Neue', Helvetica, Arial, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
}

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

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

body {
    background-color: var(--canvas);
    color: var(--body);
    font-family: var(--font-sans);
    font-size: 16px;
    font-weight: 400;
    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; }

ul { list-style: none; }

.container {
    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;
}

.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: -0.02em;
}

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

.main-nav ul {
    display: flex;
    gap: var(--spacing-xl);
    align-items: center;
}

.main-nav a {
    font-size: 14px;
    font-weight: 500;
    color: var(--body);
    transition: color 0.15s;
    line-height: 1.4;
}

.main-nav a:hover,
.main-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: transform 0.2s, opacity 0.2s;
}

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

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

.btn-secondary {
    background: var(--surface-card);
    color: var(--ink);
    font-size: 14px;
    font-weight: 500;
    padding: 10px 18px;
    height: 40px;
    border-radius: var(--radius-md);
    border: 1px solid var(--hairline-strong);
    cursor: pointer;
    transition: border-color 0.15s;
    line-height: 1;
}

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

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

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

.hero-text h1 {
    font-size: 48px;
    font-weight: 400;
    line-height: 1.1;
    letter-spacing: -0.04em;
    color: var(--ink);
    margin-bottom: var(--spacing-lg);
}

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

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

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

.hero-image img {
    width: 100%;
    height: 380px;
    object-fit: cover;
}

.section {
    padding: var(--spacing-section) 0;
    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;
    letter-spacing: -0.02em;
    color: var(--ink);
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
}

.section-subtitle {
    font-size: 16px;
    color: var(--body);
    line-height: 1.6;
    max-width: 640px;
    margin-bottom: var(--spacing-xxl);
}

.articles-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.article-card {
    background: var(--surface-card);
    border: 1px solid var(--hairline);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: border-color 0.15s;
}

.article-card:hover { border-color: var(--hairline-strong); }

.article-card-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.article-card-body {
    padding: var(--spacing-lg);
}

.article-card-tag {
    display: inline-block;
    background: var(--surface-strong);
    color: var(--ink);
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.88px;
    text-transform: uppercase;
    padding: 4px 10px;
    border-radius: var(--radius-pill);
    margin-bottom: var(--spacing-sm);
}

.article-card-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--ink);
    line-height: 1.4;
    margin-bottom: var(--spacing-xs);
}

.article-card-excerpt {
    font-size: 14px;
    color: var(--body);
    line-height: 1.5;
    margin-bottom: var(--spacing-base);
}

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

.article-card a {
    display: block;
    text-decoration: none;
}

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

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

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

.feature-icon {
    font-size: 28px;
    margin-bottom: var(--spacing-base);
}

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

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

.intro-band {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xxl);
    align-items: center;
    padding: var(--spacing-section) 0;
    border-bottom: 1px solid var(--hairline-soft);
}

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

.intro-image img {
    width: 100%;
    height: 340px;
    object-fit: cover;
}

.intro-text h2 {
    font-size: 36px;
    font-weight: 400;
    letter-spacing: -0.02em;
    color: var(--ink);
    line-height: 1.2;
    margin-bottom: var(--spacing-base);
}

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

.contact-section {
    padding: var(--spacing-section) 0;
    border-bottom: 1px solid var(--hairline-soft);
}

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

.contact-info h2 {
    font-size: 36px;
    font-weight: 400;
    letter-spacing: -0.02em;
    color: var(--ink);
    margin-bottom: var(--spacing-base);
}

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

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

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

.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: var(--font-sans);
    font-size: 16px;
    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: 100px;
    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(--error); }

.form-msg {
    font-size: 14px;
    margin-top: var(--spacing-base);
    padding: 10px 16px;
    border-radius: var(--radius-md);
    display: none;
}

.form-msg.success {
    background: #d4f0e7;
    color: var(--success);
    display: block;
}

.form-msg.error {
    background: #fde8ed;
    color: var(--error);
    display: block;
}

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

.article-header {
    margin-bottom: var(--spacing-xxl);
}

.article-header .section-label { margin-bottom: var(--spacing-base); }

.article-header h1 {
    font-size: 48px;
    font-weight: 400;
    letter-spacing: -0.04em;
    color: var(--ink);
    line-height: 1.15;
    margin-bottom: var(--spacing-base);
}

.article-header .article-meta {
    font-size: 14px;
    color: var(--muted);
}

.article-featured-img {
    width: 100%;
    height: 460px;
    object-fit: cover;
    border-radius: var(--radius-lg);
    border: 1px solid var(--hairline);
    margin-bottom: var(--spacing-xxl);
}

.article-body {
    max-width: 760px;
}

.article-body h2 {
    font-size: 26px;
    font-weight: 400;
    letter-spacing: -0.01em;
    color: var(--ink);
    line-height: 1.25;
    margin: var(--spacing-xxl) 0 var(--spacing-base);
}

.article-body h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--ink);
    line-height: 1.3;
    margin: var(--spacing-xl) 0 var(--spacing-sm);
}

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

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

.article-body ul { list-style: disc; }
.article-body ol { list-style: decimal; }

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

.article-body a { color: var(--primary); }
.article-body a:hover { text-decoration: underline; }

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

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

.info-box p {
    font-size: 14px;
    color: var(--body);
    line-height: 1.6;
    margin: 0;
}

.article-nav {
    margin-top: var(--spacing-xxl);
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--hairline);
    display: flex;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
}

.article-nav a {
    font-size: 14px;
    font-weight: 500;
    color: var(--body);
    padding: 8px 16px;
    border: 1px solid var(--hairline-strong);
    border-radius: var(--radius-md);
    transition: border-color 0.15s, color 0.15s;
}

.article-nav a:hover { border-color: var(--ink); color: var(--ink); }

.page-content {
    padding: var(--spacing-section) 0;
    max-width: 800px;
}

.page-content h1 {
    font-size: 48px;
    font-weight: 400;
    letter-spacing: -0.04em;
    color: var(--ink);
    margin-bottom: var(--spacing-base);
}

.page-content h2 {
    font-size: 26px;
    font-weight: 400;
    letter-spacing: -0.01em;
    color: var(--ink);
    margin: var(--spacing-xxl) 0 var(--spacing-base);
}

.page-content h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--ink);
    margin: var(--spacing-xl) 0 var(--spacing-sm);
}

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

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

.page-content ul { list-style: disc; }
.page-content ol { list-style: decimal; }

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

.page-content a { color: var(--primary); }
.page-content a:hover { text-decoration: underline; }

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

.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: var(--spacing-xxl);
}

.footer-brand {
    font-size: 18px;
    font-weight: 600;
    color: var(--ink);
    letter-spacing: -0.02em;
    margin-bottom: var(--spacing-xs);
}

.footer-brand span { color: var(--primary); }

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

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

.footer-col ul li {
    margin-bottom: var(--spacing-xs);
}

.footer-col ul a {
    font-size: 14px;
    color: var(--body);
    transition: color 0.15s;
}

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

.footer-col ul li:not(:has(a)) {
    font-size: 14px;
    color: var(--body);
}

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

.footer-bottom p {
    font-size: 14px;
    color: var(--muted);
    line-height: 1.5;
    margin-bottom: var(--spacing-xxs);
}

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

.cookie-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--ink);
    color: var(--canvas);
    z-index: 200;
    border-top: 1px solid rgba(255,255,255,0.1);
}

.cookie-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-base) var(--spacing-xl);
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
    flex-wrap: wrap;
}

.cookie-inner p {
    font-size: 14px;
    color: #d4d2cc;
    line-height: 1.5;
    flex: 1;
    min-width: 200px;
}

.cookie-inner a { color: var(--canvas-soft); text-decoration: underline; }

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

.schema-article-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

@media (max-width: 1024px) {
    .hero-text h1 { font-size: 40px; }
    .articles-grid { grid-template-columns: repeat(2, 1fr); }
    .features-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-inner { grid-template-columns: repeat(2, 1fr); }
    .schema-article-list { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    .hero-inner { grid-template-columns: 1fr; }
    .intro-band { grid-template-columns: 1fr; }
    .contact-grid { grid-template-columns: 1fr; }
    .hero-text h1 { font-size: 32px; }
    .section-title { font-size: 28px; }
    .hero-image { display: none; }
    .main-nav { display: none; position: absolute; top: 64px; left: 0; right: 0; background: var(--canvas); border-bottom: 1px solid var(--hairline); padding: var(--spacing-base) var(--spacing-xl); }
    .main-nav.open { display: block; }
    .main-nav ul { flex-direction: column; gap: var(--spacing-base); }
    .nav-toggle { display: flex; }
    .articles-grid { grid-template-columns: 1fr; }
    .features-grid { grid-template-columns: 1fr; }
    .footer-inner { grid-template-columns: 1fr; }
    .article-header h1 { font-size: 32px; }
    .article-featured-img { height: 240px; }
    .page-content h1 { font-size: 32px; }
}