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

:root {
    --color-primary: #181d26;
    --color-primary-active: #0d1218;
    --color-canvas: #ffffff;
    --color-surface-soft: #f8fafc;
    --color-surface-strong: #e0e2e6;
    --color-surface-dark: #181d26;
    --color-surface-dark-elevated: #1d1f25;
    --color-hairline: #dddddd;
    --color-ink: #181d26;
    --color-body: #333840;
    --color-muted: #41454d;
    --color-on-primary: #ffffff;
    --color-link: #1b61c9;
    --color-link-active: #1a3866;
    --color-sig-coral: #aa2d00;
    --color-sig-forest: #0a2e0e;
    --color-sig-cream: #f5e9d4;
    --color-sig-peach: #fcab79;
    --color-sig-mint: #a8d8c4;
    --color-sig-yellow: #f4d35e;
    --color-sig-mustard: #d9a441;
    --color-info-border: #458fff;
    --rounded-xs: 2px;
    --rounded-sm: 6px;
    --rounded-md: 10px;
    --rounded-lg: 12px;
    --rounded-full: 9999px;
    --sp-xxs: 4px;
    --sp-xs: 8px;
    --sp-sm: 12px;
    --sp-md: 16px;
    --sp-lg: 24px;
    --sp-xl: 32px;
    --sp-xxl: 48px;
    --sp-section: 96px;
    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    --max-width: 1280px;
}

html { font-size: 16px; scroll-behavior: smooth; }
body { font-family: var(--font-main); color: var(--color-body); background: var(--color-canvas); font-size: 14px; line-height: 1.25; -webkit-font-smoothing: antialiased; }

a { color: var(--color-link); text-decoration: none; }
a:active { color: var(--color-link-active); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }

.container { max-width: var(--max-width); margin: 0 auto; padding: 0 var(--sp-xxl); }

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&display=swap');

.top-nav {
    position: sticky; top: 0; z-index: 100;
    background: var(--color-canvas);
    border-bottom: 1px solid var(--color-hairline);
    height: 64px;
}
.nav-inner {
    max-width: var(--max-width); margin: 0 auto; padding: 0 var(--sp-xxl);
    height: 100%; display: flex; align-items: center; gap: var(--sp-xxl);
}
.nav-logo { display: flex; align-items: center; text-decoration: none; }
.logo-text { font-size: 18px; font-weight: 600; color: var(--color-ink); letter-spacing: -0.3px; }
.nav-menu { display: flex; gap: var(--sp-xl); align-items: center; margin-left: auto; }
.nav-menu a { font-size: 14px; font-weight: 400; color: var(--color-body); text-decoration: none; transition: color 0.15s; }
.nav-menu a.active { color: var(--color-ink); font-weight: 500; }
.nav-hamburger { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: var(--sp-xs); margin-left: auto; }
.nav-hamburger span { display: block; width: 22px; height: 2px; background: var(--color-ink); border-radius: 2px; transition: 0.2s; }

.btn-primary {
    display: inline-flex; align-items: center; justify-content: center;
    background: var(--color-primary); color: var(--color-on-primary);
    font-size: 16px; font-weight: 500; line-height: 1.4;
    padding: 16px 24px; border-radius: var(--rounded-lg);
    border: none; cursor: pointer; text-decoration: none;
    box-shadow: 0 1px 3px rgba(24,29,38,0.12);
    transition: background 0.15s;
}
.btn-primary:active { background: var(--color-primary-active); }
.btn-secondary {
    display: inline-flex; align-items: center; justify-content: center;
    background: var(--color-canvas); color: var(--color-ink);
    font-size: 16px; font-weight: 500; line-height: 1.4;
    padding: 16px 24px; border-radius: var(--rounded-lg);
    border: 1px solid var(--color-hairline); cursor: pointer; text-decoration: none;
    transition: border-color 0.15s;
}
.btn-secondary:active { border-color: var(--color-primary); }

.hero-band {
    padding: var(--sp-section) 0;
    background: var(--color-canvas);
}
.hero-band .container { display: flex; flex-direction: column; gap: var(--sp-lg); max-width: 720px; }
.hero-band h1 { font-size: 40px; font-weight: 400; line-height: 1.2; color: var(--color-ink); }
.hero-band .hero-sub { font-size: 18px; font-weight: 400; line-height: 1.5; color: var(--color-body); max-width: 560px; }
.hero-band .hero-actions { display: flex; gap: var(--sp-md); flex-wrap: wrap; }
.hero-meta { font-size: 13px; color: var(--color-muted); margin-top: var(--sp-sm); }

.section-band { padding: var(--sp-section) 0; background: var(--color-canvas); }
.section-band.bg-soft { background: var(--color-surface-soft); }
.section-band.bg-cream { background: var(--color-sig-cream); }
.section-band.bg-dark { background: var(--color-surface-dark); }

.section-title { font-size: 32px; font-weight: 400; line-height: 1.2; color: var(--color-ink); margin-bottom: var(--sp-lg); }
.section-title-on-dark { color: var(--color-on-primary); }
.section-sub { font-size: 16px; color: var(--color-body); line-height: 1.5; margin-bottom: var(--sp-xxl); }
.section-sub-on-dark { color: rgba(255,255,255,0.75); }

.card-grid { display: grid; gap: var(--sp-lg); }
.card-grid-3 { grid-template-columns: repeat(3, 1fr); }
.card-grid-2 { grid-template-columns: repeat(2, 1fr); }

.article-card {
    background: var(--color-canvas); border-radius: var(--rounded-md);
    border: 1px solid var(--color-hairline); overflow: hidden;
    text-decoration: none; display: flex; flex-direction: column;
    transition: box-shadow 0.15s;
}
.article-card:active { box-shadow: 0 4px 16px rgba(24,29,38,0.1); }
.article-card__img { width: 100%; aspect-ratio: 16/9; object-fit: cover; }
.article-card__body { padding: var(--sp-md); display: flex; flex-direction: column; gap: var(--sp-xs); flex: 1; }
.article-card__tag { font-size: 11px; font-weight: 500; letter-spacing: 0.8px; text-transform: uppercase; color: var(--color-muted); }
.article-card__title { font-size: 18px; font-weight: 500; line-height: 1.4; color: var(--color-ink); }
.article-card__excerpt { font-size: 14px; color: var(--color-body); line-height: 1.5; flex: 1; }
.article-card__meta { font-size: 13px; color: var(--color-muted); margin-top: var(--sp-xs); }

.sig-coral-card {
    background: var(--color-sig-coral); border-radius: var(--rounded-lg);
    padding: var(--sp-xxl); color: var(--color-on-primary);
}
.sig-coral-card h2 { font-size: 32px; font-weight: 400; line-height: 1.2; margin-bottom: var(--sp-md); }
.sig-coral-card p { font-size: 14px; line-height: 1.5; opacity: 0.88; margin-bottom: var(--sp-xl); max-width: 520px; }

.sig-dark-card {
    background: var(--color-surface-dark); border-radius: var(--rounded-lg);
    padding: var(--sp-xxl); color: var(--color-on-primary);
}
.sig-dark-card h2 { font-size: 32px; font-weight: 400; line-height: 1.2; margin-bottom: var(--sp-md); }
.sig-dark-card p { font-size: 14px; line-height: 1.5; opacity: 0.8; margin-bottom: var(--sp-xl); max-width: 520px; }

.demo-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--sp-lg); }
.demo-card {
    border-radius: var(--rounded-md); padding: var(--sp-md); overflow: hidden;
}
.demo-card--peach { background: var(--color-sig-peach); }
.demo-card--mint { background: var(--color-sig-mint); }
.demo-card--yellow { background: var(--color-sig-yellow); }
.demo-card__img { border-radius: var(--rounded-sm); width: 100%; aspect-ratio: 4/3; object-fit: cover; margin-bottom: var(--sp-sm); }
.demo-card__label { font-size: 16px; font-weight: 500; line-height: 1.4; color: var(--color-ink); }
.demo-card__text { font-size: 14px; color: var(--color-body); margin-top: var(--sp-xxs); }

.cta-band-light {
    background: var(--color-surface-strong); border-radius: var(--rounded-lg);
    padding: var(--sp-xxl); display: flex; align-items: center; justify-content: space-between; gap: var(--sp-lg); flex-wrap: wrap;
}
.cta-band-light h2 { font-size: 32px; font-weight: 400; line-height: 1.2; color: var(--color-ink); max-width: 480px; }

.contact-form { max-width: 560px; display: flex; flex-direction: column; gap: var(--sp-md); }
.form-group { display: flex; flex-direction: column; gap: var(--sp-xs); }
.form-group label { font-size: 14px; font-weight: 500; color: var(--color-ink); }
.form-group input, .form-group textarea {
    background: var(--color-canvas); color: var(--color-ink);
    font-size: 14px; font-family: var(--font-main);
    border: 1px solid var(--color-hairline); border-radius: var(--rounded-sm);
    padding: 12px 16px; height: 44px; outline: none;
    transition: border-color 0.15s;
}
.form-group input:focus, .form-group textarea:focus { border-color: var(--color-info-border); }
.form-group textarea { height: auto; min-height: 100px; resize: vertical; }

.article-hero { padding: var(--sp-section) 0 var(--sp-xxl); background: var(--color-canvas); }
.article-hero .container { max-width: 800px; }
.article-hero .tag { font-size: 11px; font-weight: 500; letter-spacing: 0.8px; text-transform: uppercase; color: var(--color-muted); margin-bottom: var(--sp-sm); }
.article-hero h1 { font-size: 40px; font-weight: 400; line-height: 1.2; color: var(--color-ink); margin-bottom: var(--sp-md); }
.article-hero .lead { font-size: 18px; color: var(--color-body); line-height: 1.5; margin-bottom: var(--sp-lg); }
.article-hero .article-meta { font-size: 13px; color: var(--color-muted); }
.article-hero .hero-img { margin-top: var(--sp-xxl); border-radius: var(--rounded-md); width: 100%; aspect-ratio: 16/9; object-fit: cover; }

.article-body { padding: var(--sp-xxl) 0 var(--sp-section); }
.article-body .container { max-width: 800px; display: grid; grid-template-columns: 1fr 240px; gap: var(--sp-xxl); align-items: start; }
.article-content h2 { font-size: 24px; font-weight: 400; line-height: 1.35; color: var(--color-ink); margin: var(--sp-xxl) 0 var(--sp-md); }
.article-content h3 { font-size: 18px; font-weight: 500; line-height: 1.4; color: var(--color-ink); margin: var(--sp-xl) 0 var(--sp-sm); }
.article-content p { font-size: 15px; color: var(--color-body); line-height: 1.7; margin-bottom: var(--sp-md); }
.article-content ul, .article-content ol { margin: var(--sp-md) 0 var(--sp-md) var(--sp-lg); }
.article-content ul { list-style: disc; }
.article-content ol { list-style: decimal; }
.article-content li { font-size: 15px; color: var(--color-body); line-height: 1.7; margin-bottom: var(--sp-xs); }
.article-content a { color: var(--color-link); }
.article-content figure { margin: var(--sp-xl) 0; }
.article-content figure img { border-radius: var(--rounded-md); width: 100%; }
.article-content figcaption { font-size: 13px; color: var(--color-muted); margin-top: var(--sp-xs); }
.article-content blockquote { border-left: 3px solid var(--color-sig-coral); padding-left: var(--sp-md); margin: var(--sp-xl) 0; }
.article-content blockquote p { font-size: 17px; font-style: italic; color: var(--color-ink); }

.article-sidebar { position: sticky; top: 80px; }
.sidebar-box { background: var(--color-surface-soft); border-radius: var(--rounded-md); padding: var(--sp-xl); margin-bottom: var(--sp-lg); }
.sidebar-box h3 { font-size: 16px; font-weight: 500; color: var(--color-ink); margin-bottom: var(--sp-md); }
.sidebar-box ul { list-style: none; }
.sidebar-box ul li { margin-bottom: var(--sp-sm); }
.sidebar-box ul li a { font-size: 14px; color: var(--color-link); line-height: 1.4; }

.page-hero { padding: var(--sp-section) 0 var(--sp-xxl); background: var(--color-canvas); }
.page-hero h1 { font-size: 40px; font-weight: 400; line-height: 1.2; color: var(--color-ink); margin-bottom: var(--sp-md); }
.page-hero .lead { font-size: 18px; color: var(--color-body); line-height: 1.5; max-width: 600px; }
.page-content { padding: var(--sp-xxl) 0 var(--sp-section); }
.page-content .container { max-width: 800px; }
.page-content h2 { font-size: 24px; font-weight: 400; line-height: 1.35; color: var(--color-ink); margin: var(--sp-xxl) 0 var(--sp-md); }
.page-content h3 { font-size: 18px; font-weight: 500; color: var(--color-ink); margin: var(--sp-xl) 0 var(--sp-sm); }
.page-content p { font-size: 15px; color: var(--color-body); line-height: 1.7; margin-bottom: var(--sp-md); }
.page-content ul { list-style: disc; margin: var(--sp-md) 0 var(--sp-md) var(--sp-lg); }
.page-content li { font-size: 15px; color: var(--color-body); line-height: 1.7; margin-bottom: var(--sp-xs); }
.page-content a { color: var(--color-link); }

.cookie-banner {
    position: fixed; bottom: 0; left: 0; right: 0; z-index: 999;
    background: var(--color-surface-dark); color: var(--color-on-primary);
    padding: var(--sp-lg) var(--sp-xxl);
    display: flex; align-items: center; gap: var(--sp-lg); flex-wrap: wrap;
    border-top: 1px solid rgba(255,255,255,0.1);
}
.cookie-banner p { font-size: 14px; flex: 1; min-width: 200px; opacity: 0.9; }
.cookie-banner p a { color: #9ecfff; }
.cookie-banner__actions { display: flex; gap: var(--sp-sm); flex-shrink: 0; }
.btn-legal {
    background: var(--color-link); color: var(--color-on-primary);
    font-size: 13.12px; font-weight: 600; line-height: 1.2;
    padding: 12px 10px; border-radius: var(--rounded-xs);
    border: none; cursor: pointer; text-decoration: none; white-space: nowrap;
}
.btn-legal-outline {
    background: transparent; color: var(--color-on-primary);
    font-size: 13.12px; font-weight: 600; line-height: 1.2;
    padding: 12px 10px; border-radius: var(--rounded-xs);
    border: 1px solid rgba(255,255,255,0.3); cursor: pointer; white-space: nowrap;
}

.site-footer { background: var(--color-canvas); border-top: 1px solid var(--color-hairline); padding: var(--sp-section) 0 var(--sp-xl); }
.footer-inner { max-width: var(--max-width); margin: 0 auto; padding: 0 var(--sp-xxl); display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: var(--sp-xl) var(--sp-md); margin-bottom: var(--sp-xl); }
.footer-brand { font-size: 16px; font-weight: 600; color: var(--color-ink); margin-bottom: var(--sp-sm); }
.footer-tagline { font-size: 14px; color: var(--color-muted); line-height: 1.6; margin-bottom: var(--sp-md); }
.footer-contact { font-size: 14px; color: var(--color-muted); line-height: 1.8; }
.footer-contact a { color: var(--color-muted); }
.footer-legal-note { font-size: 12px; color: var(--color-muted); margin-top: var(--sp-sm); }
.footer-col-title { font-size: 14px; font-weight: 500; color: var(--color-ink); margin-bottom: var(--sp-md); }
.footer-col ul li { margin-bottom: var(--sp-sm); }
.footer-col ul li a { font-size: 14px; color: var(--color-muted); }
.footer-bottom { max-width: var(--max-width); margin: 0 auto; padding: var(--sp-lg) var(--sp-xxl) 0; border-top: 1px solid var(--color-hairline); }
.footer-bottom p { font-size: 13px; color: var(--color-muted); line-height: 1.6; }
.footer-disclaimer { margin-top: var(--sp-xs); font-size: 12px; }

.breadcrumb { padding: var(--sp-md) 0; }
.breadcrumb ol { display: flex; gap: var(--sp-xs); list-style: none; }
.breadcrumb li { font-size: 14px; color: var(--color-muted); }
.breadcrumb li + li::before { content: '/'; margin-right: var(--sp-xs); }
.breadcrumb a { color: var(--color-muted); }

@media (max-width: 1024px) {
    .card-grid-3 { grid-template-columns: repeat(2, 1fr); }
    .demo-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-inner { grid-template-columns: 1fr 1fr; }
    .article-body .container { grid-template-columns: 1fr; }
    .article-sidebar { position: static; }
}

@media (max-width: 768px) {
    :root { --sp-section: 64px; --sp-xxl: 32px; }
    .container { padding: 0 var(--sp-md); }
    .nav-inner { padding: 0 var(--sp-md); }
    .nav-menu { display: none; position: fixed; top: 64px; left: 0; right: 0; bottom: 0; background: var(--color-canvas); flex-direction: column; gap: 0; padding: var(--sp-lg); z-index: 99; overflow-y: auto; }
    .nav-menu.open { display: flex; }
    .nav-menu a { font-size: 18px; padding: var(--sp-md) 0; border-bottom: 1px solid var(--color-hairline); }
    .nav-hamburger { display: flex; }
    .hero-band h1 { font-size: 28px; }
    .section-title { font-size: 24px; }
    .card-grid-3, .card-grid-2 { grid-template-columns: 1fr; }
    .demo-grid { grid-template-columns: 1fr; }
    .footer-inner { grid-template-columns: 1fr; }
    .cta-band-light { flex-direction: column; align-items: flex-start; }
    .cta-band-light h2 { font-size: 24px; }
    .sig-coral-card h2, .sig-dark-card h2 { font-size: 24px; }
    .article-hero h1, .page-hero h1 { font-size: 28px; }
    .cookie-banner { padding: var(--sp-md); }
}