*, *::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;
    --hairline: #e6e5e0;
    --hairline-soft: #efeee8;
    --hairline-strong: #cfcdc4;
    --ink: #26251e;
    --body: #5a5852;
    --body-strong: #26251e;
    --muted: #807d72;
    --muted-soft: #a09c92;
    --on-primary: #ffffff;
    --success: #1f8a65;
    --error: #cf2d56;
    --r-xs: 4px;
    --r-sm: 6px;
    --r-md: 8px;
    --r-lg: 12px;
    --r-xl: 16px;
    --r-pill: 9999px;
}

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

a { color: var(--ink); text-decoration: underline; text-decoration-color: var(--hairline-strong); text-underline-offset: 3px; transition: color 0.15s, text-decoration-color 0.15s; }
a:hover { color: var(--primary); text-decoration-color: var(--primary); }

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

h1, h2, h3, h4 { color: var(--ink); font-weight: 400; line-height: 1.2; letter-spacing: -0.02em; }
h1 { font-size: clamp(32px, 5vw, 72px); letter-spacing: -0.03em; line-height: 1.1; }
h2 { font-size: clamp(24px, 3vw, 36px); letter-spacing: -0.02em; }
h3 { font-size: clamp(18px, 2.2vw, 26px); letter-spacing: -0.013px; }
h4 { font-size: 18px; font-weight: 600; }

p { margin-bottom: 1em; }
p:last-child { margin-bottom: 0; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.container--narrow { max-width: 800px; margin: 0 auto; padding: 0 24px; }

.section { padding: 80px 0; }
.section--soft { background: var(--canvas-soft); }
.section--white { background: var(--surface-card); }

.rh-nav { background: var(--canvas); border-bottom: 1px solid var(--hairline); position: sticky; top: 0; z-index: 100; height: 64px; display: flex; align-items: center; }
.rh-nav__inner { max-width: 1200px; margin: 0 auto; padding: 0 24px; display: flex; align-items: center; justify-content: space-between; width: 100%; gap: 32px; }
.rh-nav__logo { display: flex; align-items: center; gap: 8px; text-decoration: none; color: var(--ink); font-weight: 600; font-size: 15px; letter-spacing: -0.01em; flex-shrink: 0; }
.rh-nav__logo:hover { color: var(--ink); text-decoration: none; }
.rh-nav__menu { display: flex; list-style: none; gap: 4px; align-items: center; }
.rh-nav__link { display: inline-block; padding: 8px 12px; font-size: 14px; font-weight: 500; color: var(--body); text-decoration: none; border-radius: var(--r-sm); transition: color 0.15s, background 0.15s; }
.rh-nav__link:hover { color: var(--ink); background: var(--surface-strong); text-decoration: none; }
.rh-nav__item--active .rh-nav__link, .rh-nav__link[aria-current="page"] { color: var(--ink); }
.rh-nav__hamburger { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 8px; }
.rh-nav__hamburger span { display: block; width: 22px; height: 2px; background: var(--ink); border-radius: 2px; transition: transform 0.2s, opacity 0.2s; }

.btn { display: inline-flex; align-items: center; justify-content: center; gap: 6px; padding: 10px 18px; height: 40px; font-size: 14px; font-weight: 500; line-height: 1; border-radius: var(--r-md); border: none; cursor: pointer; text-decoration: none; transition: background 0.15s, color 0.15s, border-color 0.15s; white-space: nowrap; }
.btn--primary { background: var(--primary); color: var(--on-primary); }
.btn--primary:hover { background: var(--primary-active); color: var(--on-primary); text-decoration: none; }
.btn--secondary { background: var(--surface-card); color: var(--ink); border: 1px solid var(--hairline-strong); }
.btn--secondary:hover { background: var(--surface-strong); color: var(--ink); text-decoration: none; border-color: var(--muted); }
.btn--download { background: var(--ink); color: var(--canvas); padding: 12px 20px; height: 44px; }
.btn--download:hover { background: #3d3c32; color: var(--canvas); text-decoration: none; }

.hero { padding: 80px 0 80px; }
.hero__content { max-width: 680px; }
.hero__eyebrow { display: inline-flex; align-items: center; gap: 8px; 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(--r-pill); margin-bottom: 24px; }
.hero__title { margin-bottom: 24px; }
.hero__desc { font-size: 18px; color: var(--body); margin-bottom: 36px; max-width: 560px; line-height: 1.6; }
.hero__image { margin-top: 60px; border-radius: var(--r-lg); overflow: hidden; border: 1px solid var(--hairline); background: var(--surface-card); }
.hero__image img { width: 100%; height: 420px; object-fit: cover; }

.card { background: var(--surface-card); border: 1px solid var(--hairline); border-radius: var(--r-lg); padding: 24px; }
.card__icon { width: 40px; height: 40px; background: var(--surface-strong); border-radius: var(--r-md); display: flex; align-items: center; justify-content: center; margin-bottom: 16px; }
.card__title { font-size: 18px; font-weight: 600; color: var(--ink); margin-bottom: 8px; }
.card__text { font-size: 14px; color: var(--body); line-height: 1.6; }

.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }

.article-card { background: var(--surface-card); border: 1px solid var(--hairline); border-radius: var(--r-lg); overflow: hidden; transition: border-color 0.15s; }
.article-card:hover { border-color: var(--hairline-strong); }
.article-card__image { height: 200px; overflow: hidden; }
.article-card__image img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.3s; }
.article-card:hover .article-card__image img { transform: scale(1.03); }
.article-card__body { padding: 24px; }
.article-card__tag { display: inline-block; background: var(--surface-strong); color: var(--muted); font-size: 11px; font-weight: 600; letter-spacing: 0.88px; text-transform: uppercase; padding: 3px 8px; border-radius: var(--r-pill); margin-bottom: 12px; }
.article-card__title { font-size: 20px; font-weight: 400; color: var(--ink); margin-bottom: 10px; line-height: 1.3; letter-spacing: -0.01em; }
.article-card__title a { text-decoration: none; color: var(--ink); }
.article-card__title a:hover { color: var(--primary); }
.article-card__excerpt { font-size: 14px; color: var(--body); line-height: 1.6; margin-bottom: 16px; }
.article-card__meta { font-size: 13px; color: var(--muted); }

.section-label { font-size: 11px; font-weight: 600; letter-spacing: 0.88px; text-transform: uppercase; color: var(--muted); margin-bottom: 16px; display: block; }
.section-title { font-size: clamp(24px, 3vw, 36px); font-weight: 400; color: var(--ink); letter-spacing: -0.02em; margin-bottom: 48px; }

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

.article-header { padding: 60px 0 40px; border-bottom: 1px solid var(--hairline); }
.article-header__tag { display: inline-block; background: var(--surface-strong); color: var(--muted); font-size: 11px; font-weight: 600; letter-spacing: 0.88px; text-transform: uppercase; padding: 3px 8px; border-radius: var(--r-pill); margin-bottom: 16px; }
.article-header__title { font-size: clamp(28px, 4vw, 52px); font-weight: 400; letter-spacing: -0.02em; line-height: 1.15; margin-bottom: 20px; }
.article-header__desc { font-size: 18px; color: var(--body); line-height: 1.6; margin-bottom: 24px; max-width: 680px; }
.article-header__meta { font-size: 13px; color: var(--muted); display: flex; gap: 16px; flex-wrap: wrap; }

.article-body { padding: 48px 0 80px; }
.article-body h2 { font-size: clamp(20px, 2.5vw, 28px); margin-top: 48px; margin-bottom: 16px; }
.article-body h3 { font-size: clamp(17px, 2vw, 22px); margin-top: 32px; margin-bottom: 12px; }
.article-body p { color: var(--body); line-height: 1.7; margin-bottom: 16px; font-size: 16px; }
.article-body ul, .article-body ol { padding-left: 24px; margin-bottom: 16px; color: var(--body); line-height: 1.7; }
.article-body li { margin-bottom: 6px; }
.article-body img { border-radius: var(--r-lg); border: 1px solid var(--hairline); margin: 32px 0; width: 100%; }
.article-body figcaption { font-size: 13px; color: var(--muted); text-align: center; margin-top: -24px; margin-bottom: 32px; }
.article-body a { color: var(--ink); }

.info-box { background: var(--canvas-soft); border: 1px solid var(--hairline); border-radius: var(--r-lg); padding: 24px; margin: 32px 0; }
.info-box__label { font-size: 11px; font-weight: 600; letter-spacing: 0.88px; text-transform: uppercase; color: var(--muted); margin-bottom: 8px; display: block; }
.info-box p { margin-bottom: 0; font-size: 15px; }

.data-table { width: 100%; border-collapse: collapse; margin: 32px 0; font-size: 14px; }
.data-table th { background: var(--surface-strong); color: var(--ink); font-weight: 600; padding: 10px 16px; text-align: left; border-bottom: 1px solid var(--hairline-strong); }
.data-table td { padding: 10px 16px; border-bottom: 1px solid var(--hairline-soft); color: var(--body); }
.data-table tr:last-child td { border-bottom: none; }

.contact-section { padding: 80px 0; }
.contact-form { background: var(--surface-card); border: 1px solid var(--hairline); border-radius: var(--r-lg); padding: 40px; max-width: 600px; }
.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); border: 1px solid var(--hairline-strong); border-radius: var(--r-md); padding: 12px 16px; font-size: 16px; font-family: inherit; transition: border-color 0.15s; outline: none; }
.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-group textarea { resize: vertical; min-height: 120px; }
.form-group .field-error { font-size: 13px; color: var(--error); margin-top: 4px; display: none; }
.form-group .field-error.visible { display: block; }
.form-status { padding: 16px 20px; border-radius: var(--r-md); font-size: 15px; margin-top: 20px; display: none; }
.form-status.success { background: #e6f4ef; color: var(--success); border: 1px solid #b3ddd1; }

.rh-footer { background: var(--canvas); border-top: 1px solid var(--hairline); padding: 64px 0 0; }
.rh-footer__inner { max-width: 1200px; margin: 0 auto; padding: 0 24px; display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; }
.rh-footer__logo { display: flex; align-items: center; gap: 8px; text-decoration: none; color: var(--ink); font-weight: 600; font-size: 15px; margin-bottom: 12px; }
.rh-footer__logo:hover { text-decoration: none; color: var(--ink); }
.rh-footer__tagline { font-size: 14px; color: var(--muted); line-height: 1.5; }
.rh-footer__heading { font-size: 11px; font-weight: 600; letter-spacing: 0.88px; text-transform: uppercase; color: var(--muted); margin-bottom: 16px; }
.rh-footer__links { list-style: none; }
.rh-footer__links li { margin-bottom: 8px; }
.rh-footer__links a { font-size: 14px; color: var(--body); text-decoration: none; }
.rh-footer__links a:hover { color: var(--ink); }
.rh-footer__address { font-style: normal; }
.rh-footer__address p { font-size: 14px; color: var(--body); margin-bottom: 4px; }
.rh-footer__address a { font-size: 14px; color: var(--body); }
.rh-footer__bottom { max-width: 1200px; margin: 0 auto; padding: 24px; border-top: 1px solid var(--hairline); margin-top: 48px; display: flex; gap: 24px; flex-wrap: wrap; justify-content: space-between; }
.rh-footer__bottom p { font-size: 13px; color: var(--muted); margin: 0; }
.rh-footer__bottom a { color: var(--muted); }

.cookie-banner { position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%); width: calc(100% - 48px); max-width: 700px; background: var(--ink); color: var(--canvas); border-radius: var(--r-lg); padding: 20px 24px; z-index: 999; display: none; }
.cookie-banner.visible { display: block; }
.cookie-banner__inner { display: flex; align-items: center; gap: 20px; flex-wrap: wrap; }
.cookie-banner__text { font-size: 14px; color: var(--canvas-soft); flex: 1; min-width: 200px; margin: 0; line-height: 1.5; }
.cookie-banner__actions { display: flex; gap: 8px; flex-shrink: 0; }
.cookie-banner .btn--primary { background: var(--primary); color: var(--on-primary); }
.cookie-banner .btn--secondary { background: transparent; color: var(--canvas-soft); border-color: #4a4940; }
.cookie-banner .btn--secondary:hover { background: #4a4940; }

.page-hero { padding: 64px 0 48px; border-bottom: 1px solid var(--hairline); }
.page-hero__title { font-size: clamp(28px, 4vw, 48px); font-weight: 400; letter-spacing: -0.02em; margin-bottom: 16px; }
.page-hero__desc { font-size: 18px; color: var(--body); line-height: 1.6; max-width: 600px; }

.page-content { padding: 48px 0 80px; }
.page-content h2 { font-size: clamp(20px, 2.5vw, 28px); margin-top: 48px; margin-bottom: 12px; }
.page-content h3 { font-size: 18px; font-weight: 600; margin-top: 28px; margin-bottom: 8px; }
.page-content p { color: var(--body); line-height: 1.7; margin-bottom: 16px; }
.page-content ul, .page-content ol { padding-left: 24px; margin-bottom: 16px; color: var(--body); line-height: 1.7; }
.page-content li { margin-bottom: 6px; }
.page-content a { color: var(--ink); }

.breadcrumb { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--muted); margin-bottom: 20px; flex-wrap: wrap; }
.breadcrumb a { color: var(--muted); text-decoration: none; }
.breadcrumb a:hover { color: var(--ink); }
.breadcrumb__sep { color: var(--hairline-strong); }

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

@media (max-width: 1024px) {
    .grid-3 { grid-template-columns: repeat(2, 1fr); }
    .rh-footer__inner { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
    .rh-nav__hamburger { display: flex; }
    .rh-nav__menu { display: none; position: absolute; top: 64px; left: 0; right: 0; background: var(--canvas); border-bottom: 1px solid var(--hairline); flex-direction: column; padding: 12px; gap: 2px; }
    .rh-nav__menu.open { display: flex; }
    .rh-nav__link { width: 100%; }
    .grid-3, .grid-2 { grid-template-columns: 1fr; }
    .rh-footer__inner { grid-template-columns: 1fr 1fr; gap: 32px; }
    .hero__image img { height: 260px; }
    .contact-form { padding: 24px; }
    .article-body img { border-radius: var(--r-md); }
}

@media (max-width: 480px) {
    .rh-footer__inner { grid-template-columns: 1fr; }
    .rh-footer__bottom { flex-direction: column; gap: 8px; }
    .cookie-banner { bottom: 12px; width: calc(100% - 24px); }
    .cookie-banner__inner { flex-direction: column; align-items: flex-start; }
}