*, *::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;
  --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-weight: 400; line-height: 1.5; }

a { color: var(--ink); text-decoration: none; }
a:hover { color: var(--primary); }
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; }

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

.rh-nav { background: var(--canvas); border-bottom: 1px solid var(--hairline); position: sticky; top: 0; z-index: 100; }
.rh-nav__inner { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.rh-nav__logo { font-size: 18px; font-weight: 600; letter-spacing: -0.02em; color: var(--ink); }
.rh-nav__logo span { color: var(--primary); }
.rh-nav__links { display: flex; align-items: center; gap: 32px; }
.rh-nav__links a { font-size: 14px; font-weight: 500; color: var(--body); transition: color 0.15s; }
.rh-nav__links a:hover { color: var(--ink); }
.rh-nav__burger { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 4px; }
.rh-nav__burger span { display: block; width: 22px; height: 2px; background: var(--ink); border-radius: 2px; transition: transform 0.2s, opacity 0.2s; }
.rh-nav__burger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.rh-nav__burger.open span:nth-child(2) { opacity: 0; }
.rh-nav__burger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.rh-hero { padding: 80px 0; border-bottom: 1px solid var(--hairline); }
.rh-hero__inner { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.rh-hero__label { display: inline-block; font-size: 11px; font-weight: 600; letter-spacing: 0.88px; text-transform: uppercase; background: var(--surface-strong); color: var(--ink); border-radius: var(--radius-pill); padding: 4px 10px; margin-bottom: 20px; }
.rh-hero h1 { font-size: 48px; font-weight: 400; line-height: 1.1; letter-spacing: -0.72px; color: var(--ink); margin-bottom: 20px; }
.rh-hero__sub { font-size: 16px; color: var(--body); line-height: 1.6; max-width: 480px; }
.rh-hero__img { border-radius: var(--radius-lg); overflow: hidden; border: 1px solid var(--hairline); aspect-ratio: 4/3; object-fit: cover; width: 100%; }

.rh-section { padding: 80px 0; }
.rh-section--alt { background: var(--canvas-soft); }
.rh-section__head { margin-bottom: 48px; }
.rh-section__label { display: inline-block; font-size: 11px; font-weight: 600; letter-spacing: 0.88px; text-transform: uppercase; color: var(--muted); margin-bottom: 12px; }
.rh-section__title { font-size: 36px; font-weight: 400; letter-spacing: -0.72px; color: var(--ink); line-height: 1.2; }
.rh-section__desc { margin-top: 12px; font-size: 16px; color: var(--body); max-width: 560px; }

.rh-grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.rh-grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }

.rh-card { background: var(--surface-card); border: 1px solid var(--hairline); border-radius: var(--radius-lg); overflow: hidden; transition: border-color 0.15s; }
.rh-card:hover { border-color: var(--hairline-strong); }
.rh-card__img { width: 100%; aspect-ratio: 16/9; object-fit: cover; }
.rh-card__body { padding: 24px; }
.rh-card__tag { font-size: 11px; font-weight: 600; letter-spacing: 0.88px; text-transform: uppercase; color: var(--muted); margin-bottom: 10px; display: block; }
.rh-card__title { font-size: 18px; font-weight: 600; color: var(--ink); line-height: 1.35; margin-bottom: 10px; }
.rh-card__title a { color: inherit; }
.rh-card__title a:hover { color: var(--primary); }
.rh-card__excerpt { font-size: 14px; color: var(--body); line-height: 1.6; }
.rh-card__meta { margin-top: 16px; font-size: 13px; color: var(--muted); }

.rh-feature-strip { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--hairline); border: 1px solid var(--hairline); border-radius: var(--radius-lg); overflow: hidden; }
.rh-feature-strip__item { background: var(--surface-card); padding: 28px 24px; }
.rh-feature-strip__num { font-size: 32px; font-weight: 400; color: var(--primary); letter-spacing: -0.5px; line-height: 1; margin-bottom: 8px; }
.rh-feature-strip__title { font-size: 16px; font-weight: 600; color: var(--ink); margin-bottom: 8px; }
.rh-feature-strip__text { font-size: 14px; color: var(--body); line-height: 1.6; }

.rh-article { padding: 64px 0; }
.rh-article__wrap { display: grid; grid-template-columns: 1fr 280px; gap: 64px; align-items: start; }
.rh-article__main { min-width: 0; }
.rh-article__sidebar { position: sticky; top: 84px; }

.rh-article__label { font-size: 11px; font-weight: 600; letter-spacing: 0.88px; text-transform: uppercase; color: var(--muted); margin-bottom: 12px; display: block; }
.rh-article h1 { font-size: 40px; font-weight: 400; letter-spacing: -0.72px; color: var(--ink); line-height: 1.15; margin-bottom: 16px; }
.rh-article__meta { font-size: 14px; color: var(--muted); margin-bottom: 32px; }
.rh-article__cover { width: 100%; border-radius: var(--radius-lg); border: 1px solid var(--hairline); aspect-ratio: 16/7; object-fit: cover; margin-bottom: 40px; }
.rh-article__body { font-size: 16px; color: var(--body); line-height: 1.7; }
.rh-article__body h2 { font-size: 26px; font-weight: 400; color: var(--ink); letter-spacing: -0.325px; margin: 40px 0 16px; }
.rh-article__body h3 { font-size: 20px; font-weight: 600; color: var(--ink); margin: 28px 0 12px; }
.rh-article__body p { margin-bottom: 20px; }
.rh-article__body ul, .rh-article__body ol { padding-left: 24px; margin-bottom: 20px; list-style: disc; }
.rh-article__body ol { list-style: decimal; }
.rh-article__body li { margin-bottom: 8px; }
.rh-article__body a { color: var(--primary); text-decoration: underline; text-underline-offset: 3px; }
.rh-article__body blockquote { border-left: 3px solid var(--hairline-strong); padding-left: 20px; color: var(--muted); font-size: 15px; margin: 28px 0; }
.rh-article__body .note-box { background: var(--canvas-soft); border: 1px solid var(--hairline); border-radius: var(--radius-md); padding: 20px 24px; margin: 28px 0; }
.rh-article__body .note-box strong { color: var(--ink); display: block; margin-bottom: 6px; font-size: 13px; font-weight: 600; letter-spacing: 0.5px; text-transform: uppercase; }

.rh-sidebar-card { background: var(--surface-card); border: 1px solid var(--hairline); border-radius: var(--radius-lg); padding: 24px; margin-bottom: 24px; }
.rh-sidebar-card h4 { font-size: 14px; font-weight: 600; color: var(--ink); margin-bottom: 16px; text-transform: uppercase; letter-spacing: 0.5px; }
.rh-sidebar-card ul { display: flex; flex-direction: column; gap: 10px; }
.rh-sidebar-card ul li a { font-size: 14px; color: var(--body); display: block; padding-bottom: 10px; border-bottom: 1px solid var(--hairline-soft); }
.rh-sidebar-card ul li:last-child a { border-bottom: none; padding-bottom: 0; }
.rh-sidebar-card ul li a:hover { color: var(--ink); }

.rh-form-wrap { background: var(--surface-card); border: 1px solid var(--hairline); border-radius: var(--radius-lg); padding: 40px; }
.rh-form-wrap h2 { font-size: 26px; font-weight: 400; color: var(--ink); margin-bottom: 8px; letter-spacing: -0.3px; }
.rh-form-wrap p { font-size: 15px; color: var(--body); margin-bottom: 28px; }
.rh-form__group { margin-bottom: 20px; }
.rh-form__group label { display: block; font-size: 14px; font-weight: 500; color: var(--ink); margin-bottom: 6px; }
.rh-form__group input, .rh-form__group textarea { width: 100%; background: var(--surface-card); border: 1px solid var(--hairline-strong); border-radius: var(--radius-md); padding: 12px 16px; font-size: 16px; font-family: inherit; color: var(--ink); height: 44px; transition: border-color 0.15s; }
.rh-form__group textarea { height: auto; min-height: 120px; resize: vertical; }
.rh-form__group input:focus, .rh-form__group textarea:focus { outline: none; border-color: var(--ink); }
.rh-form__row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.rh-form__msg { display: none; padding: 14px 18px; border-radius: var(--radius-md); font-size: 14px; margin-top: 16px; }
.rh-form__msg--success { background: #d4edda; color: #1f8a65; border: 1px solid #a3d9b1; display: block; }
.rh-form__msg--error { background: #fde8ec; color: var(--error); border: 1px solid #f5b8c4; display: block; }

.rh-btn { display: inline-flex; align-items: center; justify-content: center; font-size: 14px; font-weight: 500; font-family: inherit; border: none; cursor: pointer; border-radius: var(--radius-md); padding: 10px 18px; height: 40px; transition: background 0.15s; line-height: 1; }
.rh-btn--primary { background: var(--primary); color: var(--on-primary); }
.rh-btn--primary:hover { background: var(--primary-active); color: var(--on-primary); }
.rh-btn--secondary { background: var(--surface-card); color: var(--ink); border: 1px solid var(--hairline-strong); }
.rh-btn--secondary:hover { background: var(--canvas-soft); }
.rh-btn--lg { height: 44px; padding: 12px 20px; font-size: 15px; }
.rh-btn--submit { width: 100%; height: 44px; font-size: 15px; }
.rh-btn:disabled { opacity: 0.6; cursor: not-allowed; }

.rh-page { padding: 64px 0; }
.rh-page__title { font-size: 40px; font-weight: 400; letter-spacing: -0.72px; color: var(--ink); margin-bottom: 12px; }
.rh-page__updated { font-size: 14px; color: var(--muted); margin-bottom: 40px; }
.rh-page__body { font-size: 16px; color: var(--body); line-height: 1.7; max-width: 720px; }
.rh-page__body h2 { font-size: 24px; font-weight: 400; color: var(--ink); margin: 36px 0 14px; letter-spacing: -0.3px; }
.rh-page__body h3 { font-size: 18px; font-weight: 600; color: var(--ink); margin: 24px 0 10px; }
.rh-page__body p { margin-bottom: 18px; }
.rh-page__body ul, .rh-page__body ol { padding-left: 24px; margin-bottom: 18px; list-style: disc; }
.rh-page__body ol { list-style: decimal; }
.rh-page__body li { margin-bottom: 6px; }
.rh-page__body a { color: var(--primary); text-decoration: underline; text-underline-offset: 3px; }

.rh-footer { background: var(--canvas); border-top: 1px solid var(--hairline); padding: 64px 0 0; }
.rh-footer__inner { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 48px; padding-bottom: 48px; }
.rh-footer__logo { font-size: 16px; font-weight: 600; color: var(--ink); display: block; margin-bottom: 12px; }
.rh-footer__logo span { color: var(--primary); }
.rh-footer__desc { font-size: 14px; color: var(--body); line-height: 1.6; }
.rh-footer__heading { font-size: 11px; font-weight: 600; letter-spacing: 0.88px; text-transform: uppercase; color: var(--muted); display: block; margin-bottom: 16px; }
.rh-footer__col ul { display: flex; flex-direction: column; gap: 10px; }
.rh-footer__col ul li a { font-size: 14px; color: var(--body); }
.rh-footer__col ul li a:hover { color: var(--ink); }
.rh-footer__bottom { border-top: 1px solid var(--hairline); padding: 20px 0; }
.rh-footer__bottom .rh-container { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.rh-footer__bottom p { font-size: 13px; color: var(--muted); }
.rh-footer__bottom a { color: var(--body); }
.rh-footer__bottom a:hover { color: var(--ink); }

.rh-cookie { display: none; position: fixed; bottom: 24px; left: 24px; right: 24px; max-width: 560px; background: var(--ink); color: var(--canvas); border-radius: var(--radius-lg); padding: 20px 24px; z-index: 9999; box-shadow: 0 4px 24px rgba(38,37,30,0.18); }
.rh-cookie.visible { display: block; }
.rh-cookie__inner { display: flex; align-items: center; justify-content: space-between; gap: 20px; flex-wrap: wrap; }
.rh-cookie p { font-size: 14px; color: var(--canvas); line-height: 1.5; }
.rh-cookie p a { color: var(--canvas); text-decoration: underline; }
.rh-cookie__actions { display: flex; gap: 8px; flex-shrink: 0; }
.rh-cookie__actions .rh-btn--primary { background: var(--primary); }
.rh-cookie__actions .rh-btn--secondary { background: transparent; border-color: rgba(247,247,244,0.3); color: var(--canvas); }
.rh-cookie__actions .rh-btn--secondary:hover { background: rgba(247,247,244,0.1); }

.rh-breadcrumb { padding: 20px 0; font-size: 14px; color: var(--muted); border-bottom: 1px solid var(--hairline-soft); }
.rh-breadcrumb a { color: var(--body); }
.rh-breadcrumb a:hover { color: var(--ink); }
.rh-breadcrumb span { margin: 0 6px; }

.rh-disclaimer { background: var(--canvas-soft); border: 1px solid var(--hairline); border-radius: var(--radius-md); padding: 16px 20px; font-size: 13px; color: var(--muted); margin-top: 48px; line-height: 1.6; }

@media (max-width: 1024px) {
  .rh-article__wrap { grid-template-columns: 1fr; }
  .rh-article__sidebar { position: static; }
  .rh-hero__inner { grid-template-columns: 1fr; }
  .rh-hero h1 { font-size: 40px; }
  .rh-footer__inner { grid-template-columns: 1fr 1fr; }
  .rh-grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .rh-nav__links { display: none; flex-direction: column; position: absolute; top: 64px; left: 0; right: 0; background: var(--canvas); border-bottom: 1px solid var(--hairline); padding: 20px 24px; gap: 18px; }
  .rh-nav__links.open { display: flex; }
  .rh-nav__burger { display: flex; }
  .rh-nav { position: sticky; }
  .rh-hero { padding: 48px 0; }
  .rh-hero h1 { font-size: 32px; }
  .rh-section { padding: 48px 0; }
  .rh-section__title { font-size: 28px; }
  .rh-grid-3, .rh-grid-2 { grid-template-columns: 1fr; }
  .rh-feature-strip { grid-template-columns: 1fr; }
  .rh-footer__inner { grid-template-columns: 1fr; gap: 32px; }
  .rh-footer__bottom .rh-container { flex-direction: column; align-items: flex-start; }
  .rh-form__row { grid-template-columns: 1fr; }
  .rh-article h1 { font-size: 30px; }
  .rh-page__title { font-size: 30px; }
  .rh-form-wrap { padding: 24px; }
}