:root {
  --color-canvas: #f7f7f4;
  --color-canvas-soft: #fafaf7;
  --color-surface-card: #ffffff;
  --color-surface-strong: #e6e5e0;
  --color-primary: #f54e00;
  --color-primary-active: #d04200;
  --color-ink: #26251e;
  --color-body: #5a5852;
  --color-body-strong: #26251e;
  --color-muted: #807d72;
  --color-muted-soft: #a09c92;
  --color-on-primary: #ffffff;
  --color-hairline: #e6e5e0;
  --color-hairline-soft: #efeee8;
  --color-hairline-strong: #cfcdc4;
  --color-success: #1f8a65;
  --color-error: #cf2d56;
  --rounded-xs: 4px;
  --rounded-sm: 6px;
  --rounded-md: 8px;
  --rounded-lg: 12px;
  --rounded-xl: 16px;
  --rounded-pill: 9999px;
  --font-sans: 'Inter', system-ui, 'Helvetica Neue', Helvetica, Arial, sans-serif;
  --font-mono: 'JetBrains Mono', 'Courier New', monospace;
  --nav-h: 64px;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--color-canvas);
  color: var(--color-body);
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.5;
}

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

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

.rh-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-canvas);
  border-bottom: 1px solid var(--color-hairline);
  height: var(--nav-h);
}

.rh-nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.rh-nav__logo {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-ink);
  letter-spacing: -0.01em;
  text-decoration: none;
}

.rh-nav__logo-dot { color: var(--color-primary); }

.rh-nav__menu {
  display: flex;
  align-items: center;
  gap: 32px;
}

.rh-nav__link {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-body);
  transition: color 0.15s;
}

.rh-nav__link:hover { color: var(--color-ink); }

.rh-nav__dropdown { position: relative; }

.rh-nav__sub {
  display: none;
  position: absolute;
  top: calc(100% + 12px);
  left: -16px;
  background: var(--color-surface-card);
  border: 1px solid var(--color-hairline);
  border-radius: var(--rounded-lg);
  min-width: 280px;
  padding: 8px 0;
  z-index: 200;
}

.rh-nav__dropdown:hover .rh-nav__sub,
.rh-nav__dropdown:focus-within .rh-nav__sub { display: block; }

.rh-nav__sub-link {
  display: block;
  padding: 10px 20px;
  font-size: 14px;
  color: var(--color-body);
  transition: background 0.1s, color 0.1s;
}

.rh-nav__sub-link:hover {
  background: var(--color-canvas-soft);
  color: var(--color-ink);
}

.rh-nav__burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.rh-nav__burger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-ink);
  border-radius: 2px;
  transition: transform 0.2s, opacity 0.2s;
}

.rh-hero {
  padding: 80px 0;
  background: var(--color-canvas);
  border-bottom: 1px solid var(--color-hairline-soft);
}

.rh-hero__label {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.88px;
  text-transform: uppercase;
  color: var(--color-muted);
  background: var(--color-surface-strong);
  border-radius: var(--rounded-pill);
  padding: 4px 12px;
  margin-bottom: 24px;
}

.rh-hero__h1 {
  font-size: 72px;
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -2.16px;
  color: var(--color-ink);
  max-width: 900px;
  margin-bottom: 24px;
}

.rh-hero__lead {
  font-size: 18px;
  line-height: 1.6;
  color: var(--color-body);
  max-width: 620px;
  margin-bottom: 48px;
}

.rh-hero__img {
  margin-top: 48px;
  border-radius: var(--rounded-lg);
  border: 1px solid var(--color-hairline);
  overflow: hidden;
  max-height: 480px;
}

.rh-hero__img img {
  width: 100%;
  height: 480px;
  object-fit: cover;
}

.rh-section {
  padding: 80px 0;
}

.rh-section--alt {
  background: var(--color-canvas-soft);
  border-top: 1px solid var(--color-hairline-soft);
  border-bottom: 1px solid var(--color-hairline-soft);
}

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

.rh-section__h2 {
  font-size: 36px;
  font-weight: 400;
  letter-spacing: -0.72px;
  line-height: 1.2;
  color: var(--color-ink);
  margin-bottom: 16px;
}

.rh-section__lead {
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-body);
  max-width: 680px;
  margin-bottom: 48px;
}

.rh-grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.rh-grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.rh-card {
  background: var(--color-surface-card);
  border: 1px solid var(--color-hairline);
  border-radius: var(--rounded-lg);
  padding: 24px;
  transition: border-color 0.15s;
}

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

.rh-card__img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: var(--rounded-md);
  margin-bottom: 20px;
}

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

.rh-card__h3 {
  font-size: 18px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--color-ink);
  margin-bottom: 8px;
}

.rh-card__h3 a { color: inherit; text-decoration: none; }
.rh-card__h3 a:hover { color: var(--color-primary); }

.rh-card__text {
  font-size: 14px;
  line-height: 1.6;
  color: var(--color-body);
  margin-bottom: 16px;
}

.rh-card__date {
  font-size: 13px;
  color: var(--color-muted);
}

.rh-card__link {
  display: inline-block;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-primary);
  margin-top: 12px;
}

.rh-card__link:hover { color: var(--color-primary-active); }

.rh-feature-card {
  display: flex;
  gap: 16px;
  background: var(--color-surface-card);
  border: 1px solid var(--color-hairline);
  border-radius: var(--rounded-lg);
  padding: 24px;
}

.rh-feature-card__icon {
  width: 40px;
  height: 40px;
  flex-shrink: 0;
  background: var(--color-surface-strong);
  border-radius: var(--rounded-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
}

.rh-feature-card__title {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-ink);
  margin-bottom: 6px;
}

.rh-feature-card__text {
  font-size: 14px;
  line-height: 1.6;
  color: var(--color-body);
}

.rh-article {
  padding: 64px 0 80px;
}

.rh-article__meta {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.rh-article__cat {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.88px;
  text-transform: uppercase;
  color: var(--color-primary);
  background: rgba(245, 78, 0, 0.08);
  border-radius: var(--rounded-pill);
  padding: 4px 12px;
}

.rh-article__date {
  font-size: 13px;
  color: var(--color-muted);
}

.rh-article__h1 {
  font-size: 48px;
  font-weight: 400;
  letter-spacing: -1.2px;
  line-height: 1.15;
  color: var(--color-ink);
  margin-bottom: 20px;
}

.rh-article__lead {
  font-size: 18px;
  line-height: 1.7;
  color: var(--color-body);
  max-width: 720px;
  margin-bottom: 40px;
}

.rh-article__hero-img {
  width: 100%;
  max-height: 460px;
  object-fit: cover;
  border-radius: var(--rounded-lg);
  border: 1px solid var(--color-hairline);
  margin-bottom: 48px;
}

.rh-article__body {
  max-width: 760px;
}

.rh-article__body h2 {
  font-size: 26px;
  font-weight: 400;
  letter-spacing: -0.325px;
  line-height: 1.25;
  color: var(--color-ink);
  margin: 40px 0 16px;
}

.rh-article__body h3 {
  font-size: 20px;
  font-weight: 600;
  line-height: 1.35;
  color: var(--color-ink);
  margin: 28px 0 12px;
}

.rh-article__body p {
  font-size: 16px;
  line-height: 1.75;
  color: var(--color-body);
  margin-bottom: 20px;
}

.rh-article__body ul, .rh-article__body ol {
  list-style: disc;
  padding-left: 24px;
  margin-bottom: 20px;
}

.rh-article__body ol { list-style: decimal; }

.rh-article__body li {
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-body);
  margin-bottom: 6px;
}

.rh-article__body strong { color: var(--color-body-strong); font-weight: 600; }

.rh-article__body a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.rh-article__body a:hover { color: var(--color-primary-active); }

.rh-article__body .rh-note {
  background: var(--color-canvas-soft);
  border-left: 3px solid var(--color-primary);
  border-radius: 0 var(--rounded-md) var(--rounded-md) 0;
  padding: 16px 20px;
  margin: 24px 0;
  font-size: 15px;
  color: var(--color-body);
}

.rh-article__body table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  font-size: 14px;
}

.rh-article__body table th {
  background: var(--color-surface-strong);
  color: var(--color-ink);
  font-weight: 600;
  padding: 10px 16px;
  text-align: left;
  border-bottom: 1px solid var(--color-hairline);
}

.rh-article__body table td {
  padding: 10px 16px;
  border-bottom: 1px solid var(--color-hairline-soft);
  color: var(--color-body);
}

.rh-article__body table tr:last-child td { border-bottom: none; }

.rh-article__body .rh-img-block {
  margin: 32px 0;
}

.rh-article__body .rh-img-block img {
  width: 100%;
  border-radius: var(--rounded-lg);
  border: 1px solid var(--color-hairline);
}

.rh-article__body .rh-img-block figcaption {
  font-size: 13px;
  color: var(--color-muted);
  margin-top: 8px;
  line-height: 1.5;
}

.rh-related {
  margin-top: 64px;
  padding-top: 48px;
  border-top: 1px solid var(--color-hairline);
}

.rh-related__h2 {
  font-size: 22px;
  font-weight: 400;
  letter-spacing: -0.11px;
  color: var(--color-ink);
  margin-bottom: 24px;
}

.rh-breadcrumb {
  padding: 16px 0;
  border-bottom: 1px solid var(--color-hairline-soft);
  margin-bottom: 0;
}

.rh-breadcrumb__list {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.rh-breadcrumb__item {
  font-size: 13px;
  color: var(--color-muted);
}

.rh-breadcrumb__item a { color: var(--color-muted); text-decoration: none; }
.rh-breadcrumb__item a:hover { color: var(--color-ink); }
.rh-breadcrumb__sep { color: var(--color-hairline-strong); }
.rh-breadcrumb__item--current { color: var(--color-body); }

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

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

.rh-form__group {
  margin-bottom: 20px;
}

.rh-form__label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-ink);
  margin-bottom: 6px;
}

.rh-form__input,
.rh-form__textarea {
  width: 100%;
  background: var(--color-surface-card);
  border: 1px solid var(--color-hairline-strong);
  border-radius: var(--rounded-md);
  padding: 12px 16px;
  font-size: 16px;
  font-family: var(--font-sans);
  color: var(--color-ink);
  height: 44px;
  transition: border-color 0.15s, box-shadow 0.15s;
  outline: none;
}

.rh-form__textarea {
  height: auto;
  min-height: 120px;
  resize: vertical;
}

.rh-form__input:focus,
.rh-form__textarea:focus {
  border-color: var(--color-ink);
  box-shadow: 0 0 0 3px rgba(38, 37, 30, 0.08);
}

.rh-form__input.error,
.rh-form__textarea.error { border-color: var(--color-error); }

.rh-form__error-msg {
  display: none;
  font-size: 13px;
  color: var(--color-error);
  margin-top: 4px;
}

.rh-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  height: 44px;
  font-size: 14px;
  font-weight: 500;
  font-family: var(--font-sans);
  border-radius: var(--rounded-md);
  border: none;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
  text-decoration: none;
}

.rh-btn--primary {
  background: var(--color-ink);
  color: var(--color-canvas);
}

.rh-btn--primary:hover { background: #3a3930; }
.rh-btn--primary:active { background: var(--color-ink); }

.rh-btn--outline {
  background: transparent;
  color: var(--color-ink);
  border: 1px solid var(--color-hairline-strong);
}

.rh-btn--outline:hover { background: var(--color-surface-card); }

.rh-form__submit-wrap {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-top: 8px;
}

.rh-form__status {
  display: none;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-success);
}

.rh-form__spinner {
  display: none;
  width: 20px;
  height: 20px;
  border: 2px solid var(--color-hairline);
  border-top-color: var(--color-ink);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

.rh-cookie {
  display: none;
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 9999;
  background: var(--color-ink);
  color: var(--color-canvas);
  border-radius: var(--rounded-lg);
  padding: 20px 28px;
  max-width: 680px;
  width: calc(100% - 48px);
  box-shadow: 0 4px 32px rgba(0,0,0,0.18);
}

.rh-cookie__inner {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  flex-wrap: wrap;
}

.rh-cookie__text {
  flex: 1;
  font-size: 14px;
  line-height: 1.6;
  color: rgba(247, 247, 244, 0.85);
  min-width: 200px;
}

.rh-cookie__text a { color: var(--color-canvas); text-decoration: underline; text-underline-offset: 2px; }

.rh-cookie__actions {
  display: flex;
  gap: 10px;
  flex-shrink: 0;
  align-items: center;
}

.rh-cookie__accept {
  background: var(--color-primary);
  color: var(--color-on-primary);
  border: none;
  border-radius: var(--rounded-md);
  padding: 8px 16px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.15s;
}

.rh-cookie__accept:hover { background: var(--color-primary-active); }

.rh-cookie__reject {
  background: transparent;
  color: rgba(247, 247, 244, 0.7);
  border: 1px solid rgba(247, 247, 244, 0.25);
  border-radius: var(--rounded-md);
  padding: 8px 16px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s;
}

.rh-cookie__reject:hover {
  color: var(--color-canvas);
  border-color: rgba(247, 247, 244, 0.5);
}

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

.rh-page-hero__h1 {
  font-size: 48px;
  font-weight: 400;
  letter-spacing: -1.2px;
  line-height: 1.15;
  color: var(--color-ink);
  margin-bottom: 16px;
}

.rh-page-hero__lead {
  font-size: 18px;
  line-height: 1.7;
  color: var(--color-body);
  max-width: 640px;
}

.rh-prose {
  max-width: 760px;
  padding: 48px 0 80px;
}

.rh-prose h2 {
  font-size: 26px;
  font-weight: 400;
  letter-spacing: -0.325px;
  color: var(--color-ink);
  margin: 36px 0 14px;
}

.rh-prose h3 {
  font-size: 20px;
  font-weight: 600;
  color: var(--color-ink);
  margin: 24px 0 10px;
}

.rh-prose p {
  font-size: 16px;
  line-height: 1.75;
  color: var(--color-body);
  margin-bottom: 18px;
}

.rh-prose ul, .rh-prose ol {
  padding-left: 24px;
  margin-bottom: 18px;
}

.rh-prose ul { list-style: disc; }
.rh-prose ol { list-style: decimal; }

.rh-prose li {
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-body);
  margin-bottom: 6px;
}

.rh-prose strong { color: var(--color-body-strong); font-weight: 600; }

.rh-prose a { color: var(--color-primary); text-decoration: underline; text-underline-offset: 3px; }
.rh-prose a:hover { color: var(--color-primary-active); }

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

.rh-footer__inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 48px;
}

.rh-footer__brand {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-ink);
  margin-bottom: 8px;
}

.rh-footer__tagline {
  font-size: 14px;
  line-height: 1.6;
  color: var(--color-muted);
  max-width: 280px;
}

.rh-footer__heading {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.88px;
  text-transform: uppercase;
  color: var(--color-muted);
  margin-bottom: 16px;
}

.rh-footer__list { display: flex; flex-direction: column; gap: 10px; }

.rh-footer__link {
  font-size: 14px;
  color: var(--color-body);
  transition: color 0.15s;
}

.rh-footer__link:hover { color: var(--color-ink); }

.rh-footer__text { font-size: 14px; color: var(--color-body); }

.rh-footer__bottom {
  border-top: 1px solid var(--color-hairline-soft);
  padding: 20px 0;
}

.rh-footer__bottom .rh-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}

.rh-footer__copy {
  font-size: 13px;
  color: var(--color-muted);
}

.rh-footer__disclaimer {
  font-size: 13px;
  color: var(--color-muted-soft);
  max-width: 520px;
  text-align: right;
}

.rh-divider {
  border: none;
  border-top: 1px solid var(--color-hairline-soft);
  margin: 40px 0;
}

@media (max-width: 1024px) {
  .rh-hero__h1 { font-size: 56px; letter-spacing: -1.5px; }
  .rh-grid-3 { grid-template-columns: repeat(2, 1fr); }
  .rh-footer__inner { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .rh-nav__menu {
    display: none;
    position: fixed;
    top: var(--nav-h);
    left: 0;
    right: 0;
    background: var(--color-canvas);
    border-bottom: 1px solid var(--color-hairline);
    flex-direction: column;
    align-items: flex-start;
    padding: 16px 24px 24px;
    gap: 4px;
  }
  .rh-nav__menu.is-open { display: flex; }
  .rh-nav__burger { display: flex; }
  .rh-nav__dropdown { width: 100%; }
  .rh-nav__sub {
    display: none;
    position: static;
    border: none;
    border-left: 2px solid var(--color-hairline);
    border-radius: 0;
    padding: 4px 0 4px 12px;
    min-width: 0;
    background: transparent;
  }
  .rh-nav__dropdown.is-open .rh-nav__sub { display: block; }
  .rh-hero__h1 { font-size: 36px; letter-spacing: -1px; }
  .rh-hero__img img { height: 260px; }
  .rh-grid-3, .rh-grid-2 { grid-template-columns: 1fr; }
  .rh-footer__inner { grid-template-columns: 1fr; gap: 32px; }
  .rh-footer__disclaimer { text-align: left; }
  .rh-article__h1 { font-size: 32px; letter-spacing: -0.5px; }
  .rh-page-hero__h1 { font-size: 32px; letter-spacing: -0.5px; }
  .rh-section__h2 { font-size: 28px; }
  .rh-cookie { bottom: 16px; }
}

@media (max-width: 480px) {
  .rh-hero { padding: 48px 0; }
  .rh-section { padding: 48px 0; }
  .rh-form__submit-wrap { flex-direction: column; align-items: flex-start; }
}