:root {
  --color-main: #172033;
  --color-main-light: #24304a;
  --color-accent: #f6c445;
  --color-bg: #f7f8fb;
  --color-white: #ffffff;
  --color-text: #222222;
  --color-muted: #666666;
  --color-border: #e4e7ef;
  --radius-lg: 20px;
  --radius-md: 14px;
  --shadow-card: 0 8px 24px rgba(20, 30, 60, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.8;
}

a {
  color: inherit;
  text-decoration: none;
}

img,
svg {
  max-width: 100%;
}

button,
input {
  font: inherit;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--color-border);
  backdrop-filter: blur(12px);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  max-width: 1120px;
  margin: 0 auto;
  padding: 14px 20px;
}

.site-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--color-main);
  min-width: 0;
}

.site-logo__mark {
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: var(--color-main);
  color: var(--color-accent);
  font-weight: 800;
}

.site-logo strong {
  display: block;
  font-size: 1.06rem;
  line-height: 1.2;
}

.site-logo small {
  display: block;
  color: var(--color-muted);
  font-size: 0.75rem;
  line-height: 1.4;
}

.global-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.92rem;
}

.global-nav a {
  border-radius: 999px;
  color: var(--color-main);
  padding: 8px 12px;
  white-space: nowrap;
}

.global-nav a:hover,
.global-nav a.is-active {
  background: var(--color-main);
  color: var(--color-white);
}

.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--color-border);
  border-radius: 12px;
  background: var(--color-white);
  padding: 10px;
}

.menu-toggle span:not(.visually-hidden) {
  display: block;
  width: 100%;
  height: 2px;
  margin: 5px 0;
  background: var(--color-main);
}

.header-search {
  display: flex;
  max-width: 1120px;
  margin: 0 auto 12px;
  padding: 0 20px;
  gap: 8px;
}

.header-search input,
.hero-search input,
.search-page-form input {
  min-width: 0;
  flex: 1;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: var(--color-white);
  color: var(--color-text);
  padding: 12px 16px;
  outline: none;
}

.header-search input:focus,
.hero-search input:focus,
.search-page-form input:focus {
  border-color: var(--color-main);
  box-shadow: 0 0 0 3px rgba(246, 196, 69, 0.35);
}

.header-search button,
.hero-search button,
.search-page-form button,
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 0;
  border-radius: 999px;
  background: var(--color-accent);
  color: var(--color-main);
  cursor: pointer;
  font-weight: 700;
  min-height: 44px;
  padding: 10px 18px;
  white-space: nowrap;
}

.button--primary {
  background: var(--color-main);
  color: var(--color-white);
}

.button--full {
  width: 100%;
  margin-top: 18px;
}

.site-main {
  max-width: 1120px;
  margin: 0 auto;
  padding: 24px 20px 64px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(280px, 0.8fr);
  align-items: center;
  gap: 28px;
  padding: 42px 0 26px;
}

.hero__content h1 {
  max-width: 720px;
  margin: 10px 0 14px;
  color: var(--color-main);
  font-size: clamp(2rem, 5vw, 4rem);
  line-height: 1.18;
}

.hero__content p {
  max-width: 660px;
  color: var(--color-muted);
  font-size: 1.05rem;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--color-main);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

.hero-search,
.search-page-form {
  display: flex;
  gap: 10px;
  max-width: 680px;
  margin: 24px 0 14px;
}

.hero__chips,
.keyword-cloud,
.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.hero__chips a,
.keyword-cloud a,
.tag-list span,
.tag-list a {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: var(--color-white);
  color: var(--color-main);
  font-size: 0.86rem;
  padding: 5px 11px;
}

.tag-list--large a {
  min-height: 36px;
}

.hero__panel {
  display: grid;
  gap: 12px;
  padding: 20px;
  border-radius: var(--radius-lg);
  background: var(--color-main);
  box-shadow: var(--shadow-card);
}

.rule-note {
  display: grid;
  grid-template-columns: 42px 1fr;
  gap: 4px 12px;
  align-items: center;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.06);
  color: var(--color-white);
  padding: 14px;
}

.rule-note span {
  display: grid;
  place-items: center;
  grid-row: span 2;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--color-accent);
  color: var(--color-main);
  font-weight: 800;
}

.rule-note small {
  color: rgba(255, 255, 255, 0.76);
}

.section {
  margin-top: 48px;
}

.section--narrow {
  max-width: 820px;
  margin-right: auto;
  margin-left: auto;
}

.section--split,
.section--two-column {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 22px;
  align-items: start;
}

.section__header {
  margin-bottom: 18px;
}

.section__header h2,
.page-heading h1,
.content-block h2,
.content-card h2,
.side-panel h2,
.guide-card h2 {
  margin: 0;
  color: var(--color-main);
  line-height: 1.35;
}

.section__header p,
.page-heading p {
  color: var(--color-muted);
}

.section__header--compact {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 12px;
}

.section__header--compact p {
  margin: 0;
}

.category-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.category-card,
.article-card,
.content-card,
.info-panel,
.media-placeholder,
.side-panel,
.summary-box,
.content-block,
.empty-state,
.guide-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-white);
  box-shadow: var(--shadow-card);
}

.category-card {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 18px;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.category-card:hover,
.article-card:hover {
  border-color: rgba(23, 32, 51, 0.24);
  transform: translateY(-2px);
}

.category-card__icon {
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  width: 44px;
  height: 44px;
  border-radius: 14px;
  background: #fff3c7;
  color: var(--color-main);
  font-weight: 800;
}

.category-card__body strong,
.category-card__body small {
  display: block;
}

.category-card__body small {
  margin-top: 4px;
  color: var(--color-muted);
  font-size: 0.86rem;
  line-height: 1.65;
}

.article-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.article-grid--compact {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.article-card {
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.article-card__link {
  display: flex;
  flex-direction: column;
  height: 100%;
  padding: 20px;
}

.article-card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 10px;
}

.article-card__meta span {
  border-radius: 999px;
  background: var(--color-bg);
  color: var(--color-muted);
  font-size: 0.78rem;
  padding: 3px 8px;
}

.article-card h3 {
  margin: 0 0 8px;
  color: var(--color-main);
  font-size: 1.06rem;
  line-height: 1.5;
}

.article-card p {
  flex: 1;
  margin: 0 0 14px;
  color: var(--color-muted);
  font-size: 0.92rem;
}

.article-card--compact .article-card__link {
  padding: 16px;
}

.info-panel,
.media-placeholder,
.content-card,
.side-panel,
.empty-state,
.guide-card {
  padding: 22px;
}

.quick-list {
  display: grid;
  gap: 10px;
}

.quick-list a {
  display: grid;
  gap: 2px;
  border-radius: var(--radius-md);
  background: var(--color-bg);
  padding: 14px;
}

.quick-list span,
.media-placeholder p,
.content-card p,
.empty-state p,
.guide-card p {
  color: var(--color-muted);
}

.media-placeholder {
  background:
    linear-gradient(135deg, rgba(246, 196, 69, 0.24), rgba(255, 255, 255, 0) 45%),
    var(--color-white);
}

.page-heading {
  padding: 26px 0 8px;
}

.page-heading h1 {
  margin-top: 8px;
  font-size: clamp(1.8rem, 4vw, 3.2rem);
}

.page-heading--search {
  max-width: 800px;
}

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  color: var(--color-muted);
  font-size: 0.86rem;
  margin-bottom: 18px;
}

.breadcrumbs a {
  color: var(--color-main);
  font-weight: 700;
}

.side-link-list,
.sitemap-list,
.guide-card__links {
  display: grid;
  gap: 8px;
}

.side-link-list a,
.sitemap-list a,
.guide-card__links a {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-white);
  padding: 10px 12px;
}

.side-link-list a.is-active,
.side-link-list a:hover,
.sitemap-list a:hover,
.guide-card__links a:hover {
  border-color: var(--color-main);
  background: var(--color-main);
  color: var(--color-white);
}

.article-layout {
  padding-top: 20px;
}

.article-hero {
  border-radius: var(--radius-lg);
  background: var(--color-white);
  box-shadow: var(--shadow-card);
  padding: clamp(24px, 5vw, 44px);
}

.article-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 14px;
}

.article-hero__meta a,
.article-hero__meta span {
  border-radius: 999px;
  background: var(--color-bg);
  color: var(--color-muted);
  font-size: 0.84rem;
  padding: 5px 10px;
}

.article-hero__meta a {
  background: #fff3c7;
  color: var(--color-main);
  font-weight: 700;
}

.article-hero h1 {
  margin: 0 0 14px;
  color: var(--color-main);
  font-size: clamp(1.9rem, 5vw, 3.4rem);
  line-height: 1.28;
}

.article-hero p {
  max-width: 780px;
  color: var(--color-muted);
  font-size: 1.05rem;
}

.article-body {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  align-items: start;
  gap: 22px;
  margin-top: 22px;
}

.article-sidebar {
  position: sticky;
  top: 130px;
  display: grid;
  gap: 14px;
}

.toc,
.notice-box {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-white);
  padding: 18px;
}

.toc h2,
.notice-box h2 {
  margin: 0 0 10px;
  color: var(--color-main);
  font-size: 1rem;
}

.toc a {
  display: block;
  border-radius: 10px;
  color: var(--color-muted);
  font-size: 0.9rem;
  padding: 7px 8px;
}

.toc a:hover {
  background: var(--color-bg);
  color: var(--color-main);
}

.notice-box {
  background: #fff8df;
}

.notice-box p {
  margin-bottom: 0;
  color: #5e4a0a;
  font-size: 0.92rem;
}

.article-content {
  display: grid;
  gap: 18px;
}

.summary-box,
.content-block {
  padding: clamp(20px, 4vw, 30px);
  scroll-margin-top: 150px;
}

.summary-box {
  border-color: rgba(246, 196, 69, 0.7);
  background: #fff8df;
}

.summary-box h2,
.content-block h2 {
  margin-bottom: 14px;
  font-size: 1.35rem;
}

.summary-box ul,
.step-list {
  margin: 0;
  padding-left: 1.2rem;
}

.summary-box li,
.step-list li {
  margin: 8px 0;
}

.content-block p {
  margin: 0 0 14px;
}

.table-scroll {
  overflow-x: auto;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

table {
  width: 100%;
  min-width: 560px;
  border-collapse: collapse;
  background: var(--color-white);
}

th,
td {
  border-bottom: 1px solid var(--color-border);
  padding: 12px 14px;
  text-align: left;
  vertical-align: top;
}

th {
  background: var(--color-main);
  color: var(--color-white);
  font-weight: 700;
}

tr:last-child td {
  border-bottom: 0;
}

.media-placeholder--article {
  box-shadow: none;
}

.faq-list {
  display: grid;
  gap: 10px;
}

.faq-list details {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg);
  padding: 12px 14px;
}

.faq-list summary {
  cursor: pointer;
  color: var(--color-main);
  font-weight: 700;
}

.faq-list p {
  margin: 10px 0 0;
  color: var(--color-muted);
}

.guide-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.guide-card > span {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--color-accent);
  color: var(--color-main);
  font-weight: 800;
}

.site-footer {
  background: var(--color-main);
  color: var(--color-white);
  padding: 42px 20px 22px;
}

.site-footer__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, 0.7fr);
  gap: 28px;
  max-width: 1120px;
  margin: 0 auto;
}

.site-logo--footer {
  color: var(--color-white);
}

.site-logo--footer .site-logo__mark {
  background: var(--color-accent);
  color: var(--color-main);
}

.site-logo--footer small,
.site-footer__brand p {
  color: rgba(255, 255, 255, 0.76);
}

.site-footer__brand p {
  max-width: 620px;
}

.site-footer__links {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.site-footer__links h2 {
  margin: 0 0 10px;
  color: var(--color-accent);
  font-size: 1rem;
}

.site-footer__links a {
  display: block;
  color: rgba(255, 255, 255, 0.82);
  margin: 6px 0;
}

.site-footer__copy {
  max-width: 1120px;
  margin: 26px auto 0;
  color: rgba(255, 255, 255, 0.62);
  font-size: 0.86rem;
}

@media (max-width: 900px) {
  .menu-toggle {
    display: block;
  }

  .global-nav {
    display: none;
    position: absolute;
    top: 72px;
    right: 20px;
    left: 20px;
    flex-direction: column;
    align-items: stretch;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    background: var(--color-white);
    box-shadow: var(--shadow-card);
    padding: 12px;
  }

  .global-nav.is-open {
    display: flex;
  }

  .global-nav a {
    border-radius: 12px;
  }

  .hero,
  .section--split,
  .section--two-column,
  .article-body,
  .site-footer__inner {
    grid-template-columns: 1fr;
  }

  .article-sidebar {
    position: static;
    order: 2;
  }

  .category-grid,
  .article-grid,
  .guide-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .site-header__inner,
  .header-search,
  .site-main {
    padding-right: 14px;
    padding-left: 14px;
  }

  .site-logo small {
    display: none;
  }

  .header-search,
  .hero-search,
  .search-page-form {
    flex-direction: column;
  }

  .header-search button,
  .hero-search button,
  .search-page-form button {
    width: 100%;
  }

  .hero {
    padding-top: 26px;
  }

  .category-grid,
  .article-grid,
  .guide-grid,
  .site-footer__links {
    grid-template-columns: 1fr;
  }

  .section {
    margin-top: 36px;
  }

  .section__header--compact {
    display: block;
  }

  .article-hero,
  .summary-box,
  .content-block,
  .content-card,
  .info-panel,
  .media-placeholder,
  .side-panel,
  .empty-state,
  .guide-card {
    border-radius: 16px;
  }

  table {
    min-width: 480px;
  }
}