*, *::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;
  --ink: #26251e;
  --body: #5a5852;
  --body-strong: #26251e;
  --muted: #807d72;
  --muted-soft: #a09c92;
  --on-primary: #ffffff;
  --hairline: #e6e5e0;
  --hairline-soft: #efeee8;
  --hairline-strong: #cfcdc4;
  --success: #1f8a65;
  --error: #cf2d56;
  --font-sans: 'Inter', system-ui, 'Helvetica Neue', Helvetica, Arial, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --radius-xs: 4px;
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-pill: 9999px;
}

html { scroll-behavior: smooth; }

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

a { color: var(--ink); text-decoration: none; }
a:hover { color: var(--primary); }

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

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

.site-header {
  background: var(--canvas);
  border-bottom: 1px solid var(--hairline);
  height: 64px;
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.site-logo {
  font-family: var(--font-sans);
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: -0.02em;
}

.site-logo:hover { color: var(--primary); }

.main-nav ul {
  display: flex;
  gap: 32px;
  list-style: none;
}

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

.main-nav a:hover,
.main-nav a.active { color: var(--ink); }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--ink);
  border-radius: 2px;
  transition: all 0.2s;
}

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

.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.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);
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  margin-bottom: 20px;
}

.hero-title {
  font-size: 52px;
  font-weight: 400;
  color: var(--ink);
  line-height: 1.1;
  letter-spacing: -1.5px;
  margin-bottom: 20px;
}

.hero-desc {
  font-size: 16px;
  color: var(--body);
  line-height: 1.6;
  margin-bottom: 32px;
  max-width: 440px;
}

.hero-img {
  border-radius: var(--radius-lg);
  border: 1px solid var(--hairline);
  overflow: hidden;
  background: var(--surface-card);
}

.hero-img img {
  width: 100%;
  height: 360px;
  object-fit: cover;
}

.section {
  padding: 80px 0;
}

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

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

.section-desc {
  font-size: 16px;
  color: var(--body);
  max-width: 560px;
  margin-bottom: 48px;
}

.section-alt { background: var(--canvas-soft); }

.card-grid {
  display: grid;
  gap: 24px;
}

.card-grid-3 { grid-template-columns: repeat(3, 1fr); }
.card-grid-2 { grid-template-columns: repeat(2, 1fr); }

.card {
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.card-img {
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-bottom: 20px;
  border: 1px solid var(--hairline-soft);
}

.card-img img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

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

.card-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 10px;
  line-height: 1.35;
}

.card-title a { color: var(--ink); }
.card-title a:hover { color: var(--primary); }

.card-body {
  font-size: 14px;
  color: var(--body);
  line-height: 1.55;
}

.card-meta {
  font-size: 13px;
  color: var(--muted);
  margin-top: 16px;
}

.info-grid {
  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;
}

.info-cell {
  background: var(--surface-card);
  padding: 28px 24px;
}

.info-cell-number {
  font-size: 36px;
  font-weight: 400;
  color: var(--ink);
  letter-spacing: -0.72px;
  line-height: 1;
  margin-bottom: 8px;
}

.info-cell-label {
  font-size: 14px;
  color: var(--body);
}

.divider {
  border: none;
  border-top: 1px solid var(--hairline);
  margin: 48px 0;
}

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

.article-meta {
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 16px;
}

.article-title {
  font-size: 42px;
  font-weight: 400;
  color: var(--ink);
  line-height: 1.15;
  letter-spacing: -1px;
  margin-bottom: 20px;
  max-width: 760px;
}

.article-desc {
  font-size: 18px;
  color: var(--body);
  max-width: 640px;
  line-height: 1.6;
}

.article-body {
  padding: 64px 0;
}

.article-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 64px;
  align-items: start;
}

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

.article-content h2:first-child { margin-top: 0; }

.article-content h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
  margin: 28px 0 12px;
}

.article-content p {
  font-size: 16px;
  color: var(--body);
  line-height: 1.7;
  margin-bottom: 20px;
}

.article-content ul,
.article-content ol {
  padding-left: 24px;
  margin-bottom: 20px;
}

.article-content li {
  font-size: 16px;
  color: var(--body);
  line-height: 1.65;
  margin-bottom: 8px;
}

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

.article-img-block {
  margin: 32px 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--hairline);
}

.article-img-block img {
  width: 100%;
  height: 380px;
  object-fit: cover;
}

.article-img-caption {
  font-size: 13px;
  color: var(--muted);
  padding: 10px 16px;
  background: var(--surface-card);
  border-top: 1px solid var(--hairline-soft);
}

.article-sidebar {
  position: sticky;
  top: 80px;
}

.sidebar-box {
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 24px;
}

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

.sidebar-toc {
  list-style: none;
}

.sidebar-toc li {
  margin-bottom: 10px;
}

.sidebar-toc a {
  font-size: 14px;
  color: var(--body);
  line-height: 1.4;
}

.sidebar-toc a:hover { color: var(--ink); }

.highlight-box {
  background: var(--canvas-soft);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-lg);
  padding: 24px 28px;
  margin: 32px 0;
}

.highlight-box p {
  font-size: 15px;
  color: var(--body-strong);
  line-height: 1.65;
  margin-bottom: 0;
}

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

.page-title {
  font-size: 42px;
  font-weight: 400;
  color: var(--ink);
  letter-spacing: -1px;
  margin-bottom: 16px;
}

.page-desc {
  font-size: 16px;
  color: var(--body);
  max-width: 600px;
}

.page-body {
  padding: 64px 0;
  max-width: 760px;
}

.page-body h2 {
  font-size: 22px;
  font-weight: 400;
  color: var(--ink);
  letter-spacing: -0.11px;
  margin: 40px 0 14px;
}

.page-body h2:first-child { margin-top: 0; }

.page-body p {
  font-size: 16px;
  color: var(--body);
  line-height: 1.7;
  margin-bottom: 18px;
}

.page-body ul {
  padding-left: 24px;
  margin-bottom: 18px;
}

.page-body li {
  font-size: 16px;
  color: var(--body);
  line-height: 1.65;
  margin-bottom: 8px;
}

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

.updated-note {
  font-size: 13px;
  color: var(--muted);
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--hairline-soft);
}

.contact-form {
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-lg);
  padding: 32px;
  max-width: 560px;
}

.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);
  font-family: var(--font-sans);
  font-size: 16px;
  border: 1px solid var(--hairline-strong);
  border-radius: var(--radius-md);
  padding: 12px 16px;
  height: 44px;
  outline: none;
  transition: border-color 0.15s;
}

.form-group textarea {
  height: auto;
  min-height: 120px;
  resize: vertical;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--ink);
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  background: var(--primary);
  color: var(--on-primary);
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 500;
  padding: 10px 18px;
  height: 40px;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background 0.15s;
}

.btn-primary:hover { background: var(--primary-active); color: var(--on-primary); }

.btn-secondary {
  display: inline-flex;
  align-items: center;
  background: var(--surface-card);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 500;
  padding: 10px 18px;
  height: 40px;
  border: 1px solid var(--hairline-strong);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background 0.15s;
}

.btn-secondary:hover { background: var(--surface-strong); }

.form-status {
  display: none;
  margin-top: 16px;
  padding: 14px 18px;
  border-radius: var(--radius-md);
  font-size: 14px;
}

.form-status.success {
  background: #e8f5f0;
  color: var(--success);
  border: 1px solid #b3dece;
}

.form-loading {
  display: none;
  align-items: center;
  gap: 10px;
  margin-top: 12px;
  font-size: 14px;
  color: var(--muted);
}

.spinner {
  width: 16px;
  height: 16px;
  border: 2px solid var(--hairline);
  border-top-color: var(--ink);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

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

.breadcrumb {
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 24px;
}

.breadcrumb a { color: var(--muted); }
.breadcrumb a:hover { color: var(--ink); }
.breadcrumb span { margin: 0 6px; }

.related-articles {
  padding: 64px 0;
  border-top: 1px solid var(--hairline-soft);
}

.site-footer {
  background: var(--canvas);
  border-top: 1px solid var(--hairline);
  padding: 64px 0 48px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer-logo {
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
  display: block;
  margin-bottom: 12px;
}

.footer-tagline {
  font-size: 14px;
  color: var(--body);
  line-height: 1.55;
}

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

.site-footer ul {
  list-style: none;
}

.site-footer ul li {
  margin-bottom: 10px;
}

.site-footer ul a {
  font-size: 14px;
  color: var(--body);
}

.site-footer ul a:hover { color: var(--ink); }

.footer-bottom {
  border-top: 1px solid var(--hairline-soft);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-bottom p {
  font-size: 13px;
  color: var(--muted);
}

.footer-legal a {
  font-size: 13px;
  color: var(--muted);
}

.footer-legal a:hover { color: var(--ink); }

.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--surface-card);
  border-top: 1px solid var(--hairline);
  z-index: 999;
  padding: 16px 24px;
}

.cookie-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

.cookie-inner p {
  font-size: 14px;
  color: var(--body);
}

.cookie-inner a {
  color: var(--primary);
  text-decoration: underline;
}

.cookie-buttons {
  display: flex;
  gap: 12px;
  flex-shrink: 0;
}

@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-title { font-size: 40px; }
  .card-grid-3 { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .article-layout { grid-template-columns: 1fr; }
  .article-sidebar { position: static; }
}

@media (max-width: 768px) {
  .nav-toggle { display: flex; }
  .main-nav {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--canvas);
    border-bottom: 1px solid var(--hairline);
    padding: 16px 24px;
  }
  .main-nav.open { display: block; }
  .main-nav ul { flex-direction: column; gap: 16px; }
  .hero-title { font-size: 32px; }
  .section-title { font-size: 28px; }
  .article-title { font-size: 30px; }
  .page-title { font-size: 30px; }
  .card-grid-3,
  .card-grid-2 { grid-template-columns: 1fr; }
  .info-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
  .hero-img img { height: 240px; }
  .section { padding: 48px 0; }
}

@media (max-width: 640px) {
  .hero-band { padding: 48px 0; }
  .container { padding: 0 16px; }
  .contact-form { padding: 20px; }
}