: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;
  --semantic-success: #1f8a65;
  --semantic-error: #cf2d56;
  --rounded-xs: 4px;
  --rounded-sm: 6px;
  --rounded-md: 8px;
  --rounded-lg: 12px;
  --rounded-xl: 16px;
  --rounded-pill: 9999px;
  --spacing-xxs: 4px;
  --spacing-xs: 8px;
  --spacing-sm: 12px;
  --spacing-base: 16px;
  --spacing-md: 20px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-xxl: 48px;
  --spacing-section: 80px;
}

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

html { font-size: 16px; scroll-behavior: smooth; }

body {
  background-color: var(--canvas);
  color: var(--body);
  font-family: 'Inter', system-ui, 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 16px;
  font-weight: 400;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

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

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

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-base);
}

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

.nav-inner {
  display: flex;
  align-items: center;
  gap: var(--spacing-xl);
  height: 100%;
}

.wordmark {
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: -0.01em;
  white-space: nowrap;
  flex-shrink: 0;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
  flex: 1;
}

.nav-link {
  font-size: 14px;
  font-weight: 500;
  line-height: 1.4;
  color: var(--body);
  transition: color 0.15s;
  white-space: nowrap;
}

.nav-link:hover { color: var(--ink); }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-xs);
  margin-left: auto;
}

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

.btn-primary {
  display: inline-block;
  background: var(--primary);
  color: var(--on-primary);
  font-size: 14px;
  font-weight: 500;
  padding: 10px 18px;
  height: 40px;
  border-radius: var(--rounded-md);
  border: none;
  cursor: pointer;
  line-height: 1;
  transition: background 0.15s;
  white-space: nowrap;
}

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

.btn-secondary {
  display: inline-block;
  background: var(--surface-card);
  color: var(--ink);
  font-size: 14px;
  font-weight: 500;
  padding: 10px 18px;
  height: 40px;
  border-radius: var(--rounded-md);
  border: 1px solid var(--hairline-strong);
  cursor: pointer;
  line-height: 1;
  transition: background 0.15s;
  white-space: nowrap;
}

.btn-secondary:hover { background: var(--canvas-soft); }

.hero {
  padding: var(--spacing-section) 0;
  border-bottom: 1px solid var(--hairline);
}

.hero-content {
  max-width: 760px;
}

.badge-pill {
  display: inline-block;
  background: var(--surface-strong);
  color: var(--ink);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.88px;
  text-transform: uppercase;
  border-radius: var(--rounded-pill);
  padding: 4px 10px;
  margin-bottom: var(--spacing-lg);
}

.hero h1 {
  font-size: 72px;
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -2.16px;
  color: var(--ink);
  margin-bottom: var(--spacing-lg);
}

.hero-sub {
  font-size: 16px;
  line-height: 1.5;
  color: var(--body);
  max-width: 560px;
  margin-bottom: var(--spacing-xl);
}

.hero-meta {
  font-size: 13px;
  color: var(--muted);
  margin-top: var(--spacing-xs);
}

.section {
  padding: var(--spacing-section) 0;
  border-bottom: 1px solid var(--hairline);
}

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

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

.section-sub {
  font-size: 16px;
  line-height: 1.5;
  color: var(--body);
  max-width: 640px;
  margin-bottom: var(--spacing-xxl);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-lg);
}

.card-grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-lg);
}

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

.feature-card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: var(--rounded-md);
  margin-bottom: var(--spacing-base);
}

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

.feature-card h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
  line-height: 1.4;
  margin-bottom: var(--spacing-xs);
}

.feature-card p {
  font-size: 14px;
  line-height: 1.5;
  color: var(--body);
  margin-bottom: var(--spacing-base);
}

.feature-card .card-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--primary);
}

.feature-card .card-link:hover { color: var(--primary-active); }

.article-hero {
  padding: var(--spacing-section) 0 var(--spacing-xxl);
  border-bottom: 1px solid var(--hairline);
}

.article-hero .badge-pill { margin-bottom: var(--spacing-base); }

.article-hero h1 {
  font-size: 48px;
  font-weight: 400;
  line-height: 1.15;
  letter-spacing: -0.96px;
  color: var(--ink);
  max-width: 800px;
  margin-bottom: var(--spacing-lg);
}

.article-meta {
  font-size: 13px;
  color: var(--muted);
  display: flex;
  align-items: center;
  gap: var(--spacing-base);
  flex-wrap: wrap;
}

.article-meta span { display: flex; align-items: center; gap: 4px; }

.article-body {
  max-width: 760px;
  padding: var(--spacing-section) 0;
}

.article-body h2 {
  font-size: 26px;
  font-weight: 400;
  line-height: 1.25;
  letter-spacing: -0.325px;
  color: var(--ink);
  margin-top: var(--spacing-xxl);
  margin-bottom: var(--spacing-base);
}

.article-body h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
  line-height: 1.4;
  margin-top: var(--spacing-xl);
  margin-bottom: var(--spacing-sm);
}

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

.article-body ul, .article-body ol {
  margin: var(--spacing-base) 0 var(--spacing-base) var(--spacing-xl);
}

.article-body li {
  font-size: 16px;
  line-height: 1.7;
  color: var(--body);
  margin-bottom: var(--spacing-xs);
}

.article-body img {
  width: 100%;
  max-height: 420px;
  object-fit: cover;
  border-radius: var(--rounded-lg);
  margin: var(--spacing-xl) 0;
  border: 1px solid var(--hairline);
}

.article-body .img-caption {
  font-size: 13px;
  color: var(--muted);
  text-align: center;
  margin-top: calc(-1 * var(--spacing-md));
  margin-bottom: var(--spacing-xl);
}

.article-body .callout {
  background: var(--canvas-soft);
  border: 1px solid var(--hairline);
  border-left: 3px solid var(--primary);
  border-radius: var(--rounded-md);
  padding: var(--spacing-lg);
  margin: var(--spacing-xl) 0;
}

.article-body .callout p { margin-bottom: 0; color: var(--ink); }

.article-body .ref-list {
  border-top: 1px solid var(--hairline);
  margin-top: var(--spacing-xxl);
  padding-top: var(--spacing-lg);
}

.article-body .ref-list p { font-size: 13px; color: var(--muted); }

.article-body .ref-list a { color: var(--primary); text-decoration: underline; }

.article-img-feature {
  width: 100%;
  height: 460px;
  object-fit: cover;
  border-radius: var(--rounded-lg);
  border: 1px solid var(--hairline);
  margin-bottom: var(--spacing-xxl);
}

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

.page-hero h1 {
  font-size: 36px;
  font-weight: 400;
  letter-spacing: -0.72px;
  line-height: 1.2;
  color: var(--ink);
  margin-bottom: var(--spacing-sm);
}

.page-hero p { font-size: 16px; color: var(--muted); }

.page-body {
  max-width: 760px;
  padding: var(--spacing-section) 0;
}

.page-body h2 {
  font-size: 22px;
  font-weight: 400;
  letter-spacing: -0.11px;
  color: var(--ink);
  margin-top: var(--spacing-xl);
  margin-bottom: var(--spacing-sm);
}

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

.page-body ul {
  margin: var(--spacing-base) 0 var(--spacing-base) var(--spacing-xl);
}

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

.contact-section { padding: var(--spacing-section) 0; border-top: 1px solid var(--hairline); }

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xl);
  align-items: start;
}

.contact-info h2 {
  font-size: 26px;
  font-weight: 400;
  letter-spacing: -0.325px;
  color: var(--ink);
  margin-bottom: var(--spacing-base);
}

.contact-info p {
  font-size: 16px;
  line-height: 1.6;
  color: var(--body);
  margin-bottom: var(--spacing-base);
}

.contact-form {
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-radius: var(--rounded-lg);
  padding: var(--spacing-xl);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xxs);
  margin-bottom: var(--spacing-base);
}

.form-group label {
  font-size: 14px;
  font-weight: 500;
  color: var(--ink);
}

.form-group input,
.form-group textarea {
  background: var(--surface-card);
  border: 1px solid var(--hairline-strong);
  border-radius: var(--rounded-md);
  padding: 12px 16px;
  height: 44px;
  font-size: 16px;
  font-family: inherit;
  color: var(--ink);
  width: 100%;
  transition: border-color 0.15s;
}

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

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--ink);
}

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

.form-error {
  font-size: 13px;
  color: var(--semantic-error);
  margin-top: 2px;
  display: none;
}

.form-success {
  background: var(--canvas-soft);
  border: 1px solid var(--hairline);
  border-radius: var(--rounded-md);
  padding: var(--spacing-base) var(--spacing-lg);
  font-size: 15px;
  color: var(--semantic-success);
  text-align: center;
  display: none;
  margin-top: var(--spacing-base);
}

.btn-submit {
  width: 100%;
  height: 44px;
  background: var(--primary);
  color: var(--on-primary);
  font-size: 14px;
  font-weight: 500;
  border: none;
  border-radius: var(--rounded-md);
  cursor: pointer;
  transition: background 0.15s;
}

.btn-submit:hover { background: var(--primary-active); }
.btn-submit:disabled { opacity: 0.7; cursor: not-allowed; }

.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: var(--spacing-xxl);
  margin-bottom: var(--spacing-xxl);
}

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

.footer-desc {
  font-size: 14px;
  line-height: 1.6;
  color: var(--body);
}

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

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

.footer-col ul li { margin-bottom: var(--spacing-xs); }

.footer-col ul li a {
  font-size: 14px;
  color: var(--body);
  transition: color 0.15s;
}

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

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

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

.footer-links-bottom a {
  font-size: 13px;
  color: var(--muted);
  transition: color 0.15s;
}

.footer-links-bottom 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: 200;
  padding: var(--spacing-base) 0;
}

.cookie-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-base);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-xl);
  flex-wrap: wrap;
}

.cookie-inner p { font-size: 14px; color: var(--body); }
.cookie-inner a { color: var(--primary); text-decoration: underline; }

.cookie-actions { display: flex; gap: var(--spacing-xs); flex-shrink: 0; }

.related-section {
  padding: var(--spacing-section) 0;
  border-top: 1px solid var(--hairline);
}

@media (max-width: 1024px) {
  .hero h1 { font-size: 56px; letter-spacing: -1.5px; }
  .card-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .main-nav {
    display: none;
    flex-direction: column;
    gap: 0;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--canvas);
    border-bottom: 1px solid var(--hairline);
    padding: var(--spacing-base) 0;
  }

  .main-nav.open { display: flex; }

  .main-nav .nav-link {
    padding: var(--spacing-sm) var(--spacing-base);
    width: 100%;
    border-bottom: 1px solid var(--hairline-soft);
  }

  .nav-toggle { display: flex; }

  .site-header { position: relative; }

  .nav-inner { position: relative; }

  .hero h1 { font-size: 36px; letter-spacing: -1px; }
  .section-title { font-size: 28px; }
  .article-hero h1 { font-size: 32px; }
  .card-grid { grid-template-columns: 1fr; }
  .card-grid-2 { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: var(--spacing-xl); }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 480px) {
  .hero h1 { font-size: 28px; }
  .footer-grid { grid-template-columns: 1fr; }
  .article-img-feature { height: 220px; }
}