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

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-inline: auto;
  padding-inline: 24px;
}

.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;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.site-logo {
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: -0.3px;
}
.site-logo span { color: var(--primary); }

.site-nav {
  display: flex;
  gap: 28px;
  align-items: center;
}
.site-nav a {
  font-size: 14px;
  font-weight: 500;
  color: var(--body);
  transition: color 0.15s;
}
.site-nav a:hover { color: var(--primary); }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--ink);
  border-radius: 2px;
  transition: transform 0.2s, opacity 0.2s;
}

.hero-band {
  padding: 80px 0 60px;
  border-bottom: 1px solid var(--hairline);
}
.hero-band .container { display: flex; flex-direction: column; gap: 20px; }
.hero-label {
  display: inline-block;
  background: var(--surface-strong);
  color: var(--ink);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.88px;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: var(--radius-pill);
}
.hero-band h1 {
  font-size: clamp(36px, 5vw, 72px);
  font-weight: 400;
  color: var(--ink);
  line-height: 1.1;
  letter-spacing: -2px;
  max-width: 820px;
}
.hero-band .hero-sub {
  font-size: 16px;
  color: var(--body);
  max-width: 600px;
  line-height: 1.6;
}
.hero-band .hero-meta {
  font-size: 13px;
  color: var(--muted);
}
.hero-img {
  margin-top: 40px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--hairline);
  max-height: 480px;
  object-fit: cover;
  width: 100%;
}

.section { padding: 80px 0; }
.section-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.88px;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 20px;
}
.section h2 {
  font-size: clamp(26px, 3vw, 36px);
  font-weight: 400;
  color: var(--ink);
  line-height: 1.2;
  letter-spacing: -0.72px;
  margin-bottom: 12px;
}
.section p.lead {
  font-size: 16px;
  color: var(--body);
  max-width: 640px;
  line-height: 1.6;
  margin-bottom: 48px;
}

.card-grid {
  display: grid;
  gap: 20px;
}
.card-grid--3 { grid-template-columns: repeat(3, 1fr); }
.card-grid--2 { grid-template-columns: repeat(2, 1fr); }

.feature-card {
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-lg);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.feature-card img {
  border-radius: var(--radius-md);
  width: 100%;
  height: 200px;
  object-fit: cover;
}
.feature-card h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
  line-height: 1.35;
}
.feature-card p {
  font-size: 14px;
  color: var(--body);
  line-height: 1.55;
  flex: 1;
}
.feature-card .card-meta {
  font-size: 13px;
  color: var(--muted);
}
.feature-card a.card-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--ink);
  border-top: 1px solid var(--hairline);
  padding-top: 12px;
  margin-top: auto;
}
.feature-card a.card-link:hover { color: var(--primary); }

.info-band {
  background: var(--surface-card);
  border-top: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
  padding: 80px 0;
}
.info-band .split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}
.info-band img {
  border-radius: var(--radius-lg);
  border: 1px solid var(--hairline);
  width: 100%;
  height: 340px;
  object-fit: cover;
}
.info-band h2 {
  font-size: clamp(24px, 2.5vw, 32px);
  font-weight: 400;
  color: var(--ink);
  line-height: 1.2;
  letter-spacing: -0.5px;
  margin-bottom: 16px;
}
.info-band p {
  font-size: 15px;
  color: var(--body);
  line-height: 1.65;
  margin-bottom: 14px;
}
.info-band ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 8px;
}
.info-band ul li {
  font-size: 14px;
  color: var(--body);
  padding-left: 18px;
  position: relative;
}
.info-band ul li::before {
  content: '—';
  position: absolute;
  left: 0;
  color: var(--muted);
}

article.article-body { padding: 60px 0 80px; }
.article-header { padding: 60px 0 40px; border-bottom: 1px solid var(--hairline); }
.article-header h1 {
  font-size: clamp(28px, 4vw, 52px);
  font-weight: 400;
  color: var(--ink);
  line-height: 1.1;
  letter-spacing: -1px;
  margin-bottom: 16px;
  max-width: 760px;
}
.article-header .art-meta {
  font-size: 13px;
  color: var(--muted);
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}
.article-content {
  max-width: 720px;
  margin: 0 auto;
}
.article-content h2 {
  font-size: 26px;
  font-weight: 400;
  color: var(--ink);
  letter-spacing: -0.325px;
  margin: 48px 0 16px;
}
.article-content h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
  margin: 32px 0 12px;
}
.article-content p {
  font-size: 16px;
  color: var(--body);
  line-height: 1.7;
  margin-bottom: 18px;
}
.article-content ul, .article-content ol {
  margin: 12px 0 20px 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.article-content li {
  font-size: 15px;
  color: var(--body);
  line-height: 1.6;
}
.article-content img {
  border-radius: var(--radius-lg);
  border: 1px solid var(--hairline);
  margin: 32px 0;
  width: 100%;
  max-height: 400px;
  object-fit: cover;
}
.article-content figcaption {
  font-size: 13px;
  color: var(--muted);
  margin-top: -24px;
  margin-bottom: 32px;
  text-align: center;
}
.article-content .note-box {
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-left: 3px solid var(--primary);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  margin: 28px 0;
  font-size: 14px;
  color: var(--body);
  line-height: 1.6;
}
.article-content a { color: var(--primary); }
.article-content a:hover { text-decoration: underline; }
.article-content .ref-link {
  font-size: 13px;
  color: var(--muted);
  border-top: 1px solid var(--hairline);
  margin-top: 48px;
  padding-top: 20px;
}

.related-section { padding: 60px 0 80px; border-top: 1px solid var(--hairline); }
.related-section h2 {
  font-size: 22px;
  font-weight: 400;
  color: var(--ink);
  letter-spacing: -0.11px;
  margin-bottom: 28px;
}

.page-hero { padding: 60px 0 40px; border-bottom: 1px solid var(--hairline); }
.page-hero h1 {
  font-size: clamp(26px, 3vw, 42px);
  font-weight: 400;
  color: var(--ink);
  letter-spacing: -0.72px;
  margin-bottom: 12px;
}
.page-hero p {
  font-size: 15px;
  color: var(--body);
  max-width: 580px;
  line-height: 1.6;
}
.page-content { max-width: 760px; padding: 48px 0 80px; }
.page-content h2 {
  font-size: 22px;
  font-weight: 400;
  color: var(--ink);
  margin: 40px 0 12px;
  letter-spacing: -0.11px;
}
.page-content p {
  font-size: 15px;
  color: var(--body);
  line-height: 1.7;
  margin-bottom: 14px;
}
.page-content ul {
  margin: 12px 0 18px 18px;
  display: flex;
  flex-direction: column;
  gap: 7px;
}
.page-content li { font-size: 14px; color: var(--body); line-height: 1.6; }
.page-content a { color: var(--primary); }

.contact-form-section { padding: 60px 0 80px; border-top: 1px solid var(--hairline); }
.contact-form-section h2 {
  font-size: 26px;
  font-weight: 400;
  color: var(--ink);
  letter-spacing: -0.325px;
  margin-bottom: 28px;
}
.contact-form {
  max-width: 520px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group label {
  font-size: 13px;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: 0.1px;
}
.form-group input,
.form-group textarea {
  background: var(--surface-card);
  border: 1px solid var(--hairline-strong);
  border-radius: var(--radius-md);
  padding: 12px 16px;
  font-family: var(--font-sans);
  font-size: 15px;
  color: var(--ink);
  transition: border-color 0.15s;
  outline: none;
  height: 44px;
}
.form-group textarea { height: auto; min-height: 110px; resize: vertical; }
.form-group input:focus,
.form-group textarea:focus { border-color: var(--primary); }
.form-group .field-error {
  font-size: 12px;
  color: var(--error);
  display: none;
}
.form-group.has-error .field-error { display: block; }
.form-group.has-error input,
.form-group.has-error textarea { border-color: var(--error); }

.btn-primary {
  background: var(--primary);
  color: var(--on-primary);
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 500;
  border: none;
  border-radius: var(--radius-md);
  padding: 10px 18px;
  height: 40px;
  cursor: pointer;
  transition: background 0.15s;
  align-self: flex-start;
}
.btn-primary:hover { background: var(--primary-active); }
.btn-primary:disabled { opacity: 0.6; cursor: not-allowed; }

.form-message {
  padding: 12px 16px;
  border-radius: var(--radius-md);
  font-size: 14px;
  display: none;
}
.form-message.success {
  background: #e6f5ef;
  color: var(--success);
  border: 1px solid #b2dccb;
  display: block;
}

.site-footer {
  background: var(--canvas);
  border-top: 1px solid var(--hairline);
  padding: 64px 0 0;
}
.footer-inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 48px;
}
.footer-brand {
  display: block;
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 10px;
}
.footer-col p {
  font-size: 14px;
  color: var(--body);
  line-height: 1.6;
  max-width: 260px;
}
.footer-heading {
  display: block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.88px;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 14px;
}
.footer-col ul { list-style: none; display: flex; flex-direction: column; gap: 8px; }
.footer-col ul a {
  font-size: 14px;
  color: var(--body);
  transition: color 0.15s;
}
.footer-col ul a:hover { color: var(--primary); }

.footer-bottom {
  border-top: 1px solid var(--hairline);
  padding: 18px 0;
}
.footer-bottom .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13px;
  color: var(--muted);
}
.footer-bottom a {
  color: var(--muted);
  font-size: 13px;
}
.footer-bottom a:hover { color: var(--primary); }

.cookie-banner {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--ink);
  color: var(--canvas);
  border-radius: var(--radius-lg);
  padding: 16px 24px;
  max-width: 640px;
  width: calc(100% - 32px);
  z-index: 9999;
  display: flex;
  gap: 20px;
  align-items: center;
  flex-wrap: wrap;
  box-shadow: 0 4px 24px rgba(38,37,30,0.16);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s;
}
.cookie-banner.visible { opacity: 1; pointer-events: auto; }
.cookie-banner p {
  flex: 1;
  font-size: 13px;
  line-height: 1.5;
  color: var(--canvas);
}
.cookie-banner p a { color: var(--primary); text-decoration: underline; }
.cookie-banner .cookie-btns { display: flex; gap: 10px; flex-shrink: 0; }
.cookie-btn {
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 500;
  border-radius: var(--radius-md);
  padding: 8px 14px;
  cursor: pointer;
  border: none;
  transition: opacity 0.15s;
}
.cookie-btn-accept { background: var(--primary); color: var(--on-primary); }
.cookie-btn-reject { background: transparent; color: var(--canvas-soft); border: 1px solid rgba(255,255,255,0.3); }
.cookie-btn:hover { opacity: 0.85; }

.breadcrumb {
  font-size: 13px;
  color: var(--muted);
  padding: 16px 0 0;
  display: flex;
  gap: 6px;
  align-items: center;
}
.breadcrumb a { color: var(--muted); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb span { color: var(--muted-soft); }

@media (max-width: 1024px) {
  .card-grid--3 { grid-template-columns: repeat(2, 1fr); }
  .footer-inner { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .nav-toggle { display: flex; }
  .site-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: 12px 0;
  }
  .site-nav.open { display: flex; }
  .site-nav a {
    padding: 10px 24px;
    width: 100%;
    border-bottom: 1px solid var(--hairline-soft);
  }
  .info-band .split { grid-template-columns: 1fr; }
  .card-grid--2,
  .card-grid--3 { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; gap: 28px; }
}

@media (max-width: 480px) {
  .hero-band { padding: 48px 0 40px; }
  .section { padding: 48px 0; }
  .article-header { padding: 40px 0 28px; }
}