:root {
  --canvas: #f7f7f4;
  --canvas-soft: #fafaf7;
  --surface-card: #ffffff;
  --surface-strong: #e6e5e0;
  --primary: #f54e00;
  --primary-active: #d04200;
  --hairline: #e6e5e0;
  --hairline-soft: #efeee8;
  --hairline-strong: #cfcdc4;
  --ink: #26251e;
  --body: #5a5852;
  --muted: #807d72;
  --muted-soft: #a09c92;
  --on-primary: #ffffff;
  --success: #1f8a65;
  --error: #cf2d56;
  --font-sans: 'Inter', system-ui, 'Helvetica Neue', Helvetica, Arial, sans-serif;
  --font-mono: 'JetBrains Mono', 'Courier New', monospace;
}

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

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

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

a { color: var(--ink); text-decoration: none; }
a:hover { color: var(--primary); }
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; }

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

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

.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: var(--font-sans);
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: -0.3px;
}

.nav-links {
  display: flex;
  gap: 32px;
  align-items: center;
}

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

.nav-links li a:hover { 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 {
  padding: 80px 0;
  background: var(--canvas);
  border-bottom: 1px solid var(--hairline-soft);
}

.hero-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.hero-label {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.88px;
  text-transform: uppercase;
  color: var(--muted);
  background: var(--surface-strong);
  border-radius: 9999px;
  padding: 4px 10px;
  margin-bottom: 20px;
}

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

.hero-desc {
  font-size: 16px;
  line-height: 1.6;
  color: var(--body);
  margin-bottom: 32px;
  max-width: 480px;
}

.hero-img {
  border-radius: 12px;
  border: 1px solid var(--hairline);
  overflow: hidden;
  background: var(--surface-card);
}

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

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

.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;
  letter-spacing: -0.72px;
  color: var(--ink);
  line-height: 1.2;
  margin-bottom: 16px;
}

.section-desc {
  font-size: 16px;
  line-height: 1.6;
  color: var(--body);
  max-width: 600px;
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
}

.article-card {
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-radius: 12px;
  overflow: hidden;
  transition: border-color 0.15s;
}

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

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

.article-card-body {
  padding: 24px;
}

.article-card-tag {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.88px;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 10px;
  display: block;
}

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

.article-card-desc {
  font-size: 14px;
  line-height: 1.55;
  color: var(--body);
  margin-bottom: 16px;
}

.article-card-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--ink);
  border-bottom: 1px solid var(--hairline-strong);
  padding-bottom: 2px;
  display: inline-block;
}

.article-card-link:hover { color: var(--primary); border-color: var(--primary); }

.info-band {
  background: var(--surface-card);
  border-top: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
}

.info-item {
  padding: 48px 40px;
  border-right: 1px solid var(--hairline);
}

.info-item:last-child { border-right: none; }

.info-item-number {
  font-size: 36px;
  font-weight: 400;
  letter-spacing: -0.72px;
  color: var(--ink);
  margin-bottom: 8px;
  font-family: var(--font-sans);
}

.info-item-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 8px;
}

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

.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}

.two-col-img {
  border-radius: 12px;
  border: 1px solid var(--hairline);
  overflow: hidden;
}

.two-col-img img {
  width: 100%;
  height: 320px;
  object-fit: cover;
}

.two-col-content {}

.two-col-content h2 {
  font-size: 36px;
  font-weight: 400;
  letter-spacing: -0.72px;
  color: var(--ink);
  line-height: 1.2;
  margin-bottom: 16px;
}

.two-col-content p {
  font-size: 16px;
  line-height: 1.6;
  color: var(--body);
  margin-bottom: 16px;
}

.two-col-content ul {
  list-style: disc;
  padding-left: 20px;
  margin-top: 16px;
}

.two-col-content ul li {
  font-size: 15px;
  line-height: 1.6;
  color: var(--body);
  margin-bottom: 8px;
}

.contact-section {
  background: var(--surface-card);
  border-top: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
  padding: 80px 0;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 64px;
  align-items: start;
}

.contact-info h2 {
  font-size: 36px;
  font-weight: 400;
  letter-spacing: -0.72px;
  color: var(--ink);
  margin-bottom: 16px;
}

.contact-info p {
  font-size: 15px;
  line-height: 1.6;
  color: var(--body);
  margin-bottom: 24px;
}

.contact-detail {
  font-size: 14px;
  color: var(--body);
  margin-bottom: 6px;
}

.contact-detail strong {
  color: var(--ink);
  font-weight: 600;
}

.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);
  border: 1px solid var(--hairline-strong);
  border-radius: 8px;
  padding: 12px 16px;
  font-family: var(--font-sans);
  font-size: 15px;
  color: var(--ink);
  outline: none;
  transition: border-color 0.15s;
  height: 44px;
}

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

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

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--muted-soft);
}

.btn-primary {
  background: var(--primary);
  color: var(--on-primary);
  border: none;
  border-radius: 8px;
  padding: 10px 18px;
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 500;
  height: 40px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s;
}

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

.btn-secondary {
  background: var(--surface-card);
  color: var(--ink);
  border: 1px solid var(--hairline-strong);
  border-radius: 8px;
  padding: 10px 18px;
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 500;
  height: 40px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: border-color 0.15s;
}

.btn-secondary:hover { border-color: var(--ink); }

.form-submit-wrap {
  display: flex;
  align-items: center;
  gap: 16px;
}

.form-message {
  font-size: 14px;
  font-weight: 500;
  display: none;
}

.form-message.success { color: var(--success); }
.form-message.error-msg { color: var(--error); }

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

.article-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
}

.article-tag {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.88px;
  text-transform: uppercase;
  color: var(--muted);
  background: var(--surface-strong);
  border-radius: 9999px;
  padding: 4px 10px;
}

.article-date {
  font-size: 13px;
  color: var(--muted);
}

.article-title {
  font-size: 46px;
  font-weight: 400;
  letter-spacing: -1.2px;
  color: var(--ink);
  line-height: 1.15;
  margin-bottom: 20px;
  max-width: 800px;
}

.article-subtitle {
  font-size: 18px;
  line-height: 1.55;
  color: var(--body);
  max-width: 680px;
  margin-bottom: 32px;
}

.article-cover {
  margin-top: 40px;
  border-radius: 12px;
  border: 1px solid var(--hairline);
  overflow: hidden;
}

.article-cover img {
  width: 100%;
  height: 420px;
  object-fit: cover;
}

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

.article-layout {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 64px;
  padding: 64px 0 80px;
  align-items: start;
}

.article-body h2 {
  font-size: 26px;
  font-weight: 400;
  letter-spacing: -0.325px;
  color: var(--ink);
  line-height: 1.25;
  margin: 48px 0 16px;
}

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

.article-body h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
  line-height: 1.4;
  margin: 32px 0 12px;
}

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

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

.article-body ul { list-style: disc; }
.article-body ol { list-style: decimal; }

.article-body li {
  font-size: 15px;
  line-height: 1.65;
  color: var(--body);
  margin-bottom: 6px;
}

.article-body a {
  color: var(--ink);
  border-bottom: 1px solid var(--hairline-strong);
}

.article-body a:hover { color: var(--primary); border-color: var(--primary); }

.article-body figure {
  margin: 32px 0;
  border-radius: 12px;
  border: 1px solid var(--hairline);
  overflow: hidden;
}

.article-body figure img {
  width: 100%;
  height: 280px;
  object-fit: cover;
}

.article-body figcaption {
  font-size: 13px;
  color: var(--muted);
  padding: 10px 16px;
  border-top: 1px solid var(--hairline-soft);
  background: var(--canvas-soft);
}

.callout {
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-left: 3px solid var(--ink);
  border-radius: 8px;
  padding: 20px 24px;
  margin: 28px 0;
}

.callout p {
  font-size: 15px;
  line-height: 1.6;
  color: var(--body);
  margin: 0;
}

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

.data-table th {
  text-align: left;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.88px;
  text-transform: uppercase;
  color: var(--muted);
  border-bottom: 1px solid var(--hairline-strong);
  padding: 10px 16px;
  background: var(--canvas-soft);
}

.data-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--hairline-soft);
  color: var(--body);
  line-height: 1.5;
}

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

.article-sidebar {
  position: sticky;
  top: 84px;
}

.sidebar-card {
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-radius: 12px;
  padding: 24px;
  margin-bottom: 20px;
}

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

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

.sidebar-card ul li a {
  font-size: 14px;
  color: var(--body);
  line-height: 1.45;
  border-bottom: 1px solid var(--hairline-soft);
  padding-bottom: 2px;
}

.sidebar-card ul li a:hover { color: var(--ink); border-color: var(--hairline-strong); }

.sidebar-external li a {
  font-size: 13px;
  color: var(--muted);
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.sidebar-external li a::after {
  content: '↗';
  font-size: 11px;
  color: var(--muted-soft);
}

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

.page-title {
  font-size: 46px;
  font-weight: 400;
  letter-spacing: -1.2px;
  color: var(--ink);
  line-height: 1.15;
  margin-bottom: 16px;
}

.page-subtitle {
  font-size: 18px;
  line-height: 1.55;
  color: var(--body);
  max-width: 560px;
}

.page-content {
  max-width: 760px;
  padding: 64px 0 80px;
}

.page-content h2 {
  font-size: 26px;
  font-weight: 400;
  letter-spacing: -0.325px;
  color: var(--ink);
  line-height: 1.25;
  margin: 40px 0 14px;
}

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

.page-content h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
  margin: 28px 0 10px;
}

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

.page-content ul {
  list-style: disc;
  padding-left: 24px;
  margin-bottom: 20px;
}

.page-content ul li {
  font-size: 15px;
  line-height: 1.65;
  color: var(--body);
  margin-bottom: 6px;
}

.page-content a {
  color: var(--ink);
  border-bottom: 1px solid var(--hairline-strong);
}

.page-content a:hover { color: var(--primary); border-color: var(--primary); }

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

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr 1.5fr;
  gap: 40px;
}

.footer-brand {
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
  display: block;
  margin-bottom: 10px;
  letter-spacing: -0.3px;
}

.footer-tagline {
  font-size: 14px;
  line-height: 1.55;
  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: 14px;
}

.footer-col ul li {
  margin-bottom: 8px;
}

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

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

.footer-contact {
  font-size: 14px;
  line-height: 1.65;
  color: var(--body);
}

.footer-contact a {
  color: var(--body);
  border-bottom: 1px solid var(--hairline);
}

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

.footer-bottom {
  max-width: 1200px;
  margin: 40px auto 0;
  padding: 24px 24px 0;
  border-top: 1px solid var(--hairline-soft);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}

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

.footer-bottom a {
  color: var(--muted);
  border-bottom: 1px solid var(--hairline-soft);
}

.footer-bottom a:hover { color: var(--body); }

.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--ink);
  color: var(--canvas);
  padding: 16px 24px;
  z-index: 999;
  display: none;
}

.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;
  line-height: 1.5;
  color: var(--canvas);
  flex: 1;
}

.cookie-inner a { color: var(--canvas); border-bottom: 1px solid rgba(247,247,244,0.4); }

.cookie-actions {
  display: flex;
  gap: 10px;
  flex-shrink: 0;
}

.cookie-actions .btn-primary {
  background: var(--canvas);
  color: var(--ink);
  border: none;
}

.cookie-actions .btn-primary:hover { background: var(--canvas-soft); color: var(--ink); }

.cookie-actions .btn-secondary {
  background: transparent;
  color: var(--canvas);
  border: 1px solid rgba(247,247,244,0.4);
}

.cookie-actions .btn-secondary:hover { border-color: var(--canvas); }

.breadcrumb {
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 20px;
}

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

.updated-date {
  font-size: 13px;
  color: var(--muted-soft);
  margin-top: 8px;
}

@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; gap: 40px; }
  .hero-title { font-size: 42px; }
  .articles-grid { grid-template-columns: 1fr 1fr; }
  .info-grid { grid-template-columns: 1fr; }
  .info-item { border-right: none; border-bottom: 1px solid var(--hairline); }
  .info-item:last-child { border-bottom: none; }
  .two-col { grid-template-columns: 1fr; gap: 32px; }
  .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .article-layout { grid-template-columns: 1fr; }
  .article-sidebar { position: static; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .nav-toggle { display: flex; }
  .nav-links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--canvas);
    flex-direction: column;
    gap: 0;
    border-bottom: 1px solid var(--hairline);
    padding: 8px 0;
  }
  .nav-links.open { display: flex; }
  .nav-links li a {
    display: block;
    padding: 12px 24px;
  }
  .hero { padding: 48px 0; }
  .hero-title { font-size: 32px; }
  .section { padding: 48px 0; }
  .section-title { font-size: 28px; }
  .articles-grid { grid-template-columns: 1fr; }
  .article-title { font-size: 32px; }
  .article-cover img { height: 240px; }
  .page-title { font-size: 32px; }
  .footer-inner { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
  .cookie-inner { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 480px) {
  .hero-title { font-size: 26px; }
  .container { padding: 0 16px; }
  .footer-inner { padding: 0 16px; }
}