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

:root {
  --canvas: #f7f7f4;
  --canvas-soft: #fafaf7;
  --surface-card: #ffffff;
  --surface-strong: #e6e5e0;
  --hairline: #e6e5e0;
  --hairline-soft: #efeee8;
  --hairline-strong: #cfcdc4;
  --ink: #26251e;
  --body: #5a5852;
  --body-strong: #26251e;
  --muted: #807d72;
  --muted-soft: #a09c92;
  --primary: #f54e00;
  --primary-active: #d04200;
  --on-primary: #ffffff;
  --semantic-success: #1f8a65;
  --semantic-error: #cf2d56;
  --radius-xs: 4px;
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-pill: 9999px;
}

html { 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; }
ul { list-style: none; }

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

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

.site-nav {
  display: flex;
  align-items: center;
  height: 64px;
  gap: 32px;
}

.site-logo {
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: -0.01em;
  flex-shrink: 0;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
}

.nav-links > li > a {
  font-size: 14px;
  font-weight: 500;
  color: var(--body);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  transition: color 0.15s, background 0.15s;
  display: block;
}

.nav-links > li > a:hover {
  color: var(--ink);
  background: var(--surface-strong);
}

.nav-dropdown { position: relative; }

.dropdown-menu {
  display: none;
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-lg);
  padding: 8px;
  min-width: 240px;
  box-shadow: 0 4px 16px rgba(38,37,30,0.08);
}

.nav-dropdown:hover .dropdown-menu,
.nav-dropdown:focus-within .dropdown-menu { display: block; }

.dropdown-menu li a {
  font-size: 14px;
  color: var(--body);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  display: block;
  transition: color 0.15s, background 0.15s;
}

.dropdown-menu li a:hover {
  color: var(--ink);
  background: var(--canvas);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  margin-left: auto;
}

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

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

.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.hero-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.88px;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 20px;
  display: inline-block;
}

.hero h1 {
  font-size: 48px;
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -1.2px;
  color: var(--ink);
  margin-bottom: 20px;
}

.hero-sub {
  font-size: 18px;
  color: var(--body);
  line-height: 1.55;
  margin-bottom: 32px;
}

.hero-img {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--hairline);
  aspect-ratio: 4/3;
  background: var(--surface-strong);
}

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

.section { padding: 80px 0; }
.section + .section { border-top: 1px solid var(--hairline-soft); }

.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;
  color: var(--body);
  max-width: 600px;
  line-height: 1.6;
  margin-bottom: 48px;
}

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

.card {
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-lg);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: border-color 0.15s;
}

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

.card-img {
  border-radius: var(--radius-md);
  overflow: hidden;
  margin: -24px -24px 0;
  aspect-ratio: 16/9;
  background: var(--surface-strong);
}

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

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

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

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

.card-text {
  font-size: 14px;
  color: var(--body);
  line-height: 1.55;
  flex: 1;
}

.card-meta {
  font-size: 13px;
  color: var(--muted);
  padding-top: 12px;
  border-top: 1px solid var(--hairline-soft);
}

.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: 32px 28px;
}

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

.info-cell-label {
  font-size: 14px;
  color: var(--body);
  line-height: 1.4;
}

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

.two-col-img {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--hairline);
  aspect-ratio: 4/3;
  background: var(--surface-strong);
}

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

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

h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 12px;
  line-height: 1.4;
}

p { margin-bottom: 16px; }
p:last-child { margin-bottom: 0; }

.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(--radius-md);
  border: none;
  cursor: pointer;
  transition: background 0.15s;
  line-height: 20px;
  text-decoration: none;
}

.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(--radius-md);
  border: 1px solid var(--hairline-strong);
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
  line-height: 18px;
  text-decoration: none;
}

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

.badge {
  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);
}

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

.article-hero-inner {
  max-width: 800px;
}

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

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

.article-h1 {
  font-size: 42px;
  font-weight: 400;
  letter-spacing: -1px;
  color: var(--ink);
  line-height: 1.1;
  margin-bottom: 20px;
}

.article-lede {
  font-size: 18px;
  color: var(--body);
  line-height: 1.6;
  letter-spacing: 0.08px;
}

.article-layout {
  padding: 48px 0 80px;
}

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

.article-body { max-width: 680px; }

.article-body h2 {
  margin-top: 40px;
  margin-bottom: 16px;
  font-size: 26px;
  font-weight: 400;
  letter-spacing: -0.325px;
  color: var(--ink);
}

.article-body h3 {
  margin-top: 28px;
  margin-bottom: 10px;
}

.article-body p { margin-bottom: 20px; color: var(--body); font-size: 16px; line-height: 1.65; }

.article-body ul,
.article-body ol {
  margin: 0 0 20px 20px;
  color: var(--body);
  font-size: 16px;
  line-height: 1.65;
}

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

.article-body li { margin-bottom: 8px; }

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

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

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

.code-block {
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-lg);
  padding: 20px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  color: var(--ink);
  line-height: 1.5;
  overflow-x: auto;
  margin: 24px 0;
}

.article-sidebar {
  position: sticky;
  top: 88px;
}

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

.sidebar-widget-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 + li { margin-top: 10px; }
.sidebar-toc a {
  font-size: 14px;
  color: var(--body);
  transition: color 0.15s;
  line-height: 1.4;
  display: block;
}
.sidebar-toc a:hover { color: var(--ink); }

.sidebar-links { list-style: none; }
.sidebar-links li + li { margin-top: 10px; }
.sidebar-links a {
  font-size: 14px;
  color: var(--body);
  transition: color 0.15s;
  display: block;
  line-height: 1.4;
}
.sidebar-links a:hover { color: var(--ink); }

.data-table-wrap {
  overflow-x: auto;
  margin: 24px 0;
  border-radius: var(--radius-lg);
  border: 1px solid var(--hairline);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  background: var(--surface-card);
}

.data-table th {
  background: var(--canvas);
  padding: 12px 16px;
  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);
}

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

.data-table tr:last-child td { border-bottom: none; }
.data-table tr:hover td { background: var(--canvas-soft); }

.contact-section { padding: 80px 0; }

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

.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: var(--radius-md);
  padding: 12px 16px;
  height: 44px;
  font-size: 16px;
  font-family: inherit;
  color: var(--ink);
  transition: border-color 0.15s, box-shadow 0.15s;
  outline: none;
}

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

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--ink);
  box-shadow: 0 0 0 3px rgba(38,37,30,0.08);
}

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

.form-error {
  font-size: 13px;
  color: var(--semantic-error);
  margin-top: 4px;
  display: none;
}

.form-submit-wrap { margin-top: 8px; }

#form-status {
  margin-top: 16px;
  font-size: 15px;
  padding: 12px 16px;
  border-radius: var(--radius-md);
  display: none;
}

#form-status.success {
  background: #e8f5f0;
  color: var(--semantic-success);
  border: 1px solid #b8ddd0;
  display: block;
}

#form-status.error {
  background: #fde8ec;
  color: var(--semantic-error);
  border: 1px solid #f4b8c6;
  display: block;
}

.contact-info p {
  font-size: 15px;
  color: var(--body);
  margin-bottom: 12px;
}

.contact-info a {
  color: var(--ink);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.page-hero {
  padding: 64px 0 48px;
  border-bottom: 1px solid var(--hairline);
  max-width: 700px;
}

.page-body {
  padding: 48px 0 80px;
  max-width: 700px;
}

.page-body h2 {
  margin-top: 40px;
  margin-bottom: 14px;
}

.page-body h3 { margin-top: 28px; margin-bottom: 10px; }
.page-body p { margin-bottom: 18px; font-size: 16px; line-height: 1.65; color: var(--body); }
.page-body ul { list-style: disc; margin: 0 0 18px 20px; color: var(--body); line-height: 1.65; }
.page-body li { margin-bottom: 6px; }

.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: 40px;
  margin-bottom: 48px;
}

.footer-brand {
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 10px;
}

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

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

.site-footer ul { list-style: none; }
.site-footer ul li + li { margin-top: 10px; }

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

.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;
  gap: 16px;
  flex-wrap: wrap;
}

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

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

.footer-links a {
  color: var(--muted);
  transition: color 0.15s;
}

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

.cookie-banner {
  position: fixed;
  bottom: 24px;
  left: 24px;
  right: 24px;
  max-width: 560px;
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-lg);
  padding: 20px 24px;
  box-shadow: 0 8px 32px rgba(38,37,30,0.12);
  z-index: 999;
  display: none;
}

.cookie-banner.show { display: block; }

.cookie-inner p {
  font-size: 14px;
  color: var(--body);
  margin-bottom: 16px;
}

.cookie-inner a {
  color: var(--ink);
  text-decoration: underline;
  text-underline-offset: 2px;
}

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

.disclaimer-bar {
  background: var(--canvas-soft);
  border-top: 1px solid var(--hairline-soft);
  padding: 12px 0;
  text-align: center;
  font-size: 13px;
  color: var(--muted);
}

@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; gap: 40px; }
  .hero h1 { font-size: 40px; }
  .cards-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .article-layout-inner { grid-template-columns: 1fr; }
  .article-sidebar { position: static; }
  .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .info-grid { grid-template-columns: 1fr 1fr; }
  .two-col { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .nav-toggle { display: flex; }
  .nav-links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--surface-card);
    border-bottom: 1px solid var(--hairline);
    flex-direction: column;
    align-items: stretch;
    padding: 12px;
    gap: 2px;
  }
  .nav-links.open { display: flex; }
  .nav-links > li > a { padding: 10px 12px; }
  .nav-dropdown .dropdown-menu {
    position: static;
    display: block;
    box-shadow: none;
    border: none;
    border-radius: 0;
    padding: 0 0 0 16px;
  }
  .section-title { font-size: 28px; }
  .hero h1 { font-size: 32px; }
  .article-h1 { font-size: 30px; }
  .cards-grid { 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; }
}

@media (max-width: 640px) {
  .hero { padding: 48px 0; }
  .section { padding: 48px 0; }
}