*, *::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;
  --r-xs: 4px;
  --r-sm: 6px;
  --r-md: 8px;
  --r-lg: 12px;
  --r-xl: 16px;
  --r-pill: 9999px;
  --font-body: 'Inter', system-ui, 'Helvetica Neue', Helvetica, Arial, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

html { scroll-behavior: smooth; }

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

a { color: inherit; text-decoration: none; }
a:hover { color: var(--ink); }
img { max-width: 100%; height: auto; display: block; }
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);
  height: 64px;
  position: sticky;
  top: 0;
  z-index: 100;
}

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

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

.main-nav {
  display: flex;
  align-items: center;
  gap: 28px;
}

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

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

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

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

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

.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);
  padding: 4px 10px;
  border-radius: var(--r-pill);
  margin-bottom: 24px;
}

.hero-title {
  font-size: 56px;
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -1.5px;
  color: var(--ink);
  max-width: 700px;
  margin-bottom: 20px;
}

.hero-sub {
  font-size: 18px;
  color: var(--body);
  max-width: 560px;
  margin-bottom: 40px;
  line-height: 1.5;
}

.hero-image-wrap {
  margin-top: 56px;
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--hairline);
  background: var(--surface-card);
}

.hero-image-wrap img {
  width: 100%;
  max-height: 420px;
  object-fit: cover;
}

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

.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-sub {
  font-size: 16px;
  color: var(--body);
  max-width: 560px;
  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(--r-lg);
  padding: 24px;
  transition: border-color 0.15s;
}

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

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

.card-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
  line-height: 1.4;
  margin-bottom: 10px;
}

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

.card-text {
  font-size: 14px;
  color: var(--body);
  line-height: 1.5;
  margin-bottom: 20px;
}

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

.card-image img {
  width: 100%;
  height: 180px;
  object-fit: cover;
}

.card-footer {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--muted);
}

.card-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--ink);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

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

.article-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 48px;
  align-items: start;
}

.article-main {}

.article-header { margin-bottom: 40px; }

.article-label {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.88px;
  text-transform: uppercase;
  color: var(--muted);
  background: var(--surface-strong);
  padding: 4px 10px;
  border-radius: var(--r-pill);
  margin-bottom: 16px;
}

.article-title {
  font-size: 40px;
  font-weight: 400;
  letter-spacing: -1px;
  color: var(--ink);
  line-height: 1.15;
  margin-bottom: 16px;
}

.article-meta {
  font-size: 13px;
  color: var(--muted);
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

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

.article-image img { width: 100%; max-height: 400px; object-fit: cover; }

.article-image figcaption {
  font-size: 13px;
  color: var(--muted);
  padding: 8px 16px;
  background: var(--canvas-soft);
}

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

.article-body h3 {
  font-size: 20px;
  font-weight: 600;
  color: var(--ink);
  margin: 28px 0 12px;
  line-height: 1.4;
}

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

.article-body ul, .article-body ol {
  padding-left: 20px;
  margin-bottom: 16px;
}

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

.article-body li {
  font-size: 16px;
  color: var(--body);
  line-height: 1.6;
  margin-bottom: 6px;
}

.article-body a { color: var(--ink); text-decoration: underline; text-underline-offset: 2px; }
.article-body a:hover { color: var(--primary); }

.highlight-box {
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-left: 3px solid var(--primary);
  border-radius: var(--r-md);
  padding: 20px 24px;
  margin: 24px 0;
}

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

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

.data-box-title {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 12px;
}

.data-list { display: flex; flex-direction: column; gap: 8px; }

.data-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 12px;
  background: var(--surface-card);
  border-radius: var(--r-sm);
  border: 1px solid var(--hairline-soft);
  font-size: 14px;
}

.data-item-label { color: var(--body); }
.data-item-value { font-weight: 600; color: var(--ink); font-family: var(--font-mono); font-size: 13px; }

.article-sidebar {}

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

.sidebar-title {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 16px;
}

.sidebar-links { display: flex; flex-direction: column; gap: 10px; }

.sidebar-link {
  font-size: 14px;
  color: var(--body);
  line-height: 1.4;
  display: block;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--hairline-soft);
}

.sidebar-link:last-child { border-bottom: none; padding-bottom: 0; }
.sidebar-link:hover { color: var(--ink); }

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

.page-title {
  font-size: 40px;
  font-weight: 400;
  letter-spacing: -1px;
  color: var(--ink);
  margin-bottom: 12px;
}

.page-sub {
  font-size: 16px;
  color: var(--body);
  max-width: 560px;
}

.page-content {
  padding: 48px 0 80px;
}

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

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

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

.page-content ul, .page-content ol {
  margin-bottom: 16px;
  padding-left: 20px;
}

.page-content ul { list-style: disc; }
.page-content ol { list-style: decimal; }

.page-content li {
  font-size: 16px;
  color: var(--body);
  line-height: 1.6;
  margin-bottom: 6px;
}

.page-content a { color: var(--ink); text-decoration: underline; text-underline-offset: 2px; }
.page-content a:hover { color: var(--primary); }

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

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

.contact-info-title {
  font-size: 26px;
  font-weight: 400;
  letter-spacing: -0.325px;
  color: var(--ink);
  margin-bottom: 16px;
}

.contact-info-text {
  font-size: 16px;
  color: var(--body);
  line-height: 1.6;
  margin-bottom: 24px;
}

.contact-detail {
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 14px;
  color: var(--body);
}

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

.form-group { margin-bottom: 20px; }

.form-label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  color: var(--ink);
  margin-bottom: 6px;
}

.form-input, .form-textarea {
  width: 100%;
  font-family: var(--font-body);
  font-size: 16px;
  color: var(--ink);
  background: var(--surface-card);
  border: 1px solid var(--hairline-strong);
  border-radius: var(--r-md);
  padding: 12px 16px;
  height: 44px;
  outline: none;
  transition: border-color 0.15s;
}

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

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

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

.form-error.visible { display: block; }

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

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

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

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

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

.form-spinner {
  width: 16px; height: 16px;
  border: 2px solid rgba(255,255,255,0.4);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  display: none;
}

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

.form-loading .form-spinner { display: block; }

.form-success {
  display: none;
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-left: 3px solid var(--success);
  border-radius: var(--r-md);
  padding: 16px 20px;
  font-size: 15px;
  color: var(--body-strong);
  margin-top: 16px;
}

.form-success.visible { display: block; }

.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--surface-card);
  border-top: 1px solid var(--hairline);
  padding: 20px 0;
  z-index: 999;
  display: none;
}

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

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

.cookie-text {
  font-size: 14px;
  color: var(--body);
  max-width: 600px;
}

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

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

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

.footer-desc {
  font-size: 14px;
  color: var(--body);
  line-height: 1.5;
}

.footer-heading {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  color: var(--muted);
  display: block;
  margin-bottom: 14px;
}

.footer-links { display: flex; flex-direction: column; gap: 8px; }

.footer-links a, .footer-links li {
  font-size: 14px;
  color: var(--body);
  line-height: 1.5;
}

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

.footer-bottom {
  border-top: 1px solid var(--hairline);
  padding: 20px 0;
}

.footer-bottom-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}

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

.breadcrumb {
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 24px;
  display: flex;
  gap: 6px;
  align-items: center;
  flex-wrap: wrap;
}

.breadcrumb a { color: var(--muted); }
.breadcrumb a:hover { color: var(--ink); }
.breadcrumb-sep { color: var(--muted-soft); }

.disclaimer {
  background: var(--canvas-soft);
  border: 1px solid var(--hairline-soft);
  border-radius: var(--r-md);
  padding: 16px 20px;
  font-size: 13px;
  color: var(--muted);
  margin: 32px 0;
  line-height: 1.5;
}

.related-articles { padding: 48px 0 80px; border-top: 1px solid var(--hairline); }

.schema-hidden { display: none; }

@media (max-width: 1024px) {
  .cards-grid { grid-template-columns: repeat(2, 1fr); }
  .article-layout { grid-template-columns: 1fr; }
  .article-sidebar { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
  .footer-inner { grid-template-columns: 1fr 1fr; gap: 32px; }
  .contact-grid { grid-template-columns: 1fr; gap: 40px; }
}

@media (max-width: 768px) {
  .hero-title { font-size: 36px; letter-spacing: -0.8px; }
  .section-title { font-size: 28px; }
  .article-title { font-size: 30px; }
  .page-title { font-size: 30px; }
  .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);
    flex-direction: column;
    padding: 16px 24px;
    gap: 0;
  }
  .main-nav.open { display: flex; }
  .nav-link { padding: 10px 0; border-bottom: 1px solid var(--hairline-soft); width: 100%; }
  .nav-link:last-child { border-bottom: none; }
  .cards-grid { grid-template-columns: 1fr; }
  .article-sidebar { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; gap: 24px; }
  .cookie-inner { flex-direction: column; align-items: flex-start; }
  .footer-bottom-inner { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 480px) {
  .hero-title { font-size: 28px; }
  .hero-sub { font-size: 16px; }
  .section { padding: 48px 0; }
}