: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: 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 var(--spacing-lg);
}

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

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

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

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--spacing-xl);
}

.nav-links a {
  font-size: 14px;
  font-weight: 500;
  color: var(--body);
  line-height: 1.4;
  transition: color 0.15s ease;
}

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

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

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

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

.hero-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-section);
  align-items: center;
}

.hero-label {
  display: inline-block;
  background-color: var(--surface-strong);
  color: var(--ink);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.88px;
  text-transform: uppercase;
  line-height: 1.4;
  padding: 4px 10px;
  border-radius: var(--rounded-pill);
  margin-bottom: var(--spacing-lg);
}

.hero h1 {
  font-family: 'Inter', sans-serif;
  font-size: 52px;
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -1.5px;
  color: var(--ink);
  margin-bottom: var(--spacing-lg);
}

.hero-desc {
  font-size: 16px;
  color: var(--body);
  line-height: 1.5;
  max-width: 480px;
  margin-bottom: var(--spacing-xl);
}

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

.hero-image {
  border-radius: var(--rounded-lg);
  border: 1px solid var(--hairline);
  overflow: hidden;
  background-color: var(--surface-card);
}

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

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

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

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

.section-subtitle {
  font-size: 16px;
  color: var(--body);
  line-height: 1.5;
  max-width: 600px;
  margin-bottom: var(--spacing-xxl);
}

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

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

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

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

.article-card-body {
  padding: var(--spacing-lg);
}

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

.article-card-title {
  font-family: 'Inter', sans-serif;
  font-size: 18px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--ink);
  margin-bottom: var(--spacing-sm);
}

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

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

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

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

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

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

.tip-number {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.88px;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: var(--spacing-sm);
}

.tip-title {
  font-family: 'Inter', sans-serif;
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
  line-height: 1.4;
  margin-bottom: var(--spacing-sm);
}

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

.contact-section {
  padding: var(--spacing-section) 0;
}

.contact-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-section);
}

.contact-info h2 {
  font-family: 'Inter', sans-serif;
  font-size: 36px;
  font-weight: 400;
  line-height: 1.2;
  letter-spacing: -0.72px;
  color: var(--ink);
  margin-bottom: var(--spacing-lg);
}

.contact-info p {
  font-size: 16px;
  color: var(--body);
  line-height: 1.5;
  margin-bottom: var(--spacing-base);
}

.contact-detail {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-xl);
}

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

.contact-detail-item strong {
  color: var(--ink);
  display: block;
  font-weight: 600;
  margin-bottom: 2px;
}

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

.form-group {
  margin-bottom: var(--spacing-base);
}

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

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

.form-group textarea {
  height: auto;
  min-height: 100px;
  resize: vertical;
}

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

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

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

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background-color: var(--surface-card);
  color: var(--ink);
  font-size: 14px;
  font-weight: 500;
  font-family: inherit;
  padding: 10px 18px;
  height: 40px;
  border-radius: var(--rounded-md);
  border: 1px solid var(--hairline-strong);
  cursor: pointer;
  transition: border-color 0.15s ease;
  text-decoration: none;
}

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

.btn-submit {
  width: 100%;
  height: 44px;
}

.form-message {
  display: none;
  padding: var(--spacing-sm) var(--spacing-base);
  border-radius: var(--rounded-md);
  font-size: 14px;
  margin-top: var(--spacing-sm);
}

.form-message.success {
  background-color: #eaf6f1;
  color: var(--semantic-success);
  border: 1px solid #b8e4d4;
}

.form-message.show {
  display: block;
}

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

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xxl);
}

.footer-logo {
  font-family: 'Inter', sans-serif;
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: var(--spacing-sm);
}

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

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

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

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

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

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

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

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

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

.cookie-banner {
  display: none;
  position: fixed;
  bottom: var(--spacing-lg);
  left: var(--spacing-lg);
  right: var(--spacing-lg);
  max-width: 640px;
  background-color: var(--surface-card);
  border: 1px solid var(--hairline-strong);
  border-radius: var(--rounded-lg);
  padding: var(--spacing-lg);
  z-index: 999;
  box-shadow: 0 4px 24px rgba(38,37,30,0.08);
}

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

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

.cookie-inner p a {
  color: var(--primary);
}

.cookie-actions {
  display: flex;
  gap: var(--spacing-sm);
}

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

.page-header-inner {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

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

.page-header h1 {
  font-family: 'Inter', sans-serif;
  font-size: 46px;
  font-weight: 400;
  line-height: 1.15;
  letter-spacing: -1.2px;
  color: var(--ink);
  margin-bottom: var(--spacing-base);
}

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

.article-body {
  max-width: 800px;
  margin: 0 auto;
  padding: var(--spacing-section) var(--spacing-lg);
}

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

.article-body h2 {
  font-family: 'Inter', sans-serif;
  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-family: 'Inter', sans-serif;
  font-size: 20px;
  font-weight: 600;
  line-height: 1.3;
  color: var(--ink);
  margin-top: var(--spacing-xl);
  margin-bottom: var(--spacing-sm);
}

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

.article-body ul,
.article-body ol {
  padding-left: var(--spacing-lg);
  margin-bottom: var(--spacing-base);
}

.article-body li {
  font-size: 16px;
  color: var(--body);
  line-height: 1.6;
  margin-bottom: var(--spacing-xs);
  list-style: disc;
}

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

.article-body strong {
  color: var(--ink);
  font-weight: 600;
}

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

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

.article-note {
  background-color: var(--surface-card);
  border: 1px solid var(--hairline);
  border-left: 3px solid var(--primary);
  border-radius: var(--rounded-md);
  padding: var(--spacing-base) var(--spacing-lg);
  margin: var(--spacing-xl) 0;
}

.article-note p {
  margin-bottom: 0;
  font-size: 14px;
  color: var(--body);
}

.article-img-block {
  margin: var(--spacing-xl) 0;
}

.article-img-block img {
  width: 100%;
  border-radius: var(--rounded-lg);
  border: 1px solid var(--hairline);
}

.article-img-block figcaption {
  font-size: 13px;
  color: var(--muted);
  margin-top: var(--spacing-xs);
  line-height: 1.4;
}

.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
  margin-top: var(--spacing-xxl);
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--hairline);
}

.article-tag {
  background-color: 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(--rounded-pill);
}

.related-articles {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg) var(--spacing-section);
}

.related-articles h3 {
  font-family: 'Inter', sans-serif;
  font-size: 22px;
  font-weight: 400;
  letter-spacing: -0.11px;
  color: var(--ink);
  margin-bottom: var(--spacing-lg);
  padding-top: var(--spacing-xxl);
  border-top: 1px solid var(--hairline);
}

.related-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-base);
}

.related-card {
  background-color: var(--surface-card);
  border: 1px solid var(--hairline);
  border-radius: var(--rounded-lg);
  padding: var(--spacing-base);
  transition: border-color 0.15s ease;
}

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

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

.related-card-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
  line-height: 1.4;
}

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

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

.page-content {
  max-width: 800px;
  margin: 0 auto;
  padding: var(--spacing-section) var(--spacing-lg);
}

.page-content h2 {
  font-family: 'Inter', sans-serif;
  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);
}

.page-content h3 {
  font-family: 'Inter', sans-serif;
  font-size: 20px;
  font-weight: 600;
  color: var(--ink);
  margin-top: var(--spacing-xl);
  margin-bottom: var(--spacing-sm);
}

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

.page-content ul,
.page-content ol {
  padding-left: var(--spacing-lg);
  margin-bottom: var(--spacing-base);
}

.page-content li {
  font-size: 16px;
  color: var(--body);
  line-height: 1.6;
  margin-bottom: var(--spacing-xs);
  list-style: disc;
}

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

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

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

.disclaimer-box {
  background-color: var(--canvas-soft);
  border: 1px solid var(--hairline);
  border-radius: var(--rounded-md);
  padding: var(--spacing-base) var(--spacing-lg);
  margin: var(--spacing-xl) 0;
}

.disclaimer-box p {
  font-size: 14px;
  color: var(--muted);
  margin-bottom: 0;
}

@media (max-width: 1024px) {
  .hero h1 {
    font-size: 40px;
  }

  .articles-grid {
    grid-template-columns: 1fr 1fr;
  }

  .tips-grid {
    grid-template-columns: 1fr 1fr;
  }

  .footer-container {
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xxl);
  }
}

@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background-color: var(--canvas);
    border-bottom: 1px solid var(--hairline);
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: var(--spacing-base) var(--spacing-lg);
  }

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

  .nav-links li {
    width: 100%;
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--hairline-soft);
  }

  .nav-links li:last-child {
    border-bottom: none;
  }

  .hero-inner {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
  }

  .hero h1 {
    font-size: 32px;
    letter-spacing: -0.8px;
  }

  .section-title {
    font-size: 28px;
  }

  .articles-grid {
    grid-template-columns: 1fr;
  }

  .tips-grid {
    grid-template-columns: 1fr;
  }

  .contact-inner {
    grid-template-columns: 1fr;
    gap: var(--spacing-xxl);
  }

  .footer-container {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }

  .page-header h1 {
    font-size: 32px;
  }

  .related-grid {
    grid-template-columns: 1fr;
  }

  .cookie-banner {
    bottom: var(--spacing-sm);
    left: var(--spacing-sm);
    right: var(--spacing-sm);
  }
}

@media (max-width: 640px) {
  .hero {
    padding: var(--spacing-xxl) 0;
  }

  .section {
    padding: var(--spacing-xxl) 0;
  }

  .article-hero-img {
    height: 260px;
  }
}