/* ==========================================================================
   DANKE AIRPORT / DANKE机场 - 20世纪中叶航空海报设计规范
   Palette: Warm Sand #F4E7D3 | Sunset Orange #E8531F | Apricot #F2A65A | Espresso Brown #241A12
   Typography: Anton for Display / Archivo for Body & Buttons
   Strict Flat Shapes | No Gradients | No Shadows | Hairlines
   ========================================================================== */

:root {
  --sand: #F4E7D3;
  --orange: #E8531F;
  --apricot: #F2A65A;
  --espresso: #241A12;
  --hairline: 1px solid var(--espresso);
  --border-thick: 2px solid var(--espresso);
  --font-display: 'Anton', Impact, 'Arial Black', sans-serif;
  --font-body: 'Archivo', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

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

html {
  scroll-behavior: smooth;
  background-color: var(--sand);
  color: var(--espresso);
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  background-color: var(--sand);
  color: var(--espresso);
  line-height: 1.6;
  border: 12px solid var(--espresso);
  min-height: 100vh;
}

a {
  color: inherit;
  text-decoration: none;
}

.poster-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 32px;
}

/* Header */
header.site-header {
  border-bottom: var(--border-thick);
  background: var(--sand);
  padding: 22px 0;
}

.nav-wrap {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-family: var(--font-display);
  font-size: 2.2rem;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--espresso);
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo-dot {
  width: 18px;
  height: 18px;
  background: var(--orange);
}

/* Buttons */
.btn {
  font-family: var(--font-body);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 12px 24px;
  border-radius: 0;
  border: 2px solid var(--espresso);
  cursor: pointer;
  display: inline-block;
  text-align: center;
  font-size: 0.9rem;
}

.btn-espresso {
  background: var(--espresso);
  color: var(--sand);
}

.btn-espresso:hover {
  background: var(--orange);
  border-color: var(--orange);
  color: var(--sand);
}

.btn-outline {
  background: transparent;
  color: var(--espresso);
}

.btn-outline:hover {
  background: var(--espresso);
  color: var(--sand);
}

.subpage-hero {
  border-bottom: var(--border-thick);
  padding: 60px 0 40px;
}

.subpage-tag {
  font-size: 0.85rem;
  font-weight: 800;
  letter-spacing: 2px;
  text-transform: uppercase;
  background: var(--orange);
  color: var(--sand);
  padding: 4px 10px;
  display: inline-block;
  margin-bottom: 16px;
}

.subpage-h1 {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 6vw, 4.5rem);
  text-transform: uppercase;
  line-height: 0.95;
  margin-bottom: 16px;
}

.subpage-lead {
  font-size: 1.15rem;
  font-weight: 500;
  max-width: 800px;
}

.subpage-content {
  padding: 60px 0 90px;
}

.poster-article {
  border: var(--border-thick);
  background: var(--sand);
  padding: 50px 44px;
}

.poster-article h2 {
  font-family: var(--font-display);
  font-size: 2.2rem;
  text-transform: uppercase;
  margin: 36px 0 16px;
  border-bottom: var(--hairline);
  padding-bottom: 10px;
}

.poster-article h2:first-of-type {
  margin-top: 0;
}

.poster-article p {
  font-size: 1.05rem;
  line-height: 1.8;
  margin-bottom: 18px;
}

.poster-article ul {
  padding-left: 24px;
  margin-bottom: 24px;
  font-size: 1.02rem;
  line-height: 1.8;
}

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

.highlight-box {
  border: var(--border-thick);
  background: var(--apricot);
  padding: 24px;
  font-weight: 600;
  font-size: 1.1rem;
  margin: 28px 0;
}

/* Sitemap Grid */
.sitemap-blocks {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-top: 24px;
}

.sitemap-box {
  border: var(--border-thick);
  background: var(--sand);
  padding: 32px;
}

.sitemap-box h3 {
  font-family: var(--font-display);
  font-size: 1.6rem;
  text-transform: uppercase;
  margin-bottom: 16px;
  color: var(--orange);
}

.sitemap-box ul {
  list-style: square;
  padding-left: 20px;
  margin-bottom: 0;
}

.sitemap-box li {
  margin-bottom: 10px;
  font-weight: 600;
}

.sitemap-box a:hover {
  color: var(--orange);
  text-decoration: underline;
}

/* Footer */
footer.site-footer {
  border-top: var(--border-thick);
  padding: 36px 0;
  background: var(--sand);
}

.footer-nav {
  display: flex;
  gap: 32px;
  list-style: none;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.footer-nav a {
  font-weight: 800;
  text-transform: uppercase;
  font-size: 0.9rem;
  border-bottom: 2px solid var(--espresso);
  padding-bottom: 2px;
}

.footer-nav a:hover {
  color: var(--orange);
  border-color: var(--orange);
}

.footer-meta {
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
}

@media (max-width: 768px) {
  body {
    border-width: 6px;
  }
  .poster-container {
    padding: 0 20px;
  }
  .poster-article {
    padding: 30px 20px;
  }
  .sitemap-blocks {
    grid-template-columns: 1fr;
  }
  .footer-nav {
    flex-direction: column;
    gap: 14px;
  }
}
/* ================= Blog & Article specifics ================= */
.breadcrumb {
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    margin-bottom: 24px;
}
.breadcrumb a {
    color: var(--orange);
}
.breadcrumb span {
    margin: 0 8px;
}
.article-header {
    border-bottom: var(--border-thick);
    padding: 60px 0;
}
.article-meta {
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    margin-top: 16px;
    display: flex;
    gap: 16px;
}
.article-body {
    padding: 60px 0;
    max-width: 800px;
    margin: 0 auto;
    font-size: 1.1rem;
    line-height: 1.8;
}
.article-body h2 {
    font-family: var(--font-display);
    font-size: 2.5rem;
    margin: 48px 0 24px;
    text-transform: uppercase;
    border-bottom: var(--hairline);
    padding-bottom: 12px;
}
.article-body h3 {
    font-family: var(--font-display);
    font-size: 1.8rem;
    margin: 32px 0 16px;
    text-transform: uppercase;
}
.article-body p {
    margin-bottom: 24px;
}
.article-body ul, .article-body ol {
    margin-bottom: 24px;
    padding-left: 24px;
}
.article-body li {
    margin-bottom: 12px;
}
.article-body img {
    max-width: 100%;
    height: auto;
    border: var(--border-thick);
    margin: 32px 0;
}
.article-body blockquote {
    border-left: 4px solid var(--orange);
    margin: 32px 0;
    font-style: italic;
    background: var(--apricot);
    padding: 24px;
    border: var(--border-thick);
}
.article-body a {
    color: var(--orange);
    text-decoration: underline;
    font-weight: bold;
}
.blog-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    border: var(--border-thick);
    border-bottom: none;
}
.blog-card {
    border-right: var(--hairline);
    border-bottom: var(--border-thick);
    padding: 32px;
    background: var(--sand);
    display: flex;
    flex-direction: column;
}
.blog-card:last-child {
    border-right: none;
}
.blog-card-category {
    font-size: 0.75rem;
    font-weight: 800;
    text-transform: uppercase;
    background: var(--espresso);
    color: var(--sand);
    padding: 4px 8px;
    align-self: flex-start;
    margin-bottom: 16px;
}
.blog-card-title {
    font-family: var(--font-display);
    font-size: 1.8rem;
    text-transform: uppercase;
    line-height: 1.1;
    margin-bottom: 16px;
    color: var(--espresso);
}
.blog-card-desc {
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: 24px;
    flex-grow: 1;
}
.blog-card-meta {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    border-top: var(--hairline);
    padding-top: 16px;
    margin-bottom: 24px;
    display: flex;
    justify-content: space-between;
}
/* ================= Floating Back to Top ================= */
#back-to-top {
  position: fixed;
  bottom: 40px;
  right: 40px;
  width: 50px;
  height: 50px;
  background-color: var(--orange);
  color: var(--sand);
  border: 2px solid var(--espresso);
  display: flex;
  justify-content: center;
  align-items: center;
  cursor: pointer;
  z-index: 9999;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s, visibility 0.3s, background-color 0.2s;
  font-family: var(--font-display);
  font-size: 1.5rem;
}
#back-to-top.show {
  opacity: 1;
  visibility: visible;
}
#back-to-top:hover {
  background-color: var(--espresso);
  color: var(--orange);
}

/* ================= Article Navigation ================= */
.article-navigation {
  display: flex;
  justify-content: space-between;
  border-top: 2px solid var(--espresso);
  margin-top: 60px;
  padding-top: 32px;
  flex-wrap: wrap;
  gap: 16px;
}
.article-navigation .btn-outline {
  font-size: 0.85rem;
  padding: 10px 16px;
}

/* Hero Image Specifics */
.hero-image-wrap {
  position: absolute;
  right: 5%;
  width: 120px; top: -10%; right: 2%;
  border: 2px solid var(--espresso);
  z-index: 10;
  background: var(--sand);
  padding: 6px;
  transform: rotate(3deg);
  box-shadow: 8px 8px 0 var(--espresso);
}
.hero-image-wrap img {
  width: 100%;
  height: auto;
  display: block;
  border: 2px solid var(--espresso);
}
@media (max-width: 1024px) {
  .hero-image-wrap {
    display: none; /* Mobile hide to keep text focus */
  }
}