/* ========================================
   元大都城垣遗址公园 — 视觉系统
   主色：城垣土 #D4B88C | 墨炭 #3A3A3A | 生态绿 #4A7C59
   点缀：朱红 #C41E3A | 海棠粉 #F8B195
   ======================================== */

:root {
  --wall: #D4B88C;
  --wall-dark: #B8956A;
  --wall-light: #E8D5B5;
  --ink: #3A3A3A;
  --ink-soft: #5C5C5C;
  --green: #4A7C59;
  --green-dark: #2D5A3A;
  --red: #C41E3A;
  --crabapple: #F8B195;
  --cream: #FAF6F0;
  --white: #FEFCF8;

  --font-serif: 'Noto Serif SC', 'Songti SC', serif;
  --font-sans: 'Noto Sans SC', 'PingFang SC', sans-serif;

  --header-h: 72px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --shadow: 0 8px 32px rgba(58, 58, 58, 0.12);
}

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

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

body {
  font-family: var(--font-sans);
  color: var(--ink);
  background: var(--cream);
  line-height: 1.7;
  overflow-x: hidden;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--green-dark);
  text-decoration: none;
  transition: color 0.25s;
}

a:hover {
  color: var(--red);
}

.container {
  width: min(1200px, 92vw);
  margin: 0 auto;
}

/* ---- 导航 ---- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-h);
  background: rgba(250, 246, 240, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(212, 184, 140, 0.4);
  transition: box-shadow 0.3s;
}

.site-header.scrolled {
  box-shadow: var(--shadow);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  width: min(1200px, 92vw);
  margin: 0 auto;
}

.logo {
  display: flex;
  flex-direction: column;
  color: var(--ink);
  line-height: 1.2;
}

.logo-cn {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.logo-en {
  font-size: 0.62rem;
  color: var(--ink-soft);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--ink);
  position: relative;
  padding: 0.25rem 0;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--red);
  transition: width 0.3s var(--ease);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--ink);
  transition: transform 0.3s, opacity 0.3s;
}

/* ---- 首屏 ---- */
.hero {
  position: relative;
  height: 100vh;
  min-height: 600px;
  overflow: hidden;
}

.hero-slides {
  position: absolute;
  inset: 0;
}

.hero-slide {
  position: absolute;
  inset: 0;
  background-image: var(--bg);
  background-size: cover;
  background-position: center;
  opacity: 0;
  transform: scale(1.06);
  transition: opacity 1.2s var(--ease), transform 8s linear;
}

.hero-slide.active {
  opacity: 1;
  transform: scale(1);
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    rgba(45, 90, 58, 0.55) 0%,
    rgba(58, 58, 58, 0.45) 50%,
    rgba(196, 30, 58, 0.25) 100%
  );
}

.hero-content {
  position: absolute;
  bottom: 28%;
  left: 8%;
  max-width: 640px;
  color: var(--white);
  z-index: 2;
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s 0.3s, transform 0.8s 0.3s var(--ease);
}

.hero-slide.active .hero-content {
  opacity: 1;
  transform: translateY(0);
}

.hero-tag {
  display: inline-block;
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  padding: 0.35rem 1rem;
  border: 1px solid rgba(255, 255, 255, 0.5);
  margin-bottom: 1.2rem;
  backdrop-filter: blur(4px);
}

.hero-content h1 {
  font-family: var(--font-serif);
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  font-weight: 900;
  line-height: 1.15;
  margin-bottom: 0.8rem;
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
}

.hero-sub {
  font-size: clamp(0.95rem, 2vw, 1.15rem);
  font-weight: 300;
  opacity: 0.92;
  line-height: 1.6;
}

.hero-slogans {
  position: absolute;
  right: 5%;
  top: 50%;
  transform: translateY(-50%);
  z-index: 3;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  writing-mode: vertical-rl;
  text-orientation: mixed;
}

.hero-slogans blockquote {
  font-family: var(--font-serif);
  font-size: 1rem;
  color: rgba(255, 255, 255, 0.85);
  letter-spacing: 0.3em;
  border-right: 2px solid var(--crabapple);
  padding-right: 1rem;
  font-style: normal;
}

.hero-controls {
  position: absolute;
  bottom: 12%;
  left: 8%;
  display: flex;
  align-items: center;
  gap: 1rem;
  z-index: 3;
}

.hero-prev,
.hero-next {
  width: 44px;
  height: 44px;
  border: 1px solid rgba(255, 255, 255, 0.5);
  background: rgba(255, 255, 255, 0.1);
  color: white;
  font-size: 1.5rem;
  cursor: pointer;
  backdrop-filter: blur(4px);
  transition: background 0.3s, border-color 0.3s;
  line-height: 1;
}

.hero-prev:hover,
.hero-next:hover {
  background: rgba(196, 30, 58, 0.6);
  border-color: var(--red);
}

.hero-dots {
  display: flex;
  gap: 0.5rem;
}

.hero-dot {
  width: 32px;
  height: 3px;
  background: rgba(255, 255, 255, 0.35);
  border: none;
  cursor: pointer;
  transition: background 0.3s, width 0.3s;
  padding: 0;
}

.hero-dot.active {
  background: var(--crabapple);
  width: 48px;
}

.scroll-hint {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.4rem;
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  z-index: 3;
  animation: bounce 2s infinite;
}

@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(8px); }
}

/* ---- 数据条 ---- */
.stats-bar {
  background: var(--ink);
  padding: 2.5rem 0;
  position: relative;
}

.stats-bar::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--wall), var(--red), var(--green));
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 1.5rem;
  text-align: center;
}

.stat-item {
  color: var(--wall-light);
}

.stat-num {
  display: block;
  font-family: var(--font-serif);
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 700;
  color: var(--white);
  line-height: 1.2;
}

.stat-num .unit {
  font-size: 0.55em;
  font-weight: 400;
  margin-left: 2px;
}

.stat-label {
  display: block;
  font-size: 0.75rem;
  margin-top: 0.4rem;
  opacity: 0.7;
  letter-spacing: 0.05em;
}

/* ---- 通用区块 ---- */
.section {
  padding: 6rem 0;
}

.section-header {
  text-align: center;
  margin-bottom: 4rem;
}

.section-header.light {
  color: var(--white);
}

.section-tag {
  display: inline-block;
  font-size: 0.75rem;
  letter-spacing: 0.25em;
  color: var(--red);
  margin-bottom: 1rem;
  position: relative;
}

.section-tag::before,
.section-tag::after {
  content: '—';
  margin: 0 0.6rem;
  opacity: 0.5;
}

.section-header h2 {
  font-family: var(--font-serif);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 1rem;
}

.section-lead {
  max-width: 680px;
  margin: 0 auto;
  color: var(--ink-soft);
  font-size: 1.05rem;
}

.section-header.light .section-lead {
  color: rgba(255, 255, 255, 0.8);
}

.sub-title {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  margin-bottom: 2rem;
  padding-left: 1rem;
  border-left: 4px solid var(--red);
}

/* ---- 关于 ---- */
.about {
  background: var(--white);
}

.about-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 3rem;
  align-items: start;
  margin-bottom: 4rem;
}

.about-text h3 {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  margin: 2rem 0 0.8rem;
  color: var(--green-dark);
}

.about-text h3:first-child {
  margin-top: 0;
}

.about-text p {
  color: var(--ink-soft);
  margin-bottom: 1rem;
}

.quote-block {
  margin-top: 2rem;
  padding: 1.5rem 2rem;
  background: linear-gradient(135deg, var(--wall-light), var(--cream));
  border-left: 4px solid var(--wall-dark);
  font-family: var(--font-serif);
}

.quote-block p {
  font-size: 1.1rem;
  font-style: italic;
  color: var(--ink);
  margin-bottom: 0.5rem;
}

.quote-block cite {
  font-size: 0.85rem;
  color: var(--ink-soft);
  font-style: normal;
}

.about-figure {
  position: relative;
}

.about-figure img {
  border-radius: 4px;
  box-shadow: var(--shadow);
}

.about-figure figcaption {
  margin-top: 0.8rem;
  font-size: 0.85rem;
  color: var(--ink-soft);
  text-align: center;
}

/* 时间轴 */
.timeline-section {
  margin-bottom: 4rem;
}

.timeline {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.2rem;
}

.timeline-item {
  padding: 1.2rem 1.5rem;
  background: var(--cream);
  border: 1px solid rgba(212, 184, 140, 0.5);
  position: relative;
  transition: transform 0.3s, box-shadow 0.3s;
}

.timeline-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.timeline-item.highlight {
  background: linear-gradient(135deg, var(--green-dark), var(--green));
  color: var(--white);
  border-color: transparent;
}

.timeline-item time {
  display: block;
  font-family: var(--font-serif);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--red);
  margin-bottom: 0.4rem;
}

.timeline-item.highlight time {
  color: var(--crabapple);
}

.timeline-item p {
  font-size: 0.9rem;
  line-height: 1.5;
}

/* 规划 */
.planning-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.plan-card {
  padding: 2rem 1.5rem;
  background: var(--cream);
  text-align: center;
  border-top: 3px solid var(--wall);
  transition: border-color 0.3s, transform 0.3s;
}

.plan-card:hover {
  border-color: var(--red);
  transform: translateY(-4px);
}

.plan-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 1rem;
  background: var(--ink);
  color: var(--wall);
  font-family: var(--font-serif);
  font-size: 1.3rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
}

.plan-card h4 {
  font-family: var(--font-serif);
  margin-bottom: 0.6rem;
}

.plan-card p {
  font-size: 0.88rem;
  color: var(--ink-soft);
}

.figures-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.figure-card {
  padding: 1.5rem;
  background: var(--ink);
  color: var(--wall-light);
  text-align: center;
}

.figure-card strong {
  display: block;
  font-family: var(--font-serif);
  font-size: 1.2rem;
  color: var(--white);
  margin-bottom: 0.5rem;
}

.figure-card span {
  font-size: 0.85rem;
  opacity: 0.85;
}

/* ---- 景观 ---- */
.scenery {
  background: linear-gradient(160deg, var(--green-dark) 0%, #1a3d28 60%, var(--ink) 100%);
  position: relative;
}

.scenery::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  pointer-events: none;
}

.scenery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  position: relative;
}

.scenery-card {
  background: rgba(255, 255, 255, 0.06);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  overflow: hidden;
  transition: transform 0.4s var(--ease), box-shadow 0.4s;
}

.scenery-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.scenery-card.featured {
  grid-column: span 1;
}

.scenery-img {
  height: 200px;
  overflow: hidden;
}

.scenery-card.featured .scenery-img {
  height: 260px;
}

.scenery-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s var(--ease);
}

.scenery-card:hover .scenery-img img {
  transform: scale(1.08);
}

.scenery-body {
  padding: 1.5rem;
  color: var(--white);
}

.scenery-num {
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 900;
  color: var(--crabapple);
  opacity: 0.6;
  line-height: 1;
}

.scenery-body h3 {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  margin: 0.3rem 0 0.4rem;
}

.scenery-loc {
  font-size: 0.78rem;
  color: var(--wall);
  margin-bottom: 0.8rem;
  letter-spacing: 0.05em;
}

.scenery-body p:last-child {
  font-size: 0.88rem;
  opacity: 0.85;
  line-height: 1.6;
}

/* ---- 文化遗产 ---- */
.heritage {
  background: var(--cream);
}

.heritage-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.heritage-card {
  padding: 2rem;
  background: var(--white);
  border-top: 4px solid var(--wall-dark);
  box-shadow: 0 4px 16px rgba(58, 58, 58, 0.06);
}

.heritage-card h3 {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  margin-bottom: 1.2rem;
  color: var(--green-dark);
}

.heritage-card ul {
  list-style: none;
}

.heritage-card li {
  font-size: 0.9rem;
  color: var(--ink-soft);
  padding: 0.6rem 0;
  border-bottom: 1px dashed rgba(212, 184, 140, 0.5);
  line-height: 1.5;
}

.heritage-card li:last-child {
  border-bottom: none;
}

.heritage-card strong {
  color: var(--ink);
}

/* ---- 游览指南 ---- */
.guide {
  background: linear-gradient(180deg, var(--wall-dark) 0%, var(--wall) 100%);
}

.guide-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
}

.guide-info h3,
.guide-routes h3 {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  color: var(--ink);
  margin-bottom: 1.2rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--red);
  display: inline-block;
}

.info-list div {
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: 0.5rem;
  padding: 0.7rem 0;
  border-bottom: 1px solid rgba(58, 58, 58, 0.15);
}

.info-list dt {
  font-weight: 600;
  font-size: 0.9rem;
}

.info-list dd {
  font-size: 0.9rem;
  color: var(--ink-soft);
}

.transport {
  margin-top: 1.5rem;
}

.transport-block {
  margin-bottom: 1rem;
}

.transport-block h4 {
  font-size: 0.95rem;
  margin-bottom: 0.3rem;
}

.transport-block p {
  font-size: 0.88rem;
  color: var(--ink-soft);
}

.route-card {
  background: rgba(255, 255, 255, 0.7);
  padding: 1.5rem;
  margin-bottom: 1rem;
  border-left: 4px solid var(--wall-dark);
  transition: background 0.3s, transform 0.3s;
}

.route-card:hover {
  background: var(--white);
  transform: translateX(4px);
}

.route-card.highlight {
  border-left-color: var(--red);
  background: var(--white);
}

.route-badge {
  display: inline-block;
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  background: var(--ink);
  color: var(--wall-light);
  padding: 0.2rem 0.6rem;
  margin-bottom: 0.6rem;
}

.route-card h4 {
  font-family: var(--font-serif);
  margin-bottom: 0.4rem;
}

.route-card p {
  font-size: 0.88rem;
  color: var(--ink-soft);
  margin-bottom: 0.5rem;
}

.route-time {
  font-size: 0.78rem;
  color: var(--green-dark);
  font-weight: 500;
}

.facilities {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 1rem;
}

.facilities span {
  font-size: 0.78rem;
  padding: 0.35rem 0.8rem;
  background: rgba(255, 255, 255, 0.6);
  border: 1px solid rgba(58, 58, 58, 0.15);
  border-radius: 2px;
}

/* ---- 导览图 ---- */
.map-section {
  background: var(--white);
  padding-bottom: 4rem;
}

.map-figure {
  text-align: center;
}

.map-figure img {
  width: 100%;
  border: 1px solid rgba(212, 184, 140, 0.5);
  box-shadow: var(--shadow);
}

.map-figure figcaption {
  margin-top: 1rem;
  font-size: 0.9rem;
  color: var(--ink-soft);
}

/* ---- 页脚 ---- */
.site-footer {
  background: var(--ink);
  color: var(--wall-light);
  padding-top: 3rem;
}

.footer-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  padding-bottom: 2rem;
}

.footer-brand h2 {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  color: var(--white);
  margin-bottom: 0.5rem;
}

.footer-brand p {
  font-size: 0.9rem;
  opacity: 0.7;
}

.footer-links {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

.footer-links h4 {
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  color: var(--wall);
  margin-bottom: 1rem;
}

.footer-links a {
  display: block;
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.88rem;
  padding: 0.3rem 0;
  transition: color 0.3s;
}

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

.footer-links p {
  font-size: 0.88rem;
  opacity: 0.7;
  margin-bottom: 0.3rem;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 1.2rem 0;
  text-align: center;
}

.footer-bottom p {
  font-size: 0.8rem;
  opacity: 0.5;
}

/* ---- 入场动画 ---- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---- 响应式 ---- */
@media (max-width: 1024px) {
  .stats-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .about-grid,
  .guide-grid {
    grid-template-columns: 1fr;
  }

  .timeline {
    grid-template-columns: repeat(2, 1fr);
  }

  .planning-grid,
  .heritage-grid {
    grid-template-columns: 1fr 1fr;
  }

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

  .hero-slogans {
    display: none;
  }
}

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

  .nav-links {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: var(--cream);
    flex-direction: column;
    padding: 1.5rem 2rem;
    gap: 0;
    transform: translateY(-120%);
    opacity: 0;
    transition: transform 0.4s var(--ease), opacity 0.4s;
    box-shadow: var(--shadow);
  }

  .nav-links.open {
    transform: translateY(0);
    opacity: 1;
  }

  .nav-links li {
    border-bottom: 1px solid rgba(212, 184, 140, 0.3);
  }

  .nav-links a {
    display: block;
    padding: 1rem 0;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .timeline,
  .planning-grid,
  .figures-row,
  .heritage-grid,
  .scenery-grid {
    grid-template-columns: 1fr;
  }

  .hero-content {
    left: 5%;
    right: 5%;
    bottom: 22%;
  }

  .footer-inner,
  .footer-links {
    grid-template-columns: 1fr;
  }
}