:root {
  --ink: #15231f;
  --muted: #65736e;
  --paper: #f6f7f2;
  --white: #ffffff;
  --mist: #eef4ed;
  --line: #d8ded5;
  --jade: #0f766e;
  --jade-dark: #0b4f4a;
  --moss: #789643;
  --coral: #d86f45;
  --amber: #c79536;
  --shadow: 0 20px 46px rgba(21, 35, 31, 0.13);
}
* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Inter, "Segoe UI", Arial, sans-serif;
  line-height: 1.7;
}
img {
  display: block;
  max-width: 100%;
}
a {
  color: inherit;
  text-decoration: none;
}
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 74px;
  padding: 12px clamp(18px, 4vw, 58px);
  background: rgba(246, 247, 242, 0.94);
  border-bottom: 1px solid rgba(216, 222, 213, 0.86);
  backdrop-filter: blur(16px);
}
.brand {
  display: inline-flex;
  align-items: center;
  min-width: 210px;
}
.brand-logo {
  width: clamp(180px, 18vw, 250px);
  height: auto;
  max-height: 54px;
  object-fit: contain;
}
.site-nav {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 6px;
  flex-wrap: wrap;
}
.site-nav a {
  padding: 8px 12px;
  color: #33413d;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 700;
}
.site-nav a:hover,
.site-nav a.active {
  color: var(--white);
  background: var(--jade);
}
.nav-toggle {
  display: none;
  min-width: 70px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  color: var(--ink);
  font: inherit;
  font-weight: 800;
}
.hero,
.page-hero {
  position: relative;
  display: grid;
  align-items: end;
  min-height: calc(100vh - 74px);
  padding: clamp(92px, 13vh, 150px) clamp(20px, 6vw, 84px) clamp(66px, 10vh, 112px);
  color: var(--white);
  background-size: cover;
  background-position: center;
  overflow: hidden;
}
.hero::before,
.page-hero::before {
  position: absolute;
  inset: 0;
  content: "";
  background: linear-gradient(90deg, rgba(8, 31, 28, 0.82), rgba(8, 31, 28, 0.46) 56%, rgba(8, 31, 28, 0.16));
}
.hero-home {
  background-image: url("../images/hero-great-wall.jpg");
}
.tours-hero {
  background-image: url("../images/northwest-dunhuang.jpg");
}
.custom-hero {
  background-image: url("../images/custom-travel.jpg");
}
.guide-hero {
  background-image: url("../images/guide-map.jpg");
}
.about-hero {
  background-image: url("../images/team-planning.jpg");
}
.contact-hero {
  background-image: url("../images/contact-landscape.jpg");
}
.hero-content,
.page-hero > div {
  position: relative;
  width: min(790px, 100%);
}
.hero h1,
.page-hero h1 {
  margin: 8px 0 18px;
  font-size: clamp(42px, 7vw, 82px);
  line-height: 1.03;
  letter-spacing: 0;
}
.page-hero {
  min-height: 54vh;
}
.hero-lede,
.page-hero p {
  max-width: 690px;
  margin: 0;
  font-size: clamp(18px, 2vw, 23px);
}
.eyebrow {
  margin: 0 0 10px;
  color: var(--coral);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0;
  text-transform: uppercase;
}
.hero .eyebrow,
.page-hero .eyebrow {
  color: #ffd382;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 30px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border: 1px solid transparent;
  border-radius: 8px;
  font: inherit;
  font-weight: 850;
  cursor: pointer;
  transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}
.btn:hover {
  transform: translateY(-2px);
}
.btn.primary {
  color: var(--white);
  background: var(--jade);
}
.btn.light {
  color: var(--white);
  border-color: rgba(255, 255, 255, 0.72);
  background: rgba(255, 255, 255, 0.13);
}
.section {
  padding: clamp(58px, 8vw, 98px) clamp(20px, 6vw, 84px);
}
.section-heading {
  width: min(980px, 100%);
  margin: 0 auto 36px;
  text-align: center;
}
.section-heading.left {
  margin-left: 0;
  text-align: left;
}
.section-heading h2,
.booking-form h2,
.contact-panel h2 {
  margin: 0;
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.18;
}
.tinted {
  background: var(--mist);
}
.split {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(280px, 0.85fr);
  gap: clamp(28px, 6vw, 72px);
  align-items: center;
  width: min(1120px, 100%);
  margin: 0 auto;
}
.lead {
  color: #273936;
  font-size: clamp(18px, 2vw, 22px);
}
.metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}
.metrics div {
  min-height: 138px;
  padding: 22px 16px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}
.metrics strong {
  display: block;
  color: var(--jade);
  font-size: clamp(30px, 5vw, 48px);
  line-height: 1;
}
.metrics span {
  display: block;
  margin-top: 12px;
  color: var(--muted);
}
.tour-grid,
.review-grid,
.service-grid,
.advantage-grid,
.guide-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
  width: min(1180px, 100%);
  margin: 0 auto;
}
.tour-card,
.review,
.service-card,
.guide-card,
.advantage-grid article {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 12px 30px rgba(21, 35, 31, 0.08);
}
.tour-card img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}
.tour-card div,
.service-card,
.guide-card,
.advantage-grid article {
  padding: 22px;
}
.tag {
  display: inline-block;
  color: var(--coral);
  font-size: 13px;
  font-weight: 900;
}
.tour-card h3,
.service-card h2,
.guide-card h2,
.advantage-grid h3 {
  margin: 8px 0 8px;
  font-size: 22px;
  line-height: 1.25;
}
.tour-card p,
.service-card p,
.guide-card p,
.advantage-grid p,
.review blockquote {
  margin: 0;
  color: var(--muted);
}
.review {
  padding: 28px;
}
.review blockquote {
  font-size: 18px;
}
.review figcaption {
  margin-top: 18px;
  color: var(--jade-dark);
  font-weight: 850;
}
.route-list {
  display: grid;
  gap: 28px;
  width: min(1120px, 100%);
  margin: 0 auto;
}
.route-card {
  display: grid;
  grid-template-columns: minmax(280px, 0.92fr) minmax(0, 1.08fr);
  overflow: hidden;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}
.route-card img {
  width: 100%;
  height: 100%;
  min-height: 330px;
  object-fit: cover;
}
.route-card > div {
  padding: clamp(24px, 4vw, 42px);
}
.route-card h2 {
  margin: 8px 0 12px;
  font-size: clamp(28px, 4vw, 40px);
  line-height: 1.15;
}
.clean-list,
.check-list {
  margin: 18px 0 0;
  padding-left: 18px;
  color: var(--muted);
}
.clean-list li,
.check-list li {
  margin: 6px 0;
}
.service-grid {
  grid-template-columns: repeat(5, minmax(0, 1fr));
}
.service-icon {
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  color: var(--white);
  background: var(--jade);
  border-radius: 8px;
  font-weight: 900;
}
.process {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
  width: min(1120px, 100%);
  margin: 0 auto;
  padding: 0;
  list-style: none;
  counter-reset: step;
}
.process li {
  min-height: 210px;
  padding: 26px 22px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
}
.process li::before {
  counter-increment: step;
  content: "0" counter(step);
  display: block;
  margin-bottom: 24px;
  color: var(--amber);
  font-weight: 900;
  font-size: 30px;
}
.process strong,
.process span {
  display: block;
}
.process strong {
  margin-bottom: 8px;
  font-size: 22px;
}
.process span {
  color: var(--muted);
}
.guide-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
.guide-card.wide {
  grid-column: 1 / -1;
}
.season-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}
.season-grid p {
  padding: 18px;
  background: #f1f6ef;
  border: 1px solid var(--line);
  border-radius: 8px;
}
.season-grid strong {
  display: block;
  color: var(--jade);
  font-size: 24px;
}
.image-card {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  padding: 0;
}
.image-card img {
  width: 100%;
  height: 100%;
  min-height: 260px;
  object-fit: cover;
}
.image-card div {
  padding: 22px;
}
.about-split {
  align-items: stretch;
}
.feature-img {
  width: 100%;
  min-height: 370px;
  object-fit: cover;
  border-radius: 8px;
  box-shadow: var(--shadow);
}
.advantage-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}
.gallery {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr 1fr;
  gap: 18px;
  width: min(1120px, 100%);
  margin: 0 auto;
}
.gallery img {
  width: 100%;
  height: 360px;
  object-fit: cover;
  border-radius: 8px;
}
.gallery img:nth-child(2) {
  margin-top: 48px;
}
.contact-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(300px, 0.95fr);
  gap: 28px;
  width: min(1120px, 100%);
  margin: 0 auto;
}
.booking-form,
.contact-panel {
  padding: clamp(24px, 4vw, 38px);
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}
.booking-form {
  display: grid;
  gap: 16px;
}
.booking-form label {
  display: grid;
  gap: 7px;
  color: #2d3a37;
  font-weight: 800;
}
.booking-form input,
.booking-form select,
.booking-form textarea {
  width: 100%;
  min-height: 46px;
  padding: 11px 12px;
  color: var(--ink);
  background: #fbfcfa;
  border: 1px solid var(--line);
  border-radius: 8px;
  font: inherit;
}
.booking-form textarea {
  resize: vertical;
}
.form-note {
  min-height: 28px;
  margin: 0;
  color: var(--jade-dark);
  font-weight: 850;
}
.info-list {
  display: grid;
  gap: 16px;
  margin: 24px 0;
}
.info-list p {
  margin: 0;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}
.info-list strong,
.info-list span {
  display: block;
}
.info-list span,
.policy p {
  color: var(--muted);
}
.policy {
  padding: 20px;
  background: #f1f6ef;
  border: 1px solid var(--line);
  border-radius: 8px;
}
.policy h3,
.policy p {
  margin: 0;
}
.policy p {
  margin-top: 8px;
}
.faq-map {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(320px, 1.1fr);
  gap: 28px;
  width: min(1120px, 100%);
  margin: 0 auto;
}
details {
  margin-bottom: 12px;
  padding: 18px 20px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
}
summary {
  cursor: pointer;
  font-weight: 900;
}
details p {
  margin: 12px 0 0;
  color: var(--muted);
}
.map,
.store-map-img {
  width: 100%;
  min-height: 410px;
  border: 0;
  border-radius: 8px;
  box-shadow: var(--shadow);
}
.store-map-img {
  height: 410px;
  object-fit: cover;
  object-position: center;
  background: var(--white);
}
.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding: 34px clamp(20px, 6vw, 84px);
  color: rgba(255, 255, 255, 0.88);
  background: #17342f;
}
.site-footer p {
  margin: 8px 0 0;
  color: rgba(255, 255, 255, 0.72);
}
.site-footer nav {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}
.site-footer a:hover {
  color: #ffd382;
}
@media (max-width: 1080px) {
  .tour-grid,
  .review-grid,
  .service-grid,
  .advantage-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .process,
  .season-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}
@media (max-width: 820px) {
  .site-header {
    align-items: flex-start;
  }
  .nav-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }
  .site-nav {
    display: none;
    position: absolute;
    top: 74px;
    left: 0;
    right: 0;
    padding: 10px 18px 18px;
    background: rgba(246, 247, 242, 0.98);
    border-bottom: 1px solid var(--line);
  }
  .site-nav.open {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .site-nav a {
    background: var(--white);
    border: 1px solid var(--line);
  }
  .hero,
  .page-hero {
    min-height: 76vh;
    padding-top: 96px;
  }
  .page-hero {
    min-height: 48vh;
  }
  .split,
  .route-card,
  .contact-layout,
  .faq-map,
  .image-card {
    grid-template-columns: 1fr;
  }
  .metrics,
  .tour-grid,
  .review-grid,
  .service-grid,
  .advantage-grid,
  .guide-grid,
  .process,
  .season-grid {
    grid-template-columns: 1fr;
  }
  .guide-card.wide {
    grid-column: auto;
  }
  .route-card img {
    min-height: 250px;
  }
  .gallery {
    grid-template-columns: 1fr;
  }
  .gallery img,
  .gallery img:nth-child(2) {
    height: 260px;
    margin-top: 0;
  }
  .site-footer {
    display: block;
  }
  .site-footer nav {
    margin-top: 18px;
  }
}
@media (max-width: 520px) {
  .brand {
    min-width: 154px;
  }
  .brand-logo {
    width: 154px;
    max-height: 44px;
  }
  .site-nav.open {
    grid-template-columns: 1fr;
  }
  .hero h1,
  .page-hero h1 {
    font-size: 40px;
  }
  .metrics div,
  .process li {
    min-height: auto;
  }
  .btn {
    width: 100%;
  }
}
.mobile-warning{display:none;position:fixed;inset:0;z-index:9999;background:var(--paper);justify-content:center;align-items:center;padding:20px}
.mobile-warning-content{max-width:400px;text-align:center;color:var(--ink)}
.mobile-warning h2{font-size:clamp(24px,5vw,32px);margin:0 0 16px;color:var(--jade)}
.mobile-warning p{font-size:clamp(16px,3vw,20px);color:var(--muted)}
@media (max-width:1080px){.mobile-warning{display:flex}.site-header,main,.site-footer{display:none !important}}