:root {
  --ink: #172018;
  --muted: #677064;
  --paper: #fbfaf5;
  --line: #d9ded2;
  --forest: #245b22;
  --moss: #66a536;
  --amber: #d8911d;
  --clay: #b3482d;
  --white: #ffffff;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.65;
}

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin: 0 auto;
  padding: 14px clamp(18px, 4vw, 54px);
  background: rgba(251, 250, 245, 0.92);
  border-bottom: 1px solid rgba(23, 32, 24, 0.08);
  backdrop-filter: blur(16px);
}

main {
  width: 100%;
  margin: 0 auto;
  overflow: hidden;
  background: var(--paper);
}

.brand {
  font-weight: 800;
  color: var(--forest);
  white-space: nowrap;
}

nav {
  width: 100%;
  display: flex;
  align-items: center;
  gap: clamp(12px, 2.4vw, 28px);
  color: #465044;
  font-size: 14px;
  overflow-x: auto;
  white-space: nowrap;
  scrollbar-width: none;
}

nav::-webkit-scrollbar {
  display: none;
}

.hero {
  position: relative;
  min-height: calc(100vh - 64px);
  display: grid;
  align-items: end;
  overflow: hidden;
  background: #1b2419;
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(6, 13, 8, 0.78), rgba(6, 13, 8, 0.22) 58%, rgba(6, 13, 8, 0.55)),
    linear-gradient(0deg, rgba(6, 13, 8, 0.78), rgba(6, 13, 8, 0) 46%);
}

.hero > img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-copy {
  position: relative;
  z-index: 1;
  width: min(760px, calc(100% - 36px));
  margin: 0 auto 64px 24px;
  color: var(--white);
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--amber);
  font-weight: 800;
  letter-spacing: 0;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 18px;
  font-size: clamp(38px, 11vw, 54px);
  line-height: 1.04;
  letter-spacing: 0;
  overflow-wrap: anywhere;
}

h2 {
  margin-bottom: 18px;
  font-size: clamp(26px, 7vw, 36px);
  line-height: 1.16;
  letter-spacing: 0;
  overflow-wrap: anywhere;
}

h3 {
  margin-bottom: 10px;
  font-size: 22px;
  line-height: 1.25;
  letter-spacing: 0;
}

.lead {
  max-width: 620px;
  font-size: clamp(18px, 2vw, 24px);
  color: rgba(255, 255, 255, 0.88);
  overflow-wrap: anywhere;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  padding: 0 22px;
  border-radius: 8px;
  font-weight: 800;
}

.button.primary {
  background: var(--amber);
  color: #17130a;
}

.button.secondary {
  color: var(--white);
  border: 1px solid rgba(255, 255, 255, 0.52);
}

.quick-info {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--line);
  border-bottom: 1px solid var(--line);
}

.quick-info div {
  min-height: 112px;
  padding: 24px clamp(18px, 3vw, 36px);
  background: var(--white);
}

.quick-info span {
  display: block;
  color: var(--muted);
  font-size: 14px;
}

.quick-info strong {
  display: block;
  margin-top: 8px;
  font-size: clamp(20px, 2.5vw, 30px);
  line-height: 1.2;
}

.section {
  padding: clamp(68px, 9vw, 120px) clamp(18px, 5vw, 72px);
}

.intro {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 6vw, 82px);
  align-items: center;
}

.section-copy p:not(.eyebrow),
.section-heading p {
  color: var(--muted);
  font-size: 18px;
}

.feature-image img,
.split > img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  border-radius: 8px;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 36px;
}

.highlight-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.highlight-grid article {
  min-height: 260px;
  padding: 30px;
  background: var(--white);
}

.highlight-grid span {
  color: var(--moss);
  font-size: 42px;
  font-weight: 900;
  line-height: 1;
}

.highlight-grid p,
.timeline p,
.cost-panel li {
  color: var(--muted);
}

.split {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 6vw, 82px);
  align-items: center;
  padding: clamp(68px, 9vw, 110px) clamp(18px, 5vw, 72px);
  background: #eef3e8;
}

.activity {
  background: #fffaf0;
}

.activity-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.activity-grid img {
  width: 100%;
  aspect-ratio: 3 / 4.15;
  object-fit: cover;
  border: 1px solid rgba(23, 32, 24, 0.08);
  border-radius: 8px;
  background: var(--white);
  box-shadow: 0 12px 26px rgba(52, 69, 42, 0.08);
}

.check-list {
  display: grid;
  gap: 14px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.check-list li {
  position: relative;
  padding-left: 26px;
  color: #364333;
  font-weight: 700;
}

.check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 9px;
  height: 9px;
  background: var(--amber);
  border-radius: 50%;
}

.timeline {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}

.timeline article {
  min-height: 260px;
  padding: 28px;
  border-left: 4px solid var(--forest);
  background: var(--white);
  border-radius: 8px;
  box-shadow: 0 18px 44px rgba(52, 69, 42, 0.08);
}

.timeline span {
  display: inline-block;
  margin-bottom: 14px;
  color: var(--clay);
  font-size: 24px;
  font-weight: 900;
}

.cost {
  background: var(--white);
}

.cost-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}

.cost-panel {
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
}

.cost-panel.accent {
  border-top: 5px solid var(--amber);
}

.cost-panel.warning {
  border-top: 5px solid var(--clay);
}

.cost-panel ul {
  display: grid;
  gap: 10px;
  margin: 0;
  padding-left: 20px;
}

.signup {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
  align-items: center;
  padding: clamp(48px, 7vw, 82px) clamp(18px, 5vw, 72px);
  color: var(--white);
  background: #1f351d;
}

.signup p:not(.eyebrow) {
  max-width: 680px;
  color: rgba(255, 255, 255, 0.78);
  font-size: 18px;
}

.qr-placeholder {
  display: grid;
  width: 210px;
  height: 210px;
  place-items: center;
  color: rgba(255, 255, 255, 0.72);
  font-weight: 800;
  border: 2px dashed rgba(255, 255, 255, 0.42);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.08);
}

.qr-placeholder span {
  display: grid;
  width: 150px;
  height: 150px;
  place-items: center;
  text-align: center;
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: 6px;
}

.signup img {
  width: 210px;
  height: 210px;
  object-fit: cover;
  background: var(--white);
  border: 10px solid var(--white);
  border-radius: 8px;
}

@media (max-width: 1020px) {
  .quick-info,
  .highlight-grid,
  .timeline,
  .cost-layout {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .intro,
  .split {
    grid-template-columns: 1fr;
  }
}

@media (min-width: 1021px) {
  .site-header {
    flex-direction: row;
    padding: 18px clamp(48px, 7vw, 112px);
  }

  nav {
    width: auto;
    justify-content: flex-end;
    overflow: visible;
  }

  .hero {
    min-height: calc(100vh - 74px);
  }

  .hero-copy {
    width: min(760px, calc(100% - 160px));
    margin: 0 0 96px clamp(64px, 9vw, 132px);
  }

  h1 {
    font-size: clamp(56px, 6vw, 86px);
    max-width: 900px;
  }

  h2 {
    font-size: clamp(34px, 3.4vw, 52px);
  }

  .quick-info {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .section,
  .split,
  .signup {
    padding-right: clamp(64px, 8vw, 128px);
    padding-left: clamp(64px, 8vw, 128px);
  }

  .intro,
  .split {
    grid-template-columns: minmax(0, 0.92fr) minmax(420px, 1.08fr);
  }

  .route .section-heading,
  .activity .section-heading,
  .itinerary .section-heading,
  .cost .section-heading {
    max-width: 980px;
  }

  .highlight-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .activity-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 18px;
  }

  .activity-grid img {
    aspect-ratio: 4 / 5;
  }

  .timeline {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .cost-layout {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .signup {
    grid-template-columns: minmax(0, 1fr) auto;
  }
}

@media (max-width: 720px) {
  .site-header {
    align-items: flex-start;
  }

  nav {
    width: 100%;
    overflow-x: auto;
    padding-bottom: 2px;
  }

  .hero {
    min-height: 82vh;
  }

  .hero-copy {
    width: min(330px, calc(100% - 36px));
    margin-bottom: 54px;
    margin-left: 18px;
  }

  h1 {
    max-width: 100%;
    font-size: clamp(34px, 9.5vw, 40px);
    word-break: break-all;
  }

  .lead {
    max-width: 100%;
    font-size: 18px;
    word-break: break-all;
  }

  .quick-info,
  .highlight-grid,
  .timeline,
  .cost-layout,
  .signup {
    grid-template-columns: 1fr;
  }

  .quick-info div {
    min-height: auto;
  }

  .highlight-grid article,
  .timeline article {
    min-height: auto;
  }

  .signup img,
  .qr-placeholder {
    width: min(210px, 72vw);
    height: auto;
    aspect-ratio: 1;
  }
}