:root {
  --forest: #1b4332;
  --forest-deep: #0f2a1f;
  --sand: #f4e8d0;
  --sand-soft: #faf3e6;
  --white: #ffffff;
  --ink: #1a1a1a;
  --muted: #3d4a42;
  --line: #c9b896;
  --max: 920px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", sans-serif;
  color: var(--ink);
  background: var(--white);
  line-height: 1.75;
  padding-bottom: 88px;
}

a {
  color: var(--forest);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.site-header {
  background: var(--forest);
  color: var(--white);
  padding: 28px 0 22px;
  border-bottom: 6px solid var(--forest-deep);
}

.wrap {
  width: min(var(--max), calc(100% - 40px));
  margin: 0 auto;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  color: var(--white);
  text-decoration: none;
  margin-bottom: 18px;
}

.brand:hover {
  text-decoration: none;
}

.brand strong {
  font-size: 26px;
  letter-spacing: 0.08em;
  font-weight: 700;
}

.brand span {
  display: block;
  font-size: 13px;
  opacity: 0.85;
  letter-spacing: 0.04em;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.nav a {
  display: inline-block;
  color: var(--white);
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: 999px;
  padding: 7px 18px;
  font-size: 14px;
  text-decoration: none;
}

.nav a:hover {
  background: rgba(255, 255, 255, 0.16);
  text-decoration: none;
}

.nav a.on {
  background: var(--sand);
  color: var(--forest);
  border-color: var(--sand);
  font-weight: 700;
}

.qa {
  padding: 42px 0;
  border-left: 8px solid var(--forest);
}

.qa.sand {
  background: var(--sand);
}

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

.hero {
  background: var(--sand-soft);
  padding: 48px 0 40px;
  border-left: 8px solid var(--forest);
}

.hero h1,
.qa h2,
.qa h1 {
  font-family: KaiTi, STKaiti, "STKaiti", "Kaiti SC", serif;
  color: var(--forest);
  line-height: 1.4;
  font-weight: 600;
}

.hero h1 {
  font-size: 30px;
  margin-bottom: 16px;
}

.qa h2 {
  font-size: 24px;
  margin-bottom: 14px;
}

.qa h3 {
  font-family: KaiTi, STKaiti, "STKaiti", serif;
  font-size: 18px;
  color: var(--forest);
  margin: 22px 0 8px;
}

.lead,
.answer p,
.faq-item p {
  color: var(--muted);
  font-size: 16px;
  margin-bottom: 12px;
}

.caps {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  list-style: none;
  margin: 18px 0 20px;
}

.caps li {
  background: var(--forest);
  color: var(--white);
  padding: 6px 16px;
  border-radius: 4px;
  font-size: 14px;
  letter-spacing: 0.12em;
}

.btn-win,
.btn-cta,
.dock a,
.platforms a {
  display: inline-block;
  border-radius: 4px;
  padding: 11px 22px;
  font-size: 15px;
  text-decoration: none;
  margin: 0 8px 10px 0;
}

.btn-win {
  background: var(--forest);
  color: var(--white);
  font-weight: 700;
  font-size: 17px;
  padding: 13px 26px;
}

.btn-win:hover,
.btn-cta:hover,
.platforms a:hover,
.dock a:hover {
  text-decoration: none;
  filter: brightness(1.08);
}

.btn-cta {
  background: transparent;
  color: var(--forest);
  border: 2px solid var(--forest);
  font-weight: 700;
}

.platforms {
  margin-top: 16px;
}

.platforms a {
  background: var(--white);
  border: 1px solid var(--forest);
  color: var(--forest);
}

.qa.sand .platforms a {
  background: var(--white);
}

.mark {
  color: var(--forest);
  font-weight: 700;
}

.site-footer {
  background: var(--forest-deep);
  color: var(--sand);
  padding: 28px 0 36px;
  font-size: 13px;
  line-height: 1.8;
}

.site-footer p + p {
  margin-top: 8px;
}

.dock {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--forest);
  color: var(--white);
  padding: 12px 0;
  box-shadow: 0 -4px 16px rgba(27, 67, 50, 0.28);
  z-index: 20;
}

.dock .wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 4px;
}

.dock strong {
  margin-right: 10px;
  font-size: 14px;
}

.dock a {
  background: var(--sand);
  color: var(--forest);
  margin: 0 6px 0 0;
  padding: 8px 14px;
  font-size: 13px;
  font-weight: 700;
}

svg.mark-svg {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
}

@media (max-width: 640px) {
  .hero h1 {
    font-size: 24px;
  }

  .qa h2 {
    font-size: 20px;
  }

  .dock strong {
    width: 100%;
  }
}