:root {
  color-scheme: light;
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", sans-serif;
  color: #173b43;
  background: #d3f0ee;
  font-synthesis: none;
  letter-spacing: 0;
}
* { box-sizing: border-box; letter-spacing: 0; }
body { margin: 0; min-width: 280px; }
button { font: inherit; cursor: pointer; }
button:focus-visible { outline: 3px solid #a52b23; outline-offset: 4px; }
[hidden] { display: none !important; }
.seascape { position: fixed; inset: 0; overflow: hidden; pointer-events: none; }
.seascape picture { display: block; height: 100%; }
.seascape img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 42% center;
  animation: sea-drift 18s ease-in-out infinite alternate;
}
.seascape::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent 42%, #e8faf022 65%, #eafcf05c), linear-gradient(0deg, #074c4929, transparent 25%);
}
.page { position: relative; min-height: 100svh; max-width: 1536px; margin: auto; padding: 38px 56px 30px; display: flex; flex-direction: column; }
.masthead { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.identity { display: flex; align-items: center; gap: 10px; padding: 6px 16px 6px 9px; border: 1px solid #c1e5db; border-radius: 30px; background: #fffffff0; box-shadow: 0 3px 14px #17414a14; font-size: 12px; font-weight: 600; }
.identity img { width: 30px; height: 30px; object-fit: contain; }
.motion-toggle { display: grid; place-items: center; flex: 0 0 44px; width: 44px; height: 44px; border-radius: 50%; border: 1px solid #c1e5db; background: #fffffff0; color: #175561; }
.motion-toggle:hover { background: #fff; color: #b33b32; }
main { flex: 1; display: flex; align-items: center; justify-content: flex-end; padding: 48px 0; }
.navigation { width: 44%; max-width: 560px; min-width: 0; }
.heading { text-align: right; padding: 0 0 28px 12px; text-shadow: 0 1px 18px #fff; }
.theme { margin: 0 0 12px; display: flex; justify-content: flex-end; gap: 9px; align-items: center; font-size: 13px; font-weight: 700; color: #165b60; }
.theme span { width: 8px; height: 8px; background: #c3483c; border-radius: 50%; }
h1 { font-size: 46px; line-height: 1.25; margin: 0; color: #15333b; font-weight: 900; }
h1 span { color: #b73931; }
.intro { margin: 12px 0 0; font-size: 14px; line-height: 1.8; font-weight: 500; }
.links { display: grid; gap: 14px; }
.links button { width: 100%; min-height: 66px; display: grid; grid-template-columns: 10px minmax(0, 1fr) 24px; align-items: center; gap: 16px; text-align: left; padding: 14px 24px; border: 1px solid #bb945c; border-radius: 8px; background: linear-gradient(135deg, #fffffff5, #f0f9fff0); color: #163840; font-size: 18px; font-weight: 700; line-height: 1.4; box-shadow: 0 8px 24px -4px #032b382b, inset 0 1px 0 #fff; transition: border-color .2s, background-color .2s, box-shadow .2s; }
.links button:hover { border-color: #b73a31; color: #a22d26; box-shadow: 0 8px 24px -4px #9d403d35, inset 0 1px 0 #fff; }
.links button:active { background: #e8f5f3; }
.links button:disabled { cursor: wait; opacity: .72; }
.marker { width: 9px; height: 9px; border-radius: 50%; background: #199d90; }
.links button:nth-child(2) .marker { background: #249cba; }
.links button:nth-child(4) .marker { background: #81959c; }
.links button:nth-child(5) .marker { background: #be9146; }
.links .coral { border-color: #cc7565; background: #fffffff7; }
.coral .marker { background: #cb4c41; }
.arrow { font-size: 24px; font-weight: 400; line-height: 1; text-align: right; color: #247274; }
.coral .arrow { color: #c24336; }
#nav-status { margin: 14px 0 0; padding: 12px 16px; background: #fff6ed; border-left: 3px solid #b53329; color: #792720; line-height: 1.6; font-size: 14px; overflow-wrap: anywhere; }
footer { font-size: 12px; color: #fff; }
footer span { display: inline-block; padding: 7px 13px; border-radius: 20px; background: #15464be6; }
@keyframes sea-drift { from { transform: scale(1.008) translateX(-2px); } to { transform: scale(1.025) translateX(2px); } }
html[data-motion="paused"] .seascape img,
html[data-motion="hidden"] .seascape img { animation-play-state: paused; }
@media (min-width: 701px) and (max-width: 1050px) {
  .page { padding: 28px; }
  .navigation { width: 48%; }
  h1 { font-size: 36px; }
  .links button { padding-inline: 18px; }
}
@media (max-width: 700px) {
  .seascape { position: absolute; height: 560px; }
  .seascape img { object-position: 27% top; }
  .seascape::after { background: linear-gradient(180deg, transparent 43%, #d3f0ee12 53%, #d3f0ee 100%); }
  .page { padding: 18px 20px 22px; }
  main { padding: 230px 0 24px; display: block; }
  .navigation { width: 100%; max-width: none; }
  .heading { padding: 0 0 21px; }
  .theme { margin-bottom: 7px; }
  h1 { font-size: 32px; }
  .intro { font-size: 12px; margin-top: 7px; line-height: 1.7; }
  .links { gap: 10px; }
  .links button { min-height: 56px; padding: 13px 18px; font-size: 16px; gap: 14px; }
  footer { text-align: right; }
}
@media (max-width: 350px) {
  .page { padding-inline: 16px; }
  main { padding-top: 215px; }
  h1 { font-size: 30px; }
  .identity { gap: 7px; padding-right: 12px; }
  .links button { min-height: 54px; }
}