:root {
  color-scheme: light;
  --ink: #12344b;
  --muted: #627687;
  --background: #f0f5f9;
  --line: #dce6ed;
  font-family: "Segoe UI", "Microsoft YaHei", "PingFang SC", sans-serif;
  font-synthesis: none;
}

* { box-sizing: border-box; }
html { min-width: 280px; scroll-padding-top: 24px; }
body { margin: 0; background: var(--background); color: var(--ink); -webkit-font-smoothing: antialiased; }
a { color: inherit; }
svg { display: block; flex: 0 0 auto; }
.page-shell { max-width: 1120px; padding: 0 48px; margin: 0 auto; }
.skip-link { position: absolute; top: 8px; left: 8px; z-index: 5; padding: 12px 18px; background: white; border-radius: 8px; transform: translateY(-160%); }
.skip-link:focus { transform: translateY(0); }
a:focus-visible { outline: 3px solid #126eac; outline-offset: 5px; }

.site-header { display: flex; align-items: center; justify-content: space-between; padding: 27px 0; gap: 16px; }
.brand { display: inline-flex; align-items: center; gap: 12px; font-size: 18px; font-weight: 700; text-decoration: none; border-radius: 8px; }
.brand-mark { width: 36px; height: 36px; color: var(--ink); }
.header-note { color: var(--muted); font-size: 13px; }

.welcome { position: relative; display: grid; grid-template-columns: 1.2fr 1fr; align-items: center; min-height: 288px; padding: 36px 44px; background: var(--ink); color: white; border-radius: 24px 24px 64px 24px; overflow: hidden; }
.welcome-copy { position: relative; z-index: 1; }
.welcome-label { display: flex; align-items: center; gap: 9px; margin: 0 0 18px; color: #c0d5e1; font-size: 12px; letter-spacing: .06em; }
.welcome-label > span { width: 6px; height: 6px; border-radius: 50%; background: #72dfc6; }
h1 { margin: 0; font-size: clamp(29px, 3.5vw, 42px); font-weight: 650; letter-spacing: .025em; line-height: 1.4; }
.welcome-description { margin: 19px 0 0; color: #bdcfdc; font-size: 14px; line-height: 1.9; }
.route-art { align-self: stretch; display: flex; flex-direction: column; align-items: center; justify-content: center; margin: -12px -20px -12px 12px; }
.route-art svg { width: 100%; max-width: 350px; }
.route-art > span { color: #b3cbd8; font-size: 11px; letter-spacing: .16em; margin-top: -9px; }

.projects { margin-top: 35px; }
.section-heading { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-bottom: 17px; }
.section-heading h2 { display: flex; align-items: center; gap: 10px; font-size: 18px; line-height: 1.5; margin: 0; font-weight: 700; }
.section-heading h2 > span { display: inline-flex; justify-content: center; align-items: center; min-width: 24px; height: 23px; background: #e0eaf0; color: #526c7e; font-size: 12px; font-weight: 600; border-radius: 7px; }
.section-heading p { display: flex; align-items: center; gap: 7px; margin: 0; color: var(--muted); font-size: 12px; }
.section-heading p svg { width: 14px; height: 14px; }
.project-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.project-card { --accent: #087d80; --tint: #e5f4f1; position: relative; display: block; padding: 25px 26px 21px; background: white; border: 1px solid var(--line); border-radius: 16px; text-decoration: none; transition: border-color 160ms ease, box-shadow 160ms ease; }
.project-card::before { content: ""; position: absolute; top: 28px; left: -1px; width: 3px; height: 34px; background: var(--accent); border-radius: 0 2px 2px 0; }
.night { --accent: #4059b9; --tint: #edf0fc; }
.day { --accent: #986522; --tint: #fbf2e2; }
.evaluation { --accent: #6c5197; --tint: #f2edf8; }
.card-top { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.project-icon { display: inline-flex; align-items: center; justify-content: center; width: 46px; height: 46px; color: var(--accent); background: var(--tint); border-radius: 13px; }
.project-icon svg { width: 28px; height: 28px; }
.category { color: var(--muted); font-size: 11px; border: 1px solid #e5ebf0; border-radius: 5px; padding: 3px 8px; line-height: 1.4; }
.project-card h3 { font-size: 23px; line-height: 1.4; margin: 17px 0 7px; letter-spacing: .02em; font-weight: 650; }
.project-description { color: var(--muted); font-size: 13px; line-height: 1.7; margin: 0; }
.card-bottom { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-top: 22px; padding-top: 17px; border-top: 1px solid #edf1f5; }
.destination { color: #6d8090; font-size: 10px; line-height: 1.6; overflow-wrap: anywhere; }
.open-project { flex: 0 0 auto; display: inline-flex; align-items: center; gap: 6px; color: var(--accent); font-size: 12px; font-weight: 650; }
.open-project svg { width: 17px; height: 17px; }
.project-card:focus-visible { border-color: var(--accent); }

.usage-note { display: flex; align-items: flex-start; justify-content: center; gap: 9px; margin: 26px 0 33px; color: #5c7485; }
.usage-note > svg { width: 16px; height: 16px; margin-top: 2px; }
.usage-note p { margin: 0; font-size: 12px; line-height: 1.8; }
.usage-note p > span { margin-left: 10px; color: #6b7e8d; }
.site-footer { display: flex; justify-content: space-between; gap: 12px; padding: 20px 0 24px; border-top: 1px solid var(--line); color: #6b7e8d; font-size: 11px; }
.site-footer > span:first-child { color: #50697b; font-weight: 600; }

@media (hover: hover) {
  .project-card:hover { border-color: var(--accent); box-shadow: 0 5px 18px #173c5510; }
  .project-card:hover .open-project { text-decoration: underline; text-underline-offset: 4px; }
}
@media (min-width: 1440px) {
  .page-shell { max-width: 1200px; }
  .site-header { padding: 34px 0; }
  .welcome { min-height: 310px; }
  .project-card { padding: 27px 30px 23px; }
}
@media (max-width: 760px) {
  .page-shell { padding: 0 24px; }
  .welcome { padding: 30px; grid-template-columns: 1.4fr 1fr; border-radius: 20px 20px 44px 20px; min-height: 265px; }
  .route-art { margin-right: -50px; margin-left: 0; }
  .route-art > span { display: none; }
  .project-card { padding: 22px 20px 18px; }
  .card-bottom { align-items: flex-start; flex-direction: column; gap: 9px; margin-top: 18px; padding-top: 14px; }
  .project-description { font-size: 12px; }
}
@media (max-width: 540px) {
  .page-shell { padding: 0 20px; }
  .site-header { padding: 21px 0; }
  .brand { gap: 10px; font-size: 16px; }
  .brand-mark { width: 32px; height: 32px; }
  .header-note { font-size: 10px; }
  .welcome { display: block; padding: 28px 26px 29px; min-height: 0; border-radius: 18px 18px 42px 18px; }
  .welcome-label { margin-bottom: 15px; font-size: 11px; }
  h1 { font-size: 30px; line-height: 1.45; }
  .welcome-description { font-size: 12px; margin-top: 16px; }
  .route-art { display: none; }
  .projects { margin-top: 29px; }
  .section-heading { margin-bottom: 14px; gap: 8px; }
  .section-heading h2 { font-size: 16px; gap: 8px; }
  .section-heading p { font-size: 10px; gap: 5px; }
  .section-heading p svg { width: 12px; height: 12px; }
  .project-grid { grid-template-columns: minmax(0, 1fr); gap: 13px; }
  .project-card { padding: 21px 22px 18px; }
  .project-card h3 { font-size: 22px; margin-top: 14px; }
  .project-description { font-size: 13px; }
  .card-bottom { flex-direction: row; align-items: center; margin-top: 19px; gap: 8px; }
  .destination { font-size: 9px; }
  .open-project { font-size: 11px; gap: 4px; }
  .open-project svg { width: 15px; height: 15px; }
  .usage-note { justify-content: flex-start; margin: 23px 3px 26px; }
  .usage-note p { font-size: 11px; }
  .usage-note p > span { display: block; margin: 2px 0 0; }
  .site-footer { padding: 18px 0 22px; font-size: 10px; }
}
@media (max-width: 350px) {
  .page-shell { padding: 0 14px; }
  .header-note { display: none; }
  .welcome { padding: 25px 22px; }
  h1 { font-size: 27px; }
  .project-card { padding-right: 19px; padding-left: 19px; }
  .card-bottom { align-items: flex-start; flex-direction: column; gap: 8px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; scroll-behavior: auto !important; }
}
@media (forced-colors: active) {
  .project-card, .welcome, .project-icon { border: 1px solid CanvasText; }
  .project-card::before { background: LinkText; }
}