:root {
  font-family: Inter, "Microsoft YaHei", "PingFang SC", system-ui, sans-serif;
  color: #173f3a;
  background: #eef3f1;
  font-synthesis: none;
}

* { box-sizing: border-box; }
body { min-width: 320px; min-height: 100vh; margin: 0; background: radial-gradient(circle at 15% 10%, #fff 0, #f5f8f7 38%, #e8efed 100%); }
.portal-shell { width: min(1120px, calc(100% - 40px)); margin: 0 auto; padding: 72px 0 48px; }
.portal-header { display: grid; grid-template-columns: 76px 1fr; gap: 24px; align-items: center; max-width: 760px; }
.brand-mark { width: 76px; height: 76px; display: grid; place-items: center; border-radius: 20px; background: #173f3a; color: white; font-size: 28px; font-weight: 900; box-shadow: 0 14px 30px rgba(23, 63, 58, .22); }
.eyebrow { margin: 0 0 7px; color: #b52a3d; font-size: 11px; font-weight: 800; letter-spacing: .16em; }
h1 { margin: 0; color: #102f2b; font-size: clamp(32px, 5vw, 54px); letter-spacing: -.04em; }
.intro { max-width: 680px; margin: 12px 0 0; color: #60736f; font-size: 15px; line-height: 1.75; }
.tool-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; margin-top: 48px; }
.tool-card { min-height: 260px; display: flex; flex-direction: column; justify-content: space-between; padding: 25px; border: 1px solid rgba(23, 63, 58, .13); border-radius: 20px; background: rgba(255, 255, 255, .9); color: inherit; text-decoration: none; box-shadow: 0 12px 30px rgba(23, 63, 58, .08); transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease; }
.tool-card:hover { transform: translateY(-4px); border-color: rgba(23, 63, 58, .32); box-shadow: 0 18px 38px rgba(23, 63, 58, .14); }
.tool-code { width: 48px; height: 48px; display: grid; place-items: center; border-radius: 14px; background: #173f3a; color: white; font-size: 15px; font-weight: 900; letter-spacing: .06em; }
.tool-card--proforma .tool-code { background: #c91d32; }
.tool-card--packing .tool-code { background: #455c57; }
.tool-card h2 { margin: 26px 0 8px; color: #173f3a; font-size: 24px; }
.tool-card p { margin: 0; color: #6d7d79; font-size: 13px; line-height: 1.7; }
.tool-card strong { color: #b52a3d; font-size: 13px; }
.local-note { display: flex; gap: 14px; align-items: baseline; margin-top: 22px; padding: 16px 18px; border: 1px solid #d8e1df; border-radius: 13px; background: rgba(255, 255, 255, .72); color: #687975; font-size: 12px; line-height: 1.6; }
.local-note strong { flex: 0 0 auto; color: #294b46; }

@media (max-width: 780px) {
  .portal-shell { width: min(100% - 28px, 600px); padding-top: 36px; }
  .portal-header { grid-template-columns: 58px 1fr; gap: 16px; }
  .brand-mark { width: 58px; height: 58px; border-radius: 16px; font-size: 21px; }
  .tool-grid { grid-template-columns: 1fr; margin-top: 32px; }
  .tool-card { min-height: 210px; }
  .local-note { align-items: flex-start; flex-direction: column; gap: 5px; }
}