:root {
  color-scheme: light;
  --ink: #26302a;
  --muted: #667068;
  --green: #607c55;
  --green-dark: #40583a;
  --cream: #f8f4e9;
  --paper: #fffdf7;
  --line: #dfdfd4;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  color: var(--ink);
  background: linear-gradient(150deg, #f5efdf 0%, #eef3e8 100%);
  font-family: Inter, "Noto Sans TC", "Noto Sans SC", "Noto Sans JP",
    "Noto Sans KR", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  line-height: 1.7;
}

header {
  border-bottom: 1px solid rgba(64, 88, 58, .15);
  background: rgba(255, 253, 247, .88);
  backdrop-filter: blur(12px);
}

.nav, main, footer {
  width: min(880px, calc(100% - 36px));
  margin: 0 auto;
}

.nav {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand {
  color: var(--green-dark);
  font-size: 22px;
  font-weight: 850;
  letter-spacing: .02em;
  text-decoration: none;
}

.links { display: flex; flex-wrap: wrap; gap: 16px; }
.links a { color: var(--green-dark); font-weight: 700; text-decoration: none; }
.links a:hover { text-decoration: underline; }

main {
  margin-top: 42px;
  margin-bottom: 42px;
  padding: clamp(24px, 5vw, 54px);
  border: 1px solid rgba(64, 88, 58, .13);
  border-radius: 28px;
  background: rgba(255, 253, 247, .94);
  box-shadow: 0 18px 60px rgba(54, 63, 48, .09);
}

h1 { margin: 0 0 8px; font-size: clamp(32px, 6vw, 52px); line-height: 1.15; }
h2 { margin: 34px 0 8px; color: var(--green-dark); font-size: 20px; }
p { margin: 8px 0; }
.meta { color: var(--muted); }
.intro { margin-top: 24px; font-size: 17px; }
.contact {
  margin-top: 34px;
  padding: 18px 20px;
  border-radius: 18px;
  background: #edf3e8;
}
.contact a { color: var(--green-dark); font-weight: 800; }

.language-note {
  margin: 24px 0 0;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
}

footer { padding: 0 0 40px; color: var(--muted); font-size: 14px; }

.action-card { max-width: 620px; text-align: center; }
.action-card h1 { font-size: clamp(28px, 6vw, 42px); }
.action-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 20px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: #edf3e8;
  color: var(--green-dark);
  font-size: 30px;
  font-weight: 800;
}
.action-form { margin-top: 24px; text-align: left; }
.action-form label { display: block; margin: 14px 0 6px; font-weight: 750; }
.action-form input {
  width: 100%;
  padding: 13px 14px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: white;
  color: var(--ink);
  font: inherit;
}
.button {
  display: inline-block;
  margin-top: 22px;
  padding: 12px 22px;
  border: 0;
  border-radius: 999px;
  background: var(--green);
  color: white;
  font: inherit;
  font-weight: 800;
  cursor: pointer;
  text-decoration: none;
}
.button:disabled { cursor: wait; opacity: .65; }
.error { color: #9b3f35; }

@media (max-width: 600px) {
  .nav { align-items: flex-start; flex-direction: column; padding: 16px 0; }
  main { margin-top: 20px; border-radius: 20px; }
}