:root {
  --ink: #1c1917;
  --muted: #57534e;
  --line: #e7e5e4;
  --bg: #fafaf9;
  --card: #ffffff;
  --forest: #14532d;
  --forest-soft: #dcfce7;
  --sand: #fffbeb;
  --sand-ink: #92400e;
  --sand-line: #fcd34d;
}

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

body {
  font-family: "IBM Plex Sans", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.7;
}

a { color: var(--forest); }
.wrap { max-width: 920px; margin: 0 auto; padding: 0 22px; }

.banner {
  background: var(--sand);
  color: var(--sand-ink);
  border-bottom: 1px solid var(--sand-line);
  text-align: center;
  font-size: 13px;
  font-weight: 700;
  padding: 11px 14px;
}

header {
  position: sticky;
  top: 0;
  z-index: 30;
  background: rgba(250, 250, 249, 0.94);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}

.nav {
  min-height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--ink);
}

.brand img { width: 34px; height: 34px; }
.brand strong { font-size: 18px; letter-spacing: -0.02em; }
.brand span { display: block; font-size: 11px; color: var(--muted); font-weight: 600; }

.links { display: flex; gap: 16px; align-items: center; flex-wrap: wrap; }
.links a {
  text-decoration: none;
  color: var(--muted);
  font-size: 14px;
  font-weight: 650;
}
.links a:hover { color: var(--forest); }

.menu {
  display: none;
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 10px;
  padding: 8px 12px;
  font-weight: 700;
  cursor: pointer;
}

.hero { padding: 54px 0 22px; }
.kicker {
  display: inline-block;
  background: var(--forest-soft);
  color: var(--forest);
  border-radius: 999px;
  padding: 6px 12px;
  font-size: 12px;
  font-weight: 800;
}
.hero h1 {
  margin: 14px 0 12px;
  font-size: clamp(30px, 5vw, 44px);
  line-height: 1.2;
  letter-spacing: -0.03em;
}
.lead { color: var(--muted); font-size: 17px; max-width: 700px; }

.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 22px; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 18px;
  border-radius: 12px;
  text-decoration: none;
  font-weight: 750;
  font-size: 14px;
  border: 1px solid transparent;
}
.btn-solid { background: var(--forest); color: #fff; }
.btn-solid:hover { background: #0f3d22; }
.btn-line { background: #fff; color: var(--ink); border-color: var(--line); }
.note { margin-top: 12px; font-size: 13px; color: var(--muted); }

section { padding: 30px 0; }
h2 { font-size: 24px; margin-bottom: 8px; letter-spacing: -0.02em; }
.sub { color: var(--muted); margin-bottom: 18px; max-width: 680px; }

.grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 18px;
}
.card h3 { font-size: 16px; margin-bottom: 8px; }
.card p { color: var(--muted); font-size: 14px; }

.stack { display: grid; gap: 10px; }
.row {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 16px 18px;
}
.row h3 { font-size: 16px; margin-bottom: 6px; }
.row p { color: var(--muted); font-size: 14px; }

.alert {
  margin-top: 14px;
  background: #fff1f2;
  border: 1px solid #fecdd3;
  color: #9f1239;
  border-radius: 14px;
  padding: 16px 18px;
  font-size: 14px;
}

.faq details {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 14px 16px;
  margin-bottom: 10px;
}
.faq summary { cursor: pointer; font-weight: 750; }
.faq p { margin-top: 8px; color: var(--muted); font-size: 14px; }

footer {
  margin-top: 36px;
  border-top: 1px solid var(--line);
  padding: 28px 0 42px;
  color: var(--muted);
  font-size: 13px;
}
.foot {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 18px;
}
footer a { color: var(--muted); text-decoration: none; }
footer a:hover { color: var(--forest); }
footer ul { list-style: none; display: grid; gap: 8px; margin-top: 8px; }
.copy { margin-top: 20px; padding-top: 16px; border-top: 1px solid var(--line); }

.legal-page { padding: 110px 0 70px; }
.legal-card {
  max-width: 760px;
  margin: 0 auto;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 34px;
}
.legal-card h1 { font-size: 32px; margin-bottom: 8px; }
.legal-meta { color: var(--muted); font-size: 14px; margin-bottom: 22px; }
.legal-card h2 { font-size: 20px; margin: 24px 0 10px; }
.legal-card p, .legal-card li { color: #44403c; margin-bottom: 10px; }
.legal-card ul { padding-left: 18px; }

@media (max-width: 760px) {
  .menu { display: inline-flex; }
  .links {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: flex-start;
    padding-bottom: 12px;
  }
  .links.open { display: flex; }
  .grid, .foot { grid-template-columns: 1fr; }
}