:root {
  --green: #5fa87f;
  --green-dark: #2f6b4b;
  --green-light: #eaf6ee;
  --mint: #d9efe3;
  --text: #2f3b34;
  --muted: #6f8378;
  --bg: #f7fcfa;
  --card: #ffffff;
  --border: #dcebe2;
  --warn-bg: #fff8e5;
  --warn-border: #ecc55c;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  background: var(--bg); color: var(--text); line-height: 1.75;
}
.container { max-width: 1000px; margin: 0 auto; padding: 0 20px; }

.navbar {
  background: rgba(255,255,255,.95); border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 100; box-shadow: 0 1px 6px rgba(0,0,0,.04);
  backdrop-filter: blur(6px);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; flex-wrap: wrap; }
.logo { font-size: 19px; font-weight: 700; color: var(--green-dark); text-decoration: none; display: flex; align-items: center; gap: 8px; }
.logo .icon { font-size: 24px; }
.nav-links { display: flex; gap: 6px; flex-wrap: wrap; }
.nav-links a {
  text-decoration: none; color: var(--muted); padding: 8px 16px; border-radius: 20px;
  font-size: 15px; transition: all .2s;
}
.nav-links a:hover { background: var(--green-light); color: var(--green-dark); }
.nav-links a.active { background: var(--green); color: #fff; font-weight: 600; }

.disclaimer {
  background: var(--warn-bg); border: 1px solid var(--warn-border);
  color: #87691b; border-radius: 12px; padding: 11px 16px; font-size: 14px;
  margin: 16px 0; display: flex; gap: 8px; align-items: flex-start;
}
.disclaimer b { font-weight: 700; }

.hero {
  background: linear-gradient(135deg, #eaf6ee 0%, #d9efe3 100%);
  border-radius: 20px; padding: 54px 40px; text-align: center; margin: 26px 0 30px;
}
.hero h1 { font-size: 32px; color: var(--green-dark); margin-bottom: 14px; letter-spacing: .5px; }
.hero p.sub { font-size: 16px; color: #567061; max-width: 670px; margin: 0 auto 26px; }
.cta-row { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.btn {
  display: inline-block; padding: 12px 28px; border-radius: 26px; text-decoration: none;
  font-size: 16px; font-weight: 600; transition: all .2s; border: none; cursor: pointer;
}
.btn-primary { background: var(--green); color: #fff; }
.btn-primary:hover { background: var(--green-dark); transform: translateY(-2px); }
.btn-outline { background: #fff; color: var(--green-dark); border: 2px solid var(--green); }
.btn-outline:hover { background: var(--green-light); transform: translateY(-2px); }

.card {
  background: var(--card); border: 1px solid var(--border); border-radius: 16px;
  padding: 26px 28px; margin-bottom: 20px;
}
.card h2 { font-size: 21px; color: var(--green-dark); margin-bottom: 12px; }
.page-title { font-size: 28px; color: var(--green-dark); margin: 30px 0 6px; }
.page-sub { color: var(--muted); margin-bottom: 22px; }

.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 18px; margin: 20px 0; }
.feature { background: #fff; border: 1px solid var(--border); border-radius: 16px; padding: 26px; transition: all .2s; text-decoration: none; display: block; }
.feature:hover { transform: translateY(-4px); box-shadow: 0 10px 24px rgba(95,168,127,.16); }
.feature .icon { font-size: 34px; margin-bottom: 10px; }
.feature h3 { font-size: 18px; color: var(--green-dark); margin-bottom: 8px; }
.feature p { font-size: 14px; color: var(--muted); }

.form-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 16px; margin-bottom: 8px; }
.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group label { font-size: 13px; color: var(--muted); font-weight: 600; }
select, input[type="number"], input[type="text"] {
  padding: 11px 14px; border: 1px solid var(--border); border-radius: 10px; font-size: 15px;
  background: #fff; color: var(--text);
}
select:focus, input:focus { outline: none; border-color: var(--green); box-shadow: 0 0 0 3px rgba(95,168,127,.12); }
.go-btn {
  background: var(--green); color: #fff; font-size: 16px; padding: 13px 40px;
  border-radius: 26px; border: none; cursor: pointer; font-weight: 700; margin-top: 6px;
}
.go-btn:hover { background: var(--green-dark); }

.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 12px; margin: 16px 0; }
.stat { background: var(--green-light); border-radius: 14px; padding: 18px; text-align: center; }
.stat .num { font-size: 25px; font-weight: 700; color: var(--green-dark); }
.stat .label { font-size: 13px; color: var(--muted); }

table { width: 100%; border-collapse: collapse; margin: 14px 0; font-size: 14px; }
th, td { padding: 10px 12px; text-align: left; border-bottom: 1px solid var(--border); vertical-align: top; }
th { background: var(--green-light); color: var(--green-dark); font-weight: 600; }
tr:nth-child(even) td { background: #fbfefc; }

.tag { display: inline-block; padding: 3px 12px; border-radius: 14px; font-size: 13px; font-weight: 600; }
.tag-good { background: #e3f3e9; color: #2f6b4b; }
.tag-warn { background: var(--warn-bg); color: #87691b; }
.tag-bad { background: #fdecec; color: #c0392b; }

.role-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin: 20px 0; }
@media (max-width: 700px) { .role-grid { grid-template-columns: 1fr; } }
.role-card { border-radius: 16px; padding: 26px; }
.role-ai { background: linear-gradient(135deg, #eef4ff, #e1eafd); border: 1px solid #c9d7f2; }
.role-human { background: linear-gradient(135deg, #eef9f0, #dcf1e2); border: 1px solid #b6dfc5; }
.role-card h3 { font-size: 19px; margin-bottom: 12px; }
.role-ai h3 { color: #3d5ba8; }
.role-human h3 { color: #2f6b4b; }
.role-card ul { padding-left: 20px; }
.role-card li { margin-bottom: 8px; font-size: 15px; }

.flow { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; justify-content: center; margin: 24px 0; }
.flow .step { background: #fff; border: 2px solid var(--green); border-radius: 14px; padding: 14px 18px; font-size: 14px; text-align: center; max-width: 210px; }
.flow .arrow { color: var(--green); font-size: 22px; font-weight: 700; }

.sim-banner {
  background: #ffecec; border: 2px dashed #e07a7a; border-radius: 12px;
  padding: 14px 18px; margin: 18px 0; text-align: center;
}
.sim-banner .t1 { color: #c0392b; font-weight: 800; font-size: 18px; }
.sim-banner .t2 { font-size: 13px; color: #a26262; }

section.info-block { margin-bottom: 20px; }
section.info-block h4 { color: var(--green-dark); font-size: 16px; margin-bottom: 8px; }
section.info-block ul { padding-left: 22px; }
section.info-block li { margin-bottom: 5px; font-size: 15px; }

footer { text-align: center; color: var(--muted); font-size: 13px; padding: 30px 0 40px; }
.hidden { display: none; }
a { color: var(--green-dark); }