/* === 春好 Chunhao — CSS === */
:root {
  --green: #7BA23F;
  --green-h: #6B8F37;
  --dark: #1a1a2e;
  --cream: #FAF8F5;
  --white: #fff;
  --text: #333;
  --muted: #777;
  --border: #e8e5e0;
  --radius: 10px;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
  color: var(--text); background: var(--cream); line-height: 1.7; font-size: 1.05rem;
  -webkit-font-smoothing: antialiased;
}

.container { max-width: 900px; margin: 0 auto; padding: 0 1.5rem; }

/* ---- Nav ---- */
.nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(250,248,245,0.94); backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.nav .container { display:flex; align-items:center; justify-content:space-between; padding:0.8rem 1.5rem; }
.nav-logo { text-decoration:none; display:flex; align-items:baseline; gap:0.3rem; }
.nav-logo .zh { font-size:1.2rem; font-weight:700; color:var(--green); letter-spacing:2px; }
.nav-logo .en { font-size:0.6rem; color:var(--green); letter-spacing:3px; opacity:0.6; }
.nav-links { display:flex; gap:0.15rem; align-items:center; }
.nav-links a {
  padding:0.35rem 0.7rem; border-radius:6px; font-size:0.92rem;
  color:var(--muted); text-decoration:none; transition:0.15s;
}
.nav-links a:hover { color:var(--text); background:rgba(0,0,0,0.03); }
.nav-cta { background:var(--green) !important; color:#fff !important; font-weight:600; margin-left:0.3rem; }
.nav-cta:hover { background:var(--green-h) !important; color:#fff !important; }

/* ---- Hero ---- */
.hero {
  background: var(--white); color:var(--text); text-align:center; padding:5rem 1.5rem 4.5rem;
  border-bottom: 1px solid var(--border);
}
.hero h1 {
  font-size:2.3rem; font-weight:700; line-height:1.5; margin-bottom:1.2rem;
  max-width:780px; margin-left:auto; margin-right:auto; color:var(--dark);
  letter-spacing:0.02em;
}
.hero .sub {
  font-size:1.05rem; opacity:0.7; max-width:580px; margin:0 auto 2rem; line-height:1.75; color:var(--text);
}
.hero .btn {
  display:inline-flex; align-items:center; gap:0.5rem;
  background:var(--green); color:#fff; padding:0.8rem 2.2rem;
  border-radius:8px; font-size:1.05rem; font-weight:600; text-decoration:none;
  transition:background 0.15s;
}
.hero .btn:hover { background:var(--green-h); }
.hero .btn svg { width:1rem; height:1rem; }

/* ---- Sections ---- */
section { padding:4rem 0; }
section.light { background:var(--white); }

.sec-title { text-align:center; font-size:1.7rem; font-weight:700; margin-bottom:0.5rem; color:var(--dark); }
.sec-sub { text-align:center; font-size:0.98rem; color:var(--muted); margin-bottom:2.5rem; max-width:500px; margin-left:auto; margin-right:auto; }

/* ---- Text block ---- */
.prose { max-width:680px; margin:0 auto; font-size:1rem; line-height:1.85; color:#555; }
.prose p { margin-bottom:1rem; }

/* ---- Card Grid ---- */
.cards { display:grid; gap:1rem; }
.cards.col2 { grid-template-columns:1fr 1fr; }
.cards.col3 { grid-template-columns:1fr 1fr 1fr; }
.cards.col5 { grid-template-columns:repeat(5,1fr); }
@media (max-width:768px) { .cards.col2,.cards.col3,.cards.col5 { grid-template-columns:1fr 1fr; } }
@media (max-width:480px) { .cards.col2,.cards.col3,.cards.col5 { grid-template-columns:1fr; } }

.card {
  background:var(--white); border-radius:var(--radius); padding:1.5rem 1.25rem;
  text-align:center; box-shadow:0 1px 6px rgba(0,0,0,0.04); border:1px solid var(--border);
}
.card .icon { margin-bottom:0.8rem; }
.card .icon svg { width:1.75rem; height:1.75rem; }
.card h3 { font-size:1.05rem; margin-bottom:0.3rem; color:var(--dark); }
.card p { font-size:0.85rem; color:var(--muted); line-height:1.45; }

/* ---- Steps ---- */
.steps { display:grid; grid-template-columns:1fr 1fr 1fr; gap:1.25rem; }
@media (max-width:768px) { .steps { grid-template-columns:1fr; } }

.step {
  background:var(--white); border-radius:var(--radius); padding:2rem 1.5rem;
  box-shadow:0 1px 6px rgba(0,0,0,0.04); border:1px solid var(--border); position:relative;
}
.step .num {
  font-size:2.5rem; font-weight:800; color:var(--green); opacity:0.15;
  position:absolute; top:0.3rem; right:0.8rem; line-height:1;
}
.step h3 { font-size:1.05rem; margin-bottom:0.5rem; color:var(--dark); }
.step p { font-size:0.85rem; color:var(--muted); line-height:1.6; }

/* ---- Contact ---- */
.contact-row { display:grid; grid-template-columns:2fr 1fr 1fr; gap:1.5rem; align-items:start; }
@media (max-width:768px) { .contact-row { grid-template-columns:1fr; } }

.form { display:flex; flex-direction:column; gap:0.7rem; }
.form label { font-size:0.82rem; font-weight:600; color:var(--text); }
.form input {
  padding:0.6rem 0.75rem; border-radius:6px; border:1px solid var(--border);
  font-size:0.88rem; background:var(--white);
}
.form input:focus { outline:none; border-color:var(--green); box-shadow:0 0 0 2px rgba(123,162,63,0.12); }
.form button {
  margin-top:0.3rem; padding:0.7rem; border:none; border-radius:6px;
  background:var(--green); color:#fff; font-size:0.92rem; font-weight:600; cursor:pointer;
}
.form button:hover { background:var(--green-h); }
.form-status { font-size:0.8rem; min-height:1.2rem; }

.contact-side { text-align:center; padding:1.5rem 0.5rem; }
.contact-side .icon svg { width:2rem; height:2rem; stroke:var(--green); }
.contact-side h3 { font-size:0.95rem; margin:0.5rem 0 0.2rem; color:var(--dark); }
.contact-side p, .contact-side a { font-size:0.82rem; color:var(--muted); text-decoration:none; }
.contact-wechat .wechat-id { font-weight:600; color:var(--green); letter-spacing:0.5px; }
.contact-wechat .wechat-qr {
  display:block; margin:0.6rem auto 0.4rem; width:min(200px, 70vw); height:auto;
  border-radius:8px; box-shadow:0 2px 12px rgba(0,0,0,0.08);
}
.contact-wechat .wechat-qr {
  display:block; margin:0.5rem auto 0.35rem; max-width:200px; width:100%; height:auto;
  border-radius:8px; box-shadow:0 2px 12px rgba(0,0,0,0.08);
}

/* ---- Footer ---- */
.footer {
  background:var(--dark); color:rgba(255,255,255,0.6); padding:2.5rem 0; font-size:0.82rem;
}
.footer .container { display:flex; justify-content:space-between; align-items:center; flex-wrap:wrap; gap:1rem; }
.footer-logo { display:flex; align-items:baseline; gap:0.3rem; margin-bottom:0.2rem; }
.footer-logo .zh { font-size:1rem; color:var(--green); font-weight:600; letter-spacing:2px; }
.footer-logo .en { font-size:0.55rem; color:var(--green); letter-spacing:3px; opacity:0.5; }
.footer a { color:rgba(255,255,255,0.5); text-decoration:none; }
.footer a:hover { color:#fff; }
.footer .tagline { opacity:0.5; }
.footer-bot { margin-top:1.5rem; padding-top:1rem; text-align:center; font-size:0.72rem; opacity:0.3; }