:root {
  --primary: #07c160;
  --primary-dark: #06ad56;
  --primary-light: #e7f9ee;
  --ink: #1a1a1a;
  --muted: #6b7280;
  --bg: #ffffff;
  --bg-alt: #f6f8f7;
  --border: #e8ebee;
  --radius: 16px;
  --shadow: 0 8px 30px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 20px 60px rgba(7, 193, 96, 0.18);
  --maxw: 1140px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  color: var(--ink); background: var(--bg); line-height: 1.6; -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4, h5 { line-height: 1.25; }

/* ---------- 导航 ---------- */
.nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255, 255, 255, 0.85); backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid transparent; transition: border-color .3s, box-shadow .3s;
}
.nav.scrolled { border-color: var(--border); box-shadow: 0 2px 12px rgba(0,0,0,.04); }
.nav-inner { max-width: var(--maxw); margin: 0 auto; padding: 14px 24px; display: flex; align-items: center; justify-content: space-between; }
.brand { display: flex; align-items: center; gap: 8px; font-weight: 700; font-size: 19px; }
.brand-logo { font-size: 22px; }
.brand-name { color: var(--ink); }
.nav-links { display: flex; align-items: center; gap: 28px; }
.nav-links a { color: #374151; font-size: 15px; font-weight: 500; transition: color .2s; }
.nav-links a:hover { color: var(--primary); }
.nav-cta {
  background: var(--primary); color: #fff !important; padding: 9px 18px; border-radius: 999px;
  font-weight: 600; box-shadow: 0 4px 14px rgba(7,193,96,.3); transition: transform .2s, background .2s;
}
.nav-cta:hover { background: var(--primary-dark); transform: translateY(-1px); }
.nav-toggle { display: none; background: none; border: none; font-size: 24px; cursor: pointer; color: var(--ink); }

/* ---------- Hero ---------- */
.hero { position: relative; overflow: hidden; }
.hero-bg {
  position: absolute; inset: 0;
  background:
    radial-gradient(900px 500px at 80% -10%, rgba(7,193,96,.16), transparent 60%),
    radial-gradient(700px 400px at 0% 10%, rgba(16,173,122,.12), transparent 55%);
}
.hero-inner {
  position: relative; max-width: var(--maxw); margin: 0 auto; padding: 70px 24px 90px;
  display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 40px; align-items: center;
}
.badge {
  display: inline-block; background: var(--primary-light); color: var(--primary-dark);
  font-size: 13px; font-weight: 600; padding: 6px 14px; border-radius: 999px; margin-bottom: 18px;
}
.hero-text h1 { font-size: clamp(34px, 5vw, 56px); font-weight: 800; letter-spacing: -1px; }
.hero-text h1 .hl { color: var(--primary); }
.hero-sub { margin: 18px 0 28px; font-size: 17px; color: var(--muted); max-width: 520px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.btn { display: inline-block; padding: 13px 26px; border-radius: 999px; font-weight: 600; font-size: 15px; transition: transform .2s, box-shadow .2s, background .2s; cursor: pointer; }
.btn-primary { background: var(--primary); color: #fff; box-shadow: 0 8px 22px rgba(7,193,96,.32); }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); }
.btn-ghost { background: #fff; color: var(--ink); border: 1px solid var(--border); }
.btn-ghost:hover { border-color: var(--primary); color: var(--primary); }
.btn-lg { padding: 16px 36px; font-size: 17px; }
.hero-stats { display: flex; gap: 34px; margin-top: 40px; }
.hero-stats div { display: flex; flex-direction: column; }
.hero-stats strong { font-size: 26px; font-weight: 800; color: var(--primary); }
.hero-stats span { font-size: 13px; color: var(--muted); }

/* 手机模拟 */
.hero-visual { display: flex; justify-content: center; }
.phone {
  width: 260px; height: 520px; background: #111; border-radius: 38px; padding: 12px;
  box-shadow: var(--shadow-lg); position: relative;
}
.phone-notch { position: absolute; top: 14px; left: 50%; transform: translateX(-50%); width: 90px; height: 22px; background: #111; border-radius: 0 0 14px 14px; z-index: 2; }
.phone-screen { width: 100%; height: 100%; background: #f2f3f5; border-radius: 28px; overflow: hidden; display: flex; flex-direction: column; }
.ps-bar { background: #ededed; text-align: center; padding: 28px 0 8px; font-size: 15px; font-weight: 600; color: #1a1a1a; }
.wx-msg { display: flex; gap: 10px; padding: 16px 14px; }
.wx-avatar { width: 40px; height: 40px; border-radius: 8px; background: #fff; display: flex; align-items: center; justify-content: center; font-size: 22px; flex-shrink: 0; }
.wx-bubble { background: #fff; border-radius: 10px; padding: 10px 12px; font-size: 13px; box-shadow: 0 1px 4px rgba(0,0,0,.05); }
.wx-title { font-weight: 700; color: #07c160; margin-bottom: 4px; font-size: 13px; }
.wx-line { color: #333; line-height: 1.5; }

/* ---------- 通用区块 ---------- */
.section { max-width: var(--maxw); margin: 0 auto; padding: 80px 24px; }
.section-alt { background: var(--bg-alt); max-width: none; }
.section-alt > * { max-width: var(--maxw); margin-left: auto; margin-right: auto; }
.section-head { text-align: center; margin-bottom: 50px; }
.section-head h2 { font-size: clamp(26px, 3.4vw, 38px); font-weight: 800; }
.section-head p { margin-top: 12px; color: var(--muted); font-size: 16px; }

.grid { display: grid; gap: 22px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-5 { grid-template-columns: repeat(5, 1fr); }

.card { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 28px 24px; box-shadow: var(--shadow); transition: transform .25s, box-shadow .25s; }
.card:hover { transform: translateY(-4px); box-shadow: 0 14px 40px rgba(0,0,0,.09); }
.card-icon { font-size: 30px; width: 56px; height: 56px; border-radius: 14px; background: var(--primary-light); display: flex; align-items: center; justify-content: center; margin-bottom: 16px; }
.card h3 { font-size: 18px; margin-bottom: 8px; }
.card p { color: var(--muted); font-size: 14.5px; }

.type-card { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 26px 16px; text-align: center; box-shadow: var(--shadow); transition: transform .25s, border-color .25s; }
.type-card:hover { transform: translateY(-4px); border-color: var(--primary); }
.type-icon { font-size: 34px; margin-bottom: 10px; }
.type-card h4 { font-size: 16px; margin-bottom: 6px; }
.type-card p { color: var(--muted); font-size: 13px; }

/* 关注公众号 */
.follow { display: grid; grid-template-columns: 260px 1fr; gap: 44px; align-items: center; max-width: 880px; margin: 0 auto; }
.follow-qr { text-align: center; }
.follow-qr img { width: 220px; height: 220px; object-fit: contain; border: 1px solid var(--border); border-radius: 16px; padding: 10px; background: #fff; box-shadow: var(--shadow); }
.follow-qr .tip { margin-top: 14px; font-size: 13px; color: var(--muted); }
.follow-steps { list-style: none; display: flex; flex-direction: column; gap: 18px; }
.follow-steps li { padding-left: 16px; border-left: 3px solid var(--primary); }
.follow-steps strong { display: block; font-size: 16px; color: var(--primary-dark); margin-bottom: 4px; }
.follow-steps span { color: var(--muted); font-size: 14.5px; }

/* 步骤 */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.step { text-align: center; padding: 30px 18px; background: #fff; border-radius: var(--radius); border: 1px solid var(--border); box-shadow: var(--shadow); }
.step-num { width: 48px; height: 48px; border-radius: 50%; background: var(--primary); color: #fff; font-weight: 800; font-size: 20px; display: flex; align-items: center; justify-content: center; margin: 0 auto 14px; }
.step h4 { font-size: 17px; margin-bottom: 6px; }
.step p { color: var(--muted); font-size: 14px; }

/* 为何选择 */
.why { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.why-item { background: #fff; border-radius: var(--radius); padding: 26px 22px; border: 1px solid var(--border); box-shadow: var(--shadow); }
.why-item strong { display: block; font-size: 17px; color: var(--primary-dark); margin-bottom: 8px; }
.why-item span { color: var(--muted); font-size: 14px; }

/* CTA */
.cta { text-align: center; padding: 90px 24px; background: linear-gradient(135deg, #07c160, #10ad7a); color: #fff; }
.cta h2 { font-size: clamp(24px, 3.4vw, 36px); font-weight: 800; }
.cta p { margin: 14px 0 30px; opacity: .92; font-size: 16px; }
.cta .btn-primary { background: #fff; color: var(--primary-dark); box-shadow: 0 10px 30px rgba(0,0,0,.18); }
.cta .btn-primary:hover { background: #f2fff7; }

/* 页脚 */
.footer { background: #0f1419; color: #c7cdd4; padding: 56px 24px 28px; }
.footer-inner { max-width: var(--maxw); margin: 0 auto; display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 30px; }
.footer-brand .brand-name { color: #fff; font-size: 19px; font-weight: 700; }
.footer-brand .brand-logo { font-size: 22px; }
.footer-brand p { margin-top: 12px; font-size: 14px; color: #8a94a0; max-width: 320px; }
.footer-col h5 { color: #fff; font-size: 15px; margin-bottom: 14px; }
.footer-col a { display: block; font-size: 14px; color: #9aa3ad; padding: 5px 0; transition: color .2s; }
.footer-col a:hover { color: var(--primary); }
.footer-bottom { max-width: var(--maxw); margin: 36px auto 0; padding-top: 22px; border-top: 1px solid #232a31; font-size: 13px; color: #6b7480; text-align: center; }

/* ---------- 响应式 ---------- */
@media (max-width: 980px) {
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .grid-5 { grid-template-columns: repeat(3, 1fr); }
  .why { grid-template-columns: repeat(2, 1fr); }
  .footer-inner { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 760px) {
  .nav-toggle { display: block; }
  .nav-links {
    position: absolute; top: 100%; left: 0; right: 0; background: #fff;
    flex-direction: column; align-items: stretch; gap: 0; padding: 8px 0;
    border-bottom: 1px solid var(--border); box-shadow: 0 12px 24px rgba(0,0,0,.06);
    max-height: 0; overflow: hidden; transition: max-height .3s ease;
  }
  .nav-links.open { max-height: 420px; }
  .nav-links a { padding: 13px 24px; }
  .nav-cta { margin: 8px 24px; text-align: center; }
  .hero-inner { grid-template-columns: 1fr; padding: 48px 20px 64px; text-align: center; }
  .hero-sub { margin-left: auto; margin-right: auto; }
  .hero-actions, .hero-stats { justify-content: center; }
  .hero-visual { margin-top: 20px; }
  .section { padding: 56px 20px; }
  .grid-3, .grid-5, .why { grid-template-columns: 1fr; }
  .follow { grid-template-columns: 1fr; gap: 24px; }
  .follow-qr img { width: 180px; height: 180px; }
  .footer-inner { grid-template-columns: 1fr; gap: 24px; }
}