/* =====================================================
   买菜比价本 · 首页落地页样式
   与主应用同风格(绿色系 / 毛玻璃 / 大圆角)
   ===================================================== */
:root{
  --green:#2f9e44; --green-d:#238338; --green-dd:#1c6b2f;
  --green-l:#e6f4ea;
  --orange:#e8590c;
  --ink:#2b332c; --muted:#6f7669; --line:#e6e9df;
  --bg:#f5f6f0; --card:#fff;
  --radius:20px;
  --shadow:0 1px 2px rgba(26,42,30,.05), 0 12px 32px -12px rgba(26,42,30,.16);
  --shadow-hover:0 2px 4px rgba(26,42,30,.06), 0 22px 48px -16px rgba(26,42,30,.24);
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:var(--bg); color:var(--ink);
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Segoe UI",sans-serif;
  font-size:16px; line-height:1.7;
}
a{text-decoration:none;color:inherit}
b{font-weight:800}
h1,h2,h3{margin:0;letter-spacing:-.3px}

/* ===== Hero ===== */
.hero{
  position:relative; overflow:hidden;
  background:linear-gradient(120deg,#145c26 0%,#2f9e44 48%,#45bf5c 100%);
  color:#fff;
}
.hero::before,.hero::after{
  content:""; position:absolute; border-radius:50%; pointer-events:none;
}
.hero::before{width:520px;height:520px;right:-140px;top:-180px;background:rgba(255,255,255,.10)}
.hero::after{width:420px;height:420px;left:-120px;bottom:-230px;background:rgba(255,255,255,.07)}
.hero-inner{
  position:relative; z-index:1;
  padding:22px clamp(18px,4vw,64px) 60px;
}
.hero-nav{
  display:flex; align-items:center; gap:26px;
  max-width:1200px; margin:0 auto;
  flex-wrap:wrap;
}
.nav-logo{font-size:19px;font-weight:800;letter-spacing:.3px;margin-right:auto}
.nav-link{font-size:14.5px;opacity:.88;transition:opacity .15s}
.nav-link:hover{opacity:1}
.nav-start{
  font-size:14.5px;font-weight:700;
  background:rgba(255,255,255,.16); border:1px solid rgba(255,255,255,.32);
  padding:8px 20px;border-radius:999px;transition:background .15s;
}
.nav-start:hover{background:rgba(255,255,255,.26)}

.hero-main{max-width:1200px;margin:0 auto;padding:64px 0 30px}
.hero-badge{
  display:inline-block;font-size:13.5px;font-weight:700;letter-spacing:.5px;
  background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.3);
  padding:6px 16px;border-radius:999px;margin-bottom:20px;
}
.hero h1{
  font-size:clamp(40px,6.5vw,72px);font-weight:900;line-height:1.12;
  text-shadow:0 2px 24px rgba(0,0,0,.12);
}
.hero h1 .hl{color:#ffe8b3;position:relative}
.hero-sub{
  margin:22px 0 0;max-width:600px;font-size:clamp(15px,1.6vw,18px);
  opacity:.96;
}
.hero-sub b{color:#fff;background:rgba(255,255,255,.14);padding:0 6px;border-radius:6px}
.hero-actions{display:flex;gap:14px;margin-top:34px;flex-wrap:wrap}
.btn-cta{
  display:inline-block;font-size:16.5px;font-weight:800;color:#145c26;
  background:#fff;padding:15px 34px;border-radius:999px;
  box-shadow:0 10px 30px -8px rgba(0,0,0,.28);
  transition:transform .15s,box-shadow .15s;
}
.btn-cta:hover{transform:translateY(-2px);box-shadow:0 16px 38px -8px rgba(0,0,0,.32)}
.btn-ghost{
  display:inline-block;font-size:15.5px;font-weight:600;color:#fff;
  border:1.5px solid rgba(255,255,255,.5);padding:14px 28px;border-radius:999px;
  transition:background .15s;
}
.btn-ghost:hover{background:rgba(255,255,255,.16)}
.hero-stat{margin-top:26px;font-size:14px;opacity:.85}
.hero-stat::before{content:"· ";opacity:.6}

/* ===== Hero 浮动小卡 ===== */
.hero-cards{
  position:relative; z-index:1;
  max-width:1200px;margin:0 auto;padding:0 clamp(18px,4vw,64px) 44px;
  display:grid;grid-template-columns:repeat(3,1fr);gap:18px;
}
.mini-card{
  display:flex;align-items:center;gap:14px;
  background:rgba(255,255,255,.13);border:1px solid rgba(255,255,255,.24);
  backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
  border-radius:16px;padding:18px 22px;font-size:14.5px;opacity:.95;
}
.mini-card b{font-size:15.5px}
.mc-icon{font-size:26px;line-height:1}

/* ===== 通用区块 ===== */
main{max-width:1200px;margin:0 auto;padding:0 clamp(18px,4vw,64px)}
.sec{padding:70px 0 30px}
.sec h2{font-size:clamp(24px,3vw,34px);font-weight:900;text-align:center}
.sec h2 b{color:var(--green-d)}
.sec-sub{text-align:center;color:var(--muted);margin:10px auto 40px;max-width:560px;font-size:15.5px}
.sec-tint{background:#eef3ea;border-radius:28px;margin:40px 0;padding:70px 40px 50px}

/* ===== 功能卡片 ===== */
.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.feat{
  background:var(--card);border:1px solid #edf0e7;border-radius:var(--radius);
  padding:28px 26px;box-shadow:var(--shadow);
  transition:transform .18s,box-shadow .18s;
}
.feat:hover{transform:translateY(-5px);box-shadow:var(--shadow-hover)}
.feat-ico{
  width:54px;height:54px;border-radius:15px;font-size:26px;
  display:flex;align-items:center;justify-content:center;margin-bottom:16px;
}
.feat h3{font-size:18px;font-weight:800;margin-bottom:8px}
.feat p{font-size:14.5px;color:var(--muted);margin:0}

/* ===== 步骤 ===== */
.steps{display:flex;align-items:stretch;gap:0;justify-content:center;flex-wrap:wrap}
.step{flex:1 1 240px;max-width:280px;text-align:center;padding:10px 18px}
.step-num{
  width:52px;height:52px;margin:0 auto 16px;border-radius:50%;
  background:var(--green-grad,linear-gradient(135deg,#2f9e44,#40c057));color:#fff;
  font-size:22px;font-weight:800;display:flex;align-items:center;justify-content:center;
  box-shadow:0 8px 20px -6px rgba(47,158,68,.5);
}
.step h3{font-size:17px;font-weight:800;margin-bottom:8px}
.step p{font-size:14px;color:var(--muted);margin:0}
.step-arrow{
  font-size:26px;color:#b9c4ae;font-weight:700;
  display:flex;align-items:center;padding:0 8px;
}

/* ===== 关于 ===== */
.about-wrap{max-width:760px;margin:0 auto;text-align:center}
.about-wrap p{font-size:16px;color:#4a5248;margin:0 0 16px}
.about-wrap p b{color:var(--green-dd)}
.about-points{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-top:26px}
.about-points span{
  background:#fff;border:1px solid #e4e9df;border-radius:999px;
  padding:9px 18px;font-size:14px;font-weight:600;color:#3d463d;
  box-shadow:var(--shadow);
}

/* ===== CTA ===== */
.cta{
  margin:70px 0 30px;border-radius:28px;text-align:center;
  background:linear-gradient(120deg,#1c6b2f,#3aa956);
  color:#fff;padding:64px 30px;
  position:relative;overflow:hidden;
}
.cta::before{content:"";position:absolute;width:300px;height:300px;right:-90px;top:-120px;border-radius:50%;background:rgba(255,255,255,.12)}
.cta h2{font-size:clamp(26px,3.4vw,38px);font-weight:900}
.cta p{opacity:.92;margin:10px 0 30px;font-size:16px}
.btn-big{font-size:18px;padding:18px 44px}

/* ===== 页脚 ===== */
.footer{text-align:center;padding:36px 16px 44px;color:var(--muted);font-size:13.5px}

/* ===== 响应式 ===== */
@media (max-width:900px){
  .feature-grid{grid-template-columns:1fr 1fr}
  .hero-cards{grid-template-columns:1fr}
}
@media (max-width:640px){
  .feature-grid{grid-template-columns:1fr}
  .hero-nav{gap:14px}
  .nav-link{display:none}
  .hero-main{padding-top:40px}
  .steps{flex-direction:column;align-items:center}
  .step-arrow{transform:rotate(90deg);padding:6px 0}
  .sec{padding:48px 0 20px}
  .sec-tint{padding:50px 20px 34px}
}