/* 合同小记 · 官网首页样式
   单文件、无外部依赖（微信内置浏览器可直接渲染） */

:root{
  --ink:#16201b;
  --ink-2:#4a554e;
  --muted:#7b857e;
  --line:#e2e7e3;
  --bg:#f7f8f6;
  --card:#ffffff;
  --green:#106b4a;
  --green-dark:#0b4f36;
  --band:#eff3ef;
}

*{box-sizing:border-box}

html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
}

body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB",
              "Microsoft YaHei","Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  font-size:16px;
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
}

img{max-width:100%;height:auto;border:0}
a{color:var(--green);text-decoration:none}
a:hover{text-decoration:underline}
p{margin:0}
ul,ol,dl{margin:0;padding:0;list-style:none}

.wrap{
  width:100%;
  max-width:900px;
  margin:0 auto;
  padding:0 24px;
}

.muted{color:var(--muted)}

/* ---------- 页头 ---------- */

.site-head{
  border-bottom:1px solid var(--line);
  background:rgba(247,248,246,.92);
  position:sticky;
  top:0;
  z-index:10;
  backdrop-filter:saturate(180%) blur(8px);
}

.head-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  height:64px;
}

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

.brand-mark{width:30px;height:30px;flex:0 0 30px}

.brand-name{
  font-size:17px;
  font-weight:650;
  letter-spacing:.01em;
}

.head-note{
  font-size:13px;
  color:var(--muted);
  border:1px solid var(--line);
  border-radius:999px;
  padding:3px 12px;
}

/* ---------- 首屏 ---------- */

.hero{
  display:grid;
  grid-template-columns:1.35fr .8fr;
  gap:56px;
  align-items:center;
  padding-top:76px;
  padding-bottom:84px;
}

.eyebrow{
  font-size:13px;
  letter-spacing:.14em;
  color:var(--green);
  margin-bottom:18px;
}

.hero h1{
  margin:0 0 22px;
  font-size:clamp(32px,4.8vw,46px);
  line-height:1.2;
  font-weight:700;
  letter-spacing:-.015em;
}

.lede{
  font-size:16.5px;
  line-height:1.9;
  color:var(--ink-2);
  max-width:33em;
}

.hero-actions{
  display:flex;
  align-items:center;
  gap:18px;
  flex-wrap:wrap;
  margin-top:32px;
}

.btn-primary{
  display:inline-block;
  background:var(--green);
  color:#fff;
  font-size:15px;
  font-weight:600;
  padding:12px 24px;
  border-radius:10px;
  transition:background .18s ease;
}
.btn-primary:hover{background:var(--green-dark);text-decoration:none}

.hero-fine{font-size:13px;color:var(--muted)}

/* 小程序码卡片 */

.qr-card{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:18px;
  padding:24px 22px 22px;
  text-align:center;
  box-shadow:0 1px 2px rgba(22,32,27,.04),0 12px 28px -18px rgba(22,32,27,.25);
}

.qr-card img{
  display:block;
  width:170px;
  margin:0 auto 16px;
  border-radius:10px;
}

.qr-title{
  font-size:15px;
  font-weight:650;
}

.qr-sub{
  font-size:13px;
  color:var(--muted);
  margin-top:4px;
}
.qr-sub strong{color:var(--ink-2);font-weight:600}

/* ---------- 通栏区块 ---------- */

.band{
  background:var(--band);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
  padding:64px 0;
}

.sec{padding:64px 0}

.sec-title{
  font-size:21px;
  font-weight:650;
  letter-spacing:-.01em;
  margin:0 0 28px;
  padding-left:14px;
  position:relative;
}
.sec-title::before{
  content:"";
  position:absolute;
  left:0;
  top:.34em;
  width:3px;
  height:.92em;
  background:var(--green);
  border-radius:2px;
}

/* 三步 */

.steps{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:32px;
}

.steps li{
  border-top:2px solid var(--green);
  padding-top:18px;
}

.step-no{
  display:block;
  font-size:12px;
  letter-spacing:.16em;
  color:var(--green);
  margin-bottom:8px;
  font-variant-numeric:tabular-nums;
}

.steps h3{
  font-size:16.5px;
  font-weight:650;
  margin:0 0 8px;
}

.steps p{
  font-size:14.5px;
  line-height:1.85;
  color:var(--ink-2);
}

/* 条款标签 */

.chips{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
}

.chips li{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:999px;
  padding:8px 16px;
  font-size:14.5px;
  color:var(--ink-2);
}

.sec-foot{
  margin-top:22px;
  font-size:14.5px;
  line-height:1.8;
  color:var(--muted);
}

/* 做什么 / 不做什么 */

.two-col{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:20px;
}

.panel{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:14px;
  padding:24px 26px;
}

.panel h3{
  font-size:15px;
  font-weight:650;
  margin:0 0 14px;
  letter-spacing:.02em;
}

.panel-do{border-left:3px solid var(--green)}
.panel-dont{border-left:3px solid #b07b45}

.panel li{
  position:relative;
  padding-left:16px;
  font-size:14.5px;
  line-height:1.85;
  color:var(--ink-2);
  margin-bottom:6px;
}
.panel li:last-child{margin-bottom:0}
.panel li::before{
  content:"";
  position:absolute;
  left:0;
  top:.72em;
  width:5px;
  height:5px;
  border-radius:50%;
  background:currentColor;
  opacity:.32;
}

/* 数据处理 */

.facts{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:28px;
}

.facts > div{
  border-top:1px solid var(--line);
  padding-top:16px;
}

.facts dt{
  font-size:14.5px;
  font-weight:650;
  margin-bottom:6px;
}

.facts dd{
  margin:0;
  font-size:14.5px;
  line-height:1.8;
  color:var(--ink-2);
}

/* 免责声明 */

.disclaimer{
  background:#fffdf7;
  border:1px solid #ece4d2;
  border-radius:14px;
  padding:24px 26px;
}

.disclaimer h2{
  font-size:15px;
  font-weight:650;
  margin:0 0 10px;
}

.disclaimer p{
  font-size:14.5px;
  line-height:1.85;
  color:var(--ink-2);
}

.disclaimer .muted{
  margin-top:10px;
  font-size:13.5px;
  color:var(--muted);
}

/* ---------- 页脚 ---------- */

.site-foot{
  border-top:1px solid var(--line);
  padding:36px 0 44px;
  background:var(--bg);
}

.foot-inner{
  display:flex;
  justify-content:space-between;
  align-items:flex-start;
  gap:24px;
  flex-wrap:wrap;
  font-size:13.5px;
  color:var(--muted);
}

.foot-brand{
  font-size:15px;
  font-weight:650;
  color:var(--ink);
  margin-bottom:2px;
}

.foot-right{text-align:right}
.foot-right p{margin-bottom:4px}
.foot-right a{color:var(--muted)}
.foot-right a:hover{color:var(--green)}

/* 公安联网备案号：图标须在编号之前，且编号可点击（平台硬要求） */
.beian-police a{display:inline-flex;align-items:center;gap:5px}
.beian-icon{height:15px;width:auto;vertical-align:middle;display:inline-block}

/* ---------- 响应式 ---------- */

@media (max-width:820px){
  .hero{
    grid-template-columns:1fr;
    gap:36px;
    padding-top:52px;
    padding-bottom:56px;
  }
  .qr-card{order:2;max-width:320px}
  .steps{grid-template-columns:1fr;gap:26px}
  .facts{grid-template-columns:1fr;gap:20px}
  .two-col{grid-template-columns:1fr}
  .band,.sec{padding:48px 0}
}

@media (max-width:520px){
  .wrap{padding:0 18px}
  .head-note{display:none}
  .hero-fine{width:100%}
  .foot-inner{flex-direction:column}
  .foot-right{text-align:left}
}