/* ===== 全局变量 ===== */
:root{
  --bg:#f5f8fb;
  --bg2:#fff;
  --ink:#172033;
  --muted:#6c788b;
  --rule:#e4eaf2;
  --accent:#3d7eff;
  --accent2:#20b9a8;
  --soft:#edf4ff;
  --soft2:#eafaf6;
  --shadow:0 18px 50px rgba(32,54,86,.10);
  --shadow2:0 10px 28px rgba(32,54,86,.08);
  --radius:24px;
  --radius-sm:16px;
}

/* ===== 基础重置 ===== */
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  color:var(--ink);
  background:radial-gradient(circle at 8% -10%,rgba(61,126,255,.13),transparent 34rem),
             radial-gradient(circle at 95% 5%,rgba(32,185,168,.13),transparent 32rem),
             linear-gradient(180deg,var(--bg),#eef4f8 100%);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei","PingFang SC",Arial,sans-serif;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
ul{list-style:none}

/* ===== 顶部导航 ===== */
.nav{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,.85);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--rule);
}
.nav-inner{
  max-width:1200px;margin:0 auto;
  padding:14px 28px;
  display:flex;align-items:center;justify-content:space-between;
}
.nav-logo{display:flex;align-items:center;gap:12px}
.logo-img{width:44px;height:44px;border-radius:12px;object-fit:contain}
.logo-text{
  font-size:22px;font-weight:900;letter-spacing:.02em;
  background:linear-gradient(135deg,var(--accent),var(--accent2));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.nav-menu{display:flex;gap:6px}
.nav-menu a{
  padding:8px 14px;border-radius:999px;
  color:var(--muted);font-size:14px;font-weight:700;
  transition:.18s;
}
.nav-menu a:hover{color:var(--accent);background:var(--soft)}

/* ===== 通用按钮 ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  min-height:46px;padding:0 24px;
  border-radius:999px;
  background:var(--bg2);border:1px solid var(--rule);
  font-weight:800;font-size:15px;
  transition:.2s;cursor:pointer;
}
.btn.primary{
  color:#fff;border:0;
  background:linear-gradient(135deg,var(--accent),var(--accent2));
  box-shadow:0 12px 26px rgba(61,126,255,.28);
}
.btn.primary:hover{transform:translateY(-2px);box-shadow:0 16px 32px rgba(61,126,255,.36)}
.btn:hover{transform:translateY(-1px);border-color:rgba(61,126,255,.4);color:var(--accent)}

/* ===== 通用区块标题 ===== */
.section-head{
  max-width:760px;margin:0 auto 36px;text-align:center;
}
.section-tag{
  display:inline-block;padding:5px 14px;
  color:var(--accent);background:var(--soft);
  border-radius:999px;font-size:13px;font-weight:800;
  margin-bottom:14px;
}
.section-tag.light{color:#fff;background:rgba(255,255,255,.22)}
.section-head h2{
  font-size:clamp(26px,4vw,40px);
  letter-spacing:-.02em;line-height:1.2;
}
.section-desc{
  margin-top:14px;color:var(--muted);font-size:16px;
}

/* ===== 首屏 ===== */
.hero{
  position:relative;overflow:hidden;
  padding:90px 28px 80px;
  max-width:1200px;margin:0 auto;
}
.hero-inner{max-width:680px;position:relative;z-index:2}
.badge{
  display:inline-flex;padding:7px 16px;
  color:var(--accent);background:var(--soft);
  border:1px solid var(--rule);border-radius:999px;
  font-size:13px;font-weight:800;
}
.hero h1{
  margin:22px 0 18px;
  font-size:clamp(38px,6vw,68px);
  line-height:1.05;letter-spacing:-.04em;font-weight:900;
}
.hero h1 .accent{
  background:linear-gradient(135deg,var(--accent),var(--accent2));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero p{
  max-width:560px;color:var(--muted);font-size:18px;line-height:1.7;
}
.hero-actions{
  display:flex;flex-wrap:wrap;gap:14px;margin-top:32px;
}
.hero-deco{
  position:absolute;right:-120px;top:-100px;width:460px;height:460px;
  border-radius:50%;
  background:linear-gradient(135deg,rgba(61,126,255,.18),rgba(32,185,168,.18));
  filter:blur(8px);
}
.hero-deco::after{
  content:"";position:absolute;inset:40px;border-radius:50%;
  background:radial-gradient(circle at 35% 35%,rgba(255,255,255,.5),transparent 60%);
}

/* ===== 数据亮点 ===== */
.stats{max-width:1200px;margin:0 auto;padding:0 28px 60px}
.stats-inner{
  display:grid;grid-template-columns:repeat(4,1fr);gap:18px;
  padding:32px;
  background:rgba(255,255,255,.86);
  border:1px solid var(--rule);
  border-radius:var(--radius);
  box-shadow:var(--shadow2);
  backdrop-filter:blur(12px);
}
.stat-item{text-align:center;padding:8px 4px}
.stat-item b{
  display:block;
  font-size:clamp(26px,3vw,38px);
  background:linear-gradient(135deg,var(--accent),var(--accent2));
  -webkit-background-clip:text;background-clip:text;color:transparent;
  font-weight:900;
}
.stat-item span{display:block;margin-top:6px;color:var(--muted);font-size:14px}

/* ===== 公司介绍 ===== */
.about{max-width:1200px;margin:0 auto;padding:60px 28px}
.about-body{
  display:grid;grid-template-columns:minmax(0,1.6fr) minmax(0,1fr);
  gap:32px;align-items:start;
}
.about-text p{margin-bottom:16px;color:var(--muted);font-size:16px;line-height:1.85}
.about-text strong{color:var(--ink);font-weight:800}
.about-card{
  padding:28px;
  background:linear-gradient(135deg,var(--soft),var(--soft2));
  border:1px solid var(--rule);
  border-radius:var(--radius);
}
.about-card-head{
  display:flex;align-items:center;gap:8px;
  font-size:16px;font-weight:900;margin-bottom:18px;
}
.dot{
  width:10px;height:10px;border-radius:50%;
  background:linear-gradient(135deg,var(--accent),var(--accent2));
}
.value-list li{
  padding:12px 0;border-bottom:1px dashed var(--rule);
  color:var(--muted);font-size:15px;
}
.value-list li:last-child{border-bottom:0}
.value-list b{
  display:inline-block;width:60px;
  color:var(--accent);font-weight:900;
}

/* ===== 业务介绍 ===== */
.business{max-width:1200px;margin:0 auto;padding:60px 28px}
.biz-grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:22px;
}
.biz-card{
  padding:30px;
  background:rgba(255,255,255,.86);
  border:1px solid var(--rule);
  border-radius:var(--radius);
  box-shadow:var(--shadow2);
  transition:.22s;
}
.biz-card:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.biz-card.highlight{
  background:linear-gradient(135deg,rgba(61,126,255,.06),rgba(32,185,168,.06));
  border-color:rgba(61,126,255,.3);
}
.biz-icon{
  width:56px;height:56px;border-radius:16px;
  display:flex;align-items:center;justify-content:center;
  color:#fff;font-weight:900;font-size:16px;
  margin-bottom:18px;
}
.biz-icon.user{background:linear-gradient(135deg,#3d7eff,#5b9dff)}
.biz-icon.master{background:linear-gradient(135deg,#20b9a8,#3dd9c4)}
.biz-icon.admin{background:linear-gradient(135deg,#7a6cff,#9b8eff)}
.biz-card h3{font-size:22px;margin-bottom:8px}
.biz-card > p{color:var(--muted);font-size:14px;margin-bottom:18px}
.biz-list li{
  position:relative;padding:8px 0 8px 22px;
  color:var(--ink);font-size:14px;
}
.biz-list li::before{
  content:"";position:absolute;left:0;top:14px;
  width:8px;height:8px;border-radius:50%;
  background:linear-gradient(135deg,var(--accent),var(--accent2));
}

/* ===== 流程 ===== */
.flow{
  margin-top:50px;padding:40px 32px;
  background:rgba(255,255,255,.86);
  border:1px solid var(--rule);
  border-radius:var(--radius);
  box-shadow:var(--shadow2);
}
.flow-title{
  text-align:center;font-size:24px;margin-bottom:28px;
}
.flow-steps{
  display:flex;align-items:center;justify-content:center;
  flex-wrap:wrap;gap:14px;
}
.flow-step{
  flex:1;min-width:160px;max-width:220px;
  text-align:center;padding:22px 16px;
  border:1px solid var(--rule);border-radius:var(--radius-sm);
  background:#fff;
}
.step-num{
  display:inline-flex;align-items:center;justify-content:center;
  width:38px;height:38px;border-radius:50%;
  color:#fff;font-weight:900;font-size:16px;
  background:linear-gradient(135deg,var(--accent),var(--accent2));
  margin-bottom:10px;
}
.flow-step b{display:block;font-size:16px;margin-bottom:4px}
.flow-step span{color:var(--muted);font-size:13px}
.flow-arrow{
  color:var(--accent);font-size:22px;font-weight:900;
}

/* ===== 服务范围 ===== */
.services{max-width:1200px;margin:0 auto;padding:60px 28px}
.service-grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:22px;
}
.service-item{
  padding:28px;
  background:rgba(255,255,255,.86);
  border:1px solid var(--rule);
  border-radius:var(--radius);
  box-shadow:var(--shadow2);
  text-align:center;
  transition:.22s;
}
.service-item:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.service-emoji{
  font-size:42px;margin-bottom:14px;
  width:80px;height:80px;border-radius:20px;
  display:inline-flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,var(--soft),var(--soft2));
}
.service-item h3{font-size:20px;margin-bottom:8px}
.service-item p{color:var(--muted);font-size:14px}

/* ===== 二维码 ===== */
.qrcode{
  margin:40px 0 0;padding:80px 28px;
  background:linear-gradient(135deg,var(--accent),var(--accent2));
  position:relative;overflow:hidden;
}
.qrcode::before{
  content:"";position:absolute;inset:0;
  background:radial-gradient(circle at 20% 20%,rgba(255,255,255,.16),transparent 40rem),
             radial-gradient(circle at 80% 90%,rgba(255,255,255,.12),transparent 38rem);
}
.qrcode-inner{
  position:relative;z-index:1;
  max-width:1100px;margin:0 auto;
  display:grid;grid-template-columns:1.3fr 1fr;
  gap:40px;align-items:center;
}
.qrcode-text h2{
  color:#fff;font-size:clamp(28px,4vw,42px);
  margin:14px 0 18px;letter-spacing:-.02em;
}
.qrcode-text p{
  color:rgba(255,255,255,.92);font-size:16px;line-height:1.8;
  margin-bottom:22px;max-width:440px;
}
.qr-features li{
  position:relative;padding:8px 0 8px 26px;
  color:#fff;font-size:15px;
}
.qr-features li::before{
  content:"✓";position:absolute;left:0;top:7px;
  width:18px;height:18px;border-radius:50%;
  background:rgba(255,255,255,.22);
  display:flex;align-items:center;justify-content:center;
  font-size:12px;font-weight:900;
}
.qrcode-card{
  background:#fff;padding:28px;
  border-radius:var(--radius);
  text-align:center;justify-self:center;
  box-shadow:0 24px 50px rgba(0,0,0,.18);
}
.qr-img{
  width:220px;height:220px;border-radius:16px;
  margin:0 auto 14px;
}
.qr-tip{color:var(--muted);font-size:14px;font-weight:700}

/* ===== 页脚 ===== */
.footer{
  background:#0f1729;color:rgba(255,255,255,.7);
  padding:60px 28px 24px;
}
.footer-inner{
  max-width:1200px;margin:0 auto;
  display:grid;grid-template-columns:1.5fr 1fr 1fr;
  gap:40px;padding-bottom:32px;
  border-bottom:1px solid rgba(255,255,255,.1);
}
.footer-col h4{color:#fff;font-size:17px;margin-bottom:14px}
.footer-col p{font-size:14px;line-height:1.7}
.footer-col a{
  display:block;padding:5px 0;font-size:14px;
  color:rgba(255,255,255,.7);cursor:default;
}
.footer-copy{
  text-align:center;padding-top:22px;
  font-size:13px;color:rgba(255,255,255,.5);
}
.footer-copy p{margin:4px 0}
.footer-copy .icp a{
  display:inline-block;color:rgba(255,255,255,.5);cursor:pointer;
  transition:.18s;
}
.footer-copy .icp a:hover{color:rgba(255,255,255,.85)}

/* ===== 响应式 ===== */
@media(max-width:980px){
  .stats-inner{grid-template-columns:repeat(2,1fr)}
  .about-body,.qrcode-inner{grid-template-columns:1fr}
  .biz-grid,.service-grid{grid-template-columns:repeat(2,1fr)}
  .qrcode-card{margin-top:20px}
}
@media(max-width:640px){
  .nav-menu{display:none}
  .hero{padding:60px 20px 50px}
  .stats,.about,.business,.services{padding-left:20px;padding-right:20px}
  .stats-inner,.flow{padding:22px 16px}
  .biz-grid,.service-grid{grid-template-columns:1fr}
  .footer-inner{grid-template-columns:1fr}
  .flow-step{min-width:140px}
}