:root{
  --bg:#ffffff;
  --fg:#111111;
  --muted:#5a5a5a;

  --card:#ffffff;
  --card2:#f7f8fa;
  --line:#e7e7e7;

  --primary:#c30d23;

  /* 统一字号体系 */
  --fz-h1: clamp(36px, 5vw, 56px);
  --fz-h2: 22px;
  --fz-h3: 16px;
  --fz-h4: 16px;
  --fz-body: 14px;

  /* 标签高度（避免盖字） */
  --tag-h: 28px;
}

*{box-sizing:border-box}
html,body{margin:0;padding:0;overflow:hidden;}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"PingFang SC","Microsoft YaHei",sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  color:var(--fg);
  background:var(--bg);
}

/* ===== Hero ===== */
.hero{
  width:100vw;
  margin-left:calc(50% - 50vw);
  padding:92px 20px 64px;
  background:
    radial-gradient(900px 260px at 50% 0%, rgba(195,13,35,.08), transparent 55%),
    #fff;
  border-bottom:1px solid #eee;
  text-align:center;
}
.hero__inner{max-width:1100px;margin:0 auto;}

.hero__title{
  margin:0 0 16px;
  font-size:var(--fz-h1);
  font-weight:900;
  letter-spacing:.02em;
}

.hero__subtitle{
  margin:0 0 16px;
  font-size:20px;
  font-weight:650;
  color:#333;
}

.hero__sub{
  margin:0 auto 18px;
  max-width:900px;
  color:var(--muted);
  line-height:1.85;
  font-size:15px;
}
.hero__sub strong{color:var(--fg);font-weight:900;}

.pillrow{
  display:flex;
  justify-content:center;
  gap:10px;
  flex-wrap:wrap;
  margin-top:10px;
}
.pill{
  display:inline-flex;
  align-items:center;
  padding:8px 12px;
  border:1px solid rgba(195,13,35,.18);
  background:rgba(195,13,35,.06);
  color:rgba(17,17,17,.82);
  border-radius:999px;
  font-size:13px;
}

/* ===== 主体 ===== */
main{padding:26px 20px 10px;}
.section{max-width:1100px;margin:28px auto;}

.section__head{margin-bottom:14px;}
.section__title h2{
  margin:0 0 6px;
  font-size:var(--fz-h2);
  line-height:1.2;
  font-weight:900;
}
.section__desc{
  margin:0;
  color:var(--muted);
  line-height:1.75;
  font-size:var(--fz-body);
}

/* ===== 2×2 分组 ===== */
.groupGrid{
  display:grid;
  grid-template-columns:repeat(2, minmax(0, 1fr));
  gap:16px;
}
@media (max-width: 900px){
  .groupGrid{grid-template-columns:1fr;}
}

.group{
  border:1px solid var(--line);
  border-radius:16px;
  background:linear-gradient(180deg,#fff 0%, #fbfbfc 100%);
  padding:16px;
}
.group__head{
  margin-bottom:12px;
  padding-bottom:12px;
  border-bottom:1px dashed rgba(17,17,17,.12);
}
.group__title{
  margin:0 0 6px;
  font-size:var(--fz-h3);
  font-weight:900;
}
.group__desc{
  margin:0;
  color:var(--muted);
  line-height:1.7;
  font-size:13px;
}

/* 每组 2 张卡片 */
.cards2{
  display:grid;
  grid-template-columns:repeat(2, minmax(0, 1fr));
  gap:12px;
}
@media (max-width: 620px){
  .cards2{grid-template-columns:1fr;}
}

/* ===== Card（不遮挡、对齐、统一高度） ===== */
.card{
  position:relative;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:14px;

  /* 关键：顶部预留标签空间，彻底杜绝盖字 */
  padding: calc(14px + var(--tag-h) + 10px) 14px 12px;

  min-height: 148px;
}

.card__tag{
  position:absolute;
  left:12px;
  top:12px;
  height:var(--tag-h);
  display:inline-flex;
  align-items:center;
  padding:0 10px;
  border-radius:999px;
  border:1px solid rgba(17,17,17,.10);
  background:var(--card2);
  color:rgba(17,17,17,.70);
  font-size:12px;
  white-space:nowrap;
}

.card h4{
  margin:0 0 8px;
  font-size:var(--fz-h4);
  font-weight:900;
  line-height:1.25;
}
.card p{
  margin:0;
  color:var(--muted);
  line-height:1.7;
  font-size:var(--fz-body);
}

/* ===== CTA（浅灰双栏企业风） ===== */
.cta{
  width:100vw;
  margin-left:calc(50% - 50vw);
  padding:70px 20px;
  background:#f9f9fa;
  border-top:1px solid #eaeaea;
}

.cta__inner{
  max-width:1100px;
  margin:0 auto;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:40px;
}

.cta__content{max-width:640px;}
.cta__content h2{
  margin:0 0 12px;
  font-size:26px;
  font-weight:900;
  color:#111;
}
.cta__content p{
  margin:0;
  font-size:15px;
  line-height:1.8;
  color:#666;
}

.cta__actions{
  display:flex;
  gap:14px;
  flex-shrink:0;
}

/* 按钮 */
.btn{
  display:inline-block;
  padding:12px 24px;
  border-radius:8px;
  font-weight:700;
  text-decoration:none;
  transition:all .2s ease;
  font-size:14px;
}

.btn--primary{
  background:var(--primary);
  color:#fff;
  border:1px solid var(--primary);
}
.btn--primary:hover{
  background:#a70b1e;
  border-color:#a70b1e;
}

.btn:not(.btn--primary){
  background:#fff;
  color:#111;
  border:1px solid #ccc;
}
.btn:not(.btn--primary):hover{
  border-color:#999;
}

/* 移动端 */
@media (max-width: 768px){
  .cta__inner{
    flex-direction:column;
    text-align:center;
  }
  .cta__actions{justify-content:center;}
}