:root{
  --red:#8b1111;
  --red-dark:#650a0a;
  --ink:#201d1a;
  --body:#4b4540;
  --muted:#8a817a;
  --line:#e6e0d9;
  --bg:#fbf9f6;
  --card:#ffffff;
  --warm:#f4ede4;
}
*{margin:0;padding:0;box-sizing:border-box;}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  background:var(--bg);
  color:var(--body);
  line-height:1.75;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
h1,h2,h3,h4{color:var(--ink);line-height:1.35;font-weight:700;}
h2{font-size:1.7rem;}
h3{font-size:1.15rem;}
.wrap{max-width:1120px;margin:0 auto;padding:0 22px;}
section{padding:64px 0;}
.eyebrow{
  display:inline-block;font-size:.78rem;letter-spacing:.14em;
  color:var(--red);font-weight:700;margin-bottom:10px;
}
.lead{max-width:720px;margin-bottom:34px;color:var(--body);}

/* 顶栏 */
.topbar{
  position:sticky;top:0;z-index:50;
  background:rgba(251,249,246,.94);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
}
.topbar-in{
  display:flex;align-items:center;justify-content:space-between;
  height:66px;
}
.brand{display:flex;align-items:center;gap:10px;}
.brand img{height:32px;width:auto;}
.brand b{font-size:1.15rem;color:var(--red);letter-spacing:.01em;}
.brand small{display:block;font-size:.68rem;color:var(--muted);font-weight:400;letter-spacing:.08em;}
.nav{display:flex;gap:26px;list-style:none;font-size:.92rem;}
.nav a{color:var(--ink);}
.nav a:hover{color:var(--red);}
.top-cta{
  background:var(--red);color:#fff;padding:9px 18px;border-radius:4px;
  font-size:.9rem;font-weight:600;
}
.top-cta:hover{background:var(--red-dark);}

/* 首屏 */
.hero{
  background:linear-gradient(180deg,#fff 0%,var(--warm) 100%);
  border-bottom:1px solid var(--line);
  padding:56px 0 60px;
}
.hero-grid{
  display:grid;grid-template-columns:1.15fr .85fr;gap:44px;align-items:center;
}
.hero h1{font-size:2.5rem;letter-spacing:-.01em;margin-bottom:18px;}
.hero h1 em{font-style:normal;color:var(--red);}
.hero p.sub{font-size:1.05rem;margin-bottom:16px;max-width:520px;}
.hero .notice{
  border-left:4px solid var(--red);
  background:#fff;
  padding:14px 18px;border-radius:0 4px 4px 0;
  font-size:.93rem;color:var(--body);
  margin-bottom:26px;max-width:540px;
  box-shadow:0 1px 4px rgba(0,0,0,.04);
}
.btns{display:flex;gap:12px;flex-wrap:wrap;}
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  padding:13px 26px;border-radius:4px;font-weight:600;font-size:.95rem;
  transition:background .2s,color .2s,transform .2s,border-color .2s;
  border:1px solid transparent;
}
.btn-main{background:var(--red);color:#fff;}
.btn-main:hover{background:var(--red-dark);transform:translateY(-2px);}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--line);}
.btn-ghost:hover{border-color:var(--red);color:var(--red);}
.hero-figure{
  background:#fff;border:1px solid var(--line);border-radius:8px;
  padding:12px;box-shadow:0 14px 34px rgba(90,30,20,.10);
  transform:rotate(-1.2deg);
}
.hero-figure img{border-radius:4px;width:100%;height:auto;}

/* 三条卖点 */
.points{
  display:grid;grid-template-columns:repeat(3,1fr);gap:20px;
  background:transparent;
}
.point{
  background:var(--card);border:1px solid var(--line);border-radius:8px;
  padding:26px 24px;transition:transform .2s,box-shadow .2s;
}
.point:hover{transform:translateY(-4px);box-shadow:0 10px 26px rgba(90,30,20,.08);}
.point .num{
  display:inline-flex;width:30px;height:30px;border-radius:50%;
  background:var(--warm);color:var(--red);font-weight:700;font-size:.9rem;
  align-items:center;justify-content:center;margin-bottom:14px;
}
.point h3{margin-bottom:8px;}
.point p{font-size:.94rem;}

/* 图文交错 */
.split{
  display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;
  margin-bottom:56px;
}
.split:last-child{margin-bottom:0;}
.split.rev .split-text{order:2;}
.split-text h3{font-size:1.35rem;margin-bottom:12px;}
.split-text p{margin-bottom:12px;}
.split-text ul{list-style:none;margin-top:10px;}
.split-text li{
  position:relative;padding-left:20px;margin-bottom:9px;font-size:.95rem;
}
.split-text li::before{
  content:"";position:absolute;left:0;top:.62em;width:7px;height:7px;
  border-radius:50%;background:var(--red);
}
.shot{
  background:#fff;border:1px solid var(--line);border-radius:8px;padding:10px;
  box-shadow:0 10px 26px rgba(90,30,20,.07);
}
.shot img{width:100%;height:auto;border-radius:3px;}

/* 安全提示 */
.safety{
  background:var(--warm);border-top:1px solid var(--line);border-bottom:1px solid var(--line);
}
.safety-box{
  background:#fff;border:1px solid #eadfd2;border-left:6px solid var(--red);
  border-radius:6px;padding:28px 30px;max-width:880px;
}
.safety-box h2{font-size:1.4rem;margin-bottom:12px;}
.safety-box p{font-size:.95rem;margin-bottom:10px;}
.safety-box p:last-child{margin-bottom:0;}

/* 步骤 */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;}
.step{
  background:var(--card);border:1px solid var(--line);border-radius:8px;
  padding:26px 24px;position:relative;
}
.step .tag{
  display:inline-block;background:var(--red);color:#fff;font-size:.72rem;
  font-weight:700;letter-spacing:.08em;padding:3px 10px;border-radius:11px;
  margin-bottom:14px;
}
.step h3{margin-bottom:8px;font-size:1.1rem;}
.step p{font-size:.93rem;}

/* 截图墙 */
.wall{
  display:grid;grid-template-columns:repeat(4,1fr);gap:16px;
}
.wall figure{
  background:#fff;border:1px solid var(--line);border-radius:6px;
  padding:8px;transition:transform .2s,box-shadow .2s;
}
.wall figure:hover{transform:translateY(-3px);box-shadow:0 8px 20px rgba(90,30,20,.08);}
.wall figure.tall{grid-row:span 2;}
.wall img{width:100%;height:auto;border-radius:3px;}

/* 问答 */
.faq{display:grid;grid-template-columns:1fr 1fr;gap:20px;}
.faq-item{
  background:var(--card);border:1px solid var(--line);border-radius:8px;
  padding:24px 26px;
}
.faq-item h4{font-size:1.02rem;margin-bottom:8px;color:var(--red-dark);}
.faq-item p{font-size:.93rem;}

/* 下载区 */
.download{
  background:#2a2020;color:#f2ece6;text-align:center;
}
.download h2{color:#fff;font-size:1.9rem;margin-bottom:14px;}
.download p{
  color:#cfc3ba;max-width:620px;margin:0 auto 26px;font-size:1rem;
}
.download .btn-main{background:var(--red);}
.download .btn-main:hover{background:#a51717;}

/* 页脚 */
footer{
  background:var(--bg);border-top:1px solid var(--line);
  padding:34px 0 30px;font-size:.82rem;color:var(--muted);
}
.foot-in{display:flex;flex-wrap:wrap;gap:14px;justify-content:space-between;align-items:center;}
.foot-in p{max-width:640px;}
.foot-in a{color:var(--muted);}
.foot-in a:hover{color:var(--red);}
.foot-time{font-size:.78rem;color:#a39a92;}

/* 响应式 */
@media (max-width:1024px){
  .hero-grid{grid-template-columns:1fr;gap:30px;}
  .hero-figure{transform:none;max-width:520px;}
  .wall{grid-template-columns:repeat(3,1fr);}
  .split{gap:30px;}
}
@media (max-width:768px){
  section{padding:44px 0;}
  .hero h1{font-size:1.85rem;}
  .nav{display:none;}
  .points,.steps,.faq{grid-template-columns:1fr;}
  .split,.split.rev{grid-template-columns:1fr;}
  .split.rev .split-text{order:0;}
  .wall{grid-template-columns:repeat(2,1fr);}
  .wall figure.tall{grid-row:span 1;}
  h2{font-size:1.4rem;}
  .hero{padding:38px 0 44px;}
  .top-cta{padding:7px 13px;font-size:.82rem;}
}