:root{
  --blue:#0A5FA0;
  --blue-d:#07456F;
  --blue-l:#EAF4FC;
  --yellow:#FFD400;
  --yellow-l:#FFF8D6;
  --ink:#17324A;
  --gray:#5F7385;
  --line:#DCE8F1;
  --tint:#F5FAFE;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  color:var(--ink);background:#fff;line-height:1.85;font-size:16px;
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{line-height:1.35;font-weight:800}
.wrap{width:100%;max-width:1120px;margin:0 auto;padding:0 26px}
.doc{max-width:840px;margin:0 auto}

/* ============ 顶栏 ============ */
.hd{
  position:sticky;top:0;z-index:90;background:#fff;
  border-bottom:3px solid var(--yellow);
}
.hd-in{display:flex;align-items:center;height:68px;gap:18px}
.hd-brand{display:flex;align-items:center;gap:10px;flex:none}
.hd-brand img{width:36px;height:36px;border-radius:8px}
.hd-brand b{font-size:17px;letter-spacing:.4px;color:var(--blue-d)}
.hd-nav{display:flex;gap:22px;margin-left:auto;font-size:13.5px;color:var(--gray);font-weight:600}
.hd-nav a:hover{color:var(--blue)}
.hd-cta{
  flex:none;background:var(--yellow);color:var(--blue-d);font-weight:800;font-size:13px;
  border-radius:8px;padding:9px 20px;box-shadow:0 2px 0 #D9A900;
}
.hd-cta:hover{background:#FFE24D}
.hd-menu{display:none;background:none;border:0;cursor:pointer;color:var(--blue-d);padding:4px}

/* ============ 英雄区 ============ */
.hero{
  position:relative;overflow:hidden;
  background:
    radial-gradient(620px 360px at 12% 0%,rgba(255,212,0,.20),transparent 66%),
    radial-gradient(560px 380px at 92% 26%,rgba(10,95,160,.16),transparent 70%),
    linear-gradient(180deg,#F2F9FF,#fff 72%);
  padding:56px 0 30px;
  text-align:center;
}
.hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(rgba(10,95,160,.13) 1px,transparent 1px);
  background-size:16px 16px;opacity:.55;
}
.hero-copy{position:relative}
.kick{
  display:inline-block;font-size:11px;letter-spacing:3px;color:var(--blue);
  border:1px solid #C9DFF1;background:#fff;border-radius:999px;padding:4px 14px;margin-bottom:16px;
}
.hero h1{font-size:58px;letter-spacing:-1px;color:var(--blue-d);margin-bottom:10px}
.hero h1 span{color:var(--blue);position:relative}
.hero h1 span::after{
  content:"";position:absolute;left:0;right:0;bottom:4px;height:10px;
  background:rgba(255,212,0,.55);z-index:-1;border-radius:2px;
}
.hero .lead{font-size:19px;font-weight:700;color:#0E6BA8;margin-bottom:14px}
.hero .desc{font-size:15px;color:#43596B;max-width:800px;margin:0 auto 26px;text-align:left}
.acts{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-bottom:40px}
.btn{
  display:inline-flex;align-items:center;gap:8px;
  background:var(--blue);color:#fff;padding:13px 30px;border-radius:8px;
  font-weight:800;font-size:15px;box-shadow:0 4px 0 #063A5C;
}
.btn svg{width:17px;height:17px}
.btn:hover{background:#0B6CB5}
.ghost{
  display:inline-flex;align-items:center;padding:12px 22px;border-radius:8px;
  border:1px solid #C9DFF1;background:#fff;color:var(--blue-d);font-size:14px;
}
.ghost:hover{border-color:var(--blue)}

/* 三机横排 */
.trio{position:relative;display:flex;justify-content:center;align-items:flex-end;gap:18px}
.ph{
  position:relative;border:7px solid #fff;border-radius:22px;overflow:hidden;
  box-shadow:0 20px 40px rgba(18,60,100,.20);background:#fff;
}
.ph::before{
  content:"";position:absolute;top:0;left:50%;transform:translateX(-50%);
  width:64px;height:12px;background:#fff;border-radius:0 0 8px 8px;z-index:2;
}
.ph img{width:100%;aspect-ratio:3/4;object-fit:cover}
.ph.mid{transform:translateY(-16px);z-index:2}
.ph.side{width:190px;opacity:.97}
.ph.mid{width:214px}
.ph-tag{
  position:absolute;z-index:3;background:var(--yellow);color:var(--blue-d);
  font-size:11.5px;font-weight:700;padding:5px 10px;border-radius:6px;
  box-shadow:0 6px 14px rgba(20,60,100,.18);
}
.tag-a{left:6%;top:56%}
.tag-b{right:5%;top:44%}
.tag-c{right:24%;bottom:-6px}

/* ============ 书单条 ============ */
.shelves{background:var(--blue-d);color:#fff;padding:22px 0}
.shelves-in{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.shelf{border-left:1px solid rgba(255,255,255,.22);padding-left:18px}
.shelf b{display:block;font-size:13.5px;color:var(--yellow);margin-bottom:4px}
.shelf span{display:block;font-size:12px;color:rgba(255,255,255,.72);line-height:1.9}

/* ============ 通用区块 ============ */
.sec{padding:64px 0}
.sec-tint{background:var(--tint);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.sec-h{margin-bottom:30px}
.sec-h .tag{
  display:inline-block;font-size:10px;letter-spacing:3px;color:var(--blue);
  background:var(--yellow);padding:2px 10px;border-radius:3px;margin-bottom:10px;
}
.sec-h h2{font-size:30px;margin-bottom:8px;color:var(--blue-d)}
.sec-h p{font-size:15px;color:var(--gray)}

/* ============ 入口：印章清单 ============ */
.check{display:grid;grid-template-columns:1fr 1fr;gap:14px 30px}
.chk{
  display:grid;grid-template-columns:58px 1fr;gap:14px;align-items:start;
  padding:20px 0;border-bottom:1px dashed #C9D9E6;
}
.stamp{
  width:52px;height:52px;border-radius:50%;border:2px dashed var(--blue);
  color:var(--blue);display:flex;align-items:center;justify-content:center;
  font-family:"SFMono-Regular",Consolas,monospace;font-size:15px;font-weight:700;
  transform:rotate(-8deg);background:#fff;
}
.chk:nth-child(even) .stamp{transform:rotate(7deg);border-color:#D9A900;color:#A57C00}
.chk h4{font-size:16.5px;margin-bottom:4px}
.chk p{font-size:14px;color:var(--gray)}
.chk code{
  font-family:"SFMono-Regular",Consolas,monospace;font-size:13px;
  background:var(--yellow-l);color:#8A6A00;padding:1px 5px;border-radius:3px;
}
.enote{
  margin-top:24px;background:var(--blue-l);border-radius:10px;
  padding:14px 18px;font-size:13.5px;color:var(--blue-d);
}

/* ============ 特色：便签 ============ */
.notes{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.note{
  position:relative;background:#FFFDF2;border:1px solid #EBE3C4;
  padding:30px 22px 22px;border-radius:4px;
  box-shadow:0 8px 18px rgba(60,80,60,.06);
}
.note:nth-child(even){background:#F4FAFF;border-color:#D8E7F2;transform:rotate(.5deg)}
.note:first-child{transform:rotate(-.6deg)}
.note::before{
  content:"";position:absolute;top:-10px;left:50%;transform:translateX(-50%) rotate(-2deg);
  width:74px;height:20px;background:rgba(255,212,0,.72);
  box-shadow:0 2px 4px rgba(0,0,0,.05);
}
.note:nth-child(even)::before{background:rgba(10,95,160,.22);transform:translateX(-50%) rotate(2deg)}
.note .no{
  display:block;font-size:11px;letter-spacing:2px;color:#A08447;
  font-family:"SFMono-Regular",Consolas,monospace;margin-bottom:6px;
}
.note h4{font-size:17px;margin-bottom:6px}
.note p{font-size:13.8px;color:#4E6472}

/* ============ 界面：2×2 截图 ============ */
.grid4{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.scard{
  border:1px solid var(--line);border-radius:10px;overflow:hidden;background:#fff;
  box-shadow:0 10px 24px rgba(20,60,100,.06);
}
.scard img{width:100%;aspect-ratio:16/10;object-fit:cover}
.scard figcaption{padding:12px 16px 14px;border-top:3px solid var(--yellow)}
.scard figcaption b{display:block;font-size:14px;margin-bottom:3px}
.scard figcaption p{font-size:12.8px;color:var(--gray)}
.guide{
  margin-top:26px;
  background:var(--blue-l);border-radius:12px;padding:24px 26px;
}
.guide h4{font-size:17px;color:var(--blue-d)}
.guide h4 span{display:block;font-size:11px;letter-spacing:2px;color:var(--blue);margin-top:4px;font-weight:600}
.guide ol{list-style:none;counter-reset:g;display:grid;gap:9px}
.guide li{counter-increment:g;position:relative;padding-left:30px;font-size:13.8px;color:#43596B}
.guide li::before{
  content:counter(g);position:absolute;left:0;top:2px;width:20px;height:20px;border-radius:50%;
  background:var(--yellow);color:var(--blue-d);font-size:11px;font-weight:800;
  display:flex;align-items:center;justify-content:center;
}

/* ============ FAQ：小册子两栏 ============ */
.booklet{display:grid;grid-template-columns:1fr 1fr;gap:0 40px}
.qa{
  position:relative;padding:20px 0 20px 46px;
  border-top:1px dashed #C9D9E6;
}
.qa .bigq{
  position:absolute;left:0;top:20px;width:32px;height:32px;border-radius:50%;
  background:var(--yellow);color:var(--blue-d);font-weight:800;font-size:12px;
  display:flex;align-items:center;justify-content:center;
  font-family:"SFMono-Regular",Consolas,monospace;
}
.qa h3{font-size:16px;margin-bottom:5px}
.qa p{font-size:13.8px;color:var(--gray)}

/* ============ 评价：便签三列 ============ */
.rnotes{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.rnote{
  background:var(--tint);border:1px solid var(--line);border-radius:8px;
  padding:20px;display:flex;flex-direction:column;gap:12px;
}
.rnote:nth-child(3n+2){background:#FFFDF2;border-color:#EBE3C4}
.rnote:nth-child(3n){background:#F2F8FF}
.rnote blockquote{font-size:13.4px;color:#4E6472;flex:1}
.rmeta{display:flex;align-items:center;gap:9px;border-top:1px solid rgba(20,60,100,.10);padding-top:10px}
.rav{
  width:30px;height:30px;border-radius:50%;background:var(--blue);color:#fff;
  display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:700;flex:none;
}
.rmeta b{font-size:12.5px;display:block;line-height:1.4}
.rmeta time{font-size:10.5px;color:#93A5B3;font-family:"SFMono-Regular",Consolas,monospace}

/* ============ 下载：券式 ============ */
.dlsec{padding:66px 0}
.coupon{
  position:relative;background:var(--blue-l);
  border:2px dashed #9CC4E1;border-radius:16px;
  padding:40px 44px;display:grid;grid-template-columns:1fr auto;gap:34px;align-items:center;
}
.coupon::before,.coupon::after{
  content:"";position:absolute;top:50%;width:22px;height:22px;border-radius:50%;
  background:#fff;border:2px dashed #9CC4E1;transform:translateY(-50%);
}
.coupon::before{left:-13px}
.coupon::after{right:-13px}
.dlogo{display:flex;align-items:center;gap:12px;margin-bottom:12px}
.dlogo img{width:52px;height:52px;border-radius:12px}
.dlogo em{font-style:normal;font-size:11px;letter-spacing:3px;color:var(--blue)}
.coupon h2{font-size:29px;color:var(--blue-d);margin-bottom:8px}
.coupon h2 em{font-style:normal;color:var(--blue)}
.coupon p{font-size:13.5px;color:#43596B;max-width:580px}
.dm{display:flex;gap:7px;flex-wrap:wrap;margin-top:14px}
.dm span{
  font-size:11px;background:#fff;border:1px solid #C9DFF1;border-radius:999px;
  padding:2px 10px;color:var(--blue-d);
}
.dlbtn-wrap{position:relative;text-align:center}
.seal{
  width:74px;height:74px;border-radius:50%;background:var(--yellow);color:var(--blue-d);
  display:flex;align-items:center;justify-content:center;text-align:center;
  font-size:11.5px;font-weight:800;line-height:1.4;transform:rotate(-10deg);
  margin:0 auto 14px;border:2px solid #fff;box-shadow:0 6px 14px rgba(20,60,100,.14);
}
.coupon .btn{background:var(--yellow);color:var(--blue-d);box-shadow:0 4px 0 #D9A900;white-space:nowrap}

/* ============ 页脚 ============ */
.ft{background:var(--blue-d);color:rgba(255,255,255,.72);padding:38px 0 28px;font-size:12.5px}
.ft-in{text-align:center}
.ft-top{display:flex;align-items:center;justify-content:center;gap:9px;margin-bottom:12px;color:#fff}
.ft-top img{width:28px;height:28px;border-radius:8px}
.ft p{max-width:680px;margin:0 auto 16px;line-height:1.95}
.ft-links{display:flex;gap:20px;justify-content:center;flex-wrap:wrap;margin-bottom:16px;font-size:12px}
.ft-links a{color:rgba(255,255,255,.82)}
.ft-links a:hover{color:var(--yellow)}
.ft-copy{font-size:11.5px;color:rgba(255,255,255,.48);line-height:1.9}

/* ============ 返回顶部 ============ */
.backtop{
  position:fixed;right:24px;bottom:88px;z-index:70;
  width:42px;height:42px;border-radius:50%;
  background:#fff;border:2px solid var(--blue);color:var(--blue);
  display:flex;align-items:center;justify-content:center;cursor:pointer;
  box-shadow:0 8px 18px rgba(20,60,100,.18);
}
.backtop:hover{background:var(--blue);color:#fff}

/* ============ 响应式 ============ */
@media (max-width:940px){
  .notes{grid-template-columns:1fr 1fr}
  .rnotes{grid-template-columns:1fr 1fr}
  .booklet{grid-template-columns:1fr}
  .check{grid-template-columns:1fr}
  .guide{grid-template-columns:1fr;gap:12px}
  .coupon{grid-template-columns:1fr;gap:24px;padding:34px 28px}
  .dlbtn-wrap{text-align:left}
  .seal{margin-left:0}
  .shelves-in{grid-template-columns:1fr}
}
@media (max-width:720px){
  .hd-nav{
    display:none;position:absolute;top:68px;left:0;right:0;
    background:#fff;border-bottom:2px solid var(--yellow);
    padding:8px 18px;flex-direction:column;gap:0;margin-left:0;
  }
  .hd-nav.open{display:flex}
  .hd-nav a{padding:10px 2px}
  .hd-menu{display:block;margin-left:auto}
  .hero{padding:34px 0 12px}
  .hero h1{font-size:42px}
  .hero .lead{font-size:17px}
  .trio{
    display:flex;justify-content:flex-start;overflow-x:auto;
    scroll-snap-type:x mandatory;gap:12px;padding:0 0 14px;
  }
  .ph.side,.ph.mid{width:76%;flex:0 0 76%;transform:none;scroll-snap-align:start}
  .ph-tag{display:none}
  .sec{padding:46px 0}
  .sec-h h2{font-size:24px}
  .notes{grid-template-columns:1fr}
  .note:nth-child(even){transform:none}
  .grid4{
    display:flex;overflow-x:auto;scroll-snap-type:x mandatory;gap:12px;
  }
  .grid4 .scard{flex:0 0 84%;scroll-snap-align:start}
  .rnotes{grid-template-columns:1fr}
  .backtop{right:16px;bottom:76px}
}