:root{
  --bg:#FFFCF6; --ink:#2B2118; --text:#5B5245; --mute:#857A6B;
  --line:#EFE3CF; --sun:#F59E0B; --sun-deep:#B45309; --sun-soft:#FFF3DC;
  --blue:#0EA5E9; --blue-deep:#0369A1; --blue-soft:#E8F6FE;
  --green:#10B981; --green-soft:#E7F9F1;
  --radius:22px;
}
*{box-sizing:border-box}
html,body{margin:0}
body{
  background:var(--bg); color:var(--ink);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",system-ui,sans-serif;
  -webkit-font-smoothing:antialiased; overflow-x:hidden;
}

/* ---------- 背景装饰 ---------- */
.sky{position:fixed;inset:0;pointer-events:none;z-index:0;overflow:hidden}
.sky .sun{position:absolute;top:-160px;right:-120px;width:420px;height:420px;border-radius:50%;
  background:radial-gradient(circle,#FFE7B0 0%,rgba(255,231,176,0) 68%)}
.sky .cloud{position:absolute;background:#fff;border-radius:999px;opacity:.55;
  filter:blur(14px);box-shadow:none}
.sky .c1{width:220px;height:64px;top:120px;left:-60px}
.sky .c2{width:150px;height:46px;top:340px;right:-40px}
.sky .c3{width:120px;height:38px;top:760px;left:40%;opacity:.6}

.wrap{position:relative;z-index:1;max-width:1080px;margin:0 auto;padding:26px 22px 60px}

/* ---------- 顶部 ---------- */
.top{display:flex;align-items:center;gap:12px;margin-bottom:28px}
.mark{width:46px;height:46px;border-radius:14px;background:linear-gradient(135deg,#FBBF24,#F59E0B);
  color:#fff;font-size:24px;font-weight:900;display:grid;place-items:center;
  box-shadow:0 8px 18px rgba(245,158,11,.32)}
.brand b{display:block;font-size:17px;letter-spacing:.5px}
.brand span{font-size:12.5px;color:var(--mute)}

/* ---------- 首屏 ---------- */
.hero{display:grid;grid-template-columns:1.15fr .85fr;gap:36px;align-items:center;margin-bottom:56px}
.sticker{display:inline-block;background:#fff;border:2px dashed #F3D3A0;border-radius:999px;
  padding:7px 16px;font-size:13px;font-weight:800;color:#B45309;margin-bottom:16px}
h1{font-size:52px;line-height:1.16;margin:0 0 16px;letter-spacing:-1px;font-weight:900}
h1 em{font-style:normal}
h1 .blue{color:var(--blue-deep)}
h1 .sun{color:var(--sun-deep)}
.lead{font-size:16.5px;line-height:1.8;color:var(--text);margin:0 0 26px;max-width:30em}
.cta{display:flex;gap:12px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:10px;border-radius:16px;padding:16px 26px;
  font-size:17px;font-weight:900;text-decoration:none;transition:transform .1s,box-shadow .2s}
.btn span{font-size:18px}
.btn.blue{background:var(--blue);color:#fff;box-shadow:0 12px 26px rgba(14,165,233,.32)}
.btn.sun{background:var(--sun);color:#fff;box-shadow:0 12px 26px rgba(245,158,11,.32)}
.btn.red{background:#DC2626;color:#fff;box-shadow:0 12px 26px rgba(220,38,38,.30)}
.btn:hover{transform:translateY(-2px)}
.mini-links{margin-top:16px;display:flex;gap:16px;font-size:13.5px;font-weight:700}
.mini-links a{color:var(--mute);text-decoration:none;border-bottom:1px dashed #D9C9B0;padding-bottom:2px}
.mini-links a:hover{color:var(--text)}

/* 手绘棋盘 */
.hero-art{position:relative;height:380px}
.board{position:absolute;background:#fff;border-radius:20px;padding:14px;
  box-shadow:0 18px 40px rgba(150,115,65,.16);border:1px solid var(--line)}
.board .bhead{font-size:12px;font-weight:900;color:var(--mute);margin-bottom:8px;letter-spacing:1px}
.b1{width:210px;left:6px;top:26px;transform:rotate(-4deg)}
.b2{width:196px;right:0;top:120px;transform:rotate(5deg);z-index:2}
.kgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:0;border:3px solid var(--ink);border-radius:8px;overflow:hidden}
.kgrid i{position:relative;aspect-ratio:1/1;border:1px solid #E7DAC3;background:#FFFDF8}
.kgrid i.k{font-style:normal;font-size:11px;font-weight:900;color:#B45309;padding:3px}
.kgrid i:nth-child(1),.kgrid i:nth-child(2){border-bottom:2.5px solid var(--ink)}
.kgrid i:nth-child(2){border-right:2.5px solid var(--ink)}
.kgrid i:nth-child(4),.kgrid i:nth-child(5),.kgrid i:nth-child(6){border-bottom:2.5px solid var(--ink)}
.kgrid i:nth-child(4){border-right:2.5px solid var(--ink)}
.sgrid{display:grid;grid-template-columns:repeat(4,1fr);border:3px solid var(--ink);border-radius:8px;overflow:hidden}
.sgrid i{aspect-ratio:1/1;display:grid;place-items:center;font-style:normal;font-size:15px;
  font-weight:900;color:var(--ink);border:1px solid #DCE6EC;background:#FBFDFF}
.sgrid i.e{background:#fff}
.spark{position:absolute;color:#FBBF24;font-size:26px;animation:float 3.4s ease-in-out infinite}
.spark.s1{left:-10px;top:0}
.spark.s2{right:36px;top:44px;font-size:18px;animation-delay:.8s}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-8px)}}

/* ---------- 三个好处 ---------- */
.why{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-bottom:56px}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;
  box-shadow:0 10px 26px rgba(150,115,65,.08)}
.ico{width:46px;height:46px;border-radius:14px;display:grid;place-items:center;margin-bottom:14px}
.ico span{display:block}
.ico.yellow{background:var(--sun-soft)} .ico.yellow span{width:18px;height:18px;border-radius:50%;background:var(--sun)}
.ico.green{background:var(--green-soft)} .ico.green span{width:18px;height:18px;border-radius:5px;background:var(--green)}
.ico.blue{background:var(--blue-soft)} .ico.blue span{width:20px;height:14px;border-radius:3px;background:var(--blue)}
.card h3{font-size:18px;margin:0 0 8px}
.card p{font-size:14px;line-height:1.75;color:var(--text);margin:0}

/* ---------- 三步 ---------- */
.how{margin-bottom:56px}
.how h2{font-size:30px;margin:0 0 22px;letter-spacing:-.5px}
.steps{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.steps li{display:flex;gap:14px;align-items:flex-start;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius);padding:20px}
.steps b{flex:none;width:38px;height:38px;border-radius:50%;background:var(--sun-soft);color:var(--sun-deep);
  font-size:17px;display:grid;place-items:center}
.steps strong{display:block;font-size:16px;margin-bottom:4px}
.steps span{font-size:13px;color:var(--mute);line-height:1.6}

/* ---------- 两个游戏 ---------- */
.games{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-bottom:56px}
.game-card{border-radius:26px;padding:26px;border:1px solid var(--line);background:#fff;
  box-shadow:0 12px 30px rgba(150,115,65,.09);display:flex;flex-direction:column}
.blue-card{background:linear-gradient(170deg,#F7FCFF,#fff 60%)}
.sun-card{background:linear-gradient(170deg,#FFFBF1,#fff 60%)}
.red-card{background:linear-gradient(170deg,#FFF6F5,#fff 60%)}
.gc-head{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:10px}
.gc-head h3{font-size:24px;margin:0}
.pill{font-size:11.5px;font-weight:800;border-radius:999px;padding:5px 10px}
.blue-card .pill{background:var(--blue-soft);color:var(--blue-deep)}
.sun-card .pill{background:var(--sun-soft);color:var(--sun-deep)}
.red-card .pill{background:#FFE9E7;color:#B91C1C}
.game-card p{font-size:14.5px;line-height:1.8;color:var(--text);margin:0 0 14px}
.game-card ul{margin:0 0 20px;padding-left:18px;font-size:13.5px;line-height:2;color:var(--text)}
.go{margin-top:auto;display:inline-flex;align-items:center;gap:8px;text-decoration:none;
  font-size:15px;font-weight:900;border-radius:14px;padding:13px 18px;align-self:flex-start}
.go.blue{background:var(--blue);color:#fff}
.go.sun{background:var(--sun);color:#fff}
.go.red{background:#DC2626;color:#fff}

/* ---------- 家长老师 ---------- */
.grown{background:#fff;border:1px solid var(--line);border-radius:26px;padding:26px;
  display:flex;gap:26px;align-items:center;justify-content:space-between;flex-wrap:wrap;
  box-shadow:0 12px 30px rgba(150,115,65,.08);margin-bottom:36px}
.grown h3{font-size:19px;margin:0 0 6px}
.grown p{font-size:13.5px;color:var(--text);margin:0;line-height:1.7;max-width:34em}
.grown-links{display:flex;gap:10px;flex-wrap:wrap}
.grown-links a{font-size:13px;font-weight:700;color:var(--text);text-decoration:none;
  border:1px solid var(--line);border-radius:12px;padding:10px 14px;background:#FFFDF8}
.grown-links a:hover{border-color:var(--sun);color:var(--sun-deep)}

footer{text-align:center;font-size:12.5px;color:var(--mute);line-height:1.9}

/* ---------- 移动端 ---------- */
@media (max-width:900px){
  .hero{grid-template-columns:1fr;gap:20px}
  .games{grid-template-columns:1fr}
  .hero-art{height:330px}
  h1{font-size:40px}
  .why,.steps{grid-template-columns:1fr}
  .games{grid-template-columns:1fr}
  .how h2{font-size:26px}
}
@media (max-width:520px){
  .wrap{padding:18px 16px 44px}
  h1{font-size:33px}
  .lead{font-size:15px}
  .cta{flex-direction:column}
  .btn{padding:14px 20px;font-size:15.5px;justify-content:center}
  .hero-art{height:300px}
  .b1{width:170px} .b2{width:158px}
}