/* ========== 全局 ========== */
*{margin:0;padding:0;box-sizing:border-box;font-family:system-ui,-apple-system,'Segoe UI',Roboto,'Helvetica Neue',sans-serif}

body{
  min-height:100vh;
  color:#1e2b3c;
  background:linear-gradient(180deg,#87CEEB 0%,#A8D8F0 18%,#C8E6F5 38%,#DCEFF5 55%,#E8F5E0 72%,#C8E6A0 100%);
  background-attachment:fixed;
  position:relative;
  overflow-x:hidden;
  display:flex;
  flex-direction:column;
}

/* ========== 天空场景 ========== */
.sky-scene{position:fixed;inset:0;pointer-events:none;z-index:0;overflow:hidden}
.sun{position:absolute;top:40px;right:80px;width:110px;height:110px;border-radius:50%;
  background:radial-gradient(circle at 35% 35%,#FFF8D6 0%,#FFE066 40%,#FFB347 75%,rgba(255,179,71,0) 100%);
  box-shadow:0 0 80px 30px rgba(255,224,102,.55),0 0 160px 60px rgba(255,200,80,.25);
  animation:sunPulse 6s ease-in-out infinite}
@keyframes sunPulse{0%,100%{transform:scale(1)}50%{transform:scale(1.06)}}

.cloud{position:absolute;background:#fff;border-radius:50%;opacity:.85;filter:blur(.5px);animation:cloudMove linear infinite}
.cloud::before,.cloud::after{content:'';position:absolute;background:#fff;border-radius:50%}
.cloud::before{width:60%;height:120%;top:-50%;left:12%}
.cloud::after{width:80%;height:150%;top:-70%;right:8%}
.cloud.c1{width:120px;height:44px;top:70px;left:-160px;animation-duration:60s}
.cloud.c2{width:90px;height:34px;top:150px;left:-140px;animation-duration:80s;animation-delay:-20s;opacity:.7}
.cloud.c3{width:150px;height:52px;top:40px;left:-200px;animation-duration:95s;animation-delay:-40s;opacity:.75}
.cloud.c4{width:100px;height:38px;top:220px;left:-150px;animation-duration:70s;animation-delay:-30s;opacity:.65}
.cloud.c5{width:130px;height:46px;top:110px;left:-180px;animation-duration:88s;animation-delay:-15s;opacity:.8}
@keyframes cloudMove{from{transform:translateX(0)}to{transform:translateX(calc(100vw + 260px))}}

.bird{position:absolute;font-size:22px;color:#3a4a5a;animation:birdFly linear infinite;opacity:.75}
.bird::before{content:'🕊'}
.bird.b1{top:130px;animation-duration:38s;animation-delay:-5s}
.bird.b2{top:180px;animation-duration:46s;animation-delay:-18s;font-size:16px}
.bird.b3{top:90px;animation-duration:52s;animation-delay:-32s;font-size:18px}
@keyframes birdFly{0%{transform:translateX(-80px) translateY(0)}50%{transform:translateX(50vw) translateY(-30px)}100%{transform:translateX(calc(100vw + 80px)) translateY(10px)}}

.plane{position:absolute;font-size:28px;color:#fff;text-shadow:0 2px 6px rgba(0,60,120,.35);animation:planeFly 26s linear infinite;opacity:.9}
.plane::before{content:'✈'}
.plane.p1{top:60px;animation-delay:0s}
.plane.p2{top:260px;font-size:20px;animation-duration:34s;animation-delay:-14s;opacity:.7}
@keyframes planeFly{0%{transform:translateX(-100px) translateY(0) rotate(-8deg)}50%{transform:translateX(50vw) translateY(-40px) rotate(-2deg)}100%{transform:translateX(calc(100vw + 100px)) translateY(20px) rotate(4deg)}}

.kite{position:absolute;top:200px;font-size:36px;color:#e74c3c;animation:kiteFloat 5s ease-in-out infinite;opacity:.85}
.kite::before{content:'🪁'}
.kite.k1{right:14%}
@keyframes kiteFloat{0%,100%{transform:translateY(0) rotate(-6deg)}50%{transform:translateY(-18px) rotate(6deg)}}

/* ========== 地面场景 ========== */
.landscape{position:fixed;bottom:0;left:0;right:0;height:340px;pointer-events:none;z-index:0;overflow:hidden}
.mountain{position:absolute;bottom:150px;width:0;height:0;border-style:solid}
.mtn-far{border-width:0 220px 130px 220px;border-color:transparent transparent #7FB3D5 transparent;left:2%;opacity:.55}
.mtn-far2{border-width:0 260px 160px 260px;border-color:transparent transparent #6FA8C8 transparent;right:5%;opacity:.5}
.mtn-mid{border-width:0 300px 180px 300px;border-color:transparent transparent #5A9E6F transparent;left:22%;bottom:110px;opacity:.7}
.mtn-mid2{border-width:0 240px 150px 240px;border-color:transparent transparent #4E8F62 transparent;right:20%;bottom:120px;opacity:.65}

.tree{position:absolute;bottom:120px;font-size:56px;filter:drop-shadow(0 6px 8px rgba(0,60,40,.18))}
.tree::before{content:'🌳'}
.tree.t1{left:4%;font-size:60px}
.tree.t2{left:16%;font-size:48px;bottom:100px;opacity:.9}
.tree.t3{right:8%;font-size:62px}
.tree.t4{right:22%;font-size:44px;bottom:105px;opacity:.9}
.tree.t5{left:38%;font-size:40px;bottom:95px;opacity:.75}
.tree.t6{right:40%;font-size:38px;bottom:90px;opacity:.7}

.grass{position:absolute;bottom:0;left:0;right:0;height:140px;
  background:linear-gradient(180deg,#A8D88A 0%,#8CC96B 45%,#6FB84F 100%);
  border-radius:50% 50% 0 0 / 28% 28% 0 0;
  box-shadow:0 -6px 20px rgba(80,150,60,.25) inset}

.river{position:absolute;bottom:40px;left:50%;transform:translateX(-50%) skewX(-8deg);
  width:70%;height:52px;background:linear-gradient(180deg,#9FD4F0 0%,#6FB8E0 50%,#4EA0CC 100%);
  border-radius:50%;box-shadow:0 4px 14px rgba(60,140,200,.35) inset;opacity:.85;overflow:hidden}
.river::before{content:'';position:absolute;inset:0;
  background:repeating-linear-gradient(90deg,transparent 0 40px,rgba(255,255,255,.35) 40px 46px);
  border-radius:50%;animation:riverFlow 5s linear infinite}
@keyframes riverFlow{from{transform:translateX(0)}to{transform:translateX(46px)}}

/* ========== 应用主体 ========== */
.app{position:relative;z-index:5;max-width:1240px;width:100%;margin:0 auto;padding:1.2rem 1rem 2rem;flex:1 0 auto;display:flex;flex-direction:column}
.game-wrap{position:relative;z-index:5;max-width:1240px;width:100%;margin:0 auto;padding:1.2rem 1rem 2rem;flex:1 0 auto;display:flex;flex-direction:column}

/* ========== 头部 ========== */
.site-header{display:flex;align-items:center;justify-content:space-between;gap:1rem;
  background:rgba(255,255,255,.72);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border-radius:22px;padding:.9rem 1.4rem;
  box-shadow:0 8px 28px rgba(30,80,140,.12),0 1px 0 rgba(255,255,255,.9) inset;
  border:1px solid rgba(255,255,255,.85);margin-bottom:1.6rem}

.logo{display:flex;align-items:center;gap:.7rem;text-decoration:none;color:inherit;flex-shrink:0}
.logo-mark{width:44px;height:44px;border-radius:14px;background:linear-gradient(145deg,#4EA0CC,#1E6D8C);
  display:flex;align-items:center;justify-content:center;font-size:1.4rem;
  box-shadow:0 6px 14px rgba(30,109,140,.35)}
.logo-text{display:flex;flex-direction:column;line-height:1.15}
.logo-text b{font-size:1.1rem;color:#0f1e2e;font-weight:800;letter-spacing:-.01em}
.logo-text span{font-size:.72rem;color:#5a7f96;letter-spacing:.4px}

.main-nav{display:flex;gap:.3rem;flex-wrap:wrap;justify-content:flex-end}
.main-nav a{text-decoration:none;color:#2a4054;font-size:.85rem;font-weight:600;padding:.45rem .9rem;
  border-radius:40px;transition:.18s;white-space:nowrap}
.main-nav a:hover{background:rgba(78,160,204,.16);color:#1E6D8C}
.main-nav a.active{background:linear-gradient(145deg,#4EA0CC,#1E6D8C);color:#fff;
  box-shadow:0 4px 12px rgba(30,109,140,.3)}

/* ========== 标题 ========== */
.page-title{text-align:center;margin-bottom:1.4rem}
.page-title h1{font-size:1.9rem;font-weight:800;color:#0f1e2e;letter-spacing:-.02em;
  text-shadow:0 2px 12px rgba(255,255,255,.6);margin-bottom:.25rem}
.page-title p{font-size:.95rem;color:#3d5c72;text-shadow:0 1px 6px rgba(255,255,255,.7)}

/* ========== 卡片 ========== */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(270px,1fr));gap:1.1rem}
.card{position:relative;background:rgba(255,255,255,.82);backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);border-radius:22px;padding:1.3rem 1.3rem 1.1rem;
  border:1px solid rgba(255,255,255,.9);
  box-shadow:0 8px 24px rgba(30,80,140,.1),0 1px 0 rgba(255,255,255,.8) inset;
  cursor:pointer;transition:.22s cubic-bezier(.4,0,.2,1);text-decoration:none;color:inherit;
  display:flex;flex-direction:column;overflow:hidden}
.card::before{content:'';position:absolute;top:0;left:0;right:0;height:4px;
  background:linear-gradient(90deg,#4EA0CC,#5A9E6F,#F1C40F);opacity:.85}
.card:hover{transform:translateY(-4px);
  box-shadow:0 16px 36px rgba(30,80,140,.18),0 1px 0 rgba(255,255,255,.9) inset;
  border-color:rgba(78,160,204,.45)}

.cat{font-size:.7rem;font-weight:700;letter-spacing:.5px;color:#3d7a99;
  background:rgba(78,160,204,.14);display:inline-block;padding:.18rem .65rem;
  border-radius:30px;margin-bottom:.55rem;align-self:flex-start}
.card h3{font-size:1.12rem;font-weight:700;color:#0e1d2c;margin-bottom:.4rem;
  letter-spacing:-.01em;line-height:1.3}
.card p{font-size:.86rem;color:#4d6376;line-height:1.5;flex:1}
.pro{background:linear-gradient(145deg,#FFE066,#FFB347);color:#7a4b00;font-size:.62rem;
  padding:.12rem .5rem;border-radius:20px;margin-left:.4rem;font-weight:800;
  letter-spacing:.4px;vertical-align:middle}

/* ========== 筛选 ========== */
.filters{display:flex;flex-wrap:wrap;gap:.5rem;justify-content:center;margin-bottom:1.4rem}
.filters button{padding:.5rem 1.15rem;border:1px solid rgba(255,255,255,.9);
  background:rgba(255,255,255,.75);backdrop-filter:blur(6px);border-radius:50px;
  cursor:pointer;font-size:.87rem;font-weight:600;color:#2a4054;transition:.18s;
  box-shadow:0 3px 10px rgba(30,80,140,.08)}
.filters button:hover{background:rgba(255,255,255,.95);transform:translateY(-1px)}
.filters button.on{background:linear-gradient(145deg,#4EA0CC,#1E6D8C);color:#fff;
  border-color:transparent;box-shadow:0 6px 16px rgba(30,109,140,.32)}

/* ========== 页脚 ========== */
.site-footer{position:relative;z-index:5;max-width:1240px;margin:2.4rem auto 0;
  padding:1.5rem 1.4rem;background:rgba(255,255,255,.68);backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);border-radius:22px;
  border:1px solid rgba(255,255,255,.85);box-shadow:0 8px 28px rgba(30,80,140,.1);
  color:#3d5c72;font-size:.85rem;display:flex;flex-wrap:wrap;
  justify-content:space-between;align-items:center;gap:1rem;margin-top:auto;}
.game-wrap .site-footer{max-width:100%}
.footer-left{display:flex;flex-direction:column;gap:.25rem}
.footer-left b{color:#0f1e2e;font-size:.95rem;font-weight:800}
.footer-left small{color:#6b8ba0;font-size:.75rem}
.footer-right{display:flex;gap:1.2rem;flex-wrap:wrap;align-items:center}
.footer-right a{color:#2a6d8c;text-decoration:none;font-weight:600;transition:.15s}
.footer-right a:hover{color:#1E6D8C;text-decoration:underline}
.footer-right span{color:#6b8ba0;font-size:.78rem}

/* ========== 游戏容器 ========== */
.game-box{background:rgba(255,255,255,.9);backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);border-radius:26px;padding:1.8rem 1.6rem;
  border:1px solid rgba(255,255,255,.95);
  box-shadow:0 16px 40px rgba(30,80,140,.14);text-align:center;
  max-width:640px;margin:0 auto}
.game-box h2{font-size:1.5rem;font-weight:800;color:#0e1d2c;margin-bottom:.3rem;letter-spacing:-.01em}
.game-box p.s{color:#5a7f96;font-size:.9rem;margin-bottom:1.2rem}
.game-box .btn{background:linear-gradient(145deg,#4EA0CC,#1E6D8C);color:#fff;border:none;
  padding:.75rem 1.8rem;border-radius:50px;font-size:1rem;font-weight:600;cursor:pointer;
  margin:.3rem;box-shadow:0 6px 16px rgba(30,109,140,.3);transition:.18s}
.game-box .btn:hover{transform:translateY(-2px);box-shadow:0 10px 22px rgba(30,109,140,.4)}
.game-box .btn.o{background:rgba(255,255,255,.9);border:1px solid #b6cdde;color:#1e3f5a;
  box-shadow:0 3px 10px rgba(30,80,140,.08)}
.game-box .info{color:#4d6376;font-size:.9rem;margin:.5rem 0}
.game-box .res{background:linear-gradient(145deg,#d4f0dd,#b8e6c8);color:#1b6b4b;
  font-weight:700;padding:.8rem 1.5rem;border-radius:50px;display:inline-block;margin:.5rem}

/* ========== 响应式 ========== */
@media (max-width:720px){
  .site-header{flex-direction:column;align-items:stretch;gap:.7rem;padding:.8rem 1rem}
  .main-nav{justify-content:center}
  .page-title h1{font-size:1.5rem}
  .sun{width:80px;height:80px;top:20px;right:24px}
  .site-footer{flex-direction:column;text-align:center}
  .footer-right{justify-content:center}
  .kite{right:6%;font-size:28px}
}
@media (max-width:520px){
  .grid{grid-template-columns:1fr}
  .main-nav a{font-size:.78rem;padding:.35rem .7rem}
}