/* ============================================================
   趣玩游戏库 GameBox — style.css
   深色科技风 · 玻璃拟态 · 渐变 · 响应式
   ============================================================ */

:root{
  --bg:#0f1115;
  --bg-2:#0b0d11;
  --card:#181c24;
  --card-2:#1d2330;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.14);
  --txt:#e6e9f0;
  --txt-2:#9aa3b2;
  --txt-3:#6b7384;
  --blue:#4f8cff;
  --blue-2:#2f6bff;
  --purple:#a855f7;
  --grad:linear-gradient(135deg,#4f8cff 0%,#7c5cff 50%,#a855f7 100%);
  --grad-blue:linear-gradient(135deg,#4f8cff,#2f6bff);
  --grad-purple:linear-gradient(135deg,#7c5cff,#a855f7);
  --radius:18px;
  --radius-sm:12px;
  --shadow:0 10px 30px rgba(0,0,0,.45);
  --shadow-lg:0 24px 60px rgba(0,0,0,.55);
  --glass:rgba(24,28,36,.72);
  --blur:saturate(160%) blur(14px);
  --ease:cubic-bezier(.22,.61,.36,1);
  --maxw:1240px;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:"Microsoft YaHei","PingFang SC","Segoe UI",system-ui,sans-serif;
  background:var(--bg);
  color:var(--txt);
  line-height:1.6;
  overflow-x:hidden;
  min-height:100vh;
}
a{color:inherit;text-decoration:none}
ul{list-style:none}
img{display:block;max-width:100%}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}

.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 24px}

/* ===== 通用按钮 ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:10px 22px;border-radius:30px;font-size:15px;font-weight:600;
  transition:transform .25s var(--ease),box-shadow .25s,opacity .2s;
  white-space:nowrap;user-select:none;
}
.btn:active{transform:translateY(1px) scale(.98)}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 8px 24px rgba(79,140,255,.35)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 14px 34px rgba(79,140,255,.5)}
.btn-ghost{background:rgba(255,255,255,.06);color:var(--txt);border:1px solid var(--line-strong);backdrop-filter:var(--blur)}
.btn-ghost:hover{background:rgba(255,255,255,.12);transform:translateY(-2px)}
.btn-lg{padding:14px 30px;font-size:16px}
.btn-login{padding:9px 22px;background:rgba(255,255,255,.06);border:1px solid var(--line-strong);color:var(--txt)}
.btn-login:hover{background:var(--grad);border-color:transparent}

/* ===== 顶部导航栏 ===== */
.navbar{
  position:fixed;top:0;left:0;right:0;z-index:100;
  background:rgba(15,17,21,.65);backdrop-filter:var(--blur);
  border-bottom:1px solid transparent;
  transition:background .3s,border-color .3s,box-shadow .3s;
}
.navbar.scrolled{
  background:rgba(11,13,17,.88);
  border-color:var(--line);
  box-shadow:0 6px 24px rgba(0,0,0,.4);
}
.nav-inner{display:flex;align-items:center;height:68px;gap:24px}

.logo{display:flex;align-items:center;gap:9px;font-size:20px;font-weight:800;letter-spacing:.5px;flex-shrink:0}
.logo-icon{font-size:22px;filter:drop-shadow(0 0 8px rgba(79,140,255,.6))}
.logo-text{color:#fff}
.logo-accent{background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}

.nav-menu{flex:1;display:flex;justify-content:center}
.nav-menu ul{display:flex;gap:6px}
.nav-link{
  position:relative;display:block;padding:9px 16px;border-radius:10px;
  color:var(--txt-2);font-size:15px;font-weight:500;transition:color .25s,background .25s;
}
.nav-link:hover{color:var(--txt);background:rgba(255,255,255,.05)}
.nav-link.active{color:#fff}
.nav-link.active::after{
  content:"";position:absolute;left:16px;right:16px;bottom:3px;height:2px;border-radius:2px;
  background:var(--grad);
}

.nav-actions{display:flex;align-items:center;gap:14px;flex-shrink:0}
.search-box{
  display:flex;align-items:center;gap:6px;
  background:rgba(255,255,255,.06);border:1px solid var(--line);
  border-radius:30px;padding:5px 6px 5px 16px;transition:border-color .25s,background .25s;
}
.search-box:focus-within{border-color:var(--blue);background:rgba(79,140,255,.08)}
.search-box input{
  background:none;border:none;outline:none;color:var(--txt);width:170px;font-size:14px;
}
.search-box input::placeholder{color:var(--txt-3)}
.search-btn{display:grid;place-items:center;width:32px;height:32px;border-radius:50%;color:var(--txt-2);transition:.2s}
.search-btn:hover{background:var(--grad);color:#fff}

.nav-toggle{display:none;flex-direction:column;gap:5px;padding:8px}
.nav-toggle span{display:block;width:22px;height:2px;background:var(--txt);border-radius:2px;transition:.3s}
.nav-toggle.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.open span:nth-child(2){opacity:0}
.nav-toggle.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ===== Banner ===== */
.banner{position:relative;min-height:660px;display:flex;align-items:center;overflow:hidden;padding-top:68px}
.banner-bg{position:absolute;inset:0;background-size:cover;background-position:center;transform:scale(1.05);animation:slowzoom 18s ease-in-out infinite alternate}
@keyframes slowzoom{to{transform:scale(1.14)}}
.banner-mask{position:absolute;inset:0;background:linear-gradient(90deg,rgba(15,17,21,.96) 0%,rgba(15,17,21,.7) 40%,rgba(15,17,21,.25) 100%),linear-gradient(0deg,rgba(15,17,21,1) 2%,transparent 55%)}
.banner-content{position:relative;z-index:2;max-width:640px;padding-top:40px;padding-bottom:60px}
.banner-badge{
  display:inline-flex;align-items:center;padding:6px 16px;border-radius:30px;font-size:13px;font-weight:600;
  background:rgba(79,140,255,.15);border:1px solid rgba(79,140,255,.4);color:#9cc0ff;margin-bottom:22px;
  animation:fadeup .8s var(--ease) both;
}
.banner-title{
  font-size:clamp(38px,6vw,68px);font-weight:900;line-height:1.1;letter-spacing:1px;margin-bottom:18px;
  background:linear-gradient(120deg,#fff 30%,#9cc0ff 70%,#c9a6ff 100%);
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
  animation:fadeup .8s .1s var(--ease) both;
}
.banner-desc{font-size:17px;color:var(--txt-2);max-width:520px;margin-bottom:30px;animation:fadeup .8s .2s var(--ease) both}
.banner-btns{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:46px;animation:fadeup .8s .3s var(--ease) both}
.banner-stats{display:flex;gap:38px;animation:fadeup .8s .4s var(--ease) both}
.stat{display:flex;flex-direction:column}
.stat b{font-size:30px;font-weight:800;color:#fff;line-height:1}
.stat span{font-size:13px;color:var(--txt-3);margin-top:4px}
@keyframes fadeup{from{opacity:0;transform:translateY(24px)}to{opacity:1;transform:none}}

/* ===== 通用区块 ===== */
.section{padding:84px 0}
.section-alt{background:var(--bg-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:34px;flex-wrap:wrap}
.section-title{font-size:30px;font-weight:800;letter-spacing:.5px;position:relative;padding-left:16px}
.section-title::before{content:"";position:absolute;left:0;top:6px;bottom:6px;width:5px;border-radius:3px;background:var(--grad)}
.section-sub{color:var(--txt-3);font-size:14px;margin-top:6px}
.link-more{color:var(--blue);font-size:14px;font-weight:600;transition:.2s}
.link-more:hover{color:#7cb0ff;transform:translateX(3px)}

.filter-tabs{display:flex;gap:8px;flex-wrap:wrap}
.tab{
  padding:7px 18px;border-radius:30px;font-size:13px;font-weight:600;
  background:rgba(255,255,255,.05);border:1px solid var(--line);color:var(--txt-2);transition:.25s;
}
.tab:hover{color:var(--txt);border-color:var(--line-strong)}
.tab.active{background:var(--grad);color:#fff;border-color:transparent;box-shadow:0 6px 18px rgba(79,140,255,.35)}

/* ===== 游戏卡片网格 ===== */
.game-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.grid-latest{grid-template-columns:repeat(4,1fr)}

.game-card{
  position:relative;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;cursor:pointer;transition:transform .35s var(--ease),box-shadow .35s,border-color .35s;
  animation:fadeup .6s var(--ease) both;
}
.game-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-lg);border-color:rgba(79,140,255,.45)}
.game-cover{
  position:relative;aspect-ratio:3/4;overflow:hidden;background:#0b0d11;
}
.game-cover img{width:100%;height:100%;object-fit:cover;transition:transform .5s var(--ease)}
.game-card:hover .game-cover img{transform:scale(1.1)}
.game-cover::after{
  content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 45%,rgba(0,0,0,.75) 100%);
}
.game-rating{
  position:absolute;top:12px;right:12px;z-index:2;display:flex;align-items:center;gap:4px;
  padding:5px 10px;border-radius:20px;font-size:12px;font-weight:700;color:#ffd66b;
  background:rgba(0,0,0,.55);backdrop-filter:blur(6px);
}
.game-fav{
  position:absolute;top:12px;left:12px;z-index:2;width:32px;height:32px;display:grid;place-items:center;
  border-radius:50%;font-size:16px;color:#fff;background:rgba(0,0,0,.45);backdrop-filter:blur(6px);
  transition:.2s;opacity:0;
}
.game-card:hover .game-fav{opacity:1}
.game-fav:hover{background:rgba(255,80,110,.9)}
.game-fav.active{opacity:1;color:#ff506e;background:rgba(255,80,110,.85)}

.game-body{padding:14px 16px 16px}
.game-name{font-size:16px;font-weight:700;line-height:1.35;margin-bottom:9px;display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden}
.game-tags{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:10px}
.tag{
  font-size:11px;padding:3px 9px;border-radius:20px;color:var(--txt-2);
  background:rgba(255,255,255,.06);border:1px solid var(--line);
}
.tag.blue{color:#9cc0ff;background:rgba(79,140,255,.12);border-color:rgba(79,140,255,.3)}
.game-foot{display:flex;align-items:center;justify-content:space-between;font-size:12px;color:var(--txt-3)}
.game-size{display:flex;align-items:center;gap:5px}
.game-size b{color:var(--txt-2);font-weight:600}
.stars{color:#ffd66b;letter-spacing:1px}
.game-date{font-size:12px;color:var(--txt-3)}

/* ===== 分类网格 ===== */
.category-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.cat-card{
  position:relative;display:flex;align-items:center;gap:14px;padding:18px;
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
  cursor:pointer;transition:transform .35s var(--ease),border-color .35s,box-shadow .35s;
}
.cat-card::before{
  content:"";position:absolute;inset:0;opacity:0;transition:opacity .35s;
  background:radial-gradient(circle at 0% 0%,rgba(79,140,255,.18),transparent 60%);
}
.cat-card:hover{transform:translateY(-6px);border-color:rgba(79,140,255,.4);box-shadow:var(--shadow)}
.cat-card:hover::before{opacity:1}
.cat-ico{width:54px;height:54px;border-radius:14px;flex-shrink:0}
.cat-name{font-size:16px;font-weight:700}
.cat-count{font-size:12px;color:var(--txt-3);margin-top:2px}

/* ===== 排行榜 ===== */
.rank-wrap{}
.rank-list{display:flex;flex-direction:column;gap:12px}
.rank-item{
  display:flex;align-items:center;gap:18px;padding:14px 20px;
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  cursor:pointer;transition:transform .3s var(--ease),border-color .3s,background .3s;
  animation:fadeup .5s var(--ease) both;
}
.rank-item:hover{transform:translateX(6px);border-color:rgba(79,140,255,.4);background:var(--card-2)}
.rank-no{
  flex-shrink:0;width:44px;height:44px;display:grid;place-items:center;border-radius:12px;
  font-size:20px;font-weight:900;font-style:italic;color:var(--txt-3);
  background:rgba(255,255,255,.05);border:1px solid var(--line);
}
.rank-item:nth-child(1) .rank-no{color:#fff;background:linear-gradient(135deg,#ffd24a,#ff8a3a);border-color:transparent;box-shadow:0 6px 18px rgba(255,170,60,.4)}
.rank-item:nth-child(2) .rank-no{color:#fff;background:linear-gradient(135deg,#cfd6e6,#9aa6bd);border-color:transparent}
.rank-item:nth-child(3) .rank-no{color:#fff;background:linear-gradient(135deg,#e0905a,#b5653a);border-color:transparent}
.rank-cover{width:56px;height:74px;border-radius:10px;overflow:hidden;flex-shrink:0;background:#0b0d11}
.rank-cover img{width:100%;height:100%;object-fit:cover}
.rank-info{flex:1;min-width:0}
.rank-name{font-size:16px;font-weight:700;margin-bottom:5px}
.rank-meta{display:flex;gap:14px;font-size:12px;color:var(--txt-3);flex-wrap:wrap}
.rank-heat{display:flex;align-items:center;gap:7px;flex-shrink:0}
.heat-bar{width:120px;height:8px;border-radius:5px;background:rgba(255,255,255,.08);overflow:hidden}
.heat-fill{height:100%;border-radius:5px;background:var(--grad)}
.heat-val{font-size:13px;font-weight:700;color:#ff7a59}

/* ===== VIP ===== */
.vip-card{
  position:relative;display:grid;grid-template-columns:1.3fr 1fr;gap:40px;
  padding:48px;border-radius:24px;overflow:hidden;
  background:linear-gradient(135deg,#1a1230 0%,#101a3a 60%,#0f1722 100%);
  border:1px solid rgba(168,85,247,.3);box-shadow:0 30px 80px rgba(80,40,160,.3);
}
.vip-glow{position:absolute;top:-40%;right:-10%;width:60%;height:160%;background:radial-gradient(circle,rgba(168,85,247,.4),transparent 60%);pointer-events:none}
.vip-left{position:relative;z-index:1}
.vip-badge{
  display:inline-block;padding:6px 16px;border-radius:30px;font-size:13px;font-weight:700;
  background:linear-gradient(135deg,#ffd24a,#ff8a3a);color:#1a1230;margin-bottom:18px;
}
.vip-title{font-size:32px;font-weight:800;margin-bottom:14px}
.vip-desc{color:var(--txt-2);margin-bottom:22px;max-width:440px}
.vip-perks{display:grid;gap:12px;margin-bottom:28px}
.vip-perks li{display:flex;align-items:center;gap:10px;font-size:14px;color:var(--txt)}
.perk-ico{display:inline-grid;place-items:center;width:26px;height:26px;border-radius:8px;font-size:14px;background:rgba(168,85,247,.2)}
.vip-right{position:relative;z-index:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:24px}
.vip-price{display:flex;align-items:flex-start;color:#fff}
.price-unit{font-size:22px;font-weight:700;margin-top:8px}
.price-num{font-size:76px;font-weight:900;line-height:1;background:linear-gradient(135deg,#ffd24a,#ff8a3a);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.price-period{font-size:16px;color:var(--txt-2);margin-top:14px}
.vip-plans{display:flex;gap:10px;width:100%}
.plan{
  flex:1;text-align:center;padding:14px 8px;border-radius:14px;background:rgba(255,255,255,.05);
  border:1px solid var(--line);transition:.25s;position:relative;
}
.plan span{display:block;font-size:12px;color:var(--txt-3);margin-bottom:4px}
.plan b{font-size:18px;font-weight:800;color:#fff}
.plan:hover{border-color:rgba(168,85,247,.5);transform:translateY(-3px)}
.plan-hot{border-color:rgba(255,170,60,.6);background:rgba(255,170,60,.1)}
.hot-tag{position:absolute;top:-10px;left:50%;transform:translateX(-50%);font-size:10px;font-weight:700;padding:2px 10px;border-radius:20px;background:linear-gradient(135deg,#ffd24a,#ff8a3a);color:#1a1230}

/* ===== Footer ===== */
.footer{background:var(--bg-2);border-top:1px solid var(--line);padding-top:54px}
.footer-inner{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:36px;padding-bottom:36px}
.footer-brand .logo{margin-bottom:14px}
.footer-desc{color:var(--txt-3);font-size:13px;max-width:280px}
.footer-col h4{font-size:15px;font-weight:700;margin-bottom:16px;color:#fff}
.footer-col ul{display:grid;gap:10px}
.footer-col a{color:var(--txt-3);font-size:13px;transition:.2s}
.footer-col a:hover{color:var(--blue)}
.footer-bottom{border-top:1px solid var(--line);padding:20px 0;text-align:center}
.footer-bottom p{font-size:12px;color:var(--txt-3)}

/* ===== 详情弹窗 ===== */
.modal{position:fixed;inset:0;z-index:200;display:none;align-items:center;justify-content:center;padding:24px}
.modal.open{display:flex}
.modal-backdrop{position:absolute;inset:0;background:rgba(5,7,11,.78);backdrop-filter:blur(8px);animation:fade .3s}
.modal-box{
  position:relative;width:100%;max-width:760px;max-height:90vh;overflow:auto;border-radius:22px;
  background:var(--card);border:1px solid var(--line-strong);box-shadow:var(--shadow-lg);
  animation:modalin .4s var(--ease);
}
@keyframes modalin{from{opacity:0;transform:translateY(30px) scale(.97)}to{opacity:1;transform:none}}
@keyframes fade{from{opacity:0}to{opacity:1}}
.modal-close{
  position:absolute;top:16px;right:16px;z-index:5;width:38px;height:38px;border-radius:50%;
  background:rgba(0,0,0,.5);color:#fff;font-size:18px;backdrop-filter:blur(6px);transition:.2s;
}
.modal-close:hover{background:rgba(255,80,110,.9);transform:rotate(90deg)}
.modal-hero{height:280px;background-size:cover;background-position:center;position:relative}
.modal-hero::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 30%,var(--card) 100%)}
.modal-body{padding:0 30px 30px;margin-top:-70px;position:relative;z-index:2}
.modal-cover{width:120px;height:160px;border-radius:14px;overflow:hidden;box-shadow:var(--shadow);background:#0b0d11}
.modal-cover img{width:100%;height:100%;object-fit:cover}
.modal-info{display:flex;flex-direction:column;gap:10px;margin-top:14px}
.modal-name{font-size:26px;font-weight:800}
.modal-meta{display:flex;gap:18px;flex-wrap:wrap;font-size:13px;color:var(--txt-2)}
.modal-meta b{color:var(--txt)}
.modal-tags{display:flex;gap:8px;flex-wrap:wrap}
.modal-desc{color:var(--txt-2);font-size:14px;line-height:1.8;margin:18px 0 24px}
.modal-actions{display:flex;gap:14px;flex-wrap:wrap}
.fav-icon{font-size:16px}
#favBtn.active .fav-icon{color:#ff506e}
#favBtn.active .fav-text::before{content:"已收藏 "}

/* ===== Toast ===== */
.toast{
  position:fixed;left:50%;bottom:34px;transform:translateX(-50%) translateY(20px);
  padding:12px 26px;border-radius:30px;font-size:14px;font-weight:600;color:#fff;
  background:rgba(24,28,36,.95);border:1px solid var(--line-strong);box-shadow:var(--shadow);
  backdrop-filter:blur(10px);opacity:0;pointer-events:none;transition:.35s var(--ease);z-index:300;
}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* ===== 回到顶部 ===== */
.back-top{
  position:fixed;right:26px;bottom:26px;width:46px;height:46px;border-radius:50%;
  background:var(--grad);color:#fff;font-size:20px;font-weight:700;box-shadow:0 10px 26px rgba(79,140,255,.4);
  opacity:0;pointer-events:none;transition:.3s var(--ease);z-index:90;display:grid;place-items:center;
}
.back-top.show{opacity:1;pointer-events:auto}
.back-top:hover{transform:translateY(-4px)}

/* ===== 空状态 ===== */
.empty{grid-column:1/-1;text-align:center;padding:60px 20px;color:var(--txt-3)}
.empty b{display:block;font-size:42px;margin-bottom:10px}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width:1080px){
  .game-grid,.grid-latest{grid-template-columns:repeat(3,1fr)}
  .category-grid{grid-template-columns:repeat(4,1fr)}
  .search-box input{width:120px}
}
@media (max-width:900px){
  .nav-toggle{display:flex}
  .nav-menu{
    position:fixed;top:68px;left:0;right:0;flex-direction:column;background:rgba(11,13,17,.97);
    backdrop-filter:blur(16px);border-bottom:1px solid var(--line);padding:14px 24px 22px;
    transform:translateY(-130%);transition:transform .35s var(--ease);max-height:calc(100vh - 68px);overflow:auto;
  }
  .nav-menu.open{transform:translateY(0)}
  .nav-menu ul{flex-direction:column;gap:4px}
  .nav-link{padding:13px 16px;font-size:16px}
  .nav-link.active::after{display:none}
  .nav-link.active{background:rgba(79,140,255,.15)}
  .nav-actions{margin-left:auto}
  .search-box input{width:130px}
  .vip-card{grid-template-columns:1fr;gap:30px;padding:34px}
  .vip-right{align-items:flex-start}
  .footer-inner{grid-template-columns:1fr 1fr}
}
@media (max-width:680px){
  .container{padding:0 16px}
  .section{padding:60px 0}
  .game-grid,.grid-latest{grid-template-columns:repeat(2,1fr);gap:16px}
  .category-grid{grid-template-columns:repeat(2,1fr)}
  .section-title{font-size:24px}
  .banner{min-height:560px}
  .banner-stats{gap:22px}
  .stat b{font-size:24px}
  .search-box input{width:90px}
  .btn-login{padding:8px 14px}
  .rank-item{gap:12px;padding:12px 14px}
  .rank-cover{width:46px;height:60px}
  .heat-bar{width:70px}
  .modal-body{padding:0 18px 22px;margin-top:-50px}
  .modal-hero{height:200px}
  .footer-inner{grid-template-columns:1fr;gap:24px}
  .vip-price .price-num{font-size:60px}
}
@media (max-width:420px){
  .game-grid,.grid-latest{grid-template-columns:1fr}
  .category-grid{grid-template-columns:1fr}
  .search-box input{width:70px}
  .banner-btns .btn{flex:1}
}

/* 减少动画偏好 */
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
}