/* ============================================================
   机器码兑换中心 - 全局样式
   前台深色科技风（与注册机一致）；后台通过 body.admin 切换浅色管理风
   ============================================================ */
:root{
  --bg-top:#141428; --bg-mid:#1a2342; --bg-bot:#0e2a52;
  --card:rgba(255,255,255,.055); --card-border:rgba(255,255,255,.13);
  --text:#eef2ff; --text-dim:rgba(238,242,255,.58);
  --accent:#7cf7ff; --accent2:#86a8ff;
  --ok:#34d399; --warn:#fbbf24; --err:#f87171; --info:#60a5fa; --gold:#ffaa00;
  --radius:14px;
}
body.admin{
  --bg-top:#f2f5fa; --bg-mid:#eef1f7; --bg-bot:#e7ecf5;
  --card:#ffffff; --card-border:#e3e8f2;
  --text:#1c2434; --text-dim:#6b7690;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  min-height:100vh; color:var(--text);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  background:radial-gradient(1200px 700px at 50% -10%,var(--bg-top) 0,var(--bg-mid) 55%,var(--bg-bot) 100%);
  background-attachment:fixed; -webkit-font-smoothing:antialiased;
}
a{color:var(--accent);text-decoration:none}
body.admin a{color:#3b6fd8}
img{max-width:100%}
.wrap{max-width:1080px;margin:0 auto;padding:0 16px}

/* ---------- 顶部导航 ---------- */
.topbar{position:sticky;top:0;z-index:50;backdrop-filter:blur(14px);
  background:rgba(12,16,34,.72);border-bottom:1px solid rgba(255,255,255,.08)}
body.admin .topbar{background:rgba(255,255,255,.86);border-bottom:1px solid var(--card-border)}
.topbar-inner{display:flex;align-items:center;gap:18px;height:58px}
.brand{font-size:17px;font-weight:800;letter-spacing:.3px;color:#fff;white-space:nowrap;
  background:linear-gradient(135deg,var(--accent),var(--accent2));
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
body.admin .brand{-webkit-text-fill-color:#243}
.topnav{display:flex;gap:2px;flex:1;overflow-x:auto;scrollbar-width:none}
.topnav::-webkit-scrollbar{display:none}
.topnav a{padding:8px 13px;border-radius:10px;font-size:14px;color:var(--text-dim);white-space:nowrap}
.topnav a:hover{color:var(--text);background:rgba(255,255,255,.07)}
.topnav a.active{color:#fff;background:linear-gradient(135deg,rgba(124,247,255,.18),rgba(134,168,255,.18));font-weight:600}
body.admin .topnav a.active{color:#1c2434;background:#e3ecff}
.userbox{display:flex;align-items:center;gap:10px;white-space:nowrap}
.userbox .cred-pill{padding:4px 11px;border-radius:999px;font-size:12px;font-weight:600;
  background:linear-gradient(135deg,rgba(124,247,255,.16),rgba(134,168,255,.16));
  border:1px solid rgba(124,247,255,.35);color:var(--accent)}
body.admin .userbox .cred-pill{background:#eef4ff;border-color:#c9d8f6;color:#3b6fd8}
.userbox .uname{font-size:14px;color:var(--text)}
.btn-link{background:none;border:none;color:var(--accent);cursor:pointer;font-size:14px;padding:6px 4px}
body.admin .btn-link{color:#3b6fd8}
.btn-link:hover{text-decoration:underline}

/* ---------- 按钮 ---------- */
.btn{display:inline-block;padding:11px 22px;border:none;border-radius:12px;font-size:15px;font-weight:700;
  cursor:pointer;text-align:center;background:linear-gradient(135deg,var(--accent),var(--accent2));
  color:#08111f;transition:transform .15s,box-shadow .15s}
.btn:hover{transform:translateY(-1px);box-shadow:0 8px 22px rgba(124,247,255,.28)}
.btn:disabled{opacity:.55;cursor:not-allowed;transform:none}
.btn.block{display:block;width:100%}
.btn.ghost{background:rgba(255,255,255,.08);color:var(--text);border:1px solid var(--card-border)}
.btn.ghost:hover{box-shadow:none;background:rgba(255,255,255,.13)}
.btn.danger{background:linear-gradient(135deg,#f87171,#ef4444);color:#fff}
.btn.mini{padding:6px 12px;font-size:13px;border-radius:9px}
.btn.warn{background:linear-gradient(135deg,#fbbf24,#f97316);color:#1c1917}
.btn.sm{padding:8px 14px;font-size:13px}

/* ---------- 卡片/面板 ---------- */
.card{background:var(--card);border:1px solid var(--card-border);border-radius:var(--radius);
  backdrop-filter:blur(14px);padding:22px}
.card + .card{margin-top:16px}
.card h3{margin:0 0 14px;font-size:16px}
.muted{color:var(--text-dim);font-size:13px}
.center{text-align:center}
.mt16{margin-top:16px}.mt24{margin-top:24px}.mb16{margin-bottom:16px}
.gap8{display:flex;gap:8px}
.flex{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.spread{display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap}

/* ---------- 表单 ---------- */
.field{margin-bottom:14px}
.field label{display:block;font-size:13px;color:var(--text-dim);margin-bottom:6px}
.field input[type=text],.field input[type=password],.field input[type=email],
.field input[type=number],.field input[type=url],.field select,.field textarea{
  width:100%;padding:11px 14px;border-radius:11px;font-size:14px;color:var(--text);
  background:rgba(255,255,255,.07);border:1px solid var(--card-border);outline:none;transition:border .2s}
body.admin .field input,body.admin .field select,body.admin .field textarea{background:#fff;border-color:#d8dfeb;color:#1c2434}
.field input:focus,.field select:focus,.field textarea:focus{border-color:rgba(124,247,255,.55)}
body.admin .field input:focus{border-color:#8fb0f0}
.field textarea{min-height:90px;resize:vertical}
.hint{font-size:12px;color:var(--text-dim);margin-top:5px}

/* ---------- 消息条 ---------- */
.alert{padding:11px 15px;border-radius:11px;font-size:14px;margin-bottom:14px}
.alert.ok{background:rgba(52,211,153,.12);border:1px solid rgba(52,211,153,.35);color:#6ee7b7}
.alert.err{background:rgba(248,113,113,.12);border:1px solid rgba(248,113,113,.35);color:#fca5a5}
.alert.warn{background:rgba(251,191,36,.12);border:1px solid rgba(251,191,36,.35);color:#fcd34d}
.alert.info{background:rgba(96,165,250,.12);border:1px solid rgba(96,165,250,.35);color:#93c5fd}

/* ---------- 表格 ---------- */
.tbl{width:100%;border-collapse:collapse;font-size:13.5px}
.tbl th,.tbl td{padding:10px 10px;text-align:left;border-bottom:1px solid var(--card-border)}
.tbl th{color:var(--text-dim);font-weight:600;font-size:12.5px;white-space:nowrap}
.tbl tr:hover td{background:rgba(255,255,255,.03)}
.tbl .num{font-variant-numeric:tabular-nums}

/* ---------- 徽章 ---------- */
.badge{display:inline-block;padding:2px 9px;border-radius:999px;font-size:12px;font-weight:600}
.badge.green{background:rgba(52,211,153,.15);color:#6ee7b7;border:1px solid rgba(52,211,153,.3)}
.badge.red{background:rgba(248,113,113,.15);color:#fca5a5;border:1px solid rgba(248,113,113,.3)}
.badge.gray{background:rgba(148,163,184,.14);color:#cbd5e1;border:1px solid rgba(148,163,184,.25)}
.badge.blue{background:rgba(96,165,250,.15);color:#93c5fd;border:1px solid rgba(96,165,250,.3)}
.badge.gold{background:rgba(255,170,0,.15);color:#ffc84d;border:1px solid rgba(255,170,0,.35)}
body.admin .badge.green{color:#059669}.badge.green{border-color:#34d399}

/* ---------- 分页 ---------- */
.pager{display:flex;gap:6px;align-items:center;margin-top:16px;flex-wrap:wrap}
.pager a,.pager span{padding:6px 12px;border-radius:9px;font-size:13px;border:1px solid var(--card-border);color:var(--text)}
.pager a:hover{background:rgba(255,255,255,.08)}
.pager .cur{background:linear-gradient(135deg,var(--accent),var(--accent2));color:#08111f;font-weight:700;border-color:transparent}
.pager .off{opacity:.35;pointer-events:none}

/* ---------- 登录/注册页 ---------- */
.auth-page{display:flex;min-height:calc(100vh - 58px);align-items:center;justify-content:center;padding:30px 16px}
.auth-card{width:100%;max-width:400px}
.auth-title{text-align:center;margin-bottom:6px}
.auth-sub{text-align:center;color:var(--text-dim);margin:0 0 20px}
.auth-foot{text-align:center;font-size:13px;color:var(--text-dim);margin-top:16px}

/* ---------- 首页 hero ---------- */
.hero{padding:52px 0 26px;text-align:center}
.hero h1{font-size:30px;margin:0 0 10px;letter-spacing:.5px}
.hero p{color:var(--text-dim);margin:0 0 4px}
.hero .stats{display:flex;gap:14px;justify-content:center;margin-top:22px;flex-wrap:wrap}
.stat-card{padding:14px 26px;border-radius:14px;background:var(--card);border:1px solid var(--card-border);text-align:center}
.stat-card b{display:block;font-size:24px;color:var(--accent)}
.stat-card span{font-size:12px;color:var(--text-dim)}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.quick-card{padding:20px;border-radius:var(--radius);background:var(--card);border:1px solid var(--card-border);
  transition:transform .15s,box-shadow .15s;display:block;color:var(--text)}
.quick-card:hover{transform:translateY(-3px);box-shadow:0 12px 30px rgba(0,0,0,.25)}
.quick-card b{font-size:16px}
.quick-card p{margin:6px 0 0;font-size:13px;color:var(--text-dim)}
.quick-card .ico{font-size:24px;margin-bottom:8px}

/* ---------- 兑换区 ---------- */
.exchange-box{max-width:640px;margin:26px auto}
.code-output{margin-top:16px;padding:16px;border-radius:12px;
  background:rgba(0,0,0,.32);border:1px dashed rgba(124,247,255,.4)}
.code-output .label{font-size:12px;color:#40e0d0;margin-bottom:8px}
.code-text{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:14px;line-height:1.7;
  color:#9fe4ff;word-break:break-all;white-space:pre-wrap;max-height:160px;overflow-y:auto;user-select:all}
.price-line{display:flex;align-items:baseline;gap:8px;font-size:14px}
.price-line b{font-size:22px;color:var(--gold)}

/* ---------- 应用下载 ---------- */
.apps-grid{display:grid;grid-template-columns:1fr;gap:14px;max-width:760px;margin:0 auto}
.app-card{display:flex;gap:16px;align-items:center;padding:18px;
  background:rgba(255,255,255,.045);border:1px solid var(--card-border);border-radius:14px}
.app-card .icon{width:60px;height:60px;border-radius:14px;object-fit:cover;flex-shrink:0;display:flex;align-items:center;justify-content:center;
  background:rgba(255,255,255,.08);border:1px solid var(--card-border)}
.app-card .icon img{width:100%;height:100%;object-fit:cover;border-radius:12px}
.app-card .info{flex:1;min-width:0}
.app-card .info b{font-size:16px;margin-right:8px}
.app-card .info .desc{color:var(--text-dim);font-size:13px;margin-top:4px;display:-webkit-box;
  -webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.app-card .meta{font-size:12px;color:var(--text-dim);margin-top:6px}
.dl-btn{flex-shrink:0}
.page-head{max-width:760px;margin:0 auto 18px}

/* ---------- 文章 ---------- */
.article-list .art{padding:18px;margin-bottom:14px}
.article-list .art h4{margin:0 0 6px;font-size:16px}
.article-list .art h4 a{color:var(--text)}
.article-list .art p{margin:0;color:var(--text-dim);font-size:13.5px}
.article-body{line-height:1.85;font-size:15px}
.article-body h1,.article-body h2,.article-body h3{margin:1.2em 0 .5em}
.article-body img{border-radius:10px}
.article-body blockquote{margin:14px 0;padding:10px 16px;border-left:3px solid var(--accent);
  background:rgba(255,255,255,.05);border-radius:0 10px 10px 0}
.article-body code{background:rgba(255,255,255,.1);padding:2px 6px;border-radius:6px;font-size:.9em}
.article-body pre{background:rgba(0,0,0,.35);padding:14px;border-radius:10px;overflow-x:auto}
.article-body table{border-collapse:collapse;width:100%}
.article-body td,.article-body th{border:1px solid var(--card-border);padding:8px 10px}

/* ---------- 富文本编辑器 ---------- */
.rte-toolbar{display:flex;flex-wrap:wrap;gap:4px;padding:8px;border:1px solid var(--card-border);
  border-radius:11px 11px 0 0;background:rgba(255,255,255,.05)}
body.admin .rte-toolbar{background:#f4f6fb}
.rte-toolbar button{padding:6px 10px;border:none;border-radius:7px;background:rgba(255,255,255,.08);
  color:var(--text);cursor:pointer;font-size:13px}
body.admin .rte-toolbar button{background:#e8edf7;color:#1c2434}
.rte-toolbar button:hover{background:var(--accent);color:#08111f}
.rte-box{min-height:300px;padding:14px;border:1px solid var(--card-border);border-top:none;
  border-radius:0 0 11px 11px;outline:none;background:rgba(255,255,255,.06);color:var(--text);line-height:1.7}
body.admin .rte-box{background:#fff;color:#1c2434}

/* ---------- 后台布局 ---------- */
.admin-body{display:flex;min-height:calc(100vh - 58px)}
.sidebar{width:196px;flex-shrink:0;padding:18px 12px;display:flex;flex-direction:column;gap:3px;
  border-right:1px solid var(--card-border)}
.sidebar a{padding:10px 14px;border-radius:10px;font-size:14px;color:var(--text-dim)}
.sidebar a:hover{color:var(--text);background:rgba(255,255,255,.06)}
.sidebar a.active{color:#1c2434;background:#e3ecff;font-weight:600}
.sidebar .g-tip{padding:16px 14px 6px;font-size:11px;color:var(--text-dim);letter-spacing:1px}
.admin-main{flex:1;padding:22px;min-width:0}
.admin-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px;flex-wrap:wrap;gap:10px}
.admin-head h2{margin:0;font-size:20px}
.chip{display:inline-block;padding:3px 10px;border-radius:999px;background:rgba(255,255,255,.07);
  border:1px solid var(--card-border);font-size:12px;color:var(--text-dim)}

/* ---------- 统计卡片 ---------- */
.stat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:14px;margin-bottom:20px}
.stat-grid .stat{padding:16px;border-radius:var(--radius);background:var(--card);border:1px solid var(--card-border)}
.stat .num{font-size:26px;font-weight:800;color:var(--accent)}
.stat .lbl{font-size:12.5px;color:var(--text-dim);margin-top:4px}

/* ---------- 页脚 ---------- */
.footer{margin-top:46px;padding:22px 0 30px;text-align:center;color:var(--text-dim);font-size:13px;
  border-top:1px solid rgba(255,255,255,.06)}

/* ---------- 弹层 ---------- */
.overlay{position:fixed;inset:0;background:rgba(5,8,20,.66);display:none;align-items:center;justify-content:center;z-index:100;padding:16px}
.overlay.show{display:flex}
.modal{width:100%;max-width:420px;padding:24px;border-radius:16px;background:#1b2440;border:1px solid rgba(124,247,255,.25);color:#eef2ff}
.modal h4{margin:0 0 14px}
.modal .close{float:right;background:none;border:none;color:#8fa3c8;font-size:18px;cursor:pointer}

/* ---------- 响应式 ---------- */
@media (max-width:860px){
  .grid2,.grid3{grid-template-columns:1fr}
  .sidebar{width:100%;flex-direction:row;overflow-x:auto;padding:10px}
  .sidebar a{white-space:nowrap}
  .admin-body{flex-direction:column}
  .userbox .uname{display:none}
  .stat-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:560px){
  .hero h1{font-size:24px}
  .topnav a{padding:8px 9px;font-size:13px}
  .app-card{flex-wrap:wrap}
  .dl-btn{width:100%}
  .app-card .dl-btn .btn{width:100%}
}
/* 文章列表增强 */
.article-list{max-width:760px;margin:0 auto}
.article-list .art{display:flex;gap:14px;text-decoration:none}
.article-list .art:hover{border-color:rgba(124,247,255,.35)}
.art-cover{width:120px;height:84px;object-fit:cover;border-radius:10px;flex-shrink:0}
.art-main{flex:1;min-width:0}
.art-main p{color:var(--text-dim);font-size:13.5px;margin:4px 0}
.art-main .meta{color:var(--text-dim);font-size:12px}
.art-detail-head{max-width:760px}
.article-body{max-width:760px;margin:0 auto;padding:26px}
.article-body img{max-width:100%;border-radius:10px}
.article-body a{color:var(--accent)}
.article-body h2,.article-body h3{margin:1.2em 0 .5em}
.article-body blockquote{border-left:3px solid var(--accent);margin:14px 0;padding:6px 14px;color:var(--text-dim);background:rgba(124,247,255,.05)}
.article-body pre{background:rgba(0,0,0,.3);padding:12px;border-radius:10px;overflow-x:auto}