/* =========================================================
   CDK 系统 · 设计系统（大白底 Apple 风）
   令牌 → 骨架 → 组件 → 动效，统一驱动 admin / index
   仅用 Apple 蓝 + 系统灰阶 + 绿/红/黄状态色，无紫渐变、无 emoji 图标
   深色模式仅跟随系统（prefers-color-scheme），无手动切换器
   ========================================================= */

/* ---------- 1. 设计令牌 ---------- */
:root{
  --blue:#0071e3; --blue-hover:#0077ed;
  --ink:#1d1d1f; --gray:#6e6e73; --muted:#86868b;
  --line:#d2d2d7; --soft:#f5f5f7;
  --green:#34c759; --red:#ff3b30; --yellow:#ff9f0a;
  --bg:#ffffff; --card:#ffffff;
  --nav-bg:rgba(255,255,255,.72); --nav-border:rgba(0,0,0,.08);
  --input-bg:#ffffff; --row-hover:#fafafa; --stat-label:#6e6e73;
  --card-shadow:0 1px 3px rgba(0,0,0,.06),0 12px 40px rgba(0,0,0,.04);
  --radius:18px; --radius-sm:12px; --space:22px;
  --font:-apple-system,BlinkMacSystemFont,"PingFang SC","Helvetica Neue",Helvetica,Arial,"Microsoft YaHei",sans-serif;
  --logo-filter:none; /* 深色模式下反白 logo */
}
@media (prefers-color-scheme: dark){
  :root{
    --blue:#2997ff; --blue-hover:#2997ff;
    --ink:#f5f5f7; --gray:#a1a1a6; --muted:#86868b;
    --line:rgba(255,255,255,.12); --soft:#1d1d1f;
    --green:#30d158; --red:#ff453a; --yellow:#ffd60a;
    --bg:#000000; --card:#1d1d1f;
    --nav-bg:rgba(20,20,22,.72); --nav-border:rgba(255,255,255,.12);
    --input-bg:#1d1d1f; --row-hover:rgba(255,255,255,.05); --stat-label:#a1a1a6;
    --card-shadow:0 1px 3px rgba(0,0,0,.5),0 12px 40px rgba(0,0,0,.55);
    --logo-filter:brightness(0) invert(1);
  }
}

/* ---------- 2. 基础 ---------- */
*{margin:0;padding:0;box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  font-family:var(--font); color:var(--ink); background:var(--bg);
  line-height:1.5; -webkit-font-smoothing:antialiased;
  transition:background .4s ease,color .4s ease;
}
a{color:var(--blue);text-decoration:none;}
a:hover{text-decoration:underline;}

@keyframes fadeUp{from{opacity:0;transform:translateY(12px);}to{opacity:1;transform:none;}}
@media (prefers-reduced-motion: no-preference){
  .hero,.card{animation:fadeUp .5s ease both;}
}

/* ---------- 3. 导航（吸顶毛玻璃） ---------- */
.nav{
  position:sticky; top:0; z-index:50; height:52px;
  display:flex; align-items:center; justify-content:space-between;
  padding:0 max(22px,calc((100% - 1100px)/2));
  background:var(--nav-bg);
  backdrop-filter:saturate(180%) blur(20px); -webkit-backdrop-filter:saturate(180%) blur(20px);
  border-bottom:1px solid var(--nav-border);
}
.nav .brand{display:flex;align-items:center;gap:9px;font-size:15px;font-weight:600;color:var(--ink);text-decoration:none;}
.nav .brand:hover{text-decoration:none;}
.nav .brand img{height:26px;width:auto;border-radius:6px;filter:var(--logo-filter);display:inline-block;}
.nav .links{display:flex;align-items:center;gap:22px;}
.nav .links a{color:var(--gray);font-size:14px;font-weight:500;}
.nav .links a:hover{color:var(--ink);text-decoration:none;}
.nav .links a.active{color:var(--ink);font-weight:600;}
.nav .links .who{color:var(--muted);font-size:14px;}

/* ---------- 4. 布局骨架 ---------- */
.hero{text-align:center;padding:88px 22px 44px;max-width:760px;margin:0 auto;}
.hero .eyebrow{font-size:14px;color:var(--blue);font-weight:600;letter-spacing:.02em;margin-bottom:14px;}
.hero h1{font-size:clamp(40px,6vw,68px);font-weight:700;letter-spacing:-.02em;line-height:1.05;}
.hero p{margin-top:18px;font-size:19px;color:var(--gray);}
.wrap{max-width:1024px;margin:0 auto;padding:0 22px 80px;}
.wrap-narrow{max-width:760px;margin:0 auto;padding:0 22px 80px;}
.wrap-wide{max-width:1180px;margin:0 auto;padding:0 22px 80px;}
/* 无刷新切换：内容淡出/淡入（沿用 fadeUp 的动效语言） */
#pageMain{transition:opacity .22s ease, transform .22s ease;}
.center{text-align:center;}

/* ---------- 5. 卡片 ---------- */
.card{
  background:var(--card); border-radius:var(--radius); box-shadow:var(--card-shadow);
  padding:28px; margin-bottom:24px; transition:background .4s,box-shadow .4s;
}
.card-title{font-size:22px;font-weight:600;letter-spacing:-.01em;margin-bottom:20px;}

/* ---------- 6. 按钮 ---------- */
.btn{
  height:44px; padding:0 22px; border:none; border-radius:12px;
  font-size:15px; font-weight:500; cursor:pointer; font-family:inherit;
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  transition:background .2s,transform .1s,filter .2s;
}
.btn:active{transform:scale(.97);}
/* 禁用态：人机验证通过前兑换按钮不可点击 */
.btn:disabled{opacity:.45;cursor:not-allowed;transform:none;filter:grayscale(.35);pointer-events:none;}
.btn-primary{background:var(--blue);color:#fff;}
.btn-primary:hover{background:var(--blue-hover);}
.btn-success{background:var(--green);color:#fff;}
.btn-success:hover{filter:brightness(1.05);}
.btn-ghost{background:rgba(0,0,0,.05);color:var(--ink);}
.btn-ghost:hover{background:rgba(0,0,0,.09);}
.btn-sm{height:34px;padding:0 14px;font-size:13px;border-radius:9px;}
.btn-block{width:100%;}
@media (prefers-color-scheme: dark){
  .btn-ghost{background:rgba(255,255,255,.1);}
  .btn-ghost:hover{background:rgba(255,255,255,.16);}
}
.btn:hover{text-decoration:none;}

/* ---------- 7. 表单 ---------- */
.form-group{margin-bottom:18px;}
.label{display:block;font-size:14px;font-weight:600;margin-bottom:8px;color:var(--ink);}
.hint{font-size:13px;color:var(--muted);margin-top:6px;}
.field{
  width:100%; height:46px; padding:0 16px; font-size:15px; font-family:inherit;
  color:var(--ink); background:var(--input-bg);
  border:1px solid var(--line); border-radius:12px; transition:border-color .2s,box-shadow .2s;
}
.field:focus{outline:none;border-color:var(--blue);box-shadow:0 0 0 3px rgba(0,113,227,.18);}
textarea.field{height:auto;padding:12px 16px;resize:vertical;line-height:1.5;
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;}
select.field{
  appearance:none; -webkit-appearance:none;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%236e6e73' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat:no-repeat; background-position:right 16px center; padding-right:40px;
}
@media (prefers-color-scheme: dark){ select.field{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%23a1a1a6' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");} }

/* ---------- 8. 提示条 ---------- */
.alert{border-radius:12px;padding:15px 18px;margin-bottom:18px;font-size:15px;line-height:1.5;}
.alert-success{background:rgba(52,199,89,.12);color:#1d7a36;}
.alert-error{background:rgba(255,59,48,.10);color:#c0342c;}
.alert-info{background:rgba(0,113,227,.10);color:#0058b0;}
.alert-warning{background:rgba(255,159,10,.14);color:#9a6200;}
@media (prefers-color-scheme: dark){
  .alert-success{color:#5fd97b;} .alert-error{color:#ff7b73;}
  .alert-info{color:#6db4ff;} .alert-warning{color:#ffc14d;}
}

/* ---------- 9. 徽标（状态药丸） ---------- */
.badge{display:inline-flex;align-items:center;gap:5px;font-size:12px;font-weight:600;
  padding:4px 10px;border-radius:999px;line-height:1;white-space:nowrap;}
.badge-blue{background:rgba(0,113,227,.12);color:var(--blue);}
.badge-green{background:rgba(52,199,89,.14);color:#1d7a36;}
.badge-red{background:rgba(255,59,48,.12);color:#c0342c;}
.badge-gray{background:rgba(110,110,115,.14);color:var(--gray);}
.badge-yellow{background:rgba(255,159,10,.16);color:#9a6200;}
@media (prefers-color-scheme: dark){
  .badge-green{color:#5fd97b;} .badge-red{color:#ff7b73;} .badge-yellow{color:#ffc14d;}
}

/* ---------- 10. 统计卡 ---------- */
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;}
.stat{border:1px solid var(--line);border-radius:16px;padding:26px 18px;text-align:center;background:var(--soft);transition:background .4s;}
.stat b{display:block;font-size:clamp(34px,5vw,52px);font-weight:700;font-variant-numeric:tabular-nums;
  line-height:1;letter-spacing:-.02em;}
.stat span{display:block;font-size:14px;color:var(--stat-label);margin-top:10px;}
@media (max-width:760px){.stat-grid{grid-template-columns:repeat(2,1fr);}}

/* ---------- 11. 表格 ---------- */
.table-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch;}
.table{width:100%;border-collapse:collapse;font-size:14px;min-width:720px;}
.table th{font-size:12px;font-weight:600;text-transform:uppercase;letter-spacing:.04em;
  color:var(--muted);text-align:left;padding:12px 16px;border-bottom:1px solid var(--line);white-space:nowrap;}
.table td{padding:14px 16px;border-bottom:1px solid var(--line);color:var(--ink);vertical-align:middle;}
.table tbody tr{transition:background .15s;}
.table tbody tr:hover{background:var(--row-hover);}
.table tbody tr:last-child td{border-bottom:none;}
.table code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:13px;color:var(--blue);}

/* ---------- 12. 筛选标签（分段） ---------- */
.tabs{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:20px;}
.tabs a{padding:8px 16px;border-radius:999px;font-size:14px;font-weight:500;color:var(--gray);
  background:var(--soft);transition:color .15s,background .15s;}
.tabs a:hover{color:var(--ink);text-decoration:none;}
.tabs a.active{background:var(--blue);color:#fff;}

/* ---------- 13. 分页 ---------- */
.pager{display:flex;justify-content:center;align-items:center;gap:6px;margin-top:18px;flex-wrap:wrap;}
.pager a,.pager span{padding:8px 14px;border-radius:10px;font-size:14px;color:var(--gray);
  background:var(--soft);min-width:40px;text-align:center;transition:color .15s,background .15s;}
.pager a:hover{color:var(--ink);text-decoration:none;background:rgba(0,0,0,.06);}
.pager a.active{background:var(--blue);color:#fff;}
.pager span.disabled{opacity:.4;}
@media (prefers-color-scheme: dark){.pager a,.pager span{background:rgba(255,255,255,.08);}}

/* ---------- 14. 进度条（API 配额） ---------- */
.progress{height:8px;background:var(--soft);border-radius:999px;overflow:hidden;}
.progress > i{display:block;height:100%;background:var(--green);border-radius:999px;transition:width .4s ease;}
.progress > i.warn{background:var(--yellow);}
.progress > i.danger{background:var(--red);}

/* ---------- 15. CDK 信息预览块 ---------- */
.preview{background:var(--soft);border-radius:14px;padding:18px 22px;margin-bottom:20px;}
.preview-row{display:flex;justify-content:space-between;align-items:center;gap:16px;
  padding:11px 0;border-bottom:1px solid var(--line);font-size:15px;}
.preview-row:last-child{border-bottom:none;}
.preview-row .k{color:var(--gray);}
.notice{display:flex;gap:10px;align-items:flex-start;background:rgba(255,159,10,.12);
  border-radius:12px;padding:14px 16px;font-size:14px;color:#9a6200;margin-top:18px;line-height:1.5;}
@media (prefers-color-scheme: dark){.notice{color:#ffc14d;}}

/* ---------- 16. 双栏网格 ---------- */
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:24px;}
.grid-2 > .card{margin-bottom:0;}
@media (max-width:880px){.grid-2{grid-template-columns:1fr;gap:24px;}}

/* ---------- 17. API Key 卡片 ---------- */
.api-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:16px;}
.api-key-card{border:1px solid var(--line);border-radius:14px;padding:18px;background:var(--soft);}
.api-key-card h6{font-size:14px;font-weight:600;margin-bottom:14px;word-break:break-all;}
.api-key-card .meter-label{font-size:13px;color:var(--muted);margin:6px 0 8px;}
.api-key-meta{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:14px;
  border-top:1px solid var(--line);padding-top:14px;}
.api-key-meta b{display:block;font-size:18px;font-weight:700;font-variant-numeric:tabular-nums;}
.api-key-meta span{font-size:12px;color:var(--muted);}
.api-key-card.fail{color:var(--red);}

/* ---------- 18. 页脚 ---------- */
.footer{border-top:1px solid var(--nav-border);background:var(--soft);
  padding:28px 22px;text-align:center;color:var(--muted);font-size:13px;}
.footer a{color:var(--gray);}

/* ---------- 19. 状态图标（仅真实状态，非装饰） ---------- */
.status-icon{width:56px;height:56px;border-radius:50%;display:inline-flex;align-items:center;
  justify-content:center;background:rgba(52,199,89,.12);color:var(--green);margin-bottom:18px;}
.status-icon svg{width:30px;height:30px;}

/* 兑换成功动画：图标弹性出现，对勾描边画出（尊重系统减弱动效设置） */
@keyframes popIn{0%{opacity:0;transform:scale(.4);}60%{opacity:1;transform:scale(1.08);}100%{opacity:1;transform:scale(1);}}
@keyframes drawCheck{to{stroke-dashoffset:0;}}
@media (prefers-reduced-motion: no-preference){
  .status-icon{animation:popIn .45s cubic-bezier(.34,1.56,.64,1) both;}
  .status-icon svg path{stroke-dasharray:26;stroke-dashoffset:26;animation:drawCheck .35s .18s ease-out forwards;}
}

/* ---------- 20. 确认弹窗（替代系统 confirm） ---------- */
.modal-overlay{position:fixed;inset:0;background:rgba(0,0,0,.4);display:flex;align-items:center;
  justify-content:center;padding:22px;z-index:100;opacity:0;visibility:hidden;
  transition:opacity .2s ease,visibility .2s ease;}
.modal-overlay.show{opacity:1;visibility:visible;}
.modal{background:var(--card);border-radius:18px;max-width:340px;width:100%;padding:26px 24px 20px;
  text-align:center;box-shadow:var(--card-shadow);transform:scale(.96);transition:transform .2s ease;}
.modal-overlay.show .modal{transform:scale(1);}
.modal h3{font-size:18px;font-weight:600;margin-bottom:10px;color:var(--ink);}
.modal p{font-size:15px;color:var(--gray);margin-bottom:22px;line-height:1.5;}
.modal .modal-actions{display:flex;gap:12px;}
.modal .modal-actions .btn{flex:1;}
.modal .btn-cancel{background:rgba(0,0,0,.06);color:var(--ink);}
.modal .btn-cancel:hover{background:rgba(0,0,0,.1);}
@media (prefers-color-scheme: dark){
  .modal .btn-cancel{background:rgba(255,255,255,.12);}
  .modal .btn-cancel:hover{background:rgba(255,255,255,.18);}
}