/* ===== 亚欧 APS 学堂 · 统一站点样式（前台 + 后台，提取自 Ui::layout / Ui::adminLayout）=====
   版本：v3（外链化，配合 /aps/public/static/aps.css?v=N 查询串做更新失效）
   更新 CSS 后请同步递增调用处的 ?v= 版本号，避免浏览器/CDN 命中旧缓存。
   视觉规范与主站 51aps.com 对齐：深色顶栏(#0f2e4a) + 白色 sticky 导航 + 44px 方块 logo + 深色页脚。 */
:root{--brand:#1f4e79;--brand2:#245e94;--ink:#222;--muted:#6b7785;--line:#e6ebf2;--bg:#f6f8fb;--p:#1f4e79;--p2:#c8102e;--p3:#245e94;--fg:#222;--dark:#0f2e4a}
*{box-sizing:border-box}
body{margin:0;font-family:-apple-system,Segoe UI,Roboto,"Microsoft YaHei",sans-serif;color:var(--ink);background:var(--bg);line-height:1.6}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto;display:block}
.container{max-width:1200px;margin:0 auto;padding:0 20px}

/* ===== 顶栏（与主站 51aps.com 一致） ===== */
.topbar{background:var(--dark);color:#cbd6e6;font-size:12px;padding:7px 0}
.topbar .container{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap}
.topbar a{color:#cbd6e6;text-decoration:none;margin-left:16px;white-space:nowrap;transition:color .2s}
.topbar a:hover{color:#fff}
.topbar .top-right{display:flex;align-items:center;flex-wrap:wrap}
.topbar .top-right a:first-child{margin-left:0}

/* ===== 主导航（白色 sticky，方块 logo，与主站一致） ===== */
.navbar{background:#fff;box-shadow:0 1px 4px rgba(0,0,0,.06);position:sticky;top:0;z-index:100}
.navbar .container{display:flex;align-items:center;justify-content:space-between;gap:16px;height:72px;position:relative}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;min-width:0}
.brand .logo{height:44px;min-width:44px;width:auto;padding:0 9px;border-radius:6px;background:linear-gradient(135deg,var(--p),var(--p3));color:#fff;font-weight:700;font-size:15px;letter-spacing:.5px;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.brand .brand-text{display:flex;flex-direction:column;justify-content:center;min-width:0}
.brand .name{font-size:18px;font-weight:700;color:var(--p);line-height:1.15;white-space:nowrap}
.brand .sub{font-size:12px;color:var(--muted);font-weight:400;margin-top:2px;white-space:nowrap}
.nav{display:flex;align-items:center;gap:2px;list-style:none;margin:0;padding:0;flex-wrap:wrap}
.nav li{list-style:none}
.nav a{display:block;padding:0 14px;height:72px;line-height:72px;font-size:14px;color:#333;font-weight:500;transition:color .2s}
.nav a:hover,.nav a.active{color:var(--p)}

/* 移动端汉堡按钮（CSS 纯切换，checkbox :checked 控制，无 JS 依赖） */
.nav-toggle{display:none;align-items:center;justify-content:center;width:42px;height:42px;
  border:none;background:transparent;color:var(--p);font-size:24px;line-height:1;cursor:pointer;
  margin-left:auto;-webkit-tap-highlight-color:transparent;flex-shrink:0}
.nav-toggle .bar{display:block;width:22px;height:2px;background:currentColor;position:relative}
.nav-toggle .bar::before,.nav-toggle .bar::after{content:"";position:absolute;left:0;width:22px;height:2px;background:currentColor;transition:transform .25s}
.nav-toggle .bar::before{top:-7px}
.nav-toggle .bar::after{top:7px}
.nav-toggle-cb{position:absolute;opacity:0;pointer-events:none;width:1px;height:1px;margin:0;padding:0;border:0}
.nav-toggle-cb:checked ~ .nav-toggle .bar{background:transparent}
.nav-toggle-cb:checked ~ .nav-toggle .bar::before{transform:translateY(7px) rotate(45deg)}
.nav-toggle-cb:checked ~ .nav-toggle .bar::after{transform:translateY(-7px) rotate(-45deg)}

.subnav{display:flex;gap:8px;flex-wrap:wrap;margin:4px 0 16px}
.subnav a{padding:6px 13px;border:1px solid var(--line);border-radius:8px;text-decoration:none;color:var(--ink);font-size:14px}
.subnav a:hover{border-color:var(--p)}
.subnav a.active{background:var(--p);color:#fff;border-color:var(--p)}
.row{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.row>*{margin:0}
textarea{min-height:120px}
label{display:block;margin:10px 0 4px;font-weight:600;font-size:14px}
input,select,textarea{width:100%;padding:9px 11px;border:1px solid var(--line);border-radius:8px;font-size:14px;font-family:inherit}
.btn{display:inline-block;background:var(--p);color:#fff;border:none;padding:10px 18px;border-radius:4px;font-size:14px;font-weight:600;cursor:pointer;text-decoration:none}
.btn.sec{background:#fff;color:var(--p);border:1px solid var(--p)}
.btn.danger{background:#dc2626;color:#fff}
.btn.sm{padding:5px 12px;font-size:13px}
main{max-width:960px;margin:0 auto;padding:26px 20px 60px}
.card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px 20px;margin:16px 0;box-shadow:0 1px 2px rgba(0,0,0,.03);transition:transform .18s,box-shadow .18s}
.card:hover{transform:translateY(-4px);box-shadow:0 8px 22px rgba(31,78,121,.10)}
section.card h2{border-left:4px solid var(--p);padding-left:10px;margin-top:.8em}
h1{font-size:24px;margin:.2em 0 .4em}
h2{font-size:19px;margin:.6em 0 .3em}
p{margin:.4em 0}
.muted{color:var(--muted);font-size:14px}
.badge{display:inline-block;padding:3px 10px;border-radius:999px;font-size:12px;font-weight:600}
.badge.ok{background:#dcfce7;color:#166534}
.badge.warn{background:#fef9c3;color:#854d0e}
.badge.off{background:#fee2e2;color:#991b1b}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:14px}
.tile{display:block;text-decoration:none;color:inherit;background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px;transition:.15s}
.tile:hover{border-color:var(--p);box-shadow:0 4px 14px rgba(31,78,121,.14)}
.tile b{display:block;font-size:15px;margin-bottom:4px}
.tile span{color:var(--muted);font-size:13px}
table{width:100%;border-collapse:collapse;font-size:14px}
th,td{text-align:left;padding:9px 10px;border-bottom:1px solid var(--line)}
th{color:var(--muted);font-weight:600;background:#fafafa}
footer{background:var(--dark);color:#cbd6e6;font-size:12.5px;line-height:1.8;padding:26px 0;margin-top:24px}
footer .container{max-width:1200px;margin:0 auto;padding:0 20px}
footer b{color:#fff}
footer p{margin:.2em 0}
footer .foot-links{margin-top:10px}
footer a{color:#9db4d6;text-decoration:none}
footer a:hover{color:#fff;text-decoration:underline}
.alert{background:#fff7ed;border:1px solid #fed7aa;color:#9a3412;padding:12px 14px;border-radius:10px;font-size:13.5px}
code{background:#f1f5f9;padding:1px 6px;border-radius:5px;font-size:13px}
ol li{margin:6px 0}
button,input,select,textarea,label,nav a{touch-action:manipulation}
.btn{cursor:pointer;-webkit-tap-highlight-color:transparent;touch-action:manipulation}
.recActions{display:flex;flex-wrap:wrap;gap:8px;margin:8px 0;position:relative;z-index:2}
.recActions .btn{flex:1 1 140px;min-height:46px;justify-content:center}
.bi{display:inline-flex;flex-direction:column;line-height:1.35}
.bi-en{font-size:12px;color:var(--muted);font-weight:500;letter-spacing:.2px}
.bi-zh{font-size:14px;color:var(--ink);font-weight:600}
th .bi,td .bi{line-height:1.25}
th .bi-en,td .bi-en{font-size:11px}
th .bi-zh,td .bi-zh{font-size:13px}
.tile .bi-en{font-size:11.5px}
.tile .bi-zh{font-size:14px}
@supports(padding:max(0px)){
  .container{padding-left:max(20px,env(safe-area-inset-left));padding-right:max(20px,env(safe-area-inset-right))}
  main{padding-left:max(20px,env(safe-area-inset-left));padding-right:max(20px,env(safe-area-inset-right))}
}
/* ===== 移动端自适应（与主站节奏一致） ===== */
@media (max-width:1100px){
  .brand .sub{display:none}
}
@media (max-width:900px){
  .navbar .container{height:auto;flex-wrap:wrap;padding:10px 16px;gap:10px}
  .nav-toggle{display:flex}
  .nav{display:none;width:100%;flex-direction:column;align-items:stretch;gap:0;
    box-shadow:0 12px 30px rgba(15,46,74,.18);border-top:1px solid #eef2f7}
  .nav-toggle-cb:checked ~ .nav{display:flex}
  .nav li{width:100%;border-bottom:1px solid #f1f4f8}
  .nav li:last-child{border-bottom:none}
  .nav a{height:auto;line-height:1.5;padding:13px 14px;width:100%}
  main{padding:18px 16px 56px}
  .card{padding:14px;margin:12px 0}
}
@media (max-width:768px){
  .topbar .container{font-size:11px;flex-wrap:wrap;row-gap:2px}
  .topbar a{margin-left:12px}
  h1{font-size:21px}
  h2{font-size:17px}
  .grid{grid-template-columns:1fr}
  .row{flex-direction:column}
  .row>*{width:100%}
  table{display:block;width:100%;overflow-x:auto;-webkit-overflow-scrolling:touch;white-space:nowrap}
}
@media (max-width:480px){
  .navbar .container{padding:8px 12px}
  .brand .name{font-size:16px}
  .brand .logo{height:38px;min-width:38px;width:auto;padding:0 6px;font-size:13px}
  .nav a{font-size:15px}
  main{padding:14px 12px 52px}
  .card{padding:12px}
  .btn{padding:12px 16px;font-size:15px;min-height:44px}
  h1{font-size:19px}
  h2{font-size:16px}
}
/* ===== 后台布局 ===== */
.admin{display:flex;min-height:100vh}
.side{width:210px;background:var(--dark);color:#cbd5e1;padding:18px 12px;flex-shrink:0}
.side .logo{color:#fff;font-weight:700;font-size:16px;padding:6px 10px 14px;border-bottom:1px solid #1e293b;margin-bottom:10px}
.side a{display:block;color:#cbd5e1;text-decoration:none;padding:9px 12px;border-radius:8px;font-size:14px;margin:3px 0}
.side a:hover,.side a.active{background:var(--p);color:#fff}
.side .sep{height:1px;background:#1e293b;margin:12px 4px}
.side .sub{font-size:12px;color:#94a3b8;padding:6px 12px}
.main{flex:1;display:flex;flex-direction:column}
.topbar-admin{background:#fff;border-bottom:1px solid var(--line);padding:12px 22px;display:flex;justify-content:space-between;align-items:center}
.topbar-admin .who{font-size:13px;color:var(--muted)}
.topbar-admin a{color:var(--p);text-decoration:none;font-size:13px;margin-left:14px}
.content{padding:22px;max-width:1100px;width:100%}
.stat{background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px}
.stat b{display:block;font-size:26px;color:var(--p)}
.stat span{color:var(--muted);font-size:13px}
form label{display:block;font-size:13px;color:var(--muted);margin:12px 0 4px}
input[type=text],input[type=password],textarea,select{width:100%;padding:9px 11px;border:1px solid var(--line);border-radius:8px;font-size:14px;font-family:inherit;background:#fff;color:var(--ink)}
textarea{min-height:90px;resize:vertical}
.row > div{flex:1;min-width:200px}
.opt{display:flex;gap:8px;align-items:center;margin:5px 0}
.btn.sec{background:#e5e7eb;color:#1f2937}
.btn.danger{background:#dc2626}
.ok{background:#f0fdf4;border:1px solid #bbf7d0;color:#166534}
a.link{color:var(--p);text-decoration:none}
a.del{color:#dc2626;text-decoration:none}
.btn:disabled{opacity:.5;cursor:not-allowed}
/* ===== 注册协议弹窗 ===== */
.agree-row{display:flex;align-items:flex-start;gap:10px;margin:16px 0 4px;padding:12px 14px;border:1px solid var(--line);border-radius:10px;background:#f8fafc}
.agree-row input[type=checkbox]{width:18px;height:18px;margin-top:2px;flex-shrink:0;accent-color:var(--p);cursor:pointer}
.agree-row label{margin:0;font-weight:500;font-size:14px;line-height:1.5;cursor:pointer}
.agree-row a.link{font-weight:600}
.modal-mask{position:fixed;inset:0;background:rgba(15,46,74,.55);display:flex;align-items:center;justify-content:center;padding:20px;z-index:1000}
.modal-mask[hidden]{display:none}
.modal{background:#fff;border-radius:14px;width:100%;max-width:760px;max-height:86vh;display:flex;flex-direction:column;box-shadow:0 20px 60px rgba(15,46,74,.35);overflow:hidden;animation:modalIn .2s ease-out}
@keyframes modalIn{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}
.modal-head{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;border-bottom:1px solid var(--line);flex-shrink:0}
.modal-head h3{margin:0;font-size:18px;color:var(--p);font-weight:700}
.modal-close{border:none;background:transparent;font-size:26px;line-height:1;color:var(--muted);cursor:pointer;padding:0 4px}
.modal-close:hover{color:var(--p)}
.modal-body{overflow-y:auto;padding:18px 22px;font-size:14px;line-height:1.75;color:var(--ink)}
.modal-body h4{font-size:15px;margin:18px 0 6px;color:var(--p);font-weight:600}
.modal-body h4:first-of-type{margin-top:2px}
.modal-body ol{margin:6px 0 6px 2px;padding-left:20px}
.modal-body li{margin:5px 0}
.modal-foot{padding:14px 20px;border-top:1px solid var(--line);display:flex;gap:10px;justify-content:flex-end;flex-shrink:0}
@media (max-width:768px){
  .admin{flex-direction:column}
  .side{width:100%;display:flex;flex-wrap:wrap;gap:4px;align-items:center;padding:10px 12px}
  .side .logo{width:100%;border-bottom:none;padding:0 0 6px;margin-bottom:0}
  .side .sep,.side .sub{display:none}
  .side a{margin:2px 0}
  .content{padding:14px 12px}
  .grid{grid-template-columns:1fr}
  .row{flex-direction:column}
  .row>div{min-width:0}
  table{display:block;width:100%;overflow-x:auto;-webkit-overflow-scrolling:touch;white-space:nowrap}
}