/* AI 教练 · 全站共享样式（变量、顶栏、按钮、表单、页脚、账号、后台、协议）
   首页专属样式在 home.css。v2：纸面 + 网格的「训练手册」基调。 */
:root{
  --blue:#2B44F0;
  --blue-ink:#1A2BB8;
  --lime:#C8F31D;
  --orange:#FF5A1F;
  --orange-ink:#C2410C;
  --ink:#000;
  --white:#fff;
  --paper:#FBFAF5;
  --paper-2:#F3F1E8;
  --chalk:#F1F3FF;
  --mint:#7FD9AE;
  --text-2:#3D4157;
  --muted:#5B6075;
  --rule:#C9CEDF;
  --hair:#E3E1D6;
  --line:2px solid var(--ink);
  --hard:6px 6px 0 var(--ink);
  --hard-sm:3px 3px 0 var(--ink);
  --hard-lg:10px 10px 0 var(--ink);
  --soft:0 1px 0 rgba(0,0,0,.04),0 12px 30px -12px rgba(20,24,60,.22);
  --display:"Smiley Sans Oblique","PingFang SC","Microsoft YaHei",sans-serif;
  --sans:"PingFang SC","HarmonyOS Sans SC","MiSans","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  --mono:"SF Mono","Cascadia Mono","Cascadia Code",Consolas,"Courier New",monospace;
  --wrap:1180px;
  --ease:cubic-bezier(.2,.8,.2,1);
}

*,*::before,*::after{box-sizing:border-box}
*{margin:0;padding:0}
[hidden]{display:none!important}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:84px}
body{font-family:var(--sans);font-size:17px;line-height:1.75;color:var(--ink);background:var(--paper);-webkit-font-smoothing:antialiased;overflow-x:hidden}
img,svg,video{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
ul,ol{list-style:none}
strong{font-weight:800}
:focus-visible{outline:3px solid var(--orange);outline-offset:3px;border-radius:6px}

.display{font-family:var(--display);font-weight:400;line-height:1.1;letter-spacing:.005em}
h2.display{font-size:clamp(34px,4.4vw,58px);margin-bottom:18px}
.wrap{width:min(var(--wrap),calc(100% - 48px));margin-inline:auto}
.skip{position:absolute;left:16px;top:-60px;z-index:100;padding:8px 14px;background:var(--lime);border:var(--line);border-radius:10px;font-weight:800}
.skip:focus{top:12px}

/* ---------- 顶栏 ---------- */
.topbar{position:sticky;top:0;z-index:50;background:rgba(251,250,245,.92);-webkit-backdrop-filter:saturate(1.4) blur(10px);backdrop-filter:saturate(1.4) blur(10px);border-bottom:1.5px solid var(--ink)}
.topbar-in{display:flex;align-items:center;gap:20px;height:66px}
.brand{display:flex;align-items:center;gap:10px;font-family:var(--display);font-size:26px;line-height:1}
.brand img{width:28px}
.nav{display:flex;gap:2px;margin-left:16px}
.nav a{padding:6px 12px;border-radius:999px;font-size:15px;font-weight:700;color:var(--text-2);transition:background .15s,color .15s}
.nav a:hover{background:var(--paper-2);color:var(--ink)}
.topbar-cta{margin-left:auto;display:flex;align-items:center;gap:16px}
.topbar-login{font-size:15px;font-weight:700;color:var(--text-2);padding:6px 4px;border-radius:6px}
.topbar-login:hover{color:var(--ink);text-decoration:underline;text-underline-offset:4px}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:11px 22px;border:var(--line);border-radius:999px;background:var(--white);color:var(--ink);font-weight:800;font-size:16px;line-height:1.2;white-space:nowrap;box-shadow:var(--hard-sm);transition:transform .14s var(--ease),box-shadow .14s var(--ease),background .14s}
.btn:hover{transform:translate(-2px,-2px);box-shadow:5px 5px 0 var(--ink)}
.btn:active{transform:translate(2px,2px);box-shadow:1px 1px 0 var(--ink)}
.btn-lime{background:var(--lime)}
.btn-ink{background:var(--ink);color:var(--lime)}
.btn-ink:hover{box-shadow:5px 5px 0 var(--lime),5px 5px 0 1.5px var(--ink)}
.btn-ghost{background:transparent;box-shadow:none}
.btn-ghost:hover{background:var(--white);box-shadow:var(--hard-sm)}
.btn-quiet{background:var(--white);box-shadow:none;border-width:1.5px;font-weight:700}
.btn-quiet:hover{box-shadow:var(--hard-sm)}
.btn-outline{background:transparent;color:var(--white);border-color:var(--white);box-shadow:3px 3px 0 rgba(0,0,0,.45)}
.btn-sm{min-height:38px;padding:7px 16px;font-size:14px;box-shadow:2px 2px 0 var(--ink)}
.btn-lg{min-height:54px;padding:15px 30px;font-size:18px}
.btn-block{width:100%}
.btn:disabled{opacity:.55;cursor:wait;transform:none!important;box-shadow:var(--hard-sm)!important}

/* ---------- 表单（首页预约 / 账号 / 后台共用） ---------- */
.reserve-badge{display:inline-block;margin-bottom:16px;padding:3px 14px;background:var(--orange);color:var(--ink);border:2px solid var(--ink);border-radius:999px;font-weight:800;font-size:14px;line-height:1.5;transform:rotate(-2deg)}
.field-row{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:14px}
.field{display:grid;gap:6px;font-weight:800;font-size:14px;line-height:1.5;align-content:start}
.field small{font-weight:600;color:var(--muted);margin-left:4px;font-size:12px}
.field input,.field select,.field textarea{width:100%;min-height:46px;padding:11px 14px;background:var(--white);border:2px solid var(--ink);border-radius:12px;font:inherit;font-size:16px;font-weight:500;color:var(--ink);outline:none;transition:background .15s ease,box-shadow .15s ease,border-color .15s}
.field input::placeholder,.field textarea::placeholder{color:#6E7286}
.field input:focus,.field select:focus,.field textarea:focus{box-shadow:0 0 0 4px rgba(43,68,240,.22);border-color:var(--blue)}
.field input[aria-invalid="true"]{border-color:var(--orange-ink);box-shadow:0 0 0 4px rgba(255,90,31,.18)}
.field-err{min-height:0;font-size:13px;font-weight:700;color:var(--orange-ink)}
.field-err:empty{display:none}
.field textarea{resize:vertical;min-height:70px}
.form-note{font-size:13px;color:var(--text-2);text-align:center;line-height:1.6}
.form-note a{text-decoration:underline;text-decoration-thickness:2px;text-underline-offset:3px}
.form-msg{margin:0;text-align:center;font-weight:800;color:var(--orange-ink);line-height:1.5}
.form-msg:empty{display:none}
kbd{display:inline-block;min-width:1.9em;padding:0 6px;background:var(--white);border:2px solid var(--ink);border-bottom-width:4px;border-radius:6px;font-family:var(--sans);font-size:14px;font-weight:800;line-height:1.6;text-align:center;color:var(--ink)}

/* ---------- 页脚 ---------- */
.foot{padding:40px 0;background:var(--ink);color:rgba(255,255,255,.78)}
.foot-in{display:flex;flex-wrap:wrap;align-items:center;gap:20px 36px}
.foot-brand{display:flex;align-items:center;gap:10px;color:var(--white);font-family:var(--display);font-size:24px;line-height:1}
.foot-brand img{width:24px}
.foot-links{display:flex;flex-wrap:wrap;gap:8px 22px;font-size:14px}
.foot-links a{padding:4px 0}
.foot-links a:hover{color:var(--lime)}
.foot-copy{margin-left:auto;font-size:13px}
.foot-icp a{margin-left:12px}
.foot-icp a:hover{color:var(--lime)}

/* ---------- 账号与登录 ---------- */
.auth-main{background:var(--blue);padding:70px 0 90px;min-height:calc(100vh - 65px)}
.auth-wrap{display:grid;grid-template-columns:minmax(0,1fr) minmax(380px,.86fr);gap:56px;align-items:center}
.auth-intro{color:var(--white)}
.auth-intro .reserve-badge{background:var(--lime);color:var(--ink)}
.auth-intro h1{font-size:clamp(34px,4.2vw,56px);line-height:1.2;text-shadow:4px 4px 0 var(--ink);margin-bottom:18px}
.auth-intro > p{font-size:18px;line-height:1.75;max-width:32em}
.auth-points{display:grid;gap:10px;margin-top:24px;font-weight:700}
.auth-points li{position:relative;padding-left:30px}
.auth-points li::before{content:"";position:absolute;left:0;top:.28em;width:18px;height:18px;border:2px solid var(--ink);border-radius:50%;background:var(--lime)}
.auth-card{background:var(--white);border:var(--line);border-radius:26px;box-shadow:12px 12px 0 var(--ink);padding:32px 30px;color:var(--ink)}
.auth-card h2{font-size:clamp(26px,2.4vw,34px);line-height:1.25;margin-bottom:6px}
.auth-sub{color:var(--text-2);font-size:15px;margin-bottom:20px}
.auth-tabs{display:flex;gap:8px;padding:5px;background:var(--chalk);border:2px solid var(--ink);border-radius:999px;margin-bottom:20px}
.auth-tabs button{flex:1;padding:8px 12px;border-radius:999px;font-weight:800;font-size:15px;line-height:1.4}
.auth-tabs button[aria-selected="true"]{background:var(--ink);color:var(--white)}
.auth-form{display:grid;gap:14px}
.auth-form[hidden],.auth-guest[hidden],.account-panel[hidden]{display:none}
.password-wrap{position:relative;display:flex;align-items:center}
.password-wrap input{padding-right:64px}
.password-wrap button{position:absolute;right:10px;padding:4px 8px;font-size:13px;font-weight:800;text-decoration:underline;text-underline-offset:3px}
.auth-check{display:flex;align-items:flex-start;gap:8px;font-size:14px;font-weight:600;line-height:1.5;color:var(--text-2)}
.auth-check input{width:18px;height:18px;margin-top:2px;accent-color:var(--blue)}
.auth-check a{text-decoration:underline;text-underline-offset:3px;color:var(--ink)}
.btn-block{width:100%}
.btn:disabled{opacity:.55;cursor:wait;transform:none!important;box-shadow:var(--hard-sm)!important}
.btn-wechat{background:var(--lime);color:var(--ink)}
.btn-wechat.is-disabled{opacity:.55;cursor:not-allowed;background:var(--chalk);color:var(--text-2)}
.auth-sep{display:flex;align-items:center;gap:12px;margin:18px 0;color:var(--text-2);font-size:13px}
.auth-sep::before,.auth-sep::after{content:"";flex:1;height:2px;background:var(--rule)}
.auth-hint{font-size:13px;line-height:1.6;color:var(--text-2);text-align:center;margin-top:8px}
.auth-hint b{color:var(--orange)}
.auth-loading{text-align:center;color:var(--text-2);padding:26px 0}
.auth-banner{margin-bottom:16px;padding:10px 14px;background:var(--chalk);border:2px solid var(--ink);border-radius:12px;font-size:14px;font-weight:700}
.auth-banner.is-ok{background:var(--lime)}
.auth-banner.is-error{background:#FFE3D8}
.account-head{display:flex;align-items:center;gap:16px;padding-bottom:20px;border-bottom:2px dashed var(--rule);margin-bottom:20px}
.account-avatar{display:grid;place-items:center;flex:none;width:62px;height:62px;background:var(--lime);border:var(--line);border-radius:50%;font-family:var(--display);font-size:30px;overflow:hidden}
.account-avatar img{width:100%;height:100%;object-fit:cover}
.account-head h2{font-size:26px;line-height:1.25;margin-bottom:2px}
.account-head p{font-size:14px;color:var(--text-2);word-break:break-all}
.account-label{display:inline-block;margin-bottom:8px;padding:2px 10px;background:var(--chalk);border:2px solid var(--ink);border-radius:999px;font-size:12px;font-weight:800}
.account-reservation{padding:18px;background:var(--chalk);border:2px solid var(--ink);border-radius:16px;margin-bottom:18px}
.account-reservation h3{font-family:var(--display);font-size:22px;font-weight:400;line-height:1.3;margin-bottom:8px}
.account-reservation dl{display:grid;gap:6px;font-size:14px}
.account-reservation dl > div{display:grid;grid-template-columns:6em 1fr;gap:8px}
.account-reservation dt{color:var(--text-2)}
.account-reservation dd{font-weight:700;word-break:break-word}
.account-actions{display:flex;flex-wrap:wrap;gap:10px}
.account-note{font-size:13px;color:var(--text-2);line-height:1.7;margin-top:16px}
.account-note a{text-decoration:underline;text-underline-offset:3px;font-weight:700}

/* ---------- 内测后台 ---------- */
.admin-main{padding:56px 0 90px;background:var(--chalk);min-height:calc(100vh - 65px)}
.admin-head{display:flex;flex-wrap:wrap;align-items:end;justify-content:space-between;gap:16px;margin-bottom:24px}
.admin-head h1{font-size:clamp(32px,3.6vw,46px);line-height:1.2}
.admin-head p{color:var(--text-2);font-size:15px}
.admin-card{padding:24px;background:var(--white);border:var(--line);border-radius:20px;box-shadow:var(--hard-sm);margin-bottom:22px}
.admin-card h2{font-size:24px;line-height:1.3;margin-bottom:14px}
.admin-card-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:12px}
.admin-card-head h2{margin:0}
.admin-login{max-width:460px}
.admin-login .field{margin-bottom:14px}
.admin-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-bottom:22px}
.admin-stat{padding:18px;background:var(--white);border:var(--line);border-radius:16px;box-shadow:var(--hard-sm)}
.admin-stat b{display:block;font-family:var(--display);font-size:40px;line-height:1;margin-bottom:6px}
.admin-stat span{font-size:13px;color:var(--text-2)}
.admin-table-wrap{overflow-x:auto}
.admin-table{width:100%;border-collapse:collapse;font-size:14px}
.admin-table th,.admin-table td{padding:10px 12px;border-bottom:2px solid var(--chalk);text-align:left;vertical-align:top}
.admin-table th{background:var(--chalk);font-size:13px;white-space:nowrap}
.admin-table td{word-break:break-word}
.admin-table tr:last-child td{border-bottom:0}
.admin-empty{padding:18px;color:var(--text-2);text-align:center}
.admin-mail-form{display:grid;gap:14px}
.admin-mail-form textarea{min-height:120px}
.admin-row{display:grid;grid-template-columns:1fr 1fr;gap:14px}

/* ---------- 协议页 ---------- */
.legal-main{padding:56px 0 90px;background:var(--chalk);min-height:calc(100vh - 65px)}
.legal-card{max-width:820px;margin:0 auto;padding:44px 48px;background:var(--white);border:var(--line);border-radius:24px;box-shadow:var(--hard)}
.legal-card h1{font-family:var(--display);font-weight:400;font-size:clamp(32px,3.6vw,46px);line-height:1.2;margin-bottom:8px}
.legal-updated{color:var(--text-2);font-size:14px;margin-bottom:26px}
.legal-card h2{font-family:var(--display);font-weight:400;font-size:24px;line-height:1.35;margin:28px 0 8px}
.legal-card p,.legal-card li{color:var(--text-2);line-height:1.8}
.legal-card ul{margin:8px 0 0 1.2em;list-style:disc}
.legal-card li{margin:4px 0}
.legal-card a{color:var(--blue);font-weight:700;text-decoration:underline;text-underline-offset:3px}
.legal-card code{font-family:var(--mono);font-size:.92em;background:var(--chalk);padding:2px 6px;border-radius:6px}
.legal-back{display:inline-block;margin-bottom:18px;font-weight:800;text-decoration:underline;text-underline-offset:4px}


/* ---------- 响应式（共享部分） ---------- */
@media (max-width:1060px){
  .nav{display:none}
  .auth-wrap,.admin-row{grid-template-columns:1fr}
}
@media (max-width:720px){
  body{font-size:16px}
  .wrap{width:calc(100% - 32px)}
  .topbar-in{height:60px;gap:12px}
  .brand{font-size:23px}
  .topbar-login{display:none}
  .field-row{grid-template-columns:1fr}
  .auth-main{padding:40px 0 70px}
  .auth-card{padding:26px 20px}
  .auth-intro h1{font-size:32px;text-shadow:3px 3px 0 var(--ink)}
  .admin-stats{grid-template-columns:1fr 1fr}
  .legal-card{padding:30px 20px}
  .foot-copy{margin-left:0}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important}
}