/* ============================================================
   CET-4 备考冲刺站 · 动态玻璃拟态样式
   ============================================================ */

:root{
  --bg-0:#070b1c;
  --bg-1:#0b1026;
  --ink:#eaf0ff;
  --ink-dim:#a9b4d0;
  --ink-mute:#7c88a8;
  --line:rgba(255,255,255,.14);
  --glass:rgba(255,255,255,.07);
  --glass-strong:rgba(255,255,255,.11);
  --glass-brd:rgba(255,255,255,.18);
  --shadow:0 18px 50px rgba(3,7,24,.45);
  --c1:#5b8cff;
  --c2:#8b5cf6;
  --c3:#22d3ee;
  --c4:#f472b6;
  --radius:20px;
  --maxw:1180px;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  min-height:100vh;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  color:var(--ink);
  background:var(--bg-0);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

/* ---------- 动态背景 ---------- */
.bg{position:fixed;inset:0;z-index:-1;overflow:hidden;background:
  radial-gradient(1200px 800px at 15% -10%, #16205a 0%, transparent 60%),
  radial-gradient(1000px 700px at 90% 0%, #2a1450 0%, transparent 55%),
  linear-gradient(180deg,var(--bg-0) 0%,var(--bg-1) 55%,#060915 100%);}
.blob{position:absolute;border-radius:50%;filter:blur(70px);opacity:.55;mix-blend-mode:screen;will-change:transform;}
.b1{width:520px;height:520px;background:radial-gradient(circle at 30% 30%,var(--c1),transparent 70%);top:-120px;left:-80px;animation:float1 22s ease-in-out infinite;}
.b2{width:460px;height:460px;background:radial-gradient(circle at 40% 40%,var(--c2),transparent 70%);top:20%;right:-120px;animation:float2 26s ease-in-out infinite;}
.b3{width:420px;height:420px;background:radial-gradient(circle at 50% 50%,var(--c3),transparent 70%);bottom:-140px;left:22%;animation:float3 30s ease-in-out infinite;}
.b4{width:360px;height:360px;background:radial-gradient(circle at 50% 50%,var(--c4),transparent 70%);bottom:12%;right:16%;animation:float1 34s ease-in-out infinite reverse;}
.noise{position:absolute;inset:0;opacity:.035;background-image:radial-gradient(rgba(255,255,255,.9) 1px,transparent 1px);background-size:3px 3px;}
@keyframes float1{0%,100%{transform:translate3d(0,0,0) scale(1)}50%{transform:translate3d(60px,50px,0) scale(1.12)}}
@keyframes float2{0%,100%{transform:translate3d(0,0,0) scale(1)}50%{transform:translate3d(-70px,40px,0) scale(1.08)}}
@keyframes float3{0%,100%{transform:translate3d(0,0,0) scale(1)}50%{transform:translate3d(40px,-60px,0) scale(1.15)}}

/* ---------- 玻璃基类 ---------- */
.glass{
  background:var(--glass);
  -webkit-backdrop-filter:blur(18px) saturate(150%);
  backdrop-filter:blur(18px) saturate(150%);
  border:1px solid var(--glass-brd);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
}
.glass-chip{
  display:inline-block;padding:6px 14px;border-radius:999px;
  background:var(--glass-strong);border:1px solid var(--glass-brd);
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
  color:var(--ink-dim);font-size:13px;letter-spacing:.06em;
}

/* ---------- 顶部导航 ---------- */
.topbar{
  position:sticky;top:0;z-index:50;
  display:flex;align-items:center;gap:18px;
  max-width:var(--maxw);margin:14px auto 0;
  padding:10px 18px;border-radius:999px;
}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);white-space:nowrap;}
.brand-mark{
  font-weight:800;font-size:16px;letter-spacing:.04em;
  padding:5px 11px;border-radius:12px;
  background:linear-gradient(135deg,var(--c1),var(--c2));
  box-shadow:0 8px 22px rgba(91,140,255,.35);
}
.brand-mark span{color:#cfe0ff;}
.brand-text{font-size:14px;color:var(--ink-dim);}
.nav{display:flex;gap:4px;margin-left:auto;flex-wrap:wrap;}
.nav a{
  color:var(--ink-dim);text-decoration:none;font-size:14px;
  padding:7px 13px;border-radius:999px;transition:.25s;
}
.nav a:hover{color:#fff;background:rgba(255,255,255,.1);}
.nav a.active{color:#fff;background:rgba(255,255,255,.14);box-shadow:inset 0 0 0 1px var(--glass-brd);}
.nav-toggle{display:none;background:none;border:0;padding:8px;cursor:pointer;}
.nav-toggle span{display:block;width:22px;height:2px;background:var(--ink);margin:5px 0;border-radius:2px;transition:.25s;}

/* ---------- 布局 ---------- */
main{max-width:var(--maxw);margin:0 auto;padding:0 20px;}
.section{padding:78px 0 8px;scroll-margin-top:96px;}
.section-head{margin-bottom:26px;}
.section-head h2{
  margin:0 0 8px;font-size:clamp(24px,3vw,34px);letter-spacing:.01em;
  background:linear-gradient(120deg,#fff,#bcd0ff 60%,#d9c8ff);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.section-head p{margin:0;color:var(--ink-mute);font-size:14px;}

.grid{display:grid;gap:16px;}
.grid-2{grid-template-columns:repeat(2,1fr);}
.grid-3{grid-template-columns:repeat(3,1fr);}
.grid-4{grid-template-columns:repeat(4,1fr);margin-bottom:18px;}

/* ---------- 首页 ---------- */
.hero{min-height:88vh;display:flex;align-items:center;padding:60px 0 30px;scroll-margin-top:96px;}
.hero-inner{width:100%;text-align:center;}
.eyebrow{margin:0 0 18px;}
.hero h1{margin:0 0 28px;font-size:clamp(22px,3.4vw,40px);font-weight:600;letter-spacing:.01em;}
.grad{background:linear-gradient(120deg,var(--c3),var(--c1),var(--c4));-webkit-background-clip:text;background-clip:text;color:transparent;}
.countdown{display:flex;justify-content:center;gap:16px;flex-wrap:wrap;margin-bottom:22px;}
.cd-cell{
  min-width:118px;padding:20px 10px;border-radius:22px;
  display:flex;flex-direction:column;align-items:center;gap:4px;
}
.cd-cell b{font-size:clamp(34px,5vw,54px);font-weight:800;font-variant-numeric:tabular-nums;
  background:linear-gradient(160deg,#fff,#a9c4ff);-webkit-background-clip:text;background-clip:text;color:transparent;line-height:1;}
.cd-cell span{font-size:13px;color:var(--ink-mute);letter-spacing:.14em;}
.hero-sub{color:var(--ink-dim);font-size:15px;margin:0 0 26px;}
.hero-actions{display:flex;justify-content:center;gap:14px;flex-wrap:wrap;margin-bottom:44px;}
.btn{
  display:inline-block;padding:12px 28px;border-radius:999px;text-decoration:none;
  font-size:15px;font-weight:600;transition:.25s;border:1px solid transparent;
}
.btn.primary{background:linear-gradient(135deg,var(--c1),var(--c2));color:#fff;box-shadow:0 12px 30px rgba(91,140,255,.4);}
.btn.primary:hover{transform:translateY(-2px);box-shadow:0 16px 38px rgba(91,140,255,.55);}
.btn.ghost{background:var(--glass);border-color:var(--glass-brd);color:var(--ink);
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);}
.btn.ghost:hover{background:var(--glass-strong);transform:translateY(-2px);}
.hero-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;max-width:760px;margin:0 auto;}
.stat{padding:18px 8px;border-radius:18px;display:flex;flex-direction:column;gap:2px;}
.stat b{font-size:26px;font-weight:800;color:#fff;}
.stat span{font-size:12px;color:var(--ink-mute);letter-spacing:.1em;}

/* ---------- 卡片 ---------- */
.card{padding:22px 22px 20px;transition:.3s;}
.card:hover{transform:translateY(-4px);background:var(--glass-strong);}
.card h3{margin:0 0 10px;font-size:17px;color:#fff;}
.card p{margin:0;color:var(--ink-dim);font-size:14px;}
.card b{color:#cfe0ff;}
.card-tag{font-size:13px;color:var(--c3);letter-spacing:.08em;margin-bottom:6px;}
.card-big{font-size:34px;font-weight:800;color:#fff;line-height:1.2;margin-bottom:8px;}

/* ---------- 表格 ---------- */
.table-wrap{padding:8px;overflow-x:auto;margin-bottom:20px;}
.tbl{width:100%;border-collapse:collapse;font-size:14px;min-width:640px;}
.tbl th,.tbl td{padding:12px 14px;text-align:left;border-bottom:1px solid rgba(255,255,255,.1);}
.tbl th{color:#cdd8f5;font-weight:600;font-size:13px;letter-spacing:.04em;}
.tbl td{color:var(--ink-dim);}
.tbl tbody tr:hover{background:rgba(255,255,255,.05);}
.tbl tr.muted td{color:var(--ink-mute);font-size:12.5px;}
.tbl tr.total td{color:#fff;font-weight:700;border-bottom:0;}

/* ---------- 工具条 ---------- */
.toolbar{display:flex;align-items:center;gap:14px;flex-wrap:wrap;padding:12px 16px;margin-bottom:20px;border-radius:16px;}
.toolbar input[type=search]{
  flex:1;min-width:220px;padding:11px 16px;border-radius:999px;
  border:1px solid var(--glass-brd);background:rgba(255,255,255,.06);
  color:var(--ink);font-size:14px;outline:none;transition:.25s;
}
.toolbar input[type=search]::placeholder{color:var(--ink-mute);}
.toolbar input[type=search]:focus{background:rgba(255,255,255,.12);box-shadow:0 0 0 3px rgba(91,140,255,.25);}
.chips{display:flex;gap:8px;flex-wrap:wrap;}
.chip{
  padding:8px 16px;border-radius:999px;border:1px solid var(--glass-brd);
  background:rgba(255,255,255,.05);color:var(--ink-dim);font-size:13px;cursor:pointer;transition:.25s;
}
.chip:hover{color:#fff;background:rgba(255,255,255,.12);}
.chip.active{color:#fff;background:linear-gradient(135deg,rgba(91,140,255,.5),rgba(139,92,246,.5));border-color:transparent;}
.count{font-size:13px;color:var(--ink-mute);margin-left:auto;}

/* ---------- 词汇 ---------- */
.vocab-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:14px;}
.vocab{position:relative;padding:16px 18px;border-radius:16px;cursor:pointer;transition:.3s;overflow:hidden;}
.vocab:hover{transform:translateY(-3px);background:var(--glass-strong);}
.vocab-top{display:flex;align-items:baseline;gap:10px;flex-wrap:wrap;padding-right:56px;}
.vocab-w{font-size:19px;font-weight:700;color:#fff;}
.vocab-p{font-size:12.5px;color:var(--c3);}
.vocab-t{font-size:12px;color:var(--c4);font-weight:600;}
.vocab-m{margin-top:6px;color:var(--ink-dim);font-size:14px;}
.vocab-e{
  margin-top:10px;padding-top:10px;border-top:1px dashed rgba(255,255,255,.14);
  color:var(--ink-mute);font-size:13px;font-style:italic;
  max-height:0;opacity:0;overflow:hidden;transition:.35s;
}
.vocab.open .vocab-e{max-height:200px;opacity:1;}
.badge{
  position:absolute;top:12px;right:12px;font-size:11px;letter-spacing:.05em;
  padding:3px 9px;border-radius:999px;background:rgba(255,255,255,.1);color:var(--ink-mute);
}
.empty{text-align:center;color:var(--ink-mute);padding:30px;font-size:14px;}

/* ---------- 短语 ---------- */
.phrase-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:12px;}
.phrase{padding:15px 18px;border-radius:15px;transition:.3s;}
.phrase:hover{background:var(--glass-strong);transform:translateY(-2px);}
.phrase-en{font-size:16px;font-weight:700;color:#fff;}
.phrase-cn{color:var(--ink-dim);font-size:13.5px;margin-top:3px;}
.phrase-ex{color:var(--ink-mute);font-size:12.5px;margin-top:7px;font-style:italic;}

/* ---------- 标签页 ---------- */
.tabs{display:flex;gap:6px;flex-wrap:wrap;padding:8px;margin-bottom:18px;border-radius:16px;}
.tab{
  padding:9px 18px;border-radius:999px;border:0;background:transparent;
  color:var(--ink-dim);font-size:14px;cursor:pointer;transition:.25s;
}
.tab:hover{color:#fff;background:rgba(255,255,255,.08);}
.tab.active{color:#fff;background:linear-gradient(135deg,rgba(91,140,255,.5),rgba(139,92,246,.5));}
.tab-panel{display:none;animation:fade .4s ease;}
.tab-panel.active{display:block;}
@keyframes fade{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none;}}
.panel-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:14px;}
.block{padding:20px;border-radius:16px;}
.block h4{margin:0 0 12px;font-size:15px;color:var(--c3);letter-spacing:.04em;}
.block ol,.block ul{margin:0;padding-left:20px;color:var(--ink-dim);font-size:14px;}
.block li{margin-bottom:9px;}
.block li b{color:#fff;}
.en{color:#d7e3ff;font-style:italic;}
.tag-row{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px;}
.tag{font-size:12px;padding:4px 11px;border-radius:999px;background:rgba(255,255,255,.08);color:var(--ink-dim);}

/* ---------- 手风琴（语法） ---------- */
.acc{display:grid;gap:12px;}
.acc-item{border-radius:16px;overflow:hidden;}
.acc-head{
  width:100%;text-align:left;padding:18px 20px;background:transparent;border:0;
  color:#fff;font-size:16px;font-weight:600;cursor:pointer;
  display:flex;align-items:center;justify-content:space-between;gap:12px;
}
.acc-head::after{content:"";width:9px;height:9px;border-right:2px solid var(--ink-dim);border-bottom:2px solid var(--ink-dim);
  transform:rotate(45deg);transition:.3s;flex:none;}
.acc-item.open .acc-head::after{transform:rotate(-135deg);}
.acc-body{max-height:0;overflow:hidden;transition:max-height .4s ease;}
.acc-item.open .acc-body{max-height:1200px;}
.acc-body-in{padding:0 20px 20px;color:var(--ink-dim);font-size:14px;}
.acc-body-in ul{margin:8px 0 0;padding-left:20px;}
.acc-body-in li{margin-bottom:8px;}
.acc-body-in .en{display:block;color:#cfe0ff;font-size:13.5px;margin-top:2px;}

/* ---------- 列表 ---------- */
.list{margin:0;padding-left:20px;color:var(--ink-dim);font-size:14px;}
.list li{margin-bottom:10px;}
.list li b{color:#fff;}

/* ---------- 时间线 ---------- */
.timeline{position:relative;padding-left:26px;margin-bottom:26px;}
.timeline::before{content:"";position:absolute;left:7px;top:6px;bottom:6px;width:2px;
  background:linear-gradient(180deg,var(--c1),var(--c2),transparent);border-radius:2px;}
.tl-item{position:relative;margin-bottom:14px;}
.tl-item::before{content:"";position:absolute;left:-24px;top:20px;width:12px;height:12px;border-radius:50%;
  background:linear-gradient(135deg,var(--c1),var(--c3));box-shadow:0 0 0 4px rgba(91,140,255,.18);}
.tl-card{padding:16px 20px;border-radius:16px;transition:.3s;}
.tl-card:hover{background:var(--glass-strong);}
.tl-card h4{margin:0 0 6px;font-size:15px;color:#fff;}
.tl-card p{margin:0;color:var(--ink-dim);font-size:13.5px;}
.tl-week{font-size:12px;color:var(--c3);letter-spacing:.06em;margin-bottom:4px;}
.note{margin-top:8px;}

/* ---------- 页脚 ---------- */
.footer{max-width:var(--maxw);margin:40px auto 30px;padding:22px 26px;text-align:center;border-radius:22px;}
.footer p{margin:4px 0;font-size:13px;color:var(--ink-dim);}
.muted{color:var(--ink-mute)!important;font-size:12.5px!important;}

/* ---------- 滚动条 ---------- */
::-webkit-scrollbar{width:10px;height:10px;}
::-webkit-scrollbar-thumb{background:rgba(255,255,255,.16);border-radius:8px;}
::-webkit-scrollbar-track{background:transparent;}

/* ---------- 响应式 ---------- */
@media (max-width:900px){
  .grid-3,.grid-4{grid-template-columns:repeat(2,1fr);}
  .hero-stats{grid-template-columns:repeat(2,1fr);}
  .nav{
    position:absolute;top:70px;right:14px;left:14px;flex-direction:column;
    background:rgba(12,17,38,.92);-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);
    border:1px solid var(--glass-brd);border-radius:18px;padding:12px;gap:4px;
    display:none;
  }
  .nav.open{display:flex;}
  .nav a{padding:11px 14px;}
  .nav-toggle{display:block;margin-left:auto;}
}
@media (max-width:600px){
  .grid-2,.grid-3,.grid-4{grid-template-columns:1fr;}
  .cd-cell{min-width:78px;padding:15px 6px;}
  .count{width:100%;margin-left:0;text-align:right;}
  .section{padding:58px 0 6px;}
}
@media (prefers-reduced-motion:reduce){
  .blob{animation:none;}
  html{scroll-behavior:auto;}
}

/* ============================================================
   登录系统 / 背诵 / 后台 组件样式
   ============================================================ */

/* ---------- 顶栏用户区 ---------- */
.userbox{display:flex;align-items:center;gap:10px;margin-left:12px;white-space:nowrap;}
.user-name{font-size:13px;color:var(--ink-dim);}
.logout{font-size:13px;color:var(--ink-dim);text-decoration:none;padding:6px 13px;border-radius:999px;border:1px solid var(--glass-brd);transition:.25s;}
.logout:hover{color:#fff;background:rgba(255,255,255,.12);}

/* ---------- 提示消息 ---------- */
.flash{padding:12px 18px;margin:14px 0;border-radius:14px;font-size:14px;color:var(--ink-dim);}
.flash.ok{color:#b9f6d0;border-color:rgba(52,211,153,.4);}
.flash.error{color:#ffc9c9;border-color:rgba(248,113,113,.4);}

/* ---------- 登录 / 注册 ---------- */
.auth-wrap{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:30px 18px;}
.auth-card{width:100%;max-width:420px;padding:34px 30px;border-radius:24px;}
.auth-head{text-align:center;margin-bottom:22px;}
.auth-head h1{margin:14px 0 6px;font-size:22px;color:#fff;}
.auth-head p{margin:0;font-size:13px;color:var(--ink-mute);}
.auth-form{display:flex;flex-direction:column;gap:14px;}
.auth-form label{display:flex;flex-direction:column;gap:6px;}
.auth-form label span{font-size:13px;color:var(--ink-dim);}
.auth-form input{padding:12px 16px;border-radius:12px;border:1px solid var(--glass-brd);background:rgba(255,255,255,.06);color:var(--ink);font-size:14px;outline:none;transition:.25s;font-family:inherit;}
.auth-form input:focus{background:rgba(255,255,255,.12);box-shadow:0 0 0 3px rgba(91,140,255,.25);}
.block-btn{width:100%;text-align:center;margin-top:6px;border:0;cursor:pointer;font-family:inherit;}
.auth-foot{text-align:center;margin:18px 0 0;font-size:13px;color:var(--ink-mute);}
.auth-foot a{color:var(--c3);text-decoration:none;}
.auth-foot a:hover{text-decoration:underline;}

/* ---------- 背诵模块 ---------- */
.review-bar{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;padding:16px 18px;margin-bottom:18px;border-radius:18px;}
.rb-item{display:flex;flex-direction:column;gap:2px;text-align:center;}
.rb-item span{font-size:12px;color:var(--ink-mute);}
.rb-item b{font-size:20px;color:#fff;}
.progress{height:10px;border-radius:999px;overflow:hidden;background:rgba(255,255,255,.08);}
.progress-in{height:100%;width:0;border-radius:999px;background:linear-gradient(90deg,var(--c1),var(--c3));transition:width .35s;}
.progress-text{text-align:right;font-size:12.5px;color:var(--ink-mute);margin:8px 0 18px;}
.review-stage{max-width:640px;margin:0 auto;}
.flashcard{position:relative;padding:40px 30px;border-radius:24px;text-align:center;min-height:260px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;}
.fc-kind{position:absolute;top:16px;left:18px;font-size:12px;color:var(--c3);letter-spacing:.08em;}
.fc-word{font-size:clamp(30px,5vw,46px);font-weight:800;color:#fff;}
.fc-phonetic{color:var(--c3);font-size:15px;}
.fc-pos{color:var(--c4);font-size:13px;font-weight:600;}
.fc-meaning{margin-top:10px;font-size:19px;color:#dfe8ff;}
.fc-example{margin-top:6px;font-size:14px;color:var(--ink-mute);font-style:italic;}
.reveal-btn{margin-top:16px;cursor:pointer;font-family:inherit;}
.grade-bar{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:18px;}
.grade-btn{padding:14px 10px;border-radius:14px;border:1px solid var(--glass-brd);background:var(--glass);color:#fff;font-size:15px;font-weight:600;cursor:pointer;transition:.25s;-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);font-family:inherit;}
.grade-btn:hover{transform:translateY(-2px);}
.grade-btn.unknown:hover{background:rgba(248,113,113,.28);}
.grade-btn.vague:hover{background:rgba(251,191,36,.24);}
.grade-btn.know:hover{background:rgba(52,211,153,.26);}
.review-done{padding:30px;border-radius:22px;text-align:center;max-width:640px;margin:0 auto;}
.review-done h3{margin:0 0 18px;color:#fff;font-size:20px;}
.done-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;}
.empty-card{padding:30px;border-radius:20px;}

/* ---------- 词库状态与收藏 ---------- */
.vocab-foot{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-top:12px;padding-top:10px;border-top:1px dashed rgba(255,255,255,.12);}
.status-dot{font-size:12px;color:var(--ink-mute);}
.status-dot.s-learning{color:var(--c3);}
.status-dot.s-mastered{color:#7ee2b0;}
.status-dot.s-pending{color:#fbbf24;}
.status-dot.s-active{color:#7ee2b0;}
.status-dot.s-disabled{color:#f87171;}
.fav-btn{font-size:12px;padding:4px 12px;border-radius:999px;border:1px solid var(--glass-brd);background:rgba(255,255,255,.05);color:var(--ink-dim);cursor:pointer;transition:.25s;font-family:inherit;}
.fav-btn:hover{color:#fff;background:rgba(255,255,255,.12);}
.fav-btn.on{color:#0b1026;background:linear-gradient(135deg,#fcd34d,#fbbf24);border-color:transparent;font-weight:600;}

/* ---------- 学习数据 ---------- */
.mini{display:flex;flex-direction:column;align-items:center;gap:2px;padding:12px;border-radius:14px;background:rgba(255,255,255,.05);}
.mini b{font-size:22px;color:#fff;}
.mini span{font-size:12px;color:var(--ink-mute);}
.chart{display:flex;align-items:flex-end;gap:8px;height:180px;padding-top:10px;}
.chart-col{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:flex-end;height:100%;gap:6px;}
.chart-bar{width:100%;border-radius:6px 6px 0 0;background:linear-gradient(180deg,var(--c1),var(--c2));min-height:3px;transition:.3s;}
.chart-label{font-size:10.5px;color:var(--ink-mute);white-space:nowrap;transform:rotate(-30deg);}
.fav-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:10px;}
.fav-item{display:flex;flex-wrap:wrap;align-items:baseline;gap:8px;padding:10px 14px;border-radius:12px;background:rgba(255,255,255,.05);font-size:14px;}
.fav-item b{color:#fff;}
.fav-cn{color:var(--ink-dim);font-size:13px;}
.section > .card{margin-bottom:16px;}

/* ---------- 后台管理 ---------- */
.admin-form{display:flex;flex-wrap:wrap;gap:10px;align-items:center;}
.admin-form input,.admin-form select{padding:10px 14px;border-radius:12px;border:1px solid var(--glass-brd);background:rgba(255,255,255,.06);color:var(--ink);font-size:13.5px;outline:none;font-family:inherit;}
.admin-form input:focus,.admin-form select:focus{background:rgba(255,255,255,.12);}
.admin-form select option{background:#0b1026;color:#fff;}
.inline-check{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--ink-dim);}
.op-cell{display:flex;flex-wrap:wrap;gap:6px;align-items:center;}
.inline{display:inline-flex;gap:6px;align-items:center;margin:0;}
.op{padding:5px 12px;border-radius:999px;border:1px solid var(--glass-brd);background:rgba(255,255,255,.06);color:var(--ink-dim);font-size:12.5px;cursor:pointer;transition:.25s;font-family:inherit;}
.op:hover{color:#fff;background:rgba(255,255,255,.14);}
.op.ok{color:#7ee2b0;}
.op.danger{color:#f87171;}
.pwd-in{width:90px;padding:5px 10px;border-radius:999px;border:1px solid var(--glass-brd);background:rgba(255,255,255,.06);color:var(--ink);font-size:12.5px;outline:none;font-family:inherit;}

@media (max-width:900px){
  .userbox{margin-left:auto;}
}
@media (max-width:600px){
  .user-name{display:none;}
  .review-bar{grid-template-columns:repeat(2,1fr);}
  .chart{height:140px;}
  .op-cell{max-width:180px;}
}

/* ============================================================
   v2 升级：后台子导航 / 分页 / 表单控件 / 极验
   ============================================================ */

/* ---------- 后台子导航 ---------- */
.admin-nav{display:flex;gap:6px;flex-wrap:wrap;padding:8px;margin-bottom:18px;border-radius:16px;}
.admin-nav a{color:var(--ink-dim);text-decoration:none;font-size:14px;padding:9px 18px;border-radius:999px;transition:.25s;}
.admin-nav a:hover{color:#fff;background:rgba(255,255,255,.1);}
.admin-nav a.active{color:#fff;background:linear-gradient(135deg,rgba(91,140,255,.5),rgba(139,92,246,.5));}

/* ---------- 分页 ---------- */
.pager{display:flex;gap:6px;flex-wrap:wrap;padding:10px 14px;margin-top:16px;border-radius:14px;justify-content:center;}
.pager a{min-width:36px;text-align:center;padding:7px 10px;border-radius:10px;color:var(--ink-dim);text-decoration:none;font-size:13px;transition:.25s;}
.pager a:hover{color:#fff;background:rgba(255,255,255,.12);}
.pager a.active{color:#fff;background:linear-gradient(135deg,var(--c1),var(--c2));}

/* ---------- 表单控件 ---------- */
.sel{padding:11px 16px;border-radius:999px;border:1px solid var(--glass-brd);background:rgba(255,255,255,.06);color:var(--ink);font-size:14px;outline:none;font-family:inherit;}
.sel option{background:#0b1026;color:#fff;}
.field{display:flex;flex-direction:column;gap:6px;font-size:13px;color:var(--ink-dim);}
.field input{padding:10px 14px;border-radius:12px;border:1px solid var(--glass-brd);background:rgba(255,255,255,.06);color:var(--ink);font-size:13.5px;outline:none;font-family:inherit;}
.field.wide{flex:1;min-width:220px;}
.field.wide input{width:100%;}
.ua-cell{max-width:280px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}

/* ---------- 极验 4.0 ---------- */
.geetest-box{min-height:44px;display:flex;align-items:center;}

/* ---------- 移动端细化适配 ---------- */
@media (max-width:900px){
  .topbar{flex-wrap:nowrap;}
  .admin-nav{overflow-x:auto;-webkit-overflow-scrolling:touch;}
}
@media (max-width:600px){
  .brand-text{display:none;}
  .topbar{padding:8px 12px;gap:10px;}
  .admin-nav{flex-wrap:nowrap;overflow-x:auto;}
  .admin-nav a{white-space:nowrap;padding:8px 14px;font-size:13px;}
  .review-done{padding:22px 16px;}
  .chart-label{font-size:9px;}
  .table-wrap{padding:4px;}
  .tbl th,.tbl td{padding:10px 10px;font-size:13px;}
  .hero-actions{flex-direction:column;align-items:stretch;}
  .hero-actions .btn{text-align:center;}
  .admin-form{flex-direction:column;align-items:stretch;}
  .admin-form input,.admin-form select,.admin-form .btn{width:100%;}
}

/* ============================================================
   登录 / 注册 · 美化版
   ============================================================ */
.auth-page{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:30px 18px;}
.auth-shell{
  position:relative;width:100%;max-width:960px;display:grid;grid-template-columns:1.06fr 1fr;
  border-radius:28px;overflow:hidden;
}
.auth-shell::after{
  content:"";position:absolute;inset:0;border-radius:28px;padding:1px;pointer-events:none;
  background:linear-gradient(135deg,rgba(91,140,255,.75),rgba(139,92,246,.45) 45%,rgba(34,211,238,.65));
  -webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);
  -webkit-mask-composite:xor;mask-composite:exclude;
}
.auth-visual{
  position:relative;padding:46px 40px;display:flex;flex-direction:column;gap:22px;overflow:hidden;
  background:linear-gradient(155deg,rgba(91,140,255,.24),rgba(139,92,246,.16) 48%,rgba(34,211,238,.12));
  border-right:1px solid rgba(255,255,255,.1);
}
.auth-visual .orb{position:absolute;border-radius:50%;filter:blur(46px);opacity:.55;pointer-events:none;}
.auth-visual .o1{width:230px;height:230px;background:radial-gradient(circle,rgba(91,140,255,.9),transparent 70%);top:-70px;left:-60px;animation:float1 20s ease-in-out infinite;}
.auth-visual .o2{width:210px;height:210px;background:radial-gradient(circle,rgba(34,211,238,.8),transparent 70%);bottom:-80px;right:-50px;animation:float2 26s ease-in-out infinite;}
.v-brand{position:relative;display:flex;align-items:center;gap:12px;}
.v-title{position:relative;margin:0;font-size:clamp(21px,2.3vw,29px);line-height:1.45;font-weight:700;color:#fff;}
.v-title span{background:linear-gradient(120deg,var(--c3),var(--c1),var(--c4));-webkit-background-clip:text;background-clip:text;color:transparent;}
.v-sub{position:relative;margin:0;color:var(--ink-dim);font-size:14px;}
.v-count{
  position:relative;display:inline-flex;align-items:baseline;gap:9px;padding:13px 20px;border-radius:18px;width:fit-content;
  background:rgba(255,255,255,.09);border:1px solid var(--glass-brd);
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
}
.v-count b{font-size:32px;font-weight:800;color:#fff;font-variant-numeric:tabular-nums;line-height:1;}
.v-count span{font-size:13px;color:var(--ink-mute);}
.v-features{position:relative;display:flex;flex-direction:column;gap:13px;margin-top:auto;}
.v-feature{display:flex;align-items:center;gap:12px;font-size:14px;color:var(--ink-dim);}
.v-feature i{
  flex:none;width:27px;height:27px;border-radius:9px;font-style:normal;font-weight:700;font-size:11.5px;
  display:inline-flex;align-items:center;justify-content:center;color:#fff;
  background:linear-gradient(135deg,rgba(91,140,255,.5),rgba(139,92,246,.42));
}
.auth-panel{padding:46px 40px;display:flex;flex-direction:column;justify-content:center;gap:20px;}
.panel-head h1{margin:0 0 7px;font-size:24px;color:#fff;}
.panel-head p{margin:0;font-size:13.5px;color:var(--ink-mute);}
.field-row{display:flex;flex-direction:column;gap:7px;}
.field-row>span{font-size:13px;color:var(--ink-dim);}
.input-wrap{position:relative;display:flex;align-items:center;}
.input-wrap svg{
  position:absolute;left:14px;width:17px;height:17px;fill:none;stroke:var(--ink-mute);
  stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;pointer-events:none;transition:.25s;
}
.input-wrap:focus-within svg{stroke:var(--c3);}
.input-wrap input{
  width:100%;padding:13px 16px 13px 42px;border-radius:14px;border:1px solid var(--glass-brd);
  background:rgba(255,255,255,.06);color:var(--ink);font-size:14px;outline:none;transition:.25s;font-family:inherit;
}
.input-wrap input:focus{background:rgba(255,255,255,.13);border-color:rgba(91,140,255,.55);box-shadow:0 0 0 4px rgba(91,140,255,.16);}
.input-wrap input::placeholder{color:var(--ink-mute);}
.pwd-toggle{
  position:absolute;right:11px;padding:5px 9px;border:0;border-radius:9px;background:none;
  color:var(--ink-mute);font-size:12px;cursor:pointer;font-family:inherit;transition:.25s;
}
.pwd-toggle:hover{color:#fff;background:rgba(255,255,255,.1);}
.btn-glow{position:relative;overflow:hidden;}
.btn-glow::after{
  content:"";position:absolute;top:0;left:-120%;width:60%;height:100%;transform:skewX(-18deg);
  background:linear-gradient(100deg,transparent,rgba(255,255,255,.45),transparent);transition:left .6s;
}
.btn-glow:hover::after{left:130%;}
.auth-foot{text-align:center;margin:0;font-size:13px;color:var(--ink-mute);}
.auth-foot a{color:var(--c3);text-decoration:none;}
.auth-foot a:hover{text-decoration:underline;}
.auth-divider{display:flex;align-items:center;gap:12px;color:var(--ink-mute);font-size:12px;}
.auth-divider::before,.auth-divider::after{content:"";flex:1;height:1px;background:rgba(255,255,255,.12);}

@media (max-width:820px){
  .auth-shell{grid-template-columns:1fr;max-width:470px;}
  .auth-visual{padding:30px 26px;gap:16px;border-right:0;border-bottom:1px solid rgba(255,255,255,.1);}
  .v-features{display:none;}
  .v-title{font-size:20px;}
  .v-count b{font-size:26px;}
  .v-count{padding:11px 16px;}
  .auth-panel{padding:30px 26px;}
  .v-brand .brand-text{display:inline;}
}
@media (max-width:480px){
  .auth-page{padding:16px 12px;}
  .auth-visual{padding:24px 20px;}
  .auth-panel{padding:26px 20px;}
  .panel-head h1{font-size:21px;}
  .v-brand .brand-text{display:none;}
}

/* ============================================================
   在线题库
   ============================================================ */
.quiz-stage{max-width:680px;margin:0 auto;}
.quiz-card{padding:34px 30px;border-radius:24px;display:flex;flex-direction:column;gap:14px;}
.q-label{font-size:13px;color:var(--c3);letter-spacing:.06em;}
.q-prompt{font-size:clamp(20px,3vw,28px);font-weight:700;color:#fff;line-height:1.5;word-break:break-word;}
.q-sub{font-size:14px;color:var(--ink-mute);}
.q-options{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin-top:6px;}
.q-option{
  display:flex;align-items:center;gap:12px;padding:15px 18px;border-radius:16px;text-align:left;
  border:1px solid var(--glass-brd);background:rgba(255,255,255,.05);color:var(--ink);
  font-size:15px;cursor:pointer;transition:.22s;font-family:inherit;
}
.q-option:hover:not(:disabled){background:rgba(255,255,255,.13);transform:translateY(-2px);}
.q-option:disabled{cursor:default;}
.q-idx{
  flex:none;width:26px;height:26px;border-radius:9px;display:inline-flex;align-items:center;justify-content:center;
  font-size:12.5px;font-weight:700;background:rgba(255,255,255,.1);color:var(--ink-dim);
}
.q-text{flex:1;}
.q-option.correct{border-color:rgba(52,211,153,.7);background:rgba(52,211,153,.18);}
.q-option.correct .q-idx{background:rgba(52,211,153,.5);color:#fff;}
.q-option.wrong{border-color:rgba(248,113,113,.7);background:rgba(248,113,113,.16);}
.q-option.wrong .q-idx{background:rgba(248,113,113,.5);color:#fff;}
.q-feedback{padding:12px 16px;border-radius:14px;font-size:14px;line-height:1.6;}
.q-feedback.ok{background:rgba(52,211,153,.14);color:#a7f3d0;border:1px solid rgba(52,211,153,.35);}
.q-feedback.bad{background:rgba(248,113,113,.14);color:#fecaca;border:1px solid rgba(248,113,113,.35);}
.q-next{align-self:flex-start;cursor:pointer;border:0;}
@media (max-width:600px){
  .q-options{grid-template-columns:1fr;}
  .quiz-card{padding:24px 20px;}
  .q-next{align-self:stretch;text-align:center;}
}

/* ============================================================
   后台管理 · 仪表盘改版
   ============================================================ */
.admin-hero{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  padding:22px 26px;border-radius:20px;margin-bottom:18px;
  background:linear-gradient(135deg,rgba(91,140,255,.18),rgba(139,92,246,.12) 60%,rgba(34,211,238,.1));
}
.admin-hero h2{margin:0;font-size:22px;color:#fff;letter-spacing:.01em;}
.admin-hero p{margin:5px 0 0;font-size:13px;color:var(--ink-mute);}
.hero-badge{
  font-size:12.5px;color:var(--c3);padding:7px 16px;border-radius:999px;
  background:rgba(255,255,255,.08);border:1px solid var(--glass-brd);white-space:nowrap;
}

.stat-row{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-bottom:18px;}
.stat-card{padding:18px 20px;border-radius:18px;display:flex;flex-direction:column;gap:3px;position:relative;overflow:hidden;}
.stat-card span{font-size:12.5px;color:var(--ink-mute);letter-spacing:.04em;}
.stat-card b{font-size:30px;font-weight:800;color:#fff;line-height:1.15;}
.stat-card small{font-size:12px;color:var(--ink-dim);}
.stat-card::after{content:"";position:absolute;right:-34px;top:-34px;width:96px;height:96px;border-radius:50%;
  background:radial-gradient(circle,rgba(91,140,255,.42),transparent 70%);}
.stat-card.warn::after{background:radial-gradient(circle,rgba(251,191,36,.38),transparent 70%);}
.stat-card.ok::after{background:radial-gradient(circle,rgba(52,211,153,.38),transparent 70%);}
.stat-card.bad::after{background:radial-gradient(circle,rgba(248,113,113,.38),transparent 70%);}

.card-title{display:flex;align-items:center;justify-content:space-between;gap:12px;margin:0 0 14px;}
.card-title h3{margin:0;}
.card-title .hint{font-size:12.5px;color:var(--ink-mute);}

.form-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;}
.form-grid .field{display:flex;flex-direction:column;gap:6px;}
.form-grid .field span{font-size:12.5px;color:var(--ink-dim);}
.form-grid .field input,.form-grid .field select{
  padding:11px 14px;border-radius:12px;border:1px solid var(--glass-brd);
  background:rgba(255,255,255,.06);color:var(--ink);font-size:13.5px;outline:none;font-family:inherit;
}
.form-grid .field input:focus,.form-grid .field select:focus{background:rgba(255,255,255,.13);border-color:rgba(91,140,255,.5);}
.form-grid .field select option{background:#0b1026;color:#fff;}
.form-actions{grid-column:1/-1;display:flex;gap:10px;align-items:center;}

.user-cell{display:flex;align-items:center;gap:10px;}
.avatar{
  flex:none;width:32px;height:32px;border-radius:10px;display:inline-flex;align-items:center;justify-content:center;
  font-size:13px;font-weight:700;color:#fff;background:linear-gradient(135deg,var(--c1),var(--c2));
}
.pill{display:inline-block;font-size:12px;padding:3px 11px;border-radius:999px;border:1px solid transparent;white-space:nowrap;}
.pill.p-active{color:#7ee2b0;background:rgba(52,211,153,.14);border-color:rgba(52,211,153,.35);}
.pill.p-pending{color:#fbbf24;background:rgba(251,191,36,.14);border-color:rgba(251,191,36,.35);}
.pill.p-disabled{color:#f87171;background:rgba(248,113,113,.14);border-color:rgba(248,113,113,.35);}
.pill.p-admin{color:#a9c4ff;background:rgba(91,140,255,.16);border-color:rgba(91,140,255,.38);}
.pill.p-user{color:var(--ink-dim);background:rgba(255,255,255,.07);border-color:var(--glass-brd);}

.tbl thead th{position:sticky;top:0;background:rgba(12,17,38,.9);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);z-index:2;}
.tbl tbody tr:nth-child(even){background:rgba(255,255,255,.025);}
.tbl td{vertical-align:middle;}

.bar-mini{height:7px;border-radius:999px;background:rgba(255,255,255,.1);overflow:hidden;min-width:84px;margin-top:5px;}
.bar-mini i{display:block;height:100%;border-radius:999px;background:linear-gradient(90deg,var(--c1),var(--c3));}

@media (max-width:900px){
  .stat-row{grid-template-columns:repeat(2,1fr);}
  .form-grid{grid-template-columns:1fr 1fr;}
  .admin-hero{padding:18px 20px;}
}
@media (max-width:600px){
  .stat-row{grid-template-columns:1fr 1fr;gap:10px;}
  .stat-card{padding:14px 16px;}
  .stat-card b{font-size:23px;}
  .form-grid{grid-template-columns:1fr;}
  .admin-hero h2{font-size:19px;}
}