/* ============================================================
   安培学堂 · 设计系统
   ============================================================ */
:root{
  --bg:#070C15;
  --bg-soft:#0A1220;
  --card:#0F1A2A;
  --card-2:#132134;
  --card-hi:#172941;
  --line:rgba(150,182,224,.13);
  --line-strong:rgba(150,182,224,.28);
  --text:#E9F1FB;
  --text-2:#B7C8DE;
  --muted:#7E93AF;
  --accent:#2DE1B4;
  --accent-deep:#12A98B;
  --amber:#FFB454;
  --indigo:#8393FF;
  --danger:#FF6B6B;
  --ok:#3DDC97;
  --radius:18px;
  --radius-sm:12px;
  --shadow:0 18px 46px rgba(0,0,0,.38);
  --font:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;background:var(--bg);color:var(--text);
  font-family:var(--font);font-size:14px;line-height:1.65;
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";position:fixed;inset:0;pointer-events:none;z-index:0;
  background:
    radial-gradient(820px 520px at 12% -8%, rgba(45,225,180,.13), transparent 62%),
    radial-gradient(900px 600px at 96% 4%, rgba(131,147,255,.12), transparent 60%),
    radial-gradient(680px 500px at 60% 108%, rgba(255,180,84,.07), transparent 60%);
}
a{color:inherit;text-decoration:none}
button{font-family:inherit}
::selection{background:rgba(45,225,180,.28)}
::-webkit-scrollbar{width:9px;height:9px}
::-webkit-scrollbar-thumb{background:#22324a;border-radius:9px}
::-webkit-scrollbar-track{background:transparent}
input,textarea,select{font-family:inherit;font-size:14px}

.app-root{position:relative;z-index:1;min-height:100%}
.view-fade{animation:fadeUp .42s cubic-bezier(.22,.68,.35,1) both}
@keyframes fadeUp{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}
@keyframes floaty{0%,100%{transform:translateY(0)}50%{transform:translateY(-8px)}}
@keyframes glowPulse{0%,100%{opacity:.55}50%{opacity:1}}

/* ---------------- 通用 ---------------- */
.page{max-width:1220px;margin:0 auto;padding:26px 24px 70px}
.page-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:22px;flex-wrap:wrap}
.page-title{margin:0;font-size:24px;letter-spacing:.4px;font-weight:700}
.page-sub{margin:6px 0 0;color:var(--muted);font-size:13px}
.eyebrow{font-size:11px;letter-spacing:2.4px;text-transform:uppercase;color:var(--accent);font-weight:700}

.card{
  background:linear-gradient(160deg,var(--card) 0%,#0C1626 100%);
  border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);position:relative;
}
.card.pad{padding:22px}
.grid{display:grid;gap:16px}
.row{display:flex;align-items:center;gap:10px}
.between{display:flex;align-items:center;justify-content:space-between;gap:12px}
.muted{color:var(--muted)}
.small{font-size:12px}
.tiny{font-size:11px}
.strong{font-weight:700}
.spacer{flex:1}
.hr{height:1px;background:var(--line);margin:16px 0}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:10px 18px;border-radius:12px;border:1px solid var(--line-strong);
  background:transparent;color:var(--text);font-size:13px;font-weight:600;
  cursor:pointer;transition:.2s ease;white-space:nowrap;
}
.btn:hover{background:rgba(255,255,255,.05);border-color:var(--accent)}
.btn:active{transform:scale(.98)}
.btn-primary{
  background:linear-gradient(135deg,#2DE1B4,#1AA6D8);border:none;color:#04121A;
  box-shadow:0 10px 26px rgba(45,225,180,.22);
}
.btn-primary:hover{filter:brightness(1.06);background:linear-gradient(135deg,#2DE1B4,#1AA6D8)}
.btn-amber{background:linear-gradient(135deg,#FFB454,#FF8A48);border:none;color:#1E1103;box-shadow:0 10px 26px rgba(255,180,84,.2)}
.btn-amber:hover{background:linear-gradient(135deg,#FFB454,#FF8A48)}
.btn-ghost{background:rgba(255,255,255,.03)}
.btn-sm{padding:7px 13px;font-size:12px;border-radius:10px}
.btn-block{width:100%}
.btn:disabled{opacity:.45;cursor:not-allowed}
.icon-btn{width:34px;height:34px;padding:0;border-radius:10px;display:inline-flex;align-items:center;justify-content:center;background:rgba(255,255,255,.05);border:1px solid var(--line);color:var(--text-2);cursor:pointer;transition:.2s}
.icon-btn:hover{color:var(--accent);border-color:var(--accent)}

.tag{display:inline-flex;align-items:center;gap:5px;padding:3px 9px;border-radius:999px;font-size:11px;background:rgba(45,225,180,.1);color:#7FF0D3;border:1px solid rgba(45,225,180,.18)}
.tag.amber{background:rgba(255,180,84,.1);color:#FFC987;border-color:rgba(255,180,84,.2)}
.tag.indigo{background:rgba(131,147,255,.12);color:#B4BEFF;border-color:rgba(131,147,255,.22)}
.tag.line{background:transparent;color:var(--muted);border-color:var(--line)}

/* 进度条 */
.bar{height:6px;border-radius:99px;background:rgba(255,255,255,.07);overflow:hidden}
.bar > i{display:block;height:100%;border-radius:99px;background:linear-gradient(90deg,#2DE1B4,#1AA6D8);transition:width .5s cubic-bezier(.2,.7,.3,1)}
.bar.amber > i{background:linear-gradient(90deg,#FFB454,#FF8A48)}

/* 进度环 */
.ring{
  --p:0;--c1:#2DE1B4;--c2:#1AA6D8;
  width:132px;height:132px;border-radius:50%;position:relative;flex:none;
  background:conic-gradient(from 210deg,var(--c1) 0deg,var(--c2) calc(var(--p)*3.6deg),rgba(255,255,255,.07) calc(var(--p)*3.6deg));
  display:grid;place-items:center;
}
.ring::after{content:"";position:absolute;inset:9px;border-radius:50%;background:#0B1523;border:1px solid rgba(255,255,255,.05)}
.ring .ring-in{position:relative;z-index:2;text-align:center;line-height:1.2}
.ring b{font-size:25px;letter-spacing:.5px}
.ring span{display:block;font-size:10.5px;color:var(--muted);margin-top:3px}
.ring.sm{width:74px;height:74px}
.ring.sm::after{inset:6px}
.ring.sm b{font-size:16px}

/* ---------------- 登录 / 注册 ---------------- */
.auth-page{min-height:100vh;display:grid;grid-template-columns:1.15fr .85fr}
.auth-brand{
  position:relative;overflow:hidden;padding:52px 56px;display:flex;flex-direction:column;justify-content:space-between;
  background:
    radial-gradient(700px 460px at 20% 12%, rgba(45,225,180,.22), transparent 60%),
    radial-gradient(560px 500px at 82% 78%, rgba(131,147,255,.2), transparent 62%),
    linear-gradient(160deg,#08111E,#060B12 70%);
  border-right:1px solid var(--line);
}
.auth-brand::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(160,200,255,.055) 1px,transparent 1px),linear-gradient(90deg,rgba(160,200,255,.055) 1px,transparent 1px);
  background-size:46px 46px;mask-image:radial-gradient(circle at 30% 30%,#000 20%,transparent 78%);
  pointer-events:none;
}
.auth-brand .logo{display:flex;align-items:center;gap:12px;position:relative;z-index:2}
.auth-brand h1{font-size:clamp(30px,3.2vw,46px);line-height:1.18;letter-spacing:1px;margin:0 0 14px;font-weight:800}
.auth-brand h1 em{font-style:normal;background:linear-gradient(100deg,#2DE1B4,#7FE0FF 55%,#A9B4FF);-webkit-background-clip:text;background-clip:text;color:transparent}
.auth-brand p.lead{color:var(--text-2);max-width:440px;font-size:14px;position:relative;z-index:2}
.auth-quote{color:var(--muted);font-size:12.5px;position:relative;z-index:2;border-left:2px solid rgba(45,225,180,.4);padding-left:12px}
.auth-certs{display:flex;flex-wrap:wrap;gap:9px;margin:26px 0 0;position:relative;z-index:2}
.auth-cert{display:flex;align-items:center;gap:8px;padding:8px 13px;border-radius:11px;font-size:12px;
  background:rgba(255,255,255,.045);border:1px solid rgba(255,255,255,.09);backdrop-filter:blur(8px);animation:floaty 6s ease-in-out infinite}
.auth-cert i{width:7px;height:7px;border-radius:50%;display:block}
.auth-side{display:flex;align-items:center;justify-content:center;padding:40px 32px;background:rgba(6,10,17,.6)}
.auth-card{width:100%;max-width:376px;position:relative}
.auth-card h2{margin:0 0 6px;font-size:21px}
.auth-tabs{display:flex;gap:6px;background:rgba(255,255,255,.04);border:1px solid var(--line);padding:4px;border-radius:13px;margin:22px 0 20px}
.auth-tabs button{flex:1;padding:9px 0;border-radius:10px;border:none;background:transparent;color:var(--muted);font-size:13px;font-weight:600;cursor:pointer;transition:.2s}
.auth-tabs button.on{background:linear-gradient(135deg,rgba(45,225,180,.2),rgba(26,166,216,.16));color:#8BF4DA;box-shadow:inset 0 0 0 1px rgba(45,225,180,.3)}
.field{margin-bottom:13px}
.field label{display:block;font-size:12px;color:var(--text-2);margin-bottom:6px}
.field input,.field textarea,.field select{
  width:100%;padding:11px 13px;border-radius:11px;background:rgba(255,255,255,.04);
  border:1px solid var(--line);color:var(--text);outline:none;transition:.2s;
}
.field input:focus,.field textarea:focus,.field select:focus{border-color:rgba(45,225,180,.55);background:rgba(45,225,180,.05);box-shadow:0 0 0 3px rgba(45,225,180,.09)}
.field input::placeholder,.field textarea::placeholder{color:#5B6E88}
.field select option{background:#0E1A2A}
.auth-hint{font-size:12px;color:var(--muted);margin-top:14px;line-height:1.7}
.auth-error{color:#FF9696;font-size:12.5px;min-height:18px;margin:4px 0 8px}
.cert-pick{display:flex;flex-wrap:wrap;gap:8px;margin-top:2px}
.cert-pick label{
  display:flex;align-items:center;gap:6px;padding:7px 11px;border-radius:9px;font-size:12px;cursor:pointer;
  border:1px solid var(--line);background:rgba(255,255,255,.03);color:var(--text-2);transition:.18s;
}
.cert-pick input{display:none}
.cert-pick label.on{border-color:rgba(45,225,180,.5);background:rgba(45,225,180,.1);color:#9BF6E0}

/* ---------------- 顶栏 ---------------- */
.topbar{
  position:sticky;top:0;z-index:40;backdrop-filter:blur(18px);
  background:rgba(7,12,21,.82);border-bottom:1px solid var(--line);
}
.topbar-in{max-width:1220px;margin:0 auto;padding:0 24px;height:64px;display:flex;align-items:center;gap:26px}
.logo{display:flex;align-items:center;gap:10px;cursor:pointer;flex:none}
.logo-mark{
  width:36px;height:36px;border-radius:11px;display:grid;place-items:center;flex:none;
  background:linear-gradient(140deg,#2DE1B4,#1AA6D8);color:#04121A;font-weight:800;
  box-shadow:0 8px 22px rgba(45,225,180,.3);font-size:18px;
}
.logo-text b{display:block;font-size:15px;letter-spacing:1.2px;line-height:1.2}
.logo-text span{display:block;font-size:9.5px;letter-spacing:1.6px;color:var(--muted)}
.nav{display:flex;align-items:center;gap:2px;flex:1;overflow:auto;scrollbar-width:none}
.nav::-webkit-scrollbar{display:none}
.nav-item{
  padding:9px 15px;border-radius:10px;font-size:13px;color:var(--text-2);cursor:pointer;
  border:1px solid transparent;transition:.2s;white-space:nowrap;
}
.nav-item:hover{color:var(--text);background:rgba(255,255,255,.04)}
.nav-item.on{color:#8BF4DA;background:rgba(45,225,180,.09);border-color:rgba(45,225,180,.2)}
.top-right{display:flex;align-items:center;gap:10px;flex:none}
.stat-chip{display:flex;align-items:center;gap:6px;padding:6px 11px;border-radius:10px;background:rgba(255,255,255,.04);border:1px solid var(--line);font-size:12px;color:var(--text-2)}
.stat-chip b{color:var(--text);font-size:12.5px}
.avatar{width:34px;height:34px;border-radius:50%;display:grid;place-items:center;font-size:12px;font-weight:700;cursor:pointer;border:1px solid rgba(255,255,255,.14);color:#04121A}

/* ---------------- 首页 ---------------- */
.hero{
  display:grid;grid-template-columns:1fr 300px;gap:22px;padding:28px 30px;overflow:hidden;
  background:radial-gradient(620px 320px at 88% -10%,rgba(131,147,255,.18),transparent 62%),
             radial-gradient(520px 300px at 4% 110%,rgba(45,225,180,.13),transparent 60%),
             linear-gradient(155deg,#101C2E,#0A1320);
}
.hero h2{margin:8px 0 10px;font-size:26px;line-height:1.3;letter-spacing:.4px}
.hero h2 span{background:linear-gradient(100deg,#2DE1B4,#7FE0FF);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p{margin:0 0 18px;color:var(--text-2);max-width:560px;font-size:13.5px}
.hero-actions{display:flex;gap:10px;flex-wrap:wrap}
.hero-side{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;border-left:1px dashed var(--line);padding-left:20px}
.hero-side .ring-num{font-size:12px;color:var(--muted);text-align:center}
.dash-grid{display:grid;grid-template-columns:1.55fr 1fr;gap:18px;margin-top:18px}
.sec-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}
.sec-head h3{margin:0;font-size:15px;letter-spacing:.4px}
.sec-head a{font-size:12px;color:var(--muted);cursor:pointer}
.sec-head a:hover{color:var(--accent)}

.task{display:flex;align-items:center;gap:14px;padding:13px 0;border-bottom:1px dashed var(--line);cursor:pointer}
.task:last-child{border-bottom:none;padding-bottom:0}
.task-ico{width:38px;height:38px;border-radius:11px;display:grid;place-items:center;font-size:16px;flex:none;background:rgba(45,225,180,.1);border:1px solid rgba(45,225,180,.18)}
.task-t{flex:1;min-width:0}
.task-t b{display:block;font-size:13px;margin-bottom:2px}
.task-t span{font-size:11.5px;color:var(--muted);display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.task-go{font-size:19px;color:var(--muted);transition:.2s}
.task:hover .task-go{color:var(--accent);transform:translateX(3px)}

.mini-list{display:flex;flex-direction:column;gap:11px}
.mini-row{display:flex;align-items:center;gap:10px}
.mini-row .dot{width:8px;height:8px;border-radius:50%;flex:none}
.mini-row .mini-t{flex:1;min-width:0;font-size:12.5px;color:var(--text-2);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.mini-row b{font-size:12px;color:var(--text);flex:none}

.post-mini{padding:11px 0;border-bottom:1px dashed var(--line);cursor:pointer}
.post-mini:last-child{border:none;padding-bottom:0}
.post-mini b{display:block;font-size:12.5px;margin-bottom:3px;font-weight:600}
.post-mini span{font-size:11.5px;color:var(--muted)}

/* ---------------- 证书体系 ---------------- */
.cert-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(278px,1fr));gap:16px}
.cert-card{padding:21px 21px 18px;cursor:pointer;overflow:hidden;transition:.24s;border-radius:var(--radius)}
.cert-card::before{content:"";position:absolute;inset:0;opacity:.11;background:radial-gradient(320px 200px at 88% -12%,var(--acc,#2DE1B4),transparent 66%);pointer-events:none}
.cert-card:hover{transform:translateY(-4px);border-color:rgba(255,255,255,.22)}
.cert-top{display:flex;align-items:flex-start;justify-content:space-between;margin-bottom:12px}
.cert-ico{width:44px;height:44px;border-radius:13px;display:grid;place-items:center;font-size:19px;background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.09);flex:none}
.cert-card h4{margin:0 0 5px;font-size:17px;letter-spacing:.3px}
.cert-card .cert-code{font-size:11px;letter-spacing:1.4px;color:var(--muted);text-transform:uppercase}
.cert-card p{margin:10px 0 14px;color:var(--text-2);font-size:12.5px;min-height:38px}
.cert-meta{display:flex;gap:14px;font-size:11.5px;color:var(--muted);margin-bottom:10px}
.cert-meta b{color:var(--text);font-weight:600}

/* 证书详情 */
.cert-detail-head{display:flex;gap:20px;align-items:flex-start;flex-wrap:wrap;padding:26px 28px;
  background:radial-gradient(480px 260px at 92% -20%,var(--acc,#2DE1B4),transparent 62%),linear-gradient(160deg,#101C2E,#0A1320)}
.level-block{margin-top:18px}
.level-head{display:flex;align-items:center;gap:12px;padding:16px 20px;cursor:pointer;border-bottom:1px solid transparent}
.level-head .lv-no{width:30px;height:30px;border-radius:9px;display:grid;place-items:center;font-size:12px;font-weight:700;background:rgba(255,255,255,.05);border:1px solid var(--line);flex:none}
.level-head h4{margin:0;font-size:14.5px}
.level-head p{margin:2px 0 0;font-size:11.5px;color:var(--muted)}
.level-block.open .level-head{border-bottom-color:var(--line)}
.lesson-list{padding:6px 10px 12px}
.lesson-row{display:flex;align-items:center;gap:12px;padding:11px 12px;border-radius:11px;cursor:pointer;transition:.18s}
.lesson-row:hover{background:rgba(255,255,255,.045)}
.lesson-stat{width:22px;height:22px;border-radius:50%;border:1px solid var(--line-strong);display:grid;place-items:center;font-size:11px;flex:none;color:var(--muted)}
.lesson-row.done .lesson-stat{background:rgba(61,220,151,.16);border-color:rgba(61,220,151,.45);color:#6FF3B8}
.lesson-row .l-t{flex:1;min-width:0}
.lesson-row .l-t b{display:block;font-size:13px;font-weight:500}
.lesson-row .l-t span{font-size:11px;color:var(--muted)}
.lock{font-size:13px;color:#5B6E88;flex:none}

/* VIP 模式与费用 */
.vip-row{display:flex;gap:16px;align-items:flex-start;justify-content:space-between;padding:14px 0;border-bottom:1px solid var(--line)}
.vip-row:last-of-type{border-bottom:0}
.vip-price{font-size:21px;font-weight:600;color:#2DE1B4;letter-spacing:.4px;line-height:1.2}

/* 课程学习 */
.lesson-layout{display:grid;grid-template-columns:264px 1fr;gap:18px;align-items:start}
.lesson-side{padding:14px;position:sticky;top:82px;max-height:calc(100vh - 110px);overflow:auto}
.side-title{font-size:11px;letter-spacing:1.6px;color:var(--muted);text-transform:uppercase;padding:6px 10px 10px}
.side-item{padding:9px 10px;border-radius:9px;font-size:12.5px;color:var(--text-2);cursor:pointer;display:flex;gap:8px;align-items:center}
.side-item:hover{background:rgba(255,255,255,.05);color:var(--text)}
.side-item.on{background:rgba(45,225,180,.1);color:#8BF4DA}
.side-item .n{width:17px;font-size:11px;color:var(--muted);flex:none}
.side-item.done .n{color:#6FF3B8}
.lesson-body{padding:28px 32px 24px;min-height:520px}
.lesson-crumb{font-size:11.5px;color:var(--muted);margin-bottom:10px}
.lesson-body h2{margin:0 0 8px;font-size:24px;line-height:1.35}
.lesson-tagline{display:flex;gap:12px;flex-wrap:wrap;align-items:center;color:var(--muted);font-size:12px;margin-bottom:20px}
.point-box{background:rgba(255,255,255,.032);border:1px solid var(--line);border-radius:14px;padding:18px 20px;margin:0 0 16px}
.point-box .pb-title{font-size:11px;letter-spacing:1.6px;color:var(--accent);font-weight:700;margin-bottom:10px}
.point{display:flex;gap:10px;padding:7px 0;font-size:13.5px;color:var(--text-2);line-height:1.7}
.point .idx{width:20px;height:20px;border-radius:6px;background:rgba(45,225,180,.12);color:#8BF4DA;font-size:11px;display:grid;place-items:center;flex:none;margin-top:2px;font-weight:700}
.mnemonic{display:flex;gap:12px;align-items:flex-start;padding:15px 18px;border-radius:13px;margin:0 0 16px;
  background:linear-gradient(120deg,rgba(255,180,84,.13),rgba(255,180,84,.04));border:1px solid rgba(255,180,84,.22)}
.mnemonic .m-ico{font-size:18px;line-height:1.4}
.mnemonic b{display:block;font-size:11px;letter-spacing:1.4px;color:#FFC987;margin-bottom:3px}
.mnemonic span{font-size:13px;color:#FFE1BC}
.warnbox{display:flex;gap:12px;padding:15px 18px;border-radius:13px;margin:0 0 18px;
  background:linear-gradient(120deg,rgba(255,107,107,.1),rgba(255,107,107,.025));border:1px solid rgba(255,107,107,.22)}
.warnbox b{display:block;font-size:11px;letter-spacing:1.4px;color:#FFA3A3;margin-bottom:3px}
.warnbox span{font-size:13px;color:#FFD0D0}
.lesson-foot{display:flex;align-items:center;justify-content:space-between;gap:12px;border-top:1px solid var(--line);padding-top:18px;margin-top:22px;flex-wrap:wrap}
.note-area{margin-top:18px}
.note-area textarea{min-height:74px;resize:vertical}

/* ---------------- 互动训练 ---------------- */
.train-tabs{display:flex;gap:8px;margin-bottom:20px;flex-wrap:wrap}
.train-tab{padding:10px 18px;border-radius:12px;border:1px solid var(--line);background:rgba(255,255,255,.03);color:var(--text-2);font-size:13px;font-weight:600;cursor:pointer;transition:.2s}
.train-tab:hover{color:var(--text);border-color:var(--line-strong)}
.train-tab.on{background:linear-gradient(135deg,rgba(45,225,180,.17),rgba(26,166,216,.12));border-color:rgba(45,225,180,.42);color:#8BF4DA}

/* 记忆翻牌 */
.mem-head{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-bottom:16px}
.mem-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.mem-card{height:104px;perspective:900px;cursor:pointer}
.mem-inner{position:relative;width:100%;height:100%;transition:transform .5s cubic-bezier(.2,.72,.3,1);transform-style:preserve-3d}
.mem-card.flipped .mem-inner{transform:rotateY(180deg)}
.mem-face{position:absolute;inset:0;backface-visibility:hidden;border-radius:14px;display:grid;place-items:center;text-align:center;padding:10px;font-size:13px;line-height:1.45;border:1px solid var(--line)}
.mem-front{background:linear-gradient(150deg,#152740,#0D1928);color:#6E85A3;font-size:22px}
.mem-back{background:linear-gradient(150deg,rgba(45,225,180,.14),rgba(26,166,216,.08));transform:rotateY(180deg);color:#CFF7EC;border-color:rgba(45,225,180,.28)}
.mem-card.matched .mem-inner{box-shadow:0 0 0 2px rgba(61,220,151,.5) inset;border-radius:14px}
.mem-card.matched{opacity:.82}
.mem-card.wrong .mem-inner{animation:shake .4s}
@keyframes shake{0%,100%{transform:rotateY(180deg) translateX(0)}25%{transform:rotateY(180deg) translateX(-6px)}75%{transform:rotateY(180deg) translateX(6px)}}

/* 话术练习 */
.script-wrap{display:grid;grid-template-columns:1fr 300px;gap:16px;align-items:start}
.script-card{padding:24px 26px}
.script-line{padding:12px 0;border-bottom:1px dashed var(--line);font-size:14px;line-height:2}
.script-line:last-child{border-bottom:none}
.blank{
  display:inline-block;min-width:76px;padding:0 8px;margin:0 2px;border-radius:6px;
  border-bottom:1.5px solid rgba(45,225,180,.5);background:rgba(45,225,180,.07);color:#8BF4DA;
  text-align:center;font-size:13px;outline:none;cursor:text;
}
.blank:focus{border-bottom-color:#2DE1B4;background:rgba(45,225,180,.14)}
.blank.ok{color:#6FF3B8;border-color:rgba(61,220,151,.7);background:rgba(61,220,151,.12)}
.blank.no{color:#FFA3A3;border-color:rgba(255,107,107,.7);background:rgba(255,107,107,.1);text-decoration:line-through}
.kw-hint{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}
.kw{padding:5px 11px;border-radius:8px;font-size:11.5px;background:rgba(255,255,255,.05);border:1px dashed var(--line-strong);color:var(--text-2);cursor:pointer}
.kw.used{opacity:.35;text-decoration:line-through}
.script-speak{display:inline-flex;align-items:center;gap:6px;padding:6px 12px;border-radius:9px;background:rgba(131,147,255,.12);border:1px solid rgba(131,147,255,.26);color:#B4BEFF;font-size:12px;cursor:pointer}
.score-panel{padding:20px;position:sticky;top:82px}

/* 对练 */
.chat{display:flex;flex-direction:column;gap:14px;padding:6px 2px 14px;max-height:56vh;overflow:auto}
.chat-row{display:flex;gap:10px;align-items:flex-start;animation:fadeUp .32s both}
.chat-row.me{flex-direction:row-reverse}
.chat-ava{width:32px;height:32px;border-radius:9px;display:grid;place-items:center;font-size:13px;flex:none;background:rgba(255,255,255,.06);border:1px solid var(--line)}
.chat-row.me .chat-ava{background:rgba(45,225,180,.16);border-color:rgba(45,225,180,.3);color:#8BF4DA}
.bubble{max-width:78%;padding:12px 15px;border-radius:14px;font-size:13.5px;line-height:1.75;
  background:linear-gradient(150deg,#14243A,#111C2C);border:1px solid var(--line);border-top-left-radius:5px}
.chat-row.me .bubble{background:linear-gradient(150deg,rgba(45,225,180,.16),rgba(26,166,216,.1));border-color:rgba(45,225,180,.3);border-top-left-radius:14px;border-top-right-radius:5px;color:#D9FFF4}
.opt-list{display:flex;flex-direction:column;gap:9px;margin-top:8px}
.opt{display:flex;gap:11px;padding:12px 15px;border-radius:12px;border:1px solid var(--line);background:rgba(255,255,255,.03);font-size:13px;line-height:1.65;cursor:pointer;transition:.16s;text-align:left;color:var(--text-2)}
.opt:hover{border-color:rgba(45,225,180,.4);background:rgba(45,225,180,.06);color:var(--text)}
.opt .k{width:22px;height:22px;border-radius:7px;background:rgba(255,255,255,.06);display:grid;place-items:center;font-size:11px;flex:none;color:var(--muted);font-weight:700}
.opt.picked{border-color:rgba(45,225,180,.55);background:rgba(45,225,180,.1)}
.opt.good{border-color:rgba(61,220,151,.6);background:rgba(61,220,151,.12)}
.opt.bad{border-color:rgba(255,107,107,.5);background:rgba(255,107,107,.09)}
.feedback{padding:11px 14px;border-radius:11px;font-size:12.5px;margin-top:9px;line-height:1.7;border:1px solid transparent}
.feedback.good{background:rgba(61,220,151,.1);border-color:rgba(61,220,151,.24);color:#9CF6C9}
.feedback.bad{background:rgba(255,107,107,.09);border-color:rgba(255,107,107,.22);color:#FFB8B8}

/* ---------------- 题库 ---------------- */
.quiz-top{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:16px}
.chip{padding:7px 13px;border-radius:999px;border:1px solid var(--line);background:rgba(255,255,255,.03);font-size:12px;color:var(--text-2);cursor:pointer;transition:.18s}
.chip:hover{border-color:var(--line-strong);color:var(--text)}
.chip.on{border-color:rgba(45,225,180,.45);background:rgba(45,225,180,.11);color:#8BF4DA}
.q-card{padding:26px 30px}
.q-meta{display:flex;align-items:center;gap:10px;margin-bottom:14px;flex-wrap:wrap}
.q-stem{font-size:16.5px;line-height:1.75;margin:0 0 18px;font-weight:600}
.opt-list.q .opt{padding:13px 16px}
.opt.correct{border-color:rgba(61,220,151,.65);background:rgba(61,220,151,.13);color:#D8FFEE}
.opt.wrong{border-color:rgba(255,107,107,.6);background:rgba(255,107,107,.1);color:#FFD5D5}
.opt.dim{opacity:.55}
.explain{margin-top:16px;padding:15px 18px;border-radius:13px;background:rgba(131,147,255,.08);border:1px solid rgba(131,147,255,.2);font-size:13px;color:#CFD6FF;line-height:1.8;display:none}
.explain.show{display:block}
.q-foot{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:18px;flex-wrap:wrap}

/* ---------------- 模拟考试 ---------------- */
.exam-hero{display:grid;grid-template-columns:1fr auto;gap:24px;align-items:center;padding:30px 32px;
  background:radial-gradient(560px 300px at 88% -18%,rgba(255,180,84,.16),transparent 62%),linear-gradient(155deg,#131F31,#0A1320)}
.exam-rules{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px;margin:22px 0}
.rule{padding:14px 16px;border-radius:12px;background:rgba(255,255,255,.035);border:1px solid var(--line)}
.rule b{display:block;font-size:12px;color:var(--muted);font-weight:500;margin-bottom:3px}
.rule span{font-size:15px;font-weight:700}
.exam-bar{display:flex;align-items:center;gap:14px;padding:14px 20px;margin-bottom:16px;position:sticky;top:76px;z-index:20;
  background:rgba(11,18,29,.9);backdrop-filter:blur(14px);border:1px solid var(--line);border-radius:14px;flex-wrap:wrap}
.timer{font-variant-numeric:tabular-nums;font-size:18px;font-weight:700;letter-spacing:1px;color:#FFC987}
.timer.low{color:#FF8A8A;animation:glowPulse 1s infinite}
.q-nav{display:grid;grid-template-columns:repeat(10,1fr);gap:7px;margin-top:16px}
.q-dot{aspect-ratio:1;border-radius:8px;border:1px solid var(--line);background:rgba(255,255,255,.03);display:grid;place-items:center;font-size:11.5px;color:var(--muted);cursor:pointer;transition:.16s}
.q-dot.done{border-color:rgba(45,225,180,.4);background:rgba(45,225,180,.1);color:#8BF4DA}
.q-dot.cur{border-color:#FFB454;color:#FFC987;box-shadow:0 0 0 2px rgba(255,180,84,.25)}
.result-score{font-size:46px;font-weight:800;letter-spacing:1px;line-height:1}
.pass-badge{display:inline-flex;align-items:center;gap:8px;padding:8px 16px;border-radius:999px;font-size:13px;font-weight:700}
.pass-badge.ok{background:rgba(61,220,151,.14);color:#7FF3BE;border:1px solid rgba(61,220,151,.35)}
.pass-badge.no{background:rgba(255,107,107,.12);color:#FFA8A8;border:1px solid rgba(255,107,107,.3)}

/* ---------------- 社区 / 成就 ---------------- */
.community-grid{display:grid;grid-template-columns:1fr 320px;gap:18px;align-items:start}
.post{padding:20px 22px;margin-bottom:14px}
.post-head{display:flex;align-items:center;gap:10px;margin-bottom:10px}
.post-head .who b{font-size:13px}
.post-head .who span{font-size:11px;color:var(--muted);margin-left:6px}
.post h4{margin:0 0 7px;font-size:15px}
.post p{margin:0;color:var(--text-2);font-size:13px;line-height:1.8;white-space:pre-wrap}
.post-acts{display:flex;gap:16px;margin-top:13px;font-size:12px;color:var(--muted);align-items:center}
.post-acts .act{cursor:pointer;display:flex;align-items:center;gap:5px;transition:.16s}
.post-acts .act:hover{color:var(--accent)}
.post-acts .act.on{color:#8BF4DA}
.cmts{margin-top:12px;padding-top:12px;border-top:1px dashed var(--line);display:flex;flex-direction:column;gap:9px}
.cmt{font-size:12.5px;color:var(--text-2);line-height:1.7}
.cmt b{color:#9BF6E0;font-weight:600;margin-right:6px}
.cmt-input{display:flex;gap:8px;margin-top:6px}
.cmt-input input{flex:1;padding:9px 12px;border-radius:10px;background:rgba(255,255,255,.04);border:1px solid var(--line);color:var(--text);outline:none;font-size:12.5px}
.cmt-input input:focus{border-color:rgba(45,225,180,.45)}
.rank-row{display:flex;align-items:center;gap:11px;padding:10px 0;border-bottom:1px dashed var(--line)}
.rank-row:last-child{border:none}
.rank-no{width:22px;font-size:13px;font-weight:700;color:var(--muted);text-align:center;flex:none}
.rank-row.top1 .rank-no{color:#FFD37E}
.rank-row.top2 .rank-no{color:#C9D6E8}
.rank-row.top3 .rank-no{color:#E5A07C}
.rank-row .rk-name{flex:1;font-size:12.5px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.rank-row .rk-pts{font-size:12px;color:var(--accent);font-weight:700;flex:none}

/* 成就墙 */
.badge-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(148px,1fr));gap:12px}
.badge-item{padding:16px 14px;border-radius:14px;text-align:center;border:1px solid var(--line);background:rgba(255,255,255,.028)}
.badge-item .bi-ico{width:46px;height:46px;margin:0 auto 10px;border-radius:50%;display:grid;place-items:center;font-size:21px;background:rgba(255,255,255,.05);filter:grayscale(1);opacity:.5}
.badge-item.got{border-color:rgba(255,180,84,.38);background:linear-gradient(160deg,rgba(255,180,84,.12),rgba(255,180,84,.02))}
.badge-item.got .bi-ico{filter:none;opacity:1;background:radial-gradient(circle at 30% 25%,#FFD79A,#F2A03C);box-shadow:0 8px 22px rgba(255,180,84,.28)}
.badge-item b{display:block;font-size:12.5px;margin-bottom:3px}
.badge-item span{font-size:11px;color:var(--muted);line-height:1.5}
.badge-item.locked b{color:var(--muted)}

/* 个人中心 */
.profile-head{display:flex;align-items:center;gap:18px;padding:24px 26px;flex-wrap:wrap;
  background:radial-gradient(520px 260px at 90% -20%,rgba(45,225,180,.15),transparent 62%),linear-gradient(155deg,#101C2E,#0A1320)}
.avatar-lg{width:66px;height:66px;border-radius:20px;display:grid;place-items:center;font-size:22px;font-weight:800;color:#04121A;flex:none}
.stat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(128px,1fr));gap:12px;margin-top:16px}
.stat{padding:15px 16px;border-radius:13px;background:rgba(255,255,255,.032);border:1px solid var(--line)}
.stat b{display:block;font-size:20px;font-weight:800;letter-spacing:.4px}
.stat span{font-size:11.5px;color:var(--muted)}
.bar-row{display:flex;align-items:center;gap:12px;padding:9px 0;font-size:12.5px}
.bar-row .bl{width:110px;flex:none;color:var(--text-2);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.bar-row .bar{flex:1}
.bar-row .bv{width:40px;text-align:right;color:var(--muted);font-size:11.5px;flex:none}
.empty{padding:40px 20px;text-align:center;color:var(--muted);font-size:13px}

/* ---------------- 弹层 / Toast ---------------- */
.modal-mask{position:fixed;inset:0;z-index:100;background:rgba(3,7,13,.7);backdrop-filter:blur(6px);display:grid;place-items:center;padding:24px;animation:fadeIn .22s both}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}
.modal{width:min(520px,100%);max-height:86vh;overflow:auto;border-radius:20px;background:linear-gradient(160deg,#122033,#0B1523);border:1px solid var(--line-strong);box-shadow:0 30px 80px rgba(0,0,0,.55);padding:26px 28px;animation:fadeUp .3s both}
.modal.wide{width:min(720px,100%)}
.modal h3{margin:0 0 6px;font-size:18px}
.modal .m-sub{color:var(--muted);font-size:12.5px;margin:0 0 18px}
.modal-foot{display:flex;gap:10px;justify-content:flex-end;margin-top:22px}
.toast-layer{position:fixed;right:22px;top:78px;z-index:200;display:flex;flex-direction:column;gap:9px;pointer-events:none}
.toast{
  min-width:210px;max-width:330px;padding:12px 15px;border-radius:12px;font-size:12.5px;line-height:1.6;
  background:linear-gradient(150deg,#16273C,#101B2B);border:1px solid rgba(45,225,180,.32);
  box-shadow:0 14px 36px rgba(0,0,0,.45);animation:toastIn .32s cubic-bezier(.2,.8,.3,1) both;display:flex;gap:9px;align-items:flex-start;
}
.toast.out{animation:toastOut .28s both}
.toast b{color:#8BF4DA;display:block;font-size:12.5px}
.toast span{color:var(--text-2);font-size:11.5px}
@keyframes toastIn{from{opacity:0;transform:translateX(24px)}to{opacity:1;transform:none}}
@keyframes toastOut{to{opacity:0;transform:translateX(24px)}}

/* ---------------- 响应式 ---------------- */
@media (max-width:1080px){
  .auth-page{grid-template-columns:1fr}
  .auth-brand{padding:34px 28px;min-height:auto}
  .auth-brand h1{font-size:30px}
  .auth-side{padding:30px 24px 50px}
  .hero{grid-template-columns:1fr}
  .hero-side{border-left:none;border-top:1px dashed var(--line);padding:18px 0 0;flex-direction:row;gap:20px;justify-content:flex-start}
  .dash-grid,.community-grid{grid-template-columns:1fr}
  .lesson-layout{grid-template-columns:1fr}
  .lesson-side{position:static;max-height:none}
  .script-wrap{grid-template-columns:1fr}
  .score-panel{position:static}
  .nav-item{padding:8px 11px}
  .topbar-in{gap:14px;padding:0 16px}
  .page{padding:20px 16px 60px}
}
@media (max-width:760px){
  .top-right .stat-chip{display:none}
  .topbar-in{height:auto;padding:10px 14px;flex-wrap:wrap;gap:10px}
  .nav{order:3;width:100%;flex:none}
  .top-right{margin-left:auto}
  .mem-grid{grid-template-columns:repeat(3,1fr)}
  .mem-card{height:92px}
  .hero{padding:22px}
  .lesson-body{padding:20px}
  .q-card{padding:20px}
  .q-nav{grid-template-columns:repeat(8,1fr)}
  .post-acts{flex-wrap:wrap;gap:12px}
  .auth-brand .auth-quote{display:none}
  .exam-hero{grid-template-columns:1fr;padding:22px}
  .lesson-body h2{font-size:19px}
  .page-title{font-size:20px}
}
@media (max-width:420px){
  .mem-grid{grid-template-columns:repeat(2,1fr)}
}