:root{
  --bg:#fbfbfd; --bg-soft:#f5f5f8; --card:#fff;
  --line:#ececf1; --line-2:#e2e2ea;
  --ink:#16161a; --ink-2:#5a5a6a; --ink-3:#9a9aab;
  --accent:#6366f1; --accent-2:#a855f7; --accent-sf:#eef0ff;
  --ok:#10b981; --ok-soft:#e7f8f1;
  --bad:#ef4444; --bad-soft:#fdecec;
  --warn:#f59e0b;
  --r:16px; --r-lg:22px;
  --shadow-sm:0 1px 2px rgba(16,16,32,.04);
  --shadow:0 1px 2px rgba(16,16,32,.04), 0 10px 28px -14px rgba(16,16,32,.16);
  --shadow-lg:0 2px 4px rgba(16,16,32,.04), 0 24px 56px -24px rgba(16,16,32,.22);
}
*{margin:0;padding:0;box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html{-webkit-text-size-adjust:100%}
body{
  min-height:100vh;display:flex;flex-direction:column;
  background:var(--bg);color:var(--ink);font-size:15px;line-height:1.65;
  font-family:"Inter","PingFang SC","Hiragino Sans GB","Microsoft YaHei",
              -apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
button{font-family:inherit}
img{max-width:100%;display:block}

/* ============================================================
   顶栏
   ============================================================ */
.topbar{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,.88);
  backdrop-filter:saturate(180%) blur(18px);
  -webkit-backdrop-filter:saturate(180%) blur(18px);
  border-bottom:1px solid var(--line);
}
.topbar-inner{
  max-width:1200px;margin:0 auto;
  padding:0 22px;height:62px;
  display:flex;align-items:center;gap:20px;
}
.logo{
  display:flex;align-items:center;gap:10px;
  font-weight:800;font-size:17px;letter-spacing:-.3px;
  flex-shrink:0;
}
.logo-mark{
  width:32px;height:32px;border-radius:10px;display:grid;place-items:center;
  font-size:16px;color:#fff;
  background:linear-gradient(135deg,var(--accent),var(--accent-2));
  box-shadow:0 6px 16px -6px rgba(99,102,241,.7);
}
.logo-text em{font-style:normal;color:var(--accent)}

.topnav{display:flex;gap:4px;flex-shrink:0}
.nav-link{
  position:relative;
  padding:7px 12px;border-radius:9px;
  font-size:13.5px;font-weight:600;color:var(--ink-2);
  transition:.18s;white-space:nowrap;
}
.nav-link:hover{background:var(--bg-soft);color:var(--ink)}
.nav-link.active{background:var(--accent-sf);color:var(--accent)}

.userbox{margin-left:auto;display:flex;align-items:center;gap:10px;flex-shrink:0}
.avatar{
  width:32px;height:32px;border-radius:50%;display:grid;place-items:center;
  font-size:13px;font-weight:700;color:#fff;
  background:linear-gradient(135deg,#6366f1,#a855f7);
  flex-shrink:0;
}
.uname{
  font-size:14px;font-weight:600;color:var(--ink-2);
  max-width:100px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
}
.btn-ghost{
  padding:7px 14px;border-radius:9px;font-size:13px;font-weight:600;
  color:var(--ink-2);background:#fff;border:1px solid var(--line-2);
  cursor:pointer;transition:.18s;white-space:nowrap;
}
.btn-ghost:hover{background:var(--bg-soft);color:var(--ink);border-color:#d4d4e0}

/* 血量 */
.heart-badge{
  position:relative;
  display:flex;align-items:center;gap:6px;
  padding:6px 12px;
  background:linear-gradient(135deg,#fff5f5,#ffe8ec);
  border:1px solid #ffd6de;border-radius:11px;
  font-size:13px;font-weight:700;color:#be123c;
  flex-shrink:0;
}
.hb-icon{font-size:13px;line-height:1}
.hb-text{font-variant-numeric:tabular-nums}
.hb-bar{width:36px;height:4px;border-radius:99px;background:rgba(190,18,60,.15);overflow:hidden}
.hb-bar i{display:block;height:100%;border-radius:99px;background:linear-gradient(90deg,#f43f5e,#ec4899);transition:width .5s}

.heart-pop{
  position:absolute;right:-6px;top:-8px;
  font-size:13px;font-weight:900;
  padding:2px 7px;border-radius:99px;
  pointer-events:none;
  animation:heartPop 1s cubic-bezier(.2,.8,.3,1) forwards;
}
.heart-pop.gain{color:#047857;background:#d1fae5}
.heart-pop.loss{color:#be123c;background:#ffe4e6}
@keyframes heartPop{
  0%{opacity:0;transform:translateY(6px) scale(.8)}
  30%{opacity:1;transform:translateY(-6px) scale(1.1)}
  100%{opacity:0;transform:translateY(-22px) scale(1)}
}

/* 导航红点 */
.nav-dot{
  display:inline-block;
  min-width:16px;height:16px;padding:0 4px;
  margin-left:5px;
  background:linear-gradient(135deg,#ef4444,#f43f5e);
  color:#fff;border-radius:99px;
  font-size:10px;font-weight:800;
  line-height:16px;text-align:center;
  vertical-align:2px;
  box-shadow:0 0 0 2px #fff;
  animation:navPulse 1.6s ease-in-out infinite;
}
.nav-dot-wb{background:linear-gradient(135deg,#f59e0b,#ea580c)}
@keyframes navPulse{0%,100%{transform:scale(1)}50%{transform:scale(1.15)}}

/* ============================================================
   页面容器
   ============================================================ */
.page{
  flex:1;width:100%;
  max-width:1080px;margin:0 auto;
  padding:34px 22px 60px;
}
.page-auth{
  max-width:none;
  display:flex;align-items:center;justify-content:center;
  padding:40px 22px;
}
.page-pk,.page-wb,.page-goals{max-width:1200px}
.page-daily{max-width:760px}

.site-footer{
  border-top:1px solid var(--line);
  padding:22px;text-align:center;
  font-size:12.5px;color:var(--ink-3);
}

/* ============================================================
   按钮
   ============================================================ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;font-size:14.5px;font-weight:700;
  border-radius:12px;border:none;cursor:pointer;transition:.2s;
  white-space:nowrap;text-decoration:none;
}
.btn-primary{
  color:#fff;background:linear-gradient(135deg,var(--accent),var(--accent-2));
  box-shadow:0 10px 24px -12px rgba(99,102,241,.85);
}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 16px 32px -14px rgba(168,85,247,.85)}
.btn-primary:disabled{opacity:.55;cursor:not-allowed;transform:none;box-shadow:none}
.btn-plain{color:var(--ink-2);background:#fff;border:1px solid var(--line-2)}
.btn-plain:hover{background:var(--bg-soft);color:var(--ink)}
.btn-block{width:100%}

/* ============================================================
   认证页
   ============================================================ */
.auth-card{
  width:100%;max-width:420px;background:var(--card);
  border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--shadow-lg);padding:38px 34px 30px;
}
.auth-brand{text-align:center;margin-bottom:28px}
.auth-brand .logo-mark{width:54px;height:54px;border-radius:17px;font-size:24px;margin:0 auto 16px}
.auth-brand h1{font-size:22px;font-weight:800;letter-spacing:-.4px}
.auth-brand p{font-size:13.5px;color:var(--ink-3);margin-top:6px}
.field{margin-bottom:14px}
.field label{display:block;font-size:12.5px;font-weight:700;color:var(--ink-2);margin-bottom:7px}
.field input{
  width:100%;padding:13px 15px;font-size:15px;font-family:inherit;color:var(--ink);
  background:#fff;border:1px solid var(--line-2);border-radius:12px;outline:none;transition:.2s;
}
.field input:focus{border-color:var(--accent);box-shadow:0 0 0 3.5px rgba(99,102,241,.13)}
.field.has-error input{border-color:var(--bad);box-shadow:0 0 0 3.5px rgba(239,68,68,.1)}
.form-msg{display:none;padding:10px 14px;border-radius:11px;font-size:13px;font-weight:600;margin-bottom:16px}
.form-msg.show{display:block}
.form-msg.err{background:var(--bad-soft);color:#b91c1c}
.form-msg.ok{background:var(--ok-soft);color:#047857}
.auth-alt{text-align:center;font-size:13.5px;color:var(--ink-3);margin-top:22px}
.auth-alt a{color:var(--accent);font-weight:700}

/* ============================================================
   仪表盘
   ============================================================ */
.dash-hero{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--shadow);padding:30px;margin-bottom:28px;
  position:relative;overflow:hidden;
}
.dash-hero::before{
  content:'';position:absolute;top:-70px;right:-70px;width:220px;height:220px;border-radius:50%;
  background:radial-gradient(circle,rgba(99,102,241,.13),transparent 68%);pointer-events:none;
}
.dash-hero h1{font-size:25px;font-weight:800;letter-spacing:-.5px;margin-bottom:6px}
.dash-hero p{font-size:14px;color:var(--ink-3);margin-bottom:22px;line-height:1.6}

.progress-row{display:flex;align-items:center;gap:16px;flex-wrap:wrap}
.progress-track{flex:1;min-width:160px;height:9px;background:var(--bg-soft);border-radius:99px;overflow:hidden}
.progress-fill{height:100%;border-radius:99px;background:linear-gradient(90deg,var(--accent),var(--accent-2));transition:width .7s}
.progress-label{font-size:13.5px;font-weight:700;color:var(--ink-2);font-variant-numeric:tabular-nums;white-space:nowrap}

.dash-hearts{
  margin-top:24px;padding:16px 18px;
  background:linear-gradient(135deg,#fff5f5,#ffe8ec);
  border:1px solid #ffd6de;border-radius:14px;
}
.dh-info{display:flex;align-items:baseline;gap:12px;flex-wrap:wrap;margin-bottom:9px}
.dh-label{font-size:12.5px;font-weight:700;color:#be123c;letter-spacing:.3px}
.dh-value{font-size:20px;font-weight:800;color:#be123c;font-variant-numeric:tabular-nums}
.dh-hint{font-size:11.5px;color:#e11d48;opacity:.75;margin-left:auto}
.dh-bar{height:6px;border-radius:99px;background:rgba(190,18,60,.12);overflow:hidden}
.dh-fill{height:100%;border-radius:99px;background:linear-gradient(90deg,#f43f5e,#ec4899);transition:width .8s}

/* 目标卡 */
.dash-goal{
  display:flex;align-items:center;gap:14px;
  margin-top:20px;padding:16px 20px;
  background:linear-gradient(135deg,#f5f3ff,#fdf4ff);
  border:1px solid #ddd6fe;border-radius:14px;
}
.dash-goal-empty{background:#fafafd;border-color:#ececf1}
.dash-goal-icon{font-size:28px;flex-shrink:0}
.dash-goal-info{flex:1;min-width:0}
.dash-goal-label{font-size:13.5px;font-weight:800;color:#5b21b6;margin-bottom:3px}
.dash-goal-empty .dash-goal-label{color:#5a5a6a}
.dash-goal-desc{font-size:12.5px;color:#7c3aed;line-height:1.5}
.dash-goal-empty .dash-goal-desc{color:#8a8a99}

/* 对战提示 */
.pk-alert{
  display:flex;align-items:center;gap:16px;
  padding:18px 22px;
  background:linear-gradient(135deg,#fef3c7,#fde68a);
  border:1px solid #fcd34d;border-radius:16px;
  margin-bottom:24px;
}
.pk-alert-icon{font-size:32px;flex-shrink:0}
.pk-alert-body{flex:1;min-width:0}
.pk-alert-body h3{font-size:15px;font-weight:800;color:#92400e;margin-bottom:6px}
.pk-alert-body p{font-size:13px;color:#a16207;line-height:1.7}
.pk-alert-item{
  display:inline-flex;align-items:center;gap:5px;
  padding:3px 9px;margin-right:6px;margin-bottom:3px;
  background:rgba(255,255,255,.7);border-radius:99px;
}
.pk-alert-item b{color:#16161a}
.pk-alert-item em{font-style:normal;font-size:10px;font-weight:800;padding:1px 6px;border-radius:99px}
.pk-alert-item em.online{background:#d1fae5;color:#047857}
.pk-alert-item em.offline{background:#e2e8f0;color:#64748b}

/* 今日刷题榜 */
.checkin-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--shadow);padding:22px 24px;margin-bottom:26px;
}
.checkin-head{display:flex;align-items:baseline;gap:12px;margin-bottom:16px;flex-wrap:wrap}
.checkin-head h3{font-size:16px;font-weight:800;letter-spacing:-.2px}
.checkin-sub{font-size:12.5px;color:var(--ink-3)}
.checkin-grid{
  display:grid;gap:12px;
  grid-template-columns:repeat(auto-fill,minmax(160px,1fr));
}
.checkin-item{
  position:relative;
  padding:14px 14px 12px;
  background:var(--bg-soft);
  border:1px solid var(--line);
  border-radius:14px;
  transition:.22s;
}
.checkin-item:hover{transform:translateY(-2px);background:#fff;border-color:#d8d8e6;box-shadow:var(--shadow)}
.checkin-item.rank-1{background:linear-gradient(160deg,#fffbeb,#fff6d8);border-color:#fde68a}
.checkin-item.rank-2{background:linear-gradient(160deg,#f8fafc,#eef2f7);border-color:#cbd5e1}
.checkin-item.rank-3{background:linear-gradient(160deg,#fff8f3,#ffeedd);border-color:#fcd9b6}
.checkin-item.me{border-color:#c4b5fd;box-shadow:0 0 0 2px rgba(167,139,250,.28)}
.ci-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:10px}
.ci-avatar{
  width:38px;height:38px;border-radius:50%;
  display:grid;place-items:center;
  font-size:15px;font-weight:800;color:#fff;
  background:linear-gradient(135deg,#6366f1,#a855f7);
  box-shadow:0 4px 10px -4px rgba(99,102,241,.6);
  flex-shrink:0;
}
.rank-1 .ci-avatar{background:linear-gradient(135deg,#f59e0b,#fbbf24)}
.rank-2 .ci-avatar{background:linear-gradient(135deg,#94a3b8,#cbd5e1)}
.rank-3 .ci-avatar{background:linear-gradient(135deg,#ea580c,#fb923c)}
.ci-medal{font-size:20px;line-height:1}
.ci-rank{
  font-size:11px;font-weight:800;color:var(--ink-3);
  padding:3px 8px;border-radius:99px;
  background:rgba(255,255,255,.7);border:1px solid var(--line-2);
}
.ci-name{
  font-size:13.5px;font-weight:700;color:var(--ink);
  display:flex;align-items:center;gap:6px;
  margin-bottom:10px;
  overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
}
.ci-name em{font-style:normal;font-size:10px;font-weight:800;color:#fff;background:linear-gradient(135deg,#6366f1,#a855f7);padding:1px 6px;border-radius:99px}
.ci-stats{
  display:grid;grid-template-columns:1fr 1fr;gap:6px;
  padding:8px 0;
  border-top:1px dashed var(--line-2);
  border-bottom:1px dashed var(--line-2);
  margin-bottom:8px;
}
.ci-stat{text-align:center}
.ci-stat b{display:block;font-size:16px;font-weight:800;color:var(--accent);font-variant-numeric:tabular-nums;line-height:1.15}
.ci-stat b i{font-style:normal;font-size:11px;font-weight:700;color:var(--ink-3);margin-left:1px}
.ci-stat span{display:block;font-size:10.5px;color:var(--ink-3);margin-top:1px}
.rank-1 .ci-stat b{color:#d97706}
.rank-2 .ci-stat b{color:#64748b}
.rank-3 .ci-stat b{color:#ea580c}
.ci-time{display:flex;align-items:center;justify-content:center;font-size:11.5px;color:var(--ink-3);font-weight:600}

/* ============================================================
   模块 + 课程卡
   ============================================================ */
.module{margin-bottom:38px}
.module-head{display:flex;align-items:flex-start;gap:14px;margin-bottom:18px}
.m-icon{
  width:46px;height:46px;flex-shrink:0;border-radius:14px;
  display:grid;place-items:center;font-size:21px;
  background:color-mix(in srgb, var(--ac) 12%, #fff);
  border:1px solid color-mix(in srgb, var(--ac) 22%, #fff);
}
.module-head h2{font-size:19px;font-weight:800;letter-spacing:-.3px}
.module-head p{font-size:13.5px;color:var(--ink-3);margin-top:3px}

.lesson-list{display:grid;gap:11px}
.lesson-card{
  display:flex;align-items:center;gap:15px;padding:16px 18px;
  background:var(--card);border:1px solid var(--line);border-radius:var(--r);
  box-shadow:var(--shadow-sm);transition:.22s;
}
.lesson-card:hover{border-color:#d8d8e6;box-shadow:var(--shadow);transform:translateY(-2px)}
.lesson-index{
  width:36px;height:36px;flex-shrink:0;border-radius:11px;
  display:grid;place-items:center;
  font-size:14px;font-weight:800;
  background:var(--bg-soft);color:var(--ink-3);
  font-variant-numeric:tabular-nums;
}
.lesson-body{flex:1;min-width:0}
.lesson-body h3{font-size:15px;font-weight:700;letter-spacing:-.2px;display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.lesson-body p{font-size:13px;color:var(--ink-3);margin-top:2px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.lesson-state{flex-shrink:0;font-size:19px;color:var(--ink-3)}
.lesson-card.locked{opacity:.6;cursor:not-allowed;background:var(--bg-soft);box-shadow:none}
.lesson-card.locked:hover{transform:none;box-shadow:none;border-color:var(--line)}
.lesson-card.locked .lesson-body h3{color:var(--ink-3)}

/* ============================================================
   课程页
   ============================================================ */
.lesson-head{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--shadow);padding:28px 30px;margin-bottom:26px;
}
.crumb{font-size:12.5px;font-weight:600;color:var(--ink-3);display:flex;gap:7px;margin-bottom:12px;flex-wrap:wrap}
.crumb a:hover{color:var(--accent)}
.lesson-head h1{font-size:26px;font-weight:800;letter-spacing:-.6px;line-height:1.3}
.lesson-head .summary{font-size:14.5px;color:var(--ink-3);margin-top:8px}
.lesson-score-bar{display:flex;gap:10px;margin-top:18px;flex-wrap:wrap}
.lsb-item{
  padding:8px 14px;border-radius:10px;
  background:var(--bg-soft);border:1px solid var(--line);
  font-size:12.5px;color:var(--ink-3);
  display:flex;align-items:center;gap:8px;
}
.lsb-item b{font-size:15px;font-weight:800;color:var(--ink-2);font-variant-numeric:tabular-nums}
.lsb-final{background:var(--accent-sf);border-color:#dbe0ff}
.lsb-final span{color:var(--accent)}
.lsb-final b{color:var(--accent)}

.lesson-layout{display:grid;grid-template-columns:1fr;gap:26px}
.lesson-side{position:static}
@media(min-width:900px){
  .lesson-layout{grid-template-columns:1fr 300px;align-items:start}
  .lesson-side{position:sticky;top:88px}
}

.content-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--shadow);padding:34px;
}
.blk-h{font-size:17px;font-weight:800;letter-spacing:-.3px;margin:30px 0 12px;padding-left:13px;position:relative}
.blk-h:first-child{margin-top:0}
.blk-h::before{
  content:'';position:absolute;left:0;top:5px;bottom:5px;width:4px;border-radius:4px;
  background:linear-gradient(180deg,var(--accent),var(--accent-2));
}
.blk-p{font-size:15px;line-height:1.85;color:var(--ink-2);margin-bottom:13px}
.blk-note{padding:15px 18px;margin:16px 0;background:var(--bg-soft);border-left:3px solid var(--line-2);border-radius:0 var(--r) var(--r) 0;font-size:14px;color:var(--ink-2)}
.blk-tip{
  display:flex;gap:12px;padding:15px 18px;margin:20px 0;
  background:linear-gradient(135deg,#fffbf0,#fff8e8);border:1px solid #fde9bd;
  border-radius:12px;font-size:14px;color:#8a6413;line-height:1.75;
}
.tip-icon{font-size:17px;flex-shrink:0}
.blk-list{list-style:none;margin:14px 0;display:grid;gap:9px}
.blk-list li{position:relative;padding-left:24px;font-size:14.5px;color:var(--ink-2);line-height:1.75}
.blk-list li::before{
  content:'';position:absolute;left:6px;top:10px;width:7px;height:7px;border-radius:50%;
  background:linear-gradient(135deg,var(--accent),var(--accent-2));
}
.blk-chips{display:flex;flex-wrap:wrap;gap:9px;margin:18px 0}
.chip{
  display:flex;flex-direction:column;align-items:center;
  min-width:64px;padding:11px 14px;
  background:#fff;border:1px solid var(--line-2);border-radius:12px;box-shadow:var(--shadow-sm);
}
.chip b{font-size:16px;font-weight:800}
.chip span{font-size:11.5px;color:var(--ink-3);margin-top:1px}
.blk-table{margin:18px 0;overflow-x:auto;-webkit-overflow-scrolling:touch;border:1px solid var(--line);border-radius:12px}
.blk-table table{width:100%;border-collapse:collapse;font-size:14px;min-width:400px}
.blk-table th{background:var(--bg-soft);padding:11px 15px;text-align:left;font-weight:700;font-size:13px;color:var(--ink-2);white-space:nowrap;border-bottom:1px solid var(--line)}
.blk-table td{padding:11px 15px;color:var(--ink-2);border-bottom:1px solid var(--line);white-space:nowrap}
.blk-table tr:last-child td{border-bottom:none}

.side-card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--shadow-sm);padding:20px;margin-bottom:16px}
.side-card h4{font-size:13px;font-weight:800;letter-spacing:.4px;color:var(--ink-3);text-transform:uppercase;margin-bottom:13px}
.side-list{display:grid;gap:4px}
.side-item{display:flex;align-items:center;gap:10px;padding:8px 10px;border-radius:9px;font-size:13.5px;color:var(--ink-2);transition:.16s}
.side-item:hover{background:var(--bg-soft)}
.side-item.current{background:var(--accent-sf);color:var(--accent);font-weight:700}
.side-item .dot{width:7px;height:7px;border-radius:50%;background:var(--line-2);flex-shrink:0}
.side-item.done .dot{background:var(--ok)}
.side-item.current .dot{background:var(--accent)}
.side-item.locked{opacity:.45}

/* 节奏挑战入口 */
.rhythm-cta{
  display:flex;align-items:center;gap:16px;
  padding:20px 24px;margin-top:22px;
  background:linear-gradient(135deg,#f5f3ff,#fdf4ff);
  border:1px solid #ddd6fe;border-radius:var(--r-lg);
}
.rc-icon{font-size:34px;flex-shrink:0}
.rc-body{flex:1;min-width:0}
.rc-body h3{font-size:16px;font-weight:800;color:#5b21b6;margin-bottom:4px}
.rc-body p{font-size:13.5px;color:#7c3aed;line-height:1.6}

/* 血量耗尽 */
.no-hearts{
  margin-top:22px;padding:36px 28px;
  background:linear-gradient(135deg,#fff5f5,#ffe8ec);
  border:1px solid #ffd6de;border-radius:var(--r-lg);
  text-align:center;
}
.nh-icon{font-size:44px;margin-bottom:12px}
.no-hearts h3{font-size:19px;font-weight:800;color:#be123c;margin-bottom:8px}
.no-hearts p{font-size:14px;color:#e11d48;line-height:1.75;margin-bottom:20px}
.nh-actions{display:flex;gap:11px;justify-content:center;flex-wrap:wrap}

/* ============================================================
   测验
   ============================================================ */
.quiz-card{background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--shadow);padding:30px 34px;margin-top:26px}
.quiz-head{display:flex;align-items:center;gap:12px;margin-bottom:6px;flex-wrap:wrap}
.quiz-head h2{font-size:19px;font-weight:800;letter-spacing:-.3px}
.quiz-head .badge{padding:3px 10px;border-radius:99px;font-size:11.5px;font-weight:700;background:var(--accent-sf);color:var(--accent)}
.heart-inline{
  margin-left:auto;
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:99px;
  background:linear-gradient(135deg,#fff5f5,#ffe8ec);
  border:1px solid #ffd6de;
  font-size:13px;color:#be123c;font-weight:700;
}
.heart-inline b{font-size:15px;font-weight:800}
.quiz-sub{font-size:13.5px;color:var(--ink-3);margin-bottom:26px}
.q-item{margin-bottom:26px}
.q-prompt{font-size:15px;font-weight:700;line-height:1.6;margin-bottom:14px;display:flex;gap:10px}
.q-num{flex-shrink:0;width:23px;height:23px;border-radius:7px;display:grid;place-items:center;font-size:12px;font-weight:800;background:var(--accent-sf);color:var(--accent);margin-top:1px}
.q-options{display:grid;gap:9px}
.opt{
  display:flex;align-items:center;gap:12px;padding:13px 16px;
  background:#fff;border:1.5px solid var(--line-2);border-radius:12px;
  cursor:pointer;font-size:14.5px;color:var(--ink-2);
  transition:.18s;user-select:none;
}
.opt:hover{border-color:#c8c8dc;background:var(--bg-soft)}
.opt .mark{width:20px;height:20px;flex-shrink:0;border-radius:50%;border:1.5px solid var(--line-2);display:grid;place-items:center;transition:.18s}
.opt .mark::after{content:'';width:9px;height:9px;border-radius:50%;background:transparent;transition:.18s}
.opt.selected{border-color:var(--accent);background:var(--accent-sf);color:var(--accent);font-weight:600}
.opt.selected .mark{border-color:var(--accent)}
.opt.selected .mark::after{background:var(--accent)}
.opt.correct{border-color:var(--ok);background:var(--ok-soft);color:#047857;font-weight:600}
.opt.correct .mark{border-color:var(--ok)}.opt.correct .mark::after{background:var(--ok)}
.opt.wrong{border-color:var(--bad);background:var(--bad-soft);color:#b91c1c;font-weight:600}
.opt.wrong .mark{border-color:var(--bad)}.opt.wrong .mark::after{background:var(--bad)}
.opt.disabled{pointer-events:none}
.opt.hint-correct{background:linear-gradient(90deg,#ecfdf5,#d1fae5);border-color:#10b981;color:#047857;font-weight:600}
.opt.hint-correct .mark{border-color:#10b981;background:#10b981}
.opt.hint-correct .mark::after{background:#fff}
.opt.hint-correct .hint-tag{margin-left:auto;font-size:11px;font-weight:800;color:#047857;padding:2px 8px;border-radius:99px;background:rgba(16,185,129,.15)}
.q-explain{display:none;margin-top:11px;padding:11px 15px;background:var(--bg-soft);border-radius:10px;font-size:13.5px;color:var(--ink-2);line-height:1.7}
.q-explain.show{display:block}
.q-explain b{color:var(--accent)}
.quiz-actions{display:flex;align-items:center;gap:14px;padding-top:22px;border-top:1px solid var(--line);flex-wrap:wrap}
.quiz-result{font-size:14px;font-weight:700;display:none}
.quiz-result.show{display:block}
.quiz-result.pass{color:#047857}
.quiz-result.fail{color:#b91c1c}
.pass-card{
  display:none;margin-top:22px;padding:26px 28px;
  background:linear-gradient(135deg,#f0fdf7,#ecfdf5);
  border:1px solid #b8ecd6;border-radius:var(--r-lg);text-align:center;
}
.pass-card.show{display:block;animation:pop .45s cubic-bezier(.2,.9,.3,1.1)}
@keyframes pop{from{opacity:0;transform:scale(.95)}to{opacity:1;transform:none}}
.pass-card .p-icon{font-size:38px;margin-bottom:10px}
.pass-card h3{font-size:19px;font-weight:800;color:#047857;margin-bottom:6px}
.pass-card p{font-size:14px;color:#0f766e;margin-bottom:18px}
.pass-actions{display:flex;gap:11px;justify-content:center;flex-wrap:wrap}
.empty{text-align:center;padding:60px 20px;color:var(--ink-3)}

.vip-badge{
  display:inline-flex;align-items:center;gap:7px;
  margin-top:14px;padding:7px 14px;border-radius:11px;
  background:linear-gradient(135deg,#fef3c7,#fde68a);
  border:1px solid #fcd34d;
  font-size:12.5px;font-weight:700;color:#92400e;
}

/* ============================================================
   排行榜页
   ============================================================ */
.lb-hero{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--shadow);padding:30px;margin-bottom:24px;
  position:relative;overflow:hidden;
}
.lb-hero::before{
  content:'';position:absolute;top:-80px;right:-80px;width:240px;height:240px;border-radius:50%;
  background:radial-gradient(circle,rgba(251,191,36,.18),transparent 68%);pointer-events:none;
}
.lb-hero h1{font-size:25px;font-weight:800;letter-spacing:-.5px;margin-bottom:6px}
.lb-hero > p{font-size:14px;color:var(--ink-3);margin-bottom:20px}

.lb-tabs{display:flex;gap:6px;margin-bottom:18px;flex-wrap:wrap}
.lb-tab{
  padding:8px 16px;border-radius:10px;
  font-size:13.5px;font-weight:700;color:var(--ink-2);
  background:#fff;border:1px solid var(--line-2);
  transition:.18s;
}
.lb-tab:hover{background:var(--bg-soft);color:var(--ink)}
.lb-tab.active{
  background:linear-gradient(135deg,var(--accent),var(--accent-2));
  color:#fff;border-color:transparent;
  box-shadow:0 8px 20px -10px rgba(99,102,241,.9);
}

.my-rank{
  display:flex;align-items:center;gap:14px;flex-wrap:wrap;
  padding:14px 18px;border-radius:14px;
  background:linear-gradient(135deg,#f5f3ff,#fdf4ff);
  border:1px solid #ddd6fe;
}
.my-rank.empty-rank{background:var(--bg-soft);border-color:var(--line)}
.my-rank.empty-rank span{font-size:13.5px;color:var(--ink-3)}
.my-rank.empty-rank a{color:var(--accent);font-weight:700}
.mr-label{font-size:12px;font-weight:700;color:#7c3aed;letter-spacing:.4px}
.mr-rank{
  font-size:24px;font-weight:900;
  background:linear-gradient(135deg,var(--accent),var(--accent-2));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.mr-stat{font-size:13px;color:#6d28d9;margin-left:auto}

.lb-list{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--shadow);overflow-x:auto;-webkit-overflow-scrolling:touch;
}
.lb-head,.lb-row{
  display:grid;
  grid-template-columns:70px 1fr 80px 80px 100px;
  align-items:center;
  padding:14px 22px;
  gap:10px;
  min-width:560px;
}
.lb-head{
  background:var(--bg-soft);
  font-size:11.5px;font-weight:800;letter-spacing:.5px;
  color:var(--ink-3);text-transform:uppercase;
  border-bottom:1px solid var(--line);
}
.lb-row{
  border-bottom:1px solid var(--line);
  font-size:14px;color:var(--ink-2);
  transition:.16s;
}
.lb-row:last-child{border-bottom:none}
.lb-row:hover{background:var(--bg-soft)}
.lb-row.me{background:linear-gradient(90deg,#f5f3ff,#fff 60%);box-shadow:inset 3px 0 0 var(--accent);font-weight:600}
.lb-col-rank{font-weight:800;font-size:15px;color:var(--ink-3)}
.medal{font-size:20px}
.lb-col-user{display:flex;align-items:center;gap:10px;min-width:0}
.avatar-sm{
  width:28px;height:28px;flex-shrink:0;border-radius:50%;
  display:grid;place-items:center;
  font-size:12px;font-weight:700;color:#fff;
  background:linear-gradient(135deg,#6366f1,#a855f7);
}
.lb-name{font-weight:600;color:var(--ink);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.lb-col-num{font-variant-numeric:tabular-nums;color:var(--ink-2)}
.lb-col-num.strong{font-weight:800;color:var(--ink);font-size:15px}
.lb-col-acc{text-align:right}
.acc-badge{
  display:inline-block;padding:3px 10px;border-radius:99px;
  background:var(--ok-soft);color:#047857;
  font-size:12px;font-weight:700;
}

/* ============================================================
   错题本
   ============================================================ */
.wb-wrap{padding:0}
.wb-hero{
  display:flex;align-items:center;gap:20px;
  background:linear-gradient(135deg,#7f1d1d,#b91c1c 55%,#ef4444);
  color:#fff;border-radius:22px;padding:28px 32px;
  margin-bottom:22px;position:relative;overflow:hidden;
}
.wb-hero::before{
  content:'';position:absolute;top:-80px;right:-80px;
  width:260px;height:260px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,255,255,.15),transparent 68%);
}
.wb-hero-left{display:flex;align-items:center;gap:18px;flex:1;position:relative;z-index:1;min-width:0}
.wb-hero-icon{font-size:46px;flex-shrink:0}
.wb-hero h1{font-size:26px;font-weight:800;letter-spacing:-.5px;margin-bottom:5px}
.wb-hero p{font-size:13.5px;opacity:.88;line-height:1.6}
.wb-hero-stat{
  position:relative;z-index:1;
  display:flex;flex-direction:column;align-items:center;
  padding:12px 22px;border-radius:14px;
  background:rgba(255,255,255,.15);border:1px solid rgba(255,255,255,.22);
  flex-shrink:0;
}
.wb-hero-stat span{font-size:11px;opacity:.8}
.wb-hero-stat b{font-size:34px;font-weight:900;line-height:1.1}

.wb-layout{display:grid;grid-template-columns:1fr;gap:22px;align-items:start}
@media(min-width:900px){
  .wb-layout{grid-template-columns:1fr 360px}
}
.wb-col{display:flex;flex-direction:column;gap:16px}

.wb-card{
  background:#fff;border:1px solid #ececf1;border-radius:16px;
  padding:20px 22px;box-shadow:var(--shadow-sm);
}
.wb-card-head{display:flex;align-items:center;gap:10px;margin-bottom:12px}
.wb-tag{font-size:11px;font-weight:700;padding:3px 10px;border-radius:99px;background:#eef0ff;color:#6366f1}
.wb-wrong-count{font-size:11.5px;font-weight:700;padding:3px 10px;border-radius:99px;background:#fdecec;color:#b91c1c}
.wb-remove{
  margin-left:auto;width:28px;height:28px;border-radius:50%;
  border:none;background:#f5f5f8;color:#8a8a99;font-size:16px;cursor:pointer;
  display:grid;place-items:center;transition:.18s;
}
.wb-remove:hover{background:#fdecec;color:#b91c1c}
.wb-prompt{font-size:15px;font-weight:700;line-height:1.6;margin-bottom:14px}
.wb-options{display:grid;gap:8px}
.wb-opt{
  display:flex;align-items:center;gap:12px;
  padding:12px 16px;
  background:#fff;border:1.5px solid #e2e2ea;border-radius:11px;
  font-size:14px;color:#5a5a6a;text-align:left;
  cursor:pointer;transition:.18s;font-family:inherit;
}
.wb-opt:hover:not(:disabled){border-color:#a78bfa;background:#fafaff}
.wb-opt:disabled{cursor:default;opacity:.85}
.wb-opt .k{width:24px;height:24px;border-radius:7px;flex-shrink:0;display:grid;place-items:center;background:#f0f0f6;color:#6366f1;font-size:12px;font-weight:800}
.wb-opt.correct{border-color:#10b981;background:#ecfdf5;color:#047857;font-weight:700}
.wb-opt.correct .k{background:#10b981;color:#fff}
.wb-opt.wrong{border-color:#ef4444;background:#fef2f2;color:#b91c1c;font-weight:700}
.wb-opt.wrong .k{background:#ef4444;color:#fff}
.wb-result{margin-top:12px;padding:10px 14px;border-radius:10px;background:#f5f5f8;font-size:13px}

.wb-empty{background:#fff;border:1px solid #ececf1;border-radius:18px;padding:60px 30px;text-align:center}
.wb-empty h3{font-size:19px;font-weight:800;margin-bottom:8px}
.wb-empty p{font-size:14px;color:#8a8a99}
.wb-empty-text{font-size:13.5px;color:#8a8a99;padding:14px 0;text-align:center}

.wb-champion{
  background:linear-gradient(135deg,#fef3c7,#fde68a);
  border:1px solid #fcd34d;border-radius:16px;
  padding:20px 22px;text-align:center;
}
.wb-champion-label{font-size:12px;font-weight:800;color:#92400e;letter-spacing:.5px}
.wb-champion-name{font-size:26px;font-weight:900;color:#78350f;margin:8px 0 4px}
.wb-champion-sub{font-size:12.5px;color:#a16207}

.wb-h3{font-size:15px;font-weight:800;margin-bottom:12px}
.wb-rank{display:flex;flex-direction:column;gap:6px}
.wb-rank-row{
  display:flex;align-items:center;gap:10px;
  padding:9px 12px;border-radius:10px;
  background:#fafafd;border:1px solid #ececf1;
  font-size:13px;
}
.wb-rank-row.me{background:linear-gradient(90deg,#fef2f2,#fff 60%);border-color:#fecaca;box-shadow:0 0 0 2px rgba(239,68,68,.12)}
.wb-rank-no{width:30px;text-align:center;font-weight:800;color:#8a8a99;flex-shrink:0}
.wb-rank-name{flex:1;font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.wb-rank-name em{font-style:normal;font-size:10px;background:#ef4444;color:#fff;padding:1px 6px;border-radius:99px;margin-left:4px}
.wb-rank-num{font-weight:800;color:#ef4444;font-variant-numeric:tabular-nums}

/* ============================================================
   每日 10 题
   ============================================================ */
.daily-wrap{padding:0}
.daily-hero{
  display:flex;align-items:center;gap:18px;
  background:linear-gradient(135deg,#1e3a8a,#2563eb 55%,#06b6d4);
  color:#fff;border-radius:22px;padding:26px 30px;
  margin-bottom:22px;position:relative;overflow:hidden;
}
.daily-hero::before{
  content:'';position:absolute;top:-80px;right:-80px;
  width:260px;height:260px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,255,255,.15),transparent 68%);
}
.daily-hero-icon{font-size:42px;position:relative;z-index:1;flex-shrink:0}
.daily-hero > div:nth-child(2){flex:1;position:relative;z-index:1;min-width:0}
.daily-hero h1{font-size:24px;font-weight:800;letter-spacing:-.4px;margin-bottom:5px}
.daily-hero p{font-size:13.5px;opacity:.88}
.daily-done-badge{
  position:relative;z-index:1;
  display:flex;flex-direction:column;align-items:center;
  padding:12px 22px;border-radius:14px;
  background:rgba(255,255,255,.15);border:1px solid rgba(255,255,255,.22);
  flex-shrink:0;
}
.daily-done-badge span{font-size:11px;opacity:.85}
.daily-done-badge b{font-size:24px;font-weight:900}

.daily-complete{background:#fff;border:1px solid #ececf1;border-radius:20px;padding:60px 30px;text-align:center}
.daily-complete-icon{font-size:52px;margin-bottom:16px}
.daily-complete h2{font-size:20px;font-weight:800;margin-bottom:8px}
.daily-complete p{font-size:14px;color:#8a8a99;margin-bottom:20px}
.daily-complete-actions{display:flex;gap:10px;justify-content:center;flex-wrap:wrap}

.daily-list{display:grid;gap:16px}
.daily-item{background:#fff;border:1px solid #ececf1;border-radius:16px;padding:20px 22px}
.daily-prompt{display:flex;gap:10px;font-size:15px;font-weight:700;line-height:1.6;margin-bottom:8px}
.daily-num{flex-shrink:0;width:24px;height:24px;border-radius:7px;display:grid;place-items:center;font-size:12px;font-weight:800;background:#dbeafe;color:#2563eb;margin-top:2px}
.daily-lesson{font-size:12px;color:#8a8a99;margin-bottom:14px;padding-left:34px}
.daily-options{display:grid;gap:8px}
.daily-opt{
  display:flex;align-items:center;gap:12px;
  padding:12px 16px;
  background:#fff;border:1.5px solid #e2e2ea;border-radius:11px;
  font-size:14px;color:#5a5a6a;cursor:pointer;transition:.18s;user-select:none;
}
.daily-opt:hover{border-color:#60a5fa;background:#f0f9ff}
.daily-opt .mark{width:20px;height:20px;border-radius:50%;border:1.5px solid #e2e2ea;display:grid;place-items:center;flex-shrink:0}
.daily-opt.selected{border-color:#2563eb;background:#dbeafe;color:#1e40af;font-weight:600}
.daily-opt.selected .mark{border-color:#2563eb;background:#2563eb}
.daily-opt.disabled{pointer-events:none;opacity:.85}
.daily-opt.correct{border-color:#10b981;background:#ecfdf5;color:#047857;font-weight:700}
.daily-opt.correct .mark{border-color:#10b981;background:#10b981}
.daily-opt.wrong{border-color:#ef4444;background:#fef2f2;color:#b91c1c;font-weight:700}
.daily-opt.wrong .mark{border-color:#ef4444;background:#ef4444}
.daily-explain{display:none;margin-top:12px;padding:11px 15px;background:#f5f5f8;border-radius:10px;font-size:13px;color:#5a5a6a;line-height:1.7}
.daily-explain.show{display:block}
.daily-explain b{color:#2563eb}
.daily-actions{display:flex;align-items:center;gap:14px;padding:22px 0 0;margin-top:8px;flex-wrap:wrap}
.daily-result{font-size:14px;font-weight:700;display:none;color:#2563eb}
.daily-result.show{display:block}

/* ============================================================
   学习目标
   ============================================================ */
.goals-wrap{padding:0}
.goals-hero{text-align:center;padding:40px 20px 30px}
.goals-hero-icon{font-size:56px;margin-bottom:14px}
.goals-hero h1{font-size:28px;font-weight:800;letter-spacing:-.5px;margin-bottom:10px}
.goals-hero p{font-size:15px;color:#8a8a99;max-width:520px;margin:0 auto;line-height:1.7}

.goals-grid{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(240px,1fr));
  gap:16px;margin-bottom:24px;
}
.goal-card{
  position:relative;
  background:#fff;border:2px solid #ececf1;
  border-radius:18px;padding:24px 22px;
  text-align:left;cursor:pointer;transition:.25s;font-family:inherit;
}
.goal-card:hover{border-color:#a78bfa;transform:translateY(-3px);box-shadow:0 20px 40px -20px rgba(99,102,241,.4)}
.goal-card.active{border-color:#6366f1;background:linear-gradient(160deg,#f5f3ff,#fff);box-shadow:0 0 0 4px rgba(99,102,241,.12)}
.goal-icon{font-size:34px;margin-bottom:12px}
.goal-title{font-size:18px;font-weight:800;margin-bottom:6px;letter-spacing:-.2px}
.goal-desc{font-size:13.5px;color:#5a5a6a;line-height:1.6;margin-bottom:16px}
.goal-outcome{padding:12px 14px;background:#fafafd;border-radius:10px;border:1px dashed #e2e2ea}
.goal-outcome-label{display:block;font-size:10.5px;font-weight:800;letter-spacing:.5px;color:#8a8a99;margin-bottom:4px}
.goal-outcome-text{font-size:12.5px;color:#5a5a6a;line-height:1.6}
.goal-current{position:absolute;top:14px;right:14px;font-size:10.5px;font-weight:800;padding:3px 10px;border-radius:99px;background:#10b981;color:#fff}
.goals-tip{
  text-align:center;padding:18px 22px;border-radius:14px;
  background:linear-gradient(135deg,#f5f3ff,#fdf4ff);
  border:1px solid #ddd6fe;
  font-size:13.5px;color:#6d28d9;line-height:1.7;
}

/* ============================================================
   每日一签弹窗
   ============================================================ */
.daily-pop{
  position:fixed;inset:0;z-index:999;
  display:none;align-items:center;justify-content:center;
  padding:22px;opacity:0;transition:opacity .3s ease;
}
.daily-pop.show{opacity:1}
.dp-backdrop{position:absolute;inset:0;background:rgba(16,16,32,.55);backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px)}
.dp-wrap{position:relative;width:100%;max-width:380px;height:480px;perspective:1200px}
.dp-inner{position:relative;width:100%;height:100%;transform-style:preserve-3d;transition:transform .7s cubic-bezier(.4,.2,.2,1)}
.dp-inner.flipped{transform:rotateY(180deg)}
.dp-front,.dp-back{position:absolute;inset:0;backface-visibility:hidden;-webkit-backface-visibility:hidden;border-radius:24px;overflow:hidden}
.dp-front{
  background:linear-gradient(160deg,#1e1b4b,#4c1d95 45%,#7c3aed);
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  color:#fff;cursor:pointer;padding:38px 30px;
  box-shadow:0 30px 70px -25px rgba(76,29,149,.9);
}
.dp-front::before{content:'';position:absolute;top:-100px;right:-100px;width:280px;height:280px;border-radius:50%;background:radial-gradient(circle,rgba(255,255,255,.18),transparent 68%);pointer-events:none}
.dp-front::after{content:'';position:absolute;bottom:-120px;left:-120px;width:300px;height:300px;border-radius:50%;background:radial-gradient(circle,rgba(236,72,153,.32),transparent 68%);pointer-events:none}
.dp-star{position:absolute;color:rgba(255,255,255,.6);font-size:14px;pointer-events:none;animation:starTwinkle 2.4s ease-in-out infinite}
.dp-star:nth-child(1){top:14%;left:16%;animation-delay:0s}
.dp-star:nth-child(2){top:22%;right:20%;animation-delay:.6s;font-size:10px}
.dp-star:nth-child(3){bottom:26%;left:22%;animation-delay:1.2s;font-size:12px}
.dp-star:nth-child(4){bottom:18%;right:16%;animation-delay:1.8s}
@keyframes starTwinkle{0%,100%{opacity:.3;transform:scale(.9)}50%{opacity:1;transform:scale(1.2)}}
.dp-cover-icon{
  position:relative;z-index:1;
  width:96px;height:96px;border-radius:32px;
  display:grid;place-items:center;font-size:44px;
  background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.28);
  margin-bottom:24px;animation:coverPulse 3s ease-in-out infinite;
}
@keyframes coverPulse{
  0%,100%{transform:translateY(0) scale(1);box-shadow:0 0 0 0 rgba(255,255,255,.3)}
  50%{transform:translateY(-4px) scale(1.03);box-shadow:0 0 0 16px rgba(255,255,255,0)}
}
.dp-cover-title{position:relative;z-index:1;font-size:22px;font-weight:800;letter-spacing:-.3px;margin-bottom:8px}
.dp-cover-sub{position:relative;z-index:1;font-size:13.5px;opacity:.8;margin-bottom:32px}
.dp-flip-hint{
  position:relative;z-index:1;
  display:inline-flex;align-items:center;gap:8px;
  padding:11px 24px;border-radius:99px;
  background:rgba(255,255,255,.18);border:1px solid rgba(255,255,255,.32);
  font-size:13.5px;font-weight:700;letter-spacing:.3px;
  animation:hintBob 1.8s ease-in-out infinite;
}
.dp-flip-hint::before{content:'👆';font-size:15px}
@keyframes hintBob{0%,100%{transform:translateY(0)}50%{transform:translateY(-3px)}}
.dp-back{
  background:#fff;transform:rotateY(180deg);
  display:flex;flex-direction:column;padding:32px 28px 26px;
  box-shadow:0 30px 70px -25px rgba(16,16,32,.45);
}
.dp-close{
  position:absolute;top:14px;right:14px;
  width:34px;height:34px;border-radius:50%;
  border:none;background:#f5f5f8;color:#5a5a6a;
  font-size:20px;line-height:1;cursor:pointer;
  display:grid;place-items:center;transition:.18s;z-index:5;
}
.dp-close:hover{background:#ececf1;color:#16161a}
.dp-icon-box{width:64px;height:64px;border-radius:20px;display:grid;place-items:center;font-size:30px;margin-bottom:18px;border:1px solid}
.dp-tag{display:inline-block;align-self:flex-start;padding:4px 12px;border-radius:99px;font-size:11.5px;font-weight:800;letter-spacing:.4px;margin-bottom:12px}
.dp-title{font-size:22px;font-weight:800;color:var(--ink);letter-spacing:-.4px;line-height:1.35;margin-bottom:12px}
.dp-text{flex:1;font-size:14px;line-height:1.8;color:var(--ink-2)}
.dp-actions{
  display:flex;gap:10px;margin-top:20px;
  opacity:0;transform:translateY(8px);
  transition:opacity .4s .1s, transform .4s .1s;
}
.dp-actions.show{opacity:1;transform:translateY(0)}
.dp-actions .btn{flex:1;padding:13px 20px;font-size:14px}

/* ============================================================
   响应式：PC → 平板 → 手机
   ============================================================ */

/* 大屏优化 */
@media(min-width:1200px){
  .page{padding:38px 26px 70px}
}

/* 中等屏幕 */
@media(max-width:1000px){
  .topbar-inner{padding:0 18px;gap:14px}
  .nav-link{padding:7px 10px;font-size:13px}
  .page-pk,.page-wb,.page-goals{max-width:100%}
}

/* 平板：顶栏换行 */
@media(max-width:820px){
  .topbar-inner{
    flex-wrap:wrap;
    padding:10px 16px 0;
    height:auto;
    gap:10px;
  }
  .logo{order:1}
  .userbox{order:2;margin-left:auto}
  .topnav{
    order:3;
    width:100%;
    overflow-x:auto;
    overflow-y:hidden;
    -webkit-overflow-scrolling:touch;
    padding:6px 0 10px;
    margin:0 -16px;
    padding-left:16px;
    padding-right:16px;
    scrollbar-width:none;
    gap:2px;
  }
  .topnav::-webkit-scrollbar{display:none}
  .nav-link{padding:6px 11px;font-size:13px;flex-shrink:0}

  .dash-hero{padding:24px 22px}
  .lesson-head{padding:22px 22px}
  .content-card{padding:26px 22px}
  .quiz-card{padding:24px 22px}

  .wb-hero{padding:24px 22px}
  .daily-hero{padding:22px 22px}

  .lb-head,.lb-row{padding:12px 16px}
}

/* 手机 */
@media(max-width:600px){
  .page{padding:22px 14px 48px}
  .page-auth{padding:24px 14px}

  .uname{display:none}
  .hb-bar{display:none}
  .heart-badge{padding:6px 10px}
  .btn-ghost{padding:6px 11px;font-size:12.5px}

  .dash-hero{padding:22px 18px;border-radius:18px}
  .dash-hero h1{font-size:21px}
  .dash-hero p{font-size:13px}
  .progress-label{font-size:12.5px}
  .dh-hint{display:none}

  .dash-goal{flex-wrap:wrap;padding:14px 16px}
  .dash-goal .btn{width:100%;margin-top:4px}

  .pk-alert{flex-wrap:wrap;padding:16px 18px}
  .pk-alert .btn{width:100%}
  .pk-alert-item{font-size:12px}

  .checkin-card{padding:18px 16px}
  .checkin-grid{grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:10px}
  .checkin-item{padding:12px 12px 10px}
  .ci-avatar{width:34px;height:34px;font-size:14px}
  .ci-name{font-size:12.5px;margin-bottom:8px}
  .ci-stat b{font-size:14px}

  .module-head h2{font-size:17px}
  .module-head p{font-size:12.5px}
  .lesson-card{padding:14px 14px;gap:12px}
  .lesson-index{width:32px;height:32px;font-size:13px}
  .lesson-body h3{font-size:14px}
  .lesson-body p{font-size:12.5px}

  .lesson-head{padding:20px 18px;border-radius:18px}
  .lesson-head h1{font-size:21px}
  .content-card{padding:22px 18px;border-radius:18px}
  .blk-h{font-size:15.5px}
  .blk-p{font-size:14.5px}
  .blk-list li{font-size:14px}
  .blk-tip{padding:13px 15px;font-size:13.5px}
  .quiz-card{padding:20px 18px}
  .quiz-head h2{font-size:17px}
  .q-prompt{font-size:14px}
  .opt{padding:12px 14px;font-size:13.5px}

  .rhythm-cta{flex-wrap:wrap;padding:18px 20px}
  .rhythm-cta .btn{width:100%}

  .auth-card{padding:30px 22px 24px;border-radius:20px}
  .auth-brand h1{font-size:20px}

  /* 排行榜 */
  .lb-hero{padding:22px 18px;border-radius:18px}
  .lb-hero h1{font-size:21px}
  .lb-tab{padding:7px 14px;font-size:13px}
  .mr-stat{margin-left:0;width:100%}
  .lb-head,.lb-row{min-width:0;padding:11px 14px;gap:6px;font-size:13px;grid-template-columns:44px 1fr 60px 80px}
  .lb-head .lb-col-acc,.lb-row .lb-col-acc{display:none}

  /* 错题本 */
  .wb-hero{flex-wrap:wrap;padding:20px 18px;border-radius:18px;gap:14px}
  .wb-hero-icon{font-size:36px}
  .wb-hero h1{font-size:20px}
  .wb-hero-stat{width:100%;padding:10px 18px}
  .wb-hero-stat b{font-size:26px}
  .wb-card{padding:16px 16px;border-radius:14px}
  .wb-prompt{font-size:14px}
  .wb-opt{padding:11px 13px;font-size:13.5px}

  /* 每日 10 题 */
  .daily-hero{padding:20px 18px;border-radius:18px;flex-wrap:wrap;gap:12px}
  .daily-hero-icon{font-size:34px}
  .daily-hero h1{font-size:20px}
  .daily-hero p{font-size:12.5px}
  .daily-done-badge{width:100%}
  .daily-item{padding:16px 16px;border-radius:14px}
  .daily-prompt{font-size:14px}
  .daily-opt{font-size:13.5px;padding:11px 13px}

  /* 学习目标 */
  .goals-hero{padding:30px 16px 24px}
  .goals-hero-icon{font-size:46px}
  .goals-hero h1{font-size:22px}
  .goals-hero p{font-size:13.5px}
  .goals-grid{grid-template-columns:1fr;gap:12px}
  .goal-card{padding:20px 18px}

  /* 每日一签弹窗 */
  .daily-pop{padding:14px}
  .dp-wrap{max-width:340px;height:440px}
  .dp-cover-icon{width:80px;height:80px;font-size:36px;border-radius:26px}
  .dp-cover-title{font-size:19px}
  .dp-cover-sub{font-size:12.5px;margin-bottom:26px}
  .dp-back{padding:26px 22px 22px}
  .dp-icon-box{width:56px;height:56px;font-size:26px;border-radius:17px}
  .dp-title{font-size:19px}
  .dp-text{font-size:13.5px}
}

/* 小屏手机 */
@media(max-width:380px){
  .page{padding:18px 12px 40px}
  .logo-text{font-size:15px}
  .logo-mark{width:28px;height:28px;font-size:14px}
  .avatar{width:28px;height:28px;font-size:12px}
  .nav-link{padding:6px 9px;font-size:12.5px}

  .dash-hero{padding:20px 16px}
  .dash-hero h1{font-size:19px}
  .dh-value{font-size:18px}

  .checkin-grid{grid-template-columns:1fr 1fr}
  .ci-avatar{width:30px;height:30px;font-size:13px}

  .daily-opt{padding:10px 12px}
  .wb-opt{padding:10px 12px}

  .lb-head,.lb-row{padding:10px 12px;font-size:12.5px}
}

/* ============================================================
   每日 10 题 · PC 全屏
   ============================================================ */
.page-daily {
  max-width: 100% !important;
  padding: 30px 32px 60px !important;
}

/* PC 端两列布局 */
@media (min-width: 1100px) {
  .daily-list {
    grid-template-columns: 1fr 1fr !important;
    gap: 18px !important;
    align-items: start;
  }
  .daily-item {
    padding: 22px 24px !important;
  }
  .daily-actions {
    grid-column: 1 / -1;
    max-width: 900px;
    margin: 10px auto 0;
    justify-content: center;
    padding-top: 30px;
  }
}

/* 中等屏幕 */
@media (min-width: 720px) and (max-width: 1099px) {
  .daily-list {
    grid-template-columns: 1fr !important;
    max-width: 820px;
    margin: 0 auto;
  }
  .daily-actions {
    max-width: 820px;
    margin: 0 auto;
    justify-content: center;
  }
}

/* ============================================================
   错题本 · PC 全屏（顺带一起改）
   ============================================================ */
.page-wb {
  max-width: 100% !important;
  padding: 30px 32px 60px !important;
}
@media (min-width: 1200px) {
  .wb-layout {
    grid-template-columns: 1fr 400px !important;
  }
}

/* ============================================================
   学习目标 · PC 全屏（顺带一起改）
   ============================================================ */
.page-goals {
  max-width: 100% !important;
  padding: 30px 32px 60px !important;
}
@media (min-width: 1200px) {
  .goals-grid {
    grid-template-columns: repeat(4, 1fr) !important;
    gap: 20px;
  }
}
@media (min-width: 900px) and (max-width: 1199px) {
  .goals-grid {
    grid-template-columns: repeat(2, 1fr) !important;
  }
}

/* ============================================================
   擂台 · PC 全屏（顺带一起改）
   ============================================================ */
.page-pk {
  max-width: 100% !important;
  padding: 30px 32px 60px !important;
}
@media (min-width: 1200px) {
  .pk-layout {
    grid-template-columns: 1fr 420px !important;
  }
}

/* ============================================================
   学习路径 / 排行榜 · PC 也放宽
   ============================================================ */
@media (min-width: 1200px) {
  .page-dash,
  .page-lb {
    max-width: 1280px !important;
  }
}

/* ============================================================
   手机端保持紧凑
   ============================================================ */
@media (max-width: 600px) {
  .page-daily,
  .page-wb,
  .page-goals,
  .page-pk {
    padding: 22px 14px 48px !important;
  }
  .daily-list {
    grid-template-columns: 1fr !important;
  }
}

/* ============================================================
   个人主页
   ============================================================ */
.page-me { max-width: 1200px; }
.me-wrap { padding: 0; }

/* Hero */
.me-hero {
  position: relative;
  background: linear-gradient(135deg, #1e1b4b, #4c1d95 55%, #7c3aed);
  border-radius: 22px;
  padding: 32px 34px;
  margin-bottom: 22px;
  color: #fff;
  overflow: hidden;
}
.me-hero-bg {
  position: absolute;
  top: -100px; right: -100px;
  width: 320px; height: 320px; border-radius: 50%;
  background: radial-gradient(circle, rgba(236,72,153,.4), transparent 68%);
  pointer-events: none;
}
.me-hero-content {
  position: relative; z-index: 1;
  display: flex; align-items: center; gap: 22px;
  flex-wrap: wrap;
}
.me-avatar {
  width: 92px; height: 92px; border-radius: 50%;
  display: grid; place-items: center;
  font-size: 38px; font-weight: 900; color: #fff;
  background: linear-gradient(135deg, #6366f1, #ec4899);
  box-shadow: 0 16px 40px -12px rgba(139,92,246,.9), 0 0 0 3px rgba(255,255,255,.14) inset;
  flex-shrink: 0;
}
.me-hero-info { flex: 1; min-width: 240px; }
.me-hero-name {
  font-size: 26px; font-weight: 800; letter-spacing: -.5px;
  display: flex; align-items: center; gap: 10px;
  margin-bottom: 8px;
}
.me-self {
  font-style: normal; font-size: 12px; font-weight: 800;
  padding: 3px 10px; border-radius: 99px;
  background: rgba(255,255,255,.22);
}
.me-hero-meta {
  display: flex; align-items: center; gap: 8px;
  font-size: 13px; opacity: .88;
  margin-bottom: 14px; flex-wrap: wrap;
}
.me-dot {
  width: 4px; height: 4px; border-radius: 50%;
  background: rgba(255,255,255,.5);
}
.me-xp-bar {
  height: 8px; border-radius: 99px;
  background: rgba(255,255,255,.18);
  overflow: hidden;
  margin-bottom: 6px;
  max-width: 500px;
}
.me-xp-fill {
  height: 100%; border-radius: 99px;
  background: linear-gradient(90deg, #a5b4fc, #f0abfc);
  transition: width .8s;
}
.me-xp-hint {
  font-size: 11.5px; opacity: .75;
}
.me-edit-btn {
  padding: 11px 20px; border-radius: 12px;
  background: rgba(255,255,255,.18);
  border: 1px solid rgba(255,255,255,.28);
  color: #fff; font-weight: 700; font-size: 13.5px;
  text-decoration: none;
  transition: .2s;
  flex-shrink: 0;
}
.me-edit-btn:hover { background: rgba(255,255,255,.28); transform: translateY(-1px); }

/* 数据概览 */
.me-stats {
  display: grid; gap: 12px;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  margin-bottom: 22px;
}
.me-stat {
  background: #fff; border: 1px solid #ececf1;
  border-radius: 16px; padding: 18px 16px;
  text-align: center;
  transition: .2s;
}
.me-stat:hover { transform: translateY(-2px); box-shadow: 0 12px 28px -14px rgba(16,16,32,.2); }
.me-stat-icon { font-size: 22px; margin-bottom: 6px; }
.me-stat-value {
  font-size: 22px; font-weight: 900;
  color: var(--ink);
  letter-spacing: -.5px;
  font-variant-numeric: tabular-nums;
  margin-bottom: 4px;
  background: linear-gradient(135deg, #6366f1, #a855f7);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.me-stat-label { font-size: 12px; color: var(--ink-3); }

/* 两列布局 */
.me-layout {
  display: grid; grid-template-columns: 1fr;
  gap: 20px;
  align-items: start;
}
@media (min-width: 900px) {
  .me-layout { grid-template-columns: 1fr 380px; }
}
.me-col { display: flex; flex-direction: column; gap: 18px; }

.me-card {
  background: #fff; border: 1px solid #ececf1;
  border-radius: 18px;
  padding: 22px 24px;
}
.me-h2 {
  font-size: 15.5px; font-weight: 800; letter-spacing: -.2px;
  margin-bottom: 16px;
  display: flex; align-items: baseline; gap: 8px;
}
.me-muted { color: var(--ink-3); font-size: 12.5px; font-weight: 500; }
.me-empty { color: var(--ink-3); font-size: 13.5px; padding: 12px 0; }

/* 热力图 */
.me-heatmap {
  display: grid;
  grid-template-columns: repeat(15, 1fr);
  gap: 4px;
  margin-bottom: 12px;
}
@media (min-width: 500px) {
  .me-heatmap { grid-template-columns: repeat(15, 1fr); }
}
.me-heat-cell {
  aspect-ratio: 1;
  border-radius: 4px;
  background: #f0f0f6;
}
.me-heat-cell.level-0 { background: #f0f0f6; }
.me-heat-cell.level-1 { background: #c7d2fe; }
.me-heat-cell.level-2 { background: #818cf8; }
.me-heat-cell.level-3 { background: #6366f1; }
.me-heat-cell.level-4 { background: #4f46e5; }

.me-heatmap-legend {
  display: flex; align-items: center; gap: 4px;
  justify-content: flex-end;
}
.me-heatmap-legend .me-heat-cell {
  width: 12px; height: 12px; aspect-ratio: auto;
}

/* 模块进度 */
.me-mod-row {
  display: flex; align-items: center; gap: 14px;
  padding: 12px 0;
  border-bottom: 1px dashed #ececf1;
}
.me-mod-row:last-child { border-bottom: none; padding-bottom: 0; }
.me-mod-icon {
  width: 40px; height: 40px; border-radius: 12px;
  display: grid; place-items: center;
  font-size: 19px; flex-shrink: 0;
}
.me-mod-info { flex: 1; min-width: 0; }
.me-mod-title {
  font-size: 13.5px; font-weight: 700;
  margin-bottom: 6px;
}
.me-mod-bar {
  height: 6px; border-radius: 99px;
  background: #f0f0f6; overflow: hidden;
}
.me-mod-fill {
  height: 100%; border-radius: 99px;
  transition: width .8s;
}
.me-mod-num {
  font-size: 12.5px; font-weight: 700;
  color: var(--ink-3);
  font-variant-numeric: tabular-nums;
  flex-shrink: 0;
}

/* 动态 */
.me-feed { display: flex; flex-direction: column; }
.me-feed-item {
  display: flex; align-items: flex-start; gap: 12px;
  padding: 11px 0;
  border-bottom: 1px dashed #ececf1;
}
.me-feed-item:last-child { border-bottom: none; padding-bottom: 0; }
.me-feed-icon {
  width: 24px; height: 24px; border-radius: 50%;
  display: grid; place-items: center;
  font-size: 12px; font-weight: 800;
  flex-shrink: 0;
  margin-top: 1px;
}
.me-feed-icon.ok { background: #d1fae5; color: #047857; }
.me-feed-icon.no { background: #fee2e2; color: #b91c1c; }
.me-feed-body { flex: 1; min-width: 0; }
.me-feed-title {
  font-size: 13.5px; font-weight: 600;
  color: var(--ink); line-height: 1.5;
  margin-bottom: 3px;
  overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}
.me-feed-sub { font-size: 11.5px; color: var(--ink-3); }

/* 排名 */
.me-rank-item {
  display: flex; align-items: center; gap: 12px;
  padding: 11px 14px;
  background: #fafafd; border-radius: 11px;
  border: 1px solid #ececf1;
  margin-bottom: 8px;
}
.me-rank-item:last-child { margin-bottom: 0; }
.me-rank-icon { font-size: 16px; }
.me-rank-label { flex: 1; font-size: 13.5px; font-weight: 600; color: var(--ink-2); }
.me-rank-value {
  font-size: 18px; font-weight: 900;
  background: linear-gradient(135deg, #6366f1, #a855f7);
  -webkit-background-clip: text; background-clip: text; color: transparent;
  font-variant-numeric: tabular-nums;
}

/* 徽章 */
.me-badges {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
  gap: 12px;
}
.me-badge {
  text-align: center;
  cursor: default;
}
.me-badge-icon {
  width: 56px; height: 56px; margin: 0 auto 6px;
  border-radius: 18px;
  display: grid; place-items: center;
  font-size: 26px;
  background: linear-gradient(135deg, #f5f3ff, #fdf4ff);
  border: 1px solid #ddd6fe;
  box-shadow: 0 6px 16px -8px rgba(139,92,246,.5);
  transition: .25s;
}
.me-badge:hover .me-badge-icon {
  transform: translateY(-3px) scale(1.05);
  box-shadow: 0 12px 24px -10px rgba(139,92,246,.7);
}
.me-badge-name {
  font-size: 11px; font-weight: 700;
  color: var(--ink-2);
  line-height: 1.3;
}

/* 底部提示 */
.me-footer-hint {
  text-align: center;
  font-size: 12.5px;
  color: var(--ink-3);
  margin-top: 24px;
}
.me-footer-hint code {
  background: #f0f0f6;
  padding: 2px 8px;
  border-radius: 6px;
  font-family: 'SF Mono', Menlo, Consolas, monospace;
  color: #6366f1;
  font-size: 11.5px;
}
.me-footer-hint a { color: #6366f1; font-weight: 700; }

/* 手机端 */
@media (max-width: 600px) {
  .me-hero { padding: 24px 20px; border-radius: 18px; }
  .me-avatar { width: 72px; height: 72px; font-size: 30px; }
  .me-hero-name { font-size: 21px; }
  .me-hero-meta { font-size: 12px; }
  .me-edit-btn { width: 100%; text-align: center; }
  .me-stats { grid-template-columns: repeat(2, 1fr); }
  .me-stat-value { font-size: 18px; }
  .me-card { padding: 18px 18px; border-radius: 14px; }
  .me-heatmap { grid-template-columns: repeat(10, 1fr); }
  .me-badges { grid-template-columns: repeat(auto-fill, minmax(70px, 1fr)); }
  .me-badge-icon { width: 48px; height: 48px; font-size: 22px; }
}

.nav-avatar-link {
  display: inline-block;
  transition: transform .18s;
  text-decoration: none;
}
.nav-avatar-link:hover {
  transform: scale(1.1);
}
/* ============================================================
   统一页面布局 · PC 全屏 + 内容居中
   ============================================================ */

/* 所有页面：全屏宽 */
.page {
  width: 100% !important;
  max-width: 100% !important;
  margin: 0 auto !important;
  padding: 32px clamp(24px, 4vw, 64px) 64px !important;
}

/* 页面内所有直接子元素：统一限宽 + 居中 */
.page > * {
  width: 100%;
  max-width: 1440px;
  margin-left: auto;
  margin-right: auto;
}

/* 学习路径 / 排行榜 / 擂台 / 个人主页 / 错题本 / 学习目标 / 每日10题：
   统一用 1440px 上限，不用单独设置 */
.page-dash,
.page-lb,
.page-pk,
.page-me,
.page-wb,
.page-goals,
.page-daily {
  max-width: 100% !important;
}

/* 课程详情：阅读页稍微窄一点，避免正文一行太长 */
.page-lesson > .lesson-head,
.page-lesson > .lesson-layout {
  max-width: 1200px;
}

/* 认证页：保持居中卡片，背景全屏 */
.page-auth {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: calc(100vh - 62px);
  padding: 60px 24px !important;
}
.page-auth > * {
  max-width: 440px;
}

/* 首页 Hero 完全铺满，不被 1440 限制 */
.page > .dash-hero,
.page > .pk-hero,
.page > .wb-hero,
.page > .daily-hero,
.page > .lb-hero {
  max-width: 1440px;
}

/* 顶栏内容也统一用 1440px 居中，但背景全屏 */
.topbar-inner {
  max-width: 1440px !important;
  padding: 0 clamp(20px, 4vw, 48px) !important;
}

/* ============================================================
   平板
   ============================================================ */
@media (max-width: 1100px) {
  .page {
    padding: 28px 32px 56px !important;
  }
}

/* ============================================================
   平板小 / 大手机
   ============================================================ */
@media (max-width: 820px) {
  .page {
    padding: 24px 20px 48px !important;
  }
  .page-auth {
    padding: 32px 20px !important;
  }
  .topbar-inner {
    padding: 10px 20px 0 !important;
  }
}

/* ============================================================
   手机
   ============================================================ */
@media (max-width: 600px) {
  .page {
    padding: 20px 16px 44px !important;
  }
  .page-auth {
    padding: 24px 16px !important;
    min-height: auto;
  }
  .topbar-inner {
    padding: 10px 16px 0 !important;
  }
}

/* ============================================================
   小手机
   ============================================================ */
@media (max-width: 380px) {
  .page {
    padding: 16px 12px 40px !important;
  }
}

/* ============================================================
   全屏后台（admin）也统一
   ============================================================ */
.admin-main {
  width: 100% !important;
  max-width: 100% !important;
  padding: 32px clamp(24px, 4vw, 64px) 64px !important;
}
.admin-main > * {
  width: 100%;
  max-width: 1440px;
  margin-left: auto;
  margin-right: auto;
}
.admin-topbar-inner {
  max-width: 1440px !important;
  padding: 0 clamp(20px, 4vw, 48px) !important;
}

@media (max-width: 820px) {
  .admin-main { padding: 24px 20px 48px !important; }
  .admin-topbar-inner { padding: 10px 20px 0 !important; }
}
@media (max-width: 600px) {
  .admin-main { padding: 18px 16px 44px !important; }
  .admin-topbar-inner { padding: 10px 16px 0 !important; }
}

/* ============================================================
   全屏对战页：保持原有全屏深色，不动
   ============================================================ */
body.pk-fullscreen .pkp-wrap {
  max-width: 900px;   /* 对战答题区域不要拉太宽 */
}

/* ============================================================
   资源下载 · 表格版
   ============================================================ */

.files-wrap { padding: 0; }

.files-hero {
  display: flex; align-items: center; gap: 20px;
  background: linear-gradient(135deg, #0f172a, #1e3a8a 55%, #2563eb);
  color: #fff; border-radius: 22px;
  padding: 28px 32px; margin-bottom: 22px;
  position: relative; overflow: hidden;
}
.files-hero::before {
  content:''; position:absolute; top:-80px; right:-80px;
  width: 260px; height: 260px; border-radius:50%;
  background: radial-gradient(circle, rgba(59,130,246,.5), transparent 68%);
  pointer-events: none;
}
.files-hero-icon { font-size: 46px; position:relative; z-index:1; flex-shrink:0; }
.files-hero > div:nth-child(2) { flex: 1; position:relative; z-index:1; min-width:0; }
.files-hero h1 { font-size: 25px; font-weight: 800; letter-spacing:-.5px; margin-bottom: 5px; }
.files-hero p  { font-size: 13.5px; opacity: .85; }
.files-count {
  position:relative; z-index:1;
  padding: 10px 20px; border-radius: 12px;
  background: rgba(255,255,255,.15);
  border: 1px solid rgba(255,255,255,.22);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  font-size: 14px; font-weight: 800;
  white-space: nowrap;
  flex-shrink: 0;
}

.files-empty {
  text-align: center;
  padding: 70px 30px;
  background: #fff; border: 1px solid #ececf1;
  border-radius: 18px;
}
.files-empty h3 { font-size: 19px; font-weight: 800; margin-bottom: 8px; }
.files-empty p { font-size: 14px; color: #8a8a99; }

/* 表格容器 */
.files-table-wrap {
  background: #fff;
  border: 1px solid #ececf1;
  border-radius: 18px;
  overflow: hidden;
  box-shadow: 0 1px 2px rgba(16,16,32,.04), 0 10px 28px -14px rgba(16,16,32,.16);
}
.files-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}
.files-table thead th {
  padding: 14px 18px;
  text-align: left;
  font-size: 11.5px;
  font-weight: 800;
  letter-spacing: .5px;
  color: var(--ink-3);
  text-transform: uppercase;
  background: var(--bg-soft);
  border-bottom: 1px solid var(--line);
  white-space: nowrap;
}
.files-table tbody td {
  padding: 16px 18px;
  border-bottom: 1px solid var(--line);
  vertical-align: middle;
  color: var(--ink-2);
}
.files-table tbody tr:last-child td {
  border-bottom: none;
}
.files-table tbody tr {
  transition: background .15s;
}
.files-table tbody tr:hover {
  background: #fafafd;
}

/* 列宽 */
.files-table .col-title  { width: 38%; }
.files-table .col-time   { width: 14%; white-space: nowrap; }
.files-table .col-size   { width: 12%; white-space: nowrap; }
.files-table .col-desc   { width: 24%; }
.files-table .col-action { width: 12%; text-align: right; white-space: nowrap; }

/* 标题单元格 */
.ft-title-cell {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}
.ft-icon {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  font-size: 20px;
  background: linear-gradient(135deg, #eff6ff, #dbeafe);
  border: 1px solid #bfdbfe;
  flex-shrink: 0;
}
.ft-title-info { min-width: 0; }
.ft-title-name {
  font-size: 14px;
  font-weight: 700;
  color: var(--ink);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  margin-bottom: 2px;
}
.ft-title-sub {
  font-size: 11.5px;
  color: var(--ink-3);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* 时间列 */
.ft-time {
  display: block;
  font-weight: 600;
  color: var(--ink-2);
  font-variant-numeric: tabular-nums;
}
.ft-time-sub {
  display: block;
  font-size: 11.5px;
  color: var(--ink-3);
  margin-top: 2px;
  font-variant-numeric: tabular-nums;
}

/* 大小列 */
.ft-size {
  display: block;
  font-weight: 700;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}
.ft-ext {
  display: inline-block;
  margin-top: 4px;
  padding: 1px 7px;
  border-radius: 5px;
  background: #f0f0f6;
  color: #5a5a6a;
  font-size: 10.5px;
  font-weight: 800;
  letter-spacing: .3px;
  text-transform: uppercase;
}

/* 备注列 */
.ft-desc {
  font-size: 13px;
  color: var(--ink-2);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.ft-desc-empty {
  color: #cbd5e1;
}

/* 下载列 */
.ft-dl-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 8px 16px;
  border-radius: 10px;
  background: linear-gradient(135deg, #6366f1, #a855f7);
  color: #fff;
  font-size: 13px;
  font-weight: 700;
  text-decoration: none;
  transition: transform .15s, box-shadow .2s;
  box-shadow: 0 6px 16px -8px rgba(99,102,241,.85);
}
.ft-dl-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 10px 22px -8px rgba(99,102,241,.95);
}
.ft-dl-btn span {
  font-size: 12px;
}
.ft-dl-count {
  font-size: 11px;
  color: var(--ink-3);
  margin-top: 5px;
  text-align: right;
  font-variant-numeric: tabular-nums;
}
.ft-nodl {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  color: #9a9aab;
  padding: 6px 12px;
  border-radius: 8px;
  background: #f5f5f8;
  border: 1px dashed #e2e2ea;
  white-space: nowrap;
}

/* ---------- 平板：隐藏备注列 ---------- */
@media (max-width: 900px) {
  .files-table .col-desc { display: none; }
  .files-table .col-title { width: 45%; }
  .files-table .col-time { width: 18%; }
  .files-table .col-size { width: 15%; }
  .files-table .col-action { width: 22%; }
}

/* ---------- 手机：改成卡片式排列 ---------- */
@media (max-width: 600px) {
  .files-hero {
    padding: 22px 20px;
    border-radius: 18px;
    flex-wrap: wrap;
    gap: 14px;
  }
  .files-hero-icon { font-size: 34px; }
  .files-hero h1 { font-size: 20px; }
  .files-hero p { font-size: 12.5px; }
  .files-count {
    width: 100%;
    text-align: center;
    font-size: 13px;
  }

  .files-table-wrap {
    border-radius: 14px;
    overflow: visible;
    background: transparent;
    border: none;
    box-shadow: none;
  }
  .files-table thead { display: none; }
  .files-table,
  .files-table tbody,
  .files-table tr,
  .files-table td { display: block; width: 100%; }

  .files-table tbody tr {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 14px;
    padding: 14px 16px;
    margin-bottom: 10px;
    position: relative;
  }
  .files-table tbody tr:hover { background: #fff; }

  .files-table tbody td {
    padding: 0;
    border: none;
    text-align: left;
    color: var(--ink-2);
  }

  .files-table .col-title {
    margin-bottom: 10px;
    padding-bottom: 12px;
    border-bottom: 1px dashed var(--line);
  }
  .files-table .col-time,
  .files-table .col-size {
    display: inline-block;
    width: auto;
    margin-right: 16px;
    margin-bottom: 10px;
  }
  .files-table .col-time .ft-time-sub,
  .files-table .col-size .ft-ext { display: none; }
  .files-table .col-time::before {
    content: '📅 ';
    font-size: 11px;
    color: var(--ink-3);
  }
  .files-table .col-size::before {
    content: '📦 ';
    font-size: 11px;
  }

  .files-table .col-desc {
    display: block;
    margin-bottom: 12px;
    font-size: 12.5px;
  }
  .files-table .col-desc .ft-desc { -webkit-line-clamp: 3; }

  .files-table .col-action {
    text-align: left;
    padding-top: 12px;
    border-top: 1px dashed var(--line);
  }
  .ft-dl-btn { width: 100%; justify-content: center; padding: 10px; }
  .ft-dl-count { text-align: center; }
  .ft-nodl { width: 100%; text-align: center; }
}

/* ============================================================
   资源页 · 跨浏览器兼容补丁
   ============================================================ */

/* 1. Grid 前缀（老 Safari / IE） */
.files-table-wrap {
  display: block;  /* 不用 grid，保留兼容性 */
}
.ft-icon,
.file-icon,
.ft-title-cell {
  display: -webkit-box;
  display: -webkit-flex;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
  -webkit-align-items: center;
  -ms-flex-align: center;
  align-items: center;
}
.ft-icon,
.file-icon {
  -webkit-box-pack: center;
  -webkit-justify-content: center;
  -ms-flex-pack: center;
  justify-content: center;
}

/* 2. place-items 兜底 */
@supports not (place-items: center) {
  .ft-icon,
  .file-icon {
    display: table-cell;
    text-align: center;
    vertical-align: middle;
  }
}

/* 3. 多行截断 · 三前缀齐全 */
.ft-desc,
.file-card-desc {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  -moz-line-clamp: 2;
  -moz-box-orient: vertical;
  box-orient: vertical;
  line-clamp: 2;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* 4. transition / transform 前缀 */
.ft-dl-btn,
.files-table tbody tr,
.file-card {
  -webkit-transition: background .15s, transform .15s, box-shadow .2s;
  transition: background .15s, transform .15s, box-shadow .2s;
}
.ft-dl-btn:hover {
  -webkit-transform: translateY(-1px);
  transform: translateY(-1px);
}

/* 5. 触摸设备：不要 hover 效果（防止"点上去就卡住"） */
@media (hover: none) {
  .files-table tbody tr:hover { background: transparent; }
  .ft-dl-btn:hover {
    -webkit-transform: none;
    transform: none;
  }
  .file-card:hover,
  .checkin-item:hover,
  .goal-card:hover,
  .pk-opp:hover,
  .pk-user:hover,
  .lesson-card:hover {
    -webkit-transform: none;
    transform: none;
  }
}

/* 6. flexbox gap 兜底 */
@supports not (gap: 10px) {
  .ft-title-cell > * + * { margin-left: 12px; }
  .ft-dl-btn > * + * { margin-left: 5px; }
  .files-hero > * + * { margin-left: 20px; }
}

/* 7. 手机表格转卡片 · 老 iOS 兜底 */
@media (max-width: 600px) {
  .files-table tbody tr {
    /* 用 flex 代替 block 在某些老 Safari 上更稳 */
    display: -webkit-box;
    display: -webkit-flex;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-orient: vertical;
    -webkit-flex-direction: column;
    -ms-flex-direction: column;
    flex-direction: column;
  }
  .files-table tbody td {
    display: block;
    width: 100%;
  }
  .files-table thead {
    display: none;
  }
}

/* 8. 高对比度模式 */
@media (prefers-contrast: high) {
  .ft-dl-btn {
    border: 2px solid #16161a;
  }
  .files-table tbody tr {
    border: 2px solid #16161a;
  }
}

/* 9. 打印模式 */
@media print {
  .files-table .col-action,
  .files-hero-icon,
  .files-count { display: none; }
  .files-table-wrap {
    box-shadow: none;
    border: 1px solid #ccc;
  }
}

/* 10. text-overflow 兜底（老 Firefox） */
.ft-title-name,
.ft-title-sub {
  -moz-text-overflow: ellipsis;
  text-overflow: ellipsis;
}

/* 11. 时间数字等宽（数字不抖动） */
.ft-time,
.ft-time-sub,
.ft-size,
.ft-dl-count {
  font-variant-numeric: tabular-nums;
  -moz-font-feature-settings: "tnum";
  -webkit-font-feature-settings: "tnum";
  font-feature-settings: "tnum";
}

/* 12. Windows 滚动条与 macOS 一致 */
.files-table-wrap {
  scrollbar-width: thin;
  scrollbar-color: #d4d4e0 transparent;
}
.files-table-wrap::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
.files-table-wrap::-webkit-scrollbar-thumb {
  background: #d4d4e0;
  border-radius: 99px;
}

/* ============================================================
   资源页 · 音频 / 图片预览
   ============================================================ */

.ft-thumb {
  width: 42px; height: 42px;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid #e2e2ea;
  background: #f5f5f8;
  cursor: pointer;
  flex-shrink: 0;
  display: -webkit-box; display: -webkit-flex; display: -ms-flexbox; display: flex;
  -webkit-box-align: center; -webkit-align-items: center; -ms-flex-align: center; align-items: center;
  -webkit-box-pack: center; -webkit-justify-content: center; -ms-flex-pack: center; justify-content: center;
  transition: transform .15s, box-shadow .2s;
}
.ft-thumb:hover { transform: scale(1.05); box-shadow: 0 4px 12px -4px rgba(99,102,241,.4); border-color: #c7d2fe; }
.ft-thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }

.ft-actions {
  display: -webkit-box; display: -webkit-flex; display: -ms-flexbox; display: flex;
  gap: 6px;
  justify-content: flex-end;
  -webkit-flex-wrap: wrap; flex-wrap: wrap;
}
@supports not (gap: 6px) {
  .ft-actions > * + * { margin-left: 6px; }
}

.ft-mini-btn {
  display: -webkit-inline-box; display: -webkit-inline-flex; display: -ms-inline-flexbox; display: inline-flex;
  -webkit-box-align: center; -webkit-align-items: center; -ms-flex-align: center; align-items: center;
  gap: 4px;
  padding: 6px 11px;
  border-radius: 8px;
  font-size: 12px; font-weight: 700;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  font-family: inherit;
  white-space: nowrap;
  transition: .15s;
  -webkit-appearance: none; appearance: none;
}
.ft-play-btn { background: linear-gradient(135deg, #10b981, #059669); color: #fff; box-shadow: 0 4px 10px -6px rgba(16,185,129,.8); }
.ft-play-btn:hover { transform: translateY(-1px); }
.ft-view-btn { background: #eff6ff; color: #2563eb; border-color: #bfdbfe; }
.ft-view-btn:hover { background: #dbeafe; }
.ft-dl-btn { background: linear-gradient(135deg, #6366f1, #a855f7); color: #fff; box-shadow: 0 4px 10px -6px rgba(99,102,241,.8); }
.ft-dl-btn:hover { transform: translateY(-1px); }

.media-lightbox, .media-player {
  position: fixed; inset: 0; z-index: 9999;
  display: -webkit-box; display: -webkit-flex; display: -ms-flexbox; display: flex;
  -webkit-box-align: center; -webkit-align-items: center; -ms-flex-align: center; align-items: center;
  -webkit-box-pack: center; -webkit-justify-content: center; -ms-flex-pack: center; justify-content: center;
  padding: 24px;
}
.media-backdrop {
  position: absolute; inset: 0;
  background: rgba(10,10,20,.88);
  -webkit-backdrop-filter: blur(8px); backdrop-filter: blur(8px);
}
.media-lb-body, .media-player-body {
  position: relative; z-index: 1;
  width: 100%; max-width: 1000px;
  text-align: center;
  -webkit-animation: mediaFadeIn .3s ease; animation: mediaFadeIn .3s ease;
}
.media-player-body {
  max-width: 440px;
  background: #fff; border-radius: 20px;
  padding: 34px 30px 28px;
  box-shadow: 0 30px 70px -25px rgba(0,0,0,.6);
}
@keyframes mediaFadeIn {
  from { opacity: 0; transform: scale(.96); }
  to   { opacity: 1; transform: scale(1); }
}
.media-lb-body img {
  max-width: 100%;
  max-height: calc(100vh - 120px);
  max-height: calc(100dvh - 120px);
  border-radius: 12px;
  box-shadow: 0 20px 60px -20px rgba(0,0,0,.7);
  display: block; margin: 0 auto;
}
.media-caption {
  color: #fff; font-size: 14px; font-weight: 600;
  margin-top: 16px; opacity: .9; word-break: break-all;
}
.media-player-body .media-caption { color: var(--ink); font-size: 15px; font-weight: 800; margin-top: 0; opacity: 1; }
.media-player-icon { font-size: 44px; margin-bottom: 12px; }
.media-player-body audio { width: 100%; outline: none; border-radius: 10px; margin-top: 16px; }
.media-close {
  position: absolute; top: -52px; right: 0;
  width: 40px; height: 40px; border-radius: 50%;
  border: none; background: rgba(255,255,255,.16); color: #fff;
  font-size: 24px; line-height: 1; cursor: pointer;
  display: -webkit-box; display: -webkit-flex; display: -ms-flexbox; display: flex;
  -webkit-box-align: center; -webkit-align-items: center; -ms-flex-align: center; align-items: center;
  -webkit-box-pack: center; -webkit-justify-content: center; -ms-flex-pack: center; justify-content: center;
  transition: .18s;
  -webkit-appearance: none; appearance: none;
}
.media-close:hover { background: rgba(255,255,255,.28); }
.media-player-body .media-close { top: 12px; right: 12px; background: #f5f5f8; color: #5a5a6a; }
.media-player-body .media-close:hover { background: #ececf1; color: #16161a; }

@media (hover: none) {
  .ft-thumb:hover, .ft-mini-btn:hover, .ft-play-btn:hover, .ft-dl-btn:hover {
    transform: none; box-shadow: none;
  }
}

@media (max-width: 600px) {
  .ft-actions { justify-content: flex-start; }
  .ft-mini-btn { padding: 8px 14px; font-size: 12.5px; }
  .media-lb-body img { max-height: calc(100vh - 160px); max-height: calc(100dvh - 160px); }
  .media-close { top: -46px; right: 8px; width: 36px; height: 36px; font-size: 20px; }
  .media-player-body { padding: 28px 20px 22px; border-radius: 16px; }
  .media-player-body .media-close { top: 8px; right: 8px; }
}

@media (prefers-reduced-motion: reduce) {
  .media-lb-body, .media-player-body { animation: none; }
}

@media print {
  .media-lightbox, .media-player { display: none !important; }
  .ft-actions .ft-mini-btn:not(.ft-dl-btn) { display: none; }
}

/* ============================================================
   资源页 · 波形播放器（追加）
   ============================================================ */
.ft-row-audio .col-title{padding-top:14px;padding-bottom:14px}
.ft-row-audio .ft-title-cell{-webkit-box-align:start;align-items:flex-start}
.ft-row-audio .ft-icon{margin-top:2px}
.ft-row-audio .ft-title-info{flex:1;min-width:0}

.ft-audio-inline{
  display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;
  -webkit-box-align:center;-webkit-align-items:center;-ms-flex-align:center;align-items:center;
  gap:10px;margin-top:10px;max-width:100%;
}

.ft-play-state{
  font-size:13px;line-height:1;
  color:#6366f1;
  flex-shrink:0;
  width:20px;
  text-align:center;
  font-weight:800;
  display:inline-block;
  transition:.15s;
}
.ft-audio-inline.playing .ft-play-state{font-size:11px;letter-spacing:1px}

.ft-wave-wrap{
  position:relative;
  flex:1;
  min-width:120px;
  height:40px;
  border-radius:8px;
  background:#fafafd;
  overflow:hidden;
  cursor:pointer;
  transition:background .15s;
}
.ft-wave-wrap:hover{background:#f0f0ff}
.ft-wave{display:block;width:100%;height:100%;cursor:pointer}

.ft-wave-loading{
  position:absolute;inset:0;
  display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;
  -webkit-box-align:center;-webkit-align-items:center;-ms-flex-align:center;align-items:center;
  -webkit-box-pack:center;-webkit-justify-content:center;-ms-flex-pack:center;justify-content:center;
  font-size:11.5px;color:#9a9aab;
  pointer-events:none;
  background:#fafafd;
  animation:wavePulse 1.4s ease-in-out infinite;
}
@keyframes wavePulse{0%,100%{opacity:.5}50%{opacity:1}}

.ft-audio-time{
  font-size:12px;color:#8a8a99;font-weight:700;
  font-variant-numeric:tabular-nums;
  flex-shrink:0;min-width:38px;text-align:right;
  letter-spacing:.3px;
}
.ft-audio-inline.playing .ft-audio-time{color:#6366f1}

@media (max-width:600px){
  .ft-audio-inline{gap:8px;margin-top:8px}
  .ft-play-state{width:16px;font-size:12px}
  .ft-wave-wrap{height:34px;min-width:80px}
  .ft-audio-time{font-size:11px;min-width:34px}
}

@media (hover:none){
  .ft-wave-wrap:hover{background:#fafafd}
}

@media (prefers-reduced-motion:reduce){
  .ft-wave-loading{animation:none}
}














/* ============================================================
   文件筛选 tabs + 分页 + 上传进度条
   ============================================================ */

/* 前台：筛选 Tabs */
.files-tabs{
  display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;
  gap:6px;margin-bottom:16px;flex-wrap:wrap;
}
.files-tab{
  display:-webkit-inline-box;display:-webkit-inline-flex;display:-ms-inline-flexbox;display:inline-flex;
  -webkit-box-align:center;-webkit-align-items:center;-ms-flex-align:center;align-items:center;
  gap:7px;
  padding:8px 16px;border-radius:10px;
  font-size:13.5px;font-weight:700;color:var(--ink-2);
  background:#fff;border:1px solid var(--line-2);
  transition:.18s;text-decoration:none;
}
.files-tab:hover{background:var(--bg-soft);color:var(--ink)}
.files-tab.active{
  background:linear-gradient(135deg,var(--accent),var(--accent-2));
  color:#fff;border-color:transparent;
  box-shadow:0 8px 20px -10px rgba(99,102,241,.9);
}
.files-tab span{
  display:inline-block;
  padding:1px 8px;border-radius:99px;
  font-size:11px;font-weight:800;
  background:rgba(255,255,255,.5);color:inherit;
}
.files-tab.active span{background:rgba(255,255,255,.25)}
.files-tab:not(.active) span{background:#f0f0f6;color:#8a8a99}

/* 前台：分页 */
.files-pager{
  display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;
  -webkit-box-align:center;-webkit-align-items:center;-ms-flex-align:center;align-items:center;
  -webkit-box-pack:center;-webkit-justify-content:center;-ms-flex-pack:center;justify-content:center;
  gap:10px;margin-top:22px;flex-wrap:wrap;
}
.fp-btn{
  padding:8px 14px;border-radius:9px;
  background:#fff;border:1px solid var(--line-2);
  font-size:13px;font-weight:700;color:var(--ink-2);
  transition:.18s;text-decoration:none;
}
.fp-btn:hover:not(.fp-disabled){background:var(--bg-soft);color:var(--ink);border-color:#d4d4e0}
.fp-btn.fp-disabled{opacity:.4;cursor:not-allowed}
.fp-numbers{display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;gap:4px;align-items:center}
.fp-num{
  display:-webkit-inline-box;display:-webkit-inline-flex;display:-ms-inline-flexbox;display:inline-flex;
  -webkit-box-align:center;-webkit-align-items:center;-ms-flex-align:center;align-items:center;
  -webkit-box-pack:center;-webkit-justify-content:center;-ms-flex-pack:center;justify-content:center;
  min-width:34px;height:34px;padding:0 10px;
  border-radius:9px;
  background:#fff;border:1px solid var(--line-2);
  font-size:13px;font-weight:700;color:var(--ink-2);
  text-decoration:none;transition:.18s;
}
.fp-num:hover{background:var(--bg-soft);color:var(--ink)}
.fp-num.active{
  background:linear-gradient(135deg,var(--accent),var(--accent-2));
  color:#fff;border-color:transparent;
  box-shadow:0 6px 14px -8px rgba(99,102,241,.9);
}
.fp-dots{color:var(--ink-3);padding:0 4px;font-weight:700}

/* 后台：上传进度条 */
.upload-progress{
  margin:16px 0;
  padding:16px 18px;
  background:linear-gradient(135deg,#f5f3ff,#fdf4ff);
  border:1px solid #ddd6fe;
  border-radius:14px;
}
.up-head{
  display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;
  -webkit-box-align:center;-webkit-align-items:center;-ms-flex-align:center;align-items:center;
  -webkit-box-pack:justify;justify-content:space-between;
  gap:12px;margin-bottom:10px;flex-wrap:wrap;
}
.up-name{
  font-size:13.5px;font-weight:700;color:#5b21b6;
  overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
  max-width:70%;
}
.up-pct{
  font-size:14px;font-weight:900;color:#7c3aed;
  font-variant-numeric:tabular-nums;
}
.up-bar{
  height:8px;border-radius:99px;
  background:rgba(139,92,246,.15);
  overflow:hidden;margin-bottom:10px;
}
.up-fill{
  height:100%;width:0;
  border-radius:99px;
  background:linear-gradient(90deg,var(--accent),var(--accent-2));
  transition:width .2s ease;
  box-shadow:0 0 12px rgba(139,92,246,.5);
}
.up-info{
  display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;
  -webkit-box-align:center;-webkit-align-items:center;-ms-flex-align:center;align-items:center;
  gap:6px;font-size:11.5px;color:#7c3aed;
  font-variant-numeric:tabular-nums;
}
.up-sep{opacity:.5}
.up-speed{margin-left:8px;font-weight:700}

/* 前台：仅预览的标记 */
.ft-nodl{
  display:inline-block;
  font-size:12px;font-weight:700;
  color:#9a9aab;
  padding:6px 12px;border-radius:8px;
  background:#f5f5f8;
  border:1px dashed #e2e2ea;
  white-space:nowrap;
}

@media (max-width:600px){
  .files-tabs{gap:4px}
  .files-tab{padding:7px 11px;font-size:12.5px}
  .files-tab span{padding:1px 6px;font-size:10.5px}
  .files-pager{gap:6px}
  .fp-btn{padding:7px 11px;font-size:12.5px}
  .fp-num{min-width:30px;height:30px;font-size:12.5px;padding:0 8px}
  .up-name{max-width:60%}
}





/* ============================================================
   网盘链接
   ============================================================ */
.ft-netdisk-tag{
  display:inline-block;
  font-size:10.5px;font-weight:800;
  padding:2px 8px;border-radius:99px;
  background:#e0f2fe;color:#0369a1;
  margin-left:6px;
  letter-spacing:.2px;
}
.ft-link-pass{
  margin-top:8px;
  display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;
  -webkit-box-align:center;-webkit-align-items:center;-ms-flex-align:center;align-items:center;
  gap:8px;
  font-size:12.5px;color:#5a5a6a;
}
.ft-link-pass b{
  font-family:'SF Mono',Menlo,Consolas,monospace;
  background:#fef3c7;color:#92400e;
  padding:2px 10px;border-radius:6px;
  font-size:13px;
  letter-spacing:.5px;
}
.ft-copy-btn{
  font-size:11.5px;font-weight:700;
  padding:3px 10px;border-radius:99px;
  background:#eef0ff;color:#6366f1;
  border:none;cursor:pointer;
  transition:.15s;
  font-family:inherit;
}
.ft-copy-btn:hover{background:#6366f1;color:#fff}
.ft-netdisk-btn{
  background:linear-gradient(135deg,#0ea5e9,#0284c7);
  color:#fff;font-size:13px;
  padding:8px 16px;border-radius:10px;
  box-shadow:0 6px 16px -8px rgba(14,165,233,.85);
}
.ft-netdisk-btn:hover{-webkit-transform:translateY(-1px);transform:translateY(-1px);box-shadow:0 10px 22px -8px rgba(14,165,233,.95)}

/* 后台 Tabs */
.admin-tabs{
  display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;
  gap:6px;margin-bottom:20px;
  border-bottom:1px solid #e8e8ef;
  padding-bottom:0;
}
.admin-tab{
  padding:10px 18px;
  font-size:13.5px;font-weight:700;
  color:#5a5a6a;
  background:transparent;
  border:none;
  border-bottom:2px solid transparent;
  cursor:pointer;
  transition:.18s;
  font-family:inherit;
  margin-bottom:-1px;
}
.admin-tab:hover{color:#16161a}
.admin-tab.active{
  color:#6366f1;
  border-bottom-color:#6366f1;
}

@media (hover:none){
  .ft-netdisk-btn:hover,.ft-copy-btn:hover{-webkit-transform:none;transform:none}
}



/* ============================================================
   网盘条目
   ============================================================ */
.ft-row-link{background:linear-gradient(90deg,#f0f9ff,transparent 40%)}
.ft-row-link:hover{background:linear-gradient(90deg,#e0f2fe,#fafafd 40%)!important}
.ft-icon-link{background:linear-gradient(135deg,#dbeafe,#bfdbfe)!important;border-color:#93c5fd!important}

.ft-netdisk-tag{
  display:inline-block;
  font-size:10.5px;font-weight:800;
  padding:2px 9px;border-radius:99px;
  background:linear-gradient(135deg,#0ea5e9,#0284c7);
  color:#fff;margin-left:8px;letter-spacing:.2px;
  vertical-align:1px;
}
.ft-link-url{
  font-size:11.5px;color:#94a3b8;
  font-family:'SF Mono',Menlo,Consolas,monospace;
  overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
  max-width:520px;margin-top:2px;
}
.ft-pass-group{display:flex;flex-direction:column;gap:6px;margin-top:10px}
.ft-pass-item{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.ft-pass-label{
  font-size:11.5px;font-weight:700;color:#0369a1;
  letter-spacing:.3px;background:#e0f2fe;
  padding:3px 9px;border-radius:6px;
}
.ft-pass-label-zip{color:#7c2d12;background:#fed7aa}
.ft-pass-code{
  font-family:'SF Mono',Menlo,Consolas,monospace;
  font-size:15px;font-weight:800;color:#92400e;
  background:linear-gradient(135deg,#fef3c7,#fde68a);
  padding:4px 14px;border-radius:8px;
  letter-spacing:2px;
  border:1px solid #fcd34d;
  box-shadow:0 1px 2px rgba(146,64,14,.08);
}
.ft-pass-code-zip{
  color:#7c2d12;
  background:linear-gradient(135deg,#ffedd5,#fed7aa);
  border-color:#fdba74;
}
.ft-pass-none{
  font-size:12px;color:#10b981;font-weight:600;
  background:#d1fae5;padding:3px 10px;border-radius:6px;
  display:inline-block;
}
.ft-copy-btn{
  font-size:11.5px;font-weight:700;
  padding:5px 12px;border-radius:8px;
  background:#fff;color:#0369a1;
  border:1px solid #bae6fd;
  cursor:pointer;transition:.15s;font-family:inherit;
  white-space:nowrap;
}
.ft-copy-btn:hover{background:#0ea5e9;color:#fff;border-color:#0ea5e9}
.ft-copy-btn.copied{background:#10b981;color:#fff;border-color:#10b981}
.ft-copy-btn-zip{color:#9a3412;border-color:#fed7aa}
.ft-copy-btn-zip:hover{background:#ea580c;border-color:#ea580c}
.ft-copy-btn-zip.copied{background:#10b981;border-color:#10b981;color:#fff}

.ft-link-btn{
  display:inline-flex;align-items:center;gap:6px;
  padding:9px 18px;border-radius:11px;
  background:linear-gradient(135deg,#0ea5e9,#0284c7);
  color:#fff;font-size:13.5px;font-weight:700;
  text-decoration:none;
  box-shadow:0 6px 16px -8px rgba(14,165,233,.85);
  transition:transform .15s,box-shadow .2s;
  white-space:nowrap;
}
.ft-link-btn:hover{transform:translateY(-1px);box-shadow:0 10px 22px -8px rgba(14,165,233,1)}
.ft-link-btn-icon{font-size:14px;line-height:1}
.ft-ext-link{background:#e0f2fe!important;color:#0369a1!important}

@media (hover:none){
  .ft-link-btn:hover{transform:none;box-shadow:0 6px 16px -8px rgba(14,165,233,.85)}
}

/* ============================================================
   修复：课程页 grid 撑破
   ============================================================ */

/* 关键：grid 里的 1fr 默认是 minmax(auto, 1fr)
   里面的表格太宽时，会把整列撑开，导致整个布局错乱
   改成 minmax(0, 1fr) 就锁死了 */
@media (min-width: 900px) {
  .lesson-layout {
    grid-template-columns: minmax(0, 1fr) 300px;
  }
}

/* 主内容区不加 min-width: 0，里面的长内容也会撑破 grid */
.lesson-main {
  min-width: 0;
}

/* 兜底：内容卡片里的宽表格滚动，不撑破父级 */
.page-lesson .content-card {
  overflow-x: hidden;
  max-width: 100%;
}

.page-lesson .blk-table {
  max-width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-lesson .blk-table table {
  min-width: 100%;
  width: 100%;
}

/* 手机端单列时也是同样问题 */
@media (max-width: 899px) {
  .lesson-layout {
    display: block;
  }
}


/* ============================================================
   匿名墙
   ============================================================ */


.wall-wrap { padding: 0; }
.wall-hero{display:flex;align-items:center;gap:18px;background:linear-gradient(135deg,#1e1b4b,#7c3aed 55%,#ec4899);color:#fff;border-radius:22px;padding:26px 30px;margin-bottom:22px;position:relative;overflow:hidden}
.wall-hero::before{content:'';position:absolute;top:-80px;right:-80px;width:260px;height:260px;border-radius:50%;background:radial-gradient(circle,rgba(255,255,255,.15),transparent 68%)}
.wall-hero-icon{font-size:42px;position:relative;z-index:1}
.wall-hero > div:nth-child(2){flex:1;position:relative;z-index:1}
.wall-hero h1{font-size:24px;font-weight:800;letter-spacing:-.4px;margin-bottom:5px}
.wall-hero p{font-size:13.5px;opacity:.88}
.wall-count{position:relative;z-index:1;padding:10px 20px;border-radius:12px;background:rgba(255,255,255,.15);border:1px solid rgba(255,255,255,.22);font-size:14px;font-weight:800;white-space:nowrap}
.wall-post-box{background:#fff;border:1px solid #ececf1;border-radius:18px;padding:20px 22px;margin-bottom:20px}
.wall-form textarea{width:100%;padding:14px 16px;font-family:inherit;font-size:14.5px;line-height:1.65;color:var(--ink);background:#fafafd;border:1px solid #e2e2ea;border-radius:12px;outline:none;resize:vertical;transition:.2s}
.wall-form textarea:focus{border-color:var(--accent);background:#fff;box-shadow:0 0 0 3.5px rgba(99,102,241,.13)}
.wall-form-actions{display:flex;align-items:center;justify-content:space-between;margin-top:12px;gap:12px}
.wall-form-actions .wall-muted{font-size:12px;color:var(--ink-3)}
.wall-form-actions .btn{padding:10px 22px;font-size:14px}
.wall-posted-tip{display:flex;align-items:center;justify-content:space-between;padding:10px 14px;margin-bottom:12px;background:#ecfdf5;border-radius:10px;font-size:13px;color:#047857;font-weight:600;flex-wrap:wrap;gap:8px}
.wall-posted-tip .wall-muted{font-size:12px;color:#10b981;font-weight:500}
.wall-empty{text-align:center;padding:60px 30px;background:#fff;border:1px solid #ececf1;border-radius:18px}
.wall-empty h3{font-size:19px;font-weight:800;margin-bottom:8px}
.wall-empty p{font-size:14px;color:#8a8a99}
.wall-list{display:flex;flex-direction:column;gap:12px}
.wall-card,.wall-my-post{background:#fff;border:1px solid #ececf1;border-radius:14px;padding:16px 18px;transition:.2s}
.wall-card:hover{border-color:#d8d8e6;box-shadow:0 6px 18px -10px rgba(16,16,32,.15)}
.wall-card.mine{background:linear-gradient(135deg,#f5f3ff,#fff 60%);border-color:#ddd6fe}
.wall-post-head{display:flex;align-items:center;gap:10px;margin-bottom:10px;flex-wrap:wrap}
.wall-anon{font-size:13px;font-weight:800;padding:3px 10px;border-radius:99px;background:linear-gradient(135deg,#6366f1,#a855f7);color:#fff}
.wall-time{font-size:11.5px;color:var(--ink-3);margin-left:auto}
.wall-owner-tag{font-size:10.5px;font-weight:800;padding:2px 8px;border-radius:99px;background:#d1fae5;color:#047857}
.wall-post-content{font-size:14.5px;line-height:1.75;color:var(--ink);margin-bottom:12px;word-break:break-word}
.wall-post-actions{display:flex;align-items:center;gap:10px}
.wall-likes{font-size:13px;color:#ef4444;font-weight:700}
.wall-like-btn{display:inline-flex;align-items:center;gap:6px;padding:6px 14px;border-radius:99px;background:#fafafd;border:1px solid #e2e2ea;font-size:13px;font-weight:700;color:var(--ink-2);cursor:pointer;font-family:inherit;transition:.18s}
.wall-like-btn:hover{background:#fef2f2;border-color:#fecaca;color:#ef4444}
.wall-like-btn.liked{background:#fef2f2;border-color:#fecaca;color:#ef4444}

/* ============================================================
   学习契约
   ============================================================ */

.contract-wrap { padding: 0; }
.contract-hero{display:flex;align-items:center;gap:20px;background:linear-gradient(135deg,#78350f,#b45309 55%,#f59e0b);color:#fff;border-radius:22px;padding:28px 32px;margin-bottom:22px;position:relative;overflow:hidden}
.contract-hero::before{content:'';position:absolute;top:-80px;right:-80px;width:260px;height:260px;border-radius:50%;background:radial-gradient(circle,rgba(255,255,255,.18),transparent 68%)}
.contract-hero-icon{font-size:46px;position:relative;z-index:1}
.contract-hero > div:nth-child(2){flex:1;position:relative;z-index:1}
.contract-hero h1{font-size:25px;font-weight:800;letter-spacing:-.5px;margin-bottom:5px}
.contract-hero p{font-size:13.5px;opacity:.9}
.contract-create{background:#fff;border:1px solid #ececf1;border-radius:18px;padding:22px 24px;margin-bottom:22px}
.contract-h2{font-size:16px;font-weight:800;margin-bottom:16px;display:flex;align-items:baseline;gap:10px}
.contract-field{margin-bottom:14px}
.contract-field label{display:block;font-size:12.5px;font-weight:700;color:var(--ink-2);margin-bottom:6px}
.contract-field input,.contract-field select{width:100%;padding:11px 13px;font-family:inherit;font-size:14px;color:var(--ink);background:#fff;border:1px solid #e2e2ea;border-radius:10px;outline:none;transition:.2s}
.contract-field input:focus,.contract-field select:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(99,102,241,.13)}
.contract-field-row{display:grid;grid-template-columns:1fr 1fr 1fr;gap:12px}
.contract-actions{display:flex;justify-content:flex-end;gap:10px}
.contract-layout{display:grid;grid-template-columns:1fr;gap:20px}
@media(min-width:900px){.contract-layout{grid-template-columns:1fr 1fr}}
.contract-col{display:flex;flex-direction:column;gap:16px}
.contract-card{background:#fff;border:1px solid #ececf1;border-radius:18px;padding:22px 24px}
.contract-empty{color:var(--ink-3);font-size:13.5px;padding:20px 0;text-align:center}
.contract-list{display:flex;flex-direction:column;gap:12px}
.contract-item{padding:14px 16px;border-radius:12px;background:#fafafd;border:1px solid #ececf1}
.contract-item.active{background:linear-gradient(135deg,#f5f3ff,#fff);border-color:#ddd6fe}
.contract-item.done{background:linear-gradient(135deg,#ecfdf5,#fff);border-color:#a7f3d0}
.contract-item.failed{background:linear-gradient(135deg,#fef2f2,#fff);border-color:#fecaca;opacity:.85}
.contract-item-head{display:flex;align-items:center;gap:10px;margin-bottom:8px;flex-wrap:wrap}
.contract-item-title{flex:1;font-size:14px;font-weight:700;color:var(--ink);min-width:0;overflow:hidden;text-overflow:ellipsis}
.contract-status{font-size:11px;font-weight:800;padding:3px 10px;border-radius:99px;white-space:nowrap}
.contract-item-meta{display:flex;align-items:center;gap:6px;font-size:12px;color:var(--ink-3);margin-bottom:10px;flex-wrap:wrap}
.contract-bar{height:6px;border-radius:99px;background:#f0f0f6;overflow:hidden}
.contract-fill{height:100%;border-radius:99px;transition:width .8s}
.pkp-bet{display:inline-flex;align-items:center;gap:8px;padding:8px 16px;border-radius:99px;background:linear-gradient(135deg,#fef3c7,#fde68a);border:1px solid #fcd34d;font-size:13.5px;font-weight:700;color:#92400e;margin:0 auto 14px}
.pkp-bet-icon{font-size:15px}
.pkp-bet b{font-size:16px;font-weight:900}

@media (max-width: 600px) {
  .wall-hero, .contract-hero { padding: 20px 18px; border-radius: 18px; flex-wrap: wrap; gap: 12px; }
  .wall-hero-icon, .contract-hero-icon { font-size: 34px; }
  .wall-hero h1, .contract-hero h1 { font-size: 20px; }
  .wall-hero p, .contract-hero p { font-size: 12.5px; }
  .wall-count { width: 100%; text-align: center; }
  .contract-field-row { grid-template-columns: 1fr; }
  .wall-card, .wall-my-post { padding: 14px 14px; }
  .wall-post-content { font-size: 14px; }
}


/* 登录记录 */
.login-logs { display: flex; flex-direction: column; gap: 6px; }
.login-log-row {
  display: flex; align-items: center; gap: 10px;
  padding: 8px 12px; border-radius: 8px;
  background: #fafafd; font-size: 12.5px;
}
.login-log-row.ok   { border-left: 3px solid #10b981; }
.login-log-row.fail { border-left: 3px solid #ef4444; }
.ll-ip { font-family: 'SF Mono', Menlo, Consolas, monospace; color: #5a5a6a; font-weight: 600; }
.ll-status { font-size: 11px; font-weight: 800; padding: 2px 8px; border-radius: 99px; }
.login-log-row.ok   .ll-status { background: #d1fae5; color: #047857; }
.login-log-row.fail .ll-status { background: #fee2e2; color: #b91c1c; }
.ll-time { margin-left: auto; color: #9a9aab; font-size: 11.5px; }


/* ============================================================
   作业区（学生视角）
   ============================================================ */
.assign-zone {
  background: linear-gradient(135deg, #ecfdf5, #f0fdf4);
  border: 1px solid #a7f3d0;
  border-radius: 22px;
  padding: 24px 26px;
  margin-bottom: 24px;
  position: relative;
  overflow: hidden;
}
.assign-zone::before {
  content: '';
  position: absolute;
  top: -60px; right: -60px;
  width: 200px; height: 200px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(16,185,129,.18), transparent 68%);
  pointer-events: none;
}

.assign-zone-head {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 18px;
  position: relative;
  z-index: 1;
}
.assign-zone-icon {
  font-size: 34px;
  width: 52px; height: 52px;
  display: grid;
  place-items: center;
  background: #fff;
  border-radius: 14px;
  border: 1px solid #a7f3d0;
  box-shadow: 0 4px 12px -6px rgba(16,185,129,.4);
}
.assign-zone-title {
  font-size: 18px;
  font-weight: 800;
  color: #065f46;
  letter-spacing: -.3px;
  margin-bottom: 2px;
}
.assign-zone-sub {
  font-size: 13px;
  color: #10b981;
}

.assign-card {
  background: #fff;
  border: 1px solid #d1fae5;
  border-radius: 16px;
  padding: 18px 20px;
  margin-bottom: 12px;
  position: relative;
  z-index: 1;
}
.assign-card.done {
  background: linear-gradient(135deg, #f0fdf4, #fff);
  border-color: #86efac;
}

.assign-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 8px;
  flex-wrap: wrap;
}
.assign-card-title {
  font-size: 15.5px;
  font-weight: 800;
  color: #065f46;
  letter-spacing: -.2px;
  flex: 1;
  min-width: 0;
}
.assign-card-time {
  font-size: 12px;
  font-weight: 800;
  color: #047857;
  padding: 4px 10px;
  border-radius: 99px;
  background: #d1fae5;
  white-space: nowrap;
}
.assign-card-time.urgent {
  color: #991b1b;
  background: #fee2e2;
  animation: urgentPulse 1.4s ease-in-out infinite;
}
@keyframes urgentPulse {
  0%,100% { opacity: 1; }
  50% { opacity: .7; }
}

.assign-card-desc {
  font-size: 13px;
  color: #5a5a6a;
  line-height: 1.7;
  margin-bottom: 14px;
  padding: 10px 14px;
  background: #f9fafb;
  border-radius: 10px;
  border-left: 3px solid #10b981;
}

.assign-card-bar {
  height: 8px;
  background: #f0f0f6;
  border-radius: 99px;
  overflow: hidden;
  margin-bottom: 8px;
}
.assign-card-fill {
  height: 100%;
  border-radius: 99px;
  background: linear-gradient(90deg, #10b981, #34d399);
  transition: width .8s;
}

.assign-card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12.5px;
  color: #6b7280;
  margin-bottom: 14px;
}
.assign-card-meta b {
  color: #047857;
  font-weight: 900;
  font-size: 15px;
  font-variant-numeric: tabular-nums;
}
.assign-card-pct {
  font-weight: 800;
  color: #10b981;
  font-variant-numeric: tabular-nums;
}

.assign-lesson-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.assign-lesson-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  border-radius: 10px;
  background: #f9fafb;
  font-size: 13.5px;
  color: #5a5a6a;
  text-decoration: none;
  transition: .18s;
  border: 1px solid transparent;
}
.assign-lesson-item.done {
  background: #ecfdf5;
  border-color: #d1fae5;
  color: #047857;
  font-weight: 700;
}
.assign-lesson-item:not(.done):hover {
  background: #f0fdf4;
  border-color: #86efac;
  transform: translateX(3px);
}
.ali-check {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 11px;
  font-weight: 900;
  flex-shrink: 0;
  background: #e5e7eb;
  color: #9ca3af;
}
.assign-lesson-item.done .ali-check {
  background: #10b981;
  color: #fff;
}
.ali-title {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.ali-go {
  font-size: 12px;
  font-weight: 800;
  color: #10b981;
  flex-shrink: 0;
}

/* ============================================================
   作业管理（后台）
   ============================================================ */
.assign-picker {
  max-height: 480px;
  overflow-y: auto;
  padding: 12px;
  background: #fafafd;
  border: 1px solid #e2e2ea;
  border-radius: 12px;
}
.assign-module {
  margin-bottom: 14px;
  padding: 12px 14px;
  background: #fff;
  border: 1px solid #ececf1;
  border-radius: 10px;
}
.assign-module:last-child { margin-bottom: 0; }
.assign-module-head {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}
.assign-module-icon {
  width: 32px; height: 32px;
  display: grid; place-items: center;
  border-radius: 9px;
  font-size: 16px;
}
.assign-module-title {
  font-size: 14px;
  font-weight: 800;
  flex: 1;
}
.assign-module-check {
  font-size: 12px;
  font-weight: 600;
  color: #6366f1;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 5px;
}
.assign-lessons {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 6px;
}
.assign-lesson {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  border-radius: 8px;
  background: #fafafd;
  font-size: 13px;
  color: #5a5a6a;
  cursor: pointer;
  transition: .15s;
}
.assign-lesson:hover { background: #f0f0ff; color: #6366f1; }
.assign-lesson input[type="checkbox"] {
  width: auto;
  accent-color: #6366f1;
}

.assign-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.assign-item {
  background: #fff;
  border: 1px solid #ececf1;
  border-radius: 14px;
  padding: 18px 20px;
  transition: .2s;
}
.assign-item.active { border-left: 4px solid #10b981; }
.assign-item.closed { border-left: 4px solid #cbd5e1; opacity: .85; }

.assign-item-head { margin-bottom: 10px; }
.assign-item-title {
  font-size: 15px;
  font-weight: 800;
  color: #16161a;
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 6px;
}
.assign-item-meta {
  font-size: 12.5px;
  color: #8a8a99;
}
.assign-item-desc {
  font-size: 13px;
  color: #5a5a6a;
  line-height: 1.7;
  padding: 10px 14px;
  background: #fafafd;
  border-radius: 8px;
  margin-bottom: 12px;
}
.assign-item-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.assign-progress {
  position: relative;
  height: 8px;
  background: #f0f0f6;
  border-radius: 99px;
  overflow: hidden;
  min-width: 120px;
}
.assign-progress-bar {
  height: 100%;
  background: linear-gradient(90deg, #10b981, #34d399);
  border-radius: 99px;
  transition: width .6s;
}
.assign-progress-num {
  position: absolute;
  top: 50%;
  right: 6px;
  transform: translateY(-50%);
  font-size: 9px;
  font-weight: 900;
  color: #fff;
  text-shadow: 0 0 3px rgba(0,0,0,.4);
  font-variant-numeric: tabular-nums;
}

@media (max-width: 600px) {
  .assign-zone { padding: 18px 16px; border-radius: 18px; }
  .assign-zone-icon { width: 44px; height: 44px; font-size: 26px; }
  .assign-zone-title { font-size: 16px; }
  .assign-card { padding: 14px 16px; }
  .assign-card-title { font-size: 14px; }
  .assign-card-time { font-size: 11px; padding: 3px 8px; }
  .assign-lesson-item { padding: 8px 10px; font-size: 12.5px; }
  .assign-lessons { grid-template-columns: 1fr; }
}

/* ============================================================
   作业区 · 未解锁提示
   ============================================================ */
.assign-locked-notice {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  margin-bottom: 14px;
  background: linear-gradient(135deg, #fff7ed, #ffedd5);
  border: 1px solid #fdba74;
  border-radius: 12px;
  font-size: 13px;
  color: #9a3412;
  line-height: 1.6;
}
.aln-icon {
  font-size: 20px;
  flex-shrink: 0;
}
.aln-body { flex: 1; min-width: 0; }
.aln-body b {
  color: #c2410c;
  font-weight: 900;
  font-size: 14px;
  padding: 0 3px;
}

.assign-lesson-item.locked {
  background: #f5f5f8;
  color: #9a9aab;
  border-color: transparent;
  cursor: not-allowed;
  opacity: .85;
}
.assign-lesson-item.locked .ali-check {
  background: #e2e2ea;
  color: #9a9aab;
  font-size: 11px;
}
.assign-lesson-item.locked .ali-title {
  color: #9a9aab;
}
.assign-lesson-item.locked .ali-locked-hint {
  font-size: 11.5px;
  font-weight: 700;
  color: #c2410c;
  background: #ffedd5;
  padding: 2px 10px;
  border-radius: 99px;
  white-space: nowrap;
  flex-shrink: 0;
}
.assign-lesson-item.locked:hover {
  background: #f5f5f8;
  border-color: transparent;
  transform: none;
}

.assign-lesson-item .ali-done-tag {
  font-size: 11.5px;
  font-weight: 800;
  color: #047857;
  background: #d1fae5;
  padding: 2px 10px;
  border-radius: 99px;
  white-space: nowrap;
  flex-shrink: 0;
}

@media (max-width: 600px) {
  .assign-lesson-item.locked .ali-locked-hint,
  .assign-lesson-item .ali-done-tag {
    font-size: 10.5px;
    padding: 2px 8px;
  }
}


/* ============================================================
   公告弹窗
   ============================================================ */
.ann-modal {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 22px;
  opacity: 0;
  pointer-events: none;
  transition: opacity .35s;
}
.ann-modal.show {
  opacity: 1;
  pointer-events: auto;
}

.ann-modal-bg {
  position: absolute;
  inset: 0;
  background: rgba(10, 10, 20, .55);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}

.ann-modal-card {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 440px;
  background: #fff;
  border-radius: 24px;
  box-shadow:
    0 40px 80px -30px rgba(16,16,32,.6),
    0 0 0 1px rgba(255,255,255,.4) inset;
  overflow: hidden;
  transform: scale(.92) translateY(16px);
  transition: transform .45s cubic-bezier(.2,.9,.3,1.15);
}
.ann-modal.show .ann-modal-card {
  transform: scale(1) translateY(0);
}

/* 顶部装饰条 */
.ann-modal-topbar {
  height: 5px;
  background: linear-gradient(90deg, #6366f1, #a855f7);
  transition: background .35s;
}

/* 关闭按钮 */
.ann-modal-close {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  border: none;
  background: #f5f5f8;
  color: #8a8a99;
  font-size: 18px;
  line-height: 1;
  cursor: pointer;
  display: grid;
  place-items: center;
  transition: .18s;
  font-family: inherit;
  z-index: 2;
}
.ann-modal-close:hover {
  background: #ececf1;
  color: #16161a;
  transform: rotate(90deg);
}

/* 主体 */
.ann-modal-body {
  position: relative;
  min-height: 220px;
  padding: 36px 32px 24px;
}
.ann-page {
  display: none;
  flex-direction: column;
  align-items: center;
  text-align: center;
  animation: annFadeIn .35s ease;
}
.ann-page.active {
  display: flex;
}
@keyframes annFadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

.ann-icon-wrap {
  width: 76px;
  height: 76px;
  border-radius: 24px;
  display: grid;
  place-items: center;
  border: 1.5px solid;
  margin-bottom: 18px;
  box-shadow: 0 12px 32px -16px rgba(16,16,32,.25);
}
.ann-icon {
  font-size: 36px;
  line-height: 1;
  animation: annIconFloat 3s ease-in-out infinite;
}
@keyframes annIconFloat {
  0%,100% { transform: translateY(0); }
  50% { transform: translateY(-4px); }
}

.ann-label {
  font-size: 11.5px;
  font-weight: 800;
  letter-spacing: 3px;
  text-transform: uppercase;
  margin-bottom: 10px;
  opacity: .85;
}

.ann-title {
  font-size: 22px;
  font-weight: 900;
  letter-spacing: -.4px;
  color: #16161a;
  margin-bottom: 14px;
  line-height: 1.35;
}

.ann-content {
  font-size: 14.5px;
  line-height: 1.85;
  color: #5a5a6a;
  text-align: left;
  padding: 16px 18px;
  background: #fafafd;
  border-radius: 14px;
  border-left: 3px solid #ececf1;
  width: 100%;
  max-height: 240px;
  overflow-y: auto;
  word-break: break-word;
}
.ann-content::-webkit-scrollbar { width: 6px; }
.ann-content::-webkit-scrollbar-thumb {
  background: #d4d4e0;
  border-radius: 99px;
}

/* 底部 */
.ann-modal-footer {
  padding: 18px 24px 22px;
  border-top: 1px dashed #ececf1;
  background: #fbfbfd;
}

.ann-dots {
  display: flex;
  gap: 6px;
  justify-content: center;
  margin-bottom: 14px;
}
.ann-dot {
  width: 22px;
  height: 4px;
  border-radius: 99px;
  background: #e2e2ea;
  transition: .25s;
  cursor: pointer;
}
.ann-dot.active {
  background: linear-gradient(90deg, #6366f1, #a855f7);
  width: 32px;
}

.ann-modal-actions {
  display: flex;
  gap: 10px;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
}

.ann-btn-primary {
  padding: 12px 32px;
  border-radius: 13px;
  border: none;
  background: linear-gradient(135deg, #6366f1, #a855f7);
  color: #fff;
  font-size: 14.5px;
  font-weight: 800;
  letter-spacing: .3px;
  cursor: pointer;
  font-family: inherit;
  box-shadow: 0 10px 24px -12px rgba(99,102,241,.9);
  transition: .2s;
  flex: 1;
  max-width: 220px;
}
.ann-btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 16px 32px -12px rgba(99,102,241,1);
}
.ann-btn-primary:active {
  transform: translateY(0) scale(.98);
}

.ann-btn-secondary {
  padding: 12px 22px;
  border-radius: 13px;
  border: 1px solid #e2e2ea;
  background: #fff;
  color: #5a5a6a;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  font-family: inherit;
  transition: .2s;
}
.ann-btn-secondary:hover {
  background: #f5f5f8;
  color: #16161a;
  border-color: #c8c8dc;
}

/* 手机适配 */
@media (max-width: 600px) {
  .ann-modal { padding: 16px; }
  .ann-modal-card { border-radius: 20px; }
  .ann-modal-body { padding: 30px 22px 20px; }
  .ann-icon-wrap { width: 64px; height: 64px; border-radius: 20px; }
  .ann-icon { font-size: 30px; }
  .ann-title { font-size: 19px; }
  .ann-content { font-size: 13.5px; padding: 14px 16px; max-height: 200px; }
  .ann-modal-footer { padding: 16px 18px 18px; }
  .ann-modal-close { top: 12px; right: 12px; width: 30px; height: 30px; }
  .ann-btn-primary { padding: 11px 24px; font-size: 14px; }
  .ann-btn-secondary { padding: 11px 18px; font-size: 13.5px; }
}


/* ============================================================
   PK 邀请弹窗
   ============================================================ */
.pk-invite-pop {
  position: fixed; inset: 0; z-index: 99999;
  display: flex; align-items: center; justify-content: center;
  padding: 22px;
  opacity: 0; pointer-events: none;
  transition: opacity .35s;
}
.pk-invite-pop.show { opacity: 1; pointer-events: auto; }
.pk-invite-bg {
  position: absolute; inset: 0;
  background: rgba(10,10,20,.6);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.pk-invite-card {
  position: relative; z-index: 1;
  width: 100%; max-width: 380px;
  padding: 34px 28px 26px;
  border-radius: 24px;
  background: linear-gradient(160deg, #1e1b4b, #4c1d95 55%, #7c3aed);
  color: #fff;
  text-align: center;
  box-shadow: 0 40px 80px -25px rgba(76,29,149,.95), 0 0 0 1px rgba(255,255,255,.14) inset;
  transform: scale(.9) translateY(20px);
  transition: transform .45s cubic-bezier(.2,.9,.3,1.15);
}
.pk-invite-pop.show .pk-invite-card { transform: scale(1) translateY(0); }

.pk-invite-icon {
  font-size: 60px;
  margin-bottom: 12px;
  animation: pkInviteShake 1.4s ease-in-out infinite;
}
@keyframes pkInviteShake {
  0%,100% { transform: rotate(0) }
  25% { transform: rotate(-10deg) scale(1.05) }
  75% { transform: rotate(10deg) scale(1.05) }
}
.pk-invite-title {
  font-size: 24px; font-weight: 900; letter-spacing: -.4px;
  margin-bottom: 10px;
  background: linear-gradient(135deg,#fff,#f9a8d4);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.pk-invite-desc {
  font-size: 14px; opacity: .9; line-height: 1.7; margin-bottom: 14px;
}
.pk-invite-desc b { color: #fbbf24; font-weight: 900; font-size: 16px; }
.pk-invite-bet {
  display: inline-block;
  padding: 8px 18px; border-radius: 99px;
  background: linear-gradient(135deg,#fef3c7,#fde68a);
  color: #92400e; font-size: 13px; font-weight: 800;
  margin-bottom: 18px;
}
.pk-invite-bet b { font-size: 16px; font-weight: 900; }

.pk-invite-actions {
  display: flex; gap: 10px; justify-content: center;
  margin-top: 6px;
}
.pk-invite-go {
  flex: 1;
  padding: 13px 24px; border-radius: 13px;
  background: linear-gradient(135deg,#f59e0b,#ef4444);
  color: #fff; font-size: 15px; font-weight: 900;
  border: none; cursor: pointer; font-family: inherit;
  letter-spacing: .5px;
  box-shadow: 0 10px 24px -10px rgba(239,68,68,.9);
  transition: .2s;
}
.pk-invite-go:hover { transform: translateY(-2px); box-shadow: 0 16px 32px -10px rgba(239,68,68,1); }
.pk-invite-later {
  padding: 13px 20px; border-radius: 13px;
  background: rgba(255,255,255,.14);
  color: #fff; font-size: 14px; font-weight: 700;
  border: 1px solid rgba(255,255,255,.22);
  cursor: pointer; font-family: inherit;
  transition: .18s;
}
.pk-invite-later:hover { background: rgba(255,255,255,.22); }

/* 对战页等待状态 */
.pkp-waiting {
  display: inline-block;
  padding: 12px 20px; border-radius: 12px;
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.15);
  color: #cbd5e1; font-size: 13.5px; line-height: 1.7;
  margin-top: 14px;
}
.pkp-bet-result {
  padding: 8px 16px; margin-bottom: 12px;
  border-radius: 99px;
  background: linear-gradient(135deg,#fef3c7,#fde68a);
  color: #92400e; font-size: 13px; font-weight: 800;
  display: inline-block;
}
.pkp-dot.current {
  background: linear-gradient(90deg,#fbbf24,#f59e0b);
  box-shadow: 0 0 16px rgba(251,191,36,.8);
  transform: scaleY(1.5);
}

/* ============================================================
   血量排行榜
   ============================================================ */
.heart-rank-card {
  background: #fff; border: 1px solid #ececf1; border-radius: 18px;
  padding: 20px 22px; margin-bottom: 24px;
}
.heart-rank-head {
  display: flex; align-items: baseline; gap: 12px; margin-bottom: 16px; flex-wrap: wrap;
}
.heart-rank-head h3 {
  font-size: 15.5px; font-weight: 800; letter-spacing: -.2px;
}
.heart-rank-head p {
  font-size: 12.5px; color: #8a8a99;
}
.heart-rank-list { display: flex; flex-direction: column; gap: 6px; }
.heart-rank-row {
  display: flex; align-items: center; gap: 12px;
  padding: 10px 14px; border-radius: 11px;
  background: #fafafd; border: 1px solid #ececf1;
  font-size: 13.5px;
}
.heart-rank-row.me {
  background: linear-gradient(90deg,#fff5f5,#fff 60%);
  border-color: #fecaca;
  box-shadow: inset 3px 0 0 #ef4444;
}
.hr-rank { width: 32px; text-align: center; font-weight: 800; color: #8a8a99; flex-shrink: 0; }
.hr-avatar {
  width: 28px; height: 28px; border-radius: 50%;
  background: linear-gradient(135deg,#6366f1,#a855f7);
  color: #fff; font-size: 12px; font-weight: 800;
  display: grid; place-items: center; flex-shrink: 0;
}
.hr-name { flex: 1; font-weight: 600; color: #16161a; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.hr-hp {
  display: flex; align-items: center; gap: 6px;
  font-variant-numeric: tabular-nums;
}
.hr-bar {
  width: 80px; height: 6px; border-radius: 99px;
  background: rgba(190,18,60,.12); overflow: hidden;
}
.hr-bar i {
  display: block; height: 100%; border-radius: 99px;
  background: linear-gradient(90deg,#f43f5e,#ec4899);
  transition: width .5s;
}
.hr-num { font-weight: 900; color: #be123c; min-width: 32px; text-align: right; }

@media (max-width: 600px) {
  .pk-invite-card { padding: 28px 22px 22px; border-radius: 20px; }
  .pk-invite-icon { font-size: 48px; }
  .pk-invite-title { font-size: 20px; }
  .hr-bar { width: 50px; }
  .heart-rank-row { padding: 9px 11px; gap: 9px; }
  .hr-avatar { width: 26px; height: 26px; font-size: 11px; }
}


/* ============================================================
   血量排行榜 · 移动端 grid 修复
   ============================================================ */
@media (max-width: 600px) {
  .heart-rank-row {
    display: grid !important;
    grid-template-columns: 32px 30px minmax(0, 1fr) auto !important;
    gap: 8px !important;
    align-items: center;
    padding: 10px 12px !important;
  }
  .hr-rank {
    width: auto !important;
    font-size: 12px;
    text-align: center;
  }
  .hr-avatar {
    width: 30px !important;
    height: 30px !important;
    font-size: 12px !important;
    flex-shrink: 0;
  }
  .hr-name {
    min-width: 0;
    font-size: 13px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
  .hr-hp {
    display: flex;
    align-items: center;
    gap: 0;
    flex-shrink: 0;
  }
  .hr-bar {
    display: none !important;   /* 手机上不要横条，只留数字 */
  }
  .hr-num {
    font-size: 14px;
    font-weight: 900;
    min-width: auto !important;
    color: #be123c;
  }
}


/* 0 分学员弱化显示 */
.heart-rank-row.zero {
    opacity: 0.55;
    filter: grayscale(0.8);
}
.heart-rank-row.zero .hr-num {
    color: #9a9aab;
}
/* 我的排名如果是 0 分，依然保持一点高亮 */
.heart-rank-row.zero.me {
    opacity: 0.85;
    filter: none;
    background: linear-gradient(90deg,#f5f5f8,#fff 60%);
    border-color: #e2e2ea;
    box-shadow: inset 3px 0 0 #9a9aab;
}


/* ============================================================
   PK 邀请弹窗 · 拒绝按钮
   ============================================================ */
.pk-invite-reject {
  flex: 0 0 auto;
  padding: 13px 26px;
  border-radius: 13px;
  background: rgba(255,255,255,.1);
  color: #fca5a5;
  font-size: 14.5px;
  font-weight: 800;
  border: 1px solid rgba(239,68,68,.35);
  cursor: pointer;
  font-family: inherit;
  letter-spacing: .3px;
  transition: .2s;
}
.pk-invite-reject:hover {
  background: rgba(239,68,68,.2);
  border-color: rgba(239,68,68,.6);
  color: #fecaca;
}
.pk-invite-reject:disabled {
  opacity: .5;
  cursor: default;
}

.pk-invite-tip {
  margin-top: 12px;
  font-size: 11.5px;
  color: rgba(255,255,255,.5);
  letter-spacing: .3px;
}

.pk-invite-go {
  flex: 1;
}

.pk-invite-actions {
  display: flex;
  gap: 10px;
  justify-content: center;
  margin-top: 6px;
}