/* =========================================================
   Lumina · 页面级样式
   ========================================================= */

/* ---------- 通用页头 ---------- */
.page-head{display:flex;align-items:flex-end;justify-content:space-between;gap:18px;margin-bottom:22px;flex-wrap:wrap}
.page-head h2{font-size:24px;font-weight:760;letter-spacing:-.3px}
.page-head p{font-size:13px;color:var(--text-3);margin-top:4px}
.breadcrumb{display:flex;align-items:center;gap:7px;font-size:12px;color:var(--text-3);margin-bottom:14px}
.breadcrumb a:hover{color:var(--a1)}
.breadcrumb svg{width:13px;height:13px}
.section-title{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:13px}
.section-title h3{font-size:15.5px;font-weight:720}
.section-title p{font-size:12px;color:var(--text-3)}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}

/* =========================================================
   1. 学习首页
   ========================================================= */
.welcome-hero{
  position:relative;border-radius:22px;overflow:hidden;padding:30px 34px;
  border:1px solid var(--line);
  background:
    radial-gradient(620px 280px at 88% 0%,rgba(129,140,248,.24),transparent 66%),
    radial-gradient(520px 300px at 4% 100%,rgba(94,234,212,.16),transparent 62%),
    linear-gradient(120deg,#0c1628,#0f1b31);
  display:grid;grid-template-columns:1fr auto;gap:24px;align-items:center;
}
html[data-theme="light"] .welcome-hero{background:radial-gradient(620px 280px at 88% 0%,rgba(129,140,248,.16),transparent 66%),radial-gradient(520px 300px at 4% 100%,rgba(13,148,136,.10),transparent 62%),linear-gradient(120deg,#ffffff,#f3f7ff)}
.wh-eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:11.5px;letter-spacing:1.4px;text-transform:uppercase;color:var(--a1);font-weight:700}
.wh-eyebrow .dot{width:6px;height:6px;border-radius:50%;background:var(--a1);box-shadow:0 0 0 4px rgba(94,234,212,.14)}
.welcome-hero h2{font-size:clamp(22px,2.4vw,30px);font-weight:770;letter-spacing:-.4px;margin:12px 0 8px;line-height:1.35}
.welcome-hero h2 span{background:linear-gradient(100deg,var(--a1),#7dd3fc 60%,var(--a2));-webkit-background-clip:text;background-clip:text;color:transparent}
.welcome-hero p{font-size:13.5px;color:var(--text-2);max-width:520px;line-height:1.8}
.wh-actions{display:flex;gap:10px;margin-top:20px;flex-wrap:wrap}
.wh-side{display:flex;align-items:center;gap:20px}
.daily-ring{position:relative;width:132px;height:132px;flex:none}
.daily-ring svg{width:132px;height:132px;transform:rotate(-90deg)}
.daily-ring .track{fill:none;stroke:rgba(255,255,255,.10);stroke-width:9}
html[data-theme="light"] .daily-ring .track{stroke:rgba(19,40,73,.10)}
.daily-ring .value{fill:none;stroke:url(#ringGrad);stroke-width:9;stroke-linecap:round}
.daily-ring-center{position:absolute;inset:0;display:grid;place-content:center;text-align:center}
.daily-ring-center b{font-size:25px;font-weight:780;font-variant-numeric:tabular-nums;line-height:1.1}
.daily-ring-center span{font-size:10.5px;color:var(--text-3);letter-spacing:.6px}
.wh-meta{display:grid;gap:9px}
.wh-meta div{font-size:12px;color:var(--text-2);display:flex;align-items:center;gap:7px}
.wh-meta svg{width:15px;height:15px;color:var(--a1)}
.wh-meta b{color:var(--text);font-weight:700}

.kpi-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:18px}
.kpi{
  display:flex;align-items:center;gap:13px;padding:16px 17px;border-radius:15px;
  background:var(--panel);border:1px solid var(--line);
}
.kpi-ic{width:38px;height:38px;border-radius:11px;display:grid;place-items:center;flex:none}
.kpi-ic svg{width:18px;height:18px}
.kpi b{display:block;font-size:20px;font-weight:770;line-height:1.2;font-variant-numeric:tabular-nums}
.kpi span{font-size:11.5px;color:var(--text-3)}
.kpi .trend{font-size:10.5px;color:var(--ok);margin-left:4px;font-weight:650}

.dash-grid{display:grid;grid-template-columns:1.55fr 1fr;gap:18px;margin-top:18px}
.dash-col{display:grid;gap:18px;align-content:start}

.continue-card{
  display:grid;grid-template-columns:1fr auto;gap:16px;align-items:center;padding:20px 22px;
  border-radius:16px;border:1px solid var(--line);
  background:linear-gradient(120deg,rgba(94,234,212,.07),rgba(129,140,248,.08));
}
.cc-subject{display:flex;align-items:center;gap:8px;font-size:11.5px;color:var(--text-2)}
.cc-sdot{width:8px;height:8px;border-radius:3px}
.continue-card h4{font-size:17px;font-weight:720;margin:7px 0 6px}
.continue-card p{font-size:12px;color:var(--text-3);max-width:440px}
.cc-progress{display:flex;align-items:center;gap:10px;margin-top:12px}
.cc-progress .bar{flex:1;max-width:280px}
.cc-progress span{font-size:11px;color:var(--text-3);font-variant-numeric:tabular-nums}
.cc-play{width:52px;height:52px;border-radius:50%;display:grid;place-items:center;background:linear-gradient(140deg,var(--a1),var(--a2));color:#05121f;box-shadow:0 10px 30px rgba(94,234,212,.25);flex:none}
.cc-play svg{width:20px;height:20px;fill:currentColor;stroke:none;margin-left:2px}
.cc-play:hover{filter:brightness(1.06)}

.task-list{display:grid;gap:10px}
.task-item{
  display:flex;align-items:center;gap:12px;padding:12px 13px;border-radius:12px;
  border:1px solid var(--line);background:var(--panel-2);
}
.task-idx{width:24px;height:24px;border-radius:8px;display:grid;place-items:center;font-size:11px;font-weight:750;background:var(--a1-soft);color:var(--a1);flex:none}
.task-item.done .task-idx{background:rgba(52,211,153,.16);color:var(--ok)}
.task-text{flex:1;min-width:0}
.task-text b{display:block;font-size:13px;font-weight:650;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.task-text span{font-size:11px;color:var(--text-3)}
.task-xp{font-size:11px;color:var(--warm);font-weight:700;white-space:nowrap}

.subject-rows{display:grid;gap:13px}
.subject-row{display:flex;align-items:center;gap:12px}
.sr-ic{width:30px;height:30px;border-radius:9px;display:grid;place-items:center;flex:none;font-size:12px;font-weight:750}
.sr-main{flex:1;min-width:0}
.sr-top{display:flex;justify-content:space-between;font-size:12px;margin-bottom:5px}
.sr-top b{font-weight:650}
.sr-top span{color:var(--text-3);font-size:11px;font-variant-numeric:tabular-nums}

.mini-chart{width:100%;height:150px}
.mini-chart text{font-size:9px;fill:var(--text-3)}
.mini-chart .grid-line{stroke:var(--line);stroke-width:1}
.mini-chart .line{fill:none;stroke:url(#chartGrad);stroke-width:2.4;stroke-linecap:round;stroke-linejoin:round}
.mini-chart .area{fill:url(#areaGrad)}
.mini-chart .dot{fill:var(--a1);stroke:var(--bg-2);stroke-width:2}

.quick-grid{display:grid;grid-template-columns:1fr 1fr;gap:11px}
.quick-tile{
  padding:14px;border-radius:13px;border:1px solid var(--line);background:var(--panel-2);
  display:flex;flex-direction:column;gap:9px;transition:.16s;
}
.quick-tile:hover{border-color:rgba(94,234,212,.35);background:var(--a1-soft)}
.quick-tile svg{width:19px;height:19px;color:var(--a1)}
.quick-tile b{font-size:12.5px;font-weight:650}
.quick-tile span{font-size:10.5px;color:var(--text-3)}

/* =========================================================
   2. 课程中心
   ========================================================= */
.catalog-hero{
  border-radius:20px;padding:26px 28px;border:1px solid var(--line);margin-bottom:22px;
  background:radial-gradient(560px 240px at 90% 10%,rgba(129,140,248,.18),transparent 62%),linear-gradient(120deg,var(--panel),transparent);
  display:grid;grid-template-columns:1fr auto;gap:20px;align-items:center;
}
.catalog-hero h2{font-size:22px;font-weight:750;letter-spacing:-.3px}
.catalog-hero p{font-size:12.5px;color:var(--text-3);margin-top:6px;max-width:560px;line-height:1.75}
.catalog-hero .hero-badge{font-size:11px;color:var(--a2);border:1px solid rgba(129,140,248,.35);background:var(--a2-soft);border-radius:999px;padding:6px 12px;display:inline-flex;align-items:center;gap:6px;font-weight:650}
.catalog-hero .hero-badge svg{width:14px;height:14px}

.filters{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:16px}
.filters .chip-scroll{display:flex;gap:8px;flex-wrap:wrap}
.filter-search{margin-left:auto;position:relative;display:flex;align-items:center}
.filter-search svg{position:absolute;left:11px;width:15px;height:15px;color:var(--text-3)}
.filter-search input{height:36px;width:210px;padding:0 12px 0 33px;border-radius:10px;background:var(--panel);border:1px solid var(--line);outline:none;font-size:12.5px}
.filter-search input:focus{border-color:rgba(94,234,212,.45)}

.subject-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-bottom:24px}
.subject-card{
  position:relative;border:1px solid var(--line);border-radius:16px;padding:17px;
  background:var(--panel);overflow:hidden;transition:.18s;cursor:pointer;
}
.subject-card::before{content:"";position:absolute;inset:0;background:radial-gradient(220px 130px at 100% 0%,var(--sc,rgba(94,234,212,.16)),transparent 70%);opacity:.55;pointer-events:none}
.subject-card:hover{border-color:var(--line-strong);transform:translateY(-2px)}
.subject-card.is-active{border-color:var(--sc-border,rgba(94,234,212,.5));box-shadow:0 0 0 1px var(--sc-border,rgba(94,234,212,.36))}
.sc-top{display:flex;align-items:center;justify-content:space-between;position:relative}
.sc-ic{width:38px;height:38px;border-radius:11px;display:grid;place-items:center;background:var(--sc-soft,rgba(94,234,212,.14));color:var(--sc-color,var(--a1))}
.sc-ic svg{width:19px;height:19px}
.sc-count{font-size:10.5px;color:var(--text-3);font-variant-numeric:tabular-nums}
.subject-card h4{font-size:14.5px;font-weight:700;margin-top:12px;position:relative}
.subject-card p{font-size:11px;color:var(--text-3);margin-top:3px;position:relative;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.sc-bar{margin-top:12px;position:relative}
.sc-bar .bar{height:5px}
.sc-bar span{display:block;font-size:10px;color:var(--text-3);margin-top:5px}

.course-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.course-card{
  display:flex;flex-direction:column;border:1px solid var(--line);border-radius:16px;
  background:var(--panel);overflow:hidden;transition:.18s;position:relative;
}
.course-card:hover{border-color:var(--line-strong);background:var(--panel-2)}
.course-cover{
  height:104px;position:relative;padding:14px 16px;display:flex;flex-direction:column;justify-content:space-between;
  background:linear-gradient(135deg,var(--cc-soft,rgba(94,234,212,.13)),rgba(10,18,32,.25));
  border-bottom:1px solid var(--line);
}
.course-cover::after{
  content:"";position:absolute;right:-24px;top:-34px;width:130px;height:130px;border-radius:50%;
  border:16px solid var(--cc-wash,rgba(94,234,212,.10));
}
.course-level{font-size:10px;letter-spacing:1.4px;color:var(--cc-color,var(--a1));font-weight:700;text-transform:uppercase}
.course-cover h4{font-size:15.5px;font-weight:720;line-height:1.4;position:relative;z-index:1;max-width:86%}
.course-body{padding:14px 16px 16px;display:flex;flex-direction:column;gap:12px;flex:1}
.course-meta{display:flex;align-items:center;gap:10px;font-size:11px;color:var(--text-3)}
.course-meta span{display:flex;align-items:center;gap:4px}
.course-meta svg{width:12.5px;height:12.5px}
.course-progress{margin-top:auto}
.course-progress .row{justify-content:space-between;font-size:10.5px;color:var(--text-3);margin-bottom:5px}
.course-progress b{color:var(--text-2);font-weight:650}
.course-foot{display:flex;align-items:center;justify-content:space-between;margin-top:12px}
.course-foot .tag{font-size:10px}

.lesson-list{display:grid;gap:9px}
.lesson-row{
  display:flex;align-items:center;gap:13px;padding:13px 15px;border:1px solid var(--line);
  border-radius:12px;background:var(--panel);transition:.15s;
}
.lesson-row:hover{border-color:var(--line-strong);background:var(--panel-2)}
.lesson-num{
  width:30px;height:30px;border-radius:9px;display:grid;place-items:center;flex:none;
  font-size:11.5px;font-weight:750;background:var(--panel-2);color:var(--text-3);font-variant-numeric:tabular-nums;
}
.lesson-row.done .lesson-num{background:rgba(52,211,153,.14);color:var(--ok)}
.lesson-info{flex:1;min-width:0}
.lesson-info b{display:block;font-size:13.5px;font-weight:650;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.lesson-info span{font-size:11px;color:var(--text-3)}
.lesson-time{font-size:11px;color:var(--text-3);white-space:nowrap;display:flex;align-items:center;gap:4px}
.lesson-time svg{width:12px;height:12px}
.lesson-state{font-size:10.5px;padding:3px 8px;border-radius:6px;background:var(--a1-soft);color:var(--a1);font-weight:650}
.lesson-row.locked{opacity:.55}

.course-detail-hero{
  border-radius:20px;border:1px solid var(--line);padding:28px 30px;margin-bottom:20px;
  background:
    radial-gradient(540px 240px at 92% 8%,var(--cd-wash,rgba(94,234,212,.18)),transparent 65%),
    linear-gradient(120deg,var(--bg-3),rgba(10,18,32,.4));
  display:grid;grid-template-columns:1fr auto;gap:22px;align-items:center;
}
html[data-theme="light"] .course-detail-hero{background:radial-gradient(540px 240px at 92% 8%,rgba(19,40,73,.06),transparent 65%),linear-gradient(120deg,#fff,#f4f8ff)}
.course-detail-hero .cd-level{display:inline-flex;align-items:center;gap:7px;font-size:11px;font-weight:700;letter-spacing:1.2px;color:var(--cd-color,var(--a1));text-transform:uppercase}
.course-detail-hero h2{font-size:clamp(22px,2.6vw,30px);font-weight:770;letter-spacing:-.4px;margin:10px 0 8px}
.course-detail-hero p{font-size:13px;color:var(--text-2);line-height:1.8;max-width:640px}
.cd-stats{display:flex;gap:26px;margin-top:18px;flex-wrap:wrap}
.cd-stats div{font-size:11px;color:var(--text-3)}
.cd-stats b{display:block;font-size:18px;font-weight:750;color:var(--text);font-variant-numeric:tabular-nums}
.cd-ring{width:112px;height:112px;position:relative;flex:none}
.cd-ring svg{width:112px;height:112px;transform:rotate(-90deg)}
.cd-ring .track{fill:none;stroke:rgba(255,255,255,.1);stroke-width:8}
html[data-theme="light"] .cd-ring .track{stroke:rgba(19,40,73,.09)}
.cd-ring .value{fill:none;stroke:var(--cd-color,var(--a1));stroke-width:8;stroke-linecap:round}
.cd-ring b{position:absolute;inset:0;display:grid;place-content:center;text-align:center;font-size:20px;font-weight:760}
.cd-ring span{position:absolute;left:0;right:0;bottom:26px;text-align:center;font-size:9.5px;color:var(--text-3)}

.detail-grid{display:grid;grid-template-columns:1fr 300px;gap:18px;align-items:start}
.detail-side{display:grid;gap:16px}
.detail-side .card{padding:18px}
.side-facts{display:grid;gap:12px}
.side-facts div{display:flex;justify-content:space-between;font-size:12px}
.side-facts span{color:var(--text-3)}
.side-facts b{font-weight:650;text-align:right}
.level-list{display:grid;gap:8px}
.level-pill{display:flex;align-items:center;justify-content:space-between;padding:9px 11px;border-radius:9px;border:1px solid var(--line);font-size:11.5px;color:var(--text-2)}
.level-pill.active{border-color:rgba(94,234,212,.35);background:var(--a1-soft);color:var(--text)}
.level-pill b{font-weight:650}
.level-pill span{font-size:10px;color:var(--text-3)}

/* =========================================================
   3. 课时学习
   ========================================================= */
.lesson-layout{display:grid;grid-template-columns:1fr 320px;gap:20px;align-items:start}
.lesson-content{padding:26px 28px}
.lesson-content .lc-tag{display:flex;align-items:center;gap:9px;margin-bottom:14px;flex-wrap:wrap}
.lesson-content h2{font-size:24px;font-weight:770;letter-spacing:-.3px;line-height:1.35}
.lesson-content .lc-lead{font-size:14px;color:var(--text-2);line-height:1.9;margin-top:12px}
.lc-section{margin-top:24px;padding-top:22px;border-top:1px dashed var(--line)}
.lc-section h3{font-size:15px;font-weight:720;display:flex;align-items:center;gap:8px;margin-bottom:11px}
.lc-section h3 .bar-accent{width:3px;height:15px;border-radius:2px;background:var(--a1)}
.point-list{display:grid;gap:9px}
.point-list li{
  display:flex;gap:10px;font-size:13px;color:var(--text-2);line-height:1.75;
  padding:11px 13px;border-radius:10px;background:var(--panel-2);border:1px solid var(--line);
}
.point-list li b{color:var(--text)}
.point-list .pl-dot{width:18px;height:18px;border-radius:6px;background:var(--a1-soft);color:var(--a1);display:grid;place-items:center;font-size:9.5px;font-weight:750;flex:none;margin-top:2px}
.note-box{font-size:12.5px;color:var(--text-2);line-height:1.85;padding:14px 16px;border-left:3px solid var(--a2);background:var(--a2-soft);border-radius:0 10px 10px 0}
.quiz-box{margin-top:24px;border:1px solid var(--line);border-radius:14px;padding:18px 20px;background:var(--panel-2)}
.quiz-box h4{font-size:13.5px;font-weight:700;margin-bottom:6px;display:flex;align-items:center;gap:8px}
.quiz-box h4 svg{width:15px;height:15px;color:var(--a2)}
.quiz-q{font-size:13.5px;margin:10px 0 13px;line-height:1.75}
.quiz-options{display:grid;gap:8px}
.quiz-opt{
  text-align:left;padding:10px 13px;border-radius:9px;border:1px solid var(--line);
  background:var(--panel);font-size:12.5px;transition:.14s;display:flex;gap:10px;align-items:center;
}
.quiz-opt:hover:not(.dis){border-color:rgba(129,140,248,.5);background:var(--a2-soft)}
.quiz-opt em.dot,.ex-item em.dot{
  font-style:normal;
  text-emphasis:dot;
  -webkit-text-emphasis:dot;
  text-emphasis-position:under;
  -webkit-text-emphasis-position:under;
  text-emphasis-color:var(--a1);
  -webkit-text-emphasis-color:var(--a1);
  text-decoration:underline dotted rgba(94,234,212,.55);
  text-underline-offset:2px;
  font-weight:700;
}
.quiz-opt .qo-key{width:20px;height:20px;border-radius:6px;background:var(--panel-2);display:grid;place-items:center;font-size:10px;font-weight:750;color:var(--text-3);flex:none}
.quiz-opt.correct{border-color:rgba(52,211,153,.55);background:rgba(52,211,153,.10)}
.quiz-opt.correct .qo-key{background:rgba(52,211,153,.2);color:var(--ok)}
.quiz-opt.wrong{border-color:rgba(251,113,133,.5);background:rgba(251,113,133,.09)}
.quiz-opt.wrong .qo-key{background:rgba(251,113,133,.18);color:var(--bad)}
.quiz-explain{font-size:12px;color:var(--text-2);line-height:1.75;margin-top:12px;padding:11px 13px;border-radius:8px;background:var(--panel);border:1px dashed var(--line);display:none}
.quiz-explain.show{display:block}

/* ---------- 学习资料：目标 / 知识点 / 例题 / 易错 / 练习 ---------- */
.obj-list{display:grid;gap:8px}
.obj-list li{display:flex;gap:9px;font-size:13px;color:var(--text-2);line-height:1.7;padding:10px 13px;border-radius:9px;background:var(--panel-2);border:1px solid var(--line)}
.obj-list svg{width:14px;height:14px;color:var(--ok);flex:none;margin-top:3px}
.kp-list{display:grid;gap:12px}
.kp-card{border:1px solid var(--line);border-radius:12px;padding:15px 17px;background:var(--panel-2)}
.kp-card h4{font-size:13.5px;font-weight:720;display:flex;gap:9px;align-items:center;margin-bottom:9px;color:var(--text)}
.kp-no{width:20px;height:20px;border-radius:6px;background:var(--a1-soft);color:var(--a1);display:grid;place-items:center;font-size:10.5px;font-weight:750;flex:none;font-style:normal}
.kp-body{font-size:13px;color:var(--text-2);line-height:1.88}
.kp-body b{color:var(--text)}
.kp-body p{margin:0 0 8px}
.kp-body p:last-child{margin-bottom:0}
.kp-body ul,.kp-body ol{margin:6px 0 8px 18px;display:grid;gap:4px}
.kp-key{display:flex;gap:8px;align-items:flex-start;margin-top:11px;padding:9px 11px;border-radius:8px;background:var(--a1-soft);font-size:12px;line-height:1.7;color:var(--text)}
.kp-key svg{width:13px;height:13px;color:var(--a1);flex:none;margin-top:3px}
.eg-box{border:1px solid var(--line);border-radius:12px;overflow:hidden;background:var(--panel-2)}
.eg-q{padding:14px 17px;background:var(--panel);font-size:13px;line-height:1.8;border-bottom:1px dashed var(--line)}
.eg-steps{margin:0;padding:14px 17px 6px 36px;display:grid;gap:8px}
.eg-steps li{font-size:12.5px;color:var(--text-2);line-height:1.8}
.eg-steps li::marker{color:var(--a1);font-weight:700;font-size:11px}
.eg-answer{margin:8px 17px 0;font-size:12.5px;color:var(--text-2);line-height:1.8}
.eg-answer b{color:var(--ok);margin-right:8px;font-size:11.5px;padding:2px 7px;border-radius:5px;background:rgba(52,211,153,.14)}
.eg-tip{display:flex;gap:8px;margin:12px 17px 15px;padding:9px 11px;border-radius:8px;background:var(--a2-soft);font-size:12px;line-height:1.7;color:var(--text-2)}
.eg-tip svg{width:13px;height:13px;color:var(--a2);flex:none;margin-top:3px}
.pitfall-list{display:grid;gap:8px}
.pitfall{display:flex;gap:9px;font-size:12.5px;line-height:1.75;color:var(--text-2);padding:10px 13px;border-radius:9px;border:1px solid rgba(251,113,133,.28);background:rgba(251,113,133,.06)}
.pitfall svg{width:13px;height:13px;color:var(--bad);flex:none;margin-top:3px}
.ex-count{font-style:normal;font-size:10.5px;color:var(--text-3);font-weight:600;padding:2px 7px;border-radius:6px;background:var(--panel-2);border:1px solid var(--line)}
.ex-list{display:grid;gap:12px}
.ex-item{border:1px solid var(--line);border-radius:12px;padding:15px 17px;background:var(--panel-2)}
.ex-head{display:flex;gap:10px;font-size:13px;line-height:1.8;margin-bottom:11px}
.ex-no{width:20px;height:20px;border-radius:6px;background:var(--a2-soft);color:var(--a2);display:grid;place-items:center;font-size:10.5px;font-weight:750;flex:none;margin-top:2px}
.ex-item .quiz-opt{background:var(--panel)}

/* ---------- 生字词 ---------- */
.vocab-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:10px}
.vocab-card{border:1px solid var(--line);border-radius:10px;padding:12px 14px;background:var(--panel-2)}
.vc-head{display:flex;align-items:baseline;gap:10px;margin-bottom:6px}
.vc-word{font-size:18px;font-weight:760;color:var(--text)}
.vc-pinyin{font-size:12.5px;color:var(--a1);font-style:italic}
.vc-meaning{font-size:12.5px;color:var(--text-2);line-height:1.7;margin-bottom:8px}
.vc-compounds{display:flex;flex-wrap:wrap;gap:5px}
.vc-tag{font-size:11px;padding:2px 8px;border-radius:5px;background:var(--a1-soft);color:var(--a1);border:1px solid var(--line)}

/* ---------- 课文赏析 ---------- */
.appreciation{font-size:13.5px;line-height:1.95;color:var(--text-2);padding:16px 18px;border-radius:12px;background:var(--panel-2);border:1px solid var(--line);border-left:3px solid var(--a2)}
.appreciation p{margin:0 0 10px}
.appreciation p:last-child{margin-bottom:0}
.appreciation b{color:var(--text)}
.appreciation blockquote{margin:8px 0;padding:8px 12px;border-left:3px solid var(--a1);background:var(--panel);font-size:13px;color:var(--text-3);border-radius:0 6px 6px 0}

/* ---------- 多例题 ---------- */
.eg-list{display:grid;gap:14px}
.eg-num{display:inline-block;font-size:11px;font-weight:700;color:var(--a1);padding:2px 10px;border-radius:6px;background:var(--a1-soft);margin-bottom:10px}

/* ---------- 练习：阅读短文 / 完形填空 / 难度标签 ---------- */
.ex-passage{font-size:12.5px;line-height:1.9;color:var(--text-2);padding:12px 14px;border-radius:8px;background:var(--panel);border:1px dashed var(--line);margin-bottom:12px}
.ex-passage.cloze b{color:var(--a2);border-bottom:1.5px dashed var(--a2);padding:0 2px}
.ex-level{font-style:normal;font-size:10px;font-weight:700;padding:2px 8px;border-radius:5px;margin-right:8px;vertical-align:2px}
.ex-level-基础{background:rgba(52,211,153,.14);color:var(--ok)}
.ex-level-拓展{background:rgba(56,189,248,.14);color:#38bdf8}
.ex-level-应用{background:rgba(167,139,250,.15);color:#a78bfa}
.ex-level-提升{background:rgba(251,191,36,.14);color:var(--a2)}
.ex-level-综合{background:rgba(248,113,113,.12);color:var(--bad)}
.ex-level-阅读{background:rgba(244,114,182,.14);color:var(--a1)}
.ex-level-完形{background:rgba(163,230,53,.14);color:#7fb029}
.ex-head>div{line-height:1.7}
.lesson-actions{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:24px;padding-top:20px;border-top:1px solid var(--line);flex-wrap:wrap}
.lesson-side{display:grid;gap:16px;position:sticky;top:calc(var(--topbar-h) + 20px)}
.side-block{padding:17px}
.side-block h4{font-size:13px;font-weight:700;margin-bottom:11px;display:flex;align-items:center;gap:7px}
.side-block h4 svg{width:15px;height:15px;color:var(--a1)}
.outline-list{display:grid;gap:2px}
.outline-list a{display:flex;gap:9px;font-size:12px;color:var(--text-2);padding:7px 8px;border-radius:7px;line-height:1.5}
.outline-list a:hover{background:var(--panel-2);color:var(--text)}
.outline-list a.on{background:var(--a1-soft);color:var(--a1)}
.outline-list i{font-style:normal;color:var(--text-3);font-size:10.5px;min-width:14px;font-variant-numeric:tabular-nums}
.lesson-progress-ring{display:flex;align-items:center;gap:14px}
.lp-ring{width:64px;height:64px;position:relative;flex:none}
.lp-ring svg{width:64px;height:64px;transform:rotate(-90deg)}
.lp-ring .track{fill:none;stroke:var(--line);stroke-width:6}
.lp-ring .value{fill:none;stroke:var(--a1);stroke-width:6;stroke-linecap:round}
.lp-ring b{position:absolute;inset:0;display:grid;place-content:center;font-size:13px;font-weight:750}
.lesson-progress-ring p{font-size:11.5px;color:var(--text-3);line-height:1.7}
.lesson-progress-ring p b{color:var(--text);display:block;font-size:13px;margin-bottom:2px}
.lesson-complete-banner{
  display:flex;align-items:center;gap:12px;padding:14px 16px;border-radius:12px;margin-top:18px;
  background:rgba(52,211,153,.09);border:1px solid rgba(52,211,153,.28);color:var(--text-2);font-size:12.5px;
}
.lesson-complete-banner svg{width:20px;height:20px;color:var(--ok);flex:none}
.lesson-complete-banner b{color:var(--text)}

/* =========================================================
   4. 语言实验室
   ========================================================= */
.lab-hero{
  border-radius:22px;padding:28px 30px;border:1px solid var(--line);position:relative;overflow:hidden;
  background:
    radial-gradient(520px 260px at 12% 0%,rgba(94,234,212,.20),transparent 62%),
    radial-gradient(480px 240px at 88% 100%,rgba(240,171,252,.16),transparent 64%),
    linear-gradient(125deg,#0b1626,#101a30);
  display:grid;grid-template-columns:1fr auto;gap:22px;align-items:center;margin-bottom:18px;
}
html[data-theme="light"] .lab-hero{background:radial-gradient(520px 260px at 12% 0%,rgba(13,148,136,.12),transparent 62%),radial-gradient(480px 240px at 88% 100%,rgba(192,38,211,.08),transparent 64%),linear-gradient(125deg,#fff,#f6f9ff)}
.lab-hero h2{font-size:clamp(22px,2.5vw,29px);font-weight:770;letter-spacing:-.4px;margin:8px 0 8px}
.lab-hero p{font-size:13px;color:var(--text-2);line-height:1.8;max-width:560px}
.lab-hero .tag{margin-bottom:2px}
.lab-stats{display:flex;gap:12px}
.lab-stat{
  width:96px;padding:14px 12px;border-radius:14px;border:1px solid var(--line);
  background:rgba(255,255,255,.05);text-align:center;
}
html[data-theme="light"] .lab-stat{background:#fff}
.lab-stat b{display:block;font-size:22px;font-weight:770;font-variant-numeric:tabular-nums;line-height:1.2}
.lab-stat span{font-size:10.5px;color:var(--text-3)}
.lab-stat:nth-child(1) b{color:var(--a1)}
.lab-stat:nth-child(2) b{color:var(--a2)}
.lab-stat:nth-child(3) b{color:var(--warm)}

.mode-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-bottom:20px}
.mode-card{
  padding:18px;border-radius:16px;border:1px solid var(--line);background:var(--panel);
  display:flex;flex-direction:column;gap:10px;transition:.18s;position:relative;overflow:hidden;text-align:left;
}
.mode-card:hover{border-color:var(--line-strong);transform:translateY(-2px)}
.mode-card.active{border-color:rgba(94,234,212,.45);background:linear-gradient(150deg,var(--a1-soft),rgba(129,140,248,.08))}
.mode-ic{width:40px;height:40px;border-radius:12px;display:grid;place-items:center;background:var(--mc-soft,rgba(94,234,212,.13));color:var(--mc,var(--a1))}
.mode-ic svg{width:20px;height:20px}
.mode-card b{font-size:14px;font-weight:700}
.mode-card p{font-size:11.5px;color:var(--text-3);line-height:1.6}
.mode-card .mc-foot{display:flex;align-items:center;justify-content:space-between;font-size:10.5px;color:var(--text-3);margin-top:2px}
.mode-card .mc-foot .tag{font-size:9.5px;padding:2px 7px}

.lab-panel{border:1px solid var(--line);border-radius:20px;background:var(--panel);padding:24px 26px;min-height:420px}
.lab-panel-head{display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;margin-bottom:20px}
.lab-panel-head h3{font-size:18px;font-weight:740;display:flex;align-items:center;gap:9px}
.lab-panel-head h3 svg{width:19px;height:19px;color:var(--a1)}
.lab-tools{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.lab-select{height:32px;padding:0 28px 0 10px;border-radius:8px;background:var(--panel-2);border:1px solid var(--line);font-size:12px;color:var(--text);appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%238b9bb5' stroke-width='2' stroke-linecap='round'%3E%3Cpath d='m5 9 7 7 7-7'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 8px center}
.lab-select option{background:var(--bg-2);color:var(--text)}
.lab-select.lab-unit{max-width:240px;text-overflow:ellipsis}
@media (max-width:640px){.lab-select.lab-unit{max-width:100%}}
html[data-theme="light"] .lab-select option{background:#fff;color:#10203a}
.lab-progress{display:flex;align-items:center;gap:10px;font-size:11.5px;color:var(--text-3);margin-bottom:18px}
.lab-progress .bar{flex:1;max-width:320px}

/* 单词闪卡 */
.flash-stage{display:grid;place-items:center;padding:8px 0 18px}
.flashcard{width:100%;max-width:560px;height:288px;perspective:1400px;cursor:pointer}
.flashcard-inner{position:relative;width:100%;height:100%;transform-style:preserve-3d;transition:transform .45s var(--ease)}
.flashcard.flipped .flashcard-inner{transform:rotateY(180deg)}
.flash-face{
  position:absolute;inset:0;backface-visibility:hidden;border-radius:18px;border:1px solid var(--line-strong);
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;padding:26px;
  background:
    radial-gradient(300px 180px at 82% 8%,rgba(129,140,248,.20),transparent 62%),
    linear-gradient(150deg,#0c1729,#101c33);
  text-align:center;
}
html[data-theme="light"] .flash-face{background:radial-gradient(300px 180px at 82% 8%,rgba(99,102,241,.10),transparent 62%),linear-gradient(150deg,#fff,#f5f8ff)}
.flash-face.back{
  transform:rotateY(180deg);
  background:radial-gradient(300px 180px at 18% 90%,rgba(94,234,212,.18),transparent 62%),linear-gradient(150deg,#0d1826,#101f30);
}
html[data-theme="light"] .flash-face.back{background:radial-gradient(300px 180px at 18% 90%,rgba(13,148,136,.10),transparent 62%),linear-gradient(150deg,#fff,#f2fbf9)}
.flash-word{font-size:44px;font-weight:780;letter-spacing:-.8px;line-height:1.1}
.flash-phonetic{font-size:13.5px;color:var(--text-3);letter-spacing:.5px;font-family:"Consolas","SF Mono",monospace}
.flash-hint{font-size:11px;color:var(--text-3);margin-top:8px;display:flex;align-items:center;gap:6px}
.flash-hint svg{width:13px;height:13px}
.flash-back-title{font-size:11px;letter-spacing:2px;color:var(--a1);text-transform:uppercase;font-weight:650}
.flash-meaning{font-size:26px;font-weight:730;letter-spacing:-.2px}
.flash-example{font-size:13px;color:var(--text-2);line-height:1.8;max-width:440px;margin-top:4px}
.flash-example b{color:var(--a1);font-weight:650}
.flash-audio{
  position:absolute;top:14px;right:14px;width:34px;height:34px;border-radius:10px;
  display:grid;place-items:center;background:var(--panel-2);border:1px solid var(--line);color:var(--text-2);z-index:3;
}
.flash-audio:hover{color:var(--a1);border-color:rgba(94,234,212,.4)}
.flash-actions{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin-top:18px}
.btn-rate{flex:1;max-width:170px;height:44px;border-radius:11px;font-size:12.5px;font-weight:650;border:1px solid var(--line);background:var(--panel-2);display:flex;align-items:center;justify-content:center;gap:7px}
.btn-rate:hover{border-color:var(--line-strong)}
.btn-rate.again:hover{background:rgba(251,113,133,.10);border-color:rgba(251,113,133,.4);color:var(--bad)}
.btn-rate.hard:hover{background:rgba(251,191,36,.10);border-color:rgba(251,191,36,.4);color:var(--warm)}
.btn-rate.good:hover{background:rgba(52,211,153,.10);border-color:rgba(52,211,153,.4);color:var(--ok)}
.flash-meta{display:flex;align-items:center;justify-content:center;gap:18px;font-size:11px;color:var(--text-3);margin-top:16px}
.flash-meta span{display:flex;align-items:center;gap:5px}
.flash-meta svg{width:13px;height:13px}
.word-summary{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:18px}
.ws-cell{padding:14px;border-radius:12px;background:var(--panel-2);border:1px solid var(--line);text-align:center}
.ws-cell b{display:block;font-size:19px;font-weight:750;font-variant-numeric:tabular-nums}
.ws-cell span{font-size:10.5px;color:var(--text-3)}

/* 语法 */
.grammar-wrap{max-width:720px;margin:0 auto}
.grammar-question{font-size:17px;font-weight:650;line-height:1.7;margin:6px 0 18px}
.grammar-question .blank{display:inline-block;min-width:64px;border-bottom:2px solid var(--a1);color:var(--a1);text-align:center;font-weight:750}
.grammar-opts{display:grid;gap:9px;grid-template-columns:1fr 1fr}
.grammar-opt{padding:13px 15px;border-radius:11px;border:1px solid var(--line);background:var(--panel-2);font-size:13.5px;text-align:left;transition:.14s}
.grammar-opt:hover:not(.dis){border-color:rgba(129,140,248,.55);background:var(--a2-soft)}
.grammar-opt.correct{border-color:rgba(52,211,153,.55);background:rgba(52,211,153,.1);color:var(--ok);font-weight:650}
.grammar-opt.wrong{border-color:rgba(251,113,133,.5);background:rgba(251,113,133,.09);color:var(--bad)}
.grammar-feedback{margin-top:16px;padding:14px 16px;border-radius:11px;border:1px dashed var(--line);background:var(--panel);font-size:12.5px;line-height:1.75;color:var(--text-2);display:none}
.grammar-feedback.show{display:block}
.grammar-feedback b{color:var(--text)}
.grammar-foot{display:flex;align-items:center;justify-content:space-between;margin-top:20px;gap:12px}
.grammar-score{font-size:11.5px;color:var(--text-3)}
.grammar-score b{color:var(--ok);font-size:15px;font-variant-numeric:tabular-nums}

/* 口语 */
.speak-wrap{max-width:720px;margin:0 auto;text-align:center}
.speak-target{font-size:26px;font-weight:700;line-height:1.55;letter-spacing:-.2px;margin:14px 0 8px}
.speak-target-sub{font-size:12.5px;color:var(--text-3);margin-bottom:22px}
.speak-mic-wrap{display:grid;place-items:center;gap:12px;margin:12px 0 22px}
.mic-btn{
  width:86px;height:86px;border-radius:50%;display:grid;place-items:center;
  background:linear-gradient(140deg,rgba(94,234,212,.22),rgba(129,140,248,.22));
  border:1px solid rgba(94,234,212,.45);color:var(--a1);position:relative;transition:.18s;
}
.mic-btn svg{width:32px;height:32px}
.mic-btn:hover{background:linear-gradient(140deg,rgba(94,234,212,.32),rgba(129,140,248,.32))}
.mic-btn.recording{background:linear-gradient(140deg,rgba(251,113,133,.25),rgba(240,171,252,.25));border-color:rgba(251,113,133,.6);color:var(--bad)}
.mic-btn.recording::after{content:"";position:absolute;inset:-8px;border-radius:50%;border:2px solid rgba(251,113,133,.4);animation:pulse 1.5s infinite}
@keyframes pulse{0%{transform:scale(.9);opacity:.9}100%{transform:scale(1.25);opacity:0}}
.mic-hint{font-size:11.5px;color:var(--text-3)}
.speak-result{display:none;margin-top:18px;padding:18px;border-radius:14px;border:1px solid var(--line);background:var(--panel-2);text-align:left}
.speak-result.show{display:block}
.sr-score-row{display:flex;align-items:center;gap:18px;margin-bottom:14px}
.sr-score{font-size:38px;font-weight:780;line-height:1;font-variant-numeric:tabular-nums}
.sr-score small{font-size:13px;color:var(--text-3);font-weight:500;margin-left:3px}
.sr-verdict{font-size:12.5px;color:var(--text-2)}
.sr-verdict b{display:block;font-size:14px;color:var(--text);margin-bottom:2px}
.sr-words{display:flex;flex-wrap:wrap;gap:6px;margin:12px 0}
.sr-word{font-size:12.5px;padding:4px 8px;border-radius:6px;background:rgba(52,211,153,.12);color:var(--ok);border:1px solid rgba(52,211,153,.25)}
.sr-word.miss{background:rgba(251,113,133,.10);color:var(--bad);border-color:rgba(251,113,133,.25);text-decoration:line-through}
.sr-heard{font-size:11.5px;color:var(--text-3);margin-top:10px;line-height:1.7}
.sr-heard b{color:var(--text-2)}
.speak-manual{display:flex;align-items:center;justify-content:center;gap:8px;margin-top:8px;font-size:11.5px;color:var(--text-3)}
.speak-sentences{display:flex;gap:6px;justify-content:center;flex-wrap:wrap;margin-top:16px}

/* 听力 */
.listen-wrap{max-width:720px;margin:0 auto}
.listen-player{display:flex;align-items:center;gap:18px;padding:18px 20px;border-radius:14px;background:var(--panel-2);border:1px solid var(--line);margin-bottom:18px}
.listen-play{width:50px;height:50px;border-radius:50%;display:grid;place-items:center;background:linear-gradient(140deg,var(--a1),var(--a2));color:#05121f;flex:none}
.listen-play svg{width:20px;height:20px;fill:currentColor;stroke:none;margin-left:2px}
.listen-play.playing{animation:none;opacity:.8}
.listen-wave{display:flex;align-items:center;gap:4px;height:40px;flex:1}
.listen-wave i{flex:1;max-width:5px;border-radius:3px;background:var(--line-strong);height:30%}
.listen-wave.playing i{animation:wave 1s ease-in-out infinite}
.listen-wave i:nth-child(2n){height:60%}
.listen-wave i:nth-child(3n){height:85%}
.listen-wave i:nth-child(4n){height:45%}
@keyframes wave{0%,100%{transform:scaleY(.55)}50%{transform:scaleY(1)}}
.listen-rate{display:flex;gap:4px;padding:3px;border-radius:8px;background:var(--panel);border:1px solid var(--line)}
.listen-rate button{font-size:10.5px;padding:3px 8px;border-radius:6px;color:var(--text-3)}
.listen-rate button.on{background:var(--a1-soft);color:var(--a1);font-weight:700}
.listen-q{font-size:14px;font-weight:650;margin-bottom:13px;line-height:1.7}
.listen-opts{display:grid;gap:9px}
.listen-opt{padding:12px 15px;border-radius:10px;border:1px solid var(--line);background:var(--panel-2);font-size:13px;text-align:left;transition:.14s;display:flex;gap:10px;align-items:center}
.listen-opt:hover:not(.dis){border-color:rgba(94,234,212,.45);background:var(--a1-soft)}
.listen-opt .lo-key{width:22px;height:22px;border-radius:6px;background:var(--panel);display:grid;place-items:center;font-size:10.5px;font-weight:700;color:var(--text-3);flex:none}
.listen-opt.correct{border-color:rgba(52,211,153,.55);background:rgba(52,211,153,.1)}
.listen-opt.correct .lo-key{background:rgba(52,211,153,.2);color:var(--ok)}
.listen-opt.wrong{border-color:rgba(251,113,133,.5);background:rgba(251,113,133,.09)}
.listen-opt.wrong .lo-key{background:rgba(251,113,133,.18);color:var(--bad)}
.listen-reveal{font-size:12.5px;color:var(--text-2);line-height:1.8;margin-top:14px;padding:12px 14px;border-radius:9px;background:var(--panel);border:1px dashed var(--line);display:none}
.listen-reveal.show{display:block}
.listen-reveal b{color:var(--a1)}

/* =========================================================
   5. 学习进度
   ========================================================= */
.progress-hero{
  display:grid;grid-template-columns:auto 1fr auto;gap:28px;align-items:center;
  padding:26px 30px;border-radius:20px;border:1px solid var(--line);
  background:radial-gradient(620px 260px at 8% 0%,rgba(94,234,212,.16),transparent 62%),radial-gradient(500px 240px at 92% 100%,rgba(129,140,248,.16),transparent 64%),linear-gradient(120deg,var(--bg-3),rgba(10,18,32,.3));
  margin-bottom:18px;
}
html[data-theme="light"] .progress-hero{background:radial-gradient(620px 260px at 8% 0%,rgba(13,148,136,.10),transparent 62%),radial-gradient(500px 240px at 92% 100%,rgba(99,102,241,.08),transparent 64%),linear-gradient(120deg,#fff,#f4f8ff)}
.ph-ring{width:120px;height:120px;position:relative}
.ph-ring svg{width:120px;height:120px;transform:rotate(-90deg)}
.ph-ring .track{fill:none;stroke:var(--line);stroke-width:9}
.ph-ring .value{fill:none;stroke:url(#ringGrad);stroke-width:9;stroke-linecap:round}
.ph-ring .center{position:absolute;inset:0;display:grid;place-content:center;text-align:center}
.ph-ring b{font-size:25px;font-weight:780;line-height:1.1;font-variant-numeric:tabular-nums}
.ph-ring span{font-size:10px;color:var(--text-3)}
.ph-copy h3{font-size:21px;font-weight:750;letter-spacing:-.2px}
.ph-copy p{font-size:12.5px;color:var(--text-3);margin-top:5px;line-height:1.7}
.ph-chips{display:flex;gap:8px;margin-top:12px;flex-wrap:wrap}
.ph-level{padding:14px 18px;border-radius:14px;border:1px solid var(--line);background:var(--panel);text-align:center;min-width:150px}
.ph-level .lvl-badge{font-size:11px;color:var(--a2);letter-spacing:1.4px;font-weight:700}
.ph-level b{display:block;font-size:22px;font-weight:770;margin-top:3px;font-variant-numeric:tabular-nums}
.ph-level span{font-size:10.5px;color:var(--text-3)}
.ph-level .bar{margin-top:9px}

.stat-row{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-bottom:18px}
.stat-box{padding:17px 18px;border-radius:15px;border:1px solid var(--line);background:var(--panel)}
.stat-box .sb-head{display:flex;align-items:center;gap:7px;font-size:11.5px;color:var(--text-3)}
.stat-box .sb-head svg{width:14px;height:14px}
.stat-box b{display:block;font-size:24px;font-weight:770;margin-top:6px;font-variant-numeric:tabular-nums;line-height:1.2}
.stat-box small{font-size:10.5px;color:var(--text-3)}

.progress-grid{display:grid;grid-template-columns:1.5fr 1fr;gap:18px;margin-bottom:18px}
.chart-svg{width:100%;height:210px}
.chart-svg text{font-size:9px;fill:var(--text-3)}
.chart-svg .grid-line{stroke:var(--line);stroke-width:1}
.chart-svg .area{fill:url(#areaGrad2)}
.chart-svg .line{fill:none;stroke:url(#lineGrad2);stroke-width:2.6;stroke-linecap:round;stroke-linejoin:round}
.chart-svg .dot{fill:var(--a1);stroke:var(--bg-2);stroke-width:2}

.mastery-list{display:grid;gap:14px}
.mastery-row{display:grid;grid-template-columns:76px 1fr 42px;align-items:center;gap:10px}
.mastery-row .mr-name{font-size:12px;color:var(--text-2);display:flex;align-items:center;gap:7px}
.mastery-row .mr-dot{width:7px;height:7px;border-radius:2px;flex:none}
.mastery-row .bar{height:7px}
.mastery-row .mr-val{font-size:11px;color:var(--text-3);text-align:right;font-variant-numeric:tabular-nums}

.heatmap-card{overflow-x:auto}
.heatmap{display:flex;gap:4px;min-width:600px}
.hm-weeks{display:flex;gap:4px}
.hm-col{display:grid;grid-template-rows:repeat(7,1fr);gap:4px}
.hm-cell{width:12px;height:12px;border-radius:3px;background:var(--panel-2);border:1px solid var(--line)}
.hm-cell.l1{background:rgba(94,234,212,.22);border-color:rgba(94,234,212,.24)}
.hm-cell.l2{background:rgba(94,234,212,.45);border-color:rgba(94,234,212,.4)}
.hm-cell.l3{background:rgba(94,234,212,.7);border-color:rgba(94,234,212,.6)}
.hm-cell.l4{background:var(--a1);border-color:var(--a1)}
.hm-months{display:flex;justify-content:space-between;font-size:10px;color:var(--text-3);margin-bottom:8px;min-width:600px}
.hm-legend{display:flex;align-items:center;gap:5px;font-size:10.5px;color:var(--text-3);margin-top:10px;justify-content:flex-end}

.activity-list{display:grid;gap:0}
.act-item{display:flex;gap:12px;padding:10px 0;border-bottom:1px solid var(--line)}
.act-item:last-child{border-bottom:none}
.act-dot{width:26px;height:26px;border-radius:8px;display:grid;place-items:center;flex:none;font-size:11px}
.act-dot svg{width:13px;height:13px}
.act-text{flex:1;min-width:0}
.act-text b{font-size:12.5px;font-weight:650;display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.act-text span{font-size:10.5px;color:var(--text-3)}
.act-xp{font-size:11px;color:var(--warm);font-weight:700;white-space:nowrap}

.weak-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.weak-card{padding:13px 14px;border-radius:11px;border:1px solid var(--line);background:var(--panel-2)}
.weak-card .wc-top{display:flex;justify-content:space-between;font-size:11.5px;margin-bottom:6px}
.weak-card .wc-top span{color:var(--text-3)}
.weak-card b{font-size:12.5px;font-weight:650;display:block;margin-bottom:5px}
.weak-card p{font-size:10.5px;color:var(--text-3);line-height:1.6}

/* =========================================================
   6. 学习路径
   ========================================================= */
.path-hero{
  border-radius:20px;padding:28px 30px;border:1px solid var(--line);margin-bottom:18px;
  background:radial-gradient(560px 260px at 88% 6%,rgba(129,140,248,.22),transparent 64%),radial-gradient(420px 220px at 4% 92%,rgba(94,234,212,.14),transparent 62%),linear-gradient(122deg,#0b1526,#101a2f);
  display:grid;grid-template-columns:1fr auto;gap:22px;align-items:center;
}
html[data-theme="light"] .path-hero{background:radial-gradient(560px 260px at 88% 6%,rgba(99,102,241,.10),transparent 64%),radial-gradient(420px 220px at 4% 92%,rgba(13,148,136,.08),transparent 62%),linear-gradient(122deg,#fff,#f5f9ff)}
.path-hero h2{font-size:clamp(21px,2.4vw,27px);font-weight:770;letter-spacing:-.3px;margin:9px 0 8px}
.path-hero p{font-size:12.5px;color:var(--text-2);line-height:1.8;max-width:600px}
.path-hero-actions{display:flex;gap:10px;margin-top:16px;flex-wrap:wrap}
.path-wheel{width:150px;height:150px;position:relative;flex:none}
.path-wheel svg{width:150px;height:150px;transform:rotate(-90deg)}
.path-wheel .track{fill:none;stroke:rgba(255,255,255,.09);stroke-width:10}
html[data-theme="light"] .path-wheel .track{stroke:rgba(19,40,73,.08)}
.path-wheel .seg{fill:none;stroke-width:10;stroke-linecap:round}
.path-wheel .center{position:absolute;inset:0;display:grid;place-content:center;text-align:center}
.path-wheel .center b{font-size:24px;font-weight:770;line-height:1.15}
.path-wheel .center span{font-size:10px;color:var(--text-3)}

.path-layout{display:grid;grid-template-columns:1.6fr 1fr;gap:18px;align-items:start}
.week-tabs{display:flex;gap:7px;flex-wrap:wrap;margin-bottom:16px}
.week-tab{padding:7px 13px;border-radius:9px;border:1px solid var(--line);font-size:11.5px;color:var(--text-2);font-weight:600}
.week-tab.on{background:var(--a1-soft);border-color:rgba(94,234,212,.4);color:var(--a1)}
.week-tab small{display:block;font-size:9.5px;color:var(--text-3);font-weight:500}
.path-timeline{display:grid;gap:0}
.path-step{display:grid;grid-template-columns:42px 1fr;gap:14px;position:relative;padding-bottom:18px}
.path-step:last-child{padding-bottom:0}
.path-step::before{content:"";position:absolute;left:20px;top:42px;bottom:0;width:1.5px;background:var(--line);z-index:0}
.path-step:last-child::before{display:none}
.ps-node{
  width:42px;height:42px;border-radius:13px;display:grid;place-items:center;z-index:1;
  background:var(--panel-2);border:1px solid var(--line);color:var(--text-3);font-size:12px;font-weight:750;
}
.ps-node.done{background:rgba(52,211,153,.13);border-color:rgba(52,211,153,.38);color:var(--ok)}
.ps-node.current{background:linear-gradient(140deg,var(--a1),var(--a2));border-color:transparent;color:#05121f;box-shadow:0 0 0 4px rgba(94,234,212,.12)}
.ps-body{
  padding:15px 17px;border-radius:13px;border:1px solid var(--line);background:var(--panel);
}
.ps-body.current{border-color:rgba(94,234,212,.35);background:linear-gradient(120deg,var(--a1-soft),transparent)}
.ps-body .ps-top{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:5px}
.ps-body .ps-top b{font-size:13.5px;font-weight:700}
.ps-body .ps-top .tag{font-size:9.5px}
.ps-body p{font-size:11.5px;color:var(--text-3);line-height:1.7}
.ps-body .ps-meta{display:flex;align-items:center;gap:12px;font-size:10.5px;color:var(--text-3);margin-top:9px}
.ps-body .ps-meta span{display:flex;align-items:center;gap:4px}
.ps-body .ps-meta svg{width:12px;height:12px}
.ps-body .ps-meta .go{margin-left:auto;color:var(--a1);font-weight:650;display:flex;align-items:center;gap:3px}

.path-side{display:grid;gap:16px}
.rec-card{padding:16px;border-radius:13px;border:1px solid var(--line);background:var(--panel-2);display:grid;gap:8px}
.rec-card .rc-head{display:flex;align-items:center;gap:8px;font-size:11px;color:var(--text-3)}
.rec-card .rc-head svg{width:14px;height:14px;color:var(--a2)}
.rec-card b{font-size:13px;font-weight:700}
.rec-card p{font-size:11px;color:var(--text-3);line-height:1.7}
.rec-reason{display:flex;gap:7px;font-size:10.5px;color:var(--a1);padding:7px 9px;border-radius:7px;background:var(--a1-soft);line-height:1.6}
.rec-reason svg{width:13px;height:13px;flex:none;margin-top:1px}
.diagnose-list{display:grid;gap:8px}
.dg-row{display:flex;align-items:center;justify-content:space-between;font-size:11.5px;padding:8px 9px;border-radius:8px;background:var(--panel)}
.dg-row span{color:var(--text-3)}
.dg-row b{font-weight:650}

/* =========================================================
   7. 社区
   ========================================================= */
.community-layout{display:grid;grid-template-columns:1fr 312px;gap:18px;align-items:start}
.community-main{display:grid;gap:16px}
.composer{padding:18px 20px}
.composer-head{display:flex;align-items:center;gap:11px;margin-bottom:12px}
.composer-head b{font-size:13px;font-weight:650}
.composer-head span{font-size:10.5px;color:var(--text-3)}
.composer textarea{
  width:100%;min-height:76px;border:1px solid var(--line);border-radius:11px;background:var(--panel-2);
  padding:12px 13px;font-size:13px;outline:none;resize:vertical;line-height:1.7;
}
.composer textarea:focus{border-color:rgba(94,234,212,.4)}
.composer-foot{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-top:11px;flex-wrap:wrap}
.composer-tags{display:flex;gap:6px;flex-wrap:wrap}
.composer-tags button{font-size:10.5px;padding:4px 9px;border-radius:999px;border:1px solid var(--line);color:var(--text-3)}
.composer-tags button.on{border-color:rgba(94,234,212,.4);background:var(--a1-soft);color:var(--a1)}

.feed-filter{display:flex;gap:7px;flex-wrap:wrap}
.feed-filter button{font-size:11.5px;padding:6px 12px;border-radius:999px;border:1px solid var(--line);color:var(--text-2)}
.feed-filter button.on{background:var(--a2-soft);border-color:rgba(129,140,248,.4);color:var(--a2)}

.post{padding:19px 21px}
.post-head{display:flex;align-items:center;gap:11px;margin-bottom:11px}
.post-author{flex:1;min-width:0}
.post-author b{font-size:12.5px;font-weight:650;display:flex;align-items:center;gap:6px}
.post-author span{font-size:10.5px;color:var(--text-3)}
.post-body{font-size:13px;color:var(--text-2);line-height:1.85;white-space:pre-wrap;word-break:break-word}
.post-body strong{color:var(--text)}
.post-tags{display:flex;gap:6px;flex-wrap:wrap;margin-top:11px}
.post-foot{display:flex;align-items:center;gap:16px;margin-top:13px;padding-top:12px;border-top:1px solid var(--line)}
.post-act{display:flex;align-items:center;gap:6px;font-size:11.5px;color:var(--text-3)}
.post-act svg{width:15px;height:15px}
.post-act:hover{color:var(--text)}
.post-act.liked{color:var(--bad)}
.post-act.liked svg{fill:rgba(251,113,133,.25)}
.post-act.my{margin-left:auto;color:var(--text-3)}
.post-comments{display:grid;gap:9px;margin-top:12px;padding-top:12px;border-top:1px dashed var(--line)}
.comment{display:flex;gap:9px}
.comment-body{flex:1;min-width:0}
.comment-body b{font-size:11.5px;font-weight:650}
.comment-body p{font-size:12px;color:var(--text-2);line-height:1.7;margin-top:1px}
.comment-body span{font-size:10px;color:var(--text-3)}
.comment-form{display:flex;gap:8px;margin-top:4px}
.comment-form input{flex:1;height:34px;padding:0 11px;border-radius:8px;background:var(--panel-2);border:1px solid var(--line);font-size:12px;outline:none}
.comment-form input:focus{border-color:rgba(94,234,212,.4)}
.comment-form button{width:34px;height:34px;border-radius:8px;display:grid;place-items:center;background:var(--a1-soft);color:var(--a1)}
.comment-form button:hover{background:rgba(94,234,212,.22)}

.community-side{display:grid;gap:16px;position:sticky;top:calc(var(--topbar-h) + 16px)}
.side-card{padding:17px}
.side-card h4{font-size:12.5px;font-weight:700;margin-bottom:12px;display:flex;align-items:center;gap:7px}
.side-card h4 svg{width:14px;height:14px;color:var(--a1)}
.topic-row{display:flex;align-items:center;gap:9px;padding:6px 0;font-size:11.5px;color:var(--text-2);cursor:pointer}
.topic-row:hover{color:var(--a1)}
.topic-row .t-idx{font-size:10px;color:var(--text-3);width:14px;font-variant-numeric:tabular-nums}
.topic-row .t-count{margin-left:auto;font-size:10px;color:var(--text-3)}
.member-row{display:flex;align-items:center;gap:9px;padding:6px 0}
.member-row .m-name{flex:1;min-width:0;font-size:11.5px}
.member-row .m-name b{display:block;font-weight:650;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.member-row .m-name span{font-size:9.5px;color:var(--text-3)}
.member-row .m-xp{font-size:10px;color:var(--warm);font-variant-numeric:tabular-nums}
.group-row{display:flex;align-items:center;gap:9px;padding:8px 0;font-size:11.5px}
.group-ic{width:28px;height:28px;border-radius:8px;display:grid;place-items:center;background:var(--panel-2);color:var(--text-2);font-size:11px;font-weight:750}
.group-row b{display:block;font-size:11.5px;font-weight:650}
.group-row span{font-size:9.5px;color:var(--text-3)}

/* =========================================================
   8. 成就中心
   ========================================================= */
.level-banner{
  display:grid;grid-template-columns:auto 1fr auto;gap:24px;align-items:center;padding:24px 28px;border-radius:20px;
  border:1px solid var(--line);margin-bottom:18px;
  background:radial-gradient(480px 220px at 94% 10%,rgba(251,191,36,.14),transparent 62%),radial-gradient(420px 200px at 2% 100%,rgba(129,140,248,.16),transparent 62%),linear-gradient(120deg,var(--bg-3),rgba(10,18,32,.3));
}
html[data-theme="light"] .level-banner{background:radial-gradient(480px 220px at 94% 10%,rgba(251,191,36,.10),transparent 62%),radial-gradient(420px 200px at 2% 100%,rgba(99,102,241,.08),transparent 62%),linear-gradient(120deg,#fff,#f6f9ff)}
.level-emblem{width:82px;height:82px;border-radius:22px;display:grid;place-items:center;background:linear-gradient(140deg,var(--a1-soft),var(--a2-soft));border:1px solid rgba(94,234,212,.3);position:relative}
.level-emblem svg{width:38px;height:38px;color:var(--a1)}
.level-emblem .lv{position:absolute;bottom:-9px;left:50%;transform:translateX(-50%);font-size:10px;font-weight:750;background:var(--bg-2);border:1px solid var(--line);padding:2px 9px;border-radius:999px;color:var(--a1);white-space:nowrap}
.lb-copy h3{font-size:20px;font-weight:760}
.lb-copy p{font-size:12px;color:var(--text-3);margin-top:4px}
.lb-bar{display:flex;align-items:center;gap:11px;margin-top:11px}
.lb-bar .bar{width:300px;max-width:100%}
.lb-bar span{font-size:10.5px;color:var(--text-3);font-variant-numeric:tabular-nums}
.lb-rank{padding:14px 20px;border-radius:13px;background:var(--panel);border:1px solid var(--line);text-align:center;min-width:118px}
.lb-rank b{font-size:26px;font-weight:780;display:block;line-height:1.2;color:var(--warm)}
.lb-rank span{font-size:10.5px;color:var(--text-3)}

.ach-grid{display:grid;grid-template-columns:1.65fr 1fr;gap:18px;align-items:start}
.badge-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.badge{
  padding:15px 12px;border-radius:13px;border:1px solid var(--line);background:var(--panel);
  text-align:center;position:relative;transition:.16s;
}
.badge.locked{opacity:.55}
.badge.locked .badge-ic{filter:grayscale(1);background:var(--panel-2);color:var(--text-3)}
.badge.unlocked{border-color:rgba(94,234,212,.3);background:linear-gradient(155deg,var(--a1-soft),transparent 70%)}
.badge.unlocked:hover{transform:translateY(-2px)}
.badge-ic{width:44px;height:44px;border-radius:13px;margin:0 auto 9px;display:grid;place-items:center;background:var(--a2-soft);color:var(--a2)}
.badge-ic svg{width:21px;height:21px}
.badge b{display:block;font-size:11.5px;font-weight:650;line-height:1.4}
.badge span{display:block;font-size:9.5px;color:var(--text-3);margin-top:3px;line-height:1.4}
.badge .b-check{position:absolute;top:8px;right:8px;width:15px;height:15px;border-radius:50%;background:var(--ok);color:#04120d;display:grid;place-items:center}
.badge .b-check svg{width:9px;height:9px;stroke-width:3}

.quest-list{display:grid;gap:10px}
.quest{display:flex;align-items:center;gap:11px;padding:11px 12px;border-radius:11px;border:1px solid var(--line);background:var(--panel-2)}
.quest .q-ic{width:30px;height:30px;border-radius:9px;display:grid;place-items:center;background:var(--a2-soft);color:var(--a2);flex:none}
.quest .q-ic svg{width:15px;height:15px}
.quest-main{flex:1;min-width:0}
.quest-main b{display:block;font-size:12px;font-weight:650}
.quest-main span{font-size:10px;color:var(--text-3)}
.quest-main .bar{margin-top:5px;height:4px}
.quest-claim{font-size:10px;color:var(--warm);font-weight:700;white-space:nowrap}
.quest.done .quest-claim{color:var(--ok)}

.leaderboard{display:grid;gap:2px}
.lb-row{display:flex;align-items:center;gap:10px;padding:8px 9px;border-radius:9px;font-size:11.5px}
.lb-row.me{background:var(--a1-soft);border:1px solid rgba(94,234,212,.25)}
.lb-pos{width:20px;font-size:10.5px;color:var(--text-3);font-weight:700;text-align:center;font-variant-numeric:tabular-nums}
.lb-pos.top1{color:var(--warm)}
.lb-pos.top2{color:#cbd5e1}
.lb-pos.top3{color:#d9a066}
.lb-row .lb-name{flex:1;min-width:0;font-weight:650;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.lb-row .lb-name span{font-weight:500;color:var(--text-3);font-size:9.5px;margin-left:4px}
.lb-row .lb-xp{font-size:10.5px;color:var(--text-3);font-variant-numeric:tabular-nums}

/* =========================================================
   9. 个人中心
   ========================================================= */
.profile-grid{display:grid;grid-template-columns:1fr 1.25fr;gap:18px;align-items:start}
.profile-card{padding:26px;text-align:center;position:relative;overflow:hidden}
.profile-card::before{content:"";position:absolute;left:0;right:0;top:0;height:88px;background:linear-gradient(120deg,var(--a1-soft),var(--a2-soft));opacity:.7}
.profile-avatar{
  width:76px;height:76px;border-radius:23px;margin:18px auto 12px;display:grid;place-items:center;
  font-size:28px;font-weight:780;color:#06121f;background:linear-gradient(140deg,var(--a1),var(--a2));
  position:relative;border:3px solid var(--bg-2);box-shadow:var(--shadow-sm);
}
.profile-card h3{font-size:18px;font-weight:750;position:relative}
.profile-card .pc-mail{font-size:11.5px;color:var(--text-3);margin-top:3px}
.profile-card .pc-joined{font-size:10.5px;color:var(--text-3);margin-top:9px}
.pc-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-top:18px;position:relative}
.pc-stats div{padding:11px 6px;border-radius:10px;background:var(--panel-2);border:1px solid var(--line)}
.pc-stats b{display:block;font-size:17px;font-weight:770;font-variant-numeric:tabular-nums}
.pc-stats span{font-size:9.5px;color:var(--text-3)}
.settings-card{padding:22px 24px}
.settings-card h3{font-size:15px;font-weight:720;margin-bottom:4px}
.settings-card > p{font-size:11.5px;color:var(--text-3);margin-bottom:16px}
.setting-row{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:13px 0;border-bottom:1px solid var(--line)}
.setting-row:last-child{border-bottom:none}
.setting-info b{display:block;font-size:12.5px;font-weight:650}
.setting-info span{font-size:10.5px;color:var(--text-3)}
.setting-ctrl{flex:none;display:flex;align-items:center;gap:8px}
.setting-ctrl .input{height:34px;font-size:12px;width:150px;padding:0 10px}
.theme-switch{display:flex;gap:3px;padding:3px;border-radius:9px;background:var(--panel-2);border:1px solid var(--line)}
.theme-switch button{display:flex;align-items:center;gap:5px;font-size:10.5px;padding:5px 9px;border-radius:6px;color:var(--text-3)}
.theme-switch button.on{background:var(--bg-3);color:var(--text);box-shadow:var(--shadow-sm)}
.theme-switch svg{width:13px;height:13px}
.danger-zone{margin-top:8px}
.pref-select{width:130px}

/* =========================================================
   响应式页面
   ========================================================= */
@media (max-width:1200px){
  .subject-grid{grid-template-columns:repeat(3,1fr)}
  .mode-grid{grid-template-columns:repeat(2,1fr)}
  .badge-grid{grid-template-columns:repeat(3,1fr)}
  .course-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:1080px){
  .dash-grid{grid-template-columns:1fr}
  .progress-grid{grid-template-columns:1fr}
  .progress-hero{grid-template-columns:auto 1fr}
  .progress-hero .ph-level{display:none}
  .ach-grid{grid-template-columns:1fr}
  .community-layout{grid-template-columns:1fr}
  .community-side{grid-template-columns:1fr 1fr;display:grid;position:static}
  .path-layout{grid-template-columns:1fr}
  .detail-grid{grid-template-columns:1fr}
  .lesson-layout{grid-template-columns:1fr}
  .lesson-side{position:static;grid-template-columns:1fr 1fr}
  .profile-grid{grid-template-columns:1fr}
  .kpi-grid{grid-template-columns:repeat(2,1fr)}
  .lab-hero{grid-template-columns:1fr}
  .lab-stats{justify-content:flex-start}
}
@media (max-width:900px){
  .stat-row{grid-template-columns:repeat(2,1fr)}
  .level-banner{grid-template-columns:auto 1fr}
  .level-banner .lb-rank{display:none}
}
@media (max-width:760px){
  .welcome-hero{grid-template-columns:1fr;padding:22px}
  .wh-side{display:none}
  .catalog-hero,.course-detail-hero,.lab-hero,.path-hero{grid-template-columns:1fr;padding:22px}
  .cd-ring,.path-wheel{display:none}
  .subject-grid{grid-template-columns:repeat(2,1fr)}
  .course-grid{grid-template-columns:1fr}
  .mode-grid{grid-template-columns:repeat(2,1fr)}
  .grid-2,.grid-3,.grid-4{grid-template-columns:1fr}
  .kpi-grid{grid-template-columns:1fr 1fr;gap:10px}
  .kpi{padding:13px}
  .kpi b{font-size:17px}
  .lesson-side{grid-template-columns:1fr}
  .lesson-content{padding:20px}
  .lab-panel{padding:18px}
  .flashcard{height:260px}
  .flash-word{font-size:34px}
  .flash-meaning{font-size:22px}
  .grammar-opts{grid-template-columns:1fr}
  .speak-target{font-size:20px}
  .badge-grid{grid-template-columns:repeat(2,1fr)}
  .community-side{grid-template-columns:1fr}
  .weak-grid{grid-template-columns:1fr}
  .progress-hero{grid-template-columns:1fr;text-align:center}
  .ph-ring{margin:0 auto}
  .ph-copy{text-align:center}
  .ph-chips{justify-content:center}
  .detail-side{grid-template-columns:1fr}
  .settings-card{padding:18px}
  .setting-row{flex-wrap:wrap}
  .filter-search{margin-left:0;width:100%}
  .filter-search input{width:100%}
  .comment-form input{font-size:11px}
}
@media (max-width:520px){
  .subject-grid{grid-template-columns:1fr 1fr;gap:9px}
  .subject-card{padding:13px}
  .mode-grid{grid-template-columns:1fr}
  .stat-row{grid-template-columns:1fr 1fr}
  .badge-grid{grid-template-columns:1fr 1fr}
  .flash-actions .btn-rate{max-width:none;flex:1 1 40%}
  .lab-panel-head{align-items:flex-start}
  .lab-stats{width:100%}
  .lab-stat{flex:1;width:auto}
  .listen-player{gap:12px;padding:14px}
  .topbar-right .streak-pill{display:none}
}