/* ============================================================
   学习医生 · 独立学习模板 — 设计系统
   橙金 #FF8C00 · 米白/深棕双主题 · 温润老师的工作台
   视觉主线：书卷气 × 教练感 → 衬线书名体标题 + 无衬线正文
   ============================================================ */

/* ---------- 主题变量 ---------- */
:root{
  --font-display:'Songti SC','STSong','SimSun','Source Han Serif SC','Noto Serif SC',serif;
  --font-body:'PingFang SC','Microsoft YaHei','Source Han Sans SC','Noto Sans SC',-apple-system,'Segoe UI',sans-serif;

  --primary:#FF8C00;
  --primary-strong:#F07600;
  --accent:#FFD700;
  --brown:#8B4513;

  --bg:#FFF8F0;
  --bg-2:#FFEFDC;
  --surface:#FFFFFF;
  --surface-2:#FFFBF3;
  --surface-3:#FFF1DE;
  --ink:#3B2614;
  --ink-soft:#6C5540;
  --muted:#9A846F;
  --line:rgba(139,69,19,.14);
  --line-strong:rgba(139,69,19,.26);

  --ok:#2E9E5B;
  --ok-bg:#E9F6EE;
  --warn:#C9820F;
  --warn-bg:#FBF3E0;
  --danger:#C2432B;
  --danger-bg:#FBEBE6;

  --card-r:12px;
  --btn-r:8px;
  --shadow-sm:0 1px 2px rgba(80,45,10,.06),0 4px 14px rgba(80,45,10,.05);
  --shadow-md:0 6px 24px rgba(80,45,10,.10),0 2px 6px rgba(80,45,10,.06);
  --shadow-lg:0 18px 50px rgba(60,30,5,.18);
  --ring:0 0 0 3px rgba(255,140,0,.25);

  --topbar-h:64px;
  --sidebar-w:264px;
  --ease:cubic-bezier(.22,.68,.32,1);
}
[data-theme="dark"]{
  --primary:#FFA73D;
  --primary-strong:#FF8C00;
  --accent:#FFD966;
  --brown:#D07A36;

  --bg:#2A1A0A;
  --bg-2:#351F0E;
  --surface:#3B2310;
  --surface-2:#402A15;
  --surface-3:#4A3018;
  --ink:#F6E9D6;
  --ink-soft:#DEC6A9;
  --muted:#A88F74;
  --line:rgba(255,202,120,.14);
  --line-strong:rgba(255,202,120,.28);

  --ok:#5FC286;
  --ok-bg:rgba(58,168,108,.16);
  --warn:#E0A63E;
  --warn-bg:rgba(224,166,62,.16);
  --danger:#F0785E;
  --danger-bg:rgba(240,120,94,.16);

  --shadow-sm:0 1px 2px rgba(0,0,0,.3),0 4px 14px rgba(0,0,0,.25);
  --shadow-md:0 6px 24px rgba(0,0,0,.35),0 2px 6px rgba(0,0,0,.3);
  --shadow-lg:0 18px 50px rgba(0,0,0,.45);
  --ring:0 0 0 3px rgba(255,167,61,.3);
}

/* ---------- 基础 ---------- */
*{box-sizing:border-box;margin:0;padding:0}
[hidden]{display:none!important}
html{-webkit-text-size-adjust:100%}
body{
  font-family:var(--font-body);
  background:var(--bg);
  color:var(--ink);
  line-height:1.6;
  min-height:100vh;
  transition:background .4s var(--ease),color .3s var(--ease);
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}
input,textarea,select{font-family:inherit;color:inherit}
img{max-width:100%;display:block}
::selection{background:rgba(255,140,0,.28)}
h1,h2,h3,h4{font-family:var(--font-display);font-weight:700;line-height:1.3}

/* 全局氛围背景 */
.app-ambient{
  position:fixed;inset:0;z-index:-1;pointer-events:none;
  background:
    radial-gradient(1200px 600px at 85% -10%, rgba(255,140,0,.10), transparent 60%),
    radial-gradient(900px 500px at -10% 110%, rgba(255,215,0,.08), transparent 55%),
    var(--bg);
}
.app-ambient::before{
  content:"";position:absolute;inset:0;opacity:.5;
  background-image:radial-gradient(rgba(139,69,19,.10) 1px, transparent 1px);
  background-size:26px 26px;
  mask-image:radial-gradient(1000px 500px at 50% 0, #000, transparent 80%);
}

/* 滚动条 */
*::-webkit-scrollbar{width:10px;height:10px}
*::-webkit-scrollbar-thumb{background:rgba(139,69,19,.22);border-radius:20px;border:3px solid transparent;background-clip:content-box}
*::-webkit-scrollbar-track{background:transparent}

/* ---------- 布局骨架 ---------- */
.app{min-height:100vh;display:flex;flex-direction:column}
.layout{flex:1;display:flex;min-height:0}
.view{
  flex:1;min-width:0;
  padding:28px 34px 60px;
  animation:viewIn .45s var(--ease) both;
}
@keyframes viewIn{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}

.page-head{
  margin-bottom:22px;animation:rise .5s var(--ease) both;
}
.page-head__kicker{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--primary-strong);font-weight:600;margin-bottom:8px;
}
.page-head__kicker::before{content:"";width:22px;height:2px;background:var(--primary);border-radius:2px}
.page-head h1{font-size:30px;font-weight:900;letter-spacing:.5px}
.page-head p{color:var(--ink-soft);margin-top:6px;max-width:640px}
.page-head__row{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;flex-wrap:wrap}

.stagger [data-t]{animation:rise .5s var(--ease) both}
@keyframes rise{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}

/* ============================================================
   顶部导航
   ============================================================ */
.topbar{
  position:sticky;top:0;z-index:50;
  height:var(--topbar-h);
  background:color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.topbar__inner{max-width:1440px;margin:0 auto;height:100%;display:flex;align-items:center;gap:16px;padding:0 22px}
.topbar__burger{display:none;width:40px;height:40px;border-radius:10px;flex-direction:column;align-items:center;justify-content:center;gap:4px;transition:background .2s}
.topbar__burger span{width:18px;height:2px;background:var(--ink);border-radius:2px;transition:.3s var(--ease)}
.topbar__burger:hover{background:var(--surface-3)}

.brand{display:flex;align-items:center;gap:11px;flex:none}
.brand__mark{
  width:42px;height:42px;border-radius:12px;flex:none;
  display:grid;place-items:center;font-family:var(--font-display);
  font-weight:900;font-size:22px;color:#fff;
  background:linear-gradient(135deg,var(--primary),#FF6A00);
  box-shadow:0 6px 16px rgba(255,106,0,.35),inset 0 -2px 4px rgba(0,0,0,.14);
}
.brand__text{display:flex;flex-direction:column;line-height:1.2}
.brand__text b{font-family:var(--font-display);font-size:18px;letter-spacing:1px}
.brand__text small{font-size:10.5px;color:var(--muted);letter-spacing:.14em}

.topbar__search{position:relative;flex:1;max-width:520px;margin:0 auto}
.topbar__search svg{width:17px;height:17px;position:absolute;left:14px;top:50%;transform:translateY(-50%);color:var(--muted);pointer-events:none}
.topbar__search input{
  width:100%;height:40px;border-radius:40px;border:1px solid var(--line);
  background:var(--surface);padding:0 16px 0 42px;font-size:14px;outline:none;
  transition:.25s;color:var(--ink);
}
.topbar__search input:focus{border-color:var(--primary);box-shadow:var(--ring)}
.topbar__right{display:flex;align-items:center;gap:10px;flex:none}
.icon-btn{width:40px;height:40px;border-radius:10px;display:grid;place-items:center;color:var(--ink-soft);transition:.2s}
.icon-btn:hover{background:var(--surface-3);color:var(--ink)}
.icon-btn svg{width:20px;height:20px}
.icon-sun{display:none}
[data-theme="dark"] .icon-moon{display:none}
[data-theme="dark"] .icon-sun{display:block}

.user-chip{position:relative;display:flex;align-items:center;gap:10px;padding:5px 12px 5px 6px;border-radius:30px;border:1px solid var(--line);background:var(--surface);transition:.2s;cursor:pointer}
.user-chip:hover{border-color:var(--primary);box-shadow:var(--shadow-sm)}
.user-chip__avatar{width:32px;height:32px;border-radius:50%;display:grid;place-items:center;background:linear-gradient(135deg,var(--brown),var(--primary));color:#fff;font-family:var(--font-display);font-weight:700}
.user-chip__meta{display:flex;flex-direction:column;line-height:1.15;text-align:left}
.user-chip__meta b{font-size:13px}
.user-chip__meta small{font-size:11px;color:var(--muted)}
.user-chip__caret{width:14px;height:14px;color:var(--muted)}
.user-menu{
  position:absolute;right:0;top:calc(100% + 10px);min-width:190px;
  background:var(--surface);border:1px solid var(--line);border-radius:14px;
  box-shadow:var(--shadow-md);padding:8px;z-index:60;transform-origin:top right;
  animation:menuIn .22s var(--ease) both;
}
@keyframes menuIn{from{opacity:0;transform:translateY(-6px) scale(.97)}to{opacity:1;transform:none}}
.user-menu a,.user-menu button{display:flex;width:100%;align-items:center;gap:9px;padding:9px 12px;border-radius:9px;font-size:13.5px;color:var(--ink-soft);transition:.15s;text-align:left}
.user-menu a:hover,.user-menu button:hover{background:var(--surface-3);color:var(--ink)}
.user-menu button{color:var(--danger)}

.search-pop{
  position:absolute;top:calc(100% + 8px);width:100%;max-height:420px;overflow:auto;
  background:var(--surface);border:1px solid var(--line);border-radius:14px;
  box-shadow:var(--shadow-md);padding:8px;z-index:60;animation:menuIn .2s var(--ease) both;
}
.search-pop__group{margin:6px 2px}
.search-pop__group>label{display:block;font-size:11px;color:var(--muted);letter-spacing:.12em;padding:4px 10px}
.search-pop__item{display:flex;align-items:center;gap:11px;padding:9px 10px;border-radius:9px;cursor:pointer;transition:.15s}
.search-pop__item:hover{background:var(--surface-3)}
.search-pop__item b{font-size:13.5px;display:block}
.search-pop__item small{font-size:11.5px;color:var(--muted)}
.search-pop__tag{font-size:10px;color:var(--primary-strong);border:1px solid var(--line-strong);border-radius:6px;padding:1px 6px;white-space:nowrap}

/* ---------- 侧栏 ---------- */
.sidebar{
  width:var(--sidebar-w);flex:none;
  border-right:1px solid var(--line);
  padding:22px 14px 16px;
  display:flex;flex-direction:column;gap:8px;
  position:sticky;top:var(--topbar-h);height:calc(100vh - var(--topbar-h));overflow-y:auto;
}
.side-nav{flex:1;display:flex;flex-direction:column;gap:2px}
.nav-item{
  display:flex;align-items:center;gap:12px;padding:11px 12px;border-radius:11px;
  font-size:14px;color:var(--ink-soft);font-weight:500;transition:.18s;position:relative;
}
.nav-item .nav-ico{width:20px;height:20px;display:grid;place-items:center;color:var(--muted);transition:.18s}
.nav-item .nav-ico svg{width:18px;height:18px}
.nav-item:hover{background:var(--surface);color:var(--ink)}
.nav-item[aria-current="page"]{
  background:linear-gradient(120deg,#FFE3B8,color-mix(in srgb,var(--surface) 60%,#FFE3B8));
  color:#7A3E00;font-weight:700;
}
[data-theme="dark"] .nav-item[aria-current="page"]{color:#FFE1B3}
.nav-item[aria-current="page"] .nav-ico{color:var(--primary-strong)}
.nav-item[aria-current="page"]::before{content:"";position:absolute;left:-14px;top:20%;bottom:20%;width:3px;border-radius:3px;background:var(--primary)}
.nav-divider{height:1px;background:var(--line);margin:8px 6px}
.nav-group-label{font-size:10.5px;letter-spacing:.14em;color:var(--muted);padding:10px 12px 4px;text-transform:uppercase;font-weight:600}

.sidebar__foot{border-top:1px solid var(--line);padding-top:12px}
.api-pill{display:flex;align-items:center;gap:8px;font-size:11.5px;color:var(--muted);padding:4px 6px}
.api-pill__dot{width:8px;height:8px;border-radius:50%;background:var(--ok);box-shadow:0 0 0 3px var(--ok-bg);flex:none}
.api-pill__dot.off{background:var(--warn);box-shadow:0 0 0 3px var(--warn-bg)}

/* ---------- 底部 Tab（移动端） ---------- */
.tabbar{
  display:none;position:fixed;bottom:0;left:0;right:0;z-index:40;height:60px;
  background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:blur(12px);
  border-top:1px solid var(--line);
  padding-bottom:env(safe-area-inset-bottom);
}
.tabbar__item{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;color:var(--muted);font-size:10.5px;transition:.18s}
.tabbar__item svg{width:21px;height:21px}
.tabbar__item[aria-current="page"]{color:var(--primary-strong);font-weight:600}
.tabbar__item:not([aria-current="page"]):hover{color:var(--ink-soft)}

/* ============================================================
   通用组件
   ============================================================ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:42px;padding:0 20px;border-radius:var(--btn-r);
  font-size:14px;font-weight:600;transition:.2s var(--ease);white-space:nowrap;
}
.btn svg{width:17px;height:17px}
.btn--primary{background:linear-gradient(135deg,var(--primary),#FF6A00);color:#fff;box-shadow:0 8px 20px rgba(255,106,0,.3)}
.btn--primary:hover{transform:translateY(-1px);box-shadow:0 12px 26px rgba(255,106,0,.4)}
.btn--primary:active{transform:translateY(0)}
.btn--ghost{border:1px solid var(--line-strong);color:var(--ink-soft);background:var(--surface)}
.btn--ghost:hover{border-color:var(--primary);color:var(--primary-strong);background:var(--surface-2)}
.btn--soft{background:var(--surface-3);color:#8A4A00}
[data-theme="dark"] .btn--soft{color:#FFD9A8}
.btn--soft:hover{background:color-mix(in srgb,var(--surface-3) 75%,var(--primary))}
.btn--danger{background:var(--danger-bg);color:var(--danger)}
.btn--danger:hover{filter:brightness(.97)}
.btn--sm{height:34px;padding:0 14px;font-size:13px;border-radius:7px}
.btn--lg{height:48px;padding:0 28px;font-size:15px}
.btn:disabled{opacity:.5;cursor:not-allowed;transform:none!important}
.btn--block{width:100%}

.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--card-r);
  box-shadow:var(--shadow-sm);transition:.25s var(--ease);
}
.card--hover:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:color-mix(in srgb,var(--line-strong) 60%,var(--primary))}

.badge{
  display:inline-flex;align-items:center;gap:5px;padding:2px 9px;border-radius:20px;
  font-size:11px;font-weight:600;letter-spacing:.02em;
}
.badge--dif{background:var(--surface-3);color:#8A4A00}
[data-theme="dark"] .badge--dif{color:#FFD9A8}
.badge--ok{background:var(--ok-bg);color:var(--ok)}
.badge--warn{background:var(--warn-bg);color:var(--warn)}
.badge--danger{background:var(--danger-bg);color:var(--danger)}
.badge--ghost{border:1px solid var(--line-strong);color:var(--muted)}
.badge--gold{background:linear-gradient(120deg,rgba(255,215,0,.18),rgba(255,140,0,.18));color:#A86A00}
[data-theme="dark"] .badge--gold{color:#FFD9A8}

.chip{display:inline-flex;align-items:center;gap:5px;padding:3px 10px;border-radius:20px;font-size:12px;border:1px solid var(--line-strong);color:var(--ink-soft)}
.chip.active{background:var(--primary);border-color:var(--primary);color:#fff}

.field{margin-bottom:16px}
.field label{display:block;font-size:13px;font-weight:600;color:var(--ink-soft);margin-bottom:7px}
.field label .req{color:var(--danger);margin-left:2px}
.input,textarea.input,select.input{
  width:100%;height:44px;border-radius:var(--btn-r);border:1px solid var(--line-strong);
  background:var(--surface);padding:0 14px;font-size:14px;outline:none;transition:.2s;
  color:var(--ink);
}
textarea.input{height:auto;padding:12px 14px;line-height:1.6;resize:vertical;min-height:90px;color:var(--ink);background:var(--surface);opacity:1}
.input:focus{border-color:var(--primary);box-shadow:var(--ring)}
.input:disabled{opacity:.6;background:var(--surface-3)}
.field .hint{font-size:11.5px;color:var(--muted);margin-top:6px}

.switch{position:relative;display:inline-flex;align-items:center;gap:10px;cursor:pointer}
.switch input{position:absolute;opacity:0;width:0;height:0}
.switch__track{width:42px;height:24px;border-radius:20px;background:var(--line-strong);transition:.25s;position:relative;flex:none}
.switch__track::after{content:"";position:absolute;top:3px;left:3px;width:18px;height:18px;border-radius:50%;background:#fff;box-shadow:var(--shadow-sm);transition:.25s var(--ease)}
.switch input:checked+.switch__track{background:var(--primary)}
.switch input:checked+.switch__track::after{transform:translateX(18px)}
.switch span{font-size:13.5px}

/* 进度条 */
.progress{height:7px;border-radius:6px;background:var(--surface-3);overflow:hidden}
.progress>i{display:block;height:100%;border-radius:6px;background:linear-gradient(90deg,var(--primary),#FFB84D);transition:width .8s var(--ease)}
.progress--thin{height:5px}

/* 空状态 */
.empty{text-align:center;padding:60px 20px;color:var(--muted)}
.empty .empty__ico{width:70px;height:70px;margin:0 auto 16px;border-radius:22px;background:var(--surface-3);display:grid;place-items:center;color:var(--primary);box-shadow:var(--shadow-sm)}
.empty .empty__ico svg{width:32px;height:32px}
.empty b{display:block;font-family:var(--font-display);font-size:17px;color:var(--ink-soft);margin-bottom:4px}
.empty p{font-size:13px;max-width:380px;margin:0 auto}

/* 骨架屏 */
.skeleton{border-radius:var(--card-r);background:linear-gradient(100deg,var(--surface-3) 40%,var(--surface) 50%,var(--surface-3) 60%);background-size:300% 100%;animation:shimmer 1.4s infinite}
.skeleton--line{height:14px;border-radius:6px}
.skeleton--block{min-height:140px}
@keyframes shimmer{to{background-position:-300% 0}}

/* ---------- Toast ---------- */
.toast-root{position:fixed;top:calc(var(--topbar-h) + 14px);left:50%;transform:translateX(-50%);z-index:200;display:flex;flex-direction:column;gap:8px;align-items:center;pointer-events:none}
.toast{
  background:var(--surface);border:1px solid var(--line);border-radius:12px;
  box-shadow:var(--shadow-md);padding:11px 18px;font-size:13.5px;font-weight:500;
  display:flex;align-items:center;gap:10px;animation:toastIn .3s var(--ease) both;max-width:420px;
}
.toast.out{animation:toastOut .3s var(--ease) both}
.toast--ok svg{color:var(--ok)} .toast--err svg{color:var(--danger)} .toast--info svg{color:var(--primary)}
.toast svg{width:18px;height:18px;flex:none}
@keyframes toastIn{from{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:none}}
@keyframes toastOut{to{opacity:0;transform:translateY(-8px)}}

/* ---------- 模态 ---------- */
.modal-root{position:fixed;inset:0;z-index:150;pointer-events:none}
.modal{position:fixed;inset:0;display:flex;align-items:center;justify-content:center;padding:20px;pointer-events:auto}
.modal__mask{position:absolute;inset:0;background:rgba(40,22,6,.5);backdrop-filter:blur(3px);animation:fade .25s both}
.modal__panel{
  position:relative;width:100%;max-width:520px;max-height:88vh;overflow:auto;
  background:var(--surface);border:1px solid var(--line);border-radius:18px;
  box-shadow:var(--shadow-lg);padding:26px;animation:pop .35s var(--ease) both;
}
.modal__panel--lg{max-width:720px}
@keyframes pop{from{opacity:0;transform:translateY(18px) scale(.97)}to{opacity:1;transform:none}}
@keyframes fade{from{opacity:0}to{opacity:1}}
.modal__head{display:flex;align-items:flex-start;justify-content:space-between;gap:14px;margin-bottom:18px}
.modal__head h3{font-size:20px;font-weight:900}
.modal__head p{font-size:13px;color:var(--muted);margin-top:4px}
.modal__close{width:34px;height:34px;border-radius:9px;display:grid;place-items:center;color:var(--muted);transition:.2s;flex:none}
.modal__close:hover{background:var(--surface-3);color:var(--ink)}
.modal__close svg{width:18px;height:18px}
.modal__foot{display:flex;justify-content:flex-end;gap:10px;margin-top:22px}

/* 页面加载遮罩 */
.page-loader{position:fixed;inset:0;z-index:300;display:grid;place-items:center;background:var(--bg);transition:opacity .4s;pointer-events:none}
.page-loader.hide{opacity:0;visibility:hidden}
.page-loader span{width:44px;height:44px;border-radius:50%;border:3px solid var(--line);border-top-color:var(--primary);animation:spin .8s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

/* 返回提示 */
.backlink{display:inline-flex;align-items:center;gap:6px;font-size:13px;color:var(--muted);margin-bottom:14px;transition:.2s}
.backlink:hover{color:var(--primary-strong)}
.backlink svg{width:15px;height:15px}

/* ============================================================
   登录页（清爽单卡 · 手机优先）
   ============================================================ */
.login-shell{
  min-height:100vh;display:flex;align-items:flex-start;justify-content:center;
  padding:clamp(24px,8vh,64px) 20px 48px;overflow-y:auto;
}
.auth{width:100%;max-width:420px;animation:pop .4s var(--ease) both}
.auth__card{
  background:var(--surface);border:1px solid var(--line);border-radius:20px;
  box-shadow:var(--shadow-lg);padding:30px 28px 28px;
}
.auth__brand{display:flex;align-items:center;gap:13px;margin-bottom:26px}
.logo-badge{
  width:52px;height:52px;border-radius:15px;display:grid;place-items:center;flex:none;
  font-family:var(--font-display);font-size:28px;font-weight:900;
  background:linear-gradient(135deg,var(--primary),#FF6A00);color:#fff;
  box-shadow:0 8px 22px rgba(255,106,0,.32);
}
.auth__brand-text{display:flex;flex-direction:column;line-height:1.2}
.auth__brand-text b{font-family:var(--font-display);font-size:21px;letter-spacing:1px}
.auth__brand-text small{font-size:10.5px;opacity:.62;letter-spacing:.16em}
.auth__title{font-size:24px;font-weight:900;margin-bottom:4px;line-height:1.3}
.auth__sub{color:var(--muted);font-size:13.5px;margin-bottom:22px}
.auth__banner{
  margin-bottom:18px;padding:12px 14px;border-radius:11px;
  background:var(--warn-bg);border:1px solid var(--line);
  font-size:13px;color:var(--ink-soft);line-height:1.7;
}
.auth__foot{margin-top:18px;text-align:center;font-size:13.5px;color:var(--muted)}
.auth__foot button{color:var(--primary-strong);font-weight:700}
.auth__foot button:hover{text-decoration:underline}
.auth__tip{margin-top:16px;font-size:12px;color:var(--muted);line-height:1.6;text-align:center}

/* ============================================================
   课程大厅
   ============================================================ */
.lobby{display:flex;flex-direction:column;gap:22px}

/* 模块切换标签（平铺导航） */
.module-tabs{display:flex;gap:8px;flex-wrap:wrap}
.module-tabs .tab{
  display:inline-flex;align-items:center;gap:8px;padding:9px 16px;border-radius:30px;
  border:1px solid var(--line);background:var(--surface);font-size:13.5px;font-weight:600;
  color:var(--ink-soft);cursor:pointer;transition:.2s;white-space:nowrap;
}
.module-tabs .tab:hover{border-color:var(--primary);color:var(--primary-strong)}
.module-tabs .tab .tab__count{
  font-size:11px;font-weight:700;color:var(--muted);
  background:var(--surface-3);border-radius:999px;padding:1px 8px;min-width:20px;text-align:center;
}
.module-tabs .tab.active{
  background:linear-gradient(135deg,var(--primary),#FF6A00);color:#fff;
  border-color:transparent;box-shadow:0 6px 16px rgba(255,140,0,.28);
}
.module-tabs .tab.active .tab__count{background:rgba(255,255,255,.22);color:#fff}
.module-node{border:1px solid var(--line);border-radius:13px;background:var(--surface);overflow:hidden;margin-bottom:10px;box-shadow:var(--shadow-sm)}
.module-node__head{display:flex;align-items:center;gap:11px;padding:13px 14px;cursor:pointer;transition:.18s}
.module-node__head:hover{background:var(--surface-2)}
.module-node__head .m-ico{width:36px;height:36px;border-radius:10px;display:grid;place-items:center;background:linear-gradient(135deg,var(--brown),var(--primary));color:#fff;flex:none}
.module-node__head .m-ico svg{width:18px;height:18px}
.module-node__head b{font-family:var(--font-display);font-size:15px;flex:1}
.module-node__head small{color:var(--muted);font-size:12px}
.module-node__caret{width:16px;height:16px;color:var(--muted);transition:.3s var(--ease)}
.module-node.open>.module-node__head .module-node__caret{transform:rotate(180deg)}
.module-node__body{max-height:0;overflow:hidden;transition:max-height .35s var(--ease)}
.module-node.open>.module-node__body{max-height:600px}
.module-node__body{padding:0 12px 12px}
.topic-item{border:1px solid transparent;border-radius:10px;transition:.15s}
.topic-item>button{width:100%;display:flex;align-items:center;gap:10px;padding:9px 10px;border-radius:10px;font-size:13.5px;color:var(--ink-soft);transition:.15s;text-align:left}
.topic-item>button:hover{background:var(--surface-2);color:var(--ink)}
.topic-item>button b{flex:1;font-weight:600}
.topic-item>button small{color:var(--muted);font-size:11.5px}
.topic-item>button .caret{width:14px;height:14px;transition:.3s;color:var(--muted)}
.topic-item.open>button .caret{transform:rotate(180deg)}
.topic-courses{padding:2px 4px 6px 22px}
.tree-course{display:flex;align-items:center;gap:9px;padding:8px 10px;border-radius:9px;font-size:13px;color:var(--ink-soft);cursor:pointer;transition:.15s}
.tree-course:hover{background:var(--surface-3);color:var(--ink)}
.tree-course.active{background:#FFE3B8;color:#7A3E00;font-weight:600}
[data-theme="dark"] .tree-course.active{background:rgba(255,167,61,.16);color:#FFD9A8}
.tree-course .dot{width:5px;height:5px;border-radius:50%;background:var(--primary);flex:none;opacity:0}
.tree-course.active .dot{opacity:1}

.lobby__main{min-width:0}
.fixtures{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:22px}
.fixture{padding:9px 16px;border-radius:30px;border:1px solid var(--line);background:var(--surface);font-size:13px;display:flex;align-items:center;gap:8px;color:var(--ink-soft);transition:.2s;cursor:pointer}
.fixture:hover{border-color:var(--primary);color:var(--primary-strong);transform:translateY(-1px)}
.fixture .f-ico{width:22px;height:22px;border-radius:7px;display:grid;place-items:center;background:var(--surface-3);color:var(--primary-strong)}
.fixture .f-ico svg{width:13px;height:13px}
.fixture small{color:var(--muted)}

.course-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:20px}
.course-card{position:relative;display:flex;flex-direction:column;padding:22px;gap:14px;overflow:hidden}
.course-card__top{display:flex;align-items:flex-start;justify-content:space-between;gap:10px}
.course-card__tag{display:inline-flex;align-items:center;gap:6px;font-size:11.5px;color:var(--muted)}
.course-card__tag svg{width:13px;height:13px}
.course-card h3{font-size:19px;font-weight:900;line-height:1.35}
.course-card p{font-size:13px;color:var(--ink-soft);min-height:40px}
.course-card__meta{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-top:2px}
.teacher{display:flex;align-items:center;gap:9px;margin-top:auto}
.teacher .t-av{width:34px;height:34px;border-radius:50%;display:grid;place-items:center;background:linear-gradient(135deg,var(--brown),var(--primary));color:#fff;font-family:var(--font-display);font-weight:700;font-size:13px;flex:none}
.teacher b{font-size:13px;display:block}
.teacher small{font-size:11px;color:var(--muted)}
.course-card__foot{display:flex;align-items:center;justify-content:space-between;gap:10px;border-top:1px dashed var(--line);padding-top:12px}
.course-card__foot .pct{font-size:12px;color:var(--muted);font-weight:600}
.course-card__sg{margin-left:auto;display:flex;align-items:center;gap:10px}

/* ============================================================
   课程概览
   ============================================================ */
.course-hero{
  position:relative;overflow:hidden;border-radius:16px;padding:30px 32px;margin-bottom:26px;
  background:linear-gradient(135deg,#6E3A0E,#8B4513 45%,#B45F1F);
  color:#FFF3E0;border:1px solid rgba(255,215,0,.2);
}
[data-theme="dark"] .course-hero{background:linear-gradient(135deg,#7A4114,#5E2E0A 55%,#7A3E12)}
.course-hero::before{content:"";position:absolute;inset:0;background-image:radial-gradient(rgba(255,215,0,.2) 1px,transparent 1px);background-size:22px 22px;opacity:.35}
.course-hero__inner{position:relative;z-index:1;display:flex;gap:22px;align-items:center;flex-wrap:wrap}
.course-hero .hero-logo{width:76px;height:76px;border-radius:20px;display:grid;place-items:center;background:linear-gradient(135deg,var(--primary),#FF6A00);font-family:var(--font-display);font-size:36px;font-weight:900;color:#fff;box-shadow:0 12px 30px rgba(0,0,0,.3);flex:none}
.course-hero h1{font-size:28px;font-weight:900;color:#fff}
.course-hero .hero-sub{color:#FFE7C2;font-size:13.5px;margin-top:4px}
.course-hero .hero-meta{display:flex;gap:8px;margin-top:12px;flex-wrap:wrap}
.course-hero .hero-teacher{margin-left:auto;text-align:right;max-width:340px}
.course-hero .hero-teacher small{opacity:.8;font-size:12px}
.course-hero .hero-teacher b{font-family:var(--font-display);font-size:17px;color:var(--accent)}
.course-hero .hero-teacher .t-av{width:46px;height:46px;border-radius:50%;display:inline-grid;place-items:center;background:linear-gradient(135deg,var(--accent),var(--primary));color:#5A2E0C;font-weight:800;font-size:17px;margin:0 auto 8px;font-family:var(--font-display)}

.course-layout{display:grid;grid-template-columns:minmax(0,1fr) 330px;gap:26px;align-items:start}
.card-index{border-radius:var(--card-r);border:1px solid var(--line);background:var(--surface);box-shadow:var(--shadow-sm);overflow:hidden}
.card-index__head{padding:18px 20px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between}
.card-index__head h3{font-size:17px;font-weight:900}
.card-index__head small{color:var(--muted);font-size:12px}
.card-index__list{max-height:560px;overflow:auto;padding:8px}
.card-idx-item{display:flex;gap:12px;padding:12px 12px;border-radius:11px;cursor:pointer;transition:.16s;align-items:flex-start}
.card-idx-item:hover{background:var(--surface-2)}
.card-idx-item__num{width:34px;height:34px;border-radius:9px;background:var(--surface-3);color:var(--primary-strong);font-family:var(--font-display);font-weight:700;display:grid;place-items:center;font-size:13px;flex:none}
.card-idx-item b{font-size:14px;display:block}
.card-idx-item small{font-size:12px;color:var(--muted)}
.card-idx-item .master{width:60px;flex:none;margin-left:auto;text-align:right}
.card-idx-item .master small{display:block;font-size:10.5px;margin-bottom:3px}
.card-idx-item .progress{width:60px}

.overview-side{display:flex;flex-direction:column;gap:14px;position:sticky;top:calc(var(--topbar-h) + 22px)}
.ov-card{padding:20px;border-radius:var(--card-r);border:1px solid var(--line);background:var(--surface);box-shadow:var(--shadow-sm)}
.ov-card h4{font-size:14px;font-weight:800;margin-bottom:12px;display:flex;align-items:center;gap:8px}
.ov-card h4 svg{width:16px;height:16px;color:var(--primary-strong)}
.ov-stats{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
.ov-stat{background:var(--surface-2);border:1px solid var(--line);border-radius:11px;padding:13px;text-align:center}
.ov-stat b{font-family:var(--font-display);font-size:22px;color:var(--primary-strong);display:block}
.ov-stat small{font-size:11px;color:var(--muted)}
.learn-panel{display:flex;flex-direction:column;gap:12px;text-align:center}
.learn-panel .btn{width:100%}

.scene-list{display:flex;flex-direction:column;gap:10px}
.scene-item{padding:14px 16px;border-radius:12px;border:1px solid var(--line);background:var(--surface);display:flex;align-items:center;gap:14px;transition:.2s;cursor:pointer}
.scene-item:hover{border-color:var(--primary);transform:translateX(3px)}
.scene-item .s-ico{width:38px;height:38px;border-radius:10px;background:var(--surface-3);display:grid;place-items:center;color:var(--primary-strong);flex:none}
.scene-item .s-ico svg{width:19px;height:19px}
.scene-item b{font-size:14px;display:block}
.scene-item small{font-size:12px;color:var(--muted)}

.terms-strip{display:flex;gap:8px;flex-wrap:wrap;margin-top:14px}
.term-pill{padding:7px 13px;border-radius:20px;border:1px solid var(--line);background:var(--surface);font-size:12.5px;cursor:pointer;transition:.18s}
.term-pill:hover{border-color:var(--primary);background:var(--surface-2)}

/* ============================================================
   能力卡详情（RIA 六段式）
   ============================================================ */
.card-detail__tools{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-bottom:20px}
.card-detail__nav{display:flex;gap:8px}
.card-nav-btn{width:40px;height:40px;border-radius:10px;border:1px solid var(--line);background:var(--surface);display:grid;place-items:center;color:var(--ink-soft);transition:.2s}
.card-nav-btn:hover:not(:disabled){border-color:var(--primary);color:var(--primary-strong)}
.card-nav-btn:disabled{opacity:.35;cursor:not-allowed}
.card-nav-btn svg{width:18px;height:18px}

.ria-head{padding:26px 28px;border-radius:16px;margin-bottom:20px;background:linear-gradient(130deg,var(--surface-3),var(--surface));border:1px solid var(--line);position:relative;overflow:hidden;animation:rise .45s var(--ease) both}
.ria-head::after{content:"RIA";position:absolute;right:-6px;bottom:-26px;font-family:var(--font-display);font-weight:900;font-size:120px;color:rgba(255,140,0,.07);line-height:1}
.ria-head h1{font-size:26px;font-weight:900}
.ria-head .sum{color:var(--ink-soft);font-size:14px;margin:6px 0 12px;max-width:600px}
.ria-head .tags{display:flex;gap:8px;flex-wrap:wrap}

.ria-body{display:flex;flex-direction:column;gap:16px}
.ria-seg{
  border:1px solid var(--line);border-radius:15px;background:var(--surface);overflow:hidden;box-shadow:var(--shadow-sm);
  animation:rise .5s var(--ease) both;
}
.ria-seg__bar{display:flex;align-items:center;gap:12px;padding:15px 20px;cursor:pointer;transition:.2s;user-select:none}
.ria-seg__bar:hover{background:var(--surface-2)}
.ria-seg__badge{width:40px;height:40px;border-radius:11px;display:grid;place-items:center;font-family:var(--font-display);font-weight:900;font-size:16px;color:#fff;flex:none}
.ria-seg[data-key="R"] .ria-seg__badge{background:linear-gradient(135deg,#C0601F,#8A4A00)}
.ria-seg[data-key="I"] .ria-seg__badge{background:linear-gradient(135deg,#B8860B,#8B6914)}
.ria-seg[data-key="A1"] .ria-seg__badge{background:linear-gradient(135deg,#D9840F,#A65E08)}
.ria-seg[data-key="A2"] .ria-seg__badge{background:linear-gradient(135deg,#E0A23E,#B07A14)}
.ria-seg[data-key="E"] .ria-seg__badge{background:linear-gradient(135deg,#3E8A52,#2A6B3B)}
.ria-seg[data-key="B"] .ria-seg__badge{background:linear-gradient(135deg,#7A5AA0,#5A3E79)}
.ria-seg__bar b{font-family:var(--font-display);font-size:16px;flex:1}
.ria-seg__bar small{color:var(--muted);font-size:12px}
.ria-seg__chev{color:var(--muted);transition:.3s}
.ria-seg.open .ria-seg__chev{transform:rotate(180deg)}
.ria-seg__body{max-height:0;overflow:hidden;transition:max-height .45s var(--ease)}
.ria-seg.open .ria-seg__body{max-height:2000px}
.ria-seg__inner{padding:4px 22px 22px;border-top:1px dashed var(--line);margin:0 20px;padding-top:16px;color:var(--ink-soft);font-size:14.5px;line-height:1.85}
.ria-seg__inner .quote{font-family:var(--font-display);font-size:15.5px;color:var(--ink);border-left:3px solid var(--primary);padding-left:14px;margin:10px 0}
.ria-seg__inner ul,.ria-seg__inner ol{margin-left:20px;margin:10px 0}
.ria-seg__inner li{margin:6px 0}
.step-list{counter-reset:step}
.step-item{display:flex;gap:13px;margin:12px 0;align-items:flex-start}
.step-item__num{counter-increment:step;flex:none;width:28px;height:28px;border-radius:8px;background:var(--primary);color:#fff;font-weight:700;font-size:13px;display:grid;place-items:center}
.example-card{margin:10px 0;padding:14px 16px;border-radius:11px;background:var(--surface-2);border:1px solid var(--line)}
.example-card b{display:block;font-size:13.5px;color:var(--ink);margin-bottom:5px}
.example-card p{font-size:13.5px}
.evidence-row{display:flex;gap:10px;align-items:flex-start;margin:8px 0}
.evidence-row .dot{width:8px;height:8px;border-radius:50%;margin-top:8px;flex:none}
.evidence-row.good .dot{background:var(--ok)}
.evidence-row.bad .dot{background:var(--danger)}
.evidence-row small{display:block;font-size:11.5px;color:var(--muted)}
.boundary-tag{display:inline-block;padding:4px 12px;border-radius:20px;margin:6px 6px 0 0;font-size:12.5px;border:1px solid var(--line-strong);color:var(--ink-soft)}

.source-strip{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-top:14px;padding:14px 18px;border-radius:12px;background:var(--surface-2);border:1px dashed var(--line)}
.source-strip svg{width:15px;height:15px;color:var(--muted)}
.source-strip small{color:var(--muted);font-size:12px}
.source-strip a{color:var(--primary-strong);font-size:12.5px;font-weight:600}
.source-strip a:hover{text-decoration:underline}

/* ============================================================
   学习工作台（对话）
   ============================================================ */
/* 自由学习：能力卡「让老师讲这张」按钮 */
.kmap-explain{margin-top:8px;padding:5px 10px;border:1px solid var(--line-strong);border-radius:8px;background:var(--surface);color:var(--primary-strong);font-size:11.5px;font-weight:600;transition:.18s;width:100%;text-align:center}
.kmap-explain:hover{border-color:var(--primary);background:var(--surface-2)}

/* 私教回复的溯源标注（依据技能包/通用经验补充） */
.msg__basis{margin-top:5px;font-size:11px;color:var(--muted);display:flex;align-items:center;gap:4px}

.workbench{display:grid;grid-template-columns:280px 1fr;grid-template-rows:minmax(0,1fr);gap:0;height:calc(100vh - var(--topbar-h) - 88px);min-height:0;border:1px solid var(--line);border-radius:16px;overflow:hidden;background:var(--surface);box-shadow:var(--shadow-sm)}
.tutor{height:calc(100vh - var(--topbar-h) - 88px);min-height:0;max-width:880px;margin:0 auto;border:1px solid var(--line);border-radius:16px;overflow:hidden;background:var(--surface);box-shadow:var(--shadow-sm);display:flex;flex-direction:column}
.learn-side{border-right:1px solid var(--line);background:var(--surface-2);display:flex;flex-direction:column}
.learn-side__head{padding:18px;border-bottom:1px solid var(--line)}
.learn-side__head .t-av{width:54px;height:54px;border-radius:50%;background:linear-gradient(135deg,var(--brown),var(--primary));display:grid;place-items:center;color:#fff;font-family:var(--font-display);font-size:22px;font-weight:800;margin-bottom:10px}
.learn-side__head h3{font-size:18px;font-weight:900}
.learn-side__head p{font-size:12.5px;color:var(--muted);margin-top:2px}
.learn-side__mastery{flex:1;overflow:auto;padding:16px}
.mastery-item{margin-bottom:16px}
.mastery-item .row{display:flex;justify-content:space-between;align-items:center;margin-bottom:6px}
.mastery-item .row b{font-size:13px}
.mastery-item .row small{font-size:11.5px;color:var(--muted)}
.mastery-item .progress{width:100%}
.learn-side__foot{padding:16px;border-top:1px solid var(--line);font-size:12.5px;color:var(--muted);line-height:1.7}
.learn-side__head-row{display:flex;align-items:flex-start;justify-content:space-between;gap:10px}
.learn-side__close{display:none;width:32px;height:32px;border-radius:9px;border:1px solid var(--line);background:var(--surface);color:var(--ink-soft);align-items:center;justify-content:center;flex:none}
.learn-side__close svg{width:15px;height:15px}

/* 诊疗进度面板（左栏 · 永有内容） */
.learn-side__body{flex:1;overflow:auto;padding:14px 16px 18px;display:flex;flex-direction:column;gap:20px}
.panel-sec__title{font-size:11.5px;font-weight:700;letter-spacing:.04em;color:var(--muted);margin-bottom:11px;display:flex;align-items:center;gap:7px}
.panel-sec__title::before{content:"";width:3px;height:12px;border-radius:2px;background:linear-gradient(180deg,var(--primary),#FF6A00)}
.phase-stepper{display:flex;flex-direction:column}
.step{display:flex;align-items:center;gap:10px;padding:0 0 14px;position:relative;font-size:13px;color:var(--muted)}
.step::before{content:"";position:absolute;left:11px;top:22px;bottom:3px;width:2px;background:var(--line)}
.step:last-child{padding-bottom:0}
.step:last-child::before{display:none}
.step__dot{width:22px;height:22px;border-radius:50%;flex:none;display:grid;place-items:center;font-size:11px;font-weight:700;border:2px solid var(--line-strong);color:var(--muted);background:var(--surface)}
.step__dot svg{width:11px;height:11px}
.step.is-done{color:var(--ink)}
.step.is-done .step__dot{background:var(--ok);border-color:var(--ok);color:#fff}
.step.is-active{color:var(--primary-strong);font-weight:700}
.step.is-active .step__dot{background:linear-gradient(135deg,var(--primary),#FF6A00);border-color:transparent;color:#fff;box-shadow:0 0 0 4px rgba(255,140,0,.18)}
.step__label{line-height:1.1}

.kmap{display:flex;flex-direction:column;gap:13px}
.kmap-item__top{display:flex;justify-content:space-between;align-items:center;margin-bottom:6px;gap:8px}
.kmap-item__top b{font-size:12.5px;font-weight:600}
.kmap-tag{font-size:10.5px;font-weight:700;padding:2px 8px;border-radius:999px;background:var(--surface-3);color:var(--muted);white-space:nowrap}
.kmap-tag--ok{background:var(--ok-bg);color:var(--ok)}
.kmap-tag--warn{background:var(--warn-bg);color:var(--warn)}
.kmap-tag--danger{background:var(--danger-bg);color:var(--danger)}
.kmap .progress{height:6px}

.panel-btn{display:none}
.panel-mask{position:fixed;inset:0;top:var(--topbar-h);background:rgba(40,20,5,.32);z-index:80;backdrop-filter:blur(1px)}

.chat{display:flex;flex-direction:column;min-width:0;min-height:0;overflow:hidden}
.chat__head{display:flex;align-items:center;gap:12px;padding:15px 20px;border-bottom:1px solid var(--line)}
.chat__head .m-ico{width:38px;height:38px;border-radius:11px;background:linear-gradient(135deg,var(--brown),var(--primary));display:grid;place-items:center;color:#fff}
.chat__head .m-ico svg{width:19px;height:19px}
.chat__head b{font-size:15px;display:block}
.chat__head small{font-size:12px;color:var(--muted)}
.chat__head .phase{margin-left:auto}
.phase-badge{display:inline-flex;align-items:center;gap:6px;padding:5px 12px;border-radius:20px;background:var(--surface-3);color:#8A4A00;font-size:12px;font-weight:600}
[data-theme="dark"] .phase-badge{color:#FFD9A8}
.phase-badge svg{width:13px;height:13px}
.chat__flow{flex:1;min-height:0;overflow-y:auto;padding:24px;display:flex;flex-direction:column;gap:18px;background:
  radial-gradient(600px 300px at 80% 0%, rgba(255,140,0,.05), transparent 60%)}
.msg{display:flex;gap:12px;max-width:78%;animation:msgIn .35s var(--ease) both}
.msg--user{align-self:flex-end;flex-direction:row-reverse}
@keyframes msgIn{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}
.msg__av{width:36px;height:36px;border-radius:50%;flex:none;display:grid;place-items:center;font-weight:700;font-size:14px}
.msg--teacher .msg__av{background:linear-gradient(135deg,var(--brown),var(--primary));color:#fff;font-family:var(--font-display)}
.msg--user .msg__av{background:var(--surface-3);color:var(--primary-strong)}
.msg__bubble{padding:14px 17px;border-radius:15px;font-size:14.5px;line-height:1.75}
.msg--teacher .msg__bubble{background:var(--surface);border:1px solid var(--line);border-top-left-radius:5px;box-shadow:var(--shadow-sm)}
.msg--user .msg__bubble{background:linear-gradient(135deg,var(--primary),#FF6A00);color:#fff;border-top-right-radius:5px;box-shadow:0 8px 20px rgba(255,106,0,.25)}
.msg__time{font-size:10.5px;color:var(--muted);margin-top:5px}
.msg--user .msg__time{text-align:right}

.msg-question{background:var(--surface-2);border:1px solid var(--line);border-radius:11px;margin-top:12px;overflow:hidden}
.msg-question__head{padding:9px 13px;font-size:12px;font-weight:700;color:var(--primary-strong);background:var(--surface-3);display:flex;align-items:center;gap:7px}
.msg-question__body{padding:13px;font-size:14px;line-height:1.7}
.msg-question__tags{display:flex;gap:6px;padding:0 13px 12px;flex-wrap:wrap}
.msg-question__tags .chip{font-size:11px;padding:2px 8px}

.msg-judge{padding:15px 17px;border-radius:12px;background:var(--surface-2);border:1px solid var(--line);margin-top:12px}
.msg-judge__score{display:flex;align-items:center;gap:14px;margin-bottom:12px}
.score-ring{--v:70;--ring:39px;position:relative;width:56px;height:56px;flex:none;border-radius:50%;background:conic-gradient(var(--primary) calc(var(--v)*1%),var(--surface-3) 0);display:grid;place-items:center}
.score-ring::before{content:"";position:absolute;inset:6px;border-radius:50%;background:var(--surface-2)}
.score-ring b{position:relative;z-index:1;font-family:var(--font-display);font-size:15px;color:var(--primary-strong)}
.msg-judge__score .vd{flex:1}
.msg-judge__score .vd b{font-size:16px;display:block}
.msg-judge__score .vd small{color:var(--muted);font-size:12px}
.msg-judge__verdict{display:flex;gap:10px;align-items:flex-start}
.msg-judge__verdict small{color:var(--muted);font-size:12px;display:block;margin-top:3px}
.evidence-btn{margin-top:12px;display:inline-flex;align-items:center;gap:7px;padding:8px 14px;border-radius:8px;background:var(--surface-3);color:#8A4A00;font-size:13px;font-weight:600;transition:.2s;border:1px solid var(--line)}
[data-theme="dark"] .evidence-btn{color:#FFD9A8}
.evidence-btn:hover{border-color:var(--primary)}
.evidence-btn svg{width:15px;height:15px}
.evidence-list{margin-top:14px;display:flex;flex-direction:column;gap:10px}
.evidence-card{padding:12px 14px;border-radius:10px;background:var(--surface);border:1px solid var(--line)}
.evidence-card .ev-card{display:flex;gap:9px;align-items:flex-start}
.evidence-card .ev-card b{font-size:13px;color:var(--primary-strong)}
.evidence-card .ev-card small{color:var(--muted);font-size:11px}
.evidence-card p{font-size:13px;color:var(--ink-soft);margin-top:6px;border-left:2px solid var(--line-strong);padding-left:10px}

.typing{display:inline-flex;gap:5px;padding:6px 2px}
.typing i{width:7px;height:7px;border-radius:50%;background:var(--muted);animation:tp 1.1s infinite}
.typing i:nth-child(2){animation-delay:.15s}.typing i:nth-child(3){animation-delay:.3s}
@keyframes tp{0%,60%,100%{opacity:.25;transform:translateY(0)}30%{opacity:1;transform:translateY(-4px)}}

.quick-actions{display:flex;gap:8px;flex-wrap:nowrap;margin-top:8px;overflow-x:auto;padding:4px 2px 6px;-webkit-overflow-scrolling:touch;scrollbar-width:none}
.quick-actions::-webkit-scrollbar{display:none}
.quick-actions button{flex:none;max-width:78%;padding:8px 14px;border-radius:20px;border:1px solid var(--line-strong);background:var(--surface);font-size:13px;color:var(--ink-soft);transition:.18s;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.quick-actions button:hover{border-color:var(--primary);color:var(--primary-strong);background:var(--surface-2)}

.chat__input{border-top:1px solid var(--line);padding:14px 16px 18px;background:var(--surface)}
.chat__input .box{display:flex;align-items:flex-end;gap:10px;border:1px solid var(--line-strong);border-radius:14px;background:var(--surface-2);padding:8px 8px 8px 16px;transition:.2s}
.chat__input .box:focus-within{border-color:var(--primary);box-shadow:var(--ring)}
.chat__input textarea{flex:1;border:none;background:none;outline:none;resize:none;font-size:14px;line-height:1.6;padding:6px 0;min-height:24px;max-height:130px}
.chat__input .send{width:40px;height:40px;border-radius:11px;background:linear-gradient(135deg,var(--primary),#FF6A00);color:#fff;display:grid;place-items:center;transition:.2s;flex:none}
.chat__input .send:hover{transform:translateY(-1px);box-shadow:0 6px 14px rgba(255,106,0,.35)}
.chat__input .send:disabled{opacity:.4}
.chat__input .send svg{width:18px;height:18px}
.chat__input .mic{width:40px;height:40px;border-radius:11px;border:1px solid var(--line-strong);background:var(--surface);color:var(--ink-soft);display:grid;place-items:center;transition:.2s;flex:none}
.chat__input .mic:hover{border-color:var(--primary);color:var(--primary-strong)}
.chat__input .mic:disabled{opacity:.4}
.chat__input .mic svg{width:20px;height:20px}
.chat__input .mic.is-listen{background:var(--danger);border-color:var(--danger);color:#fff;animation:pulse 1.2s infinite}
@keyframes pulse{0%,100%{box-shadow:0 0 0 0 rgba(220,60,60,.4)}50%{box-shadow:0 0 0 8px rgba(220,60,60,0)}}
.chat__input .foot{display:flex;justify-content:space-between;align-items:center;margin-top:8px;padding:0 6px;font-size:11.5px;color:var(--muted)}
.chat__input .tip{display:flex;align-items:center;gap:6px}
.chat__input .tip svg{width:13px;height:13px}
.end-session{margin-left:auto;color:var(--danger);font-size:12px;font-weight:600}
.end-session:hover{text-decoration:underline}

/* ---------- 诊断报告面板 ---------- */
.report-panel{border:1px solid var(--line);border-radius:14px;background:var(--surface-2);padding:18px;margin-top:6px;animation:msgIn .4s var(--ease) both}
.report-panel__head{display:flex;align-items:center;gap:11px;margin-bottom:14px}
.report-panel__head .r-ico{width:40px;height:40px;border-radius:11px;background:linear-gradient(135deg,var(--accent),var(--primary));display:grid;place-items:center;color:#5A2E0C}
.report-panel__head .r-ico svg{width:20px;height:20px}
.report-panel__head b{font-family:var(--font-display);font-size:16px}
.report-panel__head small{display:block;color:var(--muted);font-size:11.5px}
.report-bars{display:flex;flex-direction:column;gap:12px;margin:14px 0}
.report-bar .rb-top{display:flex;justify-content:space-between;font-size:13px;margin-bottom:5px}
.report-bar .rb-top small{color:var(--muted)}
.report-bars .mastery-tag{font-size:11px;padding:1px 7px;border-radius:10px;font-weight:600}
.report-weak{border-left:3px solid var(--warn);padding:10px 14px;background:var(--surface);border-radius:0 10px 10px 0;margin:8px 0}
.report-weak b{font-size:13px}
.report-weak small{color:var(--muted);font-size:12px;display:block;margin-top:3px}
.report-reco{display:flex;align-items:center;gap:12px;padding:13px 15px;border-radius:11px;background:linear-gradient(120deg,#FFE9C2,color-mix(in srgb,var(--surface) 55%,#FFE9C2));margin-top:12px}
[data-theme="dark"] .report-reco{background:rgba(255,167,61,.14)}
.report-reco .reco-ico{width:38px;height:38px;border-radius:10px;background:var(--primary);display:grid;place-items:center;color:#fff;flex:none}
.report-reco .reco-ico svg{width:19px;height:19px}
.report-reco b{font-size:14px;display:block}
.report-reco small{font-size:12.5px;color:var(--ink-soft)}
.report-reco a{margin-left:auto;flex:none}

/* ============================================================
   历史记录
   ============================================================ */
.hist-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.hist-progress{grid-column:1/-1}
.hist-progress__cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:14px;margin-top:14px}
.hp-card{padding:16px}
.hp-card .row{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px}
.hp-card .row b{font-size:14px}
.hp-card .row small{font-size:11px;color:var(--muted)}
.hp-card .progress{height:8px}
.hist-session{border-left:3px solid var(--primary);padding:16px 18px;border-radius:0 12px 12px 0;background:var(--surface)}
.hist-session__head{display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;margin-bottom:10px}
.hist-session h3{font-size:16px;font-weight:800}
.hist-session .meta{font-size:12px;color:var(--muted);display:flex;gap:14px;flex-wrap:wrap;align-items:center;margin-bottom:12px}
.hist-session .meta svg{width:13px;height:13px;vertical-align:-2px;margin-right:4px}
.statline{display:flex;gap:8px;flex-wrap:wrap}
.statcell{flex:1;min-width:120px;background:var(--surface-2);border:1px solid var(--line);border-radius:10px;padding:11px}
.statcell b{display:block;font-size:15px;color:var(--primary-strong);font-family:var(--font-display)}
.statcell small{font-size:11px;color:var(--muted)}

/* ============================================================
   蒸馏工坊
   ============================================================ */
.distill-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px;align-items:start}
.distill-grid>*{min-width:0}
.distill-input{padding:24px;border-radius:16px}
/* 表格通用容器：窄屏横向滚动，桌面也受益（成绩单/复判表等） */
.tbl-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch;max-width:100%}
.tbl{width:100%;border-collapse:collapse;background:var(--surface)}
.tbl th,.tbl td{border-bottom:1px solid var(--line);padding:8px 10px;text-align:center;font-size:12.5px;color:var(--ink-soft)}
.tbl th{color:var(--muted);font-weight:600;font-size:11.5px;white-space:nowrap}
.distill-tabs{display:flex;background:var(--surface-3);border-radius:10px;padding:4px;margin-bottom:16px;gap:4px}
.distill-tabs button{flex:1;padding:8px;border-radius:8px;font-size:13px;font-weight:600;color:var(--ink-soft);transition:.2s}
.distill-tabs button.active{background:var(--surface);color:var(--primary-strong);box-shadow:var(--shadow-sm)}
.textcount{font-size:11.5px;color:var(--muted);text-align:right;margin-top:6px}
.distill-opt{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:14px 0}
.distill-opt .field{margin:0}
.pipe-legend{display:flex;align-items:center;justify-content:space-between;font-size:11px;color:var(--muted);margin-top:14px;padding-top:14px;border-top:1px dashed var(--line);gap:4px}
.pipe-legend span{display:flex;align-items:center;gap:4px}
.pipe-legend svg{width:11px;height:11px;color:var(--primary)}

.task-stack{display:flex;flex-direction:column;gap:12px}
.task-item{border:1px solid var(--line);border-radius:13px;background:var(--surface);overflow:hidden;transition:.2s;box-shadow:var(--shadow-sm)}
.task-item:hover{border-color:color-mix(in srgb,var(--line-strong) 50%,var(--primary))}
.task-item__head{display:flex;align-items:flex-start;gap:12px;padding:16px;cursor:pointer}
.task-item__body{max-height:0;overflow:hidden;transition:max-height .4s var(--ease)}
.task-item.open .task-item__body{max-height:1400px}
.task-item.open{border-color:var(--primary)}
.task-item__body-inner{padding:0 18px 18px;border-top:1px dashed var(--line);margin:0;padding-top:14px}
.task-meta{flex:1;min-width:0}
.task-meta b{font-size:14.5px;display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.task-meta small{font-size:12px;color:var(--muted)}
.task-detail-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;margin-bottom:14px}
.td-cell{background:var(--surface-2);border:1px solid var(--line);border-radius:9px;padding:10px 12px}
.td-cell small{font-size:10.5px;color:var(--muted);display:block;margin-bottom:3px}
.td-cell b{font-size:13.5px}
.td-cell b em{font-style:normal;color:var(--primary-strong)}
.card-mini{margin:8px 0;padding:12px 14px;background:var(--surface-2);border:1px solid var(--line);border-radius:10px}
.card-mini__head{display:flex;justify-content:space-between;gap:8px;align-items:center;margin-bottom:5px}
.card-mini__head b{font-size:14px}
.card-mini p{font-size:12.5px;color:var(--ink-soft)}
.seg-row{display:flex;align-items:center;gap:10px;padding:9px 11px;border-radius:9px;background:var(--surface-2);font-size:13px;margin:7px 0}
.seg-row small{color:var(--muted)}
.seg-frac{font-size:11px;color:var(--muted);font-weight:600;flex:1;text-align:right}
.task-actions{display:flex;gap:8px;margin-top:16px;flex-wrap:wrap}

/* ============================================================
   复判队列
   ============================================================ */
.review-filters{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:20px}
.review-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(340px,1fr));gap:18px}
.review-card{padding:22px;position:relative}
.review-card__top{display:flex;justify-content:space-between;align-items:flex-start;gap:10px;margin-bottom:12px}
.review-card h3{font-size:17px;font-weight:800}
.review-card__src{font-size:12.5px;color:var(--muted);margin-bottom:12px;display:flex;align-items:center;gap:6px}
.review-card__src svg{width:13px;height:13px}
.ratio-bar{display:flex;height:10px;border-radius:6px;overflow:hidden;margin:12px 0 6px;background:var(--surface-3)}
.ratio-bar .g{background:linear-gradient(90deg,#B45F1F,var(--primary))}
.ratio-bar .c{background:linear-gradient(90deg,#4A90C2,#7FB3D9)}
.ratio-legend{display:flex;gap:16px;font-size:11.5px;color:var(--muted)}
.ratio-legend i{display:inline-block;width:9px;height:9px;border-radius:3px;margin-right:5px;vertical-align:-1px}
.extracted{display:flex;flex-direction:column;gap:8px;margin:14px 0}
.extracted-item{display:flex;align-items:center;gap:10px;padding:9px 11px;border-radius:9px;background:var(--surface-2);font-size:13px}
.extracted-item .ind{width:24px;height:24px;border-radius:7px;background:var(--surface-3);color:var(--primary-strong);font-weight:700;display:grid;place-items:center;flex:none;font-size:11px}
.extracted-item.merged .ind{background:var(--ok-bg);color:var(--ok)}
.extracted-item b{flex:1}
.review-card__actions{display:flex;gap:8px;margin-top:16px;border-top:1px dashed var(--line);padding-top:14px;flex-wrap:wrap}

/* ============================================================
   系统设置
   ============================================================ */
.settings-layout{display:grid;grid-template-columns:210px 1fr;gap:22px;align-items:start}
.set-nav{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:10px;position:sticky;top:calc(var(--topbar-h) + 22px)}
.set-nav button{display:flex;align-items:center;gap:10px;width:100%;padding:11px 13px;border-radius:9px;font-size:13.5px;color:var(--ink-soft);transition:.16s;text-align:left;font-weight:500}
.set-nav button svg{width:16px;height:16px;flex:none}
.set-nav button:hover{background:var(--surface-2);color:var(--ink)}
.set-nav button.active{background:#FFE3B8;color:#7A3E00;font-weight:700}
[data-theme="dark"] .set-nav button.active{background:rgba(255,167,61,.16);color:#FFD9A8}
.set-panel{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:26px;animation:viewIn .35s var(--ease) both}
.set-panel h3{font-size:19px;font-weight:900;margin-bottom:6px}
.set-panel .set-sub{color:var(--muted);font-size:13px;margin-bottom:22px}
.set-block{padding:18px 0;border-top:1px solid var(--line)}
.set-block:first-of-type{border-top:none;padding-top:0}
.set-block__row{display:flex;align-items:flex-start;justify-content:space-between;gap:18px;padding:14px 0}
.set-block__row+.set-block__row{border-top:1px dashed var(--line)}
.set-block__row .desc{flex:1}
.set-block__row .desc b{font-size:14px;display:block}
.set-block__row .desc small{font-size:12.5px;color:var(--muted)}
.set-row-actions{display:flex;gap:8px}
.ai-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:12px;margin-top:14px}
.ai-preset{border:1px solid var(--line);border-radius:12px;padding:15px;cursor:pointer;transition:.18s;background:var(--surface-2)}
.ai-preset:hover{border-color:var(--primary)}
.ai-preset.selected{border-color:var(--primary);box-shadow:var(--ring);background:#FFE9C2}
[data-theme="dark"] .ai-preset.selected{background:rgba(255,167,61,.14)}
.ai-preset b{font-size:14px;display:block;display:flex;align-items:center;gap:6px}
.ai-preset small{font-size:11.5px;color:var(--muted);margin-top:4px;display:block}
.user-row{display:flex;align-items:center;gap:14px;padding:13px;border-radius:11px;border:1px solid var(--line);margin-bottom:10px;background:var(--surface-2)}
.user-row .u-av{width:40px;height:40px;border-radius:50%;background:linear-gradient(135deg,var(--brown),var(--primary));color:#fff;display:grid;place-items:center;font-family:var(--font-display);font-weight:700;flex:none}
.user-row .u-main{flex:1;min-width:0}
.user-row .u-main b{font-size:14px;display:flex;align-items:center;gap:7px}
.user-row .u-main small{color:var(--muted);font-size:12px}
.danger-zone{border:1px solid var(--danger-bg);background:var(--danger-bg);border-radius:12px;padding:18px;margin-top:20px}
.danger-zone b{color:var(--danger);font-size:14px}
.danger-zone small{color:var(--ink-soft);font-size:12.5px;display:block;margin:6px 0 14px;line-height:1.7}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width:1080px){
  .lobby{grid-template-columns:1fr}
  .lobby__tree{position:static;display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:10px}
  .course-layout{grid-template-columns:1fr}
  .overview-side{position:static}
  .workbench{grid-template-columns:230px 1fr}
  .distill-grid{grid-template-columns:minmax(0,1fr)}
}
@media (max-width:860px){
  .topbar__search{display:none}
  .layout{padding-top:0}
  .view{padding:20px 18px 90px}
  .sidebar{position:fixed;left:0;top:0;bottom:0;width:280px;z-index:80;transform:translateX(-100%);transition:transform .3s var(--ease);top:var(--topbar-h);height:auto;background:var(--bg);box-shadow:var(--shadow-lg)}
  .sidebar.open{transform:none}
  .topbar__burger{display:flex}
  .tabbar{display:flex}
  .page-head h1{font-size:24px}
  .hist-grid{grid-template-columns:1fr}
  .workbench{grid-template-columns:1fr;border:none;border-radius:0;box-shadow:none;background:transparent;
    height:calc(var(--vvh,100dvh) - var(--topbar-h) - 80px - env(safe-area-inset-bottom,0px))}
  /* 聊天页（学习/私教）：外层视图不再留白，让聊天区自己算高度、真正占满——2026-09-28 */
  .view:has(.workbench),.view:has(.tutor){padding:0}
  .tutor{max-width:none;border:none;border-radius:0;box-shadow:none;background:transparent;
    height:calc(var(--vvh,100dvh) - var(--topbar-h) - 80px - env(safe-area-inset-bottom,0px));min-height:0}
  /* 键盘弹起：聊天区直接占满剩余高度（tabbar 被键盘盖住，不必预留）——2026-09-28 微信式改造 */
  body.kb-open .workbench{height:calc(var(--vvh,100dvh) - var(--topbar-h))}
  body.kb-open .tutor{height:calc(var(--vvh,100dvh) - var(--topbar-h))}
  /* ===== 2026-09-28 二修（真机截图反馈：小桌子摆太满、消息只剩一条缝）=====
     ① 聊天页整页固定成"可视高度"，禁止页面整体滚动——根因是 .app{min-height:100vh}：
        键盘弹起后可视区只剩 ~500，页面仍被撑到 860，多出的 360 变成可滚动空间，
        用户一滑整页就动（截图里顶部工具栏"消失"就是这么来的）。
        只有消息区（.chat__flow）滚动，其余钉死。 */
  body:has(.workbench),body:has(.tutor){height:var(--vvh,100dvh);overflow:hidden}
  /* ② 键盘弹起时撤走用不着的"家具"，把空间全让给消息（微信同款做法）：
        底部导航 / 判卷提示行 / 快捷话术按钮——键盘收起后它们自动回来。 */
  body.kb-open .tabbar{display:none}
  body.kb-open .chat__input .foot{display:none}
  body.kb-open .quick-actions{display:none}
  /* 输入区：贴底、紧凑；textarea 16px 防 iOS 聚焦自动放大页面 */
  .chat__input{padding:10px 12px calc(10px + env(safe-area-inset-bottom))}
  .chat__input textarea{font-size:16px}
  .chat__flow{padding:16px 14px 18px;gap:15px;overflow-anchor:none}
  .learn-side{display:none}
  .learn-side.mobile{display:flex;position:fixed;top:var(--topbar-h);right:0;bottom:0;width:min(88vw,340px);z-index:90;box-shadow:var(--shadow-lg);transform:translateX(100%);animation:panelIn .28s var(--ease) forwards}
  @keyframes panelIn{to{transform:translateX(0)}}
  .panel-btn{display:inline-flex}
  .learn-side__close{display:inline-flex}
  .settings-layout{grid-template-columns:1fr}
  .set-nav{position:static;display:flex;gap:6px;overflow-x:auto;padding:8px}
  .set-nav button{flex:none;white-space:nowrap}
  .ria-head h1{font-size:21px}
  .chat__flow{max-width:100%}
  .chat__head{gap:8px;padding:12px 14px}
  .chat__head>div{flex:1;min-width:0}
  .chat__head b{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
  .chat__head small{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;display:block}
  .msg{max-width:92%}
}
@media (max-width:520px){
  .course-grid{grid-template-columns:1fr}
  .ria-seg__body{max-height:0}
  .ria-seg.open .ria-seg__body{max-height:2200px}
  .click-hint{display:none}
  .distill-input{padding:16px}
  .distill-opt{grid-template-columns:1fr}
  .distill-tabs button{font-size:12px;padding:8px 4px}
  .task-item__head{flex-wrap:wrap;padding:12px}
  .task-item__body-inner{padding:0 12px 14px}
  .pipe-legend{flex-wrap:wrap;justify-content:flex-start}
  .topbar__right{gap:6px}
  .topbar__inner{gap:10px;padding:0 12px}
  .user-chip{max-width:130px;padding:5px 8px 5px 6px}
  .user-chip__meta{min-width:0}
  .user-chip__meta b{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
  /* 2026-09-28 修复：以下三行原本因多处一个 } 漏在媒体查询外、变成全局生效，
     导致聊天标题下的小字（副标题）在所有设备被隐藏、头部图标/按钮被全局改小。
     现将它们收回到 520px 媒体查询内（本意就是只在手机小屏生效）。 */
  .chat__head small{display:none}
  .chat__head .m-ico{width:32px;height:32px}
  .chat__head .btn{padding:7px 10px;font-size:12px}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.01ms!important;transition-duration:.01ms!important}
}

/* ============================================================
   登录页 · 邀请码 / 图形验证码 / 密码可见切换
   ============================================================ */
.hint-note{font-size:11px;color:var(--muted);font-weight:400;margin-left:6px}
.pw{position:relative}
.pw .input{padding-right:46px}
.eye{
  position:absolute;top:50%;right:6px;transform:translateY(-50%);
  width:36px;height:36px;border-radius:8px;display:grid;place-items:center;
  color:var(--muted);transition:.2s;flex:none;
}
.eye:hover{color:var(--primary-strong);background:var(--surface-3)}
.eye svg{width:19px;height:19px}
.capbox{display:flex;align-items:stretch;gap:10px}
.cap-stage{flex:1;height:48px;border:1px solid var(--line-strong);border-radius:10px;overflow:hidden;background:#FFFBF3;display:flex;align-items:center;justify-content:center}
.cap-stage svg{display:block;max-width:100%;max-height:100%}
.cap-refresh{flex:none;padding:0 14px;border-radius:10px;border:1px solid var(--line-strong);background:var(--surface);font-size:12.5px;color:var(--primary-strong);font-weight:600;transition:.2s}
.cap-refresh:hover{border-color:var(--primary);color:var(--primary-strong)}

/* ===== 2026-10-05 手机导航修复（用户报障+真机验收通过，nav_test.html 测试端实测 80+ 项后并入）=====
   病灶：多处内容横向超宽 → 手机浏览器把版面放大再缩小 → position:fixed 的底栏漂到可视区外
   （用户观感="底下的模块点不动"）。逐条： */
/* ① 大厅 page-head 按钮组（inline flex 不换行，492px>390） */
.page-head__row > div[style*="display:flex"]{flex-wrap:wrap;min-width:0;max-width:100%}
/* ② 仪表盘任务卡长文本 nowrap（875px 一行）——只打没配 overflow 保护的那种 */
#view .card span[style*="white-space:nowrap"]:not([style*="overflow:hidden"]){
  white-space:normal !important;overflow-wrap:anywhere}
/* ③ 卡片详情页工具行（返回/去实践/实战任务/1-73 导航，416px） */
.card-detail__tools{flex-wrap:wrap;min-width:0}
.card-detail__tools .card-detail__nav{margin-left:auto}
/* ④ 设置页面板防御性收缩（报错长串保险） */
.settings-layout{min-width:0}
.settings-layout > .set-panel{min-width:0;overflow-x:auto;max-width:100%}
.set-panel #errList div{overflow-wrap:anywhere}
/* ⑤ 保险丝：任何元素不得把版面撑出横向缩放（根治 fixed 底栏漂移） */
body{overflow-x:clip}