/* ══════════════════════════════════════════════════════════════════════════
   SocioVerse Research Workbench (v2) — design system
   Layout: left nav rail · center study view · right chat dock
   Language: warm paper + orange brand (homepage-aligned), glass, layered
   shadows, quiet motion. Series palette (validated): blue/teal/coral/purple/pink
   ══════════════════════════════════════════════════════════════════════════ */

:root{
  --bg:#f6f5f1; --surface:#ffffff; --surface-2:#f3f1ea; --surface-3:#ece9e0;
  --border:#e7e4da; --border-strong:#d9d5c9;
  --text:#23221f; --muted:#6c6a63; --faint:#9a988f;
  --accent:#e67e22; --accent-2:#f97316; --accent-bg:#fdf0e2;
  --grad-accent:linear-gradient(135deg,#e67e22,#f97316);
  --teal:#1d9e75; --teal-bg:#e1f5ee; --amber:#ba7517; --amber-bg:#faeeda;
  --purple:#534ab7; --purple-bg:#eeedfe; --pink:#d4537e; --pink-bg:#fbeaf0;
  --coral:#d85a30; --blue:#378ADD; --blue-bg:#e6f1fb;
  --shadow-s:0 1px 2px rgba(30,20,5,.04),0 4px 14px rgba(30,20,5,.05);
  --shadow-m:0 2px 4px rgba(30,20,5,.05),0 12px 32px rgba(30,20,5,.09);
  --shadow-l:0 6px 16px rgba(30,20,5,.07),0 24px 60px rgba(30,20,5,.13);
  --r-s:10px; --r-m:14px; --r-l:18px;
  /* --chat-w 是默认值；用户拖过边框后由 app.js 用内联 px 覆盖（见 initChatResize） */
  --rail-w:224px; --chat-w:clamp(420px,42vw,740px);
  --font:"DM Sans",-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
}
:root.dark{
  --bg:#161512; --surface:#201f1b; --surface-2:#2a2822; --surface-3:#343128;
  --border:#37342c; --border-strong:#45412f;
  --text:#ecebe5; --muted:#a3a199; --faint:#6f6e66;
  --accent:#f5a04c; --accent-2:#f97316; --accent-bg:#3a2611;
  --grad-accent:linear-gradient(135deg,#e88a35,#f97316);
  --teal:#5dcaa5; --teal-bg:#0c3329; --amber:#ef9f27; --amber-bg:#3a2a0a;
  --purple:#afa9ec; --purple-bg:#221f3a; --pink:#ed93b1; --pink-bg:#3a1626;
  --coral:#f0997b; --blue:#85b7eb; --blue-bg:#0c2a45;
  --shadow-s:0 1px 2px rgba(0,0,0,.25),0 4px 14px rgba(0,0,0,.28);
  --shadow-m:0 2px 4px rgba(0,0,0,.3),0 12px 32px rgba(0,0,0,.42);
  --shadow-l:0 6px 16px rgba(0,0,0,.35),0 24px 60px rgba(0,0,0,.5);
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;color:var(--text);
  font:14px/1.58 var(--font);
  -webkit-font-smoothing:antialiased;
  background:
    radial-gradient(1100px 720px at 86% -10%, color-mix(in srgb,var(--accent) 7%,transparent), transparent 60%),
    radial-gradient(950px 650px at -8% 110%, color-mix(in srgb,var(--teal) 6%,transparent), transparent 55%),
    var(--bg);
  overflow:hidden;
}
body::before{content:"";position:fixed;inset:0;pointer-events:none;z-index:0;
  background-image:radial-gradient(color-mix(in srgb,var(--text) 4.5%,transparent) 1px, transparent 1px);
  background-size:28px 28px;}
::selection{background:color-mix(in srgb,var(--accent) 22%,transparent)}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums}
.muted{color:var(--muted)} .faint{color:var(--faint)}
a{color:var(--accent)}
button{font:inherit;color:inherit;background:none;border:none;cursor:pointer;padding:0}
select{font:12.5px var(--font);color:var(--text);background:var(--surface);border:1px solid var(--border);
  border-radius:var(--r-s);padding:6px 9px;box-shadow:var(--shadow-s);transition:border-color .15s;max-width:100%}
select:hover{border-color:var(--accent)}
select:focus,textarea:focus,input:focus{outline:2px solid color-mix(in srgb,var(--accent) 45%,transparent);outline-offset:1px;border-color:var(--accent)}
::-webkit-scrollbar{width:9px;height:9px}
::-webkit-scrollbar-thumb{background:color-mix(in srgb,var(--muted) 30%,transparent);border-radius:99px;border:2px solid transparent;background-clip:content-box}
::-webkit-scrollbar-thumb:hover{background:color-mix(in srgb,var(--muted) 52%,transparent);background-clip:content-box}
::-webkit-scrollbar-track{background:transparent}

/* ── shell grid ─────────────────────────────────────────────────────────── */
#shell{position:relative;z-index:1;display:grid;height:100vh;
  grid-template-columns:var(--rail-w) minmax(0,1fr) var(--chat-w);
  transition:grid-template-columns .28s cubic-bezier(.4,0,.2,1);}
body.chat-hidden #shell{grid-template-columns:var(--rail-w) minmax(0,1fr) 0}
body.chat-hidden #chatDock{opacity:0;pointer-events:none}

/* ── rail ───────────────────────────────────────────────────────────────── */
#rail{display:flex;flex-direction:column;gap:10px;padding:16px 12px 12px;
  border-right:1px solid var(--border);min-width:0;
  background:color-mix(in srgb,var(--surface) 55%,transparent);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);}
.rail-brand{display:flex;align-items:center;gap:10px;padding:2px 6px;cursor:pointer;border-radius:var(--r-s)}
.rail-brand:hover .logo{transform:translateY(-1px) scale(1.05)}
.logo{width:34px;height:34px;border-radius:11px;background:var(--grad-accent);color:#fff;
  display:flex;align-items:center;justify-content:center;font-weight:700;font-size:16px;
  box-shadow:0 3px 10px rgba(230,126,34,.35);transition:transform .18s,box-shadow .18s;flex:0 0 auto}
.brand-txt{min-width:0}
.brand-name{font-weight:700;font-size:14.5px;letter-spacing:-.35px;line-height:1.15}
.brand-name .b2{background:var(--grad-accent);-webkit-background-clip:text;background-clip:text;color:transparent;font-weight:800;font-size:1.14em;margin-left:1.5px}
.brand-sub{font-size:9.5px;color:var(--faint);letter-spacing:.8px;text-transform:uppercase}
.rail-study{padding:0 2px}
.rail-study select{width:100%;font-size:12px;text-overflow:ellipsis}
/* 新研究入口：rail 的主行动按钮（研究切换器之下、导航之上） */
.rail-new{display:flex;align-items:center;justify-content:center;gap:7px;margin:0 2px;
  padding:9px 10px;border-radius:11px;background:var(--grad-accent);color:#fff;
  font-size:13px;font-weight:650;letter-spacing:.2px;text-decoration:none;user-select:none;
  box-shadow:0 3px 10px rgba(230,126,34,.32);transition:transform .15s,box-shadow .15s}
.rail-new:hover{color:#fff;transform:translateY(-1px);box-shadow:0 6px 16px rgba(230,126,34,.42)}
.rail-new .rn-ic{font-size:15px;line-height:1;flex:0 0 auto}
/* 导览结束后的一次性提示：按钮呼吸 + 右侧气泡 */
.rail-new.hintpulse{animation:newpulse 1.6s ease-in-out 5}
@keyframes newpulse{0%,100%{box-shadow:0 3px 10px rgba(230,126,34,.32)}
  50%{box-shadow:0 0 0 8px color-mix(in srgb,var(--accent) 26%,transparent)}}
#newHint{position:fixed;z-index:520;max-width:236px;background:var(--text);color:var(--bg);
  font-size:12px;line-height:1.55;padding:10px 13px;border-radius:12px;box-shadow:var(--shadow-l);
  cursor:pointer;animation:rise .32s cubic-bezier(.22,.9,.36,1) both}
#newHint::before{content:"";position:absolute;left:-6px;top:16px;width:12px;height:12px;
  background:var(--text);transform:rotate(45deg);border-radius:2px}
#newHint b{color:var(--accent-2);font-weight:700}
#newHint .nh-x{display:block;margin-top:6px;font-size:11px;opacity:.6}
#nav{position:relative;display:flex;flex-direction:column;gap:2px;margin-top:2px;flex:1 1 auto;overflow-y:auto;padding:2px}
.nav-it{position:relative;display:flex;align-items:center;gap:10px;padding:9px 10px;border-radius:11px;
  cursor:pointer;color:var(--muted);font-size:13px;font-weight:500;user-select:none;
  transition:background .15s,color .15s;z-index:1}
.nav-it:hover{background:color-mix(in srgb,var(--surface-2) 80%,transparent);color:var(--text)}
.nav-it.on{color:var(--accent);font-weight:600}
.nav-it .ic{width:19px;height:19px;flex:0 0 auto;display:flex;align-items:center;justify-content:center}
.nav-it .ic svg{width:18px;height:18px;stroke:currentColor;fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.nav-it .nm{flex:1 1 auto;min-width:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.nav-it .bdg{flex:0 0 auto;display:flex;align-items:center;justify-content:center;min-width:17px;height:17px}
.nav-ind{position:absolute;left:2px;right:2px;height:38px;border-radius:11px;z-index:0;
  background:var(--accent-bg);box-shadow:inset 0 0 0 1px color-mix(in srgb,var(--accent) 22%,transparent);
  transition:transform .26s cubic-bezier(.34,1.3,.5,1),opacity .2s;opacity:0}
.nav-ind.show{opacity:1}
/* nav 状态徽标 */
.nb{width:15px;height:15px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:9px;font-weight:700;box-sizing:border-box}
.nb.done{background:var(--teal);color:#fff}
.nb.run{background:var(--accent);color:#fff;animation:ringpulse 1.6s ease-out infinite}
.nb.await{background:var(--amber);color:#fff;animation:ringpulse-a 1.6s ease-out infinite}
.nb.stale{background:var(--coral);color:#fff}
.nb.review{border:1.6px solid var(--amber);color:var(--amber)}
.nb.pend{border:1.6px solid var(--border-strong);color:transparent}
.nb.dot{width:7px;height:7px;background:var(--teal)}
.rail-foot{display:flex;gap:5px;align-items:center;padding:6px 2px 0;border-top:1px solid var(--border)}
.rf-btn{flex:1 1 0;display:flex;align-items:center;justify-content:center;height:30px;border-radius:9px;
  border:1px solid var(--border);background:var(--surface);color:var(--muted);font-size:12.5px;cursor:pointer;
  text-decoration:none;transition:all .15s;user-select:none}
.rf-btn:hover{border-color:var(--accent);color:var(--accent);transform:translateY(-1px)}
/* 悬停标签（data-tip，见 app.js initTips）：fixed 定位，不受 rail 层叠上下文影响 */
#tipBox{position:fixed;left:0;top:-999px;z-index:9999;pointer-events:none;opacity:0;
  transition:opacity .13s ease;background:var(--text);color:var(--bg);font-size:11.5px;
  line-height:1.35;padding:5px 9px;border-radius:7px;white-space:nowrap;
  box-shadow:0 4px 14px rgba(30,20,5,.18);font-weight:500}
#tipBox.on{opacity:.96}
.rf-btn.accent{color:var(--accent);font-weight:700}
.rail-quota{font-size:9.5px;color:var(--faint);text-align:center;padding:2px 0 0;cursor:default}
.rail-quota-btn{font-size:10px;color:var(--accent);text-align:center;padding:3px 0 0;cursor:pointer;
  user-select:none;transition:opacity .14s;font-weight:600}
.rail-quota-btn:hover{opacity:.75}
.rail-quota-btn.dis{color:var(--faint);cursor:default;font-weight:400}
#qrOverlay{position:fixed;inset:0;background:rgba(0,0,0,.38);z-index:650;display:flex;align-items:center;justify-content:center;padding:20px}
@media(max-width:1240px){.rail-quota-btn{display:none!important}}

/* ── topbar ─────────────────────────────────────────────────────────────── */
#main{display:flex;flex-direction:column;min-width:0;height:100vh}
#topbar{display:flex;justify-content:space-between;align-items:center;gap:14px;
  padding:13px 22px;border-bottom:1px solid var(--border);
  background:color-mix(in srgb,var(--bg) 80%,transparent);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);z-index:5}
.tb-left{min-width:0}
.tb-titlerow{display:flex;align-items:center;gap:10px;min-width:0}
#topbar h1{font-size:16.5px;font-weight:700;letter-spacing:-.2px;margin:0;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:46vw}
.tb-badges{display:flex;flex-wrap:wrap;gap:6px;margin-top:5px;min-height:0}
.tb-right{display:flex;gap:8px;align-items:center;flex:0 0 auto}
.tb-right select{max-width:190px;text-overflow:ellipsis}
.tb-btn{width:34px;height:34px;border-radius:10px;border:1px solid var(--border);background:var(--surface);
  color:var(--muted);font-size:15px;display:flex;align-items:center;justify-content:center;
  box-shadow:var(--shadow-s);transition:all .15s}
.tb-btn:hover{border-color:var(--accent);color:var(--accent);transform:translateY(-1px)}
.pill{font-size:11px;padding:2.5px 10px;border-radius:100px;display:inline-flex;align-items:center;gap:5px;
  white-space:nowrap;font-weight:500;background:var(--surface-2);color:var(--muted)}
.dot{width:8px;height:8px;border-radius:50%;display:inline-block}
.pulse{animation:pulse 1.4s ease-in-out infinite}

/* ── view ───────────────────────────────────────────────────────────────── */
#view{flex:1 1 auto;overflow-y:auto;overflow-x:hidden;padding:18px 22px 46px;scroll-behavior:smooth}
#view:focus{outline:none}
.vgrid{display:grid;gap:14px}
.g2{grid-template-columns:repeat(2,minmax(0,1fr))}
.g3{grid-template-columns:repeat(3,minmax(0,1fr))}
.g4{grid-template-columns:repeat(4,minmax(0,1fr))}
@media(max-width:1500px){.g4{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:1100px){.g2,.g3{grid-template-columns:1fr}.g4{grid-template-columns:repeat(2,minmax(0,1fr))}}
.span2{grid-column:span 2}
@media(max-width:1100px){.span2{grid-column:span 1}}

/* cards */
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--r-m);
  padding:16px 18px;box-shadow:var(--shadow-s);transition:box-shadow .18s;min-width:0}
.card:hover{box-shadow:var(--shadow-m)}
.card.flat:hover{box-shadow:var(--shadow-s)}
/* 入场动画只在 body.anim（真正的 tab/研究切换）时播放——SSE 数据刷新的重建不闪 */
body.anim .rise{animation:rise .38s cubic-bezier(.22,.9,.36,1) both;animation-delay:calc(var(--i,0)*45ms)}
@keyframes rise{from{opacity:0;transform:translateY(9px)}to{opacity:1;transform:none}}
.lbl{font-size:10.5px;color:var(--faint);letter-spacing:1.2px;text-transform:uppercase;margin-bottom:9px;
  font-weight:600;font-family:var(--mono);display:flex;align-items:center;gap:6px}
.lbl::before{content:"";width:7px;height:7px;border-radius:50%;border:1.5px solid var(--teal);
  box-shadow:0 0 0 2.5px color-mix(in srgb,var(--teal) 16%,transparent);flex:0 0 auto}
.lbl .lbl-r{margin-left:auto;text-transform:none;letter-spacing:0;font-family:var(--font);font-weight:400}
.card h3{font-size:13.5px;font-weight:650;margin:0 0 8px}
.kv{font-size:13.2px;margin:6px 0;color:var(--muted);line-height:1.65}
.kv b{color:var(--text);font-weight:600}
.chips{display:flex;flex-wrap:wrap;gap:6px}
.chip{font-size:11px;color:var(--muted);background:var(--surface-2);padding:3px 10px;border-radius:100px;transition:all .13s}
.chip b{color:var(--text)}
.btn{display:inline-flex;align-items:center;gap:6px;font-size:12.5px;padding:7px 14px;border-radius:10px;
  border:1px solid var(--border);background:var(--surface);color:var(--text);cursor:pointer;
  box-shadow:var(--shadow-s);transition:all .15s;font-weight:500;text-decoration:none;user-select:none}
.btn:hover{border-color:var(--accent);color:var(--accent);transform:translateY(-1px);box-shadow:var(--shadow-m)}
.btn.primary{background:var(--grad-accent);color:#fff;border:none;font-weight:600;box-shadow:0 3px 10px rgba(230,126,34,.3)}
.btn.primary:hover{color:#fff;transform:translateY(-1px);box-shadow:0 6px 16px rgba(230,126,34,.4)}
.btn.sm{font-size:11.5px;padding:4px 10px;border-radius:8px}
.btn:disabled{opacity:.45;pointer-events:none}

/* stat tiles */
.stat{display:flex;flex-direction:column;gap:3px;padding:14px 16px}
.stat .sl{font-size:11px;color:var(--muted);font-weight:500;display:flex;align-items:center;gap:6px;min-width:0}
.stat .sl .sname{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.stat .sv{font-size:24px;font-weight:700;letter-spacing:-.4px;line-height:1.2;display:flex;align-items:baseline;gap:6px;flex-wrap:wrap}
.stat .sv .unit{font-size:11.5px;color:var(--faint);font-weight:500}
.stat .sd{font-size:11px;color:var(--faint)}
.stat .spark{margin-top:5px}
.skey{width:8px;height:8px;border-radius:3px;flex:0 0 auto}

/* pipeline stage rail (overview) — 柔和渐变节点 + 静默文字（完成态不写"完成"，勾自己说话） */
.pipe{display:flex;align-items:flex-start;gap:0;overflow-x:auto;padding:8px 2px 0}
.pnode{display:flex;flex-direction:column;align-items:center;gap:7px;min-width:88px;cursor:pointer;
  padding:6px 8px 6px;border-radius:12px;transition:background .15s}
.pnode:hover{background:color-mix(in srgb,var(--surface-2) 70%,transparent)}
.pnode .nm{font-size:12.5px;font-weight:650;color:var(--faint);letter-spacing:.2px;white-space:nowrap;
  transition:color .15s}
.pnode.st-done .nm{color:var(--text)}
.pnode.on .nm{color:var(--accent)}
.pnode .sub{font-size:9.5px;min-height:13px;line-height:13px;color:var(--faint);white-space:nowrap;
  font-family:var(--mono);letter-spacing:.2px}
.pnode.st-stale .sub{color:var(--coral)}
.pnode.st-review .sub,.pnode.st-inherited .sub,.pnode.await .sub{color:var(--amber)}
.pnode.running .sub{color:var(--accent)}
.snode{width:32px;height:32px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  font-size:12.5px;font-weight:600;box-sizing:border-box;font-family:var(--mono);transition:transform .16s}
.pnode:hover .snode{transform:translateY(-1.5px) scale(1.06)}
.sn-done{background:linear-gradient(135deg,#2cb98c,var(--teal));color:#fff;
  box-shadow:0 2px 8px color-mix(in srgb,var(--teal) 38%,transparent),inset 0 1px 0 rgba(255,255,255,.28)}
.sn-pend{background:var(--surface);border:1.5px solid var(--border-strong);color:var(--faint)}
.sn-active{background:var(--surface);border:2px solid var(--accent);color:var(--accent)}
.sn-run{background:var(--grad-accent);color:#fff;box-shadow:0 2px 8px rgba(230,126,34,.4)}
.sn-await{background:linear-gradient(135deg,#dd9d2e,var(--amber));color:#fff;font-family:var(--font);
  box-shadow:0 2px 8px color-mix(in srgb,var(--amber) 45%,transparent)}
.sn-stale{background:linear-gradient(135deg,#e0764c,var(--coral));color:#fff;
  box-shadow:0 2px 8px color-mix(in srgb,var(--coral) 38%,transparent)}
.sn-review{background:var(--surface);border:2px solid var(--amber);color:var(--amber)}
.sn-inherit{background:var(--surface);border:2px dashed color-mix(in srgb,var(--amber) 70%,var(--border));color:var(--muted)}
.sn-skip{background:transparent;border:1.5px dashed var(--border);color:var(--faint)}
body.anim .sn-done{animation:snpop .45s cubic-bezier(.34,1.5,.55,1) both;animation-delay:calc(var(--i,0)*60ms)}
@keyframes snpop{from{transform:scale(.55);opacity:.3}to{transform:scale(1);opacity:1}}
.ring-pulse{animation:ringpulse 1.6s ease-out infinite}
.pconn{flex:1 0 20px;height:3px;background:var(--border);border-radius:3px;margin-top:20.5px}
.pconn.done{background:linear-gradient(90deg,color-mix(in srgb,var(--teal) 75%,transparent),
  color-mix(in srgb,var(--teal) 40%,var(--border)))}

/* timeline (environment) */
.tl{position:relative;padding-left:20px;margin:4px 0}
.tl::before{content:"";position:absolute;left:6px;top:6px;bottom:6px;width:2px;border-radius:2px;
  background:linear-gradient(var(--border-strong),var(--border))}
.tl-it{position:relative;padding:7px 0 7px 8px}
.tl-it::before{content:"";position:absolute;left:-19px;top:13px;width:10px;height:10px;border-radius:50%;
  background:var(--surface);border:2.5px solid var(--accent);box-shadow:0 0 0 3px color-mix(in srgb,var(--accent) 14%,transparent)}
.tl-it.bc::before{border-color:var(--purple);box-shadow:0 0 0 3px color-mix(in srgb,var(--purple) 14%,transparent)}
.tl-it .t-step{font-size:10.5px;font-weight:700;color:var(--accent);font-family:var(--mono)}
.tl-it.bc .t-step{color:var(--purple)}
.tl-it .t-txt{font-size:12.5px;color:var(--text);margin-top:1px;line-height:1.55}
.tl-it .t-sub{font-size:11px;color:var(--faint);margin-top:1px}

/* env layers */
.layer{display:flex;align-items:center;gap:10px;padding:9px 12px;border:1px solid var(--border);
  border-radius:11px;margin:7px 0;background:color-mix(in srgb,var(--surface-2) 45%,transparent);transition:all .15s}
.layer:hover{border-color:var(--border-strong);transform:translateX(2px)}
.layer .l-ic{width:30px;height:30px;border-radius:9px;display:flex;align-items:center;justify-content:center;
  background:var(--blue-bg);color:var(--blue);font-size:14px;flex:0 0 auto}
.layer .l-nm{font-weight:600;font-size:12.5px}
.layer .l-ax{font-size:10.5px;color:var(--faint);font-family:var(--mono)}

/* ── grounding（参考来源）卡：basis 比例条 + 分段切换 + 证据卡 ── */
.gratio{display:flex;align-items:center;gap:8px}
.gratio .grbar{display:flex;height:7px;border-radius:99px;overflow:hidden;width:110px;gap:1.5px;background:var(--surface-2)}
.gratio .grbar i{height:100%;border-radius:2px}
.gratio .grn{font-size:10px;color:var(--faint);font-family:var(--mono)}
.gseg{display:flex;gap:6px;margin:0 0 11px;flex-wrap:wrap}
.gseg .gs{font-size:11px;padding:3.5px 11px;border-radius:99px;border:1px solid var(--border);
  color:var(--muted);cursor:pointer;user-select:none;transition:all .14s;background:var(--surface)}
.gseg .gs b{font-weight:650;color:inherit}
.gseg .gs:hover{border-color:var(--accent);color:var(--accent)}
.gseg .gs.on{background:var(--accent-bg);border-color:color-mix(in srgb,var(--accent) 45%,var(--border));color:var(--accent);font-weight:600}
.gpane[hidden]{display:none}
.gfact{position:relative;padding:8px 11px 8px 15px;border-radius:10px;margin:7px 0;
  background:color-mix(in srgb,var(--surface-2) 42%,transparent);transition:background .14s}
.gfact:hover{background:color-mix(in srgb,var(--surface-2) 75%,transparent)}
.gfact::before{content:"";position:absolute;left:5px;top:9px;bottom:9px;width:3px;border-radius:3px;background:var(--faint)}
.gfact.b-sourced::before{background:var(--teal)}
.gfact.b-proxy::before{background:var(--amber)}
.gfact.b-assumed::before{background:var(--border-strong)}
.gf-main{font-size:12.8px;line-height:1.55;color:var(--text);overflow-wrap:anywhere}
.gf-val{font-family:var(--mono);font-weight:700;font-variant-numeric:tabular-nums}
.b-sourced .gf-val{color:var(--teal)} .b-proxy .gf-val{color:var(--amber)} .b-assumed .gf-val{color:var(--muted)}
.gf-asof{font-size:10.5px;color:var(--faint)}
.gf-meta{display:flex;flex-wrap:wrap;gap:5px 8px;align-items:center;margin-top:4px;font-size:10.5px}
.gf-basis{padding:1px 8px;border-radius:99px;font-weight:600;font-size:9.5px;letter-spacing:.3px}
.b-sourced .gf-basis{background:var(--teal-bg);color:var(--teal)}
.b-proxy .gf-basis{background:var(--amber-bg);color:var(--amber)}
.b-assumed .gf-basis{background:var(--surface-2);color:var(--muted)}
.gf-via{padding:1px 7px;border-radius:99px;background:var(--surface-2);color:var(--faint);font-family:var(--mono);font-size:9px}
.gf-src{color:var(--accent);text-decoration:none;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:100%;font-size:10.5px}
.gf-src:hover{text-decoration:underline}
.gf-note{font-size:11px;color:var(--faint);margin-top:3px;line-height:1.5;overflow-wrap:anywhere}
.gref{display:flex;gap:9px;padding:7px 4px;border-bottom:1px solid color-mix(in srgb,var(--border) 55%,transparent);font-size:12.5px;line-height:1.55}
.gref:last-child{border-bottom:none}
.gref .gr-ic{flex:0 0 auto;width:24px;height:24px;border-radius:7px;background:var(--blue-bg);color:var(--blue);
  display:flex;align-items:center;justify-content:center;font-size:11px}
.gref .gr-take{color:var(--muted);font-size:11.5px;margin-top:1px}
.gasm{position:relative;padding:6px 4px 6px 14px;font-size:12px;color:var(--muted);line-height:1.55;overflow-wrap:anywhere}
.gasm .ga-r{overflow-wrap:anywhere}
.gasm::before{content:"";position:absolute;left:2px;top:9px;bottom:9px;width:0;border-left:2px dashed var(--border-strong)}
.gasm .ga-r{font-size:10.5px;color:var(--faint);margin-top:1px}

/* ── 模型设计卡：B=f(P,E) 视觉公式 + 指标色键行 ── */
.bfpe{font-family:var(--mono);font-size:21px;font-weight:600;letter-spacing:.5px;display:flex;
  align-items:center;gap:4px;padding:10px 0 4px;color:var(--faint)}
.bfpe .bt{width:34px;height:34px;border-radius:10px;display:inline-flex;align-items:center;justify-content:center;
  font-size:16.5px;font-weight:700;margin:0 2px}
.bfpe .bt.b{background:var(--accent-bg);color:var(--accent);box-shadow:inset 0 0 0 1.5px color-mix(in srgb,var(--accent) 35%,transparent)}
.bfpe .bt.p{background:var(--amber-bg);color:var(--amber);box-shadow:inset 0 0 0 1.5px color-mix(in srgb,var(--amber) 35%,transparent)}
.bfpe .bt.e{background:var(--teal-bg);color:var(--teal);box-shadow:inset 0 0 0 1.5px color-mix(in srgb,var(--teal) 35%,transparent)}
.bfpe-leg{display:flex;flex-wrap:wrap;gap:5px 14px;font-size:11px;color:var(--muted);padding:2px 0 10px}
.bfpe-leg span{display:inline-flex;align-items:center;gap:5px;cursor:pointer;transition:color .14s}
.bfpe-leg span:hover{color:var(--text)}
.bfpe-leg i{width:8px;height:8px;border-radius:3px}
.mrow{display:flex;align-items:baseline;gap:8px;padding:5.5px 6px;border-radius:8px;font-size:12.5px;
  line-height:1.5;transition:background .13s}
.mrow:hover{background:var(--surface-2)}
.mrow.msel{cursor:pointer;user-select:none}
.mrow.msel:hover .mkey{transform:scale(1.35)}
.mrow .mkey{transition:transform .13s}
.stat-link{cursor:pointer}
.stat-link:hover{transform:translateY(-2px);box-shadow:var(--shadow-m)}
.stat-link:hover .sv{color:var(--accent)}
.charttt .tevent{font-size:10.5px;color:var(--amber);margin:-1px 0 4px;padding-bottom:4px;
  border-bottom:1px dashed color-mix(in srgb,var(--amber) 35%,transparent);max-width:220px;white-space:normal;line-height:1.45}
.mrow .mkey{flex:0 0 8px;width:8px;height:8px;border-radius:50%;align-self:center;box-sizing:border-box}
.mrow .mname{font-family:var(--mono);font-weight:600;font-size:11.5px;color:var(--text);white-space:nowrap}
.mrow .mdesc{color:var(--muted);min-width:0}

/* data table */
.dtable-wrap{overflow-x:auto;border:1px solid var(--border);border-radius:11px;max-width:100%}
table.dtable{border-collapse:separate;border-spacing:0;font-size:12px;width:100%;min-width:480px}
.dtable th{position:sticky;top:0;background:var(--surface-2);font-weight:600;color:var(--muted);
  font-size:11px;text-align:left;padding:7px 12px;border-bottom:1px solid var(--border);white-space:nowrap}
.dtable td{padding:6px 12px;border-bottom:1px solid var(--border);font-variant-numeric:tabular-nums;
  white-space:nowrap;max-width:300px;overflow:hidden;text-overflow:ellipsis}
.dtable tr:last-child td{border-bottom:none}
.dtable tbody tr{transition:background .12s}
.dtable tbody tr:hover{background:color-mix(in srgb,var(--accent-bg) 50%,transparent)}
.dtable td.num{text-align:right;font-family:var(--mono);font-size:11.5px}

/* file rows */
.frow{display:flex;align-items:center;gap:10px;padding:7px 10px;border-radius:9px;font-size:12.5px;transition:background .13s}
.frow:hover{background:var(--surface-2)}
.frow .f-ic{width:26px;height:26px;border-radius:8px;display:flex;align-items:center;justify-content:center;
  font-size:12px;flex:0 0 auto;background:var(--surface-2);color:var(--muted)}
.frow .f-nm{flex:1 1 auto;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-weight:500}
.frow .f-meta{font-size:10.5px;color:var(--faint);font-family:var(--mono);flex:0 0 auto}
.frow .f-act{opacity:0;transition:opacity .15s;display:flex;gap:4px}
.frow:hover .f-act{opacity:1}

/* experiment cards */
.exp{position:relative;border:1px solid var(--border);border-radius:var(--r-m);padding:13px 15px;
  background:var(--surface);box-shadow:var(--shadow-s);transition:all .18s;cursor:pointer}
.exp:hover{box-shadow:var(--shadow-m);transform:translateY(-2px)}
.exp.on{border-color:var(--accent);box-shadow:0 0 0 1.5px color-mix(in srgb,var(--accent) 40%,transparent),var(--shadow-s)}
.exp .e-id{font-family:var(--mono);font-size:10.5px;color:var(--faint)}
.exp .e-nm{font-weight:650;font-size:13px;margin:3px 0 5px;line-height:1.4}
.exp .e-meta{display:flex;flex-wrap:wrap;gap:5px;font-size:10.5px;color:var(--faint)}
.exp .e-tag{position:absolute;top:11px;right:12px}

/* agents（分析实验 tab 内） */
.aggrid{display:grid;grid-template-columns:200px minmax(0,1fr);gap:16px}
@media(max-width:1100px){.aggrid{grid-template-columns:130px minmax(0,1fr)}}
.aglist{max-height:min(56vh,520px);overflow:auto;display:flex;flex-direction:column;gap:2px}
.ag{padding:6px 10px;border-radius:9px;cursor:pointer;font-size:12.5px;display:flex;flex-direction:column;gap:1px;transition:background .13s}
.ag:hover{background:var(--surface-2)}
.ag.sel{background:var(--accent-bg);color:var(--accent);box-shadow:inset 2.5px 0 0 var(--accent)}
.ag .ag-kv{font-size:10px;color:var(--faint);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-family:var(--mono)}
.ag.sel .ag-kv{color:var(--accent)}
.agdetail{max-height:min(56vh,520px);overflow:auto;padding-right:4px}
.agreason{font-size:12.5px;color:var(--text);font-style:italic;margin:0 0 11px;padding:7px 11px;
  background:var(--surface-2);border-radius:10px;border-left:2.5px solid var(--accent);line-height:1.55}
.agreason.sm{font-size:11.5px;margin:0 0 5px;padding:4px 8px;border-radius:8px}
.agstep{border-left:2px solid var(--border);padding:5px 0 9px 12px;margin-left:3px}
.agleg{display:flex;flex-wrap:wrap;gap:3px 12px;font-size:11px;color:var(--muted);margin:4px 0 9px}
.agtrack-row{display:flex;align-items:center;gap:8px;margin-top:7px}
.agtrack-lbl{flex:0 0 30%;max-width:30%;font-size:11px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.agtrack{display:flex;gap:1px;flex:1 1 auto;height:12px;border-radius:3px;overflow:hidden}
.agtrack-cell{flex:1 1 0}
.agtrack-leg{display:flex;flex-wrap:wrap;gap:2px 9px;margin:3px 0 2px 30%;font-size:10px;color:var(--faint)}
.agax{height:auto;background:none;overflow:visible}
.agax-cell{background:none;font-size:9px;color:var(--faint);text-align:center;line-height:1.2}
.agraw{margin-top:11px;border-top:1px solid var(--border);padding-top:9px}
.agraw summary{font-size:11px;color:var(--muted);cursor:pointer;user-select:none}
.agraw summary:hover{color:var(--text)}

/* population distribution */
.popdist{display:flex;flex-direction:column;gap:11px;margin-top:4px}
.pd-row{display:flex;gap:11px;align-items:flex-start}
.pd-attr{flex:0 0 30%;max-width:30%;font-size:11.5px;color:var(--muted);word-break:break-word;padding-top:1px;line-height:1.35}
.pd-num,.pd-cat{flex:1 1 auto;min-width:0}
.pd-hist{display:flex;align-items:flex-end;gap:2px;height:30px}
.pd-bar{flex:1 1 0;background:var(--amber);border-radius:2.5px 2.5px 0 0;min-height:2px;opacity:.82;transition:opacity .13s}
.pd-hist:hover .pd-bar{opacity:.5}
.pd-hist .pd-bar:hover{opacity:1}
.pd-scale{display:flex;justify-content:space-between;font-size:10px;color:var(--faint);margin-top:3px;font-variant-numeric:tabular-nums}
.pd-scale .pd-med{color:var(--amber);font-weight:600}
.pd-const{font-size:12px;color:var(--muted);padding-top:3px}
.pd-const b{color:var(--text)}
.pd-stack{display:flex;height:16px;border-radius:5px;overflow:hidden;background:var(--surface-2);gap:2px}
.pd-seg{background:var(--amber);height:100%;transition:filter .13s}
.pd-seg:hover{filter:brightness(1.12)}
.pd-seg.pd-other{background:var(--muted);opacity:.35}
.pd-legend{display:flex;flex-wrap:wrap;gap:3px 11px;margin-top:5px;font-size:10.5px;color:var(--muted)}
.pd-leg b{color:var(--text);font-weight:600}

/* chart & legend（dataviz 规范） */
.chartbox{position:relative}
.chartbox svg{display:block}
#chartTT,.charttt{position:absolute;display:none;pointer-events:none;z-index:5;background:var(--surface);
  border:1px solid var(--border);border-radius:10px;box-shadow:var(--shadow-m);
  padding:7px 10px;font-size:11.5px;min-width:120px;max-width:240px}
.charttt .tstep{font-weight:700;font-size:11px;color:var(--muted);margin-bottom:4px;font-family:var(--mono)}
.charttt .trow{display:flex;align-items:center;gap:6px;padding:1.5px 0;white-space:nowrap}
.charttt .tkey{width:12px;height:2.5px;border-radius:2px;flex:0 0 auto}
.charttt .tval{font-family:var(--mono);font-variant-numeric:tabular-nums;font-weight:600;margin-left:auto;padding-left:10px}
.charttt .tname{color:var(--muted);overflow:hidden;text-overflow:ellipsis;max-width:110px}
.legend{display:flex;flex-wrap:wrap;gap:6px;align-items:center;font-size:11px;margin-top:8px}
.legitem{cursor:pointer;user-select:none;display:inline-flex;align-items:center;gap:5px;
  border:1px solid var(--border);border-radius:999px;padding:2.5px 10px;transition:all .13s;background:var(--surface-2)}
.legitem:hover{border-color:var(--accent);background:var(--accent-bg)}
.legitem .ldot{width:8px;height:8px;border-radius:50%;flex:0 0 auto;box-sizing:border-box}

/* markdown 阅读态 */
.md{font-size:13.5px;line-height:1.75;letter-spacing:.1px;overflow-wrap:break-word}
.md p{margin:.55em 0}
.md h1{font-size:17px;font-weight:700;letter-spacing:-.2px;margin:.5em 0 .4em}
.md h2{font-size:14.5px;font-weight:700;margin:1.15em 0 .45em;padding-bottom:.25em;border-bottom:1px solid var(--border)}
.md h3{font-size:13.5px;font-weight:600;margin:.9em 0 .3em}
.md ul,.md ol{margin:.4em 0;padding-left:20px}
.md li{margin:.22em 0}
.md blockquote{margin:.6em 0;padding:.4em .9em;border-left:3px solid var(--accent);background:var(--surface-2);border-radius:0 8px 8px 0;color:var(--muted)}
.md code{background:var(--surface-2);padding:.1em .35em;border-radius:5px;font-size:.92em;font-family:var(--mono)}
.md pre{display:block;overflow-x:auto;max-width:100%;background:var(--surface-2);border-radius:9px;padding:9px 12px}
.md table{display:table;width:100%;border-radius:10px;border:1px solid var(--border);border-collapse:separate;border-spacing:0;font-variant-numeric:tabular-nums;font-size:12px;margin:6px 0}
.md td,.md th{border:none;border-bottom:1px solid var(--border);padding:5px 12px;text-align:right}
.md th{background:var(--surface-2);font-weight:600;color:var(--muted);font-size:11.5px}
.md tr:last-child td{border-bottom:none}
.md tbody tr:nth-child(even) td{background:color-mix(in srgb,var(--surface-2) 45%,transparent)}
.md strong,.md b{font-weight:650}
.mdfig{margin:8px 0;cursor:zoom-in;display:inline-block;max-width:100%}
.mdfig img{max-width:100%;max-height:280px;border-radius:9px;border:1px solid var(--border);display:block}
.mdfig .cap{font-size:11px;color:var(--faint);margin-top:3px;font-family:var(--mono)}
.mdfig:hover .cap{color:var(--accent)}
.figmiss{margin:8px 0;padding:12px 14px;border:1.5px dashed var(--border-strong);border-radius:10px;
  font-size:12px;color:var(--faint);background:color-mix(in srgb,var(--surface-2) 55%,transparent)}

/* figures carousel */
.figwrap{text-align:center}
.figwrap img{max-width:100%;border-radius:10px;border:1px solid var(--border);cursor:zoom-in}
.lightbox{position:fixed;inset:0;background:rgba(0,0,0,.82);display:none;align-items:center;justify-content:center;
  z-index:400;cursor:zoom-out;padding:28px;flex-direction:column;gap:10px}
.lightbox img{max-width:96%;max-height:90%;border-radius:8px;background:#fff}
.lightbox .cap{color:#eee;font-size:12px;font-family:var(--mono)}

/* empty states & skeletons */
.empty{display:flex;flex-direction:column;align-items:center;gap:10px;padding:34px 16px;text-align:center}
.empty .e-ic{width:46px;height:46px;border-radius:14px;background:var(--surface-2);display:flex;align-items:center;justify-content:center;font-size:20px}
.empty .e-t{font-weight:600;font-size:13.5px}
.empty .e-s{font-size:12px;color:var(--muted);max-width:400px;line-height:1.6}
.skel{border-radius:9px;background:linear-gradient(100deg,var(--surface-2) 40%,color-mix(in srgb,var(--surface) 70%,transparent) 50%,var(--surface-2) 60%);
  background-size:200% 100%;animation:shimmer 1.3s linear infinite}
@keyframes shimmer{to{background-position:-200% 0}}

/* progress bar */
.track{height:6px;background:var(--surface-2);border-radius:100px;overflow:hidden;margin-top:6px}
.fill{height:100%;background:var(--grad-accent);border-radius:100px;transition:width .5s cubic-bezier(.22,.9,.36,1)}

/* feed */
.fe{display:flex;gap:9px;align-items:baseline;font-size:12.5px;padding:5px 0}
.fe .t{color:var(--faint);font-size:11px;min-width:58px;font-family:var(--mono)}

/* ══ chat dock ══ */
#chatDock{position:relative;display:flex;flex-direction:column;min-width:0;height:100vh;border-left:1px solid var(--border);
  background:color-mix(in srgb,var(--surface) 62%,transparent);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  padding:12px 14px 12px;transition:opacity .2s}
/* 左边框拖拽改宽（app.js initChatResize 写内联 --chat-w，双击复位） */
#chatResize{position:absolute;left:-4px;top:0;bottom:0;width:9px;cursor:col-resize;z-index:30}
#chatResize::before{content:"";position:absolute;left:3px;top:0;bottom:0;width:3px;border-radius:3px;
  background:transparent;transition:background .15s}
#chatResize:hover::before,body.resizing #chatResize::before{background:color-mix(in srgb,var(--accent) 60%,transparent)}
body.resizing{cursor:col-resize;user-select:none}
body.resizing #shell{transition:none}
body.chat-hidden #chatResize,body.compose #chatResize{display:none}
@media(max-width:980px){#chatResize{display:none}}
#chatHead{display:flex;align-items:center;gap:8px;padding-bottom:9px;border-bottom:1px solid var(--border);margin-bottom:8px}
.ch-title{font-weight:650;font-size:13px;white-space:nowrap}
#chatBusy{font-weight:400;font-size:11px}
.ch-study{flex:1 1 auto;min-width:0;font-size:10.5px;color:var(--faint);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;text-align:right}
.vseg{display:inline-flex;gap:1.5px;background:var(--surface-2);border-radius:8px;padding:2px;flex:0 0 auto}
.vseg i{font-style:normal;font-size:10px;padding:2px 7px;border-radius:6px;cursor:pointer;color:var(--faint);
  user-select:none;transition:all .13s;line-height:1.4}
.vseg i:hover{color:var(--text)}
.vseg i.on{background:var(--surface);color:var(--accent);font-weight:650;box-shadow:var(--shadow-s)}
/* 「详」档：工具行可就地展开完整入参 */
.tooldetail details{width:100%}
.tooldetail summary{cursor:pointer;user-select:none;list-style:none}
.tooldetail summary::-webkit-details-marker{display:none}
.tooldetail summary::before{content:"▸";display:inline-block;width:11px;color:var(--faint);transition:transform .12s}
.tooldetail details[open] summary::before{transform:rotate(90deg)}
.tooldetail summary:hover{color:var(--text)}
.tooldetail pre{margin:5px 0 2px 11px;padding:7px 9px;background:var(--surface-2);
  border-left:2px solid var(--border);border-radius:0 var(--r-s) var(--r-s) 0;
  font:11.5px/1.5 var(--mono);color:var(--muted);white-space:pre-wrap;word-break:break-word;
  max-height:280px;overflow:auto}
.ch-collapse{width:26px;height:26px;border-radius:8px;color:var(--muted);font-size:13px;display:flex;align-items:center;justify-content:center;transition:all .15s;flex:0 0 auto}
.ch-collapse:hover{background:var(--surface-2);color:var(--text)}
#chatFab{position:fixed;right:18px;bottom:18px;z-index:120;width:48px;height:48px;border-radius:50%;
  background:var(--grad-accent);color:#fff;font-size:19px;box-shadow:0 6px 20px rgba(230,126,34,.45);
  display:flex;align-items:center;justify-content:center;transition:transform .18s}
#chatFab:hover{transform:translateY(-2px) scale(1.05)}
.fab-badge{position:absolute;top:-3px;right:-3px;min-width:17px;height:17px;border-radius:99px;background:var(--amber);
  color:#fff;font-size:10px;font-weight:700;display:flex;align-items:center;justify-content:center;padding:0 4px;
  animation:pulse 1.4s ease-in-out infinite}
#chatLog{flex:1;overflow-y:auto;overflow-x:hidden;padding:4px 2px 8px;display:flex;flex-direction:column;gap:10px;overflow-anchor:none}
.cmsg{min-width:0;font-size:13.5px;line-height:1.6;overflow-wrap:break-word}
.cmsg .md{overflow-x:auto;font-size:13.5px}
.cmsg .md pre{padding-bottom:2px}
.cmsg.user{align-self:flex-end;max-width:85%;padding:7px 12px;border-radius:14px;border-bottom-right-radius:5px;
  background:var(--grad-accent);color:#fff;box-shadow:0 3px 10px rgba(230,126,34,.28)}
.cmsg.user a{color:#fff}
.cmsg.assistant{align-self:stretch;max-width:100%;padding:0 2px}
.cline{font-size:12px;color:var(--muted);padding:0 2px;display:flex;gap:6px;align-items:baseline;flex-wrap:wrap}
.cline.err{color:var(--coral)}
.cline .mono{color:var(--text)}
.typing{display:inline-flex;gap:4px;padding:2px 2px;align-items:center}
.typing i{width:6px;height:6px;border-radius:50%;background:var(--faint);animation:pulse 1.2s ease-in-out infinite}
.typing i:nth-child(2){animation-delay:.2s}.typing i:nth-child(3){animation-delay:.4s}
.cchip{align-self:flex-start;cursor:pointer;font-size:11.5px;padding:3px 10px;border-radius:100px;border:1px solid transparent;transition:filter .13s}
.cchip:hover{filter:brightness(.92)}
.cgate{align-self:stretch;border:1.5px solid var(--amber);border-radius:14px;padding:10px 12px;background:var(--amber-bg);
  box-shadow:0 0 0 3px color-mix(in srgb,var(--amber) 14%,transparent);animation:gateglow 1.6s ease-in-out infinite}
.cgate .gatehead{display:flex;align-items:center;gap:7px;font-size:12px;color:var(--amber);font-weight:700;
  padding-bottom:7px;margin-bottom:4px;border-bottom:1px dashed color-mix(in srgb,var(--amber) 35%,transparent)}
.cgate .gatehead .gsub{font-weight:400;color:var(--muted);font-size:11.5px}
.cgate.done{opacity:.65;border-color:var(--border);background:var(--surface-2);box-shadow:none;animation:none}
.cgate.done .gatehead{color:var(--muted)}
.cgate .q{font-size:13px;font-weight:600;margin:4px 0 6px}
.cgate label{display:flex;gap:7px;align-items:flex-start;font-size:12.5px;padding:4px 2px;cursor:pointer}
.cgate .desc{color:var(--muted);font-size:11.5px}
.cgate input[type=text]{width:100%;font:12.5px var(--font);border:1px solid var(--border);border-radius:7px;padding:5px 8px;background:var(--surface);color:var(--text);margin-top:3px}
.cgate textarea{display:block;width:100%;font:12.5px/1.5 var(--font);border:1px solid var(--border);border-radius:7px;
  padding:5px 8px;background:var(--surface);color:var(--text);margin-top:3px;resize:none;overflow:hidden;
  min-height:30px;max-height:140px;box-sizing:border-box}
.cgate .sub{margin-top:8px;font-size:12.5px;padding:6px 15px;border-radius:9px;border:none;background:var(--amber);color:#fff;cursor:pointer;font-weight:600}
#gatePin{display:none;align-items:center;gap:8px;background:var(--amber);color:#fff;border-radius:10px;
  padding:8px 12px;font-size:12.5px;font-weight:600;cursor:pointer;margin-bottom:8px;animation:flash 1.4s ease-in-out infinite}
#gatePin .arrow{margin-left:auto;font-weight:400;font-size:11.5px;opacity:.9}
#replyHint{display:none;font-size:11.5px;color:var(--amber);padding:4px 2px 0}
#quickRow{display:flex;flex-wrap:wrap;gap:5px;padding:6px 0 0}
.qa{font-size:11px;color:var(--muted);border:1px dashed var(--border-strong);border-radius:100px;padding:3px 10px;
  cursor:pointer;transition:all .14s;user-select:none;background:color-mix(in srgb,var(--surface) 55%,transparent)}
.qa:hover{color:var(--accent);border-color:var(--accent);background:var(--accent-bg)}
#chatInputRow{display:flex;gap:8px;margin-top:9px;align-items:flex-end}
.attach-btn{flex:0 0 auto;width:34px;height:34px;border-radius:10px;border:1px solid var(--border);background:var(--surface);color:var(--muted);font-size:15px;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .15s}
.attach-btn:hover{color:var(--accent);border-color:var(--accent)}
#dropHint{border:2px dashed var(--accent);border-radius:12px;padding:14px;text-align:center;color:var(--accent);font-size:13px;margin-top:8px;background:var(--accent-bg)}
#chatDock.dragging #dropHint{display:block!important}
#chatInput{flex:1;font:13px var(--font);color:var(--text);background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:9px 11px;resize:none;max-height:120px;line-height:1.45;transition:border-color .15s}
#chatInput.glow{border-color:var(--accent);animation:inputGlow 1.8s ease-in-out infinite}
#chatSend{font-size:13px;padding:9px 16px;border-radius:11px;border:none;background:var(--grad-accent);color:#fff;cursor:pointer;white-space:nowrap;font-weight:600;box-shadow:0 3px 10px rgba(230,126,34,.3);transition:all .15s}
#chatSend:hover{transform:translateY(-1px);box-shadow:0 6px 16px rgba(230,126,34,.4)}
#chatSend:disabled{opacity:.5;cursor:default}

/* ══ 组稿态（新研究未发首条消息）：左 rail 保留，中栏与右栏合成一个居中输入框 ══
   刻意不新建一套 DOM —— 复用同一个 #chatDock，发出第一条消息后去掉 body.compose
   就自然回到左中右三栏，历史消息、SSE 订阅、上传拖拽全都不用重挂。 */
#composeHero,#composeStarters{display:none}
/* 两列而不是「三列中间设 0」：#main display:none 后它就不再是网格项，
   #chatDock 会自动落到第 2 条轨道上——中间轨道设 0 的写法会把对话栏压成一条缝。 */
body.compose #shell{grid-template-columns:var(--rail-w) minmax(0,1fr)}
body.compose #main{display:none}
body.compose #chatDock{border-left:none;background:transparent;backdrop-filter:none;-webkit-backdrop-filter:none;
  padding:0 26px;justify-content:center;align-items:center;overflow-y:auto}
body.compose #chatHead,body.compose #chatLog,body.compose #quickRow{display:none}
body.compose #composeHero,body.compose #composeStarters{display:block}
body.compose #chatInputRow{width:100%;max-width:760px;margin-top:0;gap:10px}
body.compose #chatInput{min-height:76px;max-height:240px;font-size:15px;line-height:1.6;
  padding:14px 16px;border-radius:16px;box-shadow:var(--shadow-m);background:var(--surface)}
body.compose .attach-btn{width:40px;height:40px;border-radius:12px}
body.compose #chatSend{padding:11px 20px;border-radius:13px;font-size:14px}
.ch-hero{width:100%;max-width:760px;text-align:center;padding:0 4px 22px}
.ch-hero .chh-logo{width:46px;height:46px;border-radius:15px;background:var(--grad-accent);color:#fff;
  display:flex;align-items:center;justify-content:center;font-weight:700;font-size:22px;margin:0 auto 14px;
  box-shadow:0 5px 18px rgba(230,126,34,.36)}
.ch-hero h2{font-size:23px;font-weight:700;letter-spacing:-.4px;margin:0 0 9px}
.ch-hero p{font-size:13px;line-height:1.75;color:var(--muted);margin:0 auto;max-width:560px}
#composeStarters{width:100%;max-width:760px;padding:14px 4px 0}
.cs-lbl{font-size:10.5px;color:var(--faint);letter-spacing:1.1px;text-transform:uppercase;
  font-family:var(--mono);margin-bottom:8px;text-align:center}
.cs-grid{display:grid;gap:8px;grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}
.cs-card{text-align:left;font-size:12.5px;line-height:1.6;color:var(--muted);cursor:pointer;
  border:1px solid var(--border);border-radius:13px;padding:10px 13px;background:var(--surface);
  box-shadow:var(--shadow-s);transition:all .15s}
.cs-card:hover{border-color:var(--accent);color:var(--text);transform:translateY(-2px);box-shadow:var(--shadow-m)}
.cs-card b{display:block;font-size:12px;font-weight:650;color:var(--accent);margin-bottom:3px}
@media(max-width:980px){
  body.compose #shell{grid-template-columns:56px minmax(0,1fr)}
  body.compose #chatDock{position:static;width:auto;box-shadow:none;transform:none}
  body.compose #chatFab{display:none!important}
  .ch-hero h2{font-size:19px}
}

/* toasts */
#toasts{position:fixed;bottom:20px;left:50%;transform:translateX(-50%);z-index:500;display:flex;flex-direction:column;gap:8px;align-items:center;pointer-events:none}
.toast{background:var(--surface);border:1px solid var(--border);border-radius:11px;box-shadow:var(--shadow-l);
  padding:9px 16px;font-size:12.5px;animation:rise .3s cubic-bezier(.22,.9,.36,1) both;pointer-events:auto}
.toast.ok{border-color:color-mix(in srgb,var(--teal) 45%,var(--border))}
.toast.err{border-color:color-mix(in srgb,var(--coral) 45%,var(--border))}

/* guide overlay */
#guideOverlay{position:fixed;inset:0;background:rgba(0,0,0,.35);z-index:600;display:flex;align-items:center;justify-content:center;padding:20px}
.guide-card{background:var(--bg);border:1px solid var(--border);border-radius:18px;max-width:430px;padding:22px 24px;box-shadow:var(--shadow-l)}
.guide-card h3{font-size:16px;margin:0 0 10px}
.guide-card p{font-size:13.5px;line-height:1.7;color:var(--muted);margin:0 0 16px}
.guide-row{display:flex;justify-content:space-between;align-items:center;gap:10px}
.guide-ok{font-size:13px;padding:8px 18px;border:none;border-radius:9px;background:var(--grad-accent);color:#fff;cursor:pointer;font-weight:600}
.guide-never{font-size:12px;color:var(--faint);cursor:pointer;background:none;border:none;text-decoration:underline}

/* ── guidance tour ── */
#tourOv{position:fixed;inset:0;z-index:800}
.tour-dim{position:absolute;inset:0;background:rgba(0,0,0,.45)}
.tour-hole{position:absolute;border-radius:14px;box-shadow:0 0 0 9999px rgba(0,0,0,.45);
  outline:2px solid var(--accent);outline-offset:2px;transition:all .25s cubic-bezier(.4,0,.2,1);pointer-events:none}
.tour-card{position:absolute;width:380px;max-width:92vw;background:var(--bg);border:1px solid var(--border);
  border-radius:16px;box-shadow:var(--shadow-l);padding:16px 18px;animation:rise .3s cubic-bezier(.22,.9,.36,1)}
.tour-card h3{font-size:15px;margin:2px 0 8px}
.tour-card p{font-size:12.8px;line-height:1.7;color:var(--muted);margin:0 0 10px}
.tour-n{font-size:9.5px;color:var(--faint);letter-spacing:.8px;text-transform:uppercase}
.tour-row{display:flex;gap:8px;align-items:center;margin-top:10px}
.tour-skip{font-size:11px;color:var(--faint);cursor:pointer;text-decoration:underline}
.tour-skip:hover{color:var(--muted)}
/* .tq-q / .tq-opts 由额度申请卡片（chat.js openQuotaCard）复用，别跟着导览问卷一起删 */
.tq-q{font-size:12.5px;font-weight:650;margin:8px 0 5px}
.tq-opts{display:flex;flex-wrap:wrap;gap:5px}
.tq-opts label{display:inline-flex;align-items:center;gap:5px;font-size:12px;border:1px solid var(--border);
  border-radius:99px;padding:4px 11px;cursor:pointer;transition:all .13s;user-select:none}
.tq-opts label:hover{border-color:var(--accent)}
.tq-opts input{accent-color:var(--accent);margin:0}
.tq-opts label:has(input:checked){background:var(--accent-bg);border-color:color-mix(in srgb,var(--accent) 45%,var(--border));color:var(--accent);font-weight:600}
.tour-video{display:inline-block;font-size:12.5px;font-weight:600;margin:2px 0 4px}

/* 每 tab 顶部说明条 */
.tabintro{display:flex;align-items:baseline;gap:8px;font-size:12px;color:var(--muted);line-height:1.6;
  background:color-mix(in srgb,var(--accent-bg) 55%,transparent);border:1px solid color-mix(in srgb,var(--accent) 18%,var(--border));
  border-radius:11px;padding:8px 12px;margin-bottom:14px}
.tabintro .ti-x{margin-left:auto;font-style:normal;cursor:pointer;color:var(--faint);font-size:11px;flex:0 0 auto}
.tabintro .ti-x:hover{color:var(--text)}

/* notes / callouts */
.note{margin:10px 0 0;padding:9px 12px;border-radius:10px;font-size:12.5px;line-height:1.6}
.note.amber{background:var(--amber-bg);color:var(--amber)}
.note.coral{background:var(--surface-2);color:var(--coral)}
.note.muted{background:var(--surface-2);color:var(--muted)}
.note code{background:color-mix(in srgb,var(--surface) 60%,transparent);padding:.1em .35em;border-radius:5px;font-family:var(--mono)}

/* ── animations ─────────────────────────────────────────────────────────── */
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.35}}
@keyframes flash{0%,100%{opacity:1}50%{opacity:.55}}
@keyframes gateglow{0%,100%{box-shadow:0 0 0 3px color-mix(in srgb,var(--amber) 10%,transparent)}50%{box-shadow:0 0 0 5px color-mix(in srgb,var(--amber) 26%,transparent)}}
@keyframes ringpulse{0%{box-shadow:0 0 0 0 color-mix(in srgb,var(--accent) 40%,transparent)}100%{box-shadow:0 0 0 10px transparent}}
@keyframes ringpulse-a{0%{box-shadow:0 0 0 0 color-mix(in srgb,var(--amber) 45%,transparent)}100%{box-shadow:0 0 0 10px transparent}}
@keyframes inputGlow{0%,100%{box-shadow:0 0 0 0 rgba(230,126,34,0)}50%{box-shadow:0 0 0 4px rgba(230,126,34,.22)}}
::view-transition-old(root){animation:vt-out .16s ease both}
::view-transition-new(root){animation:vt-in .2s ease both}
@keyframes vt-out{to{opacity:0}}
@keyframes vt-in{from{opacity:0;transform:translateY(5px)}}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}
}

/* ── responsive ─────────────────────────────────────────────────────────── */
@media(max-width:1240px){
  :root{--rail-w:62px}
  .brand-txt,.rail-study,.nav-it .nm,.rail-new .rn-tx{display:none}
  .rail-new{padding:9px 0}
  .nav-it{justify-content:center;padding:10px 0}
  .nav-it .bdg{position:absolute;top:3px;right:7px}
  .rail-foot{flex-direction:column}
  .rail-quota{display:none!important}
  #topbar h1{max-width:34vw}
}
@media(max-width:980px){
  #shell{grid-template-columns:56px minmax(0,1fr) 0}
  #chatDock{position:fixed;right:0;top:0;bottom:0;width:min(94vw,420px);z-index:200;
    box-shadow:var(--shadow-l);background:var(--bg)}
  body.chat-hidden #chatDock{transform:translateX(100%);opacity:1}
  #chatDock{transition:transform .28s cubic-bezier(.4,0,.2,1)}
  #view{padding:14px 14px 40px}
  #topbar{padding:10px 14px;flex-wrap:wrap}
  #topbar h1{max-width:100%;font-size:15px;white-space:normal;line-height:1.35}
  .tb-badges .pill{max-width:70vw;overflow:hidden;text-overflow:ellipsis}
  .tb-right{flex-wrap:wrap;justify-content:flex-end}
  .tb-right select{max-width:44vw;font-size:11.5px}
}