:root{
  /* ---- 全局配色：月白底 · 黛蓝主色 · 中国红点缀 ---- */
  --bg:#F2F6FA;                 /* 月白 */
  --paper:#FFFFFF;              /* 星昭气泡 */
  --ink:#1A2A3A;                /* 深黛蓝正文 */
  --sub:#5A6B7D;
  --line:#E3EAF2;
  --navy:#2B4C7E;               /* 黛蓝 */
  --navy-2:#3E5F94;
  --red:#D32F2F;                /* 中国红 */
  --red-2:#B92626;
  --amber:#E9A23B;              /* 琥珀金 */
  --amber-2:#FFCE6B;
  --amber-grad:linear-gradient(135deg,#E9A23B 0%,#FFCE6B 100%);
  --shadow-blue:0 4px 18px rgba(43,76,126,.10);   /* 极淡黛蓝阴影 */
  --radius:16px;
}
*{margin:0;padding:0;box-sizing:border-box}
html,body{height:100%}
body{
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  background:var(--bg);color:var(--ink);overflow:hidden;
  -webkit-font-smoothing:antialiased;
}
/* 星轨暗纹：极淡的弧线与星点 */
body::before{
  content:"";position:fixed;inset:0;z-index:0;pointer-events:none;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='460' height='460'%3E%3Cg fill='none' stroke='%232B4C7E'%3E%3Ccircle cx='230' cy='230' r='160' stroke-opacity='.045' stroke-dasharray='3 11'/%3E%3Ccircle cx='230' cy='230' r='218' stroke-opacity='.035' stroke-dasharray='1.5 15'/%3E%3Cpath d='M20 400 Q 230 300 440 400' stroke-opacity='.035'/%3E%3C/g%3E%3Cg fill='%232B4C7E'%3E%3Ccircle cx='120' cy='88' r='1.6' fill-opacity='.07'/%3E%3Ccircle cx='338' cy='58' r='1.1' fill-opacity='.06'/%3E%3Ccircle cx='58' cy='306' r='1.3' fill-opacity='.06'/%3E%3Ccircle cx='392' cy='342' r='1.6' fill-opacity='.07'/%3E%3Ccircle cx='230' cy='52' r='1' fill-opacity='.05'/%3E%3Ccircle cx='408' cy='150' r='1' fill-opacity='.05'/%3E%3C/g%3E%3C/svg%3E");
}
/* 新页面在启动页之上（z-index 更高），从屏幕上方插入覆盖下来 */
#app{height:100vh;display:flex;flex-direction:column;position:relative;z-index:310;
  transform:translateY(-100vh)}
/* 不透明的背景层：页面滑下来时能完整盖住底下的启动壁纸 */
#app::before{
  content:"";position:absolute;inset:0;z-index:-1;pointer-events:none;
  background-color:var(--bg);
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='460' height='460'%3E%3Cg fill='none' stroke='%232B4C7E'%3E%3Ccircle cx='230' cy='230' r='160' stroke-opacity='.045' stroke-dasharray='3 11'/%3E%3Ccircle cx='230' cy='230' r='218' stroke-opacity='.035' stroke-dasharray='1.5 15'/%3E%3Cpath d='M20 400 Q 230 300 440 400' stroke-opacity='.035'/%3E%3C/g%3E%3Cg fill='%232B4C7E'%3E%3Ccircle cx='120' cy='88' r='1.6' fill-opacity='.07'/%3E%3Ccircle cx='338' cy='58' r='1.1' fill-opacity='.06'/%3E%3Ccircle cx='58' cy='306' r='1.3' fill-opacity='.06'/%3E%3Ccircle cx='392' cy='342' r='1.6' fill-opacity='.07'/%3E%3Ccircle cx='230' cy='52' r='1' fill-opacity='.05'/%3E%3Ccircle cx='408' cy='150' r='1' fill-opacity='.05'/%3E%3C/g%3E%3C/svg%3E");
}
#app.dropped{
  transform:translateY(0);
  transition:transform 1.15s cubic-bezier(.2,.86,.34,1.03);
}

/* ---------------- 转场：时青抓着绳子把页面放下来 ---------------- */
/* 图片顶部（绳子那一头）挂在新页面的下边缘、也就是交界线上，
   时青本人站在下面的旧页上，抓着绳子把新页面一路拉下来。 */
#rig{
  position:absolute;top:100%;left:50%;z-index:60;pointer-events:none;
  width:186px;margin-left:-52px;              /* 图内绳头对准屏幕中心 */
  opacity:0;transform:translateY(-22px);
}
#rig[hidden]{display:none}
#rig.in{opacity:1;transform:translateY(0);
  transition:opacity .3s ease,transform .7s cubic-bezier(.2,.9,.3,1.1)}
#rig.bye{opacity:0;transform:translateY(-80px) scale(.86);
  transition:opacity .38s ease,transform .55s ease-in}
.rdrop{width:100%;display:block;transform-origin:38% 4%;animation:rig-swing 1.15s ease-in-out}
/* 小人抓着绳子晃一下 */
@keyframes rig-swing{
  0%{transform:rotate(-6deg)}
  40%{transform:rotate(4deg)}
  70%{transform:rotate(-2deg)}
  100%{transform:rotate(0)}
}

/* ---------------- 启动壁纸 ---------------- */
#splash{
  position:fixed;inset:0;z-index:300;
  background:#0d1b2e url(/img/splash.jpg) center/cover no-repeat;
  display:flex;flex-direction:column;align-items:center;justify-content:flex-end;
  gap:14px;padding-bottom:7vh;
  transition:filter .9s ease,opacity .6s ease;
}
/* PPT 式插入：启动页留在原地，新页面从上方盖下来（旧页略微退后变暗） */
#splash.back{filter:brightness(.86)}
#splash.hide{opacity:0;pointer-events:none}
#splash.gone{display:none}
.s-foot{
  color:#fff;font-size:13px;letter-spacing:3px;
  text-shadow:0 1px 10px rgba(13,27,46,.55);
  animation:sfade 1.2s ease both;
}
.s-bar{width:190px;height:3px;border-radius:3px;background:rgba(255,255,255,.32);overflow:hidden}
.s-bar i{display:block;height:100%;width:42%;background:linear-gradient(90deg,rgba(255,255,255,.9),#fff);border-radius:3px;animation:loadbar 1.3s ease-in-out infinite}
@keyframes loadbar{0%{transform:translateX(-130%)}100%{transform:translateX(340%)}}
@keyframes sfade{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}

/* ---------------- 顶栏 ---------------- */
.topbar{
  flex:0 0 auto;height:54px;display:flex;align-items:center;justify-content:space-between;
  padding:0 20px;background:rgba(255,255,255,.9);backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);z-index:20;position:relative;
}
/* 待机呼吸灯：顶栏底部一条缓缓明灭的光线 */
.topbar::after{
  content:"";position:absolute;left:0;right:0;bottom:-1px;height:2px;
  background:linear-gradient(90deg,transparent,rgba(211,47,47,.45),transparent);
  background-size:60% 100%;background-repeat:no-repeat;background-position:center;
  animation:breathe-line 4.5s ease-in-out infinite;pointer-events:none;
}
@keyframes breathe-line{
  0%,100%{opacity:.25;transform:scaleX(.7)}
  50%{opacity:.9;transform:scaleX(1)}
}
.tline{flex:1}
.tools{display:flex;align-items:center;gap:8px}
.tbtn{
  border:1px solid var(--line);background:#fff;border-radius:999px;padding:7px 13px;
  font-size:12.5px;color:var(--sub);cursor:pointer;transition:.18s;white-space:nowrap;
}
.tbtn:hover{border-color:var(--navy);color:var(--navy);box-shadow:var(--shadow-blue)}
.tbtn.on{background:var(--navy);border-color:var(--navy);color:#fff}
.tbtn.on:hover{background:var(--navy-2)}
.tbtn.danger:hover{border-color:var(--red);color:var(--red)}

/* ---------------- 主体 ---------------- */
.main{flex:1;display:flex;min-height:0;position:relative}

/* 对话区 */
.chat{flex:1;display:flex;flex-direction:column;min-width:0}
.stream{flex:1;overflow-y:auto;overflow-x:hidden;padding:26px 26px 10px;scroll-behavior:smooth}
.stream::-webkit-scrollbar{width:8px}
.stream::-webkit-scrollbar-thumb{background:#d9e3ee;border-radius:8px}

.hello{max-width:720px;margin:6px auto 0}
.hello-t{font-size:22px;letter-spacing:.5px;margin-bottom:10px}
.hello-p{font-size:13.5px;color:var(--sub);line-height:1.85;margin-bottom:20px}
.qcard{
  background:linear-gradient(160deg,#FFFFFF,#F3F7FC);border:1px solid #D8E4F2;
  border-radius:var(--radius);padding:18px 20px;box-shadow:var(--shadow-blue);
}
.qtag{
  display:inline-block;font-size:11px;color:var(--navy);border:1px solid #D8E4F2;
  background:#fff;border-radius:6px;padding:2px 8px;margin-bottom:9px;
}
.qtext{font-size:15px;line-height:1.8;margin-bottom:14px;font-weight:600}
.qbtn{
  border:none;background:var(--red);color:#fff;border-radius:999px;padding:9px 18px;
  font-size:13px;cursor:pointer;transition:.18s;
}
.qbtn:hover{background:var(--amber-grad);color:#4A2C00;box-shadow:0 4px 14px rgba(233,162,59,.35)}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}
.chip{
  border:1px solid var(--line);background:#fff;border-radius:999px;padding:8px 14px;
  font-size:12.5px;color:var(--sub);cursor:pointer;transition:.15s;
}
.chip:hover{border-color:var(--amber);color:#8A5A00;background:#FFFDF5}

/* 消息 */
.msg{max-width:720px;margin:0 auto 20px;display:flex;gap:12px;animation:in .28s ease}
@keyframes in{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
.msg .av{
  flex:0 0 36px;height:36px;border-radius:50%;margin-top:2px;overflow:hidden;
  border:2px solid #fff;box-shadow:var(--shadow-blue);
}
.msg .av img{width:100%;height:100%;object-fit:cover;display:block}
.msg.me{justify-content:flex-end}
.bubble{
  max-width:82%;padding:14px 17px;border-radius:16px;font-size:14.5px;line-height:1.95;
  background:var(--paper);border:1px solid rgba(43,76,126,.08);
  box-shadow:var(--shadow-blue);
  white-space:pre-wrap;word-break:break-word;color:var(--ink);
}
/* 用户气泡：黛蓝底白字 */
.msg.me .bubble{background:var(--navy);border-color:var(--navy);color:#FFFFFF;box-shadow:0 4px 18px rgba(43,76,126,.22)}
.bubble .cursor{
  display:inline-block;width:7px;height:15px;background:var(--amber);
  vertical-align:-2px;margin-left:2px;animation:blink 1s steps(1) infinite;
}
@keyframes blink{0%,50%{opacity:1}51%,100%{opacity:0}}
/* 回答中：气泡边缘的声波与微光 */
.bubble.talking{position:relative;animation:glow-pulse 1.6s ease-in-out infinite}
@keyframes glow-pulse{
  0%,100%{box-shadow:var(--shadow-blue)}
  50%{box-shadow:0 0 0 3px rgba(43,76,126,.06),var(--shadow-blue)}
}
.wave{display:inline-flex;gap:2px;align-items:flex-end;height:13px;margin-left:7px;vertical-align:-2px}
.wave i{width:3px;height:5px;background:var(--navy);border-radius:2px;animation:wv .9s ease-in-out infinite}
.wave i:nth-child(2){animation-delay:.15s}
.wave i:nth-child(3){animation-delay:.3s}
@keyframes wv{0%,100%{height:4px;opacity:.6}50%{height:13px;opacity:1}}
/* 关联问题推荐 */
.sugg{margin-top:11px;padding-top:10px;border-top:1px dashed var(--line)}
.sugg-t{font-size:11.5px;color:var(--sub);margin-bottom:8px}
.sugg .chip{margin:0 6px 6px 0;font-size:12px;padding:6px 12px;display:inline-block}
.srcs{
  margin-top:9px;padding-top:9px;border-top:1px dashed var(--line);
  font-size:11.5px;color:var(--sub);line-height:1.7;
}
.srcs b{color:var(--navy);font-weight:600}
.srcs .warn{color:var(--amber)}
.rowact{margin-top:7px;display:flex;gap:8px}
.rowact button{border:none;background:transparent;color:var(--sub);font-size:11.5px;cursor:pointer;padding:2px 4px}
.rowact button:hover{color:var(--amber)}

/* 输入区 */
.composer{flex:0 0 auto;padding:10px 26px 18px;background:linear-gradient(to top,var(--bg) 70%,rgba(242,246,250,0))}
.status{
  height:18px;font-size:12px;color:var(--navy);margin-bottom:6px;
  max-width:720px;margin-left:auto;margin-right:auto;text-align:left;opacity:.9;
}
/* 检索中：数据流穿梭的细进度条 */
.status.flowing{height:3px;padding:0;margin-bottom:9px;border-radius:3px;overflow:hidden;
  background:linear-gradient(90deg,transparent,rgba(43,76,126,.28),transparent);
  background-size:220% 100%;animation:flow 1.15s linear infinite;text-indent:-9999px;
}
@keyframes flow{from{background-position:220% 0}to{background-position:-220% 0}}
.cbox{
  max-width:720px;margin:0 auto;display:flex;gap:10px;align-items:flex-end;
  background:#fff;border:1px solid var(--line);border-radius:14px;padding:10px 12px;
  box-shadow:var(--shadow-blue);transition:.18s;
  animation:breathe-glow 4.5s ease-in-out infinite;   /* 待机呼吸灯 */
}
@keyframes breathe-glow{
  0%,100%{box-shadow:0 0 0 0 rgba(43,76,126,0)}
  50%{box-shadow:0 0 16px 2px rgba(43,76,126,.13)}
}
.cbox:focus-within{border-color:var(--navy);animation:none;box-shadow:0 0 0 3px rgba(43,76,126,.08),var(--shadow-blue)}
#input{
  flex:1;border:none;outline:none;resize:none;font-size:14.5px;line-height:1.7;
  max-height:140px;color:var(--ink);background:transparent;
}
.send{
  flex:0 0 auto;border:none;background:var(--red);color:#fff;border-radius:10px;
  padding:9px 20px;font-size:13.5px;cursor:pointer;transition:.18s;
}
.send:hover{background:var(--amber-grad);color:#4A2C00;box-shadow:0 4px 14px rgba(233,162,59,.4)}
.send:disabled{background:#C7D2DF;color:#fff;cursor:default;box-shadow:none}

/* 虚拟形象 */
.avatar{
  flex:0 0 340px;border-left:1px solid var(--line);
  background:linear-gradient(170deg,#FDFEFF,#EFF4FA);
  display:flex;flex-direction:column;padding:16px;gap:14px;
}
.stage{
  position:relative;flex:1;min-height:300px;border-radius:var(--radius);
  background:radial-gradient(70% 55% at 50% 38%,#FFFFFF 0%,#F3F7FC 60%,#E7EEF7 100%);
  border:1px solid var(--line);overflow:hidden;
}
.halo{
  position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);
  width:78%;aspect-ratio:1;border-radius:50%;
  background:radial-gradient(circle,rgba(43,76,126,.10),rgba(43,76,126,0) 68%);
  animation:breathe 6s ease-in-out infinite;pointer-events:none;
}
@keyframes breathe{0%,100%{transform:translate(-50%,-50%) scale(1);opacity:.85}50%{transform:translate(-50%,-50%) scale(1.06);opacity:1}}
.l2d{position:absolute;inset:0}
.l2d canvas{display:block;width:100%!important;height:100%!important}
/* 检索中：环绕时青转圈的星星 */
.orbit{
  position:absolute;left:50%;top:50%;width:64%;aspect-ratio:1;
  transform:translate(-50%,-50%);animation:spin 5s linear infinite;pointer-events:none;
}
.orbit[hidden]{display:none}
.ostar{
  position:absolute;color:var(--amber);font-size:15px;
  text-shadow:0 0 6px rgba(233,162,59,.65);
  animation:twinkle 1.4s ease-in-out infinite;
}
.o1{top:-9px;left:50%;margin-left:-8px}
.o2{bottom:-2px;left:10%}
.o3{bottom:-2px;right:10%;animation-delay:.5s}
@keyframes spin{to{transform:translate(-50%,-50%) rotate(360deg)}}
@keyframes twinkle{0%,100%{opacity:.55;transform:scale(.85)}50%{opacity:1;transform:scale(1.15)}}
.state{
  position:absolute;left:12px;top:12px;font-size:11.5px;color:var(--navy);
  background:rgba(255,255,255,.92);border:1px solid var(--line);border-radius:8px;padding:4px 10px;
}
.loaderr{
  position:absolute;inset:14px;font-size:12px;color:#A33;background:#FFF6F6;
  border:1px solid #F3C9C9;border-radius:12px;padding:12px 14px;line-height:1.7;
}
.acard{
  flex:0 0 auto;background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:14px 16px;box-shadow:var(--shadow-blue);
}
.acard b{font-size:14px;display:block;margin-bottom:6px}
.acard p{font-size:12px;color:var(--sub);line-height:1.8}
.mmeta{margin-top:9px;font-size:11.5px;color:var(--amber)}

/* 会话抽屉 */
.drawer{
  position:absolute;left:0;top:0;bottom:0;width:280px;background:#fff;
  border-right:1px solid var(--line);transform:translateX(-100%);transition:transform .22s ease;
  display:flex;flex-direction:column;z-index:15;box-shadow:6px 0 24px rgba(43,76,126,.08);
}
.drawer.open{transform:none}
.dhead{
  flex:0 0 auto;height:52px;display:flex;align-items:center;justify-content:space-between;
  padding:0 14px;border-bottom:1px solid var(--line);font-size:13.5px;font-weight:600;
}
.dhead .x{border:none;background:transparent;font-size:20px;color:var(--sub);cursor:pointer;line-height:1}
.dlist{flex:1;overflow-y:auto;padding:8px}
.sitem{
  padding:10px 12px;border-radius:11px;cursor:pointer;margin-bottom:4px;
  border:1px solid transparent;transition:.15s;
}
.sitem:hover{background:#F4F8FC}
.sitem.active{background:#EDF3FA;border-color:#D8E4F2}
.sitem .t{font-size:13px;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.sitem .m{font-size:11px;color:var(--sub);margin-top:4px;display:flex;justify-content:space-between}
.sitem .del{border:none;background:transparent;color:#B8C4D2;cursor:pointer;font-size:12px}
.sitem .del:hover{color:var(--red)}
.dfoot{flex:0 0 auto;padding:10px;border-top:1px solid var(--line);display:flex;gap:8px}
.dfoot .tbtn{flex:1;text-align:center}

/* 接入弹窗（静态演示版） */
.mask{position:fixed;inset:0;background:rgba(26,42,58,.35);display:grid;place-items:center;z-index:99;animation:in .18s ease}
.dlg{width:420px;max-width:92vw;background:#fff;border-radius:16px;padding:22px;box-shadow:0 14px 44px rgba(43,76,126,.22)}
.dlg b{font-size:15px;display:block}
.dlg p{font-size:12.5px;color:var(--sub);line-height:1.85;margin:9px 0 13px}
.dlg input{width:100%;border:1px solid var(--line);border-radius:10px;padding:10px 12px;font-size:13px;outline:none;font-family:Consolas,monospace}
.dlg input:focus{border-color:var(--navy)}
.dlgfoot{display:flex;gap:8px;justify-content:flex-end;margin-top:14px}

/* ---------------- 移动端 ---------------- */
@media (max-width:900px){
  .main{flex-direction:column}
  .avatar{
    flex:0 0 auto;border-left:none;border-bottom:1px solid var(--line);
    flex-direction:row;gap:10px;padding:10px 12px;order:-1;
  }
  .stage{flex:0 0 120px;min-height:120px;width:120px}
  .acard{flex:1;min-width:0;padding:10px 12px}
  .acard p{display:none}
  .mmeta{margin-top:4px}
  .stream{padding:16px 14px 6px}
  .composer{padding:8px 14px 14px}
  .hello-t{font-size:19px}
}
@media (max-width:520px){
  .tbtn{padding:6px 9px;font-size:11.5px}
}

/* ---- ICP 备案条：贴页面最底部，淡灰小字，不抢视觉 ---- */
.icp{
  flex:0 0 auto;
  padding:6px 12px 10px;
  text-align:center;
  font-size:11.5px;
  line-height:1.5;
  color:var(--sub);
  opacity:.72;
  letter-spacing:.02em;
}
.icp a{color:inherit;text-decoration:none}
.icp a:hover{color:var(--navy);text-decoration:underline}
@media (max-width:520px){
  .icp{font-size:11px;padding:5px 10px 8px}
}