:root{
  --bg:#f6f6f7;
  --card:#ffffff;
  --border:#e9e9ee;
  --text:#18181b;
  --text2:#5f5f68;
  --text3:#a0a0aa;
  --accent:#0f766e;
  --accent-soft:#eefaf7;
  --btn:#18181b;
  --radius:14px;
  --sans:-apple-system,BlinkMacSystemFont,"SF Pro Text","Segoe UI",Roboto,"Helvetica Neue","PingFang SC","Microsoft YaHei",sans-serif;
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent;}
html,body{margin:0;padding:0;}
body{
  background-color:var(--bg);
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='3' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.05'/%3E%3C/svg%3E");
  color:var(--text);font-family:var(--sans);line-height:1.6;-webkit-font-smoothing:antialiased;
}
body::before{
  content:"TravelHere";
  position:fixed;top:50%;left:50%;transform:translate(-50%,-50%);
  font-size:54px;font-weight:700;letter-spacing:-.03em;color:#000;opacity:0.04;
  z-index:0;pointer-events:none;white-space:nowrap;
}
.wrap{max-width:520px;margin:0 auto;padding:44px 20px calc(16px + env(safe-area-inset-bottom));position:relative;z-index:1;}
[hidden]{display:none !important;}
button{font-family:inherit;cursor:pointer;}

/* ---------- 通用 ---------- */
.topbar{margin-bottom:36px;}
.brand{font-size:13px;font-weight:600;letter-spacing:.02em;color:var(--text3);}
h1.head{font-size:30px;line-height:1.28;font-weight:700;letter-spacing:-.02em;margin:0 0 12px;}
.sub{font-size:15px;color:var(--text2);margin:0 0 32px;line-height:1.7;}

.back{
  flex:none;align-self:flex-start;text-align:left;
  border:none;background:none;color:var(--text3);font-size:14px;
  padding:0 0 2px;margin-bottom:22px;display:inline-block;
}
.back:active{color:var(--text);}
.seal{
  width:100%;border:none;border-radius:var(--radius);padding:17px;font-size:16px;font-weight:600;
  background:var(--btn);color:#fff;transition:transform .06s ease,opacity .12s ease;
}
.seal:active{opacity:.86;transform:scale(.995);}
.seal.big{padding:20px;font-size:17px;}
.link-btn{
  display:block;width:100%;text-align:center;border:none;background:none;color:var(--text3);
  font-size:14px;padding:12px;font-weight:500;
}
.link-btn:active{color:var(--text);}
.actions{display:flex;flex-direction:column;gap:12px;margin-top:28px;}
.hint{font-size:13px;color:#b0493f;margin:8px 0 0;}

/* 切页动效 */
@keyframes screenIn{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}
.anim{animation:screenIn .28s ease both}

.ask-entry{
  display:block;width:100%;margin-top:40px;padding:14px;border-radius:var(--radius);
  border:none;background:none;color:var(--text3);font-size:14px;font-weight:500;
}
.ask-entry:active{color:var(--text);}

/* ---------- 状态选择 ---------- */
.q-label{font-size:14px;font-weight:600;color:var(--text);margin:22px 0 10px;}
.opts{display:flex;flex-wrap:wrap;gap:8px;}
.opt{
  border:1px solid var(--border);background:var(--card);border-radius:999px;padding:8px 16px;
  font-size:14px;color:var(--text2);font-weight:500;
}
.opt.on{border-color:var(--accent);color:var(--accent);background:var(--accent-soft);font-weight:600;}

/* ---------- 级联向导 ---------- */
.steps{display:flex;gap:6px;margin-bottom:28px;}
.steps span{width:8px;height:8px;border-radius:50%;background:var(--border);transition:background .2s;}
.steps span.on{background:var(--accent);}
.back-step{border:none;background:none;color:var(--text3);font-size:14px;padding:0;margin:0 0 18px;display:inline-block;}
.back-step:active{color:var(--text);}
.step-block{min-height:120px;}

/* ---------- 撑满一屏的子页 ---------- */
#screen-home,#screen-assign,#screen-doing,#screen-feedback,#screen-response{
  display:flex;flex-direction:column;
  min-height:calc(100vh - 60px);
  min-height:calc(100dvh - 60px - env(safe-area-inset-bottom));
}
.center-body{flex:1;display:flex;flex-direction:column;justify-content:center;padding:24px 0;}

/* ---------- 指派 ---------- */
.assign-greet{font-family:Georgia,"Songti SC","Noto Serif SC",serif;font-size:18px;color:var(--text2);margin:0 0 20px;text-align:center;}
.assign-card{
  width:100%;
  background:var(--card);
  border:1px solid var(--border);
  border-radius:20px;
  padding:26px 22px 22px;
  box-shadow:0 2px 14px -8px rgba(0,0,0,.10);
  display:flex;flex-direction:column;align-items:center;text-align:center;
}
.assign-card.cardIn{animation:cardIn .35s ease both;}
@keyframes cardIn{from{opacity:0;transform:scale(.96)}to{opacity:1;transform:none}}
.assign-tag{font-size:12px;font-weight:600;letter-spacing:.1em;color:var(--accent);text-transform:uppercase;}
.sense-icon{
  width:68px;height:68px;display:flex;align-items:center;justify-content:center;
  font-size:36px;background:#f4f4f5;border-radius:22px;margin:16px 0 18px;
}
.assign-text{
  font-family:Georgia,"Songti SC","Noto Serif SC",serif;
  font-size:20px;line-height:1.85;color:var(--text);margin:0;
}
.assign-meta{display:flex;gap:8px;margin-top:20px;}
.assign-meta span{font-size:12px;color:var(--text3);background:#f4f4f5;border-radius:999px;padding:5px 12px;}
.answer{
  background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:26px 24px;
  font-size:20px;line-height:1.85;font-weight:500;letter-spacing:-.01em;
}
.spinner{flex:1;display:flex;align-items:center;justify-content:center;padding:60px 0;color:var(--text3);font-size:14px;}
.assign-zone{flex:1;display:flex;flex-direction:column;}

/* ---------- 去做 ---------- */
.wander-hint{font-size:26px;font-weight:700;letter-spacing:-.02em;margin:0 0 16px;}
.wander-sub{font-size:15px;color:var(--text2);line-height:1.9;margin:0;}

/* ---------- 反馈 ---------- */
.return-head{font-size:26px;font-weight:700;letter-spacing:-.02em;margin:0 0 6px;}
.return-q{font-size:14px;font-weight:600;color:var(--text);margin:26px 0 12px;}
.state-opts{display:flex;flex-wrap:wrap;gap:10px;}
.state-btn{
  flex:1;border:1px solid var(--border);background:var(--card);border-radius:var(--radius);
  padding:13px 10px;font-size:14px;font-weight:500;color:var(--text2);white-space:nowrap;
}
.state-btn.on{border-color:var(--accent);color:var(--accent);background:var(--accent-soft);font-weight:600;}
.ta{
  width:100%;border:1px solid var(--border);border-radius:var(--radius);padding:14px 16px;min-height:64px;
  font-size:15px;font-family:var(--sans);background:var(--card);color:var(--text);resize:none;line-height:1.7;
}
.ta:focus{outline:none;border-color:var(--accent);}

/* ---------- 回应 ---------- */
#screen-response .center-body{padding-top:40px;}

/* ---------- 直接问我 ---------- */
.overlay{position:fixed;inset:0;background:rgba(24,24,27,.5);display:flex;align-items:flex-end;justify-content:center;z-index:50;}
.ask-panel{width:100%;max-width:520px;background:var(--bg);border-radius:20px 20px 0 0;padding:22px 20px 32px;}
.ask-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:14px;font-size:15px;font-weight:600;color:var(--text);}
.ask-close{border:none;background:none;font-size:24px;color:var(--text3);line-height:1;}
.ask-panel textarea{
  width:100%;border:1px solid var(--border);border-radius:var(--radius);padding:14px 16px;min-height:76px;
  font-size:15px;font-family:var(--sans);background:var(--card);color:var(--text);resize:none;
}
.ask-panel textarea:focus{outline:none;border-color:var(--accent);}
.ask-row{margin-top:12px;display:flex;justify-content:flex-end;}
.ask-panel .go{border:none;border-radius:var(--radius);padding:12px 26px;font-size:15px;font-weight:600;background:var(--btn);color:#fff;}
.answer-box{margin-top:14px;padding:16px;background:var(--card);border:1px solid var(--border);border-radius:var(--radius);font-size:15px;line-height:1.8;white-space:pre-wrap;word-break:break-word;}

/* ---------- 卡片 ---------- */
.card-title{font-size:22px;font-weight:700;letter-spacing:-.02em;margin:0 0 4px;}
.card-sub{font-size:13px;color:var(--text3);margin:0 0 22px;}
.card-wrap{display:flex;justify-content:center;}
.card-wrap img{width:100%;max-width:340px;border-radius:16px;box-shadow:0 10px 32px -10px rgba(0,0,0,.28);}

/* ---------- Splash ---------- */
.splash{
  position:fixed;inset:0;z-index:100;background:#ffffff;
  display:flex;flex-direction:column;padding:40px 24px;transition:opacity .35s ease;
}
.splash.hide{opacity:0;pointer-events:none;}
.splash-inner{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;}
.splash-mark{width:14px;height:14px;border-radius:50%;background:var(--accent);margin-bottom:30px;}
.splash-name{font-size:36px;font-weight:700;letter-spacing:-.03em;color:var(--text);margin:0 0 8px;}
.splash-en{font-size:13px;color:var(--text3);letter-spacing:.16em;margin-bottom:40px;}
.splash-tag{font-family:Georgia,"Songti SC","Noto Serif SC",serif;font-size:19px;color:var(--text2);line-height:1.8;margin:0;}
.splash-enter{
  width:auto;margin:0 auto;border:none;background:none;padding:12px 20px;
  font-size:15px;font-weight:500;color:var(--text2);letter-spacing:.02em;
}
.splash-enter:active{color:var(--text);}

/* ---------- 行程模式 ---------- */
.plan-entry{
  display:block;width:100%;margin-top:26px;padding:14px;border-radius:var(--radius);
  border:1px dashed var(--accent);background:var(--card);color:var(--accent);font-size:14px;font-weight:600;
}
.plan-entry:active{background:var(--accent-soft);}
.reminders{margin-top:18px;}
.rem-title{font-size:13px;font-weight:600;color:var(--text2);margin-bottom:8px;}
.rem-item{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  background:var(--card);border:1px solid var(--border);border-radius:12px;padding:10px 14px;margin-bottom:8px;
  font-size:14px;color:var(--text);
}
.rem-x{border:none;background:none;color:var(--text3);font-size:18px;line-height:1;flex-shrink:0;}
.rem-x:active{color:var(--text);}

#screen-plan,#screen-planview{display:flex;flex-direction:column;min-height:calc(100vh - 60px);min-height:calc(100dvh - 60px - env(safe-area-inset-bottom));}
#screen-plan .plan-input-wrap{flex:1;display:flex;flex-direction:column;justify-content:center;}
.plan-summary{
  font-family:Georgia,"Songti SC","Noto Serif SC",serif;font-size:19px;line-height:1.7;color:var(--text);
  background:var(--accent-soft);border:1px solid var(--border);border-radius:var(--radius);padding:16px 18px;margin-bottom:20px;
}
.plan-nodes{flex:1;display:flex;flex-direction:column;gap:10px;overflow-y:auto;-webkit-overflow-scrolling:touch;padding-bottom:4px;}
.plan-node{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:14px 16px;}
.plan-badge{display:inline-block;font-size:12px;font-weight:600;margin-bottom:6px;}
.plan-text{font-size:15px;font-weight:500;color:var(--text);}
.plan-note{font-size:14px;color:var(--text2);line-height:1.7;margin-top:6px;padding-left:10px;border-left:2px solid var(--border);}
.remind-btn{margin-top:10px;border:1px solid var(--border);background:#fff;color:var(--accent);border-radius:999px;padding:6px 14px;font-size:13px;font-weight:600;}
.remind-btn:active{background:var(--accent-soft);}
.remind-btn:disabled{color:var(--text3);}