:root{
  --bg:#f5f6fa; --surface:#fff; --text:#1f2330; --text-soft:#6b7280;
  --grad-start:#5b6ef5; --grad-end:#8b5cf6; --accent:#ff8a4c;
  --border:#eceef3; --shadow:0 8px 30px rgba(31,35,48,.08); --radius:18px;
  --tabbar-h:64px; --safe-b:env(safe-area-inset-bottom,0px);
  --page-bg:#e7e9f2; --app-max-w:430px; --app-max-h:920px;
}
*{margin:0;padding:0;box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{height:100%}
body{font-family:-apple-system,BlinkMacSystemFont,'PingFang SC','SF Pro Text',sans-serif;
  background:var(--page-bg);color:var(--text);overflow:hidden;
  display:flex;align-items:center;justify-content:center}
/* 应用外壳:桌面居中限宽留白,窄屏铺满全屏 */
.phone{position:relative;width:100%;max-width:var(--app-max-w);height:100%;max-height:var(--app-max-h);
  background:var(--bg);overflow:hidden;display:flex;flex-direction:column}
@media(min-width:480px){
  .phone{height:92vh;border-radius:30px;box-shadow:0 24px 70px rgba(31,35,48,.28);border:1px solid var(--border)}
}
#app{flex:1;min-height:0;overflow-y:auto;-webkit-overflow-scrolling:touch;overscroll-behavior-y:contain}
.tabbar{flex-shrink:0;height:calc(var(--tabbar-h) + var(--safe-b));
  padding-bottom:var(--safe-b);display:flex;background:var(--surface);border-top:1px solid var(--border);z-index:40}
.tab{flex:1;background:none;border:none;display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:2px;cursor:pointer;color:var(--text-soft);font-size:11px}
.tab span{font-size:20px}
.tab.active{color:var(--grad-start)}
/* 品牌小标识:立体渐变圆点 + 悬停/点按提示 */
.brand-dot{flex:0 0 auto;align-self:center;position:relative;width:17px;height:17px;margin:0 10px;
  border-radius:50%;cursor:pointer;
  background:radial-gradient(circle at 33% 28%,#ffffff 0%,#c4b5fd 26%,#8b5cf6 55%,#5b6ef5 78%,#3f3aa8 100%);
  box-shadow:0 2px 5px rgba(91,110,245,.55),0 0 9px rgba(139,92,246,.5),
    inset 0 1px 1.5px rgba(255,255,255,.9),inset 0 -2px 3px rgba(52,42,120,.55);
  animation:brandPulse 2.6s ease-in-out infinite}
.brand-dot:active{transform:scale(.92)}
@keyframes brandPulse{0%,100%{box-shadow:0 2px 5px rgba(91,110,245,.55),0 0 6px rgba(139,92,246,.4),
    inset 0 1px 1.5px rgba(255,255,255,.9),inset 0 -2px 3px rgba(52,42,120,.55)}
  50%{box-shadow:0 2px 7px rgba(91,110,245,.7),0 0 14px rgba(139,92,246,.7),
    inset 0 1px 1.5px rgba(255,255,255,.95),inset 0 -2px 3px rgba(52,42,120,.55)}}
.brand-dot-tip{position:absolute;bottom:calc(100% + 9px);left:50%;
  transform:translateX(-50%) translateY(4px);background:rgba(31,35,48,.94);color:#fff;
  font-size:12px;line-height:1;padding:7px 11px;border-radius:9px;white-space:nowrap;
  opacity:0;pointer-events:none;transition:opacity .18s ease,transform .18s ease;
  box-shadow:var(--shadow);z-index:50}
.brand-dot-tip::after{content:'';position:absolute;top:100%;left:50%;transform:translateX(-50%);
  border:5px solid transparent;border-top-color:rgba(31,35,48,.94)}
.brand-dot:hover .brand-dot-tip,.brand-dot:focus .brand-dot-tip,.brand-dot.show .brand-dot-tip{
  opacity:1;transform:translateX(-50%) translateY(0)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-height:44px;padding:0 20px;border:none;
  border-radius:14px;background:linear-gradient(135deg,var(--grad-start),var(--grad-end));color:#fff;font-weight:600;
  font-size:15px;cursor:pointer}
.btn:active{transform:scale(.97)}
.btn-ghost{background:none;border:1px solid var(--border);color:var(--text)}
.btn-block{width:100%}
.btn[disabled]{opacity:.5;pointer-events:none}
.card{background:var(--surface);border-radius:var(--radius);box-shadow:var(--shadow);padding:18px}
.view-head{padding:22px 18px 8px}.view-head h2{font-size:23px;font-weight:700}
.empty{text-align:center;color:var(--text-soft);padding:48px 16px;font-size:38px}
.empty p{font-size:14px;margin-top:10px;line-height:1.6}
.modal-mask{position:absolute;inset:0;background:rgba(31,35,48,.45);display:flex;align-items:flex-end;justify-content:center;z-index:60}
.modal{background:var(--surface);border-radius:20px 20px 0 0;padding:22px;width:100%;max-width:560px;
  box-shadow:var(--shadow);padding-bottom:calc(22px + var(--safe-b))}
.modal h3{margin-bottom:14px;font-size:17px}
.modal input,.modal textarea{width:100%;padding:12px;border:1px solid var(--border);border-radius:12px;
  margin-bottom:12px;font-size:15px;font-family:inherit}
.modal textarea{min-height:80px;resize:vertical}
.modal-actions{display:flex;gap:10px}.modal-actions .btn{flex:1}
.btn-row{display:flex;gap:10px}.btn-row .btn{flex:1;min-width:0;padding:0 12px;white-space:nowrap}
.loading{display:flex;align-items:center;gap:10px;color:var(--text-soft);font-size:14px;padding:14px}
.spinner{width:18px;height:18px;border:2px solid var(--border);border-top-color:var(--grad-start);
  border-radius:50%;animation:spin .8s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.toast{position:absolute;bottom:calc(var(--tabbar-h) + 20px + var(--safe-b));left:50%;transform:translateX(-50%);
  background:rgba(31,35,48,.92);color:#fff;padding:10px 18px;border-radius:20px;font-size:14px;z-index:90;max-width:80%}
@media(min-width:640px){.modal-mask{align-items:center}.modal{border-radius:20px}}