:root{
  --bg:#f6f8f6;
  --card:#ffffff;
  --ink:#18211d;
  --ink-2:#3c4741;
  --muted:#7d8781;
  --line:#e7ece8;
  --green:#2f9e6e;
  --green-d:#1e7a52;
  --green-l:#eaf5ef;
  --amber:#c98a2b;
  --amber-l:#fdf4e5;
  --red:#c9553f;
  --red-l:#fbeceb;
  --shadow:0 2px 8px rgba(24,40,32,.05), 0 12px 28px rgba(24,40,32,.05);
  --r:18px;
}

*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
[hidden]{display:none !important}
html,body{margin:0;padding:0}
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  background:var(--bg);color:var(--ink);
  font-size:15px;line-height:1.55;
  -webkit-font-smoothing:antialiased;
}
.app{max-width:480px;margin:0 auto;min-height:100vh;background:var(--bg);position:relative;padding-bottom:32px}
img{max-width:100%;display:block}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}

/* ---------- 顶栏 ---------- */
.topbar{
  display:flex;align-items:center;justify-content:space-between;
  padding:14px 18px 10px;position:sticky;top:0;z-index:20;
  background:rgba(246,248,246,.86);backdrop-filter:blur(14px);
}
.brand{display:flex;align-items:center;gap:9px}
.logo{
  width:32px;height:32px;border-radius:10px;display:grid;place-items:center;
  background:linear-gradient(145deg,#39ac7a,#207c56);color:#fff;
  box-shadow:0 4px 10px rgba(47,158,110,.28);
}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text .name{font-size:16px;font-weight:700;letter-spacing:.5px}
.brand-text .sub{font-size:10px;color:var(--muted);letter-spacing:1.2px;text-transform:uppercase}
.top-actions{display:flex;gap:8px}
.icon-btn{
  width:36px;height:36px;border-radius:12px;display:grid;place-items:center;
  background:var(--card);color:var(--ink-2);border:1px solid var(--line);
  transition:transform .18s, background .18s;
}
.icon-btn:active{transform:scale(.92);background:#f1f4f1}

/* ---------- 首屏 ---------- */
.hero{padding:16px 20px 6px}
.hero h1{font-size:26px;line-height:1.32;margin:0 0 10px;font-weight:800;letter-spacing:-.3px}
.hero p{margin:0;color:var(--muted);font-size:13.5px;line-height:1.62}

.goal-row{padding:18px 20px 4px}
.goal-label{font-size:12px;color:var(--muted);margin-bottom:9px;letter-spacing:.4px}
.chips{display:flex;gap:8px;overflow-x:auto;padding-bottom:4px;scrollbar-width:none}
.chips::-webkit-scrollbar{display:none}
.chip{
  flex:0 0 auto;padding:7px 15px;border-radius:999px;font-size:13px;
  background:var(--card);color:var(--ink-2);border:1px solid var(--line);
  transition:all .2s;
}
.chip.active{background:var(--green);color:#fff;border-color:var(--green);box-shadow:0 4px 12px rgba(47,158,110,.25)}

/* ---------- 上传卡 ---------- */
.upload-card{
  margin:16px 20px 0;background:var(--card);border-radius:var(--r);
  box-shadow:var(--shadow);padding:26px 20px 20px;
  border:1px solid rgba(255,255,255,.6);
}
.upload-visual{text-align:center}
.upload-ring{
  width:76px;height:76px;margin:0 auto 14px;border-radius:50%;
  display:grid;place-items:center;color:var(--green);
  background:radial-gradient(circle at 50% 40%, #f2faf6, #e6f4ec);
  border:1px solid #d9eee2;
}
.upload-title{font-size:15.5px;font-weight:650;margin:0 0 5px}
.upload-hint{font-size:12px;color:var(--muted);margin:0}
.upload-actions{display:flex;gap:10px;margin-top:20px}
.btn{
  flex:1;height:47px;border-radius:13px;font-size:14.5px;font-weight:600;
  display:inline-flex;align-items:center;justify-content:center;gap:7px;
  transition:transform .16s, filter .16s;
}
.btn:active{transform:scale(.975);filter:brightness(.96)}
.btn.primary{background:linear-gradient(160deg,#34a574,#21855a);color:#fff;box-shadow:0 6px 16px rgba(47,158,110,.26)}
.btn.ghost{background:#f4f7f4;color:var(--ink-2);border:1px solid var(--line)}
.btn.small{height:36px;font-size:13px;padding:0 14px;flex:0 0 auto;border-radius:10px}
.btn.wide{width:100%;flex:none}

.tips{margin:18px 20px 0;display:flex;flex-direction:column;gap:8px}
.tip-item{font-size:12.2px;color:var(--muted);line-height:1.6}
.tip-item b{color:var(--ink-2);font-weight:600;margin-right:6px}

/* ---------- 加载 ---------- */
.loading{padding:24px 20px 0}
.scan-box{
  position:relative;border-radius:var(--r);overflow:hidden;background:#e9eeea;
  aspect-ratio:4/3;box-shadow:var(--shadow);
}
.scan-box img{width:100%;height:100%;object-fit:cover}
.scan-line{
  position:absolute;left:0;right:0;height:3px;
  background:linear-gradient(90deg,transparent,#43c78d,transparent);
  box-shadow:0 0 18px rgba(67,199,141,.7);
  animation:scan 1.9s ease-in-out infinite;
}
@keyframes scan{0%{top:-4%}50%{top:98%}100%{top:-4%}}
.loading-text{display:flex;align-items:center;justify-content:center;gap:10px;margin-top:22px;color:var(--ink-2);font-size:14px}
.dots{display:inline-flex;gap:5px}
.dots i{width:6px;height:6px;border-radius:50%;background:var(--green);opacity:.35;animation:blink 1.2s infinite}
.dots i:nth-child(2){animation-delay:.2s}
.dots i:nth-child(3){animation-delay:.4s}
@keyframes blink{0%,100%{opacity:.3;transform:translateY(0)}50%{opacity:1;transform:translateY(-3px)}}
.loading-hint{text-align:center;color:var(--muted);font-size:12px;margin:12px 0 0;letter-spacing:.2px}

/* ---------- 卡片通用 ---------- */
main#viewResult,main#viewHistory{padding:8px 16px 0}
.card{
  background:var(--card);border-radius:var(--r);padding:18px;margin:12px 0;
  box-shadow:var(--shadow);border:1px solid rgba(255,255,255,.6);
}
.card-title{margin:0 0 14px;font-size:14.5px;font-weight:700;letter-spacing:.2px;display:flex;align-items:center;gap:8px}
.count{font-size:11px;color:var(--muted);font-weight:500;background:#f3f6f3;padding:2px 8px;border-radius:999px}

/* ---------- 评分 ---------- */
.result-head{display:flex;flex-direction:column;gap:14px}
.score-wrap{display:flex;gap:16px;align-items:center}
.score-ring{
  width:92px;height:92px;flex:0 0 92px;border-radius:50%;position:relative;
  display:grid;place-items:center;background:conic-gradient(var(--green) 0deg, #eef2ee 0deg);
  transition:background 1s ease;
}
.score-inner{
  width:74px;height:74px;border-radius:50%;background:var(--card);
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  box-shadow:inset 0 0 0 1px rgba(0,0,0,.02);
}
.score-num{font-size:27px;font-weight:800;line-height:1;letter-spacing:-1px}
.score-unit{font-size:10px;color:var(--muted);margin-top:2px}
.result-meta{min-width:0;flex:1}
.result-meta h2{margin:0 0 3px;font-size:18px;font-weight:750;letter-spacing:-.2px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.muted{color:var(--muted);font-size:12.5px;margin:0}
.kcal-line{margin-top:8px;display:flex;align-items:baseline;gap:5px}
.kcal-line b{font-size:22px;font-weight:800;color:var(--green-d);letter-spacing:-.5px}
.kcal-line span{font-size:11.5px;color:var(--muted)}
.head-actions{display:flex;gap:8px;justify-content:flex-end}

/* ---------- 宏量 ---------- */
.macro{display:flex;flex-direction:column;gap:11px}
.macro-row{display:flex;align-items:center;gap:10px}
.m-name{width:44px;font-size:12.5px;color:var(--ink-2);flex:0 0 44px}
.bar{flex:1;height:7px;border-radius:999px;background:#f0f3f0;overflow:hidden}
.bar i{display:block;height:100%;width:0;border-radius:999px;transition:width .9s cubic-bezier(.2,.8,.2,1)}
.bar i[data-c="p"]{background:linear-gradient(90deg,#4bb98a,#2f9e6e)}
.bar i[data-c="f"]{background:linear-gradient(90deg,#e3b463,#c98a2b)}
.bar i[data-c="c"]{background:linear-gradient(90deg,#76a7d8,#4d84b8)}
.m-val{width:48px;text-align:right;font-size:12.5px;font-weight:650;color:var(--ink);flex:0 0 48px}
.ratio-strip{display:flex;height:8px;border-radius:999px;overflow:hidden;margin-top:16px;background:#f0f3f0}
.ratio-strip i{display:block;height:100%}
.ratio-legend{display:flex;gap:14px;margin-top:9px;flex-wrap:wrap}
.legend{display:flex;align-items:center;gap:5px;font-size:11.5px;color:var(--muted)}
.legend em{width:7px;height:7px;border-radius:2px;display:inline-block}

/* ---------- 食物列表 ---------- */
.food-list{display:flex;flex-direction:column}
.food{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:12px 0;border-bottom:1px solid var(--line);
}
.food:last-child{border-bottom:none;padding-bottom:0}
.food-left{min-width:0;flex:1}
.food-name{font-size:14px;font-weight:650;margin:0 0 3px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.food-portion{font-size:11.5px;color:var(--muted)}
.food-right{text-align:right;flex:0 0 auto}
.food-kcal{font-size:14px;font-weight:700;color:var(--ink)}
.food-kcal span{font-size:10px;color:var(--muted);font-weight:500}
.food-micro{font-size:11px;color:var(--muted);margin-top:2px}

/* ---------- 微量 ---------- */
.micro-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.micro-item{background:#f8faf8;border-radius:12px;padding:11px 12px;border:1px solid #eff3ef}
.micro-k{font-size:11px;color:var(--muted);margin-bottom:4px;letter-spacing:.3px}
.micro-v{font-size:12.5px;color:var(--ink-2);line-height:1.5;font-weight:500}

/* ---------- 亮点风险 ---------- */
.hl-wrap{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.col-t{font-size:12px;margin:0 0 8px;font-weight:700;letter-spacing:.5px}
.col-t.good{color:var(--green-d)}
.col-t.warn{color:var(--amber)}
.hl-col ul{margin:0;padding-left:0;list-style:none;display:flex;flex-direction:column;gap:7px}
.hl-col li{font-size:12.3px;line-height:1.5;color:var(--ink-2);position:relative;padding-left:12px}
.hl-col li:before{content:'';position:absolute;left:0;top:6px;width:5px;height:5px;border-radius:50%;background:var(--green)}
.hl-col.warn li:before{background:var(--amber)}

/* ---------- 建议 ---------- */
.tabs{display:flex;gap:6px;margin-bottom:14px;overflow-x:auto;scrollbar-width:none}
.tabs::-webkit-scrollbar{display:none}
.tab{
  flex:0 0 auto;padding:6px 13px;border-radius:9px;font-size:12.5px;
  background:#f4f7f4;color:var(--ink-2);border:1px solid transparent;transition:all .18s;
}
.tab.active{background:var(--green-l);color:var(--green-d);border-color:#cfe9db;font-weight:650}
.advice-text{font-size:13.5px;line-height:1.72;color:var(--ink-2);margin:0;min-height:52px}
.next-meal{margin-top:14px;padding-top:14px;border-top:1px dashed var(--line);display:flex;gap:10px}
.nm-tag{
  flex:0 0 auto;font-size:10.5px;background:var(--amber-l);color:var(--amber);
  padding:3px 8px;border-radius:6px;height:fit-content;font-weight:650;
}
.next-meal p{margin:0;font-size:12.5px;color:var(--ink-2);line-height:1.6}

/* ---------- 底栏 ---------- */
.bottom-bar{
  position:sticky;bottom:0;padding:12px 4px 16px;margin-top:8px;
  background:linear-gradient(180deg,rgba(246,248,246,0),var(--bg) 40%);
}

/* ---------- 历史 ---------- */
.page-head{display:flex;align-items:center;gap:10px;padding:10px 4px}
.page-head h2{margin:0;flex:1;font-size:20px;font-weight:750}
.stat-row{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-bottom:6px}
.stat{background:var(--card);border-radius:14px;padding:13px 12px;text-align:center;box-shadow:var(--shadow)}
.stat b{display:block;font-size:19px;font-weight:800;color:var(--green-d);letter-spacing:-.4px}
.stat span{font-size:11px;color:var(--muted)}
.history-list{margin-top:6px}
.h-item{
  background:var(--card);border-radius:14px;padding:14px;margin-bottom:10px;
  display:flex;align-items:center;gap:12px;box-shadow:var(--shadow);
  transition:transform .16s;
}
.h-item:active{transform:scale(.985)}
.h-date{
  flex:0 0 44px;text-align:center;border-right:1px solid var(--line);padding-right:10px;
}
.h-date b{display:block;font-size:15px;font-weight:750;line-height:1.2}
.h-date span{font-size:10px;color:var(--muted)}
.h-main{flex:1;min-width:0}
.h-title{font-size:14px;font-weight:650;margin:0 0 3px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.h-meta{font-size:11.5px;color:var(--muted)}
.h-score{
  flex:0 0 auto;width:44px;height:44px;border-radius:12px;display:grid;place-items:center;
  font-size:14px;font-weight:750;background:var(--green-l);color:var(--green-d);
}
.empty{text-align:center;padding:56px 20px;color:var(--muted)}
.empty svg{opacity:.4;margin-bottom:14px}
.empty p{font-size:13px;margin:0}

/* ---------- 更多面板 ---------- */
.sheet-mask{
  position:fixed;inset:0;background:rgba(18,26,22,.42);z-index:60;
  display:flex;align-items:flex-end;justify-content:center;
  animation:fade .22s ease;backdrop-filter:blur(2px);
}
@keyframes fade{from{opacity:0}to{opacity:1}}
.sheet{
  width:100%;max-width:480px;background:var(--card);border-radius:22px 22px 0 0;
  padding:12px 20px 26px;animation:up .28s cubic-bezier(.2,.9,.3,1);
}
@keyframes up{from{transform:translateY(100%)}to{transform:translateY(0)}}
.sheet-handle{width:38px;height:4px;border-radius:99px;background:#e2e8e2;margin:0 auto 16px}
.sheet h3{margin:0 0 14px;font-size:16px;font-weight:750}
.sheet-row{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:13px 0;border-top:1px solid var(--line)}
.row-title{font-size:13.5px;font-weight:600}
.row-sub{font-size:11.8px;color:var(--muted);margin-top:2px;line-height:1.55}
.switch{position:relative;flex:0 0 auto}
.switch input{display:none}
.switch span{
  display:block;width:44px;height:26px;border-radius:99px;background:#e3e9e4;
  position:relative;transition:background .2s;
}
.switch span:after{
  content:'';position:absolute;top:3px;left:3px;width:20px;height:20px;border-radius:50%;
  background:#fff;box-shadow:0 1px 3px rgba(0,0,0,.15);transition:transform .2s;
}
.switch input:checked + span{background:var(--green)}
.switch input:checked + span:after{transform:translateX(18px)}
.sheet .btn{margin-top:16px}

/* ---------- toast ---------- */
.toast{
  position:fixed;left:50%;bottom:96px;transform:translateX(-50%) translateY(10px);
  background:rgba(24,33,29,.92);color:#fff;font-size:13px;padding:10px 18px;
  border-radius:11px;z-index:80;opacity:0;transition:all .25s;max-width:80vw;text-align:center;
  pointer-events:none;
}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}