/* ======================================================================
   鱼缸过滤流量计算 · 独立设计（深海循环：藏蓝 + 电光橙）
   浅色 = 清水白天；深色 = 深海夜蓝（由导航主题开关控制）
   ====================================================================== */
.flw{
  --ink:#12224a; --sub:#4a5f88; --faint:#8ea0c4;
  --bg:#eef2fb; --card:#ffffff; --card2:#eaf0fb; --line:#d6dff2; --line2:#e6ecf8;
  --pri:#1f5fd6; --pri-2:#4b87ef; --pri-soft:#e2ecfd; --pri-ink:#164aad;
  --acc:#f5731b; --acc-soft:#fdeada; --acc-ink:#c25510;
  --ok:#0f7a4d; --ok-soft:#dcf3e8; --warn:#9a6a06; --warn-soft:#fdf1d8; --red:#c22a32; --red-soft:#fbe7e8;
  --r:18px;
  --shadow:0 1px 2px rgba(18,34,74,.06),0 14px 34px rgba(31,95,214,.12);
  color:var(--ink);
  font-family:"HarmonyOS Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  font-size:15px; line-height:1.78;
  background:
    radial-gradient(880px 380px at 10% -160px, rgba(31,95,214,.12), transparent 62%),
    radial-gradient(720px 320px at 92% -120px, rgba(245,115,27,.08), transparent 60%),
    var(--bg);
  padding:0 16px 56px;
}
:root[data-theme="dark"] .flw{
  --ink:#e8eefb; --sub:#a3b4d6; --faint:#5f7099;
  --bg:#080f22; --card:#111a34; --card2:#182649; --line:#26365f; --line2:#1e2c50;
  --pri:#5b93f5; --pri-2:#82b0ff; --pri-soft:rgba(91,147,245,.15); --pri-ink:#b9d2ff;
  --acc:#ff9647; --acc-soft:rgba(255,150,71,.15); --acc-ink:#ffb380;
  --ok:#4ade80; --ok-soft:rgba(74,222,128,.13); --warn:#fbbf24; --warn-soft:rgba(251,191,36,.13); --red:#f87171; --red-soft:rgba(248,113,113,.14);
  --shadow:0 1px 2px rgba(0,0,0,.5),0 14px 34px rgba(0,0,0,.5);
}
.flw *{box-sizing:border-box;}
.flw b{font-weight:700;}
.flw-wrap{max-width:1120px;margin:0 auto;}
.flw code,.flw output{font-family:"JetBrains Mono",ui-monospace,SFMono-Regular,Consolas,monospace;}

/* ---------- Hero：水泵循环示意 ---------- */
.flw-hero{margin-top:10px;border:1px solid var(--line);border-radius:22px;background:var(--card);box-shadow:var(--shadow);padding:26px 30px;display:flex;gap:30px;align-items:center;flex-wrap:wrap;}
.flw-cycle{flex:none;width:184px;height:136px;position:relative;}
.flw-tank{position:absolute;left:10px;top:12px;width:120px;height:84px;border:2px solid var(--pri);border-radius:8px;background:var(--card2);overflow:hidden;}
.flw-tank-water{position:absolute;left:0;right:0;bottom:0;height:62%;background:linear-gradient(180deg,var(--pri-2),var(--pri));opacity:.5;}
.flw-pump{position:absolute;right:10px;bottom:14px;width:44px;height:34px;border:2px solid var(--acc);border-radius:8px;background:var(--acc-soft);}
.flw-pump::after{content:"";position:absolute;left:50%;top:50%;width:16px;height:16px;border-radius:50%;transform:translate(-50%,-50%);border:2px solid var(--acc);border-top-color:transparent;animation:flwspin 2.4s linear infinite;}
@keyframes flwspin{to{transform:translate(-50%,-50%) rotate(360deg);}}
.flw-arrow{position:absolute;height:2px;background:var(--acc);}
.flw-arrow-a{left:120px;top:44px;width:46px;}
.flw-arrow-a::after{content:"";position:absolute;right:-1px;top:-4px;border:5px solid transparent;border-left-color:var(--acc);}
.flw-arrow-b{left:120px;top:96px;width:46px;}
.flw-arrow-b::before{content:"";position:absolute;left:-1px;top:-4px;border:5px solid transparent;border-right-color:var(--acc);}
.flw-cycle-num{position:absolute;left:70px;top:44px;transform:translateX(-50%);z-index:3;font-size:13px;font-weight:900;color:#fff;background:var(--pri);border-radius:999px;padding:2px 12px;white-space:nowrap;box-shadow:var(--shadow);}
.flw-hero-txt{flex:1;min-width:280px;}
.flw-hero h1{margin:0 0 6px;font-size:clamp(23px,3.3vw,31px);font-weight:900;letter-spacing:-.01em;}
.flw-hero h1 span{background:linear-gradient(92deg,var(--pri),var(--acc));-webkit-background-clip:text;background-clip:text;color:transparent;}
.flw-hero p{margin:0;color:var(--sub);font-size:14.5px;max-width:740px;}
.flw-hero p em{font-style:normal;color:var(--pri-ink);font-weight:700;}
.flw-quick{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px;}
.flw-qchip{border:1px dashed var(--pri-2);background:var(--pri-soft);color:var(--pri-ink);border-radius:999px;padding:5px 14px;font-size:12.5px;font-weight:700;cursor:pointer;transition:all .15s;}
.flw-qchip:hover{background:var(--pri);color:#fff;border-style:solid;}
:root[data-theme="dark"] .flw-qchip:hover{color:#111a34;}

/* ---------- 卡片与通用控件 ---------- */
.flw-card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--shadow);padding:18px 20px;margin-top:18px;}
.flw-card h2{margin:0 0 4px;font-size:16.5px;font-weight:800;display:flex;align-items:center;gap:8px;}
.flw-card h2 .flw-num{display:inline-flex;align-items:center;justify-content:center;width:23px;height:23px;border-radius:8px;background:linear-gradient(135deg,var(--pri),var(--acc));color:#fff;font-size:12px;font-weight:900;flex:none;}
:root[data-theme="dark"] .flw-card h2 .flw-num{color:#111a34;}
.flw-sub{margin:16px 0 6px;font-size:14px;font-weight:800;color:var(--pri-ink);}
.flw-tip{font-size:12.8px;color:var(--sub);margin:0 0 12px;}
.flw-tip em{font-style:normal;color:var(--pri-ink);font-weight:700;}
.flw-row{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin:10px 0;}
.flw-btn{border:none;border-radius:12px;padding:9px 18px;font-size:14px;font-weight:800;cursor:pointer;transition:all .15s;}
.flw-btn-go{background:linear-gradient(135deg,var(--pri),var(--acc));color:#fff;box-shadow:0 6px 16px rgba(31,95,214,.3);}
.flw-btn-go:hover{filter:brightness(1.07);}
.flw-btn-ghost{background:var(--card2);color:var(--pri-ink);border:1px solid var(--line);}
.flw-btn-ghost:hover{border-color:var(--pri-2);}
.flw-msg{margin-top:10px;font-size:13px;min-height:20px;font-weight:600;}
.flw-msg.err{color:var(--red);}
.flw-msg.ok{color:var(--ok);}

/* ---------- 表单 ---------- */
.flw-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:6px;}
@media (max-width:820px){.flw-grid{grid-template-columns:1fr 1fr;}}
@media (max-width:520px){.flw-grid{grid-template-columns:1fr;}}
.flw-field label{display:block;font-size:12.5px;font-weight:700;color:var(--sub);margin-bottom:5px;}
.flw-field input,.flw-field select,.flw-area{width:100%;border:1px solid var(--line);border-radius:11px;background:var(--card2);color:var(--ink);padding:9px 12px;font-size:14px;font-weight:600;font-family:inherit;transition:border-color .15s;}
.flw-field input:focus,.flw-field select:focus,.flw-area:focus{outline:none;border-color:var(--pri-2);box-shadow:0 0 0 3px var(--pri-soft);}
.flw-field-btn{display:flex;align-items:flex-end;}
.flw-field-btn .flw-btn{width:100%;}
.flw-area{margin-top:4px;resize:vertical;font-family:"JetBrains Mono",ui-monospace,Consolas,monospace;font-size:13px;line-height:1.7;}

/* ---------- 水体输出 ---------- */
.flw-out{display:flex;gap:14px;flex-wrap:wrap;margin-top:14px;}
.flw-out-item{flex:1;min-width:160px;background:linear-gradient(150deg,var(--pri-soft),var(--card2));border:1px solid var(--line);border-radius:14px;padding:12px 16px;}
.flw-out-item span{display:block;font-size:12px;color:var(--sub);font-weight:700;}
.flw-out-item b{display:block;font-size:clamp(18px,2.6vw,24px);font-weight:900;color:var(--pri-ink);font-family:"JetBrains Mono",ui-monospace,Consolas,monospace;margin-top:2px;}

/* ---------- 倍数区间条 ---------- */
.flw-band{margin-top:16px;}
.flw-band-label{display:flex;justify-content:space-between;font-size:12.5px;font-weight:800;color:var(--sub);margin-bottom:5px;}
.flw-band-title{color:var(--pri-ink);}
.flw-band-track{position:relative;height:14px;border-radius:999px;background:var(--card2);border:1px solid var(--line);overflow:hidden;}
.flw-band-fill{position:absolute;top:0;bottom:0;background:var(--pri-soft);}
.flw-band-fill::before{content:"";position:absolute;inset:0;background:repeating-linear-gradient(90deg,var(--pri-2) 0 6px,transparent 6px 12px);opacity:.35;}
.flw-band-mark{position:absolute;top:-4px;bottom:-4px;width:4px;border-radius:2px;background:var(--acc);box-shadow:0 0 0 2px var(--card);transition:left .3s ease;}

/* ---------- 表格 ---------- */
.flw-scroll{overflow-x:auto;border:1px solid var(--line2);border-radius:14px;}
.flw-table{width:100%;border-collapse:collapse;font-size:13.5px;min-width:620px;}
.flw-table th{background:var(--card2);color:var(--sub);font-weight:800;text-align:left;padding:9px 12px;white-space:nowrap;border-bottom:1px solid var(--line);}
.flw-table td{padding:9px 12px;border-bottom:1px solid var(--line2);white-space:nowrap;}
.flw-table tbody tr:last-child td{border-bottom:none;}
.flw-table tbody tr:hover td{background:var(--pri-soft);}
.flw-table code{color:var(--pri-ink);font-weight:700;}
.flw-tag{display:inline-block;border-radius:7px;padding:1px 9px;font-size:12px;font-weight:800;}
.flw-tag.ok{background:var(--ok-soft);color:var(--ok);}
.flw-tag.warn{background:var(--warn-soft);color:var(--warn);}
.flw-tag.bad{background:var(--red-soft);color:var(--red);}

/* ---------- 流量结果 ---------- */
.flw-result{margin-top:14px;border:1px solid var(--line);border-radius:16px;background:linear-gradient(150deg,var(--pri-soft),var(--card2));padding:16px 18px;}
.flw-res-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;}
@media (max-width:820px){.flw-res-grid{grid-template-columns:repeat(2,1fr);}}
.flw-res-cell{background:var(--card);border:1px solid var(--line2);border-radius:12px;padding:10px 14px;}
.flw-res-cell h4{margin:0 0 4px;font-size:12.5px;color:var(--sub);font-weight:800;}
.flw-res-cell p{margin:0;font-size:16px;font-weight:900;color:var(--pri-ink);font-family:"JetBrains Mono",ui-monospace,Consolas,monospace;}
.flw-res-cell small{display:block;font-size:11.5px;color:var(--sub);font-weight:500;margin-top:3px;}
.flw-verdict{margin-top:12px;font-size:13.5px;font-weight:700;border-left:3px solid var(--pri-2);padding:2px 0 2px 12px;color:var(--sub);}
.flw-verdict.ok{border-left-color:var(--ok);color:var(--ok);}
.flw-verdict.warn{border-left-color:var(--warn);color:var(--warn);}
.flw-verdict.bad{border-left-color:var(--red);color:var(--red);}

/* ---------- 换水输出 ---------- */
.flw-changeout{margin-top:12px;border:1px dashed var(--pri-2);border-radius:14px;background:var(--card2);padding:14px 16px;font-size:14px;font-weight:700;color:var(--pri-ink);}
.flw-changeout small{display:block;font-weight:500;color:var(--sub);font-size:12.5px;margin-top:4px;}

/* ---------- 批量统计 ---------- */
.flw-stat{margin-top:10px;font-size:13px;color:var(--sub);font-weight:600;min-height:20px;}
.flw-stat b.err{color:var(--red);}

/* ---------- 摘要 ---------- */
.flw-sum{margin:6px 0 4px;border:1px dashed var(--line);border-radius:12px;background:var(--card2);color:var(--ink);padding:12px 15px;font-size:13px;line-height:1.8;white-space:pre-wrap;word-break:break-all;font-family:"JetBrains Mono",ui-monospace,Consolas,monospace;max-height:260px;overflow:auto;}

@media (max-width:860px){
  .flw-hero{padding:20px 18px;gap:18px;}
  .flw-card{padding:15px 14px;}
}