* { margin:0; padding:0; box-sizing:border-box; -webkit-tap-highlight-color:transparent; }
  :root {
    --ink: #16213E;
    --ink-light: #2A3A5F;
    --gold: #C9A254;
    --amber: #B8860B;
    --red: #E5484D;
    --bg: #F6F5F2;
    --card: #FFFFFF;
    --line: #E5E2DB;
    --text: #2B2B2B;
    --text-2: #7A7A7A;
    --green: #2E7D5B;
  }
  html,body { height:100%; }
  body {
    font-family: -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
    background: var(--bg); color: var(--text);
    display:flex; justify-content:center;
  }
  #app { width:100%; max-width:480px; min-height:100vh; background:var(--bg); display:flex; flex-direction:column; position:relative; }
  #progress-wrap { padding:14px 20px 0; }
  #nav-back { font-size:15px; color:var(--ink); font-weight:600; cursor:pointer; margin-bottom:8px; display:none; width:fit-content; padding:8px 12px; background:var(--bg); border-radius:8px; }
  #nav-back:active { color:var(--amber); }
  #progress-track { height:4px; background:var(--line); border-radius:2px; overflow:hidden; }
  #progress-bar { height:100%; width:0%; background:var(--ink); border-radius:2px; transition:width .3s ease; }
  #progress-text { font-size:12px; color:var(--text-2); margin-top:6px; text-align:right; min-height:16px; }
  .order-entry.pulse { animation: entryPulse 1.2s ease 2; border-color: var(--amber) !important; }
  @keyframes entryPulse { 0%,100%{ box-shadow:0 0 0 0 rgba(232,180,83,0); } 50%{ box-shadow:0 0 0 6px rgba(232,180,83,.28); } }
  @keyframes syncRot { to { transform:rotate(360deg); } }
  .sync-spin { display:inline-flex; animation:syncRot 1s linear infinite; }
  /* 单选题选中倒计时提示条（大数字 + 简化文案） */
  .pick-hint { position:fixed; top:35%; left:50%; transform:translateX(-50%); background:rgba(26,26,26,.85); color:#fff; padding:18px 32px; border-radius:18px; text-align:center; z-index:60; opacity:0; transition:opacity .25s; pointer-events:none; white-space:nowrap; box-shadow:0 6px 20px rgba(0,0,0,.3); }
  .pick-hint.show { opacity:1; }
  .pick-hint .ph-num { font-size:36px; font-weight:700; line-height:1.1; }
  .pick-hint .ph-main { font-size:14px; margin-top:6px; }
  .pick-hint .ph-sub { font-size:11px; color:rgba(255,255,255,.55); margin-top:5px; }
  /* 反馈组件 */
  .fb-done { font-size:14px; color:var(--ink); padding:12px; background:var(--bg); border-radius:10px; }
  .fb-adj { margin-top:10px; }
  .fb-adj .adj-size { font-size:32px; font-weight:700; color:var(--ink); margin-bottom:10px; }
  .fb-adj button { width:100%; height:44px; background:var(--gold); color:#fff; border:none; border-radius:10px; font-size:15px; font-weight:600; cursor:pointer; }
  .screen { display:none; flex:1; flex-direction:column; padding:24px 24px 32px; animation:fade .25s ease; }
  .screen.active { display:flex; }
  @keyframes fade { from { opacity:0; transform:translateY(8px);} to { opacity:1; transform:none;} }
  .brand { font-size:15px; font-weight:600; letter-spacing:4px; color:var(--ink); }
  h1 { font-size:24px; font-weight:600; margin:18px 0 10px; line-height:1.35; }
  .sub { font-size:14px; color:var(--text-2); line-height:1.7; margin-bottom:28px; }
  .spacer { flex:1; }
  .btn { display:block; width:100%; padding:17px; border:none; border-radius:12px; font-size:17px; font-weight:600; cursor:pointer; text-align:center; background:var(--ink); color:#fff; margin-top:14px; }
  .btn:active { opacity:.85; }
  .btn-ghost { background:transparent; color:var(--text-2); font-weight:400; font-size:14px; padding:10px; }
  .btn-outline { background:#fff; color:var(--ink); border:1.5px solid var(--ink); }
  .opt { display:flex; align-items:center; gap:14px; background:var(--card); border:1.5px solid var(--line); border-radius:14px; padding:16px 18px; margin-bottom:12px; cursor:pointer; transition:border-color .15s; font-size:16px; }
  .opt:active { border-color:var(--ink); }
  .opt.sel { border-color:var(--ink); background:#F2F4FA; }
  .opt .icon { width:44px; height:44px; border-radius:10px; background:var(--ink); color:#fff; display:flex; align-items:center; justify-content:center; font-size:17px; flex-shrink:0; font-weight:600; overflow:hidden; }
  .opt .icon svg { display:block; }
  .opt small { display:block; color:var(--text-2); font-size:12.5px; margin-top:3px; }
  .opt .tick { margin-left:auto; color:var(--ink); font-weight:700; opacity:0; }
  .opt.sel .tick { opacity:1; }
  .num-input { display:flex; align-items:baseline; justify-content:center; gap:8px; background:var(--card); border:1.5px solid var(--line); border-radius:14px; padding:26px 20px; margin-bottom:6px; }
  .num-input input { border:none; outline:none; font-size:42px; font-weight:600; width:160px; text-align:center; color:var(--ink); background:transparent; }
  .num-input .unit { font-size:18px; color:var(--text-2); }
  .hint { font-size:13px; color:var(--text-2); line-height:1.7; margin-top:10px; }
  .est-btn { display:block; width:100%; margin-top:14px; padding:15px; background:#EFF3EA; border:1.5px dashed var(--green); border-radius:12px; color:var(--green); font-size:15px; font-weight:600; cursor:pointer; }
  .slider-val { text-align:center; font-size:40px; font-weight:600; color:var(--ink); margin:20px 0 4px; }
  .slider-val small { font-size:16px; color:var(--text-2); font-weight:400; }
  input[type=range] { width:100%; margin:26px 0 6px; accent-color:var(--ink); height:32px; }
  .range-marks { display:flex; justify-content:space-between; font-size:12px; color:var(--text-2); }
  .grid { display:grid; grid-template-columns:repeat(4,1fr); gap:10px; margin-bottom:8px; }
  .grid .cell { background:var(--card); border:1.5px solid var(--line); border-radius:10px; padding:14px 0; text-align:center; font-size:17px; font-weight:600; cursor:pointer; }
  .grid .cell.sel { border-color:var(--ink); background:var(--ink); color:#fff; }
  .code-card { background:var(--ink); color:#fff; border-radius:18px; padding:28px 24px; text-align:center; margin-bottom:18px; }
  .code-card .code { font-size:32px; font-weight:700; letter-spacing:1px; margin:6px 0; }
  .code-card .code-name { font-size:15px; opacity:.85; }
  .code-card .code-technical { font-size:11px; opacity:.4; margin-top:8px; }
  .code-card .tagline { font-size:12.5px; opacity:.6; margin-top:14px; }
  /* 推荐解释段 */
  .explain-card { background:var(--card); border:1.5px solid var(--line); border-radius:14px; padding:18px; margin-bottom:14px; }
  .explain-card h4 { font-size:14px; color:var(--text-2); margin:0 0 10px; font-weight:500; }
  .explain-card .step { font-size:14.5px; color:var(--ink); line-height:1.8; padding:4px 0; }
  .explain-card .step b { color:var(--green); }
  .explain-card .step .num { display:inline-flex; width:20px;height:20px;border-radius:50%;background:var(--green);color:#fff;font-size:11px;align-items:center;justify-content:center;margin-right:6px; }
  .rec-card { background:var(--card); border:1.5px solid var(--line); border-radius:14px; padding:22px; margin-bottom:12px; }
  .rec-row { display:flex; justify-content:space-between; align-items:center; padding:10px 0; }
  .rec-row + .rec-row { border-top:1px solid var(--line); }
  .rec-row .k { color:var(--text-2); font-size:14px; }
  .rec-row .v { font-size:17px; font-weight:600; color:var(--ink); }
  .rec-size { font-size:34px !important; color:var(--green) !important; }
  /* 按钮内的尺码继承按钮白字+字号（修正 .rec-size 绿色34px 冲突） */
  .btn .rec-size { color:#fff !important; font-size:inherit !important; }
  .fit-score { color:var(--gold) !important; }
  .promise { background:#EFF3EA; border-radius:12px; padding:14px 16px; font-size:13.5px; color:var(--green); line-height:1.7; margin-bottom:14px; }
  /* V5.3: 超大尺码 + 复制按钮 */
  .size-hero { text-align:center; padding:28px 20px 20px; background:var(--card); border:1.5px solid var(--line); border-radius:14px; margin-bottom:12px; }
  .size-hero .label { font-size:14px; color:var(--text-2); margin-bottom:8px; }
  .size-hero .size-big { font-size:64px; font-weight:800; color:var(--green); line-height:1.1; letter-spacing:1px; }
  .size-hero .size-sub { font-size:14px; color:var(--text-2); margin-top:8px; }
  .copy-size-btn { display:inline-flex; align-items:center; gap:4px; margin-top:12px; padding:8px 16px; border:1.5px solid var(--line); border-radius:10px; background:#fff; font-size:13.5px; color:var(--ink); cursor:pointer; }
  .copy-size-btn:active { background:var(--bg); }
  /* V5.3: 常用值快捷标签 */
  .quick-tags { display:flex; flex-wrap:wrap; gap:8px; justify-content:center; margin-top:14px; }
  .quick-tags .tag { padding:8px 14px; border:1.5px solid var(--line); border-radius:20px; background:#fff; font-size:15px; color:var(--ink); cursor:pointer; }
  .quick-tags .tag:active { background:var(--ink); color:#fff; }
  /* V5.3: 滑块刻度 */
  .slider-ticks { display:flex; justify-content:space-between; font-size:11px; color:var(--text-2); margin-top:4px; padding:0 2px; }
  /* V5.3: 确认页按钮层级 */
  .btn-primary-lg { width:100%; padding:18px; border:none; border-radius:14px; background:var(--green); color:#fff; font-size:18px; font-weight:700; cursor:pointer; margin-bottom:10px; }
  .btn-secondary-sm { width:100%; padding:14px; border:1.5px solid var(--line); border-radius:12px; background:#fff; color:var(--ink); font-size:15px; cursor:pointer; }
  /* 反馈组件 */
  .fb-card { background:var(--card); border:1.5px solid var(--line); border-radius:14px; padding:18px 20px; margin-bottom:12px; text-align:center; }
  .fb-q { font-size:15px; font-weight:600; margin-bottom:12px; }
  .fb-btns { display:flex; gap:10px; }
  .fb-btns button { flex:1; padding:13px 0; border-radius:11px; border:1.5px solid var(--line); background:#fff; font-size:15px; cursor:pointer; }
  .fb-btns button.ok { border-color:var(--green); color:var(--green); font-weight:600; }
  .fb-btns button:active { opacity:.8; }
  .fb-done { color:var(--green); font-size:14px; padding:8px 0; }
  .fb-adj { margin-top:12px; padding-top:12px; border-top:1px dashed var(--line); }
  .fb-adj .adj-size { font-size:24px; font-weight:700; color:var(--ink); margin:6px 0 10px; }
  .fb-adj button { padding:12px 28px; border-radius:11px; border:none; background:var(--ink); color:#fff; font-size:15px; font-weight:600; cursor:pointer; }
  .privacy { font-size:12px; color:var(--text-2); text-align:center; margin-top:18px; line-height:1.7; }
  .privacy a { color:var(--ink-light); text-decoration:underline; }
  .toast { position:fixed; left:50%; bottom:90px; transform:translateX(-50%); background:rgba(22,33,62,.92); color:#fff; padding:12px 22px; border-radius:24px; font-size:14px; opacity:0; transition:opacity .3s; pointer-events:none; z-index:99; white-space:nowrap; }
  .toast.show { opacity:1; }
  /* 隐私政策弹窗 */
  .modal-mask { position:fixed; inset:0; background:rgba(0,0,0,.45); z-index:50; display:none; }
  .modal-mask.show { display:block; }
  .modal { position:fixed; left:50%; top:50%; transform:translate(-50%,-50%); width:88%; max-width:440px; max-height:76vh; background:#fff; border-radius:16px; z-index:51; display:none; flex-direction:column; overflow:hidden; }
  .modal.show { display:flex; }
  .modal-head { padding:16px 20px; border-bottom:1px solid var(--line); font-size:16px; font-weight:600; display:flex; justify-content:space-between; align-items:center; }
  .modal-head .x { cursor:pointer; color:var(--text-2); font-size:20px; padding:4px 8px; }
  .modal-body { padding:18px 20px; overflow-y:auto; font-size:13px; line-height:1.9; color:var(--text); }
  .modal-body h3 { font-size:14px; margin:14px 0 6px; }
  .modal-body h3:first-child { margin-top:0; }
  /* 确认模式摘要卡 */
  .sum-card { background:var(--card); border:1.5px solid var(--line); border-radius:14px; padding:20px; margin-bottom:12px; }
  .sum-row { display:flex; justify-content:space-between; padding:8px 0; font-size:15px; }
  .sum-row + .sum-row { border-top:1px dashed var(--line); }
  .sum-row .k { color:var(--text-2); }
  .sum-row .v { font-weight:600; color:var(--ink); }