:root{--bg:#f5f6f7;--surface:#ffffff;--ink:#17191c;--ink-soft:#4b5057;--ink-faint:#82878e;--line:#e3e5e8;--accent:#b3492c;--accent-soft:#f7ece8;--radius:12px;--shadow:0 1px 2px rgba(23,25,28,0.05),0 8px 24px rgba(23,25,28,0.06);--font:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Noto Sans SC","Microsoft YaHei","Segoe UI",sans-serif}*{margin:0;padding:0;box-sizing:border-box}body,html{height:100%}body{font-family:var(--font);background:var(--bg);color:var(--ink);-webkit-font-smoothing:antialiased}.app-shell,body{min-height:100dvh}.app-shell{display:flex;flex-direction:column}.topbar{height:64px;display:flex;align-items:center;justify-content:space-between;padding:0 28px;background:var(--surface);border-bottom:1px solid var(--line);flex-shrink:0}.brand{display:flex;align-items:baseline;gap:10px}.brand-mark{display:inline-flex;align-items:center;justify-content:center;width:28px;height:28px;border-radius:8px;background:var(--ink);color:#fff;font-weight:700;font-size:15px;align-self:center}.brand-name{font-weight:700;font-size:16px;letter-spacing:.01em;color:var(--ink);text-decoration:none}.brand-sub{color:var(--ink-faint);font-size:13px}.topbar-right{display:flex;align-items:center;gap:14px}.store-chip{font-size:13px;color:var(--ink-soft);background:var(--bg);border:1px solid var(--line);border-radius:999px;padding:6px 14px;text-decoration:none;transition:border-color .15s ease}.store-chip:hover{border-color:var(--ink-faint);color:var(--ink)}.step-counter{font-size:13px;color:var(--ink-soft);font-feature-settings:"tnum";font-variant-numeric:tabular-nums}.ghost-btn{text-decoration:none;display:inline-flex;align-items:center;font-family:inherit;font-size:13px;color:var(--ink-soft);background:transparent;border:1px solid var(--line);border-radius:var(--radius);padding:7px 14px;cursor:pointer;transition:border-color .15s ease,color .15s ease}.ghost-btn:hover{border-color:var(--ink-faint);color:var(--ink)}.ghost-btn.on{border-color:var(--accent);color:var(--accent);background:var(--accent-soft)}.ghost-btn:active{transform:translateY(1px)}.progress-track{height:3px;background:var(--line);flex-shrink:0}.progress-bar{height:100%;width:0;background:var(--accent);transition:width .3s ease}.stage{flex:1 1;overflow-y:auto;padding:40px 28px 24px}.step{max-width:1160px;margin:0 auto;animation:step-in .35s ease both}@keyframes step-in{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@media (prefers-reduced-motion:reduce){.step{animation:none}.progress-bar{transition:none}}.stage-tag{display:inline-block;font-size:13px;font-weight:600;color:var(--accent);background:var(--accent-soft);border-radius:999px;padding:5px 14px;margin-bottom:16px}.step h1{font-size:clamp(26px,3.4vw,40px);line-height:1.25;letter-spacing:-.01em;font-weight:700;max-width:24em}.step-question{margin-top:14px;font-size:17px;line-height:1.7;color:var(--ink-soft);max-width:40em}.step-grid{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,6fr);grid-gap:36px;gap:36px;margin-top:32px;align-items:start}.points{list-style:none;display:flex;flex-direction:column}.points li{padding:14px 0;border-bottom:1px solid var(--line);font-size:15.5px;line-height:1.75;color:var(--ink)}.points li:last-child{border-bottom:none}.points strong{color:var(--accent);font-weight:600}.keyline{margin-top:22px;padding:18px 22px;background:var(--surface);border-left:3px solid var(--accent);border-radius:0 var(--radius) var(--radius) 0;font-size:17px;font-weight:600;line-height:1.6;box-shadow:var(--shadow)}.links{margin-top:22px;display:flex;flex-wrap:wrap;gap:10px}.link-chip{display:inline-flex;align-items:center;gap:7px;font-size:13.5px;text-decoration:none;color:var(--ink);background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:9px 15px;transition:border-color .15s ease}a.link-chip:hover{border-color:var(--accent);color:var(--accent)}a.link-chip:after{content:"↗";font-size:12px;color:var(--ink-faint)}a.link-chip:hover:after{color:var(--accent)}span.link-chip{color:var(--ink-soft);border-style:dashed}.stats{display:grid;grid-template-columns:repeat(3,1fr);grid-gap:1px;gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;margin-top:22px}.stat{background:var(--surface);padding:16px 18px}.stat b{display:block;font-size:24px;font-weight:700;font-feature-settings:"tnum";font-variant-numeric:tabular-nums;letter-spacing:-.01em}.stat span,.stats-meta{font-size:12.5px;color:var(--ink-faint)}.stats-meta{margin-top:10px}.live-badge{display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:600;color:#1e7d46;background:#e8f5ee;border-radius:999px;padding:3px 10px;margin-left:8px;vertical-align:middle}.data-error{margin-top:22px;padding:16px 20px;border:1px solid #e5b8ab;background:#fdf1ee;border-radius:var(--radius);color:#8c3115;font-size:14px;line-height:1.7}.data-error code{display:block;margin-top:8px;font-size:12.5px;color:#a04a2e;word-break:break-all}.shot{position:-webkit-sticky;position:sticky;top:8px}.shot-frame{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}.shot-frame img{display:block;width:100%;height:auto}.shot-placeholder{aspect-ratio:16/10;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;border:1.5px dashed var(--line);border-radius:var(--radius);background:var(--surface);color:var(--ink-faint);text-align:center;padding:24px}.shot-placeholder code{font-size:12.5px;background:var(--bg);padding:3px 8px;border-radius:6px}.shot-placeholder p{font-size:13.5px;line-height:1.6;max-width:30em}.shot-caption{margin-top:10px;font-size:13px;color:var(--ink-faint);text-align:center}.cover{text-align:left;padding-top:4vh}.cover h1{font-size:clamp(32px,4.6vw,54px);max-width:18em}.cover .step-question{font-size:19px;margin-top:18px}.loop{display:flex;flex-wrap:wrap;align-items:stretch;gap:10px;margin-top:40px}.loop-node{flex:1 1 150px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:16px 14px;box-shadow:var(--shadow)}.loop-node.ours{border-top:3px solid var(--accent)}.loop-node.theirs{border-top:3px solid var(--ink)}.loop-node b{display:block;font-size:14.5px;margin-bottom:6px}.loop-node span{font-size:12.5px;color:var(--ink-faint);line-height:1.5;display:block}.loop-arrow{align-self:center;color:var(--ink-faint);font-size:18px;flex:0 0 auto}.loop-legend{margin-top:18px;display:flex;gap:24px;font-size:13px;color:var(--ink-soft)}.loop-legend i{display:inline-block;width:14px;height:3px;border-radius:2px;margin-right:7px;vertical-align:middle}.store-card{margin-top:36px;display:inline-flex;flex-wrap:wrap;gap:8px 28px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:16px 24px;font-size:14px;color:var(--ink-soft);box-shadow:var(--shadow)}.store-card b{color:var(--ink)}.pager{flex-shrink:0;display:flex;align-items:center;justify-content:space-between;gap:20px;padding:14px 28px;border-top:1px solid var(--line)}.pager,.pager-btn{background:var(--surface)}.pager-btn{font-family:inherit;font-size:14.5px;font-weight:600;padding:11px 26px;border-radius:var(--radius);border:1px solid var(--line);color:var(--ink);cursor:pointer;transition:border-color .15s ease,background .15s ease}.pager-btn:hover:not(:disabled){border-color:var(--ink-faint)}.pager-btn:disabled{opacity:.35;cursor:default}.pager-btn:active:not(:disabled){transform:translateY(1px)}.pager-btn-primary{background:var(--ink);border-color:var(--ink);color:#fff}.pager-btn-primary:hover:not(:disabled){background:#2a2d31;border-color:#2a2d31}.dots{display:flex;gap:8px}.dot{width:34px;height:5px;border-radius:999px;border:none;background:var(--line);cursor:pointer;padding:0;transition:background .15s ease}.dot:hover{background:var(--ink-faint)}.dot.on{background:var(--accent)}.presenter-panel{position:fixed;right:20px;bottom:76px;width:min(420px,calc(100vw - 40px));max-height:55vh;overflow-y:auto;background:var(--ink);color:#e8eaec;border-radius:var(--radius);box-shadow:0 16px 48px rgba(23,25,28,.35);z-index:50}.presenter-head{position:-webkit-sticky;position:sticky;top:0;display:flex;align-items:center;justify-content:space-between;gap:12px;padding:14px 18px 10px;background:var(--ink);font-size:14px}.presenter-hint{font-size:11.5px;color:#9aa0a6}.presenter-body{padding:4px 18px 18px}.presenter-body h4{font-size:12px;font-weight:600;color:#9aa0a6;margin:14px 0 6px}.presenter-body p{font-size:13.5px;line-height:1.8}.presenter-body ul{list-style:none}.presenter-body ul li{font-size:13px;line-height:1.7;padding:6px 0 6px 14px;position:relative}.presenter-body ul li:before{content:"";position:absolute;left:0;top:14px;width:6px;height:2px;background:var(--accent)}.card-wrap{flex:1 1;display:flex;align-items:center;justify-content:center;padding:24px;min-height:100dvh}.card{width:min(460px,100%);background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:40px 36px 36px}.card-brand{display:flex;align-items:center;gap:10px;margin-bottom:26px}.card h1{font-size:22px;font-weight:700;letter-spacing:-.01em}.card-sub{margin-top:10px;margin-bottom:26px;font-size:14px;line-height:1.7;color:var(--ink-soft)}.field{margin-bottom:16px}.field-label{display:block;font-size:13px;font-weight:600;color:var(--ink);margin-bottom:8px}.field-input{width:100%;font-family:inherit;font-size:15px;color:var(--ink);background:var(--bg);border:1px solid var(--line);border-radius:var(--radius);padding:12px 14px;outline:none;transition:border-color .15s ease,box-shadow .15s ease}.field-input:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}.form-error{margin-top:10px;font-size:13px;color:var(--accent)}.primary-btn{width:100%;margin-top:14px;font-family:inherit;font-size:15px;font-weight:600;color:#fff;background:var(--ink);border:1px solid var(--ink);border-radius:var(--radius);padding:12px 0;cursor:pointer;transition:background .15s ease}.primary-btn:hover:not(:disabled){background:#2a2d31}.primary-btn:active:not(:disabled){transform:translateY(1px)}.primary-btn:disabled{opacity:.6;cursor:default}.secondary-btn{width:100%;margin-top:12px;font-family:inherit;font-size:14.5px;font-weight:600;color:var(--ink);background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:11px 0;cursor:pointer;transition:border-color .15s ease}.secondary-btn:hover:not(:disabled){border-color:var(--ink-faint)}.card-divider{display:flex;align-items:center;gap:12px;margin:20px 0 6px;color:var(--ink-faint);font-size:12.5px}.card-divider:after,.card-divider:before{content:"";flex:1 1;height:1px;background:var(--line)}.card-footnote{margin-top:22px;font-size:12.5px;line-height:1.7;color:var(--ink-faint)}.store-list{list-style:none;display:flex;flex-direction:column;gap:10px}.store-item{display:block;text-decoration:none;background:var(--bg);border:1px solid var(--line);border-radius:var(--radius);padding:14px 18px;transition:border-color .15s ease,background .15s ease}.store-item:hover{border-color:var(--accent);background:var(--accent-soft)}.store-item b{display:block;font-size:15px;color:var(--ink);margin-bottom:4px}.store-item span{font-size:12.5px;color:var(--ink-faint)}@media (max-width:900px){.step-grid{grid-template-columns:1fr;gap:28px}.shot{position:static}.brand-sub{display:none}.stats{grid-template-columns:repeat(2,1fr)}.stage{padding:28px 18px 18px}.pager{padding:12px 18px}.dots,.loop-arrow{display:none}.loop-node{flex-basis:100%}.store-chip{display:none}}