:root{--bg:#f7f5ef;--paper:#fffefa;--ink:#253b33;--muted:#778178;--green:#2b6552;--green-light:#e9f0e9;--orange:#c47450;--line:#e3e5db;--red:#be594b;--shadow:0 10px 34px #293b3210;font-family:ui-sans-serif,-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--bg);font-synthesis:none}*{box-sizing:border-box}body{margin:0}button,select{font:inherit}button,a,select{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:default;opacity:.5}a{color:var(--green)}button:focus-visible,a:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid #d7915c;outline-offset:4px}button{transition:background .16s,transform .16s}button:not(:disabled):active{transform:translateY(1px)}.header{background:#fffefa;border-bottom:1px solid var(--line)}.header-inner{max-width:1380px;margin:auto;min-height:94px;padding:18px 44px;display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{display:flex;align-items:center;gap:12px;text-decoration:none;font-size:21px;font-weight:750;white-space:nowrap}.brand-mark{background:var(--green);color:#fff;border-radius:14px;display:grid;place-items:center;width:46px;height:48px;font-size:35px}.brand small{display:block;font-size:8px;letter-spacing:2.1px;color:var(--muted);margin-top:5px}nav{display:flex;gap:8px}.nav{padding:12px 17px;border:0;background:transparent;border-radius:9px;color:#747d73;font-size:14px}.nav.active{background:var(--green-light);color:var(--green);font-weight:700}.header-note{font-size:12px;color:var(--muted);white-space:nowrap}.header-note i{display:inline-block;width:6px;height:6px;background:#91a887;border-radius:50%;margin-right:7px}main{max-width:1300px;margin:auto;padding:43px 36px 30px;min-height:calc(100vh - 190px)}.eyebrow{color:var(--orange);font-size:11px;letter-spacing:2.5px;font-weight:700;text-transform:uppercase}.intro{display:flex;justify-content:space-between;align-items:center;margin-bottom:28px;gap:20px}h1{font-size:clamp(26px,2.7vw,38px);font-weight:650;letter-spacing:1px;margin:11px 0 12px;line-height:1.4}h1 em{font-style:normal;color:var(--green);position:relative}h1 em:after{content:'';position:absolute;height:5px;background:#dce6d2;bottom:-5px;left:0;width:100%;border-radius:80%}.subtitle{color:var(--muted);font-size:14px;line-height:1.85;margin:0}.intro-aside{display:flex;gap:9px;align-items:center}.mini-card{background:white;border:1px solid var(--line);box-shadow:var(--shadow);height:77px;width:51px;border-radius:8px;display:grid;place-items:center;font:32px Georgia,serif;transform:rotate(-13deg)}.mini-card:last-child{transform:rotate(12deg);margin-left:-14px;margin-top:10px;color:var(--red)}.intro-aside span{font-size:12px;color:var(--muted);line-height:1.8;margin-left:15px}.toolbar{display:flex;justify-content:space-between;gap:16px;align-items:center;margin:25px 0 22px}.select-wrap{display:flex;align-items:center;gap:12px;font-size:13px;color:var(--muted)}select{border:1px solid var(--line);background:var(--paper);padding:11px 34px 11px 13px;border-radius:9px;color:var(--ink);max-width:230px}.button{display:inline-flex;justify-content:center;align-items:center;gap:9px;border:1px solid var(--line);border-radius:9px;padding:12px 19px;background:var(--paper);color:var(--ink);font-size:14px;font-weight:600;text-decoration:none}.button.primary{background:var(--green);border-color:var(--green);color:white}.button.primary:hover{background:#204f40}.button.secondary:hover{background:var(--green-light)}.button.text{border:0;background:transparent;color:var(--green);padding:10px;font-weight:500}.deal-id{font:11px 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8px;white-space:nowrap}.suit-row{display:flex;align-items:center;gap:6px;min-height:39px}.suit-symbol{width:25px;flex-shrink:0;font:25px Georgia,serif;color:#35443e}.red{color:var(--red)!important}.cards{display:flex;gap:5px;flex-wrap:wrap}.card{width:29px;height:33px;border:1px solid #e6e6dc;border-radius:5px;display:grid;place-items:center;background:#fff;font:600 17px Georgia,serif;box-shadow:0 2px 1px #00000004}.card.red{background:#fffaf7}.void{font-size:13px;color:#a6aca1}.hand-summary{border-top:1px dashed var(--line);margin-top:14px;padding-top:13px;display:flex;gap:16px;font-size:12px;color:var(--muted)}.hand-summary b{font-size:17px;color:var(--green);margin-right:3px}.hidden-hand{height:175px;display:flex;flex-direction:column;justify-content:center;align-items:center;gap:16px;color:var(--muted);font-size:12px}.backs{display:flex;margin-left:23px}.back{height:61px;width:43px;border-radius:6px;border:3px solid white;background:repeating-linear-gradient(45deg,#719b82 0 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.strategy-guide{border:1px solid var(--line);border-radius:14px;background:var(--paper);padding:28px;margin-top:25px;max-width:840px}.strategy-guide h2{font-size:22px;line-height:1.6;font-weight:600;margin:12px 0}.example-tabs{display:flex;gap:8px;flex-wrap:wrap;margin:22px 0 16px}.example-tabs .button{font-size:13px;padding:10px 13px}.example-condition{font-size:12px;color:#8c6b4f;line-height:1.8}.example-auction{display:flex;align-items:center;gap:18px;background:var(--green-light);padding:20px;border-radius:10px;margin:16px 0 22px}.example-auction>div{min-width:60px;text-align:center}.example-auction small{display:block;font-size:11px;color:var(--muted);margin-bottom:8px}.example-auction strong{display:block;font:600 30px Georgia,serif}.example-auction>span{color:#9eaf99;font-size:18px}.strategy-guide .privacy-note{margin-top:20px}.strategy-guide .meaning{padding-bottom:8px}@media(max-width:760px){.strategy-guide{padding:21px}.strategy-guide h2{font-size:19px}.example-tabs .button{font-size:11px;padding:10px}.example-auction{gap:12px;padding:17px 12px}.example-auction>div{min-width:48px}.example-auction strong{font-size:27px}}

.stage-track{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:9px}.stage-track>i{display:none}.stage-track .track-item{display:flex;flex-direction:column;gap:8px;white-space:normal;text-align:center;line-height:1.5}.example-auction{flex-wrap:wrap}.convention-label{padding:10px 14px;border-radius:7px;background:#f5e8d6;color:#875d3d;font-size:12px;line-height:1.8}.source-table-wrap{margin-top:24px;overflow-x:auto;border:1px solid var(--line);border-radius:12px;background:var(--paper)}.source-table{border-collapse:collapse;width:100%;min-width:540px;font-size:13px;line-height:1.8}.source-table caption{text-align:left;padding:17px 20px;font-size:13px;font-weight:600;color:var(--green)}.source-table th{background:var(--green-light);color:var(--green);text-align:left;font-weight:600}.source-table td,.source-table th{padding:12px 18px;border-top:1px solid var(--line)}.source-table td:first-child{white-space:nowrap}.source-table td:nth-child(2){font-weight:650}@media(max-width:760px){.stage-track{gap:4px;padding-left:12px;padding-right:12px}.stage-track .track-item{font-size:10px;gap:6px}.example-auction{gap:9px}.example-auction>div{min-width:42px}.example-auction small{font-size:10px}.example-auction strong{font-size:23px}.example-auction>span{font-size:14px}.source-table{font-size:12px}.source-table td,.source-table th{padding:10px 12px}}