/* =========================================================
   exchange.css — section Amoy Exchange (dark, glow)
   ========================================================= */
.exchange{--mint:#9dffbc;--buy:#2ebd85;--sell:#f6465d;--amber:#f0b90b;
  background:#06090a;color:#eef3ee;position:relative;overflow:hidden}
.exchange::before{content:"";position:absolute;right:-12%;top:-8%;width:60vw;aspect-ratio:1;pointer-events:none;
  background:radial-gradient(circle,rgba(32,54,235,.38),transparent 60%);filter:blur(30px);animation:drift 14s ease-in-out infinite alternate}
.exchange::after{content:"";position:absolute;left:-16%;bottom:6%;width:52vw;aspect-ratio:1;pointer-events:none;
  background:radial-gradient(circle,rgba(46,189,133,.2),transparent 62%);filter:blur(30px)}
.exchange>*{position:relative;z-index:1}
.exchange h2 em,.exchange .eyebrow{color:var(--mint)}
.exchange-heading>p{color:#c9d3cb}
.exchange .footnote{opacity:.6}
.mint-button{background:var(--mint);color:#04110b;border-color:var(--mint);box-shadow:0 0 36px rgba(157,255,188,.35)}

/* tape */
.ex-tape{margin:0 -5vw 56px;overflow:hidden;border-block:1px solid #ffffff22;padding:14px 0;white-space:nowrap}
.ex-tape-track{display:inline-flex;animation:tape 40s linear infinite}
.ex-tape span{font-size:12px;font-weight:700;letter-spacing:.16em;color:#cfd8d0}
.ex-tape b{color:var(--mint);margin:0 22px}

/* stats */
.ex-stats{display:grid;grid-template-columns:repeat(4,1fr);margin:0 0 56px;border:1px solid #ffffff1f;border-radius:20px;overflow:hidden;
  background:linear-gradient(180deg,#ffffff0a,#ffffff03)}
.ex-stats>div{padding:28px 26px;border-right:1px solid #ffffff1f;min-width:0}
.ex-stats>div:last-child{border-right:0}
.ex-stats strong{display:block;font-size:clamp(48px,6vw,92px);letter-spacing:-.07em;line-height:1;color:var(--mint);text-shadow:0 0 40px rgba(157,255,188,.35)}
.ex-stats span{display:block;margin-top:14px;font-size:10px;font-weight:700;letter-spacing:.14em}
.ex-stats small{display:block;margin-top:6px;font-size:13px;line-height:1.5;color:#a9b5ab}

/* screenshot + hotspots */
.exchange .exchange-image{background:linear-gradient(145deg,#0f1a17,#0a0f12);border:1px solid #ffffff1f;border-radius:22px;
  padding:clamp(10px,2vw,26px);overflow:hidden;box-shadow:0 40px 120px -30px rgba(32,54,235,.55)}
.shot-frame{position:relative}
.shot-frame img{width:100%;height:auto;display:block;border-radius:10px}
.shot-caption{display:flex;justify-content:space-between;gap:12px;padding:16px 4px 4px;font-size:10px;font-weight:700;letter-spacing:.12em;color:#b6c2b8}
.hs{position:absolute;left:var(--x);top:var(--y);width:28px;height:28px;margin:-14px 0 0 -14px;padding:0;border:0;background:none;cursor:pointer;z-index:2}
.hs::before{content:"";position:absolute;inset:0;border-radius:50%;border:2px solid var(--mint);animation:hsPing 2.4s ease-out infinite}
.hs i{position:absolute;inset:0;border-radius:50%;display:grid;place-items:center;font:700 12px/1 'DM Sans',Arial,sans-serif;font-style:normal;
  color:#04110b;background:var(--mint);transition:transform .25s,background .25s}
.hs:focus-visible i{outline:2px solid #fff;outline-offset:2px}
.hs.on{z-index:5}
.hs.on i{background:#fff;transform:scale(1.18)}
.hs-tip{position:absolute;top:50%;left:calc(100% + 12px);width:max-content;max-width:min(240px,34vw);padding:10px 12px;border-radius:10px;
  background:rgba(5,10,9,.94);border:1px solid rgba(157,255,188,.4);font-size:11px;line-height:1.45;color:#d9e3da;text-align:left;
  opacity:0;pointer-events:none;transform:translateY(-50%) translateX(-6px);transition:opacity .25s,transform .25s}
.hs-tip b{display:block;margin-bottom:3px;font-size:10px;letter-spacing:.14em;color:var(--mint)}
.hs[data-side=l] .hs-tip{left:auto;right:calc(100% + 12px);transform:translateY(-50%) translateX(6px)}
.hs.on .hs-tip{opacity:1;transform:translateY(-50%)}

.hs-legend{list-style:none;margin:28px 0 0;padding:0;display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.hs-legend li{display:flex;gap:12px;align-items:flex-start;padding:14px;border:1px solid #ffffff17;border-radius:14px;min-width:0;transition:border-color .3s,background .3s}
.hs-legend li>i{flex:none;width:24px;height:24px;border-radius:50%;display:grid;place-items:center;font:700 11px 'DM Sans',Arial,sans-serif;font-style:normal;
  background:#ffffff1a;color:#fff;transition:background .3s,color .3s}
.hs-legend li.on{border-color:rgba(157,255,188,.55);background:rgba(157,255,188,.07)}
.hs-legend li.on>i{background:var(--mint);color:#04110b}
.hs-legend b{display:block;font-size:11px;letter-spacing:.1em;margin-bottom:4px}
.hs-legend p{margin:0;font-size:12.5px;line-height:1.5;color:#a9b5ab}

/* sub-headings */
.ex-sub{display:flex;justify-content:space-between;gap:20px;margin:110px 0 22px;padding-top:16px;border-top:1px solid #ffffff2b;font-size:10px;font-weight:700;letter-spacing:.12em;color:#b6c2b8}
.ex-title{font-size:clamp(40px,6vw,88px);letter-spacing:-.06em;line-height:1;margin:0 0 30px;font-weight:800}
.ex-title em{font-size:.8em;color:var(--mint)}

/* filter + cards */
.ex-filter{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 26px}
.ex-filter button{font:700 10px 'DM Sans',Arial,sans-serif;letter-spacing:.12em;color:#dfe8e0;background:transparent;border:1px solid #ffffff33;
  border-radius:30px;padding:10px 15px;cursor:pointer;transition:border-color .25s,background .25s,box-shadow .25s}
.ex-filter button:hover{border-color:var(--mint)}
.ex-filter button.on{background:var(--mint);color:#04110b;border-color:var(--mint);box-shadow:0 0 24px rgba(157,255,188,.35)}
.ex-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.ex-card{position:relative;min-width:0;padding:26px 24px 24px;border:1px solid #ffffff1c;border-radius:20px;overflow:hidden;
  background:linear-gradient(180deg,#ffffff0b,#ffffff03);transition:border-color .3s}
.ex-card.rev,html:not(.js-motion) .ex-card{transition:opacity .4s,transform .4s,border-color .3s}
.ex-card::before{content:"";position:absolute;inset:0;pointer-events:none;opacity:0;transition:opacity .3s;
  background:radial-gradient(260px circle at var(--mx,50%) var(--my,0%),rgba(157,255,188,.16),transparent 70%)}
.ex-card:hover{border-color:rgba(157,255,188,.45)}
.ex-card:hover::before{opacity:1}
.ex-card.dim{opacity:.2;transform:scale(.985)}
.ex-card header{display:flex;justify-content:space-between;gap:12px;font-size:10px;font-weight:700;letter-spacing:.13em;color:var(--mint)}
.ex-card h3{font-size:clamp(20px,1.9vw,26px);letter-spacing:-.03em;line-height:1.12;margin:22px 0 8px}
.ex-card p{margin:0 0 18px;font-size:13.5px;line-height:1.6;color:#aeb9b0}
.chips{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:7px}
.chips li{padding:7px 11px;border-radius:30px;border:1px solid #ffffff2a;font-size:11px;font-weight:600;color:#e3ebe4}
.chips li.hot{background:rgba(157,255,188,.14);border-color:rgba(157,255,188,.55);color:var(--mint)}

/* flow */
.ex-flow{display:grid;grid-template-columns:1fr 44px 1fr 44px 1fr 44px 1fr;align-items:stretch}
.flow-col{display:flex;flex-direction:column;gap:10px;min-width:0}
.flow-h{font-size:10px;font-weight:700;letter-spacing:.14em;color:#8fa093;margin-bottom:4px}
.node{padding:16px;border:1px solid #ffffff26;border-radius:14px;background:#ffffff08;font-size:12px;font-weight:700;letter-spacing:.08em;overflow-wrap:anywhere}
.node small{display:block;margin-top:5px;font-size:12px;font-weight:400;letter-spacing:0;color:#a2afa4}
.node.accent{border-color:rgba(157,255,188,.5);background:rgba(157,255,188,.09)}
.flow-arrow{position:relative;align-self:center;height:2px;background:repeating-linear-gradient(90deg,#ffffff55 0 6px,transparent 6px 12px)}
.flow-arrow::after{content:"";position:absolute;top:-3px;left:0;width:8px;height:8px;border-radius:50%;background:var(--mint);box-shadow:0 0 12px var(--mint);animation:flowDot 2s linear infinite}
.ex-note{margin:24px 0 0;font-size:10px;font-weight:700;letter-spacing:.11em;color:#8fa093;line-height:1.7}

/* demo */
.ex-demo{display:grid;grid-template-columns:1.5fr 1fr;gap:20px;align-items:stretch}
.demo-chart,.demo-flex{min-width:0;border:1px solid #ffffff1f;border-radius:22px;padding:22px;background:#0a0f0e}
.demo-top{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:12px;font-size:10px;font-weight:700;letter-spacing:.13em}
.seg{display:inline-flex;border:1px solid #ffffff33;border-radius:30px;padding:3px}
.seg button{font:700 10px 'DM Sans',Arial,sans-serif;letter-spacing:.1em;color:#dfe8e0;background:transparent;border:0;border-radius:30px;padding:8px 14px;cursor:pointer;transition:background .25s,color .25s}
.seg button.on{background:var(--mint);color:#04110b}
.dchart{width:100%;height:auto;display:block}
.dchart .up{fill:var(--buy);stroke:var(--buy)}
.dchart .dn{fill:var(--sell);stroke:var(--sell)}
.dchart text{font-family:'DM Sans',Arial,sans-serif;font-weight:700}
.dlegend{display:flex;flex-wrap:wrap;gap:8px 18px;list-style:none;padding:0;margin:12px 0 0;font-size:11px;font-weight:600}
.dlegend li::before{content:"";display:inline-block;width:18px;border-top:2px dashed currentColor;margin-right:7px;vertical-align:middle}
.dlegend .s{color:#ff7a8c}.dlegend .b{color:#4fe3a4}.dlegend .a{color:var(--amber)}.dlegend .o{color:#59d8d0}
.demo-chart .mock-note,.demo-flex .mock-note{display:block;margin-top:10px;font-size:10px;font-weight:700;letter-spacing:.1em;opacity:.5}
.demo-flex{display:flex;flex-direction:column;justify-content:space-between;gap:14px}
.flex-card{position:relative;flex:1;min-height:320px;padding:24px;border-radius:20px;overflow:hidden;border:1px solid #ffffff30;
  display:flex;flex-direction:column;justify-content:space-between;gap:16px;outline:none;
  background:radial-gradient(120% 90% at 100% 0%,rgba(32,54,235,.7),transparent 55%),radial-gradient(90% 80% at 0% 100%,rgba(46,189,133,.5),transparent 55%),#0b1210;
  transform:perspective(900px) rotateX(var(--rx,0deg)) rotateY(var(--ry,0deg));transition:transform .2s ease-out}
.flex-card::after{content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(115deg,transparent 35%,rgba(255,255,255,.18) 50%,transparent 65%);transform:translateX(-120%);animation:sheen 4.5s ease-in-out infinite}
.fc-top{display:flex;justify-content:space-between;align-items:center;font-size:11px;font-weight:700;letter-spacing:.14em}
.fc-top em{font:700 9px 'DM Sans',Arial,sans-serif;font-style:normal;letter-spacing:.14em;border:1px solid #ffffff99;border-radius:30px;padding:5px 10px}
.fc-pair{font-size:14px;font-weight:700;display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.fc-pair span{padding:3px 8px;border-radius:6px;background:rgba(46,189,133,.22);color:#4fe3a4;font-size:11px}
.fc-roe{margin-top:8px;font-size:clamp(60px,6.4vw,100px);letter-spacing:-.07em;line-height:1;color:var(--mint);text-shadow:0 0 40px rgba(157,255,188,.45)}
.fc-roe small{display:block;margin-bottom:8px;font-size:10px;letter-spacing:.16em;color:#d4f5df}
.fc-rows{display:grid;grid-template-columns:1fr 1fr;gap:12px 18px;font-size:12px;font-weight:600}
.fc-rows span{display:block;margin-bottom:3px;font-size:9px;letter-spacing:.14em;color:#9fb1a4}
.fc-foot{font-size:10px;letter-spacing:.12em;opacity:.75}

@keyframes tape{to{transform:translateX(-50%)}}
@keyframes drift{from{transform:translate(0,0)}to{transform:translate(-4%,6%)}}
@keyframes hsPing{0%{transform:scale(1);opacity:.8}100%{transform:scale(2.1);opacity:0}}
@keyframes flowDot{0%{left:0;opacity:0}15%,85%{opacity:1}100%{left:calc(100% - 8px);opacity:0}}
@keyframes flowDotV{0%{top:0;opacity:0}15%,85%{opacity:1}100%{top:calc(100% - 8px);opacity:0}}

/* ---------- responsive ---------- */
@media(max-width:1000px){
  .ex-stats{grid-template-columns:1fr 1fr}
  .ex-stats>div:nth-child(2n){border-right:0}
  .ex-stats>div:nth-child(-n+2){border-bottom:1px solid #ffffff1f}
  .hs-legend{grid-template-columns:1fr 1fr}
  .ex-grid{grid-template-columns:1fr 1fr}
  .ex-demo{grid-template-columns:1fr}
  .ex-flow{grid-template-columns:1fr 1fr;gap:18px}
  .ex-flow .flow-arrow{display:none}
}
@media(max-width:700px){
  .ex-tape{margin-bottom:40px}
  .ex-stats>div{padding:20px 16px}
  .ex-stats small{font-size:12px}
  .hs{width:18px;height:18px;margin:-9px 0 0 -9px}
  .hs i{font-size:9px}
  .hs-tip{display:none}
  .shot-caption span:last-child{display:none}
  .hs-legend{grid-template-columns:1fr}
  .ex-sub{margin-top:80px}
  .ex-grid{grid-template-columns:1fr}
  .ex-flow{grid-template-columns:1fr;gap:6px}
  .ex-flow .flow-arrow{display:block;width:2px;height:34px;justify-self:center;margin:6px 0;
    background:repeating-linear-gradient(180deg,#ffffff55 0 6px,transparent 6px 12px)}
  .flow-arrow::after{left:-3px;top:0;animation-name:flowDotV}
  .demo-chart,.demo-flex{padding:16px}
  .flex-card{min-height:300px;padding:20px}
}
@media(prefers-reduced-motion:reduce){.ex-tape-track{animation:none}}