:root{
  --bg:#f5f8f7;
  --card:#ffffff;
  --card-soft:#f9fbfa;
  --text:#18352c;
  --muted:#71827c;
  --line:#dfe9e5;
  --primary:#2f8f6b;
  --primary-strong:#237758;
  --primary-soft:#e8f5ef;
  --accent:#f2a65a;
  --accent-soft:#fff4e6;
  --gold:#dca74f;
  --gold-light:#f4d284;
  --gold-dark:#a96f25;
  --danger:#c95f5f;
  --shadow:0 18px 55px rgba(25,74,57,.08);
  --shadow-soft:0 10px 32px rgba(30,89,67,.08);
  --radius:22px;
  --g:#0b9b78;
  --g2:#12b58c;
  --dark:#0b2135;
  --footer-text:#d4ede8;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  color:var(--text);
  background:
    radial-gradient(circle at 7% 7%,rgba(71,166,127,.09),transparent 24%),
    radial-gradient(circle at 90% 15%,rgba(242,166,90,.08),transparent 22%),
    var(--bg);
  font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
}
button,input{font:inherit}
button{cursor:pointer}
a{color:inherit;text-decoration:none}
svg{display:block}
.page{width:min(1180px,calc(100% - 40px));margin:0 auto}

/* Header */
.site-header{
  position:sticky;top:0;z-index:1000;
  background:rgba(255,255,255,.94);
  backdrop-filter:blur(18px);
  -webkit-backdrop-filter:blur(18px);
  border-bottom:1px solid rgba(214,229,223,.85);
}
.site-header .nav{height:82px;display:flex;align-items:center;gap:28px}
.brand{display:flex;align-items:center;gap:12px;min-width:230px}
.site-header .mark{
  width:48px;height:48px;border-radius:15px;
  display:grid;place-items:center;flex:0 0 auto;
  color:#fff;background:linear-gradient(145deg,#17bd92,#078d6d);
  box-shadow:0 10px 24px rgba(11,155,120,.24);
}
.site-header .mark svg{width:31px;height:31px}
.brand strong{display:block;font-size:21px;line-height:1.18;letter-spacing:-.4px}
.brand small{display:block;margin-top:5px;color:#7b8b85;font-size:13px;font-weight:650;letter-spacing:.3px}
.navlinks{display:flex;align-items:center;justify-content:center;gap:26px;flex:1}
.navlinks a{position:relative;padding:28px 0 26px;font-size:16px;font-weight:700;color:#49655b;white-space:nowrap}
.navlinks a span{position:relative;display:inline-block}
.navlinks a span::after{
  content:"";position:absolute;left:50%;right:50%;bottom:-11px;height:3px;border-radius:3px;background:linear-gradient(90deg,var(--g),var(--g2));
  transition:left .22s ease,right .22s ease;
}
.navlinks a:hover,.navlinks a.active{color:#117b61}
.navlinks a:hover span::after,.navlinks a.active span::after{left:0;right:0}
.actions{display:flex;align-items:center;gap:10px}
.btn{
  height:42px;padding:0 17px;border-radius:12px;border:1px solid #d6e6e0;background:#fff;
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-size:14px;font-weight:750;color:#315b4c;transition:.2s ease;white-space:nowrap;
}
.btn svg{width:17px;height:17px}
.btn:hover{transform:translateY(-1px);box-shadow:0 7px 18px rgba(28,85,65,.1)}
.btn.primary{border-color:#168b6d;background:linear-gradient(135deg,#159b78,#238864);color:#fff;box-shadow:0 8px 18px rgba(31,137,103,.18)}
.btn.ghost:hover{border-color:#9ccdbb;color:#177458;background:#f8fcfa}
.menu{display:none;border:0;background:transparent;font-size:25px;color:#315b4c;width:42px;height:42px}
.mobile-share-link{display:none!important}

/* Hero */
.hero{text-align:center;padding:62px 0 40px}
.hero-badges{display:flex;justify-content:center;gap:10px;flex-wrap:wrap;margin-bottom:18px}
.hero-badge{
  display:inline-flex;align-items:center;gap:7px;padding:7px 12px;border:1px solid #d8e8e2;border-radius:999px;
  background:rgba(255,255,255,.76);color:#547267;font-size:12px;font-weight:750;box-shadow:0 5px 16px rgba(36,94,72,.035)
}
.hero-badge i{width:6px;height:6px;border-radius:50%;background:#2bad83;box-shadow:0 0 0 4px rgba(43,173,131,.1)}
.hero h1{margin:0;font-size:clamp(34px,5vw,54px);line-height:1.14;letter-spacing:-1.8px;color:#153c30}
.hero-title-link{transition:color .2s}
.hero-title-link:hover{color:var(--primary)}
.feature-update{margin-top:12px;color:#709087;font-size:13px;font-weight:700}
.hero p{max-width:790px;margin:15px auto 0;color:#657d74;font-size:16px;line-height:1.9}

/* Main tool */
.tool-shell{
  position:relative;background:rgba(255,255,255,.92);border:1px solid #deebe6;border-radius:28px;
  box-shadow:0 24px 72px rgba(27,82,61,.09);padding:30px;overflow:hidden;
}
.tool-shell::before{
  content:"";position:absolute;inset:0 0 auto;height:4px;background:linear-gradient(90deg,#1ba77f,#57c29c,#f2b466);
}
.tool-topline{display:flex;align-items:center;justify-content:space-between;gap:22px;padding:2px 2px 24px}
.section-kicker{display:block;color:#2d9a77;font-size:11px;font-weight:850;letter-spacing:1.5px;text-transform:uppercase}
.tool-topline h2,.content-head h2{margin:4px 0 4px;font-size:24px;line-height:1.35;color:#173e31}
.tool-topline p,.content-head p{margin:0;color:#72857e;font-size:14px}
.fair-badge{
  min-width:150px;display:grid;grid-template-columns:auto 1fr;grid-template-rows:auto auto;column-gap:9px;align-items:center;
  padding:12px 15px;border:1px solid #d6e8e0;border-radius:16px;background:#f8fcfa;
}
.fair-dot{grid-row:1/3;width:10px;height:10px;border-radius:50%;background:#20ad82;box-shadow:0 0 0 5px rgba(32,173,130,.11)}
.fair-badge strong{font-size:14px;line-height:1.2}
.fair-badge small{color:#789087;font-size:11px;font-weight:700}

.coin-workbench{display:grid;grid-template-columns:minmax(0,1.16fr) minmax(360px,.84fr);gap:20px}
.coin-stage-card,.control-card,.recent-card{
  position:relative;border:1px solid #e1ebe7;border-radius:22px;background:linear-gradient(180deg,#fbfdfc,#f7faf8);
}
.coin-stage-card{
  min-height:610px;padding:24px;overflow:hidden;display:flex;flex-direction:column;align-items:center;
  background:
    radial-gradient(circle at 50% 35%,rgba(244,210,132,.16),transparent 28%),
    linear-gradient(180deg,#fbfdfc,#f6faf8);
}
.ambient-orb{position:absolute;border-radius:50%;filter:blur(2px);pointer-events:none}
.orb-a{width:190px;height:190px;right:-70px;top:80px;background:radial-gradient(circle,rgba(45,154,119,.09),transparent 70%)}
.orb-b{width:150px;height:150px;left:-40px;bottom:70px;background:radial-gradient(circle,rgba(242,166,90,.08),transparent 70%)}
.stage-status{width:100%;display:flex;justify-content:space-between;align-items:center;gap:12px;position:relative;z-index:2}
.status-pill{
  display:inline-flex;align-items:center;gap:8px;padding:7px 11px;border-radius:999px;background:#fff;border:1px solid #ddeae5;
  color:#607a70;font-size:12px;font-weight:750;box-shadow:0 5px 14px rgba(30,86,66,.04)
}
.status-dot{width:7px;height:7px;border-radius:50%;background:#2dad83}
.status-pill.running .status-dot{animation:pulse 1s infinite}
.status-pill.done{color:#147258;background:#effaf5;border-color:#cbe9dc}
.keyboard-tip{font-size:11px;color:#8b9a95}
kbd{display:inline-flex;align-items:center;justify-content:center;height:24px;padding:0 7px;margin:0 2px;border:1px solid #d6e1dd;border-bottom-width:2px;border-radius:6px;background:#fff;color:#577067;font-size:10px;font-weight:800}

.coin-scene{
  width:240px;height:245px;margin:26px auto 0;display:flex;align-items:center;justify-content:center;perspective:1000px;position:relative;z-index:2;
}
.coin{
  --coin-rotation:0deg;
  width:180px;height:180px;position:relative;transform-style:preserve-3d;
  transform:rotateY(var(--coin-rotation));
  transition:transform 1.08s cubic-bezier(.17,.73,.22,1);
  will-change:transform;
}
.coin.fast{transition-duration:.72s}
.coin-face{
  position:absolute;inset:0;border-radius:50%;display:flex;align-items:center;justify-content:center;
  backface-visibility:hidden;-webkit-backface-visibility:hidden;
  background:
    radial-gradient(circle at 32% 25%,rgba(255,255,255,.82),transparent 17%),
    radial-gradient(circle at 50% 50%,#f8db92 0,#e9bd64 60%,#c89038 100%);
  border:7px solid #bd8431;
  box-shadow:
    inset 0 0 0 2px #f7dfa2,
    inset 0 0 0 7px rgba(255,255,255,.14),
    inset -12px -12px 26px rgba(119,70,16,.13),
    0 0 0 2px rgba(129,84,31,.08);
}
.coin-face::before{
  content:"";position:absolute;inset:7px;border-radius:50%;border:2px dashed rgba(155,102,35,.35)
}
.coin-front{transform:rotateY(0deg) translateZ(1px)}
.coin-back{transform:rotateY(180deg) translateZ(1px)}

/* 最终落定后的强制面选择：
   即使个别浏览器的 3D backface 实现异常，也不会显示镜像的错误一面。 */
.coin-stage-card:not(.is-flipping) .coin[data-side="heads"] .coin-front{
  visibility:visible;
}
.coin-stage-card:not(.is-flipping) .coin[data-side="heads"] .coin-back{
  visibility:hidden;
}
.coin-stage-card:not(.is-flipping) .coin[data-side="tails"] .coin-front{
  visibility:hidden;
}
.coin-stage-card:not(.is-flipping) .coin[data-side="tails"] .coin-back{
  visibility:visible;
}

.coin-rim{position:absolute;inset:15px;border-radius:50%;border:1.6px solid rgba(140,89,28,.38);box-shadow:inset 0 0 0 4px rgba(255,255,255,.12)}
.coin-inner{position:relative;z-index:2;text-align:center;color:#8b5b23;text-shadow:0 1px 0 rgba(255,255,255,.5)}
.coin-cn{display:block;font-size:58px;line-height:1;font-family:"STKaiti","KaiTi","Microsoft YaHei",serif;font-weight:900}
.coin-en{display:block;margin-top:9px;font-size:11px;letter-spacing:2.8px;font-weight:900;color:#946329}
.coin-star{position:absolute;color:rgba(143,91,29,.6);font-size:12px;z-index:2}
.star-1{left:32px;top:83px}.star-2{right:32px;top:83px}
.coin-shadow{
  position:absolute;width:138px;height:24px;left:50%;bottom:14px;transform:translateX(-50%);
  background:radial-gradient(ellipse,rgba(53,42,24,.18),transparent 68%);filter:blur(3px);
  transition:transform .3s,opacity .3s;
}
.coin-stage-card.is-flipping .coin-shadow{animation:shadowBounce .72s ease-in-out infinite alternate}
.coin-stage-card.is-flipping .coin{animation:coinLift .72s ease-in-out infinite alternate}

.result-display{text-align:center;position:relative;z-index:2;margin-top:4px;min-height:92px}
.result-label{display:block;color:#879790;font-size:11px;font-weight:800;letter-spacing:.9px}
.result-display strong{display:block;margin-top:4px;color:#173f31;font-size:28px;line-height:1.25}
.result-display strong.heads{color:#14765a}.result-display strong.tails{color:#9b6928}
.result-display p{margin:7px auto 0;max-width:410px;color:#74877f;font-size:13px;line-height:1.55;word-break:break-word}
.flip-main-btn{
  margin-top:auto;width:min(360px,100%);min-height:64px;border:0;border-radius:17px;
  display:flex;align-items:center;justify-content:center;gap:13px;padding:10px 18px;
  background:linear-gradient(135deg,#169a77,#258764);color:#fff;
  box-shadow:0 15px 28px rgba(31,137,103,.22);transition:.2s ease;position:relative;z-index:2;
}
.flip-main-btn:hover{transform:translateY(-2px);box-shadow:0 18px 34px rgba(31,137,103,.27)}
.flip-main-btn:active{transform:translateY(0) scale(.99)}
.flip-main-btn:disabled{cursor:not-allowed;opacity:.68;transform:none}
.flip-btn-icon{width:36px;height:36px;border-radius:50%;display:grid;place-items:center;background:rgba(255,255,255,.14)}
.flip-btn-icon svg{width:22px;height:22px}
.flip-main-btn>span:last-child{text-align:left}
.flip-main-btn strong{display:block;font-size:16px;line-height:1.25}
.flip-main-btn small{display:block;margin-top:3px;font-size:11px;font-weight:600;opacity:.84}

.control-card{padding:24px;background:#fff}
.control-section{position:relative}
.control-heading,.stats-title-row{display:flex;align-items:flex-start;justify-content:space-between;gap:14px}
.control-heading h3,.stats-title-row h3{margin:3px 0 0;font-size:17px;color:#24493d}
.text-btn,.clear-choice-btn{border:0;background:transparent;color:#3d8f73;font-size:12px;font-weight:750;padding:4px 0}
.text-btn:hover,.clear-choice-btn:hover{text-decoration:underline}
.preset-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-top:16px}
.preset-btn{
  height:42px;border:1px solid #dbe8e3;border-radius:11px;background:#fafcfb;color:#526e64;font-weight:750;font-size:13px;transition:.18s;
}
.preset-btn:hover{border-color:#9fcfbd;color:#1c795d;background:#f7fcfa}
.preset-btn.active{border-color:#58ad91;background:#eaf7f1;color:#176d55;box-shadow:inset 0 0 0 1px rgba(45,143,108,.08)}
.custom-count-row{margin-top:11px;display:flex;align-items:center;justify-content:space-between;gap:12px;color:#506b61;font-size:13px;font-weight:700}
.number-input-wrap{
  height:41px;width:160px;border:1px solid #dbe7e3;border-radius:11px;display:flex;align-items:center;background:#fff;overflow:hidden;
}
.number-input-wrap:focus-within{border-color:#75bba2;box-shadow:0 0 0 3px rgba(47,143,107,.09)}
.number-input-wrap input{width:100%;height:100%;border:0;outline:0;padding:0 10px;text-align:right;color:#24493d;background:transparent;font-weight:700}
.number-input-wrap span{padding:0 10px;color:#85968f;font-size:12px}
.field-hint{margin:8px 0 0;color:#8a9994;font-size:11px;line-height:1.55}
.control-divider{height:1px;background:#e8efec;margin:21px 0}
.accordion-trigger{
  width:100%;border:0;background:transparent;padding:0;display:flex;align-items:center;justify-content:space-between;text-align:left;color:var(--text)
}
.accordion-trigger strong{display:block;margin-top:3px;font-size:15px}
.accordion-trigger svg{width:22px;height:22px;color:#709087;transition:transform .2s}
.accordion-trigger[aria-expanded="true"] svg{transform:rotate(180deg)}
.choice-panel{padding-top:15px}
.choice-tip{display:flex;gap:8px;align-items:flex-start;padding:9px 11px;border-radius:10px;background:#f6faf8;color:#7a8d85;font-size:11px}
.choice-tip span{flex:0 0 auto;padding:1px 6px;border-radius:6px;background:#e4f3ec;color:#38876d;font-weight:800}
.choice-tip p{margin:0}
.choice-field{display:grid;grid-template-columns:76px 1fr;align-items:center;gap:10px;margin-top:10px}
.choice-side{font-size:12px;font-weight:800}
.choice-side.heads{color:#1c7d5f}.choice-side.tails{color:#9b6a2c}
.choice-field input{
  height:40px;border:1px solid #dce8e4;border-radius:10px;padding:0 11px;outline:0;color:#294b40;background:#fff;font-size:12px
}
.choice-field input:focus{border-color:#72b99f;box-shadow:0 0 0 3px rgba(47,143,107,.08)}
.clear-choice-btn{margin-top:9px}
.total-flips{display:flex;align-items:baseline;gap:3px;color:#1c745a;font-size:23px;line-height:1}
.total-flips small{font-size:11px;color:#81928b}
.stat-cards{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:15px}
.stat-card{
  min-width:0;display:grid;grid-template-columns:37px 1fr auto;align-items:center;gap:9px;padding:12px;border:1px solid #e0ebe7;border-radius:14px;background:#fbfdfc
}
.stat-card.heads{background:linear-gradient(135deg,#f6fcf9,#eef8f3)}
.stat-card.tails{background:linear-gradient(135deg,#fffaf3,#fff7eb)}
.stat-icon{width:37px;height:37px;border-radius:50%;display:grid;place-items:center;font-weight:900;font-size:13px}
.stat-card.heads .stat-icon{background:#dff3e9;color:#1e7a5e}.stat-card.tails .stat-icon{background:#f8e8ca;color:#9a6727}
.stat-card span{display:block;font-size:10px;color:#879790;font-weight:700}
.stat-card strong{display:block;margin-top:1px;font-size:19px;color:#24493d}
.stat-card b{font-size:11px;color:#6f837b}
.ratio-wrap{margin-top:16px}
.ratio-labels{display:flex;justify-content:space-between;gap:10px;font-size:10px;color:#72877f;font-weight:700}
.ratio-labels span{display:inline-flex;align-items:center;gap:5px}.ratio-labels b{color:#3d5d51}
.heads-dot,.tails-dot{width:7px;height:7px;border-radius:50%}.heads-dot{background:#43aa82}.tails-dot{background:#d4a053}
.ratio-track{height:10px;border-radius:999px;background:#edf2f0;margin-top:7px;overflow:hidden;display:flex}
.ratio-heads,.ratio-tails{height:100%;width:0;transition:width .35s ease}
.ratio-heads{background:linear-gradient(90deg,#2c9c77,#62b99b)}.ratio-tails{background:linear-gradient(90deg,#e6b45e,#d09540)}
.ratio-wrap p{margin:8px 0 0;color:#8b9994;font-size:10px;line-height:1.5}

.recent-card{margin-top:20px;padding:20px 22px;background:#fff}
.recent-head{display:flex;align-items:center;justify-content:space-between;gap:12px}
.recent-head h3{margin:3px 0 0;font-size:16px;color:#24493d}
.recent-note{font-size:11px;color:#8b9994}
.recent-empty{display:flex;align-items:center;gap:13px;padding:17px;margin-top:14px;border:1px dashed #d9e6e1;border-radius:14px;background:#fafcfb}
.recent-empty-icon{width:36px;height:36px;border-radius:11px;display:grid;place-items:center;background:#edf7f2;color:#399073;font-size:19px}
.recent-empty strong{font-size:12px}.recent-empty p{margin:3px 0 0;color:#8b9994;font-size:11px}
.recent-list{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-top:14px}
.recent-chip{
  min-width:38px;height:38px;padding:0 10px;border-radius:999px;display:inline-flex;align-items:center;justify-content:center;gap:5px;
  font-size:11px;font-weight:850;border:1px solid;
  animation:chipIn .24s ease both;
}
.recent-chip.heads{background:#eff9f4;border-color:#cee8dc;color:#21785e}
.recent-chip.tails{background:#fff8ec;border-color:#f0dfbd;color:#936326}
.recent-index{font-size:8px;opacity:.55}
.component-note{
  margin-top:20px;display:flex;align-items:center;justify-content:center;gap:8px;padding-top:19px;border-top:1px solid #e8efec;
  color:#7c8e87;font-size:11px;text-align:center
}
.lock-icon{width:20px;height:20px;color:#439577}.lock-icon svg{width:20px;height:20px}

/* Feature & content */
.feature-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin:28px 0}
.feature-strip article{display:flex;align-items:flex-start;gap:12px;background:#fff;border:1px solid #e1ebe7;border-radius:17px;padding:18px;box-shadow:0 8px 24px rgba(31,84,64,.04)}
.feature-icon{width:39px;height:39px;flex:0 0 auto;display:grid;place-items:center;border-radius:12px;background:#eaf7f1;color:#288969}
.feature-icon svg{width:21px;height:21px}
.feature-strip h3{margin:0;font-size:14px;color:#24493d}.feature-strip p{margin:5px 0 0;color:#82928c;font-size:11px;line-height:1.62}
.content-card{background:#fff;border:1px solid #e0ebe7;border-radius:22px;padding:28px;margin-bottom:22px;box-shadow:0 10px 32px rgba(32,82,64,.04)}
.content-head{margin-bottom:22px}.content-head h2{font-size:23px}
.steps-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.steps-grid article{position:relative;padding:18px;border-radius:15px;background:#f8fbfa;border:1px solid #e5eeea;overflow:hidden}
.steps-grid article>span{display:block;color:#2d9a77;font-size:11px;font-weight:900;letter-spacing:1px}
.steps-grid h3{margin:8px 0 4px;font-size:14px;color:#2c4e42}.steps-grid p{margin:0;color:#81918b;font-size:11px}
.faq-card details{border-top:1px solid #e8efec}
.faq-card details:last-child{border-bottom:1px solid #e8efec}
.faq-card summary{list-style:none;cursor:pointer;padding:17px 32px 17px 0;position:relative;color:#2f5045;font-weight:750;font-size:14px}
.faq-card summary::-webkit-details-marker{display:none}
.faq-card summary::after{content:"+";position:absolute;right:4px;top:50%;transform:translateY(-50%);font-size:23px;font-weight:400;color:#6d887e}
.faq-card details[open] summary::after{content:"−"}
.faq-card details p{margin:-3px 0 18px;color:#7f918a;font-size:12px;line-height:1.85}

/* Footer */
.site-footer{margin-top:48px;background:linear-gradient(135deg,#063f41,#07574d);color:var(--footer-text);padding:56px 0 26px}
.footer-grid{display:grid;grid-template-columns:1.5fr repeat(3,1fr);gap:44px}
.site-footer .brand{min-width:0;color:#fff}
.site-footer .brand-mark{width:48px;height:48px;border-radius:14px;display:grid;place-items:center;background:linear-gradient(145deg,#17bd92,#078d6d);color:#fff;box-shadow:0 10px 22px rgba(0,0,0,.13)}
.site-footer .brand-mark svg{width:31px;height:31px}
.site-footer .brand-copy strong{font-size:18px;color:#fff}.site-footer .brand-copy small{color:#afd3ca}
.footer-brand p{max-width:310px;margin:15px 0;color:#bcd9d2;font-size:12px;line-height:1.8}
.footer-pills{display:flex;gap:7px;flex-wrap:wrap}
.footer-pills span{padding:5px 9px;border-radius:999px;border:1px solid rgba(255,255,255,.15);background:rgba(255,255,255,.06);font-size:10px;color:#d2e8e3}
.site-footer h3{margin:4px 0 14px;color:#fff;font-size:14px}
.site-footer>div>div>a:not(.brand){display:block;margin:10px 0;color:#c4dfda;font-size:12px;transition:.18s}
.site-footer>div>div>a:not(.brand):hover{color:#fff;transform:translateX(2px)}
.footer-bottom{margin-top:38px;padding-top:20px;border-top:1px solid rgba(255,255,255,.13);display:flex;justify-content:space-between;gap:22px;color:#b6d2cd;font-size:11px}
.footer-bottom p{margin:0}

/* Share */
.share-modal{position:fixed;inset:0;z-index:2200;display:none;align-items:center;justify-content:center;padding:20px;background:rgba(5,35,33,.48);backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px)}
.share-modal.show{display:flex}
.share-dialog{width:min(520px,100%);border-radius:22px;background:#fff;box-shadow:0 26px 80px rgba(0,0,0,.2);overflow:hidden;animation:dialogIn .22s ease}
.share-dialog-head{display:flex;align-items:center;justify-content:space-between;gap:15px;padding:20px 22px;border-bottom:1px solid #e7efec;background:#fbfdfc}
.share-dialog-head strong{display:block;font-size:17px;color:#234a3d}.share-dialog-head span{display:block;margin-top:4px;color:#7e918a;font-size:11px}
.share-close{width:34px;height:34px;border:0;border-radius:10px;background:#eff5f2;color:#607a70;font-size:22px;line-height:1}
.share-dialog-body{padding:22px}
.share-qr-row{display:flex;align-items:center;gap:17px}
.share-qr-box{width:144px;height:144px;flex:0 0 auto;border:1px solid #dfe9e5;border-radius:16px;display:grid;place-items:center;background:#fff;box-shadow:0 8px 20px rgba(31,84,64,.05)}
.share-qr-box img{display:block;width:128px;height:128px}
.share-copy h3{margin:0;font-size:15px;color:#2c5043}.share-copy p{margin:6px 0 0;color:#81938c;font-size:11px;line-height:1.75}
.share-link-box{margin-top:18px;height:48px;display:flex;align-items:center;border:1px solid #dfe9e5;border-radius:12px;overflow:hidden;background:#fafcfb}
.share-link-text{min-width:0;flex:1;padding:0 12px;color:#61796f;font-size:11px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.share-action{height:36px;border:1px solid #d6e5df;border-radius:9px;background:#fff;color:#34755e;padding:0 13px;font-size:11px;font-weight:800}
.share-link-box .share-action{height:100%;border:0;border-left:1px solid #dfe9e5;border-radius:0;padding:0 16px}
.share-dialog-actions{margin-top:11px;display:flex}.share-dialog-actions .share-action{width:100%;height:43px}
.share-action.primary{border-color:#258a69;background:#218b69;color:#fff}
.share-feedback{display:none;margin-top:10px;padding:9px 11px;border-radius:9px;background:#eff9f4;color:#24795f;font-size:11px}
.share-feedback.show{display:flex;align-items:center;gap:7px}.share-feedback.error{background:#fff1f0;color:#aa5b56}
.share-feedback-icon{font-weight:900}
.share-privacy{margin-top:12px;color:#92a09b;font-size:10px;text-align:center}

/* Utilities */
.topbtn{
  position:fixed;right:22px;bottom:22px;z-index:950;width:45px;height:45px;border:1px solid #d9e8e2;border-radius:14px;
  display:grid;place-items:center;background:rgba(255,255,255,.93);color:#2b8466;box-shadow:0 10px 26px rgba(27,75,59,.13);
  opacity:0;visibility:hidden;transform:translateY(10px);transition:.2s
}
.topbtn.show{opacity:1;visibility:visible;transform:translateY(0)}.topbtn:hover{background:#f2faf6}.topbtn svg{width:22px;height:22px}
.toast{
  position:fixed;left:50%;bottom:30px;z-index:2400;transform:translate(-50%,20px);opacity:0;visibility:hidden;
  padding:10px 15px;border-radius:10px;background:#173e34;color:#fff;font-size:12px;box-shadow:0 12px 35px rgba(0,0,0,.18);transition:.22s
}
.toast.show{opacity:1;visibility:visible;transform:translate(-50%,0)}
.toast.error{background:#8e4d4a}

@keyframes pulse{0%,100%{box-shadow:0 0 0 0 rgba(45,173,131,.3)}50%{box-shadow:0 0 0 5px rgba(45,173,131,0)}}
@keyframes coinLift{from{translate:0 0}to{translate:0 -12px}}
@keyframes shadowBounce{from{transform:translateX(-50%) scale(1);opacity:.8}to{transform:translateX(-50%) scale(.72);opacity:.35}}
@keyframes chipIn{from{opacity:0;transform:scale(.85) translateY(4px)}to{opacity:1;transform:scale(1) translateY(0)}}
@keyframes dialogIn{from{opacity:0;transform:translateY(10px) scale(.98)}to{opacity:1;transform:none}}

@media(max-width:1000px){
  .site-header .nav{height:74px}
  .actions{display:none}
  .menu{display:grid;place-items:center;margin-left:auto}
  .navlinks{
    position:fixed;top:74px;left:0;right:0;display:none;flex-direction:column;align-items:stretch;gap:0;
    padding:10px 20px 18px;background:rgba(255,255,255,.98);border-bottom:1px solid #dfe9e5;box-shadow:0 18px 34px rgba(30,75,59,.09)
  }
  .navlinks.open{display:flex}
  .navlinks a{padding:12px 4px;font-size:14px}
  .navlinks a span::after{bottom:-4px}
  .mobile-share-link{display:block!important}
  .coin-workbench{grid-template-columns:1fr}
  .coin-stage-card{min-height:590px}
  .feature-strip{grid-template-columns:repeat(2,1fr)}
  .steps-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1.25fr repeat(3,1fr);gap:24px}
}
@media(max-width:720px){
  .page{width:min(100% - 24px,1180px)}
  .hero{padding:42px 0 30px}
  .hero h1{font-size:36px;letter-spacing:-1px}
  .hero p{font-size:14px;line-height:1.8}
  .tool-shell{padding:16px;border-radius:22px}
  .tool-topline{align-items:flex-start}
  .fair-badge{min-width:auto;padding:9px 11px}
  .coin-stage-card{padding:16px;min-height:545px}
  .stage-status{align-items:flex-start}
  .keyboard-tip{display:none}
  .coin-scene{width:210px;height:220px;margin-top:20px}
  .coin{width:160px;height:160px}
  .coin-cn{font-size:51px}
  .star-1{left:28px;top:73px}.star-2{right:28px;top:73px}
  .result-display strong{font-size:25px}
  .flip-main-btn{min-height:62px}
  .control-card{padding:18px}
  .preset-grid{grid-template-columns:repeat(3,1fr)}
  .stat-cards{grid-template-columns:1fr}
  .recent-card{padding:17px}
  .feature-strip{grid-template-columns:1fr;margin:20px 0}
  .content-card{padding:20px}
  .steps-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px 20px}
  .footer-brand{grid-column:1/-1}
  .footer-bottom{flex-direction:column;gap:8px}
  .share-qr-row{align-items:flex-start}
  .share-qr-box{width:122px;height:122px}.share-qr-box img{width:108px;height:108px}
}
@media(max-width:480px){
  .site-header .brand{min-width:0;gap:9px}
  .site-header .mark{width:43px;height:43px;border-radius:13px}
  .site-header .mark svg{width:28px;height:28px}
  .site-header .brand strong{font-size:16px}.site-header .brand small{font-size:10px;margin-top:3px}
  .hero-badges{gap:6px}.hero-badge{padding:6px 9px;font-size:10px}
  .hero h1{font-size:31px}
  .tool-topline{display:block}
  .fair-badge{display:inline-grid;margin-top:12px}
  .coin-stage-card{min-height:525px}
  .coin-scene{height:205px}
  .coin{width:150px;height:150px}
  .coin-cn{font-size:47px}
  .coin-en{font-size:9px}
  .star-1{left:26px;top:68px}.star-2{right:26px;top:68px}
  .number-input-wrap{width:145px}
  .choice-field{grid-template-columns:68px 1fr}
  .recent-list{gap:6px}.recent-chip{min-width:35px;height:35px;padding:0 8px}
  .footer-grid{grid-template-columns:1fr}
  .footer-brand{grid-column:auto}
  .share-dialog-body{padding:17px}
  .share-qr-row{display:block}.share-qr-box{margin:0 auto}.share-copy{text-align:center;margin-top:12px}
  .topbtn{right:14px;bottom:14px}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}
}