:root{--ink:#152b3a;--navy:#102b3c;--canvas:#f3f7f8;--line:#dfe9eb;--muted:#71838c;--teal:#168f83;--teal-soft:#e1f3ef;--orange:#bd741c;--red:#c34f58;--shadow:0 18px 55px rgba(28,61,73,.1)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;min-width:320px;color:var(--ink);background:var(--canvas);font-family:"Noto Sans SC","Microsoft YaHei",sans-serif}button,input,select{font:inherit}button,select{cursor:pointer}.app-shell{width:min(1120px,calc(100% - 48px));margin:auto;padding:24px 0 26px}.topbar,.footer,.section-heading,.result-card-top,.value-meta,.comparison-row{display:flex;align-items:center;justify-content:space-between}.topbar{height:38px}.brand{display:inline-flex;align-items:center;gap:10px;color:var(--navy);font:700 16px/1 "DM Sans",sans-serif;text-decoration:none}.brand-mark{display:grid;width:30px;height:30px;place-items:center;color:#fff;background:var(--navy);border-radius:8px;font:700 14px "DM Sans",sans-serif}.topbar-meta{display:flex;align-items:center;gap:8px;color:var(--muted);font-size:12px}.status-dot{width:7px;height:7px;border-radius:50%;background:var(--teal);box-shadow:0 0 0 4px var(--teal-soft)}
.hero{display:flex;align-items:center;justify-content:space-between;min-height:220px;padding:40px 8px 38px}.eyebrow,.result-kicker,.formula-label{margin:0;color:var(--teal);font:700 10px/1.3 "DM Sans",sans-serif;letter-spacing:.15em}.hero h1{max-width:100%;margin:13px 0 14px;white-space:nowrap;font:700 clamp(38px,5.6vw,68px)/1.05 "DM Sans","Noto Sans SC",sans-serif;letter-spacing:-.06em}.hero h1 em{color:var(--teal);font-style:normal}.hero-copy{max-width:560px;margin:0;color:var(--muted);font-size:14px;line-height:1.75}.hero-note{display:flex;align-items:center;gap:12px;min-width:170px;padding:10px 0 10px 18px;border-left:1px solid var(--line);color:var(--muted);font-size:11px;line-height:1.7}.hero-note:first-letter{color:var(--navy);font:700 23px "DM Sans",sans-serif}
.workspace{display:grid;grid-template-columns:minmax(0,1fr) minmax(350px,.9fr);gap:26px;padding:28px;background:rgba(255,255,255,.88);border:1px solid #fff;border-radius:18px;box-shadow:var(--shadow)}.section-heading{margin-bottom:20px}.section-heading>div{display:flex;align-items:center;gap:9px}.section-index{display:grid;width:25px;height:25px;place-items:center;color:var(--teal);background:var(--teal-soft);border-radius:7px;font:700 11px "DM Sans",sans-serif}.section-heading h2{margin:0;font-size:17px;letter-spacing:-.03em}.currency-control{display:flex;align-items:center;gap:8px;color:var(--muted);font-size:11px}.currency-control select{padding:8px 28px 8px 10px;color:var(--ink);background:var(--canvas);border:1px solid var(--line);border-radius:8px;font:600 11px "DM Sans",sans-serif}.field{position:relative;display:block;min-width:0}.field-wide{margin-bottom:17px}.field-label{display:block;margin-bottom:7px;color:var(--ink);font-size:12px;font-weight:600}.field-hint{position:absolute;top:33px;right:13px;color:var(--muted);font:700 10px "DM Sans",sans-serif}.field input{width:100%;height:46px;padding:0 52px 0 13px;color:var(--ink);background:var(--canvas);border:1px solid var(--line);border-radius:8px;outline:0;transition:.2s}.field input::placeholder{color:#a9b5ba}.field input:focus{background:#fff;border-color:var(--teal);box-shadow:0 0 0 3px rgba(22,143,131,.12)}.field input[aria-invalid=true]{border-color:var(--red);box-shadow:0 0 0 3px rgba(195,79,88,.1)}.field-error{display:block;margin-top:4px;color:var(--red);font-size:10px}.date-grid{display:grid;grid-template-columns:1fr 1fr;gap:13px}.date-grid .field input{padding-right:9px}.field-note{display:flex;align-items:center;gap:7px;margin:1px 0 29px;color:var(--muted);font-size:10px;line-height:1.6}.mini-icon{display:grid;width:16px;height:16px;flex:0 0 16px;place-items:center;color:var(--teal);border:1px solid #9bcfc4;border-radius:50%;font:700 10px "DM Sans",sans-serif}.compare-heading{margin-bottom:16px}.optional-label{color:var(--muted);font-size:10px}
.input-bottom{display:grid;grid-template-columns:minmax(0,1fr) 128px;gap:12px;align-items:stretch;margin-top:5px}.rate-panel{padding:14px;background:var(--canvas);border:1px solid var(--line);border-radius:11px}.rate-panel-heading{display:flex;justify-content:space-between;align-items:flex-start;gap:8px}.rate-panel h3{margin:5px 0 0;font-size:14px}.rate-live{display:flex;align-items:center;gap:6px;color:var(--teal);font-size:10px}.rate-live .status-dot{width:5px;height:5px;box-shadow:none}.rate-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-top:13px}.rate-grid div{display:flex;flex-direction:column;gap:4px;min-width:0}.rate-grid span{color:var(--muted);font-size:9px}.rate-grid strong{color:var(--ink);font:700 12px "DM Sans",sans-serif}.rate-panel p{margin:11px 0 0;color:var(--muted);font-size:9px}.clear-button{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:6px;padding:13px 10px;color:#fff;background:var(--navy);border:1px solid var(--navy);border-radius:11px;font-size:14px;font-weight:600;transition:.2s}.clear-button small{color:#a8c0c6;font-size:10px;font-weight:400}.clear-button:hover{background:var(--teal);border-color:var(--teal);transform:translateY(-1px)}
.result-column{display:flex;flex-direction:column;gap:12px}.result-card{padding:22px;border:1px solid var(--line);border-radius:13px}.value-card{color:#fff;background:var(--navy);border-color:var(--navy)}.result-card-top{align-items:flex-start;gap:10px}.result-card h2{margin:6px 0 0;font-size:17px;letter-spacing:-.03em}.value-card h2{color:#fff}.value-card .result-kicker{color:#75d7c6}.card-chip{padding:5px 8px;color:#b6cccf;background:#264552;border-radius:99px;font-size:9px;white-space:nowrap}.big-number{display:block;margin:26px 0 22px;color:#71ddc8;font:700 clamp(34px,4vw,46px)/1 "DM Sans",sans-serif;letter-spacing:-.05em;overflow-wrap:anywhere}.value-meta{color:#b4c9cc;font-size:10px}.progress-track{height:6px;margin-top:11px;overflow:hidden;background:#294b56;border-radius:99px}.progress-fill{display:block;width:0;height:100%;background:#71ddc8;border-radius:inherit;transition:width .3s ease}.premium-card{background:#fff}.premium-card .result-kicker{color:var(--muted)}.comparison-symbol{display:grid;width:26px;height:26px;place-items:center;color:var(--teal);background:var(--teal-soft);border-radius:7px;font:700 15px "DM Sans",sans-serif}.premium-status{display:block;margin:23px 0 4px;color:var(--ink);font:700 clamp(19px,2.4vw,27px)/1.2 "Noto Sans SC","Microsoft YaHei",sans-serif;letter-spacing:-.04em}.premium-status.is-premium{color:var(--orange)}.premium-status.is-discount{color:var(--teal)}.premium-number{display:block;margin:0 0 12px;color:var(--ink);font:700 clamp(34px,4vw,46px)/1 "DM Sans",sans-serif;letter-spacing:-.06em}.premium-number.is-premium{color:var(--orange)}.premium-number.is-discount{color:var(--teal)}.premium-description{min-height:20px;margin:0 0 17px;color:var(--muted);font-size:11px;line-height:1.6}.comparison-row{padding:9px 0 0;color:var(--muted);border-top:1px solid var(--line);font-size:10px}.comparison-row+.comparison-row{margin-top:9px}.comparison-row strong{color:var(--ink);font:600 12px "DM Sans",sans-serif}.formula-card{padding:16px 18px;background:var(--canvas);border-radius:10px}.formula-card code{display:block;margin:8px 0 4px;color:var(--ink);font:600 12px "DM Sans","Noto Sans SC",sans-serif}.formula-card p{margin:0;color:var(--muted);font-size:10px;line-height:1.5}.formula-card .rate-note{margin-top:6px;color:var(--teal)}.footer{padding:19px 3px 0;color:var(--muted);font-size:10px}
@media(max-width:780px){.app-shell{width:min(100% - 28px,620px);padding-top:18px}.hero{min-height:auto;padding:45px 3px 32px}.hero h1{white-space:normal;font-size:clamp(38px,11vw,58px)}.hero-note{display:none}.workspace{grid-template-columns:1fr;padding:20px;border-radius:15px}}@media(max-width:520px){.input-bottom{grid-template-columns:1fr}.clear-button{min-height:58px;flex-direction:row;gap:8px}.rate-grid{gap:6px}}@media(max-width:480px){.topbar-meta{font-size:10px}.hero-copy{font-size:12px}.workspace{padding:16px}.section-heading{align-items:flex-start;gap:10px}.currency-control{flex-direction:column;align-items:flex-end;gap:4px}.date-grid{grid-template-columns:1fr;gap:2px}.date-grid .field{margin-bottom:13px}.big-number{font-size:37px}.footer{align-items:flex-start;flex-direction:column;gap:6px}}@media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;transition-duration:.01ms!important}}
/* Keep the calculator title compact and let the workspace become the first visual block. */
.app-shell{padding-top:18px}.hero{min-height:0;padding:30px 4px 25px}.hero h1{margin:0;color:var(--navy);font:700 clamp(32px,4.5vw,52px)/1.1 "Noto Sans SC","Microsoft YaHei",sans-serif;letter-spacing:-.06em}.hero h1 em{color:inherit}.workspace{padding:26px}.premium-percent{display:block;margin:0 0 8px;color:var(--muted);font:500 12px/1 "DM Sans","Noto Sans SC",sans-serif}.premium-percent.is-premium{color:#c08a45}.premium-percent.is-discount{color:#4aa89e}.premium-number{margin:0 0 14px;font-size:clamp(39px,4.8vw,56px);letter-spacing:-.07em}
.workspace{align-items:stretch}.input-column,.result-column{height:100%}.result-column .premium-card{flex:1}.sr-status{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.hero>div{width:100%;text-align:center}.input-column{display:flex;flex-direction:column;min-height:100%}.input-bottom{margin-top:auto;min-height:148px}.current-price-field .field-hint{top:24px;right:1px;width:47px;height:46px;display:grid;place-items:center;border-left:1px solid var(--line);background:#eef4f5;border-radius:0 7px 7px 0;text-align:center}.current-price-field input{padding-right:60px}.rate-panel{display:flex;flex-direction:column;justify-content:center}.rate-panel p{font-size:10px}.rate-grid strong{font-size:13px}.clear-button{min-height:148px}
.premium-percent{display:block;margin:0 0 8px;color:var(--muted);font:500 12px/1 "DM Sans","Noto Sans SC",sans-serif}.premium-percent.is-premium{color:#c08a45}.premium-percent.is-discount{color:#4aa89e}.premium-number{margin:0 0 14px;font-size:clamp(39px,4.8vw,56px);letter-spacing:-.07em}
.value-card{color:var(--ink);background:#e6f6f2;border-color:#c9ebe4;box-shadow:0 10px 24px rgba(22,143,131,.08)}.value-card h2{color:var(--ink)}.value-card .result-kicker{color:var(--teal)}.card-chip{color:#23766f;background:#cdebe5}.big-number{color:#159487}.value-meta{color:#5d817f}.progress-track{background:#c5e4df}.progress-fill{background:#45c5b1}.clear-button{color:#176d67;background:#dff3ef;border-color:#c2e7df}.clear-button small{color:#5e918b}.clear-button:hover{color:#fff;background:#58bcae;border-color:#58bcae}