:root{--paper:#f7f5ec;--ink:#243d34;--orange:#e8673d;--line:#d8dbce}*{box-sizing:border-box;margin:0;padding:0}body{font-family:'PingFang SC','Microsoft YaHei',sans-serif;background:transparent;color:var(--ink)}button,input{font:inherit}button{cursor:pointer}button:focus-visible,input:focus-visible,a:focus-visible{outline:3px solid var(--orange);outline-offset:3px}.standalone{background:var(--paper);min-height:100vh;background-image:radial-gradient(#243d3420 1px,transparent 1px);background-size:22px 22px}.standalone-entry{padding:30px;display:flex;justify-content:space-between;align-items:center;gap:20px}.standalone-entry a{color:var(--ink);font-size:13px;text-decoration:none}.modal-overlay{position:fixed;inset:0;background:#1d322ac2;backdrop-filter:blur(8px);display:flex;justify-content:center;align-items:center;z-index:9999;padding:24px}.modal-container{background:var(--paper);border:1px solid #d8dfce;border-radius:15px;max-width:490px;width:100%;max-height:calc(100dvh - 48px);box-shadow:12px 12px 0 #0e241f40;display:flex;flex-direction:column;position:relative;overflow:hidden}.modal-header{background:#e2e8d5;padding:27px 30px 25px;position:relative;flex-shrink:0;border-bottom:1px solid #c6d0bd;overflow:hidden}.supply-label{font-size:8px;letter-spacing:2px}.modal-title{font-size:29px;letter-spacing:-1px;line-height:1.35;margin:15px 0 10px;position:relative;z-index:1;font-weight:800}.modal-subtitle{font-size:11px;color:#6c7966}.supply-art{position:absolute;right:10px;bottom:15px;width:146px;height:146px;object-fit:contain;transform:rotate(15deg)}.close-button{position:absolute;right:15px;top:12px;font-size:25px;color:var(--ink);width:30px;height:30px;border:1px solid #243d3440;border-radius:50%;background:transparent;line-height:25px}.modal-body{padding:24px 30px 0;overflow-y:auto;flex:1}.info-section{padding-bottom:18px;margin-bottom:18px;border-bottom:1px solid var(--line)}.info-section:last-child{border:0;margin-bottom:0}.section-title{font-size:10px;color:#7a8473;letter-spacing:2px;margin-bottom:13px}.info-row{display:flex;justify-content:space-between;align-items:center;gap:20px;margin:10px 0;font-size:12px}.info-label{color:#75806f;flex-shrink:0}.info-value{text-align:right;font-weight:600;overflow-wrap:anywhere;min-width:0}.price-highlight{color:var(--orange)}.payment-badge{background:#e5eddf;border:1px solid #cedbc5;padding:7px 12px;border-radius:4px;font-size:11px}.payment-badge::before{content:'✓';margin-right:8px}.amount-presets{display:grid;grid-template-columns:repeat(4,1fr);gap:9px;margin-bottom:18px}.amount-presets button{border:1px solid #cbd1c3;background:transparent;border-radius:5px;padding:11px 0;color:var(--ink);font-weight:650}.amount-presets button.selected{background:var(--ink);border-color:var(--ink);color:var(--paper)}.amount-presets button:hover{border-color:var(--orange)}.input-label{font-size:11px;display:block;margin-bottom:8px;color:#75806f}.input-wrapper{position:relative}.input-field{width:100%;height:48px;background:#fffdf7;border:1px solid #cbd1c3;border-radius:5px;padding:0 42px 0 14px;font-size:18px;color:var(--ink)}.input-unit{position:absolute;right:16px;top:15px;font-size:12px;color:#7b8574}.error-message{display:none;color:#b44325;font-size:11px;margin-top:8px}.error-message.show{display:block}.exchange-info{display:flex;justify-content:space-between;align-items:center;margin:15px 0 5px}.exchange-label{font-size:12px}.exchange-value{font-size:20px;font-weight:700;color:var(--orange)}.exchange-rate{font-size:10px;color:#858c7e}.price-display{display:flex;justify-content:space-between;align-items:center}.price-label{font-size:12px}.price-value{font-size:31px;font-weight:750;color:var(--ink)}.price-unit{font-size:11px;margin-left:5px;font-weight:400}.modal-footer{display:flex;gap:12px;padding:18px 30px 24px;flex-shrink:0;border-top:1px dashed var(--line)}.btn{padding:14px 18px;border-radius:5px;border:0;font-size:13px;font-weight:600;transition:background .2s}.btn-cancel{background:#e6e9de;color:var(--ink);flex:1}.btn-confirm{background:var(--orange);color:#fff;flex:2}.btn-confirm:hover{background:#d6552c}.btn:disabled{opacity:.45;cursor:not-allowed}.loading-overlay{position:absolute;inset:0;background:#f7f5ecf2;display:none;align-items:center;justify-content:center;z-index:10}.loading-overlay.show{display:flex}.loading-content{text-align:center}.loading-spinner{width:40px;height:40px;border:3px solid var(--line);border-top-color:var(--orange);border-radius:50%;animation:spin 1s linear infinite;margin:0 auto 16px}.loading-text{font-size:13px}.pay-link-section{display:none;background:#f0e8cd;padding:15px;margin-top:15px;border-radius:5px}.pay-link-section.show{display:block}.pay-link-title{font-size:13px;font-weight:600}.pay-link-text{font-size:11px;margin:10px 0;line-height:1.7}.pay-link-url{font-size:10px;overflow-wrap:anywhere;background:#fff9e8;padding:8px}.btn-open-link{width:100%;padding:12px;background:var(--ink);color:white;border:0;border-radius:4px;margin-top:10px;font-size:12px}@keyframes spin{to{transform:rotate(360deg)}}@media(max-width:480px){.modal-overlay{padding:14px}.modal-container{max-height:calc(100dvh - 28px)}.modal-header{padding:22px}.modal-title{font-size:26px}.supply-art{width:115px;height:115px;right:0;bottom:20px}.supply-label{font-size:7px;letter-spacing:1px}.modal-body{padding:20px 22px 0}.modal-footer{padding:15px 22px 20px}.info-section{padding-bottom:14px;margin-bottom:14px}.standalone-entry{padding:20px;flex-direction:column}.amount-presets{gap:7px}}@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}