:root{color:#242220;font-synthesis:none;text-rendering:optimizelegibility;background:#f7f2e8;font-family:Inter,PingFang SC,Hiragino Sans GB,Microsoft YaHei,system-ui,sans-serif}*{box-sizing:border-box}html{scroll-behavior:smooth}body{min-width:320px;margin:0}button,input{font:inherit}button,a{-webkit-tap-highlight-color:transparent}main{color:#242220;background:linear-gradient(#17141109 1px,#0000 1px) 0 0/34px 34px,linear-gradient(90deg,#17141109 1px,#0000 1px) 0 0/34px 34px,linear-gradient(135deg,#fffdf8 0%,#f6efe2 62%,#e9f2e9 100%);min-height:100vh}h1,h2,h3,p{margin:0}.hero,.calculator,.tips,footer{width:min(1120px,100% - 32px);margin:0 auto}.hero{grid-template-columns:minmax(0,1.05fr) minmax(320px,.8fr);align-items:center;gap:42px;min-height:86vh;padding:54px 0 34px;display:grid}.brand{color:#242220;align-items:center;gap:10px;margin-bottom:30px;font-size:18px;font-weight:850;text-decoration:none;display:inline-flex}.brand-mark{color:#fffdf8;background:#242220;border:2px solid #242220;border-radius:14px;place-items:center;width:42px;height:42px;display:grid;box-shadow:6px 6px #f4c95d}h1{letter-spacing:0;max-width:700px;font-size:clamp(42px,6vw,68px);line-height:1.05}.hero-copy p{color:#635c55;max-width:620px;margin-top:22px;font-size:20px;line-height:1.7}.hero-actions{flex-wrap:wrap;gap:14px;margin-top:32px;display:flex}.primary-action,.secondary-action,.action-row button{color:#242220;cursor:pointer;border:2px solid #242220;border-radius:14px;justify-content:center;align-items:center;gap:8px;min-height:48px;padding:0 18px;font-weight:820;text-decoration:none;display:inline-flex;box-shadow:4px 4px #242220}.primary-action{color:#fffdf8;background:#df3f32}.secondary-action,.action-row button{background:#fffdf8}.public-link{color:#7d746c;margin-top:18px;font-size:15px}.result-card,.panel,.tips,footer{background:#fffdf8e6;border:2px solid #242220;box-shadow:8px 8px #242220}.result-card{border-radius:18px;padding:28px}.result-label,.number-field span,.formula-card span,.compare-card span,.section-title span{color:#7a6d61;font-size:14px;font-weight:820}.result-card strong{color:#df3f32;margin-top:10px;font-size:clamp(48px,6vw,66px);line-height:1;display:block}.result-card p{color:#4f4943;min-height:56px;margin-top:18px;font-size:19px;line-height:1.5}.metric-row{color:#5c554f;border-top:2px solid #24222024;justify-content:space-between;gap:18px;padding:17px 0;display:flex}.metric-row b{color:#242220;font-size:22px}.metric-row.muted b{color:#2f7a57}.calculator{grid-template-columns:1fr .82fr;gap:22px;padding:20px 0 34px;display:grid}.panel{border-radius:18px;padding:22px}.panel-title,.section-title{justify-content:space-between;align-items:center;gap:14px;display:flex}h2{letter-spacing:0;align-items:center;gap:8px;font-size:24px;line-height:1.2;display:inline-flex}.segment-grid,.mode-list,.field-grid,.compare-grid,.tip-grid{gap:12px;display:grid}.segment-grid{grid-template-columns:repeat(4,minmax(0,1fr));margin:18px 0 20px}.segment-grid button,.mode-list button{color:#242220;text-align:left;cursor:pointer;background:#fff;border:2px solid #24222033;border-radius:14px;min-height:82px}.segment-grid button{padding:12px}.segment-grid button.active,.mode-list button.active{background:#fff1b8;border-color:#242220;box-shadow:4px 4px #242220}.segment-grid span,.mode-list span{font-size:18px;font-weight:850;display:block}.segment-grid em,.mode-list em,.number-field em{color:#746b63;font-size:13px;font-style:normal;line-height:1.4}.field-grid{grid-template-columns:repeat(2,minmax(0,1fr));margin-bottom:26px}.number-field{gap:8px;display:grid}.number-field>div{background:#fff;border:2px solid #2422202e;border-radius:12px;grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:8px;min-height:48px;padding:0 12px;display:grid}.number-field.disabled{opacity:.72}input{color:#242220;background:0 0;border:0;outline:0;width:100%;font-size:20px;font-weight:820}input:disabled{color:#6d665d}.mode-list{margin-top:18px}.mode-list button{grid-template-columns:120px minmax(0,1fr);align-items:center;gap:10px;min-height:58px;padding:10px 14px;display:grid}.formula-card{background:#f3f8ee;border:2px solid #24222024;border-radius:14px;margin-top:18px;padding:18px}.formula-card strong{margin-top:8px;font-size:22px;line-height:1.35;display:block}.formula-card p{color:#5d554e;margin-top:12px;line-height:1.7}.compare-grid{grid-template-columns:1fr;margin-top:16px}.compare-card{border:2px solid #242220;border-radius:14px;justify-content:space-between;align-items:center;gap:12px;min-height:62px;padding:14px;display:flex}.compare-card.green{background:#d9f0d4}.compare-card.cream{background:#fff7dd}.compare-card.red{background:#ffd8cf}.compare-card strong{font-size:24px}.action-row{flex-wrap:wrap;gap:12px;margin-top:18px;display:flex}.tips{border-radius:18px;margin-top:20px;padding:24px}.tip-grid{grid-template-columns:repeat(5,minmax(0,1fr));margin-top:18px}.tip-grid article{background:#fffdf8;border:2px solid #24222029;border-radius:14px;min-height:138px;padding:14px}.tip-grid svg{color:#2f7a57}.tip-grid p{color:#4e4842;margin-top:12px;font-weight:680;line-height:1.5}footer{color:#6b625a;border-radius:18px;justify-content:space-between;align-items:center;gap:18px;margin-top:22px;margin-bottom:36px;padding:18px;line-height:1.5;display:flex}footer a{color:#242220;align-items:center;gap:8px;font-weight:820;text-decoration:none;display:inline-flex}@media (width<=900px){.hero,.calculator{grid-template-columns:1fr}.hero{min-height:auto;padding-top:30px}.tip-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (width<=640px){.hero,.calculator,.tips,footer{width:min(100% - 24px,520px)}h1{font-size:42px}.hero-copy p{font-size:17px}.result-card,.panel,.tips,footer{box-shadow:5px 5px #242220}.segment-grid,.field-grid,.tip-grid,.mode-list button{grid-template-columns:1fr}.action-row button,.primary-action,.secondary-action{width:100%}footer{flex-direction:column;align-items:flex-start}}