:root{--bg:#f4f7f6;--panel:#ffffff;--text:#17352b;--muted:#6a7b75;--line:#dfe8e4;--brand:#1f8a5b;--brand-dark:#176b47;--danger:#b42318}*{box-sizing:border-box}body{margin:0;font-family:Arial,PingFang SC,Microsoft YaHei,sans-serif;background:var(--bg);color:var(--text)}a{color:inherit;text-decoration:none}button,input,select{font:inherit}.shell{max-width:1180px;margin:0 auto;padding:28px 20px 60px}.topbar{background:#12362b;color:white}.topbar-inner{max-width:1180px;margin:0 auto;padding:16px 20px;display:flex;align-items:center;justify-content:space-between;gap:20px}.brand{font-weight:700;letter-spacing:.02em}.card{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:22px;box-shadow:0 8px 30px rgba(20,60,45,.04)}.auth-wrap{max-width:480px;margin:70px auto}.grid{display:grid;grid-gap:18px;gap:18px}.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}.row{display:flex;gap:12px;align-items:center;flex-wrap:wrap}.stack{display:grid;grid-gap:12px;gap:12px}label{font-size:14px;color:var(--muted)}input,select{width:100%;border:1px solid var(--line);border-radius:9px;padding:11px 12px;background:white}button{border:0;border-radius:9px;padding:10px 15px;cursor:pointer}.btn{background:var(--brand);color:white}.btn:hover{background:var(--brand-dark)}.btn-secondary{background:#e8f3ee;color:var(--brand-dark)}.btn-ghost{background:transparent;border:1px solid var(--line)}.muted{color:var(--muted)}.error{color:var(--danger);font-size:14px}.success{color:var(--brand-dark);font-size:14px}.kpi{font-size:28px;font-weight:700;margin-top:4px}.list{display:grid;grid-gap:10px;gap:10px}.list-item{border:1px solid 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minmax(0,1fr);align-items:start}.paste-box{margin:18px 0;display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:end;grid-gap:12px;gap:12px}textarea{width:100%;min-height:88px;border:1px solid var(--line);border-radius:9px;padding:11px 12px;font:inherit;resize:vertical}.table-scroll{overflow:auto;width:100%}.data-table,.result-table{width:100%;border-collapse:collapse;font-size:14px}.data-table td,.data-table th,.result-table td,.result-table th{border-bottom:1px solid var(--line);padding:10px 8px;text-align:left;white-space:nowrap}.data-table thead th,.result-table thead th{color:var(--muted);font-weight:600;background:#f8faf9}.data-table th small{display:block;font-weight:400;margin-top:2px}.formula-table input{min-width:92px;padding:8px}.formula-table td:first-child input{min-width:170px}.icon-btn{width:32px;height:32px;padding:0;border:1px solid var(--line);background:#fff;color:var(--danger)}.formula-actions{justify-content:space-between;margin-top:14px}.advanced{margin-top:18px;border-top:1px solid var(--line);padding-top:14px}.advanced summary{cursor:pointer;font-weight:600;margin-bottom:14px}.result-card{position:-webkit-sticky;position:sticky;top:18px}.result-title{justify-content:space-between;margin-bottom:10px}.result-title h2{margin-bottom:2px}.result-table tbody th{font-weight:600}.calc-meta{display:flex;justify-content:space-between;gap:10px;padding-top:12px}.result-note{font-size:13px;line-height:1.6;margin-bottom:0}.nutrient-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));grid-gap:12px;gap:12px}.link-btn{display:inline-block}.product-list-button{width:100%;background:#fff;text-align:left}@media (max-width:1050px){.calculator-layout,.products-layout{grid-template-columns:1fr}.result-card{position:static}.app-nav{display:none}.nutrient-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (max-width:760px){.page-head{flex-direction:column}.paste-box{grid-template-columns:1fr}.nutrient-grid{grid-template-columns:1fr 1fr}.topbar-inner{padding:13px 14px}}.permission-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));grid-gap:10px;gap:10px}.check-row{display:flex;gap:8px;align-items:center;border:1px solid var(--line);border-radius:8px;padding:9px}.check-row input{width:auto}@media (max-width:900px){.grid-3,.permission-grid{grid-template-columns:1fr}}