:root{--calc-bg-deep: #06060f;--calc-bg: #0a0a1a;--calc-bg-elevated: #111128;--calc-glass: rgba(255, 255, 255, .05);--calc-glass-hover: rgba(255, 255, 255, .08);--calc-glass-border: rgba(255, 255, 255, .1);--calc-glass-border-hover: rgba(255, 255, 255, .18);--calc-ink: #e8ecf2;--calc-ink-secondary: #94a3b8;--calc-ink-muted: #5c6a7d;--calc-gradient-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 30%, #06b6d4 100%);--calc-accent: #818cf8;--calc-accent-cyan: #22d3ee;--calc-accent-purple: #a78bfa;--calc-energy: #f59e0b;--calc-green: #34d399;--calc-red: #f87171;--calc-glow-purple: 0 0 20px rgba(99, 102, 241, .25), 0 0 60px rgba(99, 102, 241, .1);--calc-glow-cyan: 0 0 20px rgba(6, 182, 212, .2);--calc-radius-sm: 8px;--calc-radius: 12px;--calc-radius-lg: 16px;--calc-shadow-lg: 0 8px 40px rgba(0, 0, 0, .4);color:var(--calc-ink);background:var(--calc-bg-deep);font-family:system-ui,-apple-system,Segoe UI,Roboto,Helvetica Neue,Arial,Noto Sans,Microsoft YaHei,sans-serif}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}body{min-width:320px;background:var(--calc-bg)}button{font:inherit;cursor:pointer;border:0}input{font:inherit}body:before{content:"";position:fixed;inset:0;z-index:0;pointer-events:none;background-image:radial-gradient(rgba(255,255,255,.03) 1px,transparent 1px);background-size:32px 32px}.calculator-page{min-height:100vh;overflow-x:hidden;position:relative;z-index:1}.calculator-header,.calculator-hero,.calculator-workspace,.calculator-reference,.calculator-method{width:min(1180px,calc(100% - 48px));margin-inline:auto}.calculator-header{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:76px;border-bottom:1px solid var(--calc-glass-border)}.calculator-wordmark{display:flex;align-items:baseline;gap:0;font-size:15px;font-weight:700;letter-spacing:.04em;color:var(--calc-ink);text-decoration:none}.calculator-wordmark span{color:var(--calc-ink-secondary);font-weight:400}.calculator-wordmark strong{background:var(--calc-gradient-primary);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.back-link{padding:8px 16px;border-radius:var(--calc-radius-sm);font-size:13.5px;font-weight:500;color:var(--calc-ink-secondary);text-decoration:none;transition:all .2s ease}.back-link:hover{background:var(--calc-glass);color:var(--calc-ink)}.calculator-language{display:flex;align-items:center;gap:12px;font-size:13px;font-weight:500}.calculator-language a{color:var(--calc-ink-secondary);padding:6px 14px;border-radius:var(--calc-radius-sm);transition:all .15s}.calculator-language a:hover{background:var(--calc-glass);color:var(--calc-ink)}.calculator-language span{color:var(--calc-ink-muted)}.calculator-hero{padding:64px 0 42px}.calculator-kicker{display:inline-flex;align-items:center;gap:8px;margin-bottom:18px;padding:6px 14px;border-radius:20px;border:1px solid rgba(99,102,241,.2);background:#6366f11a;color:var(--calc-accent);font-size:12px;font-weight:600;letter-spacing:.04em;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.calculator-hero h1{max-width:720px;margin-bottom:20px;font-size:clamp(38px,5vw,56px);font-weight:800;letter-spacing:-.02em;line-height:1.1;background:linear-gradient(135deg,#e8ecf2,#818cf8 40%,#22d3ee);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.calculator-hero>p{max-width:640px;color:var(--calc-ink-secondary);font-size:16px;line-height:1.7}.calculator-workspace{display:grid;grid-template-columns:minmax(0,1fr) minmax(350px,.75fr);gap:28px;align-items:start;padding:44px 0 80px}.calculator-inputs{padding:0}.workspace-heading h2{font-size:clamp(24px,3vw,34px);font-weight:800;margin-bottom:10px;color:var(--calc-ink)}.workspace-heading>p{color:var(--calc-ink-secondary);font-size:14px;line-height:1.7}.scenario-picker{margin:28px 0 24px;border:0;padding:20px;border-radius:var(--calc-radius);background:var(--calc-glass);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:1px solid var(--calc-glass-border)}.scenario-picker legend{margin-bottom:12px;font-size:14px;font-weight:700;color:var(--calc-ink)}.scenario-picker>div{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}.scenario-picker button{padding:14px 16px;border-radius:var(--calc-radius-sm);border:1px solid var(--calc-glass-border);background:#ffffff05;color:var(--calc-ink-secondary);text-align:left;transition:all .2s ease}.scenario-picker button:hover{border-color:var(--calc-accent);background:#6366f114;box-shadow:var(--calc-glow-purple)}.scenario-picker button.is-selected{border-color:var(--calc-accent);background:#6366f11f;box-shadow:0 0 0 2px #6366f126}.scenario-picker strong{display:block;font-size:15px;font-weight:700;color:var(--calc-ink)}.scenario-picker small{display:block;margin-top:4px;color:var(--calc-ink-secondary);font-size:12px;line-height:1.4}.scenario-picker>p,.geometry-option p,.geometry-result,.input-warning{margin-top:10px;color:var(--calc-ink-muted);font-size:12px;line-height:1.5}.input-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.input-grid label{display:grid;gap:6px;font-size:13px;font-weight:600;color:var(--calc-ink)}.input-grid label span{color:var(--calc-ink-secondary);font-weight:400}.input-grid input{width:100%;min-height:46px;padding:10px 14px;border:1px solid var(--calc-glass-border);border-radius:var(--calc-radius-sm);background:#ffffff08;color:var(--calc-ink);font-size:16px;font-weight:600;transition:all .2s ease}.input-grid input:focus{border-color:var(--calc-accent);outline:none;box-shadow:0 0 0 3px #6366f126;background:#6366f10d}.input-grid input:disabled{color:var(--calc-ink-muted);background:#ffffff05}.wide-field{grid-column:1 / -1}.input-warning{color:var(--calc-red)}.advanced-settings{margin-top:22px;border-radius:var(--calc-radius);border:1px solid var(--calc-glass-border);background:var(--calc-glass);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);overflow:hidden}.advanced-settings summary{padding:16px 20px;cursor:pointer;font-size:14px;font-weight:700;color:var(--calc-ink);transition:background .15s}.advanced-settings summary:hover{background:var(--calc-glass-hover)}.advanced-settings[open] summary{border-bottom:1px solid var(--calc-glass-border);background:var(--calc-glass-hover)}.geometry-option{padding:16px 20px;border-bottom:1px solid var(--calc-glass-border)}.geometry-option label{display:flex;align-items:center;gap:10px;font-size:13px;font-weight:600;color:var(--calc-ink)}.geometry-grid{padding:16px 20px}.geometry-result{padding:0 20px 20px;color:var(--calc-ink-secondary)}.geometry-result strong{color:var(--calc-ink)}.calculator-result{position:sticky;top:20px;min-height:520px;padding:32px;border-radius:var(--calc-radius-lg);background:linear-gradient(145deg,#111128,#1a1a3a);border:1px solid rgba(99,102,241,.15)}.calculator-result .calculator-kicker{border-color:#6366f133;background:#6366f11a;color:var(--calc-accent);margin-bottom:14px}.calculator-result h2{color:var(--calc-ink);font-size:clamp(24px,3vw,32px);font-weight:800;margin-bottom:10px}.status-detail{margin:12px 0 24px;color:var(--calc-ink-secondary);font-size:14px;line-height:1.65}.metric-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));border-radius:var(--calc-radius-sm);overflow:hidden;border:1px solid var(--calc-glass-border)}.metric-grid>div{padding:22px 18px;border-right:1px solid var(--calc-glass-border);border-bottom:1px solid var(--calc-glass-border);background:#ffffff05}.metric-grid>div:nth-child(2),.metric-grid>div:nth-child(4){border-right:0}.metric-grid>div:nth-child(3),.metric-grid>div:nth-child(4){border-bottom:0}.metric-grid span{display:block;color:var(--calc-ink-muted);font-size:12px;font-weight:500}.metric-grid strong{display:block;margin-top:10px;font-size:clamp(22px,2.5vw,30px);font-weight:800;line-height:1.1;color:var(--calc-ink)}.metric-grid strong.surplus{color:#34d399}.metric-grid strong.balanced{color:var(--calc-energy)}.metric-grid strong.gap{color:#f87171}.metric-grid small{display:block;margin-top:2px;color:var(--calc-ink-muted);font-size:12px}.result-notes{margin:20px 0 0;padding-top:16px;border-top:1px solid var(--calc-glass-border)}.result-notes div{display:flex;justify-content:space-between;gap:12px;padding:8px 0;font-size:13px}.result-notes div:not(:last-child){border-bottom:1px solid rgba(255,255,255,.04)}.result-notes dt{color:var(--calc-ink-muted)}.result-notes dd{margin:0;color:var(--calc-ink);font-weight:600;text-align:right}.recommendation{margin:16px 0 0;padding:12px 16px;border-radius:var(--calc-radius-sm);background:#6366f11a;border:1px solid rgba(99,102,241,.15);color:var(--calc-accent);font-size:13px;line-height:1.6;font-weight:500}.notice{margin:12px 0 0;color:var(--calc-ink-muted);font-size:12.5px;line-height:1.6}.export-button,.reset-button{width:100%;min-height:46px;margin-top:18px;border-radius:var(--calc-radius-sm);background:var(--calc-gradient-primary);color:#fff;font-size:14px;font-weight:700;transition:all .3s ease;cursor:pointer;box-shadow:0 4px 20px #6366f14d}.export-button:hover{transform:translateY(-2px);box-shadow:0 8px 30px #6366f180}.reset-button{margin-top:8px;background:#ffffff0d;border:1px solid var(--calc-glass-border);color:var(--calc-ink);box-shadow:none}.reset-button:hover{background:#ffffff14;box-shadow:var(--calc-glow-purple);transform:none}.calculator-next-step{margin-top:18px;color:var(--calc-ink-secondary);font-size:14px;line-height:1.7}.calculator-next-step a{color:var(--calc-accent);font-weight:700;text-decoration-thickness:1px;text-underline-offset:3px}.calculator-next-step a:hover{color:var(--calc-ink)}.calculator-reference{padding:80px 0;border-top:1px solid var(--calc-glass-border)}.calculator-reference h2{font-size:28px;font-weight:800;margin-bottom:8px;color:var(--calc-ink)}.calculator-reference .section-intro p{color:var(--calc-ink-secondary);font-size:15px}.performance-table-wrap{margin-top:32px;border-radius:var(--calc-radius);overflow:hidden;border:1px solid var(--calc-glass-border);overflow-x:auto}.performance-table-wrap table{width:100%;min-width:700px;border-collapse:collapse;background:var(--calc-glass);font-size:13px}.performance-table-wrap thead{background:#ffffff0a}.performance-table-wrap th{padding:14px 16px;text-align:right;font-size:11px;font-weight:700;color:var(--calc-ink-muted);text-transform:uppercase;letter-spacing:.04em;border-bottom:1px solid var(--calc-glass-border)}.performance-table-wrap th:first-child,.performance-table-wrap td:first-child{text-align:left}.performance-table-wrap td{padding:14px 16px;border-bottom:1px solid var(--calc-glass-border);color:var(--calc-ink-secondary);text-align:right}.performance-table-wrap tbody tr:hover{background:var(--calc-glass-hover)}.performance-table-wrap tbody th{color:var(--calc-ink);font-weight:700}.calculator-method{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);gap:56px;padding:0 0 90px}.calculator-method>details{align-self:flex-start;border-radius:var(--calc-radius);border:1px solid var(--calc-glass-border);background:var(--calc-glass);overflow:hidden}.calculator-method>details summary{padding:18px 24px;cursor:pointer;font-size:16px;font-weight:700;color:var(--calc-ink)}.calculator-method>details summary:hover{background:var(--calc-glass-hover)}.calculator-method>details p{margin:0;padding:0 24px 18px;color:var(--calc-ink-secondary);font-size:14px;line-height:1.75}.calculator-faq h2{font-size:28px;font-weight:800;margin-bottom:20px;color:var(--calc-ink)}.calculator-faq details{padding:16px 0;border-top:1px solid var(--calc-glass-border)}.calculator-faq details:last-child{border-bottom:1px solid var(--calc-glass-border)}.calculator-faq summary{cursor:pointer;font-size:15px;font-weight:700;color:var(--calc-ink)}.calculator-faq p{margin:10px 0 0;color:var(--calc-ink-secondary);font-size:14px;line-height:1.7}@media(max-width:900px){.calculator-workspace,.calculator-method{grid-template-columns:1fr}.calculator-result{position:static;min-height:auto}.calculator-method{gap:36px}}@media(max-width:640px){.calculator-header{min-height:64px;padding:0 4px}.calculator-wordmark{font-size:13px}.back-link{font-size:12px}.calculator-hero{padding:40px 0 30px}.calculator-hero h1{font-size:34px}.calculator-workspace{padding:28px 0 48px}.scenario-picker>div{grid-template-columns:1fr}.scenario-picker{padding:16px}.input-grid{grid-template-columns:1fr}.wide-field{grid-column:auto}.calculator-result{padding:24px 20px}.metric-grid>div{padding:16px 14px}.calculator-reference{padding:56px 0}.calculator-method{padding-bottom:56px}}