:root{--bg:#f6f8f8;--surface:#fff;--surface2:#fbfdfd;--ink:#132225;--muted:#5f7075;--line:#dce4e6;--brand:#0d766e;--brand-dark:#095c56;--brand-soft:#e6f5f2;--blue-soft:#edf7ff;--blue:#245f7a;--warn-bg:#fff8e7;--warn:#78530b;--bad:#b42318;--good:#087a5b;--shadow:0 16px 44px rgba(18,48,52,.08);--radius:18px;--radius-sm:12px;--max:1180px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;line-height:1.55;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}button,input,select{font:inherit}.wrap{width:min(var(--max),calc(100% - 34px));margin:auto}.skip{position:absolute;left:-9999px;top:auto}.skip:focus{left:12px;top:12px;z-index:100;background:#fff;padding:10px;border-radius:8px;box-shadow:var(--shadow)}
.topbar{background:#0b2527;color:#d8eeeb;font-size:12px;padding:7px 0}.nav{position:sticky;top:0;z-index:30;background:rgba(255,255,255,.96);border-bottom:1px solid var(--line);backdrop-filter:blur(12px)}.navrow{height:70px;display:flex;align-items:center;gap:28px}.brand{font-size:22px;font-weight:900;letter-spacing:-.04em;color:#0d3938;white-space:nowrap}.brand span{color:var(--brand)}.navlinks{display:flex;gap:20px;font-size:14px;color:#3f5256}.navlinks a:hover,.navlinks a[aria-current=page]{color:var(--brand)}.navcta{margin-left:auto;background:var(--brand);color:#fff;padding:10px 15px;border-radius:11px;font-weight:800;font-size:14px}.navcta:hover{background:var(--brand-dark)}.menu-toggle{display:none;margin-left:auto;border:1px solid var(--line);background:#fff;border-radius:10px;padding:9px 11px}.mobile-nav{display:none;border-top:1px solid var(--line);background:#fff}.mobile-nav.open{display:block}.mobile-nav a{display:block;padding:12px 17px;border-bottom:1px solid #eef2f3;font-size:14px}
.hero{padding:78px 0 54px;background:linear-gradient(180deg,#ecf8f6 0%,var(--bg) 100%)}.hero-grid{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(360px,.9fr);gap:42px;align-items:center}.eyebrow{display:inline-flex;align-items:center;gap:7px;background:#dff3ef;color:#0c5f58;border:1px solid #c3e6df;border-radius:999px;padding:6px 10px;font-size:13px;font-weight:800}.hero h1{font-size:clamp(44px,6vw,76px);line-height:.98;letter-spacing:-.06em;margin:18px 0 20px}.hero p{font-size:19px;color:#52656a;max-width:740px;margin:0}.heroactions{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:0;border-radius:12px;padding:12px 16px;font-weight:800;cursor:pointer;transition:.15s transform,.15s background,.15s border}.btn:hover{transform:translateY(-1px)}.btn.primary{background:var(--brand);color:#fff}.btn.primary:hover{background:var(--brand-dark)}.btn.secondary{background:#fff;border:1px solid var(--line);color:#24373b}.btn.small{padding:9px 12px;font-size:13px}.hero-card{background:#fff;border:1px solid var(--line);border-radius:22px;box-shadow:var(--shadow);padding:22px}.hero-card h2{font-size:20px;margin:0 0 4px}.hero-card p{font-size:14px}.snapshot{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;margin-top:18px}.snap{background:#f8fbfb;border:1px solid var(--line);border-radius:13px;padding:13px}.snap b{display:block;font-size:22px;letter-spacing:-.03em}.snap span{font-size:11px;color:var(--muted);text-transform:uppercase;letter-spacing:.07em;font-weight:800}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:38px}.stat{background:#fff;border:1px solid var(--line);border-radius:14px;padding:17px}.stat strong{display:block;font-size:23px}.stat span{font-size:13px;color:var(--muted)}.seo-strip{background:#fff;border-block:1px solid var(--line);padding:15px 0}.seo-strip .wrap{display:flex;flex-wrap:wrap;align-items:center;gap:8px}.seo-strip b{margin-right:4px}.seo-strip a{font-size:13px;padding:6px 9px;background:#f2f6f6;border-radius:8px;color:#415458}
.section{padding:54px 0}.section.alt{background:#fff;border-block:1px solid #eef2f3}.section h2{font-size:35px;letter-spacing:-.04em;margin:0 0 8px}.sectionlead{margin:0 0 28px;color:var(--muted);max-width:790px}.toolgrid{display:grid;grid-template-columns:repeat(4,1fr);gap:15px}.toolcard{background:#fff;border:1px solid var(--line);border-radius:17px;padding:20px;transition:.18s transform,.18s box-shadow,.18s border}.toolcard:hover{transform:translateY(-2px);box-shadow:var(--shadow);border-color:#c7d8da}.toolicon{width:44px;height:44px;border-radius:12px;background:var(--brand-soft);color:var(--brand);display:grid;place-items:center;font-weight:900;margin-bottom:15px}.toolcard h3{font-size:18px;margin:0 0 5px}.toolcard p{font-size:14px;color:var(--muted);margin:0}.toolcard .tag{display:inline-block;margin-top:12px;font-size:11px;font-weight:800;color:#607378;background:#f3f6f7;padding:4px 7px;border-radius:7px}.flow{display:grid;grid-template-columns:repeat(5,1fr);gap:8px;margin-top:25px}.flowstep{position:relative;background:#fff;border:1px solid var(--line);border-radius:12px;padding:15px;text-align:center;font-size:13px;font-weight:800}.flowstep:not(:last-child):after{content:'→';position:absolute;right:-10px;top:50%;transform:translateY(-50%);background:var(--bg);padding:0 3px;color:#8a9ca0}
.panel{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden}.panelhead{padding:22px 24px;border-bottom:1px solid var(--line)}.panelhead h1,.panelhead h2{margin:0 0 6px;letter-spacing:-.035em}.panelhead p{margin:0;color:var(--muted)}.panelbody{padding:24px}.planner{display:grid;grid-template-columns:1.05fr .95fr;gap:22px;align-items:start}.formgrid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.field{display:flex;flex-direction:column;gap:6px}.field.full{grid-column:1/-1}.field label{font-size:13px;font-weight:800;color:#3c4f53}.inputwrap{display:flex;border:1px solid #cfdadd;border-radius:11px;background:#fff;overflow:hidden}.inputwrap:focus-within{border-color:#75aaa5;box-shadow:0 0 0 3px rgba(13,118,110,.09)}.inputwrap input,.inputwrap select{width:100%;border:0;outline:0;padding:11px 12px;background:transparent;color:var(--ink)}.unit{border-left:1px solid var(--line);padding:11px 10px;min-width:46px;text-align:center;background:#f9fbfb;color:var(--muted);font-size:13px}.hint{font-size:12px;color:var(--muted)}.actions{display:flex;gap:9px;flex-wrap:wrap;margin-top:18px}.divider{height:1px;background:var(--line);margin:20px 0}.notice{padding:12px 14px;border-radius:12px;font-size:13px;background:var(--warn-bg);border:1px solid #f0d68e;color:var(--warn)}.notice.info{background:var(--blue-soft);border-color:#cce5f5;color:var(--blue)}.error{padding:10px 12px;border-radius:10px;background:#fff0ef;color:var(--bad);border:1px solid #f0cbc7;font-size:13px;margin-bottom:14px}.badge{display:inline-flex;align-items:center;padding:5px 8px;border-radius:8px;background:#eef4f4;color:#506468;font-size:12px;font-weight:800}.resultstack{display:grid;gap:12px}.resultgrid{display:grid;grid-template-columns:repeat(2,1fr);gap:11px}.resultcard{padding:16px;border:1px solid var(--line);border-radius:14px;background:#fbfdfd}.resultcard.primaryresult{background:#eaf8f5;border-color:#b9e6dc}.resultcard .label{font-size:11px;text-transform:uppercase;letter-spacing:.075em;color:var(--muted);font-weight:900}.resultcard .value{font-size:28px;font-weight:900;letter-spacing:-.04em;margin-top:3px}.resultcard .sub{font-size:13px;color:var(--muted);margin-top:2px}.summaryline{display:flex;justify-content:space-between;gap:12px;padding:9px 0;border-bottom:1px dashed #d6e0e2;font-size:14px}.summaryline:last-child{border-bottom:0}.summaryline span:last-child{font-weight:800;text-align:right}
.calcpage{padding:36px 0 72px}.breadcrumbs{font-size:13px;color:var(--muted);margin:0 0 15px}.breadcrumbs a{color:#41656a}.calcintro{margin-bottom:18px}.calcintro h1{font-size:clamp(34px,5vw,52px);line-height:1.03;letter-spacing:-.05em;margin:0 0 10px}.calcintro p{margin:0;color:var(--muted);font-size:17px;max-width:820px}.calcgrid{display:grid;grid-template-columns:minmax(0,1fr) 390px;gap:22px;align-items:start}.resultsticky{position:sticky;top:92px}.content{max-width:850px;margin-top:34px}.content h2{font-size:26px;letter-spacing:-.03em;margin:34px 0 8px}.content h3{font-size:19px;margin:24px 0 7px}.content p,.content li{color:#4e6064}.content ul,.content ol{padding-left:22px}.formula{background:#fff;border:1px solid var(--line);border-radius:13px;padding:15px 17px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:14px;overflow:auto}.related{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}.related a{font-size:13px;padding:7px 9px;border:1px solid var(--line);background:#fff;border-radius:8px}.visual{margin-top:16px;border:1px solid var(--line);border-radius:14px;background:#f8fbfb;padding:12px;overflow:hidden}.visual svg{width:100%;height:auto;min-height:180px}.pallet-base,.container-base{fill:#e8efef;stroke:#8ea1a4;stroke-width:1.5}.carton-rect{fill:#9fd7cf;stroke:#0d766e;stroke-width:1}.legend{font-size:12px;color:var(--muted);margin-top:8px}
.data-table{width:100%;border-collapse:collapse;font-size:13px}.data-table th,.data-table td{padding:8px 6px;border-bottom:1px solid var(--line);text-align:left;vertical-align:middle}.data-table th{font-size:11px;text-transform:uppercase;letter-spacing:.06em;color:var(--muted)}.table-scroll{overflow:auto}.table-input{width:100%;min-width:82px;border:1px solid #d5dfe1;border-radius:8px;padding:8px;background:#fff}.table-input.qty{min-width:64px}.table-input.sku-name{min-width:110px}.icon-btn{border:1px solid var(--line);background:#fff;width:34px;height:34px;border-radius:8px;cursor:pointer}.icon-btn.danger{color:var(--bad)}.toolbar{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:12px;flex-wrap:wrap}.toolbar-group{display:flex;gap:8px;align-items:center}.toolbar select{border:1px solid var(--line);background:#fff;border-radius:9px;padding:8px 10px}.kicker{font-size:12px;font-weight:900;text-transform:uppercase;letter-spacing:.08em;color:var(--brand)}
.guide-hero{padding:52px 0 26px}.guide-hero h1{font-size:clamp(36px,5vw,58px);letter-spacing:-.05em;line-height:1.04;margin:8px 0 12px;max-width:900px}.guide-hero p{max-width:800px;color:var(--muted);font-size:18px}.article-wrap{display:grid;grid-template-columns:minmax(0,760px) 260px;gap:50px;align-items:start}.article{background:#fff;border:1px solid var(--line);border-radius:18px;padding:30px}.article h2{font-size:27px;letter-spacing:-.03em;margin-top:34px}.article h2:first-child{margin-top:0}.article p,.article li{color:#4c5f63}.aside-card{position:sticky;top:90px;background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px}.aside-card h3{margin:0 0 10px;font-size:15px}.aside-card a{display:block;font-size:13px;color:#486065;padding:6px 0}.aside-card a:hover{color:var(--brand)}
.trust-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:15px}.trust-card{background:#fff;border:1px solid var(--line);border-radius:15px;padding:19px}.trust-card h3{margin:0 0 5px;font-size:17px}.trust-card p{margin:0;color:var(--muted);font-size:14px}.footer{background:#102729;color:#c8d8d8;padding:38px 0;margin-top:54px}.footergrid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:28px}.footer h4{color:#fff;margin:0 0 11px}.footer p,.footer a{font-size:13px;color:#b8cbcb}.footer a:hover{color:#fff}.footer-bottom{border-top:1px solid #284043;margin-top:24px;padding-top:18px;font-size:12px;color:#96aaaa;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}.toast{position:fixed;left:50%;bottom:24px;transform:translate(-50%,16px);background:#102729;color:#fff;padding:10px 14px;border-radius:10px;font-size:13px;opacity:0;pointer-events:none;transition:.18s;z-index:100}.toast.show{opacity:1;transform:translate(-50%,0)}.muted{color:var(--muted)}.good{color:var(--good)}.nowrap{white-space:nowrap}
@media(max-width:1000px){.hero-grid,.planner,.calcgrid,.article-wrap{grid-template-columns:1fr}.hero-card{max-width:720px}.resultsticky,.aside-card{position:static}.toolgrid{grid-template-columns:repeat(2,1fr)}.stats{grid-template-columns:repeat(2,1fr)}.flow{grid-template-columns:1fr}.flowstep:not(:last-child):after{content:'↓';right:auto;left:50%;top:auto;bottom:-13px}.navlinks{display:none}.menu-toggle{display:block}.navcta{display:none}.trust-grid{grid-template-columns:1fr}.footergrid{grid-template-columns:2fr 1fr 1fr}}
@media(max-width:680px){.wrap{width:min(100% - 22px,var(--max))}.topbar{text-align:center}.hero{padding:48px 0 36px}.hero h1{font-size:44px}.hero p{font-size:16px}.section{padding:38px 0}.section h2{font-size:30px}.toolgrid,.stats,.formgrid,.resultgrid,.snapshot{grid-template-columns:1fr}.panelhead,.panelbody{padding:18px}.calcpage{padding-top:24px}.calcintro h1{font-size:38px}.article{padding:20px}.footergrid{grid-template-columns:1fr}.toolbar{align-items:flex-start}.data-table{min-width:680px}.hero-card{padding:18px}}
@media print{.nav,.topbar,.footer,.heroactions,.actions,.seo-strip,.menu-toggle,.mobile-nav,.toast,.toolbar button{display:none!important}body{background:#fff}.panel,.article{box-shadow:none}.calcgrid{grid-template-columns:1fr 330px}.resultsticky{position:static}.wrap{width:100%;max-width:none;padding:0 18px}.calcpage{padding-top:10px}.content{page-break-before:auto}}