:root{
  --ink:#0c1f17;--paper:#f4faf6;--card:#ffffff;--line:#d6e6db;
  --leaf:#0f7d4f;--leaf-d:#0a5c39;--leaf-l:#1aa364;--lime:#9ee37d;
  --gold:#e0a93a;--mute:#5d6f66;--warn:#b4502a;--ok:#0f7d4f;
  --shadow:0 10px 30px rgba(12,31,23,.10);--r:14px;
}
*{box-sizing:border-box}
html,body{width:100%;overflow-x:hidden;margin:0;padding:0}
body{background:var(--paper);color:var(--ink);
  font-family:'Inter',system-ui,Segoe UI,Roboto,Arial,sans-serif;
  line-height:1.68;font-size:17px;-webkit-font-smoothing:antialiased}
.wrap{max-width:1060px;margin:0 auto;padding:0 22px}
img{max-width:100%;height:auto}
a{color:var(--leaf-d);text-decoration:none}
a:hover{text-decoration:underline}

/* header */
.topbar{position:sticky;top:0;z-index:60;background:rgba(255,255,255,.94);
  backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.topbar-in{display:flex;align-items:center;gap:16px;padding:13px 0}
.brandmark{display:inline-flex;align-items:center;gap:10px;font-weight:800;
  font-size:1.28rem;letter-spacing:-.01em;color:var(--ink);white-space:nowrap}
.brandmark .pip{width:26px;height:26px;border-radius:8px;display:inline-block;
  background:conic-gradient(from 210deg,var(--leaf-l),var(--leaf-d),var(--lime),var(--leaf-l))}
.brandmark b{color:var(--leaf-d)}
.nav-list{margin-left:auto;display:flex;align-items:center;gap:4px;flex-wrap:nowrap}
.nav-list a{color:var(--mute);font-size:.93rem;padding:9px 10px;border-radius:9px;
  white-space:nowrap;font-weight:600}
.nav-list a:hover{color:var(--ink);background:#eaf4ee;text-decoration:none}
.nav-list a.on{color:var(--leaf-d);background:#eaf4ee}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:7px;
  background:linear-gradient(135deg,var(--leaf-l),var(--leaf-d));color:#fff!important;
  font-weight:700;padding:12px 20px;border-radius:11px;white-space:nowrap;
  min-height:46px;border:none;cursor:pointer;box-shadow:0 6px 18px rgba(15,125,79,.28)}
.btn:hover{filter:brightness(1.07);text-decoration:none}
.btn.gold{background:linear-gradient(135deg,#f0c35c,var(--gold));color:#3a2a06!important;
  box-shadow:0 6px 18px rgba(224,169,58,.3)}
.btn.ghost{background:#eaf4ee;color:var(--leaf-d)!important;box-shadow:none}
.nav-toggle{display:none;margin-left:auto;width:48px;height:46px;border-radius:11px;
  border:1px solid var(--line);background:#fff;cursor:pointer;align-items:center;
  justify-content:center;flex-direction:column;gap:5px}
.nav-toggle span{width:22px;height:2px;background:var(--ink);border-radius:2px}

main{padding:8px 0 20px}
h1{font-size:2.05rem;line-height:1.18;margin:.25em 0 .4em;letter-spacing:-.015em}
h2{font-size:1.5rem;margin:1.6em 0 .5em;letter-spacing:-.01em}
h3{font-size:1.17rem;margin:1.3em 0 .4em}
p{margin:0 0 1.05em}
.crumbs{font-size:.84rem;color:var(--mute);padding:16px 0 4px}
.crumbs a{color:var(--mute)}
.crumbs span{color:var(--ink)}

.snippet{font-size:1.07rem;
  background:#eefcf3;border:1px solid var(--line);border-left:5px solid var(--leaf);
  padding:17px 20px;border-radius:12px;margin:0 0 1.5em}

.hero{display:grid;grid-template-columns:1.15fr .85fr;gap:28px;align-items:center;
  background:linear-gradient(135deg,#0a5c39,#0f7d4f 60%,#157a4e);color:#eafff3;
  border-radius:18px;padding:30px;margin:6px 0 8px;box-shadow:var(--shadow)}
.hero h1{color:#fff;margin-top:0}
.hero p{color:#d6f5e3}
.hero .hero-img img{border-radius:13px;box-shadow:0 14px 34px rgba(0,0,0,.3);width:100%}
.hero .badges{display:flex;flex-wrap:wrap;gap:8px;margin:14px 0 6px}
.tag{display:inline-block;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.25);
  color:#eafff3;font-size:.82rem;font-weight:600;padding:5px 11px;border-radius:999px}

figure{margin:1.6em 0;text-align:center}
figure img{width:100%;border-radius:13px;box-shadow:var(--shadow)}
figcaption{font-size:.84rem;color:var(--mute);margin-top:8px}

.snapshot{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:16px;
  background:var(--card);border:1px solid var(--line);border-radius:var(--r);
  padding:22px;margin:1.5em 0;box-shadow:var(--shadow)}
.snapshot .cell .k{font-size:.74rem;text-transform:uppercase;letter-spacing:.05em;
  color:var(--mute);font-weight:700}
.snapshot .cell .v{font-weight:700;margin-top:3px}
.snapshot .score{grid-column:span 1}
.snapshot .score .num{font-size:2.4rem;font-weight:800;color:var(--leaf-d);line-height:1}

.callout{background:var(--card);border:1px solid var(--line);border-radius:var(--r);
  padding:18px 20px;margin:1.4em 0;box-shadow:var(--shadow)}
.note{background:#fff7e9;border:1px solid #f0dcb0;border-radius:12px;
  padding:13px 17px;margin:1.3em 0;font-size:.94rem;color:#6a5320}

.split{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin:1.5em 0}
.split .panel{background:var(--card);border:1px solid var(--line);border-radius:var(--r);
  padding:18px 20px;box-shadow:var(--shadow)}
.split h3{margin-top:0}
.plus li,.minus li{list-style:none;position:relative;padding-left:1.7em;margin:.4em 0}
.plus li:before{content:"✓";position:absolute;left:0;color:var(--ok);font-weight:800}
.minus li:before{content:"!";position:absolute;left:.2em;color:var(--warn);font-weight:800}

.table-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch;margin:1.3em 0;
  border-radius:12px;border:1px solid var(--line)}
table{border-collapse:collapse;width:100%;min-width:480px;background:var(--card)}
th,td{padding:11px 14px;text-align:left;font-size:.95rem;border-bottom:1px solid var(--line)}
th{background:#eaf4ee;color:var(--leaf-d);font-weight:700}
tr:last-child td{border-bottom:none}

.steps{counter-reset:s;list-style:none;padding:0;margin:1.3em 0}
.steps li{counter-increment:s;position:relative;padding:14px 16px 14px 60px;
  background:var(--card);border:1px solid var(--line);border-radius:12px;margin:.55em 0;
  box-shadow:var(--shadow)}
.steps li:before{content:counter(s);position:absolute;left:16px;top:13px;width:30px;height:30px;
  border-radius:9px;background:linear-gradient(135deg,var(--leaf-l),var(--leaf-d));color:#fff;
  display:flex;align-items:center;justify-content:center;font-weight:800}

.cta{background:linear-gradient(135deg,#0a5c39,#0f7d4f);border-radius:18px;
  padding:28px;text-align:center;color:#eafff3;margin:1.8em 0;box-shadow:var(--shadow)}
.cta h3{color:#fff;margin-top:0}
.cta p{color:#d6f5e3}

.tabs{margin:1.4em 0}
.tabs .tabbar{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:12px}
.tabs .tabbar button{background:#eaf4ee;border:1px solid var(--line);color:var(--leaf-d);
  font-weight:700;padding:9px 15px;border-radius:10px;cursor:pointer;min-height:42px}
.tabs .tabbar button[aria-selected="true"]{background:var(--leaf-d);color:#fff;border-color:var(--leaf-d)}
.tabs .panelbox{background:var(--card);border:1px solid var(--line);border-radius:var(--r);
  padding:18px 20px;box-shadow:var(--shadow)}
.tabs .panelbox[hidden]{display:none}

.calc{background:var(--card);border:1px solid var(--line);border-radius:var(--r);
  padding:20px;margin:1.5em 0;box-shadow:var(--shadow)}
.calc .row{display:flex;flex-wrap:wrap;gap:16px;align-items:center;margin:.5em 0}
.calc label{font-weight:600;min-width:170px}
.calc input[type=range]{flex:1;min-width:160px;accent-color:var(--leaf-d)}
.calc output{font-weight:800;color:var(--leaf-d)}
.calc .result{margin-top:14px;padding:14px;border-radius:11px;background:#eaf4ee;
  font-size:1.05rem}
.calc .result b{color:var(--leaf-d)}

details.qa{background:var(--card);border:1px solid var(--line);border-radius:12px;
  margin:.5em 0;padding:0 18px;box-shadow:var(--shadow)}
details.qa summary{cursor:pointer;padding:15px 0;font-weight:700;list-style:none;min-height:46px}
details.qa summary::-webkit-details-marker{display:none}
details.qa summary:before{content:"+";color:var(--leaf-d);font-weight:800;margin-right:9px}
details.qa[open] summary:before{content:"–"}
details.qa .ans{margin:0 0 15px;color:var(--ink)}

.lightbox{position:fixed;inset:0;background:rgba(8,20,14,.86);display:flex;
  align-items:center;justify-content:center;padding:20px;z-index:90}
.lightbox[hidden]{display:none}
.lightbox img{max-width:96%;max-height:90vh;border-radius:12px}
.lightbox button{position:absolute;top:16px;right:18px;background:#fff;border:none;
  width:44px;height:44px;border-radius:50%;font-size:1.3rem;cursor:pointer}
figure img{cursor:zoom-in}

.totop{position:fixed;right:18px;bottom:18px;width:48px;height:48px;border-radius:50%;
  background:var(--leaf-d);color:#fff;border:none;font-size:1.3rem;cursor:pointer;
  box-shadow:var(--shadow);opacity:0;pointer-events:none;transition:opacity .25s;z-index:70}
.totop.show{opacity:1;pointer-events:auto}

.xlinks{display:flex;flex-wrap:wrap;gap:10px;margin:1.4em 0}
.xlinks a{background:#eaf4ee;border:1px solid var(--line);border-radius:999px;
  padding:8px 15px;font-weight:600;color:var(--leaf-d)}
.xlinks a:hover{text-decoration:none;background:#dcefe3}

footer.foot{background:#0a2018;color:#bfe3cf;margin-top:34px;padding:34px 0 18px;font-size:.93rem}
.footgrid{display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:26px}
footer.foot h4{margin:0 0 11px;color:#eafff3;font-size:1rem}
footer.foot a{color:#bfe3cf}
footer.foot ul{list-style:none;padding:0;margin:0}
footer.foot li{margin:.32em 0}
.rg-badge{display:inline-block;border:2px solid var(--gold);color:var(--gold);
  border-radius:8px;padding:3px 10px;font-weight:800;margin-bottom:9px}
.legal{border-top:1px solid #1c3a2c;margin-top:24px;padding-top:15px;color:#8fc4a5;font-size:.83rem}

@media(max-width:880px){
  body{font-size:16px}
  h1{font-size:1.62rem}h2{font-size:1.32rem}h3{font-size:1.1rem}
  .wrap{padding:0 16px}
  .nav-toggle{display:flex}
  .nav-list{display:none;position:absolute;left:0;right:0;top:100%;
    flex-direction:column;align-items:stretch;gap:0;background:#fff;
    border-bottom:1px solid var(--line);padding:8px 16px 16px;box-shadow:var(--shadow)}
  .nav-list.open{display:flex}
  .nav-list a{padding:14px 8px;border-bottom:1px solid var(--line)}
  .topbar-in{position:relative}
  .hero{grid-template-columns:1fr;padding:22px}
  .split{grid-template-columns:1fr}
}