/* iGreen SOLAR — trang "Tìm hiểu thêm" */
:root{
  --forest:#063D2E; --emerald:#059669; --deep:#047857; --leaf:#10B981;
  --gold:#F5B301; --amber:#F59E0B;
  --mint:#ECFAF3; --mint2:#F5FCF8; --line:#DCEDE4;
  --ink:#0B2A21; --text:#4A5D55; --muted:#6B7F77;
  --radius:20px; --shadow:0 10px 30px rgba(6,61,46,.07);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:"Be Vietnam Pro",system-ui,-apple-system,"Segoe UI",sans-serif;color:var(--text);
  background:linear-gradient(180deg,#F1FBF6 0,#FFFFFF 520px);line-height:1.7;font-size:17px}
img{max-width:100%;display:block}
a{color:var(--emerald);text-decoration:none}
a:hover{text-decoration:underline}

/* top bar */
.topbar{position:sticky;top:0;z-index:10;background:rgba(255,255,255,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.topbar .in{max-width:1120px;margin:0 auto;padding:12px 20px;display:flex;align-items:center;justify-content:space-between;gap:12px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;color:var(--forest);font-size:18px}
.brand b{color:var(--emerald)}
.brand img{width:34px;height:34px;object-fit:contain}
.back{font-weight:600;font-size:15px;color:var(--deep);display:inline-flex;align-items:center;gap:6px}
.topbar .call{background:var(--emerald);color:#fff;font-weight:700;font-size:15px;padding:9px 16px;border-radius:999px;white-space:nowrap}
.topbar .call:hover{text-decoration:none;background:var(--deep)}

/* hero */
.hero{max-width:1120px;margin:0 auto;padding:44px 20px 10px;display:grid;grid-template-columns:1.1fr .9fr;gap:40px;align-items:center}
.crumb{font-size:14px;color:var(--muted);margin-bottom:14px}
.crumb a{color:var(--muted)}
.hero .ic{width:56px;height:56px;border-radius:16px;background:#E3F5EC;color:var(--emerald);display:flex;align-items:center;justify-content:center;margin-bottom:18px}
.hero .ic svg{width:28px;height:28px}
.hero h1{font-size:42px;line-height:1.15;color:var(--forest);font-weight:800;letter-spacing:-.02em}
.hero .lead{font-size:19px;margin-top:16px;color:var(--text)}
.meta{display:flex;flex-wrap:wrap;gap:8px 18px;margin-top:18px;font-size:14px;color:var(--muted)}
.meta span{display:inline-flex;align-items:center;gap:6px}
.hero figure{border-radius:24px;overflow:hidden;box-shadow:var(--shadow);background:#DCEDE4}
.hero figure img{width:100%;height:360px;object-fit:cover}
.hero figcaption{font-size:13px;color:var(--muted);background:#fff;padding:9px 14px}

/* layout */
.wrap{max-width:1120px;margin:0 auto;padding:20px 20px 60px;display:grid;grid-template-columns:260px 1fr;gap:44px;align-items:start}
.toc{position:sticky;top:84px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:20px;font-size:15px}
.toc h4{font-size:13px;letter-spacing:.12em;text-transform:uppercase;color:var(--emerald);margin-bottom:10px}
.toc ol{list-style:none;counter-reset:t}
.toc li{counter-increment:t;margin:7px 0}
.toc li a{color:var(--text);display:flex;gap:8px}
.toc li a::before{content:counter(t,decimal-leading-zero);color:var(--gold);font-weight:800}
article{min-width:0}

/* summary */
.summary{background:#fff;border:1px solid var(--line);border-left:6px solid var(--emerald);border-radius:var(--radius);padding:24px 26px;box-shadow:var(--shadow)}
.summary h2{font-size:20px;color:var(--forest);margin-bottom:10px}
.summary ul{list-style:none}
.summary li{position:relative;padding-left:30px;margin:9px 0}
.summary li::before{content:"";position:absolute;left:0;top:7px;width:18px;height:18px;border-radius:50%;
  background:var(--emerald) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='3.2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M20 6 9 17l-5-5'/%3E%3C/svg%3E") center/12px no-repeat}
.summary li b{color:var(--forest)}

/* sections */
section.s{margin-top:46px;scroll-margin-top:90px}
section.s h2{font-size:28px;line-height:1.25;color:var(--forest);font-weight:800;letter-spacing:-.01em}
section.s h2 .n{color:var(--gold);margin-right:8px}
section.s h3{font-size:19px;color:var(--forest);margin:22px 0 6px}
section.s p{margin-top:12px}
section.s p b, section.s li b{color:var(--forest)}
section.s ul.dot{margin:12px 0 0 0;list-style:none}
section.s ul.dot li{position:relative;padding-left:22px;margin:8px 0}
section.s ul.dot li::before{content:"";position:absolute;left:4px;top:11px;width:8px;height:8px;border-radius:50%;background:var(--emerald)}

/* cards */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:18px}
.cards.two{grid-template-columns:repeat(2,1fr)}
.card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:20px;box-shadow:var(--shadow)}
.card .ci{width:44px;height:44px;border-radius:12px;background:#E3F5EC;color:var(--emerald);display:flex;align-items:center;justify-content:center;margin-bottom:12px;font-size:22px;font-weight:800}
.card .ci svg{width:22px;height:22px}
.card h4{font-size:17px;color:var(--forest);line-height:1.35}
.card p{font-size:15px;margin-top:6px !important;line-height:1.6}
.card.hl{background:linear-gradient(150deg,#05463A,#0A7A55);border:none;color:#E8F7EF}
.card.hl h4{color:#fff} .card.hl .ci{background:rgba(255,255,255,.14);color:var(--gold)}

/* figures, diagrams */
figure.fig{margin-top:20px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
figure.fig img{width:100%;max-height:460px;aspect-ratio:16/10;object-fit:cover;background:#DCEDE4}
figure.fig .svgbox{padding:18px 16px 6px}
figure.fig svg{width:100%;height:auto;display:block}
figure.fig figcaption{font-size:14px;color:var(--muted);padding:10px 16px 14px;border-top:1px solid var(--line)}
.pair{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:20px}
.pair figure.fig{margin-top:0}
.pair figure.fig img{height:300px}

/* stat strip */
.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:18px}
.stat{background:var(--mint);border:1px solid var(--line);border-radius:16px;padding:16px 18px}
.stat .v{font-size:26px;font-weight:800;color:var(--forest);line-height:1.15}
.stat .v small{font-size:15px;font-weight:700}
.stat .l{font-size:14px;color:var(--text);margin-top:4px;line-height:1.45}

/* tables */
.tbl{margin-top:18px;overflow-x:auto;border:1px solid var(--line);border-radius:16px;background:#fff}
.tbl table{width:100%;border-collapse:collapse;font-size:15px;min-width:560px}
.tbl th{background:var(--mint);color:var(--forest);text-align:left;padding:12px 14px;font-weight:700;border-bottom:1px solid var(--line);vertical-align:bottom}
.tbl td{padding:12px 14px;border-bottom:1px solid var(--line);vertical-align:top;line-height:1.55}
.tbl tr:last-child td{border-bottom:none}
.tbl td b{color:var(--forest)}
.tbl.rh td:first-child{font-weight:700;color:var(--forest);min-width:110px}

/* notes */
.note{margin-top:18px;background:#FFF8E6;border:1px solid #F6DFA0;border-radius:16px;padding:14px 18px;font-size:15px;color:#6B5310}
.note b{color:#5A4407}
.tip{margin-top:18px;background:var(--mint);border:1px solid var(--line);border-radius:16px;padding:14px 18px;font-size:15px}

/* steps */
.steps{list-style:none;margin-top:16px;counter-reset:st}
.steps li{counter-increment:st;position:relative;padding:4px 0 16px 58px;border-left:2px dashed var(--line);margin-left:20px}
.steps li:last-child{border-left-color:transparent}
.steps li::before{content:counter(st);position:absolute;left:-21px;top:0;width:40px;height:40px;border-radius:50%;background:var(--emerald);color:#fff;font-weight:800;display:flex;align-items:center;justify-content:center}
.steps li b{display:block;color:var(--forest);font-size:17px}

/* legal */
.legal{list-style:none;margin-top:14px}
.legal li{background:#fff;border:1px solid var(--line);border-radius:14px;padding:13px 16px;margin:10px 0;font-size:15px;line-height:1.55}
.legal li a{font-weight:700}
.legal li span{display:block;color:var(--muted);font-size:14px;margin-top:2px}

/* faq */
details{background:#fff;border:1px solid var(--line);border-radius:14px;padding:4px 18px;margin-top:10px}
summary{cursor:pointer;font-weight:700;color:var(--forest);padding:12px 0;list-style:none;display:flex;justify-content:space-between;gap:12px}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";color:var(--emerald);font-size:22px;line-height:1}
details[open] summary::after{content:"–"}
details p{margin:0 0 14px !important;font-size:16px}

/* cta */
.cta{margin-top:50px;background:linear-gradient(150deg,#05463A,#0A7A55);color:#E8F7EF;border-radius:24px;padding:32px;display:grid;grid-template-columns:1.4fr 1fr;gap:20px;align-items:center}
.cta h2{color:#fff;font-size:26px;line-height:1.25}
.cta p{margin-top:8px}
.cta .btns{display:flex;flex-direction:column;gap:10px}
.cta a.b1{background:var(--gold);color:var(--forest);font-weight:800;padding:13px 18px;border-radius:999px;text-align:center}
.cta a.b2{border:1.5px solid rgba(255,255,255,.5);color:#fff;font-weight:700;padding:12px 18px;border-radius:999px;text-align:center}
.cta a:hover{text-decoration:none;filter:brightness(1.05)}

/* related */
.related{max-width:1120px;margin:0 auto;padding:0 20px 50px}
.related h3{font-size:22px;color:var(--forest);margin-bottom:14px}
.related .grid{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}
.related a{background:#fff;border:1px solid var(--line);border-radius:16px;padding:16px;font-weight:700;color:var(--forest);font-size:15px;line-height:1.4;box-shadow:var(--shadow)}
.related a span{display:block;color:var(--emerald);font-size:14px;margin-top:6px;font-weight:600}
.related a:hover{text-decoration:none;border-color:var(--emerald)}

footer.ft{border-top:1px solid var(--line);background:#fff}
footer.ft .in{max-width:1120px;margin:0 auto;padding:22px 20px;font-size:14px;color:var(--muted);display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px}
.credit{font-size:13px;color:var(--muted);margin-top:10px}

@media (max-width:980px){
  .hero{grid-template-columns:1fr;padding-top:28px}
  .hero figure img{height:260px}
  .wrap{grid-template-columns:1fr}
  .toc{display:none}
  .related .grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:640px){
  body{font-size:16px}
  .hero h1{font-size:31px}
  .hero .lead{font-size:17px}
  section.s h2{font-size:23px}
  .cards,.cards.two,.stats,.pair{grid-template-columns:1fr}
  .pair figure.fig img{height:240px}
  .cta{grid-template-columns:1fr;padding:24px}
  .topbar .call{display:none}
  .related .grid{grid-template-columns:1fr}
  figure.fig .svgbox{overflow-x:auto}
  figure.fig .svgbox svg{min-width:640px}
}