/* ==========================================================================
   XGreen Solar — xgreensolar.com
   Self-contained stylesheet (no external CDN, no web fonts)
   ========================================================================== */

:root {
  --green: #12a150;
  --green-dark: #0a6b3f;
  --green-soft: #e8f7ee;
  --navy: #0d1f2d;
  --ink: #1b2733;
  --muted: #5b6b7a;
  --line: #e2e9ee;
  --bg: #f6f9fb;
  --white: #ffffff;
  --radius: 12px;
  --shadow: 0 10px 30px rgba(13, 31, 45, .08);
  --maxw: 1200px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Arial,
    "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background: var(--white);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: var(--green-dark); text-decoration: none; }
a:hover { text-decoration: none; opacity: .9; }

h1, h2, h3, h4 { line-height: 1.25; margin: 0 0 .6em; color: var(--navy); font-weight: 700; }
h1 { font-size: clamp(30px, 4.2vw, 48px); }
h2 { font-size: clamp(24px, 3vw, 34px); }
h3 { font-size: 20px; }
p { margin: 0 0 1em; }
ul { margin: 0 0 1em; padding-left: 20px; }
li { margin-bottom: .35em; }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }
.section { padding: 72px 0; }
.section--gray { background: var(--bg); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.section-head { max-width: 760px; margin: 0 auto 44px; text-align: center; }
.section-head p { color: var(--muted); margin: 0; }
.eyebrow {
  display: inline-block; font-size: 13px; letter-spacing: .14em; text-transform: uppercase;
  color: var(--green-dark); font-weight: 700; margin-bottom: 10px;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-block; padding: 13px 26px; border-radius: 8px; font-weight: 600;
  font-size: 15px; border: 1px solid transparent; cursor: pointer; transition: .18s;
  line-height: 1.2;
}
.btn--primary { background: var(--green); color: #fff; }
.btn--primary:hover { background: var(--green-dark); opacity: 1; }
.btn--ghost { border-color: rgba(255,255,255,.7); color: #fff; }
.btn--ghost:hover { background: rgba(255,255,255,.14); opacity: 1; }
.btn--outline { border-color: var(--green); color: var(--green-dark); background: #fff; }
.btn--outline:hover { background: var(--green-soft); opacity: 1; }

/* ---------- Header ---------- */
.topbar { background: var(--navy); color: #cfdae3; font-size: 13.5px; }
.topbar .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 40px; flex-wrap: wrap; }
.topbar a { color: #cfdae3; }
.topbar .topbar-items { display: flex; gap: 22px; flex-wrap: wrap; }
.topbar strong { color: #fff; font-weight: 600; }

.header { position: sticky; top: 0; z-index: 50; background: #fff; border-bottom: 1px solid var(--line); }
.header .wrap { display: flex; align-items: center; justify-content: space-between; gap: 20px; min-height: 74px; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: 800; color: var(--navy); font-size: 20px; letter-spacing: -.01em; }
.logo .mark {
  width: 36px; height: 36px; border-radius: 9px; display: grid; place-items: center;
  background: linear-gradient(135deg, var(--green) 0%, #2dc06b 100%); color: #fff; font-size: 17px; font-weight: 800;
}
.logo small { display: block; font-size: 11px; font-weight: 500; color: var(--muted); letter-spacing: .04em; }

.nav { display: flex; align-items: center; gap: 26px; }
.nav a { color: var(--ink); font-size: 15px; font-weight: 500; }
.nav a:hover { color: var(--green-dark); opacity: 1; }
.nav a.active { color: var(--green-dark); font-weight: 700; }
.nav-cta { display: flex; align-items: center; gap: 12px; }
.nav-toggle {
  display: none; width: 42px; height: 42px; border: 1px solid var(--line); border-radius: 8px;
  background: #fff; cursor: pointer; padding: 10px;
}
.nav-toggle span { display: block; height: 2px; background: var(--navy); margin: 4px 0; border-radius: 2px; }

/* ---------- Hero ---------- */
.hero { position: relative; color: #fff; overflow: hidden; background: var(--navy); }
.hero img.hero-bg { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: .55; }
.hero::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(100deg, rgba(6,24,36,.92) 0%, rgba(6,24,36,.72) 45%, rgba(6,24,36,.28) 100%);
}
.hero .wrap { position: relative; z-index: 2; padding: 96px 20px 100px; }
.hero-inner { max-width: 720px; }
.hero h1 { color: #fff; margin-bottom: 18px; }
.hero p.lead { font-size: 18px; color: #d6e2ea; margin-bottom: 26px; }
.hero .actions { display: flex; gap: 14px; flex-wrap: wrap; }
.hero .badges { display: flex; gap: 26px; margin-top: 40px; flex-wrap: wrap; }
.hero .badges div { font-size: 14px; color: #b9cad6; }
.hero .badges b { display: block; font-size: 22px; color: #fff; font-weight: 700; }

/* ---------- Page banner (inner pages) ---------- */
.pagehead { background: var(--navy); color: #fff; padding: 56px 0; position: relative; }
.pagehead::after {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(900px 300px at 15% 0%, rgba(18,161,80,.35), transparent 70%);
}
.pagehead .wrap { position: relative; z-index: 2; }
.pagehead h1 { color: #fff; margin-bottom: 6px; }
.pagehead p { color: #c2d2dd; margin: 0; }
.crumbs { font-size: 13.5px; color: #9fb3c1; margin-bottom: 10px; }
.crumbs a { color: #9fb3c1; }

/* ---------- Cards / grids ---------- */
.grid { display: grid; gap: 26px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden; transition: .2s; height: 100%; display: flex; flex-direction: column;
}
.card:hover { box-shadow: var(--shadow); transform: translateY(-3px); }
.card .thumb { aspect-ratio: 4 / 3; overflow: hidden; background: #eef2f5; }
.card .thumb img { width: 100%; height: 100%; object-fit: cover; }
.card .body { padding: 22px; flex: 1; display: flex; flex-direction: column; }
.card .body h3 { margin-bottom: 8px; }
.card .body p { color: var(--muted); font-size: 15px; }
.card .body ul { color: var(--muted); font-size: 14.5px; }
.card .more { margin-top: auto; font-weight: 600; font-size: 15px; color: var(--green-dark); }

.feature { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; }
.feature .ico {
  width: 44px; height: 44px; border-radius: 10px; background: var(--green-soft); color: var(--green-dark);
  display: grid; place-items: center; font-weight: 800; margin-bottom: 14px;
}
.feature h3 { font-size: 17px; margin-bottom: 6px; }
.feature p { color: var(--muted); font-size: 14.5px; margin: 0; }

/* ---------- Split section ---------- */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.split img { border-radius: var(--radius); width: 100%; }
.split.flip .txt { order: 2; }

/* ---------- Tables ---------- */
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; }
table { width: 100%; border-collapse: collapse; font-size: 15px; min-width: 640px; }
th, td { padding: 13px 16px; text-align: left; border-bottom: 1px solid var(--line); }
th { background: #f2f7fa; color: var(--navy); font-weight: 700; font-size: 14px; }
tr:last-child td { border-bottom: none; }
tbody tr:hover { background: #fafcfe; }

/* ---------- Product detail block ---------- */
.pblock { display: grid; grid-template-columns: 1fr 1fr; gap: 44px; align-items: start; padding: 64px 0; border-bottom: 1px solid var(--line); }
.pblock:last-child { border-bottom: none; }
.pblock:nth-child(even) .pmedia { order: 2; }
.pblock img { border-radius: var(--radius); border: 1px solid var(--line); }
.pblock h2 { margin-bottom: 10px; }
.pblock .lead { color: var(--muted); }
.speclist { list-style: none; padding: 0; margin: 0 0 18px; }
.speclist li { padding: 8px 0 8px 26px; position: relative; border-bottom: 1px dashed var(--line); font-size: 15px; }
.speclist li::before {
  content: "✓"; position: absolute; left: 0; top: 7px; color: var(--green); font-weight: 800;
}

/* ---------- Process steps ---------- */
.steps { counter-reset: s; display: grid; gap: 20px; grid-template-columns: repeat(5, 1fr); }
.step { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 22px 18px; position: relative; }
.step::before {
  counter-increment: s; content: counter(s, decimal-leading-zero);
  font-weight: 800; color: var(--green); font-size: 14px; letter-spacing: .08em;
}
.step h4 { margin: 8px 0 6px; font-size: 16px; }
.step p { margin: 0; font-size: 14px; color: var(--muted); }

/* ---------- CTA band ---------- */
.cta { background: linear-gradient(120deg, var(--green-dark) 0%, var(--green) 100%); color: #fff; border-radius: var(--radius); padding: 46px; display: flex; align-items: center; justify-content: space-between; gap: 28px; flex-wrap: wrap; }
.cta h2 { color: #fff; margin-bottom: 6px; }
.cta p { margin: 0; color: #dff5e8; }
.cta .btn { background: #fff; color: var(--green-dark); }

/* ---------- Contact ---------- */
.contact-grid { display: grid; grid-template-columns: 1.05fr 1fr; gap: 44px; }
.info-list { list-style: none; padding: 0; }
.info-list li { display: flex; gap: 14px; padding: 16px 0; border-bottom: 1px solid var(--line); }
.info-list .k { min-width: 108px; color: var(--muted); font-size: 14px; }
.info-list .v { font-weight: 600; }
form .field { margin-bottom: 16px; }
form label { display: block; font-size: 14px; font-weight: 600; margin-bottom: 6px; }
form input, form select, form textarea {
  width: 100%; padding: 12px 14px; border: 1px solid var(--line); border-radius: 8px;
  font: inherit; font-size: 15px; color: var(--ink); background: #fff;
}
form input:focus, form select:focus, form textarea:focus { outline: 2px solid var(--green-soft); border-color: var(--green); }
form textarea { min-height: 130px; resize: vertical; }
.form-note { font-size: 13px; color: var(--muted); }

/* ---------- Notice ---------- */
.notice {
  background: #fff8e6; border: 1px solid #f2dfa8; border-left: 4px solid #e0a800;
  border-radius: 8px; padding: 16px 18px; font-size: 14.5px; color: #6b5312;
}
.notice strong { color: #4a3908; }

/* ---------- Footer ---------- */
.footer { background: var(--navy); color: #a9bcc9; padding: 56px 0 24px; font-size: 14.5px; margin-top: 0; }
.footer h4 { color: #fff; font-size: 15px; letter-spacing: .04em; margin-bottom: 14px; }
.footer a { color: #a9bcc9; }
.footer a:hover { color: #fff; opacity: 1; }
.footer ul { list-style: none; padding: 0; }
.footer .fgrid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 34px; }
.footer .brandline { display: flex; align-items: center; gap: 10px; color: #fff; font-weight: 800; font-size: 19px; margin-bottom: 12px; }
.footer .bottom { border-top: 1px solid rgba(255,255,255,.1); margin-top: 38px; padding-top: 20px; font-size: 13px; color: #8ba1b0; display: flex; justify-content: space-between; gap: 14px; flex-wrap: wrap; }

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(3, 1fr); }
  .footer .fgrid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 860px) {
  .nav-toggle { display: block; }
  .nav {
    display: none; position: absolute; left: 0; right: 0; top: 100%;
    background: #fff; border-bottom: 1px solid var(--line);
    flex-direction: column; align-items: stretch; gap: 0; padding: 8px 20px 18px;
  }
  .nav.open { display: flex; }
  .nav a { padding: 12px 0; border-bottom: 1px solid var(--line); }
  .nav-cta .btn { display: none; }
  .header .wrap { position: relative; min-height: 64px; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr 1fr; }
  .split, .pblock, .contact-grid { grid-template-columns: 1fr; gap: 28px; }
  .pblock:nth-child(even) .pmedia { order: 0; }
  .split.flip .txt { order: 0; }
  .section { padding: 52px 0; }
  .hero .wrap { padding: 68px 20px 72px; }
  .cta { padding: 32px 24px; }
  .footer .fgrid { grid-template-columns: 1fr; gap: 26px; }
}

@media (max-width: 520px) {
  .steps { grid-template-columns: 1fr; }
  .hero .badges { gap: 18px; }
}