/* ============================================================
   LiVolt Energy — Global Stylesheet
   Brand: Primary #1E88E5 · Accent #4CAF50
   ============================================================ */
:root {
  --blue: #1E88E5;
  --blue-dark: #1565C0;
  --blue-deep: #0D3B66;
  --green: #4CAF50;
  --green-dark: #388E3C;
  --ink: #1c2733;
  --ink-soft: #4a5a6a;
  --muted: #7b8a99;
  --bg: #ffffff;
  --bg-soft: #f4f8fc;
  --line: #e3ebf3;
  --shadow: 0 10px 30px rgba(13, 59, 102, 0.10);
  --radius: 14px;
  --maxw: 1200px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: "Segoe UI", "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--blue); text-decoration: none; }
a:hover { color: var(--blue-dark); }
ul { list-style: none; }

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

/* ---------- Header ---------- */
.topbar {
  background: var(--blue-deep);
  color: #cfe3f5;
  font-size: 13px;
}
.topbar .container {
  display: flex; justify-content: space-between; align-items: center;
  min-height: 36px; gap: 16px; flex-wrap: wrap;
}
.topbar a { color: #fff; }
.topbar .tb-right { display: flex; gap: 18px; align-items: center; }

.header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.header .container {
  display: flex; align-items: center; justify-content: space-between;
  height: 72px; gap: 20px;
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand img { width: 44px; height: 44px; }
.brand .brand-name {
  font-size: 21px; font-weight: 800; letter-spacing: 0.3px; color: var(--ink);
}
.brand .brand-name span { color: var(--blue); }
.brand .brand-sub {
  font-size: 11px; color: var(--muted); letter-spacing: 2.2px; text-transform: uppercase;
}

.nav { display: flex; align-items: center; gap: 4px; }
.nav a {
  display: block; padding: 8px 14px; border-radius: 8px;
  color: var(--ink); font-weight: 600; font-size: 15px;
}
.nav a:hover { background: var(--bg-soft); color: var(--blue); }
.nav a.active { color: var(--blue); background: #e8f2fc; }
.lang-switch {
  margin-left: 8px; padding: 6px 14px; border: 1.5px solid var(--blue);
  border-radius: 999px; font-weight: 700; font-size: 13px; color: var(--blue) !important;
}
.lang-switch:hover { background: var(--blue); color: #fff !important; }

.nav-toggle { display: none; background: none; border: 0; cursor: pointer; padding: 8px; }
.nav-toggle span { display: block; width: 24px; height: 3px; background: var(--ink); margin: 5px 0; border-radius: 2px; transition: 0.25s; }

/* ---------- Hero ---------- */
.hero {
  position: relative; color: #fff; overflow: hidden;
  background: linear-gradient(120deg, #0d3b66 0%, #1565c0 55%, #1e88e5 100%);
}
.hero-img-wrap { position: absolute; inset: 0; }
.hero-img-wrap img { width: 100%; height: 100%; object-fit: cover; opacity: 0.28; }
.hero::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(100deg, rgba(13,59,102,0.92) 8%, rgba(21,101,192,0.55) 60%, rgba(13,59,102,0.35));
}
.hero .container { position: relative; z-index: 2; padding-top: 110px; padding-bottom: 130px; }
.hero-kicker {
  display: inline-block; background: rgba(76, 175, 80, 0.18); border: 1px solid rgba(76,175,80,0.65);
  color: #b9e6bb; padding: 6px 16px; border-radius: 999px;
  font-size: 13px; font-weight: 700; letter-spacing: 1.4px; text-transform: uppercase; margin-bottom: 22px;
}
.hero h1 { font-size: clamp(32px, 4.6vw, 56px); line-height: 1.16; font-weight: 800; max-width: 820px; }
.hero h1 em { font-style: normal; color: #8fd694; }
.hero p.lead { margin-top: 20px; font-size: clamp(16px, 1.6vw, 20px); max-width: 640px; color: #dbeafd; }
.hero-actions { margin-top: 34px; display: flex; gap: 14px; flex-wrap: wrap; }
.hero-stats { display: flex; gap: 46px; margin-top: 56px; flex-wrap: wrap; }
.hero-stats .stat b { font-size: 34px; font-weight: 800; display: block; color: #fff; }
.hero-stats .stat b i { font-style: normal; color: #8fd694; }
.hero-stats .stat span { font-size: 14px; color: #bcd7ee; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 28px; border-radius: 10px; font-weight: 700; font-size: 15px;
  transition: 0.2s; border: 2px solid transparent; cursor: pointer;
}
.btn-primary { background: var(--green); color: #fff; }
.btn-primary:hover { background: var(--green-dark); color: #fff; transform: translateY(-2px); }
.btn-outline { border-color: rgba(255,255,255,0.75); color: #fff; }
.btn-outline:hover { background: #fff; color: var(--blue-deep); }
.btn-blue { background: var(--blue); color: #fff; }
.btn-blue:hover { background: var(--blue-dark); color: #fff; transform: translateY(-2px); }
.btn-ghost-blue { border-color: var(--blue); color: var(--blue); }
.btn-ghost-blue:hover { background: var(--blue); color: #fff; }

/* ---------- Sections ---------- */
section.section { padding: 84px 0; }
section.section.alt { background: var(--bg-soft); }
.sec-head { max-width: 760px; margin: 0 auto 52px; text-align: center; }
.sec-head .kicker {
  color: var(--green-dark); font-weight: 800; letter-spacing: 2.4px;
  text-transform: uppercase; font-size: 13px;
}
.sec-head h2 { font-size: clamp(26px, 3vw, 38px); font-weight: 800; margin-top: 10px; color: var(--ink); }
.sec-head p { margin-top: 14px; color: var(--ink-soft); font-size: 16.5px; }

/* ---------- 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: 0.25s; display: flex; flex-direction: column;
}
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow); border-color: #cfe0ef; }
.card .card-img { height: 220px; overflow: hidden; background: #fff; display: flex; align-items: center; justify-content: center; }
.card .card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s; }
.card:hover .card-img img { transform: scale(1.05); }
.card .card-img.contain img { object-fit: contain; padding: 18px; }
.card .card-body { padding: 22px 24px 26px; flex: 1; display: flex; flex-direction: column; }
.card h3 { font-size: 19px; font-weight: 800; color: var(--ink); }
.card .tag {
  display: inline-block; align-self: flex-start; margin-bottom: 10px;
  font-size: 12px; font-weight: 700; letter-spacing: 1px; text-transform: uppercase;
  padding: 3px 12px; border-radius: 999px; background: #e8f2fc; color: var(--blue-dark);
}
.card .tag.green { background: #e9f6ea; color: var(--green-dark); }
.card p { margin-top: 10px; color: var(--ink-soft); font-size: 14.5px; flex: 1; }
.card .specs { margin-top: 14px; border-top: 1px dashed var(--line); padding-top: 12px; }
.card .specs li { display: flex; justify-content: space-between; gap: 12px; font-size: 13.5px; padding: 3px 0; }
.card .specs li span { color: var(--muted); }
.card .specs li b { color: var(--ink); font-weight: 700; }
.card .more { margin-top: 16px; font-weight: 700; font-size: 14px; }

/* ---------- Feature list (about) ---------- */
.split { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 56px; align-items: center; }
.split .img-wrap { border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
.check-list li {
  display: flex; gap: 12px; padding: 9px 0; color: var(--ink-soft); font-size: 15.5px;
}
.check-list li::before {
  content: "✓"; flex: 0 0 24px; width: 24px; height: 24px; border-radius: 50%;
  background: #e9f6ea; color: var(--green-dark); font-weight: 800; font-size: 13px;
  display: inline-flex; align-items: center; justify-content: center; margin-top: 3px;
}

/* ---------- Value chips ---------- */
.chips { display: flex; gap: 14px; flex-wrap: wrap; }
.chip {
  flex: 1 1 220px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px 24px; text-align: center;
}
.chip .ico { font-size: 30px; }
.chip h4 { margin-top: 10px; font-size: 17px; color: var(--ink); }
.chip p { margin-top: 6px; font-size: 13.5px; color: var(--ink-soft); }

/* ---------- Comparison table ---------- */
.compare { width: 100%; border-collapse: collapse; background: #fff; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
.compare th, .compare td { padding: 15px 20px; text-align: left; font-size: 15px; border-bottom: 1px solid var(--line); }
.compare thead th { background: var(--blue-deep); color: #fff; font-size: 15px; }
.compare tbody tr:nth-child(even) { background: var(--bg-soft); }
.compare td.good { color: var(--green-dark); font-weight: 700; }
.compare td.bad { color: #b0574f; }
.compare td b { color: var(--ink); }

/* ---------- CTA band ---------- */
.cta-band { background: linear-gradient(115deg, var(--blue-deep), var(--blue-dark) 60%, var(--blue)); color: #fff; padding: 64px 0; }
.cta-band .container { display: flex; align-items: center; justify-content: space-between; gap: 30px; flex-wrap: wrap; }
.cta-band h2 { font-size: clamp(22px, 2.6vw, 32px); font-weight: 800; }
.cta-band p { color: #cfe3f5; margin-top: 8px; max-width: 560px; }

/* ---------- Page hero (inner pages) ---------- */
.page-hero { background: linear-gradient(115deg, #0d3b66, #1565c0 70%, #1e88e5); color: #fff; padding: 72px 0 64px; }
.page-hero h1 { font-size: clamp(28px, 3.6vw, 44px); font-weight: 800; }
.page-hero p { margin-top: 12px; color: #cfe3f5; max-width: 720px; font-size: 17px; }
.breadcrumb { margin-top: 18px; font-size: 13.5px; color: #9fc3e6; }
.breadcrumb a { color: #cfe3f5; }

/* ---------- News ---------- */
.news-card .card-img { height: 180px; }
.news-date { font-size: 13px; color: var(--muted); margin-top: 10px; display: flex; gap: 14px; }

/* ---------- Contact ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: start; }
.info-card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 28px;
}
.info-item { display: flex; gap: 16px; padding: 14px 0; border-bottom: 1px dashed var(--line); }
.info-item:last-child { border-bottom: 0; }
.info-item .ico {
  flex: 0 0 44px; width: 44px; height: 44px; border-radius: 12px; background: #e8f2fc;
  display: flex; align-items: center; justify-content: center; font-size: 20px;
}
.info-item h4 { font-size: 15px; color: var(--ink); }
.info-item p { font-size: 14.5px; color: var(--ink-soft); margin-top: 2px; }
.form-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 30px; box-shadow: var(--shadow); }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-grid .full { grid-column: 1 / -1; }
label { font-size: 13.5px; font-weight: 700; color: var(--ink); display: block; margin-bottom: 6px; }
input, select, textarea {
  width: 100%; padding: 12px 14px; border: 1.5px solid var(--line); border-radius: 9px;
  font-size: 14.5px; font-family: inherit; color: var(--ink); background: var(--bg-soft);
}
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--blue); background: #fff; }
.form-note { font-size: 12.5px; color: var(--muted); margin-top: 10px; }

/* ---------- Footer ---------- */
.footer { background: #0a2439; color: #a8bfd3; padding: 64px 0 0; font-size: 14.5px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 40px; padding-bottom: 44px; }
.footer h4 { color: #fff; font-size: 16px; margin-bottom: 18px; }
.footer .brand .brand-name { color: #fff; }
.footer .brand .brand-sub { color: #7fa1bf; }
.footer p { margin-top: 14px; line-height: 1.8; }
.footer ul li { padding: 5px 0; }
.footer ul a { color: #a8bfd3; }
.footer ul a:hover { color: #fff; }
.footer .contact-line { display: flex; gap: 10px; padding: 6px 0; align-items: flex-start; }
.footer .contact-line .ico { flex: 0 0 18px; text-align: center; }
.footer a.mail { color: #cfe3f5; word-break: break-all; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.08); padding: 20px 0; font-size: 13px; color: #7fa1bf; }
.footer-bottom .container { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; }

/* ---------- Reveal animation ---------- */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.in { opacity: 1; transform: none; }

/* ---------- Responsive ---------- */
@media (max-width: 980px) {
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .split { grid-template-columns: 1fr; gap: 32px; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 760px) {
  .nav {
    display: none; position: absolute; top: 72px; left: 0; right: 0;
    background: #fff; border-bottom: 1px solid var(--line);
    flex-direction: column; align-items: stretch; padding: 12px 20px 18px; gap: 2px;
    box-shadow: var(--shadow);
  }
  .nav.open { display: flex; }
  .nav-toggle { display: block; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .form-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .hero .container { padding-top: 80px; padding-bottom: 90px; }
  .hero-stats { gap: 28px; }
}