/* ============ MF VOLT — wholesale power bank showcase ============ */
:root {
  --ink: #0b0f14;
  --ink-2: #121822;
  --paper: #f6f7f4;
  --card: #ffffff;
  --volt: #c6f53c;
  --volt-deep: #9dc71a;
  --muted: #5b6472;
  --line: #e3e6df;
  --chip: #eef1e6;
  --radius: 14px;
  --maxw: 1180px;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial,
    "Noto Sans", "Noto Sans Thai", "Noto Sans SC", sans-serif;
  color: var(--ink); background: var(--paper);
  line-height: 1.6; -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; }
.container { max-width: var(--maxw); margin: 0 auto; padding: 0 22px; }

/* ---------- header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(11, 15, 20, .92); backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(198, 245, 60, .18);
}
.nav { display: flex; align-items: center; gap: 20px; height: 64px; }
.brand {
  display: flex; align-items: center; gap: 10px; text-decoration: none;
  color: #fff; font-weight: 800; font-size: 19px; letter-spacing: .5px;
}
.brand .mark {
  width: 30px; height: 30px; border-radius: 8px;
  background: var(--volt); color: var(--ink);
  display: grid; place-items: center;
}
.brand small { display: block; font-size: 10px; font-weight: 500; color: #9aa3af; letter-spacing: 1.5px; }
.nav-links { display: flex; align-items: center; gap: 18px; margin-left: auto; }
.nav-links a { color: #cbd2dc; text-decoration: none; font-size: 14px; font-weight: 600; }
.nav-links a:hover { color: var(--volt); }
.nav-cta {
  background: var(--volt) !important; color: var(--ink) !important;
  padding: 8px 16px; border-radius: 999px; font-weight: 700 !important;
}
.nav-toggle { display: none; background: none; border: 0; color: #fff; cursor: pointer; }

/* language switcher */
details.lang-switch { position: relative; margin-left: 4px; }
details.lang-switch summary {
  list-style: none; cursor: pointer; display: flex; align-items: center; gap: 6px;
  color: #cbd2dc; font-size: 13px; font-weight: 700;
  border: 1px solid rgba(255,255,255,.25); border-radius: 999px; padding: 5px 10px;
}
details.lang-switch summary::-webkit-details-marker { display: none; }
details.lang-switch svg[viewBox="0 0 20 14"] { width: 18px; height: 13px; border-radius: 2px; }
details.lang-switch .caret { width: 9px; }
details.lang-switch .lang-menu {
  position: absolute; right: 0; top: calc(100% + 8px);
  background: #fff; border-radius: 10px; box-shadow: 0 12px 30px rgba(0,0,0,.25);
  overflow: hidden; min-width: 150px;
}
details.lang-switch .lang-menu a {
  display: flex; align-items: center; gap: 8px; padding: 9px 14px;
  font-size: 13px; color: var(--ink); text-decoration: none; font-weight: 600;
}
details.lang-switch .lang-menu a:hover { background: var(--chip); }
details.lang-switch .lang-menu a[aria-current="true"] { background: var(--chip); }

/* ---------- hero ---------- */
.hero { background: radial-gradient(1100px 500px at 78% -10%, #1c2713 0%, var(--ink) 55%); color: #fff; }
.hero-inner {
  display: grid; grid-template-columns: 1.05fr .95fr; gap: 44px; align-items: center;
  padding: 66px 22px 74px;
}
.eyebrow {
  display: inline-block; font-size: 12.5px; font-weight: 800; letter-spacing: 2px;
  text-transform: uppercase; color: var(--ink);
  background: var(--volt); border-radius: 999px; padding: 6px 14px; margin-bottom: 18px;
}
.hero h1 { font-size: clamp(34px, 4.6vw, 54px); line-height: 1.08; font-weight: 900; letter-spacing: -1px; }
.hero h1 em { font-style: normal; color: var(--volt); }
.lede { margin-top: 18px; font-size: 17px; color: #b9c1cc; max-width: 54ch; }
.hero-ctas { display: flex; gap: 14px; margin-top: 28px; flex-wrap: wrap; }
.btn {
  display: inline-block; text-decoration: none; font-weight: 800; font-size: 15.5px;
  padding: 13px 26px; border-radius: 12px; transition: transform .12s;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--volt); color: var(--ink); }
.btn-ghost { border: 1.5px solid rgba(255,255,255,.35); color: #fff; }
.btn-ghost:hover { border-color: var(--volt); color: var(--volt); }
.hero-note { margin-top: 16px; font-size: 13.5px; color: #8f99a6; }
.hero-figure {
  background: #fff; border-radius: 18px; padding: 14px;
  border: 1px solid rgba(198,245,60,.25);
  box-shadow: 0 24px 70px rgba(0,0,0,.45);
}
.hero-figure img { border-radius: 10px; aspect-ratio: 1; object-fit: cover; }
.hero-figure figcaption {
  margin-top: 10px; text-align: center; color: var(--muted); font-size: 12.5px; font-weight: 600;
}
/* stats strip */
.stats { background: var(--ink-2); border-top: 1px solid rgba(255,255,255,.06); }
.stats-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; padding: 26px 0;
}
.stat { text-align: center; }
.stat b { display: block; font-size: 30px; font-weight: 900; color: var(--volt); letter-spacing: -.5px; }
.stat span { font-size: 12.5px; color: #9aa3af; font-weight: 600; letter-spacing: .4px; }

/* ---------- sections ---------- */
section.block { padding: 66px 0 30px; }
.section-head { max-width: 760px; margin-bottom: 30px; }
.section-kicker {
  font-size: 12px; font-weight: 800; letter-spacing: 2.4px; text-transform: uppercase;
  color: var(--volt-deep);
}
.section-head h2 { font-size: clamp(26px, 3.4vw, 38px); font-weight: 900; letter-spacing: -.5px; margin-top: 6px; }
.section-head p { margin-top: 12px; color: var(--muted); font-size: 16px; }

/* product grid */
.grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.grid.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid.grid-2 { grid-template-columns: repeat(2, 1fr); }
.p-card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden; display: flex; flex-direction: column;
  transition: box-shadow .15s, transform .15s;
}
.p-card:hover { box-shadow: 0 14px 36px rgba(11,15,20,.12); transform: translateY(-3px); }
.p-card .img { position: relative; background: #fff; height: 400px; display: flex; align-items: center; justify-content: center; }
.p-card .img img { width: auto; height: 100%; max-width: 100%; object-fit: contain; }
.p-badge {
  position: absolute; top: 10px; left: 10px;
  background: var(--ink); color: var(--volt);
  font-size: 10.5px; font-weight: 800; letter-spacing: 1px;
  padding: 4px 9px; border-radius: 999px; text-transform: uppercase;
}
.p-body { padding: 14px 16px 16px; display: flex; flex-direction: column; gap: 9px; flex: 1; }
.p-name { font-size: 15.5px; font-weight: 800; letter-spacing: .1px; }
.p-desc { font-size: 13px; color: var(--muted); }
.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chip {
  font-size: 11.5px; font-weight: 700; color: #3d442f;
  background: var(--chip); border-radius: 6px; padding: 3px 8px;
  font-variant-numeric: tabular-nums;
}
.chip.hot { background: var(--ink); color: var(--volt); }
.p-foot { margin-top: auto; display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.dots { display: flex; gap: 5px; }
.dot { width: 13px; height: 13px; border-radius: 50%; border: 1px solid rgba(0,0,0,.15); }
.p-quote {
  font-size: 12.5px; font-weight: 800; text-decoration: none; color: var(--ink);
  background: var(--volt); padding: 6px 12px; border-radius: 999px; white-space: nowrap;
}
.p-quote:hover { background: var(--volt-deep); }

/* wide feature card (E/K series) */
.wide-card {
  display: grid; grid-template-columns: 300px 1fr; gap: 26px; align-items: center;
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px; margin-bottom: 20px;
}
.wide-card .img img { border-radius: 10px; background: #fff; border: 1px solid var(--line); }
.wide-card h3 { font-size: 22px; font-weight: 900; }
.wide-card .p-desc { font-size: 14px; margin-top: 8px; }
.wide-card .chips { margin-top: 14px; }

/* dark OEM band */
.band-dark { background: var(--ink); color: #fff; }
.band-dark .section-kicker { color: var(--volt); }
.band-dark .section-head h2 { color: #fff; }
.band-dark .section-head p { color: #9aa3af; }
.oem-grid { display: grid; grid-template-columns: 420px 1fr; gap: 40px; align-items: center; padding-bottom: 40px; }
.oem-grid .boxshot img { border-radius: 14px; border: 1px solid rgba(255,255,255,.14); }
.oem-list { list-style: none; display: grid; gap: 13px; margin-top: 20px; }
.oem-list li { display: flex; gap: 12px; align-items: flex-start; font-size: 15px; color: #c3cad4; }
.oem-list b { color: #fff; }
.tick {
  flex: 0 0 22px; height: 22px; margin-top: 2px; border-radius: 6px;
  background: var(--volt); color: var(--ink); display: grid; place-items: center;
  font-size: 13px; font-weight: 900;
}

/* compliance + process */
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.panel {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px;
}
.panel h3 { font-size: 19px; font-weight: 900; margin-bottom: 14px; }
.panel ul { list-style: none; display: grid; gap: 10px; }
.panel li { font-size: 14.5px; color: var(--muted); padding-left: 18px; position: relative; }
.panel li::before { content: "▸"; position: absolute; left: 0; color: var(--volt-deep); font-weight: 900; }
.panel li b { color: var(--ink); }
.steps { display: grid; grid-template-columns: repeat(6, 1fr); gap: 12px; margin-top: 26px; }
.step {
  background: var(--card); border: 1px solid var(--line); border-radius: 12px;
  padding: 16px 12px; text-align: center;
}
.step b { display: block; color: var(--volt-deep); font-size: 20px; font-weight: 900; }
.step span { font-size: 12.5px; font-weight: 700; }

/* CTA */
.cta { background: linear-gradient(120deg, var(--ink) 0%, #1a2410 100%); color: #fff; text-align: center; }
.cta-inner { padding: 70px 22px; }
.cta h2 { font-size: clamp(26px, 3.6vw, 40px); font-weight: 900; }
.cta h2 em { font-style: normal; color: var(--volt); }
.cta p { color: #9aa3af; margin: 14px auto 26px; max-width: 52ch; }

/* footer */
footer { background: var(--ink); color: #8f99a6; border-top: 1px solid rgba(255,255,255,.07); }
.foot { display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap; padding: 30px 0; font-size: 13px; }
.foot a { color: #c3cad4; text-decoration: none; }
.foot .fine { font-size: 11.5px; margin-top: 14px; color: #66707c; max-width: 900px; }

/* whatsapp float */
.wa-float {
  position: fixed; right: 20px; bottom: 20px; z-index: 60;
  width: 54px; height: 54px; border-radius: 50%;
  background: #25d366; color: #fff; display: grid; place-items: center;
  box-shadow: 0 10px 26px rgba(0,0,0,.3); text-decoration: none;
}
.wa-float:hover { transform: scale(1.06); }
.wa-float svg { width: 27px; height: 27px; fill: #fff; }

/* ---------- detail page ---------- */
.crumb { padding: 18px 0 0; font-size: 13px; color: var(--muted); }
.crumb a { color: var(--muted); text-decoration: none; font-weight: 600; }
.crumb a:hover { color: var(--volt-deep); }
.crumb b { color: var(--ink); font-weight: 700; }

.detail { padding: 18px 0 30px; }
.d-grid { display: grid; grid-template-columns: minmax(340px, 460px) 1fr; gap: 40px; align-items: start; }
.d-gallery .d-main {
  width: 100%; height: 460px; object-fit: contain; border-radius: var(--radius);
  border: 1px solid var(--line); background: #fff;
}
.d-thumbs { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; margin-top: 12px; }
.d-thumbs img {
  width: 100%; height: 96px; object-fit: contain; border-radius: 10px;
  border: 1px solid var(--line); background: #fff;
}
.d-info h1 { font-size: clamp(26px, 3vw, 36px); font-weight: 900; letter-spacing: -.5px; margin: 6px 0 12px; }
.d-info .d-desc { color: var(--muted); font-size: 16px; max-width: 60ch; }
.d-info .chips { margin: 18px 0; }
.d-ctas { display: flex; gap: 12px; flex-wrap: wrap; margin: 20px 0 12px; }
.btn-dark {
  border: 1.5px solid var(--ink); color: var(--ink);
  background: transparent; padding: 12px 24px;
}
.btn-dark:hover { background: var(--ink); color: var(--volt); }

.d-cols { display: grid; grid-template-columns: 1.25fr .95fr; gap: 20px; margin-top: 34px; }
.d-col { display: grid; gap: 20px; align-content: start; }
table.spec { width: 100%; border-collapse: collapse; font-size: 14px; }
table.spec th, table.spec td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
table.spec tr:nth-child(odd) { background: #fbfcf8; }
table.spec th { color: var(--muted); font-weight: 700; white-space: nowrap; width: 34%; }
table.spec td { font-weight: 600; color: var(--ink); font-variant-numeric: tabular-nums; }
ul.hl { list-style: none; display: grid; gap: 10px; }
ul.hl li { padding-left: 22px; position: relative; font-size: 14.5px; color: var(--muted); }
ul.hl li::before {
  content: "⚡"; position: absolute; left: 0; top: 0; font-size: 12px;
}
.bestfor { font-size: 14.5px; color: var(--muted); }
.oem-mini { font-size: 13.5px; color: var(--muted); }
.oem-mini b { color: var(--ink); }
.d-note { margin-top: 22px; font-size: 12px; color: #8a919c; max-width: 900px; }

/* card actions (details + quote) */
.p-actions { display: flex; gap: 8px; align-items: center; }
.p-more {
  font-size: 12.5px; font-weight: 800; text-decoration: none; color: var(--ink);
  border: 1.5px solid var(--line); padding: 6px 12px; border-radius: 999px; white-space: nowrap;
}
.p-more:hover { border-color: var(--volt-deep); color: var(--volt-deep); }

/* ---------- responsive ---------- */
@media (max-width: 1020px) {
  .grid { grid-template-columns: repeat(3, 1fr); }
  .steps { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 880px) {
  .hero-inner { grid-template-columns: 1fr; padding-top: 48px; }
  .oem-grid { grid-template-columns: 1fr; }
  .wide-card { grid-template-columns: 1fr; }
  .d-grid { grid-template-columns: 1fr; gap: 24px; }
  .d-cols { grid-template-columns: 1fr; }
  .two-col { grid-template-columns: 1fr; }
  .nav-links {
    display: none; position: absolute; top: 64px; left: 0; right: 0;
    background: var(--ink); flex-direction: column; align-items: flex-start;
    padding: 18px 22px; gap: 14px; border-bottom: 1px solid rgba(255,255,255,.1);
  }
  .nav-links.open { display: flex; }
  .nav-toggle { display: block; margin-left: auto; }
  details.lang-switch { margin-left: 0; }
}
@media (max-width: 660px) {
  .grid { grid-template-columns: repeat(2, 1fr); }
  .grid.grid-2 { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
}