:root {
  --ink: #111827;
  --muted: #667085;
  --line: #dde3ec;
  --paper: #ffffff;
  --bg: #f4f6f9;
  --brand: #d6aa16;
  --brand-dark: #111827;
  --blue: #1763d1;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--bg);
  font-family: Arial, "PingFang SC", "Noto Sans Thai", sans-serif;
}

a { color: inherit; text-decoration: none; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px clamp(18px, 5vw, 72px);
  background: rgba(255,255,255,.9);
  border-bottom: 1px solid rgba(17,24,39,.08);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.brand-mark {
  width: 46px;
  height: 46px;
  border-radius: 8px;
  display: grid;
  place-items: center;
  background: var(--brand);
  color: #111827;
  font-weight: 900;
  letter-spacing: 0;
}

.brand strong,
.brand small {
  display: block;
}

.brand small {
  margin-top: 3px;
  color: var(--muted);
  font-size: 12px;
}

nav {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 700;
}

nav a {
  padding: 9px 12px;
  border-radius: 7px;
  color: #344054;
}

nav a:hover { background: #eef2f7; }

.nav-cta {
  background: var(--brand-dark);
  color: #fff;
}

nav .nav-cta:hover { background: #263244; }

.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #fff;
}

.lang-btn {
  min-height: 30px;
  padding: 5px 10px;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
  font: inherit;
  font-size: 12px;
  font-weight: 900;
  line-height: 1;
  cursor: pointer;
}

.lang-btn.active {
  background: var(--brand-dark);
  color: #fff;
}

.hero {
  min-height: 680px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(420px, 560px);
  align-items: center;
  gap: clamp(28px, 6vw, 86px);
  padding: 56px clamp(18px, 5vw, 72px) 72px;
  background:
    linear-gradient(90deg, rgba(17,24,39,.92), rgba(17,24,39,.72)),
    url("/static/photo_examples/front_left.jpg") center / cover no-repeat;
  color: #fff;
}

.hero-copy {
  max-width: 720px;
  display: grid;
  gap: 22px;
}

.eyebrow {
  margin: 0;
  color: var(--brand);
  font-weight: 900;
  font-size: 13px;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1, h2, h3, p { margin: 0; }

h1 {
  font-size: clamp(48px, 8vw, 92px);
  line-height: .96;
  letter-spacing: 0;
}

.lead {
  max-width: 620px;
  font-size: clamp(18px, 2.2vw, 25px);
  line-height: 1.55;
  color: rgba(255,255,255,.86);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 12px 18px;
  border-radius: 7px;
  font-weight: 900;
}

.button.primary {
  background: var(--brand);
  color: #111827;
}

.button.secondary {
  border: 1px solid rgba(255,255,255,.28);
  color: #fff;
  background: rgba(255,255,255,.08);
}

.product-shot {
  min-height: 390px;
  display: grid;
  grid-template-columns: 92px 1fr;
  gap: 0;
  border: 1px solid rgba(255,255,255,.2);
  border-radius: 8px;
  overflow: hidden;
  background: #fff;
  box-shadow: 0 34px 90px rgba(0,0,0,.34);
}

.mock-sidebar {
  display: grid;
  align-content: start;
  gap: 12px;
  padding: 22px 16px;
  background: #121826;
}

.mock-sidebar span {
  height: 34px;
  border-radius: 7px;
  background: rgba(255,255,255,.12);
}

.mock-sidebar span:first-child {
  height: 52px;
  background: var(--brand);
}

.mock-main {
  padding: 22px;
  background: #f8fafc;
}

.mock-top {
  height: 56px;
  border-radius: 8px;
  background: #fff;
  border: 1px solid var(--line);
  margin-bottom: 16px;
}

.mock-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.mock-grid article {
  min-height: 92px;
  display: grid;
  align-content: center;
  gap: 8px;
  padding: 16px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--ink);
}

.mock-grid b {
  color: var(--muted);
  font-size: 12px;
}

.mock-grid strong {
  font-size: 25px;
}

.mock-table {
  display: grid;
  gap: 10px;
  margin-top: 16px;
  padding: 16px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.mock-table i {
  height: 18px;
  border-radius: 4px;
  background: linear-gradient(90deg, #d9e2ef, #eef2f7);
}

.section {
  padding: 72px clamp(18px, 5vw, 72px);
}

.section-head {
  max-width: 760px;
  display: grid;
  gap: 10px;
  margin-bottom: 28px;
}

h2 {
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.12;
}

.feature-grid,
.plan-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.feature-grid article,
.plan-grid article {
  min-height: 220px;
  display: grid;
  align-content: start;
  gap: 14px;
  padding: 24px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 8px 24px rgba(16, 24, 40, .04);
}

.feature-grid span {
  color: var(--brand);
  font-weight: 900;
}

.feature-grid p,
.split-section p,
.plans p {
  color: var(--muted);
  line-height: 1.75;
}

.split-section {
  display: grid;
  grid-template-columns: minmax(0, .9fr) minmax(380px, 1fr);
  gap: clamp(24px, 5vw, 72px);
  align-items: start;
  background: #fff;
}

.split-section > div {
  display: grid;
  gap: 14px;
}

.steps {
  display: grid;
  gap: 12px;
  padding: 0;
  margin: 0;
  list-style: none;
  counter-reset: step;
}

.steps li {
  counter-increment: step;
  display: grid;
  grid-template-columns: 50px 1fr;
  gap: 6px 16px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #f8fafc;
}

.steps li::before {
  content: counter(step);
  grid-row: 1 / 3;
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  border-radius: 8px;
  background: var(--brand-dark);
  color: #fff;
  font-weight: 900;
}

.steps span {
  color: var(--muted);
}

.plan-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.plan-grid article {
  min-height: 180px;
}

.plan-grid strong {
  font-size: 36px;
}

.plan-grid .featured {
  border-color: var(--brand);
  box-shadow: 0 16px 38px rgba(214,170,22,.15);
}

footer {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 28px clamp(18px, 5vw, 72px);
  background: #111827;
  color: #fff;
}

footer span {
  color: rgba(255,255,255,.72);
}

@media (max-width: 920px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
  }

  nav {
    width: 100%;
    overflow-x: auto;
    padding-bottom: 2px;
  }

  .hero,
  .split-section {
    grid-template-columns: 1fr;
  }

  .product-shot {
    grid-template-columns: 72px 1fr;
    min-height: 330px;
  }

  .feature-grid,
  .plan-grid {
    grid-template-columns: 1fr;
  }
}