:root {
  --ink: #141821;
  --muted: #5f6673;
  --line: #dfe7ec;
  --teal: #0786a8;
  --teal-dark: #00617f;
  --red: #d91f35;
  --bg: #f4f8fb;
  --white: #fff;
  font-family: "Noto Sans TC", "Microsoft JhengHei", system-ui, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--bg);
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; height: auto; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 14px clamp(18px, 4vw, 64px);
  background: rgba(255,255,255,.9);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(223,231,236,.85);
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 900;
  letter-spacing: 0;
}
.brand-mark {
  display: grid;
  place-items: center;
  width: 54px;
  height: 42px;
  color: var(--white);
  background: var(--red);
  border-radius: 4px;
  font-size: 22px;
  transform: skew(-10deg);
}
.nav { display: flex; gap: clamp(14px, 3vw, 36px); font-weight: 700; color: #3c4450; }
.nav a:hover { color: var(--teal); }

.hero {
  position: relative;
  min-height: min(760px, calc(100vh - 70px));
  overflow: hidden;
  background: #eaf2f7;
}
.hero-image {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.hero-copy {
  position: relative;
  z-index: 1;
  max-width: 760px;
  padding: clamp(72px, 10vw, 130px) clamp(22px, 7vw, 120px) 220px;
}
.eyebrow {
  margin: 0 0 12px;
  color: var(--teal);
  font-weight: 900;
  letter-spacing: .08em;
}
h1, h2, h3, p { margin-top: 0; }
h1 {
  margin-bottom: 18px;
  font-size: clamp(52px, 7.2vw, 116px);
  line-height: .95;
  font-weight: 950;
  letter-spacing: 0;
  color: #3d424b;
  text-shadow: 0 3px 0 #fff, 0 10px 22px rgba(36,51,67,.16);
}
.lead {
  max-width: 570px;
  font-size: clamp(18px, 2vw, 26px);
  line-height: 1.55;
  color: #2f3742;
  font-weight: 700;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border: 0;
  border-radius: 4px;
  font-weight: 900;
  cursor: pointer;
}
.button.primary { color: var(--white); background: linear-gradient(180deg, #0aa0c8, var(--teal-dark)); }
.button.secondary { color: var(--teal-dark); background: var(--white); box-shadow: inset 0 0 0 1px var(--line); }
.hero-offers {
  position: absolute;
  z-index: 2;
  left: clamp(22px, 7vw, 120px);
  right: clamp(22px, 7vw, 120px);
  bottom: 36px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}
.hero-offers div {
  padding: 18px 22px;
  background: rgba(255,255,255,.9);
  border: 1px solid rgba(255,255,255,.7);
  border-radius: 8px;
  box-shadow: 0 16px 40px rgba(36,51,67,.12);
}
.hero-offers span, .hero-offers em { display: block; color: #343b46; font-style: normal; font-weight: 900; }
.hero-offers strong { color: var(--teal); font-size: clamp(38px, 5vw, 76px); line-height: 1; }

.section {
  padding: clamp(58px, 8vw, 100px) clamp(20px, 5vw, 72px);
  max-width: 1280px;
  margin: 0 auto;
}
.section.compact { padding-top: 72px; }
.section-head { max-width: 760px; margin-bottom: 28px; }
h2 { font-size: clamp(32px, 4.8vw, 58px); line-height: 1.12; margin-bottom: 16px; }
.section p { color: var(--muted); line-height: 1.75; }
.benefit-grid, .model-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}
.benefit-card, .model-grid article, .lead-form {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 24px;
  box-shadow: 0 10px 30px rgba(24,40,58,.06);
}
.benefit-card.featured { background: linear-gradient(180deg, #fff, #edfaff); border-color: #b7e6f2; }
.tag { color: var(--red); font-weight: 900; font-size: 14px; }
.benefit-card h3, .model-grid h3 { margin: 10px 0; font-size: 24px; }
.benefit-card strong { color: var(--teal-dark); font-size: 28px; }

.split, .form-section {
  display: grid;
  grid-template-columns: .82fr 1fr;
  gap: clamp(26px, 5vw, 72px);
  align-items: center;
}
.steps { display: grid; gap: 16px; padding: 0; margin: 28px 0 0; list-style: none; }
.steps li {
  display: grid;
  gap: 4px;
  padding: 18px 20px;
  background: #fff;
  border-left: 6px solid var(--teal);
  border-radius: 6px;
}
.steps strong { font-size: 22px; }
.steps span { color: var(--muted); line-height: 1.65; }
.process-image { overflow: hidden; border-radius: 8px; box-shadow: 0 18px 50px rgba(24,40,58,.13); }
.models { max-width: none; background: #fff; }
.models .section-head, .model-grid { max-width: 1280px; margin-left: auto; margin-right: auto; }
.model-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.model-grid span { color: var(--teal-dark); font-weight: 900; }

.form-section { align-items: start; }
.lead-form { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.lead-form label { display: grid; gap: 8px; color: #2f3742; font-weight: 800; }
.lead-form input, .lead-form select {
  width: 100%;
  min-height: 48px;
  padding: 0 12px;
  border: 1px solid #c9d5dc;
  border-radius: 4px;
  font: inherit;
  background: #fff;
}
.lead-form button, .form-note { grid-column: 1 / -1; }
.form-note { min-height: 24px; margin: 0; font-weight: 800; color: var(--teal-dark); }
.site-footer {
  padding: 28px clamp(20px, 5vw, 72px);
  background: #1d232c;
  color: #dfe7ec;
  font-size: 14px;
  line-height: 1.7;
}
.site-footer p { max-width: 1280px; margin: 0 auto; }

@media (max-width: 900px) {
  .nav { display: none; }
  .hero { min-height: 760px; }
  .hero-image { object-position: 68% center; }
  .hero-copy { padding: 58px 22px 310px; }
  .hero-offers { grid-template-columns: 1fr; bottom: 18px; }
  .benefit-grid, .model-grid, .split, .form-section, .lead-form { grid-template-columns: 1fr; }
}

@media (max-width: 560px) {
  .brand span:last-child { font-size: 15px; }
  h1 { font-size: 48px; }
  .lead { font-size: 17px; }
  .hero { min-height: 820px; }
  .button { width: 100%; }
}