:root {
  --ink: #131313;
  --ink-soft: #252525;
  --blue: #5a96f0;
  --blue-deep: #2e65ad;
  --mist: #f4f8ff;
  --paper: #ffffff;
  --line: #dce4ef;
  --body: #3d4652;
  --shadow: 0 12px 28px rgba(24, 47, 78, .12);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-width: 320px;
  padding-top: 80px;
  color: var(--body);
  background: var(--paper);
  font-family: Arial, "Noto Sans TC", "Microsoft JhengHei", sans-serif;
  font-size: 1rem;
  line-height: 1.65;
}

a { color: inherit; }

.navbar {
  position: fixed;
  inset: 0 0 auto;
  z-index: 20;
  display: flex;
  justify-content: center;
  height: 80px;
  background: var(--ink);
  box-shadow: 0 2px 10px rgba(0, 0, 0, .28);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(1200px, 100%);
  padding: 0 24px;
}

.nav-logo {
  color: #fff;
  font-size: 1.32rem;
  font-weight: 700;
  letter-spacing: .03em;
  text-decoration: none;
}

.nav-logo span { color: #93c0ff; }

.nav-links { display: flex; align-items: center; gap: 4px; margin: 0; padding: 0; list-style: none; }

.nav-links a {
  display: block;
  padding: .72rem .85rem;
  color: #fff;
  font-size: .98rem;
  text-decoration: none;
}

.nav-links a:hover, .nav-links a:focus-visible { color: #94c4ff; outline: none; }

.menu-toggle { display: none; border: 0; background: transparent; color: #fff; font-size: 1.5rem; }

.hero {
  position: relative;
  overflow: hidden;
  min-height: 565px;
  background: linear-gradient(135deg, #fff 0%, #f5f9ff 55%, #e8f1ff 100%);
}

.hero::after {
  position: absolute;
  right: -12rem;
  bottom: -17rem;
  width: 43rem;
  height: 43rem;
  border: 1px solid rgba(90, 150, 240, .16);
  border-radius: 50%;
  content: "";
}

.hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, .94fr);
  align-items: center;
  gap: 3.5rem;
  width: min(1100px, calc(100% - 48px));
  min-height: 565px;
  margin: 0 auto;
  padding: 4rem 0;
}

.eyebrow { margin: 0 0 .65rem; color: var(--blue-deep); font-size: .86rem; font-weight: 700; letter-spacing: .13em; }
a.eyebrow { display: inline-block; text-decoration: none; }
a.eyebrow:hover, a.eyebrow:focus-visible { color: var(--ink); text-decoration: underline; text-underline-offset: .22rem; outline: none; }

h1, h2, h3 { color: #222; line-height: 1.24; }
h1 { margin: 0; font-size: clamp(2.35rem, 5vw, 4.4rem); letter-spacing: -.04em; }
h2 { margin: 0 0 1rem; font-size: clamp(1.7rem, 3vw, 2.4rem); }
h3 { margin: 0 0 .45rem; font-size: 1.18rem; }

.hero .lead { max-width: 39rem; margin: 1.35rem 0 1.9rem; font-size: 1.18rem; }
.hero .minor { max-width: 35rem; margin: 0 0 1.9rem; color: #5a6574; }

.button-row { display: flex; flex-wrap: wrap; gap: .8rem; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: .7rem 1.25rem;
  border: 1px solid var(--blue);
  border-radius: 999px;
  background: var(--blue);
  color: #fff;
  font-weight: 700;
  text-decoration: none;
  transition: transform .2s ease, background .2s ease;
}

.button:hover, .button:focus-visible { background: var(--blue-deep); transform: translateY(-2px); outline: none; }
.button.secondary { background: transparent; color: var(--blue-deep); }
.button.secondary:hover, .button.secondary:focus-visible { background: #e9f2ff; }

.hero-photo {
  overflow: hidden;
  border-radius: 12px;
  box-shadow: 0 16px 32px rgba(25, 43, 70, .22);
}
.hero-photo img { display: block; width: 100%; min-height: 335px; object-fit: cover; }

.section { width: min(1100px, calc(100% - 48px)); margin: 0 auto; padding: 5.5rem 0; }
.page-hero { padding: 4.6rem 0 3rem; background: linear-gradient(135deg, #fff, #f1f7ff); }
.page-hero .inner { width: min(1100px, calc(100% - 48px)); margin: 0 auto; }
.page-hero p:last-child { max-width: 42rem; margin-bottom: 0; font-size: 1.12rem; }
.section-top { display: flex; align-items: end; justify-content: space-between; gap: 2rem; margin-bottom: 2rem; }
.section-top p { max-width: 34rem; margin: 0; }
.soft { background: var(--mist); }
.soft .section { padding-top: 4.8rem; padding-bottom: 4.8rem; }

.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.3rem; }
.card {
  padding: 1.7rem;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fff;
  box-shadow: 0 6px 18px rgba(24, 47, 78, .055);
}
.step { position: relative; padding-top: 4rem; }
.step-number { position: absolute; top: 1.4rem; left: 1.6rem; color: var(--blue); font-size: 1.1rem; font-weight: 800; }
.card p { margin: 0; }

.product-card { display: grid; grid-template-columns: minmax(260px, .9fr) 1.1fr; overflow: hidden; border: 1px solid var(--line); border-radius: 12px; background: #fff; box-shadow: var(--shadow); }
.product-stack { display: grid; gap: 1.5rem; }
.size-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.3rem; margin-top: 1.5rem; }
.size-card { min-height: 230px; padding: 2rem; border: 1px solid var(--line); border-radius: 12px; background: linear-gradient(145deg, #fff, #f3f8ff); box-shadow: 0 6px 18px rgba(24, 47, 78, .055); }
.size-card .size-mark { margin: 0 0 .35rem; color: var(--blue-deep); font-size: 2.3rem; font-weight: 800; letter-spacing: -.05em; }
.size-card p { margin: 0 0 1.35rem; }
.product-photo { display: flex; align-items: center; justify-content: center; min-height: 320px; padding: 2rem; background: #f5f7fa; }
.product-photo img { width: 100%; max-height: 260px; object-fit: contain; }
.spec-badge { display: grid; place-items: center; width: 130px; height: 130px; border: 1px solid #b9d1f5; border-radius: 50%; color: var(--blue-deep); background: #eef6ff; font-size: 1.5rem; font-weight: 800; }
.product-info { padding: 2.4rem; }
.product-info p { margin: 0 0 1.25rem; }
.product-info ul { margin: 0 0 1.5rem; padding-left: 1.15rem; }
.product-info li + li { margin-top: .4rem; }

.notice { padding: 1.3rem 1.5rem; border-left: 4px solid var(--blue); border-radius: 0 8px 8px 0; background: #ecf4ff; color: #35475d; }
.contact { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 2rem; padding: 2.4rem; border-radius: 12px; background: var(--ink); color: #dfe9f8; }
.contact h2 { color: #fff; }
.contact p { margin: 0; }
.contact .button.secondary { border-color: #9fc8ff; color: #fff; }
.contact .button.secondary:hover { background: #2b3a51; }

.contact-details { display: grid; gap: .35rem; margin-top: 1.15rem; }
.contact-details a { color: inherit; text-decoration-color: #8ebeff; text-underline-offset: .17rem; }
.feature-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.2rem; margin: 0; padding: 0; list-style: none; }
.feature-list li { padding: 1.3rem; border: 1px solid var(--line); border-radius: 12px; background: #fff; }
.feature-list strong { display: block; margin-bottom: .3rem; color: #202a38; }

.showcase {
  position: relative;
  min-height: min(58vw, 560px);
  overflow: hidden;
  border-radius: 14px;
  background: #1a1f27;
  box-shadow: var(--shadow);
}
.showcase-scene { position: absolute; inset: 0; opacity: 0; animation: showcase-scene 12s infinite; }
.showcase-scene img { width: 100%; height: 100%; object-fit: cover; animation: showcase-zoom 12s infinite; }
.showcase-scene:nth-child(2) { animation-delay: 6s; }
.showcase-caption { position: absolute; z-index: 2; right: 0; bottom: 0; left: 0; padding: 2.6rem; color: #fff; background: linear-gradient(transparent, rgba(6, 10, 16, .86)); }
.showcase-caption p { margin: 0; color: #d6e6fb; }
.showcase-caption strong { display: block; font-size: clamp(1.4rem, 3vw, 2rem); }
@keyframes showcase-scene { 0%, 44% { opacity: 1; } 50%, 94% { opacity: 0; } 100% { opacity: 1; } }
@keyframes showcase-zoom { from { transform: scale(1); } to { transform: scale(1.06); } }

.footer { padding: 2.4rem 24px; background: #f1f3f6; color: #526071; text-align: center; font-size: .9rem; }
.footer p { margin: .18rem 0; }
.footer a { color: #354d6e; text-underline-offset: .15rem; }

@media (max-width: 760px) {
  body { padding-top: 70px; }
  .navbar { height: 70px; }
  .nav-container { height: 70px; padding: 0 18px; }
  .nav-logo { font-size: 1.05rem; }
  .menu-toggle { display: block; cursor: pointer; }
  .nav-links { position: absolute; top: 70px; right: 0; left: 0; display: none; padding: .7rem 18px 1.1rem; background: var(--ink); box-shadow: 0 10px 16px rgba(0,0,0,.16); }
  .nav-links.open { display: block; }
  .nav-links a { padding: .65rem 0; }
  .hero { min-height: auto; }
  .hero-grid, .product-card { grid-template-columns: 1fr; }
  .hero-grid { width: min(100% - 36px, 620px); min-height: auto; gap: 2rem; padding: 3.4rem 0; }
  .hero-photo { order: -1; }
  .hero-photo img { min-height: 210px; }
  .section, .page-hero .inner { width: min(100% - 36px, 620px); }
  .section { padding: 3.8rem 0; }
  .section-top, .contact { grid-template-columns: 1fr; display: grid; gap: 1rem; }
  .grid-3, .feature-list { grid-template-columns: 1fr; }
  .size-grid { grid-template-columns: 1fr; }
  .product-info { padding: 1.6rem; }
  .product-photo { min-height: 250px; }
  .showcase { min-height: 370px; }
  .showcase-caption { padding: 1.5rem; }
}