:root {
  --bg: #080b12;
  --panel: #111827;
  --panel-2: #151e2f;
  --text: #f5f7fb;
  --muted: #aeb8ca;
  --line: rgba(255, 255, 255, 0.1);
  --cyan: #26d9ff;
  --lime: #a6ff4d;
  --magenta: #ff4fd8;
  --warning: #ffd166;
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.35);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at 20% 0%, rgba(38, 217, 255, 0.16), transparent 30rem),
    radial-gradient(circle at 90% 8%, rgba(166, 255, 77, 0.1), transparent 24rem),
    var(--bg);
  color: var(--text);
  font-family: Arial, "Microsoft JhengHei", "PingFang TC", sans-serif;
  line-height: 1.6;
}

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: 1rem;
  padding: 1rem clamp(1rem, 4vw, 3rem);
  background: rgba(8, 11, 18, 0.9);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(14px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  font-weight: 800;
  letter-spacing: 0;
}

.brand-mark {
  display: grid;
  width: 2.35rem;
  height: 2.35rem;
  place-items: center;
  border: 1px solid rgba(38, 217, 255, 0.45);
  background: linear-gradient(135deg, rgba(38, 217, 255, 0.28), rgba(166, 255, 77, 0.16));
  border-radius: 0.5rem;
  color: white;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.site-nav a {
  padding: 0.65rem 0.8rem;
  border-radius: 0.45rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.site-nav a:hover,
.site-nav a.active {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text);
}

.cart-link span {
  display: inline-grid;
  min-width: 1.4rem;
  height: 1.4rem;
  margin-left: 0.25rem;
  place-items: center;
  background: var(--lime);
  color: #101510;
  border-radius: 50%;
  font-size: 0.78rem;
  font-weight: 800;
}

.nav-toggle {
  display: none;
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--text);
  border-radius: 0.45rem;
  font-size: 1.2rem;
  padding: 0.4rem 0.65rem;
}

.hero,
.page-hero,
.section {
  width: min(1120px, calc(100% - 2rem));
  margin: 0 auto;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(320px, 0.95fr);
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
  min-height: 630px;
  padding: 4rem 0 3rem;
}

.hero h1,
.page-hero h1 {
  margin: 0;
  max-width: 760px;
  font-size: clamp(2.35rem, 6vw, 4.7rem);
  line-height: 1.05;
}

.hero p,
.page-hero p {
  max-width: 640px;
  color: var(--muted);
  font-size: 1.08rem;
}

.eyebrow {
  margin: 0 0 0.8rem;
  color: var(--lime);
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero-actions,
.card-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 1.5rem;
}

.detail-buy-row {
  display: flex;
  flex-wrap: wrap;
  align-items: end;
  gap: 0.8rem;
  margin-top: 1.5rem;
}

.qty-control {
  display: grid;
  gap: 0.35rem;
  min-width: 7.5rem;
  color: var(--muted);
  font-weight: 800;
}

.qty-control input {
  height: 2.75rem;
  max-width: 7.5rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.75rem;
  padding: 0.75rem 1rem;
  border: 1px solid var(--line);
  border-radius: 0.5rem;
  color: var(--text);
  font-weight: 800;
  cursor: pointer;
}

.button.primary {
  border-color: rgba(166, 255, 77, 0.35);
  background: linear-gradient(135deg, var(--lime), var(--cyan));
  color: #071014;
}

.button.ghost {
  background: rgba(255, 255, 255, 0.06);
}

.button.wide {
  width: 100%;
}

.hero-visual {
  position: relative;
  min-height: 430px;
  border: 1px solid var(--line);
  border-radius: 0.75rem;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.02)),
    repeating-linear-gradient(90deg, rgba(255,255,255,0.04) 0 1px, transparent 1px 42px);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.digital-card {
  position: absolute;
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: linear-gradient(145deg, rgba(21, 30, 47, 0.95), rgba(8, 11, 18, 0.9));
  box-shadow: 0 18px 60px rgba(0, 0, 0, 0.45);
}

.card-main {
  left: 16%;
  top: 28%;
  width: 68%;
  min-height: 180px;
  padding: 1.4rem;
  border-radius: 0.7rem;
}

.card-main span,
.card-main small {
  display: block;
  color: var(--muted);
}

.card-main strong {
  display: block;
  margin: 2.3rem 0 1.2rem;
  font-size: 2rem;
}

.card-small {
  display: grid;
  place-items: center;
  width: 170px;
  min-height: 86px;
  border-radius: 0.65rem;
  color: var(--text);
  font-weight: 800;
}

.card-small.top {
  right: 7%;
  top: 11%;
}

.card-small.bottom {
  left: 8%;
  bottom: 12%;
}

.signal-line {
  position: absolute;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--cyan), transparent);
}

.signal-line.one {
  top: 22%;
  left: 4%;
  width: 80%;
}

.signal-line.two {
  bottom: 28%;
  right: 8%;
  width: 72%;
  background: linear-gradient(90deg, transparent, var(--lime), transparent);
}

.section {
  padding: 3rem 0;
}

.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.4rem;
}

.section-heading h2,
.split-band h2,
.support-strip h2,
.panel h2,
.values-grid h2 {
  margin: 0;
  font-size: clamp(1.55rem, 3vw, 2.35rem);
}

.section-heading a {
  color: var(--cyan);
  font-weight: 800;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.product-card,
.panel,
.values-grid article,
.steps article,
details {
  border: 1px solid var(--line);
  border-radius: 0.65rem;
  background: rgba(17, 24, 39, 0.82);
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.2);
}

.product-card {
  display: flex;
  flex-direction: column;
  min-height: 315px;
  padding: 1rem;
}

.product-art {
  display: grid;
  min-height: 118px;
  margin-bottom: 1rem;
  place-items: center;
  border-radius: 0.55rem;
  background: linear-gradient(135deg, rgba(38, 217, 255, 0.2), rgba(166, 255, 77, 0.12));
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: white;
  font-size: 2.1rem;
  font-weight: 900;
}

.product-card h3 {
  margin: 0;
  font-size: 1.15rem;
}

.product-card p {
  color: var(--muted);
}

.product-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin: 0.75rem 0;
}

.tag {
  display: inline-flex;
  align-items: center;
  min-height: 1.75rem;
  padding: 0.25rem 0.55rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.82rem;
}

.price {
  margin-top: auto;
  color: var(--lime);
  font-size: 1.45rem;
  font-weight: 900;
}

.split-band,
.support-strip,
.page-hero {
  border-top: 1px solid var(--line);
}

.split-band {
  display: grid;
  grid-template-columns: 0.72fr 1.28fr;
  gap: 2rem;
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.steps article,
.panel,
.values-grid article,
details {
  padding: 1.25rem;
}

.steps span {
  display: grid;
  width: 2.2rem;
  height: 2.2rem;
  place-items: center;
  border-radius: 50%;
  background: rgba(166, 255, 77, 0.15);
  color: var(--lime);
  font-weight: 900;
}

.steps h3 {
  margin: 1rem 0 0.4rem;
}

.steps p,
.support-strip p,
.panel p,
.values-grid p,
details p {
  color: var(--muted);
}

.support-strip {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: 4rem;
}

.page-hero {
  padding: 4rem 0 2rem;
}

.page-hero.compact {
  padding-top: 3rem;
}

.filter-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-bottom: 1.2rem;
}

.chip {
  min-height: 2.35rem;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.05);
  color: var(--muted);
  border-radius: 999px;
  padding: 0.45rem 0.8rem;
  cursor: pointer;
}

.chip.active {
  background: rgba(38, 217, 255, 0.16);
  color: var(--text);
  border-color: rgba(38, 217, 255, 0.45);
}

.detail-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 1.5rem;
  padding-top: 4rem;
}

.detail-art {
  display: grid;
  min-height: 380px;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 0.75rem;
  background:
    radial-gradient(circle at center, rgba(38, 217, 255, 0.22), transparent 15rem),
    linear-gradient(145deg, rgba(166, 255, 77, 0.14), rgba(255, 79, 216, 0.1));
  font-size: 4rem;
  font-weight: 900;
}

.detail-copy h1 {
  margin: 0 0 1rem;
  font-size: clamp(2rem, 4vw, 3.4rem);
  line-height: 1.1;
}

.info-table {
  display: grid;
  gap: 0.65rem;
  margin: 1.4rem 0;
}

.info-table div {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.8rem;
  border: 1px solid var(--line);
  border-radius: 0.5rem;
  background: rgba(255, 255, 255, 0.04);
}

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

.checkout-layout,
.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 1rem;
}

.cart-item {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.75rem;
  align-items: center;
  padding: 0.9rem 0;
  border-bottom: 1px solid var(--line);
}

.cart-item strong,
.cart-total strong {
  display: block;
}

.cart-total {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding-top: 1rem;
  color: var(--lime);
  font-size: 1.25rem;
}

.remove-button {
  border: 1px solid rgba(255, 79, 216, 0.35);
  background: rgba(255, 79, 216, 0.08);
  color: var(--text);
  border-radius: 0.45rem;
  padding: 0.45rem 0.65rem;
  cursor: pointer;
}

.empty-state {
  color: var(--muted);
}

.order-form label {
  display: grid;
  gap: 0.45rem;
  margin: 1rem 0;
  color: var(--muted);
  font-weight: 700;
}

input,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 0.5rem;
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
  font: inherit;
  padding: 0.8rem;
}

textarea {
  resize: vertical;
}

.notice {
  border-left: 3px solid var(--warning);
  padding-left: 0.8rem;
}

.form-result {
  min-height: 1.5rem;
  color: var(--lime);
  font-weight: 800;
}

.values-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.clean-list {
  margin: 0;
  padding-left: 1.2rem;
  color: var(--muted);
}

.faq-list {
  display: grid;
  gap: 0.8rem;
}

summary {
  cursor: pointer;
  font-weight: 900;
}

.site-footer {
  width: min(1120px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 2rem 0;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

@media (max-width: 860px) {
  .nav-toggle {
    display: inline-flex;
  }

  .site-header {
    align-items: flex-start;
  }

  .site-nav {
    display: none;
    position: absolute;
    left: 1rem;
    right: 1rem;
    top: 4.6rem;
    flex-direction: column;
    align-items: stretch;
    padding: 0.8rem;
    background: #0b101a;
    border: 1px solid var(--line);
    border-radius: 0.65rem;
  }

  .site-nav.open {
    display: flex;
  }

  .hero,
  .split-band,
  .detail-layout,
  .checkout-layout,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    padding-top: 3rem;
  }

  .hero-visual {
    min-height: 340px;
  }

  .product-grid,
  .steps,
  .values-grid {
    grid-template-columns: 1fr;
  }

  .section-heading,
  .support-strip {
    align-items: flex-start;
    flex-direction: column;
  }

  .detail-art {
    min-height: 260px;
  }
}

@media (max-width: 480px) {
  .hero,
  .page-hero,
  .section,
  .site-footer {
    width: min(100% - 1rem, 1120px);
  }

  .hero h1,
  .page-hero h1 {
    font-size: 2.15rem;
  }

  .card-main {
    left: 8%;
    width: 84%;
  }

  .card-small {
    width: 145px;
  }

  .cart-item {
    grid-template-columns: 1fr;
  }
}