:root {
  --ink: #14202b;
  --navy: #0c1c33;
  --navy-2: #16324f;
  --paper: #f3efe7;
  --paper-2: #e8e2d6;
  --white: #fbf9f5;
  --gold: #a68456;
  --gold-2: #d7c4a4;
  --line: rgba(20, 32, 43, 0.14);
  --line-light: rgba(243, 239, 231, 0.18);
  --muted: #5d6872;
  --serif: "Noto Serif TC", "Songti TC", "PMingLiU", "Times New Roman", serif;
  --sans: "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", sans-serif;
  --wrap: 1120px;
  --header: 76px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--sans);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.75;
}

img { max-width: 100%; }

a { color: inherit; }

:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
}

::selection {
  background: var(--gold-2);
  color: var(--navy);
}

.skip {
  position: absolute;
  left: 16px;
  top: -40px;
  background: var(--navy);
  color: var(--paper);
  padding: 8px 12px;
  z-index: 20;
}

.skip:focus { top: 12px; }

.wrap {
  width: min(var(--wrap), calc(100% - 40px));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  height: var(--header);
  display: flex;
  align-items: center;
  background: var(--paper);
  border-bottom: 1px solid var(--line);
}

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: flex;
  flex-direction: column;
  text-decoration: none;
  line-height: 1.1;
}

.brand-zh {
  font-family: var(--serif);
  font-size: 22px;
  letter-spacing: 0.18em;
}

.brand-en {
  margin-top: 4px;
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--muted);
}

.nav-toggle {
  display: none;
  border: 1px solid var(--ink);
  background: transparent;
  color: var(--ink);
  font: inherit;
  padding: 8px 14px;
  letter-spacing: 0.12em;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 22px;
}

.site-nav a {
  text-decoration: none;
  font-size: 15px;
  letter-spacing: 0.04em;
}

.site-nav a:hover,
.site-nav a[aria-current="page"],
.site-nav a.is-current {
  color: var(--gold);
}

.nav-drop { position: relative; }

.nav-sub {
  display: none;
  position: absolute;
  top: calc(100% + 14px);
  left: 0;
  min-width: 196px;
  padding: 12px 0;
  background: var(--white);
  border: 1px solid var(--line);
}

.nav-sub a {
  display: block;
  padding: 8px 16px;
}

.nav-drop:hover .nav-sub,
.nav-drop:focus-within .nav-sub { display: block; }

.page-hero { padding: 56px 0 24px; }

.page-hero-grid,
.hero-grid,
.split {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
  align-items: center;
}

.crumbs {
  margin: 0 0 18px;
  color: var(--muted);
  font-size: 13px;
  letter-spacing: 0.06em;
}

.crumbs a { text-decoration: none; }

.crumbs a:hover { color: var(--gold); }

.eyebrow {
  margin: 0 0 12px;
  color: var(--gold);
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

h1, h2, h3 {
  font-family: var(--serif);
  font-weight: 500;
  line-height: 1.25;
  letter-spacing: 0.02em;
}

h1 {
  margin: 0;
  font-size: clamp(2rem, 4vw, 3.15rem);
}

h2 {
  margin: 0 0 18px;
  font-size: clamp(1.55rem, 2.4vw, 2.1rem);
}

h3 {
  margin: 0 0 8px;
  font-size: 1.2rem;
}

.lede, .subhead {
  margin: 18px 0 0;
  font-size: 1.05rem;
  color: var(--ink);
}

.subhead {
  color: var(--muted);
  letter-spacing: 0.12em;
}

.hero { padding: 36px 0 20px; }

.hero-actions, .cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border: 1px solid var(--navy);
  background: var(--navy);
  color: var(--paper);
  text-decoration: none;
  letter-spacing: 0.08em;
}

.btn-line {
  background: transparent;
  color: var(--navy);
}

.btn-lg {
  min-height: 58px;
  padding: 0 36px;
  font-size: 1.125rem;
}

.dark .btn {
  background: var(--paper);
  color: var(--navy);
  border-color: var(--paper);
}

.dark .btn-line {
  background: transparent;
  color: var(--paper);
  border-color: var(--gold-2);
}

.section { padding: 72px 0; }

.section-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 24px;
  margin-bottom: 28px;
}

.section-head h2 { margin: 0; }

.section-head a {
  color: var(--gold);
  text-decoration: none;
  letter-spacing: 0.08em;
  white-space: nowrap;
}

.rule {
  border: 0;
  border-top: 1px solid var(--line);
  margin: 0;
}

.dark { background: var(--navy); color: var(--paper); }

.dark .muted, .muted { color: var(--muted); }

.dark .muted { color: rgba(243, 239, 231, 0.72); }

.biz-list, .expert-list, .scene-list {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}

.biz-list li, .scene-list article {
  display: grid;
  grid-template-columns: 72px 1fr auto;
  gap: 18px;
  align-items: start;
  padding: 26px 0;
  border-top: 1px solid var(--line);
}

.scene-list article {
  grid-template-columns: 280px 1fr;
  gap: 32px;
  align-items: center;
}

.index-num {
  font-family: var(--serif);
  color: var(--gold);
  letter-spacing: 0.08em;
}

.biz-list h3, .scene-list h3 { margin-bottom: 6px; }

.biz-list p, .scene-list p { margin: 0; }

.biz-list a.more {
  text-decoration: none;
  letter-spacing: 0.08em;
  color: var(--gold);
  padding-top: 6px;
}

.layers, .metrics, .steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}

.layers { grid-template-columns: 1fr; }

.layers li {
  display: grid;
  grid-template-columns: 9.5rem 1fr;
  gap: 20px;
  align-items: baseline;
  border-left: 0;
  border-top: 1px solid var(--line-light);
  padding: 16px 0;
}

.layers li:first-child { border-top: 0; padding-top: 0; }

.layers span { margin-top: 0; }

.metrics li, .steps li {
  padding: 8px 22px 8px 0;
  border-left: 1px solid var(--line);
  padding-left: 18px;
}

.dark .metrics li, .dark .steps li {
  border-left-color: var(--line-light);
}

.metrics li:first-child,
.steps li:first-child { border-left: 0; padding-left: 0; }

.layers strong, .steps strong {
  display: block;
  margin-bottom: 8px;
  font-family: var(--serif);
  font-weight: 500;
  font-size: 1.15rem;
}

.metrics strong {
  display: block;
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(2rem, 3vw, 2.6rem);
  line-height: 1;
  color: var(--gold-2);
}

.metrics span, .layers span, .steps span {
  display: block;
  margin-top: 8px;
  color: var(--muted);
}

.layers span { margin-top: 0; }

.dark .metrics span, .dark .layers span, .dark .steps span {
  color: rgba(243, 239, 231, 0.78);
}

.steps.is-stack { grid-template-columns: 1fr; }

.steps.is-stack li {
  border-left: 0;
  border-top: 1px solid var(--line);
  padding: 16px 0 0;
}

.steps.is-stack li:first-child { border-top: 0; padding-top: 0; }

.paper-band { background: var(--white); }

.catalog {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.catalog article, .product-block {
  background: var(--white);
  border: 1px solid var(--line);
}

.product-photo {
  background: var(--navy);
  aspect-ratio: 1;
}

.product-photo img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}

.catalog div, .product-copy { padding: 16px 16px 18px; }

.kicker {
  margin: 0 0 8px;
  color: var(--gold);
  font-size: 13px;
  letter-spacing: 0.04em;
}

.catalog h3 { font-size: 1.05rem; }

.catalog p, .product-copy p { margin: 0; font-size: 14.5px; }

.catalog a { text-decoration: none; }

.product-sheet { display: grid; gap: 28px; }

.product-block {
  display: grid;
  grid-template-columns: 280px 1fr;
  scroll-margin-top: 96px;
}

.product-block .product-photo { aspect-ratio: auto; min-height: 280px; }

.media {
  position: relative;
  margin: 0;
  background: transparent;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  border: 0;
}

.media::before,
.media::after {
  content: none;
  display: none;
  border: 0;
}

.media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.media.is-empty img { display: none; }

.prose { max-width: 44rem; }

.prose p { margin: 0 0 1.05em; }

.expert-list li {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 20px;
  padding: 22px 0;
  border-top: 1px solid var(--line);
}

.expert-list h3 { margin: 0; }

.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
}

.stack { display: grid; gap: 18px; }

.cta-band { background: var(--navy); color: var(--paper); padding: 48px 0; }

.cta-band-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
}

.cta-band h2 { margin: 0 0 8px; }

.cta-band p { margin: 0; color: rgba(243, 239, 231, 0.8); }

.form {
  display: grid;
  gap: 16px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

label { display: grid; gap: 6px; font-size: 14px; }

input, select, textarea {
  width: 100%;
  border: 1px solid #cfc6b8;
  background: var(--white);
  color: var(--ink);
  font: inherit;
  padding: 12px 12px;
}

textarea { min-height: 140px; resize: vertical; }

.notice {
  border: 1px solid var(--line);
  background: var(--paper);
  color: var(--ink);
  padding: 28px 32px;
  max-width: 26rem;
}

.notice::backdrop { background: rgba(12, 28, 51, 0.45); }

.notice p { margin: 0 0 22px; }

.notice .btn {
  border: 0;
  cursor: pointer;
  font: inherit;
  letter-spacing: 0.08em;
}

.site-footer {
  background: #081422;
  color: rgba(243, 239, 231, 0.82);
  padding: 42px 0 28px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 28px;
}

.site-footer a { text-decoration: none; }

.site-footer a:hover { color: var(--gold-2); }

.site-footer strong {
  display: block;
  margin-bottom: 8px;
  color: var(--paper);
  font-weight: 500;
}

.site-footer ul { list-style: none; margin: 0; padding: 0; }

.legal-pt {
  font-size: 13px;
  line-height: 1.55;
}

.legal-name {
  margin: 28px 0 0;
  padding-top: 18px;
  border-top: 1px solid var(--line-light);
  font-size: 13px;
  letter-spacing: 0.03em;
}

@media (max-width: 980px) {
  .nav-toggle { display: inline-flex; }

  .site-nav {
    display: none;
    position: absolute;
    top: var(--header);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px 20px 18px;
    background: var(--paper);
    border-bottom: 1px solid var(--line);
  }

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

  .site-nav a, .nav-drop > a { padding: 12px 0; }

  .nav-sub {
    display: block;
    position: static;
    border: 0;
    background: transparent;
    padding: 0 0 8px 12px;
  }

  .page-hero-grid,
  .hero-grid,
  .split,
  .catalog,
  .metrics,
  .steps,
  .two-col,
  .footer-grid,
  .form-row,
  .product-block,
  .expert-list li,
  .scene-list article,
  .biz-list li,
  .cta-band-inner {
    grid-template-columns: 1fr;
  }

  .catalog { grid-template-columns: 1fr 1fr; }

  .biz-list li { grid-template-columns: 48px 1fr; }

  .biz-list a.more { grid-column: 2; }

  .metrics li, .steps li {
    border-left: 0;
    padding-left: 0;
    border-top: 1px solid var(--line);
    padding-top: 16px;
  }

  .dark .metrics li, .dark .steps li {
    border-top-color: var(--line-light);
  }

  .layers li { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .wrap { width: min(var(--wrap), calc(100% - 28px)); }
  .catalog { grid-template-columns: 1fr; }
  .section { padding: 52px 0; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}