:root {
  --ink: #101e29;
  --ink2: #233442;
  --muted: #53616b;
  --paper: #f4f5f2;
  --white: #fff;
  --orange: #f1794b;
  --line: #d8ddda;
  --max: 1240px;
  font-family: Arial, "Noto Sans TC", "Microsoft JhengHei", sans-serif;
  color: var(--ink);
  background: var(--paper)
}
* {
  box-sizing: border-box
}
html {
  scroll-behavior: smooth
}
body {
  margin: 0;
  min-width: 320px
}
button, a {
  touch-action: manipulation
}
a {
  color: inherit
}
a:focus-visible, summary:focus-visible {
  outline: 3px solid var(--orange);
  outline-offset: 4px
}
.container {
  width: min(var(--max), calc(100% - 72px));
  margin: auto
}
.skip-link {
  position: absolute;
  left: 16px;
  top: -60px;
  z-index: 100;
  padding: 12px;
  background: white
}
.skip-link:focus {
  top: 10px
}
.site-header {
  position: relative;
  z-index: 10;
  background: #fff
}
.header-inner {
  height: 88px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 26px
}
.brand {
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 12px;
  white-space: nowrap
}
.brand-symbol {
  font-size: 35px;
  font-weight: 900;
  letter-spacing: -.13em;
  line-height: 1
}
.brand-symbol span {
  color: var(--orange)
}
.brand-text {
  font-size: 18px;
  font-weight: 800;
  letter-spacing: .08em;
  line-height: 1.05
}
.brand-text small {
  display: block;
  font-size: 9px;
  letter-spacing: .2em;
  margin-top: 6px;
  color: #64717a
}
.desktop-nav {
  display: flex;
  gap: 26px;
  align-items: center
}
.desktop-nav a {
  font-size: 14px;
  text-decoration: none;
  font-weight: 700
}
.desktop-nav a:hover, .text-link:hover {
  color: var(--orange)
}
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 25px;
  border: 0;
  padding: 19px 25px;
  min-height: 58px;
  font-size: 15px;
  font-weight: 800;
  letter-spacing: .01em;
  text-decoration: none;
  transition: transform .2s, background-color .2s;
  line-height: 1.4
}
.button:hover {
  transform: translateY(-2px)
}
.button span {
  font-size: 19px;
  font-weight: 400
}
.button-small {
  padding: 13px 18px;
  min-height: 45px;
  font-size: 13px;
  gap: 18px
}
.button-dark {
  background: var(--ink);
  color: #fff
}
.button-dark:hover {
  background: #284355
}
.button-orange {
  background: var(--orange);
  color: #121d24
}
.button-orange:hover {
  background: #ff956b
}
.hero {
  min-height: 690px;
  position: relative;
  isolation: isolate;
  background: #172631;
  color: #fff;
  overflow: hidden
}
.hero-image, .hero-overlay {
  position: absolute;
  inset: 0;
  z-index: -1
}
.hero-image {
  background-image: url('../images/industrial-ventilation.jpg');
  background-position: center 49%;
  background-size: cover
}
.hero-overlay {
  background: linear-gradient(90deg, rgba(8, 22, 31, .96) 0%, rgba(8, 22, 31, .88) 34%, rgba(8, 22, 31, .43) 70%, rgba(8, 22, 31, .28) 100%), linear-gradient(0deg, rgba(8, 22, 31, .4), transparent 40%)
}
.hero-content {
  min-height: 690px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
  padding-top: 75px;
  padding-bottom: 70px
}
.hero-copy {
  max-width: 770px
}
.eyebrow {
  font-weight: 800;
  letter-spacing: .18em;
  font-size: 12px;
  display: flex;
  align-items: center;
  gap: 14px;
  margin: 0 0 30px;
  color: #51606b
}
.eyebrow.light {
  color: #d7e0e5
}
.eyebrow-rule {
  display: inline-block;
  width: 30px;
  height: 2px;
  background: var(--orange);
  flex: none
}
h1, h2, h3, p {
  margin-top: 0
}
h1 {
  font-size: clamp(43px, 5.4vw, 78px);
  letter-spacing: -.055em;
  line-height: 1.22;
  margin-bottom: 24px;
  font-weight: 900
}
h1 em {
  font-style: normal;
  color: var(--orange)
}
.hero-lead {
  font-size: 20px;
  line-height: 1.85;
  max-width: 650px;
  color: #e6eaeb;
  margin-bottom: 32px
}
.hero-actions {
  display: flex;
  align-items: center;
  gap: 26px;
  flex-wrap: wrap
}
.text-link {
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
  white-space: nowrap
}
.text-link span {
  margin-left: 8px
}
.hero-note {
  font-size: 13px;
  color: #bbc8ce;
  margin: 19px 0 0
}
.hero-index {
  align-self: flex-end;
  display: flex;
  gap: 13px;
  align-items: baseline;
  white-space: nowrap;
  color: #aab8c0;
  font-size: 11px;
  letter-spacing: .2em
}
.hero-index strong {
  font-size: 32px;
  color: #fff;
  font-weight: 400
}
.hero-index span {
  color: var(--orange)
}
.section {
  padding: 112px 0
}
h2 {
  font-size: clamp(34px, 4vw, 55px);
  letter-spacing: -.055em;
  line-height: 1.29;
  font-weight: 900;
  margin: 0
}
.accent {
  color: #da663d
}
.intro-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 9%
}
.intro-right {
  padding-top: 9px;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.9
}
.intro-right .large-copy {
  font-size: 21px;
  line-height: 1.7;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 20px
}
.hairline {
  height: 1px;
  background: var(--line);
  display: block;
  margin: 32px 0 13px
}
.problem-list > div {
  display: flex;
  gap: 18px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
  font-weight: 700;
  color: var(--ink);
  line-height: 1.5
}
.problem-list b {
  font-size: 12px;
  color: #c66442;
  margin-top: 4px
}
.flow-section {
  background: #e7ebe9
}
.section-heading {
  display: flex;
  justify-content: space-between;
  gap: 45px;
  align-items: flex-end;
  margin-bottom: 44px
}
.section-heading > div {
  max-width: 810px
}
.section-heading > p {
  max-width: 285px;
  font-size: 16px;
  line-height: 1.75;
  color: var(--muted);
  margin: 0 0 7px
}
.flow-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: #cdd4d1;
  border: 1px solid #cdd4d1
}
.flow-card {
  background: #f7f8f6;
  min-height: 340px;
  padding: 31px;
  display: flex;
  flex-direction: column
}
.flow-number {
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .13em;
  color: #6b797f
}
.flow-icon {
  font-size: 48px;
  line-height: 1;
  margin: auto 0 18px;
  color: #d5663f;
  font-family: Georgia, serif
}
.flow-card h3 {
  font-size: 23px;
  letter-spacing: -.03em;
  margin: 0 0 13px
}
.flow-card p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
  margin: 0
}
.showcase {
  background: var(--ink);
  color: #fff
}
.showcase-grid {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 8%;
  align-items: center
}
.showcase-copy h2 {
  font-size: clamp(34px, 3.7vw, 50px);
  margin-bottom: 24px
}
.showcase-copy > p:not(.eyebrow) {
  font-size: 17px;
  line-height: 1.85;
  color: #cbd5d9
}
.showcase-copy .showcase-disclaimer {
  font-size: 13px !important;
  color: #a5b4bb !important;
  border-left: 2px solid var(--orange);
  padding-left: 14px;
  margin-top: 28px
}
.site-preview {
  box-shadow: 0 28px 70px #071119;
  background: #fafbf9;
  color: var(--ink);
  transform: rotate(1.2deg)
}
.preview-top {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 17px 21px;
  border-bottom: 1px solid #dfe5e1;
  color: #75838a;
  font-size: 10px;
  font-weight: 800;
  letter-spacing: .14em
}
.preview-top span:last-child {
  margin-left: auto;
  color: #d16b46;
  font-size: 18px
}
.preview-dot {
  height: 9px;
  width: 9px;
  border-radius: 50%;
  background: var(--orange)
}
.preview-main {
  padding: 35px 38px 32px
}
.preview-tag {
  font-size: 11px;
  background: #e9efeb;
  color: #526f64;
  padding: 7px 10px;
  font-weight: 700
}
.preview-main h3 {
  font-size: 27px;
  line-height: 1.35;
  letter-spacing: -.04em;
  max-width: 340px;
  margin: 18px 0 9px
}
.preview-main > p {
  font-size: 13px;
  color: #65747b
}
.preview-lines {
  margin-top: 31px;
  border-top: 1px solid #dbe1dd
}
.preview-lines > div {
  padding: 15px 0;
  border-bottom: 1px solid #dbe1dd;
  display: grid;
  grid-template-columns: 25px 1fr auto;
  gap: 10px;
  align-items: center
}
.preview-lines span {
  color: #d36b47;
  font-size: 11px;
  font-weight: 800
}
.preview-lines strong {
  font-size: 14px
}
.preview-lines small {
  color: #78848b;
  font-size: 11px
}
.service {
  background: #f6f7f4
}
.service-list {
  border-top: 1px solid #cbd3ce
}
.service-row {
  display: grid;
  grid-template-columns: 60px 1fr 1.2fr;
  gap: 35px;
  align-items: center;
  border-bottom: 1px solid #cbd3ce;
  padding: 28px 0
}
.service-row > span {
  color: #d56d49;
  font-size: 14px;
  font-weight: 800
}
.service-row h3 {
  font-size: 23px;
  margin: 0;
  letter-spacing: -.03em
}
.service-row p {
  font-size: 15px;
  line-height: 1.8;
  margin: 0;
  color: var(--muted)
}
.service-footnote {
  font-size: 13px;
  line-height: 1.7;
  color: #66757e;
  margin: 22px 0 0
}
.process {
  background: #213441;
  color: #fff
}
.process-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 11%
}
.process-grid h2 {
  margin-bottom: 22px
}
.process-grid p:not(.eyebrow) {
  font-size: 16px;
  line-height: 1.85;
  color: #c6d1d5
}
.process-offer {
  margin-top: 36px;
  border: 1px solid #62727a;
  padding: 22px;
  display: flex;
  gap: 15px;
  align-items: flex-start
}
.process-offer strong {
  color: #ff966e;
  white-space: nowrap
}
.process-offer span {
  font-size: 14px;
  line-height: 1.7
}
.process-steps > div {
  border-top: 1px solid #60717a;
  padding: 22px 0 23px
}
.process-steps > div:last-child {
  border-bottom: 1px solid #60717a
}
.process-steps span {
  font-size: 11px;
  letter-spacing: .14em;
  color: #ff956d;
  font-weight: 800
}
.process-steps h3 {
  font-size: 22px;
  margin: 10px 0 7px
}
.process-steps p {
  margin: 0 !important;
  font-size: 15px !important
}
.faq {
  background: #f6f7f4
}
.faq-grid {
  display: grid;
  grid-template-columns: .8fr 1.2fr;
  gap: 10%
}
.faq-items {
  border-top: 1px solid var(--line)
}
.faq-items details {
  border-bottom: 1px solid var(--line)
}
.faq-items summary {
  cursor: pointer;
  list-style: none;
  padding: 23px 36px 23px 0;
  font-size: 17px;
  font-weight: 800;
  position: relative;
  line-height: 1.5
}
.faq-items summary::-webkit-details-marker {
  display: none
}
.faq-items summary:after {
  content: '+';
  position: absolute;
  right: 2px;
  top: 18px;
  font-size: 25px;
  font-weight: 400;
  color: #d46b48
}
.faq-items details[open] summary:after {
  content: '−'
}
.faq-items p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
  padding-right: 28px;
  margin: 0 0 23px
}
.final-cta {
  padding: 90px 0;
  background: #0e1e29;
  color: #fff
}
.final-grid {
  display: grid;
  grid-template-columns: 1fr 390px;
  align-items: center;
  gap: 8%
}
.final-grid h2 {
  margin-bottom: 18px
}
.final-grid p:not(.eyebrow) {
  color: #c5d0d5;
  line-height: 1.8
}
.contact-card {
  border: 1px solid #536570;
  padding: 28px;
  background: #1c303e
}
.contact-card p {
  font-weight: 800;
  color: #fff !important;
  font-size: 18px;
  margin-bottom: 18px
}
.contact-card .button {
  width: 100%;
  text-align: center;
  gap: 15px;
  font-size: 14px
}
.contact-card small {
  display: block;
  color: #b8c9d0;
  font-size: 13px;
  line-height: 1.7;
  margin-top: 15px
}
.site-footer {
  background: #09151d;
  color: #b0bcc2;
  padding: 29px 0
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 25px;
  font-size: 12px;
  line-height: 1.5
}
.footer-brand {
  color: #fff
}
.footer-brand .brand-symbol {
  font-size: 27px
}
.footer-brand .brand-text {
  font-size: 12px
}
.footer-brand .brand-text small {
  font-size: 8px
}
@media(max-width:1050px) {
  .desktop-nav {
    display: none
  }
  .header-inner {
    height: 75px
  }
  .hero, .hero-content {
    min-height: 650px
  }
  .hero-index {
    display: none
  }
  .section {
    padding: 88px 0
  }
  .service-row {
    grid-template-columns: 40px 1fr 1.3fr;
    gap: 20px
  }
}
@media(max-width:760px) {
  .container {
    width: min(100% - 36px, var(--max))
  }
  .site-header .header-cta {
    padding: 10px 12px;
    font-size: 12px;
    min-height: 42px;
    gap: 6px
  }
  .brand-symbol {
    font-size: 30px
  }
  .brand-text {
    font-size: 12px
  }
  .brand-text small {
    font-size: 7px
  }
  .hero, .hero-content {
    min-height: 650px
  }
  .hero-content {
    padding-top: 80px;
    padding-bottom: 76px
  }
  .hero-image {
    background-position: 60% center
  }
  .hero-overlay {
    background: linear-gradient(90deg, rgba(8, 22, 31, .94), rgba(8, 22, 31, .77)), linear-gradient(0deg, rgba(8, 22, 31, .38), transparent)
  }
  h1 {
    font-size: clamp(40px, 10vw, 60px)
  }
  .hero-lead {
    font-size: 17px
  }
  .hero-actions {
    align-items: stretch;
    flex-direction: column;
    gap: 20px
  }
  .hero-actions .button {
    width: 100%;
    font-size: 14px;
    gap: 12px
  }
  .text-link {
    align-self: flex-start
  }
  .section {
    padding: 72px 0
  }
  .intro-grid, .showcase-grid, .process-grid, .faq-grid, .final-grid {
    grid-template-columns: 1fr;
    gap: 39px
  }
  .section-heading {
    display: block
  }
  .section-heading > p {
    max-width: 600px;
    margin-top: 20px
  }
  .flow-grid {
    grid-template-columns: 1fr
  }
  .flow-card {
    min-height: 220px;
    padding: 24px
  }
  .flow-icon {
    margin: 28px 0 14px;
    font-size: 37px
  }
  .showcase {
    overflow: hidden
  }
  .site-preview {
    transform: none
  }
  .service-row {
    grid-template-columns: 32px 1fr;
    gap: 12px;
    align-items: start;
    padding: 22px 0
  }
  .service-row p {
    grid-column: 2
  }
  .service-row h3 {
    font-size: 20px
  }
  .process-offer {
    display: block
  }
  .process-offer strong {
    display: block;
    margin-bottom: 6px
  }
  .final-cta {
    padding: 72px 0
  }
  .footer-inner {
    flex-wrap: wrap
  }
  .footer-inner span:nth-child(2) {
    width: 100%;
    order: 3
  }
}
@media(max-width:420px) {
  .header-inner {
    gap: 6px
  }
  .brand {
    gap: 6px
  }
  .brand-text {
    font-size: 11px
  }
  .site-header .header-cta {
    font-size: 11px
  }
  .site-header .header-cta span {
    display: none
  }
  .preview-main {
    padding: 26px 22px
  }
  .preview-lines > div {
    grid-template-columns: 23px 1fr
  }
  .preview-lines small {
    grid-column: 2
  }
  .button {
    padding: 16px 14px
  }
  .hero-note {
    font-size: 12px
  }
}
@media(prefers-reduced-motion:reduce) {
  html {
    scroll-behavior: auto
  }
  .button {
    transition: none
  }
}
/* Industrial and exhibition scenes support the product-to-inquiry story. */
.visual-pair {
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  gap: 18px;
  margin-top: 24px
}
.visual-figure {
  position: relative;
  margin: 0;
  min-height: 300px;
  overflow: hidden;
  background: #c8d0d1
}
.visual-figure img {
  display: block;
  width: 100%;
  height: 100%;
  min-height: 300px;
  object-fit: cover;
  aspect-ratio: 1.7
}
.visual-figure:first-child img {
  object-position: center
}
.visual-figure:nth-child(2) img {
  object-position: center 55%
}
.visual-figure:after {
  content: "";
  position: absolute;
  inset: 40% 0 0;
  background: linear-gradient(transparent, rgba(7, 20, 29, .86));
  pointer-events: none
}
.visual-figure figcaption {
  position: absolute;
  z-index: 1;
  left: 26px;
  right: 24px;
  bottom: 23px;
  color: white;
  display: flex;
  flex-direction: column;
  gap: 9px
}
.visual-figure figcaption span {
  font-size: 11px;
  letter-spacing: .15em;
  color: #ffd0b9;
  font-weight: 800
}
.visual-figure figcaption strong {
  font-size: 20px;
  line-height: 1.4
}
@media(max-width:760px) {
  .visual-pair {
    grid-template-columns: 1fr;
    gap: 14px
  }
  .visual-figure, .visual-figure img {
    min-height: 250px
  }
  .visual-figure img {
    height: 250px;
    aspect-ratio: auto
  }
  .visual-figure figcaption {
    left: 20px;
    bottom: 19px
  }
  .visual-figure figcaption strong {
    font-size: 18px
  }
}