:root {
  --ink: #142b3a;
  --muted: #5f7180;
  --teal: #087b78;
  --teal-dark: #075d5b;
  --red: #e31f2b;
  --sky: #eaf6f7;
  --line: #dbe6e9;
  --white: #ffffff;
  --shadow: 0 24px 70px rgba(20, 43, 58, 0.13);
  --radius: 24px;
  --shell: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--white);
  font-family: "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", sans-serif;
  font-size: 16px;
  line-height: 1.7;
}
a { color: inherit; }
img { display: block; max-width: 100%; }
.shell { width: min(calc(100% - 40px), var(--shell)); margin-inline: auto; }
.skip-link { position: fixed; left: 16px; top: -80px; z-index: 100; padding: 10px 16px; background: var(--ink); color: #fff; }
.skip-link:focus { top: 16px; }
.topline { background: var(--ink); color: rgba(255,255,255,.86); font-size: .875rem; }
.topline__inner { min-height: 36px; display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.topline a { color: #fff; text-decoration: none; }
.site-header { position: sticky; top: 0; z-index: 30; background: rgba(255,255,255,.94); border-bottom: 1px solid rgba(219,230,233,.82); backdrop-filter: blur(16px); }
.nav-wrap { min-height: 82px; display: flex; align-items: center; gap: 32px; }
.brand { display: flex; align-items: center; gap: 10px; min-width: 190px; text-decoration: none; }
.brand img { width: 58px; height: 48px; object-fit: contain; }
.brand span, .brand strong, .brand small { display: block; }
.brand strong { font-size: 1rem; letter-spacing: .08em; }
.brand small { margin-top: -2px; color: #6b7c86; font-size: .62rem; font-weight: 800; letter-spacing: .08em; }
.desktop-nav { display: flex; align-items: center; gap: 30px; margin-left: auto; }
.desktop-nav a { text-decoration: none; color: #38505f; font-weight: 700; }
.desktop-nav a:hover { color: var(--teal); }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 52px; padding: 0 24px; border: 0; border-radius: 999px; background: var(--teal); color: #fff; font-weight: 800; text-decoration: none; box-shadow: 0 10px 28px rgba(8,123,120,.22); transition: .22s ease; }
.button:hover { transform: translateY(-2px); background: var(--teal-dark); }
.button--small { min-height: 44px; padding-inline: 20px; }
.hero { position: relative; overflow: hidden; padding: clamp(56px, 7vw, 92px) 0 80px; background: linear-gradient(125deg, #f4fbfc 0%, #fff 58%); }
.hero::before { content: ""; position: absolute; width: 420px; height: 420px; border: 80px solid rgba(8,123,120,.055); border-radius: 50%; left: -230px; top: -100px; }
.hero__grid { position: relative; display: grid; grid-template-columns: .92fr 1.08fr; align-items: center; gap: clamp(44px, 6vw, 84px); }
.eyebrow { margin: 0 0 14px; color: var(--teal); font-size: .875rem; font-weight: 900; letter-spacing: .16em; text-transform: uppercase; }
h1 { max-width: 680px; margin: 0; font-size: clamp(2.7rem, 5.4vw, 5rem); line-height: 1.12; letter-spacing: -.045em; }
.hero__lead { max-width: 610px; margin: 28px 0 0; color: var(--muted); font-size: 1.125rem; line-height: 1.85; }
.hero__actions { display: flex; flex-wrap: wrap; align-items: center; gap: 22px; margin-top: 34px; }
.text-link { color: var(--ink); font-weight: 800; text-decoration-color: rgba(20,43,58,.3); text-underline-offset: 6px; }
.trust-list { display: flex; flex-wrap: wrap; gap: 24px; margin: 30px 0 0; padding: 0; list-style: none; color: #3e5968; font-weight: 700; }
.trust-list li::before { content: "✓"; display: inline-grid; place-items: center; width: 22px; height: 22px; margin-right: 8px; border-radius: 50%; background: var(--sky); color: var(--teal); font-size: .78rem; }
.hero__media { position: relative; margin: 0; }
.hero__media::before { content: ""; position: absolute; inset: -14px 14px 14px -14px; border: 1px solid rgba(8,123,120,.26); border-radius: 32px; }
.hero__media img { position: relative; width: 100%; aspect-ratio: 4 / 4.35; object-fit: cover; border-radius: 32px; box-shadow: var(--shadow); }
.hero__media figcaption { position: absolute; left: -32px; bottom: 34px; width: min(230px, 58%); padding: 18px 20px; border-left: 4px solid var(--red); border-radius: 6px 18px 18px 6px; background: rgba(255,255,255,.94); box-shadow: 0 16px 40px rgba(20,43,58,.16); backdrop-filter: blur(12px); }
.hero__media figcaption span { display: block; color: var(--teal); font-size: .78rem; font-weight: 900; letter-spacing: .12em; }
.hero__media figcaption strong { display: block; margin-top: 3px; font-size: 1.05rem; }
.services { padding: 96px 0; }
.services h2 { margin: 0; font-size: clamp(2rem, 4vw, 3.2rem); line-height: 1.25; letter-spacing: -.03em; }

@media (max-width: 900px) {
  .desktop-nav { display: none; }
  .nav-wrap { min-height: 72px; }
  .nav-wrap > .button { margin-left: auto; }
  .hero__grid { grid-template-columns: 1fr; }
  .hero__copy { max-width: 680px; }
  .hero__media { width: min(680px, 100%); margin-left: auto; }
  .hero__media img { aspect-ratio: 16 / 10; }
}

@media (max-width: 560px) {
  .shell { width: min(calc(100% - 28px), var(--shell)); }
  .topline__inner span { display: none; }
  .topline__inner { justify-content: center; }
  .brand { min-width: 0; gap: 7px; }
  .brand img { width: 48px; height: 42px; }
  .brand strong { font-size: .88rem; }
  .brand small { display: none; }
  .nav-wrap > .button { min-height: 40px; padding-inline: 15px; font-size: .9rem; }
  .hero { padding-top: 48px; }
  h1 { font-size: clamp(2.45rem, 12.5vw, 3.4rem); }
  .hero__lead { font-size: 1.025rem; }
  .hero__actions { align-items: stretch; flex-direction: column; }
  .hero__actions .button { width: 100%; }
  .text-link { text-align: center; }
  .trust-list { gap: 12px 18px; }
  .hero__media::before { inset: -8px 8px 8px -8px; border-radius: 24px; }
  .hero__media img { aspect-ratio: 4 / 4.7; border-radius: 24px; }
  .hero__media figcaption { left: 12px; bottom: 14px; }
}

/* Full experience */
section { scroll-margin-top: 92px; }
h2, h3, p { text-wrap: pretty; }
h2 { margin: 0; font-size: clamp(2rem, 4.2vw, 3.55rem); line-height: 1.22; letter-spacing: -.035em; }
h3 { margin: 0; line-height: 1.35; }
button, input, select, textarea { font: inherit; }
:focus-visible { outline: 3px solid rgba(8, 123, 120, .36); outline-offset: 4px; }

.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 11px;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: #fff;
  cursor: pointer;
}
.menu-toggle span { display: block; width: 100%; height: 2px; margin: 4px 0; border-radius: 2px; background: var(--ink); transition: transform .2s ease, opacity .2s ease; }
.menu-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.menu-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.menu-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }
.mobile-nav { display: none; }

.section-heading {
  display: grid;
  grid-template-columns: 1fr .72fr;
  align-items: end;
  gap: 80px;
  margin-bottom: 54px;
}
.section-heading > p { margin: 0 0 8px; color: var(--muted); font-size: 1.05rem; line-height: 1.85; }

.service-grid {
  display: grid;
  grid-template-columns: 1.14fr 1fr 1fr;
  grid-auto-rows: minmax(220px, auto);
  gap: 18px;
}
.service-card {
  position: relative;
  display: flex;
  flex-direction: column;
  min-width: 0;
  padding: 30px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: #fff;
  transition: transform .25s ease, border-color .25s ease, box-shadow .25s ease;
}
.service-card::after {
  content: "";
  position: absolute;
  width: 110px;
  height: 110px;
  right: -70px;
  bottom: -70px;
  border: 18px solid rgba(8,123,120,.06);
  border-radius: 50%;
}
.service-card:hover { transform: translateY(-5px); border-color: rgba(8,123,120,.35); box-shadow: 0 18px 45px rgba(20,43,58,.09); }
.service-card--featured {
  grid-row: span 2;
  justify-content: flex-end;
  min-height: 460px;
  color: #fff;
  border-color: var(--teal);
  background:
    radial-gradient(circle at 86% 12%, rgba(112, 222, 214, .22), transparent 33%),
    linear-gradient(145deg, #087b78, #075654);
}
.service-card--featured::before {
  content: "";
  position: absolute;
  width: 210px;
  height: 210px;
  left: -100px;
  top: -90px;
  border: 1px solid rgba(255,255,255,.2);
  border-radius: 50%;
  box-shadow: 0 0 0 34px rgba(255,255,255,.035), 0 0 0 68px rgba(255,255,255,.025);
}
.service-card--featured::after { border-color: rgba(255,255,255,.08); }
.service-card:nth-child(4) { grid-column: 2 / 4; }
.service-card__top { position: relative; z-index: 1; display: flex; justify-content: space-between; align-items: center; min-height: 34px; margin-bottom: auto; }
.service-number { color: var(--teal); font-size: .8rem; font-weight: 900; letter-spacing: .12em; }
.service-card--featured .service-number { color: #c5fffa; }
.service-tag { padding: 5px 10px; border: 1px solid rgba(255,255,255,.28); border-radius: 999px; font-size: .72rem; font-weight: 800; letter-spacing: .08em; }
.service-card h3 { position: relative; z-index: 1; margin-top: 34px; font-size: clamp(1.25rem, 2vw, 1.55rem); }
.service-card--featured h3 { font-size: clamp(1.75rem, 2.8vw, 2.35rem); }
.service-card p { position: relative; z-index: 1; margin: 13px 0 0; color: var(--muted); line-height: 1.8; }
.service-card--featured p { color: rgba(255,255,255,.76); }
.service-card a { position: relative; z-index: 1; align-self: flex-start; margin-top: 28px; color: #fff; font-weight: 800; text-decoration: none; }
.service-card a span { margin-left: 6px; }

.support-flow { padding: 98px 0; color: #fff; background: var(--ink); }
.support-flow__grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: clamp(60px, 9vw, 130px); }
.support-flow .eyebrow { color: #78d8d2; }
.support-flow__intro > p:not(.eyebrow) { max-width: 470px; margin: 24px 0 28px; color: rgba(255,255,255,.66); font-size: 1.04rem; }
.text-link--light { color: #fff; text-decoration-color: rgba(255,255,255,.34); }
.flow-list { margin: 0; padding: 0; list-style: none; }
.flow-list li { display: grid; grid-template-columns: 70px 1fr; gap: 22px; padding: 27px 0; border-top: 1px solid rgba(255,255,255,.16); }
.flow-list li:last-child { border-bottom: 1px solid rgba(255,255,255,.16); }
.flow-list > li > span { color: #79d9d3; font-weight: 900; letter-spacing: .1em; }
.flow-list h3 { font-size: 1.25rem; }
.flow-list p { margin: 7px 0 0; color: rgba(255,255,255,.6); }

.oxygen { padding: 112px 0; background: #f5f9fa; }
.oxygen__grid { display: grid; grid-template-columns: 1.03fr .97fr; align-items: center; gap: clamp(56px, 7vw, 96px); }
.oxygen__visual { position: relative; padding: 18px; border: 1px solid var(--line); border-radius: 28px; background: #fff; box-shadow: 0 24px 65px rgba(20,43,58,.1); }
.oxygen__visual::after { content: ""; position: absolute; inset: 18px; border-radius: 17px; box-shadow: inset 0 0 0 1px rgba(20,43,58,.05); pointer-events: none; }
.oxygen__visual img { width: 100%; aspect-ratio: 16 / 10; object-fit: cover; border-radius: 17px; }
.image-label { position: absolute; z-index: 2; left: 36px; top: 36px; padding: 8px 13px; border-radius: 999px; background: rgba(20,43,58,.9); color: #fff; font-size: .78rem; font-weight: 800; backdrop-filter: blur(8px); }
.oxygen__lead { margin: 24px 0 0; color: var(--muted); font-size: 1.04rem; line-height: 1.85; }
.feature-list { margin: 30px 0 34px; padding: 0; list-style: none; border-top: 1px solid var(--line); }
.feature-list li { display: grid; grid-template-columns: minmax(130px, .7fr) 1fr; gap: 26px; padding: 17px 0; border-bottom: 1px solid var(--line); }
.feature-list strong { font-size: .98rem; }
.feature-list span { color: var(--muted); }
.medical-note { margin: 17px 0 0; color: #71818b; font-size: .82rem; }

.about { position: relative; overflow: hidden; padding: 108px 0; background: #fff; }
.about::after { content: "C.TAI"; position: absolute; right: -16px; bottom: -68px; color: rgba(20,43,58,.025); font-family: Georgia, serif; font-size: clamp(8rem, 20vw, 18rem); font-weight: 700; line-height: 1; letter-spacing: -.06em; }
.about__grid { position: relative; z-index: 1; display: grid; grid-template-columns: .78fr 1.22fr; align-items: center; gap: clamp(60px, 10vw, 150px); }
.about__mark { display: grid; place-items: center; min-height: 350px; border-radius: 28px; background: var(--sky); }
.about__mark svg { width: min(62%, 250px); overflow: visible; }
.about__mark svg path:first-child { fill: none; stroke: rgba(227,31,43,.85); stroke-width: 7; }
.about__mark svg path:last-child { fill: none; stroke: var(--ink); stroke-width: 8; stroke-linejoin: bevel; }
.about__content > p:not(.eyebrow) { max-width: 650px; margin: 25px 0 0; color: var(--muted); font-size: 1.05rem; line-height: 1.9; }
.about blockquote { max-width: 650px; margin: 34px 0 0; padding: 23px 26px; border-left: 4px solid var(--red); background: #f8fafb; font-size: 1.1rem; font-weight: 800; }

.contact { padding: 112px 0; background: #eaf6f7; }
.contact__grid { display: grid; grid-template-columns: .78fr 1.22fr; gap: 22px; }
.contact-card, .contact-form { border-radius: 26px; }
.contact-card { display: flex; flex-direction: column; padding: clamp(34px, 5vw, 56px); color: #fff; background: linear-gradient(145deg, #123241, #071f2c); box-shadow: var(--shadow); }
.eyebrow--light { color: #7ee0d9; }
.contact-card > p:not(.eyebrow) { margin: 22px 0 40px; color: rgba(255,255,255,.67); }
.contact-links { display: grid; gap: 12px; margin-top: auto; }
.contact-links a { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 18px 20px; border: 1px solid rgba(255,255,255,.15); border-radius: 14px; background: rgba(255,255,255,.07); text-decoration: none; transition: background .2s ease, border-color .2s ease; }
.contact-links a:hover { border-color: rgba(255,255,255,.3); background: rgba(255,255,255,.12); }
.contact-links span { color: rgba(255,255,255,.56); font-size: .82rem; }
.contact-links strong { text-align: right; }
.contact-form { padding: clamp(32px, 5vw, 54px); background: #fff; box-shadow: 0 24px 65px rgba(20,43,58,.09); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.contact-form label { display: grid; gap: 9px; margin-bottom: 20px; color: #314956; font-size: .9rem; font-weight: 800; }
.contact-form input, .contact-form select, .contact-form textarea { width: 100%; min-height: 52px; padding: 13px 14px; border: 1px solid #cad9dd; border-radius: 10px; color: var(--ink); background: #fff; transition: border-color .2s ease, box-shadow .2s ease; }
.contact-form textarea { min-height: 128px; resize: vertical; }
.contact-form input:focus, .contact-form select:focus, .contact-form textarea:focus { outline: none; border-color: var(--teal); box-shadow: 0 0 0 4px rgba(8,123,120,.11); }
.contact-form.was-validated :invalid { border-color: #c73d48; }
.form-footer { display: flex; align-items: center; justify-content: space-between; gap: 24px; margin-top: 7px; }
.form-footer p { max-width: 280px; margin: 0; color: #74858e; font-size: .8rem; }
.form-footer .button { flex: 0 0 auto; cursor: pointer; }
.form-status { min-height: 28px; margin: 18px 0 0; color: var(--teal-dark); font-weight: 800; }

.footer { padding: 52px 0 48px; border-top: 1px solid var(--line); background: #fff; }
.footer__grid { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 30px; }
.footer__brand { display: flex; align-items: center; gap: 16px; }
.footer__brand img { width: 66px; height: 50px; object-fit: contain; }
.footer__brand strong, .footer__brand span { display: block; }
.footer__brand span { color: var(--muted); font-size: .78rem; letter-spacing: .08em; }
.footer__nav { display: flex; gap: 24px; }
.footer__nav a { color: #536875; font-size: .9rem; font-weight: 700; text-decoration: none; }
.footer__grid > p { grid-column: 1 / -1; margin: 8px 0 0; padding-top: 24px; border-top: 1px solid var(--line); color: #7a8a93; font-size: .8rem; }
.mobile-actions { display: none; }

.js .reveal { opacity: 0; transform: translateY(22px); transition: opacity .7s ease, transform .7s cubic-bezier(.2,.7,.2,1); }
.js .reveal.is-visible { opacity: 1; transform: translateY(0); }
.service-grid .reveal:nth-child(2), .flow-list .reveal:nth-child(2) { transition-delay: .08s; }
.service-grid .reveal:nth-child(3), .flow-list .reveal:nth-child(3) { transition-delay: .16s; }
.service-grid .reveal:nth-child(4) { transition-delay: .24s; }

@media (max-width: 900px) {
  .menu-toggle { display: block; }
  .mobile-nav { position: absolute; top: 100%; left: 20px; right: 20px; padding: 12px; border: 1px solid var(--line); border-radius: 18px; background: #fff; box-shadow: 0 20px 50px rgba(20,43,58,.16); }
  .mobile-nav.is-open { display: grid; }
  .mobile-nav a { padding: 12px 14px; border-radius: 10px; color: #38505f; font-weight: 800; text-decoration: none; }
  .mobile-nav a:hover { background: var(--sky); color: var(--teal-dark); }
  .service-grid { grid-template-columns: 1fr 1fr; }
  .service-card--featured { grid-column: 1 / -1; grid-row: auto; min-height: 330px; }
  .service-card:nth-child(4) { grid-column: auto; }
  .support-flow__grid, .oxygen__grid, .about__grid, .contact__grid { grid-template-columns: 1fr; }
  .support-flow__intro { max-width: 650px; }
  .oxygen__visual { order: 2; }
  .oxygen__content { order: 1; }
  .about__grid { gap: 46px; }
  .about__mark { min-height: 280px; }
  .contact__grid { gap: 16px; }
}

@media (max-width: 680px) {
  body { padding-bottom: 68px; }
  .nav-cta { display: none; }
  .menu-toggle { margin-left: auto; }
  .section-heading { grid-template-columns: 1fr; gap: 22px; }
  .service-grid { grid-template-columns: 1fr; }
  .service-card, .service-card--featured { min-height: 260px; padding: 26px; }
  .service-card--featured, .service-card:nth-child(4) { grid-column: auto; }
  .support-flow, .services, .oxygen, .about, .contact { padding: 78px 0; }
  .support-flow__grid { gap: 50px; }
  .flow-list li { grid-template-columns: 48px 1fr; gap: 13px; }
  .feature-list li { grid-template-columns: 1fr; gap: 3px; }
  .about__mark { min-height: 230px; }
  .form-row { grid-template-columns: 1fr; gap: 0; }
  .form-footer { align-items: stretch; flex-direction: column; }
  .form-footer .button { width: 100%; }
  .footer__grid { grid-template-columns: 1fr; }
  .footer__nav { display: grid; grid-template-columns: 1fr 1fr; gap: 12px 24px; }
  .footer__grid > p { grid-column: auto; }
  .mobile-actions { position: fixed; z-index: 40; left: 0; right: 0; bottom: 0; display: grid; grid-template-columns: 1fr 1fr; min-height: 68px; padding: 8px; background: rgba(255,255,255,.96); border-top: 1px solid var(--line); backdrop-filter: blur(14px); }
  .mobile-actions a { display: grid; place-items: center; border-radius: 10px; color: var(--ink); font-weight: 900; text-decoration: none; }
  .mobile-actions a:last-child { color: #fff; background: var(--teal); }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}