/* =========================================================
   chen0813 / LUCKY — Design Tokens
   ========================================================= */
:root {
  --color-cream: #f2ede3;
  --color-cream-deep: #ded2b6;
  --color-navy: #1b2b27;
  --color-hero-from: #23342f;
  --color-hero-to: #384d45;
  --color-green-deep: #16241e;
  --color-olive: #a9bd85;
  --color-olive-deep: #8ea86a;
  --color-text-dark: #26302a;
  --color-text-muted: #6b6a5e;
  --color-text-light: #f4f1e6;
  --color-line: rgba(38, 48, 42, 0.14);
  --color-line-light: rgba(244, 241, 230, 0.22);

  --font-serif: "Noto Serif TC", "Songti TC", serif;
  --font-sans: "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", sans-serif;

  --container: 1180px;
  --gap: clamp(1.25rem, 3vw, 3rem);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--color-text-dark);
  background: var(--color-cream);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4 { font-family: var(--font-serif); font-weight: 500; margin: 0; }
p { margin: 0; }
button { font-family: inherit; cursor: pointer; }

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 clamp(1.25rem, 4vw, 3rem);
}

.eyebrow {
  font-size: 0.72rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--color-olive-deep);
  font-weight: 600;
}
.eyebrow.on-dark { color: var(--color-olive); }

/* =========================================================
   NAV
   ========================================================= */
.site-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.6rem clamp(1.25rem, 4vw, 3rem);
  transition: background 0.4s ease, padding 0.3s ease, box-shadow .3s ease;
}
.site-nav.scrolled {
  background: rgba(22, 36, 30, 0.92);
  padding-top: 1rem;
  padding-bottom: 1rem;
  box-shadow: 0 8px 24px rgba(0,0,0,0.15);
  backdrop-filter: blur(6px);
}
.site-nav .logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-serif);
  font-size: 1.3rem;
  letter-spacing: 0.12em;
  color: var(--color-text-light);
}
.site-nav .logo img { height: 28px; width: auto; }
.nav-links {
  display: flex;
  gap: clamp(1.2rem, 3vw, 2.6rem);
  list-style: none;
  margin: 0; 
  padding: 20px 0 0 0;
}
.nav-links a {
  font-size: 0.95rem;
  letter-spacing: 0.06em;
  color: var(--color-text-light);
  opacity: 0.85;
  position: relative;
  padding-bottom: 4px;
}
.nav-links a:hover { opacity: 1; }
.nav-links a::after {
  content: "";
  position: absolute; left: 0; right: 0; bottom: 0;
  height: 1px; background: var(--color-olive);
  transform: scaleX(0); transform-origin: left;
  transition: transform .3s ease;
}
.nav-links a:hover::after { transform: scaleX(1); }
.nav-toggle { display: none; }

/* =========================================================
   HERO
   ========================================================= */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  color: var(--color-text-light);
  overflow: hidden;
  background: linear-gradient(180deg, var(--color-hero-from), var(--color-hero-to));
}
.hero-slides {
  position: absolute; inset: 0;
}
.hero-slide {
  position: absolute; inset: 0;
  background-size: cover;
  background-position: center;
  opacity: 0;
  transform: scale(1.08);
  transition: opacity 1.4s ease;
}
.hero-slide.active {
  opacity: 0.55;
}
.hero-scrim {
  position: absolute; inset: 0;
  background: linear-gradient(115deg, rgba(20,32,28,0.92) 20%, rgba(20,32,28,0.35) 62%, rgba(20,32,28,0.05) 100%),
              linear-gradient(0deg, rgba(15,24,21,0.85) 0%, rgba(15,24,21,0.1) 45%);
}
.hero-inner {
  position: relative;
  z-index: 2;
  padding: 0 clamp(1.25rem, 4vw, 3rem) 6.5rem;
  max-width: var(--container);
  margin: 0 auto;
  width: 100%;
}
.hero-tagline {
  font-size: 0.72rem;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--color-text-light);
  opacity: 0.7;
  margin-bottom: 1.4rem;
}
.hero-title {
  font-size: clamp(2.3rem, 5.4vw, 4.2rem);
  line-height: 1.28;
  font-weight: 500;
  max-width: 14ch;
  opacity: 0;
  transform: translateY(24px);
  animation: heroRise 1s ease .2s forwards;
}
.hero-desc {
  margin-top: 1.6rem;
  max-width: 34ch;
  font-size: 0.95rem;
  color: var(--color-text-light);
  opacity: 0;
  transform: translateY(18px);
  animation: heroRise 1s ease .5s forwards;
}
.hero-cta {
  margin-top: 2.2rem;
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.85rem;
  letter-spacing: 0.04em;
  color: var(--color-text-light);
  border-bottom: 1px solid var(--color-line-light);
  padding-bottom: 6px;
  opacity: 0;
  animation: heroRise 1s ease .8s forwards;
}
.hero-cta svg { width: 16px; height: 16px; transition: transform .3s ease; }
.hero-cta:hover svg { transform: translateX(5px); }
@keyframes heroRise {
  to { opacity: 1; transform: translateY(0); }
}
.hero-meta {
  position: absolute;
  right: clamp(1.25rem, 4vw, 3rem);
  top: 2rem;
  z-index: 2;
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  color: var(--color-text-light);
  opacity: 0.55;
}
.scroll-cue {
  position: absolute;
  left: clamp(1.25rem, 4vw, 3rem);
  bottom: 1.6rem;
  z-index: 2;
  font-size: 0.68rem;
  letter-spacing: 0.24em;
  color: var(--color-text-light);
  opacity: 0.6;
  display: flex; align-items: center; gap: 0.6rem;
}
.scroll-cue::after {
  content: "";
  width: 1px; height: 28px;
  background: var(--color-line-light);
  animation: scrollLine 1.8s ease-in-out infinite;
}
@keyframes scrollLine { 0%,100% { transform: scaleY(1); opacity:.6;} 50%{ transform: scaleY(.4); opacity:1;} }

/* ---------- 輪播圓點 (參照原案：右下邊細框內的短線指示器) ---------- */
.hero-dots {
  position: absolute;
  right: clamp(1.25rem, 4vw, 3rem);
  bottom: clamp(4.6rem, 11vw, 7rem);
  z-index: 3;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0.8rem 1rem;

  background: rgba(15, 24, 21, 0.18);
  backdrop-filter: blur(2px);
}
.hero-dot {
  width: 18px;
  height: 3px;
  padding: 0;
  border: none;
  background: rgba(244, 241, 230, 0.4);
  cursor: pointer;
  transition: background .35s ease, width .35s ease, opacity .35s ease;
}
.hero-dot:hover { background: rgba(244, 241, 230, 0.7); }
.hero-dot.active {
  width: 30px;
  background: var(--color-olive);
}
@media (max-width: 640px) {
  .hero-dots {
    bottom: 4.2rem;
    right: 1.1rem;
    padding: 0.55rem 0.75rem;
    gap: 7px;
  }
  .hero-dot { width: 13px; }
  .hero-dot.active { width: 22px; }
}

/* =========================================================
   ABOUT
   ========================================================= */
.about {
  background: var(--color-cream);
  padding: clamp(4rem, 10vw, 8rem) 0;
}
.about .container {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: var(--gap);
  align-items: center;
}
.about-crumb {
  grid-column: 1 / -1;
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  color: var(--color-text-muted);
  display: flex;
  gap: 0.6rem;
  margin-bottom: clamp(2rem, 6vw, 4rem);
  text-transform: uppercase;
}
.about-img-wrap {
  position: relative;
  overflow: hidden;
  opacity: 0;
  transform: translateX(-40px);
  transition: opacity .9s ease, transform .9s ease;
}
.about-img-wrap.in-view { opacity: 1; transform: translateX(0); }
.about-img-wrap img { width: 100%; height: 640px; object-fit: cover; }
.about-img-index {
  position: absolute; top: 1.2rem; left: 1.2rem;
  color: var(--color-text-light);
  font-size: 0.75rem; letter-spacing: 0.1em;
}
.about-text {
  opacity: 0;
  transform: translateX(40px);
  transition: opacity .9s ease .15s, transform .9s ease .15s;
}
.about-text.in-view { opacity: 1; transform: translateX(0); }
.about-text .eyebrow { margin-bottom: 1rem; }
.about-title {
  font-size: clamp(1.9rem, 3.4vw, 2.7rem);
  line-height: 1.35;
  margin-bottom: 1.6rem;
}
.about-desc {
  color: var(--color-text-muted);
  font-size: 0.96rem;
  max-width: 46ch;
  margin-bottom: 1.8rem;
}
.about-quote {
  font-family: var(--font-serif);
  font-size: 0.95rem;
  color: var(--color-text-dark);
  padding-top: 1.4rem;
  border-top: 1px solid var(--color-line);
  display: inline-block;
}

/* =========================================================
   PRODUCTS / EXPERTISE
   ========================================================= */
.expertise {
  background: var(--color-green-deep);
  color: var(--color-text-light);
  padding: clamp(4rem, 10vw, 8rem) 0;
}
.expertise-head {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: var(--gap);
  align-items: end;
  margin-bottom: clamp(2.6rem, 6vw, 4rem);
}
.expertise-title {
  font-size: clamp(2rem, 3.6vw, 3rem);
  line-height: 1.3;
  margin-top: 0.8rem;
}
.expertise-title .accent { color: var(--color-olive); }
.expertise-desc {
  color: var(--color-line-light);
  font-size: 0.92rem;
  max-width: 40ch;
  border-left: 1px solid var(--color-line-light);
  padding-left: 1.4rem;
}
.expertise-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.6rem;
}
.expertise-card {
  opacity: 0;
  transform: translateY(36px);
  transition: opacity .8s ease, transform .8s ease;
}
.expertise-card.in-view { opacity: 1; transform: translateY(0); }
.expertise-card:nth-child(2) { transition-delay: .12s; }
.expertise-card:nth-child(3) { transition-delay: .24s; }
.expertise-card-media {
  position: relative;
  overflow: hidden;
  height: 340px;
  margin-bottom: 1.2rem;
}
.expertise-card-media img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform .6s ease;
}
.expertise-card:hover .expertise-card-media img { transform: scale(1.06); }
.expertise-card-index {
  position: absolute; top: 1rem; left: 1rem;
  font-size: 0.75rem; letter-spacing: 0.08em;
  color: var(--color-text-light);
}
.expertise-card-arrow {
  position: absolute; bottom: 1rem; right: 1rem;
  width: 34px; height: 34px;
  border-radius: 50%;
  border: 1px solid var(--color-line-light);
  background: transparent;
  padding: 0;
  display: flex; align-items: center; justify-content: center;
  color: var(--color-text-light);
  cursor: pointer;
  transition: background .3s ease, border-color .3s ease;
}
.expertise-card:hover .expertise-card-arrow { background: var(--color-olive); border-color: var(--color-olive); }
.expertise-card-arrow svg { width: 14px; height: 14px; }
.expertise-card h3 { font-size: 1.2rem; margin-bottom: 0.5rem; }
.expertise-card p { font-size: 0.85rem; color: var(--color-line-light); max-width: 32ch; }

/* =========================================================
   SERVICES (accordion)
   ========================================================= */
.services {
  background: var(--color-cream);
  padding: clamp(4rem, 10vw, 8rem) 0;
}
.services .container {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: var(--gap);
}
.services-head .eyebrow { margin-bottom: 1rem; }
.services-title {
  font-size: clamp(1.9rem, 3.4vw, 2.6rem);
  line-height: 1.35;
}
.services-title .accent { color: var(--color-olive-deep); }
.services-desc {
  margin-top: 1.4rem;
  color: var(--color-text-muted);
  font-size: 0.92rem;
  max-width: 30ch;
}
.accordion-item {
  border-bottom: 1px solid var(--color-line);
  opacity: 0;
  transform: translateY(20px);
  transition: opacity .6s ease, transform .6s ease;
}
.accordion-item.in-view { opacity: 1; transform: translateY(0); }
.accordion-item:first-child { border-top: 1px solid var(--color-line); }
.accordion-trigger {
  width: 100%;
  background: none;
  border: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.5rem 0.2rem;
  text-align: left;
  font-family: var(--font-serif);
  font-size: 1.25rem;
  color: var(--color-text-dark);
}
.accordion-trigger .num {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin-right: 1rem;
}
.accordion-icon {
  flex: none;
  width: 26px; height: 26px;
  border-radius: 50%;
  border: 1px solid var(--color-line);
  position: relative;
}
.accordion-icon::before, .accordion-icon::after {
  content: "";
  position: absolute; top: 50%; left: 50%;
  background: var(--color-text-dark);
  transform: translate(-50%, -50%);
}
.accordion-icon::before { width: 10px; height: 1px; }
.accordion-icon::after { width: 1px; height: 10px; transition: transform .3s ease; }
.accordion-item.active .accordion-icon::after { transform: translate(-50%, -50%) rotate(90deg) scaleY(0); }
.accordion-item.active .accordion-trigger { color: var(--color-olive-deep); }
.accordion-panel {
  max-height: 0;
  overflow: hidden;
  transition: max-height .45s ease;
}
.accordion-panel-inner {
  padding: 0 0.2rem 1.6rem 0.2rem;
  color: var(--color-text-muted);
  font-size: 0.92rem;
  max-width: 62ch;
}
.accordion-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 0.9rem;
  font-size: 0.82rem;
  color: var(--color-olive-deep);
  border-bottom: 1px solid currentColor;
  padding-bottom: 2px;
}

/* =========================================================
   LIGHTBOX (services CTA button)
   ========================================================= */
.lightbox-trigger {
  cursor: pointer;
  font-family: inherit;
}
.accordion-link.lightbox-trigger {
  background: none;
  border: none;
}
.lightbox-overlay {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: clamp(1rem, 4vw, 3rem);
  background: rgba(15, 24, 21, 0.72);
  backdrop-filter: blur(4px);
  opacity: 0;
  visibility: hidden;
  transition: opacity .35s ease, visibility .35s ease;
}
.lightbox-overlay.open {
  opacity: 1;
  visibility: visible;
}
.lightbox-dialog {
  position: relative;
  width: 100%;
  max-width: 980px;
  max-height: 82vh;
  background: var(--color-cream);
  display: grid;
  grid-template-columns: 1fr 1fr;
  overflow: hidden;
  box-shadow: 0 40px 90px rgba(0,0,0,0.4);
  transform: translateY(24px) scale(0.98);
  opacity: 0;
  transition: transform .4s ease, opacity .4s ease;
}
.lightbox-overlay.open .lightbox-dialog {
  transform: translateY(0) scale(1);
  opacity: 1;
}
.lightbox-media {
  position: relative;
  height: 100%;
  min-height: 320px;
  overflow: hidden;
}
.lightbox-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  position: absolute;
  inset: 0;
}
.lightbox-body {
  padding: clamp(1.8rem, 4vw, 3.2rem);
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.lightbox-body .eyebrow { margin-bottom: 0.9rem; }
.lightbox-body h3 {
  font-size: clamp(1.4rem, 2.6vw, 1.9rem);
  line-height: 1.35;
  margin-bottom: 1.1rem;
}
.lightbox-body p#lightboxContent {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  line-height: 1.85;
}
.lightbox-close {
  position: absolute;
  top: 1rem; right: 1rem;
  z-index: 2;
  width: 38px; height: 38px;
  border-radius: 50%;
  border: 1px solid var(--color-line);
  background: rgba(242,237,227,0.9);
  display: flex; align-items: center; justify-content: center;
  color: var(--color-text-dark);
  transition: background .25s ease, transform .25s ease;
}
.lightbox-close:hover { background: var(--color-olive); transform: rotate(90deg); }
@media (max-width: 760px) {
  .lightbox-dialog { grid-template-columns: 1fr; max-height: 88vh; overflow-y: auto; }
  .lightbox-media { min-height: 220px; }
}

/* =========================================================
   CONTACT
   ========================================================= */
.contact {
  background: linear-gradient(160deg, var(--color-cream-deep), var(--color-cream) 60%);
  padding: clamp(4.5rem, 11vw, 9rem) 0 clamp(3rem, 8vw, 6rem);
}
.contact .container {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: var(--gap);
}
.contact-title {
  font-size: clamp(2.2rem, 4.2vw, 3.4rem);
  line-height: 1.3;
}
.contact-title .accent { color: var(--color-olive-deep); }
.contact-quote {
  margin-top: 2rem;
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 0.9rem;
  color: var(--color-text-muted);
  max-width: 26ch;
  padding-top: 1.4rem;
  border-top: 1px solid var(--color-line);
}
.contact-form {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.4rem 1.6rem;
}
.form-field { display: flex; flex-direction: column; gap: 0.5rem; }
.form-field.full { grid-column: 1 / -1; }
.form-field label {
  font-size: 0.9rem;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
  text-transform: uppercase;
}
.form-field input,
.form-field textarea {
  border: none;
  border-bottom: 1px solid var(--color-line);
  background: transparent;
  padding: 0.6rem 0.1rem;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  color: var(--color-text-dark);
  outline: none;
  transition: border-color .3s ease;
}
.form-field input:focus,
.form-field textarea:focus { border-color: var(--color-olive-deep); }
.form-field textarea { resize: vertical; min-height: 90px; }
.captcha-row { display: flex; align-items: center; gap: 0.9rem; }
.captcha-row img { border: 1px solid var(--color-line); border-radius: 4px; cursor: pointer; }
.captcha-row input { max-width: 130px; letter-spacing: 0.2em; }
.captcha-refresh {
  font-size: 0.85rem;
  color: #D2691E;
  border-bottom: 1px dashed var(--color-text-muted);
}
.form-submit {
  grid-column: 1 / -1;
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  justify-self: start;
  margin-top: 0.6rem;
  padding: 0.95rem 2.2rem;
  background: var(--color-green-deep);
  color: var(--color-text-light);
  border: none;
  font-size: 0.88rem;
  letter-spacing: 0.05em;
  transition: background .3s ease, transform .3s ease;
}
.form-submit:hover { background: var(--color-olive-deep); transform: translateX(3px); }
.form-msg { grid-column: 1/-1; font-size: 0.85rem; padding: 0.8rem 1rem; }
.form-msg.success { background: rgba(142,168,106,0.18); color: #4c5f37; }
.form-msg.error { background: rgba(190,80,60,0.12); color: #9c3b26; }

/* =========================================================
   FOOTER
   ========================================================= */
.site-footer {
  background: var(--color-cream-deep);
  padding: 3.4rem 0 1.6rem;
}
.footer-top {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr 0.8fr 0.8fr;
  gap: 2rem;
  padding-bottom: 2.4rem;
  border-bottom: 1px solid rgba(38,48,42,0.16);
}
.footer-logo {
  display: flex; align-items: center; gap: 0.6rem;
  font-family: var(--font-serif); font-size: 1.2rem; letter-spacing: 0.1em;
  margin-bottom: 0.9rem;
}
.footer-logo img { height: 24px; }
.footer-desc { font-size: 0.85rem; color: var(--color-text-muted); max-width: 32ch; }
.footer-col h4 { font-size: 0.75rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--color-text-muted); margin-bottom: 1rem; }
.footer-col a, .footer-col p { display: block; font-size: 0.85rem; margin-bottom: 0.55rem; color: var(--color-text-dark); }
.footer-col a:hover { color: var(--color-olive-deep); }
.footer-bottom {
  display: flex; justify-content: space-between; align-items: center;
  padding-top: 1.4rem;
  font-size: 0.76rem;
  color: var(--color-text-muted);
  flex-wrap: wrap; gap: 0.6rem;
}

/* =========================================================
   GO-TO-TOP BUTTON
   ========================================================= */
.go-top {
  position: fixed;
  right: clamp(1.1rem, 3vw, 2rem);
  bottom: clamp(1.1rem, 3vw, 2rem);
  z-index: 90;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  border: 1px solid rgba(244,241,230,0.25);
  background: var(--color-green-deep);
  color: var(--color-text-light);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 10px 26px rgba(0,0,0,0.22);
  opacity: 0;
  visibility: hidden;
  transform: translateY(14px);
  transition: opacity .3s ease, transform .3s ease, visibility .3s ease, background .3s ease;
}
.go-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.go-top:hover {
  background: var(--color-olive-deep);
  color: var(--color-navy);
}
@media (max-width: 640px) {
  .go-top { width: 42px; height: 42px; }
}

/* =========================================================
   RESPONSIVE
   ========================================================= */
@media (max-width: 900px) {
  .about .container,
  .expertise-head,
  .services .container,
  .contact .container { grid-template-columns: 1fr; }
  .expertise-grid { grid-template-columns: 1fr; }
  .contact-form { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr 1fr; }
  .about-img-wrap img { height: 380px; }
}
@media (max-width: 640px) {
  .nav-links {
    position: fixed; inset: 0 0 0 auto;
    width: 78vw; max-width: 320px;
    background: var(--color-green-deep);
    flex-direction: column;
    padding: 6rem 2rem 2rem;
    transform: translateX(100%);
    transition: transform .35s ease;
  }
  .nav-links.open { transform: translateX(0); }
  .nav-toggle {
    display: flex; flex-direction: column; gap: 5px;
    background: none; border: none; z-index: 110;
  }
  .nav-toggle span { width: 22px; height: 1px; background: var(--color-text-light); }
  .footer-top { grid-template-columns: 1fr; }
  .expertise-head { align-items: start; }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}

/* Focus visibility */
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible {
  outline: 2px solid var(--color-olive-deep);
  outline-offset: 2px;
}