/* ===== 設計變數 ===== */
:root {
  --teal-900: #0b3d3a;
  --teal-700: #0f766e;
  --teal-500: #14b8a6;
  --teal-100: #d1faf4;
  --teal-50: #f0fdfa;
  --ink: #1a2b32;
  --ink-soft: #4a5d63;
  --line: #e2ece9;
  --white: #ffffff;
  --bg: #fbfdfc;
  --shadow: 0 10px 40px -12px rgba(15, 118, 110, 0.25);
  --radius: 18px;
  --max: 1120px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: 'Noto Sans TC', system-ui, -apple-system, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

.container {
  width: 100%;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px;
}
.container--narrow { max-width: 760px; }

/* ===== 導覽列 ===== */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 900;
  font-size: 1.25rem;
  color: var(--teal-900);
  text-decoration: none;
}
.brand__mark {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  background: var(--teal-500);
  color: #fff;
  border-radius: 9px;
  font-weight: 900;
}
.nav__links { display: flex; align-items: center; gap: 28px; }
.nav__links a {
  color: var(--ink-soft);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  transition: color 0.2s;
}
.nav__links a:hover { color: var(--teal-700); }
.nav__cta {
  background: var(--teal-700);
  color: #fff !important;
  padding: 9px 18px;
  border-radius: 999px;
}
.nav__cta:hover { background: var(--teal-900); }
.nav__toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--teal-900);
}

/* ===== 主視覺 ===== */
.hero {
  background: linear-gradient(160deg, var(--teal-50) 0%, #fff 60%);
  padding: 72px 0 88px;
  overflow: hidden;
}
.hero__inner {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}
.hero__eyebrow {
  color: var(--teal-700);
  font-weight: 700;
  letter-spacing: 0.05em;
  margin-bottom: 16px;
}
.hero h1 {
  font-size: clamp(2rem, 5vw, 3.2rem);
  line-height: 1.25;
  font-weight: 900;
  color: var(--teal-900);
  margin-bottom: 20px;
}
.hero__lead {
  font-size: 1.1rem;
  color: var(--ink-soft);
  max-width: 520px;
  margin-bottom: 32px;
}
.hero__actions { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 40px; }
.hero__stats { display: flex; gap: 36px; list-style: none; flex-wrap: wrap; }
.hero__stats strong {
  display: block;
  font-size: 1.4rem;
  color: var(--teal-700);
  font-weight: 900;
}
.hero__stats span { font-size: 0.85rem; color: var(--ink-soft); }

.hero__visual { position: relative; display: grid; place-items: center; min-height: 320px; }
.blob {
  position: absolute;
  width: 340px;
  height: 340px;
  background: radial-gradient(circle, var(--teal-500), var(--teal-700));
  border-radius: 48% 52% 56% 44% / 52% 48% 52% 48%;
  filter: blur(2px);
  opacity: 0.92;
  animation: morph 12s ease-in-out infinite;
}
@keyframes morph {
  0%, 100% { border-radius: 48% 52% 56% 44% / 52% 48% 52% 48%; }
  50% { border-radius: 56% 44% 48% 52% / 44% 56% 44% 56%; }
}
.hero__card {
  position: relative;
  background: #fff;
  padding: 24px 28px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  text-align: center;
  font-weight: 700;
  color: var(--teal-900);
}
.hero__card-icon { font-size: 2.4rem; display: block; margin-bottom: 8px; }
.hero__card small { font-weight: 400; color: var(--ink-soft); font-size: 0.85rem; }

/* ===== 按鈕 ===== */
.btn {
  display: inline-block;
  padding: 13px 28px;
  border-radius: 999px;
  font-weight: 700;
  text-decoration: none;
  transition: transform 0.15s, box-shadow 0.2s, background 0.2s;
  cursor: pointer;
}
.btn:hover { transform: translateY(-2px); }
.btn--primary { background: var(--teal-700); color: #fff; box-shadow: var(--shadow); }
.btn--primary:hover { background: var(--teal-900); }
.btn--ghost { background: #fff; color: var(--teal-700); border: 2px solid var(--teal-500); }
.btn--lg { padding: 16px 40px; font-size: 1.1rem; margin-top: 12px; }

/* ===== 區塊通用 ===== */
.section { padding: 84px 0; }
.section--tint { background: var(--teal-50); }
.section__eyebrow {
  color: var(--teal-500);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.85rem;
  margin-bottom: 10px;
}
.section__title {
  font-size: clamp(1.6rem, 3.5vw, 2.3rem);
  font-weight: 900;
  color: var(--teal-900);
  margin-bottom: 16px;
  line-height: 1.35;
}
.section__sub { color: var(--ink-soft); margin-bottom: 36px; }

/* ===== 關於 ===== */
.about__grid { display: grid; grid-template-columns: 1fr; gap: 40px; margin-top: 24px; }
.about__lead { font-size: 1.12rem; color: var(--ink-soft); max-width: 760px; }
.about__cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 32px 26px;
  transition: transform 0.2s, box-shadow 0.2s;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.card__icon { font-size: 2.2rem; display: block; margin-bottom: 14px; }
.card h3 { color: var(--teal-900); margin-bottom: 8px; font-size: 1.2rem; }
.card p { color: var(--ink-soft); }

/* ===== 服務 ===== */
.services { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.service {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 30px 24px;
  position: relative;
  transition: transform 0.2s, box-shadow 0.2s;
}
.service:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.service--featured { border-color: var(--teal-500); box-shadow: var(--shadow); }
.service__tag {
  display: inline-block;
  background: var(--teal-100);
  color: var(--teal-700);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 999px;
  margin-bottom: 14px;
}
.service h3 { color: var(--teal-900); margin-bottom: 10px; font-size: 1.15rem; }
.service p { color: var(--ink-soft); font-size: 0.95rem; }

/* ===== 團隊 ===== */
.team { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.member {
  text-align: center;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 32px 20px;
}
.member__avatar {
  font-size: 2.6rem;
  width: 84px;
  height: 84px;
  margin: 0 auto 16px;
  display: grid;
  place-items: center;
  background: var(--teal-50);
  border-radius: 50%;
}
.member h3 { color: var(--teal-900); font-size: 1.05rem; margin-bottom: 8px; }
.member p { color: var(--ink-soft); font-size: 0.92rem; }
.member small { color: #b08; }

/* ===== 流程 ===== */
.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
  list-style: none;
}
.step {
  background: #fff;
  border-radius: var(--radius);
  padding: 30px 24px;
  position: relative;
  border: 1px solid var(--line);
}
.step__num {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  background: var(--teal-700);
  color: #fff;
  border-radius: 50%;
  font-weight: 900;
  font-size: 1.2rem;
  margin-bottom: 16px;
}
.step h3 { color: var(--teal-900); margin-bottom: 8px; font-size: 1.1rem; }
.step p { color: var(--ink-soft); font-size: 0.95rem; }

/* ===== FAQ ===== */
.faq { margin-top: 28px; }
.faq details {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 4px 22px;
  margin-bottom: 14px;
  transition: box-shadow 0.2s;
}
.faq details[open] { box-shadow: var(--shadow); }
.faq summary {
  cursor: pointer;
  font-weight: 700;
  color: var(--teal-900);
  padding: 16px 0;
  list-style: none;
  position: relative;
  padding-right: 30px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: '＋';
  position: absolute;
  right: 0;
  color: var(--teal-500);
  font-weight: 900;
  transition: transform 0.2s;
}
.faq details[open] summary::after { transform: rotate(45deg); }
.faq details p { color: var(--ink-soft); padding-bottom: 18px; }

/* ===== CTA ===== */
.section--cta {
  background: linear-gradient(160deg, var(--teal-700), var(--teal-900));
  color: #fff;
  text-align: center;
}
.cta__title { font-size: clamp(1.8rem, 4vw, 2.6rem); font-weight: 900; margin-bottom: 14px; }
.cta__sub { color: rgba(255, 255, 255, 0.85); font-size: 1.1rem; margin-bottom: 48px; }
.contact {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 44px;
  text-align: left;
}
.contact__item {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: var(--radius);
  padding: 26px 24px;
}
.contact__item span { font-weight: 700; display: block; margin-bottom: 8px; }
.contact__item p { color: rgba(255, 255, 255, 0.9); }
.contact__item small { color: rgba(255, 255, 255, 0.55); }
.section--cta .btn--primary { background: #fff; color: var(--teal-900); }
.section--cta .btn--primary:hover { background: var(--teal-50); }

/* ===== 頁尾 ===== */
.footer { background: var(--teal-900); color: rgba(255, 255, 255, 0.7); padding: 48px 0; }
.footer__inner { display: flex; justify-content: space-between; align-items: flex-end; gap: 24px; flex-wrap: wrap; }
.brand--footer { color: #fff; font-size: 1.1rem; }
.footer__note { font-size: 0.85rem; max-width: 520px; margin-top: 12px; line-height: 1.6; }
.footer__copy { font-size: 0.85rem; }

/* ===== 響應式 ===== */
@media (max-width: 880px) {
  .nav__links {
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    gap: 0;
    padding: 12px 24px 20px;
    border-bottom: 1px solid var(--line);
    box-shadow: var(--shadow);
    display: none;
  }
  .nav__links.is-open { display: flex; }
  .nav__links a { padding: 12px 0; width: 100%; }
  .nav__cta { text-align: center; margin-top: 8px; }
  .nav__toggle { display: block; }
  .hero__inner { grid-template-columns: 1fr; }
  .hero__visual { min-height: 240px; order: -1; }
  .about__cards,
  .services,
  .team,
  .steps,
  .contact { grid-template-columns: 1fr; }
}
@media (max-width: 600px) {
  .section { padding: 56px 0; }
  .hero { padding: 48px 0 64px; }
  .hero__stats { gap: 24px; }
}