/* ============================================================
   Tiffany — 共用樣式表 (全站)
   設計系統:Tiffany Blue 主色,青春活力、面向未來
   ============================================================ */

:root {
  --color-primary: #0abab5;          /* Tiffany blue */
  --color-primary-dark: #07857f;
  --color-primary-light: #5fd6d1;
  --color-accent: #ffb547;           /* 暖色點綴 */
  --color-ink: #1f2a2a;
  --color-muted: #5c6b6b;
  --color-bg: #ffffff;
  --color-bg-soft: #f3fbfa;
  --color-border: #dceeed;

  --container: 1140px;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 12px 30px rgba(10, 186, 181, 0.12);
  --shadow-sm: 0 6px 16px rgba(31, 42, 42, 0.08);

  --font: "Segoe UI", "PingFang TC", "Microsoft JhengHei", system-ui, sans-serif;

  --space: clamp(3rem, 7vw, 6rem);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  color: var(--color-ink);
  background: var(--color-bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

/* ---------- 版面容器 ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: clamp(1.25rem, 5vw, 2.5rem);
}

.section { padding-block: var(--space); }
.section--soft { background: var(--color-bg-soft); }

.eyebrow {
  display: inline-block;
  font-size: .8rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  font-weight: 700;
  color: var(--color-primary-dark);
  margin-bottom: .75rem;
}

.section__head { max-width: 640px; margin-bottom: 3rem; }
.section__head--center { margin-inline: auto; text-align: center; }

h1, h2, h3 { line-height: 1.2; font-weight: 800; letter-spacing: -.01em; }
h2 { font-size: clamp(1.8rem, 4vw, 2.6rem); }
h3 { font-size: 1.25rem; }
.lead { font-size: clamp(1.05rem, 2vw, 1.2rem); color: var(--color-muted); }

/* ---------- 按鈕 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5em;
  padding: .7em 1.6em;
  border-radius: 999px;
  font-weight: 700;
  font-size: 1rem;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform .15s ease, box-shadow .15s ease, background .15s ease;
}
.btn:hover { transform: translateY(-2px); }
.btn--primary { background: var(--color-primary); color: #fff; box-shadow: var(--shadow); }
.btn--primary:hover { background: var(--color-primary-dark); }
.btn--ghost { border-color: currentColor; color: var(--color-primary-dark); }
.btn--ghost:hover { background: var(--color-primary); color: #fff; border-color: var(--color-primary); }
.btn--light { background: #fff; color: var(--color-primary-dark); }

.btn-row { display: flex; flex-wrap: wrap; gap: 1rem; }

/* ---------- Header / Nav ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, .9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 1rem;
}
.brand { display: flex; align-items: center; gap: .55rem; font-weight: 800; font-size: 1.35rem; }
.brand__mark {
  width: 38px; height: 38px;
  display: grid; place-items: center;
  border-radius: 12px;
  background: var(--color-primary);
  color: #fff; font-weight: 800;
}
.brand span { color: var(--color-primary-dark); }

.nav__links { display: flex; align-items: center; gap: 1.75rem; list-style: none; }
.nav__links a { font-weight: 600; color: var(--color-muted); transition: color .15s; }
.nav__links a:hover, .nav__links a.is-active { color: var(--color-primary-dark); }

.nav__toggle {
  display: none;
  background: none; border: none;
  font-size: 1.6rem; cursor: pointer; color: var(--color-primary-dark);
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  color: #fff;
  background: linear-gradient(120deg, rgba(7,133,127,.82), rgba(10,186,181,.6)), url("../images2/hero-bg.png") center/cover no-repeat;
}
.hero__inner {
  padding-block: clamp(4rem, 12vw, 8rem);
  max-width: 680px;
}
.hero h1 { font-size: clamp(2.2rem, 6vw, 4rem); margin-bottom: 1.1rem; }
.hero p { font-size: clamp(1.05rem, 2.4vw, 1.3rem); margin-bottom: 2rem; opacity: .95; }
.hero .btn--ghost { color: #fff; }

.page-hero {
  background: linear-gradient(120deg, var(--color-primary-dark), var(--color-primary));
  color: #fff;
}
.page-hero__inner { padding-block: clamp(3rem, 8vw, 5rem); max-width: 720px; }
.page-hero h1 { font-size: clamp(2rem, 5vw, 3rem); margin-bottom: .75rem; }
.page-hero p { opacity: .95; font-size: 1.1rem; }

/* ---------- 卡片網格 ---------- */
.grid { display: grid; gap: 1.5rem; }
.grid--3 { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.grid--2 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }

.card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 2rem;
  box-shadow: var(--shadow-sm);
  transition: transform .18s ease, box-shadow .18s ease;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.card__icon {
  width: 54px; height: 54px;
  display: grid; place-items: center;
  border-radius: 14px;
  background: var(--color-bg-soft);
  font-size: 1.6rem;
  margin-bottom: 1.1rem;
}
.card h3 { margin-bottom: .5rem; }
.card p { color: var(--color-muted); }

/* ---------- 圖文並排 ---------- */
.split { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: clamp(2rem, 5vw, 4rem); align-items: center; }
.split__media img { border-radius: var(--radius); box-shadow: var(--shadow); }
.split ul { list-style: none; margin-top: 1.25rem; display: grid; gap: .75rem; }
.split li { padding-left: 1.8rem; position: relative; color: var(--color-muted); }
.split li::before { content: "✓"; position: absolute; left: 0; color: var(--color-primary); font-weight: 800; }

/* ---------- 統計數字 ---------- */
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 1.5rem; text-align: center; }
.stat__num { font-size: clamp(2rem, 5vw, 3rem); font-weight: 800; color: var(--color-primary-dark); }
.stat__label { color: var(--color-muted); font-weight: 600; }

/* ---------- CTA 區 ---------- */
.cta {
  color: #fff;
  text-align: center;
  border-radius: var(--radius);
  padding: clamp(2.5rem, 6vw, 4rem);
  background: linear-gradient(120deg, rgba(7,133,127,.9), rgba(10,186,181,.78)), url("../images2/cta-bg.png") center/cover no-repeat;
}
.cta h2 { margin-bottom: 1rem; }
.cta p { max-width: 540px; margin: 0 auto 2rem; opacity: .95; }
.cta .btn-row { justify-content: center; }

/* ---------- 表單 ---------- */
.form { display: grid; gap: 1.1rem; max-width: 560px; }
.form label { font-weight: 600; display: grid; gap: .4rem; }
.form input, .form textarea, .form select {
  font: inherit;
  padding: .85em 1em;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: #fff;
}
.form input:focus, .form textarea:focus, .form select:focus { outline: 2px solid var(--color-primary-light); border-color: var(--color-primary); }
.info-list { list-style: none; display: grid; gap: 1.25rem; }
.info-list li { display: flex; gap: .85rem; align-items: flex-start; }
.info-list .ico { font-size: 1.3rem; }

/* ---------- 時間軸 ---------- */
.timeline { display: grid; gap: 1.5rem; max-width: 720px; }
.timeline__item { display: grid; grid-template-columns: auto 1fr; gap: 1.25rem; align-items: start; }
.timeline__year { font-weight: 800; color: var(--color-primary-dark); min-width: 64px; }
.timeline__body { padding-bottom: 1.25rem; border-bottom: 1px dashed var(--color-border); }

/* ---------- Footer ---------- */
.site-footer { background: var(--color-ink); color: #cfe6e4; padding-block: 3rem 2rem; margin-top: 0; }
.footer-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 2rem; }
.site-footer h4 { color: #fff; margin-bottom: 1rem; font-size: 1rem; }
.site-footer a { color: #cfe6e4; opacity: .85; }
.site-footer a:hover { opacity: 1; color: var(--color-primary-light); }
.site-footer ul { list-style: none; display: grid; gap: .55rem; }
.footer-bottom { margin-top: 2.5rem; padding-top: 1.5rem; border-top: 1px solid rgba(255,255,255,.12); text-align: center; font-size: .9rem; opacity: .7; }

/* ---------- RWD ---------- */
@media (max-width: 760px) {
  .nav__toggle { display: block; }
  .nav__links {
    position: absolute;
    top: 100%; left: 0; right: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: .25rem;
    background: #fff;
    padding: 1rem clamp(1.25rem, 5vw, 2.5rem) 1.5rem;
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
    display: none;
  }
  .nav__links.is-open { display: flex; }
  .nav__links a { padding: .5rem 0; width: 100%; }
}