/* ═══════════════════════════════════════════
   臺灣島嶼映象文化創意協會 — 共用樣式
   ═══════════════════════════════════════════ */

/* ── Reset & Variables ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --purple-deep:  #6b4fa0;
  --purple-mid:   #8b6bbf;
  --purple-light: #b99dd6;
  --purple-pale:  #ede8f6;
  --purple-soft:  #f5f0fc;
  --warm-white:   #ffffff;
  --warm-beige:   #faf6f1;
  --page-bg:      #ffffff;
  --warm-sand:    #e8e0d4;
  --text-dark:    #2c2432;
  --text-mid:     #5a4f6a;
  --text-light:   #8b7fa0;
  --accent-gold:  #c9a84c;
  --accent-teal:  #4a9b8e;
  --radius-sm:    4px;
  --radius-md:    7px;
  --radius-lg:    10px;
  --shadow-sm:    0 2px 12px rgba(107,79,160,.08);
  --shadow-md:    0 6px 32px rgba(107,79,160,.13);
  --shadow-lg:    0 16px 60px rgba(107,79,160,.18);
  --transition:   all .3s cubic-bezier(.4,0,.2,1);
  --nav-h:        72px;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Noto Sans TC', sans-serif;
  background: var(--page-bg);
  color: var(--text-dark);
  line-height: 1.8;
  overflow-x: hidden;
  padding: 0;
}

/* ── Nav ── */
nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 5vw;
  height: var(--nav-h);
  background: rgba(253,252,250,.88);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(185,157,214,.18);
  transition: var(--transition);
}
nav.scrolled {
  box-shadow: var(--shadow-sm);
  background: rgba(253,252,250,.97);
}
.nav-logo {
  display: flex; align-items: center; gap: 10px;
  text-decoration: none;
}
.nav-logo-icon {
  height: 42px;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.nav-logo-text { line-height: 1.2; }
.nav-logo-text strong {
  display: block; font-family: 'Noto Serif TC', serif;
  font-size: 13px; color: var(--text-dark); letter-spacing: .05em;
}
.nav-logo-text span { font-size: 10px; color: var(--text-light); letter-spacing: .1em; }
.nav-links {
  display: flex; align-items: center; gap: 32px;
  list-style: none;
}
.nav-links a {
  text-decoration: none; font-size: 14px;
  color: var(--text-mid); letter-spacing: .05em;
  transition: var(--transition); position: relative;
}
.nav-links a::after {
  content: ''; position: absolute; bottom: -3px; left: 0; right: 0;
  height: 1.5px; background: var(--purple-mid);
  transform: scaleX(0); transition: var(--transition);
}
.nav-links a:hover,
.nav-links a.active { color: var(--purple-deep); }
.nav-links a:hover::after,
.nav-links a.active::after { transform: scaleX(1); }
.nav-cta {
  color: var(--text-mid);
  font-size: 13px !important; letter-spacing: .08em;
  transition: var(--transition) !important;
}
.nav-cta:hover { color: var(--purple-deep) !important; transform: none; box-shadow: none; }
.nav-cta::after,
.nav-cta.active::after { display: none !important; }
.hamburger {
  display: none; flex-direction: column; gap: 5px;
  cursor: pointer; padding: 4px; background: none; border: none;
}
.hamburger span {
  display: block; width: 24px; height: 2px;
  background: var(--text-mid); border-radius: 2px; transition: var(--transition);
}
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ── Page Header (每頁頂部 banner) ── */
.page-header {
  padding: calc(var(--nav-h) + 72px) 5vw 72px;
  background: linear-gradient(155deg, var(--purple-soft) 0%, var(--warm-white) 55%, var(--warm-beige) 100%);
  position: relative; overflow: hidden;
}
.page-header-bg {
  position: absolute; border-radius: 50%; pointer-events: none;
  background: radial-gradient(circle, var(--purple-pale) 0%, transparent 70%);
}
.page-header-bg.b1 { width: 500px; height: 500px; top: -200px; right: -80px; opacity: .5; }
.page-header-bg.b2 { width: 300px; height: 300px; bottom: -80px; left: 8%; opacity: .35; }
.page-header-inner { max-width: 1200px; margin: 0 auto; }
.page-breadcrumb {
  font-size: 12px; color: var(--text-light); letter-spacing: .08em;
  margin-bottom: 16px; display: flex; align-items: center; gap: 8px;
}
.page-breadcrumb a { color: var(--text-light); text-decoration: none; transition: var(--transition); }
.page-breadcrumb a:hover { color: var(--purple-mid); }
.page-breadcrumb span { color: var(--purple-light); }
.page-tag {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--purple-pale); color: var(--purple-deep);
  padding: 6px 16px; border-radius: 100px; font-size: 12px;
  letter-spacing: .1em; margin-bottom: 20px;
  border: 1px solid rgba(107,79,160,.15);
}
.page-title {
  font-family: 'Noto Serif TC', serif;
  font-size: clamp(30px, 4vw, 52px);
  font-weight: 600; line-height: 1.4;
  color: var(--text-dark); margin-bottom: 20px;
  letter-spacing: .03em;
}
.page-title em { font-style: normal; color: var(--purple-deep); }
.page-desc {
  font-size: 16px; color: var(--text-mid);
  line-height: 2; max-width: 560px;
}

/* ── Section & Layout ── */
section { padding: 80px 5vw; }
.section-inner { max-width: 1200px; margin: 0 auto; }
.section-tag {
  display: inline-flex; align-items: center; gap: 8px;
  color: var(--purple-mid); font-size: 12px; letter-spacing: .15em;
  text-transform: uppercase; margin-bottom: 14px;
}
.section-tag::before {
  content: ''; display: inline-block;
  width: 24px; height: 1.5px; background: var(--purple-light);
}
.section-title {
  font-family: 'Noto Serif TC', serif;
  font-size: clamp(24px, 3vw, 40px);
  font-weight: 600; line-height: 1.45;
  color: var(--text-dark); margin-bottom: 16px;
}
.section-desc { font-size: 16px; color: var(--text-mid); line-height: 2; max-width: 580px; }
.divider {
  width: 48px; height: 3px;
  background: linear-gradient(90deg, var(--purple-mid), var(--purple-light));
  border-radius: 2px; margin: 10px 0 24px;
}
.divider.center { margin-left: auto; margin-right: auto; }

/* ── Buttons ── */
.btn-primary {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--purple-deep); color: #fff;
  padding: 13px 30px; border-radius: 100px;
  font-size: 15px; text-decoration: none; letter-spacing: .06em;
  transition: var(--transition); box-shadow: 0 4px 20px rgba(107,79,160,.28);
}
.btn-primary:hover { background: var(--purple-mid); transform: translateY(-2px); box-shadow: 0 8px 32px rgba(107,79,160,.36); }
.btn-secondary {
  display: inline-flex; align-items: center; gap: 8px;
  background: transparent; color: var(--purple-deep);
  padding: 12px 28px; border-radius: 100px;
  font-size: 15px; text-decoration: none; letter-spacing: .06em;
  border: 1.5px solid var(--purple-light); transition: var(--transition);
}
.btn-secondary:hover { background: var(--purple-pale); transform: translateY(-2px); }
.btn-white {
  display: inline-flex; align-items: center; gap: 10px;
  background: #fff; color: var(--purple-deep);
  padding: 14px 34px; border-radius: 100px;
  font-size: 15px; text-decoration: none; letter-spacing: .06em;
  font-weight: 600; transition: var(--transition);
  box-shadow: 0 4px 20px rgba(0,0,0,.18);
}
.btn-white:hover { transform: translateY(-2px); box-shadow: 0 8px 32px rgba(0,0,0,.26); }
.btn-outline-white {
  display: inline-flex; align-items: center; gap: 10px;
  background: transparent; color: #fff;
  padding: 13px 34px; border-radius: 100px;
  font-size: 15px; text-decoration: none; letter-spacing: .06em;
  border: 1.5px solid rgba(255,255,255,.5); transition: var(--transition);
}
.btn-outline-white:hover { background: rgba(255,255,255,.12); transform: translateY(-2px); }

/* ── Card base ── */
.card {
  background: #fff; border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm); transition: var(--transition);
  border: 1px solid rgba(185,157,214,.12);
}
.card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); }

/* ── Footer ── */
footer {
  background: var(--text-dark); color: rgba(255,255,255,.5);
  padding: 64px 5vw 40px;
}
.footer-inner {
  max-width: 1200px; margin: 0 auto;
  display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 48px;
  padding-bottom: 40px; border-bottom: 1px solid rgba(255,255,255,.08);
}
.footer-logo strong {
  display: block; font-family: 'Noto Serif TC', serif;
  font-size: 15px; color: #fff; letter-spacing: .05em; margin-bottom: 4px;
}
.footer-logo span { font-size: 11px; color: rgba(255,255,255,.35); letter-spacing: .1em; }
.footer-desc { font-size: 13px; line-height: 1.9; margin-top: 16px; }
.footer-col h4 { font-size: 13px; color: #fff; letter-spacing: .1em; margin-bottom: 18px; }
.footer-col ul { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.footer-col a { font-size: 13px; color: rgba(255,255,255,.42); text-decoration: none; transition: var(--transition); }
.footer-col a:hover { color: rgba(255,255,255,.9); }
.footer-bottom {
  max-width: 1200px; margin: 24px auto 0;
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: 12px; font-size: 12px;
}

/* ── Scroll Reveal (disabled) ── */
.reveal, .reveal-left, .reveal-right,
.reveal.visible, .reveal-left.visible, .reveal-right.visible {
  opacity: 1; transform: none; transition: none;
}

/* ── Responsive ── */
@media (max-width: 1024px) {
  .footer-inner { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  section { padding: 56px 5vw; }
  .nav-links {
    display: none; flex-direction: column; gap: 0;
    position: fixed; top: var(--nav-h); right: 0; left: auto;
    width: 44vw; min-width: 180px;
    background: rgba(253,252,250,.97); backdrop-filter: blur(16px);
    padding: 4px 20px 8px;
    border-bottom: 1px solid var(--warm-sand);
    border-left: 1px solid var(--warm-sand);
    border-radius: 0 0 0 var(--radius-md);
    box-shadow: -4px 12px 32px rgba(107,79,160,.12);
  }
  .nav-links.open { display: flex; }
  .nav-links li { width: 100%; }
  .nav-links a { display: block; padding: 7px 0; font-size: 14px; border-bottom: 1px solid rgba(232,224,212,.6); }
  .nav-links a::after { display: none; }
  .nav-cta { padding: 7px 0 !important; }
  .hamburger { display: flex; }
  .footer-inner { grid-template-columns: 1fr; gap: 32px; }
  .page-header { padding: calc(var(--nav-h) + 48px) 5vw 52px; }
}
@media (max-width: 480px) {
  .footer-bottom { flex-direction: column; text-align: center; }
}

/* ── Back to Top Button ── */
#back-to-top {
  position: fixed;
  bottom: 36px;
  right: 36px;
  z-index: 99;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--purple-deep);
  color: #fff;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 20px rgba(107,79,160,.35);
  opacity: 0;
  transform: translateY(12px);
  transition: opacity .3s ease, transform .3s ease, background .2s ease;
  pointer-events: none;
}
#back-to-top.visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}
#back-to-top:hover {
  background: var(--purple-mid);
  box-shadow: 0 8px 28px rgba(107,79,160,.45);
  transform: translateY(-3px);
}
#back-to-top svg {
  width: 20px;
  height: 20px;
  stroke: #fff;
  fill: none;
  stroke-width: 2.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}
@media (max-width: 480px) {
  #back-to-top { bottom: 24px; right: 20px; width: 42px; height: 42px; }
}

/* ── Nav clearance for first section (after page-header removed) ── */
.mission,
.services-main,
.ways {
  padding-top: calc(var(--nav-h) + 64px) !important;
}
@media (max-width: 768px) {
  .mission,
  .services-main,
  .ways {
    padding-top: calc(var(--nav-h) + 24px) !important;
  }
}