/* ============================================================
   PFAP · Shared Stylesheet
   ============================================================ */

:root {
  /* 主色系 */
  --ink: #0e1e34;
  --ink-deep: #08152a;
  --ink-soft: #1c3553;
  --cream: #f5efe3;
  --cream-soft: #faf6ec;
  --cream-deep: #ebe3d2;
  --accent: #b08a4e;
  --accent-soft: #d4b07a;
  --text: #1a2a40;
  --text-muted: #5a6a82;
  --text-light: #8a98ad;
  --line: rgba(14, 30, 52, 0.12);
  --line-soft: rgba(14, 30, 52, 0.06);

  /* 字體 */
  --font-display: 'Cormorant Garamond', 'Noto Serif TC', serif;
  --font-sans: 'Inter', 'Noto Sans TC', -apple-system, sans-serif;
  --font-cn: 'Noto Sans TC', -apple-system, sans-serif;

  /* 間距 */
  --section-y: clamp(80px, 12vw, 160px);
  --container: 1280px;
  --gutter: clamp(20px, 4vw, 48px);

  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
}

/* ========== Reset & Base ========== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-sans);
  background: var(--cream);
  color: var(--text);
  line-height: 1.65;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; border: none; background: none; color: inherit; }

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

/* ========== Typography ========== */
.eyebrow {
  font-family: var(--font-sans);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--accent);
}
.display {
  font-family: var(--font-display);
  font-weight: 500;
  line-height: 1.05;
  letter-spacing: -0.02em;
}
.section-title {
  font-family: var(--font-display);
  font-size: clamp(36px, 5vw, 64px);
  font-weight: 500;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--ink);
}
.section-title-cn {
  font-family: var(--font-cn);
  font-size: clamp(20px, 2.4vw, 28px);
  font-weight: 500;
  color: var(--ink);
  margin-top: 8px;
  letter-spacing: 0.04em;
}
.section-lead {
  font-family: var(--font-cn);
  font-size: clamp(15px, 1.4vw, 17px);
  color: var(--text-muted);
  line-height: 1.85;
  max-width: 640px;
}
.section-num {
  font-family: var(--font-display);
  font-size: 14px;
  font-style: italic;
  color: var(--accent);
  margin-bottom: 16px;
}

/* ========== Reveal Animation ========== */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 1s var(--ease-out), transform 1s var(--ease-out);
}
.reveal.in {
  opacity: 1;
  transform: translateY(0);
}
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* ========== Section Header ========== */
.section-header {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  margin-bottom: 80px;
  align-items: end;
}
@media (max-width: 880px) {
  .section-header { grid-template-columns: 1fr; gap: 32px; margin-bottom: 56px; }
}

/* ========== Navigation ========== */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 20px var(--gutter);
  background: rgba(245, 239, 227, 0);
  backdrop-filter: blur(0);
  transition: all 0.4s var(--ease-out);
}
.nav.scrolled, .nav.solid {
  background: rgba(245, 239, 227, 0.92);
  backdrop-filter: blur(12px);
  padding: 14px var(--gutter);
  border-bottom: 1px solid var(--line-soft);
}
.nav-inner {
  max-width: var(--container);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--ink);
  display: flex;
  align-items: center;
  gap: 10px;
}
.logo-mark {
  width: 32px;
  height: 32px;
  border: 1.5px solid var(--ink);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0;
  transition: all 0.4s var(--ease-out);
}
.nav.scrolled .logo-mark, .nav.solid .logo-mark {
  background: var(--ink);
  color: var(--cream);
}
.nav-links {
  display: flex;
  gap: 36px;
  align-items: center;
}
.nav-link {
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--ink);
  position: relative;
  padding: 8px 0;
  transition: color 0.3s;
}
.nav-link.active { color: var(--accent); }
.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0;
  width: 0;
  height: 1px;
  background: var(--accent);
  transition: width 0.4s var(--ease-out);
}
.nav-link.active::after { width: 100%; }
.nav-link:hover { color: var(--accent); }
.nav-link:hover::after { width: 100%; }
.nav-cta {
  padding: 10px 20px;
  border: 1px solid var(--ink);
  border-radius: 100px;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.06em;
  transition: all 0.3s var(--ease-out);
}
.nav-cta:hover {
  background: var(--ink);
  color: var(--cream);
}

/* mobile nav */
.nav-toggle {
  display: none;
  width: 24px;
  height: 24px;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
}
.nav-toggle span {
  display: block;
  width: 100%;
  height: 1.5px;
  background: var(--ink);
  transition: all 0.3s;
}
@media (max-width: 880px) {
  .nav-links {
    position: fixed;
    top: 0; right: 0;
    width: 80%;
    max-width: 320px;
    height: 100vh;
    background: var(--cream);
    flex-direction: column;
    align-items: flex-start;
    gap: 24px;
    padding: 96px 32px 32px;
    transform: translateX(100%);
    transition: transform 0.4s var(--ease-out);
    box-shadow: -8px 0 32px rgba(14,30,52,0.1);
  }
  .nav-links.open { transform: translateX(0); }
  .nav-link { font-size: 16px; }
  .nav-toggle { display: flex; z-index: 102; position: relative; }
  .nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav-toggle.open span:nth-child(2) { opacity: 0; }
  .nav-toggle.open span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }
}

/* ========== Buttons ========== */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 18px 32px;
  background: var(--cream);
  color: var(--ink);
  border-radius: 100px;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.04em;
  transition: all 0.4s var(--ease-out);
}
.btn-primary:hover {
  background: var(--accent-soft);
  transform: translateY(-2px);
}
.btn-primary .arrow {
  transition: transform 0.4s var(--ease-out);
}
.btn-primary:hover .arrow { transform: translateX(4px); }
.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 18px 32px;
  border: 1px solid rgba(245, 239, 227, 0.3);
  color: var(--cream);
  border-radius: 100px;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.04em;
  transition: all 0.4s var(--ease-out);
}
.btn-ghost:hover {
  border-color: var(--accent-soft);
  color: var(--accent-soft);
}
.btn-ink {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 18px 32px;
  background: var(--ink);
  color: var(--cream);
  border-radius: 100px;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.04em;
  transition: all 0.4s var(--ease-out);
}
.btn-ink:hover {
  background: var(--ink-soft);
  transform: translateY(-2px);
}
.btn-ink .arrow { transition: transform 0.4s var(--ease-out); }
.btn-ink:hover .arrow { transform: translateX(4px); }
.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 18px 32px;
  border: 1px solid var(--ink);
  color: var(--ink);
  border-radius: 100px;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.04em;
  transition: all 0.4s var(--ease-out);
}
.btn-outline:hover {
  background: var(--ink);
  color: var(--cream);
}

/* ========== Forms ========== */
.form-row { margin-bottom: 20px; }
.form-label {
  display: block;
  font-size: 12px;
  color: var(--text-muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 8px;
}
.form-input, .form-select {
  width: 100%;
  padding: 14px 16px;
  border: 1px solid var(--line);
  background: var(--cream-soft);
  font-family: var(--font-cn);
  font-size: 15px;
  color: var(--ink);
  border-radius: 2px;
  transition: border-color 0.3s, background 0.3s;
}
.form-input:focus, .form-select:focus {
  outline: none;
  border-color: var(--accent);
  background: var(--cream);
}
.form-submit {
  width: 100%;
  padding: 16px;
  background: var(--ink);
  color: var(--cream);
  border-radius: 100px;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.06em;
  margin-top: 12px;
  transition: all 0.3s var(--ease-out);
}
.form-submit:hover {
  background: var(--ink-soft);
  transform: translateY(-1px);
}
.form-row-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 600px) { .form-row-2 { grid-template-columns: 1fr; } }
textarea.form-input { min-height: 120px; resize: vertical; font-family: var(--font-cn); }

/* ========== Footer ========== */
.footer {
  background: var(--ink-deep);
  color: rgba(245, 239, 227, 0.6);
  padding: 56px 0 32px;
  border-top: 1px solid rgba(245, 239, 227, 0.05);
}
.footer-inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}
@media (max-width: 880px) { .footer-inner { grid-template-columns: 1fr; gap: 32px; } }
.footer-brand {
  font-family: var(--font-display);
  font-size: 24px;
  color: var(--cream);
  margin-bottom: 12px;
  font-weight: 500;
}
.footer-text {
  font-family: var(--font-cn);
  font-size: 13px;
  line-height: 1.8;
}
.footer-h {
  color: var(--cream);
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin-bottom: 16px;
}
.footer-links { list-style: none; }
.footer-links li { margin-bottom: 10px; }
.footer-links a {
  font-size: 13px;
  transition: color 0.3s;
}
.footer-links a:hover { color: var(--accent-soft); }
.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid rgba(245, 239, 227, 0.08);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 12px;
}

/* ========== Scroll Progress ========== */
.scroll-bar {
  position: fixed;
  top: 0; left: 0;
  height: 2px;
  background: var(--accent);
  z-index: 200;
  width: 0%;
  transition: width 0.1s linear;
}

/* ========== Sub-page Hero ========== */
.subhero {
  background: var(--ink-deep);
  color: var(--cream);
  padding: 200px 0 100px;
  position: relative;
  overflow: hidden;
}
.subhero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 40% at 80% 20%, rgba(176, 138, 78, 0.10), transparent),
    radial-gradient(ellipse 50% 50% at 10% 80%, rgba(28, 53, 83, 0.5), transparent);
  pointer-events: none;
}
.subhero::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(245, 239, 227, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(245, 239, 227, 0.02) 1px, transparent 1px);
  background-size: 80px 80px;
  pointer-events: none;
}
.subhero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: end;
}
@media (max-width: 880px) {
  .subhero { padding: 140px 0 64px; }
  .subhero-inner { grid-template-columns: 1fr; gap: 32px; }
}
.subhero-eyebrow {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--accent-soft);
  margin-bottom: 24px;
}
.subhero-title {
  font-family: var(--font-display);
  font-size: clamp(48px, 7vw, 96px);
  font-weight: 400;
  line-height: 0.95;
  letter-spacing: -0.02em;
  color: var(--cream);
}
.subhero-title em {
  font-style: italic;
  color: var(--accent-soft);
}
.subhero-cn {
  font-family: var(--font-cn);
  font-size: clamp(18px, 2vw, 22px);
  color: rgba(245, 239, 227, 0.85);
  margin-top: 16px;
  letter-spacing: 0.04em;
}
.subhero-lead {
  font-family: var(--font-cn);
  font-size: 16px;
  line-height: 1.9;
  color: rgba(245, 239, 227, 0.7);
}
.subhero-breadcrumb {
  font-size: 12px;
  color: rgba(245, 239, 227, 0.5);
  letter-spacing: 0.08em;
  margin-bottom: 16px;
}
.subhero-breadcrumb a { color: rgba(245, 239, 227, 0.7); }
.subhero-breadcrumb a:hover { color: var(--accent-soft); }

/* ========== Common: Page Section ========== */
.page-section {
  padding: var(--section-y) 0;
}
.page-section.alt { background: var(--cream-soft); }
.page-section.dark { background: var(--ink); color: var(--cream); }
.page-section.dark .section-title,
.page-section.dark .section-title-cn { color: var(--cream); }
.page-section.dark .section-lead { color: rgba(245, 239, 227, 0.7); }

/* ========== Filing Bar (內政部立案橫條,Hero 底部) ========== */
.filing-bar {
  background: var(--ink-deep);
  border-top: 1px solid rgba(245, 239, 227, 0.08);
  color: rgba(245, 239, 227, 0.7);
  padding: 16px 0;
  font-size: 12px;
}
.filing-bar-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
}
.filing-bar-item {
  display: flex;
  align-items: center;
  gap: 12px;
}
.filing-bar-label {
  font-size: 10px;
  letter-spacing: 0.24em;
  color: var(--accent-soft);
  text-transform: uppercase;
}
.filing-bar-value {
  font-family: var(--font-cn);
  color: rgba(245, 239, 227, 0.85);
  letter-spacing: 0.03em;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}