/* ============================================================
   Project HERO 雙語公益故事書 — 溫潤紙感繪本 × 一道光
   零依賴靜態樣式表。淺/深色雙票皆通過 WCAG AA。
   ============================================================ */

/* ---------- Design tokens：淺色（預設） ---------- */
:root {
  --bg: #F7F2E9;
  --surface: #FFFDF8;
  --surface-2: #FBF5EA;
  --ink: #33302B;
  --ink-soft: #6B655B;
  --primary: #A6531F;          /* 深化的暖陶土橙：白字/文字皆達 WCAG AA（約 5.3:1 on surface） */
  --primary-soft: #F0DCC4;
  --pill-ink: #8A4419;          /* 膠囊標籤文字（on primary-soft 約 5:1，小字達 AA） */
  --accent: #3E7C6A;
  --accent-2: #C9527A;
  --highlight: #F4B740;
  --line: #E4DBCB;
  --nav-h: 66px;

  --shadow-card: 0 10px 30px rgba(51, 48, 43, .06);
  --shadow-card-h: 0 18px 44px rgba(51, 48, 43, .12);
  --shadow-cta: 0 8px 20px color-mix(in srgb, var(--primary) 28%, transparent);

  --radius: 18px;
  --radius-sm: 12px;
  --maxw: 1120px;
  --section-gap: clamp(4rem, 9vw, 7rem);

  --font-display: "Fraunces", "Noto Serif TC", Georgia, serif;
  --font-serif: "Noto Serif TC", "Songti TC", serif;
  --font-body: "Noto Sans TC", -apple-system, "PingFang TC", "Microsoft JhengHei", sans-serif;
  --font-round: "Baloo 2", "Noto Sans TC", sans-serif;

  --paper-opacity: .05;
  color-scheme: light;
}

/* ---------- Design tokens：深色 ---------- */
:root[data-theme="dark"] {
  --bg: #211E1A;
  --surface: #2B2722;
  --surface-2: #322D27;
  --ink: #F2EADC;
  --ink-soft: #B6AC9B;
  --primary: #E8A35C;
  --primary-soft: #4A3B2A;
  --pill-ink: #F4C56B;          /* 深色膠囊標籤文字（on primary-soft 暗底，高對比） */
  --accent: #7FC3AC;
  --accent-2: #E87CA0;
  --highlight: #F4B740;
  --line: #3D372F;

  --shadow-card: 0 12px 34px rgba(0, 0, 0, .35);
  --shadow-card-h: 0 20px 50px rgba(0, 0, 0, .5);
  --shadow-cta: 0 8px 22px color-mix(in srgb, var(--primary) 34%, transparent);
  --paper-opacity: .035;
  color-scheme: dark;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #211E1A; --surface: #2B2722; --surface-2: #322D27;
    --ink: #F2EADC; --ink-soft: #B6AC9B; --primary: #E8A35C; --primary-soft: #4A3B2A;
    --pill-ink: #F4C56B;
    --accent: #7FC3AC; --accent-2: #E87CA0; --highlight: #F4B740; --line: #3D372F;
    --shadow-card: 0 12px 34px rgba(0, 0, 0, .35);
    --shadow-card-h: 0 20px 50px rgba(0, 0, 0, .5);
    --shadow-cta: 0 8px 22px color-mix(in srgb, var(--primary) 34%, transparent);
    --paper-opacity: .035; color-scheme: dark;
  }
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.85;
  color: var(--ink);
  background: var(--bg);
  hanging-punctuation: allow-end;
  transition: background-color .35s ease, color .35s ease;
  overflow-x: hidden;
}
:lang(en) { line-height: 1.7; }
img, svg { max-width: 100%; }
a { color: var(--accent); text-underline-offset: .18em; text-decoration-thickness: 1.5px; }
a:hover { color: var(--primary); }
h1, h2, h3 { font-family: var(--font-serif); font-weight: 700; line-height: 1.18; color: var(--ink); margin: 0; letter-spacing: .015em; }
p { margin: 0 0 1.1em; }
::selection { background: color-mix(in srgb, var(--highlight) 55%, transparent); color: var(--ink); }

/* 紙張纖維紋理（鋪滿整頁、純 SVG 濾鏡，不擋互動） */
body::before {
  content: ""; position: fixed; inset: 0; z-index: 0; pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='220' height='220'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  opacity: var(--paper-opacity);
  mix-blend-mode: multiply;
}
:root[data-theme="dark"] body::before { mix-blend-mode: screen; }

/* ---------- Layout helpers ---------- */
.wrap { width: min(100% - 2.5rem, var(--maxw)); margin-inline: auto; }
.section { position: relative; z-index: 1; padding-block: var(--section-gap); }
.section-head { max-width: 46rem; margin: 0 auto clamp(2rem, 4vw, 3rem); text-align: center; }
.section-head.left { text-align: left; margin-inline: 0; }
.eyebrow {
  font-family: var(--font-display); font-style: italic; font-weight: 500;
  font-size: 1.05rem; color: var(--ink-soft); margin: 0 0 .4rem; letter-spacing: .01em;
}
.section-title { font-size: clamp(1.8rem, 4vw, 2.6rem); position: relative; display: inline-block; text-wrap: balance; }
.section-title::after {
  content: ""; display: block; width: 56px; height: 5px; margin: .7rem auto 0;
  border-radius: 8px 14px 6px 12px; background: var(--primary);
}
.section-head.left .section-title::after { margin-inline: 0; }
.section.alt-accent .section-title::after { background: var(--accent); }
.section.alt-accent2 .section-title::after { background: var(--accent-2); }
.lead { font-size: 1.12rem; color: var(--ink-soft); max-width: 44rem; margin-inline: auto; text-wrap: pretty; }

/* ---------- Skip link ---------- */
.skip {
  position: absolute; left: 50%; transform: translateX(-50%) translateY(-150%);
  top: .5rem; z-index: 200; background: var(--primary); color: #fff;
  padding: .6rem 1.1rem; border-radius: 999px; font-weight: 700; transition: transform .2s;
}
.skip:focus { transform: translateX(-50%) translateY(0); color: #fff; }

/* ---------- Language span mechanism ---------- */
.le { display: none; }
:root[data-lang="en"] .lz { display: none; }
:root[data-lang="en"] .le { display: inline; }

/* ---------- Keyboard focus (WCAG 2.4.7) ---------- */
a:focus-visible,
button:focus-visible,
.btn:focus-visible,
.seg button:focus-visible,
.icon-btn:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
}
:root[data-theme="dark"] a:focus-visible,
:root[data-theme="dark"] button:focus-visible { outline-color: var(--highlight); }

/* ---------- Fine-tuning & bilingual type ---------- */
.btn-ico { width: 18px; height: 18px; flex: none; }
.section.tint { background: color-mix(in srgb, var(--surface) 55%, var(--bg)); }
.quote .lz { font-family: var(--font-serif); font-style: normal; font-weight: 600; }
.quote .le { font-family: var(--font-display); font-style: italic; font-weight: 500; }
.quote cite .lz { font-family: var(--font-body); }
.quote cite .le { font-family: var(--font-display); font-style: italic; }
.openbook .book-left .big-quote .lz { font-family: var(--font-serif); font-style: normal; font-weight: 700; }
.openbook .book-left .big-quote .le { font-family: var(--font-display); font-style: italic; }
.a-quote .lz { font-family: var(--font-serif); font-style: normal; font-weight: 600; }
.a-quote .le { font-family: var(--font-display); font-style: italic; }
.join-quote .lz { font-family: var(--font-serif); font-style: normal; }
.join-quote .le { font-family: var(--font-display); font-style: italic; }
.hero h1 .lz { font-family: var(--font-serif); }

/* about 大引言出處 */
.openbook .book-left .big-quote-attrib { font-family: var(--font-display); font-style: italic; color: var(--ink-soft); font-size: 1rem; margin: .6rem 0 0; }
.openbook .book-left .big-quote-attrib .lz { font-family: var(--font-serif); font-style: normal; }
/* submission 細則備註與結尾金句 */
.fine-note { font-size: .9rem; line-height: 1.7; color: var(--ink-soft); margin: .7rem 0 0; }
.fine-note.center { text-align: center; max-width: 46rem; margin-inline: auto; }
.submit-closing { font-family: var(--font-serif); font-weight: 600; font-size: clamp(1.1rem, 2.4vw, 1.35rem); color: var(--ink); text-align: center; max-width: 44rem; margin: 1.6rem auto .4rem; line-height: 1.6; }
.submit-closing .le { font-family: var(--font-display); }
/* join 海獅吉祥物與延伸 */
.join-mascot { display: block; width: clamp(110px, 18vw, 152px); height: auto; margin: 0 auto 1rem; filter: drop-shadow(0 10px 18px rgba(51, 48, 43, .16)); }
.lead-sm { font-size: 1.02rem; margin-top: -.4rem; }
.join-report { margin: 0 0 1.4rem; }
.join-report a { display: inline-flex; align-items: center; gap: .4rem; color: var(--accent); text-decoration: none; font-weight: 600; font-size: .95rem; }
.join-report a:hover { color: var(--primary); }
/* 宣傳短片內嵌（直式 Short 9:16 / 一般 16:9） */
.promo-video { max-width: 320px; margin: 1.6rem auto 0; text-align: center; }
.promo-video .video-frame { position: relative; width: 100%; border-radius: 18px; overflow: hidden; border: 1px solid var(--line); box-shadow: 0 16px 40px rgba(51, 48, 43, .18); background: #000; }
.promo-video .video-frame::before { content: ""; display: block; padding-top: 56.25%; }
.promo-video .video-frame.short::before { padding-top: 177.78%; }
.promo-video .video-frame iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.promo-video .video-cap { margin-top: .75rem; font-size: .92rem; line-height: 1.6; color: var(--ink-soft); }
/* 公益大使「更多鬱兔」 */
.a-more { display: inline-flex; align-items: center; gap: .35rem; margin-top: 1rem; color: var(--accent); text-decoration: none; font-weight: 600; }
.a-more:hover { color: var(--primary); }

/* ============================================================
   Navbar
   ============================================================ */
.nav {
  position: fixed; inset: 0 0 auto 0; z-index: 100; height: var(--nav-h);
  display: flex; align-items: center; transition: height .3s ease, background-color .3s ease, box-shadow .3s ease, border-color .3s ease;
  border-bottom: 1px solid transparent;
}
.nav.scrolled {
  --nav-h: 56px;
  height: var(--nav-h);
  background: color-mix(in srgb, var(--surface) 82%, transparent);
  backdrop-filter: blur(10px) saturate(1.05);
  -webkit-backdrop-filter: blur(10px) saturate(1.05);
  border-bottom: 1px solid var(--line);
  box-shadow: 0 6px 20px rgba(51, 48, 43, .08);
}
.nav .wrap { display: flex; align-items: center; gap: 1rem; width: min(100% - 2rem, var(--maxw)); }
.brand { display: inline-flex; align-items: center; text-decoration: none; flex: none; }
.brand-logo { height: 46px; width: auto; display: block; transition: height .3s ease; }
.nav.scrolled .brand-logo { height: 38px; }
/* 吉祥物（海獅）導覽圖——圓形裁切，不需底板 */
.brand-mascot { width: 46px; height: 46px; border-radius: 50%; object-fit: cover;
  filter: drop-shadow(0 2px 6px rgba(51, 48, 43, .18)); flex: none; }
.nav.scrolled .brand-mascot { width: 38px; height: 38px; }
/* 深淺色都用藍色版 LOGO（logo-藍色版.jpg）；深色模式加淺色底板維持可讀；吉祥物不加底板 */
:root[data-theme="dark"] .brand-logo:not(.brand-mascot),
:root[data-theme="dark"] .footer-logo { background: #FFFDF8; padding: 4px 9px; border-radius: 11px; box-shadow: 0 2px 10px rgba(0, 0, 0, .3); }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .brand-logo:not(.brand-mascot),
  :root:not([data-theme="light"]) .footer-logo { background: #FFFDF8; padding: 4px 9px; border-radius: 11px; box-shadow: 0 2px 10px rgba(0, 0, 0, .3); }
}
.nav-links { display: flex; align-items: center; gap: .2rem; margin-left: auto; }
.nav-links a {
  position: relative; color: var(--ink-soft); text-decoration: none; font-size: .96rem;
  font-weight: 500; padding: .45rem .7rem; border-radius: 8px;
}
.nav-links a::after {
  content: ""; position: absolute; left: .7rem; right: .7rem; bottom: .26rem; height: 3px;
  background: var(--highlight); border-radius: 8px 14px 6px; transform: scaleX(0); transform-origin: left;
  transition: transform .28s ease;
}
.nav-links a:hover, .nav-links a:focus-visible { color: var(--ink); }
.nav-links a:hover::after, .nav-links a:focus-visible::after, .nav-links a.active::after { transform: scaleX(1); }
.nav-links a.active { color: var(--ink); }

.nav-tools { display: flex; align-items: center; gap: .5rem; }
.seg {
  display: inline-flex; align-items: center; background: var(--surface-2);
  border: 1px solid var(--line); border-radius: 999px; padding: 2px;
}
.seg button {
  font: 600 .85rem/1 var(--font-body); border: 0; background: transparent; color: var(--ink-soft);
  padding: .34rem .62rem; border-radius: 999px; cursor: pointer; min-width: 38px; transition: background-color .2s, color .2s;
}
.seg button[aria-pressed="true"] { background: var(--primary); color: #fff; }
:root[data-theme="dark"] .seg button[aria-pressed="true"] { color: #211E1A; }

.icon-btn {
  display: inline-grid; place-items: center; width: 38px; height: 38px; border-radius: 999px;
  background: var(--surface-2); border: 1px solid var(--line); color: var(--ink); cursor: pointer; transition: transform .2s, background-color .2s;
}
.icon-btn:hover { transform: translateY(-1px); }
.icon-btn svg { width: 20px; height: 20px; }
:root[data-theme="dark"] .moon { display: none; }
:root:not([data-theme="dark"]) .sun { display: none; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .moon { display: none; } :root:not([data-theme="light"]) .sun { display: inline; } }

.btn {
  display: inline-flex; align-items: center; gap: .5rem; font: 700 1rem/1 var(--font-body);
  text-decoration: none; cursor: pointer; border: 0; border-radius: 999px;
  padding: .72rem 1.5rem; transition: transform .2s ease, box-shadow .25s ease, background-color .2s;
  position: relative; overflow: hidden;
}
.btn-primary { background: var(--primary); color: #fff; box-shadow: var(--shadow-cta); }
:root[data-theme="dark"] .btn-primary { color: #211E1A; }
.btn-primary::before {
  content: ""; position: absolute; inset: 0; transform: translateX(-120%);
  background: linear-gradient(100deg, transparent, color-mix(in srgb, var(--highlight) 60%, transparent), transparent);
  transition: transform .6s ease;
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 28px color-mix(in srgb, var(--primary) 38%, transparent); color: #fff; }
:root[data-theme="dark"] .btn-primary:hover { color: #211E1A; }
.btn-primary:hover::before { transform: translateX(120%); }
.btn-primary:active { transform: scale(.98); }
.btn-ghost { background: transparent; color: var(--primary); border: 1.5px solid var(--primary); }
.btn-ghost:hover { background: var(--primary-soft); color: var(--primary); transform: translateY(-2px); }
.btn-sm { padding: .5rem 1.05rem; font-size: .92rem; }
.nav .btn { flex: none; }

/* hamburger */
.hamburger { display: none; }

/* ============================================================
   Hero
   ============================================================ */
.hero { position: relative; z-index: 1; padding-top: clamp(7rem, 14vh, 10rem); padding-bottom: clamp(3rem, 6vw, 5rem); overflow: hidden; }
.hero-glow {
  position: absolute; left: 50%; top: 34%; width: min(120vw, 1100px); aspect-ratio: 1; transform: translate(-50%, -50%);
  background: radial-gradient(circle at center, color-mix(in srgb, var(--highlight) 42%, transparent) 0%, transparent 60%);
  pointer-events: none; z-index: -1; animation: breathe 8s ease-in-out infinite;
}
:root[data-theme="dark"] .hero-glow { mix-blend-mode: screen; background: radial-gradient(circle at center, color-mix(in srgb, var(--highlight) 30%, transparent) 0%, transparent 62%); }
@keyframes breathe { 0%, 100% { opacity: .8; transform: translate(-50%, -50%) scale(1); } 50% { opacity: 1; transform: translate(-50%, -50%) scale(1.05); } }
.hero-inner { text-align: center; max-width: 52rem; margin-inline: auto; }
.hero-poster { margin: 0 auto 1.9rem; max-width: min(640px, 94%); }
.cover-img {
  display: block; width: 100%; height: auto; border-radius: 16px; background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: 0 22px 54px rgba(51, 48, 43, .2), 0 4px 12px rgba(51, 48, 43, .08);
  transform: rotate(-1deg); transition: transform .4s ease, box-shadow .4s ease;
}
.cover-img:hover { transform: rotate(0deg) translateY(-3px); box-shadow: 0 28px 64px rgba(51, 48, 43, .26); }
.hero-eyebrow {
  display: inline-block; font-family: var(--font-display); font-style: italic; font-weight: 500;
  color: var(--primary); font-size: clamp(1rem, 2.4vw, 1.18rem); margin-bottom: .9rem; letter-spacing: .01em;
}
.hero h1 { font-family: var(--font-serif); font-weight: 700; font-size: clamp(2.4rem, 6.4vw, 4.2rem); line-height: 1.14; letter-spacing: .02em; margin: 0 0 .2rem; }
.hero h1 .en-title { font-family: var(--font-display); font-style: italic; font-weight: 500; }
.hero-sub { font-size: clamp(1.05rem, 2.4vw, 1.3rem); color: var(--ink-soft); max-width: 38rem; margin: 1.1rem auto 1.8rem; line-height: 1.7; }
.hero-cta { display: flex; gap: .9rem; justify-content: center; flex-wrap: wrap; }

.hero-stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; max-width: 60rem; margin: clamp(2.6rem, 5vw, 4rem) auto 0; }
.stat { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.1rem .8rem; text-align: center; box-shadow: var(--shadow-card); }
.stat .num { font-family: var(--font-round); font-weight: 700; font-size: clamp(1.4rem, 3vw, 1.9rem); color: var(--primary); line-height: 1.1; }
.stat .label { font-size: .9rem; color: var(--ink-soft); margin-top: .25rem; }

.scroll-cue { display: flex; justify-content: center; margin-top: 2.4rem; color: var(--ink-soft); }
.scroll-cue svg { width: 26px; height: 26px; animation: bob 2.2s ease-in-out infinite; }
@keyframes bob { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(6px); } }

/* ============================================================
   Generic content blocks
   ============================================================ */
.prose { max-width: 40rem; }
.prose p { color: var(--ink); text-wrap: pretty; }
:lang(en).prose, .prose :lang(en) { max-width: 64ch; }

.quote {
  position: relative; margin: 1.6rem 0; padding: 1.2rem 1.4rem 1.2rem 1.7rem;
  border-left: 4px solid var(--highlight); background: color-mix(in srgb, var(--highlight) 9%, transparent);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}
.quote p { font-family: var(--font-serif); font-size: 1.2rem; color: var(--ink); margin: 0; font-weight: 600; }
.quote cite { display: block; margin-top: .5rem; font-style: normal; font-size: .92rem; color: var(--ink-soft); font-family: var(--font-display); }

.callout {
  display: flex; align-items: center; gap: .7rem; margin: 1.4rem 0;
  font-family: var(--font-serif); font-weight: 700; font-size: clamp(1.15rem, 2.6vw, 1.5rem);
  color: var(--primary); justify-content: center; text-align: center;
}
.callout .ico { width: 28px; height: 28px; flex: none; color: var(--accent); }

.signature { font-family: var(--font-display); font-style: italic; color: var(--ink-soft); text-align: right; margin-top: 1.2rem; }

/* about: open-book layout */
.openbook { display: grid; grid-template-columns: .85fr 1.15fr; gap: clamp(1.5rem, 4vw, 3.5rem); align-items: start; }
.openbook .book-left {
  position: relative; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 2rem 1.8rem; box-shadow: var(--shadow-card); align-self: start;
}
.openbook .book-left .big-quote { font-family: var(--font-display); font-style: italic; font-size: clamp(1.5rem, 3.4vw, 2.1rem); color: var(--primary); line-height: 1.35; }
.openbook .book-left .big-quote-zh { font-family: var(--font-serif); font-weight: 700; }
.openbook .book-left .pen { width: 56px; height: 56px; color: var(--accent); margin-bottom: 1rem; }

/* mission pillars */
.pillars { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.2rem; margin-bottom: clamp(2rem, 4vw, 3rem); }
.pillar { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.8rem 1.5rem; text-align: center; box-shadow: var(--shadow-card); transition: transform .3s ease, box-shadow .3s ease; }
.pillar:hover { transform: translateY(-4px) rotate(-.4deg); box-shadow: var(--shadow-card-h); }
.pillar .p-ico { width: 56px; height: 56px; margin: 0 auto .9rem; color: var(--primary); }
.pillar h3 { font-size: 1.35rem; margin-bottom: .4rem; }
.pillar p { font-size: .98rem; color: var(--ink-soft); margin: 0; }

/* ============================================================
   Submission
   ============================================================ */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; margin: 1.5rem 0 2.6rem; counter-reset: step; }
.step { position: relative; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.5rem 1.2rem 1.3rem; text-align: center; box-shadow: var(--shadow-card); }
.step .n { display: grid; place-items: center; width: 44px; height: 44px; margin: 0 auto .7rem; border-radius: 999px; background: var(--primary-soft); color: var(--primary); font-family: var(--font-round); font-weight: 700; font-size: 1.3rem; }
.step:nth-child(even) .n { background: color-mix(in srgb, var(--accent) 18%, transparent); color: var(--accent); }
.step h4 { font-family: var(--font-serif); font-size: 1.1rem; margin: 0 0 .35rem; color: var(--ink); }
.step p { font-size: .92rem; color: var(--ink-soft); margin: 0; }
.step::after {
  content: ""; position: absolute; right: -.65rem; top: 2.1rem; width: 1.3rem; height: 2px;
  background: repeating-linear-gradient(90deg, var(--primary) 0 5px, transparent 5px 9px);
}
.step:last-child::after { display: none; }

.specs-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1rem; margin-bottom: 1.6rem; }
.spec-card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.3rem 1.4rem; box-shadow: var(--shadow-card); transition: transform .3s ease, box-shadow .3s ease; }
.spec-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-card-h); }
.spec-card .tag { display: inline-block; font-family: var(--font-round); font-weight: 600; font-size: .8rem; color: var(--pill-ink); background: var(--primary-soft); padding: .2rem .7rem; border-radius: 999px; margin-bottom: .6rem; }
.spec-card p { margin: 0; color: var(--ink); font-size: 1rem; }

.info-cols { display: grid; grid-template-columns: 1fr 1fr; gap: 1.6rem; margin-bottom: 1.6rem; }
.info-block h4 { font-family: var(--font-serif); font-size: 1.15rem; margin: 0 0 .7rem; display: flex; align-items: center; gap: .5rem; }
.info-block h4 .ico { width: 22px; height: 22px; color: var(--accent); }
.ph-list { list-style: none; margin: 0; padding: 0; }
.ph-list li { position: relative; padding-left: 1.5rem; margin-bottom: .55rem; color: var(--ink); }
.ph-list li::before { content: ""; position: absolute; left: 0; top: .62em; width: 8px; height: 8px; border-radius: 50%; background: var(--highlight); }

.deadline-banner {
  display: flex; align-items: center; gap: .7rem; justify-content: center; text-align: center;
  background: var(--primary-soft); color: var(--ink); border: 1px dashed color-mix(in srgb, var(--primary) 55%, transparent);
  border-radius: var(--radius); padding: 1rem 1.4rem; font-weight: 600; font-family: var(--font-serif); margin-bottom: 1.6rem;
}
.deadline-banner .ico { width: 24px; height: 24px; color: var(--primary); flex: none; }

.submit-actions { display: flex; gap: .9rem; justify-content: center; flex-wrap: wrap; margin-top: 1.8rem; }

/* ============================================================
   Ambassador
   ============================================================ */
.ambassador-card {
  display: grid; grid-template-columns: 200px 1fr; gap: clamp(1.4rem, 3vw, 2.6rem); align-items: center;
  background: var(--surface); border: 1px solid var(--line); border-radius: calc(var(--radius) + 6px);
  padding: clamp(1.6rem, 3vw, 2.6rem); box-shadow: var(--shadow-card); max-width: 60rem; margin-inline: auto; position: relative; overflow: hidden;
}
.ambassador-card .portrait {
  width: 200px; height: 200px; flex: none; justify-self: center;
  object-fit: cover; border-radius: 50%; border: 4px solid var(--surface);
  box-shadow: 0 0 0 3px var(--primary-soft), 0 14px 30px rgba(51, 48, 43, .16);
}
.ambassador-card .a-title { font-family: var(--font-serif); font-size: clamp(1.3rem, 2.6vw, 1.6rem); color: var(--ink); margin: 0 0 .8rem; }
.ambassador-card .a-bio { color: var(--ink-soft); font-size: 1rem; margin-bottom: 1rem; }
.a-highlights { list-style: none; margin: 0 0 1.1rem; padding: 0; display: grid; gap: .4rem; }
.a-highlights li { position: relative; padding-left: 1.4rem; font-size: .95rem; color: var(--ink); }
.a-highlights li::before { content: "✦"; position: absolute; left: 0; color: var(--highlight); }
.a-quote { font-family: var(--font-display); font-style: italic; color: var(--primary); border-left: 3px solid var(--highlight); padding-left: 1rem; font-size: 1.05rem; }
.a-quote .lz { font-family: var(--font-serif); font-style: normal; font-weight: 600; }

/* ============================================================
   Team
   ============================================================ */
.team-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.2rem; max-width: 64rem; margin-inline: auto; }
.member { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.6rem 1.3rem; text-align: center; box-shadow: var(--shadow-card); transition: transform .3s ease, box-shadow .3s ease; }
.member:hover { transform: translateY(-4px) rotate(.3deg); box-shadow: var(--shadow-card-h); }
.member .avatar { width: 72px; height: 72px; margin: 0 auto .9rem; display: grid; place-items: center; border-radius: 999px; background: var(--primary-soft); color: var(--primary); }
.member:nth-child(3n+2) .avatar { background: color-mix(in srgb, var(--accent) 16%, transparent); color: var(--accent); }
.member:nth-child(3n) .avatar { background: color-mix(in srgb, var(--accent-2) 16%, transparent); color: var(--accent-2); }
.member .avatar svg { width: 36px; height: 36px; }
.member .avatar-img { width: 96px; height: 96px; margin: 0 auto .9rem; display: block; object-fit: cover; border-radius: 50%; background: var(--primary-soft); border: 3px solid var(--surface); box-shadow: 0 0 0 3px var(--primary-soft), 0 8px 18px rgba(51, 48, 43, .14); }
.member:nth-child(3n+2) .avatar-img { box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 26%, transparent), 0 8px 18px rgba(51, 48, 43, .14); }
.member:nth-child(3n) .avatar-img { box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent-2) 26%, transparent), 0 8px 18px rgba(51, 48, 43, .14); }
.member { display: flex; flex-direction: column; align-items: center; }
.member .m-namewrap { margin-bottom: .15rem; }
.member .m-name { display: block; font-family: var(--font-serif); font-weight: 700; font-size: 1.2rem; color: var(--ink); }
.member .m-sub { display: block; font-size: .85rem; color: var(--ink-soft); font-family: var(--font-display); font-style: italic; }
.member .m-role { margin-top: .3rem; display: block; font-family: var(--font-round); font-weight: 700; font-size: .92rem; line-height: 1.45; color: var(--pill-ink); }
.member .m-stats { width: 100%; margin-top: .95rem; padding-top: .95rem; border-top: 1px dashed var(--line); display: flex; flex-direction: column; align-items: center; gap: .4rem; }
.member .m-skill { display: inline-flex; align-items: center; gap: .45rem; flex-wrap: wrap; justify-content: center; }
.member .m-skill-k { font-size: .68rem; letter-spacing: .12em; color: var(--ink-soft); background: var(--surface-2); border: 1px solid var(--line); padding: .12rem .5rem; border-radius: 999px; }
.member .m-skill-v { font-family: var(--font-round); font-weight: 700; font-size: 1.02rem; color: var(--accent); }
.member:nth-child(3n) .m-skill-v { color: var(--accent-2); }
.member .m-effect { font-size: .9rem; line-height: 1.6; color: var(--ink-soft); font-style: italic; margin: 0; max-width: 22rem; }
.member .m-base { display: inline-flex; align-items: center; gap: .35rem; margin-top: auto; padding-top: .9rem; font-size: .86rem; color: var(--accent); text-decoration: none; font-weight: 600; }
.member .m-base:hover { color: var(--primary); }
.member .m-base-ico { width: 14px; height: 14px; flex: none; }
/* 固定高度讓六張卡片各列對齊 */
.member .m-role { min-height: 2.7em; display: flex; align-items: center; justify-content: center; }
.member .m-effect { min-height: 2.9em; display: flex; align-items: center; justify-content: center; }

/* ============================================================
   分頁（client-side 切換）
   ============================================================ */
.page { display: none; }
.page.active { display: block; animation: pageIn .4s ease both; }
@keyframes pageIn { from { opacity: 0; } to { opacity: 1; } }
.page > .section:first-child { padding-top: calc(var(--nav-h) + clamp(1.6rem, 4vw, 3.2rem)); }
@media (prefers-reduced-motion: reduce) { .page.active { animation: none; } }

/* ============================================================
   手風琴（透明與 AI 折疊）
   ============================================================ */
.trust-accordion { max-width: 56rem; margin-inline: auto; display: grid; gap: 1rem; }
.accordion-item { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow-card); overflow: hidden; }
.accordion-summary { display: flex; align-items: center; gap: .7rem; padding: 1.2rem 1.5rem; cursor: pointer; list-style: none; font-family: var(--font-serif); font-weight: 700; font-size: clamp(1.05rem, 2.4vw, 1.25rem); color: var(--ink); }
.accordion-summary::-webkit-details-marker { display: none; }
.accordion-summary:hover { color: var(--primary); }
.accordion-summary .ico { width: 26px; height: 26px; color: var(--accent); flex: none; }
.accordion-item:nth-child(2) .accordion-summary .ico { color: var(--accent-2); }
.accordion-summary .acc-chevron { margin-left: auto; color: var(--ink-soft); display: inline-flex; transition: transform .25s ease; }
.accordion-summary .acc-chevron svg { width: 22px; height: 22px; }
.accordion-item[open] .accordion-summary .acc-chevron { transform: rotate(180deg); }
.accordion-item[open] .accordion-summary { color: var(--primary); }
.accordion-body { padding: 0 1.5rem 1.4rem; }
.accordion-body p { color: var(--ink-soft); margin: 0 0 .9rem; line-height: 1.85; }
.accordion-body p:last-child { margin-bottom: 0; }

/* ============================================================
   Transparency & AI
   ============================================================ */
.trust-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1.4rem; max-width: 62rem; margin-inline: auto; }
.trust-card { background: var(--surface); border: 1px solid var(--line); border-left: 4px solid var(--accent); border-radius: var(--radius); padding: 1.8rem 1.7rem; box-shadow: var(--shadow-card); }
.trust-card:nth-child(2) { border-left-color: var(--accent-2); }
.trust-card .t-head { display: flex; align-items: center; gap: .6rem; margin-bottom: .8rem; }
.trust-card .t-head .ico { width: 28px; height: 28px; color: var(--accent); flex: none; }
.trust-card:nth-child(2) .t-head .ico { color: var(--accent-2); }
.trust-card h3 { font-size: 1.25rem; }
.trust-card p { color: var(--ink-soft); margin: 0; }

/* ============================================================
   Join / CTA
   ============================================================ */
.join { position: relative; overflow: hidden; }
.join-card {
  position: relative; background: var(--surface); border: 1px solid var(--line); border-radius: calc(var(--radius) + 10px);
  padding: clamp(2.2rem, 5vw, 3.6rem); text-align: center; box-shadow: var(--shadow-card); max-width: 56rem; margin-inline: auto; overflow: hidden;
}
.join-card .join-glow { position: absolute; left: 50%; top: -30%; width: 80%; aspect-ratio: 1; transform: translateX(-50%); background: radial-gradient(circle, color-mix(in srgb, var(--highlight) 30%, transparent), transparent 60%); pointer-events: none; }
.join-card .lead { margin-bottom: 1.6rem; }
.join-ways { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; max-width: 40rem; margin: 0 auto 2rem; text-align: left; }
.join-way { display: flex; align-items: center; gap: .7rem; background: var(--surface-2); border: 1px solid var(--line); border-radius: var(--radius-sm); padding: .9rem 1.1rem; }
.join-way .ico { width: 26px; height: 26px; color: var(--primary); flex: none; }
.join-way span { font-size: .98rem; }
.join-quote { font-family: var(--font-display); font-style: italic; color: var(--ink-soft); font-size: 1.1rem; margin-top: 1.6rem; }
.join-quote .lz { font-family: var(--font-serif); font-style: normal; }

/* ============================================================
   Footer
   ============================================================ */
.footer { position: relative; z-index: 1; border-top: 1px solid var(--line); padding-block: clamp(2.5rem, 5vw, 3.5rem) 1.5rem; background: var(--surface-2); }
.footer-grid { display: grid; grid-template-columns: 1.3fr 1.2fr 1fr; gap: 2.4rem; align-items: start; }
.footer-brand { display: inline-block; }
.footer-logo { width: clamp(150px, 23vw, 196px); height: auto; display: block; margin-bottom: 1rem; }
.footer-tag { color: var(--ink-soft); max-width: 26rem; font-size: .95rem; line-height: 1.85; }
.footer h4 { font-family: var(--font-serif); font-size: 1.02rem; margin: .2rem 0 1.1rem; color: var(--ink); position: relative; padding-bottom: .5rem; }
.footer h4::after { content: ""; position: absolute; left: 0; bottom: 0; width: 28px; height: 3px; border-radius: 6px; background: var(--primary); }
.footer-links { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: 1fr 1fr; gap: .6rem 1.2rem; }
.footer-links a { display: inline-flex; align-items: center; gap: .3rem; color: var(--ink-soft); text-decoration: none; font-size: .95rem; transition: color .2s; }
.footer-links a::before { content: "›"; color: var(--primary); opacity: 0; transform: translateX(-5px); transition: opacity .2s, transform .2s; }
.footer-links a:hover { color: var(--primary); }
.footer-links a:hover::before { opacity: 1; transform: none; }
.footer-col .btn { margin-bottom: 1.2rem; }
.future-prose { max-width: 46rem; margin-inline: auto; text-align: center; }
.social { display: flex; gap: .6rem; flex-wrap: wrap; }
.social a { display: inline-grid; place-items: center; width: 40px; height: 40px; border-radius: 999px; background: var(--surface); border: 1px solid var(--line); color: var(--ink); transition: transform .2s, color .2s, border-color .2s; }
.social a:hover { transform: translateY(-2px); color: var(--primary); border-color: var(--primary); }
.social a svg { width: 20px; height: 20px; }
.footer-contact { font-size: .92rem; color: var(--ink-soft); margin-top: .8rem; }
.footer-contact a { color: var(--accent); }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; gap: 1rem; flex-wrap: wrap; margin-top: 2.2rem; padding-top: 1.3rem; border-top: 1px solid var(--line); font-size: .86rem; color: var(--ink-soft); }
.footer-bottom .ver { font-family: var(--font-round); }
.footer-rule { height: 2px; margin-top: 1.2rem; background: linear-gradient(90deg, transparent, var(--highlight), transparent); opacity: .6; }

/* ============================================================
   Reveal animation
   ============================================================ */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity .7s cubic-bezier(.22,.61,.36,1), transform .7s cubic-bezier(.22,.61,.36,1); }
.reveal.in { opacity: 1; transform: none; }
.stagger > * { opacity: 0; transform: translateY(18px); transition: opacity .6s cubic-bezier(.22,.61,.36,1), transform .6s cubic-bezier(.22,.61,.36,1); }
.stagger.in > * { opacity: 1; transform: none; }
.stagger.in > *:nth-child(2) { transition-delay: .08s; }
.stagger.in > *:nth-child(3) { transition-delay: .16s; }
.stagger.in > *:nth-child(4) { transition-delay: .24s; }
.stagger.in > *:nth-child(5) { transition-delay: .32s; }
.stagger.in > *:nth-child(6) { transition-delay: .4s; }

@media (prefers-reduced-motion: reduce) {
  .reveal, .stagger > * { opacity: 1 !important; transform: none !important; transition: none !important; }
  .hero-glow, .scroll-cue svg, .btn-primary::before { animation: none !important; }
}

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 900px) {
  .openbook { grid-template-columns: 1fr; }
  .info-cols, .trust-grid, .specs-grid { grid-template-columns: 1fr; }
  .team-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .ambassador-card { grid-template-columns: 1fr; text-align: center; }
  .ambassador-card .portrait { margin-bottom: .5rem; }
  .a-quote, .a-highlights li { text-align: left; }

  /* 導覽列收為漢堡模式（與版面斷點一致，避免 721–900px 擁擠） */
  .nav-links {
    position: fixed; inset: var(--nav-h) 0 auto 0; flex-direction: column; align-items: stretch; gap: 0;
    background: var(--surface); border-bottom: 1px solid var(--line); padding: .6rem 1rem 1rem;
    box-shadow: 0 16px 30px rgba(51, 48, 43, .14); transform: translateY(-12px); opacity: 0; visibility: hidden;
    pointer-events: none; transition: opacity .25s, transform .25s, visibility .25s;
  }
  .nav-links.open { transform: none; opacity: 1; visibility: visible; pointer-events: auto; }
  .nav-links a { padding: .8rem .6rem; border-radius: 10px; }
  .nav-links a::after { display: none; }
  .nav-links a:hover { background: var(--surface-2); }
  .nav .nav-cta { display: none; }
  .hamburger { display: inline-grid; }
}

@media (max-width: 720px) {
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
  .pillars, .steps { grid-template-columns: 1fr; }
  .step::after { display: none; }
  .join-ways { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .team-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .hero-cta .btn, .submit-actions .btn { width: 100%; justify-content: center; }
  .brand-logo { height: 38px; }
}