/* 本檔由 scripts/import_ui_static.py 從 aicontest-ui/css/main.css 同步。
 * **不要手改這個檔**——前台畫面以設計師版本為準（見 .claude/frontend.md）。
 * 要改請改設計師來源檔後重跑：python scripts/import_ui_static.py
 */
/* ==========================================================================
   AI 競賽活動網站 — 主樣式表
   依據：2026 神盾盃邀請卡／宣傳海報與網站需求簡報
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Design Tokens
   -------------------------------------------------------------------------- */
:root {
  /* 色彩（0806 網站規劃：明亮科技藍＋白為主，深藍僅局部使用如頁尾） */
  --color-ink-950: #0A2B4D;
  --color-ink-900: #103760;
  --color-ink-800: #1C4E86;
  --color-surface: #F3F8FD;
  --color-sky: #E5F1FB;
  --color-white: #FFFFFF;
  --color-text: #12283C;
  --color-text-muted: #4F6A80;
  --color-line: #D4E2EE;
  --color-cyan: #45D9D0;
  --color-blue: #1266C2;
  --color-blue-deep: #0C4E9B;
  --color-defense: #46684F;
  --color-warm: #DD660F;
  --color-purple: #6C57C9;
  --color-amber: #FFB82E;
  --color-success: #0B7968;
  --color-danger: #B42318;

  /* 深色背景上的文字 */
  --color-text-on-dark: #F3F7F8;
  --color-text-muted-on-dark: #C2D1D5;
  --color-line-on-dark: rgba(167, 219, 224, 0.2);

  /* 字體：Noto Sans TC 內文＋Chakra Petch 儀表數字／標籤（航電讀數感） */
  --font-sans: "Noto Sans TC", system-ui, -apple-system, BlinkMacSystemFont,
    "PingFang TC", "Microsoft JhengHei", sans-serif;
  --font-display: "Chakra Petch", "SF Pro Display", system-ui, sans-serif;
  --font-mono: var(--font-display);

  /* 層次陰影（Stripe 式柔和多層） */
  --shadow-sm: 0 1px 2px rgba(13, 40, 70, 0.05), 0 2px 8px rgba(13, 40, 70, 0.05);
  --shadow-md: 0 2px 4px rgba(13, 40, 70, 0.05), 0 12px 24px -8px rgba(13, 40, 70, 0.14);
  --shadow-focus: 0 0 0 4px rgba(18, 102, 194, 0.16);

  /* 間距（4px 基準） */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-24: 6rem;

  /* 懸浮膠囊導覽總高(68px 膠囊 + 上下 12px 留白):hero 上移與吸頂偏移共用 */
  --nav-clearance: 5.75rem;

  /* 圓角 */
  --radius-container: 16px;
  --radius-card: 12px;
  --radius-control: 8px;
  --radius-pill: 999px;

  /* 動態 */
  --transition-fast: 180ms ease-out;
  --transition-enter: 320ms ease-out;

  color-scheme: light;
}

/* --------------------------------------------------------------------------
   2. Reset 與基礎
   -------------------------------------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
}

html {
  font-size: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-surface);
  /* 藍圖細網格+兩處柔光:延續 page-hero 網格紋理的儀表板語言,強度壓在卡片之下 */
  background-image:
    radial-gradient(ellipse 55% 40% at 10% 5%, rgba(18, 102, 194, 0.05), transparent 70%),
    radial-gradient(ellipse 45% 35% at 92% 40%, rgba(69, 217, 208, 0.055), transparent 70%),
    linear-gradient(rgba(18, 102, 194, 0.032) 1px, transparent 1px),
    linear-gradient(90deg, rgba(18, 102, 194, 0.032) 1px, transparent 1px);
  background-size: auto, auto, 48px 48px, 48px 48px;
  -webkit-font-smoothing: antialiased;
}

img,
svg,
video {
  max-width: 100%;
  height: auto;
  display: block;
}

h1, h2, h3, h4 {
  line-height: 1.2;
  font-weight: 700;
  overflow-wrap: break-word;
}

p {
  overflow-wrap: break-word;
}

a {
  color: var(--color-blue);
}

a:hover {
  text-decoration-thickness: 2px;
}

:focus-visible {
  outline: 3px solid var(--color-blue);
  outline-offset: 2px;
}

.on-dark :focus-visible,
.site-footer :focus-visible {
  outline-color: var(--color-cyan);
}

/* Sticky header 下的錨點捲動位移 */
[id] {
  scroll-margin-block-start: 5rem;
}

:focus:not(:focus-visible) {
  outline: none;
}

/* --------------------------------------------------------------------------
   3. 公用工具
   -------------------------------------------------------------------------- */
.container {
  width: min(100% - 2rem, 1200px);
  margin-inline: auto;
}

.skip-link {
  position: absolute;
  inset-block-start: -100%;
  inset-inline-start: 0;
  z-index: 100;
  padding: var(--space-3) var(--space-6);
  background: var(--color-cyan);
  color: var(--color-ink-950);
  font-weight: 700;
  text-decoration: none;
  border-end-end-radius: var(--radius-control);
}

.skip-link:focus {
  inset-block-start: 0;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.section {
  padding-block: clamp(var(--space-16), 8vw, var(--space-24));
}

.section--tight {
  padding-block: clamp(var(--space-12), 6vw, var(--space-16));
}

.section--alt {
  background: rgba(255, 255, 255, 0.74);
  border-block: 1px solid var(--color-line);
}

.section--dark {
  background: var(--color-ink-900);
  color: var(--color-text-on-dark);
}

.section-header--with-logo {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-start;
  gap: var(--space-6);
}

.track-logo {
  inline-size: clamp(5rem, 8vw, 7rem);
  block-size: auto;
}

.section-header--center {
  margin-inline: auto;
  text-align: center;
}

.section-eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  letter-spacing: 0.12em;
  color: var(--color-blue);
  margin-block-end: var(--space-2);
}

.section--dark .section-eyebrow {
  color: var(--color-cyan);
}

.section-title {
  font-size: clamp(1.5rem, 2.5vw, 2.5rem);
}

.section-lede {
  margin-block-start: var(--space-4);
  color: var(--color-text-muted);
  max-width: 65ch;
}

.section--dark .section-lede {
  color: var(--color-text-muted-on-dark);
}

.prose {
  max-width: 70ch;
}

.prose p + p {
  margin-block-start: var(--space-4);
}

.prose ul,
.prose ol {
  padding-inline-start: 1.5em;
  margin-block: var(--space-4);
}

.prose li + li {
  margin-block-start: var(--space-2);
}

/* [待確認] placeholder 標示 */
.tbd {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.8125em;
  padding: 0 var(--space-2);
  border: 1px dashed var(--color-amber);
  border-radius: var(--space-1);
  color: #8A6116;
  background: rgba(244, 183, 64, 0.12);
  white-space: nowrap;
}

.on-dark .tbd,
.section--dark .tbd,
.hero .tbd {
  color: var(--color-amber);
  background: rgba(244, 183, 64, 0.1);
}

/* 示意內容提示 */
.demo-notice {
  display: flex;
  gap: var(--space-3);
  align-items: flex-start;
  padding: var(--space-4) var(--space-6);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-control);
  background: var(--color-white);
  color: var(--color-text-muted);
  font-size: 0.9375rem;
  margin-block-end: var(--space-8);
}

/* --------------------------------------------------------------------------
   4. 導覽列
   -------------------------------------------------------------------------- */
/* 懸浮膠囊導覽列:外層透明只負責吸頂,膠囊本體=淡邊框+淺陰影+玻璃底 */
.site-header {
  position: sticky;
  inset-block-start: 0;
  z-index: 50;
  padding-block: var(--space-3);
  pointer-events: none;
}

.site-header__inner {
  pointer-events: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  /* 膠囊高 68px:44px 按鈕上下留 12px,與右內距 12px 同心(圓角差=半徑差) */
  min-height: 4.25rem;
  padding-inline: var(--space-5) var(--space-3);
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-pill);
  box-shadow: var(--shadow-sm);
  transition: background-color var(--transition-fast), box-shadow var(--transition-fast);
}

.site-header.is-scrolled .site-header__inner {
  background: rgba(255, 255, 255, 0.95);
  box-shadow: 0 0.375rem 1.25rem rgba(18, 40, 60, 0.1);
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--color-text);
  text-decoration: none;
  font-weight: 700;
  min-height: 44px;
}

/* 頁尾（深藍底）上的品牌字色 */
.site-footer .brand {
  color: var(--color-text-on-dark);
}

.brand__mark {
  inline-size: 2.25rem;
  block-size: 2.25rem;
  flex-shrink: 0;
  display: grid;
  place-items: center;
  border: 1px solid var(--color-blue);
  border-radius: var(--radius-control);
  color: var(--color-blue);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%);
}

.site-footer .brand__mark {
  border-color: var(--color-cyan);
  color: var(--color-cyan);
}

.brand__mark--logo {
  border: 0;
  clip-path: none;
  background: var(--color-white);
  object-fit: contain;
  padding: 2px;
  inline-size: 2.5rem;
  block-size: 2.5rem;
  border-radius: var(--radius-control);
}

.site-footer .brand__mark--logo {
  border: 1px solid rgba(255, 255, 255, 0.35);
}

/* 導覽列官方橫式 lockup(盾徽+金屬字,由直式 919757 重組) */
.brand__lockup {
  display: block;
  block-size: 3rem;
  inline-size: auto;
}

@media (max-width: 30rem) {
  .brand__lockup {
    block-size: 2.5rem;
  }
}

.brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.25;
}

.brand__text small {
  font-weight: 400;
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

.site-footer .brand__text small {
  color: var(--color-text-muted-on-dark);
}

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  min-inline-size: 44px;
  min-block-size: 44px;
  background: transparent;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-control);
  color: var(--color-text);
  cursor: pointer;
}

.nav-toggle svg {
  inline-size: 1.375rem;
  block-size: 1.375rem;
}

.nav-toggle .icon-close { display: none; }
.nav-toggle[aria-expanded="true"] .icon-menu { display: none; }
.nav-toggle[aria-expanded="true"] .icon-close { display: block; }

.site-nav {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  list-style: none;
  padding: 0;
}

.site-nav__link {
  display: inline-flex;
  align-items: center;
  min-block-size: 44px;
  padding-inline: var(--space-3);
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: 0.9375rem;
  border-block-end: 2px solid transparent;
  transition: color var(--transition-fast);
}

.site-nav__link:hover,
.site-nav__link:focus-visible {
  color: var(--color-text);
}

.site-nav__link[aria-current="page"] {
  color: var(--color-blue);
  border-block-end-color: var(--color-blue);
  font-weight: 700;
}

/* 首頁子選單：活動介紹／活動時程（0806 規劃 §4.1 首頁錨點） */
.site-nav__item--has-sub {
  position: relative;
}

.site-nav__caret {
  font-size: 0.6875rem;
  margin-inline-start: var(--space-1);
}

.site-nav__sub {
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-nav__sub a {
  display: flex;
  align-items: center;
  min-block-size: 44px;
  padding: var(--space-2) var(--space-4);
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: 0.9375rem;
  border-radius: var(--radius-control);
}

.site-nav__sub a:hover,
.site-nav__sub a:focus-visible {
  background: var(--color-sky);
  color: var(--color-blue);
}

/* --------------------------------------------------------------------------
   5. 按鈕
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-block-size: 44px;
  min-inline-size: 44px;
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  font-family: inherit;
  font-size: 1rem;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
  letter-spacing: 0.01em;
  box-shadow: 0 0 0 rgba(0, 0, 0, 0);
  transition: background-color var(--transition-fast), color var(--transition-fast),
    border-color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
}

/* hover 一律只變色:不位移、不加陰影;鍵盤焦點保留 focus ring */
.btn:focus-visible {
  box-shadow: var(--shadow-focus);
}

.btn:active {
  transform: scale(0.98);
}

::selection {
  background: rgba(18, 102, 194, 0.18);
}

/* 主要 CTA（報名入口）：0806 色彩用途表指定橘色／暖色 */
.btn--primary {
  background: var(--color-warm);
  color: var(--color-white);
}

.btn--primary:hover {
  background: #C2570A;
}

.btn--primary:focus-visible {
  background: #C2570A;
  box-shadow: var(--shadow-focus);
}

/* 科技藍主按鈕：一般主要操作 */
.btn--primary-light {
  background: var(--color-blue);
  color: var(--color-white);
}

.btn--primary-light:hover,
.btn--primary-light:focus-visible {
  background: var(--color-blue-deep);
}

/* 次要按鈕：白底＋邊框（明亮區塊用） */
.btn--secondary {
  background: var(--color-white);
  border-color: var(--color-line);
  color: var(--color-blue);
}

.btn--secondary:hover,
.btn--secondary:focus-visible {
  border-color: var(--color-blue);
  color: var(--color-blue-deep);
}

.btn--secondary-light {
  background: transparent;
  border-color: var(--color-blue);
  color: var(--color-blue);
}

.btn--secondary-light:hover,
.btn--secondary-light:focus-visible {
  background: rgba(18, 102, 194, 0.08);
}

/* 深色區塊上的次要按鈕 */
.section--dark .btn--secondary-light,
.cta-band .btn--secondary-light,
.photo-band .btn--secondary-light,
.portal-panel--dark .btn--secondary-light {
  border-color: rgba(255, 255, 255, 0.55);
  color: var(--color-text-on-dark);
}

.section--dark .btn--secondary-light:hover,
.section--dark .btn--secondary-light:focus-visible,
.cta-band .btn--secondary-light:hover,
.cta-band .btn--secondary-light:focus-visible,
.photo-band .btn--secondary-light:hover,
.photo-band .btn--secondary-light:focus-visible {
  background: rgba(255, 255, 255, 0.12);
}

.btn--sm {
  min-block-size: 44px;
  padding: var(--space-2) var(--space-4);
  font-size: 0.9375rem;
}

/* 停用狀態（2026-09-01 新增，第一個用途是各競賽資料「待上架」的下載按鈕）。
   用 [aria-disabled="true"] 而不是 :disabled：這些位置是 <a>，<a> 沒有
   disabled 屬性，而 aria-disabled 同時把狀態傳給輔助技術。灰底＋
   cursor:not-allowed 是視覺上的「不能按」，真正擋住點擊的是它沒有 href
   （無 href 的 <a> 本來就不可點、也不會進 Tab 順序）。
   蓋掉所有色彩變體，因此放在變體規則之後。 */
.btn[aria-disabled="true"] {
  background: var(--color-line);
  border-color: var(--color-line);
  color: var(--color-text-muted);
  cursor: not-allowed;
  box-shadow: none;
}

/* hover／active 一律不反應，避免看起來還能按 */
.btn[aria-disabled="true"]:hover,
.btn[aria-disabled="true"]:focus-visible {
  background: var(--color-line);
  color: var(--color-text-muted);
}

.btn[aria-disabled="true"]:active {
  transform: none;
}

/* --------------------------------------------------------------------------
   6. Hero
   -------------------------------------------------------------------------- */
.hero {
  position: relative;
  background: transparent;
  color: var(--color-text);
  overflow: hidden;
  isolation: isolate;
}

/* KV Hero:官方主視覺完整置中,雲海底圖左右無縫延伸,資訊列下置不壓圖 */
.hero--kv {
  margin-block-start: calc(-1 * var(--nav-clearance));
  background:
    url("../../img/brand/sky.jpg") center top / cover no-repeat;
}

.hero__kv-stage {
  display: grid;
  place-items: center;
  padding-block-start: var(--nav-clearance);
}

.hero__kv-art {
  display: block;
  inline-size: auto;
  /* 不放大超過原生 1536px,維持銳利;高度受限時等比縮小,兩側透出雲海 */
  max-inline-size: min(100%, 96rem);
  block-size: auto;
  max-block-size: calc(100svh - var(--nav-clearance) - 8rem);
  /* 圓角矩形溶解:水平×垂直羽化交集,四邊融入雲海、角落自然圓潤 */
  border-radius: clamp(12px, 1.5vw, 24px);
  -webkit-mask-image:
    linear-gradient(to right, transparent, #000 8%, #000 92%, transparent),
    linear-gradient(to bottom, transparent, #000 9%, #000 90%, transparent);
  -webkit-mask-composite: source-in;
  mask-image:
    linear-gradient(to right, transparent, #000 8%, #000 92%, transparent),
    linear-gradient(to bottom, transparent, #000 9%, #000 90%, transparent);
  mask-composite: intersect;
}

.hero__kv-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: var(--space-4) var(--space-8);
  padding-block: var(--space-5) clamp(var(--space-12), 6vw, var(--space-16));
}

.hero__kv-bar .hero__dates,
.hero__kv-bar .hero__actions {
  margin-block-start: 0;
}

.hero__kv-bar .btn {
  white-space: nowrap;
}


@keyframes grid-drift {
  from { background-position: 0 0; }
  to   { background-position: 48px 48px; }
}

.hero__inner {
  display: grid;
  gap: clamp(var(--space-8), 6vw, var(--space-16));
  align-items: center;
  padding-block: clamp(var(--space-16), 10vw, var(--space-24));
}

.hero__tagline {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  letter-spacing: 0.14em;
  color: var(--color-blue);
  margin-block-end: var(--space-4);
}

.hero__tagline::before {
  content: "";
  inline-size: 2rem;
  block-size: 1px;
  background: var(--color-blue);
}

.hero__title {
  font-size: clamp(2.5rem, 4.5vw, 4rem);
  line-height: 1.15;
  letter-spacing: 0.01em;
  text-wrap: balance;
  max-inline-size: 13.5em;
}

.hero__title-keep {
  white-space: nowrap;
}

.hero__subtitle {
  margin-block-start: var(--space-4);
  font-size: clamp(1rem, 1.5vw, 1.25rem);
  color: var(--color-text-muted);
  max-width: 34em;
  line-height: 1.75;
}

.hero__dates {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3) var(--space-8);
  margin-block-start: var(--space-6);
  padding: var(--space-4) var(--space-6);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  background: var(--color-white);
  box-shadow: 0 0.5rem 1.5rem rgba(18, 40, 60, 0.06);
  inline-size: fit-content;
}

.hero__date-item {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.hero__date-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
}

.hero__date-value {
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--color-blue-deep);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin-block-start: var(--space-8);
}

/* Hero／page-hero 背景照片（含深色遮罩，確保標題與 CTA 可讀） */
.hero__photo,
.page-hero__photo {
  position: absolute;
  inset: 0;
  z-index: -3;
}

.hero__photo img,
.page-hero__photo img {
  inline-size: 100%;
  block-size: 100%;
  object-fit: cover;
}

.hero__photo::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(6, 21, 34, 0.94) 0%, rgba(6, 21, 34, 0.78) 58%, rgba(6, 21, 34, 0.56) 100%),
    linear-gradient(180deg, rgba(6, 21, 34, 0.24), rgba(6, 21, 34, 0.88));
}

.page-hero__photo::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(6, 21, 34, 0.64), rgba(6, 21, 34, 0.9));
}

.hero__visual {
  display: none;
  justify-self: center;
}

.hero__visual img {
  inline-size: 100%;
  object-fit: cover;
  border: 1px solid rgba(255, 255, 255, 0.8);
  border-radius: var(--radius-container);
  box-shadow: 0 1.5rem 4rem rgba(18, 40, 60, 0.22);
}

/* 內頁 page hero：科技藍漸層帶（深藍僅局部使用） */
.page-hero {
  background: linear-gradient(120deg, var(--color-ink-900) 0%, var(--color-blue) 100%);
  color: var(--color-text-on-dark);
  position: relative;
  overflow: hidden;
  isolation: isolate;
}

.page-hero::before {
  z-index: -2;
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(66, 224, 208, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(66, 224, 208, 0.05) 1px, transparent 1px);
  background-size: 48px 48px;
}

.page-hero {
  margin-block-start: calc(-1 * var(--nav-clearance));
}

.page-hero__inner {
  position: relative;
  padding-block:
    calc(var(--nav-clearance) + clamp(var(--space-8), 5vw, var(--space-12)))
    clamp(var(--space-12), 7vw, var(--space-16));
}

.page-hero__eyebrow {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  letter-spacing: 0.14em;
  color: var(--color-cyan);
  margin-block-end: var(--space-2);
  display: block;
}

.page-hero__title {
  font-size: clamp(2rem, 3.5vw, 3.75rem);
}

.page-hero__lede {
  margin-block-start: var(--space-4);
  color: var(--color-text-muted-on-dark);
  max-width: 60ch;
  line-height: 1.75;
}

/* --------------------------------------------------------------------------
   7. 卡片與網格
   -------------------------------------------------------------------------- */
.card-grid {
  display: grid;
  gap: var(--space-6);
  grid-template-columns: 1fr;
}

.card {
  background: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  box-shadow: var(--shadow-sm);
  transition: border-color var(--transition-fast), transform var(--transition-fast),
    box-shadow var(--transition-fast);
}

.card:hover {
  border-color: var(--color-blue);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.card__icon {
  inline-size: 2.75rem;
  block-size: 2.75rem;
  display: grid;
  place-items: center;
  border-radius: var(--radius-control);
  background: rgba(46, 107, 80, 0.08);
  color: var(--color-blue);
}

.card__icon svg {
  inline-size: 1.5rem;
  block-size: 1.5rem;
}

.card__title {
  font-size: 1.25rem;
}

.card__body {
  color: var(--color-text-muted);
  font-size: 0.9375rem;
  flex-grow: 1;
}

.card__link {
  font-weight: 700;
  text-decoration: none;
  color: var(--color-blue);
}

.card__link:hover,
.card__link:focus-visible {
  text-decoration: underline;
}

/* 深色卡片（深色區塊內） */
.section--dark .card {
  background: var(--color-ink-800);
  border-color: var(--color-line-on-dark);
}

.section--dark .card__title {
  color: var(--color-text-on-dark);
}

.section--dark .card__body {
  color: var(--color-text-muted-on-dark);
}

.section--dark .card:hover {
  border-color: var(--color-cyan);
}

.section--dark .card__icon {
  background: rgba(66, 224, 208, 0.1);
  color: var(--color-cyan);
}

/* --------------------------------------------------------------------------
   8. 時程 Timeline
   -------------------------------------------------------------------------- */
.timeline {
  list-style: none;
  padding: 0;
  display: grid;
  gap: var(--space-5);
  position: relative;
}

.timeline::before {
  content: "";
  position: absolute;
  inset-block: 0.75rem;
  inset-inline-start: 0.5625rem;
  inline-size: 2px;
  background: linear-gradient(180deg, var(--color-blue), var(--color-cyan));
}

.timeline__item {
  position: relative;
  padding-inline-start: var(--space-8);
}

/* 時間軸（明亮版：白底節點＋科技藍讀數） */
.timeline__dot {
  position: absolute;
  inset-inline-start: 0;
  inset-block-start: 0.375rem;
  inline-size: 1.25rem;
  block-size: 1.25rem;
  border-radius: 50%;
  border: 2px solid #A8C3DE;
  background: var(--color-white);
  box-shadow: var(--shadow-sm);
}

.timeline__item--current .timeline__dot {
  border-color: var(--color-blue);
  background: var(--color-blue);
  box-shadow: 0 0 0 4px rgba(18, 102, 194, 0.18);
}

.timeline__item--deadline .timeline__dot {
  border-color: var(--color-warm);
}

.timeline__date {
  font-family: var(--font-display);
  font-size: 0.875rem;
  font-variant-numeric: tabular-nums;
  color: var(--color-text-muted);
}

.timeline__item--current .timeline__date {
  color: var(--color-blue-deep);
}

.timeline__item--deadline .timeline__date {
  color: var(--color-warm);
}

.timeline__stage {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-text);
  margin-block-start: var(--space-1);
}

.timeline__desc {
  color: var(--color-text-muted);
  font-size: 0.9375rem;
  margin-block-start: var(--space-1);
  max-width: 40ch;
}

.timeline__status {
  display: inline-block;
  margin-block-start: var(--space-2);
  padding: 0.125rem var(--space-3);
  border-radius: var(--radius-pill);
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 600;
  line-height: 1.75;
  letter-spacing: 0.02em;
}

.timeline__status--current {
  color: var(--color-blue-deep);
  background: rgba(18, 102, 194, 0.1);
}

.timeline__status--upcoming {
  color: var(--color-text-muted);
  background: rgba(79, 106, 128, 0.1);
}

.timeline__status--deadline {
  color: #A34D0B;
  background: rgba(221, 102, 15, 0.1);
}

/* --------------------------------------------------------------------------
   9. 流程步驟（報名流程）
   -------------------------------------------------------------------------- */
.steps {
  list-style: none;
  padding: 0;
  display: grid;
  gap: var(--space-6);
  counter-reset: step;
}

.step {
  counter-increment: step;
  display: flex;
  gap: var(--space-4);
  background: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  padding: var(--space-6);
}

.step::before {
  content: counter(step, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-blue);
  flex-shrink: 0;
  inline-size: 2.75rem;
  block-size: 2.75rem;
  display: grid;
  place-items: center;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-control);
  background: var(--color-surface);
}

.step__title {
  font-size: 1.125rem;
}

.step__desc {
  color: var(--color-text-muted);
  font-size: 0.9375rem;
  margin-block-start: var(--space-1);
}

/* --------------------------------------------------------------------------
   10. 文件下載列
   -------------------------------------------------------------------------- */
.download-list {
  list-style: none;
  padding: 0;
  display: grid;
  gap: var(--space-3);
}

.download-item {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-3) var(--space-4);
  padding: var(--space-4) var(--space-6);
  background: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  transition: border-color var(--transition-fast);
}

.download-item:hover {
  border-color: var(--color-blue);
}

.download-item__format {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding: var(--space-1) var(--space-2);
  border: 1px solid var(--color-line);
  border-radius: var(--space-1);
  color: var(--color-text-muted);
  background: var(--color-surface);
}

.download-item__name {
  font-weight: 700;
  flex-grow: 1;
  min-inline-size: 12rem;
}

.download-item__size {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-variant-numeric: tabular-nums;
  color: var(--color-text-muted);
}

.download-item__link {
  font-weight: 700;
  min-block-size: 44px;
  display: inline-flex;
  align-items: center;
  padding-inline: var(--space-6);
  border: 1px solid var(--color-blue);
  border-radius: var(--radius-pill);
  background: transparent;
  color: var(--color-blue);
  font-family: inherit;
  font-size: 0.9375rem;
  text-decoration: none;
  cursor: pointer;
  transition: background-color var(--transition-fast);
}

.download-item__link:hover,
.download-item__link:focus-visible {
  background: rgba(46, 107, 80, 0.08);
}

/* --------------------------------------------------------------------------
   11. 表格
   -------------------------------------------------------------------------- */
.table-wrapper {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  background: var(--color-white);
}

.data-table {
  inline-size: 100%;
  border-collapse: collapse;
  font-size: 0.9375rem;
  min-inline-size: 36rem;
}

.data-table caption {
  text-align: start;
  padding: var(--space-4) var(--space-6);
  font-weight: 700;
  border-block-end: 1px solid var(--color-line);
}

.data-table th,
.data-table td {
  padding: var(--space-3) var(--space-6);
  text-align: start;
  border-block-end: 1px solid var(--color-line);
}

.data-table tbody tr:last-child th,
.data-table tbody tr:last-child td {
  border-block-end: 0;
}

.data-table thead th {
  background: var(--color-sky);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--color-blue-deep);
}

.data-table tbody tr {
  transition: background-color var(--transition-fast);
}

.data-table tbody tr:hover {
  background: rgba(18, 102, 194, 0.03);
}

.data-table td {
  font-variant-numeric: tabular-nums;
}

/* --------------------------------------------------------------------------
   12. 公告列表與標籤
   -------------------------------------------------------------------------- */
.news-list {
  list-style: none;
  padding: 0;
  display: grid;
  gap: var(--space-3);
}

.news-item {
  background: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  transition: border-color var(--transition-fast);
}

.news-item:hover {
  border-color: var(--color-blue);
}

.news-item__link {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--space-2) var(--space-4);
  padding: var(--space-4) var(--space-6);
  text-decoration: none;
  color: inherit;
}

.news-item__date {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-variant-numeric: tabular-nums;
  color: var(--color-text-muted);
}

.news-item__title {
  font-weight: 700;
  flex-grow: 1;
  min-inline-size: 14rem;
}

.news-item__link:hover .news-item__title,
.news-item__link:focus-visible .news-item__title {
  color: var(--color-blue);
  text-decoration: underline;
}

/* 標籤：淡色底膠囊（Stripe pill-tag-soft 式），儀表字體 */
.tag {
  display: inline-block;
  padding: 0.125rem var(--space-3);
  border-radius: var(--radius-pill);
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 600;
  line-height: 1.75;
  letter-spacing: 0.02em;
  border: 0;
  white-space: nowrap;
}

.tag--info    { color: var(--color-blue-deep); background: rgba(18, 102, 194, 0.1); }
.tag--pinned  { color: #7C5A10; background: rgba(255, 184, 46, 0.18); }
.tag--result  { color: var(--color-success); background: rgba(11, 121, 104, 0.1); }
.tag--urgent  { color: var(--color-danger); background: rgba(180, 35, 24, 0.08); }

/* --------------------------------------------------------------------------
   13. 成果與花絮
   -------------------------------------------------------------------------- */
.gallery-grid {
  display: grid;
  gap: var(--space-6);
  grid-template-columns: 1fr;
}

.gallery-card {
  background: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  overflow: hidden;
  transition: border-color var(--transition-fast), transform var(--transition-fast);
}

.gallery-card:hover {
  border-color: var(--color-blue);
  transform: translateY(-2px);
}

.gallery-card__media {
  aspect-ratio: 16 / 9;
  position: relative;
  display: grid;
  place-items: center;
  overflow: hidden;
}

.gallery-card__media > img {
  position: absolute;
  inset: 0;
  inline-size: 100%;
  block-size: 100%;
  object-fit: cover;
  transition: transform var(--transition-fast);
}

.gallery-card:hover .gallery-card__media > img {
  transform: scale(1.03);
}

.gallery-card__media--video::after {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.35);
}

.gallery-card__media--video .gallery-card__play {
  z-index: 1;
  background:
    radial-gradient(ellipse 70% 80% at 70% 20%, rgba(66, 224, 208, 0.15), transparent 60%),
    linear-gradient(160deg, var(--color-ink-800), var(--color-ink-950));
  color: var(--color-text-muted-on-dark);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  letter-spacing: 0.1em;
}

.gallery-card__play {
  position: absolute;
  inline-size: 3.5rem;
  block-size: 3.5rem;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: rgba(0, 0, 0, 0.7);
  border: 1px solid var(--color-cyan);
  color: var(--color-cyan);
}

.gallery-card__play svg {
  inline-size: 1.25rem;
  block-size: 1.25rem;
}

.gallery-card__body {
  padding: var(--space-4) var(--space-6);
}

.gallery-card__title {
  font-size: 1.0625rem;
}

.gallery-card__meta {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-block-start: var(--space-1);
}

/* 空狀態 */
.empty-state {
  text-align: center;
  padding: clamp(var(--space-12), 8vw, var(--space-16)) var(--space-6);
  border: 1px dashed var(--color-line);
  border-radius: var(--radius-card);
  background: var(--color-white);
}

.empty-state__icon {
  inline-size: 3.5rem;
  block-size: 3.5rem;
  margin-inline: auto;
  margin-block-end: var(--space-4);
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--color-surface);
  color: var(--color-text-muted);
}

.empty-state__title {
  font-size: 1.125rem;
}

.empty-state__desc {
  color: var(--color-text-muted);
  font-size: 0.9375rem;
  margin-block-start: var(--space-2);
}

/* --------------------------------------------------------------------------
   14. 系統入口預覽（免帳密入口）
   -------------------------------------------------------------------------- */
.portal-preview {
  display: grid;
  gap: var(--space-8);
  align-items: center;
}

.portal-preview__list {
  display: grid;
  gap: var(--space-3);
  padding: 0;
  color: var(--color-text-muted-on-dark);
  font-size: 0.9375rem;
  list-style: none;
}

.portal-preview__list li {
  position: relative;
  padding-inline-start: var(--space-6);
}

.portal-preview__list li::before {
  content: "//";
  position: absolute;
  inset-inline-start: 0;
  color: var(--color-cyan);
  font-family: var(--font-mono);
  font-weight: 700;
}

.portal-entry-card {
  background: linear-gradient(145deg, var(--color-ink-800), rgba(10, 32, 48, 0.94));
  border: 1px solid rgba(69, 217, 208, 0.38);
  border-radius: var(--radius-container);
  padding: clamp(var(--space-6), 4vw, var(--space-8));
  max-inline-size: 29rem;
  inline-size: 100%;
  box-shadow: 0 1.5rem 3.5rem rgba(0, 0, 0, 0.22);
}

.portal-entry-card__eyebrow {
  color: var(--color-cyan);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  margin-block-end: var(--space-3);
}

.portal-entry-card__title {
  color: var(--color-text-on-dark);
  font-size: clamp(1.5rem, 3vw, 2rem);
}

.portal-entry-card__desc {
  color: var(--color-text-muted-on-dark);
  margin-block-start: var(--space-3);
}

.portal-entry-card__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-block-start: var(--space-6);
}

.portal-entry-card__actions .btn {
  flex: 1 1 10rem;
}

.portal-entry-card__note {
  margin-block-start: var(--space-4);
  padding-block-start: var(--space-4);
  border-block-start: 1px solid var(--color-line-on-dark);
  color: var(--color-text-muted-on-dark);
  font-size: 0.8125rem;
}

.field {
  margin-block-start: var(--space-4);
}

.field__label {
  display: block;
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--color-text-on-dark);
  margin-block-end: var(--space-2);
}

.field__label .required {
  color: var(--color-amber);
}

.field__input {
  inline-size: 100%;
  min-block-size: 44px;
  padding: var(--space-2) var(--space-3);
  font-family: inherit;
  font-size: 1rem;
  color: var(--color-text-on-dark);
  background-color: var(--color-ink-900);
  border: 1px solid var(--color-line-on-dark);
  border-radius: var(--radius-control);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.field__input:hover {
  border-color: var(--color-text-muted-on-dark);
}

.field__input:focus-visible {
  outline: 2px solid var(--color-cyan);
  outline-offset: 1px;
  border-color: var(--color-cyan);
}

.field__hint {
  font-size: 0.8125rem;
  color: #be0000;
  margin-block-start: var(--space-1);
}

.login-card .btn {
  inline-size: 100%;
  margin-block-start: var(--space-6);
}

.login-card__foot {
  margin-block-start: var(--space-4);
  font-size: 0.875rem;
  text-align: center;
  color: var(--color-text-muted-on-dark);
}

.login-card__foot a {
  color: var(--color-cyan);
}

.text-button {
  padding: 0;
  min-block-size: 44px;
  border: 0;
  background: transparent;
  color: var(--color-cyan);
  font: inherit;
  text-decoration: underline;
  cursor: pointer;
}

/* --------------------------------------------------------------------------
   14c. 參賽專區
   -------------------------------------------------------------------------- */
.portal-hero .page-hero__photo::after {
  background: linear-gradient(90deg, rgba(6, 21, 34, 0.96), rgba(6, 21, 34, 0.68));
}

.portal-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-6);
  margin-block-end: var(--space-8);
}

.portal-toolbar .section-lede {
  margin-block-start: var(--space-2);
}

.portal-alert {
  margin-block-end: var(--space-6);
  padding: var(--space-4) var(--space-6);
  border-radius: var(--radius-control);
  border: 1px solid var(--color-line);
  background: var(--color-white);
  font-weight: 700;
}

.portal-alert--success {
  color: var(--color-success);
}

.portal-alert--error {
  color: var(--color-danger);
}

.status-grid {
  display: grid;
  gap: var(--space-4);
}

.status-card {
  position: relative;
  display: grid;
  align-content: start;
  gap: var(--space-2);
  min-block-size: 9.5rem;
  padding: var(--space-6);
  background: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-md);
}

.status-card__label,
.result-card__label {
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.status-card__value {
  font-size: 1.25rem;
  font-weight: 700;
}

.status-card .tag {
  justify-self: start;
}

/* 自訂進度條：科技藍→訊號青漸層讀數 */
progress {
  inline-size: 100%;
  block-size: 0.5rem;
  overflow: hidden;
  border: 0;
  border-radius: var(--radius-pill);
  background: var(--color-sky);
  appearance: none;
  -webkit-appearance: none;
}

progress::-webkit-progress-bar {
  background: var(--color-sky);
  border-radius: var(--radius-pill);
}

progress::-webkit-progress-value {
  background: linear-gradient(90deg, var(--color-blue), var(--color-cyan));
  border-radius: var(--radius-pill);
  transition: inline-size var(--transition-enter);
}

progress::-moz-progress-bar {
  background: linear-gradient(90deg, var(--color-blue), var(--color-cyan));
  border-radius: var(--radius-pill);
}

.portal-local-nav {
  display: flex;
  gap: var(--space-2);
  margin-block-start: var(--space-6);
  padding: var(--space-2);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.72);
  overflow-x: auto;
  scrollbar-width: thin;
}

.portal-local-nav a {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  min-block-size: 44px;
  padding-inline: var(--space-4);
  color: var(--color-blue);
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  font-weight: 700;
  text-decoration: none;
}

.portal-local-nav a:hover,
.portal-local-nav a:focus-visible {
  border-color: var(--color-blue);
  background: var(--color-white);
}

.portal-layout {
  display: grid;
  gap: var(--space-8);
  align-items: start;
}

.portal-panel-heading {
  max-inline-size: 38rem;
}

.portal-panel-heading .section-lede {
  line-height: 1.75;
}

.portal-panel {
  padding: clamp(var(--space-6), 4vw, var(--space-8));
  background: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-container);
  box-shadow: var(--shadow-md);
}

.portal-panel--dark {
  background: var(--color-ink-800);
  border-color: var(--color-line-on-dark);
  color: var(--color-text-on-dark);
  box-shadow: 0 1.5rem 3.5rem rgba(0, 0, 0, 0.18);
}

.portal-note {
  margin-block-start: var(--space-4);
  padding: var(--space-3) var(--space-4);
  color: var(--color-text);
  background: rgba(255, 184, 46, 0.12);
  border-inline-start: 3px solid var(--color-amber);
  border-radius: var(--radius-control);
  font-size: 0.875rem;
}

.form-grid {
  display: grid;
  gap: var(--space-4) var(--space-6);
}

.field--light {
  margin-block-start: 0;
}

.field--light .field__label {
  color: var(--color-text);
}

.field--light .field__input {
  color: var(--color-text);
  background-color: var(--color-white);
  border-color: var(--color-line);
}

.field--light .field__input:hover {
  border-color: var(--color-blue);
}

/* Stripe 式聚焦環：邊框變色＋柔和外圈，取代瀏覽器預設 outline */
.field--light .field__input:focus-visible,
.field__input:focus-visible {
  outline: none;
  border-color: var(--color-blue);
  box-shadow: var(--shadow-focus);
}

.field--light .field__hint {
  color: var(--color-text-muted);
}

.field__optional {
  color: var(--color-text-muted);
  font-size: 0.75rem;
  font-weight: 400;
}

/* 自訂下拉選單：隱藏原生箭頭，改用內嵌 chevron 圖示 */
select.field__input {
  appearance: none;
  -webkit-appearance: none;
  padding-inline-end: 2.75rem;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='none'%3E%3Cpath d='M4 6l4 4 4-4' stroke='%234F6A80' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.875rem center;
  background-size: 1rem;
  cursor: pointer;
}

select.field__input:focus-visible {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='none'%3E%3Cpath d='M4 6l4 4 4-4' stroke='%231266C2' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
}

/* 自訂檔案輸入：原生選擇鈕改為次要膠囊按鈕 */
input[type="file"].field__input {
  padding: var(--space-2);
  cursor: pointer;
}

input[type="file"].field__input::file-selector-button {
  appearance: none;
  border: 1px solid var(--color-blue);
  background: var(--color-white);
  color: var(--color-blue);
  font: inherit;
  font-size: 0.9375rem;
  font-weight: 700;
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-pill);
  margin-inline-end: var(--space-3);
  cursor: pointer;
  transition: background-color var(--transition-fast);
}

input[type="file"].field__input::file-selector-button:hover {
  background: rgba(18, 102, 194, 0.08);
}

.check-field {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  margin-block-start: var(--space-6);
  cursor: pointer;
}

/* 自訂核取方塊：白底方框→勾選轉為科技藍實底＋白勾 */
.check-field input[type="checkbox"] {
  appearance: none;
  -webkit-appearance: none;
  inline-size: 1.375rem;
  block-size: 1.375rem;
  flex-shrink: 0;
  margin-block-start: 0.1rem;
  display: grid;
  place-items: center;
  background: var(--color-white);
  border: 1.5px solid #A8C3DE;
  border-radius: 6px;
  cursor: pointer;
  transition: background-color var(--transition-fast), border-color var(--transition-fast),
    box-shadow var(--transition-fast);
}

.check-field input[type="checkbox"]::after {
  content: "";
  inline-size: 0.75rem;
  block-size: 0.75rem;
  transform: scale(0);
  clip-path: polygon(14% 44%, 0 65%, 50% 100%, 100% 16%, 82% 0%, 43% 60%);
  background: var(--color-white);
  transition: transform var(--transition-fast);
}

.check-field input[type="checkbox"]:hover {
  border-color: var(--color-blue);
}

.check-field input[type="checkbox"]:checked {
  background: var(--color-blue);
  border-color: var(--color-blue);
}

.check-field input[type="checkbox"]:checked::after {
  transform: scale(1);
}

.check-field input[type="checkbox"]:focus-visible {
  outline: none;
  border-color: var(--color-blue);
  box-shadow: var(--shadow-focus);
}

.form-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-4);
  margin-block-start: var(--space-8);
}

.form-status {
  color: var(--color-success);
  font-size: 0.9375rem;
  font-weight: 700;
}

.form-status--dark {
  color: var(--color-cyan);
}

.upload-list {
  display: grid;
  gap: var(--space-3);
  padding: 0;
  list-style: none;
}

.upload-item {
  display: grid;
  gap: var(--space-4);
  padding-block: var(--space-6);
  border-block-end: 1px solid var(--color-line);
}

.upload-item:first-child {
  padding-block-start: 0;
}

.upload-item:last-child {
  padding-block-end: 0;
  border-block-end: 0;
}

.upload-item__info {
  display: flex;
  gap: var(--space-4);
}

.upload-item__number {
  color: var(--color-blue);
  font-family: var(--font-mono);
  font-size: 1.125rem;
  font-weight: 700;
}

.upload-item__info h3 {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  font-size: 1.0625rem;
}

.upload-item__info p,
.upload-item__status {
  color: var(--color-text-muted);
  font-size: 0.875rem;
  margin-block-start: var(--space-1);
}

.upload-item__control {
  display: grid;
  gap: var(--space-2);
  justify-items: start;
}

.file-picker {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-block-size: 44px;
  padding-inline: var(--space-6);
  color: var(--color-blue);
  background: var(--color-white);
  border: 1px solid var(--color-blue);
  border-radius: var(--radius-pill);
  font-weight: 700;
  cursor: pointer;
  transition: background-color var(--transition-fast), box-shadow var(--transition-fast);
}

.file-picker:hover,
.file-picker:focus-within {
  background: rgba(18, 102, 194, 0.08);
}

.file-picker:focus-within {
  outline: none;
  box-shadow: var(--shadow-focus);
}

.file-picker input {
  position: absolute;
  inline-size: 1px;
  block-size: 1px;
  overflow: hidden;
  opacity: 0;
}

.file-picker.is-locked {
  color: var(--color-text-muted);
  border-color: var(--color-line);
  background: var(--color-surface);
  cursor: not-allowed;
}

.check-list {
  display: grid;
  gap: var(--space-3);
  padding: 0;
  margin-block-start: var(--space-6);
  list-style: none;
}

.check-list li {
  position: relative;
  padding-inline-start: 1.75rem;
  color: var(--color-text-muted-on-dark);
}

.check-list li::before {
  content: "!";
  position: absolute;
  inset-inline-start: 0;
  inline-size: 1.25rem;
  block-size: 1.25rem;
  display: grid;
  place-items: center;
  border: 1px solid var(--color-amber);
  border-radius: 50%;
  color: var(--color-amber);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
}

.check-list li.is-complete {
  color: var(--color-text-on-dark);
}

.check-list li.is-complete::before {
  content: "✓";
  color: var(--color-cyan);
  border-color: var(--color-cyan);
}

.result-card {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  padding: clamp(var(--space-6), 4vw, var(--space-8));
  background: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-container);
}

.result-card h3 {
  margin-block-start: var(--space-1);
  font-size: 1.5rem;
}

.result-card h3 + p {
  margin-block-start: var(--space-2);
  color: var(--color-text-muted);
  max-inline-size: 52ch;
}

/* --------------------------------------------------------------------------
   15. CTA 帶狀區
   -------------------------------------------------------------------------- */
.cta-band {
  background: var(--color-ink-950);
  color: var(--color-text-on-dark);
  position: relative;
  overflow: hidden;
}

.cta-band::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 50% 80% at 85% 50%, rgba(66, 224, 208, 0.1), transparent 70%);
}

.cta-band__inner {
  position: relative;
  padding-block: clamp(var(--space-12), 7vw, var(--space-16));
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
}

.cta-band__title {
  font-size: clamp(1.5rem, 2.5vw, 2rem);
}

.cta-band__desc {
  color: var(--color-text-muted-on-dark);
  margin-block-start: var(--space-2);
}

/* --------------------------------------------------------------------------
   16. 頁尾
   -------------------------------------------------------------------------- */
.site-footer {
  background: var(--color-ink-950);
  color: var(--color-text-muted-on-dark);
  font-size: 0.9375rem;
}

/* 頁尾頂端的青綠識別線 */
.site-footer::before {
  content: "";
  display: block;
  block-size: 5px;
  background: var(--color-cyan);
}

.site-footer__inner {
  padding-block: clamp(var(--space-12), 6vw, var(--space-16)) var(--space-8);
  display: grid;
  gap: var(--space-8);
}

.site-footer__brand .brand__text small {
  max-inline-size: 24rem;
  white-space: normal;
}

.site-footer h2 {
  font-size: 0.875rem;
  font-family: var(--font-mono);
  letter-spacing: 0.1em;
  color: var(--color-text-on-dark);
  margin-block-end: var(--space-3);
}

.site-footer ul {
  list-style: none;
  padding: 0;
  display: grid;
  gap: var(--space-2);
}

.site-footer a {
  color: var(--color-text-muted-on-dark);
  text-decoration: none;
  min-block-size: 32px;
  display: inline-flex;
  align-items: center;
}

.site-footer a:hover,
.site-footer a:focus-visible {
  color: var(--color-cyan);
  text-decoration: underline;
}

.site-footer__bottom {
  border-block-start: 1px solid var(--color-line-on-dark);
  padding-block: var(--space-6);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-6);
  justify-content: space-between;
  font-size: 0.8125rem;
}

/* --------------------------------------------------------------------------
   16b. Demo 狀態提示（靜態 demo 用）
   -------------------------------------------------------------------------- */
.demo-status {
  position: fixed;
  inset-block-end: var(--space-4);
  inset-inline-start: 50%;
  transform: translateX(-50%);
  z-index: 60;
  max-inline-size: min(calc(100% - 2rem), 32rem);
  padding: var(--space-3) var(--space-6);
  background: var(--color-ink-800);
  color: var(--color-text-on-dark);
  border: 1px solid var(--color-line-on-dark);
  border-radius: var(--radius-card);
  font-size: 0.9375rem;
  text-align: center;
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.demo-status:not(:empty) {
  opacity: 1;
}

/* --------------------------------------------------------------------------
   17. 進場動態
   -------------------------------------------------------------------------- */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity var(--transition-enter), transform var(--transition-enter);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* JS 未載入時維持可見 */
.no-js .reveal {
  opacity: 1;
  transform: none;
}

/* --------------------------------------------------------------------------
   18. 響應式
   -------------------------------------------------------------------------- */

/* Mobile 導覽（< 64rem） */
@media (max-width: 63.9375rem) {
  .nav-toggle {
    display: inline-flex;
  }

  /* 行動版選單:掛在膠囊下緣的圓角面板,寬度與膠囊對齊 */
  .site-header__inner {
    position: relative;
  }

  .site-nav {
    display: none;
    position: absolute;
    inset-inline: 0;
    inset-block-start: calc(100% + var(--space-2));
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--color-white);
    border: 1px solid var(--color-line);
    border-radius: var(--radius-container);
    box-shadow: 0 0.5rem 1.5rem rgba(18, 40, 60, 0.1);
    padding: var(--space-4);
  }

  .site-header.nav-open .site-nav {
    display: flex;
  }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .site-nav__link {
    min-block-size: 48px;
    border-block-end: 0;
    border-inline-start: 2px solid transparent;
    padding-inline: var(--space-4);
  }

  .site-nav__link[aria-current="page"] {
    border-inline-start-color: var(--color-blue);
    background: rgba(18, 102, 194, 0.06);
  }

  /* 行動版：首頁子選單以縮排方式常駐顯示 */
  .site-nav__caret {
    display: none;
  }

  .site-nav__sub a {
    padding-inline-start: var(--space-8);
    min-block-size: 44px;
  }

  .site-nav .btn {
    margin-block-start: var(--space-4);
  }
}

@media (max-width: 29.999rem) {
  .hero__inner {
    padding-block: var(--space-12);
  }

  .hero__title {
    font-size: clamp(2.2rem, 10.5vw, 2.5rem);
    line-height: 1.13;
  }

  .hero__subtitle,
  .page-hero__lede {
    font-size: 1rem;
  }

  .hero__dates {
    inline-size: 100%;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-4);
    padding: var(--space-4);
  }

  .hero__actions {
    gap: var(--space-3);
  }

  .hero__actions .btn {
    flex: 1 1 calc(50% - var(--space-3));
    padding-inline: var(--space-4);
  }

  .portal-local-nav {
    border-radius: var(--radius-card);
  }
}

/* ~480px */
@media (min-width: 30rem) {
  .gallery-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Tablet ~768px：8 欄概念，雙欄卡片 */
@media (min-width: 48rem) {
  .card-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .form-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .form-grid__wide {
    grid-column: 1 / -1;
  }

  .status-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .upload-item {
    grid-template-columns: minmax(0, 1fr) minmax(14rem, 0.7fr);
    align-items: center;
  }

  .steps {
    grid-template-columns: repeat(2, 1fr);
  }

  .portal-preview {
    grid-template-columns: 1fr auto;
  }

  .site-footer__inner {
    grid-template-columns: 1.5fr 1fr 1fr;
  }
}

/* Desktop ~1024px：12 欄概念 */
@media (min-width: 64rem) {
  /* 桌機版：首頁子選單改為下拉，hover 或鍵盤 focus 皆可開啟 */
  .site-nav__sub {
    display: none;
    position: absolute;
    inset-block-start: 100%;
    inset-inline-start: 0;
    min-inline-size: 11rem;
    background: var(--color-white);
    border: 1px solid var(--color-line);
    border-radius: var(--radius-card);
    box-shadow: 0 0.75rem 2rem rgba(18, 40, 60, 0.14);
    padding: var(--space-2);
    z-index: 60;
  }

  .site-nav__item--has-sub:hover .site-nav__sub,
  .site-nav__item--has-sub:focus-within .site-nav__sub {
    display: block;
  }

  .portal-layout {
    grid-template-columns: minmax(16rem, 4fr) minmax(0, 8fr);
  }

  .card-grid--3 {
    grid-template-columns: repeat(3, 1fr);
  }

  .card-grid--4 {
    grid-template-columns: repeat(4, 1fr);
  }

  .gallery-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  /* Timeline 桌機水平版 */
  .timeline--horizontal {
    grid-template-columns: repeat(5, 1fr);
    gap: var(--space-4);
  }

  .timeline--horizontal::before {
    inset-inline: 0.75rem;
    inset-block-start: 0.5625rem;
    inset-block-end: auto;
    inline-size: auto;
    block-size: 2px;
  }

  .timeline--horizontal .timeline__item {
    padding-inline-start: 0;
    padding-block-start: var(--space-8);
  }

  .timeline--horizontal .timeline__dot {
    inset-block-start: 0;
    inset-inline-start: 0;
  }
}

/* Wide ~1280px：增加留白 */
@media (min-width: 80rem) {
  .section {
    padding-block: var(--space-24);
  }
}

/* --------------------------------------------------------------------------
   18.5 0806 新增元件
   -------------------------------------------------------------------------- */

.card__eyebrow {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
}

/* 儀表讀數：關鍵數字（日期、獎金、時程）統一使用展示字體＋等寬數字 */
.hero__date-value,
.hero__prize-value,
.prize-card__value,
.prize-total__value,
.prize-inline,
.timeline__date,
.news-item__date {
  font-family: var(--font-display);
  font-feature-settings: "tnum";
}

/* 獎勵摘要（依主辦回饋：獎金需放大、更醒目） */
.prize-card__value {
  font-size: clamp(2.25rem, 3.5vw, 3rem);
  font-weight: 900;
  line-height: 1.1;
  color: var(--color-warm);
  font-variant-numeric: tabular-nums;
}

/* 獎金未公告時的降級標示:小型 badge,不佔 display 級版面 */
.prize-card__badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35em;
  margin-block-start: var(--space-2);
  padding: 0.3em 0.75em;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-pill);
  background: var(--color-surface);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.prize-total {
  margin-block-start: var(--space-8);
  padding: clamp(var(--space-6), 4vw, var(--space-8));
  border-radius: var(--radius-container);
  background: linear-gradient(120deg, var(--color-ink-900), var(--color-blue));
  color: var(--color-text-on-dark);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.prize-total__value {
  display: inline-block;
  font-size: clamp(2.75rem, 5.5vw, 4rem);
  font-weight: 900;
  line-height: 1.05;
  color: var(--color-amber);
  font-variant-numeric: tabular-nums;
}

.prize-total__note {
  font-size: 0.875rem;
  color: var(--color-text-muted-on-dark);
  flex-basis: 100%;
}

/* 總獎金橫幅：置於區塊之間的全幅醒目帶 */
.prize-banner {
  background: linear-gradient(100deg, #FFF6E8 0%, #FFE9C4 55%, #FFD9A0 100%);
  border-block: 1px solid rgba(221, 102, 15, 0.22);
}

.prize-banner__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6) var(--space-8);
  padding-block: clamp(var(--space-8), 5vw, var(--space-12));
}

.prize-banner__text {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: var(--space-3) var(--space-4);
}

.prize-banner__label {
  font-size: clamp(1.125rem, 2vw, 1.5rem);
  font-weight: 700;
  color: #7C430A;
}

.prize-banner__value {
  font-family: var(--font-display);
  font-feature-settings: "tnum";
  font-size: clamp(3rem, 7vw, 4.75rem);
  font-weight: 900;
  line-height: 1;
  color: var(--color-warm);
  letter-spacing: 0.01em;
}

.prize-banner__side {
  display: grid;
  gap: var(--space-2);
  justify-items: start;
}

.prize-banner__note {
  font-size: 0.8125rem;
  color: #8A5A22;
}

/* Hero 獎金橫幅：首屏即見的總獎金強調帶 */
.hero__prize {
  display: inline-flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--space-2) var(--space-3);
  margin-block-start: var(--space-6);
  padding: var(--space-4) var(--space-6);
  border-radius: var(--radius-card);
  background: linear-gradient(120deg, #FFF6E8, #FFE9C4);
  border: 1px solid rgba(221, 102, 15, 0.35);
  box-shadow: 0 0.5rem 1.5rem rgba(221, 102, 15, 0.12);
}

.hero__prize-label {
  font-weight: 700;
  font-size: clamp(1rem, 1.5vw, 1.25rem);
  color: #7C430A;
}

.hero__prize-value {
  font-size: clamp(2.25rem, 5vw, 3.25rem);
  font-weight: 900;
  line-height: 1.05;
  color: var(--color-warm);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.01em;
}

.hero__prize-note {
  flex-basis: 100%;
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

/* 內文金額強調（競賽頁各項獎金） */
.prize-inline {
  font-weight: 900;
  font-size: 1.35em;
  color: var(--color-warm);
  font-variant-numeric: tabular-nums;
}

/* 報名平台路由卡 */
.route-card__platform {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.card__actions {
  margin-block-start: var(--space-2);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  align-items: center;
}

/* 卡片內按鈕列固定貼齊底部，同列卡片對齊不受文字行數影響 */
.card > .card__actions {
  margin-block-start: auto;
}

.external-hint {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

/* 鎖定狀態面板（比賽檔案上傳：資格檢核通過後開放） */
.locked-panel {
  display: flex;
  gap: var(--space-4);
  align-items: flex-start;
  padding: var(--space-6);
  border: 1px dashed var(--color-line);
  border-radius: var(--radius-card);
  background: var(--color-white);
  color: var(--color-text-muted);
}

.locked-panel__icon {
  flex-shrink: 0;
  inline-size: 2.5rem;
  block-size: 2.5rem;
  display: grid;
  place-items: center;
  border-radius: var(--radius-control);
  background: var(--color-sky);
  color: var(--color-blue);
}

.locked-panel__icon svg {
  inline-size: 1.375rem;
  block-size: 1.375rem;
}

/* 單位清單（主辦／執行／協辦） */
.unit-list {
  list-style: none;
  padding: 0;
  background: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-container);
  overflow: hidden;
}

.unit-item {
  display: grid;
  grid-template-columns: 1fr;
  align-items: baseline;
  gap: var(--space-1) var(--space-6);
  padding: var(--space-4) var(--space-6);
}

.unit-item + .unit-item {
  border-block-start: 1px solid var(--color-line);
}

@media (min-width: 48rem) {
  .unit-item {
    grid-template-columns: minmax(8rem, 11rem) minmax(0, 1fr);
  }
}

.unit-item__role {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
  color: var(--color-defense);
  flex-shrink: 0;
}

.unit-item__name {
  font-weight: 700;
}

/* 頁尾單位列 */
.site-footer__units {
  margin-block-start: var(--space-4);
  font-size: 0.875rem;
  line-height: 2;
}

/* 標籤補充色 */
.tag--draft  { color: #A34D0B; background: rgba(221, 102, 15, 0.1); }
.tag--forum  { color: var(--color-purple); background: rgba(108, 87, 201, 0.1); }
.tag--green  { color: var(--color-defense); background: rgba(70, 104, 79, 0.1); }

/* 狀態說明列（報名狀態六態） */
.status-legend {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  list-style: none;
  padding: 0;
}

.status-legend li {
  padding: var(--space-1) var(--space-3);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-pill);
  background: var(--color-white);
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

/* --------------------------------------------------------------------------
   18.6 白晝任務簡報：細修層
   -------------------------------------------------------------------------- */

/* 儀表標籤統一字重（Chakra Petch 載入 500–700，避免合成細字） */
.section-eyebrow,
.page-hero__eyebrow,
.hero__tagline,
.card__eyebrow,
.portal-entry-card__eyebrow,
.hero__date-label,
.unit-item__role {
  font-weight: 600;
}

/* 頁內導覽：hover／current 膠囊底 */
.portal-local-nav a {
  border-radius: var(--radius-pill);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.portal-local-nav a:hover,
.portal-local-nav a:focus-visible {
  background: var(--color-sky);
  color: var(--color-blue-deep);
}

/* 分頁內子區塊：以細線分隔的第二主題 */
.panel-subsection {
  margin-block-start: var(--space-12);
  padding-block-start: var(--space-12);
  border-block-start: 1px solid var(--color-line);
}

.section-title--sub {
  font-size: clamp(1.375rem, 2.2vw, 1.875rem);
}

/* 單位 Logo 條 */
.logo-strip {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-6);
  margin-block-start: var(--space-8);
}

.logo-chip {
  display: grid;
  gap: var(--space-2);
  justify-items: center;
}

.logo-chip__box {
  inline-size: 9rem;
  block-size: 8rem;
  display: grid;
  place-items: center;
  background: var(--color-ink-950);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.logo-chip__box img {
  block-size: 6.75rem;
  inline-size: auto;
  max-inline-size: 88%;
  object-fit: contain;
}

.logo-chip__label {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.logo-chip--pending .logo-chip__box {
  background: var(--color-white);
  border-style: dashed;
  color: var(--color-text-muted);
  font-size: 0.8125rem;
}

/* 內容分頁（tabs）：Stripe 式底線分頁列，貼齊 page-hero 下緣 */
/* 分頁列:全幅白底長條,不吸頂,隨內容捲動 */
.tab-bar {
  background: var(--color-white);
  border-block-end: 1px solid var(--color-line);
}

.tab-bar__inner {
  display: flex;
  gap: var(--space-1);
  overflow-x: auto;
  scrollbar-width: thin;
}

/* 錨點捲動時,別讓標題躲進懸浮導覽後面 */
[role="tabpanel"],
.section[id],
.panel-subsection[id] {
  scroll-margin-block-start: calc(var(--nav-clearance) + var(--space-4));
}

.tab {
  appearance: none;
  background: none;
  border: 0;
  cursor: pointer;
  font: inherit;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text-muted);
  padding: var(--space-4) var(--space-3);
  min-block-size: 48px;
  white-space: nowrap;
  border-block-end: 2px solid transparent;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.tab:hover {
  color: var(--color-text);
}

.tab[aria-selected="true"] {
  color: var(--color-blue);
  border-block-end-color: var(--color-blue);
  font-weight: 700;
}

.tab:focus-visible {
  outline: 2px solid var(--color-blue);
  outline-offset: -3px;
  border-radius: var(--radius-control);
}

/* 分頁面板：統一背景與收斂的上下留白 */
[role="tabpanel"].section {
  background: transparent;
  border-block: 0;
  padding-block: clamp(var(--space-8), 5vw, var(--space-12));
}

/* 卡片照片頭圖（八大主題等）：滿版出血＋淡藍色調統一 */
.card__media {
  position: relative;
  margin: calc(-1 * var(--space-6)) calc(-1 * var(--space-6)) var(--space-2);
  block-size: 8.5rem;
  overflow: hidden;
  border-radius: calc(var(--radius-card) - 3px) calc(var(--radius-card) - 3px) 0 0;
}

.card__media img {
  inline-size: 100%;
  block-size: 100%;
  object-fit: cover;
  transition: transform var(--transition-enter);
}

.card__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(16, 55, 96, 0.14), rgba(16, 55, 96, 0) 60%);
}

.card:hover .card__media img {
  transform: scale(1.04);
}

/* 全幅照片帶（首頁決賽現場） */
.photo-band {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  color: var(--color-text-on-dark);
}

.photo-band__photo {
  position: absolute;
  inset: 0;
  z-index: -1;
}

.photo-band__photo img {
  inline-size: 100%;
  block-size: 100%;
  object-fit: cover;
}

.photo-band__photo::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(100deg, rgba(13, 46, 82, 0.9) 0%, rgba(18, 102, 194, 0.72) 55%, rgba(18, 102, 194, 0.5) 100%);
}

.photo-band__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  padding-block: clamp(var(--space-16), 10vw, var(--space-24));
}

.photo-band__eyebrow {
  font-family: var(--font-display);
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--color-cyan);
  margin-block-end: var(--space-2);
}

.photo-band__title {
  font-size: clamp(1.5rem, 2.8vw, 2.25rem);
}

.photo-band__desc {
  margin-block-start: var(--space-3);
  color: var(--color-text-muted-on-dark);
  max-width: 44ch;
}

.photo-band__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

/* 活動時程雙欄：左時間軸、右決賽程序表（填滿桌機留白） */
.schedule-layout {
  display: grid;
  gap: var(--space-8);
  align-items: start;
}

.schedule-side {
  display: grid;
  gap: var(--space-6);
}

@media (min-width: 64rem) {
  .schedule-layout {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: var(--space-12);
  }

  /* 右欄跟著視窗捲動,補齊與長時間軸的高度差 */
  .schedule-side {
    position: sticky;
    inset-block-start: calc(var(--nav-clearance) + var(--space-4));
  }
}

/* FAQ 手風琴：details/summary 自訂樣式（非瀏覽器預設外觀） */
.faq-layout {
  display: grid;
  gap: var(--space-8);
}

.faq-list {
  display: grid;
  gap: var(--space-4);
}

.faq-item {
  background: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-container);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.faq-item:hover {
  border-color: #A8C3DE;
}

.faq-item[open] {
  border-color: rgba(18, 102, 194, 0.3);
  box-shadow: var(--shadow-md);
}

.faq-item summary {
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  padding: var(--space-6) var(--space-8);
  font-size: 1.0625rem;
  font-weight: 700;
  cursor: pointer;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary:focus-visible {
  outline: 2px solid var(--color-blue);
  outline-offset: -2px;
  border-radius: inherit;
}

.faq-item__icon {
  flex-shrink: 0;
  inline-size: 1.75rem;
  block-size: 1.75rem;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--color-sky);
  color: var(--color-blue);
  transition: transform var(--transition-fast), background-color var(--transition-fast),
    color var(--transition-fast);
}

.faq-item__icon svg {
  inline-size: 0.875rem;
  block-size: 0.875rem;
}

/* 展開時：加號旋轉 45 度成 ×，圓底轉實心藍 */
.faq-item[open] .faq-item__icon {
  transform: rotate(45deg);
  background: var(--color-blue);
  color: var(--color-white);
}

/* 展開時：問答之間以全寬細線分隔 */
.faq-item[open] summary {
  border-block-end: 1px solid var(--color-line);
}

.faq-item__answer {
  padding: var(--space-5) var(--space-8) var(--space-8);
  color: var(--color-text-muted);
  line-height: 1.9;
  max-width: 68ch;
}

.faq-item[open] .faq-item__answer {
  animation: faq-reveal 240ms ease-out;
}

@keyframes faq-reveal {
  from {
    opacity: 0;
    translate: 0 -4px;
  }
}

@media (min-width: 64rem) {
  .faq-layout {
    grid-template-columns: minmax(16rem, 4fr) minmax(0, 8fr);
    align-items: start;
  }

  /* 左欄標題黏著，右欄清單捲動 */
  .faq-layout > .section-header {
    position: sticky;
    inset-block-start: 9.5rem;
    margin-block-end: 0;
  }
}

/* 內頁 hero 照片：藍色雙色調覆蓋，維持明亮科技藍基調與文字對比 */
.page-hero__photo {
  position: absolute;
  inset: 0;
  z-index: -3;
}

.page-hero__photo img {
  inline-size: 100%;
  block-size: 100%;
  object-fit: cover;
}

.page-hero__photo::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(13, 46, 82, 0.92) 0%, rgba(18, 102, 194, 0.82) 60%, rgba(18, 102, 194, 0.66) 100%);
}

/* --------------------------------------------------------------------------
   19. Reduced Motion
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}

/* --------------------------------------------------------------------------
   19. 會員登入（展示模式）：導覽列入口、專區登入關卡與登入狀態
   -------------------------------------------------------------------------- */
/* 導覽列「登入」與「馬上報名」兩鈕間距收窄一點 */
.site-nav [data-auth-entry] {
  margin-inline-end: calc(-1 * var(--space-3));
}

@media (max-width: 63.9375rem) {
  .site-nav [data-auth-entry] {
    margin-inline-end: 0;
  }
}

/* 文內分頁跳轉按鈕（帳號頁「註冊帳號」） */
.link-button {
  appearance: none;
  background: none;
  border: 0;
  padding: 0;
  font: inherit;
  color: var(--color-blue);
  text-decoration: underline;
  text-underline-offset: 0.2em;
  cursor: pointer;
}

.link-button:hover,
.link-button:focus-visible {
  color: var(--color-blue-deep);
}

/* 專區工具列的登入狀態與登出 */
.portal-session {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

/* 參賽者專區登入關卡標題（沿用鎖定面板，但標題需為深色主文字） */
#portal-auth-gate h2 {
  margin: 0;
  font-size: 1.25rem;
  color: var(--color-text);
}

/* 會員登入頁：左圖（標題）右卡分割版型，無 page-hero */
.auth-section {
  padding-block: clamp(var(--space-8), 5vw, var(--space-16));
}

.auth-split {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
  max-inline-size: 64rem;
  margin-inline: auto;
  background: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-container);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.auth-split__visual {
  position: relative;
  display: flex;
}

.auth-split__visual img {
  position: absolute;
  inset: 0;
  inline-size: 100%;
  block-size: 100%;
  object-fit: cover;
}

.auth-split__visual::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(165deg, rgba(10, 43, 77, 0.6), rgba(10, 43, 77, 0.9));
}

.auth-split__copy {
  position: relative;
  z-index: 1;
  align-self: center;
  padding: clamp(var(--space-6), 4vw, var(--space-12));
  color: var(--color-text-on-dark);
}

.auth-split__eyebrow {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  letter-spacing: 0.14em;
  color: var(--color-cyan);
  margin-block-end: var(--space-2);
}

.auth-split__title {
  font-size: clamp(1.75rem, 2.6vw, 2.25rem);
  line-height: 1.25;
}

.auth-split__lede {
  margin-block-start: var(--space-4);
  color: var(--color-text-muted-on-dark);
  line-height: 1.75;
}

.auth-split__panel {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  padding: clamp(var(--space-6), 4vw, var(--space-12));
}

/* 登入／註冊切換 segment（卡片上方） */
.auth-seg {
  display: flex;
  gap: var(--space-1);
  padding: var(--space-1);
  background: var(--color-sky);
  border-radius: var(--radius-pill);
}

.auth-seg__btn {
  appearance: none;
  border: 0;
  background: none;
  flex: 1;
  min-block-size: 44px;
  border-radius: var(--radius-pill);
  font: inherit;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text-muted);
  cursor: pointer;
  transition: background-color var(--transition-fast), color var(--transition-fast),
    box-shadow var(--transition-fast);
}

.auth-seg__btn:hover {
  color: var(--color-text);
}

.auth-seg__btn[aria-selected="true"] {
  background: var(--color-white);
  color: var(--color-blue);
  font-weight: 700;
  box-shadow: var(--shadow-sm);
}

.auth-seg__btn:focus-visible {
  outline: 2px solid var(--color-blue);
  outline-offset: 2px;
}

.auth-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.auth-form .btn {
  inline-size: 100%;
  margin-block-start: var(--space-2);
}

.auth-form .form-status {
  margin: 0;
  text-align: center;
}

/* 已登入狀態卡 */
.auth-session {
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  background: var(--color-surface);
  padding: var(--space-6);
}

.auth-session h2 {
  font-size: 1.125rem;
  margin-block-end: var(--space-2);
}

.auth-session p {
  color: var(--color-text-muted);
  margin-block-end: var(--space-4);
}

@media (max-width: 47.9375rem) {
  .auth-split {
    grid-template-columns: 1fr;
  }

  .auth-split__visual {
    min-block-size: 12rem;
  }
}

/* 外部報名平台確認彈窗（即將離開本站） */
.external-modal {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: grid;
  place-items: center;
  padding: var(--space-6);
  background: rgba(10, 43, 77, 0.5);
  backdrop-filter: blur(4px);
}

.external-modal[hidden] {
  display: none;
}

.external-modal__card {
  background: var(--color-white);
  border-radius: var(--radius-container);
  box-shadow: var(--shadow-md);
  padding: var(--space-8);
  max-inline-size: 26rem;
}

.external-modal__card h2 {
  font-size: 1.25rem;
  margin-block-end: var(--space-3);
}

.external-modal__desc {
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-block-end: var(--space-6);
}

.external-modal__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

@media (prefers-reduced-motion: no-preference) {
  .external-modal:not([hidden]) .external-modal__card {
    animation: external-modal-pop 200ms ease-out;
  }
}

@keyframes external-modal-pop {
  from {
    opacity: 0;
    transform: translateY(8px) scale(0.98);
  }
}