/* ==========================================================================
   layout：頁首、導覽、手機抽屜、游標、頁尾、LINE 按鈕
   ========================================================================== */

/* ── 頁首 ─────────────────────────────────────────────── */
.site-header {
  position: fixed; inset: 0 0 auto; z-index: 60;
  height: var(--header-h);
  color: var(--fg);
  transition: transform var(--m-slow) var(--ease-wind), color var(--m-base) var(--m-ease);
}
.site-header::before {
  content: ""; position: absolute; inset: 0; z-index: -1;
  background: color-mix(in srgb, var(--bg) 72%, transparent);
  backdrop-filter: blur(14px) saturate(1.2);
  -webkit-backdrop-filter: blur(14px) saturate(1.2);
  border-bottom: 1px solid var(--line);
  opacity: 0;
  transition: opacity var(--m-base) var(--m-ease);
}
.site-header.is-scrolled::before { opacity: 1; }
.site-header.is-hidden { transform: translateY(-100%); }
.site-header__inner {
  height: 100%;
  max-width: var(--max); margin-inline: auto; padding-inline: var(--gutter);
  display: flex; align-items: center; gap: 24px;
}

/* Logo 一律維持品牌原色（不可改色）；深色區塊時墊米白底板，原色才看得清楚 */
.brand {
  display: block; flex: none;
  width: 156px;
  padding: 7px 14px;
  border-radius: 12px;
  background: #ffffff;
  box-shadow: 0 0 0 1px rgba(11, 24, 48, .06);
}
.brand .logo-svg { width: 100%; height: auto; }
@media (max-width: 767px) { .brand { width: 118px; padding: 5px 10px; border-radius: 10px; } }
.logo-word { fill: #0f1f3e; }
.logo-mark { fill: #004580; }

/* 桌機導覽 */
.nav { display: none; margin-left: auto; }
@media (min-width: 1180px) { .nav { display: block; } }
.nav__list { display: flex; align-items: center; gap: 4px; }
.nav__item { position: relative; display: flex; align-items: center; }
.nav__link {
  position: relative;
  padding: 10px 12px;
  font-size: .925rem; font-weight: 500; letter-spacing: .06em;
}
.nav__link::after {
  content: ""; position: absolute; left: 12px; right: 12px; bottom: 4px; height: 1px;
  background: currentColor; transform: scaleX(0); transform-origin: right;
  transition: transform var(--m-base) var(--m-ease);
}
.nav__link.is-active::after { transform: scaleX(1); background: var(--brand); }
@media (hover: hover) {
  .nav__link:hover::after { transform: scaleX(1); transform-origin: left; }
}
.nav__sub-toggle { width: 24px; height: 32px; margin-left: -8px; display: grid; place-items: center; color: var(--muted); }
.nav__sub-toggle .icon { transition: transform var(--m-base) var(--m-ease); }
.nav__sub {
  position: absolute; top: calc(100% + 6px); left: 0;
  min-width: 220px; padding: 10px;
  background: var(--ink-2); color: var(--paper);
  border: 1px solid rgba(245, 247, 250, .1);
  border-radius: 16px;
  box-shadow: 0 24px 60px rgba(0, 0, 0, .35);
  opacity: 0; visibility: hidden; transform: translateY(-6px);
  transition: opacity var(--m-fast) var(--m-ease-in), transform var(--m-fast) var(--m-ease-in), visibility 0s var(--m-fast);
}
.nav__sub a {
  display: block; padding: 10px 14px; border-radius: 10px;
  font-size: .925rem; color: rgba(245, 247, 250, .78);
  transition: background var(--m-fast) var(--m-ease), color var(--m-fast) var(--m-ease);
}
.nav__sub a:hover, .nav__sub a:focus-visible { background: rgba(245, 247, 250, .07); color: var(--paper); }
.nav__item.is-open .nav__sub,
.nav__item:focus-within .nav__sub {
  opacity: 1; visibility: visible; transform: none;
  transition: opacity var(--m-base) var(--m-ease-out), transform var(--m-base) var(--m-ease-out);
}
@media (hover: hover) {
  .nav__item.has-sub:hover .nav__sub {
    opacity: 1; visibility: visible; transform: none;
    transition: opacity var(--m-base) var(--m-ease-out), transform var(--m-base) var(--m-ease-out);
  }
  .nav__item.has-sub:hover .nav__sub-toggle .icon { transform: rotate(180deg); }
}
.nav__item.is-open .nav__sub-toggle .icon { transform: rotate(180deg); }

.header-actions { display: flex; align-items: center; gap: 10px; margin-left: auto; }
@media (min-width: 1180px) { .header-actions { margin-left: 16px; } }
.header-actions .btn--ghost { --btn-fg: var(--fg); } /* 只改預設字色；hover 時沿用 .btn:hover 的反白字色，避免白底白字 */

.menu-toggle {
  width: 44px; height: 44px; border-radius: 50%;
  display: grid; place-items: center;
  box-shadow: inset 0 0 0 1px var(--line-strong);
}
.menu-toggle__bars { display: grid; gap: 6px; width: 18px; }
.menu-toggle__bars span { height: 1.5px; background: currentColor; border-radius: 2px; }
.menu-toggle__bars span:last-child { width: 60%; justify-self: end; }
@media (min-width: 1180px) { .menu-toggle { display: none; } }

/* ── 手機抽屜（ui-motion 的 m-drawer，改成右側、全高、深色） ── */
.drawer-overlay { background: rgba(4, 10, 22, .62); z-index: 70; }
.drawer.m-drawer {
  left: auto; right: 0; width: min(92vw, 440px); z-index: 71;
  transform: translateX(100%);
  background: var(--ink-2); color: var(--paper);
  box-shadow: -10px 0 40px rgba(0, 0, 0, .4);
  display: flex; flex-direction: column;
  padding: 18px 24px calc(24px + env(safe-area-inset-bottom));
  --line: rgba(245, 247, 250, .12);
  --muted: rgba(245, 247, 250, .62);
  --accent-text: var(--brand);
  --line-strong: rgba(245, 247, 250, .3);
  --fg: var(--paper); --bg: var(--ink-2);
}
.drawer.m-drawer.is-open { transform: none; }
.drawer__head { display: flex; align-items: center; justify-content: space-between; min-height: 44px; }
.drawer__close { width: 44px; height: 44px; display: grid; place-items: center; border-radius: 50%; box-shadow: inset 0 0 0 1px var(--line-strong); }
.drawer__list { margin-top: 20px; }
.drawer__item { border-bottom: 1px solid var(--line); }
.drawer__row { display: flex; align-items: center; }
.drawer__link {
  flex: 1; display: flex; align-items: center; gap: 14px; min-height: 60px;
  padding: 8px 0;
  font-family: var(--font-serif); font-weight: 600; font-size: 1.45rem; line-height: 1.3;
}
.drawer__num { font-family: var(--font-mono); font-size: .7rem; color: var(--brand); letter-spacing: .1em; }
.drawer__toggle { width: 44px; height: 44px; display: grid; place-items: center; color: var(--muted); }
.drawer__toggle[aria-expanded="true"] .m-chevron { transform: rotate(180deg); }
.m-chevron { display: inline-grid; transition: transform var(--m-base) var(--m-ease); }
.drawer__sub { padding: 0 0 14px 34px; }
.drawer__sub a { display: block; padding: 9px 0; color: var(--muted); font-size: 1rem; }
.drawer__foot { margin-top: auto; padding-top: 28px; display: grid; gap: 10px; }
.drawer__contact { display: grid; gap: 8px; margin-top: 12px; font-size: .925rem; color: var(--muted); }
.drawer__contact a { display: inline-flex; align-items: center; gap: 10px; min-height: 36px; }

/* m-collapse 若 motion.css 未定義高度動畫，這裡保底 */
.m-collapse { display: grid; grid-template-rows: 0fr; transition: grid-template-rows var(--m-base) var(--m-ease); }
.m-collapse > * { overflow: hidden; }
.m-collapse.is-open { grid-template-rows: 1fr; }

/* ── 自訂游標（只在有滑鼠的裝置） ───────────────────────── */
.cursor { display: none; }
@media (hover: hover) and (pointer: fine) and (prefers-reduced-motion: no-preference) {
  .has-cursor .cursor { display: block; }
  .cursor { position: fixed; left: 0; top: 0; z-index: 95; pointer-events: none; mix-blend-mode: normal; }
  .cursor__dot {
    position: absolute; width: 6px; height: 6px; margin: -3px 0 0 -3px;
    border-radius: 50%; background: var(--brand);
  }
  .cursor__ring {
    position: absolute; width: 38px; height: 38px; margin: -19px 0 0 -19px;
    border-radius: 50%;
    border: 1px solid rgba(245, 247, 250, .5);
    display: grid; place-items: center;
    transition: width var(--m-base) var(--ease-wind), height var(--m-base) var(--ease-wind),
                margin var(--m-base) var(--ease-wind), background var(--m-base) var(--m-ease), border-color var(--m-base) var(--m-ease);
  }
  .cursor__text {
    font-family: var(--font-mono); font-size: .7rem; letter-spacing: .12em; color: var(--ink);
    opacity: 0; transition: opacity var(--m-fast) var(--m-ease);
    white-space: nowrap;
  }
  .cursor.is-label .cursor__ring { width: 92px; height: 92px; margin: -46px 0 0 -46px; background: var(--brand); border-color: transparent; }
  .cursor.is-label .cursor__text { opacity: 1; }
  .cursor.is-label .cursor__dot { opacity: 0; }
  .cursor.is-link .cursor__ring { width: 56px; height: 56px; margin: -28px 0 0 -28px; border-color: var(--brand); }
  .cursor.on-light .cursor__ring { border-color: rgba(11, 24, 48, .45); }
}

/* ── 麵包屑 ─────────────────────────────────────────────── */
.crumbs { font-size: .8rem; color: var(--muted); letter-spacing: .06em; }
.crumbs a { color: var(--muted); transition: color var(--m-fast) var(--m-ease); }
.crumbs a:hover { color: var(--fg); }
.crumbs .separator { margin: 0 .5em; opacity: .6; }
.crumbs .last { color: var(--fg); }

/* ── 頁尾 ─────────────────────────────────────────────── */
.site-footer { overflow: clip; }
.footer-cta { position: relative; isolation: isolate; overflow: clip; padding: clamp(72px, 9vw, 140px) 0 clamp(56px, 7vw, 100px); border-bottom: 1px solid var(--line); }
.footer-cta > .wrap { position: relative; }
.footer-cta__title {
  margin-top: 28px;
  font-family: var(--font-serif); font-weight: 900;
  font-size: var(--fs-h2); line-height: 1.12; letter-spacing: -.01em;
}
.footer-cta__row {
  margin-top: clamp(32px, 4vw, 64px);
  display: grid; gap: 28px;
}
@media (min-width: 900px) {
  .footer-cta__row { grid-template-columns: minmax(0, 1fr) auto; align-items: end; }
}
.footer-cta__text { max-width: 34em; color: var(--muted); font-size: var(--fs-lead); line-height: 1.7; }
.footer-cta__actions { display: flex; flex-wrap: wrap; gap: 12px; }

.footer-grid {
  padding-top: clamp(56px, 7vw, 100px);
  display: grid; gap: 40px 32px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
.footer-brand { grid-column: 1 / -1; }
.footer-brand p { margin-top: 18px; color: var(--muted); font-size: .95rem; line-height: 1.8; }
.footer-contact { grid-column: 1 / -1; }
@media (min-width: 900px) {
  .footer-grid { grid-template-columns: 1.3fr 1.6fr 1fr 1fr; }
  .footer-brand, .footer-contact { grid-column: auto; }
}
.brand--footer { width: 188px; }
.footer-col__title { font-family: var(--font-mono); font-size: var(--fs-mono); font-weight: 400; letter-spacing: .16em; color: var(--faint); margin-bottom: 16px; }
.footer-col ul { display: grid; gap: 4px; }
.footer-col a, .footer-contact span {
  display: inline-flex; align-items: flex-start; gap: 10px;
  min-height: 32px; padding: 3px 0;
  color: var(--muted); font-size: .95rem; line-height: 1.6;
  transition: color var(--m-fast) var(--m-ease);
}
.footer-contact { display: grid; align-content: start; gap: 2px; }
.footer-contact .icon { flex: none; margin-top: 4px; color: var(--brand); }
@media (hover: hover) { .footer-col a:hover { color: var(--fg); } }

.footer-bottom {
  display: flex; flex-wrap: wrap; align-items: center; gap: 10px 28px;
  padding-block: 28px calc(28px + env(safe-area-inset-bottom));
  border-top: 1px solid var(--line);
  margin-top: clamp(24px, 3vw, 40px);
  font-size: .8rem; color: var(--faint); letter-spacing: .04em;
}
.footer-bottom a:hover { color: var(--fg); }
.to-top { margin-left: auto; display: inline-flex; align-items: center; gap: 8px; min-height: 40px; color: var(--muted); }
.to-top:hover { color: var(--fg); }

/* ── 回到頂部浮動鈕：捲過一屏才出現，外圈＝閱讀進度；LINE 鈕在時疊在它上方 ── */
.scroll-top {
  --p: 0;
  position: fixed; right: 16px; bottom: calc(16px + env(safe-area-inset-bottom)); z-index: 54;
  display: grid; place-items: center; width: 52px; height: 52px; border-radius: 50%;
  background: var(--paper); color: var(--ink);
  box-shadow: 0 0 0 1px rgba(11, 24, 48, .12), 0 12px 32px rgba(4, 10, 22, .28);
  opacity: 0; visibility: hidden; transform: translateY(12px);
  transition: transform var(--m-base) var(--m-ease-in), opacity var(--m-fast) var(--m-ease), visibility 0s var(--m-base);
}
.scroll-top.is-on { opacity: 1; visibility: visible; transform: none; transition: transform var(--m-slow) var(--ease-wind), opacity var(--m-base) var(--m-ease), visibility 0s; }
.scroll-top.is-on.is-raised { transform: translateY(-64px); }
.scroll-top__ring { position: absolute; inset: 0; width: 100%; height: 100%; transform: rotate(-90deg); pointer-events: none; }
.scroll-top__ring circle { fill: none; stroke: var(--brand); stroke-width: 2.5; stroke-linecap: round; stroke-dasharray: 1; stroke-dashoffset: calc(1 - var(--p)); }
.scroll-top .icon { position: relative; transition: transform var(--m-base) var(--m-ease-out); }
@media (hover: hover) { .scroll-top:hover .icon { transform: translateY(-3px); } }
.scroll-top:focus-visible { outline-offset: 4px; }
@media print { .scroll-top { display: none; } }

/* ── LINE 浮動按鈕：小圓鈕，主視覺與收尾區自動收起 ───── */
.line-float {
  position: fixed; right: 16px; bottom: calc(16px + env(safe-area-inset-bottom)); z-index: 55;
  display: block; width: 52px; height: 52px; border-radius: 50%;
  box-shadow: 0 12px 32px rgba(4, 10, 22, .35);
  transition: transform var(--m-base) var(--ease-wind), opacity var(--m-base) var(--m-ease), visibility 0s;
}
/* LINE 官方圓形圖示（line.me/en/logo，Android 版 PNG），依品牌規範原樣使用、不改色不加框 */
.line-float img { display: block; width: 100%; height: 100%; }
.line-float span { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
.line-float.is-tucked { transform: translateY(140%); opacity: 0; visibility: hidden; transition: transform var(--m-base) var(--m-ease-in), opacity var(--m-fast) var(--m-ease), visibility 0s var(--m-base); }
@media (hover: hover) { .line-float:hover { transform: translateY(-3px); } }

/* ── 浮動預覽（清單 hover 時跟著游標） ──────────────────── */
.preview { display: none; }
@media (hover: hover) and (pointer: fine) {
  .preview {
    display: block; position: fixed; left: 0; top: 0; z-index: 50; pointer-events: none;
    width: 300px; height: 200px; margin: 26px 0 0 30px; /* 游標右下方，不遮正在看的那一行 */
  }
  .preview__inner {
    width: 100%; height: 100%; border-radius: 16px; overflow: hidden;
    background: #ffffff;
    transform: scale(.4) rotate(-6deg); opacity: 0;
    transition: transform var(--m-slow) var(--ease-wind), opacity var(--m-base) var(--m-ease);
    box-shadow: 0 30px 80px rgba(0, 0, 0, .35);
  }
  .preview.is-on .preview__inner { transform: none; opacity: 1; }
  .preview img { width: 100%; height: 100%; object-fit: cover; }
  .preview.is-contain img { object-fit: contain; padding: 28px 36px; }
}

/* 收尾區按鈕實心，風線不會穿過；手機把「起」字的空間留在標題上方 */
.footer-cta .btn--ghost { background: var(--ink-2); }
@media (max-width: 767px) { .footer-cta { padding-top: 52vw; } }

/* 收尾區：按鈕放在說明文字下方（右側留給「起」字） */
.footer-cta__row { grid-template-columns: 1fr !important; max-width: 680px; }