@charset "UTF-8";
/* ==========================================================================
   稻穎．境意空間製所 door in · space design
   設計系統 — 編輯式排版、留白、細線、安靜
   色票、字體、調性依《品牌資料 v2》第九節「識別規範」
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Tokens
   -------------------------------------------------------------------------- */
:root {
  /* 品牌色（取樣自 logo） */
  --paper:      #FBF8F2;   /* 頁面底色．米白 */
  --ink:        #060504;   /* 標題．近黑（logo 字色） */
  --body:       #333333;   /* 內文．深灰 */
  --taupe:      #C4BCAE;   /* 品牌主色．灰褐 — 僅作背景與裝飾，不作文字色 */
  --dark:       #1F1D1B;   /* 深色區塊．「拆前」與 footer */
  --walnut:     #5A4736;   /* 輔助棕．次要強調 */

  /* 衍生階調 */
  --paper-warm: #F4EFE6;   /* 次級底色 */
  --taupe-wash: #EDE8DF;   /* 極淡品牌底 */
  --rule:       rgba(6, 5, 4, .13);
  --rule-soft:  rgba(6, 5, 4, .07);
  --rule-dark:  rgba(251, 248, 242, .16);
  --body-dim:   #6E6862;
  --on-dark:    #E8E2D8;
  --on-dark-dim:#9A938A;

  /* 字體 */
  --serif: "Noto Serif TC", "Songti TC", "PMingLiU", serif;
  --sans:  "Noto Sans TC", -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang TC", "Microsoft JhengHei", sans-serif;
  --didone: "Playfair Display", "Didot", "Bodoni 72", Georgia, serif;

  /* 尺度 — 字級刻意偏小，留白偏多 */
  --fs-micro: .6875rem;   /* 11px  標籤 */
  --fs-small: .8125rem;   /* 13px  註記 */
  --fs-body:  .9375rem;   /* 15px  內文 */
  --fs-lead:  1.0625rem;  /* 17px  導言 */
  --fs-h3:    1.0625rem;
  --fs-h2:    clamp(1.3125rem, 1.05rem + .95vw, 1.75rem);
  --fs-h1:    clamp(1.625rem, 1.1rem + 2.1vw, 2.375rem);
  --fs-display: clamp(1.875rem, 1.1rem + 3.1vw, 3rem);

  /* 節奏 */
  --gutter: clamp(1.5rem, 5vw, 6rem);
  --measure: 34em;
  --section-y: clamp(5rem, 11vh, 10rem);
  --maxw: 1320px;

  /* 動態 — 克制 */
  --ease: cubic-bezier(.22, .61, .36, 1);
  --dur: .55s;
}

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 6rem;
}

body {
  background: var(--paper);
  color: var(--body);
  font-family: var(--sans);
  font-size: var(--fs-body);
  font-weight: 400;
  line-height: 2;
  letter-spacing: .045em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

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

a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
ul, ol { list-style: none; padding: 0; }

::selection { background: var(--taupe); color: var(--ink); }

:focus-visible {
  outline: 1px solid var(--walnut);
  outline-offset: 3px;
}

.visually-hidden {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

.skip-link {
  position: absolute; top: 0; left: 0; z-index: 200;
  transform: translateY(-110%);
  background: var(--ink); color: var(--paper);
  padding: .75rem 1.25rem; font-size: var(--fs-small);
}
.skip-link:focus { transform: translateY(0); }

/* --------------------------------------------------------------------------
   3. Typography
   -------------------------------------------------------------------------- */
h1, h2, h3, h4 {
  font-family: var(--serif);
  color: var(--ink);
  font-weight: 500;
  line-height: 1.72;
  letter-spacing: .07em;
  text-wrap: balance;
}

h1 { font-size: var(--fs-h1); }
h2 { font-size: var(--fs-h2); }
h3 { font-size: var(--fs-h3); line-height: 1.9; }

p { text-wrap: pretty; }
p + p { margin-top: 1.35em; }

strong, b { font-weight: 500; color: var(--ink); }

/* 導言 */
.lead {
  font-family: var(--serif);
  font-size: var(--fs-lead);
  line-height: 2.15;
  color: var(--ink);
  letter-spacing: .06em;
}

/* 大字陳述 — 仍然克制，不做滿版大字 */
.statement {
  font-family: var(--serif);
  font-size: var(--fs-display);
  line-height: 1.8;
  letter-spacing: .08em;
  color: var(--ink);
  font-weight: 400;
}

/* 英文品牌識別．Didone、字距拉開，比照 logo */
.latin {
  font-family: var(--didone);
  letter-spacing: .34em;
  text-transform: lowercase;
  font-weight: 400;
}

/* 眉標：序號 + 短線 + 標籤 */
.eyebrow {
  display: flex;
  align-items: center;
  gap: .875rem;
  font-family: var(--didone);
  font-size: var(--fs-micro);
  letter-spacing: .3em;
  text-transform: uppercase;
  color: var(--walnut);
  margin-bottom: 2rem;
}
.eyebrow::after {
  content: "";
  flex: 1 1 auto;
  height: 1px;
  background: var(--rule);
  max-width: 5rem;
}
.eyebrow--dark { color: var(--taupe); }
.eyebrow--dark::after { background: var(--rule-dark); }

.num {
  font-family: var(--didone);
  font-size: var(--fs-micro);
  letter-spacing: .18em;
  color: var(--taupe);
}

/* 註記 */
.note {
  font-size: var(--fs-small);
  color: var(--body-dim);
  line-height: 2.05;
}

/* --------------------------------------------------------------------------
   4. Layout
   -------------------------------------------------------------------------- */
.shell {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section { padding-block: var(--section-y); position: relative; }
.section--tight { padding-block: clamp(3.5rem, 7vh, 6rem); }

.section--dark {
  background: var(--dark);
  color: var(--on-dark-dim);
}
.section--dark h1, .section--dark h2, .section--dark h3 { color: var(--on-dark); }
.section--dark strong { color: var(--on-dark); }
.section--dark .lead { color: var(--on-dark); }
.section--dark .statement { color: var(--on-dark); }
.section--dark .note { color: var(--on-dark-dim); }

.section--wash { background: var(--taupe-wash); }
.section--warm { background: var(--paper-warm); }

/* 編輯式非對稱網格 */
.grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  column-gap: clamp(1.25rem, 2.5vw, 2.5rem);
}

/* 常用跨距 */
.col-full  { grid-column: 1 / -1; }
.col-left  { grid-column: 1 / span 5; }
.col-right { grid-column: 7 / span 6; }
.col-body  { grid-column: 4 / span 7; }
.col-narrow{ grid-column: 4 / span 6; }
.col-wide  { grid-column: 2 / span 10; }

.measure { max-width: var(--measure); }

/* 細線 */
.rule {
  height: 1px;
  background: var(--rule);
  border: 0;
  margin: 0;
}
.rule--soft { background: var(--rule-soft); }
.rule--dark { background: var(--rule-dark); }

/* 門的意象：一道窄的光縫。用得極少，只在深色區塊 */
.aperture {
  position: absolute;
  top: 0; bottom: 0;
  width: 1px;
  background: linear-gradient(180deg,
    transparent 0%,
    rgba(196, 188, 174, .38) 22%,
    rgba(196, 188, 174, .38) 78%,
    transparent 100%);
  pointer-events: none;
}

/* --------------------------------------------------------------------------
   5. Header
   -------------------------------------------------------------------------- */
.header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease);
  border-bottom: 1px solid transparent;
}
.header__inner {
  max-width: var(--maxw);
  margin-inline: auto;
  padding: clamp(1rem, 2.2vh, 1.75rem) var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}
.header.is-stuck {
  background: rgba(251, 248, 242, .92);
  backdrop-filter: saturate(1.4) blur(14px);
  -webkit-backdrop-filter: saturate(1.4) blur(14px);
  border-bottom-color: var(--rule-soft);
}

/* 標誌組合 — SVG 標記 + 文字，字距比照 logo */
.brand {
  display: flex;
  align-items: center;
  gap: .875rem;
  color: var(--ink);
}
.brand__mark {
  width: auto;
  height: 2.125rem;
  color: var(--taupe);
  flex: none;
  transition: color var(--dur) var(--ease);
}
.brand:hover .brand__mark { color: var(--walnut); }
.brand__text { display: flex; flex-direction: column; gap: .3em; }
.brand__tc {
  font-family: var(--serif);
  font-size: .8125rem;
  font-weight: 500;
  letter-spacing: .16em;
  line-height: 1;
  color: var(--ink);
}
.brand__en {
  font-family: var(--didone);
  font-size: .5625rem;
  letter-spacing: .26em;
  line-height: 1;
  color: var(--body-dim);
  text-transform: lowercase;
}

/* 主選單 */
.nav { display: flex; align-items: center; gap: clamp(1.25rem, 2.4vw, 2.5rem); }
.nav__link {
  font-size: var(--fs-small);
  letter-spacing: .14em;
  color: var(--body);
  position: relative;
  padding-block: .35rem;
  transition: color var(--dur) var(--ease);
}
.nav__link::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 1px;
  background: var(--walnut);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--dur) var(--ease);
}
.nav__link:hover { color: var(--ink); }
.nav__link:hover::after,
.nav__link[aria-current="page"]::after { transform: scaleX(1); }
.nav__link[aria-current="page"] { color: var(--ink); }

/* 選單觸發鈕（手機） */
.nav-toggle {
  display: none;
  width: 2.5rem; height: 2.5rem;
  margin-right: -.5rem;
  position: relative;
  z-index: 120;
}
.nav-toggle span {
  position: absolute;
  left: .5rem; right: .5rem;
  height: 1px;
  background: var(--ink);
  transition: transform var(--dur) var(--ease), opacity .2s linear;
}
.nav-toggle span:nth-child(1) { top: .9375rem; }
.nav-toggle span:nth-child(2) { bottom: .9375rem; }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(.3125rem) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { transform: translateY(-.3125rem) rotate(-45deg); }

/* --------------------------------------------------------------------------
   6. 按鈕與連結
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: .875rem;
  font-size: var(--fs-small);
  letter-spacing: .16em;
  color: var(--ink);
  padding: 1.0625rem 1.75rem;
  border: 1px solid var(--rule);
  background: transparent;
  position: relative;
  overflow: hidden;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.btn::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--taupe);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--dur) var(--ease);
  z-index: -1;
}
.btn > * { position: relative; }
.btn:hover { border-color: var(--taupe); }
.btn:hover::before { transform: scaleX(1); }

.btn--solid {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}
.btn--solid::before { background: var(--walnut); }
.btn--solid:hover { color: var(--paper); border-color: var(--walnut); }

.btn--ghost-dark { color: var(--on-dark); border-color: var(--rule-dark); }
.btn--ghost-dark::before { background: var(--taupe); }
.btn--ghost-dark:hover { color: var(--ink); border-color: var(--taupe); }

/* 箭頭 */
.btn__arrow {
  width: 1.5rem; height: 1px;
  background: currentColor;
  flex: none;
  transition: width var(--dur) var(--ease);
}
.btn:hover .btn__arrow { width: 2.25rem; }

/* 文字型連結 */
.link {
  display: inline-flex;
  align-items: center;
  gap: .75rem;
  font-size: var(--fs-small);
  letter-spacing: .14em;
  color: var(--ink);
  padding-bottom: .375rem;
  border-bottom: 1px solid var(--rule);
  transition: border-color var(--dur) var(--ease), gap var(--dur) var(--ease);
}
.link:hover { border-bottom-color: var(--walnut); gap: 1.125rem; }
.link--dark { color: var(--on-dark); border-bottom-color: var(--rule-dark); }
.link--dark:hover { border-bottom-color: var(--taupe); }

/* --------------------------------------------------------------------------
   7. Hero — 左字右圖，呼應既有社群版型
   -------------------------------------------------------------------------- */
.hero {
  min-height: 100svh;
  display: grid;
  grid-template-columns: minmax(0, 47fr) minmax(0, 53fr);
  align-items: stretch;
}

.hero__copy {
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 9rem var(--gutter) clamp(3.5rem, 8vh, 6rem) var(--gutter);
  max-width: 44rem;
  margin-left: auto;
  width: 100%;
}

.hero__title {
  font-size: var(--fs-display);
  font-weight: 400;
  line-height: 1.85;
  letter-spacing: .09em;
  color: var(--ink);
}

.hero__sub {
  margin-top: 2rem;
  font-size: var(--fs-small);
  letter-spacing: .16em;
  color: var(--body-dim);
}

.hero__cta { margin-top: clamp(2.5rem, 5vh, 4rem); }

.hero__meta {
  margin-top: clamp(2.5rem, 5vh, 3.5rem);
  padding-top: 1.75rem;
  border-top: 1px solid var(--rule-soft);
  display: flex;
  flex-wrap: wrap;
  gap: .5rem 1.75rem;
  font-size: var(--fs-micro);
  letter-spacing: .2em;
  color: var(--body-dim);
}
.hero__meta li { display: flex; align-items: center; gap: 1.75rem; }
.hero__meta li + li::before {
  content: "";
  width: 1px; height: .75rem;
  background: var(--rule);
  margin-left: -.875rem;
}

.hero__figure {
  position: relative;
  overflow: hidden;
  background: var(--taupe-wash);
  min-height: 60svh;
}
.hero__figure img,
.hero__figure .ph {
  position: absolute;
  inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
}

/* 圖說 */
.figcap {
  position: absolute;
  left: clamp(1rem, 2vw, 2rem);
  bottom: clamp(1rem, 2vw, 2rem);
  font-size: var(--fs-micro);
  letter-spacing: .2em;
  color: var(--paper);
  text-shadow: 0 1px 8px rgba(0, 0, 0, .55);
  z-index: 2;
}

/* --------------------------------------------------------------------------
   8. 頁首區（內頁）
   -------------------------------------------------------------------------- */
.pagehead {
  padding-top: clamp(9rem, 20vh, 14rem);
  padding-bottom: clamp(3rem, 8vh, 6rem);
}
.pagehead__title { margin-bottom: 1.75rem; }
.pagehead__lead { max-width: var(--measure); }

/* 麵包屑 */
.crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .625rem;
  font-size: var(--fs-micro);
  letter-spacing: .18em;
  color: var(--body-dim);
  margin-bottom: 2rem;
}
.crumbs li { display: flex; align-items: center; gap: .625rem; }
.crumbs li + li::before { content: "／"; color: var(--taupe); }
.crumbs a:hover { color: var(--ink); }

/* --------------------------------------------------------------------------
   9. 三支柱
   -------------------------------------------------------------------------- */
.pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--rule-soft);
  border-block: 1px solid var(--rule-soft);
}
.pillar {
  background: var(--paper);
  padding: clamp(2rem, 4vw, 3.5rem) clamp(1.5rem, 2.5vw, 2.5rem);
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}
.section--wash .pillar { background: var(--taupe-wash); }
.pillar__num {
  font-family: var(--didone);
  font-size: var(--fs-micro);
  letter-spacing: .22em;
  color: var(--taupe);
}
.pillar__title { font-size: var(--fs-lead); letter-spacing: .09em; }
.pillar__figure {
  aspect-ratio: 4 / 3;
  background: var(--paper-warm);
  overflow: hidden;
  margin-bottom: .5rem;
}
.pillar__figure img { width: 100%; height: 100%; object-fit: cover; }

/* --------------------------------------------------------------------------
   10. 流程
   -------------------------------------------------------------------------- */
.steps { border-top: 1px solid var(--rule); }
.step {
  display: grid;
  grid-template-columns: 5rem minmax(0, 15rem) minmax(0, 1fr);
  gap: clamp(1rem, 3vw, 3rem);
  padding-block: clamp(1.75rem, 3.5vh, 2.75rem);
  border-bottom: 1px solid var(--rule);
  align-items: baseline;
}
.step__num {
  font-family: var(--didone);
  font-size: .875rem;
  letter-spacing: .12em;
  color: var(--taupe);
}
.step__title {
  font-family: var(--serif);
  font-size: var(--fs-h3);
  color: var(--ink);
  letter-spacing: .1em;
}
.step__desc { color: var(--body); max-width: 32em; }
.section--dark .step { border-color: var(--rule-dark); }
.section--dark .steps { border-color: var(--rule-dark); }
.section--dark .step__desc { color: var(--on-dark-dim); }

/* --------------------------------------------------------------------------
   11. 拆前／完工 同機位對比滑桿
   -------------------------------------------------------------------------- */
.ba {
  position: relative;
  overflow: hidden;
  background: var(--dark);
  aspect-ratio: 3 / 2;
  touch-action: pan-y;
  cursor: ew-resize;
  user-select: none;
  -webkit-user-select: none;
}
.ba__layer {
  position: absolute;
  inset: 0;
  width: 100%; height: 100%;
}
.ba__layer img,
.ba__layer .ph {
  width: 100%; height: 100%;
  object-fit: cover;
  pointer-events: none;
}
/* 上層（拆前）依滑桿位置裁切 */
.ba__layer--before {
  clip-path: inset(0 calc(100% - var(--pos, 50%)) 0 0);
}
.ba__handle {
  position: absolute;
  top: 0; bottom: 0;
  left: var(--pos, 50%);
  width: 1px;
  background: var(--paper);
  transform: translateX(-.5px);
  z-index: 3;
  pointer-events: none;
}
.ba__grip {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 3rem; height: 3rem;
  border: 1px solid var(--paper);
  border-radius: 50%;
  background: rgba(31, 29, 27, .35);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  display: grid;
  place-items: center;
  gap: 0;
}
.ba__grip::before,
.ba__grip::after {
  content: "";
  position: absolute;
  width: .375rem; height: .375rem;
  border-top: 1px solid var(--paper);
  border-right: 1px solid var(--paper);
}
.ba__grip::before { transform: rotate(-135deg) translate(-.28rem, -.28rem); }
.ba__grip::after  { transform: rotate(45deg) translate(-.28rem, -.28rem); }

.ba__tag {
  position: absolute;
  top: clamp(.75rem, 2vw, 1.5rem);
  font-size: var(--fs-micro);
  letter-spacing: .26em;
  color: var(--paper);
  padding: .4375rem .875rem;
  background: rgba(31, 29, 27, .5);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  z-index: 4;
}
.ba__tag--before { left: clamp(.75rem, 2vw, 1.5rem); }
.ba__tag--after  { right: clamp(.75rem, 2vw, 1.5rem); }

.ba__range {
  position: absolute;
  inset: 0;
  opacity: 0;
  width: 100%; height: 100%;
  cursor: ew-resize;
  z-index: 5;
  margin: 0;
}
.ba__range:focus-visible + .ba__handle {
  box-shadow: 0 0 0 2px var(--walnut);
}

.ba-hint {
  margin-top: 1rem;
  font-size: var(--fs-micro);
  letter-spacing: .2em;
  color: var(--body-dim);
  display: flex;
  align-items: center;
  gap: .75rem;
}
.ba-hint::before {
  content: "";
  width: 2rem; height: 1px;
  background: var(--taupe);
}

/* --------------------------------------------------------------------------
   12. 實績列表
   -------------------------------------------------------------------------- */
.works {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 22rem), 1fr));
  gap: clamp(2rem, 4vw, 3.5rem) clamp(1.25rem, 2.5vw, 2.5rem);
}
.work { display: flex; flex-direction: column; }
.work__figure {
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: var(--paper-warm);
  margin-bottom: 1.5rem;
}
.work__figure img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 1.1s var(--ease);
}
.work:hover .work__figure img { transform: scale(1.03); }
.work__meta {
  display: flex;
  gap: 1rem;
  font-size: var(--fs-micro);
  letter-spacing: .2em;
  color: var(--body-dim);
  margin-bottom: .875rem;
}
.work__title {
  font-size: var(--fs-h3);
  letter-spacing: .09em;
  margin-bottom: .625rem;
}
.work__excerpt { font-size: var(--fs-small); color: var(--body-dim); }

/* 實績頁：全幅滑桿下方的圖說列 */
.case-cap  { grid-column: 2 / span 4; }
.case-desc { grid-column: 7 / span 5; align-self: end; }
.case-cap .work__title { margin-bottom: 0; }
@media (max-width: 860px) {
  .case-cap, .case-desc { grid-column: 1 / -1; }
  .case-desc { margin-top: .25rem; }
  .case-g { grid-column: 1 / -1 !important; }
}

/* --------------------------------------------------------------------------
   13. 工法特寫
   -------------------------------------------------------------------------- */
.craft {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 15rem), 1fr));
  gap: clamp(1.25rem, 2.5vw, 2rem);
}
.craft__item { display: flex; flex-direction: column; gap: 1.125rem; }
.craft__figure {
  aspect-ratio: 3 / 4;
  overflow: hidden;
  background: var(--dark);
}
.craft__figure img { width: 100%; height: 100%; object-fit: cover; }
.craft__label {
  font-size: var(--fs-small);
  letter-spacing: .12em;
  color: var(--on-dark);
}
.craft__note { font-size: var(--fs-micro); letter-spacing: .14em; color: var(--on-dark-dim); }

/* --------------------------------------------------------------------------
   14. FAQ
   -------------------------------------------------------------------------- */
.faq { border-top: 1px solid var(--rule); }
.faq__item { border-bottom: 1px solid var(--rule); }
.faq__q {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 2rem;
  width: 100%;
  text-align: left;
  padding-block: clamp(1.375rem, 3vh, 2rem);
  font-family: var(--serif);
  font-size: var(--fs-h3);
  color: var(--ink);
  letter-spacing: .08em;
  line-height: 1.85;
  transition: color var(--dur) var(--ease);
}
.faq__q:hover { color: var(--walnut); }
.faq__icon {
  position: relative;
  flex: none;
  width: .875rem; height: .875rem;
  margin-top: .75em;
}
.faq__icon::before,
.faq__icon::after {
  content: "";
  position: absolute;
  inset: 50% 0 auto 0;
  height: 1px;
  background: var(--taupe);
  transition: transform var(--dur) var(--ease);
}
.faq__icon::after { transform: rotate(90deg); }
.faq__q[aria-expanded="true"] .faq__icon::after { transform: rotate(0deg); }

.faq__a {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows var(--dur) var(--ease);
}
.faq__a > div { overflow: hidden; }
.faq__item.is-open .faq__a { grid-template-rows: 1fr; }
.faq__a p {
  max-width: var(--measure);
  padding-bottom: clamp(1.375rem, 3vh, 2rem);
  color: var(--body);
}

/* --------------------------------------------------------------------------
   15. 聯絡
   -------------------------------------------------------------------------- */
.contact-list { display: grid; gap: 1px; background: var(--rule-soft); border-block: 1px solid var(--rule-soft); }
.contact-row {
  background: var(--paper);
  display: grid;
  grid-template-columns: minmax(0, 10rem) minmax(0, 1fr);
  gap: 1.5rem;
  padding-block: 1.5rem;
  align-items: baseline;
}
.contact-row dt {
  font-size: var(--fs-micro);
  letter-spacing: .22em;
  color: var(--body-dim);
}
.contact-row dd { margin: 0; color: var(--ink); }
.contact-row a { border-bottom: 1px solid var(--rule); padding-bottom: .1875rem; transition: border-color var(--dur) var(--ease); }
.contact-row a:hover { border-bottom-color: var(--walnut); }

/* --------------------------------------------------------------------------
   16. Footer
   -------------------------------------------------------------------------- */
.footer {
  background: var(--dark);
  color: var(--on-dark-dim);
  padding-block: clamp(3.5rem, 8vh, 6rem) 2.5rem;
  font-size: var(--fs-small);
}
.footer a:hover { color: var(--on-dark); }
.footer__top {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(2.5rem, 5vw, 4rem);
  padding-bottom: clamp(3rem, 6vh, 4.5rem);
}
.footer__brand .brand__mark { color: var(--taupe); height: 2.5rem; }
.footer__brand .brand__tc { color: var(--on-dark); }
.footer__brand .brand__en { color: var(--on-dark-dim); }
.footer__tagline {
  margin-top: 1.75rem;
  font-family: var(--serif);
  color: var(--on-dark);
  letter-spacing: .09em;
  line-height: 2.1;
  max-width: 22em;
}
.footer__heading {
  font-size: var(--fs-micro);
  letter-spacing: .24em;
  color: var(--taupe);
  margin-bottom: 1.5rem;
  font-family: var(--didone);
  text-transform: uppercase;
}
.footer__list { display: grid; gap: .875rem; }
.footer__bottom {
  border-top: 1px solid var(--rule-dark);
  padding-top: 2rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem 2rem;
  font-size: var(--fs-micro);
  letter-spacing: .14em;
}
.footer__legal { display: flex; flex-wrap: wrap; gap: .5rem 1.5rem; }

/* --------------------------------------------------------------------------
   17. 佔位圖 — 真實照片就位前使用，替換後即可刪除
   -------------------------------------------------------------------------- */
.ph {
  display: grid;
  place-content: center;
  gap: .625rem;
  text-align: center;
  background:
    repeating-linear-gradient(45deg,
      transparent 0 11px,
      rgba(6, 5, 4, .028) 11px 22px),
    var(--paper-warm);
  color: var(--body-dim);
  padding: 1.5rem;
  min-height: 100%;
}
.ph__label {
  font-size: var(--fs-micro);
  letter-spacing: .22em;
  color: var(--walnut);
}
.ph__spec { font-size: var(--fs-micro); letter-spacing: .1em; line-height: 1.9; }
.ph--dark {
  background:
    repeating-linear-gradient(45deg,
      transparent 0 11px,
      rgba(251, 248, 242, .04) 11px 22px),
    var(--dark);
  color: var(--on-dark-dim);
}
.ph--dark .ph__label { color: var(--taupe); }

/* --------------------------------------------------------------------------
   17b. 浮動 LINE 諮詢
   動線規則：
   ① Hero 不出現（首屏已有主 CTA，避免互搶）——捲過 70% 視窗高才進場
   ② 捲到 1.6 個視窗高（看完痛點段，動機最高點）彈一次情境提示，每次瀏覽只彈一次
   ③ 頁尾與結尾 CTA 進入視野時自動讓位（版面內 CTA 接手，不疊加）
   ④ 聯絡頁不放（頁面本身就是目的地）
   -------------------------------------------------------------------------- */
.fab-wrap {
  position: fixed;
  right: clamp(1rem, 3vw, 2rem);
  bottom: calc(clamp(1rem, 3vh, 1.75rem) + env(safe-area-inset-bottom, 0px));
  z-index: 90;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: .875rem;
  pointer-events: none;
}
.fab {
  display: flex;
  align-items: center;
  gap: .75rem;
  background: var(--ink);
  color: var(--paper);
  padding: .5625rem 1.375rem .5625rem .5625rem;
  border-radius: 999px;
  box-shadow: 0 12px 34px rgba(6, 5, 4, .22);
  opacity: 0;
  transform: translateY(14px);
  pointer-events: none;
  transition: opacity .5s var(--ease), transform .5s var(--ease), background .35s var(--ease);
}
.fab.is-on { opacity: 1; transform: none; pointer-events: auto; }
.fab-wrap.is-away .fab { opacity: 0; transform: translateY(14px); pointer-events: none; }
.fab:hover { background: var(--walnut); }
.fab__icon {
  width: 2.375rem; height: 2.375rem;
  border-radius: 50%;
  background: #06C755;             /* LINE 綠只用在圖標——可辨識，但不吵 */
  display: grid; place-items: center;
  flex: none;
}
.fab__icon svg { width: 1.3125rem; height: 1.3125rem; fill: #fff; display: block; }
.fab__label { font-size: var(--fs-small); letter-spacing: .12em; white-space: nowrap; }

/* 情境提示泡泡 */
.fab__nudge {
  position: relative;
  max-width: min(17.5rem, calc(100vw - 4rem));
  background: var(--paper);
  color: var(--body);
  border: 1px solid var(--rule);
  box-shadow: 0 14px 40px rgba(6, 5, 4, .14);
  padding: 1rem 2.25rem 1rem 1.125rem;
  font-size: var(--fs-small);
  line-height: 1.95;
  letter-spacing: .06em;
  opacity: 0;
  transform: translateY(8px);
  pointer-events: none;
  transition: opacity .5s var(--ease), transform .5s var(--ease);
}
.fab__nudge.is-on { opacity: 1; transform: none; pointer-events: auto; }
.fab__nudge strong { color: var(--ink); font-weight: 500; }
.fab__close {
  position: absolute;
  top: .375rem; right: .5rem;
  font-size: 1rem;
  line-height: 1;
  color: var(--body-dim);
  padding: .25rem;
}
.fab__close:hover { color: var(--ink); }

@media (max-width: 560px) {
  .fab__label { font-size: var(--fs-micro); letter-spacing: .1em; }
}
@media print { .fab-wrap { display: none; } }

/* --------------------------------------------------------------------------
   18. 進場 — 極克制，僅淡入
   -------------------------------------------------------------------------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(8px);
  transition: opacity .75s var(--ease), transform .75s var(--ease);
}
[data-reveal].is-in { opacity: 1; transform: none; }

/* --------------------------------------------------------------------------
   19. 響應式
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
  .col-left  { grid-column: 1 / span 6; }
  .col-right { grid-column: 7 / span 6; }
  .col-body,
  .col-narrow { grid-column: 2 / span 10; }
  .footer__top { grid-template-columns: 1fr 1fr; }
  .footer__brand { grid-column: 1 / -1; }
}

@media (max-width: 860px) {
  :root { --section-y: clamp(4rem, 8vh, 6rem); }

  .nav-toggle { display: block; }

  .nav {
    position: fixed;
    inset: 0;
    flex-direction: column;
    justify-content: center;
    align-items: flex-start;
    gap: 1.75rem;
    background: var(--paper);
    padding: 6rem var(--gutter) 3rem;
    transform: translateY(-100%);
    transition: transform .5s var(--ease);
    z-index: 110;
    overflow-y: auto;
  }
  .nav.is-open { transform: none; }
  .nav__link { font-family: var(--serif); font-size: 1.25rem; letter-spacing: .14em; }
  .nav .btn { margin-top: 1rem; }

  .hero { grid-template-columns: 1fr; min-height: 0; }
  .hero__copy { padding-top: 7.5rem; max-width: none; order: 2; }
  .hero__figure { order: 1; aspect-ratio: 4 / 5; min-height: 0; }

  .pillars { grid-template-columns: 1fr; }

  .step { grid-template-columns: 3rem 1fr; row-gap: .5rem; }
  .step__num { grid-row: span 2; }

  .contact-row { grid-template-columns: 1fr; gap: .5rem; }

  .col-left, .col-right, .col-body, .col-narrow, .col-wide { grid-column: 1 / -1; }
  .col-right { margin-top: 2.5rem; }
}

@media (max-width: 560px) {
  .footer__top { grid-template-columns: 1fr; }
  .ba { aspect-ratio: 4 / 5; }
  .hero__meta li + li::before { display: none; }
  .hero__meta li { gap: 0; }
}

/* --------------------------------------------------------------------------
   20. 偏好與列印
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
  [data-reveal] { opacity: 1; transform: none; }
  .work:hover .work__figure img { transform: none; }
}

@media print {
  .header, .footer, .nav-toggle, .ba__range { display: none; }
  body { background: #fff; color: #000; }
  .section { padding-block: 1.5rem; }
  a::after { content: " (" attr(href) ")"; font-size: .75em; color: #666; }
}