/* flow-ai 官網 demo 共用樣式
   所有 class 以 fai- 開頭，避免和網站平台內建的 Bootstrap 5、Font Awesome（fa-*）衝突。
   上架方式見 README.md。 */

/* ── 色彩與字體 token（取自 FlowAI_CIS v1） ─────────────────── */
:root {
  --paper: #F4F7F8;   /* 霧白 Mist */
  --sheet: #FFFFFF;
  --ink: #0F2438;     /* 深墨藍 Ink */
  --muted: #5A6B78;   /* 石板灰 Slate */
  --line: #D8E1E6;
  --soft: #EAF0F2;
  --flow: #0E9AA7;    /* 流光青 Flow */
  --flow-text: #0B7F8A; /* 青色小字用（對比足夠） */
  --copper: #B8672F;  /* 接點銅：一個版面最多一處 */
  --dark: #0F2438;    /* 深色區塊底 */
  --dark-fg: #FFFFFF;
  --dark-muted: #A9BAC6;
  --t-context: #0E9AA7;
  --t-core: #3D6E9E;
  --t-crew: #B8672F;
  --shadow: 0 1px 2px rgba(15,36,56,.06), 0 6px 20px rgba(15,36,56,.06);
  --radius: 14px;
  --f-display: "Red Hat Display", "Noto Sans TC", system-ui, sans-serif;
  --f-body: "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", system-ui, sans-serif;
  --f-mono: "IBM Plex Mono", ui-monospace, Menlo, monospace;
  --container: 1160px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #0A1620; --sheet: #0F2030; --ink: #E6EEF2; --muted: #93A6B4;
    --line: #22394C; --soft: #15293B; --flow: #4FD1DB; --flow-text: #4FD1DB; --copper: #E0904F;
    --dark: #061019; --dark-fg: #E6EEF2; --dark-muted: #93A6B4;
    --t-context: #4FD1DB; --t-core: #7FA8D6; --t-crew: #E0904F;
    --shadow: 0 1px 2px rgba(0,0,0,.35);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --paper: #0A1620; --sheet: #0F2030; --ink: #E6EEF2; --muted: #93A6B4;
  --line: #22394C; --soft: #15293B; --flow: #4FD1DB; --flow-text: #4FD1DB; --copper: #E0904F;
  --dark: #061019; --dark-fg: #E6EEF2; --dark-muted: #93A6B4;
  --t-context: #4FD1DB; --t-core: #7FA8D6; --t-crew: #E0904F;
  --shadow: 0 1px 2px rgba(0,0,0,.35);
  color-scheme: dark;
}

/* ── 基礎 ─────────────────────────────────────────── */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
[id] { scroll-margin-top: 80px; } /* 錨點不被 sticky header 遮住 */
body {
  margin: 0; background: var(--paper); color: var(--ink);
  font: 16px/1.8 var(--f-body); -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img, svg { max-width: 100%; }
a { color: var(--flow-text); }
h1, h2, h3, h4 { font-family: var(--f-display); line-height: 1.35; margin: 0 0 .5em; letter-spacing: -.005em; }
h1 { font-size: clamp(30px, 5vw, 52px); font-weight: 700; }
h2 { font-size: clamp(24px, 3.4vw, 34px); font-weight: 700; }
h3 { font-size: 20px; font-weight: 700; }
p { margin: 0 0 1em; }
.fai-mono { font-family: var(--f-mono); }
.fai-muted { color: var(--muted); }
.fai-skip { position: absolute; left: -999px; }
.fai-skip:focus { left: 16px; top: 8px; z-index: 100; background: var(--sheet); padding: 8px 12px; }

/* ── 版面 ─────────────────────────────────────────── */
.fai-container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }
.fai-section { padding: 88px 0; }
.fai-section--tight { padding: 56px 0; }
.fai-section--alt { background: var(--sheet); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.fai-section--dark { background: var(--dark); color: var(--dark-fg); }
.fai-section--dark .fai-muted, .fai-section--dark .fai-lead { color: var(--dark-muted); }
.fai-section--dark .fai-eyebrow, .fai-section--dark .fai-link, .fai-section--dark a:not(.fai-btn) { color: #4FD1DB; }
.fai-section-head { max-width: 760px; margin-bottom: 48px; }
.fai-section-head--center { margin-left: auto; margin-right: auto; text-align: center; }
.fai-eyebrow { /* 英文小字 / 章節標籤 */
  display: inline-block; font: 600 12px/1.4 var(--f-display); letter-spacing: .14em;
  text-transform: uppercase; color: var(--flow-text); margin-bottom: 12px;
}
.fai-lead { font-size: 18px; color: var(--muted); }
.fai-grid { display: grid; gap: 24px; }
.fai-grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.fai-grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.fai-grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.fai-split { display: grid; grid-template-columns: 1.05fr .95fr; gap: 56px; align-items: center; }
@media (max-width: 960px) {
  .fai-grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .fai-grid--3 { grid-template-columns: 1fr; }
  .fai-split { grid-template-columns: 1fr; gap: 36px; }
}
@media (max-width: 640px) {
  .fai-container { padding: 0 16px; }
  .fai-section { padding: 60px 0; }
  .fai-grid--2, .fai-grid--4 { grid-template-columns: 1fr; }
}

/* ── 按鈕 ─────────────────────────────────────────── */
.fai-btn {
  display: inline-flex; align-items: center; gap: 8px; padding: 12px 22px; border-radius: 999px;
  font: 700 15px/1 var(--f-body); text-decoration: none; border: 1.5px solid transparent;
  transition: transform .15s, background .15s; cursor: pointer;
}
.fai-btn:hover { transform: translateY(-1px); }
.fai-btn--primary { background: #0E9AA7; color: #fff; }
.fai-btn--primary:hover { background: #0B8793; }
.fai-btn--ghost { border-color: var(--line); color: var(--ink); background: transparent; }
.fai-section--dark .fai-btn--ghost { border-color: rgba(255,255,255,.3); color: var(--dark-fg); }
.fai-btn-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.fai-link { font-weight: 700; color: var(--flow-text); text-decoration: none; }
.fai-link::after { content: " →"; }

/* ── 卡片 ─────────────────────────────────────────── */
.fai-card {
  background: var(--sheet); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 28px; box-shadow: var(--shadow);
}
.fai-card h3 { margin-bottom: 8px; }
.fai-card p:last-child { margin-bottom: 0; }
a.fai-card { display: block; color: inherit; text-decoration: none; transition: border-color .15s, transform .15s; }
a.fai-card:hover { border-color: var(--flow); transform: translateY(-2px); }
.fai-card--flat { box-shadow: none; }
.fai-card__icon { width: 44px; height: 44px; margin-bottom: 14px; }
.fai-section--dark .fai-card { background: rgba(255,255,255,.04); border-color: rgba(255,255,255,.12); box-shadow: none; }

/* ── 產品標籤：知識庫／ERP 模組／AI 助理 ──────────────── */
.fai-tag {
  display: inline-flex; align-items: center; gap: 6px; padding: 3px 10px; border-radius: 999px;
  font: 600 12px/1.6 var(--f-body); border: 1px solid currentColor; white-space: nowrap;
}
.fai-tag::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: currentColor; }
.fai-tag--context { color: var(--t-context); }
.fai-tag--core { color: var(--t-core); }
.fai-tag--crew { color: var(--t-crew); }
.fai-tags { display: flex; flex-wrap: wrap; gap: 8px; }

/* ── 產品名稱三層：主名稱 / 副標 / 英文小字 ──────────────── */
.fai-product-name { font: 700 26px/1.3 var(--f-body); margin: 0; }
.fai-product-verb { font-weight: 700; color: var(--flow-text); margin: 4px 0 2px; }
.fai-product-en { font: 500 12px/1.4 var(--f-mono); color: var(--muted); letter-spacing: .04em; }

/* ── 步驟 ─────────────────────────────────────────── */
.fai-steps { counter-reset: step; display: grid; gap: 20px; grid-template-columns: repeat(4, minmax(0,1fr)); list-style: none; padding: 0; margin: 0; }
.fai-steps > li { counter-increment: step; position: relative; padding-top: 52px; }
.fai-steps > li::before {
  content: counter(step, decimal-leading-zero); position: absolute; top: 0; left: 0;
  font: 600 14px/1 var(--f-mono); color: var(--flow-text); padding: 10px 0;
  border-top: 2px solid var(--flow); width: 100%;
}
.fai-steps h3 { font-size: 18px; }
@media (max-width: 960px) { .fai-steps { grid-template-columns: repeat(2, minmax(0,1fr)); } }
@media (max-width: 640px) { .fai-steps { grid-template-columns: 1fr; } }

/* ── 清單、表格、FAQ ───────────────────────────────── */
.fai-checks { list-style: none; padding: 0; margin: 0; }
.fai-checks li { position: relative; padding-left: 26px; margin-bottom: 10px; }
.fai-checks li::before { content: ""; position: absolute; left: 4px; top: .7em; width: 8px; height: 8px; border-radius: 50%; background: var(--flow); }
.fai-table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); background: var(--sheet); }
.fai-table { width: 100%; border-collapse: collapse; font-size: 15px; min-width: 560px; }
.fai-table th, .fai-table td { text-align: left; padding: 14px 18px; border-bottom: 1px solid var(--line); vertical-align: top; }
.fai-table th { font-weight: 700; background: var(--soft); }
.fai-table tr:last-child td { border-bottom: 0; }
.fai-faq details { border-bottom: 1px solid var(--line); padding: 18px 0; }
.fai-faq summary { font-weight: 700; cursor: pointer; list-style: none; display: flex; justify-content: space-between; gap: 16px; }
.fai-faq summary::after { content: "+"; font-family: var(--f-mono); color: var(--flow-text); }
.fai-faq details[open] summary::after { content: "−"; }
.fai-faq details p { margin: 12px 0 0; color: var(--muted); }

/* ── 引言（老闆的話）、數字 ─────────────────────────── */
.fai-quote { font: 700 clamp(20px, 2.6vw, 26px)/1.5 var(--f-body); border-left: 3px solid var(--flow); padding-left: 20px; margin: 0 0 16px; }
.fai-stat { font: 700 40px/1 var(--f-display); color: var(--copper); }

/* ── 頁首主視覺 ─────────────────────────────────────── */
.fai-hero { position: relative; padding: 96px 0 88px; overflow: hidden; }
.fai-hero--page { padding: 72px 0 56px; border-bottom: 1px solid var(--line); }
.fai-hero__bg {
  position: absolute; inset: 0; background: url("/web/content/1149/pattern_lattice.svg?unique=96d89ab729") center / cover no-repeat;
  opacity: .5; pointer-events: none;
  -webkit-mask-image: linear-gradient(90deg, transparent 0%, #000 55%);
          mask-image: linear-gradient(90deg, transparent 0%, #000 55%);
}
:root[data-theme="dark"] .fai-hero__bg { opacity: .14; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .fai-hero__bg { opacity: .14; } }
.fai-hero .fai-container { position: relative; }
.fai-hero h1 { max-width: 820px; }
.fai-hero .fai-lead { max-width: 680px; }
.fai-breadcrumb { font-size: 13px; color: var(--muted); margin-bottom: 18px; }
.fai-breadcrumb a { color: var(--muted); }

/* ── 標語 ─────────────────────────────────────────── */
.fai-tagline-en { font: 600 15px/1.4 var(--f-display); color: var(--muted); letter-spacing: .01em; }
.fai-tagline-en b { color: var(--flow-text); font-weight: 700; }

/* ── 待補標記：demo 用，上架前要換掉或刪掉 ──────────────── */
.fai-todo { background: #FFF4D6; color: #6B4E00; border: 1px dashed #D9A400; border-radius: 4px; padding: 0 4px; font-size: .92em; }
.fai-note {
  font-size: 13px; color: var(--muted); border: 1px dashed var(--line); border-radius: 10px; padding: 12px 16px;
}

/* ── 頁尾行動呼籲 ─────────────────────────────────────── */
.fai-cta { text-align: center; }
.fai-cta h2 { margin-bottom: 12px; }
.fai-cta .fai-btn-row { justify-content: center; }

/* ── Header ─────────────────────────────────────────── */
.fai-header {
  position: sticky; top: 0; z-index: 50; height: 64px;
  /* 實色背景：半透明＋毛玻璃在部分環境不生效，捲動時內容會透出來 */
  background: var(--paper);
  box-shadow: 0 1px 0 var(--line), 0 6px 18px rgba(15,36,56,.05);
  border-bottom: 1px solid var(--line);
}
.fai-header .fai-container { display: flex; align-items: center; height: 100%; gap: 24px; }
.fai-logo { display: flex; align-items: center; flex-shrink: 0; }
.fai-logo img { height: 30px; width: auto; display: block; }
.fai-logo .fai-logo--dark { display: none; }
:root[data-theme="dark"] .fai-logo .fai-logo--light { display: none; }
:root[data-theme="dark"] .fai-logo .fai-logo--dark { display: block; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .fai-logo .fai-logo--light { display: none; }
  :root:not([data-theme="light"]) .fai-logo .fai-logo--dark { display: block; }
}
.fai-nav { display: flex; align-items: center; gap: 4px; margin-left: auto; }
.fai-nav > a, .fai-nav__group > a {
  display: block; padding: 8px 12px; border-radius: 8px; color: var(--ink); text-decoration: none; font-size: 15px; font-weight: 500;
}
.fai-nav > a:hover, .fai-nav__group > a:hover { background: var(--soft); }
.fai-nav a[aria-current="page"] { color: var(--flow-text); font-weight: 700; }
.fai-nav__group { position: relative; }
.fai-nav__menu {
  position: absolute; top: 100%; left: 0; min-width: 260px; padding: 8px; display: none;
  background: var(--sheet); border: 1px solid var(--line); border-radius: 12px; box-shadow: var(--shadow);
}
.fai-nav__group:hover .fai-nav__menu, .fai-nav__group:focus-within .fai-nav__menu { display: block; }
.fai-nav__menu a { display: block; padding: 10px 12px; border-radius: 8px; color: var(--ink); text-decoration: none; }
.fai-nav__menu a:hover { background: var(--soft); }
.fai-nav__menu small { display: block; font-size: 12px; color: var(--muted); }
.fai-nav .fai-btn { margin-left: 8px; padding: 10px 18px; }
.fai-theme-btn, .fai-menu-btn {
  border: 1px solid var(--line); background: transparent; color: var(--ink); border-radius: 8px;
  width: 38px; height: 38px; cursor: pointer; font-size: 16px; flex-shrink: 0;
}
.fai-menu-btn { display: none; }
.fai-theme-btn { display: none !important; } /* 全站固定淺色，切換按鈕先隱藏 */
@media (max-width: 1080px) {
  .fai-menu-btn { display: block; margin-left: auto; }
  .fai-nav {
    display: none; position: absolute; top: 64px; left: 0; right: 0; flex-direction: column; align-items: stretch;
    background: var(--sheet); border-bottom: 1px solid var(--line); padding: 12px 16px 20px; gap: 0;
    max-height: calc(100vh - 64px); overflow-y: auto;
  }
  .fai-header.is-open .fai-nav { display: flex; }
  .fai-nav__menu { position: static; display: block; border: 0; box-shadow: none; padding: 0 0 0 12px; background: transparent; }
  .fai-nav .fai-btn { margin: 12px 0 0; justify-content: center; }
}

/* ── Footer ─────────────────────────────────────────── */
.fai-footer { background: var(--dark); color: var(--dark-muted); padding: 64px 0 32px; font-size: 14px; }
.fai-footer a { color: var(--dark-muted); text-decoration: none; }
.fai-footer a:hover { color: #fff; }
.fai-footer__grid { display: grid; grid-template-columns: 1.4fr repeat(4, 1fr); gap: 32px; }
.fai-footer h4 { color: var(--dark-fg); font: 700 14px/1.4 var(--f-body); margin-bottom: 14px; }
.fai-footer ul { list-style: none; padding: 0; margin: 0; }
.fai-footer li { margin-bottom: 8px; }
.fai-footer__brand img { height: 28px; margin-bottom: 14px; }
.fai-footer__bottom { border-top: 1px solid rgba(255,255,255,.1); margin-top: 48px; padding-top: 24px; display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px; font-size: 13px; }
@media (max-width: 960px) { .fai-footer__grid { grid-template-columns: 1fr 1fr; } .fai-footer__brand { grid-column: 1 / -1; } }

/* ── 進場動畫（尊重減少動態偏好） ───────────────────────── */
.fai-reveal { opacity: 0; transform: translateY(16px); transition: opacity .6s ease, transform .6s ease; }
.fai-reveal.is-in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .fai-reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ── 列印 ─────────────────────────────────────────── */
@media print {
  .fai-header, .fai-theme-btn, .fai-menu-btn, .fai-hero__bg { display: none !important; }
  body { background: #fff; color: #000; }
  .fai-section { padding: 32px 0; break-inside: avoid; }
  .fai-reveal { opacity: 1; transform: none; }
  .fai-section--dark, .fai-footer { background: #fff; color: #000; }
}

/* ── 整合時補上的共用規則 ─────────────────────────────── */
[hidden] { display: none !important; }
/* 圖示深淺色切換：<img class="fai-icon--light" src="icon_x.svg"><img class="fai-icon--dark" src="icon_x_white.svg"> */
.fai-icon--dark { display: none; }
:root[data-theme="dark"] .fai-icon--light { display: none; }
:root[data-theme="dark"] .fai-icon--dark { display: inline-block; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .fai-icon--light { display: none; }
  :root:not([data-theme="light"]) .fai-icon--dark { display: inline-block; }
}