/* =================================================================
   ShareYourAI Help Center — v3 Neo-Brutalism
   navy + orange + butter | Bricolage + Hanken + Fraunces + JetBrains
   三欄佈局：左側導航 / 中間內容 / 右側目錄
   保留：section 切換、搜尋 modal、TOC scroll spy、FAQ 手風琴
   ================================================================= */

/* ========== Help Body 覆寫 ========== */
html:has(body.help-page),
html.help-html {
  overflow: auto !important;
  height: auto !important;
  scroll-behavior: smooth;
}

body.help-page {
  background: var(--brand-v3-cream);
  overflow-x: hidden;
  overflow-y: auto !important;
  height: auto !important;
  min-height: 100vh;
  font-family: var(--brand-v3-sans);
  color: var(--brand-v3-ink-soft);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* em → Fraunces italic 強調 */
body.help-page em,
body.help-page .help-italic {
  font-family: var(--brand-v3-serif);
  font-style: italic;
  font-weight: 500;
  color: var(--brand-v3-orange);
  font-variation-settings: "opsz" 144;
}

/* ========== 閱讀進度條 ========== */
.help-progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 3px;
  background: var(--brand-v3-orange);
  z-index: 10001;
  transition: width 80ms linear;
}

/* ========== 頂部導航 ========== */
.help-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(253, 251, 245, 0.88);
  backdrop-filter: saturate(1.4) blur(14px);
  -webkit-backdrop-filter: saturate(1.4) blur(14px);
  border-bottom: 2px solid transparent;
  transition: border-color 0.3s ease, background 0.3s ease;
}

.help-nav.scrolled {
  background: rgba(253, 251, 245, 0.96);
  border-bottom-color: var(--brand-v3-navy);
}

.help-nav-inner {
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  gap: 16px;
}

.help-nav-left {
  display: flex;
  align-items: center;
  gap: 16px;
  min-width: 0;
}

.help-nav-logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  cursor: pointer;
  flex-shrink: 0;
}

.help-nav-logo img {
  height: 28px;
  width: auto;
}

.help-nav-divider {
  width: 2px;
  height: 22px;
  background: var(--brand-v3-navy);
  opacity: 0.35;
  flex-shrink: 0;
}

.help-nav-title {
  font-family: var(--brand-v3-display);
  font-size: 15px;
  font-weight: 700;
  color: var(--brand-v3-navy);
  text-decoration: none;
  font-variation-settings: "opsz" 16, "wdth" 92;
  letter-spacing: -0.01em;
  white-space: nowrap;
  transition: color 0.2s ease;
}

.help-nav-title:hover {
  color: var(--brand-v3-orange);
}

/* 導航搜尋框 */
.help-nav-search {
  position: relative;
  width: 340px;
  flex-shrink: 1;
}

.help-nav-search input {
  width: 100%;
  padding: 10px 44px 10px 38px;
  border: 2px solid var(--brand-v3-navy);
  border-radius: 999px;
  background: var(--brand-v3-paper);
  color: var(--brand-v3-ink);
  font-family: var(--brand-v3-sans);
  font-size: 14px;
  font-weight: 500;
  outline: none;
  transition: box-shadow 0.2s ease;
}

.help-nav-search input:focus {
  box-shadow: var(--brand-v3-shadow-sm);
}

.help-nav-search input::placeholder {
  color: var(--brand-v3-muted);
  font-weight: 400;
}

.help-nav-search-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  width: 16px;
  height: 16px;
  color: var(--brand-v3-navy);
  pointer-events: none;
}

.help-nav-search-shortcut {
  position: absolute;
  right: 10px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--brand-v3-mono);
  font-size: 10.5px;
  font-weight: 600;
  padding: 3px 8px;
  border-radius: 6px;
  background: var(--brand-v3-butter);
  color: var(--brand-v3-navy);
  border: 1.5px solid var(--brand-v3-navy);
  pointer-events: none;
  letter-spacing: 0.04em;
}

/* 導航右側 */
.help-nav-right {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.help-lang-switcher {
  display: flex;
  align-items: center;
}

/* 行動版側邊欄語言切換 */
.help-mobile-lang-switcher-wrap {
  padding: 16px 20px;
  border-top: 2px solid var(--brand-v3-navy);
  margin-top: auto;
}

.help-mobile-lang-switcher {
  display: flex;
  justify-content: center;
}

/* 行動版選單按鈕 */
.help-mobile-menu-btn {
  display: none;
  background: var(--brand-v3-paper);
  border: 2px solid var(--brand-v3-navy);
  border-radius: 10px;
  cursor: pointer;
  padding: 8px;
  color: var(--brand-v3-navy);
  box-shadow: var(--brand-v3-shadow-sm);
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.help-mobile-menu-btn:hover {
  box-shadow: var(--brand-v3-shadow-md);
  transform: translate(-1px, -1px);
}

.help-mobile-menu-btn svg {
  width: 20px;
  height: 20px;
}

/* ========== 三欄主佈局 ========== */
.help-layout {
  display: flex;
  max-width: 1440px;
  margin: 0 auto;
  padding-top: 68px;
  height: calc(100vh - 68px);
  overflow: hidden;
}

/* ========== 左側導航欄 ========== */
.help-sidebar {
  width: 288px;
  min-width: 288px;
  border-right: 2px solid var(--brand-v3-navy);
  background: var(--brand-v3-cream);
  height: 100%;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 24px 0 32px;
  scrollbar-width: thin;
  scrollbar-color: var(--brand-v3-navy) transparent;
}

.help-sidebar::-webkit-scrollbar {
  width: 6px;
}

.help-sidebar::-webkit-scrollbar-track {
  background: transparent;
}

.help-sidebar::-webkit-scrollbar-thumb {
  background: var(--brand-v3-navy);
  border-radius: 4px;
  opacity: 0.3;
}

/* 適合誰卡片（貼紙 rotate -1deg，butter 底） */
.help-whoisitfor-card {
  display: block;
  margin: 0 18px 14px;
  padding: 16px 18px;
  background: var(--brand-v3-butter);
  border: 2.5px solid var(--brand-v3-navy);
  border-radius: 16px;
  cursor: pointer;
  text-decoration: none;
  color: var(--brand-v3-navy);
  box-shadow: var(--brand-v3-shadow-md);
  transform: rotate(-1deg);
  transition: transform 0.3s cubic-bezier(.2,.8,.2,1), box-shadow 0.3s ease;
}

.help-whoisitfor-card:focus { outline: none; }

.help-whoisitfor-card:hover {
  transform: rotate(0) translate(-2px, -2px);
  box-shadow: var(--brand-v3-shadow-lg);
}

.help-whoisitfor-card-icon {
  width: 38px;
  height: 38px;
  background: var(--brand-v3-navy);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--brand-v3-butter);
  margin-bottom: 10px;
  border: 2px solid var(--brand-v3-navy);
}

.help-whoisitfor-card-icon svg {
  width: 18px;
  height: 18px;
}

.help-whoisitfor-card h3 {
  font-family: var(--brand-v3-display);
  font-size: 15.5px;
  font-weight: 700;
  color: var(--brand-v3-navy);
  margin: 0 0 4px;
  letter-spacing: -0.01em;
  line-height: 1.25;
}

.help-whoisitfor-card p {
  font-family: var(--brand-v3-sans);
  font-size: 12.5px;
  color: var(--brand-v3-navy);
  opacity: 0.8;
  margin: 0;
  line-height: 1.5;
}

/* 快速開始卡片（貼紙 rotate +1deg，orange-soft 底） */
.help-quickstart-card {
  display: block;
  margin: 0 18px 22px;
  padding: 16px 18px;
  background: var(--brand-v3-orange-soft);
  border: 2.5px solid var(--brand-v3-navy);
  border-radius: 16px;
  cursor: pointer;
  text-decoration: none;
  color: var(--brand-v3-navy);
  box-shadow: var(--brand-v3-shadow-md);
  transform: rotate(1deg);
  transition: transform 0.3s cubic-bezier(.2,.8,.2,1), box-shadow 0.3s ease;
}

.help-quickstart-card:focus { outline: none; }

.help-quickstart-card:hover {
  transform: rotate(0) translate(-2px, -2px);
  box-shadow: var(--brand-v3-shadow-lg);
}

.help-quickstart-card-icon {
  width: 38px;
  height: 38px;
  background: var(--brand-v3-orange);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--brand-v3-paper);
  margin-bottom: 10px;
  border: 2px solid var(--brand-v3-navy);
}

.help-quickstart-card-icon svg {
  width: 18px;
  height: 18px;
}

.help-quickstart-card h3 {
  font-family: var(--brand-v3-display);
  font-size: 15.5px;
  font-weight: 700;
  color: var(--brand-v3-navy);
  margin: 0 0 4px;
  letter-spacing: -0.01em;
  line-height: 1.25;
}

.help-quickstart-card p {
  font-family: var(--brand-v3-sans);
  font-size: 12.5px;
  color: var(--brand-v3-navy);
  opacity: 0.8;
  margin: 0;
  line-height: 1.5;
}

/* Sidebar 分類群組 */
.help-nav-group {
  margin-bottom: 4px;
}

.help-nav-group-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 24px 8px;
  font-family: var(--brand-v3-mono);
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--brand-v3-muted);
  cursor: pointer;
  user-select: none;
  transition: color 0.2s ease;
}

.help-nav-group-header:hover {
  color: var(--brand-v3-navy);
}

.help-nav-group-header svg {
  width: 14px;
  height: 14px;
  transition: transform 0.2s ease;
}

.help-nav-group.collapsed .help-nav-group-header svg {
  transform: rotate(-90deg);
}

.help-nav-group-items {
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.help-nav-group.collapsed .help-nav-group-items {
  max-height: 0 !important;
}

/* Sidebar 導航項目 */
.help-nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 20px 9px 24px;
  font-family: var(--brand-v3-sans);
  font-size: 14px;
  font-weight: 500;
  color: var(--brand-v3-ink-soft);
  text-decoration: none;
  cursor: pointer;
  border-left: 3px solid transparent;
  line-height: 1.4;
  outline: none;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.help-nav-item:focus,
.help-quickstart-card:focus,
.help-sidebar a:focus {
  outline: none;
}

.help-nav-item:hover {
  background: var(--brand-v3-butter);
  color: var(--brand-v3-navy);
}

.help-nav-item.active {
  color: var(--brand-v3-navy);
  background: var(--brand-v3-butter);
  border-left-color: var(--brand-v3-orange);
  font-weight: 700;
}

.help-nav-item-icon {
  width: 17px;
  height: 17px;
  min-width: 17px;
  color: var(--brand-v3-muted);
}

.help-nav-item.active .help-nav-item-icon {
  color: var(--brand-v3-orange);
}

.help-nav-item-badge {
  margin-left: auto;
  font-family: var(--brand-v3-mono);
  font-size: 10px;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 999px;
  background: var(--brand-v3-navy);
  color: var(--brand-v3-cream);
  letter-spacing: 0.06em;
}

.help-nav-item.active .help-nav-item-badge {
  background: var(--brand-v3-orange);
  color: var(--brand-v3-paper);
}

/* ========== 中間主要內容區 ========== */
.help-main {
  flex: 1;
  min-width: 0;
  max-width: 820px;
  padding: 36px 56px 80px;
  height: 100%;
  overflow-y: auto;
  scroll-behavior: smooth;
  position: relative;
}

/* 麵包屑導航 */
.help-breadcrumb {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--brand-v3-mono);
  font-size: 11.5px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--brand-v3-muted);
  margin-bottom: 28px;
}

.help-breadcrumb a {
  color: var(--brand-v3-muted);
  text-decoration: none;
  cursor: pointer;
  transition: color 0.2s ease;
}

.help-breadcrumb a:hover {
  color: var(--brand-v3-orange);
}

.help-breadcrumb-sep {
  color: var(--brand-v3-navy);
  opacity: 0.3;
}

.help-breadcrumb-current {
  color: var(--brand-v3-navy);
}

/* 文章頁頭 */
.help-article-header {
  margin-bottom: 44px;
  padding-bottom: 28px;
  border-bottom: 2px solid var(--brand-v3-navy);
}

.help-article-header h1 {
  font-family: var(--brand-v3-display);
  font-size: clamp(30px, 3.5vw, 44px);
  font-weight: 800;
  color: var(--brand-v3-navy);
  margin: 0 0 16px;
  line-height: 1.02;
  letter-spacing: -0.035em;
  font-variation-settings: "opsz" 72, "wdth" 92;
}

.help-article-meta {
  display: flex;
  align-items: center;
  gap: 20px;
  font-family: var(--brand-v3-mono);
  font-size: 11.5px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--brand-v3-ink-soft);
}

.help-article-meta-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

.help-article-meta-item svg {
  width: 14px;
  height: 14px;
  color: var(--brand-v3-orange);
}

/* ========== 內容排版 ========== */
.help-content h2 {
  font-family: var(--brand-v3-display);
  font-size: clamp(26px, 2.6vw, 34px);
  font-weight: 800;
  color: var(--brand-v3-navy);
  margin: 56px 0 20px;
  padding-top: 32px;
  border-top: 2px solid var(--brand-v3-navy);
  scroll-margin-top: 88px;
  line-height: 1.08;
  letter-spacing: -0.03em;
  font-variation-settings: "opsz" 72, "wdth" 92;
}

.help-content h2:first-child,
.help-content section:first-child h2 {
  margin-top: 0;
  padding-top: 0;
  border-top: none;
}

.help-content h3 {
  font-family: var(--brand-v3-display);
  font-size: 20px;
  font-weight: 700;
  color: var(--brand-v3-navy);
  margin: 36px 0 14px;
  scroll-margin-top: 88px;
  line-height: 1.25;
  letter-spacing: -0.01em;
}

.help-content h4 {
  font-family: var(--brand-v3-display);
  font-size: 16px;
  font-weight: 700;
  color: var(--brand-v3-navy);
  margin: 26px 0 10px;
  line-height: 1.3;
}

.help-content p {
  font-family: var(--brand-v3-sans);
  font-size: 15.5px;
  margin: 0 0 18px;
  line-height: 1.72;
  color: var(--brand-v3-ink-soft);
}

.help-content ul,
.help-content ol {
  margin: 0 0 20px;
  padding-left: 26px;
  font-size: 15.5px;
}

.help-content li {
  margin-bottom: 10px;
  line-height: 1.68;
  color: var(--brand-v3-ink-soft);
}

.help-content ul li::marker,
.help-content ol li::marker {
  color: var(--brand-v3-orange);
  font-weight: 700;
}

.help-content strong {
  color: var(--brand-v3-navy);
  font-weight: 700;
}

.help-content a {
  color: var(--brand-v3-orange);
  text-decoration: none;
  border-bottom: 2px solid var(--brand-v3-orange-soft);
  transition: border-color 0.2s ease, color 0.2s ease;
  font-weight: 600;
}

.help-content a:hover {
  color: var(--brand-v3-orange-deep);
  border-bottom-color: var(--brand-v3-orange);
}

/* Hero tagline（Who is it for 區塊） */
.help-hero-tagline {
  font-family: var(--brand-v3-serif) !important;
  font-style: italic;
  font-size: 1.3rem !important;
  font-weight: 500 !important;
  color: var(--brand-v3-orange) !important;
  margin-bottom: 10px !important;
  font-variation-settings: "opsz" 144;
  line-height: 1.35 !important;
}

/* ========== 表格 ========== */
.help-table-wrap {
  overflow-x: auto;
  margin: 0 0 28px;
  border-radius: 14px;
  border: 2.5px solid var(--brand-v3-navy);
  box-shadow: var(--brand-v3-shadow-md);
  background: var(--brand-v3-paper);
}

.help-content table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--brand-v3-sans);
  font-size: 14px;
}

.help-content table th {
  background: var(--brand-v3-butter);
  font-family: var(--brand-v3-mono);
  font-weight: 700;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--brand-v3-navy);
  text-align: left;
  padding: 12px 16px;
  border-bottom: 2px solid var(--brand-v3-navy);
  white-space: nowrap;
}

.help-content table td {
  padding: 12px 16px;
  border-bottom: 1.5px solid var(--brand-v3-off);
  color: var(--brand-v3-ink-soft);
  vertical-align: top;
  line-height: 1.55;
}

.help-content table tr:last-child td {
  border-bottom: none;
}

.help-content table tr:hover td {
  background: var(--brand-v3-cream);
}

.help-content table td strong {
  color: var(--brand-v3-navy);
}

/* ========== 方案標籤（表格內） ========== */
.help-plan-tag {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 4px;
  font-family: var(--brand-v3-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  line-height: 1.5;
  border: 1.5px solid var(--brand-v3-navy);
}

.help-plan-tag-business {
  background: var(--brand-v3-orange);
  color: var(--brand-v3-paper);
}

.help-plan-tag-pro {
  background: var(--brand-v3-butter);
  color: var(--brand-v3-navy);
}

/* ========== 表格附註 ========== */
.help-table-footnote {
  font-size: 13px;
  color: var(--brand-v3-navy);
  opacity: 0.7;
  margin: -20px 0 28px;
  font-style: italic;
  line-height: 1.6;
}

/* ========== 價格指引（方案比較表上方） ========== */
.help-price-note {
  font-size: 14px;
  color: var(--brand-v3-navy);
  background: var(--brand-v3-butter);
  border: 2px solid var(--brand-v3-navy);
  border-radius: 10px;
  padding: 12px 16px;
  margin: 0 0 20px;
  line-height: 1.6;
}

.help-price-note a {
  color: var(--brand-v3-orange);
  font-weight: 700;
  text-decoration: underline;
}

.help-price-note a:hover {
  color: var(--brand-v3-navy);
}

/* ========== 程式碼區塊 ========== */
.help-code-block {
  margin: 0 0 28px;
  border-radius: 14px;
  overflow: hidden;
  border: 2.5px solid var(--brand-v3-navy);
  box-shadow: var(--brand-v3-shadow-md);
}

.help-code-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--brand-v3-navy);
  padding: 10px 16px;
  font-family: var(--brand-v3-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--brand-v3-cream);
  border-bottom: 2px solid var(--brand-v3-navy);
}

.help-code-header-lang {
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.help-code-copy-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  background: transparent;
  border: 1.5px solid var(--brand-v3-cream);
  color: var(--brand-v3-cream);
  cursor: pointer;
  font-family: var(--brand-v3-mono);
  font-size: 11px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 6px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  transition: background 0.2s ease, color 0.2s ease;
}

.help-code-copy-btn:hover {
  background: var(--brand-v3-orange);
  color: var(--brand-v3-paper);
  border-color: var(--brand-v3-orange);
}

.help-code-copy-btn svg {
  width: 13px;
  height: 13px;
}

.help-code-body {
  background: var(--brand-v3-navy-deep);
  padding: 18px 20px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.help-code-body pre {
  margin: 0;
  font-family: var(--brand-v3-mono);
  font-size: 13px;
  line-height: 1.7;
  color: #D5DAE8;   /* 淺灰藍，navy-deep 底上唯一配色例外 */
}

.help-code-body .code-keyword { color: var(--brand-v3-orange); font-weight: 600; }
.help-code-body .code-string  { color: var(--brand-v3-butter); }
.help-code-body .code-comment { color: var(--brand-v3-muted); font-style: italic; }
.help-code-body .code-highlight { color: var(--brand-v3-orange-soft); font-weight: 500; }

/* 行內程式碼 */
.help-content code {
  font-family: var(--brand-v3-mono);
  font-size: 0.88em;
  font-weight: 600;
  padding: 2px 7px;
  border-radius: 5px;
  background: var(--brand-v3-butter);
  color: var(--brand-v3-navy);
  border: 1.5px solid var(--brand-v3-navy);
}

/* ========== Callout 提示框（統一 navy border + left accent bar） ========== */
.help-callout {
  position: relative;
  display: flex;
  gap: 12px;
  padding: 16px 18px 16px 22px;
  border: 2.5px solid var(--brand-v3-navy);
  border-radius: 14px;
  margin: 0 0 24px;
  font-family: var(--brand-v3-sans);
  font-size: 14.5px;
  line-height: 1.6;
  background: var(--brand-v3-paper);
  box-shadow: var(--brand-v3-shadow-sm);
}

.help-callout::before {
  content: '';
  position: absolute;
  left: -2.5px;
  top: -2.5px;
  bottom: -2.5px;
  width: 6px;
  background: var(--brand-v3-navy);
  border-top-left-radius: 12px;
  border-bottom-left-radius: 12px;
}

.help-callout-icon {
  min-width: 22px;
  height: 22px;
  margin-top: 1px;
  color: var(--brand-v3-navy);
}

.help-callout-icon svg {
  width: 22px;
  height: 22px;
}

.help-callout-content {
  flex: 1;
}

.help-callout-content strong {
  display: block;
  margin-bottom: 4px;
  color: var(--brand-v3-navy);
  font-weight: 700;
}

/* Callout 變體：左條 + icon + 底色 4 種語義
   tip/danger 需要綠/紅語意色 — v3 token 未定義 semantic 色，故在此 hardcode
   日後若多頁共用再提升到 public-variables-v3.css */
.help-callout.tip {
  background: #F3FAE8;                    /* 綠 mist */
}
.help-callout.tip::before { background: #4A7A2C; }      /* 深橄欖綠 */
.help-callout.tip .help-callout-icon { color: #4A7A2C; }

.help-callout.info {
  background: var(--brand-v3-cream-2);
}
.help-callout.info::before { background: var(--brand-v3-navy); }
.help-callout.info .help-callout-icon { color: var(--brand-v3-navy); }

.help-callout.warning {
  background: var(--brand-v3-orange-soft);
}
.help-callout.warning::before { background: var(--brand-v3-orange-deep); }
.help-callout.warning .help-callout-icon { color: var(--brand-v3-orange-deep); }

.help-callout.danger {
  background: #FDE3E3;                    /* 紅 mist */
}
.help-callout.danger::before { background: #B02A2A; }   /* 磚紅 */
.help-callout.danger .help-callout-icon { color: #B02A2A; }

/* ========== 使用場景卡片網格（裝飾貼紙，交錯 rotate） ========== */
.help-use-case-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 22px 18px;
  margin: 24px 0 28px;
  padding: 4px 2px 10px;  /* 避免 rotate 裁切 */
}

.help-use-case-card {
  background: var(--brand-v3-paper);
  border: 2.5px solid var(--brand-v3-navy);
  border-radius: 18px;
  padding: 20px;
  box-shadow: var(--brand-v3-shadow-md);
  transition: transform 0.3s cubic-bezier(.2,.8,.2,1), box-shadow 0.3s ease;
  will-change: transform;
}

.help-use-case-card:nth-child(odd) {
  transform: rotate(-1deg);
}

.help-use-case-card:nth-child(even) {
  transform: rotate(1deg);
}

.help-use-case-card:nth-child(3n) {
  transform: rotate(-0.6deg);
}

.help-use-case-card:hover {
  transform: rotate(0) translate(-2px, -2px);
  box-shadow: var(--brand-v3-shadow-lg);
}

.help-use-case-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--brand-v3-butter);
  color: var(--brand-v3-navy);
  border: 2px solid var(--brand-v3-navy);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 14px;
}

.help-use-case-icon svg {
  width: 22px;
  height: 22px;
}

.help-use-case-card h4 {
  font-family: var(--brand-v3-display);
  font-size: 16px;
  font-weight: 700;
  color: var(--brand-v3-navy);
  margin: 0 0 8px;
  line-height: 1.22;
  letter-spacing: -0.01em;
}

.help-use-case-card p {
  font-family: var(--brand-v3-sans);
  font-size: 13.5px;
  color: var(--brand-v3-ink-soft);
  margin: 0;
  line-height: 1.6;
}

/* ========== 怎麼運作水平流程 ========== */
.help-how-it-works {
  display: flex;
  align-items: stretch;
  gap: 14px;
  margin: 24px 0 28px;
  flex-wrap: wrap;
}

.help-how-step {
  flex: 1;
  min-width: 160px;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  background: var(--brand-v3-paper);
  border: 2.5px solid var(--brand-v3-navy);
  border-radius: 14px;
  padding: 14px 16px;
  box-shadow: var(--brand-v3-shadow-sm);
}

.help-how-step-num {
  width: 30px;
  height: 30px;
  min-width: 30px;
  border-radius: 50%;
  background: var(--brand-v3-orange);
  color: var(--brand-v3-paper);
  font-family: var(--brand-v3-display);
  font-weight: 800;
  font-size: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px solid var(--brand-v3-navy);
}

.help-how-step-text {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.help-how-step-text strong {
  font-family: var(--brand-v3-display);
  font-size: 14.5px;
  font-weight: 700;
  color: var(--brand-v3-navy);
}

.help-how-step-text span {
  font-family: var(--brand-v3-sans);
  font-size: 13px;
  color: var(--brand-v3-ink-soft);
  line-height: 1.5;
}

.help-how-step-arrow {
  color: var(--brand-v3-orange);
  display: flex;
  align-items: center;
}

.help-how-step-arrow svg {
  width: 20px;
  height: 20px;
}

/* ========== 步驟列表（垂直） ========== */
.help-steps {
  margin: 0 0 28px;
  padding: 0;
  list-style: none;
  counter-reset: help-step;
}

.help-step {
  display: flex;
  gap: 16px;
  margin-bottom: 22px;
  counter-increment: help-step;
}

.help-step-number {
  width: 32px;
  height: 32px;
  min-width: 32px;
  background: var(--brand-v3-butter);
  color: var(--brand-v3-navy);
  border: 2px solid var(--brand-v3-navy);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--brand-v3-display);
  font-size: 14px;
  font-weight: 800;
  margin-top: 2px;
  box-shadow: var(--brand-v3-shadow-sm);
}

.help-step-content {
  flex: 1;
}

.help-step-content h4 {
  margin: 0 0 8px;
  font-family: var(--brand-v3-display);
  font-size: 15.5px;
  font-weight: 700;
  color: var(--brand-v3-navy);
}

.help-step-content p {
  margin: 0 0 12px;
  font-size: 14.5px;
  color: var(--brand-v3-ink-soft);
}

/* ol.help-steps 形式（numbered 列表） */
ol.help-steps {
  counter-reset: help-step;
  padding-left: 0;
  list-style: none;
}

ol.help-steps > li {
  position: relative;
  padding-left: 44px;
  margin-bottom: 14px;
  counter-increment: help-step;
  line-height: 1.65;
}

ol.help-steps > li::before {
  content: counter(help-step);
  position: absolute;
  left: 0;
  top: 0;
  width: 30px;
  height: 30px;
  background: var(--brand-v3-butter);
  color: var(--brand-v3-navy);
  border: 2px solid var(--brand-v3-navy);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--brand-v3-display);
  font-size: 13px;
  font-weight: 800;
}

/* ========== FAQ 手風琴 ========== */
.help-faq-group {
  margin-bottom: 36px;
}

.help-faq-group-title {
  font-family: var(--brand-v3-display) !important;
  font-size: 20px !important;
  font-weight: 700 !important;
  color: var(--brand-v3-navy) !important;
  margin: 0 0 16px !important;
  display: flex;
  align-items: center;
  gap: 10px;
}

.help-faq-group-title svg {
  color: var(--brand-v3-orange) !important;
}

.help-faq-item {
  border: 2.5px solid var(--brand-v3-navy);
  border-radius: 14px;
  margin-bottom: 12px;
  overflow: hidden;
  background: var(--brand-v3-paper);
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.help-faq-item:hover {
  box-shadow: var(--brand-v3-shadow-sm);
}

.help-faq-item.open {
  box-shadow: var(--brand-v3-shadow-md);
  background: var(--brand-v3-cream);
}

.help-faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 18px;
  font-family: var(--brand-v3-sans);
  font-size: 14.5px;
  font-weight: 600;
  color: var(--brand-v3-navy);
  cursor: pointer;
  user-select: none;
  background: transparent;
  transition: background 0.2s ease;
  line-height: 1.45;
}

.help-faq-question:hover {
  background: var(--brand-v3-butter);
}

.help-faq-item.open .help-faq-question {
  background: var(--brand-v3-butter);
  border-bottom: 2px solid var(--brand-v3-navy);
}

.help-faq-question svg {
  width: 18px;
  height: 18px;
  min-width: 18px;
  color: var(--brand-v3-navy);
  transition: transform 0.25s ease;
}

.help-faq-item.open .help-faq-question svg {
  transform: rotate(180deg);
  color: var(--brand-v3-orange);
}

.help-faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.help-faq-answer-inner {
  padding: 14px 18px 16px;
  font-family: var(--brand-v3-sans);
  font-size: 14px;
  color: var(--brand-v3-ink-soft);
  line-height: 1.72;
}

.help-faq-item.open .help-faq-answer {
  max-height: 800px;
}

/* ========== 圖片預留位（虛線裝飾） ========== */
.help-image-placeholder {
  margin: 0 0 28px;
  border-radius: 16px;
  border: 2.5px dashed var(--brand-v3-navy);
  background: var(--brand-v3-cream-2);
  /* 預設隱藏：線上尚無實際圖片，不顯示佔位框 */
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 36px 24px;
  min-height: 200px;
  transform: rotate(-0.4deg);
  transition: transform 0.3s ease, background 0.3s ease;
}

/* 本地開發環境才顯示圖片預留位提示（html.is-local-env 由 console-guard.js 旗標設定） */
.is-local-env .help-image-placeholder {
  display: flex;
}

.help-image-placeholder:hover {
  transform: rotate(0) translate(-2px, -2px);
  background: var(--brand-v3-butter);
}

.help-image-placeholder svg {
  width: 44px;
  height: 44px;
  color: var(--brand-v3-navy);
  opacity: 0.45;
  margin-bottom: 14px;
}

.help-image-placeholder-label {
  font-family: var(--brand-v3-display);
  font-size: 15px;
  font-weight: 700;
  color: var(--brand-v3-navy);
  margin-bottom: 6px;
}

.help-image-placeholder-spec {
  font-family: var(--brand-v3-mono);
  font-size: 11.5px;
  font-weight: 500;
  color: var(--brand-v3-muted);
  letter-spacing: 0.04em;
}

/* ========== 分頁標籤 ========== */
.help-tabs {
  display: flex;
  gap: 6px;
  margin-bottom: 28px;
  border-bottom: 2.5px solid var(--brand-v3-navy);
  padding-bottom: 0;
}

.help-tab {
  padding: 11px 20px;
  font-family: var(--brand-v3-sans);
  font-size: 14px;
  font-weight: 600;
  color: var(--brand-v3-muted);
  background: transparent;
  border: none;
  cursor: pointer;
  border-bottom: 3px solid transparent;
  margin-bottom: -2.5px;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.help-tab:hover {
  color: var(--brand-v3-navy);
}

.help-tab.active {
  color: var(--brand-v3-navy);
  border-bottom-color: var(--brand-v3-orange);
  font-weight: 700;
}

/* 區段分隔（section 切換模式下隱藏） */
.help-section-divider {
  display: none;
}

/* ========== 右側輔助欄（TOC） ========== */
.help-aside {
  width: 264px;
  min-width: 264px;
  height: 100%;
  overflow-y: auto;
  padding: 32px 20px 32px 8px;
  scrollbar-width: thin;
  scrollbar-color: var(--brand-v3-navy) transparent;
}

.help-aside::-webkit-scrollbar {
  width: 4px;
}

.help-aside::-webkit-scrollbar-thumb {
  background: var(--brand-v3-navy);
  border-radius: 4px;
  opacity: 0.3;
}

/* 目錄 (On this page) */
.help-toc {
  margin-bottom: 28px;
}

.help-toc-title {
  font-family: var(--brand-v3-mono);
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--brand-v3-muted);
  margin-bottom: 14px;
  padding: 0 12px;
}

.help-toc-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.help-toc-item {
  margin-bottom: 2px;
}

.help-toc-link {
  display: block;
  padding: 5px 12px;
  font-family: var(--brand-v3-sans);
  font-size: 13px;
  font-weight: 500;
  color: var(--brand-v3-muted);
  text-decoration: none;
  border-left: 2px solid var(--brand-v3-off);
  line-height: 1.45;
  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
  cursor: pointer;
}

.help-toc-link:focus,
.help-toc-link:focus-visible {
  outline: none;
  box-shadow: none;
}

.help-toc-link:hover {
  color: var(--brand-v3-navy);
  border-left-color: var(--brand-v3-navy);
  background: var(--brand-v3-butter);
}

.help-toc-link.active {
  color: var(--brand-v3-navy);
  border-left: 3px solid var(--brand-v3-orange);
  background: var(--brand-v3-butter);
  font-weight: 700;
}

.help-toc-link.indent {
  padding-left: 24px;
  font-size: 12px;
}

/* 輔助卡片通用 */
.help-aside-card {
  background: var(--brand-v3-paper);
  border: 2.5px solid var(--brand-v3-navy);
  border-radius: 14px;
  padding: 16px;
  margin-bottom: 18px;
  box-shadow: var(--brand-v3-shadow-sm);
}

.help-aside-card-title {
  font-family: var(--brand-v3-mono);
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--brand-v3-muted);
  margin-bottom: 12px;
}

/* 相關文章 */
.help-related-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.help-related-item {
  margin-bottom: 8px;
}

.help-related-link {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-family: var(--brand-v3-sans);
  font-size: 13px;
  color: var(--brand-v3-ink-soft);
  text-decoration: none;
  padding: 7px 10px;
  border-radius: 8px;
  transition: background 0.2s ease, color 0.2s ease;
  cursor: pointer;
  line-height: 1.4;
}

.help-related-link:hover {
  background: var(--brand-v3-butter);
  color: var(--brand-v3-navy);
}

.help-related-link svg {
  width: 14px;
  height: 14px;
  min-width: 14px;
  margin-top: 2px;
  color: var(--brand-v3-muted);
}

.help-related-link:hover svg {
  color: var(--brand-v3-orange);
}

/* 快速提示卡片（可選貼紙） */
.help-tip-card {
  background: var(--brand-v3-butter);
  border: 2.5px solid var(--brand-v3-navy);
  border-radius: 14px;
  padding: 16px;
  margin-bottom: 18px;
  box-shadow: var(--brand-v3-shadow-md);
  transform: rotate(-0.8deg);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.help-tip-card:hover {
  transform: rotate(0) translate(-2px, -2px);
  box-shadow: var(--brand-v3-shadow-lg);
}

.help-tip-card-icon {
  width: 32px;
  height: 32px;
  background: var(--brand-v3-navy);
  color: var(--brand-v3-butter);
  border: 2px solid var(--brand-v3-navy);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 10px;
}

.help-tip-card-icon svg {
  width: 16px;
  height: 16px;
}

.help-tip-card h4 {
  font-family: var(--brand-v3-display);
  font-size: 14.5px;
  font-weight: 700;
  color: var(--brand-v3-navy);
  margin: 0 0 6px;
}

.help-tip-card p {
  font-family: var(--brand-v3-sans);
  font-size: 13px;
  color: var(--brand-v3-navy);
  opacity: 0.85;
  margin: 0;
  line-height: 1.5;
}

/* 需要幫助 CTA */
.help-support-card {
  background: var(--brand-v3-navy);
  border: 2.5px solid var(--brand-v3-navy);
  border-radius: 14px;
  padding: 22px 18px;
  text-align: center;
  margin-bottom: 18px;
  box-shadow: var(--brand-v3-shadow-md);
}

.help-support-card-icon {
  width: 44px;
  height: 44px;
  background: var(--brand-v3-orange);
  border: 2px solid var(--brand-v3-paper);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 14px;
  color: var(--brand-v3-paper);
}

.help-support-card-icon svg {
  width: 20px;
  height: 20px;
}

.help-support-card h4 {
  font-family: var(--brand-v3-display);
  font-size: 15.5px;
  font-weight: 700;
  color: var(--brand-v3-cream);
  margin: 0 0 6px;
}

.help-support-card p {
  font-family: var(--brand-v3-sans);
  font-size: 12.5px;
  color: var(--brand-v3-cream);
  opacity: 0.78;
  margin: 0 0 14px;
  line-height: 1.5;
}

.help-support-card-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 18px;
  background: var(--brand-v3-orange);
  color: var(--brand-v3-paper);
  border: 2px solid var(--brand-v3-paper);
  border-radius: 999px;
  font-family: var(--brand-v3-sans);
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.2s ease, transform 0.2s ease;
}

.help-support-card-btn:hover {
  background: var(--brand-v3-orange-deep);
  transform: translate(-1px, -1px);
}

.help-support-card-btn svg {
  width: 14px;
  height: 14px;
}

/* 方案速查卡片 */
.help-plan-card {
  border: 2.5px solid var(--brand-v3-navy);
  border-radius: 14px;
  overflow: hidden;
  margin-bottom: 18px;
  background: var(--brand-v3-paper);
  box-shadow: var(--brand-v3-shadow-sm);
}

.help-plan-card-header {
  padding: 12px 16px;
  background: var(--brand-v3-butter);
  border-bottom: 2px solid var(--brand-v3-navy);
}

.help-plan-card-header h4 {
  font-family: var(--brand-v3-mono);
  font-size: 11.5px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--brand-v3-navy);
  margin: 0;
}

.help-plan-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 9px 16px;
  font-family: var(--brand-v3-sans);
  font-size: 12.5px;
  border-bottom: 1.5px solid var(--brand-v3-off);
}

.help-plan-row:last-child {
  border-bottom: none;
}

.help-plan-row-label {
  color: var(--brand-v3-ink-soft);
}

.help-plan-row-values {
  display: flex;
  gap: 6px;
}

.help-plan-badge {
  padding: 2px 8px;
  border-radius: 999px;
  font-family: var(--brand-v3-mono);
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  border: 1.5px solid var(--brand-v3-navy);
}

.help-plan-badge.free {
  background: var(--brand-v3-cream-2);
  color: var(--brand-v3-muted);
}

.help-plan-badge.pro {
  background: var(--brand-v3-orange-soft);
  color: var(--brand-v3-navy);
}

.help-plan-badge.biz {
  background: var(--brand-v3-navy);
  color: var(--brand-v3-cream);
}

/* Aside 圖片卡片 */
.help-aside-image {
  border-radius: 14px;
  overflow: hidden;
  border: 2.5px solid var(--brand-v3-navy);
  margin-bottom: 18px;
  box-shadow: var(--brand-v3-shadow-sm);
}

.help-aside-image-placeholder {
  background: var(--brand-v3-cream-2);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 26px 16px;
  text-align: center;
}

.help-aside-image-placeholder svg {
  width: 32px;
  height: 32px;
  color: var(--brand-v3-navy);
  opacity: 0.4;
  margin-bottom: 8px;
}

.help-aside-image-placeholder-text {
  font-family: var(--brand-v3-mono);
  font-size: 11.5px;
  color: var(--brand-v3-muted);
  line-height: 1.5;
}

.help-aside-image-caption {
  padding: 9px 14px;
  font-family: var(--brand-v3-sans);
  font-size: 12.5px;
  color: var(--brand-v3-ink-soft);
  background: var(--brand-v3-paper);
  border-top: 2px solid var(--brand-v3-navy);
}

/* ========== 回到頂部按鈕 ========== */
.help-back-to-top {
  position: fixed;
  bottom: 28px;
  right: 28px;
  width: 48px;
  height: 48px;
  background: var(--brand-v3-orange);
  color: var(--brand-v3-paper);
  border: 2.5px solid var(--brand-v3-navy);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: var(--brand-v3-shadow-md);
  transition: transform 0.25s cubic-bezier(.2,.8,.2,1), box-shadow 0.25s ease, opacity 0.25s ease;
  opacity: 0;
  pointer-events: none;
  z-index: 999;
}

.help-back-to-top.visible {
  opacity: 1;
  pointer-events: auto;
}

.help-back-to-top:hover {
  background: var(--brand-v3-orange-deep);
  transform: translate(-2px, -2px);
  box-shadow: var(--brand-v3-shadow-lg);
}

.help-back-to-top svg {
  width: 20px;
  height: 20px;
}

/* ========== 搜尋 Overlay + Modal ========== */
.help-search-overlay {
  position: fixed;
  inset: 0;
  background: rgba(21, 33, 58, 0.55);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  z-index: 9999;
  display: none;
  align-items: flex-start;
  justify-content: center;
  padding-top: 120px;
}

.help-search-overlay.open {
  display: flex;
}

.help-search-modal {
  width: 640px;
  max-width: 90vw;
  max-height: 70vh;
  background: var(--brand-v3-paper);
  border: 2.5px solid var(--brand-v3-navy);
  border-radius: 18px;
  box-shadow: var(--brand-v3-shadow-xl);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.help-search-modal-input {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 18px 22px;
  border-bottom: 2px solid var(--brand-v3-navy);
  background: var(--brand-v3-cream);
}

.help-search-modal-input svg {
  width: 20px;
  height: 20px;
  color: var(--brand-v3-navy);
  min-width: 20px;
}

.help-search-modal-input input {
  flex: 1;
  border: none;
  outline: none;
  font-family: var(--brand-v3-sans);
  font-size: 16px;
  font-weight: 500;
  color: var(--brand-v3-ink);
  background: transparent;
}

.help-search-modal-input input::placeholder {
  color: var(--brand-v3-muted);
}

.help-search-results {
  flex: 1;
  overflow-y: auto;
  padding: 10px;
}

.help-search-result-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px 14px;
  border-radius: 10px;
  cursor: pointer;
  transition: background 0.15s ease;
}

.help-search-result-item:hover,
.help-search-result-item.active {
  background: var(--brand-v3-butter);
}

.help-search-result-icon {
  width: 20px;
  height: 20px;
  color: var(--brand-v3-navy);
  min-width: 20px;
  margin-top: 2px;
}

.help-search-result-text h4 {
  font-family: var(--brand-v3-display);
  font-size: 14px;
  font-weight: 700;
  color: var(--brand-v3-navy);
  margin: 0 0 3px;
}

.help-search-result-text p {
  font-family: var(--brand-v3-sans);
  font-size: 13px;
  color: var(--brand-v3-ink-soft);
  margin: 0;
  line-height: 1.45;
}

.help-search-footer {
  padding: 10px 18px;
  border-top: 2px solid var(--brand-v3-navy);
  display: flex;
  gap: 18px;
  font-family: var(--brand-v3-mono);
  font-size: 11px;
  color: var(--brand-v3-muted);
  background: var(--brand-v3-cream-2);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.help-search-footer kbd {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 22px;
  height: 22px;
  padding: 0 6px;
  background: var(--brand-v3-paper);
  border: 1.5px solid var(--brand-v3-navy);
  border-radius: 5px;
  font-family: var(--brand-v3-mono);
  font-size: 11px;
  font-weight: 700;
  color: var(--brand-v3-navy);
  letter-spacing: 0;
  margin-right: 4px;
}

/* ========== 頁尾 ========== */
.help-footer {
  border-top: 2px solid var(--brand-v3-navy);
  padding: 36px 56px;
  max-width: 1440px;
  margin: 0 auto;
  margin-top: 40px;
}

.help-footer-inner {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.help-footer-nav {
  display: flex;
  justify-content: center;
  gap: 12px;
}

.help-footer-nav-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  flex: 1;
  min-width: 0;
  padding: 14px 22px;
  border: 2.5px solid var(--brand-v3-navy);
  border-radius: 14px;
  background: var(--brand-v3-paper);
  font-family: var(--brand-v3-sans);
  font-size: 14px;
  font-weight: 600;
  color: var(--brand-v3-navy);
  text-decoration: none;
  cursor: pointer;
  box-shadow: var(--brand-v3-shadow-sm);
  transition: transform 0.25s cubic-bezier(.2,.8,.2,1), box-shadow 0.25s ease;
}

.help-footer-nav-btn:hover {
  background: var(--brand-v3-butter);
  transform: translate(-2px, -2px);
  box-shadow: var(--brand-v3-shadow-md);
}

.help-footer-nav-btn svg {
  width: 16px;
  height: 16px;
  color: var(--brand-v3-orange);
}

.help-footer-feedback {
  font-family: var(--brand-v3-sans);
  font-size: 14px;
  color: var(--brand-v3-ink-soft);
  text-align: center;
}

.help-footer-feedback a {
  color: var(--brand-v3-orange);
  text-decoration: none;
  font-weight: 700;
  border-bottom: 2px solid var(--brand-v3-orange-soft);
  cursor: pointer;
  transition: border-color 0.2s ease;
}

.help-footer-feedback a:hover {
  border-bottom-color: var(--brand-v3-orange);
}

/* ========== 行動版側邊選單 Overlay ========== */
.help-mobile-sidebar-overlay {
  position: fixed;
  inset: 0;
  background: rgba(21, 33, 58, 0.55);
  backdrop-filter: blur(4px);
  z-index: 9998;
  display: none;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.help-mobile-sidebar-overlay.open {
  display: block;
  opacity: 1;
}

.help-mobile-sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: 320px;
  max-width: 82vw;
  height: 100vh;
  background: var(--brand-v3-cream);
  border-right: 2.5px solid var(--brand-v3-navy);
  z-index: 9999;
  transform: translateX(-100%);
  transition: transform 0.3s cubic-bezier(.2,.8,.2,1);
  overflow-y: auto;
  overscroll-behavior: contain;
  -webkit-overflow-scrolling: touch;
  padding: 24px 0;
  display: flex;
  flex-direction: column;
  box-shadow: var(--brand-v3-shadow-xl);
}

.help-mobile-sidebar.open {
  transform: translateX(0);
}

.help-mobile-sidebar-close {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  padding: 0 16px 16px;
}

.help-mobile-sidebar-close button {
  background: var(--brand-v3-paper);
  border: 2px solid var(--brand-v3-navy);
  border-radius: 10px;
  cursor: pointer;
  padding: 7px;
  color: var(--brand-v3-navy);
  box-shadow: var(--brand-v3-shadow-sm);
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.help-mobile-sidebar-close button:hover {
  box-shadow: var(--brand-v3-shadow-md);
  transform: translate(-1px, -1px);
}

.help-mobile-sidebar-close button svg {
  width: 22px;
  height: 22px;
}

/* =================================================================
   RWD 斷點系統（對齊 v3 skill §17）
   ≤1200: 隱藏右側 TOC
   ≤1080: 漢堡出現、隱藏搜尋/lang switcher、nav 縮 padding
   ≤820:  logo 縮、main padding 縮、h2 縮
   ≤640:  h1/h2 再縮、use-case 單欄、how-it-works 垂直
   ================================================================= */

/* ≤1200：隱藏右側 TOC */
@media (max-width: 1200px) {
  .help-aside {
    display: none;
  }

  .help-main {
    max-width: 100%;
  }
}

/* ≤1080：漢堡出現、搜尋/lang switcher 隱藏、nav padding 縮 */
@media (max-width: 1080px) {
  .help-mobile-menu-btn {
    display: flex;
  }

  .help-nav-search,
  .help-lang-switcher {
    display: none;
  }

  .help-nav-inner {
    padding: 0 20px;
    height: 64px;
  }

  .help-layout {
    padding-top: 64px;
    height: calc(100vh - 64px);
  }

  /* Sidebar 隱藏 - 用 mobile drawer */
  .help-sidebar {
    display: none;
  }
}

/* ≤820：logo 縮、main padding 縮、標題縮 */
@media (max-width: 820px) {
  .help-nav-inner {
    padding: 0 16px;
    height: 60px;
    gap: 12px;
  }

  .help-nav-logo img {
    height: 24px;
    max-width: 160px;
    object-fit: contain;
  }

  .help-nav-title {
    font-size: 13.5px;
  }

  .help-layout {
    padding-top: 60px;
    height: calc(100vh - 60px);
  }

  .help-main {
    padding: 28px 22px 60px;
  }

  .help-article-header {
    margin-bottom: 32px;
    padding-bottom: 22px;
  }

  .help-article-header h1 {
    font-size: clamp(26px, 6vw, 34px);
  }

  .help-content h2 {
    font-size: clamp(22px, 5vw, 28px);
    margin: 44px 0 16px;
    padding-top: 26px;
  }

  .help-content h3 {
    font-size: 18px;
    margin: 30px 0 12px;
  }

  .help-content h4 {
    font-size: 15px;
  }

  .help-content p,
  .help-content ul,
  .help-content ol {
    font-size: 15px;
  }

  /* 表格水平捲動提示 */
  .help-content table {
    font-size: 13px;
  }

  .help-content table th,
  .help-content table td {
    padding: 10px 13px;
  }

  .help-footer {
    padding: 28px 22px;
  }

  .help-footer-nav {
    flex-direction: column;
    gap: 10px;
  }

  /* Section header 標題置中（v3 skill §17.4 標準） */
  .help-faq-group-title {
    justify-content: flex-start;
  }

  /* 搜尋 modal 置中偏上 */
  .help-search-overlay {
    padding-top: 80px;
  }

  .help-search-modal {
    width: 100%;
    margin: 0 16px;
  }
}

/* ≤640：小手機再縮 */
@media (max-width: 640px) {
  .help-nav-divider,
  .help-nav-title {
    display: none;
  }

  .help-main {
    padding: 22px 18px 50px;
  }

  .help-article-header h1 {
    font-size: clamp(22px, 7vw, 30px);
    margin-bottom: 12px;
  }

  .help-article-meta {
    flex-wrap: wrap;
    gap: 12px;
    font-size: 10.5px;
  }

  .help-content h2 {
    font-size: 22px;
    margin: 36px 0 14px;
    padding-top: 22px;
  }

  .help-content h3 {
    font-size: 17px;
  }

  /* use-case grid 單欄 */
  .help-use-case-grid {
    grid-template-columns: 1fr;
    gap: 18px;
  }

  /* how-it-works 垂直 */
  .help-how-it-works {
    flex-direction: column;
    gap: 10px;
  }

  .help-how-step {
    min-width: unset;
  }

  .help-how-step-arrow {
    transform: rotate(90deg);
    align-self: center;
  }

  /* 回頂部按鈕 */
  .help-back-to-top {
    bottom: 18px;
    right: 18px;
    width: 44px;
    height: 44px;
  }

  /* callout padding 縮 */
  .help-callout {
    padding: 14px 14px 14px 20px;
    font-size: 14px;
  }

  /* Step 縮 */
  .help-step-number {
    width: 28px;
    height: 28px;
    min-width: 28px;
    font-size: 13px;
  }

  ol.help-steps > li {
    padding-left: 38px;
  }

  ol.help-steps > li::before {
    width: 26px;
    height: 26px;
    font-size: 12px;
  }

  /* 搜尋 footer 單列 */
  .help-search-footer {
    flex-wrap: wrap;
    gap: 10px;
  }
}

/* ============================================================
   Help nav 整合共用登入態 CTA partial（_landing_nav_cta.html）
   - Desktop：頭像 dropdown + 進入控制台按鈕
   - Mobile：drawer 內 user section（_landing_mobile_cta.html）
   ============================================================ */

/* dropdown 在 help-nav (fixed + z-index:1000) 之上 */
.help-nav-right .landing-user-dropdown {
  z-index: 1100;
}

/* mobile drawer 內 user section padding */
.help-mobile-user-section {
  padding: 16px 20px;
  border-top: 2px solid var(--brand-v3-navy);
}

/* 隱藏與顯示已由 landing.css 的 max-width:1080px 統一處理（與 help mobile breakpoint 對齊） */

/* ========== 列印樣式 ========== */
@media print {
  .help-nav,
  .help-sidebar,
  .help-aside,
  .help-back-to-top,
  .help-progress-bar,
  .help-mobile-menu-btn,
  .help-search-overlay,
  .help-footer-nav {
    display: none !important;
  }

  .help-layout {
    display: block;
    padding-top: 0;
    height: auto;
    overflow: visible;
  }

  .help-main {
    max-width: 100%;
    padding: 0;
    height: auto;
    overflow: visible;
  }

  .help-content a::after {
    content: " (" attr(href) ")";
    font-size: 11px;
    color: var(--brand-v3-muted);
  }

  body.help-page {
    background: white;
    color: black;
  }

  .help-use-case-card,
  .help-whoisitfor-card,
  .help-quickstart-card,
  .help-image-placeholder {
    transform: none !important;
    box-shadow: none !important;
  }
}

/* ========== Section 切換模式（保留原機制） ========== */
.help-content section {
  display: none;
}

.help-content section.active-section {
  display: block;
  animation: helpSectionFadeIn 0.32s cubic-bezier(.2,.8,.2,1);
}

@keyframes helpSectionFadeIn {
  from { opacity: 0; translate: 0 10px; }
  to   { opacity: 1; translate: 0 0; }
}

/* =================================================================
   滾動進場動畫（v3 skill §18 — CSS 3 translate 保留 rotate）
   ================================================================= */

/* Container 層級進場：translateY + opacity */
.help-scroll-animate {
  opacity: 0;
  translate: 0 30px;
  transition: opacity 0.7s cubic-bezier(.2,.8,.2,1),
              translate 0.7s cubic-bezier(.2,.8,.2,1);
}

.help-scroll-animate.in-view {
  opacity: 1;
  translate: 0 0;
}

/* Card 層級 stagger：use-case-grid 進場後子卡依序彈出
   使用 CSS 3 translate/scale 屬性，不動 transform，保留 rotate */
@keyframes helpCardReveal {
  from {
    opacity: 0;
    translate: 0 24px;
    scale: 0.96;
  }
  to {
    opacity: 1;
    translate: 0 0;
    scale: 1;
  }
}

.help-use-case-grid.in-view > .help-use-case-card {
  animation: helpCardReveal 0.55s cubic-bezier(.2,.8,.2,1) both;
}

.help-use-case-grid.in-view > .help-use-case-card:nth-child(1) { animation-delay: 0.05s; }
.help-use-case-grid.in-view > .help-use-case-card:nth-child(2) { animation-delay: 0.14s; }
.help-use-case-grid.in-view > .help-use-case-card:nth-child(3) { animation-delay: 0.23s; }
.help-use-case-grid.in-view > .help-use-case-card:nth-child(4) { animation-delay: 0.32s; }
.help-use-case-grid.in-view > .help-use-case-card:nth-child(5) { animation-delay: 0.41s; }
.help-use-case-grid.in-view > .help-use-case-card:nth-child(6) { animation-delay: 0.50s; }

/* how-it-works 水平 steps 同樣做 stagger（從左進） */
.help-how-it-works.in-view > .help-how-step {
  animation: helpCardReveal 0.5s cubic-bezier(.2,.8,.2,1) both;
}

.help-how-it-works.in-view > .help-how-step:nth-child(1) { animation-delay: 0.05s; }
.help-how-it-works.in-view > .help-how-step:nth-child(3) { animation-delay: 0.18s; }
.help-how-it-works.in-view > .help-how-step:nth-child(5) { animation-delay: 0.31s; }

/* ========== Reduced Motion：全關 ========== */
@media (prefers-reduced-motion: reduce) {
  * {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }

  .help-scroll-animate {
    opacity: 1 !important;
    translate: 0 0 !important;
    transition: none !important;
  }

  .help-use-case-grid > .help-use-case-card,
  .help-how-it-works > .help-how-step {
    animation: none !important;
  }

  /* rotate 也關掉避免暈眩感 */
  .help-whoisitfor-card,
  .help-quickstart-card,
  .help-use-case-card,
  .help-image-placeholder,
  .help-tip-card {
    transform: none !important;
  }
}