/* ============================================================
   CarbonEasy 碳易｜共用設計系統 styles.css
   版本：v1.0 | 2026-06-13
   ============================================================ */

/* ------------------------------------------------------------
   1. 字型系統（Font Stack）
   ------------------------------------------------------------ */
:root {
  /* 品牌色 Design Tokens */
  --color-brand:   #144D3A;   /* 主色深綠 */
  --color-brand2:  #2E6B4F;   /* 輔綠 */
  --color-accent:  #4CAF7D;   /* 嫩芽綠 accent */
  --color-mint:    #E8F5EE;   /* 淺薄荷（區塊背景） */
  --color-ink:     #1C1C1E;   /* 墨炭黑（主標題） */
  --color-ink2:    #3A3A3C;   /* 深石墨（次標題） */
  --color-muted:   #6E6E73;   /* 中性灰（說明文字） */
  --color-line:    #C7C7CC;   /* 淺線灰（分隔線） */
  --color-mist:    #F5F5F7;   /* 紙白（大面積背景） */
  --color-white:   #FFFFFF;

  /* 功能色 */
  --color-success: #1E7A48;
  --color-warning: #D97706;
  --color-danger:  #DC2626;
  --color-info:    #2563EB;

  /* 圖表色 */
  --chart-scope1:  #144D3A;
  --chart-scope2:  #4CAF7D;
  --chart-scope3:  #A8D5BC;
  --chart-blue:    #2563EB;
  --chart-amber:   #D97706;
  --chart-purple:  #9333EA;

  /* 字型 */
  --font-zh: "Microsoft JhengHei", "微軟正黑體", "PingFang TC", "Noto Sans TC", sans-serif;
  --font-en: "Inter", "Helvetica Neue", Arial, sans-serif;
  --font-serif: "Georgia", "Times New Roman", serif;

  /* 圓角 */
  --radius-sm:   4px;
  --radius-md:   8px;
  --radius-lg:   12px;
  --radius-full: 9999px;

  /* 陰影 */
  --shadow-sm:   0 1px 3px rgba(0,0,0,0.10);
  --shadow-md:   0 4px 12px rgba(0,0,0,0.15);
  --shadow-xl:   0 20px 60px rgba(0,0,0,0.30);
}

/* 全域基礎 */
*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: var(--font-zh);
  font-size: 16px;
  color: var(--color-ink);
  background: var(--color-white);
  margin: 0;
  padding: 0;
  line-height: 1.6;
}

/* 英文部分 serif 引言 */
blockquote, .quote-text {
  font-family: var(--font-serif);
  font-style: italic;
}

/* 無障礙：focus 樣式 */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* ------------------------------------------------------------
   2. 字型層級（Typography Scale）
   ------------------------------------------------------------ */
.text-display {
  font-size: 52px;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
}
.text-h1   { font-size: 40px; font-weight: 700; line-height: 1.2; }
.text-h2   { font-size: 28px; font-weight: 700; line-height: 1.3; }
.text-h3   { font-size: 20px; font-weight: 600; line-height: 1.4; }
.text-body-lg { font-size: 18px; font-weight: 400; line-height: 1.65; }
.text-body    { font-size: 16px; font-weight: 400; line-height: 1.6;  }
.text-sm      { font-size: 14px; font-weight: 400; line-height: 1.55; }
.text-caption { font-size: 12px; font-weight: 400; line-height: 1.5;  }
.text-kpi     { font-size: 48px; font-weight: 800; letter-spacing: -0.02em; }

/* ------------------------------------------------------------
   3. 按鈕（Button）
   ------------------------------------------------------------ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 22px;
  border-radius: var(--radius-md);
  font-family: var(--font-zh);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  text-decoration: none;
  transition: all 0.18s ease;
  white-space: nowrap;
}
.btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

/* Primary：深綠填色 */
.btn-primary {
  background: var(--color-brand);
  color: #fff;
}
.btn-primary:hover:not(:disabled) {
  background: var(--color-brand2);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

/* Secondary：輔綠填色 */
.btn-secondary {
  background: var(--color-brand2);
  color: #fff;
}
.btn-secondary:hover:not(:disabled) {
  background: var(--color-accent);
}

/* Outline：深綠輪廓 */
.btn-outline {
  background: transparent;
  color: var(--color-brand);
  border: 2px solid var(--color-brand);
}
.btn-outline:hover:not(:disabled) {
  background: var(--color-mint);
}

/* White Outline（深色背景用） */
.btn-outline-white {
  background: transparent;
  color: #fff;
  border: 2px solid rgba(255,255,255,0.75);
}
.btn-outline-white:hover:not(:disabled) {
  background: rgba(255,255,255,0.12);
  border-color: #fff;
}

/* Accent */
.btn-accent {
  background: var(--color-accent);
  color: #fff;
}
.btn-accent:hover:not(:disabled) {
  filter: brightness(1.08);
}

/* Danger */
.btn-danger {
  background: var(--color-danger);
  color: #fff;
}

/* Ghost（文字按鈕） */
.btn-ghost {
  background: transparent;
  color: var(--color-brand2);
}
.btn-ghost:hover:not(:disabled) {
  background: var(--color-mint);
}

/* 尺寸 */
.btn-sm  { padding: 6px 14px; font-size: 13px; }
.btn-lg  { padding: 14px 32px; font-size: 17px; }
.btn-xl  { padding: 16px 40px; font-size: 18px; }

/* Loading 狀態 */
.btn-loading { position: relative; pointer-events: none; }
.btn-loading::after {
  content: '';
  position: absolute;
  right: 10px; top: 50%; transform: translateY(-50%);
  width: 14px; height: 14px;
  border: 2px solid rgba(255,255,255,0.4);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

/* ------------------------------------------------------------
   4. 卡片（Card）
   ------------------------------------------------------------ */
.card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: 24px;
  border: 1px solid rgba(0,0,0,0.06);
  transition: box-shadow 0.18s;
}
.card:hover { box-shadow: var(--shadow-md); }

.card-flat {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-line);
  padding: 24px;
}

/* KPI 數字卡 */
.kpi-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: 24px;
  border: 1px solid rgba(0,0,0,0.06);
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.kpi-card .kpi-label {
  font-size: 13px;
  font-weight: 500;
  color: var(--color-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.kpi-card .kpi-value {
  font-size: 42px;
  font-weight: 800;
  color: var(--color-brand);
  letter-spacing: -0.02em;
  line-height: 1.1;
}
.kpi-card .kpi-unit {
  font-size: 16px;
  font-weight: 500;
  color: var(--color-brand2);
}
.kpi-card .kpi-change {
  font-size: 13px;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 4px;
}
.kpi-card .kpi-change.up   { color: var(--color-danger); }
.kpi-card .kpi-change.down { color: var(--color-success); }

/* Feature Card（前台） */
.feature-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  border: 1px solid rgba(0,0,0,0.07);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: all 0.2s;
}
.feature-card:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.feature-card .feature-icon {
  width: 48px; height: 48px;
  background: var(--color-mint);
  border-radius: var(--radius-md);
  display: flex; align-items: center; justify-content: center;
  color: var(--color-brand);
}

/* Pricing Card */
.pricing-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  border: 2px solid var(--color-line);
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  position: relative;
  transition: all 0.2s;
}
.pricing-card.featured {
  border-color: var(--color-brand);
  box-shadow: 0 8px 32px rgba(20,77,58,0.18);
}
.pricing-card .recommended-badge {
  position: absolute;
  top: -12px; left: 50%;
  transform: translateX(-50%);
  background: var(--color-brand);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  padding: 3px 14px;
  border-radius: var(--radius-full);
  white-space: nowrap;
}

/* Blog / Resource Card */
.blog-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid rgba(0,0,0,0.06);
  box-shadow: var(--shadow-sm);
  transition: all 0.2s;
}
.blog-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.blog-card .blog-thumb {
  width: 100%;
  height: 160px;
  background: var(--color-mint);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-brand2);
}
.blog-card .blog-body { padding: 20px; }

/* ------------------------------------------------------------
   5. Badge / Tag
   ------------------------------------------------------------ */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  font-size: 12px;
  font-weight: 600;
}
.badge-success  { background: #DCFCE7; color: var(--color-success); }
.badge-warning  { background: #FEF3C7; color: var(--color-warning); }
.badge-danger   { background: #FEE2E2; color: var(--color-danger);  }
.badge-info     { background: #DBEAFE; color: var(--color-info);    }
.badge-neutral  { background: #F3F4F6; color: var(--color-muted);   }
.badge-brand    { background: var(--color-mint); color: var(--color-brand); }

/* Status dot */
.badge::before {
  content: '';
  width: 6px; height: 6px;
  border-radius: 50%;
  background: currentColor;
  flex-shrink: 0;
}

/* ------------------------------------------------------------
   6. 表單（Form）
   ------------------------------------------------------------ */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.form-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-ink2);
}
.form-label .required { color: var(--color-danger); margin-left: 3px; }

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 10px 14px;
  border: 1.5px solid var(--color-line);
  border-radius: var(--radius-md);
  font-family: var(--font-zh);
  font-size: 15px;
  color: var(--color-ink);
  background: var(--color-white);
  transition: border-color 0.15s, box-shadow 0.15s;
  outline: none;
}
.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  border-color: var(--color-brand2);
  box-shadow: 0 0 0 3px rgba(46,107,79,0.12);
}
.form-input.error,
.form-select.error,
.form-textarea.error {
  border-color: var(--color-danger);
  box-shadow: 0 0 0 3px rgba(220,38,38,0.10);
}
/* 功能-1：inventory/reports 頁用 classList.add('is-error') 但舊版無定義 */
.form-input.is-error,
.form-select.is-error,
.form-textarea.is-error {
  border-color: var(--color-danger);
  box-shadow: 0 0 0 3px rgba(220,38,38,0.10);
}
.form-error-msg {
  font-size: 12px;
  color: var(--color-danger);
  margin-top: 2px;
}
.form-textarea { resize: vertical; min-height: 100px; }

/* Toggle Switch */
.toggle-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
}
.toggle-input { display: none; }
.toggle-track {
  width: 44px; height: 24px;
  background: var(--color-line);
  border-radius: var(--radius-full);
  position: relative;
  transition: background 0.2s;
  flex-shrink: 0;
}
.toggle-input:checked + .toggle-track { background: var(--color-accent); }
.toggle-track::after {
  content: '';
  position: absolute;
  top: 3px; left: 3px;
  width: 18px; height: 18px;
  background: #fff;
  border-radius: 50%;
  box-shadow: 0 1px 3px rgba(0,0,0,0.2);
  transition: transform 0.2s;
}
.toggle-input:checked + .toggle-track::after { transform: translateX(20px); }
.toggle-label { font-size: 14px; color: var(--color-ink2); }

/* Checkbox */
.checkbox-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
}
.checkbox-wrap input[type="checkbox"] {
  width: 16px; height: 16px;
  accent-color: var(--color-brand);
  cursor: pointer;
}

/* Dropzone */
.dropzone {
  border: 2px dashed var(--color-line);
  border-radius: var(--radius-lg);
  padding: 48px 24px;
  text-align: center;
  color: var(--color-muted);
  cursor: pointer;
  transition: all 0.2s;
  background: var(--color-mist);
}
.dropzone:hover, .dropzone.drag-over {
  border-color: var(--color-brand2);
  background: var(--color-mint);
  color: var(--color-brand);
}

/* Progress Bar */
.progress-bar-wrap {
  height: 8px;
  background: var(--color-line);
  border-radius: var(--radius-full);
  overflow: hidden;
}
.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--color-brand), var(--color-accent));
  border-radius: var(--radius-full);
  transition: width 0.4s ease;
}

/* ------------------------------------------------------------
   7. 表格（Data Table）
   ------------------------------------------------------------ */
.data-table-wrap {
  width: 100%;
  overflow-x: auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-line);
}
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}
.data-table thead {
  background: var(--color-mist);
}
.data-table th {
  padding: 12px 16px;
  text-align: left;
  font-size: 12px;
  font-weight: 600;
  color: var(--color-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  border-bottom: 1px solid var(--color-line);
  white-space: nowrap;
}
.data-table td {
  padding: 13px 16px;
  border-bottom: 1px solid rgba(0,0,0,0.05);
  color: var(--color-ink2);
  vertical-align: middle;
}
.data-table tbody tr:last-child td { border-bottom: none; }
.data-table tbody tr:hover { background: var(--color-mist); }

/* ------------------------------------------------------------
   8. Toast 通知
   ------------------------------------------------------------ */
#toast-container {
  position: fixed;
  bottom: 24px; right: 24px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 10px;
  pointer-events: none;
}
.toast {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 14px 18px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  font-size: 14px;
  font-weight: 500;
  color: var(--color-white);
  max-width: 340px;
  pointer-events: all;
  animation: toastIn 0.3s ease forwards;
  line-height: 1.4;
}
.toast.success { background: var(--color-success); }
.toast.warning { background: var(--color-warning); }
.toast.error   { background: var(--color-danger);  }
.toast.info    { background: var(--color-info);    }
.toast-icon { font-size: 16px; flex-shrink: 0; margin-top: 1px; }
.toast-out { animation: toastOut 0.3s ease forwards; }

@keyframes toastIn {
  from { opacity: 0; transform: translateX(40px); }
  to   { opacity: 1; transform: translateX(0); }
}
@keyframes toastOut {
  from { opacity: 1; transform: translateX(0); }
  to   { opacity: 0; transform: translateX(40px); }
}

/* ------------------------------------------------------------
   9. Modal
   ------------------------------------------------------------ */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.50);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  opacity: 0;
  transition: opacity 0.2s;
}
.modal-overlay.open { opacity: 1; }
.modal-box {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  padding: 32px;
  width: 100%;
  max-width: 520px;
  max-height: 90vh;
  overflow-y: auto;
  transform: translateY(20px);
  transition: transform 0.2s;
}
.modal-overlay.open .modal-box { transform: translateY(0); }
.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}
.modal-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-ink);
}
.modal-close {
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  color: var(--color-muted);
  font-size: 20px;
  line-height: 1;
  border-radius: var(--radius-sm);
  transition: color 0.15s;
}
.modal-close:hover { color: var(--color-ink); }
.modal-footer {
  display: flex;
  gap: 10px;
  justify-content: flex-end;
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px solid var(--color-line);
}

/* ------------------------------------------------------------
   10. 前台 Navbar（Sticky Top）
   ------------------------------------------------------------ */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 900;
  background: var(--color-white);
  border-bottom: 1px solid rgba(0,0,0,0.07);
  backdrop-filter: blur(8px);
}
.site-nav .nav-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  height: 68px;
  display: flex;
  align-items: center;
  gap: 0;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  flex-shrink: 0;
  margin-right: 32px;
}
.nav-logo .logo-mark {
  width: 36px; height: 36px;
  background: var(--color-brand);
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
}
.nav-logo .logo-text-zh {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-brand);
  line-height: 1.1;
}
.nav-logo .logo-text-en {
  font-size: 11px;
  font-weight: 500;
  color: var(--color-brand2);
  letter-spacing: 0.05em;
  line-height: 1;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
  margin: 0;
  padding: 0;
  flex: 1;
}
.nav-links > li { position: relative; }
.nav-links > li > a,
.nav-links > li > button {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 8px 14px;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-ink2);
  text-decoration: none;
  border: none;
  background: none;
  cursor: pointer;
  border-radius: var(--radius-md);
  transition: all 0.15s;
  white-space: nowrap;
}
.nav-links > li > a:hover,
.nav-links > li > button:hover {
  color: var(--color-brand);
  background: var(--color-mint);
}
.nav-links > li > a.active,
.nav-links > li > button.active {
  color: var(--color-brand);
  font-weight: 600;
}

/* Mega Menu */
.mega-menu {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md), 0 0 0 1px rgba(0,0,0,0.06);
  min-width: 280px;
  padding: 12px;
  display: none;
  z-index: 901;
}
/* 設計-5：:hover（滑鼠）與 .open（鍵盤/觸控）皆顯示 */
.nav-links > li:hover .mega-menu,
.nav-links > li .mega-menu.open { display: block; }
.mega-menu a {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 10px 12px;
  border-radius: var(--radius-md);
  text-decoration: none;
  color: var(--color-ink2);
  transition: all 0.15s;
}
.mega-menu a:hover {
  background: var(--color-mint);
  color: var(--color-brand);
}
.mega-menu .menu-icon {
  width: 36px; height: 36px;
  background: var(--color-mint);
  border-radius: var(--radius-md);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  font-size: 18px;
}
.mega-menu .menu-label { font-size: 14px; font-weight: 600; margin-bottom: 2px; }
.mega-menu .menu-desc  { font-size: 12px; color: var(--color-muted); }

/* Nav CTA 群 */
.nav-cta {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-left: 16px;
  flex-shrink: 0;
}

/* 漢堡選單按鈕（行動版） */
.nav-hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
  color: var(--color-ink);
  margin-left: auto;
}

/* 行動版導覽 */
.mobile-menu {
  display: none;
  background: var(--color-white);
  border-top: 1px solid var(--color-line);
  padding: 16px 24px 24px;
  flex-direction: column;
  gap: 4px;
}
.mobile-menu.open { display: flex; }
.mobile-menu a {
  display: block;
  padding: 10px 12px;
  color: var(--color-ink2);
  text-decoration: none;
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 500;
  transition: all 0.15s;
}
.mobile-menu a:hover { background: var(--color-mint); color: var(--color-brand); }

/* ------------------------------------------------------------
   11. 前台 Footer
   ------------------------------------------------------------ */
.site-footer {
  background: var(--color-ink);
  color: rgba(255,255,255,0.75);
  padding: 64px 24px 32px;
}
.site-footer .footer-inner {
  max-width: 1280px;
  margin: 0 auto;
}
.site-footer .footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255,255,255,0.12);
  margin-bottom: 32px;
}
.site-footer .footer-brand .logo-text-zh { color: #fff; font-size: 20px; }
.site-footer .footer-brand .logo-text-en { color: rgba(255,255,255,0.6); }
.site-footer .footer-tagline {
  font-size: 14px;
  color: rgba(255,255,255,0.68);
  margin-top: 12px;
  line-height: 1.6;
  max-width: 260px;
}
.site-footer .footer-col-title {
  font-size: 12px;
  font-weight: 700;
  color: rgba(255,255,255,0.68);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 14px;
}
.site-footer .footer-links {
  list-style: none;
  padding: 0; margin: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.site-footer .footer-links a {
  color: rgba(255,255,255,0.7);
  text-decoration: none;
  font-size: 14px;
  transition: color 0.15s;
}
.site-footer .footer-links a:hover { color: var(--color-accent); }
.site-footer .footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13px;
  color: rgba(255,255,255,0.68);
  flex-wrap: wrap;
  gap: 12px;
}
.site-footer .social-links {
  display: flex; gap: 12px;
}
.site-footer .social-links a {
  color: rgba(255,255,255,0.68);
  font-size: 18px;
  text-decoration: none;
  transition: color 0.15s;
}
.site-footer .social-links a:hover { color: var(--color-accent); }

/* ------------------------------------------------------------
   12. 後台 Sidebar
   ------------------------------------------------------------ */
.app-layout {
  display: flex;
  min-height: 100vh;
  background: var(--color-mist);
}

.app-sidebar {
  width: 240px;
  flex-shrink: 0;
  background: var(--color-brand);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0; left: 0; bottom: 0;
  z-index: 500;
  overflow-y: auto;
  transition: width 0.2s, transform 0.25s ease;
}
.sidebar-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 20px 16px;
  border-bottom: 1px solid rgba(255,255,255,0.10);
  text-decoration: none;
}
.sidebar-logo .logo-mark {
  width: 34px; height: 34px;
  background: rgba(255,255,255,0.20);
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.sidebar-logo .logo-text-zh { color: #fff; font-size: 16px; font-weight: 700; line-height: 1.1; }
.sidebar-logo .logo-text-en { color: rgba(255,255,255,0.65); font-size: 10px; font-weight: 500; letter-spacing: 0.06em; }

.sidebar-nav {
  padding: 16px 8px;
  flex: 1;
}
.sidebar-section-label {
  font-size: 10px;
  font-weight: 700;
  color: rgba(255,255,255,0.68);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  padding: 8px 12px 4px;
  margin-top: 8px;
}
.sidebar-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: var(--radius-md);
  color: rgba(255,255,255,0.78);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  transition: all 0.15s;
  margin-bottom: 2px;
}
.sidebar-link:hover {
  background: rgba(255,255,255,0.12);
  color: #fff;
}
.sidebar-link.active {
  background: rgba(255,255,255,0.18);
  color: #fff;
  font-weight: 600;
}
.sidebar-link .sidebar-icon {
  font-size: 17px;
  flex-shrink: 0;
  width: 20px;
  text-align: center;
}
.sidebar-footer {
  padding: 16px;
  border-top: 1px solid rgba(255,255,255,0.10);
  font-size: 12px;
  color: rgba(255,255,255,0.68);
}

/* ------------------------------------------------------------
   13. 後台 Topbar
   ------------------------------------------------------------ */
.app-main {
  margin-left: 240px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.app-topbar {
  position: sticky;
  top: 0;
  z-index: 400;
  background: var(--color-white);
  border-bottom: 1px solid var(--color-line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  height: 64px;
  gap: 16px;
}
.topbar-left {
  display: flex;
  align-items: center;
  gap: 12px;
}
.topbar-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-ink);
}
.topbar-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* 年度選擇器 */
.year-select {
  padding: 7px 32px 7px 12px;
  border: 1.5px solid var(--color-line);
  border-radius: var(--radius-md);
  font-size: 14px;
  font-family: var(--font-zh);
  font-weight: 600;
  color: var(--color-ink2);
  background: var(--color-white);
  cursor: pointer;
  outline: none;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%236E6E73' d='M6 8L0 0h12z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
}
.year-select:focus { border-color: var(--color-brand2); }

/* 用戶頭像 */
.user-avatar {
  width: 36px; height: 36px;
  background: var(--color-brand2);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: #fff;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  flex-shrink: 0;
}

/* 匯出下拉 */
.export-dropdown { position: relative; }
.export-menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md), 0 0 0 1px rgba(0,0,0,0.06);
  min-width: 180px;
  overflow: hidden;
  display: none;
  z-index: 999;
}
.export-menu.open { display: block; }
.export-menu a, .export-menu button {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 11px 16px;
  font-size: 14px;
  color: var(--color-ink2);
  text-decoration: none;
  background: none;
  border: none;
  width: 100%;
  text-align: left;
  cursor: pointer;
  font-family: var(--font-zh);
  transition: background 0.13s;
}
.export-menu a:hover, .export-menu button:hover {
  background: var(--color-mint);
  color: var(--color-brand);
}

/* App 主內容區 */
.app-content {
  padding: 28px 28px 48px;
  flex: 1;
}

/* 麵包屑 */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--color-muted);
  margin-bottom: 20px;
}
.breadcrumb a { color: var(--color-brand2); text-decoration: none; }
.breadcrumb a:hover { text-decoration: underline; }
.breadcrumb .sep { color: var(--color-line); }

/* ------------------------------------------------------------
   14. Tab Bar
   ------------------------------------------------------------ */
.tab-bar {
  display: flex;
  gap: 2px;
  border-bottom: 2px solid var(--color-line);
  margin-bottom: 24px;
}
.tab-btn {
  padding: 10px 20px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-muted);
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  cursor: pointer;
  font-family: var(--font-zh);
  transition: all 0.15s;
  white-space: nowrap;
}
.tab-btn:hover { color: var(--color-brand); }
.tab-btn.active {
  color: var(--color-brand);
  border-bottom-color: var(--color-brand);
  font-weight: 600;
}
.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* ------------------------------------------------------------
   15. Accordion / FAQ
   ------------------------------------------------------------ */
.accordion-item {
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  margin-bottom: 8px;
  overflow: hidden;
}
.accordion-trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-ink);
  background: none;
  border: none;
  cursor: pointer;
  font-family: var(--font-zh);
  text-align: left;
  transition: background 0.13s;
}
.accordion-trigger:hover { background: var(--color-mist); }
.accordion-icon {
  font-size: 20px;
  color: var(--color-brand);
  transition: transform 0.2s;
  flex-shrink: 0;
}
.accordion-item.open .accordion-icon { transform: rotate(45deg); }
.accordion-body {
  display: none;
  padding: 4px 20px 20px;
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.65;
}
.accordion-item.open .accordion-body { display: block; }

/* ------------------------------------------------------------
   16. Step Indicator（Wizard 步驟條）
   ------------------------------------------------------------ */
.step-indicator {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  margin-bottom: 32px;
}
.step-item {
  display: flex;
  align-items: center;
  gap: 0;
}
.step-circle {
  width: 36px; height: 36px;
  border-radius: 50%;
  background: var(--color-line);
  color: var(--color-muted);
  display: flex; align-items: center; justify-content: center;
  font-size: 14px;
  font-weight: 700;
  flex-shrink: 0;
  transition: all 0.2s;
}
.step-item.done   .step-circle { background: var(--color-success); color: #fff; }
.step-item.active .step-circle { background: var(--color-brand);   color: #fff; box-shadow: 0 0 0 4px var(--color-mint); }
.step-label {
  font-size: 13px;
  font-weight: 500;
  color: var(--color-muted);
  margin-left: 8px;
  white-space: nowrap;
}
.step-item.active .step-label { color: var(--color-brand); font-weight: 600; }
.step-item.done   .step-label { color: var(--color-success); }
.step-connector {
  width: 48px; height: 2px;
  background: var(--color-line);
  margin: 0 4px;
  flex-shrink: 0;
}
.step-item.done + .step-connector { background: var(--color-success); }

/* ------------------------------------------------------------
   17. Trust Strip（Logo 帶無限滾動）
   ------------------------------------------------------------ */
.trust-strip {
  overflow: hidden;
  width: 100%;
}
.trust-track {
  display: flex;
  align-items: center;
  gap: 48px;
  animation: scrollLeft 28s linear infinite;
  width: max-content;
}
.trust-strip:hover .trust-track { animation-play-state: paused; }
.trust-logo {
  font-size: 15px;
  font-weight: 700;
  color: var(--color-line);
  white-space: nowrap;
  letter-spacing: 0.04em;
  filter: grayscale(1);
  opacity: 0.55;
  transition: all 0.2s;
}
.trust-logo:hover { filter: none; opacity: 1; color: var(--color-brand2); }

@keyframes scrollLeft {
  0%   { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

/* ------------------------------------------------------------
   18. Carousel（見證）
   ------------------------------------------------------------ */
.carousel-wrap {
  position: relative;
  overflow: hidden;
}
.carousel-track {
  display: flex;
  transition: transform 0.4s cubic-bezier(.4,0,.2,1);
}
.carousel-slide {
  min-width: 100%;
}
.carousel-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-top: 24px;
}
.carousel-btn {
  width: 40px; height: 40px;
  border-radius: 50%;
  background: var(--color-white);
  border: 1.5px solid var(--color-line);
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  font-size: 18px;
  color: var(--color-ink2);
  transition: all 0.15s;
}
.carousel-btn:hover {
  background: var(--color-brand);
  border-color: var(--color-brand);
  color: #fff;
}
.carousel-dots {
  display: flex; gap: 8px;
}
.carousel-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--color-line);
  transition: all 0.15s;
  cursor: pointer;
}
.carousel-dot.active {
  background: var(--color-brand);
  transform: scale(1.3);
}

/* ------------------------------------------------------------
   19. Alert Banner
   ------------------------------------------------------------ */
.alert {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 16px;
  border-radius: var(--radius-md);
  font-size: 14px;
  line-height: 1.5;
}
.alert-icon { font-size: 18px; flex-shrink: 0; margin-top: 1px; }
.alert-success { background: #DCFCE7; color: var(--color-success); border: 1px solid #BBF7D0; }
.alert-warning { background: #FEF3C7; color: #92400E;              border: 1px solid #FDE68A; }
.alert-danger  { background: #FEE2E2; color: var(--color-danger);  border: 1px solid #FECACA; }
.alert-info    { background: #DBEAFE; color: #1E40AF;              border: 1px solid #BFDBFE; }

/* ------------------------------------------------------------
   20. Pagination
   ------------------------------------------------------------ */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  margin-top: 32px;
}
.page-btn {
  width: 36px; height: 36px;
  border-radius: var(--radius-md);
  border: 1.5px solid var(--color-line);
  background: var(--color-white);
  font-size: 14px;
  font-weight: 500;
  color: var(--color-ink2);
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: all 0.13s;
  font-family: var(--font-zh);
}
.page-btn:hover { background: var(--color-mint); border-color: var(--color-brand2); color: var(--color-brand); }
.page-btn.active { background: var(--color-brand); border-color: var(--color-brand); color: #fff; }
.page-btn:disabled { opacity: 0.4; cursor: not-allowed; }

/* ------------------------------------------------------------
   21. Skeleton Loader
   ------------------------------------------------------------ */
.skeleton {
  background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-md);
}
@keyframes shimmer {
  0%   { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ------------------------------------------------------------
   22. Loading Spinner
   ------------------------------------------------------------ */
.spinner {
  width: 20px; height: 20px;
  border: 2.5px solid rgba(255,255,255,0.35);
  border-top-color: currentColor;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  display: inline-block;
}
.spinner-brand {
  border-color: rgba(20,77,58,0.2);
  border-top-color: var(--color-brand);
  color: var(--color-brand);
}
@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ------------------------------------------------------------
   23. Section 共用 utilities
   ------------------------------------------------------------ */
.section-label {
  font-size: 13px;
  font-weight: 700;
  color: var(--color-brand2);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 8px;
}
.section-title {
  font-size: 32px;
  font-weight: 700;
  color: var(--color-ink);
  line-height: 1.25;
  margin: 0 0 12px;
}
.section-desc {
  font-size: 17px;
  color: var(--color-muted);
  line-height: 1.65;
  max-width: 560px;
}
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}
.section-pad { padding: 80px 0; }
.section-pad-sm { padding: 48px 0; }

/* 色帶 Divider */
.color-strip {
  height: 4px;
  background: linear-gradient(90deg, var(--color-brand), var(--color-accent));
}

/* Quick Action 按鈕列（Dashboard 底部） */
.quick-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}
.quick-action-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  background: var(--color-white);
  border: 1.5px solid var(--color-line);
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 600;
  color: var(--color-brand);
  cursor: pointer;
  font-family: var(--font-zh);
  text-decoration: none;
  transition: all 0.15s;
}
.quick-action-btn:hover {
  background: var(--color-mint);
  border-color: var(--color-brand2);
  box-shadow: var(--shadow-sm);
}

/* Chart 容器 */
.chart-container {
  position: relative;
  width: 100%;
}

/* ------------------------------------------------------------
   24. RWD Breakpoints
   ------------------------------------------------------------ */
@media (max-width: 1024px) {
  .site-footer .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
  /* 設計-4：後台 .app-content 內的 inline multi-column grid 在平板降為單欄，
     解決 KPI/圖表在 769px–1024px 區間嚴重擠壓問題 */
  .app-content [style*="grid-template-columns"] {
    grid-template-columns: 1fr !important;
  }
}
@media (max-width: 768px) {
  .nav-links, .nav-cta { display: none; }
  .nav-hamburger { display: flex; align-items: center; justify-content: center; }
  .site-footer .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .app-sidebar { transform: translateX(-100%); }
  .app-sidebar.open { transform: translateX(0); }
  .app-main { margin-left: 0; }
  .text-display { font-size: 36px; }
  .text-h1 { font-size: 28px; }
  .section-pad { padding: 48px 0; }
  .kpi-card .kpi-value { font-size: 32px; }
}

/* ------------------------------------------------------------
   25. Print CSS（報告書列印）
   ------------------------------------------------------------ */
@media print {
  .app-sidebar, .app-topbar, .site-nav, .site-footer,
  .quick-actions, .export-dropdown, .no-print,
  .demo-banner { display: none !important; }
  .app-main { margin-left: 0 !important; }
  .app-content { padding: 0 !important; }
  body { font-size: 12px; color: #000; background: #fff; }
  .card, .kpi-card { box-shadow: none; border: 1px solid #ccc; }
  @page { margin: 20mm; }
}

/* ------------------------------------------------------------
   26. DEMO 示意橫幅
   ------------------------------------------------------------ */
.demo-banner {
  position: relative;
  z-index: 9998;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 7px 48px 7px 16px;
  background: #92400E;
  color: #FEF3C7;
  font-family: var(--font-zh);
  font-size: 12px;
  font-weight: 500;
  line-height: 1.5;
  text-align: center;
}
.demo-banner-text {
  flex: 1;
  text-align: center;
}
.demo-banner-close {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: #FEF3C7;
  font-size: 18px;
  line-height: 1;
  cursor: pointer;
  padding: 2px 6px;
  border-radius: 4px;
  opacity: 0.8;
  transition: opacity 0.15s;
  font-family: Arial, sans-serif;
}
.demo-banner-close:hover { opacity: 1; }

/* ------------------------------------------------------------
   27-B. 語言切換器（.lang-switch）
   pill 樣式，與品牌色協調；當前語言品牌綠底白字，另一語言灰字可 hover
   ------------------------------------------------------------ */
.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 0;
  background: var(--color-mist);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-full);
  padding: 3px 4px;
  font-size: 12px;
  font-weight: 600;
  font-family: var(--font-zh);
  white-space: nowrap;
  flex-shrink: 0;
  line-height: 1;
}

/* 選項（可點 <a> 與不可點 <span> 共用基礎） */
.lang-switch-opt {
  display: inline-flex;
  align-items: center;
  padding: 4px 9px;
  border-radius: var(--radius-full);
  text-decoration: none;
  color: var(--color-muted);
  cursor: pointer;
  transition: color 0.15s, background 0.15s;
  line-height: 1.3;
  user-select: none;
}
a.lang-switch-opt:hover {
  color: var(--color-brand);
  background: var(--color-mint);
}

/* 當前語言：品牌綠底白字，不可點 */
.lang-switch-active {
  background: var(--color-brand);
  color: #fff !important;
  cursor: default;
}

/* 分隔符 */
.lang-switch-sep {
  color: var(--color-line);
  font-size: 11px;
  padding: 0 1px;
  user-select: none;
}

/* Fixed fallback（找不到 .nav-cta / .topbar-right 時） */
.lang-switch-fixed {
  position: fixed;
  top: 52px;   /* DEMO 橫幅約 36px 高，留 16px 間距 */
  right: 16px;
  z-index: 9000;
  box-shadow: var(--shadow-md);
}

/* 前台 navbar 內：讓切換器在 CTA 最左側，與按鈕之間留間距 */
.nav-cta .lang-switch {
  margin-right: 4px;
}

/* 後台 topbar 內：讓切換器在最左側，與其他控制項之間留間距 */
.topbar-right .lang-switch {
  margin-right: 4px;
}

/* print 不印語言切換器 */
@media print {
  .lang-switch { display: none !important; }
}

/* ------------------------------------------------------------
   28. 設計-6：比較表「不支援」符號對比度修正
   pricing.html 比較表的 ✕ 原使用 --color-line（#C7C7CC，對比 1.6:1，不足）。
   .compare-no：供比較表 ✕ span 套用，改用 --color-muted（#6E6E73，對比 4.7:1）。
   ------------------------------------------------------------ */
.compare-no {
  color: var(--color-muted) !important;
  font-weight: 700;
}

/* ------------------------------------------------------------
   27. Mobile inline-grid 覆蓋（設計-7 RWD 補丁）
   強制讓 inline style 寫死的多欄 grid 在手機回到單欄
   ------------------------------------------------------------ */
@media (max-width: 768px) {
  [style*="grid-template-columns"] {
    grid-template-columns: 1fr !important;
  }
}

/* ------------------------------------------------------------
   29. 設計-4：前台平板 RWD（769px–1024px）
   body:not(.app) 限定前台，讓三欄/四欄 inline grid 降為兩欄
   後台 .app 內已由規則 24 的 .app-content 規則處理，不重複覆蓋
   ------------------------------------------------------------ */
@media (min-width: 769px) and (max-width: 1024px) {
  body:not(.app) [style*="repeat(3,1fr)"],
  body:not(.app) [style*="repeat(3, 1fr)"],
  body:not(.app) [style*="repeat(4,1fr)"],
  body:not(.app) [style*="repeat(4, 1fr)"] {
    grid-template-columns: repeat(2, 1fr) !important;
  }
}