/* ==========================================================================
   common.css - DisplayFusion 繁體中文官網 全域性樣式
   編碼: UTF-8
   品牌主色: #0460BA
   ========================================================================== */

:root {
  --color-primary: #0460BA;
  --color-primary-dark: #034a91;
  --color-primary-light: #3b8fdc;
  --color-primary-50: #eaf3fc;
  --color-primary-100: #d4e6f8;
  --color-accent: #00c2ff;
  --color-text: #0f172a;
  --color-text-soft: #475569;
  --color-text-mute: #64748b;
  --color-bg: #ffffff;
  --color-bg-soft: #f6f9fd;
  --color-bg-alt: #eef4fb;
  --color-border: #e2e8f0;
  --color-border-soft: #eef2f7;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, .06);
  --shadow-md: 0 6px 24px rgba(4, 96, 186, .08);
  --shadow-lg: 0 18px 48px rgba(4, 96, 186, .14);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-xl: 28px;
  --container: 1200px;
  --header-h: 72px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
               "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei",
               "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --transition: .25s cubic-bezier(.4,0,.2,1);
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: var(--header-h); }

body {
  margin: 0;
  padding-top: var(--header-h);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

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

a { color: var(--color-primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-primary-dark); }

h1, h2, h3, h4, h5 { margin: 0 0 .6em; line-height: 1.3; color: var(--color-text); font-weight: 700; letter-spacing: .2px; }
p { margin: 0 0 1em; color: var(--color-text-soft); }

.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 24px; }

/* 按鈕基礎 */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 22px; border-radius: 999px; font-weight: 600; font-size: 15px;
  border: 1px solid transparent; cursor: pointer; white-space: nowrap;
  transition: all var(--transition);
}
.btn svg { width: 16px; height: 16px; }
.btn-primary {
  background: linear-gradient(135deg, var(--color-primary) 0%, #0a7bd8 100%);
  color: #fff;
  box-shadow: 0 8px 22px rgba(4, 96, 186, .35);
}
.btn-primary:hover { color: #fff; transform: translateY(-2px); box-shadow: 0 12px 28px rgba(4, 96, 186, .45); }
.btn-ghost {
  background: transparent; color: var(--color-primary);
  border-color: rgba(4, 96, 186, .25);
}
.btn-ghost:hover { background: var(--color-primary-50); border-color: var(--color-primary); }

/* 段落小標 */
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 14px; border-radius: 999px; font-size: 13px; font-weight: 600;
  color: var(--color-primary); background: var(--color-primary-50);
  border: 1px solid rgba(4, 96, 186, .15); letter-spacing: .5px;
}

/* 章節通用 */
section { padding: 96px 0; }
.section-head { text-align: center; max-width: 760px; margin: 0 auto 56px; }
.section-head h2 { font-size: clamp(28px, 3.4vw, 42px); margin-top: 16px; }
.section-head p { font-size: 17px; color: var(--color-text-soft); }

/* 工具：中英文混排間距（手動場景使用） */
.zh-en { word-spacing: .15em; }

/* 捲軸美化 */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-thumb { background: #c8d6e8; border-radius: 999px; }
::-webkit-scrollbar-thumb:hover { background: var(--color-primary-light); }

/* ============ 導航 Header ============ */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(255,255,255,.85);
  -webkit-backdrop-filter: saturate(180%) blur(16px);
  backdrop-filter: saturate(180%) blur(16px);
  border-bottom: 1px solid var(--color-border-soft);
}
.nav {
  height: var(--header-h);
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
}
.nav-brand { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.nav-brand img { width: 38px; height: 38px; object-fit: contain; }
.nav-brand-text { display: flex; flex-direction: column; line-height: 1.1; }
.nav-brand-name { font-size: 18px; font-weight: 700; color: var(--color-text); letter-spacing: .3px; }
.nav-brand-sub { font-size: 11px; color: var(--color-text-mute); margin-top: 2px; font-weight: 500; }

.nav-menu { display: flex; align-items: center; gap: 4px; flex: 1; justify-content: center; }
.nav-menu a {
  position: relative; padding: 8px 14px; font-size: 15px; font-weight: 500;
  color: var(--color-text); border-radius: 8px;
}
.nav-menu a:hover { color: var(--color-primary); background: var(--color-primary-50); }

.nav-drawer { display: contents; }
.nav-actions { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }

/* ============ 導航下拉組（桌面） ============ */
.nav-group { position: relative; }
.nav-group-trigger {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 8px 12px 8px 14px;
  font-size: 15px; font-weight: 500; font-family: inherit;
  color: var(--color-text); background: transparent; border: 0; border-radius: 8px;
  cursor: pointer; line-height: 1.2;
}
.nav-group-trigger:hover { color: var(--color-primary); background: var(--color-primary-50); }
.nav-group-trigger .chev { width: 12px; height: 12px; transition: transform .18s ease; }
.nav-group:hover .nav-group-trigger,
.nav-group.open .nav-group-trigger { color: var(--color-primary); background: var(--color-primary-50); }
.nav-group:hover .nav-group-trigger .chev,
.nav-group.open .nav-group-trigger .chev { transform: rotate(180deg); }
/* 懸浮橋接，滑鼠移到下拉麵板時不會丟失 hover */
.nav-group::after { content: ""; position: absolute; left: 0; right: 0; top: 100%; height: 10px; }

.nav-submenu {
  position: absolute; top: calc(100% + 8px); left: 50%;
  transform: translateX(-50%) translateY(-6px);
  min-width: 168px;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: 12px;
  box-shadow: 0 16px 40px -10px rgba(15,23,42,.16), 0 4px 12px -4px rgba(15,23,42,.08);
  padding: 8px;
  opacity: 0; visibility: hidden; pointer-events: none;
  transition: opacity .15s ease, transform .18s ease, visibility .15s;
  z-index: 50;
}
.nav-group:hover .nav-submenu,
.nav-group.open .nav-submenu,
.nav-group:focus-within .nav-submenu {
  opacity: 1; visibility: visible; pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}
.nav-submenu a {
  display: block;
  padding: 9px 14px;
  font-size: 14px; font-weight: 500; color: var(--color-text);
  border-radius: 8px; white-space: nowrap;
  text-decoration: none;
}
.nav-submenu a:hover { background: var(--color-primary-50); color: var(--color-primary); }

/* 僅普通文字下拉（產品 / 檔案）：hover 時顯示右側箭頭，填充視覺空白 */
.nav-group:not(.lang-switch):not(.apps-switch) .nav-submenu a {
  position: relative;
  display: flex; align-items: center;
  padding-right: 30px;
}
.nav-group:not(.lang-switch):not(.apps-switch) .nav-submenu a::after {
  content: "→";
  position: absolute; right: 12px; top: 50%;
  transform: translateY(-50%) translateX(-6px);
  font-size: 14px; color: var(--color-primary);
  opacity: 0; transition: opacity .15s ease, transform .18s ease;
}
.nav-group:not(.lang-switch):not(.apps-switch) .nav-submenu a:hover::after {
  opacity: 1; transform: translateY(-50%) translateX(0);
}
.nav-group-label { display: none; }

/* 右對齊變體（用於貼近右側的下拉，避免溢位） */
.nav-submenu--right { left: auto; right: 0; transform: translateY(-6px); }
.nav-group:hover .nav-submenu--right,
.nav-group.open .nav-submenu--right,
.nav-group:focus-within .nav-submenu--right { transform: translateY(0); }

/* —— 語言切換器 —— */
.lang-switch { margin-right: 4px; }
.lang-trigger {
  padding: 8px 10px 8px 12px;
  border: 1px solid var(--color-border);
  background: #fff;
  border-radius: 999px;
  gap: 6px;
  font-size: 13px;
}
.lang-trigger .globe { width: 16px; height: 16px; color: var(--color-text-mute); }
.lang-trigger .chev { width: 11px; height: 11px; color: var(--color-text-mute); }
.lang-trigger .lang-current {
  font-weight: 600; color: var(--color-text);
  letter-spacing: .3px;
  min-width: 16px; text-align: center;
}
.lang-switch:hover .lang-trigger,
.lang-switch.open .lang-trigger {
  border-color: rgba(4,96,186,.4);
  background: var(--color-primary-50);
}
.lang-switch:hover .lang-trigger .globe,
.lang-switch.open .lang-trigger .globe,
.lang-switch:hover .lang-trigger .chev,
.lang-switch.open .lang-trigger .chev { color: var(--color-primary); }

.lang-switch .nav-submenu { min-width: 220px; padding: 6px; }
.lang-switch .nav-submenu a {
  display: flex; align-items: center; gap: 12px;
  padding: 9px 12px;
}
.lang-switch .nav-submenu a .lang-code {
  font-family: var(--font-mono);
  font-size: 11px; font-weight: 700; letter-spacing: 1px;
  padding: 3px 7px; border-radius: 5px;
  background: var(--color-primary-50); color: var(--color-primary);
  min-width: 32px; text-align: center;
}
.lang-switch .nav-submenu a .lang-name { font-size: 14px; }
.lang-switch .nav-submenu a.is-current {
  background: var(--color-primary-50);
  color: var(--color-primary);
}
.lang-switch .nav-submenu a.is-current .lang-code {
  background: var(--color-primary); color: #fff;
}

/* —— 同品牌產品切換器 —— */
.apps-switch { margin-right: 2px; }
.apps-trigger {
  width: 38px; height: 38px;
  padding: 0;
  border: 1px solid var(--color-border);
  background: #fff;
  border-radius: 10px;
  display: inline-flex; align-items: center; justify-content: center;
}
.apps-trigger .apps-icon { width: 17px; height: 17px; color: var(--color-text-mute); }
.apps-switch:hover .apps-trigger,
.apps-switch.open .apps-trigger {
  border-color: rgba(4,96,186,.4);
  background: var(--color-primary-50);
}
.apps-switch:hover .apps-trigger .apps-icon,
.apps-switch.open .apps-trigger .apps-icon { color: var(--color-primary); }

.apps-menu { min-width: 244px; padding: 8px; }
.apps-menu a {
  display: flex; align-items: center; gap: 12px;
  padding: 10px 12px;
  border-radius: 10px;
}
.apps-menu a img {
  width: 32px; height: 32px; object-fit: contain;
  flex-shrink: 0;
}
.apps-menu a .apps-text {
  display: flex; flex-direction: column; line-height: 1.25;
  min-width: 0;
}
.apps-menu a .apps-text strong {
  font-size: 14px; font-weight: 600; color: var(--color-text);
}
.apps-menu a .apps-text small {
  font-size: 12px; color: var(--color-text-mute); margin-top: 2px;
}
.apps-menu a:hover .apps-text strong { color: var(--color-primary); }
.apps-menu a.is-current {
  background: var(--color-primary-50);
}
.apps-menu a.is-current .apps-text strong { color: var(--color-primary); }
.apps-menu a.is-current::after {
  content: ""; width: 6px; height: 6px; border-radius: 50%;
  background: var(--color-primary); margin-left: auto; flex-shrink: 0;
}

.nav-toggle {
  display: none; width: 42px; height: 42px; border: 1px solid var(--color-border);
  background: #fff; border-radius: 10px; cursor: pointer; padding: 0;
  align-items: center; justify-content: center;
}
.nav-toggle span {
  display: block; width: 18px; height: 2px; background: var(--color-text);
  position: relative; transition: all var(--transition);
}
.nav-toggle span::before, .nav-toggle span::after {
  content: ""; position: absolute; left: 0; width: 18px; height: 2px;
  background: var(--color-text); transition: all var(--transition);
}
.nav-toggle span::before { top: -6px; }
.nav-toggle span::after { top: 6px; }
.nav-toggle.is-open span { background: transparent; }
.nav-toggle.is-open span::before { top: 0; transform: rotate(45deg); }
.nav-toggle.is-open span::after { top: 0; transform: rotate(-45deg); }

/* ============ 移動端：抽屜式選單 ============ */
@media (max-width: 960px) {
  .nav-toggle { display: inline-flex; position: relative; z-index: 102; }

  /* 半透明遮罩 */
  .nav::before {
    content: "";
    position: fixed; inset: 0; z-index: 100;
    background: rgba(8, 22, 48, .45);
    -webkit-backdrop-filter: blur(6px);
    backdrop-filter: blur(6px);
    opacity: 0; pointer-events: none;
    transition: opacity .35s ease;
  }
  .nav.is-open::before { opacity: 1; pointer-events: auto; }

  /* 抽屜本體：唯一的 fixed 容器，flex 列布局 */
  .nav-drawer {
    display: flex; flex-direction: column;
    position: fixed; top: 0; right: 0;
    width: min(86vw, 360px); height: 100dvh;
    background: linear-gradient(180deg, #ffffff 0%, #f4f9ff 100%);
    box-shadow: -30px 0 80px rgba(4, 96, 186, .18);
    z-index: 101;
    transform: translateX(110%);
    transition: transform .45s cubic-bezier(.6,.05,.2,1);
    padding-top: var(--header-h);
    overflow: hidden;
  }
  .nav.is-open .nav-drawer { transform: translateX(0); }
  /* 裝飾：右上角光暈 */
  .nav-drawer::before {
    content: ""; position: absolute; top: -120px; right: -120px;
    width: 280px; height: 280px; border-radius: 50%;
    background: radial-gradient(circle, rgba(4,96,186,.22), transparent 70%);
    pointer-events: none;
  }

  /* 選單：佔據剩餘空間、可滾動 */
  .nav-menu {
    flex: 1; min-height: 0;
    flex-direction: column; align-items: stretch; gap: 0;
    padding: 28px 0 8px;
    overflow-y: auto; overscroll-behavior: contain;
    counter-reset: menu;
  }
  .nav-menu::before {
    content: "MENU · 導航";
    display: block;
    margin: 0 28px 18px;
    font-family: var(--font-mono); font-size: 11px; font-weight: 700;
    letter-spacing: 3px; color: var(--color-primary);
    padding-bottom: 14px;
    border-bottom: 1px solid rgba(4, 96, 186, .12);
  }

  /* 選單項 — 編輯式大字 + 編號 */
  .nav-menu a {
    position: relative;
    padding: 18px 28px;
    font-size: 22px; font-weight: 600; color: var(--color-text);
    border-radius: 0;
    display: flex; align-items: center; gap: 14px;
    border-bottom: 1px solid rgba(4,96,186,.06);
    opacity: 0; transform: translateX(24px);
    transition: opacity .3s ease, transform .4s ease, color var(--transition), background var(--transition), padding-left var(--transition);
  }
  .nav-menu a::before {
    content: counter(menu, decimal-leading-zero);
    counter-increment: menu;
    font-family: var(--font-mono); font-size: 11px; font-weight: 700;
    letter-spacing: 1.5px; color: var(--color-text-mute);
    min-width: 28px;
  }
  .nav-menu a::after {
    content: "→"; margin-left: auto;
    color: var(--color-primary);
    opacity: 0; transform: translateX(-8px);
    transition: all var(--transition);
  }
  .nav-menu a:hover, .nav-menu a:focus {
    background: rgba(4, 96, 186, .05);
    color: var(--color-primary);
    padding-left: 36px;
  }
  .nav-menu a:hover::after { opacity: 1; transform: translateX(0); }

  /* 下拉組在移動端展平：隱藏觸發按鈕，子項內聯顯示，分組標題作為段標題 */
  .nav-group { display: contents; }
  .nav-group::after { display: none; }
  .nav-group-trigger { display: none; }
  .nav-submenu {
    display: contents;
    position: static; opacity: 1; visibility: visible; pointer-events: auto;
    transform: none; background: transparent; border: 0; box-shadow: none;
    padding: 0; min-width: 0;
  }
  .nav-group-label {
    display: block;
    margin: 18px 28px 4px;
    padding-bottom: 8px;
    font-family: var(--font-mono);
    font-size: 11px; font-weight: 700; letter-spacing: 1.5px;
    color: var(--color-text-mute);
    text-transform: uppercase;
    border-bottom: 1px dashed var(--color-border);
  }
  .nav-submenu a { white-space: normal; }

  /* 語言切換器在移動端抽屜的呈現 */
  .lang-switch { margin: 0; order: -1; }
  .lang-switch .lang-trigger { display: none; }
  .nav-actions .lang-switch { display: contents; }
  .lang-switch .nav-submenu { display: contents; }
  .lang-switch .nav-submenu a {
    display: flex; align-items: center; gap: 14px;
    padding: 14px 28px; font-size: 16px;
    border-radius: 0;
  }
  .lang-switch .nav-submenu a::before,
  .lang-switch .nav-submenu a::after { display: none; }
  .lang-switch .nav-submenu a .lang-code {
    font-size: 11px; min-width: 36px;
  }

  /* 同品牌產品在移動端抽屜的呈現 */
  .apps-switch { margin: 0; order: -2; }
  .apps-switch .apps-trigger { display: none; }
  .nav-actions .apps-switch { display: contents; }
  .apps-switch .apps-menu { display: contents; }
  .apps-switch .apps-menu a {
    display: flex; align-items: center; gap: 14px;
    padding: 12px 28px; border-radius: 0;
  }
  .apps-switch .apps-menu a::before,
  .apps-switch .apps-menu a::after { display: none; }
  .apps-switch .apps-menu a img { width: 30px; height: 30px; }
  .apps-switch .apps-menu a.is-current::after {
    display: block; content: ""; width: 6px; height: 6px;
    border-radius: 50%; background: var(--color-primary);
    margin-left: auto;
  }

  /* 錯峰進入動畫 */
  .nav.is-open .nav-menu a { opacity: 1; transform: translateX(0); }
  .nav.is-open .nav-menu a:nth-child(1) { transition-delay: .18s; }
  .nav.is-open .nav-menu a:nth-child(2) { transition-delay: .26s; }
  .nav.is-open .nav-menu a:nth-child(3) { transition-delay: .34s; }
  .nav.is-open .nav-menu a:nth-child(4) { transition-delay: .42s; }
  .nav.is-open .nav-menu a:nth-child(5) { transition-delay: .50s; }

  /* 底部操作區 */
  .nav-actions {
    flex-shrink: 0;
    flex-direction: column; align-items: stretch;
    padding: 22px 28px calc(22px + env(safe-area-inset-bottom));
    gap: 12px;
    background: linear-gradient(180deg, transparent, rgba(4,96,186,.06));
    border-top: 1px solid rgba(4,96,186,.1);
    position: relative;
  }
  .nav-actions::before {
    content: "立即開始 · GET STARTED";
    display: block; margin-bottom: 4px;
    font-family: var(--font-mono); font-size: 10.5px; font-weight: 700;
    letter-spacing: 2px; color: var(--color-text-mute);
    text-transform: uppercase;
  }
  .nav-actions .btn { width: 100%; padding: 14px 22px; }
  .nav-actions::after {
    content: "support@mail.apsgo.com  ·  400-6322-888";
    display: block; margin-top: 8px;
    font-size: 11.5px; color: var(--color-text-mute);
    text-align: center; letter-spacing: .3px;
  }

  /* 鎖住 body 滾動 */
  body:has(.nav.is-open) { overflow: hidden; }
}

/* ============ 頁尾 Footer ============ */
.site-footer {
  position: relative;
  background: linear-gradient(180deg, #f6f9fd 0%, #eaf3fc 100%);
  border-top: 1px solid var(--color-border-soft);
  overflow: hidden;
}
.site-footer::before {
  content: ""; position: absolute; top: -120px; right: -120px;
  width: 380px; height: 380px; border-radius: 50%;
  background: radial-gradient(circle at center, rgba(4,96,186,.18), transparent 70%);
  pointer-events: none;
}
.footer-inner { padding-top: 64px; padding-bottom: 28px; position: relative; }
.footer-top {
  display: grid; grid-template-columns: 1.3fr 1fr 1fr; gap: 48px;
  padding-bottom: 40px; border-bottom: 1px solid rgba(4,96,186,.12);
}
.footer-brand { display: flex; align-items: center; gap: 14px; margin-bottom: 18px; }
.footer-brand img { width: 44px; height: 44px; }
.footer-brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.footer-brand-name { font-size: 20px; font-weight: 700; color: var(--color-text); }
.footer-brand-sub { font-size: 12px; color: var(--color-text-mute); margin-top: 2px; }
.footer-desc { font-size: 14px; color: var(--color-text-soft); max-width: 380px; }

.footer-col h4 {
  font-size: 13px; font-weight: 700; letter-spacing: 1px;
  text-transform: uppercase; color: var(--color-primary);
  margin-bottom: 18px;
}
.footer-contact { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 12px; }
.footer-contact li { display: flex; align-items: center; gap: 10px; font-size: 14px; color: var(--color-text-soft); }
.footer-contact svg { width: 16px; height: 16px; color: var(--color-primary); flex-shrink: 0; }
.footer-contact a { color: var(--color-text-soft); }
.footer-contact a:hover { color: var(--color-primary); }

.footer-notice {
  font-size: 13px; line-height: 1.75; color: var(--color-text-soft);
  background: rgba(255,255,255,.6); border: 1px solid rgba(4,96,186,.1);
  padding: 16px 18px; border-radius: var(--radius-md);
}
.footer-notice strong { color: var(--color-primary); }
.footer-notice .en { display: block; margin-top: 6px; color: var(--color-text-mute); font-size: 12px; }

.footer-bottom {
  padding-top: 24px; display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: 12px; font-size: 13px; color: var(--color-text-mute);
}
.footer-bottom a { color: var(--color-text-mute); }
.footer-bottom a:hover { color: var(--color-primary); }

@media (max-width: 880px) {
  .footer-inner { padding-top: 48px; padding-bottom: 24px; }
  .footer-top { grid-template-columns: 1fr; gap: 32px; padding-bottom: 32px; }
  .footer-desc { max-width: none; }
  .site-footer::before { width: 260px; height: 260px; top: -100px; right: -100px; opacity: .7; }
  .footer-bottom {
    flex-direction: column; align-items: flex-start; gap: 8px;
    text-align: left; font-size: 12.5px;
  }
}
@media (max-width: 480px) {
  .footer-inner { padding-top: 40px; padding-bottom: 20px; }
  .footer-top { gap: 28px; padding-bottom: 28px; }
  .footer-brand img { width: 38px; height: 38px; }
  .footer-brand-name { font-size: 18px; }
  .footer-col h4 { margin-bottom: 14px; font-size: 12px; }
  .footer-notice { padding: 14px 16px; font-size: 12.5px; }
  .footer-notice .en { font-size: 11.5px; }
  .footer-contact li { font-size: 13.5px; }
}