/* 電小二 Volt Buddy 官網樣式
   設計稿的顏色與字級集中在 :root，之後要改品牌色只改這裡。 */
:root {
  --navy: #091A2E;
  --navy-2: #10253D;
  --navy-line: #22364C;
  --mint: #2EED85;
  --lime: #C7FF36;
  --bg: #F5F7F6;
  --card: #FFFFFF;
  --line: #DDE4EA;
  --ink: #0F1B2A;
  --ink-2: #33424F;
  --muted: #4B5A6A;
  --on-navy: #C9D4DF;
  --on-navy-2: #9FB0C2;
  --link: #0B6B3A;
  --radius: 24px;
  --wrap: 1200px;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: 'Noto Sans TC', system-ui, -apple-system, 'PingFang TC', 'Microsoft JhengHei', sans-serif;
  font-size: 17px;
  line-height: 1.6;
}
img { max-width: 100%; display: block; }
a { color: var(--link); }
a:hover { color: #064E2A; }
:focus-visible { outline: 3px solid var(--lime); outline-offset: 3px; border-radius: 6px; }
h1, h2, h3, p { margin: 0; }
.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 24px; }
.skip { position: absolute; left: -9999px; }
.skip:focus { left: 16px; top: 16px; z-index: 100; background: var(--lime); color: var(--navy); padding: 10px 16px; border-radius: 10px; }

/* ---------- 頁首 ---------- */
.site-header { background: var(--navy); position: sticky; top: 0; z-index: 50; }
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding-top: 12px; padding-bottom: 12px; }
.brand img { height: 48px; width: auto; }
.nav { display: flex; align-items: center; gap: 4px 26px; }
.nav a.nav-link { white-space: nowrap; color: var(--on-navy); text-decoration: none; font-size: 16px; padding: 10px 0; border-bottom: 2px solid transparent; }
.nav a.nav-link:hover { color: #FFFFFF; }
.nav a.nav-link[aria-current="page"] { color: #FFFFFF; font-weight: 700; border-bottom-color: var(--mint); }
.nav-actions { display: flex; gap: 10px; }
.menu-toggle { display: none; width: 48px; height: 48px; border-radius: 12px; border: 1px solid #3C4E63; background: transparent; cursor: pointer; align-items: center; justify-content: center; }

/* ---------- 按鈕 ---------- */
.btn { white-space: nowrap; display: inline-flex; align-items: center; justify-content: center; min-height: 48px; text-decoration: none; font-weight: 700; font-size: 17px; padding: 12px 28px; border-radius: 999px; border: 1px solid transparent; text-align: center; }
.btn-sm { min-height: 44px; font-size: 15px; padding: 9px 20px; }
.btn-mint { background: var(--mint); color: var(--navy); }
.btn-mint:hover { background: #5CF3A0; color: var(--navy); }
.btn-ghost-light { color: #FFFFFF; border-color: #5B6B7C; }
.btn-ghost-light:hover { color: #FFFFFF; border-color: #FFFFFF; }
.btn-ghost { color: var(--navy); border-color: var(--navy); }
.btn-ghost:hover { color: var(--navy); background: #EEF2F5; }
.btn-navy { background: var(--navy); color: #FFFFFF; }
.btn-navy:hover { background: #17304D; color: #FFFFFF; }
.btn-row { display: flex; flex-wrap: wrap; gap: 12px; }

/* ---------- 共用區塊 ---------- */
.section { padding: 88px 0; }
.section-white { background: var(--card); }
.eyebrow { color: var(--link); font-weight: 700; letter-spacing: 0.12em; font-size: 15px; }
.eyebrow-light { color: var(--lime); }
.h2 { font-size: 38px; line-height: 1.3; font-weight: 900; }
.lead { font-size: 18px; color: var(--ink-2); }
.center { text-align: center; }
.stack { display: flex; flex-direction: column; gap: 14px; }
.stack-lg { display: flex; flex-direction: column; gap: 36px; }
.grid { display: grid; gap: 22px; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 30px; }
.card-soft { background: var(--bg); border-radius: 20px; padding: 28px; }
.card h3 { font-size: 21px; font-weight: 700; }
.muted { color: var(--muted); }
.pill { display: inline-block; background: var(--lime); color: var(--navy); font-weight: 900; padding: 6px 16px; border-radius: 999px; }
.split { display: flex; flex-wrap: wrap; gap: 48px; align-items: center; }
.split > * { flex: 1 1 420px; min-width: 0; }
.photo { width: 100%; object-fit: cover; border-radius: 28px; }

/* ---------- 主視覺 ---------- */
.hero { background: var(--navy); color: #FFFFFF; padding: 64px 0 88px; }
.hero h1 { font-size: 60px; line-height: 1.15; font-weight: 900; }
.hero .accent { color: var(--mint); }
.hero p.lead { color: var(--on-navy); font-size: 19px; max-width: 540px; }
.hero .note { color: var(--on-navy-2); font-size: 14px; }
.hero .photo { height: 520px; object-position: 50% 45%; }
.page-hero { background: var(--navy); color: #FFFFFF; padding: 56px 0 64px; }
.page-hero h1 { font-size: 46px; line-height: 1.25; font-weight: 900; }
.page-hero p.lead { color: var(--on-navy); max-width: 640px; }
.page-hero .photo { height: 340px; }

/* ---------- 圖示方塊 ---------- */
.icon-box { width: 56px; height: 56px; border-radius: 16px; background: var(--navy); display: flex; align-items: center; justify-content: center; }

/* ---------- 優惠卡 ---------- */
.promo { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; display: flex; flex-direction: column; }
.promo-top { background: var(--navy); padding: 22px 26px; display: flex; flex-direction: column; gap: 6px; }
.promo-badge { align-self: flex-start; background: var(--lime); color: var(--navy); font-size: 13px; font-weight: 900; padding: 3px 12px; border-radius: 999px; }
.promo-badge.ending { background: #FFD166; }
.promo-price { color: var(--mint); font-size: 30px; font-weight: 900; line-height: 1.2; }
.promo-save { color: var(--on-navy); font-size: 15px; }
.promo-body { padding: 22px 26px 26px; display: flex; flex-direction: column; gap: 8px; flex: 1; }
.promo-body h3 { font-size: 21px; font-weight: 700; }
.promo-period { margin-top: auto; padding-top: 12px; border-top: 1px solid #E9EEF2; color: var(--muted); font-size: 15px; }
.promo-mini { text-decoration: none; color: var(--ink); background: var(--card); border: 1px solid var(--line); border-left: 6px solid var(--mint); border-radius: 20px; padding: 20px 24px; display: flex; flex-direction: column; gap: 4px; }
.promo-mini:hover { color: var(--ink); border-color: var(--mint); }
.promo-mini strong { font-size: 22px; font-weight: 900; color: var(--navy); }
.status-box { background: var(--card); border: 1px dashed #B9C6D3; border-radius: 20px; padding: 36px 24px; text-align: center; color: var(--ink-2); }

/* ---------- 車款卡 ---------- */
.tabs { display: flex; flex-wrap: wrap; gap: 10px; }
.tab { font: inherit; font-size: 16px; font-weight: 700; min-height: 44px; padding: 9px 22px; border-radius: 999px; cursor: pointer; background: var(--card); color: var(--ink); border: 1px solid #C3CED8; }
.tab[aria-pressed="true"] { background: var(--navy); color: #FFFFFF; border-color: var(--navy); }
.model-grid { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 24px; }
.model { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; display: flex; flex-direction: column; }
.model-media { aspect-ratio: 4 / 3; background: #E9EEF2; display: flex; align-items: center; justify-content: center; }
.model-media img { width: 100%; height: 100%; object-fit: cover; }
.model-body { padding: 22px 26px 26px; display: flex; flex-direction: column; gap: 10px; flex: 1; }
.model-body h3 { font-size: 22px; font-weight: 700; }
.model-cat { align-self: flex-start; background: #E3FBEF; color: var(--link); font-size: 13px; font-weight: 700; padding: 3px 10px; border-radius: 999px; }
.model-specs { margin: 0; padding-left: 20px; color: var(--ink-2); }
.model-note { font-size: 14px; color: var(--muted); background: var(--bg); border-radius: 10px; padding: 8px 12px; }
.model-foot { margin-top: auto; padding-top: 12px; display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 12px; }
.model-price { font-size: 18px; font-weight: 700; color: var(--navy); }

/* ---------- 資訊列表 ---------- */
.info { margin: 0; display: grid; grid-template-columns: 96px 1fr; gap: 12px 16px; font-size: 17px; }
.info dt { color: var(--muted); }
.info dd { margin: 0; }
.map { width: 100%; min-height: 420px; border: 0; border-radius: 28px; background: #E9EEF2; }

/* ---------- 步驟 ---------- */
.steps { margin: 0; padding: 0; list-style: none; display: grid; gap: 20px; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.steps li { background: var(--bg); border-radius: 20px; padding: 28px; display: flex; flex-direction: column; gap: 10px; }
.step-no { width: 44px; height: 44px; border-radius: 999px; background: var(--mint); color: var(--navy); font-weight: 900; font-size: 18px; display: flex; align-items: center; justify-content: center; }
.steps strong { font-size: 20px; }

/* ---------- 常見問題 ---------- */
.faq details { border-bottom: 1px solid var(--line); }
.faq summary { list-style: none; cursor: pointer; padding: 18px 0; font-size: 18px; font-weight: 700; display: flex; justify-content: space-between; gap: 16px; min-height: 44px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: '＋'; flex: none; }
.faq details[open] summary::after { content: '－'; }
.faq details p { padding: 0 0 18px; color: var(--ink-2); }

/* ---------- 深色橫幅 ---------- */
.banner { background: var(--navy); border-radius: 32px; padding: 56px; display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 28px; color: #FFFFFF; }
.banner h2 { font-size: 36px; line-height: 1.3; font-weight: 900; }
.banner p { color: var(--on-navy); }

/* ---------- 頁尾 ---------- */
.site-footer { background: var(--navy); color: var(--on-navy); padding: 52px 0 36px; font-size: 15px; }
.site-footer .top { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 28px; }
.site-footer img { height: 44px; width: auto; align-self: flex-start; }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 10px 26px; }
.site-footer a { color: var(--on-navy); text-decoration: none; }
.site-footer a:hover { color: #FFFFFF; }
.site-footer .bottom { margin-top: 32px; padding-top: 18px; border-top: 1px solid var(--navy-line); color: var(--on-navy-2); font-size: 14px; }

/* ---------- 手機與平板 ---------- */
@media (max-width: 1140px) {
  .menu-toggle { display: inline-flex; }
  .site-header .wrap { flex-wrap: wrap; }
  .nav { display: none; width: 100%; flex-direction: column; align-items: stretch; gap: 0; padding: 8px 0 4px; }
  .nav.open { display: flex; }
  .nav a.nav-link { font-size: 17px; padding: 12px 0; border-bottom: 1px solid var(--navy-line); }
  .nav a.nav-link[aria-current="page"] { border-bottom-color: var(--navy-line); color: var(--mint); }
  .nav-actions { flex-direction: column; padding-top: 12px; }
  .brand img { height: 40px; }
}
@media (max-width: 640px) {
  body { font-size: 16px; }
  .wrap { padding: 0 20px; }
  .section { padding: 56px 0; }
  .hero { padding: 24px 0 48px; }
  .hero .split { flex-direction: column-reverse; gap: 22px; }
  .hero h1 { font-size: 40px; }
  .hero .photo { height: 300px; border-radius: 22px; }
  .page-hero h1 { font-size: 32px; }
  .page-hero .photo { height: 220px; }
  :root { --about-h: 220px; }
  .h2 { font-size: 28px; }
  .banner { padding: 32px 24px; border-radius: 24px; }
  .banner h2 { font-size: 26px; }
  .btn-row .btn { flex: 1 1 100%; }
  .info { grid-template-columns: 80px 1fr; font-size: 16px; }
  .map { min-height: 260px; border-radius: 20px; }
  .card { padding: 24px; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }