/* =============================================================
   跨境商品平台 — 共用樣式
   Mobile First：預設為手機樣式，min-width: 768px 起為桌面增強
   色彩系統：白底 + 主色(深藍 #1f4e8c) + 強調色(橙 #e8853d)
   ============================================================= */

:root {
  --color-primary: #1f4e8c;
  --color-primary-dark: #163a68;
  --color-primary-light: #eaf0f8;
  --color-accent: #e8853d;
  --color-accent-dark: #d1702a;
  --color-text: #22303f;
  --color-text-muted: #64748b;
  --color-bg: #ffffff;
  --color-bg-soft: #f5f7fa;
  --color-border: #e3e8ee;
  --color-success: #2f9e6e;
  --color-danger: #c0563f;
  --radius: 14px;
  --radius-sm: 8px;
  --shadow-card: 0 1px 3px rgba(34, 48, 63, 0.08), 0 2px 8px rgba(34, 48, 63, 0.05);
  --shadow-card-hover: 0 4px 14px rgba(34, 48, 63, 0.12);
  --font-base: "PingFang TC", "Microsoft JhengHei", "Noto Sans TC", "Segoe UI", system-ui, sans-serif;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-base);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

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

button,
input,
select,
textarea {
  font-family: inherit;
  font-size: 1rem;
  color: inherit;
}

/* ---------- 導覽列 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 16px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--color-primary);
  white-space: nowrap;
}

.brand-mark {
  width: 30px;
  height: 30px;
  border-radius: 8px;
  background: var(--color-primary);
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
}

.nav-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  color: var(--color-primary);
}

.nav-toggle svg {
  width: 22px;
  height: 22px;
}

.nav-menu {
  display: none;
  position: absolute;
  left: 0;
  right: 0;
  top: 60px;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-card);
  padding: 8px 0;
}

.nav-menu.open {
  display: block;
}

.nav-menu a {
  display: block;
  padding: 13px 20px;
  color: var(--color-text);
  font-weight: 500;
  border-left: 3px solid transparent;
}

.nav-menu a:hover,
.nav-menu a:focus {
  background: var(--color-bg-soft);
  color: var(--color-primary);
}

.nav-menu a.active {
  color: var(--color-primary);
  border-left-color: var(--color-primary);
  background: var(--color-primary-light);
}

/* ---------- 主內容 ---------- */
.site-main {
  flex: 1;
  width: 100%;
}

.container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 24px 16px;
}

.page-head {
  margin-bottom: 20px;
}

.page-head h1 {
  font-size: 1.55rem;
  line-height: 1.3;
  color: var(--color-text);
}

.page-head .sub {
  margin-top: 6px;
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

/* ---------- 首頁 Hero ---------- */
.hero {
  padding: 0 16px;
}

.hero-inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 40px 8px 8px;
  text-align: center;
}

.hero h1 {
  font-size: 1.9rem;
  line-height: 1.35;
  font-weight: 800;
  color: var(--color-text);
  letter-spacing: 0.5px;
}

.hero h1 .accent {
  color: var(--color-primary);
}

.hero .subtitle {
  margin-top: 12px;
  font-size: 1.02rem;
  color: var(--color-text-muted);
}

/* ---------- 首頁入口卡片 ---------- */
.entrance-list {
  max-width: 1080px;
  margin: 0 auto;
  padding: 28px 16px 8px;
  display: grid;
  gap: 16px;
}

.entrance-card {
  display: block;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 22px 18px;
  box-shadow: var(--shadow-card);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.entrance-card:hover,
.entrance-card:focus-visible {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-2px);
}

.entrance-card .flag {
  font-size: 1.9rem;
  line-height: 1;
}

.entrance-card h2 {
  margin-top: 10px;
  font-size: 1.15rem;
  color: var(--color-text);
}

.entrance-card p {
  margin-top: 6px;
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

.entrance-card.is-inbound {
  border-top: 4px solid var(--color-primary);
}

.entrance-card.is-outbound {
  border-top: 4px solid var(--color-accent);
}

.entrance-card.is-cta {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  border-color: var(--color-primary-dark);
  text-align: center;
  padding: 24px 18px;
}

.entrance-card.is-cta .flag {
  font-size: 2.1rem;
}

.entrance-card.is-cta h2 {
  color: #fff;
  font-size: 1.2rem;
}

.entrance-card.is-cta p {
  color: rgba(255, 255, 255, 0.85);
}

/* ---------- 首頁 How it works ---------- */
.how-section {
  max-width: 1080px;
  margin: 0 auto;
  padding: 28px 16px 8px;
}

.how-section h2 {
  font-size: 1.2rem;
  margin-bottom: 14px;
}

.steps {
  display: grid;
  gap: 12px;
}

.step {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  background: var(--color-bg-soft);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 14px;
}

.step-num {
  flex: 0 0 30px;
  height: 30px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.95rem;
}

.step h3 {
  font-size: 1rem;
}

.step p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin-top: 2px;
}

/* ---------- 商品卡片 & 列表 ---------- */
.products-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}

.product-card {
  display: block;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.product-card:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-2px);
}

.product-cover {
  position: relative;
  aspect-ratio: 4 / 3;
  background: var(--color-primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
}

.product-cover .cover-emoji {
  font-size: 3rem;
  line-height: 1;
}

.badge-demo {
  position: absolute;
  top: 8px;
  left: 8px;
  background: var(--color-primary);
  color: #fff;
  font-size: 0.7rem;
  padding: 3px 8px;
  border-radius: 999px;
  font-weight: 600;
  letter-spacing: 0.3px;
}

.badge-demo.is-hero {
  background: var(--color-accent);
  position: static;
  margin-right: 8px;
}

.product-info {
  padding: 12px;
}

.product-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-text);
  line-height: 1.35;
  min-height: 2.6em;
}

.product-price {
  margin-top: 6px;
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-accent-dark);
}

.product-price .currency {
  font-size: 0.8rem;
}

.product-meta {
  margin-top: 4px;
  font-size: 0.78rem;
  color: var(--color-text-muted);
}

.list-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
}

.list-count {
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

.filter-select {
  padding: 8px 10px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg);
  color: var(--color-text);
  font-size: 0.9rem;
}

/* ---------- 商品詳情頁 ---------- */
.product-hero {
  display: grid;
  gap: 16px;
}

.product-img {
  aspect-ratio: 4 / 3;
  background: var(--color-primary-light);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.product-img .cover-emoji {
  font-size: 5rem;
  line-height: 1;
}

.product-summary h1 {
  font-size: 1.4rem;
  line-height: 1.35;
  color: var(--color-text);
}

.price-box {
  margin-top: 14px;
  background: var(--color-bg-soft);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 14px;
}

.price-box .ref-price {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--color-accent-dark);
}

.price-box .landed-price {
  margin-top: 4px;
  font-size: 0.95rem;
  color: var(--color-text);
}

.price-box .disclaimer {
  margin-top: 8px;
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.info-grid {
  margin-top: 14px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--color-border);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
}

.info-item {
  background: var(--color-bg);
  padding: 10px 12px;
}

.info-item dt {
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

.info-item dd {
  margin-top: 2px;
  font-size: 0.92rem;
  font-weight: 600;
}

.tags-row {
  margin-top: 12px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag {
  background: var(--color-primary-light);
  color: var(--color-primary);
  font-size: 0.78rem;
  padding: 4px 10px;
  border-radius: 999px;
  font-weight: 500;
}

.detail-section {
  margin-top: 24px;
}

.detail-section h2 {
  font-size: 1.1rem;
  margin-bottom: 10px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--color-primary-light);
}

.detail-section p,
.detail-section li {
  font-size: 0.95rem;
}

.detail-section ul {
  padding-left: 18px;
}

.compliance-box {
  margin-top: 20px;
  background: #fff8ee;
  border: 1px solid #f0dcc2;
  border-radius: var(--radius);
  padding: 14px;
}

.compliance-box h2 {
  font-size: 1rem;
  color: var(--color-accent-dark);
  margin-bottom: 8px;
  border: none;
  padding: 0;
}

.compliance-box ul {
  padding-left: 18px;
  font-size: 0.86rem;
  color: var(--color-text);
}

.compliance-box li {
  margin-bottom: 4px;
}

/* ---------- 按鈕 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: none;
  border-radius: var(--radius-sm);
  padding: 13px 20px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.15s ease, transform 0.1s ease;
}

.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
}

.btn-primary:hover {
  background: var(--color-primary-dark);
}

.btn-accent {
  background: var(--color-accent);
  color: #fff;
}

.btn-accent:hover {
  background: var(--color-accent-dark);
}

.btn-outline {
  background: var(--color-bg);
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
}

.btn-outline:hover {
  background: var(--color-primary-light);
}

.btn-block {
  width: 100%;
}

.btn-row {
  display: grid;
  gap: 10px;
  margin-top: 18px;
}

/* ---------- 表單 ---------- */
.form-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  padding: 20px;
}

.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 6px;
}

.form-group .optional {
  font-weight: 400;
  color: var(--color-text-muted);
  font-size: 0.8rem;
}

.form-group small.hint {
  display: block;
  margin-top: 4px;
  font-size: 0.78rem;
  color: var(--color-text-muted);
}

.form-control {
  width: 100%;
  padding: 11px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg);
  font-size: 1rem;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.form-control:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(31, 78, 140, 0.12);
}

textarea.form-control {
  min-height: 110px;
  resize: vertical;
}

.radio-row {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.radio-row label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-weight: 400;
  cursor: pointer;
}

.form-error {
  display: none;
  background: #fdf0ec;
  border: 1px solid #f2c9bd;
  color: var(--color-danger);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  font-size: 0.88rem;
  margin-bottom: 14px;
}

.form-error.show {
  display: block;
}

.form-note {
  margin-top: 14px;
  font-size: 0.8rem;
  color: var(--color-text-muted);
  text-align: center;
}

/* ---------- 成功頁 ---------- */
.success-box {
  text-align: center;
  padding: 40px 8px;
  max-width: 560px;
  margin: 0 auto;
}

.success-icon {
  width: 72px;
  height: 72px;
  margin: 0 auto 18px;
  border-radius: 50%;
  background: var(--color-success);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 36px;
}

.success-box h1 {
  font-size: 1.4rem;
  color: var(--color-text);
}

.success-box .success-msg {
  margin-top: 12px;
  color: var(--color-text-muted);
  line-height: 1.7;
}

.success-box .order-ref {
  margin-top: 16px;
  display: inline-block;
  background: var(--color-bg-soft);
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-sm);
  padding: 8px 16px;
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

.success-actions {
  margin-top: 24px;
  display: grid;
  gap: 10px;
}

/* ---------- 樣例卡片 (列表頁) ---------- */
.sample-card {
  background: var(--color-bg-soft);
  border: 1px dashed var(--color-border);
  border-radius: var(--radius);
  padding: 16px;
  text-align: center;
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

/* ---------- 頁尾 ---------- */
.site-footer {
  border-top: 1px solid var(--color-border);
  background: var(--color-bg-soft);
  margin-top: 40px;
}

.footer-inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 24px 16px;
  text-align: center;
  font-size: 0.82rem;
  color: var(--color-text-muted);
}

.footer-inner .nav-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px 20px;
  margin-bottom: 14px;
}

.footer-inner .nav-links a {
  color: var(--color-text-muted);
}

.footer-inner .nav-links a:hover {
  color: var(--color-primary);
}

.footer-inner .disclaimer {
  margin-top: 10px;
  line-height: 1.7;
}

/* ---------- 空狀態 ---------- */
.empty-state {
  text-align: center;
  padding: 40px 16px;
  color: var(--color-text-muted);
}

/* ---------- 桌面版增強 (min-width: 768px) ---------- */
@media (min-width: 768px) {
  .nav-toggle {
    display: none;
  }

  .nav-menu {
    display: flex;
    position: static;
    background: none;
    border: none;
    box-shadow: none;
    padding: 0;
    gap: 4px;
  }

  .nav-menu a {
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    border-left: none;
  }

  .nav-menu a.active {
    background: var(--color-primary-light);
  }

  .hero-inner {
    padding: 64px 0 16px;
  }

  .hero h1 {
    font-size: 2.6rem;
    max-width: 760px;
    margin: 0 auto;
  }

  .hero .subtitle {
    font-size: 1.15rem;
  }

  .entrance-list {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    padding-top: 40px;
  }

  .entrance-card.is-cta {
    grid-column: 1 / -1;
  }

  .steps {
    grid-template-columns: repeat(3, 1fr);
  }

  .products-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
  }

  .product-hero {
    grid-template-columns: 1fr 1fr;
    gap: 28px;
    align-items: start;
  }

  .product-cover .cover-emoji {
    font-size: 4rem;
  }

  .info-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .form-card {
    max-width: 640px;
  }
}

@media (min-width: 1024px) {
  .products-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* ---------- 無障礙 & 減少動效 ---------- */
@media (prefers-reduced-motion: reduce) {
  * {
    transition: none !important;
    animation: none !important;
  }
}

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}
/* ============ 語言切換器 ============ */
.lang-switcher {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: 12px;
  font-size: 0.85rem;
  white-space: nowrap;
}
.lang-btn {
  background: none;
  border: none;
  padding: 2px 4px;
  cursor: pointer;
  color: var(--color-text-muted, #666);
  font-size: 0.85rem;
  border-radius: 4px;
  transition: color 0.15s;
}
.lang-btn:hover { color: var(--color-primary, #2563eb); }
.lang-btn.active { color: var(--color-primary, #2563eb); font-weight: 700; }
.lang-sep { color: var(--color-text-muted, #999); }
.header-inner { flex-wrap: wrap; }
@media (min-width: 768px) {
  .lang-switcher { margin-left: 16px; }
}