/* 1. 全站設定：集中管理顏色與內容寬度，方便調整。 */
:root {
  --background: #faf8f3;
  --surface: #ffffff;
  --text: #253d34;
  --muted: #58665f;
  --accent: #315747;
  --border: #d8ded5;
  --content-width: 1080px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--background);
  color: var(--text);
  font-family: system-ui, -apple-system, "Microsoft JhengHei", sans-serif;
  line-height: 1.8;
  overflow-wrap: anywhere;
}

a {
  color: inherit;
  text-underline-offset: 0.25em;
}

a:hover {
  text-decoration: underline;
}

a:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 5px;
}

h1, h2, h3, p {
  margin: 0;
}

h1, h2, h3 {
  line-height: 1.4;
}

.container {
  width: min(calc(100% - 40px), var(--content-width));
  margin-inline: auto;
}

.skip-link {
  position: absolute;
  top: 8px;
  left: 20px;
  z-index: 1;
  padding: 10px 16px;
  background: var(--surface);
  transform: translateY(-160%);
}

.skip-link:focus {
  transform: translateY(0);
}

/* 2. 手機導覽直接換行，不依賴 JavaScript。 */
.site-header {
  border-bottom: 1px solid var(--border);
}

.header-content {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding-block: 20px;
}

.brand {
  font-size: 1.125rem;
  font-weight: 700;
  text-decoration: none;
}

.nav-list {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 20px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav-list a {
  display: inline-block;
  padding-block: 10px;
  font-size: 0.9375rem;
  text-decoration: none;
}

.nav-list a:hover {
  text-decoration: underline;
}

/* 3. 主視覺只使用 CSS 色彩，不載入外部圖片或字型。 */
.hero {
  padding-block: 64px 72px;
  background: linear-gradient(120deg, #f0eee4, #e4ece3);
  border-bottom: 1px solid var(--border);
}

.hero-content {
  border-left: 3px solid var(--accent);
  padding-left: 24px;
}

.eyebrow, .section-number {
  color: var(--muted);
  font-size: 0.875rem;
  letter-spacing: 0.12em;
  margin-bottom: 16px;
}

h1 {
  font-size: clamp(2.4rem, 7vw, 4.8rem);
  letter-spacing: 0.04em;
}

.hero-description {
  margin-top: 24px;
  color: var(--muted);
}

.pending {
  display: inline-block;
  font-weight: 600;
}

.button {
  display: inline-flex;
  align-items: center;
  gap: 24px;
  margin-top: 32px;
  padding: 12px 20px;
  border-radius: 4px;
  background: var(--accent);
  color: white;
  text-decoration: none;
}

/* 4. 各內容區塊：預設單欄，較寬螢幕再切換為雙欄。 */
.section {
  padding-block: 56px;
}

.section-layout {
  display: grid;
  gap: 24px;
}

.section-number {
  margin-bottom: 8px;
}

h2 {
  font-size: 1.75rem;
}

h3 {
  margin-bottom: 16px;
  font-size: 1.125rem;
}

.panel {
  min-width: 0;
  padding: 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
}

.panel > p {
  color: var(--muted);
}

.services-section {
  background: #eff2eb;
}

.detail-list {
  margin: 0;
}

.detail-list > div {
  padding-block: 16px;
  border-bottom: 1px solid var(--border);
}

.detail-list > div:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

dt {
  font-weight: 600;
}

dd {
  margin: 4px 0 0;
  color: var(--muted);
}

.contact-panel {
  border-top: 3px solid var(--accent);
}

.site-footer {
  padding-block: 24px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.875rem;
}

.footer-content {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.site-footer a {
  padding-block: 12px;
}

/* 4.5 手機版專屬微調：僅套用於 767px 以下，避免影響桌面版既有版面。 */
@media (max-width: 767px) {
  .header-content {
    padding-block: 14px;
    gap: 6px;
  }

  .brand {
    font-size: 1rem;
  }

  .nav-list {
    justify-content: space-between;
    gap: 6px 12px;
  }

  .nav-list a {
    padding-block: 8px;
    font-size: 0.875rem;
  }

  .hero {
    padding-block: 40px 48px;
  }

  h1 {
    font-size: clamp(2rem, 8vw, 3.25rem);
    letter-spacing: 0.02em;
  }

  .eyebrow {
    margin-bottom: 12px;
  }

  .hero-description {
    margin-top: 16px;
  }

  .button {
    margin-top: 20px;
  }

  .section {
    padding-block: 36px;
  }

  .section-layout {
    gap: 16px;
  }

  .section-heading {
    margin-bottom: 0;
  }

  .panel {
    padding: 20px;
  }
}

/* 5. 桌面與平板：延續手機樣式，只覆寫需要變動的部分。 */
@media (min-width: 768px) {
  .header-content {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
  }

  .hero {
    padding-block: 96px;
  }

  .hero-content {
    padding-left: 40px;
  }

  .section {
    padding-block: 80px;
  }

  .section-layout {
    grid-template-columns: 1fr 2fr;
    gap: 48px;
  }

  .panel {
    padding: 32px;
  }

  .detail-list > div {
    display: grid;
    grid-template-columns: 120px 1fr;
    gap: 24px;
  }

  dd {
    margin: 0;
  }
}