/* Header */
header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: saturate(1.2) blur(10px);
  border-bottom: 1px solid var(--border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.brand {
  font-weight: 800;
  letter-spacing: 0.3px;
}

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

nav a {
  color: var(--muted);
  text-decoration: none;
  margin-left: 18px;
}

nav a:hover {
  color: var(--text);
}

/* Hero */
.hero {
  padding: 96px 0 60px;
  position: relative;
}

.hero-grid {
  display: grid;
  gap: 32px;
  grid-template-columns: 1.2fr 0.8fr;
}

.tag {
  display: inline-block;
  padding: 6px 10px;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--muted);
  font-size: 12px;
}

.title {
  font-size: 42px;
  line-height: 1.12;
  margin: 14px 0;
}

.subtitle {
  color: var(--muted);
  margin: 14px 0 24px;
}

.cta {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.cta+.cta {
  margin-top: 8px;
}

.photo {
  border-radius: 20px;
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.photo img {
  display: block;
  width: 100%;
  height: auto;
}

/* Sections */
section {
  padding: 72px 0;
  border-top: 1px solid var(--border);
}

h2 {
  font-size: 28px;
  margin: 0 0 18px;
}

.muted {
  color: var(--muted);
}

/* Grid */
.grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 18px;
}

/* 漢堡鍵預設隱藏（桌機） */
.nav-toggle {
  display: none;
}

/* 手機版導覽 */
@media (max-width: 768px) {
  .nav {
    height: 56px;
  }

  /* 顯示漢堡鍵 */
  .nav-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    margin-left: 8px;
    border: 1px solid var(--border);
    border-radius: 10px;
    background: var(--card);
    color: var(--text);
  }

  /* 品牌太長時截斷，避免擠掉選單 */
  .brand {
    max-width: 55vw;
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
  }

  /* 把 nav 變成下拉面板 */
  header .nav nav {
    position: fixed;
    left: 0;
    right: 0;
    top: 56px;
    display: none;
    flex-direction: column;
    gap: 6px;
    background: color-mix(in srgb, var(--bg) 96%, transparent);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--border);
    padding: 10px 20px 14px;
  }

  header .nav nav.is-open {
    display: flex;
  }

  /* 手機版的連結排版 */
  header .nav nav a {
    margin: 0;
    padding: 10px 0;
    font-size: 16px;
  }
}