/* ============================================================
   Oden Peak — Global Layout
   Site width: 1440px
   ============================================================ */

/* ----------------------------------------------------------
   1. Container
   ---------------------------------------------------------- */
.container {
  width: 100%;
  max-width: 1440px;
  margin-inline: auto;
  padding-inline: var(--space-20);  /* 80px sides */
}

.container-narrow {
  width: 100%;
  max-width: 1200px;
  margin-inline: auto;
  padding-inline: var(--space-20);
}

.container-wide {
  width: 100%;
  max-width: 1440px;
  margin-inline: auto;
  padding-inline: var(--space-12);  /* 48px sides */
}

/* Full-bleed (no padding, for edge-to-edge sections) */
.container-fluid {
  width: 100%;
}


/* ----------------------------------------------------------
   2. Section Spacing
   ---------------------------------------------------------- */
.section {
  padding-block: var(--space-20);  /* 80px top & bottom */
}

.section-sm {
  padding-block: var(--space-12);  /* 48px */
}

.section-lg {
  padding-block: var(--space-24);  /* 96px */
}

.section-xl {
  padding-block: calc(var(--space-24) + var(--space-12));  /* 144px */
}

/* Alternate background sections */
.section-alt {
  background-color: var(--bg-section-alt);
}

.section-dark {
  background-color: var(--bg-dark);
  color: var(--color-white);
}

.section-primary {
  background-color: var(--color-primary);
  color: var(--color-white);
}

.section-nature {
  background-color: var(--color-nature-light);
}


/* ----------------------------------------------------------
   3. Grid System
   ---------------------------------------------------------- */
.grid {
  display: grid;
  gap: var(--space-6);
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-5 { grid-template-columns: repeat(5, 1fr); }
.grid-6 { grid-template-columns: repeat(6, 1fr); }

/* Auto-fit grids (responsive by default) */
.grid-auto-sm {
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

.grid-auto-md {
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.grid-auto-lg {
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
}

/* Gap modifiers */
.gap-sm  { gap: var(--space-4); }
.gap-md  { gap: var(--space-6); }
.gap-lg  { gap: var(--space-8); }
.gap-xl  { gap: var(--space-12); }


/* ----------------------------------------------------------
   4. Flex Utilities
   ---------------------------------------------------------- */
.flex          { display: flex; }
.flex-col      { flex-direction: column; }
.flex-wrap     { flex-wrap: wrap; }
.flex-center   { align-items: center; justify-content: center; }
.flex-between  { align-items: center; justify-content: space-between; }
.flex-start    { align-items: center; justify-content: flex-start; }
.flex-end      { align-items: center; justify-content: flex-end; }
.items-start   { align-items: flex-start; }
.items-center  { align-items: center; }
.items-end     { align-items: flex-end; }
.justify-center{ justify-content: center; }
.flex-1        { flex: 1; }
.flex-none     { flex: none; }


/* ----------------------------------------------------------
   5. Site Header
   ---------------------------------------------------------- */

/* 外层：fixed 定位，上下内边距形成悬浮感 */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: var(--z-sticky);
  padding-block: 2.5rem;
}

/* 限宽容器 */
.site-header__container {
  width: 100%;
  max-width: 1440px;
  margin-inline: auto;
  padding-inline: var(--space-8);
}

/* 白色圆角卡片条 */
.site-header__bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
  padding-inline: var(--space-8);
  background-color: var(--color-white);
  border-radius: 60px;
}

/* ── Logo ── */
.site-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
  text-decoration: none;
}

.site-logo__img {
  height: 38px;
  width: auto;
  display: block;
}

.site-logo__text {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: var(--fw-extrabold);
  color: var(--color-primary);
  letter-spacing: -0.01em;
}

/* ── Primary Navigation ── */
.site-nav {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  list-style: none;
}

.site-nav__item {
  position: relative;
}

.site-nav__link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-2) var(--space-5);
  font-size: var(--text-base);             /* 16px */
  font-weight: var(--fw-medium);
  color: var(--text-primary);
  border-radius: var(--border-radius-full);
  transition: color var(--transition-fast),
              background-color var(--transition-fast);
  white-space: nowrap;
  text-decoration: none;
}

.site-nav__link:hover,
.site-nav__link.is-active {
  color: var(--color-white);
  background-color: var(--color-primary);
}

/* ── Chevron icon ── */
.site-nav__chevron {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
  transition: transform var(--transition-fast);
}

.site-nav__item--has-dropdown:hover .site-nav__chevron {
  transform: rotate(180deg);
}

/* ── Dropdown ── */
.site-nav__dropdown {
  position: absolute;
  top: calc(100% + var(--space-2));
  left: 50%;
  transform: translateX(-50%) translateY(-6px);
  min-width: 160px;
  background-color: var(--color-white);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  padding: var(--space-2);
  list-style: none;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-fast),
              visibility var(--transition-fast),
              transform var(--transition-fast);
  z-index: var(--z-dropdown);
}

.site-nav__item--has-dropdown:hover .site-nav__dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.site-nav__dropdown-link {
  display: block;
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  font-weight: var(--fw-medium);
  color: var(--text-primary);
  border-radius: var(--border-radius);
  white-space: nowrap;
  text-decoration: none;
  transition: color var(--transition-fast),
              background-color var(--transition-fast);
}

.site-nav__dropdown-link:hover {
  color: var(--color-white);
  background-color: var(--color-primary);
}

.site-nav__dropdown-link.is-active {
  color: var(--color-white);
  background-color: var(--color-primary);
}

/* ── Header Actions ── */
.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
}

/* Mobile menu toggle （桌面端隐藏） */
.header-menu-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--border-radius);
  cursor: pointer;
  color: var(--text-primary);
}


/* ----------------------------------------------------------
   6. Site Footer
   ---------------------------------------------------------- */
.site-footer {
  position: relative;
  background-color: var(--color-white);
  color: var(--color-gray-600);
  padding-top: var(--space-16);
}

.site-footer__top {
  display: grid;
  grid-template-columns: 1.5fr repeat(3, 1fr);
  gap: var(--space-12);
  padding-bottom: var(--space-12);
  border-bottom: 1px solid var(--color-gray-200);
}

.site-footer__brand {}

.site-footer__logo {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
  text-decoration: none;
}

.site-footer__logo-img {
  height: 36px;
  width: auto;
}

.site-footer__logo-text {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--fw-extrabold);
  color: var(--color-gray-900);
  letter-spacing: -0.02em;
  text-transform: uppercase;
}

.site-footer__desc {
  font-size: var(--text-sm);
  line-height: var(--lh-relaxed);
  color: var(--color-gray-500);
  margin-bottom: var(--space-6);
  max-width: 300px;
}

.site-footer__socials {
  display: flex;
  gap: var(--space-3);
}

.site-footer__social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--border-radius-full);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: var(--color-gray-400);
  transition: background-color var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
}

.site-footer__social-link:hover {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-white);
}

.site-footer__col-title {
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: var(--fw-semibold);
  color: var(--color-gray-900);
  margin-bottom: var(--space-5);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.site-footer__links {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.site-footer__link {
  font-size: var(--text-sm);
  color: var(--color-gray-500);
  transition: color var(--transition-fast);
  text-decoration: none;
}

.site-footer__link:hover {
  color: var(--color-primary);
}

.site-footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: var(--space-6);
  border-top: 1px solid var(--color-gray-200);
  font-size: var(--text-sm);
  color: var(--color-gray-400);
}

.site-footer__copy {}

.site-footer__legal {
  display: flex;
  gap: var(--space-6);
}

.site-footer__legal-link {
  color: var(--color-gray-400);
  transition: color var(--transition-fast);
  text-decoration: none;
}

.site-footer__legal-link:hover {
  color: var(--color-gray-900);
}


/* ----------------------------------------------------------
   7. Page Layout
   ---------------------------------------------------------- */
.page-main {
  min-height: 60vh;
}

/* Two-column layout: sidebar + content */
.layout-sidebar {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: var(--space-8);
  align-items: start;
}

.layout-sidebar--right {
  grid-template-columns: 1fr 280px;
}

/* Sticky sidebar */
.sidebar-sticky {
  position: sticky;
  top: calc(72px + var(--space-8));  /* header height + gap */
}


/* ----------------------------------------------------------
   8. Breadcrumb
   ---------------------------------------------------------- */
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--text-muted);
}

.breadcrumb__item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.breadcrumb__link {
  color: var(--text-muted);
  transition: color var(--transition-fast);
  text-decoration: none;
}

.breadcrumb__link:hover {
  color: var(--color-primary);
}

.breadcrumb__separator {
  color: var(--color-gray-300);
  font-size: var(--text-xs);
}

.breadcrumb__current {
  color: var(--text-primary);
  font-weight: var(--fw-medium);
}


/* ----------------------------------------------------------
   9. Pagination
   ---------------------------------------------------------- */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
}

.pagination__item {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 40px;
  padding-inline: var(--space-3);
  font-size: var(--text-sm);
  font-weight: var(--fw-medium);
  border-radius: var(--border-radius);
  border: 1.5px solid var(--border-color);
  color: var(--text-primary);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
}

.pagination__item:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background-color: var(--color-primary-bg);
}

.pagination__item.is-active {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-white);
}

.pagination__item.is-disabled {
  opacity: 0.4;
  cursor: not-allowed;
  pointer-events: none;
}


/* ----------------------------------------------------------
   10. Responsive Breakpoints
   ---------------------------------------------------------- */

/* Large desktop: ≤ 1440px */
@media (max-width: 1440px) {
  .container,
  .container-wide {
    padding-inline: var(--space-16);
  }
}

/* Desktop: ≤ 1280px */
@media (max-width: 1280px) {
  .container,
  .container-narrow,
  .container-wide {
    padding-inline: var(--space-12);
  }

  .site-footer__top {
    grid-template-columns: 1.2fr repeat(3, 1fr);
    gap: var(--space-8);
  }
}

/* Tablet landscape: ≤ 1024px */
@media (max-width: 1024px) {
  .container,
  .container-narrow,
  .container-wide {
    padding-inline: var(--space-8);
  }

  h1 { font-size: var(--text-4xl); }
  h2 { font-size: var(--text-3xl); }
  h3 { font-size: var(--text-2xl); }

  .section-title { font-size: var(--text-2xl); }

  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-5 { grid-template-columns: repeat(2, 1fr); }
  .grid-6 { grid-template-columns: repeat(3, 1fr); }

  .layout-sidebar {
    grid-template-columns: 240px 1fr;
  }

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

/* Tablet portrait: ≤ 768px */
@media (max-width: 768px) {
  h1 { font-size: var(--text-3xl); }
  h2 { font-size: var(--text-2xl); }
  h3 { font-size: var(--text-xl); }

  .section { padding-block: var(--space-12); }
  .section-lg { padding-block: var(--space-16); }

  .section-title { font-size: var(--text-xl); }

  .grid-2,
  .grid-3 { grid-template-columns: 1fr; }

  .layout-sidebar,
  .layout-sidebar--right {
    grid-template-columns: 1fr;
  }

  .site-header__inner {
    height: 60px;
  }

  .site-nav { display: none; }

  .header-menu-toggle { display: flex; }

  .site-footer__top {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }

  .site-footer__bottom {
    flex-direction: column;
    gap: var(--space-4);
    text-align: center;
  }

  .site-footer__legal {
    justify-content: center;
    flex-wrap: wrap;
    gap: var(--space-4);
  }
}

/* Mobile: ≤ 480px */
@media (max-width: 480px) {
  .container,
  .container-narrow,
  .container-wide {
    padding-inline: var(--space-4);
  }

  h1 { font-size: var(--text-2xl); }

  .section { padding-block: var(--space-10); }

  .grid-4,
  .grid-6 { grid-template-columns: repeat(2, 1fr); }

  .btn-xl {
    padding: var(--space-4) var(--space-8);
    font-size: var(--text-base);
  }
}