/* ============================================================
   layout.css - 布局样式
   容器、栅格、头部、底部等整体布局
   ============================================================ */

/* ---------- 容器 ---------- */
.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 20px;
}

.container--fluid {
  max-width: 100%;
  padding: 0 40px;
}

.container--narrow {
  max-width: 1000px;
}

/* ---------- 栅格系统 ---------- */
.row {
  display: flex;
  flex-wrap: wrap;
  margin: 0 -12px;
}

.col {
  flex: 1;
  padding: 0 12px;
}

.col-1 { flex: 0 0 8.333%; max-width: 8.333%; padding: 0 12px; }
.col-2 { flex: 0 0 16.666%; max-width: 16.666%; padding: 0 12px; }
.col-3 { flex: 0 0 25%; max-width: 25%; padding: 0 12px; }
.col-4 { flex: 0 0 33.333%; max-width: 33.333%; padding: 0 12px; }
.col-5 { flex: 0 0 41.666%; max-width: 41.666%; padding: 0 12px; }
.col-6 { flex: 0 0 50%; max-width: 50%; padding: 0 12px; }
.col-7 { flex: 0 0 58.333%; max-width: 58.333%; padding: 0 12px; }
.col-8 { flex: 0 0 66.666%; max-width: 66.666%; padding: 0 12px; }
.col-9 { flex: 0 0 75%; max-width: 75%; padding: 0 12px; }
.col-10 { flex: 0 0 83.333%; max-width: 83.333%; padding: 0 12px; }
.col-11 { flex: 0 0 91.666%; max-width: 91.666%; padding: 0 12px; }
.col-12 { flex: 0 0 100%; max-width: 100%; padding: 0 12px; }

/* ---------- 区块间距 ---------- */
.section {
  padding: var(--section-padding);
}

.section--sm {
  padding: 48px 0;
}

.section--lg {
  padding: 100px 0;
}

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

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

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

/* ---------- 页面顶部信息栏 ---------- */
.top-bar {
  background-color: var(--color-primary-dark);
  color: rgba(255, 255, 255, 0.8);
  font-size: var(--font-size-sm);
  height: 36px;
  line-height: 36px;
}

.top-bar__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.top-bar__left {
  display: flex;
  align-items: center;
  gap: 24px;
}

.top-bar__right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.top-bar__link {
  color: rgba(255, 255, 255, 0.8);
  transition: color var(--transition-base);
}

.top-bar__link:hover {
  color: #fff;
}

.top-bar__divider {
  width: 1px;
  height: 12px;
  background-color: rgba(255, 255, 255, 0.2);
}

/* ---------- 头部导航 ---------- */
.header {
  background-color: #fff;
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 1000;
  transition: box-shadow var(--transition-base);
}

.header--scrolled {
  box-shadow: var(--shadow-md);
}

.header__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: var(--header-height);
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-shrink: 0;
}

.logo__mark {
  width: 52px;
  height: 52px;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-family: var(--font-serif);
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  position: relative;
}

.logo__mark::before {
  content: '';
  position: absolute;
  inset: 3px;
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: var(--radius-sm);
}

.logo__text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.logo__name {
  font-family: var(--font-serif);
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  letter-spacing: 1px;
}

.logo__name-en {
  font-size: var(--font-size-xs);
  color: var(--color-text-tertiary);
  letter-spacing: 1px;
  margin-top: 4px;
}

/* 主导航 */
.nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav__item {
  position: relative;
}

.nav__link {
  display: block;
  padding: 0 20px;
  height: var(--header-height);
  line-height: var(--header-height);
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-regular);
  position: relative;
  transition: color var(--transition-base);
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 3px;
  background-color: var(--color-primary);
  transition: width var(--transition-base);
}

.nav__link:hover,
.nav__item:hover > .nav__link,
.nav__item.is-active > .nav__link {
  color: var(--color-primary);
}

.nav__link:hover::after,
.nav__item:hover > .nav__link::after,
.nav__item.is-active > .nav__link::after {
  width: 40px;
}

/* 二级下拉菜单 */
.nav__dropdown {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(10px);
  min-width: 160px;
  background-color: #fff;
  box-shadow: var(--shadow-lg);
  border-top: 3px solid var(--color-primary);
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  padding: 8px 0;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
  z-index: 1001;
}

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

.nav__dropdown-link {
  display: block;
  padding: 10px 20px;
  font-size: var(--font-size-sm);
  color: var(--color-text-regular);
  white-space: nowrap;
  text-align: center;
  transition: all var(--transition-base);
  border-left: 3px solid transparent;
}

.nav__dropdown-link:hover {
  background-color: var(--color-primary-bg);
  color: var(--color-primary);
  border-left-color: var(--color-primary);
}

/* ---------- 页面Banner（内页顶部图） ---------- */
.page-banner {
  height: 320px;
  background-size: cover;
  background-position: center;
  position: relative;
  display: flex;
  align-items: center;
}

.page-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(200, 16, 46, 0.85) 0%, rgba(30, 58, 95, 0.4) 100%);
}

/* 藏青主题：内页Banner渐变 */
html.theme-navy .page-banner::before {
  background: linear-gradient(135deg, rgba(10, 37, 64, 0.85) 0%, rgba(201, 169, 97, 0.25) 100%);
}

.page-banner__content {
  position: relative;
  z-index: 1;
  width: 100%;
  color: #fff;
  text-align: center;
}

.page-banner__title {
  font-family: var(--font-serif);
  font-size: var(--font-size-5xl);
  font-weight: var(--font-weight-bold);
  margin-bottom: 12px;
  letter-spacing: 4px;
}

.page-banner__subtitle {
  font-size: var(--font-size-lg);
  opacity: 0.85;
  letter-spacing: 2px;
}

/* ---------- 面包屑 ---------- */
.breadcrumb {
  padding: 16px 0;
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  border-bottom: 1px solid var(--color-border-light);
  background-color: #fff;
}

.breadcrumb__list {
  display: flex;
  align-items: center;
  gap: 8px;
}

.breadcrumb__item {
  display: flex;
  align-items: center;
}

.breadcrumb__link {
  color: var(--color-text-secondary);
  transition: color var(--transition-base);
}

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

.breadcrumb__separator {
  color: var(--color-text-placeholder);
  margin: 0 4px;
}

.breadcrumb__current {
  color: var(--color-text-regular);
}

/* ---------- 双栏布局（侧边栏 + 主内容） ---------- */
.sidebar-layout {
  display: flex;
  gap: 32px;
  padding: 40px 0;
}

.sidebar-layout__sidebar {
  width: 260px;
  flex-shrink: 0;
}

.sidebar-layout__main {
  flex: 1;
  min-width: 0;
}

/* ---------- 底部 ---------- */
.footer {
  background-color: var(--color-primary-dark);
  color: rgba(255, 255, 255, 0.6);
  padding-top: 60px;
}

.footer__top {
  display: flex;
  gap: 60px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer__col {
  flex: 1;
}

.footer__col--wide {
  flex: 1.5;
}

.footer__title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: #fff;
  margin-bottom: 20px;
  position: relative;
  padding-bottom: 12px;
}

.footer__title::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 30px;
  height: 2px;
  background-color: var(--color-secondary);
}

.footer__list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer__link {
  color: rgba(255, 255, 255, 0.6);
  font-size: var(--font-size-sm);
  transition: color var(--transition-base);
}

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

.footer__contact-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 12px;
  font-size: var(--font-size-sm);
  line-height: 1.6;
}

.footer__contact-icon {
  flex-shrink: 0;
  margin-top: 2px;
}

.footer__bottom {
  padding: 20px 0;
  text-align: center;
  font-size: var(--font-size-xs);
  color: rgba(255, 255, 255, 0.4);
}

.footer__bottom-line {
  margin-bottom: 6px;
}

/* ---------- 浮动工具条 ---------- */
.float-toolbar {
  position: fixed;
  right: 20px;
  bottom: 120px;
  z-index: 999;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.float-toolbar__toggle {
  position: absolute;
  right: 0;
  bottom: -50px;
  width: 44px;
  height: 44px;
  background-color: var(--color-primary);
  color: #fff;
  border-radius: var(--radius-md) 0 0 var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background-color var(--transition-base);
}

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

.float-toolbar__list {
  display: flex;
  flex-direction: column;
  background-color: #fff;
  border-radius: var(--radius-md) 0 0 var(--radius-md);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  transition: all var(--transition-base);
}

.float-toolbar.is-collapsed .float-toolbar__list {
  opacity: 0;
  transform: translateX(calc(100% + 30px));
  pointer-events: none;
}

.float-toolbar__item {
  position: relative;
  width: 56px;
  border-bottom: 1px solid var(--color-border-light);
  transition: background-color var(--transition-base);
}

.float-toolbar__item:last-child {
  border-bottom: none;
}

.float-toolbar__item:hover {
  background-color: var(--color-primary-bg);
}

.float-toolbar__btn {
  width: 100%;
  padding: 12px 8px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: color var(--transition-base);
}

.float-toolbar__item:hover .float-toolbar__btn {
  color: var(--color-primary);
}

.float-toolbar__icon {
  width: 24px;
  height: 24px;
}

.float-toolbar__popup {
  position: absolute;
  right: calc(100% + 10px);
  top: 50%;
  transform: translateY(-50%) translateX(10px);
  background-color: #fff;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: 16px;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
  white-space: nowrap;
  min-width: 140px;
}

.float-toolbar__item:hover .float-toolbar__popup {
  opacity: 1;
  visibility: visible;
  transform: translateY(-50%) translateX(0);
}

.float-toolbar__popup-title {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
  margin-bottom: 8px;
}

.float-toolbar__popup-content {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: 1.5;
}

.float-toolbar__popup-qr {
  width: 120px;
  height: 120px;
  background-color: var(--color-bg-grey);
  border-radius: var(--radius-sm);
} /* .float-toolbar__popup 结束 */

/* ---------- 主题切换 ---------- */
.theme-switcher {
  position: relative;
  flex-shrink: 0;
  margin-left: 20px;
}

.theme-switcher__btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  font-size: var(--font-size-sm);
  color: var(--color-text-regular);
  background-color: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-base);
  white-space: nowrap;
}

.theme-switcher__btn:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.theme-switcher__icon {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
}

.theme-switcher__arrow {
  font-size: 10px;
  transition: transform var(--transition-base);
  margin-left: 2px;
  opacity: 0.6;
}

.theme-switcher.is-open .theme-switcher__arrow {
  transform: rotate(180deg);
}

.theme-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 140px;
  background-color: #fff;
  box-shadow: var(--shadow-lg);
  border-radius: var(--radius-md);
  padding: 6px 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(6px);
  transition: all var(--transition-base);
  z-index: 1002;
}

.theme-dropdown.is-open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.theme-dropdown__item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  font-size: var(--font-size-sm);
  color: var(--color-text-regular);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.theme-dropdown__item:hover {
  background-color: var(--color-bg-grey);
  color: var(--color-primary);
}

.theme-dropdown__item.is-active {
  color: var(--color-primary);
  font-weight: var(--font-weight-medium);
  background-color: var(--color-primary-bg);
}

.theme-dropdown__dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  flex-shrink: 0;
  border: 1px solid rgba(0, 0, 0, 0.1);
}

.theme-dropdown__dot--red {
  background: linear-gradient(135deg, #C8102E 0%, #1E3A5F 100%);
}

.theme-dropdown__dot--navy {
  background: linear-gradient(135deg, #0A2540 0%, #C9A961 100%);
}

/* ---------- 移动端专属元素：默认隐藏 ---------- */
.nav-toggle,
.nav-mobile,
.nav-mobile__mask {
  display: none;
}

/* ============================================================
   响应式适配 - 布局/导航
   ============================================================ */

/* ---------- 平板端（≤992px） ---------- */
@media (max-width: 992px) {
  :root {
    --header-height: 70px;
  }

  .nav {
    display: none;
  }

  /* 主题切换：移动端改紧凑样式 */
  .theme-switcher {
    margin-left: 12px;
  }

  .theme-switcher__btn {
    padding: 6px 10px;
    font-size: 12px;
  }

  .theme-switcher__btn-text {
    display: none;
  }

  /* 汉堡菜单按钮 */
  .nav-toggle {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 40px;
    height: 40px;
    padding: 8px;
    cursor: pointer;
    z-index: 1102;
  }

  .nav-toggle span {
    display: block;
    width: 100%;
    height: 2px;
    background-color: var(--color-text-primary);
    border-radius: 2px;
    transition: all var(--transition-base);
  }

  .nav-toggle.is-open span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }

  .nav-toggle.is-open span:nth-child(2) {
    opacity: 0;
  }

  .nav-toggle.is-open span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  /* 移动端导航抽屉 */
  .nav-mobile {
    display: block;
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background-color: #fff;
    box-shadow: -4px 0 20px rgba(0, 0, 0, 0.1);
    z-index: 1101;
    overflow-y: auto;
    transition: right var(--transition-base);
    padding: 90px 0 30px;
  }

  .nav-mobile.is-open {
    right: 0;
  }

  .nav-mobile__mask {
    display: block;
    position: fixed;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.4);
    z-index: 1100;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
  }

  .nav-mobile__mask.is-open {
    opacity: 1;
    visibility: visible;
  }

  .nav-mobile__item {
    border-bottom: 1px solid var(--color-border-light);
  }

  .nav-mobile__link {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 24px;
    font-size: var(--font-size-base);
    color: var(--color-text-regular);
    transition: all var(--transition-base);
  }

  .nav-mobile__link:hover,
  .nav-mobile__item.is-active > .nav-mobile__link {
    color: var(--color-primary);
    background-color: var(--color-primary-bg);
  }

  .nav-mobile__submenu {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    background-color: var(--color-bg-grey);
  }

  .nav-mobile__item.is-open > .nav-mobile__submenu {
    max-height: 500px;
  }

  .nav-mobile__sublink {
    display: block;
    padding: 12px 24px 12px 40px;
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    border-bottom: 1px solid var(--color-border-light);
  }

  .nav-mobile__sublink:hover,
  .nav-mobile__sublink.is-active {
    color: var(--color-primary);
    background-color: var(--color-primary-bg);
  }

  .nav-mobile__arrow {
    transition: transform var(--transition-base);
    font-size: 12px;
  }

  .nav-mobile__item.is-open > .nav-mobile__link .nav-mobile__arrow {
    transform: rotate(180deg);
  }
}

/* ---------- 手机端（≤768px） ---------- */
@media (max-width: 768px) {
  :root {
    --header-height: 60px;
  }

  .top-bar {
    display: none;
  }

  .container {
    padding: 0 16px;
  }

  .logo__mark {
    width: 40px;
    height: 40px;
    font-size: var(--font-size-base);
  }

  .logo__name {
    font-size: var(--font-size-lg);
  }

  .logo__name-en {
    font-size: 10px;
  }

  .page-banner {
    height: 200px;
  }

  .page-banner__title {
    font-size: 28px;
    margin-bottom: 8px;
    letter-spacing: 2px;
  }

  .page-banner__subtitle {
    font-size: 14px;
    letter-spacing: 1px;
  }

  .breadcrumb {
    padding: 12px 0;
    font-size: 12px;
  }

  .footer {
    padding-top: 40px;
  }

  .footer__top {
    flex-direction: column;
    gap: 28px;
    padding-bottom: 28px;
  }

  .footer__col--wide {
    flex: 1;
  }

  .footer__title {
    font-size: 16px;
    margin-bottom: 14px;
    padding-bottom: 10px;
  }

  .footer__contact-item {
    font-size: 12px;
    margin-bottom: 10px;
  }

  .footer__list {
    gap: 8px;
  }

  .footer__link {
    font-size: 12px;
  }

  .footer__bottom {
    padding: 16px 0;
    font-size: 11px;
  }

  .float-toolbar {
    right: 10px;
    bottom: 70px;
    transform: scale(0.85);
    transform-origin: bottom right;
  }

  .sidebar-layout {
    flex-direction: column;
    gap: 24px;
  }

  .sidebar-layout__sidebar {
    width: 100%;
  }

  .side-menu {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
  }

  .side-menu__title {
    width: 100%;
    padding-bottom: 12px;
    margin-bottom: 4px;
  }

  .side-menu__title-main {
    font-size: 18px;
  }

  .side-menu__list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    width: 100%;
  }

  .side-menu__item {
    flex: 1 1 auto;
    text-align: center;
    padding: 8px 12px;
    font-size: 13px;
  }
}

/* ---------- 小屏手机（≤480px） ---------- */
@media (max-width: 480px) {
  .nav-mobile {
    display: block;
    width: 80%;
    padding-top: 70px;
  }

  .logo__name-en {
    display: none;
  }

  .page-banner {
    height: 160px;
  }

  .page-banner__title {
    font-size: 22px;
    letter-spacing: 1px;
  }

  .page-banner__subtitle {
    font-size: 12px;
  }

  .float-toolbar {
    right: 6px;
    bottom: 60px;
    transform: scale(0.75);
  }
}

/* ---------- 超大屏（≥1400px） ---------- */
@media (min-width: 1400px) {
  :root {
    --container-width: 1360px;
  }
}