/* ========================================
   布局样式：header / footer / nav / 容器
   ======================================== */

/* === 顶部公告栏 === */
.notice-bar {
  height: var(--notice-height);
  background-color: var(--color-navy);
  color: rgba(255,255,255,0.85);
  font-size: var(--font-size-sm);
  display: flex;
  align-items: center;
  overflow: hidden;
  position: relative;
  z-index: var(--z-fixed);
}

.notice-bar__inner {
  display: flex;
  align-items: center;
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-6);
  gap: var(--space-4);
}

.notice-bar__label {
  flex-shrink: 0;
  background: var(--color-red);
  color: #fff;
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-bold);
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  letter-spacing: 0.05em;
}

.notice-bar__track {
  flex: 1;
  overflow: hidden;
  position: relative;
}

.notice-bar__scroll {
  display: flex;
  gap: var(--space-16);
  animation: noticeScroll 30s linear infinite;
  white-space: nowrap;
}

.notice-bar__scroll:hover {
  animation-play-state: paused;
}

.notice-bar__item {
  flex-shrink: 0;
  color: rgba(255,255,255,0.85);
  transition: color var(--transition-fast);
  cursor: pointer;
}

.notice-bar__item:hover {
  color: #fff;
}

.notice-bar__item::before {
  content: "◆ ";
  color: var(--color-blue-mid);
  font-size: 8px;
}

@keyframes noticeScroll {
  0%   { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

/* === 固定导航 === */
.site-header {
  position: sticky;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: rgba(255,255,255,0.97);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border-light);
  z-index: var(--z-fixed);
  transition: background var(--transition-base), box-shadow var(--transition-base);
}

.site-header.scrolled {
  background: rgba(255,255,255,0.99);
  box-shadow: var(--shadow-md);
}

.site-header.at-top {
  background: transparent;
  border-bottom-color: rgba(255,255,255,0.15);
}

.site-header.at-top .site-nav__link {
  color: rgba(255,255,255,0.9);
}

.site-header.at-top .site-nav__link:hover,
.site-header.at-top .site-nav__link.active {
  color: #fff;
}

.site-header.at-top .logo__text {
  color: #fff;
}

.site-header.at-top .logo__sub {
  color: rgba(255,255,255,0.7);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 var(--space-6);
  gap: var(--space-4);
}

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

.logo__icon {
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, var(--color-navy) 0%, var(--color-blue) 100%);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  letter-spacing: -1px;
  flex-shrink: 0;
}

.logo__text-group {
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.logo__text {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-bold);
  color: var(--color-navy);
  line-height: 1.3;
  white-space: nowrap;
}

.logo__sub {
  font-size: 11px;
  color: var(--color-text-muted);
  line-height: 1.2;
  white-space: nowrap;
}

/* --- 主导航 --- */
.site-nav {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: 0;
  list-style: none;
}

.site-nav__item {
  position: relative;
}

.site-nav__link {
  display: flex;
  align-items: center;
  height: var(--header-height);
  padding: 0 var(--space-4);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-sec);
  text-decoration: none;
  white-space: nowrap;
  border-bottom: 2px solid transparent;
  transition: color var(--transition-base), border-color var(--transition-base);
}

.site-nav__link:hover,
.site-nav__link.active {
  color: var(--color-blue);
  border-bottom-color: var(--color-blue);
}

/* --- 报名 CTA --- */
.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-5);
  background: var(--color-red);
  color: #fff !important;
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  text-decoration: none;
  transition: background var(--transition-base), transform var(--transition-fast), box-shadow var(--transition-base);
  box-shadow: var(--shadow-red);
  flex-shrink: 0;
  border-bottom: none !important;
}

.nav-cta:hover {
  background: var(--color-red-hover);
  transform: translateY(-1px);
  box-shadow: 0 6px 24px rgba(229,37,46,0.40);
  color: #fff !important;
}

/* --- 移动端汉堡菜单 --- */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-2);
  cursor: pointer;
  background: none;
  border: none;
  border-radius: var(--radius-sm);
  transition: background var(--transition-fast);
}

.hamburger:hover {
  background: var(--color-blue-light);
}

.hamburger__line {
  width: 22px;
  height: 2px;
  background: var(--color-navy);
  border-radius: var(--radius-full);
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.hamburger.open .hamburger__line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.hamburger.open .hamburger__line:nth-child(2) {
  opacity: 0;
}
.hamburger.open .hamburger__line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* --- 移动端抽屉 --- */
.mobile-nav {
  display: none;
  position: fixed;
  top: var(--header-total);
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(10,31,92,0.95);
  backdrop-filter: blur(10px);
  z-index: calc(var(--z-fixed) - 1);
  padding: var(--space-8) var(--space-6);
  flex-direction: column;
  gap: var(--space-2);
  overflow-y: auto;
  transform: translateX(100%);
  transition: transform var(--transition-base);
}

.mobile-nav.open {
  transform: translateX(0);
}

.mobile-nav__link {
  display: flex;
  align-items: center;
  padding: var(--space-4) var(--space-5);
  color: rgba(255,255,255,0.85);
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-medium);
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: background var(--transition-fast), color var(--transition-fast);
  border-left: 3px solid transparent;
}

.mobile-nav__link:hover,
.mobile-nav__link.active {
  background: rgba(255,255,255,0.08);
  color: #fff;
  border-left-color: var(--color-blue-mid);
}

.mobile-nav__cta {
  margin-top: var(--space-4);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4) var(--space-8);
  background: var(--color-red);
  color: #fff;
  border-radius: var(--radius-full);
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-bold);
  text-decoration: none;
  box-shadow: var(--shadow-red);
}

/* === 容器系统 === */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.container--wide {
  max-width: var(--container-wide);
}

.container--narrow {
  max-width: 800px;
}

/* === 区块通用样式 === */
.section {
  padding: var(--space-20) 0;
}

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

.section--navy {
  background-color: var(--color-navy);
  color: #fff;
}

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

.section-header {
  text-align: center;
  margin-bottom: var(--space-12);
}

.section-header__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-blue);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-4);
}

.section-header__eyebrow::before,
.section-header__eyebrow::after {
  content: "";
  width: 24px;
  height: 2px;
  background: var(--color-blue);
  border-radius: var(--radius-full);
}

.section-header__title {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-navy);
  margin-bottom: var(--space-4);
}

.section--navy .section-header__title,
.section--dark .section-header__title {
  color: #fff;
}

.section-header__subtitle {
  font-size: var(--font-size-md);
  color: var(--color-text-muted);
  max-width: 600px;
  margin: 0 auto;
}

.section--navy .section-header__subtitle,
.section--dark .section-header__subtitle {
  color: rgba(255,255,255,0.65);
}

/* === 面包屑 === */
.breadcrumb {
  background: var(--color-bg-gray);
  border-bottom: 1px solid var(--color-border-light);
  padding: var(--space-3) 0;
}

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

.breadcrumb__item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.breadcrumb__item a {
  color: var(--color-text-muted);
}

.breadcrumb__item a:hover {
  color: var(--color-blue);
}

.breadcrumb__item:not(:last-child)::after {
  content: "›";
  color: var(--color-border);
}

.breadcrumb__item.current {
  color: var(--color-text-sec);
}

/* === 页面英雄区（内页） === */
.page-hero {
  background: linear-gradient(135deg, var(--color-navy) 0%, var(--color-blue) 100%);
  padding: var(--space-16) 0 var(--space-12);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
}

.page-hero__title {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  color: #fff;
  margin-bottom: var(--space-3);
  position: relative;
}

.page-hero__subtitle {
  font-size: var(--font-size-md);
  color: rgba(255,255,255,0.7);
  position: relative;
}

/* === 页脚 === */
.site-footer {
  background: #0D1529;
  color: rgba(255,255,255,0.65);
  padding-top: var(--space-16);
}

.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--space-12);
  padding-bottom: var(--space-12);
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.footer__col-title {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  color: #fff;
  margin-bottom: var(--space-6);
  padding-bottom: var(--space-3);
  border-bottom: 2px solid var(--color-blue);
  display: inline-block;
}

.footer__about p {
  font-size: var(--font-size-sm);
  line-height: var(--line-height-base);
  color: rgba(255,255,255,0.55);
  margin-bottom: var(--space-4);
}

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

.footer__links a {
  font-size: var(--font-size-sm);
  color: rgba(255,255,255,0.55);
  text-decoration: none;
  transition: color var(--transition-fast);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.footer__links a::before {
  content: "›";
  color: var(--color-blue-mid);
}

.footer__links a:hover {
  color: #fff;
}

.footer__contact-item {
  display: flex;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
  font-size: var(--font-size-sm);
  line-height: var(--line-height-base);
}

.footer__contact-icon {
  width: 18px;
  flex-shrink: 0;
  color: var(--color-blue-mid);
  margin-top: 2px;
  font-style: normal;
}

.footer__bottom {
  padding: var(--space-5) 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.footer__bottom p {
  font-size: var(--font-size-xs);
  color: rgba(255,255,255,0.35);
  margin-bottom: 0;
}

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

.footer__icp a {
  font-size: var(--font-size-xs);
  color: rgba(255,255,255,0.35);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer__icp a:hover {
  color: rgba(255,255,255,0.7);
}

/* === 回到顶部按钮 === */
.back-to-top {
  position: fixed;
  bottom: var(--space-8);
  right: var(--space-8);
  width: 44px;
  height: 44px;
  background: var(--color-blue);
  color: #fff;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-lg);
  cursor: pointer;
  box-shadow: var(--shadow-blue);
  z-index: var(--z-fixed);
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--transition-base), transform var(--transition-base), background var(--transition-fast);
  border: none;
}

.back-to-top.visible {
  opacity: 1;
  transform: translateY(0);
}

.back-to-top:hover {
  background: var(--color-blue-hover);
  transform: translateY(-2px);
}

/* === 响应式 === */
@media (max-width: 1024px) {
  .site-nav__link {
    padding: 0 var(--space-3);
    font-size: 13px;
  }
}

@media (max-width: 900px) {
  .site-nav,
  .nav-cta {
    display: none;
  }

  .hamburger {
    display: flex;
  }

  .mobile-nav {
    display: flex;
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: 60px;
    --notice-height: 32px;
    --header-total: 92px;
  }

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

  .footer__bottom {
    flex-direction: column;
    align-items: flex-start;
  }

  .section {
    padding: var(--space-12) 0;
  }

  .section-header {
    margin-bottom: var(--space-8);
  }

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

  .back-to-top {
    bottom: var(--space-5);
    right: var(--space-5);
  }
}

@media (max-width: 480px) {
  .notice-bar {
    display: none;
  }

  :root {
    --header-total: var(--header-height);
  }

  .container {
    padding: 0 var(--space-4);
  }
}