/* === 中赛新能微官网 — UI 组件样式 === */

/* ======== 导航栏 ======== */
.nav-bar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--color-navy-800);
  height: var(--nav-height);
  box-shadow: var(--shadow-md);
  transition: background var(--transition-base);
}

.nav-bar--scrolled {
  background: rgba(10, 31, 63, 0.97);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.nav-bar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.nav-bar__logo {
  display: flex;
  align-items: center;
  font-family: var(--font-family-display);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--color-white);
  letter-spacing: 0.5px;
}

.nav-bar__logo-img {
  height: 36px;
  width: auto;
}

/* 汉堡菜单按钮 */
.nav-bar__toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 44px;
  height: 44px;
  padding: 8px;
  z-index: 1001;
}

.nav-bar__toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-white);
  border-radius: 2px;
  transition: transform var(--transition-fast),
              opacity var(--transition-fast);
}

.nav-bar__toggle span + span {
  margin-top: 6px;
}

.nav-bar__toggle--open span:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}
.nav-bar__toggle--open span:nth-child(2) {
  opacity: 0;
}
.nav-bar__toggle--open span:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* 导航菜单 */
.nav-bar__menu {
  position: fixed;
  top: 0;
  right: 0;
  width: 260px;
  height: 100vh;
  height: 100dvh;
  background: var(--color-navy-900);
  padding: 80px var(--spacing-xl) var(--spacing-xl);
  transform: translateX(100%);
  transition: transform var(--transition-base);
  box-shadow: var(--shadow-xl);
  z-index: 999;
}

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

.nav-bar__link {
  display: block;
  padding: var(--spacing-md) 0;
  font-size: var(--font-size-lg);
  color: var(--color-gray-300);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  transition: color var(--transition-fast);
}

.nav-bar__link:hover,
.nav-bar__link.active {
  color: var(--color-gold-400);
}

/* 菜单遮罩 */
.nav-bar__overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 998;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-base);
}

.nav-bar__overlay--visible {
  opacity: 1;
  pointer-events: auto;
}

/* ======== Hero ======== */
.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-navy-950), var(--color-navy-800), var(--color-navy-700));
  overflow: hidden;
  margin-top: calc(-1 * var(--nav-height));
  padding-top: var(--nav-height);
}

.hero__bg-pattern {
  position: absolute;
  inset: 0;
  opacity: 0.06;
  background-image:
    radial-gradient(circle at 20% 30%, var(--color-navy-400) 1px, transparent 1px),
    radial-gradient(circle at 80% 70%, var(--color-navy-400) 1px, transparent 1px);
  background-size: 60px 60px;
}

.hero__content {
  position: relative;
  z-index: 2;
  text-align: center;
  color: var(--color-white);
  padding: var(--spacing-2xl) 0;
}

.hero__badge {
  display: inline-block;
  padding: 6px 20px;
  border: 1px solid var(--color-gold-400);
  border-radius: 20px;
  font-size: var(--font-size-sm);
  color: var(--color-gold-400);
  letter-spacing: 2px;
  margin-bottom: var(--spacing-xl);
}

.hero__title {
  font-family: var(--font-family-display);
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  margin-bottom: var(--spacing-md);
  letter-spacing: 1px;
}

.hero__title span {
  color: var(--color-gold-400);
}

.hero__subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-gray-300);
  margin-bottom: var(--spacing-2xl);
  line-height: var(--line-height-relaxed);
}

.hero__cta {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  align-items: center;
}

.hero__scroll-indicator {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  animation: bounce 2s infinite;
  opacity: 0.7;
}

.hero__scroll-indicator svg {
  width: 24px;
  height: 24px;
  stroke: var(--color-white);
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
  40% { transform: translateX(-50%) translateY(-10px); }
  60% { transform: translateX(-50%) translateY(-5px); }
}

/* ======== 按钮 ======== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 32px;
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  border-radius: var(--radius-sm);
  transition: all var(--transition-base);
  letter-spacing: 0.5px;
  min-width: 160px;
}

.btn--primary {
  background: var(--color-gold-400);
  color: var(--color-navy-900);
}

.btn--primary:hover {
  background: var(--color-gold-500);
  box-shadow: var(--shadow-gold);
}

.btn--outline {
  background: transparent;
  color: var(--color-gold-400);
  border: 1.5px solid var(--color-gold-400);
}

.btn--outline:hover {
  background: var(--color-gold-400);
  color: var(--color-navy-900);
}

.btn--white {
  background: var(--color-white);
  color: var(--color-navy-800);
}

.btn--white:hover {
  background: var(--color-gray-100);
  box-shadow: var(--shadow-lg);
}

/* ======== 统计卡片 ======== */
.stats {
  background: var(--color-white);
  padding: var(--spacing-2xl) 0;
}

.stats__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-lg);
}

.stat-card {
  text-align: center;
  padding: var(--spacing-xl) var(--spacing-md);
  border-radius: var(--radius-md);
  background: var(--color-gray-50);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.stat-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.stat-card__icon {
  width: 40px;
  height: 40px;
  margin: 0 auto var(--spacing-sm);
  color: var(--color-gold-400);
}

.stat-card__number {
  display: block;
  font-family: var(--font-family-display);
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-navy-800);
  line-height: var(--line-height-tight);
}

.stat-card__number span {
  color: var(--color-gold-400);
}

.stat-card__label {
  display: block;
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  margin-top: var(--spacing-xs);
}

/* ======== 品类卡片 ======== */
.category-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-lg);
}

.category-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  transition: transform var(--transition-base),
              box-shadow var(--transition-base),
              border-color var(--transition-base);
  cursor: pointer;
}

.category-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-gold);
  border-color: var(--color-gold-400);
}

.category-card__icon {
  width: 48px;
  height: 48px;
  margin-bottom: var(--spacing-md);
  color: var(--color-navy-600);
}

.category-card__title {
  font-family: var(--font-family-display);
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  color: var(--color-navy-800);
  margin-bottom: var(--spacing-sm);
}

.category-card__desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  line-height: var(--line-height-relaxed);
}

/* ======== 筛选选项卡 ======== */
.filter-tabs {
  display: flex;
  gap: var(--spacing-sm);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  padding: 0 0 var(--spacing-md);
  margin-bottom: var(--spacing-xl);
  scrollbar-width: none;
}

.filter-tabs::-webkit-scrollbar {
  display: none;
}

.filter-tab {
  flex-shrink: 0;
  padding: 10px 20px;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-gray-600);
  background: var(--color-gray-100);
  border-radius: 24px;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.filter-tab:hover,
.filter-tab.active {
  background: var(--color-navy-800);
  color: var(--color-gold-400);
}

/* ======== 产品卡片 ======== */
.product-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-lg);
}

.product-card {
  background: var(--color-white);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  transition: transform var(--transition-base),
              box-shadow var(--transition-base);
}

.product-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.product-card__image {
  aspect-ratio: 16 / 10;
  background: linear-gradient(135deg, var(--color-gray-100), var(--color-gray-200));
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-gray-400);
  overflow: hidden;
}

.product-card__image picture,
.product-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.product-card__image svg {
  width: 64px;
  height: 64px;
  opacity: 0.5;
}

.product-card__body {
  padding: var(--spacing-lg);
}

.product-card__title {
  font-family: var(--font-family-display);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--color-navy-800);
  margin-bottom: var(--spacing-sm);
}

.product-card__specs {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  line-height: var(--line-height-relaxed);
}

.product-card__specs dt {
  display: inline;
  font-weight: var(--font-weight-medium);
  color: var(--color-gray-700);
}

.product-card__specs dt::after {
  content: '：';
}

.product-card__specs dd {
  display: inline;
  margin-right: var(--spacing-md);
}

/* ======== 案例卡片 ======== */
.cases-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-lg);
}

.case-card {
  background: var(--color-white);
  border-radius: var(--radius-md);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-sm);
  border-left: 3px solid transparent;
  transition: all var(--transition-base);
}

.case-card:hover {
  border-left-color: var(--color-navy-600);
  box-shadow: var(--shadow-md);
  transform: translateX(4px);
}

.case-card__icon {
  width: 44px;
  height: 44px;
  margin-bottom: var(--spacing-md);
  color: var(--color-navy-600);
}

.case-card__title {
  font-family: var(--font-family-display);
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  color: var(--color-navy-800);
  margin-bottom: var(--spacing-sm);
}

.case-card__desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  line-height: var(--line-height-relaxed);
}

/* ======== 时间线 ======== */
.timeline {
  position: relative;
  padding: var(--spacing-lg) 0;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 18px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--color-gold-400), var(--color-navy-600));
}

.timeline__item {
  position: relative;
  padding-left: 52px;
  margin-bottom: var(--spacing-xl);
}

.timeline__item:last-child {
  margin-bottom: 0;
}

.timeline__dot {
  position: absolute;
  left: 10px;
  top: 4px;
  width: 18px;
  height: 18px;
  background: var(--color-gold-400);
  border-radius: 50%;
  border: 3px solid var(--color-white);
  box-shadow: var(--shadow-sm);
}

.timeline__year {
  font-family: var(--font-family-display);
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-navy-800);
  margin-bottom: var(--spacing-xs);
}

.timeline__text {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  line-height: var(--line-height-relaxed);
}

/* ======== 资质证书网格 ======== */
.certificate-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-md);
}

.certificate-item {
  aspect-ratio: 3 / 4;
  background: var(--color-gray-100);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
  position: relative;
  overflow: hidden;
}

.certificate-item:hover {
  transform: scale(1.03);
  box-shadow: var(--shadow-md);
}

.certificate-item__icon {
  width: 48px;
  height: 48px;
  color: var(--color-gray-400);
}

.certificate-item__label {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: var(--spacing-sm);
  background: rgba(10, 31, 63, 0.85);
  color: var(--color-white);
  font-size: var(--font-size-xs);
  text-align: center;
}

/* ======== 合作伙伴卡片 ======== */
.partner-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: var(--spacing-2xl);
  text-align: center;
  box-shadow: var(--shadow-sm);
  border: 2px solid var(--color-gold-200);
}

.partner-card__logo {
  font-family: var(--font-family-display);
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-navy-800);
  margin-bottom: var(--spacing-sm);
}

.partner-card__name {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--color-navy-800);
  margin-bottom: var(--spacing-xs);
}

.partner-card__role {
  display: inline-block;
  padding: 4px 16px;
  background: var(--color-gold-100);
  color: var(--color-gold-600);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  border-radius: 12px;
  margin-bottom: var(--spacing-md);
}

.partner-card__desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  line-height: var(--line-height-relaxed);
}

/* ======== Footer ======== */
.footer {
  background: var(--color-navy-950);
  color: var(--color-gray-300);
  padding: var(--spacing-2xl) 0 0;
}

.footer__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-2xl);
}

.footer__col-title {
  font-family: var(--font-family-display);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--color-white);
  margin-bottom: var(--spacing-md);
  padding-bottom: var(--spacing-sm);
  border-bottom: 2px solid var(--color-gold-400);
  display: inline-block;
}

.footer__text {
  font-size: var(--font-size-sm);
  line-height: var(--line-height-relaxed);
  color: var(--color-gray-400);
}

.footer__links li {
  margin-bottom: var(--spacing-sm);
}

.footer__links a {
  font-size: var(--font-size-sm);
  color: var(--color-gray-400);
  transition: color var(--transition-fast);
}

.footer__links a:hover {
  color: var(--color-gold-400);
}

.footer__contact-item {
  display: flex;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-sm);
  font-size: var(--font-size-sm);
  color: var(--color-gray-400);
}

.footer__contact-item svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  margin-top: 2px;
  color: var(--color-gold-400);
}

.footer__bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: var(--spacing-lg) 0;
  text-align: center;
  font-size: var(--font-size-xs);
  color: var(--color-gray-500);
}

/* ======== 灯箱 ======== */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 2000;
  background: rgba(0, 0, 0, 0.9);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-base);
}

.lightbox--visible {
  opacity: 1;
  pointer-events: auto;
}

.lightbox__image {
  max-width: 90vw;
  max-height: 85vh;
  border-radius: var(--radius-sm);
}

.lightbox__close {
  position: absolute;
  top: 20px;
  right: 20px;
  width: 44px;
  height: 44px;
  color: var(--color-white);
  font-size: 28px;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ======== 返回顶部 ======== */
.back-to-top {
  position: fixed;
  bottom: 80px;
  right: 20px;
  width: 44px;
  height: 44px;
  background: var(--color-navy-800);
  color: var(--color-gold-400);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  box-shadow: var(--shadow-md);
  z-index: 900;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-base), transform var(--transition-base);
}

.back-to-top--visible {
  opacity: 1;
  pointer-events: auto;
}

.back-to-top:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

/* ======== 合作伙伴网格（服务案例） ======== */
.partner-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-lg);
}

.partner-item {
  background: var(--color-white);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.partner-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.partner-item__logo {
  aspect-ratio: 4 / 3;
  background: var(--color-gray-50);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  border-bottom: 2px solid var(--color-gray-100);
}

.partner-item__logo picture,
.partner-item__logo img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: 2px;/*var(--spacing-md);*/
}

.partner-item__name {
  font-family: var(--font-family-display);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-navy-800);
  text-align: center;
  padding: var(--spacing-md) var(--spacing-md) 0;
}

.partner-item__field {
  font-size: var(--font-size-xs);
  color: var(--color-gold-500);
  text-align: center;
  padding: var(--spacing-xs) var(--spacing-md) var(--spacing-md);
}

/* ======== 动画初始状态 ======== */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}

/* 延迟递进 */
.animate-stagger > * {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.animate-stagger > *.visible {
  opacity: 1;
  transform: translateY(0);
}