/* ==========================================================================
   首页样式 | home.css
   依赖: variable.css / base.css
   ========================================================================== */

.container {
  width: min(100% - 32px, var(--container-width));
  margin-inline: auto;
}

/* ---------- 顶部信息栏 ---------- */
.site-header {
  position: relative;
  z-index: 100;
  background: var(--color-bg-white);
  border-bottom: 1px solid rgba(28, 116, 187, 0.08);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 24px;
  min-height: var(--header-height);
}

.brand {
  flex-shrink: 0;
  display: flex;
  align-items: center;
}

.brand-logo {
  height: 52px;
  width: auto;
  object-fit: contain;
}

.header-slogan {
  flex: 1;
  margin: 0;
  font-size: 0.95rem;
  letter-spacing: 0.04em;
  color: var(--color-text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.header-contact {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 2px;
  flex-shrink: 0;
}

.contact-label {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  letter-spacing: 0.06em;
}

.contact-phone {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--color-primary);
  font-size: 1.25rem;
  line-height: 1.2;
}

.contact-phone:hover {
  color: var(--color-primary-dark);
}

.contact-phone strong {
  font-weight: 700;
  letter-spacing: 0.02em;
  font-variant-numeric: tabular-nums;
}

.icon-phone {
  width: 20px;
  height: 20px;
}

/* 汉堡按钮 */
.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  border-radius: var(--radius-md);
  background: var(--color-primary-lighter);
  margin-left: auto;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--color-primary);
  border-radius: 2px;
  transition: var(--transition);
}

.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);
}

/* ---------- 主导航 ---------- */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 90;
  background: linear-gradient(180deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  box-shadow: 0 4px 16px rgba(15, 74, 125, 0.22);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  min-height: var(--nav-height);
}

.nav-menu {
  display: flex;
  align-items: stretch;
  flex: 1;
  min-width: 0;
}

.nav-menu > .nav-item {
  position: relative;
  flex: 1;
  min-width: 0;
}

.nav-menu > .nav-item > a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
  width: 100%;
  height: var(--nav-height);
  padding: 0 10px;
  color: rgba(255, 255, 255, 0.92);
  font-size: 1.0625rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  white-space: nowrap;
  position: relative;
  transition: background var(--transition), color var(--transition);
}

.nav-menu > .nav-item > a::after {
  content: "";
  position: absolute;
  left: 18%;
  right: 18%;
  bottom: 0;
  height: 3px;
  border-radius: 3px 3px 0 0;
  background: transparent;
  transition: background var(--transition);
}

.nav-menu > .nav-item > a:hover,
.nav-menu > .nav-item.is-active > a {
  color: #fff;
  background: rgba(255, 255, 255, 0.12);
}

.nav-menu > .nav-item.is-active > a::after,
.nav-menu > .nav-item > a:hover::after {
  background: #fff;
}

.icon-chevron {
  width: 12px;
  height: 12px;
  opacity: 0.85;
  transition: transform var(--transition);
}

.has-dropdown:hover .icon-chevron,
.has-dropdown:focus-within .icon-chevron {
  transform: rotate(180deg);
}

/* 下拉菜单 */
.dropdown-menu {
  position: absolute;
  top: calc(100% + 0px);
  left: 0;
  min-width: 320px;
  padding: 10px;
  background: var(--color-bg-white);
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(6px);
  transition: opacity var(--transition), transform var(--transition), visibility var(--transition);
  z-index: 95;
}

.has-dropdown:hover .dropdown-menu,
.has-dropdown:focus-within .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-menu a {
  display: block;
  padding: 12px 14px;
  color: var(--color-text-regular);
  font-size: 0.9rem;
  line-height: 1.45;
  border-radius: var(--radius-sm);
  transition: background var(--transition), color var(--transition);
}

.dropdown-menu a:hover {
  background: var(--color-primary-lighter);
  color: var(--color-primary-dark);
}

/* 导航搜索 */
.nav-search {
  display: flex;
  align-items: center;
  flex-shrink: 0;
  width: 220px;
  height: 36px;
  padding: 0 4px 0 14px;
  background: rgba(255, 255, 255, 0.14);
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: 999px;
  transition: background var(--transition), border-color var(--transition), width var(--transition);
}

.nav-search:focus-within {
  width: 260px;
  background: rgba(255, 255, 255, 0.22);
  border-color: rgba(255, 255, 255, 0.55);
}

.nav-search input {
  flex: 1;
  min-width: 0;
  height: 100%;
  color: #fff;
  font-size: 0.875rem;
}

.nav-search input::placeholder {
  color: rgba(255, 255, 255, 0.7);
}

.nav-search button {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  color: #fff;
  flex-shrink: 0;
}

.nav-search button:hover {
  background: rgba(255, 255, 255, 0.18);
}

.nav-search button svg {
  width: 16px;
  height: 16px;
}

.nav-backdrop {
  display: none;
}

/* ---------- 首屏 Banner ---------- */
.hero-banner {
  position: relative;
  height: clamp(360px, calc(100vh - var(--header-height) - var(--nav-height) - 120px), 520px);
  overflow: hidden;
  background: var(--color-primary-darker);
}

.banner-track {
  position: relative;
  width: 100%;
  height: 100%;
}

.banner-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.7s ease, visibility 0.7s ease;
  pointer-events: none;
}

.banner-slide.is-active {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  z-index: 1;
}

.banner-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  transform: scale(1.04);
  transition: transform 6.5s ease-out;
}

.banner-slide.is-active .banner-bg {
  transform: scale(1);
}

.banner-overlay {
  position: absolute;
  inset: 0;
  background: var(--gradient-hero);
}

.banner-content {
  position: relative;
  z-index: 2;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
  max-width: 780px;
  margin-left: max(16px, calc((100% - var(--container-width)) / 2));
  margin-right: auto;
  /* 为两侧箭头留出空间，避免文字被挡住 */
  padding-block: 48px;
  padding-inline: 72px;
  color: #fff;
}

.banner-eyebrow {
  margin: 0 0 14px;
  font-size: 0.9rem;
  letter-spacing: 0.12em;
  color: rgba(255, 255, 255, 0.88);
  opacity: 0;
  transform: translateY(18px);
}

.banner-title {
  margin: 0 0 16px;
  color: #fff;
  font-size: clamp(1.75rem, 3.6vw, 2.75rem);
  font-weight: 700;
  line-height: 1.28;
  letter-spacing: 0.02em;
  text-shadow: 0 2px 24px rgba(0, 0, 0, 0.25);
  opacity: 0;
  transform: translateY(22px);
}

.banner-desc {
  margin: 0 0 28px;
  max-width: 34em;
  font-size: clamp(0.95rem, 1.5vw, 1.1rem);
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.9);
  opacity: 0;
  transform: translateY(22px);
}

.banner-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  opacity: 0;
  transform: translateY(22px);
}

.banner-slide.is-active .banner-eyebrow,
.banner-slide.is-active .banner-title,
.banner-slide.is-active .banner-desc,
.banner-slide.is-active .banner-actions {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

.banner-slide.is-active .banner-eyebrow { transition-delay: 0.12s; }
.banner-slide.is-active .banner-title { transition-delay: 0.22s; }
.banner-slide.is-active .banner-desc { transition-delay: 0.32s; }
.banner-slide.is-active .banner-actions { transition-delay: 0.42s; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 22px;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  transition: background var(--transition), color var(--transition), border-color var(--transition), transform 0.2s ease;
}

.btn:active {
  transform: translateY(1px);
}

.btn-primary {
  color: var(--color-primary-darker);
  background: #fff;
}

.btn-primary:hover {
  color: var(--color-primary-darker);
  background: #f0f7fc;
}

.btn-ghost {
  color: #fff;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.65);
}

.btn-ghost:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.12);
  border-color: #fff;
}

/* 箭头 */
.banner-arrow {
  position: absolute;
  top: 50%;
  z-index: 5;
  transform: translateY(-50%);
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  color: #fff;
  background: rgba(15, 74, 125, 0.35);
  border: 1px solid rgba(255, 255, 255, 0.35);
  backdrop-filter: blur(6px);
  transition: background var(--transition), border-color var(--transition);
}

.banner-arrow:hover {
  background: rgba(28, 116, 187, 0.85);
  border-color: rgba(255, 255, 255, 0.7);
}

.banner-arrow svg {
  width: 22px;
  height: 22px;
}

.banner-prev { left: 20px; }
.banner-next { right: 20px; }

/* 指示点 */
.banner-dots {
  position: absolute;
  left: 50%;
  bottom: 28px;
  z-index: 5;
  transform: translateX(-50%);
  display: flex;
  gap: 10px;
}

.banner-dots button {
  width: 10px;
  height: 10px;
  padding: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.4);
  border: 1px solid rgba(255, 255, 255, 0.55);
  transition: width var(--transition), background var(--transition), border-radius var(--transition);
}

.banner-dots button.is-active {
  width: 28px;
  border-radius: 999px;
  background: #fff;
  border-color: #fff;
}

/* 进度条 */
.banner-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 5;
  height: 3px;
  background: rgba(255, 255, 255, 0.15);
}

.banner-progress span {
  display: block;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, #fff, rgba(255, 255, 255, 0.7));
}

.banner-progress.is-running span {
  animation: bannerProgress 5.5s linear forwards;
}

@keyframes bannerProgress {
  from { width: 0; }
  to { width: 100%; }
}

/* ---------- 右侧悬浮栏 ---------- */
.float-dock {
  position: fixed;
  right: 0;
  top: 50%;
  z-index: 80;
  transform: translateY(-50%);
  display: flex;
  flex-direction: column;
  border-radius: var(--radius-md) 0 0 var(--radius-md);
  background: var(--color-primary);
  box-shadow: var(--shadow-md);
}

.float-dock a {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  width: 56px;
  height: 64px;
  color: #fff;
  font-size: 0.7rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.18);
  transition: background var(--transition);
}

.float-dock a:last-child {
  border-bottom: none;
  border-radius: 0 0 0 var(--radius-md);
}

.float-dock a:first-child {
  border-radius: var(--radius-md) 0 0 0;
}

.float-dock a:hover {
  color: #fff;
  background: var(--color-primary-dark);
}

.float-dock__tip {
  position: absolute;
  right: calc(100% + 8px);
  top: 50%;
  transform: translateY(-50%) translateX(6px);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  background: var(--color-primary-dark);
  color: #fff;
  font-size: 0.8rem;
  font-style: normal;
  white-space: nowrap;
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity var(--transition), transform var(--transition), visibility var(--transition);
}

.float-dock a:hover .float-dock__tip,
.float-dock a:focus-visible .float-dock__tip {
  opacity: 1;
  visibility: visible;
  transform: translateY(-50%) translateX(0);
}

.float-dock svg {
  width: 20px;
  height: 20px;
}

/* ==========================================================================
   平板 ≤ 992px
   ========================================================================== */
@media (max-width: 992px) {
  :root {
    --header-height: 64px;
    --nav-height: 52px;
  }

  .header-slogan {
    display: none;
  }

  .brand-logo {
    height: 46px;
  }

  .contact-phone {
    font-size: 1.1rem;
  }

  .nav-menu > .nav-item > a {
    padding: 0 12px;
    font-size: 0.9rem;
  }

  .nav-search {
    width: 170px;
  }

  .nav-search:focus-within {
    width: 190px;
  }

  .dropdown-menu {
    min-width: 280px;
  }

  .banner-content {
    max-width: 92%;
    padding-inline: 64px;
  }

  .banner-prev { left: 12px; }
  .banner-next { right: 12px; }

  .float-dock a {
    width: 50px;
    height: 56px;
  }
}

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

  .header-inner {
    gap: 12px;
    min-height: var(--header-height);
  }

  .brand-logo {
    height: 40px;
  }

  .header-contact {
    margin-left: auto;
    margin-right: 4px;
  }

  .contact-label {
    display: none;
  }

  .contact-phone {
    font-size: 0.95rem;
  }

  .contact-phone strong {
    font-size: 0.95rem;
  }

  .icon-phone {
    width: 16px;
    height: 16px;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: auto;
    width: min(86vw, 320px);
    height: calc(100vh - var(--header-height));
    z-index: 120;
    background: var(--color-bg-white);
    box-shadow: none;
    transform: translateX(-105%);
    transition: transform 0.3s ease;
    overflow-y: auto;
  }

  .site-nav.is-open {
    transform: translateX(0);
    box-shadow: var(--shadow-lg);
  }

  .nav-inner {
    flex-direction: column;
    align-items: stretch;
    gap: 16px;
    padding: 16px 0 32px;
    min-height: auto;
  }

  .nav-menu {
    flex-direction: column;
    gap: 0;
  }

  .nav-menu > .nav-item > a {
    height: auto;
    width: 100%;
    padding: 14px 20px;
    justify-content: flex-start;
    color: var(--color-text-regular);
    font-size: 1rem;
    background: transparent;
  }

  .nav-menu > .nav-item > a::after {
    display: none;
  }

  .nav-menu > .nav-item > a:hover,
  .nav-menu > .nav-item.is-active > a {
    color: var(--color-primary);
    background: var(--color-primary-lighter);
  }

  .icon-chevron {
    margin-left: auto;
    color: var(--color-text-muted);
  }

  .dropdown-menu {
    position: static;
    min-width: 0;
    padding: 0 12px 8px 28px;
    background: transparent;
    box-shadow: none;
    border-radius: 0;
    opacity: 1;
    visibility: visible;
    transform: none;
    display: none;
  }

  .has-dropdown.is-open .dropdown-menu {
    display: block;
  }

  .has-dropdown.is-open .icon-chevron {
    transform: rotate(180deg);
    color: var(--color-primary);
  }

  .dropdown-menu a {
    padding: 10px 12px;
    font-size: 0.875rem;
    color: var(--color-text-secondary);
  }

  .nav-search {
    width: calc(100% - 32px);
    margin: 0 16px;
    height: 42px;
    background: var(--color-bg-gray);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-md);
  }

  .nav-search:focus-within {
    width: calc(100% - 32px);
    background: #fff;
    border-color: var(--color-primary-light);
  }

  .nav-search input {
    color: var(--color-text-regular);
  }

  .nav-search input::placeholder {
    color: var(--color-text-muted);
  }

  .nav-search button {
    color: var(--color-primary);
  }

  .nav-backdrop {
    display: block;
    position: fixed;
    inset: 0;
    z-index: 110;
    background: rgba(10, 30, 50, 0.45);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
  }

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

  .hero-banner {
    height: clamp(300px, 48vh, 420px);
  }

  .banner-content {
    margin-left: 16px;
    margin-right: 16px;
    width: auto;
    max-width: none;
    padding-block: 36px;
    padding-inline: 52px;
    align-items: stretch;
  }

  .banner-actions {
    width: 100%;
  }

  .banner-actions .btn {
    flex: 1;
    min-width: 0;
  }

  .banner-arrow {
    width: 40px;
    height: 40px;
  }

  .banner-prev { left: 8px; }
  .banner-next { right: 8px; }

  .banner-dots {
    bottom: 20px;
  }

  .float-dock {
    display: none;
  }
}

/* ==========================================================================
   超小屏 ≤ 480px
   ========================================================================== */
@media (max-width: 480px) {
  .container {
    width: min(100% - 24px, var(--container-width));
  }

  .contact-phone strong {
    font-size: 0.875rem;
  }

  .banner-title {
    font-size: 1.5rem;
  }

  .banner-desc {
    font-size: 0.9rem;
    margin-bottom: 20px;
  }

  .banner-actions {
    flex-direction: column;
  }

  .banner-content {
    padding-inline: 0;
  }

  .banner-arrow {
    display: none;
  }
}

/* 减少动效偏好 */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .banner-bg {
    transform: none !important;
  }
}

.products-section {
  padding: 64px 0 80px;
  background:
    linear-gradient(180deg, #ffffff 0%, #f7fafc 48%, #ffffff 100%);
}

/* ---------- 区块标题 ---------- */
.section-heading {
  text-align: center;
  margin-bottom: 40px;
}

.section-heading__title {
  margin: 0;
  font-size: clamp(1.6rem, 2.4vw, 2rem);
  font-weight: 700;
  color: var(--color-text-primary);
  letter-spacing: 0.06em;
}

.section-heading__en {
  margin: 8px 0 0;
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.22em;
  color: var(--color-text-muted);
  text-transform: uppercase;
}

.section-heading__line {
  display: block;
  width: 100%;
  max-width: 280px;
  height: 2px;
  margin: 18px auto 0;
  background: linear-gradient(
    90deg,
    transparent 0%,
    var(--color-border-light) 18%,
    var(--color-border-light) 82%,
    transparent 100%
  );
  position: relative;
}

.section-heading__line::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 56px;
  height: 3px;
  border-radius: 2px;
  background: var(--color-primary);
  transform: translate(-50%, -50%);
}

/* ---------- 左右布局 ---------- */
.products-layout {
  display: grid;
  grid-template-columns: 240px minmax(0, 1fr);
  gap: 28px;
  align-items: start;
}

/* ---------- 左侧分类 ---------- */
.products-sidebar {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.products-cat {
  background: var(--color-bg-white);
  border-radius: var(--radius-sm);
  overflow: hidden;
  box-shadow: 0 1px 0 rgba(28, 116, 187, 0.06);
}

.products-cat__btn {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  min-height: 48px;
  padding: 12px 14px;
  text-align: left;
  color: #fff;
  font-size: 0.92rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  background: var(--color-primary);
  transition: background var(--transition);
}

.products-cat__btn:hover {
  background: var(--color-primary-dark);
}

.products-cat.is-active .products-cat__btn {
  background: var(--color-primary-darker);
}

.products-cat__arrow {
  width: 12px;
  height: 12px;
  flex-shrink: 0;
  opacity: 0.9;
  transition: transform var(--transition);
}

.products-cat.is-open .products-cat__arrow {
  transform: rotate(0deg);
}

.products-cat:not(.is-open) .products-cat__arrow {
  transform: rotate(-90deg);
}

.products-cat__subs {
  display: none;
  padding: 6px 0;
  background: #f3f5f7;
  border: 1px solid var(--color-border-light);
  border-top: none;
}

.products-cat.is-open .products-cat__subs {
  display: block;
}

.products-cat__subs a {
  display: block;
  padding: 10px 16px 10px 34px;
  color: var(--color-text-regular);
  font-size: 0.875rem;
  transition: color var(--transition), background var(--transition);
}

.products-cat__subs a:hover,
.products-cat__subs a.is-active {
  color: var(--color-primary);
  background: rgba(28, 116, 187, 0.06);
}

/* ---------- 产品网格 ---------- */
.products-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}

.product-card {
  display: flex;
  flex-direction: column;
  color: var(--color-text-primary);
  transition: transform 0.25s ease;
}

.product-card:hover {
  color: var(--color-primary-dark);
  transform: translateY(-3px);
}

.product-card__media {
  position: relative;
  aspect-ratio: 4 / 3;
  border: 1px solid var(--color-border-light);
  background:
    radial-gradient(ellipse at center, #ffffff 35%, #eef2f6 100%);
  overflow: hidden;
}

.product-card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.45s ease;
}

.product-card:hover .product-card__media img {
  transform: scale(1.04);
}

.product-card__media--diagram img {
  object-fit: cover;
  opacity: 0.92;
}

.product-card__name {
  margin: 12px 0 0;
  padding: 0 4px;
  font-size: 0.92rem;
  font-weight: 500;
  line-height: 1.5;
  text-align: center;
  color: inherit;
}

.product-card.is-hidden {
  display: none;
}

.products-empty {
  margin: 48px 0;
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

/* 导航产品下拉略加宽 */
.dropdown-menu--products {
  min-width: 220px;
}

/* 短文案下拉（走进开来等）按内容收窄 */
.dropdown-menu--compact {
  min-width: 0;
  width: max-content;
}

/* ==========================================================================
   平板
   ========================================================================== */
@media (max-width: 992px) {
  .products-section {
    padding: 48px 0 64px;
  }

  .products-layout {
    grid-template-columns: 200px minmax(0, 1fr);
    gap: 20px;
  }

  .products-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }

  .products-cat__btn {
    font-size: 0.85rem;
    min-height: 44px;
    padding: 10px 12px;
  }
}

/* ==========================================================================
   手机
   ========================================================================== */
@media (max-width: 768px) {
  .products-section {
    padding: 40px 0 56px;
  }

  .section-heading {
    margin-bottom: 28px;
  }

  .products-layout {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .products-sidebar {
    display: flex;
    gap: 8px;
    overflow-x: auto;
    padding: 2px 2px 10px;
    -webkit-overflow-scrolling: touch;
  }

  .products-cat {
    flex: 0 0 auto;
    border-bottom: none;
  }

  .products-cat__btn {
    width: auto;
    padding: 8px 16px;
    border: 1px solid var(--color-border);
    border-radius: 999px;
    background: var(--color-bg-white);
    white-space: nowrap;
    font-size: 0.85rem;
    min-height: 0;
  }

  .products-cat__arrow,
  .products-cat__subs {
    display: none;
  }

  .products-cat.is-active .products-cat__btn {
    color: #fff;
    background: var(--color-primary);
    border-color: var(--color-primary);
  }

  .products-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
  }

  .product-card__name {
    font-size: 0.82rem;
  }
}

@media (max-width: 480px) {
  .products-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
  }

  .product-card__name {
    font-size: 0.78rem;
  }
}

/* ---------- 解决方案 / 客户案例 — 无缝走马灯（约束在版心内） ---------- */
.marquee-section {
  padding: 64px 0 56px;
  background: #fff;
}

.marquee-section--alt {
  padding-top: 40px;
  padding-bottom: 72px;
  background: linear-gradient(180deg, #fafbfc 0%, #ffffff 40%, #ffffff 100%);
}

.marquee-section__intro {
  margin: -8px auto 36px;
  max-width: 720px;
  text-align: center;
  font-size: 0.95rem;
  line-height: 1.9;
  color: var(--color-text-secondary);
}

/* 走马灯：宽度跟随版心 .container，不做全屏破版 */
.marquee {
  position: relative;
  width: 100%;
  max-width: 100%;
  overflow: hidden;
}

.marquee__track {
  display: flex;
  width: max-content;
  will-change: transform;
}

.marquee__group {
  display: flex;
  flex-shrink: 0;
  gap: 20px;
  padding-right: 20px;
}

.marquee.is-ready .marquee__track {
  animation: marquee-scroll var(--marquee-duration, 45s) linear infinite;
}

.marquee.is-ready[data-direction="reverse"] .marquee__track {
  animation-name: marquee-scroll-reverse;
}

.marquee.is-paused .marquee__track,
.marquee:hover .marquee__track {
  animation-play-state: paused;
}

@keyframes marquee-scroll {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

@keyframes marquee-scroll-reverse {
  from { transform: translateX(-50%); }
  to { transform: translateX(0); }
}

/* ---------- 卡片 ---------- */
.marquee-card {
  flex: 0 0 auto;
  width: 280px;
  color: var(--color-text-primary);
  background: #fff;
  transition: color var(--transition), transform 0.25s ease;
}

.marquee-card:hover {
  color: var(--color-primary-dark);
}

.marquee-card__media {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: var(--color-bg-gray);
  border: 1px solid var(--color-border-light);
}

.marquee-card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.45s ease;
}

.marquee-card:hover .marquee-card__media img {
  transform: scale(1.05);
}

.marquee-card__title {
  margin: 0;
  padding: 14px 12px 4px;
  font-size: 0.92rem;
  font-weight: 500;
  line-height: 1.5;
  text-align: center;
  color: inherit;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  min-height: 2.9em;
}

/* ==========================================================================
   响应式
   ========================================================================== */
@media (max-width: 992px) {
  .marquee-section {
    padding: 48px 0 44px;
  }

  .marquee-card {
    width: 240px;
  }

  .marquee__group {
    gap: 16px;
    padding-right: 16px;
  }
}

@media (max-width: 768px) {
  .marquee-section {
    padding: 40px 0 36px;
  }

  .marquee-section--alt {
    padding-bottom: 56px;
  }

  .marquee-section__intro {
    margin-bottom: 28px;
    font-size: 0.875rem;
    line-height: 1.8;
  }

  .marquee-card {
    width: 210px;
  }

  .marquee-card__title {
    font-size: 0.85rem;
    padding: 12px 8px 2px;
  }
}

@media (max-width: 480px) {
  .marquee-card {
    width: 200px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .marquee.is-ready .marquee__track {
    animation: none;
  }

  .marquee {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  .marquee__track {
    padding-inline: 16px;
  }
}

/* ==========================================================================
   我们的优势 | advantages
   ========================================================================== */

.advantages {
  position: relative;
  isolation: isolate;
  padding: 80px 0;
  background:
    radial-gradient(ellipse 70% 55% at 50% 0%, rgba(74, 149, 209, 0.14), transparent 60%),
    linear-gradient(180deg, #f0f6fb 0%, #ffffff 55%, #f5f8fc 100%);
  color: var(--color-text-primary);
}

.advantages .container {
  position: relative;
  z-index: 1;
}

.advantages__grid {
  display: flex;
  flex-wrap: wrap;
  gap: 32px 24px;
  align-items: stretch;
  margin: 0;
  padding: 0;
  list-style: none;
}

.advantages__item {
  flex: 1 1 220px;
  min-width: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 18px;
  padding: 8px 6px;
  transition: transform var(--transition);
}

.advantages__item:hover {
  transform: translateY(-4px);
}

.advantages__icon {
  display: grid;
  place-items: center;
  width: 92px;
  height: 92px;
  border: 1px solid rgba(28, 116, 187, 0.22);
  border-radius: 50%;
  color: var(--color-primary);
  background:
    radial-gradient(circle at 30% 28%, rgba(255, 255, 255, 0.95), transparent 55%),
    linear-gradient(145deg, #eaf3fb 0%, #d6e8f6 100%);
  box-shadow: 0 8px 20px rgba(28, 116, 187, 0.1);
  flex-shrink: 0;
}

.advantages__icon svg {
  width: 42px;
  height: 42px;
  display: block;
  margin: 0 auto;
  stroke: currentColor;
  fill: none;
}

.advantages__icon img {
  max-width: 50px;
  max-height: 50px;
  width: auto;
  height: auto;
  display: block;
  object-fit: contain;
}

.advantages__text {
  margin: 0;
  max-width: 12em;
  font-size: 0.92rem;
  font-weight: 500;
  line-height: 1.75;
  color: var(--color-text-regular);
  letter-spacing: 0.02em;
  text-align: center;
}

/* 平板：5 → 3 */
@media (max-width: 1100px) {
  .advantages {
    padding: 64px 0;
  }

  .advantages__grid {
    gap: 36px 24px;
  }

  .advantages__item {
    flex-basis: 200px;
  }
}

/* 小平板：3 → 2 */
@media (max-width: 768px) {
  .advantages {
    padding: 56px 0;
  }

  .advantages__grid {
    gap: 36px 20px;
  }

  .advantages__item {
    flex-basis: 160px;
  }

  .advantages__icon {
    width: 84px;
    height: 84px;
  }

  .advantages__icon svg {
    width: 38px;
    height: 38px;
  }

  .advantages__text {
    max-width: 14em;
    font-size: 0.9rem;
  }
}

/* 手机：2 → 1 */
@media (max-width: 480px) {
  .advantages {
    padding: 48px 0;
  }

  .advantages__grid {
    gap: 40px;
    max-width: 280px;
    margin-inline: auto;
  }

  .advantages__item {
    flex-basis: 100%;
  }

  .advantages__icon {
    width: 80px;
    height: 80px;
  }

  .advantages__icon svg {
    width: 36px;
    height: 36px;
  }

  .advantages__text {
    max-width: none;
    font-size: 0.95rem;
  }
}

/* ==========================================================================
   走进开来 / 关于我们 | about
   ========================================================================== */

.about-section {
  padding: 64px 0 72px;
  background: #fff;
}

.about-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1.2fr);
  gap: 36px;
  align-items: center;
  margin-bottom: 48px;
}

.about-media {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-md);
  background: var(--color-bg-gray);
  box-shadow: var(--shadow-md);
  aspect-ratio: 4 / 3;
}

.about-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.about-content {
  font-size: 0.95rem;
  line-height: 1.95;
  color: var(--color-text-regular);
  text-align: justify;
}

.about-content p {
  margin: 0 0 1.1em;
}

.about-content p:last-child {
  margin-bottom: 0;
}

.about-content__brand {
  color: var(--color-primary);
  font-weight: 700;
}

.about-content__em {
  color: #c0392b;
  font-weight: 600;
}

.about-content__more {
  display: flex;
  flex-wrap: wrap;
  gap: 16px 24px;
  margin-top: 8px !important;
}

.about-content__more a {
  color: var(--color-primary);
  font-weight: 600;
  font-size: 0.9rem;
}

.about-content__more a:hover {
  color: var(--color-primary-dark);
}

/* ---------- 资质证书走马灯 ---------- */
.about-certs__title {
  margin: 0 0 20px;
  text-align: center;
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--color-text-primary);
  letter-spacing: 0.08em;
}

.marquee--certs .marquee__group {
  gap: 24px;
  padding-right: 24px;
  align-items: flex-start;
}

.cert-card {
  flex: 0 0 auto;
  width: 280px;
  margin: 0;
  text-align: center;
}

.cert-card__media {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 168px;
  padding: 12px 14px;
  background: #f7f9fb;
  border: 1px solid var(--color-border-light);
  box-sizing: border-box;
}

.cert-card__media img {
  display: block;
  max-width: 100%;
  max-height: 100%;
  width: auto;
  height: auto;
  object-fit: contain;
}

.cert-card__name {
  margin-top: 10px;
  padding: 0 4px;
  font-size: 0.82rem;
  line-height: 1.45;
  color: var(--color-text-primary);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  min-height: 2.4em;
}

@media (max-width: 992px) {
  .about-section {
    padding: 48px 0 56px;
  }

  .about-layout {
    grid-template-columns: 1fr 1.1fr;
    gap: 24px;
    margin-bottom: 36px;
  }

  .cert-card {
    width: 240px;
  }

  .cert-card__media {
    height: 148px;
  }
}

@media (max-width: 768px) {
  .about-section {
    padding: 40px 0 48px;
  }

  .about-layout {
    grid-template-columns: 1fr;
    gap: 20px;
    margin-bottom: 32px;
  }

  .about-media {
    aspect-ratio: 16 / 10;
  }

  .about-content {
    font-size: 0.9rem;
    line-height: 1.85;
    text-align: left;
  }

  .about-certs__title {
    margin-bottom: 16px;
    font-size: 1.05rem;
  }

  .marquee--certs .marquee__group {
    gap: 16px;
    padding-right: 16px;
  }

  .cert-card {
    width: 200px;
  }

  .cert-card__media {
    height: 128px;
    padding: 8px 10px;
  }

  .cert-card__name {
    font-size: 0.75rem;
  }
}

@media (max-width: 480px) {
  .cert-card {
    width: 180px;
  }

  .cert-card__media {
    height: 112px;
  }
}

/* ==========================================================================
   新闻动态 | news
   ========================================================================== */

.news-section {
  padding: 64px 0 56px;
  background: linear-gradient(180deg, #f7fafc 0%, #ffffff 55%, #ffffff 100%);
}

.news-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
}

.news-col {
  background: #fff;
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  padding: 22px 24px 12px;
  box-shadow: var(--shadow-sm);
}

.news-col__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 8px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-primary-lighter);
  position: relative;
}

.news-col__head::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 64px;
  height: 2px;
  background: var(--color-primary);
}

.news-col__title {
  margin: 0;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-text-primary);
  letter-spacing: 0.04em;
}

.news-col__more {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  white-space: nowrap;
}

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

.news-list li + li {
  border-top: 1px dashed var(--color-border-light);
}

.news-list a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 2px;
  color: var(--color-text-regular);
}

.news-list a:hover {
  color: var(--color-primary);
}

.news-list a:hover .news-list__title {
  color: var(--color-primary);
}

.news-list__title {
  flex: 1;
  min-width: 0;
  font-size: 0.925rem;
  line-height: 1.55;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.news-list time {
  flex-shrink: 0;
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  font-variant-numeric: tabular-nums;
}

/* ==========================================================================
   合作伙伴 | partners
   ========================================================================== */

.partners-section {
  padding: 56px 0 72px;
  background: #fff;
}

.partners-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 16px;
}

.partners-grid__item {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100px;
  padding: 14px 16px;
  background: #fafbfc;
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-sm);
  transition: border-color var(--transition), box-shadow var(--transition), transform 0.25s ease;
}

.partners-grid__item:hover {
  border-color: rgba(28, 116, 187, 0.35);
  box-shadow: var(--shadow-sm);
  transform: translateY(-2px);
}

.partners-grid__item img {
  max-width: 100%;
  max-height: 72px;
  width: auto;
  height: auto;
  object-fit: contain;
}

@media (max-width: 992px) {
  .news-section {
    padding: 48px 0 44px;
  }

  .news-layout {
    gap: 20px;
  }

  .partners-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (max-width: 768px) {
  .news-section {
    padding: 40px 0 36px;
  }

  .news-layout {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .news-col {
    padding: 18px 16px 8px;
  }

  .news-list__title {
    white-space: normal;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
  }

  .partners-section {
    padding: 40px 0 56px;
  }

  .partners-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
  }

  .partners-grid__item {
    min-height: 84px;
    padding: 10px 12px;
  }

  .partners-grid__item img {
    max-height: 56px;
  }
}

@media (max-width: 480px) {
  .partners-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .news-list a {
    align-items: flex-start;
    flex-direction: column;
    gap: 6px;
  }
}