/* ══════════════════════════════════════════════
   鲁桥新材料企业官网 - 样式表
   Brand: #E6212A (红) / #222222 (深灰) / #F5F5F5 (浅灰) / #fff
══════════════════════════════════════════════ */

/* ── 全局 ── */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif; color: #222222; background: #fff; }

/* ── 导航 ── */
#navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 2px 12px rgba(0,0,0,0.08);
  transition: background 0.3s, box-shadow 0.3s;
}
#navbar.scrolled {
  background: rgba(255, 255, 255, 1);
  box-shadow: 0 4px 20px rgba(0,0,0,0.12);
}
#navbar.at-top {
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
}

/* Logo */
.nav-logo-text {
  font-size: 1.1rem;
  font-weight: 900;
  color: #E6212A;
  letter-spacing: 0.05em;
  line-height: 1.1;
}
.nav-logo-sub {
  font-size: 0.6rem;
  color: #666;
  letter-spacing: 0.12em;
  line-height: 1;
}
.nav-logo-img {
  height: 55px;
  width: auto;
}

/* Logo 文字（头部左右布局） */
.nav-logo-text-wrap {
  display: flex;
  flex-direction: column;
  justify-content: center;
  line-height: 1.2;
}
.nav-logo-cn {
  font-size: 1.3rem;
  font-weight: 700;
  color: #222;
  letter-spacing: 0.04em;
}
.nav-logo-en {
  font-size: 0.67rem;
  color: #888;
  letter-spacing: 0.1em;
  margin-top: 1px;
}

/* 导航链接 */
.nav-link {
  position: relative;
  color: #222222;
  font-weight: 500;
  font-size: 0.88rem;
  padding: 4px 0;
  transition: color 0.2s;
  white-space: nowrap;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.nav-link .en { font-size: 0.62rem; color: #999; display: block; line-height: 1; margin-top: 1px; transition: color 0.2s; }
.nav-link::after {
  content: '';
  position: absolute; bottom: -2px; left: 0; right: 0;
  height: 2px; background: #E6212A;
  transform: scaleX(0); transform-origin: center;
  transition: transform 0.25s;
}
.nav-link:hover, .nav-link.active { color: #E6212A; }
.nav-link:hover .en, .nav-link.active .en { color: #E6212A; }
.nav-link:hover::after, .nav-link.active::after { transform: scaleX(1); }

/* 邮箱按钮 */
.nav-email {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 1rem;
  color: #222;
  font-weight: 500;
  transition: color 0.2s;
  white-space: nowrap;
}
.nav-email:hover { color: #E6212A; }
.nav-email-icon {
  width: 20px;
  height: 20px;
  color: #E6212A;
  flex-shrink: 0;
}

/* 语言切换 */
.nav-lang {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 0.85rem;
  font-weight: 600;
}
.lang-btn {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  color: #222;
  border: 1px solid #222;
  background: transparent;
  cursor: pointer;
  transition: background 0.2s, color 0.2s, border-color 0.2s;
}
.lang-btn:hover {
  background: #E6212A;
  color: #fff;
  border-color: #E6212A;
}
.lang-flag {
  width: 18px;
  height: 9px;
  flex-shrink: 0;
}

/* ── 下拉菜单 ── */
.nav-dropdown {
  position: relative;
}
.nav-dropdown .dropdown-trigger {
  display: flex;
  flex-direction: column;
  align-items: center;
}
.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(8px);
  display: flex;
  flex-wrap: nowrap;
  background: #fff;
  border: 1px solid #eee;
  border-radius: 8px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.12);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s, transform 0.25s, visibility 0.25s;
  z-index: 100;
  padding: 0.5rem;
  white-space: nowrap;
  gap: 0;
}
.nav-dropdown:hover .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}
.dropdown-item {
  display: block;
  padding: 0.6rem 1rem;
  font-size: 0.82rem;
  color: #222;
  transition: background 0.2s, color 0.2s;
  cursor: pointer;
  border-right: 1px solid #f0f0f0;
  white-space: nowrap;
}
.dropdown-item:last-child { border-right: none; }
.dropdown-item:hover {
  background: #F5F5F5;
  color: #E6212A;
}

/* 移动端菜单 */
#mobile-menu { display: none; }
#mobile-menu.open { display: block; }
.mobile-submenu { display: none; }
.mobile-submenu.hidden { display: none; }
.mobile-submenu:not(.hidden) { display: block; }

/* ── Banner ── */
#banner { position: relative; height: 100vh; min-height: 600px; overflow: hidden; }
.slide { position: absolute; inset: 0; opacity: 0; transition: opacity 1s ease; }
.slide.active { opacity: 1; }
.slide-bg {
  width: 100%; height: 100%; object-fit: cover;
  transform: scale(1.05);
  transition: transform 8s ease;
}
.slide.active .slide-bg { transform: scale(1); }
.slide-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(230,33,42,0.55) 0%, rgba(34,34,34,0.72) 100%);
}
.banner-content {
  position: absolute; inset: 0;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  text-align: center; padding: 1.5rem;
}
.banner-tag {
  display: inline-block;
  border: 1px solid rgba(255,255,255,0.55);
  color: rgba(255,255,255,0.9);
  font-size: 0.78rem; letter-spacing: 0.2em;
  padding: 0.3rem 1rem; margin-bottom: 1.5rem;
}
.banner-title {
  font-size: clamp(2rem, 6vw, 4rem);
  font-weight: 900; color: #fff;
  line-height: 1.2; letter-spacing: 0.05em;
  text-shadow: 0 2px 20px rgba(0,0,0,0.3);
  margin-bottom: 1rem;
}
.banner-sub {
  font-size: clamp(0.9rem, 2vw, 1.15rem);
  color: rgba(255,255,255,0.85);
  max-width: 640px; margin: 0 auto 2rem;
  line-height: 1.8;
}
.btn-primary {
  display: inline-block;
  background: #E6212A; color: #fff;
  font-size: 0.95rem; font-weight: 700; letter-spacing: 0.1em;
  padding: 0.8rem 2.4rem;
  border: 2px solid #E6212A;
  transition: background 0.25s, color 0.25s, border-color 0.25s;
  cursor: pointer;
}
.btn-primary:hover { background: #222222; border-color: #222222; color: #fff; }
.btn-outline {
  display: inline-block;
  background: transparent; color: #fff;
  font-size: 0.95rem; font-weight: 700; letter-spacing: 0.1em;
  padding: 0.8rem 2.4rem;
  border: 2px solid rgba(255,255,255,0.7);
  transition: background 0.25s, color 0.25s, border-color 0.25s;
  cursor: pointer; margin-left: 1rem;
}
.btn-outline:hover { background: #fff; color: #E6212A; border-color: #fff; }

/* Banner 指示器 */
.banner-dots { position: absolute; bottom: 2.5rem; left: 50%; transform: translateX(-50%); display: flex; gap: 10px; }
.dot { width: 28px; height: 3px; background: rgba(255,255,255,0.45); cursor: pointer; transition: background 0.3s, width 0.3s; }
.dot.active { background: #E6212A; width: 44px; }

/* Banner 箭头 */
.arrow-btn {
  position: absolute; top: 50%; transform: translateY(-50%);
  width: 48px; height: 48px;
  background: rgba(255,255,255,0.12); border: 1px solid rgba(255,255,255,0.3);
  display: flex; align-items: center; justify-content: center;
  cursor: pointer; transition: background 0.25s, border-color 0.25s;
  z-index: 10;
}
.arrow-btn:hover { background: #E6212A; border-color: #E6212A; }
.arrow-btn svg { width: 20px; height: 20px; stroke: #fff; }

/* ── 通用板块 ── */
.section-label {
  font-size: 0.78rem; letter-spacing: 0.25em; color: #E6212A;
  font-weight: 600; margin-bottom: 0.5rem; text-transform: uppercase;
}
.section-title {
  font-size: clamp(1.6rem, 4vw, 2.6rem);
  font-weight: 800; color: #222222; line-height: 1.2;
  margin-bottom: 0.75rem;
}
.section-divider {
  width: 48px; height: 3px; background: #E6212A;
  margin: 0 auto 1.5rem;
}
.section-divider.left { margin: 0 0 1.5rem; }

/* ── 关于我们 ── */
.about-wrapper {
  display: flex;
  align-items: stretch;
}
.about-left {
  padding: 2.5rem;
  background: #f5f5f5;
  border-radius: 0 0 12px 12px;
  display: flex;
  flex-direction: column;
}
.about-title {
  font-size: 2rem;
  font-weight: 800;
  color: #E6212A;
  line-height: 1.2;
  margin-bottom: 0.5rem;
}
.about-title-line {
  width: 40px;
  height: 3px;
  background: #E6212A;
  margin-bottom: 1rem;
}
.about-subtitle {
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  color: #999;
  font-weight: 500;
  margin-bottom: 0.5rem;
}
.about-brand {
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: #E6212A;
  font-weight: 600;
  margin-bottom: 1.5rem;
}
.about-heading {
  font-size: 1.6rem;
  font-weight: 800;
  color: #222;
  line-height: 1.4;
  margin-bottom: 1.5rem;
}
.about-year {
  color: #E6212A;
}
.about-desc {
  font-size: 0.85rem;
  color: #666;
  line-height: 1.9;
  margin-bottom: 1.5rem;
}
.about-section-title {
  font-size: 1rem;
  font-weight: 700;
  color: #222;
  margin-bottom: 0.75rem;
}
.about-more-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #222;
  color: #fff;
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.7rem 1.5rem;
  cursor: pointer;
  transition: background 0.25s;
  border: none;
  border-radius: 0 0 8px 8px;
  width: fit-content;
}
.about-more-btn:hover { background: #E6212A; }
.about-arrow { font-size: 1rem; }

/* 右侧数据卡片 */
.about-right { display: flex; flex-direction: column; gap: 1.5rem; }
.about-data-card {
  background: #E6212A;
  background-image: url('img/logo1.webp');
  background-position: center center;
  background-repeat: no-repeat;
  background-size: cover;
  border-radius: 12px;
  padding: 2rem 2.5rem;
  color: #fff;
  position: relative;
  min-height: 100%;
}
/* 半透明白色遮罩实现背景图0.1透明度 */
.about-data-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(230, 33, 42, 0.9);
  border-radius: 12px;
  z-index: 0;
}
.about-data-card > * {
  position: relative;
  z-index: 1;
}
.about-data-intro {
  font-size: 0.85rem;
  line-height: 1.8;
  margin-bottom: 1.5rem;
  opacity: 0.95;
}
.about-data-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  margin-bottom: 1.5rem;
}
.about-data-item {
  text-align: center;
  padding: 0 2.5rem;
  flex: 1;
}
.about-data-num {
  font-size: 3rem;
  font-weight: 900;
  line-height: 1;
  margin-bottom: 0.5rem;
}
.about-data-plus { font-size: 1.8rem; font-weight: 700; }
.about-data-label {
  font-size: 0.8rem;
  opacity: 0.9;
  letter-spacing: 0.05em;
}
.about-data-divider {
  width: 1px;
  height: 50px;
  background: rgba(255,255,255,0.3);
  flex-shrink: 0;
}
.about-data-footer {
  font-size: 0.8rem;
  line-height: 1.8;
  opacity: 0.9;
  text-align: center;
}

/* 图片区域 - 一行2个 */
.about-images {
  display: flex;
  gap: 1rem;
  align-items: stretch;
}
.about-img-item {
  border-radius: 12px;
  overflow: hidden;
  height: 320px;
  flex-shrink: 0;
}
.about-img-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.about-img-item:hover img { transform: scale(1.05); }
/* 第一张图：等比例显示全（宽度自适应内容） */
.about-img-left {
  flex: 0 0 auto;
  width: auto;
}
.about-img-left img {
  width: auto;
  max-width: 100%;
  object-fit: contain;
}
/* 第二张图：占满剩余空间 */
.about-img-right {
  flex: 1 1 auto;
  min-width: 0;
}

/* 响应式 */
@media (max-width: 1024px) {
  .about-data-item { padding: 0 1.5rem; }
  .about-data-num { font-size: 2.2rem; }
}
@media (max-width: 768px) {
  .about-data-row { flex-direction: column; gap: 1.5rem; }
  .about-data-divider { display: none; }
  .about-data-item { padding: 0; }
  .about-img-item { height: 220px; }
  .about-left { padding: 1.5rem; }
}

/* ── 产品卡片 ── */
.product-card {
  background: #F5F5F5;
  transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s;
  border: 2px solid transparent;
  overflow: hidden;
  cursor: pointer;
}
.product-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 48px rgba(230,33,42,0.15);
  border-color: #E6212A;
}
.product-card:hover .product-icon { background: #E6212A; }
.product-icon {
  width: 56px; height: 56px;
  background: #222222;
  display: flex; align-items: center; justify-content: center;
  transition: background 0.3s;
}
.product-icon svg { width: 28px; height: 28px; stroke: #fff; }
.product-img { width: 100%; height: 200px; object-fit: cover; }

/* ── 手风琴产品分类 ── */
.products-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 2rem;
  flex-wrap: wrap;
  gap: 1.5rem;
}
.products-header-left {
  flex: 1;
  min-width: 200px;
}
.products-header-right {
  flex-shrink: 0;
}
.products-header-right .btn-primary {
  border-radius: 8px;
  display: inline-block;
  background: #E6212A;
  color: #fff;
  font-size: 0.9rem;
  font-weight: 700;
  padding: 0.8rem 2rem;
  border: 2px solid #E6212A;
  text-decoration: none;
  transition: background 0.25s, color 0.25s, border-color 0.25s;
}
.products-subtitle {
  color: #666;
  max-width: 600px;
  margin: 0 0 2rem;
  font-size: 0.95rem;
  line-height: 1.8;
  text-align: left;
}
.product-accordion {
  margin: 0 auto;
}
.accordion-item {
  border-bottom: 1px solid #e0e0e0;
  overflow: hidden;
}
.accordion-item:first-child {
  border-top: 1px solid #e0e0e0;
}
.accordion-header {
  display: flex;
  align-items: center;
  padding: 1.5rem 0;
  cursor: pointer;
  transition: background 0.3s;
  gap: 1.5rem;
}
.accordion-header:hover {
  background: #E6212A;
}
.accordion-header:hover .accordion-num {
  color: #fff;
  opacity: 1;
}
.accordion-header:hover .accordion-title {
  color: #fff;
}
.accordion-header:hover .accordion-arrow svg {
  stroke: #fff;
}
.accordion-num {
  font-size: 2.5rem;
  font-weight: 900;
  color: #E6212A;
  line-height: 1;
  min-width: 60px;
  opacity: 0.3;
  transition: opacity 0.3s;
}
.accordion-item.active .accordion-num {
  opacity: 1;
  color: #fff;
}
/* active 状态下 header 红色背景，文字全白 */
.accordion-item.active .accordion-header {
  background: #E6212A;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}
.accordion-item.active .accordion-title {
  color: #fff;
}
.accordion-item.active .accordion-arrow svg {
  stroke: #fff;
}
.accordion-title {
  flex: 1;
  font-size: 1.35rem;
  font-weight: 700;
  color: #222;
  transition: color 0.3s;
}
.accordion-arrow {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.3s, background 0.3s;
}
.accordion-arrow svg {
  width: 20px;
  height: 20px;
  stroke: #666;
  transition: stroke 0.3s;
}
.accordion-item.active .accordion-arrow {
  transform: rotate(180deg);
}
.accordion-item.active .accordion-arrow svg {
  stroke: #E6212A;
}
.accordion-content {
  display: none;
  padding-bottom: 2rem;
  transition: background 0.3s;
}
.accordion-item.active .accordion-content {
  display: block;
}
/* 展开后：整体红色背景，所有字体白色（常态） */
.accordion-item.active .accordion-content {
  background: #E6212A;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
  border-radius: 0 0 12px 12px;
}
.accordion-item.active .accordion-text h3 {
  color: #fff;
}
.accordion-item.active .accordion-text p {
  color: rgba(255,255,255,0.92);
}
.accordion-item.active .accordion-tags span {
  background: rgba(255,255,255,0.2);
  color: #fff;
}
.accordion-item.active .accordion-tags span:hover {
  background: rgba(255,255,255,0.35);
  color: #fff;
}
.accordion-item.active .accordion-btn {
  background: #fff;
  color: #E6212A;
}
.accordion-item.active .accordion-btn:hover {
  background: #222;
  color: #fff;
}
.accordion-inner {
  display: flex;
  gap: 3rem;
  align-items: center;
}
.accordion-img {
  border-radius: 12px;
  overflow: hidden;
  width: 650px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}
.accordion-img img {
  width: 100%;
  height: auto;
  object-fit: contain;
  display: block;
  position: relative;
  z-index: 1;
  transition: transform 0.5s ease;
}
.accordion-img::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0.90);
  z-index: 0;
  border-radius: 12px;
  pointer-events: none;
}
.accordion-img:hover img {
  transform: scale(1.05);
}
.accordion-text h3 {
  font-size: 1.5rem;
  font-weight: 800;
  color: #E6212A;
  margin-bottom: 1rem;
}
.accordion-text p {
  font-size: 0.95rem;
  color: #555;
  line-height: 1.9;
  margin-bottom: 1.5rem;
}
.accordion-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}
.accordion-tags span {
  display: inline-block;
  padding: 0.5rem 1rem;
  background: #f5f5f5;
  color: #333;
  font-size: 0.85rem;
  font-weight: 500;
  border-radius: 4px;
  transition: background 0.3s, color 0.3s;
  cursor: pointer;
}
.accordion-tags span:hover {
  background: #E6212A;
  color: #fff;
}
.accordion-btn {
  display: inline-block;
  background: #222;
  color: #fff;
  font-size: 0.9rem;
  font-weight: 600;
  padding: 0.75rem 2rem;
  border-radius: 8px;
  transition: background 0.3s, color 0.3s;
  text-decoration: none;
  cursor: pointer;
}
.accordion-btn:hover {
  background: #E6212A;
  color: #fff;
}

/* 响应式 */
@media (max-width: 768px) {
  .accordion-inner {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  .accordion-img {
    width: 100%;
  }
  .accordion-num {
    font-size: 1.8rem;
    min-width: 40px;
  }
  .accordion-title {
    font-size: 1.1rem;
  }
}

/* ── 荣誉 ── */
.honor-card {
  background: #fff;
  transition: transform 0.3s, box-shadow 0.3s;
}
.honor-card:hover { transform: translateY(-4px); box-shadow: 0 12px 32px rgba(0,0,0,0.1); }

/* ── 合作伙伴 ── */
.partner-logo {
  border: 1px solid #e8e8e8;
  display: flex; align-items: center; justify-content: center;
  height: 80px; padding: 1rem;
  transition: border-color 0.25s, box-shadow 0.25s;
  background: #fff;
}
.partner-logo:hover { border-color: #E6212A; box-shadow: 0 4px 16px rgba(230,33,42,0.1); }

/* ── 联系我们 ── */
.contact-item { display: flex; align-items: flex-start; gap: 1rem; }
.contact-icon {
  width: 44px; height: 44px; flex-shrink: 0;
  background: rgba(255,255,255,0.15);
  display: flex; align-items: center; justify-content: center;
}
.contact-icon svg { width: 22px; height: 22px; stroke: #fff; }

/* ── 数字计数动画 ── */
@keyframes countUp { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }
.count-anim { animation: countUp 0.6s ease forwards; }

/* ── 滚动入场 ── */
.fade-in { opacity: 0; transform: translateY(30px); transition: opacity 0.7s ease, transform 0.7s ease; }
.fade-in.visible { opacity: 1; transform: translateY(0); }
.fade-in-left { opacity: 0; transform: translateX(-40px); transition: opacity 0.7s ease, transform 0.7s ease; }
.fade-in-left.visible { opacity: 1; transform: translateX(0); }
.fade-in-right { opacity: 0; transform: translateX(40px); transition: opacity 0.7s ease, transform 0.7s ease; }
.fade-in-right.visible { opacity: 1; transform: translateX(0); }

/* ── Scroll Top ── */
#scroll-top {
  position: fixed; bottom: 2rem; right: 2rem; z-index: 999;
  width: 44px; height: 44px;
  background: #E6212A;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer; opacity: 0; transform: translateY(20px);
  transition: opacity 0.3s, transform 0.3s, background 0.2s;
  box-shadow: 0 4px 16px rgba(230,33,42,0.4);
}
#scroll-top.show { opacity: 1; transform: translateY(0); }
#scroll-top:hover { background: #222222; }
#scroll-top svg { width: 20px; height: 20px; stroke: #fff; }

/* ── 响应式 ── */
@media (max-width: 768px) {
  .btn-outline { margin-left: 0; margin-top: 0.75rem; }
  .banner-content .flex-wrap { flex-direction: column; align-items: center; }
}


/* ══════════════════════════════════════════════
   科技创新板块 - 左右分栏滚动联动
══════════════════════════════════════════════ */

/* ── 整体布局 ── */
.innovation-section {
  background: #fff;
}

.inno-wrapper {
  display: flex;
  min-height: 100vh;
  padding: 0 3%;
}

/* ── 左页：固定导航 ── */
.inno-left-nav {
  flex: 0 0 30%;
  background: #fff;
  position: sticky;
  top: 80px;
  height: calc(100vh - 80px);
  display: flex;
  align-items: center;
}

.inno-nav-inner {
  width: 100%;
  padding: 2rem;
  position: relative;
}

/* 左侧大标题 */
.inno-hero-title {
  margin-bottom: 2.5rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid #eee;
}

.inno-hero-en {
  font-size: clamp(2.2rem, 3.5vw, 3.2rem);
  font-weight: 900;
  color: #222;
  line-height: 1.1;
  letter-spacing: 0.02em;
}

.inno-hero-cn {
  font-size: clamp(1.2rem, 2vw, 1.6rem);
  font-weight: 800;
  color: #222;
  margin-top: 0.75rem;
  letter-spacing: 0.08em;
}

.inno-nav-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.inno-nav-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.25rem 1.5rem;
  border-radius: 12px;
  text-decoration: none;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.inno-nav-item::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: #E6212A;
  transform: scaleY(0);
  transition: transform 0.3s ease;
}

.inno-nav-item:hover {
  background: rgba(230, 33, 42, 0.05);
}

.inno-nav-item:hover::before {
  transform: scaleY(1);
}

.inno-nav-item.active {
  background: rgba(230, 33, 42, 0.08);
}

.inno-nav-item.active::before {
  transform: scaleY(1);
}

.inno-nav-num {
  font-size: 1.5rem;
  font-weight: 900;
  color: #ddd;
  transition: color 0.3s ease;
  min-width: 40px;
}

.inno-nav-item.active .inno-nav-num,
.inno-nav-item:hover .inno-nav-num {
  color: #E6212A;
}

.inno-nav-text {
  font-size: 1.1rem;
  font-weight: 700;
  color: #666;
  transition: color 0.3s ease;
}

.inno-nav-item.active .inno-nav-text {
  color: #E6212A;
}

.inno-nav-item:hover .inno-nav-text {
  color: #333;
}

/* 进度条指示器 */
.inno-nav-progress {
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 120px;
  background: #f0f0f0;
  border-radius: 3px;
  overflow: hidden;
}

.inno-progress-bar {
  width: 100%;
  height: 33.33%;
  background: #E6212A;
  border-radius: 3px;
  transition: top 0.3s ease;
}

/* ── 右页：滚动内容 ── */
.inno-right-content {
  flex: 0 0 70%;
  background: #E6212A;
  position: relative;
  overflow: hidden;
}

/* 红色背景网格纹理 */
.inno-right-content::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
}

.inno-content-inner {
  padding: 4rem 3rem;
  position: relative;
  z-index: 1;
}

/* ── 内容区域 ── */
.inno-section {
  margin-bottom: 3rem;
  scroll-margin-top: 80px;
}

.inno-section:last-child {
  margin-bottom: 0;
}

.inno-section-card {
  background: #fff;
  border-radius: 20px;
  padding: 2.5rem;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
}

/* 卡片头部 */
.inno-card-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid #eee;
}

.inno-card-num {
  font-size: 2.5rem;
  font-weight: 900;
  color: #E6212A;
  opacity: 0.2;
  line-height: 1;
}

.inno-card-title {
  font-size: 1.5rem;
  font-weight: 800;
  color: #222;
  flex: 1;
}

.inno-card-line {
  width: 40px;
  height: 4px;
  background: #E6212A;
  border-radius: 2px;
}

/* 卡片内容 */
.inno-card-body p {
  font-size: 0.95rem;
  color: #555;
  line-height: 2;
  margin-bottom: 1rem;
  text-align: justify;
}

.inno-card-body p:last-child {
  margin-bottom: 0;
}

/* 研发中心图片 */
.inno-rd-images {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  margin-top: 2rem;
}

.inno-rd-img-item {
  border-radius: 12px;
  overflow: hidden;
  position: relative;
}

.inno-rd-img-item img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.inno-rd-img-item:hover img {
  transform: scale(1.05);
}

.inno-rd-img-label {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 1rem;
  background: linear-gradient(transparent, rgba(0,0,0,0.7));
  color: #fff;
  font-size: 0.9rem;
  font-weight: 600;
}

/* 研发成果网格 */
.inno-result-grid {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.inno-achievement-item {
  display: flex;
  gap: 1.5rem;
  padding: 1.5rem;
  background: #f8f8f8;
  border-radius: 12px;
  transition: all 0.3s ease;
}

.inno-achievement-item:hover {
  background: rgba(230, 33, 42, 0.05);
  transform: translateX(8px);
}

.inno-achievement-num {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: #E6212A;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  font-weight: 900;
  color: #fff;
  flex-shrink: 0;
}

.inno-achievement-content {
  flex: 1;
}

.inno-achievement-content h4 {
  font-size: 1.1rem;
  font-weight: 700;
  color: #222;
  margin-bottom: 0.5rem;
}

.inno-achievement-content p {
  font-size: 0.9rem;
  color: #666;
  line-height: 1.7;
}

/* 研发成果：左图右内容布局 */
.inno-result-layout {
  display: flex;
  gap: 2rem;
  align-items: flex-start;
}

.inno-result-img {
  flex: 0 0 42%;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 8px 24px rgba(0,0,0,0.12);
}

.inno-result-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.5s ease;
}

.inno-result-img:hover img {
  transform: scale(1.03);
}

.inno-result-layout .inno-result-grid {
  flex: 1;
  min-width: 0;
}

/* 科研设备列表（已移除，保留空占位） */
.inno-equip-tag {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  background: #f5f5f5;
  border-radius: 8px;
  font-size: 0.85rem;
  color: #555;
  transition: all 0.3s ease;
}

.inno-equip-tag:hover {
  background: #E6212A;
  color: #fff;
}

.inno-equip-icon {
  color: #E6212A;
  transition: color 0.3s ease;
}

.inno-equip-tag:hover .inno-equip-icon {
  color: #fff;
}

/* 科研设备标签列表 */
.inno-equip-list {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.75rem;
  margin-top: 1.25rem;
}

/* 科研设备图片网格 */
.inno-equip-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.inno-equip-thumb {
  border-radius: 10px;
  overflow: hidden;
  aspect-ratio: 4/3;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.inno-equip-thumb:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.2);
}

.inno-equip-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.5s ease;
}

.inno-equip-thumb:hover img {
  transform: scale(1.08);
}

/* ── 滚动动画 ── */
.inno-section {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.inno-section.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── 响应式 ── */
@media (max-width: 1200px) {
  .inno-nav-item {
    padding: 1rem 1.25rem;
  }
  
  .inno-nav-text {
    font-size: 1rem;
  }
  
  .inno-equip-list {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 1024px) {
  .inno-wrapper {
    flex-direction: column;
    padding: 0;
  }
  
  .inno-left-nav {
    flex: 0 0 auto;
    position: relative;
    top: 0;
    height: auto;
    background: #fff;
    border-bottom: 1px solid #eee;
  }
  
  .inno-nav-inner {
    padding: 1.5rem;
  }
  
  .inno-hero-title {
    margin-bottom: 1.5rem;
    padding-bottom: 1.5rem;
  }
  
  .inno-hero-en {
    font-size: clamp(1.6rem, 4vw, 2.2rem);
  }
  
  .inno-hero-cn {
    font-size: clamp(1rem, 2.5vw, 1.2rem);
  }
  
  .inno-nav-list {
    flex-direction: row;
    justify-content: center;
    gap: 0.5rem;
  }
  
  .inno-nav-item {
    padding: 0.75rem 1rem;
    border-radius: 8px;
  }
  
  .inno-nav-num {
    font-size: 1rem;
    min-width: 24px;
  }
  
  .inno-nav-text {
    font-size: 0.9rem;
  }
  
  .inno-nav-progress {
    display: none;
  }
  
  .inno-right-content {
    flex: 0 0 100%;
  }
  
  .inno-content-inner {
    padding: 2rem 1.5rem;
  }
  
  .inno-section-card {
    padding: 1.5rem;
  }
  
  .inno-card-header {
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
  }
  
  .inno-card-num {
    font-size: 1.8rem;
  }
  
  .inno-card-title {
    font-size: 1.2rem;
  }
  
  /* 研发成果在平板改为上下布局：图片在上，内容在下 */
  .inno-result-layout {
    flex-direction: column;
  }
  
  .inno-result-img {
    flex: 0 0 auto;
    width: 100%;
    max-height: 280px;
  }
  
  .inno-equip-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .inno-hero-title {
    margin-bottom: 1rem;
    padding-bottom: 1rem;
  }
  
  .inno-hero-en {
    font-size: clamp(1.4rem, 5vw, 1.8rem);
  }
  
  .inno-hero-cn {
    font-size: 0.95rem;
  }
  
  .inno-nav-list {
    gap: 0.25rem;
  }
  
  .inno-nav-item {
    padding: 0.5rem 0.75rem;
    gap: 0.5rem;
  }
  
  .inno-nav-num {
    font-size: 0.9rem;
    min-width: 20px;
  }
  
  .inno-nav-text {
    font-size: 0.85rem;
  }
  
  .inno-content-inner {
    padding: 1.5rem 1rem;
  }
  
  .inno-section-card {
    padding: 1.25rem;
    border-radius: 16px;
  }
  
  .inno-achievement-item {
    flex-direction: column;
    gap: 1rem;
    padding: 1rem;
  }
  
  .inno-achievement-num {
    width: 40px;
    height: 40px;
    font-size: 1rem;
  }
  
  .inno-equip-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.5rem;
  }
}

/* ═══════════════════════════════════════════
   新闻资讯 — 左右联动布局
═══════════════════════════════════════════ */

/* 标题区 */
.news-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 2.5rem;
}

.news-title-left {
  position: relative;
}

.news-watermark {
  font-size: clamp(3rem, 6vw, 5rem);
  font-weight: 900;
  color: rgba(230,33,42,0.08);
  line-height: 1;
  position: absolute;
  top: -0.3em;
  left: -0.1em;
  pointer-events: none;
  user-select: none;
}

.news-main-title {
  font-size: clamp(1.4rem, 2.5vw, 2rem);
  font-weight: 800;
  color: #222;
  position: relative;
  z-index: 1;
  margin: 0;
}

/* 顶部标签切换 */
.news-tabs-inline {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.news-tab-inline {
  font-size: 0.9rem;
  font-weight: 600;
  color: #999;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.25rem 0;
  transition: color 0.3s;
  position: relative;
}

.news-tab-inline:hover {
  color: #E6212A;
}

.news-tab-inline.active {
  color: #E6212A;
}

.news-tab-inline.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 2px;
  background: #E6212A;
}

.news-tab-sep {
  color: #ddd;
  font-size: 0.8rem;
}

/* 面板 */
.news-panel {
  display: none;
}

.news-panel.active {
  display: block;
}

/* 左右布局 */
.news-layout {
  display: flex;
  gap: 3rem;
  align-items: flex-start;
}

/* 左侧列表 */
.news-left {
  flex: 0 0 52%;
}

.news-list-vertical {
  display: flex;
  flex-direction: column;
}

.news-v-item {
  display: flex;
  gap: 1.5rem;
  padding: 1.5rem 0;
  border-bottom: 1px solid #e0e0e0;
  cursor: pointer;
  transition: all 0.3s ease;
  position: relative;
}

.news-v-item::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 3px;
  background: #E6212A;
  transition: width 0.4s ease;
}

.news-v-item.active::after {
  width: 60px;
}

.news-v-item:hover {
  background: rgba(230,33,42,0.02);
}

.news-v-item.active h3 {
  color: #E6212A;
}

.news-v-date {
  flex-shrink: 0;
  width: 60px;
  text-align: center;
}

.news-v-day {
  display: block;
  font-size: 2.2rem;
  font-weight: 300;
  color: #222;
  line-height: 1;
}

.news-v-ym {
  display: block;
  font-size: 0.7rem;
  color: #999;
  margin-top: 0.25rem;
}

.news-v-body {
  flex: 1;
  min-width: 0;
}

.news-v-body h3 {
  font-size: 0.95rem;
  font-weight: 700;
  color: #333;
  margin-bottom: 0.5rem;
  line-height: 1.5;
  transition: color 0.3s;
}

.news-v-body p {
  font-size: 0.82rem;
  color: #888;
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* 右侧详情 */
.news-right {
  flex: 1;
  position: relative;
  min-height: 420px;
}

.news-detail {
  display: none;
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 8px 32px rgba(0,0,0,0.1);
}

.news-detail.active {
  display: block;
}

.news-detail-img {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 140px;
  background-size: cover;
  background-position: center;
  background-color: #ddd;
}

.news-detail-text {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 160px;
  background: #E6212A;
  padding: 1.5rem 1.75rem;
  color: #fff;
}

.news-detail-text h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  line-height: 1.4;
}

.news-detail-text p {
  font-size: 0.8rem;
  line-height: 1.7;
  color: rgba(255,255,255,0.85);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* 查看更多按钮 */
.news-more-wrap {
  text-align: center;
  margin-top: 2.5rem;
}
.news-more-btn {
  display: inline-block;
  padding: 0.85rem 3rem;
  background: #E6212A;
  color: #fff;
  font-size: 0.95rem;
  font-weight: 700;
  border: 2px solid #E6212A;
  border-radius: 50px;
  text-decoration: none;
  transition: background 0.3s, color 0.3s, transform 0.2s;
  cursor: pointer;
}
.news-more-btn:hover {
  background: #fff;
  color: #E6212A;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(230,33,42,0.25);
}

/* ── 新闻列表页 - 卡片布局 ── */
.news-card-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.75rem;
}
.news-card {
  display: flex;
  flex-direction: column;
  background: #fff;
  border-radius: 14px;
  overflow: hidden;
  box-shadow: 0 4px 16px rgba(0,0,0,0.08);
  text-decoration: none;
  color: inherit;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.news-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 36px rgba(230,33,42,0.13);
}
.news-card-img {
  height: 200px;
  background-size: cover;
  background-position: center;
  flex-shrink: 0;
  transition: transform 0.5s ease;
}
.news-card:hover .news-card-img {
  transform: scale(1.05);
}
.news-card-body {
  padding: 1.25rem 1.5rem 1.5rem;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.news-card-date {
  font-size: 0.75rem;
  color: #999;
  margin-bottom: 0.5rem;
  letter-spacing: 0.05em;
}
.news-card-title {
  font-size: 1.0rem;
  font-weight: 700;
  color: #222;
  margin-bottom: 0.5rem;
  line-height: 1.5;
  transition: color 0.25s;
}
.news-card:hover .news-card-title {
  color: #E6212A;
}
.news-card-summary {
  font-size: 0.82rem;
  color: #888;
  line-height: 1.7;
  margin-bottom: 1rem;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-card-more {
  font-size: 0.8rem;
  font-weight: 600;
  color: #E6212A;
  letter-spacing: 0.05em;
  transition: letter-spacing 0.25s;
}
.news-card:hover .news-card-more {
  letter-spacing: 0.15em;
}

/* 新闻列表页响应式 */
@media (max-width: 768px) {
  .news-card-list {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }
  .news-card-img {
    height: 180px;
  }
}

/* 响应式 */
@media (max-width: 1024px) {
  .news-layout {
    flex-direction: column;
    gap: 2rem;
  }
  .news-left {
    flex: 0 0 auto;
    width: 100%;
  }
  .news-right {
    width: 100%;
    min-height: 360px;
  }
  .news-detail-img {
    bottom: 120px;
  }
  .news-detail-text {
    height: 140px;
    padding: 1.25rem 1.5rem;
  }
}

@media (max-width: 768px) {
  .news-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }
  .news-tabs-inline {
    margin-left: 0;
  }
  .news-v-day {
    font-size: 1.8rem;
  }
  .news-right {
    min-height: 320px;
  }
}

/* ═══════════════════════════════════════════
   合作伙伴 Logo 滚动墙
═══════════════════════════════════════════ */
.partner-marquee-section {
  padding: 5rem 0 6rem;
  background: #fff;
  overflow: hidden;
}

.marquee-row {
  overflow: hidden;
  margin-bottom: 1.25rem;
}
.marquee-row:last-child {
  margin-bottom: 0;
}

.marquee-track {
  display: flex;
  width: max-content;
}

.marquee-group {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding: 0 0.75rem;
  flex-shrink: 0;
}

.marquee-item {
  flex-shrink: 0;
  width: 180px;
  height: 90px;
  background: #fff;
  border-radius: 10px;
  border: 1px solid #eee;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1rem;
  transition: border-color 0.3s, box-shadow 0.3s;
}

.marquee-item:hover {
  border-color: #E6212A;
  box-shadow: 0 4px 16px rgba(230,33,42,0.12);
}

.marquee-item img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  display: block;
}

/* 向左滚动 */
.marquee-left .marquee-track {
  animation: marquee-left 120s linear infinite;
}

/* 向右滚动 */
.marquee-right .marquee-track {
  animation: marquee-right 125s linear infinite;
}

/* 悬停暂停 */
.marquee-row:hover .marquee-track {
  animation-play-state: paused;
}

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

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

/* 响应式 */
@media (max-width: 768px) {
  .marquee-item {
    width: 130px;
    height: 70px;
  }
  .marquee-group {
    gap: 1rem;
  }
  .marquee-left .marquee-track {
    animation-duration: 40s;
  }
  .marquee-right .marquee-track {
    animation-duration: 45s;
  }
}