/**
 * ColorCoat Multi-Page Stylesheet
 * Supports: 
 * 1. news.html (Новости)
 * 2. marine-offshore.html (Морская и офшорная отрасль)
 * 3. industrial-floor.html (Промышленные полы и напольные покрытия)
 * 4. steel-structures.html (Металлоконструкции и мосты)
 * 5. petrochemical.html (Нефтехимическая промышленность)
 * 6. applications.html (Центр областей применения)
 * Style Philosophy: Neo-Industrial Premium
 * Color Palette: Deep Blue (#001A3A), Classic Navy (#002B63), Electric Blue (#0B4EDB), Light Gray (#F5F7FA)
 */

/* ==========================================================================
   1. Reset & Global Base
   ========================================================================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  /* Color Tokens */
  --color-primary-dark: #001A3A;   /* 深蓝 - 背景与主标题 */
  --color-primary-navy: #002B63;   /* 经典海军蓝 - 次要深色 */
  --color-accent-blue: #0B4EDB;    /* 极速亮蓝 - 按钮、激活态、链接 */
  --color-accent-hover: #083cb3;   /* 亮蓝 Hover */
  --color-bg-light: #F5F7FA;       /* 浅灰底色 */
  --color-text-dark: #1E293B;      /* 深灰文本 */
  --color-text-muted: #64748B;     /* 柔和灰色文本 */
  --color-border: #E2E8F0;         /* 浅灰分割线 */
  --color-white: #FFFFFF;
  
  /* Fonts */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  
  /* Transitions */
  --transition-fast: 0.15s ease-out;
  --transition-normal: 0.25s cubic-bezier(0.23, 1, 0.32, 1); /* Snappy ease-out */
  
  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.05), 0 4px 6px -2px rgba(0, 0, 0, 0.02);
  --shadow-hover: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

body {
  font-family: var(--font-family);
  background-color: var(--color-bg-light);
  color: var(--color-text-dark);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition-fast);
}

img {
  max-width: 100%;
  display: block;
  object-fit: cover;
}

button {
  font-family: inherit;
  border: none;
  background: none;
  cursor: pointer;
  outline: none;
}

/* Container */
.container {
  width: 100%;
  max-width: 100%;
  margin: 0 auto;
  padding: 0 clamp(20px, 4vw, 80px);
}

/* Icons */
.icon {
  width: 16px;
  height: 16px;
  vertical-align: middle;
}

/* Common Section Layout */
section {
  padding: 64px 0;
}

.section-title {
  font-size: 32px;
  font-weight: 800;
  color: var(--color-primary-dark);
  margin-bottom: 40px;
  letter-spacing: -0.5px;
}

.text-center {
  text-align: center;
}

/* ==========================================================================
   4. Hero Section (首屏 - 通用与各页面特化)
   ========================================================================== */
.hero-section {
  position: relative;
  height: 290px;
  background-color: var(--color-primary-dark);
  color: var(--color-white);
  overflow: hidden;
  display: flex;
  align-items: center;
}

.hero-marine {
  height: auto;
  min-height: 380px;
  padding: 48px 0;
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

.hero-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: right center;
}

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, rgba(0, 26, 58, 0.95) 0%, rgba(0, 26, 58, 0.8) 40%, rgba(0, 26, 58, 0.2) 100%);
}

.hero-container {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  height: 100%;
  gap: 40px;
}

.hero-content {
  max-width: 650px;
}

/* Breadcrumbs */
.breadcrumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: 24px;
}

.breadcrumbs a:hover {
  color: var(--color-white);
}

.breadcrumbs .separator {
  color: rgba(255, 255, 255, 0.3);
}

.breadcrumbs .current {
  color: var(--color-white);
  font-weight: 500;
}

.hero-title {
  font-size: 48px;
  font-weight: 800;
  margin-bottom: 16px;
  letter-spacing: -1px;
  line-height: 1.15;
}

.hero-desc {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.8);
  line-height: 1.5;
  font-weight: 400;
}

/* Hero bottom 4 advantages (用于船舶海工, 工业地坪, 钢结构, 石油化工) */
.hero-features {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  padding-top: 24px;
}

.hero-feature-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
}

.feature-icon-box {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.feature-icon {
  width: 20px;
  height: 20px;
  color: var(--color-white);
}

.feature-text {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.9);
  line-height: 1.4;
  font-weight: 500;
}

/* ==========================================================================
   5. Filter Section (分类 Tab + 搜索 - 用于新闻页)
   ========================================================================== */
.filter-section {
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  padding: 16px 0;
}

.filter-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
}

.tabs-wrapper {
  overflow-x: auto;
  scrollbar-width: none;
}

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

.tabs {
  display: flex;
  gap: 28px;
  white-space: nowrap;
}

.tab-btn {
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text-muted);
  padding: 12px 0;
  position: relative;
  transition: var(--transition-fast);
}

.tab-btn:hover {
  color: var(--color-primary-navy);
}

.tab-btn::after {
  content: '';
  position: absolute;
  bottom: -16px;
  left: 0;
  width: 100%;
  height: 3px;
  background-color: var(--color-accent-blue);
  transform: scaleX(0);
  transition: transform var(--transition-normal);
  z-index: 2;
}

.tab-btn.active {
  color: var(--color-accent-blue);
  font-weight: 600;
}

.tab-btn.active::after {
  transform: scaleX(1);
}

/* Search Box */
.search-box {
  position: relative;
  width: 320px;
}

.search-box input {
  width: 100%;
  height: 42px;
  background-color: var(--color-bg-light);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  padding: 0 16px 0 42px;
  font-size: 14px;
  color: var(--color-text-dark);
  outline: none;
  transition: var(--transition-normal);
}

.search-box input:focus {
  border-color: var(--color-accent-blue);
  background-color: var(--color-white);
  box-shadow: 0 0 0 3px rgba(11, 78, 219, 0.1);
}

.search-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-muted);
  pointer-events: none;
}

/* ==========================================================================
   6. News Main Layout (新闻页双栏布局)
   ========================================================================== */
.news-layout {
  display: grid;
  grid-template-columns: 74% 26%;
  gap: 40px;
}

/* Left Content - News Cards Grid */
.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

/* Featured card (置顶大图卡片) */
.featured-card {
  grid-column: span 3;
  display: flex;
  background-color: var(--color-white);
  border-radius: 8px;
  border: 1px solid var(--color-border);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition-normal);
}

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

.featured-img-box {
  width: 50%;
  height: 340px;
  overflow: hidden;
}

.featured-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-normal);
}

.featured-card:hover .featured-img {
  transform: scale(1.03);
}

.featured-info {
  width: 50%;
  padding: 40px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

/* Standard news card */
.news-card {
  background-color: var(--color-white);
  border-radius: 8px;
  border: 1px solid var(--color-border);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  transition: var(--transition-normal);
}

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

.news-img-box {
  width: 100%;
  height: 200px;
  overflow: hidden;
}

.news-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-normal);
}

.news-card:hover .news-img {
  transform: scale(1.03);
}

.news-info {
  padding: 24px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

/* Card metadata */
.news-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.news-category {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--color-accent-blue);
  letter-spacing: 0.5px;
}

.news-date {
  font-size: 12px;
  color: var(--color-text-muted);
}

.news-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-primary-dark);
  line-height: 1.35;
  margin-bottom: 12px;
  transition: var(--transition-fast);
}

.featured-card .news-title {
  font-size: 26px;
  margin-bottom: 16px;
}

.news-title:hover {
  color: var(--color-accent-blue);
}

.news-excerpt {
  font-size: 13.5px;
  color: var(--color-text-muted);
  line-height: 1.5;
  margin-bottom: 20px;
}

.featured-card .news-excerpt {
  font-size: 14.5px;
  margin-bottom: 28px;
}

.btn-readmore {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 700;
  color: var(--color-accent-blue);
  margin-top: auto;
  align-self: flex-start;
}

.btn-readmore::after {
  content: '→';
  transition: transform var(--transition-fast);
}

.btn-readmore:hover::after {
  transform: translateX(4px);
}

/* Pagination */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  margin-top: 48px;
}

.page-btn {
  width: 40px;
  height: 40px;
  border-radius: 6px;
  border: 1px solid var(--color-border);
  background-color: var(--color-white);
  color: var(--color-text-dark);
  font-size: 14px;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-fast);
}

.page-btn:hover {
  border-color: var(--color-accent-blue);
  color: var(--color-accent-blue);
}

.page-btn.active {
  background-color: var(--color-accent-blue);
  border-color: var(--color-accent-blue);
  color: var(--color-white);
}

.page-dots {
  color: var(--color-text-muted);
  font-weight: 600;
}

/* Right Content - Sidebar (侧边栏) */
.sidebar {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.sidebar-widget {
  background-color: var(--color-white);
  border-radius: 8px;
  border: 1px solid var(--color-border);
  padding: 24px;
}

.widget-title {
  font-size: 16px;
  font-weight: 800;
  text-transform: uppercase;
  color: var(--color-primary-dark);
  margin-bottom: 20px;
  letter-spacing: 0.5px;
  position: relative;
  padding-bottom: 8px;
}

.widget-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 32px;
  height: 2px;
  background-color: var(--color-accent-blue);
}

/* Categories Widget */
.category-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.category-link {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-dark);
  padding: 10px 12px;
  border-radius: 6px;
  transition: var(--transition-fast);
}

.category-link:hover {
  background-color: var(--color-bg-light);
  color: var(--color-accent-blue);
}

.category-link.active {
  background-color: rgba(11, 78, 219, 0.05);
  color: var(--color-accent-blue);
  font-weight: 600;
}

.category-count {
  font-size: 12px;
  color: var(--color-text-muted);
  background-color: var(--color-bg-light);
  padding: 2px 8px;
  border-radius: 10px;
}

.category-link:hover .category-count,
.category-link.active .category-count {
  background-color: rgba(11, 78, 219, 0.1);
  color: var(--color-accent-blue);
}

/* Popular News Widget */
.popular-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.popular-item {
  display: flex;
  gap: 12px;
}

.popular-img-box {
  width: 72px;
  height: 72px;
  border-radius: 4px;
  overflow: hidden;
  flex-shrink: 0;
}

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

.popular-info {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.popular-title {
  font-size: 13px;
  font-weight: 700;
  color: var(--color-primary-dark);
  line-height: 1.35;
  margin-bottom: 6px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.popular-title:hover {
  color: var(--color-accent-blue);
}

.popular-date {
  font-size: 11px;
  color: var(--color-text-muted);
}

/* Sidebar Contact CTA Widget */
.sidebar-cta {
  background-color: var(--color-primary-dark);
  color: var(--color-white);
  border-radius: 8px;
  padding: 32px 24px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.sidebar-cta-icon-box {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.sidebar-cta-icon {
  width: 24px;
  height: 24px;
  color: var(--color-white);
}

.sidebar-cta-title {
  font-size: 18px;
  font-weight: 800;
  margin-bottom: 12px;
}

.sidebar-cta-desc {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.5;
  margin-bottom: 24px;
}

.sidebar-cta .btn {
  width: 100%;
}

/* ==========================================================================
   7. Section-specific Content Styles (用于应用领域详情页面)
   ========================================================================== */

/* 7.1. Challenges Grid (5列关键挑战卡片) */
.challenges-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
}

.challenge-card {
  background-color: var(--color-white);
  border-radius: 8px;
  border: 1px solid var(--color-border);
  padding: 24px;
  transition: var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.challenge-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(11, 78, 219, 0.2);
}

.challenge-icon-box {
  width: 48px;
  height: 48px;
  border-radius: 6px;
  background-color: var(--color-bg-light);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  color: var(--color-primary-navy);
  transition: var(--transition-fast);
}

.challenge-card:hover .challenge-icon-box {
  background-color: rgba(11, 78, 219, 0.05);
  color: var(--color-accent-blue);
}

.challenge-icon {
  width: 24px;
  height: 24px;
}

.challenge-title {
  font-size: 15px;
  font-weight: 800;
  color: var(--color-primary-dark);
  line-height: 1.35;
  margin-bottom: 12px;
}

.challenge-desc {
  font-size: 12.5px;
  color: var(--color-text-muted);
  line-height: 1.5;
}

/* 7.2. Recommended Systems Section (5列产品推荐系统卡片) */
.systems-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: 32px;
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 16px;
}

.systems-header .section-title {
  margin-bottom: 0;
}

.systems-tab-title {
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--color-accent-blue);
  letter-spacing: 0.5px;
  padding-bottom: 16px;
  border-bottom: 2px solid var(--color-accent-blue);
  margin-bottom: -18px;
}

.systems-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
}

.product-card {
  background-color: var(--color-white);
  border-radius: 8px;
  border: 1px solid var(--color-border);
  overflow: hidden;
  transition: var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.product-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(11, 78, 219, 0.2);
}

.product-header {
  padding: 16px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--color-bg-light);
}

.product-num {
  font-size: 18px;
  font-weight: 800;
  color: var(--color-accent-blue);
}

.product-tag {
  font-size: 11px;
  font-weight: 600;
  color: var(--color-text-muted);
}

.product-img-box {
  height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  background-color: var(--color-white);
}

.product-img {
  max-height: 100%;
  max-width: 100%;
  object-fit: contain;
  transition: transform var(--transition-normal);
}

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

.product-info {
  padding: 20px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.product-name {
  font-size: 15px;
  font-weight: 800;
  color: var(--color-primary-dark);
  margin-bottom: 8px;
  line-height: 1.35;
}

.product-desc {
  font-size: 12px;
  color: var(--color-text-muted);
  line-height: 1.5;
}

.systems-footer-note {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--color-text-muted);
  margin-top: 24px;
}

.systems-footer-note .icon {
  color: var(--color-accent-blue);
}

/* 7.3. Typical Objects Section (5列典型应用对象卡片) */
.objects-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
}

.object-card {
  position: relative;
  height: 180px;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  cursor: pointer;
  transition: var(--transition-normal);
}

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

.object-img-box {
  width: 100%;
  height: 100%;
}

.object-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-normal);
}

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

.object-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(180deg, rgba(0, 26, 58, 0.1) 0%, rgba(0, 26, 58, 0.85) 100%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 20px;
  color: var(--color-white);
}

.object-info-wrapper {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  width: 100%;
}

.object-title-box {
  display: flex;
  align-items: center;
  gap: 10px;
}

.object-card-icon {
  width: 20px;
  height: 20px;
  color: rgba(255, 255, 255, 0.8);
}

.object-name {
  font-size: 13.5px;
  font-weight: 700;
  line-height: 1.3;
}

.object-arrow {
  width: 16px;
  height: 16px;
  opacity: 0;
  transform: translateX(-10px);
  transition: all var(--transition-normal);
}

.object-card:hover .object-arrow {
  opacity: 1;
  transform: translateX(0);
}

/* ==========================================================================
   8. Advantages Bar (优势条区域)
   ========================================================================== */
.advantages-bar-section {
  background-color: var(--color-white);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  padding: 32px 0;
}

.advantages-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.adv-item {
  display: flex;
  align-items: center;
  gap: 16px;
  flex: 1;
}

.adv-icon-box {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background-color: rgba(11, 78, 219, 0.05);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent-blue);
  flex-shrink: 0;
}

.adv-icon {
  width: 22px;
  height: 22px;
}

.adv-text {
  display: flex;
  flex-direction: column;
}

.adv-title {
  font-size: 14px;
  font-weight: 800;
  color: var(--color-primary-dark);
  margin-bottom: 2px;
}

.adv-desc {
  font-size: 11.5px;
  color: var(--color-text-muted);
  line-height: 1.35;
}

.divider-line {
  width: 1px;
  height: 40px;
  background-color: var(--color-border);
  margin: 0 32px;
}

/* ==========================================================================
   9. News Subscription Bar (新闻订阅条)
   ========================================================================== */
.subscribe-section {
  background-color: var(--color-primary-dark);
  color: var(--color-white);
  padding: 40px 0;
}

.subscribe-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 40px;
}

.subscribe-left {
  display: flex;
  align-items: center;
  gap: 24px;
}

.subscribe-icon-box {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.subscribe-icon {
  width: 24px;
  height: 24px;
}

.subscribe-text {
  display: flex;
  flex-direction: column;
}

.subscribe-title {
  font-size: 20px;
  font-weight: 800;
  margin-bottom: 4px;
}

.subscribe-desc {
  font-size: 13.5px;
  color: rgba(255, 255, 255, 0.7);
}

.subscribe-right {
  width: 480px;
}

.subscribe-form {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.input-group {
  display: flex;
  width: 100%;
}

.subscribe-form input[type="email"] {
  flex-grow: 1;
  height: 46px;
  background-color: var(--color-white);
  border: none;
  border-radius: 6px 0 0 6px;
  padding: 0 16px;
  font-size: 14px;
  color: var(--color-text-dark);
  outline: none;
}

.subscribe-form .btn-subscribe {
  height: 46px;
  border-radius: 0 6px 6px 0;
  padding: 0 28px;
  background-color: var(--color-accent-blue);
  color: var(--color-white);
  font-size: 14px;
  font-weight: 600;
  transition: var(--transition-fast);
}

.subscribe-form .btn-subscribe:hover {
  background-color: var(--color-accent-hover);
}

.subscribe-note {
  font-size: 10.5px;
  color: rgba(255, 255, 255, 0.4);
}

/* ==========================================================================
   10. CTA Banner Section (通用 CTA 横幅)
   ========================================================================== */
.cta-banner-section {
  background-color: var(--color-primary-dark);
  color: var(--color-white);
  padding: 48px 0;
}

.cta-banner-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 40px;
}

.cta-left {
  display: flex;
  align-items: center;
  gap: 24px;
}

.cta-icon-box {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.cta-icon {
  width: 24px;
  height: 24px;
}

.cta-text {
  display: flex;
  flex-direction: column;
}

.cta-title {
  font-size: 22px;
  font-weight: 800;
  margin-bottom: 6px;
}

.cta-desc {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.45;
}

.cta-right {
  flex-shrink: 0;
}

.cta-right .btn {
  padding: 12px 32px;
}


/* ==========================================================================
   12. Core Applications Center Layout (应用领域中心 - applications.html)
   ========================================================================== */
.core-applications-section {
  background-color: var(--color-bg-light);
  padding: 80px 0;
}

.section-title-wrapper {
  margin-bottom: 56px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.title-underline {
  width: 48px;
  height: 3px;
  background-color: var(--color-accent-blue);
  margin-top: 16px;
}

.app-cards-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.app-card {
  background-color: var(--color-white);
  border-radius: 8px;
  border: 1px solid var(--color-border);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  transition: var(--transition-normal);
}

.app-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(11, 78, 219, 0.2);
}

.app-card-header {
  position: relative;
  height: 220px;
}

.app-card-num {
  position: absolute;
  top: 20px;
  left: 20px;
  font-size: 32px;
  font-weight: 800;
  color: var(--color-accent-blue);
  line-height: 1;
  z-index: 5;
}

.app-card-img-box {
  width: 100%;
  height: 100%;
  overflow: hidden;
}

.app-card-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-normal);
}

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

/* Hexagonal badge overlapping the boundary */
.app-card-badge {
  position: absolute;
  bottom: -24px;
  left: 24px;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10;
}

.badge-hex {
  position: absolute;
  width: 100%;
  height: 100%;
  color: var(--color-accent-blue);
  transition: color var(--transition-normal);
}

.app-card:hover .badge-hex {
  color: var(--color-primary-dark);
}

.badge-icon {
  position: relative;
  z-index: 2;
  width: 20px;
  height: 20px;
  color: var(--color-white);
}

.app-card-content {
  padding: 40px 24px 32px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.app-card-title {
  font-size: 18px;
  font-weight: 800;
  color: var(--color-primary-dark);
  margin-bottom: 12px;
  line-height: 1.35;
}

.app-card-desc {
  font-size: 13px;
  color: var(--color-text-muted);
  line-height: 1.5;
  margin-bottom: 24px;
}

/* Bullet list of key features */
.app-card-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 32px;
  border-top: 1px solid var(--color-bg-light);
  padding-top: 20px;
}

.app-card-features li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 12.5px;
  font-weight: 600;
  color: var(--color-primary-navy);
}

.check-icon {
  width: 14px;
  height: 14px;
  color: var(--color-accent-blue);
  flex-shrink: 0;
}

.btn-more {
  margin-top: auto;
  align-self: flex-start;
  padding: 10px 20px;
  border: 1px solid var(--color-border);
  background-color: transparent;
  color: var(--color-primary-navy);
  font-size: 13px;
  font-weight: 700;
}

.btn-more:hover {
  background-color: var(--color-accent-blue);
  border-color: var(--color-accent-blue);
  color: var(--color-white);
  transform: translateY(-1px);
}

.btn-more .arrow-icon {
  width: 14px;
  height: 14px;
  margin-left: 6px;
  transition: transform var(--transition-fast);
}

.btn-more:hover .arrow-icon {
  transform: translateX(3px);
}


/* ==========================================================================
   13. Responsive Breakpoints (响应式适配)
   ========================================================================== */
@media (max-width: 1340px) {
  .news-layout {
    grid-template-columns: 100%;
    gap: 48px;
  }
  
  .sidebar {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }
  
  .sidebar-widget {
    height: 100%;
  }
  
  .sidebar-cta {
    grid-column: span 3;
    flex-direction: row;
    text-align: left;
    justify-content: space-between;
    padding: 40px;
  }
  
  .sidebar-cta-icon-box {
    margin-bottom: 0;
  }
  
  .sidebar-cta .btn {
    width: auto;
  }

  .challenges-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .systems-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .objects-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .app-cards-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 1024px) {
  .hero-features {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .advantages-row {
    flex-direction: column;
    gap: 24px;
    align-items: flex-start;
  }
  
  .divider-line {
    display: none;
  }
  
  .subscribe-container, .cta-banner-container {
    flex-direction: column;
    align-items: flex-start;
    gap: 24px;
  }
  
  .subscribe-right {
    width: 100%;
  }
  
}

@media (max-width: 768px) {
  .news-grid {
    grid-template-columns: 100%;
  }
  
  .featured-card {
    grid-column: span 1;
    flex-direction: column;
  }
  
  .featured-img-box, .featured-info {
    width: 100%;
    height: auto;
  }
  
  .featured-img-box {
    height: 240px;
  }
  
  .sidebar {
    grid-template-columns: 100%;
  }
  
  .sidebar-cta {
    grid-column: span 1;
    flex-direction: column;
    align-items: center;
    text-align: center;
  }
  
  .sidebar-cta-icon-box {
    margin-bottom: 16px;
  }
  
  .filter-container {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .search-box {
    width: 100%;
  }

  .challenges-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .systems-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .objects-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .app-cards-grid {
    grid-template-columns: 100%;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 32px;
  }
  
  .hero-features {
    grid-template-columns: 100%;
  }

  .challenges-grid {
    grid-template-columns: 100%;
  }

  .systems-grid {
    grid-template-columns: 100%;
  }

  .objects-grid {
    grid-template-columns: 100%;
  }
}