/* ============================================
   解决方案专区专属样式 (solution.css)
   适用范围：方案列表页 + 4个方案详情页
============================================ */

/* 强制方案页在未滚动时，顶部导航文字为白色 */
#main-navbar:not(.scrolled) .nav-link-item,
#main-navbar:not(.scrolled) .action-btn { color: #fff !important; }

/* ============================================
   1. 方案页专属 Hero Banner (分页面独立控制背景)
============================================ */
.inner-page-hero {
  position: relative; width: 100%; display: flex; flex-direction: column; justify-content: flex-end;
  background-size: cover; background-position: center; background-repeat: no-repeat;
}
.inner-page-hero.hero-list { height: 650px; padding-bottom: 60px; }
.inner-page-hero.hero-detail { height: 650px; padding-bottom: 60px; }

.inner-page-hero::before {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(to top, rgba(0, 20, 60, 0.95) 0%, rgba(0, 40, 90, 0.4) 60%, rgba(0, 0, 0, 0.1) 100%);
  z-index: 1;
}
.inner-page-hero .container { position: relative; z-index: 2; }

/* 面包屑文字强制白色覆盖 */
.breadcrumb-list { display: flex; align-items: center; flex-wrap: wrap; font-size: .88rem; color: rgba(255,255,255,.65); margin-bottom: 20px; }
.breadcrumb-list a { color: rgba(255,255,255,.85); transition: color .2s; }
.breadcrumb-list a:hover { color: #fff; text-decoration: none;}
.breadcrumb-list .sep { margin: 0 8px; opacity: .4; font-size: .78rem; }
.breadcrumb-list .current { color: #fff; font-weight: 600; }

.hero-tag { display: inline-flex; align-items: center; gap: 6px; background: rgba(0,71,157,.85); color: #fff; backdrop-filter: blur(6px); font-size: .75rem; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; padding: 5px 14px; border-radius: 20px; margin-bottom: 20px; }
.hero-title { font-size: clamp(2rem, 4vw, 3.2rem); font-weight: 900; color: #fff; margin: 0; letter-spacing: .02em; line-height: 1.25; max-width: 850px; }
.hero-subtitle, .hero-desc { font-size: clamp(1rem, 2vw, 1.3rem); color: rgba(255,255,255,0.9); margin-top: 15px; font-weight: 400; max-width: 800px; line-height: 1.75; }

/* ============================================
   2. 方案锚点导航
============================================ */
.page-nav-anchor { background: #fff; box-shadow: 0 4px 12px rgba(0,0,0,0.05); z-index: 998; border-bottom: 1px solid #eee; }
.sticky-top { position: sticky; top: 80px; }
.solution-anchor-list { display: flex; align-items: center; justify-content: center; gap: 45px; overflow-x: auto; white-space: nowrap; scrollbar-width: none; }
.solution-anchor-list::-webkit-scrollbar { display: none; }
.solution-anchor-list .anchor-item { display: block; padding: 22px 0; font-size: 1.05rem; font-weight: 500; color: #555; border-bottom: 3px solid transparent; transition: var(--transition); text-decoration: none; cursor: pointer; outline: none;}
.solution-anchor-list .anchor-item:hover { color: var(--primary); text-decoration: none;}
.solution-anchor-list .anchor-item.active { color: var(--primary); font-weight: 700; border-bottom-color: var(--primary); }

/* ============================================
   3. 通用区块基础排版补充
============================================ */
.section-wrap { padding: 90px 0; }
.bg-white { background: #fff; }
.bg-light { background: var(--bg-light); }
.section-header { text-align: center; margin-bottom: 56px; }
.section-eyebrow { font-family: var(--font-en); font-size: 0.85rem; font-weight: 700; letter-spacing: 0.16em; color: var(--primary); text-transform: uppercase; margin-bottom: 12px; opacity: 0.8; display: block;}
.section-title { font-size: clamp(1.8rem, 3.5vw, 2.4rem); font-weight: 800; color: var(--text-dark); letter-spacing: 0.05em; position: relative; display: inline-block; margin-bottom: 16px; }
.section-title::after { content: ''; display: block; width: 58px; height: 4px; background: var(--primary); margin: 16px auto 0; border-radius: 2px; }
.section-subtitle { font-size: 1.1rem; color: var(--text-muted); letter-spacing: 0.02em; max-width: 700px; margin: 0 auto; line-height: 1.7;}
.sub-section-title { font-size: 1.35rem; font-weight: 800; color: var(--text-dark); margin: 40px 0 20px; border-left: 4px solid var(--primary); padding-left: 12px; }

/* 统一入场动画 */
.fu { opacity: 0; transform: translateY(30px); transition: opacity 0.6s ease, transform 0.6s ease; }
.fu.in { opacity: 1; transform: translateY(0); }

/* ============================================
   4. 模块：方案概述 (Overview)
============================================ */
.overview-layout { display: flex; align-items: center; gap: 60px; }
.overview-text { flex: 1; min-width: 0; }
.overview-text .section-header { text-align: left; margin-bottom: 24px; }
.overview-text .section-title::after { margin-left: 0; }
.overview-text .lead { font-size: 1.15rem; font-weight: 600; color: var(--text-body); margin-bottom: 20px; line-height: 1.7; padding-left: 20px; border-left: 4px solid var(--primary); }
.overview-text p { font-size: 1rem; color: var(--text-muted); line-height: 1.8; text-align: justify; margin-bottom: 15px; }
.overview-visual { flex: 0 0 48%; position: relative; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-lg); }
.overview-visual img { width: 100%; height: auto; display: block; transition: transform 0.5s ease; }
.overview-visual:hover img { transform: scale(1.03); }

/* ============================================
   5. 模块：拓扑架构图 (Topology)
============================================ */
/* 这里的 max-width: 1250px 就是控制整个拓扑图模块最大宽度的核心参数 */
.topo-image-container { 
  max-width: 1250px; 
  margin: 0 auto; 
  padding: 0 24px; 
  text-align: center; 
  margin-top: 20px;
}
.topo-image-wrap { 
  width: 100%; 
  margin: 0 auto; 
  text-align: center; 
  display: flex; 
  justify-content: center; /* 确保图片始终居中 */
}

/* 核心优化：去掉了强制的 width: 100%，改为 max-width: 100% */
.topo-image-wrap img { 
  max-width: 100%;   /* 图片最大不会超过父容器的1250px */
  width: auto;       /* 保持图片原有比例，不会被强行拉伸导致模糊 */
  height: auto; 
  border-radius: 16px; 
  box-shadow: 0 12px 40px rgba(0,0,0,0.08); 
  display: block; 
  margin-bottom: 40px; 
}

/* 无人驾驶方案特有的文本说明框 */
.topo-text-box { background: #fff; border: 1px solid var(--border-light); border-radius: 12px; padding: 30px 40px; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 20px; box-shadow: var(--shadow-sm); text-align: left; }
.topo-layer { flex: 1; min-width: 200px; border-left: 4px solid var(--primary); padding-left: 15px;}
.topo-layer-title { font-size: 1.05rem; font-weight: 800; color: var(--primary); margin-bottom: 8px; display: flex; align-items: center; gap: 8px;}
.topo-layer-title::before { content: ''; display: block; width: 6px; height: 6px; border-radius: 50%; background: var(--accent-orange); }
.topo-layer p { font-size: 0.95rem; color: var(--text-muted); margin: 0; line-height: 1.6;}

/* ============================================
   6. 模块：核心功能展示卡片 (Func Grid)
============================================ */
.func-grid-new { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; margin-top: 20px;}
.func-grid-new.cols-2 { grid-template-columns: repeat(2, 1fr); }
.func-card-new { background: #fff; border: 1px solid var(--border-light); border-radius: 16px; padding: 40px 32px; text-align: center; box-shadow: var(--shadow-sm); transition: var(--transition); position: relative; overflow: hidden; }
.func-grid-new.cols-2 .func-card-new { text-align: left; display: flex; align-items: flex-start; gap: 20px; padding: 40px 35px; }
.func-card-new::after { content: ''; position: absolute; bottom: 0; left: 0; right: 0; height: 4px; background: var(--primary); transform: scaleX(0); transition: transform 0.4s ease; transform-origin: left; }
.func-card-new:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); border-color: rgba(0,71,157,0.2); }
.func-card-new:hover::after { transform: scaleX(1); }

.func-icon-new { width: 84px; height: 84px; margin: 0 auto 24px; border-radius: 50%; background: #eef4ff; color: var(--primary); display: flex; align-items: center; justify-content: center; font-size: 2.2rem; transition: var(--transition); }
.func-grid-new.cols-2 .func-icon-new { width: 64px; height: 64px; margin: 0; border-radius: 14px; font-size: 1.8rem; flex-shrink: 0; }
.func-card-new:hover .func-icon-new { background: var(--primary); color: #fff; transform: rotateY(180deg); }
.func-content { flex: 1; }
.func-title-new { font-size: 1.25rem; font-weight: 800; color: var(--text-dark); margin-bottom: 16px; line-height: 1.4;}
.func-grid-new.cols-2 .func-title-new { font-size: 1.2rem; margin-bottom: 12px; }
.func-desc-new { font-size: 0.95rem; color: var(--text-muted); line-height: 1.7; text-align: justify; margin: 0;}
.func-point { font-size: 0.9rem; color: #555; position: relative; padding-left: 12px; margin-bottom: 6px; display: block; line-height: 1.6; text-align: left;}
.func-point::before { content: ''; position: absolute; left: 0; top: 8px; width: 4px; height: 4px; border-radius: 50%; background: var(--accent-orange); }
.func-point strong { color: var(--text-dark); }

/* ============================================
   7. 模块：云平台/中控展示 (Platform)
============================================ */
.platform-container { display: flex; align-items: center; gap: 50px; margin-top: 20px; background: #1a2a40; border-radius: 20px; padding: 50px 40px; box-shadow: var(--shadow-lg); }
.plat-image { flex: 3; border-radius: 12px; overflow: hidden; box-shadow: 0 10px 40px rgba(0,0,0,0.4); }
.plat-image img { width: 100%; display: block; }
.plat-info { flex: 2; color: #fff;}
.plat-info h3 { font-size: 1.6rem; font-weight: 800; margin-bottom: 20px; }
.plat-info p { font-size: 1.05rem; color: rgba(255,255,255,0.7); line-height: 1.8; margin-bottom: 28px; }
.plat-tag-wrap { display: flex; flex-wrap: wrap; gap: 12px; }
.plat-tag { font-size: 0.95rem; color: #fff; background: rgba(255,255,255,0.1); border: 1px solid rgba(255,255,255,0.2); display: flex; align-items: center; gap: 8px; padding: 10px 16px; border-radius: 6px; font-weight: 600;}
.plat-tag i { color: var(--accent-green); font-size: 1.1rem; }

/* ============================================
   8. 模块：客户价值 (Value)
============================================ */
.value-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; margin-top: 20px; }
.value-card { background: #fff; border-radius: 16px; padding: 36px 30px; text-align: left; box-shadow: var(--shadow-sm); border: 1px solid var(--border-light); transition: var(--transition); display: flex; align-items: flex-start; gap: 20px; }
.value-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); border-color: rgba(0,166,90,0.3); }
.value-icon { width: 56px; height: 56px; margin-bottom: 0; flex-shrink: 0; background: #e8f8f1; color: var(--accent-green); border-radius: 12px; display: flex; align-items: center; justify-content: center; font-size: 1.6rem; }
.value-text h4 { font-size: 1.15rem; font-weight: 800; color: var(--text-dark); margin-bottom: 10px; }
.value-text p { font-size: 0.95rem; color: var(--text-muted); line-height: 1.6; margin: 0; }

/* ============================================
   9. 模块：交互网格与协议网格 (无人车页面专属)
============================================ */
.interaction-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 30px; margin-bottom: 60px; margin-top: 20px;}
.interact-card { background: #fff; border: 1px solid var(--border-light); padding: 40px; border-radius: 16px; transition: var(--transition); box-shadow: var(--shadow-sm); }
.interact-card:hover { box-shadow: var(--shadow-md); border-color: rgba(0,71,157,0.2); transform: translateY(-5px); }
.interact-icon { font-size: 2.5rem; color: var(--primary); margin-bottom: 20px; }
.interact-card h4 { font-size: 1.25rem; font-weight: 800; color: var(--text-dark); margin-bottom: 15px; }
.interact-card p { font-size: 0.95rem; color: var(--text-muted); line-height: 1.7; margin: 0; }
.protocol-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; margin-top: 20px; }
.protocol-card { background: #fff; border: 1px solid var(--border-light); padding: 35px 25px; border-radius: 16px; text-align: center; box-shadow: var(--shadow-sm); transition: var(--transition); }
.protocol-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); border-color: rgba(0,166,90,0.3); }
.protocol-icon { width: 70px; height: 70px; border-radius: 50%; background: #e8f8f1; color: var(--accent-green); display: flex; align-items: center; justify-content: center; font-size: 1.8rem; margin: 0 auto 20px; transition: var(--transition); }
.protocol-card:hover .protocol-icon { background: var(--accent-green); color: #fff; }
.protocol-card h4 { font-size: 1.1rem; font-weight: 800; color: var(--text-dark); margin-bottom: 12px; }
.protocol-card p { font-size: 0.9rem; color: var(--text-muted); line-height: 1.6; margin: 0; text-align: justify;}

/* ============================================
   10. 模块：相关产品推荐网格
============================================ */
.ext-products-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; margin-top: 20px;}
.ep-card { display: block; background: #fff; border-radius: var(--radius); border: 1px solid var(--border-light); overflow: hidden; transition: var(--transition); box-shadow: var(--shadow-sm); text-decoration: none !important; }
.ep-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: rgba(0,71,157,0.2); }
.ep-img-wrap { overflow: hidden; border-bottom: 1px solid #f0f2f6; }
.ep-img { width: 100%; aspect-ratio: 4/3; object-fit: cover; transition: transform .5s cubic-bezier(0.2, 0.8, 0.2, 1); }
.ep-card:hover .ep-img { transform: scale(1.08); }
.ep-body { padding: 22px 18px; text-align: center; background: #fff; position: relative; z-index: 2; }
.ep-title { font-size: 1.1rem; font-weight: 600; color: var(--text-dark); margin-bottom: 6px; transition: color .2s; }
.ep-card:hover .ep-title { color: var(--primary); }
.ep-desc { font-size: 0.9rem; color: var(--text-muted); margin: 0; }

/* ============================================
   11. 模块：方案主列表页专属 (solutionlist.html)
============================================ */
.sol-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 40px; margin-top: 20px; }
.sol-card { background: #fff; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-sm); border: 1px solid var(--border-light); transition: var(--transition); display: flex; flex-direction: column; text-decoration: none !important;}
.sol-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); border-color: rgba(0,71,157,0.2); }
.sol-card-img-wrap { position: relative; overflow: hidden; height: 260px; display: block; }
.sol-card-img-wrap img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.6s ease; }
.sol-card:hover .sol-card-img-wrap img { transform: scale(1.06); }
.sol-card-img-overlay { position: absolute; inset: 0; background: linear-gradient(to top, rgba(0,15,50,0.6) 0%, transparent 60%); opacity: 0; transition: opacity 0.3s; pointer-events: none;}
.sol-card:hover .sol-card-img-overlay { opacity: 1; }
.sol-card-body { padding: 32px; display: flex; flex-direction: column; flex: 1; }
.sol-card-title { font-size: 1.35rem; font-weight: 800; color: var(--text-dark); margin-bottom: 12px; transition: color 0.3s; }
.sol-card:hover .sol-card-title { color: var(--primary); }
.sol-card-desc { font-size: 0.98rem; color: var(--text-muted); line-height: 1.75; flex: 1; margin-bottom: 24px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;}
.sol-card-footer { border-top: 1px dashed var(--border-light); padding-top: 20px; display: flex; align-items: center; justify-content: flex-end;}
.sol-card-link { font-size: 0.95rem; font-weight: 700; color: var(--primary); display: flex; align-items: center; gap: 6px; transition: gap 0.3s; text-decoration: none;}
.sol-card-link:hover { gap: 10px; text-decoration: none; color: var(--primary-light); }

/* 为什么选择我们 */
.why-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 30px; margin-top: 20px;}
.why-item { text-align: center; padding: 0 12px; }
.why-icon { width: 72px; height: 72px; border-radius: 50%; margin: 0 auto 20px; background: #EEF5FF; color: var(--primary); display: flex; align-items: center; justify-content: center; font-size: 1.8rem; transition: var(--transition); }
.why-item:hover .why-icon { background: var(--primary); color: #fff; transform: rotateY(180deg); }
.why-item h4 { font-size: 1.15rem; font-weight: 800; color: var(--text-dark); margin-bottom: 10px; }
.why-item p { font-size: 0.95rem; color: var(--text-muted); line-height: 1.7; }

/* 底部 CTA 引导横幅 */
.cta-card { background: linear-gradient(135deg, #07122a 0%, #00479D 60%, #1a6fcc 100%); border-radius: var(--radius); padding: 56px 64px; position: relative; overflow: hidden; display: flex; align-items: center; justify-content: space-between; gap: 40px; box-shadow: var(--shadow-md); }
.cta-card::before { content: ''; position: absolute; top: -40px; right: -40px; width: 280px; height: 280px; border-radius: 50%; background: rgba(255,255,255,0.06); pointer-events: none; }
.cta-text h3 { font-size: clamp(1.5rem, 2.5vw, 2rem); font-weight: 900; color: #fff; margin-bottom: 12px; }
.cta-text p { font-size: 1.05rem; color: rgba(255,255,255,0.75); line-height: 1.7; margin: 0; max-width: 500px;}
.cta-actions { display: flex; gap: 16px; flex-shrink: 0; flex-wrap: wrap; position: relative; z-index: 1; }
.btn-amber { display: inline-flex; align-items: center; gap: 8px; background: var(--accent-amber); color: #00A65A; padding: 14px 32px; border-radius: 50px; font-size: 1.05rem; font-weight: 700; border: 2px solid var(--accent-amber); transition: var(--transition); cursor: pointer; text-decoration: none;}
.btn-amber:hover { background: transparent; color: var(--accent-amber); text-decoration: none;}
.btn-ghost-white { display: inline-flex; align-items: center; gap: 8px; background: transparent; color: #fff; padding: 14px 32px; border-radius: 50px; font-size: 1.05rem; font-weight: 600; border: 2px solid rgba(255,255,255,0.5); transition: var(--transition); cursor: pointer; text-decoration: none;}
.btn-ghost-white:hover { background: rgba(255,255,255,0.1); border-color: #fff; color: #fff; text-decoration: none;}

/* ============================================
   12. 响应式断点适配
============================================ */
@media (max-width: 1199px) {
  .func-grid-new { grid-template-columns: repeat(2, 1fr); }
  .why-grid { grid-template-columns: repeat(2, 1fr); gap: 40px;}
  .protocol-grid { grid-template-columns: repeat(2, 1fr); }
  .ext-products-grid { grid-template-columns: repeat(2, 1fr); }
  .sol-grid { grid-template-columns: 1fr; max-width: 800px; margin: 0 auto; }
}
@media (max-width: 991px) {
  .overview-layout { flex-direction: column; gap: 40px; }
  .overview-visual { width: 100%; }
  .platform-container { flex-direction: column; padding: 40px 30px; gap: 30px;}
  .cta-card { flex-direction: column; text-align: center; gap: 30px; padding: 40px 30px; }
  .cta-text p { margin: 0 auto; }
  .value-grid { grid-template-columns: 1fr; }
  .interaction-grid { grid-template-columns: 1fr; gap: 20px; margin-bottom: 50px;}
}
@media (max-width: 767px) {
  .inner-page-hero.hero-list { height: auto; padding-top: 100px; padding-bottom: 60px; }
  .inner-page-hero.hero-detail { height: auto; padding-top: 100px; padding-bottom: 40px; }
  
  .section-wrap { padding: 60px 0; }
  .section-header { margin-bottom: 40px; } 
  
  .solution-anchor-list { justify-content: flex-start; padding: 0 16px; gap: 20px; }
  .anchor-item { padding: 12px 0; font-size: 0.95rem; }
  
  .func-grid-new, .func-grid-new.cols-2 { grid-template-columns: 1fr; }
  .func-card-new, .func-grid-new.cols-2 .func-card-new { flex-direction: column; text-align: center; align-items: center; padding: 30px 20px;}
  .func-grid-new.cols-2 .func-icon-new { margin-bottom: 16px; }
  .func-point { text-align: left; }
  
  .why-grid { grid-template-columns: 1fr; gap: 30px; }
  .protocol-grid { grid-template-columns: 1fr; }
  .interaction-grid { grid-template-columns: 1fr; }
  .ext-products-grid { grid-template-columns: 1fr; }
  
  .cta-actions { flex-direction: column; width: 100%; }
  .cta-actions a { width: 100%; justify-content: center; }
  .topo-image-container { padding: 0 16px; }
  .topo-text-box { flex-direction: column; padding: 20px; }
}