/* ============================================
   凌波技术有限公司 - 企业官网样式表
   设计风格：简约大气、科技感
   ============================================ */

/* ===== CSS 变量 ===== */
:root {
  --primary: #1a3a5c;
  --primary-light: #2c5282;
  --primary-dark: #0f2942;
  --accent: #00a8a8;
  --accent-light: #14b8b8;
  --accent-dark: #008080;
  --bg: #f7f9fc;
  --surface: #ffffff;
  --text: #1e293b;
  --text-muted: #64748b;
  --text-light: #94a3b8;
  --border: #e2e8f0;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
  --radius: 12px;
  --radius-lg: 20px;
  --max-width: 1200px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== Reset ===== */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial,
    sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

ul {
  list-style: none;
}

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

/* ===== 容器 ===== */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== 头部导航 ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 72px;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  z-index: 1000;
  transition: var(--transition);
}

.header.scrolled {
  box-shadow: var(--shadow-sm);
}

.nav {
  max-width: var(--max-width);
  height: 100%;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: 0.5px;
}

.logo-icon {
  width: 40px;
  height: 40px;
  background: #fff;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 4px;
  overflow: hidden;
}

.logo-icon img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

/* 文字版 logo（凌波技术 LINKPOWER 横版），header/footer 与图形 logo 横排显示 */
.logo-text {
  height: 48px;
  width: auto;
  display: block;
  align-self: center;
  user-select: none;
  -webkit-user-drag: none;
}

/* footer 深色背景上把文字 logo 反白显示（源图是黑色文字） */
.footer-brand .logo-text {
  filter: brightness(0) invert(1);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 36px;
}

.nav-links a {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-muted);
  position: relative;
  padding: 6px 0;
}

.nav-links a:hover {
  color: var(--primary);
}

.nav-links a.active {
  color: var(--primary);
}

.nav-links a.active::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
}

/* ===== 导航下拉菜单 ===== */
.nav-item {
  position: relative;
}

.nav-item > a {
  display: flex;
  align-items: center;
  gap: 5px;
}

.dropdown-arrow {
  font-size: 10px;
  line-height: 1;
  transition: transform 0.25s ease;
}

.nav-item:hover .dropdown-arrow {
  transform: rotate(180deg);
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(10px);
  background: var(--surface);
  min-width: 150px;
  border-radius: 10px;
  box-shadow: 0 12px 32px rgba(15, 41, 66, 0.16);
  padding: 8px;
  opacity: 0;
  visibility: hidden;
  transition: all 0.25s ease;
  z-index: 200;
  list-style: none;
}

.nav-item:hover .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(4px);
}

.dropdown-menu li + li {
  margin-top: 2px;
}

.dropdown-menu a {
  display: block;
  padding: 10px 16px;
  font-size: 14px;
  font-weight: 500;
  color: var(--primary-dark) !important;
  border-radius: 6px;
  white-space: nowrap;
  text-align: center;
}

.dropdown-menu a:hover {
  background: rgba(0, 168, 168, 0.08);
  color: var(--accent) !important;
}

.dropdown-menu a.active {
  color: var(--accent) !important;
  background: rgba(0, 168, 168, 0.08);
}

.dropdown-menu a::after {
  display: none !important;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
  transition: var(--transition);
}

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: var(--transition);
  white-space: nowrap;
}

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

.btn-primary:hover {
  background: var(--accent-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 168, 168, 0.35);
}

.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
}

.btn-outline:hover {
  background: var(--primary);
  color: #fff;
  transform: translateY(-2px);
}

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

.btn-white:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-ghost {
  background: transparent;
  color: #fff;
  border: 2px solid rgba(255, 255, 255, 0.5);
}

.btn-ghost:hover {
  background: #fff;
  color: var(--primary);
  border-color: #fff;
}

/* ===== 通用 Section ===== */
.section {
  padding: 100px 0;
}

.section-sm {
  padding: 60px 0;
}

.section-title {
  text-align: center;
  margin-bottom: 60px;
}

.section-title h2 {
  font-size: 36px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 16px;
  letter-spacing: 1px;
}

.section-title p {
  font-size: 17px;
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto;
}

.section-title .divider {
  width: 48px;
  height: 3px;
  background: var(--accent);
  border-radius: 3px;
  margin: 0 auto 20px;
}

/* ===== Hero 区域 ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, rgba(15, 41, 66, 0.88) 0%, rgba(26, 58, 92, 0.82) 40%, rgba(44, 82, 130, 0.7) 100%), url("../images/hero-bg.png");
  background-size: cover;
  background-position: center right;
  background-attachment: fixed;
  overflow: hidden;
  padding-top: 72px;
}

.hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='60' height='60' viewBox='0 0 60 60'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  z-index: 1;
}

.hero::after {
  content: "";
  position: absolute;
  bottom: -200px;
  right: -200px;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(0, 168, 168, 0.15) 0%, transparent 70%);
  border-radius: 50%;
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 700px;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: rgba(0, 168, 168, 0.2);
  border: 1px solid rgba(0, 168, 168, 0.4);
  border-radius: 30px;
  font-size: 13px;
  color: #5eead4;
  margin-bottom: 24px;
  font-weight: 500;
}

.hero-tag .dot {
  width: 8px;
  height: 8px;
  background: #5eead4;
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.3); }
}

.hero h1 {
  font-size: 56px;
  font-weight: 800;
  color: #fff;
  line-height: 1.25;
  margin-bottom: 24px;
  letter-spacing: 2px;
}

.hero h1 .highlight {
  background: linear-gradient(135deg, #5eead4, #00a8a8);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 18px;
  color: rgba(255, 255, 255, 0.75);
  line-height: 1.8;
  margin-bottom: 40px;
  max-width: 560px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-stats {
  display: flex;
  gap: 48px;
  margin-top: 64px;
}

.hero-stat .num {
  font-size: 40px;
  font-weight: 800;
  color: #fff;
  line-height: 1;
}

.hero-stat .num span {
  font-size: 20px;
  color: var(--accent-light);
}

.hero-stat .label {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
  margin-top: 8px;
}

/* ===== 业务板块卡片 ===== */
.services-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
}

.service-card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 40px 28px;
  text-align: center;
  border: 1px solid var(--border);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--accent);
  transform: scaleX(0);
  transition: var(--transition);
  transform-origin: left;
}

.service-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

.service-card:hover::before {
  transform: scaleX(1);
}

.service-icon {
  width: 72px;
  height: 72px;
  margin: 0 auto 24px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
  background: linear-gradient(135deg, rgba(0, 168, 168, 0.1), rgba(26, 58, 92, 0.08));
}

.service-card h3 {
  font-size: 19px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 12px;
}

.service-card p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ===== 核心优势 ===== */
.advantages {
  background: var(--primary);
  color: #fff;
}

.advantages .section-title h2 {
  color: #fff;
}

.advantages .section-title p {
  color: rgba(255, 255, 255, 0.7);
}

.advantages-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}

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

.advantage-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 20px;
  border-radius: 50%;
  background: rgba(0, 168, 168, 0.15);
  border: 2px solid rgba(0, 168, 168, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
}

.advantage-item h4 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 10px;
}

.advantage-item p {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.65);
  line-height: 1.7;
}

/* ===== 数据展示区 ===== */
.stats-band {
  background: var(--surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  text-align: center;
}

.stat-block .num {
  font-size: 48px;
  font-weight: 800;
  color: var(--accent);
  line-height: 1;
}

.stat-block .num span {
  font-size: 24px;
}

.stat-block .label {
  font-size: 15px;
  color: var(--text-muted);
  margin-top: 12px;
}

/* ===== CTA 区域 ===== */
.cta-section {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: "";
  position: absolute;
  top: -150px;
  left: -150px;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(0, 168, 168, 0.15) 0%, transparent 70%);
  border-radius: 50%;
}

.cta-section .container {
  position: relative;
  z-index: 2;
}

.cta-section h2 {
  font-size: 36px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
}

.cta-section p {
  font-size: 17px;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 36px;
}

/* ===== 页面 Banner ===== */
.page-banner {
  padding: 160px 0 80px;
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 60%, var(--primary-light) 100%);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-banner::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='60' height='60' viewBox='0 0 60 60'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.page-banner::after {
  content: "";
  position: absolute;
  bottom: -100px;
  right: -100px;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(0, 168, 168, 0.12) 0%, transparent 70%);
  border-radius: 50%;
}

.page-banner .container {
  position: relative;
  z-index: 2;
}

.page-banner h1 {
  font-size: 42px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 16px;
  letter-spacing: 2px;
}

.page-banner p {
  font-size: 17px;
  color: rgba(255, 255, 255, 0.7);
  max-width: 600px;
  margin: 0 auto;
}

.breadcrumb {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 24px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.5);
}

.breadcrumb a:hover {
  color: var(--accent-light);
}

/* ===== 关于我们 - 公司介绍 ===== */
.about-intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.about-intro-text h2 {
  font-size: 32px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 20px;
}

.about-intro-text p {
  font-size: 16px;
  color: var(--text-muted);
  line-height: 2;
  margin-bottom: 16px;
}

.about-intro-visual {
  position: relative;
}

.about-visual-card {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: var(--radius-lg);
  padding: 48px;
  color: #fff;
  box-shadow: var(--shadow-lg);
}

.about-visual-card .big-num {
  font-size: 64px;
  font-weight: 800;
  line-height: 1;
  margin-bottom: 8px;
}

.about-visual-card .big-num span {
  font-size: 28px;
}

.about-visual-card .desc {
  font-size: 15px;
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 32px;
}

.about-visual-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.about-visual-list li {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 15px;
  color: rgba(255, 255, 255, 0.9);
}

.about-visual-list li::before {
  content: "";
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  flex-shrink: 0;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: center;
  background-size: 12px;
}

/* ===== 发展历程 ===== */
.timeline {
  position: relative;
  max-width: 900px;
  margin: 0 auto;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--border);
  transform: translateX(-50%);
}

.timeline-item {
  display: flex;
  align-items: flex-start;
  margin-bottom: 60px;
  position: relative;
}

.timeline-item:nth-child(odd) {
  flex-direction: row-reverse;
}

.timeline-item:nth-child(odd) .timeline-content {
  text-align: right;
  margin-right: 60px;
}

.timeline-item:nth-child(even) .timeline-content {
  margin-left: 60px;
}

.timeline-dot {
  position: absolute;
  left: 50%;
  top: 8px;
  transform: translateX(-50%);
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--accent);
  border: 3px solid #fff;
  box-shadow: 0 0 0 3px var(--accent);
  z-index: 2;
}

.timeline-content {
  /* 原 calc(50% - 30px) 会越过中线 30px，说明文字贴到中间线上；
     改为 -120px（60px 侧边距 + 60px 中线留白），文字与中竖线保持清晰间距 */
  width: calc(50% - 120px);
}

.timeline-year {
  font-size: 24px;
  font-weight: 800;
  color: var(--accent);
  margin-bottom: 8px;
}

.timeline-title {
  font-size: 17px;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 8px;
}

.timeline-desc {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ===== 企业文化 ===== */
.culture-section {
  background: var(--bg);
}

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

.culture-card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 32px 22px;
  text-align: center;
  border: 1px solid var(--border);
  transition: var(--transition);
}

.culture-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.culture-card .icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 24px;
  border-radius: 16px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  color: #fff;
}

.culture-card h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 12px;
}

.culture-card p {
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.8;
}

/* ===== 产品介绍 - 详细板块 ===== */
.product-section {
  padding: 80px 0;
}

.product-section:nth-child(even) {
  background: var(--bg);
}

.product-detail {
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: auto 1fr;
  gap: 0 60px;
}

/* 通栏头部：标签 + 标题，独占一行（显式定位，避免自动排位错乱） */
.product-head {
  grid-column: 1 / -1;
  grid-row: 1;
}

/* 正文行：文字与方块各占一列，行高拉伸对齐 */
.product-detail .product-text {
  grid-column: 1;
  grid-row: 2;
}

.product-detail .product-visual {
  grid-column: 2;
  grid-row: 2;
}

.product-head .label {
  display: inline-block;
  padding: 4px 14px;
  background: rgba(0, 168, 168, 0.1);
  color: var(--accent);
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 16px;
}

.product-head h2 {
  font-size: 30px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 20px;
}

.product-text {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

/* 文字列较低时，把“了解详情”按钮压到与方块底部齐平 */
.product-text .detail-btn-wrap {
  margin-top: auto;
  padding-top: 28px;
}

/* 反向布局：方块靠左、文字靠右（仅交换列位置，行不变） */
.product-detail.reverse .product-text {
  grid-column: 2;
}

.product-detail.reverse .product-visual {
  grid-column: 1;
}

.product-text > p {
  font-size: 16px;
  color: var(--text-muted);
  line-height: 1.9;
  margin-bottom: 24px;
}

.product-features {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

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

.product-feature .check {
  width: 24px;
  height: 24px;
  border-radius: 6px;
  background: rgba(0, 168, 168, 0.12);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 14px;
  font-weight: 700;
}

.product-feature .feature-content h4 {
  font-size: 16px;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 4px;
}

.product-feature .feature-content p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
}

.product-visual {
  position: relative;
  display: flex;
}

/* 方块拉伸填满所在行：顶部与描述文字首行齐平，底部与“了解详情”按钮下缘齐平 */
.product-visual-card {
  flex: 1;
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border);
}

.product-visual-card .pv-icon {
  width: 80px;
  height: 80px;
  border-radius: 18px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 36px;
  color: #fff;
  margin-bottom: 24px;
}

.product-visual-card h3 {
  font-size: 22px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 16px;
}

.product-visual-card .pv-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.product-visual-card .pv-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--text);
}

.product-visual-card .pv-list li::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  flex-shrink: 0;
}

/* ===== 产品页 - 锚点导航 ===== */
.product-tabs {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px;
  margin: -40px auto 0;
  position: relative;
  z-index: 10;
  max-width: 820px;
}

.product-tabs a {
  display: inline-block;
  padding: 10px 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 30px;
  font-size: 14px;
  font-weight: 500;
  color: var(--primary);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.product-tabs a:hover {
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: var(--shadow);
}

/* ===== 方案介绍 ===== */
.solution-section {
  padding: 80px 0;
}

.solution-section:nth-child(even) {
  background: var(--bg);
}

.solution-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

.solution-card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  padding: 36px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.solution-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  opacity: 0.7;
}

.solution-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.solution-card .sc-tag {
  display: inline-block;
  align-self: flex-start;
  padding: 4px 14px;
  background: rgba(0, 168, 168, 0.1);
  color: var(--accent);
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
}

.solution-card h3 {
  font-size: 22px;
  font-weight: 700;
  color: var(--primary);
}

.solution-card .sc-desc {
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.8;
}

.solution-card .sc-pain {
  background: #fdf3f3;
  border-left: 3px solid #e05d5d;
  padding: 10px 14px;
  border-radius: 0 8px 8px 0;
  font-size: 13px;
  color: #8a4b4b;
  line-height: 1.7;
}

.solution-card .sc-modules {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 4px;
}

.solution-card .sc-modules li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
  color: var(--text);
  line-height: 1.6;
}

.solution-card .sc-modules li::before {
  content: "✓";
  color: var(--accent);
  font-weight: 700;
  flex-shrink: 0;
}

.solution-card .sc-value {
  margin-top: auto;
  padding-top: 16px;
  border-top: 1px dashed var(--border);
  font-size: 14px;
  color: var(--primary);
  font-weight: 600;
}

.solution-card .sc-value span {
  color: var(--accent);
}

/* ===== 方案流程 ===== */
.solution-flow {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.flow-step {
  text-align: center;
  padding: 32px 20px;
  background: var(--surface);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.flow-step:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.flow-step .fs-num {
  width: 48px;
  height: 48px;
  margin: 0 auto 16px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  font-size: 20px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

.flow-step h4 {
  font-size: 16px;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 8px;
}

.flow-step p {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ===== 联系我们 ===== */
.contact-wrapper {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 48px;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.contact-info-item {
  display: flex;
  gap: 20px;
  align-items: flex-start;
}

.contact-info-item .ci-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  color: #fff;
  flex-shrink: 0;
}

.contact-info-item h4 {
  font-size: 17px;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 6px;
}

.contact-info-item p {
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.7;
}

.contact-form {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 40px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.contact-form h3 {
  font-size: 22px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 28px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 8px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  font-size: 15px;
  font-family: inherit;
  background: var(--bg);
  color: var(--text);
  transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(0, 168, 168, 0.1);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.form-message {
  padding: 12px 16px;
  border-radius: 8px;
  font-size: 14px;
  margin-bottom: 20px;
  display: none;
}

.form-message.success {
  display: block;
  background: rgba(0, 168, 168, 0.1);
  color: var(--accent-dark);
  border: 1px solid rgba(0, 168, 168, 0.3);
}

.form-message.error {
  display: block;
  background: rgba(224, 92, 92, 0.08);
  color: #c0392b;
  border: 1px solid rgba(224, 92, 92, 0.3);
}

/* ===== 地图区域 ===== */
.map-section {
  background: var(--surface);
  border-top: 1px solid var(--border);
}

.map-placeholder {
  width: 100%;
  border-radius: var(--radius-lg);
  position: relative;
  overflow: hidden;
  background: var(--surface);
  border: 1px solid var(--border);
}

.map-placeholder img {
  width: 100%;
  height: auto;
  display: block;
}

.map-marker {
  position: absolute;
  left: 47%;
  top: 31%;
  width: 24px;
  height: 24px;
  z-index: 3;
}

.map-marker::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 24px;
  height: 24px;
  background: var(--accent);
  border-radius: 50% 50% 50% 0;
  transform: rotate(-45deg);
  box-shadow: 0 4px 16px rgba(0, 168, 168, 0.5);
  animation: mapPinPulse 2s ease-in-out infinite;
}

@keyframes mapPinPulse {
  0%, 100% { transform: rotate(-45deg) scale(1); box-shadow: 0 4px 16px rgba(0, 168, 168, 0.5); }
  50% { transform: rotate(-45deg) scale(1.1); box-shadow: 0 6px 20px rgba(0, 168, 168, 0.7); }
}

.map-label {
  position: absolute;
  left: 32px;
  top: 50%;
  transform: translateY(-50%);
  background: #fff;
  padding: 10px 14px;
  border-radius: 8px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
  line-height: 1.6;
  white-space: nowrap;
  pointer-events: none;
}

.map-label::before {
  content: "";
  position: absolute;
  left: -6px;
  top: 50%;
  transform: translateY(-50%);
  width: 0;
  height: 0;
  border-top: 6px solid transparent;
  border-bottom: 6px solid transparent;
  border-right: 6px solid #fff;
}

.map-address-overlay {
  display: none;
}

.map-pin {
  display: none;
}

/* ===== FAQ ===== */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 16px;
  overflow: hidden;
  transition: var(--transition);
}

.faq-item.active {
  border-color: var(--accent);
  box-shadow: var(--shadow-sm);
}

.faq-question {
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  color: var(--primary);
}

.faq-question .arrow {
  transition: var(--transition);
  color: var(--accent);
  font-size: 18px;
}

.faq-item.active .arrow {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.faq-item.active .faq-answer {
  max-height: 300px;
}

.faq-answer p {
  padding: 0 24px 20px;
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.8;
}

/* ===== FAQ 空状态 ===== */
.faq-empty {
  max-width: 800px;
  margin: 0 auto;
  padding: 48px 24px;
  text-align: center;
  color: var(--text-light);
  background: var(--surface);
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  font-size: 15px;
}

/* ===== FAQ 更多问题按钮 ===== */
.faq-more-wrap {
  max-width: 800px;
  margin: 28px auto 0;
  text-align: center;
}

.faq-more-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 32px;
  font-size: 15px;
  font-weight: 600;
  border-radius: 999px;
}

.faq-more-btn .faq-more-arrow {
  transition: transform 0.3s ease;
}

.faq-more-btn:hover .faq-more-arrow {
  transform: translateX(4px);
}

.faq-more-btn .faq-back-arrow {
  transition: transform 0.3s ease;
}

.faq-more-btn:hover .faq-back-arrow {
  transform: translateX(-4px);
}

/* ===== FAQ 完整页：返回按钮（Banner 内） ===== */
.faq-back-btn {
  display: inline-block;
  margin-top: 22px;
  padding: 9px 24px;
  font-size: 14px;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.92);
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.35);
  border-radius: 999px;
  backdrop-filter: blur(4px);
  transition: var(--transition);
}

.faq-back-btn:hover {
  background: rgba(255, 255, 255, 0.22);
  transform: translateY(-2px);
}

/* ===== FAQ 完整页：搜索区域 ===== */
.faq-search-wrap {
  max-width: 640px;
  margin: 0 auto;
  position: relative;
  z-index: 20;
}

.faq-search-box {
  position: relative;
  display: flex;
  align-items: center;
  background: var(--surface);
  border: 2px solid var(--border);
  border-radius: 999px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.faq-search-box:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px rgba(0, 168, 168, 0.12), var(--shadow);
}

.faq-search-icon {
  padding: 0 4px 0 20px;
  font-size: 16px;
  color: var(--text-light);
}

.faq-search-box input {
  flex: 1;
  border: none;
  outline: none;
  background: transparent;
  padding: 14px 8px;
  font-size: 15px;
  color: var(--text);
  min-width: 0;
}

.faq-search-box input::placeholder {
  color: var(--text-light);
}

.faq-search-clear {
  display: none;
  padding: 0 20px 0 4px;
  font-size: 14px;
  color: var(--text-light);
  cursor: pointer;
  line-height: 1;
  user-select: none;
}

.faq-search-clear:hover {
  color: var(--primary);
}

/* ===== FAQ 搜索下拉候选 ===== */
.faq-suggest {
  display: none;
  position: absolute;
  top: calc(100% + 10px);
  left: 0;
  right: 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  max-height: 320px;
  overflow-y: auto;
  animation: faqSuggestIn 0.18s ease;
}

@keyframes faqSuggestIn {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: translateY(0); }
}

.suggest-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 13px 18px;
  font-size: 14px;
  color: var(--text);
  cursor: pointer;
  border-bottom: 1px solid var(--border);
  transition: background 0.2s;
}

.suggest-item:last-child {
  border-bottom: none;
}

.suggest-item:hover {
  background: var(--bg);
}

.suggest-q {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.suggest-q .hl {
  font-style: normal;
  color: var(--accent-dark);
  font-weight: 700;
  background: rgba(0, 168, 168, 0.12);
  border-radius: 3px;
  padding: 0 2px;
}

.suggest-go {
  flex-shrink: 0;
  font-size: 12px;
  color: var(--accent);
  font-weight: 600;
}

.suggest-empty {
  padding: 20px 18px;
  text-align: center;
  font-size: 14px;
  color: var(--text-light);
}

/* ===== FAQ 定位高亮动画 ===== */
.highlight-flash {
  animation: faqHighlight 1.6s ease;
}

@keyframes faqHighlight {
  0% { box-shadow: 0 0 0 4px rgba(0, 168, 168, 0.35); background: rgba(0, 168, 168, 0.08); }
  60% { box-shadow: 0 0 0 4px rgba(0, 168, 168, 0.18); background: rgba(0, 168, 168, 0.04); }
  100% { box-shadow: var(--shadow-sm); background: var(--surface); }
}

@media (max-width: 768px) {
  .faq-back-btn {
    font-size: 13px;
    padding: 8px 18px;
  }
  .faq-search-box input {
    font-size: 14px;
    padding: 12px 8px;
  }
}


/* ===== 页脚 ===== */
.footer {
  background: var(--primary-dark);
  color: rgba(255, 255, 255, 0.7);
  padding: 64px 0 0;
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand .logo {
  color: #fff;
  margin-bottom: 16px;
}

.footer-brand p {
  font-size: 14px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.5);
  max-width: 320px;
}

.footer-col h4 {
  font-size: 16px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 20px;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-col ul a {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.5);
}

.footer-col ul a:hover {
  color: var(--accent-light);
}

.footer-bottom {
  padding: 24px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.4);
}

.footer-bottom a {
  color: rgba(255, 255, 255, 0.4);
}

.footer-bottom a:hover {
  color: var(--accent-light);
}

/* ===== 新闻中心 ===== */
.news-filter {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 8px;
}

.filter-btn {
  padding: 9px 24px;
  border-radius: 30px;
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text);
  font-size: 14px;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.25s;
}

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

.filter-btn.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.news-card {
  display: flex;
  flex-direction: column;
  background: #fff;
  border-radius: 14px;
  overflow: hidden;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  transition: all 0.3s ease;
  text-decoration: none;
}

.news-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 16px 40px rgba(26, 58, 92, 0.14);
  border-color: var(--accent);
}

.news-cover {
  height: 190px;
  background-size: cover;
  background-position: center;
  background-color: var(--primary);
  position: relative;
}

.news-cover-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 60%, var(--primary-light) 100%);
}

.news-cover-placeholder span {
  color: rgba(255, 255, 255, 0.55);
  font-size: 20px;
  letter-spacing: 6px;
  font-weight: 300;
}

.news-body {
  padding: 22px 22px 18px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.news-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 12.5px;
  color: var(--text-light);
  margin-bottom: 10px;
}

.news-cat {
  display: inline-block;
  padding: 3px 12px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 500;
}

.cat-blue { background: #e8f4fb; color: #1a6fb5; }
.cat-green { background: #e6f7f2; color: #0d8a6b; }
.cat-orange { background: #fff3e0; color: #d9800a; }
.cat-purple { background: #f0eafc; color: #6b4fc4; }
.cat-gray { background: #f0f2f5; color: #7a8494; }

.news-body h3 {
  font-size: 17px;
  line-height: 1.55;
  color: var(--text);
  margin-bottom: 10px;
  font-weight: 600;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.news-body > p {
  font-size: 13.5px;
  color: var(--text-light);
  line-height: 1.7;
  margin-bottom: 14px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  flex: 1;
}

.news-foot {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12.5px;
  color: var(--text-light);
  padding-top: 12px;
  border-top: 1px solid #f0f2f5;
}

.news-foot .more {
  color: var(--accent);
  font-weight: 500;
}

.news-pagination {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 44px;
  flex-wrap: wrap;
}

.news-pagination .page-btn {
  min-width: 38px;
  height: 38px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: #fff;
  font-size: 14px;
  color: var(--text);
  font-family: inherit;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
}

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

.news-pagination .page-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.news-pagination .page-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.news-empty {
  text-align: center;
  padding: 70px 20px;
  color: var(--text-light);
  font-size: 15px;
}

/* ===== 新闻详情 ===== */
.news-article {
  background: #fff;
  border-radius: 16px;
  padding: 46px 52px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
}

.article-head {
  text-align: center;
  padding-bottom: 28px;
  border-bottom: 1px solid #eef1f5;
  margin-bottom: 34px;
}

.article-head h1 {
  font-size: 28px;
  line-height: 1.5;
  color: var(--text);
  margin: 14px 0;
}

.article-meta {
  display: flex;
  justify-content: center;
  gap: 22px;
  font-size: 13px;
  color: var(--text-light);
  flex-wrap: wrap;
}

.article-cover {
  width: 100%;
  border-radius: 12px;
  margin-bottom: 28px;
  display: block;
}

.article-content {
  font-size: 15.5px;
  line-height: 2;
  color: #3d4757;
}

.article-content p {
  margin: 0 0 18px;
}

.article-content h2 {
  font-size: 21px;
  color: var(--text);
  margin: 30px 0 14px;
}

.article-content h3 {
  font-size: 18px;
  color: var(--text);
  margin: 26px 0 12px;
}

.article-content ul,
.article-content ol {
  margin: 0 0 18px;
  padding-left: 26px;
}

.article-content li {
  margin-bottom: 6px;
}

.article-content blockquote {
  border-left: 4px solid var(--accent);
  background: #f2fbfb;
  padding: 14px 20px;
  margin: 0 0 20px;
  color: var(--text-light);
  border-radius: 0 8px 8px 0;
}

.article-content img {
  max-width: 100%;
  border-radius: 10px;
  margin: 10px 0;
  display: block;
}

.article-content a {
  color: var(--accent);
  text-decoration: underline;
}

.article-content .video-embed {
  margin: 20px 0;
}

.article-content .video-embed iframe {
  width: 100%;
  height: 440px;
  border: none;
  border-radius: 12px;
  display: block;
}

.article-content .video-embed .video-tag {
  font-size: 12px;
  color: var(--text-light);
  text-align: center;
  margin-top: 8px;
}

.article-back {
  margin-top: 38px;
  padding-top: 24px;
  border-top: 1px solid #eef1f5;
  text-align: center;
}

.article-loading,
.article-notfound {
  text-align: center;
  padding: 70px 20px;
  color: var(--text-light);
}

.article-notfound h2 {
  font-size: 22px;
  color: var(--text);
  margin-bottom: 10px;
}

.article-notfound p {
  margin-bottom: 24px;
}

.related-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.related-item {
  display: block;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  transition: all 0.25s;
  text-decoration: none;
}

.related-item:hover {
  transform: translateY(-3px);
  border-color: var(--accent);
  box-shadow: var(--shadow);
}

.related-item h4 {
  font-size: 14.5px;
  color: var(--text);
  line-height: 1.6;
  margin-bottom: 8px;
  font-weight: 500;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.related-item p {
  font-size: 12.5px;
  color: var(--text-light);
}

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

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================
   产品技术 / 行业方案 - 了解详情按钮与详情页
   ============================================ */

/* ===== 列表页“了解详情”按钮 ===== */
.detail-btn-wrap {
  margin-top: 28px;
}

.solution-card .detail-btn-wrap {
  margin-top: auto;
  padding-top: 6px;
}

.btn-detail {
  background: transparent;
  color: var(--accent);
  border: 2px solid var(--accent);
  padding: 10px 26px;
  font-size: 14px;
}

.btn-detail:hover {
  background: var(--accent);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 168, 168, 0.3);
}

/* ===== 首页：5 个产品卡片自适应排布（3+2 居中）===== */
.services-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 28px;
}

.services-grid .service-card {
  flex: 0 1 calc((100% - 56px) / 3);
  min-width: 260px;
}

/* ===== 详情页 - 概览区 ===== */
.detail-root {
  display: block;
}

.detail-hero {
  padding: 72px 0 64px;
  background: var(--surface);
}

.detail-hero-grid {
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  gap: 56px;
  align-items: center;
}

.detail-hero-text .label {
  display: inline-block;
  padding: 4px 14px;
  background: rgba(0, 168, 168, 0.1);
  color: var(--accent);
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 16px;
}

.detail-hero-text h2 {
  font-size: 30px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 20px;
  line-height: 1.4;
}

.detail-intro p {
  font-size: 15.5px;
  color: var(--text-muted);
  line-height: 1.9;
  margin-bottom: 14px;
}

.detail-intro p:last-child {
  margin-bottom: 0;
}

.detail-metrics {
  display: flex;
  flex-wrap: wrap;
  gap: 32px;
  margin: 28px 0 4px;
  padding: 22px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.dm-item {
  min-width: 88px;
}

.dm-num {
  font-size: 24px;
  font-weight: 700;
  color: var(--accent);
  line-height: 1.3;
  letter-spacing: 0.5px;
}

.dm-label {
  font-size: 13px;
  color: var(--text-light);
  margin-top: 2px;
}

.detail-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.detail-hero-card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border);
}

.detail-hero-card .pv-icon {
  width: 80px;
  height: 80px;
  border-radius: 18px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 30px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 24px;
}

.detail-hero-card h3 {
  font-size: 22px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 16px;
}

.detail-hero-card .pv-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.detail-hero-card .pv-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
  color: var(--text);
  line-height: 1.6;
}

.detail-hero-card .pv-list li::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  flex-shrink: 0;
  margin-top: 7px;
}

/* ===== 详情页 - 内容板块 ===== */
.detail-section {
  padding: 72px 0;
}

.detail-root > .detail-section:nth-child(even) {
  background: var(--bg);
}

.detail-feature-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 26px 40px;
}

.detail-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.detail-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  position: relative;
  transition: var(--transition);
}

.detail-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 24px;
  bottom: 24px;
  width: 3px;
  border-radius: 3px;
  background: linear-gradient(180deg, var(--primary), var(--accent));
  opacity: 0.55;
}

.detail-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
  border-color: transparent;
}

.detail-card h4 {
  font-size: 16.5px;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 10px;
  padding-left: 14px;
}

.detail-card p {
  font-size: 14.5px;
  color: var(--text-muted);
  line-height: 1.8;
  padding-left: 14px;
}

/* ===== 详情页 - 参数表 ===== */
.spec-table {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.spec-row {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 20px;
  padding: 16px 28px;
  border-bottom: 1px solid var(--border);
}

.spec-row:last-child {
  border-bottom: none;
}

.spec-row:nth-child(even) {
  background: #fafbfd;
}

.spec-key {
  font-size: 14.5px;
  font-weight: 600;
  color: var(--primary);
}

.spec-val {
  font-size: 14.5px;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ===== 详情页 - 体系架构 ===== */
.detail-arch {
  background: var(--bg);
}

.detail-arch .arch-text {
  max-width: 880px;
  margin: 0 auto 48px;
  text-align: center;
  font-size: 15.5px;
  color: var(--text-muted);
  line-height: 2;
}

.arch-group {
  max-width: 1080px;
  margin: 0 auto 44px;
}

.arch-group:last-child {
  margin-bottom: 0;
}

.arch-group h3 {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 20px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 8px;
}

.arch-group h3::before {
  content: "";
  width: 4px;
  height: 20px;
  border-radius: 2px;
  background: var(--accent);
}

.arch-group > p {
  font-size: 14.5px;
  color: var(--text-muted);
  margin: 0 0 20px 16px;
}

.arch-grid {
  display: grid;
  gap: 24px;
  margin-top: 18px;
}

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

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

.arch-figure {
  margin: 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.arch-figure:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.arch-figure img {
  display: block;
  width: 100%;
  height: 230px;
  object-fit: cover;
}

.arch-grid-3 .arch-figure {
  background: var(--bg);
  border: 1px solid var(--border);
}

.arch-grid-3 .arch-figure img {
  object-fit: contain;
  padding: 16px;
  background: transparent;
  mix-blend-mode: multiply;
}

.arch-figure figcaption {
  padding: 12px 16px;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--text);
  text-align: center;
  border-top: 1px solid var(--border);
  background: var(--surface);
}

/* ===== 详情页 - 实现原理 ===== */
.detail-principle {
  background: var(--bg);
}

.principle-row {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 44px;
  align-items: center;
  max-width: 1080px;
  margin: 0 auto;
}

.principle-row + .principle-row {
  margin-top: 52px;
}

.principle-figure {
  margin: 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.principle-figure:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.principle-figure img {
  display: block;
  width: 100%;
  height: auto;
}

.principle-figure figcaption {
  padding: 12px 16px;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--text);
  text-align: center;
  border-top: 1px solid var(--border);
  background: var(--surface);
}

.principle-row-text h3 {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 21px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 14px;
}

.principle-row-text h3::before {
  content: "";
  flex: none;
  width: 4px;
  height: 22px;
  border-radius: 2px;
  background: var(--accent);
}

.principle-row-text p {
  font-size: 15px;
  color: var(--text-muted);
  line-height: 2;
  margin: 0;
}

.principle-flow {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
  max-width: 1080px;
  margin: 52px auto 0;
}

.principle-step {
  position: relative;
  padding: 28px 24px 26px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.principle-step:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.principle-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  margin-bottom: 16px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color: #fff;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.5px;
}

.principle-step h4 {
  font-size: 16px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 10px;
  line-height: 1.5;
}

.principle-step p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.85;
  margin: 0;
}

.principle-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
  max-width: 860px;
  margin: 26px auto 0;
}

.principle-stat {
  text-align: center;
  padding: 30px 20px 26px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-top: 3px solid var(--accent);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.principle-stat:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.principle-stat .ps-num {
  font-size: 34px;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.2;
}

.principle-stat .ps-label {
  margin-top: 8px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-muted);
}

/* ===== 详情页 - 相关案例轮播 ===== */
.cases-marquee {
  overflow: hidden;
  margin-top: 46px;
  padding: 4px 0 10px;
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 5%, #000 95%, transparent);
  mask-image: linear-gradient(90deg, transparent, #000 5%, #000 95%, transparent);
}

.cases-track {
  display: flex;
  width: max-content;
  animation: casesScroll 55s linear infinite;
}

.cases-marquee:hover .cases-track {
  animation-play-state: paused;
}

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

@media (prefers-reduced-motion: reduce) {
  .cases-track {
    animation: none;
  }
}

.cases-group {
  display: flex;
}

.case-card {
  flex: none;
  width: 300px;
  margin-right: 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

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

.case-card img {
  display: block;
  width: 100%;
  height: 190px;
  object-fit: cover;
}

.case-card h4 {
  padding: 12px 14px;
  font-size: 14.5px;
  font-weight: 600;
  color: var(--text);
  text-align: center;
  border-top: 1px solid var(--border);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ===== 详情页 - 社区AI版式（画廊 + 时间线） ===== */
.community-gallery {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
  max-width: 1080px;
  margin: 0 auto;
}

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

.principle-stats-4 {
  grid-template-columns: repeat(4, 1fr);
  max-width: 1080px;
}

.community-card {
  margin: 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
  display: flex;
  flex-direction: column;
}

.community-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow);
}

.community-card img {
  display: block;
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.community-card figcaption {
  padding: 18px 20px 20px;
  border-top: 1px solid var(--border);
}

.community-card h4 {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 16.5px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 8px;
}

.community-card h4::before {
  content: "";
  flex: none;
  width: 4px;
  height: 16px;
  border-radius: 2px;
  background: var(--accent);
}

.community-card figcaption p {
  font-size: 13.5px;
  color: var(--text-muted);
  line-height: 1.8;
  margin: 0;
}

.community-flow {
  max-width: 780px;
  margin: 0 auto;
}

.community-step {
  position: relative;
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 24px;
  padding-bottom: 40px;
}

.community-step:last-child {
  padding-bottom: 0;
}

.community-step::before {
  content: "";
  position: absolute;
  left: 27px;
  top: 56px;
  bottom: 4px;
  width: 2px;
  background: var(--border);
}

.community-step:last-child::before {
  display: none;
}

.community-dot {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color: #fff;
  font-size: 17px;
  font-weight: 700;
  box-shadow: 0 4px 12px rgba(0, 168, 168, 0.35);
}

.community-step-body {
  padding-top: 6px;
}

.community-step-body h4 {
  font-size: 17.5px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 8px;
}

.community-step-body p {
  font-size: 14.5px;
  color: var(--text-muted);
  line-height: 1.9;
  margin: 0;
}

/* ===== 详情页 - 核心功能媒体展示 ===== */
.esc-media {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 26px;
  max-width: 980px;
  margin: 44px auto 0;
}

.esc-figure {
  margin: 0;
  display: flex;
  flex-direction: column;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.esc-figure:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.esc-figure img {
  display: block;
  width: 100%;
  aspect-ratio: 2 / 1;
  object-fit: cover;
  object-position: top center;
}

.esc-figure figcaption {
  padding: 12px 16px;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--text);
  text-align: center;
  border-top: 1px solid var(--border);
  background: var(--surface);
}

/* ===== 详情页 - 适用对象 ===== */
.audience-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px 28px;
  max-width: 860px;
  margin: 0 auto;
}

.audience-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 22px;
  font-size: 15px;
  color: var(--text);
  line-height: 1.6;
}

.audience-list li::before {
  content: "✓";
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: rgba(0, 168, 168, 0.12);
  color: var(--accent);
  font-size: 13px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 2px;
}

/* ===== 详情页 - 相关推荐 ===== */
.detail-related {
  border-top: 1px solid var(--border);
}

/* ===== 详情页 - 未找到提示 ===== */
.detail-notfound {
  text-align: center;
  padding: 70px 20px;
}

.detail-notfound h2 {
  font-size: 24px;
  color: var(--primary);
  margin-bottom: 12px;
}

.detail-notfound p {
  font-size: 15px;
  color: var(--text-muted);
  margin-bottom: 26px;
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .services-grid,
  .advantages-grid,
  .stats-grid,
  .culture-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .principle-stats-4 {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .footer-top {
    grid-template-columns: 1fr 1fr;
  }

  .about-intro,
  .product-detail,
  .contact-wrapper {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  /* 单列模式：还原自动排布，文字在上、方块在下 */
  .product-detail .product-text,
  .product-detail .product-visual,
  .product-detail.reverse .product-text,
  .product-detail.reverse .product-visual {
    grid-column: 1;
    grid-row: auto;
  }

  .hero h1 {
    font-size: 42px;
  }

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

  .detail-hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .spec-row {
    grid-template-columns: 160px 1fr;
  }

  .services-grid .service-card {
    flex: 0 1 calc((100% - 28px) / 2);
  }
}

@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    padding: 24px;
    gap: 16px;
    box-shadow: var(--shadow);
    transform: translateY(-200%);
    transition: var(--transition);
  }

  .nav-links.open {
    transform: translateY(0);
  }

  .nav-toggle {
    display: flex;
  }

  /* 移动端下拉菜单：垂直展开 */
  .nav-item {
    width: 100%;
  }

  .nav-item > a {
    justify-content: space-between;
    width: 100%;
  }

  .dropdown-menu {
    position: static;
    transform: none;
    opacity: 1;
    visibility: visible;
    box-shadow: none;
    background: #f7fafc;
    border-radius: 8px;
    padding: 8px;
    margin-top: 8px;
    display: none;
    min-width: 0;
    width: 100%;
  }

  .nav-item.dropdown-open .dropdown-menu {
    display: block;
  }

  .dropdown-menu a {
    text-align: left;
    padding: 10px 14px;
  }

  .section {
    padding: 64px 0;
  }

  .section-title h2 {
    font-size: 28px;
  }

  .hero {
    min-height: auto;
    padding: 120px 0 64px;
  }

  .hero h1 {
    font-size: 32px;
  }

  .hero p {
    font-size: 16px;
  }

  .hero-stats {
    gap: 24px;
    flex-wrap: wrap;
  }

  .hero-stat .num {
    font-size: 32px;
  }

  .services-grid,
  .advantages-grid,
  .stats-grid,
  .culture-grid {
    grid-template-columns: 1fr;
  }

  .solution-grid {
    grid-template-columns: 1fr;
  }

  .services-grid .service-card {
    flex: 0 1 100%;
  }

  .detail-hero {
    padding: 48px 0 40px;
  }

  .detail-hero-text h2 {
    font-size: 23px;
  }

  .detail-hero-card {
    padding: 28px;
  }

  .detail-section {
    padding: 56px 0;
  }

  .detail-feature-grid,
  .detail-grid,
  .audience-list {
    grid-template-columns: 1fr;
  }

  .arch-grid-2,
  .arch-grid-3 {
    grid-template-columns: 1fr;
  }

  .principle-flow {
    grid-template-columns: 1fr;
    gap: 18px;
  }

  .principle-row {
    grid-template-columns: 1fr;
    gap: 22px;
  }

  .principle-row + .principle-row {
    margin-top: 36px;
  }

  .principle-row-text h3 {
    font-size: 19px;
  }

  .principle-stats {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .community-gallery {
    grid-template-columns: 1fr;
  }

  .community-step {
    grid-template-columns: 44px 1fr;
    gap: 16px;
    padding-bottom: 30px;
  }

  .community-dot {
    width: 44px;
    height: 44px;
    font-size: 15px;
  }

  .community-step::before {
    left: 21px;
    top: 44px;
  }

  .case-card {
    width: 240px;
    margin-right: 14px;
  }

  .case-card img {
    height: 150px;
  }

  .esc-media {
    grid-template-columns: 1fr;
  }

  .esc-figure img {
    aspect-ratio: 16 / 9;
  }

  .arch-group h3 {
    font-size: 18px;
  }

  .arch-figure img {
    height: auto;
    aspect-ratio: 16 / 9;
  }

  .arch-grid-3 .arch-figure img {
    aspect-ratio: 4 / 3;
  }

  .detail-metrics {
    gap: 20px 28px;
  }

  .dm-num {
    font-size: 20px;
  }

  .spec-row {
    grid-template-columns: 1fr;
    gap: 4px;
    padding: 14px 20px;
  }

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

  .detail-actions .btn {
    width: 100%;
  }

  .solution-flow {
    grid-template-columns: 1fr 1fr;
  }

  .footer-top {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }

  .timeline::before {
    left: 20px;
  }

  .timeline-item,
  .timeline-item:nth-child(odd) {
    flex-direction: row;
  }

  .timeline-item:nth-child(odd) .timeline-content {
    text-align: left;
    margin-right: 0;
  }

  .timeline-item:nth-child(even) .timeline-content {
    margin-left: 60px;
  }

  .timeline-content {
    width: calc(100% - 40px);
    margin-left: 60px !important;
  }

  .timeline-dot {
    left: 20px;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .page-banner h1 {
    font-size: 30px;
  }

  .contact-form {
    padding: 28px;
  }

  .cta-section h2 {
    font-size: 26px;
  }

  .product-tabs {
    margin-top: -28px;
    gap: 8px;
  }

  .product-tabs a {
    padding: 8px 16px;
    font-size: 13px;
  }

  .solution-flow {
    grid-template-columns: 1fr;
  }

  .solution-card {
    padding: 28px 24px;
  }

  .news-grid {
    grid-template-columns: 1fr;
  }

  .related-list {
    grid-template-columns: 1fr;
  }

  .news-filter {
    gap: 8px;
  }

  .filter-btn {
    padding: 7px 16px;
    font-size: 13px;
  }

  .news-article {
    padding: 28px 22px;
  }

  .article-head h1 {
    font-size: 22px;
  }

  .article-meta {
    gap: 12px;
    font-size: 12px;
  }

  .article-content {
    font-size: 15px;
  }

  .article-content .video-embed iframe {
    height: 220px;
  }
}