/* ========================================
   启诚AI - 企业AI产品官网
   主色调：稳重蓝（与官网一致）
   风格：成熟、商务、大气、可信赖
======================================== */

/* === 全局变量 === */
:root {
  /* 主色调 - 与 promisesap.com 官网一致的稳重蓝 */
  --primary: #1565C0;
  --primary-dark: #0D47A1;
  --primary-light: #1976D2;
  --primary-lighter: #42A5F5;
  --primary-pale: #E3F2FD;
  --primary-bg: #F0F7FF;

  /* 辅助色 - 克制点缀 */
  --accent: #00838F;
  --accent-light: #00ACC1;

  /* 背景色 - 白底为主，专业稳重 */
  --white: #FFFFFF;
  --bg-light: #F8FAFC;
  --bg-gray: #F1F5F9;
  --bg-card: #FFFFFF;
  --bg-dark: #0D2E5C;
  --bg-dark-2: #0A2240;

  /* 文字色 */
  --text-dark: #1A2B4A;
  --text-body: #475569;
  --text-gray: #64748B;
  --text-light: #94A3B8;
  --text-muted: #CBD5E1;
  --text-white: #FFFFFF;
  --text-white-soft: rgba(255, 255, 255, 0.88);
  --text-white-muted: rgba(255, 255, 255, 0.65);

  /* 边框 */
  --border: #E2E8F0;
  --border-light: #EEF2F7;
  --border-dark: rgba(255, 255, 255, 0.12);

  /* 渐变 - 商务克制 */
  --gradient-primary: linear-gradient(135deg, #0D47A1 0%, #1565C0 100%);
  --gradient-blue: linear-gradient(180deg, #F0F7FF 0%, #FFFFFF 100%);
  --gradient-hero: linear-gradient(120deg, #0A2240 0%, #0D2E5C 50%, #0D47A1 100%);
  --gradient-dark: linear-gradient(180deg, #0A2240 0%, #0D2E5C 100%);

  /* 阴影 - 柔和商务 */
  --shadow-xs: 0 1px 2px rgba(13, 46, 92, 0.04);
  --shadow-sm: 0 2px 8px rgba(13, 46, 92, 0.06);
  --shadow-md: 0 6px 24px rgba(13, 46, 92, 0.08);
  --shadow-lg: 0 16px 48px rgba(13, 46, 92, 0.12);
  --shadow-blue: 0 8px 24px rgba(21, 101, 192, 0.18);

  /* 间距 */
  --section-padding: 90px 0;
  --container-max: 1240px;

  /* 圆角 */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
}

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

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

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", -apple-system,
    BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text-body);
  background: var(--white);
  line-height: 1.75;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  text-decoration: none;
  color: inherit;
  transition: color 0.25s ease;
}

ul { list-style: none; }
img { max-width: 100%; display: block; }

/* === 通用容器 === */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 40px;
}

.section {
  padding: var(--section-padding);
  position: relative;
}

.section-light { background: var(--bg-light); }
.section-gray { background: var(--bg-gray); }
.section-blue { background: var(--primary-bg); }
.section-dark {
  background: var(--bg-dark);
  color: var(--text-white);
}

/* === 标题样式 === */
.section-header {
  text-align: center;
  margin-bottom: 56px;
}

.section-header .eyebrow {
  display: inline-block;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 2px;
  color: var(--primary);
  margin-bottom: 14px;
  padding: 5px 16px;
  background: var(--primary-pale);
  border-radius: 4px;
}

.section-dark .section-header .eyebrow {
  background: rgba(66, 165, 245, 0.15);
  color: var(--primary-lighter);
}

.section-header h2 {
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 14px;
  letter-spacing: -0.3px;
}

.section-dark .section-header h2 { color: var(--text-white); }

.section-header .desc {
  font-size: 1.05rem;
  color: var(--text-gray);
  max-width: 620px;
  margin: 0 auto;
}

.section-dark .section-header .desc { color: var(--text-white-muted); }

/* === 文字高亮 === */
.text-primary { color: var(--primary); }
.text-accent { color: var(--accent); }

/* ========================================
   导航栏 - 稳重商务
======================================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-light);
  transition: box-shadow 0.3s ease;
}

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

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 11px;
  color: var(--text-dark);
  font-weight: 700;
}

.nav-logo .logo-icon {
  width: 38px;
  height: 38px;
  background: var(--gradient-primary);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.15rem;
  color: var(--white);
  font-weight: 700;
}

.nav-logo .logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.nav-logo .logo-text .name {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-dark);
  letter-spacing: 0.5px;
}

.nav-logo .logo-text .sub {
  font-size: 0.62rem;
  color: var(--text-light);
  letter-spacing: 1.5px;
  font-weight: 500;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-menu > li > a {
  color: var(--text-body);
  font-size: 0.95rem;
  font-weight: 500;
  position: relative;
  padding: 22px 0;
  display: inline-block;
  transition: color 0.25s;
}

.nav-menu > li > a::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--primary);
  transition: all 0.3s ease;
  transform: translateX(-50%);
}

.nav-menu > li > a:hover,
.nav-menu > li > a.active {
  color: var(--primary);
}

.nav-menu > li > a:hover::after,
.nav-menu > li > a.active::after {
  width: 100%;
}

/* 导航下拉菜单 */
.nav-dropdown {
  position: relative;
}
.nav-dropdown-menu {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(8px);
  background: var(--white);
  min-width: 200px;
  border-radius: 0 0 8px 8px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.12);
  opacity: 0;
  visibility: hidden;
  transition: all 0.25s ease;
  z-index: 100;
  list-style: none;
  padding: 8px 0;
  margin: 0;
  border-top: 3px solid var(--primary);
}
.nav-dropdown:hover .nav-dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}
.nav-dropdown-menu li a {
  display: block;
  padding: 10px 24px;
  font-size: 0.78rem;
  color: var(--text-body);
  text-decoration: none;
  transition: all 0.2s;
  white-space: nowrap;
}
.nav-dropdown-menu li a:hover {
  background: var(--primary-pale);
  color: var(--primary);
  padding-left: 28px;
}

/* 系统登录下拉 */
.nav-login-group {
  display: flex;
  align-items: center;
  gap: 10px;
  padding-left: 18px;
  margin-left: 4px;
  border-left: 1px solid var(--border);
}

.nav-login-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 7px 13px;
  font-size: 0.82rem;
  font-weight: 500;
  border-radius: 4px;
  color: var(--text-body);
  background: transparent;
  transition: all 0.25s;
  border: 1px solid var(--border);
  white-space: nowrap;
}

.nav-login-btn:hover {
  background: var(--primary-pale);
  color: var(--primary);
  border-color: var(--primary-lighter);
}

.nav-login-btn .icon {
  font-size: 0.85rem;
  filter: grayscale(0.2);
}

.nav-cta {
  padding: 8px 20px;
  background: var(--primary);
  color: var(--white) !important;
  border-radius: 4px;
  font-weight: 600;
  font-size: 0.9rem;
  transition: all 0.25s;
  white-space: nowrap;
}

.nav-cta:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
}

.nav-cta::after { display: none; }

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

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--text-dark);
  border-radius: 2px;
  transition: all 0.3s;
}

/* ========================================
   Hero - 商务大气
======================================== */
.hero {
  position: relative;
  padding: 130px 0 80px;
  background: var(--gradient-hero);
  overflow: hidden;
}

/* Hero 背景配图遮罩层（预留真实配图位置） */
.hero-bg-image {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  opacity: 0.25;
  /* 预留：此处应放置企业大楼/科技场景配图 */
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(10, 34, 64, 0.92) 0%, rgba(13, 46, 92, 0.85) 50%, rgba(13, 71, 161, 0.75) 100%);
}

.hero .container {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero-content { max-width: 580px; }

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 16px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 4px;
  color: var(--white);
  font-size: 0.82rem;
  font-weight: 500;
  margin-bottom: 24px;
}

.hero-badge .dot {
  width: 7px;
  height: 7px;
  background: #4ADE80;
  border-radius: 50%;
}

.hero-content h1 {
  font-size: 2.9rem;
  font-weight: 700;
  color: var(--white);
  line-height: 1.3;
  margin-bottom: 20px;
  letter-spacing: -0.5px;
}

.hero-content h1 .highlight {
  color: #64B5F6;
}

.hero-content .subtitle {
  font-size: 1.08rem;
  color: var(--text-white-muted);
  margin-bottom: 36px;
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  gap: 16px;
  margin-bottom: 48px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 30px;
  border-radius: 6px;
  font-size: 0.98rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.25s ease;
  border: none;
  font-family: inherit;
}

.btn-primary {
  background: var(--primary);
  color: var(--white);
  box-shadow: var(--shadow-blue);
}

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 12px 28px rgba(21, 101, 192, 0.3);
}

.btn-outline {
  background: transparent;
  color: var(--white);
  border: 1.5px solid rgba(255, 255, 255, 0.35);
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.6);
}

.btn-dark {
  background: var(--bg-dark);
  color: var(--white);
}

.btn-dark:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
}

.btn-light {
  background: var(--white);
  color: var(--primary);
  border: 1px solid var(--border);
}

.btn-light:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-sm);
}

.btn-lg {
  padding: 14px 34px;
  font-size: 1.02rem;
}

/* Hero 统计数据 */
.hero-stats {
  display: flex;
  gap: 40px;
  padding-top: 36px;
  border-top: 1px solid rgba(255, 255, 255, 0.15);
}

.hero-stat .num {
  font-size: 1.9rem;
  font-weight: 700;
  color: var(--white);
  line-height: 1;
}

.hero-stat .num .unit {
  font-size: 1rem;
  font-weight: 600;
  margin-left: 2px;
}

.hero-stat .label {
  font-size: 0.82rem;
  color: var(--text-white-muted);
  margin-top: 7px;
}

/* Hero 右侧 - 产品截图/配图区域 */
.hero-visual {
  position: relative;
}

.hero-product-shot {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-lg);
  padding: 20px;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.3);
}

/* 预留：产品界面截图占位 */
.hero-shot-placeholder {
  background: linear-gradient(135deg, rgba(66, 165, 245, 0.15), rgba(13, 71, 161, 0.25));
  border-radius: var(--radius-md);
  height: 320px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: rgba(255, 255, 255, 0.5);
  font-size: 0.85rem;
  text-align: center;
  gap: 8px;
  border: 1px dashed rgba(255, 255, 255, 0.15);
}

.hero-shot-placeholder .ph-icon {
  font-size: 2.5rem;
  opacity: 0.4;
}

.hero-shot-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 4px 4px;
}

.hero-shot-meta .title {
  color: var(--white);
  font-size: 0.9rem;
  font-weight: 600;
}

.hero-shot-meta .shot-caption {
  font-size: 0.78rem;
  color: #64B5F6;
  background: rgba(100, 181, 246, 0.15);
  padding: 3px 10px;
  border-radius: 4px;
  font-weight: 500;
}

/* Hero区产品截图轮播 */
.hero-carousel {
  position: relative;
}
.carousel-track {
  position: relative;
  width: 100%;
  height: 320px;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: #f5f7fa;
}
.carousel-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 0.6s ease;
  display: flex;
  align-items: center;
  justify-content: center;
}
.carousel-slide.active {
  opacity: 1;
}
.carousel-slide img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}
.carousel-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.85);
  border: none;
  font-size: 1.6rem;
  line-height: 1;
  color: #1565C0;
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(0,0,0,0.15);
  transition: all 0.2s;
  z-index: 2;
  font-weight: 700;
}
.carousel-btn:hover {
  background: #1565C0;
  color: #fff;
}
.carousel-prev { left: 10px; }
.carousel-next { right: 10px; }
.carousel-dots {
  position: absolute;
  bottom: 12px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 8px;
  z-index: 2;
}
.carousel-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.5);
  cursor: pointer;
  transition: all 0.2s;
}
.carousel-dot.active {
  background: #1565C0;
  width: 22px;
  border-radius: 4px;
}

/* ========================================
   系统登录入口栏（Hero 下方）
======================================== */
.system-access {
  background: var(--white);
  padding: 40px 0;
  margin-top: 0;
  position: relative;
  z-index: 1;
}

.system-access .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 36px;
  padding-top: 0;
}

.system-card {
  display: flex;
  align-items: center;
  gap: 20px;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 24px 28px;
  box-shadow: var(--shadow-md);
  transition: all 0.3s ease;
  cursor: pointer;
}

.system-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
}

.system-card .sys-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  background: var(--primary-pale);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  flex-shrink: 0;
}

.system-card:nth-child(2) .sys-icon {
  background: #E0F2F1;
}

.system-card .sys-info {
  flex: 1;
}

.system-card .sys-info h3 {
  font-size: 1.08rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 4px;
}

.system-card .sys-info p {
  font-size: 0.85rem;
  color: var(--text-gray);
}

.system-card .sys-arrow {
  color: var(--primary);
  font-size: 1.3rem;
  transition: transform 0.25s;
}

.system-card:hover .sys-arrow {
  transform: translateX(4px);
}

/* 带背景图的系统登录卡片 */
.system-card .sys-bg-img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
  opacity: 0.18;
  transition: opacity 0.3s ease;
}

.system-card {
  position: relative;
  overflow: hidden;
}

.system-card .sys-icon,
.system-card .sys-info,
.system-card .sys-arrow {
  position: relative;
  z-index: 1;
}

.system-card:hover .sys-bg-img {
  opacity: 0.28;
}

/* 带背景图的行业卡片 */
.industry-card {
  background: var(--primary);
}

.industry-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: var(--card-bg);
  background-size: cover;
  background-position: center;
  opacity: 0.35;
  z-index: 0;
}

.industry-card::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(10,34,64,0.35) 0%, rgba(10,34,64,0.75) 100%);
  z-index: 1;
}

/* ========================================
   信任栏 - 客户Logo墙
======================================== */
.trust-bar {
  padding: 56px 0;
  background: var(--white);
}

.trust-bar .trust-label {
  text-align: center;
  font-size: 0.88rem;
  color: var(--text-light);
  font-weight: 500;
  margin-bottom: 32px;
  letter-spacing: 1px;
}

.trust-logos {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 60px;
  flex-wrap: wrap;
}

.trust-logo {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-light);
  opacity: 0.65;
  transition: all 0.3s;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 4px;
}

.trust-logo:hover {
  opacity: 1;
  color: var(--primary);
}

/* ========================================
   关于/简介区
======================================== */
.about-intro {
  padding: 80px 0;
  background: var(--bg-light);
}

.about-intro .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.about-text .eyebrow {
  display: inline-block;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 2px;
  color: var(--primary);
  margin-bottom: 14px;
  padding: 5px 16px;
  background: var(--primary-pale);
  border-radius: 4px;
}

.about-text h2 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 20px;
  line-height: 1.4;
}

.about-text p {
  font-size: 1rem;
  color: var(--text-body);
  line-height: 1.9;
  margin-bottom: 16px;
}

.about-text .about-points {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 28px;
}

.about-point {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.92rem;
  color: var(--text-dark);
  font-weight: 500;
}

.about-point .check {
  width: 20px;
  height: 20px;
  background: var(--primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  font-size: 0.7rem;
  flex-shrink: 0;
  margin-top: 2px;
}

/* 关于区配图占位 */
.about-visual {
  position: relative;
}

.about-image-placeholder {
  background: var(--gradient-blue);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  height: 380px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--text-light);
  font-size: 0.85rem;
  text-align: center;
  gap: 10px;
  position: relative;
  overflow: hidden;
}

.about-image-placeholder .ph-icon {
  font-size: 3rem;
  opacity: 0.4;
}

.about-image-placeholder .ph-label {
  background: var(--white);
  padding: 6px 14px;
  border-radius: 4px;
  font-size: 0.8rem;
  color: var(--text-gray);
  border: 1px solid var(--border);
}

/* ========================================
   核心能力区
======================================== */
.cap-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.cap-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  transition: all 0.3s ease;
  position: relative;
}

.cap-card:hover {
  border-color: var(--primary-lighter);
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.cap-card .cap-num {
  position: absolute;
  top: 24px;
  right: 28px;
  font-size: 2.4rem;
  font-weight: 800;
  color: var(--primary-pale);
  line-height: 1;
}

.cap-icon {
  width: 54px;
  height: 54px;
  background: var(--primary-pale);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 22px;
}

.cap-card h3 {
  font-size: 1.18rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 12px;
}

.cap-card p {
  font-size: 0.9rem;
  color: var(--text-gray);
  line-height: 1.75;
}

/* ========================================
   产品区
======================================== */
.products-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.product-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
  cursor: pointer;
}

a.product-card:hover {
  border-color: var(--primary-lighter);
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
  text-decoration: none;
}

/* 产品配图占位 */
.product-banner {
  height: 180px;
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.product-banner-img {
  background: #f5f7fa;
  padding: 0;
}
.product-banner-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.product-banner .ph-label {
  position: absolute;
  bottom: 12px;
  left: 12px;
  background: rgba(255, 255, 255, 0.9);
  padding: 4px 12px;
  border-radius: 4px;
  font-size: 0.72rem;
  color: var(--text-gray);
}

.product-banner .product-icon {
  font-size: 3rem;
  opacity: 0.85;
}

.product-card:nth-child(2) .product-banner {
  background: linear-gradient(135deg, #00695C, #00838F);
}
.product-card:nth-child(3) .product-banner {
  background: linear-gradient(135deg, #283593, #1565C0);
}
.product-card:nth-child(4) .product-banner {
  background: linear-gradient(135deg, #01579B, #0277BD);
}
.product-card:nth-child(5) .product-banner {
  background: linear-gradient(135deg, #1A237E, #303F9F);
}
.product-card:nth-child(6) .product-banner {
  background: linear-gradient(135deg, #004D40, #00695C);
}

.product-body {
  padding: 28px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.product-tag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--primary);
  background: var(--primary-pale);
  padding: 4px 12px;
  border-radius: 4px;
  margin-bottom: 12px;
  align-self: flex-start;
  letter-spacing: 0.5px;
}

.product-card h3 {
  font-size: 1.22rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 12px;
}

.product-card .product-desc {
  font-size: 0.9rem;
  color: var(--text-gray);
  line-height: 1.75;
  margin-bottom: 20px;
  flex: 1;
}

.product-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--primary);
  transition: gap 0.25s;
}

.product-link:hover {
  gap: 10px;
}

/* ========================================
   启诚AI+ 流程区
======================================== */
.ai-process {
  background: var(--bg-dark);
  color: var(--white);
  position: relative;
}

.process-header {
  text-align: center;
  margin-bottom: 60px;
}

.process-header h2 {
  font-size: 2.2rem;
  font-weight: 700;
  margin-bottom: 14px;
}

.process-header h2 .highlight {
  color: #64B5F6;
}

.process-header .tagline {
  font-size: 1.05rem;
  color: var(--text-white-muted);
  max-width: 560px;
  margin: 0 auto 36px;
}

.process-stats {
  display: flex;
  justify-content: center;
  gap: 56px;
}

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

.process-stat .num {
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--white);
}

.process-stat .label {
  font-size: 0.88rem;
  color: var(--text-white-muted);
  margin-top: 6px;
}

.process-timeline {
  display: flex;
  justify-content: space-between;
  position: relative;
  gap: 20px;
}

.process-timeline::before {
  content: "";
  position: absolute;
  top: 44px;
  left: 12%;
  right: 12%;
  height: 2px;
  background: linear-gradient(90deg, transparent, rgba(100, 181, 246, 0.3), transparent);
}

.process-step {
  flex: 1;
  text-align: center;
  position: relative;
}

.process-step .step-circle {
  width: 88px;
  height: 88px;
  border-radius: 50%;
  background: rgba(100, 181, 246, 0.08);
  border: 2px solid rgba(100, 181, 246, 0.3);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  margin: 0 auto 22px;
  transition: all 0.3s;
  position: relative;
  z-index: 2;
}

.process-step:hover .step-circle {
  background: rgba(100, 181, 246, 0.15);
  border-color: #64B5F6;
}

.process-step .step-num {
  font-size: 1.5rem;
  font-weight: 700;
  color: #64B5F6;
  line-height: 1;
}

.process-step .step-month {
  font-size: 0.62rem;
  color: var(--text-white-muted);
  margin-top: 2px;
}

.process-step h4 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 10px;
}

.process-step .step-items {
  font-size: 0.84rem;
  color: var(--text-white-muted);
  line-height: 1.85;
}

/* ========================================
   行业方案区
======================================== */
.industry-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.industry-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  min-height: 240px;
  display: flex;
  align-items: flex-end;
  padding: 28px;
  color: var(--white);
  cursor: pointer;
  transition: all 0.3s ease;
  border: 1px solid var(--border);
}

.industry-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--gradient-primary);
  z-index: 0;
}

.industry-card::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(0,0,0,0.1) 0%, rgba(0,0,0,0.5) 100%);
  z-index: 1;
}

.industry-card:nth-child(2)::before { background: linear-gradient(135deg, #004D40, #00695C); }
.industry-card:nth-child(3)::before { background: linear-gradient(135deg, #1A237E, #283593); }
.industry-card:nth-child(4)::before { background: linear-gradient(135deg, #01579B, #0277BD); }
.industry-card:nth-child(5)::before { background: linear-gradient(135deg, #311B92, #4527A0); }
.industry-card:nth-child(6)::before { background: linear-gradient(135deg, #0D47A1, #1565C0); }

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

.industry-card .industry-content {
  position: relative;
  z-index: 2;
}

.industry-card .industry-icon {
  font-size: 2rem;
  margin-bottom: 12px;
  display: block;
}

.industry-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.industry-card p {
  font-size: 0.86rem;
  color: rgba(255, 255, 255, 0.85);
  line-height: 1.65;
}

/* ========================================
   案例区
======================================== */
.cases-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.case-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all 0.3s ease;
}

.case-card:hover {
  border-color: var(--primary-lighter);
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}

.case-header {
  padding: 30px 30px 0;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
}

.case-company {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--primary);
  letter-spacing: 0.5px;
  margin-bottom: 8px;
}

.case-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 14px;
}

.case-tag {
  display: inline-block;
  font-size: 0.74rem;
  font-weight: 600;
  padding: 5px 12px;
  border-radius: 4px;
  background: var(--primary-pale);
  color: var(--primary);
  white-space: nowrap;
}

.case-body { padding: 0 30px 30px; }

.case-desc {
  font-size: 0.9rem;
  color: var(--text-gray);
  line-height: 1.85;
  margin-bottom: 22px;
}

.case-metrics {
  display: flex;
  gap: 28px;
  padding-top: 22px;
  border-top: 1px solid var(--border-light);
}

.case-metric .num {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--primary);
}

.case-metric .label {
  font-size: 0.78rem;
  color: var(--text-light);
  margin-top: 4px;
}

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

.news-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all 0.3s ease;
}

.news-card:hover {
  border-color: var(--primary-lighter);
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}

.news-banner {
  height: 160px;
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  position: relative;
}

.news-card:nth-child(2) .news-banner { background: linear-gradient(135deg, #00695C, #00838F); }
.news-card:nth-child(3) .news-banner { background: linear-gradient(135deg, #283593, #1565C0); }

.news-body { padding: 26px; }

.news-date {
  font-size: 0.78rem;
  color: var(--text-light);
  margin-bottom: 12px;
}

.news-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 12px;
  line-height: 1.55;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  transition: color 0.25s;
}

.news-card:hover h3 { color: var(--primary); }

.news-excerpt {
  font-size: 0.86rem;
  color: var(--text-gray);
  line-height: 1.75;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ========================================
   CTA 区
======================================== */
.cta-section {
  padding: 90px 0;
  background: var(--gradient-hero);
  position: relative;
  overflow: hidden;
}

.cta-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 660px;
  margin: 0 auto;
}

.cta-content h2 {
  font-size: 2.4rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 18px;
  letter-spacing: -0.5px;
}

.cta-content h2 .highlight { color: #64B5F6; }

.cta-content p {
  font-size: 1.08rem;
  color: var(--text-white-muted);
  margin-bottom: 36px;
}

.cta-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
}

/* ========================================
   页脚
======================================== */
.footer {
  background: var(--bg-dark-2);
  color: var(--text-white-muted);
  padding: 64px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.4fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer-brand .nav-logo {
  margin-bottom: 20px;
}

.footer-brand .nav-logo .logo-text .name { color: var(--white); }
.footer-brand .nav-logo .logo-text .sub { color: var(--text-white-muted); }

.footer-brand p {
  font-size: 0.88rem;
  line-height: 1.85;
  margin-bottom: 24px;
}

.footer-social {
  display: flex;
  gap: 10px;
}

.footer-social a {
  width: 38px;
  height: 38px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.06);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  transition: all 0.25s;
}

.footer-social a:hover {
  background: var(--primary);
  color: var(--white);
}

.footer-col h4 {
  font-size: 0.98rem;
  font-weight: 600;
  color: var(--white);
  margin-bottom: 20px;
}

.footer-col ul li {
  margin-bottom: 12px;
}

.footer-col ul li a {
  font-size: 0.86rem;
  color: var(--text-white-muted);
  transition: color 0.25s;
}

.footer-col ul li a:hover {
  color: var(--white);
}

/* 页脚当前页高亮（active状态） */
.footer-col ul li.active a {
  color: var(--primary);
  font-weight: 600;
}

.footer-contact li {
  font-size: 0.86rem;
  margin-bottom: 14px;
  line-height: 1.6;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 22px 0;
  text-align: center;
  font-size: 0.8rem;
}

.footer-bottom a {
  color: var(--text-white-muted);
  transition: color 0.25s;
}

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

/* ========================================
   内页通用
======================================== */
.page-hero {
  padding: 130px 0 70px;
  background: var(--gradient-hero);
  color: var(--white);
  position: relative;
}

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

.page-hero h1 {
  font-size: 2.4rem;
  font-weight: 700;
  margin-bottom: 14px;
}

.page-hero .breadcrumb {
  font-size: 0.88rem;
  color: var(--text-white-muted);
}

.page-hero .breadcrumb a { color: #64B5F6; }

/* 内容卡片 */
.content-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.content-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 34px;
  transition: all 0.3s ease;
}

.content-card:hover {
  border-color: var(--primary-lighter);
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}

.content-card .card-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  background: var(--primary-pale);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 22px;
}

.content-card h3 {
  font-size: 1.18rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 12px;
}

.content-card p {
  font-size: 0.9rem;
  color: var(--text-gray);
  line-height: 1.75;
}

/* ========================================
   资质证书墙
======================================== */
.certs-section {
  padding: 80px 0;
  background: var(--bg-light);
}

.certs-grid {
  margin-top: 48px;
}

/* 证书分组行 */
.certs-row {
  display: flex;
  justify-content: center;
  gap: 28px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}
.certs-row:last-child {
  margin-bottom: 0;
}
/* ISO认证行：3个纵向证书 */
.certs-row-iso {
  gap: 24px;
}
.certs-row-iso .cert-card {
  width: 220px;
}
/* 企业资质行：3个横向证书 */
.certs-row-ent .cert-card {
  width: 240px;
}
/* 其他资质行：2个 */
.certs-row-other .cert-card {
  width: 280px;
}

.cert-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all 0.3s ease;
  cursor: pointer;
  display: flex;
  flex-direction: column;
}

.cert-card:hover {
  border-color: var(--primary-lighter);
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.cert-card .cert-img {
  width: 100%;
  display: block;
  background: #f5f7fa;
  object-fit: contain;
}
/* 纵向证书（CMMI/ISO/高新）*/
.cert-card .cert-img-portrait {
  height: 300px;
  padding: 12px;
}
/* 横向证书（专精特新/科技型/AI协会/人力许可）*/
.cert-card .cert-img-landscape {
  height: 180px;
  padding: 12px;
}

.cert-card .cert-name {
  padding: 14px 16px;
  text-align: center;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-dark);
  border-top: 1px solid var(--border-light);
  margin-top: auto;
}

/* 知识库产品截图展示 */
.knowledge-showcase {
  padding: 80px 0;
  background: var(--white);
}

.kb-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
}

.kb-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all 0.3s ease;
  cursor: pointer;
}

.kb-card:hover {
  border-color: var(--primary-lighter);
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}

.kb-card-link {
  display: block;
  height: 100%;
}

.kb-card .kb-img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  object-position: top;
  display: block;
  background: var(--bg-gray);
  border-bottom: 1px solid var(--border-light);
}

.kb-card .kb-body {
  padding: 18px 22px;
}

.kb-card .kb-body h4 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-dark);
  margin-bottom: 6px;
  line-height: 1.5;
}

.kb-card .kb-body p {
  font-size: 0.82rem;
  color: var(--text-gray);
}

/* 知识库分页 */
.kb-wrapper {
  margin-top: 48px;
}
.kb-page {
  display: none;
}
.kb-page-active {
  display: block;
}
.kb-pagination {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-top: 40px;
}
.kb-page-btn {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 2px solid var(--border);
  background: var(--white);
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-body);
  cursor: pointer;
  transition: all 0.25s ease;
}
.kb-page-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
}
.kb-page-btn.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

/* 团队照片展示 */
.team-gallery {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 40px;
}

.team-photo {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  height: 260px;
  box-shadow: var(--shadow-sm);
  transition: all 0.3s ease;
}

.team-photo:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}

.team-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* ========================================
   行业洞察（新闻页双列布局）
======================================== */
.insights-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 48px;
  align-items: flex-start;
}

.insights-main {
  min-width: 0;
}

/* 头条文章 */
.insight-headline {
  display: block;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px;
  text-decoration: none;
  color: inherit;
  transition: all 0.3s ease;
  margin-bottom: 28px;
  box-shadow: var(--shadow-sm);
}
.insight-headline:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
  text-decoration: none;
}
.insight-headline-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
  flex-wrap: wrap;
}
.insight-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--primary);
  background: var(--primary-pale);
  padding: 4px 12px;
  border-radius: 4px;
}
.insight-date {
  font-size: 0.82rem;
  color: var(--text-light);
}
.insight-headline h3 {
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--text-dark);
  line-height: 1.45;
  margin-bottom: 14px;
}
.insight-headline p {
  color: var(--text-body);
  font-size: 0.95rem;
  line-height: 1.85;
  margin-bottom: 16px;
}
.insight-readmore {
  display: inline-block;
  color: var(--primary);
  font-weight: 600;
  font-size: 0.9rem;
}

/* 列表文章 */
.insight-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.insight-item {
  display: flex;
  gap: 20px;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 24px;
  text-decoration: none;
  color: inherit;
  transition: all 0.3s ease;
}
.insight-item:hover {
  border-color: var(--primary-lighter);
  box-shadow: var(--shadow-sm);
  text-decoration: none;
  transform: translateX(4px);
}
.insight-item-num {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--primary);
  font-family: 'Segoe UI', system-ui, sans-serif;
  line-height: 1;
  min-width: 36px;
  opacity: 0.6;
}
.insight-item-body {
  flex: 1;
  min-width: 0;
}
.insight-item-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
  flex-wrap: wrap;
}
.insight-item-body h4 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-dark);
  line-height: 1.5;
  margin-bottom: 8px;
}
.insight-item-body p {
  font-size: 0.88rem;
  color: var(--text-gray);
  line-height: 1.7;
}

/* 公众号二维码侧栏 */
.insights-aside {
  position: sticky;
  top: 100px;
}
.qr-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  text-align: center;
  box-shadow: var(--shadow-sm);
}
.qr-card .qr-img {
  width: 200px;
  height: 200px;
  border-radius: 8px;
  display: block;
  margin: 0 auto 18px;
  border: 1px solid var(--border-light);
}
.qr-card h4 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 10px;
}
.qr-card p {
  font-size: 0.85rem;
  color: var(--text-gray);
  line-height: 1.65;
  margin-bottom: 16px;
}
.qr-card .qr-link {
  display: inline-block;
  color: var(--primary);
  font-weight: 600;
  font-size: 0.88rem;
  text-decoration: none;
}
.qr-card .qr-link:hover {
  text-decoration: underline;
}

/* 行业洞察分类标签 */
.insight-tabs {
  display: flex;
  gap: 12px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}
.insight-tab {
  padding: 8px 20px;
  border-radius: 20px;
  border: 1px solid var(--border);
  background: var(--white);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-body);
  cursor: pointer;
  transition: all 0.25s ease;
}
.insight-tab:hover {
  border-color: var(--primary);
  color: var(--primary);
}
.insight-tab.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

/* 分类组标题 */
.insight-cat-group {
  margin-bottom: 40px;
}
.insight-cat-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 20px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--primary-pale);
}

@media (max-width: 1024px) {
  .insights-layout {
    grid-template-columns: 1fr;
    gap: 36px;
  }
  .insights-aside {
    position: static;
  }
  .insights-aside .qr-card {
    max-width: 400px;
    margin: 0 auto;
  }
}
@media (max-width: 768px) {
  .insight-headline { padding: 24px; }
  .insight-headline h3 { font-size: 1.2rem; }
  .insight-item { padding: 18px; }
  .insight-item-num { font-size: 1.2rem; min-width: 28px; }
}

.team-photo .team-caption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 16px 20px;
  background: linear-gradient(transparent, rgba(10, 34, 64, 0.85));
  color: var(--white);
  font-size: 0.85rem;
  font-weight: 600;
}

/* 内页带图Banner */
.page-hero-banner {
  padding: 130px 0 70px;
  color: var(--white);
  position: relative;
  overflow: hidden;
}

.page-hero-banner .ph-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  z-index: 0;
}

.page-hero-banner .ph-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(10, 34, 64, 0.88) 0%, rgba(13, 46, 92, 0.78) 100%);
  z-index: 1;
}

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

.page-hero-banner h1 {
  font-size: 2.4rem;
  font-weight: 700;
  margin-bottom: 14px;
}

.page-hero-banner .breadcrumb {
  font-size: 0.88rem;
  color: var(--text-white-muted);
}

.page-hero-banner .breadcrumb a { color: #64B5F6; }

/* ========================================
   发展历程时间轴
======================================== */
.dev-timeline {
  max-width: 820px;
  margin: 0 auto;
  position: relative;
  padding: 20px 0;
}

.dev-timeline-item {
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: 36px;
  align-items: flex-start;
  position: relative;
  padding-bottom: 44px;
}
.dev-timeline-item:last-child {
  padding-bottom: 0;
}

/* 年份列 — 统一左对齐 */
.dev-tl-year {
  text-align: left;
  position: relative;
  padding-top: 2px;
}
.dev-tl-year .year-num {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.1;
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  display: inline-block;
}
.dev-tl-year .year-num .year-plus {
  font-size: 0.7em;
  vertical-align: super;
  margin-left: 1px;
}
.dev-tl-year .year-label {
  display: block;
  font-size: 0.78rem;
  color: var(--text-light);
  margin-top: 6px;
  letter-spacing: 1px;
}

/* 内容列 */
.dev-tl-content {
  position: relative;
  padding-left: 32px;
  border-left: 3px solid var(--primary-pale);
  padding-top: 2px;
  padding-bottom: 8px;
}
.dev-tl-content::before {
  content: '';
  position: absolute;
  left: -9px;
  top: 4px;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background: var(--white);
  border: 3px solid var(--primary);
  box-shadow: 0 0 0 4px rgba(21, 101, 192, 0.08);
}
.dev-timeline-item:last-child .dev-tl-content::before {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px rgba(0, 131, 143, 0.12);
}
.dev-timeline-item:last-child .dev-tl-content {
  border-left-color: rgba(0, 131, 143, 0.25);
}
.dev-tl-content h4 {
  font-size: 1.12rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 8px;
  line-height: 1.4;
}
.dev-tl-content p {
  color: var(--text-gray);
  font-size: 0.92rem;
  line-height: 1.75;
}

/* === 滚动渐入（克制） === */
.fade-up {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

/* ========================================
   知识产权 / 软件著作权
======================================== */
.ip-section {
  padding: 80px 0;
  background: var(--white);
}

/* ========================================
   产品详情页
======================================== */
.pd-overview {
  padding: 60px 0;
  background: var(--white);
}
.pd-overview .container {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 56px;
  align-items: center;
}
.pd-image-box {
  border-radius: 16px;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  background: var(--bg-light);
}
.pd-image-box img {
  width: 100%;
  height: 420px;
  object-fit: cover;
  display: block;
}
.pd-info .pd-tag {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 1px;
  color: var(--primary);
  background: var(--primary-pale);
  padding: 5px 16px;
  border-radius: 4px;
  margin-bottom: 16px;
}
.pd-info h1 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 18px;
  line-height: 1.4;
}
.pd-info .pd-lead {
  font-size: 1rem;
  color: var(--text-body);
  line-height: 1.9;
  margin-bottom: 28px;
}
.pd-info .pd-highlights {
  display: flex;
  gap: 32px;
  flex-wrap: wrap;
  margin-bottom: 32px;
}
.pd-info .pd-highlights .hl-item .hl-num {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--primary);
}
.pd-info .pd-highlights .hl-item .hl-label {
  font-size: 0.85rem;
  color: var(--text-light);
}
.pd-info .pd-cta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.pd-features {
  padding: 80px 0;
  background: var(--bg-light);
}
.pd-feature-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-top: 48px;
}
.pd-feature-card {
  background: var(--white);
  border-radius: var(--radius-md);
  padding: 32px;
  border: 1px solid var(--border);
  transition: all 0.3s ease;
}
.pd-feature-card:hover {
  border-color: var(--primary-lighter);
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}
.pd-feature-card .feat-icon {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  background: var(--primary-pale);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 18px;
}
.pd-feature-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 10px;
}
.pd-feature-card p {
  font-size: 0.92rem;
  color: var(--text-body);
  line-height: 1.75;
}

.pd-scenarios {
  padding: 80px 0;
  background: var(--white);
}
.pd-scenario-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
}
.pd-scenario-item {
  text-align: center;
  padding: 36px 24px;
  border-radius: var(--radius-md);
  background: var(--bg-light);
  transition: all 0.3s ease;
}
.pd-scenario-item:hover {
  background: var(--primary-pale);
  transform: translateY(-4px);
}
.pd-scenario-item .scn-icon {
  font-size: 2.2rem;
  margin-bottom: 14px;
}
.pd-scenario-item h4 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 8px;
}
.pd-scenario-item p {
  font-size: 0.88rem;
  color: var(--text-body);
  line-height: 1.7;
}

/* 产品详情页响应式 */
@media (max-width: 1024px) {
  .pd-overview .container {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .pd-feature-grid,
  .pd-scenario-list {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 768px) {
  .pd-feature-grid,
  .pd-scenario-list {
    grid-template-columns: 1fr;
  }
  .pd-info h1 { font-size: 1.6rem; }
  .pd-image-box img { height: 280px; }
}

/* 知识产权 — 图片卡片+分页 */
.ip-wrapper {
  margin-top: 48px;
}
.ip-page {
  display: none;
}
.ip-page-active {
  display: block;
}
.ip-grid-img {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.ip-img-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
  cursor: pointer;
}
.ip-img-card:hover {
  border-color: var(--primary-lighter);
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}
.ip-img-card .ip-img {
  width: 100%;
  height: 320px;
  object-fit: contain;
  display: block;
  background: #f5f7fa;
  padding: 12px;
}
.ip-img-card .ip-img-name {
  padding: 14px 16px;
  text-align: center;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-dark);
  border-top: 1px solid var(--border-light);
  line-height: 1.5;
  margin-top: auto;
}
.ip-img-card .ip-img-name .ip-ver {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--primary);
  background: var(--primary-pale);
  padding: 2px 8px;
  border-radius: 4px;
  margin-left: 4px;
}
.ip-pagination {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-top: 40px;
}
.ip-page-btn {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 2px solid var(--border);
  background: var(--white);
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-body);
  cursor: pointer;
  transition: all 0.25s ease;
}
.ip-page-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
}
.ip-page-btn.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

/* ========================================
   手语视界专属页面样式
======================================== */
.sl-intro-layout {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 56px;
  align-items: center;
}
.sl-stats {
  display: flex;
  gap: 36px;
  flex-wrap: wrap;
}
.sl-stat-num {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.1;
}
.sl-stat-label {
  font-size: 0.85rem;
  color: var(--text-light);
  margin-top: 4px;
}

.sl-series-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
}
.sl-series-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  text-align: center;
  transition: all 0.3s ease;
}
.sl-series-card:hover {
  border-color: var(--primary-lighter);
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}
.sl-series-icon {
  font-size: 2.5rem;
  margin-bottom: 16px;
}
.sl-series-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 10px;
}
.sl-series-card p {
  font-size: 0.9rem;
  color: var(--text-body);
  line-height: 1.7;
}

/* 账号矩阵二维码卡片 — 3+2居中布局 */
.sl-qr-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 24px;
  margin-top: 48px;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}
.sl-qr-grid .sl-qr-card {
  flex: 0 1 calc((100% - 48px) / 3);
  min-width: 220px;
}
.sl-qr-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 28px 20px;
  text-align: center;
  transition: all 0.3s ease;
}
.sl-qr-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}
.sl-qr-img {
  width: 130px;
  height: 130px;
  border-radius: 8px;
  display: block;
  margin: 0 auto 16px;
  border: 1px solid var(--border-light);
  object-fit: contain;
  background: #f5f7fa;
}
.sl-qr-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 6px;
}
.sl-qr-name {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 8px;
}
.sl-qr-desc {
  font-size: 0.8rem;
  color: var(--text-gray);
  line-height: 1.6;
  margin-bottom: 12px;
}
.sl-qr-link {
  display: inline-block;
  color: var(--primary);
  font-weight: 600;
  font-size: 0.82rem;
  text-decoration: none;
}

@media (max-width: 1024px) {
  .sl-qr-grid .sl-qr-card { flex: 0 1 calc((100% - 24px) / 2); }
}
@media (max-width: 768px) {
  .sl-qr-grid .sl-qr-card { flex: 0 1 100%; max-width: 300px; }
  .sl-qr-img { width: 110px; height: 110px; }
}
/* 手语在线平台卡片 */
.sl-platform-card {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 48px;
  align-items: center;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 48px;
  box-shadow: var(--shadow-sm);
  transition: all 0.3s ease;
}
.sl-platform-card:hover {
  box-shadow: var(--shadow-md);
}
.sl-platform-content h2 {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--text-dark);
  margin: 12px 0 16px;
}
.sl-platform-content p {
  font-size: 0.95rem;
  color: var(--text-body);
  line-height: 1.85;
  margin-bottom: 20px;
}
.sl-platform-features {
  list-style: none;
  padding: 0;
}
.sl-platform-features li {
  font-size: 0.92rem;
  color: var(--text-body);
  padding: 6px 0;
}
.sl-platform-features .check {
  color: var(--primary);
  font-weight: 700;
  margin-right: 8px;
}
.sl-platform-qr {
  text-align: center;
}

@media (max-width: 1024px) {
  .sl-intro-layout { grid-template-columns: 1fr; gap: 40px; }
  .sl-qr-grid .sl-qr-card { flex: 0 1 calc((100% - 24px) / 2); }
  .sl-platform-card { grid-template-columns: 1fr; text-align: center; }
  .sl-platform-qr { margin-top: 24px; }
}
@media (max-width: 768px) {
  .sl-qr-grid { grid-template-columns: repeat(2, 1fr); }
  .sl-qr-img { width: 110px; height: 110px; }
  .sl-stats { gap: 20px; }
  .sl-stat-num { font-size: 1.4rem; }
  .sl-platform-card { padding: 28px; }
}

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

.fade-up-delay-1 { transition-delay: 0.08s; }
.fade-up-delay-2 { transition-delay: 0.16s; }
.fade-up-delay-3 { transition-delay: 0.24s; }

/* ========================================
   响应式
======================================== */
@media (max-width: 1024px) {
  .hero .container {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .hero-visual { max-width: 480px; }

  .about-intro .container {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .cap-grid,
  .products-grid,
  .industry-grid,
  .news-grid,
  .content-grid,
  .certs-grid,
  .kb-grid,
  .team-gallery,
  .ip-grid-img {
    grid-template-columns: repeat(2, 1fr);
  }

  .certs-row {
    justify-content: center;
    gap: 16px;
  }
  .certs-row-iso .cert-card { width: 180px; }
  .certs-row-ent .cert-card, .certs-row-other .cert-card { width: 200px; }

  .system-access .container {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 768px) {
  .container { padding: 0 20px; }

  .nav-menu {
    display: none;
    position: fixed;
    top: 0;
    right: 0;
    width: 280px;
    height: 100vh;
    background: var(--white);
    flex-direction: column;
    padding: 80px 30px 30px;
    gap: 0;
    align-items: stretch;
    box-shadow: -4px 0 20px rgba(0, 0, 0, 0.1);
    overflow-y: auto;
  }

  .nav-menu.active { display: flex; }

  .nav-menu > li > a {
    padding: 14px 0;
    border-bottom: 1px solid var(--border-light);
  }

  .nav-login-group {
    flex-direction: column;
    align-items: stretch;
    padding-left: 0;
    margin-left: 0;
    border-left: none;
    padding-top: 16px;
    gap: 10px;
  }

  .nav-toggle { display: flex; z-index: 1001; }

  .hero-content h1 { font-size: 2.1rem; }
  .section-header h2,
  .process-header h2 { font-size: 1.7rem; }
  .about-text h2 { font-size: 1.6rem; }

  .section { padding: 56px 0; }

  .cap-grid,
  .products-grid,
  .industry-grid,
  .news-grid,
  .content-grid,
  .cases-grid,
  .certs-grid,
  .kb-grid,
  .team-gallery,
  .ip-grid-img {
    grid-template-columns: 1fr;
  }

  .certs-row {
    flex-direction: column;
    align-items: center;
  }
  .certs-row .cert-card {
    width: 100%;
    max-width: 400px;
  }

  .process-timeline {
    flex-direction: column;
    gap: 36px;
  }

  .process-timeline::before { display: none; }

  .dev-timeline-item {
    grid-template-columns: 80px 1fr;
    gap: 20px;
  }
  .dev-tl-year .year-num { font-size: 1.4rem; }
  .dev-tl-content { padding-left: 24px; }
  .dev-tl-content h4 { font-size: 1rem; }
  .dev-tl-content p { font-size: 0.86rem; }

  .process-stats {
    flex-direction: column;
    gap: 24px;
  }

  .hero-stats {
    flex-direction: column;
    gap: 20px;
  }

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

  .trust-logos {
    gap: 24px;
    justify-content: center;
  }

  .cta-content h2 { font-size: 1.8rem; }

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

  .page-hero h1 { font-size: 1.9rem; }

  .about-text .about-points {
    grid-template-columns: 1fr;
  }
}

/* ========================================
   v8.5 新增样式
======================================== */

/* === 新页脚布局 === */
.footer { padding: 48px 0 0; }

.footer-nav-bar {
  display: flex;
  align-items: center;
  gap: 20px;
  padding-bottom: 24px;
  margin-bottom: 32px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  flex-wrap: wrap;
}
.footer-nav-bar .fnb-label {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--white);
  white-space: nowrap;
  letter-spacing: 1px;
}
.footer-nav-bar .fnb-links {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}
.footer-nav-bar .fnb-links a {
  font-size: 0.84rem;
  color: var(--text-white-muted);
  transition: color 0.25s;
  white-space: nowrap;
}
.footer-nav-bar .fnb-links a:hover,
.footer-nav-bar .fnb-links a.fnb-active {
  color: #64B5F6;
}
.footer-nav-bar .fnb-sep {
  color: rgba(255,255,255,0.15);
  font-size: 0.8rem;
}

.footer-main {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 48px;
  align-items: flex-start;
  margin-bottom: 0;
}
.footer-contact-info { max-width: 560px; }
.footer-contact-info h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 18px;
}
.footer-contact-info .fci-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 12px;
}
.footer-contact-info .fci-label {
  font-size: 0.84rem;
  color: var(--text-white-muted);
  white-space: nowrap;
  min-width: 60px;
}
.footer-contact-info .fci-value {
  font-size: 0.84rem;
  color: var(--text-white-soft);
  line-height: 1.6;
}
.footer-qr-section {
  display: flex;
  gap: 20px;
}
.footer-qr-item { text-align: center; }
.footer-qr-item img {
  width: 110px;
  height: 110px;
  border-radius: 8px;
  border: 1px solid rgba(255,255,255,0.1);
  display: block;
  margin: 0 auto 8px;
}
.footer-qr-item .fqr-label {
  font-size: 0.76rem;
  color: var(--text-white-muted);
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 20px 0;
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-white-muted);
  margin-top: 32px;
}

/* === 证书轮播 === */
.cert-carousel { position: relative; margin-top: 48px; }
.cert-carousel-viewport { overflow: hidden; padding: 0 52px; }
.cert-carousel-track {
  display: flex;
  transition: transform 0.6s cubic-bezier(0.4,0,0.2,1);
}
.cert-carousel-slide {
  display: flex;
  gap: 28px;
  min-width: 100%;
  justify-content: center;
}
.cert-carousel-slide .cert-card { width: 240px; flex-shrink: 0; }
.cert-nav-btn {
  position: absolute;
  top: 45%;
  transform: translateY(-50%);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--white);
  border: 2px solid var(--border);
  font-size: 1.2rem;
  color: var(--primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.25s ease;
  z-index: 5;
}
.cert-nav-btn:hover {
  background: var(--primary);
  color: var(--white);
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
}
.cert-nav-prev { left: 0; }
.cert-nav-next { right: 0; }
.cert-carousel-dots {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 28px;
}
.cert-carousel-dot {
  width: 10px; height: 10px;
  border-radius: 50%;
  background: var(--border);
  cursor: pointer;
  transition: all 0.25s ease;
  border: none; padding: 0;
}
.cert-carousel-dot.active {
  background: var(--primary);
  width: 28px;
  border-radius: 5px;
}

/* === 案例标签页 === */
.case-tabs {
  display: flex;
  justify-content: center;
  gap: 0;
  margin-bottom: 40px;
  border-bottom: 2px solid var(--border);
  flex-wrap: wrap;
}
.case-tab {
  padding: 14px 28px;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-gray);
  cursor: pointer;
  position: relative;
  transition: color 0.25s ease;
  background: none;
  border: none;
  font-family: inherit;
}
.case-tab::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 3px;
  background: var(--primary);
  border-radius: 2px;
  transition: width 0.3s ease;
}
.case-tab:hover { color: var(--primary); }
.case-tab.active { color: var(--primary); }
.case-tab.active::after { width: 100%; }
.case-tab-panel { display: none; }
.case-tab-panel.active { display: block; }

.case-feature {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 0;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all 0.3s ease;
}
.case-feature:hover {
  border-color: var(--primary-lighter);
  box-shadow: var(--shadow-md);
}
.case-feature-main { padding: 36px; }
.case-feature-main .case-company {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 8px;
}
.case-feature-main h3 {
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 16px;
}
.case-feature-main .case-desc {
  font-size: 0.92rem;
  color: var(--text-gray);
  line-height: 1.9;
  margin-bottom: 28px;
}
.case-feature-metrics {
  display: flex;
  gap: 36px;
  padding-top: 24px;
  border-top: 1px solid var(--border-light);
}
.case-feature-metrics .cfm-item { text-align: center; }
.case-feature-metrics .cfm-num {
  font-size: 1.7rem;
  font-weight: 800;
  color: var(--primary);
}
.case-feature-metrics .cfm-label {
  font-size: 0.8rem;
  color: var(--text-light);
  margin-top: 4px;
}
.case-feature-side {
  background: var(--bg-light);
  padding: 36px 28px;
  display: flex;
  flex-direction: column;
  gap: 22px;
}
.case-feature-side .cfs-block h4 {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 8px;
}
.case-feature-side .cfs-block p {
  font-size: 0.84rem;
  color: var(--text-gray);
  line-height: 1.75;
}
.case-feature-side .cfs-tag {
  display: inline-block;
  font-size: 0.74rem;
  font-weight: 600;
  padding: 5px 14px;
  border-radius: 4px;
  background: var(--primary-pale);
  color: var(--primary);
  align-self: flex-start;
}

/* === 响应式补充 === */
@media (max-width: 1024px) {
  .footer-main { grid-template-columns: 1fr; gap: 32px; }
  .case-feature { grid-template-columns: 1fr; }
  .cert-carousel-viewport { padding: 0 44px; }
  .cert-carousel-slide .cert-card { width: 200px; }
}
@media (max-width: 768px) {
  .footer-nav-bar { flex-direction: column; align-items: flex-start; gap: 12px; }
  .footer-nav-bar .fnb-links { gap: 8px; }
  .footer-qr-section { justify-content: flex-start; }
  .footer-qr-item img { width: 90px; height: 90px; }
  .cert-carousel-viewport { padding: 0; }
  .cert-carousel-slide { flex-direction: column; align-items: center; }
  .cert-carousel-slide .cert-card { width: 100%; max-width: 320px; }
  .cert-nav-btn { display: none; }
  .case-tabs { gap: 4px; }
  .case-tab { padding: 10px 16px; font-size: 0.85rem; }
  .case-feature-main { padding: 24px; }
  .case-feature-side { padding: 24px; }
  .case-feature-metrics { gap: 20px; }
}

/* ========================================
   资讯洞察子栏目导航（仿腾讯媒体页）
======================================== */
.page-subnav {
  position: sticky;
  top: 70px;
  background: #fff;
  z-index: 900;
  border-bottom: 1px solid #e5e7eb;
  box-shadow: 0 2px 8px rgba(0,0,0,0.04);
}
.subnav-tabs {
  display: flex;
  gap: 0;
  justify-content: center;
  align-items: center;
  list-style: none;
  padding: 0;
  margin: 0;
}
.subnav-tab {
  display: inline-block;
  padding: 16px 40px;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-body);
  text-decoration: none;
  position: relative;
  transition: color 0.2s ease;
  cursor: pointer;
}
.subnav-tab::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 3px;
  background: var(--primary);
  border-radius: 3px 3px 0 0;
  transition: width 0.25s ease;
}
.subnav-tab.active::after,
.subnav-tab:hover::after {
  width: 60%;
}
.subnav-tab.active,
.subnav-tab:hover {
  color: var(--primary);
}
@media (max-width: 768px) {
  .subnav-tab { padding: 14px 24px; font-size: 0.9rem; }
}