/* ========================================
   浚发技术官网 - 自定义样式
   基于 Tailwind CSS + 自定义设计系统
   ======================================== */

:root {
  --primary: #f05228;
  --primary-dark: #d63a12;
  --primary-light: #fff5f2;
  --secondary: #0ea5e9;
  --secondary-dark: #0284c7;
  --accent: #f59e0b;
  --dark: #1e293b;
  --darker: #0f172a;
  --gray: #64748b;
  --light-gray: #f1f5f9;
  --white: #ffffff;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
  --shadow: 0 10px 40px rgba(0,0,0,0.08);
  --shadow-lg: 0 25px 60px rgba(0,0,0,0.12);
  --shadow-primary: 0 12px 32px rgba(240,82,40,0.25);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 基础重置 */
*, *::before, *::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Noto Sans SC", "Source Han Sans SC", "WenQuanYi Micro Hei", sans-serif;
  color: var(--dark);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

/* 滚动条美化 */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: #f1f5f9;
}
::-webkit-scrollbar-thumb {
  background: #cbd5e1;
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: #94a3b8;
}

/* 按钮系统 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 9999px;
  font-weight: 600;
  font-size: 15px;
  transition: var(--transition);
  cursor: pointer;
  border: none;
  outline: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: white;
  box-shadow: var(--shadow-primary);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 40px rgba(240,82,40,0.35);
}

.btn-secondary {
  background: white;
  color: var(--primary);
  border: 2px solid rgba(240,82,40,0.15);
}
.btn-secondary:hover {
  background: var(--primary-light);
  border-color: var(--primary);
}

.btn-outline {
  background: transparent;
  color: white;
  border: 2px solid rgba(255,255,255,0.4);
}
.btn-outline:hover {
  background: rgba(255,255,255,0.1);
  border-color: white;
}

/* 导航栏 */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: 76px;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(0,0,0,0.04);
  transition: var(--transition);
}

.navbar.scrolled {
  box-shadow: var(--shadow-sm);
  background: rgba(255,255,255,0.98);
}

.navbar-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.logo-icon {
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 800;
  font-size: 18px;
  box-shadow: var(--shadow-primary);
}

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

.logo-title {
  font-size: 20px;
  font-weight: 800;
  color: var(--darker);
  line-height: 1.2;
  letter-spacing: -0.5px;
}

.logo-subtitle {
  font-size: 12px;
  color: var(--gray);
  font-weight: 500;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-link {
  padding: 8px 16px;
  color: var(--dark);
  text-decoration: none;
  font-size: 15px;
  font-weight: 500;
  border-radius: 8px;
  transition: var(--transition);
  position: relative;
}

.nav-link:hover,
.nav-link.active {
  color: var(--primary);
  background: var(--primary-light);
}

.nav-link.active::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 16px;
  right: 16px;
  height: 3px;
  background: var(--primary);
  border-radius: 3px;
}

.nav-cta {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-phone {
  font-size: 14px;
  font-weight: 700;
  color: var(--primary);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 6px;
}

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  background: none;
  border: none;
  cursor: pointer;
}

.mobile-menu-btn span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--dark);
  transition: var(--transition);
  border-radius: 2px;
}

.mobile-menu-btn.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}
.mobile-menu-btn.active span:nth-child(2) {
  opacity: 0;
}
.mobile-menu-btn.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

.mobile-menu {
  display: none;
  position: fixed;
  top: 76px;
  left: 0;
  right: 0;
  bottom: 0;
  background: white;
  z-index: 999;
  padding: 24px;
  flex-direction: column;
  gap: 8px;
  overflow-y: auto;
}

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

.mobile-menu .nav-link {
  padding: 16px;
  font-size: 17px;
  border-bottom: 1px solid var(--light-gray);
}

/* Hero Banner */
.hero {
  position: relative;
  min-height: 720px;
  display: flex;
  align-items: center;
  overflow: hidden;
  margin-top: 76px;
}

.hero-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 1s ease-in-out;
  background-size: cover;
  background-position: center;
}

.hero-slide.active {
  opacity: 1;
}

.hero-slide::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(105deg, rgba(15,23,42,0.9) 0%, rgba(15,23,42,0.72) 45%, rgba(15,23,42,0.35) 100%);
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 1280px;
  margin: 0 auto;
  padding: 80px 24px;
  width: 100%;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,255,255,0.12);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255,255,255,0.18);
  color: white;
  padding: 8px 18px;
  border-radius: 9999px;
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 24px;
}

.hero-title {
  font-size: 56px;
  font-weight: 800;
  color: white;
  line-height: 1.15;
  margin-bottom: 20px;
  max-width: 720px;
  letter-spacing: -1px;
  text-shadow: 0 2px 12px rgba(0,0,0,0.35);
  font-family: inherit;
}

.hero-title .highlight {
  background: linear-gradient(135deg, #fbbf24 0%, #f97316 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-desc {
  font-size: 20px;
  color: rgba(255,255,255,0.85);
  max-width: 580px;
  margin-bottom: 36px;
  line-height: 1.7;
}

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

.hero-stats {
  display: flex;
  gap: 56px;
  flex-wrap: wrap;
  margin-top: 12px;
}

.hero-stat-group {
  flex: 1;
  min-width: 300px;
}

.hero-stat-group-title {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 2px;
  color: rgba(255,255,255,0.65);
  margin-bottom: 18px;
  padding: 5px 14px;
  border: 1px solid rgba(255,255,255,0.22);
  border-radius: 9999px;
  background: rgba(255,255,255,0.06);
  white-space: nowrap;
}

.hero-stat-row {
  display: flex;
  gap: 32px;
  flex-wrap: wrap;
}

.hero-stat {
  display: flex;
  flex-direction: column;
}

.hero-stat-number {
  font-size: 30px;
  font-weight: 800;
  color: white;
  line-height: 1.1;
}

.hero-stat-label {
  font-size: 13px;
  color: rgba(255,255,255,0.75);
  margin-top: 6px;
}

.hero-stat-sub {
  font-size: 11px;
  color: rgba(255,255,255,0.45);
  margin-top: 3px;
}

.hero-dots {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 12px;
  z-index: 3;
}

.hero-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: rgba(255,255,255,0.3);
  border: 2px solid transparent;
  cursor: pointer;
  transition: var(--transition);
}

.hero-dot.active {
  background: white;
  border-color: var(--primary);
  transform: scale(1.2);
}

/* Section通用 */
.section {
  padding: 100px 24px;
}

.section-container {
  max-width: 1280px;
  margin: 0 auto;
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 64px;
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--primary);
  font-size: 14px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 12px;
}

.section-label::before,
.section-label::after {
  content: "";
  width: 24px;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
}

.section-title {
  font-size: 40px;
  font-weight: 800;
  color: var(--darker);
  margin-bottom: 16px;
  line-height: 1.2;
}

.section-desc {
  font-size: 18px;
  color: var(--gray);
}

/* 信任条 */
.trust-bar {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  padding: 32px 24px;
  margin-top: -40px;
  position: relative;
  z-index: 10;
  border-radius: 0;
}

.trust-container {
  max-width: 1280px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.trust-item {
  display: flex;
  align-items: center;
  gap: 16px;
  color: white;
  padding: 16px;
}

.trust-icon {
  width: 52px;
  height: 52px;
  background: rgba(255,255,255,0.15);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  flex-shrink: 0;
}

.trust-text h4 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 4px;
}

.trust-text p {
  font-size: 14px;
  opacity: 0.85;
}

/* 卡片 */
.card {
  background: white;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
  border: 1px solid rgba(0,0,0,0.04);
}

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

.card-image {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16/10;
}

.card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

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

.card-body {
  padding: 24px;
}

.card-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--darker);
  margin-bottom: 10px;
}

.card-desc {
  font-size: 15px;
  color: var(--gray);
  margin-bottom: 16px;
  line-height: 1.6;
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--primary);
  font-weight: 600;
  font-size: 14px;
  text-decoration: none;
}

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

/* 产品卡片 */
.product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.product-card {
  background: white;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
  border: 1px solid rgba(0,0,0,0.04);
  position: relative;
}

.product-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}

.product-card .tag {
  position: absolute;
  top: 16px;
  right: 16px;
  background: var(--primary);
  color: white;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
  z-index: 2;
}

.product-image {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: #f1f5f9;
  display: flex;
  align-items: center;
  justify-content: center;
}

.product-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

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

@media (max-width: 768px) {
  .product-image {
    aspect-ratio: 16 / 9;
  }
}

.product-body {
  padding: 24px;
}

.product-name {
  font-size: 20px;
  font-weight: 700;
  color: var(--darker);
  margin-bottom: 8px;
}

.product-feature {
  font-size: 14px;
  color: var(--gray);
  margin-bottom: 16px;
}

.product-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.product-price {
  font-size: 14px;
  color: var(--gray);
}

.product-price strong {
  color: var(--primary);
  font-size: 18px;
}

/* 场景网格 */
.scenario-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.scenario-card {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  aspect-ratio: 4/3;
  box-shadow: var(--shadow);
  cursor: pointer;
}

.scenario-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.scenario-card:hover img {
  transform: scale(1.08);
}

.scenario-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(15,23,42,0.85) 0%, rgba(15,23,42,0.2) 60%, transparent 100%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 24px;
  transition: var(--transition);
}

.scenario-card:hover .scenario-overlay {
  background: linear-gradient(to top, rgba(15,23,42,0.92) 0%, rgba(15,23,42,0.4) 80%, rgba(15,23,42,0.1) 100%);
}

.scenario-icon {
  width: 48px;
  height: 48px;
  background: var(--primary);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 22px;
  margin-bottom: 12px;
}

.scenario-title {
  font-size: 22px;
  font-weight: 700;
  color: white;
  margin-bottom: 6px;
}

.scenario-desc {
  font-size: 14px;
  color: rgba(255,255,255,0.8);
  line-height: 1.5;
}

/* 案例卡片 */
.case-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.case-card .card-image {
  aspect-ratio: 16/10;
}

.case-result {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--primary-light);
  color: var(--primary);
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 700;
}

/* 视频展示 */
.video-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.video-card {
  background: #fff;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
}

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

.video-wrapper {
  position: relative;
  aspect-ratio: 16 / 9;
  background: #000;
}

.video-wrapper video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.video-caption {
  padding: 18px 20px;
}

.video-caption h4 {
  font-size: 17px;
  font-weight: 700;
  color: var(--darker);
  margin-bottom: 6px;
}

.video-caption p {
  font-size: 14px;
  color: var(--gray);
  line-height: 1.6;
  margin: 0;
}

.video-single {
  max-width: 960px;
  margin: 0 auto;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  background: #000;
}

.video-single video {
  width: 100%;
  display: block;
  aspect-ratio: 16 / 9;
}

@media (max-width: 768px) {
  .video-grid {
    grid-template-columns: 1fr;
  }
}

/* CTA横幅 */
.cta-banner {
  position: relative;
  padding: 120px 24px;
  overflow: hidden;
  background: var(--darker);
}

.cta-banner-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
}

.cta-banner-bg::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(15,23,42,0.95) 0%, rgba(15,23,42,0.7) 60%, rgba(15,23,42,0.4) 100%);
}

.cta-content {
  position: relative;
  z-index: 2;
  max-width: 1280px;
  margin: 0 auto;
}

.cta-title {
  font-size: 42px;
  font-weight: 800;
  color: white;
  margin-bottom: 16px;
  max-width: 640px;
}

.cta-desc {
  font-size: 18px;
  color: rgba(255,255,255,0.8);
  margin-bottom: 32px;
  max-width: 560px;
}

/* 关于我们 */
.about-hero {
  padding: 140px 24px 80px;
  background: linear-gradient(135deg, #f8fafc 0%, #fff5f2 100%);
  margin-top: 76px;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.about-image {
  position: relative;
}

.about-image img {
  width: 100%;
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
}

.about-image .experience-badge {
  position: absolute;
  bottom: -24px;
  right: -24px;
  background: var(--primary);
  color: white;
  padding: 24px 32px;
  border-radius: var(--radius);
  box-shadow: var(--shadow-primary);
}

.experience-badge .number {
  font-size: 42px;
  font-weight: 800;
  line-height: 1;
}

.experience-badge .text {
  font-size: 14px;
  opacity: 0.9;
  margin-top: 4px;
}

.about-content h2 {
  font-size: 36px;
  font-weight: 800;
  color: var(--darker);
  margin-bottom: 20px;
  line-height: 1.2;
}

.about-content p {
  font-size: 16px;
  color: var(--gray);
  margin-bottom: 16px;
  line-height: 1.8;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-top: 32px;
}

.feature-item {
  display: flex;
  gap: 16px;
  padding: 20px;
  background: white;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

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

.feature-icon {
  width: 48px;
  height: 48px;
  background: var(--primary-light);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 22px;
  flex-shrink: 0;
}

.feature-text h4 {
  font-size: 17px;
  font-weight: 700;
  color: var(--darker);
  margin-bottom: 6px;
}

.feature-text p {
  font-size: 14px;
  color: var(--gray);
  margin: 0;
  line-height: 1.6;
}

/* 页脚 */
.footer {
  background: var(--darker);
  color: white;
  padding: 80px 24px 0;
}

.footer-container {
  max-width: 1280px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: 48px;
  padding-bottom: 64px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.footer-brand .logo-title {
  color: white;
}

.footer-brand .logo-subtitle {
  color: rgba(255,255,255,0.6);
}

.footer-desc {
  margin: 20px 0;
  color: rgba(255,255,255,0.65);
  font-size: 15px;
  line-height: 1.7;
}

.footer-title {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 20px;
  color: white;
}

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

.footer-links a {
  color: rgba(255,255,255,0.65);
  text-decoration: none;
  font-size: 15px;
  transition: var(--transition);
}

.footer-links a:hover {
  color: var(--primary);
  padding-left: 4px;
}

.footer-contact p {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  color: rgba(255,255,255,0.65);
  font-size: 15px;
  margin-bottom: 14px;
  line-height: 1.6;
}

.footer-qr {
  width: 120px;
  height: 120px;
  background: white;
  border-radius: 12px;
  padding: 8px;
  margin-top: 12px;
}

.footer-qr img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.footer-bottom {
  max-width: 1280px;
  margin: 0 auto;
  padding: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: rgba(255,255,255,0.5);
  font-size: 14px;
}

/* AI助手 */
.ai-assistant {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 9999;
  font-family: "PingFang SC", sans-serif;
}

.ai-toggle {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: var(--shadow-primary);
  position: relative;
  transition: var(--transition);
  border: none;
  font-size: 28px;
}

.ai-toggle:hover {
  transform: scale(1.05);
}

.ai-toggle .pulse {
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  border: 2px solid var(--primary);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { transform: scale(1); opacity: 0.6; }
  100% { transform: scale(1.3); opacity: 0; }
}

.ai-badge {
  position: absolute;
  top: -4px;
  right: -4px;
  background: #22c55e;
  color: white;
  font-size: 11px;
  padding: 3px 8px;
  border-radius: 10px;
  font-weight: 600;
}

.ai-chat-window {
  position: absolute;
  bottom: 84px;
  right: 0;
  width: 380px;
  height: 540px;
  background: white;
  border-radius: 24px;
  box-shadow: var(--shadow-lg);
  display: none;
  flex-direction: column;
  overflow: hidden;
  border: 1px solid rgba(0,0,0,0.06);
}

.ai-chat-window.active {
  display: flex;
}

.ai-chat-header {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: white;
  padding: 18px 20px;
  display: flex;
  align-items: center;
  gap: 14px;
}

.ai-avatar {
  width: 44px;
  height: 44px;
  background: rgba(255,255,255,0.2);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
}

.ai-info h4 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 2px;
}

.ai-info p {
  font-size: 13px;
  opacity: 0.85;
}

.ai-close {
  margin-left: auto;
  background: none;
  border: none;
  color: white;
  font-size: 20px;
  cursor: pointer;
  padding: 4px;
}

.ai-quick-replies {
  display: flex;
  gap: 8px;
  padding: 14px;
  flex-wrap: wrap;
  background: #f8fafc;
  border-bottom: 1px solid #f1f5f9;
}

.ai-quick-replies button {
  font-size: 13px;
  border: 1px solid var(--primary);
  color: var(--primary);
  background: white;
  border-radius: 16px;
  padding: 6px 14px;
  cursor: pointer;
  transition: var(--transition);
}

.ai-quick-replies button:hover {
  background: var(--primary);
  color: white;
}

.ai-chat-body {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
  background: #f8fafc;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.ai-msg {
  max-width: 82%;
  padding: 12px 16px;
  border-radius: 18px;
  font-size: 14px;
  line-height: 1.6;
  animation: msgIn 0.3s ease;
}

@keyframes msgIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.ai-msg.bot {
  background: white;
  border: 1px solid #e2e8f0;
  color: var(--dark);
  align-self: flex-start;
  border-bottom-left-radius: 6px;
}

.ai-msg.user {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: white;
  align-self: flex-end;
  border-bottom-right-radius: 6px;
}

.ai-msg.system {
  background: #fff7ed;
  border: 1px solid #fed7aa;
  color: #9a3412;
  align-self: center;
  font-size: 12px;
  padding: 8px 14px;
}

.ai-input-area {
  padding: 14px;
  background: white;
  border-top: 1px solid #f1f5f9;
  display: flex;
  gap: 10px;
}

.ai-input-area input {
  flex: 1;
  border: 1px solid #e2e8f0;
  border-radius: 24px;
  padding: 10px 18px;
  font-size: 14px;
  outline: none;
  transition: var(--transition);
}

.ai-input-area input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(240,82,40,0.1);
}

.ai-input-area button {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--primary);
  color: white;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.ai-input-area button:hover {
  background: var(--primary-dark);
}

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

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

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid #e2e8f0;
  border-radius: 12px;
  font-size: 15px;
  transition: var(--transition);
  outline: none;
  background: white;
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(240,82,40,0.1);
}

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

/* 联系页面 */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 48px;
  align-items: start;
}

.contact-info-card {
  background: white;
  border-radius: var(--radius);
  padding: 40px;
  box-shadow: var(--shadow);
}

.contact-info-item {
  display: flex;
  gap: 18px;
  margin-bottom: 28px;
}

.contact-info-item:last-child {
  margin-bottom: 0;
}

.contact-info-icon {
  width: 52px;
  height: 52px;
  background: var(--primary-light);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 22px;
  flex-shrink: 0;
}

.contact-info-text h4 {
  font-size: 17px;
  font-weight: 700;
  color: var(--darker);
  margin-bottom: 6px;
}

.contact-info-text p {
  font-size: 15px;
  color: var(--gray);
  line-height: 1.6;
}

.contact-form-card {
  background: white;
  border-radius: var(--radius);
  padding: 40px;
  box-shadow: var(--shadow);
}

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

.news-meta {
  display: flex;
  gap: 16px;
  margin-bottom: 12px;
  font-size: 13px;
  color: var(--gray);
}

.news-category {
  color: var(--primary);
  font-weight: 600;
}

/* 合作伙伴 */
.partner-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 24px;
  align-items: center;
  opacity: 0.7;
}

.partner-item {
  background: white;
  border-radius: var(--radius-sm);
  padding: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-sm);
  height: 80px;
  font-weight: 700;
  color: var(--gray);
}

/* 面包屑 */
.page-header {
  padding: 160px 24px 80px;
  margin-top: 76px;
  background: linear-gradient(135deg, #f8fafc 0%, #ffffff 100%);
  background-size: cover;
  background-position: center;
  position: relative;
  overflow: hidden;
}

.page-header::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(248,250,252,0.72);
  z-index: 1;
}

.page-header::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 55%;
  height: 100%;
  background: radial-gradient(circle at 85% 50%, rgba(240,82,40,0.10) 0%, transparent 55%);
  z-index: 1;
}

.page-header-content {
  position: relative;
  z-index: 2;
  max-width: 1280px;
  margin: 0 auto;
}

.page-header h1 {
  font-size: 48px;
  font-weight: 800;
  color: var(--darker);
  margin-bottom: 16px;
}

.page-header p {
  font-size: 18px;
  color: var(--gray);
  max-width: 600px;
}

.breadcrumb {
  display: flex;
  gap: 12px;
  color: var(--gray);
  font-size: 14px;
  margin-bottom: 24px;
}

.breadcrumb a {
  color: var(--darker);
  text-decoration: none;
}

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

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

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

/* 响应式 */
@media (max-width: 1024px) {
  .nav-menu,
  .nav-cta .btn {
    display: none;
  }
  .mobile-menu-btn {
    display: flex;
  }
  .hero-title {
    font-size: 42px;
  }
  .trust-container {
    grid-template-columns: repeat(2, 1fr);
  }
  .product-grid,
  .scenario-grid,
  .case-grid,
  .news-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .about-grid,
  .contact-grid {
    grid-template-columns: 1fr;
  }
  .footer-container {
    grid-template-columns: repeat(2, 1fr);
  }
  .partner-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 768px) {
  .hero {
    min-height: 600px;
  }
  .hero-title {
    font-size: 32px;
  }
  .hero-desc {
    font-size: 16px;
  }
  .hero-stats {
    gap: 32px;
  }
  .hero-stat-group {
    min-width: 100%;
  }
  .hero-stat-row {
    gap: 24px;
  }
  .hero-stat-number {
    font-size: 26px;
  }
  .section {
    padding: 70px 20px;
  }
  .section-title {
    font-size: 28px;
  }
  .trust-container {
    grid-template-columns: 1fr;
  }
  .product-grid,
  .scenario-grid,
  .case-grid,
  .news-grid,
  .feature-grid,
  .partner-grid {
    grid-template-columns: 1fr;
  }
  .cta-title {
    font-size: 28px;
  }
  .footer-container {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .footer-bottom {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }
  .ai-chat-window {
    width: calc(100vw - 40px);
    right: -10px;
  }
  .about-image .experience-badge {
    right: 0;
    bottom: -16px;
    padding: 16px 24px;
  }
  .experience-badge .number {
    font-size: 32px;
  }
  .page-header h1 {
    font-size: 34px;
  }
}

/* 装饰元素 */
.gradient-text {
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.divider {
  width: 60px;
  height: 4px;
  background: linear-gradient(90deg, var(--primary) 0%, var(--accent) 100%);
  border-radius: 2px;
  margin: 20px 0;
}

.bg-pattern {
  background-image: radial-gradient(circle at 1px 1px, rgba(0,0,0,0.04) 1px, transparent 0);
  background-size: 40px 40px;
}

/* ===== 品牌案例免责说明框（新闻/案例） ===== */
.news-disclaimer, .case-disclaimer {
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  border-left: 4px solid var(--primary);
  border-radius: 12px;
  padding: 16px 20px;
  margin: 0 0 30px;
  color: #475569;
  font-size: 15px;
  line-height: 1.85;
}
.news-disclaimer strong, .case-disclaimer strong {
  color: var(--darker);
}

/* ===== 认证编码文字（关于页证书旁） ===== */
.cert-code {
  display: inline-block;
  margin-top: 14px;
  padding: 8px 16px;
  background: #fff7f4;
  border: 1px solid rgba(240,82,40,.25);
  border-radius: 10px;
  font-size: 15px;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: .5px;
}
.cert-code-label {
  font-weight: 500;
  color: var(--gray);
  margin-right: 6px;
}

/* ===== 产品适用场景说明 ===== */
.product-scene {
  font-size: 13.5px;
  color: var(--gray);
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px dashed #e8edf3;
  line-height: 1.7;
}
.product-scene b { color: var(--darker); }

/* ===== 首页"关于李美春"引导条 ===== */
.about-band { background: linear-gradient(135deg, #fff7f4 0%, #fef2f2 100%); }
.about-band .about-band-inner {
  display: flex;
  align-items: center;
  gap: 28px;
  flex-wrap: wrap;
}
.about-band .about-band-avatar {
  width: 84px; height: 84px; border-radius: 20px;
  background: var(--primary); color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 38px; font-weight: 800; flex-shrink: 0;
  box-shadow: 0 10px 24px rgba(240,82,40,.25);
}
.about-band .about-band-text { flex: 1; min-width: 260px; }
.about-band .about-band-text h3 { font-size: 22px; font-weight: 800; color: var(--darker); margin-bottom: 8px; }
.about-band .about-band-text p { color: #475569; line-height: 1.8; font-size: 15.5px; margin: 0; }
.about-band .about-band-cta { flex-shrink: 0; }
@media (max-width: 768px) {
  .about-band .about-band-inner { gap: 18px; }
  .about-band .about-band-avatar { width: 64px; height: 64px; font-size: 28px; }
}