/* ========================================
   上城信息官方网站 - 全局样式 V2
   微盟风格：大标题、深色商务风、柔和动效
   ======================================== */

/* --- CSS Variables --- */
:root {
  --color-primary: #0f1b2d;
  --color-primary-light: #1a3a5c;
  --color-accent: #1a5fb4;
  --color-accent-hover: #3584e4;
  --color-light-blue: #e8eef6;
  --color-text-white: #ffffff;
  --color-text-light: rgba(255,255,255,0.85);
  --color-text-muted: rgba(255,255,255,0.55);
  --color-text-dark: #1a1a2e;
  --color-text-gray: #6b7280;
  --color-bg-white: #ffffff;
  --color-bg-gray: #f3f4f6;
  --color-border: #e5e7eb;
  --font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-light: 300;
  --font-regular: 400;
  --font-medium: 500;
  --font-bold: 700;
  --max-width: 1360px;
  --section-padding: 80px;
  --card-padding: 32px;
  --card-radius: 12px;
  --btn-radius: 6px;
  --shadow-card: 0 4px 20px rgba(0,0,0,0.08);
  --shadow-hover: 0 12px 32px rgba(0,0,0,0.12);
  --shadow-dark: 0 4px 20px rgba(0,0,0,0.2);
  --transition: 0.3s ease;
  --transition-smooth: 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

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

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

body {
  font-family: var(--font-family);
  font-weight: var(--font-regular);
  color: var(--color-text-dark);
  background-color: var(--color-bg-white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

ul, ol {
  list-style: none;
}

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

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

.section-title {
  font-size: 32px;
  font-weight: var(--font-bold);
  color: var(--color-text-dark);
  text-align: center;
  margin-bottom: 8px;
  letter-spacing: -0.5px;
}

.section-subtitle {
  font-size: 15px;
  color: var(--color-text-gray);
  text-align: center;
  margin-bottom: 40px;
  font-weight: var(--font-light);
}

/* --- Buttons --- */
.btn {
  display: inline-block;
  padding: 14px 36px;
  font-size: 15px;
  font-weight: var(--font-medium);
  border-radius: var(--btn-radius);
  cursor: pointer;
  transition: all var(--transition);
  border: none;
  text-align: center;
  line-height: 1.5;
  letter-spacing: 0.3px;
}

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

.btn-primary:hover {
  background-color: var(--color-accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(26, 95, 180, 0.3);
}

.btn-outline {
  background-color: transparent;
  color: var(--color-text-light);
  border: 1px solid rgba(255,255,255,0.3);
}

.btn-outline:hover {
  border-color: #fff;
  color: #fff;
  background-color: rgba(255,255,255,0.08);
}

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

.btn-white:hover {
  background-color: var(--color-light-blue);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(255,255,255,0.2);
}

/* --- Header / Navigation --- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  transition: all var(--transition);
}

.site-header.scrolled {
  background-color: rgba(255,255,255,0.97);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 1px 3px rgba(0,0,0,0.06);
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  transition: opacity var(--transition);
  flex-shrink: 0;
}

.logo:hover {
  opacity: 0.9;
}

.logo-img {
  height: 30px;
  width: auto;
  display: block;
}

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

.nav-link {
  font-size: 18px;
  color: rgba(255,255,255,0.85);
  transition: color var(--transition);
  position: relative;
  padding: 4px 0;
  letter-spacing: 0.5px;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 50%;
  width: 0;
  height: 2px;
  background-color: var(--color-accent);
  transition: all var(--transition);
  transform: translateX(-50%);
  border-radius: 1px;
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.scrolled .nav-link {
  color: var(--color-text-gray);
}

.scrolled .nav-link:hover,
.scrolled .nav-link.active {
  color: var(--color-accent);
}

.nav-link:hover {
  color: #fff;
}

/* --- Mobile Menu --- */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  background: none;
  border: none;
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: #fff;
  transition: all var(--transition);
  border-radius: 1px;
}

.scrolled .menu-toggle span {
  background-color: var(--color-text-dark);
}

.mobile-nav {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(15,27,45,0.98);
  z-index: 999;
  align-items: center;
  justify-content: center;
}

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

.mobile-nav-list {
  text-align: center;
}

.mobile-nav-list li {
  margin-bottom: 28px;
}

.mobile-nav-list a {
  font-size: 22px;
  color: rgba(255,255,255,0.85);
  transition: color var(--transition);
  font-weight: var(--font-medium);
  letter-spacing: 1px;
}

.mobile-nav-list a:hover {
  color: #fff;
}

.mobile-nav-close {
  position: absolute;
  top: 24px;
  right: 24px;
  width: 40px;
  height: 40px;
  background: none;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

.mobile-nav-close span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: #fff;
  position: relative;
  transform: rotate(45deg);
}

.mobile-nav-close span::before {
  content: '';
  position: absolute;
  width: 24px;
  height: 2px;
  background-color: #fff;
  transform: rotate(-90deg);
}

/* ========================================
   HERO CAROUSEL
   ======================================== */
.hero-carousel {
  position: relative;
  height: 100vh;
  min-height: 680px;
  overflow: hidden;
  background-color: var(--color-primary);
}

.hero-slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.8s ease, transform 0.8s ease;
  transform: scale(1.06);
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  pointer-events: none;
}

.hero-slide-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(15,27,45,0.85) 0%, rgba(15,27,45,0.65) 50%, rgba(15,27,45,0.4) 100%);
  z-index: 1;
  pointer-events: none;
}

/* Hero slide background overlay - 降低透明度让文字更明亮 */
.hero-slide::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(0,0,0,0.4) 0%, rgba(0,0,0,0.2) 50%, rgba(0,0,0,0.1) 100%);
  pointer-events: none;
  z-index: 1;
}

.hero-slide.active {
  opacity: 1;
  transform: scale(1);
  z-index: 2;
  pointer-events: auto;
}

.hero-slide.prev {
  opacity: 0;
  transform: scale(0.94);
  z-index: 1;
}

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

.hero-slide-bg.grid-pattern {
  background-image:
    linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 60px 60px;
}

.hero-slide-bg.glow {
  position: absolute;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.12;
}

.hero-slide-bg.glow.g1 {
  top: -100px;
  right: -100px;
  background: var(--color-accent);
}

.hero-slide-bg.glow.g2 {
  bottom: -150px;
  left: -100px;
  background: #2563eb;
}

.hero-slide-bg.glow.g3 {
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: #1d4ed8;
  width: 400px;
  height: 400px;
}

.hero-slide-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 900px;
  padding: 0 24px;
}

.hero-slide-badge,
.hero-slide-title,
.hero-slide-desc,
.hero-slide-actions {
  opacity: 0;
  transform: translateY(50px);
}

.hero-slide.active .hero-slide-badge {
  animation: heroFadeUp 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94) 0.1s forwards;
}

.hero-slide.active .hero-slide-title {
  animation: heroFadeUp 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94) 0.25s forwards;
}

.hero-slide.active .hero-slide-desc {
  animation: heroFadeUp 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94) 0.4s forwards;
}

.hero-slide.active .hero-slide-actions {
  animation: heroFadeUp 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94) 0.55s forwards;
}

@keyframes heroFadeUp {
  from {
    opacity: 0;
    transform: translateY(50px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero-slide-title {
  font-size: 56px;
  font-weight: var(--font-bold);
  color: #fff;
  line-height: 1.2;
  margin-bottom: 20px;
  letter-spacing: -1.5px;
  text-shadow: 0 2px 20px rgba(0,0,0,0.3);
}

.hero-slide-desc {
  font-size: 20px;
  color: rgba(255,255,255,0.85);
  font-weight: var(--font-light);
  line-height: 1.6;
  margin-bottom: 36px;
  text-shadow: 0 1px 10px rgba(0,0,0,0.2);
}
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
}

.hero-slide-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* Carousel Controls */
.hero-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 10;
  width: 52px;
  height: 52px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition);
  color: rgba(255,255,255,0.6);
  backdrop-filter: blur(8px);
}

.hero-arrow:hover {
  background: rgba(255,255,255,0.12);
  border-color: rgba(255,255,255,0.2);
  color: #fff;
}

.hero-arrow-left {
  left: 32px;
}

.hero-arrow-right {
  right: 32px;
}

.hero-arrow svg {
  width: 20px;
  height: 20px;
}

/* Carousel Dots */
.hero-dots {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 10;
  display: flex;
  gap: 12px;
}

.hero-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: rgba(255,255,255,0.25);
  cursor: pointer;
  transition: all var(--transition);
  border: none;
}

.hero-dot.active {
  background: #fff;
  width: 32px;
  border-radius: 4px;
}

/* --- Business Section --- */
.business-section {
  padding: 60px 0;
  background-color: var(--color-bg-white);
}

.business-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.business-card {
  background-color: var(--color-bg-white);
  border-radius: 14px;
  padding: 24px 22px 20px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.05);
  transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  cursor: pointer;
  border: 1px solid rgba(0,0,0,0.06);
  display: block;
  position: relative;
  overflow: hidden;
}

.business-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent), #4a90d9);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

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

.business-card:hover {
  box-shadow: 0 10px 30px rgba(26, 95, 180, 0.12);
  transform: translateY(-4px);
  border-color: rgba(26, 95, 180, 0.15);
}

.business-card-icon {
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, var(--color-light-blue) 0%, #dce6f2 100%);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--color-accent);
  transition: all 0.4s ease;
}

.business-card:hover .business-card-icon {
  background: linear-gradient(135deg, var(--color-accent) 0%, #4a90d9 100%);
  color: #fff;
  border-radius: 10px;
}

.card-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 14px;
}

.business-card-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-text-dark);
  letter-spacing: -0.3px;
}

.business-card-desc {
  font-size: 15px;
  color: var(--color-text-gray);
  line-height: 1.6;
  margin-bottom: 14px;
}

.business-card-features {
  list-style: none;
  padding: 0;
  margin: 0 0 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.business-card-features li {
  font-size: 14px;
  color: #374151;
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 400;
  transition: all 0.3s ease;
}

.business-card-features li svg {
  flex-shrink: 0;
  color: var(--color-accent);
  opacity: 0.7;
}

.business-card:hover .business-card-features li {
  color: var(--color-text-dark);
}

.business-card-link {
  font-size: 15px;
  color: var(--color-accent);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
  transition: all 0.3s ease;
  border-bottom: 1px solid transparent;
}

.business-card:hover .business-card-link {
  gap: 12px;
  border-bottom-color: var(--color-accent);
}

.business-card-link svg {
  transition: transform 0.3s ease;
}

.business-card:hover .business-card-link svg {
  transform: translateX(2px);
}

/* --- Solutions Slim (业务全景屏"解决方案精选" - 整合模式) --- */
.solutions-slim {
  margin-top: 32px;
}

.solutions-slim-header {
  text-align: center;
  margin-bottom: 18px;
}

.solutions-slim-header h3 {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-text-dark);
  letter-spacing: -0.3px;
}

.solutions-slim-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 24px;
}

.solutions-slim-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  background: var(--color-bg-white);
  border-radius: 8px;
  border: 1px solid var(--color-border);
  transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  text-decoration: none;
  cursor: pointer;
}

.solutions-slim-item:hover {
  border-color: var(--color-accent);
  box-shadow: 0 4px 14px rgba(26, 95, 180, 0.08);
  transform: translateY(-2px);
}

.slim-icon {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: transform 0.3s ease;
}

.slim-icon svg {
  width: 18px;
  height: 18px;
}

.solutions-slim-item:hover .slim-icon {
  transform: scale(1.08);
}

.slim-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text-dark);
  line-height: 1.3;
}

/* 查看全部解决方案卡片（网格第9项） */
.solutions-slim-more-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  background: var(--color-accent);
  border: 1px dashed rgba(255,255,255,0.4);
  border-radius: 8px;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.3s ease;
}

.solutions-slim-more-item:hover {
  background: var(--color-accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(26,95,180,0.2);
}

.solutions-slim-more-item .slim-icon {
  background: rgba(255,255,255,0.2) !important;
}

.solutions-slim-more-item .slim-icon svg {
  color: #fff;
}

.solutions-slim-more-item .slim-name {
  color: #fff;
  font-size: 14px;
}

/* --- Clients Section --- */
.clients-section {
  padding: var(--section-padding) 0;
  background-color: var(--color-bg-gray);
}

.clients-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
  min-height: 90px;
}

.client-card {
  background-color: var(--color-bg-white);
  border-radius: 10px;
  padding: 14px 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
  border: 1px solid var(--color-border);
  min-height: 120px;
}

.client-card .client-logo {
  max-width: 90%;
  /*max-height: 64px;*/
  object-fit: contain;
  filter: grayscale(0%) brightness(1);
  transition: all var(--transition);
}

.client-card:hover .client-logo {
  filter: grayscale(0%) brightness(1.05);
  transform: scale(1.08);
}

.client-card:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-card);
  transform: translateY(-2px);
}

/* --- About Preview Section --- */
.about-preview {
  padding: var(--section-padding) 0;
  background-color: #fff;
}

.about-preview-inner {
  display: flex;
  gap: 0;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0,0,0,0.08);
}

.about-preview-left {
  flex: 0 0 35%;
  background-color: var(--color-accent);
  color: #fff;
  padding: 48px 40px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.about-preview-left h3 {
  font-size: 28px;
  font-weight: var(--font-bold);
  margin-bottom: 20px;
  color: #fff;
}

.about-preview-left p {
  font-size: 15px;
  line-height: 1.8;
  margin-bottom: 16px;
  color: rgba(255,255,255,0.9);
}

.about-preview-left .btn-outline {
  display: inline-block;
  padding: 12px 32px;
  border: 2px solid rgba(255,255,255,0.6);
  color: #fff;
  text-decoration: none;
  border-radius: 0 0 6px 6px;
  font-size: 15px;
  font-weight: var(--font-medium);
  transition: all var(--transition);
  margin-top: 16px;
  align-self: flex-start;
}

.about-preview-left .btn-outline:hover {
  background-color: rgba(255,255,255,0.15);
  border-color: #fff;
}

.about-preview-right {
  flex: 1;
  background-color: #fff;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
}

.about-stat-item {
  padding: 40px 24px;
  text-align: center;
  border-right: 1px solid #f0f0f0;
  border-bottom: 1px solid #f0f0f0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
}

.about-stat-item:nth-child(4n) {
  border-right: none;
}

.about-stat-item:nth-child(n+5) {
  border-bottom: none;
}

.about-stat-item:hover {
  background-color: var(--color-light-blue);
}

.about-stat-number {
  font-size: 36px;
  font-weight: var(--font-bold);
  color: var(--color-accent);
  line-height: 1;
  margin-bottom: 12px;
  letter-spacing: -1px;
}

.about-stat-label {
  font-size: 14px;
  color: var(--color-text-gray);
  font-weight: var(--font-medium);
}

/* --- Footer --- */
.site-footer {
  background-color: var(--color-primary);
  color: var(--color-text-muted);
  padding: 64px 0 0;
}

.footer-inner {
  display: grid;
  grid-template-columns: 2fr 1fr 2fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.footer-brand h3 {
  font-size: 22px;
  font-weight: var(--font-bold);
  color: #fff;
  margin-bottom: 16px;
  letter-spacing: 1px;
}

.footer-brand p {
  font-size: 14px;
  line-height: 1.8;
  margin-bottom: 6px;
}

.footer-col h4 {
  font-size: 14px;
  font-weight: var(--font-bold);
  color: #fff;
  margin-bottom: 20px;
  letter-spacing: 0.5px;
}

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

.footer-col ul li a {
  font-size: 14px;
  color: var(--color-text-muted);
  transition: color var(--transition);
}

.footer-col ul li a:hover {
  color: #fff;
}

.footer-solutions-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px 24px;
}

.footer-solutions-grid a {
  font-size: 14px;
  color: var(--color-text-muted);
  transition: color var(--transition);
  text-decoration: none;
}

.footer-solutions-grid-3col {
  grid-template-columns: 1fr 1fr 1fr;
}

.footer-solutions-grid a:hover {
  color: #fff;
}

.footer-bottom {
  padding: 24px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  color: rgba(255,255,255,0.3);
}

.footer-bottom a {
  color: rgba(255,255,255,0.3);
  transition: color var(--transition);
}

.footer-bottom a:hover {
  color: rgba(255,255,255,0.6);
}

/* --- Floating Sidebar --- */
.floating-sidebar {
  position: fixed;
  right: 24px;
  bottom: 120px;
  top: auto;
  transform: none;
  z-index: 999;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.floating-item {
  width: 48px;
  height: 48px;
  background-color: var(--color-bg-white);
  border-radius: 12px;
  box-shadow: 0 4px 16px rgba(0,0,0,0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition);
  position: relative;
  border: 1px solid var(--color-border);
}

.floating-item:hover {
  box-shadow: 0 8px 24px rgba(0,0,0,0.15);
  border-color: var(--color-accent);
  transform: scale(1.05);
}

.floating-item svg {
  width: 22px;
  height: 22px;
  color: var(--color-text-gray);
  transition: color var(--transition);
}

.floating-item:hover svg {
  color: var(--color-accent);
}

.floating-tooltip {
  position: absolute;
  right: 60px;
  top: 50%;
  transform: translateY(-50%);
  background-color: var(--color-bg-white);
  border-radius: 12px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.15);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition);
  pointer-events: none;
}

.floating-item:hover .floating-tooltip {
  opacity: 1;
  visibility: visible;
  right: 58px;
}

.floating-tooltip-qr {
  width: 180px;
  text-align: center;
  padding: 20px;
}

.floating-tooltip-qr .qr-placeholder {
  width: 120px;
  height: 120px;
  margin: 0 auto 12px;
  border-radius: 8px;
  display: block;
  object-fit: cover;
}

.floating-tooltip-qr p {
  font-size: 12px;
  color: var(--color-text-gray);
  font-weight: var(--font-medium);
}

.floating-tooltip-text {
  padding: 10px 20px;
  font-size: 13px;
  color: var(--color-text-dark);
  font-weight: var(--font-medium);
  white-space: nowrap;
}

/* --- Scroll Animations --- */
.scroll-animate {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.scroll-animate.visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- Subpage Header --- */
.subpage-header {
  background: #0f1b2d;
  padding: 140px 0 80px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.subpage-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: url('/images/topbg.jpg');
  background-size: cover;
  background-position: center;
  opacity: 0.35;
  z-index: 0;
}

.subpage-header::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(15,27,45,0.6) 0%, rgba(26,58,92,0.4) 100%);
  z-index: 0;
}

.subpage-header .container {
  position: relative;
  z-index: 1;
}

.subpage-header h1 {
  font-size: 44px;
  font-weight: var(--font-bold);
  color: #fff;
  margin-bottom: 16px;
  letter-spacing: -1px;
}

.subpage-header p {
  font-size: 18px;
  color: var(--color-text-muted);
  font-weight: var(--font-light);
  max-width: 600px;
  margin: 0 auto;
}

/* --- Subpage Content --- */
.subpage-content {
  padding: var(--section-padding) 0;
}

/* --- Service Detail Page --- */
.service-intro {
  padding: 80px 0;
}



.service-intro-inner {
  display: flex;
  align-items: center;
  gap: 80px;
}

.service-intro-text {
  flex: 1;
}

.service-intro-text h2 {
  font-size: 32px;
  font-weight: var(--font-bold);
  color: var(--color-text-dark);
  margin-bottom: 12px;
  letter-spacing: -0.5px;
}

.service-intro-text .divider {
  width: 40px;
  height: 3px;
  background-color: var(--color-accent);
  border-radius: 2px;
  margin-bottom: 24px;
}

.service-intro-text p {
  font-size: 15px;
  color: var(--color-text-gray);
  line-height: 1.9;
  margin-bottom: 16px;
}

.service-intro-image {
  flex: 1;
  border-radius: var(--card-radius);
  overflow: hidden;
  min-height: 300px;
  border: 1px solid var(--color-border);
}

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

.service-features {
  padding: 80px 0;
  background-color: var(--color-bg-gray);
}

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

.feature-card {
  background-color: var(--color-bg-white);
  border-radius: var(--card-radius);
  padding: var(--card-padding);
  box-shadow: var(--shadow-card);
  transition: all var(--transition);
  border: 1px solid var(--color-border);
}

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

.feature-card-icon {
  width: 48px;
  height: 48px;
  background-color: var(--color-light-blue);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  color: var(--color-accent);
  transition: all var(--transition);
}

.feature-card:hover .feature-card-icon {
  background-color: var(--color-accent);
  color: #fff;
}

.feature-card h3 {
  font-size: 18px;
  font-weight: var(--font-bold);
  color: var(--color-text-dark);
  margin-bottom: 12px;
}

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

/* --- Solutions Page --- */
.solutions-list {
  padding: 80px 0;
}

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

.solution-card {
  background-color: var(--color-bg-white);
  border-radius: var(--card-radius);
  padding: var(--card-padding);
  box-shadow: var(--shadow-card);
  transition: all var(--transition);
  border: 1px solid var(--color-border);
  cursor: pointer;
  display: block;
}

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

.solution-card h3 {
  font-size: 20px;
  font-weight: var(--font-bold);
  color: var(--color-text-dark);
  margin-bottom: 14px;
}

.solution-card p {
  font-size: 14px;
  color: var(--color-text-gray);
  line-height: 1.7;
  margin-bottom: 20px;
}

.solution-card-link {
  font-size: 14px;
  color: var(--color-accent);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: var(--font-medium);
  transition: gap var(--transition);
}

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

/* --- About Page --- */
.about-content {
  padding: 80px 0;
}

.about-module {
  margin-bottom: 80px;
  text-align: center;
}

.about-module:last-child {
  margin-bottom: 0;
}

.about-module-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 20px;
  background: linear-gradient(135deg, var(--color-dark) 0%, var(--color-accent) 100%);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  padding: 16px;
}

.about-module-icon svg {
  width: 32px;
  height: 32px;
  stroke-width: 1.5;
}

.about-module h2 {
  font-size: 28px;
  font-weight: var(--font-bold);
  color: var(--color-text-dark);
  margin-bottom: 20px;
  letter-spacing: -0.3px;
}

.about-module p {
  font-size: 15px;
  color: var(--color-text-gray);
  line-height: 2;
  margin-bottom: 12px;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

/* about-grid */
.about-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 40px;
}

.about-grid-item {
  background: var(--color-bg-gray);
  border-radius: var(--card-radius);
  padding: 32px 24px;
  text-align: center;
  transition: all var(--transition);
  border: 1px solid var(--color-border);
}

.about-grid-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--color-accent);
}

.about-grid-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 16px;
  background-color: var(--color-light-blue);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
  padding: 12px;
}

.about-grid-icon svg {
  width: 24px;
  height: 24px;
  stroke-width: 1.5;
}

.about-grid-item h4 {
  font-size: 17px;
  font-weight: var(--font-bold);
  color: var(--color-text-dark);
  margin-bottom: 10px;
}

.about-grid-item p {
  font-size: 14px;
  color: var(--color-text-gray);
  line-height: 1.7;
  margin-bottom: 0;
  max-width: none;
}

/* ========================================
   RESPONSIVE
   ======================================== */
@media (max-width: 768px) {
  :root {
    --section-padding: 60px;
    --card-padding: 24px;
  }

  .menu-toggle {
    display: flex;
  }

  .nav-list {
    display: none;
  }

  .hero-slide-title {
    font-size: 32px;
  }

  .hero-slide-desc {
    font-size: 16px;
  }

  .hero-arrow {
    width: 40px;
    height: 40px;
  }

  .hero-arrow-left {
    left: 16px;
  }

  .hero-arrow-right {
    right: 16px;
  }

  .hero-slide-badge {
    font-size: 11px;
    padding: 4px 14px;
  }

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

  .clients-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
  }

  .solutions-slim-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }

  .solutions-slim-header h3 {
    font-size: 15px;
  }

  .solutions-slim-item {
    padding: 14px 14px;
  }

  .business-section {
    padding: 50px 0;
  }

  .client-card {
    min-height: 76px;
    padding: 20px 12px;
  }

  .client-card .client-logo {
    max-height: 56px;
  }

  .clients-tab {
    flex: 1;
    text-align: center;
    padding: 10px 16px;
    font-size: 13px;
  }

  .about-preview-inner {
    flex-direction: column;
  }

  .about-preview-left {
    flex: none;
    padding: 40px 32px;
  }

  .about-preview-left h3 {
    font-size: 24px;
  }

  .about-preview-right {
    grid-template-columns: repeat(4, 1fr);
  }

  .about-stat-item {
    padding: 32px 20px;
  }

  .about-stat-number {
    font-size: 32px;
  }

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

  .footer-bottom {
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }

  .floating-sidebar {
    right: 16px;
    bottom: 120px;
    top: auto;
    transform: none;
  }

  .floating-item {
    width: 42px;
    height: 42px;
  }

  .floating-item svg {
    width: 20px;
    height: 20px;
  }

  .service-intro-inner {
    flex-direction: column;
    gap: 40px;
  }

  .service-intro-text h2 {
    font-size: 26px;
  }

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

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

  .section-title {
    font-size: 26px;
  }

  .subpage-header h1 {
    font-size: 32px;
  }

  .subpage-header p {
    font-size: 16px;
  }

  .about-module h2 {
    font-size: 22px;
  }

  .about-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }
}

@media (max-width: 480px) {
  :root {
    --section-padding: 40px;
  }

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

  .hero-slide-title {
    font-size: 26px;
    letter-spacing: -0.5px;
  }

  .hero-slide-desc {
    font-size: 14px;
  }

  .hero-arrow {
    display: none;
  }

  .clients-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
  }

  .solutions-slim-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
  }

  .solutions-slim-header h3 {
    font-size: 14px;
  }

  .slim-name {
    font-size: 12px;
  }

  .business-section {
    padding: 40px 0;
  }

  .slim-desc {
    display: none;
  }

  .client-card {
    min-height: 64px;
    padding: 16px 10px;
  }

  .client-card .client-logo {
    max-height: 32px;
  }

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

  .about-preview-left {
    padding: 32px 24px;
  }

  .about-preview-left h3 {
    font-size: 22px;
  }

  .about-stat-item {
    padding: 24px 16px;
  }

  .about-stat-number {
    font-size: 28px;
  }

  .about-stat-label {
    font-size: 12px;
  }

  .hero-actions {
    flex-direction: column;
    align-items: center;
  }

  .stat-number {
    font-size: 32px;
  }

  .business-card-title {
    font-size: 20px;
  }

  .section-title {
    font-size: 22px;
  }
}

/* 滚动入场动画 */
.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ========== 解决方案详情页通用样式 ========== */

/* 方案概要 */
.sol-summary {
  padding: 80px 0;
  background: #fff;
}
.sol-summary-inner {
  display: flex;
  gap: 60px;
  align-items: center;
}
.sol-summary-text {
  flex: 1;
  min-width: 0;
}
.sol-summary-text h2 {
  font-size: 28px;
  font-weight: 700;
  color: #0f1b2d;
  margin-bottom: 16px;
}
.sol-summary-text p {
  font-size: 16px;
  line-height: 1.8;
  color: #4a5568;
}
.sol-summary-image {
  flex: 1;
  border-radius: 12px;
  overflow: hidden;
  aspect-ratio: 1.6 / 1;
  border: 1px solid #e5e7eb;
}
.sol-summary-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.sol-back-link {
  text-align: left;
  margin-bottom: 24px;
}
.sol-back-link a {
  display: inline-block;
  padding: 10px 28px;
  font-size: 15px;
  color: var(--color-primary, #1a5fb4);
  background: #f0f4f9;
  border-radius: 6px;
  transition: all 0.3s ease;
  text-decoration: none;
  font-weight: 500;
}
.sol-back-link a:hover {
  background: var(--color-primary, #1a5fb4);
  color: #fff;
}

/* 需求痛点 + 实施方案 双栏 */
.sol-dual {
  padding: 60px 0;
  background: #f3f4f6;
}
.sol-dual-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}
.sol-card {
  background: #fff;
  border-radius: 12px;
  padding: 40px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.06);
}
.sol-card-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
}
.sol-card-header .card-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.sol-card-header .card-icon.pain {
  background: #fef2f2;
  color: #dc2626;
}
.sol-card-header .card-icon.plan {
  background: #eff6ff;
  color: #1a5fb4;
}
.sol-card-header .card-icon svg {
  width: 24px;
  height: 24px;
}
.sol-card-header h3 {
  font-size: 22px;
  font-weight: 700;
  color: #0f1b2d;
}
.sol-card p.card-desc {
  font-size: 14px;
  line-height: 1.7;
  color: #6b7280;
  margin-bottom: 20px;
}
.sol-card ul {
  list-style: none;
  padding: 0;
  margin: 0;
}
.sol-card ul li {
  position: relative;
  padding-left: 20px;
  font-size: 15px;
  line-height: 1.7;
  color: #374151;
  margin-bottom: 14px;
}
.sol-card ul li:last-child {
  margin-bottom: 0;
}
.sol-card ul li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 9px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
}
.sol-card.pain-card ul li::before {
  background: #dc2626;
}
.sol-card.plan-card ul li::before {
  background: #1a5fb4;
}
.sol-card ul li strong {
  font-weight: 600;
  color: #0f1b2d;
}

/* 核心亮点 */
.sol-highlights {
  padding: 80px 0;
  background: #fff;
}
.sol-highlights .section-title {
  margin-bottom: 48px;
}
.highlights-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.highlight-item {
  background: #f8f9fb;
  border-radius: 12px;
  padding: 32px 24px;
  text-align: center;
  border: 1px solid #eef0f3;
  transition: all 0.3s ease;
}
.highlight-item:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0,0,0,0.08);
  border-color: #1a5fb4;
}
.highlight-item .hl-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 16px;
  background: #e8f0fe;
  color: #1a5fb4;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
}
.highlight-item h4 {
  font-size: 16px;
  font-weight: 600;
  color: #0f1b2d;
  margin-bottom: 0;
}

@media (max-width: 768px) {
  .sol-summary-inner {
    flex-direction: column;
    gap: 30px;
  }
  .sol-summary-image {
    width: 100%;
    height: 240px;
  }
  .sol-dual-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .highlights-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }
  .sol-card {
    padding: 28px;
  }
}
@media (max-width: 480px) {
  .highlights-grid {
    grid-template-columns: 1fr;
  }
  .sol-summary-text h2 {
    font-size: 22px;
  }
  .sol-card-header h3 {
    font-size: 18px;
  }
}