/* ===== 全局重置 ===== */
* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: #333;
  line-height: 1.6;
}

.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* ===== 导航栏 ===== */
.navbar {
  position: fixed; top: 0; left: 0; right: 0;
  background: rgba(255,255,255,0.97);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(0,0,0,0.06);
  z-index: 1000;
}

.navbar .container {
  width: 100%;
}

.navbar-inner {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  padding: 12px 20px 10px;
}

.logo {
  display: flex; align-items: center; gap: 10px;
  font-size: 28px; font-weight: 700; color: #1a2a4a;
  text-decoration: none;
  margin-bottom: 6px;
}

.logo-icon {
  color: #2563eb; font-size: 30px;
}

.nav-menu { display: flex; gap: 12px; justify-content: center; }

.nav-menu a {
  text-decoration: none; color: #555; font-size: 16px; font-weight: 500;
  padding: 6px 18px; border-radius: 6px;
  transition: all 0.3s;
  position: relative;
}

.nav-menu a:hover, .nav-menu a.active {
  background: #eef2ff; color: #2563eb;
}

.nav-menu a.active::after {
  content: '';
  position: absolute; bottom: -1px; left: 50%; transform: translateX(-50%);
  width: 22px; height: 3px;
  background: #2563eb;
  border-radius: 2px;
}

.hamburger { display: none; flex-direction: column; gap: 5px; cursor: pointer; }

.hamburger span { width: 26px; height: 3px; background: #333; border-radius: 2px; transition: 0.3s; }

/* ===== Hero / 滑动Banner ===== */
.hero { margin-top: 88px; position: relative; overflow: hidden; }

.slider-container { position: relative; width: 100%; height: 85vh; min-height: 500px; max-height: 750px; }

.slider { display: flex; width: 100%; height: 100%; transition: transform 0.7s ease-in-out; }

.slide {
  min-width: 100%; height: 100%;
  display: flex; align-items: center; justify-content: center;
  background-size: cover; background-position: center;
  position: relative;
}

.slide-content {
  text-align: center; color: #fff; padding: 40px 20px;
  max-width: 800px;
  animation: fadeUp 0.8s ease;
}

.slide-content h1 { font-size: 48px; font-weight: 800; margin-bottom: 16px; letter-spacing: 1px; }
.slide-content p { font-size: 18px; opacity: 0.9; margin-bottom: 32px; line-height: 1.8; }

/* 主slide：左文右品牌Logo云 */
.slide-content-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  max-width: 1100px;
  text-align: left;
  padding: 60px 20px;
}

.slide-left {}

.slide-badge {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(37,99,235,0.2);
  border: 1px solid rgba(37,99,235,0.4);
  border-radius: 50px;
  font-size: 13px;
  color: #93c5fd;
  margin-bottom: 20px;
  letter-spacing: 1px;
}

.slide-left h1 {
  font-size: 44px;
  line-height: 1.2;
  margin-bottom: 20px;
}

.slide-left p {
  font-size: 16px;
  opacity: 0.85;
  margin-bottom: 32px;
  line-height: 1.8;
}

.slide-left .slide-btns {
  justify-content: flex-start;
}

/* 品牌Logo云 */
.brand-cloud {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 20px;
  padding: 30px;
}

.brand-cloud-title {
  text-align: center;
  font-size: 14px;
  color: rgba(255,255,255,0.5);
  letter-spacing: 2px;
  margin-bottom: 24px;
  text-transform: uppercase;
}

.brand-cloud-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.brand-logo {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 16px 8px;
  background: rgba(255,255,255,0.05);
  border-radius: 12px;
  transition: 0.3s;
}

.brand-logo:hover {
  background: rgba(255,255,255,0.12);
  transform: translateY(-2px);
}

.brand-logo i {
  font-size: 28px;
  color: rgba(255,255,255,0.6);
}

.brand-logo span {
  font-size: 13px;
  color: rgba(255,255,255,0.6);
}

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

.btn {
  display: inline-block; padding: 14px 36px; border-radius: 8px;
  font-size: 16px; font-weight: 600; text-decoration: none;
  transition: all 0.3s; cursor: pointer; border: none;
}

.btn-primary { background: #2563eb; color: #fff; }
.btn-primary:hover { background: #1d4ed8; transform: translateY(-2px); box-shadow: 0 8px 24px rgba(37,99,235,0.3); }

.btn-outline { background: transparent; color: #fff; border: 2px solid rgba(255,255,255,0.8); }
.btn-outline:hover { background: rgba(255,255,255,0.15); border-color: #fff; }

/* 箭头 */
.slider-arrow {
  position: absolute; top: 50%; transform: translateY(-50%);
  background: rgba(255,255,255,0.15); color: #fff; border: none;
  width: 50px; height: 50px; border-radius: 50%;
  font-size: 22px; cursor: pointer; transition: 0.3s;
  backdrop-filter: blur(4px);
}
.slider-arrow:hover { background: rgba(255,255,255,0.3); }
.slider-arrow.prev { left: 20px; }
.slider-arrow.next { right: 20px; }

/* 圆点 */
.slider-dots {
  position: absolute; bottom: 30px; left: 50%; transform: translateX(-50%);
  display: flex; gap: 12px;
}
.slider-dots span {
  width: 12px; height: 12px; border-radius: 50%;
  background: rgba(255,255,255,0.4); cursor: pointer; transition: 0.3s;
}
.slider-dots span.active { background: #fff; width: 32px; border-radius: 6px; }

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ===== 服务保障条 ===== */
.guarantees {
  padding: 50px 0;
  background: #f8faff;
  border-bottom: 1px solid #eef2ff;
}

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

.guarantee-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px 24px;
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 2px 12px rgba(0,0,0,0.04);
  transition: 0.3s;
}

.guarantee-item:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 20px rgba(37,99,235,0.1);
}

.guarantee-icon {
  width: 48px;
  height: 48px;
  min-width: 48px;
  background: linear-gradient(135deg, #eef2ff, #dbeafe);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.guarantee-icon i {
  font-size: 20px;
  color: #2563eb;
}

.guarantee-text h4 {
  font-size: 15px;
  font-weight: 600;
  color: #1a2a4a;
  margin-bottom: 2px;
}

.guarantee-text p {
  font-size: 13px;
  color: #888;
  line-height: 1.4;
}

/* ===== 数据概览 ===== */
.stats { background: #1a2a4a; padding: 80px 0; }

.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 40px; text-align: center; }

.stat-item {
  background: rgba(255,255,255,0.03);
  border-radius: 16px;
  padding: 40px 24px;
  border: 1px solid rgba(255,255,255,0.06);
  transition: 0.3s;
}
.stat-item:hover {
  background: rgba(255,255,255,0.06);
  transform: translateY(-4px);
}

.stat-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 20px;
  background: linear-gradient(135deg, rgba(37,99,235,0.2), rgba(96,165,250,0.2));
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.stat-icon i {
  font-size: 28px;
  color: #60a5fa;
}

.stat-item h3 {
  font-size: 20px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 12px;
}

.stat-item p {
  color: rgba(255,255,255,0.6);
  font-size: 14px;
  line-height: 1.7;
}

/* ===== Section 通用 ===== */
.section { padding: 100px 0; }
.section:nth-child(even) { background: #f8faff; }

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

.section-header h2 { font-size: 36px; font-weight: 700; color: #1a2a4a; }
.highlight { color: #2563eb; }

.divider {
  width: 60px; height: 4px; background: linear-gradient(90deg, #2563eb, #60a5fa);
  margin: 16px auto; border-radius: 2px;
}

.section-header p { color: #666; font-size: 17px; }

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

.about-text p { font-size: 16px; color: #555; margin-bottom: 16px; line-height: 1.8; }

.about-features { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 24px; }

.about-feature { display: flex; align-items: center; gap: 10px; font-size: 15px; color: #444; }
.about-feature i { color: #2563eb; font-size: 18px; }

.about-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 16px;
  display: block;
}

.about-media {
  background: #f0f4ff; border-radius: 16px;
  min-height: 320px; display: flex; align-items: center; justify-content: center;
  overflow: hidden;
}

.media-placeholder { text-align: center; color: #8899cc; padding: 40px; }
.media-placeholder i { font-size: 64px; margin-bottom: 16px; opacity: 0.5; }
.media-placeholder p { font-size: 18px; font-weight: 600; margin-bottom: 8px; }
.media-placeholder span { font-size: 13px; opacity: 0.6; }

/* ===== 业务范围 ===== */
.business-chart-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  margin-bottom: 60px;
  background: #fff;
  border-radius: 20px;
  padding: 40px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.04);
  border: 1px solid #f0f0f0;
}

.business-pie-chart {
  width: 100%;
  height: 350px;
}

.business-pie-info h3 {
  font-size: 24px;
  color: #1a2a4a;
  margin-bottom: 16px;
}

.business-pie-info p {
  color: #666;
  line-height: 1.8;
  margin-bottom: 24px;
}

.pie-legend {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.pie-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: #555;
}

.pie-item span {
  width: 12px;
  height: 12px;
  border-radius: 3px;
}

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

.business-card { border-radius: 16px; overflow: hidden; box-shadow: 0 4px 20px rgba(0,0,0,0.06); transition: 0.3s; background: #fff; }
.business-card:hover { transform: translateY(-8px); box-shadow: 0 12px 40px rgba(0,0,0,0.1); }

.business-img {
  height: 180px; display: flex; align-items: center; justify-content: center;
}
.business-img i { font-size: 56px; color: #fff; opacity: 0.9; }

.business-info { padding: 20px; }
.business-info h3 { font-size: 18px; margin-bottom: 8px; color: #1a2a4a; }
.business-info p { font-size: 14px; color: #666; line-height: 1.6; margin-bottom: 12px; }

.business-bar {
  width: 100%;
  height: 6px;
  background: #f0f4ff;
  border-radius: 3px;
  overflow: hidden;
  position: relative;
}

.business-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, #2563eb, #60a5fa);
  border-radius: 3px;
  transition: width 1s ease;
}

.business-bar span {
  position: absolute;
  right: 0;
  top: -20px;
  font-size: 12px;
  color: #2563eb;
  font-weight: 600;
}

/* ===== 核心优势 ===== */
.advantage-radar {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 60px;
  align-items: center;
  margin-bottom: 60px;
  background: #fff;
  border-radius: 20px;
  padding: 40px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.04);
  border: 1px solid #f0f0f0;
}

.radar-chart {
  width: 100%;
  height: 400px;
}

.radar-legend h3 {
  font-size: 24px;
  color: #1a2a4a;
  margin-bottom: 24px;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
  font-size: 16px;
}

.legend-color {
  width: 16px;
  height: 16px;
  border-radius: 4px;
}

.legend-item strong {
  margin-left: auto;
  color: #1a2a4a;
  font-size: 18px;
}

.radar-desc {
  margin-top: 24px;
  padding-top: 24px;
  border-top: 1px solid #f0f0f0;
  color: #888;
  font-size: 14px;
  line-height: 1.7;
}

.advantages-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }

.advantage-card { background: #fff; padding: 36px 28px; border-radius: 16px; box-shadow: 0 4px 20px rgba(0,0,0,0.04); text-align: center; transition: 0.3s; border: 1px solid #f0f0f0; }
.advantage-card:hover { box-shadow: 0 8px 30px rgba(37,99,235,0.08); border-color: #dbeafe; }

.advantage-icon {
  width: 72px; height: 72px; margin: 0 auto 20px;
  background: linear-gradient(135deg, #eef2ff, #dbeafe); border-radius: 20px;
  display: flex; align-items: center; justify-content: center;
}
.advantage-icon i { font-size: 32px; color: #2563eb; }

.advantage-card h3 { font-size: 20px; margin-bottom: 12px; color: #1a2a4a; }
.advantage-card p { font-size: 15px; color: #666; line-height: 1.7; margin-bottom: 20px; }

.advantage-chart {
  width: 120px;
  height: 120px;
  margin: 0 auto;
}

/* ===== 运营案例 ===== */
.cases-overview {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 60px;
  align-items: center;
  margin-bottom: 60px;
  background: #fff;
  border-radius: 20px;
  padding: 40px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.04);
  border: 1px solid #f0f0f0;
}

.overview-chart {
  width: 100%;
  height: 350px;
}

.overview-text h3 {
  font-size: 24px;
  color: #1a2a4a;
  margin-bottom: 16px;
}

.overview-text p {
  color: #666;
  line-height: 1.8;
  margin-bottom: 30px;
}

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

.metric {
  text-align: center;
  padding: 20px;
  background: #f8faff;
  border-radius: 12px;
}

.metric-value {
  display: block;
  font-size: 28px;
  font-weight: 800;
  color: #2563eb;
  margin-bottom: 4px;
}

.metric-label {
  font-size: 13px;
  color: #888;
}

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

.case-card { border-radius: 16px; overflow: hidden; box-shadow: 0 4px 20px rgba(0,0,0,0.06); background: #fff; transition: 0.3s; }
.case-card:hover { transform: translateY(-6px); box-shadow: 0 12px 40px rgba(0,0,0,0.1); }

.case-chart {
  width: 100%;
  height: 160px;
  background: linear-gradient(135deg, #f8faff, #fff);
}

.case-info { padding: 24px; }

.case-tag {
  display: inline-block; padding: 4px 12px; border-radius: 4px;
  background: #eef2ff; color: #2563eb; font-size: 12px; font-weight: 600;
  margin-bottom: 10px;
}

.case-info h3 { font-size: 18px; margin-bottom: 8px; color: #1a2a4a; }
.case-info p { font-size: 14px; color: #666; margin-bottom: 16px; line-height: 1.6; }

.case-stats { display: flex; gap: 24px; }
.case-stats span { font-size: 13px; color: #888; }
.case-stats strong { color: #2563eb; }

/* ===== 合作平台 ===== */
.partners { padding: 80px 0; background: #fff; }

.platform-chart-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  background: #f8faff;
  border-radius: 20px;
  padding: 40px;
}

.platform-chart {
  width: 100%;
  height: 350px;
}

.platform-info h3 {
  font-size: 24px;
  color: #1a2a4a;
  margin-bottom: 16px;
}

.platform-info p {
  color: #666;
  line-height: 1.8;
  margin-bottom: 30px;
}

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

.platform-metric {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px;
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.04);
}

.platform-metric i {
  font-size: 24px;
  color: #2563eb;
}

.platform-metric span {
  font-size: 14px;
  color: #666;
}

.platform-metric strong {
  margin-left: auto;
  font-size: 20px;
  color: #1a2a4a;
}

/* 境外布局 */
.global-map {
  margin-top: 60px;
  background: linear-gradient(135deg, #1a2a4a, #0f172a);
  border-radius: 20px;
  padding: 50px 40px;
  text-align: center;
  color: #fff;
}

.global-map h3 {
  font-size: 28px;
  margin-bottom: 16px;
  color: #fff;
}

.global-map p {
  color: rgba(255,255,255,0.7);
  font-size: 16px;
  line-height: 1.8;
  margin-bottom: 30px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.country-tags {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.country-tag {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 50px;
  font-size: 15px;
  color: rgba(255,255,255,0.7);
  transition: 0.3s;
}

.country-tag.active {
  background: rgba(37,99,235,0.3);
  border-color: #2563eb;
  color: #fff;
}

.country-tag i {
  color: #60a5fa;
}

.partner-logos {
  display: flex; justify-content: center; align-items: center;
  gap: 48px; flex-wrap: wrap;
  margin-top: 60px;
}

.partner-logo {
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  font-size: 14px; color: #666; cursor: default;
}
.partner-logo i { font-size: 42px; color: #8899aa; transition: 0.3s; }
.partner-logo:hover i { color: #2563eb; transform: scale(1.1); }

/* ===== 联系我们 ===== */
.contact { background: #f8faff; }

.contact-content { display: grid; grid-template-columns: 1fr 1.5fr; gap: 60px; }

.contact-info { display: flex; flex-direction: column; gap: 30px; }

.contact-item { display: flex; align-items: flex-start; gap: 16px; }
.contact-item i { font-size: 24px; color: #2563eb; margin-top: 4px; }
.contact-item h4 { font-size: 16px; color: #1a2a4a; margin-bottom: 4px; }
.contact-item p { font-size: 15px; color: #666; }

.contact-form { display: flex; flex-direction: column; gap: 16px; }
.contact-form input, .contact-form textarea {
  padding: 14px 16px; border: 1px solid #d1d5db; border-radius: 8px;
  font-size: 15px; transition: 0.3s; font-family: inherit;
}
.contact-form input:focus, .contact-form textarea:focus {
  outline: none; border-color: #2563eb; box-shadow: 0 0 0 3px rgba(37,99,235,0.1);
}
.contact-form textarea { resize: vertical; }
.contact-form button { align-self: flex-start; }

/* ===== 页脚 ===== */
.footer { background: #0f172a; color: #fff; padding: 60px 0 0; }

.footer-content { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 60px; padding-bottom: 40px; }

.footer-brand img { height: 52px; margin-bottom: 14px; }
.footer-brand p { color: #94a3b8; font-size: 15px; margin-bottom: 16px; }

.footer-links h4 { font-size: 16px; margin-bottom: 16px; color: #e2e8f0; }
.footer-links a { display: block; color: #94a3b8; text-decoration: none; margin-bottom: 10px; font-size: 14px; transition: 0.3s; }
.footer-links a:hover { color: #60a5fa; }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 20px 0; text-align: center;
  color: #94a3b8; font-size: 14px;
}

.footer-bottom a {
  color: #cbd5e1;
  text-decoration: none;
  transition: 0.3s;
}

.footer-bottom a:hover {
  color: #60a5fa;
  text-decoration: underline;
}

/* ===== 响应式 ===== */
@media (max-width: 992px) {
  .about-content { grid-template-columns: 1fr; gap: 40px; }
  .advantage-radar { grid-template-columns: 1fr; }
  .radar-chart { height: 300px; }
  .business-chart-container { grid-template-columns: 1fr; }
  .business-pie-chart { height: 280px; }
  .cases-overview { grid-template-columns: 1fr; }
  .overview-chart { height: 280px; }
  .platform-chart-container { grid-template-columns: 1fr; }
  .platform-chart { height: 280px; }
  .business-grid { grid-template-columns: repeat(2, 1fr); }
  .advantages-grid { grid-template-columns: repeat(2, 1fr); }
  .cases-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-content { grid-template-columns: 1fr; }
  .footer-content { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .guarantees-grid { grid-template-columns: repeat(2, 1fr); }

  .navbar-inner {
    padding: 8px 20px 6px;
  }

  .hamburger {
    display: flex;
    position: absolute; top: 24px; right: 20px;
  }

  .nav-menu {
    position: absolute; top: 100%; left: 0; right: 0;
    background: #fff; flex-direction: column; padding: 20px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    display: none;
  }
  .nav-menu.open { display: flex; }

  .slider-container { height: auto; min-height: auto; padding: 40px 0; }
  .slide-content h1 { font-size: 32px; }
  .slide-content p { font-size: 16px; }

  .slide-content-split {
    grid-template-columns: 1fr;
    gap: 40px;
    text-align: center;
    padding: 20px;
  }
  .slide-left .slide-btns { justify-content: center; }
  .slide-left h1 { font-size: 32px; }
  .brand-cloud-grid { grid-template-columns: repeat(4, 1fr); gap: 10px; }
  .brand-logo { padding: 12px 4px; }
  .slide {
    min-height: auto;
    padding: 20px 0;
  }

  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; }
  .stat-number { font-size: 36px; }

  .section { padding: 60px 0; }
  .section-header h2 { font-size: 28px; }

  .business-grid { grid-template-columns: 1fr; }
  .advantages-grid { grid-template-columns: 1fr; }
  .cases-grid { grid-template-columns: 1fr; }
  .footer-content { grid-template-columns: 1fr; gap: 30px; }

  .slider-arrow { width: 40px; height: 40px; font-size: 18px; }
  .slider-arrow.prev { left: 10px; }
  .slider-arrow.next { right: 10px; }

  .overview-metrics { grid-template-columns: 1fr; }
  .platform-metrics { grid-template-columns: 1fr; }
  .pie-legend { grid-template-columns: 1fr; }
}