:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --nav-bg: #0f172a;
  --text-main: #111827;
  --text-sub: #6b7280;
  --bg-light: #f3f4f6;
  --card-bg: #ffffff;
  --border-color: #e5e7eb;
  --accent: #38bdf8;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei",
    "Helvetica Neue", Arial, sans-serif;
  color: var(--text-main);
  background-color: #ffffff;
}

a {
  color: inherit;
  text-decoration: none;
}

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

/* 顶部导航区域 */

.site-header {
  background: #ffffff;
  box-shadow: 0 1px 0 rgba(15, 23, 42, 0.06);
}

.top-bar {
  max-width: 1200px;
  margin: 0 auto;
  padding: 12px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo-area {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-mark {
  width: 40px;
  height: 40px;
  border-radius: 4px;
  background: linear-gradient(135deg, #2563eb, #38bdf8);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: #ffffff;
  letter-spacing: 1px;
  font-size: 16px;
}

.logo-text .logo-title {
  font-size: 18px;
  font-weight: 600;
}

.logo-text .logo-subtitle {
  font-size: 12px;
  color: var(--text-sub);
}

.main-nav {
  display: flex;
  gap: 24px;
  font-size: 14px;
}

.main-nav a {
  color: #000;
  padding: 0 4px;
  position: relative;
}

.main-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width 0.2s ease;
}

.main-nav a:hover::after {
  width: 100%;
}

/* 导航深色带 */

.site-header::after {
  content: "";
  display: block;
  width: 100%;
  height: 48px;
  background: var(--nav-bg);
}

.site-header .top-bar {
  position: relative;
  z-index: 2;
}

.site-header .top-bar::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -48px;
  height: 48px;
  background: var(--nav-bg);
  z-index: -1;
}

/* .site-header .main-nav a {
  color: #f5f7fb;
} */

/* Hero 区块 */

.hero {
  max-width: 1200px;
  margin: 0 auto;
  padding: 72px 20px 56px;
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  gap: 40px;
  align-items: center;
}

.hero-content h1 {
  font-size: 32px;
  margin: 0 0 16px;
}

.hero-content p {
  margin: 0 0 24px;
  color: var(--text-sub);
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 22px;
  border-radius: 999px;
  font-size: 14px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn.primary {
  background: var(--primary);
  color: #ffffff;
  border-color: var(--primary);
}

.btn.primary:hover {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
}

.btn.ghost {
  background: transparent;
  color: var(--primary);
  border-color: rgba(25, 27, 39, 0.2);
}

.btn.ghost:hover {
  border-color: var(--primary);
  background: rgba(39, 89, 165, 0.04);
}

.hero-visual {
  display: flex;
  justify-content: center;
}

.cloud-diagram {
  position: relative;
  width: 340px;
  height: 260px;
  background: #eff6ff;
  border-radius: 16px;
  box-shadow: 0 18px 40px rgba(37, 99, 235, 0.18);
  overflow: hidden;
}

.cloud {
  position: absolute;
  top: 32px;
  left: 50%;
  width: 150px;
  height: 80px;
  margin-left: -75px;
  background: linear-gradient(135deg, #5ca9ff, #89c5ff);
  border-radius: 50px;
  box-shadow: 0 14px 30px rgba(0, 121, 255, 0.35);
}

.cloud::before,
.cloud::after {
  content: "";
  position: absolute;
  background: inherit;
  border-radius: 50%;
}

.cloud::before {
  width: 70px;
  height: 70px;
  top: -30px;
  left: 5px;
}

.cloud::after {
  width: 60px;
  height: 60px;
  top: -26px;
  right: 0;
}

.device {
  position: absolute;
  background: #ffffff;
  border-radius: 4px;
  box-shadow: 0 8px 20px rgba(15, 23, 42, 0.15);
}

.device-laptop {
  bottom: 26px;
  left: 40px;
  width: 110px;
  height: 70px;
}

.device-desktop {
  bottom: 40px;
  right: 38px;
  width: 80px;
  height: 90px;
}

.device-tablet {
  bottom: 20px;
  left: 180px;
  width: 46px;
  height: 80px;
}

.device-phone {
  bottom: 24px;
  right: 140px;
  width: 28px;
  height: 54px;
}

.device::before {
  content: "";
  position: absolute;
  inset: 6px;
  background: linear-gradient(135deg, #0d5adf, #56c3ff);
  border-radius: 3px;
}

.cloud-lines {
  position: absolute;
  inset: 0;
  stroke: #52a2ff;
  stroke-width: 2;
  fill: none;
  opacity: 0.85;
}

/* 蓝色标题带 */

.page-banner {
  background: var(--primary);
  color: #ffffff;
  padding: 26px 20px;
  margin-top: 32px;
}

.page-banner-inner {
  max-width: 1200px;
  margin: 0 auto;
}

.page-banner h2 {
  margin: 0 0 6px;
  font-size: 22px;
}

.breadcrumb {
  font-size: 13px;
  opacity: 0.9;
}

.breadcrumb span {
  font-weight: 600;
}

/* 主体布局 */

.site-main {
  background: var(--bg-light);
  padding: 36px 0 0;
}

.layout {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px 40px;
  display: grid;
  grid-template-columns: minmax(0, 2.2fr) minmax(0, 1fr);
  gap: 24px;
}

.content {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.card {
  background: var(--card-bg);
  border-radius: 10px;
  box-shadow: 0 12px 30px rgba(15, 23, 42, 0.06);
  padding: 20px 22px 22px;
}

.card-title {
  margin: 0 0 10px;
  font-size: 20px;
}

.news-meta {
  font-size: 12px;
  color: var(--text-sub);
  margin-bottom: 14px;
}

.news-media {
  margin-bottom: 16px;
}

.news-image {
  width: 100%;
  height: 260px;
  border-radius: 10px;
  background-size: cover;
  background-position: center;
}

.news-image-cloud {
  background-image: linear-gradient(
      to bottom,
      rgba(255, 255, 255, 0.2),
      rgba(0, 0, 0, 0.25)
    ),
    url("https://images.pexels.com/photos/1181467/pexels-photo-1181467.jpeg");
}

.news-image-chip {
  background-image: linear-gradient(
      to bottom,
      rgba(0, 0, 0, 0.35),
      rgba(0, 0, 0, 0.5)
    ),
    url("https://images.pexels.com/photos/373543/pexels-photo-373543.jpeg");
}

.card-text {
  margin: 0 0 8px;
  color: var(--text-sub);
  line-height: 1.8;
  font-size: 14px;
}

.read-more {
  display: inline-flex;
  align-items: center;
  margin-top: 4px;
  font-size: 13px;
  color: var(--primary);
}

.read-more:hover {
  text-decoration: underline;
}

.about-card .card-title {
  border-left: 3px solid var(--primary);
  padding-left: 10px;
}

/* 侧边栏 */

.sidebar {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.side-block {
  background: #ffffff;
  color: var(--text-main);
  border-radius: 10px;
  padding: 16px 18px 12px;
  border: 1px solid rgba(148, 163, 184, 0.35);
  box-shadow: 0 10px 25px rgba(15, 23, 42, 0.05);
}

.side-block h4 {
  margin: 0 0 10px;
  font-size: 15px;
}

.side-block ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.side-block li {
  font-size: 13px;
  border-top: 1px solid rgba(148, 163, 184, 0.24);
  padding: 8px 0;
}

.side-block li:first-child {
  border-top: none;
}

.side-block a {
  color: var(--primary);
  opacity: 0.92;
}

.side-block a:hover {
  opacity: 1;
  text-decoration: underline;
}

/* 经营范围 */

.section {
  border-top: 1px solid var(--border-color);
  background: #ffffff;
}

.app-section {
  background: linear-gradient(180deg, #eef2ff, #ffffff);
}

.section-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 40px 20px 50px;
}

.section-title {
  margin: 0 0 10px;
  font-size: 22px;
}

.section-intro {
  margin: 0 0 24px;
  color: var(--text-sub);
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.service-card {
  padding: 16px 16px 18px;
  border-radius: 6px;
  border: 1px solid var(--border-color);
  background: linear-gradient(135deg, #ffffff, #f9fbff);
  font-size: 13px;
}

.service-card h3 {
  margin: 0 0 8px;
  font-size: 15px;
  color: var(--primary-dark);
}

.app-section-header {
  display: flex;
  align-items: center;
  gap: 26px;
  padding: 28px;
  border-radius: 16px;
  background: #fff;
  box-shadow: 0 18px 40px rgba(79, 70, 229, 0.08);
  margin-bottom: 30px;
}

.app-icon-wrapper {
  width: 86px;
  height: 86px;
  border-radius: 22px;
  background: #e0e7ff;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  padding: 12px;
}

.app-icon-wrapper img {
  width: 64px;
  height: 64px;
  border-radius: 18px;
  box-shadow: 0 10px 24px rgba(37, 99, 235, 0.25);
}

.app-kicker {
  margin: 0 0 6px;
  font-size: 13px;
  letter-spacing: 2px;
  color: var(--primary-dark);
  text-transform: uppercase;
}

.app-feature-list {
  margin: 16px 0 0;
  padding-left: 18px;
  color: var(--text-sub);
  font-size: 14px;
  line-height: 1.7;
}

.app-feature-list li + li {
  margin-top: 4px;
}

.app-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 18px;
}

.app-shot {
  background: #fff;
  border-radius: 18px;
  padding: 16px;
  box-shadow: 0 14px 30px rgba(15, 23, 42, 0.08);
}

.app-shot img {
  border-radius: 12px;
  box-shadow: 0 10px 25px rgba(15, 23, 42, 0.1);
}

.app-shot figcaption {
  margin-top: 10px;
  font-size: 13px;
  color: var(--text-sub);
  text-align: center;
}

/* APP 图片灯箱预览 */

.image-lightbox {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 999;
  padding: 20px;
}

.image-lightbox-inner {
  max-width: 420px;
  width: 100%;
  max-height: calc(100vh - 80px);
  background: #ffffff;
  border-radius: 18px;
  box-shadow: 0 24px 60px rgba(15, 23, 42, 0.35);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.image-lightbox-img-wrapper {
  padding: 16px;
  background: #0b1120;
}

.image-lightbox-img-wrapper img {
  width: 100%;
  height: auto;
  border-radius: 16px;
  display: block;
}

.image-lightbox-caption {
  padding: 10px 16px 14px;
  font-size: 13px;
  color: var(--text-sub);
  text-align: center;
}

.image-lightbox-close {
  position: absolute;
  top: 18px;
  right: 18px;
  width: 32px;
  height: 32px;
  border-radius: 999px;
  border: none;
  background: rgba(15, 23, 42, 0.75);
  color: #e5e7eb;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
}

.image-lightbox-close:hover {
  background: rgba(15, 23, 42, 0.9);
}

/* 页脚 */

.site-footer {
  background: #191b27;
  color: #dfe4ff;
  margin-top: 40px;
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 36px 20px 28px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 40px;
}

.footer-column h4 {
  margin: 0 0 10px;
}

.footer-column ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-column li {
  font-size: 13px;
  padding: 6px 0;
}

.footer-column a {
  color: #dfe4ff;
  opacity: 0.9;
}

.footer-column a:hover {
  opacity: 1;
  color: #ffffff;
  text-decoration: underline;
}

.footer-contact p {
  margin: 0 0 6px;
  font-size: 13px;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  text-align: center;
  padding: 10px 20px 16px;
  font-size: 12px;
  color: #9ca3c8;
}

.icp-link {
  color: #c7d2fe;
  margin-left: 6px;
}

.icp-link:hover {
  text-decoration: underline;
}

/* 返回顶部按钮 */

.back-to-top {
  position: fixed;
  right: 18px;
  bottom: 26px;
  width: 38px;
  height: 38px;
  border-radius: 6px;
  border: none;
  background: var(--primary);
  color: #ffffff;
  cursor: pointer;
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.25);
  opacity: 0;
  transform: translateY(10px);
  pointer-events: none;
  transition: all 0.2s ease;
}

.back-to-top.show {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

/* 响应式 */

@media (max-width: 960px) {
  .hero {
    grid-template-columns: minmax(0, 1fr);
    padding-bottom: 40px;
  }

  .hero-visual {
    order: -1;
  }

  .layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .service-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .app-section-header {
    flex-direction: column;
    text-align: center;
  }

  .app-feature-list {
    text-align: left;
  }

  .footer-inner {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 720px) {
  .top-bar {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }

  .main-nav {
    flex-wrap: wrap;
    gap: 12px;
  }

  .cloud-diagram {
    width: 100%;
  }

  .service-grid {
    grid-template-columns: minmax(0, 1fr);
  }
}