* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Microsoft YaHei", PingFang SC, Hiragino Sans GB, sans-serif;
}
html {
  scroll-behavior: smooth;
}
body {
  background: #ffffff;
  color: #222;
  overflow-x: hidden;
}
a {
  text-decoration: none;
  color: inherit;
}
ul {
  list-style: none;
}
img {
  max-width: 100%;
}
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 15px;
}
.section {
  padding: 80px 0;
}
.text-center {
  text-align: center;
}
.bg-gray {
  background: #f7f9fd;
}

/* 通用标题 */
.sec-title {
  font-size: 32px;
  color: #081738;
  font-weight: 700;
  margin-bottom: 12px;
  position: relative;
  display: inline-block;
  padding-bottom: 15px;
}
.sec-title::after {
  content: "";
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  bottom: 0;
  width: 70px;
  height: 3px;
  background: #369bff;
}
.sec-desc {
  font-size: 16px;
  color: #666;
  line-height: 1.8;
  max-width: 750px;
  margin: 0 auto 55px;
}

/* 顶部导航 */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 80px;
  background: #081738;
  z-index: 9999;
  box-shadow: 0 2px 15px rgba(0,0,0,0.1);
}
.nav-wrap {
  height: 80px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.logo {
  font-size: 26px;
  font-weight: 700;
  color: #fff;
}
.logo span {
  color: #369bff;
}
.nav-menu {
  display: flex;
  gap: 30px;
}
.nav-menu a {
  color: #e8edf8;
  font-size: 15px;
  transition: 0.3s;
  padding: 8px 0;
  position: relative;
}
.nav-menu a:hover {
  color: #369bff;
}
.nav-menu a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  background: #369bff;
  transition: 0.3s;
}
.nav-menu a:hover::after {
  width: 100%;
}
.nav-btn {
  background: #369bff;
  color: #fff;
  padding: 10px 24px;
  border-radius: 50px;
  font-size: 15px;
  font-weight: 600;
  transition: 0.3s;
}
.nav-btn:hover {
  background: #2888e6;
}
.top-empty {
  height: 80px;
}

/* 侧边悬浮栏 */
.fix-sidebar {
  position: fixed;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 9998;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.fix-item {
  width: 50px;
  height: 50px;
  background: #081738;
  color: #fff;
  border-radius: 8px;
  text-align: center;
  line-height: 50px;
  font-size: 13px;
  transition: 0.3s;
}
.fix-item.tel {
  background: #369bff;
}
.fix-item:hover {
  opacity: 0.9;
}

/* 首屏Banner */
.hero {
  width: 100%;
  background: linear-gradient(135deg, #081738 0%, #0f2458 50%, #143075 100%);
  padding: 100px 0 120px;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  width: 800px;
  height: 800px;
  background: rgba(54,155,255,0.05);
  border-radius: 50%;
  right: -300px;
  top: -300px;
}
.hero-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 50px;
  position: relative;
  z-index: 2;
}
.hero-left {
  flex: 1;
  min-width: 320px;
}
.hero-tag {
  display: inline-block;
  padding: 6px 20px;
  border: 1px solid rgba(54,155,255,0.4);
  border-radius: 50px;
  color: #369bff;
  font-size: 14px;
  margin-bottom: 25px;
  background: rgba(54,155,255,0.08);
}
.hero-left h1 {
  font-size: 44px;
  color: #fff;
  line-height: 1.3;
  margin-bottom: 25px;
}
.hero-left h1 span {
  color: #369bff;
}
.hero-desc {
  font-size: 17px;
  color: #e8edf8;
  opacity: 0.9;
  line-height: 1.8;
  margin-bottom: 35px;
}
.hero-btns {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}
.btn {
  padding: 14px 36px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  transition: 0.3s;
}
.btn-blue {
  background: #369bff;
  color: #fff;
  box-shadow: 0 5px 15px rgba(54,155,255,0.3);
}
.btn-blue:hover {
  background: #2888e6;
}
.btn-trans {
  border: 1px solid #369bff;
  color: #369bff;
  background: transparent;
}
.btn-trans:hover {
  background: rgba(54,155,255,0.1);
}
.hero-right {
  flex: 1;
  min-width: 320px;
}
.ai-platform-list {
  display: grid;
  grid-template-columns: repeat(3,1fr);
  gap: 20px;
}
.ai-item {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(54,155,255,0.15);
  border-radius: 12px;
  padding: 20px 10px;
  text-align: center;
  transition: 0.3s;
}
.ai-item:hover {
  transform: translateY(-5px);
  background: rgba(54,155,255,0.12);
}
.ai-item p {
  color: #fff;
  font-size: 15px;
  margin-top: 8px;
}

/* 企业数据板块 */
.data-box {
  display: grid;
  grid-template-columns: repeat(4,1fr);
  gap: 25px;
  margin-top: -50px;
  position: relative;
  z-index: 3;
}
.data-card {
  background: #fff;
  box-shadow: 0 8px 25px rgba(0,0,0,0.08);
  border-radius: 14px;
  padding: 30px 20px;
  text-align: center;
}
.data-num {
  font-size: 36px;
  font-weight: 700;
  color: #369bff;
  margin-bottom: 10px;
}
.data-text {
  font-size: 15px;
  color: #666;
}

/* GEO运营介绍 */
.intro-grid {
  display: grid;
  grid-template-columns: repeat(3,1fr);
  gap: 28px;
}
.intro-card {
  background: #fff;
  padding: 32px 26px;
  border-radius: 14px;
  box-shadow: 0 3px 18px rgba(0,0,0,0.06);
  transition: 0.3s;
}
.intro-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 8px 24px rgba(54,155,255,0.13);
}
.intro-card h3 {
  font-size: 19px;
  color: #081738;
  margin-bottom: 13px;
}
.intro-card p {
  color: #666;
  font-size: 14.5px;
  line-height: 1.7;
}

/* 核心服务 */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3,1fr);
  gap: 26px;
}
.service-card {
  background: #fff;
  border-radius: 14px;
  padding: 30px;
  box-shadow: 0 3px 15px rgba(0,0,0,0.05);
  transition: 0.3s;
}
.service-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 25px rgba(56,144,255,0.12);
}
.service-card h3 {
  font-size: 19px;
  margin-bottom: 14px;
  color: #081738;
}
.service-card p {
  font-size: 14px;
  color: #666;
  line-height: 1.7;
}

/* 优势板块 */
.grid-4 {
  display: grid;
  grid-template-columns: repeat(4,1fr);
  gap: 22px;
}
.adv-card {
  background: #fff;
  border-radius: 14px;
  padding: 28px 20px;
  box-shadow: 0 3px 15px rgba(0,0,0,0.05);
  text-align: center;
  transition: 0.3s;
}
.adv-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 25px rgba(56,144,255,0.12);
}
.adv-card h3 {
  font-size: 18px;
  color: #081738;
  margin: 14px 0 8px;
}
.adv-card p {
  font-size: 14px;
  color: #666;
  line-height: 1.7;
}

/* 推广对比板块 */
.compare-box {
  max-width: 1040px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 35px;
}
.compare-left {
  background: #f4f6fc;
  padding: 35px 30px;
  border-radius: 14px;
}
.compare-right {
  background: #081738;
  color: #fff;
  padding: 35px 30px;
  border-radius: 14px;
}
.compare-left h3, .compare-right h3 {
  text-align: center;
  font-size: 20px;
  margin-bottom: 22px;
  padding-bottom: 12px;
  border-bottom: 1px solid #ddd;
}
.compare-right h3 {
  border-color: rgba(255,255,255,0.2);
}
.compare-item {
  padding: 12px 0;
  border-bottom: 1px solid #e4e7f2;
  font-size: 15px;
  color: #444;
}
.compare-right .compare-item {
  border-color: rgba(255,255,255,0.15);
  color: #e8edf8;
}

/* 成功案例 */
.case-card {
  border-radius: 14px;
  overflow: hidden;
  background: #fff;
  box-shadow: 0 3px 16px rgba(0,0,0,0.06);
  transition: 0.3s;
}
.case-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 24px rgba(54,155,255,0.13);
}
.case-img {
  height: 190px;
  background: #e6f2ff;
  display: grid;
  place-items: center;
  color: #369bff;
  font-size: 16px;
}
.case-body {
  padding: 22px;
}
.case-body h4 {
  font-size: 17px;
  margin-bottom: 8px;
  color: #081738;
}
.case-body p {
  font-size: 14px;
  color: #666;
  line-height: 1.6;
}
.case-data {
  color: #369bff;
  font-weight: 600;
  margin-top: 8px;
}

/* 服务流程 */
.process-item {
  text-align: center;
  background: #fff;
  padding: 22px 12px;
  border-radius: 12px;
  box-shadow: 0 2px 12px rgba(0,0,0,0.05);
}
.step-num {
  width: 44px;
  height: 44px;
  background: #369bff;
  color: #fff;
  border-radius: 50%;
  display: grid;
  place-items: center;
  margin: 0 auto 14px;
  font-weight: 700;
}
.process-item p {
  font-size: 14px;
  color: #333;
  line-height: 1.6;
}

/* 合作行业 */
.industry-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
}
.industry-item {
  padding: 11px 24px;
  background: #eef5ff;
  border-radius: 50px;
  color: #081738;
  border: 1px solid #d2e7ff;
  font-size: 15px;
}

/* 新闻资讯板块 */
.news-tab {
  display: flex;
  justify-content: center;
  gap: 30px;
  margin-bottom: 40px;
}
.news-tab span {
  font-size: 17px;
  padding-bottom: 8px;
  cursor: pointer;
  color: #666;
  border-bottom: 2px solid transparent;
}
.news-tab span.active {
  color: #369bff;
  border-color: #369bff;
  font-weight: 600;
}
.news-grid {
  display: grid;
  grid-template-columns: repeat(2,1fr);
  gap: 30px;
}
.news-card {
  background: #fff;
  border-radius: 14px;
  padding: 25px;
  box-shadow: 0 3px 15px rgba(0,0,0,0.05);
  transition: 0.3s;
  display: flex;
  justify-content: space-between;
  flex-direction: column;
}
.news-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 25px rgba(54,155,255,0.12);
}
.news-title {
  font-size: 17px;
  color: #081738;
  font-weight: 600;
  margin-bottom: 12px;
  transition: 0.3s;
}
.news-card:hover .news-title {
  color: #369bff;
}
.news-desc {
  font-size: 14px;
  color: #666;
  line-height: 1.7;
  margin-bottom: 15px;
}
.news-date {
  font-size: 13px;
  color: #999;
}

/* 常见问答 */
.qa-list {
  max-width: 900px;
  margin: 0 auto;
}
.qa-item {
  background: #fff;
  border-radius: 10px;
  padding: 20px;
  margin-bottom: 15px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}
.qa-question {
  font-size: 16px;
  color: #081738;
  font-weight: 600;
  margin-bottom: 8px;
}
.qa-answer {
  font-size: 14px;
  color: #666;
  line-height: 1.7;
}

/* 底部 */
.footer {
  background: #081738;
  color: #e8edf8;
  padding: 60px 0 26px;
}
.foot-grid {
  display: grid;
  grid-template-columns: repeat(4,1fr);
  gap: 30px;
}
.foot-col h3 {
  font-size: 18px;
  margin-bottom: 20px;
}
.foot-col p {
  font-size: 14px;
  opacity: 0.8;
  line-height: 1.8;
  margin-bottom: 10px;
}
.copy {
  text-align: center;
  margin-top: 45px;
  padding-top: 22px;
  border-top: 1px solid rgba(255,255,255,0.1);
  font-size: 13px;
  opacity: 0.7;
}

/* 自适应适配 */
@media(max-width:992px){
  .grid-4{grid-template-columns:repeat(2,1fr);}
  .data-box{grid-template-columns:repeat(2,1fr);}
  .compare-box{grid-template-columns:1fr;}
  .news-grid{grid-template-columns:1fr;}
}
@media(max-width:768px){
  .nav-menu{display:none;}
  .grid-3{grid-template-columns:1fr;}
  .foot-grid{grid-template-columns:1fr;}
  .hero-left h1{font-size:32px;}
  .ai-platform-list{grid-template-columns:repeat(2,1fr);}
}
@media(max-width:480px){
  .ai-platform-list{grid-template-columns:1fr;}
  .hero-btns{justify-content:center;}
  .fix-sidebar{display:none;}
}