/* 全局 - 科技深色主题 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Segoe UI", "Microsoft Yahei", sans-serif;
}

body {
  background-color: #0a0e27;
  color: #e0e6ed;
  font-size: 14px;
  line-height: 1.7;
  background-image:
    linear-gradient(rgba(10,14,39,0.9), rgba(10,14,39,0.9)),
    url("data:image/svg+xml,%3Csvg width='100' height='100' viewBox='0 0 100 100' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M11 18c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm48 25c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm-43-7c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm63 31c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zM34 90c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm56-76c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zM12 86c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm28-65c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm23-11c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm-6 80c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm29-55c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zM32 63c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm57-13c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm-9-21c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM60 91c1.105 0 2-.895 2-2s-.895-2-60-2-2 .895-2 2 .895 2 2 2zM35 41c1.105 0 2-.895 2-2s-.895-2-35-2-2 .895-2 2 .895 2 2 2zM12 60c1.105 0 2-.895 2-2s-.895-2-12-2-2 .895-2 2 .895 2 2 2z' fill='%233b82f6' fill-opacity='0.06' fill-rule='evenodd'/%3E%3C/svg%3E");
  background-attachment: fixed;
}

a {
  text-decoration: none;
  transition: all 0.3s ease;
}

/* 导航栏 */
.top-header {
  height: 65px;
  background: rgba(15,23,42,0.9);
  border-bottom: 1px solid rgba(59,130,246,0.2);
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 999;
  backdrop-filter: blur(10px);
}
.header-container {
  max-width: 1300px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 100%;
  padding: 0 20px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 12px;
}
.logo img {
  width: 45px;
  height: 45px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid #3b82f6;
  box-shadow: 0 0 10px #3b82f670;
}
.logo span {
  font-size: 17px;
  font-weight: 600;
  color: #3b82f6;
  text-shadow: 0 0 8px #3b82f670;
}
.top-nav a {
  margin: 0 16px;
  color: #94a3b8;
  position: relative;
}
.top-nav a:hover {
  color: #3b82f6;
}
.top-nav a::after {
  content: "";
  position: absolute;
  bottom: -6px;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, #3b82f6, #1d4ed8);
  transition: width 0.3s;
}
.top-nav a:hover::after {
  width: 100%;
}

/* 布局 - 加宽版，左右不空 */
.main-container {
  max-width: 1300px;
  margin: 90px auto 50px;
  display: flex;
  gap: 20px;
  padding: 0 15px;
}

/* 左侧菜单 */
.left-nav {
  width: 240px;
  background: rgba(15,23,42,0.8);
  border: 1px solid rgba(59,130,246,0.2);
  border-radius: 12px;
  padding: 20px 0;
  flex-shrink: 0;
  backdrop-filter: blur(10px);
}
.nav-title {
  padding: 0 20px 15px;
  border-bottom: 1px solid rgba(59,130,246,0.2);
  margin-bottom: 10px;
}
.nav-title h3 {
  font-size: 18px;
  color: #3b82f6;
  margin-bottom: 4px;
  text-shadow: 0 0 8px #3b82f670;
}
.nav-title span {
  font-size: 12px;
  color: #64748b;
}
.nav-list {
  list-style: none;
}
.nav-list li a {
  display: block;
  padding: 12px 20px;
  color: #94a3b8;
  border-left: 3px solid transparent;
}
.nav-list li.active a {
  background: rgba(59,130,246,0.1);
  color: #3b82f6;
  border-left-color: #3b82f6;
}
.nav-list li a:hover:not(.active) {
  background: rgba(59,130,246,0.05);
  color: #3b82f6;
}

/* 右侧内容 - 加宽更饱满 */
.right-content {
  flex: 1;
  background: rgba(15,23,42,0.8);
  border: 1px solid rgba(59,130,246,0.2);
  border-radius: 12px;
  padding: 35px 40px;
  backdrop-filter: blur(10px);
}
.content-header {
  padding-bottom: 18px;
  border-bottom: 2px solid #3b82f6;
  margin-bottom: 30px;
}
.content-header h1 {
  font-size: 24px;
  color: #3b82f6;
  text-shadow: 0 0 8px #3b82f670;
}
.section-title {
  font-size: 18px;
  color: #3b82f6;
  margin-bottom: 16px;
  padding-left: 12px;
  border-left: 4px solid #3b82f6;
  text-shadow: 0 0 8px #3b82f670;
}
.content-section {
  margin-bottom: 35px;
}
.content-section p {
  text-indent: 2em;
  color: #94a3b8;
  line-height: 1.8;
  margin-bottom: 16px;
}

/* 图片 */
.arch-img {
  max-width: 90%;
  height: auto;
  display: block;
  margin: 0 auto 10px;
  border-radius: 8px;
  border: 1px solid rgba(59,130,246,0.3);
  box-shadow: 0 8px 25px rgba(0,0,0,0.4);
  transition: transform 0.3s ease;
}
.arch-img:hover {
  transform: scale(1.02);
}
.img-desc {
  text-align: center;
  color: #64748b;
  font-size: 14px;
  margin-bottom: 24px;
  text-indent: 0 !important;
}

/* 功能列表 —— 两列 */
.feature-list {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}
.feature-list li {
  padding: 12px 16px;
  background: rgba(59,130,246,0.05);
  border: 1px solid rgba(59,130,246,0.2);
  border-radius: 8px;
  color: #cbd5e1;
}
.feature-list li::before {
  content: "▶";
  color: #3b82f6;
  margin-right: 8px;
}
.feature-list li:hover {
  background: rgba(59,130,246,0.12);
  border-color: #3b82f6;
}

/* 价值 */
.value-list {
  list-style: none;
}
.value-list li {
  padding: 12px 16px;
  margin-bottom: 10px;
  background: rgba(16,185,129,0.07);
  border: 1px solid rgba(16,185,129,0.2);
  border-radius: 8px;
}
.value-list li::before {
  content: "✓";
  color: #10b981;
  margin-right: 8px;
}

/* 页脚 */
.footer {
  background: #0f172a;
  border-top: 1px solid rgba(59,130,246,0.2);
  color: #64748b;
  text-align: center;
  padding: 25px 0;
  margin-top: 40px;
}

/* 移动端 */
@media (max-width:768px) {
  .main-container {
    flex-direction: column;
  }
  .left-nav {
    width: 100%;
  }
  .feature-list {
    grid-template-columns: 1fr;
  }
}