html,
body {
  height: 100%;
  margin: 0;
  padding: 0;
}

body {
  display: flex;
  flex-direction: column;
  min-height: 90vh;
  font-family: 'Segoe UI', 'Helvetica Neue', Arial, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background: #f8fafc;
}

header {
  /* background: linear-gradient(to right, #1e3a8a, #2563eb); */
  /* background-color: #f5f5f5; */
  /* color: white; */
  padding: 0;
  box-shadow: 0 2px 8px rgba(30, 58, 138, 0.04);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1200px;
  /* max-height: 2.5em; */
  margin: 0 auto;
  padding: 1.0rem 1.2rem 1.0rem 0;
}

.logo {

  font-size: 2.4rem;
  font-weight: 900;
  letter-spacing: 1px;
  line-height: 1;
  padding: 0;
  margin-left: 1rem;
  display: inline-flex;
  align-items: baseline;
  gap: 0.4em;
  font-family: sans-serif, 'Segoe UI', 'Trebuchet MS';
  color: #ffffff;
  text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.3);
}

.logo-subtitle {
  font-size: 1.1rem;
  font-weight: 500;
  color: #d1d5db;
  /* 柔和浅灰 */
  margin-top: 0.15rem;
  font-family: 'Segoe UI', 'Trebuchet MS', sans-serif;
  letter-spacing: 0;
  text-transform: uppercase;
  opacity: 0.85;
}

nav a {
  margin-left: 1.5rem;
  /* color: #dbeafe; */
  font-size: 1rem;
  text-decoration: none;
  transition: color 0.2s;
  line-height: 1;
  padding: 0;
}


nav a:hover {
  color: #fff;
}

.banner {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
  padding: 0.4rem 0 0.8rem;
}

.banner {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
  padding: 0.6rem 0 1rem;
}

.banner h1 {
  font-size: 2.1rem;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 0.4rem;
  color: #1f2937;
  /* 深灰，提升专业感 */
}

.banner p {
  font-size: 1rem;
  line-height: 1.6;
  margin-bottom: 0;
  color: #4b5563;
  /* 淡灰，更柔和 */
}

.btn,
.btn-alt {
  display: inline-block;
  margin: 0 0.5rem;
  padding: 0.7rem 2.2rem;
  border-radius: 6px;
  font-weight: 500;
  background: linear-gradient(90deg, #2563eb 70%, #3b82f6 100%);
  color: #fff;
  text-decoration: none;
  transition: background 0.2s;
  box-shadow: 0 2px 8px rgba(59, 130, 246, .09);
}

.btn-alt {
  background: #fff;
  color: #2563eb;
  border: 1px solid #3b82f6;
  margin-left: 0.5rem;
}

.btn-alt:hover {
  background: #eff6ff;
  color: #1e3a8a;
}

.btn:hover {
  background: linear-gradient(90deg, #1e40af 70%, #60a5fa 100%);
}

main,
.container {
  flex: 1;
  width: 100%;
  max-width: 1200px;
  margin: 3.2em auto;
  display: flex;
  flex-direction: column;
  gap: 2.2rem;
  box-sizing: border-box;
  padding: 0 1rem;
}


.highlight-gradient {
  background: linear-gradient(to right, #3b82f6, #8b5cf6);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  padding: 0;
  margin: 0;
}

.highlight-gradient2 {
  background: linear-gradient(to right, #06f, #a855f7);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  padding: 0;
  margin-left: -18px;
}

/* 产品工具卡片布局 */
.tools,
.release-list {
  padding: 0 0.5rem;
}

.tool-list,
.release-list-cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
  margin-top: 1.3rem;
}

.tool-card,
.software-card,
.release-card {
  background: white;
  border-radius: 12px;
  box-shadow: 0 2px 12px rgba(30, 58, 138, 0.07);
  padding: 1.2rem 1.2rem 1.4rem 1.2rem;
  text-align: left;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: box-shadow 0.2s;
}

.tool-card h3,
.software-card h2 {
  color: #1e3a8a;
  margin-top: 0;
}

.tool-card p,
.software-card p {
  color: #333;
  flex: 1;
  margin: 0.6rem 0 1rem 0;
}

.tool-card a,
.software-card a {
  color: #3b82f6;
  text-decoration: none;
  font-weight: 500;
}

.tool-card a:hover,
.software-card a:hover {
  text-decoration: underline;
}

.back-link {
  display: inline-block;
  font-size: 0.95rem;
  color: #2563eb;
  text-decoration: none;
  background-color: rgba(37, 99, 235, 0.06); /* 淡蓝背景 */
  padding: 6px 12px;
  border-radius: 6px;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.back-link:hover {
  background-color: rgba(37, 99, 235, 0.12);
  color: #1d4ed8;
  text-decoration: none;
}


/* 版本信息区块 */
.version-block {
  background: white;
  margin-bottom: 1rem;
  padding: 1rem;
  border-left: 4px solid #3b82f6;
  border-radius: 6px;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.05);
}

/* 优势与案例卡片 */
.why,
.cases {
  margin: 1rem 0rem;
}

.why-list,
.case-list {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  margin-top: 0.2rem;
}

.why-card,
.case-card {
  background: white;
  border-radius: 10px;
  box-shadow: 0 2px 10px rgba(30, 58, 138, 0.06);
  padding: 1.2rem 1.4rem;
  min-width: 260px;
  flex: 1;
}

.why-card {
  color: #1e40af;
  font-size: 1.07rem;
}

.case-card strong {
  color: #2563eb;
}

footer {
  /* background-color: #f5f5f5; */
  padding: 12px 0;
  font-size: 14px;
  color: #444;
}

.footer-container {
  display: flex;
  align-items: center;
  justify-content: center;
  /* ⬅ 整体居中 */
  gap: 48px;
  max-width: 800px;
  margin: 0 auto;
  /* ⬅ 中央对齐 */
  padding: 0 12px;
}

.footer-logo {
  width: 96px;
  height: 96px;
  border-radius: 12px;
  background-color: transparent;
  flex-shrink: 0;
}

.footer-content {
  gap: 4px;
}

hr {
  height: 1px;
  border: none;
  background-color: #d1d5db;
  /* 或 #ccc, #999 等可见颜色 */
  margin: 0rem 0;
}

@media (max-width: 900px) {

  .tool-list,
  .release-list-cards,
  .why-list,
  .case-list {
    grid-template-columns: 1fr !important;
    flex-direction: column;
  }

  .nav {
    flex-direction: column;
    gap: 1rem;
    padding: 1.2rem 1rem;
  }

  .banner {
    padding: 1.8rem 0.4rem 1.5rem 0.4rem;
  }
}

@media (max-width: 600px) {
  .logo {
    margin-left: 0;
  }

  main,
  .container {
    padding: 0 0.2rem;
  }
}