* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Microsoft YaHei", sans-serif;
}
html, body {
  background: #0b1210;
  color: #e0e0e0;
  min-height: 100vh;
}
/* 科技感绿色导航 */
.header {
  background: linear-gradient(90deg, #052e14, #004d23);
  border-bottom: 1px solid #00ff5533;
  display: flex;
  justify-content: space-between;
  padding: 18px 30px;
  align-items: center;
  position: relative;
  z-index: 99;
}
.header::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, #00ff5500, #00ff55aa, #00ff5500);
}
.logo {
  font-size: 22px;
  font-weight: bold;
  color: #00ff55;
}
.nav {
  display: flex;
  list-style: none;
  gap: 26px;
}
.nav a {
  color: #e0e0e0;
  text-decoration: none;
  font-size: 15px;
  transition: 0.3s;
}
.nav a:hover {
  color: #00ff55;
}
/* 科技Banner */
.banner {
  background: linear-gradient(135deg, #072414, #003d1f);
  padding: 80px 20px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.banner::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 200"><defs><pattern id="g" width="20" height="20" patternUnits="userSpaceOnUse"><path d="M0 10 L20 10 M10 0 L10 20" stroke="%2300ff5515" stroke-width="1"/></pattern></defs><rect width="100%" height="100%" fill="url(%23g)"/></svg>');
  opacity: 0.1;
}
.banner h1 {
  font-size: 32px;
  color: #ffffff;
  position: relative;
  z-index: 2;
}
.banner p {
  margin-top: 10px;
  color: #00ff55;
  font-size: 16px;
}
/* 内容区 */
.main {
  max-width: 1100px;
  margin: 50px auto;
  padding: 0 20px;
}
.card {
  background: #0f241b;
  border: 1px solid #00ff5533;
  border-radius: 16px;
  padding: 40px;
  box-shadow: 0 0 30px #00ff5510;
}
.card h2 {
  color: #00ff55;
  margin-bottom: 24px;
  text-align: center;
}
/* 表单 */
.input-box {
  margin-bottom: 20px;
}
.input-box label {
  display: block;
  margin-bottom: 8px;
  color: #ccc;
}
.input-box input {
  width: 100%;
  height: 54px;
  background: #1a3529;
  border: 1px solid #00ff5544;
  border-radius: 12px;
  padding: 0 18px;
  color: #fff;
  outline: none;
}
.input-box input:focus {
  border-color: #00ff55;
}
button {
  width: 100%;
  height: 54px;
  background: linear-gradient(90deg, #009933, #00cc44);
  color: #fff;
  font-size: 16px;
  border: none;
  border-radius: 12px;
  cursor: pointer;
  transition: 0.3s;
}
button:hover {
  background: #00ff55;
  color: #000;
}
/* 结果 */
.result {
  margin-top: 24px;
  padding: 20px;
  border-radius: 12px;
  line-height: 1.8;
  font-size: 15px;
}
.result.success {
  background: #003311;
  border: 1px solid #00ff5566;
  color: #00ff55;
}
.result.fail {
  background: #2a1010;
  border: 1px solid #ff444466;
  color: #ff8888;
}
/* 产品 */
.product-item {
  background: #122a1f;
  border: 1px solid #00ff5522;
  padding: 24px;
  border-radius: 12px;
  margin-bottom: 16px;
}
/* 底部 */
.footer {
  background: #071a10;
  border-top: 1px solid #00ff5522;
  text-align: center;
  padding: 36px 20px;
  color: #777;
  font-size: 14px;
}