styles.css

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  margin: 0;
  padding: 0;
  background-color: #fff;
}

.title {
  text-align: center;
  background: linear-gradient(45deg, #2196F3, #4CAF50);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  font-size: 84px;
  margin: 120px auto 60px;
  font-weight: 700;
  font-family: -apple-system, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
  letter-spacing: -2px;
  max-width: 800px;
}

.input-group {
  display: flex;
  margin: 30px 0;
  gap: 10px;
  width: 100%;
  max-width: 800px;
}

.input-group input {
  flex: 1;
  padding: 12px 20px;
  border: 1px solid #ddd;
  border-radius: 24px;
  font-size: 16px;
  transition: all 0.3s ease;
  box-shadow: 0 2px 6px rgba(0,0,0,0.05);
}

.input-group input:focus {
  outline: none;
  border-color: #2196F3;
  box-shadow: 0 2px 8px rgba(33,150,243,0.2);
}

.download-btn {
  background: #1a73e8;
  color: white;
  border: none;
  padding: 12px 28px;
  border-radius: 24px;
  cursor: pointer;
  font-size: 16px;
  transition: all 0.3s ease;
  box-shadow: 0 2px 6px rgba(26,115,232,0.2);
}

.download-btn:hover {
  background: #1557b0;
  box-shadow: 0 4px 12px rgba(26,115,232,0.3);
}

.select-group {
  position: relative;
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 20px 0;
  width: 100%;
  max-width: 800px;
}

.select-group select {
  flex: 1;
  padding: 8px 16px;
  border: 1px solid #ddd;
  border-radius: 20px;
  transition: all 0.3s ease;
  box-shadow: 0 2px 6px rgba(0,0,0,0.05);
}

.select-group select:focus {
  outline: none;
  border-color: #2196F3;
  box-shadow: 0 2px 8px rgba(33,150,243,0.2);
}

.test-btn {
  background: #4CAF50;
  color: white;
  border: none;
  padding: 8px 20px;
  border-radius: 20px;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 2px 6px rgba(76,175,80,0.2);
}

.test-btn:hover {
  background: #388E3C;
  box-shadow: 0 4px 12px rgba(76,175,80,0.3);
}

.notice {
  background: #f0f7ff;
  border: 1px solid #cce5ff;
  color: #1a73e8;
  padding: 16px 24px;
  border-radius: 16px;
  margin: 20px 0;
  box-shadow: 0 2px 6px rgba(26,115,232,0.05);
}

.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 20px;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: white;
  z-index: 100;
}

.logo {
  font-size: 28px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 12px;
  background: linear-gradient(45deg, #2196F3, #4CAF50);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.logo::before {
  content: "";
  display: inline-block;
  width: 32px;
  height: 32px;
  background: url('data:image/svg+xml,<svg viewBox="0 0 16 16" xmlns="http://www.w3.org/2000/svg"><path fill="%23333" d="M8 0C3.58 0 0 3.58 0 8c0 3.54 2.29 6.53 5.47 7.59.4.07.55-.17.55-.38 0-.19-.01-.82-.01-1.49-2.01.37-2.53-.49-2.69-.94-.09-.23-.48-.94-.82-1.13-.28-.15-.68-.52-.01-.53.63-.01 1.08.58 1.23.82.72 1.21 1.87.87 2.33.66.07-.52.28-.87.51-1.07-1.78-.2-3.64-.89-3.64-3.95 0-.87.31-1.59.82-2.15-.08-.2-.36-1.02.08-2.12 0 0 .67-.21 2.2.82.64-.18 1.32-.27 2-.27.68 0 1.36.09 2 .27 1.53-1.04 2.2-.82 2.2-.82.44 1.1.16 1.92.08 2.12.51.56.82 1.27.82 2.15 0 3.07-1.87 3.75-3.65 3.95.29.25.54.73.54 1.48 0 1.07-.01 1.93-.01 2.2 0 .21.15.46.55.38A8.013 8.013 0 0016 8c0-4.42-3.58-8-8-8z"/></svg>') center/contain no-repeat;
}

.header-buttons {
  display: flex;
  gap: 10px;
}

.hosts-btn, .reaction-btn {
  padding: 8px 16px;
  border-radius: 20px;
  font-size: 14px;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.3s ease;
}

.hosts-btn {
  background: #f3f4f6;
  color: #333;
  border: 1px solid #ddd;
  box-shadow: 0 2px 6px rgba(0,0,0,0.05);
}

.hosts-btn:hover {
  background: #e5e7eb;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.reaction-btn {
  background: #1a73e8;
  color: white;
  border: none;
  box-shadow: 0 2px 6px rgba(26,115,232,0.2);
  text-decoration: none;
  display: inline-block;
}

.reaction-btn:hover {
  background: #1557b0;
  box-shadow: 0 4px 12px rgba(26,115,232,0.3);
}

/* 添加使用说明样式 */
.instructions {
  background: white;
  border-radius: 16px;
  padding: 24px 32px;
  margin: 20px 0 30px;
  box-shadow: 0 2px 12px rgba(0,0,0,0.08);
}

.instructions h2 {
  color: #1a73e8;
  font-size: 24px;
  margin: 0 0 16px;
  font-weight: 600;
}

.instructions ol, .instructions ul {
  margin: 0;
  padding-left: 24px;
}

.instructions li {
  margin: 12px 0;
  color: #333;
  line-height: 1.6;
}

.instructions ul li {
  list-style: none;
  margin: 16px 0;
}

.label {
  display: inline-block;
  min-width: 80px;
  color: #666;
  font-weight: 500;
}

.example-link {
  color: #1a73e8;
  text-decoration: none;
  word-break: break-all;
  background: #f0f7ff;
  padding: 4px 8px;
  border-radius: 4px;
  margin-left: 8px;
  transition: all 0.3s ease;
}

.example-link:hover {
  background: #e3f2fd;
  text-decoration: underline;
}

/* 确保使用说明在标题下方 */
.title + #results .instructions {
  margin-top: 0;
}

/* 调整主内容区域样式 */
.main-content {
  min-height: calc(100vh - 600px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 0 20px;
  max-width: 800px;
  margin: 0 auto;
  width: 100%;
}

/* 页脚样式 */
.footer {
  text-align: center;
  padding: 20px;
  margin-top: 40px;
  border-top: 1px solid #eee;
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.copyright {
  color: #666;
  font-size: 14px;
  text-align: left;
}

.github-link {
  color: #1a73e8;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  transition: color 0.3s ease;
}

.github-link:hover {
  color: #1557b0;
}

.github-icon {
  width: 20px;
  height: 20px;
  display: inline-block;
  background: url('data:image/svg+xml,<svg viewBox="0 0 16 16" xmlns="http://www.w3.org/2000/svg"><path fill="%231a73e8" d="M8 0C3.58 0 0 3.58 0 8c0 3.54 2.29 6.53 5.47 7.59.4.07.55-.17.55-.38 0-.19-.01-.82-.01-1.49-2.01.37-2.53-.49-2.69-.94-.09-.23-.48-.94-.82-1.13-.28-.15-.68-.52-.01-.53.63-.01 1.08.58 1.23.82.72 1.21 1.87.87 2.33.66.07-.52.28-.87.51-1.07-1.78-.2-3.64-.89-3.64-3.95 0-.87.31-1.59.82-2.15-.08-.2-.36-1.02.08-2.12 0 0 .67-.21 2.2.82.64-.18 1.32-.27 2-.27.68 0 1.36.09 2 .27 1.53-1.04 2.2-.82 2.2-.82.44 1.1.16 1.92.08 2.12.51.56.82 1.27.82 2.15 0 3.07-1.87 3.75-3.65 3.95.29.25.54.73.54 1.48 0 1.07-.01 1.93-.01 2.2 0 .21.15.46.55.38A8.013 8.013 0 0016 8c0-4.42-3.58-8-8-8z"/></svg>') center/contain no-repeat;
}

/* 修改使用说明样式以适应页脚 */
.footer .instructions {
  max-width: 1200px;
  margin: 0 auto;
  background: transparent;
  box-shadow: none;
  padding: 0 20px;
}

.footer .instructions h2 {
  color: #1a73e8;
  font-size: 20px;
  margin: 30px 0 16px;
  font-weight: 600;
}

.footer .instructions h2:first-child {
  margin-top: 0;
}

/* 调整示例链接样式 */
.footer .example-link {
  display: inline-block;
  margin-top: 4px;
  font-size: 14px;
}

#results {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 60px 0 0;
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
  box-sizing: border-box;
}

/* 修改自动选择提示的样式 */
.auto-select-notice {
  position: absolute;
  bottom: -30px;
  left: 0;
  color: #1a73e8;
  font-size: 14px;
  opacity: 1;
  transition: opacity 0.3s ease;
}

/* 添加测速提示样式 */
.speed-notice {
  position: absolute;
  bottom: -30px;
  left: 0;
  color: #1a73e8;
  font-size: 14px;
  animation: fadeInOut 3s ease-in-out forwards;
}

@keyframes fadeInOut {
  0% { opacity: 0; }
  20% { opacity: 1; }
  80% { opacity: 1; }
  100% { opacity: 0; }
}

/* 修改测试按钮禁用状态样式 */
.test-btn:disabled {
  background: #ccc;
  cursor: not-allowed;
}

#testProgress {
  color: #666;
  font-size: 14px;
}