body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
    background-color: #fff;
    margin: 0;
    padding: 40px;
    color: #111;
  }
  
  .container {
    max-width: 960px;
    margin: 0 auto;
  }
  
  h1 {
    font-size: 2em;
    text-align: center;
    line-height: 1.4;
    margin-bottom: 40px;
  }
  
  .form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    align-items: start;
  }
  
  .form-group {
    display: flex;
    flex-direction: column;
  }
  
  .form-group label {
    font-weight: 600;
    margin-bottom: 6px;
  }
  
  .radio-group label {
    display: block;
    margin-bottom: 6px;
  }
  
  .inline-input {
    width: 180px;
    margin-left: 8px;
  }
  
  input[type="file"],
  input[type="email"],
  select {
    padding: 8px;
    font-size: 1em;
  }
  
  button {
    padding: 10px 20px;
    font-size: 1em;
    font-weight: bold;
    background-color: #444;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
  }
  
  button:hover {
    background-color: #222;
  }
  
  .submit-area {
    grid-column: 1 / span 2;
    text-align: right;
  }
  
  

  .hero {
  background: #25543c;       
  color: #ffffff;
  text-align: center;
  padding: 60px 20px;
  margin-bottom: 50px;
  margin-top: 40px;
}

.hero-title {
  font-size: 3rem;
  margin: 0 0 12px 0;
  font-weight: 700;
}

.hero-subtitle {
  font-size: 1.25rem;
  margin: 0;
  font-weight: 400;
}


.hero-logo {
  position: absolute;
  top: 0px;          
  left: 80px;         
  width: 80px;      
  height: 80px;
  object-fit: contain;
}


.upload-wrapper {
  display: inline-flex;      
  align-items: center;
  column-gap: 8px;          
  font-size: 1rem;         
  font-family: inherit;
}


.upload-btn {
  display: inline-block;
  flex: 0 0 auto;  
  width: auto;  
  padding: 5px 12px;                
  background: #fafafa;            
  border: 1px solid #000000;       
  border-radius: 4px;
  color: #000;
  cursor: pointer;
  line-height: 1.2;
  user-select: none;


  box-shadow:
    inset 0 1px 2px rgba(255,255,255,0.7),
    0 1px 2px rgba(0,0,0,0.08);
}

.upload-btn:hover   { background: #f0f0f0; }
.upload-btn:active  { background: #e6e6e6; box-shadow: none; }


.file-name {
  color: #3c3c3c;           
  white-space: nowrap;      
  font-size: inherit;
}

/* ===== About-section：flex 两栏布局 ===== */

.about-section {
  margin-top: 60px;
  display: flex;
  gap: 40px;
}


.toc {
  flex: 0 0 200px;           
  font-size: 0.9rem;
  line-height: 1.6;
}

.toc h4 {
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-size: 0.8rem;
  margin-top: 0;
  margin-bottom: 12px;
  color: #666;
}

.toc nav {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toc a {
  text-decoration: none;
  color: #333;
  padding-left: 4px;
  border-left: 3px solid transparent;
}

.toc a:hover,
.toc a:focus {
  border-color: #0070f3;
  color: #0070f3;
}


.about-content {
  flex: 1 1 0;
  max-width: 720px;
}

.about-content h2 {
  margin-top: 0;
}

.about-content hr {
  border: none;
  border-top: 1px solid #e0e0e0;
  margin: 32px 0;
}

@media (max-width: 800px) {
  .about-section {
    flex-direction: column;
  }
  .toc {
    flex: none;
    margin-bottom: 24px;
  }
}

.about-section {
  margin: 60px auto;       
  max-width: 960px;      
  display: flex;
  gap: 40px;
}


.site-footer {
  background: #eef1f1;         
  border-top: 1px solid #c5c5c5; 
  margin-top: 60px;            
  padding: 24px 0;
  font-size: 0.95rem;
}

.footer-inner {
  max-width: 960px;              
  margin: 0 auto;
  text-align: center;
}


.footer-logos {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 32px;                      
  margin-bottom: 12px;
}

.footer-logos img {
  height: 60px;                   
  object-fit: contain;
}


.footer-copy {
  margin: 8px 0;
}

.site-footer a {
  color: #0066cc;
  text-decoration: none;
}
.site-footer a:hover {
  text-decoration: underline;
}


@media (max-width: 600px) {
  .footer-logos {
    gap: 20px;
  }
  .footer-logos img {
    height: 36px;
  }
}

.about-title {
  max-width: 960px;     
  margin: 0 auto;     
  margin-top: 60px; 
}