*{margin:0;padding:0;box-sizing:border-box;}

  /* 使用您提供的配色方案 */
  :root{
    --brand: #fdce2f;           /* 主色 - 黄色 */
    --dark: #3c3c3c;           /* 辅助色 - 深灰色 */
    --light: #f5f5f5;          /* 浅灰色背景 */
    --white: #ffffff;          /* 白色 */
    --text: #333333;           /* 正文文字颜色 */
    --muted: #666666;          /* 次要文字颜色 */
    --border: #e0e0e0;         /* 边框颜色 */
    --shadow: 0 8px 20px rgba(60, 60, 60, 0.08);
    --shadow-hover: 0 12px 30px rgba(60, 60, 60, 0.15);
    --radius: 10px;
  }

  body {
    background-color: var(--white);
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  }

  .about-section{
    background: var(--white);
    color: var(--text);
    max-width: 1400px;
    margin: 0 auto;
    padding: 30px 40px 80px;
    line-height: 1.7;
  }

  /* Breadcrumb */
  .breadcrumb{
    display:flex;align-items:center;gap:10px;
    font-size:14px;
    color: var(--muted);
    margin-bottom: 25px;
    padding-bottom: 15px;
    border-bottom: 1px solid var(--border);
  }
  .breadcrumb a{
    color: var(--dark);
    text-decoration:none;
    font-weight: 600;
    transition: color 0.2s;
  }
  .breadcrumb a:hover{ 
    color: var(--brand); 
  }
  .separator{ color: #ccc; }
  .current{ 
    color: var(--dark); 
    font-weight: 700;
    position: relative;
  }
  .current::after {
    content: '';
    position: absolute;
    bottom: -16px;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--brand);
  }

  /* Header */
  .page-header{
    text-align:center;
    padding: 30px 0 40px;
    margin-bottom: 30px;
  }
  .page-title{
    font-size: clamp(38px, 4vw, 58px);
    font-weight: 800;
    color: var(--dark);
    line-height:1.1;
    margin-bottom: 18px;
    letter-spacing: -0.5px;
    position: relative;
    display: inline-block;
  }
  .page-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: var(--brand);
    border-radius: 2px;
  }
  .page-subtitle{
    font-size: 17px;
    color: var(--muted);
    max-width: 920px;
    margin: 25px auto 0;
    line-height: 1.6;
  }

  /* Stats */
  .stats-container{
    display:grid;
    grid-template-columns: repeat(4,1fr);
    gap:20px;
    margin: 40px 0 80px;
    padding: 30px;
    border-radius: var(--radius);
    background: linear-gradient(135deg, var(--dark) 0%, #2a2a2a 100%);
    color: var(--white);
    box-shadow: var(--shadow);
    position: relative;
    overflow: hidden;
  }
  .stats-container::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 200px;
    height: 200px;
    background: var(--brand);
    border-radius: 50%;
    opacity: 0.1;
    transform: translate(100px, -100px);
  }
  .stat-item{
    text-align:center;
    padding: 28px 15px;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.12);
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
    position: relative;
    z-index: 1;
  }
  .stat-item:hover{
    transform: translateY(-6px);
    background: rgba(255, 255, 255, 0.15);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
  }
  .stat-number{
    font-size: 30px;
    font-weight: 800;
    color: var(--white);
    margin-bottom: 5px;
  }
  .stat-label{
    font-size:13px;
    color: rgba(255, 255, 255, 0.85);
    text-transform:uppercase;
    letter-spacing:1px;
    font-weight:600;
  }

  /* Sections */
  .content-section{ margin: 0 0 90px; }
  .bg-soft{
    background: var(--light);
    padding: 60px 40px;
    border-radius: calc(var(--radius) + 4px);
    border: 1px solid var(--border);
    margin: 0 0 90px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.03);
  }

  .section-header{
    text-align:center;
    margin-bottom:45px;
  }
  .section-title{
    font-size: clamp(30px, 2.5vw, 42px);
    font-weight: 800;
    color: var(--dark);
    margin-bottom: 15px;
    letter-spacing: -0.3px;
  }
  .section-description{
    font-size:16px;
    color: var(--muted);
    max-width: 820px;
    margin: 0 auto 20px;
    line-height: 1.6;
  }
  .section-divider{
    height:4px;
    width:100px;
    background: var(--brand);
    margin: 0 auto;
    border-radius: 2px;
    position: relative;
  }
  .section-divider::after {
    content: '';
    position: absolute;
    width: 40px;
    height: 4px;
    background: var(--dark);
    left: 50%;
    transform: translateX(-50%);
    top: 0;
  }

  /* Profile */
  .profile-grid{
    display:grid;
    grid-template-columns: 1.05fr .95fr;
    gap: 45px;
    align-items: center;
  }
  .text-block p{
    margin-bottom: 20px;
    font-size: 16px;
    color: var(--text);
    line-height: 1.7;
  }
  .text-block strong{ 
    color: var(--dark); 
    font-weight: 700;
    background: linear-gradient(transparent 70%, rgba(253, 206, 47, 0.3) 70%);
  }

  .features-list{
    display:flex;
    flex-wrap:wrap;
    gap:15px;
    margin-top: 28px;
  }
  .feature-tag{
    display:flex;
    align-items:center;
    gap:12px;
    background: var(--white);
    padding: 14px 18px;
    border-radius: 50px;
    border: 1px solid var(--border);
    color: var(--dark);
    font-weight: 600;
    font-size: 14px;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
    cursor: pointer;
  }
  .feature-tag:hover{
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
    border-color: var(--brand);
  }
  .feature-icon{
    width:42px;
    height:42px;
    border-radius: 50%;
    background: var(--brand);
    color: var(--dark);
    display:flex;
    align-items:center;
    justify-content:center;
    font-size: 13px;
    font-weight: 700;
    flex-shrink: 0;
    transition: all 0.3s ease;
  }
  .feature-tag:hover .feature-icon {
    background: var(--dark);
    color: var(--white);
    transform: rotate(5deg);
  }

  .profile-image{
    position:relative;
    border-radius: var(--radius);
    overflow:hidden;
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    height: 480px;
    background: #e8e8e8;
    transition: all 0.4s ease;
  }
  .profile-image:hover {
    transform: scale(1.02);
    box-shadow: var(--shadow-hover);
  }
  .profile-image img{
    width:100%;
    height:100%;
    object-fit:cover;
    display:block;
    transition: transform 0.5s ease;
  }
  .profile-image:hover img {
    transform: scale(1.05);
  }
  .image-overlay{
    position:absolute;
    left:0;
    right:0;
    bottom:0;
    padding: 20px 25px;
    background: linear-gradient(180deg, transparent 0%, rgba(60, 60, 60, 0.85) 100%);
    color: var(--white);
  }
  .image-overlay span{
    font-weight: 600;
    font-size: 15px;
    letter-spacing: 0.5px;
  }

  /* Advantages */
  .advantages-grid{
    display:grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 22px;
  }
  .advantage-card{
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 26px 20px;
    text-align:center;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
  }
  .advantage-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--brand);
    transform: scaleX(0);
    transition: transform 0.4s;
    transform-origin: left;
  }
  .advantage-card:hover{
    transform: translateY(-8px);
    box-shadow: var(--shadow-hover);
  }
  .advantage-card:hover::before {
    transform: scaleX(1);
  }
  .advantage-icon{
    width:60px;
    height:60px;
    border-radius: 16px;
    margin: 0 auto 18px;
    display:flex;
    align-items:center;
    justify-content:center;
    background: var(--brand);
    color: var(--dark);
    font-size: 26px;
    box-shadow: 0 6px 15px rgba(253, 206, 47, 0.25);
    transition: all 0.3s ease;
  }
  .advantage-card:hover .advantage-icon {
    background: var(--dark);
    color: var(--brand);
    transform: rotate(5deg) scale(1.1);
  }
  .advantage-title{
    font-size: 16px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 12px;
    line-height: 1.3;
  }
  .advantage-description{
    font-size: 14px;
    color: var(--muted);
    line-height: 1.6;
  }

  /* Certification */
  .certifications-grid{
    display:grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 22px;
  }
  .certificate-card{
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px 20px;
    text-align:center;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
  }
  .certificate-card:hover{ 
    transform: translateY(-8px); 
    box-shadow: var(--shadow-hover);
    border-color: var(--brand);
  }
  .certificate-icon{
    width:80px;
    height:80px;
    margin: 0 auto 18px;
    border-radius: 18px;
    background: var(--brand);
    color: var(--dark);
    display:flex;
    align-items:center;
    justify-content:center;
    font-size:22px;
    font-weight:800;
    box-shadow: 0 8px 20px rgba(253, 206, 47, 0.25);
    transition: all 0.3s ease;
  }
  .certificate-card:hover .certificate-icon {
    background: var(--dark);
    color: var(--brand);
    transform: rotate(5deg);
  }
  .certificate-title{
    font-size:17px;
    font-weight:700;
    color: var(--dark);
    margin-bottom:10px;
  }
  .certificate-desc{
    font-size:14px;
    color: var(--muted);
  }

  /* Reviews - 优化后的部分，使用首字母圆形色块 */
  .reviews-grid{
    display:grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 25px;
  }
  .review-card{
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 30px 24px;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
  }
  .review-card:hover{ 
    transform: translateY(-8px); 
    box-shadow: var(--shadow-hover);
    border-color: var(--brand);
  }
  .review-header{
    display:flex;
    align-items:center;
    gap:18px;
    margin-bottom:22px;
  }
  
  /* 修正：为深色背景的圆形添加白色字体 */
  .reviewer-avatar{
    width:70px;
    height:70px;
    border-radius: 50%;
    display:flex;
    align-items:center;
    justify-content:center;
    font-weight: 700;
    font-size: 22px;
    flex-shrink: 0;
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.15);
    transition: all 0.3s ease;
  }
  
  /* 黄色背景的圆形 */
  .reviewer-yellow {
    background-color: var(--brand);
    color: var(--dark);
  }
  
  /* 深色背景的圆形 - 修正为白色字体 */
  .reviewer-dark {
    background-color: var(--dark);
    color: var(--white); /* 修正：改为白色字体 */
  }
  
  .review-card:hover .reviewer-avatar {
    transform: scale(1.1);
  }
  
  .reviewer-info{
    flex: 1;
  }
  .reviewer-name{
    font-size:17px;
    font-weight:700;
    color: var(--dark);
    margin-bottom:4px;
  }
  .reviewer-position{
    font-size:14px;
    color: var(--muted);
    margin-bottom:10px;
  }
  .review-stars{
    color: var(--brand);
    letter-spacing:2px;
    font-size:15px;
    filter: drop-shadow(0 2px 3px rgba(0,0,0,0.1));
  }
  .review-content{
    margin-bottom:22px;
    padding-bottom:22px;
    border-bottom:1px solid var(--border);
    flex: 1;
  }
  .review-content p{
    color: var(--text);
    font-style:italic;
    line-height:1.7;
    font-size:15px;
    position: relative;
    padding-left: 15px;
  }
  .review-content p::before {
    content: '"';
    position: absolute;
    left: 0;
    top: -5px;
    font-size: 24px;
    color: var(--brand);
    font-weight: bold;
  }
  .review-date{
    text-align:right;
    color: var(--muted);
    font-size:14px;
    font-weight:500;
  }

  /* Responsive */
  @media (max-width: 1200px){
    .advantages-grid{grid-template-columns:repeat(3,1fr);}
    .certifications-grid{grid-template-columns:repeat(2,1fr);}
    .reviews-grid{grid-template-columns:repeat(2,1fr);}
    .profile-grid{grid-template-columns:1fr;}
    .stats-container{grid-template-columns:repeat(2,1fr);}
  }
  @media (max-width: 992px){
    .advantages-grid{grid-template-columns:repeat(2,1fr);}
  }
  @media (max-width: 768px){
    .about-section{padding: 20px 20px 60px;}
    .bg-soft{padding: 40px 25px;}
    .stats-container{grid-template-columns:1fr;}
    .advantages-grid{grid-template-columns:1fr;}
    .certifications-grid{grid-template-columns:1fr;}
    .reviews-grid{grid-template-columns:1fr;}
    .profile-image{height: 350px;}
    .feature-tag{width: 100%;}
    .page-title::after{width: 60px;}
  }
  @media (max-width: 480px){
    .about-section{padding: 15px 15px 50px;}
    .page-header{padding: 20px 0 30px;}
    .section-header{margin-bottom: 35px;}
    .content-section{margin-bottom: 70px;}
    .bg-soft{margin-bottom: 70px; padding: 30px 20px;}
  }