:root {
    --primary: #1a365d;
    --primary-light: #2d4a73;
    --accent: #d4af37;
    --text-dark: #1a202c;
    --text-light: #4a5568;
    --bg-light: #f7fafc;
    --white: #ffffff;
}

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    color: var(--text-dark);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Navigation */
nav {
    position: fixed;
    top: 0;
    width: 100%;
    background: var(--white);
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    z-index: 1000;
    transition: all 0.3s ease;
}

nav.scrolled {
    padding: 0.5rem 0;
    box-shadow: 0 4px 20px rgba(0,0,0,0.15);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0.5rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1rem;
    font-weight: 700;
    /* color: var(--primary); */
}

.logo span {
    color: var(--accent);

}

.nav-links {
    display: flex;
    gap: 2.5rem;
    list-style: none;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    transition: color 0.3s;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: width 0.3s;
}

.nav-links a:hover::after {
    width: 100%;
}

.nav-links a:hover {
    color: var(--primary);
}

/* Hero Section */
.hero {
    margin-top: 80px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: var(--white);
    padding: 8rem 2rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><defs><pattern id="grid" width="100" height="100" patternUnits="userSpaceOnUse"><path d="M 100 0 L 0 0 0 100" fill="none" stroke="rgba(255,255,255,0.05)" stroke-width="1"/></pattern></defs><rect width="100%" height="100%" fill="url(%23grid)"/></svg>');
    opacity: 0.3;
}

.hero-content {
    max-width: 900px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

.hero .accent-text {
    color: var(--accent);
}

.hero p {
    font-size: 1.3rem;
    margin-bottom: 2.5rem;
    opacity: 0.95;
}

.cta-button {
    display: inline-block;
    padding: 1rem 2.5rem;
    background: var(--accent);
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
    border-radius: 5px;
    transition: all 0.3s;
    box-shadow: 0 4px 15px rgba(212, 175, 55, 0.3);
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(212, 175, 55, 0.4);
}

/* Services Section */
.services {
    padding: 6rem 2rem;
    background: var(--bg-light);
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    color: var(--primary);
    margin-bottom: 1rem;
}

.section-subtitle {
    text-align: center;
    color: var(--text-light);
    font-size: 1.2rem;
    margin-bottom: 4rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.services-grid {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.service-card {
    background: var(--white);
    padding: 2.5rem;
    border-radius: 10px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    transition: all 0.3s;
    border-top: 3px solid var(--accent);
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0,0,0,0.15);
}

.service-icon {
    font-size: 3rem;
    margin-bottom: 1.5rem;
}

.service-card h3 {
    color: var(--primary);
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.service-card p {
    color: var(--text-light);
    line-height: 1.8;
}

/* IPO Services Section */
.ipo-services {
    padding: 6rem 2rem;
    background: var(--white);
}

.ipo-container,.about-container {
    max-width: 1200px;
    margin: 0 auto;
}

.ipo-intro {
    max-width: 900px;
    margin: 0 auto 4rem;
    text-align: center;
}

.ipo-intro p {
    font-size: 1.1rem;
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 1rem;
}

.ipo-phases {
    margin-top: 4rem;
}

.phase-card {
    background: var(--bg-light);
    border-radius: 10px;
    padding: 3rem;
    margin-bottom: 3rem;
    border-left: 5px solid var(--accent);
    box-shadow: 0 4px 20px rgba(0,0,0,0.05);
}

.phase-header {
    display: flex;
    align-items: center;
    margin-bottom: 2rem;
    gap: 1.5rem;
}

.phase-number {
    background: var(--accent);
    color: var(--primary);
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    font-weight: 700;
    flex-shrink: 0;
}

.phase-title {
    color: var(--primary);
    font-size: 1.8rem;
    font-weight: 600;
}

.phase-duration {
    color: var(--accent);
    font-size: 0.95rem;
    font-weight: 600;
    margin-top: 0.3rem;
}

.scope-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.scope-item {
    background: var(--white);
    padding: 1.5rem;
    border-radius: 8px;
    border-left: 3px solid var(--primary);
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.scope-item h4 {
    color: var(--primary);
    margin-bottom: 0.8rem;
    font-size: 1.1rem;
}

.scope-item ul {
    list-style: none;
    padding-left: 0;
}

.scope-item li {
    color: var(--text-light);
    padding: 0.4rem 0 0.4rem 1.5rem;
    position: relative;
}

.scope-item li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--accent);
    font-weight: 700;
}

/* Case Studies Section */
.case-studies {
    padding: 6rem 2rem;
    background: var(--bg-light);
}

.case-studies-container {
    max-width: 1200px;
    margin: 0 auto;
}

.case-studies-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.case-study-card {
    background: var(--white);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    transition: all 0.3s;
}

.case-study-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0,0,0,0.15);
}

.case-image-placeholder {
    width: 100%;
    height: 200px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.case-image-placeholder img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.case-content {
    padding: 2rem;
}

.case-content h3 {
    color: var(--primary);
    font-size: 1.4rem;
    margin-bottom: 1rem;
}

.case-content p {
    color: var(--text-light);
    line-height: 1.6;
}

/* About Section */
.about {
    padding: 6rem 2rem;
    background: var(--white);
}

.about-content {
    max-width: 1200px;
    margin: 0 auto;
    /* display: grid; */
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    text-align: center;
}

.about-text h2 {
    font-size: 2.5rem;
    color: var(--primary);
    margin-bottom: 1.5rem;
}

.about-text p {
    color: var(--text-light);
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

.stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
    margin-top: 3rem;
}

.stat-item {
    text-align: center;
    padding: 1.5rem;
    background: var(--bg-light);
    border-radius: 8px;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--accent);
    display: block;
}

.stat-label {
    color: var(--text-light);
    margin-top: 0.5rem;
}

/* Expertise Section */
.expertise {
    padding: 6rem 2rem;
    background: var(--primary);
    color: var(--white);
}

.expertise-grid {
    max-width: 1200px;
    margin: 3rem auto 0;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.expertise-item {
    padding: 2rem;
    background: rgba(255,255,255,0.1);
    border-radius: 8px;
    border-left: 4px solid var(--accent);
    transition: all 0.3s;
}

.expertise-item:hover {
    background: rgba(255,255,255,0.15);
    transform: translateX(5px);
}

.expertise-item h3 {
    color: var(--accent);
    margin-bottom: 0.5rem;
    font-size: 1.3rem;
}

/* Contact Section */
.contact {
    padding: 6rem 2rem;
    background: var(--bg-light);
}

.contact-container {
    max-width: 800px;
    margin: 0 auto;
    background: var(--white);
    padding: 3rem;
    border-radius: 10px;
    box-shadow: 0 4px 30px rgba(0,0,0,0.1);
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.contact-item {
    text-align: center;
    padding: 1.5rem;
    background: var(--bg-light);
    border-radius: 8px;
}

.contact-item-icon {
    font-size: 2rem;
    color: var(--accent);
    margin-bottom: 1rem;
}

.contact-item h3 {
    color: var(--primary);
    font-size: 1rem;
    margin-bottom: 0.5rem;
}

.contact-item p {
    color: var(--text-light);
}

.contact-item a {
    color: var(--primary);
    text-decoration: none;
}

.contact-item a:hover {
    color: var(--accent);
}

/* Footer */
footer {
    background: var(--primary);
    color: var(--white);
    padding: 1rem 2rem 1.5rem;
    text-align: center;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    margin-top: 2rem;
}

.footer-links a {
    color: var(--white);
    text-decoration: none;
    opacity: 0.8;
    transition: opacity 0.3s;
}

.footer-links a:hover {
    opacity: 1;
}

.copyright {
    padding-top: 2rem;
    border-top: 1px solid rgba(255,255,255,0.1);
    opacity: 0.6;
}

/* Highlight Box */
.highlight-box {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: var(--white);
    padding: 2.5rem;
    border-radius: 10px;
    margin: 3rem 0;
    box-shadow: 0 6px 30px rgba(26, 54, 93, 0.2);
}

.highlight-box h3 {
    color: var(--accent);
    font-size: 1.6rem;
    margin-bottom: 1rem;
}

.highlight-box p {
    line-height: 1.8;
    opacity: 0.95;
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .hero h1 {
        font-size: 2.5rem;
    }

    .hero p {
        font-size: 1.1rem;
    }

    .about-content {
        grid-template-columns: 1fr;
    }

    .stats {
        grid-template-columns: 1fr;
    }

    .contact-container {
        padding: 2rem 1.5rem;
    }

    .scope-list {
        grid-template-columns: 1fr;
    }

    .phase-card {
        padding: 2rem 1.5rem;
    }

    .phase-header {
        flex-direction: column;
        align-items: flex-start;
    }
}

/* Smooth Scroll */
html {
    scroll-behavior: smooth;
}

/* Fade-in animation */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeInUp 0.8s ease-out;
}
.lang-switch {
    background: rgba(255,255,255,0.1);
    border: 1px solid rgba(255,255,255,0.2);
    color: #333;
    padding: 0.5rem 1rem;
    border-radius: 25px;
    cursor: pointer;
    transition: all 0.3s;
}

.lang-switch:hover {
    background: rgba(255,255,255,0.2);
}.logo-container {
    display: flex;
    flex-direction: column;
    justify-content: center; /* 垂直居中 */
    align-items: center; /* 水平居中，如果需要的话 */
    height: 100%; /* 设置适当的高度，以确保有足够的空间进行垂直居中 */
}

.new-logo {
    width: 200px;
    margin-bottom: auto; /* 这将把新logo推到最上方，同时保持与现有logo之间的间隔 */
}

.case-studies {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
  }

  .case-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 25px;
  }

  .case-card {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
  }

  .case-card:hover {
    transform: translateY(-5px);
  }

  .carousel {
    position: relative;
    width: 100%;
    height: 220px;
  }

  .carousel-inner {
    position: relative;
    width: 100%;
    height: 100%;
  }

  .slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 0.5s ease-in-out;
    object-fit: cover;
  }

  .slide.active {
    opacity: 1;
  }

  .prev-btn, .next-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(0,0,0,0.5);
    color: white;
    border: none;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    font-size: 18px;
    cursor: pointer;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .prev-btn { left: 10px; }
  .next-btn { right: 10px; }

  .prev-btn:hover, .next-btn:hover {
    background: rgba(0,0,0,0.8);
  }

  .dots {
    display: flex;
    justify-content: center;
    padding: 12px 0;
    gap: 8px;
    position: absolute;
    bottom: 0%;
    left: 42%;
  }

  .dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #ccc;
    cursor: pointer;
    transition: background 0.3s;
  }

  .dot.active {
    background: #0066cc;
  }

  .case-card h3 {
    font-size: 1.1rem;
    padding: 0 16px 8px;
    color: #333;
    padding-top: 1rem;
    text-align: center;
  }

  .case-card p {
    font-size: 0.9rem;
    color: #666;
    padding: 0 16px 16px;
  }
  .english-content a{
      text-decoration: none;
      color: #333;
      font-weight: bold;
  }
  #case-studies {
    /* padding-top: 120px;    */
    margin-top: -120px;    /* 抵消 padding，视觉位置不变 */
    /* 其他样式... */
  }