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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f9fa;
}

.toggle-btn {
    background-color: #003b77;
    border: none;
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1rem;
    transition: background-color 0.3s ease;
}

.toggle-btn:hover {
    background-color: #004080;
}

.darkmode .toggle-btn {
    background-color: #144ca4;
    border: none;
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1rem;
    transition: background-color 0.3s ease;
}

.toggle-btn:hover {
    background-color: #004080;
}

/* Header styles */
.header {
    position: fixed;
}

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: rgba(255, 255, 255, 0.95);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, background-color 0.3s ease;
    padding: 1rem;
    z-index: 1000;
  }
  
.header.hidden {
    transform: translateY(-100%);
}
  
.header.transparent {
    background-color: transparent;
    box-shadow: none;
}
  
.header.scrolled {
    background-color: white;
}
  
.header-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
  
.header-right {
    display: flex;
    align-items: center;
    gap: 1rem;
}
  
.home-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    color: white;
    font-size: 0.9rem;
    transition: color 0.3s ease;
}
  
.header.scrolled .home-link {
    color: #002b5c;
}
  
.tics-logo {
    width: 24px;
    height: 24px;
    border-radius: 4px;
  }
  
  .header-title {
    color: white;
    transition: color 0.3s ease;
  }
  
  .header.scrolled .header-title {
    color: #002b5c;
  }
  
  .lang-button {
    color: white;
    transition: color 0.3s ease;
  }
  
  .header.scrolled .lang-button {
    color: #666;
  }
  
  .header.scrolled .lang-button:hover {
    color: #002b5c;
  }

.tics-logo {
    width: 24px;
    height: 24px;
    border-radius: 4px;
}

.divider {
    width: 1px;
    height: 24px;
    background-color: rgba(0, 43, 92, 0.2);
}


.logo-container {
    display: flex;
    align-items: center;
}

.logo-small {
    width: 40px;
    height: 40px;
}

.header-title {
    margin-left: 1rem;
    font-size: 1.25rem;
    font-weight: 600;
    color: white;
    transition: color 0.3s ease;
}

.header.scrolled .header-title {
    color: #002B5C;
}

/* Hero section */
.hero {
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: #002B5C;
    color: white;
    text-align: center;
    position: relative;
}

.hero-content {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    height: 100%;
    padding-bottom: 0; /* 移除底部内边距 */
}

.hero-logo {
    width: 200px;
    height: 200px;
    margin-bottom: 2rem;
}

.hero h1 {
    font-size: 4rem;
    font-weight: lighter;
    letter-spacing: 5px;
    margin-bottom: 1rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.hero p {
    font-size: 1.5rem;
    opacity: 0.9;
    font-weight: lighter;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.scroll-button {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    background: none;
    border: none;
    color: white;
    cursor: pointer;
    animation: bounce 2s infinite;
    z-index: 2;
}


@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0) translateX(-50%);
    }
    40% {
        transform: translateY(-20px) translateX(-50%);
    }
    60% {
        transform: translateY(-10px) translateX(-50%);
    }
}

/* Main content styles */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 4rem 1rem;
}

/* Section styles */
.section-title {
    text-align: center;
    font-size: 2.5rem;
    color: #002B5C;
    margin-bottom: 2rem;
    position: relative;
    padding-bottom: 1rem;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 3px;
    background-color: #002B5C;
}

.introduction {
    margin-bottom: 4rem;
}

/* Introduction section */
.intro-section {
    margin-bottom: 2rem;
    padding: 1.5rem;
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.intro-section:last-child {
    margin-bottom: 0;
}

.intro-section h3 {
    color: #002B5C;
    font-size: 1.5rem;
    margin-bottom: 1rem;
    position: relative;
    padding-left: 1rem;
}

.intro-section h3::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 1.5em;
    background-color: #002B5C;
    border-radius: 2px;
}


.members-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 4rem;
  }
  
.member-card,
.acknowledgment-card {
    background: white;
    border-radius: 12px;
    padding: 1.5rem;
    text-align: center;
    transition: all 0.3s ease;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    border: 1px solid rgba(0, 43, 92, 0.1);
}
  
.member-card:hover,
.acknowledgment-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 15px rgba(0, 43, 92, 0.2);
}
  
.full-height {
    height: 100vh;
    min-height: 600px;
}
  
.hero {
    background-color: #002b5c;
    background-image: linear-gradient(135deg, #002b5c 0%, #004080 100%);
    color: white;
    text-align: center;
    position: relative;
    overflow: hidden;
}
  
.hero::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: url(./TIH.png);
    background-size: 300px;
    background-repeat: repeat;
    opacity: 0.05;
    animation: backgroundScroll 60s linear infinite;
}
  
@keyframes backgroundScroll {
    from {
      background-position: 0 0;
    }
    to {
      background-position: 300px 300px;
    }
}
  
.hero-content {
    position: relative;
    z-index: 1;
}
  
.section-title {
    text-align: center;
    font-size: 2.5rem;
    color: #002b5c;
    margin-bottom: 2rem;
    position: relative;
    padding-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 2px;
}
  
.section-title::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 3px;
    background-color: #002b5c;
    border-radius: 3px;
}
  

/* Recruitment section styles */
.recruitment {
    margin-bottom: 4rem;
}

.recruitment-content {
    text-align: center;
    padding: 3rem;
    background: white;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.recruitment-content p {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    color: #333;
}

.recruitment-button {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    background-color: #002B5C;
    color: white;
    text-decoration: none;
    border-radius: 8px;
    font-size: 1.125rem;
    transition: all 0.3s ease;
}

.recruitment-button:hover {
    background-color: #003875;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 43, 92, 0.2);
}

.recruitment-button svg {
    transition: transform 0.3s ease;
}

.recruitment-button:hover svg {
    transform: translateX(4px);
}

/* Acknowledgments section */
.acknowledgments-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 4rem;
}

.acknowledgment-card {
    background: white;
    border-radius: 8px;
    padding: 1.5rem;
    text-align: center;
    transition: all 0.3s ease;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.acknowledgment-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 12px rgba(0, 0, 0, 0.15);
}

/* Footer styles */
.footer {
    background: #002B5C;
    color: white;
    padding: 2rem;
    text-align: center;
}

.footer p {
    margin-bottom: 0.5rem;
}

.footer .copyright {
    font-size: 0.875rem;
    opacity: 0.8;
}

/* Language button */
.lang-button {
    background: none;
    border: none;
    padding: 0.5rem;
    cursor: pointer;
    color: white;
    font-size: 1.25rem;
    transition: color 0.3s ease;
}

.header.scrolled .lang-button {
    color: #666;
}

.header.scrolled .lang-button:hover {
    color: #002B5C;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 3rem;
    }

    .hero p {
        font-size: 1.25rem;
    }

    .header-title {
        font-size: 0.75rem;
    }

    .logo-small {
        width: 30px;
        height: 30px;
    }

    .section-title {
        font-size: 2rem;
    }

    .members-grid,
    .acknowledgments-grid {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    }
}

@media (max-width: 768px) {
    .hero h1 {
        font-size: 3rem;
    }

    .hero p {
        font-size: 1.25rem;
    }

    .header-title {
        font-size: 0.75rem;
    }

    .logo-small {
        width: 30px;
        height: 30px;
    }

    .section-title {
        font-size: 2rem;
    }

    .members-grid,
    .acknowledgments-grid {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    }

    .hero h1.darkmode {
        font-size: 3rem;
    }

    .hero p.darkmode {
        font-size: 1.25rem;
    }

    .darkmode .header-title {
        font-size: 0.75rem;
    }

    .darkmode .logo-small {
        width: 30px;
        height: 30px;
    }

    .darkmode .section-title {
        font-size: 2rem;
    }

    .darkmode .members-grid,
    .darkmode .acknowledgments-grid {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    }
}

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

body.darkmode  {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #cccccc;
    background-color: #1b1b1f;
}

.darkmode .header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: rgba(255, 255, 255, 0.95);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, background-color 0.3s ease;
    padding: 1rem;
    z-index: 1000;
}

.darkmode .header.hidden {
    transform: translateY(-100%);
}

.darkmode .header.transparent {
    background-color: transparent;
    box-shadow: none;
}

.darkmode .header.scrolled {
    background-color: #1b1b1f;
}

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

.darkmode .header-right {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.darkmode .home-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    color: white;
    font-size: 0.9rem;
    transition: color 0.3s ease;
}

.darkmode .header.scrolled .home-link {
    color: white;
}

.darkmode .tics-logo {
    width: 24px;
    height: 24px;
    border-radius: 4px;
}

.darkmode .header-title {
    color: white;
    transition: color 0.3s ease;
}

.darkmode .header.scrolled .header-title {
    color: white;
}

.darkmode .header.scrolled .lang-button {
    color: #666;
}

.darkmode .header.scrolled .lang-button:hover {
    color: #4166f5;
}

.darkmode .divider {
    width: 1px;
    height: 24px;
    background-color: rgba(0, 43, 92, 0.2);
}

.darkmode .logo-container {
    display: flex;
    align-items: center;
}

.darkmode .logo-small {
    width: 40px;
    height: 40px;
}

.darkmode .header-title {
    margin-left: 1rem;
    font-size: 1.25rem;
    font-weight: 600;
    color: white;
    transition: color 0.3s ease;
}

/* Hero section */
.darkmode .hero {
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: #4166f5;
    color: white;
    text-align: center;
    position: relative;
}

.darkmode .hero-content {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    height: 100%;
    padding-bottom: 0;
}

.darkmode .hero-logo {
    width: 200px;
    height: 200px;
    margin-bottom: 2rem;
}

.darkmode .hero h1 {
    font-size: 4rem;
    font-weight: lighter;
    letter-spacing: 5px;
    margin-bottom: 1rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.darkmode .hero p {
    font-size: 1.5rem;
    opacity: 0.9;
    font-weight: lighter;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.darkmode .scroll-button {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    background: none;
    border: none;
    color: white;
    cursor: pointer;
    animation: bounce 2s infinite;
    z-index: 2;
}

/* Main content styles */
.darkmode .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 4rem 1rem;
    background-color: #1b1b1f;
}

/* Section styles */
.darkmode .section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 3px;
    background-color: #4166f5;
}

.darkmode .introduction {
    margin-bottom: 4rem;
}

/* Introduction section */
.darkmode .intro-section {
    margin-bottom: 2rem;
    padding: 1.5rem;
    background: #23232b;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.darkmode .intro-section:last-child {
    margin-bottom: 0;
}

.darkmode .intro-section h3 {
    color: #4166f5;
    font-size: 1.5rem;
    margin-bottom: 1rem;
    position: relative;
    padding-left: 1rem;
}

.darkmode .intro-section h3::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 1.5em;
    background-color: #4166f5;
    border-radius: 2px;
}

.darkmode .members-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 4rem;
}

.darkmode .member-card,
.darkmode .acknowledgment-card {
    background: #2b2b33;
    border-radius: 12px;
    padding: 1.5rem;
    text-align: center;
    transition: all 0.3s ease;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    border: 1px solid rgba(0, 43, 92, 0.1);
}

.darkmode .member-card:hover,
.darkmode .acknowledgment-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 15px rgba(0, 43, 92, 0.2);
}

.darkmode .full-height {
    height: 100vh;
    min-height: 600px;
}

.darkmode .hero {
    background-color: #4166f5;
    background-image: linear-gradient(135deg, #4166f5 0%, #004080 100%);
    color: white;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.darkmode .hero::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: url(./TIH.png);
    background-size: 300px;
    background-repeat: repeat;
    opacity: 0.05;
    animation: backgroundScroll 60s linear infinite;
}

.darkmode .hero-content {
    position: relative;
    z-index: 1;
}

.darkmode .section-title {
    text-align: center;
    font-size: 2.5rem;
    color: #4166f5;
    margin-bottom: 2rem;
    position: relative;
    padding-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.darkmode .section-title::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 3px;
    background-color: #4166f5;
    border-radius: 3px;
}

/* Recruitment section styles */
.darkmode .recruitment {
    margin-bottom: 4rem;
}

.darkmode .recruitment-content {
    text-align: center;
    padding: 3rem;
    background: #2b2b33;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.darkmode .recruitment-content p {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    color: #cccccc;
}

.darkmode .recruitment-button {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    background-color: #4166f5;
    color: white;
    text-decoration: none;
    border-radius: 8px;
    font-size: 1.125rem;
    transition: all 0.3s ease;
}

.darkmode .recruitment-button:hover {
    background-color: #003875;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 43, 92, 0.2);
}

.darkmode .recruitment-button svg {
    transition: transform 0.3s ease;
}

.darkmode .recruitment-button:hover svg {
    transform: translateX(4px);
}

/* Acknowledgments section */
.darkmode .acknowledgments-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 4rem;
}

/* Footer styles */
.darkmode .footer {
    background: #4166f5;
    color: white;
    padding: 2rem;
    text-align: center;
}

.darkmode .footer p {
    margin-bottom: 0.5rem;
}

.darkmode .footer .copyright {
    font-size: 0.875rem;
    opacity: 0.8;
}

/* Language button */
.darkmode .lang-button {
    background: none;
    border: none;
    padding: 0.5rem;
    cursor: pointer;
    color: white;
    font-size: 1.25rem;
    transition: color 0.3s ease;
}

.darkmode .header.scrolled .lang-button {
    color: #666;
}

.darkmode .header.scrolled .lang-button:hover {
    color: #4166f5;
}