/* Reset and basic styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Poppins', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #fff;
    overflow-x: hidden;
}

/* 主内容区域样式 */
.main-content {
    margin-top: 82px;
    padding: 0;
}

/* Contact information section */
.contact-section {
    padding: 50px 0;
    background-color: #fff;
    position: relative;
    overflow: hidden;
}

.contact-section::before {
    content: '';
    position: absolute;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    background: rgba(28, 36, 75, 0.03);
    top: -300px;
    left: -300px;
    z-index: 0;
}

.contact-section::after {
    content: '';
    position: absolute;
    width: 400px;
    height: 400px;
    border-radius: 50%;
    background: rgba(28, 36, 75, 0.05);
    bottom: -200px;
    right: -200px;
    z-index: 0;
}

.container-contact {
    max-width: 1500px;
    margin: 0 auto;
    padding: 0 30px;
    position: relative;
    z-index: 1;
}

.contact-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 120px;
    margin-top: 20px;
    justify-content: space-between;
}

.contact-info {
    flex: 0.8;
    min-width: 300px;
    position: relative;
    z-index: 2;
    padding-right: 20px;
    margin-left: 50px;
}

.contact-form {
    flex: 1.1;
    min-width: 300px;
    position: relative;
    z-index: 2;
    padding-left: 110px;
    margin-right: 120px;
    background-color: transparent;
    border-radius: 4px;
    box-shadow: none;
}

.contact-form form {
    max-width: 95%;
    margin: 0 0 0 auto;
    padding-right: 0;
    position: relative;
    right: -30px;
}

.contact-info h2,
.contact-form h2,
.faq-title h2 {
    font-size: 2rem;
    margin-bottom: 20px;
    color: #1C244B;
    position: relative;
    padding-bottom: 12px;
    font-weight: 600;
}

/* 添加section标题样式 */
.section-title {
    font-size: 2.2rem;
    color: #1C244B;
    text-align: center;
    margin-bottom: 30px;
    font-weight: 600;
    position: relative;
    padding-bottom: 12px;
}

.section-title:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: #1C244B;
}

/* Marketing Network styles */
.marketing-network-section {
    padding: 20px 0 0;
}
.marketing-network-img-wrapper img {
    filter: drop-shadow(0 6px 24px rgba(0,0,0,.06));
}
.map-tooltip {
    background: #1C244B;
    border-radius: 10px;
}

/* 移除之前为contact-info h2添加的特殊样式 */
.contact-info h2 {
    text-align: left;
    margin-top: 0;
    margin-bottom: 20px;
}

.section-title-dash {
    display: inline-block;
    width: 60px;
    height: 3px;
    background: #1C244B;
    margin-bottom: 25px;
}

.contact-item {
    margin-bottom: 15px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    padding: 8px;
    border-radius: 5px;
}

.contact-item:hover {
    transform: translateY(-5px);
}

.contact-item h3 {
    font-size: 1.2rem;
    margin-bottom: 6px;
    color: #1C244B;
    font-weight: 600;
    display: flex;
    align-items: center;
}

.contact-item i {
    margin-right: 15px;
    color: #1C244B;
    font-size: 1.3rem;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.3s ease;
}

.contact-item:hover i {
    transform: scale(1.2);
}

.contact-item p {
    color: #666;
    font-size: 1rem;
    margin: 3px 0 3px 45px;
    line-height: 1.5;
}

/* Form styles */
.form-group {
    margin-bottom: 16px;
}

.form-label {
    display: block;
    margin-bottom: 6px;
    font-weight: 500;
    color: #333;
    transition: color 0.3s ease;
    font-size: 0.95rem;
}

.form-control {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 0.95rem;
    transition: all 0.3s ease;
    background-color: #fff;
    position: relative;
}

.form-control::placeholder {
    color: #aaa;
    font-size: 0.9rem;
}

.form-control:focus {
    border-color: #1C244B;
    outline: none;
    background-color: #fff;
    box-shadow: 0 5px 15px rgba(28, 36, 75, 0.1);
}

.form-group:focus-within .form-label {
    color: #1C244B;
}

textarea.form-control {
    min-height: 120px;
    resize: vertical;
}

.form-row {
    display: flex;
    gap: 20px;
    margin-bottom: 25px;
}

.form-col {
    flex: 1;
    position: relative;
    overflow: hidden;
}

select.form-control {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%231C244B' class='bi bi-chevron-down' viewBox='0 0 16 16'%3E%3Cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 15px center;
    background-size: 16px;
    padding-right: 40px;
}

.file-upload {
    margin-bottom: 20px;
    position: relative;
}

.file-upload-container {
    position: relative;
    margin-top: 10px;
}

.file-input {
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 100%;
    opacity: 0;
    cursor: pointer;
    z-index: 2;
}

/* 添加文件上传限制提示的样式 */
.text-muted {
    color: #6c757d;
    font-size: 0.85rem;
    margin-top: 8px;
    display: block;
}

/* 修改文件上传区域的样式，适应提示文字 */
.file-drop-area {
    border: 2px dashed #ddd;
    border-radius: 4px;
    padding: 20px;
    text-align: center;
    background-color: #fff;
    transition: all 0.3s ease;
    margin-bottom: 10px;
    min-height: 120px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.file-drop-area i {
    font-size: 2.5rem;
    color: #1C244B;
    margin-bottom: 10px;
    display: block;
}

.file-drop-area p {
    color: #666;
    margin: 0;
}

.browse-files {
    color: #1C244B;
    font-weight: 600;
    cursor: pointer;
    text-decoration: underline;
}

.file-drop-area:hover, 
.file-drop-area.active {
    background-color: #f0f0f0;
    border-color: #1C244B;
}

.file-names {
    margin-top: 10px;
}

.file-name-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 12px;
    background: #f0f0f0;
    border-radius: 4px;
    margin-bottom: 5px;
}

.file-name-item .file-name {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-size: 0.9rem;
}

.file-name-item .remove-file {
    color: #ff3860;
    cursor: pointer;
    margin-left: 10px;
}

.custom-file-upload {
    display: inline-block;
    padding: 12px 20px;
    background: #1C244B;
    color: white;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
    margin-top: 5px;
}

.custom-file-upload:hover {
    background: #161d3c;
}

.btn-submit {
    background-color: #1C244B;
    color: #fff;
    border: none;
    padding: 16px 32px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    border-radius: 30px;
    text-transform: uppercase;
    letter-spacing: 1px;
    position: relative;
    overflow: hidden;
    z-index: 1;
    box-shadow: 0 4px 10px rgba(28, 36, 75, 0.2);
}

.btn-submit:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: #161d3c;
    z-index: -2;
    border-radius: 30px;
}

.btn-submit:before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0%;
    height: 100%;
    background-color: #111631;
    transition: all 0.3s;
    z-index: -1;
    border-radius: 30px;
}

.btn-submit:hover:before {
    width: 100%;
}

.btn-submit:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

/* Social media icons */
.social-icons {
    display: flex;
    gap: 12px;
    margin-top: 15px;
    flex-wrap: wrap;
}

.social-icons a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: #1C244B;
    color: #fff;
    border-radius: 50%;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.social-icons a:before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(45deg, #1C244B, #2c365e);
    transition: all 0.3s ease;
    z-index: -1;
}

.social-icons a:hover {
    transform: translateY(-5px) rotate(10deg);
    box-shadow: 0 10px 20px rgba(28, 36, 75, 0.2);
}

.social-icons a:hover i {
    transform: scale(1.2);
}

.social-icons i {
    transition: transform 0.3s ease;
    position: relative;
    z-index: 2;
}

/* 社交媒体特定颜色（悬停时） */
.social-icons .instagram-link:hover {
    background: linear-gradient(45deg, #f09433, #e6683c, #dc2743, #cc2366, #bc1888);
}

.social-icons .facebook-link:hover {
    background-color: #3b5998;
}

.social-icons .tiktok-link:hover {
    background: linear-gradient(45deg, #000, #25F4EE, #FE2C55, #000);
}

.social-icons .whatsapp-link:hover {
    background-color: #25D366;
}

.social-icons .wechat-link:hover {
    background-color: #7BB32E;
}

.social-icons .youtube-link:hover {
    background-color: #FF0000;
}

.social-icons .email-link:hover {
    background-color: #D44638;
}

/* Map container styles */
.map-container {
    width: calc(100% + 130px);
    margin-right: -130px;
}

.google-map {
    width: 100%;
    height: 280px;
    border-radius: 8px;
    overflow: hidden;
    position: relative;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.contact-item.map-container h3 {
    margin-bottom: 12px;
    padding-right: 130px;
}

.google-map iframe {
    width: 100%;
    height: 100%;
    border: none;
    position: absolute;
    top: 0;
    left: 0;
    z-index: 1;
}

/* 地图备用显示样式 */
.map-fallback {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: #f9f9f9;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 15px;
    text-align: center;
    z-index: 0; /* 低于iframe的z-index，当iframe加载失败时显示 */
    border-radius: 8px;
}

.map-fallback .map-content {
    max-width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background-color: white;
    padding: 15px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.map-fallback .map-icon {
    margin-bottom: 6px;
}

.map-fallback .map-icon i {
    font-size: 1.8rem;
    color: #1C244B;
}

.map-fallback .map-title {
    font-size: 1.3rem;
    font-weight: 600;
    color: #1C244B;
    margin: 0 0 6px 0;
}

.map-fallback .map-address {
    color: #666;
    margin-bottom: 10px;
    line-height: 1.4;
}

.map-fallback .map-links {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
    margin-top: 8px;
}

.map-fallback .map-link {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 6px 12px;
    background-color: #f5f5f5;
    color: #444;
    border-radius: 4px;
    text-decoration: none;
    font-size: 0.9rem;
    transition: all 0.3s ease;
}

.map-fallback .map-link:hover {
    background-color: #1C244B;
    color: white;
    transform: translateY(-2px);
}

@media (max-width: 480px) {
    .map-fallback .map-links {
        flex-direction: column;
        width: 100%;
    }
    
    .map-fallback .map-link {
        width: 100%;
    }
}

/* FAQ section styles */
.faq-section {
    padding: 70px 0;
    background-color: #f9f9f9;
    position: relative;
    overflow: hidden;
}

.faq-section::before {
    content: '';
    position: absolute;
    width: 500px;
    height: 500px;
    background: linear-gradient(135deg, rgba(28, 36, 75, 0.05) 0%, rgba(28, 36, 75, 0.02) 100%);
    border-radius: 50%;
    top: -250px;
    right: -250px;
}

.faq-title {
    text-align: center;
    margin-bottom: 40px;
    position: relative;
}

.faq-title h2 {
    font-size: 2.2rem;
    color: #1C244B;
    margin-bottom: 15px;
    text-align: center;
}

.faq-title p {
    font-size: 1.1rem;
    color: #666;
    max-width: 700px;
    margin: 0 auto;
}

.faq-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(500px, 1fr));
    gap: 30px;
}

.faq-item {
    margin-bottom: 0;
    background-color: #fff;
    padding: 25px;
    box-shadow: 0 5px 25px rgba(0,0,0,0.05);
    border-radius: 5px;
    transition: all 0.3s ease;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.faq-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(0,0,0,0.1);
}

.faq-item::after {
    content: '';
    position: absolute;
    width: 5px;
    height: 0;
    background: #1C244B;
    top: 0;
    left: 0;
    transition: height 0.3s ease;
}

.faq-item:hover::after {
    height: 100%;
}

.faq-item h3 {
    font-size: 1.3rem;
    color: #1C244B;
    margin-bottom: 15px;
    font-weight: 600;
    transition: all 0.3s ease;
    padding-left: 15px;
}

.faq-item:hover h3 {
    padding-left: 20px;
}

.faq-item p {
    color: #666;
    font-size: 1rem;
    line-height: 1.6;
    padding-left: 15px;
    transition: all 0.3s ease;
}

.faq-item:hover p {
    padding-left: 20px;
}

/* Footer styles */
.site-footer {
    background-color: #1C244B;
    color: #FFFFFF;
    padding: 20px 0;
    margin-top: 10px;
    text-align: center;
}

.site-footer p {
    color: #ffffff !important;
    margin: 0 !important;
    font-size: 0.9rem !important;
}

/* Animation classes */
.fade-up {
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.6s ease;
}

.fade-up.active {
    opacity: 1;
    transform: translateY(0);
}

.stagger-item {
    opacity: 0;
    transform: translateY(20px);
}

/* 添加错误提示样式 - 修复页面向上顶问题的核心CSS */
.error-message {
    background-color: #fff0f0;
    color: #d32f2f;
    border-left: 4px solid #d32f2f;
    padding: 10px 15px;
    margin: 10px 0;
    font-size: 14px;
    border-radius: 0 4px 4px 0;
    display: none;
    animation: fadeIn 0.3s ease;
    /* 以下是为解决页面向上顶问题添加的CSS属性 */
    min-height: 0;            /* 初始最小高度为0，避免占用空间 */
    opacity: 0;               /* 初始透明度为0 */
    transition: opacity 0.3s ease, min-height 0.3s ease; /* 添加过渡效果使显示更平滑 */
    overflow: hidden;         /* 隐藏溢出内容 */
    max-height: 0;            /* 初始最大高度为0 */
}

.error-message.show {
    display: block;
    /* 显示错误消息时的样式 */
    min-height: 44px;         /* 设置固定高度避免内容变化导致页面跳动 */
    opacity: 1;               /* 完全显示 */
    max-height: 100px;        /* 允许足够的高度显示内容 */
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* 去除浏览器原生验证提示气泡 */
input:invalid, select:invalid, textarea:invalid {
    box-shadow: none !important;
}

/* Hide browser validation popup */
::-webkit-validation-bubble-message {
    display: none;
}

/* 移除chrome浏览器中的黄色自动填充背景 */
input:-webkit-autofill,
input:-webkit-autofill:hover, 
input:-webkit-autofill:focus,
textarea:-webkit-autofill,
textarea:-webkit-autofill:hover,
textarea:-webkit-autofill:focus,
select:-webkit-autofill,
select:-webkit-autofill:hover,
select:-webkit-autofill:focus {
    -webkit-box-shadow: 0 0 0px 1000px white inset;
    transition: background-color 5000s ease-in-out 0s;
}

/* 添加弹窗样式 */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal-container {
    background: #fff;
    padding: 30px;
    border-radius: 5px;
    width: 100%;
    max-width: 450px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
    text-align: center;
    transform: translateY(20px);
    transition: all 0.3s ease;
}

.modal-overlay.active .modal-container {
    transform: translateY(0);
}

.modal-icon {
    font-size: 3rem;
    color: #28a745;
    margin-bottom: 20px;
}

.modal-title {
    font-size: 1.5rem;
    color: #1C244B;
    margin-bottom: 15px;
}

.modal-text {
    color: #666;
    margin-bottom: 25px;
    line-height: 1.6;
}

.modal-btn {
    background: #1C244B;
    color: #fff;
    border: none;
    padding: 10px 25px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.modal-btn:hover {
    background: #2a3566;
}

/* Loading animation */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: #fff;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

.loading-overlay.hidden {
    opacity: 0;
    visibility: hidden;
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 3px solid rgba(28, 36, 75, 0.1);
    border-radius: 50%;
    border-top-color: #1C244B;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Contact hero section styles */
.contact-hero {
    height: 50vh;
    min-height: 400px;
    background-image: linear-gradient(#1b1b1b50, rgba(0, 0, 0, 0.85)), url('../images/contact/contact-hero.webp') !important;
    background-size: cover;
    background-position: center;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    text-align: center;
    position: relative;
}

.contact-hero::before,
.contact-hero::after {
    display: none !important;
}

.hero-content {
    max-width: 800px;
    padding: 0 20px;
    z-index: 2;
}

.contact-hero h1 {
    font-size: 3.2rem;
    font-weight: 700;
    margin-bottom: 20px;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.contact-hero p {
    font-size: 1.2rem;
    max-width: 600px;
    margin: 0 auto;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    width: 30px;
    height: 50px;
    border: 2px solid rgba(255, 255, 255, 0.7);
    border-radius: 15px;
    cursor: pointer;
    z-index: 2;
}

.scroll-indicator:before {
    content: '';
    position: absolute;
    top: 10px;
    left: 50%;
    width: 6px;
    height: 6px;
    margin-left: -3px;
    background-color: #fff;
    border-radius: 50%;
    animation: scroll 2s infinite;
}

@keyframes scroll {
    0% {
        transform: translateY(0);
        opacity: 1;
    }
    100% {
        transform: translateY(20px);
        opacity: 0;
    }
}

/* Responsive design */
@media (max-width: 992px) {
    .contact-grid {
        flex-direction: column;
        gap: 30px;
    }
    
    .contact-info, .contact-form {
        min-width: 100%;
        padding-left: 0;
        padding-right: 0;
        margin-left: 0;
        margin-right: 0;
    }
    
    .contact-form form {
        margin: 0 auto;
        right: 0;
    }
    
    .contact-form .btn-submit {
        float: none;
        width: 100%;
        max-width: 280px;
        margin-left: auto;
        margin-right: auto;
        display: block;
    }
    
    .form-row {
        flex-direction: column;
        gap: 12px;
    }

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

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

    .google-map {
        height: 250px;
    }

    .map-container {
        width: 100%;
        margin-right: 0;
    }
    
    .contact-item.map-container h3 {
        padding-right: 0;
    }
}

@media (min-width: 1600px) {
    .contact-info {
        margin-left: 100px;
    }
    
    .contact-form {
        margin-right: 150px;
    }
    
    .map-container {
        width: calc(100% + 160px);
        margin-right: -160px;
    }
}

@media (max-width: 1200px) and (min-width: 993px) {
    .map-container {
        width: calc(100% + 100px);
        margin-right: -100px;
    }
    
    .contact-item.map-container h3 {
        padding-right: 100px;
    }
}

@media (max-width: 768px) {
    .contact-section, .faq-section {
        padding: 40px 0;
    }
    
    .contact-hero {
        height: 40vh;
        min-height: 300px;
    }
    
    .contact-hero h1 {
        font-size: 2rem;
    }
    
    .contact-hero p {
        font-size: 1rem;
    }
    
    .faq-title h2 {
        font-size: 1.8rem;
    }
    
    .faq-item {
        padding: 20px;
    }

    .contact-info h2,
    .contact-form h2 {
        font-size: 1.6rem;
        margin-bottom: 15px;
    }
    
    .section-title-dash {
        width: 40px;
        margin-bottom: 15px;
    }
    
    .google-map {
        height: 220px;
    }
}

@media (max-width: 480px) {
    .contact-section, .faq-section {
        padding: 60px 0;
    }
    
    .contact-hero h1 {
        font-size: 1.8rem;
    }
    
    .btn-submit {
        width: 100%;
        max-width: 280px;
        margin-left: auto;
        margin-right: auto;
    }

    .social-icons {
        justify-content: center;
    }

    .faq-item {
        padding: 20px 15px;
    }
}

/* 表单验证相关样式 */
.form-control.is-invalid {
    border-color: #d32f2f;
    background-color: #fff0f0;
    box-shadow: 0 0 0 0.2rem rgba(220, 53, 69, 0.25);
}

.form-control.is-invalid:focus {
    border-color: #d32f2f;
    box-shadow: 0 0 0 0.2rem rgba(220, 53, 69, 0.25);
}

.text-danger {
    color: #d32f2f !important;
}

/* 确保错误信息正确显示 */
.error-message.show {
    display: block;
    min-height: 44px;
    opacity: 1;
    max-height: 100px;
    margin-top: 8px;
}

.contact-form .form-group {
    text-align: left;
}

.contact-form .btn-submit {
    float: none;
    margin-top: 20px;
    margin-left: auto;
    margin-right: auto;
    display: block;
    width: 200px;
    text-align: center;
}

/* 添加预加载屏幕样式 */
#preloader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: #ffffff;
    z-index: 9999;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: opacity 0.3s ease;
}

.preloader-spinner {
    width: 50px;
    height: 50px;
    border: 3px solid rgba(28, 36, 75, 0.1);
    border-radius: 50%;
    border-top-color: #1C244B;
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}