/* 全局样式和变量 */
:root {
    --primary-blue: #0d3b66;
    --secondary-blue: #1e6fa0;
    --accent-gold: #e0a800;
    --accent-orange: #e8743b;
    --light-gray: #f8f9fa;
    --dark-gray: #6c757d;
    --white: #ffffff;
    --black: #000000;
    --font-main: 'Microsoft YaHei', 'PingFang SC', 'Helvetica Neue', Arial, sans-serif;
}

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

body {
    font-family: var(--font-main);
    line-height: 1.6;
    color: #333;
    overflow-x: hidden;
}

/* 导航栏样式 */
.navbar {
    background: linear-gradient(135deg, var(--primary-blue), var(--secondary-blue));
    padding: 1rem 0;
    transition: all 0.3s ease;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.navbar.scrolled {
    padding: 0.5rem 0;
    background: rgba(13, 59, 102, 0.95);
    backdrop-filter: blur(10px);
}

.navbar-brand {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--white) !important;
}

.navbar-brand i {
    color: var(--accent-gold);
}

.navbar-nav .nav-link {
    color: var(--white) !important;
    font-weight: 500;
    margin: 0 0.5rem;
    transition: all 0.3s ease;
    position: relative;
}

.navbar-nav .nav-link:hover {
    color: var(--accent-gold) !important;
    transform: translateY(-2px);
}

.navbar-nav .nav-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: 0;
    left: 50%;
    background: var(--accent-gold);
    transition: all 0.3s ease;
    transform: translateX(-50%);
}

.navbar-nav .nav-link:hover::after {
    width: 100%;
}

.btn-consultation {
    background: var(--accent-orange) !important;
    border: 2px solid var(--accent-orange) !important;
    color: var(--white) !important;
    padding: 0.5rem 1.5rem !important;
    border-radius: 25px !important;
    font-weight: 600 !important;
    transition: all 0.3s ease !important;
}

.btn-consultation:hover {
    background: transparent !important;
    color: var(--accent-orange) !important;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(232, 116, 59, 0.3);
}

/* 英雄区样式 */
.hero-section {
    height: 100vh;
    background: linear-gradient(135deg, rgba(13, 59, 102, 0.8), rgba(30, 111, 160, 0.8)), url('images/bg.jpg');
    background-size: cover;
    background-position: center center;
    background-repeat: no-repeat;
    background-attachment: fixed;
    position: relative;
    display: flex;
    align-items: center;
    color: var(--white);
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(
        45deg,
        rgba(13, 59, 102, 0.1) 0%,
        transparent 50%,
        rgba(232, 116, 59, 0.1) 100%
    );
    animation: backgroundShine 8s ease-in-out infinite alternate;
}

@keyframes backgroundShine {
    0% { opacity: 0.3; }
    100% { opacity: 0.7; }
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.3);
    backdrop-filter: blur(1px);
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
    animation: fadeInUp 1s ease-out;
}

.hero-subtitle {
    margin-bottom: 1.5rem;
    animation: fadeInUp 1s ease-out 0.2s both;
}

.bg-gold {
    background: var(--accent-gold) !important;
    color: var(--white) !important;
    padding: 0.5rem 1rem;
    border-radius: 25px;
    font-weight: 600;
    margin: 0.2rem;
    display: inline-block;
}

.hero-description {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.9;
    animation: fadeInUp 1s ease-out 0.4s both;
}

.hero-buttons {
    animation: fadeInUp 1s ease-out 0.6s both;
}

.btn-primary {
    background: var(--accent-orange);
    border: 2px solid var(--accent-orange);
    padding: 1rem 2rem;
    font-weight: 600;
    border-radius: 50px;
    transition: all 0.3s ease;
}

.btn-primary:hover {
    background: transparent;
    color: var(--accent-orange);
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(232, 116, 59, 0.3);
}

.btn-outline-light {
    border: 2px solid var(--white);
    padding: 1rem 2rem;
    font-weight: 600;
    border-radius: 50px;
    transition: all 0.3s ease;
}

.btn-outline-light:hover {
    background: var(--white);
    color: var(--primary-blue);
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(255, 255, 255, 0.3);
}

/* 动画关键帧 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 公共区域样式 */
.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-blue);
    margin-bottom: 1rem;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-gold), var(--accent-orange));
    border-radius: 2px;
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--dark-gray);
    max-width: 600px;
    margin: 0 auto;
}

/* 服务区域样式 */
.services-section {
    padding: 6rem 0;
    background: var(--white);
}

.service-card {
    background: var(--white);
    border-radius: 15px;
    padding: 2.5rem 1.5rem;
    text-align: center;
    box-shadow: 0 5px 25px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
    height: 100%;
    border: 1px solid rgba(0,0,0,0.05);
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0,0,0,0.15);
}

.service-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--secondary-blue), var(--accent-orange));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    position: relative;
    overflow: hidden;
}

.service-icon::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(45deg, transparent, rgba(255,255,255,0.2), transparent);
    animation: shine 3s infinite;
}

@keyframes shine {
    0% { transform: translateX(-100%) translateY(-100%) rotate(45deg); }
    100% { transform: translateX(100%) translateY(100%) rotate(45deg); }
}

.service-icon i {
    font-size: 2rem;
    color: var(--white);
}

.service-card h4 {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--primary-blue);
    margin-bottom: 0.5rem;
}

.service-card p {
    color: var(--dark-gray);
    margin-bottom: 1.5rem;
}

.service-features {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    justify-content: center;
}

.feature-tag {
    background: var(--light-gray);
    color: var(--primary-blue);
    padding: 0.3rem 0.8rem;
    border-radius: 15px;
    font-size: 0.85rem;
    font-weight: 500;
    border: 1px solid var(--accent-gold);
}

/* 优势区域样式 */
.advantages-section {
    padding: 6rem 0;
    background: var(--light-gray);
}

.advantage-card {
    background: var(--white);
    border-radius: 15px;
    padding: 3rem 2rem;
    box-shadow: 0 5px 25px rgba(0,0,0,0.08);
    transition: all 0.3s ease;
    height: 100%;
}

.advantage-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0,0,0,0.12);
}

.advantage-icon {
    width: 100px;
    height: 100px;
    background: linear-gradient(135deg, var(--primary-blue), var(--secondary-blue));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 2rem;
    position: relative;
}

.advantage-icon i {
    font-size: 2.5rem;
    color: var(--white);
}

.advantage-card h4 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-blue);
    margin-bottom: 0.5rem;
}

.advantage-card h5 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--accent-orange);
    margin-bottom: 1rem;
}

.advantage-card p {
    color: var(--dark-gray);
    line-height: 1.8;
}

/* 流程区域样式 */
.process-section {
    padding: 6rem 0;
    background: var(--white);
}

.process-timeline {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1000px;
    margin: 0 auto;
    position: relative;
    /* 确保元素始终可见 */
    opacity: 1;
    visibility: visible;
}

.process-step {
    text-align: center;
    flex: 1;
    position: relative;
    z-index: 2;
    /* 确保每个步骤都可见 */
    opacity: 1;
    visibility: visible;
    /* 添加动画 */
    animation: processStepIn 0.8s ease forwards;
}

.process-step:nth-child(1) { animation-delay: 0.1s; }
.process-step:nth-child(3) { animation-delay: 0.3s; }
.process-step:nth-child(5) { animation-delay: 0.5s; }
.process-step:nth-child(7) { animation-delay: 0.7s; }

@keyframes processStepIn {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.step-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--accent-gold), var(--accent-orange));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
    position: relative;
    box-shadow: 0 5px 20px rgba(224, 168, 0, 0.3);
    transition: all 0.3s ease;
}

.step-icon:hover {
    transform: translateY(-5px) scale(1.1);
    box-shadow: 0 10px 30px rgba(224, 168, 0, 0.4);
}

.step-icon i {
    font-size: 1.8rem;
    color: var(--white);
}

.process-step h4 {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--primary-blue);
    margin-bottom: 0.5rem;
}

.process-step p {
    color: var(--dark-gray);
    font-size: 0.9rem;
}

.process-connector {
    position: absolute;
    top: 40px;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-gold), var(--accent-orange));
    z-index: 1;
    /* 添加绘制动画 */
    animation: drawLine 1.5s ease 0.2s forwards;
    transform-origin: left;
    transform: scaleX(0);
}

@keyframes drawLine {
    to {
        transform: scaleX(1);
    }
}

/* 客户见证区域样式 */
.testimonials-section {
    padding: 6rem 0;
    background: var(--light-gray);
}

.brands-wall {
    padding: 3rem 0;
}

.brand-logo {
    text-align: center;
    padding: 1rem;
    background: var(--white);
    border-radius: 10px;
    box-shadow: 0 3px 15px rgba(0,0,0,0.05);
    transition: all 0.3s ease;
    opacity: 0.7;
    margin-bottom: 1rem;
}

.brand-logo:hover {
    opacity: 1;
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.1);
}

.brand-logo i {
    font-size: 2rem;
    color: var(--dark-gray);
    margin-bottom: 0.5rem;
    display: block;
}

.brand-logo span {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--primary-blue);
}

.testimonial-card {
    background: var(--white);
    border-radius: 20px;
    padding: 3rem;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    position: relative;
}

.quote-icon {
    font-size: 3rem;
    color: var(--accent-gold);
    position: absolute;
    top: 2rem;
    left: 2rem;
    opacity: 0.3;
}

.testimonial-content p {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--dark-gray);
    margin: 2rem 0;
    font-style: italic;
}

.testimonial-author {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 1.5rem;
    border-top: 1px solid var(--light-gray);
}

.author-info h5 {
    font-weight: 600;
    color: var(--primary-blue);
    margin-bottom: 0.2rem;
}

.author-info p {
    color: var(--dark-gray);
    font-size: 0.9rem;
    margin: 0;
}

.rating i {
    color: var(--accent-gold);
    margin-right: 0.2rem;
}

/* 页脚样式 */
.footer-section {
    background: linear-gradient(135deg, var(--primary-blue), var(--secondary-blue));
    color: var(--white);
}

.footer-section h5 {
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: var(--accent-gold);
}

.footer-list {
    list-style: none;
    padding: 0;
}

.footer-list li {
    margin-bottom: 0.8rem;
    opacity: 0.9;
    transition: all 0.3s ease;
}

.footer-list li:hover {
    opacity: 1;
    transform: translateX(5px);
}

.footer-list a {
    color: var(--white);
    text-decoration: none;
    transition: all 0.3s ease;
}

.footer-list a:hover {
    color: var(--accent-gold);
}

.qr-code {
    display: inline-flex;
    align-items: center;
    background: rgba(255,255,255,0.1);
    padding: 0.8rem 1.5rem;
    border-radius: 10px;
    transition: all 0.3s ease;
}

.qr-code:hover {
    background: rgba(255,255,255,0.2);
    transform: scale(1.05);
}

.qr-code i {
    font-size: 1.5rem;
    color: var(--accent-gold);
    margin-right: 0.5rem;
}

.copyright {
    color: rgba(255,255,255,0.8);
    margin: 0;
}

.website-info {
    color: rgba(255,255,255,0.8);
    margin: 0;
    font-weight: 500;
}

/* 模态框样式 */
.modal-content {
    border-radius: 15px;
    border: none;
    box-shadow: 0 20px 50px rgba(0,0,0,0.2);
}

.modal-header {
    background: linear-gradient(135deg, var(--primary-blue), var(--secondary-blue));
    color: var(--white);
    border-radius: 15px 15px 0 0;
    border-bottom: none;
}

.modal-title {
    font-weight: 600;
}

.btn-close {
    filter: invert(1);
}

.form-label {
    font-weight: 600;
    color: var(--primary-blue);
}

.form-control:focus,
.form-select:focus {
    border-color: var(--accent-orange);
    box-shadow: 0 0 0 0.2rem rgba(232, 116, 59, 0.25);
}

/* 返回顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 50px;
    height: 50px;
    background: var(--accent-orange);
    border: none;
    border-radius: 50%;
    color: var(--white);
    font-size: 1.2rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 1000;
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background: var(--primary-blue);
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(232, 116, 59, 0.3);
}

/* 响应式设计 */
@media (max-width: 992px) {
    .hero-title {
        font-size: 2.5rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .process-timeline {
        flex-direction: column;
        gap: 3rem;
        padding: 2rem 0;
    }
    
    .process-step {
        width: 100%;
        max-width: 300px;
        margin: 0 auto;
    }
    
    .process-connector {
        display: none;
    }
    
    /* 移动端垂直连接线 */
    .process-step:not(:last-child)::after {
        content: '';
        position: absolute;
        bottom: -1.5rem;
        left: 50%;
        transform: translateX(-50%);
        width: 2px;
        height: 3rem;
        background: linear-gradient(180deg, var(--accent-gold), var(--accent-orange));
        z-index: 1;
        animation: drawVerticalLine 0.8s ease forwards;
        animation-delay: 0.5s;
        transform-origin: top;
        transform: translateX(-50%) scaleY(0);
    }
    
    @keyframes drawVerticalLine {
        to {
            transform: translateX(-50%) scaleY(1);
        }
    }
    
    .testimonial-card {
        padding: 2rem;
    }
    
    .testimonial-author {
        flex-direction: column;
        text-align: center;
        gap: 1rem;
    }
    
    .hero-section {
        background-attachment: scroll; /* 移动端使用scroll而非fixed */
    }
}

@media (max-width: 768px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-description {
        font-size: 1rem;
    }
    
    .service-card,
    .advantage-card {
        margin-bottom: 2rem;
    }
    
    .hero-subtitle {
        display: none; /* 移动端隐藏ISO认证等标签 */
    }
    
    .hero-buttons {
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 1rem;
        margin-top: 2rem; /* 增加顶部间距 */
    }
    
    .hero-buttons .btn {
        width: 250px;
        max-width: 90%;
    }
    
    .footer-section .col-lg-4 {
        margin-bottom: 2rem;
        text-align: center;
    }
}

@media (max-width: 576px) {
    .hero-section {
        padding: 0 1rem;
    }
    
    .service-card,
    .advantage-card,
    .testimonial-card {
        padding: 1.5rem;
    }
    
    .quote-icon {
        font-size: 2rem;
        top: 1rem;
        left: 1rem;
    }
    
    .brands-wall .col-6 {
        margin-bottom: 1rem;
    }
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--light-gray);
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(var(--primary-blue), var(--secondary-blue));
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(var(--secondary-blue), var(--accent-orange));
}

/* 加载动画 */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* 样本展示区域样式 */
.samples-section {
    padding: 6rem 0;
    background: var(--white);
}

.sample-card {
    background: var(--white);
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 5px 25px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
    height: 100%;
}

.sample-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 40px rgba(0,0,0,0.15);
}

.sample-image {
    position: relative;
    overflow: hidden;
    aspect-ratio: 4/3;
}

.sample-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: all 0.3s ease;
}

.sample-card:hover .sample-image img {
    transform: scale(1.1);
}

.sample-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(13, 59, 102, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: all 0.3s ease;
}

.sample-card:hover .sample-overlay {
    opacity: 1;
}

.sample-info {
    text-align: center;
    color: var(--white);
    padding: 1rem;
}

.sample-info h5 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--white);
}

.sample-info p {
    margin-bottom: 1rem;
    opacity: 0.9;
}

/* 微信二维码弹窗样式 */
.wechat-qr-container {
    padding: 1rem;
}

.wechat-qr-img {
    width: 200px;
    height: 200px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.wechat-id-box {
    background: var(--light-gray);
    padding: 1rem;
    border-radius: 10px;
    border: 2px dashed var(--accent-gold);
    display: inline-block;
}

.wechat-id-label {
    font-weight: 600;
    color: var(--primary-blue);
}

.wechat-id {
    font-weight: 700;
    color: var(--accent-orange);
    font-family: 'Courier New', monospace;
    font-size: 1.1rem;
}

#copyWechatId {
    transition: all 0.3s ease;
}

#copyWechatId:hover {
    transform: scale(1.05);
}

/* 移动端底部悬浮菜单 */
.mobile-bottom-menu {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(135deg, var(--primary-blue), var(--secondary-blue));
    box-shadow: 0 -2px 20px rgba(0,0,0,0.1);
    z-index: 999;
    display: flex;
    justify-content: space-evenly;
    padding: 0.5rem 0;
    backdrop-filter: blur(10px);
}

.bottom-menu-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 0.5rem;
    color: var(--white);
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s ease;
    flex: 1;
    position: relative;
}

.bottom-menu-item:hover {
    color: var(--accent-gold);
    transform: translateY(-2px);
}

.bottom-menu-item i {
    font-size: 1.2rem;
    margin-bottom: 0.2rem;
}

.bottom-menu-item span {
    font-size: 0.8rem;
    font-weight: 500;
}

.bottom-menu-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--accent-gold);
    transition: all 0.3s ease;
}

.bottom-menu-item:hover::before {
    width: 80%;
}

/* 为移动端底部菜单添加页面底部间距 */
@media (max-width: 767px) {
    body {
        padding-bottom: 70px;
    }
    
    .back-to-top {
        bottom: 80px;
    }
}

/* 常见问题区域样式 */
.faq-section {
    padding: 6rem 0;
    background: var(--light-gray);
}

.faq-item {
    margin-bottom: 1rem;
    border: none;
    border-radius: 15px;
    box-shadow: 0 3px 15px rgba(0,0,0,0.05);
    overflow: hidden;
}

.faq-item .accordion-button {
    background: var(--white);
    border: none;
    padding: 1.5rem;
    font-weight: 600;
    color: var(--primary-blue);
    border-radius: 15px;
    transition: all 0.3s ease;
    position: relative;
}

.faq-item .accordion-button:not(.collapsed) {
    background: linear-gradient(135deg, var(--primary-blue), var(--secondary-blue));
    color: var(--white);
    box-shadow: none;
}

.faq-item .accordion-button:not(.collapsed) i {
    color: var(--accent-gold);
}

.faq-item .accordion-button:hover {
    background: var(--light-gray);
    transform: translateY(-2px);
}

.faq-item .accordion-button:not(.collapsed):hover {
    background: linear-gradient(135deg, var(--secondary-blue), var(--primary-blue));
}

.faq-item .accordion-button::after {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%23e0a800'%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");
    transform: scale(1.2);
    transition: all 0.3s ease;
}

.faq-item .accordion-button:not(.collapsed)::after {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%23e0a800'%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");
    transform: rotate(180deg) scale(1.2);
}

.faq-item .accordion-body {
    background: var(--white);
    border-top: 1px solid rgba(13, 59, 102, 0.1);
    padding: 1.5rem;
    color: var(--dark-gray);
    line-height: 1.8;
}

.faq-item .accordion-body br {
    margin-bottom: 0.5rem;
}

/* FAQ动画效果 */
.faq-item {
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.6s ease forwards;
}

.faq-item:nth-child(1) { animation-delay: 0.1s; }
.faq-item:nth-child(2) { animation-delay: 0.2s; }
.faq-item:nth-child(3) { animation-delay: 0.3s; }
.faq-item:nth-child(4) { animation-delay: 0.4s; }
.faq-item:nth-child(5) { animation-delay: 0.5s; }
.faq-item:nth-child(6) { animation-delay: 0.6s; }

/* 复制成功提示动画 */
.copy-success {
    animation: copySuccess 0.5s ease;
    background-color: #28a745 !important;
    border-color: #28a745 !important;
    color: white !important;
}

@keyframes copySuccess {
    0% { transform: scale(1); }
    50% { transform: scale(1.1); background-color: #20c997; }
    100% { transform: scale(1); }
}

/* 微信跳转确认对话框样式 */
#wechatRedirectModal .modal-content {
    border: none;
    border-radius: 20px;
    box-shadow: 0 15px 50px rgba(0,0,0,0.15);
    overflow: hidden;
}

#wechatRedirectModal .modal-header {
    border-bottom: none;
    border-radius: 20px 20px 0 0;
    padding: 2rem 2rem 1rem;
    background: linear-gradient(135deg, #28a745, #20c997);
}

#wechatRedirectModal .modal-body {
    padding: 2rem;
    background: linear-gradient(135deg, #f8f9fa, #ffffff);
}

#wechatRedirectModal .fab.fa-weixin {
    animation: wechatPulse 2s ease-in-out infinite;
    filter: drop-shadow(0 4px 8px rgba(40, 167, 69, 0.3));
}

@keyframes wechatPulse {
    0%, 100% {
        transform: scale(1);
        opacity: 0.8;
    }
    50% {
        transform: scale(1.1);
        opacity: 1;
        filter: drop-shadow(0 6px 12px rgba(40, 167, 69, 0.4));
    }
}

#wechatRedirectModal .btn-success {
    background: linear-gradient(135deg, #28a745, #20c997);
    border: none;
    border-radius: 30px;
    padding: 1rem 2.5rem;
    font-weight: 600;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(40, 167, 69, 0.3);
}

#wechatRedirectModal .btn-success:hover {
    background: linear-gradient(135deg, #218838, #1e7e34);
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(40, 167, 69, 0.4);
}

#wechatRedirectModal .btn-outline-secondary {
    border-radius: 30px;
    border-width: 2px;
    border-color: #6c757d;
    padding: 1rem 2.5rem;
    font-weight: 600;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    color: #6c757d;
}

#wechatRedirectModal .btn-outline-secondary:hover {
    background: #6c757d;
    border-color: #6c757d;
    color: white;
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(108, 117, 125, 0.3);
}

#wechatRedirectModal .modal-title {
    font-weight: 700;
    font-size: 1.4rem;
}

#wechatRedirectModal .modal-body p {
    font-size: 1.1rem;
    margin-bottom: 1rem;
}

#wechatRedirectModal .modal-body strong {
    color: #28a745;
    font-weight: 700;
}

/* 性能优化 - 将动画移至GPU */
.service-card,
.advantage-card,
.brand-logo,
.btn,
.back-to-top,
.sample-card,
.bottom-menu-item,
.faq-item,
.accordion-button {
    will-change: transform;
    transform: translateZ(0);
}

/* 打印样式 */
@media print {
    .navbar,
    .back-to-top,
    .modal {
        display: none !important;
    }
    
    .hero-section {
        height: auto;
        padding: 2rem 0;
    }
    
    body {
        color: #000;
        background: #fff;
    }
}