/* 通用样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Microsoft YaHei', 'PingFang SC', 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #ffffff 0%, #f8fafc 50%, #e2e8f0 100%);
    background-attachment: fixed;
    overflow-x: hidden;
}

/* 页面加载动画 */
.page-loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    opacity: 1;
    transition: opacity 0.5s ease;
}

.page-loader.fade-out {
    opacity: 0;
    pointer-events: none;
}

.loader-spinner {
    width: 60px;
    height: 60px;
    border: 4px solid rgba(255, 255, 255, 0.3);
    border-top: 4px solid white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* 滚动指示器 */
.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 0%;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    z-index: 1001;
    transition: width 0.1s ease;
}

/* 回到顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
    transform: translateY(100px);
    opacity: 0;
    transition: all 0.3s ease;
    z-index: 1000;
}

.back-to-top.show {
    transform: translateY(0);
    opacity: 1;
}

.back-to-top:hover {
    transform: translateY(-5px) scale(1.1);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.25);
}

/* 专业B2B配色方案 */
:root {
    --primary-color: #0866ff;
    --secondary-color: #2c7aff;
    --accent-color: #4a90ff;
    --text-primary: #2d3748;
    --text-secondary: #4a5568;
    --text-light: #718096;
    --border-color: #e2e8f0;
    --bg-light: #f7fafc;
    --bg-section: #ffffff;
    --shadow-light: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-medium: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-large: 0 10px 25px rgba(0, 0, 0, 0.15);
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 响应式布局基础设置 */
@media (max-width: 768px) {
    .container {
        padding: 0 10px;
    }
}

/* 占位图样式 */
.placeholder-image {
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-light);
    border-radius: 8px;
    transition: all 0.3s ease;
}


/* 顶部联系信息栏样式 */
.top-contact-bar {
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 8px 0;
    font-size: 0.9rem;
}

.top-contact-bar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.contact-info-nav {
    display: flex;
    gap: 20px;
}

.contact-info span {
    display: flex;
    align-items: center;
    gap: 5px;
}

.top-contact-bar .social-links {
    display: flex;
    gap: 15px;
}

.top-contact-bar .social-links a {
    color: white;
    font-size: 1.1rem;
    transition: all 0.3s ease;
}

.top-contact-bar .social-links a:hover {
    transform: translateY(-3px);
    text-shadow: 0 3px 5px rgba(0, 0, 0, 0.2);
}

/* 联系信息栏响应式样式 */
@media (max-width: 768px) {
    .top-contact-bar {
        padding: 5px 0;
    }
    
    .contact-info {
        gap: 10px;
        font-size: 0.8rem;
    }
    
    .top-contact-bar .social-links {
        gap: 10px;
    }
}

@media (max-width: 576px) {
    .top-contact-bar .container {
        flex-direction: column;
        gap: 5px;
    }
    
    .contact-info {
        justify-content: center;
    }
    
    .top-contact-bar .social-links {
        justify-content: center;
    }
}

/* 移动端导航样式 */
@media (max-width: 768px) {
    .menu-toggle {
        display: flex;
    }
    
    .nav {
        position: relative;
    }
    
    .nav-links {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        background: linear-gradient(135deg, rgba(255, 255, 255, 0.95), rgba(248, 250, 252, 0.95));
        box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
        padding: 1rem 0;
        border-radius: 0 0 12px 12px;
        transform: translateY(-20px);
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
        z-index: 1000;
    }
    
    .nav-links.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .dropdown-menu {
        position: static;
        width: 100%;
        box-shadow: none;
        opacity: 1;
        visibility: visible;
        transform: none;
        display: none;
        padding: 0;
        background: rgba(0, 0, 0, 0.03);
    }
    
    .dropdown.active .dropdown-menu {
        display: block;
    }
}

/* 头部导航样式 */
.header {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.95), rgba(248, 250, 252, 0.95));
    backdrop-filter: blur(20px);
    box-shadow: 0 4px 32px rgba(0, 0, 0, 0.08);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid rgba(255, 255, 255, 0.8);
    transition: all 0.3s ease;
}

.header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    font-size: 2rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-decoration: none;
    gap: 0.75rem;
    transition: all 0.3s ease;
}





.logo .placeholder-image {
    color: white;
    font-weight: bold;
    font-size: 1.2rem;
    border: none;
    width: 100px;

}

.nav-links {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: 1rem;
    color: #fff;
}
.nav-links a {
    color: #fff;
}

.nav-links li {
    margin: 0;
    position: relative;
}

/* 下拉菜单样式 */
.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    width: 200px;
    background: white;
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
    border-radius: 8px;
    padding: 0.5rem 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all 0.3s ease;
    z-index: 1000;
    list-style: none;
}

.dropdown-menu li {
    margin: 0;
}

.nav-links .dropdown-menu a {
    padding: 0.65rem 1.5rem;
    display: block;
    color: var(--text-primary);
    text-decoration: none;
    transition: all 0.3s ease;
    font-weight: 500;
    font-size: 0.8rem;
}

.dropdown-menu a:hover {
    background: linear-gradient(135deg, rgba(8, 102, 255, 0.05), rgba(74, 144, 255, 0.05));
    color: var(--primary-color);
    transform: translateX(5px);
}

.dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.nav-links a {
    display: block;
    padding: 0.75rem 1.5rem;
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 600;
    border-radius: 12px;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    background: transparent;
}

.nav-links a::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    transition: left 0.6s ease;
}

.nav-links a:hover::before {
    left: 100%;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    transition: all 0.3s ease;
    transform: translateX(-50%);
}

.nav-links a:hover {
    color: var(--primary-color);
    background: linear-gradient(135deg, rgba(8, 102, 255, 0.05), rgba(74, 144, 255, 0.05));
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.nav-links a:hover::after {
    width: 80%;
}

.nav-links a.active {
    color: var(--primary-color);
    background: linear-gradient(135deg, rgba(8, 102, 255, 0.1), rgba(74, 144, 255, 0.1));
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.nav-links a.active::after {
    width: 80%;
}

/* 移动端菜单 */
.menu-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    padding: 0.5rem;
    z-index: 1001;
}

.menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--primary-color);
    margin: 3px 0;
    transition: 0.3s;
    border-radius: 2px;
}

/* 汉堡菜单动画 */
.menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* 页脚样式 */
.footer {
    background: linear-gradient(135deg, var(--primary-color) 0%, #0555cc 50%, var(--secondary-color) 100%);
    color: white;
    padding: 4rem 0 2rem;
    margin-top: 6rem;
    position: relative;
    overflow: hidden;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
}

.footer::after {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 40%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.03) 0%, transparent 70%);
    pointer-events: none;
}

/* Footer Grid Layout */
.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    padding: 50px 0 30px;
    position: relative;
    z-index: 1;
}

.footer-col {
    position: relative;
}

.footer-section {
    position: relative;
}

.footer-contact {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-contact p {
    display: flex;
    align-items: center;
    gap: 10px;
}

.footer-contact i {
    width: 16px;
    text-align: center;
}

.footer-col h3,
.contact-info h3,
.footer-section h3 {
    color: white;
    margin-bottom: 1.5rem;
    font-size: 1.3rem;
    font-weight: 700;
    position: relative;
    padding-bottom: 0.5rem;
}

.footer-col h3::after,
.contact-info h3::after,
.footer-section h3::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 2px;
    background: linear-gradient(90deg, rgba(255, 255, 255, 0.8), transparent);
}

.contact-info p,
.footer-section p,
.footer-section a {
    margin-bottom: 0.75rem;
    color: rgba(255, 255, 255, 0.85);
    text-decoration: none;
    line-height: 1.8;
    transition: all 0.3s ease;
}

.footer-section a:hover {
    color: white;
    transform: translateX(5px);
    text-shadow: 0 0 8px rgba(255, 255, 255, 0.3);
}

.footer-section ul,
.footer-links {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-section ul li,
.footer-links li {
    margin-bottom: 0.75rem;
    position: relative;
    padding-left: 1rem;
}

.footer-section ul li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: rgba(255, 255, 255, 0.5);
    transition: all 0.3s ease;
}

.footer-section ul li:hover::before {
    color: white;
    transform: translateX(3px);
}

.footer-links li {
    padding-left: 0;
    margin-bottom: 10px;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.85);
    text-decoration: none;
    transition: all 0.3s ease;
}

.footer-links a:hover {
    color: white;
    padding-left: 5px;
}

.contact-info p {
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    color: rgba(255, 255, 255, 0.85);
}

.contact-info i {
    margin-right: 10px;
    color: rgba(255, 255, 255, 0.7);
    width: 20px;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.15);
    padding-top: 20px;
    margin-top: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: rgba(255, 255, 255, 0.7);
    position: relative;
}

.social-links {
    display: flex;
    gap: 15px;
}

.social-links a {
    color: rgba(255, 255, 255, 0.7);
    font-size: 1.2rem;
    transition: all 0.3s ease;
}

.social-links a:hover {
    color: white;
    transform: translateY(-3px);
}

.footer-bottom::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
}

/* 通用按钮样式 */
.btn {
    display: inline-block;
    padding: 0.75rem 2rem;
    background: var(--accent-color);
    color: white;
    text-decoration: none;
    border-radius: 6px;
    font-weight: 500;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    text-align: center;
}

.btn:hover {
    background: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

.btn-outline {
    background: transparent;
    color: var(--accent-color);
    border: 2px solid var(--accent-color);
}

.btn-outline:hover {
    background: var(--accent-color);
    color: white;
}

/* 卡片样式 */
.card {
    background: white;
    border-radius: 12px;
    box-shadow: var(--shadow-light);
    transition: all 0.3s ease;
    overflow: hidden;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-large);
}

/* 标题样式 */
h1, h2, h3, h4, h5, h6 {
    color: var(--text-primary);
    font-weight: 600;
    line-height: 1.3;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }