/* Windows 11 风格变量 */
:root {
    --primary-color: #0078d4;
    --secondary-color: #5d5aec;
    --accent-color: #ffb900;
    --dark-bg: #1d1d1d;
    --card-bg: #f3f3f3;
    --surface-color: #ffffff;
    --text-primary: #000000;
    --text-secondary: #616161;
    --border-radius: 8px;
    --border-radius-lg: 12px;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 28px rgba(0, 0, 0, 0.16);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
}

body {
    line-height: 1.6;
    color: var(--text-primary);
    background-color: #fafafa;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

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

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 24px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    font-weight: 600;
    font-size: 14px;
    cursor: pointer;
    transition: var(--transition);
    gap: 8px;
}

.btn:hover {
    background-color: #106ebe;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-outline {
    background-color: transparent;
    border: 1px solid var(--primary-color);
    color: var(--primary-color);
}

.btn-outline:hover {
    background-color: rgba(0, 120, 212, 0.1);
}

/* 头部导航 */
header {
    background-color: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    transition: var(--transition);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 20px;
    position: relative;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    flex: 1;
}

.logo img {
    height: 45px;
}

.logo-text {
    flex: 1;
    max-width: 300px;
}

.logo-text h1 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    transform: skewX(-10deg);
    display: inline-block;
    position: relative; /* 为伪元素定位提供参照 */
    padding-right: 15px; /* 为®符号腾出空间 */
}

.logo-text h1::after {
    content: "®";
    font-size: 0.9rem; /* 更小的字号 */
    color: #999; /* 灰色 */
    position: absolute;
    top: +5px; /* 调整垂直位置，负值向上 */
    right: 0; /* 紧靠右侧 */
    line-height: 1;
}

.logo-text p {
    font-size: 0.7rem;
    color: var(--text-secondary);
    white-space: nowrap;
}

.desktop-nav {
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 20px;
    font-size: 1.2rem;
}

.nav-links {
    display: flex;
    gap: 20px;
    align-items: center;
}

.nav-item {
    position: relative;
}

.nav-link {
    font-weight: 500;
    transition: var(--transition);
    padding: 8px 0;
    display: block;
}

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

.nav-underline {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary-color);
    transition: width 0.3s ease;
}

.nav-item:hover .nav-underline {
    width: 100%;
}

/* 产品中心下拉菜单样式 */
.nav-item.dropdown {
    position: relative;
}

.nav-item.dropdown .nav-link {
    display: flex;
    align-items: center;
    gap: 6px;
}

.dropdown-icon {
    font-size: 0.75rem;
    transition: transform 0.3s;
}

.nav-item.dropdown:hover .dropdown-icon {
    transform: rotate(180deg);
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 240px;
    background: white;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    padding: 8px 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    z-index: 1001;
    border: 1px solid rgba(0, 0, 0, 0.08);
}

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

.dropdown-item {
    display: block;
    position: relative;
}

.dropdown-item > a,
.dropdown-item.all-products {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    padding: 10px 20px;
    color: var(--text-secondary);
    transition: var(--transition);
    font-size: 0.95rem;
    gap: 10px;
}

.dropdown-item > a i:first-child,
.dropdown-item.all-products i:first-child {
    width: 20px;
    color: var(--primary-color);
}

.dropdown-item > a:hover,
.dropdown-item.all-products:hover {
    background-color: rgba(0, 120, 212, 0.05);
    color: var(--primary-color);
}

.dropdown-item.has-submenu {
    position: relative;
}

.submenu-icon {
    font-size: 0.7rem;
    margin-left: auto;
    color: var(--text-secondary);
}

.submenu {
    position: absolute;
    top: 0;
    left: 100%;
    min-width: 200px;
    background: white;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    padding: 8px 0;
    opacity: 0;
    visibility: hidden;
    transform: translateX(-10px);
    transition: all 0.3s ease;
    z-index: 1002;
    border: 1px solid rgba(0, 0, 0, 0.08);
}

.dropdown-item.has-submenu:hover .submenu {
    opacity: 1;
    visibility: visible;
    transform: translateX(0);
}

.submenu-item {
    display: flex;
    align-items: center;
    padding: 8px 20px;
    color: var(--text-secondary);
    transition: var(--transition);
    font-size: 0.9rem;
    gap: 10px;
}

.submenu-item i {
    width: 18px;
    font-size: 0.8rem;
    color: var(--primary-color);
}

.submenu-item:hover {
    background-color: rgba(0, 120, 212, 0.05);
    color: var(--primary-color);
    padding-left: 25px;
}

.lang-selector select {
    padding: 6px 12px;
    border-radius: var(--border-radius);
    border: 1px solid rgba(0, 0, 0, 0.2);
    background-color: transparent;
    font-size: 0.9rem;
    cursor: pointer;
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 1.8rem;
    cursor: pointer;
    color: var(--primary-color);
    width: 48px;
    height: 48px;
    border-radius: var(--border-radius);
}

/* 页面横幅 */
.page-banner {
     background: linear-gradient(rgba(0, 120, 212, 0.7), rgba(0, 120, 212, 0)), url('img/ph2.jpg');
    background-size: cover;
    background-position: center;
    color: white;
    padding: 100px 0 80px;
    text-align: center;
    margin-top: 70px;
    position: relative;
    overflow: hidden;
    min-height: 280px;
    display: flex;
    align-items: center;
}

.page-banner h1 {
    font-size: 3rem;
    margin-bottom: 20px;
    text-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.page-banner p {
    font-size: 1.1rem;
    max-width: 700px;
    margin: 0 auto;
    opacity: 0.95;
    text-shadow: 0 1px 2px rgba(0,0,0,0.1);
}

/* 主要内容区域 */
.main-content {
    max-width: 1200px;
    margin: 60px auto;
    padding: 0 20px;
}

/* 联系我们区块 */
.contact-section {
    background: white;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    margin-bottom: 40px;
}

.contact-wrapper {
    padding: 40px;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
}

/* 联系信息 */
.contact-info-box {
    padding: 30px;
    background: #f8f9fa;
    border-radius: var(--border-radius-lg);
}

.info-title {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-bottom: 25px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--accent-color);
    display: inline-block;
}

.info-item {
    display: flex;
    align-items: flex-start;
    gap: 15px;
    margin-bottom: 25px;
    padding: 15px;
    background: white;
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.info-item:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-sm);
}

.info-icon {
    width: 45px;
    height: 45px;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    flex-shrink: 0;
}

.info-content h4 {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 5px;
    font-weight: 500;
}

.info-content p {
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-primary);
}

.info-content a {
    color: var(--primary-color);
    transition: var(--transition);
}

.info-content a:hover {
    color: var(--accent-color);
}

/* 客服图片 */
.contact-image-box {
    padding: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.contact-image-box img {
    width: 100%;
    max-width: 600px;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    transition: transform 0.3s ease;
}

.contact-image-box img:hover {
    transform: scale(1.02);
}

/* 页脚 */
footer {
    background-color: var(--dark-bg);
    color: white;
    padding: 60px 0 30px;
    margin-top: 60px;
}

.footer-grid {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-col h3 {
    font-size: 1.2rem;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 10px;
}

.footer-col h3:after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 40px;
    height: 2px;
    background-color: var(--accent-color);
}

.footer-col p {
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.6;
    margin-bottom: 15px;
}

.footer-col ul li {
    margin-bottom: 12px;
}

.footer-col ul li a {
    color: rgba(255, 255, 255, 0.7);
    transition: var(--transition);
}

.footer-col ul li a:hover {
    color: var(--accent-color);
    transform: translateX(5px);
    display: inline-block;
}

.footer-col ul li i {
    width: 25px;
    color: var(--accent-color);
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.85rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .mobile-menu-btn {
        display: flex;
        align-items: center;
        justify-content: center;
    }
    .desktop-nav {
        position: absolute;
        top: 100%;
        right: 0;
        width: 280px;
        background-color: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(20px);
        box-shadow: var(--shadow-lg);
        border-radius: 0 0 var(--border-radius-lg) var(--border-radius-lg);
        padding: 20px;
        transform: translateY(-20px);
        opacity: 0;
        visibility: hidden;
        flex-direction: column;
        align-items: flex-start;
        z-index: 1000;
    }
    .desktop-nav.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    .nav-links {
        flex-direction: column;
        gap: 16px;
        width: 100%;
    }
    .dropdown-menu {
        position: static;
        box-shadow: none;
        padding-left: 20px;
        opacity: 1;
        visibility: visible;
        transform: none;
        display: none;
        background: transparent;
        border: none;
    }
    .nav-item.dropdown:hover .dropdown-menu {
        display: block;
    }
    .submenu {
        position: static;
        box-shadow: none;
        padding-left: 20px;
        opacity: 1;
        visibility: visible;
        transform: none;
        display: none;
    }
    .dropdown-item.has-submenu:hover .submenu {
        display: block;
    }
    .lang-selector {
        margin-top: 15px;
        width: 100%;
    }
    .lang-selector select {
        width: 100%;
    }
    .logo-text {
        max-width: 200px;
    }
    .logo-text h1 {
        font-size: 1.1rem;
        white-space: normal;
    }
    .logo-text p {
        font-size: 0.6rem;
        white-space: normal;
    }
    .page-banner {
        min-height: 200px;
        padding: 80px 0 60px;
        margin-top: 65px;
    }
    .page-banner h1 {
        font-size: 2rem;
    }
    .page-banner p {
        font-size: 0.9rem;
    }
    .contact-wrapper {
        padding: 25px;
    }
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    .contact-info-box {
        padding: 20px;
    }
    .contact-image-box img {
        max-width: 100%;
    }
}

@media (max-width: 576px) {
    .logo img {
        height: 35px;
    }
    .logo-text {
        max-width: 150px;
    }
    .logo-text h1 {
        font-size: 0.9rem;
    }
    .logo-text p {
        display: none;
    }
    .page-banner h1 {
        font-size: 1.6rem;
    }
    .contact-wrapper {
        padding: 20px;
    }
    .info-item {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    .info-icon {
        margin-bottom: 10px;
    }
}