:root {
    --primary-color: #d32f2f;
    --secondary-color: #8b4513;
    --accent-color: #ff6f00;
    --dark-bg: #1a1a1a;
    --light-bg: #f5f5f5;
    --text-dark: #333;
    --text-light: #fff;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Noto Sans SC', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    overflow-x: hidden;
}

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

/* 语言切换按钮 */
.nav-lang {
    display: flex;
    align-items: center;
}

.lang-toggle {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 8px 18px;
    border-radius: 20px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    font-weight: 600;
    box-shadow: 0 2px 10px rgba(211, 47, 47, 0.2);
    transition: var(--transition);
}

.lang-toggle:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(211, 47, 47, 0.3);
}

/* 侧边悬浮栏 */
.floating-sidebar {
    position: fixed;
    right: 30px;
    top: 50%;
    transform: translateY(-50%);
    z-index: 999;
    display: flex;
    flex-direction: column;
    gap: 15px;
    transition: right 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 收缩停靠状态 - WhatsApp侧边栏 */
.floating-sidebar.docked {
    right: -14px;
}

.floating-sidebar.docked .whatsapp-btn {
    border-radius: 30px 0 0 30px;
    width: 74px;
    padding-right: 14px;
    animation: none;
    box-shadow: -2px 2px 12px rgba(37,211,102,0.35);
}

.floating-sidebar.docked .whatsapp-btn:hover {
    transform: translateX(-6px);
}

/* 展开提示条（收缩时显示） */
.floating-sidebar .dock-hint {
    display: none;
    position: absolute;
    right: 60px;
    top: 50%;
    transform: translateY(-50%);
    background: #25D366;
    color: white;
    font-size: 12px;
    font-weight: 600;
    padding: 4px 10px;
    border-radius: 10px;
    white-space: nowrap;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.3s;
}

.floating-sidebar.docked:hover .dock-hint {
    opacity: 1;
}

.whatsapp-btn {
    width: 60px;
    height: 60px;
    background: #25D366;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 30px;
    text-decoration: none;
    box-shadow: var(--shadow);
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    animation: pulse 2s infinite;
    position: relative;
}

.whatsapp-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 30px rgba(37, 211, 102, 0.4);
}

@keyframes pulse {
    0%, 100% {
        box-shadow: 0 0 0 0 rgba(37, 211, 102, 0.7);
    }
    50% {
        box-shadow: 0 0 0 15px rgba(37, 211, 102, 0);
    }
}

/* 导航栏 */
.navbar {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 998;
    padding: 15px 0;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition);
}

.logo:hover {
    opacity: 0.8;
}

.logo-img {
    width: 40px;
    height: 40px;
    object-fit: contain;
}

/* 移动端菜单按钮 */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    z-index: 1001;
    position: relative;
}

.mobile-menu-toggle span {
    width: 28px;
    height: 3px;
    background: var(--primary-color);
    border-radius: 2px;
    transition: var(--transition);
    display: block;
}

.mobile-menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(8px, 8px);
}

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

.mobile-menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav-menu > li {
    position: relative;
}

.nav-menu a {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    transition: var(--transition);
    position: relative;
    display: block;
    padding: 5px 0;
}

.nav-menu > li > a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: var(--transition);
}

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

.nav-menu > li > a:hover::after {
    width: 100%;
}

/* 下拉菜单 */
.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: white;
    min-width: 220px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
    border-radius: 8px;
    padding: 10px 0;
    list-style: none;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: var(--transition);
    z-index: 1000;
}

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

.dropdown-menu li {
    padding: 0;
}

.dropdown-menu a {
    padding: 12px 20px;
    color: var(--text-dark);
    white-space: nowrap;
}

.dropdown-menu a:hover {
    background: var(--light-bg);
    color: var(--primary-color);
}

/* 主横幅 */
.hero {
    height: 650px;
    min-height: 500px;
    background: linear-gradient(135deg, #d32f2f 0%, #ff6f00 100%);
    background-image: url('images/hero-banner.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.4);
    z-index: 1;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 30% 50%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: white;
    animation: fadeInUp 1s ease-out;
}

.hero-title {
    font-size: 56px;
    font-weight: 800;
    margin-bottom: 20px;
    text-shadow: 2px 2px 10px rgba(0, 0, 0, 0.3);
}

.hero-subtitle {
    font-size: 24px;
    margin-bottom: 40px;
    opacity: 0.95;
}

.cta-button {
    background: white;
    color: var(--primary-color);
    border: none;
    padding: 15px 40px;
    font-size: 18px;
    font-weight: 600;
    border-radius: 30px;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    text-decoration: none;
    display: inline-block;
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 25px rgba(0, 0, 0, 0.3);
}

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

/* 产品展示 */
.products {
    padding: 100px 0;
    background: var(--light-bg);
}

.section-title {
    text-align: center;
    font-size: 42px;
    font-weight: 700;
    margin-bottom: 60px;
    color: var(--text-dark);
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: var(--primary-color);
    border-radius: 2px;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
}

.product-card {
    background: white;
    border-radius: 15px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
    cursor: pointer;
    text-decoration: none;
    color: inherit;
    display: block;
    overflow: hidden;
}

.product-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
}

.product-image {
    width: 100%;
    height: 280px;
    overflow: hidden;
    position: relative;
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

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

.product-info {
    padding: 30px 25px;
}

.product-icon {
    font-size: 60px;
    margin-bottom: 20px;
}

.product-card h3 {
    font-size: 24px;
    margin-bottom: 15px;
    color: var(--text-dark);
    transition: var(--transition);
}

.product-card:hover h3 {
    color: var(--primary-color);
}

.product-card p {
    color: #666;
    line-height: 1.8;
    font-size: 15px;
}

/* 小产品展示 */
.mini-products-section {
    margin-top: 80px;
    padding-top: 60px;
    border-top: 2px solid #e0e0e0;
}

.mini-products-title {
    text-align: center;
    font-size: 28px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 40px;
}

.mini-products-grid {
    display: grid;
    grid-template-columns: repeat(8, 1fr);
    gap: 20px;
}

.mini-product-item {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
    transition: var(--transition);
    cursor: pointer;
}

.mini-product-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.12);
}

.mini-product-video {
    width: 100%;
    height: 140px;
    object-fit: cover;
    display: block;
    background: #f5f5f5;
}

.mini-product-item:hover .mini-product-video {
    opacity: 0.9;
}

.mini-product-item p {
    padding: 12px 10px;
    text-align: center;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-dark);
    margin: 0;
}

/* 关于我们 */
.about {
    padding: 100px 0;
    background: white;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-text h2 {
    text-align: left;
}

.about-text h2::after {
    left: 0;
    transform: none;
}

.about-text p {
    font-size: 18px;
    line-height: 1.8;
    color: #555;
    margin-bottom: 30px;
}

.about-features {
    display: flex;
    gap: 30px;
    flex-wrap: wrap;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 16px;
    font-weight: 600;
    color: var(--primary-color);
}

.feature-item i {
    font-size: 24px;
}

.about-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.about-video {
    width: 100%;
    height: 400px;
    border-radius: 20px;
    box-shadow: var(--shadow);
    object-fit: cover;
}

.image-placeholder {
    width: 100%;
    height: 400px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 120px;
    box-shadow: var(--shadow);
}

/* 海关编码查询 */
.hs-code-section {
    margin-top: 50px;
    margin-bottom: 0;
}

.hs-code-btn {
    display: flex;
    align-items: center;
    gap: 20px;
    background: linear-gradient(135deg, #1565c0, #1976d2);
    color: white;
    padding: 20px 30px;
    border-radius: 15px;
    text-decoration: none;
    box-shadow: 0 4px 20px rgba(21, 101, 192, 0.3);
    transition: var(--transition);
    max-width: 500px;
}

.hs-code-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(21, 101, 192, 0.5);
}

.hs-code-btn > i:first-child {
    font-size: 28px;
    flex-shrink: 0;
}

.hs-code-btn > i:last-child {
    font-size: 16px;
    margin-left: auto;
    opacity: 0.8;
}

.hs-code-text {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.hs-code-text span {
    font-size: 18px;
    font-weight: 700;
}

.hs-code-text small {
    font-size: 13px;
    opacity: 0.85;
}

/* 认证证书 */
.certificates-section {
    margin-top: 80px;
    text-align: center;
}

.certificates-section h3 {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 40px;
}

.certificates-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    max-width: 900px;
    margin: 0 auto;
}

.certificate-item {
    background: white;
    border-radius: 15px;
    padding: 20px;
    box-shadow: var(--shadow);
    cursor: pointer;
    transition: var(--transition);
}

.certificate-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
}

.certificate-item img {
    width: 100%;
    height: 200px;
    object-fit: contain;
    border-radius: 10px;
    margin-bottom: 15px;
}

.certificate-item p {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-dark);
    margin: 0;
}

/* 证书灯箱 */
.certificate-lightbox {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.95);
    z-index: 9999;
    display: none;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.3s ease;
}

.certificate-lightbox.active {
    display: flex;
}

.certificate-lightbox img {
    max-width: 90%;
    max-height: 90vh;
    object-fit: contain;
    border-radius: 10px;
    box-shadow: 0 10px 50px rgba(0, 0, 0, 0.5);
}

/* 视频灯箱 */
.video-lightbox {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.95);
    z-index: 9999;
    display: none;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.3s ease;
}

.video-lightbox.active {
    display: flex;
}

.video-lightbox video {
    max-width: 90%;
    max-height: 85vh;
    border-radius: 10px;
    box-shadow: 0 10px 50px rgba(0, 0, 0, 0.5);
}

.video-lightbox-caption {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 15px 30px;
    border-radius: 25px;
    font-size: 18px;
    max-width: 80%;
    text-align: center;
}

/* 联系我们 */
.contact {
    padding: 100px 0 0 0;
    background: var(--light-bg);
}

.contact-grid {
    max-width: 800px;
    margin: 0 auto;
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.contact-item {
    background: white;
    padding: 30px;
    border-radius: 15px;
    display: flex;
    gap: 20px;
    align-items: flex-start;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.contact-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
}

.contact-item i {
    font-size: 28px;
    color: var(--primary-color);
    margin-top: 5px;
}

.contact-item h4 {
    font-size: 18px;
    margin-bottom: 8px;
    color: var(--text-dark);
}

.contact-item p {
    color: #666;
    font-size: 15px;
}

/* 照片轮播 */
.photo-carousel {
    width: 100%;
    overflow: hidden;
    background: white;
    padding: 60px 0;
    margin-top: 80px;
    position: relative;
}

.photo-carousel::before,
.photo-carousel::after {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    width: 100px;
    z-index: 2;
    pointer-events: none;
}

.photo-carousel::before {
    left: 0;
    background: linear-gradient(to right, var(--light-bg), transparent);
}

.photo-carousel::after {
    right: 0;
    background: linear-gradient(to left, var(--light-bg), transparent);
}

.carousel-track {
    display: flex;
    gap: 20px;
    animation: scroll-left 40s linear infinite;
    width: fit-content;
}

.carousel-track:hover {
    animation-play-state: paused;
}

.carousel-item {
    flex-shrink: 0;
    width: 300px;
    height: 200px;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    transition: var(--transition);
}

.carousel-item:hover {
    transform: scale(1.05);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.carousel-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

@keyframes scroll-left {
    0% {
        transform: translateX(0);
    }
    100% {
        transform: translateX(-50%);
    }
}

/* 底部信息 */
.footer {
    background: var(--dark-bg);
    color: var(--text-light);
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-map-container {
    margin-top: 10px;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.footer-section h3 {
    font-size: 20px;
    margin-bottom: 20px;
    color: var(--primary-color);
}

.footer-section p {
    line-height: 1.8;
    color: #ccc;
    margin-bottom: 10px;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 10px;
}

.footer-section ul li a {
    color: #ccc;
    text-decoration: none;
    transition: var(--transition);
}

.footer-section ul li a:hover {
    color: var(--primary-color);
    padding-left: 5px;
}

.footer-section i {
    margin-right: 8px;
    color: var(--primary-color);
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid #333;
    color: #999;
}

/* 底部工具链接 */
.footer-tools {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    padding: 30px 0;
    border-top: 1px solid #333;
    border-bottom: 1px solid #333;
    margin-bottom: 20px;
}

.footer-tool-btn {
    display: flex;
    align-items: center;
    gap: 15px;
    background: rgba(255, 255, 255, 0.05);
    color: white;
    padding: 18px 20px;
    border-radius: 12px;
    text-decoration: none;
    transition: var(--transition);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-tool-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-3px);
    border-color: var(--primary-color);
}

.footer-tool-btn > i:first-child {
    font-size: 24px;
    color: var(--primary-color);
    flex-shrink: 0;
}

.footer-tool-arrow {
    font-size: 14px;
    opacity: 0.6;
    margin-left: auto;
    flex-shrink: 0;
}

.footer-tool-text {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.footer-tool-text span {
    font-size: 15px;
    font-weight: 600;
    color: white;
}

.footer-tool-text small {
    font-size: 12px;
    color: #aaa;
}

/* 右下角小地图 */
.mini-map {
    position: fixed;
    bottom: 80px;
    right: 30px;
    width: 350px;
    height: 250px;
    background: white;
    border-radius: 15px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
    z-index: 997;
    overflow: hidden;
    transition: var(--transition);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
}

.mini-map.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.map-header {
    background: var(--primary-color);
    color: white;
    padding: 12px 15px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 600;
}

.map-close {
    background: none;
    border: none;
    color: white;
    font-size: 24px;
    cursor: pointer;
    line-height: 1;
    padding: 0;
    width: 24px;
    height: 24px;
}

.map-toggle {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 60px;
    height: 60px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 50%;
    font-size: 24px;
    cursor: pointer;
    box-shadow: var(--shadow);
    z-index: 996;
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.map-toggle:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 30px rgba(211, 47, 47, 0.4);
}

/* 地图按钮收缩停靠 */
.map-toggle.docked {
    border-radius: 50% 0 0 50%;
    right: -4px;
    width: 64px;
    bottom: 90px;
}

.map-toggle.docked:hover {
    transform: translateX(-6px);
    box-shadow: -4px 0 20px rgba(211,47,47,0.4);
}

/* APK 下载按钮 */
.apk-download-btn {
    position: fixed;
    bottom: 100px;
    right: 30px;
    z-index: 996;
    animation: bounce 2s infinite;
    transition: right 0.5s cubic-bezier(0.4, 0, 0.2, 1), bottom 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* APK 收缩停靠状态 */
.apk-download-btn.docked {
    animation: none;
    right: -2px;
    bottom: 160px;
}

.apk-download-btn.docked a {
    border-radius: 20px 0 0 20px;
    padding: 10px 14px 10px 16px;
    box-shadow: -2px 2px 12px rgba(76,175,80,0.35);
}

.apk-download-btn.docked a:hover {
    transform: translateX(-6px);
    box-shadow: -4px 4px 20px rgba(76,175,80,0.5);
}

.apk-download-btn.docked a span {
    display: none;
}

.apk-download-btn a {
    display: flex;
    align-items: center;
    gap: 10px;
    background: linear-gradient(135deg, #4CAF50, #45a049);
    color: white;
    padding: 12px 20px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 600;
    font-size: 14px;
    box-shadow: 0 4px 20px rgba(76, 175, 80, 0.4);
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.apk-download-btn a:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 30px rgba(76, 175, 80, 0.6);
}

.apk-download-btn i {
    font-size: 20px;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(-10px);
    }
    60% {
        transform: translateY(-5px);
    }
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-section:first-child {
        grid-column: 1 / -1;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 15px;
    }
    
    .hero {
        height: 450px;
        min-height: 400px;
    }
    
    .hero-title {
        font-size: 28px;
        margin-bottom: 12px;
    }
    
    .hero-subtitle {
        font-size: 15px;
        margin-bottom: 25px;
    }
    
    .cta-button {
        padding: 12px 30px;
        font-size: 16px;
    }
    
    /* 导航栏移动端 */
    .navbar {
        padding: 10px 0;
    }
    
    .navbar .container {
        position: relative;
    }
    
    .logo {
        font-size: 20px;
    }
    
    .logo-img {
        width: 32px;
        height: 32px;
    }
    
    .mobile-menu-toggle {
        display: flex !important;
    }
    
    .nav-menu {
        position: fixed;
        top: 60px;
        left: -100%;
        width: 80%;
        max-width: 300px;
        height: calc(100vh - 60px);
        background: white;
        flex-direction: column;
        padding: 20px 0;
        box-shadow: 2px 0 10px rgba(0, 0, 0, 0.1);
        transition: left 0.3s ease;
        overflow-y: auto;
        z-index: 999;
        gap: 0;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-menu > li {
        width: 100%;
        border-bottom: 1px solid #eee;
    }
    
    .nav-menu > li.nav-lang {
        border-bottom: none;
        padding: 15px 20px;
        justify-content: center;
    }
    
    .nav-menu > li > a {
        padding: 15px 20px;
        display: block;
    }
    
    .nav-menu > li > a::after {
        display: none;
    }
    
    .dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        border-radius: 0;
        padding: 0;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease;
        background: var(--light-bg);
    }
    
    .dropdown.active .dropdown-menu {
        max-height: 300px;
    }
    
    .dropdown-menu a {
        padding: 12px 20px 12px 40px;
        font-size: 14px;
    }
    
    /* 产品区域 */
    .products {
        padding: 50px 0;
    }
    
    .section-title {
        font-size: 26px;
        margin-bottom: 35px;
    }
    
    .section-title::after {
        width: 60px;
        height: 3px;
    }
    
    .products-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .product-image {
        height: 220px;
    }
    
    .product-info {
        padding: 25px 20px;
    }
    
    .product-card {
        border-radius: 12px;
    }
    
    .product-icon {
        font-size: 50px;
    }
    
    .product-card h3 {
        font-size: 20px;
    }
    
    .product-card p {
        font-size: 14px;
    }
    
    /* 小产品展示 */
    .mini-products-section {
        margin-top: 50px;
        padding-top: 40px;
    }
    
    .mini-products-title {
        font-size: 22px;
        margin-bottom: 30px;
    }
    
    .mini-products-grid {
        grid-template-columns: repeat(4, 1fr);
        gap: 15px;
    }
    
    .mini-product-video {
        height: 120px;
    }
    
    .mini-product-item p {
        padding: 10px 8px;
        font-size: 12px;
    }
    
    /* 关于我们 */
    .about {
        padding: 50px 0;
    }
    
    .about-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .about-text p {
        font-size: 15px;
    }
    
    .about-features {
        gap: 15px;
    }
    
    .feature-item {
        font-size: 14px;
    }
    
    .image-placeholder {
        height: 250px;
        font-size: 70px;
    }
    
    .about-video {
        height: 250px;
    }
    
    /* 证书展示 */
    .certificates-section {
        margin-top: 50px;
    }
    
    .certificates-section h3 {
        font-size: 22px;
        margin-bottom: 30px;
    }
    
    .certificates-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .certificate-item img {
        height: 180px;
    }
    
    /* 联系我们 */
    .contact {
        padding: 50px 0 0 0;
    }
    
    .contact-info {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .contact-item {
        padding: 20px;
    }
    
    /* 照片轮播 */
    .photo-carousel {
        padding: 40px 0;
        margin-top: 50px;
    }
    
    .carousel-item {
        width: 250px;
        height: 170px;
    }
    
    .carousel-track {
        gap: 15px;
    }
    
    /* 底部 */
    .footer {
        padding: 40px 0 20px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .footer-section h3 {
        font-size: 18px;
    }
    
    .footer-section p {
        font-size: 14px;
    }
    
    .footer-map-container iframe {
        height: 180px;
    }
    
    /* 悬浮元素 */
    .floating-sidebar {
        right: 10px;
    }
    .floating-sidebar.docked {
        right: -8px;
    }
    
    .whatsapp-btn {
        width: 50px;
        height: 50px;
        font-size: 24px;
    }
    
    .mini-map {
        width: calc(100% - 20px);
        max-width: 320px;
        height: 200px;
        right: 10px;
        bottom: 70px;
    }
    
    .map-toggle {
        right: 10px;
        bottom: 10px;
        width: 50px;
        height: 50px;
        font-size: 20px;
    }
    .map-toggle.docked {
        right: -4px;
        bottom: 80px;
        width: 54px;
    }
    
    /* APK 下载按钮 */
    .apk-download-btn {
        bottom: 70px;
        right: 10px;
    }
    .apk-download-btn.docked {
        right: -2px;
        bottom: 140px;
    }
    
    .apk-download-btn a {
        padding: 10px 16px;
        font-size: 12px;
    }
    
    .apk-download-btn i {
        font-size: 18px;
    }

    /* 底部工具链接 */
    .footer-tools {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .footer-tool-btn {
        padding: 15px;
    }
    
    .footer-tool-text span {
        font-size: 14px;
    }
    
    .footer-tool-text small {
        font-size: 11px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 26px;
    }
    
    .hero-subtitle {
        font-size: 14px;
    }
    
    .section-title {
        font-size: 24px;
    }
    
    .product-card h3 {
        font-size: 18px;
    }
    
    .about-text p {
        font-size: 15px;
    }
    
    .contact-item {
        padding: 20px;
    }
    
    .footer-section p {
        font-size: 13px;
    }
}

/* ===== PWA 安装横幅 ===== */
#pwaBanner {
    position: fixed;
    bottom: -100px;
    left: 50%;
    transform: translateX(-50%);
    width: calc(100% - 40px);
    max-width: 480px;
    background: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 100%);
    border: 1px solid var(--primary-color);
    border-radius: 16px;
    padding: 16px 20px;
    display: flex;
    align-items: center;
    gap: 14px;
    z-index: 9999;
    box-shadow: 0 8px 32px rgba(0,0,0,0.4);
    transition: bottom 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

#pwaBanner.show {
    bottom: 90px;
}

.pwa-banner-icon {
    font-size: 32px;
    color: #3ddc84;
    flex-shrink: 0;
}

.pwa-banner-text {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 3px;
}

.pwa-banner-text strong {
    color: #fff;
    font-size: 14px;
}

.pwa-banner-text small {
    color: #aaa;
    font-size: 12px;
}

.pwa-banner-install {
    background: var(--primary-color);
    color: #fff;
    border: none;
    padding: 8px 18px;
    border-radius: 8px;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    flex-shrink: 0;
    transition: var(--transition);
}

.pwa-banner-install:hover {
    background: var(--primary-dark);
    transform: scale(1.05);
}

.pwa-banner-close {
    background: transparent;
    border: none;
    color: #aaa;
    font-size: 20px;
    cursor: pointer;
    padding: 0 4px;
    flex-shrink: 0;
    line-height: 1;
    transition: color 0.2s;
}

.pwa-banner-close:hover {
    color: #fff;
}

/* ===== PWA 更新提示 ===== */
#pwaUpdateToast {
    position: fixed;
    top: -60px;
    left: 50%;
    transform: translateX(-50%);
    background: #2d2d2d;
    border: 1px solid #3ddc84;
    border-radius: 10px;
    padding: 12px 20px;
    display: flex;
    align-items: center;
    gap: 10px;
    z-index: 9999;
    color: #fff;
    font-size: 14px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.3);
    transition: top 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
    white-space: nowrap;
}

#pwaUpdateToast.show {
    top: 80px;
}

#pwaUpdateToast i {
    color: #3ddc84;
    animation: spin 1.5s linear infinite;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

#pwaUpdateBtn {
    background: #3ddc84;
    color: #1a1a1a;
    border: none;
    padding: 5px 14px;
    border-radius: 6px;
    font-size: 12px;
    font-weight: 700;
    cursor: pointer;
    margin-left: 6px;
    transition: var(--transition);
}

#pwaUpdateBtn:hover {
    background: #2cb870;
}