/* CSS重置和基本样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #00FF88;
    --primary-dark: #00CC6A;
    --dark-bg: #003300;
    --light-accent: #99FFCC;
    --text-light: #FFFFFF;
    --text-dark: #333333;
    --text-gray: #666666;
    --bg-light: #F5F5F5;
    --bg-dark: #111111;
    --border-color: rgba(0, 255, 136, 0.2);
    --shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
    --radius: 8px;
    --transition: all 0.3s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', sans-serif;
    color: var(--text-dark);
    background-color: #fff;
    line-height: 1.6;
    overflow-x: hidden;
}

h1, h2, h3, h4 {
    font-family: 'Poppins', sans-serif;
    font-weight: 700;
    line-height: 1.2;
}

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

section {
    padding: 80px 0;
}

/* 按钮样式 */
.btn-primary, .btn-secondary, .btn-outline, .btn-text {
    display: inline-block;
    padding: 12px 28px;
    border-radius: var(--radius);
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
    border: none;
    font-family: 'Inter', sans-serif;
}

.btn-primary {
    background-color: var(--primary-color);
    color: var(--dark-bg);
}

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 255, 136, 0.3);
}

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

.btn-secondary:hover {
    background-color: rgba(0, 255, 136, 0.1);
    transform: translateY(-2px);
}

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

.btn-outline:hover {
    border-color: var(--primary-color);
    background-color: rgba(0, 255, 136, 0.05);
}

.btn-text {
    color: var(--primary-color);
    padding: 8px 0;
    font-weight: 600;
}

.btn-text:hover {
    padding-right: 10px;
}

.btn-text i {
    margin-left: 5px;
    transition: var(--transition);
}

.btn-text:hover i {
    margin-left: 10px;
}

.btn-large {
    padding: 16px 36px;
    font-size: 1.1rem;
}

.btn-full {
    width: 100%;
    padding: 16px;
    font-size: 1.1rem;
}

/* 顶部导航栏 */
.header {
    background-color: var(--dark-bg);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
}

.logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    color: var(--text-light);
    font-size: 1.5rem;
    font-weight: 700;
}

.logo img {
    height: 40px;
    margin-right: 10px;
}

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

.nav-menu li {
    margin-left: 30px;
}

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

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

.nav-menu a.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--primary-color);
}

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

.language-selector {
    display: flex;
    align-items: center;
    color: var(--text-light);
    gap: 8px;
}

.language-selector select {
    background: transparent;
    border: none;
    color: var(--text-light);
    font-family: 'Inter', sans-serif;
    font-weight: 500;
    cursor: pointer;
    outline: none;
}

.language-selector option {
    background-color: var(--dark-bg);
    color: var(--text-light);
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 5px;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background-color: var(--text-light);
    border-radius: 2px;
    transition: var(--transition);
}

/* Hero区 */
.hero {
    background: linear-gradient(135deg, var(--dark-bg) 0%, #001a00 100%);
    color: var(--text-light);
    padding-top: 140px;
    padding-bottom: 80px;
    position: relative;
    overflow: hidden;
}

.hero .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 50px;
}

.hero-content {
    flex: 1;
    max-width: 600px;
}

.hero-title {
    font-size: 3.2rem;
    margin-bottom: 20px;
    line-height: 1.1;
}

.hero-subtitle {
    font-size: 1.2rem;
    color: var(--light-accent);
    margin-bottom: 40px;
    font-weight: 300;
}

.hero-features {
    display: flex;
    gap: 30px;
    margin-bottom: 40px;
}

.feature {
    display: flex;
    align-items: center;
    gap: 15px;
}

.feature i {
    font-size: 2rem;
    color: var(--primary-color);
}

.feature h3 {
    font-size: 1.8rem;
    color: var(--primary-color);
    margin-bottom: 5px;
}

.feature p {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.8);
}

.hero-actions {
    display: flex;
    gap: 20px;
}

.hero-visual {
    flex: 1;
    max-width: 500px;
}

.product-carousel {
    background: rgba(0, 0, 0, 0.3);
    border-radius: 20px;
    padding: 30px;
    border: 1px solid rgba(0, 255, 136, 0.2);
    backdrop-filter: blur(10px);
}

.carousel-container {
    position: relative;
    height: 300px;
    margin-bottom: 20px;
}

.carousel-item {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 0.5s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.carousel-item.active {
    opacity: 1;
}

.headphone-model {
    width: 200px;
    height: 180px;
    margin-bottom: 20px;
    position: relative;
}

.wireless::before, .wired::before, .call-center::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
}

.wireless::before {
    background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 200 180"><path d="M50,90 C50,50 90,30 130,30 C170,30 190,50 190,90 L190,120 C190,160 150,180 110,180 L90,180 C50,180 10,160 10,120 L10,90 C10,50 30,30 70,30" fill="%23003300" stroke="%2300FF88" stroke-width="4"/><circle cx="60" cy="100" r="8" fill="%2300FF88"/><circle cx="140" cy="100" r="8" fill="%2300FF88"/><rect x="85" y="20" width="30" height="10" rx="5" fill="%2300FF88"/></svg>');
}

.wired::before {
    background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 200 180"><path d="M40,100 C40,60 80,40 120,40 C160,40 180,60 180,100 L180,130 C180,170 140,190 100,190 L80,190 C40,190 0,170 0,130 L0,100 C0,60 20,40 60,40" fill="%23003300" stroke="%2300FF88" stroke-width="4"/><path d="M100,190 L100,220" stroke="%2300FF88" stroke-width="4"/><circle cx="50" cy="110" r="10" fill="%2300FF88"/><circle cx="150" cy="110" r="10" fill="%2300FF88"/></svg>');
}

.call-center::before {
    background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 200 180"><path d="M30,100 C30,60 70,40 110,40 C150,40 170,60 170,100 L170,130 C170,170 130,190 90,190 L70,190 C30,190 0,170 0,130 L0,100 C0,60 20,40 60,40" fill="%23003300" stroke="%2300FF88" stroke-width="4"/><path d="M200,120 L170,100 L170,140 L200,120" stroke="%2300FF88" stroke-width="4" fill="none"/><circle cx="40" cy="110" r="8" fill="%2300FF88"/><circle cx="160" cy="110" r="8" fill="%2300FF88"/></svg>');
}

.product-info {
    text-align: center;
}

.product-info h4 {
    color: var(--primary-color);
    margin-bottom: 5px;
}

.product-info p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9rem;
}

.carousel-controls {
    display: flex;
    justify-content: center;
    gap: 10px;
}

.carousel-btn {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.3);
    border: none;
    cursor: pointer;
    transition: var(--transition);
}

.carousel-btn.active {
    background-color: var(--primary-color);
    transform: scale(1.2);
}

/* 区块标题 */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header h2 {
    font-size: 2.5rem;
    margin-bottom: 15px;
    color: var(--dark-bg);
}

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

/* 产品分类区 */
.products {
    background-color: var(--bg-light);
}

.product-tabs {
    background-color: white;
    border-radius: var(--radius);
    padding: 30px;
    box-shadow: var(--shadow);
}

.tab-buttons {
    display: flex;
    justify-content: center;
    margin-bottom: 40px;
    border-bottom: 1px solid #eee;
}

.tab-btn {
    padding: 15px 40px;
    background: none;
    border: none;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-gray);
    cursor: pointer;
    position: relative;
    transition: var(--transition);
}

.tab-btn:hover {
    color: var(--dark-bg);
}

.tab-btn.active {
    color: var(--primary-color);
}

.tab-btn.active::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 100%;
    height: 3px;
    background-color: var(--primary-color);
}

.tab-pane {
    display: none;
}

.tab-pane.active {
    display: block;
    animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.product-card {
    background-color: white;
    border-radius: var(--radius);
    padding: 30px;
    text-align: center;
    border: 1px solid #eee;
    transition: var(--transition);
}

.product-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow);
    border-color: var(--primary-color);
}

.product-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
}

.music::before, .gaming::before, .call::before, .wireless-gaming::before, .casual::before, .streamer::before {
    content: '';
    display: block;
    width: 100%;
    height: 100%;
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
}

.music::before {
    background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="50" cy="50" r="45" fill="%23003300" stroke="%2300FF88" stroke-width="3"/><path d="M35,40 L65,40 L65,70 L35,70 Z" fill="%2300FF88"/><path d="M40,30 L60,30 L60,40 L40,40 Z" fill="%2300FF88"/><circle cx="50" cy="60" r="5" fill="%2399FFCC"/></svg>');
}

.gaming::before {
    background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="50" cy="50" r="45" fill="%23003300" stroke="%2300FF88" stroke-width="3"/><path d="M30,40 L70,40 L70,70 L30,70 Z" fill="%2300FF88"/><circle cx="40" cy="55" r="8" fill="%2399FFCC"/><circle cx="60" cy="55" r="8" fill="%2399FFCC"/><rect x="45" y="65" width="10" height="5" rx="2" fill="%2399FFCC"/></svg>');
}

.call::before {
    background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="50" cy="50" r="45" fill="%23003300" stroke="%2300FF88" stroke-width="3"/><path d="M30,40 L70,40 L70,70 L30,70 Z" fill="%2300FF88"/><path d="M80,50 L70,45 L70,55 L80,50" fill="%2399FFCC" stroke="%2399FFCC" stroke-width="2"/><circle cx="40" cy="55" r="5" fill="%2399FFCC"/><circle cx="60" cy="55" r="5" fill="%2399FFCC"/></svg>');
}

.wireless-gaming::before {
    background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="50" cy="50" r="45" fill="%23003300" stroke="%2300FF88" stroke-width="3"/><path d="M30,40 L70,40 L70,70 L30,70 Z" fill="%2300FF88"/><circle cx="50" cy="55" r="10" fill="%2399FFCC" opacity="0.7"/><circle cx="50" cy="55" r="5" fill="%2300FF88"/></svg>');
}

.casual::before {
    background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="50" cy="50" r="45" fill="%23003300" stroke="%2300FF88" stroke-width="3"/><path d="M35,45 L65,45 L65,65 L35,65 Z" fill="%2300FF88"/><path d="M40,35 L60,35 L60,45 L40,45 Z" fill="%2300FF88"/><circle cx="50" cy="55" r="3" fill="%2399FFCC"/></svg>');
}

.streamer::before {
    background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="50" cy="50" r="45" fill="%23003300" stroke="%2300FF88" stroke-width="3"/><path d="M30,40 L70,40 L70,70 L30,70 Z" fill="%2300FF88"/><path d="M75,50 L70,47 L70,53 L75,50" fill="%2399FFCC" stroke="%2399FFCC" stroke-width="2"/><circle cx="40" cy="55" r="6" fill="%2399FFCC"/><circle cx="60" cy="55" r="6" fill="%2399FFCC"/><circle cx="50" cy="65" r="3" fill="%2399FFCC"/></svg>');
}

.product-card h3 {
    font-size: 1.3rem;
    margin-bottom: 15px;
    color: var(--dark-bg);
}

.product-features {
    list-style: none;
    margin-bottom: 20px;
    text-align: left;
}

.product-features li {
    padding: 8px 0;
    position: relative;
    padding-left: 25px;
}

.product-features li:before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
}

/* 技术优势区 */
.tech-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.tech-card {
    background-color: white;
    border-radius: var(--radius);
    padding: 30px;
    box-shadow: var(--shadow);
    border-top: 4px solid var(--primary-color);
    transition: var(--transition);
}

.tech-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
}

.tech-icon {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.tech-card h3 {
    font-size: 1.4rem;
    margin-bottom: 15px;
    color: var(--dark-bg);
}

.tech-card p {
    color: var(--text-gray);
    margin-bottom: 20px;
}

.tech-metric {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 20px;
}

.progress-bar {
    flex: 1;
    height: 8px;
    background-color: #eee;
    border-radius: 4px;
    margin: 0 15px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background-color: var(--primary-color);
    border-radius: 4px;
}

.percentage {
    font-weight: 700;
    color: var(--primary-color);
}

.tech-tag {
    display: inline-block;
    background-color: rgba(0, 255, 136, 0.1);
    color: var(--primary-color);
    padding: 5px 15px;
    border-radius: 20px;
    font-weight: 600;
    font-size: 0.9rem;
}

.cert-badges {
    display: flex;
    gap: 10px;
    margin-top: 15px;
}

.cert-badge {
    background-color: var(--dark-bg);
    color: var(--light-accent);
    padding: 5px 15px;
    border-radius: 4px;
    font-weight: 600;
    font-size: 0.9rem;
}

/* 外贸服务区 */
.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.service-card {
    background-color: white;
    border-radius: var(--radius);
    padding: 30px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
}

.service-header {
    display: flex;
    align-items: center;
    margin-bottom: 25px;
}

.service-header i {
    font-size: 2rem;
    color: var(--primary-color);
    margin-right: 15px;
}

.service-header h3 {
    font-size: 1.4rem;
    color: var(--dark-bg);
}

.service-process {
    margin-bottom: 25px;
}

.process-step {
    display: flex;
    align-items: center;
    margin-bottom: 15px;
}

.process-step span {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 30px;
    height: 30px;
    background-color: var(--primary-color);
    color: var(--dark-bg);
    border-radius: 50%;
    font-weight: 700;
    margin-right: 15px;
    flex-shrink: 0;
}

.service-features {
    list-style: none;
    margin-bottom: 25px;
    flex-grow: 1;
}

.service-features li {
    padding: 8px 0;
    position: relative;
    padding-left: 25px;
}

.service-features li:before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-size: 1.5rem;
    line-height: 1;
}

.certifications {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin: 20px 0;
}

.cert-logo {
    background-color: var(--bg-light);
    padding: 10px 15px;
    border-radius: var(--radius);
    font-weight: 600;
    color: var(--dark-bg);
}

.warranty-badge {
    display: flex;
    align-items: center;
    background-color: rgba(0, 255, 136, 0.1);
    padding: 15px;
    border-radius: var(--radius);
    margin-top: auto;
}

.warranty-badge i {
    font-size: 2rem;
    color: var(--primary-color);
    margin-right: 15px;
}

.warranty-badge span {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--dark-bg);
    display: block;
}

.warranty-badge p {
    color: var(--text-gray);
    font-size: 0.9rem;
}

.logistics-map {
    height: 150px;
    background-color: var(--bg-light);
    border-radius: var(--radius);
    margin: 20px 0;
    position: relative;
    overflow: hidden;
}

.map-dots {
    position: relative;
    width: 100%;
    height: 100%;
}

.dot {
    position: absolute;
    width: 30px;
    height: 30px;
    background-color: var(--primary-color);
    color: var(--dark-bg);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.8rem;
    box-shadow: 0 0 10px rgba(0, 255, 136, 0.5);
}

.logistics-options {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin: 15px 0;
}

.logistics-tag {
    background-color: var(--dark-bg);
    color: var(--light-accent);
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 600;
}

/* 合作品牌区 */
.clients {
    background-color: var(--dark-bg);
    color: var(--text-light);
    padding: 60px 0;
}

.clients .section-header h2 {
    color: var(--text-light);
}

.client-scroller {
    overflow: hidden;
    position: relative;
    width: 100%;
}

.client-track {
    display: flex;
    animation: scroll 30s linear infinite;
    width: max-content;
}

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

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

.client-logo {
    height: 80px;
    min-width: 180px;
    background-color: rgba(255, 255, 255, 0.05);
    margin: 0 15px;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    font-weight: 700;
    color: rgba(255, 255, 255, 0.7);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

/* 询盘引导区 */
.quote {
    background-color: var(--bg-light);
}

.quote-content {
    display: flex;
    gap: 50px;
    background-color: white;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
}

.quote-info {
    flex: 1;
    padding: 50px;
    background-color: var(--dark-bg);
    color: var(--text-light);
}

.quote-info h2 {
    color: var(--text-light);
    margin-bottom: 20px;
}

.highlight {
    font-size: 1.3rem;
    color: var(--primary-color);
    margin-bottom: 30px;
    font-weight: 600;
}

.benefits {
    margin: 30px 0;
}

.benefit {
    display: flex;
    align-items: center;
    margin-bottom: 20px;
}

.benefit i {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-right: 15px;
    width: 30px;
}

.benefit h4 {
    font-size: 1.1rem;
    margin-bottom: 5px;
}

.benefit p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9rem;
}

.contact-methods {
    margin-top: 40px;
}

.contact-link {
    display: flex;
    align-items: center;
    color: var(--light-accent);
    text-decoration: none;
    margin-bottom: 15px;
    transition: var(--transition);
}

.contact-link:hover {
    color: var(--primary-color);
    padding-left: 5px;
}

.contact-link i {
    margin-right: 10px;
    width: 20px;
}

.quote-form {
    flex: 1;
    padding: 50px;
}

.quote-form h3 {
    color: var(--dark-bg);
    margin-bottom: 30px;
    font-size: 1.8rem;
}

.form-group {
    margin-bottom: 20px;
}

.form-group input, .form-group select, .form-group textarea {
    width: 100%;
    padding: 15px;
    border: 1px solid #ddd;
    border-radius: var(--radius);
    font-family: 'Inter', sans-serif;
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 255, 136, 0.1);
}

/* 页脚 */
.footer {
    background-color: var(--dark-bg);
    color: var(--text-light);
    padding: 70px 0 30px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    margin-bottom: 50px;
}

.footer-logo {
    display: flex;
    align-items: center;
    margin-bottom: 20px;
}

.footer-logo img {
    height: 40px;
    margin-right: 10px;
}

.footer-logo span {
    font-size: 1.5rem;
    font-weight: 700;
}

.footer-col p {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 20px;
    line-height: 1.7;
}

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

.social-icons a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--text-light);
    border-radius: 50%;
    text-decoration: none;
    transition: var(--transition);
}

.social-icons a:hover {
    background-color: var(--primary-color);
    color: var(--dark-bg);
    transform: translateY(-3px);
}

.footer-col h4 {
    font-size: 1.2rem;
    margin-bottom: 20px;
    color: var(--text-light);
}

.footer-links {
    list-style: none;
}

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

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: var(--transition);
}

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

.contact-info p {
    display: flex;
    align-items: flex-start;
    margin-bottom: 15px;
    color: rgba(255, 255, 255, 0.7);
}

.contact-info i {
    margin-right: 10px;
    color: var(--primary-color);
    margin-top: 3px;
    width: 16px;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.5);
}

.footer-links-bottom {
    display: flex;
    gap: 20px;
}

.footer-links-bottom a {
    color: rgba(255, 255, 255, 0.5);
    text-decoration: none;
    transition: var(--transition);
}

.footer-links-bottom a:hover {
    color: var(--primary-color);
}

/* 返回顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background-color: var(--primary-color);
    color: var(--dark-bg);
    border: none;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 999;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

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

.back-to-top:hover {
    background-color: var(--primary-dark);
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
}

/* 响应式设计 */
@media (max-width: 1100px) {
    .hero .container {
        flex-direction: column;
        text-align: center;
    }
    
    .hero-features {
        justify-content: center;
    }
    
    .hero-visual {
        max-width: 100%;
    }
    
    .product-grid, .tech-grid, .services-grid, .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .quote-content {
        flex-direction: column;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 90px;
        left: -100%;
        flex-direction: column;
        background-color: var(--dark-bg);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: 20px 0;
        z-index: 999;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-menu li {
        margin: 15px 0;
    }

    .hamburger {
        display: flex;
    }

    .hamburger.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

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

    .hamburger.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .product-grid, .tech-grid, .services-grid, .footer-grid {
        grid-template-columns: 1fr;
    }
    
    .tab-buttons {
        flex-direction: column;
    }
    
    .tab-btn {
        width: 100%;
        border-bottom: 1px solid #eee;
    }
    
    .tab-btn.active::after {
        display: none;
    }
}

@media (max-width: 480px) {
    .section-header h2 {
        font-size: 2rem;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-features {
        flex-direction: column;
        align-items: center;
        gap: 20px;
    }
    
    .carousel-container {
        height: 250px;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }
    
    .footer-links-bottom {
        justify-content: center;
    }
}

/* 添加到style.css文件末尾 */

/* 表单错误样式 */
.form-group input.error,
.form-group select.error,
.form-group textarea.error {
    border-color: #FF5555 !important;
    box-shadow: 0 0 0 2px rgba(255, 85, 85, 0.1) !important;
}

.form-group input.error:focus,
.form-group select.error:focus,
.form-group textarea.error:focus {
    border-color: #FF5555 !important;
    box-shadow: 0 0 0 3px rgba(255, 85, 85, 0.2) !important;
}

.error-message {
    color: #FF5555;
    font-size: 0.85rem;
    margin-top: 5px;
    display: flex;
    align-items: center;
    gap: 6px;
    font-weight: 500;
}

.error-message:before {
    content: "⚠";
    font-size: 0.9rem;
}