/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #d71920;
    --secondary-color: #a01419;
    --accent-color: #ff2d35;
    --text-dark: #333333;
    --text-light: #666666;
    --bg-light: #f5f5f5;
    --bg-white: #ffffff;
    --border-color: #e0e0e0;
    --success-color: #28a745;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 4px 12px rgba(0, 0, 0, 0.12);
    --shadow-xl: 0 8px 24px rgba(0, 0, 0, 0.15);
}

body {
    font-family: 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB',
                 'Microsoft YaHei', 'Helvetica Neue', Helvetica, Arial, sans-serif;
    line-height: 1.75;
    color: var(--text-dark);
    background-color: var(--bg-white);
    font-size: 15px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1140px;
    margin: 0 auto;
    padding: 0 30px;
}

/* 导航栏 */
.navbar {
    background-color: var(--bg-white);
    box-shadow: 0 1px 0 rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 0;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    min-height: 70px;
}

.nav-brand {
    display: flex;
    align-items: center;
}

.nav-brand .logo {
    height: 45px;
    width: auto;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2.5rem;
    align-items: center;
}

.nav-menu a {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 400;
    font-size: 15px;
    transition: color 0.3s;
}

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

.nav-menu a.btn-primary {
    background-color: var(--primary-color);
    color: white;
    padding: 0.625rem 1.75rem;
    border-radius: 2px;
    font-weight: 500;
}

.nav-menu a.btn-primary:hover {
    background-color: var(--secondary-color);
    color: white;
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background-color: var(--text-dark);
    transition: 0.3s;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 0.75rem 2rem;
    border-radius: 2px;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s;
    border: none;
    cursor: pointer;
    font-size: 15px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

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

.btn-primary:hover {
    background-color: var(--secondary-color);
    box-shadow: 0 2px 8px rgba(215, 25, 32, 0.3);
}

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

.btn-secondary:hover {
    background-color: var(--primary-color);
    color: white;
}

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

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

.btn-block {
    width: 100%;
}

/* 首页横幅 */
.hero {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.75) 0%, rgba(248, 249, 250, 0.75) 100%),
                url('../images/hero.jpg') center/cover no-repeat;
    color: var(--text-dark);
    padding: 5rem 2rem 6rem;
    position: relative;
    border-bottom: 1px solid var(--border-color);
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background-color: var(--primary-color);
    z-index: 2;
}

.hero::after {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(215, 25, 32, 0.08) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
    z-index: 1;
}

.hero-content {
    max-width: 960px;
    margin: 0 auto 4rem;
    text-align: center;
    position: relative;
    z-index: 2;
}

.hero-title {
    font-size: 3rem;
    font-weight: 300;
    margin-bottom: 1.5rem;
    line-height: 1.25;
    color: var(--text-dark);
    letter-spacing: -0.5px;
}

.hero-title strong {
    font-weight: 700;
    color: var(--primary-color);
    display: block;
    margin-top: 0.5rem;
}

.hero-subtitle {
    font-size: 1.125rem;
    margin-bottom: 3rem;
    color: var(--text-light);
    font-weight: 400;
    max-width: 700px;
    line-height: 1.8;
    margin-left: auto;
    margin-right: auto;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.hero-features {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0;
    max-width: 960px;
    margin: 0 auto;
    border: 1px solid var(--border-color);
}

.feature-card {
    background-color: var(--bg-white);
    padding: 2rem 1.5rem;
    border-radius: 0;
    transition: all 0.3s;
    border-right: 1px solid var(--border-color);
    position: relative;
    text-align: center;
}

.feature-card:last-child {
    border-right: none;
}

.feature-card::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 3px;
    background-color: var(--primary-color);
    transition: width 0.3s;
}

.feature-card:hover {
    background-color: #fafafa;
}

.feature-card:hover::after {
    width: 60%;
}

.feature-card i {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.feature-card h3 {
    font-size: 1rem;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-dark);
}

.feature-card p {
    color: var(--text-light);
    font-size: 0.875rem;
    line-height: 1.6;
}

/* 通用板块样式 */
.section-title {
    font-size: 2.25rem;
    font-weight: 300;
    text-align: center;
    margin-bottom: 1.25rem;
    color: var(--text-dark);
    position: relative;
    padding-bottom: 1.5rem;
    letter-spacing: -0.5px;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 2px;
    background-color: var(--primary-color);
}

.section-subtitle {
    text-align: center;
    font-size: 1.0625rem;
    color: var(--text-light);
    margin-bottom: 4rem;
    font-weight: 400;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.8;
}

/* 设备介绍 */
.devices-section {
    padding: 5rem 0;
    background-color: #fafafa;
}

.devices-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2.5rem;
    margin-bottom: 3rem;
}

.device-card {
    background-color: var(--bg-white);
    border-radius: 0;
    padding: 0;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    transition: all 0.4s;
    position: relative;
    border: none;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.device-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background-color: transparent;
    transition: background-color 0.3s;
}

.device-card:hover {
    box-shadow: 0 8px 24px rgba(0,0,0,0.12);
    transform: translateY(-4px);
}

.device-card:hover::before {
    background-color: var(--primary-color);
}

.device-card.featured::before {
    background-color: var(--primary-color);
}

.badge {
    position: absolute;
    top: 0;
    right: 0;
    background-color: var(--primary-color);
    color: white;
    padding: 0.625rem 1.25rem;
    border-radius: 0;
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    z-index: 10;
}

.device-image {
    text-align: center;
    margin-bottom: 0;
    padding: 3rem 2rem 2rem;
    background-color: #fafafa;
    border-bottom: 1px solid var(--border-color);
    height: 280px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.device-image img {
    max-width: 100%;
    max-height: 100%;
    width: auto;
    height: auto;
    object-fit: contain;
    cursor: pointer;
    transition: transform 0.3s;
}

.device-image img:hover {
    transform: scale(1.05);
}

.device-image i {
    font-size: 4rem;
    color: var(--text-light);
}

/* 图片放大灯箱 */
.image-modal {
    display: none;
    position: fixed;
    z-index: 9999;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(255, 255, 255, 0.98);
    animation: fadeIn 0.3s;
    overflow-y: auto;
}

.image-modal.active {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.modal-content-wrapper {
    display: flex;
    gap: 3rem;
    max-width: 1200px;
    width: 100%;
    background-color: white;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    border-radius: 8px;
    overflow: hidden;
    animation: zoomIn 0.3s;
}

.modal-image-container {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: #fafafa;
    padding: 3rem;
    min-height: 500px;
    position: relative;
}

.modal-image-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background-color: var(--primary-color);
}

.modal-image-container img {
    max-width: 100%;
    max-height: 600px;
    object-fit: contain;
}

.modal-details {
    flex: 1;
    padding: 3rem;
    display: flex;
    flex-direction: column;
}

.modal-details h2 {
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: var(--text-dark);
}

.modal-details .modal-price {
    margin-bottom: 2rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--border-color);
}

.modal-details .modal-price .price {
    font-size: 2.5rem;
    font-weight: 300;
    color: var(--primary-color);
    letter-spacing: -1px;
}

.modal-details .modal-price .price strong {
    font-weight: 700;
}

.modal-details .modal-price .period {
    color: var(--text-light);
    font-size: 1rem;
    font-weight: 400;
    margin-left: 0.5rem;
}

.modal-specs {
    list-style: none;
    padding: 0;
    margin: 0;
}

.modal-specs li {
    padding: 1rem 0;
    border-bottom: 1px solid #f0f0f0;
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 1rem;
    color: var(--text-dark);
}

.modal-specs li:last-child {
    border-bottom: none;
}

.modal-specs i {
    color: var(--primary-color);
    font-size: 1rem;
    width: 20px;
    text-align: center;
}

.image-modal-close {
    position: absolute;
    top: 20px;
    right: 40px;
    color: #333333;
    font-size: 40px;
    font-weight: 300;
    cursor: pointer;
    transition: color 0.3s;
    z-index: 10000;
}

.image-modal-close:hover {
    color: var(--primary-color);
}

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

@keyframes zoomIn {
    from { transform: scale(0.8); }
    to { transform: scale(1); }
}

.device-card h3 {
    font-size: 1.375rem;
    margin-bottom: 0;
    padding: 1.5rem 2rem 1rem;
    text-align: left;
    color: var(--text-dark);
    font-weight: 600;
    letter-spacing: -0.3px;
}

.device-specs {
    list-style: none;
    margin-bottom: 0;
    padding: 0 2rem 1.5rem;
    flex-grow: 1;
}

.device-specs li {
    padding: 0.625rem 0;
    border-bottom: 1px solid #f0f0f0;
    display: flex;
    align-items: center;
    gap: 0.875rem;
    font-size: 0.875rem;
    color: var(--text-dark);
}

.device-specs li:last-child {
    border-bottom: none;
}

.device-specs i {
    color: var(--primary-color);
    font-size: 0.875rem;
    width: 16px;
    text-align: center;
}

.device-price {
    text-align: left;
    padding: 1.5rem 2rem;
    border-top: 1px solid var(--border-color);
    background-color: #fafafa;
    display: flex;
    align-items: baseline;
    gap: 0.5rem;
}

.device-price .price {
    font-size: 2.25rem;
    font-weight: 300;
    color: var(--primary-color);
    letter-spacing: -1px;
}

.device-price .price strong {
    font-weight: 700;
}

.device-price .period {
    color: var(--text-light);
    font-size: 0.875rem;
    font-weight: 400;
}

/* 租赁方案 */
.plans-section {
    padding: 5rem 0;
    background-color: var(--bg-white);
}

.plans-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2.5rem;
    margin-bottom: 3rem;
}

.plan-card {
    display: flex;
    flex-direction: column;
    background-color: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: 0;
    padding: 0;
    transition: all 0.4s;
    position: relative;
    overflow: hidden;
}

.plan-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background-color: transparent;
    transition: background-color 0.3s;
}

.plan-card:hover {
    box-shadow: 0 8px 24px rgba(0,0,0,0.12);
    transform: translateY(-4px);
}

.plan-card:hover::before {
    background-color: var(--primary-color);
}

.plan-card.popular {
    box-shadow: 0 4px 16px rgba(215, 25, 32, 0.12);
}

.plan-card.popular::before {
    background-color: var(--primary-color);
}

.plan-card.popular:hover {
    box-shadow: 0 8px 24px rgba(215, 25, 32, 0.2);
}

.popular-badge {
    position: absolute;
    top: 0;
    right: 0;
    background-color: var(--primary-color);
    color: white;
    padding: 0.625rem 1.25rem;
    border-radius: 0;
    font-weight: 600;
    font-size: 0.6875rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    z-index: 10;
}

.plan-name {
    font-size: 1.5rem;
    font-weight: 600;
    text-align: left;
    padding: 2rem 2.5rem 0;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
    letter-spacing: -0.3px;
}

.plan-price {
    text-align: left;
    padding: 0.5rem 2.5rem 2rem;
    margin-bottom: 0;
    border-bottom: 1px solid var(--border-color);
}

.plan-price .amount {
    font-size: 2.75rem;
    font-weight: 300;
    color: var(--primary-color);
    letter-spacing: -1px;
}

.plan-price .amount strong {
    font-weight: 700;
}

.plan-price .period {
    font-size: 0.875rem;
    color: var(--text-light);
    font-weight: 400;
    margin-left: 0.5rem;
}

.plan-features {
    flex: 1;
    list-style: none;
    margin-bottom: 0;
    padding: 2rem 2.5rem;
}

.plan-features li {
    padding: 0.75rem 0;
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    font-size: 0.9375rem;
    line-height: 1.7;
    color: var(--text-dark);
}

.plan-features i {
    color: var(--primary-color);
    margin-top: 0.25rem;
    font-size: 1rem;
    width: 16px;
    text-align: center;
    flex-shrink: 0;
}

.plan-card .btn {
    width: calc(100% - 5rem);
    margin: 0 2.5rem 2.5rem;
    padding: 0.875rem 2rem;
    font-size: 0.9375rem;
}

.plan-benefits {
    margin-top: 4rem;
    padding-top: 4rem;
    border-top: 1px solid var(--border-color);
}

.plan-benefits h3 {
    font-size: 2rem;
    text-align: center;
    margin-bottom: 3rem;
    font-weight: 700;
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.benefit-item {
    text-align: center;
    padding: 2rem;
}

.benefit-item i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.benefit-item h4 {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
    font-weight: 600;
}

.benefit-item p {
    color: var(--text-light);
    font-size: 0.9375rem;
    line-height: 1.6;
}

/* 软件方案 */
.software-section {
    padding: 5rem 0;
    background-color: var(--bg-light);
}

.software-intro {
    margin-bottom: 4rem;
}

.intro-highlights {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    max-width: 1000px;
    margin: 0 auto;
}

.highlight-item {
    text-align: center;
    padding: 2rem 1.5rem;
    background-color: var(--bg-white);
    border-radius: 8px;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s;
    border: 1px solid var(--border-color);
}

.highlight-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-color);
}

.highlight-item i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.highlight-item h4 {
    font-size: 1.125rem;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
    font-weight: 600;
}

.highlight-item p {
    font-size: 0.875rem;
    color: var(--text-light);
    line-height: 1.6;
}

.software-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 3rem;
}

.software-features {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.software-feature {
    display: flex;
    gap: 1.5rem;
    background-color: var(--bg-white);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s;
    border: 1px solid var(--border-color);
}

.software-feature:hover {
    transform: translateX(8px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-color);
}

.feature-icon {
    flex-shrink: 0;
    width: 60px;
    height: 60px;
    background-color: var(--primary-color);
    color: white;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
}

.feature-info h3 {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
    color: var(--text-dark);
    font-weight: 600;
}

.feature-info p {
    color: var(--text-light);
    margin-bottom: 1rem;
    line-height: 1.7;
    font-size: 0.9375rem;
}

.feature-info ul {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.feature-info ul li {
    background-color: var(--bg-light);
    padding: 0.5rem 1rem;
    border-radius: 4px;
    font-size: 0.875rem;
    color: var(--text-dark);
    font-weight: 500;
}

.software-demo {
    position: sticky;
    top: 100px;
    height: fit-content;
}

.demo-card {
    background-color: var(--bg-white);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: var(--shadow-md);
    text-align: center;
    border: 1px solid var(--border-color);
}

.demo-logo {
    margin-bottom: 1.5rem;
}

.demo-logo h3 {
    font-size: 1.75rem;
    margin-bottom: 0.5rem;
    font-weight: 700;
    color: var(--text-dark);
}

.demo-badge {
    display: inline-block;
    background-color: var(--primary-color);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.demo-card h3 {
    font-size: 1.5rem;
    margin-bottom: 2rem;
    font-weight: 600;
}

.demo-screenshot {
    background-color: var(--primary-color);
    color: white;
    padding: 3rem;
    border-radius: 8px;
    margin-bottom: 2rem;
}

.demo-screenshot i {
    font-size: 4rem;
    margin-bottom: 1rem;
}

.demo-screenshot p {
    font-size: 1.125rem;
    font-weight: 400;
}

.demo-features-list {
    text-align: left;
    margin: 1.5rem 0;
    padding: 1.5rem;
    background-color: var(--bg-light);
    border-radius: 6px;
}

.demo-features-list p {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
    font-size: 0.9375rem;
    color: var(--text-dark);
}

.demo-features-list p:last-child {
    margin-bottom: 0;
}

.demo-features-list i {
    color: var(--primary-color);
    font-size: 1rem;
}

/* 常见问题 */
.faq-section {
    padding: 5rem 0;
    background-color: var(--bg-white);
}

.faq-categories {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.faq-category {
    padding: 0.625rem 1.5rem;
    border: 1px solid var(--border-color);
    background-color: var(--bg-white);
    color: var(--text-dark);
    border-radius: 25px;
    cursor: pointer;
    transition: all 0.3s;
    font-size: 0.9375rem;
    font-weight: 500;
}

.faq-category:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.faq-category.active {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.faq-container {
    max-width: 900px;
    margin: 0 auto;
}

.faq-item {
    background-color: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    margin-bottom: 1rem;
    overflow: hidden;
    transition: all 0.3s;
}

.faq-item:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--primary-color);
}

.faq-question {
    padding: 1.5rem;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    user-select: none;
}

.faq-question h3 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-dark);
    padding-right: 1rem;
}

.faq-question i {
    color: var(--primary-color);
    transition: transform 0.3s;
    font-size: 1.125rem;
}

.faq-item.active .faq-question i {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease-out;
}

.faq-item.active .faq-answer {
    max-height: 1200px;
}

.faq-answer p {
    padding: 0 1.5rem 1.5rem;
    color: var(--text-light);
    line-height: 1.8;
    font-size: 0.9375rem;
}

.faq-answer p strong {
    color: var(--text-dark);
    font-weight: 600;
}

.faq-answer ul,
.faq-answer ol {
    padding: 0 1.5rem 1rem 3rem;
    color: var(--text-light);
    line-height: 1.8;
    font-size: 0.9375rem;
}

.faq-answer ul li,
.faq-answer ol li {
    margin-bottom: 0.5rem;
}

.faq-answer ul li strong,
.faq-answer ol li strong {
    color: var(--text-dark);
    font-weight: 600;
}

/* 联系我们 */
.contact-section {
    padding: 5rem 0;
    background-color: var(--bg-light);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.info-item {
    display: flex;
    gap: 1.5rem;
    background-color: var(--bg-white);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s;
    border: 1px solid var(--border-color);
}

.info-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.info-item i {
    font-size: 2rem;
    color: var(--primary-color);
    flex-shrink: 0;
}

.info-item h4 {
    font-size: 1.125rem;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
    font-weight: 600;
}

.info-item p {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
    color: var(--text-dark);
}

.info-item span {
    font-size: 0.875rem;
    color: var(--text-light);
}

.contact-form {
    background-color: var(--bg-white);
    padding: 2.5rem;
    border-radius: 8px;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
}

.contact-form h3 {
    font-size: 1.75rem;
    margin-bottom: 2rem;
    color: var(--text-dark);
    font-weight: 700;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.875rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 1rem;
    font-family: inherit;
    transition: all 0.3s;
    background-color: white;
    color: var(--text-dark);
}

.form-group input::placeholder,
.form-group select::placeholder,
.form-group textarea::placeholder {
    color: var(--text-light);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    background-color: white;
    box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.1);
}

.form-group textarea {
    resize: vertical;
}

/* 页脚 */
.footer {
    background-color: #2c3e50;
    color: white;
    padding: 3rem 0 1.5rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 2rem;
    margin-bottom: 2.5rem;
}

.footer-section h4 {
    font-size: 1.25rem;
    margin-bottom: 1.25rem;
    font-weight: 600;
}

.footer-section p {
    color: rgba(255, 255, 255, 0.85);
    line-height: 1.7;
    font-size: 0.9375rem;
}

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

.footer-section ul li {
    margin-bottom: 0.875rem;
}

.footer-section ul li a {
    color: rgba(255, 255, 255, 0.85);
    text-decoration: none;
    transition: color 0.3s;
    font-size: 0.9375rem;
}

.footer-section ul li a:hover {
    color: white;
}

.footer-section ul li i {
    margin-right: 0.625rem;
    color: white;
}

.footer-address {
    white-space: nowrap;
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-links a {
    width: 42px;
    height: 42px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.25rem;
    transition: all 0.3s;
}

.social-links a:hover {
    background-color: var(--primary-color);
    transform: translateY(-2px);
}

.footer-qr-code {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
    margin-top: 1.25rem;
}

.footer-qr-code img {
    width: 120px;
    height: 120px;
    padding: 0.375rem;
    background-color: white;
    object-fit: contain;
}

.footer-qr-code span {
    color: rgba(255, 255, 255, 0.85);
    font-size: 0.875rem;
}

.footer-bottom {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: center;
    gap: 1.5rem;
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.15);
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9375rem;
}

.footer-bottom p {
    margin: 0;
}

.footer-bottom .icp-record a {
    color: inherit;
    text-decoration: none;
}

/* 响应式设计 */
@media (max-width: 992px) {
    .software-content {
        grid-template-columns: 1fr;
    }

    .software-demo {
        position: static;
    }

    .contact-content {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 2rem 1.5rem;
    }

    .footer-address {
        white-space: normal;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: var(--bg-white);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: var(--shadow-lg);
        padding: 2rem 0;
    }

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

    .hamburger {
        display: flex;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .hero-features {
        grid-template-columns: 1fr;
    }

    .section-title {
        font-size: 2rem;
    }

    .devices-grid,
    .plans-grid {
        grid-template-columns: 1fr;
    }

    .software-feature {
        flex-direction: column;
        text-align: center;
    }

    .feature-icon {
        margin: 0 auto;
    }

    .footer-content {
        grid-template-columns: 1fr;
    }

    .footer-bottom {
        grid-template-columns: 1fr;
        gap: 0.5rem;
    }
}

/* 动画效果 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

/* 平滑滚动 */
html {
    scroll-behavior: smooth;
}

/* 选中文本样式 */
::selection {
    background-color: var(--primary-color);
    color: white;
}

/* PrinterMesh IoT系统样式 */
.printermesh-section {
    padding: 5rem 0;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
}

.printermesh-intro {
    margin-bottom: 4rem;
}

.printermesh-intro .intro-content {
    background: white;
    border-radius: 12px;
    padding: 3rem;
    box-shadow: var(--shadow-md);
}

.printermesh-intro .intro-text h3 {
    font-size: 1.75rem;
    color: var(--text-dark);
    margin-bottom: 1.25rem;
    font-weight: 600;
}

.printermesh-intro .intro-text p {
    font-size: 1.0625rem;
    line-height: 1.9;
    color: var(--text-light);
    margin-bottom: 2.5rem;
}

.printermesh-intro .intro-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.printermesh-intro .stat-item {
    text-align: center;
}

.printermesh-intro .stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.printermesh-intro .stat-label {
    font-size: 0.9375rem;
    color: var(--text-light);
    font-weight: 500;
}

.printermesh-features {
    margin-bottom: 4rem;
}

.printermesh-features .feature-group {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.printermesh-features .feature-item {
    background: white;
    border-radius: 12px;
    padding: 2.5rem;
    box-shadow: var(--shadow-md);
    transition: transform 0.3s, box-shadow 0.3s;
}

.printermesh-features .feature-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.printermesh-features .feature-header {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.printermesh-features .feature-icon-large {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.printermesh-features .feature-icon-large i {
    font-size: 2rem;
    color: white;
}

.printermesh-features .feature-header h3 {
    font-size: 1.5rem;
    color: var(--text-dark);
    font-weight: 600;
    margin: 0;
}

.printermesh-features .feature-body p {
    font-size: 1.0625rem;
    line-height: 1.8;
    color: var(--text-light);
    margin-bottom: 1.5rem;
}

.printermesh-features .feature-details {
    list-style: none;
    padding: 0;
}

.printermesh-features .feature-details > li {
    padding: 1rem 0;
    border-top: 1px solid var(--border-color);
    font-size: 0.9375rem;
    color: var(--text-dark);
}

.printermesh-features .feature-details > li:first-child {
    border-top: none;
    padding-top: 0;
}

.printermesh-features .feature-details strong {
    color: var(--primary-color);
    font-weight: 600;
}

.printermesh-features .sub-list {
    list-style: none;
    padding-left: 1.25rem;
    margin-top: 0.75rem;
}

.printermesh-features .sub-list li {
    padding: 0.375rem 0;
    position: relative;
    color: var(--text-light);
    font-size: 0.9375rem;
}

.printermesh-features .sub-list li:before {
    content: "•";
    color: var(--primary-color);
    font-weight: bold;
    position: absolute;
    left: -1rem;
}

.warning-level {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 4px;
    font-size: 0.875rem;
    font-weight: 500;
    margin: 0.25rem 0.5rem 0.25rem 0;
}

.warning-green {
    background-color: #d4edda;
    color: #155724;
}

.warning-yellow {
    background-color: #fff3cd;
    color: #856404;
}

.warning-orange {
    background-color: #ffe5cc;
    color: #cc5200;
}

.warning-red {
    background-color: #f8d7da;
    color: #721c24;
}

.printermesh-architecture {
    background: white;
    border-radius: 12px;
    padding: 3rem;
    margin-bottom: 4rem;
    box-shadow: var(--shadow-md);
}

.printermesh-architecture h3 {
    font-size: 1.75rem;
    color: var(--text-dark);
    margin-bottom: 2.5rem;
    text-align: center;
    font-weight: 600;
}

.architecture-diagram {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.arch-layer {
    background: #f8f9fa;
    border-radius: 8px;
    padding: 1.5rem;
    border: 2px solid var(--border-color);
}

.arch-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 1rem;
    text-align: center;
}

.arch-components {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
}

.arch-component {
    background: white;
    padding: 1rem;
    border-radius: 6px;
    text-align: center;
    border: 1px solid var(--border-color);
    transition: transform 0.2s, box-shadow 0.2s;
}

.arch-component:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.arch-component i {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
    display: block;
}

.arch-component span {
    font-size: 0.875rem;
    color: var(--text-dark);
    font-weight: 500;
}

.arch-arrow {
    text-align: center;
    padding: 0.5rem 0;
}

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

.printermesh-benefits {
    margin-bottom: 4rem;
}

.printermesh-benefits h3 {
    font-size: 1.75rem;
    color: var(--text-dark);
    margin-bottom: 2.5rem;
    text-align: center;
    font-weight: 600;
}

.benefits-comparison {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
}

.comparison-column {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.column-header {
    padding: 1.5rem;
    text-align: center;
    font-size: 1.25rem;
    font-weight: 600;
    color: white;
}

.column-header.traditional {
    background: linear-gradient(135deg, #6c757d, #495057);
}

.column-header.smart {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
}

.comparison-item {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: flex-start;
    gap: 1rem;
}

.comparison-item:last-child {
    border-bottom: none;
}

.comparison-item i {
    font-size: 1.25rem;
    margin-top: 0.25rem;
    flex-shrink: 0;
}

.comparison-item .fa-times-circle {
    color: #dc3545;
}

.comparison-item .fa-check-circle {
    color: #28a745;
}

.comparison-item p {
    margin: 0;
    font-size: 0.9375rem;
    line-height: 1.6;
    color: var(--text-dark);
}

.printermesh-cta {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border-radius: 12px;
    padding: 3rem;
    text-align: center;
    box-shadow: var(--shadow-lg);
}

.printermesh-cta .cta-content h3 {
    font-size: 2rem;
    color: white;
    margin-bottom: 1rem;
    font-weight: 600;
}

.printermesh-cta .cta-content p {
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 2rem;
}

.btn-large {
    font-size: 1.125rem;
    padding: 1rem 3rem !important;
}

/* 响应式设计 - PrinterMesh */
@media (max-width: 768px) {
    .printermesh-intro .intro-content {
        padding: 2rem;
    }

    .printermesh-intro .intro-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
    }

    .printermesh-features .feature-item {
        padding: 1.5rem;
    }

    .printermesh-features .feature-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .printermesh-features .feature-icon-large {
        width: 60px;
        height: 60px;
    }

    .printermesh-features .feature-icon-large i {
        font-size: 1.5rem;
    }

    .printermesh-architecture {
        padding: 2rem;
    }

    .arch-components {
        grid-template-columns: 1fr;
    }

    .benefits-comparison {
        grid-template-columns: 1fr;
    }

    .printermesh-cta {
        padding: 2rem;
    }

    .printermesh-cta .cta-content h3 {
        font-size: 1.5rem;
    }

    .printermesh-cta .cta-content p {
        font-size: 1rem;
    }
}