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

:root {
    --primary-color: #0068B7;
    --secondary-color: #2EC4B6;
    --accent-color: #00B4A6;
    --dark-bg: #0D1B2A;
    --light-bg: #F0F7FA;
    --text-dark: #1A2E4A;
    --text-light: #5A6B7D;
    --border-color: #D4E0E8;
    --shadow: 0 4px 20px rgba(13, 27, 42, 0.1);
    --shadow-lg: 0 10px 40px rgba(13, 27, 42, 0.15);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    overflow-x: hidden;
}

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

/* 导航栏 */
.navbar {
    background: linear-gradient(135deg, var(--dark-bg) 0%, #003a66 100%);
    color: white;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow);
}

.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0;
    text-decoration: none;
}

.logo-img {
    height: 40px;
    width: auto;
}

.logo-text {
    display: none; /* Hidden when logo image is used */
    letter-spacing: 2px;
}

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

.nav-link {
    color: white;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--secondary-color);
    transition: width 0.3s ease;
}

.nav-link:hover::after {
    width: 100%;
}

.language-switcher {
    display: flex;
    align-items: center;
    gap: 0.2rem;
}

.lang-option {
    padding: 0.3rem 0.5rem;
    background: transparent;
    color: rgba(255, 255, 255, 0.6);
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    transition: color 0.3s ease;
    user-select: none;
}

.lang-option.active {
    color: var(--secondary-color);
    font-weight: 700;
}

.lang-option:hover {
    color: white;
}

.lang-divider {
    color: rgba(255, 255, 255, 0.4);
    font-size: 0.9rem;
    user-select: none;
}

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

.hamburger span {
    width: 25px;
    height: 3px;
    background: white;
    border-radius: 2px;
    transition: all 0.3s ease;
}

/* 下拉菜单 */
.dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: white;
    border-radius: 8px;
    box-shadow: var(--shadow-lg);
    min-width: 200px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    z-index: 100;
    margin-top: 0.5rem;
}

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

.dropdown-item {
    display: block;
    padding: 1rem 1.5rem;
    color: var(--text-dark);
    text-decoration: none;
    transition: all 0.3s ease;
    border-bottom: 1px solid var(--border-color);
    font-weight: 500;
}

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

.dropdown-item:hover {
    background: var(--light-bg);
    color: var(--primary-color);
    padding-left: 2rem;
}

/* Hero Section */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    padding: 100px 0;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: #ffffff;
    z-index: 0;
}

.hero-background::before {
    content: '';
    position: absolute;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(46, 196, 182, 0.12) 0%, transparent 70%);
    top: -200px;
    right: -100px;
    border-radius: 50%;
}

.hero-background::after {
    content: '';
    position: absolute;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(0, 104, 183, 0.08) 0%, transparent 70%);
    bottom: -100px;
    left: -50px;
    border-radius: 50%;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    color: var(--text-dark);
    max-width: 800px;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    line-height: 1.2;
    animation: fadeInUp 0.8s ease-out;
}

.hero-subtitle {
    font-size: 1.5rem;
    margin-bottom: 2.5rem;
    color: var(--text-light);
    animation: fadeInUp 0.8s ease-out 0.2s both;
}

.hero-buttons {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    animation: fadeInUp 0.8s ease-out 0.4s both;
}

.btn {
    padding: 1rem 2.5rem;
    border: none;
    border-radius: 50px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
}

.btn-primary {
    background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
    color: white;
    box-shadow: 0 8px 25px rgba(46, 196, 182, 0.35);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 35px rgba(46, 196, 182, 0.45);
}

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

.btn-secondary:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-3px);
}

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

/* 通用section样式 */
section {
    padding: 80px 0;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 3rem;
    color: var(--dark-bg);
    position: relative;
    padding-bottom: 1rem;
}

.section-title::after {
    content: '';
    position: absolute;
    width: 80px;
    height: 4px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    border-radius: 2px;
}

/* 演示体验区域 */
.demo-section {
    background: linear-gradient(135deg, #EFF6F5, #E4F0EF);
    position: relative;
}

.demo-section::before {
    content: '';
    position: absolute;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(0, 104, 183, 0.1) 0%, transparent 70%);
    top: 50px;
    right: -100px;
    border-radius: 50%;
    z-index: 0;
}

.demo-section::after {
    content: '';
    position: absolute;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(46, 196, 182, 0.1) 0%, transparent 70%);
    bottom: 100px;
    left: -50px;
    border-radius: 50%;
    z-index: 0;
}

.demo-subtitle {
    font-size: 1.2rem;
    color: var(--text-light);
    text-align: center;
    margin-bottom: 3rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.demo-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-bottom: 4rem;
    position: relative;
    z-index: 1;
}

.demo-card {
    background: white;
    border-radius: 12px;
    padding: 2rem;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
    text-align: center;
}

.demo-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
    border-color: var(--secondary-color);
}

.demo-card-icon {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    display: block;
}

.demo-card-title {
    font-size: 1.3rem;
    color: var(--primary-color);
    margin-bottom: 0.8rem;
    font-weight: 700;
}

.demo-card-desc {
    color: var(--text-light);
    margin-bottom: 1.5rem;
    font-size: 0.95rem;
    line-height: 1.6;
}

.demo-video {
    width: 100%;
    height: auto;
    border-radius: 8px;
    margin: 1rem 0;
    background: #000;
    max-height: 200px;
}

.trial-features,
.experience-features,
.consultation-benefits {
    text-align: left;
    margin: 1.5rem 0;
    padding: 1rem;
    background: var(--light-bg);
    border-radius: 8px;
}

.trial-features p,
.experience-features p,
.consultation-benefits p {
    color: var(--text-dark);
    margin: 0.5rem 0;
    font-size: 0.9rem;
    font-weight: 500;
}

.btn-outline {
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
    margin-top: 1rem;
}

.btn-outline:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
}

/* 快速开始 */
.quick-start {
    background: white;
    border-radius: 12px;
    padding: 3rem 2rem;
    box-shadow: var(--shadow);
    position: relative;
    z-index: 1;
}

.quick-start-title {
    font-size: 1.8rem;
    color: var(--primary-color);
    text-align: center;
    margin-bottom: 2.5rem;
    font-weight: 700;
}

.start-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.step {
    text-align: center;
    padding: 1.5rem;
    background: var(--light-bg);
    border-radius: 8px;
    transition: all 0.3s ease;
}

.step:hover {
    background: linear-gradient(135deg, rgba(0, 104, 183, 0.08), rgba(46, 196, 182, 0.08));
    transform: translateY(-5px);
}

.step-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border-radius: 50%;
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.step h4 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

.step p {
    color: var(--text-light);
    font-size: 0.9rem;
}

/* 关于我们 */
.about {
    background: var(--light-bg);
}

.about-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.about-card {
    background: white;
    padding: 2.5rem;
    border-radius: 12px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
}

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

.card-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.about-card h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.about-card p {
    color: var(--text-light);
    line-height: 1.8;
}

/* 公司结构 */
.company-structure {
    margin-top: 3rem;
    padding: 3rem;
    background: white;
    border-radius: 12px;
    box-shadow: var(--shadow);
}

.structure-title {
    font-size: 1.8rem;
    color: var(--primary-color);
    text-align: center;
    margin-bottom: 2.5rem;
    font-weight: 700;
}

.structure-content {
    display: flex;
    align-items: center;
    gap: 2rem;
    flex-wrap: wrap;
    justify-content: center;
}

.company-info {
    display: flex;
    align-items: flex-start;
    gap: 1.5rem;
    padding: 2rem;
    background: linear-gradient(135deg, #EFF6F5, #E4F0EF);
    border-radius: 12px;
    border: 1px solid var(--border-color);
    flex: 1;
    min-width: 300px;
    max-width: 400px;
    transition: all 0.3s ease;
}

.company-info:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow);
    border-color: var(--secondary-color);
}

.company-icon {
    font-size: 2.5rem;
    min-width: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.company-details {
    flex: 1;
}

.company-details h4 {
    font-size: 1.1rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
    font-weight: 700;
}

.company-name {
    font-size: 1.3rem;
    color: var(--secondary-color);
    font-weight: 700;
    margin-bottom: 0.8rem;
}

.company-desc {
    color: var(--text-light);
    font-size: 0.95rem;
    line-height: 1.6;
    margin: 0;
}

.structure-arrow {
    font-size: 2rem;
    color: var(--primary-color);
    font-weight: 700;
    display: flex;
    align-items: center;
    white-space: nowrap;
    animation: arrowPulse 2s infinite;
}

@keyframes arrowPulse {
    0%, 100% {
        opacity: 0.6;
        transform: scaleX(1);
    }
    50% {
        opacity: 1;
        transform: scaleX(1.2);
    }
}

@media (max-width: 768px) {
    .structure-content {
        flex-direction: column;
        gap: 1rem;
    }

    .company-info {
        min-width: auto;
        max-width: none;
    }

    .structure-arrow {
        transform: rotate(90deg);
        margin: 0;
    }
}
.products {
    background: white;
}

.product-section {
    margin-bottom: 4rem;
    padding: 2rem;
    background: var(--light-bg);
    border-radius: 12px;
    border-left: 4px solid var(--primary-color);
}

.product-header {
    display: flex;
    align-items: flex-start;
    gap: 2rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.product-icon {
    font-size: 3rem;
    min-width: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.product-icon.large {
    font-size: 4rem;
}

.product-info h3 {
    font-size: 1.8rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.product-tagline {
    color: var(--secondary-color);
    font-weight: 600;
    font-size: 1.1rem;
}

.product-details {
    background: white;
    padding: 2rem;
    border-radius: 8px;
}

.product-description {
    margin-bottom: 2rem;
    padding-bottom: 2rem;
    border-bottom: 2px solid var(--light-bg);
}

.product-description h4 {
    color: var(--primary-color);
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}

.product-description p {
    color: var(--text-light);
    line-height: 1.8;
    font-size: 1.05rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.feature-item {
    padding: 1.5rem;
    background: var(--light-bg);
    border-radius: 8px;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.feature-item:hover {
    border-color: var(--primary-color);
    background: linear-gradient(135deg, rgba(0, 104, 183, 0.06), rgba(46, 196, 182, 0.06));
    transform: translateY(-5px);
}

.feature-icon {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.feature-item h4 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

.feature-item p {
    color: var(--text-light);
    font-size: 0.95rem;
}

.benefits {
    background: linear-gradient(135deg, rgba(0, 104, 183, 0.1), rgba(46, 196, 182, 0.06));
    padding: 2rem;
    border-radius: 8px;
}

.benefits h4 {
    color: var(--primary-color);
    font-size: 1.2rem;
    margin-bottom: 1rem;
}

.benefits-list {
    list-style: none;
}

.benefits-list li {
    padding: 0.8rem 0;
    color: var(--text-dark);
    font-weight: 500;
    border-bottom: 1px solid rgba(0, 104, 183, 0.2);
}

.benefits-list li:last-child {
    border-bottom: none;
}

/* 订阅体系简介（产品详情内） */
.subscription-intro {
    margin-top: 2rem;
    padding: 2rem;
    background: linear-gradient(135deg, rgba(46, 196, 182, 0.08), rgba(0, 104, 183, 0.08));
    border-radius: 12px;
    border: 1px dashed var(--secondary-color);
    text-align: center;
}

.subscription-intro h4 {
    font-size: 1.3rem;
    color: var(--primary-color);
    margin-bottom: 0.8rem;
}

.subscription-intro p {
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 1.2rem;
    font-size: 0.95rem;
}

.btn-sm {
    padding: 0.6rem 1.5rem;
    font-size: 0.95rem;
}

/* ============================================================
   Pricing / 订阅方案
   ============================================================ */
.pricing {
    background: linear-gradient(180deg, var(--light-bg) 0%, #fff 100%);
    padding: 80px 0;
}

.pricing-subtitle {
    text-align: center;
    color: var(--text-light);
    font-size: 1.1rem;
    margin-bottom: 3rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    align-items: stretch;
    margin-bottom: 2rem;
}

.pricing-card {
    background: #fff;
    border-radius: 16px;
    padding: 2.5rem 2rem;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
    transition: all 0.3s ease;
    position: relative;
}

.pricing-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

/* Recommended card */
.pricing-card.recommended {
    border: 2px solid #7C5CFC;
    box-shadow: 0 10px 40px rgba(124, 92, 252, 0.15);
    background: linear-gradient(180deg, #FAFAFF 0%, #fff 100%);
}

.pricing-card.recommended:hover {
    box-shadow: 0 16px 50px rgba(124, 92, 252, 0.25);
}

.pricing-badge {
    position: absolute;
    top: -14px;
    right: 24px;
    background: linear-gradient(135deg, #7C5CFC, #9B7DFF);
    color: #fff;
    padding: 0.35rem 1.2rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.5px;
    box-shadow: 0 4px 12px rgba(124, 92, 252, 0.3);
}

.pricing-card-header {
    text-align: center;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 1.5rem;
}

.pricing-tier {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 0.3rem;
}

.pricing-audience {
    font-size: 0.9rem;
    color: var(--text-light);
    margin-bottom: 1rem;
}

.pricing-amount {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 2px;
}

.price-currency {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-dark);
}

.price-value {
    font-size: 3.2rem;
    font-weight: 800;
    color: var(--text-dark);
    line-height: 1;
}

.pricing-card.recommended .price-value {
    color: #7C5CFC;
}

.price-period {
    font-size: 1rem;
    color: var(--text-light);
    margin-left: 4px;
}

.pricing-features {
    list-style: none;
    flex: 1;
    padding: 0;
    margin: 0 0 1.5rem 0;
}

.pricing-features li {
    padding: 0.6rem 0;
    color: var(--text-dark);
    font-size: 0.95rem;
    line-height: 1.5;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.pricing-features li:last-child {
    border-bottom: none;
}

.pricing-btn {
    width: 100%;
    text-align: center;
    margin-top: auto;
}

.pricing-note {
    text-align: center;
    color: var(--text-light);
    font-size: 0.9rem;
    margin-top: 1rem;
    font-style: italic;
}

/* Pricing responsive */
@media (max-width: 900px) {
    .pricing-grid {
        grid-template-columns: 1fr;
        max-width: 420px;
        margin-left: auto;
        margin-right: auto;
    }
    
    .pricing-card.recommended {
        order: -1;
    }
}

/* 愿景与目标 */
.vision {
    background: var(--light-bg);
}

.vision-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.vision-card {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    border-top: 3px solid var(--primary-color);
    box-shadow: var(--shadow);
}

.vision-card h3 {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    font-size: 1.3rem;
}

.vision-list {
    list-style: none;
}

.vision-list li {
    padding: 0.8rem 0;
    color: var(--text-dark);
    line-height: 1.6;
    border-bottom: 1px solid var(--border-color);
}

.vision-list li:last-child {
    border-bottom: none;
}

.roadmap {
    background: white;
    padding: 2.5rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
}

.roadmap h3 {
    text-align: center;
    color: var(--primary-color);
    margin-bottom: 2rem;
    font-size: 1.5rem;
}

.roadmap-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
}

.roadmap-item {
    text-align: center;
    padding: 1.5rem;
    background: var(--light-bg);
    border-radius: 8px;
    border: 2px solid var(--border-color);
    transition: all 0.3s ease;
}

.roadmap-item:hover {
    border-color: var(--primary-color);
    background: linear-gradient(135deg, rgba(0, 104, 183, 0.08), rgba(46, 196, 182, 0.08));
}

.roadmap-date {
    color: var(--primary-color);
    font-weight: 700;
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

.roadmap-milestone p {
    color: var(--text-dark);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* 联系我们 */
.contact {
    background: linear-gradient(135deg, var(--dark-bg), #0A2540);
    color: white;
}

.contact .section-title {
    color: white;
}

.contact .section-title::after {
    background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
}

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

.contact-info {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.info-item h4 {
    color: var(--secondary-color);
    margin-bottom: 0.5rem;
}

.info-item p {
    color: rgba(255, 255, 255, 0.8);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.contact-form textarea,
.contact-form input {
    padding: 1rem;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: white;
    border-radius: 6px;
    font-family: inherit;
    transition: all 0.3s ease;
}

.contact-form textarea::placeholder,
.contact-form input::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

.contact-form textarea:focus,
.contact-form input:focus {
    outline: none;
    background: rgba(255, 255, 255, 0.15);
    border-color: var(--secondary-color);
    box-shadow: 0 0 10px rgba(46, 196, 182, 0.25);
}

.contact-form textarea {
    min-height: 150px;
    resize: vertical;
}

/* 页脚 */
.footer {
    background: var(--dark-bg);
    color: white;
    padding: 3rem 0 2rem;
    text-align: center;
}

/* Standalone subpage sections - extra top padding for fixed navbar */
.subpage-section {
    padding-top: 120px !important;
    min-height: 60vh;
}

.footer-page-links {
    display: flex;
    justify-content: flex-start;
    gap: 2rem;
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-page-link {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    transition: color 0.3s ease;
}

.footer-page-link:hover {
    color: var(--secondary-color);
}

.footer-company-info {
    margin-bottom: 2rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-section h4 {
    font-size: 1.1rem;
    color: var(--secondary-color);
    margin-bottom: 1rem;
    font-weight: 700;
}

.footer-companies {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    max-width: 600px;
    margin: 0 auto;
}

.footer-company {
    padding: 1rem;
    background: rgba(46, 196, 182, 0.08);
    border-radius: 8px;
    border: 1px solid rgba(46, 196, 182, 0.25);
}

.company-title {
    font-weight: 700;
    color: var(--secondary-color);
    margin: 0 0 0.5rem 0;
    font-size: 1rem;
}

.company-role {
    color: rgba(255, 255, 255, 0.7);
    margin: 0;
    font-size: 0.9rem;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 2rem;
}

.footer-links {
    display: flex;
    gap: 2rem;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

/* 响应式设计 */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    .nav-menu {
        display: none;
    }

    .dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        background: #0054A0;
        border-radius: 0;
        min-width: auto;
    }

    .dropdown-item {
        color: white;
        border-bottom: 1px solid #0A2540;
        padding: 0.8rem 1.5rem;
    }

    .dropdown-item:hover {
        background: #0A2540;
        color: var(--secondary-color);
        padding-left: 1.5rem;
    }

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

    .hero-subtitle {
        font-size: 1.1rem;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
    }

    .section-title {
        font-size: 1.8rem;
    }

    .demo-grid {
        grid-template-columns: 1fr;
    }

    .start-steps {
        grid-template-columns: repeat(2, 1fr);
    }

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

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

    .about-grid,
    .features-grid,
    .vision-content {
        grid-template-columns: 1fr;
    }

    .product-header {
        flex-direction: column;
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
    }

    .footer-links {
        flex-direction: column;
        gap: 1rem;
    }

    .demo-section::before,
    .demo-section::after {
        display: none;
    }

    .quick-start {
        padding: 2rem 1rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

    .hero-title {
        font-size: 1.5rem;
    }

    .hero-subtitle {
        font-size: 0.95rem;
    }

    .nav-menu,
    .language-switcher {
        flex-direction: column;
    }

    section {
        padding: 40px 0;
    }

    .section-title {
        font-size: 1.5rem;
    }
}

/* 深色模式支持 */
@media (prefers-color-scheme: dark) {
    body {
        background: #1a1a1a;
        color: #f0f0f0;
    }

    .about,
    .vision {
        background: #2a2a2a;
    }

    .about-card,
    .vision-card,
    .product-details {
        background: #1a1a1a;
        border-color: #444;
        color: #f0f0f0;
    }

    .about-card p,
    .feature-item p {
        color: #ccc;
    }
}

/* 动画 */
@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

.about-card,
.feature-item,
.roadmap-item {
    animation: fadeIn 0.6s ease-out;
}

.about-card:nth-child(1) {
    animation-delay: 0.1s;
}

.about-card:nth-child(2) {
    animation-delay: 0.2s;
}

.about-card:nth-child(3) {
    animation-delay: 0.3s;
}

/* ============================================================
   Media Showcase / Carousel
   ============================================================ */
.media-showcase {
    background: #ffffff;
    padding: 60px 0 80px;
    position: relative;
    overflow: hidden;
}

.media-showcase::before {
    content: '';
    position: absolute;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(46, 196, 182, 0.06) 0%, transparent 60%);
    top: -400px;
    left: 50%;
    transform: translateX(-50%);
    border-radius: 50%;
    pointer-events: none;
}

.media-showcase .section-title {
    color: var(--dark-bg);
    margin-bottom: 0.8rem;
}

.media-showcase .section-title::after {
    background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
}

.showcase-subtitle {
    color: var(--text-light);
    text-align: center;
    font-size: 1.1rem;
    margin-bottom: 3rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* Carousel Container */
.carousel-container {
    position: relative;
    max-width: 960px;
    margin: 0 auto;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
    background: #000;
}

.carousel-track {
    display: flex;
    transition: transform 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    will-change: transform;
}

.carousel-slide {
    min-width: 100%;
    position: relative;
    aspect-ratio: 16 / 9;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.carousel-slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.carousel-slide video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Placeholder slide styling */
.carousel-slide .slide-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: rgba(255, 255, 255, 0.9);
    text-align: center;
    padding: 2rem;
    position: relative;
}

.carousel-slide:nth-child(1) .slide-placeholder {
    background: linear-gradient(135deg, #0D1B2A 0%, #0068B7 50%, #2EC4B6 100%);
}
.carousel-slide:nth-child(2) .slide-placeholder {
    background: linear-gradient(135deg, #0A2540 0%, #00B4A6 50%, #2EC4B6 100%);
}
.carousel-slide:nth-child(3) .slide-placeholder {
    background: linear-gradient(135deg, #0068B7 0%, #0D1B2A 50%, #00B4A6 100%);
}
.carousel-slide:nth-child(4) .slide-placeholder {
    background: linear-gradient(135deg, #2EC4B6 0%, #0068B7 50%, #0D1B2A 100%);
}
.carousel-slide:nth-child(5) .slide-placeholder {
    background: linear-gradient(135deg, #00B4A6 0%, #0A2540 50%, #0068B7 100%);
}

.slide-placeholder .slide-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
    filter: drop-shadow(0 4px 8px rgba(0,0,0,0.3));
}

.slide-placeholder .slide-title {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    text-shadow: 0 2px 10px rgba(0,0,0,0.3);
}

.slide-placeholder .slide-desc {
    font-size: 1.05rem;
    opacity: 0.85;
    max-width: 500px;
    line-height: 1.6;
}

/* Carousel Navigation Arrows */
.carousel-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 48px;
    height: 48px;
    border-radius: 50%;
    border: 2px solid rgba(255, 255, 255, 0.5);
    background: rgba(13, 27, 42, 0.6);
    color: white;
    font-size: 1.4rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
    transition: all 0.3s ease;
    backdrop-filter: blur(8px);
}

.carousel-btn:hover {
    background: rgba(46, 196, 182, 0.8);
    border-color: var(--secondary-color);
    transform: translateY(-50%) scale(1.1);
}

.carousel-btn-prev {
    left: 16px;
}

.carousel-btn-next {
    right: 16px;
}

/* Carousel Dots / Indicators */
.carousel-dots {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 1.5rem;
}

.carousel-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    border: 2px solid rgba(0, 104, 183, 0.3);
    background: transparent;
    cursor: pointer;
    transition: all 0.3s ease;
    padding: 0;
}

.carousel-dot.active {
    background: var(--secondary-color);
    border-color: var(--secondary-color);
    transform: scale(1.2);
    box-shadow: 0 0 12px rgba(46, 196, 182, 0.5);
}

.carousel-dot:hover {
    border-color: var(--secondary-color);
    background: rgba(46, 196, 182, 0.4);
}

/* Carousel progress bar */
.carousel-progress {
    position: absolute;
    bottom: 0;
    left: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--secondary-color), var(--primary-color));
    transition: width 0.3s linear;
    z-index: 10;
}

/* Slide caption overlay */
.slide-caption {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 2rem 1.5rem 1.5rem;
    background: linear-gradient(transparent, rgba(13, 27, 42, 0.85));
    color: white;
    z-index: 5;
}

.slide-caption h4 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.3rem;
}

.slide-caption p {
    font-size: 0.9rem;
    opacity: 0.8;
}

/* Showcase category tabs */
.showcase-tabs {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 2rem;
}

.showcase-tab {
    padding: 0.5rem 1.5rem;
    border-radius: 50px;
    border: 1px solid var(--border-color);
    background: rgba(0, 104, 183, 0.05);
    color: var(--text-light);
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 500;
    transition: all 0.3s ease;
}

.showcase-tab.active {
    background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
    border-color: transparent;
    color: white;
}

.showcase-tab:hover {
    border-color: var(--secondary-color);
    color: var(--text-dark);
}

/* Responsive carousel */
@media (max-width: 768px) {
    .media-showcase {
        padding: 40px 0 60px;
    }

    .carousel-btn {
        width: 36px;
        height: 36px;
        font-size: 1rem;
    }

    .carousel-btn-prev {
        left: 8px;
    }

    .carousel-btn-next {
        right: 8px;
    }

    .slide-placeholder .slide-title {
        font-size: 1.3rem;
    }

    .slide-placeholder .slide-desc {
        font-size: 0.9rem;
    }

    .showcase-tabs {
        flex-wrap: wrap;
        gap: 0.5rem;
    }

    .showcase-tab {
        padding: 0.4rem 1rem;
        font-size: 0.85rem;
    }
}

@media (max-width: 480px) {
    .slide-placeholder .slide-icon {
        font-size: 2.5rem;
    }

    .slide-placeholder .slide-title {
        font-size: 1.1rem;
    }

    .carousel-dots {
        gap: 6px;
    }

    .carousel-dot {
        width: 10px;
        height: 10px;
    }
}