/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #fff;
}

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

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    z-index: 1000;
    transition: all 0.3s ease;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo {
    width: 130px;
    height: 40px;
}

.logo-text {
    font-size: 24px;
    font-weight: 700;
    color: #FF7043;
}

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

.nav-link {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav-link:hover {
    color: #FF7043;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: #FF7043;
    transition: width 0.3s ease;
}

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

.language-selector select {
    background: none;
    border: 1px solid #ddd;
    padding: 5px 10px;
    border-radius: 5px;
    font-size: 14px;
    cursor: pointer;
}

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

.bar {
    width: 25px;
    height: 3px;
    background: #333;
    margin: 3px 0;
    transition: 0.3s;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    position: relative;
    display: flex;
    align-items: center;
    overflow: hidden;
    padding-top: 70px;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -2;
}

.hero-bg-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        135deg,
        rgba(102, 126, 234, 0.4) 0%,
        rgba(118, 75, 162, 0.3) 50%,
        rgba(0, 0, 0, 0.2) 100%
    );
    z-index: -1;
}

.hero-container {
    display: flex;
    justify-content: center;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    position: relative;
    z-index: 1;
    min-height: calc(100vh - 70px);
}

.hero-content {
    text-align: center;
    max-width: 900px;
    padding: 80px 60px;
    animation: fadeInUp 1s ease-out;
    position: relative;
}

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

.hero-title {
    font-size: 4.5rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
    color: #3f3f3f;
    text-shadow: 
        0 4px 12px rgba(255,255,255,0.9), 
        0 2px 6px rgba(255,255,255,0.7),
        0 1px 3px rgba(255,255,255,0.5);
    line-height: 1.1;
    position: relative;
    display: inline-block;
}

.hero-title::before {
    content: '';
    position: absolute;
    top: -10px;
    left: -20px;
    right: -20px;
    bottom: -10px;
    background: rgba(255, 255, 255, 0.85);
    z-index: -1;
    border-radius: 15px;
    filter: blur(15px);
    box-shadow: 0 4px 20px rgba(255, 255, 255, 0.3);
}

.hero-subtitle {
    font-size: 1.4rem;
    color: #666;
    line-height: 1.7;
    margin-bottom: 3.5rem;
    text-shadow: 
        0 3px 10px rgba(255,255,255,0.8), 
        0 2px 5px rgba(255,255,255,0.6),
        0 1px 2px rgba(255,255,255,0.4);
    font-weight: 400;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    position: relative;
    padding: 15px 25px;
}

.hero-subtitle::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.75);
    z-index: -1;
    border-radius: 12px;
    filter: blur(12px);
    box-shadow: 0 3px 15px rgba(255, 255, 255, 0.2);
}

.hero-buttons {
    display: flex;
    gap: 25px;
    flex-wrap: wrap;
    justify-content: center;
}

.btn {
    display: inline-flex;
    padding: 18px 40px;
    border-radius: 12px;
    text-decoration: none;
    font-weight: 600;
    font-size: 17px;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    text-align: center;
    text-rendering: optimizeLegibility;
    align-items: center;
    justify-content: center;
    min-width: 160px;
}

.btn-primary {
    background: linear-gradient(135deg, #FF7043, #ff8a65);
    color: white;
    box-shadow: 
        0 6px 20px rgba(255, 112, 67, 0.4),
        0 3px 8px rgba(0, 0, 0, 0.3);
    border: none;
}

.btn-primary:hover {
    background: linear-gradient(135deg, #e55a2b, #ff7043);
    transform: translateY(-4px);
    box-shadow: 
        0 10px 30px rgba(255, 112, 67, 0.5),
        0 5px 15px rgba(0, 0, 0, 0.4);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.9);
    color: #666;
    border: 2px solid rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    box-shadow: 
        0 4px 15px rgba(255, 255, 255, 0.3),
        0 2px 6px rgba(0, 0, 0, 0.1);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 1);
    color: #1a1a1a;
    border-color: white;
    transform: translateY(-4px);
    box-shadow: 
        0 8px 25px rgba(255, 255, 255, 0.4),
        0 4px 12px rgba(0, 0, 0, 0.15);
}

.hero-visual {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-image-container {
    position: relative;
    width: 100%;
    max-width: 500px;
}

.hero-devices {
    position: relative;
    width: 400px;
    height: 400px;
    opacity: 0.9;
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
}

.device {
    position: absolute;
    width: 80px;
    height: 80px;
    background: rgba(255, 255, 255, 0.95);
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.device i {
    font-size: 30px;
    color: #FF7043;
}

.device:hover {
    transform: scale(1.1);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.3);
    background: rgba(255, 255, 255, 1);
    border-color: rgba(102, 126, 234, 0.5);
}

.phone {
    top: 50px;
    left: 50px;
    animation: float 3s ease-in-out infinite;
}

.tablet {
    top: 50px;
    right: 50px;
    animation: float 3s ease-in-out infinite 0.5s;
}

.laptop {
    bottom: 50px;
    left: 50px;
    animation: float 3s ease-in-out infinite 1s;
}

.tv {
    bottom: 50px;
    right: 50px;
    animation: float 3s ease-in-out infinite 1.5s;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
}

/* Stats Section */
.stats {
    padding: 80px 0;
    background: white;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    text-align: center;
}

.stat-item {
    padding: 20px;
}

.stat-number {
    font-size: 3rem;
    font-weight: 700;
    color: #FF7043;
    margin-bottom: 10px;
}

.stat-label {
    font-size: 1.1rem;
    color: #666;
    font-weight: 500;
}

/* Section Styles */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: #1a1a1a;
    margin-bottom: 15px;
}

.section-subtitle {
    font-size: 1.2rem;
    color: #666;
    max-width: 680px;
    margin: 0 auto;
}

/* Products Section */
.products {
    padding: 100px 0;
    background: #f8f9fa;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 40px;
}

.product-category {
    background: white;
    padding: 40px 30px;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
    text-align: center;
}

.product-category:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.12);
}

.category-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #FF7043, #ff8a65);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
}

.category-icon i {
    font-size: 35px;
    color: white;
}

.category-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: #1a1a1a;
    margin-bottom: 25px;
}

.product-list {
    text-align: left;
}

.product-item {
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 1px solid #eee;
}

.product-item:last-child {
    border-bottom: none;
    margin-bottom: 0;
}

.product-item h4 {
    font-size: 1.1rem;
    font-weight: 600;
    color: #333;
    margin-bottom: 5px;
}

.product-item p {
    font-size: 0.95rem;
    color: #666;
    line-height: 1.5;
}

/* Brand Partnership Section */
.brand-partnership {
    padding: 100px 0;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    position: relative;
    overflow: hidden;
}

.brand-partnership::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="%23FF704320" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    opacity: 0.3;
}

.partnership-content {
    position: relative;
    z-index: 1;
}

.partnership-hero {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    margin-bottom: 80px;
}

.partnership-text h3 {
    font-size: 2.5rem;
    font-weight: 700;
    color: #2c3e50;
    margin-bottom: 20px;
    line-height: 1.2;
}

.partnership-text p {
    font-size: 1.2rem;
    color: #6c757d;
    line-height: 1.6;
    margin-bottom: 40px;
}

.partnership-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.partnership-stats .stat {
    text-align: center;
    transition: all 0.3s ease;
    padding: 20px;
    border-radius: 15px;
    cursor: pointer;
}

.partnership-stats .stat:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.8);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.partnership-stats .stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: #667eea;
    display: block;
    background: linear-gradient(135deg, #667eea, #764ba2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    transition: all 0.3s ease;
}

/* 不同统计数据的多彩配色 */
.partnership-stats .stat:nth-child(1) .stat-number {
    background: linear-gradient(135deg, #667eea, #764ba2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.partnership-stats .stat:nth-child(2) .stat-number {
    background: linear-gradient(135deg, #28a745, #20c997);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.partnership-stats .stat:nth-child(3) .stat-number {
    background: linear-gradient(135deg, #007bff, #6610f2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.partnership-stats .stat:nth-child(4) .stat-number {
    background: linear-gradient(135deg, #fd7e14, #e83e8c);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* 悬停时的渐变动画效果 */
.partnership-stats .stat:hover .stat-number {
    transform: scale(1.1);
    filter: brightness(1.2);
}

.partnership-stats .stat:nth-child(1):hover .stat-number {
    background: linear-gradient(135deg, #764ba2, #667eea);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.partnership-stats .stat:nth-child(2):hover .stat-number {
    background: linear-gradient(135deg, #20c997, #28a745);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.partnership-stats .stat:nth-child(3):hover .stat-number {
    background: linear-gradient(135deg, #6610f2, #007bff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.partnership-stats .stat:nth-child(4):hover .stat-number {
    background: linear-gradient(135deg, #e83e8c, #fd7e14);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.partnership-stats .stat-label {
    font-size: 0.9rem;
    color: #6c757d;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-top: 5px;
}

.brand-ecosystem {
    position: relative;
    width: 400px;
    height: 400px;
    margin: 0 auto;
}

.center-logo {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100px;
    height: 100px;
    background: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
    border: 1px solid #e9ecef;
    z-index: 2;
    transition: all 0.3s ease;
}

.center-logo:hover {
    transform: translate(-50%, -50%) translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    border-color: #dee2e6;
}

.ecosystem-logo {
    width: 80px;
    height: 60px;
}

.brand-icons {
    position: relative;
    width: 100%;
    height: 100%;
}

.brand-icon {
    position: absolute;
    width: 60px;
    height: 60px;
    background: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #667eea;
    font-size: 1.5rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
    border: 1px solid #e9ecef;
    animation: float 3s ease-in-out infinite;
    transition: all 0.3s ease;
}

.brand-icon:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    border-color: #dee2e6;
    color: #2c3e50;
}

.brand-icon.tv { top: 0; left: 50%; transform: translateX(-50%); animation-delay: 0s; }
.brand-icon.projector { top: 25%; right: 0; animation-delay: 0.5s; }
.brand-icon.monitor { bottom: 30%; right: 0; animation-delay: 1s; }
.brand-icon.tablet { bottom: 20; left: 25%; transform: translateX(-50%); animation-delay: 1.5s; }
.brand-icon.car { bottom: 25%; left: 0; animation-delay: 2s; }
.brand-icon.phone { top: 25%; left: 0; animation-delay: 2.5s; }

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
}

.value-propositions {
    margin-bottom: 80px;
}

.value-propositions h3 {
    font-size: 2.2rem;
    text-align: center;
    color: #2c3e50;
    margin-bottom: 50px;
    font-weight: 600;
}

.value-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.value-item {
    background: white;
    padding: 40px 30px;
    border-radius: 20px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
    text-align: center;
    transition: all 0.4s ease;
    border: 1px solid #e9ecef;
    position: relative;
    overflow: hidden;
}

.value-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #667eea, #764ba2);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.value-item:hover {
    transform: translateY(-6px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
    border-color: #dee2e6;
}

.value-item:hover::before {
    opacity: 1;
}

.value-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 1.8rem;
    color: white;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
    transition: all 0.3s ease;
}

.value-icon:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4);
}

/* 不同value-item的微妙差异 */
.value-item:nth-child(1) .value-icon {
    background: linear-gradient(135deg, #667eea, #764ba2);
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

.value-item:nth-child(1)::before {
    background: linear-gradient(90deg, #667eea, #764ba2);
}

.value-item:nth-child(2) .value-icon {
    background: linear-gradient(135deg, #28a745, #20c997);
    box-shadow: 0 4px 15px rgba(40, 167, 69, 0.3);
}

.value-item:nth-child(2)::before {
    background: linear-gradient(90deg, #28a745, #20c997);
}

.value-item:nth-child(3) .value-icon {
    background: linear-gradient(135deg, #007bff, #6610f2);
    box-shadow: 0 4px 15px rgba(0, 123, 255, 0.3);
}

.value-item:nth-child(3)::before {
    background: linear-gradient(90deg, #007bff, #6610f2);
}

.value-item:nth-child(4) .value-icon {
    background: linear-gradient(135deg, #fd7e14, #e83e8c);
    box-shadow: 0 4px 15px rgba(253, 126, 20, 0.3);
}

.value-item:nth-child(4)::before {
    background: linear-gradient(90deg, #fd7e14, #e83e8c);
}

.value-item h4 {
    font-size: 1.3rem;
    color: #2c3e50;
    margin-bottom: 15px;
    font-weight: 600;
}

.value-item p {
    color: #6c757d;
    line-height: 1.6;
    font-size: 0.95rem;
}

.partnership-options {
    margin-bottom: 80px;
}

.partnership-options h3 {
    font-size: 2.2rem;
    text-align: center;
    color: #2c3e50;
    margin-bottom: 50px;
    font-weight: 600;
}

.options-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}


.option-card {
    background: white;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
    transition: all 0.4s ease;
    border: 1px solid #e9ecef;
    position: relative;
}

.option-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #6c757d, #495057);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.option-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
    border-color: #dee2e6;
}

.option-card:hover::before {
    opacity: 1;
}

.option-card.featured {
    border-color: #667eea;
    transform: scale(1.02);
}

.option-card.featured::before {
    background: linear-gradient(90deg, #667eea, #764ba2);
    opacity: 1;
}

.option-card.featured:hover {
    transform: scale(1.02) translateY(-6px);
}

/* 极简头部设计 */
.option-header {
    background: #f8f9fa;
    color: #2c3e50;
    padding: 2rem;
    position: relative;
    border-bottom: 1px solid #e9ecef;
}

.option-card.featured .option-header {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
    border-bottom-color: rgba(102, 126, 234, 0.2);
}

.option-card:nth-child(2) .option-header {
    background: rgba(40, 167, 69, 0.05);
    border-bottom-color: rgba(40, 167, 69, 0.2);
}

.option-card:nth-child(3) .option-header {
    background: rgba(0, 123, 255, 0.05);
    border-bottom-color: rgba(0, 123, 255, 0.2);
}

.option-header h4 {
    font-size: 1.5rem;
    margin: 0;
    font-weight: 600;
    color: #2c3e50;
}

.option-badge {
    position: absolute;
    top: 15px;
    right: 15px;
    background: #FF6B6B;
    color: white;
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    box-shadow: 0 2px 8px rgba(255, 107, 107, 0.3);
}

.option-content {
    padding: 2rem;
    background: white;
}

.option-content p {
    color: #6c757d;
    line-height: 1.6;
    margin-bottom: 1.5rem;
    font-size: 1rem;
}

.option-features {
    list-style: none;
    padding: 0;
    margin: 0;
}

.option-features li {
    padding: 0.8rem 0;
    color: #495057;
    position: relative;
    padding-left: 2rem;
    border-bottom: 1px solid #f8f9fa;
    transition: all 0.3s ease;
}

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

.option-features li:hover {
    color: #2c3e50;
    padding-left: 2.5rem;
}

.option-features li:before {
    content: '✓';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 16px;
    height: 16px;
    background: #28a745;
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.6rem;
    font-weight: bold;
}

/* 不同卡片的微妙差异 */
.option-card.featured .option-features li:before {
    background: #667eea;
}

.option-card:nth-child(3) .option-features li:before {
    background: #007bff;
}


.partnership-cta {
    background: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
    border-radius: 25px;
    padding: 60px 40px;
    text-align: center;
    color: white;
    position: relative;
    overflow: hidden;
}

.partnership-cta::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
    animation: shimmer 4s ease-in-out infinite;
}

@keyframes shimmer {
    0%, 100% { transform: rotate(0deg); }
    50% { transform: rotate(180deg); }
}

.cta-content {
    position: relative;
    z-index: 1;
}

.partnership-cta h3 {
    font-size: 2.2rem;
    margin-bottom: 20px;
    font-weight: 600;
}

.partnership-cta p {
    font-size: 1.1rem;
    margin-bottom: 40px;
    opacity: 0.9;
    line-height: 1.6;
}

.cta-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

.cta-buttons .btn {
    padding: 15px 30px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 50px;
    text-decoration: none;
    transition: all 0.3s ease;
    border: 2px solid white;
    align-items: center;
    justify-content: center;
}

.cta-buttons .btn-primary {
    background: white;
    color: #FF7043;
}

.cta-buttons .btn-primary:hover {
    background: transparent;
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

.cta-buttons .btn-secondary {
    background: transparent;
    color: white;
}

.cta-buttons .btn-secondary:hover {
    background: white;
    color: #FF7043;
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

/* Solutions Section */
.solutions {
    padding: 100px 0;
    background: white;
}

.solution-showcase {
    max-width: 960px;
    margin: 0 auto;
}

.solution-box {
    background: white;
    padding: 50px 40px;
    border-radius: 20px;
    text-align: center;
    border: 1px solid #e9ecef;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
}

.solution-box::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: #ff7043;
    opacity: 1;
}

.solution-box:hover {
    transform: translateY(-6px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
    border-color: #dee2e6;
}

.solution-box h3 {
    font-size: 2rem;
    font-weight: 700;
    color: #2c3e50;
    margin-bottom: 30px;
}

.solution-components {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
    justify-content: center;
}

.component {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}

.component i {
    font-size: 40px;
    color: #ff7043;
    margin-bottom: 10px;
    transition: all 0.3s ease;
}

.component:hover i {
    color: #2c3e50;
    transform: scale(1.1);
}

.component span {
    font-weight: 600;
    color: #2c3e50;
}

.solution-benefits {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 15px;
    text-align: left;
    max-width: 720px; /* 限制容器最大宽度，确保最多2列 */
    margin: 0 auto; /* 居中显示 */
}

.benefit {
    display: flex;
    align-items: center;
    gap: 15px;
    justify-content: center; 
}

.benefit i {
    color: #28a745;
    font-size: 18px;
}

.benefit span {
    font-weight: 500;
    color: #2c3e50;
}

/* Use Cases Section */
.use-cases {
    padding: 100px 0;
    background: #f8f9fa;
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.case-item {
    background: white;
    padding: 40px 30px;
    border-radius: 20px;
    text-align: center;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
    transition: all 0.4s ease;
    border: 1px solid #e9ecef;
    position: relative;
    overflow: hidden;
}

.case-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #667eea, #764ba2);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.case-item:hover {
    transform: translateY(-6px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
    border-color: #dee2e6;
}

.case-item:hover::before {
    opacity: 1;
}

.case-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
    transition: all 0.3s ease;
}

.case-icon:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4);
}

.case-icon i {
    font-size: 30px;
    color: white;
}

/* 不同case-item的多彩图标 */
.case-item:nth-child(1) .case-icon {
    background: linear-gradient(135deg, #667eea, #764ba2);
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

.case-item:nth-child(1)::before {
    background: linear-gradient(90deg, #667eea, #764ba2);
}

.case-item:nth-child(2) .case-icon {
    background: linear-gradient(135deg, #28a745, #20c997);
    box-shadow: 0 4px 15px rgba(40, 167, 69, 0.3);
}

.case-item:nth-child(2)::before {
    background: linear-gradient(90deg, #28a745, #20c997);
}

.case-item:nth-child(3) .case-icon {
    background: linear-gradient(135deg, #007bff, #6610f2);
    box-shadow: 0 4px 15px rgba(0, 123, 255, 0.3);
}

.case-item:nth-child(3)::before {
    background: linear-gradient(90deg, #007bff, #6610f2);
}

.case-item:nth-child(4) .case-icon {
    background: linear-gradient(135deg, #fd7e14, #e83e8c);
    box-shadow: 0 4px 15px rgba(253, 126, 20, 0.3);
}

.case-item:nth-child(4)::before {
    background: linear-gradient(90deg, #fd7e14, #e83e8c);
}

.case-item:nth-child(5) .case-icon {
    background: linear-gradient(135deg, #dc3545, #6f42c1);
    box-shadow: 0 4px 15px rgba(220, 53, 69, 0.3);
}

.case-item:nth-child(5)::before {
    background: linear-gradient(90deg, #dc3545, #6f42c1);
}

.case-item:nth-child(6) .case-icon {
    background: linear-gradient(135deg, #17a2b8, #28a745);
    box-shadow: 0 4px 15px rgba(23, 162, 184, 0.3);
}

.case-item:nth-child(6)::before {
    background: linear-gradient(90deg, #17a2b8, #28a745);
}

.case-item h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: #2c3e50;
    margin-bottom: 15px;
}

.case-item p {
    color: #6c757d;
    line-height: 1.6;
}

/* About Section */
.about {
    padding: 100px 0;
    background: white;
}

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

.about-highlight {
    margin-bottom: 40px;
}

.about-highlight h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: #2c3e50;
    margin-bottom: 15px;
}

.about-highlight p {
    color: #6c757d;
    line-height: 1.6;
}

.timeline {
    position: relative;
    padding-left: 30px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 15px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: #FF7043;
}

.timeline-item {
    position: relative;
    margin-bottom: 30px;
    padding-left: 40px;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -8px;
    top: 5px;
    width: 16px;
    height: 16px;
    background: #FF7043;
    border-radius: 50%;
    border: 3px solid white;
    box-shadow: 0 0 0 3px #FF7043;
    transition: all 0.3s ease;
}

.timeline-item:hover::before {
    background: #e55a2b;
    box-shadow: 0 0 0 3px #e55a2b;
    transform: scale(1.2);
}

.timeline-year {
    font-size: 1.2rem;
    font-weight: 700;
    color: #FF7043;
    margin-bottom: 5px;
}

.timeline-content {
    color: #6c757d;
    line-height: 1.5;
}

/* Contact Section */
.contact {
    padding: 100px 0;
    background: #f8f9fa;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-bottom: 30px;
}

.contact-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
    transition: all 0.3s ease;
}

.contact-icon:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4);
}

.contact-icon i {
    font-size: 24px;
    color: white;
}

/* 不同联系方式的多彩图标 */
.contact-item:nth-child(1) .contact-icon {
    background: linear-gradient(135deg, #667eea, #764ba2);
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

.contact-item:nth-child(2) .contact-icon {
    background: linear-gradient(135deg, #28a745, #20c997);
    box-shadow: 0 4px 15px rgba(40, 167, 69, 0.3);
}

.contact-item:nth-child(3) .contact-icon {
    background: linear-gradient(135deg, #007bff, #6610f2);
    box-shadow: 0 4px 15px rgba(0, 123, 255, 0.3);
}

.contact-item:nth-child(4) .contact-icon {
    background: linear-gradient(135deg, #fd7e14, #e83e8c);
    box-shadow: 0 4px 15px rgba(253, 126, 20, 0.3);
}

.contact-details h4 {
    font-size: 1.2rem;
    font-weight: 600;
    color: #2c3e50;
    margin-bottom: 5px;
}

.contact-details p {
    color: #6c757d;
}

.contact-form {
    background: white;
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
    border: 1px solid #e9ecef;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.contact-form::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: #ff7043;
    opacity: 1;
}

.contact-form:hover {
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    border-color: #dee2e6;
}

.form-group {
    position: relative;
    margin-bottom: 25px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 15px;
    border: 2px solid #eee;
    border-radius: 8px;
    font-size: 16px;
    transition: all 0.3s ease;
    background: transparent;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-group label {
    position: absolute;
    top: 15px;
    left: 15px;
    color: #999;
    font-size: 16px;
    pointer-events: none;
    transition: all 0.3s ease;
}

.form-group input:focus + label,
.form-group input:valid + label,
.form-group textarea:focus + label,
.form-group textarea:valid + label {
    top: -10px;
    left: 10px;
    font-size: 12px;
    color: #667eea;
    background: white;
    padding: 0 5px;
}

.form-group textarea {
    height: 120px;
    resize: vertical;
}

/* Footer */
.footer {
    background: #1a1a1a;
    color: white;
    padding: 60px 0 20px;
}

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

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 20px;
    filter: brightness(0) invert(1) opacity(0.8);
}

.footer-desc {
    color: #ccc;
    line-height: 1.6;
    max-width: 300px;
}

.footer-section h4 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 20px;
    color: #FF7043;
}

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

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

.footer-links a {
    color: #ccc;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: #FF7043;
}

.footer-bottom {
    border-top: 1px solid #333;
    padding-top: 20px;
    text-align: center;
    color: #999;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: white;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: 20px 0;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .hero-container {
        padding: 2rem 1rem;
    }
    
        .hero-content {
        padding: 60px 30px;
        max-width: 95%;
    }
    
    .hero-title {
        font-size: 3rem;
    }
    
    .hero-title::before {
        top: -8px;
        left: -15px;
        right: -15px;
        bottom: -8px;
        filter: blur(10px);
        background: rgba(255, 255, 255, 0.9);
    }

    .hero-subtitle {
        font-size: 1.2rem;
        margin-bottom: 2.5rem;
        padding: 12px 20px;
    }
    
    .hero-subtitle::before {
        filter: blur(8px);
        background: rgba(255, 255, 255, 0.8);
    }

    .hero-devices {
        width: 300px;
        height: 300px;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
    
    .products-grid {
        grid-template-columns: 1fr;
    }
    
    .solution-components {
        flex-direction: column;
        gap: 20px;
    }
    
    .cases-grid {
        grid-template-columns: 1fr;
    }
    
    .about-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
        text-align: center;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .btn {
        padding: 15px 30px;
        font-size: 16px;
        min-width: 140px;
    }
    
    .hero-buttons {
        gap: 15px;
        flex-direction: column;
        align-items: center;
    }
    
    /* Brand Partnership Responsive */
    .brand-partnership {
        padding: 60px 0;
    }
    
    .partnership-hero {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }
    
    .partnership-text h3 {
        font-size: 2rem;
    }
    
    .partnership-text p {
        font-size: 1rem;
    }
    
    .partnership-stats {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .brand-ecosystem {
        width: 300px;
        height: 300px;
    }
    
    .brand-icon {
        width: 45px;
        height: 45px;
        font-size: 1.2rem;
    }
    
    .center-logo {
        width: 80px;
        height: 80px;
    }
    
    .ecosystem-logo {
        width: 45px;
        height: 45px;
    }
    
    .value-propositions h3,
    .partnership-options h3 {
        font-size: 1.8rem;
    }
    
    .value-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .value-item {
        padding: 30px 20px;
    }
    
    .options-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .option-card.featured {
        transform: none;
    }
    
    .option-card.featured:hover {
        transform: translateY(-5px);
    }
    
    .partnership-cta {
        padding: 40px 20px;
        margin: 0 10px;
    }
    
    .partnership-cta h3 {
        font-size: 1.8rem;
    }
    
    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .cta-buttons .btn {
        width: 100%;
        max-width: 280px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .stat-number {
        font-size: 2.5rem;
    }
    
    .hero-devices {
        width: 250px;
        height: 250px;
    }
    
    .device {
        width: 60px;
        height: 60px;
    }
    
    .device i {
        font-size: 24px;
    }
}

/* Smooth scrolling and animations */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Loading animation */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 112, 67, 0.3);
    border-radius: 50%;
    border-top-color: #FF7043;
    animation: spin 1s ease-in-out infinite;
}

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