/* 基础样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', Arial, sans-serif;
    line-height: 1.6;
    color: #1a1a1a;
    background-color: #fafbfc;
    overflow-x: hidden;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 24px;
}

/* 导航栏样式 */
.navbar {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
    padding: 1rem 0;
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

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

.logo-link {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    transition: transform 0.3s ease;
}

.logo-link:hover {
    transform: scale(1.05);
}

.logo-img {
    height: 60px;
    width: auto;
    object-fit: contain;
}

.nav-logo h2 {
    color: #1a1a1a;
    font-size: 1.75rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 8px;
    margin: 0;
}

.nav-logo i {
    color: #6366f1;
    font-size: 1.5rem;
}

.logo-text {
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-size: 1.75rem;
    font-weight: 700;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 40px;
}

.nav-link {
    color: #374151;
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: all 0.3s ease;
    position: relative;
    padding: 8px 0;
}

.nav-link:hover {
    color: #6366f1;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    transition: width 0.3s ease;
    border-radius: 1px;
}

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

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

.language-toggle {
    display: flex;
    background: #f1f5f9;
    border-radius: 50px;
    padding: 4px;
    gap: 4px;
}

.lang-btn {
    padding: 8px 16px;
    border: none;
    background: transparent;
    color: #64748b;
    font-weight: 500;
    font-size: 0.875rem;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.lang-btn.active {
    background: white;
    color: #6366f1;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

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

.bar {
    width: 24px;
    height: 2px;
    background-color: #374151;
    transition: 0.3s;
    border-radius: 2px;
}

/* 主页横幅 */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    position: relative;
    color: white;
    padding: 140px 0 100px;
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-bg-animation {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0.1;
    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="white" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)" /></svg>');
    animation: float 20s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(2deg); }
}

.hero-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 24px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
    position: relative;
    z-index: 2;
}

.hero-badge {
    display: inline-block;
    background: rgba(255, 255, 255, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    padding: 8px 20px;
    border-radius: 50px;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 24px;
    animation: fadeInUp 0.8s ease-out;
}

.hero-title {
    font-size: 3.75rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 24px;
    animation: fadeInUp 0.8s ease-out 0.2s both;
}

.hero-subtitle {
    font-size: 1.25rem;
    line-height: 1.6;
    opacity: 0.9;
    margin-bottom: 40px;
    animation: fadeInUp 0.8s ease-out 0.4s both;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    margin-bottom: 60px;
    animation: fadeInUp 0.8s ease-out 0.6s both;
}

.btn {
    padding: 16px 32px;
    border: none;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: inline-flex;
    align-items: center;
    gap: 8px;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background: white;
    color: #6366f1;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.2);
}

.btn-secondary {
    background: transparent;
    color: white;
    border: 2px solid rgba(255, 255, 255, 0.5);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: white;
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.hero-stats {
    display: flex;
    gap: 40px;
    animation: fadeInUp 0.8s ease-out 0.8s both;
}

.stat {
    text-align: center;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 8px;
    color: white;
}

.stat-label {
    font-size: 0.875rem;
    opacity: 0.8;
    font-weight: 500;
}

.hero-visual {
    position: relative;
    height: 500px;
    animation: fadeInRight 1s ease-out 0.5s both;
}

.floating-cards {
    position: relative;
    width: 100%;
    height: 100%;
}

.floating-card {
    position: absolute;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 20px;
    padding: 24px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    text-align: center;
    transition: all 0.3s ease;
    cursor: pointer;
}

.floating-card:hover {
    transform: translateY(-10px);
    background: rgba(255, 255, 255, 0.2);
}

.floating-card i {
    font-size: 2rem;
    color: white;
}

.floating-card span {
    font-size: 0.875rem;
    font-weight: 500;
    color: white;
}

.card-1 {
    top: 5%;
    left: 5%;
    animation: float 6s ease-in-out infinite;
}

.card-2 {
    top: 15%;
    right: 15%;
    animation: float 6s ease-in-out infinite 1s;
}

.card-3 {
    top: 50%;
    left: 0%;
    transform: translateY(-50%);
    animation: float 6s ease-in-out infinite 2s;
}

.card-4 {
    top: 50%;
    right: 0%;
    transform: translateY(-50%);
    animation: float 6s ease-in-out infinite 3s;
}

.card-5 {
    bottom: 15%;
    left: 15%;
    animation: float 6s ease-in-out infinite 4s;
}

.card-6 {
    bottom: 5%;
    right: 5%;
    animation: float 6s ease-in-out infinite 5s;
}

/* 章节样式 */
.section-header {
    text-align: center;
    margin-bottom: 80px;
}

.section-title {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 20px;
    color: #1a1a1a;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -12px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    border-radius: 2px;
}

.section-subtitle {
    font-size: 1.25rem;
    color: #6b7280;
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.6;
}

/* 服务介绍 */
.services {
    padding: 120px 0;
    background: white;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
    gap: 40px;
}

.service-card {
    background: white;
    padding: 40px;
    border-radius: 24px;
    border: 1px solid #f1f5f9;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: -1;
}

.service-card:hover {
    transform: translateY(-12px);
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.15);
}

.service-card:hover::before {
    opacity: 0.05;
}

.service-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    box-shadow: 0 10px 25px rgba(99, 102, 241, 0.3);
}

.service-icon i {
    font-size: 2rem;
    color: white;
}

.service-card h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 16px;
    color: #1a1a1a;
}

.service-card p {
    color: #6b7280;
    margin-bottom: 24px;
    line-height: 1.6;
    font-size: 1rem;
}

.service-features {
    list-style: none;
}

.service-features li {
    padding: 10px 0;
    color: #374151;
    position: relative;
    padding-left: 32px;
    font-weight: 500;
}

.service-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: #6366f1;
    font-weight: bold;
    font-size: 1.1rem;
}

/* 核心功能特色 */
.features {
    padding: 120px 0;
    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
}

/* 案例展示 */
.portfolio {
    padding: 120px 0;
    background: white;
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 40px;
    margin-top: 60px;
}

.portfolio-card {
    background: white;
    border-radius: 24px;
    border: 1px solid #f1f5f9;
    overflow: hidden;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}

.portfolio-card:hover {
    transform: translateY(-12px);
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.15);
    border-color: #e0e7ff;
}

.portfolio-image {
    position: relative;
    width: 100%;
    height: 280px;
    overflow: hidden;
    background: linear-gradient(135deg, #f8fafc 0%, #e0e7ff 100%);
    display: flex;
    align-items: center;
    justify-content: center;
}

.portfolio-logo {
    width: 100%;
    height: 100%;
    object-fit: contain;
    padding: 40px;
    background: white;
    transition: transform 0.3s ease;
}

.portfolio-card:hover .portfolio-logo {
    transform: scale(1.05);
}

.portfolio-image-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    color: white;
    font-size: 4rem;
    opacity: 0.9;
}

.portfolio-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: transparent;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.portfolio-card:hover .portfolio-overlay {
    opacity: 1;
}

.portfolio-link {
    color: #1a1a1a;
    text-decoration: none;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    font-weight: 600;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    background: rgba(255, 255, 255, 0.95);
    padding: 16px 24px;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.portfolio-link:hover {
    transform: scale(1.05);
    background: white;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2);
}

.portfolio-link i {
    font-size: 2rem;
    color: #6366f1;
}

.portfolio-content {
    padding: 32px;
}

.portfolio-content h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: #1a1a1a;
}

.portfolio-category {
    color: #6366f1;
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 16px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.portfolio-description {
    color: #6b7280;
    line-height: 1.7;
    margin-bottom: 24px;
    font-size: 0.95rem;
}

.portfolio-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 24px;
}

.tech-tag {
    padding: 6px 14px;
    background: #f1f5f9;
    border-radius: 20px;
    font-size: 0.85rem;
    color: #374151;
    font-weight: 500;
    transition: all 0.3s ease;
}

.tech-tag:hover {
    background: #e0e7ff;
    color: #6366f1;
}

.portfolio-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    color: white;
    text-decoration: none;
    border-radius: 12px;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.portfolio-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.4);
}

.portfolio-btn i {
    transition: transform 0.3s ease;
}

.portfolio-btn:hover i {
    transform: translateX(4px);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 40px;
}

.feature-item {
    text-align: center;
    padding: 40px 32px;
    background: white;
    border-radius: 24px;
    border: 1px solid #f1f5f9;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.feature-item::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(45deg, transparent, rgba(99, 102, 241, 0.05), transparent);
    transform: rotate(45deg);
    transition: transform 0.6s ease;
}

.feature-item:hover::before {
    transform: rotate(45deg) translate(50%, 50%);
}

.feature-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.feature-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
    box-shadow: 0 10px 25px rgba(99, 102, 241, 0.3);
}

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

.feature-item h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 16px;
    color: #1a1a1a;
}

.feature-item p {
    color: #6b7280;
    line-height: 1.6;
}

/* 配送路径规划特色展示 */
.delivery-section {
    padding: 120px 0;
    background: white;
    position: relative;
    overflow: hidden;
}

.delivery-section::before {
    content: '';
    position: absolute;
    top: 0;
    right: -50%;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.05) 0%, rgba(139, 92, 246, 0.05) 100%);
    border-radius: 50%;
    z-index: 1;
}

.delivery-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 80px;
    align-items: center;
    position: relative;
    z-index: 2;
}

.delivery-text h3 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 24px;
    color: #1a1a1a;
}

.delivery-text > p {
    font-size: 1.25rem;
    color: #6b7280;
    margin-bottom: 48px;
    line-height: 1.6;
}

.delivery-features {
    display: grid;
    gap: 32px;
}

.delivery-feature {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    padding: 24px;
    background: #fafbfc;
    border-radius: 16px;
    border: 1px solid #f1f5f9;
    transition: all 0.3s ease;
}

.delivery-feature:hover {
    background: white;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.08);
    transform: translateX(8px);
}

.delivery-feature i {
    font-size: 2rem;
    color: #6366f1;
    margin-top: 4px;
    min-width: 40px;
}

.delivery-feature h4 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: #1a1a1a;
}

.delivery-feature p {
    color: #6b7280;
    line-height: 1.5;
}

.delivery-stats {
    display: grid;
    gap: 32px;
}

.stat-item {
    text-align: center;
    padding: 40px;
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    border-radius: 24px;
    color: white;
    position: relative;
    overflow: hidden;
}

.stat-item::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transform: rotate(45deg);
    animation: shimmer 3s ease-in-out infinite;
}

@keyframes shimmer {
    0% { transform: rotate(45deg) translate(-100%, -100%); }
    50% { transform: rotate(45deg) translate(100%, 100%); }
    100% { transform: rotate(45deg) translate(100%, 100%); }
}

.stat-item .stat-number {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 12px;
    position: relative;
    z-index: 2;
}

.stat-item .stat-label {
    font-size: 1rem;
    opacity: 0.9;
    font-weight: 500;
    position: relative;
    z-index: 2;
}

/* 联系我们 */
.contact {
    padding: 120px 0;
    background: linear-gradient(135deg, #1e293b 0%, #334155 100%);
    color: white;
    position: relative;
    overflow: hidden;
}

.contact::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="dots" width="20" height="20" patternUnits="userSpaceOnUse"><circle cx="10" cy="10" r="1" fill="rgba(255,255,255,0.1)"/></pattern></defs><rect width="100" height="100" fill="url(%23dots)" /></svg>');
    z-index: 1;
}

.contact .container {
    position: relative;
    z-index: 2;
}

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

.contact .section-title::after {
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
}

.contact .section-subtitle {
    color: rgba(255, 255, 255, 0.8);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    margin-top: 80px;
}

.contact-info h3 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 24px;
}

.contact-info > p {
    font-size: 1.125rem;
    margin-bottom: 48px;
    opacity: 0.9;
    line-height: 1.6;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 24px;
    margin-bottom: 32px;
    padding: 20px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 16px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
}

.contact-item:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateX(8px);
}

.contact-item i {
    font-size: 1.5rem;
    color: #6366f1;
    width: 24px;
    text-align: center;
}

.contact-item h4 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.contact-item p {
    opacity: 0.9;
    font-size: 1rem;
}

.contact-form {
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 48px;
    border-radius: 24px;
}

.contact-form h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 32px;
    text-align: center;
}

.form-group {
    margin-bottom: 24px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 16px 20px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 12px;
    font-size: 1rem;
    background: rgba(255, 255, 255, 0.1);
    color: white;
    transition: all 0.3s ease;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: rgba(255, 255, 255, 0.6);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    background: rgba(255, 255, 255, 0.15);
    border-color: #6366f1;
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

.contact-form .btn {
    width: 100%;
    margin-top: 16px;
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    color: white;
    border: none;
}

.contact-form .btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 15px 35px rgba(99, 102, 241, 0.4);
}

/* 页脚 */
.footer {
    background: #0f172a;
    color: white;
    padding: 80px 0 32px;
    position: relative;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 48px;
    margin-bottom: 48px;
}

.footer-section h3,
.footer-section h4 {
    margin-bottom: 24px;
    color: white;
    display: flex;
    align-items: center;
    gap: 12px;
}

.footer-section h3 {
    font-size: 1.5rem;
    font-weight: 700;
}

.footer-logo-img {
    height: 48px;
    width: auto;
    object-fit: contain;
}

.footer-section h4 {
    font-size: 1.125rem;
    font-weight: 600;
}

.footer-section p {
    line-height: 1.6;
    opacity: 0.8;
    font-size: 1rem;
}

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

.footer-section ul li {
    padding: 8px 0;
    opacity: 0.8;
    transition: opacity 0.3s ease;
}

.footer-section ul li:hover {
    opacity: 1;
}

.footer-section ul li a {
    color: white;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section ul li a:hover {
    color: #6366f1;
}

.footer-section ul li i {
    margin-right: 12px;
    color: #6366f1;
    width: 16px;
}

.social-links {
    display: flex;
    gap: 16px;
}

.social-links a {
    width: 48px;
    height: 48px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.25rem;
    transition: all 0.3s ease;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.social-links a:hover {
    background: #6366f1;
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(99, 102, 241, 0.3);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 32px;
    text-align: center;
    opacity: 0.7;
}

/* 动画 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(40px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.animate-fadeInUp {
    animation: fadeInUp 0.8s cubic-bezier(0.4, 0, 0.2, 1) both;
}

/* 响应式设计 */
@media screen and (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        gap: 60px;
        text-align: center;
    }
    
    .hero-title {
        font-size: 3rem;
    }
    
    .delivery-content {
        grid-template-columns: 1fr;
        gap: 60px;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
        gap: 60px;
    }
}

@media screen and (max-width: 768px) {
    .hamburger {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 80px;
        flex-direction: column;
        background: rgba(255, 255, 255, 0.95);
        backdrop-filter: blur(20px);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        padding: 40px 0;
        gap: 20px;
        border-top: 1px solid rgba(0, 0, 0, 0.1);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-actions {
        gap: 16px;
    }
    
    .language-toggle {
        order: -1;
    }
    
    .hero {
        padding: 120px 0 80px;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.125rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .hero-stats {
        justify-content: center;
        gap: 32px;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .section-title {
        font-size: 2.5rem;
    }
    
    .contact-form {
        padding: 32px 24px;
    }
}

@media screen and (max-width: 480px) {
    .container {
        padding: 0 16px;
    }
    
    .nav-container {
        padding: 0 16px;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 24px;
    }
    
    .services {
        padding: 80px 0;
    }
    
    .features {
        padding: 80px 0;
    }
    
    .delivery-section {
        padding: 80px 0;
    }
    
    .contact {
        padding: 80px 0;
    }
    
    .service-card,
    .feature-item {
        padding: 32px 24px;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .delivery-text h3 {
        font-size: 2rem;
    }
    
    .portfolio {
        padding: 80px 0;
    }
    
    .portfolio-grid {
        grid-template-columns: 1fr;
        gap: 32px;
        margin-top: 40px;
    }
    
    .portfolio-image {
        height: 240px;
    }
    
    .portfolio-image-placeholder {
        font-size: 3rem;
    }
    
    .portfolio-content {
        padding: 24px;
    }
    
    .portfolio-content h3 {
        font-size: 1.3rem;
    }
}

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

/* 自定义滚动条 */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f5f9;
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
}