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

body {
    font-family: 'Arial', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: #333;
    overflow-x: hidden;
}

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

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px 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 h2 {
    color: #0ea5e9;
    font-size: 1.8rem;
    font-weight: bold;
}

.nav-menu {
    display: flex;
    list-style: none;
    align-items: center;
    gap: 2rem;
}

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

.nav-link:hover {
    color: #0ea5e9;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: #0ea5e9;
    transition: width 0.3s ease;
}

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

.lang-toggle {
    background: #0ea5e9;
    color: white;
    border: none;
    padding: 8px 16px;
    border-radius: 20px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 5px;
    transition: all 0.3s ease;
}

.lang-toggle:hover {
    background: #0284c7;
    transform: translateY(-2px);
}

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

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

/* 英雄区域 */
.hero {
    min-height: 100vh;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 25% 25%, rgba(59, 130, 246, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 75% 75%, rgba(16, 185, 129, 0.1) 0%, transparent 50%);
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 4rem;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-content {
    color: white;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: bold;
    margin-bottom: 1rem;
    line-height: 1.2;
    animation: fadeInUp 1s ease;
}

.hero-subtitle {
    font-size: 1.8rem;
    color: #e0f2fe;
    margin-bottom: 1.5rem;
    animation: fadeInUp 1s ease 0.2s both;
}

.hero-description {
    font-size: 1.2rem;
    color: #bae6fd;
    margin-bottom: 2rem;
    max-width: 600px;
    animation: fadeInUp 1s ease 0.4s both;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    animation: fadeInUp 1s ease 0.6s both;
}

.btn {
    padding: 12px 30px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    display: inline-block;
    border: none;
    cursor: pointer;
}

.btn-primary {
    background: #0ea5e9;
    color: white;
}

.btn-primary:hover {
    background: #0284c7;
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(14, 165, 233, 0.3);
}

.btn-secondary {
    background: transparent;
    color: white;
    border: 2px solid white;
}

.btn-secondary:hover {
    background: white;
    color: #0ea5e9;
    transform: translateY(-2px);
}

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

.tech-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    transform: rotate(3deg);
    transition: transform 0.3s ease;
}

.tech-grid:hover {
    transform: rotate(0deg);
}

.tech-item {
    width: 80px;
    height: 80px;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: white;
    animation: float 6s ease-in-out infinite;
}

.tech-item:nth-child(2) {
    animation-delay: 2s;
}

.tech-item:nth-child(3) {
    animation-delay: 4s;
}

.tech-item:nth-child(4) {
    animation-delay: 1s;
}

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

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-title {
    font-size: 2.5rem;
    font-weight: bold;
    color: #1f2937;
    margin-bottom: 1rem;
}

.section-subtitle {
    font-size: 1.2rem;
    color: #6b7280;
    max-width: 600px;
    margin: 0 auto;
}

/* 关于我们 */
.about {
    background: #f8fafc;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: start;
}

.about-text p {
    font-size: 1.1rem;
    color: #4b5563;
    margin-bottom: 2rem;
    line-height: 1.8;
}

.company-info {
    display: grid;
    gap: 1.5rem;
}

.info-item h3 {
    color: #1f2937;
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

.info-item p {
    color: #6b7280;
    margin-bottom: 0.3rem;
}

.about-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.feature-card {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    text-align: center;
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 25px rgba(0, 0, 0, 0.1);
}

.feature-card i {
    font-size: 2.5rem;
    color: #0ea5e9;
    margin-bottom: 1rem;
}

.feature-card h3 {
    color: #1f2937;
    margin-bottom: 0.5rem;
}

.feature-card p {
    color: #6b7280;
    font-size: 0.9rem;
}

/* 服务项目 */
.services {
    background: white;
}

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

.service-card {
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    padding: 2.5rem;
    border-radius: 20px;
    text-align: center;
    transition: all 0.3s ease;
    border: 1px solid rgba(14, 165, 233, 0.1);
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 25px 50px rgba(14, 165, 233, 0.15);
}

.service-card:nth-child(even) {
    background: linear-gradient(135deg, #f0fdf4 0%, #dcfce7 100%);
    border-color: rgba(34, 197, 94, 0.1);
}

.service-card:nth-child(even):hover {
    box-shadow: 0 25px 50px rgba(34, 197, 94, 0.15);
}

.service-icon {
    width: 80px;
    height: 80px;
    background: #0ea5e9;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    font-size: 2rem;
    color: white;
}

.service-card:nth-child(even) .service-icon {
    background: #22c55e;
}

.service-card h3 {
    color: #1f2937;
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.service-card p {
    color: #4b5563;
    line-height: 1.6;
}

/* 联系我们 */
.contact {
    background: #1f2937;
    color: white;
}

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

.contact .section-subtitle {
    color: #9ca3af;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
}

.contact-item i {
    font-size: 1.5rem;
    color: #0ea5e9;
    margin-top: 0.2rem;
}

.contact-item h3 {
    color: #f9fafb;
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

.contact-item p {
    color: #d1d5db;
    margin: 0;
}

.contact-form {
    background: rgba(255, 255, 255, 0.05);
    padding: 2rem;
    border-radius: 15px;
    backdrop-filter: blur(10px);
}

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

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.1);
    color: white;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: #9ca3af;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #0ea5e9;
    background: rgba(255, 255, 255, 0.15);
}

/* 页脚 */
.footer {
    background: #111827;
    color: white;
    padding: 3rem 0 1rem;
}

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

.footer-section h3,
.footer-section h4 {
    color: #0ea5e9;
    margin-bottom: 1rem;
}

.footer-section p {
    color: #9ca3af;
    line-height: 1.6;
}

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

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section ul li a {
    color: #d1d5db;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section ul li a:hover {
    color: #0ea5e9;
}

.footer-bottom {
    border-top: 1px solid #374151;
    padding-top: 1rem;
    text-align: center;
    color: #9ca3af;
}

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

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

/* 法律页面样式 */
.legal-page {
    padding-top: 70px;
}

.page-header {
    background: linear-gradient(135deg, #1f2937 0%, #374151 100%);
    color: white;
    padding: 4rem 0;
    text-align: center;
}

.header-content {
    max-width: 800px;
    margin: 0 auto;
}

.header-icon {
    font-size: 4rem;
    color: #0ea5e9;
    margin-bottom: 1rem;
}

.page-header h1 {
    font-size: 3rem;
    font-weight: bold;
    margin-bottom: 1rem;
}

.last-updated {
    font-size: 1.1rem;
    color: #9ca3af;
}

.legal-content {
    padding: 4rem 0;
    background: #f8fafc;
}

.content-wrapper {
    max-width: 800px;
    margin: 0 auto;
}

.content-section {
    background: white;
    margin-bottom: 2rem;
    border-radius: 15px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    overflow: hidden;
    transition: all 0.3s ease;
}

.content-section:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.content-section .section-icon {
    background: linear-gradient(135deg, #0ea5e9 0%, #0284c7 100%);
    color: white;
    padding: 1.5rem;
    font-size: 1.5rem;
    text-align: center;
}

.content-section h2 {
    padding: 1.5rem 2rem 0;
    color: #1f2937;
    font-size: 1.5rem;
    font-weight: bold;
    margin-bottom: 1rem;
}

.content-text {
    padding: 0 2rem 2rem;
}

.content-text p {
    color: #4b5563;
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

.info-box {
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    border: 1px solid rgba(14, 165, 233, 0.2);
    border-radius: 10px;
    padding: 1.5rem;
    margin: 1.5rem 0;
}

.info-box-blue {
    background: linear-gradient(135deg, #dbeafe 0%, #bfdbfe 100%);
    border-color: rgba(59, 130, 246, 0.2);
}

.info-box-orange {
    background: linear-gradient(135deg, #fed7aa 0%, #fdba74 100%);
    border-color: rgba(249, 115, 22, 0.2);
}

.info-box-purple {
    background: linear-gradient(135deg, #e9d5ff 0%, #d8b4fe 100%);
    border-color: rgba(147, 51, 234, 0.2);
}

.info-box h3 {
    color: #1f2937;
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.info-box ul {
    list-style: none;
    padding: 0;
}

.info-box ul li {
    position: relative;
    padding-left: 1.5rem;
    margin-bottom: 0.5rem;
    color: #4b5563;
    line-height: 1.6;
}

.info-box ul li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: #10b981;
    font-weight: bold;
}

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

.contact-card {
    background: #f8fafc;
    padding: 1rem;
    border-radius: 8px;
    border: 1px solid #e5e7eb;
    text-align: center;
}

.contact-card h3 {
    color: #0ea5e9;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.contact-card p {
    color: #4b5563;
    font-size: 0.9rem;
    margin: 0;
    word-break: break-all;
}

.nav-link.active {
    color: #0ea5e9;
    font-weight: 600;
}

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

/* 响应式设计 */
@media (max-width: 768px) {
    .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: 2rem 0;
    }

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

    .nav-toggle {
        display: flex;
    }

    .nav-toggle.active .bar:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.active .bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }

    .nav-toggle.active .bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }

    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.4rem;
    }

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

    .about-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

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

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

    .footer-content {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
    }

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

    .tech-grid {
        transform: none;
    }

    /* 法律页面移动端样式 */
    .page-header h1 {
        font-size: 2rem;
    }

    .header-icon {
        font-size: 3rem;
    }

    .content-section h2 {
        padding: 1rem 1.5rem 0;
        font-size: 1.3rem;
    }

    .content-text {
        padding: 0 1.5rem 1.5rem;
    }

    .info-box {
        padding: 1rem;
        margin: 1rem 0;
    }

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

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

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

    .hero-subtitle {
        font-size: 1.2rem;
    }

    .btn {
        padding: 10px 25px;
        font-size: 0.9rem;
    }

    .service-card,
    .feature-card {
        padding: 1.5rem;
    }

    .tech-item {
        width: 60px;
        height: 60px;
        font-size: 1.5rem;
    }
}