/* 重置默认样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* 全局样式 */
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f9fa;
}

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

/* 头部样式 */
.header {
    background: linear-gradient(135deg, #1e3c72, #2a5298, #3a5f9e);
    color: white;
    padding: 1rem 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo h1 {
    font-size: 1.8rem;
    font-weight: 700;
    letter-spacing: 1px;
    background: linear-gradient(to right, #ffffff, #d1e7ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.nav .lang-selector {
    display: flex;
    gap: 10px;
    background: rgba(255, 255, 255, 0.1);
    padding: 5px;
    border-radius: 35px;
    backdrop-filter: blur(10px);
}

.lang-btn {
    background: rgba(255, 255, 255, 0.15);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.3);
    padding: 10px 20px;
    border-radius: 30px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.95rem;
    font-weight: 500;
    backdrop-filter: blur(5px);
    margin: 0 4px;
}

.lang-btn:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: translateY(-2px);
    border-color: rgba(255, 255, 255, 0.5);
}

.lang-btn.active {
    background: rgba(255, 255, 255, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.6);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
    font-weight: 600;
}

/* 主视觉区域样式 */
.hero {
    background: linear-gradient(135deg, #1e3c72, #2a5298, #3a5f9e);
    color: white;
    padding: 120px 0 80px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at center, transparent 0%, rgba(0, 0, 0, 0.1) 100%);
    pointer-events: none;
}

/* 添加动画背景元素 */
.hero::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 30%, rgba(255, 255, 255, 0.1) 0%, transparent 40%),
        radial-gradient(circle at 80% 70%, rgba(255, 255, 255, 0.1) 0%, transparent 40%);
    animation: float 8s infinite alternate;
    pointer-events: none;
    z-index: 0;
}

/* 添加漂浮粒子效果 */
.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(circle at 10% 20%, rgba(255, 255, 255, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 90% 80%, rgba(255, 255, 255, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 50% 50%, rgba(255, 255, 255, 0.03) 0%, transparent 30%);
    animation: particles-float 15s infinite linear;
    pointer-events: none;
    z-index: 1;
}

@keyframes float {
    0% {
        transform: translate(0, 0) rotate(0deg);
    }
    25% {
        transform: translate(5px, 10px) rotate(2deg);
    }
    50% {
        transform: translate(0, 15px) rotate(0deg);
    }
    75% {
        transform: translate(-5px, 10px) rotate(-2deg);
    }
    100% {
        transform: translate(0, 0) rotate(0deg);
    }
}

@keyframes particles-float {
    0% {
        background-position: 0% 0%, 100% 100%, 50% 50%;
    }
    100% {
        background-position: 100% 0%, 0% 100%, 100% 100%;
    }
}

.hero-title {
    font-size: 3rem;
    margin-bottom: 1.5rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 2px;
    text-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
    position: relative;
    display: inline-block;
}

.hero-title::after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 4px;
    background: linear-gradient(to right, transparent, #fff, transparent);
    border-radius: 2px;
}

.hero-subtitle {
    font-size: 1.3rem;
    margin-bottom: 2.5rem;
    opacity: 0.9;
    font-weight: 300;
    letter-spacing: 1px;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.6;
}

.hero-services {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
    margin-top: 2.5rem;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
    100% {
        transform: scale(1);
    }
}

.service-item h3 {
    font-size: 1.4rem;
    display: flex;
    align-items: center;
    gap: 0.8rem;
    font-weight: 600;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
    background: rgba(255, 255, 255, 0.1);
    padding: 12px 25px;
    border-radius: 30px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: all 0.3s ease;
}

.service-item h3:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

/* 服务展示区样式 */
.services-section {
    padding: 100px 0;
    background-color: white;
    position: relative;
}

.services-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 10px;
    background: linear-gradient(90deg, #1e3c72, #2a5298, #3a5f9e);
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 4rem;
    color: #1e3c72;
    position: relative;
    display: inline-block;
    left: 50%;
    transform: translateX(-50%);
}

.section-title::after {
    content: '';
    display: block;
    width: 100px;
    height: 5px;
    background: linear-gradient(to right, #1e3c72, #2a5298);
    margin: 15px auto;
    border-radius: 3px;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 40px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.service-card {
    background: white;
    border-radius: 16px;
    padding: 40px 30px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    border: 1px solid rgba(30, 60, 114, 0.1);
    position: relative;
    overflow: hidden;
    animation: slideUp 0.6s ease-out;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(to right, #1e3c72, #2a5298);
}

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

.service-card:hover {
    transform: translateY(-15px) scale(1.03);
    box-shadow: 0 20px 40px rgba(30, 60, 114, 0.2);
    border-color: rgba(30, 60, 114, 0.2);
}

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

.service-name {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: #1e3c72;
    font-weight: 600;
}

.service-desc {
    color: #666;
    font-size: 1rem;
    line-height: 1.6;
}

/* 联系方式区样式 */
.contact-section {
    padding: 100px 0;
    background: linear-gradient(135deg, #f0f4f8, #e2e8f0, #d1e0f0);
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 40px;
    text-align: center;
}

.contact-item {
    background: linear-gradient(135deg, #ffffff, #f8fafd);
    padding: 50px 40px;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    max-width: 500px;
    margin: 0 auto;
    border: 1px solid rgba(30, 60, 114, 0.1);
    position: relative;
    overflow: hidden;
}

.contact-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(to right, #1e3c72, #2a5298);
}

.contact-item:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: 0 20px 40px rgba(30, 60, 114, 0.15);
}

.contact-item h3 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    color: #1e3c72;
    font-weight: 700;
    letter-spacing: 0.5px;
}

.contact-item p {
    font-size: 1.4rem;
    color: #2d3748;
    font-weight: 600;
    letter-spacing: 1px;
    word-spacing: 3px;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
}

/* 页脚样式 */
.footer {
    background: #1e3c72;
    color: white;
    text-align: center;
    padding: 2rem 0;
}

.footer p {
    font-size: 0.9rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        padding: 0 15px;
    }

    .header .container {
        flex-direction: column;
        gap: 10px;
    }

    .logo h1 {
        font-size: 1.3rem;
    }

    .hero {
        padding: 100px 0 60px;
    }

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

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

    .hero-services {
        flex-direction: column;
        align-items: center;
        gap: 1rem;
    }

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

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

    .service-card {
        padding: 20px;
    }

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

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.8rem;
    }

    .hero-subtitle {
        font-size: 0.9rem;
    }

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

    .service-name {
        font-size: 1.2rem;
    }

    .contact-item {
        padding: 20px;
    }
}

/* 按钮悬停效果 */
.btn {
    display: inline-block;
    padding: 12px 28px;
    background: linear-gradient(to right, #1e3c72, #2a5298);
    color: white;
    text-decoration: none;
    border-radius: 4px;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(30, 60, 114, 0.3);
}

/* 文字高亮 */
.highlight {
    color: #2a5298;
    font-weight: bold;
}

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

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