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

:root {
    --primary-blue: #2563eb;
    --dark-blue: #1e40af;
    --light-blue: #3b82f6;
    --lighter-blue: #dbeafe;
    --white: #ffffff;
    --gray: #6b7280;
    --light-gray: #f3f4f6;
    --dark-gray: #1f2937;
}

html {
    scroll-behavior: smooth;
}

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

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

/* 粒子背景 */
.particles {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
}

.particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: radial-gradient(circle, var(--light-blue), transparent);
    border-radius: 50%;
    animation: float 20s infinite ease-in-out;
    opacity: 0.6;
}

.particle:nth-child(1) { left: 10%; animation-delay: 0s; animation-duration: 15s; }
.particle:nth-child(2) { left: 20%; animation-delay: 2s; animation-duration: 18s; }
.particle:nth-child(3) { left: 30%; animation-delay: 4s; animation-duration: 22s; }
.particle:nth-child(4) { left: 40%; animation-delay: 1s; animation-duration: 20s; }
.particle:nth-child(5) { left: 50%; animation-delay: 3s; animation-duration: 17s; }
.particle:nth-child(6) { left: 60%; animation-delay: 5s; animation-duration: 19s; }
.particle:nth-child(7) { left: 70%; animation-delay: 2.5s; animation-duration: 21s; }
.particle:nth-child(8) { left: 80%; animation-delay: 4.5s; animation-duration: 16s; }
.particle:nth-child(9) { left: 90%; animation-delay: 1.5s; animation-duration: 23s; }
.particle:nth-child(10) { left: 95%; animation-delay: 3.5s; animation-duration: 18s; }

@keyframes float {
    0%, 100% {
        transform: translateY(100vh) scale(0);
        opacity: 0;
    }
    50% {
        opacity: 0.8;
        transform: translateY(-10vh) scale(1.5);
    }
}

/* 导航栏 */
.header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(37, 99, 235, 0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    transition: all 0.3s ease;
}

.header.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 4px 30px rgba(37, 99, 235, 0.15);
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 20px;
}

.logo {
    font-size: 1.8rem;
    font-weight: bold;
    background: linear-gradient(135deg, var(--primary-blue), var(--light-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 0 30px rgba(37, 99, 235, 0.3);
    animation: glow 2s ease-in-out infinite alternate;
}

@keyframes glow {
    from {
        filter: drop-shadow(0 0 5px rgba(37, 99, 235, 0.5));
    }
    to {
        filter: drop-shadow(0 0 15px rgba(37, 99, 235, 0.8));
    }
}

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

.nav-menu a {
    text-decoration: none;
    color: var(--dark-gray);
    font-weight: 500;
    position: relative;
    transition: color 0.3s;
    padding: 5px 0;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-blue), var(--light-blue));
    transition: width 0.3s ease;
}

.nav-menu a:hover {
    color: var(--primary-blue);
}

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

/* 主横幅 */
.hero {
    background: linear-gradient(135deg, #1e3a8a 0%, var(--primary-blue) 50%, #7c3aed 100%);
    color: var(--white);
    padding: 180px 20px 120px;
    text-align: center;
    margin-top: 60px;
    position: relative;
    overflow: hidden;
}

.hero-bg-animation {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(circle at 20% 50%, rgba(59, 130, 246, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(124, 58, 237, 0.3) 0%, transparent 50%);
    animation: bgMove 15s ease-in-out infinite;
}

@keyframes bgMove {
    0%, 100% {
        transform: translate(0, 0) scale(1);
    }
    50% {
        transform: translate(50px, 30px) scale(1.1);
    }
}

.hero .container {
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    animation: fadeInUp 1s ease-out;
    text-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    letter-spacing: -1px;
}

.hero-subtitle {
    font-size: 1.5rem;
    margin-bottom: 2.5rem;
    opacity: 0.95;
    animation: fadeInUp 1s ease-out 0.2s both;
    text-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.cta-button {
    display: inline-block;
    background: var(--white);
    color: var(--primary-blue);
    padding: 18px 50px;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1.1rem;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    animation: fadeInUp 1s ease-out 0.4s both;
    position: relative;
    overflow: hidden;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
}

.cta-button span {
    position: relative;
    z-index: 2;
}

.button-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: radial-gradient(circle, var(--light-blue), transparent);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
    opacity: 0.3;
}

.cta-button:hover {
    transform: translateY(-5px) scale(1.05);
    box-shadow: 0 20px 50px rgba(37, 99, 235, 0.4);
}

.cta-button:hover .button-glow {
    width: 300px;
    height: 300px;
}

/* 滚动指示器 */
.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s infinite;
}

.mouse {
    width: 30px;
    height: 50px;
    border: 2px solid var(--white);
    border-radius: 15px;
    position: relative;
    opacity: 0.8;
}

.wheel {
    width: 4px;
    height: 10px;
    background: var(--white);
    border-radius: 2px;
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    animation: scroll 1.5s infinite;
}

@keyframes scroll {
    0% {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
    100% {
        opacity: 0;
        transform: translateX(-50%) translateY(15px);
    }
}

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

/* 服务区块 */
.services {
    padding: 100px 20px;
    background: var(--light-gray);
    position: relative;
    z-index: 1;
}

.section-title {
    text-align: center;
    font-size: 2.8rem;
    background: linear-gradient(135deg, var(--dark-blue), var(--primary-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 4rem;
    position: relative;
    padding-bottom: 20px;
    font-weight: 700;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 5px;
    background: linear-gradient(90deg, transparent, var(--primary-blue), transparent);
    border-radius: 2px;
    box-shadow: 0 0 20px var(--primary-blue);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2.5rem;
    margin-top: 3rem;
}

.service-card {
    background: var(--white);
    padding: 3rem;
    border-radius: 20px;
    text-align: center;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    position: relative;
    overflow: hidden;
    border: 1px solid transparent;
}

.card-glow {
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(37, 99, 235, 0.1), transparent 70%);
    opacity: 0;
    transition: opacity 0.6s;
}

.service-card:hover {
    transform: translateY(-15px) scale(1.02);
    box-shadow: 0 20px 60px rgba(37, 99, 235, 0.25);
    border-color: var(--primary-blue);
}

.service-card:hover .card-glow {
    opacity: 1;
    animation: rotate 3s linear infinite;
}

@keyframes rotate {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

.service-icon {
    font-size: 4rem;
    margin-bottom: 1.5rem;
    display: inline-block;
    animation: float-icon 3s ease-in-out infinite;
    filter: drop-shadow(0 5px 15px rgba(37, 99, 235, 0.3));
}

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

.service-card:hover .service-icon {
    animation: float-icon 1s ease-in-out infinite;
    transform: scale(1.1);
}

.service-card h3 {
    color: var(--dark-blue);
    font-size: 1.6rem;
    margin-bottom: 1rem;
    position: relative;
    z-index: 1;
}

.service-card p {
    color: var(--gray);
    line-height: 1.8;
    position: relative;
    z-index: 1;
}

/* 关于我们 */
.about {
    padding: 100px 20px;
    background: var(--white);
    position: relative;
    z-index: 1;
}

.about-content {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}

.about-content p {
    font-size: 1.2rem;
    line-height: 2;
    color: var(--gray);
    margin-bottom: 2rem;
    animation: fadeIn 1s ease-out;
    opacity: 0;
}

.about-content p:nth-child(1) {
    animation-delay: 0.2s;
    animation-fill-mode: forwards;
}

.about-content p:nth-child(2) {
    animation-delay: 0.4s;
    animation-fill-mode: forwards;
}

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

/* 联系我们 */
.contact {
    padding: 100px 20px;
    background: linear-gradient(135deg, var(--lighter-blue) 0%, var(--white) 100%);
    position: relative;
    z-index: 1;
}

.contact-content {
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}

.contact-text {
    font-size: 1.3rem;
    color: var(--gray);
    margin-bottom: 3rem;
}

.contact-info {
    background: var(--white);
    padding: 3rem;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(37, 99, 235, 0.15);
    transition: all 0.4s ease;
    border: 2px solid transparent;
}

.contact-info:hover {
    transform: translateY(-10px);
    box-shadow: 0 30px 80px rgba(37, 99, 235, 0.25);
    border-color: var(--primary-blue);
}

.contact-info p {
    font-size: 1.2rem;
    color: var(--dark-gray);
    margin: 1.5rem 0;
    transition: all 0.3s ease;
}

.contact-info p:hover {
    color: var(--primary-blue);
    transform: translateX(5px);
}

/* 页脚 */
.footer {
    background: linear-gradient(135deg, var(--dark-blue), #1e3a8a);
    color: var(--white);
    text-align: center;
    padding: 2.5rem 20px;
    position: relative;
    z-index: 1;
}

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

/* 滚动动画 */
[data-aos] {
    opacity: 0;
    transform: translateY(50px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

[data-aos].aos-animate {
    opacity: 1;
    transform: translateY(0);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-menu {
        gap: 1rem;
        font-size: 0.9rem;
    }

    .hero {
        padding: 150px 20px 100px;
    }

    .hero-title {
        font-size: 2.2rem;
    }

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

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

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

@media (max-width: 480px) {
    .nav-menu {
        flex-direction: column;
        gap: 0.5rem;
        font-size: 0.85rem;
    }

    .hero {
        padding: 130px 20px 80px;
    }

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

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

    .cta-button {
        padding: 15px 35px;
        font-size: 1rem;
    }
}