/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Microsoft YaHei', sans-serif;
}

body {
    background-color: #f8f9fa;
    color: #333;
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

a {
    text-decoration: none;
    color: #333;
    transition: all 0.3s ease;
}

ul {
    list-style: none;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 12px 28px;
    border-radius: 30px;
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-right: 15px;
    margin-bottom: 15px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.2);
    transition: all 0.4s ease;
    z-index: -1;
}

.btn:hover::before {
    left: 0;
}

.btn-primary {
    background: linear-gradient(135deg, #4285f4, #3367d6);
    color: white;
    border: none;
}

.btn-primary:hover {
    box-shadow: 0 6px 15px rgba(66, 133, 244, 0.3);
    transform: translateY(-2px);
}

.btn-secondary {
    background-color: transparent;
    color: #4285f4;
    border: 2px solid #4285f4;
}

.btn-secondary:hover {
    background-color: #4285f4;
    color: white;
    box-shadow: 0 6px 15px rgba(66, 133, 244, 0.3);
    transform: translateY(-2px);
}

/* 头部导航 */
header {
    background-color: rgba(255, 255, 255, 0.95);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px;
}

.logo h1 {
    font-size: 1.8rem;
    background: linear-gradient(135deg, #4285f4, #34a853);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    font-weight: 700;
}

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

.nav-links li {
    margin-left: 25px;
}

.nav-links a {
    font-weight: 600;
    position: relative;
    padding: 5px 0;
}

.nav-links a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 3px;
    background: linear-gradient(135deg, #4285f4, #34a853);
    bottom: -5px;
    left: 0;
    transition: width 0.3s ease;
}

.nav-links a:hover {
    color: #4285f4;
}

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

.nav-links a.active {
    color: #4285f4;
}

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

.burger {
    display: none;
    cursor: pointer;
}

.burger div {
    width: 25px;
    height: 3px;
    background-color: #333;
    margin: 5px;
    transition: all 0.3s ease;
}

/* 英雄区域 */
.hero {
    padding: 100px 0;
    background: linear-gradient(135deg, #f5f7fa 0%, #e4e7eb 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50px;
    right: -50px;
    width: 300px;
    height: 300px;
    border-radius: 50%;
    background: linear-gradient(135deg, rgba(66, 133, 244, 0.1), rgba(52, 168, 83, 0.1));
    z-index: 0;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -100px;
    left: -100px;
    width: 400px;
    height: 400px;
    border-radius: 50%;
    background: linear-gradient(135deg, rgba(234, 67, 53, 0.1), rgba(251, 188, 5, 0.1));
    z-index: 0;
}

.hero .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: relative;
    z-index: 1;
}

.hero-content {
    flex: 1;
    padding-right: 50px;
}

.hero-content h2 {
    font-size: 3rem;
    margin-bottom: 25px;
    color: #333;
    line-height: 1.2;
    font-weight: 700;
    background: linear-gradient(135deg, #4285f4, #34a853);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.hero-content p {
    font-size: 1.2rem;
    margin-bottom: 35px;
    color: #666;
    line-height: 1.8;
}

.cta-buttons {
    display: flex;
    flex-wrap: wrap;
}

.hero-image {
    flex: 1;
    text-align: center;
    position: relative;
}

.hero-image::before {
    content: '';
    position: absolute;
    width: 100%;
    height: 20px;
    bottom: 0;
    left: 0;
    background: radial-gradient(ellipse at center, rgba(0,0,0,0.2) 0%, rgba(0,0,0,0) 70%);
    opacity: 0.3;
}

.hero-image img {
    max-width: 100%;
    height: auto;
    animation: float 6s ease-in-out infinite;
    filter: drop-shadow(0 15px 15px rgba(0,0,0,0.1));
    transition: all 0.5s ease;
}

.hero-image img:hover {
    transform: scale(1.05) translateY(-10px);
    filter: drop-shadow(0 20px 20px rgba(0,0,0,0.15));
}

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

/* 特点部分 */
.features {
    padding: 100px 0;
    background-color: white;
    position: relative;
    overflow: hidden;
}

.features::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100px;
    background: linear-gradient(to bottom, #f8f9fa, white);
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 60px;
    color: #333;
    position: relative;
    font-weight: 700;
}

.section-title::after {
    content: '';
    position: absolute;
    width: 100px;
    height: 5px;
    background: linear-gradient(135deg, #4285f4, #34a853);
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    border-radius: 10px;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
}

.feature-card {
    background-color: #f8f9fa;
    border-radius: 15px;
    padding: 40px 30px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(66, 133, 244, 0.1), rgba(52, 168, 83, 0.1));
    z-index: -1;
    opacity: 0;
    transition: opacity 0.4s ease;
}

.feature-card:hover {
    transform: translateY(-15px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

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

.feature-card i {
    font-size: 3rem;
    color: #4285f4;
    margin-bottom: 25px;
    transition: all 0.4s ease;
}

.feature-card:hover i {
    transform: scale(1.2);
    color: #34a853;
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 20px;
    color: #333;
    font-weight: 600;
}

.feature-card p {
    color: #666;
    line-height: 1.7;
}

/* 关于部分 */
.about {
    padding: 100px 0;
    background-color: #f8f9fa;
    position: relative;
    overflow: hidden;
}

.about::before {
    content: '';
    position: absolute;
    top: -100px;
    right: -100px;
    width: 300px;
    height: 300px;
    border-radius: 50%;
    background: linear-gradient(135deg, rgba(66, 133, 244, 0.1), rgba(52, 168, 83, 0.1));
}

.about-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
    position: relative;
    z-index: 1;
}

.about-content p {
    margin-bottom: 25px;
    font-size: 1.2rem;
    color: #666;
    line-height: 1.8;
}

/* 探索更多内容 */
.explore-sections {
    padding: 100px 0;
    background-color: white;
    position: relative;
}

.explore-sections::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100px;
    background: linear-gradient(to bottom, #f8f9fa, white);
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
    margin-top: 50px;
}

.card {
    background-color: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    transition: all 0.4s ease;
    position: relative;
}

.card:hover {
    transform: translateY(-15px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.card-image {
    width: 100%;
    height: 220px;
    overflow: hidden;
    position: relative;
}

.card-image::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, rgba(0,0,0,0), rgba(0,0,0,0.2));
}

.card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.card:hover .card-image img {
    transform: scale(1.1);
}

.card-content {
    padding: 30px;
}

.card-content h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: #333;
    font-weight: 600;
}

.card-content p {
    color: #666;
    margin-bottom: 25px;
    line-height: 1.7;
}

/* 页脚 */
footer {
    background: linear-gradient(135deg, #333 0%, #222 100%);
    color: white;
    padding: 80px 0 20px;
    position: relative;
    overflow: hidden;
}

footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: linear-gradient(90deg, #4285f4, #34a853, #fbbc05, #ea4335);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    margin-bottom: 60px;
}

.footer-logo h3 {
    font-size: 1.8rem;
    margin-bottom: 15px;
    background: linear-gradient(135deg, #4285f4, #34a853);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    font-weight: 700;
}

.footer-logo p {
    color: #ccc;
    line-height: 1.7;
}

.footer-links h4 {
    font-size: 1.3rem;
    margin-bottom: 25px;
    color: white;
    position: relative;
    padding-bottom: 10px;
}

.footer-links h4::after {
    content: '';
    position: absolute;
    width: 50px;
    height: 3px;
    background: linear-gradient(135deg, #4285f4, #34a853);
    bottom: 0;
    left: 0;
    border-radius: 10px;
}

.footer-links ul li {
    margin-bottom: 15px;
    transition: all 0.3s ease;
}

.footer-links ul li:hover {
    transform: translateX(5px);
}

.footer-links ul li a {
    color: #ccc;
    transition: all 0.3s ease;
    display: inline-block;
}

.footer-links ul li a:hover {
    color: #4285f4;
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: #ccc;
}

/* 响应式设计 */
@media screen and (max-width: 992px) {
    .hero-content h2 {
        font-size: 2.5rem;
    }
    
    .section-title {
        font-size: 2.2rem;
    }
}

@media screen and (max-width: 768px) {
    .nav-links {
        position: fixed;
        right: 0;
        height: 100vh;
        top: 0;
        background-color: white;
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        width: 70%;
        transform: translateX(100%);
        transition: transform 0.5s ease-in;
        box-shadow: -5px 0 10px rgba(0, 0, 0, 0.1);
        z-index: 1001;
    }

    .nav-links li {
        opacity: 0;
        margin: 20px 0;
    }

    .burger {
        display: block;
        z-index: 1002;
    }

    .nav-active {
        transform: translateX(0%);
    }

    @keyframes navLinkFade {
        from {
            opacity: 0;
            transform: translateX(50px);
        }
        to {
            opacity: 1;
            transform: translateX(0);
        }
    }

    .toggle .line1 {
        transform: rotate(-45deg) translate(-5px, 6px);
    }

    .toggle .line2 {
        opacity: 0;
    }

    .toggle .line3 {
        transform: rotate(45deg) translate(-5px, -6px);
    }

    .hero .container {
        flex-direction: column;
        text-align: center;
    }

    .hero-content {
        padding-right: 0;
        margin-bottom: 50px;
    }

    .cta-buttons {
        justify-content: center;
    }
    
    .hero-content h2 {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
}

@media screen and (max-width: 576px) {
    .hero-content h2 {
        font-size: 1.8rem;
    }
    
    .hero-content p {
        font-size: 1rem;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
    
    .feature-card {
        padding: 30px 20px;
    }
    
    .btn {
        padding: 10px 20px;
        font-size: 0.9rem;
    }
}

/* 动画效果 */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

.delay-1 {
    transition-delay: 0.2s;
}

.delay-2 {
    transition-delay: 0.4s;
}

.delay-3 {
    transition-delay: 0.6s;
}

.delay-4 {
    transition-delay: 0.8s;
}