* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Microsoft YaHei', 'PingFang SC', 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.8;
    color: #333;
    background-color: #f5f7fa;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.3s ease;
}

.q5w8r1t6y {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    box-shadow: 0 2px 15px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
    animation: slideDown 0.5s ease-out;
}

@keyframes slideDown {
    from {
        transform: translateY(-100%);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.a3s9d2f7g {
    padding: 0;
}

.h4j6k8l0m {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
}

.z9x7c5v3b a {
    color: white;
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: 2px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.2);
}

.z9x7c5v3b a:hover {
    opacity: 0.9;
    transform: scale(1.05);
    display: inline-block;
    transition: all 0.3s ease;
}

.n2m4b6v8c {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.n2m4b6v8c li a {
    color: white;
    font-weight: 500;
    padding: 0.6rem 1.2rem;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.n2m4b6v8c li a:hover,
.n2m4b6v8c li a.active {
    background-color: rgba(255,255,255,0.25);
    transform: translateY(-2px);
}

.t7r5e3w1q {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 5rem 2rem;
    position: relative;
    overflow: hidden;
}

.t7r5e3w1q::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><circle cx="50" cy="50" r="40" fill="rgba(255,255,255,0.05)"/></svg>');
    animation: float 20s linear infinite;
}

@keyframes float {
    from {
        transform: translateX(0) translateY(0);
    }
    to {
        transform: translateX(-100px) translateY(-100px);
    }
}

.y9u7i5o3p {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    position: relative;
    z-index: 1;
}

.a1s3d5f7g {
    animation: fadeInLeft 1s ease-out;
}

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

.h9j8k7l6m {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    line-height: 1.2;
    text-shadow: 2px 2px 8px rgba(0,0,0,0.3);
}

.z6x5c4v3b {
    font-size: 1.3rem;
    margin-bottom: 2.5rem;
    opacity: 0.95;
    line-height: 1.6;
}

.n8m7b6v5c {
    display: inline-block;
    background-color: white;
    color: #667eea;
    padding: 1rem 2.5rem;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}

.n8m7b6v5c:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.3);
    background-color: #f0f0f0;
}

.q2w3e4r5t {
    animation: fadeInRight 1s ease-out;
}

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

.y6u5i4o3p {
    width: 100%;
    border-radius: 20px;
    box-shadow: 0 15px 50px rgba(0,0,0,0.4);
    transition: transform 0.5s ease;
}

.y6u5i4o3p:hover {
    transform: scale(1.05) rotate(2deg);
}

.h9j8k7l6n {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.t5r4e3w2q {
    padding: 5rem 0;
    background-color: white;
}

.p0o9i8u7y {
    font-size: 2.8rem;
    text-align: center;
    margin-bottom: 3rem;
    color: #2d3748;
    position: relative;
    padding-bottom: 1rem;
}

.p0o9i8u7y::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(to right, #667eea, #764ba2);
    border-radius: 2px;
}

.a6s5d4f3g {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2.5rem;
}

.h2j3k4l5m {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0,0,0,0.08);
    transition: all 0.4s ease;
    animation: fadeInUp 0.6s ease-out;
}

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

.h2j3k4l5m:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(102, 126, 234, 0.2);
}

.z7x6c5v4b {
    overflow: hidden;
    height: 250px;
}

.n3m2b1v0c {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.h2j3k4l5m:hover .n3m2b1v0c {
    transform: scale(1.15);
}

.q9w8e7r6t {
    padding: 2rem;
}

.y5u4i3o2p {
    font-size: 1.6rem;
    margin-bottom: 0.8rem;
    color: #2d3748;
    transition: color 0.3s ease;
}

.h2j3k4l5m:hover .y5u4i3o2p {
    color: #667eea;
}

.t1r2e3w4q {
    display: block;
    color: #718096;
    font-size: 0.95rem;
    margin-bottom: 1rem;
}

.o8p7i6u5y {
    color: #4a5568;
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

.a4s3d2f1g {
    color: #667eea;
    font-weight: 600;
    transition: all 0.3s ease;
}

.a4s3d2f1g:hover {
    color: #764ba2;
    text-decoration: underline;
}

.h6j5k4l3m {
    padding: 5rem 0;
    background-color: #f7fafc;
}

.z2x3c4v5b {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.n6m5b4v3c {
    position: relative;
    border-radius: 15px;
    overflow: hidden;
    height: 320px;
    cursor: pointer;
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
    transition: all 0.4s ease;
}

.n6m5b4v3c:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 40px rgba(0,0,0,0.2);
}

.q8w7e6r5t {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
}

.n6m5b4v3c:hover .q8w7e6r5t {
    transform: scale(1.2);
}

.y4u3i2o1p {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.85), transparent);
    color: white;
    padding: 2rem 1.5rem;
    transform: translateY(0);
    transition: all 0.4s ease;
}

.t9r8e7w6q {
    font-size: 1.4rem;
    margin-bottom: 0.5rem;
}

.o5p4i3u2y {
    font-size: 0.95rem;
    opacity: 0.9;
}

.a7s6d5f4g {
    padding: 5rem 0;
    background-color: white;
}

.h3j4k5l6m {
    display: grid;
    gap: 2rem;
}

.z8x7c6v5b {
    background: #f7fafc;
    padding: 2rem;
    border-radius: 12px;
    border-left: 5px solid #667eea;
    transition: all 0.3s ease;
    animation: slideInLeft 0.6s ease-out;
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.z8x7c6v5b:hover {
    transform: translateX(10px);
    box-shadow: 0 5px 20px rgba(102, 126, 234, 0.15);
}

.n2m3b4v5c {
    display: inline-block;
    background: #667eea;
    color: white;
    padding: 0.4rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.q9w8e7r6t {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: #2d3748;
}

.y6u5i4o3p {
    color: #4a5568;
    line-height: 1.8;
    margin-bottom: 1rem;
}

.t2r3e4w5q {
    color: #667eea;
    font-weight: 600;
    transition: color 0.3s ease;
}

.t2r3e4w5q:hover {
    color: #764ba2;
    text-decoration: underline;
}

.o9p8i7u6y {
    padding: 5rem 0;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.05) 0%, rgba(118, 75, 162, 0.05) 100%);
}

.t5r4e3w2q {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.a8s7d6f5g h2 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    color: #2d3748;
}

.z1x2c3v4b {
    color: #4a5568;
    line-height: 1.9;
    margin-bottom: 1.5rem;
    text-align: justify;
}

.n6m5b4v3c {
    display: inline-block;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 1rem 2rem;
    border-radius: 50px;
    font-weight: 600;
    transition: all 0.3s ease;
    margin-top: 1rem;
}

.n6m5b4v3c:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4);
}

.y7u6i5o4p {
    width: 100%;
    border-radius: 20px;
    box-shadow: 0 15px 50px rgba(0,0,0,0.15);
}

.t8r7e6w5q {
    background-color: #2d3748;
    color: white;
    padding: 3rem 0 1.5rem;
    margin-top: 5rem;
}

.o2p3i4u5y {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    margin-bottom: 2rem;
}

.a9s8d7f6g h3 {
    font-size: 1.4rem;
    margin-bottom: 1rem;
    color: white;
}

.z4x3c2v1b {
    color: #cbd5e0;
    line-height: 1.8;
    margin-bottom: 0.8rem;
}

.n7m6b5v4c {
    list-style: none;
}

.n7m6b5v4c li {
    margin-bottom: 0.8rem;
}

.n7m6b5v4c li a {
    color: #cbd5e0;
    transition: color 0.3s ease;
}

.n7m6b5v4c li a:hover {
    color: white;
    padding-left: 5px;
    display: inline-block;
}

.q8w7e6r5t {
    border-top: 1px solid #4a5568;
    padding-top: 2rem;
    text-align: center;
}

.y3u2i1o0p {
    color: #cbd5e0;
    font-size: 0.95rem;
}

.k7d4s8m2w {
    background-color: #f7fafc;
    padding: 1rem 0;
    border-bottom: 1px solid #e2e8f0;
}

.k7d4s8m2w a {
    color: #667eea;
    transition: color 0.3s ease;
}

.k7d4s8m2w a:hover {
    color: #764ba2;
    text-decoration: underline;
}

.k7d4s8m2w span {
    color: #718096;
}

.r9t4y6u2o {
    padding: 3rem 0;
    min-height: 60vh;
}

.w5e7q3a1z {
    background: white;
    border-radius: 15px;
    padding: 3rem;
    box-shadow: 0 5px 20px rgba(0,0,0,0.08);
    margin-bottom: 2rem;
}

.x8c6v4b2n {
    margin-bottom: 2rem;
    border-bottom: 2px solid #e2e8f0;
    padding-bottom: 1.5rem;
}

.m5k3j7h9l {
    font-size: 2.5rem;
    color: #2d3748;
    margin-bottom: 1rem;
}

.p2o4i6u8y {
    color: #718096;
    font-size: 0.95rem;
}

.t1r3e5w7q {
    margin-bottom: 2.5rem;
}

.y9u7i5o3p {
    width: 100%;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

.a4s6d8f0g h3 {
    font-size: 1.8rem;
    color: #2d3748;
    margin: 2.5rem 0 1.5rem;
    padding-left: 1rem;
    border-left: 4px solid #667eea;
}

.z7x5c3v1b {
    color: #4a5568;
    line-height: 2;
    margin-bottom: 1.5rem;
    text-align: justify;
}

.n6m8b0v2c {
    margin: 2rem 0;
}

.q3w5e7r9t {
    width: 100%;
    border-radius: 12px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.o8p6i4u2y {
    margin-top: 3rem;
}

.t5r3e1w9q {
    background: #f7fafc;
    border-radius: 12px;
    padding: 2rem;
    box-shadow: 0 3px 10px rgba(0,0,0,0.05);
}

.a7s5d3f1g {
    font-size: 1.5rem;
    color: #2d3748;
    margin-bottom: 1.5rem;
}

.h8j6k4l2m {
    list-style: none;
}

.h8j6k4l2m li {
    margin-bottom: 1rem;
}

.h8j6k4l2m li a {
    color: #667eea;
    transition: all 0.3s ease;
    display: block;
    padding: 0.5rem;
    border-radius: 6px;
}

.h8j6k4l2m li a:hover {
    background-color: #edf2f7;
    padding-left: 1rem;
}

.q7w5e3r1t {
    background: #f7fafc;
    border-radius: 10px;
    padding: 2rem;
    margin: 2rem 0;
}

.q7w5e3r1t p {
    margin-bottom: 1rem;
}

@media (max-width: 968px) {
    .h4j6k8l0m {
        flex-direction: column;
        gap: 1rem;
    }

    .n2m4b6v8c {
        flex-wrap: wrap;
        justify-content: center;
        gap: 1rem;
    }

    .y9u7i5o3p,
    .t5r4e3w2q {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .h9j8k7l6m {
        font-size: 2.5rem;
    }

    .a6s5d4f3g,
    .z2x3c4v5b {
        grid-template-columns: 1fr;
    }

    .w5e7q3a1z {
        padding: 1.5rem;
    }

    .m5k3j7h9l {
        font-size: 2rem;
    }
}

@media (max-width: 576px) {
    .h9j8k7l6m {
        font-size: 2rem;
    }

    .z6x5c4v3b {
        font-size: 1.1rem;
    }

    .p0o9i8u7y {
        font-size: 2rem;
    }
}

#backToTop {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
    z-index: 999;
    display: flex;
    align-items: center;
    justify-content: center;
}

#backToTop.show {
    opacity: 1;
    visibility: visible;
}

#backToTop:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4);
}