/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    font-family: 'Microsoft YaHei', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    overflow-x: hidden;
    overflow-y: hidden;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

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

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

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

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

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

@keyframes glow {
    0%, 100% { box-shadow: 0 0 20px rgba(79, 172, 254, 0.5); }
    50% { box-shadow: 0 0 40px rgba(79, 172, 254, 0.8), 0 0 60px rgba(0, 242, 254, 0.4); }
}

@keyframes shimmer {
    0% { background-position: -200% 0; }
    100% { background-position: 200% 0; }
}

@keyframes borderAnim {
    0%, 100% { border-color: #4facfe; }
    25% { border-color: #00f2fe; }
    50% { border-color: #667eea; }
    75% { border-color: #764ba2; }
}

/* 加载动画页面 */
.loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    overflow: hidden;
    transition: opacity 0.6s ease;
}

.loader.fade-out {
    opacity: 0;
}

.loader-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 30% 40%, rgba(79, 172, 254, 0.15) 0%, transparent 50%),
                radial-gradient(circle at 70% 60%, rgba(118, 75, 162, 0.15) 0%, transparent 50%),
                radial-gradient(circle at 50% 80%, rgba(0, 242, 254, 0.1) 0%, transparent 40%);
    animation: pulse 4s ease-in-out infinite;
}

.loader-circle {
    position: absolute;
    width: 350px;
    height: 350px;
    border: 2px solid rgba(79, 172, 254, 0.3);
    border-radius: 50%;
    animation: rotate 20s linear infinite;
}

.loader-circle::before {
    content: '';
    position: absolute;
    top: -2px;
    left: 50%;
    width: 18px;
    height: 18px;
    background: linear-gradient(135deg, #4facfe, #00f2fe);
    border-radius: 50%;
    transform: translateX(-50%);
    box-shadow: 0 0 20px #4facfe, 0 0 40px #00f2fe;
}

.loader-content {
    position: relative;
    z-index: 10;
    text-align: center;
    padding: 20px;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.loader-logo {
    margin-bottom: 25px;
    animation: float 3s ease-in-out infinite;
}

.loader-logo img {
    width: 100px;
    height: 100px;
    border-radius: 18px;
    box-shadow: 0 0 30px rgba(79, 172, 254, 0.5);
    animation: glow 2s ease-in-out infinite;
    border: 3px solid rgba(79, 172, 254, 0.5);
}

.loader-title {
    font-size: 2rem;
    font-weight: 700;
    color: white;
    margin-bottom: 12px;
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 50%, #667eea 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: 2px;
}

.loader-subtitle {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.6);
    letter-spacing: 4px;
    margin-bottom: 22px;
}

.loader-floating-text {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-bottom: 30px;
}

.float-text {
    font-size: 1.6rem;
    font-weight: 700;
    color: white;
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: floatWord 3s ease-in-out infinite;
    text-shadow: 0 0 15px rgba(79, 172, 254, 0.5);
}

.float-text:nth-child(1) { animation-delay: 0s; }
.float-text:nth-child(2) { animation-delay: 0.15s; }
.float-text:nth-child(3) { animation-delay: 0.3s; }
.float-text:nth-child(4) { animation-delay: 0.45s; }
.float-text:nth-child(5) { animation-delay: 0.6s; }
.float-text:nth-child(6) { animation-delay: 0.75s; }

@keyframes floatWord {
    0%, 100% {
        transform: translateY(0) scale(1);
        opacity: 0.8;
    }
    50% {
        transform: translateY(-18px) scale(1.15);
        opacity: 1;
    }
}

.loader-buttons {
    display: flex;
    justify-content: center;
    gap: 18px;
    flex-wrap: wrap;
    z-index: 20;
    position: relative;
}

.enter-btn {
    position: relative;
    padding: 14px 45px;
    font-size: 1rem;
    font-weight: 600;
    color: white;
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    border: none;
    border-radius: 40px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    box-shadow: 0 4px 20px rgba(79, 172, 254, 0.4);
    z-index: 21;
    min-width: 140px;
}

.enter-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(79, 172, 254, 0.5);
}

.enter-btn:active {
    transform: translateY(-1px);
}

.enter-btn i {
    transition: transform 0.3s ease;
}

.enter-btn:hover i {
    transform: translateX(4px);
}

.portal-btn {
    position: relative;
    padding: 14px 45px;
    font-size: 1rem;
    font-weight: 600;
    color: #4facfe;
    background: transparent;
    border: 2px solid rgba(79, 172, 254, 0.6);
    border-radius: 40px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    text-decoration: none;
    z-index: 21;
    min-width: 140px;
}

.portal-btn:hover {
    background: linear-gradient(135deg, rgba(79, 172, 254, 0.1) 0%, rgba(0, 242, 254, 0.1) 100%);
    border-color: #4facfe;
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(79, 172, 254, 0.3);
}

.portal-btn:active {
    transform: translateY(-1px);
}

.portal-btn i {
    transition: transform 0.3s ease;
}

.portal-btn:hover i {
    transform: translateX(4px);
}

.loader-tip {
    margin-top: 18px;
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.5);
}

.loader-footer {
    position: absolute;
    bottom: 20px;
    left: 0;
    right: 0;
    text-align: center;
    padding: 20px;
}

.loader-footer p {
    margin: 5px 0;
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.4);
}

/* 主页面内容 */
.main-content {
    transition: opacity 0.8s ease;
    min-height: 100vh;
}

.main-content.hidden {
    opacity: 0;
    visibility: hidden;
    overflow: hidden;
}

.main-content.fade-in {
    opacity: 1;
    visibility: visible;
    overflow-y: auto;
}

.main-content.fade-in body {
    overflow-y: auto;
}

/* 顶部导航栏 */
header {
    background: linear-gradient(135deg, #ffffff 0%, #f8f9ff 100%);
    padding: 15px 0;
    box-shadow: 0 4px 20px rgba(102, 126, 234, 0.1);
    border-radius: 0 0 20px 20px;
    margin-bottom: 25px;
    animation: fadeIn 1s ease-in-out;
    position: relative;
    overflow: hidden;
}

header::before {
    content: '';
    position: absolute;
    top: 0;
    left: -50%;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, transparent, #4facfe, #00f2fe, #4facfe, transparent);
    animation: shimmer 3s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 25px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 18px;
    flex: 1;
}

.logo img {
    width: 80px;
    height: 80px;
    border-radius: 15px;
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.15);
    animation: float 4s ease-in-out infinite;
    border: 3px solid rgba(255, 255, 255, 0.8);
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-5px); }
}

.logo-text {
    display: flex;
    flex-direction: column;
    gap: 3px;
}

.logo-text h1 {
    font-size: 1.65rem;
    font-weight: 700;
    color: #2c3e50;
    margin: 0;
    letter-spacing: 1px;
    background: linear-gradient(135deg, #2c3e50 0%, #667eea 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo-text .subtitle {
    font-size: 0.78rem;
    color: #7f8c8d;
    font-weight: 500;
    letter-spacing: 2px;
    margin: 0;
}

.header-info {
    display: flex;
    align-items: center;
    gap: 20px;
    flex-wrap: wrap;
}

.header-info .contact-info {
    display: flex;
    gap: 15px;
    align-items: center;
}

.header-info .contact-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 22px;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.9) 0%, rgba(248, 249, 255, 0.9) 100%);
    border-radius: 35px;
    border: 1.5px solid rgba(79, 172, 254, 0.3);
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.1);
    transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: default;
}

.header-info .contact-item:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 8px 25px rgba(79, 172, 254, 0.2);
    border-color: rgba(79, 172, 254, 0.5);
}

.header-info .contact-item i {
    color: #4facfe;
    font-size: 1.15rem;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.header-info .contact-item span {
    color: #34495e;
    font-weight: 600;
    font-size: 0.95rem;
    letter-spacing: 0.5px;
}

.header-info p {
    margin: 5px 0;
    color: #666;
    font-size: 0.95rem;
}

.header-info i {
    margin-right: 8px;
    color: #4facfe;
}

/* 导航菜单 */
nav {
    background: rgba(255, 255, 255, 0.95);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    border-radius: 15px;
    margin: 0 auto 20px;
    max-width: 1200px;
    position: sticky;
    top: 10px;
    z-index: 1000;
    animation: fadeIn 1s ease-in-out 0.2s both;
}

.nav-menu {
    display: flex;
    list-style: none;
    justify-content: center;
    flex-wrap: wrap;
    padding: 15px 10px;
}

.nav-menu li {
    margin: 0 8px;
}

.nav-menu a {
    display: block;
    padding: 12px 22px;
    color: #333;
    text-decoration: none;
    transition: all 0.3s ease;
    font-weight: 500;
    border-radius: 10px;
    border: 2px solid transparent;
}

.nav-menu a:hover,
.nav-menu a.active {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(79, 172, 254, 0.4);
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 14px 30px;
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    color: white;
    text-decoration: none;
    border-radius: 12px;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    font-weight: 600;
    font-size: 1rem;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15);
}

.btn:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 25px rgba(79, 172, 254, 0.4);
}

.btn-secondary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.btn-secondary:hover {
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4);
}

/* 主内容区 */
main {
    padding: 20px 0 80px;
}

/* 首页横幅 */
.hero {
    background: url('jz.jpg') center/cover no-repeat;
    min-height: 550px;
    position: relative;
    border-radius: 20px;
    overflow: hidden;
    margin-bottom: 30px;
    animation: fadeIn 1s ease-in-out;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.85) 0%, rgba(118, 75, 162, 0.85) 100%);
    display: flex;
    align-items: center;
}

.hero-content {
    text-align: center;
    color: white;
    animation: slideIn 1s ease-in-out 0.3s both;
}

.hero-content h2 {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 15px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
}

.hero-content h3 {
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: 25px;
    opacity: 0.95;
}

.hero-content p {
    font-size: 1.15rem;
    max-width: 800px;
    margin: 0 auto 35px;
    opacity: 0.9;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

/* 通用区块样式 */
.section-container {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 15px;
    padding: 50px 40px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    margin-bottom: 30px;
    animation: fadeIn 1s ease-in-out;
}

.section-header {
    text-align: center;
    margin-bottom: 40px;
}

.section-header h2 {
    font-size: 2.2rem;
    font-weight: 700;
    color: #333;
    margin-bottom: 15px;
}

.section-header i {
    margin-right: 12px;
    color: #4facfe;
}

.section-divider {
    width: 80px;
    height: 4px;
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    margin: 0 auto;
    border-radius: 2px;
}

/* 关于我们 */
.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
}

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

.about-text p {
    font-size: 1rem;
    color: #555;
    line-height: 1.8;
    margin-bottom: 15px;
    text-align: justify;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-top: 30px;
}

.stat-item {
    text-align: center;
    padding: 20px;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border-radius: 12px;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: #4facfe;
    margin-bottom: 5px;
}

.stat-label {
    font-size: 0.9rem;
    color: #666;
}

.about-image img {
    width: 100%;
    border-radius: 12px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
}

/* 业务范围 */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.service-card {
    background: linear-gradient(135deg, #f8f9fa 0%, #ffffff 100%);
    padding: 35px 25px;
    border-radius: 15px;
    text-align: center;
    transition: all 0.3s ease;
    border: 1px solid #e0e0e0;
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.12);
    border-color: #4facfe;
}

.service-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 1.8rem;
    color: white;
    box-shadow: 0 8px 20px rgba(79, 172, 254, 0.3);
}

.service-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: #333;
    margin-bottom: 12px;
}

.service-card p {
    font-size: 0.95rem;
    color: #666;
    line-height: 1.6;
}

/* 代表作品 */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
}

.project-card {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.project-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.15);
}

.project-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.project-card:hover img {
    transform: scale(1.05);
}

.project-info {
    padding: 20px;
}

.project-info h3 {
    font-size: 1.2rem;
    font-weight: 600;
    color: #333;
    margin-bottom: 10px;
}

.project-info p {
    font-size: 0.9rem;
    color: #666;
    margin-bottom: 8px;
}

.project-type {
    display: inline-block;
    padding: 4px 12px;
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    color: white;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
}

/* 资质荣誉 */
.honors-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.honors-left h3,
.honors-right h3 {
    font-size: 1.4rem;
    font-weight: 600;
    color: #333;
    margin-bottom: 25px;
}

.honors-list {
    list-style: none;
}

.honors-list li {
    padding: 15px 0;
    border-bottom: 1px solid #e0e0e0;
    color: #555;
    font-size: 1rem;
}

.honors-list li:last-child {
    border-bottom: none;
}

.honors-list i {
    margin-right: 12px;
    color: #4facfe;
    font-size: 1.1rem;
}

.awards-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.award-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 20px;
    background: linear-gradient(135deg, #f8f9fa 0%, #ffffff 100%);
    border-radius: 12px;
    border: 1px solid #e0e0e0;
}

.award-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    color: white;
}

.award-title {
    font-size: 0.95rem;
    font-weight: 600;
    color: #333;
    margin-bottom: 3px;
}

.award-count {
    font-size: 0.85rem;
    color: #4facfe;
    font-weight: 600;
}

/* 专家团队 */
.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.team-card {
    background: linear-gradient(135deg, #f8f9fa 0%, #ffffff 100%);
    padding: 35px 25px;
    border-radius: 15px;
    text-align: center;
    transition: all 0.3s ease;
    border: 1px solid #e0e0e0;
}

.team-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.12);
    border-color: #4facfe;
}

.team-avatar {
    width: 100px;
    height: 100px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 3rem;
    color: white;
    box-shadow: 0 8px 20px rgba(102, 126, 234, 0.3);
}

.team-card h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: #333;
    margin-bottom: 8px;
}

.team-title {
    font-size: 0.95rem;
    color: #4facfe;
    font-weight: 500;
    margin-bottom: 15px;
}

.team-info {
    font-size: 0.9rem;
    color: #666;
    line-height: 1.6;
}

/* 联系我们 */
.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.contact-item {
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.contact-item i {
    width: 45px;
    height: 45px;
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: white;
    flex-shrink: 0;
}

.contact-item h4 {
    font-size: 1.1rem;
    font-weight: 600;
    color: #333;
    margin-bottom: 8px;
}

.contact-item p {
    font-size: 0.95rem;
    color: #555;
    margin: 3px 0;
}

.contact-form {
    background: linear-gradient(135deg, #f8f9fa 0%, #ffffff 100%);
    padding: 35px;
    border-radius: 15px;
    border: 1px solid #e0e0e0;
}

.contact-form h3 {
    font-size: 1.4rem;
    font-weight: 600;
    color: #333;
    margin-bottom: 25px;
}

.contact-form .form-group {
    margin-bottom: 20px;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 14px 18px;
    border: 2px solid #e0e0e0;
    border-radius: 10px;
    font-size: 1rem;
    font-family: inherit;
    transition: all 0.3s ease;
    background: white;
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: #4facfe;
    box-shadow: 0 0 0 3px rgba(79, 172, 254, 0.1);
}

.contact-form textarea {
    resize: vertical;
    min-height: 120px;
}

.contact-form input::placeholder,
.contact-form textarea::placeholder {
    color: #999;
}

/* 页脚 */
footer {
    background: rgba(50, 50, 50, 0.95);
    color: white;
    padding: 50px 0 30px;
    margin-top: 40px;
}

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

.footer-section h3 {
    font-size: 1.4rem;
    font-weight: 600;
    margin-bottom: 15px;
}

.footer-section h4 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 15px;
    color: #4facfe;
}

.footer-section p {
    color: #aaa;
    margin: 8px 0;
}

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

.footer-section ul li {
    margin-bottom: 10px;
}

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

.footer-section ul a:hover {
    color: #4facfe;
}

.footer-section i {
    margin-right: 10px;
}

.footer-bottom {
    text-align: center;
    padding-top: 25px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    color: #888;
    font-size: 0.9rem;
    margin: 5px 0;
}

/* 返回顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 55px;
    height: 55px;
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    border: none;
    border-radius: 50%;
    color: white;
    font-size: 1.3rem;
    cursor: pointer;
    box-shadow: 0 5px 15px rgba(79, 172, 254, 0.4);
    transition: all 0.3s ease;
    display: none;
    z-index: 1000;
}

.back-to-top:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(79, 172, 254, 0.5);
}

/* 响应式设计 */
@media (max-width: 992px) {
    .about-content,
    .honors-content,
    .contact-content {
        grid-template-columns: 1fr;
    }

    .hero-content h2 {
        font-size: 2.5rem;
    }

    .hero-content h3 {
        font-size: 1.5rem;
    }

    .about-stats {
        grid-template-columns: repeat(2, 1fr);
    }

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

@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        text-align: center;
    }

    .header-info {
        text-align: center;
    }

    .logo-text h1 {
        font-size: 1.4rem;
    }

    .nav-menu a {
        padding: 10px 15px;
        font-size: 0.9rem;
    }

    .hero-content h2 {
        font-size: 2rem;
    }

    .hero-content h3 {
        font-size: 1.2rem;
    }

    .hero-content p {
        font-size: 1rem;
    }

    .section-container {
        padding: 30px 20px;
    }

    .section-header h2 {
        font-size: 1.8rem;
    }

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

    .btn {
        padding: 12px 24px;
        font-size: 0.9rem;
    }
}

@media (max-width: 576px) {
    .hero-content h2 {
        font-size: 1.6rem;
    }

    .nav-menu {
        padding: 10px 5px;
    }

    .nav-menu li {
        margin: 3px 5px;
    }

    .nav-menu a {
        padding: 8px 12px;
        font-size: 0.85rem;
    }
}