:root {
    --primary-blue: #1e88e5;
    --primary-dark-blue: #0d47a1;
    --accent-blue: #42a5f5;
    --light-blue: #e3f2fd;
    --white: #ffffff;
    --light-gray: #f5f7fa;
    --text-dark: #263238;
    --text-light: #607d8b;
    --success: #4caf50;
    --warning: #ff9800;
    --card-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    --transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

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

body {
    font-family: 'Roboto', sans-serif;
    color: var(--text-light);
    background-color: var(--white);
    overflow-x: hidden;
    line-height: 1.7;
}

h1, h2, h3, h4, h5 {
    font-family: 'Montserrat', sans-serif;
    color: var(--text-dark);
    font-weight: 700;
}

/* 头部与导航 */
.header {
    background-color: var(--white);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.05);
    padding: 15px 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    transition: var(--transition);
}

.header.scrolled {
    padding: 10px 0;
    box-shadow: 0 5px 25px rgba(0, 0, 0, 0.1);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 20px;
}

.logo {
    font-size: 28px;
    font-weight: 700;
    color: var(--primary-dark-blue);
    display: flex;
    align-items: center;
}

.logo i {
    margin-right: 10px;
    color: var(--primary-blue);
    font-size: 32px;
}

.nav-links {
    display: flex;
    gap: 35px;
}

.nav-links a {
    color: var(--text-dark);
    text-decoration: none;
    font-weight: 500;
    font-size: 17px;
    transition: var(--transition);
    position: relative;
    padding: 5px 0;
}

.nav-links a:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 3px;
    background: var(--primary-blue);
    transition: var(--transition);
}

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

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

.nav-links a.active {
    color: var(--primary-blue);
}

.cta-button {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-dark-blue) 100%);
    color: var(--white);
    padding: 14px 32px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 600;
    font-size: 16px;
    transition: var(--transition);
    box-shadow: 0 5px 15px rgba(30, 136, 229, 0.4);
    display: inline-block;
}

.cta-button:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(13, 71, 161, 0.5);
}

.secondary-btn {
    background: transparent;
    color: var(--primary-blue);
    border: 2px solid var(--primary-blue);
    padding: 12px 28px;
    border-radius: 30px;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
}

.secondary-btn:hover {
    background: rgba(30, 136, 229, 0.1);
    transform: translateY(-3px);
}

/* Hero 区域 */
.hero {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-dark-blue) 100%);
    padding: 180px 0 120px;
    position: relative;
    overflow: hidden;
    margin-top: 60px;
}

.hero:before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100" preserveAspectRatio="none"><path d="M0,0 L100,0 L100,100 Q75,85 50,100 T0,85 Z" fill="rgba(255,255,255,0.05)"/></svg>');
    background-size: 100% auto;
    background-position: bottom;
    background-repeat: no-repeat;
}

.hero-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
    position: relative;
    z-index: 2;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
}

.hero-content {
    flex: 1;
    min-width: 300px;
    padding-right: 50px;
}

.hero h1 {
    font-size: 56px;
    color: var(--white);
    line-height: 1.2;
    margin-bottom: 20px;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.hero h1 span {
    color: #ffd54f;
}

.hero p {
    font-size: 20px;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 40px;
    max-width: 650px;
}

.hero-visual {
    flex: 1;
    min-width: 300px;
    position: relative;
    height: 450px;
    perspective: 1000px;
}

.dashboard {
    position: absolute;
    width: 90%;
    height: 85%;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 20px;
    backdrop-filter: blur(12px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.25);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.15);
    transform-style: preserve-3d;
    animation: float 8s ease-in-out infinite;
}

.dashboard-header {
    background: rgba(0, 0, 0, 0.1);
    padding: 18px 25px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.dashboard-title {
    font-size: 18px;
    font-weight: 600;
    color: white;
    letter-spacing: 0.5px;
}

.dashboard-content {
    padding: 25px;
    height: calc(100% - 60px);
    position: relative;
}

.exam-card {
    position: absolute;
    background: rgba(255, 255, 255, 0.92);
    border-radius: 12px;
    padding: 25px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
    width: 300px;
    transition: var(--transition);
    transform: translateZ(20px);
}

.exam-card:nth-child(1) {
    top: 10%;
    left: 5%;
    animation: float1 10s ease-in-out infinite;
}

.exam-card:nth-child(2) {
    top: 40%;
    right: 10%;
    animation: float2 12s ease-in-out infinite;
}

.exam-card:nth-child(3) {
    bottom: 15%;
    left: 20%;
    animation: float3 14s ease-in-out infinite;
}

.exam-card h4 {
    font-size: 20px;
    margin-bottom: 12px;
    color: var(--primary-dark-blue);
}

.exam-card p {
    font-size: 15px;
    color: var(--text-light);
    margin-bottom: 18px;
}

.exam-stats {
    display: flex;
    justify-content: space-between;
    font-size: 14px;
    color: var(--primary-blue);
    font-weight: 500;
}

.exam-stats span {
    display: flex;
    align-items: center;
}

.exam-stats i {
    margin-right: 6px;
}

/* 统计数据 */
.stats {
    padding: 80px 0;
    background-color: var(--white);
}

.stats-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    padding: 0 20px;
}

.stat-card {
    text-align: center;
    padding: 40px 20px;
    border-radius: 15px;
    background: var(--light-gray);
    transition: var(--transition);
}

.stat-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--card-shadow);
}

.stat-icon {
    width: 80px;
    height: 80px;
    background: var(--light-blue);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 32px;
    color: var(--primary-blue);
}

.stat-value {
    font-size: 42px;
    font-weight: 700;
    color: var(--primary-dark-blue);
    margin-bottom: 10px;
}

.stat-label {
    font-size: 18px;
    color: var(--text-light);
}

/* 核心功能 */
.features {
    padding: 100px 0;
    background-color: var(--light-gray);
    position: relative;
    overflow: hidden;
}

.features:before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 40%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-dark-blue) 100%);
    clip-path: polygon(0 0, 100% 0, 100% 100%, 30% 100%);
    opacity: 0.05;
    z-index: 0;
}

.section-title {
    text-align: center;
    margin-bottom: 80px;
    position: relative;
    z-index: 1;
}

.section-title h2 {
    font-size: 42px;
    margin-bottom: 20px;
    position: relative;
    display: inline-block;
}

.section-title h2:after {
    content: '';
    position: absolute;
    bottom: -20px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 5px;
    background: var(--primary-blue);
    border-radius: 5px;
}

.section-title p {
    max-width: 700px;
    margin: 40px auto 0;
    font-size: 20px;
    color: var(--text-light);
}

.features-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 40px;
    padding: 0 20px;
    position: relative;
    z-index: 1;
}

.feature-card {
    background: var(--white);
    border-radius: 20px;
    padding: 45px 35px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    box-shadow: var(--card-shadow);
    border: 1px solid rgba(227, 242, 253, 0.5);
}

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

.feature-card:before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 5px;
    height: 100%;
    background: var(--primary-blue);
}

.feature-icon {
    width: 80px;
    height: 80px;
    background: var(--light-blue);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 30px;
    font-size: 36px;
    color: var(--primary-blue);
    transition: var(--transition);
}

.feature-card:hover .feature-icon {
    transform: rotateY(180deg);
    background: var(--primary-blue);
    color: var(--white);
}

.feature-card h3 {
    font-size: 24px;
    margin-bottom: 20px;
    color: var(--text-dark);
}

.feature-card p {
    margin-bottom: 25px;
    font-size: 17px;
}

.feature-link {
    color: var(--primary-blue);
    text-decoration: none;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    transition: var(--transition);
}

.feature-link i {
    margin-left: 8px;
    transition: var(--transition);
}

.feature-link:hover {
    color: var(--primary-dark-blue);
}

.feature-link:hover i {
    transform: translateX(5px);
}

/* 解决方案 */
.solutions {
    padding: 120px 0;
    background-color: var(--white);
    position: relative;
}

.solutions:before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100" preserveAspectRatio="none"><circle cx="50" cy="50" r="40" stroke="rgba(30,136,229,0.03)" stroke-width="2" fill="none"/></svg>');
    background-size: 30px 30px;
    opacity: 0.5;
}

.solutions-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 40px;
    padding: 0 20px;
    position: relative;
    z-index: 1;
}

.solution-card {
    background: var(--white);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--card-shadow);
    transition: var(--transition);
    position: relative;
    border: 1px solid rgba(227, 242, 253, 0.5);
}

.solution-card:hover {
    transform: translateY(-15px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.solution-image {
    height: 220px;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-dark-blue) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 60px;
    position: relative;
    overflow: hidden;
}

.solution-image:before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100" preserveAspectRatio="none"><path d="M0,0 L100,0 L100,100 Q75,85 50,100 T0,85 Z" fill="rgba(255,255,255,0.1)"/></svg>');
    background-size: 100% auto;
    background-position: bottom;
    background-repeat: no-repeat;
}

.solution-content {
    padding: 35px;
}

.solution-content h3 {
    font-size: 24px;
    margin-bottom: 20px;
    color: var(--text-dark);
    position: relative;
    padding-bottom: 15px;
}

.solution-content h3:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 50px;
    height: 3px;
    background: var(--primary-blue);
}

.solution-content p {
    margin-bottom: 25px;
    font-size: 17px;
}

.solution-content ul {
    list-style: none;
    margin-top: 25px;
}

.solution-content li {
    padding: 12px 0;
    border-bottom: 1px dashed rgba(0, 0, 0, 0.1);
    display: flex;
    align-items: center;
    font-size: 16px;
}

.solution-content li:last-child {
    border-bottom: none;
}

.solution-content li i {
    color: var(--primary-blue);
    font-size: 18px;
    margin-right: 12px;
    min-width: 24px;
}

/* 技术优势 */
.tech {
    padding: 120px 0;
    background: linear-gradient(135deg, var(--primary-dark-blue) 0%, var(--primary-blue) 100%);
    color: white;
    position: relative;
    overflow: hidden;
}

.tech:before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100" preserveAspectRatio="none"><path d="M0,0 L100,0 L100,100 Q75,85 50,100 T0,85 Z" fill="rgba(255,255,255,0.05)"/></svg>');
    background-size: 100% auto;
    background-position: bottom;
    background-repeat: no-repeat;
}

.tech-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.tech-visual {
    flex: 1;
    min-width: 350px;
    height: 500px;
    display: flex;
    align-items: center;
    justify-content: center;
    perspective: 1000px;
}

.dashboard {
    position: relative;
    width: 100%;
    height: 450px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 20px;
    backdrop-filter: blur(12px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.25);
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.15);
    transform-style: preserve-3d;
    animation: float 8s ease-in-out infinite;
}

.dashboard-header {
    background: rgba(0, 0, 0, 0.1);
    padding: 18px 25px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.dashboard-title {
    font-size: 18px;
    font-weight: 600;
    color: white;
    letter-spacing: 0.5px;
}

.dashboard-content {
    padding: 25px;
    height: calc(100% - 60px);
    position: relative;
}

.monitor-item {
    position: absolute;
    background: rgba(255, 255, 255, 0.92);
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
    width: 280px;
    transform: translateZ(20px);
}

.monitor-item:nth-child(1) {
    top: 10%;
    left: 5%;
}

.monitor-item:nth-child(2) {
    top: 40%;
    right: 10%;
}

.monitor-item h4 {
    font-size: 18px;
    margin-bottom: 15px;
    color: var(--primary-dark-blue);
    display: flex;
    align-items: center;
}

.monitor-item h4 i {
    margin-right: 10px;
    color: var(--primary-blue);
}

.status {
    display: flex;
    justify-content: space-between;
    margin-top: 15px;
    font-size: 14px;
    color: var(--text-light);
}

.status-value {
    color: var(--success);
    font-weight: 500;
}

.tech-content {
    flex: 1;
    min-width: 350px;
}

.tech-content h2 {
    color: white;
    font-size: 42px;
    margin-bottom: 25px;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.tech-content p {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 40px;
    max-width: 600px;
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 30px;
}

.tech-item {
    display: flex;
    align-items: flex-start;
    gap: 15px;
}

.tech-icon {
    width: 60px;
    height: 60px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: var(--accent-blue);
    flex-shrink: 0;
    transition: var(--transition);
}

.tech-item:hover .tech-icon {
    transform: rotateY(180deg);
    background: var(--accent-blue);
    color: white;
}

.tech-text h4 {
    font-size: 20px;
    margin-bottom: 8px;
    color: white;
}

/* 客户评价 */
.testimonials {
    padding: 120px 0;
    background-color: var(--light-gray);
    position: relative;
}

.testimonials-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    position: relative;
    z-index: 1;
}

.testimonial-card {
    background: var(--white);
    border-radius: 20px;
    padding: 50px;
    box-shadow: var(--card-shadow);
    position: relative;
    margin-top: 60px;
    max-width: 1000px;
    margin-left: auto;
    margin-right: auto;
}

.testimonial-card:before {
    content: '"';
    position: absolute;
    top: -40px;
    left: 40px;
    font-size: 120px;
    color: var(--primary-blue);
    opacity: 0.1;
    font-family: serif;
    line-height: 1;
}

.testimonial-content {
    font-size: 20px;
    font-style: italic;
    margin-bottom: 40px;
    line-height: 1.8;
    color: var(--text-dark);
    position: relative;
    z-index: 1;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 25px;
}

.author-avatar {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: var(--primary-blue);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 36px;
    color: white;
    flex-shrink: 0;
}

.author-info h4 {
    font-size: 22px;
    margin-bottom: 5px;
}

.author-position {
    color: var(--primary-blue);
    font-weight: 500;
}

.clients {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 40px;
    margin-top: 60px;
}

.client-logo {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-dark);
    opacity: 0.7;
    transition: var(--transition);
}

.client-logo:hover {
    opacity: 1;
    color: var(--primary-blue);
    transform: translateY(-5px);
}

/* CTA区域 */
.cta-section {
    padding: 120px 0;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-dark-blue) 100%);
    text-align: center;
    color: white;
    position: relative;
    overflow: hidden;
}

.cta-section:before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100" preserveAspectRatio="none"><path d="M0,0 L100,0 L100,100 Q75,85 50,100 T0,85 Z" fill="rgba(255,255,255,0.1)"/></svg>');
    background-size: 100% auto;
    background-position: bottom;
    background-repeat: no-repeat;
}

.cta-content {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 20px;
    position: relative;
    z-index: 1;
}

.cta-content h2 {
    font-size: 42px;
    color: white;
    margin-bottom: 20px;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.cta-content p {
    font-size: 20px;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 40px;
}

.cta-buttons {
    display: flex;
    justify-content: center;
    gap: 25px;
    margin-top: 30px;
    flex-wrap: wrap;
}

/* 页脚 */
.footer {
    background: var(--text-dark);
    color: rgba(255, 255, 255, 0.7);
    padding: 100px 0 40px;
    position: relative;
}

.footer:before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100" preserveAspectRatio="none"><path d="M0,0 L100,0 L100,100 Q75,85 50,100 T0,85 Z" fill="rgba(255,255,255,0.05)"/></svg>');
    background-size: 100% auto;
    background-position: top;
    background-repeat: no-repeat;
    transform: rotate(180deg);
}

.footer-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 50px;
    position: relative;
    z-index: 1;
}

.footer-column h4 {
    color: white;
    margin-bottom: 30px;
    font-size: 22px;
    position: relative;
    padding-bottom: 15px;
}

.footer-column h4:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 50px;
    height: 4px;
    background: var(--primary-blue);
    border-radius: 4px;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 18px;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: var(--transition);
    display: block;
    font-size: 16px;
}

.footer-links a:hover {
    color: var(--accent-blue);
    padding-left: 8px;
}

.footer-contact li {
    display: flex;
    align-items: flex-start;
    gap: 15px;
    margin-bottom: 20px;
}

.footer-contact i {
    color: var(--accent-blue);
    font-size: 20px;
    margin-top: 4px;
}

.social-links {
    display: flex;
    gap: 15px;
    margin-top: 30px;
}

.social-link {
    width: 45px;
    height: 45px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 20px;
    transition: var(--transition);
}

.social-link:hover {
    background: var(--primary-blue);
    transform: translateY(-5px);
}

.copyright {
    text-align: center;
    padding-top: 60px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    margin-top: 60px;
    font-size: 16px;
    color: rgba(255, 255, 255, 0.5);
}

.copyright a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: var(--transition);
    font-size: 16px;
    cursor: pointer;
}

.copyright a:hover {
    color: var(--accent-blue);
    padding-left: 8px;
}

/* 返回顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 60px;
    height: 60px;
    background: var(--primary-blue);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    z-index: 99;
    opacity: 0;
    transform: translateY(100px);
    box-shadow: 0 8px 20px rgba(30, 136, 229, 0.4);
}

.back-to-top.visible {
    opacity: 1;
    transform: translateY(0);
}

.back-to-top:hover {
    background: var(--primary-dark-blue);
    transform: translateY(-5px);
}

/* 动画 */
@keyframes float {
    0% { transform: translate(-50%, -50%) rotate(0deg); }
    50% { transform: translate(-50%, -53%) rotate(2deg); }
    100% { transform: translate(-50%, -50%) rotate(0deg); }
}

@keyframes float1 {
    0% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(-2deg); }
    100% { transform: translateY(0px) rotate(0deg); }
}

@keyframes float2 {
    0% { transform: translateY(-10px) rotate(0deg); }
    50% { transform: translateY(10px) rotate(2deg); }
    100% { transform: translateY(-10px) rotate(0deg); }
}

@keyframes float3 {
    0% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(15px) rotate(-1deg); }
    100% { transform: translateY(0px) rotate(0deg); }
}

/* 滚动动效 */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s cubic-bezier(0.5, 0, 0, 1);
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* 响应式设计 */
@media (max-width: 1200px) {
    .hero h1 {
        font-size: 48px;
    }
    
    .tech-content h2 {
        font-size: 36px;
    }
}

@media (max-width: 992px) {
    .hero-container {
        flex-direction: column;
        text-align: center;
    }
    
    .hero-content {
        padding-right: 0;
        margin-bottom: 60px;
    }
    
    .hero-content .cta-buttons {
        justify-content: center;
    }
    
    .tech-container {
        flex-direction: column;
    }
    
    .footer-container {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .hero h1 {
        font-size: 40px;
    }
    
    .section-title h2 {
        font-size: 36px;
    }
    
    .features-container {
        grid-template-columns: 1fr;
    }
    
    .solutions-container {
        grid-template-columns: 1fr;
    }
    
    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .testimonial-content {
        font-size: 18px;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 32px;
    }
    
    .hero p {
        font-size: 18px;
    }
    
    .section-title h2 {
        font-size: 32px;
    }
    
    .stat-value {
        font-size: 36px;
    }
}