/* 重置样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* 基础样式 */
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: #374151;
    overflow-x: hidden;
}

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

.fa-arrow-up{display:none !important;}

/* 导航栏 */
.navbar {
	position:fixed;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    transition: all 0.3s ease;
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-logo h2 {
    color: #1e3a8a;
    font-weight: 700;
    font-size: 1.5rem;
}

.nav-logo h2 .logo{
	background: url(http://www.avtechcn.com/wp-content/themes/avtech/img/logo.png) no-repeat;
    background-size: 80px auto;
    font-size: 24px;
    padding: 4px 0 10px 92px;
    color: #111;
    font-weight: bold;
    float: left;
    width: auto;
}

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

.nav-link {
    text-decoration: none;
    color: #374151;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav-link:hover {
    color: #1e3a8a;
}

.nav-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -5px;
    left: 0;
    background-color: #f97316;
    transition: width 0.3s ease;
}

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

.lxwm{
	background: #6b63c3;
    color: #fff;
    padding: 2px 8px;
    border-radius: 4px;
    border: 2px solid rgba(255, 255, 255, 0.6);
    backdrop-filter: blur(10px);
}
.lxwm:hover{color:#fff;}
.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.bar {
    width: 25px;
    height: 3px;
    background-color: #374151;
    margin: 3px 0;
    transition: 0.3s;
}

/* 首屏区域 */
.hero {
    min-height: 100vh;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 1000"><polygon fill="rgba(255,255,255,0.1)" points="0,1000 1000,0 1000,1000"/></svg>');
    background-size: cover;
}

.hero-container {
    max-width: 1200px;
    margin: 80px auto;
    padding: 0 20px;
    position: relative;
    z-index: 2;
}

.hero-content {
    display: grid;
    grid-template-columns: 5fr 3fr;
    gap: 3rem;
    align-items: center;
	margin-top: 40px;
}

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    color: white;
    margin-bottom: 1rem;
    line-height:0.9;
}

.highlight {
    color: #fbbf24;
    background: linear-gradient(45deg, #fbbf24, #f97316);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    font-size: 2rem;
    font-weight: 400;
	position: relative;
    top: -6px;
}
.onlybuy{
	font-size: 18px;
    font-weight: normal;
    padding: 1px 6px;
    border-radius: 4px;
    background: #fff;
    color: #6969cc;
	margin: 10px auto 20px;
    display: inline-block;
}
.explain{font-size:1.5rem;font-weight: 400;white-space: nowrap;color: white; display: block;}
.fa-solid, .fas {
    font-size: 16px;
    padding-right: 6px;
}
.hero-description {
    font-size: 1rem;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 2rem;
    line-height: 1.8;
	padding: 10px 20px;
    border-radius: 10px;
    background: #9aa2ef;
    box-shadow: 2px 2px 8px #a3aced;
}
.hero-description b{color: #f5dda3;}
.hero-buttons {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.4rem;
}

.btn {
    padding: 1rem 2rem;
    border: none;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(45deg, #f97316, #ea580c);
    color: white;
    box-shadow: 0 4px 15px rgba(249, 115, 22, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(249, 115, 22, 0.6);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border: 2px solid rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
}

.hero-stats {
    display: flex;
    gap: 2rem;
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: #fbbf24;
}

.stat-label {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.8);
}

.hero-image {
    position: relative;
}

.hero-img {
    width: 100%;
    height: auto;
    border-radius: 10px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    transform: perspective(1000px) rotateY(-5deg);
    transition: transform 0.3s ease;
}

.hero-img:hover {
    transform: perspective(1000px) rotateY(0deg);
}


/* 通用区域样式 */
.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: #1e3a8a;
    margin-bottom: 1rem;
}

.section-subtitle {
    font-size: 1.5rem;
    color: #6b7280;
    max-width: 600px;
    margin: 0 auto;
}

/* 产品概述 */
.overview {
    padding: 6rem 0;
    background: #f8fafc;
}

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

.overview-card {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.overview-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.card-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(45deg, #1e3a8a, #3b82f6);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    color: white;
    font-size: 1.5rem;
}

.overview-card h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: #1e3a8a;
    margin-bottom: 1rem;
}

.overview-card p {
    color: #6b7280;
    line-height: 1.6;
}

/* 解决问题 */
.problems {
    padding: 6rem 0;
    background: white;
}

.problems-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.problem-card {
    background: #fef2f2;
    padding: 2rem;
    border-radius: 15px;
    border-left: 5px solid #ef4444;
    transition: all 0.3s ease;
}

.problem-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(239, 68, 68, 0.1);
}

.problem-icon {
    width: 50px;
    height: 50px;
    background: #ef4444;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    color: white;
    font-size: 1.2rem;
}

.problem-card h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: #dc2626;
    margin-bottom: 1rem;
}

.problem-card ul {
    list-style: none;
    padding-left: 0;
}

.problem-card li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
    color: #6b7280;
}

.problem-card li::before {
    content: '✗';
    position: absolute;
    left: 0;
    color: #ef4444;
    font-weight: bold;
}

/* 产品价值 */
.value,.faqa {
    padding: 6rem 0;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
}

.value-list {
    margin: 0 auto;
}

.value-item {
    display: flex;
    gap: 2rem;
    margin-bottom: 4rem;
    align-items: flex-start;
}

.value-number {
    width: 60px;
    height: 60px;
    background: linear-gradient(45deg, #f97316, #ea580c);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
    font-weight: 700;
    flex-shrink: 0;
}

.value-content {
    flex: 1;
}

.value-content h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: #1e3a8a;
}
.h3-subtitle{
	font-size: 1.1rem;
    color: #1e3a8a;
    text-shadow: 1px 1px #eee;
}
.value-content p {
    color: #6b7280;
    line-height: 1.8;
	text-align:left;
	margin: 10px auto;
}
.value-content p font{
	font-size:1rem;
	line-height:normal;
	color:#999;
	font-family: fangsong;
}
.value-content p strong{
	color:#ea580c;
}
.value-image {
    margin: 1.5rem;
}

.value-image img {
    width: 70%;
    height: auto;
}
.cost-add{
	margin: 1.5rem 0;
}
.cost-comparison {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 1rem;
    align-items: center;
    margin: 1.5rem auto;
	max-height: 200px;
}

.comparison-item {
    padding: 1rem;
    border-radius: 8px;
    text-align: center;
	min-height: 12rem;
}

.cost-comparison img{
	width: 150px;
    position: relative;
    top: -100px;
    right: -180%;
    transform: skew(20deg, -20deg);
    opacity: 0.7;
}

.traditional {
    background: #fef2f2;
    border: 1px solid #fecaca;
}

.modern {
    background: #f0fdf4;
    border: 1px solid #bbf7d0;
}

.comparison-item h4 {
    font-weight: 600;
    margin-bottom: 0.5rem;
	font-size:1.3rem;
}

.traditional h4 {
    color: #dc2626;
}

.modern h4 {
    color: #16a34a;
}

.comparison-arrow {
    color: #f97316;
    font-size: 1.5rem;
}



.value-content table {
            width: 100%;
			font-size:0.9rem;
            border-collapse: collapse;
            font-family: Arial, sans-serif;
        }
.value-content th, .value-content td {
            border: 1px solid #ddd;
            padding: 4px 6px;
            text-align: left;
        }
.value-content th {
            background-color: #f5f5f5;
            font-weight: bold;
            color: #333;
        }
.value-content th:nth-of-type(1){width:15%;}	
.value-content th:nth-of-type(2){width:10%;}		
.value-content th:nth-of-type(3){width:20%;}
.value-content th:nth-of-type(4){width:10%;}
.value-content th:nth-of-type(5){width:20%;}
.value-content th:nth-of-type(6){width:25%;}	
	
.value-content tr:nth-child(even) {
            background-color: #f9f9f9;
        }
.value-content tr:hover {
            background-color: #f1f1f1;
        }

/* 课程体系 */
.courses {
    padding: 6rem 0;
    background: white;
}

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

.course-card {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    border: 2px solid transparent;
    transition: all 0.3s ease;
}

.course-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    border-color: #f97316;
}

.course-card.special {
    background: linear-gradient(135deg, #fbbf24, #f97316);
    color: white;
}

.course-card.special .course-icon {
    background: rgba(255, 255, 255, 0.2);
    color: white;
}

.course-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(45deg, #1e3a8a, #3b82f6);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    color: white;
    font-size: 1.5rem;
}

.course-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: #1e3a8a;
    margin-bottom: 1rem;
}

.course-card.special h3 {
    color: white;
}

.course-card p {
    color: #232323;
    line-height: 1.6;
	font-size: 16px;
	text-align:left;
	font-weight: bold;
}
.course-card p.title{
	white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.course-card p.intro {
    color: #6b7280;
	font-size: 14px;
	margin-top: 10px;
	font-weight: normal;
}
.intromore{
	display: inline-block;
    font-size: 14px;    
    color: white;
    padding: 6px 10px;
    border-radius: 6px;
    margin: 30px 10px 0;
	border: 2px solid rgba(255, 255, 255, 0.6);	
}
.intromore:nth-of-type(2){
	background: linear-gradient(45deg, #f97316, #ea580c);
    box-shadow: 0 4px 15px rgba(249, 115, 22, 0.4);
}
.intromore:nth-of-type(3){
	background: rgb(6 50 133 / 60%);
    border: 2px solid rgba(255, 255, 255, 0.6);
    backdrop-filter: blur(10px);
}
.intromore a{
	color:#fff;
	text-decoration:none;
}
.course-card.special p {
    color: rgba(255, 255, 255, 0.9);
}

/* 联系我们 */
.contact {
    padding: 6rem 0;
    background: linear-gradient(135deg, #1e3a8a 0%, #3b82f6 100%);
    color: white;
}

.contact .section-title,
.contact .section-subtitle {
    color: white;
}

.contactcenter{
	justify-content: center;
}



/* 页脚 */
.footer {
    background: #1f2937;
    color: white;
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 3rem;
    margin-bottom: 2rem;
}

.footer-logo h3 {
    color: #fbbf24;
    margin-bottom: 1rem;
}

.footer-logo p {
    color: #9ca3af;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
}

.footer-section h4 {
    color: #fbbf24;
    margin-bottom: 1rem;
    font-weight: 600;
}

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

.footer-section li {
    margin-bottom: 0.5rem;
}

.footer-section a {
    color: #9ca3af;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: white;
}

.footer-bottom {
    border-top: 1px solid #374151;
    padding-top: 1rem;
    text-align: center;
    color: #9ca3af;
}
.faq .question{
	font-size: 20px;
    color: #0c1ea9;
    font-weight: bold;
}
.faq{
	width: 80%;
    margin: auto;
}
ul.faq li{
	list-style: none;
	width:100%;
	margin-bottom:20px;
}
/* 响应式设计 */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: white;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: 2rem 0;
    }
    
    .nav-menu.active {
        left: 0;
    }
    .hero{min-height: unset;}
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }
    .hero-content .hero-image{display:none;}
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-buttons {
        justify-content: center;
        flex-wrap: wrap;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .overview-grid,
    .problems-grid,
    .courses-grid {
        grid-template-columns: 1fr;
    }
    
    .value-item {
        flex-direction: column;
        text-align: center;
		gap: 0.4rem;
    }
    .h3-subtitle  { font-size: 1rem;text-align: left;  display: block; margin-top: 20px;}
    .cost-comparison {
        grid-template-columns: 1fr 0.1fr 1fr;
        gap: 0.1rem;
    }
    
    .comparison-arrow {
        transform: rotate(90deg);
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
	.problems{padding: 3rem 0;}
	
	.subtitle{font-size:1rem;}
	.onlybuy{display: inline-block;font-size: 14px; border: 0;font-family: kaiti;width: 90%;line-height: normal;text-align: left;}
	.explain{white-space:normal;font-size:1rem;text-align: left;display: block;margin: 20px auto 0px;line-height: 26px;width: 90%;}
	.hero-description{white-space:normal;text-align: left;font-size: 0.8rem;width: 90%;margin: 0 auto 30px;}
	.stat-number{font-size:1.4rem;}
	.section-header {margin-bottom: 2rem;}
	.value {padding: 3rem 0;}
	.value-content{position: relative; top: -40px;}
	.value-content h3{font-size: 1.1rem;text-align: left; padding-left: 50px;}
	.value-content p,.cost-add,.value-content p font{font-size: 0.9rem; text-align: left;line-height: normal;margin: 16px 0; display: block;}
	.value-item{margin-bottom: 0rem;}
	.value-image img{width:100%;}
	.value-number{width: 40px; height: 40px;font-size: 1.3rem;}
	.course-card {width:86%;border: 2px solid #f9ac49;}
	.course-card h3{font-size:1.2rem;}
	.faq .question {font-size: 18px;}
	.comparison-item {min-height: 20rem;}
	.comparison-item h4{font-size: 1rem;}
	.cost-comparison{max-height:330px;}
	.cost-comparison img{width: 100px;position: relative;right: -160%;top: -80px;}
	.problem-card li{padding: 0.2rem 0 0.2rem 1rem;}
	.problem-icon{display:none;}
	.courses{padding: 4rem 0;}
	.course-icon{margin:0;width:40px;height:40px;}
	.course-card {padding:1rem;}
	.intromore{margin: 20px 10px 0;}
	.value-image{margin:0;}
	.value-content table{font-size:0.7rem;}
	.value-content th:nth-of-type(1){width:15%;}	
.value-content th:nth-of-type(2){width:10%;}		
.value-content th:nth-of-type(3){width:15%;}
.value-content th:nth-of-type(4){width:15%;}
.value-content th:nth-of-type(5){width:20%;}
.value-content th:nth-of-type(6){width:25%;}	
.fa-arrow-right{display:none !important;}
.fa-arrow-up{display:unset !important;}
}




@media (max-width: 480px) {
    .container {
        padding: 0 15px;
		font-size: 0.9rem;
		line-height: normal;
        color: #726d6d;
		overflow:hidden;
    }
    
    .section-subtitle{font-size: 1.1rem;}
    .section-title {
        font-size: 1.5rem;
    }
    
    .btn {
        padding: 0.8rem 1.5rem;
        font-size: 0.9rem;
    }
	.problem-card h3{font-size: 1.1rem;}
	.problem-card{font-size: 0.9rem;line-height: normal;width: 90%; margin: auto;}
}

/* 滚动动画 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

/* 平滑滚动 */
html {
    scroll-behavior: smooth;
}