/* ========================================
   安徽网谷智能技术有限公司 - 企业官网样式
   设计风格：科技感、大气、现代
   主色调：深蓝 + 科技蓝 + 白色
   ======================================== */

/* 基础重置 */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #0066cc;
    --primary-dark: #004d99;
    --primary-light: #3385ff;
    --secondary: #00a8e8;
    --accent: #00d4aa;
    --dark: #0a1628;
    --dark-light: #1a2a4a;
    --text: #333333;
    --text-light: #666666;
    --text-lighter: #999999;
    --white: #ffffff;
    --gray: #f5f7fa;
    --gray-dark: #e8ecf1;
    --border: #e0e6ed;
    --gradient-primary: linear-gradient(135deg, #0066cc 0%, #00a8e8 100%);
    --gradient-dark: linear-gradient(135deg, #0a1628 0%, #1a2a4a 100%);
    --shadow-sm: 0 2px 10px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 20px rgba(0,0,0,0.12);
    --shadow-lg: 0 10px 40px rgba(0,0,0,0.15);
    --shadow-glow: 0 0 30px rgba(0,102,204,0.3);
    --transition: all 0.3s ease;
    --transition-slow: all 0.5s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
    background: var(--white);
}

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

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(0,0,0,0.05);
    transition: var(--transition);
}

.navbar.scrolled {
    box-shadow: var(--shadow-sm);
}

.nav-wrapper {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
}

.logo img {
    height: 45px;
    width: auto;
}

.logo-text {
    font-size: 22px;
    font-weight: 700;
    color: var(--primary);
    letter-spacing: 1px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 40px;
}

.nav-menu a {
    text-decoration: none;
    color: var(--text);
    font-size: 15px;
    font-weight: 500;
    position: relative;
    padding: 8px 0;
    transition: var(--transition);
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: var(--transition);
}

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--primary);
}

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

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

.hotline {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--primary);
    font-weight: 600;
}

.hotline i {
    font-size: 16px;
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 5px;
}

.hamburger span {
    display: block;
    width: 25px;
    height: 2px;
    background: var(--text);
    transition: var(--transition);
}

/* Hero Section */
.hero {
    position: relative;
    height: 100vh;
    min-height: 700px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: var(--dark);
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(ellipse at 20% 50%, rgba(0,102,204,0.15) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 50%, rgba(0,168,232,0.1) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 100%, rgba(0,212,170,0.08) 0%, transparent 50%);
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        linear-gradient(135deg, rgba(10,22,40,0.95) 0%, rgba(26,42,74,0.9) 50%, rgba(10,22,40,0.95) 100%);
}

.hero-particles {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;
}

.hero-particles::before {
    content: '';
    position: absolute;
    width: 200%;
    height: 200%;
    top: -50%;
    left: -50%;
    background-image: 
        radial-gradient(circle at 20% 30%, rgba(0,102,204,0.03) 0%, transparent 2%),
        radial-gradient(circle at 60% 20%, rgba(0,168,232,0.03) 0%, transparent 2%),
        radial-gradient(circle at 80% 60%, rgba(0,212,170,0.03) 0%, transparent 2%),
        radial-gradient(circle at 40% 70%, rgba(0,102,204,0.03) 0%, transparent 2%),
        radial-gradient(circle at 10% 80%, rgba(0,168,232,0.03) 0%, transparent 2%);
    animation: particleFloat 20s linear infinite;
}

@keyframes particleFloat {
    0% { transform: translate(0, 0); }
    100% { transform: translate(-50px, -50px); }
}

.hero-content {
    position: relative;
    z-index: 10;
    text-align: center;
    color: var(--white);
    max-width: 900px;
    padding: 0 20px;
}

.hero-title {
    font-size: 56px;
    font-weight: 900;
    margin-bottom: 20px;
    line-height: 1.2;
    letter-spacing: 2px;
}

.hero-title .highlight {
    background: linear-gradient(135deg, #00d4aa 0%, #00a8e8 50%, #0066cc 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 22px;
    font-weight: 300;
    margin-bottom: 20px;
    color: rgba(255,255,255,0.8);
    letter-spacing: 3px;
}

.hero-desc {
    font-size: 16px;
    color: rgba(255,255,255,0.6);
    margin-bottom: 40px;
    line-height: 1.8;
}

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

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 36px;
    border-radius: 50px;
    font-size: 15px;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
    border: none;
    outline: none;
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--white);
    box-shadow: 0 4px 20px rgba(0,102,204,0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(0,102,204,0.5);
}

.btn-secondary {
    background: transparent;
    color: var(--white);
    border: 2px solid rgba(255,255,255,0.3);
}

.btn-secondary:hover {
    background: rgba(255,255,255,0.1);
    border-color: rgba(255,255,255,0.5);
}

.btn-full {
    width: 100%;
    justify-content: center;
}

.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10;
}

.mouse {
    width: 26px;
    height: 40px;
    border: 2px solid rgba(255,255,255,0.4);
    border-radius: 13px;
    position: relative;
}

.mouse::before {
    content: '';
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 8px;
    background: rgba(255,255,255,0.6);
    border-radius: 2px;
    animation: scrollWheel 2s ease infinite;
}

@keyframes scrollWheel {
    0% { top: 8px; opacity: 1; }
    100% { top: 20px; opacity: 0; }
}

/* 数据统计 */
.stats {
    padding: 80px 0;
    background: var(--white);
    border-bottom: 1px solid var(--border);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
}

.stat-item {
    text-align: center;
    padding: 30px;
    position: relative;
}

.stat-item:not(:last-child)::after {
    content: '';
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 1px;
    height: 60px;
    background: var(--border);
}

.stat-number {
    font-size: 48px;
    font-weight: 900;
    color: var(--primary);
    line-height: 1;
    margin-bottom: 10px;
}

.stat-label {
    font-size: 15px;
    color: var(--text-light);
    font-weight: 500;
}

/* 通用区块标题 */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header.left {
    text-align: left;
}

.section-tag {
    display: inline-block;
    font-size: 13px;
    font-weight: 600;
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: 3px;
    margin-bottom: 12px;
    padding: 6px 16px;
    background: rgba(0,102,204,0.08);
    border-radius: 20px;
}

.section-title {
    font-size: 36px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 16px;
    line-height: 1.3;
}

.section-desc {
    font-size: 16px;
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto;
}

/* 解决方案 */
.solutions {
    padding: 100px 0;
    background: var(--gray);
}

.solutions-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.solution-card {
    background: var(--white);
    border-radius: 16px;
    padding: 40px 30px;
    text-align: center;
    transition: var(--transition);
    border: 1px solid var(--border);
    position: relative;
    overflow: hidden;
}

.solution-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: var(--transition);
}

.solution-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}

.solution-card:hover::before {
    transform: scaleX(1);
}

.solution-icon {
    width: 70px;
    height: 70px;
    background: var(--gradient-primary);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
    font-size: 28px;
    color: var(--white);
    transition: var(--transition);
}

.solution-card:hover .solution-icon {
    transform: scale(1.1);
    box-shadow: var(--shadow-glow);
}

.solution-card h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 12px;
}

.solution-card p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.7;
    margin-bottom: 20px;
}

.solution-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--primary);
    text-decoration: none;
    font-size: 14px;
    font-weight: 600;
    transition: var(--transition);
}

.solution-link:hover {
    gap: 10px;
}

/* 产品平台 */
.products {
    padding: 100px 0;
    background: var(--white);
}

.products-wrapper {
    display: flex;
    flex-direction: column;
    gap: 80px;
}

.product-item {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.product-item.reverse {
    direction: rtl;
}

.product-item.reverse > * {
    direction: ltr;
}

.product-image {
    display: flex;
    align-items: center;
    justify-content: center;
}

.product-icon-large {
    width: 300px;
    height: 300px;
    background: var(--gradient-primary);
    border-radius: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 100px;
    color: var(--white);
    position: relative;
    box-shadow: var(--shadow-lg);
}

.product-icon-large::before {
    content: '';
    position: absolute;
    top: -20px;
    left: -20px;
    right: 20px;
    bottom: 20px;
    border: 2px solid var(--primary);
    border-radius: 30px;
    opacity: 0.3;
    z-index: -1;
}

.product-content h3 {
    font-size: 28px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 20px;
}

.product-content p {
    font-size: 16px;
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 24px;
}

.product-features {
    list-style: none;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.product-features li {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 15px;
    color: var(--text);
}

.product-features li i {
    color: var(--accent);
    font-size: 14px;
}

/* 关于我们 */
.about {
    padding: 100px 0;
    background: var(--gradient-dark);
    color: var(--white);
}

.about-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.about .section-tag {
    background: rgba(255,255,255,0.1);
    color: var(--secondary);
}

.about .section-title {
    color: var(--white);
}

.about-text {
    font-size: 16px;
    line-height: 1.8;
    color: rgba(255,255,255,0.7);
    margin-bottom: 20px;
}

.about-features {
    display: flex;
    gap: 30px;
    margin: 30px 0;
}

.about-feature {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 20px;
    background: rgba(255,255,255,0.05);
    border-radius: 10px;
    border: 1px solid rgba(255,255,255,0.1);
}

.about-feature i {
    color: var(--accent);
    font-size: 18px;
}

.about-feature span {
    font-size: 14px;
    font-weight: 500;
}

.about-buttons {
    margin-top: 30px;
}

.about-image-wrapper {
    position: relative;
}

.about-img-placeholder {
    width: 100%;
    aspect-ratio: 4/3;
    background: rgba(255,255,255,0.05);
    border-radius: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    border: 2px dashed rgba(255,255,255,0.2);
    gap: 16px;
}

.about-img-placeholder i {
    font-size: 60px;
    color: rgba(255,255,255,0.3);
}

.about-img-placeholder span {
    font-size: 16px;
    color: rgba(255,255,255,0.5);
}

/* 荣誉资质 */
.honors {
    padding: 100px 0;
    background: var(--gray);
}

.honors-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.honor-card {
    background: var(--white);
    border-radius: 16px;
    padding: 40px 30px;
    text-align: center;
    transition: var(--transition);
    border: 1px solid var(--border);
}

.honor-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.honor-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 24px;
    color: var(--white);
}

.honor-card h4 {
    font-size: 18px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 8px;
}

.honor-card p {
    font-size: 13px;
    color: var(--text-lighter);
}

/* 合作单位 */
.partners {
    padding: 80px 0;
    background: var(--white);
}

.partners-slider {
    display: flex;
    justify-content: center;
    gap: 40px;
    flex-wrap: wrap;
}

.partner-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 20px 40px;
    background: var(--gray);
    border-radius: 12px;
    font-size: 18px;
    font-weight: 600;
    color: var(--text-light);
    transition: var(--transition);
    border: 1px solid var(--border);
}

.partner-logo:hover {
    background: var(--white);
    box-shadow: var(--shadow-md);
    transform: translateY(-3px);
}

.partner-logo i {
    color: var(--primary);
}

/* 联系我们 */
.contact {
    padding: 100px 0;
    background: var(--gray);
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

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

.contact-icon {
    width: 50px;
    height: 50px;
    min-width: 50px;
    background: var(--gradient-primary);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    color: var(--white);
}

.contact-detail h4 {
    font-size: 18px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 6px;
}

.contact-detail p {
    font-size: 15px;
    color: var(--text-light);
    line-height: 1.6;
}

.contact-form-wrapper {
    background: var(--white);
    border-radius: 20px;
    padding: 40px;
    box-shadow: var(--shadow-md);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 14px 18px;
    border: 1px solid var(--border);
    border-radius: 10px;
    font-size: 15px;
    font-family: inherit;
    color: var(--text);
    background: var(--white);
    transition: var(--transition);
    outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(0,102,204,0.1);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-lighter);
}

.form-group select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23666' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 15px center;
    padding-right: 40px;
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

/* 页脚 */
.footer {
    background: var(--dark);
    color: var(--white);
    padding: 80px 0 0;
}

.footer-wrapper {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 60px;
    margin-bottom: 60px;
}

.footer-logo {
    height: 45px;
    margin-bottom: 20px;
}

.footer-desc {
    font-size: 14px;
    line-height: 1.8;
    color: rgba(255,255,255,0.6);
    margin-bottom: 24px;
}

.footer-social {
    display: flex;
    gap: 16px;
}

.footer-social a {
    width: 40px;
    height: 40px;
    background: rgba(255,255,255,0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    text-decoration: none;
    transition: var(--transition);
}

.footer-social a:hover {
    background: var(--primary);
    transform: translateY(-3px);
}

.footer-links h4 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 24px;
    color: var(--white);
}

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

.footer-links li {
    margin-bottom: 12px;
}

.footer-links a {
    color: rgba(255,255,255,0.6);
    text-decoration: none;
    font-size: 14px;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--secondary);
    padding-left: 5px;
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding: 24px 0;
    text-align: center;
}

.footer-bottom p {
    font-size: 13px;
    color: rgba(255,255,255,0.4);
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .solutions-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .stat-item:nth-child(2)::after {
        display: none;
    }
    
    .product-item {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .product-item.reverse {
        direction: ltr;
    }
    
    .about-wrapper {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .contact-wrapper {
        grid-template-columns: 1fr;
    }
    
    .footer-wrapper {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 80px;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: 20px;
        gap: 0;
        box-shadow: var(--shadow-md);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-menu li {
        border-bottom: 1px solid var(--border);
    }
    
    .nav-menu a {
        display: block;
        padding: 15px 0;
    }
    
    .nav-contact {
        display: none;
    }
    
    .hamburger {
        display: flex;
    }
    
    .hamburger.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .hamburger.active span:nth-child(2) {
        opacity: 0;
    }
    
    .hamburger.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }
    
    .hero-title {
        font-size: 36px;
    }
    
    .hero-subtitle {
        font-size: 16px;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .solutions-grid {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: 1fr 1fr;
        gap: 20px;
    }
    
    .stat-item::after {
        display: none;
    }
    
    .honors-grid {
        grid-template-columns: 1fr;
    }
    
    .product-icon-large {
        width: 200px;
        height: 200px;
        font-size: 60px;
    }
    
    .product-features {
        grid-template-columns: 1fr;
    }
    
    .about-features {
        flex-direction: column;
        gap: 15px;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .footer-wrapper {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .section-title {
        font-size: 28px;
    }
}

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

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

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

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

/* 滚动显示动画 */
[data-aos] {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-aos].aos-animate {
    opacity: 1;
    transform: translateY(0);
}

/* 自定义滚动条 */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--gray);
}

::-webkit-scrollbar-thumb {
    background: var(--primary);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-dark);
}