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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Microsoft YaHei', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    overflow-x: hidden;
}

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

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 12px 30px;
    border: none;
    border-radius: 6px;
    text-decoration: none;
    font-size: 16px;
    font-weight: 500;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    white-space: nowrap;
}

.btn-primary {
    background: linear-gradient(135deg, #e53e3e 0%, #c53030 100%);
    color: white;
    position: relative;
    overflow: hidden;
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.btn-primary:hover::before {
    left: 100%;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(229, 62, 62, 0.4);
}

.btn-secondary {
    background: transparent;
    color: #e53e3e;
    border: 2px solid #e53e3e;
}

.btn-secondary:hover {
    background: #e53e3e;
    color: white;
}

.btn-full {
    width: 100%;
}

/* Logo样式 */
.logo {
    height: 40px;
    width: auto;
}

/* CSS Logo设计 */
.logo-design {
    display: flex;
    align-items: center;
    gap: 2px;
    height: 40px;
}

.logo-square {
    width: 20px;
    height: 20px;
    background: #e53e3e;
    border-radius: 3px;
    position: relative;
}

.logo-square::after {
    content: '';
    position: absolute;
    top: 8px;
    left: 8px;
    width: 12px;
    height: 4px;
    background: #e53e3e;
    border-radius: 1px;
}

.logo-bracket {
    width: 16px;
    height: 32px;
    border: 3px solid #e53e3e;
    border-left: none;
    border-radius: 0 6px 6px 0;
    position: relative;
}

.logo-bracket::before {
    content: '';
    position: absolute;
    top: 50%;
    left: -3px;
    transform: translateY(-50%);
    width: 6px;
    height: 6px;
    background: #e53e3e;
    border-radius: 50%;
}

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    padding: 0;
    box-shadow: 0 2px 20px 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 {
    display: flex;
    align-items: center;
    gap: 10px;
}

.company-name {
    font-size: 24px;
    font-weight: 700;
    color: #e53e3e;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav-link {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav-link:hover {
    color: #e53e3e;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: #e53e3e;
    transition: width 0.3s ease;
}

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

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.bar {
    width: 25px;
    height: 3px;
    background: #333;
    margin: 3px 0;
    transition: 0.3s;
}

/* 英雄区域 */
.hero {
    padding: 120px 0 80px;
    background: url('assets/bg.jpeg') center/cover no-repeat;
    background-attachment: fixed;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

/* 背景蒙版效果 */
.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        135deg,
        rgba(229, 62, 62, 0.85) 0%,
        rgba(197, 48, 48, 0.75) 25%,
        rgba(0, 0, 0, 0.6) 50%,
        rgba(0, 0, 0, 0.4) 75%,
        rgba(0, 0, 0, 0.3) 100%
    );
    z-index: 1;
}

/* 动态背景效果 */
.hero::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(
        ellipse at center,
        rgba(255, 255, 255, 0.1) 0%,
        transparent 70%
    );
    z-index: 2;
    animation: pulse 4s ease-in-out infinite;
}

/* 脉冲动画 */
@keyframes pulse {
    0%, 100% {
        opacity: 0.8;
    }
    50% {
        opacity: 1;
    }
}

.hero-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 3;
}

.hero-title {
    font-size: 48px;
    font-weight: 700;
    color: #ffffff;
    margin-bottom: 20px;
    line-height: 1.2;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
    animation: fadeInUp 1s ease-out 0.3s both;
}

.hero-subtitle {
    font-size: 18px;
    color: #f0f0f0;
    margin-bottom: 30px;
    line-height: 1.6;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
    animation: fadeInUp 1s ease-out 0.6s both;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
    animation: fadeInUp 1s ease-out 0.9s both;
}

.hero-image {
    position: relative;
    animation: fadeInRight 1s ease-out 0.6s both;
}

/* 英雄区域图片 */
.hero-img {
    width: 100%;
    height: auto;
    border-radius: 15px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    object-fit: cover;
    max-height: 400px;
}

.hero-stats {
    max-width: 1200px;
    margin: 60px auto 0;
    padding: 0 20px;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    position: relative;
    z-index: 3;
}

.stat-item {
    text-align: center;
    padding: 20px;
    background: rgba(255, 255, 255, 0.95);
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.stat-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.3);
}

.stat-number {
    font-size: 36px;
    font-weight: 700;
    color: #e53e3e;
    margin-bottom: 5px;
}

.stat-label {
    font-size: 16px;
    color: #666;
}

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

.section-title {
    font-size: 36px;
    font-weight: 700;
    color: #333;
    margin-bottom: 15px;
}

.section-subtitle {
    font-size: 18px;
    color: #666;
    max-width: 600px;
    margin: 0 auto;
}

/* 产品服务 */
.products {
    padding: 100px 0;
    background: white;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.product-card {
    background: white;
    padding: 40px 30px;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid #f0f0f0;
}

.product-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.product-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, #e53e3e 0%, #c53030 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 30px;
}

.product-title {
    font-size: 22px;
    font-weight: 600;
    color: #333;
    margin-bottom: 15px;
}

.product-desc {
    color: #666;
    margin-bottom: 20px;
    line-height: 1.6;
}

.product-features {
    list-style: none;
    text-align: left;
}

.product-features li {
    padding: 8px 0;
    color: #555;
    position: relative;
    padding-left: 20px;
}

.product-features li::before {
    content: '•';
    color: #e53e3e;
    position: absolute;
    left: 0;
    font-weight: bold;
}

/* 解决方案 */
.solutions {
    padding: 100px 0;
    background: #f8f9fa;
}

.solutions-tabs {
    max-width: 1200px;
    margin: 0 auto;
}

.tab-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 50px;
    flex-wrap: wrap;
}

.tab-btn {
    padding: 12px 30px;
    border: 2px solid #ddd;
    background: white;
    color: #666;
    border-radius: 30px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 16px;
    font-weight: 500;
}

.tab-btn.active,
.tab-btn:hover {
    border-color: #e53e3e;
    background: #e53e3e;
    color: white;
}

.tab-content {
    background: white;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    overflow: hidden;
}

.tab-panel {
    display: none;
    padding: 50px;
}

.tab-panel.active {
    display: block;
}

.solution-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

.solution-content h3 {
    font-size: 28px;
    color: #333;
    margin-bottom: 20px;
}

.solution-content p {
    color: #666;
    margin-bottom: 30px;
    line-height: 1.6;
}

.solution-features {
    list-style: none;
    margin-bottom: 30px;
}

.solution-features li {
    padding: 10px 0;
    display: flex;
    align-items: center;
    gap: 10px;
}

.solution-features i {
    color: #e53e3e;
}

/* 解决方案图片 */
.solution-img {
    width: 100%;
    height: auto;
    border-radius: 10px;
    object-fit: cover;
    max-height: 300px;
}

/* 关于我们 */
.about {
    padding: 100px 0;
    background: white;
}

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

.about-desc {
    color: #666;
    margin-bottom: 40px;
    line-height: 1.8;
    font-size: 16px;
}

.about-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
}

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

.feature-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #e53e3e 0%, #c53030 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 20px;
    flex-shrink: 0;
}

.feature-text h4 {
    font-size: 18px;
    color: #333;
    margin-bottom: 5px;
}

.feature-text p {
    color: #666;
    font-size: 14px;
}

/* 关于我们图片 */
.about-img {
    width: 100%;
    height: auto;
    border-radius: 15px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    object-fit: cover;
    max-height: 400px;
}

/* 联系我们 */
.contact {
    padding: 100px 0;
    background: #f8f9fa;
}

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

.contact-info {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
}

.contact-card {
    background: white;
    padding: 30px 20px;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.contact-card:hover {
    transform: translateY(-5px);
}

.contact-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, #e53e3e 0%, #c53030 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 24px;
}

.contact-card h4 {
    font-size: 18px;
    color: #333;
    margin-bottom: 10px;
}

.contact-card p {
    color: #666;
    font-size: 14px;
    line-height: 1.5;
}

.contact-form {
    background: white;
    padding: 40px;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.contact-form h3 {
    font-size: 24px;
    color: #333;
    margin-bottom: 30px;
    text-align: center;
}

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

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

.form-input {
    width: 100%;
    padding: 15px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 16px;
    transition: border-color 0.3s ease;
    font-family: inherit;
}

.form-input:focus {
    outline: none;
    border-color: #e53e3e;
}

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

/* 页脚 */
.footer {
    background: #2c3e50;
    color: white;
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 3fr;
    gap: 60px;
    margin-bottom: 40px;
}

.footer-logo .logo {
    height: 40px;
    width: auto;
    margin-bottom: 15px;
    display: block;
}

.footer-desc {
    color: #bdc3c7;
    line-height: 1.6;
}

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

.footer-column h4 {
    font-size: 18px;
    margin-bottom: 20px;
    color: white;
}

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

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

.footer-column a {
    color: #bdc3c7;
    text-decoration: none;
    transition: color 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

.footer-column a:hover {
    color: #e53e3e;
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid #34495e;
    color: #bdc3c7;
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .hero-content,
    .solution-content,
    .about-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .hero-stats {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .products-grid {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    }
    
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .contact-info {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .footer-links {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .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: 20px 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .hamburger {
        display: flex;
    }

    .hamburger.active .bar:nth-child(2) {
        opacity: 0;
    }

    .hamburger.active .bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }

    .hamburger.active .bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }

    .hero-title {
        font-size: 36px;
    }

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

    .section-title {
        font-size: 28px;
    }

    .tab-buttons {
        flex-direction: column;
        align-items: center;
    }

    .tab-panel {
        padding: 30px 20px;
    }

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

    .contact-info {
        grid-template-columns: 1fr;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .footer-links {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-buttons {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .hero-title {
        font-size: 28px;
    }
    
    .hero-subtitle {
        font-size: 16px;
    }
    
    .section-title {
        font-size: 24px;
    }
    
    .product-card,
    .contact-form {
        padding: 25px 20px;
    }
    
    .hero-stats {
        grid-template-columns: 1fr;
    }
    
    .stat-number {
        font-size: 28px;
    }
}

/* 合作伙伴样式 */
.partners {
    padding: 80px 0;
    background: linear-gradient(135deg, #f8f9fa 0%, #ffffff 100%);
}

.partners-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
    margin-bottom: 50px;
}

.partner-item {
    background: white;
    border-radius: 12px;
    padding: 30px 20px;
    text-align: center;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
    border: 2px solid transparent;
    position: relative;
    overflow: hidden;
}

.partner-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, #e53e3e, #c53030);
    transition: left 0.4s ease;
}

.partner-item:hover::before {
    left: 0;
}

.partner-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 35px rgba(229, 62, 62, 0.15);
    border-color: #e53e3e;
}

.partner-logo {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.partner-logo-img {
    width: 80px;
    height: 50px;
    object-fit: contain;
    transition: transform 0.3s ease, filter 0.3s ease;
    filter: grayscale(0%) opacity(1);
}

.partner-item:hover .partner-logo-img {
    transform: scale(1.1);
    filter: grayscale(0%) opacity(1) brightness(1.1);
}

.partner-name {
    font-size: 16px;
    font-weight: 600;
    color: #2c3e50;
    transition: color 0.3s ease;
    text-align: center;
    line-height: 1.3;
}

.partner-item:hover .partner-name {
    color: #e53e3e;
}

.partners-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
    margin-top: 60px;
    padding: 40px;
    background: white;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
}

.partners-stats .stat-item {
    text-align: center;
    padding: 20px;
    border-radius: 12px;
    background: linear-gradient(135deg, #e53e3e 0%, #c53030 100%);
    color: white;
    transition: transform 0.3s ease;
}

.partners-stats .stat-item:hover {
    transform: translateY(-5px);
}

.partners-stats .stat-number {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 8px;
    display: block;
}

.partners-stats .stat-label {
    font-size: 14px;
    opacity: 0.9;
    font-weight: 500;
}

/* 合作伙伴响应式设计 */
@media (max-width: 768px) {
    .partners-grid {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
        gap: 20px;
    }
    
    .partner-item {
        padding: 20px 15px;
    }
    
    .partner-name {
        font-size: 16px;
    }
    
    .partner-desc {
        font-size: 12px;
    }
    
    .partners-stats {
        grid-template-columns: repeat(2, 1fr);
        padding: 30px 20px;
    }
}

@media (max-width: 480px) {
    .partners-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .partners-stats {
        grid-template-columns: 1fr;
    }
}

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

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

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

/* 视差效果增强 - 合并到主要.hero规则中 */

/* 响应式背景优化 */
@media (max-width: 768px) {
    .hero {
        background-attachment: scroll;
        min-height: 80vh;
        padding: 100px 0 60px;
    }
    
    .hero::before {
        background: linear-gradient(
            135deg,
            rgba(229, 62, 62, 0.9) 0%,
            rgba(197, 48, 48, 0.8) 25%,
            rgba(0, 0, 0, 0.7) 50%,
            rgba(0, 0, 0, 0.5) 75%,
            rgba(0, 0, 0, 0.4) 100%
        );
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }
    
    .hero-title {
        font-size: 32px;
    }
    
    .hero-subtitle {
        font-size: 16px;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 80px 0 40px;
    }
    
    .hero-title {
        font-size: 24px;
    }
    
    .hero-subtitle {
        font-size: 14px;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        max-width: 250px;
    }
}