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

:root {
    --primary-color: #0052D9;
    --secondary-color: #00A870;
    --accent-color: #FF6B00;
    --text-primary: #1D2129;
    --text-secondary: #86909C;
    --bg-light: #F7F8FA;
    --bg-white: #FFFFFF;
    --border-color: #E5E6EB;
    --shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
    --shadow-hover: 0 4px 20px rgba(0, 0, 0, 0.12);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', Helvetica, Arial, sans-serif;
    font-size: 14px;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-light);
    overflow-x: hidden;
}

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

/* 按钮样式 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 24px;
    font-size: 14px;
    font-weight: 500;
    border-radius: 4px;
    border: 2px solid transparent;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    white-space: nowrap;
}

.btn-primary {
    background: var(--primary-color);
    color: #fff;
}

.btn-primary:hover {
    background: #003CA9;
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

.btn-outline {
    border-color: var(--primary-color);
    color: var(--primary-color);
    background: transparent;
}

.btn-outline:hover {
    background: var(--primary-color);
    color: #fff;
}

.btn-lg {
    padding: 14px 32px;
    font-size: 16px;
}

.btn-full {
    width: 100%;
}

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow);
    z-index: 1000;
    transition: var(--transition);
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 1);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 64px;
}

.nav-left {
    display: flex;
    align-items: center;
    gap: 40px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 20px;
    font-weight: 600;
    color: var(--primary-color);
    text-decoration: none;
}

.logo i {
    font-size: 24px;
}

.nav-menu {
    display: flex;
    gap: 24px;
}

.nav-link {
    color: var(--text-primary);
    text-decoration: none;
    font-size: 15px;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: var(--transition);
}

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

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

.nav-right {
    display: flex;
    align-items: center;
    gap: 12px;
}

.btn-login {
    background: transparent;
    color: var(--text-primary);
    border: 2px solid var(--border-color);
    padding: 10px 24px;
    font-size: 14px;
    font-weight: 500;
    border-radius: 4px;
    cursor: pointer;
    transition: var(--transition);
}

.btn-login:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: translateY(-1px);
}

.btn-register {
    background: var(--primary-color);
    color: #fff;
    padding: 10px 24px;
    font-size: 14px;
    font-weight: 500;
    border-radius: 4px;
    border: 2px solid transparent;
    cursor: pointer;
    transition: var(--transition);
}

.btn-register:hover {
    background: #003CA9;
    transform: translateY(-1px);
    box-shadow: var(--shadow);
}

.btn-menu {
    display: none;
    background: none;
    border: none;
    font-size: 20px;
    color: var(--text-primary);
    cursor: pointer;
}

/* Hero区域 */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, #0052D9 0%, #00A870 100%);
    overflow: hidden;
    padding-top: 64px;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('https://images.unsplash.com/photo-1451187580459-43490279c0fa?w=1920') center/cover;
    opacity: 0.1;
    animation: bgMove 20s ease-in-out infinite;
}

@keyframes bgMove {
    0%, 100% {
        transform: scale(1);
        opacity: 0.1;
    }
    50% {
        transform: scale(1.1);
        opacity: 0.15;
    }
}

.hero-content {
    position: relative;
    z-index: 1;
    color: #fff;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    font-size: 56px;
    font-weight: 700;
    margin-bottom: 20px;
    animation: slideDown 0.8s ease-out;
}

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

.hero-subtitle {
    font-size: 20px;
    margin-bottom: 40px;
    animation: fadeIn 1s ease-out 0.3s both;
}

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

.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    margin-bottom: 60px;
    animation: slideUp 0.8s ease-out 0.6s both;
}

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

.hero-buttons .btn {
    padding: 16px 40px;
    font-size: 16px;
}

.hero-buttons .btn-primary {
    background: #fff;
    color: var(--primary-color);
}

.hero-buttons .btn-primary:hover {
    background: var(--bg-light);
    transform: translateY(-2px);
}

.hero-buttons .btn-outline {
    border-color: #fff;
    color: #fff;
}

.hero-buttons .btn-outline:hover {
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 60px;
    animation: fadeIn 1s ease-out 0.9s both;
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 48px;
    font-weight: 700;
    display: block;
    margin-bottom: 8px;
}

.stat-label {
    font-size: 14px;
    opacity: 0.9;
}

/* 浮动形状 */
.floating-shapes {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
}

.shape {
    position: absolute;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    animation: float 6s ease-in-out infinite;
}

.shape-1 {
    width: 300px;
    height: 300px;
    top: 10%;
    left: 10%;
    animation-delay: 0s;
}

.shape-2 {
    width: 200px;
    height: 200px;
    top: 60%;
    right: 15%;
    animation-delay: 2s;
}

.shape-3 {
    width: 150px;
    height: 150px;
    bottom: 20%;
    left: 20%;
    animation-delay: 4s;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0) rotate(0deg);
    }
    50% {
        transform: translateY(-20px) rotate(180deg);
    }
}

/* Section样式 */
.section {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-size: 36px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.section-subtitle {
    font-size: 16px;
    color: var(--text-secondary);
}

/* 产品服务 */
.products {
    background: var(--bg-white);
}

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

.product-card {
    background: var(--bg-white);
    border-radius: 8px;
    padding: 40px 30px;
    text-align: center;
    transition: var(--transition);
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
}

.product-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    transform: scaleX(0);
    transition: var(--transition);
}

.product-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-hover);
}

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

.product-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 24px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.product-icon i {
    font-size: 32px;
    color: #fff;
}

.product-card:hover .product-icon {
    transform: scale(1.1) rotate(360deg);
}

.product-title {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.product-desc {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 20px;
    line-height: 1.6;
}

.product-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

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

.product-link i {
    transition: var(--transition);
}

/* 核心优势 */
.advantages {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
}

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

.advantage-item {
    text-align: center;
    padding: 40px 20px;
    transition: var(--transition);
}

.advantage-item:hover {
    transform: translateY(-5px);
}

.advantage-icon {
    width: 100px;
    height: 100px;
    margin: 0 auto 20px;
    background: var(--bg-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.advantage-icon i {
    font-size: 40px;
    color: var(--primary-color);
}

.advantage-item:hover .advantage-icon {
    transform: scale(1.1);
    box-shadow: var(--shadow-hover);
}

.advantage-title {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.advantage-desc {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* 客户案例 */
.cases {
    background: var(--bg-white);
}

.cases-slider {
    display: flex;
    gap: 30px;
    overflow-x: auto;
    padding: 20px 0;
    scroll-behavior: smooth;
    -webkit-overflow-scrolling: touch;
}

.cases-slider::-webkit-scrollbar {
    height: 6px;
}

.cases-slider::-webkit-scrollbar-track {
    background: var(--bg-light);
    border-radius: 3px;
}

.cases-slider::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 3px;
}

.case-card {
    flex: 0 0 280px;
    background: var(--bg-white);
    border-radius: 8px;
    padding: 40px 30px;
    text-align: center;
    transition: var(--transition);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow);
}

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

.case-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, var(--accent-color), var(--primary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.case-icon i {
    font-size: 36px;
    color: #fff;
}

.case-card:hover .case-icon {
    transform: scale(1.1);
}

.case-title {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.case-desc {
    font-size: 14px;
    color: var(--text-secondary);
}

.slider-controls {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-top: 30px;
}

.slider-btn {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--bg-white);
    border: 1px solid var(--border-color);
    cursor: pointer;
    transition: var(--transition);
    font-size: 18px;
    color: var(--text-primary);
}

.slider-btn:hover {
    background: var(--primary-color);
    color: #fff;
    border-color: var(--primary-color);
}

/* 动态数据展示 */
.data-showcase {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: #fff;
}

.data-showcase .section-title,
.data-showcase .section-subtitle {
    color: #fff;
}

.data-showcase .section-subtitle {
    opacity: 0.9;
}

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

.data-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 12px;
    padding: 30px;
    display: flex;
    align-items: center;
    gap: 20px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: var(--transition);
}

.data-card:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.15);
}

.data-icon {
    width: 60px;
    height: 60px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.data-icon i {
    font-size: 24px;
    color: #fff;
}

.data-content {
    flex: 1;
}

.data-title {
    font-size: 14px;
    opacity: 0.9;
    margin-bottom: 8px;
}

.data-number {
    font-size: 32px;
    font-weight: 700;
    display: inline-block;
}

.data-unit {
    font-size: 14px;
    opacity: 0.8;
}

/* CTA区域 */
.cta-section {
    background: var(--bg-white);
    padding: 80px 0;
}

.cta-content {
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}

.cta-title {
    font-size: 36px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.cta-subtitle {
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: 32px;
}

.cta-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
}

/* 页脚 */
.footer {
    background: #1D2129;
    color: #fff;
    padding-top: 60px;
}

.footer-top {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-title {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 20px;
}

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

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

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: var(--transition);
}

.footer-links a:hover {
    color: #fff;
    padding-left: 5px;
}

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

.footer-contact li {
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 10px;
    color: rgba(255, 255, 255, 0.7);
}

.footer-contact i {
    width: 20px;
}

.social-links {
    display: flex;
    gap: 12px;
    margin-top: 20px;
}

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

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

.footer-bottom {
    padding: 40px 0;
}

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

.footer-content p {
    color: rgba(255, 255, 255, 0.6);
    font-size: 12px;
    line-height: 2;
    margin: 5px 0;
}

/* 弹窗 */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 2000;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.3s ease-out;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--bg-white);
    border-radius: 8px;
    width: 100%;
    max-width: 440px;
    position: relative;
    animation: slideUp 0.3s ease-out;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
}

.modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    background: none;
    border: none;
    font-size: 24px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
}

.modal-close:hover {
    color: var(--text-primary);
}

.modal-header {
    padding: 30px 30px 20px;
    text-align: center;
}

.modal-header h2 {
    font-size: 24px;
    font-weight: 600;
    color: var(--text-primary);
}

.modal-body {
    padding: 20px 30px 30px;
}

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

.form-input {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 14px;
    transition: var(--transition);
}

.form-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 82, 217, 0.1);
}

.form-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
    font-size: 13px;
    color: var(--text-secondary);
}

.checkbox-label input[type="checkbox"] {
    margin: 0;
}

.forgot-link {
    color: var(--primary-color);
    text-decoration: none;
    font-size: 13px;
}

.forgot-link:hover {
    text-decoration: underline;
}

.btn-code {
    position: absolute;
    right: 8px;
    top: 50%;
    transform: translateY(-50%);
    background: transparent;
    border: 1px solid var(--primary-color);
    color: var(--primary-color);
    padding: 6px 12px;
    border-radius: 4px;
    font-size: 12px;
    cursor: pointer;
    transition: var(--transition);
}

.btn-code:hover {
    background: var(--primary-color);
    color: #fff;
}

.modal-divider {
    text-align: center;
    margin: 24px 0;
    position: relative;
}

.modal-divider::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--border-color);
}

.modal-divider span {
    position: relative;
    background: var(--bg-white);
    padding: 0 12px;
    color: var(--text-secondary);
    font-size: 13px;
}

.social-login {
    display: flex;
    gap: 16px;
    justify-content: center;
}

.social-login-btn {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    border: 1px solid var(--border-color);
    background: var(--bg-white);
    cursor: pointer;
    transition: var(--transition);
    font-size: 20px;
}

.social-login-btn:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow);
}

.social-login-btn.wechat {
    color: #07C160;
}

.social-login-btn.qq {
    color: #0052D9;
}

.social-login-btn.github {
    color: #1D2129;
}

/* 回到顶部 */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--primary-color);
    color: #fff;
    border: none;
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    transition: var(--transition);
    box-shadow: var(--shadow);
    z-index: 999;
}

.back-to-top.visible {
    display: flex;
    animation: fadeIn 0.3s ease-out;
}

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .hero-title {
        font-size: 36px;
    }

    .hero-subtitle {
        font-size: 16px;
    }

    .hero-buttons {
        flex-direction: column;
    }

    .hero-stats {
        flex-direction: column;
        gap: 30px;
    }

    .nav-menu {
        display: none;
    }

    .btn-menu {
        display: block;
    }

    .section {
        padding: 60px 0;
    }

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

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

    .advantages-content {
        grid-template-columns: 1fr;
    }

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

    .footer-top {
        grid-template-columns: 1fr;
    }

    .cta-buttons {
        flex-direction: column;
    }
}

/* 动画效果 */
.animate-slide-down {
    animation: slideDown 0.8s ease-out;
}

.animate-fade-in {
    animation: fadeIn 1s ease-out;
}

.animate-slide-up {
    animation: slideUp 0.8s ease-out;
}

[data-aos] {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease-out;
}

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