/* 成都翊渡汇元网络科技有限公司 - 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    color: #333;
    line-height: 1.6;
    background-color: #fff;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
}

/* 颜色变量 */
:root {
    --primary-color: #1a56db;
    --primary-dark: #1240a8;
    --primary-light: #3b82f6;
    --accent-color: #06b6d4;
    --text-dark: #1f2937;
    --text-gray: #6b7280;
    --text-light: #9ca3af;
    --bg-light: #f9fafb;
    --bg-gradient: linear-gradient(135deg, #1a56db 0%, #06b6d4 100%);
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.07);
    --shadow-lg: 0 10px 15px rgba(0,0,0,0.1);
    --shadow-xl: 0 20px 25px rgba(0,0,0,0.15);
}

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

/* 头部导航 */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

.header.scrolled {
    box-shadow: var(--shadow-md);
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 20px;
    font-weight: 700;
    color: var(--primary-color);
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: var(--bg-gradient);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-weight: bold;
    font-size: 18px;
}

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

.nav-links a {
    font-size: 15px;
    font-weight: 500;
    color: var(--text-dark);
    position: relative;
    transition: color 0.3s;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--bg-gradient);
    transition: width 0.3s;
}

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

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

/* 移动端菜单 */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 5px;
}

.mobile-menu-btn span {
    width: 25px;
    height: 3px;
    background: var(--text-dark);
    border-radius: 3px;
    transition: all 0.3s;
}

/* Hero 区域 */
.hero {
    padding: 150px 0 100px;
    background: var(--bg-gradient);
    color: #fff;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle at 20% 50%, rgba(255,255,255,0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(255,255,255,0.08) 0%, transparent 40%);
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
}

.hero h1 {
    font-size: 48px;
    font-weight: 800;
    margin-bottom: 20px;
    line-height: 1.2;
}

.hero h1 span {
    display: block;
    font-size: 24px;
    font-weight: 400;
    opacity: 0.9;
    margin-top: 10px;
}

.hero p {
    font-size: 18px;
    max-width: 700px;
    margin: 0 auto 40px;
    opacity: 0.95;
}

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

.btn {
    display: inline-block;
    padding: 14px 36px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 16px;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
}

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

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.2);
}

.btn-outline {
    background: transparent;
    color: #fff;
    border: 2px solid rgba(255,255,255,0.6);
}

.btn-outline:hover {
    background: rgba(255,255,255,0.15);
    border-color: #fff;
    transform: translateY(-3px);
}

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

.btn-dark:hover {
    background: var(--primary-dark);
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.btn-large {
    padding: 16px 48px;
    font-size: 17px;
}

/* 通用区块 */
.section {
    padding: 80px 0;
}

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

.section-title h2 {
    font-size: 36px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 15px;
}

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

.section-title .subtitle {
    display: inline-block;
    color: var(--primary-color);
    font-weight: 600;
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 10px;
}

/* 特色卡片 */
.features {
    background: var(--bg-light);
}

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

.feature-card {
    background: #fff;
    border-radius: 16px;
    padding: 40px 30px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
    border: 1px solid #f3f4f6;
}

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

.feature-icon {
    width: 70px;
    height: 70px;
    background: var(--bg-gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 25px;
    color: #fff;
    font-size: 28px;
}

.feature-card h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 15px;
    color: var(--text-dark);
}

.feature-card p {
    font-size: 15px;
    color: var(--text-gray);
    line-height: 1.7;
}

/* 关于我们 */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-image {
    position: relative;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.about-image-placeholder {
    width: 100%;
    aspect-ratio: 4/3;
    background: var(--bg-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 60px;
}

.about-content h2 {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 20px;
}

.about-content p {
    font-size: 16px;
    color: var(--text-gray);
    line-height: 1.8;
    margin-bottom: 20px;
}

.stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-top: 40px;
}

.stat-item {
    text-align: center;
    padding: 20px;
    background: var(--bg-light);
    border-radius: 12px;
}

.stat-number {
    font-size: 32px;
    font-weight: 800;
    color: var(--primary-color);
    margin-bottom: 5px;
}

.stat-label {
    font-size: 14px;
    color: var(--text-gray);
}

/* 服务列表 */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.service-card {
    position: relative;
    background: #fff;
    border-radius: 16px;
    padding: 40px 30px;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
    border: 1px solid #f3f4f6;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--bg-gradient);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

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

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

.service-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, rgba(26,86,219,0.1) 0%, rgba(6,182,212,0.1) 100%);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 25px;
    color: var(--primary-color);
    font-size: 26px;
}

.service-card h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 15px;
    color: var(--text-dark);
}

.service-card p {
    font-size: 15px;
    color: var(--text-gray);
    line-height: 1.7;
    margin-bottom: 20px;
}

.service-features {
    list-style: none;
}

.service-features li {
    font-size: 14px;
    color: var(--text-gray);
    padding: 6px 0;
    padding-left: 24px;
    position: relative;
}

.service-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
}

/* 解决方案 */
.solutions {
    background: var(--bg-light);
}

.solution-card {
    display: flex;
    background: #fff;
    border-radius: 16px;
    overflow: hidden;
    margin-bottom: 30px;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s;
}

.solution-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-3px);
}

.solution-image {
    width: 40%;
    min-height: 250px;
    background: var(--bg-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 50px;
    flex-shrink: 0;
}

.solution-content {
    flex: 1;
    padding: 40px;
}

.solution-content h3 {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 15px;
    color: var(--text-dark);
}

.solution-content p {
    font-size: 15px;
    color: var(--text-gray);
    line-height: 1.7;
    margin-bottom: 20px;
}

.solution-tags {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.solution-tag {
    padding: 6px 14px;
    background: linear-gradient(135deg, rgba(26,86,219,0.08) 0%, rgba(6,182,212,0.08) 100%);
    color: var(--primary-color);
    border-radius: 20px;
    font-size: 13px;
    font-weight: 500;
}

/* CTA 区域 */
.cta {
    background: var(--bg-gradient);
    color: #fff;
    text-align: center;
    padding: 100px 0;
    position: relative;
    overflow: hidden;
}

.cta::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.05) 0%, transparent 60%);
}

.cta-content {
    position: relative;
    z-index: 2;
}

.cta h2 {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 20px;
}

.cta p {
    font-size: 18px;
    opacity: 0.95;
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* 联系我们 */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.contact-info h3 {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 25px;
    color: var(--text-dark);
}

.contact-item {
    display: flex;
    gap: 15px;
    margin-bottom: 25px;
    padding: 20px;
    background: var(--bg-light);
    border-radius: 12px;
    transition: all 0.3s;
}

.contact-item:hover {
    box-shadow: var(--shadow-md);
    transform: translateX(5px);
}

.contact-icon {
    width: 50px;
    height: 50px;
    background: var(--bg-gradient);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 22px;
    flex-shrink: 0;
}

.contact-text h4 {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 5px;
}

.contact-text p {
    font-size: 14px;
    color: var(--text-gray);
}

.contact-form {
    background: var(--bg-light);
    padding: 40px;
    border-radius: 16px;
}

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

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-dark);
    margin-bottom: 8px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid #e5e7eb;
    border-radius: 10px;
    font-size: 15px;
    font-family: inherit;
    transition: all 0.3s;
    background: #fff;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(26,86,219,0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

/* 页脚 */
.footer {
    background: #1f2937;
    color: #d1d5db;
    padding: 60px 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-brand .logo {
    color: #fff;
    margin-bottom: 20px;
}

.footer-brand p {
    font-size: 14px;
    line-height: 1.8;
    color: #9ca3af;
}

.footer-col h4 {
    font-size: 16px;
    font-weight: 600;
    color: #fff;
    margin-bottom: 20px;
}

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

.footer-col ul li a {
    font-size: 14px;
    color: #9ca3af;
    transition: color 0.3s;
}

.footer-col ul li a:hover {
    color: #fff;
}

.footer-bottom {
    border-top: 1px solid #374151;
    padding: 25px 0;
    text-align: center;
}

.footer-bottom p {
    font-size: 13px;
    color: #6b7280;
}

/* 页面 Banner（二级页面） */
.page-banner {
    padding: 150px 0 80px;
    background: var(--bg-gradient);
    color: #fff;
    text-align: center;
}

.page-banner h1 {
    font-size: 42px;
    font-weight: 800;
    margin-bottom: 15px;
}

.page-banner p {
    font-size: 17px;
    opacity: 0.95;
    max-width: 600px;
    margin: 0 auto;
}

.breadcrumb {
    margin-top: 20px;
    font-size: 14px;
    opacity: 0.8;
}

.breadcrumb a {
    color: #fff;
}

.breadcrumb span {
    margin: 0 10px;
}

/* 关于我们页面专属样式 */
.timeline {
    position: relative;
    padding-left: 40px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 15px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--primary-color), var(--accent-color));
}

.timeline-item {
    position: relative;
    padding-bottom: 40px;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -32px;
    top: 5px;
    width: 14px;
    height: 14px;
    background: #fff;
    border: 3px solid var(--primary-color);
    border-radius: 50%;
}

.timeline-year {
    font-size: 16px;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 8px;
}

.timeline-content h4 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 8px;
}

.timeline-content p {
    font-size: 14px;
    color: var(--text-gray);
}

/* 价值观卡片 */
.values-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 25px;
}

.value-card {
    text-align: center;
    padding: 35px 25px;
    background: #fff;
    border-radius: 16px;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s;
}

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

.value-icon {
    width: 65px;
    height: 65px;
    background: var(--bg-gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    color: #fff;
    font-size: 28px;
}

.value-card h4 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--text-dark);
}

.value-card p {
    font-size: 14px;
    color: var(--text-gray);
    line-height: 1.6;
}

/* 支付场景展示 */
.payment-scenarios {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 25px;
}

.scenario-card {
    background: linear-gradient(135deg, #f8fafc 0%, #e0f2fe 100%);
    border-radius: 16px;
    padding: 35px 25px;
    text-align: center;
    transition: all 0.3s;
    border: 1px solid #e0f2fe;
}

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

.scenario-icon {
    font-size: 42px;
    margin-bottom: 18px;
}

.scenario-card h4 {
    font-size: 17px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text-dark);
}

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

/* 返回顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--bg-gradient);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s;
    box-shadow: var(--shadow-lg);
    z-index: 999;
    font-size: 20px;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: translateY(-3px);
}

/* 响应式 */
@media (max-width: 992px) {
    .hero h1 {
        font-size: 36px;
    }
    
    .about-grid,
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .solution-card {
        flex-direction: column;
    }
    
    .solution-image {
        width: 100%;
        min-height: 180px;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: #fff;
        flex-direction: column;
        padding: 30px;
        gap: 20px;
        box-shadow: var(--shadow-lg);
    }
    
    .nav-links.active {
        display: flex;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .hero {
        padding: 130px 0 70px;
    }
    
    .hero h1 {
        font-size: 28px;
    }
    
    .hero h1 span {
        font-size: 18px;
    }
    
    .hero p {
        font-size: 16px;
    }
    
    .section {
        padding: 60px 0;
    }
    
    .section-title h2 {
        font-size: 28px;
    }
    
    .stats {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .solution-content {
        padding: 30px 25px;
    }
    
    .page-banner {
        padding: 130px 0 60px;
    }
    
    .page-banner h1 {
        font-size: 30px;
    }
    
    .cta h2 {
        font-size: 28px;
    }
}