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

html {
    scroll-behavior: smooth;
}

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

a {
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
}

ul {
    list-style: none;
}

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

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

/* 导航栏 */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.nav-main {
    padding: 12px 0;
}

.nav-main .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo a {
    display: flex;
    align-items: center;
}

.logo img {
    width: 50px;
    height: 50px;
    border-radius: 8px;
}

.nav-menu {
    display: flex;
    gap: 30px;
}

.nav-menu a {
    font-size: 15px;
    color: #4a5568;
    font-weight: 500;
    position: relative;
}

.nav-menu a:hover {
    color: #2b6cb0;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, #2b6cb0, #3182ce);
    transition: width 0.3s ease;
}

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

.nav-btn {
    background: linear-gradient(135deg, #2b6cb0 0%, #3182ce 100%);
    color: #fff !important;
    padding: 10px 28px;
    border-radius: 20px;
    font-weight: 600;
}

.nav-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(43, 108, 176, 0.4);
}

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

.nav-toggle span {
    width: 25px;
    height: 2px;
    background: #4a5568;
}

/* Banner区域 */
.banner {
    padding: 100px 0 80px;
    background: linear-gradient(135deg, #0d1b2a 0%, #1b263b 50%, #2d4a6f 100%);
    position: relative;
    overflow: hidden;
}

.banner::before {
    content: '';
    position: absolute;
    top: 0;
    right: -100px;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(43, 108, 176, 0.15) 0%, transparent 60%);
    border-radius: 50%;
}

.banner-content {
    display: flex;
    align-items: center;
    gap: 80px;
    position: relative;
    z-index: 2;
}

.banner-text {
    flex: 1;
}

.banner-badge {
    display: inline-block;
    padding: 6px 18px;
    background: linear-gradient(135deg, rgba(43, 108, 176, 0.8) 0%, rgba(49, 130, 206, 0.8) 100%);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 20px;
    font-size: 13px;
    color: #ffffff;
    margin-bottom: 20px;
    font-weight: 500;
    letter-spacing: 1px;
}

.banner-text h1 {
    font-size: 48px;
    color: #fff;
    margin-bottom: 18px;
    font-weight: 700;
    line-height: 1.2;
}

.tagline {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 22px;
}

.description {
    font-size: 15px;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.8;
    margin-bottom: 35px;
    max-width: 500px;
}

.banner-stats {
    display: flex;
    gap: 80px;
    margin-bottom: 40px;
    padding: 30px 40px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

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

.stat-value {
    display: block;
    font-size: 38px;
    font-weight: 700;
    color: #fff;
    line-height: 1.2;
}

.stat-label {
    display: block;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
    margin-top: 8px;
}

.banner-buttons {
    display: flex;
    gap: 20px;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    border-radius: 25px;
    font-size: 15px;
    font-weight: 600;
    transition: all 0.3s ease;
}

.btn-primary {
    background: #fff;
    color: #1a365d;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.25);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.15);
    color: #fff;
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.25);
}

.banner-image {
    flex: 0 0 340px;
    position: relative;
}

.banner-image img {
    width: 100%;
    max-width: 340px;
    height: auto;
    border-radius: 20px;
    box-shadow: 0 25px 60px rgba(0, 0, 0, 0.4);
}

/* 产品概述 */
.overview {
    padding: 80px 0;
    background: #fff;
}

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

.section-header h2 {
    font-size: 34px;
    color: #1a365d;
    margin-bottom: 15px;
    font-weight: 700;
}

.section-header p {
    font-size: 15px;
    color: #718096;
}

.overview-content {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 25px;
}

.overview-item {
    text-align: center;
    padding: 35px 25px;
    background: #fff;
    border-radius: 12px;
    border: 1px solid #e2e8f0;
    transition: all 0.3s ease;
}

.overview-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 40px rgba(43, 108, 176, 0.15);
    border-color: #2b6cb0;
}

.overview-icon {
    width: 65px;
    height: 65px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, #2b6cb0 0%, #3182ce 100%);
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.overview-icon i {
    font-size: 28px;
    color: #fff;
}

.overview-item h3 {
    font-size: 17px;
    color: #1a365d;
    margin-bottom: 10px;
    font-weight: 600;
}

.overview-item p {
    font-size: 13px;
    color: #718096;
    line-height: 1.6;
}

/* 会员运营体系 */
.member-system {
    padding: 80px 0;
    background: linear-gradient(135deg, #0d1b2a 0%, #1b263b 100%);
}

.member-system .section-header h2,
.member-system .section-header p {
    color: #fff;
}

.member-content {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 25px;
}

.member-card {
    text-align: center;
    padding: 40px 25px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 15px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
}

.member-card:hover {
    background: rgba(255, 255, 255, 0.12);
    transform: translateY(-5px);
}

.member-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, #4299e1 0%, #2b6cb0 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.member-icon i {
    font-size: 30px;
    color: #fff;
}

.member-card h3 {
    font-size: 17px;
    color: #fff;
    margin-bottom: 12px;
    font-weight: 600;
}

.member-card p {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.6;
}

/* 行业现状 */
.industry {
    padding: 80px 0;
    background: #f7fafc;
}

.industry-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.industry-category {
    background: #fff;
    border-radius: 15px;
    padding: 25px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
}

.category-title {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 2px solid #e2e8f0;
}

.category-title i {
    font-size: 28px;
    color: #2b6cb0;
}

.category-title h3 {
    font-size: 18px;
    color: #1a365d;
    font-weight: 600;
}

.category-items {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.industry-item {
    display: flex;
    align-items: flex-start;
    gap: 15px;
    padding: 15px;
    background: #f7fafc;
    border-radius: 10px;
    transition: all 0.3s ease;
}

.industry-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    background: #fff;
}

.industry-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, #fc8181 0%, #f56565 100%);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.industry-icon i {
    font-size: 18px;
    color: #fff;
}

.industry-info h3 {
    font-size: 14px;
    color: #1a365d;
    margin-bottom: 5px;
    font-weight: 600;
}

.industry-info p {
    font-size: 12px;
    color: #718096;
    line-height: 1.5;
}

@media (max-width: 768px) {
    .industry-grid {
        grid-template-columns: 1fr;
    }
}

/* 功能介绍 */
.features {
    padding: 80px 0;
    background: #fff;
}

.features-content {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 25px;
}

.feature-card {
    padding: 30px 20px;
    background: #fff;
    border-radius: 12px;
    border: 1px solid #e2e8f0;
    transition: all 0.3s ease;
    text-align: center;
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(43, 108, 176, 0.15);
    border-color: #2b6cb0;
}

.feature-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto 18px;
    background: linear-gradient(135deg, #e6fffa 0%, #b2f5ea 100%);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.feature-icon i {
    font-size: 26px;
    color: #319795;
}

.feature-card h3 {
    font-size: 15px;
    color: #1a365d;
    margin-bottom: 10px;
    font-weight: 600;
    line-height: 1.4;
}

.feature-card p {
    font-size: 12px;
    color: #718096;
    line-height: 1.6;
}

/* 流量闭环 */
.traffic-loop {
    padding: 80px 0;
    background: linear-gradient(135deg, #0d1b2a 0%, #1b263b 100%);
}

.traffic-loop .section-header h2,
.traffic-loop .section-header p {
    color: #fff;
}

.traffic-content {
    position: relative;
}

.traffic-cycle {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
}

.cycle-item {
    flex: 1;
    text-align: center;
    padding: 25px 15px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
}

.cycle-item:hover {
    background: rgba(43, 108, 176, 0.3);
    transform: translateY(-5px);
}

.cycle-icon {
    width: 55px;
    height: 55px;
    margin: 0 auto 12px;
    background: linear-gradient(135deg, #4299e1 0%, #2b6cb0 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.cycle-icon i {
    font-size: 22px;
    color: #fff;
}

.cycle-item h3 {
    font-size: 14px;
    color: #fff;
    margin-bottom: 8px;
    font-weight: 600;
}

.cycle-item p {
    font-size: 11px;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.5;
}

.cycle-arrow {
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 20px;
    color: rgba(255, 255, 255, 0.4);
    padding: 0 5px;
}

/* 技术框架 */
.technology {
    padding: 80px 0;
    background: #f7fafc;
}

.technology-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.tech-stack h3 {
    font-size: 20px;
    color: #1a365d;
    margin-bottom: 25px;
    font-weight: 600;
}

.tech-layers {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.tech-layer {
    padding: 20px;
    background: #fff;
    border-radius: 10px;
    border-left: 4px solid #2b6cb0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.layer-title {
    font-size: 14px;
    color: #1a365d;
    font-weight: 600;
}

.layer-content {
    font-size: 13px;
    color: #718096;
}

.tech-highlights h3 {
    font-size: 20px;
    color: #1a365d;
    margin-bottom: 25px;
    font-weight: 600;
}

.highlight-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
}

.highlight-card {
    padding: 25px;
    background: linear-gradient(135deg, #2b6cb0 0%, #3182ce 100%);
    border-radius: 12px;
    text-align: center;
}

.highlight-icon {
    width: 50px;
    height: 50px;
    margin: 0 auto 15px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.highlight-card h4 {
    font-size: 15px;
    color: #fff;
    margin-bottom: 8px;
    font-weight: 600;
}

.highlight-card p {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.8);
}

/* 运营管理 */
.operation {
    padding: 80px 0;
    background: #fff;
}

.operation-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
}

.operation-left img {
    width: 100%;
    border-radius: 15px;
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.1);
}

.operation-right {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.operation-item {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    padding: 20px;
    background: #f7fafc;
    border-radius: 10px;
    transition: all 0.3s ease;
}

.operation-item:hover {
    background: #edf2f7;
}

.operation-icon {
    width: 45px;
    height: 45px;
    background: linear-gradient(135deg, #48bb78 0%, #38a169 100%);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.operation-icon i {
    font-size: 20px;
    color: #fff;
}

.operation-info h3 {
    font-size: 16px;
    color: #1a365d;
    margin-bottom: 8px;
    font-weight: 600;
}

.operation-info p {
    font-size: 13px;
    color: #718096;
    line-height: 1.6;
}

/* 核心价值闭环 */
.value-loop {
    padding: 80px 0;
    background: linear-gradient(135deg, #0d1b2a 0%, #1b263b 100%);
}

.value-loop .section-header h2,
.value-loop .section-header p {
    color: #fff;
}

.value-loop-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 20px;
}

.value-stage {
    flex: 1;
    padding: 25px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 12px;
    text-align: center;
}

.stage-title {
    font-size: 14px;
    color: #fff;
    font-weight: 600;
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.stage-items {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.stage-item {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.8);
}

.stage-sub {
    font-size: 11px;
    color: rgba(255, 255, 255, 0.5);
}

.stage-divider {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.3);
    text-align: center;
}

.arrow-right {
    display: flex;
    align-items: center;
    font-size: 24px;
    color: rgba(255, 255, 255, 0.4);
    padding: 0 10px;
}

/* 下载区域 */
.download {
    padding: 80px 0;
    background: #fff;
}

.download-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
}

.download-left h2 {
    font-size: 28px;
    color: #1a365d;
    margin-bottom: 15px;
    font-weight: 700;
}

.download-left p {
    font-size: 15px;
    color: #718096;
    margin-bottom: 30px;
}

.download-buttons {
    display: flex;
    gap: 20px;
}

.download-btn {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 15px 30px;
    background: linear-gradient(135deg, #1a365d 0%, #2b6cb0 100%);
    border-radius: 12px;
    color: #fff;
    transition: all 0.3s ease;
}

.download-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(43, 108, 176, 0.4);
}

.download-btn i {
    font-size: 32px;
}

.download-btn div {
    display: flex;
    flex-direction: column;
}

.download-btn div span:first-child {
    font-size: 16px;
    font-weight: 600;
}

.download-btn div span:last-child {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.7);
}

.download-btn.disabled {
    background: #e2e8f0;
    cursor: not-allowed;
}

.download-btn.disabled:hover {
    transform: none;
    box-shadow: none;
}

.download-right {
    text-align: center;
}

.qr-code {
    display: inline-block;
    padding: 20px;
    background: #fff;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    margin-bottom: 20px;
}

.qr-code img {
    width: 180px;
    height: 180px;
    border-radius: 10px;
}

.qr-code p {
    font-size: 14px;
    color: #4a5568;
    margin-top: 10px;
}

.h5-link {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 12px 25px;
    background: #f7fafc;
    border-radius: 25px;
    color: #2b6cb0;
    font-weight: 500;
    transition: all 0.3s ease;
}

.h5-link:hover {
    background: #edf2f7;
}

/* 页脚 */
.footer {
    padding: 60px 0 30px;
    background: #0d1b2a;
    color: #fff;
}

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

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

.footer-section p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.7;
    margin-bottom: 20px;
}

.footer-section ul {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-section ul li {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
}

.footer-section ul li i {
    margin-right: 8px;
    color: #4299e1;
}

.footer-section ul li a {
    color: rgba(255, 255, 255, 0.7);
    transition: color 0.3s ease;
}

.footer-section ul li a:hover {
    color: #4299e1;
}

.social-links {
    display: flex;
    gap: 15px;
}

.social-links a {
    width: 36px;
    height: 36px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    transition: all 0.3s ease;
}

.social-links a:hover {
    background: #4299e1;
}

.footer-bottom {
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
}

.footer-bottom p {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.5);
}

.footer-bottom a {
    color: rgba(255, 255, 255, 0.5);
    text-decoration: underline;
}

/* 响应式设计 */
@media (max-width: 992px) {
    .nav-menu {
        display: none;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .banner-content {
        flex-direction: column;
        text-align: center;
        gap: 50px;
    }
    
    .banner-text h1 {
        font-size: 36px;
    }
    
    .banner-stats {
        justify-content: center;
    }
    
    .overview-content,
    .member-content {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .features-content {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .traffic-cycle {
        flex-wrap: wrap;
    }
    
    .cycle-item {
        flex: 0 0 calc(50% - 10px);
    }
    
    .cycle-arrow {
        display: none;
    }
    
    .technology-content {
        grid-template-columns: 1fr;
    }
    
    .operation-content {
        grid-template-columns: 1fr;
    }
    
    .value-loop-content {
        flex-wrap: wrap;
    }
    
    .value-stage {
        flex: 0 0 calc(50% - 10px);
    }
    
    .download-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .download-buttons {
        justify-content: center;
    }
    
    .footer-top {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .features-content {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 600px) {
    .banner-text h1 {
        font-size: 28px;
    }
    
    .banner-stats {
        gap: 30px;
    }
    
    .overview-content,
    .member-content,
    .industry-content,
    .features-content {
        grid-template-columns: 1fr;
    }
    
    .traffic-cycle {
        flex-direction: column;
    }
    
    .cycle-item {
        flex: 0 0 100%;
    }
    
    .value-stage {
        flex: 0 0 100%;
    }
    
    .footer-top {
        grid-template-columns: 1fr;
    }
}

/* 移动端菜单 */
.nav-menu.active {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: #fff;
    padding: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    gap: 15px;
}

/* 返回顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #2b6cb0 0%, #3182ce 100%);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 999;
    font-size: 20px;
    box-shadow: 0 5px 20px rgba(43, 108, 176, 0.4);
}

.back-to-top:hover {
    transform: translateY(-5px) scale(1.1);
}

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