/* 基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-blue: #0089FF;
    --primary-cyan: #00B8D4;
    --accent-purple: #6C5CE7;
    --dark-bg: #0A0E27;
    --text-title: #1D2129;
    --text-body: #4E5969;
    --border-color: #E5E6EB;
    --gradient-primary: linear-gradient(135deg, #0089FF 0%, #00B8D4 100%);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-body);
    background: #fff;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 20px;
}

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

ul {
    list-style: none;
}

/* 按钮样式 */
.btn-primary {
    display: inline-block;
    padding: 12px 32px;
    background: var(--gradient-primary);
    color: #fff;
    border-radius: 8px;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 137, 255, 0.3);
}

.btn-secondary {
    display: inline-block;
    padding: 12px 32px;
    background: transparent;
    color: var(--primary-blue);
    border: 2px solid var(--primary-blue);
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

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

.btn-large {
    padding: 16px 40px;
    font-size: 18px;
}

/* 全局导航 */
.header {
    position: sticky;
    top: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    font-size: 24px;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.main-nav {
    flex: 1;
    margin: 0 40px;
}

.nav-list {
    display: flex;
    gap: 32px;
}

.nav-link {
    font-size: 15px;
    color: var(--text-title);
    font-weight: 500;
}

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

.header-actions {
    display: flex;
    align-items: center;
    gap: 20px;
}

.link-login {
    color: var(--text-body);
    font-size: 15px;
}

.link-login:hover {
    color: var(--primary-blue);
}

/* Hero 区域 */
.hero {
    position: relative;
    min-height: 90vh;
    display: flex;
    align-items: center;
    overflow: hidden;
    background: linear-gradient(135deg, #f0f7ff 0%, #e8f4fc 100%);
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1200 800"><circle cx="200" cy="200" r="300" fill="rgba(0,137,255,0.05)"/><circle cx="1000" cy="600" r="400" fill="rgba(0,184,212,0.05)"/></svg>');
    background-size: cover;
}

.hero-content {
    position: relative;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    padding: 80px 0;
}

.hero-title {
    font-size: 56px;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 24px;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 20px;
    color: var(--text-body);
    margin-bottom: 40px;
    line-height: 1.6;
}

.hero-cta {
    display: flex;
    gap: 16px;
    margin-bottom: 32px;
}

.hero-quick-links {
    display: flex;
    gap: 16px;
}

.quick-link {
    padding: 8px 16px;
    background: rgba(255, 255, 255, 0.8);
    border-radius: 20px;
    font-size: 14px;
    color: var(--primary-blue);
}

.quick-link:hover {
    background: var(--primary-blue);
    color: #fff;
}

.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-illustration {
    width: 400px;
    height: 400px;
    background: var(--gradient-primary);
    border-radius: 50%;
    opacity: 0.2;
}

.scroll-hint {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
}

.scroll-arrow {
    display: block;
    width: 24px;
    height: 24px;
    border-right: 2px solid var(--primary-blue);
    border-bottom: 2px solid var(--primary-blue);
    transform: rotate(45deg);
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: rotate(45deg) translateY(0); }
    40% { transform: rotate(45deg) translateY(-10px); }
    60% { transform: rotate(45deg) translateY(-5px); }
}

/* 通用区块样式 */
section {
    padding: 100px 0;
}

.section-title {
    font-size: 40px;
    font-weight: 700;
    color: var(--text-title);
    text-align: center;
    margin-bottom: 60px;
}

.section-title.light {
    color: #fff;
}

/* 产品概览 */
.products-overview {
    background: #fff;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.product-card {
    padding: 40px 32px;
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: 16px;
    text-align: center;
    transition: all 0.3s ease;
}

.product-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.1);
    border-color: var(--primary-blue);
}

.product-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

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

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

/* 解决方案 */
.solutions {
    background: #f8f9fa;
}

.solutions-tabs {
    max-width: 1000px;
    margin: 0 auto;
}

.tab-nav {
    display: flex;
    justify-content: center;
    gap: 40px;
    margin-bottom: 40px;
}

.tab-link {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-body);
    padding-bottom: 12px;
    border-bottom: 3px solid transparent;
}

.tab-link.active {
    color: var(--primary-blue);
    border-bottom-color: var(--primary-blue);
}

.tab-panel {
    display: none;
}

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

.solutions-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.solution-card {
    padding: 32px;
    background: #fff;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.solution-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

.solution-card h3 {
    font-size: 22px;
    color: var(--text-title);
    margin-bottom: 12px;
}

.solution-card p {
    font-size: 15px;
    color: var(--text-body);
}

/* AI 亮点区 */
.ai-highlight {
    background: var(--dark-bg);
    color: #fff;
}

.ai-demo {
    max-width: 800px;
    margin: 0 auto 40px;
}

.ai-chat-window {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    padding: 32px;
    margin-bottom: 32px;
}

.chat-message {
    margin-bottom: 16px;
}

.chat-message.user {
    text-align: right;
}

.chat-text {
    display: inline-block;
    padding: 12px 20px;
    border-radius: 12px;
    max-width: 80%;
}

.chat-message.user .chat-text {
    background: var(--primary-blue);
    color: #fff;
}

.chat-message.ai .chat-text {
    background: rgba(255, 255, 255, 0.15);
    color: #fff;
}

.ai-tags {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 16px;
}

.ai-tag {
    padding: 8px 20px;
    background: rgba(108, 92, 231, 0.3);
    border-radius: 20px;
    font-size: 14px;
    color: #fff;
}

.ai-cta {
    text-align: center;
}

/* 客户信任 */
.trust {
    background: #fff;
}

.logo-wall {
    margin-bottom: 60px;
}

.logo-row {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 40px;
    margin-bottom: 24px;
}

.client-logo {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-body);
    padding: 16px 32px;
    background: #f8f9fa;
    border-radius: 8px;
}

.case-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    margin-bottom: 40px;
}

.case-card {
    padding: 32px;
    background: #f8f9fa;
    border-radius: 16px;
    transition: all 0.3s ease;
}

.case-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

.case-card h3 {
    font-size: 22px;
    color: var(--text-title);
    margin-bottom: 12px;
}

.case-card p {
    font-size: 15px;
    color: var(--text-body);
    margin-bottom: 16px;
}

.case-stat {
    display: inline-block;
    padding: 6px 16px;
    background: var(--gradient-primary);
    color: #fff;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
}

.trust-cta {
    text-align: center;
}

/* 安全合规 */
.security {
    background: #f8f9fa;
}

.security-badges {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 40px;
    margin-bottom: 32px;
}

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

.badge-icon {
    font-size: 48px;
}

.badge-text {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-title);
}

.security-features {
    text-align: center;
    margin-bottom: 32px;
}

.security-features p {
    font-size: 18px;
    color: var(--text-body);
}

.security-cta {
    text-align: center;
}

/* 生态开放 */
.ecosystem {
    background: #fff;
}

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

.eco-text .section-title {
    text-align: left;
}

.eco-desc {
    font-size: 18px;
    color: var(--text-body);
    margin-bottom: 32px;
    line-height: 1.8;
}

.eco-cta {
    display: flex;
    gap: 16px;
}

.eco-visual {
    display: flex;
    justify-content: center;
}

.app-icons {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.app-icon {
    padding: 20px 32px;
    background: #f8f9fa;
    border-radius: 12px;
    text-align: center;
    font-weight: 600;
    color: var(--text-title);
}

/* 下载引导 */
.download-cta {
    background: var(--gradient-primary);
    text-align: center;
}

.download-buttons {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 24px;
    margin-bottom: 32px;
}

.download-btn {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 32px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 12px;
    color: #fff;
    transition: all 0.3s ease;
}

.download-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
}

.download-icon {
    font-size: 24px;
}

.download-text {
    font-size: 16px;
    font-weight: 600;
}

.web-version {
    margin-top: 24px;
}

.link-web {
    color: #fff;
    text-decoration: underline;
}

/* 常见问题 */
.faq {
    background: #fff;
}

.faq-list {
    max-width: 900px;
    margin: 0 auto;
}

.faq-item {
    margin-bottom: 32px;
    padding: 32px;
    background: #f8f9fa;
    border-radius: 12px;
}

.faq-question {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-title);
    margin-bottom: 16px;
}

.faq-answer p {
    font-size: 15px;
    color: var(--text-body);
    line-height: 1.8;
}

/* 页脚 */
.footer {
    background: #1a1a1a;
    color: #fff;
    padding: 60px 0 30px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 32px;
    margin-bottom: 40px;
}

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

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

.footer-col ul li a {
    font-size: 14px;
    color: #999;
}

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

.social-links {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.social-icon {
    font-size: 14px;
    color: #999;
}

.social-icon:hover {
    color: #fff;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 30px;
    border-top: 1px solid #333;
}

.footer-info p {
    font-size: 13px;
    color: #666;
    margin-bottom: 8px;
}

.footer-links a {
    font-size: 14px;
    color: #999;
}

.footer-links a:hover {
    color: #fff;
}

/* 响应式设计 */
@media (max-width: 1280px) {
    .container {
        max-width: 100%;
        padding: 0 32px;
    }
}

@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-visual {
        display: none;
    }
    
    .products-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .case-cards {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .eco-content {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

@media (max-width: 768px) {
    .header-inner {
        height: 60px;
    }
    
    .main-nav {
        display: none;
    }
    
    .hero-title {
        font-size: 36px;
    }
    
    .hero-subtitle {
        font-size: 16px;
    }
    
    .hero-cta {
        flex-direction: column;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .products-grid {
        grid-template-columns: 1fr;
    }
    
    .solutions-grid {
        grid-template-columns: 1fr;
    }
    
    .case-cards {
        grid-template-columns: 1fr;
    }
    
    .download-buttons {
        flex-direction: column;
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 28px;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
    }
}