/* 全局重置与基础样式（和子页面保持一致） */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
}

:root {
    --primary-color: #165DFF;
    --primary-dark: #0E42D2;
    --secondary-color: #00B42A;
    --tech-blue: #00C0FF;
    --dark-bg: #0A101F;
    --card-bg: #111827;
    --text-primary: #FFFFFF;
    --text-secondary: #94A3B8;
    --text-muted: #64748B;
    --border-color: #1E293B;
    --shadow-lg: 0 8px 30px rgba(0,0,0,0.2);
    --radius: 12px;
    --transition: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
}

body {
    background-color: var(--dark-bg);
    color: var(--text-primary);
    line-height: 1.8;
    font-size: 16px;
    overflow-x: hidden;
    padding-top: 88px;
    -webkit-overflow-scrolling: touch;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

img {
    max-width: 100%;
    vertical-align: middle;
    display: inline-block;
}

.container {
    max-width: 1300px;
    margin: 0 auto;
    padding: 0 20px;
}

.section {
    padding: 100px 0;
}

.section-title {
    font-size: 40px;
    font-weight: 700;
    text-align: center;
    margin-bottom: 20px;
    background: linear-gradient(90deg, var(--primary-color), var(--tech-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    position: relative;
}

.section-subtitle {
    text-align: center;
    max-width: 750px;
    margin: 0 auto 60px;
    font-size: 18px;
    color: var(--text-secondary);
}

.section-title::after {
    content: "";
    position: absolute;
    bottom: -16px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--tech-blue));
    border-radius: 2px;
}

/* 按钮样式 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 15px 36px;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    font-size: 16px;
    min-width: 160px;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
}

.btn-primary {
    background: linear-gradient(90deg, var(--primary-color), var(--primary-dark));
    color: white;
    box-shadow: 0 6px 20px rgba(22, 93, 255, 0.3);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(22, 93, 255, 0.4);
}

.btn-secondary {
    background-color: transparent;
    border: 1px solid var(--primary-color);
    color: var(--primary-color);
}

.btn-secondary:hover {
    background-color: rgba(22, 93, 255, 0.1);
}

/* 导航栏样式（和子页面一致） */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(10, 16, 31, 0.9);
    backdrop-filter: blur(10px);
    z-index: 9999;
    padding: 16px 0;
    transition: var(--transition);
    border-bottom: 1px solid rgba(22, 93, 255, 0.1);
    will-change: padding;
}

.navbar.scroll {
    padding: 8px 0;
    background-color: rgba(10, 16, 31, 0.98);
}

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

.logo {
    font-size: 28px;
    font-weight: 800;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    white-space: nowrap;
}

.desktop-cta {
    display: flex;
    gap: 15px;
    margin-left: auto;
}

.nav-links {
    display: flex;
    gap: 40px;
    align-items: center;
    padding-left: 50px;
}

.nav-links a {
    font-size: 17px;
    color: var(--text-secondary);
    font-weight: 500;
    position: relative;
    -webkit-tap-highlight-color: transparent;
}

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

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

.hamburger {
    display: none;
    cursor: pointer;
    color: var(--text-primary);
    z-index: 10000;
    -webkit-tap-highlight-color: transparent;
    font-size: 24px;
}

/* 移动端菜单（和子页面一致） */
.mobile-menu {
    display: none;
    background-color: var(--dark-bg);
    border-top: 1px solid var(--border-color);
    padding: 20px 0;
    width: 100%;
    box-shadow: 0 8px 20px rgba(0,0,0,0.15);
    position: relative;
    z-index: 9999;
}

.mobile-menu.show {
    display: block !important;
}

.mobile-menu .container {
    display: flex;
    gap: 20px;
    justify-content: space-evenly;
    align-items: stretch;
}

.mobile-nav-links {
    display: flex;
    flex-direction: column;
    gap: 20px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
}

.mobile-nav-links a {
    font-size: 18px;
    color: var(--text-primary);
    padding: 10px 0;
    -webkit-tap-highlight-color: transparent;
}

.mobile-nav-links a.active {
    color: var(--primary-color);
    font-weight: 600;
}

.mobile-cta {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.mobile-cta .btn {
    width: 100%;
}

/* 英雄区（首页核心视觉） */
.hero {
    min-height: calc(100vh - 88px);
    background: radial-gradient(circle at top right, #111827 0%, #0A101F 100%);
    display: flex;
    align-items: center;
    position: relative;
    padding: 60px 0;
    overflow: hidden;
}

.hero::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 70% 30%, rgba(22, 93, 255, 0.1), transparent 70%);
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    display: flex;
    align-items: center;
    gap: 60px;
    width: 100%;
}

.hero-left {
    flex: 1;
}

.hero-tagline {
    font-size: 20px;
    color: var(--tech-blue);
    margin-bottom: 20px;
    font-weight: 500;
}

.hero-title {
    font-size: 58px;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 30px;
}

.hero-title span {
    background: linear-gradient(90deg, var(--primary-color), var(--tech-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-desc {
    font-size: 20px;
    line-height: 1.8;
    margin-bottom: 40px;
    color: var(--text-secondary);
}

.hero-cta {
    display: flex;
    gap: 25px;
    flex-wrap: wrap;
    margin-bottom: 60px;
}

.hero-trust {
    margin-top: 40px;
}

.trust-label {
    font-size: 16px;
    color: var(--text-muted);
    margin-bottom: 15px;
}

.trust-logos {
    display: flex;
    gap: 20px;
    align-items: center;
    flex-wrap: wrap;
}

.trust-logos img {
    opacity: 0.8;
    transition: var(--transition);
}

.trust-logos img:hover {
    opacity: 1;
    transform: scale(1.05);
}

.hero-right {
    flex: 1;
    display: flex;
    justify-content: center;
}

.hero-img {
    max-width: 100%;
    animation: float 6s ease-in-out infinite;
}

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

.wave-bottom {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 60px;
    background: url("data:image/svg+xml;base64,PHN2ZyB3aWR0aD0iMTAwJSIgaGVpZ2h0PSI2MCIgdmlld0JveD0iMCAwIDEwMCAtNjAiIGZpbGw9IiMwYTEwMWYiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyI+PGcgZmlsbC1ydWxlPSJldmVub2RkIj48cGF0aCBkPSJNLTAsNjBIMTAwQzEwMCwzMCA1MCwwIC0wLDYwWiIgZmlsbD0ibm9uZSIvPjwvZz48L3N2Zz4=") repeat-x;
    background-size: 100% 100%;
    z-index: 2;
}

/* 核心优势 */
.advantages {
    background-color: var(--dark-bg);
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.advantage-card {
    padding: 45px 35px;
    background-color: var(--card-bg);
    border-radius: var(--radius);
    transition: var(--transition);
    border: 1px solid var(--border-color);
    height: 100%;
    text-align: center;
}

.advantage-card:hover {
    transform: translateY(-8px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-lg);
}

.advantage-icon {
    margin-bottom: 25px;
    display: inline-block;
}

.advantage-title {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.advantage-desc {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.8;
}

/* 核心产品 */
.products {
    background-color: var(--dark-bg);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.product-card {
    background-color: var(--card-bg);
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
    overflow: hidden;
    transition: var(--transition);
    height: 100%;
    display: flex;
    flex-direction: column;
}

.product-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-lg);
}

.product-header {
    padding: 30px;
    background: linear-gradient(135deg, rgba(22,93,255,0.1), transparent);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 15px;
}

.product-icon {
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: rgba(22, 93, 255, 0.1);
    border-radius: 10px;
}

.product-title {
    font-size: 24px;
    font-weight: 600;
}

.product-desc {
    padding: 30px;
    flex: 1;
}

.product-desc p {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.8;
}

.product-features {
    padding: 0 30px 20px;
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.feature-item {
    font-size: 14px;
    color: var(--tech-blue);
    background-color: rgba(0, 192, 255, 0.1);
    padding: 6px 12px;
    border-radius: 6px;
}

.product-cta {
    padding: 20px 30px;
    border-top: 1px solid var(--border-color);
    text-align: center;
    margin-top: auto;
}

/* 适用行业 */
.industries {
    background-color: var(--dark-bg);
}

.industries-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 25px;
}

.industry-card {
    background-color: var(--card-bg);
    border-radius: var(--radius);
    padding: 35px 25px;
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.industry-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
}

.industry-icon {
    margin-bottom: 20px;
}

.industry-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 12px;
}

.industry-desc {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.7;
}

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

.cases-slider {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.case-card {
    background-color: var(--card-bg);
    border-radius: var(--radius);
    padding: 35px;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

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

.case-logo {
    margin-bottom: 20px;
}

.case-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--primary-color);
}

.case-desc {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.8;
}

.case-desc p {
    margin-bottom: 10px;
}

/* 为什么选择我们 */
.why-us {
    background-color: var(--dark-bg);
}

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

.comparison-item {
    background-color: var(--card-bg);
    border-radius: var(--radius);
    padding: 35px 25px;
    text-align: center;
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.comparison-item:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
}

.comparison-icon {
    margin-bottom: 20px;
    display: inline-block;
}

.comparison-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 12px;
}

.comparison-desc {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* 行动召唤 */
.cta {
    background: linear-gradient(135deg, #0A101F, #111827);
    padding: 110px 0;
    text-align: center;
    position: relative;
    border-top: 1px solid rgba(22, 93, 255, 0.1);
}

.cta-content {
    max-width: 750px;
    margin: 0 auto;
}

.cta-title {
    font-size: 40px;
    font-weight: 700;
    margin-bottom: 25px;
}

.cta-desc {
    font-size: 19px;
    margin-bottom: 45px;
    color: var(--text-secondary);
}

.cta-actions {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

/* 联系我们 */
.contact {
    background-color: var(--dark-bg);
}

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

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.contact-item {
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.contact-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: rgba(22, 93, 255, 0.1);
    border-radius: 8px;
    flex-shrink: 0;
}

.contact-content h4 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
}

.contact-content p {
    font-size: 16px;
    color: var(--text-secondary);
}

.contact-form {
    background-color: var(--card-bg);
    border-radius: var(--radius);
    padding: 40px;
    border: 1px solid var(--border-color);
}

.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    font-size: 16px;
    font-weight: 500;
    margin-bottom: 10px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 15px;
    background-color: var(--dark-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 16px;
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(22, 93, 255, 0.1);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-muted);
}

.form-submit {
    width: 100%;
    padding: 16px;
    font-size: 18px;
}

/* 页脚（和子页面一致） */
.footer {
    background-color: #070D1A;
    color: var(--text-primary);
    padding: 90px 0 40px;
    border-top: 1px solid var(--border-color);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 50px;
    margin-bottom: 70px;
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.footer-logo {
    font-size: 28px;
    font-weight: 800;
    color: var(--primary-color);
    display: flex;
    align-items: center;
}

.footer-desc {
    color: var(--text-secondary);
    font-size: 16px;
    line-height: 1.8;
}

.footer-title {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 25px;
    position: relative;
    padding-bottom: 12px;
    color: var(--text-primary);
}

.footer-title::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    width: 45px;
    height: 3px;
    background-color: var(--primary-color);
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.footer-links a {
    color: var(--text-secondary);
    font-size: 16px;
    transition: var(--transition);
    -webkit-tap-highlight-color: transparent;
}

.footer-links a:hover {
    color: var(--primary-color);
    padding-left: 6px;
}

.footer-contact {
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.footer-contact .contact-item {
    display: flex;
    align-items: center;
    gap: 15px;
    color: var(--text-secondary);
    font-size: 16px;
}

.copyright {
    text-align: center;
    padding-top: 35px;
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: 15px;
}

.copyright a {
    color: var(--primary-color);
}

/* 响应式适配 */
@media (max-width: 1200px) {
    .hero-title { font-size: 48px; }
    .advantages-grid { grid-template-columns: repeat(2, 1fr); }
    .industries-grid { grid-template-columns: repeat(2, 1fr); }
    .comparison-grid { grid-template-columns: repeat(2, 1fr); }
    .cases-slider { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 992px) {
    .hero-content { flex-direction: column; text-align: center; gap: 40px; }
    .hero-left { width: 100%; }
    .hero-right { width: 100%; }
    .hero-cta { justify-content: center; }
    .trust-logos { justify-content: center; }
    
    .section { padding: 80px 0; }
    .section-title { font-size: 34px; }
    
    .products-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 40px; }
    .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    .nav-links { display: none; }
    .desktop-cta { display: none; }
    .hamburger { display: block; }
    
    body { padding-top: 72px; }
    .hero { min-height: auto; padding: 40px 0; }
    .hero-title { font-size: 38px; }
    
    .advantages-grid, .industries-grid, .cases-slider, .comparison-grid { grid-template-columns: 1fr; }
    .products-grid { grid-template-columns: 1fr; }
    
    .cta-title { font-size: 34px; }
    .footer-grid { grid-template-columns: 1fr; }
}

@media (max-width: 576px) {
    .logo { font-size: 24px; }
    .hero-title { font-size: 32px; }
    .hero-desc { font-size: 16px; }
    .hero-cta { flex-direction: column; gap: 15px; }
    .btn { width: 100%; }
    
    .section-title { font-size: 28px; }
    .contact-form { padding: 25px; }
    
    .footer { padding: 60px 0 20px; }
}

/* 滚动条美化 */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--dark-bg);
}

::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-dark);
}

/* 修复Safari平滑滚动 */
@supports (-webkit-touch-callout: none) {
    html {
        scroll-behavior: auto !important;
    }
}

/* 用户案例板块样式 */
.cases {
    background-color: var(--dark-bg);
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-bottom: 60px;
}

.case-card {
    background-color: var(--card-bg);
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
    overflow: hidden;
    transition: var(--transition);
    height: 100%;
}

.case-card:hover {
    transform: translateY(-8px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-lg);
}

.case-header {
    padding: 30px;
    background: linear-gradient(135deg, rgba(22, 93, 255, 0.1), rgba(0, 192, 255, 0.1));
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
}

.case-logo {
    width: 80px;
    height: 80px;
    background-color: var(--dark-bg);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.case-badge {
    padding: 8px 20px;
    background-color: var(--primary-color);
    color: white;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
}

.case-content {
    padding: 30px;
}

.case-title {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--primary-color);
}

.case-challenge, .case-solution, .case-result {
    margin-bottom: 20px;
}

.case-challenge h4, .case-solution h4, .case-result h4 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.case-challenge h4::before, .case-solution h4::before, .case-result h4::before {
    content: "";
    width: 4px;
    height: 20px;
    background-color: var(--primary-color);
    border-radius: 2px;
}

.case-challenge p, .case-solution p {
    color: var(--text-secondary);
    line-height: 1.8;
}

.case-result ul {
    list-style: none;
    color: var(--text-secondary);
}

.case-result li {
    margin-bottom: 8px;
    padding-left: 24px;
    position: relative;
    line-height: 1.6;
}

.case-result li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--secondary-color);
    font-weight: 700;
}

.cases-cta {
    display: flex;
    justify-content: center;
    gap: 25px;
    flex-wrap: wrap;
}

/* 响应式适配 */
@media (max-width: 1200px) {
    .cases-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .cases-grid {
        grid-template-columns: 1fr;
    }
    
    .case-header {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }
    
    .cases-cta {
        flex-direction: column;
        gap: 15px;
    }
    
    .cases-cta .btn {
        width: 100%;
    }
}