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

html {
    scroll-behavior: smooth;
}

:root {
    --primary-color: #0088cc;
    --secondary-color: #64b5f6;
    --light-bg: #ffffff;
    --lighter-bg: #f8f9fa;
    --card-bg: #ffffff;
    --text-primary: #1a1a1a;
    --text-secondary: #6b7280;
    --border-color: #e5e7eb;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica', 'Arial', sans-serif;
    background-color: var(--light-bg);
    color: var(--text-primary);
    line-height: 1.6;
}

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

/* 导航栏 */
.navbar {
    background-color: var(--light-bg);
    padding: 20px 0;
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 20px;
    font-weight: 700;
    color: var(--primary-color);
}

.logo svg {
    flex-shrink: 0;
}

.nav-cta {
    background-color: var(--primary-color);
    color: white;
    padding: 8px 20px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    font-size: 14px;
    transition: all 0.3s;
}

.nav-cta:hover {
    background-color: #006699;
    transform: translateY(-2px);
}

/* 首屏 */
.hero {
    padding: 120px 0;
    text-align: center;
    background: linear-gradient(135deg, #f0f4ff 0%, #ffffff 100%);
}

.hero h1 {
    font-size: 56px;
    font-weight: 800;
    margin-bottom: 24px;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 20px;
    color: var(--text-secondary);
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

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

/* 按钮样式 */
.btn {
    padding: 14px 32px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    font-size: 16px;
    transition: all 0.3s;
    display: inline-block;
}

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

.btn-primary:hover {
    background-color: #006699;
    transform: translateY(-2px);
    box-shadow: 0 8px 16px rgba(0, 136, 204, 0.3);
}

.btn-secondary {
    background-color: transparent;
    color: var(--text-primary);
    border: 2px solid var(--border-color);
}

.btn-secondary:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

/* 功能特性 */
.features {
    padding: 80px 0;
    background-color: var(--lighter-bg);
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 32px;
}

.feature-item {
    text-align: center;
    padding: 32px;
    background-color: var(--card-bg);
    border-radius: 12px;
    border: 1px solid var(--border-color);
    transition: all 0.3s;
}

.feature-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
    border-color: var(--primary-color);
}

.feature-icon {
    font-size: 48px;
    margin-bottom: 16px;
}

.feature-item h3 {
    font-size: 20px;
    margin-bottom: 12px;
}

.feature-item p {
    color: var(--text-secondary);
    font-size: 14px;
}

/* 案例展示 */
.cases {
    padding: 80px 0;
    background-color: var(--light-bg);
}

.cases h2, .process h2, .trust h2, .cta-section h2 {
    text-align: center;
    font-size: 40px;
    margin-bottom: 16px;
}

.section-subtitle {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 48px;
    font-size: 18px;
}

.case-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 32px;
    margin-top: 48px;
}

.case-item {
    background-color: var(--card-bg);
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    transition: all 0.3s;
}

.case-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.12);
    border-color: var(--primary-color);
}

.case-image {
    width: 100%;
    height: 200px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
}

.case-placeholder {
    font-size: 24px;
    font-weight: 700;
    color: white;
}

.case-item h3 {
    padding: 24px 24px 12px;
    font-size: 22px;
}

.case-item > p {
    padding: 0 24px;
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.6;
}

.case-tags {
    padding: 16px 24px;
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.tag {
    background-color: var(--lighter-bg);
    color: var(--text-secondary);
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 12px;
    border: 1px solid var(--border-color);
}

.case-link {
    display: block;
    padding: 16px 24px 24px;
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
}

.case-link:hover {
    color: var(--secondary-color);
}

/* 开发流程 */
.process {
    padding: 80px 0;
    background-color: var(--lighter-bg);
}

.process-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 32px;
    margin-top: 48px;
}

.step {
    text-align: center;
}

.step-number {
    width: 60px;
    height: 60px;
    background-color: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: 700;
    margin: 0 auto 16px;
}

.step h3 {
    font-size: 20px;
    margin-bottom: 8px;
}

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

/* 信任背书 */
.trust {
    padding: 80px 0;
    background-color: var(--light-bg);
}

.trust-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 32px;
    margin-top: 48px;
}

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

.trust-number {
    font-size: 48px;
    font-weight: 800;
    color: var(--primary-color);
    margin-bottom: 8px;
}

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

/* CTA区域 */
.cta-section {
    padding: 100px 0;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    text-align: center;
}

.cta-section h2 {
    font-size: 40px;
    margin-bottom: 16px;
}

.cta-section p {
    font-size: 18px;
    margin-bottom: 32px;
    opacity: 0.9;
}

.contact-methods {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.cta-section .btn-primary {
    background-color: white;
    color: var(--primary-color);
}

.cta-section .btn-primary:hover {
    background-color: #f0f0f0;
}

.cta-section .btn-secondary {
    border-color: white;
    color: white;
}

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

/* 页脚 */
.footer {
    background-color: var(--lighter-bg);
    padding: 32px 0;
    text-align: center;
    border-top: 1px solid var(--border-color);
}

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

/* 响应式设计 */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 36px;
    }
    
    .hero-subtitle {
        font-size: 16px;
    }
    
    .cases h2, .process h2, .trust h2, .cta-section h2 {
        font-size: 32px;
    }
    
    .feature-grid,
    .case-grid,
    .process-steps,
    .trust-grid {
        grid-template-columns: 1fr;
    }
}