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

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

/* 色彩体系 */
:root {
    --primary-color: #1E3A8A;
    --secondary-color: #2563EB;
    --accent-color: #2563EB;
    --bg-light: #F5F5F5;
    --text-primary: #333;
    --text-secondary: #666;
    --text-light: #999;
    --border-color: #E5E7EB;
}

/* 字体层级 */
h1 { font-size: 24px; font-weight: bold; }
h2 { font-size: 20px; font-weight: bold; }
h3 { font-size: 16px; font-weight: 500; }
p { font-size: 14px; line-height: 1.6; }
.small-text { font-size: 12px; color: var(--text-light); }

/* 通用容器 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* 按钮样式 */
.cta-button {
    background-color: var(--accent-color);
    color: white;
    border: none;
    padding: 12px 32px;
    font-size: 16px;
    font-weight: 500;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.3s ease;
    height: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.cta-button:hover {
    background-color: #1D4ED8;
}

.copy-button {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 8px 16px;
    font-size: 14px;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.3s ease;
    margin-left: 12px;
}

.copy-button:hover {
    background-color: #1E40AF;
}

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: #fff;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    z-index: 1000;
    transition: all 0.3s ease;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 60px;
}

.nav-logo img {
    width: 120px;
    display: block;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 32px;
}

.nav-link {
    text-decoration: none;
    color: var(--text-primary);
    font-size: 14px;
    font-weight: 500;
    transition: color 0.3s ease;
    cursor: pointer;
}

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

.nav-link.active {
    color: var(--accent-color);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, rgba(30, 58, 138, 0.9) 0%, rgba(37, 99, 235, 0.8) 100%), url('../assets/img/hero-bg.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    color: white;
    padding: 120px 0 80px;
    text-align: center;
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.hero-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 24px;
}

.hero-title {
    font-size: 24px;
    font-weight: bold;
    margin-bottom: 16px;
    line-height: 1.4;
}

.hero-subtitle {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 32px;
    line-height: 1.5;
}

/* 合作模式 */
.cooperation {
    padding: 80px 0;
    background-color: var(--bg-light);
}

.section-title {
    text-align: center;
    font-size: 20px;
    font-weight: bold;
    color: var(--primary-color);
    margin-bottom: 48px;
}

.cooperation-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 32px;
    margin-top: 48px;
}

.cooperation-item {
    text-align: center;
    padding: 32px 24px;
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
}

.cooperation-item:hover {
    transform: translateY(-4px);
}

.cooperation-icon {
    color: var(--accent-color);
    margin-bottom: 16px;
    display: flex;
    justify-content: center;
}

.cooperation-item h3 {
    font-size: 16px;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.cooperation-item p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* 价值流程 */
.process {
    padding: 80px 0;
    background-color: white;
}

.process-steps {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1000px;
    margin: 0 auto;
    gap: 24px;
}

.process-step {
    flex: 1;
    text-align: center;
    padding: 24px;
}

.process-step p {
   height: 90px;
}

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

.process-step h3 {
    font-size: 16px;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.process-step p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
}

.process-arrow {
    font-size: 24px;
    color: var(--accent-color);
    font-weight: bold;
}

/* 合作优势 */
.advantages {
    padding: 80px 0;
    background-color: var(--bg-light);
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 48px;
    margin-top: 48px;
}

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

.advantage-icon {
    color: var(--accent-color);
    margin-bottom: 16px;
    display: flex;
    justify-content: center;
}

.advantage-item h3 {
    font-size: 16px;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.advantage-item p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* 常见问题 */
.faq {
    padding: 80px 0;
    background-color: white;
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    margin-bottom: 16px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
}

.faq-question {
    padding: 20px 24px;
    background-color: white;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background-color 0.3s ease;
}

.faq-question:hover {
    background-color: var(--bg-light);
}

.faq-question h3 {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
    margin: 0;
}

.faq-icon {
    font-size: 20px;
    color: var(--accent-color);
    transition: transform 0.3s ease;
}

.faq-answer {
    padding: 0 24px;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.25s ease, padding 0.25s ease;
    will-change: max-height;
    background-color: var(--bg-light);
}

.faq-answer.active {
    padding: 20px 24px;
}

.faq-answer p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 0;
}

/* 联系我们 */
.contact {
    padding: 80px 0;
    background-color: var(--primary-color);
    color: white;
    text-align: center;
}

.contact .section-title {
    color: white;
}

.contact-description {
    font-size: 16px;
    margin-bottom: 32px;
    color: rgba(255, 255, 255, 0.9);
}

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

.email-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: white;
    text-decoration: none;
    font-size: 18px;
    font-weight: 500;
    padding: 12px 24px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    transition: background-color 0.3s ease;
}

.email-link:hover {
    background-color: rgba(255, 255, 255, 0.2);
}

/* 页脚 */
.footer {
    background-color: #1F2937;
    color: white;
    padding: 40px 0;
}

.footer-content {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 24px;
}

.footer-info p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.8);
    margin: 0;
}

.footer-links {
    display: flex;
    gap: 24px;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: white;
}

/* 响应式导航按钮 */
.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--text-primary);
    margin: 4px 0;
    transition: all 0.3s ease;
}