/* 通用样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --accent-color: #06b6d4;
    --dark-bg: #0f172a;
    --light-bg: #f8fafc;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
    line-height: 1.7;
    color: var(--text-primary);
    overflow-x: hidden;
}

html {
    scroll-behavior: smooth;
}

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

.section-title {
    text-align: center;
    font-size: 2.2rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
    position: relative;
}

.section-desc {
    text-align: center;
    color: var(--text-secondary);
    font-size: 1.1rem;
    max-width: 700px;
    margin: 0 auto 3rem;
}

/* 头部导航 */
.header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0,0,0,0.08);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 20px;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav {
    display: flex;
    gap: 1.5rem;
}

.nav-link {
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 500;
    font-size: 0.95rem;
    transition: all 0.3s;
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    transition: width 0.3s;
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

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

/* 首页横幅 */
.hero {
    background: linear-gradient(135deg, #1e1b4b 0%, #312e81 50%, #4338ca 100%);
    color: #fff;
    padding: 7rem 20px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 20% 50%, rgba(99, 102, 241, 0.3) 0%, transparent 50%),
                radial-gradient(circle at 80% 80%, rgba(6, 182, 212, 0.2) 0%, transparent 50%);
    pointer-events: none;
}

.hero .container {
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 2.8rem;
    margin-bottom: 1rem;
    font-weight: 700;
}

.hero-subtitle {
    font-size: 1.6rem;
    margin-bottom: 1rem;
    font-weight: 600;
    background: linear-gradient(90deg, var(--primary-light), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-desc {
    font-size: 1.1rem;
    opacity: 0.9;
    max-width: 800px;
    margin: 0 auto 2rem;
}

.hero-tags {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.hero-tags .tag {
    background: rgba(255,255,255,0.15);
    backdrop-filter: blur(10px);
    padding: 0.5rem 1.2rem;
    border-radius: 20px;
    font-size: 0.9rem;
    border: 1px solid rgba(255,255,255,0.2);
}

/* 关于我们 */
.about {
    padding: 6rem 20px;
    background: #fff;
}

.about-content {
    max-width: 900px;
    margin: 0 auto;
}

.about-text p {
    margin-bottom: 1.5rem;
    color: var(--text-secondary);
    font-size: 1.1rem;
    text-align: justify;
}

/* 五个坚持 */
.philosophy {
    padding: 6rem 20px;
    background: var(--light-bg);
}

.principles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.principle-card {
    background: #fff;
    padding: 2rem;
    border-radius: 16px;
    box-shadow: 0 4px 30px rgba(0,0,0,0.08);
    transition: all 0.3s;
    border: 1px solid rgba(99, 102, 241, 0.1);
}

.principle-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 8px 40px rgba(99, 102, 241, 0.15);
}

.principle-number {
    font-size: 2.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
}

.principle-card h3 {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.principle-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* 服务对象 */
.services {
    padding: 6rem 20px;
    background: #fff;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.service-card {
    background: linear-gradient(145deg, #fff, #f8fafc);
    padding: 2rem;
    border-radius: 16px;
    text-align: center;
    box-shadow: 0 4px 20px rgba(0,0,0,0.06);
    transition: all 0.3s;
    border: 1px solid rgba(99, 102, 241, 0.1);
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(99, 102, 241, 0.15);
}

.service-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.service-card h3 {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.service-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.service-more {
    text-align: center;
    padding: 2rem;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.08), rgba(6, 182, 212, 0.08));
    border-radius: 12px;
}

.service-more h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.service-more .more-desc {
    color: var(--text-secondary);
    line-height: 1.8;
}

/* FAQ常见问题 */
.faq {
    padding: 6rem 20px;
    background: var(--light-bg);
}

.faq-list {
    display: grid;
    gap: 1.5rem;
    max-width: 900px;
    margin: 0 auto;
}

.faq-item {
    background: #fff;
    padding: 2rem;
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.06);
    transition: all 0.3s;
    border: 1px solid rgba(99, 102, 241, 0.1);
}

.faq-item:hover {
    box-shadow: 0 8px 30px rgba(99, 102, 241, 0.12);
    border-color: rgba(99, 102, 241, 0.2);
}

.faq-item h3 {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    color: var(--primary-dark);
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
}

.faq-item h3::before {
    content: "Q.";
    font-weight: 700;
    color: var(--primary-color);
    flex-shrink: 0;
}

.faq-item p {
    color: var(--text-secondary);
    line-height: 1.8;
    font-size: 1rem;
}

/* 合作模式 */
.cooperation {
    padding: 6rem 20px;
    background: var(--light-bg);
}

.cooperation-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.cooperation-card {
    background: #fff;
    padding: 2.5rem 2rem;
    border-radius: 16px;
    box-shadow: 0 4px 30px rgba(0,0,0,0.08);
    transition: all 0.3s;
    border: 1px solid rgba(99, 102, 241, 0.1);
}

.cooperation-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 40px rgba(99, 102, 241, 0.15);
}

.coop-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.cooperation-card h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.cooperation-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* 愿景与价值观 */
.values {
    padding: 6rem 20px;
    background: linear-gradient(135deg, #1e1b4b 0%, #312e81 100%);
    color: #fff;
}

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

.values-grid {
    display: grid;
    gap: 2rem;
    max-width: 900px;
    margin: 0 auto;
}

.value-item {
    text-align: center;
    padding: 2rem;
    background: rgba(255,255,255,0.1);
    backdrop-filter: blur(10px);
    border-radius: 16px;
    border: 1px solid rgba(255,255,255,0.15);
}

.value-label {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: var(--primary-light);
}

.value-text {
    color: rgba(255,255,255,0.9);
    font-size: 1.05rem;
}

/* 联系方式 */
.contact {
    padding: 6rem 20px;
    background: #fff;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.contact-item {
    display: flex;
    gap: 1rem;
    padding: 1.2rem;
    background: var(--light-bg);
    border-radius: 12px;
    transition: all 0.3s;
}

.contact-item:hover {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.08), rgba(6, 182, 212, 0.08));
}

.contact-item .icon {
    font-size: 1.8rem;
    flex-shrink: 0;
}

.contact-item strong {
    display: block;
    margin-bottom: 0.3rem;
    color: var(--text-primary);
}

.contact-item p {
    color: var(--text-secondary);
}

.contact-cta {
    text-align: center;
    padding: 3rem 2rem;
    background: linear-gradient(135deg, #1e1b4b 0%, #312e81 100%);
    border-radius: 20px;
    color: #fff;
}

.contact-cta h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.contact-cta p {
    opacity: 0.9;
    margin-bottom: 1.5rem;
}

.qr-code-container {
    margin-top: 1.5rem;
}

.qr-code {
    width: 200px;
    height: auto;
    border-radius: 12px;
    border: 4px solid rgba(255,255,255,0.2);
    box-shadow: 0 8px 32px rgba(0,0,0,0.2);
}

.qr-hint {
    margin-top: 1rem;
    font-size: 0.95rem;
    opacity: 0.8;
}

/* 页脚 */
.footer {
    background: var(--dark-bg);
    color: #fff;
    text-align: center;
    padding: 3rem 20px;
}

.footer-logo {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, var(--primary-light), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-slogan {
    opacity: 0.8;
    margin-bottom: 1.5rem;
}

.footer p {
    margin: 0.5rem 0;
    opacity: 0.6;
    font-size: 0.9rem;
}

.footer-icp {
    margin-top: 0.8rem;
}

.footer-icp a {
    color: rgba(255,255,255,0.6);
    text-decoration: none;
    transition: opacity 0.3s;
}

.footer-icp a:hover {
    opacity: 1;
    color: var(--primary-light);
}

.footer-nav {
    margin-top: 1.5rem;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.footer-nav a {
    color: rgba(255,255,255,0.7);
    text-decoration: none;
    transition: color 0.3s;
}

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

.footer-nav span {
    opacity: 0.4;
}

/* 响应式设计 */
@media (max-width: 900px) {
    .contact-content {
        grid-template-columns: 1fr;
    }

    .nav {
        flex-wrap: wrap;
        justify-content: center;
    }
}

@media (max-width: 768px) {
    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1.3rem;
    }

    .hero-desc {
        font-size: 1rem;
    }

    .hero {
        padding: 4rem 20px;
    }

    .section-title {
        font-size: 1.8rem;
    }

    .header .container {
        flex-direction: column;
        gap: 1rem;
    }

    .nav {
        gap: 1rem;
    }

    .services-grid,
    .principles-grid,
    .cooperation-grid {
        grid-template-columns: 1fr;
    }

    .about-text p {
        font-size: 1rem;
    }
}