/* ===== 全局重置 & 变量 ===== */
:root {
    --primary: #6c5ce7;
    --primary-dark: #5a4bd1;
    --primary-light: #a29bfe;
    --bg: #ffffff;
    --bg-alt: #f8f9ff;
    --text: #1a1a2e;
    --text-muted: #6b7280;
    --border: #e5e7eb;
    --shadow: 0 10px 30px -5px rgba(108, 92, 231, 0.15);
    --radius: 20px;
    --radius-sm: 12px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --font: 'Inter', -apple-system, sans-serif;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font);
    color: var(--text);
    background: var(--bg);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    display: block;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 12px;
    background: linear-gradient(135deg, var(--primary), #e17055);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-header p {
    font-size: 1.1rem;
    color: var(--text-muted);
}

/* ===== 按钮 ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.95rem;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
}

.btn-primary {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 8px 20px rgba(108, 92, 231, 0.3);
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 12px 28px rgba(108, 92, 231, 0.4);
}

.btn-outline {
    background: transparent;
    border-color: var(--border);
    color: var(--text);
}

.btn-outline:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: rgba(108, 92, 231, 0.05);
}

.btn-sm {
    padding: 8px 18px;
    font-size: 0.85rem;
}

.btn-block {
    width: 100%;
    justify-content: center;
}

/* ===== 导航栏 ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid transparent;
    transition: var(--transition);
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.95);
    border-bottom-color: var(--border);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
}

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

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-menu ul {
    display: flex;
    gap: 8px;
}

.nav-menu a {
    padding: 8px 16px;
    border-radius: 50px;
    font-weight: 500;
    color: var(--text-muted);
    transition: var(--transition);
    font-size: 0.95rem;
}

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--primary);
    background: rgba(108, 92, 231, 0.08);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text);
    cursor: pointer;
    padding: 8px;
}

/* ===== Hero ===== */
.hero {
    padding: 140px 0 80px;
    background: linear-gradient(135deg, #f8f9ff 0%, #eef0ff 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
}

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

.hero-content .badge {
    display: inline-block;
    padding: 4px 16px;
    background: rgba(108, 92, 231, 0.12);
    color: var(--primary);
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 20px;
}

.hero-content h1 {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 20px;
}

.gradient-text {
    background: linear-gradient(135deg, var(--primary), #e17055);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-content p {
    font-size: 1.15rem;
    color: var(--text-muted);
    margin-bottom: 32px;
    max-width: 480px;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.hero-stats {
    display: flex;
    gap: 32px;
}

.hero-stats div {
    font-size: 0.95rem;
    color: var(--text-muted);
}

.hero-stats strong {
    display: block;
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text);
}

.hero-visual {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.hero-card {
    background: #fff;
    border-radius: var(--radius);
    padding: 28px 32px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    position: relative;
    border: 1px solid rgba(108, 92, 231, 0.08);
}

.hero-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 40px rgba(108, 92, 231, 0.2);
}

.hero-card i {
    font-size: 2rem;
    color: var(--primary);
    margin-bottom: 12px;
}

.hero-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 6px;
}

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

.hero-card .tag {
    position: absolute;
    top: 16px;
    right: 16px;
    background: var(--primary);
    color: #fff;
    padding: 2px 12px;
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 600;
}

.card-alt {
    align-self: flex-end;
    width: 80%;
}

.hero-decoration {
    position: absolute;
    top: -20px;
    right: -20px;
    width: 200px;
    height: 200px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(108, 92, 231, 0.1), transparent);
    z-index: -1;
}

/* ===== 服务 ===== */
.services {
    background: var(--bg);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 28px;
}

.service-card {
    background: #fff;
    border-radius: var(--radius);
    padding: 36px 28px;
    border: 1px solid var(--border);
    transition: var(--transition);
}

.service-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow);
    border-color: var(--primary-light);
}

.service-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 16px;
    background: rgba(108, 92, 231, 0.1);
    font-size: 1.6rem;
    color: var(--primary);
    margin-bottom: 20px;
}

.service-card h3 {
    font-size: 1.2rem;
    margin-bottom: 12px;
}

.service-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-bottom: 16px;
}

.card-link {
    color: var(--primary);
    font-weight: 600;
    font-size: 0.9rem;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

/* ===== 产品 ===== */
.products {
    background: var(--bg-alt);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 28px;
}

.product-card {
    background: #fff;
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--border);
    transition: var(--transition);
}

.product-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow);
}

.product-image {
    height: 140px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: #fff;
    background: linear-gradient(135deg, var(--primary), #e17055);
}

.product-info {
    padding: 24px;
}

.product-tag {
    display: inline-block;
    padding: 2px 12px;
    border-radius: 50px;
    background: rgba(108, 92, 231, 0.1);
    color: var(--primary);
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.product-info h3 {
    font-size: 1.15rem;
    margin-bottom: 8px;
}

.product-info p {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 16px;
}

.product-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.price {
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-muted);
}

/* ===== 关于 ===== */
.about {
    background: var(--bg);
}

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

.about-text h2 {
    font-size: 2.2rem;
    margin-bottom: 20px;
}

.about-text p {
    color: var(--text-muted);
    margin-bottom: 16px;
    font-size: 1.05rem;
}

.about-values {
    display: flex;
    gap: 24px;
    margin-top: 24px;
    flex-wrap: wrap;
}

.about-values div {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 500;
    color: var(--primary);
}

.about-stats-cards {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.stat-card {
    background: var(--bg-alt);
    border-radius: var(--radius-sm);
    padding: 28px 20px;
    text-align: center;
    font-weight: 500;
    border: 1px solid var(--border);
    transition: var(--transition);
}

.stat-card:hover {
    border-color: var(--primary-light);
    transform: scale(1.02);
}

.stat-card strong {
    display: block;
    font-size: 2.2rem;
    color: var(--primary);
    margin-bottom: 4px;
}

/* ===== 联系 ===== */
.contact {
    background: var(--bg-alt);
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 48px;
    align-items: start;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.contact-form input,
.contact-form textarea {
    padding: 16px 20px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    font-family: var(--font);
    font-size: 1rem;
    transition: var(--transition);
    background: #fff;
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(108, 92, 231, 0.1);
}

.form-feedback {
    font-size: 0.9rem;
    min-height: 24px;
    color: #10b981;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 20px;
    font-size: 1rem;
    padding-top: 8px;
}

.contact-info i {
    width: 28px;
    color: var(--primary);
}

.social-links {
    display: flex;
    gap: 16px;
    margin-top: 8px;
}

.social-links a {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: #fff;
    border: 1px solid var(--border);
    color: var(--text-muted);
    font-size: 1.2rem;
    transition: var(--transition);
}

.social-links a:hover {
    color: var(--primary);
    border-color: var(--primary);
    background: rgba(108, 92, 231, 0.05);
}

/* ===== 页脚 ===== */
.footer {
    background: #1a1a2e;
    color: #ccc;
    padding: 60px 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand h3 {
    color: #fff;
    font-size: 1.5rem;
    margin-bottom: 8px;
}

.footer-brand p {
    font-size: 0.95rem;
    opacity: 0.7;
}

.footer-links h4 {
    color: #fff;
    margin-bottom: 16px;
    font-size: 1rem;
}

.footer-links ul li {
    margin-bottom: 8px;
}

.footer-links a {
    opacity: 0.7;
    transition: var(--transition);
    font-size: 0.9rem;
}

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

.footer-bottom {
    text-align: center;
    padding: 24px 0;
    font-size: 0.85rem;
    opacity: 0.6;
}

/* ===== 响应式 ===== */
@media (max-width: 992px) {
    .hero-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-content p {
        margin: 0 auto 32px;
    }

    .hero-buttons {
        justify-content: center;
    }

    .hero-stats {
        justify-content: center;
    }

    .hero-visual {
        max-width: 400px;
        margin: 0 auto;
    }

    .about-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .about-values {
        justify-content: center;
    }

    .contact-wrapper {
        grid-template-columns: 1fr;
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 72px;
        left: 0;
        width: 100%;
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(12px);
        padding: 24px;
        border-bottom: 1px solid var(--border);
        transform: translateY(-120%);
        opacity: 0;
        transition: var(--transition);
        box-shadow: 0 20px 40px rgba(0, 0, 0, 0.05);
    }

    .nav-menu.open {
        transform: translateY(0);
        opacity: 1;
    }

    .nav-menu ul {
        flex-direction: column;
        gap: 4px;
    }

    .nav-menu a {
        display: block;
        padding: 12px 16px;
    }

    .menu-toggle {
        display: block;
    }

    .section-header h2 {
        font-size: 2rem;
    }

    .hero-content h1 {
        font-size: 2.5rem;
    }

    .hero-stats {
        flex-wrap: wrap;
        gap: 16px;
    }

    .hero-stats div {
        flex: 1 0 40%;
    }

    .products-grid {
        grid-template-columns: 1fr;
    }

    .about-stats-cards {
        grid-template-columns: 1fr 1fr;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

    .hero {
        padding: 120px 0 60px;
    }

    .hero-content h1 {
        font-size: 2rem;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .hero-card {
        padding: 20px;
    }

    .card-alt {
        width: 100%;
    }

    .about-stats-cards {
        grid-template-columns: 1fr;
    }

    .services-grid {
        grid-template-columns: 1fr;
    }
}
```

```javascript