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

:root {
    --primary-color: #165DFF;
    --secondary-color: #0D47A1;
    --accent-color: #E8F3FF;
    --bg-white: #FFFFFF;
    --bg-light: #F5F7FA;
    --text-dark: #333333;
    --text-light: #666666;
    --border-color: #E5E7EB;
    --shadow: 0 2px 8px rgba(22, 93, 255, 0.08);
    --radius: 8px;
}

body {
    font-family: "Microsoft YaHei", "思源黑体", Arial, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--bg-white);
}

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

.header {
    background: var(--bg-white);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
}

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

.logo h1 {
    font-size: 1.6rem;
    color: var(--primary-color);
    font-weight: 700;
}

.logo .logo-en {
    font-size: 0.75rem;
    color: var(--text-light);
    letter-spacing: 1px;
}

.nav ul {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav a {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    transition: color 0.3s;
    padding: 5px 0;
    border-bottom: 2px solid transparent;
}

.nav a:hover,
.nav a.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}

.header-actions {
    display: flex;
    gap: 15px;
    align-items: center;
}

.btn {
    display: inline-block;
    padding: 10px 24px;
    border-radius: var(--radius);
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
    cursor: pointer;
    border: none;
    font-size: 0.95rem;
}

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

.btn-primary:hover {
    background: #0D47A1;
    transform: translateY(-1px);
}

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

.btn-secondary:hover {
    background: var(--accent-color);
}

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

.btn-outline:hover {
    background: var(--accent-color);
}

.btn-block {
    width: 100%;
    display: block;
    text-align: center;
}

.hero {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: var(--bg-white);
    padding: 120px 0;
    text-align: center;
}

.hero-content h2 {
    font-size: 2.5rem;
    margin-bottom: 20px;
    line-height: 1.3;
}

.hero-content p {
    font-size: 1.15rem;
    margin-bottom: 40px;
    opacity: 0.95;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
}

.section {
    padding: 100px 0;
}

.section-alt {
    background: var(--bg-light);
}

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

.section-header h2 {
    font-size: 2rem;
    color: var(--text-dark);
    margin-bottom: 15px;
}

.section-header p {
    color: var(--text-light);
    font-size: 1.05rem;
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.tool-card {
    background: var(--bg-white);
    padding: 35px 30px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    transition: transform 0.3s, box-shadow 0.3s;
    border: 1px solid var(--border-color);
}

.tool-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(22, 93, 255, 0.12);
    border-color: var(--primary-color);
}

.tool-icon {
    font-size: 2.5rem;
    margin-bottom: 20px;
    color: var(--primary-color);
}

.tool-card h3 {
    font-size: 1.2rem;
    color: var(--text-dark);
    margin-bottom: 12px;
}

.tool-card p {
    color: var(--text-light);
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: 20px;
}

.tool-link {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 30px;
}

.advantage-card {
    background: var(--bg-white);
    padding: 35px 30px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    text-align: center;
    transition: transform 0.3s;
}

.advantage-card:hover {
    transform: translateY(-5px);
}

.advantage-icon {
    font-size: 2.5rem;
    margin-bottom: 20px;
}

.advantage-card h4 {
    font-size: 1.15rem;
    color: var(--text-dark);
    margin-bottom: 12px;
}

.advantage-card p {
    color: var(--text-light);
    font-size: 0.95rem;
    line-height: 1.6;
}

.cases-filters {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 10px 20px;
    border: 1px solid var(--border-color);
    background: var(--bg-white);
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.3s;
    font-size: 0.95rem;
    color: var(--text-dark);
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--primary-color);
    color: var(--bg-white);
    border-color: var(--primary-color);
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.case-card {
    background: var(--bg-white);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: transform 0.3s;
}

.case-card:hover {
    transform: translateY(-5px);
}

.case-image {
    height: 180px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
}

.case-placeholder {
    color: var(--bg-white);
    font-size: 1rem;
    opacity: 0.8;
}

.case-info {
    padding: 20px;
}

.case-tag {
    display: inline-block;
    padding: 4px 12px;
    background: var(--accent-color);
    color: var(--primary-color);
    font-size: 0.85rem;
    border-radius: 4px;
    margin-bottom: 10px;
}

.case-info h3 {
    font-size: 1.1rem;
    color: var(--text-dark);
    margin-bottom: 8px;
}

.case-info p {
    color: var(--text-light);
    font-size: 0.9rem;
    line-height: 1.5;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    align-items: start;
}

.pricing-card {
    background: var(--bg-white);
    border-radius: var(--radius);
    padding: 40px 30px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
    position: relative;
}

.pricing-card.featured {
    border-color: var(--primary-color);
    box-shadow: 0 8px 30px rgba(22, 93, 255, 0.15);
}

.pricing-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary-color);
    color: var(--bg-white);
    padding: 6px 20px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
}

.pricing-header h3 {
    font-size: 1.3rem;
    color: var(--text-dark);
    margin-bottom: 8px;
}

.pricing-desc {
    color: var(--text-light);
    font-size: 0.95rem;
    margin-bottom: 20px;
}

.pricing-price {
    margin-bottom: 25px;
}

.pricing-price .price {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.pricing-price .period {
    font-size: 1rem;
    color: var(--text-light);
}

.pricing-features {
    list-style: none;
    margin-bottom: 30px;
}

.pricing-features li {
    padding: 10px 0;
    color: var(--text-dark);
    font-size: 0.95rem;
    border-bottom: 1px solid var(--border-color);
}

.pricing-features li:last-child {
    border-bottom: none;
}

.compliance-content {
    display: flex;
    flex-direction: column;
    gap: 40px;
}

.compliance-intro {
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}

.compliance-intro h3 {
    font-size: 1.5rem;
    color: var(--text-dark);
    margin-bottom: 15px;
}

.compliance-intro p {
    color: var(--text-light);
    line-height: 1.7;
}

.compliance-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.compliance-card {
    background: var(--bg-white);
    padding: 30px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    border-top: 3px solid var(--primary-color);
}

.compliance-card h4 {
    font-size: 1.15rem;
    color: var(--text-dark);
    margin-bottom: 20px;
}

.compliance-card ul {
    list-style: none;
}

.compliance-card li {
    color: var(--text-light);
    padding: 10px 0;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.95rem;
}

.compliance-card li:last-child {
    border-bottom: none;
}

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

.about-text h3 {
    font-size: 1.5rem;
    color: var(--text-dark);
    margin-bottom: 20px;
}

.about-text p {
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 15px;
}

.about-contact h3 {
    font-size: 1.5rem;
    color: var(--text-dark);
    margin-bottom: 25px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
}

.contact-icon {
    font-size: 1.5rem;
}

.contact-item span:last-child {
    color: var(--text-dark);
    font-size: 1.05rem;
}

.contact-form-wrapper {
    max-width: 700px;
    margin: 0 auto;
    background: var(--bg-white);
    padding: 40px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 20px;
}

.form-row:last-child {
    margin-bottom: 0;
}

.contact-form-wrapper input,
.contact-form-wrapper select,
.contact-form-wrapper textarea {
    width: 100%;
    padding: 14px 16px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.3s;
}

.contact-form-wrapper input:focus,
.contact-form-wrapper select:focus,
.contact-form-wrapper textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.contact-form-wrapper textarea {
    resize: vertical;
}

.footer {
    background: var(--text-dark);
    color: var(--bg-white);
    padding: 60px 0 30px;
}

.footer-content {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 30px;
    flex-wrap: wrap;
}

.footer-links a {
    color: var(--bg-white);
    text-decoration: none;
    opacity: 0.8;
    transition: opacity 0.3s;
}

.footer-links a:hover {
    opacity: 1;
}

.footer-divider {
    height: 1px;
    background: rgba(255,255,255,0.1);
}

.footer-bottom {
    display: flex;
    flex-direction: column;
    gap: 15px;
    text-align: center;
}

.footer-info p {
    color: var(--bg-white);
    opacity: 0.8;
    font-size: 0.95rem;
    line-height: 1.6;
}

.footer-icp {
    margin: 5px 0;
}

.footer-icp a {
    color: var(--bg-white);
    text-decoration: none;
    opacity: 0.8;
}

.footer-icp a:hover {
    opacity: 1;
    text-decoration: underline;
}

.footer-copyright p {
    color: var(--bg-white);
    opacity: 0.6;
    font-size: 0.9rem;
}

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.6);
    z-index: 2000;
    justify-content: center;
    align-items: center;
}

.modal-content {
    background: var(--bg-white);
    padding: 40px;
    border-radius: var(--radius);
    max-width: 500px;
    width: 90%;
    position: relative;
}

.modal-close {
    position: absolute;
    top: 15px;
    right: 20px;
    font-size: 1.8rem;
    cursor: pointer;
    color: var(--text-light);
}

.modal-close:hover {
    color: var(--primary-color);
}

@media (max-width: 992px) {
    .header .container {
        flex-direction: column;
        gap: 15px;
    }

    .nav ul {
        flex-wrap: wrap;
        justify-content: center;
        gap: 15px;
    }

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

    .hero-content h2 {
        font-size: 2rem;
    }
}

@media (max-width: 768px) {
    .section {
        padding: 60px 0;
    }

    .hero {
        padding: 80px 0;
    }

    .hero-buttons {
        flex-direction: column;
        gap: 15px;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .section-header h2 {
        font-size: 1.6rem;
    }

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

    .footer-links {
        flex-direction: column;
        gap: 15px;
    }
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

.generating {
    animation: pulse 1.5s infinite;
}