body {
    margin: 0;
    font-size: 16px;
    line-height: 1.75;
}

a {
    color: var(--sdk-primary);
    text-decoration: none;
}

a:hover {
    color: var(--sdk-primary-dark);
}

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

.sdk-container {
    width: min(1180px, calc(100% - 32px));
    margin: 0 auto;
}

.sdk-topbar {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(229, 231, 235, 0.9);
}

.sdk-topbar-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    min-height: 76px;
}

.sdk-brand a {
    font-size: 20px;
    font-weight: 700;
    color: #111827;
}

.sdk-nav {
    display: flex;
    align-items: center;
    gap: 20px;
    flex-wrap: wrap;
}

.sdk-nav,
.sdk-nav ul {
    margin: 0;
    padding: 0;
    list-style: none;
}

.sdk-nav a {
    color: #374151;
    font-weight: 500;
}

.sdk-topbar-action a,
.sdk-btn,
.sdk-telegram-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    border-radius: 999px;
    padding: 12px 20px;
    font-weight: 700;
    transition: all .2s ease;
}

.sdk-topbar-action a,
.sdk-btn-primary,
.sdk-telegram-button {
    color: #fff;
    background: var(--sdk-primary);
    box-shadow: 0 10px 24px rgba(37, 99, 235, 0.18);
}

.sdk-topbar-action a:hover,
.sdk-btn-primary:hover,
.sdk-telegram-button:hover {
    color: #fff;
    background: var(--sdk-primary-dark);
    transform: translateY(-1px);
}

.sdk-btn-secondary {
    color: var(--sdk-primary);
    background: #eff6ff;
    border: 1px solid #bfdbfe;
}

.sdk-btn-secondary:hover {
    background: #dbeafe;
}

.site-main section,
.sdk-homepage section {
    padding: 72px 0;
}

.sdk-about-hero,
.sdk-contact-hero,
.sdk-privacy-hero,
.sdk-faq-hero,
.sdk-shuoming-hero,
.sdk-solution-hero {
    padding-top: 80px;
    padding-bottom: 56px;
    background: linear-gradient(180deg, #eff6ff 0%, #f8fafc 100%);
}

.sdk-section-heading {
    max-width: 860px;
    margin: 0 auto 40px;
    text-align: center;
}

.sdk-section-heading-left {
    margin: 0;
    text-align: left;
}

.sdk-section-tag,
.sdk-hero-badge,
.sdk-cta-badge {
    display: inline-block;
    margin-bottom: 14px;
    padding: 6px 12px;
    border-radius: 999px;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: .02em;
    color: var(--sdk-primary-dark);
    background: #dbeafe;
}

.sdk-section-heading h1,
.sdk-section-heading h2,
.sdk-cta-title,
.sdk-hero-title {
    margin: 0 0 16px;
    line-height: 1.2;
    color: #0f172a;
}

.sdk-section-heading h1,
.sdk-hero-title {
    font-size: clamp(34px, 5vw, 52px);
}

.sdk-section-heading h2,
.sdk-cta-title {
    font-size: clamp(28px, 4vw, 40px);
}

.sdk-section-heading p,
.sdk-hero-desc,
.sdk-cta-desc {
    margin: 0;
    color: var(--sdk-subtle);
    font-size: 18px;
}

.sdk-hero-actions {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
    margin-top: 28px;
}

.sdk-summary-grid,
.sdk-platform-grid,
.sdk-solutions-grid,
.sdk-about-grid,
.sdk-process-grid,
.sdk-support-grid,
.sdk-testimonial-grid,
.sdk-faq-list {
    display: grid;
    gap: 24px;
}

.sdk-summary-grid,
.sdk-platform-grid,
.sdk-solutions-grid,
.sdk-support-grid,
.sdk-testimonial-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.sdk-about-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.sdk-process-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

.sdk-faq-list {
    grid-template-columns: 1fr;
}

.sdk-summary-card,
.sdk-platform-card,
.sdk-solution-card,
.sdk-about-card,
.sdk-process-item,
.sdk-support-card,
.sdk-testimonial-card,
.sdk-faq-item,
.sdk-cta-box,
.sdk-intro-content {
    background: var(--sdk-card);
    border: 1px solid var(--sdk-line);
    border-radius: 20px;
    box-shadow: 0 12px 30px rgba(15, 23, 42, 0.05);
}

.sdk-summary-card,
.sdk-platform-card,
.sdk-solution-card,
.sdk-about-card,
.sdk-process-item,
.sdk-support-card,
.sdk-testimonial-card,
.sdk-faq-item,
.sdk-intro-content {
    padding: 28px;
}

.sdk-summary-card h3,
.sdk-platform-card h3,
.sdk-solution-card h3,
.sdk-about-card h3,
.sdk-process-item h3,
.sdk-support-card h3,
.sdk-faq-item h3,
.sdk-footer-heading,
.sdk-footer-title {
    margin: 0 0 12px;
    color: #111827;
}

.sdk-summary-card p,
.sdk-platform-card p,
.sdk-solution-card p,
.sdk-about-card p,
.sdk-process-item p,
.sdk-support-card p,
.sdk-faq-item p,
.sdk-testimonial-card p,
.sdk-footer-desc,
.sdk-footer-list,
.sdk-intro-content {
    margin: 0;
    color: var(--sdk-subtle);
}

.sdk-summary-icon,
.sdk-process-num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    margin-bottom: 18px;
    border-radius: 14px;
    background: #eff6ff;
    color: var(--sdk-primary-dark);
    font-size: 22px;
    font-weight: 800;
}

.sdk-about-list,
.sdk-footer-list {
    margin: 0;
    padding-left: 20px;
    color: var(--sdk-subtle);
}

.sdk-about-list li,
.sdk-footer-list li {
    margin: 8px 0;
}

.sdk-testimonial-card cite {
    display: block;
    margin-top: 14px;
    font-style: normal;
    color: #374151;
    font-weight: 600;
}

.sdk-cta-section {
    padding-top: 24px;
}

.sdk-cta-box {
    padding: 40px;
    text-align: center;
    background: linear-gradient(180deg, #ffffff 0%, #eff6ff 100%);
}

.sdk-footer {
    margin-top: 32px;
    padding: 32px 0 18px;
    background: #0f172a;
    color: rgba(255, 255, 255, 0.88);
}

.sdk-footer-top {
    display: grid;
    grid-template-columns: 1.4fr 0.9fr 0.8fr;
    gap: 24px;
}

.sdk-footer-title,
.sdk-footer-heading,
.sdk-footer a {
    color: #fff;
}

.sdk-footer-desc,
.sdk-footer-list,
.sdk-footer-list li,
.sdk-footer-bottom {
    color: rgba(255, 255, 255, 0.72);
}


.sdk-footer-title {
    margin: 0 0 10px;
    font-size: 18px;
    font-weight: 800;
}

.sdk-footer-heading {
    margin: 0 0 10px;
    font-size: 16px;
    font-weight: 700;
}

.sdk-footer-desc,
.sdk-footer-list li,
.sdk-footer-copyright {
    font-size: 14px;
    line-height: 1.75;
}

.sdk-footer-list {
    margin: 0;
    padding: 0;
    list-style: none;
}

.sdk-footer-list li {
    margin-bottom: 8px;
}

.sdk-footer-contact {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 40px;
    padding: 0 14px;
    border-radius: 12px;
    margin-top: 8px;
    font-size: 14px;
    font-weight: 700;
    background: #1e3a8a;
    color: #fff;
}

.sdk-footer-bottom {
    margin-top: 18px;
    padding-top: 14px;
    border-top: 1px solid rgba(255, 255, 255, 0.12);
}

.sdk-homepage .sdk-intro-content {
    background: #fff;
}

.sdk-industry-grid,
.sdk-hero-features,
.sdk-cta-features {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.sdk-industry-tag,
.sdk-hero-features span,
.sdk-cta-feature {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 14px;
    border-radius: 999px;
    background: #fff;
    border: 1px solid var(--sdk-line);
    color: #374151;
    font-weight: 500;
}

@media (max-width: 1024px) {
    .sdk-footer-top,
    .sdk-process-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 820px) {
    .sdk-topbar-inner {
        min-height: auto;
        padding: 14px 0;
        flex-direction: column;
        align-items: flex-start;
    }

    .sdk-summary-grid,
    .sdk-platform-grid,
    .sdk-solutions-grid,
    .sdk-about-grid,
    .sdk-process-grid,
    .sdk-support-grid,
    .sdk-testimonial-grid,
    .sdk-footer-top {
        grid-template-columns: 1fr;
    }

    .sdk-cta-box,
    .sdk-summary-card,
    .sdk-platform-card,
    .sdk-solution-card,
    .sdk-about-card,
    .sdk-process-item,
    .sdk-support-card,
    .sdk-testimonial-card,
    .sdk-faq-item,
    .sdk-intro-content {
        padding: 22px;
    }

    .sdk-section-heading p,
    .sdk-hero-desc,
    .sdk-cta-desc {
        font-size: 16px;
    }
}