:root {
    --color-bg: #0a1833;
    --color-bg-card: rgba(22,36,71,0.85);
    --color-bg-section: rgba(22,36,71,0.7);
    --color-primary: #3fa7ff;
    --color-primary-grad: linear-gradient(90deg, #3fa7ff 0%, #7f8fff 100%);
    --color-secondary: #7f8fff;
    --color-title: #3fa7ff;
    --color-text: #e0e6f6;
    --color-text-light: #b0c4de;
    --color-footer: #101c3a;
    --color-card-shadow: #3fa7ff11;
    --color-btn-bg: linear-gradient(90deg, #3fa7ff 0%, #7f8fff 100%);
    --color-btn-bg-hover: linear-gradient(90deg, #1e7ed6 0%, #3fa7ff 100%);
    --color-btn-text: #fff;
    --color-border: #3fa7ff22;
}
body.theme-light {
    --color-bg: #f7faff;
    --color-bg-card: #fff;
    --color-bg-section: #f2f6fb;
    --color-primary: #2563eb;
    --color-primary-grad: linear-gradient(90deg, #2563eb 0%, #60a5fa 100%);
    --color-secondary: #60a5fa;
    --color-title: #2563eb;
    --color-text: #1e2746;
    --color-text-light: #64748b;
    --color-footer: #e5eaf3;
    --color-card-shadow: #2563eb11;
    --color-btn-bg: linear-gradient(90deg, #2563eb 0%, #60a5fa 100%);
    --color-btn-bg-hover: linear-gradient(90deg, #60a5fa 0%, #2563eb 100%);
    --color-btn-text: #fff;
    --color-border: #2563eb22;
}
body {
    margin: 0;
    font-family: 'PingFang SC', 'Segoe UI', 'Microsoft YaHei', Arial, sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
    transition: background 0.3s, color 0.3s;
}

header {
    background: var(--color-footer);
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
    backdrop-filter: blur(8px);
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px 40px;
}

.logo {
    font-size: 2.2rem;
    font-weight: bold;
    color: var(--color-title);
    letter-spacing: 2px;
    text-shadow: 0 4px 24px #3fa7ff44;
}

.nav-links {
    list-style: none;
    display: flex;
    gap: 32px;
    margin: 0;
    padding: 0;
}

.nav-links a {
    color: #fff;
    text-decoration: none;
    font-size: 1.08rem;
    font-weight: 500;
    letter-spacing: 1px;
    transition: color 0.2s;
}

.nav-links a:hover {
    color: #3fa7ff;
    text-shadow: 0 2px 8px #3fa7ff55;
}

.nav-auth {
    display: flex;
    gap: 16px;
    margin-left: 32px;
}

.btn-login, .btn-register {
    display: inline-block;
    padding: 8px 22px;
    border-radius: 20px;
    font-size: 1rem;
    font-weight: 500;
    text-decoration: none;
    transition: background 0.2s, color 0.2s;
}

.btn-login {
    background: transparent;
    color: #3fa7ff;
    border: 1.5px solid #3fa7ff;
}

.btn-login:hover {
    background: #3fa7ff;
    color: #fff;
}

.btn-register {
    background: #3fa7ff;
    color: #fff;
    border: 1.5px solid #3fa7ff;
}

.btn-register:hover {
    background: #1e7ed6;
    border-color: #1e7ed6;
}

.product-buy {
    display: inline-block;
    margin-top: 18px;
    background: #3fa7ff;
    color: #fff;
    padding: 8px 28px;
    border-radius: 18px;
    font-size: 1rem;
    font-weight: 500;
    text-decoration: none;
    box-shadow: 0 2px 8px rgba(63,167,255,0.10);
    transition: background 0.2s;
}

.product-buy:hover {
    background: #1e7ed6;
}

.hero {
    position: relative;
    min-height: 480px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    padding: 0;
}
.hero-bg-carousel {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}
.hero-bg-carousel .carousel-container {
    width: 100vw;
    height: 100%;
    min-height: 480px;
    position: absolute;
    top: 0; left: 0;
    border-radius: 0;
    box-shadow: none;
}
.hero-bg-carousel .carousel-slide {
    display: none;
    width: 100vw;
    height: 100%;
    position: absolute;
    top: 0; left: 0;
    z-index: 1;
}
.hero-bg-carousel .carousel-slide.active {
    display: block;
    opacity: 1;
}
.hero-bg-carousel .carousel-slide img {
    width: 100vw;
    height: 100%;
    object-fit: cover;
    min-height: 480px;
    filter: brightness(0.85) blur(0.5px);
}
.hero-bg-carousel::after {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: linear-gradient(120deg, #1e3c72cc 0%, #2a5298cc 100%);
    z-index: 2;
}
.hero-bg-carousel::before {
    content: '';
    position: absolute;
    left: 0; right: 0; top: 0; bottom: 0;
    background: radial-gradient(circle at 20% 30%, #3fa7ff33 0%, transparent 60%),
                radial-gradient(circle at 80% 70%, #a7e0ff22 0%, transparent 60%),
                radial-gradient(circle at 60% 20%, #fff8 0%, transparent 70%);
    z-index: 3;
    pointer-events: none;
}
.hero-content {
    position: relative;
    z-index: 10;
    text-align: center;
    width: 100%;
    color: #fff;
    padding: 100px 0 80px 0;
}
.hero-content h1 {
    font-size: 3.6rem;
    margin-bottom: 24px;
    font-weight: 800;
    letter-spacing: 2px;
    text-shadow: 0 8px 32px #000a, 0 2px 8px #3fa7ff55;
}
.hero-content p {
    font-size: 1.5rem;
    margin-bottom: 38px;
    color: #e0e6f6;
    text-shadow: 0 2px 8px #0008;
}
@media (max-width: 900px) {
    .hero, .hero-bg-carousel .carousel-container, .hero-bg-carousel .carousel-slide img {
        min-height: 180px;
        height: 180px;
    }
    .hero-content {
        padding: 40px 0 30px 0;
    }
    .hero-content h1 {
        font-size: 2rem;
    }
}

.btn-primary {
    display: inline-block;
    background: var(--color-btn-bg);
    color: var(--color-btn-text);
    padding: 16px 48px;
    border-radius: 30px;
    font-size: 1.18rem;
    font-weight: 700;
    text-decoration: none;
    box-shadow: 0 4px 24px var(--color-card-shadow), 0 0 0 8px var(--color-border)22;
    transition: background 0.2s, box-shadow 0.2s;
    border: none;
    position: relative;
    overflow: hidden;
}
.btn-primary:hover {
    background: var(--color-btn-bg-hover);
    box-shadow: 0 8px 32px var(--color-card-shadow), 0 0 0 12px var(--color-border)22;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding-left: 40px;
    padding-right: 40px;
}
@media (max-width: 900px) {
    .container {
        padding-left: 12px;
        padding-right: 12px;
    }
}
section, .partners, .flow, .testimonials, .faq-mini, .links {
    max-width: 1200px;
    margin: 0 auto 56px auto;
    padding-left: 40px;
    padding-right: 40px;
    box-sizing: border-box;
}
@media (max-width: 900px) {
    section, .partners, .flow, .testimonials, .faq-mini, .links {
        padding-left: 12px;
        padding-right: 12px;
    }
}
h2 {
    font-size: 2.3rem;
    margin-bottom: 36px;
    color: var(--color-title);
    text-align: center;
    font-weight: 800;
    letter-spacing: 1.5px;
    position: relative;
    padding-bottom: 10px;
}
h2::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, #3fa7ff 0%, #7f8fff 100%);
    border-radius: 2px;
    margin: 18px auto 0 auto;
}
section {
    margin-bottom: 56px;
}
.product-list-row, .partner-logos-row, .flow-steps, .testimonial-list, .faq-mini-list, .link-list {
    justify-content: center;
    align-items: stretch;
    margin-left: auto;
    margin-right: auto;
}
.product-list-row, .partner-logos-row, .flow-steps, .testimonial-list, .faq-mini-list, .link-list {
    width: 100%;
    max-width: 1200px;
    box-sizing: border-box;
}
.product-list-row {
    margin-bottom: 32px;
}
.partner-logos-row {
    margin-bottom: 18px;
}
.flow-steps {
    margin-top: 24px;
}
.testimonial-list, .faq-mini-list {
    margin-top: 18px;
}
.link-list {
    margin-top: 18px;
}
.product-item, .partner-logos-row img, .flow-step, .testimonial-item, .faq-mini-item {
    box-sizing: border-box;
}
footer {
    max-width: 1200px;
    margin: 0 auto;
    padding-left: 40px;
    padding-right: 40px;
    box-sizing: border-box;
}
@media (max-width: 900px) {
    footer {
        padding-left: 12px;
        padding-right: 12px;
    }
}

.product-list {
    display: flex;
    gap: 32px;
    justify-content: center;
}

.product-list-row {
    display: flex;
    gap: 32px;
    justify-content: center;
    margin-bottom: 32px;
    flex-wrap: nowrap;
}
.product-list-row .product-item {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    align-items: stretch;
    min-height: 260px;
    max-height: 340px;
    height: auto;
    flex: 1 1 0;
    min-width: 220px;
    max-width: 260px;
    margin: 0;
    padding: 24px 16px 18px 16px;
    box-shadow: 0 4px 32px var(--color-card-shadow), 0 1.5px 8px #fff2;
    text-align: center;
    background: var(--color-bg-card);
    border-radius: 20px;
    transition: box-shadow 0.2s, transform 0.2s, border 0.2s;
    backdrop-filter: blur(4px);
    border: 1.5px solid var(--color-border);
    position: relative;
}
.product-list-row .product-item:hover {
    box-shadow: 0 12px 48px var(--color-card-shadow), 0 2px 16px #fff3;
    transform: translateY(-8px) scale(1.04);
    border: 1.5px solid #3fa7ff88;
}
.product-item h3 {
    margin-top: 0;
    margin-bottom: 10px;
    color: var(--color-title);
    font-size: 1.2rem;
    font-weight: 700;
    letter-spacing: 1px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}
.product-item .product-icon {
    width: 28px;
    height: 28px;
    margin-right: 2px;
    vertical-align: middle;
    filter: drop-shadow(0 2px 8px var(--color-card-shadow));
}
.product-item p {
    flex: 0 0 auto;
    margin-bottom: 10px;
    color: var(--color-text);
    font-size: 1rem;
}
.product-item .product-buy {
    background: var(--color-btn-bg);
    color: var(--color-btn-text);
    padding: 8px 28px;
    border-radius: 18px;
    font-size: 1rem;
    font-weight: 500;
    text-decoration: none;
    box-shadow: 0 2px 8px var(--color-card-shadow);
    transition: background 0.2s, box-shadow 0.2s;
    border: none;
    margin-bottom: 0;
    margin-top: 0;
}
.product-item .product-buy:hover {
    background: var(--color-btn-bg-hover);
    box-shadow: 0 4px 16px var(--color-card-shadow);
}
.product-item .product-detail-link {
    background: transparent;
    color: var(--color-primary);
    border: 1.5px solid var(--color-border);
    padding: 6px 20px;
    border-radius: 16px;
    font-size: 0.98rem;
    font-weight: 500;
    text-decoration: none;
    transition: background 0.2s, color 0.2s, border 0.2s;
    margin-bottom: 0;
    margin-top: 6px;
}
.product-item .product-detail-link:hover {
    background: var(--color-primary);
    color: var(--color-btn-text);
    border: 1.5px solid var(--color-border);
}
.product-item {
    position: relative;
}

.advantages, .cases, .faq {
    background: var(--color-bg-section);
    border-radius: 20px;
    margin-top: 40px;
    box-shadow: 0 2px 12px rgba(16,28,58,0.08);
}

.advantage-list {
    display: flex;
    gap: 32px;
    justify-content: center;
    flex-wrap: wrap;
}

.advantage-item {
    background: var(--color-bg-card);
    border-radius: 14px;
    padding: 28px 18px;
    flex: 1;
    min-width: 180px;
    text-align: center;
    margin-bottom: 16px;
}

.advantage-item h4 {
    color: var(--color-title);
    margin-bottom: 10px;
}

.case-list {
    display: flex;
    gap: 32px;
    justify-content: center;
    flex-wrap: wrap;
}

.case-item {
    background: var(--color-bg-card);
    border-radius: 14px;
    padding: 24px 16px;
    flex: 1;
    min-width: 180px;
    text-align: center;
    margin-bottom: 16px;
}

.case-item h5 {
    color: var(--color-title);
    margin-bottom: 8px;
}

.faq-list {
    display: flex;
    flex-direction: column;
    gap: 18px;
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: var(--color-bg-card);
    border-radius: 10px;
    padding: 18px 20px;
}

.faq-item h6 {
    color: var(--color-title);
    margin-bottom: 6px;
    font-size: 1.1rem;
}

.about-content, .contact-content {
    background: var(--color-bg-card);
    border-radius: 16px;
    padding: 40px 32px;
    max-width: 900px;
    margin: 0 auto;
    color: var(--color-text);
    box-shadow: 0 2px 12px rgba(63,167,255,0.08);
    font-size: 1.1rem;
}
.about-content h3 {
    color: var(--color-title);
    margin-top: 28px;
    margin-bottom: 10px;
}
.about-content ul, .contact-content ul {
    margin: 16px 0 0 24px;
    padding: 0;
    color: var(--color-text-light);
}
.contact-content a {
    color: var(--color-primary);
    text-decoration: underline;
}
.contact-content a.btn-primary {
    text-decoration: none;
}

.navbar-fixed {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: var(--color-footer);
    box-shadow: 0 2px 16px rgba(16,28,58,0.12);
    backdrop-filter: blur(10px);
    animation: nav-fade-in 0.3s;
}
@keyframes nav-fade-in {
    from { opacity: 0; transform: translateY(-20px); }
    to { opacity: 1; transform: translateY(0); }
}

.carousel-section {
    max-width: 1200px;
    margin: 0 auto 40px auto;
    padding: 0 40px;
}
.carousel-container {
    position: relative;
    width: 100%;
    height: 320px;
    border-radius: 18px;
    overflow: hidden;
    box-shadow: 0 4px 24px rgba(63,167,255,0.10);
    background: var(--color-bg-section);
}
.carousel-slide {
    display: none;
    width: 100%;
    height: 100%;
    position: absolute;
    top: 0; left: 0;
    transition: opacity 0.5s;
}
.carousel-slide.active {
    display: block;
    position: relative;
    opacity: 1;
    z-index: 2;
}
.carousel-slide img {
    width: 100%;
    height: 320px;
    object-fit: cover;
    border-radius: 18px;
}
.carousel-dots {
    position: absolute;
    left: 50%;
    bottom: 18px;
    transform: translateX(-50%);
    display: flex;
    gap: 12px;
    z-index: 3;
}
.carousel-dots .dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: #fff3;
    border: 2px solid var(--color-primary);
    cursor: pointer;
    transition: background 0.2s, border 0.2s;
}
.carousel-dots .dot.active {
    background: var(--color-primary);
    border-color: var(--color-btn-text);
}

body.theme-light .partners {
    background: rgba(255,255,255,0.85);
    box-shadow: 0 2px 16px var(--color-card-shadow);
    backdrop-filter: blur(4px);
}
body.theme-light .partner-logos img,
body.theme-light .partner-logos-row img {
    background: #f2f6fb;
    filter: grayscale(0.1) brightness(1.05) drop-shadow(0 2px 8px var(--color-card-shadow));
    opacity: 0.88;
}
body.theme-light .partner-logos img:hover,
body.theme-light .partner-logos-row img:hover {
    background: #e5eaf3;
    filter: none;
    opacity: 1;
}
body.theme-light #partnerCarousel img {
    background: #f2f6fb;
    filter: grayscale(0.1) brightness(1.05) drop-shadow(0 2px 8px var(--color-card-shadow));
    opacity: 0.88;
}
body.theme-light #partnerCarousel img.active {
    background: #fff;
    filter: none;
    opacity: 1;
}

.partners {
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 40px 0 40px;
    text-align: center;
    background: rgba(22,36,71,0.7);
    border-radius: 18px;
    box-shadow: 0 2px 16px var(--color-card-shadow);
    backdrop-filter: blur(4px);
}
.partner-logos {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 40px;
    flex-wrap: wrap;
    margin-top: 18px;
}
.partner-logos img {
    height: 48px;
    max-width: 120px;
    filter: grayscale(0.2) brightness(0.95) drop-shadow(0 2px 8px var(--color-card-shadow));
    opacity: 0.85;
    transition: filter 0.2s, opacity 0.2s, transform 0.2s;
    border-radius: 10px;
    background: #fff2;
    padding: 4px 10px;
}
.partner-logos img:hover {
    filter: none;
    opacity: 1;
    transform: scale(1.08);
    background: #fff4;
}
.flow {
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 40px 0 40px;
    text-align: center;
}
.flow-steps {
    display: flex;
    justify-content: center;
    gap: 48px;
    margin-top: 24px;
    flex-wrap: wrap;
    position: relative;
}
.flow-step {
    background: var(--color-bg-card);
    border-radius: 14px;
    padding: 24px 32px;
    min-width: 120px;
    box-shadow: 0 2px 12px var(--color-card-shadow);
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
}
.flow-step span {
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-btn-bg);
    color: var(--color-btn-text);
    font-weight: bold;
    font-size: 1.3rem;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    margin-bottom: 10px;
    box-shadow: 0 2px 8px var(--color-card-shadow);
}
.flow-step:not(:last-child)::after {
    content: '';
    display: block;
    position: absolute;
    right: -32px;
    top: 50%;
    width: 48px;
    height: 3px;
    background: linear-gradient(90deg, #3fa7ff 0%, #7f8fff 100%);
    border-radius: 2px;
    transform: translateY(-50%);
    z-index: 1;
}
.flow-step p {
    margin: 0;
    color: var(--color-text);
}
.links {
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 40px 0 40px;
    text-align: center;
}
.link-list {
    display: flex;
    justify-content: center;
    gap: 32px;
    flex-wrap: wrap;
    margin-top: 18px;
}
.link-list a {
    color: var(--color-primary);
    background: var(--color-bg-card);
    padding: 8px 24px;
    border-radius: 16px;
    text-decoration: none;
    font-weight: 500;
    transition: background 0.2s, color 0.2s;
}
.link-list a:hover {
    background: var(--color-primary);
    color: var(--color-btn-text);
}
@media (max-width: 900px) {
    .partners, .flow, .links {
        padding-left: 16px;
        padding-right: 16px;
    }
    .partner-logos {
        gap: 18px;
    }
    .flow-steps {
        gap: 18px;
    }
    .link-list {
        gap: 14px;
    }
}

.partner-logos-row {
    display: flex;
    justify-content: center;
    gap: 48px;
    margin-bottom: 18px;
}
.partner-logos-row:first-child {
    margin-top: 18px;
}
.partner-logos-row:last-child {
    margin-bottom: 0;
}
.partner-logos-row img {
    flex: 0 0 120px;
    height: 48px;
    max-width: 120px;
    filter: grayscale(0.2) brightness(0.95) drop-shadow(0 2px 8px var(--color-card-shadow));
    opacity: 0.85;
    transition: filter 0.2s, opacity 0.2s, transform 0.2s;
    border-radius: 10px;
    background: #fff2;
    padding: 4px 10px;
}
.partner-logos-row img:hover {
    filter: none;
    opacity: 1;
    transform: scale(1.08);
    background: #fff4;
}

.product-detail {
    max-width: 1000px;
    margin: 0 auto;
    padding: 60px 40px;
    background: var(--color-bg-card);
    border-radius: 18px;
    box-shadow: 0 2px 12px rgba(63,167,255,0.08);
    color: var(--color-text);
}
.product-detail h2 {
    color: var(--color-title);
    text-align: center;
    margin-bottom: 36px;
}
.product-detail-main {
    display: flex;
    gap: 48px;
    align-items: flex-start;
}
.product-detail-info {
    flex: 2;
}
.product-detail-info h3 {
    color: var(--color-title);
    margin-top: 18px;
    margin-bottom: 8px;
}
.product-detail-info ul {
    margin: 0 0 16px 24px;
    color: var(--color-text-light);
}
.product-detail-side {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 18px;
}
.product-detail-tags {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-top: 12px;
}
.product-detail-tags span {
    background: var(--color-primary);
    color: var(--color-btn-text);
    border-radius: 12px;
    padding: 4px 16px;
    font-size: 0.98rem;
    font-weight: 500;
}
@media (max-width: 900px) {
    .product-detail-main {
        flex-direction: column;
        gap: 24px;
    }
    .product-detail {
        padding: 32px 10px;
    }
}

.solutions {
    max-width: 1200px;
    margin: 0 auto;
    padding: 60px 40px;
    text-align: center;
}
.solution-list {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    max-width: 1100px;
    margin: 0 auto;
}
.solution-item {
    background: var(--color-bg-card);
    border-radius: 16px;
    box-shadow: 0 2px 12px rgba(63,167,255,0.08);
    padding: 32px 24px;
    flex: 1 1 260px;
    min-width: 260px;
    max-width: 320px;
    text-align: left;
    color: var(--color-text);
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    min-height: 340px;
}
.solution-item h3 {
    color: var(--color-title);
    margin-bottom: 12px;
}
.solution-item ul {
    margin: 12px 0 0 18px;
    color: var(--color-text-light);
    margin-top: auto;
}
@media (max-width: 900px) {
    .solutions {
        padding: 32px 10px;
    }
    .solution-list {
        grid-template-columns: 1fr;
        gap: 14px;
    }
    .solution-item {
        min-width: 90vw;
        max-width: 100vw;
        padding: 20px 10px;
    }
}

.testimonials {
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 40px 0 40px;
    text-align: center;
}
.testimonial-list {
    display: flex;
    gap: 32px;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 18px;
}
.testimonial-item {
    background: var(--color-bg-card);
    border-radius: 16px;
    padding: 28px 22px 22px 22px;
    min-width: 220px;
    max-width: 340px;
    box-shadow: 0 2px 12px var(--color-card-shadow);
    text-align: left;
    color: var(--color-text);
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}
.testimonial-user {
    color: var(--color-primary);
    font-weight: 600;
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 8px;
}
.testimonial-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--color-primary);
    box-shadow: 0 2px 8px var(--color-card-shadow);
}
.testimonial-stars {
    color: #ffd700;
    font-size: 1.1rem;
    margin-left: 6px;
}
.testimonial-content {
    font-size: 1.08rem;
    font-style: italic;
    margin-top: 6px;
}
.faq-mini {
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 40px 0 40px;
    text-align: center;
}
.faq-mini-list {
    display: flex;
    gap: 18px;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 18px;
    align-items: stretch;
}
.faq-mini-item {
    background: var(--color-bg-card);
    border-radius: 12px;
    padding: 18px 20px;
    min-width: 220px;
    max-width: 340px;
    color: var(--color-text);
    text-align: left;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    height: 100%;
    box-shadow: 0 2px 12px var(--color-card-shadow);
    border: 1.5px solid var(--color-border);
}
.faq-mini-item h6 {
    color: var(--color-primary);
    margin-bottom: 6px;
    font-size: 1.1rem;
    font-weight: 600;
}
@media (max-width: 900px) {
    .testimonials, .faq-mini {
        padding-left: 16px;
        padding-right: 16px;
    }
    .testimonial-list, .faq-mini-list {
        gap: 10px;
    }
    .product-list-row .product-item {
        max-width: 100%;
        min-width: 0;
        padding: 18px 8px 12px 8px;
    }
}

footer.container {
    background: var(--color-footer);
    padding: 40px 0 0 0;
    text-align: center;
    color: var(--color-text-light);
    font-size: 1rem;
    margin-top: 56px;
    border-radius: 0 0 24px 24px;
    box-shadow: 0 -2px 24px var(--color-card-shadow);
    position: relative;
    overflow: hidden;
}
.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-direction: row;
    justify-content: center;
    align-items: center;
    gap: 32px;
    padding-bottom: 18px;
    flex-wrap: wrap;
}
.footer-logo {
    font-size: 1.3rem;
    color: var(--color-primary);
    font-weight: bold;
    letter-spacing: 2px;
    margin-right: 18px;
}
.footer-divider {
    width: 100%;
    height: 1.5px;
    background: linear-gradient(90deg, #3fa7ff 0%, #7f8fff 100%);
    opacity: 0.18;
    margin: 18px 0 18px 0;
    border: none;
}
.footer-honor {
    display: flex;
    justify-content: center;
    gap: 18px;
    margin-bottom: 18px;
    flex-wrap: wrap;
}
.footer-honor img {
    height: 36px;
    border-radius: 8px;
    background: #fff2;
    box-shadow: 0 2px 8px var(--color-card-shadow);
    padding: 4px 10px;
}
@media (max-width: 900px) {
    .footer-content {
        flex-direction: column;
        gap: 8px;
    }
    .footer-honor {
        gap: 8px;
    }
}

.top-banner {
    width: 100%;
    background: linear-gradient(90deg, #3fa7ff 0%, #7f8fff 100%);
    color: var(--color-btn-text);
    font-size: 1.08rem;
    font-weight: 600;
    text-align: center;
    padding: 10px 0;
    letter-spacing: 1px;
    position: relative;
    z-index: 100;
    box-shadow: 0 2px 16px var(--color-card-shadow);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
}
.top-banner-icon {
    font-size: 1.3rem;
    margin-right: 6px;
}
.top-banner-close {
    margin-left: 18px;
    font-size: 1.3rem;
    cursor: pointer;
    color: var(--color-btn-text);
    opacity: 0.7;
    transition: opacity 0.2s;
}
.top-banner-close:hover {
    opacity: 1;
}
.svg-tech-lines {
    width: 100%;
    margin: 0 auto 0 auto;
    background: transparent;
    position: relative;
    z-index: 5;
    min-height: 30px;
    display: flex;
    align-items: flex-end;
    justify-content: center;
}
.advantages {
    margin-top: 0;
    margin-bottom: 56px;
    background: var(--color-bg-section);
    border-radius: 18px;
    box-shadow: 0 2px 16px var(--color-card-shadow);
    backdrop-filter: blur(4px);
    padding-top: 36px;
    padding-bottom: 36px;
}
.advantage-list {
    display: flex;
    gap: 36px;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 18px;
}
.advantage-item {
    background: var(--color-bg-card);
    border-radius: 16px;
    padding: 32px 24px 24px 24px;
    min-width: 180px;
    max-width: 260px;
    box-shadow: 0 2px 12px var(--color-card-shadow);
    text-align: center;
    color: var(--color-text);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}
.advantage-item img {
    margin-bottom: 8px;
    filter: drop-shadow(0 2px 8px var(--color-card-shadow));
}
.advantage-item h4 {
    color: var(--color-title);
    margin-bottom: 6px;
    font-size: 1.15rem;
    font-weight: 700;
}
.advantage-item p {
    margin: 0;
    color: var(--color-text-light);
    font-size: 1rem;
}
@media (max-width: 900px) {
    .advantage-list {
        gap: 14px;
    }
    .advantage-item {
        min-width: 120px;
        max-width: 100vw;
        padding: 18px 8px 12px 8px;
    }
}

.knowledge-list, .news-list {
    display: flex;
    flex-wrap: wrap;
    gap: 32px;
    justify-content: center;
    align-items: stretch;
    max-width: 1100px;
    margin: 0 auto;
}
.knowledge-item, .news-item {
    flex: 0 0 calc((100% - 64px) / 3);
    max-width: calc((100% - 64px) / 3);
}
.knowledge-item h4 {
    color: var(--color-title);
    margin-bottom: 8px;
    font-size: 1.08rem;
    font-weight: 700;
}
.knowledge-item p {
    margin: 0;
    color: var(--color-text-light);
    font-size: 1rem;
}
.news-item h4 {
    color: var(--color-title);
    margin-bottom: 8px;
    font-size: 1.08rem;
    font-weight: 700;
}
.news-item p {
    margin: 0 0 8px 0;
    color: var(--color-text-light);
    font-size: 1rem;
}
.news-item .news-date {
    color: var(--color-text-light);
    margin-bottom: 0;
    margin-top: 2px;
    font-size: 0.98rem;
    line-height: 1.5;
    display: block;
    font-weight: 400;
}
.news-item .news-summary {
    color: var(--color-text);
    margin-top: 8px;
    font-size: 1.05rem;
    line-height: 1.8;
    word-break: break-all;
}
.news-item a {
    margin-bottom: 0;
}
.back-to-top {
    position: fixed;
    right: 32px;
    bottom: 32px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--color-btn-bg);
    color: var(--color-btn-text);
    font-size: 2rem;
    font-weight: bold;
    border: none;
    box-shadow: 0 4px 24px var(--color-card-shadow);
    cursor: pointer;
    z-index: 999;
    transition: background 0.2s, box-shadow 0.2s, transform 0.2s, opacity 0.3s;
    outline: none;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
}
.back-to-top.show {
    opacity: 1;
    pointer-events: auto;
}
@media (max-width: 900px) {
    .knowledge-list, .news-list {
        gap: 18px;
    }
    .knowledge-item, .news-item {
        flex: 1 1 100%;
        max-width: 100%;
        min-width: 180px;
        padding: 16px 10px 12px 10px;
    }
    .back-to-top {
        right: 12px;
        bottom: 12px;
        width: 38px;
        height: 38px;
        font-size: 1.4rem;
    }
}

.faq-accordion-list {
    display: flex;
    flex-direction: column;
    gap: 18px;
    margin-top: 18px;
    align-items: center;
}
.faq-accordion-item {
    width: 100%;
    max-width: 700px;
    background: var(--color-bg-card);
    border-radius: 12px;
    box-shadow: 0 2px 12px var(--color-card-shadow);
    color: var(--color-text);
    overflow: hidden;
    transition: box-shadow 0.2s;
}
.faq-accordion-question {
    cursor: pointer;
    padding: 18px 24px;
    font-size: 1.08rem;
    color: var(--color-primary);
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: transparent;
    border: none;
    outline: none;
    transition: background 0.2s;
}
.faq-accordion-question:hover {
    background: var(--color-primary)11;
}
.faq-accordion-arrow {
    margin-left: 12px;
    font-size: 1.2rem;
    transition: transform 0.2s;
}
.faq-accordion-item.active .faq-accordion-arrow {
    transform: rotate(180deg);
}
.faq-accordion-answer {
    padding: 0 24px 18px 24px;
    color: var(--color-text-light);
    font-size: 1rem;
    display: none;
    animation: fadeInFaq 0.3s;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s cubic-bezier(.77,0,.18,1), opacity 0.35s;
    opacity: 0;
}
.faq-accordion-item.active .faq-accordion-answer {
    display: block;
    max-height: 300px;
    opacity: 1;
}
@keyframes fadeInFaq {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}
#partnerCarousel {
    display: flex;
    gap: 48px;
    justify-content: center;
    align-items: center;
    overflow: hidden;
    position: relative;
    min-height: 60px;
    margin-bottom: 0;
}
#partnerCarousel img {
    transition: transform 0.4s, opacity 0.4s;
    opacity: 0.7;
}
#partnerCarousel img.active {
    transform: scale(1.12);
    opacity: 1;
    z-index: 2;
}

.lang-switch {
    display: inline-block;
    margin-left: 24px;
    font-size: 1rem;
    color: var(--color-text-light);
    background: #16244744;
    border-radius: 16px;
    padding: 4px 16px;
    font-weight: 500;
    letter-spacing: 1px;
    cursor: pointer;
    user-select: none;
}
.lang-switch span {
    cursor: pointer;
    padding: 0 4px;
    transition: color 0.2s, font-weight 0.2s, text-shadow 0.2s;
}
.lang-switch .lang-active {
    color: var(--color-primary);
    font-weight: 700;
    text-shadow: 0 2px 8px var(--color-card-shadow);
}
.lang-switch span:hover {
    color: var(--color-primary);
}
.cases-carousel-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0;
    position: relative;
    margin-top: 18px;
}
.cases-carousel-list {
    display: flex;
    gap: 32px;
    transition: transform 0.5s cubic-bezier(.77,0,.18,1);
    min-width: 0;
    overflow: hidden;
    width: 900px;
    max-width: 100vw;
}
.case-card {
    background: var(--color-bg-card);
    border-radius: 16px;
    box-shadow: 0 2px 12px var(--color-card-shadow);
    color: var(--color-text);
    text-align: center;
    min-width: 260px;
    max-width: 260px;
    padding: 32px 18px 24px 18px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    transition: box-shadow 0.2s, transform 0.2s;
}
.case-card img {
    margin-bottom: 8px;
    filter: drop-shadow(0 2px 8px var(--color-card-shadow));
}
.case-card h4 {
    color: var(--color-title);
    margin-bottom: 6px;
    font-size: 1.1rem;
    font-weight: 700;
}
.case-card p {
    margin: 0;
    color: var(--color-text-light);
    font-size: 1rem;
}
.cases-arrow {
    background: var(--color-btn-bg);
    color: var(--color-btn-text);
    border: none;
    border-radius: 50%;
    width: 38px;
    height: 38px;
    font-size: 1.6rem;
    font-weight: bold;
    box-shadow: 0 2px 8px var(--color-card-shadow);
    cursor: pointer;
    margin: 0 12px;
    transition: background 0.2s, box-shadow 0.2s, transform 0.2s;
    outline: none;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2;
}
.cases-arrow:hover {
    background: var(--color-btn-bg-hover);
    box-shadow: 0 4px 16px var(--color-card-shadow);
    transform: scale(1.08);
}
@media (max-width: 1100px) {
    .cases-carousel-list {
        width: 660px;
        gap: 18px;
    }
    .case-card {
        min-width: 210px;
        max-width: 210px;
    }
}
@media (max-width: 700px) {
    .cases-carousel-list {
        width: 260px;
        gap: 0;
    }
    .case-card {
        min-width: 100vw;
        max-width: 100vw;
    }
}

.cases-more-btn {
    display: block;
    margin: 28px auto 0 auto;
    background: var(--color-btn-bg);
    color: var(--color-btn-text);
    padding: 12px 38px;
    border-radius: 24px;
    font-size: 1.08rem;
    font-weight: 700;
    border: none;
    box-shadow: 0 2px 8px var(--color-card-shadow);
    cursor: pointer;
    transition: background 0.2s, box-shadow 0.2s, transform 0.2s;
}
.cases-more-btn:hover {
    background: var(--color-btn-bg-hover);
    box-shadow: 0 4px 16px var(--color-card-shadow);
    transform: scale(1.04);
}

.theme-switch {
    background: linear-gradient(135deg, #162447 0%, #3fa7ff 100%);
    color: var(--color-btn-text);
    border: none;
    border-radius: 50%;
    width: 38px;
    height: 38px;
    font-size: 1.3rem;
    margin-left: 18px;
    box-shadow: 0 2px 8px var(--color-card-shadow);
    cursor: pointer;
    transition: background 0.2s, box-shadow 0.2s, transform 0.2s;
    outline: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    vertical-align: middle;
}
.theme-switch:hover {
    background: linear-gradient(135deg, #3fa7ff 0%, #1e7ed6 100%);
    box-shadow: 0 4px 16px var(--color-card-shadow);
    transform: scale(1.08);
}

.faq-accordion.container {
    margin-bottom: 56px;
}

.cases-carousel.container,
.advantages.container,
.cases.container,
.testimonials.container,
.faq-accordion.container,
.partners.container,
.flow.container,
.safe-news.container,
.links.container {
    margin-bottom: 56px;
}
footer.container {
    margin-top: 56px;
}

.news-list {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    justify-content: flex-start;
}
.news-item {
    background: var(--color-bg-card);
    border-radius: 14px;
    padding: 18px 12px 12px 12px;
    box-shadow: 0 2px 12px var(--color-card-shadow);
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    width: calc(20% - 13px);
    min-width: 120px;
    max-width: 200px;
    box-sizing: border-box;
    margin-bottom: 12px;
    transition: box-shadow 0.2s, transform 0.2s;
}
.news-item:hover {
    box-shadow: 0 8px 32px var(--color-card-shadow);
    transform: translateY(-6px) scale(1.03);
}
.news-item a {
    text-decoration: none;
    color: var(--color-title);
    font-size: 1.18rem;
    font-weight: 700;
    margin-bottom: 10px;
    display: block;
    width: 100%;
    word-break: break-all;
}
.news-item .news-date {
    color: var(--color-text-light);
    margin-bottom: 0;
    margin-top: 2px;
    font-size: 0.98rem;
    line-height: 1.5;
}
.news-item .news-summary {
    color: var(--color-text);
    margin-top: 8px;
    font-size: 1.05rem;
    line-height: 1.8;
    word-break: break-all;
}
@media (max-width: 900px) {
    .news-list {
        flex-direction: column;
        gap: 12px;
        max-width: 98vw;
        padding: 0 2px;
    }
    .news-item {
        width: 100%;
        min-width: 0;
        max-width: 100vw;
        padding: 12px 4px 8px 4px;
    }
}

.safe-news-list {
    display: flex;
    flex-wrap: wrap;
    gap: 32px;
    justify-content: center;
    align-items: stretch;
    max-width: 1100px;
    margin: 0 auto;
}
.safe-news-card {
    background: var(--color-bg-card);
    border-radius: 16px;
    box-shadow: 0 2px 12px var(--color-card-shadow);
    color: var(--color-text);
    text-align: left;
    flex: 0 0 calc((100% - 64px) / 3);
    max-width: calc((100% - 64px) / 3);
    min-width: 220px;
    padding: 28px 20px 20px 20px;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    align-items: flex-start;
    transition: box-shadow 0.2s, transform 0.2s;
}
.safe-news-card h4 {
    color: var(--color-title);
    margin-bottom: 10px;
    font-size: 1.08rem;
    font-weight: 700;
}
.safe-news-card p {
    margin: 0;
    color: var(--color-text-light);
    font-size: 1rem;
}
.safe-news-card:hover {
    box-shadow: 0 8px 32px var(--color-card-shadow);
    transform: translateY(-6px) scale(1.03);
}
@media (max-width: 900px) {
    .safe-news-list {
        gap: 14px;
    }
    .safe-news-card {
        flex: 1 1 100%;
        max-width: 100%;
        min-width: 0;
        padding: 16px 10px 12px 10px;
    }
}
.safe-news-link {
    color: var(--color-title);
    text-decoration: none;
    transition: color 0.2s, text-shadow 0.2s;
}
.safe-news-link:hover {
    color: var(--color-primary);
    text-shadow: 0 2px 8px var(--color-card-shadow);
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(24px); }
    to { opacity: 1; transform: translateY(0); }
}
.product-item, .case-card, .safe-news-card, .btn-primary {
    animation: fadeInUp 0.7s cubic-bezier(.77,0,.18,1) both;
}

.online-customer-service {
    position: fixed;
    right: 32px;
    bottom: 96px;
    z-index: 1001;
    display: flex;
    align-items: center;
    gap: 10px;
    background: linear-gradient(90deg, #3fa7ff 0%, #7f8fff 100%);
    color: #fff;
    font-weight: 600;
    font-size: 1.08rem;
    padding: 12px 22px 12px 16px;
    border-radius: 28px 12px 28px 28px;
    box-shadow: 0 4px 24px var(--color-card-shadow);
    text-decoration: none;
    transition: background 0.2s, box-shadow 0.2s, transform 0.2s;
    cursor: pointer;
    opacity: 0.96;
}
.online-customer-service:hover {
    background: linear-gradient(90deg, #1e7ed6 0%, #3fa7ff 100%);
    box-shadow: 0 8px 32px var(--color-card-shadow);
    transform: translateY(-4px) scale(1.04);
    opacity: 1;
}
.online-customer-service svg {
    flex-shrink: 0;
    filter: drop-shadow(0 2px 8px #3fa7ff44);
}
@media (max-width: 900px) {
    .online-customer-service {
        right: 10px;
        bottom: 70px;
        padding: 10px 14px 10px 10px;
        font-size: 0.98rem;
    }
    .online-customer-service span {
        display: none;
    }
}

.nav-links a.active {
    color: var(--color-primary);
    font-weight: 700;
    position: relative;
}
.nav-links a.active::after {
    content: '';
    display: block;
    width: 32px;
    height: 3px;
    background: linear-gradient(90deg, #3fa7ff 0%, #7f8fff 100%);
    border-radius: 2px;
    margin: 6px auto 0 auto;
}