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

body {
    font-family: "Microsoft YaHei", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
    color: #333;
    line-height: 1.6;
    background: #f5f7fa;
}

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

ul, ol {
    list-style: none;
}

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

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

/* ========== Header ========== */
.header {
    background: #fff;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
    position: sticky;
    top: 0;
    z-index: 1000;
}

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

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

.logo-img {
    height: 44px;
    width: auto;
}

.logo-text {
    font-size: 22px;
    font-weight: 700;
    color: #1a1a2e;
    letter-spacing: 1px;
}

.logo-text span {
    color: #1a73e8;
}

.nav-list {
    display: flex;
    gap: 36px;
}

.nav-list a {
    font-size: 15px;
    color: #555;
    padding: 8px 0;
    position: relative;
    transition: color 0.3s;
    font-weight: 500;
}

.nav-list a:hover,
.nav-list a.active {
    color: #1a73e8;
}

.nav-list a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: #1a73e8;
    transition: width 0.3s;
}

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

.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    background: none;
    border: none;
    padding: 8px;
}

.mobile-toggle span {
    display: block;
    width: 26px;
    height: 2px;
    background: #333;
    border-radius: 2px;
    transition: all 0.3s;
}

/* ========== Banner ========== */
.banner {
    background: linear-gradient(135deg, #0d47a1 0%, #1a73e8 50%, #4fc3f7 100%);
    color: #fff;
    padding: 100px 0 80px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.banner::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 50%;
}

.banner::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 400px;
    height: 400px;
    background: rgba(255, 255, 255, 0.04);
    border-radius: 50%;
}

.banner-content {
    position: relative;
    z-index: 1;
}

.banner h1 {
    font-size: 44px;
    font-weight: 700;
    margin-bottom: 18px;
    letter-spacing: 2px;
}

.banner p {
    font-size: 18px;
    opacity: 0.9;
    max-width: 700px;
    margin: 0 auto 36px;
    line-height: 1.8;
}

.banner-btns {
    display: flex;
    gap: 18px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-block;
    padding: 14px 36px;
    border-radius: 30px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    border: none;
    letter-spacing: 1px;
}

.btn-primary {
    background: #fff;
    color: #1a73e8;
}

.btn-primary:hover {
    background: #e8f0fe;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
}

.btn-outline {
    background: transparent;
    color: #fff;
    border: 2px solid rgba(255, 255, 255, 0.7);
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: #fff;
    transform: translateY(-2px);
}

/* ========== Section Common ========== */
.section {
    padding: 80px 0;
}

.section-title {
    text-align: center;
    margin-bottom: 56px;
}

.section-title h2 {
    font-size: 34px;
    color: #1a1a2e;
    margin-bottom: 12px;
    letter-spacing: 1px;
}

.section-title p {
    font-size: 16px;
    color: #888;
    max-width: 600px;
    margin: 0 auto;
}

.divider {
    width: 60px;
    height: 3px;
    background: #1a73e8;
    margin: 16px auto 0;
    border-radius: 2px;
}

/* ========== Stats ========== */
.stats-section {
    background: #fff;
    padding: 50px 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    text-align: center;
}

.stat-item {
    padding: 20px;
}

.stat-num {
    font-size: 42px;
    font-weight: 700;
    color: #1a73e8;
    margin-bottom: 8px;
}

.stat-label {
    font-size: 15px;
    color: #888;
}

/* ========== Service Cards ========== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.service-card {
    background: #fff;
    border-radius: 12px;
    padding: 40px 30px;
    text-align: center;
    transition: all 0.3s;
    box-shadow: 0 2px 16px rgba(0, 0, 0, 0.06);
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
}

.service-icon {
    width: 72px;
    height: 72px;
    margin: 0 auto 24px;
    background: linear-gradient(135deg, #e8f0fe, #bbdefb);
    border-radius: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
}

.service-card h3 {
    font-size: 20px;
    color: #1a1a2e;
    margin-bottom: 14px;
}

.service-card p {
    font-size: 14px;
    color: #777;
    line-height: 1.8;
    margin-bottom: 20px;
}

.service-link {
    color: #1a73e8;
    font-weight: 600;
    font-size: 14px;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: gap 0.3s;
}

.service-link:hover {
    gap: 12px;
}

/* ========== Features ========== */
.features-section {
    background: #fff;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
    align-items: center;
}

.feature-img {
    border-radius: 12px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #f0f4f8;
}

.feature-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    min-height: 300px;
}

.feature-content h3 {
    font-size: 28px;
    color: #1a1a2e;
    margin-bottom: 16px;
}

.feature-content p {
    font-size: 15px;
    color: #666;
    line-height: 1.9;
    margin-bottom: 20px;
}

.feature-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.feature-list li {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 15px;
    color: #555;
}

.feature-list li::before {
    content: '✓';
    display: flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    background: #e8f5e9;
    color: #2e7d32;
    border-radius: 50%;
    font-size: 12px;
    font-weight: bold;
    flex-shrink: 0;
}

/* ========== Page Header ========== */
.page-header {
    background: linear-gradient(135deg, #0d47a1, #1a73e8);
    color: #fff;
    padding: 60px 0;
    text-align: center;
}

.page-header h1 {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 10px;
}

.page-header p {
    font-size: 16px;
    opacity: 0.85;
}

/* ========== Service Detail ========== */
.service-detail {
    padding: 80px 0;
}

.service-detail-grid {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 50px;
    align-items: start;
}

.service-detail-img {
    border-radius: 16px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #f0f4f8;
    position: sticky;
    top: 100px;
}

.service-detail-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    min-height: 350px;
}

.service-detail-body h2 {
    font-size: 30px;
    color: #1a1a2e;
    margin-bottom: 20px;
}

.service-detail-body h3 {
    font-size: 20px;
    color: #1a73e8;
    margin: 28px 0 14px;
}

.service-detail-body p {
    font-size: 15px;
    color: #666;
    line-height: 1.9;
    margin-bottom: 16px;
}

.service-detail-body ul {
    margin-bottom: 16px;
}

.service-detail-body ul li {
    position: relative;
    padding-left: 24px;
    margin-bottom: 10px;
    font-size: 15px;
    color: #555;
    line-height: 1.8;
}

.service-detail-body ul li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 10px;
    width: 8px;
    height: 8px;
    background: #1a73e8;
    border-radius: 50%;
}

/* ========== Products Grid ========== */
.products-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.product-card {
    background: #fff;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 2px 16px rgba(0, 0, 0, 0.06);
    transition: all 0.3s;
}

.product-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
}

.product-img {
    height: 220px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #f0f4f8;
}

.product-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.product-info {
    padding: 24px 20px;
}

.product-info h3 {
    font-size: 18px;
    color: #1a1a2e;
    margin-bottom: 10px;
}

.product-info p {
    font-size: 14px;
    color: #777;
    line-height: 1.7;
    margin-bottom: 16px;
}

.product-tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.tag {
    display: inline-block;
    padding: 4px 12px;
    background: #e8f0fe;
    color: #1a73e8;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
}

/* ========== Contact Page ========== */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 50px;
}

.contact-info-card {
    background: #fff;
    border-radius: 12px;
    padding: 36px 30px;
    box-shadow: 0 2px 16px rgba(0, 0, 0, 0.06);
}

.contact-info-card h3 {
    font-size: 22px;
    color: #1a1a2e;
    margin-bottom: 28px;
}

.contact-item {
    display: flex;
    gap: 16px;
    margin-bottom: 24px;
}

.contact-item-icon {
    width: 44px;
    height: 44px;
    background: #e8f0fe;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    flex-shrink: 0;
}

.contact-item-text h4 {
    font-size: 15px;
    color: #1a1a2e;
    margin-bottom: 4px;
}

.contact-item-text p {
    font-size: 14px;
    color: #888;
}

.contact-form {
    background: #fff;
    border-radius: 12px;
    padding: 36px 30px;
    box-shadow: 0 2px 16px rgba(0, 0, 0, 0.06);
}

.contact-form h3 {
    font-size: 22px;
    color: #1a1a2e;
    margin-bottom: 28px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 14px;
    color: #555;
    margin-bottom: 8px;
    font-weight: 500;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    font-size: 15px;
    font-family: inherit;
    transition: border-color 0.3s;
    background: #fafbfc;
    color: #333;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: #1a73e8;
    background: #fff;
    box-shadow: 0 0 0 3px rgba(26, 115, 232, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 140px;
}

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

.btn-submit {
    width: 100%;
    padding: 14px;
    background: #1a73e8;
    color: #fff;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-submit:hover {
    background: #1557b0;
    box-shadow: 0 4px 16px rgba(26, 115, 232, 0.3);
}

/* ========== Footer ========== */
.footer {
    background: #1a1a2e;
    color: #bbb;
    padding: 56px 0 28px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-about h3 {
    color: #fff;
    font-size: 20px;
    margin-bottom: 16px;
}

.footer-about p {
    font-size: 14px;
    line-height: 1.8;
}

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

.footer-col ul li {
    margin-bottom: 10px;
}

.footer-col ul li a {
    font-size: 14px;
    color: #bbb;
    transition: color 0.3s;
}

.footer-col ul li a:hover {
    color: #fff;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 24px;
    text-align: center;
    font-size: 13px;
    color: #888;
}

/* ========== Process Steps ========== */
.process-steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-top: 40px;
}

.process-step {
    text-align: center;
    position: relative;
}

.process-step::after {
    content: '→';
    position: absolute;
    top: 28px;
    right: -18px;
    font-size: 20px;
    color: #ccc;
    font-weight: bold;
}

.process-step:last-child::after {
    display: none;
}

.process-step-num {
    width: 56px;
    height: 56px;
    margin: 0 auto 14px;
    background: linear-gradient(135deg, #1a73e8, #0d47a1);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    font-weight: 700;
}

.process-step h4 {
    font-size: 16px;
    color: #1a1a2e;
    margin-bottom: 6px;
}

.process-step p {
    font-size: 13px;
    color: #888;
}

/* ========== Platform Badges ========== */
.platform-badges {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
    justify-content: center;
    margin-top: 24px;
}

.platform-badge {
    display: flex;
    align-items: center;
    gap: 10px;
    background: #fff;
    padding: 14px 24px;
    border-radius: 10px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
    font-weight: 600;
    font-size: 16px;
    color: #1a1a2e;
}

.platform-badge .icon {
    font-size: 28px;
}

/* ========== CTA ========== */
.cta-section {
    background: linear-gradient(135deg, #0d47a1, #1a73e8);
    color: #fff;
    text-align: center;
    padding: 70px 0;
}

.cta-section h2 {
    font-size: 32px;
    margin-bottom: 14px;
}

.cta-section p {
    font-size: 16px;
    opacity: 0.9;
    margin-bottom: 30px;
}

/* ========== About Section ========== */
.about-section {
    background: #fff;
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

.about-text h3 {
    font-size: 24px;
    color: #1a1a2e;
    margin-bottom: 18px;
}

.about-text p {
    font-size: 15px;
    color: #666;
    line-height: 1.9;
    margin-bottom: 14px;
}

.about-highlights {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-top: 24px;
}

.about-highlight-item {
    text-align: center;
    padding: 16px 10px;
    background: #f5f7fa;
    border-radius: 8px;
}

.about-highlight-item .num {
    font-size: 28px;
    font-weight: 700;
    color: #1a73e8;
    display: block;
}

.about-highlight-item .label {
    font-size: 13px;
    color: #888;
    margin-top: 4px;
}

/* ========== News Section ========== */
.news-section {
    background: #f5f7fa;
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.news-card {
    background: #fff;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.05);
    transition: all 0.3s;
}

.news-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 6px 24px rgba(0, 0, 0, 0.1);
}

.news-thumb {
    height: 180px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #e8f0fe, #bbdefb);
}

.news-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.news-body {
    padding: 20px 18px;
}

.news-date {
    font-size: 12px;
    color: #aaa;
    margin-bottom: 8px;
}

.news-body h4 {
    font-size: 16px;
    color: #1a1a2e;
    margin-bottom: 10px;
    line-height: 1.5;
}

.news-body p {
    font-size: 13px;
    color: #888;
    line-height: 1.7;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* ========== Timeline Section ========== */
.timeline-section {
    background: #fff;
}

.timeline {
    position: relative;
    padding: 20px 0;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 3px;
    background: linear-gradient(to bottom, #1a73e8, #4fc3f7);
    transform: translateX(-50%);
    border-radius: 2px;
}

.timeline-item {
    position: relative;
    display: flex;
    align-items: flex-start;
    margin-bottom: 48px;
}

.timeline-item:last-child {
    margin-bottom: 0;
}

.timeline-item:nth-child(odd) {
    flex-direction: row;
    padding-right: calc(50% + 40px);
    text-align: right;
}

.timeline-item:nth-child(even) {
    flex-direction: row-reverse;
    padding-left: calc(50% + 40px);
    text-align: left;
}

.timeline-dot {
    position: absolute;
    left: 50%;
    top: 6px;
    width: 18px;
    height: 18px;
    background: #fff;
    border: 3px solid #1a73e8;
    border-radius: 50%;
    transform: translateX(-50%);
    z-index: 2;
    box-shadow: 0 0 0 4px rgba(26, 115, 232, 0.12);
}

.timeline-content {
    flex: 1;
}

.timeline-year {
    display: inline-block;
    padding: 4px 16px;
    background: linear-gradient(135deg, #1a73e8, #0d47a1);
    color: #fff;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 700;
    margin-bottom: 10px;
}

.timeline-content h4 {
    font-size: 18px;
    color: #1a1a2e;
    margin-bottom: 8px;
}

.timeline-content p {
    font-size: 14px;
    color: #777;
    line-height: 1.7;
}

@media (max-width: 992px) {
    .timeline::before {
        left: 20px;
    }

    .timeline-item,
    .timeline-item:nth-child(odd),
    .timeline-item:nth-child(even) {
        flex-direction: row;
        padding-left: 56px;
        padding-right: 0;
        text-align: left;
    }

    .timeline-dot {
        left: 20px;
    }
}

/* ========== Responsive ========== */
@media (max-width: 992px) {
    .services-grid,
    .products-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

    .service-detail-grid {
        grid-template-columns: 1fr;
    }

    .service-detail-img {
        position: static;
        min-height: 200px;
    }

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

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

    .process-steps {
        grid-template-columns: repeat(2, 1fr);
    }

    .process-step::after {
        display: none;
    }

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

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

    .news-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-list {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #fff;
        flex-direction: column;
        padding: 20px;
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
        gap: 0;
    }

    .nav-list.active {
        display: flex;
    }

    .nav-list a {
        padding: 14px 0;
        border-bottom: 1px solid #f0f0f0;
    }

    .mobile-toggle {
        display: flex;
    }

    .banner h1 {
        font-size: 30px;
    }

    .banner p {
        font-size: 15px;
    }

    .section-title h2 {
        font-size: 26px;
    }

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

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

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

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

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

    .banner {
        padding: 60px 0 50px;
    }
}