/* ===== Navigation ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    background: var(--bg-surface);
    border-bottom: 1px solid var(--border);
    z-index: 1000;
}

.navbar.scrolled {
    box-shadow: var(--shadow-sm);
}

.nav-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-lg);
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.logo-img {
    width: 42px;
    height: 42px;
    object-fit: contain;
}

.logo-main {
    display: flex;
    flex-direction: column;
    line-height: 1.3;
}

.logo-text-cn {
    font-size: var(--font-size-md);
    font-weight: 700;
    color: var(--primary);
    letter-spacing: 0.3px;
}

.logo-text-en {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    letter-spacing: 0.6px;
    text-transform: uppercase;
}

.logo-text-cn-short,
.logo-text-en-short {
    display: none;
}

.nav-contact-panel {
    display: none;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
}

.nav-item {
    position: relative;
    list-style: none;
}

.nav-item-row {
    display: flex;
    align-items: center;
}

.nav-link {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    font-weight: 400;
    transition: var(--transition);
    position: relative;
    padding: 4px 0;
    white-space: nowrap;
}

button.nav-link {
    appearance: none;
    border: none;
    background: none;
    font: inherit;
    cursor: pointer;
    text-align: inherit;
    font-weight: inherit;
    letter-spacing: inherit;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: width 0.2s ease;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary);
}

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

.nav-submenu-toggle {
    display: none;
}

.nav-submenu {
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-sublink {
    display: block;
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
}

@media (min-width: 768px) {
    .nav-menu {
        align-self: stretch;
        align-items: stretch;
    }

    .nav-item.has-submenu {
        display: flex;
        align-items: center;
    }

    .nav-item:not(.has-submenu) {
        display: flex;
        align-items: center;
    }

    /* Dropdown parents: underline when on that section; hide while panel is open */
    .nav-item.has-submenu > .nav-item-row > .nav-link:hover::after {
        width: 0;
    }

    .nav-item.has-submenu > .nav-item-row > .nav-link.active::after {
        width: 100%;
    }

    .nav-item.has-submenu:hover > .nav-item-row > .nav-link::after,
    .nav-item.has-submenu:focus-within > .nav-item-row > .nav-link::after {
        width: 0;
    }

    .nav-item.has-submenu > .nav-item-row > .nav-link:hover,
    .nav-item.has-submenu > .nav-item-row > .nav-link.active,
    .nav-item.has-submenu:hover > .nav-item-row > .nav-link,
    .nav-item.has-submenu:focus-within > .nav-item-row > .nav-link {
        color: var(--primary);
        font-weight: 500;
    }

    /* Invisible bridge so cursor can reach dropdown without closing */
    .nav-item.has-submenu::before {
        content: '';
        position: absolute;
        left: 0;
        right: 0;
        top: 100%;
        height: 18px;
        z-index: 1000;
    }

    /* Upward caret — always centered on parent item */
    .nav-item.has-submenu::after {
        content: '';
        position: absolute;
        left: 50%;
        top: 100%;
        width: 0;
        height: 0;
        border-left: 8px solid transparent;
        border-right: 8px solid transparent;
        border-bottom: 7px solid var(--bg-surface);
        transform: translateX(-50%) translateY(6px);
        opacity: 0;
        visibility: hidden;
        pointer-events: none;
        filter: drop-shadow(0 -2px 2px rgba(15, 23, 42, 0.06));
        transition: opacity 0.22s ease-out, visibility 0.22s ease-out, transform 0.22s ease-out;
        z-index: 1002;
    }

    .nav-item.has-submenu:hover::after,
    .nav-item.has-submenu:focus-within::after {
        opacity: 1;
        visibility: visible;
        transform: translateX(-50%) translateY(0);
    }

    .nav-submenu {
        position: absolute;
        top: calc(100% + 7px);
        left: 50%;
        transform: translateX(-50%) translateY(6px);
        min-width: 100%;
        width: max-content;
        max-width: min(24rem, calc(100vw - var(--space-lg) * 2));
        padding: var(--space-sm) 0 0;
        background: var(--bg-surface);
        border: none;
        border-bottom: 2px solid transparent;
        border-radius: 0;
        box-shadow:
            0 12px 32px rgba(15, 23, 42, 0.08),
            0 2px 6px rgba(15, 23, 42, 0.04);
        opacity: 0;
        visibility: hidden;
        pointer-events: none;
        transition:
            opacity 0.22s ease-out,
            visibility 0.22s ease-out,
            transform 0.22s ease-out,
            border-bottom-color 0.18s ease-out;
        z-index: 1001;
    }

    /* Right-edge items: align panel inward so it stays on screen */
    .nav-item.has-submenu:nth-last-child(-n+2) .nav-submenu {
        left: auto;
        right: 0;
        transform: translateY(6px);
    }

    .nav-item.has-submenu:hover .nav-submenu,
    .nav-item.has-submenu:focus-within .nav-submenu {
        opacity: 1;
        visibility: visible;
        pointer-events: auto;
        transform: translateX(-50%) translateY(0);
    }

    .nav-item.has-submenu:nth-last-child(-n+2):hover .nav-submenu,
    .nav-item.has-submenu:nth-last-child(-n+2):focus-within .nav-submenu {
        transform: translateY(0);
    }

    .nav-menu .nav-submenu .nav-sublink {
        position: relative;
        display: block;
        padding: 0.7rem var(--space-xl);
        font-size: var(--font-size-sm);
        line-height: 1.55;
        font-weight: 400;
        color: var(--text-secondary);
        white-space: normal;
        border-left: none;
        border-bottom: 2px solid transparent;
        box-shadow: none;
        transition:
            color 0.2s ease-out,
            background-color 0.2s ease-out,
            border-color 0.2s ease-out;
    }

    .nav-submenu li + li .nav-sublink {
        border-top: 1px solid rgba(226, 232, 240, 0.65);
    }

    .nav-menu .nav-submenu .nav-sublink:hover,
    .nav-menu .nav-submenu .nav-sublink:focus-visible,
    .nav-menu .nav-submenu .nav-sublink.is-sublink-active,
    .nav-menu .nav-submenu:not(.has-sublink-hover):not(:has(.nav-sublink:hover)):not(:has(.nav-sublink:focus-visible)) .nav-sublink.active {
        color: var(--primary);
        background: rgba(27, 65, 156, 0.1);
        border-left: none;
        border-bottom-color: var(--primary);
        box-shadow: none;
    }

    .nav-menu .nav-submenu .nav-sublink:focus-visible {
        outline: none;
    }

    @media (prefers-reduced-motion: reduce) {
        .nav-item.has-submenu::after {
            transition: opacity 0.01ms, visibility 0.01ms;
            transform: translateX(-50%);
        }

        .nav-item.has-submenu:hover::after,
        .nav-item.has-submenu:focus-within::after {
            transform: translateX(-50%);
        }

        .nav-submenu {
            transition: opacity 0.01ms, visibility 0.01ms;
            transform: translateX(-50%);
        }

        .nav-item.has-submenu:nth-last-child(-n+2) .nav-submenu {
            transform: none;
        }

        .nav-item.has-submenu:hover .nav-submenu,
        .nav-item.has-submenu:focus-within .nav-submenu {
            transform: translateX(-50%);
        }

        .nav-item.has-submenu:nth-last-child(-n+2):hover .nav-submenu,
        .nav-item.has-submenu:nth-last-child(-n+2):focus-within .nav-submenu {
            transform: none;
        }
    }
}

.nav-right {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.lang-switch {
    display: flex;
    align-items: center;
    gap: 2px;
    background: var(--bg-page);
    border-radius: var(--radius);
    padding: 2px;
    border: 1px solid var(--border);
}

.lang-btn {
    padding: 4px 12px;
    border: none;
    background: transparent;
    color: var(--text-muted);
    font-size: var(--font-size-xs);
    cursor: pointer;
    border-radius: var(--radius);
    font-weight: 500;
}

.lang-btn.active {
    background: var(--primary);
    color: var(--bg-surface);
}

.hamburger {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 6px;
    cursor: pointer;
    width: 44px;
    height: 44px;
    padding: 10px;
    border: none;
    background: transparent;
    border-radius: var(--radius);
    transition: background-color 0.2s ease-out;
}

.hamburger:hover {
    background: var(--bg-page);
}

.hamburger span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 1px;
    transition: transform 0.2s ease-out, opacity 0.2s ease-out;
}

.hamburger.active span:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
}

.nav-backdrop {
    display: none;
}

body.nav-open {
    overflow: hidden;
}

.scroll-to-top {
    display: none;
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: 12px 28px;
    font-size: var(--font-size-md);
    font-weight: 500;
    cursor: pointer;
    border-radius: var(--radius);
    border: 1px solid transparent;
    transition: var(--transition);
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
}

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

.btn-outline:hover {
    background: var(--primary);
    color: var(--bg-surface);
}

.btn-accent {
    background: var(--accent);
    color: var(--bg-surface);
    border-color: var(--accent);
}

.btn-accent:hover {
    background: #92400E;
    border-color: #92400E;
}

/* ===== Cards ===== */
.card {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
}

.card:hover {
    border-color: var(--primary);
}

.card-body {
    padding: var(--space-lg);
}

.card-title {
    font-size: var(--font-size-md);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-sm);
}

.card-text {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    line-height: 1.6;
}

/* Product card */
.product-card {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
}

.product-card:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-sm);
}

.product-image {
    width: 100%;
    height: 180px;
    aspect-ratio: 16 / 9;
    background: #E2E8F0;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    position: relative;
}

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

.product-tag {
    position: absolute;
    top: var(--space-sm);
    left: var(--space-sm);
    background: var(--primary);
    color: var(--bg-surface);
    font-size: var(--font-size-xs);
    padding: 4px 10px;
    border-radius: var(--radius);
    font-weight: 500;
}

.product-tag.accent {
    background: var(--accent);
}

.product-info {
    padding: var(--space-md);
}

.product-name {
    font-size: var(--font-size-md);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-xs);
}

.product-desc {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    line-height: 1.6;
}

/* Image placeholder (neutral, no cross-lines) */
.img-placeholder {
    width: 100%;
    height: 100%;
    min-height: 160px;
    background: #E2E8F0;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: var(--font-size-xs);
    text-align: center;
    padding: var(--space-md);
}

.img-placeholder.small {
    min-height: 80px;
}

/* Solution / application grid item */
.solution-item {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    padding: var(--space-lg) var(--space-md);
    text-align: center;
    border-radius: var(--radius);
    transition: var(--transition);
}

.solution-item:hover {
    border-color: var(--primary);
}

.solution-item .solution-label {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--text-primary);
}

/* CTA block */
.cta-block {
    background: var(--primary-dark);
    color: var(--bg-surface);
    padding: var(--space-2xl);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-lg);
    margin-top: var(--space-2xl);
}

.cta-block h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--space-xs);
}

.cta-block p {
    font-size: var(--font-size-sm);
    opacity: 0.85;
}

.cta-block .btn-outline {
    border-color: var(--bg-surface);
    color: var(--bg-surface);
    flex-shrink: 0;
}

.cta-block .btn-outline:hover {
    background: var(--bg-surface);
    color: var(--primary-dark);
}

/* ===== Footer ===== */
.footer {
    background: var(--footer-bg);
    color: var(--footer-text);
    margin-top: auto;
    border-top: none;
}

.footer-main {
    padding: var(--space-2xl) 0 var(--space-lg);
}

.footer-grid {
    display: grid;
    grid-template-columns: minmax(240px, 1.2fr) minmax(0, 2fr);
    gap: var(--space-2xl) clamp(var(--space-xl), 4vw, var(--space-3xl));
    align-items: start;
}

.footer-nav {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--space-xl) var(--space-lg);
}

.footer-nav-group {
    min-width: 0;
}

.footer-nav-heading {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--footer-heading);
    letter-spacing: 0.02em;
    padding-bottom: var(--space-sm);
    border-bottom: 1px solid var(--footer-border);
    margin-bottom: var(--space-md);
    text-decoration: none;
    line-height: 1.35;
    transition: color 0.2s ease-out, opacity 0.2s ease-out;
}

.footer-nav-heading:hover {
    color: var(--footer-link-hover);
    opacity: 0.92;
}

.footer-nav-links {
    list-style: none;
}

.footer-nav-links li {
    margin-bottom: 6px;
}

.footer-nav-links li:last-child {
    margin-bottom: 0;
}

.footer-nav-links a {
    font-size: 14px;
    font-weight: 400;
    color: var(--footer-text);
    line-height: 1.55;
    transition: color 0.2s ease-out;
}

.footer-nav-links a:hover {
    color: var(--footer-link-hover);
    text-decoration: underline;
    text-decoration-color: rgba(255, 255, 255, 0.45);
    text-underline-offset: 3px;
}

@media (min-width: 1400px) {
    .footer-nav {
        grid-template-columns: repeat(5, minmax(0, 1fr));
    }
}

@media (max-width: 1199px) {
    .footer-nav {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

.footer-brand-header {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-bottom: var(--space-md);
}

.footer-brand-logo {
    flex-shrink: 0;
    line-height: 0;
}

.footer-brand-logo img {
    width: 42px;
    height: 42px;
    object-fit: contain;
}

.footer-brand-title {
    font-size: var(--font-size-md);
    font-weight: 700;
    color: var(--footer-heading);
    line-height: 1.35;
}

.footer-brand-title span {
    display: block;
    font-size: var(--font-size-xs);
    font-weight: 400;
    color: var(--footer-muted);
    letter-spacing: 0.04em;
    text-transform: uppercase;
    margin-top: 2px;
}

.footer-desc {
    font-size: var(--font-size-sm);
    line-height: 1.75;
    color: var(--footer-text);
    margin-bottom: var(--space-md);
    max-width: 36em;
}

.footer-contact-list {
    display: flex;
    flex-direction: column;
    gap: 6px;
    font-size: var(--font-size-sm);
    line-height: 1.6;
    color: var(--footer-text);
}

.footer-contact-item {
    display: flex;
    align-items: baseline;
    gap: 0.55em;
    line-height: 1.6;
}

.footer-contact-item i {
    flex: 0 0 1.125em;
    text-align: center;
    font-size: 1em;
    color: var(--footer-muted);
    line-height: 1.6;
}

.footer-contact-item span {
    flex: 1;
    min-width: 0;
    line-height: 1.6;
}

.footer-title {
    font-size: var(--font-size-xs);
    font-weight: 500;
    color: var(--footer-muted);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    padding-bottom: var(--space-sm);
    border-bottom: 1px solid var(--footer-border);
    margin-bottom: var(--space-md);
}

.footer-links li {
    margin-bottom: 6px;
}

.footer-links a {
    font-size: var(--font-size-sm);
    color: var(--footer-text);
    transition: color 0.2s ease-out;
    line-height: 1.55;
}

.footer-links a:hover {
    color: var(--footer-link-hover);
    text-decoration: underline;
    text-decoration-color: rgba(255, 255, 255, 0.45);
    text-underline-offset: 3px;
}

.footer-bottom {
    border-top: 1px solid var(--footer-border);
    padding: var(--space-md) 0;
}

.footer-bottom .container {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: 0.35em 0.85em;
    font-size: var(--font-size-xs);
    color: var(--footer-muted);
    line-height: var(--line-height-body);
}

.footer-bottom .icp {
    color: var(--footer-muted);
    text-decoration: none;
    cursor: pointer;
}

.footer-bottom .icp:hover,
.footer-bottom .icp:focus-visible {
    color: var(--footer-muted);
}

/* ===== Forms ===== */
.form-group {
    margin-bottom: var(--space-md);
}

.form-group label {
    display: block;
    font-size: var(--font-size-md);
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: var(--space-xs);
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-family: inherit;
    font-size: var(--font-size-base);
    line-height: var(--line-height-body);
    background: var(--bg-surface);
    transition: var(--transition);
}

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

/* ===== Pagination ===== */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--space-sm);
    margin-top: var(--space-xl);
    padding-top: var(--space-lg);
    border-top: 1px solid var(--border);
    flex-wrap: wrap;
}

.pagination-btn {
    padding: var(--space-sm) var(--space-md);
    border: 1px solid var(--border);
    background: var(--bg-surface);
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    cursor: pointer;
    border-radius: var(--radius);
    min-width: 36px;
    text-align: center;
    transition: var(--transition);
}

.pagination-btn:hover:not(:disabled) {
    border-color: var(--primary);
    color: var(--primary);
}

.pagination-btn.active {
    background: var(--primary);
    color: var(--bg-surface);
    border-color: var(--primary);
}

.pagination-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.pagination-info {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
}

.pagination-pages {
    display: flex;
    gap: var(--space-xs);
    align-items: center;
}

/* ===== Responsive nav ===== */
@media (max-width: 991px) {
    .logo-text-cn,
    .logo-text-en {
        display: none;
    }

    .logo-text-cn-short,
    .logo-text-en-short {
        display: block;
    }

    .footer-grid {
        display: flex;
        flex-direction: column;
        gap: var(--space-xl);
    }

    .footer-brand {
        grid-column: unset;
    }

    .footer-nav {
        width: 100%;
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .footer-column {
        display: block;
        width: 100%;
        min-width: 0;
        flex: 0 0 auto;
    }

    .footer-desc {
        display: block;
    }
}

@media (max-width: 767px) {
    .nav-backdrop {
        position: fixed;
        top: var(--nav-height);
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(15, 23, 42, 0.5);
        z-index: 999;
        opacity: 0;
        visibility: hidden;
        transition: opacity 0.2s ease-out, visibility 0.2s ease-out;
    }

    .nav-backdrop.active {
        display: block;
        opacity: 1;
        visibility: visible;
    }

    .nav-menu {
        display: flex;
        position: fixed;
        top: var(--nav-height);
        left: 0;
        right: 0;
        bottom: 0;
        flex-direction: column;
        align-items: stretch;
        padding: 0 0 calc(var(--space-2xl) + env(safe-area-inset-bottom, 0px));
        background: var(--bg-surface);
        gap: 0;
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
        z-index: 1001;
        transform: translateY(-8px);
        opacity: 0;
        visibility: hidden;
        pointer-events: none;
        transition: transform 0.22s ease-out, opacity 0.22s ease-out, visibility 0.22s ease-out;
    }

    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
        pointer-events: auto;
    }

    .nav-menu li {
        margin: 0;
    }

    .nav-item.has-submenu {
        border-bottom: 1px solid var(--border);
    }

    .nav-item.has-submenu.is-open {
        background: var(--bg-page);
    }

    .nav-item-row {
        width: 100%;
    }

    .nav-item-row .nav-link {
        flex: 1;
        min-width: 0;
        border-bottom: none;
    }

    .nav-item.has-submenu .nav-link::before {
        display: none;
    }

    .nav-submenu-toggle {
        display: flex;
        align-items: center;
        justify-content: center;
        flex-shrink: 0;
        width: 50px;
        min-height: 50px;
        padding: 0;
        border: none;
        background: transparent;
        color: var(--text-muted);
        cursor: pointer;
        transition: color 0.2s ease-out, background-color 0.2s ease-out;
        touch-action: manipulation;
    }

    .nav-submenu-toggle:focus-visible {
        outline: 2px solid var(--primary);
        outline-offset: -2px;
    }

    .nav-item.has-submenu .nav-item-row:has(.nav-link:hover) {
        background: var(--bg-page);
    }

    .nav-item.has-submenu .nav-item-row:has(.nav-link:hover) .nav-link,
    .nav-item.has-submenu .nav-item-row:has(.nav-link:hover) .nav-submenu-toggle {
        background: transparent;
    }

    .nav-item.has-submenu .nav-item-row:has(.nav-link:hover) .nav-submenu-toggle {
        color: var(--primary);
    }

    .nav-item.has-submenu .nav-item-row:has(.nav-link.active) {
        background: rgba(27, 65, 156, 0.06);
        box-shadow: inset 3px 0 0 var(--primary);
    }

    .nav-item.has-submenu .nav-item-row:has(.nav-link.active) .nav-link,
    .nav-item.has-submenu .nav-item-row:has(.nav-link.active) .nav-submenu-toggle {
        background: transparent;
        color: var(--primary);
    }

    .nav-item.is-open .nav-submenu-toggle {
        color: var(--primary);
    }

    .nav-item.is-open .nav-submenu-toggle i {
        transform: rotate(180deg);
    }

    .nav-submenu-toggle i {
        font-size: 12px;
        transition: transform 0.2s ease-out;
    }

    .nav-submenu {
        display: none;
        padding: 0 0 var(--space-xs);
        background: var(--bg-page);
    }

    .nav-item.is-open .nav-submenu {
        display: block;
    }

    .nav-sublink {
        display: flex;
        align-items: center;
        min-height: 42px;
        padding: 6px var(--space-lg);
        font-size: var(--font-size-sm);
        color: var(--text-secondary);
        border-bottom: 1px solid var(--border);
        box-shadow: none;
        transition: color 0.2s ease-out, background-color 0.2s ease-out, box-shadow 0.2s ease-out;
    }

    .nav-submenu li:last-child .nav-sublink {
        border-bottom: none;
    }

    .nav-sublink:active,
    .nav-sublink:hover,
    .nav-sublink.is-sublink-active,
    .nav-submenu:not(.has-sublink-hover) .nav-sublink.active {
        color: var(--primary);
        background: rgba(27, 65, 156, 0.1);
        box-shadow: inset 0 -2px 0 0 var(--primary);
    }

    .nav-link {
        display: flex;
        align-items: center;
        min-height: 50px;
        padding: var(--space-sm) var(--space-lg);
        font-size: var(--font-size-base);
        font-weight: 500;
        color: var(--text-primary);
        border-bottom: 1px solid var(--border);
        width: 100%;
        transition: color 0.2s ease-out, background-color 0.2s ease-out;
    }

    .nav-link::after {
        display: none;
    }

    .nav-link:hover {
        color: var(--primary);
    }

    .nav-item:not(.has-submenu) .nav-link:hover {
        background: var(--bg-page);
    }

    .nav-link.active {
        color: var(--primary);
        box-shadow: inset 3px 0 0 var(--primary);
    }

    .nav-item:not(.has-submenu) .nav-link.active {
        background: rgba(27, 65, 156, 0.06);
    }

    .nav-item.has-submenu .nav-item-row:has(.nav-link.active) .nav-link {
        box-shadow: none;
    }

    .nav-item:not(.has-submenu) .nav-link:active {
        background: rgba(27, 65, 156, 0.1);
    }

    .nav-item.has-submenu .nav-item-row:has(.nav-link:active) {
        background: rgba(27, 65, 156, 0.1);
    }

    .nav-item.has-submenu .nav-item-row:has(.nav-link:active) .nav-link,
    .nav-item.has-submenu .nav-item-row:has(.nav-link:active) .nav-submenu-toggle {
        background: transparent;
    }

    .nav-item:not(.has-submenu) .nav-link {
        border-bottom: 1px solid var(--border);
    }

    .nav-contact-panel {
        display: block;
        padding: var(--space-md) var(--space-lg) calc(var(--space-lg) + env(safe-area-inset-bottom, 0px));
        margin: 0;
        list-style: none;
    }

    .nav-contact-desc {
        font-size: var(--font-size-sm);
        line-height: 1.65;
        color: var(--text-secondary);
        margin-bottom: var(--space-md);
    }

    .nav-contact-list {
        display: flex;
        flex-direction: column;
        gap: 0;
    }

    .nav-contact-list li {
        margin: 0;
    }

    .nav-contact-link {
        display: flex;
        align-items: baseline;
        gap: 0.55em;
        min-height: 44px;
        padding: var(--space-sm) 0;
        font-size: var(--font-size-sm);
        line-height: 1.6;
        color: var(--text-secondary);
        transition: color 0.2s ease-out, background-color 0.2s ease-out;
        -webkit-tap-highlight-color: transparent;
        touch-action: manipulation;
    }

    .nav-contact-link i {
        flex: 0 0 1.125em;
        width: 1.125em;
        text-align: center;
        font-size: 1em;
        line-height: 1.6;
        color: var(--primary);
    }

    .nav-contact-link span {
        flex: 1;
        min-width: 0;
        line-height: 1.6;
    }

    .nav-contact-link:active {
        color: var(--primary);
    }

    .nav-contact-link:focus-visible {
        outline: 2px solid var(--primary);
        outline-offset: 2px;
        border-radius: var(--radius);
    }

    .hamburger {
        display: flex;
        position: relative;
        z-index: 1002;
    }

    .navbar .nav-right {
        position: relative;
        z-index: 1002;
    }

    @media (prefers-reduced-motion: reduce) {
        .nav-menu,
        .nav-backdrop,
        .hamburger span,
        .nav-submenu-toggle i {
            transition: none;
        }
    }

    .footer-main {
        display: none;
    }

    .footer-bottom {
        padding: var(--space-md) var(--space-lg) calc(var(--space-md) + env(safe-area-inset-bottom, 0px));
        text-align: center;
    }

    .cta-block {
        flex-direction: column;
        text-align: center;
    }

    .scroll-to-top {
        display: flex;
        align-items: center;
        justify-content: center;
        position: fixed;
        right: var(--space-lg);
        bottom: calc(var(--space-lg) + env(safe-area-inset-bottom, 0px));
        width: 48px;
        height: 48px;
        padding: 0;
        border: none;
        border-radius: 50%;
        background: var(--primary);
        color: var(--bg-surface);
        box-shadow: var(--shadow-md);
        cursor: pointer;
        z-index: 900;
        opacity: 0;
        visibility: hidden;
        pointer-events: none;
        transform: translateY(8px);
        transition: opacity 0.2s ease-out, visibility 0.2s ease-out, transform 0.2s ease-out, background-color 0.2s ease-out;
        touch-action: manipulation;
    }

    .scroll-to-top.is-visible {
        opacity: 1;
        visibility: visible;
        pointer-events: auto;
        transform: translateY(0);
    }

    .scroll-to-top:focus-visible {
        outline: 2px solid var(--primary-light);
        outline-offset: 3px;
    }

    .scroll-to-top i {
        font-size: 18px;
        line-height: 1;
    }

    @media (hover: hover) {
        .scroll-to-top:hover {
            background: var(--primary-dark);
        }
    }

    @media (prefers-reduced-motion: reduce) {
        .scroll-to-top {
            transition: none;
            transform: none;
        }
    }
}