@import url("https://cdn.jsdelivr.net/gh/orioncactus/pretendard@v1.3.9/dist/web/static/pretendard.min.css");
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+KR:wght@300;400;500;700;900&display=swap');

/* =========================================
   1. Root Variables & Reset
   ========================================= */
:root {
    --primary-color: #004a99;
    /* Deep Professional Navy */
    --primary-dark: #003366;
    --accent-color: #00a8cc;
    /* High-tech Teal Accent */
    --text-color: #1a1a1a;
    --text-light: #5a5a5a;
    --bg-color: #ffffff;
    --bg-secondary: #f4f7f9;
    --border-color: #dee2e6;
    --transition-speed: 0.3s;
    --font-main: 'Pretendard', 'Noto Sans KR', sans-serif;
    --font-stats: 'Montserrat', sans-serif;
    --h1-size: 3.5rem;
    --h2-size: 2.5rem;
    --h3-size: 1.8rem;
    --p-size: 1.1rem;
}

@media (max-width: 1024px) {
    :root {
        --h1-size: 3rem;
        --h2-size: 2.2rem;
        --h3-size: 1.6rem;
    }
}

@media (max-width: 768px) {
    :root {
        --h1-size: 2.5rem;
        --h2-size: 1.8rem;
        --h3-size: 1.4rem;
        --p-size: 1rem;
    }
}

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

body {
    font-family: 'Noto Sans KR', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #fff;
    overflow-x: hidden;
    font-size: var(--p-size);
    word-break: keep-all;
}

a {
    text-decoration: none;
    color: inherit;
    transition: all var(--transition-speed);
}

ul {
    list-style: none;
}

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

/* =========================================
   2. Typography & Utilities
   ========================================= */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 700;
    line-height: 1.3;
    letter-spacing: -0.02em;
    margin-bottom: 1rem;
}

h1 {
    font-size: var(--h1-size);
    font-weight: 800;
}

h2 {
    font-size: var(--h2-size);
    font-weight: 700;
}

h3 {
    font-size: var(--h3-size);
    font-weight: 700;
}

.section-padding {
    padding: 100px 0;
}

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

.container {
    max-width: 1240px;
    margin: 0 auto;
    padding: 0 24px;
}

.text-center {
    text-align: center;
}

/* Grid System */
.grid {
    display: grid;
    gap: 24px;
}

/* =========================================
   3. Buttons (Pill & Defined)
   ========================================= */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 32px;
    border-radius: 50px;
    /* Pill Shape */
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.15s ease;
    border: 1px solid transparent;
}

/* Primary: Solid */
.btn-primary {
    background-color: var(--text-color);
    /* Black/Dark Grey */
    color: #fff;
    border-color: var(--text-color);
}

.btn-primary:hover {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 74, 153, 0.3);
}

/* Outline: Defined Border */
.btn-outline {
    background-color: transparent;
    color: var(--text-color);
    border-color: #CCCCCC;
    /* Visible subtle border */
}

.btn-outline:hover {
    border-color: var(--primary-color);
    background-color: var(--primary-color);
    color: #fff;
}

/* =========================================
   4. Header & Navigation
   ========================================= */
header {
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    padding: 20px 0;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
}

.nav-container {
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: 40px;
}

.logo {
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--text-color);
    text-transform: uppercase;
    letter-spacing: -0.05em;
}

.nav-links {
    display: flex;
    justify-content: center;
    gap: 48px;
}

.nav-link {
    font-size: 16px;
    font-weight: 600;
    color: #333;
    padding: 8px 0;
    position: relative;
}

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

/* Hover Underline */
.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0%;
    height: 2px;
    background-color: var(--primary-color);
    transition: width 0.3s;
}

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

.mobile-menu-btn {
    display: none;
    margin-left: auto;
    font-size: 1.5rem;
    cursor: pointer;
}

/* Header Action */
.header-action {
    justify-self: end;
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.kakao-header-btn {
    background-color: #FEE500;
    color: #3C1E1E;
    font-size: 14px;
    font-weight: 700;
    padding: 8px 20px;
    border-radius: 100px;
    display: flex;
    align-items: center;
    gap: 6px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
    transition: all 0.2s;
    text-decoration: none;
}

.kakao-header-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12);
}

.header-bg-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: #fff;
    font-size: 6vw;
    /* Relative to viewport width for better scaling */
    font-weight: 950;
    opacity: 0.1;
    white-space: nowrap;
    z-index: 1;
    pointer-events: none;
    letter-spacing: -2px;
}

@media (max-width: 768px) {
    .header-bg-text {
        font-size: 12vw;
        opacity: 0.07;
    }
}

.quick-consult-badge {
    position: absolute;
    top: 110%;
    /* Below the button */
    background: #FF4D4D;
    color: #fff;
    font-size: 11px;
    font-weight: 700;
    padding: 4px 10px;
    border-radius: 12px;
    white-space: nowrap;
    animation: badgeFloat 2s infinite ease-in-out;
    left: 50%;
    transform: translateX(-50%);
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
}

/* Speech Bubble Arrow */
.quick-consult-badge::after {
    content: '';
    position: absolute;
    top: -4px;
    left: 50%;
    transform: translateX(-50%);
    border-left: 4px solid transparent;
    border-right: 4px solid transparent;
    border-bottom: 4px solid #FF4D4D;
}

@keyframes badgeFloat {

    0%,
    100% {
        transform: translate(-50%, 0);
    }

    50% {
        transform: translate(-50%, 3px);
    }
}



/* =========================================
   5. Hero Section
   ========================================= */
.hero {
    height: 100vh;
    min-height: 600px;
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    text-align: center;
}

.hero-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    opacity: 0;
    transition: opacity 1.2s ease-in-out;
    z-index: 1;
}

.hero-slide.active {
    opacity: 1;
}

.hero-slide::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.35);
    /* Darkening overlay */
}

.hero-content {
    position: relative;
    z-index: 2;
    padding: 0 20px;
}

.hero-title {
    font-size: 3.5rem;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
    margin-bottom: 24px;
}

.hero-subtitle {
    font-size: 1.25rem;
    font-weight: 400;
    opacity: 0.9;
    margin-bottom: 40px;
}

.hero-nav {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 3;
    display: flex;
    gap: 12px;
}

.hero-dot {
    width: 60px;
    height: 3px;
    background: rgba(255, 255, 255, 0.4);
    cursor: pointer;
    transition: all 0.3s;
}

.hero-dot.active {
    background: #fff;
    width: 80px;
}

/* =========================================
   6. Stats Section (Defined Borders)
   ========================================= */
.stats-section {
    margin-top: 40px;
    position: relative;
    z-index: 10;
    padding-bottom: 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    background: #fff;
    overflow: hidden;
    /* border-top and border-bottom for a horizontal shelf look if desired, 
       but user said 'internal only' feel. Let's stick to minimal. */
}

.stat-item {
    padding: 40px 20px;
    text-align: center;
    border-right: 1px solid var(--border-color);
}

.stat-item:last-child {
    border-right: none;
}

.stat-num-container {
    font-size: 2.8rem;
    font-weight: 800;
    font-family: var(--font-stats);
    color: var(--text-color);
    margin: 5px 0;
    letter-spacing: -0.02em;
}

.stat-unit {
    font-family: var(--font-main);
    font-size: 1.1rem;
    font-weight: 700;
    margin-left: 2px;
}

.stat-item {
    position: relative;
    padding: 0 20px;
    border-right: 1px solid #eee;
    /* Desktop default */
}

.stat-item:last-child {
    border-right: none;
}

.stat-label-en {
    font-size: 0.85rem;
    color: var(--primary-color);
    font-weight: 700;
    letter-spacing: 2px;
}

/* =========================================
   7. Cards: Products (Overlay Style) & Certs
   ========================================= */
.product-card {
    border-radius: 20px;
    overflow: hidden;
    /* transition: all 0.4s; */
    /* Remove hover lift for this style if desired, or keep */
}

/* Remove border/shadow from base card if we want pure image look, 
   but keeping radius is key. */
.product-card {
    border: none;
    box-shadow: none;
}

.overlay-card {
    position: relative;
    /* height: 540px; */
    aspect-ratio: 3/4;
    width: 100%;
    /* Taller card as shown */
    background-color: #333;
    /* Fallback */
    overflow: hidden;
    border-radius: 20px;
    transition: transform 0.4s ease;
}

.overlay-card .card-overlay h3 {
    font-size: 1.4rem;
    color: #FEE500;
    margin-bottom: 10px;
}

@media (max-width: 768px) {
    .overlay-card .card-overlay h3 {
        font-size: 1.2rem;
    }
}

.product-card:hover .overlay-card {
    transform: scale(1.02);
}

.card-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 60%;
    /* Gradient covers bottom half */
    background: linear-gradient(to top, rgba(0, 0, 0, 0.9), transparent);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 30px;
    z-index: 10;
}

.card-overlay h3 {
    color: #FEE500;
    /* Yellow Title */
    font-size: 1.6rem;
    font-weight: 800;
    margin-bottom: 8px;
    min-height: 2em;
    /* Ensure 2 lines height for alignment */
    display: flex;
    align-items: flex-end;
}

.card-overlay p {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.95rem;
    margin-bottom: 20px;
    line-height: 1.5;
    min-height: 3em;
    /* Ensure 2 lines height for alignment */
}

.btn-text {
    color: #FEE500;
    font-weight: 700;
    font-size: 0.9rem;
    text-decoration: none;
    display: inline-block;
    border-bottom: 1px solid rgba(254, 229, 0, 0.3);
    padding-bottom: 2px;
    transition: all 0.3s;
    width: fit-content;
}

.btn-text:hover {
    border-bottom-color: #FEE500;
    color: #fff;
}

/* Cert Cards */
.cert-item {
    background: #fff;
    border: 1px solid var(--border-color);
    /* VISIBLE BORDER */
    border-radius: 12px;
    padding: 30px 20px;
    /* transition removed for instant out */
    text-align: center;
}

.cert-item:hover {
    transition: all 0.2s;
    /* Smooth IN */
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    border-color: var(--primary-color);
}

.cert-item h3 {
    font-size: 1.2rem;
    margin-top: 16px;
    margin-bottom: 8px;
}

.cert-item p {
    color: var(--text-light);
    font-size: 0.9rem;
}

/* Placeholders */
.img-placeholder {
    width: 100%;
    height: 100%;
    background-color: #F2F2F2;
    color: #CCCCCC;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.3rem;
    letter-spacing: 1px;
    /* Optional inner border for the placeholder area itself as requested */
    border: 1px solid #EEEEEE;
}

/* =========================================
   8. Footer (Dark Compact)
   ========================================= */
footer {
    background: #0a0a0a;
    color: #888;
    padding: 60px 0 40px;
    font-size: 0.85rem;
    margin-top: 100px;
}

footer .container {
    display: flex;
    flex-direction: column;
}

.footer-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 60px;
    margin-bottom: 50px;
}

.footer-logo h3 {
    color: #fff;
    margin-bottom: 20px;
    font-size: 1.4rem;
}

.footer-info p {
    margin-bottom: 8px;
    line-height: 1.6;
}

.footer-links-wrap h4 {
    color: #fff;
    margin-bottom: 20px;
    font-size: 1.1rem;
}

.footer-links {
    list-style: none;
    padding: 0;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.footer-links a {
    color: #888;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: var(--primary-color);
}

.copyright {
    text-align: center;
    color: #444;
    padding-top: 30px;
    border-top: 1px solid #1a1a1a;
}

/* Standardized Grid Layouts */
.product-grid,
.intro-grid,
.product-preview-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.cert-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 40px;
}

.vision-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.awards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
}

/* About Section Specifics */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    margin-bottom: 100px;
}

.about-sub-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    align-items: center;
    margin-top: 80px;
}

@media (max-width: 1024px) {
    .about-grid {
        gap: 40px;
        margin-bottom: 60px;
    }

    .about-sub-grid {
        margin-top: 40px;
    }
}

.about-intro-img {
    height: 450px;
    border-radius: 20px;
    overflow: hidden;
    background-image: url('../images/about_intro.jpg');
    background-size: cover;
    background-position: center;
}

/* Responsive */
@media (max-width: 768px) {
    h1 {
        font-size: 2.5rem;
    }

    .nav-container {
        grid-template-columns: 1fr auto;
    }

    header {
        padding: 10px 0 !important;
    }

    .logo {
        font-size: 1.2rem;
    }

    nav,
    .header-action {
        display: none;
    }

    .mobile-menu-btn {
        display: block;
        font-size: 1.3rem;
    }

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

    .stat-item {
        border-right: 1px solid #eee;
        border-bottom: 1px solid #eee;
        padding: 20px 0;
    }

    /* Remove right border for 2nd and 4th item (right column) */
    .stat-item:nth-child(2n) {
        border-right: none;
    }

    /* Remove bottom border for 3rd and 4th item (bottom row) */
    .stat-item:nth-child(n+3) {
        border-bottom: none;
    }

    footer .container {
        align-items: center;
        text-align: center;
        gap: 30px;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .footer-links {
        justify-content: center;
    }

    .copyright {
        text-align: center;
        width: 100%;
    }

    /* About Section Mobile */
    .about-grid,
    .about-sub-grid {
        grid-template-columns: 1fr !important;
        gap: 40px !important;
    }

    .about-sub-grid .img-placeholder {
        height: 300px !important;
        /* Reduce height for mobile */
    }

    .about-intro-img {
        height: 300px !important;
        /* Reduce height for mobile */
    }
}

/* Page Header (Subpages) */
.page-header {
    height: 450px;
    background-color: var(--primary-dark);
    /* Fallback */
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: #fff;
    position: relative;
    padding-top: 80px;
    /* Offset for fixed header to push content down */
    box-sizing: border-box;
}

@media (max-width: 768px) {
    .page-header {
        height: 300px;
        padding-top: 60px;
    }
}

.page-header h1 {
    font-size: var(--h1-size);
    margin-bottom: 10px;
}

.page-header p {
    font-size: var(--p-size);
    opacity: 0.9;
}

/* Subpage Content */
.sub-content {
    padding: 100px 0;
}

/* Animations */
.reveal-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal-up.active {
    opacity: 1;
    transform: translateY(0);
    transition: all 0.2s ease, opacity 0.8s ease, transform 0.8s ease;
}

.reveal-left {
    opacity: 0;
    transform: translateX(-30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal-left.active {
    opacity: 1;
    transform: translateX(0);
    transition: all 0.2s ease, opacity 0.8s ease, transform 0.8s ease;
}

.reveal-right {
    opacity: 0;
    transform: translateX(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal-right.active {
    opacity: 1;
    transform: translateX(0);
    transition: all 0.2s ease, opacity 0.8s ease, transform 0.8s ease;
}

.delay-100 {
    transition-delay: 0.1s;
}

.delay-200 {
    transition-delay: 0.2s;
}

.delay-300 {
    transition-delay: 0.3s;
}

/* =========================================
   About Page Interactive Styles
   ========================================= */

/* Parallax Background */
.parallax-bg {
    background-attachment: fixed;
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
}

/* Hover Lift Utility */
.hover-lift {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.hover-lift:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
}

/* Timeline Section */
.history-section {
    position: relative;
    padding: 100px 0;
    overflow: hidden;
    background-color: #f9f9f9;
}

.timeline {
    position: relative;
    max-width: 1000px;
    margin: 0 auto;
}

/* Vertical Line */
.timeline::after {
    content: '';
    position: absolute;
    width: 2px;
    background-color: #ddd;
    top: 0;
    bottom: 0;
    left: 50%;
    margin-left: -1px;
}

.timeline-item {
    padding: 10px 40px;
    position: relative;
    background-color: inherit;
    width: 50%;
    box-sizing: border-box;
    opacity: 0;
    /* Hidden for animation */
    transform: translateY(20px);
    transition: all 0.6s ease;
}

.timeline-item.active {
    opacity: 1;
    transform: translateY(0);
}

/* Circle on line */
.timeline-item::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    right: -10px;
    background-color: #fff;
    border: 4px solid var(--primary-color);
    top: 24px;
    border-radius: 50%;
    z-index: 1;
    transition: all 0.3s ease;
}

.timeline-item:hover::after {
    background-color: var(--primary-color);
    transform: scale(1.2);
}

.left {
    left: 0;
}

.right {
    left: 50%;
}

.right::after {
    left: -10px;
}

/* Content Box */
.timeline-content {
    padding: 25px 30px;
    background-color: #fff;
    position: relative;
    border-radius: 15px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease;
}

.timeline-content:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.timeline-year {
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--primary-color);
    margin-bottom: 5px;
    display: block;
    font-family: 'Noto Sans KR', sans-serif;
}

.timeline-title {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 10px;
    color: #333;
}

/* Timeline Mobile Responsive */
@media screen and (max-width: 768px) {
    .timeline::after {
        left: 31px;
    }

    .timeline-item {
        width: 100%;
        padding-left: 70px;
        padding-right: 25px;
    }

    .timeline-item::after {
        left: 21px;
    }

    .right {
        left: 0%;
    }

    .timeline::after {
        left: 31px;
    }

    .timeline-indicator {
        left: 31px !important;
    }
}

/* Scroll Indicator Styling (The Moving Circle) */
.timeline-indicator {
    position: absolute;
    top: 0;
    left: 50%;
    width: 24px;
    height: 24px;
    background-color: #fff;
    border: 5px solid var(--primary-color);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    z-index: 10;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.2);
    /* Transition removed for smooth JS/rAF movement */
}

/* Timeline Item - Remove static dots */
.timeline-item::after {
    display: none;
    /* Hide static dots */
}

/* Content Reveal Logic */
.timeline-item {
    padding: 10px 40px;
    position: relative;
    background-color: inherit;
    width: 50%;
    box-sizing: border-box;
    opacity: 0.2;
    /* Dimmed initially */
    transform: translateY(0);
    /* Reset transform */
    transition: opacity 0.5s ease, transform 0.5s ease;
    filter: blur(2px);
}

.timeline-item.active {
    opacity: 1;
    filter: blur(0);
    transform: scale(1.02);
}

@media (max-width: 1024px) {
    .timeline::after {
        left: 31px;
    }

    .timeline-item {
        width: 100%;
        padding-left: 70px;
        padding-right: 25px;
    }

    .timeline-item::after {
        left: 21px;
    }

    .right {
        left: 0%;
    }

    .timeline-indicator {
        left: 31px !important;
    }
}

/* Mobile Menu Overlay Styles */
.mobile-menu-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background-color: #fff;
    z-index: 2000;
    transform: translateX(100%);
    transition: transform 0.3s ease-in-out;
    display: flex;
    justify-content: center;
    align-items: center;
}

.mobile-menu-overlay.active {
    transform: translateX(0);
}

.mobile-menu-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 30px;
    width: 100%;
    padding: 20px;
}

.mobile-menu-close {
    position: absolute;
    top: 25px;
    right: 25px;
    font-size: 1.8rem;
    cursor: pointer;
    color: #333;
}

.mobile-menu-link {
    font-size: 1.5rem;
    font-weight: 700;
    color: #333;
    text-decoration: none;
    transition: color 0.2s;
}

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

.mobile-menu-btn-action {
    background-color: #FEE500;
    color: #3C1E1E;
    font-size: 1.2rem;
    font-weight: 700;
    padding: 12px 30px;
    border-radius: 50px;
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 20px;
    text-decoration: none;
}