/* page_pro06.css - North Star Battery (NorthStar) Styles */

/* --- Variables & Reset for Isolation --- */
:root {
    --ns-primary: #0093D8;
    --ns-dark: #1a1a1a;
    --ns-light: #ffffff;
    --ns-gray: #f5f5f5;
    --ns-transition: all 0.4s cubic-bezier(0.25, 1, 0.5, 1);
}

.page_pro06_container {
    font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
    color: var(--ns-dark);
    overflow-x: hidden;
    background-color: #fff;
}

.page_pro06_container * {
    box-sizing: border-box;
}

/* --- Common Utilities --- */
.ns-section {
    padding: 100px 0;
    position: relative;
    width: 100%;
}

.ns-container {
    max-width: 1480px;
    margin: 0 auto;
    padding: 0 15px;
}

.ns-title-center {
    text-align: center;
    margin-bottom: 60px;
}

.ns-title-center h2 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 20px;
    letter-spacing: 2px;
}

.ns-title-center p {
    font-size: 1.2rem;
    color: #666;
    max-width: 800px;
    margin: 0 auto;
}

.ns-btn {
    display: inline-block;
    padding: 12px 30px;
    background: transparent;
    border: 1px solid var(--ns-dark);
    color: var(--ns-dark);
    text-decoration: none;
    font-size: 1rem;
    transition: var(--ns-transition);
    margin-top: 20px;
    border-radius: 50px;
}

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

/* --- Banner Section --- */
.ns-banner {
    height: 100vh;
    background-color: #000;
    /* Placeholder for Video/Img */
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.ns-banner-bg-placeholder {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: #0093D8;
    /* Fallback */
    background: linear-gradient(135deg, #0d0d0d 0%, #002f4b 100%);
    z-index: 1;
}

.ns-banner-content {
    position: relative;
    z-index: 2;
    transform: translateY(30px);
    opacity: 0;
    /* GSAP will animate this */
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.6);
    /* Added shadow for readability */
}

.ns-banner h1 {
    font-size: 8rem;
    margin-bottom: 20px;
    font-weight: 800;
    letter-spacing: 5px;
}

.ns-banner p {
    font-size: 4rem;
    opacity: 0.9;
    font-weight: 300;
}

/* --- Intro Section (Scroll Text Color Reveal) --- */
.ns-intro {
    background: #fff;
    height: auto;
    min-height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 15vh 0;
}

.ns-intro-text {
    font-size: 2.5rem;
    /* Larger for impact */
    line-height: 1.6;
    font-weight: 700;
    max-width: 1000px;
    margin: 0 auto;
}

.ns-intro-text span {
    background: linear-gradient(to right, #0093D8 50%, #e0e0e0 50%);
    background-size: 200% 100%;
    background-position: 100% 0;
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    transition: none;
    /* GSAP handles this */
    display: inline;
    padding: 2px 0;
}

.ns-intro-text span.highlight {
    font-size: 3rem;
    display: block;
    margin-top: 20px;
}

/* --- Placeholders (Red Wireframe) --- */
.img-placeholder {
    width: 100%;
    height: 100%;
    background: rgba(255, 0, 0, 0.05);
    /* Slight tint */
    border: 2px solid red;
    /* Wired frame */
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.img-placeholder::after {
    content: "IMAGE PLACEHOLDER";
    color: red;
    font-weight: bold;
    font-size: 1.2rem;
    opacity: 0.5;
}

/* Helper for Series Img */
.ns-series-img.img-placeholder {
    height: 300px;
}


/* --- GT-Force Section (Interactive Cards) --- */
.ns-gtforce {
    background: #0f1012;
    color: #fff;
    padding: 120px 0;
}

.ns-gtforce .ns-title-center h2 {
    color: #fff;
}

.ns-gtforce .ns-title-center p {
    color: #aaa;
}

.ns-gtforce .ns-btn {
    border-color: #fff;
    color: #fff;
}

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

.ns-card-grid {
    display: flex;
    justify-content: space-between;
    gap: 30px;
    margin-top: 80px;
}

.ns-card {
    flex: 1;
    height: 400px;
    background: #1f1f1f;
    position: relative;
    overflow: hidden;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--ns-transition);
}

.ns-card-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: #333;
    /* Placeholder */
    transition: transform 0.6s ease;
    z-index: 1;
}

.ns-card:hover .ns-card-bg {
    transform: scale(1.05);
}

.ns-card-content {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: 40px;
    z-index: 2;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.9), transparent);
}

.ns-card h3 {
    font-size: 2rem;
    margin-bottom: 0;
    /* Transition removed to allow GSAP control */
}

.ns-card-detail {
    height: 0;
    overflow: hidden;
    opacity: 0;
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    margin-top: 0;
    /* Transition removed */
}

/* Remove CSS hover effects (handled by GSAP now) */
/* .ns-card:hover h3 {
    margin-bottom: 15px;
    color: var(--ns-primary);
}

.ns-card:hover .ns-card-detail {
    height: auto;
    opacity: 1;
    margin-top: 15px;
    padding-top: 15px;
} */

.ns-card-detail p {
    font-size: 1rem;
    color: #ddd;
    margin-bottom: 8px;
    line-height: 1.4;
}


/* --- Features Section (Staggered Layout) --- */
.ns-features {
    background: #fdfdfd;
}

.ns-feat-item {
    display: flex;
    align-items: center;
    margin-bottom: 150px;
    opacity: 0;
    /* GSAP */
    transform: translateY(50px);
}

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

.ns-feat-item.reverse {
    flex-direction: row-reverse;
}

.ns-feat-text {
    flex: 1;
    padding: 0 50px;
}

.ns-feat-text h3 {
    font-size: 2.2rem;
    margin-bottom: 20px;
    font-weight: 700;
}

.ns-feat-text p {
    font-size: 1.1rem;
    color: #666;
    line-height: 1.8;
}

.ns-feat-img {
    flex: 1.2;
    height: 320px;
    background: #e0e0e0;
    /* Placeholder */
    border-radius: 12px;
    position: relative;
    overflow: hidden;
}

.ns-feat-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

/* Specific styling for the first feature with 2 images */
.ns-feat-img.split-img {
    display: flex;
    gap: 20px;
}

.ns-feat-img.split-img div {
    flex: 1;
    background: #ccc;
    height: 100%;
    background-size: cover;
    background-position: center;
}


/* --- Products Series --- */
.ns-series {
    background-color: #fff;
    text-align: center;
}

.ns-series-grid {
    display: flex;
    justify-content: center;
    gap: 40px;
    margin-top: 50px;
}

.ns-series-item {
    text-align: center;
    width: 300px;
    transition: transform 0.3s;
}

.ns-series-item:hover {
    transform: translateY(-10px);
}

.ns-series-img {
    width: 100%;
    height: 300px;
    background: #f0f0f0;
    margin-bottom: 20px;
    border-radius: 8px;
    object-fit: contain;
    /* Ensure the whole battery is visible */
    background-color: transparent;
    /* No background needed if transparent PNG or full fill */
}

.ns-series-item h4 {
    font-size: 1.5rem;
    font-weight: bold;
}

/* --- Responsive Adjustments --- */
@media (max-width: 900px) {
    .ns-card-grid {
        flex-direction: column;
    }

    .ns-feat-item,
    .ns-feat-item.reverse {
        flex-direction: column-reverse;
        text-align: center;
        margin-bottom: 80px;
    }

    .ns-feat-text {
        padding: 30px 0 0 0;
    }

    .ns-feat-img {
        width: 100%;
        height: 300px;
    }

    .ns-series-grid {
        flex-direction: column;
        align-items: center;
    }

    .ns-banner h1 {
        font-size: 2.5rem;
    }
}

/* --- Parallax Features (Items 2-5) --- */
.ns-parallax-item {
    position: relative;
    width: 100%;
    height: 60vh;
    /* Rectangular aspect, tall enough for parallax */
    min-height: 500px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 50px;
    color: #fff;
    text-align: center;
}

.ns-parallax-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    /* Reset to 100% for use with backgroundPosition parallax */
    background-size: cover;
    background-position: center;
    z-index: 1;
    background-color: #333;
}

.ns-parallax-content {
    position: relative;
    z-index: 2;
    background: rgba(0, 0, 0, 0.4);
    /* Contrast overlay */
    padding: 30px 50px;
    border-radius: 8px;
    backdrop-filter: blur(5px);
}

.ns-parallax-content h3 {
    font-size: 2.5rem;
    margin-bottom: 15px;
    font-weight: 700;
}

.ns-parallax-content p {
    font-size: 1.2rem;
    font-weight: 300;
}