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

:root {
    --primary-text: #1d1d1f;
    --secondary-text: #86868b;
    --accent-color: #781a21; /* Main theme color */
    --background-light: #f5f5f7;
    --background-white: #ffffff;
    --border-light: #d2d2d7;
    --shadow-light: rgba(0, 0, 0, 0.04);
    --shadow-medium: rgba(0, 0, 0, 0.08);
    --shadow-strong: rgba(0, 0, 0, 0.12);
    --dark-background: linear-gradient(135deg, #000000 0%, #1a1a1a 100%);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', Roboto, sans-serif;
    font-size: 17px;
    line-height: 1.5;
    color: var(--primary-text);
    background: var(--background-white);
    overflow-x: hidden;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(3, 3, 3, 0.8);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px) ;
    z-index: 1000;
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    transition: all 0.3s cubic-bezier(0.25, 0.1, 0.25, 1);
}

.nav-container {
    max-width: 1440px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 32px;
    height: 80px;
}

.logo {
    font-size: 21px;
    font-weight: 600;
    color: white;
    letter-spacing: -0.02em;
    z-index: 5001;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 24px;
}

.nav-links a {
    text-decoration: none;
    color: white;
    font-size: 15px;
    font-weight: 400;
    transition: opacity 0.3s ease;
    opacity: 0.8;
    white-space: nowrap;
}

.nav-links a:hover {
    opacity: 1;
}

.nav-cta-btn {
    background-color: white;
    color: black;
    padding: 8px 18px;
    border-radius: 20px;
    text-decoration: none;
    font-size: 15px;
    font-weight: 500;
    transition: all 0.3s ease;
}

.nav-cta-btn:hover {
    background-color: #fff;
    transform: scale(1.05);
}

.hamburger-menu {
    display: none;
    flex-direction: column;
    justify-content: space-around;
    width: 24px;
    height: 24px;
    cursor: pointer;
    z-index: 5001;
}
.hamburger-menu span {
    width: 100%;
    height: 2px;
    background-color:white;
    border-radius: 2px;
    transition: all 0.3s ease-in-out;
}
.hamburger-menu.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}
.hamburger-menu.active span:nth-child(2) {
    opacity: 0;
}
.hamburger-menu.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

.mobile-nav-panel {
    position: fixed;
    top: 0;
    left: -100%;
    width: 80%;
    max-width: 300px;
    height: 100vh;
    background: black;
    z-index: 5000;
    transition: left 0.4s ease-in-out;
    padding: 80px 30px;
    box-shadow: 0 0 20px rgba(0,0,0,0.1);
}
.mobile-nav-panel.active {
    left: 0;
}
.mobile-nav-panel ul {
    list-style: none;
}
.mobile-nav-panel li {
    margin-bottom: 24px;
}
.mobile-nav-panel a {
    text-decoration: none;
    color: white;
    font-size: 20px;
    font-weight: 600;
}
.mobile-nav-panel .nav-cta-btn {
    color: black;
    width: 100%;
    text-align: center;
    display: inline-block;
}
.mobile-nav-panel .nav-cta-btn:hover {
    color: black;
}

#nav-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.4);
    z-index: 4999;
}
#nav-overlay.active {
    display: block;
}


/* Hero Section */
.hero {
    padding-top: 120px;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    background-color: #000000;
}

#hero-video {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    min-width: 100%;
    min-height: 100%;
    width: auto;
    height: auto;
    z-index: 1;
}

.hero::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    z-index: 1;
}

.hero-content {
    text-align: center;
    max-width: 1100px;
    padding: 0 32px;
    z-index: 2;
    color: white;
}

.hero h1 {
    font-size: clamp(56px, 8vw, 96px);
    font-weight: 700;
    letter-spacing: -0.04em;
    margin-bottom: 24px;
    background: linear-gradient(135deg, #ffffff 60%, #e0e0e0 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 32px;
    font-weight: 600;
    color: white;
    margin-bottom: 20px;
    letter-spacing: -0.02em;
}

.hero-description {
    font-size: 24px;
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 48px;
    line-height: 1.4;
    font-weight: 400;
}

.cta-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn-primary {
    background: var(--accent-color);
    color: white;
    border: 2px solid transparent;
    padding: 14px 30px;
    border-radius: 24px;
    font-size: 18px;
    font-weight: 500;
    text-decoration: none;
    display: inline-block;
    transition: all 0.3s cubic-bezier(0.25, 0.1, 0.25, 1);
    cursor: pointer;
}

.btn-primary:hover {
    background: #5f151a; /* Darker red */
    transform: translateY(-2px);
    box-shadow: 0 12px 32px rgba(120, 26, 33, 0.4);
}

.btn-secondary {
    background: transparent;
    color: var(--accent-color);
    border: 2px solid var(--accent-color);
    padding: 14px 30px;
    border-radius: 24px;
    font-size: 18px;
    font-weight: 500;
    text-decoration: none;
    display: inline-block;
    transition: all 0.3s cubic-bezier(0.25, 0.1, 0.25, 1);
    cursor: pointer;
}

.hero .btn-secondary {
    color: white;
    border-color: white;
}

.btn-secondary:hover {
    background: var(--accent-color);
    color: white;
    transform: translateY(-2px);
    border-color: var(--accent-color);
}

.hero .btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: white;
    color: white;
}

.btn-solid-white {
    background: white;
    color: var(--primary-text);
    border: 2px solid white;
    padding: 14px 30px;
    border-radius: 24px;
    font-size: 18px;
    font-weight: 500;
    text-decoration: none;
    display: inline-block;
    transition: all 0.3s cubic-bezier(0.25, 0.1, 0.25, 1);
    cursor: pointer;
}
.btn-solid-white:hover {
    background: #f5f5f7;
    border-color: #f5f5f7;
    transform: translateY(-2px);
}

.btn-dark {
    background: var(--primary-text);
    color: white;
    border: 2px solid var(--primary-text);
    padding: 14px 30px;
    border-radius: 24px;
    font-size: 18px;
    font-weight: 500;
    text-decoration: none;
    display: inline-block;
    transition: all 0.3s cubic-bezier(0.25, 0.1, 0.25, 1);
    cursor: pointer;
}
.btn-dark:hover {
    background: #000;
    border-color: #000;
    transform: translateY(-2px);
}

/* Section Styles */
.section {
    padding: 120px 0;
}

.section-white {
    background: var(--background-white);
}

.section-light {
    background: var(--background-light);
}

.section-dark {
    background: var(--dark-background);
    color: white;
}

.section-dark .section-title {
    color: white;
}

.section-dark .section-subtitle {
    color: rgba(255, 255, 255, 0.8);
}

.section-dark .advantage-card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.section-dark .advantage-title {
    color: white;
}

.section-dark .advantage-description {
    color: rgba(255, 255, 255, 0.8);
}

.section-dark .advantage-icon {
    border: 2px solid rgba(255, 255, 255, 0.2);
}

.container {
    max-width: 1440px;
    margin: 0 auto;
    padding: 0 32px;
}

.section-header {
    text-align: center;
    margin-bottom: 100px;
}

.section-title {
    font-size: clamp(40px, 6vw, 64px);
    font-weight: 700;
    letter-spacing: -0.03em;
    margin-bottom: 20px;
    color: var(--primary-text);
}

.section-subtitle {
    font-size: 24px;
    color: var(--secondary-text);
    font-weight: 400;
    line-height: 1.4;
}

/* Advantages Section */
.advantages-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
}

.advantage-card {
    background: var(--background-white);
    border-radius: 24px;
    padding: 48px 40px;
    text-align: center;
    box-shadow: 0 8px 32px var(--shadow-light);
    border: 1px solid var(--border-light);
    transition: all 0.4s cubic-bezier(0.25, 0.1, 0.25, 1);
    position: relative;
    overflow: hidden;
}

.advantage-card:hover {
    transform: translateY(-8px);
    background: rgba(255, 255, 255, 0.08);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.advantage-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 24px;
    background: transparent;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}
.advantage-icon svg {
    width: 44px;
    height: 44px;
}

.advantage-title {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 16px;
    letter-spacing: -0.01em;
}

.advantage-description {
    color: var(--secondary-text);
    font-size: 16px;
    line-height: 1.5;
}

/* Image Text Sections */
.image-text-section {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 100px;
    align-items: center;
    margin-bottom: 160px;
}

.image-text-section:last-child {
    margin-bottom: 0;
}

.image-text-section.reverse {
    direction: rtl;
}

.image-text-section.reverse > * {
    direction: ltr;
}

.image-content {
    height: 500px;
    background: linear-gradient(135deg, #f0f2f5 0%, #e8e8ed 100%);
    border-radius: 24px;
    position: relative;
    overflow: hidden;
    transition: all 0.4s ease;
    box-shadow: 0 16px 64px var(--shadow-light);
}

.image-content:hover {
    transform: scale(1.02);
}

/* New styles for placeholder images */
.image-content img,
.industry-image img,
.scenario-image img,
.strength-image img,
.faq-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}


.text-content h3 {
    font-size: 40px;
    font-weight: 700;
    margin-bottom: 24px;
    letter-spacing: -0.02em;
}

.text-content p {
    font-size: 20px;
    color: var(--secondary-text);
    line-height: 1.6;
    margin-bottom: 32px;
}

/* Product Section - Premium Design */
.product-hero {
    background: var(--dark-background);
    color: white;
    padding: 120px 0;
    position: relative;
    overflow: hidden;
}

.product-hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="100" height="100" viewBox="0 0 100 100" xmlns="http://www.w3.org/2000/svg"><g fill="none" fill-rule="evenodd"><g fill="%23ffffff" fill-opacity="0.03"><circle cx="50" cy="50" r="2"/></g></g></svg>') repeat;
}

.product-content {
    position: relative;
    z-index: 2;
    max-width: 1440px;
    margin: 0 auto;
    padding: 0 32px;
}

.product-header {
    text-align: center;
    margin-bottom: 80px;
}

.product-header h2 {
    font-size: 56px;
    font-weight: 700;
    margin-bottom: 20px;
    letter-spacing: -0.03em;
}

.product-header p {
    font-size: 24px;
    opacity: 0.8;
    font-weight: 300;
}

.product-showcase {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.product-image-scroller {
    display: none;
}

.product-image-hero {
    height: 600px;
    border-radius: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    box-shadow: 0 20px 80px rgba(0, 0, 0, 0.3);
}

#main-product-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: opacity 0.3s ease;
    cursor: zoom-in;
}
.product-thumbnails {
    display: flex;
    gap: 16px;
    margin-top: 24px;
    justify-content: center;
}
.thumbnail-img {
    width: 80px;
    height: 80px;
    object-fit: cover;
    border-radius: 12px;
    cursor: pointer;
    border: 2px solid transparent;
    opacity: 0.6;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}
.thumbnail-img:hover {
    opacity: 1;
}

.thumbnail-img.active {
    opacity: 1;
    transform: scale(1.05);
    border-color: transparent;
}
.thumbnail-img.active::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 12px;
    padding: 2px;
    background: linear-gradient(45deg, rgba(255,255,255,0.4), rgba(255,255,255,1));
    -webkit-mask:
          linear-gradient(#fff 0 0) content-box,
          linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
}

.product-info {
    padding: 40px;
}

.product-name {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 16px;
    background: linear-gradient(135deg, #ffffff, #86868b);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.product-tagline {
    font-size: 24px;
    margin-bottom: 32px;
    opacity: 0.8;
    font-weight: 300;
}

.product-price {
    display: flex;
    align-items: baseline;
    gap: 16px;
    margin-bottom: 40px;
}
.original-price {
    font-size: 24px;
    font-weight: 400;
    text-decoration: line-through;
    color: rgba(255, 255, 255, 0.6);
}
.current-price {
    font-size: 36px;
    font-weight: 700;
    color: #e60000;
}

.product-info .cta-buttons {
    justify-content: flex-start;
}

.product-hero .btn-secondary {
    color: white;
    border-color: rgba(255, 255, 255, 0.8);
}
.product-hero .btn-secondary:hover {
    background: white;
    color: var(--primary-text);
    border-color: white;
}

.product-advantages {
    margin: 100px 0;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
}

.advantage-box {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    padding: 32px;
    text-align: center;
    transition: all 0.3s ease;
}

.advantage-box:hover {
    transform: translateY(-8px);
    background: rgba(255, 255, 255, 0.1);
    box-shadow: 0 16px 50px rgba(0,0,0,0.3);
}

.advantage-box-icon {
    font-size: 32px;
    margin-bottom: 20px;
}

.advantage-box-title {
    font-size: 18px;
    font-weight: 600;
    color: white;
    margin-bottom: 12px;
}

.advantage-box-text {
    font-size: 15px;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.5;
}

.specs-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
    margin-top: 60px;
}

.spec-category {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 16px;
    padding: 32px;
    backdrop-filter: blur(20px);
}

.spec-category h4 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 20px;
    color: white;
}

.spec-item {
    display: flex;
    justify-content: space-between;
    padding: 12px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.spec-item:last-child {
    border-bottom: none;
}

.spec-label {
    opacity: 0.7;
    font-size: 16px;
}

.spec-value {
    font-weight: 600;
    font-size: 16px;
    text-align: right;
}

.scroll-indicator {
    display: none;
    text-align: center;
    color: rgba(255, 255, 255, 0.7);
    margin-top: 16px;
    font-size: 14px;
    animation: pulse 2.5s infinite;
    transition: opacity 0.5s ease;
}
.scroll-indicator.hidden {
    opacity: 0;
}

@keyframes pulse {
    0%, 100% { opacity: 0.8; }
    50% { opacity: 0.4; }
}

/* --- NEW: Attachments Carousel --- */
.attachments-section {
    margin-top: 100px;
}
.attachments-carousel-container {
    position: relative;
    overflow: hidden;
    padding: 10px 0; /* Prevents box-shadow cutoff */
    margin: -10px 0;
}
.attachments-carousel-wrapper {
    display: flex;
    transition: transform 0.5s ease-in-out;
}
.attachment-card {
    flex: 0 0 280px; /* Card width */
    margin-right: 24px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    overflow: hidden;
    transition: all 0.3s ease;
    cursor: pointer;
}
.attachment-card:hover {
    transform: translateY(-8px);
    background: rgba(255, 255, 255, 0.1);
    box-shadow: 0 16px 50px rgba(0,0,0,0.3);
}
.attachment-image {
    width: 100%;
    aspect-ratio: 1 / 1;
    background: #3c3c3e;
    display: flex;
    align-items: center;
    justify-content: center;
}
.attachment-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.attachment-info {
    padding: 20px;
}
.attachment-title {
    font-size: 16px;
    font-weight: 600;
    color: white;
    margin-bottom: 8px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.attachment-price {
    font-size: 15px;
    color: rgba(255, 255, 255, 0.7);
}
.attachments-section .carousel-controls {
    justify-content: flex-end;
    margin-top: 32px;
}
.attachments-section .carousel-btn {
    background: rgba(30, 30, 30, 0.9);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: white;
}
.attachments-section .carousel-btn:hover {
    background: white;
    color: var(--primary-text);
}

/* Industry Applications - Large Cards */
.industry-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
}

/* --- Style for new clickable links --- */
.industry-link {
    text-decoration: none;
    color: inherit;
    display: block; /* Ensures the link takes up the full grid space */
}

.industry-card {
    background: var(--background-white);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 8px 32px var(--shadow-light);
    border: 1px solid var(--border-light);
    transition: all 0.4s cubic-bezier(0.25, 0.1, 0.25, 1);
    cursor: pointer;
    position: relative;
    height: 100%; /* Ensures all cards in a row have the same height */
}

.industry-link:hover .industry-card { /* Apply hover effect via the link */
    transform: translateY(-8px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.industry-card-text-only:hover {
    background: #fdfdfd;
}

.industry-image {
    height: 300px;
    background: linear-gradient(135deg, #f0f2f5 0%, #e8e8ed 100%);
}

.industry-content {
    padding: 24px;
}

.industry-title {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--primary-text);
}

.industry-description {
    color: var(--secondary-text);
    font-size: 15px;
    line-height: 1.5;
}

.industry-card-text-only {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 40px;
}
.industry-card-text-only .industry-content {
    padding: 0;
}

/* Comparison Section */
.comparison-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 80px;
    align-items: center;
}

.comparison-carousel {
    position: relative;
}

.carousel-image-wrapper {
    position: relative;
    border-radius: 24px;
    overflow: hidden;
    box-shadow: 0 20px 80px rgba(0, 0, 0, 0.3);
}

.comparison-slide {
    display: none;
    gap: 8px;
    animation: fadeIn 0.6s;
}

.comparison-slide.active {
    display: flex;
}

.comparison-image-container {
    flex: 1;
    position: relative;
}

.comparison-image-container img {
    display: block;
    width: 100%;
    height: auto;
}

.comparison-image-label {
    position: absolute;
    bottom: 16px;
    left: 16px;
    background: rgba(0,0,0,0.6);
    color: white;
    padding: 6px 12px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
}

.comparison-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 24px;
}

.comparison-nav-btn {
    background: rgba(255,255,255,0.1);
    border: 1px solid rgba(255,255,255,0.2);
    width: 48px;
    height: 48px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    transition: all 0.3s ease;
}
.comparison-nav-btn:hover {
    background: rgba(255,255,255,0.2);
}

.comparison-counter {
    font-size: 18px;
    font-weight: 500;
    color: rgba(255,255,255,0.8);
}

.comparison-text .text-block {
    display: none;
    animation: fadeIn 0.6s;
}

.comparison-text .text-block.active {
    display: block;
}

.comparison-text h3 {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 20px;
    color: white;
}

.comparison-text p {
    font-size: 18px;
    line-height: 1.7;
    color: rgba(255,255,255,0.7);
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Application Scenarios - Manual Carousel */
.scenarios-section {
    position: relative;
}

.carousel-container {
    position: relative;
    overflow: hidden;
    border-radius: 24px;
    padding-top: 10px;
    margin-top: -10px;
    padding-bottom: 10px;
    margin-bottom: -10px;
}

.carousel-wrapper {
    display: flex;
    transition: transform 0.5s ease-in-out;
}

.carousel-slide {
    min-width: 400px;
    margin-right: 32px;
    background: var(--background-white);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 12px 48px var(--shadow-light);
    border: 1px solid var(--border-light);
    transition: all 0.3s ease;
}

.carousel-slide:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 80px var(--shadow-medium);
}

.scenario-image {
    height: 350px;
    background: linear-gradient(135deg, #f0f2f5 0%, #e8e8ed 100%);
}

.scenario-content {
    padding: 32px;
}

.scenario-title {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 12px;
}

.scenario-description {
    color: var(--secondary-text);
    font-size: 16px;
    line-height: 1.6;
}

.carousel-controls {
    position: relative;
    display: flex;
    justify-content: flex-end;
    gap: 20px;
    margin-top: 20px;
    z-index: 10;
}

.carousel-btn {
    width: 56px;
    height: 56px;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 8px 32px var(--shadow-light);
    color: var(--primary-text);
}

.carousel-btn:hover {
    background: var(--primary-text);
    color: white;
    transform: scale(1.1);
}

.carousel-btn svg {
    width: 24px;
    height: 24px;
}

/* Why Choose Us - Three Part Layout */
.choose-us-section {
    background: var(--dark-background);
    color: white;
    position: relative;
    overflow: hidden;
    padding: 120px 0;
}

.choose-us-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="80" height="80" viewBox="0 0 80" xmlns="http://www.w3.org/2000/svg"><g fill="none" fill-rule="evenodd"><g fill="%23ffffff" fill-opacity="0.02"><circle cx="40" cy="40" r="2"/></g></g></svg>') repeat;
}

.choose-content {
    position: relative;
    z-index: 2;
}

.choose-text-section {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    margin-bottom: 120px;
}

.choose-text h3 {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 24px;
    letter-spacing: -0.02em;
}

.choose-text p {
    font-size: 20px;
    line-height: 1.6;
    opacity: 0.8;
    margin-bottom: 24px;
}

.company-strength {
    margin-bottom: 120px;
}

.strength-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.strength-card {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    overflow: hidden;
    transition: all 0.4s cubic-bezier(0.25, 0.1, 0.25, 1);
    cursor: pointer;
}

.strength-card:hover {
    transform: translateY(-8px);
    background: rgba(255, 255, 255, 0.08);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.strength-image {
    background: linear-gradient(135deg, #2c2c2e 0%, #48484a 100%);
    aspect-ratio: 1 / 1;
    width: 100%;
}

.strength-content {
    padding: 24px;
}

.strength-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
    color: white;
}

.strength-description {
    color: rgba(255, 255, 255, 0.7);
    font-size: 14px;
    line-height: 1.4;
}

/* ===== MODIFIED: Vertical Comparison Section Styles ===== */
.vertical-comparison-wrapper {
    margin: 0; /* Reset margin as it is now controlled by the parent section */
}
#model-comparison .section-header .section-title,
#model-comparison .product-header-v h3,
#model-comparison .feature-block-v h4,
#model-comparison .feature-block-v svg {
    color: var(--primary-text); /* Change all text and SVGs to black */
}
#model-comparison .product-header-v .price,
#model-comparison .feature-block-v p {
    color: var(--secondary-text); /* Ensure paragraphs are grey */
}

.vertical-comparison-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    align-items: stretch;
}

.product-header-v, .feature-block-v {
    grid-column: span 1;
}

.product-header-v {
    text-align: center;
    padding: 30px 15px;
}
.product-header-v img {
    max-height: 160px;
    max-width: 160px;
    aspect-ratio: 1 / 1;
    object-fit: cover;
    margin-bottom: 24px;
    background: #fff;
    border-radius: 16px;
    border: 1px solid var(--border-light);
}
.product-header-v h3 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 8px;
}
.product-header-v .price {
    font-size: 18px;
    margin-bottom: 24px;
}

.feature-block-v {
    text-align: center;
    padding: 30px 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
}

.feature-block-v svg {
    width: 32px;
    height: 32px;
    margin-bottom: 16px;
}
.feature-block-v h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 8px;
}
.feature-block-v p {
    font-size: 15px;
    line-height: 1.4;
}

/* Part 3: FAQs */
.faqs-section {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: start;
}

.faqs-content h3 {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 40px;
    letter-spacing: -0.02em;
}

.faq-item {
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding: 24px 0;
}

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    font-size: 20px;
    font-weight: 600;
    padding-right: 40px;
    position: relative;
}

.faq-question::after {
    content: '+';
    position: absolute;
    right: 0;
    font-size: 24px;
    transition: transform 0.3s ease;
}

.faq-question.active::after {
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: all 0.3s ease;
    opacity: 0;
    padding-top: 0;
}

.faq-answer.active {
    max-height: 200px;
    opacity: 0.8;
    padding-top: 16px;
}

.faq-answer p {
    font-size: 16px;
    line-height: 1.6;
}

.faq-image {
    height: 500px;
    box-shadow: 0 20px 80px rgba(0, 0, 0, 0.3);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

/* User Comments Section */
.comments-section {
    background: var(--background-light);
    padding-top: 120px;
    padding-bottom: 120px;
    overflow: hidden;
}

.comments-header {
    text-align: center;
    margin-bottom: 40px;
}

.danmaku-container {
    position: relative;
    height: 450px;
    width: 100%;
    overflow: hidden;
}

.danmaku-comment {
    position: absolute;
    white-space: nowrap;
    font-size: 18px;
    color: var(--primary-text);
    opacity: 0.9;
    animation-name: scroll-left;
    animation-timing-function: linear;
    animation-iteration-count: infinite;
    padding: 8px 16px;
    background: rgba(255, 255, 255, 0.8);
    border-radius: 20px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    will-change: transform;
}

@keyframes scroll-left {
    from { transform: translateX(100vw); }
    to { transform: translateX(-100%); }
}

.danmaku-comment:nth-child(1) { top: 5%; animation-duration: 30s; }
.danmaku-comment:nth-child(2) { top: 15%; animation-duration: 25s; animation-delay: 3s; }
.danmaku-comment:nth-child(3) { top: 25%; animation-duration: 35s; animation-delay: 6s; }
.danmaku-comment:nth-child(4) { top: 35%; animation-duration: 28s; animation-delay: 1s; }
.danmaku-comment:nth-child(5) { top: 45%; animation-duration: 32s; animation-delay: 4s; }
.danmaku-comment:nth-child(6) { top: 55%; animation-duration: 27s; animation-delay: 7s; }
.danmaku-comment:nth-child(7) { top: 65%; animation-duration: 33s; animation-delay: 2s; }
.danmaku-comment:nth-child(8) { top: 75%; animation-duration: 29s; animation-delay: 5s; }
.danmaku-comment:nth-child(9) { top: 85%; animation-duration: 31s; animation-delay: 8s; }
.danmaku-comment:nth-child(10) { top: 10%; animation-duration: 26s; animation-delay: 9s; }
.danmaku-comment:nth-child(11) { top: 20%; animation-duration: 34s; animation-delay: 10s; }
.danmaku-comment:nth-child(12) { top: 50%; animation-duration: 24s; animation-delay: 11s; }
.danmaku-comment:nth-child(13) { top: 90%; animation-duration: 36s; animation-delay: 12s; }

/* Footer */
footer {
    background: #000000;
    color: var(--secondary-text);
    padding: 80px 0 0 0;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-container {
    max-width: 1440px;
    margin: 0 auto;
    padding: 0 32px 60px 32px;
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 80px;
    align-items: flex-start;
}

.footer-about .footer-logo {
    font-size: 28px;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: white;
    margin-bottom: 20px;
}

.footer-about .footer-tagline {
    font-size: 16px;
    line-height: 1.6;
    opacity: 0.7;
    margin-bottom: 32px;
}

.footer-socials {
    display: flex;
    gap: 20px;
}

.footer-socials a {
    color: white;
    opacity: 0.7;
    text-decoration: none;
    font-size: 16px;
    transition: opacity 0.3s ease;
}

.footer-socials a:hover {
    opacity: 1;
}

.footer-links-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
}

.footer-links h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 24px;
    color: white;
    opacity: 0.9;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.footer-links a {
    color: var(--secondary-text);
    text-decoration: none;
    transition: color 0.3s ease;
    font-size: 15px;
}

.footer-links a:hover {
    color: white;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: 32px 0;
}

.footer-bottom-container {
    max-width: 1440px;
    margin: 0 auto;
    padding: 0 32px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.5);
}

.footer-legal-links {
    display: flex;
    gap: 24px;
}

.footer-legal-links a {
    color: rgba(255, 255, 255, 0.5);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-legal-links a:hover {
    color: white;
}

/* Lightbox Styles */
#lightbox {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.85);
    backdrop-filter: blur(8px);
    z-index: 9999;
    display: none;
    align-items: center;
    justify-content: center;
    cursor: zoom-out;
    animation: fadeIn 0.3s;
}
#lightbox.active {
    display: flex;
}
#lightbox-image {
    max-width: 90%;
    max-height: 90%;
    object-fit: contain;
    box-shadow: 0 20px 80px rgba(0,0,0,0.5);
}
.lightbox-close {
    position: absolute;
    top: 20px;
    right: 40px;
    color: white;
    font-size: 48px;
    font-weight: 300;
    cursor: pointer;
    transition: transform 0.3s ease;
}
.lightbox-close:hover {
    transform: scale(1.1);
}


/* Animations */
.fade-in {
    opacity: 0;
    transform: translateY(40px);
    transition: all 1s cubic-bezier(0.25, 0.1, 0.25, 1);
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Page Progress Indicator */
#page-progress {
    position: fixed;
    right: 20px;
    top: 50%;
    transform: translateY(-50%);
    display: none; /* Hidden on desktop */
    flex-direction: column;
    gap: 16px;
    z-index: 2000;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.5s ease;
    background: rgba(245, 245, 247, 0.7); /* Light grey with transparency */
    backdrop-filter: blur(10px); /* Glassy effect */
    padding: 12px 6px;
    border-radius: 20px;
    box-shadow: 0 4px 12px var(--shadow-light); /* Subtle shadow */
}
#page-progress.visible {
    opacity: 1;
    pointer-events: all;
}
.progress-dot {
    width: 8px;
    height: 8px;
    background: rgba(0,0,0,0.5); /* Increased contrast */
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.3s ease;
}
.progress-dot.active {
    background: var(--primary-text);
    transform: scale(1.5);
}

/* ===== NEW: Back to Top Button Styles ===== */
#back-to-top-btn {
    position: fixed;
    bottom: 90px;
    right: 27px;
    z-index: 1000;
    width: 56px;
    height: 56px;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border-light);
    border-radius: 50%;
    box-shadow: 0 8px 32px var(--shadow-light);
    color: var(--primary-text);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all 0.4s cubic-bezier(0.25, 0.1, 0.25, 1);
}

#back-to-top-btn:hover {
    background: var(--primary-text);
    color: white;
    transform: scale(1.1);
    cursor: pointer;
}

#back-to-top-btn.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

/* ===== NEW: Subscription Section Styles ===== */
.subscription-section {
    background: #000;
    padding: 70px 0;
}

.subscription-container {
    max-width: 600px;
    margin: 0 auto;
}

#subscription-form {
    display: flex;
    gap: 16px;
    background: #1d1d1f;
    padding: 8px;
    border-radius: 30px;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.subscription-input {
    flex-grow: 1;
    padding: 12px 24px;
    border: none;
    background: transparent;
    color: white;
    font-size: 16px;
    outline: none;
}

.subscription-input::placeholder {
    color: var(--secondary-text);
}

.subscription-btn {
    background: var(--accent-color);
    color: white;
    border: none;
    padding: 12px 28px;
    border-radius: 24px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.subscription-btn:hover {
    background: #5f151a;
    transform: scale(1.05);
}


/* Mobile Responsive */
@media (max-width: 1024px) {
    .nav-right {
        display: none;
    }
    .hamburger-menu {
        display: flex;
    }

    .advantages-grid, .product-advantages {
        grid-template-columns: repeat(2, 1fr);
        gap: 32px;
    }

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

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

    .comparison-grid {
        grid-template-columns: 1.2fr 1fr;
    }

    .footer-container {
        grid-template-columns: 1fr 1.5fr;
        gap: 60px;
    }
    .footer-links-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 40px 30px;
    }
}

@media (max-width: 768px) {
     #page-progress {
           display: flex;
     }
    .section {
        padding: 60px 0;
    }

    .container {
        padding: 0 20px;
    }

    .section-header {
        margin-bottom: 60px;
    }

    .advantages-grid, .strength-grid, .product-advantages, .industry-grid, .image-text-section, .choose-text-section, .faqs-section, .comparison-grid {
        grid-template-columns: 1fr;
    }

    /* ===== OPTIMIZED: Responsive Vertical Comparison ===== */
    #model-comparison.section {
        padding: 80px 0;
    }
    .vertical-comparison-grid {
        grid-template-columns: 1fr 1fr; /* Force two columns on mobile */
        gap: 5px; /* Reduce gap for mobile */
    }
    .product-header-v {
        padding: 20px 5px;
    }
    .product-header-v img {
        max-height: none; /* Remove max-height to respect aspect ratio */
        margin-bottom: 16px;
    }
    .product-header-v h3 {
        font-size: 16px;
        line-height: 1.2;
        min-height: 38px;
    }
    .product-header-v .price {
        font-size: 15px;
        margin-bottom: 16px;
    }
    .feature-block-v {
        padding: 20px 5px;
        min-height: 150px;
    }
    .feature-block-v svg {
        width: 28px;
        height: 28px;
        margin-bottom: 12px;
    }
    .feature-block-v h4 {
        font-size: 14px;
        line-height: 1.3;
        min-height: 2.6em; /* Reserve space for two lines to align content below */
        display: flex;
        align-items: center;
        justify-content: center;
    }
     .feature-block-v p {
         font-size: 13px;
         word-wrap: break-word;
      }

    .image-text-section {
        gap: 60px;
        text-align: center;
    }

    .image-text-section.reverse {
        direction: ltr;
    }

    .product-showcase {
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 60px;
    }
    .product-image-container {
        width: 100%;
        max-width: 400px;
    }
    .product-image-hero, .product-thumbnails {
        display: none;
    }
    .product-image-scroller {
        display: flex;
        overflow-x: auto;
        scroll-snap-type: x mandatory;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
        border-radius: 24px;
    }
    .product-image-scroller::-webkit-scrollbar {
        display: none;
    }
    .product-scroll-item {
        flex: 0 0 100%;
        scroll-snap-align: center;
    }
    .product-scroll-item img {
        width: 100%;
        height: auto;
        aspect-ratio: 1/1;
        object-fit: cover;
    }
    .product-info {
        display: flex;
        flex-direction: column;
        align-items: center;
        text-align: center;
        width: 100%;
        padding: 0;
    }
    .product-info .cta-buttons, .product-price {
        justify-content: center;
    }
    .scroll-indicator {
        display: block;
    }

    .specs-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    /* Mobile styles for attachments carousel */
    .product-hero .product-content {
        padding: 0;
    }
    .product-header, .product-showcase, .product-advantages, .specs-grid {
        padding: 0 20px;
    }
    .attachments-section .section-header {
        padding: 0 20px;
    }
    .attachments-carousel-wrapper {
        overflow-x: auto;
        scroll-snap-type: x mandatory;
        scrollbar-width: none;
        -webkit-overflow-scrolling: touch;
        transform: none !important;
        padding: 0 20px;
    }
    .attachments-carousel-wrapper::-webkit-scrollbar {
        display: none;
    }
    .attachment-card {
        flex: 0 0 80%;
        scroll-snap-align: center;
    }
    .attachments-section .carousel-controls {
        padding: 0 20px;
    }

    .scenarios-section .container {
        padding: 0;
    }
    .scenarios-section .section-header {
        padding: 0 20px;
    }
    .carousel-container {
        padding-top: 0;
        margin-top: 0;
        padding-bottom: 0;
        margin-bottom: 0;
    }
    .carousel-wrapper {
        -webkit-overflow-scrolling: touch;
        overflow-x: auto;
        padding: 0 20px;
        scroll-behavior: smooth;
        scroll-snap-type: x mandatory;
        scrollbar-width: none;
        transform: none !important;
    }
    .carousel-wrapper::-webkit-scrollbar {
        display: none;
    }
    .carousel-slide {
        flex: 0 0 95%;
        scroll-snap-align: center;
        min-width: 0;
    }
    .carousel-controls {
        padding: 0 20px;
        justify-content: flex-end;
    }

    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }

    .btn-primary,
    .btn-secondary,
    .btn-solid-white,
    .btn-dark {
        width: 280px;
        text-align: center;
    }

    .footer-container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    .footer-about {
        display: flex;
        flex-direction: column;
        align-items: center;
    }
    .footer-links-grid {
        grid-template-columns: repeat(2, 1fr);
        text-align: center;
    }
    .footer-bottom-container {
        flex-direction: column;
        gap: 20px;
    }
     .hero {
           padding-top: 90px;
           padding-bottom: 80px;
     }

    /* ===== NEW: Responsive Subscription Section ===== */
    #subscription-form {
        flex-direction: column;
        background: transparent;
        border: none;
        padding: 0;
        gap: 20px;
    }

    .subscription-input {
        background: #1d1d1f;
        border: 1px solid rgba(255, 255, 255, 0.1);
        border-radius: 24px;
        text-align: center;
    }

    .subscription-btn {
        width: 100%;
        max-width: 280px;
        margin: 0 auto;
    }
}