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

:root {
    --primary-color: #19D0B2;
    --secondary-color: #41E8CD;
    --accent-color: #68F0DE;
    --dark-color: #0A8F7A;
    --light-color: #ffffff;
    --text-color: #333333;
    --text-secondary: #666666;
    --border-color: #e0e6ed;
    --card-bg: rgba(255, 255, 255, 0.95);
    --gradient-primary: linear-gradient(135deg, #19D0B2, #41E8CD);
    --gradient-secondary: linear-gradient(135deg, #41E8CD, #68F0DE);
    --shadow-primary: 0 4px 20px rgba(25, 208, 178, 0.2);
    --shadow-secondary: 0 8px 30px rgba(25, 208, 178, 0.3);
    --border-radius: 12px;
    --transition: all 0.3s ease;
}

body {
    font-family: 'Segoe UI', 'Microsoft YaHei', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f8f9fa;
    color: var(--text-color);
    line-height: 1.6;
    overflow-x: hidden;
    background-image: 
        radial-gradient(circle at 10% 20%, rgba(25, 208, 178, 0.08) 0%, transparent 30%),
        radial-gradient(circle at 90% 80%, rgba(65, 232, 205, 0.08) 0%, transparent 30%),
        radial-gradient(circle at 50% 50%, rgba(104, 240, 222, 0.05) 0%, transparent 40%);
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
	height:100%;
}

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(240, 255, 245, 0.8);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 15px rgba(25, 208, 178, 0.3);
    padding: 1rem 0;
    transition: var(--transition);
    border-bottom: 1px solid rgba(25, 208, 178, 0.2);
}

.navbar:hover {
    background: rgba(240, 255, 245, 0.9);
    box-shadow: 0 4px 20px rgba(25, 208, 178, 0.4);
}

.navbar .container {
    display: flex;
    flex-wrap: nowrap;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    min-width: 0;
}

.navbar-brand {
    flex-shrink: 0;
}

.navbar-brand .logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-color);
}

.logo-icon {
    width: 3rem;
	height:3rem;
    animation: pulse 2s infinite;
}

.logo-icon img {
	width:100%;
}

.logo-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.navbar-menu {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    align-content: center;
    column-gap: 1rem;
    row-gap: 0;
    flex: 1;
    min-width: 0;
    justify-items: stretch;
}

.nav-links {
    display: flex;
    flex-wrap: nowrap;
    align-items: center;
    justify-content: flex-end;
    gap: 0 1.25rem;
    list-style: none;
    margin: 0;
    padding: 0 0 4px;
    min-width: 0;
    max-width: 100%;
    overflow-x: auto;
    overflow-y: hidden;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: thin;
    overscroll-behavior-x: contain;
}

.nav-links::-webkit-scrollbar {
    height: 6px;
}

.nav-links::-webkit-scrollbar-thumb {
    background: rgba(25, 208, 178, 0.35);
    border-radius: 3px;
}

.nav-links li {
    flex-shrink: 0;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
    font-weight: 500;
    position: relative;
    padding: 0.5rem 0;
	font-size:1.1rem;
}

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

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: var(--transition);
}

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

.navbar-actions {
    display: flex;
    align-items: center;
    flex-wrap: nowrap;
    gap: 0.75rem 1rem;
    flex-shrink: 0;
    justify-content: flex-end;
}

.language-selector {
    position: relative;
}

.language-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    background: rgba(25, 208, 178, 0.1);
    border: 1px solid rgba(25, 208, 178, 0.2);
    border-radius: var(--border-radius);
    padding: 0.5rem 0.875rem;
    cursor: pointer;
    transition: var(--transition);
    font-weight: 500;
    color: var(--text-color);
    min-height: 2.6rem;
    height: auto;
    line-height: 1.35;
    text-align: center;
    white-space: normal;
    word-break: break-word;
    overflow-wrap: anywhere;
    max-width: min(100%, 22rem);
    box-sizing: border-box;
}

.language-btn:hover {
    background: rgba(25, 208, 178, 0.2);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.language-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: 0.5rem;
    background-color: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-primary);
    padding: 0.5rem 0;
    min-width: 160px;
    max-height: min(70vh, 320px);
    overflow-y: auto;
    overflow-x: hidden;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 1000;
}

.language-selector:hover .language-dropdown {
    opacity: 1;
    visibility: visible;
}

.language-option {
    display: block;
    padding: 0.75rem 1rem;
    color: var(--text-color);
    text-decoration: none;
    transition: var(--transition);
}

.language-option:hover {
    background-color: rgba(25, 208, 178, 0.05);
    color: var(--primary-color);
}

.download-btn {
    font-size: 0.9rem;
    padding: 0.5rem 1rem;
    font-weight: 500;
    background: var(--gradient-primary);
    border: 2px solid var(--primary-color);
    border-radius: 25px;
    color: white;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 8px rgba(25, 208, 178, 0.2);
    min-height: 2.5rem;
    height: auto;
    line-height: 1.35;
    text-align: center;
    white-space: normal;
    word-break: break-word;
    overflow-wrap: anywhere;
    max-width: min(100%, 20rem);
    box-sizing: border-box;
}

.download-btn:hover {
    background: var(--gradient-secondary);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(25, 208, 178, 0.3);
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    z-index: 1001;
}

.mobile-menu-btn span {
    width: 25px;
    height: 3px;
    background: var(--primary-color);
    border-radius: 3px;
    transition: var(--transition);
    transform-origin: center;
}

.mobile-menu-btn.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 6px);
}

.mobile-menu-btn.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-btn.active span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -7px);
}

.hero {
    padding: 12rem 0 6rem;
    position: relative;
    overflow: hidden;
	background: url(../images/banner_bg.jpg) no-repeat center;
	background-size:cover;
	height: 80vh;
}

.hero-content {
    text-align: left;
    position: relative;
    z-index: 2;
	max-width: 500px;
	height:100%;
	display: flex;
	justify-content: center;
	flex-direction: column;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
    color: #ffffff;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 2.5rem;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 1.5rem;
    justify-content: flex-start;
    flex-wrap: wrap;
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--light-color);
    border: none;
    padding: 1rem 1.75rem;
    border-radius: var(--border-radius);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-primary);
    font-size: 1.1rem;
    line-height: 1.35;
    text-align: center;
    white-space: normal;
    word-break: break-word;
    overflow-wrap: anywhere;
    max-width: 100%;
    box-sizing: border-box;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-secondary);
}

.btn-secondary {
    background-color: #ffffff;
    color: var(--primary-color);
    border: 2px solid #ffffff;
    padding: 1rem 1.75rem;
    border-radius: var(--border-radius);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    line-height: 1.35;
    text-align: center;
    white-space: normal;
    word-break: break-word;
    overflow-wrap: anywhere;
    max-width: 100%;
    box-sizing: border-box;
}

.btn-secondary:hover {
    background-color: transparent;
    color: #ffffff;
    border-color: #ffffff;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 50%, rgba(25, 208, 178, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 50%, rgba(65, 232, 205, 0.1) 0%, transparent 50%);
    z-index: 1;
}

.format-grid-section {
    padding: 4rem 0;
    background-color: #f8f9fa;
}

.format-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 1.5rem;
}

.format-card {
    background-color: white;
    border:none;
    border-radius: var(--border-radius);
    padding: 2rem 1.5rem;
    text-align: center;
    transition: var(--transition);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.format-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-primary);
    border-color: var(--primary-color);
}

.format-card-icon {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 1.5rem;
    margin: 0 auto 1.25rem;
    color: white;
}

.format-card-icon.epub-mobi {
    background: linear-gradient(135deg, #3B82F6, #60A5FA);
}

.format-card-icon.epub-txt {
    background: linear-gradient(135deg, #10B981, #34D399);
}

.format-card-icon.epub-azw3 {
    background: linear-gradient(135deg, #8B5CF6, #A78BFA);
}

.format-card-icon.file-txt {
    background: linear-gradient(135deg, #F59E0B, #FBBF24);
}

.format-card-icon.file-pdf {
    background: linear-gradient(135deg, #EF4444, #F87171);
}

.format-card-icon.file-mobi {
    background: linear-gradient(135deg, #F59E0B, #FBBF24);
}

.format-card-icon.file-epub {
    background: linear-gradient(135deg, #3B82F6, #60A5FA);
}

.format-card-icon.file-fb2 {
    background: linear-gradient(135deg, #EC4899, #F472B6);
}

.format-card-icon.file-azw3 {
    background: linear-gradient(135deg, #8B5CF6, #A78BFA);
}

.format-card-icon.more-formats {
    background: linear-gradient(135deg, #19D0B2, #41E8CD);
}

.format-card-text {
    font-size: 1.3rem;
    color: var(--text-color);
}

.converter-section {
    padding: 6rem 0;
    position: relative;
    background-color: white;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-color);
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.converter-card {
    background-color: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 3rem;
    box-shadow: var(--shadow-primary);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    border: 1px solid rgba(25, 208, 178, 0.1);
}

.upload-area {
    border: 2px dashed var(--primary-color);
    border-radius: var(--border-radius);
    padding: 3rem 2rem;
    text-align: center;
    transition: var(--transition);
    background-color: rgba(25, 208, 178, 0.02);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 300px;
}

.upload-area:hover,
.upload-area.drag-over {
    background-color: rgba(25, 208, 178, 0.05);
    border-color: var(--secondary-color);
}

.upload-icon {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    transition: var(--transition);
	width:3.0rem;
	height:3.0rem;
}
.upload-icon img {
	width:100%;
}

.upload-area:hover .upload-icon {
    transform: scale(1.1);
}

.upload-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--text-color);
}

.upload-desc {
    color: var(--text-secondary);
    margin-bottom: 2rem;
    font-size: 0.95rem;
}

.file-input {
    display: none;
}

.upload-btn {
    background: var(--gradient-primary);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius);
	font-size:1.2rem;
	font-weight: bold;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow-primary);
    line-height: 1.35;
    white-space: normal;
    word-break: break-word;
    overflow-wrap: anywhere;
    text-align: center;
    max-width: 100%;
}

.upload-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-secondary);
}

.options-area {
    display: flex;
    flex-direction: column;
}

.options-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: var(--text-color);
}

.format-options {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    margin-bottom: 2rem;
}

.format-option {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    background-color: white;
}

.format-option:hover {
    border-color: var(--primary-color);
    background-color: rgba(25, 208, 178, 0.02);
}

.format-option input[type="radio"] {
    display: none;
}

.format-option input[type="radio"]:checked ~ .format-name {
    color: var(--primary-color);
    font-weight: 600;
}

.format-icon {
    width: 2.4rem;
	height:2.4rem;
    transition: var(--transition);
}
.format-icon img {
	width:100%;
}

.format-name {
    font-size: 1.2rem;
    color: var(--text-color);
    transition: var(--transition);
}

.advanced-options {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-bottom: 2rem;
}

.checkbox-option {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
    font-size: 1rem;
    color: var(--text-color);
}

.checkbox-option input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--primary-color);
    cursor: pointer;
}

.convert-btn {
    background: var(--gradient-secondary);
    color: white;
    border: none;
    padding: 1rem 1.5rem;
    border-radius: var(--border-radius);
    font-weight: 600;
    font-size: 1.1rem;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow-primary);
    margin-top: auto;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    text-decoration: none;
    box-sizing: border-box;
    width: 100%;
    line-height: 1.35;
    white-space: normal;
    word-break: break-word;
    overflow-wrap: anywhere;
}

.convert-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-secondary);
}

.features-section {
    padding: 6rem 0;
    background-color: #f8f9fa;
    position: relative;
}

.feature-section {
    display: flex;
    align-items: center;
    gap: 2rem;
    margin-bottom: 4rem;
    transition: var(--transition);
}

.feature-section:hover {
    transform: translateY(-3px);
}

.feature-left-image {
    flex-direction: row;
}

.feature-right-image {
    flex-direction: row-reverse;
}

.feature-image {
    flex: 1;
    max-width: 50%;
    overflow: hidden;
}

.feature-image img {
    width: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.feature-section:hover .feature-image img {
    transform: scale(1.05);
}

.feature-content {
    flex: 1;
    max-width: 50%;
}

.feature-title {
    font-size: 1.9rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.feature-desc {
    color: var(--text-secondary);
    font-size: 1.1rem;
    line-height: 2.2rem;
    margin: 0;
}

.library-section {
    padding: 6rem 0;
    background-color: white;
    position: relative;
}

.carousel-3d-wrapper {
    position: relative;
    width: 100%;
    max-width: 900px;
    margin: 0 auto;
    perspective: 1200px;
}

.carousel-3d {
    position: relative;
    width: 100%;
    height: 450px;
    transform-style: preserve-3d;
}

.carousel-item {
    position: absolute;
    width: 60%;
    height: 100%;
    left: 20%;
    top: 0;
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
    opacity: 0;
    visibility: hidden;
}

.carousel-item.active {
    opacity: 1;
    visibility: visible;
    transform: translateZ(0px) rotateY(0deg);
    z-index: 3;
}

.carousel-item.prev {
    opacity: 0.6;
    visibility: visible;
    transform: translateX(-100%) translateZ(-150px) rotateY(25deg);
    z-index: 2;
}

.carousel-item.next {
    opacity: 0.6;
    visibility: visible;
    transform: translateX(100%) translateZ(-150px) rotateY(-25deg);
    z-index: 2;
}

.carousel-card {
    width: 100%;
    height: 100%;
    background: white;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
    transition: var(--transition);
}

.carousel-item.active .carousel-card {
    box-shadow: 0 25px 80px rgba(25, 208, 178, 0.25);
}

.carousel-image {
    width: 100%;
    height: 280px;
    overflow: hidden;
}

.carousel-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.carousel-item.active .carousel-image img {
    transform: scale(1.02);
}

.carousel-content {
    padding: 1.5rem 2rem;
    text-align: center;
}

.carousel-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.carousel-desc {
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.6;
    margin: 0;
}

.carousel-controls {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    margin-top: 2rem;
}

.carousel-btn {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    border: 2px solid var(--primary-color);
    background: white;
    color: var(--primary-color);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
	font-size:3.0rem;
}

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

.carousel-indicators {
    display: flex;
    gap: 0.75rem;
}

.indicator {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--border-color);
    cursor: pointer;
    transition: var(--transition);
}

.indicator.active {
    background: var(--gradient-primary);
    transform: scale(1.2);
}

.indicator:hover {
    background: var(--primary-color);
}

.ai-section {
    padding: 6rem 0;
    background-color: #f8f9fa;
    position: relative;
}

.ai-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.ai-card {
    background-color: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 2rem;
    text-align: center;
    border: 1px solid rgba(25, 208, 178, 0.1);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.ai-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: var(--transition);
}

.ai-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-primary);
}

.ai-card:hover::before {
    transform: scaleX(1);
}

.ai-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    border-radius: 50%;
    color: white;
    transition: var(--transition);
}
.ai-icon img {
	width:56%;
}

.ai-card:hover .ai-icon {
    transform: scale(1.1);
}

.ai-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--text-color);
}

.ai-desc {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
    margin: 0;
}

.steps-section {
    padding: 6rem 0;
    background-color: white;
    position: relative;
}

.steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

@media (min-width: 1200px) {
    .steps-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

.step-card {
    display: flex;
    flex-direction: column;
    padding: 1.5rem;
    background-color: white;
    border-radius: var(--border-radius);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.step-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-primary);
}

.step-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--text-color);
}

.step-desc {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.step-image {
    width: 100%;
    height: 320px;
    border-radius: 8px;
    overflow: hidden;
    background-color: #f0f0f0;
}

.step-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.step-card:hover .step-image img {
    transform: scale(1.02);
}

.download-section {
    padding: 6rem 0;
    background-color: #e6f7f5;
    position: relative;
    overflow: hidden;
}

.download-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 100%;
    z-index: 0;
}

.download-circle {
    position: absolute;
    border-radius: 50%;
    opacity: 0.1;
    animation: float 6s ease-in-out infinite;
}

.download-circle-1 {
    width: 200px;
    height: 200px;
    background: #19D0B2;
    top: -50px;
    left: 10%;
    animation-delay: 0s;
}

.download-circle-2 {
    width: 150px;
    height: 150px;
    background: #41E8CD;
    top: 50%;
    right: 10%;
    animation-delay: 2s;
}

.download-circle-3 {
    width: 100px;
    height: 100px;
    background: #68F0DE;
    bottom: -30px;
    left: 30%;
    animation-delay: 4s;
}

.download-circle-4 {
    width: 80px;
    height: 80px;
    background: #19D0B2;
    top: 20%;
    right: 30%;
    animation-delay: 1s;
}

.download-circle-5 {
    width: 180px;
    height: 180px;
    background: #41E8CD;
    top: 30%;
    left: 5%;
    animation-delay: 3s;
    z-index: 1;
}

.download-circle-6 {
    width: 120px;
    height: 120px;
    background: #68F0DE;
    bottom: 10%;
    right: 15%;
    animation-delay: 5s;
    z-index: 1;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px) scale(1);
    }
    50% {
        transform: translateY(-20px) scale(1.05);
    }
}

.download-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    position: relative;
    z-index: 1;
}

.download-cards--windows-only {
    max-width: 560px;
    margin-left: auto;
    margin-right: auto;
    grid-template-columns: 1fr;
}

.download-card {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    background: white;
    border: 2px solid var(--border-color);
    border-radius: 16px;
    padding: 2rem;
    text-decoration: none;
    transition: var(--transition);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    position: relative;
    overflow: hidden;
}

.download-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: var(--transition);
}

.download-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-secondary);
    border-color: var(--primary-color);
}

.download-card:hover::before {
    transform: scaleX(1);
}

.download-card-icon {
    width: 72px;
    height: 72px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    background:#E8FAF7;
    color: var(--primary-color);
    flex-shrink: 0;
    transition: var(--transition);
}
.download-card-icon img {
	width:80%;
}

.download-card-content {
    flex: 1;
}

.download-card-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--text-color);
}

.download-card-desc {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
}

.download-card-version {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: rgba(25, 208, 178, 0.1);
    color: var(--primary-color);
    border-radius: 12px;
    font-size: 0.85rem;
    font-weight: 600;
}

.download-card-arrow {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: rgba(25, 208, 178, 0.1);
    color: var(--primary-color);
    transition: var(--transition);
    flex-shrink: 0;
}

.download-card:hover .download-card-arrow {
    background: var(--gradient-primary);
    color: white;
    transform: translateX(5px);
}

@media (max-width: 768px) {
    .download-section {
        padding: 4rem 0;
    }
    
    .download-cards {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .download-card {
        padding: 1.5rem;
        gap: 1rem;
    }
    
    .download-card-icon {
        width: 56px;
        height: 56px;
    }
    
    .download-card-title {
        font-size: 1.25rem;
    }
    
    .download-card-desc {
        font-size: 0.9rem;
    }
    
    .download-circle-1 {
        width: 150px;
        height: 150px;
    }
    
    .download-circle-2 {
        width: 120px;
        height: 120px;
    }
    
    .download-circle-3 {
        width: 80px;
        height: 80px;
    }
    
    .download-circle-4 {
        width: 60px;
        height: 60px;
    }
    
    .download-circle-5 {
        width: 140px;
        height: 140px;
    }
    
    .download-circle-6 {
        width: 90px;
        height: 90px;
    }
	.features-section {
		padding:1rem 0;
	}
}

.footer {
    background-color: #1a2433;
    padding: 4rem 0 2rem;
    position: relative;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
    margin-bottom: 3rem;
    align-items: center;
}

@media (min-width: 992px) {
    .footer-content {
        grid-template-columns: 1fr auto;
        gap: 3rem;
        align-items: start;
    }
}

.footer-brand .logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: white;
    margin-bottom: 1rem;
}

.brand-description {
    color: #a0aec0;
    font-size: 0.95rem;
    line-height: 1.6;
    max-width: 400px;
}

.footer-nav {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: clamp(0.75rem, 2vw, 2rem);
}

@media (min-width: 992px) {
    .footer-nav {
        justify-content: flex-end;
    }
}

.footer-nav a {
    color: #cbd5e1;
    text-decoration: none;
    font-size: 0.95rem;
    transition: var(--transition);
    white-space: nowrap;
}

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

.footer-bottom {
    display: flex;
    justify-content: center;
    align-items: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(107, 142, 35, 0.1);
    flex-wrap: wrap;
    gap: 1rem;
}

.copyright {
    color: #a0aec0;
    font-size: 0.9rem;
    text-align: center;
}

.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    border: none;
    border-radius: 50%;
    color: var(--light-color);
    font-size: 1.25rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-primary);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 999;
}
.back-to-top img {
	width:70%;
}

.back-to-top:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-secondary);
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.1);
    }
}

@media (max-width: 992px) {
    .format-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .feature-section {
        flex-direction: column;
        gap: 1rem;
		border-bottom: 1px dotted #8de2d4;
		padding-bottom: 2rem;
		margin-bottom: 2rem;
    }
	.feature-section:last-child {
		border-bottom:none;
	}
    
    .feature-left-image,
    .feature-right-image {
        flex-direction: column;
    }
    
    .feature-image,
    .feature-content {
        max-width: 100%;
        width: 100%;
    }
    
    .feature-image img {
        height: 250px;
    }
    
    .navbar-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: rgba(240, 255, 245, 0.95);
        flex-direction: column;
        padding: 1rem;
        box-shadow: 0 4px 15px rgba(25, 208, 178, 0.3);
        gap: 1rem;
        border-bottom: 1px solid rgba(25, 208, 178, 0.2);
    }

    .navbar-menu.active {
        display: flex;
    }

    .nav-links {
        flex-direction: column;
        flex-wrap: nowrap;
        width: 100%;
        text-align: center;
        overflow-x: visible;
        overflow-y: visible;
        padding-bottom: 0;
        max-width: none;
    }

    .nav-links li {
        flex-shrink: 1;
    }

    .nav-links a {
        color: var(--text-secondary);
    }

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

    .navbar-actions {
        width: 100%;
        gap: 1rem;
    }

    .language-selector {
        width: 100%;
    }

    .language-btn {
        width: 100%;
        justify-content: center;
        background: rgba(25, 208, 178, 0.1);
        border: 1px solid rgba(25, 208, 178, 0.2);
        color: var(--text-color);
		border-radius: 10rem;
		font-size:1.0rem;
    }

    .language-dropdown {
        left: 0;
        right: 0;
        min-width: unset;
    }

    .download-btn {
        width: 100%;
        max-width: 100%;
        min-height: unset;
        text-align: center;
        background: var(--gradient-primary);
        border: 2px solid var(--primary-color);
        border-radius: 25px;
        color: white;
        transition: all 0.3s ease;
        box-shadow: 0 2px 8px rgba(25, 208, 178, 0.2);
		font-size:1.0rem;
		display: flex;
		justify-content: center;
		align-items: center;
    }

    .download-btn:hover {
        background: var(--gradient-secondary);
        color: white;
        transform: translateY(-2px);
        box-shadow: 0 4px 12px rgba(25, 208, 178, 0.3);
    }

    .mobile-menu-btn {
        display: flex;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .converter-card {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .format-options {
        grid-template-columns: 1fr;
    }

    .download-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }

    .download-left {
        padding-right: 0;
    }

    .download-btn {
        max-width: min(100%, 26rem);
        margin: 0 auto;
    }

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

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

    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 768px) {
	
	.hero-content {
		background:rgba(255,255,255,.3);
		border-radius: 2rem;
		padding: 0 2rem;
	}
    .format-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
	.library-section {
		padding-top:3rem;
	}
	
    .carousel-3d {
        height: 400px;
    }
    
    .carousel-item {
        width: 80%;
        left: 10%;
    }
    
    .carousel-image {
        height: 220px;
    }
    
    .carousel-content {
        padding: 1rem 1.5rem;
    }
    
    .carousel-title {
        font-size: 1.3rem;
    }
    
    .hero {
        padding: 10rem 0 4rem;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .converter-card {
        padding: 2rem;
    }

    .upload-area {
        padding: 2rem 1rem;
        min-height: 250px;
    }

    .features-grid,
    .library-grid,
    .steps-grid {
        grid-template-columns: 1fr;
    }
	
	.ai-grid {
		display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
	}

    .step-card {
        flex-direction: column;
        text-align: center;
        align-items: center;
    }

    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
	.format-card-text {
		font-size:1.1rem;
	}
	.feature-title {
		font-size:1.6rem;
	}
	.feature-desc {
		font-size:1.0rem;
		line-height: 1.8rem;
	}
}

@media (max-width: 576px) {
    
    .format-card {
        padding: 1.5rem 1rem;
    }
    
    .format-card-icon {
        width: 50px;
        height: 50px;
        font-size: 1rem;
    }
    
    .carousel-3d {
        height: 380px;
    }
    
    .carousel-item {
        width: 100%;
        left: 0;
    }
    
    .carousel-item.prev,
    .carousel-item.next {
        opacity: 0;
        visibility: hidden;
        transform: none;
    }
    
    .carousel-item.active {
        width: 100%;
        left: 0;
    }
    
    .carousel-image {
        height: 200px;
    }
    
    .carousel-content {
        padding: 1rem;
    }
    .carousel-btn {
        width: 40px;
        height: 40px;
        font-size: 1.25rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .btn-primary,
    .btn-secondary {
        width: 100%;
        max-width: min(100%, 26rem);
    }

    .converter-card {
        padding: 1.5rem;
    }

    .upload-area {
        padding: 1.5rem 1rem;
    }

    .feature-card,
    .library-card,
    .ai-card,
    .step-card {
        padding: 1rem;
    }
	.ai-desc {
		text-align: left;
	}
	.step-image {
		height:auto;
		background: none;
		border-radius: 0;
	}
	.step-image img {
		height:auto;
	}

    .feature-icon,
    .ai-icon {
        width: 60px;
        height: 60px;
    }

    .download-title {
        font-size: 1.75rem;
    }

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .footer-nav {
        justify-content: center;
        gap: 0.65rem 1rem;
    }

    .footer-nav a {
        font-size: 0.85rem;
    }
}