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

:root {
    --primary-blue: #0066ff;
    --primary-blue-light: #3385ff;
    --primary-blue-dark: #0044cc;
    --dark-bg: #0a0a0f;
    --dark-surface: #12121a;
    --dark-card: #1a1a25;
    --dark-border: #2a2a3a;
    --text-primary: #ffffff;
    --text-secondary: #a0a0b0;
    --text-muted: #606070;
    --gradient-blue: linear-gradient(135deg, #0066ff 0%, #0044cc 50%, #0033aa 100%);
    --gradient-dark: linear-gradient(180deg, #0a0a0f 0%, #12121a 50%, #1a1a25 100%);
    --gradient-hero: linear-gradient(135deg, rgba(0, 102, 255, 0.1) 0%, rgba(0, 68, 204, 0.05) 100%);
    --shadow-blue: 0 0 40px rgba(0, 102, 255, 0.3);
    --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.3);
    --border-radius: 12px;
    --border-radius-lg: 20px;
    --transition: all 0.3s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    background: var(--dark-bg);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    font-size: 18px;
}

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

.bg-animation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
}

.bg-gradient {
    position: absolute;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #0a0a0f 0%, #0d1020 25%, #0a1525 50%, #0a0a0f 100%);
}

.bg-gradient::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(ellipse at center, rgba(0, 102, 255, 0.08) 0%, transparent 50%);
    animation: pulse 15s ease-in-out infinite;
}

.bg-gradient::after {
    content: '';
    position: absolute;
    bottom: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(ellipse at center, rgba(0, 68, 204, 0.06) 0%, transparent 50%);
    animation: pulse 20s ease-in-out infinite reverse;
}

@keyframes pulse {
    0%, 100% { transform: scale(1) rotate(0deg); opacity: 0.5; }
    50% { transform: scale(1.2) rotate(180deg); opacity: 0.8; }
}

.bg-grid {
    position: absolute;
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(rgba(0, 102, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 102, 255, 0.03) 1px, transparent 1px);
    background-size: 50px 50px;
}

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 15px 0;
    background: transparent;
    backdrop-filter: blur(20px);
    border-bottom: 1px solid transparent;
    transition: var(--transition);
}

.navbar.scrolled {
    background: linear-gradient(135deg, rgba(10, 10, 15, 0.95) 0%, rgba(13, 16, 32, 0.95) 100%);
    border-bottom: 1px solid rgba(0, 102, 255, 0.2);
    box-shadow: 0 4px 20px rgba(0, 102, 255, 0.1);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.navbar-brand .logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-icon {
    width:3.6rem;
	height:3.6rem;
}
.logo-icon img {
	width:100%;
}

.logo-text {
    font-size: 24px;
    font-weight: 700;
    background: var(--gradient-blue);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.navbar-menu {
    display: flex;
    align-items: center;
    gap: 40px;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 18px;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-blue);
    transition: var(--transition);
}

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

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

.nav-links a.active {
    color: var(--primary-blue-light);
}

.nav-links a.active::after {
    width: 100%;
    background: var(--primary-blue);
}

.download-btn {
    display: inline-flex;
    align-items: center;
    padding: 0px 30px;
    background: var(--gradient-blue);
    color: var(--text-primary);
    text-decoration: none;
    border-radius: 25px;
    font-size: 16px;
    font-weight: normal;
    transition: var(--transition);
    box-shadow: var(--shadow-blue);
	height:50px;
}

.download-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 60px rgba(0, 102, 255, 0.5);
}

.navbar-actions {
    display: flex;
    align-items: center;
    gap: 20px;
}

.language-selector {
    position: relative;
}

.lang-btn {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 0px 14px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--dark-border);
    border-radius: 30px;
    cursor: pointer;
    transition: var(--transition);
    color: var(--text-primary);
	height:50px;
}

.lang-btn:hover {
    background: rgba(0, 102, 255, 0.1);
    border-color: var(--primary-blue);
}

.lang-icon {
    width:1.1rem;
	height:1.1rem;
}
.lang-icon img {
	width:100%;
}

.lang-current {
    font-size: 16px;
    font-weight: 500;
}

.lang-arrow {
    font-size: 10px;
    color: var(--text-muted);
    transition: var(--transition);
}

.lang-btn.active .lang-arrow {
    transform: rotate(180deg);
}

.lang-dropdown {
    position: absolute;
    top: calc(100% + 10px);
    right: 0;
    min-width: 150px;
    background: var(--dark-card);
    border: 1px solid var(--dark-border);
    border-radius: var(--border-radius);
    padding: 8px 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: var(--transition);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
    z-index: 1100;
}

.lang-dropdown.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.lang-option {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 16px;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    transition: var(--transition);
}

.lang-option:hover {
    background: rgba(0, 102, 255, 0.1);
    color: var(--text-primary);
}

.lang-option.active {
    color: var(--primary-blue-light);
    background: rgba(0, 102, 255, 0.1);
}

.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--gradient-blue);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: var(--transition);
    box-shadow: var(--shadow-blue);
    z-index: 999;
}
.back-to-top img {
	width:70%;
}

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

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 40px rgba(0, 102, 255, 0.5);
}

.back-to-top-icon {
    font-size: 20px;
    color: var(--text-primary);
    font-weight: bold;
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 40px;
    height: 40px;
    background: transparent;
    border: none;
    cursor: pointer;
    gap: 6px;
}

.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition);
}

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

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

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

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 120px 0 80px;
    position: relative;
    background: linear-gradient(135deg, #0a0a0f 0%, #0d1020 50%, #0a1525 100%);
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 30% 30%, rgba(0, 102, 255, 0.1) 0%, transparent 50%);
    animation: pulse 8s ease-in-out infinite;
    z-index: 0;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 100px;
    background: linear-gradient(180deg, transparent 0%, #0a0a0f 100%);
    z-index: 1;
}

.hero-shapes {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    perspective: 1000px;
    overflow: hidden;
}

.shape {
    position: absolute;
    width: 450px;
    height: 450px;
    background: linear-gradient(135deg, rgba(0, 102, 255, 0.05) 0%, rgba(0, 68, 204, 0.02) 100%);
    backdrop-filter: blur(3px);
    animation: rotate3d 20s linear infinite;
    transform-style: preserve-3d;
}

.shape1 {
    top: 15%;
    left: 10%;
    animation-duration: 25s;
}

.shape2 {
    bottom: 20%;
    right: 15%;
    width: 380px;
    height: 380px;
    animation-duration: 30s;
    animation-name: rotate3dAlt;
}

@keyframes rotate3dAlt {
    0% {
        transform: perspective(1000px) rotateY(0deg) rotateX(-20deg);
    }
    100% {
        transform: perspective(1000px) rotateY(360deg) rotateX(-20deg);
    }
}

@keyframes rotate3d {
    0% {
        transform: perspective(1000px) rotateY(0deg) rotateX(15deg);
    }
    100% {
        transform: perspective(1000px) rotateY(360deg) rotateX(15deg);
    }
}

.hero-content {
    z-index: 2;
    position: relative;
    animation: fadeInUp 1s ease-out;
}

.hero-visual {
    position: relative;
    z-index: 2;
    animation: fadeInRight 1s ease-out 0.3s both;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 0.5; }
    50% { transform: scale(1.2); opacity: 0.8; }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

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

.hero-title {
    font-size: 56px;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 20px;
    background: linear-gradient(135deg, #ffffff 0%, #0066ff 50%, #0044cc 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-visual {
    position: relative;
    z-index: 2;
}

.hero-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 40px;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    margin-bottom: 50px;
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    padding: 16px 36px;
    background: var(--gradient-blue);
    color: var(--text-primary);
    text-decoration: none;
    border-radius: 30px;
    font-size: 16px;
    font-weight: 600;
    transition: var(--transition);
    box-shadow: var(--shadow-blue);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 0 60px rgba(0, 102, 255, 0.5);
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    padding: 16px 36px;
    background: transparent;
    color: var(--text-primary);
    text-decoration: none;
    border-radius: 30px;
    font-size: 16px;
    font-weight: 600;
    border: 2px solid var(--dark-border);
    transition: var(--transition);
}

.btn-secondary:hover {
    border-color: var(--primary-blue);
    background: rgba(0, 102, 255, 0.1);
}

.hero-stats {
    display: flex;
    gap: 50px;
}

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

.stat-number {
    display: block;
    font-size: 36px;
    font-weight: 700;
    color: var(--primary-blue);
    line-height: 1;
}

.stat-label {
    font-size: 14px;
    color: var(--text-muted);
    margin-top: 8px;
}

.hero-visual {
    position: relative;
    z-index: 1;
}

.converter-preview {
    background: var(--dark-card);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--dark-border);
    overflow: hidden;
    box-shadow: var(--shadow-card);
    animation: bounce 3s ease-in-out infinite;
}

@keyframes bounce {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-20px);
    }
}

.preview-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    background: var(--dark-surface);
    border-bottom: 1px solid var(--dark-border);
}

.preview-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.preview-dot.red { background: #ff5f57; }
.preview-dot.yellow { background: #ffbd2e; }
.preview-dot.green { background: #28ca42; }

.preview-title {
    margin-left: 12px;
    font-size: 16px;
    color: var(--text-muted);
}

.preview-body {
    padding: 24px;
}

.file-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.file-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px;
    background: var(--dark-surface);
    border-radius: var(--border-radius);
    border: 1px solid var(--dark-border);
    transition: var(--transition);
}

.file-item:hover {
    border-color: var(--primary-blue);
    background: rgba(0, 102, 255, 0.05);
}

.file-icon {
    width:3.6rem;
	height:3.6rem;
	background:#fff;
	border-radius: 10px;
	display:flex;
	justify-content: center;
	align-items: center;
}
.file-icon img {
	width:70%;
}

.file-name {
    flex: 1;
    font-size: 16px;
    color: var(--text-primary);
}

.file-arrow {
    color: var(--primary-blue);
    font-size: 30px;
	font-weight: bold;
}

.file-format {
    padding: 4px 12px;
    background: var(--gradient-blue);
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
}

.features-section {
    padding: 100px 0;
    position: relative;
}

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

.section-title {
    font-size: 42px;
    font-weight: 700;
    margin-bottom: 16px;
    background: linear-gradient(135deg, #ffffff 0%, #0066ff 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.feature-card {
    background: var(--dark-card);
    border-radius: var(--border-radius-lg);
    padding: 32px 24px;
    border: 1px solid var(--dark-border);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

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

.feature-card:hover {
    transform: translateY(-8px);
    border-color: var(--primary-blue);
    box-shadow: var(--shadow-blue);
}

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

.feature-icon {
	height:80px;
    margin-bottom: 30px;
	display: flex;
	justify-content: center;
	align-items: center;
}
.feature-icon img {
	height:100%;
}

.feature-title {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--text-primary);
	text-align: center;
}

.feature-desc {
    font-size: 15px;
    color: var(--text-secondary);
    margin-bottom: 20px;
    line-height: 2.0;
}

.feature-formats {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
}

.format-tag {
    padding: 5px 15px;
    background: rgba(0, 102, 255, 0.1);
    border: 1px solid rgba(0, 102, 255, 0.3);
    border-radius: 20px;
    font-size: 14px;
    color: var(--primary-blue-light);
}

.converter-section {
    padding: 100px 0;
    background: linear-gradient(135deg, 
        rgba(10, 10, 15, 1) 0%, 
        rgba(13, 16, 32, 0.95) 25%, 
        rgba(10, 21, 37, 0.9) 50%, 
        rgba(13, 16, 32, 0.95) 75%, 
        rgba(10, 10, 15, 1) 100%
    );
    border-top: 1px solid rgba(0, 102, 255, 0.1);
    border-bottom: 1px solid rgba(0, 102, 255, 0.1);
}

.converter-layout {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 30px;
    margin-top: 40px;
    align-items: stretch;
}

.converter-tabs {
    display: flex;
    flex-direction: column;
    gap: 12px;
    justify-content: space-between;
}

.tab-btn {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 16px 20px;
    background: var(--dark-card);
    border: 1px solid var(--dark-border);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    text-align: left;
    flex: 1;
    justify-content:center;
	font-size:20px;
}

.tab-btn:hover {
    border-color: var(--primary-blue);
    background: rgba(0, 102, 255, 0.05);
}

.tab-btn.active {
    background: var(--gradient-blue);
    border-color: transparent;
    box-shadow: var(--shadow-blue);
}

.tab-icon {
    width:2.6rem;
	height:2.6rem;
}
.tab-icon img {
	width:100%;
}

.tab-text {
    font-weight: bold;
    color: var(--text-primary);
}

.tab-btn.active .tab-text {
    color: var(--text-primary);
}

.converter-content {
    min-height: 400px;
    display: flex;
    flex-direction: column;
}

.tab-panel {
    display: none;
    flex: 1;
}

.tab-panel.active {
    display: flex;
    flex-direction: column;
    animation: fadeIn 0.3s ease;
}

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

.conversion-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    flex: 1;
    align-content: stretch;
}

.conversion-card {
    background: var(--dark-card);
    border-radius: var(--border-radius);
    padding: 28px 24px;
    border: 1px solid var(--dark-border);
    text-align: center;
    transition: var(--transition);
    cursor: pointer;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.conversion-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-blue);
    box-shadow: var(--shadow-blue);
    background: linear-gradient(135deg, rgba(0, 102, 255, 0.1) 0%, rgba(0, 68, 204, 0.05) 100%);
}

.conversion-card.more {
    background: transparent;
    border: 2px dashed var(--dark-border);
}

.conversion-card.more:hover {
    border-color: var(--primary-blue);
    background: rgba(0, 102, 255, 0.05);
}

.card-icon {
    font-size: 36px;
    margin-bottom: 16px;
	display: flex;
	flex-direction: row;
	gap:20px;
	justify-content: center;
	align-items: center;
}
.card-icon i {
	width:54px;
	height:54px;
	display: block;
}
.card-icon i img {
	width:100%;
}
.card-icon i.arrow {
	width: 15px;  
    height: 15px;  
    border-style: solid;  
    border-width: 1px 1px 0 0;  
    border-color: #ababab;  
    -webkit-transform-origin: 75% 25%;  
    -webkit-transform: rotateZ(45deg);  
    -webkit-transition: 100ms ease-in .1s;  
    transition: 100ms ease-in .1s; 
	margin-top: 8px;
}

.card-title {
    font-size: 18px;
    font-weight: bold;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.card-desc {
    font-size: 16px;
    color: var(--text-muted);
    margin-bottom: 16px;
}

.convert-btn {
    display: inline-flex;
    align-items: center;
    padding: 10px 24px;
    background: transparent;
    border: 1px solid var(--primary-blue);
    color: var(--primary-blue-light);
    border-radius: 25px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
	justify-content: center;
}

.conversion-card:hover .convert-btn {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.5);
    color: var(--text-primary);
}

.advantages-section {
    padding: 100px 0;
    background: linear-gradient(135deg, 
        rgba(10, 10, 15, 1) 0%, 
        rgba(13, 16, 32, 0.9) 25%, 
        rgba(10, 21, 37, 0.8) 50%, 
        rgba(13, 16, 32, 0.9) 75%, 
        rgba(10, 10, 15, 1) 100%
    );
    border-top: 1px solid rgba(0, 102, 255, 0.1);
    border-bottom: 1px solid rgba(0, 102, 255, 0.1);
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 60px;
}

.advantage-card {
    background: var(--dark-card);
    border-radius: var(--border-radius-lg);
    padding: 40px 32px;
    border: 1px solid var(--dark-border);
    text-align: center;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

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

.advantage-card:hover {
    transform: translateY(-8px);
    border-color: var(--primary-blue);
    box-shadow: var(--shadow-blue);
}

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

.advantage-icon {
    margin:0 auto 20px auto;
	width:64px;
	height:64px;
}

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

.advantage-title {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

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

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

.steps-container {
    display: flex;
    align-items: flex-start;
    gap: 40px;
    margin-top: 60px;
    position: relative;
}


.step-item {
    flex: 1;
    background: var(--dark-card);
    border-radius: var(--border-radius-lg);
    padding: 40px 32px;
    border: 1px solid var(--dark-border);
    text-align: center;
    position: relative;
    z-index: 1;
    transition: var(--transition);
}

.step-item:hover {
    transform: translateY(-5px);
    border-color: var(--primary-blue);
    box-shadow: var(--shadow-blue);
}

.step-number {
    position: absolute;
    top: -28px;
    left: 50%;
    transform: translateX(-50%);
    width: 56px;
    height: 56px;
    background: var(--gradient-blue);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 30px;
    font-weight: 700;
    color: var(--text-primary);
    box-shadow: var(--shadow-blue);
}

.step-content {
    margin-top: 20px;
}

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

.step-desc {
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: 20px;
    line-height: 1.6;
}

.step-image {
    width: 100%;
    height: 180px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 10px;
	overflow: hidden;
}
.step-image img {
	width:100%;
	border-radius: 20px;
}

.step-arrow {
    margin-top: 180px;
    z-index: 1;
	width: 30px;  
    height: 30px;  
    border-style: solid;  
    border-width: 2px 2px 0 0;  
    border-color: #B9DBFF;  
    -webkit-transform-origin: 75% 25%;  
    -webkit-transform: rotateZ(45deg);  
    -webkit-transition: 100ms ease-in .1s;  
    transition: 100ms ease-in .1s; 
}

.download-section {
    padding: 120px 0;
    background: linear-gradient(180deg, transparent 0%, rgba(0, 102, 255, 0.05) 50%, transparent 100%);
}

.download-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    margin-top: 60px;
}

.download-card {
    background: var(--dark-card);
    border-radius: var(--border-radius-lg);
    padding: 60px 40px;
    border: 2px solid var(--dark-border);
    text-align: center;
    text-decoration: none;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.download-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-blue);
    opacity: 0;
    transition: var(--transition);
}

.download-card:hover {
    transform: translateY(-12px) scale(1.02);
    border-color: var(--primary-blue);
    box-shadow: 0 20px 60px rgba(0, 102, 255, 0.4);
}

.download-card:hover::before {
    opacity: 0.15;
}

.download-icon {
    margin-bottom: 24px;
    position: relative;
    z-index: 1;
    filter: drop-shadow(0 4px 20px rgba(0, 102, 255, 0.3));
    transition: var(--transition);
	width:80px;
	hegiht:80px;
}
.download-icon img {
	width:100%;
}

.download-card:hover .download-icon {
    transform: scale(1.1);
    filter: drop-shadow(0 8px 30px rgba(0, 102, 255, 0.5));
}

.download-title {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-primary);
    position: relative;
    z-index: 1;
}

.download-desc {
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: 20px;
    position: relative;
    z-index: 1;
}

.download-version {
    display: inline-block;
    padding: 10px 24px;
    background: rgba(0, 102, 255, 0.15);
    border: 2px solid rgba(0, 102, 255, 0.4);
    border-radius: 30px;
    font-size: 15px;
    font-weight: 600;
    color: var(--primary-blue-light);
    position: relative;
    z-index: 1;
    transition: var(--transition);
}

.download-card:hover .download-version {
    background: var(--gradient-blue);
    color: var(--text-primary);
    border-color: transparent;
}

.footer {
    padding: 60px 0 30px;
    border-top: 1px solid var(--dark-border);
    background: rgba(10, 10, 15, 0.5);
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 40px;
    margin-bottom: 40px;
}

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

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

.footer-lang-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 12px;
    max-width: 800px;
    margin: 0 auto;
}

.footer-lang-item {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 8px 16px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--dark-border);
    border-radius: 20px;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    transition: var(--transition);
}

.footer-lang-item:hover {
    background: rgba(0, 102, 255, 0.1);
    border-color: var(--primary-blue);
    color: var(--text-primary);
}

.footer-lang-item.active {
    background: var(--gradient-blue);
    border-color: transparent;
    color: var(--text-primary);
}

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

.footer-brand .logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 16px;
}

.footer-desc {
    color: var(--text-muted);
    font-size: 14px;
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid var(--dark-border);
}

.copyright {
    color: var(--text-muted);
    font-size: 13px;
}

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

@media (max-width: 992px) {
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-buttons {
        justify-content: center;
    }

    .hero-stats {
        justify-content: center;
    }

    .converter-layout {
        grid-template-columns: 1fr;
    }

    .converter-tabs {
        flex-direction: row;
        flex-wrap: wrap;
        justify-content:space-around;
    }

    .tab-btn {
        flex: 0 0 auto;
    }

    .download-cards {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
	.shape {
		width:260px;
		height:260px;
	}
	.shape2 {
		bottom:1%;
	}
    .navbar-menu {
        position: fixed;
        top: 90px;
        left: 0;
        right: 0;
        bottom: 0;
        background: #0d1020 !important;
        flex-direction: column;
        justify-content: flex-start;
        align-items: center;
        padding: 40px 20px;
        gap: 30px;
        transform: translateX(100%);
        transition: var(--transition);
        border-top: 2px solid #0066ff;
        box-shadow: -5px 0 30px rgba(0, 102, 255, 0.3);
        z-index: 9999;
    }

    .navbar-menu.active {
        transform: translateX(0);
		height:100vh;
    }

    .nav-links {
        flex-direction: column;
        align-items: center;
        gap: 20px;
    }

    .nav-links a {
        font-size: 18px;
    }

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

    .navbar-actions {
        flex-direction: column;
        gap: 20px;
        width: 100%;
        align-items: center;
    }

    .language-selector {
        width: 100%;
        display: flex;
        flex-direction: column;
        align-items: center;
    }

    .lang-btn {
        width: 100%;
        max-width: 280px;
        justify-content: center;
    }

    .lang-dropdown {
        position: static;
        width: 100%;
        max-width: 280px;
        margin-top: 10px;
		max-height: 300px;
		overflow: auto;
    }

    .download-btn {
        width: 100%;
        max-width: 280px;
        justify-content: center;
        padding: 14px 28px;
        font-size: 17px;
		display: none;
    }

    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 45px;
        height: 45px;
    }

    .hero-title {
        font-size: 36px;
    }

    .hero-subtitle {
        font-size: 16px;
    }

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

    .btn-primary, .btn-secondary {
        width: 100%;
        max-width: 280px;
        justify-content: center;
    }

    .hero-stats {
        flex-wrap: wrap;
        gap: 30px;
    }

    .section-title {
        font-size: 32px;
    }

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

    .conversion-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

    .download-card {
        padding: 20px 20px;
    }
	
	.logo-icon {
		width:2.4rem;
		height:2.4rem;
	}

    .download-icon {
        width:54px;
		height:54px;
		margin-bottom: 0;
    }
	.download-version {
		padding:5px 20px;
	}

    .download-title {
        font-size: 24px;
    }

    .advantages-grid {
        display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
    }
	
	.advantage-card {
		padding:20px 10px;
	}
	
	.advantage-desc {
		font-size:15px;
	}

    .steps-container {
        flex-direction: column;
        align-items: center;
        gap: 40px;
    }

    .steps-container::before {
        display: none;
    }

    .step-arrow {
        transform: rotate(135deg);
        margin: 20px 0;
    }

    .step-item {
        width: 100%;
        max-width: 400px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

    .hero-title {
        font-size: 28px;
    }

    .hero-stats {
        gap: 20px;
    }

    .stat-number {
        font-size: 28px;
    }

    .section-title {
        font-size: 26px;
    }

    .section-subtitle {
        font-size: 15px;
    }

    .converter-tabs {
        gap: 15px;
    }

    .tab-btn {
        padding: 15px 20px;
		gap:15px;
    }

    .tab-icon {
        font-size: 20px;
    }

    .tab-text {
        font-size: 17px;
    }

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

    .conversion-card {
        padding: 24px 20px;
    }

    .feature-card {
        padding: 24px 20px;
    }
}