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

:root {
    --primary-color: #06b6d4;
    --primary-dark: #0891b2;
    --secondary-color: #3b82f6;
    --accent-gradient: linear-gradient(135deg, #06b6d4 0%, #3b82f6 100%);
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --border-color: #e2e8f0;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.1);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
}

body {
    font-family:"微软雅黑", 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

html {
    scroll-behavior: smooth;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: var(--radius-md);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    border: none;
    outline: none;
    font-family: inherit;
}

.btn-primary {
    background: var(--accent-gradient);
    color: white;
    box-shadow: 0 4px 15px rgba(6, 182, 212, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(6, 182, 212, 0.5);
}

.btn-outline {
    background: transparent;
    color: #3687F3;
    border: 1px solid var(--border-color);
}

.btn-outline:hover {
    background: var(--bg-tertiary);
    border-color: #3687F3;
}

.btn-large {
    padding: 14px 32px;
    font-size: 16px;
}

.btn-icon {
    width: 20px;
    height: 20px;
}

.section-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 60px 24px;
}

.section-header {
    text-align: center;
    margin-bottom: 48px;
}

.section-tag {
    display: inline-block;
    padding: 6px 16px;
    background: linear-gradient(135deg, rgba(6, 182, 212, 0.1) 0%, rgba(59, 130, 246, 0.1) 100%);
    color: var(--primary-color);
    border-radius: 20px;
    font-size: 16px;
    font-weight: 500;
    margin-bottom: 16px;
}

.section-title {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 16px;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-desc {
    font-size: 16px;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    box-shadow: var(--shadow-sm);
}

.header-container {
    margin: 0 auto;
    padding: 15px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
}

.logo-icon {
    width: 44px;
    height: 44px;
}
.logo-icon img {
	width:100%;
}

.logo-text {
    display: flex;
    flex-direction: column;
}

.logo-title {
    font-size: 20px;
    font-weight: bold;
    color: #0099FF;
}

.logo-subtitle {
    font-size: 10px;
    color: var(--text-muted);
    letter-spacing: 0.5px;
}

.nav {
    display: flex;
    gap: 30px;
}

.nav-link {
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 17px;
    font-weight: 500;
    padding: 8px 16px;
    border-radius: var(--radius-md);
    transition: all 0.2s ease;
}

.nav-link:hover {
    color: var(--primary-color);
    background: rgba(6, 182, 212, 0.08);
}

.nav-link.active {
    color: var(--primary-color);
    background: rgba(6, 182, 212, 0.08);
}

.header-actions {
    display: flex;
    gap: 12px;
    align-items: center;
}

.language-selector {
    position: relative;
}

.language-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 10px 12px;
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 14px;
    color: var(--text-secondary);
    transition: all 0.2s ease;
}

.language-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.language-btn .btn-icon {
    width: 16px;
    height: 16px;
}

.language-btn .dropdown-icon {
    width: 14px;
    height: 14px;
    transition: transform 0.2s ease;
}

.language-selector:hover .dropdown-icon {
    transform: rotate(180deg);
}

.language-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: 8px;
    background: white;
    border-radius: var(--radius-md);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15);
    min-width: 150px;
    max-height: 280px;
    overflow-y: auto;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.25s ease;
    z-index: 1001;
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.language-dropdown::-webkit-scrollbar {
    width: 6px;
}

.language-dropdown::-webkit-scrollbar-track {
    background: transparent;
    border-radius: 3px;
}

.language-dropdown::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, #06b6d4 0%, #3b82f6 100%);
    border-radius: 3px;
}

.language-dropdown::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(180deg, #0891b2 0%, #2563eb 100%);
}

.language-selector:hover .language-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.language-option {
    display: block;
    padding: 12px 18px;
    font-size: 14px;
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.2s ease;
    border-left: 3px solid transparent;
}

.language-option:hover {
    background: linear-gradient(90deg, rgba(6, 182, 212, 0.08) 0%, transparent 100%);
    color: var(--primary-color);
    border-left-color: var(--primary-color);
}

.language-option.active {
    color: var(--primary-color);
    font-weight: 600;
    background: linear-gradient(90deg, rgba(6, 182, 212, 0.12) 0%, transparent 100%);
    border-left-color: var(--primary-color);
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    z-index: 1001;
}

.mobile-menu-btn span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 1px;
    transition: all 0.3s ease;
}

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

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

.mobile-menu-btn.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* 移动端菜单 */
.mobile-menu {
    display: none;
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    bottom: 0;
    height: calc(100vh - 72px);
    background: white;
    padding: 20px;
    overflow-y: auto;
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-20px);
    transition: all 0.3s ease;
}

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

.mobile-nav {
    display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
	margin-bottom: 10px;
}

.mobile-nav-link {
    display: block;
    padding: 12px 15px;
    font-size: 17px;
    font-weight: 500;
    color: var(--text-primary);
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: all 0.2s ease;
}

.mobile-nav-link:hover {
    background: rgba(6, 182, 212, 0.08);
    color: var(--primary-color);
}

.mobile-actions {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.mobile-language {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.mobile-language-label {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
}

.mobile-language-selector {
    position: relative;
}

.mobile-language-btn {
    width: 100%;
    padding: 12px 16px;
    font-size: 15px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: white;
    color: var(--text-primary);
    cursor: pointer;
    outline: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: all 0.2s ease;
}

.mobile-language-btn svg {
    width: 16px;
    height: 16px;
    transition: transform 0.2s ease;
}

.mobile-language-selector.active .mobile-language-btn {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.1);
}

.mobile-language-selector.active .mobile-language-btn svg {
    transform: rotate(180deg);
}

.mobile-language-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    margin-top: 8px;
    background: white;
    border-radius: var(--radius-md);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15);
    max-height: 200px;
    overflow-y: auto;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.25s ease;
    z-index: 100;
    border: 1px solid rgba(0, 0, 0, 0.05);
}

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

.mobile-language-dropdown::-webkit-scrollbar {
    width: 6px;
}

.mobile-language-dropdown::-webkit-scrollbar-track {
    background: transparent;
    border-radius: 3px;
}

.mobile-language-dropdown::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, #06b6d4 0%, #3b82f6 100%);
    border-radius: 3px;
}

.mobile-language-option {
    display: block;
    padding: 12px 16px;
    font-size: 14px;
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.2s ease;
    border-left: 3px solid transparent;
}

.mobile-language-option:hover {
    background: linear-gradient(90deg, rgba(6, 182, 212, 0.08) 0%, transparent 100%);
    color: var(--primary-color);
    border-left-color: var(--primary-color);
}

.mobile-language-option.active {
    color: var(--primary-color);
    font-weight: 600;
    background: linear-gradient(90deg, rgba(6, 182, 212, 0.12) 0%, transparent 100%);
    border-left-color: var(--primary-color);
}

.mobile-buttons {
    display: flex;
    gap: 12px;
}

.mobile-buttons .btn {
    flex: 1;
    justify-content: center;
}

.hero {
    position: relative;
    min-height: 100vh;
    padding: 120px 24px 80px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(180deg, #f0f9ff 0%, #f8fafc 50%, #ffffff 100%);
}

.bg-circle {
    position: absolute;
    border-radius: 50%;
    opacity: 0.5;
}

.circle-1 {
    width: 600px;
    height: 600px;
    background: linear-gradient(135deg, rgba(6, 182, 212, 0.2) 0%, transparent 100%);
    top: -200px;
    right: -100px;
}

.circle-2 {
    width: 400px;
    height: 400px;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.2) 0%, transparent 100%);
    bottom: -100px;
    left: -50px;
}

.circle-3 {
    width: 300px;
    height: 300px;
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.1) 0%, transparent 100%);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.hero-container {
    position: relative;
    z-index: 1;
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
    min-height: calc(100vh - 200px);
}

.hero-content {
    max-width: 600px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: rgba(6, 182, 212, 0.1);
    border-radius: 20px;
    font-size: 16px;
    color: var(--primary-color);
    margin-bottom: 24px;
}

.badge-icon {
    font-size: 14px;
}

.hero-title {
    font-size: 48px;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 20px;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-desc {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 32px;
    line-height: 1.8;
}

.hero-stats {
    display: flex;
    align-items: center;
    gap: 32px;
    margin-bottom: 32px;
    padding: 24px;
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.stat-item {
    flex: 1;
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 28px;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 4px;
}

.stat-label {
    font-size: 16px;
    color: var(--text-secondary);
}

.stat-divider {
    width: 1px;
    height: 40px;
    background: var(--border-color);
}

.hero-actions {
    display: flex;
    gap: 16px;
}

.hero-actions .btn-large {
	font-size:18px;
}

.hero-actions img {
	height:28px;
}

.hero-visual {
    display: flex;
    justify-content: center;
}

.demo-card {
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    width: 100%;
    animation: float 3s ease-in-out infinite;
}

.demo-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    background: var(--bg-tertiary);
}

.window-controls {
    display: flex;
    gap: 8px;
}

.window-controls span {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: #ff5f56;
}

.window-controls span:nth-child(2) {
    background: #ffbd2e;
}

.window-controls span:nth-child(3) {
    background: #27ca40;
}

.demo-title {
    font-size: 16px;
    color: var(--text-secondary);
}

.demo-body {
    padding: 24px;
}

.before-after {
    display: flex;
    align-items: center;
    gap: 24px;
}

.demo-side {
    flex: 1;
}

.demo-label {
    font-size: 18px;
    font-weight: 600;
    color: #3687F3;
    margin-bottom: 12px;
    text-align: center;
}

.demo-image {
    aspect-ratio: 4/3;
    background: linear-gradient(135deg, #e0f2fe 0%, #dbeafe 100%);
    border-radius: var(--radius-md);
    position: relative;
    overflow: hidden;
}
.demo-image img {
	width:100%;
}

.demo-image.clean {
    background: linear-gradient(135deg, #dcfce7 0%, #bbf7d0 100%);
}

.watermark-overlay {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    padding: 12px 24px;
    background: rgba(0, 0, 0, 0.6);
    border-radius: 8px;
    color: white;
    font-size: 14px;
    font-weight: 600;
}

.arrow-icon {
    font-size: 24px;
    color: var(--text-muted);
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-10px);
    }
}

.ai-elimination {
    background: linear-gradient(180deg, #f0f9ff 0%, #e0f2fe 100%);
    padding: 60px 24px;
}

.elimination-container {
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
}

.elimination-title {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 32px;
}

.elimination-tabs {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-bottom: 32px;
}

.tab-item {
    padding: 10px 32px;
    border-radius: 40px;
    font-size: 18px;
    font-weight: 500;
    border: none;
    cursor: pointer;
    transition: all 0.2s ease;
    background: transparent;
    color: var(--text-secondary);
}

.tab-item.active {
    background: #1e293b;
    color: white;
}

.tab-item:hover:not(.active) {
    background: rgba(30, 41, 59, 0.08);
}

.elimination-comparison {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0;
    max-width: 100%;
    margin: 0 auto;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    position: relative;
}

.comparison-container {
    position: relative;
    width: 100%;
    aspect-ratio: 16/9;
    display: none;
}

.comparison-container.tab-content.active {
    display: block;
}

.comparison-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #fef3c7 0%, #fde68a 50%, #fcd34d 100%);
    overflow: hidden;
}

.comparison-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.watermark-left {
    background: linear-gradient(135deg, #dbeafe 0%, #bfdbfe 50%, #93c5fd 100%);
    clip-path: inset(0 50% 0 0);
    z-index: 2;
}

.watermark-right {
    background: linear-gradient(135deg, #dcfce7 0%, #bbf7d0 50%, #86efac 100%);
    z-index: 1;
}

.watermark-pattern {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        repeating-linear-gradient(
            45deg,
            transparent,
            transparent 20px,
            rgba(255, 255, 255, 0.1) 20px,
            rgba(255, 255, 255, 0.1) 40px
        ),
        repeating-linear-gradient(
            -45deg,
            transparent,
            transparent 20px,
            rgba(255, 255, 255, 0.1) 20px,
            rgba(255, 255, 255, 0.1) 40px
        );
}

.watermark-pattern::before {
    content: 'Designed';
    position: absolute;
    top: 20%;
    left: 10%;
    font-size: 14px;
    color: rgba(0, 0, 0, 0.3);
    font-weight: 500;
}

.watermark-pattern::after {
    content: 'Designed';
    position: absolute;
    bottom: 30%;
    right: 15%;
    font-size: 14px;
    color: rgba(0, 0, 0, 0.3);
    font-weight: 500;
}

.comparison-slider {
    position: absolute;
    top: 0;
    left: 50%;
    width: 4px;
    height: 100%;
    cursor: ew-resize;
    z-index: 10;
}

.slider-line {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 2px;
    height: 100%;
    background: white;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.3);
}

.slider-handle {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: rgba(30,41,59,.7);
    border: 1px solid white;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
    cursor: grab;
}

.slider-handle:active {
    cursor: grabbing;
}

.slider-handle:before, .slider-handle:after {
	content:"";
	position: absolute;
    top: 50%;
	margin-top: -2px;
    width: 12px;  
    height: 12px;  
    border-style: solid;  
    border-width: 2px 2px 0 0;  
    border-color: #ffffff;  
    -webkit-transform-origin: 75% 25%;   
    -webkit-transition: 100ms ease-in .1s;  
    transition: 100ms ease-in .1s;
}
.slider-handle:before {
	-webkit-transform: rotateZ(45deg); 
	right:7px;
}
.slider-handle:after {
	-webkit-transform: rotateZ(225deg); 
	left:2px;
}


.how-it-works {
    background: var(--bg-secondary);
    padding: 80px 24px;
}

.steps-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 48px;
}

.step-wrapper {
    position: relative;
    padding-top: 40px;
}

.step-card {
    padding: 40px 32px;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    text-align: center;
    position: relative;
    transition: all 0.3s ease;
    backdrop-filter: blur(3px);
    -webkit-backdrop-filter: blur(3px);
    z-index: 2;
}

.step-card-green {
    background: linear-gradient(135deg, rgba(134, 239, 172, 0.08), rgba(74, 222, 128, 0.04));
}

.step-card-purple {
    background: linear-gradient(135deg, rgba(167, 139, 250, 0.08), rgba(139, 92, 246, 0.04));
}

.step-card-blue {
    background: linear-gradient(135deg, rgba(96, 165, 250, 0.08), rgba(59, 130, 246, 0.04));
}

.step-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.step-number {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, rgba(96, 165, 250, 0.6), rgba(139, 92, 246, 0.5));
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 40px;
    font-weight: 700;
    box-shadow: 0 4px 15px rgba(96, 165, 250, 0.25);
    z-index: 1;
}

.step-icon {
    margin: 20px 0;
	width:100%;
}
.step-icon img {
	width:100%;
	border-radius: 20px;
}

.step-card h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.step-card p {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.8;
}

.features {
    background: linear-gradient(180deg, #fcf8ff 0%, #f9f4ff 50%, #fcf8ff 100%);
    padding: 80px 24px;
    position: relative;
    overflow: hidden;
}

.features::before,
.features::after {
    content: '';
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.6;
}

.features::before {
    width: 450px;
    height: 450px;
    background: radial-gradient(circle, rgba(96, 165, 250, 0.45) 0%, rgba(167, 139, 250, 0.4) 50%, transparent 70%);
    top: -100px;
    left: -100px;
}

.features::after {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(96, 165, 250, 0.4) 0%, rgba(167, 139, 250, 0.45) 50%, transparent 70%);
    bottom: -80px;
    right: -80px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 24px;
    position: relative;
    z-index: 1;
}

.feature-card {
    background: transparent;
    padding: 32px;
    border-radius: var(--radius-lg);
    transition: all 0.3s ease;
    border: none;
    box-shadow: none;
}

.feature-card:hover {
    transform: translateY(-4px);
}

.feature-icon {
    width: 80px;
    height: 80px;
    margin-bottom: 20px;
	background: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);
	border-radius: 50%;
	display: flex;
	justify-content: center;
	align-items: center;
}
.feature-icon img {
	width:70%;
}

.feature-card h3 {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.feature-card p {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.8;
}

.ai-recognition {
    background: linear-gradient(180deg, #f8faff 0%, #f0f4ff 50%, #f8faff 100%);
    padding: 80px 24px;
    position: relative;
    overflow: hidden;
}

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

.recognition-title {
    font-size: 36px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 20px;
}

.recognition-title .gradient-text {
    background: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.recognition-desc {
    font-size: 16px;
    color: var(--text-secondary);
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.8;
}

.recognition-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
}

.recognition-left {
    padding-right: 20px;
}

.recognition-subtitle {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 24px;
}

.recognition-subtitle .gradient-text {
    background: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.recognition-text {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.9;
    margin-bottom: 16px;
}

.text-link {
    color: #3b82f6;
    text-decoration: none;
    font-weight: 500;
}

.text-link:hover {
    text-decoration: underline;
}

.recognition-note {
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 28px;
}

.recognition-btn {
    padding: 14px 36px;
    font-size: 18px;
    font-weight: 600;
    background: linear-gradient(135deg, #3b82f6 0%, #6366f1 100%);
    border-radius: 30px;
    box-shadow: 0 4px 20px rgba(59, 130, 246, 0.4);
}

.recognition-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(59, 130, 246, 0.5);
}

.recognition-right {
    position: relative;
}

.image-comparison {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.comparison-card {
    position: relative;
    background: white;
    border-radius: 16px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.1);
    overflow: hidden;
}

.comparison-card.original {
    transform: rotate(-3deg);
    z-index: 1;
}

.comparison-card.processed {
    transform: rotate(3deg) translateX(40px);
    margin-top: -40px;
    z-index: 2;
}

.card-label {
    position: absolute;
    top: 12px;
    left: 12px;
    padding: 6px 14px;
    background: rgba(0, 0, 0, 0.7);
    color: white;
    font-size: 12px;
    font-weight: 500;
    border-radius: 20px;
    z-index: 3;
}

.comparison-card.processed .card-label {
    left: auto;
    right: 12px;
    background: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);
}

.card-image {
    width: 100%;
    aspect-ratio: 3/2;
}

.card-image img {
    width: 100%;
    height: 100%;
}

.ai-badge {
    position: absolute;
    top: 30%;
    right: -20px;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 15px rgba(59, 130, 246, 0.4);
    z-index: 4;
}

.ai-badge span {
    color: white;
    font-size: 14px;
    font-weight: 700;
}

@media (max-width: 968px) {
    .recognition-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .recognition-left {
        padding-right: 0;
        text-align: center;
        order: 2;
    }
    
    .recognition-right {
        order: 1;
    }
    
    .recognition-title {
        font-size: 28px;
    }
    
    .recognition-subtitle {
        font-size: 24px;
    }
    
    .image-comparison {
        max-width: 500px;
        margin: 0 auto;
    }
    
    .comparison-card.processed {
        transform: rotate(3deg) translateX(20px);
    }
}

.download {
    background: var(--accent-gradient);
    padding: 60px 24px;
}

.download-content {
    margin: 0 auto;
    text-align: center;
}

.download h2 {
    font-size: 32px;
    font-weight: 700;
    color: white;
    margin-bottom: 16px;
}

.download p {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 32px;
}

.download-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: nowrap;
}

.download-buttons .btn-large {
    flex: 1;
    white-space: nowrap;
}

.download .btn-primary {
    background: white;
    color: var(--primary-color);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.download .btn-primary:hover {
    background: rgba(255, 255, 255, 0.95);
}

.download .btn-outline {
    background: transparent;
    color: white;
    border-color: rgba(255, 255, 255, 0.5);
}
.download .btn {
	font-size:20px;
}
.download .btn img {
	width:56px;
}

.download .btn-outline:hover {
    background: rgba(255, 255, 255, 0.1);
}

.footer {
    background: var(--bg-secondary);
    padding: 40px 24px 20px 24px;
}

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

.footer-main {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 40px;
    padding-bottom: 32px;
    border-bottom: 1px solid var(--border-color);
}

.footer-brand {
    max-width: 300px;
}

.footer-brand .logo {
    margin-bottom: 16px;
}

.footer-brand p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
}

.footer-links {
    display: flex;
    gap: 60px;
}

.footer-column h4 {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.footer-column ul {
    list-style: none;
}

.footer-column li {
    margin-bottom: 12px;
}

.footer-column a {
    text-decoration: none;
    font-size: 14px;
    color: var(--text-secondary);
    transition: color 0.2s ease;
}

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

.footer-bottom {
    padding-top: 24px;
    text-align: center;
}

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

.footer-language {
    padding-bottom: 24px;
    margin-bottom: 24px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
}

.language-label {
    font-size: 15px;
    color: var(--text-muted);
}

.language-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.language-list.expanded {
    max-height: 500px;
}

.language-item {
    padding: 6px 12px;
    font-size: 15px;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius-sm);
    transition: all 0.2s ease;
}

.language-item:hover {
    background: var(--bg-tertiary);
    color: var(--primary-color);
}

.language-item.active {
    background: var(--accent-gradient);
    color: white;
}

.language-toggle-btn {
    display: none;
    align-items: center;
    gap: 4px;
    padding: 6px 16px;
    font-size: 13px;
    color: var(--primary-color);
    background: transparent;
    border: 1px solid var(--primary-color);
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.language-toggle-btn:hover {
    background: rgba(6, 182, 212, 0.1);
}

.language-toggle-btn svg {
    width: 14px;
    height: 14px;
    transition: transform 0.3s ease;
}

.language-toggle-btn.expanded svg {
    transform: rotate(180deg);
}

@media (max-width: 968px) {
    .language-toggle-btn {
        display: flex;
    }
}

/* 返回顶部按钮 - 放在文件最后确保优先级 */
#backToTop {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #06b6d4 0%, #3b82f6 100%);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 15px rgba(6, 182, 212, 0.4);
    z-index: 9999;
    transition: all 0.3s ease;
}
#backToTop img {
	width:70%;
}

#backToTop.show {
    display: flex;
}

#backToTop:hover {
    transform: translateY(-4px);
    box-shadow: 0 6px 20px rgba(6, 182, 212, 0.5);
}

#backToTop svg {
    width: 24px;
    height: 24px;
    color: white;
}

@media (max-width: 968px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 32px;
    }
    
    .hero-title {
        font-size: 36px;
    }
    
    .stat-divider {
        width: 100%;
        height: 1px;
    }
    
    .hero-actions {
        justify-content: center;
        flex-wrap: wrap;
    }
    
    .nav {
        display: none;
    }
    
    .header-actions {
        display: none;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .mobile-menu {
        display: block;
		border-top:1px solid #eee;
    }
}

@media (max-width: 640px) {
	.header-container {
		padding:12px 15px;
		height:70px;
	}
	
	.hero-stats {
		padding:20px 10px;
		gap:10px;
	}
	
	.stat-number {
		font-size:20px;
	}
	
	.stat-label {
		font-size:12px;
	}
	
	.stat-divider {
		display:none;
	}
	
	.tab-item {
		padding:10px 20px;
	}
	
	.language-list {
		max-height:80px;
	}
	
	.footer-links {
		display:none;
	}
	.footer-brand {
		max-width:100%;
		width:100%;
		display: flex;
		justify-content: center;
		align-items: center;
		flex-direction: column;
	}
	.footer-language {
		margin-bottom:15px;
		padding-bottom: 15px;
	}
    .hero-title {
        font-size: 28px;
    }
    
    .hero-desc {
        font-size: 16px;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .before-after {
        flex-direction: column;
        gap: 16px;
    }
	.footer-brand .logo {
		margin-bottom:10px;
	}
	.footer-main {
		padding-bottom: 15px;
	}
	#backToTop {
		right:10px;
	}
    
    .arrow-icon {
        transform: rotate(90deg);
    }
	
	.how-it-works, .features, .ai-recognition, .download {
		padding:40px 0px;
	}
	
	.section-container {
		max-width:100%;
		padding:20px 24px;
	}
    
    .features-grid {
        display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
    }
	.feature-card {
		padding:0;
		display: flex;
		flex-direction: column;
		align-items: center;
	}
	
	.feature-icon {
		width:64px;
		height:64px;
	}
	.feature-card h3 {
		font-size:19px;
	}
	.feature-card p {
		font-size:15px;
	}
    
    .download-buttons {
        flex-wrap: wrap;
    }
    
    .download-buttons .btn-large {
        max-width: 100%;
    }
    
    .footer-links {
        flex-direction: column;
        gap: 32px;
    }
}