/* 鲲穹转换大师 - 样式文件 */

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

:root {
    --primary-color: #5b56a9;
    --secondary-color: #ff6b6b;
    --accent-color: #ff9a9e;
    --dark-color: #2d3561;
    --light-color: #ffffff;
    --text-color: #ffffff;
    --text-secondary: #c7c9e3;
    --border-color: rgba(255, 255, 255, 0.15);
    --card-bg: rgba(255, 255, 255, 0.08);
    --gradient-primary: linear-gradient(135deg, #5b56a9, #ff9a9e);
    --gradient-secondary: linear-gradient(135deg, #667eea, #ff6b6b);
    --gradient-dark: linear-gradient(135deg, #2d3561, #1a1f3a);
    --gradient-avi: linear-gradient(135deg, #ff6b6b, #ee5a24);
    --gradient-gif: linear-gradient(135deg, #feca57, #ff9ff3);
    --gradient-webm: linear-gradient(135deg, #48dbfb, #1dd1a1);
    --gradient-mov: linear-gradient(135deg, #5f27cd, #341f97);
    --gradient-mp4: linear-gradient(135deg, #00d2d3, #54a0ff);
    --gradient-item-1: linear-gradient(135deg, #ff6b6b, #ee5a24);
    --gradient-item-2: linear-gradient(135deg, #feca57, #ff9ff3);
    --gradient-item-3: linear-gradient(135deg, #48dbfb, #1dd1a1);
    --gradient-item-4: linear-gradient(135deg, #5f27cd, #341f97);
    --gradient-item-5: linear-gradient(135deg, #00d2d3, #54a0ff);
    --gradient-item-6: linear-gradient(135deg, #1dd1a1, #10ac84);
    --shadow-primary: 0 4px 20px rgba(91, 86, 169, 0.3);
    --shadow-secondary: 0 8px 30px rgba(255, 106, 107, 0.3);
    --border-radius: 12px;
    --transition: all 0.3s ease;
}

body {
    font-family: 'Segoe UI', 'Microsoft YaHei', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #0d1117, #161b22, #0d1117);
    color: var(--text-color);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
    min-height: 100vh;
}

/* 星空背景 */
.stars {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
}

.star {
    position: absolute;
    width: 2px;
    height: 2px;
    background: white;
    border-radius: 50%;
    animation: twinkle var(--duration) ease-in-out infinite;
    opacity: 0;
}

@keyframes twinkle {
    0%, 100% {
        opacity: 0;
        transform: scale(0.5);
    }
    50% {
        opacity: var(--opacity);
        transform: scale(1);
    }
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    position: relative;
    z-index: 1;
}

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(13, 17, 23, 0.9);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.5);
    padding: 1rem 0;
    transition: var(--transition);
    border-bottom: 1px solid rgba(212, 194, 237, 0.15);
}

/* 移动端菜单展开时导航栏样式 */
.navbar.menu-open {
    background: rgba(13, 17, 23, 0.98);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 1.5rem;
    font-weight: 700;
}

.logo-icon {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: flex;
	width:3.2rem;
	height:3.2rem;
}
.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: flex;
    align-items: center;
    gap: 2rem;
}

.nav-links {
    display: flex;
    gap: 1.5rem;
    list-style: none;
}

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

.nav-links a:hover,
.nav-links a.active {
    color: var(--accent-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;
    gap: 1rem;
}

.language-selector {
    position: relative;
}

.language-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(212, 194, 237, 0.1);
    border: 1px solid rgba(212, 194, 237, 0.2);
    border-radius: var(--border-radius);
    padding: 0.5rem 1rem;
    cursor: pointer;
    transition: var(--transition);
    font-weight: normal;
    color: var(--text-color);
	font-size:16px;
}

.language-btn:hover {
    background: rgba(212, 194, 237, 0.2);
    border-color: var(--accent-color);
}

.language-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: 0.5rem;
    background: rgba(26, 39, 68, 0.95);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-primary);
    padding: 0.5rem 0;
    min-width: 120px;
    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-secondary);
    text-decoration: none;
    transition: var(--transition);
}

.language-option:hover {
    background-color: rgba(212, 194, 237, 0.1);
    color: var(--accent-color);
}

.download-btn {
    font-size: 0.9rem;
    padding: 0.5rem 1.25rem;
    font-weight: normal;
	font-size:16px;
    background: var(--gradient-primary);
    border:none;
    border-radius: 25px;
    color: white;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
    box-shadow: 0 2px 8px rgba(212, 194, 237, 0.3);
}

.download-btn:hover {
    background: var(--gradient-secondary);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(212, 194, 237, 0.4);
}

.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: 28px;
    height: 3px;
    background: var(--accent-color);
    border-radius: 3px;
    transition: var(--transition);
    transform-origin: center;
}

/* 菜单按钮动画效果 */
.mobile-menu-btn.active span:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}

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

.mobile-menu-btn.active span:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
}

/* Hero区域 */
.hero {
    padding: 12rem 0 6rem;
    position: relative;
    overflow: hidden;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 0;
}

.hero-glow {
    position: absolute;
    border-radius: 50%;
    filter: blur(60px);
    animation: glowFloat 8s ease-in-out infinite;
}

.glow-1 {
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(212, 194, 237, 0.6) 0%, transparent 70%);
    top: -200px;
    left: -150px;
    animation-delay: 0s;
}

.glow-2 {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(91, 86, 169, 0.7) 0%, transparent 70%);
    top: 20%;
    right: -150px;
    animation-delay: 2s;
}

.glow-3 {
    width: 450px;
    height: 450px;
    background: radial-gradient(circle, rgba(53, 70, 114, 0.8) 0%, transparent 70%);
    bottom: -150px;
    left: 10%;
    animation-delay: 4s;
}

.glow-4 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(212, 194, 237, 0.5) 0%, transparent 70%);
    top: 50%;
    left: 35%;
    animation-delay: 1s;
}

@keyframes glowFloat {
    0%, 100% {
        transform: translate(0, 0) scale(1);
        opacity: 0.8;
    }
    25% {
        transform: translate(40px, -30px) scale(1.2);
        opacity: 1;
    }
    50% {
        transform: translate(-30px, 40px) scale(0.85);
        opacity: 0.6;
    }
    75% {
        transform: translate(20px, 20px) scale(1.15);
        opacity: 0.9;
    }
}

.hero-content {
    text-align: left;
    max-width: 600px;
    position: relative;
    z-index: 2;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
    margin-bottom: 3rem;
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--light-color);
    border: none;
    padding: 1rem 2.5rem;
    border-radius: var(--border-radius);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    display: inline-block;
    box-shadow: var(--shadow-primary);
    font-size: 1.1rem;
}

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

.btn-secondary {
    background-color: transparent;
    color: var(--accent-color);
    border: 2px solid var(--accent-color);
    padding: 1rem 2.5rem;
    border-radius: var(--border-radius);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    display: inline-block;
    font-size: 1.1rem;
}

.btn-secondary:hover {
    background-color: var(--accent-color);
    color: var(--dark-color);
}

.hero-stats {
    display: flex;
    justify-content: flex-start;
    gap: 4rem;
    flex-wrap: wrap;
}

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

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* 预览窗口 */
.hero-preview {
    position: relative;
    z-index: 2;
}

.preview-window {
    background: rgba(22, 27, 34, 0.9);
    border: 1px solid rgba(212, 194, 237, 0.2);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5), 0 0 40px rgba(212, 194, 237, 0.1);
    animation: windowFloat 6s ease-in-out infinite;
}

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

.preview-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.75rem 1rem;
    background: rgba(13, 17, 23, 0.8);
    border-bottom: 1px solid rgba(212, 194, 237, 0.1);
}

.preview-dots {
    display: flex;
    gap: 0.5rem;
}

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

.dot.red { background: #ff5f56; }
.dot.yellow { background: #ffbd2e; }
.dot.green { background: #27ca40; }

.preview-title {
    flex: 1;
    text-align: center;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.preview-content {
    display: grid;
    grid-template-columns: 180px 1fr;
    min-height: 300px;
}

.preview-sidebar {
    background: rgba(13, 17, 23, 0.6);
    padding: 1rem 0;
    border-right: 1px solid rgba(212, 194, 237, 0.1);
}

.sidebar-item {
    padding: 0.75rem 1.25rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
}

.sidebar-item.active {
    background: linear-gradient(90deg, rgba(212, 194, 237, 0.2), transparent);
    color: var(--accent-color);
    border-left: 3px solid var(--accent-color);
}

.sidebar-item:hover {
    background: rgba(212, 194, 237, 0.1);
    color: var(--text-color);
}

.preview-main {
    padding: 1rem;
}

.preview-toolbar {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid rgba(212, 194, 237, 0.1);
}

.toolbar-btn {
    width: 30px;
    height: 30px;
    background: rgba(212, 194, 237, 0.1);
    border-radius: 6px;
}

.preview-files {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.file-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem;
    background: rgba(212, 194, 237, 0.05);
    border: 1px solid rgba(212, 194, 237, 0.1);
    border-radius: 8px;
    transition: var(--transition);
}

.file-item:hover {
    background: rgba(212, 194, 237, 0.1);
    border-color: rgba(212, 194, 237, 0.2);
}

.file-icon {
    width: 40px;
    height: 40px;
    border-radius: 8px;
}

.video-icon {
    background: linear-gradient(135deg, #ff6b6b, #ee5a24);
}

.image-icon {
    background: linear-gradient(135deg, #74b9ff, #0984e3);
}

.file-info {
    flex: 1;
}

.file-name {
    font-size: 0.9rem;
    color: var(--text-color);
    margin-bottom: 0.25rem;
}

.file-size {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.file-status {
    font-size: 0.8rem;
    color: var(--accent-color);
    background: rgba(212, 194, 237, 0.1);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
}

/* 通用区域样式 */
.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

/* 核心功能区域 */
.features-section {
    padding: 6rem 0;
    position: relative;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.feature-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 2.5rem;
    text-align: center;
    transition: var(--transition);
    backdrop-filter: blur(10px);
}

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

.feature-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);
}
.feature-icon img {
	width:60%;
}

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

.feature-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--text-color);
}

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

.feature-formats {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
}

.format-tag {
    padding: 0.25rem 1rem;
    background: rgba(212, 194, 237, 0.1);
    border: 1px solid rgba(212, 194, 237, 0.2);
    border-radius: 20px;
    font-size: 1rem;
    color: var(--accent-color);
}

/* 工具区域 */
.tool-section {
    padding: 6rem 0;
    position: relative;
}

.tool-section:nth-child(even) {
    background: linear-gradient(135deg, #0d1117, #161b22);
}

.tool-header {
    text-align: center;
    margin-bottom: 3rem;
}

.tool-icon-large {
    width: 100px;
    height: 100px;
    margin: 0 auto 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    border-radius: 50%;
    color: white;
}
.tool-icon-large img {
	width:70%;
}

.tool-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: stretch;
    max-width: 1100px;
    margin: 0 auto;
}

/* 上传区域 */
.upload-area {
    border: 2px dashed var(--accent-color);
    border-radius: var(--border-radius);
    padding: 3rem 2rem;
    text-align: center;
    transition: var(--transition);
    background-color: rgba(212, 194, 237, 0.02);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 350px;
    height: 100%;
}

.upload-area:hover,
.upload-area.drag-over {
    background-color: rgba(212, 194, 237, 0.05);
    border-color: var(--secondary-color);
}

.upload-icon {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 1.5rem;
    transition: var(--transition);
	width:4.5rem;
	hegiht:4.5rem;
}
.upload-icon img {
	width:80%;
}

.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 2rem;
    border-radius: var(--border-radius);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow-primary);
}

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

/* 工具选项 */
.tool-options {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 2rem;
    backdrop-filter: blur(10px);
    display: flex;
    flex-direction: column;
    height: 100%;
}

.tool-options .process-btn {
    margin-top: auto;
}

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

.option-group {
    margin-bottom: 2rem;
}

.option-label {
    display: block;
    font-size: 1rem;
    font-weight: 500;
    margin-bottom: 1rem;
    color: var(--text-color);
}

.format-options {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.format-btn {
    padding: 0.5rem 1rem;
    background: rgba(212, 194, 237, 0.1);
    border: 1px solid rgba(212, 194, 237, 0.2);
    border-radius: 20px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.9rem;
}

.format-btn:hover,
.format-btn.active {
    background: var(--gradient-primary);
    border: none;
    color: white;
}

.quality-options {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.quality-option {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
    color: var(--text-secondary);
    transition: var(--transition);
}

.quality-option:hover {
    color: var(--text-color);
}

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

.process-types {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
}

.process-type {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    background: rgba(212, 194, 237, 0.05);
    border: 1px solid rgba(212, 194, 237, 0.1);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    color: var(--text-secondary);
}

.process-type:hover,
.process-type.active {
    background: rgba(212, 194, 237, 0.15);
    border-color: var(--accent-color);
    color: var(--text-color);
}

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

.checkbox-option {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
}

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

.process-btn {
    width: 100%;
    background: var(--gradient-secondary);
    color: white;
    border: none;
    padding: 1rem 2rem;
    border-radius: var(--border-radius);
    font-weight: 600;
    font-size: 1.1rem;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow-primary);
    margin-top: 1rem;
}

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

/* 视频转换Tab选项卡 */
.video-tabs {
    max-width: 1000px;
    margin: 0 auto;
}

.tab-nav {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.tab-btn {
    padding: 0.75rem 1.5rem;
    background: rgba(91, 86, 169, 0.1);
    border: 1px solid rgba(91, 86, 169, 0.3);
    border-radius: 30px;
    color: var(--text-secondary);
    font-size: 1.2rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.tab-btn:hover {
    background: rgba(91, 86, 169, 0.2);
    border-color: var(--primary-color);
    color: var(--text-color);
}

.tab-btn.active {
    background: var(--gradient-primary);
    border: none;
    color: white;
    box-shadow: var(--shadow-primary);
}

.tab-content {
    display: none;
    animation: fadeIn 0.3s ease;
}

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

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

/* 转换网格 - 两行三列 */
.conversion-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: repeat(2, 1fr);
    gap: 1.5rem;
}

.conversion-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    padding: 2rem 1.5rem;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    transition: var(--transition);
    cursor: pointer;
    text-align: center;
}

.conversion-item:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-primary);
    border-color: var(--accent-color);
}

.item-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    border-radius: 12px;
    color: white;
    flex-shrink: 0;
}
.item-icon img {
	width:80%;
}

/* 视频格式互转图标背景颜色 */
.conversion-grid .conversion-item:nth-child(1) .item-icon {
    background: var(--gradient-item-1);
}

.conversion-grid .conversion-item:nth-child(2) .item-icon {
    background: var(--gradient-item-2);
}

.conversion-grid .conversion-item:nth-child(3) .item-icon {
    background: var(--gradient-item-3);
}

.conversion-grid .conversion-item:nth-child(4) .item-icon {
    background: var(--gradient-item-4);
}

.conversion-grid .conversion-item:nth-child(5) .item-icon {
    background: var(--gradient-item-5);
}

.conversion-grid .conversion-item:nth-child(6) .item-icon {
    background:none;
}

.item-icon svg {
    width: 28px;
    height: 28px;
}

.item-content {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.conversion-item .format-from {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--primary-color);
}

.conversion-item .arrow {
    font-size: 1.2rem;
    color: var(--accent-color);
}

.conversion-item .format-to {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--secondary-color);
}

.convert-btn {
    padding: 0.6rem 1.5rem;
    background: var(--gradient-primary);
    border: none;
    border-radius: 20px;
    color: white;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
    margin-top: 0.5rem;
}

.convert-btn:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-primary);
}

.conversion-item.more {
    background: linear-gradient(135deg, rgba(91, 86, 169, 0.1), rgba(255, 154, 158, 0.1));
    border: 2px dashed var(--accent-color);
    justify-content: center;
}

.conversion-item.more:hover {
    background: linear-gradient(135deg, rgba(91, 86, 169, 0.2), rgba(255, 154, 158, 0.2));
    border-style: solid;
}

.conversion-item.more .item-icon {
    background: linear-gradient(135deg, rgba(91, 86, 169, 0.3), rgba(255, 154, 158, 0.3));
}

.more-text {
    font-size: 1rem;
    font-weight: 600;
    color: var(--accent-color);
}

/* 全能图转 - 左右排版 */
.image-converter-layout {
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: 2rem;
    max-width: 1100px;
    margin: 0 auto;
    align-items: stretch;
}

/* 左侧Tab导航 */
.image-tab-nav {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    height: 100%;
    min-height: 500px;
}

.image-tab-btn {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 1.25rem;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    color: var(--text-secondary);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    text-align: left;
    flex: 1;
	justify-content: center;
}

.image-tab-btn:hover {
    background: rgba(91, 86, 169, 0.1);
    border-color: var(--primary-color);
    color: var(--text-color);
}

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

.image-tab-btn .tab-icon {
    font-size: 1.25rem;
}

.image-tab-btn .tab-text {
    flex: 1;
	text-align: center;
	font-size:1.2rem;
}

/* 右侧内容区域 */
.image-tab-contents {
    min-height: 500px;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.image-tab-content {
    display: none;
    animation: fadeIn 0.3s ease;
    flex: 1;
    height: 100%;
}

.image-tab-content.active {
    display: flex;
    flex-direction: column;
}

.image-tab-content {
    display: none;
    animation: fadeIn 0.3s ease;
}

.image-tab-content.active {
    display: block;
}

/* 九宫格布局 */
.image-conversion-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: repeat(3, 1fr);
    gap: 1.25rem;
    flex: 1;
    height: 100%;
}

.image-conversion-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    padding: 1.5rem 1rem;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    transition: var(--transition);
    cursor: pointer;
    text-align: center;
}

.image-conversion-item:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-primary);
    border-color: var(--accent-color);
}

.image-conversion-item .item-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background:none;
    border-radius: 10px;
    font-size: 1.5rem;
}
.image-conversion-item .item-icon img {
	width:90%;
}

.image-conversion-item .item-content {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
}

.image-conversion-item .format-from {
    font-size: 1rem;
    font-weight: 600;
    color: var(--primary-color);
}

.image-conversion-item .arrow {
    font-size: 1.1rem;
    color: var(--accent-color);
}

.image-conversion-item .format-to {
    font-size: 1rem;
    font-weight: 600;
    color: var(--secondary-color);
}

.image-conversion-item .convert-btn {
    padding: 0.5rem 1.25rem;
    font-size: 0.85rem;
    margin-top: 0.25rem;
}

.image-conversion-item.more {
    background: linear-gradient(135deg, rgba(91, 86, 169, 0.1), rgba(255, 154, 158, 0.1));
    border: 2px dashed var(--accent-color);
    justify-content: center;
}

.image-conversion-item.more:hover {
    background: linear-gradient(135deg, rgba(91, 86, 169, 0.2), rgba(255, 154, 158, 0.2));
    border-style: solid;
}

/*.image-conversion-item.more .item-icon {
    background: linear-gradient(135deg, rgba(91, 86, 169, 0.3), rgba(255, 154, 158, 0.3));
}*/

/* 响应式适配 */
@media (max-width: 992px) {
    .image-converter-layout {
        grid-template-columns: 1fr;
    }
    
    .image-tab-nav {
        flex-direction: row;
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .image-tab-btn {
        flex: 1;
        min-width: 140px;
        justify-content: center;
    }
    
    .image-conversion-grid {
        grid-template-columns: repeat(2, 1fr);
        grid-template-rows: auto;
    }
}

@media (max-width: 576px) {
    .image-conversion-grid {
        grid-template-columns: repeat(2, 1fr);
        grid-template-rows: auto;
    }
    
    .image-tab-btn {
        min-width: calc(50% - 0.5rem);
        flex: none;
		height: auto;
    }
    
    .image-tab-nav {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
		min-height: inherit;
    }
}

/* 文档转换列表 - 两行四列 */
.document-conversion-list {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    grid-template-rows: repeat(2, 1fr);
    gap: 1.5rem;
    max-width: 1100px;
    margin: 0 auto 3rem;
}

.document-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    padding: 2rem 1.5rem;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    transition: var(--transition);
    cursor: pointer;
    text-align: center;
}

.document-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-primary);
    border-color: var(--accent-color);
    background: linear-gradient(135deg, rgba(91, 86, 169, 0.1), rgba(255, 154, 158, 0.1));
}

.document-item .doc-icon {
    width:4.0rem;
	height:4.0rem;
    line-height: 1;
	display: flex;
	justify-content: center;
	align-items: center;
}
.document-item .doc-icon img {
	width:80%;
}

.document-item .doc-name {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-color);
}

/* 文档转换列表响应式 */
@media (max-width: 992px) {
    .document-conversion-list {
        grid-template-columns: repeat(2, 1fr);
        grid-template-rows: repeat(4, 1fr);
    }
}

@media (max-width: 576px) {
    .document-conversion-list {
        grid-template-columns: repeat(2, 1fr);
        grid-template-rows: auto;
    }
    
    .document-item {
        padding: 1.5rem 1rem;
    }
}

/* 下载区域 */
.download-section {
    padding: 6rem 0;
    background: linear-gradient(135deg, #0d1117, #161b22, #0d1117);
    position: relative;
    overflow: hidden;
}

.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: #d4c2ed;
    top: -50px;
    left: 10%;
}

.download-circle-2 {
    width: 150px;
    height: 150px;
    background: #5b56a9;
    top: 50%;
    right: 10%;
    animation-delay: 2s;
}

.download-circle-3 {
    width: 100px;
    height: 100px;
    background: #354672;
    bottom: -30px;
    left: 30%;
    animation-delay: 4s;
}

.download-circle-4 {
    width: 80px;
    height: 80px;
    background: #d4c2ed;
    top: 20%;
    right: 30%;
    animation-delay: 1s;
}

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

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

.download-card {
    display: flex;
	flex-direction: column;
    align-items: center;
    gap: 1.5rem;
    background: var(--card-bg);
    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, 0.2);
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(10px);
}

.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(--accent-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: linear-gradient(135deg, rgba(212, 194, 237, 0.2), rgba(91, 86, 169, 0.2));
    color: var(--accent-color);
    flex-shrink: 0;
    transition: var(--transition);
}
.download-card-icon img {
	width:70%;
}

.download-card:hover .download-card-icon {
    transform: scale(1.1);
    background: var(--gradient-primary);
    color: white;
}

.download-card.windows .download-card-icon {
    background: linear-gradient(135deg, rgba(0, 120, 215, 0.2), rgba(0, 164, 239, 0.2));
    color: #00A4EF;
}

.download-card.windows:hover .download-card-icon {
    background: linear-gradient(135deg, #0078D7, #00A4EF);
    color: white;
}

.download-card.mac .download-card-icon {
    background: linear-gradient(135deg, rgba(0, 122, 255, 0.2), rgba(88, 86, 214, 0.2));
    color: #007AFF;
}

.download-card.mac:hover .download-card-icon {
    background: linear-gradient(135deg, #007AFF, #5856D6);
    color: white;
}

.download-card.linux .download-card-icon {
    background: linear-gradient(135deg, rgba(252, 198, 36, 0.2), rgba(233, 84, 32, 0.2));
    color: #FCC624;
}

.download-card.linux:hover .download-card-icon {
    background: linear-gradient(135deg, #FCC624, #E95420);
    color: white;
}

.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: none;
    padding: 0.25rem 0.75rem;
    background: rgba(212, 194, 237, 0.2);
    color: var(--accent-color);
    border-radius: 12px;
    font-size: 0.85rem;
    font-weight: 600;
}

.download-card-arrow {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: rgba(212, 194, 237, 0.1);
    color: var(--accent-color);
    transition: var(--transition);
    flex-shrink: 0;
}
.download-card-arrow img {
	width:60%;
}

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

/* 页脚 */
.footer {
    background: rgba(5, 10, 18, 0.98);
    border-top: 1px solid rgba(212, 194, 237, 0.15);
    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 2fr;
    gap: 4rem;
    margin-bottom: 3rem;
}

.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: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
    max-width: 400px;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 2rem;
}

.link-group h4 {
    font-size: 1.1rem;
    font-weight: 600;
    color: white;
    margin-bottom: 1.5rem;
    position: relative;
    padding-bottom: 0.5rem;
}

.link-group h4::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 2px;
    background: var(--gradient-primary);
}

.link-group ul {
    list-style: none;
}

.link-group ul li {
    margin-bottom: 0.75rem;
}

.link-group ul li a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.95rem;
    transition: var(--transition);
}

.link-group ul li a:hover {
    color: var(--accent-color);
    padding-left: 5px;
}

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

.copyright {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.social-links {
    display: flex;
    gap: 1.5rem;
}

.social-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: var(--transition);
}

.social-link:hover {
    color: var(--accent-color);
}

/* 回到顶部按钮 */
.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);
}

/* 响应式设计 */
@media (max-width: 992px) {
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-content {
        text-align: center;
        max-width: 800px;
        margin: 0 auto;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .hero-preview {
        display: none;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .tool-content {
        grid-template-columns: 1fr;
    }
    
    .navbar-menu {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        height: 100vh;
        height: 100dvh;
        background: rgba(13, 17, 23, 0.98);
        backdrop-filter: blur(10px);
        flex-direction: column;
        justify-content: flex-start;
        padding: 80px 1rem 1rem;
        gap: 1.5rem;
        border-bottom: 1px solid rgba(212, 194, 237, 0.15);
        z-index: 998;
        overflow-y: auto;
        animation: slideDown 0.3s ease;
    }

    @keyframes slideDown {
        from {
            opacity: 0;
            transform: translateY(-20px);
        }
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }

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

    .navbar-menu .nav-links {
        display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
    }

    .navbar-menu .nav-links li {
     background:rgba(255,255,255,.1);
		border-radius:10px;
    }

    .navbar-menu .nav-links a {
        display: block;
        padding: 0.5rem 0;
        font-size: 1.1rem;
    }

    .navbar-menu .nav-links a::after {
        display: none;
    }

    .navbar-menu .navbar-actions {
        flex-direction: column;
        gap: 1rem;
        margin-top: 1rem;
    }

    .navbar-menu .download-btn {
        width: 100%;
        text-align: center;
    }

    .nav-links {
        flex-direction: column;
        width: 100%;
        text-align: center;
    }

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

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

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

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

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

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

    /* 移动端隐藏底部三个版块 */
    .footer-links {
        display: none;
    }

    .footer-content {
        margin-bottom: 1rem;
    }
}

@media (max-width: 768px) {
	.tab-btn {
		font-size:1.0rem;
	}
	.tool-section {
		padding:1rem 0;
	}
	.language-selector {
		width:100%;
	}
	.language-btn {
		width:100%;
	}
    .hero {
        padding: 10rem 0 4rem;
    }

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

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

    .hero-stats {
        gap: 1.5rem;
    }

    .stat-number {
        font-size: 1.8rem;
    }

    .section-title {
        font-size: 1.8rem;
    }
	.section-subtitle {
		font-size:1.0rem;
	}

    .feature-card {
        padding: 2rem 1.5rem;
    }

    .upload-area {
        padding: 2rem 1rem;
        min-height: 280px;
    }

    .tool-options {
        padding: 1.5rem;
    }

    .process-types {
        grid-template-columns: 1fr;
    }

    .download-cards {
        grid-template-columns: 1fr;
    }
	.image-section,.document-section {
		padding-top:3rem;
		margin-top: 2rem;
	}
	.tool-icon-large {
		width:72px;
		height:72px;
	}
	.download-card {
		flex-direction:row;
		padding:1.2rem;
	}

    /* 移动端视频格式互转 - 一行两个 */
    .conversion-grid {
        grid-template-columns: repeat(2, 1fr);
        grid-template-rows: auto;
    }
}

@media (max-width: 576px) {
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .btn-primary,
    .btn-secondary {
        width: 100%;
        max-width: 300px;
    }

    .format-options {
        justify-content: center;
    }

    .format-btn {
        padding: 0.4rem 0.8rem;
        font-size: 0.85rem;
    }
}