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

:root {
    --primary-gradient: linear-gradient(135deg, #b9ecff 0%, #919beb 50%, #b172f4 100%);
    --primary-color: #919beb;
    --secondary-color: #b172f4;
    --tertiary-color: #b9ecff;
    --light-bg: #f5f8ff;
    --dark-text: #2d3748;
    --gray-text: #718096;
    --white: #ffffff;
    --shadow: 0 10px 40px rgba(145, 155, 235, 0.2);
    --shadow-hover: 0 15px 50px rgba(145, 155, 235, 0.3);
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--dark-text);
    background-color: var(--white);
}

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

.navbar {
    background:rgba(255,255,255, .5);
    box-shadow: 0 2px 20px rgba(102, 126, 234, 0.1);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    transition: all 0.3s ease;
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.95);
    box-shadow: 0 4px 30px rgba(102, 126, 234, 0.15);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.2rem 2.5rem;
	max-width: inherit;
}

.logo {
    display: flex;
    align-items: center;
    font-size: 1.5rem;
    font-weight: bold;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo i {
    margin-right: 10px;
    width: 3.6rem;
	height:3.6rem;
}
.logo i img {
	width:100%;
}

.navtop {
	display:flex;
	gap:1rem;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 30px;
	font-size:1.1rem;
}

.nav-links a {
    text-decoration: none;
    color: var(--dark-text);
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
    padding: 5px 0;
}

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

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

.nav-links a.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--primary-gradient);
    border-radius: 2px;
}

.nav-links a:not(.btn-primary)::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-gradient);
    border-radius: 2px;
    transition: width 0.3s ease;
}

.nav-links a:not(.btn-primary):hover::before {
    width: 100%;
}

.top-primary {
    background: var(--primary-gradient);
    color: var(--white);
    padding: 0.5rem 2rem;
    border-radius: 50px;
    text-decoration: none;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    border: none;
    cursor: pointer;
    font-size: 1.1rem;
}
.top-primary a {
	color:#fff;
	text-decoration: none;
	font-weight: normal;
}

.top-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
    color: var(--white);
}
.top-primary a {}

.btn-primary {
    background: var(--primary-gradient);
    color: var(--white);
    padding: 12px 28px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

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

.btn-secondary {
    background: var(--white);
    color: var(--primary-color);
    padding: 12px 28px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    border: 2px solid var(--primary-color);
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn-secondary:hover {
    background: var(--primary-gradient);
    color: var(--white);
    border-color: transparent;
    transform: translateY(-3px);
    box-shadow: var(--shadow);
}

.btn-full {
    width: 100%;
    justify-content: center;
	font-size:1.3rem;
	padding: 1rem 0;
}

.language-selector {
    position: relative;
}

.language-btn {
    background: linear-gradient(135deg, rgba(185, 236, 255, 0.3) 0%, rgba(145, 155, 235, 0.2) 50%, rgba(177, 114, 244, 0.15) 100%);
    border: 1px solid rgba(145, 155, 235, 0.3);
    border-radius: 50px;
    padding: 0.5rem 1.2rem;
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    transition: all 0.3s ease;
    color: var(--dark-text);
    font-size: 1.1rem;
	font-weight: normal;
}

.language-btn:hover {
    background: linear-gradient(135deg, rgba(185, 236, 255, 0.5) 0%, rgba(145, 155, 235, 0.35) 50%, rgba(177, 114, 244, 0.25) 100%);
    border-color: rgba(145, 155, 235, 0.5);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(145, 155, 235, 0.3);
}

.language-btn:active {
    transform: translateY(0);
}

.language-icon {
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}
.fa-globe {
	width: 100%;
	height:100%;
	background:url(../images/golab.png) no-repeat center;
	background-size:100% auto; 
}

.language-text {
    color: var(--dark-text);
    white-space: nowrap;
}

.language-arrow {
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.3s ease;
    color: var(--primary-color);
	width:20px;
	height:20px;
}

.language-selector.active .language-arrow {
    transform: rotate(90deg);
}
.fa-chevron-down {
	width: 10px;  
    height: 10px;  
    border-style: solid;  
    border-width: 1px 1px 0 0;  
    border-color: #3294D6;  
    -webkit-transform-origin: 75% 25%;  
    -webkit-transform: rotateZ(45deg);  
    -webkit-transition: 100ms ease-in .1s;  
    transition: 100ms ease-in .1s; 
	margin-top:8px;
}

.language-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    background: var(--white);
    border-radius: 16px;
    box-shadow: 0 10px 40px rgba(145, 155, 235, 0.25);
    padding: 12px;
    margin-top: 10px;
    min-width: 180px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 1001;
    max-height: 320px;
    overflow-y: auto;
    border: 1px solid rgba(145, 155, 235, 0.15);
}

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

.language-option {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.25s ease;
    margin-bottom: 4px;
}

.language-option:last-child {
    margin-bottom: 0;
}

.language-option:hover {
    background: linear-gradient(135deg, rgba(185, 236, 255, 0.4) 0%, rgba(145, 155, 235, 0.25) 100%);
    transform: translateX(4px);
}

.language-option:active {
    transform: translateX(2px);
}

.lang-flag {
    font-size: 1.3rem;
    line-height: 1;
}

.lang-name {
    font-size: 0.95rem;
    color: var(--dark-text);
    font-weight: 500;
}

.language-option:hover .lang-name {
    color: var(--primary-color);
}

/* 语言下拉框滚动条美化 */
.language-dropdown::-webkit-scrollbar {
    width: 6px;
}

.language-dropdown::-webkit-scrollbar-track {
    background: transparent;
    margin: 8px 0;
}

.language-dropdown::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, rgba(145, 155, 235, 0.4) 0%, rgba(177, 114, 244, 0.4) 100%);
    border-radius: 10px;
    border: 2px solid transparent;
    background-clip: padding-box;
}

.language-dropdown::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(180deg, rgba(145, 155, 235, 0.6) 0%, rgba(177, 114, 244, 0.6) 100%);
    border: 1px solid transparent;
    background-clip: padding-box;
}

/* Firefox 滚动条样式 */
.language-dropdown {
    scrollbar-width: thin;
    scrollbar-color: rgba(145, 155, 235, 0.5) transparent;
}

.mobile-menu {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--dark-text);
}

.hero {
    background: var(--primary-gradient);
    padding: 140px 0 100px;
    position: relative;
    overflow: hidden;
	height:80vh;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-content h1 {
    font-size: 3.2rem;
    font-weight: 800;
    margin-bottom: 25px;
    color: var(--white);
    line-height: 1.2;
}

.hero-content p {
    font-size: 1.2rem;
    margin-bottom: 35px;
    color: rgba(255, 255, 255, 0.9);
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.hero-primary {
    background:#fff;
    color: #3294D6;
    padding:1rem 2.5rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: bold;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 8px;
	font-size:1.2rem;
}
.hero-primary:hover {
    background: linear-gradient(135deg, #3498db, #33A2FF);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(93, 173, 226, 0.4);
    color: #fff;
}
.hero-primary i {
	width:2rem;
	height:2rem;
}
.hero-primary i img {
	width:100%;
}

.hero-secondary {
    background: none;
    color: #33A2FF;
    padding:1rem 2.5rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: bold;
    border: 2px solid #fff;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 8px;
	font-size:1.2rem;
	color: #fff;
}

.hero-secondary:hover {
    background: #fff;
    color: #3294D6;
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(93, 173, 226, 0.4);
}



.hero-image {
    position: relative;
	width:660px;
}

.carousel {
    position: relative;
    width: 100%;
    overflow: hidden;
}

.carousel-slides {
    position: relative;
    width: 100%;
    height: 100%;
}

.carousel-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.8s ease, visibility 0.8s ease;
}

.carousel-slide.active {
    position: relative;
    opacity: 1;
    visibility: visible;
}

.carousel-slide img {
    width: 100%;
    display: block;
}

.carousel-indicators {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
    z-index: 10;
}

.indicator {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    cursor: pointer;
    transition: all 0.3s ease;
}

.indicator:hover {
    background: rgba(255, 255, 255, 0.8);
}

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

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

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 15px;
    color: var(--dark-text);
}

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

.features {
    padding: 100px 0;
    background: var(--light-bg);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.feature-item {
    background: var(--white);
    padding: 40px 30px;
    border-radius: 20px;
    text-align: center;
    transition: all 0.3s ease;
    border: 1px solid rgba(102, 126, 234, 0.1);
}

.feature-item:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
    border-color: transparent;
}

.feature-icon {
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 25px;
    color: var(--white);
    font-size: 2rem;
    transition: all 0.3s ease;
}
.feature-icon img {
	width:100%;
}

.feature-item:hover .feature-icon {
    transform: scale(1.1) rotate(5deg);
}

.feature-item h3 {
    font-size: 1.4rem;
    margin-bottom: 12px;
    color: var(--dark-text);
}

.feature-item p {
    color: var(--gray-text);
    font-size: 1.0rem;
}

.pdf-tools {
    padding: 100px 0;
    background: var(--white);
}

.tools-container {
    display: grid;
    grid-template-columns: 1fr 1.5fr 1fr;
    gap: 15px;
    align-items: stretch;
}

/* 移动端工具tab - 默认隐藏 */
.mobile-tools-tabs {
    display: none;
}

.tools-tabs-left,
.tools-tabs-right {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.tool-tab {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 15px 20px;
    background: var(--white);
    border-radius: 15px;
    cursor: pointer;
    transition: all 0.3s ease;
    flex: 1;
}

.tool-tab:hover {
    box-shadow: var(--shadow);
    transform: translateY(-3px);
}

.tool-tab.active {
    background: linear-gradient(135deg, rgba(185, 236, 255, 0.1) 0%, rgba(145, 155, 235, 0.1) 50%, rgba(177, 114, 244, 0.1) 100%);
}

.tool-tab-icon {
    width: 72px;
    height: 72px;
    background: linear-gradient(135deg, rgba(185, 236, 255, .8) 0%, rgba(145, 155, 235, .8) 50%, rgba(177, 114, 244, .8) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.3rem;
    flex-shrink: 0;
}
.tool-tab-icon img {
	width:60%;
}
.tool-tab.active .tool-tab-icon {
	background: linear-gradient(135deg, rgba(52, 188, 245, 1) 0%, rgba(145, 155, 235, 1) 50%, rgba(134, 67, 219, 1) 100%);
}

.tool-tab-content h4 {
    font-size: 1.4rem;
    color: var(--dark-text);
    margin-bottom: 5px;
}

.tool-tab-content p {
    font-size: 1.0rem;
    color: var(--gray-text);
    margin: 0;
}

.tools-preview {
    position: relative;
    background: var(--white);
    border-radius: 20px;
    padding: 30px;
    box-shadow: var(--shadow);
    min-height: 420px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.tool-preview {
    display: none;
    animation: fadeIn 0.5s ease;
}

.tool-preview.active {
    display: block;
}

.tool-preview img {
    width: 100%;
    border-radius: 15px;
    margin-bottom: 20px;
}

.preview-info {
    text-align: center;
}

.preview-info h4 {
    font-size: 1.4rem;
    color: var(--dark-text);
    margin-bottom: 10px;
}

.preview-info p {
    font-size: 1.1rem;
    color: var(--gray-text);
    margin: 0;
}

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

.software-intro {
    padding: 100px 0;
    /*background: linear-gradient(135deg, rgba(185, 236, 255, 0.3) 0%, rgba(145, 155, 235, 0.2) 50%, rgba(177, 114, 244, 0.1) 100%);*/
	background:url(../images/case_bg.jpg) no-repeat center;
	background-size:cover;
}

.advantages-list {
    display: flex;
    flex-direction: column;
    gap: 60px;
}

.advantage-card {
    display: flex;
    align-items: center;
    gap: 60px;
    transition: all 0.3s ease;
	justify-content: space-between;
}

.advantage-card:hover {
    transform: translateX(10px);
}

.advantage-card-reverse:hover {
    transform: translateX(-10px);
}

.advantage-image {
    flex-shrink: 0;
    width: 540px;
	height: 400px;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow);
}

.advantage-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

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

.advantage-content {
	display: flex;
	flex-direction: column;
    flex: 1;
    max-width: 500px;
	gap:2rem;
}

.advantage-title {
    display: flex;
    align-items: center;
    gap: 15px;
}

.advantage-icon {
    width: 72px;
    height: 72px;
    background: var(--primary-gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.3rem;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}
.advantage-icon img {
	width:50%;
}

.advantage-content h3 {
    font-size: 1.8rem;
    margin: 0;
    color: var(--dark-text);
    font-weight: 700;
}

.advantage-content p {
    color: var(--gray-text);
    line-height:2.2rem;
    font-size: 1.1rem;
    margin: 0;
}

.why-choose-us {
    padding: 100px 0;
    background: var(--white);
}

.why-choose-container {
    max-width: 1000px;
    margin: 0 auto;
}

.why-choose-tabs {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 50px;
    flex-wrap: wrap;
}

.why-tab {
    padding: 15px 30px;
    background: var(--light-bg);
    border-radius: 30px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 500;
    color: var(--dark-text);
    white-space: nowrap;
	font-size:1.2rem;
}

.why-tab:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.why-tab.active {
    background: var(--primary-gradient);
    color: var(--white);
    border-color: transparent;
    box-shadow: var(--shadow);
	font-weight: bold;
}

.why-choose-content {
    position: relative;
}

.why-content-item {
    display: none;
    grid-template-columns: 1.2fr 1fr;
    gap: 50px;
    align-items: center;
    animation: fadeIn 0.5s ease;
}

.why-content-item.active {
    display: grid;
}

.why-content-left {
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow);
}

.why-content-left img {
    width: 100%;
    display: block;
}

.why-content-right {
    padding: 20px;
}

.why-icon {
    width: 72px;
    height: 72px;
    background: var(--primary-gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.5rem;
    margin-bottom: 20px;
}

.why-content-right h3 {
    font-size: 1.8rem;
    color: var(--dark-text);
    margin-bottom: 15px;
    font-weight: 700;
}

.why-content-right p {
    font-size: 1.1rem;
    color: var(--gray-text);
    line-height: 2.1;
    margin: 0;
}

.online-convert {
    padding: 100px 0;
    background: var(--white);
}

.online-convert-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.convert-form {
    background: var(--white);
    padding: 40px;
    border-radius: 20px;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
}

.convert-form:hover {
    box-shadow: var(--shadow-hover);
}

.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--dark-text);
    font-size: 1rem;
}

.file-upload-area {
    border: 2px dashed var(--primary-color);
    border-radius: 15px;
    padding: 40px;
    text-align: center;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    background: var(--light-bg);
	min-height: 170px;
	display:flex;
	align-items: center;
}

.file-upload-area:hover {
    border-color: var(--secondary-color);
    background: rgba(102, 126, 234, 0.05);
}

#file-upload {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
    z-index: 10;
}

.upload-icon {
    font-size: 3rem;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 15px;
}

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

.file-upload-area p {
    color: var(--gray-text);
    font-size: 0.95rem;
}

.file-list {
    margin-top: 20px;
    text-align: start;
}

.file-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 15px;
    background: var(--light-bg);
    border-radius: 8px;
    margin-bottom: 10px;
    font-size: 0.9rem;
}

.file-item i {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-inline-end: 10px;
}

.file-item .file-name {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.file-item .file-size {
    color: var(--gray-text);
    margin-inline-start: 10px;
}

select {
    width: 100%;
    padding: 15px;
    border: 2px solid rgba(102, 126, 234, 0.2);
    border-radius: 10px;
    font-size: 1rem;
    background: var(--light-bg);
    transition: all 0.3s ease;
    cursor: pointer;
}

select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.conversion-result {
    margin-top: 25px;
    text-align: center;
}

.loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 30px;
    background: var(--light-bg);
    border-radius: 15px;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid rgba(102, 126, 234, 0.2);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 15px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.result {
    padding: 30px;
    background: var(--light-bg);
    border-radius: 15px;
    text-align: center;
}

.result-icon {
    width: 70px;
    height: 70px;
    background: var(--primary-gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    color: var(--white);
    font-size: 2rem;
}

.result h3 {
    margin-bottom: 20px;
    color: var(--dark-text);
}

#download-link {
    display: inline-block;
    margin-top: 10px;
}

.convert-steps {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.step {
    display: flex;
    flex-direction: column;
    gap: 12px;
    background: var(--white);
    padding: 25px;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(102, 126, 234, 0.1);
    transition: all 0.3s ease;
}

.step:hover {
    transform: translateX(10px);
    box-shadow: var(--shadow);
}

.step-header {
    display: flex;
    align-items: center;
    gap: 15px;
}

.step-number {
    width: 45px;
    height: 45px;
    background: var(--primary-gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-weight: bold;
    font-size: 1.2rem;
    flex-shrink: 0;
}

.step h3 {
    font-size: 1.6rem;
    margin: 0;
    color: var(--dark-text);
}

.step p {
    color: var(--gray-text);
    margin: 0;
    padding-inline-start: 60px;
    font-size: 1.1rem;
}

.step-arrow {
    display: flex;
    justify-content: center;
    color: var(--primary-color);
    font-size: 1.3rem;
}

.fa-arrow-down {
	width: 16px;  
    height: 16px;  
    border-style: solid;  
    border-width: 1px 1px 0 0;  
    border-color: #ababab;  
    -webkit-transform-origin: 75% 25%;  
    -webkit-transform: rotateZ(135deg);  
    -webkit-transition: 100ms ease-in .1s;  
    transition: 100ms ease-in .1s;
}

.testimonials {
    padding: 100px 0;
    background:url(../images/case_bg.jpg) no-repeat center;
	background-size:cover;
}

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

.testimonials-header h2 {
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--dark-text);
}

.testimonials-carousel {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
}

.testimonials-wrapper {
    position: relative;
    overflow: hidden;
}

.testimonial-item {
    display: none;
    text-align: center;
    padding: 0 60px;
    animation: fadeIn 0.5s ease;
}

.testimonial-item.active {
    display: block;
}

.testimonial-avatar {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    border-radius: 50%;
    overflow: hidden;
    box-shadow: var(--shadow);
}

.testimonial-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.testimonial-role {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--dark-text);
    margin-bottom: 20px;
}

.testimonial-text {
    font-size: 1.1rem;
    color: var(--gray-text);
    line-height: 1.8;
    max-width: 700px;
    margin: 0 auto;
}

.testimonial-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--light-bg);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gray-text);
    font-size: 1.2rem;
    transition: all 0.3s ease;
    z-index: 10;
}

.testimonial-nav:hover {
    background: var(--primary-gradient);
    color: var(--white);
    box-shadow: var(--shadow);
}

.testimonial-nav.prev {
    left: 0;
}

.testimonial-nav.next {
    right: 0;
}

.fa-chevron-left, .fa-chevron-right {
	width: 16px;  
    height: 16px;  
    border-style: solid;  
    border-width: 2px 2px 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:7px;
}
.fa-chevron-left {
	-webkit-transform: rotateZ(225deg);
	margin-right:10px;
}

.testimonial-dots {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 40px;
}

.testimonial-nav:hover .fa-chevron-left {
	border-color: #fff;  
}
.testimonial-nav:hover .fa-chevron-right {
	border-color: #fff;  
}

.testimonial-dots .dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: #ddd;
    cursor: pointer;
    transition: all 0.3s ease;
}

.testimonial-dots .dot:hover {
    background: var(--primary-color);
}

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

.download {
    padding: 100px 0;
    background: var(--primary-gradient);
    position: relative;
    overflow: hidden;
}

.download::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.download-wrapper {
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    z-index: 1;
}

.download-content {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.download-content h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 15px;
    color: var(--white);
}

.download-content > p {
    font-size: 1.2rem;
    margin-bottom: 40px;
    color: rgba(255, 255, 255, 0.9);
}

.download-buttons {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
    margin-bottom: 40px;
    justify-content: center;
}

.download-image {
    display: flex;
    align-items: center;
    justify-content: center;
}

.download-image img {
    width: 100%;
    max-width: 500px;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.2);
}

.btn-download {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 18px 40px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1.3rem;
    transition: all 0.3s ease;
    background: transparent;
    color: var(--white);
    border: 2px solid var(--white);
}

.btn-download:hover {
    background: var(--white);
    color: var(--primary-color);
    transform: translateY(-5px);
}

.fa-windows,.fa-apple,.fa-linux {
	width:3.6rem;
	height:3.6rem;
}
.fa-windows {
	background:url(../images/windows.png) no-repeat center;
	background-size:100% auto; 
}
.fa-apple {
	background:url(../images/apple.png) no-repeat center;
	background-size:100% auto; 
}
.fa-linux {
	background:url(../images/linux.png) no-repeat center;
	background-size:100% auto; 
}

.btn-download:hover .fa-windows {
	background:url(../images/windows_s.png) no-repeat center;
	background-size:100% auto; 
}
.btn-download:hover .fa-apple {
	background:url(../images/apple_s.png) no-repeat center;
	background-size:100% auto; 
}
.btn-download:hover .fa-linux {
	background:url(../images/linux_s.png) no-repeat center;
	background-size:100% auto; 
}

.download-info {
    display: flex;
    flex-direction: column;
    gap: 10px;
    align-items: center;
    font-size: 0.95rem;
    color: rgba(255, 255, 255, 0.8);
}

.download-info p {
    display: flex;
    align-items: center;
    gap: 10px;
    margin: 0;
	font-size:1.1rem;
}

.footer {
    background: #1a1a2e;
    color: #ecf0f1;
    padding: 80px 0 40px;
}

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

.footer-brand {
    margin-bottom: 50px;
}

.footer-brand .logo {
    justify-content: center;
    margin-bottom: 15px;
}

.footer-brand p {
    color: #bdc3c7;
    margin-bottom: 20px;
    max-width: 400px;
}

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

.footer-languages {
    width: 100%;
    max-width: 900px;
}

.footer-languages h3 {
    font-size: 1.2rem;
    margin-bottom: 25px;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.languages-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px 20px;
}

.lang-item {
    background: rgba(255, 255, 255, 0.1);
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 0.9rem;
    color: #bdc3c7;
    transition: all 0.3s ease;
}

.lang-item:hover {
    background: var(--primary-gradient);
    color: var(--white);
    transform: translateY(-2px);
}

.social-links {
    display: flex;
    gap: 15px;
    margin-top: 20px;
}

.social-links a {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #ecf0f1;
    transition: all 0.3s ease;
}

.social-links a:hover {
    background: var(--primary-gradient);
    transform: translateY(-3px);
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: 1.25rem 2rem;
    margin-bottom: 1.5rem;
    font-size: 0.95rem;
}

.footer-links a {
    color: #ecf0f1;
    text-decoration: none;
    transition: color 0.2s ease, opacity 0.2s ease;
}

.footer-links a:hover {
    color: #fff;
    opacity: 0.95;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 30px;
    text-align: center;
    color: #bdc3c7;
    font-size: 0.9rem;
}

.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--primary-gradient);
    color: var(--white);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 999;
}

.back-to-top img {
	width:70%;
}

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

/* 移动端汉堡菜单按钮 */
.mobile-menu-toggle {
    display: none;
    width: 30px;
    height: 24px;
    position: relative;
    cursor: pointer;
    z-index: 1002;
}

.hamburger-line {
    display: block;
    position: absolute;
    width: 100%;
    height: 3px;
    background: #417FE5;
    border-radius: 3px;
    transition: all 0.3s ease;
}

.hamburger-line:nth-child(1) {
    top: 0;
}

.hamburger-line:nth-child(2) {
    top: 50%;
    transform: translateY(-50%);
}

.hamburger-line:nth-child(3) {
    bottom: 0;
}

/* 汉堡菜单展开状态 - 变成叉 */
.mobile-menu-toggle.active .hamburger-line:nth-child(1) {
    top: 50%;
    transform: translateY(-50%) rotate(45deg);
}

.mobile-menu-toggle.active .hamburger-line:nth-child(2) {
    opacity: 0;
}

.mobile-menu-toggle.active .hamburger-line:nth-child(3) {
    bottom: 50%;
    transform: translateY(50%) rotate(-45deg);
}

/* 移动端导航遮罩层 */
.mobile-nav-overlay {
    position: fixed;
    top: 5.6rem;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 998;
}

.mobile-nav-overlay.active {
    opacity: 1;
    visibility: visible;
}

/* 移动端导航菜单 */
.mobile-nav-menu {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    background: var(--white);
    padding: 20px;
    transform: translateY(-100%);
    transition: transform 0.3s ease;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
    display: flex;
    flex-direction: column;
    max-height: calc(100vh - 70px);
    overflow-y: auto;
}

.mobile-nav-overlay.active .mobile-nav-menu {
    transform: translateY(0);
}

.mobile-nav-links {
    margin-bottom: 20px;
	display: grid;
	grid-template-columns: repeat(2, 1fr);
	gap: 1rem;
}

.mobile-nav-links a {
    padding: 5px 0px;
    text-decoration: none;
    color: var(--dark-text);
    font-weight: 500;
    font-size: 1.0rem;
    border-radius: 10px;
    transition: all 0.3s ease;
	text-align: center;
}

.mobile-nav-links a:hover,
.mobile-nav-links a.active {
    background: linear-gradient(135deg, rgba(185, 236, 255, 0.3) 0%, rgba(145, 155, 235, 0.2) 50%, rgba(177, 114, 244, 0.15) 100%);
    color: var(--primary-color);
}

.mobile-nav-bottom {
    display: flex;
    flex-direction: column;
    gap: 15px;
    padding-top: 20px;
    border-top: 1px solid rgba(145, 155, 235, 0.2);
}

.mobile-download {
    text-align: center;
    justify-content: center;
}

/* 移动端语言选择器 */
.mobile-language-selector {
    position: relative;
}

.mobile-language-selector .language-btn {
    width: 100%;
    justify-content: center;
}

.mobile-language-selector .language-dropdown {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    border: 1px solid rgba(145, 155, 235, 0.2);
    margin-top: 10px;
    max-height: 0;
    overflow: hidden;
    padding: 0;
    transition: max-height 0.3s ease, padding 0.3s ease;
}

.mobile-language-selector.active .language-dropdown {
    max-height: 300px;
    padding: 10px;
	overflow: auto;
}

.mobile-language-selector .language-arrow {
    transition: transform 0.3s ease;
}

.mobile-language-selector.active .language-arrow {
    transform: rotate(90deg);
}

.scroll-reveal {
    opacity: 0;
    transform: translateY(50px);
    transition: all 0.6s ease;
}

.scroll-reveal.active {
    opacity: 1;
    transform: translateY(0);
}

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

    .hero-content h1 {
        font-size: 2.5rem;
    }

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

    .hero-image {
        order: -1;
    }

    .advantage-card,
    .advantage-card-reverse {
        flex-direction: column;
        text-align: center;
        gap: 20px;
    }

    /* 确保图片始终在上方 */
    .advantage-card .advantage-image,
    .advantage-card-reverse .advantage-image {
        order: -1;
        width: 100%;
        max-width: 100%;
        height: auto;
        aspect-ratio: 16 / 10;
    }

    .advantage-card:hover,
    .advantage-card-reverse:hover {
        transform: translateY(-5px);
    }

    .advantage-title {
        justify-content: center;
        flex-direction: column;
        gap: 10px;
    }

    .advantage-icon {
        width: 50px;
        height: 50px;
        font-size: 1.5rem;
    }

    .advantage-content {
        max-width: 100%;
        display: flex;
        flex-direction: column;
        align-items: center;
    }

    .advantage-content h3 {
        font-size: 1.3rem;
    }

    .advantage-content p {
        font-size: 1rem;
        line-height: 1.6;
    }

    .tools-container {
        display: flex;
        flex-direction: column;
        gap: 20px;
    }

    /* 隐藏桌面端tab */
    .tools-tabs-left,
    .tools-tabs-right {
        display: none;
    }

    /* 显示移动端tab - 两行三列 */
    .mobile-tools-tabs {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 10px;
        order: -1;
    }

    .mobile-tool-tab {
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 8px;
        padding: 15px 10px;
        background: var(--white);
        border-radius: 12px;
        cursor: pointer;
        transition: all 0.3s ease;
        border: 2px solid transparent;
        text-align: center;
    }

    .mobile-tool-tab:hover {
        border-color: var(--primary-color);
        transform: translateY(-3px);
        box-shadow: var(--shadow);
    }

    .mobile-tool-tab.active {
        background: linear-gradient(135deg, rgba(185, 236, 255, 0.2) 0%, rgba(145, 155, 235, 0.2) 50%, rgba(177, 114, 244, 0.2) 100%);
        border-color: var(--primary-color);
    }

    .mobile-tool-tab .tool-tab-icon {
        width: 50px;
        height: 50px;
        font-size: 1rem;
    }

    .mobile-tool-tab h4 {
        font-size: 0.9rem;
        color: var(--dark-text);
        margin: 0;
        font-weight: 600;
    }

    .mobile-tool-tab.active h4 {
        color: var(--primary-color);
    }

    .tools-preview {
        min-height: auto;
    }

    .why-content-item.active {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .why-content-right {
        order: -1;
    }

    .why-icon {
        margin: 0 auto 20px;
    }

    .why-choose-tabs {
        gap: 10px;
    }

    .why-tab {
        padding: 12px 20px;
        font-size: 0.9rem;
    }

    /* 隐藏桌面端导航元素 */
    .navtop {
        display: none;
    }

    /* 显示移动端汉堡菜单 */
    .mobile-menu-toggle {
        display: block;
    }

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

    .step-header {
        justify-content: center;
    }

    .step p {
        padding-inline-start: 0;
    }

    .download-buttons {
        flex-direction: column;
        align-items: flex-start;
    }

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

    .download-wrapper {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .download-content {
        text-align: center;
    }

    .download-buttons {
        align-items: center;
    }

    .download-image {
        order: -1;
    }

    .testimonial-item {
        padding: 0 40px;
    }

    .testimonial-nav {
        width: 40px;
        height: 40px;
    }

    .testimonials-header h2 {
        font-size: 1.8rem;
    }
}

@media (max-width: 768px) {
	.navbar .container {
		padding:1rem;
	}
	.logo i {
		margin-right:0;
	}
	.logo {
		font-size:1.4rem;
	}
    .hero {
        padding: 120px 0 80px;
		height:100vh;
    }

    .hero-content h1 {
        font-size: 2rem;
    }
	.hero-image {
		width:100%;
	}
	.carousel-indicators {
		bottom:0.5rem;
	}
    .section-header h2 {
        font-size: 2rem;
    }
	.carousel {
		padding-bottom:2rem;
	}

    .features,
    .advantages,
    .online-convert,
    .download {
        padding: 3rem 0;
    }
	
	.features-grid {
		display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
	}
	
	.section-header {
		margin-bottom:2rem;
	}

    .feature-item {
        padding:2rem 1rem;
    }
	
	.feature-item h3 {
		margin-bottom:0;
		font-size:1.2rem;
	}
	
	.why-choose-tabs {
		display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
	}
	.why-tab {
		display:flex;
		font-size:1.0rem;
		justify-content: center;
		text-align: center;
	}
	.why-content-item {
		gap:1rem;
	}
	.btn-download {
		padding:0.5rem 3rem;
	}
	.fa-windows, .fa-apple, .fa-linux {
		width:2.8rem;
		height:2.8rem;
	}
	
	.why-content-right p {
		font-size:1.0rem;
	}

    .convert-form {
        padding: 30px 25px;
    }

    .step {
        padding: 20px;
    }

    .languages-grid {
        gap: 10px 15px;
    }

    .lang-item {
        padding: 6px 12px;
        font-size: 0.85rem;
    }
	.footer {
		padding:2rem 0 1rem 0;
	}
	.footer-brand {
		margin-bottom:0;
	}
	.footer-content {
		margin-bottom:1.5rem;
	}
	.footer-bottom {
		padding-top:1rem;
	}
	.footer-links {
		gap: 0.65rem 1rem;
		font-size: 0.85rem;
		margin-bottom: 1rem;
	}
}

@media (max-width: 576px) {
    .hero-content h1 {
        font-size: 1.8rem;
    }

    .hero-content p {
        font-size: 1rem;
    }

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

    .hero-buttons a {
        width: 100%;
        max-width: 250px;
        justify-content: center;
    }

    .section-header h2 {
        font-size: 1.8rem;
    }

    .section-header p {
        font-size: 1rem;
    }
}

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

.feature-item,
.step,
.advantage-card {
    animation: fadeInUp 0.6s ease forwards;
}

.feature-item:nth-child(1) { animation-delay: 0.1s; }
.feature-item:nth-child(2) { animation-delay: 0.15s; }
.feature-item:nth-child(3) { animation-delay: 0.2s; }
.feature-item:nth-child(4) { animation-delay: 0.25s; }
.feature-item:nth-child(5) { animation-delay: 0.3s; }
.feature-item:nth-child(6) { animation-delay: 0.35s; }
.feature-item:nth-child(7) { animation-delay: 0.4s; }
.feature-item:nth-child(8) { animation-delay: 0.45s; }

.step:nth-child(1) { animation-delay: 0.1s; }
.step:nth-child(3) { animation-delay: 0.2s; }
.step:nth-child(5) { animation-delay: 0.3s; }

.advantage-card:nth-child(1) { animation-delay: 0.1s; }
.advantage-card:nth-child(2) { animation-delay: 0.2s; }
.advantage-card:nth-child(3) { animation-delay: 0.3s; }

/* --------------------------------------------------------------------------
   RTL（ar / fa / he / ur）：由 JS 设置 <html dir="rtl">，整页书写方向与导航/首屏栅格一致镜像。
   不再对子元素单独 direction:rtl，避免出现「导航仍左对齐、正文却左右颠倒」的割裂感。
   -------------------------------------------------------------------------- */

html[dir="rtl"] {
    direction: rtl;
}

html[dir="rtl"] [data-lang-key] {
    unicode-bidi: isolate;
}

html[dir="rtl"] .nav-links a.active::after,
html[dir="rtl"] .nav-links a:not(.btn-primary)::before {
    left: auto;
    right: 0;
}