/* CSS变量 */
:root {
    --primary-blue: #4A90E2;
    --primary-dark: #2B579A;
    --text-primary: #333333;
    --text-secondary: #666666;
    --text-light: #999999;
    --bg-white: #ffffff;
    --bg-light: #f5f7fa;
    --bg-gray: #f0f2f5;
    --border-color: #e8e8e8;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.12);
}

/* 基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family:"微软雅黑", -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', Helvetica, Arial, sans-serif;
    color: var(--text-primary);
    line-height: 1.6;
    background: var(--bg-white);
}

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

a {
    text-decoration: none;
    color: inherit;
}

/* 置顶导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 70px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
    z-index: 1000;
}

.navbar-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}
.navbar .container {
	max-width: inherit;
	padding:0 20px;
}

/* Logo */
.logo a {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 20px;
    font-weight: 600;
    color: var(--primary-blue);
}

.logo i {
    width:48px;
	height:48px;
}
.logo i img {
	width:100%;
}
.logo span {
	background: linear-gradient(135deg, #5984E6 0%, #7351AB 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* 导航菜单 */
.nav-menu {
    display: flex;
    align-items: center;
    gap: 40px;
}

.nav-link {
    font-size: 18px;
    color: var(--text-secondary);
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-blue);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, #4A90E2 0%, #357ABD 100%);
    border-radius: 1px;
}

/* 右侧区域 */
.nav-right {
    display: flex;
    align-items: center;
    gap: 20px;
}

/* 语言选择器 - 自定义下拉框 */
.language-dropdown {
    position: relative;
}

.lang-current {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 0 14px;
    background: var(--bg-light);
    border-radius: 30px;
    cursor: pointer;
    transition: all 0.3s ease;
    border: 1px solid transparent;
	height:48px;
	line-height: 48px;
	justify-content: center;
}

.lang-current:hover {
    background: var(--bg-gray);
    border-color: var(--border-color);
}

.lang-current i.fa-globe {
    width:18px;
	height:18px;
	display: flex;
}
.lang-current i.fa-globe img {
	width:100%;
}

.lang-text {
    font-size: 16px;
    color: var(--text-secondary);
    font-weight: 500;
}

.lang-arrow {
    font-size: 10px;
    color: var(--text-light);
    transition: transform 0.3s ease;
	width: 9px;  
    height: 9px;  
    border-style: solid;  
    border-width: 1px 1px 0 0;  
    border-color: #ababab;  
    -webkit-transform-origin: 75% 25%;  
    -webkit-transform: rotateZ(45deg);  
    -webkit-transition: 100ms ease-in .1s;  
    transition: 100ms ease-in .1s;
	margin-top: 7px;
}

.language-dropdown:hover .lang-arrow {
    transform: rotate(90deg);
}

/* 下拉选项 */
.lang-options {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    min-width: 160px;
    max-height: 300px;
    overflow-y: auto;
    background: white;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    z-index: 1001;
}

.language-dropdown:hover .lang-options,
.language-dropdown:focus-within .lang-options {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

/* 语言下拉框滚动条样式 */
.lang-options::-webkit-scrollbar {
    width: 6px;
}

.lang-options::-webkit-scrollbar-track {
    background: transparent;
}

.lang-options::-webkit-scrollbar-thumb {
    background: #ddd;
    border-radius: 3px;
}

.lang-options::-webkit-scrollbar-thumb:hover {
    background: #ccc;
}

.lang-option {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 13px;
    color: var(--text-secondary);
}

.lang-option:hover {
    background: var(--bg-light);
    color: var(--primary-blue);
}

.lang-option.active {
    background: linear-gradient(135deg, rgba(74, 144, 226, 0.1) 0%, rgba(53, 122, 189, 0.1) 100%);
    color: var(--primary-blue);
    font-weight: 500;
}

.lang-option i.fa-check {
    font-size: 12px;
    opacity: 0;
    width: 16px;
}

.lang-option.active i.fa-check {
    opacity: 1;
}

/* 导航栏下载按钮 */
.btn-download-nav {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 0 20px;
    background: linear-gradient(135deg, #5984E6 0%, #7154B0 100%);
    color: white;
    font-size: 16px;
    font-weight: 500;
    border-radius: 30px;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(74, 144, 226, 0.3);
	height:48px;
	line-height: 48px;
}

.btn-download-nav:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(74, 144, 226, 0.4);
}

.fa-download {
	display:flex;
	width:22px;
	height: 22px;
}
.fa-download img {
	width:100%;
}

/* 移动端菜单按钮 */
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    width: 30px;
    height: 24px;
    cursor: pointer;
    padding: 0;
    position: relative;
    flex-direction: column;
    justify-content: space-between;
}

.menu-icon-bar {
    display: block;
    width: 100%;
    height: 3px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all 0.3s ease;
}

.mobile-menu-btn:hover .menu-icon-bar {
    background: var(--primary-blue);
}

/* 移动端菜单面板 */
.mobile-menu-panel {
    position: fixed;
    top: 0;
    right: -300px;
    width: 280px;
    height: 100vh;
    background: white;
    box-shadow: -4px 0 20px rgba(0, 0, 0, 0.15);
    z-index: 1001;
    transition: right 0.3s ease;
    overflow-y: auto;
}

.mobile-menu-panel.active {
    right: 0;
}

.mobile-menu-content {
    padding: 20px;
}

.mobile-menu-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border-color);
}

.mobile-menu-header span {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
}

.mobile-menu-close {
    background: none;
    border: none;
    width: 24px;
    height: 24px;
    cursor: pointer;
    padding: 0;
    position: relative;
}

.close-icon-line {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--text-secondary);
    border-radius: 1px;
    position: absolute;
    top: 50%;
    left: 0;
    transition: all 0.3s ease;
}

.close-icon-line:first-child {
    transform: translateY(-50%) rotate(45deg);
}

.close-icon-line:last-child {
    transform: translateY(-50%) rotate(-45deg);
}

.mobile-menu-close:hover .close-icon-line {
    background: var(--primary-blue);
}

.mobile-menu-links {
    display: flex;
    flex-direction: column;
}

.mobile-nav-link {
    display: block;
    padding: 12px 16px;
    color: var(--text-primary);
    font-size: 15px;
    font-weight: 500;
    border-radius: 8px;
    transition: all 0.2s ease;
}

.mobile-nav-link:hover,
.mobile-nav-link.active {
    background: var(--bg-light);
    color: var(--primary-blue);
}

.mobile-menu-divider {
    height: 1px;
    background: var(--border-color);
    margin: 20px 0;
}

.mobile-menu-langs {
    margin-bottom: 10px;
}

.mobile-lang-title {
    font-size: 14px;
    color: var(--text-light);
    margin-bottom: 12px;
}

.mobile-lang-dropdown {
    position: relative;
}

.mobile-lang-current {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    background: var(--bg-light);
    border-radius: 30px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.mobile-lang-current:hover {
    background: var(--bg-gray);
}

.mobile-lang-current i {
    font-size: 12px;
    color: var(--text-light);
    transition: transform 0.3s ease;
	width: 12px;  
    height: 12px;  
    border-style: solid;  
    border-width: 1px 1px 0 0;  
    border-color: #ababab;  
    -webkit-transform-origin: 75% 25%;  
    -webkit-transform: rotateZ(45deg);  
    -webkit-transition: 100ms ease-in .1s;  
    transition: 100ms ease-in .1s;
}

.mobile-lang-dropdown.open .mobile-lang-current i {
    transform: rotate(135deg);
}

.mobile-lang-list {
    position: absolute;
    top: calc(100% + 8px);
    left: 0;
    right: 0;
    max-height: 0;
    overflow: hidden;
    background: white;
    border-radius: 8px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
    transition: max-height 0.3s ease;
    z-index: 10;
}

.mobile-lang-dropdown.open .mobile-lang-list {
    max-height: 200px;
    overflow-y: auto;
}

/* 移动端语言下拉框滚动条样式 */
.mobile-lang-list::-webkit-scrollbar {
    width: 4px;
}

.mobile-lang-list::-webkit-scrollbar-track {
    background: transparent;
}

.mobile-lang-list::-webkit-scrollbar-thumb {
    background: #ddd;
    border-radius: 2px;
}

.mobile-lang-item {
    padding: 12px 16px;
    font-size: 14px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s ease;
}

.mobile-lang-item:hover {
    background: var(--bg-light);
    color: var(--primary-blue);
}

.mobile-lang-item.active {
    background: linear-gradient(135deg, rgba(74, 144, 226, 0.1) 0%, rgba(53, 122, 189, 0.1) 100%);
    color: var(--primary-blue);
    font-weight: 500;
}

.mobile-download-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    padding: 14px 20px;
    background: linear-gradient(135deg, #4A90E2 0%, #357ABD 100%);
    color: white;
    font-size: 15px;
    font-weight: 500;
    border-radius: 25px;
    transition: all 0.3s ease;
}

.mobile-download-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(74, 144, 226, 0.4);
}
.mobile-download-btn i {
	display:block;
	width:24px;
	height:24px;
}
.mobile-download-btn i img {
	width:100%;
}

/* 移动端菜单遮罩层 */
.mobile-menu-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

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

/* 顶部区域 */
.hero-section {
    padding: 130px 0 40px;
    background: linear-gradient(180deg, #f0f7ff 0%, #ffffff 100%);
    text-align: center;
}
.hero-bg {
	background:url(../images/banner_bg.jpg) no-repeat center bottom;
	background-size: 100% auto;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.main-title {
    font-size: 42px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.main-title .highlight {
    color: var(--primary-blue);
}

.subtitle {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 30px;
}

.download-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 20px;
}
.download-buttons i {
	width:30px;
	height:30px;
}
.download-buttons i img {
	width:100%;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 14px 32px;
    border-radius: 40px;
    font-size: 18px;
    font-weight: 500;
    transition: all 0.3s ease;
	background: linear-gradient(135deg, #333333 0%, #555555 100%);
	box-shadow: 0 4px 12px rgba(74, 144, 226, 0.3);
	color: white;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(74, 144, 226, 0.4);
}

.stats {
    font-size: 16px;
    color: var(--text-light);
}

/* 软件图片展示区域 */
.hero-software-image {
    margin-top: 40px;
    padding: 0 20px;
}

.software-image-wrapper {
    max-width: 1000px;
    margin: 0 auto;
}

.software-image-placeholder {
    width: 100%;
    height: 400px;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    border: 2px dashed #cbd5e1;
    border-radius: 16px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 16px;
    transition: all 0.3s ease;
}

.software-image-placeholder:hover {
    border-color: var(--primary-blue);
    background: linear-gradient(135deg, #f0f7ff 0%, #e8f4ff 100%);
}

.software-image-placeholder i {
    font-size: 48px;
    color: #94a3b8;
}

.software-image-placeholder span {
    font-size: 18px;
    color: #64748b;
    font-weight: 500;
}

.software-image-placeholder p {
    font-size: 13px;
    color: #94a3b8;
}

/* 功能图标区域 */
.features-icons {
    padding: 40px 0;
    background: var(--bg-white);
}

.icons-grid {
    display: flex;
    justify-content: center;
    gap: 40px 60px;
    flex-wrap: wrap;
}

.icon-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.icon-circle {
    width: 90px;
    height: 90px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-sm);
}
.icon-circle img {
	width:52%;
}

.icon-circle.blue {
    background: linear-gradient(135deg, #4A90E2 0%, #6BA3E0 100%);
}

.icon-circle.green {
    background: linear-gradient(135deg, #52C41A 0%, #73D13D 100%);
}

.icon-circle.orange {
    background: linear-gradient(135deg, #FA8C16 0%, #FFC53D 100%);
}

.icon-circle.purple {
    background: linear-gradient(135deg, #722ED1 0%, #B37FEB 100%);
}

.icon-circle.red {
    background: linear-gradient(135deg, #F5222D 0%, #FF7875 100%);
}

.icon-circle.cyan {
    background: linear-gradient(135deg, #13C2C2 0%, #5CDBD3 100%);
}

.icon-circle.pink {
    background: linear-gradient(135deg, #EB2F96 0%, #F759AB 100%);
}

.icon-circle.teal {
    background: linear-gradient(135deg, #20C997 0%, #36CFC9 100%);
}

.icon-item span {
    font-size: 18px;
    color: var(--text-secondary);
}

/* 功能区块 */
.feature-section {
    padding: 60px 0;
    background: var(--bg-white);
}

.feature-section.alt-bg {
    background: var(--bg-light);
}

.feature-row {
    display: flex;
    align-items: center;
    gap: 60px;
}

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

.feature-text {
    flex: 1;
}

.feature-title {
    font-size: 28px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 24px;
	display: flex;
	align-items: center;
	gap:10px;
}
.feature-title i {
	display:flex;
	width:56px;
	height:56px;
}
.feature-title img {
	width:100%;
}

.feature-list {
    list-style: none;
	display:flex;
	gap:20px;
	flex-direction: column;
}

.feature-list li {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 17px;
    color: var(--text-secondary);
}

.feature-list li i {
    color: #52C41A;
    width:24px;
	height:24px;
}
.feature-list li i img {
	width:100%;
}

.feature-image {
    flex: 1;
}

.feature-image img {
    width: 100%;
    max-width: 500px;
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
}

.download-buttons-small {
    display: flex;
    gap: 12px;
    margin-top: 24px;
}

.btn-windows-small,
.btn-mac-small {
    padding: 10px 20px;
    font-size: 14px;
}

/* Tab选项卡功能区域 */
.tab-features-section {
    padding: 60px 0;
    background: var(--bg-white);
}

.tab-content-wrapper {
    display: flex;
    gap: 60px;
    align-items: stretch;
}

/* 左侧Tab列表 */
.tab-list {
    flex: 0 0 400px;
    display: flex;
    flex-direction: column;
    gap: 0;
    justify-content: space-between;
}

.tab-item {
    display: flex;
    gap: 16px;
    padding: 20px 0;
    border-bottom: 1px solid var(--border-color);
    cursor: pointer;
    transition: all 0.3s ease;
    flex: 1;
    align-items: center;
}

/*.tab-item:first-child {
    padding-top: 0;
}*/

.tab-item:last-child {
    border-bottom: none;
}

.tab-item:hover {
    background: var(--bg-light);
    margin: 0 -20px;
    padding-left: 20px;
    padding-right: 20px;
}

.tab-item:first-child:hover {
    padding-top: 0;
}

.tab-item:last-child:hover {
    padding-bottom: 0;
}

.tab-icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--primary-blue);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 14px;
}
.tab-icon img {
	width:60%;
}

.tab-item.active .tab-icon {
    background: var(--primary-blue);
}

.tab-item:not(.active) .tab-icon {
    background: #c0c4cc;
}

.tab-text h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.tab-item.active .tab-text h3 {
    color: var(--primary-blue);
}

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

.tab-item.active .tab-text p {
    display: block;
}

/* 右侧图片区域 */
.tab-image-area {
    flex: 1;
    background: linear-gradient(135deg, #e8eaff 0%, #d4d8ff 100%);
    border-radius: 20px;
    padding: 20px;
    box-shadow: 0 20px 60px rgba(74, 144, 226, 0.15);
}

.tab-image-wrapper {
    position: relative;
    width: 100%;
    height: 100%;
    min-height: 400px;
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.tab-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    visibility: hidden;
    transition: all 0.4s ease;
}

.tab-image.active {
    opacity: 1;
    visibility: visible;
}

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

/* 其他贴心功能 */
.other-features {
    padding: 60px 0;
    background: var(--bg-white);
}

.section-title {
    font-size: 28px;
    font-weight: 600;
    color: var(--text-primary);
    text-align: center;
    margin-bottom: 40px;
}

.features-grid {
    display: flex;
    justify-content: center;
    gap: 50px;
    flex-wrap: wrap;
}

.feature-box {
	flex: 1;
    padding: 30px 20px;
    background: var(--bg-white);
    border-radius: 12px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

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

.box-icon {
    width: 90px;
    height: 90px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
    font-size: 24px;
    color: white;
}

.box-icon img {
	width:70%;
}

.box-icon.blue {
    background: linear-gradient(135deg, #4A90E2 0%, #6BA3E0 100%);
}

.box-icon.green {
    background: linear-gradient(135deg, #52C41A 0%, #73D13D 100%);
}

.box-icon.orange {
    background: linear-gradient(135deg, #FA8C16 0%, #FFC53D 100%);
}

.box-icon.purple {
    background: linear-gradient(135deg, #722ED1 0%, #B37FEB 100%);
}

.box-icon.red {
    background: linear-gradient(135deg, #F5222D 0%, #FF7875 100%);
}

.stats-text {
	text-align:center;
}

.feature-box h3 {
    font-size:20px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 15px;
}

.feature-box p {
    font-size: 16px;
    color: var(--text-light);
}

/* Word文档AI助手 - 轮播区域 */
.ai-assistant-section {
    padding: 60px 0;
    background: var(--bg-light);
}

.ai-assistant-section .section-title .highlight {
    color: var(--primary-blue);
}

.ai-assistant-section .stats-text .highlight-number {
    color: var(--primary-blue);
    font-size: 32px;
    font-weight: 700;
}

.carousel-wrapper {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-top: 40px;
    padding: 0 10px;
}

.carousel-btn {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--primary-blue);
    border: none;
    color: white;
    font-size: 20px;
    cursor: pointer;
    transition: all 0.3s ease;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.carousel-btn:hover {
    background: var(--primary-dark);
    transform: scale(1.1);
}
.carousel-btn img {
	width:54%;
}

.carousel-container {
    flex: 1;
    overflow: hidden;
    padding: 20px 10px;
    position: relative;
}

.carousel-track {
    display: flex;
    gap: 30px;
    transition: transform 0.5s ease;
    will-change: transform;
}

.carousel-card {
    flex: 0 0 calc(33.333% - 20px);
    min-width: 280px;
    max-width: 350px;
    background: white;
    border-radius: 16px;
    padding: 30px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    text-align: center;
    transition: all 0.3s ease;
}

.carousel-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.12);
}

.card-icon {
    width: 90px;
    height: 90px;
    border-radius: 50%;
    background: linear-gradient(135deg, #4A90E2 0%, #357ABD 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 28px;
    color: white;
    box-shadow: 0 4px 15px rgba(74, 144, 226, 0.3);
}

.card-icon img {
	width:64%;
}

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

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

/* 底部下载区域 */
.footer-download {
    padding: 60px 0;
    background: linear-gradient(135deg, #5984E6 0%, #7055B1 100%);
    text-align: center;
}

.footer-title {
    font-size: 32px;
    font-weight: 600;
    color: white;
    margin-bottom: 12px;
}

.footer-subtitle {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 30px;
}

.footer-download .download-buttons {
    margin-bottom: 0;
}

.hero-section .btn {
	background: linear-gradient(135deg, #5984E6 0%, #91B6FE 100%);
}

/* 页脚 */
.footer {
    padding: 40px 0;
    background: #1a1a1a;
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.footer-logo i {
    width: 48px;
	height:48px;
    background: linear-gradient(135deg, #4A90E2 0%, #357ABD 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.footer-logo i img {
	width:100%;
}

.footer-logo span {
    font-size: 20px;
    font-weight: 600;
    color: white;
}

.footer-languages {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.footer-languages > span {
    font-size: 14px;
    color: #999;
}

.language-tags {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
    transition: max-height 0.3s ease;
}

.language-tags.expanded {
    max-height: none;
}


.lang-tag {
    padding: 6px 14px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    font-size: 12px;
    color: #ccc;
    transition: all 0.3s ease;
}

.lang-tag:hover {
    background: var(--primary-blue);
    color: white;
}

/* 展示更多按钮 */
.lang-toggle-btn {
    display: none;
    align-items: center;
    justify-content: center;
    gap: 6px;
    margin-top: 12px;
    padding: 8px 20px;
    background: rgba(255, 255, 255, 0.1);
    border: none;
    border-radius: 20px;
    color: #ccc;
    font-size: 13px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.lang-toggle-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    color: white;
}

.lang-toggle-btn .toggle-arrow {
    width: 8px;
    height: 8px;
    border-style: solid;
    border-width: 0 2px 2px 0;
    border-color: #ccc;
    transform: rotate(45deg);
    transition: all 0.3s ease;
}

.lang-toggle-btn:hover .toggle-arrow {
    border-color: white;
}

.lang-toggle-btn.expanded .toggle-arrow {
    transform: rotate(-135deg);
}

.footer-copyright {
    font-size: 13px;
    color: #666;
}

/* 返回顶部按钮 */
.back-to-top {
    position: fixed;
    right: 30px;
    bottom: 80px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: linear-gradient(135deg, #4A90E2 0%, #357ABD 100%);
    border: none;
    color: white;
    font-size: 20px;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(74, 144, 226, 0.4);
    z-index: 999;
}
.back-to-top img {
	width:70%;
}

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

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(74, 144, 226, 0.5);
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .nav-menu {
        display: none;
    }
    
    .language-dropdown {
        display: none;
    }
    
    .btn-download-nav {
        display: none;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .feature-row,
    .feature-row.reverse {
        flex-direction: column;
        gap: 40px;
    }
    
    .feature-image img {
        max-width: 100%;
    }
    
	.features-icons .container {
		padding:0;
	}
	
    .icons-grid {
        gap: 40px;
    }
    
    .tab-content-wrapper {
        flex-direction: column;
        gap: 40px;
    }
    
    .tab-list {
        flex: 1;
        width: 100%;
    }
}

@media (max-width: 768px) {
	.software-image-wrapper {
		max-width:100%;
	}
	.software-image-wrapper img {
		width:100%;
	}
	.logo span {
		font-size:18px;
	}
	.mobile-menu-btn {
		height:22px;
		display:flex;
		gap:5px;
	}
    .main-title {
        font-size: 32px;
    }
    
    .download-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        max-width: 280px;
        justify-content: center;
    }
	.features-icons {
		padding:30px 0 10px 0;
	}
    .icons-grid {
        display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
    }
	.tab-content-wrapper {
		gap:20px;
	}
    
    .icon-circle {
        width: 56px;
        height: 56px;
    }
	.icon-item {
	    flex:1;
	}
	.icon-item span {
		font-size:16px;
	}
    
    .software-image-placeholder {
        height: 280px;
    }
    
    .software-image-placeholder i {
        font-size: 36px;
    }
    
    .software-image-placeholder span {
        font-size: 15px;
    }
    
    .features-grid {
        display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
    }
    
    .feature-box {
        width: calc(50% - 10px);
    }
    
    .carousel-card {
        flex: 0 0 calc(50% - 15px);
        min-width: 100%;
        max-width: 320px;
		padding:30px 10px;
    }
	.container {
		padding:0 20px;
	}
	.carousel-wrapper {
		padding:0;
		gap:0;
	}
	.box-icon {
		width:64px;
		height:64px;
	}
}

@media (max-width: 480px) {
    .logo a {
        font-size: 16px;
    }
    
    .logo i {
        font-size: 22px;
    }
    
    .btn-download-nav {
        padding: 8px 14px;
        font-size: 12px;
    }
    
    .hero-section {
        padding: 100px 0 30px;
    }
    
    .main-title {
        font-size: 26px;
    }
    
    .subtitle {
        font-size: 15px;
    }
    
    .hero-software-image {
        margin-top: 30px;
    }
    
    .software-image-placeholder {
        height: 200px;
    }
    
    .software-image-placeholder i {
        font-size: 28px;
    }
    
    .software-image-placeholder span {
        font-size: 14px;
    }
    
    .software-image-placeholder p {
        font-size: 12px;
    }
    
    .feature-title,
    .section-title {
        font-size: 22px;
		margin-bottom: 20px;
    }
	.footer-title {
		font-size:24px;
	}
    
    .feature-box {
        width: 100%;
		padding:30px 10px;
    }
    
    .download-buttons-small {
        flex-direction: column;
    }
    
    .btn-windows-small,
    .btn-mac-small {
        width: 100%;
        justify-content: center;
    }
	.tab-list {
		flex-direction:row;
	}
    
    .tab-item {
        padding: 16px 0;
		flex-direction: column;
		border-bottom: none;
    }
    
    .tab-text h3 {
        font-size: 15px;
    }
    
    .tab-text p,.tab-item.active .tab-text p {
        display: none;
    }
    
    .tab-image-area {
        padding: 12px;
        border-radius: 16px;
    }
    
    .tab-image-wrapper {
        min-height: 250px;
    }

    
    .carousel-btn {
        width: 40px;
        height: 40px;
        font-size: 16px;
    }
    
    .ai-assistant-section .stats-text .highlight-number {
        font-size: 24px;
    }
    
    .footer-download .download-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .footer-download .btn {
        width: 100%;
        max-width: 280px;
        justify-content: center;
    }
    
    .footer-logo span {
        font-size: 16px;
    }
    
    .language-tags {
        gap: 8px;
        max-height: 70px;
        overflow: hidden;
    }
    
    .language-tags.expanded {
        max-height: none;
        overflow: visible;
    }
    
    .lang-tag {
        padding: 5px 10px;
        font-size: 13px;
    }
    
    .lang-toggle-btn {
        display: flex;
		margin-top: 5px;
    }
    
    .back-to-top {
        right: 10px;
        bottom: 60px;
        width: 44px;
        height: 44px;
        font-size: 18px;
    }
}