/* 全局样式 */
:root {
    --background: 0 0% 100%;
    --foreground: 0 0% 3.9%;
    --card: 0 0% 100%;
    --card-foreground: 0 0% 3.9%;
    --popover: 0 0% 100%;
    --popover-foreground: 0 0% 3.9%;
    --primary: 0 0% 9%;
    --primary-foreground: 0 0% 98%;
    --secondary: 0 0% 96.1%;
    --secondary-foreground: 0 0% 9%;
    --muted: 0 0% 96.1%;
    --muted-foreground: 0 0% 45.1%;
    --accent: 0 0% 96.1%;
    --accent-foreground: 0 0% 9%;
    --destructive: 0 84.2% 60.2%;
    --destructive-foreground: 0 0% 98%;
    --border: 0 0% 89.8%;
    --input: 0 0% 89.8%;
    --ring: 0 0% 3.9%;
    --radius: 0.5rem;
}

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

body {
    font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
    color: rgb(17, 24, 39);
    line-height: 1.5;
    letter-spacing: -0.025em;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* 导航栏样式 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 64px;
    background: white;
    z-index: 1000;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.nav-container {
    position: relative;
    width: 100%;
    height: 100%;
}

/* Logo样式 */
.logo-link {
    position: absolute;
    left: 50px;
    top: 55%;
    transform: translateY(-50%);
}

.logo {
    width: 125.02px;
    height: 50.86px;
}

/* 导航链接样式 */
.nav-links {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    display: flex;
    align-items: center;
    gap: 20px;
    height: 100%;
}

.nav-link {
    position: relative;
    font-size: 17px;
    font-weight: bold;
    line-height: normal;
    text-align: center;
    letter-spacing: 0;
    font-variation-settings: "opsz" auto;
    color: #3D3D3D;
    text-decoration: none;
    white-space: nowrap;
    padding: 0 5px;
    height: 100%;
    display: flex;
    align-items: center;
    transition: color 0.3s ease-in-out;
}

.nav-link::after {
    content: "";
    position: absolute;
    width: 0%;
    height: 3px;
    background-color: #342DFF;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    transition: width 0.3s ease-in-out;
}

.nav-link:hover {
    color: #6B66FF;
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.nav-link.active {
    color: #342DFF;
}

/* 导航按钮样式 */
.nav-button {
    text-decoration: none;
    position: absolute;
    right: 50px;
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    background: #4F46E5;
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s ease-in-out;
}

.nav-button:hover {
    background: #4338CA;
    transform: translateY(-50%) scale(1.02);
}

.nav-button svg {
    width: 18px;
    height: 18px;
    stroke: white;
    stroke-width: 1.75;
    transition: transform 0.2s ease;
}

.nav-button:hover svg {
    transform: scale(1.1);
}

/* 联系我们二维码样式 */
.contact-link {
    position: relative;
}

.qr-code-container {
    position: absolute;
    top: 100%;
    right: 50%;
    transform: translateX(50%);
    display: none;
    z-index: 1001;
    margin-top: 8px;
}

.contact-link:hover .qr-code-container {
    display: block;
}

.qr-code-box {
    background: white;
    border: 1px solid #E5E7EB;
    border-radius: 8px;
    padding: 0;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    width: 258px;
    height: 336px;
    box-sizing: border-box;
    overflow: hidden;
}

.qr-code {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

/* 二维码容器箭头 */
.qr-code-container::before {
    content: '';
    position: absolute;
    top: -8px;
    right: 50%;
    transform: translateX(50%);
    border-width: 0 8px 8px 8px;
    border-style: solid;
    border-color: transparent transparent white transparent;
}

/* 响应式布局 */
@media screen and (max-width: 1200px) {
    .nav-container {
        padding: 0 20px;
    }
    
    .nav-links {
        gap: 15px;
    }
    
    .nav-link {
        font-size: 15px;
        padding: 0 3px;
    }
    
    .nav-button {
        width: 140px;
    }
}

@media screen and (max-width: 992px) {
    .nav-links {
        display: none;
    }
    
    .nav-button {
        width: 120px;
    }
}

/* Hero区域 */
.hero-section {
    position: relative;
    height: 700px;
    padding-top: 60px;
    text-align: center;
    overflow: hidden;
    background: #F5F8FF;
}

/* 添加底部渐变遮罩 */
.hero-section::before {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 100px;
    background: linear-gradient(to bottom, transparent, #F5F8FF);
    z-index: 4;
}

/* 背景图片 */
.hero-section .bg-layer-1 {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    width: 100%;
    height: 700px;
    background: url(../images/hero-bg-1.jpg) top center no-repeat;
    background-size: cover;
    z-index: 0;
}

.hero-section .bg-layer-2 {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    width: 100%;
    height: 700px;
    background: url(../images/hero-bg-2.png) top center no-repeat;
    background-size: cover;
    opacity: 0.8;
    z-index: 1;
}

/* 内容区域整体背景 */
.content-section {
    position: relative;
    margin-top: -100px;
    padding: 0;
    z-index: 3;
    background: linear-gradient(180deg, transparent 0%, #F5F8FF 10px);
}

/* Hero内容容器 */
.hero-content {
    position: relative;
    z-index: 2;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0;
}

/* Hero标题样式 */
.hero-title {
    display: flex;
    align-items: baseline;
    justify-content: center;
    font-size: 64px;
    font-weight: bold;
    margin-bottom: 20px;
    position: relative;
    z-index: 2;
}

.hero-title .ai-logo {
    position: relative;
    top: 30px;
    left: 15px;
    width: 240px;
    height: auto;
    max-width: none;
}

.hero-subtitle {
    font-size: 36px;
    line-height: 1.5;
    margin-bottom: 15px; /* 减少副标题的底部间距 */
    font-weight: normal;
    position: relative;
    z-index: 2;
}

.hero-subtitle strong {
    font-weight: bold;
}

/* 统计数据容器 */
.stats-grid {
    display: flex;
    justify-content: center;
    gap: 40px;
    max-width: 1080px;
    margin: -10px auto 1rem; /* 使用负margin让它向上移动 */
    padding: 1rem;
    position: relative;
    z-index: 3;
}

.stat-item {
    position: relative;
    padding: 0 40px; /* 减少左右内边距 */
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.stat-number {
    font-size: 40px;
    font-weight: bold;
    margin-bottom: 5px; /* 减少数字和标签之间的间距 */
    background: linear-gradient(to top, #000000, #666666);
    -webkit-background-clip: text;
    color: transparent;
}

.stat-label {
    font-size: 18px;
    font-weight: 500;
    margin: 2px 0; /* 减少标签的上下间距 */
    color: #333;
}

.stat-desc {
    font-size: 12px;
    color: #3f3f3f;
    text-align: center;
    line-height: 1.4; /* 减少描述文字的行高 */
}

.stat-item:not(:last-child)::after {
    content: "";
    position: absolute;
    right: -20px;
    top: 50%;
    transform: translateY(-50%);
    height: 60px;
    width: 1px;
    border-left: 1px dashed #7A7A7A;
}

/* 按钮组样式 */
.button-group {
    display: flex;
    justify-content: center;
    gap: 8px;
    position: relative;
    z-index: 5;  /* 增加z-index确保按钮在最上层 */
}

.primary-button,
.secondary-button {
    display: flex;
    align-items: center;
    gap: 10px;  /* 增加图标和文字的间距 */
    padding: 15px 30px;  /* 增加内边距 */
    border-radius: 10px;  /* 稍微增加圆角 */
    font-size: 18px;  /* 增加文字大小 */
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s ease-in-out;
    position: relative;
    z-index: 5;
    text-decoration: none;
}

.primary-button {
    color: #fff;
    background: #1A1F29;
    border: none;
}

.primary-button:hover {
    background: #2A2F39;
}

.secondary-button {
    color: #1A1F29;
    background: #fff;
    border: 1px solid #E5E7EB;
}

.secondary-button:hover {
    background: #F9FAFB;
}

.primary-button svg,
.secondary-button svg {
    width: 24px;  /* 增加图标大小 */
    height: 24px;
    stroke-width: 1.75;  /* 稍微调细一点线条 */
    transition: transform 0.2s ease;
}

.primary-button:hover svg,
.secondary-button:hover svg {
    transform: scale(1.1);  /* 悬停时图标稍微放大 */
}

.primary-button svg {
    stroke: white;  /* 主按钮使用白色描边 */
}

.secondary-button svg {
    stroke: #1A1F29;  /* 次要按钮使用深色描边 */
}

.button-group {
    display: flex;
    justify-content: center;
    gap: 15px;  /* 增加按钮之间的间距 */
    position: relative;
    z-index: 5;
}

/* 内容区域整体背景 */
.content-section {
    position: relative;
    margin-top: 0;
    padding: 0;
    z-index: 1;  /* 降低content-section的z-index */
    background: #F5F8FF;
}

/* 统一section基础样式 */
.interview-section,
.simulation-section,
.features-section,
.faq-section,
.training-section {
    position: relative;
    padding: 4rem 0;
    overflow: hidden;
    min-height: 800px;  /* 只保留最小高度设置 */
}

/* 内容容器样式 */
.section-content {
    position: relative;
    z-index: 2;
    max-width: 1300px;
    margin: 0 auto;
    padding: 30px 0 0;  /* 增加上下内边距 */
}

/* FAQ部分布局 */
.faq-section {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
    position: relative;
    z-index: 1;
}

.faq-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 32px;
}

.title-with-decoration {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.title-with-decoration .section-title {
    font-size: 50px;
    margin: 0;
    padding: 0;
    text-align: left;
}

.title-decoration {
    width: 180px;
    height: 20px;
    margin-top: 8px;
}

.toggle-all-btn {
    background: #000;
    color: #fff;
    padding: 12px 24px;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    font-size: 16px;
    transition: all 0.3s ease;
    position: relative;
    z-index: 2;
}

.toggle-all-btn:hover {
    background: #333;
}

/* FAQ列表容器 */
.faq-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
    position: relative;
    z-index: 2;
}

/* FAQ条目样式 */
.faq-item {
    background: #FFFFFF;
    border-radius: 12px;
    padding: 24px;
    cursor: pointer;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    position: relative;
    z-index: 2;
}

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 24px; /* 增大字号 */
    color: #1F2937;
}

.faq-question strong {
    font-weight: 600;
}

.toggle-icon {
    width: 24px;
    height: 24px;
    transition: transform 0.3s ease;
    margin-left: 16px;
    flex-shrink: 0;
}

.faq-item.active .toggle-icon {
    transform: rotate(180deg);
}

.faq-answer {
    display: none;
    margin-top: 16px;
    color: #4B5563;
    line-height: 1.6;
    font-size: 18px;
}

.faq-item.active .faq-answer {
    display: block;
}

/* 移除其他可能冲突的样式 */
.section-content, .gradient-line {
    display: block;
}

/* 特性卡片网格布局 */
.features-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(280px, 1fr));
    gap: 32px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

/* 特性卡片样式 */
.feature-card {
    background: #FFFFFF;
    border-radius: 12px;
    padding: 24px !important;
    text-align: center;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    min-width: 280px;
}

.feature-card .feature-icon {
    width: auto;
    height: auto;
    margin-bottom: 24px;
    display: block;
}

.feature-text-container {
    width: 100%;
    text-align: left;
    padding: 0 !important;
}

.feature-card .feature-title {
    font-size: 24px; /* 增大标题字体 */
    font-weight: bold;
    margin: 0;
    color: #1F2937;
    text-align: left;
    padding: 0 !important;
}

.feature-card .feature-desc {
    font-size: 16px;
    font-weight: normal;
    margin: 8px 0 0 0;
    color: #4B5563;
    line-height: 1.6;
    text-align: left;
    padding: 0 !important;
}

/* 标题样式 */
.section-title {
    position: relative;
    z-index: 2;
    font-size: 50px;
    font-weight: bold;
    text-align: center;
    margin-bottom: 1.5rem;
    padding: 0;
    color: #1F2937;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}

/* 标题图标样式 */
.title-icon {
    width: 64px;
    height: 64px;
    margin: 0;
    transition: transform 0.3s ease;
}

/* 标题文字样式 */
.title-text {
    font-size: 50px;
    font-weight: bold;
    display: block;
    margin: 0;
    line-height: 1.2;
}

/* 标题装饰线样式 */
.section-title::after {
    content: '';
    display: block;
    width: 100%;
    height: 20px;
    margin: 0.5rem 0 0;
    background: url(../images/line.svg) center no-repeat;
    background-size: contain;
}

/* 按钮组样式 */
.button-group {
    display: flex;
    gap: 20px;
    justify-content: center;
}

/* 特性区域 */
.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0;
}

.feature-icon {
    width: 3rem;
    height: 3rem;
    margin-bottom: 1rem;
}

.feature-title {
    font-size: 1.5rem;
    font-weight: bold;
    margin-bottom: 1rem;
}

.feature-desc {
    font-size: 1rem;
    color: #6B7280;
    line-height: 1.6;
}

/* 我们的优势部分 */
.features-section {
    padding: 4rem 0;
    background: #F9FAFB;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

.feature-card {
    background: #fff;
    padding: 2rem;
    border-radius: 1rem;
    text-align: center;
    transition: transform 0.3s ease;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.feature-card:hover {
    transform: translateY(-5px);
}

.feature-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 1.5rem;
}

.feature-title {
    font-size: 1.25rem;
    font-weight: bold;
    margin: 0;
    color: #1F2937;
    text-align: left;
}

.feature-desc {
    font-size: 0.875rem;
    color: #6B7280;
    line-height: 1.6;
    text-align: left;
}

/* 统计数据样式 */
.stats-grid {
    display: flex;
    justify-content: center;
    gap: 40px;
    max-width: 1080px;
    margin: 0 auto;
    padding: 2rem;
    position: relative;
    z-index: 3;
}

.stat-item {
    position: relative;
    padding: 0 50px;
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.stat-item:not(:last-child)::after {
    content: "";
    position: absolute;
    right: -20px;
    top: 50%;
    transform: translateY(-50%);
    height: 60px;
    width: 1px;
    border-left: 1px dashed #7A7A7A;
}

.stat-number {
    font-size: 40px;
    font-weight: bold;
    margin-bottom: 5px;
    background: linear-gradient(to top, #000000, #666666);
    -webkit-background-clip: text;
    color: transparent;
}

.stat-label {
    font-size: 18px;
    font-weight: 500;
    margin: 5px 0;
    color: #333;
}

.stat-desc {
    font-size: 12px;
    color: #3f3f3f;
    text-align: center;
    line-height: 1.6;
}

/* 页脚 */
.footer {
    background: white;
    padding: 3rem 1rem;
    margin-top: 0;  /* 移除上边距 */
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 2rem;
}

.footer-brand p {
    color: #6B7280;
    font-size: 1rem;
    margin-top: 0.5rem;
}

.footer-logo {
    height: 3rem;  /* 增大左侧logo */
    margin-bottom: 1rem;
}

.footer-links h4 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    font-weight: normal;  /* 移除链接标题加粗 */
}

.footer-link {
    color: #6B7280;
    text-decoration: none;
    font-size: 1rem;
    display: block;
    margin-bottom: 0.5rem;
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-link {
    position: relative;
    display: inline-block;
}

.social-icon {
    width: 3rem;
    height: 3rem;
}

.social-link .qr-code-box {
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: white;
    padding: 12px;  /* 增加内边距 */
    border-radius: 12px;  /* 增加圆角 */
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    display: none;
    margin-bottom: 12px;
    z-index: 100;
    width: 240px;  /* 增大容器宽度 */
    height: 240px;  /* 增大容器高度 */
}

.social-link .qr-code {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: contain;
}

.social-link .qr-code-box::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    border-left: 8px solid transparent;
    border-right: 8px solid transparent;
    border-top: 8px solid white;
}

.social-link:hover .qr-code-box {
    display: block;
}

/* AI面试精灵和模拟面试部分 */
.interview-section,
.simulation-section,
.training-section {
    position: relative;
    padding: 4rem 0;  /* 只保留最小高度设置 */
    overflow: hidden;
    min-height: 1000px;  /* 只保留最小高度设置 */
}

.interview-section .section-bg,
.simulation-section .section-bg,
.training-section .section-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
}

.interview-section .bg-line,
.simulation-section .bg-line,
.training-section .bg-line {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    max-width: 100%;
}

/* 确保section有相对定位以容纳背景 */
.interview-section,
.simulation-section,
.training-section {
    position: relative;
    width: 100%;
    overflow: hidden;
}

.section-title {
    text-align: center;
    font-size: 50px;
    font-weight: bold;
    margin-bottom: 1rem;
}

.section-content {
    max-width: 1300px;
    margin: 0 auto;
    padding: 30px 0 0;  /* 增加上下内边距 */
}

.desc-text {
    text-align: center;
    margin-bottom: 20px;
    padding: 0 20px;
}

.desc-text p {
    margin: 0.5rem 0;  /* 增加段落间距 */
    color: #4B5563;
    font-size: 1.1rem;
    line-height: 1.8;  /* 增加行高 */
}

/* 视频容器添加背景 */
.demo-container {
    position: relative;
    width: 100%;
    max-width: 1300px;
    margin: 0 auto 0;  /* 增加上边距 */
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 20px;
    padding: 20px;
}

/* 视频背景框 */
.video-wrapper {
    position: relative;
    padding: 20px;
    background: rgb(210, 227, 252);
    border-radius: 20px;
    margin: 0 auto;
}

/* 视频样式统一 */
.demo-video {
    width: auto;
    height: 422px;
    border-radius: 12px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    object-fit: cover;
    display: block;
}

/* 描述图片样式统一 */
.desc-left,
.desc-right {
    width: 280px;
    height: auto;
}

/* 底部描述图片位置调整 */
.desc-bottom {
    position: absolute;
    bottom: -115px;
    left: 50%;
    transform: translateX(-51%);
    width: auto;
    height: 110px;
    z-index: 2;
}

/* 渐变效果统一使用伪元素 */
.interview-section::before,
.simulation-section::before,
.training-section::before,
.features-section::before,
.faq-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, rgba(245, 248, 255, 0.5) 0%, rgba(245, 248, 255, 1) 100%);
    z-index: 0;
}

/* 确保section内容在渐变层之上 */
.section-content {
    position: relative;
    z-index: 1;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0;
}

/* AI面试训练部分 */
.training-section {
    position: relative;
    padding: 80px 0;
    overflow: hidden;
}

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

.training-section .section-title {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 32px;
}

.training-section .title-icon {
    width: 48px;
    height: 48px;
}

.training-section .title-text {
    font-size: 36px;
    font-weight: bold;
    color: #1F2937;
}

.training-section .desc-text {
    max-width: 1000px;
    margin: 0 auto 20px;
    text-align: center;
    font-size: 18px;
    line-height: 1.8;
    color: #4B5563;
}

.training-section .desc-text p {
    margin: 12px 0;
}

.training-section .demo-container {
    position: relative;
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: center;
    align-items: center;
}

.training-section .desc-left,
.training-section .desc-right {
    position: absolute;
    max-width: 300px;
    z-index: 1;
}

.training-section .desc-left {
    left: 0;
    transform: translateX(-40%);
}

.training-section .desc-right {
    right: 0;
    transform: translateX(40%);
}

.training-section .video-wrapper {
    position: relative;
    width: 100%;
    max-width: 800px;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

.training-section .demo-video {
    width: 100%;
    height: auto;
    display: block;
}

.training-section .desc-bottom {
    position: absolute;
    bottom: -20px;
    left: 50%;
    transform: translateX(-50%);
    max-width: 200px;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .hero-section {
        padding: 2rem 1rem;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .software-grid {
        grid-template-columns: 1fr;
    }
    
    .software-list {
        grid-template-columns: repeat(auto-fit, minmax(80px, 1fr));
    }
    
    .advantages-grid {
        grid-template-columns: 1fr;
        padding: 1rem;
    }
    
    .feature-tag {
        position: static;
        margin: 1rem 0;
    }
    
    .feature-tags {
        position: static;
        flex-direction: column;
        align-items: center;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .faq-container {
        padding: 0 1rem;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.75rem;
    }
    
    .button-group {
        flex-direction: column;
        gap: 1rem;
    }
    
    .button {
        width: 100%;
    }
    
    .software-item img {
        height: 24px;
    }
}

@media (max-width: 768px) {
    .demo-container {
        flex-direction: column;
        gap: 1rem;
    }

    .demo-video {
        width: 100%;
    }

    .desc-left, .desc-right {
        width: 50%;
        max-width: 150px;
    }

    .desc-bottom {
        width: 100%;
        bottom: -1rem;
    }

    .desc-text p {
        font-size: 1rem;
    }
}

@media (max-width: 768px) {
    .features-grid {
        grid-template-columns: 1fr;
        padding: 1rem;
    }
    
    .feature-card {
        padding: 1.5rem;
    }
}

@media screen and (max-width: 768px) {
    .hero-title .ai-logo {
        width: 100px;
        top: 10px;
        left: 5px;
    }
}

.features-section .section-title,
.faq-section .section-title {
    font-size: 50px;
    margin-bottom: 1.5rem;
}

.interview-section .section-title,
.simulation-section .section-title,
.features-section .section-title,
.faq-section .section-title {
    font-size: 50px;
}

.interview-section,
.simulation-section {
    .section-title {
        font-size: 50px;
    }
}

/* 统一section标题样式 */
.interview-section .section-title,
.simulation-section .section-title,
.training-section .section-title {
    position: relative;
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    margin-bottom: 1.5rem;
    padding: 0;
    gap: 16px;
}

/* 统一图标样式 */
.interview-section .title-icon,
.simulation-section .title-icon,
.training-section .title-icon {
    width: 70px;
    height: 70px;
    margin: 0;
    padding: 0;
    display: block;
}

/* 统一标题文字样式 */
.interview-section .title-text,
.simulation-section .title-text,
.training-section .title-text {
    font-size: 50px;
    font-weight: bold;
    color: #1F2937;
    margin: 0;
    padding: 0;
    line-height: 1;
    display: block;
}

/* 移除可能造成冲突的样式 */
.section-title {
    position: relative;
    z-index: 2;
}

/* 确保其他部分的标题不受影响 */
.features-section .section-title,
.faq-section .section-title {
    font-size: 50px;
    font-weight: bold;
    margin-bottom: 1.5rem;
    text-align: center;
}

/* 视频弹窗样式 */
.video-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
    z-index: 1000;
}

.video-modal.active {
    display: flex;
    justify-content: center;
    align-items: center;
}

.modal-content {
    background: white;
    border-radius: 12px;
    width: 90%;
    max-width: 900px;
    position: relative;
    animation: modalFadeIn 0.3s ease-out;
}

.modal-header {
    padding: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid #eee;
}

.modal-header h3 {
    margin: 0;
    color: #1a1a1a;
    font-size: 20px;
}

.close-button {
    background: none;
    border: none;
    font-size: 28px;
    cursor: pointer;
    color: #666;
    padding: 0 8px;
    transition: color 0.2s;
}

.close-button:hover {
    color: #000;
}

.modal-body {
    padding: 20px;
}

.modal-body video {
    display: block;
    width: 100%;
    max-height: 80vh;
    border-radius: 8px;
    background: #000;
}

/* 自定义视频控制器样式 */
video::-webkit-media-controls {
    border-radius: 0 0 8px 8px;
}

video::-webkit-media-controls-panel {
    padding: 0 10px;
}

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