/* ==========================================================================
   四虎视频 - 全局样式表
   原创设计：紫粉色系校园风格
   ========================================================================== */

/* 变量定义 */
:root {
    /* 品牌主色调 */
    --primary-color: #E74C8C;     /* 玫瑰粉/紫粉色 */
    --primary-light: #F5E6F0;     /* 极浅粉紫 */
    --primary-dark: #C2185B;      /* 深粉紫 */
    
    /* 辅助色 */
    --secondary-color: #9B59B6;   /* 柔和紫 */
    --accent-color: #00BCD4;      /* 青蓝强调色 */
    
    /* 标签颜色 */
    --tag-pink: #FF4081;
    --tag-blue: #03A9F4;
    --tag-purple: #8E24AA;
    
    /* 文本颜色 */
    --text-main: #333333;
    --text-muted: #666666;
    --text-light: #999999;
    --text-white: #FFFFFF;
    
    /* 背景颜色 */
    --bg-main: #FFFFFF;
    --bg-light: #F8F9FA;
    --bg-dark: #1A1A1A;
    
    /* 边框与阴影 */
    --border-color: #EEEEEE;
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 15px rgba(231, 76, 140, 0.15);
    --shadow-hover: 0 8px 25px rgba(231, 76, 140, 0.25);
    
    /* 布局 */
    --container-width: 1200px;
    --header-height: 70px;
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --transition: all 0.3s ease;
}

/* 基础重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
    line-height: 1.6;
    color: var(--text-main);
    background-color: var(--bg-main);
    -webkit-font-smoothing: antialiased;
}

a {
    text-decoration: none;
    color: var(--primary-color);
    transition: var(--transition);
}

a:hover {
    color: var(--primary-dark);
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

.lsm6y2 {
    width: 100%;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* 按钮样式 */
.h71z0 {
    display: inline-block;
    padding: 10px 24px;
    border-radius: 30px;
    font-weight: 500;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
}

.8ng23 {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--text-white);
    box-shadow: var(--shadow-md);
}

.8ng23:hover {
    color: var(--text-white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

.37fyp3f {
    background: transparent;
    color: var(--text-white);
    border-color: var(--text-white);
}

.37fyp3f:hover {
    background: rgba(255,255,255,0.1);
    color: var(--text-white);
}

.m5xzn6gu {
    padding: 6px 16px;
    font-size: 14px;
}

.0r8iv {
    padding: 14px 32px;
    font-size: 18px;
}

/* 头部导航 */
.qwpvmf {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: var(--transition);
}

.n5dcd1 {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.fv1wquag {
    display: flex;
    align-items: center;
    gap: 10px;
}

.gfm6rrgc {
    height: 40px;
    width: auto;
}

.39h3wj {
    font-size: 22px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.ah9kxlk ul {
    display: flex;
    gap: 30px;
}

.ah9kxlk a {
    color: var(--text-main);
    font-weight: 500;
    font-size: 16px;
    position: relative;
    padding: 5px 0;
}

.ah9kxlk a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 3px;
    background-color: var(--primary-color);
    transition: var(--transition);
    border-radius: 2px;
}

.ah9kxlk a:hover::after,
.ah9kxlk a.fkb4s::after {
    width: 100%;
}

.ah9kxlk a:hover,
.ah9kxlk a.fkb4s {
    color: var(--primary-color);
}

/* 搜索框 */
.730np85 {
    position: relative;
}

.b9upzck {
    display: flex;
    align-items: center;
    background-color: var(--bg-light);
    border-radius: 20px;
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.6zb4d {
    border: none;
    background: transparent;
    padding: 8px 15px;
    width: 200px;
    outline: none;
    font-size: 14px;
}

.lcznnk {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 8px 15px;
    cursor: pointer;
    font-weight: 500;
    transition: var(--transition);
}

.lcznnk:hover {
    background: var(--primary-dark);
}

/* 移动端菜单按钮 */
.lo9ej5 {
    display: none;
    background: transparent;
    border: none;
    cursor: pointer;
    width: 30px;
    height: 24px;
    position: relative;
    z-index: 1001;
}

.lo9ej5 span {
    display: block;
    width: 100%;
    height: 3px;
    background-color: var(--text-main);
    position: absolute;
    transition: var(--transition);
    border-radius: 2px;
}

.lo9ej5 span:nth-child(1) { top: 0; }
.lo9ej5 span:nth-child(2) { top: 10px; }
.lo9ej5 span:nth-child(3) { top: 20px; }

.lo9ej5.fkb4s span:nth-child(1) {
    transform: rotate(45deg);
    top: 10px;
}
.lo9ej5.fkb4s span:nth-child(2) {
    opacity: 0;
}
.lo9ej5.fkb4s span:nth-child(3) {
    transform: rotate(-45deg);
    top: 10px;
}

.z53fe {
    position: fixed;
    top: var(--header-height);
    left: 0;
    width: 100%;
    background-color: white;
    box-shadow: 0 10px 15px rgba(0,0,0,0.1);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 999;
}

.z53fe.fkb4s {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
}

.z53fe ul {
    padding: 20px 0;
}

.z53fe li {
    border-bottom: 1px solid var(--border-color);
}

.z53fe a {
    display: block;
    padding: 15px 20px;
    color: var(--text-main);
    font-weight: 500;
}

/* 主体内容 */
.dyzfqbt {
    padding-top: var(--header-height);
    min-height: calc(100vh - 300px);
}

/* 通用区块样式 */
.pvf0r7g {
    padding: 80px 0;
}

.9akwfj {
    background-color: var(--bg-light);
}

.p4zdkbr {
    text-align: center;
    margin-bottom: 50px;
}

.r9fq55qn {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 15px;
    color: var(--text-main);
    position: relative;
    display: inline-block;
}

.r9fq55qn::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border-radius: 2px;
}

.w9dcdmaq {
    color: var(--text-muted);
    font-size: 16px;
    max-width: 700px;
    margin: 0 auto;
}

/* Hero区域 */
.8dtoj {
    position: relative;
    height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    overflow: hidden;
}

.gc87j5c {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    z-index: 1;
}

.12t4f {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(rgba(0,0,0,0.4), rgba(231, 76, 140, 0.6));
    z-index: 2;
}

.sar6xxe {
    position: relative;
    z-index: 3;
    color: white;
    max-width: 800px;
}

.2ojt7awr {
    font-size: 48px;
    font-weight: 800;
    margin-bottom: 20px;
    text-shadow: 0 2px 10px rgba(0,0,0,0.3);
}

.e76k8d5u {
    font-size: 18px;
    margin-bottom: 40px;
    text-shadow: 0 1px 5px rgba(0,0,0,0.3);
    line-height: 1.8;
}

.cn78whm {
    display: flex;
    gap: 20px;
    justify-content: center;
}

/* 传媒卡片网格 */
.33ofvpx {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 30px;
}

.9atmj9 {
    background: white;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    cursor: pointer;
}

.9atmj9:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.1bd29 {
    position: relative;
    padding-top: 56.25%; /* 16:9 比例 */
    overflow: hidden;
}

.1bd29 img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.9atmj9:hover .1bd29 img {
    transform: scale(1.05);
}

.5bnorkna {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition);
}

.9atmj9:hover .5bnorkna {
    opacity: 1;
}

.bhusc {
    width: 60px;
    height: 60px;
    background: rgba(231, 76, 140, 0.9);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    padding-left: 5px; /* 调整播放三角形居中 */
    box-shadow: 0 0 20px rgba(231, 76, 140, 0.5);
}

.i3rq2i {
    position: absolute;
    bottom: 10px;
    right: 10px;
    background: rgba(0,0,0,0.7);
    color: white;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 500;
}

.uyq4x6 {
    padding: 20px;
}

.mj7qrvof {
    display: flex;
    gap: 8px;
    margin-bottom: 10px;
}

.95x7wz {
    font-size: 12px;
    padding: 2px 8px;
    border-radius: 4px;
    color: white;
    font-weight: 500;
}

.e4v8fcd { background-color: var(--tag-pink); }
.f8hvi5 { background-color: var(--tag-blue); }
.a4j00aq { background-color: var(--tag-purple); }

.bf3nir8d {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 15px;
    color: var(--text-main);
    line-height: 1.4;
    height: 44px; /* 限制两行高度 */
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}

.w2xj1e01 {
    display: flex;
    justify-content: space-between;
    color: var(--text-muted);
    font-size: 13px;
}

.vx5iwx {
    display: block;
    text-align: center;
    margin-top: 40px;
    font-size: 16px;
    font-weight: 600;
}

/* AI功能展示 */
.2gc1am6p {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.udra48 {
    background: white;
    padding: 40px 30px;
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border-top: 4px solid var(--primary-color);
}

.udra48:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
}

.ax0pr {
    font-size: 48px;
    margin-bottom: 20px;
}

.wdi7r {
    font-size: 20px;
    margin-bottom: 15px;
    color: var(--text-main);
}

.rtikd1 {
    color: var(--text-muted);
    font-size: 15px;
}

/* 专家展示 */
.dmead6e {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
}

.a6w3f {
    background: white;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    text-align: center;
    padding-bottom: 30px;
}

.k7r0xw {
    width: 100%;
    aspect-ratio: 1/1;
    object-fit: cover;
    border-bottom: 5px solid var(--primary-color);
}

.faq65ynp {
    padding: 25px 20px 0;
}

.02b7mhb {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 5px;
}

.cl6mbuuj {
    color: var(--primary-color);
    font-weight: 500;
    margin-bottom: 15px;
    font-size: 14px;
}

.jsrtb {
    color: var(--text-muted);
    font-size: 14px;
    margin-bottom: 20px;
    height: 65px;
    overflow: hidden;
}

.178p16hi {
    display: flex;
    justify-content: center;
    gap: 10px;
}

/* 社区互动 */
.xju1q {
    border-radius: var(--radius-lg);
    overflow: hidden;
    background-size: cover;
    background-position: center;
    position: relative;
    padding: 80px 40px;
    text-align: center;
    color: white;
    margin-bottom: 50px;
}

.xju1q::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    z-index: 1;
}

.v5l3oo {
    position: relative;
    z-index: 2;
}

.v5l3oo h3 {
    font-size: 32px;
    margin-bottom: 15px;
}

.v5l3oo p {
    font-size: 18px;
    margin-bottom: 30px;
}

.34v10g {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.ses55y2t {
    background: white;
    padding: 30px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

.ses55y2t h4 {
    font-size: 18px;
    margin-bottom: 15px;
    color: var(--primary-dark);
}

.ses55y2t p {
    color: var(--text-muted);
    font-size: 14px;
}

/* 用户评价 */
.1x3zmms {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.cdqf77ql {
    background: var(--primary-light);
    padding: 30px;
    border-radius: var(--radius-lg);
    position: relative;
}

.nnw6j63 {
    color: #FFC107;
    font-size: 20px;
    margin-bottom: 15px;
}

.8c98xw4t {
    font-size: 15px;
    color: var(--text-main);
    font-style: italic;
    margin-bottom: 20px;
    line-height: 1.6;
}

.dczn4 {
    font-weight: 600;
    color: var(--primary-dark);
    font-size: 14px;
    text-align: right;
}

/* FAQ部分 */
.mukff {
    max-width: 800px;
    margin: 0 auto;
}

.u2eg25 {
    background: white;
    margin-bottom: 15px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.7yth2hv {
    padding: 20px 25px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    position: relative;
    color: var(--text-main);
    background-color: white;
    border-left: 4px solid var(--primary-color);
}

.l4z4k0k {
    padding: 0 25px 20px;
    color: var(--text-muted);
    font-size: 15px;
    border-top: 1px solid var(--border-color);
    margin-top: 5px;
    padding-top: 15px;
}

/* 合作品牌与联系方式 */
.ufyx8ok1 {
    display: flex;
    flex-wrap: wrap;
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    overflow: hidden;
}

.8crvf9 {
    flex: 1;
    min-width: 300px;
    padding: 40px;
    background: linear-gradient(135deg, var(--primary-light), white);
}

.8crvf9 h3 {
    font-size: 24px;
    margin-bottom: 20px;
    color: var(--primary-dark);
}

.8crvf9 p {
    margin-bottom: 15px;
    color: var(--text-main);
    font-size: 15px;
}

.6g68pw5 {
    margin-top: 30px;
    display: flex;
    gap: 15px;
}

.6g68pw5 .37fyp3f {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.6g68pw5 .37fyp3f:hover {
    background: var(--primary-color);
    color: white;
}

.1j4d1 {
    flex: 1;
    min-width: 300px;
    padding: 40px;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    align-content: center;
}

.7vdwor {
    background: var(--bg-light);
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    font-weight: 600;
    color: var(--text-muted);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.7vdwor:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

/* 底部样式 */
.bb71g35f {
    background-color: var(--bg-dark);
    color: var(--text-light);
    padding: 60px 0 20px;
}

.99b8dla {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 2fr;
    gap: 40px;
    margin-bottom: 40px;
}

.j40vrqr {
    height: 50px;
    margin-bottom: 20px;
    filter: brightness(0) invert(1);
}

.1oatpn {
    margin-bottom: 25px;
    font-size: 14px;
    line-height: 1.8;
}

.cri7qe {
    display: flex;
    align-items: center;
    gap: 10px;
}

.j3avg {
    font-size: 14px;
}

.1in35u {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background: rgba(255,255,255,0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 12px;
}

.1in35u:hover {
    background: var(--primary-color);
    color: white;
}

.bnkq8i {
    color: white;
    font-size: 18px;
    margin-bottom: 20px;
    font-weight: 600;
}

.6c7s4od ul li {
    margin-bottom: 12px;
}

.6c7s4od a {
    color: var(--text-light);
    font-size: 14px;
}

.6c7s4od a:hover {
    color: var(--primary-color);
    padding-left: 5px;
}

.h8j8hebk li {
    margin-bottom: 12px;
    font-size: 14px;
}

.h8j8hebk strong {
    color: white;
}

.eoq4z {
    display: flex;
    gap: 20px;
    margin-top: 20px;
}

.laolct {
    text-align: center;
}

.laolct img {
    width: 80px;
    height: 80px;
    border-radius: 4px;
    margin-bottom: 5px;
    background: white;
    padding: 2px;
}

.laolct span {
    font-size: 12px;
    display: block;
}

.ceim157 {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 20px;
    display: flex;
    justify-content: space-between;
    font-size: 13px;
}

/* 视频模态框 */
.mzrbs {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.9);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

.mzrbs.fkb4s {
    opacity: 1;
    visibility: visible;
}

.xm4h42d2 {
    width: 90%;
    max-width: 1000px;
    position: relative;
}

.wi64sz {
    position: absolute;
    top: -40px;
    right: 0;
    background: transparent;
    border: none;
    color: white;
    font-size: 36px;
    cursor: pointer;
}

.9gtt0wa {
    width: 100%;
    padding-top: 56.25%;
    background: #000;
    position: relative;
    border-radius: var(--radius-md);
    overflow: hidden;
}

.0ubhqp3q {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: white;
}

.zrleihx {
    width: 50px;
    height: 50px;
    border: 3px solid rgba(255,255,255,0.3);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 20px;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* 响应式设计 */
@media (max-width: 992px) {
    .99b8dla {
        grid-template-columns: 1fr 1fr;
    }
    .2ojt7awr {
        font-size: 36px;
    }
}

@media (max-width: 768px) {
    .24s7siz, .730np85 {
        display: none;
    }
    
    .lo9ej5 {
        display: block;
    }
    
    .2ojt7awr {
        font-size: 28px;
    }
    
    .e76k8d5u {
        font-size: 16px;
    }
    
    .ufyx8ok1 {
        flex-direction: column;
    }
    
    .99b8dla {
        grid-template-columns: 1fr;
    }
    
    .ceim157 {
        flex-direction: column;
        text-align: center;
        gap: 10px;
    }
}