/* ==================== 全局样式 ==================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Microsoft Yahei", sans-serif;
}
html { scroll-behavior: smooth; }
body { color: #333; background-color: #fff; overflow-x: hidden; }
.section-title {
    text-align: center;
    margin-bottom: 60px;
}
.section-title h2 {
    font-size: 36px;
    color: #2c3e50;
    margin-bottom: 15px;
    font-weight: 700;
}
.section-title p {
    font-size: 16px;
    color: #7f8c8d;
    line-height: 1.6;
}
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease;
}
.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* ==================== 导航栏样式 ==================== */
.header-nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 999;
    background-color: rgba(44, 62, 80, 0.95);
    padding: 15px 0;
}
.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 20px;
}
.logo img { height: 50px; }
.nav-menu {
    display: flex;
    list-style: none;
}
.nav-menu li { margin-left: 30px; }
.nav-menu li a {
    color: #fff;
    text-decoration: none;
    font-size: 16px;
    font-weight: 500;
    transition: color 0.3s ease;
}
.nav-menu li a:hover,
.nav-menu li a.active {
    color: #3498db;
}
.mobile-nav-btn {
    display: none;
    color: #fff;
    font-size: 24px;
    cursor: pointer;
}

/* ==================== 英雄区样式 ==================== */
.hero-section {
    height: 100vh;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #2D9EFF 0%, #6BB8FF 100%);
    overflow: hidden;
}
#particles-js {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}
.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: #fff;
    padding: 0 20px;
}
.hero-title {
    font-size: 48px;
    line-height: 1.2;
    margin-bottom: 20px;
    font-weight: 700;
}
.hero-subtitle {
    font-size: 18px;
    margin-bottom: 40px;
    line-height: 1.6;
    opacity: 0.9;
}
.hero-btn {
    display: inline-block;
    padding: 15px 40px;
    background-color: #3498db;
    color: #fff;
    text-decoration: none;
    border-radius: 50px;
    font-size: 18px;
    font-weight: 600;
    transition: all 0.3s ease;
}
.hero-btn:hover {
    background-color: #2980b9;
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

/* ==================== 关于同芯启程 · 品牌基因 ==================== */
.about-brand-section {
    padding: 80px 20px;
    max-width: 1300px;
    margin: 0 auto;
    background: linear-gradient(to bottom, #ffffff, #f8fafc);
}

.about-brand-container {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 50px;
    align-items: start;
}

.about-text-area {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.about-intro h3,
.about-advantages h3,
.about-goal h3 {
    font-size: 22px;
    color: #2c3e50;
    margin-bottom: 18px;
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
}

.about-intro h3 i,
.about-advantages h3 i,
.about-goal h3 i {
    color: #3498db;
    font-size: 26px;
}

.about-intro p,
.about-goal p {
    font-size: 16px;
    line-height: 1.8;
    color: #4a5568;
    margin-bottom: 5px;
}

.advantage-list {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 15px 20px;
}

.advantage-list li {
    font-size: 15px;
    color: #2c3e50;
    display: flex;
    align-items: flex-start;
    gap: 8px;
}

.advantage-list li i {
    color: #27ae60;
    font-size: 18px;
    margin-top: 3px;
    flex-shrink: 0;
}

.about-payment {
    margin-top: 10px;
}

.payment-badge {
    background: linear-gradient(135deg, #e8f4f8 0%, #d4eaf0 100%);
    padding: 15px 20px;
    border-radius: 12px;
    display: inline-flex;
    align-items: center;
    gap: 12px;
    border-left: 5px solid #3498db;
}

.payment-badge i {
    font-size: 28px;
    color: #2c3e50;
}

.payment-badge span {
    font-size: 16px;
    font-weight: 600;
    color: #1e4660;
}

/* 右侧图片区 */
.brand-images-area {
    background: #fff;
    border-radius: 24px;
    padding: 25px;
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.05);
}

.brand-grid-vertical {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.brand-card-vertical {
    text-align: center;
    background: #fafbfc;
    border-radius: 18px;
    padding: 20px 15px 15px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid #edf2f7;
}

.brand-card-vertical:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 25px rgba(52, 152, 219, 0.1);
}

.brand-card-img {
    width: 100%;
    height: 120px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 15px;
}

.brand-card-img img {
    max-width: 100%;
    max-height: 120px;
    object-fit: contain;
    border-radius: 8px;
    cursor: zoom-in;
}

.brand-card-vertical h4 {
    font-size: 17px;
    color: #2c3e50;
    margin-bottom: 8px;
    font-weight: 700;
}

.brand-card-vertical p {
    font-size: 13px;
    color: #64748b;
    line-height: 1.4;
    margin: 0;
}

/* ==================== 课程体系样式 ==================== */
.courses-section, .advantages-section {
    padding: 100px 20px;
    max-width: 1200px;
    margin: 0 auto;
}
.courses-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}
.course-card {
    background-color: #fff;
    border-radius: 16px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: flex;
    flex-direction: column;
    height: 100%;
}
.course-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 15px 35px rgba(52, 152, 219, 0.12);
}
.course-img img {
    width: 100%;
    height: 220px;
    object-fit: cover;
    object-position: center;
}
#teachers .course-img img {
    width: 100%;
    height: auto;
    aspect-ratio: 4/3;
    object-fit: cover;
    object-position: top center;
}
.course-content {
    padding: 25px 25px 30px;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}
.course-tag {
    display: inline-block;
    padding: 5px 15px;
    background: linear-gradient(135deg, #3498db 0%, #2980b9 100%);
    color: #fff;
    border-radius: 50px;
    font-size: 13px;
    font-weight: 500;
    margin-bottom: 15px;
    align-self: flex-start;
}
.course-content h3 {
    font-size: 22px;
    color: #2c3e50;
    margin-bottom: 12px;
    font-weight: 700;
}
.course-desc {
    font-size: 15px;
    line-height: 1.7;
    color: #4a5568;
    margin-bottom: 20px;
    flex-grow: 1;
}
.course-highlights {
    display: flex;
    flex-wrap: wrap;
    gap: 12px 18px;
    padding-top: 15px;
    border-top: 1px dashed #e2e8f0;
}
.highlight-item {
    font-size: 13px;
    color: #2c3e50;
    display: flex;
    align-items: center;
    gap: 6px;
}
.highlight-item i {
    color: #27ae60;
    font-size: 14px;
}
.course-features { list-style: none; }
.course-features li {
    font-size: 15px;
    color: #555;
    margin-bottom: 10px;
    display: flex;
    align-items: flex-start;
}
.course-features li i {
    color: #3498db;
    margin-right: 10px;
    margin-top: 5px;
}

/* ==================== 教学特色样式 ==================== */
.advantages-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}
.advantage-item {
    text-align: center;
    padding: 40px 20px;
    background-color: #fff;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s ease;
}
.advantage-item:hover { transform: translateY(-5px); }
.advantage-icon {
    font-size: 48px;
    color: #3498db;
    margin-bottom: 20px;
}
.advantage-item h3 {
    font-size: 20px;
    color: #2c3e50;
    margin-bottom: 15px;
    font-weight: 600;
}
.advantage-item p {
    font-size: 15px;
    line-height: 1.6;
    color: #7f8c8d;
}

/* ==================== 赛事轮播样式 ==================== */
.events-carousel-container {
    max-width: 1200px;
    margin: 0 auto 50px;
    padding: 0 20px;
}
.carousel-wrapper {
    position: relative;
    border-radius: 24px;
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}
.carousel-slides {
    display: flex;
    transition: transform 0.5s ease;
    height: 480px;
}
.carousel-slide {
    min-width: 100%;
    height: 100%;
}
.carousel-slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}
.carousel-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.8);
    border: none;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 28px;
    color: #2c3e50;
    backdrop-filter: blur(4px);
    transition: all 0.3s ease;
    z-index: 10;
}
.carousel-btn:hover {
    background: #3498db;
    color: #fff;
}
.carousel-btn.prev {
    left: 20px;
}
.carousel-btn.next {
    right: 20px;
}
.carousel-dots {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 12px;
    z-index: 10;
}
.carousel-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.6);
    border: 2px solid transparent;
    cursor: pointer;
    transition: all 0.3s ease;
}
.carousel-dot.active {
    background: #3498db;
    transform: scale(1.3);
    border-color: #fff;
}

/* ==================== 赛事与等级测评板块样式 ==================== */
.events-category-container {
    display: flex;
    flex-direction: column;
    gap: 50px;
}
.events-category {
    background: #fff;
    border-radius: 20px;
    padding: 35px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.05);
}
.category-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 15px;
    flex-wrap: wrap;
}
.category-header i {
    font-size: 32px;
    color: #3498db;
}
.category-header h3 {
    font-size: 26px;
    color: #2c3e50;
    font-weight: 700;
    margin: 0;
}
.category-badge {
    background: linear-gradient(135deg, #e8f4f8 0%, #d4eaf0 100%);
    padding: 5px 15px;
    border-radius: 30px;
    font-size: 13px;
    font-weight: 600;
    color: #1e4660;
    margin-left: 5px;
}
.category-intro {
    font-size: 15px;
    color: #64748b;
    margin-bottom: 25px;
    padding-bottom: 15px;
    border-bottom: 1px solid #eef2f6;
}
.events-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 20px;
}
.event-card {
    background: #fafbfc;
    border-radius: 16px;
    padding: 20px;
    display: flex;
    gap: 15px;
    transition: all 0.3s ease;
    border: 1px solid #edf2f7;
}
.event-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(52, 152, 219, 0.1);
    border-color: #3498db;
}
.event-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #3498db 0%, #2980b9 100%);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}
.event-icon i {
    font-size: 24px;
    color: #fff;
}
.event-content {
    flex: 1;
}
.event-content h4 {
    font-size: 17px;
    color: #2c3e50;
    font-weight: 700;
    margin-bottom: 6px;
    line-height: 1.3;
}
.event-suit {
    display: inline-block;
    font-size: 12px;
    color: #3498db;
    background: #e8f4f8;
    padding: 3px 10px;
    border-radius: 20px;
    margin-bottom: 10px;
    font-weight: 500;
}
.event-content p {
    font-size: 14px;
    line-height: 1.6;
    color: #4a5568;
    margin-bottom: 12px;
}
.event-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}
.event-tags .tag {
    background: #eef2f6;
    color: #64748b;
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 11px;
    font-weight: 500;
}

/* 更多集锦链接 */
.more-gallery-link {
    text-align: center;
    margin-top: 50px;
}
.gallery-btn {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    background: linear-gradient(135deg, #2c3e50 0%, #1a252f 100%);
    color: #fff;
    padding: 16px 36px;
    border-radius: 60px;
    font-size: 18px;
    font-weight: 600;
    text-decoration: none;
    box-shadow: 0 10px 25px rgba(44, 62, 80, 0.3);
    transition: all 0.3s ease;
}
.gallery-btn i {
    font-size: 22px;
}
.gallery-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 35px rgba(52, 152, 219, 0.4);
    background: linear-gradient(135deg, #3498db 0%, #2980b9 100%);
    color: #fff;
}
/* ==================== 右下角悬浮联系按钮样式（优化版） ==================== */
.floating-contact {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
}
.floating-menu {
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.floating-item {
    display: flex;
    align-items: center;
    gap: 12px;
    background: #fff;
    border-radius: 50px;
    padding: 10px 18px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.12);
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
}
.floating-item:hover {
    transform: translateX(-8px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.18);
}
.floating-icon {
    width: 42px;
    height: 42px;
    background: linear-gradient(135deg, #3498db 0%, #2980b9 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}
.floating-icon i { font-size: 20px; color: #fff; }
.floating-content { display: flex; flex-direction: column; }
.floating-title { font-size: 14px; font-weight: 600; color: #2c3e50; }
.floating-detail {
    position: absolute;
    right: 100%;
    bottom: 0;
    background: #fff;
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.18);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    min-width: 360px;
    margin-right: 15px;
    z-index: 9999;
    max-width: calc(100vw - 80px);
    left: auto;
}
.floating-item:hover .floating-detail,
.floating-detail:hover {
    opacity: 1;
    visibility: visible;
}
.form-close {
    position: absolute;
    top: 15px;
    right: 15px;
    cursor: pointer;
    color: #7f8c8d;
}
.form-close:hover { color: #e74c3c; }
.phone-detail {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    min-width: 280px;
}
.phone-number {
    font-size: 24px;
    font-weight: 700;
    color: #3498db;
    text-decoration: none;
}
.qrcode-detail {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    min-width: 280px;
}
.qrcode-detail img {
    width: 160px;
    height: 160px;
    border-radius: 8px;
}
.form-detail {
    min-width: 360px;
    padding: 25px;
    max-height: 80vh;
    overflow-y: auto;
}
.required { color: #e74c3c; }
.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 12px;
}
.form-group { margin-bottom: 15px; }
.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #2c3e50;
}
.form-control {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid #dcdfe6;
    border-radius: 8px;
    font-size: 14px;
}
.form-control:focus {
    outline: none;
    border-color: #3498db;
}
.form-btn {
    width: 100%;
    padding: 12px;
    background-color: #3498db;
    color: #fff;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
}
.form-btn:hover { background-color: #2980b9; }

/* 移动端弹窗位置优化 */
@media (max-width: 768px) {
    .floating-detail {
        right: 0;
        bottom: 100%;
        margin-right: 0;
        margin-bottom: 15px;
        min-width: 300px;
    }
    .form-detail {
        min-width: 300px;
    }
    .form-row {
        grid-template-columns: 1fr;
    }
}

/* ==================== 表单关闭状态修复 ==================== */
.floating-item.form-closed .floating-detail {
    opacity: 0 !important;
    visibility: hidden !important;
    pointer-events: none;
}
.floating-item:not(.form-closed):hover .floating-detail,
.floating-detail:hover {
    opacity: 1;
    visibility: visible;
}

/* ==================== Lightbox 图片预览样式 ==================== */
.lightbox-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.9);
    z-index: 99999;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: zoom-out;
}
.lightbox-content {
    max-width: 90vw;
    max-height: 90vh;
}
.lightbox-content img {
    max-width: 100%;
    max-height: 90vh;
    object-fit: contain;
    border-radius: 12px;
    box-shadow: 0 0 40px rgba(0,0,0,0.5);
}
.lightbox-close {
    position: absolute;
    top: 20px;
    right: 30px;
    font-size: 44px;
    color: #fff;
    cursor: pointer;
    background: rgba(0,0,0,0.5);
    width: 55px;
    height: 55px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s;
}
.lightbox-close:hover {
    background: rgba(231, 76, 60, 0.9);
}

/* ==================== 页脚样式（优化版，无地图） ==================== */
.footer {
    background-color: #233142;
    color: #f0f4f8;
    padding: 55px 20px 35px;
}

.footer-container {
    max-width: 1180px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 2fr 1.2fr 1.2fr 1.5fr;
    gap: 45px;
    align-items: flex-start;
    margin-bottom: 50px;
}

.footer-logo img { 
    height: 58px; 
    margin-bottom: 18px; 
}
.footer-logo p {
    font-size: 15px;
    line-height: 1.7;
    opacity: 0.82;
    max-width: 230px;
    letter-spacing: 0.5px;
}

.footer-links h4 { 
    font-size: 19px; 
    margin-bottom: 22px;
    font-weight: 700;
    position: relative;
    padding-bottom: 8px;
}
.footer-links h4::after{
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 40px;
    height: 2px;
    background: #40a9ff;
    border-radius: 1px;
}

.footer-links ul { 
    list-style: none;
    padding-left: 0;
    margin: 0;
}
.footer-links li { 
    margin-bottom: 12px;
}
.footer-links a {
    color: #e5edf5;
    text-decoration: none;
    font-size: 15px;
    opacity: 0.78;
    transition: all 0.3s ease;
}
.footer-links a:hover { 
    opacity: 1;
    color: #40a9ff;
    transform: translateX(4px);
}

/* 联系我们列 */
.footer-contact-col h4 {
    font-size: 19px;
    margin-bottom: 22px;
    font-weight: 700;
    position: relative;
    padding-bottom: 8px;
}
.footer-contact-col h4::after{
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 40px;
    height: 2px;
    background: #40a9ff;
    border-radius: 1px;
}
.footer-contact-col p {
    font-size: 15px;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 10px;
    opacity: 0.9;
}
.footer-contact-col i {
    font-size: 17px;
    color: #40a9ff;
    width: 22px;
    text-align: center;
}
.footer-contact-col a {
    color: inherit;
    text-decoration: none;
    transition: opacity 0.3s;
}
.footer-contact-col a:hover {
    opacity: 0.7;
}

/* 底部备案版权栏 */
.footer-bottom {
    text-align: center;
    padding-top: 25px;
    border-top: 1px solid rgba(255, 255, 255, 0.12);
    font-size: 14px;
    line-height: 1.8;
    opacity: 0.8;
}

/* 响应式 */
@media (max-width: 1200px) {
    .footer-container {
        grid-template-columns: repeat(2, 1fr);
        gap: 40px 30px;
    }
}

@media (max-width: 768px) {
    .footer-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 35px;
    }
    .footer-links h4::after,
    .footer-contact-col h4::after {
        left: 50%;
        transform: translateX(-50%);
    }
    .footer-logo p {
        max-width: 100%;
        margin: 0 auto;
    }
    .footer-contact-col p {
        justify-content: center;
    }
}

/* 其他响应式保持不变 */
@media (max-width: 992px) {
    .nav-menu {
        position: fixed;
        top: 0;
        right: -240px;
        width: 240px;
        height: 100vh;
        background-color: #2c3e50;
        flex-direction: column;
        padding: 80px 20px;
        transition: right 0.3s ease;
    }
    .nav-menu.active { right: 0; }
    .nav-menu li { margin: 15px 0; }
    .mobile-nav-btn { display: block; }
}

@media (max-width: 768px) {
    .section-title h2 { font-size: 28px; }
    .hero-title { font-size: 30px; }
    .courses-container { grid-template-columns: 1fr; }
    .advantages-container { grid-template-columns: 1fr; }
    .advantage-list { grid-template-columns: 1fr; }
    .brand-grid-vertical { grid-template-columns: repeat(2, 1fr); }
    .events-category { padding: 25px 20px; }
    .category-header h3 { font-size: 22px; }
    .event-card { flex-direction: column; }
}

@media (max-width: 576px) {
    .hero-title { font-size: 24px; }
    .brand-grid-vertical { grid-template-columns: 1fr; }
}

/* ==================== 视频弹窗样式 ==================== */
.video-modal {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0,0,0,0.95);
    z-index: 99999;
    display: flex;
    align-items: center;
    justify-content: center;
}
.video-modal video {
    max-width: 90%;
    max-height: 80vh;
    border-radius: 12px;
    box-shadow: 0 0 30px rgba(0,0,0,0.5);
}
.video-modal-close {
    position: absolute;
    top: 20px; right: 30px;
    font-size: 40px;
    color: #fff;
    cursor: pointer;
    z-index: 100000;
    background: rgba(0,0,0,0.5);
    width: 50px; height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.3s;
}
.video-modal-close:hover {
    background: rgba(231,76,60,0.8);
}