html {
    scroll-behavior: smooth;
}
:root {
    --primary-red: #e60012;
    --dark-grey: #333333;
    --light-grey: #f5f5f5;
    --border-color: #eeeeee;
    --white: #ffffff;
    --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
body {
    font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
    line-height: 1.5;
    color: var(--dark-grey);
    background-color: var(--white);
    -webkit-font-smoothing: antialiased;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}
a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}
ul {
    list-style: none;
}
img {
    max-width: 100%;
    display: block;
}
.header {
    background-color: var(--white);
    height: 90px;
    box-shadow: 0 2px 15px rgba(0,0,0,0.08);
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 2000;
    display: flex;
    align-items: center;
}
.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}
.logo {
    display: flex;
    align-items: center;
}
.logo-img {
    height: 40px;
    width: 40px;
    border-radius: 8px;
    margin-right: 12px;
    object-fit: cover;
}
.logo-info {
    display: flex;
    flex-direction: column;
    justify-content: center;
}
.logo-text {
    font-size: 24px;
    font-weight: 600;
    color: var(--primary-red);
    line-height: 1.1;
}
.logo-subtext {
    font-size: 11px;
    font-weight: 400;
    color: #666;
    letter-spacing: 0.2px;
}
.nav {
    display: flex;
    gap: 35px;
}
.nav-item {
    font-size: 16px;
    font-weight: 600;
    position: relative;
    padding: 10px 0;
}
.nav-item::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 3px;
    background-color: var(--primary-red);
    transition: var(--transition);
}
.nav-item:hover, .nav-item.active {
    color: var(--primary-red);
}
.nav-item:hover::after, .nav-item.active::after {
    width: 100%;
}
.header-right {
    display: flex;
    align-items: center;
    gap: 20px;
}
.phone-box {
    color: var(--primary-red);
    font-weight: 700;
    font-size: 18px;
    display: flex;
    align-items: center;
    gap: 8px;
    border: 2px solid var(--primary-red);
    padding: 6px 18px;
    border-radius: 50px;
}
.hero {
    margin-top: 90px;
    height: 600px;
    position: relative;
    overflow: hidden;
    color: var(--white);
    display: flex;
    align-items: center;
}
.slider-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}
.slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 1s ease-in-out;
    background-size: cover;
    background-position: center;
    cursor: pointer;
}
.slide.active {
    opacity: 1;
}
.slide::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(rgba(0,0,0,0.4), rgba(0,0,0,0.4));
    z-index: 2;
}
.hero-content {
    position: relative;
    z-index: 10;
    max-width: 700px;
    animation: fadeInUp 1s ease;
}
.slider-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    z-index: 15;
    background: rgba(255,255,255,0.2);
    color: white;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 24px;
    transition: var(--transition);
    border: none;
}
.slider-arrow:hover {
    background: var(--primary-red);
}
.arrow-left { left: 30px; }
.arrow-right { right: 30px; }
.slider-dots {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 15;
    display: flex;
    gap: 10px;
}
.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255,255,255,0.3);
    cursor: pointer;
    transition: var(--transition);
}
.dot.active {
    background: var(--primary-red);
    width: 30px;
    border-radius: 10px;
}
.page-banner {
    margin-top: 90px;
    height: 350px;
    background-size: cover;
    background-position: center;
    position: relative;
    display: flex;
    align-items: center;
    color: var(--white);
}
.page-banner::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(rgba(0,0,0,0.5), rgba(0,0,0,0.5));
    z-index: 1;
}
.page-banner .container {
    position: relative;
    z-index: 2;
}
.hero h1 {
    font-size: 56px;
    font-weight: 800;
    margin-bottom: 25px;
    line-height: 1.2;
    text-shadow: 2px 2px 10px rgba(0,0,0,0.3);
}
.hero p {
    font-size: 24px;
    margin-bottom: 35px;
    opacity: 0.95;
    line-height: 1.6;
    text-shadow: 1px 1px 5px rgba(0,0,0,0.3);
}
.hero-btns {
    display: flex;
    gap: 20px;
}
.btn {
    display: inline-block;
    padding: 15px 40px;
    border-radius: 4px;
    font-size: 18px;
    font-weight: 700;
    text-align: center;
    cursor: pointer;
    border: none;
    transition: var(--transition);
}
.btn-white {
    background-color: var(--white);
    color: var(--primary-red);
}
.btn-white:hover {
    background-color: #f0f0f0;
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}
.btn-outline {
    background-color: transparent;
    border: 2px solid var(--white);
    color: var(--white);
}
.btn-outline:hover {
    background-color: rgba(255,255,255,0.1);
    transform: translateY(-3px);
}
section {
    padding: 100px 0;
}
.section-bg-grey {
    background-color: var(--light-grey);
}
.section-header {
    text-align: center;
    margin-bottom: 70px;
}
.section-header h2 {
    font-size: 38px;
    font-weight: 800;
    color: var(--dark-grey);
    margin-bottom: 20px;
    position: relative;
    display: inline-block;
    padding-bottom: 15px;
}
.section-header h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background-color: var(--primary-red);
}
.section-header p {
    font-size: 18px;
    color: #666;
}
.feature-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}
.feature-card {
    position: relative;
    overflow: hidden;
    background-color: #000;
    padding: 0;
    text-align: center;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.15);
    transition: var(--transition);
    border: none;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 350px;
}
.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to top, rgba(0,0,0,0.85) 0%, rgba(0,0,0,0.3) 50%, rgba(0,0,0,0) 100%);
    z-index: 0;
    transition: var(--transition);
}
.feature-card:hover::before {
    background: linear-gradient(to top, rgba(0,0,0,0.9) 0%, rgba(0,0,0,0.4) 50%, rgba(0,0,0,0) 100%);
}
.card-watermark {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 1;
    z-index: -1;
    pointer-events: none;
    transition: var(--transition);
    background-position: center;
}
.feature-card:hover .card-watermark {
    transform: scale(1.1);
}
.feature-content-wrapper {
    background: transparent;
    padding: 20px;
    width: 100%;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    position: absolute;
    bottom: 0;
    z-index: 2;
    box-sizing: border-box;
}
.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 50px rgba(0,0,0,0.3);
}
.feature-icon {
    width: 75px;
    height: 75px;
    margin: 0 auto 15px;
    background-color: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(5px);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 38px;
    color: #ffffff;
    border: 1px solid rgba(255, 255, 255, 0.3);
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}
.feature-card h3 {
    font-size: 24px;
    margin-bottom: 10px;
    color: #ffffff;
    font-weight: bold;
    text-shadow: 2px 2px 5px rgba(0,0,0,0.9);
}
.feature-card p {
    font-size: 16px;
    color: #ffffff;
    line-height: 1.5;
    font-weight: bold;
    text-shadow: 2px 2px 5px rgba(0,0,0,0.9);
    max-width: 90%;
}
.project-list {
    display: flex;
    flex-direction: column;
    gap: 40px;
}
.project-item {
    background-color: var(--white);
    display: flex;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0,0,0,0.05);
}
.project-image {
    flex: 1;
    min-height: 350px;
    background-color: #eee;
    background-size: cover;
    background-position: center;
}
.project-info {
    flex: 1.2;
    padding: 50px;
}
.project-info h3 {
    font-size: 30px;
    color: var(--primary-red);
    margin-bottom: 15px;
}
.project-tagline {
    font-size: 18px;
    color: #666;
    margin-bottom: 25px;
}
.project-features {
    margin-bottom: 35px;
}
.project-features li {
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 16px;
}
.project-features li::before {
    content: '●';
    color: var(--primary-red);
    font-size: 12px;
}
.floating-sidebar {
    position: fixed;
    right: 30px;
    top: 50%;
    transform: translateY(-50%);
    z-index: 2500;
    display: flex;
    flex-direction: column;
    gap: 2px;
}
.sidebar-link {
    width: 75px;
    height: 75px;
    background-color: var(--white);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    cursor: pointer;
    transition: var(--transition);
}
.sidebar-link.active, .sidebar-link:hover {
    background-color: var(--primary-red);
    color: var(--white);
}
.sidebar-link .icon {
    font-size: 26px;
    margin-bottom: 5px;
}
.sidebar-avatar {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    object-fit: cover;
    object-position: center 15%;
    border: 2px solid #ffffff;
    box-shadow: 0 2px 6px rgba(0,0,0,0.15);
    margin-bottom: 5px;
    transition: var(--transition);
}
.sidebar-link:hover .sidebar-avatar {
    transform: scale(1.1);
}
.sidebar-link .text {
    font-size: 13px;
    font-weight: 600;
}
.footer {
    background-color: #1a1a1a;
    color: rgba(255,255,255,0.6);
    padding: 80px 0 30px;
}
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 60px;
    margin-bottom: 60px;
}
.footer-title {
    color: var(--white);
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 30px;
    position: relative;
    padding-bottom: 10px;
}
.footer-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 3px;
    background-color: var(--primary-red);
}
.footer-links li {
    margin-bottom: 15px;
}
.footer-links a:hover {
    color: var(--primary-red);
    padding-left: 5px;
}
.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255,255,255,0.05);
    font-size: 14px;
}
.custom-chat-widget {
    position: fixed;
    right: 30px;
    bottom: 30px;
    width: 380px;
    height: 600px;
    background-color: #ffffff;
    border-radius: 16px;
    box-shadow: 0 8px 40px rgba(0, 0, 0, 0.25);
    z-index: 9999;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    animation: slideUp 0.5s ease;
}
.chat-header {
    background-color: #1a1a1a;
    color: #ffffff;
    padding: 16px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.chat-header-info {
    display: flex;
    align-items: center;
    gap: 12px;
}
.chat-header-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    object-fit: cover;
    object-position: center top;
    border: 1px solid rgba(255, 255, 255, 0.4);
}
.chat-header-title {
    font-size: 15px;
    font-weight: 600;
}
.chat-minimize {
    cursor: pointer;
    font-size: 24px;
    opacity: 0.8;
    transition: opacity 0.3s;
}
.chat-minimize:hover {
    opacity: 1;
}
.chat-body {
    flex: 1;
    overflow-y: auto;
    background-color: #ffffff;
    padding: 20px;
}
.chat-messages {
    display: flex;
    flex-direction: column;
    gap: 16px;
}
.message-bot {
    display: flex;
    gap: 10px;
    align-items: flex-start;
}
.message-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    object-fit: cover;
    object-position: center top;
    flex-shrink: 0;
}
.message-content {
    background-color: #f5f5f5;
    padding: 12px 16px;
    border-radius: 16px;
    border-top-left-radius: 2px;
    max-width: 260px;
}
.message-text {
    font-size: 13px;
    color: #555555;
    line-height: 1.5;
}
.message-user {
    display: flex;
    justify-content: flex-end;
}
.message-user-content {
    background-color: #e60012;
    color: #ffffff;
    padding: 12px 16px;
    border-radius: 16px;
    border-top-right-radius: 2px;
    max-width: 260px;
    font-size: 13px;
    line-height: 1.5;
}
.chat-footer {
    background-color: #1a1a1a;
    padding: 14px 20px;
}
.chat-media-icons {
    display: flex;
    gap: 12px;
    margin-bottom: 10px;
}
.media-icon {
    font-size: 22px;
    cursor: pointer;
    transition: all 0.3s ease;
    user-select: none;
}
.media-icon:hover {
    color: #D4AF37;
    text-shadow: 0 0 15px rgba(212, 175, 55, 0.6);
    transform: scale(1.2);
}
.chat-input-wrapper {
    display: flex;
    gap: 10px;
    background: #2a2a2a;
    padding: 6px 18px;
    border-radius: 50px;
    align-items: center;
}
.chat-input-wrapper input {
    flex: 1;
    background: transparent;
    border: none;
    color: #ffffff;
    padding: 8px 0;
    font-size: 14px;
    outline: none;
}
.chat-input-wrapper input::placeholder {
    color: #888888;
}
.chat-input-wrapper button {
    background: #e60012;
    color: white;
    border: none;
    padding: 8px 20px;
    border-radius: 50px;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}
.chat-input-wrapper button:hover {
    background: #ff1a1a;
    transform: scale(1.05);
}
.message-image, .message-video {
    max-width: 220px;
    border-radius: 12px;
    cursor: pointer;
}
.message-video-container {
    position: relative;
}
.message-video-play {
    max-width: 220px;
    border-radius: 12px;
}
.message-video-overlay {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #D4AF37, #FFD700);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 0 0 20px rgba(212, 175, 55, 0.6);
}
.message-video-overlay::after {
    content: '';
    width: 0;
    height: 0;
    border-left: 20px solid #000;
    border-top: 12px solid transparent;
    border-bottom: 12px solid transparent;
    margin-left: 5px;
}
.message-voice-container {
    background: linear-gradient(135deg, rgba(212, 175, 55, 0.2), rgba(212, 175, 55, 0.1));
    padding: 12px 18px;
    border-radius: 18px;
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    border: 1px solid #D4AF37;
}
.voice-wave {
    display: flex;
    align-items: center;
    gap: 3px;
}
.voice-bar {
    width: 4px;
    background: linear-gradient(180deg, #D4AF37, #FFD700);
    border-radius: 2px;
    animation: voicePulse 0.8s ease-in-out infinite;
}
.voice-bar:nth-child(1) { height: 16px; animation-delay: 0s; }
.voice-bar:nth-child(2) { height: 24px; animation-delay: 0.15s; }
.voice-bar:nth-child(3) { height: 18px; animation-delay: 0.3s; }
.voice-bar:nth-child(4) { height: 28px; animation-delay: 0.45s; }
.voice-bar:nth-child(5) { height: 20px; animation-delay: 0.6s; }
@keyframes voicePulse {
    0%, 100% { opacity: 0.5; transform: scaleY(1); }
    50% { opacity: 1; transform: scaleY(1.3); }
}
.voice-duration {
    color: #D4AF37;
    font-weight: 600;
    font-size: 14px;
}
.voice-playing .voice-bar {
    animation-play-state: running;
}
.voice-paused .voice-bar {
    animation-play-state: paused;
}
.chat-widget-mini {
    position: fixed;
    right: 30px;
    bottom: 30px;
    z-index: 9998;
    display: none;
    cursor: pointer;
    transition: transform 0.3s;
}
.chat-widget-mini:hover {
    transform: scale(1.1);
}
.chat-mini-avatar {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    object-fit: cover;
    object-position: center top;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.25);
    border: 3px solid #ffffff;
}
@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(100px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}
.about-content {
    padding-top: 40px !important;
    padding-bottom: 40px !important;
}
.about-content .section-header {
    margin-bottom: 30px !important;
}
.about-content p {
    margin-bottom: 15px !important;
}
.about-content p:last-child {
    margin-bottom: 0 !important;
}
#masters-section, #doctoral-section, #partner-section, #alumni-section, #about-section {
    margin-top: 30px !important;
}
section.features {
    padding-bottom: 30px !important;
}
.page-banner {
    margin-top: 0 !important;
}
@media (max-width: 1024px) {
    .feature-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
    .nav { display: none; }
    .hero h1 { font-size: 24px; }
    .hero p { font-size: 16px; }
    .project-item { flex-direction: column; }
    .project-image { min-height: 250px; }
    .feature-grid { grid-template-columns: 1fr; gap: 20px; }
    .feature-card { min-height: 280px; }
    .footer-grid { grid-template-columns: 1fr; gap: 30px; }
    .page-banner { height: 220px !important; background-size: cover; background-position: center; padding: 0 !important; }
    .page-banner h1 { font-size: 26px; }
    .section-header h2 { font-size: 26px; }
    .section-header p { font-size: 15px; }
    .project-info { padding: 30px 20px; }
    .project-info h3 { font-size: 22px; }
    .project-tagline { font-size: 16px; }
    .project-features li { font-size: 14px; }
    .feature-card h3 { font-size: 20px; }
    .feature-card p { font-size: 14px; }
    .feature-icon { width: 60px; height: 60px; font-size: 32px; }
    .about-content p { font-size: 15px !important; text-indent: 1.5em !important; }
    .custom-chat-widget { width: 90%; right: 5%; bottom: 5%; height: 75vh; border-radius: 16px; }
    .chat-widget-mini { right: 15px; bottom: 15px; }
    .chat-mini-avatar { width: 45px; height: 45px; border-width: 2px; }
    .chat-header { padding: 14px 16px; }
    .chat-header-avatar { width: 28px; height: 28px; }
    .chat-header-title { font-size: 14px; }
    .chat-minimize { font-size: 22px; }
    .chat-body { padding: 16px; }
    .message-text { font-size: 13px; }
    .message-avatar { width: 28px; height: 28px; }
    .message-content { max-width: 220px; padding: 10px 14px; }
    .message-user-content { max-width: 220px; padding: 10px 14px; font-size: 13px; }
    .message-image, .message-video-play { max-width: 180px; }
    .message-voice-container { padding: 10px 14px; }
    .voice-duration { font-size: 12px; }
    .chat-media-icons { gap: 10px; margin-bottom: 8px; }
    .media-icon { font-size: 20px; }
    .chat-footer { padding: 12px 16px; }
    .chat-input-wrapper { padding: 4px 14px; }
    .chat-input-wrapper input { font-size: 13px; }
    .chat-input-wrapper button { padding: 6px 16px; font-size: 12px; }
    .floating-sidebar { right: 10px; top: auto; bottom: 120px; transform: none; }
    .sidebar-link { width: 55px; height: 55px; }
    .sidebar-avatar { width: 35px; height: 35px; }
    .sidebar-link .icon { font-size: 22px; }
    .sidebar-link .text { font-size: 11px; }
    .container { padding: 0 15px; }
    .btn { padding: 12px 28px; font-size: 15px; }
    .hero-btns { gap: 12px; flex-direction: column; }
    .hero-btns .btn { width: 100%; }
    .header { height: 70px; }
    .logo-text { font-size: 20px; }
    .logo-subtext { font-size: 10px; }
    .logo-img { height: 36px; width: 36px; }
    .phone-box { padding: 5px 14px; font-size: 14px; }
    section { padding: 30px 0 !important; }
    #masters-section, #doctoral-section, #partner-section, #alumni-section, #about-section { margin-top: 15px !important; margin-bottom: 0 !important; }
    .projects, .partners, .features, .about-content { padding-top: 20px !important; padding-bottom: 20px !important; }
    section.features { padding-bottom: 15px !important; }
}
.cases-section {
    background-color: #000000;
    padding: 80px 0;
}
.section-header-black {
    text-align: center;
    margin-bottom: 60px;
}
.section-header-black h2 {
    font-size: 36px;
    font-weight: 800;
    color: #D4AF37;
    position: relative;
    display: inline-block;
    padding-bottom: 20px;
}
.section-header-black h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 3px;
    background: linear-gradient(90deg, transparent, #D4AF37, transparent);
}
.video-section {
    margin-bottom: 80px;
}
.video-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}
.video-card {
    background: linear-gradient(145deg, #111111, #000000);
    border: 2px solid;
    border-image: linear-gradient(45deg, #D4AF37, #FFD700, #D4AF37) 1;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 10px 40px rgba(212, 175, 55, 0.15);
}
.video-wrapper {
    position: relative;
    overflow: hidden;
    background: #000;
    min-height: 280px;
}
.video-wrapper video {
    width: 100%;
    height: 100%;
    min-height: 280px;
    display: block;
    object-fit: cover;
}
.play-button {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 5;
    pointer-events: none;
}
.play-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #D4AF37, #FFD700);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 0 30px rgba(212, 175, 55, 0.5);
}
.play-icon::after {
    content: '';
    width: 0;
    height: 0;
    border-left: 30px solid #000;
    border-top: 18px solid transparent;
    border-bottom: 18px solid transparent;
    margin-left: 8px;
}
.video-info {
    padding: 30px;
}
.video-info h3 {
    color: #D4AF37;
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 15px;
}
.video-info p {
    color: #cccccc;
    font-size: 15px;
    line-height: 1.8;
}
.watermark-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    pointer-events: none;
    z-index: 4;
}
.watermark-overlay::before {
    content: 'TG: MA6688999';
    color: rgba(212, 175, 55, 0.12);
    font-size: 28px;
    font-weight: 800;
    transform: rotate(-25deg);
    letter-spacing: 4px;
    white-space: nowrap;
}
.declaration-section {
    text-align: center;
    margin: 60px 0;
    padding: 30px;
    background: linear-gradient(90deg, transparent, rgba(212, 175, 55, 0.1), transparent);
}
.declaration-text {
    font-size: 22px;
    font-weight: 800;
    color: #D4AF37;
    text-shadow: 0 0 20px rgba(212, 175, 55, 0.3);
}
.cases-matrix-section {
    margin-bottom: 80px;
}
.cases-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
}
.case-card {
    background: linear-gradient(145deg, #111111, #000000);
    border: 2px solid;
    border-image: linear-gradient(45deg, #D4AF37, #FFD700, #D4AF37) 1;
    border-radius: 16px;
    overflow: hidden;
    cursor: pointer;
    transition: all 0.4s ease;
}
.case-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 60px rgba(212, 175, 55, 0.25);
}
.case-img-wrapper {
    position: relative;
    overflow: hidden;
    height: 260px;
}
.case-img-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.case-text {
    padding: 25px;
}
.case-text p {
    color: #cccccc;
    font-size: 15px;
    line-height: 1.8;
}
.premium-section {
    margin-top: 60px;
}
.premium-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    margin-bottom: 40px;
}
.premium-card {
    background: linear-gradient(145deg, #111111, #000000);
    border: 2px solid;
    border-image: linear-gradient(45deg, #D4AF37, #FFD700, #D4AF37) 1;
    border-radius: 16px;
    overflow: hidden;
}
.premium-img-wrapper {
    position: relative;
    overflow: hidden;
    min-height: 300px;
}
.premium-img-wrapper img {
    width: 100%;
    height: 300px;
    object-fit: cover;
}
.premium-img-double {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2px;
    height: 300px;
}
.premium-img-double img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.premium-text {
    padding: 25px 30px 30px;
}
.premium-text h3 {
    color: #D4AF37;
    font-size: 22px;
    font-weight: 800;
    margin-bottom: 15px;
}
.premium-text p {
    color: #cccccc;
    font-size: 15px;
    line-height: 1.8;
}
.bottom-banner-section {
    background: linear-gradient(145deg, #111111, #000000);
    border: 2px solid;
    border-image: linear-gradient(45deg, #D4AF37, #FFD700, #D4AF37) 1;
    border-radius: 16px;
    overflow: hidden;
}
.banner-img-wrapper {
    position: relative;
    overflow: hidden;
    height: 350px;
}
.banner-img-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.banner-text {
    padding: 30px;
    text-align: center;
}
.banner-text p {
    color: #cccccc;
    font-size: 16px;
    line-height: 1.8;
}
.image-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 99999;
}
.modal-backdrop {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.95);
}
.modal-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    max-width: 90%;
    max-height: 90%;
}
.modal-content img {
    max-width: 100%;
    max-height: 85vh;
    border: 3px solid;
    border-image: linear-gradient(45deg, #D4AF37, #FFD700, #D4AF37) 1;
    border-radius: 12px;
}
.modal-close {
    position: absolute;
    top: -50px;
    right: 0;
    font-size: 50px;
    color: #D4AF37;
    cursor: pointer;
    line-height: 1;
}
.modal-close:hover {
    color: #FFD700;
}
@media (max-width: 1024px) {
    .video-grid, .cases-grid, .premium-grid {
        grid-template-columns: 1fr;
    }
}
@media (max-width: 768px) {
    .cases-section {
        padding: 40px 0;
    }
    .section-header-black h2 {
        font-size: 24px;
    }
    .video-info h3 {
        font-size: 17px;
    }
    .video-info p, .case-text p, .premium-text p, .banner-text p {
        font-size: 14px;
    }
    .declaration-text {
        font-size: 16px;
    }
    .watermark-overlay::before {
        font-size: 18px;
    }
    .play-icon {
        width: 60px;
        height: 60px;
    }
    .play-icon::after {
        border-left: 20px solid #000;
        border-top: 12px solid transparent;
        border-bottom: 12px solid transparent;
    }
    .premium-text h3 {
        font-size: 18px;
    }
}