/* 
 * 视觉特效样式文件
 * 依赖于style.css中定义的变量和动画
 */

/* ============================================================ */
/* ===== Hero和System区域图片特效 ===== */
/* ============================================================ */

/* 图片容器和基础样式 */
.hero-image, .system-image {
    position: relative;
    overflow: hidden;
    border-radius: 12px;
    box-shadow: 0 10px 30px var(--shadow-color);
    transition: var(--image-transition);
    cursor: pointer;
    animation: fadeIn 1.2s ease-out forwards;
}

.system-image {
    animation-duration: 1s;
}

.hero-img, .system-image img {
    transform-origin: center;
    transition: var(--image-transition);
    will-change: transform;
}

.system-image img {
    border-radius: 8px;
}

/* 图片悬停效果 */
.hero-image:hover .hero-img {
    transform: scale(1.03);
}

.system-image:hover img {
    transform: scale(1.04);
}

/* 徽章效果 */
.hero-badge {
    animation: pulse 2s infinite alternate ease-in-out;
    box-shadow: 0 5px 15px rgba(26, 54, 93, 0.2);
    transition: var(--image-transition);
}

.hero-image:hover .hero-badge {
    transform: scale(1.1) translateX(-5px) translateY(-5px);
    box-shadow: 0 10px 25px rgba(26, 54, 93, 0.35);
}

/* 光效共享样式 */
.hero-image::before, .system-image::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 50%;
    height: 100%;
    background: linear-gradient(
        to right,
        transparent,
        var(--highlight-color),
        transparent
    );
    transform: skewX(-25deg);
    z-index: 0;
    pointer-events: none;
}

/* 光效动画 */
.hero-image::before {
    animation: shine 6s infinite;
}

.system-image::before {
    animation: shine 8s infinite;
}

/* 悬停上移效果 */
.hero-image {
    transition: transform 0.5s ease;
}

.hero-content:hover .hero-image {
    transform: translateY(-5px);
}

/* 系统图片边框发光效果 */
.system-image::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border-radius: 12px;
    box-shadow: 0 0 0 0 var(--glow-color);
    opacity: 0;
    transition: all 0.5s ease;
}

.system-image:hover::after {
    box-shadow: 0 0 0 6px var(--glow-color);
    opacity: 1;
}

/* 交互式数据点效果 */
.data-point {
    position: absolute;
    width: 12px;
    height: 12px;
    background-color: var(--color-primary);
    border-radius: 50%;
    box-shadow: 0 0 0 4px rgba(26, 54, 93, 0.3);
    cursor: pointer;
    z-index: 2;
    animation: pulse 2s infinite;
}

.data-point:nth-child(1) {
    top: 25%;
    left: 20%;
    animation-delay: 0s;
}

.data-point:nth-child(2) {
    top: 60%;
    left: 70%;
    animation-delay: 0.5s;
}

.data-point:nth-child(3) {
    top: 40%;
    left: 50%;
    animation-delay: 1s;
}

/* ============================================================ */
/* ===== 导航特效 ===== */
/* ============================================================ */

/* 导航链接样式 */
.nav-link {
    position: relative;
    padding: 0.5rem 0.8rem;
    margin: 0 0.2rem;
    transition: all var(--transition-duration) var(--transition-bezier);
    font-weight: 500;
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.nav-link:hover {
    color: var(--color-primary);
    transform: translateY(-2px) scale(var(--hover-scale));
    background-color: rgba(26, 54, 93, 0.08);
}

.nav-link:active {
    transform: scale(var(--active-scale));
}

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

/* 下划线效果 */
.nav-link::after, .university-name::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background-color: var(--color-primary);
    transition: all var(--transition-duration) var(--transition-bezier);
    transform: translateX(-50%);
    opacity: 0;
}

.nav-link:hover::after, .university-logo:hover .university-name::after {
    width: 100%;
    opacity: 1;
}

/* 光晕效果 */
.nav-link::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(120deg, 
        rgba(26, 54, 93, 0) 0%, 
        var(--glow-color-light) 50%, 
        rgba(26, 54, 93, 0) 100%);
    background-size: 200% 200%;
    opacity: 0;
    z-index: -1;
    transition: opacity var(--transition-duration) ease;
    border-radius: inherit;
}

/* 悬停时显示光晕 */
.nav-link:hover::before {
    opacity: 0.5;
    animation: glowRotate 2s ease-in-out infinite;
}

/* Logo动画效果 */
.logo {
    transition: transform var(--transition-duration) var(--transition-bezier);
}

.logo:hover {
    transform: translateY(-3px);
}

.logo:hover .logo-img {
    transform: scale(1.08);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.logo-img {
    transition: all var(--transition-duration) var(--transition-bezier);
}

/* ============================================================ */
/* ===== 合作院校Logo动态视觉特效 ===== */
/* ============================================================ */

/* 加载动画效果 */
@keyframes logoFadeIn {
    from {
        opacity: 0;
        transform: translateY(20px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* 脉冲光晕效果 */
@keyframes logoPulse {
    0% {
        box-shadow: 0 0 0 0 var(--logo-glow-color);
    }
    70% {
        box-shadow: 0 0 0 10px rgba(26, 54, 93, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(26, 54, 93, 0);
    }
}

/* 旋转光晕效果 */
@keyframes logoGlowRotate {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}

/* 应用加载动画到每个logo */
.university-logo {
    opacity: 0;
    animation: logoFadeIn 0.8s ease forwards;
    animation-delay: calc(var(--logo-index, 0) * 0.1s);
    cursor: pointer;
    position: relative;
    transition: transform var(--logo-transition-duration) cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* 设置每个logo的动画延迟 */
.universities-grid .university-logo:nth-child(1) { --logo-index: 1; }
.universities-grid .university-logo:nth-child(2) { --logo-index: 2; }
.universities-grid .university-logo:nth-child(3) { --logo-index: 3; }
.universities-grid .university-logo:nth-child(4) { --logo-index: 4; }
.universities-grid .university-logo:nth-child(5) { --logo-index: 5; }
.universities-grid .university-logo:nth-child(6) { --logo-index: 6; }
.universities-grid .university-logo:nth-child(7) { --logo-index: 7; }
.universities-grid .university-logo:nth-child(8) { --logo-index: 8; }
.universities-grid .university-logo:nth-child(9) { --logo-index: 9; }

/* Logo图片容器样式增强 */
.university-logo-img {
    overflow: hidden;
    transition: all var(--logo-transition-duration) cubic-bezier(0.34, 1.56, 0.64, 1);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    position: relative;
    z-index: 1;
}

/* Logo图片样式增强 */
.university-logo-img img {
    transition: all var(--logo-transition-duration) ease;
    transform-origin: center;
    backface-visibility: hidden;
    will-change: transform;
}

/* Logo名称样式增强 */
.university-name {
    transition: all var(--logo-transition-duration) ease;
    position: relative;
    padding: 0.25rem 0;
}

/* 名称下划线效果 */
.university-name::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background-color: var(--color-primary);
    transition: all var(--logo-transition-duration) ease;
    transform: translateX(-50%);
    opacity: 0;
}

/* ===== 悬停效果 ===== */

/* Logo整体悬停效果 */
.university-logo:hover {
    transform: translateY(-5px) scale(var(--logo-hover-scale));
}

/* Logo图片容器悬停效果 */
.university-logo:hover .university-logo-img {
    box-shadow: var(--logo-shadow-hover);
    border-radius: calc(var(--radius-md) * 1.2);
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%); /* 动态科技灰色背景 */
    animation: techGrayPulse 2s infinite alternate ease-in-out;
}

/* 动态科技灰色背景动画 */
@keyframes techGrayPulse {
    0% {
        background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 50%);
    }
    50% {
        background: linear-gradient(135deg, #e6e9f0 0%, #d5d8dc 50%);
    }
    100% {
        background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 50%);
    }
}

/* Logo图片悬停效果 */
.university-logo:hover .university-logo-img img {
    transform: scale(1.05);
}

/* Logo名称悬停效果 */
.university-logo:hover .university-name {
    color: var(--color-primary);
    font-weight: 500;
}

/* 名称下划线悬停效果 */
.university-logo:hover .university-name::after {
    width: 70%;
    opacity: 1;
}

/* ===== 点击效果 ===== */

/* Logo点击效果 */
.university-logo:active {
    transform: translateY(0) scale(var(--logo-active-scale));
}

/* Logo图片容器点击效果 */
.university-logo:active .university-logo-img {
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

/* ===== 高级视觉效果 ===== */

/* 添加光晕效果容器 */
.university-logo-img::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: linear-gradient(120deg, 
        rgba(26, 54, 93, 0) 0%, 
        rgba(26, 54, 93, 0.2) 50%, 
        rgba(26, 54, 93, 0) 100%);
    background-size: 200% 200%;
    border-radius: inherit;
    opacity: 0;
    z-index: -1;
    transition: opacity var(--logo-transition-duration) ease;
}

/* 悬停时显示光晕 */
.university-logo:hover .university-logo-img::before {
    opacity: 1;
    animation: logoGlowRotate 2s ease-in-out infinite;
}

/* 点击时的脉冲效果 */
.university-logo.pulse .university-logo-img {
    animation: logoPulse 1s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* ============================================================ */
/* ===== 响应式调整 ===== */
/* ============================================================ */

@media (max-width: 768px) {
    /* Hero和System响应式调整 */
    .hero-image::before,
    .system-image::before {
        animation-duration: 10s;
    }
    
    .hero-image:hover .hero-img,
    .system-image:hover img {
        transform: scale(1.02);
    }
    
    /* 导航响应式调整 */
    .nav-link:hover {
        transform: translateY(-1px) scale(1.02);
    }
    
    /* Logo响应式调整 */
    .university-logo:hover {
        transform: translateY(-3px) scale(1.05);
    }
    
    .university-logo-img {
        width: 70px;
        height: 70px;
    }
}

@media (max-width: 480px) {
    .university-logo:hover {
        transform: translateY(-2px) scale(1.03);
    }
    
    .university-logo-img {
        width: 60px;
        height: 60px;
    }
}

/* ===== 无动画模式支持 ===== */
@media (prefers-reduced-motion: reduce) {
    .hero-image, .system-image, .hero-badge, .data-point,
    .university-logo {
        animation: none;
    }
    
    .hero-image::before, .system-image::before,
    .nav-link::before, .university-logo-img::before {
        animation: none;
        display: none;
    }
    
    .nav-link, .logo, .logo-img,
    .university-logo, .university-logo-img, .university-name {
        transition: none;
    }
    
    .nav-link:hover, .nav-link:active,
    .university-logo:hover, .university-logo:active {
        transform: none;
    }
    
    .university-logo {
        opacity: 1;
    }
}