/**
 * 与首页 Home/View/Index/index.html 一致的顶部导航样式
 */
:root {
    --primary-color: #4361ee;
    --secondary-color: #3a0ca3;
    --accent-color: #4cc9f0;
    --dark-color: #0a0a29;
    --light-color: #f8f9fa;
    --text-color: #333;
    --text-light: #6c757d;
    --transition: all 0.3s ease;
}

.header .container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

/* 导航栏 */
.header {
    background-color: rgba(10, 10, 41, 0.95);
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 15px 0;
    transition: var(--transition);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.header.scrolled {
    background-color: rgba(10, 10, 41, 0.98);
    box-shadow: 0 5px 25px rgba(0, 0, 0, 0.3);
    padding: 10px 0;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
}

.navbar::after {
    content: "";
    position: absolute;
    bottom: -15px;
    left: 0;
    width: 100%;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(76, 201, 240, 0.3), transparent);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.header.scrolled .navbar::after {
    opacity: 1;
}

.navbar-brand {
    display: flex;
    align-items: center;
    color: white;
    text-decoration: none;
    position: relative;
    padding: 5px 0;
    animation: subtlePulse 5s ease-in-out infinite;
}

.navbar-brand::before {
    content: "";
    position: absolute;
    top: 0;
    left: -10px;
    width: 3px;
    height: 100%;
    background: linear-gradient(to bottom, var(--primary-color), var(--secondary-color));
    border-radius: 3px;
    transform: scaleY(0);
    transition: transform 0.3s ease;
}

.navbar-brand:hover {
    animation-play-state: paused;
}

.navbar-brand:hover::before {
    transform: scaleY(1);
}

.brand-text {
    display: flex;
    flex-direction: column;
    margin-left: 15px;
    position: relative;
}

.brand-cn {
    font-size: 1.8rem;
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: 1px;
    background: linear-gradient(90deg, #fff, #e0e0ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 0 10px rgba(67, 97, 238, 0.2);
    transition: all 0.3s ease;
}

.brand-en {
    font-size: 1.1rem;
    font-weight: 500;
    opacity: 0.9;
    letter-spacing: 2px;
    color: #a0a0ff;
    transition: all 0.3s ease;
}

.navbar-brand:hover .brand-cn {
    transform: translateY(-2px);
    background: linear-gradient(90deg, #fff, #a0ffff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 0 15px rgba(67, 97, 238, 0.4);
}

.navbar-brand:hover .brand-en {
    transform: translateY(2px);
    color: #a0ffff;
    letter-spacing: 3px;
}

.logo {
    height: 60px;
    filter: drop-shadow(0 0 8px rgba(67, 97, 238, 0.6));
    transition: transform 0.3s ease;
    transform-origin: center;
}

@keyframes logoWingFlap {
    0% { transform: translateY(0) rotate(0); }
    25% { transform: translateY(-8px) rotate(5deg); }
    50% { transform: translateY(0) rotate(0); }
    75% { transform: translateY(8px) rotate(-5deg); }
    100% { transform: translateY(0) rotate(0); }
}

.logo-wing-left, .logo-wing-right {
    transition: transform 0.3s ease;
    animation: logoWingFlap 4s ease-in-out infinite;
    transform-origin: center;
}

.logo-wing-left {
    animation-delay: 0.2s;
}

@keyframes blinkEyes {
    0% { r: 3; }
    48% { r: 3; }
    50% { r: 0.5; }
    52% { r: 3; }
    100% { r: 3; }
}

.logo-eye-left, .logo-eye-right {
    transition: transform 0.3s ease, fill 0.3s ease;
    animation: blinkEyes 5s infinite;
}

.logo-eye-right {
    animation-delay: 0.3s;
}

.logo-body {
    transition: fill 0.3s ease, transform 0.3s ease;
}

.logo-ear-left, .logo-ear-right {
    transition: transform 0.3s ease;
}

.navbar-brand:hover .logo-wing-left {
    transform-origin: right center;
    transform: rotate(-15deg) translateY(-5px) scale(1.1);
    animation-play-state: paused;
}

.navbar-brand:hover .logo-wing-right {
    transform-origin: left center;
    transform: rotate(15deg) translateY(-5px) scale(1.1);
    animation-play-state: paused;
}

.navbar-brand:hover .logo-body {
    fill: #5570ff;
    transform: scale(1.1);
}

.navbar-brand:hover .logo-ear-left {
    transform-origin: right bottom;
    transform: rotate(-10deg) translateY(-4px);
}

.navbar-brand:hover .logo-ear-right {
    transform-origin: left bottom;
    transform: rotate(10deg) translateY(-4px);
}

.navbar-brand:hover .logo-eye-left,
.navbar-brand:hover .logo-eye-right {
    fill: #ffcc00;
    transform: scale(1.5);
    animation-play-state: paused;
}

.navbar-nav {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-item {
    margin: 0 5px;
    position: relative;
}

.nav-link {
    color: rgba(255, 255, 255, 0.8);
    padding: 10px 15px;
    font-size: 1.05rem;
    font-weight: 500;
    transition: all 0.3s ease;
    text-decoration: none;
    display: block;
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.nav-link::before {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--primary-color);
    transform: translateX(-100%);
    transition: transform 0.3s ease;
    z-index: -1;
}

.nav-link:hover::before,
.nav-item.active .nav-link::before {
    transform: translateX(0);
}

.nav-link:hover {
    color: #fff;
    transform: translateY(-2px);
}

.nav-item.active .nav-link {
    color: white;
}

.nav-item.active::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 15px;
    width: calc(100% - 30px);
    height: 2px;
    background-color: var(--primary-color);
    box-shadow: 0 0 8px var(--primary-color);
}

.navbar-toggler {
    display: none;
    background: none;
    border: none;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    transition: transform 0.3s ease;
    padding: 5px;
    border-radius: 5px;
    background-color: rgba(255, 255, 255, 0.1);
}

.navbar-toggler:hover {
    transform: scale(1.1);
    background-color: rgba(255, 255, 255, 0.15);
}

@keyframes subtlePulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.02); }
    100% { transform: scale(1); }
}

@media (max-width: 768px) {
    .navbar {
        position: relative;
    }

    .navbar-toggler {
        display: block;
        z-index: 100;
    }

    .navbar-nav {
        position: absolute;
        top: 100%;
        right: 0;
        width: 80%;
        max-width: 300px;
        flex-direction: column;
        background: linear-gradient(135deg, rgba(26, 26, 46, 0.95) 0%, rgba(67, 97, 238, 0.95) 100%);
        padding: 20px;
        margin-top: 15px;
        border-radius: 10px;
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
        display: none;
        animation: slideIn 0.3s ease-out forwards;
        backdrop-filter: blur(10px);
        -webkit-backdrop-filter: blur(10px);
        border: 1px solid rgba(255, 255, 255, 0.1);
        transform: translateY(10px);
        opacity: 0;
        transition: transform 0.3s ease, opacity 0.3s ease;
        z-index: 2000;
    }

    @keyframes slideIn {
        from {
            transform: translateY(10px);
            opacity: 0;
        }
        to {
            transform: translateY(0);
            opacity: 1;
        }
    }

    .navbar-nav.show {
        display: flex;
        opacity: 1;
        transform: translateY(0);
    }

    .nav-item {
        margin: 0;
        width: 100%;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }

    .nav-item:last-child {
        border-bottom: none;
    }

    .nav-link {
        padding: 15px 20px;
        width: 100%;
        text-align: left;
    }

    .nav-link::before {
        display: none;
    }

    .nav-item.active::after {
        display: none;
    }

    .nav-item.active .nav-link {
        background-color: rgba(255, 255, 255, 0.1);
        border-left: 3px solid var(--primary-color);
        padding-left: 17px;
    }
}