AI导航

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #00d4ff;
    --primary-dark: #00a8cc;
    --secondary: #ff00ff;
    --accent: #7b2dff;
    --bg-dark: #0a0a0f;
    --bg-darker: #050508;
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.7);
    --text-muted: rgba(255, 255, 255, 0.5);
    --glass-bg: rgba(15, 20, 35, 0.6);
    --glass-border: rgba(0, 212, 255, 0.2);
    --glow-primary: 0 0 30px rgba(0, 212, 255, 0.5);
    --glow-secondary: 0 0 30px rgba(255, 0, 255, 0.4);
}

html {
    font-size: 16px;
}

body {
    font-family: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    background: var(--bg-dark);
    min-height: 100vh;
    overflow-x: hidden;
    color: var(--text-primary);
    position: relative;
}

/* ========== 背景特效 ========== */
.bg-effects {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: -1;
    overflow: hidden;
}

.gradient-flow {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(ellipse at 20% 80%, rgba(0, 212, 255, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 20%, rgba(255, 0, 255, 0.1) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 50%, rgba(123, 45, 255, 0.08) 0%, transparent 60%);
    animation: gradientShift 15s ease-in-out infinite;
    pointer-events: none;
}

@keyframes gradientShift {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.8; transform: scale(1.1); }
}

.gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.5;
    animation: orbFloat 20s ease-in-out infinite;
    pointer-events: none;
}

.orb-1 {
    /* 已删除：原左上角装饰圆球，会遮挡图标点击 */
    display: none;
}

.orb-2 {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, var(--secondary), transparent 70%);
    bottom: -150px;
    right: -150px;
    animation-delay: -7s;
}

.orb-3 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, var(--accent), transparent 70%);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: -14s;
}

@keyframes orbFloat {
    0%, 100% { transform: translate(0, 0) scale(1); opacity: 0.5; }
    25% { transform: translate(50px, -50px) scale(1.1); opacity: 0.6; }
    50% { transform: translate(-30px, 30px) scale(0.95); opacity: 0.4; }
    75% { transform: translate(30px, 50px) scale(1.05); opacity: 0.55; }
}

.grid-lines {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        linear-gradient(rgba(0, 212, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 212, 255, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    animation: gridMove 25s linear infinite;
    pointer-events: none;
}

@keyframes gridMove {
    0% { transform: perspective(1000px) rotateX(60deg) translateY(0); }
    100% { transform: perspective(1000px) rotateX(60deg) translateY(60px); }
}

.particles-container {
    position: absolute;
    width: 100%;
    height: 100%;
    overflow: hidden;
    pointer-events: none;
}

.particle {
    position: absolute;
    background: rgba(0, 212, 255, 0.6);
    border-radius: 50%;
    animation: particleFloat 20s infinite;
    pointer-events: none;
}

@keyframes particleFloat {
    0%, 100% { 
        transform: translateY(0) translateX(0); 
        opacity: 0;
    }
    10% { opacity: 1; }
    90% { opacity: 1; }
    100% { 
        transform: translateY(-100vh) translateX(50px); 
        opacity: 0;
    }
}

.connection-lines {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0.3;
    pointer-events: none;
}

.conn-line {
    fill: none;
    stroke: url(#lineGradient);
    stroke-width: 0.3;
    animation: linePulse 4s ease-in-out infinite;
}

.conn-line.cl-2 {
    animation-delay: -1.5s;
}

.conn-line.cl-3 {
    animation-delay: -3s;
}

@keyframes linePulse {
    0%, 100% { opacity: 0.2; }
    50% { opacity: 0.5; }
}

/* ========== 头部导航 ========== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100000;
    padding: 20px 40px;
    background: linear-gradient(to bottom, rgba(10, 10, 15, 0.9), transparent);
    pointer-events: none;
}

.header * {
    pointer-events: auto;
}

.header-inner {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    position: relative;
    z-index: 100001;
}

.fullscreen-btn {
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid rgba(0, 212, 255, 0.3);
    border-radius: 8px;
    padding: 8px;
    color: var(--primary);
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.fullscreen-btn:hover {
    background: rgba(0, 212, 255, 0.2);
    box-shadow: 0 0 15px rgba(0, 212, 255, 0.3);
}

.fullscreen-btn svg {
    display: block;
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    box-shadow: 0 0 20px rgba(0, 212, 255, 0.4);
}

.logo-text {
    font-size: 20px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ========== 主内容区 ========== */
.main-content {
    position: relative;
    z-index: 10;
    min-height: 100vh;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding-top: 60px;
}

.hero-section {
    width: 100%;
    max-width: 1600px;
}

.orbit-system {
    position: relative;
    width: 100%;
    height: 850px;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    z-index: 15;
}

/* ========== 轨道环 ========== */
.orbit-ring {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    border-radius: 50%;
    pointer-events: none;
    /* 裁剪超出圆形范围的内容，防止图标在圆盘外遮挡其他元素 */
    overflow: visible;
}

.orbit-outer {
    width: 800px;
    height: 800px;
    animation: rotate 80s linear infinite;
}

.orbit-inner {
    width: 550px;
    height: 550px;
    animation: rotateReverse 60s linear infinite;
}

@keyframes rotate {
    from { transform: translate(-50%, -50%) rotate(0deg); }
    to { transform: translate(-50%, -50%) rotate(360deg); }
}

@keyframes rotateReverse {
    from { transform: translate(-50%, -50%) rotate(360deg); }
    to { transform: translate(-50%, -50%) rotate(0deg); }
}

/* ========== 轨道项目 ========== */
.orbit-item {
    position: absolute;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    cursor: pointer;
    transition: transform 0.3s ease;
    pointer-events: auto;
    z-index: 9999;
}

.orbit-outer .orbit-item {
    /* 外环：反向旋转保持正向 */
    transform-origin: center center;
    animation: counterRotate 80s linear infinite;
}

.orbit-inner .orbit-item {
    /* 内环：反向旋转保持正向 */
    transform-origin: center center;
    animation: counterRotateReverse 60s linear infinite;
}

/* 反向旋转动画 - 抵消轨道旋转 */
@keyframes counterRotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(-360deg); }
}

@keyframes counterRotateReverse {
    from { transform: rotate(-360deg); }
    to { transform: rotate(0deg); }
}

.orbit-item:hover {
    transform: scale(1.2) !important;
    z-index: 99999;
}

.orbit-icon {
    width: 32px;
    height: 32px;
    object-fit: contain;
    filter: drop-shadow(0 0 8px rgba(0, 212, 255, 0.5));
    transition: all 0.3s ease;
}

.orbit-item:hover .orbit-icon {
    filter: drop-shadow(0 0 15px rgba(0, 212, 255, 0.8));
}

.orbit-name {
    font-size: 11px;
    color: var(--text-muted);
    white-space: nowrap;
    opacity: 0;
    transform: translateY(-5px);
    transition: all 0.3s ease;
    background: rgba(0, 0, 0, 0.7);
    padding: 2px 8px;
    border-radius: 10px;
    backdrop-filter: blur(10px);
}

.orbit-item:hover .orbit-name {
    opacity: 1;
    transform: translateY(0);
}

/* ========== 中心内容 ========== */
.center-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 50;
    text-align: center;
    width: 380px;
    height: 380px;
    background: radial-gradient(circle, rgba(15, 20, 35, 0.9) 0%, rgba(15, 20, 35, 0.6) 70%, transparent 100%);
    border-radius: 50%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 40px;
    border: 1px solid rgba(0, 212, 255, 0.2);
    box-shadow:
        inset 0 0 60px rgba(0, 212, 255, 0.1),
        0 0 60px rgba(0, 0, 0, 0.5);
    pointer-events: none;
}

.center-content > * {
    pointer-events: auto;
}

.center-content::before {
    content: '';
    position: absolute;
    inset: -3px;
    border-radius: 50%;
    background: conic-gradient(from 0deg, transparent, rgba(0, 212, 255, 0.3), transparent, rgba(255, 0, 255, 0.3), transparent);
    animation: rotate 15s linear infinite;
    z-index: -1;
}

.center-content::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(15, 20, 35, 0.95) 0%, transparent 100%);
    z-index: -1;
}

.center-badge {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid rgba(0, 212, 255, 0.3);
    border-radius: 20px;
    font-size: 11px;
    color: var(--primary);
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 20px;
    animation: badgeGlow 3s ease-in-out infinite;
}

@keyframes badgeGlow {
    0%, 100% { box-shadow: 0 0 10px rgba(0, 212, 255, 0.2); }
    50% { box-shadow: 0 0 20px rgba(0, 212, 255, 0.4); }
}

.center-icon {
    width: 50px;
    height: 50px;
    margin-bottom: 12px;
    animation: iconFloat 3s ease-in-out infinite;
}

@keyframes iconFloat {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-6px); }
}

.center-title {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 10px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    min-height: 28px;
}

.center-desc {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.5;
    margin-bottom: 16px;
    min-height: 40px;
    max-width: 300px;
}

.center-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 24px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    text-decoration: none;
    border-radius: 25px;
    font-size: 13px;
    font-weight: 600;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(0, 212, 255, 0.4);
    opacity: 0;
    transform: translateY(10px);
    pointer-events: none;
}

.center-btn.visible {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

.center-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(0, 212, 255, 0.6);
}

.typing-cursor {
    display: inline-block;
    width: 2px;
    height: 1.2em;
    background: var(--primary);
    margin-left: 2px;
    animation: cursorBlink 0.8s infinite;
    vertical-align: middle;
}

@keyframes cursorBlink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

/* ========== 飞出卡片 ========== */
.orbit-item.flyout-active {
    transition: all 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
    transform: scale(1.1);
}

.orbit-item.flyout-active .orbit-icon {
    width: 36px;
    height: 36px;
    filter: drop-shadow(0 0 12px rgba(0, 212, 255, 0.8));
}

.orbit-item.flyout-active .orbit-name {
    opacity: 0;
}

.flyout-card {
    position: fixed;
    z-index: 999998;
    opacity: 0;
    transform: scale(0.8) translateY(20px);
    transition: all 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
    pointer-events: none;
}

.flyout-card.visible {
    opacity: 1;
    transform: scale(1) translateY(0);
    pointer-events: auto;
}

.flyout-card-inner {
    background: linear-gradient(135deg, rgba(15, 20, 35, 0.9), rgba(25, 30, 50, 0.9));
    border: 1px solid rgba(0, 212, 255, 0.3);
    border-radius: 12px;
    padding: 12px 16px;
    min-width: 160px;
    max-width: 200px;
    box-shadow: 
        0 10px 30px rgba(0, 0, 0, 0.4),
        0 0 20px rgba(0, 212, 255, 0.15),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(15px);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.flyout-card-icon {
    width: 36px;
    height: 36px;
    object-fit: contain;
    margin-bottom: 8px;
    filter: drop-shadow(0 0 10px rgba(0, 212, 255, 0.4));
}

.flyout-card-title {
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 4px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.flyout-card-desc {
    font-size: 10px;
    color: rgba(255, 255, 255, 0.6);
    line-height: 1.4;
    margin-bottom: 8px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.flyout-card-btn {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 5px 12px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    text-decoration: none;
    border-radius: 15px;
    font-size: 10px;
    font-weight: 500;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(0, 212, 255, 0.3);
}

.flyout-card-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 15px rgba(0, 212, 255, 0.5);
}

/* ========== 左右两侧装饰粒子 ========== */
.side-particles {
    position: fixed;
    top: 0;
    width: 150px;
    height: 100%;
    pointer-events: none;
    z-index: 5;
}

.side-particles.left {
    left: 0;
    background: linear-gradient(to right, rgba(0, 212, 255, 0.03), transparent);
}

.side-particles.right {
    right: 0;
    background: linear-gradient(to left, rgba(255, 0, 255, 0.03), transparent);
}

/* ========== 左右两侧浮动光点 ========== */
.floating-dots {
    position: fixed;
    top: 0;
    width: 200px;
    height: 100%;
    pointer-events: none;
    z-index: 4;
}

.floating-dots.left {
    left: 20px;
}

.floating-dots.right {
    right: 20px;
}

.floating-dot {
    position: absolute;
    width: 4px;
    height: 4px;
    background: var(--primary);
    border-radius: 50%;
    opacity: 0.3;
    animation: dotFloat 8s ease-in-out infinite;
}

.floating-dots.right .floating-dot {
    background: var(--secondary);
}

@keyframes dotFloat {
    0%, 100% {
        transform: translateY(0) scale(1);
        opacity: 0.3;
    }
    50% {
        transform: translateY(-30px) scale(1.5);
        opacity: 0.6;
    }
}

/* ========== 响应式设计 ========== */
@media (max-width: 1200px) {
    .orbit-outer {
        width: 650px;
        height: 650px;
    }
    
    .orbit-inner {
        width: 450px;
        height: 450px;
    }
    
    .center-content {
        width: 320px;
        height: 320px;
    }
}

@media (max-width: 768px) {
    .header {
        padding: 15px 20px;
    }
    
    .orbit-system {
        height: 650px;
    }
    
    .orbit-outer {
        width: 500px;
        height: 500px;
    }
    
    .orbit-inner {
        width: 350px;
        height: 350px;
    }
    
    .orbit-icon {
        width: 26px;
        height: 26px;
    }
    
    .center-content {
        width: 260px;
        height: 260px;
        padding: 30px;
    }
    
    .center-title {
        font-size: 18px;
    }
    
    .center-desc {
        font-size: 11px;
    }
}

@media (max-width: 480px) {
    .orbit-outer {
        width: 360px;
        height: 360px;
    }
    
    .orbit-inner {
        width: 250px;
        height: 250px;
    }
    
    .orbit-icon {
        width: 22px;
        height: 22px;
    }
    
    .center-content {
        width: 200px;
        height: 200px;
        padding: 20px;
    }
    
    .center-title {
        font-size: 14px;
    }
    
    .center-desc {
        font-size: 10px;
    }
}

/* 登录注册弹窗样式 - 科技暗黑风格 */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(8px);
    z-index: 9998;
    display: none;
    align-items: center;
    justify-content: center;
}

.modal-container {
    background: #0f172a;
    border: 1px solid rgba(0, 212, 255, 0.3);
    border-radius: 16px;
    width: 100%;
    max-width: 420px;
    padding: 32px;
    position: relative;
    box-shadow: 0 0 40px rgba(0, 212, 255, 0.15);
    animation: modalFade 0.3s ease;
}

@keyframes modalFade {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    background: none;
    border: none;
    color: #94a3b8;
    font-size: 20px;
    cursor: pointer;
    transition: 0.2s;
}

.modal-close:hover {
    color: #00d4ff;
}

.modal-tabs {
    display: flex;
    margin-bottom: 24px;
    border-bottom: 1px solid rgba(0, 212, 255, 0.2);
}

.modal-tab {
    flex: 1;
    padding: 12px;
    text-align: center;
    background: none;
    border: none;
    color: #94a3b8;
    font-size: 16px;
    cursor: pointer;
    position: relative;
    transition: 0.2s;
}

.modal-tab.active {
    color: #00d4ff;
}

.modal-tab.active::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 100%;
    height: 2px;
    background: #00d4ff;
}

.auth-form {
    display: none;
    flex-direction: column;
    gap: 16px;
}

.auth-form.active {
    display: flex;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-group label {
    color: #cbd5e1;
    font-size: 14px;
}

.form-group input {
    padding: 12px 16px;
    background: rgba(30, 41, 59, 0.6);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: 8px;
    color: #fff;
    outline: none;
    transition: 0.2s;
}

.form-group input:focus {
    border-color: #00d4ff;
    box-shadow: 0 0 0 2px rgba(0, 212, 255, 0.15);
}

.auth-btn {
    padding: 12px;
    background: linear-gradient(90deg, #00d4ff, #ff00ff);
    border: none;
    border-radius: 8px;
    color: #fff;
    font-weight: 600;
    cursor: pointer;
    transition: 0.2s;
    margin-top: 8px;
}

.auth-btn:hover {
    opacity: 0.9;
    transform: translateY(-1px);
}

.auth-tip {
    text-align: center;
    color: #94a3b8;
    font-size: 14px;
    margin-top: 16px;
}

.auth-tip span {
    color: #00d4ff;
    cursor: pointer;
}

/* 头部登录按钮 */
.header-auth {
    display: flex;
    gap: 12px;
    align-items: center;
}

.auth-btn-header {
    padding: 6px 14px;
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid rgba(0, 212, 255, 0.3);
    border-radius: 6px;
    color: #00d4ff;
    font-size: 14px;
    cursor: pointer;
    transition: 0.2s;
}

.auth-btn-header:hover {
    background: rgba(0, 212, 255, 0.2);
}

        .header-auth {
            display: flex;
            gap: 20px;
            align-items: center;
        }
        .auth-link {
            color: #00d4ff;
            font-size: 15px;
            text-decoration: none;
            transition: 0.2s;
        }
        .auth-link:hover {
            color: #fff;
        }

/* 底部版权样式 */
.footer {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: 12px 0;
    background: rgba(15, 23, 42, 0.8);
    border-top: 1px solid rgba(0, 212, 255, 0.2);
    text-align: center;
    z-index: 999;
    color: #94a3b8;
    font-size: 13px;
}
.footer-inner {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 20px;
    flex-wrap: wrap;
}
.footer-link {
    color: #00d4ff;
    cursor: pointer;
    transition: 0.2s;
    text-decoration: none;
}
.footer-link:hover {
    color: #fff;
}


.captcha-input-row {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 100%;
}
.captcha-input-row input {
    flex: 1;
    height: 44px;
    padding: 0 14px;
    border: 1px solid rgba(255,255,255,0.2);
    background: rgba(255,255,255,0.05);
    color: #fff;
    border-radius: 6px;
    outline: none;
}
.captcha-input-row input::placeholder {
    color: rgba(255,255,255,0.4);
}

/* 验证码图片：美观、统一高度、点击刷新 */
.captcha-img {
    height: 44px;
    width: 120px;
    border-radius: 6px;
    cursor: pointer;
    object-fit: cover;
    border: 1px solid rgba(255,255,255,0.2);
    background: rgba(255,255,255,0.05);
}

.captcha-input-row {
    display: flex;
    align-items: center;
    gap: 10px;
}
.captcha-input-row input {
    flex: 1;
    height: 42px;
    padding: 0 12px;
    border: 1px solid #ddd;
    border-radius: 6px;
    outline: none;
}
.captcha-img {
    height: 42px;
    width: 120px;
    border-radius: 6px;
    cursor: pointer;
    border: 1px solid #ddd;
}

/* 欢迎文字统一样式 */
.header-welcome {
    color: #fff;
    font-size: 16px;
    margin-right: 15px;
}

/* 用户名链接美化：去掉下划线、颜色适配、hover效果 */
.header-username {
    color: #00d4ff; /* 和按钮同色系的亮青色 */
    font-weight: 500;
    text-decoration: none; /* 去掉默认下划线 */
    transition: all 0.25s ease;
    position: relative;
}

/* hover时的发光下划线效果，和你的UI风格呼应 */
.header-username::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -2px;
    width: 0;
    height: 1px;
    background: linear-gradient(90deg, #00d4ff, #a855f7);
    transition: width 0.25s ease;
}

.header-username:hover {
    color: #a855f7; /* hover时变成紫色，和按钮渐变呼应 */
    text-shadow: 0 0 8px rgba(0, 212, 255, 0.5);
}

.header-username:hover::after {
    width: 100%;
}

/* 深色主题的 layer.msg 样式 */
.layui-layer-custom-dark-msg {
    background: rgba(30, 40, 60, 0.95) !important;
    color: #fff !important;
    border: 1px solid rgba(0, 200, 255, 0..3);
    box-shadow: 0 0 20px rgba(0, 200, 255, 0.2);
    border-radius: 8px;
}
.layui-layer-custom-dark-msg .layui-layer-content {
    color: #fff !important;
    font-size: 14px;
}

.layui-layer-content,
.layui-layer-title,
.layui-layer-btn a {
    color: #333 !important; /* 改成深灰色，和默认一致 */
}
.layui-layer-btn .layui-layer-btn0 {
    color: #fff !important; /* 按钮文字保持白色 */
}


/* 创建一个伪元素作为下划线 */
.header-username::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: 0;
    left: 0;
    background-color: #00d4ff; /* 下划线颜色 */
    transition: width 0.3s ease;
}

.header-username:hover {
    color: #ffffff;
}

.header-username:hover::after {
    width: 100%; /* 悬停时下划线变长 */
}