/* ===== 加载动画 ===== */
.loading-box {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: #050510;
    z-index: 99999;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.8s ease, visibility 0.8s ease;
}

.loading-box.hide {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.loading-core {
    text-align: center;
    position: relative;
}

.loading-ring {
    width: 80px;
    height: 80px;
    border: 2px solid rgba(0, 212, 255, 0.15);
    border-top-color: var(--accent);
    border-radius: 50%;
    margin: 0 auto 1.5rem;
    animation: spin 1s linear infinite;
    position: relative;
}

.loading-ring.ring2 {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 60px;
    margin-top: 10px;
    border-color: rgba(123, 44, 191, 0.15);
    border-bottom-color: var(--accent-secondary);
    animation: spin 1.5s linear infinite reverse;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.loading-ring.ring2 {
    animation: spin-reverse 1.5s linear infinite;
}

@keyframes spin-reverse {
    to { transform: translateX(-50%) rotate(-360deg); }
}

.loading-text {
    color: var(--text-secondary);
    font-size: 0.8rem;
    letter-spacing: 3px;
    margin-bottom: 1rem;
    animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 0.5; }
    50% { opacity: 1; }
}

.loading-bar {
    width: 160px;
    height: 2px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 2px;
    margin: 0 auto;
    overflow: hidden;
}

.loading-bar-inner {
    width: 0%;
    height: 100%;
    background: linear-gradient(90deg, var(--accent), var(--accent-secondary));
    border-radius: 2px;
    animation: loadingProgress 1.5s ease forwards;
}

@keyframes loadingProgress {
    to { width: 100%; }
}

/* ===== 入场动画 ===== */
.animate-fade-up {
    opacity: 0;
    transform: translateY(40px);
    animation: fadeUp 0.9s cubic-bezier(0.2, 0.8, 0.2, 1) forwards;
}

@keyframes fadeUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s cubic-bezier(0.2, 0.8, 0.2, 1),
                transform 0.8s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.animate-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}

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

/* 壁纸层 - page7 半透明 */
.bg-wallpaper {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('../images/page7.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    opacity: 0.45;
    filter: blur(1px);
    z-index: 0;
}

/* 壁纸遮罩 - 保证文字可读性 */
.bg-wallpaper::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(0,0,0,0.15), rgba(0,0,0,0.3));
}

#particleCanvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.grid-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        linear-gradient(var(--grid-color, rgba(0, 212, 255, 0.03)) 1px, transparent 1px),
        linear-gradient(90deg, var(--grid-color, rgba(0, 212, 255, 0.03)) 1px, transparent 1px);
    background-size: 50px 50px;
    mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
    -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
    z-index: 2;
}

.glow-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.4;
    animation: orbFloat 20s ease-in-out infinite;
    z-index: 1;
}

.orb1 {
    width: 400px;
    height: 400px;
    background: var(--accent);
    top: -100px;
    left: -100px;
}

.orb2 {
    width: 350px;
    height: 350px;
    background: var(--accent-secondary);
    bottom: -80px;
    right: -80px;
    animation-delay: -10s;
}

@keyframes orbFloat {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(50px, -30px) scale(1.1); }
    66% { transform: translate(-30px, 40px) scale(0.95); }
}

/* ===== 主题切换过渡 ===== */
.theme-transition {
    animation: themeFade 0.8s ease;
}

@keyframes themeFade {
    0% { opacity: 0.6; filter: brightness(1.2); }
    100% { opacity: 1; filter: brightness(1); }
}

/* ===== 光标闪烁 ===== */
.name-cursor {
    display: inline-block;
    animation: blink 1s step-end infinite;
    color: var(--accent);
}

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

/* ===== 音乐波形 ===== */
.music-wave {
    display: none;
    align-items: flex-end;
    gap: 2px;
    height: 14px;
}

.music-wave i {
    width: 2px;
    background: var(--accent);
    border-radius: 1px;
    animation: wave 0.8s ease-in-out infinite;
}

.music-wave i:nth-child(2) { animation-delay: 0.2s; }
.music-wave i:nth-child(3) { animation-delay: 0.4s; }

.music-btn.playing .music-icon { display: none; }
.music-btn.playing .music-wave { display: flex; }

@keyframes wave {
    0%, 100% { height: 4px; }
    50% { height: 14px; }
}

/* ===== 暗黑模式按钮图标切换 ===== */
.dark-btn .icon-sun { display: none; }
.dark-btn .icon-moon { display: inline; }
[data-dark="true"] .dark-btn .icon-sun { display: inline; }
[data-dark="true"] .dark-btn .icon-moon { display: none; }

/* ===== 滚动提示 ===== */
.scroll-arrow {
    animation: scrollBounce 2s ease-in-out infinite;
}

@keyframes scrollBounce {
    0%, 100% { transform: translateY(0); opacity: 0.5; }
    50% { transform: translateY(8px); opacity: 1; }
}

/* ===== 数字计数动画 ===== */
.stat-num {
    display: block;
    font-size: 1.8rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent), var(--accent-secondary));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* ===== 减少动画偏好 ===== */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}