/* ============================================
   神笔SVG - 样式文件
   ============================================ */

/* 选中文字样式 */
::selection { background: #07c16025; color: #062a17; }

/* ============================================
   动画关键帧
   ============================================ */

@keyframes ping-slow {
    0% { transform: scale(1); opacity: 1; }
    75%, 100% { transform: scale(2); opacity: 0; }
}
.animate-ping-slow { animation: ping-slow 2s cubic-bezier(0, 0, 0.2, 1) infinite; }

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-8px); }
}
.animate-float { animation: float 4s ease-in-out infinite; }
.animate-float-delay { animation: float 4s ease-in-out 1s infinite; }

@keyframes pulse-ring {
    0% { transform: scale(0.8); opacity: 1; }
    100% { transform: scale(2.2); opacity: 0; }
}
.animate-pulse-ring { animation: pulse-ring 1.5s ease-out infinite; }

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0; }
}
.cursor-blink { animation: blink 1s step-end infinite; }

@keyframes fade-in-up {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes slide-in-left {
    from { opacity: 0; transform: translateX(-40px); }
    to { opacity: 1; transform: translateX(0); }
}

@keyframes slide-in-right {
    from { opacity: 0; transform: translateX(40px); }
    to { opacity: 1; transform: translateX(0); }
}

/* ============================================
   背景图案
   ============================================ */

.grid-bg {
    background-image: linear-gradient(rgba(255,255,255,0.035) 1px, transparent 1px),
                      linear-gradient(90deg, rgba(255,255,255,0.035) 1px, transparent 1px);
    background-size: 52px 52px;
}

.dot-bg {
    background-image: radial-gradient(rgba(81,225,142,0.38) 1px, transparent 1px);
    background-size: 22px 22px;
}

.glow-green {
    background: radial-gradient(circle, rgba(7,193,96,0.1) 0%, transparent 70%);
}

.glow-green-light {
    background: radial-gradient(circle, rgba(7,193,96,0.1) 0%, transparent 70%);
}

/* ============================================
   移动端菜单
   ============================================ */

.mobile-menu {
    transform: translateX(100%);
    transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}
.mobile-menu.open { transform: translateX(0); }

.mobile-overlay {
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}
.mobile-overlay.open { opacity: 1; pointer-events: auto; }

/* ============================================
   导航链接
   ============================================ */

.nav-link { position: relative; }
.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: #07c160;
    transition: width 0.3s ease;
    border-radius: 1px;
}
.nav-link:hover::after,
.nav-link.active::after { width: 100%; }

/* ============================================
   滚动动画
   ============================================ */

.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}
.reveal.active { opacity: 1; transform: translateY(0); }

.reveal-left {
    opacity: 0;
    transform: translateX(-40px);
    transition: all 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}
.reveal-left.active { opacity: 1; transform: translateX(0); }

.reveal-right {
    opacity: 0;
    transform: translateX(40px);
    transition: all 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}
.reveal-right.active { opacity: 1; transform: translateX(0); }

.reveal-scale {
    opacity: 0;
    transform: scale(0.92);
    transition: all 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}
.reveal-scale.active { opacity: 1; transform: scale(1); }

/* 子元素交错动画 */
.stagger > * {
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}
.stagger.active > *:nth-child(1) { opacity: 1; transform: translateY(0); transition-delay: 0s; }
.stagger.active > *:nth-child(2) { opacity: 1; transform: translateY(0); transition-delay: 0.1s; }
.stagger.active > *:nth-child(3) { opacity: 1; transform: translateY(0); transition-delay: 0.2s; }
.stagger.active > *:nth-child(4) { opacity: 1; transform: translateY(0); transition-delay: 0.3s; }

/* ============================================
   返回顶部按钮
   ============================================ */

.back-to-top {
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.3s ease;
    pointer-events: none;
}
.back-to-top.visible {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

/* ============================================
   仪表盘光晕效果
   ============================================ */

.dashboard-glow {
    position: absolute;
    inset: -10px;
    background: radial-gradient(circle, rgba(7,193,96,0.1) 0%, transparent 70%);
    border-radius: 36px;
    z-index: -1;
    filter: blur(40px);
}

/* ============================================
   步骤连接线
   ============================================ */

.step-line {
    position: absolute;
    left: 50%;
    top: 36px;
    height: 40px;
    width: 1px;
    background: rgba(255,255,255,0.1);
    transform: translateX(-50%);
}

/* ============================================
   代码区域
   ============================================ */

.code-line {
    overflow: hidden;
    white-space: nowrap;
}

/* ============================================
   Hero 神经网络背景 (AI 智能主题)
   ============================================ */

.nn-line {
    stroke: #07c160;
    stroke-opacity: 0.16;
    stroke-width: 1;
}

.nn-flow {
    stroke: #36dc7c;
    stroke-opacity: 0.5;
    stroke-width: 1.2;
    stroke-linecap: round;
    stroke-dasharray: 4 12;
    animation: dash-flow 4s linear infinite;
}

@keyframes dash-flow {
    to { stroke-dashoffset: -96; }
}

.nn-node {
    fill: #07c160;
    fill-opacity: 0.4;
}

.nn-node-hl {
    fill: #36dc7c;
    fill-opacity: 0.9;
    animation: node-pulse 3s ease-in-out infinite;
}

@keyframes node-pulse {
    0%, 100% { fill-opacity: 0.3; }
    50% { fill-opacity: 1; }
}

.nn-ring {
    fill: none;
    stroke: #36dc7c;
    stroke-width: 1;
    transform-box: fill-box;
    transform-origin: center;
    animation: ring-expand 3.5s ease-out infinite;
}

@keyframes ring-expand {
    0%   { transform: scale(0.35); stroke-opacity: 0.5; }
    100% { transform: scale(2.2);  stroke-opacity: 0; }
}

/* 无障碍：尊重系统「减弱动效」偏好 */
@media (prefers-reduced-motion: reduce) {
    .nn-flow,
    .nn-node-hl,
    .nn-ring { animation: none; }
}

/* ============================================
   响应式工具类
   ============================================ */

@media (max-width: 640px) {
    .mobile-hide { display: none; }
}

@media (min-width: 641px) {
    .desktop-hide { display: none; }
}