/* ========================================
   VioLab 公共样式
   ======================================== */

/* ========================================
   CSS 自定义属性（设计 Token）
   ======================================== */
:root {
    /* 主色调 */
    --color-purple: #7c3aed;
    --color-blue: #3b82f6;
    --color-cyan: #06b6d4;
    --color-green: #22c55e;
    --color-green-light: #4ade80;

    /* 中性色 */
    --color-bg: #000000;
    --color-surface: #111111;
    --color-border: #333333;
    --color-border-subtle: #1e1e1e;
    --color-text: #ffffff;
    --color-text-muted: #888888;
    --color-text-secondary: #aaaaaa;

    /* 间距 */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-2xl: 3.5rem;
    --space-3xl: 4rem;

    /* 圆角 */
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-full: 9999px;

    /* 过渡 */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ========================================
   Sci-fi Background（Canvas + SVG 叠层）
   ======================================== */
.sci-fi-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
}

/* SVG 静态弧线层（绝对定位，铺满容器） */
.arcs-static {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
}

/* Canvas 流动弧线层 */
.arcs-canvas {
    display: block;
    width: 100%;
    height: 100%;
}

/* ── SVG 静态弧线动画 ── */
.arc-static {
    fill: none;
    stroke-dasharray: 3000;
    stroke-dashoffset: 3000;
}

/* 每条弧线独立的 draw-in 延迟：画入后保持静止，不再闪烁 */
.as-1 { animation: drawS 8s 0.0s ease-out forwards; }
.as-3 { animation: drawS 10s 0.3s ease-out forwards; }

@keyframes drawS {
    to { stroke-dashoffset: 0; }
}

/* ========================================
   Status Badge
   ======================================== */
.status-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: var(--space-md);
    transition: all var(--transition-smooth);
    letter-spacing: 0.02em;
    backdrop-filter: blur(8px);
}

.status-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    position: relative;
    flex-shrink: 0;
}

.status-dot::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100%;
    height: 100%;
    border-radius: 50%;
    animation: ripple 2s ease-out infinite;
}

/* 即将上线 - 蓝色主题 */
.status-badge.status-late {
    background: linear-gradient(135deg,
        rgba(59, 130, 246, 0.08) 0%,
        rgba(96, 165, 250, 0.05) 100%);
    color: var(--color-blue);
    border: 1px solid rgba(16, 102, 239, 0.688);
}

.status-badge.status-late .status-dot {
    background-color: var(--color-blue);
    box-shadow: 0 0 6px rgba(59, 130, 246, 0.5);
}

.status-badge.status-late .status-dot::after {
    background-color: rgba(59, 130, 246, 0.3);
}

.status-badge.status-late:hover {
    background: linear-gradient(135deg,
        rgba(59, 130, 246, 0.18) 0%,
        rgba(96, 165, 250, 0.12) 100%);
    border-color: rgba(96, 165, 250, 0.45);
    box-shadow: 0 0 12px rgba(59, 130, 246, 0.15);
}

/* 已上线 - 绿色主题 */
.status-badge.status-online {
    background: linear-gradient(135deg,
        rgba(34, 197, 94, 0.2) 0%,
        rgba(74, 222, 128, 0.15) 100%);
    color: var(--color-green);
    border: 1px solid rgba(34, 197, 94, 0.5);
    box-shadow:
        0 0 15px rgba(34, 197, 94, 0.2),
        inset 0 0 15px rgba(34, 197, 94, 0.05);
    animation: glowPulse 2s ease-in-out infinite;
}

.status-badge.status-online .status-dot {
    background-color: var(--color-green);
    box-shadow:
        0 0 8px rgba(34, 197, 94, 0.8),
        0 0 16px rgba(74, 222, 128, 0.6);
    animation: dotPulse 1.5s ease-in-out infinite;
}

.status-badge.status-online .status-dot::after {
    background-color: rgba(34, 197, 94, 0.5);
}

.status-badge.status-online:hover {
    background: linear-gradient(135deg,
        rgba(34, 197, 94, 0.4) 0%,
        rgba(74, 222, 128, 0.3) 100%);
    border-color: rgba(74, 222, 128, 0.7);
    box-shadow:
        0 0 25px rgba(34, 197, 94, 0.35),
        inset 0 0 20px rgba(34, 197, 94, 0.1);
}

@keyframes glowPulse {
    0%, 100% {
        box-shadow:
            0 0 15px rgba(34, 197, 94, 0.2),
            inset 0 0 15px rgba(34, 197, 94, 0.05);
    }
    50% {
        box-shadow:
            0 0 25px rgba(34, 197, 94, 0.35),
            inset 0 0 20px rgba(34, 197, 94, 0.08);
    }
}

@keyframes dotPulse {
    0%, 100% {
        transform: scale(1);
        box-shadow:
            0 0 8px rgba(34, 197, 94, 0.8),
            0 0 16px rgba(74, 222, 128, 0.6);
    }
    50% {
        transform: scale(1.15);
        box-shadow:
            0 0 12px rgba(34, 197, 94, 1),
            0 0 24px rgba(74, 222, 128, 0.8);
    }
}

@keyframes ripple {
    0%   { transform: translate(-50%, -50%) scale(1); opacity: 1; }
    100% { transform: translate(-50%, -50%) scale(3); opacity: 0; }
}

/* ========================================
   Hero
   ======================================== */
.hero {
    margin-top: var(--space-3xl);
    margin-bottom: 0;
}

/* ========================================
   Cards
   ======================================== */
.cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-sm);
    width: 100%;
}

/* 首页 hero 下方卡片需要更大顶部间距 */
.hero + .cards {
    margin-top: var(--space-xl);
}

.card {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-md);
    text-align: left;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.card:hover {
    border-color: var(--color-purple);
    transform: translateY(-4px);
    box-shadow: 0 10px 30px rgba(124, 58, 237, 0.15);
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(124, 58, 237, 0.1), transparent);
    transition: left 0.5s ease;
}

.card:hover::before {
    left: 100%;
}

/* 已上线卡片 - 绿色主题 */
.card-link {
    text-decoration: none;
    display: block;
}

.card-link::before {
    background: linear-gradient(90deg, transparent, rgba(34, 197, 94, 0.1), transparent);
}

.card-link:hover {
    border-color: #16a34a;
    box-shadow: 0 10px 30px rgba(22, 163, 74, 0.2);
}

.card-link:hover::before {
    left: 100%;
}

.card-icon {
    font-size: 2rem;
    margin-bottom: 0.75rem;
    line-height: 1;
}

.card h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--space-xs);
    color: var(--color-text);
}

.card p {
    color: var(--color-text-muted);
    font-size: 0.8rem;
    line-height: 1.5;
    margin: 0;
}

.card a {
    display: inline-flex;
    align-items: center;
    color: var(--color-text);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    padding: var(--space-xs) var(--space-sm);
    background-color: #222222;
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-border);
    transition: all var(--transition-fast);
}

.card a:hover {
    background-color: #333333;
    border-color: #555555;
}

/* ========================================
   Buttons
   ======================================== */
.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-purple) 0%, var(--color-blue) 100%);
    color: var(--color-text);
    text-decoration: none;
    font-size: 1rem;
    font-weight: 600;
    padding: 0.875rem var(--space-lg);
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    box-shadow: 0 0 20px rgba(124, 58, 237, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 30px rgba(124, 58, 237, 0.5);
}

.btn-large {
    display: inline-block;
    padding: var(--space-sm) 3rem;
    font-size: 1.125rem;
    background: linear-gradient(135deg, var(--color-purple) 0%, var(--color-blue) 100%);
    color: var(--color-text);
    text-decoration: none;
    border-radius: var(--radius-md);
    box-shadow: 0 0 30px rgba(124, 58, 237, 0.3);
    transition: all var(--transition-fast);
}

.btn-large:hover {
    box-shadow: 0 0 50px rgba(124, 58, 237, 0.5);
    transform: translateY(-2px);
}

/* ========================================
   Container（实验页面）
   ======================================== */
.coming-soon-container {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 900px;
    margin: 0 auto;
}

/* 连续区块之间的分隔线 */
.coming-soon-container + .coming-soon-container {
    margin-top: var(--space-2xl);
    padding-top: var(--space-2xl);
    border-top: 1px solid var(--color-border-subtle);
}

/* ========================================
   Feature Preview
   ======================================== */
.feature-preview {
    margin-bottom: var(--space-lg);
}

.feature-preview:last-child {
    margin-bottom: 0;
}

.feature-preview h2 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--space-md);
    color: var(--color-text);
}

/* ========================================
   Divider
   ======================================== */
.divider {
    height: 1px;
    background: linear-gradient(to right, transparent, var(--color-border), transparent);
    margin: var(--space-xl) 0;
}

/* ========================================
   Notify Section
   ======================================== */
.notify-section {
    text-align: center;
    margin-bottom: var(--space-lg);
}

.notify-section p {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-md);
    font-size: 1rem;
}

.benefit-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-sm) var(--space-lg);
}

.benefit-list li {
    color: var(--color-text-muted);
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

/* ========================================
   CTA Section
   ======================================== */
.cta-section {
    text-align: center;
    margin-top: var(--space-lg);
}

/* ========================================
   About Page
   ======================================== */
.about-container {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 900px;
    margin: 0 auto;
    text-align: left;
}

.about-header {
    text-align: center;
    margin-bottom: var(--space-xl);
}

.about-header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--space-xs);
}

.about-subtitle {
    font-size: 1.25rem;
    color: var(--color-text-muted);
}

.about-content {
    display: flex;
    flex-direction: column;
    gap: var(--space-xl);
}

.about-section {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
}

.about-section h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--space-sm);
    color: var(--color-text);
}

.about-section p {
    color: var(--color-text-secondary);
    line-height: 1.8;
    font-size: 1rem;
}

.feature-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.feature-list li {
    color: var(--color-text-secondary);
    padding: 0.75rem 0;
    border-bottom: 1px solid #222222;
    line-height: 1.6;
}

.feature-list li:last-child {
    border-bottom: none;
}

.feature-list strong {
    color: var(--color-text);
}

.about-cta {
    text-align: center;
    margin-top: var(--space-xl);
}

/* ========================================
   实验表单（Filename 等）
   ======================================== */
.filename-container {
    display: flex;
    align-items: center;
}

.filename-container .factor-input {
    margin-right: 5px;
}

.filename-extension {
    font-size: 15px;
    color: #f9f9f9;
}

/* ========================================
   响应式 - 平板（≤768px）
   ======================================== */
@media (max-width: 768px) {
    /* Hero */
    .hero {
        margin-top: var(--space-lg);
    }

    /* Cards */
    .cards {
        grid-template-columns: 1fr;
        gap: 0.75rem;
    }

    .hero + .cards {
        margin-top: var(--space-lg);
    }

    .card {
        padding: var(--space-sm);
    }

    .card h3 {
        font-size: 0.95rem;
    }

    .card p {
        font-size: 0.8rem;
    }

    /* Container 分隔 */
    .coming-soon-container + .coming-soon-container {
        margin-top: var(--space-lg);
        padding-top: var(--space-lg);
    }

    /* About */
    .about-container {
        padding: 0 var(--space-sm);
    }

    .about-header {
        margin-bottom: var(--space-lg);
    }

    .about-header h1 {
        font-size: 1.75rem;
    }

    .about-subtitle {
        font-size: 1rem;
    }

    .about-content {
        gap: var(--space-md);
    }

    .about-section {
        padding: 1.25rem;
        border-radius: var(--radius-md);
    }

    .about-section h2 {
        font-size: 1.25rem;
    }

    .about-section p {
        font-size: 0.9rem;
        line-height: 1.6;
    }

    .feature-list li {
        padding: var(--space-xs) 0;
        font-size: 0.9rem;
    }

    .about-cta {
        margin-top: var(--space-lg);
    }

    /* Buttons */
    .btn-large {
        padding: 0.875rem var(--space-lg);
        font-size: 1rem;
        width: 100%;
        max-width: 280px;
    }

    /* Sci-fi BG */
    .sci-fi-bg {
        opacity: 0.4;
    }

    /* Notify */
    .benefit-list {
        flex-direction: column;
        align-items: center;
    }
}

/* ========================================
   响应式 - 手机（≤480px）
   ======================================== */
@media (max-width: 480px) {
    .hero {
        margin-top: var(--space-md);
    }

    .coming-soon-container + .coming-soon-container {
        margin-top: var(--space-md);
        padding-top: var(--space-md);
    }

    .about-header h1 {
        font-size: 1.5rem;
    }

    .about-section {
        padding: var(--space-sm);
    }

    .about-section h2 {
        font-size: 1.1rem;
    }

    .about-section p {
        font-size: 0.85rem;
    }

    .feature-list li {
        font-size: 0.85rem;
    }

    .card-icon {
        font-size: 1.5rem;
    }

    .btn-large {
        padding: 0.75rem var(--space-md);
        font-size: 0.9rem;
    }
}