/* ============================================================
   styles.html / scenes.html / tutorials.html 共享样式
   2026-06-09 美化: card-grid / genre-card / scene-card / tutorial-card / cta
   ============================================================ */

/* Hero 区: 大标题 + 副标题 */
.page-hero {
    text-align: center;
    padding: 100px 24px 80px;
    position: relative;
    overflow: hidden;
}

.page-hero::before {
    content: '';
    position: absolute;
    top: -200px;
    left: 50%;
    transform: translateX(-50%);
    width: 900px;
    height: 900px;
    background: radial-gradient(circle,
        rgba(99, 102, 241, 0.45) 0%,
        rgba(139, 92, 246, 0.3) 35%,
        rgba(236, 72, 153, 0.15) 65%,
        transparent 85%);
    border-radius: 50%;
    filter: blur(60px);
    z-index: 0;
    pointer-events: none;
    animation: hero-pulse 8s ease-in-out infinite alternate;
}

@keyframes hero-pulse {
    0%   { transform: translateX(-50%) scale(1);   opacity: 0.7; }
    100% { transform: translateX(-50%) scale(1.1); opacity: 1; }
}

.page-hero h1 {
    font-size: 3.4em;
    font-weight: 800;
    background: linear-gradient(135deg, #818cf8 0%, #c084fc 35%, #f472b6 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 18px;
    position: relative;
    z-index: 1;
    text-shadow: 0 0 60px rgba(139, 92, 246, 0.3);
    letter-spacing: -0.02em;
}

.page-hero .lead {
    font-size: 1.15em;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto;
    line-height: 1.7;
    position: relative;
    z-index: 1;
}

/* 容器 */
.page-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px 80px;
}

/* 章节标题 (风格分类 / 场景分类 / 教程章节) */
.section-block {
    margin-bottom: 60px;
}

.section-block h2 {
    font-size: 1.6em;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 28px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 12px;
}

.section-block h2::before {
    content: '';
    width: 4px;
    height: 24px;
    background: var(--gradient-primary);
    border-radius: 2px;
}

/* 卡片网格 */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 20px;
}

/* 风格卡片 (styles.html) */
.genre-card {
    display: flex;
    flex-direction: column;
    padding: 24px 20px;
    background: linear-gradient(180deg, var(--bg-card) 0%, rgba(26, 26, 36, 0.6) 100%);
    border: 1.5px solid var(--border-light);
    border-radius: var(--radius-md);
    text-decoration: none;
    color: var(--text-primary);
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}

.genre-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s ease;
}

.genre-card:hover {
    background: var(--bg-hover);
    border-color: var(--accent-primary);
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.genre-card:hover::before {
    transform: scaleX(1);
}

.genre-card h3 {
    font-size: 1.1em;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.genre-card p {
    font-size: 0.88em;
    color: var(--text-secondary);
    line-height: 1.5;
    margin: 0;
}

/* 场景卡片 (scenes.html) */
.scene-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 32px 20px;
    background: linear-gradient(180deg, var(--bg-card) 0%, rgba(26, 26, 36, 0.6) 100%);
    border: 1.5px solid var(--border-light);
    border-radius: var(--radius-lg);
    text-decoration: none;
    color: var(--text-primary);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.scene-card::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
    opacity: 0;
    transition: opacity 0.4s ease;
    pointer-events: none;
}

.scene-card:hover {
    background: var(--bg-hover);
    border-color: var(--accent-primary);
    transform: translateY(-4px) scale(1.02);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.scene-card:hover::before {
    opacity: 0.5;
}

.scene-card .scene-icon {
    font-size: 2.8em;
    margin-bottom: 12px;
    display: block;
    line-height: 1;
    filter: drop-shadow(0 4px 12px rgba(99, 102, 241, 0.3));
    transition: transform 0.3s ease;
}

.scene-card:hover .scene-icon {
    transform: scale(1.15) rotate(-5deg);
}

.scene-card h3 {
    font-size: 1.05em;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
    position: relative;
    z-index: 1;
}

.scene-card p {
    font-size: 0.85em;
    color: var(--text-secondary);
    line-height: 1.55;
    margin: 0;
    position: relative;
    z-index: 1;
}

/* 教程卡片 (tutorials.html) */
.tutorial-card {
    display: flex;
    flex-direction: column;
    padding: 24px 20px;
    background: linear-gradient(180deg, var(--bg-card) 0%, rgba(26, 26, 36, 0.6) 100%);
    border: 1.5px solid var(--border-light);
    border-radius: var(--radius-md);
    text-decoration: none;
    color: var(--text-primary);
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}

.tutorial-card:hover {
    background: var(--bg-hover);
    border-color: var(--accent-primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.tutorial-card .level-badge {
    display: inline-block;
    align-self: flex-start;
    padding: 4px 10px;
    font-size: 0.72em;
    font-weight: 600;
    border-radius: 999px;
    margin-bottom: 12px;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

/* 入门徽章: 绿色 (易) */
.tutorial-card .level-badge:has-text("入门"),
.tutorial-card .level-badge[class*="beginner"] {
    background: rgba(34, 197, 94, 0.15);
    color: #4ade80;
    border: 1px solid rgba(34, 197, 94, 0.3);
}

.tutorial-card h3 {
    font-size: 1.05em;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
    line-height: 1.4;
}

.tutorial-card p {
    font-size: 0.85em;
    color: var(--text-secondary);
    line-height: 1.55;
    margin: 0;
}

/* 顶部 nav (复用) */
.page-nav {
    height: var(--topbar-height);
    background: rgba(10, 10, 15, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 32px;
    position: sticky;
    top: 0;
    z-index: 100;
}

.page-nav .logo {
    font-size: 1.1em;
    font-weight: 600;
    color: var(--text-primary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 8px;
}

.page-nav .nav-links {
    display: flex;
    align-items: center;
    gap: 28px;
}

.page-nav .nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.95em;
    font-weight: 500;
    transition: color 0.2s ease;
    position: relative;
}

.page-nav .nav-links a:hover,
.page-nav .nav-links a.active {
    color: var(--text-primary);
}

.page-nav .nav-links a.active::after {
    content: '';
    position: absolute;
    bottom: -22px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient-primary);
    border-radius: 1px;
}

.page-nav .nav-links a.btn-primary {
    background: var(--gradient-primary);
    color: var(--white, #fff);
    padding: 8px 20px;
    border-radius: var(--radius-sm);
    font-weight: 600;
}

.page-nav .nav-links a.btn-primary:hover {
    box-shadow: var(--shadow-glow);
    transform: translateY(-1px);
}

/* CTA 区 (页面底部) */
.cta-section {
    text-align: center;
    padding: 60px 24px;
    margin-top: 40px;
    background: var(--gradient-glow);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    position: relative;
    overflow: hidden;
}

.cta-section h2 {
    font-size: 2em;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.cta-section p {
    font-size: 1.1em;
    color: var(--text-secondary);
    margin-bottom: 28px;
}

.cta-section .btn-large {
    display: inline-block;
    padding: 14px 36px;
    font-size: 1.05em;
    font-weight: 600;
    text-decoration: none;
    border-radius: var(--radius-md);
    margin: 0 8px;
    transition: all 0.25s ease;
}

.cta-section .btn-primary.btn-large {
    background: var(--gradient-primary);
    color: #fff;
    box-shadow: var(--shadow-glow);
}

.cta-section .btn-primary.btn-large:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 32px rgba(99, 102, 241, 0.4);
}

.cta-section .btn-secondary {
    background: var(--bg-card);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.cta-section .btn-secondary:hover {
    background: var(--bg-hover);
    border-color: var(--accent-primary);
}

/* Footer */
.page-footer {
    text-align: center;
    padding: 32px 24px;
    color: var(--text-muted);
    font-size: 0.88em;
    border-top: 1px solid var(--border-color);
    margin-top: 40px;
}

.page-footer a {
    color: var(--text-secondary);
    text-decoration: none;
    margin: 0 8px;
    transition: color 0.2s ease;
}

.page-footer a:hover {
    color: var(--accent-primary);
}

/* 响应式 */
@media (max-width: 768px) {
    .page-hero {
        padding: 50px 20px 40px;
    }
    .page-hero h1 {
        font-size: 2.2em;
    }
    .page-hero .lead {
        font-size: 1em;
    }
    .page-container {
        padding: 0 16px 60px;
    }
    .card-grid {
        grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
        gap: 14px;
    }
    .genre-card, .scene-card, .tutorial-card {
        padding: 18px 14px;
    }
    .scene-card .scene-icon {
        font-size: 2.2em;
    }
    .page-nav {
        padding: 0 16px;
    }
    .page-nav .nav-links {
        gap: 14px;
    }
    .page-nav .nav-links a:not(.btn-primary) {
        display: none;
    }
    .section-block h2 {
        font-size: 1.35em;
    }
    .cta-section h2 {
        font-size: 1.5em;
    }
    .cta-section .btn-large {
        display: block;
        margin: 8px auto;
        max-width: 280px;
    }
}

@media (max-width: 480px) {
    .card-grid {
        grid-template-columns: 1fr 1fr;
    }
    .scene-card {
        padding: 20px 12px;
    }
}