/* ============================================
   DOZZON Product Detail Styles v5 — Dark Theme
   ============================================ */
.breadcrumb {
    padding: 100px 60px 24px;
    font-size: 13px;
    color: var(--text-muted);
    max-width: var(--max-width);
    margin: 0 auto;
}
.breadcrumb a { color: var(--text-muted); transition: color var(--transition-fast); }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb span { color: var(--text-secondary); }

/* ==================== Product Hero ==================== */
.product-hero {
    position: relative;
    height: 70vh;
    min-height: 450px;
    max-height: 700px;
    overflow: hidden;
    display: flex;
    align-items: flex-end;
    justify-content: center;
}
.product-hero-bg {
    position: absolute; inset: 0;
    background-size: cover;
    background-position: center;
    transition: transform 6s ease;
    /* 备用背景：如主图加载失败则展示品牌色渐变 */
    background-color: #e8ecf4;
}
/* 移动端 Hero 图片可靠加载：当背景图加载失败时展示渐变 */
.product-hero-bg.error-fallback {
    background-image: none !important;
    background: linear-gradient(135deg, #e0e7f6 0%, #dce8f4 40%, #e4edf8 100%) !important;
}
.product-hero:hover .product-hero-bg { transform: scale(1.03); will-change: transform; }
.product-hero:not(:hover) .product-hero-bg { will-change: auto; }
.product-hero-overlay {
    position: absolute; inset: 0;
    background: linear-gradient(to bottom,
        rgba(250,251,253,0) 0%,
        rgba(250,251,253,0.35) 50%,
        rgba(250,251,253,0.7) 80%,
        rgba(250,251,253,0.9) 100%);
}
.product-hero-content { position: relative; z-index: 2; text-align: center; padding: 0 40px 80px; max-width: 700px; margin: 0 auto; }
.product-hero-tag { display: inline-block; padding: 4px 12px; background: var(--accent-soft); color: var(--accent); font-size: 11px; font-weight: 600; letter-spacing: 0.1em; text-transform: uppercase; border-radius: 3px; margin-bottom: 24px; }
.product-hero-title { font-size: clamp(36px,5vw,64px); font-weight: 700; letter-spacing: -1.5px; margin-bottom: 16px; line-height: 1.1; color: var(--text-primary); }
.product-hero-subtitle { font-size: clamp(16px,2vw,20px); font-weight: 500; color: var(--accent); margin-bottom: 16px; }
.product-hero-desc { font-size: 15px; color: var(--text-secondary); margin-bottom: 36px; max-width: 560px; margin-left: auto; margin-right: auto; line-height: 1.7; }

/* ==================== Section Containers ==================== */
.section-container { max-width: var(--max-width); margin: 0 auto; padding: 100px 60px; }
.section-dark { background: var(--bg-secondary); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.section-label { display: block; font-size: 11px; font-weight: 600; letter-spacing: 0.15em; text-transform: uppercase; color: var(--accent); margin-bottom: 16px; }
.section-container > .section-title { font-size: clamp(28px,3.5vw,40px); font-weight: 700; letter-spacing: -0.8px; color: var(--text-primary); margin-bottom: 12px; line-height: 1.2; }
.section-container > .section-subtitle { font-size: 16px; color: var(--text-muted); margin-bottom: 56px; line-height: 1.7; }

/* ==================== Features Grid ==================== */
.features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--border); border-radius: var(--radius-xl); overflow: hidden; }
.feature-card { padding: 48px 36px; background: var(--bg-primary); transition: all var(--transition); position: relative; }
.feature-card:hover { background: var(--bg-card); }
.feature-icon { display: inline-flex; align-items: center; justify-content: center; width: 44px; height: 44px; background: var(--accent-soft); border-radius: var(--radius); color: var(--accent); margin-bottom: 24px; transition: all var(--transition); }
.feature-card:hover .feature-icon { color: #fff; background: var(--accent); box-shadow: 0 4px 20px var(--accent-glow); }
.feature-card h3 { font-size: 18px; font-weight: 600; margin-bottom: 10px; letter-spacing: -0.3px; }
.feature-card p { font-size: 14px; color: var(--text-muted); line-height: 1.75; }

/* ==================== Specs Table ==================== */
.specs-table { width: 100%; border-collapse: collapse; background: var(--bg-card); border-radius: var(--radius-xl); overflow: hidden; border: 1px solid var(--border); }
.specs-table tr { border-bottom: 1px solid var(--border); transition: background var(--transition-fast); }
.specs-table tr:hover { background: var(--bg-card-hover); }
.specs-table tr:last-child { border-bottom: none; }
.specs-table td { padding: 20px 32px; font-size: 15px; color: var(--text-primary); vertical-align: top; line-height: 1.6; }
.specs-table td:first-child { width: 30%; font-weight: 600; color: var(--accent); letter-spacing: -0.2px; background: var(--bg-secondary); }

/* ==================== Gallery ==================== */
.gallery-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--border); border-radius: var(--radius-xl); overflow: hidden; }
.gallery-item { aspect-ratio: 4/3; background-size: cover; background-position: center; transition: transform 0.5s var(--ease-out); cursor: pointer; position: relative; }
.gallery-item:hover { transform: scale(1.03); z-index: 2; }
/* 第2/3张图使用不同视口裁剪模拟多角度 */
.gallery-item.variant-zoom { background-size: 180%; background-position: center 25%; }
.gallery-item.variant-detail { background-size: 140%; background-position: center 78%; }
/* 第2/3张图无原图时渐变色彩变体 */
.gallery-item.variant-shift { background-size: cover; background-position: center; position: relative; }
.gallery-item.variant-shift::after { content:''; position:absolute; inset:0; background: linear-gradient(135deg, rgba(37,99,235,0.12) 0%, rgba(8,145,178,0.08) 50%, transparent 100%); pointer-events:none; }
.gallery-item::before { content: attr(data-label); position: absolute; bottom: 12px; left: 12px; right: 12px; font-size: 11px; font-weight: 600; color: rgba(255,255,255,0.9); text-shadow: 0 1px 4px rgba(0,0,0,0.5); padding: 4px 10px; border-radius: 4px; background: rgba(0,0,0,0.25); backdrop-filter: blur(4px); -webkit-backdrop-filter: blur(4px); opacity: 0; transition: opacity 0.3s ease; pointer-events: none; }
.gallery-item:hover::before { opacity: 1; }

/* ==================== Scenes ==================== */
.scene-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--border); border-radius: var(--radius-xl); overflow: hidden; }
.scene-card { padding: 48px 36px; background: var(--bg-primary); transition: all var(--transition); }
.scene-card:hover { background: var(--bg-card); }
.scene-card h3 { font-size: 18px; font-weight: 600; margin-bottom: 10px; }
.scene-card p { font-size: 14px; color: var(--text-muted); line-height: 1.75; }

/* ==================== CTA Section ==================== */
.cta-section { padding: 100px 60px; text-align: center; background: var(--bg-primary); border-top: 1px solid var(--border); }
.cta-title { font-size: clamp(28px,3.5vw,40px); font-weight: 700; margin-bottom: 16px; letter-spacing: -0.8px; }
.cta-desc { font-size: 16px; color: var(--text-muted); max-width: 560px; margin: 0 auto 36px; line-height: 1.7; }
.cta-buttons { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

/* Back Nav */
.back-nav { padding: 24px 60px; background: var(--bg-primary); border-top: 1px solid var(--border); max-width: var(--max-width); margin: 0 auto; }
.back-link { display: inline-flex; align-items: center; gap: 8px; font-size: 14px; color: var(--text-muted); transition: all var(--transition-fast); padding: 8px 12px; border-radius: 6px; }
.back-link:hover { color: var(--accent); background: var(--accent-soft); }

/* ==================== Product Series ==================== */
#product-series { padding: 100px 0; max-width: 1400px; margin: 0 auto; padding-left: 60px; padding-right: 60px; }
.series-tabs { display: flex; gap: 4px; margin-top: 32px; margin-bottom: 40px; background: var(--bg-secondary); border-radius: 10px; padding: 4px; width: fit-content; }
.series-tab { padding: 10px 24px; border: none; border-radius: 8px; font-size: 13px; font-weight: 500; font-family: inherit; cursor: pointer; color: var(--text-dim); background: transparent; transition: all 0.3s var(--spring); white-space: nowrap; letter-spacing: -0.01em; }
.series-tab:hover { color: var(--text-secondary); background: rgba(255,255,255,0.04); }
.series-tab.active { color: var(--accent); background: var(--accent-soft); box-shadow: 0 0 12px var(--accent-glow); }
.series-panel { display: none; opacity: 0; transition: opacity 0.35s ease; }
.series-panel.active { display: block; opacity: 1; }
.series-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.series-card { background: var(--bg-card); border-radius: var(--radius-xl); padding: 28px 24px; border: 1px solid var(--border); transition: all 0.4s var(--spring); position: relative; overflow: hidden; cursor: default; }
.series-card::before { content: ''; position: absolute; inset: 0; border-radius: inherit; background: radial-gradient(ellipse at 50% 0%, rgba(0,212,255,0.05) 0%, transparent 60%); opacity: 0; transition: opacity 0.35s ease; pointer-events: none; }
.series-card:hover { background: var(--bg-card-hover); border-color: rgba(0,212,255,0.15); transform: translateY(-3px); box-shadow: 0 8px 24px rgba(0,0,0,0.3), 0 0 20px rgba(0,212,255,0.04); }
.series-card:hover::before { opacity: 1; }
.series-card.fade-up { opacity: 0; transform: translateY(24px); transition: opacity 0.55s var(--ease-out), transform 0.55s var(--ease-out); }
.series-card.fade-up.visible { opacity: 1; transform: translateY(0); }
.series-card:nth-child(1){transition-delay:.05s} .series-card:nth-child(2){transition-delay:.1s} .series-card:nth-child(3){transition-delay:.15s} .series-card:nth-child(4){transition-delay:.2s} .series-card:nth-child(5){transition-delay:.25s} .series-card:nth-child(6){transition-delay:.3s}
.series-card-icon { width: 44px; height: 44px; background: var(--accent-soft); border-radius: 10px; display: flex; align-items: center; justify-content: center; color: var(--accent); margin-bottom: 16px; transition: all 0.35s var(--spring); }
.series-card:hover .series-card-icon { background: var(--accent); color: #fff; transform: scale(1.05); box-shadow: 0 4px 16px var(--accent-glow); }
.series-card-name { font-size: 15px; font-weight: 600; color: var(--text-primary); margin-bottom: 6px; letter-spacing: -0.01em; }
.series-card-desc { font-size: 12px; color: var(--text-dim); line-height: 1.55; }
.series-panel[data-series="aiHealth"] .series-card { border-left: 2px solid transparent; }
.series-panel[data-series="aiHealth"] .series-card:hover { border-left-color: rgba(168,85,247,0.3); }
.series-panel[data-series="aiHealth"] .series-card:hover .series-card-icon { background: linear-gradient(135deg, var(--accent), var(--purple)); color: #fff; box-shadow: 0 4px 20px var(--purple-glow); }

/* ==================== Advantages Grid (Product Page) ==================== */
.advantages-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--border); border-radius: var(--radius-xl); overflow: hidden; }
.advantage-card { padding: 40px 28px; background: var(--bg-primary); transition: all 0.35s var(--spring); position: relative; overflow: hidden; opacity: 0; transform: translateY(20px); }
.advantage-card.visible { opacity: 1; transform: translateY(0); }
.advantage-card:nth-child(1){transition-delay:0s} .advantage-card:nth-child(2){transition-delay:.06s} .advantage-card:nth-child(3){transition-delay:.12s} .advantage-card:nth-child(4){transition-delay:.18s} .advantage-card:nth-child(5){transition-delay:.1s} .advantage-card:nth-child(6){transition-delay:.16s} .advantage-card:nth-child(7){transition-delay:.22s} .advantage-card:nth-child(8){transition-delay:.28s}
.advantage-card:hover { background: var(--bg-card); transform: translateY(-2px); box-shadow: 0 4px 16px rgba(0,0,0,0.3), 0 0 20px rgba(0,212,255,0.04); z-index: 2; }
.advantage-number { font-size: 11px; font-weight: 600; letter-spacing: 0.12em; color: var(--text-dim); margin-bottom: 12px; font-variant-numeric: tabular-nums; font-family: 'SF Mono','JetBrains Mono','Consolas',monospace; }
.advantage-card:hover .advantage-number { color: var(--accent); }
.advantage-card h3 { font-size: 17px; font-weight: 600; color: var(--text-primary); margin-bottom: 8px; letter-spacing: -0.3px; line-height: 1.3; }
.advantage-card p { font-size: 13px; color: var(--text-muted); line-height: 1.7; }
.advantage-icon { display: inline-flex; align-items: center; justify-content: center; width: 36px; height: 36px; background: var(--accent-soft); border-radius: 8px; color: var(--accent); margin-bottom: 14px; transition: all 0.35s var(--spring); }
.advantage-card:hover .advantage-icon { background: var(--accent); color: #fff; transform: scale(1.05); box-shadow: 0 4px 16px var(--accent-glow); }

/* Scroll Reveal */
.section-container > .section-label,.section-container > .section-title,.section-container > .section-subtitle { opacity: 0; transform: translateY(20px); transition: all 0.6s var(--ease-out); }
.section-container > .section-label.visible,.section-container > .section-title.visible,.section-container > .section-subtitle.visible { opacity: 1; transform: translateY(0); }
.feature-card,.scene-card { opacity: 0; transform: translateY(24px); transition: all 0.5s var(--ease-out); }
.feature-card.visible,.scene-card.visible { opacity: 1; transform: translateY(0); }
.feature-card:nth-child(1),.scene-card:nth-child(1){transition-delay:0s} .feature-card:nth-child(2),.scene-card:nth-child(2){transition-delay:.1s} .feature-card:nth-child(3),.scene-card:nth-child(3){transition-delay:.2s} .feature-card:nth-child(4),.scene-card:nth-child(4){transition-delay:.15s} .feature-card:nth-child(5),.scene-card:nth-child(5){transition-delay:.25s} .feature-card:nth-child(6),.scene-card:nth-child(6){transition-delay:.35s}
.specs-table,.gallery-grid { opacity: 0; transform: translateY(20px); transition: all 0.6s var(--ease-out); }
.specs-table.visible,.gallery-grid.visible { opacity: 1; transform: translateY(0); }
.cta-section { opacity: 0; transform: translateY(30px); transition: all 0.7s var(--ease-out); }
.cta-section.visible { opacity: 1; transform: translateY(0); }

/* Product Page Footer */
.product-page-footer { background: var(--bg-dark); padding: 48px 60px 32px; border-top: 1px solid rgba(255,255,255,0.05); }
.product-page-footer .footer-container { max-width: var(--max-width); margin: 0 auto; }
.product-page-footer .footer-bottom { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 16px; padding-top: 24px; border-top: 1px solid rgba(255,255,255,0.06); }
.product-page-footer .copyright { font-size: 12px; color: var(--bg-dark-dim); }
.product-page-footer .copyright a { color: var(--bg-dark-dim); transition: color 0.2s ease; text-decoration: none; }
.product-page-footer .copyright a:hover { color: var(--accent); }
.product-page-footer .footer-links { display: flex; gap: 24px; }
.product-page-footer .footer-links a { font-size: 12px; color: var(--bg-dark-dim); transition: color var(--transition-fast); }
.product-page-footer .footer-links a:hover { color: var(--accent); }
.product-page-footer .footer-bottom p { font-size: 12px; color: var(--bg-dark-dim); }
.product-page-footer .footer-bottom a { font-size: 12px; color: var(--bg-dark-dim); }

/* Responsive */
@media (max-width: 1024px) {
    .features-grid { grid-template-columns: repeat(2,1fr); }
    .gallery-grid { grid-template-columns: repeat(2,1fr); }
    .scene-grid { grid-template-columns: repeat(2,1fr); }
    .section-container { padding: 80px 40px; }
    .product-hero-content { padding: 0 24px 60px; }
    .breadcrumb { padding: 100px 40px 24px; }
    .advantages-grid { grid-template-columns: repeat(2,1fr); }
    .advantage-card { padding: 32px 24px; }
    #product-series { padding-left: 40px; padding-right: 40px; }
}
@media (max-width: 768px) {
    .features-grid { grid-template-columns: 1fr; }
    .gallery-grid { grid-template-columns: 1fr; }
    .gallery-item { aspect-ratio: 16/9; }
    .gallery-item::before { opacity: 1; font-size: 10px; }
    .scene-grid { grid-template-columns: 1fr; }
    .advantages-grid { grid-template-columns: 1fr; }
    .advantage-card { padding: 28px 20px; }
    .specs-table td { display: block; padding: 14px 20px; }
    .specs-table td:first-child { width: 100%; padding-bottom: 4px; font-size: 13px; background: transparent; }
    .specs-table td:last-child { padding-top: 4px; }
    .cta-buttons { flex-direction: column; align-items: center; }
    .cta-buttons .btn { width: 100%; max-width: 300px; }
    .section-container { padding: 60px 24px; }
    #product-series { padding: 60px 24px; }
    .series-grid { grid-template-columns: repeat(2,1fr); }
    .product-page-footer { padding: 32px 24px 24px; }
    .product-page-footer .footer-bottom { flex-direction: column; text-align: center; }
    .footer-links { justify-content: center; flex-wrap: wrap; gap: 16px; }
    .product-hero { height: 55vh; min-height: 360px; max-height: 500px; }
    .product-hero-content { padding: 0 20px 60px; }
    .product-hero-title { font-size: clamp(28px, 6vw, 42px); }
}
@media (max-width: 480px) {
    .product-hero { min-height: 350px; max-height: 450px; }
    .product-hero-title { font-size: 28px; }
    .product-hero-subtitle { font-size: 14px; }
    .product-hero-desc { font-size: 13px; }
    .btn { width: 100%; max-width: none; }
    .section-container { padding: 48px 20px; }
    #product-series { padding: 48px 20px; }
    .series-grid { grid-template-columns: 1fr; }
    .series-tabs { width: 100%; overflow-x: auto; }
    .series-tab { flex-shrink: 0; }
}

/* ---- Accessibility: Reduced Motion ---- */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    .product-hero:hover .product-hero-bg { transform: none; }
    .gallery-item:hover { transform: none; }
    .series-card:hover { transform: none; }
    .advantage-card:hover { transform: none; }
}