/* 
   ========================================
   PP Box Factory - Industrial Premium Design System
   High-end Industrial Minimalism
   ========================================
*/

/* ========== 1. Design Tokens ========== */
:root {
    /* 工业风配色 - Industrial Palette */
    --color-primary: #3B82F6;        /* Electric Blue - CTA */
    --color-primary-dark: #2563EB;   /* Hover state */
    --color-primary-light: #EFF6FF;  /* Subtle backgrounds */
    --color-accent: #0a0a0a;         /* Deep Black - Headlines */
    --color-accent-gold: #d4af37;    /* Amber Gold - Premium accent */
    --color-accent-steel: #1a1a2e;   /* Steel Gray - Industrial */
    --color-accent-navy: #16213e;    /* Deep Navy - Secondary */
    
    /* 深色工业风背景 */
    --color-bg-dark: #0a0a0a;
    --color-bg-industrial: #111111;
    --color-surface-dark: #1a1a1a;
    
    /* Neutrals - No pure black/white */
    --color-bg: #F8FAFC;             /* Off-white background */
    --color-surface: #FFFFFF;        /* Card surfaces */
    --color-text: #334155;           /* Body text - slate */
    --color-text-muted: #64748B;     /* Secondary text */
    --color-text-light: #f0f0f0;     /* Light text on dark bg */
    --color-border: #E2E8F0;         /* Subtle borders */
    --color-border-hover: #CBD5E1;
    --color-border-dark: rgba(255,255,255,0.1);
    
    /* Typography - Premium Fonts */
    --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-display: 'Montserrat', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    
    /* 标题颜色 - Dark Slate (非纯黑) */
    --color-heading: #1e293b;
    
    /* Shadows - Deep Industrial */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 12px -2px rgba(0, 0, 0, 0.08), 0 2px 6px -1px rgba(0, 0, 0, 0.04);
    --shadow-lg: 0 12px 24px -4px rgba(0, 0, 0, 0.12), 0 4px 8px -2px rgba(0, 0, 0, 0.06);
    --shadow-xl: 0 24px 48px -12px rgba(0, 0, 0, 0.18), 0 12px 24px -8px rgba(0, 0, 0, 0.1);
    --shadow-glow: 0 0 30px rgba(212, 175, 55, 0.2);
    --shadow-glow-blue: 0 0 20px rgba(59, 130, 246, 0.15);
    --shadow-industrial: 0 8px 32px rgba(0, 0, 0, 0.2);
    
    /* Spacing & Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
}

/* ========== 2. Base Reset ========== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { 
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body { 
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text);
    background: var(--color-bg);
    letter-spacing: 0.01em;
    font-stretch: normal;
    font-weight: 400;
    -webkit-text-size-adjust: 100%;
}

img { max-width: 100%; height: auto; display: block; }
a { text-decoration: none; color: inherit; transition: all 0.2s ease; }
ul, ol { list-style: none; }

/* ========== 3. Typography - Premium ========== */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    color: var(--color-heading);
    font-weight: 700;
    letter-spacing: normal;
    line-height: 1.3;
    font-stretch: normal;
}

h1 { 
    font-size: clamp(2.5rem, 5vw, 3.5rem);
    font-weight: 700;
    letter-spacing: -0.01em;
}
h2 { 
    font-size: clamp(1.75rem, 3vw, 2.5rem);
    font-weight: 600;
}
h3 { 
    font-size: 1.25rem;
    font-weight: 600;
}
h4 { font-size: 1.125rem; font-weight: 600; }
h5 { font-size: 1rem; font-weight: 600; }
h6 { font-size: 0.875rem; font-weight: 600; }

p { 
    color: var(--color-text);
    line-height: 1.7;
    letter-spacing: 0.01em;
}
.text-muted { color: var(--color-text-muted); }

/* ========== 4. Layout Utilities ========== */
.container { 
    max-width: 1200px; 
    margin: 0 auto; 
    padding: 0 24px; 
}

.section { 
    padding: 100px 0; 
}

.section-header { 
    text-align: center; 
    margin-bottom: 60px; 
}
.section-header h2 { margin-bottom: 16px; }
.section-header p { 
    color: var(--color-text-muted); 
    max-width: 600px; 
    margin: 0 auto;
    font-size: 1.1rem;
}

/* ========== 5. Buttons - Premium ========== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 28px;
    font-family: var(--font-sans);
    font-size: 0.95rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    border-radius: var(--radius-md);
    border: 2px solid transparent;
    cursor: pointer;
    transition: all 0.25s ease;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: white;
    border-color: var(--color-primary);
    box-shadow: var(--shadow-md), inset 0 1px 0 rgba(255,255,255,0.15);
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.btn-outline {
    background: transparent;
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
    font-weight: 600;
}
.btn-outline:hover {
    background: var(--color-primary);
    color: white;
    transform: translateY(-2px);
}

.btn-sm { padding: 10px 20px; font-size: 0.875rem; }
.btn-block { width: 100%; }
.btn.added { 
    background: linear-gradient(135deg, #10B981 0%, #059669 100%) !important; 
    border-color: #10B981 !important;
    pointer-events: auto;
}

/* 移除按钮状态（红色） */
.btn.btn-danger {
    background: linear-gradient(135deg, #EF4444 0%, #DC2626 100%) !important;
    border-color: #EF4444 !important;
    color: white !important;
}
.btn.btn-danger:hover {
    background: linear-gradient(135deg, #DC2626 0%, #B91C1C 100%) !important;
    transform: translateY(-2px);
}

/* ========== 6. Header - Glassmorphism ========== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 72px;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(226, 232, 240, 0.8);
    z-index: 1000;
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
}

.logo {
    font-family: var(--font-display);
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--color-accent);
    letter-spacing: -0.03em;
}

.nav { display: flex; gap: 36px; }
.nav a {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--color-text-muted);
    position: relative;
}
.nav a:hover, .nav a.active { color: var(--color-accent); }
.nav a.active::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--color-primary);
    border-radius: 1px;
}

.header-actions { display: flex; align-items: center; gap: 24px; }
.mobile-menu-btn { display: none; font-size: 24px; background: none; border: none; cursor: pointer; color: var(--color-accent); }
.mobile-menu { display: none; }

/* Language Selector */
.lang-selector { position: relative; }
.lang-btn { background: none; border: none; font-weight: 500; color: var(--color-text-muted); cursor: pointer; display: flex; align-items: center; gap: 4px; font-size: 0.9rem; }
.lang-dropdown { position: absolute; top: calc(100% + 8px); right: 0; background: var(--color-surface); border: 1px solid var(--color-border); box-shadow: var(--shadow-lg); border-radius: var(--radius-md); display: none; min-width: 140px; overflow: hidden; }
.lang-selector:hover .lang-dropdown { display: block; }
.lang-dropdown a { display: block; padding: 12px 16px; font-size: 0.9rem; color: var(--color-text); }
.lang-dropdown a:hover { background: var(--color-primary-light); color: var(--color-primary); }

/* Quote Basket */
.basket-icon { display: flex; align-items: center; gap: 8px; font-weight: 500; color: var(--color-text-muted); font-size: 0.9rem; }
.basket-icon ion-icon { font-size: 1.2rem; }
.basket-count { background: var(--color-primary); color: white; font-size: 0.7rem; padding: 2px 7px; border-radius: 10px; font-weight: 600; }

/* ========== 7. Hero Section - Premium ========== */
.hero {
    position: relative;
    padding-top: 72px;
    min-height: 85vh;
    display: flex;
    align-items: center;
    background: linear-gradient(180deg, var(--color-bg) 0%, #EEF2FF 100%);
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 80%;
    height: 150%;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.08) 0%, transparent 60%);
    pointer-events: none;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}
.hero-bg img { width: 100%; height: 100%; object-fit: cover; opacity: 0.15; }

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 720px;
    padding: 48px;
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(20px);
    border-radius: var(--radius-xl);
    border: 1px solid rgba(255, 255, 255, 0.8);
    box-shadow: var(--shadow-xl);
}

.hero h1 { margin-bottom: 20px; }
.hero p { font-size: 1.2rem; color: var(--color-text-muted); margin-bottom: 32px; }
.hero-btns { display: flex; gap: 16px; flex-wrap: wrap; }

/* ========== 8. Trust Bar ========== */
.trust-bar {
    background: var(--color-surface);
    padding: 32px 0;
    border-bottom: 1px solid var(--color-border);
}
.trust-grid { display: flex; justify-content: center; flex-wrap: wrap; gap: 48px; }
.trust-item { display: flex; align-items: center; gap: 12px; color: var(--color-text-muted); font-weight: 500; font-size: 0.95rem; }
.trust-item ion-icon { font-size: 1.4rem; color: var(--color-primary); }

/* ========== 9. Product Cards - Bento Style ========== */
.products-section { background: var(--color-bg); }
.product-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 24px; }

.product-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all 0.3s ease;
}
.product-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-xl);
    border-color: var(--color-primary);
}

.product-card .card-img { 
    background: var(--color-bg);
    padding: 24px;
}
.product-card .card-img img { 
    border-radius: var(--radius-md);
    aspect-ratio: 1;
    object-fit: contain;
    mix-blend-mode: multiply;
}

.product-card .card-body { padding: 24px; }
.product-card .card-body h3 { font-size: 1.1rem; margin-bottom: 8px; }
.product-card .card-body h3 a { color: var(--color-accent); }
.product-card .card-body h3 a:hover { color: var(--color-primary); }
.product-card .card-body p { font-size: 0.9rem; color: var(--color-text-muted); margin-bottom: 16px; line-height: 1.5; }

.feature-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 16px; }
.feature-tag { background: var(--color-primary-light); color: var(--color-primary); padding: 4px 10px; font-size: 0.75rem; border-radius: 6px; font-weight: 500; }

/* ========== 10. Video Section ========== */
.video-section { background: var(--color-surface); }
.video-wrapper {
    max-width: 960px;
    margin: 0 auto;
    aspect-ratio: 16/9;
    background: var(--color-accent);
    border-radius: var(--radius-lg);
    overflow: hidden;
    position: relative;
    cursor: pointer;
    box-shadow: var(--shadow-xl);
}
.video-wrapper img { width: 100%; height: 100%; object-fit: cover; opacity: 0.8; transition: opacity 0.3s; }
.video-wrapper:hover img { opacity: 0.6; }
.play-btn-overlay { position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); color: white; font-size: 80px; opacity: 0.9; transition: transform 0.3s; filter: drop-shadow(0 4px 12px rgba(0,0,0,0.3)); }
.video-wrapper:hover .play-btn-overlay { transform: translate(-50%, -50%) scale(1.1); }

/* ========== 11. Footer ========== */
.footer {
    background: #111827;
    color: #FFFFFF;
    padding: 80px 0 40px;
}
.footer-grid { display: grid; grid-template-columns: 1.2fr 1fr; gap: 60px; margin-bottom: 40px; }

/* Clean Form Wrapper - High Contrast */
.lead-form-wrapper {
    background: #FFFFFF;
    padding: 36px;
    border-radius: var(--radius-lg);
    color: #111827;
}
.lead-form-wrapper h3 { color: #111827; margin-bottom: 8px; font-size: 1.3rem; }
.lead-form-wrapper > p { color: #6B7280; margin-bottom: 24px; }

.lead-form input, .lead-form textarea {
    width: 100%;
    padding: 14px 16px;
    margin-bottom: 16px;
    background: #FFFFFF;
    border: 1px solid #D1D5DB;
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 0.95rem;
    color: #000000;
}
.lead-form input::placeholder, .lead-form textarea::placeholder { color: #9CA3AF; }
.lead-form input:focus, .lead-form textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.2);
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

.company-info h3 { font-size: 1.5rem; color: #FFFFFF; margin-bottom: 20px; }
.company-info p { margin-bottom: 12px; color: #F0F0F0; font-size: 0.95rem; }
.copyright { margin-top: 40px; padding-top: 24px; border-top: 1px solid rgba(255,255,255,0.2); font-size: 0.85rem; color: #F0F0F0; }
.copyright a { color: #FFFFFF; text-decoration: underline; }
.copyright a:hover { color: var(--color-primary); }

/* ========== 12. Page Header (Sub-pages) ========== */
.page-header {
    background: linear-gradient(180deg, var(--color-bg) 0%, var(--color-primary-light) 100%);
    padding: 80px 0 60px;
    text-align: center;
    margin-top: 72px;
}
.page-header h1 { margin-bottom: 12px; }
.page-header p { color: var(--color-text-muted); font-size: 1.15rem; }

/* ========== 13. Sidebar (Products) ========== */
.products-layout { display: flex; gap: 48px; padding: 80px 0; }
.sidebar { width: 260px; flex-shrink: 0; }
.sidebar-title { font-size: 0.8rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.05em; color: var(--color-text-muted); margin-bottom: 16px; display: block; }
.sidebar-nav a { display: block; padding: 12px 16px; border-radius: var(--radius-sm); margin-bottom: 4px; color: var(--color-text); font-weight: 500; transition: all 0.2s; }
.sidebar-nav a:hover { background: var(--color-surface); color: var(--color-primary); }
.sidebar-nav a.active { background: var(--color-primary-light); color: var(--color-primary); font-weight: 600; }
.products-content { flex-grow: 1; }

/* ========== 14. Specs Table - Minimal ========== */
.specs-table { width: 100%; margin: 32px 0; border-collapse: collapse; }
.specs-table th, .specs-table td { padding: 14px 0; text-align: left; border-bottom: 1px solid var(--color-border); }
.specs-table th { font-size: 0.75rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.05em; color: var(--color-text-muted); background: transparent; }
.specs-table td { color: var(--color-text); font-weight: 500; }
.specs-table tr:last-child th, .specs-table tr:last-child td { border-bottom: none; }

/* ========== 15. Product Detail ========== */
.breadcrumb { padding: 20px 0; font-size: 0.9rem; color: var(--color-text-muted); }
.breadcrumb a { color: var(--color-primary); }
.breadcrumb a:hover { text-decoration: underline; }
.breadcrumb span { margin: 0 10px; color: var(--color-border); }

.product-detail { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; padding: 48px 0; }
.product-gallery { display: flex; gap: 16px; }
.gallery-thumbs { display: flex; flex-direction: column; gap: 12px; width: 80px; }
.gallery-thumbs img { width: 100%; border-radius: var(--radius-sm); border: 2px solid transparent; cursor: pointer; opacity: 0.6; transition: all 0.2s; }
.gallery-thumbs img:hover, .gallery-thumbs img.active { border-color: var(--color-primary); opacity: 1; }
.gallery-main { flex: 1; border-radius: var(--radius-lg); overflow: hidden; border: 1px solid var(--color-border); background: var(--color-bg); }
.gallery-main img { width: 100%; transition: transform 0.4s ease; cursor: zoom-in; }
.gallery-main:hover img { transform: scale(1.08); }

.product-info h1 { font-size: 2rem; margin-bottom: 16px; }
.product-info .price { font-size: 1.2rem; color: var(--color-primary); font-weight: 600; margin-bottom: 24px; }
.product-info .description { color: var(--color-text-muted); margin-bottom: 28px; line-height: 1.7; }

/* ========== 16. About Page ========== */
.about-intro { display: flex; align-items: center; gap: 60px; margin-bottom: 80px; }
.about-text { flex: 1; }
.about-text h2 { margin-bottom: 20px; }
.about-text p { margin-bottom: 16px; color: var(--color-text-muted); }
.about-img { flex: 1; }
.about-img img { border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); }

.milestones { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; text-align: center; background: var(--color-surface); padding: 48px; border-radius: var(--radius-lg); margin-bottom: 80px; border: 1px solid var(--color-border); }
.milestone-number { font-size: 3rem; font-weight: 800; color: var(--color-primary); display: block; margin-bottom: 8px; font-family: var(--font-display); }

/* ========== 17. Contact Page ========== */
.contact-layout { display: grid; grid-template-columns: 1fr 1.2fr; gap: 60px; }
.contact-details h3 { font-size: 1.4rem; margin-bottom: 28px; color: var(--color-accent); }
.contact-item { display: flex; gap: 16px; margin-bottom: 28px; }
.contact-item ion-icon { font-size: 1.5rem; color: var(--color-primary); margin-top: 2px; }
.contact-item strong { display: block; color: var(--color-accent); margin-bottom: 4px; }
.contact-item p { color: var(--color-text-muted); }
.contact-map { height: 280px; background: var(--color-bg); border-radius: var(--radius-lg); margin-top: 32px; display: flex; align-items: center; justify-content: center; color: var(--color-text-muted); border: 1px solid var(--color-border); }

/* ========== 18. Smart Sidebar & Toast ========== */
.smart-sidebar { position: fixed; right: 0; top: 50%; transform: translateY(-50%); z-index: 999; display: flex; flex-direction: column; }
.smart-sidebar button { position: relative; background: var(--color-surface); width: 52px; height: 52px; border: 1px solid var(--color-border); border-right: none; display: flex; align-items: center; justify-content: center; font-size: 1.3rem; margin-bottom: 1px; color: var(--color-text-muted); border-radius: var(--radius-sm) 0 0 var(--radius-sm); cursor: pointer; transition: all 0.2s; }
.smart-sidebar button:hover { background: var(--color-primary); color: white; border-color: var(--color-primary); }

/* Sidebar Tooltips */
.smart-sidebar button::before {
    content: attr(data-tooltip);
    position: absolute;
    right: calc(100% + 10px);
    top: 50%;
    transform: translateY(-50%);
    background: rgba(15, 23, 42, 0.95);
    color: #F8FAFC;
    padding: 8px 14px;
    border-radius: 6px;
    font-size: 0.85rem;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s, visibility 0.2s;
    pointer-events: none;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}
.smart-sidebar button::after {
    content: '';
    position: absolute;
    right: calc(100% + 4px);
    top: 50%;
    transform: translateY(-50%);
    border: 6px solid transparent;
    border-left-color: rgba(15, 23, 42, 0.95);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s, visibility 0.2s;
}
.smart-sidebar button:hover::before,
.smart-sidebar button:hover::after { opacity: 1; visibility: visible; }

.toast { position: fixed; bottom: 32px; left: 50%; transform: translateX(-50%) translateY(100px); background: var(--color-accent); color: white; padding: 14px 28px; border-radius: var(--radius-md); font-size: 0.9rem; font-weight: 500; z-index: 9999; opacity: 0; transition: all 0.3s ease; box-shadow: var(--shadow-xl); }
.toast.show { transform: translateX(-50%) translateY(0); opacity: 1; }
.toast.success { background: linear-gradient(135deg, #10B981 0%, #059669 100%); }
.toast.info { background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%); }

.live-chat-btn { position: fixed; right: 24px; bottom: 24px; width: 60px; height: 60px; background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%); color: white; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 26px; box-shadow: var(--shadow-lg), var(--shadow-glow); z-index: 1000; cursor: pointer; transition: all 0.3s; border: none; }
.live-chat-btn:hover { transform: scale(1.08); }

/* ========== 19. Responsive ========== */
@media (max-width: 1024px) {
    .products-layout { flex-direction: column; }
    .sidebar { width: 100%; }
    .sidebar-nav { display: flex; flex-wrap: wrap; gap: 8px; }
    .sidebar-nav a { padding: 8px 16px; }
}

@media (max-width: 768px) {
    .nav, .header-actions { display: none; }
    .mobile-menu-btn { display: block; }
    
    .mobile-menu { position: fixed; top: 72px; left: 0; width: 100%; background: var(--color-surface); border-top: 1px solid var(--color-border); box-shadow: var(--shadow-lg); padding: 24px; display: flex; flex-direction: column; gap: 12px; transform: translateY(-150%); transition: transform 0.3s ease; z-index: 900; }
    .mobile-menu.active { transform: translateY(0); }
    .mobile-menu a { font-size: 1rem; font-weight: 600; padding: 12px 0; border-bottom: 1px solid var(--color-border); color: var(--color-accent); }
    
    .hero { min-height: auto; padding: 120px 0 80px; }
    .hero-content { padding: 32px; }
    .hero-btns { flex-direction: column; }
    
    .trust-grid { gap: 24px; }
    .footer-grid { grid-template-columns: 1fr; gap: 48px; }
    .form-row { grid-template-columns: 1fr; }
    
    .product-detail { grid-template-columns: 1fr; }
    .product-gallery { flex-direction: column-reverse; }
    .gallery-thumbs { flex-direction: row; width: 100%; }
    .gallery-thumbs img { width: 64px; }
    
    .about-intro { flex-direction: column; }
    .milestones { grid-template-columns: 1fr 1fr; }
    .contact-layout { grid-template-columns: 1fr; }
    
    .page-header { padding: 60px 0 40px; }
}

/* ========== 20. Loading States ========== */
.loading-text { text-align: center; color: var(--color-text-muted); padding: 60px; font-size: 1rem; }

/* ========== 21. Polymorphic Product Views ========== */

/* Category Section */
.category-section {
    margin-bottom: 60px;
    padding-bottom: 60px;
    border-bottom: 1px solid var(--color-border);
}
.category-section:last-child { border-bottom: none; }
.category-header { margin-bottom: 32px; }
.category-header h2 { font-size: 1.75rem; margin-bottom: 8px; }
.category-header p { color: var(--color-text-muted); }

/* Table View - Spec-Dense Products */
.table-view-layout {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 40px;
    align-items: start;
}
.table-view-image {
    background: var(--color-bg);
    border-radius: var(--radius-lg);
    padding: 24px;
    border: 1px solid var(--color-border);
    position: sticky;
    top: 100px;
}
.table-view-image img { width: 100%; border-radius: var(--radius-md); }
.common-specs { margin-top: 20px; }
.common-specs h4 { font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--color-text-muted); margin-bottom: 12px; }
.common-specs ul { list-style: none; }
.common-specs li { padding: 8px 0; border-bottom: 1px solid var(--color-border); font-size: 0.9rem; display: flex; justify-content: space-between; }
.common-specs li:last-child { border-bottom: none; }
.common-specs .spec-label { color: var(--color-text-muted); }
.common-specs .spec-value { font-weight: 600; color: var(--color-accent); }

/* Variants Table */
.variants-table-wrapper { overflow-x: auto; }
.variants-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--color-surface);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}
.variants-table thead { background: var(--color-bg); }
.variants-table th {
    padding: 14px 16px;
    text-align: left;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-muted);
    border-bottom: 2px solid var(--color-border);
}
.variants-table td {
    padding: 14px 16px;
    border-bottom: 1px solid var(--color-border);
    font-size: 0.95rem;
}
.variants-table tbody tr:hover { background: var(--color-primary-light); }
.variants-table .model-cell { font-weight: 600; color: var(--color-accent); }
.variants-table .btn-inquire { padding: 6px 14px; font-size: 0.8rem; }

/* Card View - Visual Products */
.card-view-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

/* Banner View - Service CTA */
.banner-view {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: var(--color-accent);
    color: white;
    min-height: 320px;
    display: flex;
    align-items: center;
}
.banner-view-bg {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    object-fit: cover;
    opacity: 0.3;
}
.banner-view-content {
    position: relative;
    z-index: 1;
    padding: 48px 60px;
    max-width: 600px;
}
.banner-view-content h2 { font-size: 2rem; color: white; margin-bottom: 16px; }
.banner-view-content p { font-size: 1.1rem; margin-bottom: 24px; opacity: 0.9; }
.banner-features { display: flex; flex-wrap: wrap; gap: 16px; margin-bottom: 28px; }
.banner-features span {
    background: rgba(255,255,255,0.15);
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 0.9rem;
}
.banner-view .btn-primary {
    background: #FFFFFF;
    color: var(--color-accent);
    border-color: #FFFFFF;
}
.banner-view .btn-primary:hover {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

/* Responsive for polymorphic views */
@media (max-width: 768px) {
    .table-view-layout { grid-template-columns: 1fr; }
    .table-view-image { position: static; }
    .banner-view-content { padding: 32px 24px; }
    .banner-view-content h2 { font-size: 1.5rem; }
}

/* ========== 22. Homepage Category Grid ========== */
.category-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.category-grid .category-card:nth-child(4),
.category-grid .category-card:nth-child(5) {
    grid-column: span 1;
}

.category-card {
    display: block;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all 0.3s ease;
    text-align: center;
}
.category-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-xl);
    border-color: var(--color-primary);
}
.category-img { background: var(--color-bg); }
.category-img img { width: 100%; aspect-ratio: 4/3; object-fit: cover; }
.category-card h3 {
    padding: 20px 16px;
    font-size: 1.1rem;
    color: var(--color-accent);
    margin: 0;
}
.category-card:hover h3 { color: var(--color-primary); }
.category-custom .category-img { background: #111827; }

@media (max-width: 768px) {
    .category-grid { grid-template-columns: repeat(2, 1fr); }
    .category-grid .category-card:last-child { grid-column: span 2; }
}

/* ========== 23. Hot Sale Section ========== */
.hot-sale-section { background: var(--color-surface); }
.hot-sale-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 20px;
}
.hot-sale-grid .product-card { margin-bottom: 0; }
.hot-sale-grid .product-card .card-img { padding: 16px; }
.hot-sale-grid .product-card .card-body { padding: 16px; }
.hot-sale-grid .product-card .card-body h3 { font-size: 0.95rem; }
.hot-sale-grid .product-card .card-body p { font-size: 0.85rem; margin-bottom: 12px; }

@media (max-width: 1200px) { .hot-sale-grid { grid-template-columns: repeat(4, 1fr); } }
@media (max-width: 992px) { .hot-sale-grid { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 768px) { .hot-sale-grid { grid-template-columns: repeat(2, 1fr); } }

/* ========== 24. Tab Navigation System (Apple-Style) ========== */
.category-tabs {
    display: flex;
    justify-content: center;
    gap: 8px;
    padding: 16px 24px;
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.category-tab {
    padding: 12px 24px;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--color-text-muted);
    background: transparent;
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.25s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

.category-tab:hover {
    color: var(--color-primary);
    background: var(--color-primary-light);
}

.category-tab.active {
    color: #FFFFFF;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    border-color: var(--color-primary);
    box-shadow: var(--shadow-md), var(--shadow-glow);
}

.category-tab ion-icon {
    font-size: 1.2rem;
}

/* Tab Content Panels */
.tab-content {
    display: none;
    animation: fadeInUp 0.4s ease;
}

.tab-content.active {
    display: block;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(16px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ========== 25. Spec Matrix - Split Layout (Configurator Style) ========== */
.spec-matrix-layout {
    display: grid;
    grid-template-columns: 380px 1fr;
    gap: 48px;
    align-items: start;
}

/* 左侧 - 产品展示面板 */
.product-preview-panel {
    position: sticky;
    top: 100px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.preview-image-container {
    background: linear-gradient(180deg, var(--color-bg) 0%, #EEF2FF 100%);
    padding: 32px;
    text-align: center;
    min-height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.preview-image-container img {
    max-width: 100%;
    max-height: 240px;
    object-fit: contain;
    border-radius: var(--radius-md);
    transition: transform 0.3s ease;
}

.preview-image-container:hover img {
    transform: scale(1.05);
}

.preview-info {
    padding: 24px;
    border-top: 1px solid var(--color-border);
}

.preview-model {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-accent);
    margin-bottom: 8px;
}

.preview-size {
    font-size: 1.1rem;
    color: var(--color-primary);
    font-weight: 600;
    margin-bottom: 16px;
}

.preview-specs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 20px;
}

.preview-spec-item {
    background: var(--color-bg);
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
}

.preview-spec-item .label {
    color: var(--color-text-muted);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    display: block;
    margin-bottom: 4px;
}

.preview-spec-item .value {
    color: var(--color-accent);
    font-weight: 600;
}

/* 右侧 - 尺寸选择矩阵 */
.size-selector-panel {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 32px;
    box-shadow: var(--shadow-md);
}

.selector-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--color-border);
}

.selector-header h3 {
    font-size: 1.1rem;
    color: var(--color-accent);
    display: flex;
    align-items: center;
    gap: 8px;
}

.selector-header .count-badge {
    background: var(--color-primary-light);
    color: var(--color-primary);
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
}

/* 工业仪表盘风格的尺寸按钮矩阵 */
.size-matrix {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 12px;
}

.size-chip {
    position: relative;
    padding: 14px 16px;
    font-size: 0.85rem;
    font-weight: 600;
    font-family: 'SF Mono', 'Consolas', monospace;
    color: var(--color-text);
    background: var(--color-bg);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.2s ease;
    text-align: center;
    letter-spacing: -0.02em;
}

.size-chip::before {
    content: '';
    position: absolute;
    top: 4px;
    left: 4px;
    width: 6px;
    height: 6px;
    background: var(--color-border);
    border-radius: 50%;
    transition: all 0.2s;
}

.size-chip:hover {
    border-color: var(--color-primary);
    background: var(--color-primary-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.size-chip:hover::before {
    background: var(--color-primary);
}

.size-chip.selected {
    color: #FFFFFF;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    border-color: var(--color-primary);
    box-shadow: var(--shadow-md), var(--shadow-glow);
}

.size-chip.selected::before {
    background: rgba(255, 255, 255, 0.8);
    box-shadow: 0 0 8px rgba(255, 255, 255, 0.6);
}

.size-chip .chip-model {
    display: block;
    font-size: 0.7rem;
    opacity: 0.7;
    margin-top: 4px;
    font-weight: 500;
}

/* ========== 26. Smart Filter Toolbar ========== */
.filter-toolbar {
    display: flex;
    gap: 16px;
    align-items: center;
    padding: 20px 24px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    margin-bottom: 24px;
    flex-wrap: wrap;
}

.filter-toolbar .search-box {
    flex: 1;
    min-width: 200px;
    position: relative;
}

.filter-toolbar .search-box input {
    width: 100%;
    padding: 12px 16px 12px 44px;
    font-size: 0.95rem;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: var(--color-bg);
    transition: all 0.2s;
}

.filter-toolbar .search-box input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.filter-toolbar .search-box ion-icon {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 1.2rem;
    color: var(--color-text-muted);
}

.filter-toolbar select {
    padding: 12px 40px 12px 16px;
    font-size: 0.95rem;
    font-weight: 500;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: var(--color-bg) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2364748B' d='M2 4l4 4 4-4'/%3E%3C/svg%3E") no-repeat right 14px center;
    appearance: none;
    cursor: pointer;
    transition: all 0.2s;
    min-width: 180px;
}

.filter-toolbar select:focus {
    outline: none;
    border-color: var(--color-primary);
}

.filter-toolbar .result-count {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    font-weight: 500;
    white-space: nowrap;
}

/* 隐藏被筛选掉的卡片 */
.product-card.hidden {
    display: none !important;
}

/* ========== 27. Grid Box Cards Enhanced ========== */
.grid-card .card-img {
    position: relative;
}

.grid-badge {
    position: absolute;
    top: 12px;
    right: 12px;
    background: linear-gradient(135deg, var(--color-accent) 0%, #1E293B 100%);
    color: #FFFFFF;
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.02em;
}

.hot-badge {
    position: absolute;
    top: 12px;
    left: 12px;
    background: linear-gradient(135deg, #EF4444 0%, #DC2626 100%);
    color: #FFFFFF;
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 700;
}

/* ========== 28. Responsive for New Components ========== */
@media (max-width: 1024px) {
    .spec-matrix-layout {
        grid-template-columns: 1fr;
    }

    .product-preview-panel {
        position: static;
    }

    .size-matrix {
        grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    }
}

@media (max-width: 768px) {
    .category-tabs {
        gap: 6px;
        padding: 12px 16px;
    }

    .category-tab {
        padding: 10px 16px;
        font-size: 0.85rem;
    }

    .category-tab span {
        display: none;
    }

    .filter-toolbar {
        flex-direction: column;
        align-items: stretch;
    }

    .filter-toolbar .search-box {
        min-width: 100%;
    }

    .filter-toolbar select {
        width: 100%;
    }

    .size-chip {
        padding: 10px 12px;
        font-size: 0.8rem;
    }
}

/* ========== 29. Common Specs Panel (Floating) ========== */
.common-specs-bar {
    display: flex;
    justify-content: center;
    gap: 32px;
    padding: 16px 24px;
    background: var(--color-accent);
    color: #FFFFFF;
    border-radius: var(--radius-md);
    margin-bottom: 24px;
}

.common-specs-bar .spec-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
}

.common-specs-bar .spec-item .label {
    opacity: 0.7;
}

.common-specs-bar .spec-item .value {
    font-weight: 600;
}

/* ========== 30. Empty State ========== */
.empty-state {
    text-align: center;
    padding: 60px 24px;
    color: var(--color-text-muted);
}

.empty-state ion-icon {
    font-size: 48px;
    margin-bottom: 16px;
    opacity: 0.5;
}

.empty-state p {
    font-size: 1rem;
}

/* ========== 31. Size Chip In-Cart State (已购状态) ========== */
.size-chip.in-cart {
    border: 2px solid #059669 !important;
    background: linear-gradient(135deg, #D1FAE5 0%, #ECFDF5 100%);
    position: relative;
}

.size-chip.in-cart::after {
    content: '✓';
    position: absolute;
    top: -6px;
    right: -6px;
    width: 18px;
    height: 18px;
    background: #059669;
    color: white;
    border-radius: 50%;
    font-size: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
}

/* 选中且已购：蓝色背景 + 保留绿色勾 */
.size-chip.selected.in-cart {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: white;
    border-color: var(--color-primary) !important;
}

.size-chip.selected.in-cart::after {
    background: #10B981;
    border: 2px solid white;
}

/* ========== 32. Price Badge (价格标签) ========== */
.price-badge {
    position: absolute;
    top: 12px;
    right: 12px;
    background: linear-gradient(135deg, #EF4444 0%, #DC2626 100%);
    color: white;
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    box-shadow: 0 2px 8px rgba(239, 68, 68, 0.4);
    z-index: 10;
    animation: pulseBadge 2s infinite;
}

@keyframes pulseBadge {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

/* ========== 33. Product Modal (产品弹窗) ========== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.product-modal {
    background: white;
    border-radius: var(--radius-xl);
    max-width: 600px;
    width: 90%;
    max-height: 85vh;
    overflow-y: auto;
    box-shadow: var(--shadow-xl);
    transform: translateY(20px) scale(0.95);
    transition: transform 0.3s ease;
}

.modal-overlay.active .product-modal {
    transform: translateY(0) scale(1);
}

.modal-header {
    position: relative;
    padding: 0;
}

.modal-header img {
    width: 100%;
    height: 280px;
    object-fit: cover;
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
}

.modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    width: 36px;
    height: 36px;
    background: rgba(255,255,255,0.9);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    color: #333;
    transition: all 0.2s;
}

.modal-close:hover {
    background: white;
    transform: scale(1.1);
}

.modal-body {
    padding: 24px;
}

.modal-body h2 {
    font-size: 1.5rem;
    margin-bottom: 8px;
}

.modal-body .modal-specs {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    margin: 20px 0;
    padding: 16px;
    background: var(--color-primary-light);
    border-radius: var(--radius-md);
}

.modal-specs .spec-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.modal-specs .spec-label {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.modal-specs .spec-value {
    font-weight: 600;
    color: var(--color-accent);
}

.modal-body .modal-description {
    color: var(--color-text);
    margin-bottom: 20px;
    line-height: 1.7;
}

.modal-footer {
    display: flex;
    gap: 12px;
    padding: 0 24px 24px;
}

.modal-footer .btn {
    flex: 1;
}

/* ========== 34. Navigation Highlight (导航高亮) ========== */
.nav a.nav-highlight {
    font-weight: 700;
    color: var(--color-primary);
    position: relative;
}

.nav a.nav-highlight::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-primary), #8B5CF6);
    border-radius: 2px;
}

/* ========== 35. Custom Service Banner (定制服务全宽 Banner) ========== */
.custom-hero-banner {
    background: linear-gradient(135deg, #1E293B 0%, #0F172A 50%, #1E3A8A 100%);
    color: white;
    padding: 60px 24px;
    border-radius: var(--radius-xl);
    margin-bottom: 40px;
    position: relative;
    overflow: hidden;
}

.custom-hero-banner::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 60%;
    height: 200%;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.15) 0%, transparent 70%);
    pointer-events: none;
}

.custom-hero-banner .banner-content {
    position: relative;
    z-index: 1;
    max-width: 700px;
}

.custom-hero-banner h2 {
    color: white;
    font-size: clamp(1.8rem, 4vw, 2.5rem);
    margin-bottom: 16px;
}

.custom-hero-banner .tagline {
    font-size: 1.2rem;
    opacity: 0.9;
    margin-bottom: 24px;
}

.custom-hero-banner .features-row {
    display: flex;
    gap: 24px;
    flex-wrap: wrap;
    margin-bottom: 24px;
}

.custom-hero-banner .feature-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.95rem;
    opacity: 0.85;
}

.custom-hero-banner .feature-item ion-icon {
    color: #34D399;
    font-size: 1.2rem;
}

.custom-hero-banner .btn-cta {
    background: linear-gradient(135deg, #3B82F6 0%, #8B5CF6 100%);
    color: white;
    padding: 14px 32px;
    border-radius: 30px;
    font-weight: 600;
    font-size: 1rem;
    border: none;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: all 0.3s ease;
}

.custom-hero-banner .btn-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(59, 130, 246, 0.4);
}

/* ========== 36. Hot Sale Card Enhancement ========== */
.hot-sale-grid .product-card {
    position: relative;
    cursor: pointer;
    transition: all 0.3s ease;
}

.hot-sale-grid .product-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

/* ========== 37. Category Grid (NUCLEAR REWRITE) ========== */
/* 强制定义网格容器 */
.category-grid {
    display: grid !important;
    /* 桌面端：2列，左宽右窄 */
    grid-template-columns: 1.5fr 1fr !important;
    /* 桌面端：3行，每行必须锁死 220px */
    grid-template-rows: 220px 220px 220px !important;
    gap: 16px !important;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    /* 定义区域名字 */
    grid-template-areas:
        "area-custom  area-rect"
        "area-custom  area-square"
        "area-circle  area-grid" !important;
}

/* 强制卡片样式 - 锁死尺寸 */
.category-card {
    width: 100% !important;
    height: 100% !important;
    overflow: hidden !important; /* 斩断所有溢出内容 */
    position: relative;
    border-radius: 12px;
    display: block;
    text-decoration: none;
    background: #111;
}

/* 强制图片样式 - 绝对填充 */
.category-card img {
    position: absolute !important;
    top: 0;
    left: 0;
    width: 100% !important;
    height: 100% !important;
    object-fit: cover !important; /* 保证铺满不变形 */
    transition: transform 0.3s ease;
    z-index: 1;
}

/* Hover: 只放大图片，不动卡片 */
.category-card:hover img {
    transform: scale(1.05);
}

/* 文字覆盖层 */
.category-card .card-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.85) 0%, rgba(0,0,0,0.2) 50%, transparent 100%);
    display: flex;
    align-items: flex-end;
    padding: 20px;
    pointer-events: none;
    z-index: 2;
}

.category-card h3 {
    color: white;
    font-size: 1.2rem;
    font-weight: 700;
    margin: 0;
    text-shadow: 0 2px 4px rgba(0,0,0,0.5);
}

/* 指定每个卡片去哪个坑位 - 关键步骤 */
.card-custom { grid-area: area-custom; }
.card-rect   { grid-area: area-rect; }
.card-square { grid-area: area-square; }
.card-circle { grid-area: area-circle; }
.card-grid   { grid-area: area-grid; }

/* Hero 文字放大 */
.card-custom h3 {
    font-size: 2rem;
}

/* 响应式：移动端堆叠 */
@media (max-width: 768px) {
    .category-grid {
        grid-template-columns: 1fr !important;
        grid-template-rows: repeat(5, 200px) !important;
        grid-template-areas:
            "area-custom"
            "area-rect"
            "area-square"
            "area-circle"
            "area-grid" !important;
    }
}

/* ========== 38. Premium Badge (Minimalist) ========== */
.badge-premium {
    position: absolute;
    top: 16px;
    left: 16px;
    background: var(--color-accent-gold);
    color: var(--color-bg-dark);
    font-size: 10px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    padding: 6px 12px;
    border-radius: 4px;
    z-index: 10;
    box-shadow: 0 2px 8px rgba(212, 175, 55, 0.3);
    line-height: 1;
}

/* ========== 39. Hero Industrial - 震撼视觉 ========== */
.hero-industrial {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg-dark);
    overflow: hidden;
    padding-top: 72px;
}

.hero-industrial::before {
    content: '';
    position: absolute;
    inset: 0;
    background: 
        linear-gradient(135deg, rgba(10, 10, 10, 0.95) 0%, rgba(26, 26, 46, 0.9) 50%, rgba(22, 33, 62, 0.85) 100%),
        url('https://images.unsplash.com/photo-1565193566173-7a0ee3dbe261?w=1920&q=80');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
}

/* 工业网格纹理叠加 */
.hero-industrial::after {
    content: '';
    position: absolute;
    inset: 0;
    background-image: 
        linear-gradient(rgba(212, 175, 55, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(212, 175, 55, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    pointer-events: none;
}

.hero-industrial .container {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 900px;
}

.hero-industrial h1 {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 700;
    letter-spacing: 0.02em;
    text-transform: uppercase;
    color: #ffffff;
    margin-bottom: 24px;
    line-height: 1.2;
    text-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
}

.hero-industrial .tagline {
    font-family: var(--font-sans);
    font-size: 1.15rem;
    font-weight: 500;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-accent-gold);
    margin-bottom: 48px;
    opacity: 0.95;
}

.hero-industrial .hero-cta {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn-gold {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 18px 40px;
    font-size: 0.9rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    background: linear-gradient(135deg, var(--color-accent-gold) 0%, #c9a227 100%);
    color: var(--color-bg-dark);
    border: none;
    border-radius: 0;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 20px rgba(212, 175, 55, 0.4);
}

.btn-gold:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(212, 175, 55, 0.5);
}

.btn-outline-light {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 18px 40px;
    font-size: 0.9rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    background: transparent;
    color: #ffffff;
    border: 2px solid rgba(255, 255, 255, 0.4);
    border-radius: 0;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-outline-light:hover {
    border-color: var(--color-accent-gold);
    color: var(--color-accent-gold);
    transform: translateY(-3px);
}

/* ========== 40. Trust Bar Industrial ========== */
.trust-bar-industrial {
    background: var(--color-bg-industrial);
    border-top: 1px solid var(--color-border-dark);
    border-bottom: 1px solid var(--color-border-dark);
    padding: 40px 0;
}

.trust-bar-industrial .container {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 20px;
    border-right: 1px solid var(--color-border-dark);
}

.stat-item:last-child {
    border-right: none;
}

.stat-item ion-icon {
    font-size: 2.5rem;
    color: var(--color-accent-gold);
    margin-bottom: 12px;
}

.stat-item .stat-number {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 400;
    letter-spacing: 0.05em;
    color: #ffffff;
    margin-bottom: 4px;
}

.stat-item .stat-label {
    font-size: 0.85rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-text-muted);
}

@media (max-width: 768px) {
    .trust-bar-industrial .container {
        grid-template-columns: repeat(2, 1fr);
    }
    .stat-item {
        border-right: none;
        border-bottom: 1px solid var(--color-border-dark);
    }
    .stat-item:nth-child(3), .stat-item:nth-child(4) {
        border-bottom: none;
    }
}

/* ========== 41. Category Grid Industrial ========== */
.category-grid-industrial {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    grid-template-rows: 280px 280px;
    gap: 16px;
    grid-template-areas:
        "custom rect square"
        "custom circle grid";
}

.category-card-industrial {
    position: relative;
    display: flex;
    align-items: flex-end;
    padding: 28px;
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
}

.category-card-industrial::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 40%, rgba(0,0,0,0.8) 100%);
    z-index: 1;
    opacity: 0.7;
    transition: opacity 0.4s;
}

.category-card-industrial:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-industrial);
    border-color: var(--color-accent-gold);
}

.category-card-industrial:hover::before {
    opacity: 0.9;
}

.category-card-industrial img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
}

.category-card-industrial:hover img {
    transform: scale(1.08);
}

.category-card-industrial .card-content {
    position: relative;
    z-index: 2;
}

.category-card-industrial h3 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 400;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: #ffffff;
    margin: 0;
}

/* Custom Mold 特殊样式 - 核心产品 */
.card-custom-industrial {
    grid-area: custom;
    background: linear-gradient(135deg, var(--color-accent-navy) 0%, var(--color-bg-dark) 100%);
}

.card-custom-industrial::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--color-accent-gold), transparent);
}

.card-custom-industrial h3 {
    font-size: 2rem;
}

.card-custom-industrial .subtitle {
    font-size: 0.85rem;
    color: var(--color-accent-gold);
    letter-spacing: 0.15em;
    text-transform: uppercase;
    margin-top: 8px;
}

.card-rect-industrial { grid-area: rect; }
.card-square-industrial { grid-area: square; }
.card-circle-industrial { grid-area: circle; }
.card-grid-industrial { grid-area: grid; }

@media (max-width: 768px) {
    .category-grid-industrial {
        grid-template-columns: 1fr;
        grid-template-rows: repeat(5, 200px);
        grid-template-areas:
            "custom"
            "rect"
            "square"
            "circle"
            "grid";
    }
}

/* ========== 42. Hot Sale Showcase ========== */
.hot-sale-showcase {
    background: var(--color-bg);
    padding: 100px 0;
}

.hot-sale-showcase .section-header h2 {
    font-family: var(--font-display);
    font-size: 2.5rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.showcase-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 20px;
}

.showcase-card {
    position: relative;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: all 0.3s ease;
    cursor: pointer;
}

.showcase-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-primary);
}

.showcase-card .card-img {
    background: var(--color-bg);
    padding: 20px;
}

.showcase-card .card-img img {
    width: 100%;
    aspect-ratio: 1;
    object-fit: contain;
    transition: transform 0.4s ease;
}

.showcase-card:hover .card-img img {
    transform: scale(1.05);
}

.showcase-card .card-body {
    padding: 20px;
}

.showcase-card .card-body h3 {
    font-size: 0.95rem;
    margin-bottom: 8px;
    color: var(--color-accent);
}

.showcase-card .card-body p {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    margin-bottom: 16px;
}

@media (max-width: 1200px) { .showcase-grid { grid-template-columns: repeat(4, 1fr); } }
@media (max-width: 992px) { .showcase-grid { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 768px) { .showcase-grid { grid-template-columns: repeat(2, 1fr); } }

/* ========== 43. Zig-Zag Layout (Why Choose Us) ========== */
.zigzag-section {
    background: var(--color-bg);
    padding: 100px 0;
}

.zigzag-section .section-header h2 {
    font-family: var(--font-display);
    font-size: 2.5rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.zigzag-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    margin-bottom: 80px;
}

.zigzag-row:last-child {
    margin-bottom: 0;
}

.zigzag-row.reverse {
    direction: rtl;
}

.zigzag-row.reverse > * {
    direction: ltr;
}

.zigzag-image {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
}

.zigzag-image::before {
    content: '';
    position: absolute;
    inset: 0;
    border: 2px solid var(--color-accent-gold);
    border-radius: var(--radius-lg);
    transform: translate(12px, 12px);
    z-index: -1;
}

.zigzag-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.zigzag-image:hover img {
    transform: scale(1.03);
}

.zigzag-text h3 {
    font-family: var(--font-display);
    font-size: 2rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    margin-bottom: 16px;
    color: var(--color-accent);
}

.zigzag-text p {
    font-size: 1.1rem;
    color: var(--color-text-muted);
    line-height: 1.8;
    margin-bottom: 24px;
}

.zigzag-features {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.zigzag-features span {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 18px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-text);
}

.zigzag-features span ion-icon {
    color: var(--color-accent-gold);
}

@media (max-width: 768px) {
    .zigzag-row {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    .zigzag-row.reverse {
        direction: ltr;
    }
}

/* ========== 44. Navigation Highlight ========== */
.nav-highlight {
    color: var(--color-accent-gold) !important;
    font-weight: 600 !important;
}

.nav-highlight:hover {
    color: var(--color-accent-gold) !important;
    opacity: 0.8;
}