/* ============================================================
   鈞翔實業有限公司 — 公司形象網站
   Design System + Complete Styles
   方案 A：Webflow 風格深色主題
   ============================================================ */

/* ---- Google Fonts ---- */
@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800&family=Noto+Sans+TC:wght@300;400;500;700;900&family=Outfit:wght@300;400;500;600;700;800;900&family=Instrument+Serif:italic@0;1&display=swap');

/* ============================================================
   1. CSS Custom Properties (Design Tokens)
   ============================================================ */
:root {
    /* ---- Primary Colors ---- */
    --color-primary:        #1B3A5C;
    --color-primary-light:  #2A5A8C;
    --color-primary-dark:   #0F2440;

    /* ---- Accent Colors (Industrial Gold) ---- */
    --color-accent:         #D4A843;
    --color-accent-light:   #E8C86A;
    --color-accent-dark:    #B08A2E;

    /* ---- Backgrounds (Refined Midnight Blue - Less Black) ---- */
    --color-bg-primary:     #121F33;
    --color-bg-secondary:   #1A2B47;
    --color-bg-card:        rgba(255, 255, 255, 0.05);
    --color-bg-elevated:    #233554;

    /* ---- Text ---- */
    --color-text-primary:   #F8FAFC;
    --color-text-secondary: #CBD5E1;
    --color-text-muted:     #94A3B8;

    /* ---- Borders ---- */
    --color-border:         rgba(255, 255, 255, 0.1);
    --color-border-hover:   rgba(212, 168, 67, 0.5);

    /* ---- Gradients ---- */
    --gradient-hero:        linear-gradient(135deg, #121F33 0%, #1E3A8A 100%);
    --gradient-accent:      linear-gradient(135deg, #FFD700 0%, #D4A843 50%, #B08A2E 100%);
    --gradient-card:        linear-gradient(145deg, rgba(255,255,255,0.05), rgba(255,255,255,0.01));
    --gradient-glass:       linear-gradient(135deg, rgba(255,255,255,0.1), rgba(255,255,255,0.05));

    /* ---- Typography ---- */
    --font-heading:    'Outfit', 'Noto Sans TC', sans-serif;
    --font-body:       'Plus Jakarta Sans', 'Noto Sans TC', sans-serif;
    --font-accent:     'Instrument Serif', serif;
    --font-mono:       'JetBrains Mono', monospace;

    --text-display:    clamp(3rem, 6vw, 5.5rem);
    --text-h1:         clamp(2.25rem, 4vw, 3.75rem);
    --text-h2:         clamp(1.75rem, 3vw, 2.75rem);
    --text-h3:         clamp(1.25rem, 2vw, 1.75rem);
    --text-body:       1rem;
    --text-body-lg:    1.125rem;
    --text-small:      0.875rem;
    --text-caption:    0.75rem;

    --leading-tight:   1.2;
    --leading-normal:  1.6;
    --leading-relaxed: 1.8;

    /* ---- Spacing ---- */
    --space-1:   0.25rem;
    --space-2:   0.5rem;
    --space-3:   0.75rem;
    --space-4:   1rem;
    --space-6:   1.5rem;
    --space-8:   2rem;
    --space-10:  2.5rem;
    --space-12:  3rem;
    --space-16:  4rem;
    --space-20:  5rem;
    --space-24:  6rem;
    --space-32:  8rem;
    --section-padding: clamp(4rem, 10vh, 8rem);
    --container-max:   1280px;

    /* ---- Radius ---- */
    --radius-sm:   0.375rem;
    --radius-md:   0.75rem;
    --radius-lg:   1rem;
    --radius-xl:   1.5rem;
    --radius-full: 9999px;

    /* ---- Shadows ---- */
    --shadow-sm:       0 2px 8px rgba(0,0,0,0.15);
    --shadow-md:       0 4px 16px rgba(0,0,0,0.2);
    --shadow-lg:       0 8px 32px rgba(0,0,0,0.3);
    --shadow-xl:       0 16px 48px rgba(0,0,0,0.4);
    --shadow-glow:     0 0 30px rgba(212, 168, 67, 0.15);
    --shadow-glow-lg:  0 0 60px rgba(212, 168, 67, 0.25);

    /* ---- Transitions ---- */
    --transition-fast:    150ms ease;
    --transition-normal:  300ms ease;
    --transition-slow:    500ms ease;
    --transition-smooth:  600ms cubic-bezier(0.16, 1, 0.3, 1);
    --ease-out-expo:      cubic-bezier(0.16, 1, 0.3, 1);
    --ease-spring:        cubic-bezier(0.34, 1.56, 0.64, 1);

    /* ---- Nav ---- */
    --nav-height: 80px;
    --announcement-height: 40px;
}


/* ============================================================
   2. CSS Reset & Base
   ============================================================ */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    --mouse-x: 50%;
    --mouse-y: 50%;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--nav-height);
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

body {
    font-family: var(--font-body);
    background: var(--color-bg-primary);
    color: var(--color-text-primary);
    line-height: var(--leading-normal);
    overflow-x: hidden;
    font-feature-settings: "palt"; /* Proportional alternate widths for TC */
}

/* Grain Texture Overlay */
body::after {
    content: '';
    position: fixed;
    inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.5'/%3E%3C/svg%3E");
    opacity: 0.04;
    pointer-events: none;
    z-index: 9999;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    color: inherit;
    text-decoration: none;
}

ul, ol {
    list-style: none;
}

button, input, select, textarea {
    font-family: inherit;
    font-size: inherit;
    color: inherit;
    border: none;
    outline: none;
    background: none;
}

button {
    cursor: pointer;
}

/* ============================================================
   3. Utility Classes
   ============================================================ */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-6);
}

.section {
    padding: var(--section-padding) 0;
    position: relative;
}

.section-label {
    font-family: var(--font-accent);
    font-size: 1.1rem;
    font-style: italic;
    text-transform: capitalize;
    letter-spacing: 1px;
    color: var(--color-accent);
    margin-bottom: var(--space-3);
    display: block;
}

.section-title {
    font-family: var(--font-heading);
    font-size: var(--text-h2);
    font-weight: 700;
    line-height: var(--leading-tight);
    margin-bottom: var(--space-4);
    color: var(--color-text-primary);
}

.section-title .accent {
    color: var(--color-accent);
}

.section-subtitle {
    font-size: var(--text-body-lg);
    color: var(--color-text-secondary);
    max-width: 640px;
    line-height: var(--leading-relaxed);
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-16);
}

.section-header .section-subtitle {
    margin: 0 auto;
}

/* Gold Line Decorator */
.section-header::before {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background: var(--gradient-accent);
    margin: 0 auto var(--space-6);
    border-radius: var(--radius-full);
}

/* ============================================================
   Announcement Bar (Marquee)
   ============================================================ */
.announcement-bar {
    position: relative; /* Changed from fixed to scroll away */
    width: 100%;
    height: var(--announcement-height);
    background: #000; /* Deep black for luxury contrast */
    color: var(--color-accent);
    display: flex;
    align-items: center;
    overflow: hidden;
    z-index: 1100; /* Higher than navbar */
    border-bottom: 1px solid rgba(212, 168, 67, 0.15);
    font-size: 0.85rem;
}

.marquee-track {
    display: flex;
    white-space: nowrap;
    width: 100%;
}

.marquee-content {
    display: flex;
    align-items: center;
    animation: marquee 50s linear infinite;

    min-width: 100%; /* Ensure content fills at least one width */
}

@keyframes marquee {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); } /* Shift exactly half since we duplicated content */
}

.marquee-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 0 40px;
    font-weight: 500;
    letter-spacing: 0.5px;
}

.marquee-item i {
    width: 16px;
    height: 16px;
    color: var(--color-accent-light);
}

.marquee-dot {
    opacity: 0.3;
    font-size: 1.2rem;
}

.announcement-bar:hover .marquee-content {
    animation-play-state: paused;
}

/* Responsive adjustment for Mobile */
@media (max-width: 768px) {
    :root {
        --announcement-height: 36px;
    }
    .marquee-item {
        padding: 0 20px;
        font-size: 0.75rem;
    }
}

/* ============================================================
   4. Navigation
   ============================================================ */
.navbar {
    position: sticky;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    background: var(--color-bg-primary);
    box-shadow: var(--shadow-sm);
    border-bottom: 1px solid var(--color-border);
    z-index: 1000;
    transition: all var(--transition-normal);
    display: flex;
    align-items: center;
}

.navbar.scrolled {
    background: var(--color-bg-secondary);
    box-shadow: var(--shadow-md);
}



.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-family: var(--font-heading);
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--color-text-primary);
    transition: transform var(--transition-normal);
    z-index: 1001;
}

.nav-logo:hover {
    transform: scale(1.02);
}

.nav-logo .logo-icon {
    width: 42px;
    height: 42px;
    background: var(--gradient-accent);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 900;
    font-size: 1.1rem;
    color: var(--color-bg-primary);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-8);
}

.nav-link {
    font-size: var(--text-small);
    font-weight: 500;
    color: var(--color-text-secondary);
    transition: color var(--transition-normal);
    position: relative;
    padding: var(--space-2) 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--color-accent);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-smooth);
}

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

.nav-link:hover::after,
.nav-link.active::after {
    transform: scaleX(1);
}

/* Hamburger */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 6px;
    padding: var(--space-2);
    z-index: 1001;
    cursor: pointer;
}

.hamburger span {
    width: 28px;
    height: 2px;
    background: var(--color-text-primary);
    transition: all var(--transition-normal);
    border-radius: 2px;
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 6px);
}
.hamburger.active span:nth-child(2) {
    opacity: 0;
}
.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -6px);
}

/* Mobile Menu */
.mobile-menu {
    position: fixed;
    inset: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(30px);
    z-index: 999;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-8);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-slow);
}

.mobile-menu.active {
    opacity: 1;
    pointer-events: all;
}

.mobile-menu .nav-link {
    font-size: var(--text-h3);
    font-family: var(--font-heading);
}

/* ============================================================
   5. Hero Section
   ============================================================ */
.hero {
    min-height: 70vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    background: var(--gradient-hero);
    margin-top: 0; /* Sticky nav takes up flow space, so no margin needed */
}





.hero-canvas {
    position: absolute;
    inset: 0;
    z-index: 1;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: rgba(27, 58, 92, 0.4);
    z-index: 2;
}

.hero-content {
    position: relative;
    z-index: 3;
    text-align: center;
    padding: var(--space-8);
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.6);
}

.hero-label {
    font-family: var(--font-mono);
    font-size: var(--text-small);
    text-transform: uppercase;
    letter-spacing: 4px;
    color: var(--color-accent);
    margin-bottom: var(--space-6);
    opacity: 0;
    transform: translateY(20px);
}

.hero-title {
    font-family: var(--font-heading);
    font-size: var(--text-display);
    font-weight: 900;
    line-height: 1.1;
    color: #FFFFFF;
    margin-bottom: var(--space-6);
    opacity: 0;
    transform: translateY(30px);
}

.hero-title .accent {
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: var(--text-body-lg);
    color: rgba(255, 255, 255, 0.8);
    max-width: 600px;
    margin: 0 auto var(--space-10);
    line-height: var(--leading-relaxed);
    opacity: 0;
    transform: translateY(20px);
    letter-spacing: 0.5px;
}

/* Mask Animation */
.mask-slide {
    display: inline-block;
    overflow: hidden;
    vertical-align: bottom;
}

.mask-slide-inner {
    display: inline-block;
    transform: translateY(110%);
    transition: transform 1.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.hero.loaded .mask-slide-inner {
    transform: translateY(0);
}

.hero-slide .hero-content {
    background: rgba(10, 15, 28, 0.4);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-xl);
    padding: var(--space-12);
    box-shadow: var(--shadow-xl);
}

.hero-cta {
    display: flex;
    gap: var(--space-4);
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: var(--space-16);
    opacity: 0;
    transform: translateY(20px);
}

.hero-stats {
    display: flex;
    gap: var(--space-8);
    justify-content: center;
    flex-wrap: wrap;
    opacity: 0;
    transform: translateY(30px);
}

.hero-stat {
    text-align: center;
    padding: var(--space-6);
    background: rgba(255, 255, 255, 0.6);
    backdrop-filter: blur(10px);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    min-width: 150px;
    transition: all var(--transition-normal);
}

.hero-stat:hover {
    border-color: var(--color-border-hover);
    box-shadow: var(--shadow-glow);
    transform: translateY(-4px);
}

.hero-stat .stat-number {
    font-family: var(--font-heading);
    font-size: var(--text-h2);
    font-weight: 800;
    color: var(--color-accent);
    display: block;
}

.hero-stat .stat-label {
    font-size: var(--text-small);
    color: var(--color-text-muted);
    margin-top: var(--space-1);
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: var(--space-10);
    left: 50%;
    transform: translateX(-50%);
    z-index: 3;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-2);
    opacity: 0;
    animation: fadeInUp 0.6s var(--ease-out-expo) 2.8s forwards;
}

.scroll-indicator .mouse {
    width: 26px;
    height: 40px;
    border: 2px solid var(--color-text-muted);
    border-radius: 13px;
    position: relative;
}

.scroll-indicator .mouse::after {
    content: '';
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 3px;
    height: 8px;
    background: var(--color-accent);
    border-radius: var(--radius-full);
    animation: scrollWheel 2s infinite;
}

.scroll-indicator span {
    font-size: var(--text-caption);
    color: var(--color-text-muted);
    letter-spacing: 2px;
    text-transform: uppercase;
}

@keyframes scrollWheel {
    0% { opacity: 1; transform: translateX(-50%) translateY(0); }
    50% { opacity: 0.5; }
    100% { opacity: 0; transform: translateX(-50%) translateY(12px); }
}

/* ============================================================
   6. Buttons
   ============================================================ */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-8);
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: var(--text-small);
    border-radius: var(--radius-full);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
    letter-spacing: 0.5px;
}

.btn-primary {
    background: var(--gradient-accent);
    color: var(--color-bg-primary);
    box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow-lg);
}

.btn-outline {
    border: 1.5px solid var(--color-accent);
    color: var(--color-accent);
    background: transparent;
}

.btn-outline:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

/* ============================================================
   7. About Section
   ============================================================ */
.about-intro {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-16);
    align-items: center;
    margin-bottom: var(--space-24);
}

.about-text p {
    color: var(--color-text-secondary);
    line-height: var(--leading-relaxed);
    margin-bottom: var(--space-6);
    font-size: var(--text-body-lg);
}

.about-image {
    position: relative;
    border-radius: var(--radius-xl);
    overflow: hidden;
    aspect-ratio: 4/3;
}

.about-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

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

.about-image::after {
    content: '';
    position: absolute;
    inset: 0;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    pointer-events: none;
}

/* Feature Cards */
.feature-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-6);
    margin-bottom: var(--space-24);
}

.feature-card {
    background: var(--gradient-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-8);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(300px circle at var(--mouse-x, 50%) var(--mouse-y, 50%), rgba(212,168,67,0.06), transparent 40%);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.feature-card:hover::before {
    opacity: 1;
}

.feature-card:hover {
    transform: translateY(-8px) scale(1.02);
    border-color: var(--color-border-hover);
    box-shadow: var(--shadow-glow-lg);
}

.feature-card .card-icon {
    width: 56px;
    height: 56px;
    background: rgba(212, 168, 67, 0.1);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-6);
    font-size: 1.5rem;
}

.feature-card h3 {
    font-family: var(--font-heading);
    font-size: var(--text-h3);
    font-weight: 600;
    margin-bottom: var(--space-3);
}

.feature-card p {
    color: var(--color-text-secondary);
    font-size: var(--text-small);
    line-height: var(--leading-relaxed);
}

/* ============================================================
   8. Timeline
   ============================================================ */
.timeline {
    position: relative;
    padding: var(--space-8) 0;
    margin-bottom: var(--space-24);
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, transparent, var(--color-accent), transparent);
    transform: translateX(-50%);
}

.timeline-item {
    display: flex;
    align-items: center;
    margin-bottom: var(--space-12);
    position: relative;
}

.timeline-item:nth-child(odd) {
    flex-direction: row;
}

.timeline-item:nth-child(even) {
    flex-direction: row-reverse;
}

.timeline-content {
    width: 45%;
    background: var(--gradient-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    transition: all var(--transition-normal);
}

.timeline-content:hover {
    border-color: var(--color-border-hover);
    box-shadow: var(--shadow-glow);
}

.timeline-dot {
    position: absolute;
    left: 50%;
    width: 16px;
    height: 16px;
    background: var(--color-accent);
    border-radius: 50%;
    transform: translateX(-50%);
    box-shadow: 0 0 20px rgba(212, 168, 67, 0.4);
    z-index: 2;
}

.timeline-year {
    font-family: var(--font-heading);
    font-size: var(--text-h3);
    font-weight: 700;
    color: var(--color-accent);
    margin-bottom: var(--space-2);
}

.timeline-desc {
    color: var(--color-text-secondary);
    font-size: var(--text-small);
    line-height: var(--leading-relaxed);
}

/* ============================================================
   9. Philosophy Cards
   ============================================================ */
.philosophy-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-6);
}

.philosophy-card {
    background: var(--gradient-glass);
    backdrop-filter: blur(16px);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--space-10);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.philosophy-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(300px circle at var(--mouse-x, 50%) var(--mouse-y, 50%), rgba(212,168,67,0.06), transparent 40%);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.philosophy-card:hover::before {
    opacity: 1;
}

.philosophy-card:hover {
    transform: translateY(-6px);
    border-color: var(--color-border-hover);
    box-shadow: var(--shadow-glow);
}

.philosophy-card .card-label {
    font-family: var(--font-heading);
    font-size: var(--text-caption);
    text-transform: uppercase;
    letter-spacing: 3px;
    color: var(--color-accent);
    margin-bottom: var(--space-3);
}

.philosophy-card h3 {
    font-family: var(--font-heading);
    font-size: var(--text-h3);
    font-weight: 700;
    margin-bottom: var(--space-4);
}

.philosophy-card p {
    color: var(--color-text-secondary);
    line-height: var(--leading-relaxed);
    font-size: var(--text-small);
}

/* ============================================================
   10. Services Section
   ============================================================ */
.services {
    background: var(--color-bg-secondary);
}

.service-block {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-16);
    align-items: center;
    margin-bottom: var(--space-16);
}

.service-block.reverse {
    direction: rtl;
}

.service-block.reverse > * {
    direction: ltr;
}

.service-image {
    border-radius: var(--radius-xl);
    overflow: hidden;
    position: relative;
    aspect-ratio: 16/10;
}

.service-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

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

.service-info h3 {
    font-family: var(--font-heading);
    font-size: var(--text-h2);
    font-weight: 700;
    margin-bottom: var(--space-4);
}

.service-info p {
    color: var(--color-text-secondary);
    line-height: var(--leading-relaxed);
    margin-bottom: var(--space-6);
}

.service-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
}

.service-tag {
    padding: var(--space-1) var(--space-4);
    background: rgba(212, 168, 67, 0.1);
    border: 1px solid rgba(212, 168, 67, 0.2);
    border-radius: var(--radius-full);
    font-size: var(--text-caption);
    color: var(--color-accent);
}

/* Section Divider */
.section-divider {
    position: relative;
    margin-top: -1px;
}

.section-divider svg {
    display: block;
    width: 100%;
    height: 80px;
}

/* ============================================================
   11. Products Section
   ============================================================ */
.product-filters {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: var(--space-3);
    margin-bottom: var(--space-12);
}

.filter-btn {
    padding: var(--space-2) var(--space-6);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    font-size: var(--text-small);
    color: var(--color-text-secondary);
    transition: all var(--transition-normal);
    cursor: pointer;
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--gradient-accent);
    color: var(--color-bg-primary);
    border-color: var(--color-accent);
    box-shadow: var(--shadow-glow);
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: var(--space-4);
}

.product-card {
    background: var(--gradient-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: all var(--transition-normal);
    position: relative;
    cursor: pointer;
    display: flex;
    flex-direction: column;
}

.product-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(400px circle at var(--mouse-x, 50%) var(--mouse-y, 50%), rgba(212,168,67,0.08), transparent 40%);
    opacity: 0;
    transition: opacity var(--transition-normal);
    z-index: 1;
    pointer-events: none;
}

.product-card:hover::before {
    opacity: 1;
}

.product-card:hover {
    transform: translateY(-8px);
    border-color: var(--color-border-hover);
    box-shadow: var(--shadow-lg);
}

.product-card-image {
    aspect-ratio: 4/3;
    overflow: hidden;
    position: relative;
}

.product-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

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

.product-card-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(10, 15, 28, 0.8), transparent);
    display: flex;
    align-items: flex-end;
    padding: var(--space-4);
    opacity: 0;
    transition: opacity var(--transition-normal);
    z-index: 2;
}

.product-card:hover .product-card-overlay {
    opacity: 1;
}

.product-card-body {
    padding: var(--space-4);
    position: relative;
    z-index: 2;
}

.product-card-body h4 {
    font-family: var(--font-heading);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--space-2);
}

.product-card-body .product-category {
    font-size: var(--text-caption);
    color: var(--color-accent);
    padding: var(--space-1) var(--space-3);
    background: rgba(212, 168, 67, 0.1);
    border-radius: var(--radius-full);
    display: inline-block;
}

/* ============================================================
   20. Floating Sidebar (CKT Reference)
   ============================================================ */
.floating-sidebar {
    position: fixed;
    right: 20px;
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    flex-direction: column;
    gap: 12px;
    z-index: 999;
}

.float-item {
    width: 50px;
    height: 50px;
    background: var(--gradient-accent);
    color: #0A0F1C;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
    cursor: pointer;
    border: 1px solid rgba(255,255,255,0.2);
}

.float-item:hover {
    transform: translateX(-5px) scale(1.1);
    box-shadow: var(--shadow-glow-lg);
    background: #FFD700;
}

.float-item.line { background: #06C755; color: #fff; }
.float-item.email { background: #EA4335; color: #fff; }

/* ============================================================
   21. Production Flow Section
   ============================================================ */
.flow-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 20px;
    margin-top: var(--space-12);
}

.flow-step {
    text-align: center;
    position: relative;
}

.flow-step::after {
    content: '→';
    position: absolute;
    right: -10px;
    top: 30px;
    font-size: 1.5rem;
    color: var(--color-accent);
    opacity: 0.5;
}

.flow-step:last-child::after { display: none; }

.step-icon {
    width: 70px;
    height: 70px;
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 15px;
    font-size: 1.5rem;
    transition: all 0.3s ease;
}

.flow-step:hover .step-icon {
    border-color: var(--color-accent);
    box-shadow: var(--shadow-glow);
    transform: translateY(-5px);
}

.flow-step h4 {
    font-size: 0.9rem;
    font-weight: 700;
    margin-bottom: 5px;
}

.flow-step p {
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

@media (max-width: 1024px) {
    .flow-grid { grid-template-columns: repeat(3, 1fr); gap: 30px; }
    .flow-step::after { display: none; }
}

@media (max-width: 600px) {
    .flow-grid { grid-template-columns: repeat(2, 1fr); }
}

.quality-content {
    text-align: center;
}

.iso-badge {
    width: 120px;
    height: 120px;
    margin: 0 auto var(--space-10);
    background: linear-gradient(135deg, rgba(212,168,67,0.15), rgba(212,168,67,0.05));
    border: 2px solid var(--color-accent);
    border-radius: 50%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    font-family: var(--font-heading);
    transition: all var(--transition-normal);
    cursor: pointer;
    box-shadow: var(--shadow-glow);
}

.iso-badge:hover {
    transform: scale(1.1) rotate(5deg);
    border-color: #FFD700;
    box-shadow: var(--shadow-glow-lg);
}
    font-weight: 800;
    font-size: 1rem;
    color: var(--color-accent);
    animation: glowPulse 3s infinite;
    flex-direction: column;
    line-height: 1.3;
}

.iso-badge .iso-label {
    font-size: 0.65rem;
    letter-spacing: 2px;
}

.iso-badge .iso-number {
    font-size: 1.3rem;
}

@keyframes glowPulse {
    0%, 100% { box-shadow: 0 0 20px rgba(212, 168, 67, 0.2); }
    50% { box-shadow: 0 0 40px rgba(212, 168, 67, 0.4), 0 0 80px rgba(212, 168, 67, 0.1); }
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-6);
    margin: var(--space-12) 0;
}

.stat-card {
    text-align: center;
    padding: var(--space-8);
    background: var(--gradient-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: all var(--transition-normal);
}

.stat-card:hover {
    border-color: var(--color-border-hover);
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}

.stat-card .stat-number {
    font-family: var(--font-heading);
    font-size: var(--text-h1);
    font-weight: 800;
    color: var(--color-accent);
    display: block;
}

.stat-card .stat-suffix {
    font-size: var(--text-h3);
}

.stat-card .stat-label {
    color: var(--color-text-muted);
    font-size: var(--text-small);
    margin-top: var(--space-2);
}

.quality-principles {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-4);
    margin-top: var(--space-12);
}

.principle-item {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    padding: var(--space-4) var(--space-8);
    background: rgba(220, 38, 38, 0.05);
    border: 1px solid rgba(220, 38, 38, 0.15);
    border-radius: var(--radius-lg);
    font-size: var(--text-body-lg);
    font-weight: 500;
    min-width: 320px;
    transition: all var(--transition-normal);
}

.principle-item:hover {
    background: rgba(220, 38, 38, 0.1);
    transform: translateX(8px);
}

.principle-item .principle-icon {
    font-size: 1.5rem;
}

/* ============================================================
   13. Contact Section
   ============================================================ */
.contact-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: var(--space-12);
    align-items: start;
}

.contact-form {
    background: var(--gradient-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--space-10);
}

.form-group {
    position: relative;
    margin-bottom: var(--space-6);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-6);
}

.form-group label {
    display: block;
    font-size: var(--text-small);
    color: var(--color-text-muted);
    margin-bottom: var(--space-2);
    font-weight: 500;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text-primary);
    transition: all var(--transition-normal);
    font-size: var(--text-body);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(212, 168, 67, 0.1);
    background: rgba(255, 255, 255, 0.05);
}

.form-group textarea {
    min-height: 120px;
    resize: vertical;
}

.form-group select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2394A3B8' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: var(--space-10);
}

.form-group select option {
    background: var(--color-bg-card);
    color: var(--color-text-primary);
}

.btn-submit {
    width: 100%;
    padding: var(--space-4);
    font-size: var(--text-body);
}

/* Contact Info */
.contact-info-wrapper {
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
}

.contact-info-card {
    background: var(--gradient-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--space-8);
}

.contact-info-card h3 {
    font-family: var(--font-heading);
    font-size: var(--text-h3);
    margin-bottom: var(--space-6);
}

.contact-item {
    display: flex;
    align-items: center; /* Vertically centered for multi-line support */
    gap: var(--space-4);
    margin-bottom: var(--space-4);
    color: var(--color-text-secondary);
    font-size: var(--text-small);
}

.contact-item a {
    color: inherit;
    transition: color var(--transition-normal);
    line-height: var(--leading-normal);
}

.contact-item a:hover {
    color: var(--color-accent);
}

.contact-item:last-child {
    margin-bottom: 0;
}

.contact-item i {
    color: var(--color-accent);
    flex-shrink: 0;
    display: flex;
    align-items: center;
}

.map-container {
    border-radius: var(--radius-xl);
    overflow: hidden;
    border: 1px solid var(--color-border);
    aspect-ratio: 16/10;
}

.map-container iframe {
    width: 100%;
    height: 100%;
    border: none;
    filter: grayscale(0.6) brightness(0.7) contrast(1.1);
}

/* ============================================================
   14. Footer
   ============================================================ */
.footer {
    background: var(--color-bg-elevated);
    padding: var(--space-16) 0 var(--space-8);
    border-top: 1px solid var(--color-border);
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr;
    gap: var(--space-12);
    margin-bottom: var(--space-12);
}

.footer-brand .footer-logo {
    font-family: var(--font-heading);
    font-size: 1.35rem;
    font-weight: 700;
    margin-bottom: var(--space-4);
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.footer-brand .footer-logo .logo-icon {
    width: 36px;
    height: 36px;
    background: var(--gradient-accent);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 900;
    font-size: 0.9rem;
    color: var(--color-bg-primary);
}

.footer-brand p {
    color: var(--color-text-muted);
    font-size: var(--text-small);
    line-height: var(--leading-relaxed);
    max-width: 320px;
}

.footer h4 {
    font-family: var(--font-heading);
    font-size: var(--text-body);
    font-weight: 600;
    margin-bottom: var(--space-6);
}

.footer-links li {
    margin-bottom: var(--space-3);
}

.footer-links a {
    color: var(--color-text-muted);
    font-size: var(--text-small);
    transition: all var(--transition-normal);
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
}

.footer-links a:hover {
    color: var(--color-accent);
    transform: translateX(4px);
}

.footer-contact .contact-item {
    font-size: var(--text-small);
    margin-bottom: var(--space-3);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--space-8);
    border-top: 1px solid var(--color-border);
    color: var(--color-text-muted);
    font-size: var(--text-caption);
}

/* Back to Top */
.back-to-top {
    position: fixed;
    bottom: var(--space-8);
    right: var(--space-8);
    width: 48px;
    height: 48px;
    background: var(--gradient-accent);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-bg-primary);
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition-normal);
    z-index: 100;
    box-shadow: var(--shadow-glow);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow-lg);
}

/* ============================================================
   15. Loading Screen
   ============================================================ */
.loading-screen {
    position: fixed;
    inset: 0;
    background: var(--color-bg-primary);
    z-index: 10000;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    transition: transform 0.8s var(--ease-out-expo);
}

.loading-screen.hide {
    transform: translateY(-100%);
}

.loading-logo {
    font-family: var(--font-heading);
    font-size: var(--text-h2);
    font-weight: 800;
    margin-bottom: var(--space-8);
    opacity: 0;
    animation: loadFadeIn 0.6s ease 0.2s forwards;
}

.loading-logo .accent {
    color: var(--color-accent);
}

.loading-bar {
    width: 200px;
    height: 3px;
    background: var(--color-border);
    border-radius: var(--radius-full);
    overflow: hidden;
    opacity: 0;
    animation: loadFadeIn 0.4s ease 0.5s forwards;
}

.loading-bar::after {
    content: '';
    display: block;
    width: 0;
    height: 100%;
    background: var(--gradient-accent);
    border-radius: var(--radius-full);
    animation: loadProgress 1.2s ease 0.6s forwards;
}

@keyframes loadFadeIn {
    to { opacity: 1; }
}

@keyframes loadProgress {
    to { width: 100%; }
}

/* ============================================================
   16. Scroll Animations
   ============================================================ */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.7s var(--ease-out-expo);
}

.reveal.revealed {
    opacity: 1;
    transform: translateY(0);
}

.reveal-left {
    opacity: 0;
    transform: translateX(-50px);
    transition: all 0.7s var(--ease-out-expo);
}

.reveal-left.revealed {
    opacity: 1;
    transform: translateX(0);
}

.reveal-right {
    opacity: 0;
    transform: translateX(50px);
    transition: all 0.7s var(--ease-out-expo);
}

.reveal-right.revealed {
    opacity: 1;
    transform: translateX(0);
}

.reveal-scale {
    opacity: 0;
    transform: scale(0.9);
    transition: all 0.7s var(--ease-out-expo);
}

.reveal-scale.revealed {
    opacity: 1;
    transform: scale(1);
}

/* Stagger children */
.stagger-children .reveal:nth-child(1) { transition-delay: 0ms; }
.stagger-children .reveal:nth-child(2) { transition-delay: 80ms; }
.stagger-children .reveal:nth-child(3) { transition-delay: 160ms; }
.stagger-children .reveal:nth-child(4) { transition-delay: 240ms; }
.stagger-children .reveal:nth-child(5) { transition-delay: 320ms; }
.stagger-children .reveal:nth-child(6) { transition-delay: 400ms; }
.stagger-children .reveal:nth-child(7) { transition-delay: 480ms; }
.stagger-children .reveal:nth-child(8) { transition-delay: 560ms; }

/* ============================================================
   17. Hero Load animations
   ============================================================ */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.hero.loaded .hero-label {
    animation: fadeInUp 0.7s var(--ease-out-expo) 0.2s forwards;
}

.hero.loaded .hero-title {
    animation: fadeInUp 0.8s var(--ease-out-expo) 0.4s forwards;
}

.hero.loaded .hero-subtitle {
    animation: fadeInUp 0.7s var(--ease-out-expo) 0.7s forwards;
}

.hero.loaded .hero-cta {
    animation: fadeInUp 0.7s var(--ease-spring) 0.9s forwards;
}

.hero.loaded .hero-stats {
    animation: fadeInUp 0.8s var(--ease-out-expo) 1.1s forwards;
}

/* ============================================================
   18. Responsive
   ============================================================ */
@media (max-width: 1024px) {
    .about-intro {
        grid-template-columns: 1fr;
        gap: var(--space-8);
    }

    .feature-cards {
        grid-template-columns: 1fr;
    }

    .service-block,
    .service-block.reverse {
        grid-template-columns: 1fr;
        direction: ltr;
    }

    .contact-grid {
        grid-template-columns: 1fr;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: var(--space-8);
    }

    .timeline::before {
        left: 24px;
    }

    .timeline-item,
    .timeline-item:nth-child(even) {
        flex-direction: row;
        padding-left: 60px;
    }

    .timeline-content {
        width: 100%;
    }

    .timeline-dot {
        left: 24px;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .hamburger {
        display: flex;
    }

    .hero-stats {
        flex-direction: column;
        align-items: center;
    }

    .hero-stat {
        width: 100%;
        max-width: 240px;
    }

    .philosophy-grid {
        grid-template-columns: 1fr;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .stats-grid {
        grid-template-columns: 1fr 1fr;
    }

    .product-grid {
        grid-template-columns: 1fr;
    }

    .footer-bottom {
        flex-direction: column;
        gap: var(--space-4);
        text-align: center;
    }

    .principle-item {
        min-width: auto;
        width: 100%;
    }
}

@media (max-width: 480px) {
    :root {
        --nav-height: 64px;
    }

    .container {
        padding: 0 var(--space-4);
    }

    .hero-content {
        padding: var(--space-4);
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }
}

/* ============================================================
   19. Reduced Motion
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }

    html {
        scroll-behavior: auto;
    }

    .reveal, .reveal-left, .reveal-right, .reveal-scale {
        opacity: 1;
        transform: none;
    }
}

/* ============================================================
   20. Carousel Adjustments
   ============================================================ */
.hero-carousel {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    z-index: 2;
}

.hero-slide {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    opacity: 0;
    transition: opacity 1s ease-in-out;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-slide.active {
    opacity: 1;
    z-index: 3;
}

.carousel-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    z-index: 5;
    background: rgba(255, 255, 255, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.5);
    color: white;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-normal);
}
.carousel-btn:hover { background: var(--color-primary); border-color: var(--color-primary); }
.carousel-btn.prev { left: var(--space-6); }
.carousel-btn.next { right: var(--space-6); }

.carousel-dots {
    position: absolute;
    bottom: var(--space-20);
    left: 50%;
    transform: translateX(-50%);
    z-index: 5;
    display: flex;
    gap: var(--space-2);
}

.carousel-dots .dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    cursor: pointer;
    transition: all var(--transition-normal);
}
.carousel-dots .dot.active { background: var(--color-accent); transform: scale(1.2); }

@media (max-width: 768px) {
    .carousel-btn { display: none; }
}

/* ============================================================
   21. Products Sidebar Layout
   ============================================================ */
.products-layout {
    display: grid;
    grid-template-columns: 240px 1fr;
    gap: var(--space-8);
    align-items: start;
}

.products-sidebar {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: 20px; /* 大圓角 */
    padding: var(--space-8);
    position: sticky;
    top: calc(var(--nav-height) + var(--space-6));
    box-shadow: var(--shadow-lg);
}

.sidebar-title {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--space-6);
    padding-bottom: var(--space-3);
    border-bottom: 1.5px solid var(--color-accent);
    color: var(--color-text-primary);
}

.category-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
}

.category-item {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-4) var(--space-5);
    cursor: pointer;
    border-radius: 12px;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    color: var(--color-text-secondary);
    font-weight: 500;
    border: none;
}

.category-item:hover {
    background: rgba(212, 168, 67, 0.1);
    color: var(--color-accent);
}

.category-item.active {
    background: var(--color-accent);
    color: var(--color-bg-primary);
    font-weight: 700;
}

.category-item i {
    width: 16px;
    height: 16px;
}

.product-card {
    background: var(--color-bg-elevated);
    border-radius: 24px; /* 極大圓角 */
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    border: 1px solid var(--color-border);
    cursor: pointer;
}

.product-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
}

.product-card .card-image {
    aspect-ratio: 4/3;
    overflow: hidden;
    background: rgba(0, 0, 0, 0.2);
}

.product-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.product-card:hover img {
    transform: translateZ(30px) scale(1.08);
}

/* Mask Slide Animation */
.mask-slide {
    display: inline-block;
    overflow: hidden;
    vertical-align: bottom;
}

.mask-slide-inner {
    display: block;
    transform: translateY(100%);
    transition: transform 1s var(--ease-out-expo);
}

.revealed .mask-slide-inner {
    transform: translateY(0);
}

.product-card .card-content {
    padding: var(--space-4);
    background: var(--color-bg-card);
}

.product-card h4 {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-text-primary);
    margin: 0;
}

@media (max-width: 900px) {
    .products-layout { grid-template-columns: 1fr; }
    .products-sidebar { position: static; margin-bottom: var(--space-8); padding: var(--space-6); }
    .category-list { flex-direction: row; flex-wrap: wrap; }
}

/* Back to Top Button */
.back-to-top {
    position: fixed;
    right: 30px;
    bottom: 30px;
    width: 50px;
    height: 50px;
    background: var(--color-accent);
    color: #FFFFFF;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 15px rgba(212, 168, 67, 0.4);
    cursor: pointer;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    border: 2px solid #FFFFFF;
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: translateY(-5px);
    background: var(--color-accent-dark);
}

/* ============================================================
   22. Product Modal
   ============================================================ */
.product-modal {
    position: fixed;
    inset: 0;
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-normal);
}

.product-modal.show {
    opacity: 1;
    pointer-events: all;
}

.modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(10, 15, 28, 0.85);
    backdrop-filter: blur(10px);
}

.modal-content {
    position: relative;
    width: 90%;
    max-width: 960px;
    max-height: 90vh;
    background: var(--color-bg-primary);
    border-radius: var(--radius-xl);
    overflow-y: auto;
    padding: var(--space-10);
    box-shadow: var(--shadow-xl);
    z-index: 2001;
    transform: translateY(20px);
    transition: transform var(--transition-normal);
}

.product-modal.show .modal-content {
    transform: translateY(0);
}

.modal-close {
    position: absolute;
    top: var(--space-4);
    right: var(--space-4);
    color: var(--color-text-secondary);
    background: rgba(0,0,0,0.05);
    border-radius: 50%;
    width: 44px; height: 44px;
    display: flex; align-items: center; justify-content: center;
    transition: all var(--transition-normal);
    z-index: 10;
    cursor: pointer;
    border: none;
}
.modal-close:hover { background: rgba(0,0,0,0.1); color: var(--color-text-primary); transform: rotate(90deg); }

.breadcrumb {
    font-size: var(--text-small);
    color: var(--color-text-muted);
    margin-bottom: var(--space-6);
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
}
.breadcrumb .current { color: var(--color-accent); font-weight: 600; }
.breadcrumb .divider { color: var(--color-border); }

.modal-body {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: var(--space-10);
    align-items: center;
}

.modal-image-wrapper {
    background: var(--color-bg-secondary);
    border-radius: var(--radius-lg);
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-4);
    aspect-ratio: 4/3;
    border: 1px solid var(--color-border);
}
.modal-image-wrapper img {
    max-height: 100%;
    max-width: 100%;
    object-fit: contain;
    transition: transform var(--transition-normal);
}
.modal-image-wrapper:hover img { transform: scale(1.05); }

.modal-details {
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
}

.modal-divider {
    width: 60px; height: 3px; background: var(--color-accent); border-radius: 3px;
}

.modal-description {
    font-size: var(--text-body-lg); color: var(--color-text-secondary); line-height: var(--leading-relaxed);
}

.modal-specs {
    display: flex; flex-direction: column; gap: var(--space-4);
    background: var(--color-bg-secondary); padding: var(--space-6); border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
}
.spec-row {
    display: flex; align-items: flex-start; gap: var(--space-3); font-size: var(--text-body);
}
.spec-text { color: var(--color-text-primary); font-weight: 500; }

.modal-cta { margin-top: var(--space-2); }

@media (max-width: 768px) {
    .modal-body { grid-template-columns: 1fr; gap: var(--space-6); }
    .modal-content { padding: var(--space-6); }
    .modal-image-wrapper { aspect-ratio: auto; min-height: 250px; }
}