/* ============================================
   TSGUANQIAN.COM - Main Stylesheet
   Tesla-Inspired Design System
   ============================================ */

/* CSS Variables - Design Tokens */
:root {
    /* Color Palette */
    --color-bg-primary: #050505;
    --color-bg-secondary: #0a0a0a;
    --color-bg-tertiary: #111111;
    --color-bg-card: #0c0c0c;
    --color-bg-elevated: #161616;

    --color-text-primary: #ffffff;
    --color-text-secondary: #a0a0a0;
    --color-text-tertiary: #666666;
    --color-text-muted: #444444;

    --color-accent: #e31937;
    --color-accent-hover: #ff2a47;
    --color-accent-dim: #b8142d;
    --color-accent-glow: rgba(227, 25, 55, 0.4);

    --color-border: #1f1f1f;
    --color-border-light: #2a2a2a;
    --color-border-accent: rgba(227, 25, 55, 0.3);

    --color-success: #00d97e;
    --color-warning: #ffb800;
    --color-error: #ff3838;
    --color-info: #00b8ff;

    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-mono: 'JetBrains Mono', 'SF Mono', Monaco, Consolas, 'Courier New', monospace;
    --font-display: 'Inter', -apple-system, sans-serif;

    /* Spacing Scale */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --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;

    /* Layout */
    --container-max: 1280px;
    --container-wide: 1440px;
    --container-narrow: 960px;
    --header-height: 72px;
    --border-radius: 4px;
    --border-radius-lg: 8px;
    --border-radius-xl: 12px;

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-spring: 600ms cubic-bezier(0.34, 1.56, 0.64, 1);

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 24px 64px rgba(0, 0, 0, 0.6);
    --shadow-glow: 0 0 32px var(--color-accent-glow);

    /* Z-index scale */
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-overlay: 300;
    --z-modal: 400;
    --z-toast: 500;
}

/* ============================================
   Base Reset & Global Styles
   ============================================ */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
    scroll-behavior: smooth;
    overflow-x: hidden;
}

body {
    font-family: var(--font-primary);
    font-weight: 400;
    line-height: 1.6;
    color: var(--color-text-primary);
    background-color: var(--color-bg-primary);
    overflow-x: hidden;
    min-height: 100vh;
    position: relative;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(circle at 20% 50%, rgba(227, 25, 55, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(227, 25, 55, 0.03) 0%, transparent 50%);
    pointer-events: none;
    z-index: -1;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.02em;
    color: var(--color-text-primary);
}

h1 { font-size: clamp(2.5rem, 5vw, 4.5rem); }
h2 { font-size: clamp(2rem, 4vw, 3.25rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2.25rem); }
h4 { font-size: clamp(1.25rem, 2vw, 1.75rem); }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

p {
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: var(--space-4);
}

a {
    color: var(--color-text-primary);
    text-decoration: none;
    transition: color var(--transition-base);
    cursor: pointer;
}

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

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

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
    color: inherit;
}

ul, ol {
    list-style: none;
}

::selection {
    background-color: var(--color-accent);
    color: var(--color-text-primary);
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: var(--color-bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--color-border-light);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-accent);
}

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

.container-wide {
    max-width: var(--container-wide);
}

.container-narrow {
    max-width: var(--container-narrow);
}

.section {
    padding: var(--space-24) 0;
    position: relative;
}

.section-sm {
    padding: var(--space-16) 0;
}

.section-lg {
    padding: var(--space-32) 0;
}

@media (max-width: 768px) {
    .section { padding: var(--space-16) 0; }
    .section-sm { padding: var(--space-12) 0; }
    .section-lg { padding: var(--space-20) 0; }
}

/* Grid System */
.grid {
    display: grid;
    gap: var(--space-6);
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-6 { grid-template-columns: repeat(6, 1fr); }

@media (max-width: 1024px) {
    .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
    .grid-6 { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 640px) {
    .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
    .grid-6 { grid-template-columns: repeat(2, 1fr); }
}

/* ============================================
   Header / Navigation
   ============================================ */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    background-color: rgba(5, 5, 5, 0.7);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    border-bottom: 1px solid transparent;
    z-index: var(--z-sticky);
    transition: all var(--transition-base);
}

.site-header.scrolled {
    background-color: rgba(5, 5, 5, 0.92);
    border-bottom-color: var(--color-border);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    max-width: var(--container-wide);
    margin: 0 auto;
    padding: 0 var(--space-6);
}

.logo-link {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    transition: opacity var(--transition-base);
}

.logo-link:hover { opacity: 0.85; }

.logo-link img {
    height: 40px;
    width: auto;
}

.main-nav {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.nav-link {
    position: relative;
    padding: var(--space-2) var(--space-4);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    letter-spacing: 0.02em;
    transition: color var(--transition-base);
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

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

.nav-link::after {
    content: '';
    position: absolute;
    left: var(--space-4);
    right: var(--space-4);
    bottom: 0;
    height: 2px;
    background: var(--color-accent);
    transform: scaleX(0);
    transform-origin: center;
    transition: transform var(--transition-base);
}

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

.nav-link svg {
    width: 16px;
    height: 16px;
    opacity: 0.7;
}

.header-cta {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.menu-toggle {
    display: none;
    width: 40px;
    height: 40px;
    border-radius: var(--border-radius);
    align-items: center;
    justify-content: center;
    transition: background var(--transition-base);
}

.menu-toggle:hover {
    background: var(--color-bg-tertiary);
}

.menu-toggle span {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--color-text-primary);
    position: relative;
    transition: all var(--transition-base);
}

.menu-toggle span::before,
.menu-toggle span::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 2px;
    background: var(--color-text-primary);
    left: 0;
    transition: all var(--transition-base);
}

.menu-toggle span::before { top: -6px; }
.menu-toggle span::after { top: 6px; }

.menu-toggle.active span { background: transparent; }
.menu-toggle.active span::before { transform: rotate(45deg); top: 0; }
.menu-toggle.active span::after { transform: rotate(-45deg); top: 0; }

@media (max-width: 900px) {
    .main-nav {
        position: fixed;
        top: var(--header-height);
        left: 0;
        width: 100%;
        height: calc(100vh - var(--header-height));
        background: var(--color-bg-primary);
        flex-direction: column;
        justify-content: flex-start;
        padding: var(--space-8) var(--space-6);
        gap: var(--space-4);
        transform: translateX(100%);
        transition: transform var(--transition-base);
        border-top: 1px solid var(--color-border);
    }
    .main-nav.active {
        transform: translateX(0);
    }
    .nav-link {
        font-size: 1.125rem;
        padding: var(--space-4);
        width: 100%;
    }
    .menu-toggle { display: flex; }
}

/* ============================================
   Buttons
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    font-family: inherit;
    font-size: 0.875rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    text-transform: uppercase;
    border: 1px solid transparent;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
    position: relative;
    overflow: hidden;
    white-space: nowrap;
}

.btn-primary {
    background: var(--color-accent);
    color: var(--color-text-primary);
}

.btn-primary:hover {
    background: var(--color-accent-hover);
    color: var(--color-text-primary);
    transform: translateY(-1px);
    box-shadow: var(--shadow-glow);
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.6s ease;
}

.btn-primary:hover::before {
    left: 100%;
}

.btn-secondary {
    background: transparent;
    color: var(--color-text-primary);
    border-color: var(--color-border-light);
}

.btn-secondary:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
    background: rgba(227, 25, 55, 0.05);
}

.btn-ghost {
    background: transparent;
    color: var(--color-text-primary);
}

.btn-ghost:hover {
    color: var(--color-accent);
}

.btn-large {
    padding: var(--space-4) var(--space-8);
    font-size: 1rem;
}

.btn svg {
    width: 16px;
    height: 16px;
    transition: transform var(--transition-base);
}

.btn:hover svg {
    transform: translateX(3px);
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    padding-top: var(--header-height);
    isolation: isolate;
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: -2;
}

.hero-bg svg {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 0%, rgba(5,5,5,0.4) 50%, var(--color-bg-primary) 100%);
    z-index: -1;
}

.hero-content {
    position: relative;
    text-align: center;
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 var(--space-6);
    z-index: 2;
}

.hero-tag {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    background: rgba(227, 25, 55, 0.1);
    border: 1px solid var(--color-border-accent);
    border-radius: 100px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--color-accent);
    margin-bottom: var(--space-6);
    animation: fadeInUp 1s 0.2s both;
}

.hero-tag::before {
    content: '';
    width: 6px;
    height: 6px;
    background: var(--color-accent);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

.hero-title {
    margin-bottom: var(--space-6);
    font-weight: 800;
    letter-spacing: -0.04em;
    animation: fadeInUp 1s 0.4s both;
}

.hero-title .highlight {
    background: linear-gradient(135deg, var(--color-accent) 0%, #ff6b7a 50%, var(--color-accent) 100%);
    background-size: 200% auto;
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
    animation: shimmer 4s linear infinite;
}

.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--color-text-secondary);
    max-width: 720px;
    margin: 0 auto var(--space-8);
    line-height: 1.6;
    animation: fadeInUp 1s 0.6s both;
}

.hero-cta {
    display: flex;
    gap: var(--space-4);
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 1s 0.8s both;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--space-6);
    margin-top: var(--space-16);
    padding-top: var(--space-8);
    border-top: 1px solid var(--color-border);
    animation: fadeInUp 1s 1s both;
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: clamp(1.75rem, 3vw, 2.5rem);
    font-weight: 800;
    color: var(--color-text-primary);
    letter-spacing: -0.02em;
    margin-bottom: var(--space-2);
    background: linear-gradient(135deg, #ffffff 0%, var(--color-accent) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    font-variant-numeric: tabular-nums;
}

.stat-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--color-text-tertiary);
    font-weight: 500;
}

/* Scroll indicator */
.scroll-indicator {
    position: absolute;
    bottom: var(--space-8);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-2);
    color: var(--color-text-tertiary);
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    animation: fadeInUp 1s 1.5s both;
}

.scroll-indicator .mouse {
    width: 22px;
    height: 36px;
    border: 1.5px solid var(--color-text-tertiary);
    border-radius: 11px;
    position: relative;
}

.scroll-indicator .mouse::before {
    content: '';
    position: absolute;
    top: 6px;
    left: 50%;
    width: 3px;
    height: 8px;
    background: var(--color-accent);
    border-radius: 2px;
    transform: translateX(-50%);
    animation: scrollWheel 1.5s infinite;
}

/* ============================================
   Section Headers
   ============================================ */
.section-header {
    text-align: center;
    max-width: 800px;
    margin: 0 auto var(--space-16);
}

.section-header.left {
    text-align: left;
    margin-left: 0;
}

.section-tag {
    display: inline-block;
    padding: var(--space-2) var(--space-3);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    color: var(--color-accent);
    background: rgba(227, 25, 55, 0.08);
    border: 1px solid var(--color-border-accent);
    border-radius: 100px;
    margin-bottom: var(--space-5);
}

.section-title {
    margin-bottom: var(--space-5);
    font-weight: 800;
    letter-spacing: -0.03em;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
    max-width: 680px;
    margin: 0 auto;
}

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

/* ============================================
   Cards
   ============================================ */
.card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    padding: var(--space-8);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
    height: 100%;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
    opacity: 0;
    transition: opacity var(--transition-base);
}

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

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

.card-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(227, 25, 55, 0.08);
    border: 1px solid var(--color-border-accent);
    border-radius: var(--border-radius);
    color: var(--color-accent);
    margin-bottom: var(--space-5);
    transition: all var(--transition-base);
}

.card:hover .card-icon {
    background: var(--color-accent);
    color: var(--color-text-primary);
    transform: scale(1.05) rotate(-3deg);
}

.card-icon svg {
    width: 32px;
    height: 32px;
}

.card-title {
    font-size: 1.25rem;
    margin-bottom: var(--space-3);
    font-weight: 700;
}

.card-text {
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
    line-height: 1.7;
    margin-bottom: 0;
}

.card-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    margin-top: var(--space-5);
    color: var(--color-accent);
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.card-link svg {
    width: 14px;
    height: 14px;
    transition: transform var(--transition-base);
}

.card-link:hover svg {
    transform: translateX(4px);
}

/* ============================================
   Service Cards (larger)
   ============================================ */
.service-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    padding: var(--space-8);
    position: relative;
    overflow: hidden;
    transition: all var(--transition-base);
    height: 100%;
    display: flex;
    flex-direction: column;
}

.service-card::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-accent);
    transition: width var(--transition-slow);
}

.service-card:hover::after {
    width: 100%;
}

.service-card:hover {
    border-color: var(--color-border-accent);
    background: var(--color-bg-elevated);
    transform: translateY(-4px);
}

.service-card-number {
    position: absolute;
    top: var(--space-6);
    right: var(--space-6);
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--color-text-muted);
    font-weight: 600;
}

/* ============================================
   App Matrix
   ============================================ */
.app-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    padding: var(--space-6);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.app-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(227, 25, 55, 0.05), transparent);
    transition: left var(--transition-slow);
}

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

.app-card:hover {
    border-color: var(--color-border-accent);
    transform: translateY(-2px);
}

.app-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(227, 25, 55, 0.1), rgba(227, 25, 55, 0.02));
    border: 1px solid var(--color-border-accent);
    border-radius: 12px;
    color: var(--color-accent);
    margin-bottom: var(--space-4);
    transition: all var(--transition-base);
}

.app-card:hover .app-icon {
    transform: scale(1.08);
    box-shadow: 0 0 20px var(--color-accent-glow);
}

.app-icon svg {
    width: 28px;
    height: 28px;
}

.app-name {
    font-size: 1.0625rem;
    font-weight: 700;
    margin-bottom: var(--space-2);
}

.app-desc {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin-bottom: 0;
}

.app-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    margin-top: var(--space-4);
}

.app-tag {
    font-size: 0.6875rem;
    padding: 2px 8px;
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: 100px;
    color: var(--color-text-tertiary);
    font-family: var(--font-mono);
    letter-spacing: 0.05em;
}

/* ============================================
   Footer
   ============================================ */
.site-footer {
    background: var(--color-bg-secondary);
    border-top: 1px solid var(--color-border);
    padding: var(--space-16) 0 var(--space-8);
    position: relative;
    overflow: hidden;
}

.site-footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
    gap: var(--space-8);
    margin-bottom: var(--space-12);
}

@media (max-width: 1024px) {
    .footer-grid {
        grid-template-columns: 1fr 1fr 1fr;
    }
    .footer-brand {
        grid-column: 1 / -1;
    }
}

@media (max-width: 640px) {
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

.footer-brand {
    max-width: 360px;
}

.footer-brand img {
    height: 40px;
    margin-bottom: var(--space-4);
}

.footer-brand p {
    color: var(--color-text-secondary);
    font-size: 0.875rem;
    line-height: 1.7;
    margin-bottom: var(--space-5);
}

.footer-social {
    display: flex;
    gap: var(--space-3);
}

.social-link {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    color: var(--color-text-secondary);
    transition: all var(--transition-base);
}

.social-link:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
    transform: translateY(-2px);
}

.social-link svg {
    width: 18px;
    height: 18px;
}

.footer-col h4 {
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--color-text-primary);
    margin-bottom: var(--space-5);
    font-weight: 600;
}

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

.footer-col a {
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
    transition: all var(--transition-base);
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
}

.footer-col a:hover {
    color: var(--color-accent);
    transform: translateX(3px);
}

.footer-bottom {
    padding-top: var(--space-8);
    border-top: 1px solid var(--color-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-4);
}

.footer-copyright {
    font-size: 0.875rem;
    color: var(--color-text-tertiary);
}

.footer-legal {
    display: flex;
    gap: var(--space-6);
    flex-wrap: wrap;
}

.footer-legal a {
    font-size: 0.8125rem;
    color: var(--color-text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    transition: color var(--transition-base);
}

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

/* ============================================
   Page Header (sub-pages)
   ============================================ */
.page-header {
    padding-top: calc(var(--header-height) + var(--space-16));
    padding-bottom: var(--space-16);
    position: relative;
    overflow: hidden;
    background: var(--color-bg-secondary);
    border-bottom: 1px solid var(--color-border);
}

.page-header::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 50% 100%, rgba(227, 25, 55, 0.08) 0%, transparent 60%);
    z-index: 0;
}

.page-header-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.breadcrumb {
    display: flex;
    justify-content: center;
    gap: var(--space-2);
    font-size: 0.8125rem;
    color: var(--color-text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--space-5);
}

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

.breadcrumb-separator {
    color: var(--color-text-muted);
}

.page-title {
    margin-bottom: var(--space-5);
    font-weight: 800;
    letter-spacing: -0.03em;
}

.page-description {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
    max-width: 700px;
    margin: 0 auto;
}

/* ============================================
   Utility Classes
   ============================================ */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.text-accent { color: var(--color-accent); }
.text-secondary { color: var(--color-text-secondary); }
.text-tertiary { color: var(--color-text-tertiary); }
.text-muted { color: var(--color-text-muted); }

.font-mono { font-family: var(--font-mono); }
.font-bold { font-weight: 700; }
.font-semibold { font-weight: 600; }
.font-medium { font-weight: 500; }

.mt-0 { margin-top: 0; }
.mt-2 { margin-top: var(--space-2); }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }

.mb-0 { margin-bottom: 0; }
.mb-2 { margin-bottom: var(--space-2); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: var(--space-2); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }
.gap-8 { gap: var(--space-8); }

.hidden { display: none; }
.relative { position: relative; }
.absolute { position: absolute; }
.w-full { width: 100%; }

/* ============================================
   Reduced Motion
   ============================================ */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}