/* ========================================
   贰般科技 - 玻璃拟态企业官网样式
   ======================================== */

/* CSS Variables - Design System */
:root {
    /* Glass Effect */
    --blur-amount: 15px;
    --glass-opacity: .14;
    --glass-bg: rgba(255,255,255,.14);
    --glass-bg-strong: rgba(255,255,255,.22);
    --glass-border: rgba(255,255,255,.28);
    
    /* Brand Colors */
    --c-blue: #0080FF;
    --c-purple: #8B00FF;
    --c-pink: #FF1493;
    --c-teal: #20B2AA;
    --c-dark: #170B44;
    
    /* Text Colors */
    --text-color: #FFFFFF;
    --text-secondary: rgba(255,255,255,.7);
    --text-muted: rgba(255,255,255,.5);
    
    /* Spacing */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-2xl: 48px;
    --space-3xl: 64px;
    
    /* Border Radius */
    --radius: 14px;
    --radius-sm: 8px;
    --radius-lg: 20px;
    
    /* Transitions */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Outfit', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-color);
    background: linear-gradient(135deg, #1a0b3e 0%, #0d1b4a 25%, #170B44 50%, #1e3a5f 75%, #0d1b4a 100%);
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
}

/* Animated Background Orbs */
body::before,
body::after {
    content: '';
    position: fixed;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.4;
    z-index: 0;
    animation: float 20s infinite ease-in-out;
}

body::before {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, var(--c-purple) 0%, transparent 70%);
    top: -100px;
    right: -100px;
}

body::after {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, var(--c-blue) 0%, transparent 70%);
    bottom: -50px;
    left: -50px;
    animation-delay: -10s;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(30px, -30px) scale(1.1); }
    66% { transform: translate(-20px, 20px) scale(0.9); }
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
    position: relative;
    z-index: 1;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
}

h1 {
    font-size: clamp(2rem, 5vw, 4rem);
    font-weight: 800;
}

h2 {
    font-size: clamp(1.5rem, 3vw, 2.5rem);
}

h3 {
    font-size: 1.5rem;
}

p {
    max-width: 34em;
}

/* Glass Card */
.glass {
    background: var(--glass-bg);
    backdrop-filter: blur(var(--blur-amount));
    -webkit-backdrop-filter: blur(var(--blur-amount));
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
}

.glass-strong {
    background: var(--glass-bg-strong);
    backdrop-filter: blur(var(--blur-amount));
    -webkit-backdrop-filter: blur(var(--blur-amount));
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
}

/* ========================================
   Navigation
   ======================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: var(--space-md) 0;
    transition: var(--transition);
}

.navbar.scrolled {
    background: var(--glass-bg);
    backdrop-filter: blur(var(--blur-amount));
    -webkit-backdrop-filter: blur(var(--blur-amount));
    border-bottom: 1px solid var(--glass-border);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    text-decoration: none;
    color: var(--text-color);
    font-weight: 700;
    font-size: 1.25rem;
}

.nav-brand svg {
    width: 36px;
    height: 36px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-xl);
    list-style: none;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 15px;
    transition: var(--transition);
    position: relative;
}

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

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--c-blue), var(--c-purple));
    transition: var(--transition);
}

.nav-links a:hover::after,
.nav-links a.active::after {
    width: 100%;
}

.nav-cta {
    padding: var(--space-sm) var(--space-lg);
    background: linear-gradient(135deg, var(--c-blue), var(--c-purple));
    color: var(--text-color);
    border: none;
    border-radius: var(--radius);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}

.nav-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 128, 255, 0.3);
}

/* Mobile Menu */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-sm);
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-color);
    transition: var(--transition);
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: var(--space-3xl) 0;
    position: relative;
}

.hero-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.hero-eyebrow {
    display: inline-block;
    padding: var(--space-xs) var(--space-md);
    background: var(--glass-bg);
    backdrop-filter: blur(var(--blur-amount));
    -webkit-backdrop-filter: blur(var(--blur-amount));
    border: 1px solid var(--glass-border);
    border-radius: 100px;
    font-size: 13px;
    font-weight: 500;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--c-teal);
    margin-bottom: var(--space-lg);
}

.hero-title {
    margin-bottom: var(--space-lg);
    background: linear-gradient(135deg, #fff 0%, rgba(255,255,255,.8) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-buttons {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* ========================================
   Buttons
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl);
    border-radius: var(--radius);
    font-weight: 600;
    font-size: 16px;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    min-height: 44px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--c-blue), var(--c-purple));
    color: var(--text-color);
    box-shadow: 0 4px 16px rgba(0, 128, 255, 0.2);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 128, 255, 0.4);
}

.btn-secondary {
    background: var(--glass-bg);
    backdrop-filter: blur(var(--blur-amount));
    -webkit-backdrop-filter: blur(var(--blur-amount));
    border: 1px solid var(--glass-border);
    color: var(--text-color);
}

.btn-secondary:hover {
    background: var(--glass-bg-strong);
    transform: translateY(-2px);
}

.btn-ghost {
    background: transparent;
    color: var(--text-color);
    padding: var(--space-sm) var(--space-md);
}

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

/* ========================================
   Section Styles
   ======================================== */
.section {
    padding: var(--space-3xl) 0;
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-2xl);
}

.section-eyebrow {
    display: inline-block;
    padding: var(--space-xs) var(--space-md);
    background: var(--glass-bg);
    backdrop-filter: blur(var(--blur-amount));
    -webkit-backdrop-filter: blur(var(--blur-amount));
    border: 1px solid var(--glass-border);
    border-radius: 100px;
    font-size: 13px;
    font-weight: 500;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--c-teal);
    margin-bottom: var(--space-md);
}

.section-title {
    margin-bottom: var(--space-md);
}

.section-subtitle {
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* ========================================
   Feature Cards
   ======================================== */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-lg);
}

.feature-card {
    padding: var(--space-xl);
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-4px);
    background: var(--glass-bg-strong);
}

.feature-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--c-blue), var(--c-purple));
    border-radius: var(--radius);
    margin-bottom: var(--space-md);
}

.feature-icon svg {
    width: 28px;
    height: 28px;
    stroke: white;
}

.feature-card h3 {
    margin-bottom: var(--space-sm);
    font-size: 18px;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 15px;
}

/* ========================================
   About Section
   ======================================== */
.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2xl);
    align-items: center;
}

.about-text h2 {
    margin-bottom: var(--space-lg);
}

.about-text p {
    color: var(--text-secondary);
    margin-bottom: var(--space-md);
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
    margin-top: var(--space-xl);
}

.stat-item {
    padding: var(--space-lg);
    text-align: center;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--c-blue), var(--c-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    color: var(--text-secondary);
    font-size: 14px;
    margin-top: var(--space-xs);
}

.about-visual {
    position: relative;
    height: 400px;
}

.about-visual-inner {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--c-blue), var(--c-purple));
    border-radius: var(--radius-lg);
    opacity: 0.2;
}

.about-visual-pattern {
    position: absolute;
    inset: var(--space-lg);
    background: 
        radial-gradient(circle at 20% 30%, var(--c-pink) 0%, transparent 40%),
        radial-gradient(circle at 80% 70%, var(--c-teal) 0%, transparent 40%),
        radial-gradient(circle at 50% 50%, var(--c-blue) 0%, transparent 60%);
    border-radius: var(--radius);
    opacity: 0.6;
}

/* ========================================
   Products/Services
   ======================================== */
.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-lg);
}

.product-card {
    padding: var(--space-xl);
    transition: var(--transition);
    cursor: pointer;
}

.product-card:hover {
    transform: translateY(-4px);
    background: var(--glass-bg-strong);
}

.product-image {
    width: 100%;
    height: 180px;
    background: linear-gradient(135deg, var(--c-blue), var(--c-purple));
    border-radius: var(--radius);
    margin-bottom: var(--space-md);
    display: flex;
    align-items: center;
    justify-content: center;
}

.product-image svg {
    width: 64px;
    height: 64px;
    stroke: white;
    opacity: 0.8;
}

.product-card h3 {
    margin-bottom: var(--space-sm);
}

.product-card p {
    color: var(--text-secondary);
    font-size: 15px;
    margin-bottom: var(--space-md);
}

.product-link {
    color: var(--c-blue);
    text-decoration: none;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    transition: var(--transition);
}

.product-link:hover {
    gap: var(--space-sm);
}

/* ========================================
   Team Section
   ======================================== */
.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-lg);
}

.team-card {
    padding: var(--space-xl);
    text-align: center;
    transition: var(--transition);
}

.team-card:hover {
    transform: translateY(-4px);
    background: var(--glass-bg-strong);
}

.team-avatar {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    margin: 0 auto var(--space-md);
    background: linear-gradient(135deg, var(--c-blue), var(--c-purple));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    font-weight: 700;
    color: white;
}

.team-card h3 {
    margin-bottom: var(--space-xs);
}

.team-role {
    color: var(--c-teal);
    font-size: 14px;
    font-weight: 500;
    margin-bottom: var(--space-sm);
}

.team-bio {
    color: var(--text-secondary);
    font-size: 14px;
}

/* ========================================
   Chips/Tags
   ======================================== */
.chips {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    justify-content: center;
    margin-bottom: var(--space-xl);
}

.chip {
    padding: var(--space-xs) var(--space-md);
    background: var(--glass-bg);
    backdrop-filter: blur(var(--blur-amount));
    -webkit-backdrop-filter: blur(var(--blur-amount));
    border: 1px solid var(--glass-border);
    border-radius: 100px;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
}

.chip.active {
    background: linear-gradient(135deg, var(--c-blue), var(--c-purple));
    color: var(--text-color);
    border-color: transparent;
}

/* ========================================
   Footer
   ======================================== */
.footer {
    background: rgba(0,0,0,0.2);
    backdrop-filter: blur(var(--blur-amount));
    -webkit-backdrop-filter: blur(var(--blur-amount));
    border-top: 1px solid var(--glass-border);
    padding: var(--space-2xl) 0 var(--space-lg);
    margin-top: var(--space-3xl);
}

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

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.footer-brand .nav-brand {
    margin-bottom: var(--space-sm);
}

.footer-brand p {
    color: var(--text-secondary);
    font-size: 14px;
    max-width: 300px;
}

.footer-column h4 {
    font-size: 14px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: var(--space-md);
    color: var(--text-color);
}

.footer-column ul {
    list-style: none;
}

.footer-column li {
    margin-bottom: var(--space-sm);
}

.footer-column a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    transition: var(--transition);
}

.footer-column a:hover {
    color: var(--text-color);
}

.footer-bottom {
    padding-top: var(--space-lg);
    border-top: 1px solid var(--glass-border);
    text-align: center;
    color: var(--text-muted);
    font-size: 14px;
}

/* ========================================
   Page Header (for inner pages)
   ======================================== */
.page-header {
    padding: calc(var(--space-3xl) * 2) 0 var(--space-2xl);
    text-align: center;
}

.page-header h1 {
    margin-bottom: var(--space-md);
}

.page-header p {
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* ========================================
   Responsive
   ======================================== */
@media (max-width: 992px) {
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .about-visual {
        height: 300px;
    }
    
    .footer-content {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        padding: var(--space-lg);
        background: var(--glass-bg-strong);
        backdrop-filter: blur(var(--blur-amount));
        -webkit-backdrop-filter: blur(var(--blur-amount));
        border-bottom: 1px solid var(--glass-border);
    }
    
    .nav-links.active {
        display: flex;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .nav-cta {
        display: none;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .features-grid,
    .products-grid,
    .team-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-brand {
        align-items: center;
    }
    
    .footer-brand p {
        max-width: 100%;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--space-md);
    }
    
    .about-stats {
        grid-template-columns: 1fr;
    }
}

/* ========================================
   Animations
   ======================================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.6s ease-out forwards;
}

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

/* Focus Visible */
*:focus-visible {
    outline: 2px solid var(--c-blue);
    outline-offset: 2px;
}