/* ================================
   Components
   ================================ */

/* ===== Navigation ===== */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-fixed);
    padding: var(--space-sm) 0;
    background: rgba(10, 10, 15, 0.8);
    backdrop-filter: blur(var(--blur-md));
    -webkit-backdrop-filter: blur(var(--blur-md));
    border-bottom: 1px solid var(--border-subtle);
    transition: all var(--duration-base) var(--ease-out);
}

.navbar.scrolled {
    padding: var(--space-xs) 0;
    background: rgba(10, 10, 15, 0.95);
}

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

.nav-logo {
    font-size: 1.5rem;
    font-weight: var(--weight-bold);
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    gap: var(--space-lg);
}

.nav-link {
    position: relative;
    font-size: var(--font-small);
    font-weight: var(--weight-medium);
    color: var(--text-secondary);
    padding: var(--space-xs) 0;
    transition: color var(--duration-base) var(--ease-out);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    transition: width var(--duration-base) var(--ease-out);
}

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

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

/* Mobile Menu Toggle */
.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 30px;
    height: 30px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
}

.nav-toggle span {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--text-primary);
    transition: all var(--duration-base) var(--ease-out);
}

.nav-toggle.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ===== Hero Section ===== */

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: var(--bg-primary);
}

/* Hero 背景装饰 - 光环效果 */
.hero::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 800px;
    height: 800px;
    transform: translate(-50%, -50%);
    background: radial-gradient(
        circle,
        rgba(0, 212, 255, 0.15) 0%,
        rgba(124, 58, 237, 0.1) 30%,
        transparent 70%
    );
    border-radius: 50%;
    filter: blur(60px);
    z-index: 0;
    animation: pulse 8s ease-in-out infinite;
}

/* Hero 背景装饰 - 光线效果 */
.hero::after {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    width: 2px;
    height: 30%;
    background: linear-gradient(
        to bottom,
        transparent,
        var(--primary-glow),
        transparent
    );
    transform: translateX(-50%);
    opacity: 0.5;
    z-index: 0;
}

#particles-js {
    position: absolute;
    inset: 0;
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    padding: var(--space-xl);
    max-width: 900px;
}

.hero-title {
    font-size: var(--font-hero);
    font-weight: var(--weight-extrabold);
    line-height: var(--leading-tight);
    letter-spacing: -0.02em;
    margin-bottom: var(--space-md);
}

.hero-title .text-gradient {
    display: inline;
}

.hero-subtitle {
    font-size: var(--font-h3);
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto var(--space-xl);
    line-height: var(--leading-relaxed);
}

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

/* ===== Buttons ===== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-xs);
    padding: var(--space-sm) var(--space-lg);
    font-size: var(--font-body);
    font-weight: var(--weight-semibold);
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: all var(--duration-base) var(--ease-out);
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: var(--bg-primary);
    box-shadow: 0 4px 20px var(--primary-glow);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px var(--primary-glow);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-light);
}

.btn-secondary:hover {
    background: var(--bg-card);
    border-color: var(--primary);
}

/* ===== Section Titles ===== */

.section-header {
    text-align: center;
    margin-bottom: var(--space-3xl);
}

.section-title {
    font-size: var(--font-h2);
    font-weight: var(--weight-bold);
    margin-bottom: var(--space-sm);
}

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

/* ===== Service Cards - Bento Grid ===== */

.services-section {
    background: var(--bg-secondary);
}

.bento-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: repeat(2, auto);
    gap: var(--space-md);
}

.service-card {
    position: relative;
    padding: var(--space-xl);
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(var(--blur-sm));
    -webkit-backdrop-filter: blur(var(--blur-sm));
    overflow: hidden;
    transition: all var(--duration-base) var(--ease-out);
}

/* Bento grid sizing */
.service-card.large {
    grid-column: span 2;
}

.service-card.tall {
    grid-row: span 2;
}

/* Featured card - 核心服务突出显示 */
.service-card.featured {
    grid-column: span 2;
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.05), rgba(124, 58, 237, 0.05));
}

.service-card.featured .service-icon {
    width: 64px;
    height: 64px;
    font-size: 2rem;
}

.service-card.featured h3 {
    font-size: calc(var(--font-h3) * 1.1);
}

/* Card hover effects */
.service-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-glow);
    transform: translateY(-4px);
}

/* Gradient border on hover */
.service-card::before {
    content: '';
    position: absolute;
    inset: 0;
    padding: 1px;
    border-radius: inherit;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -webkit-mask:
        linear-gradient(#fff 0 0) content-box,
        linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    opacity: 0;
    transition: opacity var(--duration-base) var(--ease-out);
    pointer-events: none;
}

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

.service-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border-radius: var(--radius-md);
    margin-bottom: var(--space-md);
}

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

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

.service-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
    margin-top: var(--space-md);
}

.service-tag {
    font-size: var(--font-xs);
    padding: 4px 12px;
    background: rgba(0, 212, 255, 0.1);
    color: var(--primary);
    border-radius: var(--radius-full);
    border: 1px solid rgba(0, 212, 255, 0.2);
}

/* ===== Cases Section ===== */

.cases-section {
    background: var(--bg-primary);
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-md);
}

.case-card {
    position: relative;
    padding: var(--space-xl);
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    transition: all var(--duration-base) var(--ease-out);
}

.case-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-glow);
    transform: translateY(-4px);
}

.case-industry {
    display: inline-block;
    font-size: var(--font-xs);
    font-weight: var(--weight-medium);
    padding: 4px 12px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: var(--bg-primary);
    border-radius: var(--radius-full);
    margin-bottom: var(--space-md);
}

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

.case-card p {
    font-size: var(--font-small);
    color: var(--text-muted);
    line-height: var(--leading-relaxed);
    margin-bottom: var(--space-lg);
}

.case-metrics {
    display: flex;
    gap: var(--space-lg);
}

.metric {
    display: flex;
    flex-direction: column;
}

.metric-value {
    font-size: var(--font-h2);
    font-weight: var(--weight-bold);
    background: linear-gradient(135deg, var(--primary), var(--highlight));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.metric-label {
    font-size: var(--font-xs);
    color: var(--text-dim);
}

/* ===== About Section ===== */

.about-section {
    background: var(--bg-primary);
    position: relative;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
    align-items: center;
}

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

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

.about-text p:first-of-type {
    font-size: calc(var(--font-body) * 1.1);
    color: var(--text-primary);
}

.about-visual {
    position: relative;
    height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Decorative code blocks */
.code-float {
    position: absolute;
    padding: var(--space-sm) var(--space-md);
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    font-family: 'Monaco', 'Consolas', monospace;
    font-size: var(--font-xs);
    color: var(--primary);
    animation: float 6s ease-in-out infinite;
}

.code-float:nth-child(1) { top: 10%; left: 10%; animation-delay: 0s; }
.code-float:nth-child(2) { top: 30%; right: 5%; animation-delay: -2s; }
.code-float:nth-child(3) { bottom: 20%; left: 20%; animation-delay: -4s; }

/* ===== Contact Section ===== */

.contact-section {
    background: linear-gradient(180deg, var(--bg-secondary), var(--bg-primary));
    text-align: center;
}

.contact-content {
    max-width: 600px;
    margin: 0 auto;
}

.contact-title {
    font-size: var(--font-h2);
    margin-bottom: var(--space-md);
}

.contact-subtitle {
    color: var(--text-secondary);
    margin-bottom: var(--space-xl);
}

.contact-cta {
    margin-bottom: var(--space-xl);
}

.contact-info {
    display: flex;
    justify-content: center;
    gap: var(--space-2xl);
    flex-wrap: wrap;
}

.contact-item h4 {
    font-size: var(--font-small);
    color: var(--text-muted);
    margin-bottom: var(--space-xs);
    font-weight: var(--weight-medium);
}

.contact-item a,
.contact-item p {
    font-size: var(--font-body);
    color: var(--text-primary);
}

.contact-item a {
    position: relative;
    transition: color var(--duration-base) var(--ease-out);
}

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

.contact-hint {
    font-size: var(--font-small);
    color: var(--text-muted);
}

/* ===== Footer ===== */

.footer {
    padding: var(--space-xl) 0;
    background: var(--bg-primary);
    border-top: 1px solid var(--border-subtle);
    text-align: center;
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
}

.footer-logo {
    font-size: 1.25rem;
    font-weight: var(--weight-bold);
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--space-sm);
}

.footer p {
    font-size: var(--font-small);
    color: var(--text-muted);
}

.footer a {
    color: var(--text-secondary);
    transition: color var(--duration-base);
}

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

/* ===== Responsive ===== */

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

    .service-card.large,
    .service-card.featured {
        grid-column: span 2;
    }

    .about-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .about-visual {
        height: 200px;
    }

    .code-float:nth-child(2),
    .code-float:nth-child(3) {
        display: none;
    }

    .code-float:nth-child(1) {
        position: relative;
        top: auto;
        left: auto;
        animation: float 4s ease-in-out infinite;
    }

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

@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: 60px;
        left: 0;
        right: 0;
        bottom: 0;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: var(--space-xl);
        background: rgba(10, 10, 15, 0.98);
        backdrop-filter: blur(var(--blur-lg));
        -webkit-backdrop-filter: blur(var(--blur-lg));
        opacity: 0;
        visibility: hidden;
        transition: all var(--duration-base) var(--ease-out);
    }

    .nav-menu.active {
        opacity: 1;
        visibility: visible;
    }

    .nav-link {
        font-size: var(--font-h3);
    }

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

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

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

    .case-metrics {
        flex-wrap: wrap;
    }

    .service-card.large,
    .service-card.tall,
    .service-card.featured {
        grid-column: span 1;
        grid-row: span 1;
    }

    .contact-info {
        flex-direction: column;
        gap: var(--space-lg);
    }

    .btn {
        width: 100%;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: clamp(2rem, 10vw, 3rem);
    }

    .service-card {
        padding: var(--space-lg);
    }
}