/* ============================================
   AFASTS 企业官网 - 主样式文件（重写）
   ============================================ */

:root {
    --color-bg: #050505;
    --color-bg-deep: #000000;
    --color-text-primary: #FFFFFF;
    --color-text-secondary: #CFCFCF;
    --color-text-tertiary: #9A9A9A;

    --color-blue: #00D1FF;
    --color-green: #16DB93;
    --color-gold: #D8B15A;

    --font-primary: -apple-system, BlinkMacSystemFont, 'SF Pro Display', sans-serif;
    --font-mono: 'SF Mono', 'Roboto Mono', monospace;

    --font-xxl: 4rem;
    --font-xl: 2.5rem;
    --font-lg: 1.5rem;
    --font-md: 1rem;
    --font-sm: 0.875rem;
    --font-xs: 0.75rem;

    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-xxl: 48px;

    --radius-btn: 8px;
    --radius-card: 12px;

    --afasts-size-desktop: clamp(7rem, 16vw, 18rem);
    --afasts-size-tablet: clamp(6rem, 18vw, 13rem);
    --afasts-size-mobile: clamp(4rem, 20vw, 8rem);
    --subtitle-size-desktop: 72px;
    --subtitle-size-tablet: 56px;
    --subtitle-size-mobile: 40px;

    --ease-brand: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-out: cubic-bezier(0.4, 0, 0.2, 1);

    --starfield-offset-slow: 0px;
    --starfield-offset-fast: 0px;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    font-size: var(--font-md);
    line-height: 1.6;
    color: var(--color-text-primary);
    background: radial-gradient(1200px circle at 20% 10%, rgba(0, 209, 255, 0.08), transparent 60%),
                radial-gradient(900px circle at 80% 20%, rgba(22, 219, 147, 0.06), transparent 55%),
                linear-gradient(180deg, #040404 0%, #000000 100%);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    position: relative;
}

.error-boundary {
    position: fixed;
    inset: 0;
    background: var(--color-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

.error-boundary.hidden {
    display: none;
}

.error-content {
    text-align: center;
    padding: var(--space-xxl);
}

.error-content h2 {
    margin-bottom: var(--space-md);
}

.error-content p {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-lg);
}

.starfield {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 0;
    opacity: 0.45;
}

.starfield::before,
.starfield::after {
    content: '';
    position: absolute;
    inset: 0;
    background-repeat: repeat;
}

.starfield::before {
    background-image:
        radial-gradient(circle, rgba(255, 255, 255, 0.25) 1px, transparent 1.5px),
        radial-gradient(circle, rgba(216, 177, 90, 0.18) 1px, transparent 1.5px);
    background-size: 120px 120px, 240px 240px;
    transform: translateY(var(--starfield-offset-slow));
}

.starfield::after {
    background-image:
        radial-gradient(circle, rgba(255, 255, 255, 0.18) 1px, transparent 2px),
        radial-gradient(circle, rgba(0, 209, 255, 0.12) 1px, transparent 2px);
    background-size: 200px 200px, 320px 320px;
    transform: translateY(var(--starfield-offset-fast));
}

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(0, 0, 0, 0.75);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--space-md) var(--space-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-lg);
}

.nav-brand a {
    font-size: var(--font-lg);
    font-weight: 600;
    letter-spacing: 0.3em;
    text-decoration: none;
    color: var(--color-text-primary);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--space-lg);
}

.nav-menu a {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: var(--font-sm);
    text-transform: uppercase;
    letter-spacing: 1px;
    position: relative;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-blue);
    transition: width 0.3s var(--ease-brand);
}

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

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

.lang-select {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--color-text-secondary);
    font-size: var(--font-xs);
    text-transform: uppercase;
    letter-spacing: 1px;
    position: relative;
}

.lang-label {
    font-size: var(--font-xs);
    color: var(--color-text-secondary);
}

.lang-toggle {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    height: 36px;
    padding: 0 18px;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.08), rgba(0, 0, 0, 0.55));
    color: #E6E6E6;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 999px;
    font-size: var(--font-xs);
    letter-spacing: 1px;
    text-transform: uppercase;
    cursor: pointer;
    backdrop-filter: blur(12px);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08),
                0 10px 24px rgba(0, 0, 0, 0.5);
    transition: border-color 0.3s var(--ease-out), color 0.3s var(--ease-out), background 0.3s var(--ease-out), box-shadow 0.3s var(--ease-out);
}

.lang-caret {
    width: 6px;
    height: 6px;
    border-right: 1px solid rgba(255, 255, 255, 0.8);
    border-bottom: 1px solid rgba(255, 255, 255, 0.8);
    transform: rotate(45deg) translateY(-2px);
}

.lang-list {
    position: absolute;
    top: calc(100% + 10px);
    right: 0;
    min-width: 140px;
    background: rgba(6, 6, 6, 0.94);
    background-image: linear-gradient(180deg, rgba(255, 255, 255, 0.04), rgba(0, 0, 0, 0.2));
    border: 1px solid rgba(255, 255, 255, 0.14);
    border-radius: 14px;
    padding: 8px;
    list-style: none;
    opacity: 0;
    pointer-events: none;
    transform: translateY(-6px);
    transition: opacity 0.2s var(--ease-out), transform 0.2s var(--ease-out);
    z-index: 10;
    backdrop-filter: blur(12px);
    box-shadow: 0 18px 40px rgba(0, 0, 0, 0.6);
}

.lang-list li {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 9px 14px;
    color: var(--color-text-secondary);
    font-size: var(--font-xs);
    text-transform: uppercase;
    letter-spacing: 1px;
    cursor: pointer;
    border-radius: 999px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    transition: background 0.2s var(--ease-out), color 0.2s var(--ease-out);
}

.lang-list li[aria-selected="true"] {
    color: var(--color-text-primary);
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.18);
}

.lang-list li:hover,
.lang-list li:focus {
    background: linear-gradient(90deg, rgba(0, 209, 255, 0.14), rgba(22, 219, 147, 0.1));
    color: var(--color-text-primary);
    border-color: rgba(0, 209, 255, 0.35);
}

.lang-list li[aria-selected=\"true\"]::after {
    content: '•';
    color: var(--color-gold);
    font-size: 12px;
}

.lang-select.open .lang-list {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
}

.lang-select:hover .lang-toggle,
.lang-select:focus-within .lang-toggle {
    color: var(--color-text-primary);
    border-color: rgba(255, 255, 255, 0.45);
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.12), rgba(0, 0, 0, 0.6));
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.12),
                0 12px 28px rgba(0, 0, 0, 0.55);
}

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

.param-indicator {
    position: relative;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.param-indicator .param-ring {
    position: absolute;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    border: 2px solid transparent;
    transition: transform 0.5s var(--ease-out);
}

.param-indicator[data-param="flux"] .param-ring {
    border-top-color: #5EC8FF;
    border-right-color: #2C6BFF;
}

.param-indicator[data-param="entropy"] .param-ring {
    border-top-color: #39E6C2;
    border-right-color: #08B6A7;
}

.param-indicator[data-param="sync"] .param-ring {
    border-top-color: var(--color-gold);
    border-right-color: #FF9500;
}

.param-value {
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--color-text-primary);
}

.home-anchor {
    position: absolute;
    top: 0;
    left: 0;
    width: 1px;
    height: 1px;
}

.carousel-container {
    position: relative;
    width: 100%;
    height: 100vh;
    overflow: hidden;
    z-index: 1;
}

.carousel-controls {
    position: absolute;
    right: var(--space-lg);
    bottom: var(--space-lg);
    display: flex;
    gap: var(--space-sm);
    z-index: 2;
}

.carousel-btn {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: 1px solid rgba(255, 255, 255, 0.2);
    background: rgba(0, 0, 0, 0.5);
    color: var(--color-text-primary);
    font-size: 24px;
    line-height: 1;
    cursor: pointer;
    transition: border-color 0.3s var(--ease-out), background 0.3s var(--ease-out);
}

.carousel-btn:hover,
.carousel-btn:focus {
    border-color: var(--color-blue);
    background: rgba(0, 0, 0, 0.7);
}

.carousel-screen {
    position: absolute;
    inset: 0;
    opacity: 0;
    visibility: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.9s var(--ease-brand), visibility 0.9s var(--ease-brand);
    background: radial-gradient(900px circle at 50% 35%, rgba(255, 255, 255, 0.05), transparent 60%),
                linear-gradient(180deg, #060606 0%, #000000 100%);
}

.carousel-screen.active {
    opacity: 1;
    visibility: visible;
}

.particles-background {
    position: absolute;
    inset: 0;
    pointer-events: none;
    opacity: 0.18;
    background-image:
        radial-gradient(circle, rgba(255,255,255,0.08) 1px, transparent 1px),
        radial-gradient(circle, rgba(255,255,255,0.06) 1px, transparent 1px);
    background-size: 140px 140px, 220px 220px;
    animation: particleFlow 30s linear infinite;
}

.screen-content {
    text-align: center;
    padding: var(--space-xl);
    position: relative;
    z-index: 1;
}

.afasts-title {
    font-size: var(--afasts-size-desktop);
    font-weight: 900;
    letter-spacing: 0.15em;
    margin-bottom: var(--space-md);
}

.afasts-title .letter {
    display: inline-block;
    color: rgba(255, 255, 255, 0.25);
    transition: color 0.4s var(--ease-out), text-shadow 0.4s var(--ease-out);
}

.afasts-title .letter.highlight {
    color: var(--highlight-color, #ffffff);
    text-shadow: 0 0 16px rgba(255, 255, 255, 0.25);
}

.afasts-title .letter.highlight.gradient {
    background: var(--highlight-gradient);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    text-shadow: none;
}

.subtitle {
    font-size: var(--subtitle-size-desktop);
    font-weight: 600;
    letter-spacing: 0.08em;
    margin-bottom: var(--space-lg);
}

.tagline {
    font-size: var(--font-lg);
    color: var(--color-text-secondary);
    max-width: 820px;
    margin: 0 auto;
}

.skip-link {
    position: fixed;
    top: -100%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-bg);
    color: var(--color-text-primary);
    padding: var(--space-sm) var(--space-lg);
    border-radius: 0 0 var(--radius-card) var(--radius-card);
    text-decoration: none;
    z-index: 10000;
    transition: top 0.3s var(--ease-out);
}

.skip-link:focus {
    top: 0;
    outline: 2px solid var(--color-blue);
}

.content-section {
    position: relative;
    z-index: 10;
    background: rgba(0, 0, 0, 0.92);
}

.section-title {
    font-size: var(--font-xl);
    color: var(--color-text-primary);
    text-align: center;
    margin-bottom: var(--space-xxl);
    letter-spacing: 0.16em;
}

.products-section {
    padding: var(--space-xxl) var(--space-lg);
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
    max-width: 1200px;
    margin: 0 auto;
}

.product-card {
    background: rgba(5, 5, 5, 0.95);
    border-radius: var(--radius-card);
    padding: var(--space-xl);
    position: relative;
    overflow: hidden;
    transition: transform 0.3s var(--ease-out), box-shadow 0.3s var(--ease-out);
    scroll-margin-top: 120px;
}

.product-card::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    opacity: 0;
    box-shadow: 0 0 0 1px var(--card-glow, rgba(255, 255, 255, 0.2)),
                0 0 24px var(--card-glow, rgba(255, 255, 255, 0.2));
    transition: opacity 0.3s var(--ease-out);
    pointer-events: none;
}

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

.product-card:hover,
.product-card:focus-within {
    transform: translateY(-6px);
    box-shadow: 0 18px 36px rgba(0, 0, 0, 0.55);
}

.product-card[data-keyword="agent"] { --card-glow: rgba(0, 209, 255, 0.6); }
.product-card[data-keyword="asset"] { --card-glow: rgba(6, 214, 160, 0.6); }
.product-card[data-keyword="agency"] { --card-glow: rgba(58, 134, 255, 0.6); }
.product-card[data-keyword="function"] { --card-glow: rgba(72, 149, 239, 0.6); }
.product-card[data-keyword="skill"] { --card-glow: rgba(73, 182, 210, 0.6); }
.product-card[data-keyword="script"] { --card-glow: rgba(22, 219, 147, 0.6); }

.product-icon {
    width: 60px;
    height: 60px;
    margin-bottom: var(--space-md);
    color: var(--card-glow, var(--color-text-primary));
}

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

.product-card p {
    font-size: var(--font-sm);
    color: var(--color-text-secondary);
}

.feature-list {
    list-style: none;
    margin-top: var(--space-md);
    display: grid;
    gap: var(--space-xs);
    font-size: var(--font-xs);
    color: var(--color-text-tertiary);
}

.feature-list li::before {
    content: '•';
    color: var(--color-gold);
    margin-right: var(--space-xs);
}

.icon-wall {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 6px;
    margin-top: var(--space-md);
}

.icon-cell {
    position: relative;
    width: 100%;
    padding-top: 100%;
    border-radius: 6px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
    overflow: hidden;
}

.icon-cell::after {
    content: '';
    position: absolute;
    inset: 4px;
    border-radius: 4px;
    background: linear-gradient(135deg, rgba(0, 209, 255, 0.12), rgba(22, 219, 147, 0.08));
}

.tech-section {
    padding: var(--space-xxl) var(--space-lg) calc(var(--space-xxl) * 1.2);
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
    max-width: 1200px;
    margin: 0 auto;
}

.tech-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-card);
    padding: var(--space-xl);
}

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

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

.metric-chart,
.compare-chart {
    display: grid;
    gap: var(--space-sm);
}

.metric-row,
.compare-item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.metric-label,
.compare-label {
    width: 72px;
    font-size: var(--font-xs);
    color: var(--color-text-tertiary);
}

.metric-bar,
.compare-bar {
    flex: 1;
    height: 8px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 999px;
    overflow: hidden;
}

.metric-bar span {
    display: block;
    height: 100%;
    border-radius: inherit;
    background: linear-gradient(90deg, var(--color-blue), var(--color-green));
}

.metric-value {
    font-size: var(--font-xs);
    color: var(--color-gold);
    min-width: 44px;
    text-align: right;
}

.compare-bar.legacy span {
    display: block;
    height: 100%;
    border-radius: inherit;
    background: linear-gradient(90deg, rgba(255, 255, 255, 0.2), rgba(255, 255, 255, 0.5));
}

.compare-bar.modern span {
    display: block;
    height: 100%;
    border-radius: inherit;
    background: linear-gradient(90deg, var(--color-blue), var(--color-gold));
}

.code-sample {
    background: rgba(0, 0, 0, 0.7);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-card);
    padding: var(--space-md);
    font-family: var(--font-mono);
    font-size: var(--font-xs);
    color: var(--color-text-secondary);
    line-height: 1.6;
    overflow: auto;
}

.footer {
    background: rgba(2, 2, 2, 0.95);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: var(--space-xxl) var(--space-lg) var(--space-lg);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xl);
}

.footer-col {
    padding-right: var(--space-lg);
    border-right: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-col:last-child {
    border-right: none;
    padding-right: 0;
}

.footer-col h4 {
    font-size: var(--font-sm);
    text-transform: uppercase;
    letter-spacing: 0.18em;
    margin-bottom: var(--space-md);
}

.footer-col p {
    font-size: var(--font-xs);
    color: var(--color-text-tertiary);
    margin-bottom: var(--space-xs);
}

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

.footer-links a {
    color: var(--color-text-tertiary);
    text-decoration: none;
    font-size: var(--font-xs);
}

.footer-link-btn {
    background: transparent;
    border: none;
    color: var(--color-text-tertiary);
    font-size: var(--font-xs);
    text-align: left;
    cursor: pointer;
    padding: 0;
}

.footer-record {
    font-size: var(--font-xs);
    color: var(--color-text-tertiary);
}

.partner-logos,
.cert-badges {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    margin-bottom: var(--space-md);
}

.partner-badge,
.cert-badge {
    font-size: var(--font-xs);
    color: var(--color-text-secondary);
    padding: 4px 10px;
    border-radius: 999px;
    border: 1px solid rgba(255, 255, 255, 0.12);
    background: rgba(255, 255, 255, 0.04);
    cursor: pointer;
}

.social-icons {
    display: flex;
    gap: var(--space-md);
    align-items: center;
}

.social-icons a,
.social-btn {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 1px solid rgba(255, 255, 255, 0.12);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-secondary);
    background: rgba(255, 255, 255, 0.04);
    cursor: pointer;
    padding: 0;
}

.social-icons svg {
    width: 18px;
    height: 18px;
    fill: currentColor;
}

.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.65);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    opacity: 1;
    transition: opacity 0.2s var(--ease-out);
}

.modal-overlay.hidden {
    opacity: 0;
    pointer-events: none;
}

.modal-content {
    width: min(420px, 90vw);
    background: rgba(6, 6, 6, 0.96);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 16px;
    padding: 24px;
    text-align: center;
    box-shadow: 0 24px 60px rgba(0, 0, 0, 0.6);
}

.modal-content h3 {
    margin-bottom: var(--space-sm);
    font-size: var(--font-lg);
}

.modal-content p {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-lg);
}

.btn-primary {
    padding: var(--space-sm) var(--space-lg);
    background: var(--color-blue);
    color: var(--color-text-primary);
    border: none;
    border-radius: var(--radius-btn);
    cursor: pointer;
}

:focus-visible {
    outline: 2px solid var(--color-blue);
    outline-offset: 2px;
}

@media (max-width: 1023px) {
    :root {
        --font-xxl: 3rem;
        --font-xl: 2rem;
        --afasts-size-desktop: var(--afasts-size-tablet);
        --subtitle-size-desktop: var(--subtitle-size-tablet);
    }

    .nav-menu {
        gap: var(--space-md);
    }

    .lang-select {
        margin-left: auto;
    }

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

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

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

@media (max-width: 767px) {
    :root {
        --font-xxl: 2.5rem;
        --font-xl: 1.5rem;
        --font-lg: 1.25rem;
        --afasts-size-desktop: var(--afasts-size-mobile);
        --subtitle-size-desktop: var(--subtitle-size-mobile);
    }

    .nav-container {
        flex-wrap: wrap;
    }

    .nav-menu {
        order: 3;
        width: 100%;
        overflow-x: auto;
        padding-bottom: var(--space-sm);
    }

    .lang-select {
        order: 2;
        margin-left: 0;
    }

    .nav-status {
        display: none;
    }

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

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

    .footer-col {
        padding-right: 0;
        border-right: none;
        border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        padding-bottom: var(--space-md);
    }

    .footer-col:last-child {
        border-bottom: none;
        padding-bottom: 0;
    }

    .footer-links {
        align-items: center;
    }

    .partner-logos,
    .cert-badges,
    .social-icons {
        justify-content: center;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}