/* ===================================
   棵源信息科技 - 官网样式
   Dark Theme · Tech · Premium
   =================================== */

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

:root {
    /* Colors */
    --bg-primary: #0a0e1a;
    --bg-secondary: #0d1320;
    --bg-tertiary: #131a2e;
    --bg-card: rgba(20, 27, 45, 0.6);
    --bg-card-hover: rgba(28, 36, 58, 0.8);
    --border-color: rgba(255, 255, 255, 0.08);
    --border-hover: rgba(0, 212, 255, 0.3);
    --text-primary: #e8edf5;
    --text-secondary: #9ba3b4;
    --text-muted: #6b7280;
    --accent-cyan: #00d4ff;
    --accent-purple: #7c3aed;
    --accent-green: #00f0a0;
    --accent-red: #ff6b6b;
    --accent-yellow: #fbbf24;
    --gradient-main: linear-gradient(135deg, #00d4ff 0%, #7c3aed 100%);
    --gradient-text: linear-gradient(135deg, #00d4ff, #7c3aed);
    --gradient-green: linear-gradient(135deg, #00f0a0, #00a86b);
    --gradient-red: linear-gradient(135deg, #ff6b6b, #f59e0b);

    /* Typography */
    --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    --font-mono: "SF Mono", "Fira Code", "Consolas", monospace;

    /* Spacing */
    --section-padding: 120px 0;
    --container-max: 1200px;

    /* Transitions */
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-sans);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, textarea, select { font-family: inherit; }

/* ===== Container ===== */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
}

/* ===== Loader ===== */
.loader {
    position: fixed;
    inset: 0;
    background: var(--bg-primary);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.5s, visibility 0.5s;
}
.loader.hidden { opacity: 0; visibility: hidden; }
.loader-content { text-align: center; }
.loader-logo { margin-bottom: 24px; animation: pulse 1.5s ease-in-out infinite; }
.loader-bar {
    width: 200px;
    height: 3px;
    background: rgba(255,255,255,0.1);
    border-radius: 3px;
    overflow: hidden;
    margin: 0 auto;
}
.loader-bar-fill {
    height: 100%;
    width: 100%;
    background: var(--gradient-main);
    border-radius: 3px;
    animation: loadBar 1.5s ease-in-out infinite;
}
@keyframes loadBar {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}
@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.7; transform: scale(0.95); }
}

/* ===== Navigation ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 20px 0;
    transition: var(--transition);
}
.navbar.scrolled {
    padding: 12px 0;
    background: rgba(10, 14, 26, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
}
.nav-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--text-primary);
    transition: var(--transition);
}
.nav-logo:hover { opacity: 0.85; }
.logo-svg { flex-shrink: 0; }
.logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.1;
}
.logo-sub {
    font-size: 0.65rem;
    font-weight: 400;
    color: var(--text-muted);
    letter-spacing: 2px;
}
.nav-menu {
    display: flex;
    align-items: center;
    gap: 4px;
}
.nav-link {
    padding: 8px 16px;
    font-size: 0.9rem;
    color: var(--text-secondary);
    border-radius: 8px;
    transition: var(--transition);
    position: relative;
}
.nav-link:hover, .nav-link.active {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.05);
}
.nav-cta {
    background: var(--gradient-main);
    color: #fff !important;
    font-weight: 600;
    margin-left: 8px;
}
.nav-cta:hover {
    opacity: 0.9;
    transform: translateY(-1px);
    box-shadow: 0 4px 20px rgba(0, 212, 255, 0.3);
}
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 6px;
}
.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition);
}
.nav-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: 12px;
    transition: var(--transition);
    cursor: pointer;
    white-space: nowrap;
}
.btn-primary {
    background: var(--gradient-main);
    color: #fff;
    box-shadow: 0 4px 24px rgba(0, 212, 255, 0.25);
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 32px rgba(0, 212, 255, 0.4);
}
.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}
.btn-outline:hover {
    border-color: var(--accent-cyan);
    background: rgba(0, 212, 255, 0.05);
    transform: translateY(-2px);
}
.btn-full { width: 100%; justify-content: center; }

/* ===== Glass Effect ===== */
.glass {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    border-radius: 20px;
}

/* ===== Gradient Text ===== */
.gradient-text {
    background: var(--gradient-text);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* ===== Section Base ===== */
.section {
    padding: var(--section-padding);
    position: relative;
}
.section-header {
    text-align: center;
    margin-bottom: 64px;
}
.section-tag {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 3px;
    color: var(--accent-cyan);
    margin-bottom: 16px;
    text-transform: uppercase;
}
.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 16px;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}
.section-desc {
    font-size: 1.05rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* ===== Hero ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    padding: 120px 24px 80px;
}
.particle-canvas {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}
.hero-bg-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
    background-size: 50px 50px;
    z-index: 0;
    mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
}
.hero-glow {
    position: absolute;
    border-radius: 50%;
    filter: blur(120px);
    z-index: 0;
    opacity: 0.4;
}
.hero-glow-1 {
    width: 600px;
    height: 600px;
    background: var(--accent-cyan);
    top: -100px;
    left: -100px;
    animation: floatGlow 8s ease-in-out infinite;
}
.hero-glow-2 {
    width: 500px;
    height: 500px;
    background: var(--accent-purple);
    bottom: -100px;
    right: -100px;
    animation: floatGlow 10s ease-in-out infinite reverse;
}
@keyframes floatGlow {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(50px, 30px) scale(1.1); }
}
.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 900px;
}
.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: 100px;
    font-size: 0.85rem;
    color: var(--accent-cyan);
    margin-bottom: 32px;
}
.badge-dot {
    width: 8px;
    height: 8px;
    background: var(--accent-cyan);
    border-radius: 50%;
    animation: blink 2s ease-in-out infinite;
}
@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}
.hero-title {
    font-size: 4rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 24px;
    letter-spacing: -0.02em;
}
.hero-title .gradient-text {
    display: inline;
}
.hero-desc {
    font-size: 1.15rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 40px;
}
.hero-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    margin-bottom: 64px;
}
.hero-stats {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 32px;
    flex-wrap: wrap;
}
.hero-stat { text-align: center; }
.hero-stat-num {
    font-size: 2.5rem;
    font-weight: 800;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline;
}
.hero-stat-suffix {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--accent-cyan);
}
.hero-stat-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 4px;
}
.hero-stat-divider {
    width: 1px;
    height: 48px;
    background: var(--border-color);
}
.hero-scroll {
    position: absolute;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    z-index: 2;
}
.hero-scroll span {
    font-size: 0.75rem;
    color: var(--text-muted);
    letter-spacing: 2px;
}
.scroll-line {
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, var(--accent-cyan), transparent);
    animation: scrollLine 2s ease-in-out infinite;
}
@keyframes scrollLine {
    0% { transform: scaleY(0); transform-origin: top; }
    50% { transform: scaleY(1); transform-origin: top; }
    51% { transform-origin: bottom; }
    100% { transform: scaleY(0); transform-origin: bottom; }
}

/* ===== Hero Animations ===== */
.animate-up {
    opacity: 0;
    transform: translateY(30px);
    animation: animateUp 0.8s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}
.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.3s; }
.delay-4 { animation-delay: 0.4s; }
@keyframes animateUp {
    to { opacity: 1; transform: translateY(0); }
}

/* ===== Reveal Animation ===== */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1), transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}
.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===== Marquee ===== */
.marquee-section {
    padding: 40px 0;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-secondary);
}
.marquee-label {
    text-align: center;
    font-size: 0.8rem;
    color: var(--text-muted);
    letter-spacing: 3px;
    margin-bottom: 20px;
    text-transform: uppercase;
}
.marquee {
    overflow: hidden;
    position: relative;
    mask-image: linear-gradient(90deg, transparent, black 10%, black 90%, transparent);
    -webkit-mask-image: linear-gradient(90deg, transparent, black 10%, black 90%, transparent);
}
.marquee-track {
    display: flex;
    align-items: center;
    gap: 40px;
    animation: marquee 30s linear infinite;
    white-space: nowrap;
}
@keyframes marquee {
    to { transform: translateX(-50%); }
}
.marquee-item {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-secondary);
    transition: var(--transition);
}
.marquee-item:hover { color: var(--accent-cyan); }
.marquee-dot {
    width: 6px;
    height: 6px;
    background: var(--accent-cyan);
    border-radius: 50%;
    flex-shrink: 0;
    opacity: 0.5;
}

/* ===== About Section ===== */
.about-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 32px;
    margin-bottom: 64px;
}
.about-card {
    padding: 40px;
}
.about-card-icon {
    width: 56px;
    height: 56px;
    border-radius: 14px;
    background: rgba(0, 212, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-cyan);
    margin-bottom: 24px;
}
.about-card-icon svg { width: 28px; height: 28px; }
.about-card h3 {
    font-size: 1.5rem;
    margin-bottom: 16px;
}
.about-card p {
    color: var(--text-secondary);
    margin-bottom: 16px;
    line-height: 1.8;
}
.about-card strong { color: var(--text-primary); }
.about-side {
    display: flex;
    flex-direction: column;
    gap: 20px;
}
.about-feature {
    display: flex;
    gap: 16px;
    align-items: flex-start;
    padding: 24px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    transition: var(--transition);
}
.about-feature:hover {
    border-color: var(--border-hover);
    transform: translateX(4px);
}
.about-feature-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: color-mix(in srgb, var(--c) 15%, transparent);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--c);
    flex-shrink: 0;
}
.about-feature-icon svg { width: 24px; height: 24px; }
.about-feature h4 {
    font-size: 1.1rem;
    margin-bottom: 4px;
}
.about-feature p {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* ===== Timeline ===== */
.timeline {
    position: relative;
    padding-left: 32px;
}
.timeline::before {
    content: '';
    position: absolute;
    left: 7px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--accent-cyan), var(--accent-purple), transparent);
}
.timeline-item {
    position: relative;
    padding-bottom: 40px;
}
.timeline-item:last-child { padding-bottom: 0; }
.timeline-dot {
    position: absolute;
    left: -32px;
    top: 4px;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--bg-primary);
    border: 3px solid var(--accent-cyan);
    box-shadow: 0 0 12px rgba(0, 212, 255, 0.4);
}
.timeline-date {
    font-size: 0.85rem;
    color: var(--accent-cyan);
    font-weight: 600;
    margin-bottom: 6px;
}
.timeline-content h4 {
    font-size: 1.15rem;
    margin-bottom: 6px;
}
.timeline-content p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* ===== Services Bento Grid ===== */
.services-bento {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-auto-rows: minmax(280px, auto);
    gap: 20px;
}
.bento-card {
    position: relative;
    overflow: hidden;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 32px;
    transition: var(--transition);
    cursor: default;
}
.bento-card:hover {
    border-color: color-mix(in srgb, var(--accent) 40%, transparent);
    transform: translateY(-4px);
    box-shadow: 0 12px 40px color-mix(in srgb, var(--accent) 15%, transparent);
}
.bento-large { grid-column: span 2; grid-row: span 2; }
.bento-wide { grid-column: span 2; }
.bento-bg-pattern {
    position: absolute;
    top: 0;
    right: 0;
    width: 200px;
    height: 200px;
    opacity: 0.05;
    background: radial-gradient(circle, var(--accent) 0%, transparent 70%);
    transition: var(--transition);
}
.bento-card:hover .bento-bg-pattern {
    opacity: 0.15;
    transform: scale(1.2);
}
.bento-content { position: relative; z-index: 1; height: 100%; display: flex; flex-direction: column; }
.bento-icon {
    width: 56px;
    height: 56px;
    border-radius: 14px;
    background: color-mix(in srgb, var(--accent) 12%, transparent);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent);
    margin-bottom: 20px;
    transition: var(--transition);
}
.bento-card:hover .bento-icon {
    transform: scale(1.05);
    background: color-mix(in srgb, var(--accent) 20%, transparent);
}
.bento-icon svg { width: 28px; height: 28px; }
.bento-content h3 {
    font-size: 1.3rem;
    margin-bottom: 12px;
}
.bento-desc {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
    margin-bottom: 16px;
    flex: 1;
}
.bento-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}
.bento-tags li {
    font-size: 0.8rem;
    padding: 4px 12px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-color);
    border-radius: 100px;
    color: var(--text-secondary);
    transition: var(--transition);
}
.bento-card:hover .bento-tags li {
    border-color: color-mix(in srgb, var(--accent) 30%, transparent);
    color: var(--text-primary);
}

/* ===== Solutions ===== */
.solutions-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}
.solution-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    overflow: hidden;
    transition: var(--transition);
}
.solution-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 212, 255, 0.1);
}
.solution-img {
    height: 200px;
    background: linear-gradient(135deg, var(--g1), var(--g2));
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}
.solution-img::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 70% 30%, rgba(255,255,255,0.15), transparent 60%);
}
.solution-svg {
    width: 80px;
    height: 80px;
    color: rgba(255, 255, 255, 0.9);
    position: relative;
    z-index: 1;
    transition: var(--transition);
}
.solution-card:hover .solution-svg {
    transform: scale(1.1);
}
.solution-body {
    padding: 28px;
}
.solution-body h3 {
    font-size: 1.3rem;
    margin-bottom: 12px;
}
.solution-body p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
    margin-bottom: 16px;
}
.solution-features {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}
.solution-features span {
    font-size: 0.8rem;
    padding: 4px 12px;
    background: rgba(0, 212, 255, 0.08);
    border: 1px solid rgba(0, 212, 255, 0.15);
    border-radius: 100px;
    color: var(--accent-cyan);
}

/* ===== Technology Section ===== */
.tech-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 32px;
    align-items: start;
}
.tech-categories {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 24px;
}
.tech-tab {
    padding: 10px 20px;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-secondary);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 100px;
    transition: var(--transition);
}
.tech-tab:hover { color: var(--text-primary); border-color: var(--border-hover); }
.tech-tab.active {
    background: var(--gradient-main);
    color: #fff;
    border-color: transparent;
}
.tech-content {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 32px;
}
.tech-panel { display: none; }
.tech-panel.active { display: block; animation: fadeIn 0.4s; }
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}
.tech-panel h4 {
    font-size: 1.3rem;
    margin-bottom: 12px;
}
.tech-panel > p {
    color: var(--text-secondary);
    margin-bottom: 20px;
}
.tech-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}
.tech-tag {
    padding: 8px 16px;
    font-size: 0.85rem;
    font-family: var(--font-mono);
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-secondary);
    transition: var(--transition);
}
.tech-tag:hover {
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
    background: rgba(0, 212, 255, 0.08);
    transform: translateY(-2px);
}
/* Tech capability bars */
.tech-capability {
    padding: 32px;
    position: sticky;
    top: 100px;
}
.tech-capability h4 {
    font-size: 1.3rem;
    margin-bottom: 24px;
}
.capability-item { margin-bottom: 20px; }
.capability-head {
    display: flex;
    justify-content: space-between;
    margin-bottom: 8px;
    font-size: 0.9rem;
}
.capability-score { color: var(--accent-cyan); font-weight: 600; }
.capability-bar {
    height: 6px;
    background: rgba(255, 255, 255, 0.06);
    border-radius: 6px;
    overflow: hidden;
}
.capability-fill {
    height: 100%;
    width: 0;
    background: var(--gradient-main);
    border-radius: 6px;
    transition: width 1.2s cubic-bezier(0.4, 0, 0.2, 1);
}
.tech-capability.visible .capability-fill {
    width: var(--w);
}

/* ===== Advantages ===== */
.advantages-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.advantage-card {
    padding: 36px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}
.advantage-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-main);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s;
}
.advantage-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-4px);
}
.advantage-card:hover::before { transform: scaleX(1); }
.advantage-num {
    font-size: 3rem;
    font-weight: 800;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 16px;
    line-height: 1;
}
.advantage-card h3 {
    font-size: 1.2rem;
    margin-bottom: 12px;
}
.advantage-card p {
    color: var(--text-secondary);
    font-size: 0.92rem;
    line-height: 1.7;
}

/* ===== Cases ===== */
.cases-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}
.case-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    overflow: hidden;
    transition: var(--transition);
}
.case-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 212, 255, 0.1);
}
.case-banner {
    height: 180px;
    background: linear-gradient(135deg, var(--g1), var(--g2));
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}
.case-banner::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 60% 40%, rgba(255,255,255,0.12), transparent 50%);
}
.case-svg {
    width: 64px;
    height: 64px;
    color: rgba(255, 255, 255, 0.85);
    position: relative;
    z-index: 1;
}
.case-tag {
    position: absolute;
    top: 16px;
    right: 16px;
    padding: 4px 12px;
    background: rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(10px);
    border-radius: 100px;
    font-size: 0.8rem;
    color: #fff;
    z-index: 2;
}
.case-body { padding: 28px; }
.case-body h3 { font-size: 1.2rem; margin-bottom: 12px; }
.case-body p { color: var(--text-secondary); font-size: 0.92rem; line-height: 1.7; margin-bottom: 20px; }
.case-stats {
    display: flex;
    gap: 24px;
    padding-top: 16px;
    border-top: 1px solid var(--border-color);
}
.case-stats div { display: flex; flex-direction: column; }
.case-stats strong {
    font-size: 1.3rem;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}
.case-stats span { font-size: 0.75rem; color: var(--text-muted); }

/* ===== Stats Banner ===== */
.stats-banner {
    padding: 80px 0;
    position: relative;
    overflow: hidden;
}
.stats-banner-bg {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 20% 50%, rgba(0, 212, 255, 0.08), transparent 50%),
        radial-gradient(circle at 80% 50%, rgba(124, 58, 237, 0.08), transparent 50%);
}
.stats-banner-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
    position: relative;
    z-index: 1;
}
.stat-banner-item { text-align: center; }
.stat-banner-num {
    font-size: 3.5rem;
    font-weight: 800;
    display: inline;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}
.stat-banner-suffix {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-cyan);
}
.stat-banner-label {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-top: 8px;
}

/* ===== News ===== */
.news-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}
.news-featured { grid-column: span 2; display: grid; grid-template-columns: 300px 1fr; gap: 0; overflow: hidden; }
.news-featured .news-img {
    background: linear-gradient(135deg, var(--g1), var(--g2));
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}
.news-featured .news-img::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 60% 40%, rgba(255,255,255,0.12), transparent 50%);
}
.news-svg { width: 80px; height: 80px; color: rgba(255,255,255,0.85); position: relative; z-index: 1; }
.news-featured .news-body { padding: 32px; }
.news-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    overflow: hidden;
    transition: var(--transition);
}
.news-card:not(.news-featured) { padding: 28px; }
.news-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-4px);
}
.news-meta {
    display: flex;
    gap: 12px;
    align-items: center;
    margin-bottom: 12px;
}
.news-date { font-size: 0.8rem; color: var(--text-muted); }
.news-category {
    font-size: 0.75rem;
    padding: 3px 10px;
    background: rgba(0, 212, 255, 0.1);
    color: var(--accent-cyan);
    border-radius: 100px;
    font-weight: 600;
}
.news-card h3 {
    font-size: 1.15rem;
    margin-bottom: 12px;
    transition: var(--transition);
}
.news-card:hover h3 { color: var(--accent-cyan); }
.news-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.7;
    margin-bottom: 16px;
}
.news-link {
    font-size: 0.9rem;
    color: var(--accent-cyan);
    font-weight: 600;
    transition: var(--transition);
}
.news-link:hover { gap: 12px; }

/* ===== Contact ===== */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
}
.contact-info-card { padding: 36px; }
.contact-info-card h3 { font-size: 1.4rem; margin-bottom: 4px; }
.contact-info-en { font-size: 0.85rem; color: var(--text-muted); margin-bottom: 32px; }
.contact-items { display: flex; flex-direction: column; gap: 20px; margin-bottom: 32px; }
.contact-item { display: flex; gap: 16px; align-items: flex-start; }
.contact-item-icon {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    background: rgba(0, 212, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-cyan);
    flex-shrink: 0;
}
.contact-item-icon svg { width: 22px; height: 22px; }
.contact-item-label {
    display: block;
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 2px;
}
.contact-item-value { font-size: 0.95rem; color: var(--text-primary); }
.contact-credentials {
    padding-top: 24px;
    border-top: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.credential-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
}
.credential-label { color: var(--text-muted); }
.credential-value { color: var(--text-primary); font-family: var(--font-mono); }

/* Contact Form */
.contact-form { padding: 36px; }
.contact-form h3 { font-size: 1.4rem; margin-bottom: 4px; }
.form-desc { color: var(--text-secondary); font-size: 0.9rem; margin-bottom: 24px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { margin-bottom: 16px; }
.form-group label {
    display: block;
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 6px;
}
.form-group label span { color: var(--accent-red); }
.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px 16px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    color: var(--text-primary);
    font-size: 0.9rem;
    transition: var(--transition);
}
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--accent-cyan);
    background: rgba(0, 212, 255, 0.04);
    box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1);
}
.form-group textarea { resize: vertical; }
.form-group select { cursor: pointer; }
.form-group select option { background: var(--bg-secondary); }
.form-note {
    font-size: 0.78rem;
    color: var(--text-muted);
    text-align: center;
    margin-top: 12px;
}
.form-success {
    display: none;
    padding: 16px;
    background: rgba(0, 240, 160, 0.1);
    border: 1px solid rgba(0, 240, 160, 0.3);
    border-radius: 12px;
    color: var(--accent-green);
    font-size: 0.9rem;
    margin-bottom: 16px;
}
.form-success.show { display: block; animation: fadeIn 0.4s; }

/* ===== Footer ===== */
.footer {
    padding: 64px 0 32px;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
}
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr 1.5fr;
    gap: 40px;
    margin-bottom: 48px;
}
.footer-brand .nav-logo { margin-bottom: 16px; }
.footer-desc {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.8;
    margin-bottom: 20px;
}
.footer-social { display: flex; gap: 12px; }
.social-link {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: var(--transition);
}
.social-link:hover {
    background: rgba(0, 212, 255, 0.1);
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
    transform: translateY(-2px);
}
.footer-col h4 {
    font-size: 0.95rem;
    margin-bottom: 16px;
    color: var(--text-primary);
}
.footer-col ul { display: flex; flex-direction: column; gap: 10px; }
.footer-col ul li { font-size: 0.88rem; color: var(--text-secondary); }
.footer-col ul li a { transition: var(--transition); }
.footer-col ul li a:hover { color: var(--accent-cyan); }
.footer-bottom {
    padding-top: 24px;
    border-top: 1px solid var(--border-color);
    text-align: center;
}
.footer-bottom p {
    font-size: 0.82rem;
    color: var(--text-muted);
    margin-bottom: 4px;
}
.footer-filing {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    flex-wrap: wrap;
    margin-top: 6px;
    font-size: 0.82rem;
    color: var(--text-muted);
}
.filing-link {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    color: var(--text-muted);
    text-decoration: none;
    transition: var(--transition);
}
.filing-link:hover {
    color: var(--accent-cyan);
}
.filing-sep {
    color: var(--text-muted);
    opacity: 0.5;
}
.filing-badge {
    flex-shrink: 0;
}

/* ===== Back to Top ===== */
.back-to-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 900;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: var(--transition);
}
.back-to-top.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}
.back-to-top:hover {
    background: var(--gradient-main);
    border-color: transparent;
    color: #fff;
    transform: translateY(-2px);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .hero-title { font-size: 3rem; }
    .about-grid { grid-template-columns: 1fr; }
    .tech-grid { grid-template-columns: 1fr; }
    .tech-capability { position: static; }
    .services-bento { grid-template-columns: repeat(2, 1fr); }
    .bento-large { grid-column: span 2; grid-row: span 1; }
    .bento-wide { grid-column: span 2; }
    .footer-grid { grid-template-columns: 1fr 1fr 1fr; }
    .footer-brand { grid-column: span 3; }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 64px;
        left: 0;
        right: 0;
        flex-direction: column;
        background: rgba(10, 14, 26, 0.98);
        backdrop-filter: blur(20px);
        padding: 20px;
        gap: 4px;
        border-bottom: 1px solid var(--border-color);
        transform: translateY(-120%);
        transition: var(--transition);
    }
    .nav-menu.active { transform: translateY(0); }
    .nav-toggle { display: flex; }
    .nav-cta { width: 100%; text-align: center; margin-top: 8px; }

    .hero-title { font-size: 2.2rem; }
    .hero-desc { font-size: 1rem; }
    .hero-desc br { display: none; }
    .hero-actions { flex-direction: column; align-items: center; }
    .hero-stats { gap: 20px; }
    .hero-stat-divider { display: none; }
    .hero-stat-num { font-size: 2rem; }

    .section { padding: 80px 0; }
    .section-title { font-size: 1.8rem; }
    .section-header { margin-bottom: 40px; }

    .services-bento { grid-template-columns: 1fr; }
    .bento-large, .bento-wide { grid-column: span 1; }

    .solutions-grid { grid-template-columns: 1fr; }
    .advantages-grid { grid-template-columns: 1fr; }
    .cases-grid { grid-template-columns: 1fr; }
    .news-grid { grid-template-columns: 1fr; }
    .news-featured { grid-column: span 1; grid-template-columns: 1fr; }
    .news-featured .news-img { height: 160px; }

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

    .stats-banner-grid { grid-template-columns: 1fr 1fr; gap: 24px; }
    .stat-banner-num { font-size: 2.5rem; }

    .footer-grid { grid-template-columns: 1fr 1fr; gap: 24px; }
    .footer-brand { grid-column: span 2; }

    .back-to-top { bottom: 20px; right: 20px; }
}

@media (max-width: 480px) {
    .hero-title { font-size: 1.8rem; }
    .hero-stats { flex-direction: column; gap: 16px; }
    .section-title { font-size: 1.5rem; }
    .stats-banner-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; }
    .footer-brand { grid-column: span 1; }
}

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

/* ===== Scrollbar ===== */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover { background: rgba(0, 212, 255, 0.3); }

/* ===== Selection ===== */
::selection {
    background: rgba(0, 212, 255, 0.3);
    color: #fff;
}