/* ==========================================================================
   CSS Variables & Roots
   ========================================================================== */
   :root {
    --bg-dark: #05050A;
    --card-bg: rgba(255, 255, 255, 0.03);
    --card-bg-hover: rgba(255, 255, 255, 0.06);
    --border-glass: rgba(255, 255, 255, 0.08);
    --border-glass-strong: rgba(255, 255, 255, 0.15);
    
    --primary: #6366F1; /* Indigo */
    --accent-1: #A855F7; /* Purple */
    --accent-2: #3B82F6; /* Blue */
    --accent-3: #14B8A6; /* Teal */
    
    --text-primary: #F8FAFC;
    --text-secondary: #94A3B8;
    --text-muted: #64748B;
    
    --transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', 'Noto Sans SC', sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
}

::selection {
    background: rgba(99, 102, 241, 0.3);
    color: white;
}

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

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

p {
    color: var(--text-secondary);
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 5%;
}

.section {
    padding: 8rem 0;
    position: relative;
}

.pt-0 { padding-top: 0; }
.mt-2 { margin-top: 0.5rem; }
.mt-4 { margin-top: 1.5rem; }
.mb-4 { margin-bottom: 1.5rem; }
.text-center { text-align: center; }
.text-white { color: white; }

.gradient-text {
    background: linear-gradient(to right, var(--accent-1), var(--accent-2), var(--accent-3));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: inline-block;
}

.relative-wrap { position: relative; z-index: 1; }
.overflow-hidden { overflow: hidden; }

/* ==========================================================================
   Background Blobs & Glow
   ========================================================================== */
.blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    z-index: -1;
    opacity: 0.6;
    animation: drift 20s infinite alternate cubic-bezier(0.4, 0, 0.2, 1);
}

.blob-1 {
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(99,102,241,0.2) 0%, rgba(0,0,0,0) 70%);
    top: -200px;
    left: -200px;
}

.blob-2 {
    width: 700px;
    height: 700px;
    background: radial-gradient(circle, rgba(168,85,247,0.15) 0%, rgba(0,0,0,0) 70%);
    top: 20%;
    right: -200px;
    animation-delay: -5s;
}

.blob-3 {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(20,184,166,0.15) 0%, rgba(0,0,0,0) 70%);
    bottom: -100px;
    left: 20%;
    animation-delay: -10s;
}

@keyframes drift {
    0% { transform: translate(0, 0) scale(1); }
    100% { transform: translate(50px, 100px) scale(1.2); }
}

/* Interactive Cursor Glow */
#glow-cursor {
    position: fixed;
    top: 0;
    left: 0;
    width: 400px;
    height: 400px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(99,102,241,0.1) 0%, rgba(0,0,0,0) 50%);
    pointer-events: none;
    z-index: 0;
    transform: translate(-50%, -50%);
    transition: width 0.3s, height 0.3s;
}

/* ==========================================================================
   UI Components (Buttons, Cards, Glass)
   ========================================================================== */
.glass-effect {
    background: rgba(5, 5, 10, 0.7);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-glass);
}

.glass-card {
    background: var(--card-bg);
    border: 1px solid var(--border-glass);
    border-radius: 20px;
    padding: 2.5rem;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    transition: var(--transition);
}

.glass-card:hover {
    background: var(--card-bg-hover);
    border-color: var(--border-glass-strong);
    transform: translateY(-5px);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.875rem 2rem;
    border-radius: 50px;
    font-weight: 500;
    cursor: pointer;
    font-size: 1rem;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: linear-gradient(90deg, var(--primary), var(--accent-1));
    color: white;
    border: none;
    box-shadow: 0 10px 25px -5px rgba(99, 102, 241, 0.4);
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background: linear-gradient(90deg, var(--accent-1), var(--primary));
    opacity: 0;
    transition: var(--transition);
    z-index: 1;
}

.btn-primary:hover::before { opacity: 1; }
.btn-primary span, .btn-primary i { position: relative; z-index: 2; transition: transform 0.3s; }
.btn-primary:hover i { transform: translateX(5px); }

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

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.3);
}

/* ==========================================================================
   Navbar
   ========================================================================== */
.navbar {
    position: fixed;
    top: 0; left: 0; width: 100%;
    z-index: 100;
    height: 80px;
    display: flex;
    align-items: center;
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.icon-logo {
    display: flex;
    align-items: center; justify-content: center;
    width: 40px; height: 40px;
    background: linear-gradient(135deg, var(--primary), var(--accent-1));
    border-radius: 10px;
    font-size: 1.25rem;
    color: white;
}

.logo-text { display: flex; flex-direction: column; }
.brand-name { font-weight: 700; font-size: 1.2rem; letter-spacing: 1px; }
.brand-sub { font-size: 0.65rem; color: var(--text-secondary); letter-spacing: 2px; }

.nav-links {
    display: flex;
    gap: 2.5rem;
    list-style: none;
}

.nav-links a {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute; bottom: -5px; left: 0;
    width: 0%; height: 2px;
    background: var(--primary);
    transition: var(--transition);
}

.nav-links a:hover { color: white; }
.nav-links a:hover::after { width: 100%; }

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
}

.hero-content {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}

.badge {
    display: inline-block;
    padding: 0.4rem 1.2rem;
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid rgba(99, 102, 241, 0.3);
    border-radius: 50px;
    color: var(--accent-2);
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 1px;
    margin-bottom: 2rem;
}

.hero h1 {
    font-size: clamp(3rem, 6vw, 5.5rem);
    letter-spacing: -1px;
    margin-bottom: 1.5rem;
}

.hero-desc {
    font-size: 1.2rem;
    max-width: 700px;
    margin: 0 auto 3rem;
}

.hero-actions { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }

/* ==========================================================================
   Section Headers
   ========================================================================== */
.section-header { margin-bottom: 4rem; }
.section-title { font-size: 2.5rem; margin-bottom: 1rem; }
.section-subtitle { font-size: 1.1rem; max-width: 600px; margin: 0 auto; }
.divider { width: 60px; height: 4px; background: var(--primary); border-radius: 2px; }

/* ==========================================================================
   About Grid
   ========================================================================== */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

.about-card h3 { font-size: 1.5rem; margin: 1rem 0; }
.card-icon {
    font-size: 2.5rem;
    color: var(--accent-1);
    margin-bottom: 1rem;
}

.about-info-blocks {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.info-block {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1.5rem;
}

.info-icon {
    font-size: 1.5rem;
    color: var(--primary);
    background: rgba(99, 102, 241, 0.1);
    padding: 1rem;
    border-radius: 12px;
}

.info-block h4 { font-size: 1.1rem; margin-bottom: 0.25rem; color: white; }
.info-block p { font-size: 0.9rem; line-height: 1.4; }
.md-col-span-2 { grid-column: span 2; }

/* ==========================================================================
   Services Grid
   ========================================================================== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.service-card { position: relative; }
.service-icon {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, var(--accent-2), var(--accent-3));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
.service-card h3 { font-size: 1.35rem; margin-bottom: 1rem; color: white; }
.service-card p { font-size: 0.95rem; }

/* Glow Border Effect specifically for services */
.glow-border::before {
    content: '';
    position: absolute; top: 0; left: 0; width: 100%; height: 100%;
    border-radius: inherit;
    background: linear-gradient(135deg, rgba(255,255,255,0.2), rgba(255,255,255,0));
    padding: 1px;
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    pointer-events: none;
    transition: var(--transition);
}

.glow-border:hover::before { background: linear-gradient(135deg, var(--primary), var(--accent-1)); }

/* ==========================================================================
   Marquee Carousel Animation
   ========================================================================== */
.tag-title { font-size: 1rem; letter-spacing: 2px; text-transform: uppercase; color: var(--text-muted); margin-bottom: 2rem;}

.marquee-wrapper {
    position: relative;
    width: 100%;
    overflow: hidden;
    mask-image: linear-gradient(to right, transparent, black 10%, black 90%, transparent);
    -webkit-mask-image: linear-gradient(to right, transparent, black 10%, black 90%, transparent);
}

.marquee {
    display: flex;
    width: max-content;
    animation: scroll-left 40s linear infinite;
}

.marquee:hover { animation-play-state: paused; }

.marquee-content {
    display: flex;
    justify-content: space-around;
    align-items: center;
}

/* 标签样式 */
.business-tag {
    display: inline-flex;
    padding: 0.8rem 1.8rem;
    margin: 0 0.8rem;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-glass-strong);
    border-radius: 50px;
    font-size: 0.95rem;
    white-space: nowrap;
    color: var(--text-secondary);
    transition: var(--transition);
}

.business-tag:hover {
    background: rgba(99, 102, 241, 0.1);
    color: var(--text-primary);
    border-color: var(--primary);
    transform: scale(1.05);
}

@keyframes scroll-left {
    from { transform: translateX(0); }
    to { transform: translateX(-50%); } 
    /* Translates by 50% because we cloned the div. 50% means moving exactly one normal set's width */
}

/* ==========================================================================
   Footer
   ========================================================================== */
.border-t-glass { border-top: 1px solid var(--border-glass); }
.footer { padding-top: 5rem; background: linear-gradient(to top, rgba(0,0,0,0.5), transparent); }
.footer-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    margin-bottom: 4rem;
}
.footer-desc { max-width: 300px; }
.contact-list { list-style: none; }
.contact-list li {
    display: flex; align-items: flex-start; gap: 1rem;
    margin-bottom: 1rem; color: var(--text-secondary);
}
.contact-list i { margin-top: 0.3rem; color: var(--accent-3); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.05); padding: 1.5rem 0; }
.footer-bottom-inner { display: flex; justify-content: space-between; align-items: center; }
.social-links { display: flex; gap: 1rem; }
.social-links a {
    width: 36px; height: 36px;
    border-radius: 50%;
    background: rgba(255,255,255,0.05);
    display: flex; align-items: center; justify-content: center;
    color: white; font-size: 1rem;
}
.social-links a:hover { background: var(--primary); transform: translateY(-3px); }

/* ==========================================================================
   Animations
   ========================================================================== */
.fade-in-up {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.fade-in-up.appear {
    opacity: 1;
    transform: translateY(0);
}

/* ==========================================================================
   Responsive Design
   ========================================================================== */
@media (max-width: 900px) {
    .about-grid, .footer-content { grid-template-columns: 1fr; gap: 2rem; }
    .md-col-span-2 { grid-column: span 1; }
    .about-info-blocks { grid-template-columns: 1fr; }
    .nav-links { display: none; } /* Mobile menu toggle omitted for brevity */
    .hero h1 { font-size: 3rem; }
    .footer-bottom-inner { flex-direction: column; gap: 1rem; text-align: center; }
}