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

:root {
    --bg: #0a0a0f;
    --bg2: #12121a;
    --card: #161620;
    --card-hover: #1c1c2a;
    --text: #f0f0f5;
    --text-dim: #8888a0;
    --accent: #6c5ce7;
    --accent2: #00d2ff;
    --accent3: #fd79a8;
    --border: rgba(255,255,255,0.08);
    --radius: 16px;
    --max: 1200px;
}

html { scroll-behavior: smooth; }

body {
    background: var(--bg);
    color: var(--text);
    font-family: 'Noto Sans SC', 'Space Grotesk', sans-serif;
    line-height: 1.7;
    overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; }

/* ===== Language Switch ===== */
.lang-switch {
    position: fixed;
    top: 18px;
    right: 18px;
    z-index: 200;
    display: flex;
    gap: 4px;
    background: rgba(255,255,255,0.06);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border);
    border-radius: 100px;
    padding: 4px;
}
.lang-btn {
    background: none;
    border: none;
    color: var(--text-dim);
    font-size: 13px;
    font-weight: 600;
    padding: 6px 16px;
    border-radius: 100px;
    cursor: pointer;
    transition: all .3s;
    font-family: inherit;
}
.lang-btn.active {
    background: var(--accent);
    color: #fff;
}

/* ===== Nav ===== */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 5%;
    transition: all .4s;
}
.nav.scrolled {
    background: rgba(10,10,15,0.85);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    padding: 12px 5%;
}
.nav-logo {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 22px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent), var(--accent2));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
.nav-links { display: flex; gap: 28px; }
.nav-links a {
    font-size: 14px;
    color: var(--text-dim);
    transition: color .3s;
    position: relative;
}
.nav-links a:hover { color: var(--text); }
.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent2);
    transition: width .3s;
}
.nav-links a:hover::after { width: 100%; }
.nav-cta {
    font-size: 14px;
    font-weight: 600;
    padding: 8px 20px;
    border-radius: 100px;
    background: linear-gradient(135deg, var(--accent), var(--accent2));
    cursor: pointer;
    transition: transform .3s, box-shadow .3s;
}
.nav-right {
    display: flex;
    align-items: center;
    gap: 16px;
}
.nav-login {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-dim);
    padding: 8px 16px;
    border: 1px solid var(--border);
    border-radius: 100px;
    transition: all .3s;
}
.nav-login:hover {
    color: var(--text);
    border-color: var(--accent2);
}
.nav-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(108,92,231,0.4);
}

/* ===== Hero ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    position: relative;
    overflow: hidden;
}
.hero-bg { position: absolute; inset: 0; z-index: 0; }
.orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.5;
    animation: float 12s ease-in-out infinite;
}
.orb-1 { width: 400px; height: 400px; background: var(--accent); top: 10%; left: 10%; }
.orb-2 { width: 350px; height: 350px; background: var(--accent2); bottom: 15%; right: 10%; animation-delay: -4s; }
.orb-3 { width: 300px; height: 300px; background: var(--accent3); top: 40%; left: 50%; animation-delay: -8s; }

@keyframes float {
    0%, 100% { transform: translate(0,0) scale(1); }
    33% { transform: translate(30px,-40px) scale(1.1); }
    66% { transform: translate(-20px,30px) scale(0.95); }
}

.hero-content { position: relative; z-index: 1; max-width: 800px; padding: 0 20px; }
.hero-badge {
    display: inline-block;
    font-size: 14px;
    font-weight: 500;
    padding: 8px 20px;
    border-radius: 100px;
    background: rgba(255,255,255,0.06);
    border: 1px solid var(--border);
    margin-bottom: 24px;
    animation: fadeInUp .8s;
}
.hero-title {
    font-size: clamp(40px, 8vw, 72px);
    font-weight: 900;
    line-height: 1.15;
    margin-bottom: 20px;
    animation: fadeInUp .8s .1s both;
}
.gradient-text {
    background: linear-gradient(135deg, var(--accent2), var(--accent3));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-block;
}
.hero-sub {
    font-size: 18px;
    color: var(--text-dim);
    margin-bottom: 36px;
    animation: fadeInUp .8s .2s both;
}
.hero-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    animation: fadeInUp .8s .3s both;
}
.btn-primary {
    display: inline-block;
    padding: 14px 32px;
    border-radius: 100px;
    background: linear-gradient(135deg, var(--accent), var(--accent2));
    font-weight: 600;
    font-size: 15px;
    cursor: pointer;
    transition: transform .3s, box-shadow .3s;
    border: none;
    font-family: inherit;
    color: #fff;
}
.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 32px rgba(108,92,231,0.4);
}
.btn-ghost {
    padding: 14px 32px;
    border-radius: 100px;
    border: 1px solid var(--border);
    font-weight: 600;
    font-size: 15px;
    transition: all .3s;
}
.btn-ghost:hover {
    background: rgba(255,255,255,0.06);
    border-color: var(--accent2);
}
.hero-scroll {
    margin-top: 60px;
    font-size: 13px;
    color: var(--text-dim);
    animation: bounce 2s infinite;
}
@keyframes bounce {
    0%,100% { transform: translateY(0); opacity: .6; }
    50% { transform: translateY(8px); opacity: 1; }
}
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ===== Section Common ===== */
section { padding: 100px 5%; position: relative; }
.section-head { text-align: center; max-width: 600px; margin: 0 auto 60px; }
.section-tag {
    display: inline-block;
    font-size: 13px;
    font-weight: 600;
    color: var(--accent2);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 12px;
}
.section-title {
    font-size: clamp(28px, 5vw, 42px);
    font-weight: 800;
    margin-bottom: 12px;
}
.section-desc { color: var(--text-dim); font-size: 16px; }

/* ===== Services ===== */
.service-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
    max-width: var(--max);
    margin: 0 auto;
}
.service-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px 28px;
    transition: all .4s;
    transform-style: preserve-3d;
}
.service-card:hover {
    background: var(--card-hover);
    border-color: rgba(108,92,231,0.3);
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.3);
}
.service-icon {
    font-size: 40px;
    margin-bottom: 20px;
    display: inline-block;
    transition: transform .4s;
}
.service-card:hover .service-icon { transform: scale(1.2) rotate(-5deg); }
.service-card h3 { font-size: 20px; font-weight: 700; margin-bottom: 12px; }
.service-card p { color: var(--text-dim); font-size: 14px; margin-bottom: 20px; }
.service-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.service-tags li {
    font-size: 12px;
    padding: 4px 12px;
    border-radius: 100px;
    background: rgba(108,92,231,0.15);
    color: var(--accent2);
    border: 1px solid rgba(108,92,231,0.2);
}

/* ===== Bridge ===== */
.bridge { background: var(--bg2); }
.bridge-toggle {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 50px;
    flex-wrap: wrap;
}
.toggle-btn {
    padding: 14px 28px;
    border-radius: 100px;
    border: 1px solid var(--border);
    background: var(--card);
    color: var(--text-dim);
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all .3s;
    font-family: inherit;
}
.toggle-btn.active {
    background: linear-gradient(135deg, var(--accent), var(--accent2));
    color: #fff;
    border-color: transparent;
}
.toggle-btn:hover:not(.active) { color: var(--text); border-color: var(--accent2); }

.bridge-visual {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 40px;
    margin-bottom: 50px;
}
.bridge-side { text-align: center; }
.bridge-flag {
    font-size: 56px;
    transition: transform .5s;
}
.bridge-flag:hover { transform: scale(1.15); }
.bridge-label { font-size: 14px; color: var(--text-dim); margin-top: 8px; }
.bridge-line {
    flex: 1;
    max-width: 200px;
    height: 2px;
    background: var(--border);
    position: relative;
    overflow: hidden;
}
.bridge-pulse {
    position: absolute;
    top: 0;
    left: 0;
    width: 40px;
    height: 100%;
    background: linear-gradient(90deg, transparent, var(--accent2), transparent);
    animation: pulse 2.5s linear infinite;
}
.bridge-pulse.delay { animation-delay: 1.25s; }
@keyframes pulse {
    from { left: -40px; }
    to { left: 100%; }
}

.bridge-content { max-width: var(--max); margin: 0 auto; }
.bridge-panel { display: none; animation: fadeIn .5s; }
.bridge-panel.active { display: block; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }

.bridge-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
}
.bridge-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px;
    transition: all .3s;
}
.bridge-card:hover {
    border-color: var(--accent2);
    transform: translateY(-4px);
}
.bc-num {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 28px;
    font-weight: 700;
    color: var(--accent);
    opacity: 0.5;
    margin-bottom: 12px;
}
.bridge-card h4 { font-size: 17px; font-weight: 700; margin-bottom: 8px; }
.bridge-card p { color: var(--text-dim); font-size: 14px; }

/* ===== Process ===== */
.process-timeline {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
}
.process-timeline::before {
    content: '';
    position: absolute;
    left: 24px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--accent), var(--accent2), transparent);
}
.process-step {
    display: flex;
    gap: 24px;
    margin-bottom: 40px;
    align-items: flex-start;
    opacity: 0;
    transform: translateX(-20px);
    transition: all .6s;
}
.process-step.visible {
    opacity: 1;
    transform: translateX(0);
}
.step-dot {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--card);
    border: 2px solid var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 18px;
    flex-shrink: 0;
    z-index: 1;
    transition: all .3s;
}
.process-step.visible .step-dot {
    background: var(--accent);
    color: #fff;
    box-shadow: 0 0 20px rgba(108,92,231,0.5);
}
.step-content h4 { font-size: 18px; font-weight: 700; margin-bottom: 6px; }
.step-content p { color: var(--text-dim); font-size: 14px; }

/* ===== Stats ===== */
.stats { background: var(--bg2); }
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 24px;
    max-width: var(--max);
    margin: 0 auto;
    text-align: center;
}
.stat-item {
    padding: 40px 20px;
}
.stat-num {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 48px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent2), var(--accent3));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 8px;
}
.stat-label { color: var(--text-dim); font-size: 15px; }

/* ===== Contact ===== */
.contact { padding: 120px 5%; }
.contact-card {
    max-width: 560px;
    margin: 0 auto;
    text-align: center;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 24px;
    padding: 48px 40px;
}
.contact-card h2 { font-size: 28px; font-weight: 800; margin-bottom: 12px; }
.contact-card > p { color: var(--text-dim); margin-bottom: 32px; }
.contact-form { display: flex; flex-direction: column; gap: 14px; }
.contact-form input, .contact-form textarea {
    width: 100%;
    padding: 14px 18px;
    border-radius: 12px;
    background: var(--bg);
    border: 1px solid var(--border);
    color: var(--text);
    font-size: 15px;
    font-family: inherit;
    transition: border-color .3s;
}
.contact-form input:focus, .contact-form textarea:focus {
    outline: none;
    border-color: var(--accent2);
}
.contact-form button { margin-top: 8px; }
.contact-info {
    margin-top: 28px;
    display: flex;
    justify-content: center;
    gap: 24px;
    font-size: 14px;
    color: var(--text-dim);
}

/* ===== Footer ===== */
.footer {
    padding: 40px 5%;
    text-align: center;
    border-top: 1px solid var(--border);
}
.footer-logo {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 8px;
    background: linear-gradient(135deg, var(--accent), var(--accent2));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
.footer-content p { color: var(--text-dim); font-size: 14px; }
.footer-copy { margin-top: 8px; font-size: 12px; opacity: 0.5; }

/* ===== Responsive ===== */
@media (max-width: 768px) {
    .nav-links { display: none; }
    .nav-cta { font-size: 13px; padding: 6px 16px; }
    .hero-actions { flex-direction: column; align-items: center; }
    .bridge-visual { gap: 16px; }
    .bridge-line { max-width: 80px; }
    .bridge-flag { font-size: 40px; }
    .process-timeline::before { left: 20px; }
    .step-dot { width: 42px; height: 42px; font-size: 15px; }
}