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

:root {
  --bg: #111111;
  --bg2: #1a1a1a;
  --white: #ffffff;
  --gray: #888888;
  --gray2: #333333;
  --font-en: 'Inter', sans-serif;
  --font-zh: 'Noto Sans SC', sans-serif;
}

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--white);
  font-family: var(--font-en);
  -webkit-font-smoothing: antialiased;
}

a { text-decoration: none; color: inherit; }

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 40px;
}

/* NAV */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 28px 60px;
  background: rgba(17,17,17,0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.nav-logo {
  font-size: 15px;
  font-weight: 800;
  letter-spacing: 3px;
  color: var(--white);
}
.nav-logo span { color: var(--gray); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 36px;
}

.nav-links a {
  font-size: 13px;
  color: var(--gray);
  letter-spacing: 0.5px;
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--white); }

.nav-cta {
  border: 1px solid var(--gray2);
  padding: 8px 20px;
  font-size: 12px !important;
  color: var(--white) !important;
  letter-spacing: 1px;
  transition: background 0.2s, border-color 0.2s !important;
}
.nav-cta:hover { background: var(--white); color: var(--bg) !important; border-color: var(--white); }

.lang-toggle {
  background: none;
  border: 1px solid var(--gray2);
  color: var(--gray);
  font-size: 12px;
  padding: 6px 14px;
  cursor: pointer;
  letter-spacing: 1px;
  font-family: var(--font-zh);
  transition: all 0.2s;
}
.lang-toggle:hover { border-color: var(--white); color: var(--white); }

/* HERO */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  padding: 120px 60px 80px;
  text-align: center;
}

.hero::before {
  content: '';
  position: absolute;
  top: 30%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(255,255,255,0.04) 0%, transparent 70%);
  pointer-events: none;
}

.hero-content { position: relative; max-width: 900px; }

.hero-label {
  font-size: 11px;
  letter-spacing: 4px;
  color: var(--gray);
  margin-bottom: 32px;
}

.hero-title {
  font-size: clamp(52px, 8vw, 110px);
  font-weight: 900;
  line-height: 1.0;
  letter-spacing: -2px;
  color: var(--white);
  margin-bottom: 32px;
}

.hero-sub {
  font-size: 16px;
  color: var(--gray);
  max-width: 520px;
  margin: 0 auto 48px;
  line-height: 1.7;
  font-weight: 300;
}

.btn-primary {
  display: inline-block;
  background: var(--white);
  color: var(--bg);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 1.5px;
  padding: 16px 40px;
  transition: all 0.25s;
}
.btn-primary:hover {
  background: transparent;
  color: var(--white);
  outline: 1px solid var(--white);
}

.hero-scroll {
  position: absolute;
  bottom: 40px;
  left: 60px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.hero-scroll span {
  font-size: 10px;
  letter-spacing: 3px;
  color: var(--gray);
  writing-mode: vertical-rl;
}
.scroll-line {
  width: 1px;
  height: 60px;
  background: linear-gradient(to bottom, var(--gray), transparent);
}

/* CLIENTS */
.clients {
  border-top: 1px solid var(--gray2);
  border-bottom: 1px solid var(--gray2);
  padding: 32px 0;
  overflow: hidden;
}

.clients-label {
  text-align: center;
  font-size: 10px;
  letter-spacing: 3px;
  color: var(--gray);
  margin-bottom: 24px;
}

.marquee-track { overflow: hidden; }
.marquee-inner {
  display: flex;
  gap: 80px;
  animation: marquee 20s linear infinite;
  width: max-content;
}
.marquee-inner span {
  font-size: 11px;
  letter-spacing: 3px;
  color: var(--gray);
  white-space: nowrap;
  font-weight: 600;
}

.logos-inner {
  gap: 56px;
  align-items: center;
}
.logos-inner img {
  height: 28px;
  width: auto;
  opacity: 0.5;
  filter: grayscale(1);
  transition: opacity 0.2s;
  flex-shrink: 0;
}
.logos-inner img:hover { opacity: 0.9; }

@keyframes marquee {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

/* SERVICES */
.services { padding: 120px 0; }

.section-header { margin-bottom: 60px; }
.section-label {
  font-size: 10px;
  letter-spacing: 4px;
  color: var(--gray);
  margin-bottom: 16px;
}
.section-header h2 {
  font-size: clamp(32px, 4vw, 52px);
  font-weight: 800;
  letter-spacing: -1px;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--gray2);
  border: 1px solid var(--gray2);
}

.service-card {
  background: var(--bg);
  padding: 48px;
  transition: background 0.3s;
}
.service-card:hover { background: var(--bg2); }

.service-num {
  font-size: 11px;
  letter-spacing: 2px;
  color: var(--gray);
  margin-bottom: 24px;
}

.service-card h3 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}

.service-card p {
  font-size: 14px;
  color: var(--gray);
  line-height: 1.7;
  font-weight: 300;
}

/* STATS */
.stats {
  padding: 80px 0;
  border-top: 1px solid var(--gray2);
  border-bottom: 1px solid var(--gray2);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
}

.stat {
  text-align: center;
  padding: 40px;
  border-right: 1px solid var(--gray2);
}
.stat:last-child { border-right: none; }

.stat-num {
  font-size: 64px;
  font-weight: 900;
  letter-spacing: -2px;
  line-height: 1;
  margin-bottom: 12px;
}
.stat-num span {
  font-size: 32px;
  color: var(--gray);
}

.stat-label {
  font-size: 12px;
  letter-spacing: 2px;
  color: var(--gray);
}

/* WORK */
.work { padding: 120px 0; }

.work-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.work-card--featured {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}
.work-card--featured .work-img {
  height: 360px;
  margin-bottom: 0;
  position: relative;
}
.work-img--tiktok { border-color: #333; }

.work-img-overlay {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.75) 0%, rgba(0,0,0,0.1) 60%);
  display: flex;
  align-items: flex-end;
  padding: 24px;
}

.tiktok-stats {
  display: flex;
  align-items: center;
  gap: 24px;
}
.tiktok-stat { text-align: center; }
.tiktok-num {
  display: block;
  font-size: 32px;
  font-weight: 900;
  color: #fff;
  letter-spacing: -1px;
}
.tiktok-num--highlight { color: #ffffff; }
.tiktok-label {
  font-size: 10px;
  letter-spacing: 2px;
  color: rgba(255,255,255,0.6);
  text-transform: uppercase;
}
.tiktok-arrow {
  font-size: 24px;
  color: rgba(255,255,255,0.4);
}

.work-card { cursor: pointer; }

.work-img {
  width: 100%;
  height: 280px;
  background: var(--bg2);
  border: 1px solid var(--gray2);
  margin-bottom: 24px;
  transition: border-color 0.3s;
  position: relative;
  overflow: hidden;
}
.work-card:hover .work-img { border-color: #555; }

.work-tag {
  font-size: 10px;
  letter-spacing: 2px;
  color: var(--gray);
  margin-bottom: 12px;
}

.work-info h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 12px;
  letter-spacing: -0.3px;
}

.work-info p {
  font-size: 14px;
  color: var(--gray);
  line-height: 1.7;
  margin-bottom: 20px;
  font-weight: 300;
}

.work-link {
  font-size: 12px;
  letter-spacing: 1px;
  color: var(--white);
  border-bottom: 1px solid var(--gray2);
  padding-bottom: 2px;
  transition: border-color 0.2s;
}
.work-link:hover { border-color: var(--white); }

/* CONTACT */
.contact {
  padding: 160px 0;
  text-align: center;
  border-top: 1px solid var(--gray2);
}

.contact-inner { max-width: 640px; margin: 0 auto; }
.contact-inner h2 {
  font-size: clamp(36px, 5vw, 64px);
  font-weight: 900;
  letter-spacing: -1.5px;
  margin-bottom: 24px;
}

.contact-sub {
  font-size: 15px;
  color: var(--gray);
  line-height: 1.7;
  margin-bottom: 48px;
  font-weight: 300;
}

/* FOOTER */
.footer {
  padding: 40px 0;
  border-top: 1px solid var(--gray2);
}

.footer-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 32px;
}

.footer-links {
  display: flex;
  gap: 32px;
}
.footer-links a {
  font-size: 12px;
  color: var(--gray);
  letter-spacing: 0.5px;
  transition: color 0.2s;
}
.footer-links a:hover { color: var(--white); }

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 24px;
  border-top: 1px solid var(--gray2);
}

.footer-bottom p {
  font-size: 12px;
  color: var(--gray);
}

.footer-social {
  display: flex;
  gap: 24px;
}
.footer-social a {
  font-size: 12px;
  color: var(--gray);
  transition: color 0.2s;
}
.footer-social a:hover { color: var(--white); }

/* FADE IN */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* CONTACT BUTTONS */
.contact-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn-secondary {
  display: inline-block;
  border: 1px solid var(--gray2);
  color: var(--gray);
  font-size: 13px;
  letter-spacing: 1px;
  padding: 16px 40px;
  transition: all 0.25s;
}
.btn-secondary:hover {
  border-color: var(--white);
  color: var(--white);
}

/* ABOUT STRIP */
.about-strip {
  padding: 120px 0;
  border-top: 1px solid var(--gray2);
}

.about-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}

.about-text h2 {
  font-size: clamp(32px, 4vw, 52px);
  font-weight: 800;
  letter-spacing: -1px;
  margin-bottom: 24px;
  line-height: 1.1;
}

.about-text p {
  font-size: 15px;
  color: var(--gray);
  line-height: 1.8;
  font-weight: 300;
}

.about-values {
  display: flex;
  flex-direction: column;
  gap: 36px;
  padding-top: 8px;
}

.value-item {
  display: flex;
  gap: 20px;
  align-items: flex-start;
}

.value-icon {
  color: var(--gray);
  font-size: 16px;
  margin-top: 2px;
  flex-shrink: 0;
}

.value-item h4 {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.5px;
  margin-bottom: 6px;
}

.value-item p {
  font-size: 13px;
  color: var(--gray);
  line-height: 1.7;
  font-weight: 300;
}

@media (max-width: 768px) {
  .about-inner { grid-template-columns: 1fr; gap: 48px; }
  .work-card--featured { grid-template-columns: 1fr; }
  .work-card--featured .work-img { height: 240px; margin-bottom: 0; }
  .contact-buttons { flex-direction: column; align-items: center; }
}

/* CHINESE FONT */
body.zh { font-family: var(--font-zh); }

@media (max-width: 768px) {
  .nav { padding: 20px 24px; }
  .nav-links { gap: 16px; }
  .hero { padding: 100px 24px 60px; }
  .hero-scroll { display: none; }
  .services-grid, .work-grid, .stats-grid { grid-template-columns: 1fr; }
  .stat { border-right: none; border-bottom: 1px solid var(--gray2); }
  .container { padding: 0 24px; }
  .footer-top { flex-direction: column; gap: 24px; }
  .footer-bottom { flex-direction: column; gap: 12px; text-align: center; }
}