:root {
  --bg: #f5f5f7;
  --card: #ffffff;
  --text: #1d1d1f;
  --muted: rgba(29, 29, 31, 0.68);
  --soft: rgba(29, 29, 31, 0.5);
  --border: rgba(0, 0, 0, 0.08);
  --blue: #0071e3;
  --shadow: 0 20px 60px rgba(0, 0, 0, 0.06);
  --radius-lg: 32px;
  --radius-md: 24px;
  --radius-sm: 999px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text",
    "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

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

.container {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 0;
}

.brand {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(0, 0, 0, 0.72);
}

nav {
  display: flex;
  gap: 28px;
}

nav a {
  font-size: 14px;
  color: rgba(0, 0, 0, 0.62);
  transition: 0.2s ease;
}

nav a:hover {
  color: #000;
}

.hero {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(circle at top, rgba(0, 113, 227, 0.10), transparent 35%),
    linear-gradient(to bottom, #ffffff, transparent 65%);
}

.hero-inner {
  text-align: center;
  padding: 90px 0 80px;
}

.badge {
  display: inline-block;
  padding: 10px 18px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.85);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.04);
  font-size: 14px;
  color: var(--muted);
}

.hero h1 {
  margin: 22px auto 0;
  font-size: clamp(42px, 7vw, 82px);
  line-height: 0.98;
  letter-spacing: -0.04em;
  max-width: 900px;
}

.hero-lead {
  max-width: 880px;
  margin: 24px auto 0;
  font-size: clamp(20px, 2vw, 30px);
  line-height: 1.5;
  color: var(--muted);
}

.hero-text {
  max-width: 760px;
  margin: 18px auto 0;
  font-size: 17px;
  line-height: 1.9;
  color: var(--soft);
}

.hero-buttons {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
  margin-top: 34px;
}

.btn {
  display: inline-block;
  padding: 14px 24px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
  transition: transform 0.18s ease, background 0.18s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--blue);
  color: white;
}

.btn-secondary {
  background: white;
  color: var(--text);
  border: 1px solid var(--border);
}

.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  margin-top: 56px;
}

.card {
  background: var(--card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.stat-card {
  padding: 28px;
  text-align: left;
}

.stat-card h3 {
  margin: 0;
  font-size: 34px;
  line-height: 1;
  letter-spacing: -0.03em;
}

.stat-card p {
  margin: 10px 0 0;
  color: var(--soft);
  font-size: 14px;
}

.section {
  padding: 72px 0;
}

.section-tight {
  padding-top: 20px;
}

.two-col {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 24px;
}

.large-card {
  padding: 36px;
}

.section-label {
  margin: 0 0 8px;
  color: var(--blue);
  font-size: 14px;
  font-weight: 700;
}

.center {
  text-align: center;
}

.section h2,
.large-card h2,
.contact-card h2 {
  margin: 0;
  font-size: clamp(30px, 4vw, 54px);
  line-height: 1.08;
  letter-spacing: -0.04em;
}

.large-card p {
  color: var(--muted);
  font-size: 16px;
  line-height: 1.9;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.tags span {
  display: inline-block;
  padding: 11px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: #f7f7f9;
  font-size: 14px;
  color: rgba(0, 0, 0, 0.75);
}

.brands {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 16px;
  margin-top: 24px;
}

.brands div {
  text-align: center;
  padding: 22px 14px;
  border: 1px solid var(--border);
  border-radius: 22px;
  background: #fafafc;
  font-size: 14px;
  font-weight: 600;
  color: rgba(0, 0, 0, 0.66);
}

.section-head {
  margin-bottom: 28px;
}

.section-sub {
  max-width: 720px;
  margin: 14px auto 0;
  color: var(--soft);
  font-size: 16px;
  line-height: 1.8;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.project-card,
.case-card {
  padding: 30px;
  transition: transform 0.2s ease;
}

.project-card:hover {
  transform: translateY(-4px);
}

.project-tag {
  margin: 0 0 10px;
  color: var(--blue);
  font-size: 14px;
  font-weight: 700;
}

.project-card h3,
.case-card h3,
.exp-card h3,
.timeline-item h3 {
  margin: 0;
  font-size: 28px;
  line-height: 1.15;
  letter-spacing: -0.03em;
}

.project-card p,
.case-card p,
.exp-card p,
.timeline-item p {
  color: var(--muted);
  font-size: 15px;
  line-height: 1.9;
}

.project-link {
  display: inline-block;
  margin-top: 18px;
  font-size: 14px;
  font-weight: 700;
  color: rgba(0, 0, 0, 0.75);
}

.case-card ul {
  margin: 14px 0 0;
  padding-left: 18px;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.9;
}

.result-box {
  margin-top: 18px;
  padding: 16px 18px;
  background: #f5f5f7;
  border-radius: var(--radius-md);
  font-size: 15px;
  color: rgba(0, 0, 0, 0.76);
}

.metric {
  margin-top: 24px;
}

.metric > div:first-child {
  display: flex;
  justify-content: space-between;
  margin-bottom: 10px;
  font-size: 14px;
  color: var(--muted);
}

.metric strong {
  color: var(--text);
}

.bar {
  height: 10px;
  background: rgba(0, 0, 0, 0.06);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.bar div {
  height: 100%;
  background: var(--blue);
  border-radius: var(--radius-sm);
}

.timeline {
  margin-top: 28px;
  position: relative;
}

.timeline-item {
  position: relative;
  padding-left: 28px;
  margin-bottom: 28px;
  border-left: 1px solid rgba(0, 0, 0, 0.1);
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: -7px;
  top: 2px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: rgba(0, 113, 227, 0.16);
  border: 1px solid rgba(0, 113, 227, 0.35);
}

.year {
  display: inline-block;
  margin-bottom: 8px;
  color: var(--blue);
  font-size: 14px;
  font-weight: 700;
}

.experience-list {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.exp-card {
  padding: 28px 30px;
}

.exp-top {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: flex-start;
}

.exp-top p {
  margin: 6px 0 0;
}

.exp-top span {
  color: var(--blue);
  font-size: 14px;
  font-weight: 700;
}

.contact-card {
  padding: 50px 36px;
  text-align: center;
}

.contact-sub {
  max-width: 760px;
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-top: 34px;
}

.contact-box {
  display: block;
  text-align: left;
  padding: 22px;
  border: 1px solid var(--border);
  border-radius: 28px;
  background: #fafafc;
  transition: background 0.2s ease;
}

.contact-box:hover {
  background: #f2f2f5;
}

.contact-box span {
  display: block;
  color: var(--soft);
  font-size: 14px;
}

.contact-box strong {
  display: block;
  margin-top: 8px;
  font-size: 15px;
  color: rgba(0, 0, 0, 0.82);
  word-break: break-word;
}

@media (max-width: 1024px) {
  .stats,
  .grid-3,
  .contact-grid,
  .brands,
  .two-col {
    grid-template-columns: 1fr 1fr;
  }

  .brands {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 768px) {
  nav {
    display: none;
  }

  .hero-inner {
    padding: 72px 0 64px;
  }

  .stats,
  .grid-3,
  .contact-grid,
  .brands,
  .two-col {
    grid-template-columns: 1fr;
  }

  .large-card,
  .project-card,
  .case-card,
  .exp-card,
  .contact-card {
    padding: 24px;
  }

  .exp-top {
    flex-direction: column;
  }

  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }

  .btn {
    width: 100%;
    max-width: 320px;
    text-align: center;
  }
}