:root {
  --bg: #ffffff;
  --bg-2: #f7f8fa;
  --card: #ffffff;
  --line: #e8eaef;
  --text: #12141a;
  --muted: #5c6573;
  --teal: #0f766e;
  --teal-2: #0d9488;
  --blue: #2563eb;
  --max: 1120px;
}

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

img { max-width: 100%; display: block; }

.wrap {
  width: min(var(--max), calc(100% - 40px));
  margin: 0 auto;
}

.nav {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(18px);
  background: rgba(255, 255, 255, 0.92);
  border-bottom: 1px solid var(--line);
}

.nav-inner {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  letter-spacing: 0.08em;
}

.brand img {
  width: 36px;
  height: 36px;
  border-radius: 10px;
}

.brand small {
  display: block;
  color: var(--muted);
  font-size: 11px;
  letter-spacing: 0.18em;
  font-weight: 500;
}

.nav-links {
  display: flex;
  gap: 28px;
  color: var(--muted);
  font-size: 14px;
}

.nav-links a:hover { color: var(--text); }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 42px;
  padding: 0 18px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-size: 14px;
  cursor: pointer;
}

.btn-primary {
  background: var(--teal);
  color: #ffffff;
  font-weight: 600;
}

.btn-primary:hover { background: #0b5f59; color: #ffffff; }

.btn-ghost {
  border-color: var(--line);
  color: var(--text);
  background: transparent;
}

.hero {
  position: relative;
  min-height: auto;
  display: grid;
  align-items: center;
  overflow: hidden;
}

.hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 36px;
  align-items: center;
  padding: 72px 0 56px;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(900px 420px at 88% 0%, rgba(13, 148, 136, 0.10), transparent 58%),
    radial-gradient(640px 360px at 0% 100%, rgba(37, 99, 235, 0.06), transparent 55%),
    #ffffff;
}

.hero-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(15, 23, 42, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(15, 23, 42, 0.04) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(180deg, rgba(0,0,0,0.35), transparent 85%);
}

.hero-copy {
  position: relative;
  padding: 0;
}

.media {
  margin: 0;
  border-radius: 20px;
  overflow: hidden;
  border: 1px solid var(--line);
  background: #fff;
  box-shadow: 0 18px 40px rgba(16, 24, 40, 0.08);
}

.media img,
.media video {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
  aspect-ratio: 4 / 3;
}

.hero .media video { aspect-ratio: 16 / 9; }

.card-img {
  width: calc(100% + 44px);
  max-width: none;
  margin: -22px -22px 16px;
  height: 168px;
  object-fit: cover;
  border-bottom: 1px solid var(--line);
}

.eyebrow {
  color: var(--teal);
  letter-spacing: 0.22em;
  font-size: 12px;
  text-transform: uppercase;
}

.hero h1 {
  margin: 14px 0 16px;
  font-size: clamp(36px, 6vw, 68px);
  line-height: 1.12;
  font-weight: 600;
  letter-spacing: 0.02em;
  max-width: 14em;
}

.hero p {
  max-width: 560px;
  color: var(--muted);
  font-size: 17px;
}

.hero-actions {
  display: flex;
  gap: 12px;
  margin-top: 28px;
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 28px;
}

.chips a {
  height: 34px;
  padding: 0 12px;
  border-radius: 999px;
  border: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
  display: inline-flex;
  align-items: center;
}

.chips a:hover { color: var(--teal); border-color: #b7e2dc; }

.band { background: var(--bg-2); }

.feature {
  display: grid;
  grid-template-columns: 1.35fr 0.85fr;
  gap: 36px;
  align-items: start;
}

.ticks {
  margin: 18px 0 24px;
  padding: 0;
  list-style: none;
}

.ticks li {
  position: relative;
  padding: 8px 0 8px 22px;
  color: var(--muted);
}

.ticks li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 16px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--teal-2);
}

.note {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 22px;
}

.note h3 { margin: 0 0 6px; font-size: 16px; }
.note p { margin: 0 0 16px; color: var(--muted); }
.note p:last-child { margin-bottom: 0; }

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

.faq details {
  border-top: 1px solid var(--line);
  padding: 16px 0;
}

.faq summary {
  cursor: pointer;
  font-weight: 600;
}

.faq details p {
  margin: 8px 0 0;
  color: var(--muted);
}

.muted { color: var(--muted); }

section { padding: 88px 0; }

.section-head {
  max-width: 640px;
  margin-bottom: 40px;
}

.section-head h2 {
  margin: 8px 0 12px;
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 600;
}

.section-head p { color: var(--muted); margin: 0; }

.tabs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 22px;
}

.tab {
  height: 40px;
  padding: 0 16px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--muted);
  cursor: pointer;
}

.tab.active {
  color: #fff;
  background: var(--teal);
  border-color: var(--teal);
}

.panel {
  display: none;
  border: 1px solid var(--line);
  background: var(--card);
  border-radius: 20px;
  padding: 28px;
}

.panel.active { display: block; }

.panel h3 { margin: 0 0 8px; font-size: 22px; }
.panel p { margin: 0; color: var(--muted); max-width: 62ch; }

.studio {
  border-radius: 24px;
  overflow: hidden;
  border: 1px solid var(--line);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 22px;
  overflow: hidden;
}

.card .num {
  color: var(--teal);
  font-size: 13px;
  letter-spacing: 0.16em;
}

.card h3 { margin: 10px 0 8px; font-size: 20px; }
.card p { margin: 0; color: var(--muted); }

.stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.stat {
  padding: 28px 22px;
  border-top: 1px solid var(--line);
}

.stat b {
  display: block;
  font-size: 34px;
  font-weight: 600;
  color: var(--teal);
}

.stat span { color: var(--muted); font-size: 14px; }

.split {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 40px;
  align-items: start;
}

.contact {
  background: #ffffff;
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 28px;
}

.contact .mail { color: var(--teal); font-weight: 600; }

.contact .btn-primary,
.contact a.btn-primary {
  color: #ffffff;
  margin-top: 8px;
}

.footer {
  border-top: 1px solid var(--line);
  padding: 28px 0 40px;
  color: var(--muted);
  font-size: 13px;
  display: flex;
  justify-content: space-between;
  gap: 12px;
}

.menu-btn {
  display: none;
  width: 40px;
  height: 40px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: transparent;
  color: var(--text);
}

@media (max-width: 860px) {
  .grid-3, .grid-4, .stats, .split, .feature, .hero-grid { grid-template-columns: 1fr; }
  .nav-links, .nav .btn { display: none; }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    background: #fff;
    padding: 16px 20px 20px;
    border-bottom: 1px solid var(--line);
  }
  .menu-btn { display: grid; place-items: center; }
  .hero { min-height: 78vh; }
}