:root {
  --bg: #05060a;
  --text: #eef1f8;
  --muted: #79829c;
  --line: rgba(130, 160, 255, 0.12);
  --cyan: #28e6ff;
  --violet: #9b6cff;
  --grad: linear-gradient(105deg, #28e6ff 0%, #6f9cff 48%, #b673ff 100%);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  font-weight: 300;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

#bg { position: fixed; inset: 0; z-index: 0; pointer-events: none; }
.nav, main, .footer { position: relative; z-index: 1; }
a { color: inherit; text-decoration: none; }

/* 导航 */
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 26px 7vw;
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 10;
  backdrop-filter: blur(12px);
  background: rgba(5, 6, 10, 0.4);
}
.logo { display: flex; align-items: center; gap: 12px; }
.logo-mark {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 18px;
  font-weight: 800;
  letter-spacing: 1px;
  line-height: 1;
}
.logo-mark .grad { transition: filter .3s; }
.logo-dot {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 8px var(--cyan);
  align-self: flex-end;
  margin-bottom: 3px;
  transition: box-shadow .3s, transform .3s;
}
.logo:hover .logo-mark .grad { filter: brightness(1.15); }
.logo:hover .logo-dot { box-shadow: 0 0 14px var(--cyan); transform: scale(1.25); }
.logo-domain { font-size: 13px; color: var(--muted); letter-spacing: 1px; }
.logo-domain .dot { color: var(--cyan); }
.nav-right { display: flex; align-items: center; gap: 26px; }
.nav-link { color: var(--muted); font-size: 14px; letter-spacing: 2px; transition: color .3s; }
.nav-link:hover { color: var(--text); }
.lang-btn {
  background: transparent;
  border: 1px solid var(--line);
  color: var(--text);
  border-radius: 999px;
  padding: 6px 14px;
  font-size: 12px;
  letter-spacing: 1px;
  cursor: pointer;
  transition: border-color .3s, color .3s;
}
.lang-btn:hover { border-color: var(--cyan); color: var(--cyan); }

.grad {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.btn {
  display: inline-block;
  margin-top: 48px;
  padding: 13px 30px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--text);
  font-size: 14px;
  letter-spacing: 2px;
  transition: border-color .3s, transform .3s, color .3s;
}
.btn:hover { border-color: var(--cyan); color: var(--cyan); transform: translateY(-2px); }

/* 首屏 */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 0 7vw;
}
.eyebrow {
  font-size: 13px;
  letter-spacing: 8px;
  color: var(--muted);
  margin-bottom: 34px;
}
.hero-title {
  font-size: clamp(56px, 14vw, 160px);
  font-weight: 600;
  letter-spacing: 6px;
  line-height: 1;
}
.hero-title-en {
  display: block;
  margin-top: 20px;
  font-size: clamp(13px, 1.7vw, 20px);
  font-weight: 300;
  letter-spacing: 8px;
  text-transform: uppercase;
  color: var(--muted);
}
.hero-sub {
  margin-top: 30px;
  font-size: clamp(16px, 2.2vw, 22px);
  color: var(--muted);
  letter-spacing: 3px;
}

/* 通用区块：大留白 */
section { padding: 16vh 7vw; }

/* 理念一句话 */
.statement {
  min-height: 80vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
}
.statement-text {
  max-width: 1040px;
  font-size: clamp(19px, 2.8vw, 32px);
  font-weight: 300;
  line-height: 1.8;
  letter-spacing: 1px;
}

/* 三态 */
.states { max-width: 1120px; margin: 0 auto; text-align: center; }
.states-title {
  font-size: clamp(24px, 3.4vw, 38px);
  font-weight: 400;
  letter-spacing: 6px;
  margin-bottom: 9vh;
}
.states-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 7vw;
}
.state { position: relative; padding-top: 20px; text-align: left; }
.state-index {
  font-size: 13px;
  letter-spacing: 3px;
  color: var(--muted);
}
.state-glyph {
  font-size: 44px;
  margin: 22px 0 18px;
  background: var(--grad);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.state h3 { font-size: 20px; font-weight: 500; letter-spacing: 2px; margin-bottom: 12px; }
.state p { color: var(--muted); font-size: 15px; letter-spacing: 1px; }

/* 金句 */
.quote {
  min-height: 70vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
}
.quote p {
  font-size: clamp(20px, 3.4vw, 38px);
  font-weight: 400;
  letter-spacing: 2px;
  line-height: 1.5;
  max-width: 1000px;
}

/* 页脚 */
.footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  padding: 40px 7vw;
  border-top: 1px solid var(--line);
}
.footer-copy { color: var(--muted); font-size: 13px; letter-spacing: 1px; }

/* 响应式 */
@media (max-width: 820px) {
  .nav-link { display: none; }
  .states-grid { grid-template-columns: 1fr; gap: 7vh; }
  .state { text-align: center; }
}

/* 进入动画 */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 1s ease, transform 1s ease;
}
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
}