:root {
  --bg: #f6f8fc;
  --bg-2: #eef4ff;
  --ink: #16315a;
  --gold: #b8882e;
  --gold-2: #d4a84b;
  --cyan: #1a8f9c;
  --text: #1c2a3a;
  --muted: #5d6b7c;
  --line: rgba(22, 49, 90, 0.1);
  --glass: rgba(255, 255, 255, 0.86);
  --max: 1180px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
#contact { scroll-margin-top: 88px; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.75;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button, input, textarea { font-family: inherit; color: inherit; }

#fx { position: fixed; inset: 0; z-index: 0; pointer-events: none; }
.vignette {
  position: fixed; inset: 0; z-index: 1; pointer-events: none;
  background:
    radial-gradient(1000px 480px at 80% -8%, rgba(212, 168, 75, 0.16), transparent 55%),
    radial-gradient(800px 420px at -8% 30%, rgba(26, 143, 156, 0.1), transparent 50%);
}
.nav, .hero, .section, .footer { position: relative; z-index: 2; }

.wrap { width: min(var(--max), calc(100% - 40px)); margin: 0 auto; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  color: var(--gold);
  letter-spacing: 0.22em;
  font-size: 11px;
  font-weight: 700;
}
.pulse {
  width: 8px; height: 8px; border-radius: 50%; background: var(--cyan);
  box-shadow: 0 0 0 0 rgba(26, 143, 156, 0.45);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  70% { box-shadow: 0 0 0 10px rgba(26, 143, 156, 0); }
}
h1, h2, h3 {
  font-family: "Songti SC", "STSong", "Noto Serif SC", serif;
  font-weight: 700; line-height: 1.2; color: var(--ink);
}
.muted { color: var(--muted); }

.nav {
  position: sticky; top: 0; z-index: 20;
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(22, 49, 90, 0.08);
}
.nav.scrolled { box-shadow: 0 10px 32px rgba(22, 49, 90, 0.08); }
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 76px; gap: 20px; }
.brand { display: flex; align-items: center; gap: 12px; }
.brand img { width: 40px; height: 40px; border-radius: 10px; object-fit: cover; }
.brand strong { font-size: 20px; letter-spacing: 0.12em; color: var(--ink); }
.brand span { display: block; font-size: 10px; color: var(--gold); letter-spacing: 0.2em; }
.nav-links { display: flex; align-items: center; gap: 26px; font-size: 14px; }
.nav-links a { color: #3d5168; }
.nav-links a:hover { color: var(--ink); }
.nav-cta {
  background: linear-gradient(90deg, #b8882e, #e3c36a);
  color: #fff !important;
  font-weight: 700;
  padding: 9px 18px;
  border-radius: 999px;
  box-shadow: 0 8px 20px rgba(184, 136, 46, 0.28);
}
.nav-login {
  border: 1px solid rgba(22, 49, 90, 0.16);
  background: #fff;
  color: var(--ink) !important;
  font-weight: 600;
  padding: 8px 16px;
  border-radius: 999px;
}
.nav-login:hover {
  border-color: var(--gold);
  color: var(--gold) !important;
}
.menu-btn {
  display: none; width: 42px; height: 42px; border-radius: 10px;
  background: #fff; border: 1px solid var(--line); cursor: pointer;
}
.menu-btn span { display: block; width: 18px; height: 1.5px; background: var(--ink); margin: 5px auto; }

.hero {
  min-height: calc(100vh - 76px);
  padding: 48px 0 72px;
  display: flex; align-items: center;
  background: linear-gradient(180deg, #f8fbff 0%, #f3f6fb 55%, #eef3f8 100%);
}
.hero-grid-bg {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(22, 49, 90, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(22, 49, 90, 0.05) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(circle at 70% 40%, #000 18%, transparent 72%);
  animation: gridmove 18s linear infinite;
}
@keyframes gridmove { to { background-position: 64px 64px; } }
.hero-grid { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 36px; align-items: center; }
.hero h1 { font-size: clamp(38px, 5.4vw, 68px); margin: 18px 0; letter-spacing: 0.02em; }
.hero h1 em {
  font-style: normal;
  background: linear-gradient(90deg, #b8882e, #1a8f9c);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.lead { font-size: 18px; color: var(--muted); max-width: 34em; }
.hero-actions { display: flex; gap: 14px; margin-top: 32px; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 13px 24px; border-radius: 999px; font-weight: 700; cursor: pointer; border: 0;
  transition: transform 0.25s, box-shadow 0.25s;
}
.btn:hover { transform: translateY(-2px); }
.btn-gold {
  background: linear-gradient(90deg, #b8882e, #e3c36a);
  color: #fff;
  box-shadow: 0 10px 24px rgba(184, 136, 46, 0.25);
}
.btn-ghost {
  background: #fff;
  color: var(--ink);
  border: 1px solid rgba(22, 49, 90, 0.14);
}
.stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 48px; }
.stat { padding-top: 14px; border-top: 1px solid rgba(184, 136, 46, 0.35); }
.stat b { display: block; font-size: 28px; color: var(--ink); letter-spacing: 0.04em; }
.stat span { font-size: 13px; color: var(--muted); }

.hero-stage { position: relative; height: 540px; }
.core {
  position: absolute; inset: 40px 40px 80px;
  display: grid; place-items: center;
}
.ring {
  position: absolute; border-radius: 50%;
  border: 1px solid rgba(184, 136, 46, 0.35);
  box-shadow: inset 0 0 40px rgba(26, 143, 156, 0.06), 0 0 40px rgba(184, 136, 46, 0.08);
  background: rgba(255, 255, 255, 0.2);
}
.ring-1 { width: 220px; height: 220px; animation: spin 18s linear infinite; }
.ring-2 { width: 320px; height: 320px; border-style: dashed; background: transparent; animation: spin 28s linear infinite reverse; }
.ring-3 { width: 420px; height: 420px; opacity: 0.55; background: transparent; animation: spin 40s linear infinite; }
.axis {
  width: 2px; height: 70%;
  background: linear-gradient(to bottom, transparent, var(--gold), var(--cyan), transparent);
}
.core-label { position: relative; text-align: center; z-index: 2; }
.core-label img { width: 84px; height: 84px; margin: 0 auto 10px; border-radius: 20px; object-fit: cover; box-shadow: 0 12px 28px rgba(16, 36, 68, 0.18); }
.core-label span { display: block; color: var(--gold); font-size: 12px; letter-spacing: 0.18em; }
@keyframes spin { to { transform: rotate(360deg); } }

.float-card {
  position: absolute;
  min-width: 168px;
  padding: 14px 16px;
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid rgba(22, 49, 90, 0.08);
  border-radius: 14px;
  backdrop-filter: blur(16px);
  box-shadow: 0 16px 40px rgba(22, 49, 90, 0.1);
  animation: floaty 6s ease-in-out infinite;
}
.float-card small { display: block; color: var(--cyan); letter-spacing: 0.16em; font-size: 10px; }
.float-card b { display: block; margin: 4px 0 2px; color: var(--ink); }
.float-card span { color: var(--muted); font-size: 12px; }
.fc-1 { top: 36px; left: 0; animation-delay: 0s; }
.fc-2 { top: 70px; right: 0; animation-delay: 1.2s; }
.fc-3 { bottom: 48px; left: 18%; animation-delay: 0.6s; }
@keyframes floaty {
  50% { transform: translateY(-10px); }
}

.section { padding: 100px 0; background: #fff; }
.section.dim { background: #f3f7fb; }
.section-head { display: flex; gap: 24px; align-items: flex-start; margin-bottom: 40px; }
.section-head.center { flex-direction: column; align-items: center; text-align: center; }
.section-head h2 { font-size: clamp(30px, 4vw, 46px); margin-top: 8px; }
.idx {
  font-size: 13px; letter-spacing: 0.3em; color: var(--gold);
  border: 1px solid rgba(184, 136, 46, 0.35); padding: 8px 10px; border-radius: 8px; background: #fff;
}
.center .muted { max-width: 38em; margin: 12px auto 0; }

.pain-grid, .mod-grid, .adv-grid, .value-grid, .contact-grid { display: grid; gap: 22px; }
.pain-grid { grid-template-columns: 1fr 1fr; }
.glass {
  position: relative;
  background: var(--glass);
  border: 1px solid rgba(22, 49, 90, 0.08);
  border-radius: 22px;
  padding: 28px;
  overflow: hidden;
  box-shadow: 0 18px 40px rgba(22, 49, 90, 0.06);
}
.glass-top {
  position: absolute; left: 0; right: 0; top: 0; height: 3px;
  background: linear-gradient(90deg, transparent, var(--cyan), transparent);
}
.glass-top.gold { background: linear-gradient(90deg, transparent, var(--gold), transparent); }
.kicker { color: var(--cyan); letter-spacing: 0.22em; font-size: 11px; margin-bottom: 8px; }
.glass h3 { font-size: 28px; margin-bottom: 10px; }
.lux-list { margin-top: 18px; list-style: none; }
.lux-list li {
  position: relative; padding: 10px 0 10px 22px;
  border-bottom: 1px solid rgba(22, 49, 90, 0.08);
  color: #3d5168;
}
.lux-list li::before {
  content: ""; position: absolute; left: 0; top: 18px;
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--gold);
}

.mod-grid { grid-template-columns: 1fr 1fr; }
.engine-card {
  border-radius: 24px;
  padding: 8px;
  background: linear-gradient(180deg, rgba(26, 143, 156, 0.35), #fff 18%);
  box-shadow: 0 18px 40px rgba(22, 49, 90, 0.06);
}
.engine-card.gold { background: linear-gradient(180deg, rgba(184, 136, 46, 0.4), #fff 18%); }
.engine-card header, .engine-card ol {
  background: #fff;
  border-radius: 18px;
}
.engine-card header { padding: 28px 28px 18px; }
.engine-card header span { color: var(--cyan); letter-spacing: 0.2em; font-size: 11px; }
.engine-card.gold header span { color: var(--gold); }
.engine-card h3 { font-size: 30px; margin: 8px 0; }
.engine-card header p { color: var(--muted); }
.engine-card ol { list-style: none; padding: 8px 28px 24px; counter-reset: n; }
.engine-card li {
  counter-increment: n;
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 14px 0;
  border-top: 1px solid rgba(22, 49, 90, 0.08);
  color: var(--muted);
  font-size: 14px;
  line-height: 1.7;
}
.engine-card li::before {
  content: counter(n, decimal-leading-zero);
  flex: 0 0 36px;
  color: var(--gold);
  letter-spacing: 0.08em;
  font-size: 12px;
  padding-top: 4px;
}
.engine-card li > div {
  flex: 1;
  min-width: 0;
  overflow-wrap: break-word;
}
.engine-card li b { display: block; color: var(--ink); margin-bottom: 4px; font-size: 15px; line-height: 1.4; }
.engine-card li p { margin: 0; }

.adv-grid { grid-template-columns: repeat(3, 1fr); }
.adv {
  min-height: 210px; padding: 24px;
  border: 1px solid rgba(22, 49, 90, 0.08);
  border-radius: 20px;
  background: #fff;
  transition: transform 0.3s, border-color 0.3s, box-shadow 0.3s;
}
.adv:hover {
  transform: translateY(-6px);
  border-color: rgba(184, 136, 46, 0.45);
  box-shadow: 0 18px 36px rgba(22, 49, 90, 0.08);
}
.adv b { color: var(--gold); letter-spacing: 0.16em; font-size: 12px; }
.adv h3 { margin: 16px 0 8px; font-size: 22px; }
.adv p { color: var(--muted); }

.value-grid { grid-template-columns: 1fr 1fr; }
.value-panel {
  min-height: 250px; padding: 36px;
  border-radius: 24px; position: relative; overflow: hidden;
}
.value-panel span { letter-spacing: 0.24em; font-size: 12px; }
.value-panel h3 { font-size: 30px; margin: 16px 0 12px; }
.value-panel.in {
  background: radial-gradient(400px 200px at 0% 0%, rgba(26, 143, 156, 0.14), transparent 50%), #f3fbfd;
  border: 1px solid rgba(26, 143, 156, 0.22);
}
.value-panel.out {
  background: radial-gradient(400px 200px at 100% 0%, rgba(184, 136, 46, 0.16), transparent 50%), #fffaf0;
  border: 1px solid rgba(184, 136, 46, 0.28);
}
.value-panel p { color: var(--muted); max-width: 28em; }

.contact-grid { grid-template-columns: 0.9fr 1.1fr; }
.contact-item { padding: 16px 0; border-bottom: 1px solid rgba(22, 49, 90, 0.08); }
.contact-item:last-child { border-bottom: 0; }
.contact-item em { display: block; font-style: normal; color: var(--gold); letter-spacing: 0.16em; font-size: 12px; }
.phone { font-size: 22px; color: var(--ink); }
.qr {
  width: 140px; height: 140px; margin-top: 10px; border-radius: 12px;
  background: #fff; padding: 6px;
  box-shadow: 0 0 0 1px rgba(184, 136, 46, 0.28), 0 12px 24px rgba(22, 49, 90, 0.08);
}
form { display: grid; gap: 12px; margin-top: 16px; }
label { font-size: 12px; color: var(--muted); letter-spacing: 0.08em; }
input, textarea {
  width: 100%; margin-top: 6px;
  border: 1px solid rgba(22, 49, 90, 0.12);
  background: #fff;
  border-radius: 12px; padding: 12px 14px;
}
input:focus, textarea:focus {
  outline: none; border-color: rgba(184, 136, 46, 0.65);
  box-shadow: 0 0 0 3px rgba(184, 136, 46, 0.12);
}
textarea { min-height: 110px; resize: vertical; }
.form-msg { font-size: 14px; min-height: 1.4em; color: var(--cyan); }

.footer {
  background: #f3f6fb;
  border-top: 1px solid rgba(22, 49, 90, 0.08);
  color: var(--muted); padding: 40px 0 24px; font-size: 14px;
}
.footer strong { color: var(--ink); }
.footer-brand { display: flex; align-items: center; gap: 12px; }
.footer-brand img { width: 40px; height: 40px; border-radius: 10px; object-fit: cover; }
.footer-top { display: flex; justify-content: space-between; gap: 24px; flex-wrap: wrap; margin-bottom: 22px; }
.footer a { color: var(--gold); }
.beian { opacity: 0.8; font-size: 12px; }

.hero .reveal { opacity: 1; transform: none; }
.reveal { opacity: 0; transform: translateY(24px); animation: none; }
.reveal.show { opacity: 1; transform: none; transition: opacity 0.8s ease, transform 0.8s ease; }
.delay.show { transition-delay: 0.15s; }

@media (max-width: 900px) {
  .menu-btn { display: block; }
  .nav-links {
    display: none; position: absolute; left: 0; right: 0; top: 76px;
    background: rgba(255,255,255,0.98); flex-direction: column; padding: 18px 22px 28px;
    border-bottom: 1px solid rgba(22, 49, 90, 0.08);
  }
  .nav.open .nav-links { display: flex; }
  .hero-grid, .pain-grid, .mod-grid, .adv-grid, .value-grid, .contact-grid { grid-template-columns: 1fr; }
  .hero { min-height: auto; padding: 36px 0 48px; }
  .hero-stage { height: 420px; }
  .ring-3 { width: 280px; height: 280px; }
  .stats { grid-template-columns: 1fr; }
  .section { padding: 64px 0; }
  .section-head { flex-direction: column; }
}