:root {
  --ink: #101820;
  --ink-2: #2a3644;
  --muted: #667584;
  --paper: #f5f4f0;
  --sand: #ebe6dc;
  --teal: #0f766e;
  --teal-bright: #0d9488;
  --amber: #c2410c;
  --line: rgba(16, 24, 32, 0.12);
  --max: 1080px;
  --sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --serif: "Noto Serif SC", "Songti SC", serif;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--sans);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
.wrap { width: min(100% - 2.4rem, var(--max)); margin-inline: auto; }

.site-nav {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(12, 18, 24, 0.94);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(255,255,255,0.08);
  color: #fff;
}
.site-nav .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 56px;
  flex-wrap: wrap;
  padding-block: 0.4rem;
}
.site-nav .logo {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  font-family: var(--serif);
  font-size: 1.02rem;
  font-weight: 700;
  white-space: nowrap;
}
.site-nav .logo small {
  font-family: var(--sans);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  color: rgba(255,255,255,0.42);
}
.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.9rem;
  color: rgba(255,255,255,0.72);
}
.nav-links a:hover { color: #5eead4; }
.nav-links a.is-cta {
  color: #0b1216;
  background: #5eead4;
  padding: 0.28rem 0.8rem;
  border-radius: 999px;
  font-weight: 600;
}

.crumb {
  background: #fff;
  border-bottom: 1px solid var(--line);
  font-size: 0.82rem;
  color: var(--muted);
}
.crumb .wrap { padding: 0.6rem 0; }
.crumb a:hover { color: var(--teal); }

.hero {
  color: #fff;
  background:
    radial-gradient(820px 460px at 85% 15%, rgba(13, 148, 136, 0.28), transparent 55%),
    radial-gradient(640px 420px at 8% 90%, rgba(15, 118, 110, 0.3), transparent 52%),
    linear-gradient(165deg, #0c1218 0%, #12252a 60%, #0e1a1f 100%);
}
.hero .wrap { padding: clamp(3rem, 7vw, 4.75rem) 0 clamp(2.6rem, 6vw, 4rem); }
.hero .eyebrow {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: #5eead4;
  margin-bottom: 0.85rem;
}
.hero h1 {
  font-family: var(--serif);
  font-size: clamp(1.8rem, 4.2vw, 2.65rem);
  font-weight: 700;
  line-height: 1.28;
  max-width: 18em;
}
.hero .lead {
  margin-top: 1rem;
  font-size: clamp(1rem, 1.4vw, 1.1rem);
  color: rgba(255,255,255,0.75);
  max-width: 42em;
}
.hero-links { margin-top: 1.8rem; display: flex; flex-wrap: wrap; gap: 0.7rem; }
.btn {
  display: inline-flex;
  align-items: center;
  padding: 0.72rem 1.35rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.94rem;
}
.btn-main { background: var(--teal-bright); color: #fff; }
.btn-ghost { border: 1px solid rgba(255,255,255,0.3); color: #fff; }

section { padding: clamp(3rem, 6.5vw, 4.5rem) 0; }
section[id] { scroll-margin-top: 64px; }
.kicker {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  color: var(--teal);
  margin-bottom: 0.6rem;
}
.title {
  font-family: var(--serif);
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  line-height: 1.32;
  max-width: 21em;
}
.desc { margin-top: 0.8rem; color: var(--muted); font-size: 1.01rem; max-width: 46em; }

.pain { background: #fff; border-block: 1px solid var(--line); }
.pain-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  margin-top: 2rem;
}
.pain-item { background: #fff; padding: 1.4rem 1.3rem; }
.pain-item h3 { font-size: 1.05rem; margin-bottom: 0.4rem; }
.pain-item p { color: var(--muted); font-size: 0.93rem; }

.cap { background: var(--paper); }
.cap-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.1rem;
  margin-top: 2rem;
}
.cap-card {
  background: #fff;
  border: 1px solid var(--line);
  border-left: 3px solid var(--teal-bright);
  padding: 1.25rem 1.3rem;
}
.cap-card h3 { font-size: 1.08rem; margin-bottom: 0.45rem; }
.cap-card p { color: var(--muted); font-size: 0.93rem; }

.shot-sec { background: var(--ink); color: #fff; }
.shot-sec .kicker { color: #5eead4; }
.shot-sec .desc { color: rgba(255,255,255,0.62); }
.shot {
  margin-top: 2rem;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.12);
  overflow: hidden;
}
.shot img { display: block; width: 100%; height: auto; border-bottom: 1px solid rgba(255,255,255,0.1); }
.shot figcaption { padding: 0.9rem 1.1rem 1.1rem; }
.shot figcaption strong { display: block; font-family: var(--serif); font-size: 1.02rem; margin-bottom: 0.25rem; }
.shot figcaption span { font-size: 0.88rem; color: rgba(255,255,255,0.6); }

.link-sec { background: #fff; border-block: 1px solid var(--line); }
.link-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.1rem; margin-top: 1.9rem; }
.link-card {
  display: block;
  background: var(--paper);
  border: 1px solid var(--line);
  padding: 1.2rem 1.3rem;
  transition: border-color 0.15s, transform 0.15s;
}
.link-card:hover { border-color: var(--teal); transform: translateY(-2px); }
.link-card strong { display: block; font-size: 1.05rem; margin-bottom: 0.3rem; }
.link-card span { color: var(--muted); font-size: 0.92rem; }
.link-card .go { color: var(--teal); font-size: 0.88rem; font-weight: 600; }

.faq { background: var(--paper); }
.faq-list { margin-top: 1.8rem; border-top: 1px solid var(--line); }
.faq-item { border-bottom: 1px solid var(--line); }
.faq-item summary {
  cursor: pointer;
  list-style: none;
  padding: 1rem 2rem 1rem 0;
  font-weight: 600;
  font-size: 1rem;
  position: relative;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 0.3rem;
  top: 0.9rem;
  font-size: 1.3rem;
  color: var(--teal);
}
.faq-item[open] summary::after { content: "\2212"; }
.faq-item p { padding: 0 0 1.1rem; color: var(--muted); font-size: 0.95rem; max-width: 52em; }

.cta {
  background: linear-gradient(160deg, #0f766e 0%, #0b3d3a 100%);
  color: #fff;
  text-align: center;
}
.cta .title { margin-inline: auto; color: #fff; }
.cta .desc { margin-inline: auto; color: rgba(255,255,255,0.8); }
.cta .kicker { color: #99f6e4; }
.cta-wx {
  font-family: var(--serif);
  font-size: clamp(1.7rem, 3.6vw, 2.3rem);
  font-weight: 700;
  letter-spacing: 0.06em;
  margin: 1rem 0 0.4rem;
  user-select: all;
}
.cta-links { margin-top: 1.3rem; }
.cta-links a { color: #99f6e4; }
.cta-btns { margin-top: 1.5rem; display: flex; justify-content: center; flex-wrap: wrap; gap: 0.7rem; }

footer {
  padding: 1.4rem 0 2.2rem;
  background: #0a1014;
  color: rgba(255,255,255,0.4);
  font-size: 0.83rem;
  text-align: center;
}
footer a { color: rgba(255,255,255,0.58); margin: 0 0.45rem; }

@media (max-width: 860px) {
  .pain-grid, .cap-grid, .link-grid { grid-template-columns: 1fr; }
}