:root {
  --bg: #f7f8f4;
  --bg-soft: #eef3ea;
  --ink: #12261c;
  --ink-soft: #3d5246;
  --muted: #6b7c70;
  --line: #d7e2d4;
  --accent: #1b7a43;
  --accent-hover: #145c32;
  --accent-soft: #e5f3e8;
  --accent-ink: #0f5a30;
  --green: #1b7a43;
  --max: 1120px;
  --header: 74px;
  --font: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --shadow: 0 14px 40px rgba(18, 38, 28, 0.08);
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: #fff;
  line-height: 1.75;
  min-height: 100vh;
}
img { max-width: 100%; display: block; }
a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); }
.wrap { width: min(100% - 2.4rem, var(--max)); margin-inline: auto; }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
#biz { scroll-margin-top: calc(var(--header) + 12px); }
.site-header {
  position: sticky; top: 0; z-index: 40;
  height: var(--header);
  background: rgba(247,248,244,.92);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
}
.site-header.scrolled { border-bottom-color: var(--line); box-shadow: 0 4px 20px rgba(18,38,28,.05); background: rgba(255,255,255,.94); }
.nav { display: flex; align-items: center; gap: .4rem; height: var(--header); }
.brand { display: flex; align-items: center; gap: .65rem; color: var(--ink); font-weight: 760; letter-spacing: 0; font-size: 1.12rem; }
.brand:hover { color: var(--ink); }
.logo { width: 36px; height: 36px; border-radius: 10px; display: block; flex: none; }
.brand-text { display: flex; flex-direction: column; line-height: 1.05; }
.brand-text small { display: block; margin-top: .16rem; font-size: .68rem; font-weight: 560; letter-spacing: .08em; color: var(--muted); }
.nav-links { display: flex; align-items: center; gap: .15rem; list-style: none; margin: 0 0 0 .6rem; padding: 0; }
.nav-links a, .drop > button {
  display: inline-flex; align-items: center; gap: .28rem; padding: .45rem .78rem; color: var(--ink-soft);
  background: none; border: 0; font: inherit; font-weight: 620; cursor: pointer; border-radius: 8px;
}
.nav-links a:hover, .drop:hover > button, .drop.open > button { color: var(--accent-ink); background: var(--accent-soft); }
.nav-links a[aria-current="page"] { color: var(--accent-ink); background: #fff; box-shadow: inset 0 0 0 1px var(--line); }
.drop { position: relative; }
.drop > button::after {
  content: ""; width: 6px; height: 6px; border-right: 1.6px solid currentColor; border-bottom: 1.6px solid currentColor;
  transform: rotate(45deg) translateY(-1px); opacity: .65;
}
.menu {
  display: none; position: absolute; top: calc(100% + .35rem); left: 0; min-width: 248px;
  padding: .4rem; background: #fff; border: 1px solid var(--line); border-radius: 14px;
  box-shadow: var(--shadow); list-style: none; margin: 0;
}
.drop:hover .menu, .drop.open .menu, .drop:focus-within .menu { display: block; }
.menu a { border-radius: 10px; display: block; }
.menu a small { display: block; color: var(--muted); font-size: .75rem; font-weight: 500; margin-top: .05rem; }
.nav-cta { margin-left: auto; border-radius: 999px; }
@media (min-width: 861px) {
  .nav-links { margin-left: .85rem; background: var(--bg-soft); border-radius: 999px; padding: 4px; gap: 2px; }
  .nav-links > li > a, .drop > button { border-radius: 999px; }
  .nav-links a[aria-current="page"] { background: #fff; box-shadow: 0 1px 2px rgba(18,38,28,.08); }
}
.burger { display: none; margin-left: auto; width: 42px; height: 42px; border: 0; background: none; cursor: pointer; }
.burger span { display: block; height: 2px; margin: 6px 8px; background: var(--ink); }

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 48px; padding: .7rem 1.15rem; border-radius: 8px;
  font-weight: 650; border: 1px solid transparent;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); color: #fff; }
.btn-ghost { background: #fff; color: var(--ink); border-color: var(--line); }
.btn-ghost:hover { color: var(--ink); background: var(--bg-soft); }

.hero {
  background:
    radial-gradient(880px 420px at 8% -10%, #e5f3e4 0%, transparent 62%),
    linear-gradient(180deg, var(--bg) 0%, #fff 78%);
  padding: 4.2rem 0 2.2rem;
}
.eyebrow { margin: 0 0 .8rem; color: var(--accent); letter-spacing: .14em; font-size: .78rem; font-weight: 700; }
.hero h1 { margin: 0; font-size: clamp(2.1rem, 4.6vw, 3.35rem); line-height: 1.18; letter-spacing: -.03em; font-weight: 760; }
.hero h1 .mark { color: var(--green); }
.lead { max-width: 40rem; color: var(--ink-soft); font-size: 1.05rem; margin: 1rem 0 1.4rem; }
.hero-actions { display: flex; flex-wrap: wrap; gap: .7rem; }
.chips { display: flex; flex-wrap: wrap; gap: .55rem; margin-top: 1.2rem; }
.chip { border: 1px solid var(--line); background: #fff; border-radius: 8px; padding: .35rem .7rem; color: var(--ink-soft); font-size: .9rem; }
a.chip:hover { color: var(--accent-ink); border-color: #c5dcc8; background: var(--accent-soft); }

.section { padding: 3.2rem 0; }
.section h2 { margin: 0 0 .4rem; font-size: 1.7rem; letter-spacing: -.02em; }
.sub { color: var(--muted); margin: 0 0 1.4rem; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; border: 1px solid var(--line); border-radius: 16px; overflow: hidden; background: #fff; }
.prod { display: grid; grid-template-columns: 92px 1fr; gap: .2rem 1rem; padding: 1.4rem 1.3rem; color: inherit; }
.prod + .prod { border-left: 1px solid var(--line); }
.prod:hover { background: #fbfcf8; color: inherit; }
.prod h3 { margin: .15rem 0 .25rem; font-size: 1.2rem; }
.prod p { margin: 0; color: var(--muted); }
.prod .more { display: inline-block; margin-top: .65rem; color: var(--accent); font-weight: 650; }
.kicker { color: var(--muted); font-size: .75rem; letter-spacing: .12em; font-weight: 700; }
.ico { width: 46px; height: 46px; }

.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 1rem; }
.card { border: 1px solid var(--line); border-radius: 14px; padding: 1.2rem 1.25rem; background: #fff; }
.card h3 { margin: 0 0 .35rem; }
.card p { margin: 0; color: var(--ink-soft); }
.card .more { display: inline-block; margin-top: .7rem; font-weight: 650; }

.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.step { background: var(--bg-soft); border-radius: 14px; padding: 1.15rem 1.15rem 1.25rem; }
.step b { display: block; color: var(--accent); font-size: .78rem; letter-spacing: .08em; }
.step h3 { margin: .35rem 0 .3rem; font-size: 1.05rem; }
.step p { margin: 0; color: var(--ink-soft); }

.notes { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line); }
.notes a { display: flex; justify-content: space-between; align-items: baseline; gap: .8rem 1.2rem; padding: .85rem 0; border-bottom: 1px solid var(--line); color: var(--ink); }
.notes a:hover { color: var(--accent); }
.notes time { color: var(--muted); font-size: .85rem; white-space: nowrap; }

.services { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: .8rem; }
.svc { display: block; border: 1px solid var(--line); border-radius: 14px; padding: 1rem 1rem 1.1rem; color: inherit; min-height: 132px; }
.svc:hover { border-color: #c5dcc8; color: inherit; background: #fbfcf8; }
.svc strong { display: block; margin-bottom: .25rem; }
.svc span { color: var(--muted); font-size: .92rem; }

.faq details { border-bottom: 1px solid var(--line); padding: .85rem 0; }
.faq summary { cursor: pointer; font-weight: 680; list-style: none; display: flex; justify-content: space-between; gap: 1rem; align-items: center; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--muted); font-weight: 500; }
.faq details[open] summary::after { content: "–"; }
.faq p { margin: .45rem 0 0; color: var(--ink-soft); }

.page-hero { padding: 2.6rem 0 1rem; background: linear-gradient(180deg, var(--bg), #fff); }
.page-hero h1 { margin: .2rem 0 .5rem; font-size: clamp(1.8rem, 3vw, 2.5rem); letter-spacing: -.03em; line-height: 1.2; }
.crumbs { color: var(--muted); font-size: .88rem; }
.prose { max-width: 760px; }
.page-hero .wrap.prose { max-width: var(--max); }
.page-hero .wrap.prose h1,
.page-hero .wrap.prose .lead,
.page-hero .wrap.prose p,
.page-hero .wrap.prose .cta-band { max-width: 760px; }
.prose h2 { font-size: 1.25rem; margin: 1.6rem 0 .4rem; }
.prose p, .prose li { color: var(--ink-soft); }
.check { padding-left: 1.1rem; }
.cta-band { margin: 2rem 0 0; padding: 1.3rem 1.3rem; border-radius: 14px; background: var(--accent-soft); }
.related { margin-top: 2rem; }
.back { display: inline-block; margin-bottom: .7rem; color: var(--muted); font-size: .92rem; }
.note-list a { display: block; padding: 1.05rem 0; border-bottom: 1px solid var(--line); color: inherit; }
.note-list a:hover strong { color: var(--accent); }
.note-list time { color: var(--muted); font-size: .82rem; }
.note-list strong { display: block; margin: .15rem 0 .25rem; font-size: 1.08rem; letter-spacing: -.02em; }
.note-list span { color: var(--ink-soft); }
.pager { display: flex; flex-wrap: wrap; gap: .4rem; align-items: center; margin-top: 1.3rem; }
.pager a, .pager span { min-width: 2.3rem; text-align: center; padding: .35rem .75rem; border: 1px solid var(--line); border-radius: 8px; color: var(--ink-soft); }
.pager .on { background: var(--accent); color: #fff; border-color: var(--accent); }
.pager a:hover { color: var(--accent-ink); }

.site-footer { border-top: 1px solid var(--line); padding: 2.4rem 0 1.4rem; margin-top: 1rem; color: var(--muted); font-size: .92rem; }
.foot { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 1.2rem; }
.site-footer h3 { margin: 0 0 .45rem; color: var(--ink); font-size: .95rem; }
.site-footer ul { list-style: none; margin: 0; padding: 0; }
.site-footer a { color: var(--ink-soft); }
.legal { margin-top: 1.4rem; font-size: .8rem; }

.float-tg {
  display: none; position: fixed; right: 16px; bottom: 16px; z-index: 30;
  background: var(--accent); color: #fff; border-radius: 999px; padding: .7rem 1rem; font-weight: 700;
  box-shadow: var(--shadow);
}
.float-tg:hover { color: #fff; }

@media (max-width: 860px) {
  .burger { display: block; }
  .nav-cta { display: none; }
  .nav-links {
    display: none; position: absolute; left: 0; right: 0; top: var(--header);
    flex-direction: column; align-items: stretch; background: #fff;
    border-bottom: 1px solid var(--line); margin: 0; padding: .4rem .8rem 1rem;
    max-height: calc(100vh - var(--header)); overflow: auto;
  }
  .nav-links.open { display: flex; background: #fff; border-radius: 0; padding: .4rem .8rem 1rem; }
  .nav-links a, .drop > button { border-radius: 10px; padding: .7rem .8rem; }
  .menu { position: static; box-shadow: none; border: 0; border-radius: 0; padding: 0 0 .3rem .4rem; display: none; min-width: 0; }
  .drop.open .menu, .drop:focus-within .menu { display: block; }
  .grid-2, .steps, .foot { grid-template-columns: 1fr; }
  .prod + .prod { border-left: 0; border-top: 1px solid var(--line); }
  .hero { padding: 2.4rem 0 1.4rem; }
  .section { padding: 2.2rem 0; }
  .notes a { flex-direction: column; gap: .1rem; }
  .float-tg.show { display: inline-flex; }
  body.has-float { padding-bottom: 84px; }
}