:root {
  --bg: #f5f7fa;
  --ink: #17202f;
  --muted: #667085;
  --line: #dce4ee;
  --panel: #ffffff;
  --panel-soft: #f9fbfd;
  --green: #16846f;
  --blue: #1f6feb;
  --amber: #a86405;
  --dark: #10201f;
  --shadow: 0 24px 70px rgba(23, 32, 47, .12);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.7;
  letter-spacing: 0;
}
a { color: inherit; text-decoration: none; }
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 14px clamp(18px, 5vw, 72px);
  background: rgba(255,255,255,.88);
  border-bottom: 1px solid rgba(220,228,238,.86);
  backdrop-filter: saturate(145%) blur(14px);
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand-mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 8px;
  background: var(--dark);
  color: #fff;
  font-weight: 900;
}
.brand strong { display: block; font-size: 15px; }
.brand small { display: block; color: var(--muted); font-size: 12px; }
nav { display: flex; gap: 18px; flex-wrap: wrap; color: #475467; font-size: 14px; }
nav a { border-bottom: 1px solid transparent; }
nav a:hover { border-color: currentColor; color: var(--dark); }
.hero {
  position: relative;
  min-height: calc(100vh - 64px);
  overflow: hidden;
  display: flex;
  align-items: center;
  padding: clamp(60px, 8vw, 118px) clamp(20px, 6vw, 92px);
  background: #eef5f2;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(90deg, rgba(245,247,250,.96) 0%, rgba(245,247,250,.86) 35%, rgba(245,247,250,.18) 70%, rgba(245,247,250,.06) 100%);
}
.hero-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 58% center;
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 760px;
}
.hero h1 {
  margin: 10px 0 18px;
  font-size: clamp(48px, 8vw, 96px);
  line-height: 1;
  font-weight: 900;
  letter-spacing: 0;
}
.hero-copy {
  max-width: 720px;
  font-size: clamp(18px, 2.05vw, 25px);
  color: #24352f;
}
.eyebrow {
  margin: 0;
  color: var(--green);
  font-weight: 900;
  font-size: 13px;
}
.hero-actions { display: flex; gap: 12px; margin-top: 30px; flex-wrap: wrap; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 10px 18px;
  border-radius: 8px;
  border: 1px solid var(--dark);
  font-weight: 800;
}
.button.primary { background: var(--dark); color: #fff; }
.button.ghost { background: rgba(255,255,255,.76); color: var(--dark); }
.hero-tags, .keyword-row { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 22px; }
.hero-tags span, .keyword-row span {
  border: 1px solid rgba(16,32,31,.16);
  background: rgba(255,255,255,.74);
  border-radius: 999px;
  padding: 6px 12px;
  color: #24352f;
  font-size: 13px;
  font-weight: 700;
}
.content-band, .workflow { max-width: 1180px; margin: 0 auto; padding: 78px 20px; }
.section-head { max-width: 760px; margin-bottom: 30px; }
.section-head h2, .page-hero h1 {
  margin: 0 0 10px;
  font-size: clamp(29px, 4vw, 48px);
  line-height: 1.14;
  letter-spacing: 0;
}
.section-head p, .page-hero p { margin: 0; color: var(--muted); font-size: 17px; }
.card-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.info-card {
  position: relative;
  overflow: hidden;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 22px;
  min-height: 168px;
  box-shadow: 0 12px 32px rgba(23, 32, 47, .05);
}
.info-card::before {
  content: "";
  display: block;
  width: 34px;
  height: 4px;
  margin-bottom: 18px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--green), var(--blue));
}
.info-card h3 { margin: 0 0 8px; font-size: 19px; }
.info-card p { margin: 0; color: var(--muted); }
.workflow {
  max-width: none;
  background: #fff;
  border-block: 1px solid var(--line);
}
.workflow .section-head, .workflow ol { max-width: 1180px; margin-left: auto; margin-right: auto; }
.workflow ol {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  padding: 0 20px;
  list-style: none;
  counter-reset: step;
}
.workflow li {
  counter-increment: step;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 20px;
  background: var(--panel-soft);
}
.workflow li::before {
  content: counter(step);
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 8px;
  background: var(--green);
  color: #fff;
  font-weight: 900;
  margin-bottom: 12px;
}
.workflow b, .workflow span { display: block; }
.workflow span { color: var(--muted); margin-top: 6px; }
.faq-list { display: grid; gap: 10px; }
.faq-list details {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 17px 18px;
}
.faq-list summary { cursor: pointer; font-weight: 900; }
.faq-list p { margin: 10px 0 0; color: var(--muted); }
.page-hero {
  position: relative;
  overflow: hidden;
  padding: 88px 20px 76px;
  border-bottom: 1px solid var(--line);
  background: radial-gradient(circle at 50% 0%, rgba(22,132,111,.12), transparent 34%), linear-gradient(180deg, #fff 0%, #f5f7fa 100%);
  max-width: none;
}
.page-hero::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -48px;
  width: min(760px, 78vw);
  height: 96px;
  transform: translateX(-50%);
  border-radius: 999px;
  background: rgba(31,111,235,.08);
}
.page-hero-inner {
  position: relative;
  z-index: 1;
  max-width: 860px;
  margin: 0 auto;
  text-align: center;
}
.page-hero .eyebrow {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 6px 12px;
  border: 1px solid rgba(22,132,111,.18);
  border-radius: 999px;
  background: rgba(255,255,255,.72);
}
.page-hero h1 { margin-top: 18px; font-size: clamp(38px, 5vw, 64px); }
.page-hero p { max-width: 760px; margin-left: auto; margin-right: auto; }
.page-hero .keyword-row { justify-content: center; }
.article-layout { display: grid; grid-template-columns: minmax(0, 2fr) minmax(260px, 1fr); gap: 24px; }
.article-layout article, .article-layout aside {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 26px;
  box-shadow: 0 12px 32px rgba(23, 32, 47, .04);
}
.article-layout h2 { margin: 0 0 12px; font-size: 24px; }
.article-layout h2:not(:first-child) { margin-top: 30px; }
.article-layout p, .article-layout li { color: var(--muted); }
.site-footer {
  margin-top: 64px;
  padding: 40px clamp(18px, 5vw, 72px);
  background: var(--dark);
  color: #fff;
}
.site-footer p { max-width: 760px; color: rgba(255,255,255,.68); }
.footer-links { display: flex; gap: 14px; flex-wrap: wrap; margin: 18px 0; color: rgba(255,255,255,.78); }
.fine-print { font-size: 13px; }
@media (max-width: 900px) {
  .site-header { position: static; align-items: flex-start; flex-direction: column; }
  .hero { min-height: 920px; align-items: flex-start; padding-bottom: 360px; }
  .hero::before { background: linear-gradient(180deg, rgba(245,247,250,.99) 0%, rgba(245,247,250,.98) 47%, rgba(245,247,250,.42) 72%, rgba(245,247,250,.12) 100%); }
  .hero-bg { object-position: 64% bottom; transform: translateY(280px) scale(1.1); transform-origin: bottom center; }
  .card-grid, .workflow ol, .article-layout { grid-template-columns: 1fr; }
  .content-band, .workflow { padding: 52px 16px; }
  .page-hero { padding: 56px 16px 48px; }
  nav { gap: 12px; }
  .hero-actions .button { width: 100%; }
}