:root {
  --ink: #163042;
  --muted: #5d7180;
  --sky: #65c6d8;
  --sky-deep: #1687a0;
  --leaf: #76c795;
  --sun: #f6c85f;
  --paper: #f7fbfa;
  --line: #d8e9e7;
  --night: #12303d;
  --white: #ffffff;
  --shadow: 0 18px 45px rgba(25, 67, 77, .12);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  line-height: 1.75;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }
.container { width: min(1120px, calc(100% - 40px)); margin: 0 auto; }
.site-header {
  position: sticky; top: 0; z-index: 20;
  background: rgba(247, 251, 250, .95);
  border-bottom: 1px solid rgba(216, 233, 231, .9);
  backdrop-filter: blur(12px);
}
.nav-wrap { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 11px; font-size: 20px; font-weight: 800; letter-spacing: .04em; }
.brand img { width: 42px; height: 42px; border-radius: 12px; }
.nav-links { display: flex; align-items: center; gap: 22px; color: var(--muted); font-size: 14px; }
.nav-links a { padding: 8px 0; border-bottom: 2px solid transparent; }
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--sky-deep); border-bottom-color: var(--sky); }
.nav-toggle { display: none; border: 0; background: transparent; color: var(--ink); font-size: 26px; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 46px; padding: 0 22px; border-radius: 14px; border: 1px solid transparent;
  font-weight: 700; cursor: pointer; transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}
.btn:hover { transform: translateY(-2px); box-shadow: 0 12px 20px rgba(22, 135, 160, .18); }
.btn-primary { background: var(--sky-deep); color: var(--white); }
.btn-soft { background: #e7f6f4; color: var(--sky-deep); border-color: #cceae4; }
.hero { padding: 86px 0 70px; overflow: hidden; position: relative; }
.hero-grid { display: grid; grid-template-columns: 1.08fr .92fr; gap: 60px; align-items: center; }
.eyebrow { display: inline-flex; align-items: center; gap: 8px; color: var(--sky-deep); font-weight: 800; font-size: 13px; letter-spacing: .12em; text-transform: uppercase; }
.eyebrow::before { content: ""; width: 28px; height: 3px; border-radius: 3px; background: var(--sun); }
h1, h2, h3 { line-height: 1.25; margin: 0 0 16px; letter-spacing: -.02em; }
h1 { font-size: clamp(38px, 5vw, 66px); max-width: 640px; }
h2 { font-size: clamp(28px, 3vw, 42px); }
h3 { font-size: 20px; }
.lead { font-size: 18px; color: var(--muted); max-width: 620px; margin: 0 0 28px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
.micro { font-size: 12px; color: var(--muted); margin-top: 12px; }
.hero-art { position: relative; min-height: 460px; display: grid; place-items: center; }
.hero-art::before { content: ""; position: absolute; width: 370px; height: 370px; border-radius: 50%; background: #dff3ed; right: 10%; top: 6%; }
.hero-art::after { content: ""; position: absolute; width: 120px; height: 120px; border-radius: 28px; background: #ffefbe; left: 9%; bottom: 10%; transform: rotate(14deg); }
.phone { position: relative; z-index: 1; width: min(285px, 72vw); padding: 10px; border-radius: 34px; background: #153b49; box-shadow: var(--shadow); }
.phone img { border-radius: 25px; width: 100%; }
.section { padding: 86px 0; }
.section-alt { background: #eaf6f2; }
.section-head { display: flex; justify-content: space-between; align-items: end; gap: 24px; margin-bottom: 30px; }
.section-head p { color: var(--muted); max-width: 520px; margin: 0; }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.feature-card { padding: 24px; background: var(--white); border: 1px solid var(--line); border-radius: 20px; box-shadow: 0 8px 20px rgba(25, 67, 77, .05); }
.feature-icon { width: 42px; height: 42px; display: grid; place-items: center; border-radius: 13px; color: var(--sky-deep); background: #e1f5f4; margin-bottom: 16px; }
.feature-card p { color: var(--muted); margin: 0; font-size: 14px; }
.feature-card ul, .info-list { padding-left: 20px; margin: 12px 0 0; color: var(--muted); font-size: 14px; }
.showcase { display: grid; grid-template-columns: .85fr 1.15fr; gap: 46px; align-items: center; }
.screen-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; align-items: end; }
.screen-row img { width: 100%; max-width: 240px; margin: 0 auto; border-radius: 22px; box-shadow: 0 12px 25px rgba(21, 59, 73, .15); }
.screen-row img:nth-child(2) { transform: translateY(-24px); }
.tag-list { display: flex; flex-wrap: wrap; gap: 9px; margin: 18px 0 0; }
.tag { border: 1px solid #c8e6df; color: var(--sky-deep); background: #f2fbf8; border-radius: 999px; padding: 4px 12px; font-size: 12px; }
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-top: 26px; }
.stat { padding: 16px; border-left: 3px solid var(--sun); background: rgba(255,255,255,.72); }
.stat strong { display: block; font-size: 25px; color: var(--night); }
.stat span { color: var(--muted); font-size: 12px; }
.link-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.link-card { padding: 22px; border-radius: 18px; background: var(--night); color: var(--white); min-height: 175px; display: flex; flex-direction: column; justify-content: space-between; }
.link-card p { color: #b9d3d4; font-size: 14px; margin: 0; }
.link-card a { color: #a8e4dc; font-weight: 700; font-size: 14px; }
.quote-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
blockquote { margin: 0; padding: 22px; background: #fff9e5; border: 1px solid #f2df9a; border-radius: 18px; color: #5c4e22; }
blockquote p { margin: 0 0 12px; }
cite { font-size: 12px; font-style: normal; color: #8c7936; }
.article-hero { padding: 76px 0 42px; background: linear-gradient(135deg, #e7f6f4, #fff8e2); }
.article-hero p { max-width: 720px; color: var(--muted); font-size: 17px; margin: 0; }
.article-layout { display: grid; grid-template-columns: 1fr 280px; gap: 42px; align-items: start; }
.article { max-width: 760px; }
.article h2 { font-size: 28px; margin-top: 42px; }
.article h3 { margin-top: 28px; }
.article p, .article li { color: #47606d; font-size: 16px; }
.article ul, .article ol { padding-left: 22px; }
.note { margin: 24px 0; padding: 18px 20px; border-left: 4px solid var(--sun); background: #fff9e6; color: #665923; border-radius: 0 12px 12px 0; }
.side-nav { position: sticky; top: 105px; padding: 20px; background: var(--white); border: 1px solid var(--line); border-radius: 16px; }
.side-nav strong { display: block; margin-bottom: 10px; }
.side-nav a { display: block; padding: 7px 0; color: var(--muted); font-size: 14px; }
.side-nav a:hover { color: var(--sky-deep); }
.faq-list { display: grid; gap: 12px; }
details { background: var(--white); border: 1px solid var(--line); border-radius: 14px; padding: 16px 18px; }
summary { cursor: pointer; font-weight: 800; color: var(--night); }
details p { color: var(--muted); margin: 10px 0 0; font-size: 14px; }
.cta-band { padding: 58px 0; background: var(--sky-deep); color: var(--white); }
.cta-wrap { display: flex; justify-content: space-between; align-items: center; gap: 30px; }
.cta-band p { color: #d3f2ee; margin: 0; }
.cta-band .btn-primary { background: var(--sun); color: var(--night); }
.site-footer { padding: 36px 0 22px; background: var(--night); color: #c9e1e0; }
.footer-grid { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 28px; }
.site-footer h3 { color: var(--white); font-size: 16px; }
.site-footer p, .site-footer a { font-size: 13px; color: #a9c7c7; }
.site-footer .brand { color: var(--white); }
.footer-bottom { border-top: 1px solid rgba(201,225,224,.18); margin-top: 26px; padding-top: 18px; font-size: 12px; color: #91b2b2; }
.disclaimer { margin: 0; }
.reveal { opacity: 0; transform: translateY(16px); transition: opacity .6s ease, transform .6s ease; }
.reveal.is-visible { opacity: 1; transform: none; }
@media (max-width: 860px) {
  .nav-toggle { display: block; }
  .nav-links { display: none; position: absolute; left: 20px; right: 20px; top: 68px; padding: 14px 18px; background: var(--white); border: 1px solid var(--line); border-radius: 14px; box-shadow: var(--shadow); flex-direction: column; align-items: stretch; gap: 4px; }
  .nav-links.is-open { display: flex; }
  .hero-grid, .showcase, .article-layout { grid-template-columns: 1fr; }
  .hero { padding-top: 54px; }
  .hero-art { min-height: 390px; }
  .side-nav { position: static; order: -1; }
  .feature-grid, .link-grid, .quote-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 560px) {
  .container { width: min(100% - 28px, 1120px); }
  .nav-wrap { min-height: 68px; }
  .brand { font-size: 17px; }
  .brand img { width: 36px; height: 36px; }
  h1 { font-size: 39px; }
  .lead { font-size: 16px; }
  .section { padding: 62px 0; }
  .feature-grid, .link-grid, .quote-grid, .stats, .footer-grid { grid-template-columns: 1fr; }
  .section-head, .cta-wrap { display: block; }
  .section-head p { margin-top: 12px; }
  .cta-wrap .btn { margin-top: 18px; }
  .screen-row { gap: 8px; }
  .screen-row img { border-radius: 15px; }
}