:root {
  --ink: #10162d;
  --muted: #69728c;
  --line: #e6e9f2;
  --paper: #fbfcff;
  --violet: #7657f0;
  --cyan: #20c9e8;
  --coral: #ff7a9b;
  --lime: #b8e986;
  --navy: #0b1229;
  --shadow: 0 18px 45px rgba(23, 29, 62, .11);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Segoe UI", "Microsoft YaHei", Arial, sans-serif;
  line-height: 1.7;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }
.shell { width: min(1180px, calc(100% - 40px)); margin: 0 auto; }
.topbar {
  position: sticky; top: 0; z-index: 10;
  background: rgba(251, 252, 255, .92);
  border-bottom: 1px solid rgba(230, 233, 242, .9);
  backdrop-filter: blur(16px);
}
.nav { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 11px; font-weight: 800; letter-spacing: .02em; }
.brand img { width: 38px; height: 38px; border-radius: 11px; }
.brand span { font-size: 20px; }
.nav-links { display: flex; align-items: center; gap: 24px; color: #56607a; font-size: 14px; }
.nav-links a { padding: 9px 0; border-bottom: 2px solid transparent; }
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--ink); border-color: var(--cyan); }
.nav-cta, .button { display: inline-flex; align-items: center; justify-content: center; gap: 9px; border: 0; cursor: pointer; font: inherit; font-weight: 800; border-radius: 12px; padding: 12px 18px; transition: transform .2s ease, box-shadow .2s ease; }
.nav-cta, .button-primary { color: #fff; background: var(--navy); box-shadow: 0 10px 20px rgba(11, 18, 41, .18); }
.nav-cta:hover, .button:hover { transform: translateY(-2px); box-shadow: 0 14px 26px rgba(11, 18, 41, .22); }
.button-cyan { color: #061128; background: var(--cyan); }
.button-ghost { color: var(--ink); background: #fff; border: 1px solid var(--line); }
.eyebrow { display: inline-flex; align-items: center; gap: 8px; color: #52607c; font-size: 12px; font-weight: 800; letter-spacing: .15em; text-transform: uppercase; }
.eyebrow::before { content: ""; width: 24px; height: 2px; background: var(--coral); }
.hero { padding: 74px 0 64px; overflow: hidden; }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(320px, .9fr); align-items: center; gap: 64px; }
.hero h1 { margin: 18px 0 18px; max-width: 560px; font-size: clamp(42px, 6vw, 74px); line-height: 1.04; letter-spacing: -.04em; }
.hero h1 em { color: var(--violet); font-style: normal; }
.hero-copy { max-width: 620px; color: var(--muted); font-size: 18px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.micro-note { margin-top: 14px; color: #8b93a8; font-size: 12px; }
.hero-art { position: relative; min-height: 520px; }
.hero-panel { position: absolute; inset: 20px 20px 0 40px; border-radius: 28px; background: var(--navy); box-shadow: var(--shadow); padding: 24px; transform: rotate(2deg); }
.hero-panel::before { content: ""; position: absolute; width: 110px; height: 110px; border-radius: 50%; background: var(--coral); top: -32px; right: -28px; opacity: .85; }
.hero-panel::after { content: ""; position: absolute; width: 68px; height: 68px; border-radius: 18px; background: var(--lime); bottom: 34px; left: -20px; transform: rotate(18deg); }
.hero-panel img { position: relative; z-index: 1; width: min(330px, 80%); margin: 24px auto 0; border-radius: 24px; box-shadow: 0 12px 35px rgba(0,0,0,.25); }
.hero-stamp { position: absolute; z-index: 2; left: -18px; top: 88px; padding: 11px 14px; border-radius: 10px; color: #fff; background: var(--violet); font-size: 12px; font-weight: 800; letter-spacing: .12em; }
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.stat { padding: 22px; background: #fff; }
.stat strong { display: block; font-size: 28px; line-height: 1; }
.stat span { display: block; margin-top: 8px; color: var(--muted); font-size: 13px; }
.section { padding: 84px 0; }
.section-alt { background: #f2f4fa; }
.section-head { display: flex; align-items: end; justify-content: space-between; gap: 24px; margin-bottom: 34px; }
.section h2 { margin: 12px 0 0; font-size: clamp(28px, 4vw, 45px); line-height: 1.15; letter-spacing: -.03em; }
.section-head a { color: var(--violet); font-size: 14px; font-weight: 800; }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.feature { min-height: 230px; padding: 26px; border: 1px solid var(--line); border-radius: 18px; background: #fff; box-shadow: 0 10px 24px rgba(23, 29, 62, .04); }
.feature:nth-child(2) { background: #eefbff; }
.feature:nth-child(3) { background: #f5efff; }
.feature .num { color: var(--violet); font-size: 13px; font-weight: 900; letter-spacing: .14em; }
.feature h3 { margin: 26px 0 10px; font-size: 21px; }
.feature p { margin: 0; color: var(--muted); font-size: 15px; }
.screens { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; align-items: start; }
.screen-card { padding: 14px; background: #fff; border: 1px solid var(--line); border-radius: 20px; box-shadow: 0 12px 28px rgba(23, 29, 62, .06); }
.screen-card:nth-child(2) { margin-top: 36px; }
.screen-card:nth-child(3) { margin-top: 72px; }
.screen-card img { width: min(100%, 400px); margin: 0 auto; border-radius: 14px; }
.screen-card figcaption { padding: 14px 4px 4px; font-size: 14px; color: var(--muted); }
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 52px; align-items: center; }
.split h2 { margin-top: 12px; }
.list { display: grid; gap: 13px; padding: 0; margin: 28px 0 0; list-style: none; }
.list li { display: flex; gap: 12px; align-items: flex-start; color: #4f5872; }
.list li::before { content: "↗"; flex: 0 0 auto; color: var(--coral); font-weight: 900; }
.callout { padding: 30px; border-radius: 22px; color: #fff; background: var(--navy); }
.callout h3 { margin: 0 0 12px; font-size: 25px; }
.callout p { margin: 0; color: #c6d0e5; }
.callout .button { margin-top: 22px; }
.quote-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.quote { padding: 24px; border-top: 3px solid var(--cyan); background: #fff; border-radius: 14px; box-shadow: 0 10px 25px rgba(23, 29, 62, .05); }
.quote p { margin: 0; color: #3e4762; }
.quote cite { display: block; margin-top: 18px; color: #8a93a8; font-size: 13px; font-style: normal; }
.page-hero { padding: 68px 0 54px; background: linear-gradient(135deg, #eef1ff 0%, #fbfcff 52%, #e8fbff 100%); }
.page-hero h1 { max-width: 840px; margin: 18px 0 0; font-size: clamp(38px, 6vw, 66px); line-height: 1.06; letter-spacing: -.04em; }
.page-hero .lead { max-width: 760px; margin-top: 20px; color: var(--muted); font-size: 18px; }
.content-grid { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(250px, .75fr); gap: 46px; align-items: start; }
.article { max-width: 770px; }
.article h2 { margin: 44px 0 14px; font-size: 30px; line-height: 1.2; }
.article h3 { margin: 26px 0 8px; font-size: 20px; }
.article p { color: #4f5872; }
.article ul, .article ol { padding-left: 22px; color: #4f5872; }
.article li { margin: 10px 0; }
.toc { position: sticky; top: 102px; padding: 22px; border: 1px solid var(--line); border-radius: 16px; background: #fff; }
.toc strong { display: block; margin-bottom: 12px; }
.toc a { display: block; padding: 7px 0; color: #66718a; font-size: 14px; }
.toc a:hover { color: var(--violet); }
.step-list { display: grid; gap: 14px; padding: 0; list-style: none; counter-reset: steps; }
.step-list li { counter-increment: steps; display: grid; grid-template-columns: 46px 1fr; gap: 16px; padding: 18px; border: 1px solid var(--line); border-radius: 14px; background: #fff; }
.step-list li::before { content: counter(steps, decimal-leading-zero); display: grid; place-items: center; width: 42px; height: 42px; border-radius: 12px; color: #fff; background: var(--violet); font-weight: 900; }
.step-list h3 { margin: 0 0 5px; }
.step-list p { margin: 0; }
.faq { display: grid; gap: 12px; }
.faq details { padding: 18px 20px; border: 1px solid var(--line); border-radius: 14px; background: #fff; }
.faq summary { cursor: pointer; font-weight: 800; }
.faq p { margin: 12px 0 0; color: var(--muted); }
.footer { margin-top: 40px; padding: 46px 0 26px; color: #cbd4e8; background: var(--navy); }
.footer-grid { display: grid; grid-template-columns: 1.2fr .8fr .8fr; gap: 34px; }
.footer .brand { color: #fff; }
.footer p { max-width: 420px; color: #a9b7d2; font-size: 14px; }
.footer h3 { margin: 0 0 10px; color: #fff; font-size: 14px; }
.footer a { display: block; padding: 4px 0; color: #a9b7d2; font-size: 14px; }
.footer a:hover { color: var(--cyan); }
.disclaimer { margin-top: 34px; padding-top: 20px; border-top: 1px solid #273555; color: #a9b7d2; font-size: 12px; }
.copyright { margin-top: 14px; color: #7786a6; font-size: 12px; }
.mobile-toggle { display: none; border: 0; color: var(--ink); background: transparent; font-size: 24px; }

@media (max-width: 860px) {
  .shell { width: min(100% - 28px, 680px); }
  .nav { min-height: 68px; }
  .mobile-toggle { display: block; }
  .nav-links { display: none; position: absolute; top: 68px; left: 0; right: 0; padding: 14px 20px 20px; background: #fff; border-bottom: 1px solid var(--line); flex-direction: column; align-items: stretch; gap: 2px; }
  .nav-links.is-open { display: flex; }
  .nav-links a { padding: 10px 0; }
  .nav-cta { display: none; }
  .hero { padding: 52px 0 44px; }
  .hero-grid, .split, .content-grid { grid-template-columns: 1fr; gap: 34px; }
  .hero-art { min-height: 430px; }
  .hero-panel { inset: 16px 24px 0 24px; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .section { padding: 62px 0; }
  .section-head { align-items: start; flex-direction: column; gap: 10px; }
  .feature-grid, .quote-grid { grid-template-columns: 1fr; }
  .screens { grid-template-columns: 1fr; max-width: 400px; margin: 0 auto; }
  .screen-card:nth-child(2), .screen-card:nth-child(3) { margin-top: 0; }
  .toc { position: static; order: -1; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 500px) {
  .hero h1 { font-size: 44px; }
  .hero-copy { font-size: 16px; }
  .hero-actions { align-items: stretch; flex-direction: column; }
  .hero-actions .button { width: 100%; }
  .footer-grid { grid-template-columns: 1fr; }
}