:root {
  --bg: #f6f8fb;
  --surface: rgba(255, 255, 255, 0.92);
  --surface-solid: #ffffff;
  --text: #172033;
  --muted: #667085;
  --line: #e7ebf2;
  --primary: #315efb;
  --primary-dark: #2348ce;
  --primary-soft: #edf2ff;
  --accent: #6d7df7;
  --shadow: 0 18px 50px rgba(40, 58, 100, 0.10);
  --radius: 22px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-width: 320px;
  color: var(--text);
  background:
    radial-gradient(circle at 8% 4%, rgba(49,94,251,.11), transparent 30%),
    radial-gradient(circle at 92% 20%, rgba(109,125,247,.08), transparent 28%),
    var(--bg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
a:focus-visible, button:focus-visible { outline: 3px solid rgba(49,94,251,.28); outline-offset: 3px; }
img, svg { max-width: 100%; }

.container { width: min(1120px, calc(100% - 40px)); margin: 0 auto; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid rgba(231,235,242,.75);
  background: rgba(246,248,251,.82);
  backdrop-filter: blur(18px);
}
.header-inner {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand { display: inline-flex; align-items: center; gap: 11px; font-weight: 760; letter-spacing: .02em; }
.brand-mark {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  color: #fff;
  border-radius: 12px;
  background: linear-gradient(145deg, var(--primary), var(--accent));
  box-shadow: 0 9px 22px rgba(49,94,251,.22);
}
.brand small { display: block; color: var(--muted); font-size: 11px; font-weight: 500; letter-spacing: .08em; line-height: 1.2; }
.nav { display: flex; align-items: center; gap: 6px; }
.nav a { padding: 9px 13px; border-radius: 10px; color: #49536a; font-size: 14px; }
.nav a:hover, .nav a[aria-current="page"] { color: var(--primary); background: var(--primary-soft); }

.hero { padding: 82px 0 46px; }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(290px, .8fr); gap: 52px; align-items: center; }
.eyebrow { display: inline-flex; align-items: center; gap: 9px; color: var(--primary); font-size: 13px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; }
.eyebrow::before { content: ""; width: 28px; height: 2px; border-radius: 99px; background: currentColor; }
h1 { margin: 18px 0 22px; font-size: clamp(42px, 6.3vw, 72px); line-height: 1.08; letter-spacing: -.045em; }
.hero-lead { max-width: 700px; margin: 0; color: #566078; font-size: clamp(17px, 2vw, 20px); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 46px; padding: 0 20px; border-radius: 13px; font-weight: 700; font-size: 14px; transition: .2s ease; }
.button.primary { color: #fff; background: var(--primary); box-shadow: 0 12px 26px rgba(49,94,251,.22); }
.button.primary:hover { transform: translateY(-2px); background: var(--primary-dark); }
.button.secondary { border: 1px solid var(--line); background: rgba(255,255,255,.75); }
.button.secondary:hover { transform: translateY(-2px); border-color: #cfd7e8; background: #fff; }

.hero-card {
  position: relative;
  min-height: 390px;
  overflow: hidden;
  border: 1px solid rgba(255,255,255,.8);
  border-radius: 34px;
  background: linear-gradient(155deg, #fff 8%, #edf2ff 100%);
  box-shadow: var(--shadow);
}
.hero-card::before, .hero-card::after { content: ""; position: absolute; border-radius: 50%; filter: blur(2px); }
.hero-card::before { width: 230px; height: 230px; top: -76px; right: -65px; background: rgba(49,94,251,.18); }
.hero-card::after { width: 190px; height: 190px; bottom: -90px; left: -70px; background: rgba(109,125,247,.16); }
.orbit { position: absolute; inset: 48px; border: 1px solid rgba(49,94,251,.14); border-radius: 50%; }
.orbit.two { inset: 88px; }
.center-note {
  position: absolute;
  inset: 0;
  display: grid;
  place-content: center;
  text-align: center;
  z-index: 2;
}
.center-note strong { display: block; font-size: 64px; line-height: 1; color: var(--primary); }
.center-note span { display: block; margin-top: 15px; color: #5c6780; font-size: 14px; letter-spacing: .1em; }
.float-chip {
  position: absolute;
  z-index: 3;
  padding: 10px 14px;
  border: 1px solid rgba(255,255,255,.85);
  border-radius: 999px;
  background: rgba(255,255,255,.78);
  box-shadow: 0 10px 24px rgba(44,62,110,.10);
  backdrop-filter: blur(10px);
  color: #48536c;
  font-size: 13px;
}
.float-chip.one { top: 54px; left: 34px; }
.float-chip.two { right: 27px; top: 157px; }
.float-chip.three { left: 48px; bottom: 49px; }

.section { padding: 54px 0; }
.section.alt { background: rgba(255,255,255,.46); border-top: 1px solid rgba(231,235,242,.8); border-bottom: 1px solid rgba(231,235,242,.8); }
.section-heading { display: flex; justify-content: space-between; gap: 24px; align-items: end; margin-bottom: 25px; }
.section-heading h2 { margin: 0; font-size: clamp(27px, 4vw, 38px); letter-spacing: -.025em; }
.section-heading p { max-width: 520px; margin: 0; color: var(--muted); }

.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.card {
  min-height: 100%;
  padding: 25px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: 0 8px 24px rgba(30,47,92,.045);
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.card:hover { transform: translateY(-4px); border-color: #d8deeb; box-shadow: 0 16px 35px rgba(30,47,92,.08); }
.card-icon { width: 43px; height: 43px; display: grid; place-items: center; margin-bottom: 18px; border-radius: 13px; color: var(--primary); background: var(--primary-soft); font-weight: 800; }
.card h3 { margin: 0 0 10px; font-size: 20px; }
.card p { margin: 0; color: var(--muted); font-size: 14px; }
.card-meta { display: flex; align-items: center; justify-content: space-between; margin-top: 20px; padding-top: 17px; border-top: 1px solid var(--line); color: #7a8498; font-size: 12px; }
.card-link { color: var(--primary); font-weight: 700; }

.note-list { display: grid; gap: 14px; }
.note-row {
  display: grid;
  grid-template-columns: 112px minmax(0,1fr) auto;
  align-items: center;
  gap: 20px;
  padding: 20px 22px;
  border: 1px solid var(--line);
  border-radius: 17px;
  background: rgba(255,255,255,.82);
}
.note-row time { color: #8790a2; font-size: 13px; }
.note-row h3 { margin: 0 0 3px; font-size: 17px; }
.note-row p { margin: 0; color: var(--muted); font-size: 13px; }
.note-row .arrow { color: var(--primary); font-size: 20px; }

.statement {
  display: grid;
  grid-template-columns: 1fr .85fr;
  gap: 24px;
  align-items: stretch;
}
.statement-main, .statement-side { padding: 32px; border-radius: 25px; }
.statement-main { color: #fff; background: linear-gradient(145deg, #233fae, #315efb 62%, #6d7df7); box-shadow: 0 18px 45px rgba(49,94,251,.18); }
.statement-main h2 { margin: 0 0 13px; font-size: 31px; }
.statement-main p { margin: 0; color: rgba(255,255,255,.82); }
.statement-side { border: 1px solid var(--line); background: #fff; }
.statement-side strong { display: block; margin-bottom: 10px; font-size: 17px; }
.statement-side p { margin: 0; color: var(--muted); font-size: 14px; }

.page-hero { padding: 64px 0 32px; }
.page-hero h1 { max-width: 850px; font-size: clamp(36px, 5.5vw, 58px); }
.page-hero p { max-width: 760px; color: var(--muted); font-size: 18px; }
.breadcrumb { color: #7c869b; font-size: 13px; }
.breadcrumb a { color: var(--primary); }

.article-wrap { display: grid; grid-template-columns: minmax(0, 760px) 250px; gap: 46px; align-items: start; padding: 20px 0 72px; }
.article { padding: 38px; border: 1px solid var(--line); border-radius: 26px; background: #fff; box-shadow: 0 12px 40px rgba(30,47,92,.055); }
.article h2 { margin: 34px 0 12px; font-size: 25px; letter-spacing: -.015em; }
.article h2:first-child { margin-top: 0; }
.article h3 { margin: 24px 0 8px; font-size: 19px; }
.article p { margin: 0 0 16px; color: #4f5a70; }
.article ul { padding-left: 20px; color: #4f5a70; }
.quote { margin: 24px 0; padding: 18px 20px; border-left: 4px solid var(--primary); border-radius: 0 12px 12px 0; background: var(--primary-soft); color: #3d4b6a; }
.toc { position: sticky; top: 96px; padding: 22px; border: 1px solid var(--line); border-radius: 18px; background: rgba(255,255,255,.82); }
.toc strong { display: block; margin-bottom: 12px; }
.toc a { display: block; padding: 7px 0; color: var(--muted); font-size: 13px; }
.toc a:hover { color: var(--primary); }

.site-footer { padding: 34px 0 42px; border-top: 1px solid var(--line); background: rgba(255,255,255,.56); }
.footer-inner { display: flex; align-items: center; justify-content: space-between; gap: 22px; }
.footer-copy { color: #7a8497; font-size: 13px; }
.footer-links { display: flex; flex-wrap: wrap; gap: 12px 20px; justify-content: flex-end; font-size: 13px; }
.footer-links a { color: #667085; }
.footer-links a:hover { color: var(--primary); }
.icp { color: #667085; }
.icp:hover { color: var(--primary); }

.empty-page { min-height: calc(100vh - 72px); display: grid; place-items: center; text-align: center; padding: 60px 20px; }
.empty-page strong { display: block; font-size: 88px; line-height: 1; color: var(--primary); }
.empty-page h1 { margin: 18px 0 8px; font-size: 34px; }
.empty-page p { color: var(--muted); }

@media (max-width: 900px) {
  .hero-grid, .statement, .article-wrap { grid-template-columns: 1fr; }
  .hero-card { min-height: 330px; }
  .grid-3 { grid-template-columns: 1fr 1fr; }
  .toc { display: none; }
}
@media (max-width: 680px) {
  .container { width: min(100% - 28px, 1120px); }
  .header-inner { min-height: 64px; }
  .brand small { display: none; }
  .nav a { padding: 8px 9px; font-size: 13px; }
  .nav a:nth-child(2), .nav a:nth-child(3) { display: none; }
  .hero { padding: 54px 0 32px; }
  .hero-grid { gap: 30px; }
  h1 { font-size: 43px; }
  .hero-card { min-height: 285px; border-radius: 26px; }
  .orbit { inset: 37px; }
  .orbit.two { inset: 72px; }
  .center-note strong { font-size: 52px; }
  .float-chip { font-size: 11px; padding: 8px 10px; }
  .float-chip.one { top: 30px; left: 22px; }
  .float-chip.two { top: 126px; right: 16px; }
  .float-chip.three { left: 28px; bottom: 31px; }
  .section { padding: 40px 0; }
  .section-heading { display: block; }
  .section-heading p { margin-top: 8px; }
  .grid-3 { grid-template-columns: 1fr; }
  .note-row { grid-template-columns: 1fr auto; gap: 10px; }
  .note-row time { grid-column: 1 / -1; }
  .article { padding: 24px 20px; border-radius: 20px; }
  .footer-inner { display: block; text-align: center; }
  .footer-links { justify-content: center; margin-top: 14px; }
}