:root {
  --ink: #2e1065;
  --ink-soft: #4c1d95;
  --silver: #c0c0c0;
  --silver-deep: #8a8a8a;
  --paper: #ffffff;
  --mist: #f4f2f8;
  --line: #d8d4e2;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Candara, "Microsoft YaHei", "微软雅黑", sans-serif;
  line-height: 1.75;
}

img,
svg {
  display: block;
}

a {
  color: var(--ink-soft);
}

.wrap {
  width: min(1080px, calc(100% - 40px));
  margin: 0 auto;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  background: var(--paper);
  border-bottom: 1px solid var(--silver);
}

.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 72px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--ink);
  font-weight: 700;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.brand svg {
  width: 36px;
  height: 36px;
  flex: 0 0 36px;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px 16px;
}

.nav a {
  text-decoration: none;
  color: var(--ink);
  font-size: 14px;
  border-bottom: 1px solid transparent;
}

.nav a:hover {
  border-bottom-color: var(--silver);
}

.hero {
  padding: 56px 0 40px;
  background:
    linear-gradient(180deg, var(--mist) 0%, var(--paper) 100%);
  border-bottom: 3px solid var(--silver);
}

.hero-kicker {
  margin: 0 0 10px;
  color: var(--silver-deep);
  letter-spacing: 0.18em;
  font-size: 13px;
  text-transform: uppercase;
}

.hero h1 {
  margin: 0 0 16px;
  font-size: clamp(28px, 4vw, 40px);
  line-height: 1.35;
  max-width: 18em;
}

.hero p {
  margin: 0;
  max-width: 42em;
  font-size: 18px;
}

.pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin: -28px 0 48px;
}

.pillar {
  background: var(--paper);
  border: 1px solid var(--line);
  border-top: 6px solid var(--ink);
  padding: 24px 20px 22px;
  box-shadow: 0 10px 24px rgba(46, 16, 101, 0.06);
}

.pillar svg {
  width: 32px;
  height: 32px;
  margin-bottom: 14px;
}

.pillar h3 {
  margin: 0 0 10px;
  font-size: 18px;
}

.pillar p {
  margin: 0;
  color: var(--ink-soft);
}

.section {
  padding: 28px 0 12px;
}

.section h2 {
  margin: 0 0 16px;
  font-size: 26px;
  line-height: 1.4;
}

.section p {
  margin: 0 0 14px;
}

.layers {
  display: grid;
  gap: 14px;
  margin: 18px 0 8px;
}

.layer {
  background: var(--mist);
  border-left: 5px solid var(--ink);
  padding: 16px 18px;
}

.layer:nth-child(2) {
  margin-left: 28px;
  border-left-color: var(--silver-deep);
}

.layer:nth-child(3) {
  margin-left: 56px;
  border-left-color: var(--silver);
}

.layer h3 {
  margin: 0 0 8px;
  font-size: 17px;
}

.layer p {
  margin: 0;
}

.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin: 18px 0;
}

.panel {
  padding: 20px;
  border: 1px solid var(--line);
}

.panel.see {
  background: var(--mist);
}

.panel.local {
  background: var(--paper);
  box-shadow: inset 0 0 0 1px var(--silver);
}

.panel h3 {
  margin: 0 0 10px;
}

.panel p,
.panel li {
  margin: 0 0 8px;
}

.panel ul {
  margin: 0;
  padding-left: 18px;
}

.table-wrap {
  overflow-x: auto;
  margin: 16px 0 8px;
}

table {
  width: 100%;
  border-collapse: collapse;
  background: var(--paper);
}

th,
td {
  border: 1px solid var(--line);
  padding: 12px 14px;
  text-align: left;
  vertical-align: top;
}

th {
  background: var(--ink);
  color: var(--paper);
  font-weight: 700;
}

tr:nth-child(even) td {
  background: var(--mist);
}

.steps {
  display: grid;
  gap: 14px;
  margin: 16px 0;
  counter-reset: align-step;
}

.step {
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 14px;
  align-items: start;
}

.step::before {
  counter-increment: align-step;
  content: counter(align-step);
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--ink);
  color: var(--paper);
  display: grid;
  place-items: center;
  font-weight: 700;
}

.step h3 {
  margin: 0 0 6px;
  font-size: 17px;
}

.step p {
  margin: 0;
}

.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin: 16px 0;
}

.card {
  border: 1px solid var(--silver);
  padding: 18px 16px;
  background: var(--paper);
}

.card svg {
  width: 28px;
  height: 28px;
  margin-bottom: 10px;
}

.card h3 {
  margin: 0 0 8px;
  font-size: 16px;
}

.card p {
  margin: 0;
}

.faq {
  background: var(--mist);
  padding: 36px 0 20px;
  margin-top: 24px;
}

.faq-list {
  display: grid;
  gap: 12px;
}

.faq-item {
  background: var(--paper);
  border: 1px solid var(--line);
  padding: 16px 18px;
}

.faq-item h3 {
  margin: 0 0 8px;
  font-size: 17px;
}

.faq-item p {
  margin: 0;
}

.site-footer {
  background: var(--ink);
  color: #efeaf8;
  padding: 36px 0 28px;
}

.site-footer p {
  margin: 0 0 10px;
  color: #ddd6ec;
}

.site-footer .fine {
  color: var(--silver);
  font-size: 13px;
}

@media (max-width: 900px) {
  .topbar-inner {
    flex-direction: column;
    align-items: flex-start;
    padding: 12px 0;
  }

  .pillars,
  .split,
  .cards {
    grid-template-columns: 1fr;
  }

  .layer:nth-child(2),
  .layer:nth-child(3) {
    margin-left: 0;
  }
}