/* root- : classic wide marketing, teal family */
:root {
  --root-deep: #075E54;
  --root-mid: #128C7E;
  --root-pop: #25D366;
  --root-bubble: #DCF8C6;
  --root-paper: #ECE5DD;
  --root-ink: #111813;
}

* { box-sizing: border-box; }
html { scroll-behavior: auto; }
body.root-body {
  margin: 0;
  color: var(--root-ink);
  background: #f4f1ec;
  font-family: "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  line-height: 1.7;
}

.root-wrap { min-height: 100vh; }

.root-top {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 14px 48px;
  background: #ffffff;
  border-bottom: 3px solid var(--root-pop);
  box-shadow: 0 2px 0 rgba(7, 94, 84, 0.06);
}

.root-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--root-deep);
  font-weight: 700;
  font-size: 18px;
  letter-spacing: 0.02em;
  text-decoration: none;
  white-space: nowrap;
}

.root-brand svg { display: block; }

.root-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 6px 16px;
}

.root-nav a {
  color: var(--root-deep);
  text-decoration: none;
  font-size: 14px;
  font-weight: 600;
}

.root-nav a:hover { color: var(--root-mid); }

.root-hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  max-width: 1180px;
  margin: 0 auto;
  padding: 64px 48px 48px;
}

.root-kicker {
  display: inline-block;
  margin-bottom: 12px;
  padding: 4px 10px;
  background: var(--root-bubble);
  color: var(--root-deep);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.root-hero h1 {
  margin: 0 0 18px;
  color: var(--root-deep);
  font-size: 36px;
  line-height: 1.28;
}

.root-hero p {
  margin: 0;
  font-size: 17px;
  max-width: 36em;
}

.root-stage { display: flex; justify-content: center; }

.root-laptop {
  width: 100%;
  max-width: 460px;
}

.root-lid {
  background: #1a2a24;
  border-radius: 12px 12px 0 0;
  padding: 14px 14px 0;
  box-shadow: 0 18px 40px rgba(17, 24, 19, 0.18);
}

.root-bezel {
  background: #128C7E;
  min-height: 240px;
  border-radius: 8px 8px 0 0;
  padding: 16px;
  display: grid;
  grid-template-columns: 38% 1fr;
  gap: 10px;
}

.root-side {
  background: rgba(7, 94, 84, 0.35);
  border-radius: 6px;
  padding: 8px;
}

.root-row {
  height: 10px;
  margin-bottom: 8px;
  background: rgba(236, 229, 221, 0.35);
  border-radius: 4px;
}

.root-thread {
  display: flex;
  flex-direction: column;
  gap: 8px;
  justify-content: flex-end;
}

.root-in,
.root-out {
  max-width: 86%;
  padding: 8px 10px;
  border-radius: 8px;
  font-size: 11px;
  line-height: 1.4;
}

.root-in { background: #ffffff; color: var(--root-ink); align-self: flex-start; }
.root-out { background: var(--root-bubble); color: var(--root-ink); align-self: flex-end; }

.root-base {
  height: 16px;
  background: #2b3833;
  border-radius: 0 0 10px 10px;
}

.root-chin {
  width: 42%;
  height: 10px;
  margin: 0 auto;
  background: #3d4a44;
  border-radius: 0 0 8px 8px;
}

.root-band {
  background: var(--root-paper);
  border-top: 1px solid #d8d0c6;
  border-bottom: 1px solid #d8d0c6;
}

.root-section {
  max-width: 1180px;
  margin: 0 auto;
  padding: 64px 48px;
}

.root-section h2 {
  margin: 0 0 12px;
  color: var(--root-deep);
  font-size: 28px;
  line-height: 1.35;
}

.root-lead {
  margin: 0 0 28px;
  max-width: 48em;
}

.root-trio {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.root-card {
  background: #ffffff;
  border: 1px solid #d5ddd8;
  border-top: 4px solid var(--root-mid);
  padding: 22px 20px 24px;
  min-height: 100%;
}

.root-card svg {
  display: block;
  margin-bottom: 12px;
}

.root-card h3 {
  margin: 0 0 10px;
  color: var(--root-deep);
  font-size: 18px;
}

.root-card p { margin: 0; font-size: 15px; }

.root-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  position: relative;
}

.root-steps::before {
  content: "";
  position: absolute;
  top: 28px;
  left: 8%;
  right: 8%;
  height: 3px;
  background: var(--root-pop);
}

.root-step {
  position: relative;
  padding: 0 12px;
  text-align: center;
}

.root-num {
  width: 56px;
  height: 56px;
  margin: 0 auto 14px;
  border-radius: 50%;
  background: var(--root-deep);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 20px;
  position: relative;
  z-index: 1;
}

.root-step h3 {
  margin: 0 0 8px;
  color: var(--root-deep);
  font-size: 16px;
}

.root-step p { margin: 0; font-size: 14px; text-align: left; }

.root-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.root-pane {
  background: #ffffff;
  padding: 28px;
  border-left: 8px solid var(--root-mid);
}

.root-pane.alt { border-left-color: var(--root-pop); }

.root-pane h3 {
  margin: 0 0 12px;
  color: var(--root-deep);
}

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

.root-pane li { margin-bottom: 10px; }

.root-people {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.root-who {
  background: var(--root-deep);
  color: #f3fff8;
  padding: 20px;
}

.root-who h3 {
  margin: 0 0 10px;
  font-size: 16px;
  color: var(--root-pop);
}

.root-who p { margin: 0; font-size: 14px; }

.root-desk {
  display: grid;
  grid-template-columns: 220px 1fr;
  min-height: 320px;
  background: #ffffff;
  border: 1px solid #cfd8d3;
  overflow: hidden;
}

.root-list {
  background: var(--root-deep);
  color: #e8fff4;
  padding: 16px;
}

.root-list h3 { margin: 0 0 12px; font-size: 15px; color: var(--root-bubble); }
.root-chip {
  background: rgba(255,255,255,0.08);
  padding: 8px 10px;
  margin-bottom: 8px;
  font-size: 13px;
}

.root-mainpane { padding: 20px 24px; background: var(--root-paper); }
.root-mainpane h3 { margin: 0 0 8px; color: var(--root-deep); }
.root-bubbleline {
  max-width: 70%;
  background: #fff;
  padding: 10px 12px;
  border-radius: 8px;
  margin: 10px 0;
  font-size: 14px;
}
.root-bubbleline.me {
  margin-left: auto;
  background: var(--root-bubble);
}

.root-prep {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.root-prep article {
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: 12px;
  background: #fff;
  padding: 18px;
  border: 1px dashed var(--root-mid);
}

.root-prep h3 { margin: 0 0 6px; color: var(--root-deep); font-size: 16px; }
.root-prep p { margin: 0; font-size: 14px; }

.root-faq details {
  background: #fff;
  border-bottom: 1px solid #d7ddd9;
  padding: 4px 8px;
}

.root-faq summary {
  cursor: pointer;
  padding: 14px 8px;
  font-weight: 700;
  color: var(--root-deep);
}

.root-faq details p {
  margin: 0 8px 16px;
  font-size: 15px;
}

.root-foot {
  background: var(--root-ink);
  color: #d7e4dc;
  padding: 36px 48px;
  font-size: 13px;
}

.root-foot p { margin: 0 0 10px; max-width: 70em; }
.root-foot p:last-child { margin-bottom: 0; }

@media (max-width: 980px) {
  .root-top { padding: 12px 20px; flex-direction: column; align-items: flex-start; }
  .root-hero, .root-split, .root-desk, .root-prep, .root-people, .root-trio, .root-steps {
    grid-template-columns: 1fr;
  }
  .root-hero, .root-section { padding: 40px 20px; }
  .root-steps::before { display: none; }
  .root-people { grid-template-columns: 1fr 1fr; }
}