:root {
  --ink: #102a56;
  --muted: #4d6490;
  --paper: #f4f8fd;
  --white: #ffffff;
  --line: #d5e2f3;
  --blue: #1769e8;
  --blue-deep: #0d4cb8;
  --navy: #071833;
  --navy-2: #0d2858;
  --honey: #f0b000;
  --teal: #0c7f78;
  --shadow: 0 24px 60px rgba(16, 42, 86, 0.1);
  --sans: "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--sans);
  line-height: 1.6;
  font-synthesis: none;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
#private, #stats, #how { scroll-margin-top: 16px; }
#poster, #cover, #faq, #open { scroll-margin-top: 80px; }
body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(880px 420px at 100% -8%, rgba(240, 176, 0, 0.18), transparent 58%),
    radial-gradient(720px 480px at -12% 12%, rgba(23, 105, 232, 0.14), transparent 52%),
    var(--paper);
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; }
:focus-visible { outline: 2px solid var(--blue); outline-offset: 3px; }

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

.nav {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 68px;
  padding: 10px 20px;
  background: rgba(244, 248, 253, 0.9);
  border-bottom: 1px solid rgba(213, 226, 243, 0.9);
  backdrop-filter: blur(16px);
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  letter-spacing: -0.03em;
  font-size: 18px;
}
.brand img {
  width: 36px;
  height: 36px;
  border-radius: 10px;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 22px;
  color: var(--muted);
  font-size: 15px;
  font-weight: 600;
}
.nav-links a:hover { color: var(--ink); }
.nav-cta {
  display: inline-flex;
  align-items: center;
  height: 38px;
  padding: 0 14px;
  border-radius: 999px;
  background: var(--ink);
  color: #fff !important;
}
.menu-btn {
  display: none;
  width: 42px;
  height: 42px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: var(--white);
  cursor: pointer;
}
.menu-btn .bars,
.menu-btn .bars::before,
.menu-btn .bars::after {
  display: block;
  width: 16px;
  height: 1.5px;
  background: var(--ink);
  position: relative;
}
.menu-btn .bars::before,
.menu-btn .bars::after { content: ""; position: absolute; left: 0; }
.menu-btn .bars::before { top: -5px; }
.menu-btn .bars::after { top: 5px; }

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(320px, 0.95fr);
  gap: 48px;
  align-items: center;
  padding: 64px 0 36px;
}
.eyebrow {
  margin: 0 0 14px;
  color: var(--blue-deep);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.12em;
}
h1, h2, h3, p { margin-top: 0; }
h1 {
  margin-bottom: 18px;
  font-size: clamp(36px, 4.6vw, 62px);
  line-height: 1.12;
  letter-spacing: -0.045em;
}
.lead {
  max-width: 38em;
  margin-bottom: 26px;
  color: var(--muted);
  font-size: 18px;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 28px;
}
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 18px;
  border-radius: 12px;
  font-weight: 700;
}
.button.primary { background: var(--blue); color: #fff; }
.button.primary:hover { background: var(--blue-deep); }
.button.ghost {
  background: var(--white);
  box-shadow: inset 0 0 0 1px var(--line);
}
.proof {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin: 0;
  padding: 0;
  list-style: none;
  color: var(--muted);
  font-size: 14px;
  font-weight: 600;
}
.proof li::before {
  content: "";
  display: inline-block;
  width: 7px;
  height: 7px;
  margin-right: 8px;
  border-radius: 50%;
  background: var(--honey);
  transform: translateY(-1px);
}

.board {
  padding: 18px;
  border-radius: 28px;
  background: var(--white);
  box-shadow: var(--shadow);
  border: 1px solid rgba(213, 226, 243, 0.9);
}
.board-top, .visitor-head, .metric-note, .between {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.board-id {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
}
.board-id img { width: 32px; height: 32px; border-radius: 8px; }
.board-id small, .demo-tag, .panel-kicker, .legal-meta {
  display: block;
  color: var(--muted);
  font-size: 12px;
  font-weight: 600;
}
.demo-tag {
  padding: 4px 8px;
  border-radius: 999px;
  background: #fff6d8;
  color: #8a6200;
}
.board-label {
  margin: 16px 0 8px;
  font-size: 13px;
  font-weight: 700;
}
.metrics {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 8px;
}
.metrics article { grid-column: span 3; }
.metrics article:nth-child(n + 5) { grid-column: span 4; }
.metrics article, .post-stats span {
  padding: 12px 10px;
  border-radius: 14px;
  background: #f5f9ff;
}
.metrics strong, .post-stats b {
  display: block;
  font-size: 22px;
  letter-spacing: -0.04em;
  font-variant-numeric: tabular-nums;
}
.metrics span, .post-stats span {
  color: var(--muted);
  font-size: 12px;
  font-weight: 600;
}
.metrics .wide { grid-column: span 1; }
.visitor {
  margin-top: 8px;
  padding: 14px;
  border-radius: 16px;
  background: #f7fbff;
  border: 1px solid var(--line);
}
.avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: #dceaff;
  color: var(--blue-deep);
  font-weight: 800;
}
.visitor-head strong { font-size: 15px; }
.visit-count { color: var(--blue-deep); font-size: 13px; font-weight: 700; }
.visitor p, .visitor .times {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 13px;
}
.times { display: flex; flex-wrap: wrap; gap: 6px 14px; }

.section { padding: 72px 0; }
.section h2 {
  margin-bottom: 12px;
  font-size: clamp(30px, 3.4vw, 44px);
  line-height: 1.18;
  letter-spacing: -0.04em;
}
.section-lead {
  max-width: 40em;
  color: var(--muted);
  font-size: 17px;
}
.split {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 40px;
  align-items: center;
}
.points { margin: 22px 0 0; padding: 0; list-style: none; }
.points li {
  display: grid;
  grid-template-columns: 42px 1fr;
  gap: 12px;
  padding: 14px 0;
  border-top: 1px solid var(--line);
}
.points b { display: block; margin-bottom: 4px; }
.points span { color: var(--muted); font-size: 14px; }
.idx {
  color: var(--blue);
  font-weight: 800;
  letter-spacing: -0.04em;
}

.flow {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 14px;
  align-items: stretch;
}
.bubble, .page-card {
  padding: 18px;
  border-radius: 20px;
  background: var(--white);
  border: 1px solid var(--line);
}
.bubble small, .page-card small {
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
}
.bubble p { margin: 10px 0 0; font-size: 16px; }
.page-card h3 { margin: 10px 0; font-size: 20px; letter-spacing: -0.03em; }
.page-card ul { margin: 0; padding-left: 18px; color: var(--muted); }
.page-card li + li { margin-top: 6px; }
.place-sheet { margin: 0; }
.place-pin {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 14px;
  padding: 12px 14px;
  border-radius: 12px;
  background: #eaf2ff;
  font-weight: 700;
}
.place-pin span:last-child { color: var(--blue); flex: none; }
.place-nav {
  margin: 12px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
}
.place-nav li {
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: var(--white);
  font-weight: 700;
}
.place-sheet figcaption {
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 13px;
}
.page-foot {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
  color: var(--teal);
  font-size: 13px;
  font-weight: 700;
}
.flow-arrow {
  align-self: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--honey);
  position: relative;
}
.flow-arrow::before {
  content: "";
  position: absolute;
  left: 11px;
  top: 12px;
  width: 10px;
  height: 10px;
  border-right: 2px solid var(--navy);
  border-bottom: 2px solid var(--navy);
  transform: rotate(-45deg);
}

.stats {
  background: linear-gradient(180deg, var(--navy), var(--navy-2));
  color: #fff;
}
.stats .eyebrow { color: var(--honey); }
.stats .section-lead { color: rgba(255, 255, 255, 0.74); }
.stat-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 28px;
  margin-top: 28px;
}
.stat-list { margin: 0; padding: 0; list-style: none; }
.stat-list li {
  display: grid;
  grid-template-columns: 148px 1fr;
  gap: 16px;
  padding: 16px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}
.stat-list b { color: var(--honey); }
.stat-list span { color: rgba(255, 255, 255, 0.78); }
.record {
  padding: 18px;
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
}
.record h3 { margin-bottom: 4px; font-size: 16px; }
.record .hint { margin: 0 0 12px; color: rgba(255, 255, 255, 0.62); font-size: 13px; }
.record .visitor { background: rgba(255, 255, 255, 0.04); border-color: rgba(255, 255, 255, 0.08); }
.record .visitor p, .record .times, .record .visitor-head strong { color: rgba(255, 255, 255, 0.86); }
.record .avatar { background: rgba(255, 255, 255, 0.12); color: #fff; }
.record .visit-count { color: var(--honey); }
.post-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  margin-top: 12px;
}
.post-stats span {
  background: rgba(255, 255, 255, 0.06);
  color: rgba(255, 255, 255, 0.7);
}
.post-stats b { color: #fff; font-size: 20px; }

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-top: 28px;
}
.steps article {
  padding: 22px 20px 8px;
  border-top: 2px solid var(--ink);
}
.steps .idx { display: block; margin-bottom: 12px; }
.steps p { color: var(--muted); }

.scenes { margin: 8px 0 0; padding: 0; list-style: none; }
.scenes li {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 24px;
  padding: 22px 0;
  border-top: 1px solid var(--line);
}
.scenes b { font-size: 18px; }
.scenes span { color: var(--muted); }

.faq {
  display: grid;
  grid-template-columns: 0.7fr 1.3fr;
  gap: 32px;
}
.faq-list details {
  border-top: 1px solid var(--line);
  padding: 16px 0;
}
.faq-list summary {
  cursor: pointer;
  font-weight: 700;
  list-style: none;
  display: flex;
  justify-content: space-between;
  gap: 16px;
}
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after { content: "+"; color: var(--blue); }
.faq-list details[open] summary::after { content: "–"; }
.faq-list p { margin: 10px 0 0; color: var(--muted); }

.open {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 28px;
  align-items: center;
  padding: 28px;
  border-radius: 28px;
  background: var(--white);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}
.search-mock {
  padding: 16px;
  border-radius: 18px;
  background: #f5f9ff;
}
.search-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 52px;
  padding: 0 14px;
  border-radius: 14px;
  background: #fff;
  border: 1px solid var(--line);
  font-weight: 800;
  letter-spacing: -0.03em;
}
.search-bar i {
  width: 14px;
  height: 14px;
  border: 2px solid var(--blue);
  border-radius: 50%;
  position: relative;
}
.search-bar i::after {
  content: "";
  position: absolute;
  width: 7px;
  height: 2px;
  right: -6px;
  bottom: -2px;
  background: var(--blue);
  transform: rotate(40deg);
}
.open ol { margin: 12px 0 0; padding-left: 18px; color: var(--muted); }
.open li + li { margin-top: 6px; }
.wx-code {
  margin: 0;
  justify-self: center;
  width: min(100%, 280px);
  padding: 16px 16px 14px;
  border-radius: 24px;
  background: #fff;
  border: 1px solid var(--line);
  text-align: center;
}
.wx-code img {
  width: 220px;
  height: 220px;
  margin: 0 auto;
  border-radius: 12px;
}
.wx-code figcaption {
  margin-top: 8px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}
.poster-sheet { margin: 0; }
.poster-card {
  width: min(100%, 300px);
  margin: 0 auto;
  padding: 22px 22px 18px;
  border-radius: 28px;
  background: #fff;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  text-align: center;
}
.poster-brand {
  color: var(--blue);
  font-size: 13px;
  font-weight: 800;
  text-align: left;
}
.poster-avatar {
  width: 72px;
  height: 72px;
  margin: 18px auto 10px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: #dceaff;
  color: var(--blue-deep);
  font-size: 28px;
  font-weight: 800;
}
.poster-card strong { font-size: 22px; letter-spacing: -0.03em; }
.poster-rule {
  height: 1px;
  margin: 16px 0 14px;
  background: var(--line);
}
.poster-card h3 {
  margin: 0 0 10px;
  text-align: left;
  font-size: 18px;
  letter-spacing: -0.03em;
}
.poster-card ul {
  margin: 0;
  padding: 0 0 0 1.1em;
  text-align: left;
  color: var(--muted);
}
.poster-card li + li { margin-top: 6px; }
.poster-mark {
  width: 92px;
  height: 92px;
  margin: 18px auto 8px;
  border-radius: 12px;
  background:
    linear-gradient(#102a56, #102a56) 0 0 / 18px 18px no-repeat,
    linear-gradient(#102a56, #102a56) 100% 0 / 18px 18px no-repeat,
    linear-gradient(#102a56, #102a56) 0 100% / 18px 18px no-repeat,
    repeating-linear-gradient(90deg, #d5e2f3 0 4px, transparent 4px 8px),
    repeating-linear-gradient(#d5e2f3 0 4px, #fff 4px 8px);
  box-shadow: inset 0 0 0 8px #fff, inset 0 0 0 9px var(--line);
}
.poster-card small { color: var(--muted); font-weight: 700; }
.poster-sheet figcaption {
  margin-top: 12px;
  text-align: center;
  color: var(--muted);
  font-size: 13px;
}
.share-mock {
  margin: 0;
  padding: 18px;
  border-radius: 24px;
  background: #e7eef8;
  border: 1px solid var(--line);
}
.cover-src-label {
  margin: 0;
  color: var(--blue);
  font-size: 12px;
  font-weight: 800;
}
.cover-src {
  margin: 6px 0 0;
  padding: 10px 12px;
  border-radius: 12px;
  background: #fff;
  color: var(--ink);
  font-size: 14px;
  line-height: 1.5;
}
.cover-examples {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-top: 12px;
}
.cover-examples article { margin: 0; }
.cover-examples article.is-wide { grid-column: 1 / -1; }
.cover-examples article > p {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
  text-align: center;
}
.cover-sample {
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  gap: 6px;
  aspect-ratio: 4 / 3;
  padding: 16px 14px;
  overflow: hidden;
  border-radius: 10px;
}
.cover-sample b,
.cover-sample span {
  font-weight: 800;
  line-height: 1.25;
}
.cover-sample b { font-size: 18px; }
.cover-sample span { font-size: 13px; }
.cover-sample.is-text {
  background: #fff;
  border: 1px solid var(--line);
  color: #1c1c20;
}
.cover-sample.is-tpl {
  background: linear-gradient(160deg, #2f6fe4 0%, #7eb6ff 55%, #f3d7b0 100%);
  color: #fff;
}
.cover-sample.is-smart { padding: 0; background: #e8eef6; }
.cover-sample.is-smart img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.wx-chat {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  margin-top: 14px;
  padding: 12px;
  border-radius: 12px;
  background: #ededed;
}
.wx-chat > img {
  width: 32px;
  height: 32px;
  border-radius: 6px;
}
.wx-name {
  color: #888;
  font-size: 12px;
  font-weight: 700;
  line-height: 1.2;
}
.wx-bubble {
  margin-top: 6px;
  padding: 10px 10px 8px;
  border: 1px solid #e5e5e5;
  border-radius: 6px;
  background: #fff;
}
.wx-title {
  color: #111;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
}
.wx-bubble img {
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  margin-top: 8px;
  border-radius: 4px;
  object-fit: cover;
}
.share-mock figcaption {
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.site-footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px 24px;
  padding: 28px 0 40px;
  color: var(--muted);
  font-size: 14px;
}
.site-footer nav { display: flex; flex-wrap: wrap; gap: 8px 16px; }
.site-footer a:hover { color: var(--ink); }
.icp {
  flex: 1 0 100%;
  margin: 4px 0 0;
  text-align: center;
  font-size: 14px;
}
.icp a { color: var(--muted); }

.legal {
  width: min(760px, calc(100% - 40px));
  margin: 0 auto;
  padding: 36px 0 64px;
}
.legal h1 { font-size: 36px; letter-spacing: -0.04em; margin-bottom: 8px; }
.legal h2 { margin: 28px 0 8px; font-size: 20px; }
.legal p, .legal li { color: var(--muted); }
.legal a { color: var(--blue-deep); text-decoration: underline; }
.legal ul { padding-left: 1.2em; }

@media (max-width: 900px) {
  .hero, .split, .stat-grid, .faq, .open { grid-template-columns: 1fr; }
  .poster-card { width: min(100%, 320px); }
  .steps { grid-template-columns: 1fr; }
  .scenes li, .stat-list li { grid-template-columns: 1fr; gap: 6px; }
  .flow { grid-template-columns: 1fr; }
  .flow-arrow { transform: rotate(90deg); justify-self: center; }
  .menu-btn { display: grid; place-items: center; }
  .nav-links {
    display: none;
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    padding: 10px 20px 16px;
    background: #f4f8fd;
    border-bottom: 1px solid var(--line);
    box-shadow: 0 18px 36px rgba(16, 42, 86, 0.08);
  }
  .nav.is-open .nav-links { display: flex; }
  .nav-links a { padding: 10px 0; }
  .metrics { grid-template-columns: repeat(2, 1fr); }
  .metrics article,
  .metrics article:nth-child(n + 5) { grid-column: auto; }
  .post-stats { grid-template-columns: repeat(2, 1fr); }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}