:root {
  --ink: #1d1d1f;
  --ink-soft: #3f3f46;
  --muted: #6e6e73;
  --soft: #f5f5f7;
  --paper: #ffffff;
  --line: #d2d2d7;
  --accent: #0071e3;
  --accent-dark: #005bb8;
  --green: #248a63;
  --green-soft: #e8f5ef;
  --warn: #b3261e;
  --warn-soft: #fff1ef;
  --gold: #a56a00;
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  background: var(--soft);
  color: var(--ink);
  font-family: "PingFang SC", "Microsoft YaHei UI", "Microsoft YaHei", SimSun, sans-serif;
  font-size: 16px;
  line-height: 1.65;
}

body {
  margin: 0;
  min-width: 320px;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  color: var(--accent-dark);
  text-decoration: underline;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid rgba(210, 210, 215, 0.7);
  background: rgba(251, 251, 253, 0.82);
  backdrop-filter: saturate(180%) blur(20px);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  width: min(1180px, calc(100% - 44px));
  min-height: 52px;
  margin: 0 auto;
}

.brand {
  display: flex;
  align-items: center;
  gap: 9px;
  min-width: 148px;
  color: var(--ink);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 24px;
  height: 24px;
  border: 1px solid rgba(0, 0, 0, 0.08);
  border-radius: 6px;
  background: #111;
  color: #fff;
  font-size: 13px;
  font-weight: 800;
}

.nav-links {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 6px;
  flex-wrap: wrap;
}

.nav-links a {
  border-radius: 999px;
  padding: 5px 10px;
  color: #424245;
  font-size: 13px;
  white-space: nowrap;
}

.nav-links a[aria-current="page"],
.nav-links a:hover {
  background: rgba(0, 0, 0, 0.06);
  color: var(--ink);
  text-decoration: none;
}

.hero {
  border-bottom: 1px solid var(--line);
  background: var(--paper);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.86fr) minmax(360px, 0.72fr);
  gap: 56px;
  align-items: center;
  width: min(1180px, calc(100% - 44px));
  min-height: 650px;
  margin: 0 auto;
  padding: 64px 0 58px;
}

.hero-main {
  padding-top: 20px;
}

.eyebrow,
.hero-overline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid rgba(0, 113, 227, 0.16);
  border-radius: 999px;
  padding: 5px 11px;
  background: rgba(0, 113, 227, 0.07);
  color: var(--accent-dark);
  font-size: 13px;
  font-weight: 700;
}

.eyebrow::before,
.hero-overline::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
}

h1,
h2,
h3 {
  margin: 0;
  letter-spacing: 0;
  line-height: 1.08;
}

h1 {
  max-width: 760px;
  margin-top: 18px;
  font-size: 76px;
  font-weight: 800;
}

.lead {
  max-width: 720px;
  margin: 22px 0 0;
  color: var(--muted);
  font-size: 22px;
  line-height: 1.45;
}

.cta-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 32px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 9px 18px;
  background: var(--paper);
  color: var(--accent);
  font-size: 15px;
  font-weight: 700;
}

.button.primary {
  border-color: var(--accent);
  background: var(--accent);
  color: #fff;
}

.button:hover {
  text-decoration: none;
  transform: translateY(-1px);
}

.product-showcase {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 560px;
}

.phone-shell {
  width: 344px;
  min-height: 520px;
  border: 8px solid #111;
  border-radius: 40px;
  background: #111;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.phone-screen {
  min-height: 504px;
  border-radius: 30px;
  background: linear-gradient(180deg, #fbfbfd 0%, #f5f5f7 100%);
  overflow: hidden;
}

.phone-status {
  display: flex;
  justify-content: space-between;
  padding: 14px 18px 6px;
  color: #1d1d1f;
  font-size: 12px;
  font-weight: 700;
}

.phone-app {
  padding: 16px;
}

.app-titlebar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}

.app-titlebar strong {
  font-size: 24px;
  line-height: 1;
}

.user-badge {
  border: 1px solid rgba(0, 113, 227, 0.22);
  border-radius: 999px;
  padding: 3px 9px;
  background: rgba(0, 113, 227, 0.08);
  color: var(--accent-dark);
  font-size: 12px;
  font-weight: 700;
}

.voice-panel {
  display: grid;
  grid-template-columns: 82px minmax(0, 1fr);
  gap: 14px;
  align-items: center;
  margin-top: 18px;
  border: 1px solid rgba(0, 0, 0, 0.08);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.84);
  padding: 16px;
  box-shadow: 0 10px 26px rgba(0, 0, 0, 0.06);
}

.voice-orb {
  display: grid;
  place-items: center;
  width: 82px;
  height: 82px;
  border: 1px solid rgba(36, 138, 99, 0.18);
  border-radius: 50%;
  background: #eefaf5;
}

.wave {
  display: flex;
  align-items: center;
  gap: 4px;
  height: 38px;
}

.wave span {
  display: block;
  width: 5px;
  border-radius: 999px;
  background: #18b77a;
}

.wave span:nth-child(1),
.wave span:nth-child(7) {
  height: 14px;
}

.wave span:nth-child(2),
.wave span:nth-child(6) {
  height: 24px;
}

.wave span:nth-child(3),
.wave span:nth-child(5) {
  height: 34px;
}

.wave span:nth-child(4) {
  height: 42px;
}

.voice-copy strong {
  display: block;
  color: #16805a;
  font-size: 24px;
  line-height: 1.15;
}

.voice-copy span {
  display: block;
  margin-top: 5px;
  color: var(--muted);
  font-size: 13px;
}

.hint-strip {
  margin-top: 10px;
  border-radius: 8px;
  background: #eaf7f1;
  color: #2d725b;
  padding: 7px 10px;
  text-align: center;
  font-size: 13px;
  font-weight: 700;
}

.chat-preview {
  display: grid;
  gap: 12px;
  margin-top: 14px;
}

.chat-row {
  display: flex;
  align-items: flex-start;
  gap: 8px;
}

.chat-row.user {
  justify-content: flex-end;
}

.chat-row img {
  width: 34px;
  height: 34px;
  border-radius: 8px;
}

.bubble {
  max-width: 236px;
  border-radius: 8px;
  padding: 9px 12px;
  color: #1d1d1f;
  font-size: 14px;
  line-height: 1.45;
}

.assistant .bubble {
  background: #fff;
  border: 1px solid rgba(0, 0, 0, 0.05);
}

.user .bubble {
  background: #dbeaff;
}

.hero-panel {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
  box-shadow: 0 14px 36px rgba(0, 0, 0, 0.08);
  overflow: hidden;
}

.panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 16px 18px;
  border-bottom: 1px solid var(--line);
  background: #fbfbfd;
}

.panel-title {
  color: var(--ink);
  font-weight: 800;
}

.status-pill {
  border-radius: 999px;
  padding: 4px 10px;
  background: #fff4df;
  color: var(--gold);
  font-size: 12px;
  font-weight: 700;
}

.panel-body {
  display: grid;
  gap: 0;
  padding: 0 18px;
}

.fact {
  display: grid;
  gap: 3px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

.fact:last-child {
  border-bottom: 0;
}

.fact small {
  color: var(--muted);
}

.fact strong {
  font-size: 18px;
}

.section {
  background: var(--soft);
}

.section.alt {
  background: var(--paper);
}

.wrap {
  width: min(1180px, calc(100% - 44px));
  margin: 0 auto;
  padding: 72px 0;
}

.section-title {
  display: grid;
  grid-template-columns: minmax(0, 0.52fr) minmax(0, 0.84fr);
  gap: 44px;
  align-items: end;
  margin-bottom: 28px;
}

.section-title p {
  margin: 0;
  color: var(--muted);
  font-size: 19px;
  line-height: 1.5;
}

h2 {
  font-size: 44px;
  font-weight: 800;
}

h3 {
  font-size: 22px;
  font-weight: 800;
}

.split-grid,
.cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.cards.two {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.info-card {
  min-height: 230px;
  border: 1px solid rgba(0, 0, 0, 0.04);
  border-radius: 8px;
  background: var(--paper);
  padding: 28px;
}

.section.alt .info-card {
  background: var(--soft);
}

.info-card p,
.text-page p,
.text-page li {
  color: var(--muted);
}

.info-card p {
  margin: 12px 0 0;
  font-size: 17px;
  line-height: 1.55;
}

.number {
  display: inline-grid;
  place-items: center;
  width: 30px;
  height: 30px;
  margin-bottom: 26px;
  border-radius: 50%;
  background: var(--ink);
  color: #fff;
  font-size: 14px;
  font-weight: 800;
}

.notice {
  border: 1px solid rgba(179, 38, 30, 0.16);
  border-radius: 8px;
  background: var(--warn-soft);
  padding: 22px 24px;
  color: #5c1f1a;
  font-size: 17px;
}

.notice strong {
  color: var(--warn);
}

.text-page {
  width: min(960px, calc(100% - 44px));
  margin: 0 auto;
  padding: 72px 0 88px;
}

.text-page header {
  margin-bottom: 34px;
  text-align: left;
}

.text-page h1 {
  max-width: 920px;
  font-size: 56px;
  font-weight: 800;
}

.meta {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 20px;
  color: var(--muted);
  font-size: 13px;
}

.meta span {
  border: 1px solid rgba(0, 0, 0, 0.08);
  border-radius: 999px;
  padding: 4px 10px;
  background: #fff;
}

.text-block {
  margin-top: 14px;
  border: 1px solid rgba(0, 0, 0, 0.05);
  border-radius: 8px;
  background: var(--paper);
  padding: 30px;
}

.text-block h2 {
  margin-bottom: 14px;
  font-size: 27px;
  line-height: 1.2;
}

.text-block h3 {
  margin-top: 22px;
  margin-bottom: 8px;
  font-size: 19px;
}

.text-block p {
  margin: 10px 0 0;
}

.text-block ul {
  margin: 10px 0 0;
  padding-left: 22px;
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
}

table {
  width: 100%;
  min-width: 640px;
  border-collapse: collapse;
}

th,
td {
  border-bottom: 1px solid var(--line);
  padding: 14px 16px;
  text-align: left;
  vertical-align: top;
}

th {
  background: #f5f5f7;
  color: var(--ink);
}

tr:last-child td {
  border-bottom: 0;
}

.footer {
  border-top: 1px solid var(--line);
  background: var(--soft);
  color: var(--muted);
}

.footer .wrap {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
  padding: 30px 0;
}

.footer a {
  color: #424245;
}

.footer-links {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

@media (max-width: 900px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 36px;
    min-height: 0;
  }

  h1 {
    font-size: 58px;
  }

  .lead {
    font-size: 20px;
  }

  .product-showcase {
    min-height: 0;
  }

  .section-title,
  .split-grid,
  .cards,
  .cards.two {
    grid-template-columns: 1fr;
  }

  .info-card {
    min-height: 0;
  }

  .text-page h1 {
    font-size: 44px;
  }
}

@media (max-width: 560px) {
  .nav,
  .hero-grid,
  .wrap,
  .text-page {
    width: min(100% - 28px, 1180px);
  }

  .nav {
    align-items: flex-start;
    flex-direction: column;
    padding: 12px 0;
  }

  .nav-links {
    justify-content: flex-start;
  }

  .nav-links a {
    padding: 4px 8px;
  }

  .hero-grid {
    padding: 42px 0 36px;
  }

  h1 {
    font-size: 42px;
  }

  h2 {
    font-size: 32px;
  }

  .lead {
    font-size: 18px;
  }

  .phone-shell {
    width: 100%;
    max-width: 344px;
  }

  .voice-panel {
    grid-template-columns: 1fr;
  }

  .text-page h1 {
    font-size: 34px;
  }

  .text-block,
  .info-card {
    padding: 22px;
  }
}