:root {
  --ink: #0f172a;
  --ink-2: #134e4a;
  --muted: #64748b;
  --paper: #f0fdfa;
  --paper-2: #ccfbf1;
  --indigo: #0d9488;
  --indigo-2: #115e59;
  --rose: #0891b2;
  --rose-2: #0e7490;
  --cyan: #14b8a6;
  --amber: #d97706;
  --line: rgba(15, 23, 42, 0.1);
  --white: #fafffe;
  --shadow: 0 26px 80px rgba(15, 23, 42, 0.16);
  --soft-shadow: 0 16px 44px rgba(15, 23, 42, 0.08);
  --radius-xl: 28px;
  --radius-lg: 18px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 100% 0%, rgba(13, 148, 136, 0.14), transparent 34rem),
    radial-gradient(circle at 0% 12%, rgba(8, 145, 178, 0.1), transparent 30rem),
    radial-gradient(circle at 50% 40%, rgba(20, 184, 166, 0.08), transparent 28rem),
    linear-gradient(180deg, #fafffe 0%, var(--paper) 48%, #e6fffa 100%);
  font-family: "HarmonyOS Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.7;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  display: block;
  max-width: 100%;
}

.site-shell {
  min-height: 100vh;
  overflow: hidden;
}

.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 16px clamp(20px, 5vw, 76px);
  border-bottom: 1px solid rgba(13, 148, 136, 0.1);
  background: rgba(250, 255, 254, 0.82);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-weight: 900;
  letter-spacing: 0.02em;
}

.brand-sub {
  display: block;
  margin-top: 2px;
  color: var(--muted);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.16em;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid rgba(13, 148, 136, 0.14);
  border-radius: 14px;
  box-shadow: 0 14px 30px rgba(13, 148, 136, 0.16);
}

.brand-mark img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 22px;
  color: rgba(15, 23, 42, 0.68);
  font-size: 14px;
  font-weight: 700;
}

.nav-links a {
  transition: color 0.2s ease, transform 0.2s ease;
}

.nav-links a:hover {
  color: var(--indigo);
  transform: translateY(-1px);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  color: var(--white);
  font-weight: 900;
  background: linear-gradient(135deg, var(--indigo), var(--indigo-2) 58%, var(--rose));
  border: 0;
  border-radius: 12px;
  box-shadow: 0 16px 32px rgba(13, 148, 136, 0.22);
}

.button.secondary {
  color: var(--indigo-2);
  background: rgba(255, 255, 255, 0.86);
  border: 1px solid rgba(13, 148, 136, 0.18);
  box-shadow: none;
}

.button.rose {
  background: linear-gradient(135deg, var(--rose), var(--rose-2));
  box-shadow: 0 16px 32px rgba(8, 145, 178, 0.22);
}

.hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(380px, 1fr);
  gap: clamp(32px, 5vw, 64px);
  align-items: center;
  padding: clamp(56px, 7vw, 108px) clamp(20px, 5vw, 76px) 36px;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 18px clamp(18px, 4vw, 58px) auto auto;
  width: min(52vw, 680px);
  height: min(52vw, 680px);
  background:
    linear-gradient(135deg, rgba(13, 148, 136, 0.1), rgba(8, 145, 178, 0.08), rgba(20, 184, 166, 0.1)),
    repeating-linear-gradient(90deg, rgba(15, 23, 42, 0.03) 0 1px, transparent 1px 20px);
  border-radius: 38% 62% 58% 42%;
  z-index: -1;
}

.hero-copy {
  max-width: 680px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 13px;
  color: var(--indigo);
  background: rgba(13, 148, 136, 0.08);
  border: 1px solid rgba(13, 148, 136, 0.14);
  border-radius: 10px;
  font-size: 13px;
  font-weight: 900;
}

.hero h1 {
  margin: 22px 0 18px;
  max-width: 720px;
  font-size: clamp(40px, 5.8vw, 76px);
  line-height: 1.06;
  letter-spacing: -0.04em;
}

.hero h1 em {
  font-style: normal;
  color: var(--rose);
}

.lead {
  max-width: 620px;
  margin: 0;
  color: var(--muted);
  font-size: clamp(16px, 1.7vw, 19px);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.hero-visual {
  position: relative;
  min-height: 520px;
}

.visual-card {
  position: relative;
  padding: 16px;
  background: rgba(255, 255, 255, 0.88);
  border: 1px solid rgba(255, 255, 255, 0.72);
  border-radius: 32px;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.hero-product {
  width: 100%;
  border-radius: 22px;
}

.floating-note {
  position: absolute;
  display: grid;
  gap: 4px;
  padding: 14px 16px;
  background: rgba(255, 255, 255, 0.94);
  border: 1px solid rgba(15, 23, 42, 0.08);
  border-radius: 14px;
  box-shadow: 0 16px 38px rgba(15, 23, 42, 0.12);
  backdrop-filter: blur(16px);
}

.floating-note strong {
  font-size: 14px;
}

.floating-note span {
  color: var(--muted);
  font-size: 12px;
}

.floating-note.one {
  top: 48px;
  left: -22px;
}

.floating-note.two {
  right: -18px;
  bottom: 72px;
}

.stat-bar {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin: 0 clamp(20px, 5vw, 76px) 12px;
  padding: 18px;
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid var(--line);
  border-radius: 20px;
  box-shadow: var(--soft-shadow);
}

.stat-bar strong {
  display: block;
  font-size: 22px;
  line-height: 1.1;
}

.stat-bar span {
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

.section {
  padding: clamp(56px, 8vw, 100px) clamp(20px, 5vw, 76px);
}

.section-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 28px;
}

.section-title {
  max-width: 780px;
  margin: 0;
  font-size: clamp(30px, 4.2vw, 52px);
  line-height: 1.14;
  letter-spacing: -0.04em;
}

.section-kicker {
  max-width: 400px;
  color: var(--muted);
  font-size: 15px;
}

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

.feature-card {
  min-height: 220px;
  padding: 26px;
  background: rgba(255, 255, 255, 0.84);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--soft-shadow);
}

.feature-card.accent {
  color: var(--white);
  background:
    radial-gradient(circle at 100% 0%, rgba(8, 145, 178, 0.28), transparent 42%),
    linear-gradient(145deg, var(--indigo-2), var(--indigo) 58%, #0f766e);
  border-color: rgba(255, 255, 255, 0.14);
}

.feature-card.accent p {
  color: rgba(250, 255, 254, 0.76);
}

.feature-num {
  display: inline-block;
  margin-bottom: 14px;
  color: var(--indigo);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0.12em;
}

.feature-card.accent .feature-num {
  color: rgba(250, 255, 254, 0.72);
}

.feature-card h3 {
  margin: 0 0 10px;
  font-size: 22px;
}

.feature-card p {
  margin: 0;
  color: var(--muted);
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}

.tag {
  padding: 7px 10px;
  color: var(--indigo-2);
  background: rgba(13, 148, 136, 0.08);
  border: 1px solid rgba(13, 148, 136, 0.1);
  border-radius: 8px;
  font-size: 12px;
  font-weight: 800;
}

.feature-card.accent .tag {
  color: var(--white);
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.16);
}

.scene-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.scene {
  padding: 24px;
  min-height: 190px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.94), rgba(204, 251, 241, 0.88));
  border: 1px solid var(--line);
  border-radius: 20px;
  box-shadow: var(--soft-shadow);
}

.scene h3 {
  margin: 0 0 8px;
  color: var(--indigo-2);
}

.scene p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.split {
  display: grid;
  grid-template-columns: 0.92fr 1.08fr;
  gap: 18px;
  align-items: stretch;
}

.deep-panel {
  padding: clamp(34px, 5vw, 52px);
  color: var(--white);
  background:
    radial-gradient(circle at 92% 8%, rgba(8, 145, 178, 0.22), transparent 32%),
    radial-gradient(circle at 10% 0%, rgba(20, 184, 166, 0.24), transparent 34%),
    linear-gradient(135deg, var(--ink), var(--indigo-2));
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow);
}

.deep-panel p {
  color: rgba(250, 255, 254, 0.76);
}

.check-list {
  display: grid;
  gap: 12px;
  padding: 0;
  margin: 22px 0 0;
  list-style: none;
}

.check-list li {
  padding: 12px 14px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 14px;
}

.card {
  padding: 28px;
  background: rgba(255, 255, 255, 0.86);
  border: 1px solid var(--line);
  border-radius: 24px;
  box-shadow: var(--soft-shadow);
}

.card h3 {
  margin: 0 0 10px;
  font-size: 22px;
}

.card p {
  margin: 0 0 12px;
  color: var(--muted);
}

.download-strip {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 24px;
  align-items: center;
  padding: clamp(34px, 5vw, 50px);
  color: var(--white);
  background:
    radial-gradient(circle at 12% 12%, rgba(20, 184, 166, 0.24), transparent 30%),
    radial-gradient(circle at 88% 12%, rgba(8, 145, 178, 0.18), transparent 34%),
    linear-gradient(135deg, var(--ink), var(--indigo-2) 62%, #134e4a);
  border-radius: 32px;
  box-shadow: var(--shadow);
}

.download-strip h2 {
  margin: 0 0 8px;
  font-size: clamp(28px, 3.8vw, 46px);
  line-height: 1.12;
}

.download-strip p {
  margin: 0;
  color: rgba(250, 255, 254, 0.76);
}

.doc-layout {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  gap: 28px;
  padding: 46px clamp(20px, 5vw, 76px) 80px;
}

.doc-sidebar {
  position: sticky;
  top: 92px;
  align-self: start;
  padding: 20px;
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid var(--line);
  border-radius: 20px;
}

.doc-sidebar a {
  display: block;
  padding: 8px 0;
  color: var(--muted);
  font-size: 14px;
  font-weight: 800;
}

.doc {
  padding: clamp(28px, 5vw, 50px);
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid var(--line);
  border-radius: 28px;
  box-shadow: var(--shadow);
}

.doc h1 {
  margin: 0 0 10px;
  font-size: clamp(32px, 4.8vw, 52px);
  line-height: 1.1;
}

.doc h2 {
  margin-top: 34px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
}

.doc p,
.doc li {
  color: #475569;
}

.doc table {
  width: 100%;
  border-collapse: collapse;
  margin: 18px 0;
}

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

.doc th {
  background: rgba(13, 148, 136, 0.08);
}

.footer {
  padding: 36px clamp(20px, 5vw, 76px);
  color: rgba(250, 255, 254, 0.7);
  background: var(--ink);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr repeat(3, 1fr);
  gap: 22px;
}

.footer a {
  display: block;
  margin: 6px 0;
  color: rgba(250, 255, 254, 0.84);
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.footer-brand img {
  width: 52px;
  height: 52px;
  flex: 0 0 auto;
  object-fit: cover;
  border-radius: 14px;
  box-shadow: 0 16px 34px rgba(0, 0, 0, 0.24);
}

.footer-copy {
  margin-top: 24px;
  padding-top: 18px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: rgba(250, 255, 254, 0.56);
  font-size: 13px;
}

.footer-copy a {
  color: rgba(250, 255, 254, 0.72);
}

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

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
  margin: 24px 0;
}

@media (max-width: 980px) {
  .nav {
    align-items: flex-start;
    flex-direction: column;
  }

  .nav-links {
    flex-wrap: wrap;
  }

  .hero,
  .split,
  .download-strip,
  .doc-layout,
  .footer-grid,
  .stat-bar,
  .feature-grid,
  .scene-grid {
    grid-template-columns: 1fr;
  }

  .hero-visual {
    min-height: auto;
  }

  .section-head {
    align-items: flex-start;
    flex-direction: column;
  }

  .floating-note {
    position: static;
    margin-top: 12px;
  }

  .doc-sidebar {
    position: static;
  }
}

@media (max-width: 560px) {
  .hero {
    padding-top: 36px;
  }

  .hero h1 {
    font-size: 38px;
  }

  .nav-links .button {
    width: 100%;
  }
}