:root {
  --brand: #f89a3d;
  --brand-dark: #e88424;
  --gold: #ffd98a;
  --ink: #1f2933;
  --muted: #667085;
  --line: rgba(24, 32, 46, 0.11);
  --paper: #ffffff;
  --soft: #fff4e6;
  --teal: #21c7a8;
  --blue: #4c8dff;
  --dark: #14211f;
  --dark-2: #1d2934;
  --page: #f6f8fb;
  --shadow: 0 16px 42px rgba(15, 23, 42, 0.1);
  color-scheme: light;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  font-family:
    "Inter", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial,
    sans-serif;
  background: var(--page);
}

body.nav-open {
  overflow: hidden;
}

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

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

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 72px;
  padding: 14px clamp(20px, 5vw, 72px);
  background: rgba(16, 28, 31, 0.82);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(18px);
  color: #fff;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 18px;
  font-weight: 900;
  white-space: nowrap;
}

.brand img {
  width: 38px;
  height: 38px;
  border-radius: 8px;
  object-fit: cover;
}

.site-nav {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  flex-wrap: wrap;
  gap: 8px;
}

.site-nav a {
  padding: 9px 12px;
  border-radius: 8px;
  color: rgba(255, 255, 255, 0.78);
  font-size: 14px;
  font-weight: 700;
}

.site-nav a:hover,
.site-nav a.active {
  color: #fff;
  background: rgba(255, 255, 255, 0.1);
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
}

.hero {
  position: relative;
  min-height: 660px;
  padding: 128px clamp(20px, 5vw, 72px) 64px;
  overflow: hidden;
  color: #fff;
  background:
    linear-gradient(135deg, rgba(15, 32, 30, 0.98), rgba(28, 40, 52, 0.94)),
    #12201f;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(to bottom, #000 0%, transparent 88%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(320px, 520px);
  gap: clamp(32px, 6vw, 96px);
  align-items: center;
  max-width: 1220px;
  margin: 0 auto;
}

.hero-copy {
  max-width: 660px;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--gold);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 22px;
  font-size: clamp(52px, 8vw, 92px);
  line-height: 0.98;
  letter-spacing: 0;
}

.hero-subtitle {
  margin-bottom: 24px;
  max-width: 620px;
  color: rgba(255, 255, 255, 0.78);
  font-size: 20px;
  line-height: 1.8;
}

.hero-summary {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0 0 26px;
}

.hero-summary span {
  padding: 8px 12px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 8px;
  color: rgba(255, 255, 255, 0.86);
  background: rgba(255, 255, 255, 0.07);
  font-size: 14px;
  font-weight: 800;
}

.hero-actions,
.download-buttons,
.contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.primary-btn,
.secondary-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 48px;
  padding: 0 20px;
  border-radius: 8px;
  font-weight: 900;
  white-space: nowrap;
}

.primary-btn {
  color: #fff;
  background: linear-gradient(135deg, var(--brand), var(--brand-dark));
  box-shadow: 0 14px 30px rgba(248, 154, 61, 0.26);
}

.secondary-btn {
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.22);
  background: rgba(255, 255, 255, 0.1);
}

.secondary-btn.light {
  color: var(--ink);
  border-color: var(--line);
  background: #fff;
}

.download-note {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
  color: rgba(255, 255, 255, 0.62);
  font-size: 13px;
}

.download-note span {
  padding: 6px 10px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.06);
}

.hero-panel {
  padding: 28px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.09);
  box-shadow: 0 24px 56px rgba(0, 0, 0, 0.18);
  backdrop-filter: blur(18px);
}

.hero-panel-header {
  padding-bottom: 20px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.hero-panel-header span,
.company-card span {
  display: block;
  margin-bottom: 8px;
  color: rgba(255, 255, 255, 0.62);
  font-size: 13px;
  font-weight: 800;
}

.hero-panel-header strong {
  display: block;
  font-size: 26px;
  line-height: 1.25;
}

.hero-panel-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin: 20px 0;
}

.hero-panel-grid div {
  min-height: 128px;
  padding: 18px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.08);
}

.hero-panel-grid svg {
  color: var(--gold);
}

.hero-panel-grid strong,
.hero-panel-grid span {
  display: block;
}

.hero-panel-grid strong {
  margin: 18px 0 8px;
  font-size: 17px;
}

.hero-panel-grid span {
  color: rgba(255, 255, 255, 0.66);
  font-size: 13px;
  line-height: 1.6;
}

.section {
  padding: 68px clamp(20px, 5vw, 72px);
}

.section-heading {
  max-width: 720px;
  margin: 0 auto 30px;
  text-align: center;
}

.section-heading h2,
.download-panel h2,
.contact-panel h2 {
  margin-bottom: 14px;
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.12;
  letter-spacing: 0;
}

.section-heading p,
.download-panel p,
.contact-panel p {
  color: var(--muted);
  font-size: 16px;
  line-height: 1.75;
}

.intro-band {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  max-width: 1120px;
  margin: -28px auto 0;
  padding: 0;
  position: relative;
  z-index: 3;
  overflow: hidden;
  border-radius: 8px;
  background: var(--line);
  box-shadow: var(--shadow);
}

.metric {
  min-height: 118px;
  padding: 24px;
  background: #fff;
}

.metric strong {
  display: block;
  margin-bottom: 8px;
  font-size: 24px;
}

.metric span {
  color: var(--muted);
  line-height: 1.6;
}

.feature-grid,
.value-grid,
.scenario-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
  max-width: 1120px;
  margin: 0 auto;
}

.feature-card,
.value-item,
.scenario {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.05);
}

.feature-card i,
.feature-card > svg,
.value-item i,
.value-item > svg {
  width: 38px;
  height: 38px;
  padding: 8px;
  border-radius: 8px;
  color: var(--brand-dark);
  background: var(--soft);
}

.feature-card h3,
.value-item h3,
.scenario h3 {
  margin: 18px 0 10px;
  font-size: 20px;
}

.feature-card p,
.value-item p,
.scenario p {
  margin-bottom: 0;
  color: var(--muted);
  line-height: 1.8;
}

.product-band,
.promise-band {
  color: #fff;
  background:
    linear-gradient(135deg, rgba(18, 31, 29, 0.98), rgba(30, 43, 51, 0.95)),
    #14211f;
}

.product-band .section-heading p,
.promise-band p,
.promise-band .section-heading p {
  color: rgba(255, 255, 255, 0.72);
}

.scenario {
  border-color: rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.08);
  box-shadow: none;
}

.scenario span,
.promise-list span {
  color: var(--teal);
  font-size: 13px;
  font-weight: 900;
}

.download-panel,
.contact-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 28px;
  align-items: center;
  max-width: 1120px;
  margin: 68px auto;
  padding: 36px;
  border-radius: 8px;
  background:
    linear-gradient(135deg, rgba(255, 246, 234, 0.98), rgba(238, 250, 247, 0.98)),
    #fff;
  box-shadow: var(--shadow);
}

.contact-panel {
  grid-template-columns: 1fr;
  justify-items: center;
  text-align: center;
}

.contact-panel p {
  max-width: 780px;
}

.download-panel {
  margin-top: 56px;
}

.site-footer {
  display: grid;
  gap: 24px;
  padding: 34px clamp(20px, 5vw, 72px);
  color: rgba(255, 255, 255, 0.78);
  background: #101b1f;
}

.footer-main {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
}

.site-footer strong {
  display: block;
  color: #fff;
  margin-bottom: 6px;
}

.site-footer p {
  margin-bottom: 0;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  font-weight: 700;
}

.footer-links a:hover {
  color: #fff;
}

.footer-info {
  display: grid;
  gap: 8px;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.62);
  font-size: 13px;
  line-height: 1.7;
}

.about-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 420px);
  gap: clamp(28px, 6vw, 80px);
  align-items: center;
  min-height: 560px;
  padding: 128px clamp(20px, 5vw, 72px) 64px;
  color: #fff;
  background:
    linear-gradient(135deg, rgba(15, 32, 30, 0.98), rgba(36, 45, 59, 0.92)),
    #12201f;
}

.about-hero-copy {
  max-width: 780px;
}

.about-hero h1 {
  font-size: clamp(42px, 6vw, 72px);
}

.about-hero p {
  color: rgba(255, 255, 255, 0.76);
  font-size: 18px;
  line-height: 1.9;
}

.about-hero .eyebrow {
  color: var(--gold);
  font-size: 13px;
}

.company-card {
  display: grid;
  gap: 14px;
  padding: 28px;
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(255, 255, 255, 0.08);
  box-shadow: 0 28px 70px rgba(0, 0, 0, 0.22);
  backdrop-filter: blur(18px);
}

.company-card div {
  padding-bottom: 14px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.company-card div:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.company-card strong {
  display: block;
  color: #fff;
  font-size: 17px;
  line-height: 1.7;
}

.about-section {
  background: var(--page);
}

.app-intro-section {
  padding-bottom: 0;
}

.app-intro-card {
  display: block;
  max-width: 1120px;
  margin: 0 auto;
  padding: 34px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: var(--shadow);
  text-align: center;
}

.app-intro-card h2 {
  margin-bottom: 18px;
  font-size: clamp(30px, 4vw, 44px);
  line-height: 1.14;
}

.app-intro-card p:last-child {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.9;
  text-align: left;
}

.promise-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
  max-width: 1120px;
  margin: 0 auto;
}

.promise-list div {
  padding: 24px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.07);
}

.promise-list strong {
  display: block;
  margin: 10px 0 8px;
  font-size: 20px;
}

svg {
  width: 20px;
  height: 20px;
  stroke-width: 2.3;
}

@media (max-width: 920px) {
  .site-header {
    min-height: 64px;
  }

  .nav-toggle {
    display: grid;
  }

  .site-nav {
    position: fixed;
    top: 64px;
    left: 14px;
    right: 14px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 10px;
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 8px;
    background: rgba(12, 18, 29, 0.96);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.28);
  }

  .nav-open .site-nav {
    display: flex;
  }

  .hero,
  .about-hero {
    padding-top: 104px;
  }

  .hero-content,
  .about-hero,
  .app-intro-card,
  .download-panel,
  .contact-panel {
    grid-template-columns: 1fr;
  }

  .feature-grid,
  .value-grid,
  .scenario-grid,
  .promise-list,
  .intro-band {
    grid-template-columns: 1fr;
  }

  .download-panel,
  .contact-panel {
    margin: 48px 20px;
    padding: 28px;
  }

  .site-footer {
    align-items: stretch;
  }

  .footer-main {
    flex-direction: column;
  }
}

@media (max-width: 560px) {
  .hero {
    min-height: auto;
    padding-bottom: 52px;
  }

  h1 {
    font-size: 48px;
  }

  .hero-subtitle {
    font-size: 17px;
  }

  .primary-btn,
  .secondary-btn {
    width: 100%;
  }

  .hero-panel,
  .company-card {
    padding: 22px;
  }

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

  .section {
    padding-top: 58px;
    padding-bottom: 58px;
  }

  .feature-card,
  .value-item,
  .scenario,
  .metric {
    padding: 22px;
  }

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