:root {
  --ink: #14211c;
  --muted: #63716b;
  --line: #dfe8e3;
  --paper: #ffffff;
  --soft: #f3f8f5;
  --brand: #00c990;
  --brand-dark: #008b65;
  --brand-pale: #dff8ee;
  --charcoal: #252a28;
  --shadow: 0 22px 70px rgba(20, 65, 50, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 8% 0%, rgba(0, 201, 144, 0.12), transparent 28rem),
    linear-gradient(180deg, #fbfdfc 0%, #f3f8f5 100%);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC",
    "Microsoft YaHei", "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
}

img {
  max-width: 100%;
}

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

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

.site-header {
  position: sticky;
  z-index: 20;
  top: 0;
  border-bottom: 1px solid rgba(223, 232, 227, 0.78);
  background: rgba(251, 253, 252, 0.88);
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
}

.nav {
  display: flex;
  min-height: 72px;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--ink);
  font-size: 19px;
  font-weight: 800;
  text-decoration: none;
  letter-spacing: 0.04em;
}

.brand img {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  box-shadow: 0 8px 22px rgba(0, 0, 0, 0.12);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-links a {
  color: var(--muted);
  font-size: 14px;
  font-weight: 650;
  text-decoration: none;
}

.nav-links a:hover,
.nav-links a:focus-visible {
  color: var(--brand-dark);
}

.hero {
  overflow: hidden;
  padding: 92px 0 72px;
}

.hero-grid {
  display: grid;
  align-items: center;
  grid-template-columns: minmax(0, 1.08fr) minmax(330px, 0.92fr);
  gap: 72px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin: 0 0 20px;
  color: var(--brand-dark);
  font-size: 14px;
  font-weight: 750;
}

.eyebrow::before {
  width: 30px;
  height: 2px;
  border-radius: 99px;
  background: var(--brand);
  content: "";
}

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

.hero h1 {
  max-width: 720px;
  margin-bottom: 24px;
  font-size: clamp(44px, 7vw, 78px);
  line-height: 1.04;
  letter-spacing: -0.055em;
}

.hero h1 span {
  color: var(--brand-dark);
}

.lead {
  max-width: 650px;
  margin-bottom: 32px;
  color: var(--muted);
  font-size: clamp(17px, 2.1vw, 20px);
  line-height: 1.85;
}

.hero-actions,
.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 0 22px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--paper);
  color: var(--ink);
  font-size: 15px;
  font-weight: 750;
  text-decoration: none;
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 12px 28px rgba(20, 65, 50, 0.12);
}

.button.primary {
  border-color: var(--brand);
  background: var(--brand);
  color: #052c20;
}

.hero-card {
  position: relative;
  width: min(430px, 100%);
  min-height: 445px;
  justify-self: end;
  padding: 46px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.7);
  border-radius: 42px;
  background:
    linear-gradient(150deg, rgba(37, 42, 40, 0.97), rgba(15, 73, 56, 0.98));
  box-shadow: var(--shadow);
  color: #fff;
}

.hero-card::after {
  position: absolute;
  right: -95px;
  bottom: -130px;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  background: rgba(0, 201, 144, 0.34);
  content: "";
  filter: blur(3px);
}

.hero-icon {
  position: relative;
  z-index: 1;
  width: 126px;
  height: 126px;
  margin-bottom: 52px;
  border-radius: 30px;
  box-shadow: 0 20px 44px rgba(0, 0, 0, 0.26);
}

.hero-card h2 {
  position: relative;
  z-index: 1;
  margin-bottom: 12px;
  font-size: 34px;
}

.hero-card p {
  position: relative;
  z-index: 1;
  color: rgba(255, 255, 255, 0.72);
  line-height: 1.8;
}

.section {
  padding: 78px 0;
}

.section-title {
  max-width: 700px;
  margin: 0 auto 44px;
  text-align: center;
}

.section-title h2 {
  margin-bottom: 14px;
  font-size: clamp(30px, 4vw, 46px);
  letter-spacing: -0.04em;
}

.section-title p {
  color: var(--muted);
  font-size: 17px;
  line-height: 1.8;
}

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

.feature-card,
.support-card,
.legal-card {
  border: 1px solid var(--line);
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.9);
  box-shadow: 0 14px 34px rgba(20, 65, 50, 0.055);
}

.feature-card {
  padding: 30px;
}

.feature-mark {
  display: grid;
  width: 48px;
  height: 48px;
  margin-bottom: 22px;
  place-items: center;
  border-radius: 15px;
  background: var(--brand-pale);
  color: var(--brand-dark);
  font-weight: 850;
}

.feature-card h3 {
  margin-bottom: 10px;
  font-size: 20px;
}

.feature-card p {
  margin-bottom: 0;
  color: var(--muted);
  line-height: 1.75;
}

.gallery {
  display: grid;
  align-items: start;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}

.screen {
  overflow: hidden;
  border: 9px solid var(--charcoal);
  border-radius: 34px;
  background: #fff;
  box-shadow: var(--shadow);
}

.screen img {
  display: block;
  width: 100%;
  height: auto;
}

.notice-band {
  margin: 34px auto 86px;
  padding: 44px;
  border-radius: 30px;
  background: var(--charcoal);
  color: #fff;
  text-align: center;
}

.notice-band h2 {
  margin-bottom: 12px;
  font-size: clamp(27px, 4vw, 40px);
}

.notice-band p {
  max-width: 680px;
  margin: 0 auto 24px;
  color: rgba(255, 255, 255, 0.72);
  line-height: 1.8;
}

.notice-band .button {
  border-color: var(--brand);
  background: var(--brand);
}

.site-footer {
  border-top: 1px solid var(--line);
  background: #edf4f0;
}

.footer-grid {
  display: grid;
  padding: 38px 0;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 26px;
}

.footer-brand {
  font-weight: 800;
}

.footer-meta {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.65;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 18px;
}

.footer-links a {
  color: var(--muted);
  font-size: 13px;
  text-decoration: none;
}

.page-hero {
  padding: 72px 0 38px;
}

.page-hero h1 {
  margin-bottom: 16px;
  font-size: clamp(36px, 6vw, 58px);
  letter-spacing: -0.05em;
}

.page-hero p {
  max-width: 750px;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.8;
}

.support-grid {
  display: grid;
  margin-bottom: 28px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.support-card {
  padding: 28px;
}

.support-card h2 {
  margin-bottom: 12px;
  font-size: 21px;
}

.support-card p,
.support-card li {
  color: var(--muted);
  line-height: 1.75;
}

.support-card ul {
  margin: 0;
  padding-left: 20px;
}

.support-contact {
  margin: 30px 0 80px;
  padding: 34px;
  border: 1px solid rgba(0, 201, 144, 0.28);
  border-radius: 24px;
  background: var(--brand-pale);
}

.support-contact h2 {
  margin-bottom: 10px;
}

.support-contact p {
  margin-bottom: 8px;
  color: #285c49;
  line-height: 1.75;
}

.support-contact a {
  color: var(--brand-dark);
  font-weight: 750;
}

.legal-layout {
  display: grid;
  padding-bottom: 76px;
  grid-template-columns: 240px minmax(0, 1fr);
  gap: 28px;
}

.legal-nav {
  position: sticky;
  top: 96px;
  align-self: start;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.86);
}

.legal-nav a {
  display: block;
  padding: 10px 12px;
  border-radius: 10px;
  color: var(--muted);
  font-size: 14px;
  text-decoration: none;
}

.legal-nav a:hover {
  background: var(--soft);
  color: var(--brand-dark);
}

.legal-card {
  padding: clamp(24px, 5vw, 52px);
}

.legal-card h2 {
  margin: 38px 0 14px;
  font-size: 22px;
}

.legal-card h2:first-of-type {
  margin-top: 0;
}

.legal-card h3 {
  margin: 24px 0 10px;
  font-size: 17px;
}

.legal-card p,
.legal-card li {
  color: #4f5e57;
  font-size: 15px;
  line-height: 1.9;
}

.legal-card ul,
.legal-card ol {
  padding-left: 22px;
}

.legal-meta {
  margin-bottom: 28px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
  line-height: 1.8;
}

.table-wrap {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th,
td {
  min-width: 130px;
  padding: 14px;
  border: 1px solid var(--line);
  color: #4f5e57;
  font-size: 14px;
  line-height: 1.65;
  text-align: left;
  vertical-align: top;
}

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

@media (max-width: 860px) {
  .hero {
    padding-top: 64px;
  }

  .hero-grid {
    grid-template-columns: 1fr;
    gap: 46px;
  }

  .hero-card {
    justify-self: start;
  }

  .feature-grid,
  .gallery {
    grid-template-columns: 1fr;
  }

  .gallery {
    width: min(390px, 100%);
    margin: 0 auto;
  }

  .legal-layout {
    grid-template-columns: 1fr;
  }

  .legal-nav {
    position: static;
    display: flex;
    overflow-x: auto;
    gap: 6px;
  }

  .legal-nav a {
    flex: 0 0 auto;
  }
}

@media (max-width: 640px) {
  .container {
    width: min(100% - 28px, 1120px);
  }

  .nav {
    min-height: 64px;
  }

  .nav-links a:not(:last-child) {
    display: none;
  }

  .hero h1 {
    font-size: 46px;
  }

  .hero-card {
    min-height: 390px;
    padding: 32px;
    border-radius: 30px;
  }

  .hero-icon {
    width: 104px;
    height: 104px;
    margin-bottom: 44px;
  }

  .section {
    padding: 58px 0;
  }

  .support-grid {
    grid-template-columns: 1fr;
  }

  .notice-band,
  .support-contact {
    padding: 28px 22px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
  }

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