:root {
  --green: #00c880;
  --green-700: #009963;
  --green-800: #08734f;
  --green-950: #073b2b;
  --ink: #111827;
  --muted: #667085;
  --line: #dfe7f0;
  --line-soft: #e8edf3;
  --wash: #f6f9fc;
  --soft-green: #e9fff5;
  --max: 1180px;
  --shadow: 0 24px 60px rgba(20, 32, 51, 0.10);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: #fff;
  font-family: Inter, "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  letter-spacing: 0;
}

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

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

.container {
  width: min(var(--max), calc(100% - 48px));
  margin: 0 auto;
}

.header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255,255,255,0.94);
  border-bottom: 1px solid var(--line-soft);
  backdrop-filter: blur(18px);
}

.header-inner {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}

.brand img {
  width: 166px;
  height: auto;
}

.nav {
  display: flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.btn {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 0 20px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
  font-size: 14px;
  font-weight: 900;
  text-decoration: none;
}

.btn.primary {
  border-color: transparent;
  background: linear-gradient(135deg, var(--green), var(--green-700));
  color: #fff;
  box-shadow: 0 12px 28px rgba(0, 153, 99, 0.18);
}

.mobile-menu {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
  color: var(--ink);
}

.mobile-menu span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 4px auto;
  border-radius: 2px;
  background: currentColor;
}

.mobile-platform-nav {
  display: none;
}

.application-hero {
  position: relative;
  overflow: hidden;
  padding: 92px 0 84px;
  border-bottom: 1px solid var(--line-soft);
  background:
    radial-gradient(circle at 84% 12%, rgba(0, 200, 128, 0.12), transparent 32%),
    linear-gradient(180deg, #f7fffb 0%, #ffffff 72%);
}

.application-hero::after {
  content: "";
  position: absolute;
  right: -12vw;
  bottom: -220px;
  width: 520px;
  height: 520px;
  border-radius: 50%;
  background: rgba(0, 200, 128, 0.08);
  pointer-events: none;
}

.application-hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(360px, 0.78fr);
  gap: 84px;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  margin-bottom: 22px;
  color: var(--green-800);
  font-size: 13px;
  line-height: 1;
  font-weight: 950;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  color: var(--ink);
  font-size: clamp(46px, 5.2vw, 74px);
  line-height: 1.05;
  font-weight: 950;
}

.hero-lead {
  max-width: 650px;
  margin: 24px 0 0;
  color: var(--muted);
  font-size: 19px;
  line-height: 1.72;
  font-weight: 700;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.hero-panel {
  position: relative;
  overflow: hidden;
  padding: 34px;
  border: 1px solid var(--line-soft);
  border-radius: 22px;
  background:
    radial-gradient(circle at 88% 8%, rgba(0, 200, 128, 0.12), transparent 34%),
    #fff;
  box-shadow: var(--shadow);
}

.hero-panel h2 {
  margin: 0 0 18px;
  color: var(--green-800);
  font-size: 22px;
  line-height: 1.25;
  font-weight: 950;
}

.hero-panel p {
  margin: 0 0 22px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.68;
  font-weight: 680;
}

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

.hero-path li {
  display: grid;
  grid-template-columns: 30px 1fr;
  gap: 12px;
  align-items: center;
  color: #2f3b4f;
  font-size: 14px;
  line-height: 1.35;
  font-weight: 850;
}

.hero-path span {
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  border-radius: 9px;
  background: var(--soft-green);
  color: var(--green-800);
  font-size: 13px;
  font-weight: 950;
}

.section {
  padding: 88px 0;
}

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

.section-head {
  max-width: 760px;
  margin-bottom: 42px;
}

.section-head.center {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.section-head h2 {
  margin: 0;
  color: var(--ink);
  font-size: clamp(34px, 4vw, 56px);
  line-height: 1.12;
  font-weight: 950;
}

.section-head p {
  margin: 16px 0 0;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.7;
  font-weight: 680;
}

.fit-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.fit-card,
.check-card {
  min-height: 176px;
  padding: 28px;
  border: 1px solid var(--line-soft);
  border-radius: 18px;
  background: #fff;
  box-shadow: 0 14px 34px rgba(20, 32, 51, 0.06);
}

.fit-card b,
.check-card b {
  display: block;
  margin-bottom: 10px;
  color: var(--ink);
  font-size: 22px;
  line-height: 1.24;
  font-weight: 950;
}

.fit-card span,
.check-card span {
  display: block;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.66;
  font-weight: 680;
}

.steps {
  display: grid;
  gap: 14px;
  counter-reset: step;
}

.step {
  position: relative;
  display: grid;
  grid-template-columns: 54px 1fr;
  gap: 22px;
  align-items: start;
  padding: 24px 28px;
  border: 1px solid var(--line-soft);
  border-radius: 18px;
  background: #fff;
  box-shadow: 0 12px 28px rgba(20, 32, 51, 0.05);
}

.step::before {
  counter-increment: step;
  content: counter(step);
  width: 54px;
  height: 54px;
  display: grid;
  place-items: center;
  border-radius: 16px;
  background: var(--soft-green);
  color: var(--green-800);
  font-size: 20px;
  font-weight: 950;
}

.step h3 {
  margin: 0 0 8px;
  color: var(--ink);
  font-size: 22px;
  line-height: 1.28;
  font-weight: 950;
}

.step p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.72;
  font-weight: 680;
}

.check-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.notice-band {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 24px;
  align-items: center;
  margin-top: 46px;
  padding: 26px 30px;
  border-radius: 20px;
  background:
    radial-gradient(circle at 90% 0%, rgba(255,255,255,0.20), transparent 34%),
    linear-gradient(135deg, var(--green-950), var(--green-800));
  color: #fff;
}

.notice-band h3 {
  margin: 0 0 8px;
  font-size: 24px;
  line-height: 1.25;
  font-weight: 950;
}

.notice-band p {
  margin: 0;
  color: rgba(255,255,255,0.74);
  font-size: 14px;
  line-height: 1.6;
  font-weight: 680;
}

.notice-band .btn {
  border-color: rgba(255,255,255,0.28);
  background: #fff;
  color: var(--green-800);
}

.download-section.application-download {
  border-top: 0;
}

@media (max-width: 980px) {
  .nav,
  .header-actions {
    display: none;
  }

  .mobile-menu {
    display: block;
  }

  .mobile-platform-nav.open {
    display: block;
    border-top: 1px solid var(--line-soft);
    background: rgba(255,255,255,0.98);
  }

  .mobile-platform-scroll {
    display: grid;
    grid-auto-flow: column;
    grid-auto-columns: minmax(220px, 1fr);
    gap: 12px;
    overflow-x: auto;
    padding: 16px 24px;
  }

  .mobile-nav-card {
    min-height: 96px;
    padding: 16px;
    border: 1px solid var(--line-soft);
    border-radius: 14px;
    background: #fff;
  }

  .mobile-nav-card b,
  .mobile-nav-card span {
    display: block;
  }

  .mobile-nav-card b {
    margin-bottom: 8px;
    color: var(--ink);
    font-size: 16px;
    font-weight: 950;
  }

  .mobile-nav-card span {
    color: var(--muted);
    font-size: 12px;
    line-height: 1.45;
    font-weight: 700;
  }

  .application-hero-grid,
  .fit-grid,
  .check-grid,
  .notice-band {
    grid-template-columns: 1fr;
  }

  .application-hero-grid {
    gap: 36px;
  }
}

@media (max-width: 640px) {
  .container {
    width: min(100% - 32px, var(--max));
  }

  .application-hero {
    padding: 50px 0 48px;
  }

  h1 {
    font-size: clamp(34px, 10vw, 40px);
    line-height: 1.12;
  }

  .hero-lead {
    font-size: 16px;
    line-height: 1.68;
  }

  .section {
    padding: 50px 0;
  }

  .section-head {
    margin-bottom: 24px;
  }

  .section-head h2 {
    font-size: 30px;
    line-height: 1.18;
  }

  .fit-grid,
  .check-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
  }

  .fit-card,
  .check-card {
    min-height: 0;
    padding: 18px;
    border-radius: 16px;
  }

  .fit-card b,
  .check-card b {
    margin-bottom: 8px;
    font-size: 18px;
  }

  .fit-card span,
  .check-card span {
    font-size: 13px;
    line-height: 1.55;
  }

  .steps {
    gap: 10px;
  }

  .step {
    grid-template-columns: 42px 1fr;
    gap: 14px;
    padding: 16px;
    border-radius: 16px;
  }

  .step::before {
    width: 42px;
    height: 42px;
    border-radius: 12px;
    font-size: 16px;
  }

  .step h3 {
    font-size: 19px;
  }

  .step p {
    font-size: 14px;
    line-height: 1.6;
  }

  .notice-band {
    gap: 16px;
    margin-top: 30px;
    padding: 22px;
  }
}

@media (max-width: 360px) {
  .fit-grid,
  .check-grid {
    grid-template-columns: 1fr;
  }
}