:root {
  color-scheme: light;
  --ink: #071827;
  --muted: #66758a;
  --subtle: #91a0b4;
  --line: rgba(15, 23, 42, 0.08);
  --blue: #0f6bff;
  --blue-dark: #004bd6;
  --shadow: 0 34px 100px rgba(15, 23, 42, 0.13);
}

* {
  box-sizing: border-box;
}

body {
  min-height: 100svh;
  margin: 0;
  overflow-x: hidden;
  background:
    radial-gradient(circle at 18% 18%, rgba(15, 107, 255, 0.08), transparent 28%),
    radial-gradient(circle at 82% 32%, rgba(125, 92, 255, 0.1), transparent 30%),
    linear-gradient(135deg, #ffffff 0%, #f8fbff 46%, #eef3ff 100%);
  color: var(--ink);
  font-family: "Inter", "Segoe UI", "Microsoft YaHei", sans-serif;
}

body::before {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(15, 107, 255, 0.032) 1px, transparent 1px),
    linear-gradient(90deg, rgba(15, 107, 255, 0.032) 1px, transparent 1px);
  background-size: 84px 84px;
  mask-image: linear-gradient(90deg, rgba(0, 0, 0, 0.32), transparent 74%);
  content: "";
}

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

.brand {
  position: fixed;
  top: 28px;
  left: clamp(28px, 5vw, 76px);
  z-index: 10;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  border: 1px solid rgba(255, 255, 255, 0.68);
  border-radius: 999px;
  padding: 8px 13px 8px 9px;
  background: rgba(255, 255, 255, 0.62);
  box-shadow: 0 14px 42px rgba(15, 23, 42, 0.07);
  font-size: 14px;
  font-weight: 1000;
  backdrop-filter: blur(18px);
}

.brand-mark {
  display: grid;
  width: 30px;
  height: 30px;
  place-items: center;
  border-radius: 10px;
  background: linear-gradient(135deg, #0f6bff, #19c2ff);
  color: #fff;
  box-shadow: 0 10px 24px rgba(15, 107, 255, 0.26);
}

.guide-page {
  position: relative;
  z-index: 1;
  width: min(1180px, 100%);
  margin: 0 auto;
  padding: 132px clamp(20px, 5vw, 72px) 64px;
}

.guide-hero {
  max-width: 880px;
}

.eyebrow {
  width: fit-content;
  margin: 0 0 22px;
  border: 1px solid rgba(15, 107, 255, 0.14);
  border-radius: 999px;
  padding: 8px 13px;
  background: rgba(255, 255, 255, 0.66);
  color: var(--blue);
  font-size: 12px;
  font-weight: 1000;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  box-shadow: 0 12px 34px rgba(15, 23, 42, 0.06);
}

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

h1 {
  max-width: 820px;
  margin-bottom: 0;
  color: #071827;
  font-size: clamp(48px, 6vw, 86px);
  line-height: 1.04;
  letter-spacing: -0.06em;
}

.guide-subtitle {
  max-width: 720px;
  margin: 28px 0 0;
  color: var(--muted);
  font-size: clamp(18px, 1.8vw, 22px);
  line-height: 1.8;
}

.guide-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}

.primary-action,
.secondary-action {
  display: inline-flex;
  min-height: 56px;
  align-items: center;
  justify-content: center;
  border-radius: 15px;
  padding: 0 24px;
  font-weight: 1000;
  transition: transform 160ms ease, box-shadow 160ms ease, background 160ms ease;
}

.primary-action {
  border: 1px solid var(--blue);
  background: linear-gradient(135deg, #0f6bff, #0056e8);
  color: #fff;
  box-shadow: 0 20px 46px rgba(15, 107, 255, 0.28);
}

.secondary-action {
  border: 1px solid rgba(15, 107, 255, 0.16);
  background: rgba(255, 255, 255, 0.66);
  color: var(--blue);
  backdrop-filter: blur(14px);
}

.primary-action:hover,
.secondary-action:hover,
.step-grid article:hover {
  transform: translateY(-2px);
}

.step-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
  margin-top: 58px;
}

.step-grid article,
.support-card,
.notice-card {
  border: 1px solid rgba(255, 255, 255, 0.74);
  border-radius: 28px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.92), rgba(255, 255, 255, 0.72));
  box-shadow: 0 22px 70px rgba(15, 23, 42, 0.1);
  backdrop-filter: blur(22px);
}

.step-grid article {
  display: grid;
  align-content: start;
  min-height: 268px;
  padding: 26px;
  transition: transform 160ms ease, box-shadow 160ms ease;
}

.step-grid span,
.support-card span {
  color: var(--blue);
  font-size: 14px;
  font-weight: 1000;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.step-grid h2 {
  margin: 18px 0 0;
  color: #071827;
  font-size: 24px;
  letter-spacing: -0.04em;
}

.step-grid p {
  margin: 14px 0 0;
  color: var(--muted);
  line-height: 1.72;
}

.step-grid a {
  width: fit-content;
  margin-top: 22px;
  color: var(--blue);
  font-weight: 1000;
}

.support-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  margin-top: 22px;
  padding: 30px 34px;
}

.support-card h2,
.notice-card h2 {
  margin: 10px 0 0;
  color: #071827;
  font-size: clamp(26px, 2.8vw, 38px);
  line-height: 1.16;
  letter-spacing: -0.045em;
}

.support-card p {
  max-width: 720px;
  margin: 12px 0 0;
  color: var(--muted);
  line-height: 1.7;
}

.support-card strong {
  border: 1px solid rgba(15, 107, 255, 0.16);
  border-radius: 999px;
  padding: 14px 18px;
  background: rgba(15, 107, 255, 0.06);
  color: var(--blue);
  font-size: 20px;
  white-space: nowrap;
}

.notice-card {
  margin-top: 22px;
  padding: 30px 34px;
}

.notice-card ul {
  display: grid;
  gap: 12px;
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
}

.notice-card li {
  position: relative;
  padding-left: 22px;
  color: var(--muted);
  line-height: 1.7;
}

.notice-card li::before {
  position: absolute;
  top: 11px;
  left: 0;
  width: 7px;
  height: 7px;
  border-radius: 999px;
  background: var(--blue);
  content: "";
}

@media (max-width: 980px) {
  .step-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .support-card {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (max-width: 620px) {
  .brand {
    top: 18px;
    left: 18px;
  }

  .guide-page {
    padding: 104px 18px 40px;
  }

  h1 {
    font-size: clamp(38px, 11vw, 54px);
  }

  .guide-actions,
  .step-grid {
    grid-template-columns: 1fr;
  }

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

  .step-grid article,
  .support-card,
  .notice-card {
    border-radius: 24px;
    padding: 24px;
  }
}