:root {
  color-scheme: light;
  --bg: #f6f8f7;
  --paper: #ffffff;
  --ink: #17211f;
  --muted: #60706c;
  --line: #d9e3df;
  --primary: #087f6d;
  --primary-soft: #e5f4f0;
  --warn: #8a5a00;
  --warn-bg: #fff6dd;
  --danger: #9b2c2c;
  --danger-bg: #fff0f0;
  --shadow: 0 14px 34px rgba(18, 42, 36, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family:
    -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", sans-serif;
  line-height: 1.65;
}

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

a {
  color: inherit;
}

.hero {
  background: linear-gradient(135deg, #f7fbfa 0%, #e7f4f0 100%);
  border-bottom: 1px solid var(--line);
}

.hero__inner,
main,
.footer {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
}

.hero__inner {
  padding: 44px 0 34px;
}

.eyebrow,
.step {
  margin: 0 0 8px;
  color: var(--primary);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.brand-lockup {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

.brand-lockup img {
  width: 48px;
  height: 48px;
  border-radius: 8px;
  object-fit: contain;
}

.brand-lockup .eyebrow {
  margin: 0;
}

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

h1 {
  margin-bottom: 14px;
  font-size: clamp(2.1rem, 8vw, 4rem);
  line-height: 1.05;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 10px;
  font-size: clamp(1.45rem, 4vw, 2.2rem);
  line-height: 1.18;
}

h3 {
  margin-bottom: 10px;
  font-size: 1.05rem;
}

.lead {
  max-width: 760px;
  color: #30413d;
  font-size: 1.05rem;
}

.meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 22px;
}

.meta-row span,
.toc a {
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.75);
  padding: 7px 12px;
  color: #324641;
  font-size: 0.86rem;
}

.toc {
  position: sticky;
  top: 0;
  z-index: 2;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 12px max(16px, calc((100% - 1120px) / 2));
  background: rgba(246, 248, 247, 0.92);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(12px);
}

.toc a {
  flex: 0 0 auto;
  text-decoration: none;
  white-space: nowrap;
}

main {
  padding: 28px 0 54px;
}

.notice,
.section {
  margin: 0 0 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
  box-shadow: var(--shadow);
}

.notice {
  padding: 22px;
}

.notice h2 {
  font-size: 1.25rem;
}

.section {
  padding: 24px;
  scroll-margin-top: 84px;
}

.section__head {
  max-width: 800px;
  margin-bottom: 20px;
}

.section__head p:not(.step) {
  color: var(--muted);
}

.guide-grid {
  display: grid;
  gap: 18px;
}

.copy-card,
.note-block,
.todo {
  border-radius: 8px;
  padding: 16px;
}

.copy-card,
.note-block {
  border: 1px solid var(--line);
  background: #fbfdfc;
}

.copy-card.danger {
  border-color: #f0bbbb;
  background: var(--danger-bg);
}

.copy-card.danger h3 {
  color: var(--danger);
}

ul,
ol {
  margin: 0;
  padding-left: 1.15rem;
}

li + li {
  margin-top: 6px;
}

.steps {
  display: grid;
  gap: 10px;
  margin: 0 0 20px;
  padding: 0;
  list-style: none;
  counter-reset: steps;
}

.steps li {
  position: relative;
  min-height: 38px;
  margin: 0;
  padding: 10px 12px 10px 48px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfdfc;
}

.steps li::before {
  position: absolute;
  top: 10px;
  left: 12px;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  content: counter(steps);
  counter-increment: steps;
  font-size: 0.78rem;
  font-weight: 800;
  line-height: 24px;
  text-align: center;
}

.shot-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 14px;
  align-items: start;
}

.shot-grid.four {
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}

.shot {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fafdfe;
  padding: 10px;
}

.shot img {
  width: min(100%, 280px);
  margin: 0 auto;
  border: 1px solid #dfe8e5;
  border-radius: 24px;
  background: #fff;
  box-shadow: 0 10px 24px rgba(23, 33, 31, 0.12);
}

.shot figcaption {
  margin-top: 10px;
  color: var(--muted);
  font-size: 0.9rem;
  text-align: center;
}

.todo {
  margin: 16px 0 0;
  border: 1px solid #efd48e;
  background: var(--warn-bg);
  color: var(--warn);
  font-weight: 650;
}

.note-block {
  margin-top: 18px;
  background: var(--primary-soft);
  border-color: #bdded6;
}

.permission-grid,
.faq-grid {
  display: grid;
  gap: 12px;
}

.permission-grid div,
.faq-grid article {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfdfc;
  padding: 14px;
}

.permission-grid strong {
  display: block;
  margin-bottom: 4px;
  color: var(--primary);
}

.permission-grid span {
  display: block;
  color: var(--muted);
}

.faq-grid p {
  color: var(--muted);
}

.footer {
  padding: 28px 0 40px;
  color: var(--muted);
  font-size: 0.92rem;
}

@media (min-width: 760px) {
  .hero__inner {
    padding: 64px 0 48px;
  }

  .section {
    padding: 34px;
  }

  .guide-grid {
    grid-template-columns: minmax(260px, 0.85fr) minmax(0, 1.6fr);
    align-items: start;
  }

  .permission-grid {
    grid-template-columns: repeat(5, 1fr);
  }

  .faq-grid {
    grid-template-columns: repeat(2, 1fr);
  }

}

@media (min-width: 1080px) {
  .shot-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .shot-grid.four {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}