:root {
  --paper: #f9f6ee;
  --paper-deep: #f1ece0;
  --card: #fffdf8;
  --ink: #2a2622;
  --ink-strong: #161616;
  --ink-soft: #5e574b;
  --ink-faint: #857d6d;
  --line: #e4ddcd;
  --blue: #0a84ff;
  --serif: "Hina Mincho", "Hiragino Mincho ProN", "Yu Mincho", serif;
  --sans: "Helvetica Neue", "Hiragino Sans", "Hiragino Kaku Gothic ProN", Arial, sans-serif;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 17px;
  line-height: 1.8;
  letter-spacing: 0.03em;
}

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

.wrap { max-width: 1040px; margin: 0 auto; padding: 0 20px; }
.narrow { max-width: 680px; }

/* header */
.top { display: flex; align-items: center; justify-content: space-between; padding: 16px 0; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.brand img { width: 32px; height: 32px; border-radius: 7px; }
.brand span { font-size: 19px; color: var(--ink-strong); }
.lang { font-family: var(--sans); font-size: 13px; color: var(--ink-soft); text-decoration: none; border: 1px solid var(--line); border-radius: 999px; padding: 4px 14px; }

/* buttons */
.cta {
  display: inline-block; background: var(--ink-strong); color: #fff; text-decoration: none;
  font-family: var(--sans); font-size: 16px; letter-spacing: 0.02em; padding: 15px 30px; border-radius: 999px;
}
.cta:hover { background: #000; }
.meta { font-family: var(--sans); font-size: 13px; color: var(--ink-faint); margin: 14px 0 0; letter-spacing: 0.02em; }

/* hero */
.hero { display: grid; gap: 32px; align-items: center; padding: 28px 0 64px; }
.hero h1 { font-size: clamp(32px, 7vw, 54px); line-height: 1.35; font-weight: 400; margin: 0 0 16px; color: var(--ink-strong); }
.hero .sub { font-size: clamp(17px, 2.6vw, 20px); color: var(--ink-soft); margin: 0 0 28px; }
.hero .photo { border-radius: 22px; overflow: hidden; aspect-ratio: 4 / 3; }
.hero .photo img { width: 100%; height: 100%; object-fit: cover; }
@media (min-width: 860px) {
  .hero { grid-template-columns: 1fr 1.05fr; gap: 56px; padding: 48px 0 88px; }
}

/* three points */
.points { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; padding: 0 0 72px; text-align: center; }
.points div { background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 20px 8px; }
.points b { display: block; font-weight: 400; font-size: clamp(19px, 3vw, 24px); color: var(--ink-strong); line-height: 1.4; }
.points span { display: block; font-size: clamp(12px, 1.8vw, 14px); color: var(--ink-soft); margin-top: 4px; line-height: 1.5; }

/* feature rows */
.row { display: grid; gap: 28px; align-items: center; padding: 56px 0; }
.row + .row { border-top: 1px solid var(--line); }
.row .text h2 { font-size: clamp(27px, 5vw, 38px); line-height: 1.45; font-weight: 400; margin: 0 0 14px; color: var(--ink-strong); }
.row .text p { margin: 0; font-size: 18px; color: var(--ink-soft); }
.row .shot { display: flex; justify-content: center; }
.row .shot img {
  width: min(78vw, 330px); height: auto; aspect-ratio: 860 / 1526; object-fit: cover; object-position: 50% 100%;
  border-radius: 28px; background: var(--paper);
}
@media (min-width: 860px) {
  .row { grid-template-columns: 1fr 1fr; gap: 64px; padding: 72px 0; }
  .row.flip .shot { order: -1; }
}

/* what's inside */
.inside { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin: 24px 0 16px; }
.inside div { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 14px 16px; }
.inside b { font-family: var(--sans); font-weight: 400; font-size: 30px; color: var(--ink-strong); line-height: 1.2; }
.inside small { font-size: 14px; color: var(--ink-strong); margin-left: 2px; }
.inside span { display: block; font-size: 14px; color: var(--ink-soft); line-height: 1.5; margin-top: 4px; }
.free { display: inline-block; font-family: var(--sans); font-size: 13px; color: var(--ink-soft); border: 1px solid var(--line); border-radius: 999px; padding: 3px 12px; }

/* story */
.story { padding: 72px 0; }
.story .photo { border-radius: 22px; overflow: hidden; aspect-ratio: 16 / 9; margin-bottom: 36px; }
.story .photo img { width: 100%; height: 100%; object-fit: cover; object-position: 50% 45%; }
.story h2 { font-size: clamp(25px, 4.4vw, 34px); font-weight: 400; line-height: 1.5; margin: 0 0 18px; color: var(--ink-strong); }
.story p { color: var(--ink-soft); margin: 0 0 14px; }
.story .sign { color: var(--ink-faint); font-size: 15px; }

/* sections */
.block { padding: 64px 0; border-top: 1px solid var(--line); }
.block h2 { font-size: clamp(25px, 4.4vw, 32px); font-weight: 400; margin: 0 0 24px; color: var(--ink-strong); text-align: center; }

.faq details { border-bottom: 1px solid var(--line); }
.faq summary { cursor: pointer; padding: 16px 28px 16px 0; font-size: 17px; color: var(--ink-strong); list-style: none; position: relative; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; right: 4px; top: 14px; font-family: var(--sans); color: var(--ink-faint); font-size: 20px; }
.faq details[open] summary::after { content: "−"; }
.faq details p { margin: 0 0 18px; color: var(--ink-soft); font-size: 16px; }

.reads { list-style: none; padding: 0; margin: 0 0 18px; }
.reads li { border-bottom: 1px solid var(--line); }
.reads a { display: block; padding: 14px 0; text-decoration: none; }
.reads a:hover { color: var(--blue); }
.more { text-align: center; font-family: var(--sans); font-size: 14px; }
.more a { color: var(--ink-soft); }

.final { text-align: center; padding: 80px 0; border-top: 1px solid var(--line); }
.final h2 { font-size: clamp(28px, 5vw, 40px); font-weight: 400; margin: 0 0 26px; color: var(--ink-strong); }

footer { padding: 32px 0 44px; border-top: 1px solid var(--line); font-family: var(--sans); font-size: 13px; color: var(--ink-faint); }
footer .links { display: flex; flex-wrap: wrap; gap: 8px 20px; margin-bottom: 10px; }
footer a { text-decoration: none; }
footer a:hover { text-decoration: underline; }