/* 8keep.net — 方向 A「Studio White」（与 App 一致）：象牙白底、黑色主色、少量墨绿。零 JS。 */
:root { --bg: #FAF8F5; --card: #fff; --line: #EEE9E1; --ink: #141414; --muted: #6f6f6f; --green: #0A7D6C; --green-bg: #E4F3EF; }
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 17px/1.6 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, "Noto Sans", "Noto Sans Arabic", "Noto Sans JP", "Noto Sans KR", "PingFang TC", "PingFang SC", sans-serif; }
a { color: var(--ink); }
.top { max-width: 1080px; margin: 0 auto; padding: 18px 24px; display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.brand { font-weight: 800; letter-spacing: .04em; text-decoration: none; font-size: 20px; }
.top nav { display: flex; gap: 18px; flex-wrap: wrap; font-size: 15px; }
.top nav a { text-decoration: none; color: var(--muted); }
.top nav a[aria-current] { color: var(--ink); font-weight: 600; }
main { max-width: 1080px; margin: 0 auto; padding: 8px 24px 48px; }
.hero { display: grid; grid-template-columns: 1.1fr 1fr; gap: 40px; align-items: center; padding: 32px 0 40px; }
.eyebrow { color: var(--green); font-weight: 700; font-size: 13px; letter-spacing: .14em; text-transform: uppercase; margin: 0 0 10px; }
h1 { font-size: clamp(34px, 5.2vw, 56px); line-height: 1.04; letter-spacing: -.02em; margin: 0 0 18px; font-weight: 800; }
.lead { font-size: 19px; color: #3b3b3b; max-width: 34em; }
.badge { display: inline-block; background: var(--ink); color: #fff; border-radius: 14px; padding: 12px 18px; font-weight: 600; font-size: 15px; margin-top: 8px; }
.sheet { background: var(--card); border: 1px solid var(--line); border-radius: 22px; padding: 14px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.sheet img { width: 100%; height: auto; aspect-ratio: 3 / 4; object-fit: cover; object-position: 50% 28%; border-radius: 6px; }
.points { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.pt { background: var(--card); border: 1px solid var(--line); border-radius: 18px; padding: 18px; }
.pt h3 { font-size: 17px; margin: 0 0 6px; }
.pt p { margin: 0; color: #444; font-size: 15px; }
.docs h2 { font-size: 28px; margin: 48px 0 16px; letter-spacing: -.01em; }
.docs .grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 12px; }
.grp { background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 14px 16px; }
.grp h3 { margin: 0 0 6px; font-size: 16px; display: flex; align-items: center; gap: 8px; }
.grp ul { margin: 0; padding-inline-start: 18px; color: #444; font-size: 14.5px; }
.cc { background: var(--ink); color: #fff; font-size: 11px; font-weight: 800; border-radius: 5px; padding: 1px 6px; letter-spacing: .04em; }
.small { color: var(--muted); font-size: 14px; }
.price { margin-top: 28px; background: var(--green-bg); color: #0b4f45; border-radius: 16px; padding: 14px 18px; font-size: 15px; }
.doc { max-width: 760px; }
.doc h1 { font-size: clamp(30px, 4vw, 42px); }
.doc h2 { font-size: 20px; margin: 28px 0 6px; }
.doc p { color: #2e2e2e; }
details { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 12px 16px; margin: 10px 0; }
summary { font-weight: 600; cursor: pointer; }
.btn { display: inline-block; background: var(--ink); color: #fff; text-decoration: none; border-radius: 14px; padding: 12px 18px; font-weight: 600; margin-top: 12px; }
footer { max-width: 1080px; margin: 0 auto; padding: 24px; color: var(--muted); font-size: 13.5px; border-top: 1px solid var(--line); }
footer .langs a { color: var(--muted); }
footer .langs a[aria-current] { color: var(--ink); font-weight: 600; }
.note { background: #fff; border: 1px solid var(--line); border-radius: 12px; padding: 10px 14px; color: #444; }
@media (max-width: 820px) {
  .hero { grid-template-columns: 1fr; gap: 24px; padding-top: 12px; }
  .points { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 520px) { .points { grid-template-columns: 1fr; } body { font-size: 16px; } }