/* Hinata site · shared styles (no JS) */
:root {
  --bg: #FFFBF3;
  --bg-2: #FFF3DC;
  --card: #FFFFFF;
  --ink: #1F2430;
  --ink-2: #5B6270;
  --ink-3: #8B9099;
  --line: rgba(60, 70, 90, .14);
  --primary: #2E8BFF;
  --primary-ink: #1A6FDB;     /* links on light bg (≥ 4.5:1) */
  --primary-soft: #E6F0FF;
  --sun-1: #FFD54A;
  --sun-2: #FFA52E;
  --sun-3: #FF7A1A;
  --warn-soft: #FFF1D6;
  --warn-ink: #9A4A00;
  --shadow: 0 10px 30px rgba(40, 60, 100, .10), 0 2px 6px rgba(40, 60, 100, .05);
  --radius: 22px;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1B1A1F;
    --bg-2: #262229;
    --card: #26242B;
    --ink: #F2EEE6;
    --ink-2: #C0BAB0;
    --ink-3: #8F8A82;
    --line: rgba(255, 220, 170, .14);
    --primary: #5AA3FF;
    --primary-ink: #8FC0FF;
    --primary-soft: #23324A;
    --warn-soft: #3A2C18;
    --warn-ink: #FFC27A;
    --shadow: 0 10px 30px rgba(0, 0, 0, .40), 0 2px 6px rgba(0, 0, 0, .25);
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background:
    radial-gradient(800px 420px at 90% -8%, rgba(255, 213, 74, .30), transparent 60%),
    radial-gradient(600px 360px at -10% 20%, rgba(46, 139, 255, .10), transparent 60%),
    var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic UI", "Yu Gothic", "Noto Sans JP", "Noto Sans CJK JP", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-feature-settings: "palt";
  line-height: 1.8;
  min-height: 100vh;
}
a { color: var(--primary-ink); text-decoration: none; }
a:hover, a:focus-visible { text-decoration: underline; text-underline-offset: .2em; }
a:focus-visible, .btn:focus-visible { outline: 3px solid var(--sun-2); outline-offset: 3px; border-radius: 6px; }
.wrap { max-width: 1000px; margin: 0 auto; padding: 0 20px; }

/* header */
.top { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 16px 0; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--ink); font-weight: 800; font-size: 18px; min-height: 44px; }
.brand:hover { text-decoration: none; }
.brand img { width: 36px; height: 36px; border-radius: 10px; box-shadow: 0 3px 10px rgba(255, 122, 26, .30); }
.top nav { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 2px; }
.top nav a { display: inline-flex; align-items: center; min-height: 44px; padding: 0 12px; border-radius: 999px; color: var(--ink-2); font-size: 14px; }
.top nav a:hover, .top nav a[aria-current="page"] { background: var(--primary-soft); color: var(--ink); text-decoration: none; }

/* buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 48px; padding: 0 22px; border-radius: 999px; font-weight: 700; font-size: 16px;
  transition: transform .15s ease;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-primary { color: #fff; background: linear-gradient(135deg, #58A6FF, var(--primary) 60%, #1F6FE0); box-shadow: 0 8px 20px rgba(46, 139, 255, .30); }
.btn-sun { color: #3A2000; background: linear-gradient(135deg, var(--sun-1), var(--sun-2) 60%, var(--sun-3)); box-shadow: 0 8px 20px rgba(255, 122, 26, .30); }
.btn-ghost { color: var(--ink); background: var(--card); border: 1px solid var(--line); }
.btn[aria-disabled="true"] { opacity: .7; cursor: default; }
.btn[aria-disabled="true"]:hover { transform: none; }

/* product hero */
.hero { display: grid; grid-template-columns: 200px 1fr; gap: 36px; align-items: center; padding: 36px 0 48px; }
.hero-icon { width: 200px; height: 200px; border-radius: 22%; box-shadow: 0 26px 56px rgba(255, 122, 26, .30), 0 6px 16px rgba(184, 100, 20, .18); }
.hero h1 { margin: 0; font-size: clamp(36px, 6vw, 56px); line-height: 1.15; font-weight: 900; letter-spacing: .01em; }
.hero .kicker { margin: 0 0 6px; color: var(--ink-2); font-weight: 700; font-size: 15px; letter-spacing: .06em; }
.hero .slogan { margin: 10px 0 0; font-size: clamp(20px, 3vw, 28px); font-weight: 800;
  background: linear-gradient(90deg, var(--sun-3), var(--sun-2) 55%, #E8A100); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero .lead { margin: 12px 0 0; color: var(--ink-2); font-size: 16px; max-width: 34em; }
.hero-cta { margin-top: 24px; display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
.hero-cta .note { color: var(--ink-3); font-size: 13px; }

/* feature cards */
section { padding: 20px 0 36px; }
.sec-title { margin: 0 0 18px; font-size: 22px; font-weight: 800; }
.features { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 18px; }
.feature { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; box-shadow: var(--shadow); }
.feature .num { display: inline-flex; align-items: center; justify-content: center; width: 40px; height: 40px; border-radius: 12px; font-weight: 800; color: #3A2000;
  background: linear-gradient(135deg, var(--sun-1), var(--sun-2)); margin-bottom: 12px; }
.feature h3 { margin: 0 0 6px; font-size: 19px; font-weight: 800; line-height: 1.4; }
.feature p { margin: 0; color: var(--ink-2); font-size: 15px; }
.flow { display: inline-flex; flex-wrap: wrap; gap: 6px; align-items: center; }
.flow span { padding: 2px 10px; border-radius: 999px; background: var(--primary-soft); color: var(--ink); font-size: 13px; font-weight: 700; }
.flow i { color: var(--ink-3); font-style: normal; }

/* generic panel */
.panel { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px 28px; box-shadow: var(--shadow); }
.links { display: flex; flex-wrap: wrap; gap: 8px 18px; padding: 0; margin: 0; list-style: none; }
.links a { display: inline-flex; align-items: center; min-height: 44px; }

/* legal doc */
.doc-head { padding: 24px 0 8px; }
.doc-head .eyebrow { margin: 0; color: var(--ink-3); font-size: 13px; letter-spacing: .06em; }
.doc-head h1 { margin: 4px 0 0; font-size: clamp(26px, 4.5vw, 36px); line-height: 1.3; font-weight: 800; }
.doc-head .meta { margin: 8px 0 0; color: var(--ink-2); font-size: 14px; }

.doc { position: relative; }
.doc > input[type="radio"] { position: absolute; top: 0; left: 0; opacity: 0; width: 1px; height: 1px; margin: 0; pointer-events: none; }
.lang-tabs { display: flex; gap: 6px; margin: 18px 0 0; padding: 4px; border-radius: 999px; background: var(--bg-2); width: max-content; max-width: 100%; }
#lang-ja:focus-visible ~ .lang-tabs label[for="lang-ja"],
#lang-zh:focus-visible ~ .lang-tabs label[for="lang-zh"] { outline: 3px solid var(--sun-2); outline-offset: 2px; }
.lang-tabs label { display: inline-flex; align-items: center; min-height: 44px; padding: 0 18px; border-radius: 999px; font-weight: 700; font-size: 15px; color: var(--ink-2); cursor: pointer; user-select: none; }
.lang-tabs label:hover { color: var(--ink); }
#lang-ja:checked ~ .lang-tabs label[for="lang-ja"],
#lang-zh:checked ~ .lang-tabs label[for="lang-zh"] { background: var(--card); color: var(--ink); box-shadow: 0 2px 8px rgba(40, 60, 100, .12); }
.doc-lang { display: none; }
#lang-ja:checked ~ .doc-lang-ja, #lang-zh:checked ~ .doc-lang-zh { display: block; }

.prose { max-width: 72ch; margin: 8px 0 40px; font-size: 16px; line-height: 1.9; }
.prose > :first-child { margin-top: 0; }
/* 正文标题比 md 降一级：md 的 # → h2、## → h3、### → h4（页面 h1 是文档名） */
.prose h2 { font-size: clamp(24px, 4vw, 30px); line-height: 1.35; margin: 32px 0 12px; font-weight: 800; }
.prose h3 { font-size: 20px; line-height: 1.45; margin: 40px 0 12px; padding-top: 12px; border-top: 1px solid var(--line); font-weight: 800; }
.prose h4 { font-size: 17px; margin: 26px 0 8px; font-weight: 800; }
.prose p { margin: 0 0 14px; }
.prose ul, .prose ol { margin: 0 0 16px; padding-left: 1.6em; }
.prose li { margin: 4px 0; }
.prose li > p { margin: 0; }
.prose blockquote { margin: 0 0 16px; padding: 10px 16px; border-left: 4px solid var(--sun-2); background: var(--warn-soft); color: var(--warn-ink); border-radius: 8px; font-size: 14px; }
.prose blockquote p { margin: 0 0 6px; }
.prose blockquote.summary { border-left-color: var(--primary); background: var(--primary-soft); color: var(--ink); font-size: 15px; padding: 14px 18px; }
.prose blockquote.summary ul { margin: 6px 0 0; padding-left: 1.3em; }
.prose blockquote.summary li { margin: 6px 0; }
.prose hr { border: 0; border-top: 1px solid var(--line); margin: 28px 0; }
.prose strong { font-weight: 800; }
.prose code { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: .92em; background: var(--bg-2); padding: 1px 6px; border-radius: 6px; }
.prose .ph { background: var(--warn-soft); color: var(--warn-ink); border-radius: 4px; padding: 0 3px; }
.table-wrap { overflow-x: auto; margin: 0 0 18px; -webkit-overflow-scrolling: touch; border: 1px solid var(--line); border-radius: 14px; background: var(--card); }
.prose table { border-collapse: collapse; width: 100%; min-width: 520px; font-size: 14.5px; line-height: 1.7; }
.prose th, .prose td { text-align: left; vertical-align: top; padding: 10px 14px; border-bottom: 1px solid var(--line); }
.prose th { background: var(--bg-2); font-weight: 800; white-space: nowrap; }
.prose tr:last-child td { border-bottom: 0; }
.prose td:first-child { font-weight: 700; white-space: nowrap; }
.prose table.wide td:first-child { white-space: normal; }
.doc-foot { margin: 0 0 24px; padding: 14px 18px; border-radius: 14px; background: var(--primary-soft); font-size: 14px; color: var(--ink-2); max-width: 72ch; }

/* FAQ */
.faq details { background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 0 20px; margin: 0 0 12px; box-shadow: var(--shadow); }
.faq summary { cursor: pointer; list-style: none; display: flex; align-items: center; gap: 12px; min-height: 56px; padding: 10px 0; font-weight: 800; font-size: 16.5px; line-height: 1.5; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::before { content: "Q"; flex: none; display: inline-flex; align-items: center; justify-content: center; width: 30px; height: 30px; border-radius: 9px; font-size: 14px; color: #3A2000; background: linear-gradient(135deg, var(--sun-1), var(--sun-2)); }
.faq details[open] summary { border-bottom: 1px solid var(--line); }
.faq .a { padding: 12px 0 18px 42px; color: var(--ink-2); font-size: 15.5px; }
.faq .a p { margin: 0 0 10px; }
.faq .a p:last-child { margin: 0; }
.faq .a ol, .faq .a ul { margin: 0 0 10px; padding-left: 1.4em; }

footer { padding: 28px 0 40px; color: var(--ink-3); font-size: 13px; display: flex; flex-wrap: wrap; gap: 8px 20px; justify-content: space-between; border-top: 1px solid var(--line); margin-top: 20px; }
footer a { color: var(--ink-3); display: inline-flex; align-items: center; min-height: 32px; }
footer nav { display: flex; flex-wrap: wrap; gap: 4px 16px; }

@media (max-width: 720px) {
  .hero { grid-template-columns: 1fr; gap: 24px; padding-top: 16px; text-align: center; }
  .hero-icon { width: 150px; height: 150px; margin: 0 auto; }
  .hero .lead { margin-left: auto; margin-right: auto; }
  .hero-cta { justify-content: center; }
  .panel { padding: 20px; }
  .top nav a { padding: 0 9px; font-size: 13px; }
  .prose th, .prose td { padding: 8px 10px; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } .btn { transition: none; } }