:root {
  --bg: #ffffff;
  --soft: #f4f7fb;
  --soft-2: #eef3f9;
  --blue: #3f8fe5;
  --blue-dark: #2875c7;
  --blue-link: #2f83d8;
  --title: #1f2d3d;
  --text: #34495e;
  --muted: #6f7f90;
  --border: #d8e4f0;
  --line: #e5edf5;
  --shadow: 0 12px 32px rgba(43, 97, 153, 0.10);
  --radius: 14px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Arial, "Microsoft YaHei", sans-serif;
  line-height: 1.75;
  overflow-x: hidden;
}
body.drawer-open { overflow: hidden; }
a { color: var(--blue-link); }
a:focus-visible, button:focus-visible { outline: 3px solid rgba(63,143,229,.35); outline-offset: 3px; }
img { max-width: 100%; }
button, a { -webkit-tap-highlight-color: transparent; }
.skip-link { position: fixed; top: -60px; left: 16px; z-index: 20000; background: #fff; padding: 10px 14px; border-radius: 8px; }
.skip-link:focus { top: 12px; }
.container { width: min(1160px, calc(100% - 40px)); margin: 0 auto; }
.narrow { width: min(900px, calc(100% - 40px)); margin: 0 auto; }
.site-header {
  position: sticky;
  top: 0;
  width: 100%;
  z-index: 9999;
  background: rgba(255,255,255,0.94);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
  box-shadow: 0 6px 20px rgba(43,97,153,0.08);
}
.header-inner {
  max-width: 1240px;
  min-height: 70px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}
.site-logo { display: inline-flex; align-items: center; flex: 0 0 auto; }
.site-logo img { display: block; max-height: 44px; width: auto; }
.nav-core { display: flex; align-items: center; justify-content: center; gap: 8px; }
.nav-core a { color: var(--text); text-decoration: none; padding: 8px 10px; border-radius: 8px; white-space: nowrap; font-size: 15px; }
.nav-core a:hover, .nav-core a.active { color: var(--blue-dark); background: #eaf4ff; }
.header-actions { display: flex; align-items: center; gap: 10px; flex: 0 0 auto; }
.main-btn, .secondary-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 22px;
  border-radius: 10px;
  text-decoration: none;
  position: relative;
  z-index: 2;
  pointer-events: auto;
  touch-action: manipulation;
  transition: transform .18s ease, background .18s ease, border-color .18s ease;
}
.main-btn { color: #fff; background: var(--blue); box-shadow: 0 10px 24px rgba(63,143,229,0.22); }
.main-btn:hover { background: #2f7fd3; transform: translateY(-1px); }
.secondary-btn { color: var(--blue-dark); background: #fff; border: 1px solid var(--border); }
.secondary-btn:hover { border-color: var(--blue); transform: translateY(-1px); }
.menu-toggle, .drawer-close { border: 0; background: transparent; cursor: pointer; touch-action: manipulation; }
.menu-toggle { width: 44px; height: 44px; display: inline-flex; flex-direction: column; align-items: center; justify-content: center; gap: 5px; border-radius: 10px; }
.menu-toggle:hover { background: var(--soft); }
.menu-toggle span { width: 22px; height: 2px; background: var(--title); border-radius: 2px; }
.drawer-overlay { position: fixed; inset: 0; z-index: 10000; background: rgba(21,42,66,.45); opacity: 0; transition: opacity .22s ease; }
.drawer-overlay.show { opacity: 1; }
.site-drawer { position: fixed; top: 0; right: 0; z-index: 10001; width: min(380px, 88vw); height: 100dvh; background: #fff; padding: 20px; transform: translateX(105%); transition: transform .24s ease; box-shadow: -20px 0 50px rgba(31,45,61,.18); overflow-y: auto; }
.site-drawer.open { transform: translateX(0); }
.drawer-head { display: flex; align-items: center; justify-content: space-between; border-bottom: 1px solid var(--line); padding-bottom: 14px; }
.drawer-close { width: 44px; height: 44px; font-size: 32px; color: var(--text); }
.drawer-nav { display: grid; gap: 6px; padding: 18px 0; }
.drawer-nav a { color: var(--text); text-decoration: none; padding: 11px 12px; border-radius: 9px; }
.drawer-nav a:hover, .drawer-nav a.active { color: var(--blue-dark); background: #eaf4ff; }
.drawer-download { width: 100%; }
.hero { position: relative; overflow: hidden; padding: 82px 0 72px; }
.hero::before, .hero::after { content: ""; position: absolute; border-radius: 999px; background: #eaf4ff; z-index: 0; }
.hero::before { width: 420px; height: 420px; right: -170px; top: -150px; }
.hero::after { width: 180px; height: 180px; left: -90px; bottom: -80px; background: var(--soft); }
.hero-grid { position: relative; z-index: 1; display: grid; grid-template-columns: 1.08fr .92fr; align-items: center; gap: 64px; }
.eyebrow { display: inline-block; margin-bottom: 14px; color: var(--blue-dark); background: #eaf4ff; border: 1px solid #cfe6ff; padding: 6px 12px; border-radius: 999px; font-size: 14px; font-weight: 700; }
h1, h2, h3, .section-title { color: var(--title); line-height: 1.28; }
h1 { margin: 0 0 18px; font-size: clamp(38px, 5vw, 64px); letter-spacing: -1.5px; }
.hero-subtitle { margin: 0 0 16px; font-size: clamp(20px, 2.2vw, 28px); color: var(--blue-dark); font-weight: 700; line-height: 1.45; }
.hero-copy { font-size: 17px; color: var(--muted); max-width: 720px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 28px 0 22px; }
.hero-links { display: flex; flex-wrap: wrap; gap: 18px; font-size: 14px; }
.hero-links a { text-decoration: none; }
.hero-points { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 12px; margin: 26px 0 0; padding: 0; list-style: none; }
.hero-points li { position: relative; padding-left: 23px; color: var(--text); }
.hero-points li::before { content: ""; position: absolute; left: 0; top: .68em; width: 10px; height: 10px; border-radius: 50%; background: var(--blue); box-shadow: 0 0 0 5px #eaf4ff; }
.hero-visual { display: flex; align-items: center; justify-content: center; }
.hero-visual img { width: min(460px, 100%); height: auto; object-fit: contain; display: block; filter: drop-shadow(0 28px 40px rgba(43,97,153,.16)); }
.section { padding: 78px 0; }
.section-light { background: var(--soft); }
.section-soft { background: var(--soft-2); }
.section-head { max-width: 760px; margin: 0 auto 38px; text-align: center; }
.section-head.left { margin-left: 0; text-align: left; }
.section-title { margin: 0 0 12px; font-size: clamp(28px, 3.6vw, 42px); }
.section-intro { margin: 0; color: var(--muted); font-size: 16px; }
.info-grid { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 20px; }
.category-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 30px; }
.category-card:last-child { grid-column: 1 / -1; }
.category-card, .info-card, .review-card, .faq-card, .content-card, .notice-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: 0 8px 24px rgba(43,97,153,0.06);
}
.info-card, .category-card, .review-card, .faq-card, .content-card, .notice-card { padding: 26px; }
.info-card h3, .category-card h3, .content-card h3, .notice-card h3 { margin: 0 0 9px; font-size: 20px; }
.info-card p, .category-card p, .review-card p, .faq-card p, .content-card p { margin: 0; color: var(--muted); }
.category-card { min-height: 190px; display: flex; flex-direction: column; transition: transform .18s ease, border-color .18s ease; }
.category-card:hover { border-color: var(--blue); transform: translateY(-4px); }
.category-card a { margin-top: auto; padding-top: 18px; text-decoration: none; font-weight: 700; }
.split { display: grid; grid-template-columns: minmax(0,.9fr) minmax(0,1.1fr); gap: 64px; align-items: center; }
.split.reverse { grid-template-columns: minmax(0,1.1fr) minmax(0,.9fr); }
.split.reverse .feature-image { order: 2; }
.feature-image { display: flex; justify-content: center; }
.feature-image img, .content-img { max-width: 100%; height: auto; object-fit: contain; display: block; }
.feature-image img { width: min(480px, 100%); }
.prose h2 { font-size: clamp(27px,3vw,40px); margin: 0 0 16px; }
.prose h3 { margin: 26px 0 8px; }
.prose p { color: var(--muted); margin: 0 0 16px; }
.prose ul, .prose ol { padding-left: 22px; color: var(--muted); }
.prose .actions { margin-top: 24px; }
.dual-grid, .review-grid, .faq-grid, .notice-grid, .article-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 24px; }
.review-card strong { display: block; color: var(--title); margin-bottom: 8px; }
.faq-card h3 { margin-top: 0; }
.faq-card p { color: var(--muted); }
.risk-box { background: #eaf4ff; border: 1px solid #cfe6ff; border-left: 5px solid var(--blue); border-radius: 12px; padding: 24px; }
.risk-box h2, .risk-box h3 { margin-top: 0; }
.risk-box p:last-child { margin-bottom: 0; }
.page-hero { padding: 68px 0 48px; background: linear-gradient(180deg, #f8fbff 0%, #fff 100%); border-bottom: 1px solid var(--line); }
.page-hero h1 { font-size: clamp(34px,4.6vw,54px); }
.page-hero p { max-width: 760px; color: var(--muted); font-size: 17px; }
.breadcrumb { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; margin-bottom: 14px; font-size: 14px; color: var(--muted); }
.breadcrumb a { text-decoration: none; }
.article { padding: 58px 0 78px; }
.article h2 { margin-top: 42px; font-size: 28px; }
.article h3 { margin-top: 28px; font-size: 21px; }
.article p, .article li { color: var(--muted); }
.article ul, .article ol { padding-left: 24px; }
.article table { width: 100%; border-collapse: collapse; margin: 24px 0; }
.article th, .article td { border: 1px solid var(--border); padding: 12px; text-align: left; vertical-align: top; }
.article th { background: var(--soft); color: var(--title); }
.faq-list details { border: 1px solid var(--border); background: #fff; border-radius: 12px; margin-bottom: 14px; padding: 0 20px; }
.faq-list summary { cursor: pointer; font-weight: 700; color: var(--title); padding: 18px 34px 18px 0; position: relative; list-style: none; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after { content: "+"; position: absolute; right: 0; top: 13px; color: var(--blue); font-size: 26px; }
.faq-list details[open] summary::after { content: "−"; }
.faq-list details p { margin: 0 0 18px; }
.notice-meta { color: var(--blue-dark); font-size: 14px; font-weight: 700; }
.notice-card h3 { margin-top: 6px; }
.notice-card a { display: inline-block; margin-top: 15px; text-decoration: none; font-weight: 700; }
.tag-list { display: flex; flex-wrap: wrap; gap: 10px; margin: 20px 0 0; }
.tag { padding: 6px 11px; background: #eaf4ff; color: var(--blue-dark); border-radius: 999px; font-size: 13px; }
.cta-band { background: var(--blue); color: #fff; padding: 42px; border-radius: 18px; display: flex; align-items: center; justify-content: space-between; gap: 28px; }
.cta-band h2 { color: #fff; margin: 0 0 8px; }
.cta-band p { margin: 0; color: rgba(255,255,255,.88); }
.cta-band .secondary-btn { flex: 0 0 auto; }
.site-footer { background: #438ddf; color: #fff; padding: 58px 0 24px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr repeat(3,1fr); gap: 36px; }
.footer-grid h2 { color: #fff; font-size: 17px; margin: 0 0 14px; }
.footer-grid a { display: block; color: rgba(255,255,255,.9); text-decoration: none; margin: 8px 0; }
.footer-grid a:hover { color: #fff; text-decoration: underline; }
.footer-brand p { color: rgba(255,255,255,.88); max-width: 360px; }
.footer-logo img { filter: brightness(0) invert(1); }
.footer-note { border-top: 1px solid rgba(255,255,255,.25); margin-top: 38px; padding-top: 22px; font-size: 13px; color: rgba(255,255,255,.82); }
.footer-note p { margin: 6px 0; }
@media (max-width: 1040px) {
  .nav-core { display: none; }
  .info-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
  .hero-grid, .split, .split.reverse { gap: 38px; }
}
@media (max-width: 800px) {
  .header-inner { min-height: 64px; padding: 0 14px; gap: 10px; }
  .site-logo img { max-height: 36px; max-width: 132px; }
  .header-download { min-height: 44px; padding: 0 14px; font-size: 14px; }
  .hero { padding: 52px 0 48px; }
  .hero-grid, .split, .split.reverse { grid-template-columns: 1fr; }
  .split.reverse .feature-image { order: 0; }
  .hero-visual { margin-top: 10px; }
  .hero-visual img { width: min(360px, 86vw); }
  .category-grid { grid-template-columns: repeat(2, minmax(0,1fr)); gap: 22px; }
  .category-card:last-child { grid-column: 1 / -1; }
  .dual-grid, .review-grid, .faq-grid, .notice-grid, .article-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: repeat(2,1fr); }
  .footer-brand { grid-column: 1 / -1; }
  .cta-band { align-items: flex-start; flex-direction: column; }
}
@media (max-width: 560px) {
  .container, .narrow { width: min(100% - 32px, 1160px); }
  .header-actions { gap: 4px; }
  .site-logo img { max-width: 112px; }
  .header-download { padding: 0 11px; }
  .menu-toggle { width: 44px; height: 44px; }
  h1 { font-size: 38px; }
  .hero-subtitle { font-size: 21px; }
  .hero-actions { display: grid; grid-template-columns: 1fr; }
  .hero-actions a { width: 100%; }
  .hero-points { grid-template-columns: 1fr; }
  .section { padding: 58px 0; }
  .info-grid, .category-grid { grid-template-columns: 1fr; gap: 16px; }
  .category-card:last-child { grid-column: auto; }
  .category-card { min-height: 0; }
  .info-card, .category-card, .review-card, .faq-card, .content-card, .notice-card { padding: 22px; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-brand { grid-column: auto; }
  .page-hero { padding: 48px 0 34px; }
  .article { padding: 38px 0 58px; }
  .cta-band { padding: 28px 22px; }
}