:root {
  --blue: #3f8fe5;
  --blue-deep: #2875c7;
  --blue-soft: #eaf4ff;
  --ink: #1f2d3d;
  --text: #34495e;
  --muted: #6f7f90;
  --line: #d8e4f0;
  --light: #f4f7fb;
  --light-2: #eef3f9;
  --shadow: 0 12px 32px rgba(43, 97, 153, .10);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: #fff;
  color: var(--text);
  font-family: Arial, "Microsoft YaHei", sans-serif;
  line-height: 1.75;
  overflow-x: hidden;
}
body.drawer-open { overflow: hidden; }
a { color: #2f83d8; }
img { max-width: 100%; }
button, a { -webkit-tap-highlight-color: transparent; }
.skip-link { position: fixed; left: 12px; top: -80px; z-index: 12000; padding: 10px 14px; background: #fff; border: 2px solid var(--blue); border-radius: 8px; }
.skip-link:focus { top: 12px; }
.site-header {
  position: sticky;
  top: 0;
  width: 100%;
  z-index: 9999;
  background: rgba(255,255,255,.94);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid #e5edf5;
  box-shadow: 0 6px 20px rgba(43,97,153,.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 { flex: 0 0 auto; display: inline-flex; align-items: center; }
.site-logo img { display: block; max-height: 44px; width: auto; }
.nav-core { display: flex; align-items: center; gap: 10px; margin-left: auto; }
.nav-core a { color: var(--text); text-decoration: none; padding: 8px 10px; border-radius: 8px; white-space: nowrap; }
.nav-core a:hover, .nav-core a.active { color: var(--blue-deep); background: var(--blue-soft); }
.header-actions { display: flex; align-items: center; gap: 10px; }
.main-btn { display: inline-flex; align-items: center; justify-content: center; min-height: 44px; padding: 0 22px; color: #fff; background: var(--blue); border: 1px solid var(--blue); border-radius: 8px; text-decoration: none; box-shadow: 0 10px 24px rgba(63,143,229,.22); position: relative; z-index: 2; pointer-events: auto; touch-action: manipulation; font-weight: 700; }
.main-btn:hover { background: #2f7fd3; transform: translateY(-1px); }
.main-btn:focus-visible, .secondary-btn:focus-visible, .text-link:focus-visible, .menu-toggle:focus-visible, .drawer-close:focus-visible { outline: 3px solid rgba(40,117,199,.32); outline-offset: 3px; }
.secondary-btn { display: inline-flex; align-items: center; justify-content: center; min-height: 44px; padding: 0 20px; border: 1px solid var(--line); border-radius: 8px; text-decoration: none; color: var(--blue-deep); background: #fff; font-weight: 700; }
.secondary-btn:hover { border-color: var(--blue); background: var(--blue-soft); }
.menu-toggle { width: 46px; height: 46px; border: 1px solid var(--line); border-radius: 9px; background: #fff; display: inline-flex; flex-direction: column; align-items: center; justify-content: center; gap: 5px; cursor: pointer; position: relative; z-index: 3; }
.menu-toggle span { width: 20px; height: 2px; background: var(--ink); border-radius: 3px; }
.drawer-overlay { position: fixed; inset: 0; z-index: 10000; background: rgba(18,34,52,.46); opacity: 0; transition: opacity .22s ease; }
.drawer-overlay.is-visible { opacity: 1; }
.site-drawer { position: fixed; right: 0; top: 0; bottom: 0; width: min(390px, 88vw); background: #fff; z-index: 10001; padding: 22px; transform: translateX(105%); transition: transform .25s ease; overflow-y: auto; box-shadow: -18px 0 44px rgba(20,59,95,.18); }
.site-drawer.is-open { transform: translateX(0); }
.drawer-head { display: flex; align-items: center; justify-content: space-between; padding-bottom: 18px; border-bottom: 1px solid #e5edf5; }
.drawer-logo img { max-height: 40px; width: auto; display: block; }
.drawer-close { width: 44px; height: 44px; border: 1px solid var(--line); background: #fff; border-radius: 9px; font-size: 28px; line-height: 1; cursor: pointer; }
.drawer-nav { display: grid; gap: 4px; padding: 18px 0; }
.drawer-nav a { display: block; padding: 11px 12px; border-radius: 8px; text-decoration: none; color: var(--text); }
.drawer-nav a:hover { background: var(--blue-soft); color: var(--blue-deep); }
.drawer-download { width: 100%; }
.container { width: min(1160px, calc(100% - 40px)); margin: 0 auto; }
.narrow { width: min(860px, calc(100% - 40px)); margin: 0 auto; }
.section { padding: 88px 0; }
.section-sm { padding: 58px 0; }
.section-light { background: var(--light); }
.section-blue-soft { background: var(--blue-soft); }
.section-head { max-width: 760px; margin-bottom: 38px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.eyebrow { display: inline-flex; margin-bottom: 12px; color: var(--blue-deep); font-size: 14px; font-weight: 700; letter-spacing: .05em; }
h1, h2, h3, .section-title { color: var(--ink); line-height: 1.28; }
h1 { font-size: clamp(38px, 5vw, 66px); margin: 0 0 22px; letter-spacing: -.03em; }
h2 { font-size: clamp(28px, 3.5vw, 42px); margin: 0 0 18px; }
h3 { font-size: 21px; margin: 0 0 10px; }
p { margin: 0 0 16px; }
.lead { font-size: clamp(18px, 2vw, 22px); color: var(--muted); }
.hero { position: relative; overflow: hidden; padding: 88px 0 74px; background: linear-gradient(180deg, #fff 0%, #f7fbff 100%); }
.hero::before, .hero::after { content: ""; position: absolute; border-radius: 999px; pointer-events: none; }
.hero::before { width: 420px; height: 420px; right: -150px; top: -200px; background: rgba(63,143,229,.08); }
.hero::after { width: 260px; height: 260px; left: -130px; bottom: -160px; background: rgba(63,143,229,.06); }
.hero-grid { position: relative; z-index: 1; display: grid; grid-template-columns: 1.04fr .96fr; align-items: center; gap: 68px; }
.hero-copy { max-width: 680px; }
.hero-copy .lead { max-width: 650px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 28px 0 24px; }
.hero-links { display: flex; flex-wrap: wrap; gap: 20px; margin-top: 20px; }
.hero-links a { text-decoration: none; font-weight: 700; }
.hero-points { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 10px 18px; margin: 26px 0 0; padding: 0; list-style: none; }
.hero-points li { padding-left: 24px; position: relative; }
.hero-points li::before { content: "✓"; position: absolute; left: 0; top: 0; color: var(--blue); font-weight: 800; }
.hero-visual { display: flex; justify-content: center; }
.hero-visual img { width: min(100%, 520px); max-height: 620px; height: auto; object-fit: contain; display: block; filter: drop-shadow(0 30px 42px rgba(43,97,153,.18)); }
.info-grid { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 18px; }
.info-card, .category-card, .review-card, .faq-card, .content-card { background: #fff; border: 1px solid var(--line); border-radius: 10px; box-shadow: 0 8px 24px rgba(43,97,153,.06); }
.info-card { padding: 26px; }
.info-card .number { display: inline-flex; align-items: center; justify-content: center; width: 38px; height: 38px; border-radius: 10px; background: var(--blue-soft); color: var(--blue-deep); font-weight: 800; margin-bottom: 16px; }
.category-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 30px; }
.category-card { padding: 28px; transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease; }
.category-card:hover { transform: translateY(-4px); border-color: var(--blue); box-shadow: var(--shadow); }
.category-card.wide { grid-column: 1 / -1; }
.category-card p { color: var(--muted); min-height: 56px; }
.text-link { color: #2f83d8; text-decoration: none; font-weight: 700; }
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 72px; align-items: center; }
.split.reverse .feature-image { order: 2; }
.split.reverse .feature-copy { order: 1; }
.feature-image { min-width: 0; }
.content-img, .feature-image img { width: 100%; max-height: 480px; height: auto; object-fit: contain; display: block; }
.feature-copy p { color: #43586d; }
.feature-copy ul, .article-body ul, .article-body ol { padding-left: 22px; }
.feature-copy li, .article-body li { margin-bottom: 9px; }
.dual-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 28px; }
.content-card { padding: 32px; }
.content-card img { max-height: 250px; margin: 0 auto 24px; object-fit: contain; display: block; }
.review-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 20px; }
.review-card { padding: 26px; }
.review-card p { color: #52677c; }
.review-card strong { color: var(--ink); }
.faq-list { display: grid; gap: 14px; }
details.faq-card { padding: 0; overflow: hidden; }
details.faq-card summary { cursor: pointer; list-style: none; padding: 20px 24px; color: var(--ink); font-weight: 700; display: flex; justify-content: space-between; gap: 18px; }
details.faq-card summary::-webkit-details-marker { display: none; }
details.faq-card summary::after { content: "+"; color: var(--blue); font-size: 24px; line-height: 1; }
details.faq-card[open] summary::after { content: "−"; }
details.faq-card .answer { padding: 0 24px 22px; color: #52677c; }
.risk-box { padding: 28px 30px; border: 1px solid #bdd7f2; border-left: 5px solid var(--blue); background: #f6fbff; border-radius: 10px; }
.page-hero { padding: 72px 0 58px; background: linear-gradient(180deg, #f7fbff, #fff); border-bottom: 1px solid #edf3f8; }
.page-hero .container { max-width: 900px; text-align: center; }
.page-hero h1 { font-size: clamp(34px, 4.8vw, 56px); }
.breadcrumbs { font-size: 14px; color: var(--muted); margin-bottom: 18px; }
.breadcrumbs a { text-decoration: none; }
.article-layout { display: grid; grid-template-columns: minmax(0, 1fr) 280px; gap: 42px; align-items: start; }
.article-body { min-width: 0; }
.article-body > section { margin-bottom: 48px; }
.article-body h2 { font-size: 30px; margin-top: 0; }
.article-body h3 { margin-top: 28px; }
.article-body p { color: #43586d; }
.article-body .content-card { margin: 28px 0; }
.toc { position: sticky; top: 96px; padding: 24px; border: 1px solid var(--line); border-radius: 10px; background: #fff; }
.toc h2 { font-size: 18px; }
.toc a { display: block; padding: 7px 0; text-decoration: none; color: var(--muted); }
.toc a:hover { color: var(--blue-deep); }
.steps { counter-reset: steps; display: grid; gap: 18px; }
.step { position: relative; padding: 24px 24px 24px 76px; border: 1px solid var(--line); border-radius: 10px; background: #fff; }
.step::before { counter-increment: steps; content: counter(steps); position: absolute; left: 22px; top: 22px; width: 38px; height: 38px; display: grid; place-items: center; border-radius: 10px; background: var(--blue-soft); color: var(--blue-deep); font-weight: 800; }
.notice-list { display: grid; gap: 16px; }
.notice-item { padding: 24px; border: 1px solid var(--line); background: #fff; border-radius: 10px; }
.notice-meta { color: var(--blue-deep); font-size: 14px; font-weight: 700; margin-bottom: 7px; }
.tag-row { display: flex; flex-wrap: wrap; gap: 8px; margin: 16px 0; }
.tag { display: inline-flex; padding: 5px 10px; border-radius: 999px; background: var(--blue-soft); color: var(--blue-deep); font-size: 13px; font-weight: 700; }
.cta-panel { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 34px; border-radius: 14px; background: var(--blue-deep); color: #fff; }
.cta-panel h2, .cta-panel p { color: #fff; }
.cta-panel .main-btn { background: #fff; color: var(--blue-deep); border-color: #fff; box-shadow: none; flex: 0 0 auto; }
.site-footer { background: #438ddf; color: #fff; }
.footer-inner { width: min(1160px, calc(100% - 40px)); margin: 0 auto; padding: 64px 0 38px; display: grid; grid-template-columns: 1.2fr 2fr; gap: 70px; }
.footer-brand img { max-height: 46px; width: auto; filter: brightness(0) invert(1); margin-bottom: 18px; }
.footer-brand p { color: rgba(255,255,255,.88); }
.footer-links { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 28px; }
.footer-links h2 { color: #fff; font-size: 17px; margin-bottom: 14px; }
.footer-links a { display: block; color: rgba(255,255,255,.9); text-decoration: none; padding: 4px 0; }
.footer-links a:hover { color: #fff; text-decoration: underline; }
.footer-risk { width: min(1160px, calc(100% - 40px)); margin: 0 auto; padding: 22px 0; border-top: 1px solid rgba(255,255,255,.24); color: rgba(255,255,255,.88); }
.footer-bottom { padding: 20px; text-align: center; border-top: 1px solid rgba(255,255,255,.18); color: rgba(255,255,255,.8); font-size: 14px; }
@media (max-width: 1080px) {
  .nav-core { display: none; }
  .header-inner { min-height: 66px; }
  .info-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
  .review-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
  .article-layout { grid-template-columns: 1fr; }
  .toc { position: static; order: -1; }
}
@media (max-width: 820px) {
  .section { padding: 68px 0; }
  .hero { padding: 62px 0; }
  .hero-grid, .split { grid-template-columns: 1fr; gap: 38px; }
  .split.reverse .feature-image, .split.reverse .feature-copy { order: initial; }
  .hero-copy { text-align: center; margin: 0 auto; }
  .hero-actions, .hero-links { justify-content: center; }
  .hero-points { text-align: left; max-width: 560px; margin-left: auto; margin-right: auto; }
  .hero-visual img { max-height: 510px; }
  .category-grid { grid-template-columns: repeat(2, minmax(0,1fr)); gap: 24px; }
  .dual-grid { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; gap: 34px; }
  .cta-panel { align-items: flex-start; flex-direction: column; }
}
@media (max-width: 600px) {
  .container, .narrow, .footer-inner, .footer-risk { width: min(100% - 32px, 1160px); }
  .header-inner { min-height: 62px; padding: 0 12px; gap: 8px; }
  .site-logo img { max-height: 35px; max-width: 130px; }
  .header-actions { gap: 7px; }
  .header-download { min-height: 44px; padding: 0 13px; font-size: 14px; }
  .menu-toggle { width: 44px; height: 44px; }
  h1 { font-size: 38px; }
  .hero-points, .info-grid, .category-grid, .review-grid, .footer-links { grid-template-columns: 1fr; }
  .category-card.wide { grid-column: auto; }
  .hero-actions .main-btn, .hero-actions .secondary-btn { width: 100%; }
  .hero-links { gap: 10px 18px; }
  .page-hero { padding: 52px 0 44px; }
  .article-body h2 { font-size: 26px; }
  .content-card, .info-card, .category-card, .review-card { padding: 22px; }
  .step { padding: 22px 20px 22px 68px; }
  .cta-panel { padding: 26px; }
}