:root {
  --blue: #3f8fe5;
  --blue-dark: #2875c7;
  --blue-soft: #eaf4ff;
  --bg: #ffffff;
  --bg-light: #f4f7fb;
  --bg-alt: #eef3f9;
  --title: #1f2d3d;
  --text: #34495e;
  --muted: #6f7f90;
  --border: #d8e4f0;
  --line: #e5edf5;
  --shadow: 0 12px 32px rgba(43,97,153,.10);
}
* { 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; }
a { color: var(--blue-dark); }
img { max-width: 100%; height: auto; }
button, a { -webkit-tap-highlight-color: transparent; }
.skip-link { position: fixed; left: 16px; top: -80px; z-index: 12000; padding: 10px 14px; background: #fff; border: 1px 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 var(--line); 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 { display: inline-flex; align-items: center; flex: 0 0 auto; }
.site-logo img, .drawer-logo img { display: block; max-height: 44px; width: auto; }
.nav-core { display: flex; align-items: center; justify-content: center; gap: 8px; flex: 1; white-space: nowrap; }
.nav-core a { color: var(--text); text-decoration: none; padding: 8px 10px; border-radius: 8px; font-size: 15px; }
.nav-core a:hover, .nav-core a.active { color: var(--blue-dark); background: var(--blue-soft); }
.header-actions { display: flex; align-items: center; gap: 10px; flex: 0 0 auto; }
.main-btn { display: inline-flex; align-items: center; justify-content: center; min-height: 44px; padding: 0 22px; color: #fff; background: 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; border: 1px solid transparent; font-weight: 700; }
.main-btn:hover { background: #2f7fd3; transform: translateY(-1px); }
.main-btn:focus-visible, .text-button:focus-visible, .menu-button:focus-visible, .drawer-close:focus-visible, a:focus-visible { outline: 3px solid rgba(63,143,229,.35); outline-offset: 3px; }
.text-button { display: inline-flex; align-items: center; min-height: 42px; padding: 0 18px; border-radius: 8px; color: var(--blue-dark); background: var(--blue-soft); text-decoration: none; font-weight: 700; border: 1px solid #cfe5fb; }
.menu-button { width: 46px; height: 46px; border: 1px solid var(--border); 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-button span { width: 20px; height: 2px; background: var(--title); border-radius: 2px; }
.drawer-overlay { position: fixed; inset: 0; z-index: 10000; background: rgba(18,35,52,.42); opacity: 0; transition: opacity .25s ease; }
.drawer-menu { position: fixed; top: 0; right: 0; z-index: 10001; width: min(390px, 90vw); height: 100dvh; background: #fff; box-shadow: -18px 0 44px rgba(18,45,72,.18); padding: 20px; transform: translateX(105%); transition: transform .26s ease; overflow-y: auto; }
.drawer-open { overflow: hidden; }
.drawer-open .drawer-overlay { opacity: 1; }
.drawer-open .drawer-menu { transform: translateX(0); }
.drawer-head { display: flex; align-items: center; justify-content: space-between; padding-bottom: 16px; border-bottom: 1px solid var(--line); }
.drawer-close { width: 44px; height: 44px; border: 1px solid var(--border); border-radius: 8px; background: #fff; color: var(--title); font-size: 30px; line-height: 1; cursor: pointer; }
.drawer-links { display: grid; gap: 4px; padding: 16px 0; }
.drawer-links a { color: var(--text); text-decoration: none; padding: 12px 10px; border-radius: 8px; border-bottom: 1px solid #f0f4f8; }
.drawer-links a:hover { background: var(--blue-soft); color: var(--blue-dark); }
.drawer-download { width: 100%; }
main { display: block; }
.container { width: min(1160px, calc(100% - 40px)); margin: 0 auto; }
.section { padding: 78px 0; }
.section-light { background: var(--bg-light); }
.section-alt { background: var(--bg-alt); }
.section-head { max-width: 760px; margin: 0 auto 36px; text-align: center; }
.eyebrow { display: inline-block; margin-bottom: 10px; color: var(--blue-dark); font-size: 14px; font-weight: 700; letter-spacing: .08em; }
h1, h2, h3, .section-title { color: var(--title); line-height: 1.28; }
h1 { font-size: clamp(31px, 5vw, 54px); margin: 0 0 18px; letter-spacing: -.02em; }
h2 { font-size: clamp(27px, 4vw, 40px); margin: 0 0 16px; }
h3 { font-size: 20px; margin: 0 0 10px; }
p { margin: 0 0 16px; }
.lead { font-size: 19px; color: var(--muted); }
.hero { padding: 82px 0 70px; background: radial-gradient(circle at 82% 20%, #e8f4ff 0, rgba(232,244,255,.65) 20%, transparent 48%), linear-gradient(180deg,#fff 0,#f8fbff 100%); }
.hero-grid { display: grid; grid-template-columns: 1.08fr .92fr; align-items: center; gap: 58px; }
.hero-copy { max-width: 650px; }
.hero-copy .subtitle { font-size: clamp(21px, 2.8vw, 29px); color: var(--blue-dark); font-weight: 700; margin-bottom: 18px; }
.hero-copy .description { color: var(--muted); font-size: 17px; }
.hero-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 14px; margin: 28px 0 24px; }
.hero-links { display: flex; flex-wrap: wrap; gap: 16px; }
.hero-links a { text-decoration: none; border-bottom: 1px solid #b9d7f4; }
.hero-visual { display: flex; justify-content: center; }
.hero-visual img { width: min(100%, 510px); max-height: 590px; object-fit: contain; display: block; filter: drop-shadow(0 24px 30px rgba(43,97,153,.14)); }
.hero-points { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 12px; margin-top: 24px; }
.hero-points span { padding: 10px 12px; background: rgba(255,255,255,.82); border: 1px solid var(--border); border-radius: 8px; font-size: 14px; }
.info-grid { display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); gap: 20px; }
.info-card, .category-card, .review-card, .faq-card, .content-card, .notice-card { background: #fff; border: 1px solid var(--border); border-radius: 8px; box-shadow: 0 8px 24px rgba(43,97,153,.06); }
.info-card { padding: 25px; }
.info-card p, .category-card p, .review-card p, .faq-card p, .notice-card p { color: var(--muted); }
.category-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 30px; }
.category-card { padding: 28px; min-height: 190px; display: flex; flex-direction: column; 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.full { grid-column: 1 / -1; min-height: 150px; }
.category-card a { margin-top: auto; text-decoration: none; font-weight: 700; }
.split { display: grid; grid-template-columns: 1fr 1fr; align-items: center; gap: 62px; }
.split.reverse .media { order: 2; }
.media img { width: 100%; max-height: 460px; object-fit: contain; display: block; }
.content-copy ul, .article-body ul { padding-left: 22px; }
.content-copy li, .article-body li { margin-bottom: 8px; }
.button-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 24px; }
.two-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 28px; }
.three-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 24px; }
.content-card { padding: 32px; }
.review-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 22px; }
.review-card { padding: 25px; }
.review-card strong { display: block; color: var(--blue-dark); margin-top: 14px; }
.faq-list { display: grid; gap: 14px; }
details.faq-card { padding: 0; overflow: hidden; }
details.faq-card summary { list-style: none; cursor: pointer; padding: 20px 24px; font-weight: 700; color: var(--title); position: relative; padding-right: 52px; }
details.faq-card summary::-webkit-details-marker { display: none; }
details.faq-card summary::after { content: '+'; position: absolute; right: 22px; top: 15px; color: var(--blue); font-size: 26px; }
details[open].faq-card summary::after { content: '−'; }
details.faq-card .answer { padding: 0 24px 22px; color: var(--muted); }
.risk-box { padding: 26px; border: 1px solid #cfe0f1; border-left: 4px solid var(--blue); background: #f7fbff; border-radius: 8px; }
.page-hero { padding: 72px 0 54px; background: linear-gradient(180deg,#f6faff 0,#fff 100%); border-bottom: 1px solid var(--line); }
.page-hero .container { max-width: 900px; }
.page-hero h1 { font-size: clamp(34px,5vw,54px); }
.breadcrumb { font-size: 14px; color: var(--muted); margin-bottom: 14px; }
.breadcrumb a { text-decoration: none; }
.article-wrap { display: grid; grid-template-columns: minmax(0,1fr) 280px; gap: 44px; align-items: start; }
.article-body { min-width: 0; }
.article-body > section { margin-bottom: 46px; }
.article-body h2 { font-size: 30px; margin-top: 0; }
.article-body h3 { margin-top: 26px; }
.article-body p { color: #455b70; }
.side-nav { position: sticky; top: 96px; padding: 22px; background: #f7fbff; border: 1px solid var(--border); border-radius: 8px; }
.side-nav h3 { font-size: 17px; }
.side-nav a { display: block; padding: 7px 0; text-decoration: none; color: var(--muted); }
.side-nav a:hover { color: var(--blue-dark); }
.notice-list { display: grid; gap: 18px; }
.notice-card { padding: 24px; }
.notice-meta { font-size: 13px; color: var(--blue-dark); font-weight: 700; margin-bottom: 8px; }
.tag { display: inline-flex; padding: 4px 9px; border-radius: 999px; background: var(--blue-soft); color: var(--blue-dark); font-size: 13px; margin-right: 8px; }
.cta-band { padding: 42px; border-radius: 12px; background: linear-gradient(135deg,#3f8fe5,#2875c7); color: #fff; display: flex; align-items: center; justify-content: space-between; gap: 26px; }
.cta-band h2, .cta-band p { color: #fff; }
.cta-band .main-btn { background: #fff; color: var(--blue-dark); 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: 60px 0 34px; display: grid; grid-template-columns: 1.1fr 1.9fr; gap: 60px; }
.footer-brand img { max-height: 48px; width: auto; background: #fff; padding: 7px 10px; border-radius: 8px; }
.footer-brand p { margin-top: 18px; color: rgba(255,255,255,.86); }
.footer-links { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 28px; }
.footer-links h3 { color: #fff; font-size: 17px; }
.footer-links a { display: block; color: rgba(255,255,255,.88); text-decoration: none; padding: 5px 0; }
.footer-risk { width: min(1160px, calc(100% - 40px)); margin: 0 auto; padding: 22px 0; border-top: 1px solid rgba(255,255,255,.22); color: rgba(255,255,255,.86); font-size: 14px; }
.footer-bottom { text-align: center; padding: 18px 20px 24px; border-top: 1px solid rgba(255,255,255,.15); color: rgba(255,255,255,.78); font-size: 14px; }
.maintenance-page { min-height: 100vh; display: grid; place-items: center; padding: 24px; background: linear-gradient(180deg,#f7fbff,#fff); }
.maintenance-card { width: min(620px,100%); text-align: center; padding: 44px; background: #fff; border: 1px solid var(--border); border-radius: 12px; box-shadow: var(--shadow); }
.maintenance-card img { max-height: 52px; width: auto; margin-bottom: 22px; }
.status-text { color: var(--muted); min-height: 30px; }
@media (max-width: 1060px) {
  .nav-core { gap: 2px; }
  .nav-core a { font-size: 14px; padding: 8px 7px; }
  .info-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .review-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
}
@media (max-width: 860px) {
  .nav-core { display: none; }
  .hero-grid, .split, .article-wrap, .footer-inner { grid-template-columns: 1fr; }
  .hero-copy { max-width: none; }
  .hero-visual { margin-top: 6px; }
  .split.reverse .media { order: 0; }
  .category-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .category-card.full { grid-column: 1 / -1; }
  .three-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .side-nav { position: static; }
  .footer-inner { gap: 34px; }
}
@media (max-width: 640px) {
  .header-inner { min-height: 62px; padding: 0 14px; gap: 8px; }
  .site-logo img { max-height: 36px; max-width: 124px; }
  .header-actions { gap: 7px; }
  .header-download { min-height: 44px; padding: 0 13px; font-size: 14px; }
  .menu-button { width: 44px; height: 44px; }
  .container { width: min(100% - 32px,1160px); }
  .section { padding: 58px 0; }
  .hero { padding: 54px 0 48px; }
  .hero-grid { gap: 34px; }
  .hero-actions { align-items: stretch; }
  .hero-actions .main-btn, .hero-actions .text-button { width: 100%; }
  .hero-links { flex-direction: column; gap: 9px; }
  .hero-points, .info-grid, .category-grid, .two-grid, .three-grid, .review-grid, .footer-links { grid-template-columns: 1fr; }
  .category-card.full { grid-column: auto; }
  .category-card { min-height: auto; }
  .content-card { padding: 24px; }
  .cta-band { padding: 30px 24px; align-items: stretch; flex-direction: column; }
  .cta-band .main-btn { width: 100%; }
  .footer-inner { width: min(100% - 32px,1160px); padding-top: 48px; }
  .footer-risk { width: min(100% - 32px,1160px); }
  .maintenance-card { padding: 34px 22px; }
}