:root {
  --brand: #3f8fe5;
  --brand-deep: #2875c7;
  --brand-soft: #eaf4ff;
  --bg: #ffffff;
  --bg-soft: #f4f7fb;
  --bg-alt: #eef3f9;
  --title: #1f2d3d;
  --text: #34495e;
  --muted: #6f7f90;
  --note: #8c99a8;
  --border: #d8e4f0;
  --line: #e5edf5;
  --shadow: 0 12px 32px rgba(43,97,153,0.10);
  --content: 1240px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: #ffffff; color: #34495e; font-family: Arial, "Microsoft YaHei", sans-serif; line-height: 1.7; overflow-x: hidden; }
body.drawer-open { overflow: hidden; }
a { color: #2f83d8; }
a:focus-visible, button:focus-visible { outline: 3px solid rgba(63,143,229,.35); outline-offset: 3px; }
img { max-width: 100%; height: auto; }
.skip-link { position: fixed; left: 16px; top: -80px; z-index: 12000; background: #fff; color: var(--brand-deep); padding: 10px 14px; border: 1px solid var(--border); border-radius: 8px; }
.skip-link:focus { top: 12px; }
.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 #e5edf5; 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, .footer-logo img { display: block; max-height: 44px; width: auto; }
.nav-core { display: flex; align-items: center; gap: 10px; white-space: nowrap; }
.nav-core a { color: #34495e; text-decoration: none; padding: 8px 9px; border-radius: 8px; font-size: 15px; }
.nav-core a:hover, .nav-core a.active { color: #2875c7; background: #eaf4ff; }
.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: #ffffff; background: #3f8fe5; border-radius: 8px; text-decoration: none; box-shadow: 0 10px 24px rgba(63,143,229,0.22); position: relative; z-index: 2; pointer-events: auto; touch-action: manipulation; transition: .2s ease; }
.main-btn:hover { background: #2f7fd3; transform: translateY(-1px); }
.main-btn:active { transform: translateY(0); }
.secondary-btn { display: inline-flex; min-height: 44px; align-items: center; justify-content: center; padding: 0 20px; border: 1px solid var(--border); border-radius: 8px; text-decoration: none; color: var(--brand-deep); background: #fff; }
.secondary-btn:hover { border-color: var(--brand); background: var(--brand-soft); }
.menu-toggle, .drawer-close { min-width: 44px; min-height: 44px; border: 1px solid var(--border); background: #fff; border-radius: 8px; cursor: pointer; color: var(--title); }
.menu-toggle { display: inline-flex; flex-direction: column; justify-content: center; align-items: center; gap: 4px; }
.menu-toggle span { width: 19px; height: 2px; background: var(--text); border-radius: 2px; }
.drawer-overlay { position: fixed; inset: 0; z-index: 10000; background: rgba(31,45,61,.30); opacity: 0; transition: opacity .2s ease; }
.drawer-overlay.is-visible { opacity: 1; }
.site-drawer { position: fixed; top: 0; right: 0; z-index: 10001; width: min(390px, 88vw); height: 100vh; background: #fff; box-shadow: -18px 0 40px rgba(31,45,61,.16); transform: translateX(105%); transition: transform .24s ease; overflow-y: auto; }
.site-drawer.is-open { transform: translateX(0); }
.drawer-head { display: flex; align-items: center; justify-content: space-between; padding: 18px 20px; border-bottom: 1px solid var(--line); }
.drawer-close { font-size: 26px; line-height: 1; }
.drawer-nav { display: grid; padding: 12px 20px 30px; }
.drawer-nav > a:not(.main-btn) { padding: 12px 8px; color: var(--text); text-decoration: none; border-bottom: 1px solid var(--line); }
.drawer-nav > a.active { color: var(--brand-deep); font-weight: 700; }
.drawer-download { margin-top: 18px; }
.container { width: min(100% - 40px, var(--content)); margin-inline: auto; }
.narrow { width: min(100% - 40px, 900px); margin-inline: auto; }
.site-main { min-height: 60vh; }
.hero { position: relative; overflow: hidden; padding: 88px 0 76px; background: linear-gradient(180deg,#fff 0%,#f8fbff 100%); }
.hero::before, .hero::after { content: ""; position: absolute; border-radius: 50%; background: var(--brand-soft); z-index: 0; }
.hero::before { width: 360px; height: 360px; right: -130px; top: -110px; }
.hero::after { width: 180px; height: 180px; left: -80px; bottom: -60px; opacity: .7; }
.hero-grid { position: relative; z-index: 1; display: grid; grid-template-columns: 1.05fr .95fr; align-items: center; gap: 54px; }
.eyebrow { display: inline-block; margin-bottom: 14px; color: var(--brand-deep); font-weight: 700; letter-spacing: .04em; }
h1,h2,h3,.section-title { color: #1f2d3d; line-height: 1.28; }
h1 { font-size: clamp(38px, 5.2vw, 64px); margin: 0 0 18px; }
h2 { font-size: clamp(28px, 3.2vw, 40px); margin: 0 0 16px; }
h3 { font-size: 21px; margin: 0 0 10px; }
p { margin: 0 0 16px; }
.hero-subtitle { font-size: clamp(20px, 2.3vw, 28px); color: var(--brand-deep); font-weight: 700; margin-bottom: 16px; }
.hero-copy { font-size: 17px; color: var(--muted); max-width: 720px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 28px 0 18px; }
.hero-links { display: flex; flex-wrap: wrap; gap: 18px; margin-top: 18px; }
.text-link { color: #2f83d8; text-decoration-thickness: 1px; text-underline-offset: 4px; }
.hero-points { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 24px; padding: 0; list-style: none; }
.hero-points li { padding: 7px 11px; background: #fff; border: 1px solid var(--border); border-radius: 999px; font-size: 14px; color: var(--text); }
.hero-visual { display: flex; justify-content: center; }
.hero-visual img, .feature-image img, .content-img { max-width: 100%; height: auto; object-fit: contain; display: block; }
.hero-visual img { max-height: 560px; }
.section { padding: 78px 0; }
.section-light { background: #f4f7fb; }
.section-alt { background: #eef3f9; }
.section-head { max-width: 820px; margin-bottom: 34px; }
.section-head.center { text-align: center; margin-inline: auto; }
.section-lead { color: var(--muted); font-size: 17px; }
.info-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 20px; }
.info-card, .category-card, .review-card, .faq-card, .content-card, .notice-card, .step-card { background: #ffffff; border: 1px solid #d8e4f0; border-radius: 8px; box-shadow: 0 8px 24px rgba(43,97,153,0.06); }
.info-card { padding: 24px; }
.info-card p, .category-card p, .review-card p, .faq-card p { color: var(--muted); margin-bottom: 0; }
.category-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 30px; }
.category-card { padding: 28px; border-color: #c6dcf1; transition: .2s ease; }
.category-card:hover { border-color: var(--brand); transform: translateY(-3px); }
.category-card.category-wide { grid-column: 1 / -1; }
.category-card a { display: inline-block; margin-top: 14px; }
.feature-split { display: grid; grid-template-columns: .95fr 1.05fr; gap: 54px; align-items: center; }
.feature-split.reverse { grid-template-columns: 1.05fr .95fr; }
.feature-split.reverse .feature-image { order: 2; }
.feature-image { min-height: 300px; padding: 28px; border: 1px solid var(--border); background: #fff; border-radius: 12px; display: flex; align-items: center; justify-content: center; }
.feature-image img { max-height: 380px; }
.feature-copy p { color: var(--muted); }
.bullet-list { padding-left: 20px; margin: 18px 0 24px; }
.bullet-list li { margin: 7px 0; }
.notice { padding: 17px 18px; border-left: 4px solid var(--brand); background: var(--brand-soft); border-radius: 0 8px 8px 0; color: var(--text); }
.notice.warning { border-left-color: #d5962c; background: #fff8e8; }
.dual-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 26px; }
.content-card { padding: 28px; }
.content-card .feature-image { min-height: 250px; margin-bottom: 22px; }
.link-row { margin-top: 22px; }
.review-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 20px; }
.review-card { padding: 24px; }
.review-card strong { display: block; color: var(--brand-deep); margin-bottom: 8px; }
.faq-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 18px; }
.faq-card { padding: 22px; }
.faq-card h3 { font-size: 18px; }
.risk-panel { padding: 30px; background: #fff; border: 1px solid var(--border); border-radius: 10px; box-shadow: var(--shadow); }
.inner-hero { padding: 64px 0 46px; background: linear-gradient(180deg,#f4f9ff 0%,#fff 100%); border-bottom: 1px solid var(--line); }
.inner-hero h1 { font-size: clamp(34px, 4.4vw, 54px); }
.inner-hero p { max-width: 800px; font-size: 17px; color: var(--muted); }
.breadcrumb { font-size: 14px; margin-bottom: 14px; color: var(--muted); }
.breadcrumb a { text-decoration: none; }
.article { padding: 54px 0 80px; }
.article-section { margin: 0 0 46px; }
.article-section h2 { font-size: 30px; }
.article-section h3 { margin-top: 26px; }
.article-section p, .article-section li { color: #42566c; }
.article-section ul, .article-section ol { padding-left: 23px; }
.article-section li { margin: 8px 0; }
.steps-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 18px; margin-top: 24px; }
.step-card { padding: 22px; }
.step-card .step-no { display: inline-flex; width: 34px; height: 34px; align-items: center; justify-content: center; border-radius: 50%; background: var(--brand-soft); color: var(--brand-deep); font-weight: 700; margin-bottom: 12px; }
.term-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 18px; }
.term-grid .content-card { box-shadow: none; }
.faq-list details { background: #fff; border: 1px solid var(--border); border-radius: 8px; margin: 14px 0; padding: 0 20px; }
.faq-list summary { cursor: pointer; padding: 18px 0; color: var(--title); font-weight: 700; }
.faq-list details p { padding-bottom: 18px; margin-bottom: 0; }
.notice-list { display: grid; gap: 16px; }
.notice-card { padding: 24px; }
.notice-meta { font-size: 13px; color: var(--brand-deep); font-weight: 700; margin-bottom: 6px; }
.kicker-list { display: flex; flex-wrap: wrap; gap: 10px; margin: 18px 0 0; }
.kicker-list span { background: var(--brand-soft); color: var(--brand-deep); border: 1px solid #cae4fc; padding: 6px 10px; border-radius: 999px; font-size: 14px; }
.site-footer { background: #438ddf; color: #ffffff; }
.footer-inner { width: min(100% - 40px, var(--content)); margin: auto; display: grid; grid-template-columns: 1.1fr 1.9fr; gap: 50px; padding: 58px 0 34px; }
.footer-logo { display: inline-flex; background: rgba(255,255,255,.97); padding: 7px 10px; border-radius: 8px; margin-bottom: 16px; }
.footer-brand p { max-width: 430px; color: rgba(255,255,255,.90); }
.footer-links { display: grid; grid-template-columns: repeat(3,1fr); gap: 28px; }
.footer-links h2 { color: #fff; font-size: 17px; margin-bottom: 12px; }
.footer-links a { display: block; color: rgba(255,255,255,.92); text-decoration: none; margin: 7px 0; }
.footer-links a:hover { text-decoration: underline; }
.footer-risk { width: min(100% - 40px, var(--content)); margin: auto; padding: 20px 0; border-top: 1px solid rgba(255,255,255,.24); color: rgba(255,255,255,.90); font-size: 14px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.18); text-align: center; padding: 18px 20px 24px; font-size: 14px; color: rgba(255,255,255,.82); }
@media (max-width: 1080px) {
  .nav-core { gap: 2px; }
  .nav-core a { padding-inline: 7px; font-size: 14px; }
  .info-grid { grid-template-columns: repeat(2,1fr); }
  .review-grid { grid-template-columns: repeat(2,1fr); }
}
@media (max-width: 900px) {
  .nav-core { display: none; }
  .hero-grid, .feature-split, .feature-split.reverse, .dual-grid { grid-template-columns: 1fr; }
  .feature-split.reverse .feature-image { order: 0; }
  .category-grid { grid-template-columns: repeat(2,1fr); }
  .category-card.category-wide { grid-column: 1 / -1; }
  .footer-inner { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  .header-inner { min-height: 62px; padding: 0 16px; gap: 10px; }
  .site-logo img { max-height: 36px; max-width: 132px; }
  .header-actions { gap: 7px; }
  .header-download { min-height: 44px; padding: 0 14px; font-size: 14px; }
  .container, .narrow { width: min(100% - 32px, var(--content)); }
  .hero { padding: 54px 0 50px; }
  .hero-grid { gap: 34px; }
  .hero-visual img { max-height: 430px; }
  .section { padding: 58px 0; }
  .category-grid, .info-grid, .review-grid, .faq-grid, .steps-grid, .term-grid { grid-template-columns: 1fr; }
  .category-card.category-wide { grid-column: auto; }
  .feature-image { min-height: 220px; padding: 20px; }
  .footer-links { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 480px) {
  .header-download { padding: 0 11px; }
  .site-logo img { max-width: 110px; }
  h1 { font-size: 36px; }
  .hero-actions > a { width: 100%; }
  .hero-links { display: grid; gap: 9px; }
  .category-card, .info-card, .content-card, .review-card, .faq-card, .risk-panel { padding: 21px; }
  .footer-links { grid-template-columns: 1fr; }
}