:root {
  --blue: #3f8fe5;
  --deep-blue: #2875c7;
  --link-blue: #2f83d8;
  --soft-blue: #eaf4ff;
  --text: #34495e;
  --heading: #1f2d3d;
  --muted: #6f7f90;
  --line: #d8e4f0;
  --soft-line: #e5edf5;
  --light: #f4f7fb;
  --light-2: #eef3f9;
  --shadow: 0 12px 32px rgba(43, 97, 153, .10);
  --content: 1240px;
}
* { 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;
  -webkit-font-smoothing: antialiased;
}
body.drawer-open { overflow: hidden; }
a { color: var(--link-blue); }
a:focus-visible, button:focus-visible { outline: 3px solid rgba(63,143,229,.35); outline-offset: 3px; }
img { max-width: 100%; height: auto; display: block; }
button, a { touch-action: manipulation; }
.container { width: min(var(--content), calc(100% - 40px)); margin-inline: auto; }
.skip-link { position: fixed; left: 16px; top: -100px; z-index: 12000; background: #fff; color: var(--deep-blue); padding: 10px 16px; border-radius: 8px; box-shadow: var(--shadow); }
.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(--soft-line); box-shadow: 0 6px 20px rgba(43,97,153,.08); }
.header-inner { max-width: var(--content); 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; }
.site-logo img { width: 170px; max-height: 44px; object-fit: contain; }
.nav-core { display: flex; align-items: center; justify-content: center; gap: 8px; min-width: 0; }
.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(--deep-blue); background: var(--soft-blue); }
.header-actions { display: flex; align-items: center; gap: 10px; flex: 0 0 auto; }
.main-btn, .secondary-btn, .ghost-btn { min-height: 44px; display: inline-flex; align-items: center; justify-content: center; border-radius: 9px; padding: 0 22px; font-weight: 700; text-decoration: none; position: relative; z-index: 2; pointer-events: auto; }
.main-btn { color: #fff; background: var(--blue); box-shadow: 0 10px 24px rgba(63,143,229,.22); }
.main-btn:hover { background: #2f7fd3; transform: translateY(-1px); }
.main-btn:active { transform: translateY(0); }
.secondary-btn { color: var(--deep-blue); background: #fff; border: 1px solid #a9cbea; }
.secondary-btn:hover { background: var(--soft-blue); }
.ghost-btn { color: var(--link-blue); padding-inline: 0; }
.menu-toggle { width: 46px; height: 46px; padding: 0; border: 1px solid var(--line); border-radius: 10px; 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(--heading); border-radius: 2px; }
.drawer-overlay { position: fixed; inset: 0; z-index: 10000; background: rgba(20,43,67,.45); opacity: 0; transition: opacity .22s ease; }
.drawer-overlay.show { opacity: 1; }
.drawer { position: fixed; top: 0; right: 0; z-index: 10001; width: min(390px, 88vw); height: 100dvh; background: #fff; box-shadow: -18px 0 45px rgba(20,43,67,.18); transform: translateX(102%); transition: transform .24s ease; display: flex; flex-direction: column; }
.drawer.open { transform: translateX(0); }
.drawer-head { min-height: 70px; padding: 12px 20px; display: flex; align-items: center; justify-content: space-between; border-bottom: 1px solid var(--soft-line); }
.drawer-logo img { width: 160px; max-height: 42px; object-fit: contain; }
.drawer-close { width: 44px; height: 44px; border: 0; border-radius: 10px; background: var(--light); color: var(--heading); font-size: 30px; line-height: 1; cursor: pointer; }
.drawer-nav { overflow-y: auto; padding: 14px 20px 24px; display: grid; gap: 4px; }
.drawer-nav a { color: var(--text); text-decoration: none; padding: 11px 12px; min-height: 44px; border-radius: 8px; display: flex; align-items: center; }
.drawer-nav a:hover { color: var(--deep-blue); background: var(--soft-blue); }
.drawer-download { margin: auto 20px 20px; }
.hero { position: relative; overflow: hidden; padding: 78px 0 70px; 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: -160px; top: -180px; background: rgba(63,143,229,.10); }
.hero::after { width: 260px; height: 260px; left: -130px; bottom: -150px; background: rgba(63,143,229,.07); }
.hero-grid { position: relative; z-index: 1; display: grid; grid-template-columns: 1.08fr .92fr; align-items: center; gap: 56px; }
.eyebrow { display: inline-flex; align-items: center; min-height: 34px; padding: 4px 12px; border-radius: 999px; background: var(--soft-blue); color: var(--deep-blue); font-size: 14px; font-weight: 700; }
h1, h2, h3, h4 { color: var(--heading); line-height: 1.3; margin-top: 0; }
h1 { font-size: clamp(38px, 5vw, 64px); letter-spacing: -.035em; margin: 18px 0 20px; }
.hero-subtitle { font-size: clamp(20px, 2.3vw, 29px); color: var(--deep-blue); font-weight: 700; line-height: 1.45; margin: 0 0 18px; }
.hero-copy { font-size: 17px; color: var(--muted); margin-bottom: 26px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 22px; }
.hero-links { display: flex; flex-wrap: wrap; gap: 18px; }
.hero-links a { text-decoration: none; font-weight: 700; }
.hero-points { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 10px 22px; margin: 28px 0 0; padding: 0; list-style: none; }
.hero-points li { position: relative; padding-left: 18px; color: var(--text); }
.hero-points li::before { content: ''; position: absolute; left: 0; top: .72em; width: 7px; height: 7px; border-radius: 50%; background: var(--blue); }
.hero-visual { display: flex; justify-content: center; }
.hero-visual img { width: min(100%, 510px); object-fit: contain; filter: drop-shadow(0 28px 34px rgba(43,97,153,.17)); }
.section { padding: 82px 0; }
.section-light { background: var(--light); }
.section-soft { background: var(--light-2); }
.section-head { max-width: 760px; margin-bottom: 34px; }
.section-head.center { margin-inline: auto; text-align: center; }
.section-kicker { color: var(--deep-blue); font-size: 14px; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; margin-bottom: 8px; }
.section-title { font-size: clamp(30px, 3.4vw, 44px); margin-bottom: 14px; }
.section-desc { margin: 0; color: var(--muted); font-size: 17px; }
.info-grid { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 20px; }
.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 h3 { font-size: 20px; margin-bottom: 10px; color: var(--deep-blue); }
.info-card p { margin: 0; color: var(--muted); }
.category-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 30px; }
.category-card { min-height: 190px; padding: 30px; 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.wide { grid-column: 1 / -1; min-height: 170px; }
.category-card h3 { color: var(--deep-blue); margin-bottom: 10px; font-size: 22px; }
.category-card p { color: var(--muted); margin: 0 0 18px; }
.category-card a { margin-top: auto; font-weight: 700; text-decoration: none; }
.split { display: grid; grid-template-columns: 1fr 1fr; align-items: center; gap: 58px; }
.split.reverse .media { order: 2; }
.media img { width: min(100%, 520px); margin-inline: auto; object-fit: contain; }
.content-copy h2 { font-size: clamp(29px, 3vw, 41px); margin-bottom: 16px; }
.content-copy h3 { color: var(--deep-blue); margin: 28px 0 10px; }
.content-copy p { margin: 0 0 16px; }
.content-copy ul { padding-left: 22px; }
.content-copy li { margin: 7px 0; }
.btn-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 24px; }
.dual-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 28px; }
.content-card { padding: 30px; }
.content-card img { max-height: 250px; margin: 0 auto 24px; }
.content-card h3 { font-size: 25px; color: var(--deep-blue); }
.news-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 22px; }
.news-item { padding: 26px; border-radius: 10px; background: #fff; border: 1px solid var(--line); }
.news-meta { color: var(--deep-blue); font-weight: 700; font-size: 14px; }
.news-item h3 { font-size: 21px; margin: 10px 0; }
.news-item p { color: var(--muted); margin: 0; }
.review-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 22px; }
.review-card { padding: 27px; }
.review-card p { margin: 0 0 14px; }
.review-card span { color: var(--deep-blue); font-size: 14px; font-weight: 700; }
.faq-list { display: grid; gap: 14px; }
details.faq-card { padding: 0; overflow: clip; }
details.faq-card summary { list-style: none; cursor: pointer; padding: 21px 56px 21px 24px; min-height: 62px; position: relative; color: var(--heading); font-weight: 800; }
details.faq-card summary::-webkit-details-marker { display: none; }
details.faq-card summary::after { content: '+'; position: absolute; right: 24px; top: 16px; color: var(--deep-blue); font-size: 28px; line-height: 1; }
details.faq-card[open] summary::after { content: '−'; }
details.faq-card .faq-answer { padding: 0 24px 22px; color: var(--muted); }
.notice { padding: 24px 26px; border-left: 4px solid var(--blue); border-radius: 8px; background: var(--soft-blue); }
.notice strong { color: var(--heading); }
.page-hero { padding: 64px 0 58px; background: linear-gradient(180deg,#fff,#f5faff); border-bottom: 1px solid var(--soft-line); }
.page-hero .container { max-width: 930px; }
.page-hero h1 { font-size: clamp(36px,5vw,56px); }
.page-hero p { max-width: 780px; color: var(--muted); font-size: 18px; }
.breadcrumbs { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; font-size: 14px; color: var(--muted); margin-bottom: 14px; }
.breadcrumbs a { text-decoration: none; }
.article { max-width: 980px; margin: 0 auto; }
.article h2 { font-size: 31px; margin-top: 52px; padding-top: 10px; }
.article h3 { font-size: 23px; margin-top: 30px; color: var(--deep-blue); }
.article p, .article li { font-size: 17px; }
.article ul, .article ol { padding-left: 24px; }
.article li { margin: 8px 0; }
.article .lead { font-size: 19px; color: var(--muted); }
.steps { counter-reset: step; display: grid; gap: 16px; margin: 26px 0; }
.step { counter-increment: step; position: relative; padding: 22px 24px 22px 70px; border: 1px solid var(--line); border-radius: 10px; background: #fff; }
.step::before { content: counter(step); position: absolute; left: 22px; top: 22px; width: 34px; height: 34px; display: grid; place-items: center; border-radius: 50%; background: var(--blue); color: #fff; font-weight: 800; }
.step h3 { margin: 0 0 7px; font-size: 20px; }
.step p { margin: 0; color: var(--muted); }
.table-wrap { overflow-x: auto; margin: 24px 0; border: 1px solid var(--line); border-radius: 10px; }
table { width: 100%; border-collapse: collapse; min-width: 680px; background: #fff; }
th, td { text-align: left; padding: 15px 16px; border-bottom: 1px solid var(--soft-line); vertical-align: top; }
th { background: var(--light); color: var(--heading); }
.cta { padding: 46px; border-radius: 16px; background: linear-gradient(135deg,var(--deep-blue),var(--blue)); color: #fff; display: flex; align-items: center; justify-content: space-between; gap: 30px; }
.cta h2, .cta p { color: #fff; }
.cta h2 { margin-bottom: 8px; }
.cta p { margin: 0; opacity: .9; }
.cta .main-btn { background: #fff; color: var(--deep-blue); box-shadow: none; white-space: nowrap; }
.site-footer { background: #438ddf; color: #fff; padding-top: 58px; }
.footer-grid { display: grid; grid-template-columns: 1.6fr repeat(3,1fr); gap: 40px; }
.footer-grid h2 { color: #fff; font-size: 18px; margin-bottom: 12px; }
.footer-grid a { color: #fff; text-decoration: none; display: block; padding: 4px 0; opacity: .9; }
.footer-grid a:hover { opacity: 1; text-decoration: underline; }
.footer-brand img { width: 170px; max-height: 44px; object-fit: contain; margin-bottom: 18px; filter: brightness(0) invert(1); }
.footer-brand p { max-width: 440px; opacity: .9; }
.footer-brand .footer-download { display: inline-flex; min-height: 44px; align-items: center; padding: 0 18px; border: 1px solid rgba(255,255,255,.7); border-radius: 8px; font-weight: 700; }
.footer-risk { margin-top: 34px; padding: 22px 0; border-top: 1px solid rgba(255,255,255,.22); border-bottom: 1px solid rgba(255,255,255,.22); opacity: .92; }
.footer-bottom { padding: 22px 0 28px; text-align: center; opacity: .86; }
@media (max-width: 1080px) {
  .nav-core { gap: 2px; }
  .nav-core a { padding-inline: 7px; font-size: 14px; }
  .info-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .review-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
}
@media (max-width: 900px) {
  .nav-core { display: none; }
  .hero-grid, .split { grid-template-columns: 1fr; gap: 38px; }
  .split.reverse .media { order: 0; }
  .hero { padding-top: 58px; }
  .hero-copy { max-width: 760px; }
  .hero-visual img { width: min(82vw, 500px); }
  .category-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .category-card.wide { grid-column: 1 / -1; }
  .news-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1.5fr 1fr 1fr; }
  .footer-grid > div:last-child { grid-column: 2 / -1; }
}
@media (max-width: 680px) {
  .container { width: min(100% - 32px, var(--content)); }
  .header-inner { min-height: 62px; padding: 0 14px; gap: 8px; }
  .site-logo img { width: 125px; max-height: 36px; }
  .header-actions { gap: 7px; }
  .header-download { min-height: 44px; padding: 0 13px; font-size: 14px; }
  .menu-toggle { width: 44px; height: 44px; }
  .hero { padding: 48px 0 56px; }
  h1 { font-size: 39px; }
  .hero-subtitle { font-size: 21px; }
  .hero-copy, .section-desc { font-size: 16px; }
  .hero-actions { display: grid; grid-template-columns: 1fr; }
  .hero-actions a { width: 100%; }
  .hero-links { gap: 12px; flex-direction: column; }
  .hero-points { grid-template-columns: 1fr; }
  .section { padding: 60px 0; }
  .info-grid, .category-grid, .dual-grid, .news-grid, .review-grid { grid-template-columns: 1fr; }
  .category-card.wide { grid-column: auto; }
  .category-card { min-height: auto; }
  .content-card { padding: 24px; }
  .page-hero { padding: 46px 0 42px; }
  .page-hero h1 { font-size: 39px; }
  .article h2 { font-size: 27px; margin-top: 42px; }
  .article p, .article li { font-size: 16px; }
  .cta { padding: 30px 24px; flex-direction: column; align-items: flex-start; }
  .cta .main-btn { width: 100%; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 28px; }
  .footer-brand { grid-column: 1 / -1; }
  .footer-grid > div:last-child { grid-column: auto; }
}
@media (max-width: 390px) {
  .site-logo img { width: 108px; }
  .header-download { padding-inline: 10px; font-size: 13px; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-brand, .footer-grid > div:last-child { grid-column: auto; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}