:root {
  --blue: #3f8fe5;
  --blue-deep: #2875c7;
  --blue-soft: #eaf4ff;
  --text: #34495e;
  --title: #1f2d3d;
  --muted: #6f7f90;
  --line: #d8e4f0;
  --light: #f4f7fb;
  --lighter: #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: var(--blue-deep); }
img { max-width: 100%; }
button, a { -webkit-tap-highlight-color: transparent; }
.skip-link { position: fixed; left: 12px; top: -60px; z-index: 12000; background: #fff; padding: 10px 14px; border: 2px solid var(--blue); border-radius: 8px; }
.skip-link:focus { top: 12px; }
.container { width: min(1160px, calc(100% - 40px)); margin: 0 auto; }
.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 { 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; flex: 1; }
.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-deep); background: var(--blue-soft); }
.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: 9px; text-decoration: none; font-weight: 700; position: relative; z-index: 2;
  pointer-events: auto; touch-action: manipulation; transition: transform .2s ease, background .2s ease, border-color .2s ease;
}
.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); }
.secondary-btn { color: var(--blue-deep); background: #fff; border: 1px solid var(--line); }
.secondary-btn:hover { border-color: var(--blue); transform: translateY(-1px); }
.main-btn:focus-visible, .secondary-btn:focus-visible, a:focus-visible, button:focus-visible { outline: 3px solid rgba(63,143,229,.38); outline-offset: 3px; }
.menu-toggle { width: 46px; height: 46px; padding: 0; border: 1px solid var(--line); background: #fff; border-radius: 9px; cursor: pointer; display: inline-flex; flex-direction: column; align-items: center; justify-content: center; gap: 5px; position: relative; z-index: 3; }
.menu-toggle span { width: 20px; height: 2px; background: var(--title); border-radius: 3px; }
.drawer-mask { position: fixed; inset: 0; z-index: 10000; background: rgba(22,39,58,.42); opacity: 0; transition: opacity .22s ease; }
.drawer-mask.visible { opacity: 1; }
.site-drawer { position: fixed; top: 0; right: 0; z-index: 10001; width: min(360px, 90vw); height: 100dvh; background: #fff; padding: 20px; transform: translateX(102%); transition: transform .22s ease; overflow-y: auto; box-shadow: -20px 0 50px rgba(28,65,103,.18); }
.site-drawer.open { transform: translateX(0); }
.drawer-top { display: flex; align-items: center; justify-content: space-between; padding-bottom: 16px; border-bottom: 1px solid #e5edf5; }
.drawer-close { width: 44px; height: 44px; border: 0; border-radius: 9px; background: var(--light); color: var(--title); font-size: 30px; line-height: 1; cursor: pointer; }
.drawer-nav { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; padding: 18px 0; }
.drawer-nav a { color: var(--text); text-decoration: none; padding: 10px 12px; border-radius: 8px; border: 1px solid transparent; }
.drawer-nav a:hover { color: var(--blue-deep); background: var(--blue-soft); border-color: #cfe5fb; }
.drawer-download { width: 100%; }
.hero { position: relative; overflow: hidden; padding: 86px 0 76px; background: linear-gradient(180deg,#fff 0%,#f8fbff 100%); }
.hero::before, .hero::after { content: ""; position: absolute; border-radius: 999px; pointer-events: none; }
.hero::before { width: 420px; height: 420px; right: -150px; top: -140px; background: rgba(63,143,229,.08); }
.hero::after { width: 230px; height: 230px; left: -90px; bottom: -100px; background: rgba(63,143,229,.06); }
.hero-grid { display: grid; grid-template-columns: 1.08fr .92fr; align-items: center; gap: 64px; position: relative; z-index: 1; }
.eyebrow { color: var(--blue-deep); font-weight: 700; letter-spacing: .08em; margin: 0 0 10px; }
h1, h2, h3, .section-title { color: var(--title); line-height: 1.3; }
h1 { margin: 0 0 18px; font-size: clamp(38px, 5vw, 66px); letter-spacing: -.035em; }
.hero h1 { max-width: 680px; }
.hero-subtitle { font-size: clamp(20px,2.2vw,28px); color: var(--blue-deep); font-weight: 700; margin: 0 0 18px; }
.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; }
.hero-links a { text-decoration: none; font-weight: 700; }
.hero-points { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 26px; padding: 0; list-style: none; }
.hero-points li { background: #fff; border: 1px solid var(--line); border-radius: 999px; padding: 7px 12px; color: #45657f; font-size: 14px; }
.hero-visual { display: flex; justify-content: center; }
.hero-visual img { max-width: 100%; height: auto; object-fit: contain; display: block; filter: drop-shadow(0 25px 42px rgba(43,97,153,.16)); }
section { padding: 78px 0; }
.section-light { background: var(--light); }
.section-heading { max-width: 760px; margin: 0 auto 38px; text-align: center; }
.section-heading.left { text-align: left; margin-left: 0; }
.section-heading h2 { font-size: clamp(30px,3vw,44px); margin: 0 0 12px; }
.section-heading p { margin: 0; color: var(--muted); }
.info-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 20px; }
.category-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 30px; }
.category-card, .info-card, .review-card, .faq-card, .article-card { background: #fff; border: 1px solid var(--line); border-radius: 8px; box-shadow: 0 8px 24px rgba(43,97,153,.06); }
.info-card, .category-card, .review-card, .faq-card, .article-card { padding: 26px; }
.info-card h3, .category-card h3, .article-card h3 { margin: 0 0 10px; font-size: 21px; }
.info-card p, .category-card p, .review-card p, .faq-card p, .article-card p { margin: 0; color: var(--muted); }
.category-card { min-height: 220px; 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 .text-link { margin-top: auto; padding-top: 20px; text-decoration: none; font-weight: 700; }
.category-card.full { grid-column: 1 / -1; min-height: auto; }
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 58px; align-items: center; }
.split.reverse .feature-image { order: 2; }
.feature-image { min-width: 0; }
.feature-image img, .content-img { max-width: 100%; height: auto; object-fit: contain; display: block; }
.feature-copy h2 { font-size: clamp(30px,3vw,44px); margin: 0 0 16px; }
.feature-copy p { color: var(--muted); }
.feature-list { padding-left: 20px; }
.feature-list li { margin-bottom: 8px; }
.dual-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 30px; }
.dual-panel { padding: 32px; border: 1px solid var(--line); border-radius: 10px; background: #fff; }
.dual-panel img { width: 100%; max-height: 290px; object-fit: contain; margin-bottom: 22px; }
.review-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 20px; }
.review-card strong { display: block; color: var(--blue-deep); margin-bottom: 8px; }
.faq-list { display: grid; gap: 14px; }
.faq-card h3 { margin: 0 0 8px; font-size: 19px; }
.notice { border-left: 4px solid var(--blue); background: var(--blue-soft); padding: 18px 20px; border-radius: 0 8px 8px 0; }
.notice.warning { border-left-color: #df9a24; background: #fff8e8; }
.page-hero { padding: 66px 0 54px; background: linear-gradient(180deg,#f8fbff 0%,#fff 100%); border-bottom: 1px solid #e5edf5; }
.page-hero h1 { font-size: clamp(36px,4.4vw,56px); }
.page-hero p { max-width: 800px; font-size: 18px; color: var(--muted); }
.breadcrumb { margin-bottom: 14px; color: var(--muted); font-size: 14px; }
.breadcrumb a { text-decoration: none; }
.article { max-width: 900px; margin: 0 auto; }
.article h2 { margin-top: 42px; font-size: 30px; }
.article h3 { margin-top: 28px; font-size: 22px; }
.article p, .article li { color: #50677d; }
.article .lead { font-size: 19px; color: #405d77; }
.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(--line); padding: 12px; text-align: left; vertical-align: top; }
.article th { background: var(--light); color: var(--title); }
.steps { counter-reset: step; display: grid; gap: 16px; padding: 0; list-style: none; }
.steps li { position: relative; padding: 22px 22px 22px 70px; border: 1px solid var(--line); border-radius: 8px; background: #fff; }
.steps li::before { counter-increment: step; content: counter(step); position: absolute; left: 20px; top: 20px; width: 34px; height: 34px; border-radius: 50%; display: grid; place-items: center; background: var(--blue); color: #fff; font-weight: 700; }
.cta-band { background: var(--blue); color: #fff; border-radius: 14px; padding: 38px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.cta-band h2 { color: #fff; margin: 0 0 8px; }
.cta-band p { margin: 0; color: rgba(255,255,255,.86); }
.cta-band .secondary-btn { border-color: #fff; color: var(--blue-deep); }
.site-footer { background: #438ddf; color: #fff; padding: 58px 0 24px; }
.footer-grid { display: grid; grid-template-columns: 1.5fr repeat(3,1fr); gap: 34px; }
.footer-grid h2 { color: #fff; font-size: 17px; margin: 0 0 12px; }
.footer-grid a { display: block; color: rgba(255,255,255,.88); text-decoration: none; margin: 7px 0; }
.footer-grid a:hover { color: #fff; text-decoration: underline; }
.footer-brand p { color: rgba(255,255,255,.84); max-width: 480px; }
.footer-logo img { background: #fff; border-radius: 8px; padding: 5px 8px; }
.footer-risk { margin-top: 36px; padding-top: 22px; border-top: 1px solid rgba(255,255,255,.22); color: rgba(255,255,255,.9); }
.footer-bottom { margin-top: 18px; color: rgba(255,255,255,.72); font-size: 14px; }
.announcement-list { display: grid; gap: 16px; }
.announcement { padding: 24px; border: 1px solid var(--line); background: #fff; border-radius: 8px; }
.announcement small { color: var(--blue-deep); font-weight: 700; }
.announcement h2 { font-size: 23px; margin: 8px 0; }
.contact-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 22px; }
.contact-card { padding: 28px; border: 1px solid var(--line); border-radius: 10px; background: #fff; }
.contact-card h2 { margin-top: 0; }
@media (max-width: 1050px) {
  .nav-core { gap: 2px; }
  .nav-core a { font-size: 14px; padding: 7px 8px; }
  .info-grid { grid-template-columns: repeat(2,1fr); }
  .hero-grid { gap: 34px; }
}
@media (max-width: 900px) {
  .nav-core { display: none; }
  .header-inner { min-height: 64px; }
  .hero { padding-top: 56px; }
  .hero-grid, .split { grid-template-columns: 1fr; }
  .split.reverse .feature-image { order: 0; }
  .hero-visual img { max-height: 510px; }
  .category-grid { grid-template-columns: repeat(2,1fr); }
  .category-card.full { grid-column: 1 / -1; }
  .review-grid { grid-template-columns: repeat(2,1fr); }
  .footer-grid { grid-template-columns: repeat(2,1fr); }
}
@media (max-width: 680px) {
  .container { width: min(100% - 32px, 1160px); }
  .header-inner { padding: 0 12px; gap: 8px; }
  .site-logo img { max-height: 34px; max-width: 120px; }
  .header-download { min-height: 44px; padding: 0 14px; font-size: 14px; }
  .menu-toggle { width: 44px; height: 44px; }
  .hero { padding: 44px 0 54px; }
  h1 { font-size: 38px; }
  .hero-subtitle { font-size: 21px; }
  .hero-actions { display: grid; grid-template-columns: 1fr; }
  .hero-actions a { width: 100%; }
  section { padding: 58px 0; }
  .info-grid, .category-grid, .dual-grid, .review-grid, .contact-grid, .footer-grid { grid-template-columns: 1fr; }
  .category-card.full { grid-column: auto; }
  .category-card { min-height: auto; }
  .drawer-nav { grid-template-columns: 1fr; }
  .cta-band { padding: 28px; align-items: stretch; flex-direction: column; }
  .cta-band a { width: 100%; }
  .page-hero { padding: 46px 0 38px; }
  .article h2 { font-size: 27px; }
}