:root {
  --primary: #2563eb;
  --primary-dark: #1e40af;
  --primary-soft: #eff6ff;
  --ink: #0f172a;
  --text: #334155;
  --muted: #64748b;
  --line: #e2e8f0;
  --light: #f8fafc;
  --lighter: #f1f5f9;
  --shadow: 0 20px 50px rgba(37, 99, 235, 0.08);
  --shadow-hover: 0 24px 60px rgba(37, 99, 235, 0.14);
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: #fff;
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body.drawer-open { overflow: hidden; }

a { color: var(--primary-dark); text-decoration: none; transition: color var(--transition); }

img { max-width: 100%; height: auto; display: block; }

button, a { -webkit-tap-highlight-color: transparent; }

button:focus-visible, a:focus-visible { outline: 3px solid rgba(37,99,235,.25); outline-offset: 3px; }

.skip-link {
  position: fixed;
  left: 16px;
  top: -100px;
  z-index: 12000;
  padding: 10px 16px;
  color: #fff;
  background: var(--primary-dark);
  border-radius: 10px;
  font-weight: 600;
  transition: top 0.3s ease;
}

.skip-link:focus { top: 12px; }

.site-header {
  position: sticky;
  top: 0;
  width: 100%;
  z-index: 9999;
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(20px) saturate(1.4);
  border-bottom: 1px solid var(--line);
  box-shadow: 0 1px 3px rgba(15,23,42,.04);
}

.header-inner {
  max-width: 1240px;
  min-height: 72px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.site-logo { display: inline-flex; flex: 0 0 auto; }

.site-logo img { display: block; max-height: 44px; width: auto; object-fit: contain; }

.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 12px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 500;
  transition: all var(--transition);
}

.nav-core a:hover, .nav-core a.active { color: var(--primary); background: var(--primary-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: 46px;
  padding: 0 24px;
  color: #fff;
  background: linear-gradient(135deg, var(--primary) 0%, #3b82f6 100%);
  border-radius: 14px;
  text-decoration: none;
  box-shadow: 0 8px 24px rgba(37,99,235,.28);
  position: relative;
  z-index: 2;
  pointer-events: auto;
  touch-action: manipulation;
  transition: all var(--transition);
  border: 1px solid transparent;
  font-weight: 700;
  letter-spacing: 0.01em;
  font-size: 15px;
}

.main-btn:hover {
  color: #fff;
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(37,99,235,.35);
}

.secondary-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 22px;
  border: 1.5px solid rgba(37,99,235,.25);
  color: var(--primary);
  background: #fff;
  border-radius: 14px;
  text-decoration: none;
  font-weight: 700;
  transition: all var(--transition);
  letter-spacing: 0.01em;
  font-size: 15px;
}

.secondary-btn:hover { background: var(--primary-soft); border-color: var(--primary); transform: translateY(-1px); color: var(--primary-dark); }

.menu-button {
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fff;
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  cursor: pointer;
  position: relative;
  z-index: 3;
  transition: all var(--transition);
}

.menu-button:hover { border-color: var(--primary); background: var(--primary-soft); }

.menu-button span { width: 19px; height: 2px; border-radius: 2px; background: var(--ink); display: block; transition: all var(--transition); }

.drawer-overlay {
  position: fixed;
  inset: 0;
  z-index: 10000;
  background: rgba(15,23,42,.5);
  opacity: 0;
  transition: opacity .22s ease;
}

.drawer-overlay.is-open { opacity: 1; }

.site-drawer {
  position: fixed;
  top: 0;
  right: 0;
  z-index: 10001;
  width: min(390px, 90vw);
  height: 100dvh;
  padding: 18px 20px 26px;
  background: #fff;
  box-shadow: -20px 0 48px rgba(15,23,42,.16);
  transform: translateX(105%);
  transition: transform .25s ease;
  overflow-y: auto;
}

.site-drawer.is-open { transform: translateX(0); }

.drawer-head { display: flex; align-items: center; justify-content: space-between; padding-bottom: 14px; border-bottom: 1px solid var(--line); }

.drawer-logo img { display: block; max-height: 42px; width: auto; }

.drawer-close {
  width: 44px;
  height: 44px;
  border: 0;
  background: var(--light);
  color: var(--ink);
  font-size: 30px;
  line-height: 1;
  border-radius: 50%;
  cursor: pointer;
  transition: all var(--transition);
}

.drawer-close:hover { background: var(--primary-soft); color: var(--primary); }

.drawer-nav { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; padding: 20px 0; }

.drawer-nav a {
  min-height: 44px;
  display: flex;
  align-items: center;
  padding: 9px 12px;
  border-radius: 10px;
  color: var(--text);
  text-decoration: none;
  background: var(--light);
  font-weight: 500;
  transition: all var(--transition);
}

.drawer-nav a:hover { background: var(--primary-soft); color: var(--primary); }

.drawer-download { width: 100%; }

main { min-height: 60vh; }

.container { width: min(1160px, calc(100% - 48px)); margin: 0 auto; }

.section { padding: 100px 0; }

.section-light { background: var(--light); }

.section-soft { background: var(--lighter); }

.section-heading { max-width: 720px; margin: 0 auto 56px; text-align: center; }

.eyebrow {
  display: inline-block;
  margin-bottom: 12px;
  color: var(--primary);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  background: var(--primary-soft);
  padding: 6px 14px;
  border-radius: 999px;
}

h1, h2, h3, .section-title { color: var(--ink); line-height: 1.25; margin-top: 0; }

h1 { font-size: clamp(36px, 5.2vw, 64px); letter-spacing: -.03em; font-weight: 800; }

h2 { font-size: clamp(28px, 3.4vw, 44px); font-weight: 700; }

h3 { font-size: 20px; font-weight: 700; }

p { margin: 0 0 1em; }

.lead { font-size: 19px; color: var(--muted); line-height: 1.6; font-weight: 400; }

.hero {
  position: relative;
  overflow: hidden;
  padding: 100px 0 110px;
  background: linear-gradient(180deg, #ffffff 0%, #eff6ff 50%, #dbeafe 100%);
}

.hero::before, .hero::after { content: ""; position: absolute; border-radius: 50%; pointer-events: none; filter: blur(80px); opacity: .6; }

.hero::before { width: 500px; height: 500px; right: -200px; top: -180px; background: rgba(37,99,235,.12); }

.hero::after { width: 360px; height: 360px; left: -140px; bottom: -140px; background: rgba(59,130,246,.1); }

.hero-grid { position: relative; z-index: 1; display: grid; grid-template-columns: 1.1fr .9fr; align-items: center; gap: 60px; }

.hero-copy { max-width: 640px; }

.hero-copy h1 { margin-bottom: 20px; }

.hero-copy .lead { font-size: 22px; color: var(--text); margin-bottom: 20px; font-weight: 500; }

.hero-copy p { color: var(--muted); line-height: 1.8; }

.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin: 32px 0 24px; }

.hero-links { display: flex; flex-wrap: wrap; gap: 24px; font-size: 14px; }

.hero-links a { color: var(--primary); text-decoration: none; font-weight: 600; position: relative; }

.hero-links a::after {
  content: '';
  position: absolute;
  bottom: -3px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary);
  transition: width var(--transition);
  border-radius: 2px;
}

.hero-links a:hover::after { width: 100%; }

.hero-badges { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 12px; margin-top: 32px; }

.hero-badge {
  padding: 14px 16px;
  border: 1px solid rgba(37,99,235,.12);
  border-radius: 16px;
  background: rgba(255,255,255,.9);
  color: var(--text);
  font-size: 14px;
  font-weight: 500;
  transition: all var(--transition);
  backdrop-filter: blur(8px);
}

.hero-badge:hover { border-color: rgba(37,99,235,.3); background: #fff; transform: translateY(-2px); box-shadow: 0 8px 20px rgba(37,99,235,.08); }

.hero-visual { display: flex; justify-content: center; align-items: center; min-width: 0; }

.hero-visual img { display: block; width: min(100%, 480px); object-fit: contain; filter: drop-shadow(0 32px 48px rgba(37,99,235,.15)); transition: transform 0.6s ease; }

.hero-visual img:hover { transform: translateY(-6px) scale(1.02); }

.info-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 20px; margin-top: -32px; position: relative; z-index: 3; }

.info-card, .category-card, .review-card, .faq-card, .content-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 20px;
  box-shadow: var(--shadow);
  transition: all var(--transition);
}

.info-card { padding: 28px; position: relative; overflow: hidden; }

.info-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), #60a5fa);
  opacity: 0;
  transition: opacity var(--transition);
}

.info-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); border-color: rgba(37,99,235,.2); }

.info-card:hover::before { opacity: 1; }

.info-card strong { display: block; color: var(--ink); font-size: 17px; margin-bottom: 10px; font-weight: 700; }

.info-card p { color: var(--muted); font-size: 14px; margin: 0; line-height: 1.7; }

.category-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; }

.category-card { padding: 32px; min-height: 200px; display: flex; flex-direction: column; border-radius: 20px; }

.category-card:hover { border-color: rgba(37,99,235,.25); transform: translateY(-6px); box-shadow: var(--shadow-hover); }

.category-card h3 { color: var(--primary-dark); margin-bottom: 10px; font-size: 20px; }

.category-card p { color: var(--muted); margin-bottom: 20px; line-height: 1.7; flex: 1; }

.category-card a { margin-top: auto; text-decoration: none; font-weight: 700; color: var(--primary); }

.category-card.wide { grid-column: 1 / -1; min-height: auto; flex-direction: row; align-items: center; gap: 40px; }

.category-card.wide h3 { margin-bottom: 0; white-space: nowrap; }

.category-card.wide p { margin-bottom: 0; }

.split { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }

.split.reverse .split-media { order: 2; }

.split-media { min-width: 0; }

.split-media img { display: block; width: 100%; max-height: 440px; object-fit: contain; transition: transform 0.5s ease; border-radius: 24px; }

.split-media img:hover { transform: scale(1.02); }

.split-copy p { color: var(--muted); line-height: 1.85; font-size: 16px; }

.dual-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }

.content-card { padding: 36px; border-radius: 24px; position: relative; overflow: hidden; }

.content-card:hover { border-color: rgba(37,99,235,.2); box-shadow: var(--shadow-hover); transform: translateY(-3px); }

.content-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(180deg, var(--primary), #60a5fa);
  opacity: 0;
  transition: opacity var(--transition);
}

.content-card:hover::before { opacity: 1; }

.content-card img { width: 100%; height: 200px; object-fit: contain; margin-bottom: 24px; transition: transform 0.4s ease; }

.content-card:hover img { transform: scale(1.03); }

.content-card h2 { font-size: 26px; margin-bottom: 12px; }

.content-card h3 { margin-bottom: 10px; color: var(--ink); }

.content-card p { color: var(--muted); line-height: 1.8; margin: 0; }

.link-arrow { font-weight: 700; text-decoration: none; }

.review-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; }

.review-card { padding: 28px; border-radius: 20px; }

.review-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-hover); border-color: rgba(37,99,235,.15); }

.review-card p { color: var(--muted); font-style: italic; line-height: 1.75; font-size: 15px; }

.review-card strong { color: var(--ink); display: block; margin-top: 16px; font-size: 14px; font-weight: 700; }

.faq-list { display: grid; gap: 16px; }

details.faq-card { padding: 0; overflow: hidden; border-radius: 16px; }

details.faq-card:hover { border-color: rgba(37,99,235,.2); }

details.faq-card summary {
  cursor: pointer;
  padding: 22px 28px;
  list-style: none;
  color: var(--ink);
  font-weight: 700;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  transition: all var(--transition);
  font-size: 16px;
  align-items: center;
}

details.faq-card summary:hover { background: var(--primary-soft); color: var(--primary-dark); }

details.faq-card summary::after { content: "+"; color: var(--primary); font-size: 26px; line-height: 1; font-weight: 400; transition: transform var(--transition); }

details.faq-card[open] summary::after { content: "−"; transform: rotate(0deg); }

details.faq-card[open] summary { background: var(--primary-soft); color: var(--primary-dark); }

details.faq-card p { margin: 0; padding: 0 28px 24px; color: var(--muted); line-height: 1.8; font-size: 15px; }

.notice {
  border-left: 4px solid var(--primary);
  background: var(--primary-soft);
  padding: 24px 28px;
  border-radius: 0 16px 16px 0;
  font-weight: 500;
  line-height: 1.75;
  font-size: 15px;
}

.notice.warning { border-left-color: #d97706; background: #fffbeb; }

.cta-band {
  background: linear-gradient(135deg, var(--primary) 0%, #1e40af 100%);
  color: #fff;
  border-radius: 24px;
  padding: 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  box-shadow: 0 24px 56px rgba(37,99,235,.25);
  position: relative;
  overflow: hidden;
}

.cta-band::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -10%;
  width: 400px;
  height: 400px;
  background: rgba(255,255,255,.06);
  border-radius: 50%;
  pointer-events: none;
}

.cta-band h2, .cta-band p { color: #fff; position: relative; z-index: 1; }

.cta-band h2 { margin-bottom: 8px; font-size: 32px; }

.cta-band .secondary-btn { border-color: rgba(255,255,255,.4); color: #fff; background: rgba(255,255,255,.1); position: relative; z-index: 1; }

.cta-band .secondary-btn:hover { background: rgba(255,255,255,.2); transform: translateY(-2px); border-color: rgba(255,255,255,.6); }

.page-hero { padding: 70px 0 58px; background: linear-gradient(180deg,#eff6ff 0%,#fff 100%); border-bottom: 1px solid var(--line); }

.page-hero .container { max-width: 900px; }

.page-hero h1 { font-size: clamp(34px,4vw,54px); margin-bottom: 16px; }

.page-hero p { font-size: 18px; color: var(--muted); max-width: 780px; }

.breadcrumb { font-size: 14px; margin-bottom: 18px; color: var(--muted); }

.breadcrumb a { text-decoration: none; }

.article-layout { display: grid; grid-template-columns: minmax(0,1fr) 300px; gap: 42px; align-items: start; }

.article { min-width: 0; }

.article h2 { margin-top: 46px; font-size: 30px; scroll-margin-top: 100px; }

.article h3 { margin-top: 30px; }

.article p, .article li { color: #526578; }

.article ul, .article ol { padding-left: 22px; }

.article img { display: block; width: 100%; max-height: 460px; object-fit: contain; margin: 28px 0; }

.side-nav { position: sticky; top: 96px; padding: 24px; background: var(--light); border: 1px solid var(--line); border-radius: 16px; }

.side-nav h2 { font-size: 18px; }

.side-nav a { display: block; padding: 8px 0; text-decoration: none; border-bottom: 1px solid var(--line); transition: color var(--transition); }

.side-nav a:hover { color: var(--primary); }

.side-nav a:last-child { border-bottom: 0; }

.steps { counter-reset: step; display: grid; gap: 18px; margin: 24px 0; }

.step { position: relative; padding: 22px 22px 22px 66px; border: 1px solid var(--line); border-radius: 12px; background: #fff; }

.step::before { counter-increment: step; content: counter(step); position: absolute; left: 20px; top: 22px; width: 30px; height: 30px; display: grid; place-items: center; border-radius: 50%; background: var(--primary); color: #fff; font-weight: 700; }

.news-list { display: grid; gap: 20px; }

.news-item { padding: 28px; border: 1px solid var(--line); border-radius: 20px; background: #fff; transition: all var(--transition); }

.news-item:hover { border-color: rgba(37,99,235,.2); transform: translateY(-3px); box-shadow: var(--shadow); }

.news-meta { color: var(--primary); font-size: 13px; font-weight: 700; margin-bottom: 10px; letter-spacing: .05em; text-transform: uppercase; }

.news-item h3 { margin-bottom: 10px; color: var(--ink); font-size: 20px; }

.news-item p { color: var(--muted); margin: 0; line-height: 1.75; font-size: 15px; }

.tag-row { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 20px; }

.tag { display: inline-flex; min-height: 34px; align-items: center; padding: 0 14px; border-radius: 999px; background: var(--primary-soft); color: var(--primary-dark); font-size: 14px; font-weight: 600; }

.contact-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 22px; }

.contact-card { padding: 26px; border: 1px solid var(--line); border-radius: 12px; background: #fff; }

.site-footer { background: #0f172a; color: #fff; }

.footer-inner { width: min(1160px, calc(100% - 48px)); margin: 0 auto; padding: 64px 0 48px; display: grid; grid-template-columns: 1.1fr 1.9fr; gap: 58px; }

.footer-brand img { display: block; max-height: 44px; width: auto; filter: brightness(0) invert(1); }

.footer-brand p { max-width: 440px; margin-top: 18px; color: rgba(255,255,255,.75); line-height: 1.8; font-size: 15px; }

.footer-links { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; }

.footer-links h2 { color: #fff; font-size: 17px; margin-bottom: 12px; font-weight: 700; }

.footer-links a { display: block; color: rgba(255,255,255,.75); text-decoration: none; margin: 7px 0; transition: all var(--transition); font-size: 15px; }

.footer-links a:hover { color: #fff; text-decoration: underline; }

.footer-risk { width: min(1160px, calc(100% - 48px)); margin: 0 auto; padding: 24px 0; border-top: 1px solid rgba(255,255,255,.15); color: rgba(255,255,255,.8); line-height: 1.75; font-size: 14px; }

.footer-bottom { padding: 24px; text-align: center; border-top: 1px solid rgba(255,255,255,.1); color: rgba(255,255,255,.6); font-size: 14px; }

@media (max-width: 1060px) {
  .nav-core { display: none; }
  .info-grid { grid-template-columns: repeat(2,1fr); }
  .category-grid { grid-template-columns: repeat(2,1fr); }
  .category-card.wide { grid-column: 1 / -1; flex-direction: column; align-items: flex-start; gap: 0; }
  .category-card.wide h3 { margin-bottom: 10px; white-space: normal; }
  .review-grid { grid-template-columns: repeat(2,1fr); }
  .article-layout { grid-template-columns: 1fr; }
  .side-nav { position: static; }
}

@media (max-width: 768px) {
  .header-inner { min-height: 64px; padding: 0 16px; gap: 10px; }
  .site-logo img { max-height: 34px; max-width: 132px; }
  .header-actions { gap: 7px; }
  .header-download { min-height: 44px; padding: 0 14px; font-size: 14px; }
  .menu-button { width: 44px; height: 44px; }
  .drawer-nav { grid-template-columns: 1fr; }
  .container { width: min(100% - 32px, 1160px); }
  .section { padding: 72px 0; }
  .hero { padding: 56px 0 64px; }
  .hero-grid, .split, .dual-grid { grid-template-columns: 1fr; gap: 40px; }
  .split.reverse .split-media { order: 0; }
  .hero-copy { text-align: left; }
  .hero-copy .lead { font-size: 18px; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .hero-actions a { width: 100%; }
  .hero-links { gap: 12px 18px; }
  .hero-badges { grid-template-columns: 1fr; }
  .hero-visual img { max-height: 420px; }
  .info-grid { grid-template-columns: 1fr; margin-top: 0; padding-top: 24px; }
  .category-grid, .review-grid, .contact-grid { grid-template-columns: 1fr; gap: 16px; }
  .category-card.wide { grid-column: auto; }
  .content-card { padding: 28px; }
  .content-card h2 { font-size: 22px; }
  .cta-band { padding: 32px 24px; flex-direction: column; align-items: flex-start; gap: 24px; }
  .cta-band h2 { font-size: 26px; }
  .page-hero { padding: 48px 0 42px; }
  .article h2 { font-size: 27px; }
  .footer-inner { grid-template-columns: 1fr; gap: 34px; padding-top: 48px; }
  .footer-links { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 420px) {
  .site-logo img { max-width: 108px; }
  .header-download { padding: 0 10px; font-size: 13px; }
  h1 { font-size: 34px; }
  .footer-links { grid-template-columns: 1fr; }
  .hero-badge { font-size: 13px; padding: 12px; }
}