:root {
    --blue: #3f8fe5; --blue-dark: #2875c7; --blue-soft: #eaf4ff;
    --ink: #1f2d3d; --text: #34495e; --muted: #6f7f90; --line: #d8e4f0;
    --light: #f4f7fb; --soft: #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; }
a { color: #2f83d8; }
img { max-width: 100%; height: auto; }
button, a { -webkit-tap-highlight-color: transparent; }
:focus-visible { outline: 3px solid rgba(63,143,229,.35); outline-offset: 3px; }
.skip-link { position: fixed; left: 16px; top: -80px; background: #fff; padding: 10px 16px; z-index: 12000; 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 #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: 42px; width: auto; }
.nav-core { display: flex; align-items: center; gap: 8px; 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; font-weight: 700; border: 0; }
.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; color: var(--blue-dark); background: #fff; border: 1px solid var(--line); border-radius: 8px; text-decoration: none; font-weight: 700; }
.secondary-btn:hover { border-color: var(--blue); background: var(--blue-soft); }
.menu-toggle, .drawer-close { width: 44px; height: 44px; 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; color: var(--ink); }
.menu-toggle span { width: 20px; height: 2px; background: var(--ink); border-radius: 2px; }
.drawer-overlay { position: fixed; inset: 0; z-index: 10000; background: rgba(18,39,62,.45); opacity: 0; transition: opacity .22s ease; }
.drawer-overlay.visible { opacity: 1; }
.site-drawer { position: fixed; top: 0; right: 0; width: min(390px, 88vw); height: 100vh; z-index: 10001; background: #fff; padding: 18px 20px 28px; transform: translateX(105%); transition: transform .24s ease; box-shadow: -20px 0 60px rgba(18,39,62,.16); overflow-y: auto; }
.site-drawer.open { transform: translateX(0); }
.drawer-head { display: flex; align-items: center; justify-content: space-between; border-bottom: 1px solid #e5edf5; padding-bottom: 16px; }
.drawer-close { font-size: 28px; line-height: 1; }
.drawer-nav { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; padding: 18px 0; }
.drawer-nav a { color: var(--text); text-decoration: none; padding: 11px 12px; border-radius: 8px; background: var(--light); }
.drawer-nav a:hover { color: var(--blue-dark); background: var(--blue-soft); }
.drawer-download { width: 100%; }
body.drawer-open { overflow: hidden; }
.container { width: min(1160px, calc(100% - 40px)); margin: 0 auto; }
.section { padding: 84px 0; }
.section-light { background: var(--light); }
.section-soft { background: var(--soft); }
.section-head { max-width: 760px; margin-bottom: 34px; }
.eyebrow { color: var(--blue-dark); font-weight: 700; letter-spacing: .08em; font-size: 13px; text-transform: uppercase; }
h1, h2, h3, .section-title { color: var(--ink); line-height: 1.3; }
h1 { font-size: clamp(36px, 5vw, 62px); margin: 14px 0 20px; letter-spacing: -.03em; }
h2 { font-size: clamp(28px, 3.4vw, 42px); margin: 0 0 16px; }
h3 { font-size: 21px; margin: 0 0 10px; }
p { margin: 0 0 18px; }
.lead { font-size: 18px; color: var(--muted); max-width: 760px; }
.text-link { color: #2f83d8; font-weight: 700; text-decoration: none; }
.text-link:hover { text-decoration: underline; }
.hero { position: relative; overflow: hidden; padding: 78px 0 64px; background: radial-gradient(circle at 82% 22%, #eaf4ff 0, #eaf4ff 16%, transparent 44%), #fff; }
.hero::before { content: ""; position: absolute; left: -110px; bottom: -180px; width: 420px; height: 420px; border-radius: 50%; background: #f4f7fb; }
.hero-grid { position: relative; display: grid; grid-template-columns: 1.04fr .96fr; align-items: center; gap: 56px; }
.hero-copy { position: relative; z-index: 1; }
.hero-copy .subtitle { font-size: clamp(20px, 2.6vw, 29px); color: var(--blue-dark); font-weight: 700; margin-bottom: 18px; }
.hero-actions, .page-actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 28px 0 22px; }
.hero-links { display: flex; flex-wrap: wrap; gap: 18px; font-size: 14px; }
.hero-points { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 26px; }
.hero-points span { padding: 11px 14px; border: 1px solid var(--line); border-radius: 8px; background: rgba(255,255,255,.8); color: var(--text); font-size: 14px; }
.hero-visual { display: flex; justify-content: center; position: relative; }
.hero-visual::after { content: ""; position: absolute; width: 340px; height: 340px; border: 1px solid rgba(63,143,229,.22); border-radius: 50%; z-index: 0; top: 50%; left: 50%; transform: translate(-50%,-50%); }
.hero-visual img { max-width: 100%; width: 510px; height: auto; object-fit: contain; display: block; position: relative; z-index: 1; filter: drop-shadow(0 26px 34px rgba(43,97,153,.16)); }
.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, .content-card, .notice-card, .step-card { background: #fff; border: 1px solid var(--line); border-radius: 8px; box-shadow: 0 8px 24px rgba(43,97,153,.06); }
.info-card { padding: 25px; }
.info-card .number { color: var(--blue); font-weight: 700; font-size: 13px; }
.category-card { padding: 28px; display: flex; flex-direction: column; min-height: 210px; transition: transform .2s ease, border-color .2s ease; }
.category-card:hover { transform: translateY(-4px); border-color: var(--blue); }
.category-card p { color: var(--muted); flex: 1; }
.category-card.wide { grid-column: 1 / -1; min-height: 170px; }
.split { display: grid; grid-template-columns: 1fr 1fr; align-items: center; gap: 64px; }
.split.reverse .feature-image { order: 2; }
.feature-image { display: flex; justify-content: center; }
.feature-image img, .content-img { max-width: 100%; width: 500px; height: auto; object-fit: contain; display: block; }
.prose { color: var(--text); }
.prose strong { color: var(--ink); }
.check-list { list-style: none; padding: 0; margin: 22px 0; display: grid; gap: 10px; }
.check-list li { position: relative; padding-left: 28px; }
.check-list li::before { content: "✓"; position: absolute; left: 0; top: 0; color: var(--blue-dark); font-weight: 700; }
.dual-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
.content-card { padding: 30px; }
.content-card img { width: 100%; max-height: 260px; object-fit: contain; margin-bottom: 22px; }
.review-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.review-card { padding: 24px; }
.review-card .review-meta { color: var(--blue-dark); font-size: 14px; font-weight: 700; }
.faq-list { display: grid; gap: 14px; }
.faq-card { padding: 0; overflow: hidden; }
.faq-card details { padding: 0 22px; }
.faq-card summary { cursor: pointer; list-style: none; padding: 19px 36px 19px 0; font-weight: 700; color: var(--ink); position: relative; }
.faq-card summary::-webkit-details-marker { display: none; }
.faq-card summary::after { content: "+"; position: absolute; right: 0; top: 17px; color: var(--blue); font-size: 24px; }
.faq-card details[open] summary::after { content: "−"; }
.faq-card .answer { padding-bottom: 20px; color: var(--muted); }
.risk-box { border: 1px solid #b8d5f2; background: #f2f8ff; border-radius: 10px; padding: 24px; }
.risk-box h3 { color: var(--blue-dark); }
.page-hero { padding: 68px 0 54px; background: linear-gradient(180deg, #f4f9ff 0%, #fff 100%); border-bottom: 1px solid #e5edf5; }
.page-hero h1 { font-size: clamp(34px, 4.8vw, 56px); }
.breadcrumb { font-size: 14px; color: var(--muted); margin-bottom: 15px; }
.breadcrumb a { text-decoration: none; }
.article-layout { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 52px; align-items: start; }
.article { min-width: 0; }
.article h2 { font-size: 30px; margin-top: 44px; }
.article h2:first-child { margin-top: 0; }
.article h3 { margin-top: 28px; }
.article p, .article li { font-size: 16px; }
.article ul, .article ol { padding-left: 22px; }
.article-note { padding: 20px 22px; border-left: 4px solid var(--blue); background: var(--blue-soft); margin: 26px 0; }
.side-nav { position: sticky; top: 100px; border: 1px solid var(--line); border-radius: 8px; background: #fff; padding: 22px; }
.side-nav h2 { font-size: 18px; }
.side-nav a { display: block; color: var(--text); text-decoration: none; padding: 7px 0; border-bottom: 1px solid #edf2f7; font-size: 14px; }
.side-nav a:last-child { border-bottom: 0; }
.side-nav a:hover { color: var(--blue-dark); }
.steps-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.step-card { padding: 25px; }
.step-card .step-no { display: inline-flex; width: 34px; height: 34px; align-items: center; justify-content: center; border-radius: 50%; background: var(--blue-soft); color: var(--blue-dark); font-weight: 700; margin-bottom: 14px; }
.notice-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.notice-card { padding: 25px; }
.notice-tag { display: inline-flex; padding: 4px 10px; border-radius: 99px; background: var(--blue-soft); color: var(--blue-dark); font-size: 13px; font-weight: 700; margin-bottom: 12px; }
.notice-card time { display: block; color: var(--muted); font-size: 13px; margin-top: 12px; }
.service-table { width: 100%; border-collapse: collapse; margin: 24px 0; }
.service-table th, .service-table td { border: 1px solid var(--line); padding: 14px 16px; text-align: left; vertical-align: top; }
.service-table th { background: var(--light); color: var(--ink); }
.site-footer { background: #438ddf; color: #fff; }
.footer-inner { width: min(1160px, calc(100% - 40px)); margin: 0 auto; display: grid; grid-template-columns: 1.1fr 1.9fr; gap: 70px; padding: 58px 0 38px; }
.footer-brand img { max-height: 44px; width: auto; filter: brightness(0) invert(1); margin-bottom: 18px; }
.footer-brand p { color: rgba(255,255,255,.86); max-width: 430px; }
.footer-download { color: #fff; font-weight: 700; }
.footer-links { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
.footer-links h2 { color: #fff; font-size: 17px; margin-bottom: 14px; }
.footer-links a { display: block; color: rgba(255,255,255,.86); text-decoration: none; margin: 8px 0; }
.footer-links a:hover { color: #fff; text-decoration: underline; }
.footer-risk { border-top: 1px solid rgba(255,255,255,.22); border-bottom: 1px solid rgba(255,255,255,.22); padding: 18px max(20px, calc((100% - 1160px)/2)); color: rgba(255,255,255,.86); font-size: 14px; }
.footer-bottom { width: min(1160px, calc(100% - 40px)); margin: 0 auto; padding: 18px 0 24px; font-size: 14px; color: rgba(255,255,255,.78); }
@media (max-width: 1020px) {
    .nav-core { display: none; }
    .info-grid { grid-template-columns: 1fr 1fr; }
    .category-grid { grid-template-columns: 1fr 1fr; }
    .category-card.wide { grid-column: 1 / -1; }
    .review-grid { grid-template-columns: 1fr 1fr; }
    .article-layout { grid-template-columns: 1fr; }
    .side-nav { position: static; order: -1; }
}
@media (max-width: 768px) {
    .header-inner { min-height: 62px; padding: 0 14px; gap: 8px; }
    .site-logo img { max-height: 34px; max-width: 132px; }
    .header-download { min-height: 44px; padding: 0 14px; font-size: 14px; }
    .menu-toggle { width: 44px; height: 44px; }
    .container { width: min(100% - 32px, 1160px); }
    .section { padding: 62px 0; }
    .hero { padding: 54px 0 46px; }
    .hero-grid, .split { grid-template-columns: 1fr; gap: 34px; }
    .hero-copy { text-align: left; }
    .hero-actions { flex-direction: column; align-items: stretch; }
    .hero-actions a { width: 100%; }
    .hero-visual { margin-top: 12px; }
    .hero-visual img { width: 430px; }
    .split.reverse .feature-image { order: 0; }
    .info-grid, .category-grid, .dual-grid, .review-grid, .steps-grid, .notice-grid { grid-template-columns: 1fr; }
    .category-card.wide { grid-column: auto; min-height: 210px; }
    .footer-inner { grid-template-columns: 1fr; gap: 36px; }
    .footer-links { grid-template-columns: 1fr 1fr; }
    .page-hero { padding: 50px 0 38px; }
    .side-nav { display: none; }
    .drawer-nav { grid-template-columns: 1fr; }
    .service-table { display: block; overflow-x: auto; }
}
@media (max-width: 460px) {
    .header-download { padding: 0 11px; }
    .site-logo img { max-width: 112px; }
    .hero-points { grid-template-columns: 1fr; }
    .info-grid { grid-template-columns: 1fr; }
    .footer-links { grid-template-columns: 1fr; }
    h1 { font-size: 36px; }
}