:root {
  --primary: #315ff6;
  --primary-dark: #2346c8;
  --secondary: #0fb5a9;
  --accent: #f5a30f;
  --ink: #18243a;
  --text: #4d5b72;
  --muted: #6f7c91;
  --line: #dfe7f3;
  --soft: #f5f8fe;
  --white: #ffffff;
  --shadow: 0 18px 55px rgba(44, 72, 126, .12);
  --radius: 24px;
  --header-height: 78px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--white); font-family: Poppins, "Segoe UI", Arial, sans-serif; line-height: 1.7; -webkit-font-smoothing: antialiased; }
button, input, textarea, select { font-family: Poppins, "Segoe UI", Arial, sans-serif; }
img { display: block; max-width: 100%; height: auto; }
a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-dark); }
button, input { font: inherit; }
button { cursor: pointer; }
:focus-visible { outline: 3px solid rgba(49,95,246,.28); outline-offset: 3px; }
.container { width: min(1140px, calc(100% - 40px)); margin-inline: auto; }
.section { padding: 92px 0; position: relative; }
.section-soft { background: var(--soft); }
.section-kicker { display: inline-flex; align-items: center; gap: 8px; margin: 0 0 10px; color: var(--primary); font-size: .78rem; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
.section-kicker::before { content: ""; width: 26px; height: 3px; border-radius: 99px; background: linear-gradient(90deg,var(--primary),var(--secondary)); }
.section-head { max-width: 770px; margin: 0 auto 42px; text-align: center; }
.section-head h2 { margin: 0 0 14px; font-size: clamp(2rem, 4vw, 2.75rem); line-height: 1.18; letter-spacing: -.035em; }
.section-head p { margin: 0; color: var(--text); }
h1,h2,h3,h4 { line-height: 1.22; }
p { color: var(--text); }
.skip-link { position: fixed; left: 18px; top: -100px; z-index: 9999; padding: 12px 18px; border-radius: 10px; background: var(--ink); color: #fff; }
.skip-link:focus { top: 14px; }
.site-header-wrap { position: sticky; top: 0; z-index: 1000; background: rgba(255,255,255,.94); backdrop-filter: blur(16px); border-bottom: 1px solid transparent; transition: box-shadow .25s, border-color .25s; }
.site-header-wrap.scrolled { box-shadow: 0 12px 34px rgba(35,54,93,.10); border-color: var(--line); }
.nav-shell { min-height: var(--header-height); display: flex; align-items: center; justify-content: space-between; gap: 22px; }
.brand { display: inline-flex; align-items: center; flex: 0 0 auto; }
.brand img { width: 185px; }
.nav-toggle { display: none; border: 1px solid var(--line); background: #fff; width: 46px; height: 46px; border-radius: 13px; align-items: center; justify-content: center; color: var(--ink); }
.nav-toggle span, .nav-toggle::before, .nav-toggle::after { content: ""; display: block; width: 21px; height: 2px; border-radius: 3px; background: currentColor; transition: .25s; position: absolute; }
.nav-toggle::before { transform: translateY(-7px); }
.nav-toggle::after { transform: translateY(7px); }
.nav-toggle[aria-expanded="true"] span { opacity: 0; }
.nav-toggle[aria-expanded="true"]::before { transform: rotate(45deg); }
.nav-toggle[aria-expanded="true"]::after { transform: rotate(-45deg); }
.site-nav { display: flex; align-items: center; gap: 6px; }
.site-nav a { padding: 10px 12px; color: #35435a; font-size: .91rem; font-weight: 650; border-radius: 10px; }
.site-nav a:hover, .site-nav a.active { color: var(--primary); background: #edf2ff; }
.site-nav .nav-download { margin-left: 8px; padding: 12px 18px; color: #fff; background: linear-gradient(135deg,var(--primary),#537cff); box-shadow: 0 10px 24px rgba(49,95,246,.22); }
.site-nav .nav-download:hover { color: #fff; transform: translateY(-1px); }
.hero { padding: 72px 0 80px; overflow: hidden; background: radial-gradient(circle at 12% 15%, #e9efff 0, transparent 34%), radial-gradient(circle at 90% 85%, #e5fbf7 0, transparent 30%), #fff; }
.hero-grid { display: grid; grid-template-columns: 1.02fr .98fr; align-items: center; gap: 58px; }
.hero h1 { margin: 12px 0 22px; font-size: clamp(2.65rem, 6vw, 4.75rem); letter-spacing: -.06em; }
.hero h1 span { color: var(--primary); }
.hero p { margin: 0 0 28px; font-size: 1.08rem; max-width: 650px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 10px; min-height: 50px; padding: 13px 21px; border-radius: 13px; border: 1px solid transparent; font-weight: 750; transition: transform .2s, box-shadow .2s, background .2s; }
.btn:hover { transform: translateY(-2px); }
.btn-primary { color: #fff; background: linear-gradient(135deg,var(--primary),#557eff); box-shadow: 0 13px 30px rgba(49,95,246,.24); }
.btn-primary:hover { color: #fff; }
.btn-secondary { color: var(--ink); background: #fff; border-color: var(--line); }
.btn-secondary:hover { background: var(--soft); color: var(--ink); }
.hero-points { display: flex; flex-wrap: wrap; gap: 9px 14px; margin-top: 26px; }
.hero-points span { display: inline-flex; align-items: center; gap: 8px; color: #40506a; font-size: .9rem; font-weight: 650; }
.hero-points span::before { content: "✓"; display: grid; place-items: center; width: 22px; height: 22px; border-radius: 50%; background: #e4faf6; color: #078b80; font-size: .78rem; }
.visual-card { padding: 14px; border: 1px solid var(--line); border-radius: 30px; background: rgba(255,255,255,.78); box-shadow: var(--shadow); transform: rotate(1.2deg); }
.visual-card img { border-radius: 21px; }
.about-grid { display: grid; grid-template-columns: .95fr 1.05fr; align-items: center; gap: 62px; }
.image-frame { padding: 13px; border-radius: 28px; background: #fff; border: 1px solid var(--line); box-shadow: var(--shadow); }
.image-frame img { border-radius: 19px; }
.content-block h2 { margin: 0 0 16px; font-size: clamp(2rem,4vw,2.7rem); letter-spacing: -.04em; }
.content-block p { margin: 0 0 16px; }
.check-list { display: grid; gap: 11px; margin: 24px 0 0; padding: 0; list-style: none; }
.check-list li { display: flex; gap: 11px; color: var(--text); }
.check-list li::before { content: "✓"; flex: 0 0 25px; height: 25px; display: grid; place-items: center; border-radius: 8px; background: #eaf0ff; color: var(--primary); font-weight: 900; }
.feature-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 18px; }
.feature-card { min-height: 228px; padding: 26px; border-radius: 22px; background: #fff; border: 1px solid var(--line); box-shadow: 0 12px 30px rgba(44,72,126,.07); transition: transform .25s, box-shadow .25s; }
.feature-card:hover { transform: translateY(-5px); box-shadow: var(--shadow); }
.icon-box { width: 48px; height: 48px; display: grid; place-items: center; margin-bottom: 20px; border-radius: 15px; color: #fff; background: linear-gradient(135deg,var(--primary),#6888ff); font-weight: 900; }
.feature-card:nth-child(2n) .icon-box { background: linear-gradient(135deg,var(--secondary),#52d1c8); }
.feature-card h3 { margin: 0 0 10px; font-size: 1.13rem; }
.feature-card p { margin: 0; font-size: .93rem; }
.steps-shell { display: grid; grid-template-columns: repeat(4,1fr); gap: 18px; position: relative; }
.step { padding: 28px 24px; border-radius: 22px; background: #fff; border: 1px solid var(--line); }
.step-number { display: inline-grid; place-items: center; width: 42px; height: 42px; border-radius: 13px; background: var(--ink); color: #fff; font-weight: 850; }
.step h3 { margin: 18px 0 9px; font-size: 1.12rem; }
.step p { margin: 0; font-size: .93rem; }
.info-band { display: grid; grid-template-columns: repeat(4,1fr); gap: 1px; overflow: hidden; border: 1px solid var(--line); border-radius: 22px; background: var(--line); }
.info-band article { padding: 27px; background: #fff; }
.info-band strong { display: block; margin-bottom: 7px; color: var(--ink); font-size: 1rem; }
.info-band span { color: var(--text); font-size: .92rem; }
.use-grid { display: grid; grid-template-columns: 1.2fr .8fr .8fr; gap: 18px; }
.use-card { padding: 28px; border-radius: 24px; border: 1px solid var(--line); background: #fff; min-height: 220px; }
.use-card:first-child { background: linear-gradient(145deg,#315ff6,#2346c8); color: #fff; }
.use-card:first-child p { color: #e8edff; }
.use-card h3 { margin: 0 0 10px; }
.download-panel { display: grid; grid-template-columns: 1fr .82fr; align-items: center; gap: 40px; padding: 42px; border-radius: 30px; background: linear-gradient(135deg,#18243a,#263a60); color: #fff; overflow: hidden; box-shadow: 0 24px 65px rgba(24,36,58,.25); }
.download-panel p { color: #dbe4f7; }
.download-panel .section-kicker { color: #9bb1ff; }
.download-panel .section-kicker::before { background: var(--secondary); }
.download-panel h2 { margin: 8px 0 14px; font-size: clamp(2.1rem,4vw,3rem); }
.download-panel img { border-radius: 22px; border: 1px solid rgba(255,255,255,.15); }
.download-meta { display: flex; flex-wrap: wrap; gap: 10px; margin: 22px 0 26px; }
.download-meta span { padding: 8px 11px; border-radius: 10px; background: rgba(255,255,255,.09); color: #eaf0ff; font-size: .86rem; }
.notice { padding: 26px 28px; border: 1px solid #f1d596; border-left: 5px solid var(--accent); border-radius: 18px; background: #fffaf0; }
.notice h3 { margin: 0 0 8px; }
.notice p { margin: 0; }
.dual-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 20px; }
.procon { padding: 30px; border-radius: 24px; border: 1px solid var(--line); background: #fff; }
.procon h3 { margin-top: 0; }
.procon ul { margin: 0; padding-left: 20px; color: var(--text); }
.procon li + li { margin-top: 10px; }
.release-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 28px; align-items: stretch; }
.release-card, .trouble-card { padding: 30px; border-radius: 24px; border: 1px solid var(--line); background: #fff; }
.release-table { width: 100%; border-collapse: collapse; }
.release-table th, .release-table td { padding: 14px 12px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
.release-table th { width: 34%; color: var(--ink); }
.release-table td { color: var(--text); }
.trouble-list { display: grid; gap: 14px; }
.trouble-item { padding: 20px; border-radius: 17px; background: var(--soft); }
.trouble-item h3 { margin: 0 0 6px; font-size: 1rem; }
.trouble-item p { margin: 0; font-size: .92rem; }
.guide-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 20px; }
.guide-card { overflow: hidden; border: 1px solid var(--line); border-radius: 23px; background: #fff; box-shadow: 0 12px 32px rgba(44,72,126,.07); }
.guide-card img { aspect-ratio: 16/9; object-fit: cover; }
.guide-content { padding: 24px; }
.guide-card h3 { margin: 0 0 10px; font-size: 1.12rem; }
.guide-card p { margin: 0 0 16px; font-size: .92rem; }
.text-link { display: inline-flex; align-items: center; gap: 7px; font-weight: 800; }
.faq-layout { display: grid; grid-template-columns: 230px 1fr; gap: 32px; align-items: start; }
.faq-tabs { position: sticky; top: calc(var(--header-height) + 24px); padding: 12px; border-radius: 20px; background: #fff; border: 1px solid var(--line); box-shadow: 0 10px 28px rgba(44,72,126,.07); }
.faq-tab { width: 100%; text-align: left; padding: 13px 15px; border: 0; border-radius: 12px; background: transparent; color: var(--text); font-weight: 750; }
.faq-tab.active { color: var(--primary); background: #edf2ff; }
.faq-group { display: none; gap: 12px; }
.faq-group.active { display: grid; }
.faq-item h3 { margin: 0; }
.faq-item { border: 1px solid var(--line); border-radius: 18px; background: #fff; overflow: hidden; }
.faq-question { width: 100%; display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 19px 21px; border: 0; background: #fff; color: var(--ink); text-align: left; font-weight: 780; }
.faq-question::after { content: "+"; flex: 0 0 32px; height: 32px; display: grid; place-items: center; border-radius: 10px; color: var(--primary); background: #edf2ff; font-size: 1.2rem; }
.faq-question[aria-expanded="true"]::after { content: "−"; background: var(--primary); color: #fff; }
.faq-answer { display: grid; grid-template-rows: 0fr; transition: grid-template-rows .25s ease; }
.faq-answer > div { overflow: hidden; }
.faq-answer p { margin: 0; padding: 0 21px 20px; }
.faq-question[aria-expanded="true"] + .faq-answer { grid-template-rows: 1fr; }
.page-hero { padding: 76px 0 64px; background: linear-gradient(180deg,#f1f5ff,#fff); text-align: center; }
.page-hero .container { max-width: 850px; }
.page-hero h1 { margin: 8px 0 16px; font-size: clamp(2.45rem,5vw,4rem); letter-spacing: -.05em; }
.breadcrumb { display: flex; justify-content: center; flex-wrap: wrap; gap: 7px; color: var(--muted); font-size: .9rem; }
.breadcrumb a { font-weight: 700; }
.page-content { padding: 76px 0 96px; }
.prose { max-width: 850px; margin: 0 auto; }
.prose h2 { margin: 38px 0 12px; font-size: 1.8rem; }
.prose h3 { margin: 28px 0 8px; font-size: 1.3rem; }
.prose p, .prose li { color: var(--text); }
.prose ul, .prose ol { padding-left: 22px; }
.contact-panels { display: grid; grid-template-columns: repeat(3,1fr); gap: 18px; margin-top: 34px; }
.contact-panel { padding: 28px; border: 1px solid var(--line); border-radius: 22px; background: #fff; }
.contact-panel h2 { margin: 0 0 9px; font-size: 1.2rem; }
.contact-panel p { margin: 0; }
.email-text { font-weight: 800; color: var(--ink); }
.blog-feature { padding: 58px 0; background: linear-gradient(180deg,#f1f5ff,#fff); }
.blog-feature-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center; }
.blog-feature img { border-radius: 26px; border: 1px solid var(--line); box-shadow: var(--shadow); }
.blog-list { padding: 70px 0 96px; }
.blog-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 22px; }
.blog-card { overflow: hidden; border: 1px solid var(--line); border-radius: 24px; background: #fff; box-shadow: 0 12px 34px rgba(44,72,126,.07); }
.blog-card img { width: 100%; aspect-ratio: 16/9; object-fit: cover; }
.blog-card-body { padding: 24px; }
.blog-card h2 { margin: 0 0 10px; font-size: 1.25rem; }
.blog-card p { margin: 0 0 15px; font-size: .93rem; }
.article-shell { display: grid; grid-template-columns: minmax(0,1fr) 300px; gap: 38px; align-items: start; }
.article-main { min-width: 0; }
.article-main .feature-image { width: 100%; border-radius: 25px; border: 1px solid var(--line); margin-bottom: 30px; }
.article-main h2 { margin: 40px 0 12px; font-size: 1.85rem; letter-spacing: -.025em; }
.article-main h3 { margin: 28px 0 8px; }
.article-main p, .article-main li { color: var(--text); }
.article-main ul, .article-main ol { padding-left: 22px; }
.article-sidebar { position: sticky; top: calc(var(--header-height) + 24px); display: grid; gap: 18px; }
.sidebar-card { padding: 22px; border-radius: 20px; border: 1px solid var(--line); background: #fff; }
.sidebar-card h2 { margin: 0 0 13px; font-size: 1.05rem; }
.sidebar-card ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.sidebar-card a { font-weight: 700; font-size: .92rem; }
.article-note { padding: 22px; border-left: 4px solid var(--primary); border-radius: 14px; background: #f0f4ff; }
.related-guides { margin-top: 48px; padding-top: 32px; border-top: 1px solid var(--line); }
.related-guides h2 { margin-top: 0; }
.related-links { display: grid; grid-template-columns: repeat(2,1fr); gap: 14px; }
.related-links a { padding: 17px; border-radius: 14px; border: 1px solid var(--line); font-weight: 760; }
.site-footer { padding: 64px 0 26px; background: #111b2e; color: #fff; }
.footer-grid { display: grid; grid-template-columns: 1.2fr .7fr 1.1fr; gap: 44px; }
.footer-brand > a { display: inline-flex; align-items: center; padding: 10px 14px; border-radius: 14px; background: #fff; box-shadow: 0 10px 28px rgba(0,0,0,.18); }
.footer-brand img { width: 185px; filter: none; }
.footer-brand p, .footer-col p { color: #b8c4da; }
.footer-col h2 { margin: 0 0 15px; font-size: 1rem; color: #fff; }
.footer-links { display: grid; gap: 9px; }
.footer-links a { color: #c9d4e7; text-decoration: none; }
.footer-links a:hover { color: #fff; }
.legal-links { display: grid; grid-template-columns: 1fr; align-items: start; justify-items: start; gap: 9px; }
.footer-bottom { margin-top: 38px; padding-top: 22px; border-top: 1px solid rgba(255,255,255,.12); color: #9fadbf; font-size: .9rem; text-align: center; }
.footer-bottom p { margin: 0; color: #9fadbf; }
.footer-bottom a { color: #dfe7f7; text-decoration: none; }
.footer-disclaimer { margin-top: 8px !important; font-size: .86rem; line-height: 1.55; }
.scroll-top { position: fixed; right: 20px; bottom: 20px; width: 46px; height: 46px; display: grid; place-items: center; border: 0; border-radius: 14px; background: var(--primary); color: #fff; box-shadow: 0 12px 28px rgba(49,95,246,.28); opacity: 0; visibility: hidden; transform: translateY(10px); transition: .25s; z-index: 900; }
.scroll-top.show { opacity: 1; visibility: visible; transform: translateY(0); }
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .55s ease, transform .55s ease; }
.reveal.visible { opacity: 1; transform: none; }
.no-js .reveal { opacity: 1; transform: none; }
@media (max-width: 980px) {
  .nav-toggle { display: inline-flex; position: relative; }
  .site-nav { position: absolute; left: 20px; right: 20px; top: calc(100% + 8px); display: none; align-items: stretch; flex-direction: column; padding: 14px; border-radius: 18px; background: #fff; border: 1px solid var(--line); box-shadow: var(--shadow); }
  .site-nav.open { display: flex; }
  .site-nav a { padding: 12px 14px; }
  .site-nav .nav-download { margin-left: 0; margin-top: 4px; text-align: center; }
  .hero-grid, .about-grid, .download-panel, .release-grid, .blog-feature-grid { grid-template-columns: 1fr; }
  .hero-grid { gap: 38px; }
  .visual-card { max-width: 760px; margin: 0 auto; }
  .feature-grid, .steps-shell { grid-template-columns: repeat(2,1fr); }
  .info-band { grid-template-columns: repeat(2,1fr); }
  .use-grid { grid-template-columns: 1fr 1fr; }
  .use-card:first-child { grid-column: 1/-1; }
  .guide-grid, .blog-grid { grid-template-columns: repeat(2,1fr); }
  .article-shell { grid-template-columns: 1fr; }
  .article-sidebar { position: static; grid-template-columns: repeat(2,1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1/-1; }
}
@media (max-width: 720px) {
  .container { width: min(100% - 28px, 1140px); }
  .section { padding: 72px 0; }
  .hero { padding-top: 52px; }
  .hero h1 { font-size: clamp(2.45rem,13vw,3.5rem); }
  .hero-actions .btn { width: 100%; }
  .feature-grid, .steps-shell, .info-band, .use-grid, .dual-grid, .guide-grid, .blog-grid, .contact-panels, .related-links, .article-sidebar { grid-template-columns: 1fr; }
  .use-card:first-child { grid-column: auto; }
  .download-panel { padding: 28px 22px; }
  .faq-layout { grid-template-columns: 1fr; }
  .faq-tabs { position: static; display: grid; grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-brand { grid-column: auto; }
  .release-table, .release-table tbody, .release-table tr, .release-table th, .release-table td { display: block; width: 100%; }
  .release-table tr { padding: 12px 0; border-bottom: 1px solid var(--line); }
  .release-table th, .release-table td { border: 0; padding: 4px 0; }
}
@media (prefers-reduced-motion: reduce) {
  *,*::before,*::after { scroll-behavior: auto !important; animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
}