:root {
    --blue: #3f8fe5;
    --blue-dark: #2875c7;
    --blue-soft: #eaf4ff;
    --ink: #1f2d3d;
    --text: #34495e;
    --muted: #6f7f90;
    --line: #d8e4f0;
    --line-soft: #e5edf5;
    --bg-soft: #f4f7fb;
    --bg-alt: #eef3f9;
    --shadow: 0 12px 32px rgba(43,97,153,.10);
    --radius: 16px;
    --max: 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(--blue-dark); }
a:focus-visible, button:focus-visible { outline: 3px solid rgba(63,143,229,.35); outline-offset: 3px; }
img { max-width: 100%; height: auto; }
button { font: inherit; }
.skip-link { position: fixed; left: 16px; top: -60px; z-index: 12000; background: #fff; padding: 10px 14px; border: 1px solid var(--line); 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 var(--line-soft);
    box-shadow: 0 6px 20px rgba(43,97,153,.08);
}
.header-inner {
    max-width: var(--max);
    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; }
.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-dark); background: var(--blue-soft); }
.header-actions { display: flex; align-items: center; gap: 10px; flex: 0 0 auto; }
.main-btn, .secondary-btn, .outline-btn, .text-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    padding: 0 22px;
    border-radius: 9px;
    text-decoration: none;
    position: relative;
    z-index: 2;
    pointer-events: auto;
    touch-action: manipulation;
    transition: .2s ease;
    font-weight: 700;
}
.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-dark); background: var(--blue-soft); }
.secondary-btn:hover { background: #dceeff; transform: translateY(-1px); }
.outline-btn { color: var(--blue-dark); border: 1px solid var(--blue); background: #fff; }
.outline-btn:hover { background: var(--blue-soft); }
.text-button { padding: 0; min-height: 34px; color: var(--blue-dark); }
.menu-button { width: 46px; height: 46px; 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; }
.menu-button span { width: 21px; height: 2px; background: var(--ink); border-radius: 2px; }
.drawer-overlay { position: fixed; inset: 0; z-index: 10000; background: rgba(22,44,70,.48); opacity: 0; transition: opacity .22s ease; }
.drawer-overlay.is-visible { opacity: 1; }
.site-drawer { position: fixed; top: 0; right: 0; z-index: 10001; width: min(390px, 92vw); height: 100vh; background: #fff; transform: translateX(100%); transition: transform .25s ease; box-shadow: -20px 0 40px rgba(31,45,61,.16); overflow-y: auto; }
.site-drawer.is-open { transform: translateX(0); }
.drawer-head { min-height: 74px; padding: 14px 20px; display: flex; align-items: center; justify-content: space-between; border-bottom: 1px solid var(--line-soft); }
.drawer-close { width: 44px; height: 44px; border: 1px solid var(--line); border-radius: 10px; background: #fff; color: var(--ink); font-size: 30px; line-height: 1; cursor: pointer; }
.drawer-nav { padding: 12px 20px 32px; display: grid; gap: 4px; }
.drawer-nav a { min-height: 48px; padding: 10px 12px; display: flex; justify-content: space-between; align-items: center; border-radius: 9px; color: var(--text); text-decoration: none; }
.drawer-nav a:hover { background: var(--bg-soft); color: var(--blue-dark); }
.drawer-nav .drawer-download { margin-top: 10px; justify-content: center; color: #fff; background: var(--blue); }
.container { width: min(var(--max), calc(100% - 40px)); margin: 0 auto; }
.section { padding: 86px 0; }
.section-small { padding: 58px 0; }
.section-light { background: var(--bg-soft); }
.section-alt { background: var(--bg-alt); }
.eyebrow { margin: 0 0 12px; color: var(--blue-dark); font-size: 14px; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }
h1, h2, h3, .section-title { color: var(--ink); line-height: 1.25; }
h1 { margin: 0 0 22px; font-size: clamp(38px, 6vw, 66px); letter-spacing: -.04em; }
h2 { margin: 0 0 18px; font-size: clamp(28px, 4vw, 42px); letter-spacing: -.025em; }
h3 { margin: 0 0 10px; font-size: 21px; }
p { margin: 0 0 18px; }
.lead { font-size: clamp(18px, 2vw, 21px); color: var(--muted); }
.section-head { max-width: 760px; margin-bottom: 38px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.hero { position: relative; overflow: hidden; padding: 84px 0 72px; background: linear-gradient(135deg, #fff 0%, #f7fbff 55%, #eef6ff 100%); }
.hero::before { content: ""; position: absolute; width: 420px; height: 420px; border-radius: 50%; right: -130px; top: -150px; background: rgba(63,143,229,.09); }
.hero-grid { position: relative; display: grid; grid-template-columns: 1.08fr .92fr; align-items: center; gap: 64px; }
.hero-copy { max-width: 680px; }
.hero-copy .subheading { margin: 0 0 18px; color: var(--blue-dark); font-size: clamp(20px, 2.5vw, 28px); font-weight: 800; line-height: 1.4; }
.hero-copy .description { max-width: 660px; color: var(--muted); font-size: 17px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 28px 0 24px; }
.hero-links { display: flex; flex-wrap: wrap; gap: 18px; font-size: 15px; }
.hero-links a { text-decoration: none; }
.hero-points { margin: 28px 0 0; padding: 0; list-style: none; display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 10px 18px; }
.hero-points li { position: relative; padding-left: 25px; color: var(--text); }
.hero-points li::before { content: "✓"; position: absolute; left: 0; color: var(--blue); font-weight: 900; }
.hero-visual { position: relative; display: flex; justify-content: center; }
.hero-visual::before { content: ""; position: absolute; inset: 9% 2% 2%; border-radius: 40px; background: linear-gradient(180deg, rgba(63,143,229,.13), rgba(63,143,229,.04)); }
.hero-visual img { position: relative; width: min(100%, 520px); object-fit: contain; filter: drop-shadow(0 24px 38px rgba(43,97,153,.18)); }
.info-grid { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 22px; }
.info-card, .category-card, .review-card, .faq-card, .content-card, .notice-card, .step-card, .stat-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); box-shadow: 0 8px 24px rgba(43,97,153,.06); }
.info-card { padding: 26px; }
.info-card .number { display: inline-flex; width: 38px; height: 38px; border-radius: 10px; align-items: center; justify-content: center; color: var(--blue-dark); background: var(--blue-soft); font-weight: 900; margin-bottom: 16px; }
.category-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 30px; }
.category-card { padding: 30px; min-height: 208px; display: flex; flex-direction: column; transition: .2s ease; }
.category-card:hover { border-color: var(--blue); transform: translateY(-4px); box-shadow: var(--shadow); }
.category-card:last-child { grid-column: 1 / -1; min-height: 170px; }
.category-card p { color: var(--muted); }
.category-card a { margin-top: auto; text-decoration: none; font-weight: 800; }
.split { display: grid; grid-template-columns: 1fr 1fr; align-items: center; gap: 64px; }
.split.reverse .feature-image { order: 2; }
.feature-image { display: flex; align-items: center; justify-content: center; min-height: 360px; padding: 34px; background: #fff; border: 1px solid var(--line-soft); border-radius: 24px; }
.feature-image img { max-height: 420px; object-fit: contain; display: block; }
.feature-copy ul, .article ul { padding-left: 20px; }
.feature-copy li, .article li { margin-bottom: 8px; }
.button-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 26px; }
.dual-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 30px; }
.content-card { padding: 32px; }
.content-card .feature-image { min-height: 250px; margin-bottom: 26px; padding: 24px; }
.review-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 24px; }
.review-card { padding: 26px; }
.review-card .review-meta { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; }
.avatar { width: 42px; height: 42px; border-radius: 50%; display: grid; place-items: center; color: #fff; background: var(--blue); font-weight: 800; }
.stars { color: var(--blue-dark); letter-spacing: 2px; font-size: 13px; }
.faq-list { display: grid; gap: 14px; }
.faq-item { background: #fff; border: 1px solid var(--line); border-radius: 13px; overflow: hidden; }
.faq-question { width: 100%; min-height: 60px; padding: 16px 20px; border: 0; background: #fff; color: var(--ink); display: flex; justify-content: space-between; align-items: center; text-align: left; font-weight: 800; cursor: pointer; }
.faq-question::after { content: "+"; font-size: 24px; color: var(--blue); }
.faq-item.is-open .faq-question::after { content: "−"; }
.faq-answer { display: none; padding: 0 20px 20px; color: var(--muted); }
.faq-item.is-open .faq-answer { display: block; }
.alert { padding: 24px 26px; border-radius: 14px; border: 1px solid #bcd9f7; background: #f3f9ff; }
.alert strong { color: var(--blue-dark); }
.page-hero { padding: 72px 0 58px; background: linear-gradient(135deg, #fff, #eef6ff); border-bottom: 1px solid var(--line-soft); }
.page-hero .breadcrumbs { margin-bottom: 15px; color: var(--muted); font-size: 14px; }
.page-hero h1 { max-width: 900px; font-size: clamp(36px,5vw,56px); }
.page-hero p { max-width: 820px; color: var(--muted); font-size: 18px; }
.article-wrap { display: grid; grid-template-columns: minmax(0,1fr) 290px; gap: 48px; align-items: start; }
.article { min-width: 0; }
.article section { scroll-margin-top: 96px; margin-bottom: 48px; }
.article h2 { font-size: 31px; }
.article h3 { margin-top: 28px; }
.article p { color: #40566b; }
.article table { width: 100%; border-collapse: collapse; margin: 22px 0; font-size: 15px; }
.article th, .article td { border: 1px solid var(--line); padding: 13px 14px; vertical-align: top; }
.article th { background: var(--bg-soft); color: var(--ink); text-align: left; }
.toc { position: sticky; top: 96px; padding: 24px; background: var(--bg-soft); border: 1px solid var(--line-soft); border-radius: 14px; }
.toc h2 { font-size: 18px; }
.toc a { display: block; padding: 7px 0; text-decoration: none; font-size: 14px; }
.steps { display: grid; gap: 20px; counter-reset: step; }
.step-card { position: relative; padding: 28px 28px 28px 86px; counter-increment: step; }
.step-card::before { content: counter(step); position: absolute; left: 28px; top: 28px; width: 38px; height: 38px; border-radius: 10px; display: grid; place-items: center; color: #fff; background: var(--blue); font-weight: 900; }
.glossary-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 22px; }
.glossary-grid .content-card { padding: 26px; }
.notice-list { display: grid; gap: 18px; }
.notice-card { padding: 24px 26px; }
.notice-card .tag { display: inline-flex; margin-bottom: 10px; padding: 4px 10px; border-radius: 999px; background: var(--blue-soft); color: var(--blue-dark); font-size: 13px; font-weight: 800; }
.notice-card h2 { font-size: 24px; margin-bottom: 8px; }
.notice-card p { color: var(--muted); margin-bottom: 0; }
.contact-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 24px; }
.contact-grid .content-card { min-height: 230px; }
.site-footer { background: #438ddf; color: #fff; }
.footer-inner { width: min(var(--max), calc(100% - 40px)); margin: 0 auto; padding: 68px 0 46px; display: grid; grid-template-columns: 1.05fr 1.95fr; gap: 70px; }
.footer-brand p { max-width: 420px; color: rgba(255,255,255,.88); }
.footer-logo img { filter: brightness(0) invert(1); }
.footer-download { display: inline-flex; min-height: 44px; align-items: center; padding: 0 20px; margin-top: 8px; color: var(--blue-dark); background: #fff; border-radius: 9px; text-decoration: none; font-weight: 800; }
.footer-links { display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); gap: 26px; }
.footer-links h2 { color: #fff; font-size: 16px; margin-bottom: 15px; }
.footer-links a { display: block; color: rgba(255,255,255,.88); text-decoration: none; margin: 8px 0; font-size: 14px; }
.footer-links a:hover { color: #fff; text-decoration: underline; }
.footer-risk { border-top: 1px solid rgba(255,255,255,.2); width: min(var(--max), calc(100% - 40px)); margin: 0 auto; padding: 24px 0; color: rgba(255,255,255,.86); font-size: 14px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.18); padding: 20px; text-align: center; color: rgba(255,255,255,.78); font-size: 13px; }
.maintenance { min-height: 100vh; display: grid; place-items: center; padding: 28px; background: linear-gradient(135deg,#fff,#eef6ff); }
.maintenance-card { width: min(560px,100%); padding: 46px 34px; text-align: center; background: #fff; border: 1px solid var(--line); border-radius: 20px; box-shadow: var(--shadow); }
.maintenance-mark { width: 74px; height: 74px; margin: 0 auto 22px; display: grid; place-items: center; border-radius: 20px; background: var(--blue-soft); color: var(--blue-dark); font-size: 34px; font-weight: 900; }
@media (max-width: 1080px) {
    .nav-core { display: none; }
    .hero-grid, .split { gap: 40px; }
    .info-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
    .review-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
    .article-wrap { grid-template-columns: 1fr; }
    .toc { position: static; order: -1; }
    .footer-inner { grid-template-columns: 1fr; gap: 38px; }
}
@media (max-width: 820px) {
    .section { padding: 68px 0; }
    .hero { padding-top: 54px; }
    .hero-grid, .split { grid-template-columns: 1fr; }
    .hero-copy { max-width: none; }
    .hero-visual { order: 2; }
    .split.reverse .feature-image { order: 0; }
    .category-grid { grid-template-columns: repeat(2,minmax(0,1fr)); gap: 22px; }
    .category-card:last-child { grid-column: 1 / -1; }
    .dual-grid, .glossary-grid { grid-template-columns: 1fr; }
    .footer-links { grid-template-columns: repeat(2,minmax(0,1fr)); }
    .contact-grid { grid-template-columns: 1fr; }
}
@media (max-width: 600px) {
    .header-inner { min-height: 62px; padding: 0 14px; gap: 8px; }
    .site-logo img { max-width: 132px; max-height: 36px; }
    .header-actions { gap: 6px; }
    .header-download { min-height: 44px; padding: 0 13px; font-size: 13px; }
    .menu-button { width: 44px; height: 44px; }
    .container { width: min(100% - 32px, var(--max)); }
    .hero { padding: 45px 0 56px; }
    h1 { font-size: 39px; }
    .hero-copy .description { font-size: 16px; }
    .hero-actions { display: grid; grid-template-columns: 1fr; }
    .hero-actions a { width: 100%; }
    .hero-links { gap: 10px 16px; }
    .hero-points { grid-template-columns: 1fr; }
    .info-grid, .category-grid, .review-grid { grid-template-columns: 1fr; }
    .category-card:last-child { grid-column: auto; }
    .category-card { min-height: 190px; }
    .feature-image { min-height: 260px; padding: 22px; }
    .section-head { margin-bottom: 28px; }
    .step-card { padding: 24px 22px 24px 72px; }
    .step-card::before { left: 20px; top: 24px; }
    .footer-inner, .footer-risk { width: min(100% - 32px, var(--max)); }
    .footer-links { grid-template-columns: 1fr 1fr; gap: 20px; }
    .page-hero { padding: 50px 0 42px; }
    .article h2 { font-size: 27px; }
    .article table { display: block; overflow-x: auto; }
}