:root {
    --brand: #3f8fe5;
    --brand-dark: #2875c7;
    --brand-soft: #eaf4ff;
    --page: #ffffff;
    --soft: #f4f7fb;
    --soft-2: #eef3f9;
    --title: #1f2d3d;
    --text: #34495e;
    --muted: #6f7f90;
    --note: #8c99a8;
    --line: #d8e4f0;
    --divider: #e5edf5;
    --shadow: 0 12px 32px rgba(43,97,153,0.10);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    background: var(--page);
    color: var(--text);
    font-family: Arial, "Microsoft YaHei", sans-serif;
    line-height: 1.7;
    overflow-x: hidden;
}
body.nav-open { overflow: hidden; }
a { color: #2f83d8; }
img { max-width: 100%; }
button, a { -webkit-tap-highlight-color: transparent; }
button:focus-visible, a:focus-visible { outline: 3px solid rgba(63,143,229,.38); outline-offset: 3px; }
.skip-link { position: fixed; left: 12px; top: -60px; background: var(--title); color: #fff; padding: 10px 14px; z-index: 12000; text-decoration: none; border-radius: 6px; }
.skip-link:focus { top: 12px; }
.site-header {
    position: sticky;
    top: 0;
    width: 100%;
    z-index: 9999;
    background: rgba(255,255,255,0.94);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--divider);
    box-shadow: 0 6px 20px rgba(43,97,153,0.08);
}
.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; min-width: 0; }
.nav-core a { color: var(--text); text-decoration: none; padding: 8px 9px; border-radius: 8px; font-size: 15px; white-space: nowrap; }
.nav-core a:hover, .nav-core a.active { color: var(--brand-dark); background: var(--brand-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: 8px;
    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(--brand); box-shadow: 0 10px 24px rgba(63,143,229,0.22); }
.main-btn:hover { color: #fff; background: #2f7fd3; transform: translateY(-1px); }
.main-btn:active { transform: translateY(0); }
.secondary-btn { color: var(--brand-dark); background: #fff; border: 1px solid #9bc5ef; }
.secondary-btn:hover { background: var(--brand-soft); border-color: var(--brand); transform: translateY(-1px); }
.menu-button { width: 46px; height: 46px; border: 1px solid var(--line); border-radius: 8px; background: #fff; display: inline-flex; flex-direction: column; align-items: center; justify-content: center; gap: 5px; cursor: pointer; }
.menu-button span { width: 20px; height: 2px; background: var(--title); border-radius: 2px; }
.drawer-overlay { position: fixed; inset: 0; background: rgba(31,45,61,.42); z-index: 10000; opacity: 0; transition: opacity .22s ease; }
.drawer-overlay.show { opacity: 1; }
.site-drawer { position: fixed; top: 0; right: 0; bottom: 0; width: min(390px, 88vw); background: #fff; z-index: 10001; transform: translateX(104%); transition: transform .24s ease; box-shadow: -18px 0 40px rgba(31,45,61,.18); padding: 20px; overflow-y: auto; }
.site-drawer.open { transform: translateX(0); }
.drawer-head { display: flex; align-items: center; justify-content: space-between; padding-bottom: 16px; border-bottom: 1px solid var(--divider); }
.drawer-close { width: 44px; height: 44px; border: 1px solid var(--line); border-radius: 8px; background: #fff; font-size: 30px; line-height: 1; cursor: pointer; color: var(--title); }
.drawer-nav { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; padding: 20px 0; }
.drawer-nav a { text-decoration: none; color: var(--text); padding: 10px 12px; border-radius: 8px; background: var(--soft); border: 1px solid transparent; }
.drawer-nav a:hover { color: var(--brand-dark); border-color: #b9d5ee; background: var(--brand-soft); }
.drawer-download { width: 100%; }
.container { width: min(1160px, calc(100% - 40px)); margin: 0 auto; }
.narrow { width: min(900px, calc(100% - 40px)); margin: 0 auto; }
section { padding: 82px 0; }
.section-light { background: var(--soft); }
.section-soft { background: var(--soft-2); }
h1, h2, h3, .section-title { color: var(--title); line-height: 1.25; margin-top: 0; }
h1 { font-size: clamp(38px, 5vw, 62px); letter-spacing: -1px; margin-bottom: 20px; }
h2 { font-size: clamp(27px, 3vw, 38px); margin-bottom: 18px; }
h3 { font-size: 20px; margin-bottom: 10px; }
p { margin: 0 0 16px; }
.lead { color: var(--muted); font-size: 18px; max-width: 760px; }
.eyebrow { display: inline-flex; align-items: center; min-height: 30px; padding: 0 12px; background: var(--brand-soft); color: var(--brand-dark); border-radius: 999px; font-size: 14px; font-weight: 700; margin-bottom: 16px; }
.section-head { max-width: 780px; margin-bottom: 34px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.hero { position: relative; overflow: hidden; padding: 72px 0 64px; }
.hero::before { content: ""; position: absolute; width: 520px; height: 520px; border-radius: 50%; right: -170px; top: -220px; background: radial-gradient(circle, rgba(63,143,229,.18), rgba(63,143,229,0) 68%); pointer-events: none; }
.hero::after { content: ""; position: absolute; width: 260px; height: 260px; border: 1px solid rgba(63,143,229,.16); border-radius: 46px; left: -120px; bottom: -140px; transform: rotate(24deg); pointer-events: none; }
.hero-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 54px; align-items: center; position: relative; z-index: 1; }
.hero-copy p { max-width: 680px; }
.hero-subtitle { font-size: clamp(21px, 2.6vw, 30px); color: var(--brand-dark); font-weight: 700; margin-bottom: 18px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 28px 0 18px; }
.hero-links { display: flex; flex-wrap: wrap; gap: 18px; font-size: 15px; }
.hero-links a { text-decoration: none; }
.hero-points { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 24px; padding: 0; list-style: none; }
.hero-points li { padding: 7px 11px; border: 1px solid var(--line); border-radius: 999px; background: #fff; color: var(--muted); font-size: 14px; }
.hero-visual { position: relative; display: flex; justify-content: center; }
.hero-visual img { width: min(100%, 520px); height: auto; object-fit: contain; display: block; filter: drop-shadow(0 24px 38px rgba(43,97,153,.18)); }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 30px; }
.info-card, .category-card, .review-card, .faq-card, .content-card, .notice-card { background: #fff; border: 1px solid var(--line); border-radius: 8px; box-shadow: 0 8px 24px rgba(43,97,153,0.06); }
.info-card { padding: 24px; }
.info-card p { color: var(--muted); margin-bottom: 0; }
.category-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.category-card { padding: 28px; min-height: 210px; display: flex; flex-direction: column; align-items: flex-start; transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease; }
.category-card:hover { transform: translateY(-4px); border-color: var(--brand); box-shadow: var(--shadow); }
.category-card h3 { color: var(--brand-dark); }
.category-card p { color: var(--muted); flex: 1; }
.category-card .text-link { text-decoration: none; font-weight: 700; }
.category-card.wide { grid-column: 1 / -1; min-height: 170px; }
.feature-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 58px; align-items: center; }
.feature-grid.reverse { grid-template-columns: 1.1fr .9fr; }
.feature-image img, .content-img { width: 100%; max-height: 460px; height: auto; object-fit: contain; display: block; }
.feature-copy .lead { margin-bottom: 20px; }
.check-list, .plain-list { margin: 20px 0 28px; padding: 0; list-style: none; display: grid; gap: 10px; }
.check-list li, .plain-list li { position: relative; padding-left: 28px; }
.check-list li::before { content: "✓"; position: absolute; left: 0; top: 0; color: var(--brand-dark); font-weight: 700; }
.plain-list li::before { content: "•"; position: absolute; left: 8px; color: var(--brand); }
.split-card { padding: 30px; }
.split-card .feature-image { margin-bottom: 22px; }
.inline-note { padding: 18px 20px; background: var(--brand-soft); border-left: 4px solid var(--brand); border-radius: 6px; color: #315c83; }
.notice-list { display: grid; gap: 14px; }
.notice-card { padding: 20px 22px; display: grid; grid-template-columns: 120px 1fr; gap: 18px; align-items: start; }
.notice-tag { color: var(--brand-dark); font-weight: 700; }
.notice-card h3 { font-size: 18px; margin: 0 0 5px; }
.notice-card p { color: var(--muted); margin: 0; }
.review-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.review-card { padding: 24px; }
.review-card p { margin-bottom: 16px; color: var(--text); }
.review-card strong { color: var(--brand-dark); }
.faq-list { display: grid; gap: 14px; }
.faq-card { padding: 22px 24px; }
.faq-card h3 { font-size: 18px; }
.faq-card p { color: var(--muted); margin-bottom: 0; }
.risk-band { background: #1f6fbd; color: #fff; }
.risk-band h2, .risk-band p { color: #fff; }
.risk-grid { display: grid; grid-template-columns: 1.25fr .75fr; gap: 36px; align-items: center; }
.page-hero { padding: 62px 0 46px; background: linear-gradient(180deg, #f7fbff 0%, #fff 100%); border-bottom: 1px solid var(--divider); }
.page-hero h1 { font-size: clamp(34px, 4.2vw, 52px); }
.breadcrumb { font-size: 14px; color: var(--muted); margin-bottom: 18px; }
.breadcrumb a { text-decoration: none; }
.article-layout { display: grid; grid-template-columns: minmax(0, 1fr) 280px; gap: 42px; align-items: start; }
.article { min-width: 0; }
.article section { padding: 0 0 36px; }
.article h2 { font-size: 28px; margin-bottom: 14px; }
.article h3 { margin-top: 24px; }
.article p, .article li { font-size: 16px; }
.article ul, .article ol { padding-left: 24px; }
.article-callout { margin: 26px 0 34px; padding: 20px 22px; border: 1px solid #bdd8f0; background: var(--brand-soft); border-radius: 8px; }
.side-card { position: sticky; top: 96px; padding: 22px; background: var(--soft); border: 1px solid var(--line); border-radius: 8px; }
.side-card h2 { font-size: 20px; }
.side-card a { display: block; text-decoration: none; padding: 8px 0; border-bottom: 1px solid var(--divider); }
.side-card a:last-child { border-bottom: 0; }
.qa-item { padding: 24px 0; border-bottom: 1px solid var(--divider); }
.qa-item:last-child { border-bottom: 0; }
.qa-item h2 { font-size: 22px; }
.contact-options { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.contact-options .content-card { padding: 24px; }
.site-footer { background: #438ddf; color: #fff; }
.footer-inner { width: min(1160px, calc(100% - 40px)); margin: 0 auto; padding: 58px 0 38px; display: grid; grid-template-columns: 1fr 1.6fr; gap: 56px; }
.footer-logo img { max-height: 46px; width: auto; filter: brightness(0) invert(1); }
.footer-brand p { color: rgba(255,255,255,.88); max-width: 420px; margin-top: 18px; }
.footer-links { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.footer-links h2 { color: #fff; font-size: 17px; margin-bottom: 12px; }
.footer-links a { display: block; color: rgba(255,255,255,.9); text-decoration: none; padding: 4px 0; }
.footer-links a:hover { color: #fff; text-decoration: underline; }
.footer-risk { width: min(1160px, calc(100% - 40px)); margin: 0 auto; padding: 20px 0; border-top: 1px solid rgba(255,255,255,.22); color: rgba(255,255,255,.9); font-size: 14px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.18); padding: 18px 20px; text-align: center; color: rgba(255,255,255,.82); font-size: 14px; }
@media (max-width: 1040px) {
    .nav-core { display: none; }
    .grid-4 { grid-template-columns: repeat(2, 1fr); }
    .review-grid { grid-template-columns: repeat(2, 1fr); }
    .article-layout { grid-template-columns: 1fr; }
    .side-card { position: static; }
}
@media (max-width: 820px) {
    section { padding: 64px 0; }
    .hero-grid, .feature-grid, .feature-grid.reverse, .risk-grid { grid-template-columns: 1fr; }
    .hero-copy { order: 1; }
    .hero-visual { order: 2; }
    .hero-visual img { width: min(90%, 430px); }
    .category-grid { grid-template-columns: repeat(2, 1fr); gap: 22px; }
    .category-card.wide { grid-column: 1 / -1; }
    .grid-3, .contact-options { grid-template-columns: 1fr; }
    .footer-inner { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
    .header-inner { min-height: 62px; padding: 0 14px; gap: 8px; }
    .site-logo img { max-height: 36px; max-width: 122px; }
    .header-actions { gap: 7px; }
    .header-download { min-height: 44px; padding: 0 13px; font-size: 14px; }
    .menu-button { width: 44px; height: 44px; }
    .container, .narrow { width: min(100% - 32px, 1160px); }
    .hero { padding: 48px 0 52px; }
    h1 { font-size: 38px; }
    .hero-subtitle { font-size: 22px; }
    .hero-actions { align-items: stretch; }
    .hero-actions .main-btn, .hero-actions .secondary-btn { width: 100%; }
    .hero-links { gap: 10px 16px; }
    .grid-4, .grid-2, .category-grid, .review-grid { grid-template-columns: 1fr; }
    .category-card.wide { grid-column: auto; }
    .notice-card { grid-template-columns: 1fr; gap: 4px; }
    .drawer-nav { grid-template-columns: 1fr; }
    .article h2 { font-size: 25px; }
    .footer-links { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 390px) {
    .header-download { padding: 0 10px; }
    .site-logo img { max-width: 105px; }
}
.maintenance-page { min-height: 78vh; display: flex; align-items: center; }
.maintenance-card { text-align: center; }
.maintenance-card .lead { margin-left: auto; margin-right: auto; }
.maintenance-actions { margin-top: 28px; }