:root {
    --blue: #3f8fe5;
    --blue-dark: #2875c7;
    --blue-hover: #2f7fd3;
    --blue-soft: #eaf4ff;
    --bg-soft: #f4f7fb;
    --bg-alt: #eef3f9;
    --text: #34495e;
    --text-dark: #1f2d3d;
    --muted: #6f7f90;
    --border: #d8e4f0;
    --line: #e5edf5;
    --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;
    -webkit-font-smoothing: antialiased;
}
body.drawer-open { overflow: hidden; }
a { color: var(--blue-dark); }
img { max-width: 100%; height: auto; }
button, a { -webkit-tap-highlight-color: transparent; }
button:focus-visible, a:focus-visible { outline: 3px solid rgba(63,143,229,.35); outline-offset: 3px; }
.skip-link { position: fixed; left: 12px; top: -70px; z-index: 12000; padding: 10px 16px; background: #fff; 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 var(--line);
    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: 44px; width: auto; }
.nav-core { display: flex; align-items: center; justify-content: center; gap: 6px; flex: 1; }
.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, .text-btn {
    display: inline-flex; align-items: center; justify-content: center; min-height: 44px; padding: 0 22px; border-radius: 9px; text-decoration: none; font-weight: 700; line-height: 1.25; position: relative; z-index: 2; pointer-events: auto; touch-action: manipulation; transition: .2s ease;
}
.main-btn { color: #fff; background: var(--blue); box-shadow: 0 10px 24px rgba(63,143,229,.22); }
.main-btn:hover { color: #fff; background: var(--blue-hover); transform: translateY(-1px); }
.secondary-btn { color: var(--blue-dark); background: #fff; border: 1px solid var(--border); }
.secondary-btn:hover { border-color: var(--blue); background: var(--blue-soft); }
.text-btn { min-height: 40px; padding: 0; color: var(--blue-dark); }
.menu-button { width: 46px; height: 46px; border: 1px solid var(--border); border-radius: 9px; background: #fff; display: inline-flex; flex-direction: column; align-items: center; justify-content: center; gap: 5px; cursor: pointer; position: relative; z-index: 3; }
.menu-button span { width: 20px; height: 2px; background: var(--text-dark); border-radius: 2px; }
.drawer-overlay { position: fixed; inset: 0; z-index: 10000; background: rgba(22,39,57,.42); 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, 90vw); height: 100dvh; padding: 20px; background: #fff; box-shadow: -18px 0 40px rgba(16,49,80,.18); 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: 18px; border-bottom: 1px solid var(--line); }
.drawer-close { width: 44px; height: 44px; border: 0; border-radius: 9px; background: var(--bg-soft); color: var(--text-dark); font-size: 30px; line-height: 1; cursor: pointer; }
.drawer-nav { display: grid; gap: 4px; padding: 18px 0; }
.drawer-nav a { display: block; padding: 11px 13px; color: var(--text); text-decoration: none; border-radius: 8px; }
.drawer-nav a:hover, .drawer-nav a.active { color: var(--blue-dark); background: var(--blue-soft); }
.drawer-download { width: 100%; }
.container { width: min(1160px, calc(100% - 40px)); margin: 0 auto; }
.narrow { width: min(860px, calc(100% - 40px)); margin: 0 auto; }
.section { padding: 82px 0; }
.section-sm { padding: 56px 0; }
.section-light { background: var(--bg-soft); }
.section-alt { background: var(--bg-alt); }
.section-head { max-width: 760px; margin: 0 auto 36px; text-align: center; }
.eyebrow { display: inline-flex; align-items: center; min-height: 30px; padding: 4px 12px; margin-bottom: 12px; color: var(--blue-dark); background: var(--blue-soft); border-radius: 999px; font-size: 14px; font-weight: 700; letter-spacing: .03em; }
h1, h2, h3, .section-title { color: var(--text-dark); line-height: 1.28; }
h1 { margin: 0 0 18px; font-size: clamp(38px, 6vw, 64px); letter-spacing: -.03em; }
h2 { margin: 0 0 16px; font-size: clamp(28px, 4vw, 42px); letter-spacing: -.02em; }
h3 { margin: 0 0 10px; font-size: 21px; }
p { margin: 0 0 16px; }
.lead { color: var(--muted); font-size: 18px; }
.hero { position: relative; overflow: hidden; padding: 74px 0 84px; background: linear-gradient(135deg,#fff 0%,#fff 60%,#f1f7ff 100%); }
.hero::before { content: ""; position: absolute; width: 460px; height: 460px; right: -130px; top: -170px; border-radius: 50%; background: rgba(63,143,229,.09); }
.hero-grid { position: relative; z-index: 1; display: grid; grid-template-columns: minmax(0,1.05fr) minmax(360px,.95fr); align-items: center; gap: 64px; }
.hero-copy .lead { max-width: 720px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 28px 0 22px; }
.hero-links { display: flex; flex-wrap: wrap; gap: 20px; margin-bottom: 24px; }
.hero-links a { text-decoration: none; font-weight: 700; }
.hero-points { display: flex; flex-wrap: wrap; gap: 10px; padding: 0; margin: 0; list-style: none; }
.hero-points li { padding: 7px 12px; border: 1px solid var(--border); border-radius: 999px; background: rgba(255,255,255,.8); color: var(--muted); font-size: 14px; }
.hero-visual { display: flex; justify-content: center; align-items: center; min-height: 490px; }
.hero-visual img { width: min(100%, 500px); max-height: 570px; object-fit: contain; display: block; filter: drop-shadow(0 26px 40px rgba(43,97,153,.17)); }
.info-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 20px; margin-top: -26px; position: relative; z-index: 2; }
.info-card, .category-card, .review-card, .faq-card, .content-card { background: #fff; border: 1px solid var(--border); border-radius: 10px; box-shadow: 0 8px 24px rgba(43,97,153,.06); }
.info-card { padding: 24px; }
.info-card strong { display: block; color: var(--blue-dark); font-size: 18px; margin-bottom: 7px; }
.info-card p { margin: 0; color: var(--muted); font-size: 15px; }
.category-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 30px; }
.category-card { min-height: 194px; padding: 28px; display: flex; flex-direction: column; transition: .2s ease; }
.category-card:hover { border-color: var(--blue); transform: translateY(-4px); box-shadow: var(--shadow); }
.category-card h3 { color: var(--blue-dark); }
.category-card p { color: var(--muted); flex: 1; }
.category-card a { align-self: flex-start; font-weight: 700; text-decoration: none; }
.category-card.wide { grid-column: 1 / -1; min-height: auto; }
.split { display: grid; grid-template-columns: 1fr 1fr; align-items: center; gap: 62px; }
.split.reverse .feature-image { order: 2; }
.feature-image { min-height: 360px; display: flex; align-items: center; justify-content: center; }
.feature-image img, .content-img { max-width: 100%; height: auto; object-fit: contain; display: block; }
.feature-image img { width: min(100%, 470px); max-height: 410px; }
.content-copy .main-btn, .content-copy .secondary-btn { margin-top: 8px; }
.two-card-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 28px; }
.content-card { padding: 32px; }
.content-card img { width: 100%; max-height: 260px; object-fit: contain; margin-bottom: 18px; }
.review-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 20px; }
.review-card { padding: 24px; }
.review-card p { margin: 0; }
.review-card .review-label { display: block; color: var(--blue-dark); font-weight: 700; margin-bottom: 8px; }
.faq-list { display: grid; gap: 14px; }
details.faq-card { padding: 0; overflow: hidden; }
details.faq-card summary { cursor: pointer; padding: 20px 24px; color: var(--text-dark); font-weight: 700; list-style: none; }
details.faq-card summary::-webkit-details-marker { display: none; }
details.faq-card summary::after { content: "+"; float: right; color: var(--blue); font-size: 23px; }
details.faq-card[open] summary::after { content: "−"; }
details.faq-card p { padding: 0 24px 22px; color: var(--muted); }
.alert { padding: 24px 26px; border-left: 4px solid var(--blue); background: var(--blue-soft); border-radius: 8px; }
.alert strong { color: var(--text-dark); }
.page-hero { padding: 68px 0 56px; background: linear-gradient(180deg,#f7fbff 0%,#fff 100%); border-bottom: 1px solid var(--line); }
.page-hero .narrow { text-align: center; }
.page-hero h1 { font-size: clamp(36px,5vw,54px); }
.page-hero p { max-width: 780px; margin: 0 auto; color: var(--muted); font-size: 18px; }
.article { padding: 68px 0 84px; }
.article h2 { margin-top: 46px; font-size: 30px; }
.article h3 { margin-top: 30px; }
.article p, .article li { font-size: 17px; }
.article ul, .article ol { padding-left: 1.35em; }
.article li { margin-bottom: 9px; }
.article .content-card { margin: 28px 0; }
.steps { counter-reset: step; display: grid; gap: 16px; margin: 28px 0; }
.step { position: relative; padding: 22px 24px 22px 72px; border: 1px solid var(--border); border-radius: 10px; background: #fff; }
.step::before { counter-increment: step; content: counter(step); position: absolute; left: 22px; top: 21px; width: 32px; height: 32px; display: grid; place-items: center; border-radius: 50%; color: #fff; background: var(--blue); font-weight: 700; }
.data-table { width: 100%; border-collapse: collapse; margin: 24px 0; overflow: hidden; border-radius: 9px; }
.data-table th, .data-table td { padding: 14px 16px; border: 1px solid var(--border); text-align: left; vertical-align: top; }
.data-table th { background: var(--bg-soft); color: var(--text-dark); }
.news-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 22px; }
.news-card { padding: 26px; border: 1px solid var(--border); border-radius: 10px; background: #fff; }
.news-tag { display: inline-flex; padding: 4px 10px; margin-bottom: 12px; border-radius: 999px; background: var(--blue-soft); color: var(--blue-dark); font-size: 13px; font-weight: 700; }
.cta { text-align: center; padding: 44px; border: 1px solid var(--border); border-radius: 14px; background: linear-gradient(135deg,#f7fbff,#eef6ff); }
.cta p { max-width: 680px; margin: 0 auto 22px; color: var(--muted); }
.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: 1.15fr 1.85fr; gap: 64px; }
.footer-logo { background: #fff; padding: 8px 12px; border-radius: 8px; margin-bottom: 18px; }
.footer-brand p { max-width: 420px; margin: 0; opacity: .9; }
.footer-links { display: grid; grid-template-columns: repeat(3,1fr); gap: 28px; }
.footer-links h2 { color: #fff; font-size: 17px; margin-bottom: 12px; }
.footer-links a { display: block; padding: 4px 0; color: rgba(255,255,255,.9); text-decoration: none; }
.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,.2); border-bottom: 1px solid rgba(255,255,255,.2); font-size: 14px; opacity: .92; }
.footer-bottom { width: min(1160px, calc(100% - 40px)); margin: 0 auto; padding: 20px 0 26px; font-size: 14px; opacity: .9; }
@media (max-width: 1020px) {
    .nav-core { display: none; }
    .hero-grid, .split { grid-template-columns: 1fr; gap: 36px; }
    .hero-copy { text-align: center; }
    .hero-copy .lead { margin-left: auto; margin-right: auto; }
    .hero-actions, .hero-links, .hero-points { justify-content: center; }
    .hero-visual { min-height: 380px; }
    .split.reverse .feature-image { order: initial; }
    .info-grid { grid-template-columns: repeat(2,1fr); }
    .category-grid { grid-template-columns: repeat(2,1fr); }
    .category-card.wide { grid-column: 1 / -1; }
    .review-grid { grid-template-columns: repeat(2,1fr); }
    .footer-inner { grid-template-columns: 1fr; gap: 36px; }
}
@media (max-width: 768px) {
    .header-inner { min-height: 62px; padding: 0 14px; gap: 10px; }
    .site-logo img { max-height: 36px; max-width: 132px; }
    .header-actions { gap: 8px; }
    .header-download { min-height: 44px; padding: 0 15px; font-size: 14px; }
    .menu-button { width: 44px; height: 44px; }
    .container, .narrow { width: min(100% - 32px, 1160px); }
    .section { padding: 62px 0; }
    .section-sm { padding: 44px 0; }
    .hero { padding: 52px 0 64px; }
    h1 { font-size: clamp(36px,11vw,50px); }
    .hero-grid { grid-template-columns: minmax(0,1fr); }
    .hero-visual { min-height: 320px; }
    .hero-visual img { max-height: 420px; }
    .info-grid, .category-grid, .two-card-grid, .review-grid, .news-grid { grid-template-columns: 1fr; }
    .category-card.wide { grid-column: auto; }
    .feature-image { min-height: 280px; }
    .footer-links { grid-template-columns: 1fr 1fr; }
    .page-hero { padding: 50px 0 42px; }
    .article { padding: 50px 0 66px; }
    .article h2 { margin-top: 38px; }
    .cta { padding: 32px 22px; }
    .data-table { display: block; overflow-x: auto; }
}
@media (max-width: 500px) {
    .header-download { padding: 0 12px; }
    .hero-actions .main-btn, .hero-actions .secondary-btn { width: 100%; }
    .info-grid { margin-top: 0; }
    .footer-links { grid-template-columns: 1fr; }
    .site-drawer { width: min(360px, 94vw); }
}
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { scroll-behavior: auto !important; transition: none !important; animation: none !important; }
}