:root {
  --primary: #6F5AE8;
  --primary-soft: #9A8CF2;
  --ink: #242433;
  --text: #30303A;
  --muted: #70707D;
  --bg: #F8F8FC;
  --surface: #FFFFFF;
  --surface-soft: #F0EEFA;
  --accent: #F29A4A;
  --line: #E4E1F2;
  --danger: #B24444;
  --shadow: 0 18px 55px rgba(36, 36, 51, 0.08);
  --radius: 22px;
  --radius-sm: 14px;
  --max: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.72;
  -webkit-font-smoothing: antialiased;
}
body.modal-open { overflow: hidden; }
a { color: inherit; text-decoration: none; }
a:hover { color: var(--primary); }
img { max-width: 100%; height: auto; display: block; }
button, input { font: inherit; }
button { cursor: pointer; }
.container { width: min(calc(100% - 40px), var(--max)); margin: 0 auto; }
.container.narrow { width: min(calc(100% - 40px), 840px); }
.skip-link { position: fixed; left: 16px; top: -70px; background: var(--ink); color: #fff; padding: 10px 14px; border-radius: 10px; z-index: 1000; }
.skip-link:focus { top: 16px; }
.site-header { position: sticky; top: 0; z-index: 50; background: rgba(248,248,252,.95); border-bottom: 1px solid rgba(228,225,242,.85); backdrop-filter: blur(12px); }
.header-inner { min-height: 76px; display: flex; align-items: center; gap: 22px; }
.brand { display: inline-flex; align-items: center; gap: 11px; flex-shrink: 0; }
.brand img { width: 44px; height: 44px; object-fit: contain; border-radius: 12px; }
.brand span { display: grid; line-height: 1.25; }
.brand strong { color: var(--ink); font-size: 18px; }
.brand small { margin-top: 4px; color: var(--muted); font-size: 12px; }
.primary-nav { margin-left: auto; display: flex; align-items: center; gap: 4px; }
.primary-nav a { padding: 9px 10px; border-radius: 10px; color: #555563; font-size: 14px; white-space: nowrap; }
.primary-nav a:hover, .primary-nav a.active { color: var(--primary); background: var(--surface-soft); }
.search-open, .nav-toggle { border: 1px solid var(--line); background: var(--surface); color: var(--ink); padding: 9px 13px; border-radius: 11px; }
.nav-toggle { display: none; margin-left: auto; }
.search-open:hover, .nav-toggle:hover { border-color: var(--primary-soft); color: var(--primary); }
.search-modal[hidden] { display: none !important; }
.search-modal { position: fixed; inset: 0; z-index: 200; display: grid; place-items: start center; padding-top: 11vh; }
.search-backdrop { position: absolute; inset: 0; background: rgba(24,24,34,.62); }
.search-panel { position: relative; width: min(calc(100% - 32px), 720px); background: #fff; border-radius: 24px; padding: 30px; box-shadow: 0 30px 90px rgba(0,0,0,.2); }
.search-panel h2 { margin: 6px 0 18px; color: var(--ink); font-size: clamp(24px, 4vw, 34px); }
.search-close { position: absolute; right: 18px; top: 16px; width: 38px; height: 38px; border: 0; background: var(--surface-soft); border-radius: 50%; font-size: 24px; }
.search-form label { display: block; font-weight: 650; margin-bottom: 8px; }
.search-row { display: flex; gap: 10px; }
.search-row input { flex: 1; min-width: 0; border: 1px solid var(--line); border-radius: 12px; padding: 12px 14px; outline: none; }
.search-row input:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(111,90,232,.12); }
.site-main { min-height: 65vh; }
.hero { padding: 76px 0 54px; overflow: hidden; }
.hero-grid { display: grid; grid-template-columns: 1.08fr .92fr; gap: 44px; align-items: center; }
.eyebrow { display: inline-flex; align-items: center; gap: 8px; color: var(--primary); font-size: 13px; font-weight: 750; letter-spacing: .08em; text-transform: uppercase; }
.eyebrow::before { content: ""; width: 22px; height: 2px; background: var(--primary-soft); border-radius: 4px; }
.hero h1, .page-hero h1, .article-header h1 { color: var(--ink); line-height: 1.12; letter-spacing: -.035em; margin: 12px 0 18px; font-size: clamp(38px, 6vw, 68px); }
.hero p, .page-hero .lead, .article-header .lead { color: #565665; font-size: clamp(17px, 2vw, 20px); max-width: 760px; }
.button-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.btn { display: inline-flex; justify-content: center; align-items: center; min-height: 46px; padding: 10px 17px; border-radius: 12px; border: 1px solid transparent; font-weight: 700; }
.btn.primary { background: var(--accent); color: #2c241c; }
.btn.primary:hover { color: #2c241c; filter: brightness(.97); }
.btn.secondary { border-color: var(--line); background: #fff; color: var(--ink); }
.btn.secondary:hover { border-color: var(--primary-soft); color: var(--primary); }
.hero-visual { position: relative; background: var(--surface-soft); border: 1px solid var(--line); border-radius: 32px; padding: 22px; min-height: 390px; display: grid; place-items: center; }
.hero-visual::before { content: ""; position: absolute; width: 160px; height: 160px; border: 34px solid rgba(111,90,232,.13); border-radius: 50%; right: -54px; top: -54px; }
.hero-visual img { width: 100%; max-height: 360px; object-fit: cover; border-radius: 22px; box-shadow: var(--shadow); }
.section { padding: 60px 0; }
.section.soft { background: var(--surface-soft); }
.section.dark { background: var(--ink); color: #fff; }
.section-head { display: flex; justify-content: space-between; gap: 24px; align-items: end; margin-bottom: 28px; }
.section-head .copy { max-width: 720px; }
.section h2, .content h2 { color: var(--ink); line-height: 1.2; letter-spacing: -.02em; font-size: clamp(28px, 4vw, 42px); margin: 8px 0 12px; }
.section.dark h2 { color: #fff; }
.section-head p, .section-lead { margin: 0; color: var(--muted); }
.section.dark .section-head p { color: #c8c8d1; }
.cards-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.topic-card, .info-card, .guide-card, .result-card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.topic-card img, .guide-card img { width: 100%; aspect-ratio: 16/9; object-fit: cover; background: #e9e6f5; }
.card-body { padding: 22px; }
.card-body h3 { margin: 0 0 9px; color: var(--ink); font-size: 21px; line-height: 1.35; }
.card-body p { margin: 0 0 16px; color: var(--muted); }
.text-link { color: var(--primary); font-weight: 750; }
.text-link::after { content: " →"; }
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 36px; align-items: center; }
.split-media { background: var(--surface-soft); padding: 18px; border-radius: 26px; border: 1px solid var(--line); }
.split-media img { width: 100%; aspect-ratio: 4/3; object-fit: cover; border-radius: 18px; }
.editorial-list { display: grid; gap: 0; border-top: 1px solid var(--line); }
.editorial-item { display: grid; grid-template-columns: 74px 1fr; gap: 20px; padding: 22px 0; border-bottom: 1px solid var(--line); }
.editorial-item .number { font-size: 13px; font-weight: 800; color: var(--primary); }
.editorial-item h3 { margin: 0 0 6px; color: var(--ink); font-size: 20px; }
.editorial-item p { margin: 0; color: var(--muted); }
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.step { padding: 24px; border-radius: var(--radius); border: 1px solid var(--line); background: #fff; }
.step .step-number { font-weight: 850; font-size: 13px; color: var(--primary); }
.step h3 { margin: 12px 0 8px; color: var(--ink); }
.step p { margin: 0; color: var(--muted); }
.notice { border-left: 4px solid var(--accent); background: #fff8f0; padding: 17px 18px; border-radius: 0 14px 14px 0; color: #57493e; }
.notice strong { color: #3d322b; }
.page-hero { padding: 54px 0 34px; }
.page-hero h1 { font-size: clamp(34px, 5vw, 56px); max-width: 900px; }
.breadcrumb { font-size: 13px; color: var(--muted); padding-top: 22px; }
.breadcrumb ol { list-style: none; display: flex; flex-wrap: wrap; gap: 7px; padding: 0; margin: 0; }
.breadcrumb li:not(:last-child)::after { content: "/"; margin-left: 7px; color: #aaa8b5; }
.breadcrumb a:hover { color: var(--primary); }
.content-layout { display: grid; grid-template-columns: minmax(0, 1fr) 290px; gap: 44px; align-items: start; }
.content { min-width: 0; }
.content h2 { font-size: 30px; margin-top: 42px; }
.content h3 { color: var(--ink); font-size: 21px; margin-top: 28px; }
.content p { margin: 0 0 17px; }
.content ul, .content ol { padding-left: 1.25em; }
.content li { margin: 8px 0; }
.sidebar { position: sticky; top: 98px; display: grid; gap: 16px; }
.side-card { padding: 20px; background: #fff; border: 1px solid var(--line); border-radius: 16px; }
.side-card h2 { font-size: 16px; margin: 0 0 12px; }
.side-card a { display: block; padding: 8px 0; border-bottom: 1px solid #efedf6; font-size: 14px; }
.side-card a:last-child { border-bottom: 0; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.info-card { padding: 24px; }
.info-card h3 { margin: 0 0 8px; color: var(--ink); }
.info-card p { margin: 0; color: var(--muted); }
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 18px; background: #fff; }
table { width: 100%; border-collapse: collapse; min-width: 680px; }
th, td { text-align: left; padding: 15px 17px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { background: var(--surface-soft); color: var(--ink); font-size: 14px; }
tr:last-child td { border-bottom: 0; }
.faq-list { display: grid; gap: 12px; }
.faq-item { background: #fff; border: 1px solid var(--line); border-radius: 15px; overflow: hidden; }
.faq-button { width: 100%; text-align: left; border: 0; background: #fff; color: var(--ink); padding: 17px 20px; font-weight: 750; display: flex; justify-content: space-between; gap: 14px; }
.faq-button::after { content: "+"; color: var(--primary); font-size: 20px; }
.faq-button[aria-expanded="true"]::after { content: "−"; }
.faq-answer { padding: 0 20px 19px; color: var(--muted); }
.faq-answer p { margin: 0; }
.article-header { padding: 42px 0 26px; }
.article-header h1 { font-size: clamp(34px, 5vw, 54px); max-width: 960px; }
.article-meta { display: flex; flex-wrap: wrap; gap: 10px 18px; color: var(--muted); font-size: 13px; margin-top: 18px; }
.article-cover { margin: 24px 0 32px; padding: 16px; background: var(--surface-soft); border-radius: 24px; border: 1px solid var(--line); }
.article-cover img { width: 100%; max-height: 480px; object-fit: cover; border-radius: 16px; }
.guide-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.guide-card { display: grid; grid-template-columns: 180px 1fr; }
.guide-card img { height: 100%; min-height: 190px; aspect-ratio: auto; }
.result-list { display: grid; gap: 14px; }
.result-card { padding: 20px; }
.result-card .result-type { color: var(--primary); font-weight: 800; font-size: 12px; letter-spacing: .06em; }
.result-card h2 { margin: 5px 0 8px; font-size: 21px; }
.result-card p { margin: 0; color: var(--muted); }
.empty-state { padding: 34px; text-align: center; background: #fff; border: 1px dashed #cfcbe7; border-radius: 18px; }
.cta-band { display: grid; grid-template-columns: 1fr auto; gap: 24px; align-items: center; background: var(--ink); color: #fff; border-radius: 28px; padding: 32px; }
.cta-band h2 { margin: 0 0 8px; color: #fff; font-size: 30px; }
.cta-band p { margin: 0; color: #c7c7d0; }
.site-footer { margin-top: 70px; padding: 54px 0 22px; background: #20202d; color: #d8d8df; }
.footer-grid { display: grid; grid-template-columns: 1.5fr repeat(3, 1fr); gap: 34px; }
.footer-brand strong { color: #fff; }
.footer-brand small { color: #aaaab6; }
.footer-intro p { color: #aaaab6; max-width: 320px; }
.site-footer h2 { margin: 0 0 12px; font-size: 15px; color: #fff; }
.site-footer a { display: block; padding: 5px 0; font-size: 14px; color: #c8c8d1; }
.site-footer a:hover { color: #fff; }
.footer-bottom { display: flex; justify-content: space-between; gap: 20px; margin-top: 38px; padding-top: 20px; border-top: 1px solid #363645; color: #9999a7; font-size: 13px; }
.footer-bottom a { padding: 0; }
.back-to-top { position: fixed; right: 22px; bottom: 22px; width: 44px; height: 44px; border: 0; border-radius: 50%; background: var(--primary); color: #fff; box-shadow: var(--shadow); opacity: 0; pointer-events: none; transform: translateY(8px); transition: .2s ease; }
.back-to-top.visible { opacity: 1; pointer-events: auto; transform: translateY(0); }
.error-page { padding: 90px 0; text-align: center; }
.error-page h1 { color: var(--ink); font-size: clamp(36px, 6vw, 64px); margin: 10px 0 15px; }
.error-page p { color: var(--muted); font-size: 18px; }
.error-page .button-row { justify-content: center; }

@media (max-width: 1050px) {
  .primary-nav { position: absolute; top: 76px; left: 20px; right: 20px; display: none; background: #fff; border: 1px solid var(--line); border-radius: 16px; padding: 10px; box-shadow: var(--shadow); }
  .primary-nav.open { display: grid; }
  .primary-nav a { padding: 11px 12px; }
  .nav-toggle { display: inline-flex; }
  .search-open { margin-left: 0; }
  .content-layout { grid-template-columns: 1fr; }
  .sidebar { position: static; grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 860px) {
  .hero { padding-top: 48px; }
  .hero-grid, .split { grid-template-columns: 1fr; }
  .hero-visual { min-height: auto; }
  .cards-3, .steps { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .guide-grid { grid-template-columns: 1fr; }
}
@media (max-width: 680px) {
  .container, .container.narrow { width: min(calc(100% - 28px), var(--max)); }
  .header-inner { min-height: 68px; gap: 10px; }
  .brand small { display: none; }
  .brand img { width: 38px; height: 38px; }
  .brand strong { font-size: 16px; }
  .search-open { padding: 8px 10px; font-size: 13px; }
  .nav-toggle { padding: 8px 10px; font-size: 13px; }
  .primary-nav { top: 68px; left: 14px; right: 14px; }
  .hero h1, .page-hero h1, .article-header h1 { font-size: 37px; }
  .hero { padding-bottom: 34px; }
  .section { padding: 44px 0; }
  .section-head { align-items: start; flex-direction: column; }
  .grid-2, .sidebar { grid-template-columns: 1fr; }
  .editorial-item { grid-template-columns: 48px 1fr; gap: 12px; }
  .guide-card { grid-template-columns: 1fr; }
  .guide-card img { min-height: 0; aspect-ratio: 16/9; }
  .search-row { flex-direction: column; }
  .search-panel { padding: 26px 20px 22px; }
  .cta-band { grid-template-columns: 1fr; padding: 24px; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; }
}
@media (max-width: 420px) {
  .button-row { flex-direction: column; }
  .btn { width: 100%; }
  .search-open { font-size: 0; width: 40px; height: 40px; }
  .search-open::before { content: "⌕"; font-size: 20px; }
}