:root {
  --brand: #B93A4A;
  --brand-soft: #D9828D;
  --ink: #2B2528;
  --body: #332D2F;
  --muted: #756B6E;
  --paper: #FFF9F7;
  --surface: #F6ECEB;
  --accent: #E45B4F;
  --line: #E9DAD8;
  --white: #FFFFFF;
  --shadow: 0 18px 48px rgba(43, 37, 40, .09);
  --shadow-soft: 0 8px 30px rgba(43, 37, 40, .06);
  --radius-lg: 28px;
  --radius-md: 18px;
  --radius-sm: 12px;
  --shell: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--body);
  background: var(--paper);
  line-height: 1.75;
  text-rendering: optimizeLegibility;
}
body.modal-open { overflow: hidden; }
a { color: inherit; text-decoration: none; }
a:hover { color: var(--brand); }
img { display: block; max-width: 100%; height: auto; }
button, input { font: inherit; }
button { cursor: pointer; }
.shell { width: min(calc(100% - 40px), var(--shell)); margin-inline: auto; }
.skip-link {
  position: fixed; left: 16px; top: 12px; z-index: 2000; transform: translateY(-160%);
  padding: 10px 14px; border-radius: 10px; background: var(--ink); color: var(--white);
}
.skip-link:focus { transform: none; }

.site-header {
  position: sticky; top: 0; z-index: 900; background: rgba(255, 249, 247, .94);
  border-bottom: 1px solid rgba(185, 58, 74, .10); backdrop-filter: blur(12px);
}
.header-inner { min-height: 78px; display: flex; align-items: center; gap: 22px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; color: var(--ink); white-space: nowrap; }
.brand img { width: 42px; height: 42px; object-fit: contain; border-radius: 12px; }
.primary-nav { display: flex; align-items: center; gap: 6px; margin-left: auto; }
.primary-nav a { padding: 10px 12px; border-radius: 10px; color: #4C4447; font-size: 15px; }
.primary-nav a:hover, .primary-nav a[aria-current="page"] { color: var(--brand); background: var(--surface); }
.menu-toggle { display: none; }
.search-toggle, .menu-toggle, .icon-button, .back-to-top {
  border: 1px solid var(--line); background: var(--white); color: var(--ink); border-radius: 12px; padding: 9px 13px;
}
.search-toggle:hover, .menu-toggle:hover, .icon-button:hover, .back-to-top:hover { border-color: var(--brand-soft); color: var(--brand); }

.search-modal[hidden] { display: none !important; }
.search-modal { position: fixed; inset: 0; z-index: 1500; display: grid; place-items: start center; padding-top: 12vh; }
.search-backdrop { position: absolute; inset: 0; background: rgba(43, 37, 40, .48); }
.search-panel { position: relative; width: min(620px, calc(100% - 32px)); background: var(--paper); border-radius: 24px; box-shadow: var(--shadow); padding: 28px; }
.search-panel-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 20px; }
.search-panel h2 { margin: 2px 0 14px; font-size: 28px; }
.icon-button { width: 42px; height: 42px; padding: 0; font-size: 26px; line-height: 1; }
.search-form label { display: block; font-weight: 700; margin-bottom: 8px; }
.search-row { display: flex; gap: 10px; }
.search-row input { min-width: 0; flex: 1; border: 1px solid var(--line); background: #fff; border-radius: 12px; padding: 12px 14px; color: var(--ink); }
.search-row input:focus { outline: 3px solid rgba(185, 58, 74, .14); border-color: var(--brand); }
.search-hint { margin: 12px 0 0; color: var(--muted); font-size: 14px; }

.breadcrumb-wrap { padding-top: 22px; }
.breadcrumbs ol { list-style: none; display: flex; flex-wrap: wrap; gap: 8px; margin: 0; padding: 0; color: var(--muted); font-size: 14px; }
.breadcrumbs li:not(:last-child)::after { content: "/"; margin-left: 8px; color: #B4A7AA; }
.breadcrumbs a:hover { color: var(--brand); }

main { overflow: clip; }
.hero { padding: 74px 0 56px; }
.hero-grid { display: grid; grid-template-columns: 1.06fr .94fr; gap: 56px; align-items: center; }
.eyebrow { margin: 0 0 8px; color: var(--brand); font-weight: 800; letter-spacing: .08em; font-size: 13px; text-transform: uppercase; }
.hero h1, .page-hero h1 { margin: 0; color: var(--ink); letter-spacing: -.035em; line-height: 1.13; }
.hero h1 { max-width: 14ch; font-size: clamp(42px, 5.5vw, 72px); }
.hero .lead { max-width: 700px; margin: 24px 0 0; font-size: clamp(17px, 2vw, 20px); color: #5D5356; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 46px; padding: 10px 18px; border-radius: 12px; border: 1px solid transparent; font-weight: 800; }
.button.primary { background: var(--accent); color: var(--white); }
.button.primary:hover { color: var(--white); filter: brightness(.96); }
.button.secondary { border-color: var(--line); background: var(--white); color: var(--ink); }
.button.secondary:hover { border-color: var(--brand-soft); color: var(--brand); }
.hero-media { position: relative; }
.hero-media::before { content: ""; position: absolute; width: 60%; aspect-ratio: 1; border-radius: 50%; background: #F1D6D4; filter: blur(2px); right: -8%; top: -10%; z-index: -1; }
.hero-media img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; border-radius: 32px; box-shadow: var(--shadow); }
.hero-note { width: min(86%, 410px); margin: -42px auto 0; position: relative; background: var(--white); border: 1px solid var(--line); border-radius: 18px; padding: 18px 20px; box-shadow: var(--shadow-soft); }
.hero-note strong { display: block; color: var(--ink); }
.hero-note span { display: block; margin-top: 4px; color: var(--muted); font-size: 14px; }

.section { padding: 64px 0; }
.section.alt { background: var(--surface); }
.section.deep { background: var(--ink); color: #F9F3F1; }
.section.deep h2, .section.deep h3 { color: #FFF9F7; }
.section.deep p { color: #DCCFD2; }
.section-head { display: flex; align-items: end; justify-content: space-between; gap: 30px; margin-bottom: 28px; }
.section-head.compact { align-items: start; }
.section-head h2 { margin: 0; color: var(--ink); font-size: clamp(30px, 4vw, 44px); line-height: 1.2; letter-spacing: -.02em; }
.section-head p { max-width: 650px; margin: 10px 0 0; color: var(--muted); }
.section-head .side-note { max-width: 330px; font-size: 15px; }

.entry-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.entry-card, .content-card { background: var(--white); border: 1px solid var(--line); border-radius: var(--radius-md); padding: 24px; box-shadow: var(--shadow-soft); }
.entry-card { min-height: 250px; display: flex; flex-direction: column; }
.entry-card h3, .content-card h3 { margin: 6px 0 10px; color: var(--ink); font-size: 22px; line-height: 1.35; }
.entry-card p, .content-card p { color: var(--muted); }
.entry-card .text-link, .content-card .text-link { margin-top: auto; }
.text-link { display: inline-flex; align-items: center; gap: 3px; color: var(--brand); font-weight: 800; }
.text-link:hover { color: #8D2837; }

.split { display: grid; grid-template-columns: .92fr 1.08fr; gap: 48px; align-items: center; }
.split.reverse { grid-template-columns: 1.08fr .92fr; }
.split.reverse .split-media { order: 2; }
.split-media img { width: 100%; aspect-ratio: 16/11; object-fit: cover; border-radius: 26px; box-shadow: var(--shadow-soft); }
.split-copy h2 { margin: 0 0 16px; color: var(--ink); font-size: clamp(30px, 4vw, 44px); line-height: 1.2; }
.split-copy p { color: var(--muted); }
.check-list { margin: 24px 0 0; padding: 0; list-style: none; display: grid; gap: 12px; }
.check-list li { position: relative; padding-left: 30px; }
.check-list li::before { content: "✓"; position: absolute; left: 0; top: 0; width: 22px; height: 22px; border-radius: 50%; display: grid; place-items: center; background: #F4DADB; color: var(--brand); font-size: 13px; font-weight: 900; }

.guide-strip { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.guide-tile { padding: 22px; border-radius: 18px; background: rgba(255,255,255,.07); border: 1px solid rgba(255,255,255,.12); }
.guide-tile .eyebrow { color: #EFB5BC; }
.guide-tile h3 { margin: 4px 0 8px; font-size: 19px; line-height: 1.35; }
.guide-tile a { color: #FFECEF; font-weight: 800; }
.guide-tile a:hover { color: var(--white); text-decoration: underline; }

.topic-band { display: grid; grid-template-columns: 1.1fr .9fr; gap: 30px; align-items: stretch; }
.topic-feature { position: relative; overflow: hidden; border-radius: 26px; min-height: 420px; background: var(--ink); color: var(--white); }
.topic-feature img { width: 100%; height: 100%; object-fit: cover; opacity: .56; }
.topic-overlay { position: absolute; inset: auto 0 0; padding: 34px; background: linear-gradient(transparent, rgba(43,37,40,.94)); }
.topic-overlay h3 { margin: 6px 0 10px; font-size: 32px; line-height: 1.25; }
.topic-overlay p { margin: 0 0 18px; color: #F1E4E6; }
.topic-aside { display: grid; gap: 14px; }
.topic-aside article { border: 1px solid var(--line); background: var(--white); border-radius: 18px; padding: 22px; }
.topic-aside h3 { margin: 4px 0 8px; color: var(--ink); }
.topic-aside p { margin: 0; color: var(--muted); }
.topic-aside a { display: inline-block; margin-top: 12px; color: var(--brand); font-weight: 800; }

.steps { counter-reset: step; display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.step { counter-increment: step; position: relative; padding: 25px; background: var(--white); border: 1px solid var(--line); border-radius: 18px; }
.step::before { content: "0" counter(step); display: inline-block; color: var(--brand); font-size: 13px; font-weight: 900; letter-spacing: .08em; }
.step h3 { margin: 8px 0 8px; color: var(--ink); font-size: 19px; }
.step p { margin: 0; color: var(--muted); font-size: 15px; }

.notice { border-left: 4px solid var(--brand); background: #FFF0EE; border-radius: 0 14px 14px 0; padding: 18px 20px; }
.notice strong { color: var(--ink); }
.notice p { margin: 6px 0 0; color: #635659; }

.page-hero { padding: 58px 0 38px; }
.page-hero-grid { display: grid; grid-template-columns: 1fr .7fr; gap: 44px; align-items: center; }
.page-hero h1 { max-width: 15ch; font-size: clamp(38px, 5vw, 62px); }
.page-hero .lead { max-width: 760px; margin: 20px 0 0; color: var(--muted); font-size: 18px; }
.page-hero-media img { width: 100%; aspect-ratio: 4/3; object-fit: cover; border-radius: 26px; box-shadow: var(--shadow-soft); }
.page-actions { margin-top: 24px; display: flex; flex-wrap: wrap; gap: 10px; }

.article-layout { display: grid; grid-template-columns: minmax(0, 1fr) 290px; gap: 48px; align-items: start; }
.article-body { min-width: 0; }
.article-body h2 { margin: 48px 0 15px; color: var(--ink); font-size: 30px; line-height: 1.28; }
.article-body h2:first-child { margin-top: 0; }
.article-body h3 { margin: 30px 0 10px; color: var(--ink); font-size: 21px; }
.article-body p { margin: 0 0 16px; }
.article-body ul, .article-body ol { padding-left: 1.4em; }
.article-body li { margin-bottom: 8px; }
.article-body img.article-image { width: 100%; margin: 26px 0; border-radius: 22px; aspect-ratio: 16/8; object-fit: cover; }
.article-aside { position: sticky; top: 104px; display: grid; gap: 14px; }
.aside-card { border: 1px solid var(--line); background: var(--white); border-radius: 16px; padding: 19px; }
.aside-card h2 { margin: 0 0 10px; color: var(--ink); font-size: 18px; }
.aside-card ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.aside-card a { color: #5A4F52; }
.aside-card a:hover { color: var(--brand); }
.domain-box { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 14px 16px; border-radius: 14px; background: var(--surface); }
.domain-box code { color: var(--brand); font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-weight: 800; }
.domain-box button { border: 0; background: var(--brand); color: #fff; border-radius: 9px; padding: 7px 10px; }

.info-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.info-card { border: 1px solid var(--line); background: var(--white); border-radius: 18px; padding: 24px; }
.info-card h3 { margin: 4px 0 8px; color: var(--ink); font-size: 21px; }
.info-card p { margin: 0; color: var(--muted); }

.compare-table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 18px; }
.compare-table { width: 100%; border-collapse: collapse; background: var(--white); min-width: 680px; }
.compare-table th, .compare-table td { padding: 15px 18px; text-align: left; border-bottom: 1px solid var(--line); vertical-align: top; }
.compare-table th { background: #FBF2F0; color: var(--ink); }
.compare-table tr:last-child td { border-bottom: 0; }

.faq-list { border-top: 1px solid var(--line); }
.faq-item { border-bottom: 1px solid var(--line); }
.faq-question { width: 100%; border: 0; background: transparent; padding: 20px 0; display: flex; align-items: center; justify-content: space-between; gap: 18px; color: var(--ink); text-align: left; font-weight: 800; }
.faq-icon { flex: 0 0 32px; width: 32px; height: 32px; border-radius: 50%; display: grid; place-items: center; background: var(--surface); color: var(--brand); font-size: 20px; }
.faq-answer { padding: 0 52px 20px 0; color: var(--muted); }
.faq-answer p { margin: 0; }

.search-results { display: grid; gap: 14px; }
.search-result { border: 1px solid var(--line); background: var(--white); border-radius: 16px; padding: 20px; }
.search-result h2 { margin: 0 0 8px; font-size: 22px; color: var(--ink); }
.search-result p { margin: 0 0 10px; color: var(--muted); }
.search-empty { padding: 30px; border: 1px dashed var(--brand-soft); border-radius: 18px; background: #FFF5F3; }

.site-footer { margin-top: 60px; background: var(--ink); color: #E5DADC; }
.footer-grid { display: grid; grid-template-columns: 1.4fr repeat(3, 1fr); gap: 36px; padding: 56px 0 42px; }
.footer-brand { color: #FFF9F7; }
.footer-intro p { max-width: 420px; color: #CFC0C3; }
.footer-group h2 { margin: 0 0 12px; color: #FFF9F7; font-size: 16px; }
.footer-group ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.footer-group a { color: #CFC0C3; font-size: 14px; }
.footer-group a:hover { color: #FFF; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.10); min-height: 78px; display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.footer-bottom p { margin: 0; color: #B9AAAD; font-size: 13px; }
.back-to-top { background: transparent; color: #E8DDE0; border-color: rgba(255,255,255,.16); }

.muted { color: var(--muted); }
.kicker { max-width: 820px; font-size: 18px; color: var(--muted); }
.tag-list { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; }
.tag { display: inline-flex; padding: 7px 10px; border-radius: 999px; background: var(--surface); color: #65595C; font-size: 13px; }
.callout-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.callout { border-top: 3px solid var(--brand-soft); background: var(--white); border-radius: 0 0 16px 16px; padding: 22px; box-shadow: var(--shadow-soft); }
.callout h3 { margin: 0 0 8px; color: var(--ink); }
.callout p { margin: 0; color: var(--muted); }
.prose-box { padding: 28px; border-radius: 20px; background: var(--white); border: 1px solid var(--line); }
.prose-box > :first-child { margin-top: 0; }
.prose-box > :last-child { margin-bottom: 0; }

@media (max-width: 1100px) {
  .header-inner { gap: 14px; }
  .primary-nav a { padding-inline: 9px; font-size: 14px; }
  .guide-strip, .steps { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 920px) {
  .menu-toggle { display: inline-flex; margin-left: auto; }
  .primary-nav { display: none; position: absolute; left: 20px; right: 20px; top: 72px; background: var(--paper); border: 1px solid var(--line); border-radius: 18px; box-shadow: var(--shadow); padding: 12px; }
  .primary-nav.is-open { display: grid; }
  .primary-nav a { padding: 12px 14px; }
  .search-toggle { margin-left: 0; }
  .hero-grid, .page-hero-grid, .split, .split.reverse, .topic-band, .article-layout { grid-template-columns: 1fr; }
  .split.reverse .split-media { order: initial; }
  .hero-media { max-width: 720px; }
  .entry-grid { grid-template-columns: 1fr 1fr; }
  .article-aside { position: static; grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1.4fr 1fr 1fr; }
  .footer-group:last-child { grid-column: 2 / -1; }
}

@media (max-width: 720px) {
  .shell { width: min(calc(100% - 28px), var(--shell)); }
  .header-inner { min-height: 68px; }
  .brand img { width: 38px; height: 38px; }
  .brand span { font-size: 15px; }
  .search-toggle { font-size: 0; width: 42px; height: 42px; padding: 0; }
  .search-toggle::before { content: "搜"; font-size: 14px; }
  .hero { padding: 48px 0 36px; }
  .hero-grid, .page-hero-grid { gap: 30px; }
  .hero h1 { font-size: clamp(38px, 12vw, 54px); }
  .page-hero { padding: 42px 0 26px; }
  .page-hero h1 { font-size: clamp(34px, 10vw, 48px); }
  .section { padding: 48px 0; }
  .section-head { display: block; }
  .section-head .side-note { margin-top: 14px; }
  .entry-grid, .info-grid, .callout-grid, .article-aside { grid-template-columns: 1fr; }
  .guide-strip, .steps { grid-template-columns: 1fr; }
  .topic-feature { min-height: 360px; }
  .topic-overlay { padding: 24px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-intro { grid-column: 1 / -1; }
  .footer-group:last-child { grid-column: auto; }
  .footer-bottom { padding: 18px 0; align-items: flex-start; flex-direction: column; }
  .article-body h2 { font-size: 27px; }
  .faq-answer { padding-right: 0; }
}

@media (max-width: 520px) {
  .header-inner { gap: 8px; }
  .menu-toggle { padding: 9px 11px; }
  .brand span { display: none; }
  .hero-actions, .page-actions { align-items: stretch; flex-direction: column; }
  .hero-actions .button, .page-actions .button { width: 100%; }
  .entry-grid, .footer-grid { grid-template-columns: 1fr; }
  .footer-intro, .footer-group:last-child { grid-column: auto; }
  .search-panel { padding: 22px; }
  .search-row { flex-direction: column; }
  .search-row .button { width: 100%; }
  .topic-overlay h3 { font-size: 26px; }
  .domain-box { align-items: flex-start; flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { scroll-behavior: auto !important; transition: none !important; animation: none !important; }
}