:root {
  --brand: #B9473F;
  --amber: #D89A45;
  --ink: #1E2026;
  --paper: #F7F4EF;
  --soft: #EEE9E2;
  --text: #2B2D31;
  --muted: #6F706F;
  --accent: #E06A3B;
  --line: rgba(30,32,38,.13);
  --shadow: 0 18px 50px rgba(30,32,38,.10);
  --radius: 22px;
  --shell: min(1180px, calc(100vw - 48px));
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--paper); color: var(--text); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", Arial, sans-serif; line-height: 1.75; }
body.modal-open { overflow: hidden; }
a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: 4px; }
img { display: block; max-width: 100%; height: auto; object-fit: cover; }
button, input { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
.shell { width: var(--shell); margin-inline: auto; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip-link { position: fixed; top: 8px; left: 8px; z-index: 1000; transform: translateY(-160%); background: var(--ink); color: #fff; padding: 8px 12px; border-radius: 8px; }
.skip-link:focus { transform: none; }
.site-header { position: sticky; top: 0; z-index: 40; background: rgba(247,244,239,.95); backdrop-filter: blur(14px); border-bottom: 1px solid var(--line); }
.header-inner { min-height: 78px; display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 11px; text-decoration: none; }
.brand img { width: 44px; height: 44px; border-radius: 12px; background: var(--soft); }
.brand span { display: grid; line-height: 1.2; }
.brand strong { color: var(--ink); font-size: 17px; }
.brand small { margin-top: 4px; color: var(--muted); font-size: 11px; letter-spacing: .08em; }
.primary-nav { display: flex; justify-content: center; gap: 4px; }
.primary-nav a { text-decoration: none; color: var(--muted); padding: 8px 10px; border-radius: 999px; font-size: 14px; }
.primary-nav a:hover, .primary-nav a[aria-current="page"] { background: var(--soft); color: var(--ink); }
.search-open, .menu-toggle { border: 1px solid var(--line); background: transparent; color: var(--ink); border-radius: 999px; padding: 9px 15px; cursor: pointer; }
.menu-toggle { display: none; }
.eyebrow { margin: 0 0 10px; color: var(--brand); font-size: 13px; font-weight: 800; letter-spacing: .14em; text-transform: uppercase; }
.hero { display: grid; grid-template-columns: 1.05fr .95fr; gap: 54px; align-items: center; padding: 78px 0 66px; }
.hero h1, .page-hero h1 { margin: 0; color: var(--ink); line-height: 1.08; letter-spacing: -.03em; font-size: clamp(42px, 5vw, 72px); }
.hero-lead, .lead { color: #494A4E; font-size: clamp(18px, 1.8vw, 21px); max-width: 760px; }
.hero-media img, .page-hero-media img { width: 100%; aspect-ratio: 1.05/1; border-radius: 34px 34px 10px 34px; box-shadow: var(--shadow); background: var(--soft); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 46px; padding: 11px 18px; border-radius: 12px; border: 1px solid var(--brand); background: var(--brand); color: #fff; text-decoration: none; font-weight: 760; }
.button:hover { filter: brightness(.97); }
.button-secondary { background: transparent; color: var(--brand); }
.hero-facts { margin: 28px 0 0; display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 12px; }
.hero-facts div { padding: 14px 16px; border-top: 1px solid var(--line); }
.hero-facts dt { font-size: 12px; color: var(--muted); }
.hero-facts dd { margin: 3px 0 0; font-weight: 760; }
.section { padding: 64px 0; }
.section-heading { max-width: 760px; margin-bottom: 30px; }
.section-heading h2, .intro-grid h2, .split-copy h2, .callout h2, .two-col-note h2 { margin: 0 0 12px; color: var(--ink); font-size: clamp(29px, 3.2vw, 44px); line-height: 1.16; letter-spacing: -.02em; }
.section-heading p:last-child { color: var(--muted); }
.intro-strip { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.intro-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 70px; align-items: start; }
.intro-grid p { margin: 0; font-size: 18px; color: var(--muted); }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.feature-card { min-height: 310px; display: flex; flex-direction: column; padding: 26px; border-radius: var(--radius); background: var(--soft); border: 1px solid rgba(30,32,38,.07); }
.feature-card span { align-self: flex-start; color: var(--brand); background: #fff8; border: 1px solid var(--line); border-radius: 999px; padding: 5px 10px; font-size: 12px; }
.feature-card h3 { margin: 34px 0 10px; font-size: 25px; line-height: 1.2; }
.feature-card p { color: var(--muted); }
.text-link { margin-top: auto; color: var(--brand); font-weight: 750; text-decoration: none; }
.editorial-band { background: var(--ink); color: #F7F4EF; padding: 66px 0; }
.editorial-band .eyebrow { color: #F0B067; }
.editorial-band h2 { color: #fff; }
.split-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 54px; align-items: center; }
.split-layout.reverse .split-copy { order: 1; }
.split-layout.reverse .split-media { order: 2; }
.split-media img { width: 100%; border-radius: 28px; aspect-ratio: 1.28/1; background: #2c2f36; }
.split-copy p { color: #d7d7d7; }
.split-copy .button-secondary { border-color: #f0b067; color: #f0b067; }
.topic-list { border-top: 1px solid var(--line); }
.topic-row { display: grid; grid-template-columns: 70px 1fr auto; gap: 18px; align-items: center; padding: 24px 4px; border-bottom: 1px solid var(--line); text-decoration: none; }
.topic-row:hover strong { color: var(--brand); }
.topic-index { color: var(--brand); font-weight: 820; }
.topic-row span:nth-child(2) { display: grid; }
.topic-row strong { font-size: 22px; }
.topic-row small { margin-top: 3px; color: var(--muted); font-size: 14px; }
.topic-row b { font-size: 22px; }
.magazine-grid { display: grid; grid-template-columns: 1.35fr 1fr; gap: 18px; }
.magazine-card { padding: 24px; border: 1px solid var(--line); border-radius: var(--radius); }
.magazine-card-large { grid-row: span 3; }
.magazine-card-large img { margin: -24px -24px 22px; width: calc(100% + 48px); max-width: none; border-radius: var(--radius) var(--radius) 0 0; aspect-ratio: 1.55/1; }
.magazine-card h3 { margin: 4px 0 9px; font-size: 22px; line-height: 1.28; }
.magazine-card-large h3 { font-size: 32px; }
.magazine-card h3 a { text-decoration: none; }
.magazine-card p:last-child { color: var(--muted); }
.meta { color: var(--brand); font-size: 12px; font-weight: 800; letter-spacing: .08em; }
.steps { display: grid; grid-template-columns: repeat(3,1fr); gap: 18px; }
.steps > div { border-top: 2px solid var(--brand); padding: 20px 4px 0; }
.steps span, .feedback-grid span { color: var(--amber); font-weight: 900; font-size: 13px; letter-spacing: .12em; }
.steps h3 { font-size: 23px; margin: 10px 0 7px; }
.steps p { color: var(--muted); }
.search-promo { display: grid; grid-template-columns: 1.1fr .9fr; gap: 50px; background: var(--soft); border-radius: 30px; padding: 44px; }
.inline-search { display: flex; align-self: center; gap: 8px; }
.inline-search input { flex: 1; min-width: 0; border: 1px solid var(--line); background: #fff; border-radius: 12px; padding: 12px 14px; }
.inline-search button, .search-row button { border: 0; border-radius: 12px; background: var(--accent); color: #fff; padding: 11px 16px; font-weight: 780; cursor: pointer; }
.faq-list { display: grid; gap: 10px; }
.faq-list details { border-top: 1px solid var(--line); padding: 16px 0; }
.faq-list summary { cursor: pointer; color: var(--ink); font-size: 18px; font-weight: 760; }
.faq-list details p { margin: 12px 0 0; max-width: 900px; color: var(--muted); }
.about-panel { display: grid; grid-template-columns: .92fr 1.08fr; gap: 44px; align-items: center; padding: 34px; background: #fff6; border: 1px solid var(--line); border-radius: 30px; }
.about-panel img { border-radius: 22px; aspect-ratio: 1.35/1; }
.site-footer { margin-top: 60px; background: #191B20; color: #d9d9da; }
.footer-grid { display: grid; grid-template-columns: 1.4fr repeat(3, .7fr); gap: 36px; padding: 58px 0 42px; }
.footer-grid h2 { margin: 0 0 12px; color: #fff; font-size: 14px; }
.footer-grid a { display: block; margin: 8px 0; color: #c5c5c6; text-decoration: none; font-size: 14px; }
.footer-about p { max-width: 420px; color: #aaa; }
.footer-brand { color: #fff!important; font-size: 22px!important; font-weight: 800; }
.footer-bottom { display: flex; justify-content: space-between; gap: 18px; padding: 18px 0; border-top: 1px solid #ffffff1a; color: #8f9094; font-size: 12px; }
.page-hero { display: grid; grid-template-columns: 1fr .62fr; gap: 48px; align-items: center; padding: 44px 0 60px; }
.page-hero h1 { font-size: clamp(38px, 4.5vw, 62px); }
.breadcrumbs { width: var(--shell); margin: 24px auto 0; font-size: 13px; color: var(--muted); }
.breadcrumbs ol { display: flex; flex-wrap: wrap; gap: 7px; list-style: none; padding: 0; margin: 0; }
.breadcrumbs li:not(:last-child)::after { content: '/'; margin-left: 7px; color: #aaa; }
.breadcrumbs a { text-decoration: none; }
.content-layout { display: grid; grid-template-columns: minmax(0,1fr) 320px; gap: 50px; align-items: start; }
.article-body { font-size: 18px; }
.article-body h2 { margin: 42px 0 12px; color: var(--ink); font-size: 30px; line-height: 1.25; }
.article-body p { margin: 0 0 19px; }
.check-list { padding: 0; list-style: none; }
.check-list li { position: relative; margin: 14px 0; padding-left: 28px; }
.check-list li::before { content: '✓'; position: absolute; left: 0; top: 0; color: var(--brand); font-weight: 900; }
.note { margin: 30px 0; padding: 22px; border-left: 4px solid var(--amber); background: var(--soft); border-radius: 0 16px 16px 0; }
.note strong { color: var(--ink); }
.note p { margin: 6px 0 0; }
.side-panel { position: sticky; top: 104px; padding: 24px; border-radius: 18px; background: var(--soft); }
.side-panel h2 { margin-top: 0; font-size: 20px; }
.side-panel dl { margin: 0 0 20px; }
.side-panel dl div { padding: 12px 0; border-top: 1px solid var(--line); }
.side-panel dt { color: var(--muted); font-size: 12px; }
.side-panel dd { margin: 2px 0 0; font-weight: 780; }
.side-panel ul { padding-left: 18px; }
.article-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.article-card { display: flex; flex-direction: column; min-height: 260px; padding: 24px; border: 1px solid var(--line); border-radius: 18px; background: #fff4; }
.article-card h2, .article-card h3 { margin: 4px 0 9px; font-size: 21px; line-height: 1.3; }
.article-card h2 a, .article-card h3 a { text-decoration: none; }
.article-card p { color: var(--muted); }
.callout { margin-block: 46px; display: flex; align-items: center; justify-content: space-between; gap: 30px; padding: 34px 38px; background: var(--ink); color: #e9e9ea; border-radius: 24px; }
.callout h2 { color: #fff; font-size: 30px; }
.callout p { margin-bottom: 0; max-width: 760px; }
.access-board { display: grid; grid-template-columns: .82fr 1.18fr; gap: 44px; align-items: center; }
.domain-card { padding: 30px; background: var(--soft); border-radius: 22px; }
.domain-card h2 { margin: 0; color: var(--ink); font-size: clamp(28px, 4vw, 48px); word-break: break-all; }
.domain-card .button { margin-top: 12px; }
.access-copy h2 { font-size: 34px; margin-top: 0; }
.number-list { list-style: none; padding: 0; counter-reset: steps; }
.number-list li { counter-increment: steps; display: grid; grid-template-columns: 54px 1fr; padding: 20px 0; border-top: 1px solid var(--line); }
.number-list li::before { content: counter(steps, decimal-leading-zero); color: var(--brand); font-weight: 900; }
.guide-index { padding-top: 20px; }
.guide-row { display: grid; grid-template-columns: 60px 1fr 40px; gap: 20px; align-items: start; padding: 28px 0; border-top: 1px solid var(--line); }
.guide-row h2 { margin: 4px 0 8px; font-size: 28px; }
.guide-row h2 a { text-decoration: none; }
.guide-row p { margin: 0; color: var(--muted); }
.guide-num { color: var(--amber); font-weight: 900; }
.row-arrow { text-decoration: none; font-size: 24px; }
.two-col-note { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; align-items: start; border-top: 1px solid var(--line); }
.tag-links { display: flex; flex-wrap: wrap; gap: 10px; }
.tag-links a { padding: 9px 13px; background: var(--soft); border-radius: 999px; text-decoration: none; }
.article-detail { padding-top: 36px; }
.article-header { max-width: 900px; margin: 0 auto 34px; text-align: center; }
.article-header h1 { margin: 0; color: var(--ink); font-size: clamp(38px, 5vw, 62px); line-height: 1.12; }
.article-cover { width: 100%; aspect-ratio: 1.9/1; border-radius: 28px; background: var(--soft); }
.narrow { width: min(760px, 100%); margin: 44px auto 0; }
.faq-page { width: min(940px, calc(100vw - 48px)); }
.legal-copy { width: min(860px, calc(100vw - 48px)); }
.legal-copy h2 { margin: 38px 0 8px; font-size: 28px; }
.legal-copy code { background: var(--soft); padding: 2px 6px; border-radius: 6px; }
.feedback-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 18px; }
.feedback-grid article { padding: 28px; border-top: 2px solid var(--brand); background: #fff4; }
.feedback-grid h2 { font-size: 24px; }
.steps.vertical { grid-template-columns: repeat(2,1fr); }
.steps.vertical > div { display: grid; grid-template-columns: 54px 1fr; align-items: start; }
.steps.vertical p { margin: 0; }
.search-modal[hidden] { display: none !important; }
.search-modal { position: fixed; z-index: 100; inset: 0; display: grid; place-items: start center; padding-top: 10vh; background: rgba(20,22,27,.72); }
.search-dialog { position: relative; width: min(680px, calc(100vw - 32px)); padding: 34px; background: var(--paper); border-radius: 24px; box-shadow: 0 30px 90px #0005; }
.search-dialog h2 { margin: 0 0 20px; }
.search-close { position: absolute; top: 16px; right: 16px; width: 38px; height: 38px; border: 0; border-radius: 50%; background: var(--soft); cursor: pointer; font-size: 24px; }
.search-form label { display: block; margin-bottom: 7px; font-weight: 740; }
.search-row { display: flex; gap: 8px; }
.search-row input { min-width: 0; flex: 1; border: 1px solid var(--line); border-radius: 12px; background: #fff; padding: 11px 13px; }
.search-note { color: var(--muted); font-size: 13px; }
.search-page-hero .page-hero-copy { max-width: 720px; }
.search-results { padding-top: 12px; }
.empty-state { padding: 40px; border: 1px dashed var(--line); border-radius: 20px; text-align: center; }
.result-count { margin-bottom: 16px; color: var(--muted); }
.result-list article { padding: 22px 0; border-top: 1px solid var(--line); }
.result-list h2 { margin: 3px 0 8px; }
.result-list h2 a { text-decoration: none; }
.result-list p:last-child { color: var(--muted); }
.not-found { padding: 110px 0; text-align: center; }
.not-found h1 { margin: 0; font-size: clamp(42px, 6vw, 74px); }
.not-found > p { color: var(--muted); font-size: 18px; }
.not-found .hero-actions { justify-content: center; }
.not-found-links { display: flex; flex-wrap: wrap; gap: 14px; justify-content: center; margin-top: 28px; }
.not-found-links a { color: var(--brand); }
.back-top { position: fixed; right: 22px; bottom: 22px; width: 44px; height: 44px; border: 0; border-radius: 50%; background: var(--brand); color: #fff; cursor: pointer; box-shadow: var(--shadow); opacity: 0; pointer-events: none; transform: translateY(10px); transition: .2s ease; }
.back-top.is-visible { opacity: 1; pointer-events: auto; transform: none; }
@media (max-width: 1100px) {
  :root { --shell: min(100% - 36px, 1000px); }
  .header-inner { grid-template-columns: auto auto 1fr auto; gap: 12px; }
  .menu-toggle { display: inline-flex; justify-self: end; }
  .primary-nav { position: absolute; top: 78px; left: 18px; right: 18px; display: none; padding: 14px; background: var(--paper); border: 1px solid var(--line); border-radius: 18px; box-shadow: var(--shadow); }
  .primary-nav.is-open { display: grid; grid-template-columns: repeat(2,1fr); }
  .primary-nav a { padding: 10px 12px; }
  .hero, .page-hero { gap: 34px; }
  .feature-grid, .article-grid, .feedback-grid { grid-template-columns: repeat(2,1fr); }
  .footer-grid { grid-template-columns: 1.2fr repeat(3,.8fr); gap: 24px; }
}
@media (max-width: 820px) {
  :root { --shell: calc(100vw - 28px); }
  .brand small { display: none; }
  .header-inner { min-height: 68px; }
  .primary-nav { top: 68px; }
  .hero, .page-hero, .split-layout, .intro-grid, .search-promo, .about-panel, .content-layout, .access-board, .two-col-note { grid-template-columns: 1fr; }
  .hero { padding-top: 44px; }
  .hero-media { order: -1; }
  .hero-media img { max-height: 420px; }
  .page-hero-media { order: -1; }
  .page-hero-media img { max-height: 360px; }
  .split-layout.reverse .split-copy, .split-layout.reverse .split-media { order: initial; }
  .magazine-grid { grid-template-columns: 1fr; }
  .magazine-card-large { grid-row: auto; }
  .steps { grid-template-columns: 1fr; }
  .side-panel { position: static; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-about { grid-column: 1 / -1; }
  .search-promo { padding: 28px; gap: 18px; }
  .article-cover { aspect-ratio: 1.45/1; }
}
@media (max-width: 600px) {
  .site-header .brand strong { font-size: 15px; }
  .brand img { width: 38px; height: 38px; }
  .header-inner { grid-template-columns: 1fr auto auto; }
  .search-open { padding: 8px 11px; }
  .menu-toggle { padding: 8px 11px; }
  .hero h1, .page-hero h1 { font-size: 40px; }
  .hero-facts, .feature-grid, .article-grid, .feedback-grid, .steps.vertical { grid-template-columns: 1fr; }
  .hero-actions { display: grid; }
  .button { width: 100%; }
  .section { padding: 46px 0; }
  .topic-row { grid-template-columns: 48px 1fr auto; gap: 10px; }
  .topic-row strong { font-size: 18px; }
  .topic-row small { line-height: 1.5; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-about { grid-column: auto; }
  .footer-bottom { flex-direction: column; }
  .callout { align-items: stretch; flex-direction: column; padding: 28px; }
  .inline-search, .search-row { display: grid; grid-template-columns: 1fr; }
  .search-row button, .inline-search button { min-height: 44px; }
  .guide-row { grid-template-columns: 42px 1fr; }
  .guide-row .row-arrow { display: none; }
  .article-header { text-align: left; }
  .search-dialog { padding: 28px 20px; }
}
@media (max-width: 390px) {
  :root { --shell: calc(100vw - 22px); }
  .header-inner { gap: 7px; }
  .brand span { max-width: 120px; }
  .brand strong { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
  .search-open { font-size: 13px; }
  .menu-toggle { font-size: 13px; }
  .primary-nav { left: 10px; right: 10px; grid-template-columns: 1fr!important; }
  .hero h1, .page-hero h1 { font-size: 36px; }
}