:root {
  --bg: #05080f;
  --bg-soft: #0a0f1a;
  --surface: #101827;
  --surface-strong: #152033;
  --ink: #f4f7fb;
  --ink-soft: #c7d1de;
  --muted: #98a7ba;
  --gold: #c9a24b;
  --gold-hi: #f1d98c;
  --green: #69c39b;
  --coral: #e58a6c;
  --blue: #73a7f5;
  --line: rgba(255, 255, 255, 0.1);
  --line-gold: rgba(201, 162, 75, 0.34);
  --sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --serif: Georgia, "Times New Roman", serif;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  min-width: 320px;
  overflow-x: hidden;
  color: var(--ink);
  background: var(--bg);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}

.wrap {
  width: 100%;
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 24px;
}

.site-header {
  border-bottom: 1px solid var(--line-gold);
  background: rgba(5, 8, 15, 0.96);
}

.header-inner {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  min-width: 0;
}

.brand img {
  width: 42px;
  height: 42px;
  border-radius: 8px;
  flex: none;
}

.brand b,
.brand small {
  display: block;
  white-space: nowrap;
}

.brand b {
  color: #fff;
  font-size: 17px;
  line-height: 1.3;
}

.brand small {
  color: var(--gold-hi);
  font-family: var(--serif);
  font-size: 10px;
  line-height: 1.3;
  letter-spacing: 0.22em;
  text-transform: uppercase;
}

.header-nav {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 6px;
  flex-wrap: wrap;
}

.header-nav a {
  min-height: 36px;
  display: inline-flex;
  align-items: center;
  padding: 6px 12px;
  border: 1px solid transparent;
  border-radius: 6px;
  color: var(--ink-soft);
  font-size: 13px;
}

.header-nav a:hover,
.header-nav a[aria-current="page"] {
  border-color: var(--line-gold);
  color: #fff;
  background: rgba(201, 162, 75, 0.07);
}

.breadcrumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  padding-top: 28px;
  color: var(--muted);
  font-size: 13px;
}

.breadcrumbs a:hover {
  color: var(--gold-hi);
}

.breadcrumbs span[aria-current="page"] {
  color: var(--ink-soft);
}

.listing-hero,
.article-hero {
  position: relative;
  overflow: hidden;
  background: var(--bg);
}

.listing-hero::after,
.article-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: linear-gradient(to bottom, #000, transparent 88%);
}

.listing-hero .wrap,
.article-hero .wrap {
  position: relative;
  z-index: 1;
}

.listing-intro {
  max-width: 820px;
  padding: 76px 0 86px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--gold-hi);
  font-size: 12px;
  font-weight: 700;
}

.eyebrow::before {
  content: "";
  width: 24px;
  height: 1px;
  background: var(--gold);
}

h1,
h2,
h3 {
  color: #fff;
  font-weight: 700;
  letter-spacing: 0;
  overflow-wrap: anywhere;
}

.listing-intro h1 {
  margin-top: 18px;
  font-size: 44px;
  line-height: 1.2;
}

.listing-intro .lead {
  max-width: 760px;
  margin-top: 22px;
  color: var(--ink-soft);
  font-size: 18px;
}

.identity-note {
  margin-top: 24px;
  padding-left: 15px;
  border-left: 2px solid var(--gold);
  color: var(--muted);
  font-size: 14px;
}

.guide-listing {
  padding: 72px 0 84px;
  border-top: 1px solid var(--line-gold);
  background: var(--bg-soft);
}

.section-heading {
  max-width: 720px;
  margin-bottom: 32px;
}

.section-heading h2 {
  font-size: 28px;
  line-height: 1.3;
}

.section-heading p {
  margin-top: 10px;
  color: var(--muted);
}

.guide-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.guide-card {
  min-height: 300px;
  display: flex;
  flex-direction: column;
  padding: 26px;
  border: 1px solid var(--line);
  border-top-color: var(--line-gold);
  border-radius: 6px;
  background: var(--surface);
  transition: transform 0.18s ease, border-color 0.18s ease, background 0.18s ease;
}

.guide-card:hover {
  transform: translateY(-2px);
  border-color: rgba(201, 162, 75, 0.54);
  background: var(--surface-strong);
}

.guide-card .category {
  color: var(--gold-hi);
  font-size: 12px;
  font-weight: 700;
}

.guide-card h2 {
  margin-top: 12px;
  font-size: 22px;
  line-height: 1.42;
}

.guide-card p {
  margin-top: 14px;
  color: var(--muted);
  font-size: 14px;
  flex: 1;
}

.guide-card .meta {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  color: var(--ink-soft);
  font-size: 13px;
}

.guide-card .read-more {
  display: inline-flex;
  align-items: center;
  margin-top: 14px;
  color: var(--gold-hi);
  font-size: 14px;
  font-weight: 700;
}

.principles {
  padding: 72px 0;
  border-top: 1px solid var(--line-gold);
  background: var(--bg);
}

.principle-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}

.principle {
  padding-left: 18px;
  border-left: 2px solid var(--gold);
}

.principle b {
  display: block;
  color: #fff;
  font-size: 16px;
}

.principle span {
  display: block;
  margin-top: 7px;
  color: var(--muted);
  font-size: 14px;
}

.article-heading {
  max-width: 900px;
  padding: 54px 0 72px;
}

.article-heading h1 {
  margin-top: 18px;
  font-size: 42px;
  line-height: 1.25;
}

.article-deck {
  max-width: 790px;
  margin-top: 22px;
  color: var(--ink-soft);
  font-size: 18px;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin-top: 24px;
  color: var(--muted);
  font-size: 13px;
}

.article-main {
  border-top: 1px solid var(--line-gold);
  background: var(--bg-soft);
}

.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 760px) minmax(220px, 280px);
  justify-content: space-between;
  gap: 64px;
  padding-top: 62px;
  padding-bottom: 84px;
}

.article-body {
  min-width: 0;
}

.article-body > * + * {
  margin-top: 20px;
}

.article-body h2 {
  margin-top: 52px;
  padding-top: 8px;
  font-size: 27px;
  line-height: 1.35;
}

.article-body h3 {
  margin-top: 30px;
  font-size: 19px;
  line-height: 1.45;
}

.article-body p,
.article-body li {
  color: var(--ink-soft);
}

.article-body strong {
  color: #fff;
}

.article-body a {
  color: var(--gold-hi);
  text-decoration: underline;
  text-decoration-color: rgba(241, 217, 140, 0.48);
  text-underline-offset: 3px;
}

.direct-answer {
  padding: 22px 24px;
  border: 1px solid var(--line-gold);
  border-left: 3px solid var(--gold);
  border-radius: 6px;
  background: rgba(201, 162, 75, 0.07);
}

.direct-answer b {
  display: block;
  margin-bottom: 8px;
  color: var(--gold-hi);
  font-size: 13px;
}

.direct-answer p {
  color: #eef3f9;
  font-size: 17px;
}

.decision-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.decision-item {
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--surface);
}

.decision-item h3 {
  margin-top: 0;
  font-size: 18px;
}

.decision-item p {
  margin-top: 8px;
  font-size: 14px;
}

.decision-item .fit {
  display: block;
  margin-top: 12px;
  color: var(--green);
  font-size: 13px;
  font-weight: 700;
}

.check-steps,
.boundary-list,
.responsibility-list {
  list-style: none;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

.check-steps li,
.boundary-list li,
.responsibility-list li {
  position: relative;
  padding: 18px 0 18px 46px;
  border-bottom: 1px solid var(--line);
}

.check-steps li::before {
  content: attr(data-step);
  position: absolute;
  left: 0;
  top: 18px;
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line-gold);
  border-radius: 50%;
  color: var(--gold-hi);
  font-family: var(--serif);
  font-size: 13px;
}

.boundary-list li::before,
.responsibility-list li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 29px;
  width: 18px;
  height: 2px;
  background: var(--gold);
}

.check-steps b,
.boundary-list b,
.responsibility-list b {
  display: block;
  color: #fff;
}

.check-steps span,
.boundary-list span,
.responsibility-list span {
  display: block;
  margin-top: 4px;
  color: var(--muted);
  font-size: 14px;
}

.warning {
  padding: 18px 20px;
  border-left: 3px solid var(--coral);
  background: rgba(229, 138, 108, 0.08);
  color: var(--ink-soft);
}

.article-cta {
  margin-top: 48px;
  padding: 28px;
  border: 1px solid var(--line-gold);
  border-radius: 6px;
  background: var(--surface);
}

.article-cta h2 {
  margin-top: 0;
  padding-top: 0;
  font-size: 22px;
}

.article-cta p {
  margin-top: 9px;
  color: var(--muted);
}

.cta-button {
  min-height: 46px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-top: 18px;
  padding: 10px 20px;
  border-radius: 6px;
  background: linear-gradient(180deg, var(--gold-hi), var(--gold));
  color: #211a0a !important;
  font-size: 14px;
  font-weight: 800;
  text-decoration: none !important;
}

.article-aside {
  align-self: start;
  position: sticky;
  top: 22px;
  padding-left: 20px;
  border-left: 1px solid var(--line-gold);
}

.article-aside h2 {
  font-size: 15px;
}

.article-aside ul {
  list-style: none;
  margin-top: 14px;
}

.article-aside li + li {
  margin-top: 10px;
}

.article-aside a {
  color: var(--muted);
  font-size: 13px;
}

.article-aside a:hover {
  color: var(--gold-hi);
}

.source-list {
  list-style: none;
  border-top: 1px solid var(--line);
}

.source-list li {
  padding: 15px 0;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
}

.source-list a {
  display: inline;
}

.source-list small {
  display: block;
  margin-top: 4px;
  color: var(--muted);
  font-size: 12px;
}

.faq-list {
  border-top: 1px solid var(--line);
}

.faq-item {
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}

.faq-item h3 {
  margin-top: 0;
  font-size: 18px;
}

.faq-item p {
  margin-top: 8px;
  color: var(--muted);
}

.related-guides {
  padding-top: 20px;
}

.related-guides ul {
  list-style: none;
  border-top: 1px solid var(--line);
}

.related-guides li {
  border-bottom: 1px solid var(--line);
}

.related-guides a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 16px 0;
  color: var(--ink-soft);
  text-decoration: none;
}

.related-guides a:hover {
  color: var(--gold-hi);
}

.site-footer {
  padding: 38px 0 44px;
  border-top: 1px solid var(--line-gold);
  background: var(--bg);
  color: var(--muted);
  text-align: center;
  font-size: 13px;
}

.site-footer strong {
  color: #fff;
}

.site-footer a {
  color: var(--gold-hi);
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 8px 18px;
  flex-wrap: wrap;
  margin: 10px 0;
}

.footer-note {
  max-width: 760px;
  margin: 0 auto;
}

@media (max-width: 900px) {
  .article-layout {
    grid-template-columns: 1fr;
    gap: 46px;
  }

  .article-aside {
    position: static;
    padding-left: 0;
    padding-top: 24px;
    border-left: 0;
    border-top: 1px solid var(--line-gold);
  }

  .principle-list {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 700px) {
  .wrap {
    padding: 0 18px;
  }

  .header-inner {
    align-items: flex-start;
    flex-direction: column;
    gap: 12px;
    padding-top: 16px;
    padding-bottom: 16px;
  }

  .header-nav {
    width: 100%;
    justify-content: flex-start;
  }

  .header-nav a {
    min-height: 34px;
    padding: 5px 10px;
    font-size: 12px;
  }

  .listing-intro {
    padding: 54px 0 62px;
  }

  .listing-intro h1,
  .article-heading h1 {
    font-size: 34px;
  }

  .listing-intro .lead,
  .article-deck {
    font-size: 16px;
  }

  .guide-listing,
  .principles {
    padding: 56px 0 62px;
  }

  .guide-grid,
  .decision-grid {
    grid-template-columns: 1fr;
  }

  .guide-card {
    min-height: 0;
  }

  .article-heading {
    padding: 42px 0 54px;
  }

  .article-layout {
    padding-top: 46px;
    padding-bottom: 64px;
  }

  .article-body h2 {
    margin-top: 42px;
    font-size: 24px;
  }

  .direct-answer {
    padding: 18px;
  }

  .article-cta {
    padding: 22px 18px;
  }

  .cta-button {
    width: 100%;
  }
}

@media (max-width: 390px) {
  .listing-intro h1,
  .article-heading h1 {
    font-size: 31px;
  }

  .brand b {
    font-size: 16px;
  }

  .brand small {
    font-size: 9px;
  }
}