:root {
  --ink: #10233c;
  --ink-soft: #29445f;
  --brick: #a04436;
  --brick-deep: #713127;
  --cream: #f6f0e3;
  --paper: #fffaf0;
  --sand: #e8dcc7;
  --line: #cfbea2;
  --white: #ffffff;
  --success: #40614d;
  --shadow: 0 18px 50px rgba(16, 35, 60, 0.1);
  --radius: 18px;
  --content: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(rgba(16, 35, 60, 0.035) 1px, transparent 1px),
    var(--cream);
  background-size: 100% 28px;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 17px;
  line-height: 1.75;
  text-rendering: optimizeLegibility;
}

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

a {
  color: var(--brick-deep);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
}

a:hover {
  color: var(--brick);
}

a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 3px solid #d78976;
  outline-offset: 3px;
  border-radius: 4px;
}

p,
ul,
ol {
  margin-top: 0;
}

h1,
h2,
h3 {
  margin: 0 0 0.75em;
  color: var(--ink);
  font-family: Georgia, "Noto Serif SC", "Songti SC", "SimSun", serif;
  line-height: 1.25;
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(2.45rem, 7vw, 5.7rem);
  max-width: 12ch;
}

h2 {
  font-size: clamp(1.65rem, 4vw, 2.8rem);
}

h3 {
  font-size: 1.22rem;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 100;
  padding: 0.65rem 1rem;
  color: var(--white);
  background: var(--ink);
  transform: translateY(-160%);
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid rgba(207, 190, 162, 0.8);
  background: rgba(246, 240, 227, 0.96);
  backdrop-filter: blur(14px);
}

.header-inner,
.footer-inner,
.shell {
  width: min(calc(100% - 32px), var(--content));
  margin-inline: auto;
}

.header-inner {
  display: flex;
  min-height: 76px;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--ink);
  font-weight: 800;
  text-decoration: none;
  white-space: nowrap;
}

.brand-mark {
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  border-radius: 50% 50% 44% 56%;
  color: var(--cream);
  background: var(--brick);
  box-shadow: inset 0 0 0 5px rgba(255, 255, 255, 0.12);
  font-family: Georgia, serif;
}

.main-nav {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.2rem;
  flex-wrap: wrap;
}

.main-nav a {
  padding: 0.48rem 0.68rem;
  border-radius: 999px;
  color: var(--ink);
  font-size: 0.89rem;
  font-weight: 700;
  text-decoration: none;
}

.main-nav a:hover,
.main-nav a[aria-current="page"] {
  color: var(--white);
  background: var(--ink);
}

.adult-strip {
  color: var(--cream);
  background: var(--ink);
}

.adult-strip .shell {
  display: flex;
  min-height: 34px;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  font-size: 0.78rem;
  letter-spacing: 0.06em;
}

.adult-strip strong {
  color: #f4b7a9;
}

main {
  min-height: 70vh;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(340px, 0.95fr);
  min-height: 690px;
  align-items: center;
  gap: clamp(2rem, 6vw, 5rem);
  padding-block: clamp(4rem, 10vw, 8rem);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  margin-bottom: 1rem;
  color: var(--brick-deep);
  font-size: 0.82rem;
  font-weight: 900;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.eyebrow::before {
  width: 28px;
  height: 3px;
  content: "";
  background: var(--brick);
}

.hero-lead {
  max-width: 42rem;
  margin-bottom: 1.6rem;
  color: var(--ink-soft);
  font-size: clamp(1.08rem, 2vw, 1.28rem);
}

.hero-actions {
  display: flex;
  gap: 0.85rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}

.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  padding: 0.72rem 1.15rem;
  border: 1px solid var(--ink);
  border-radius: 3px;
  font-weight: 850;
  text-decoration: none;
}

.button-primary {
  color: var(--white);
  background: var(--brick);
  border-color: var(--brick);
}

.button-primary:hover {
  color: var(--white);
  background: var(--brick-deep);
}

.button-secondary {
  color: var(--ink);
  background: transparent;
}

.hero-figure {
  position: relative;
  margin: 0;
}

.hero-figure::before {
  position: absolute;
  inset: -16px 18px 18px -16px;
  z-index: -1;
  border: 1px solid var(--brick);
  content: "";
}

.hero-figure img,
.feature-image img {
  width: 100%;
  border: 1px solid var(--ink);
  background: var(--ink);
  box-shadow: var(--shadow);
}

.hero-figure figcaption,
.feature-image figcaption {
  margin-top: 0.75rem;
  color: var(--ink-soft);
  font-size: 0.78rem;
}

.fact-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  max-width: 620px;
  border: 1px solid var(--line);
  background: var(--line);
}

.fact {
  padding: 0.75rem 0.9rem;
  background: var(--paper);
}

.fact strong,
.fact span {
  display: block;
}

.fact strong {
  color: var(--brick-deep);
  font-family: Georgia, serif;
  font-size: 1.35rem;
}

.fact span {
  color: var(--ink-soft);
  font-size: 0.74rem;
}

.section {
  padding-block: clamp(4rem, 8vw, 7rem);
}

.section-ink {
  color: var(--cream);
  background: var(--ink);
}

.section-ink h2,
.section-ink h3,
.section-ink a {
  color: var(--cream);
}

.section-ink .section-intro,
.section-ink p {
  color: #d8e0e8;
}

.section-brick {
  color: var(--white);
  background: var(--brick-deep);
}

.section-brick h2,
.section-brick h3,
.section-brick a,
.section-brick p {
  color: var(--white);
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(0, 0.65fr) minmax(280px, 0.35fr);
  align-items: end;
  gap: 2rem;
  margin-bottom: 2.4rem;
}

.section-intro {
  max-width: 52rem;
  color: var(--ink-soft);
}

.method-grid,
.channel-grid,
.article-grid,
.tool-grid,
.tag-grid,
.author-grid {
  display: grid;
  gap: 1rem;
}

.method-grid {
  grid-template-columns: repeat(4, 1fr);
}

.channel-grid {
  grid-template-columns: repeat(3, 1fr);
}

.article-grid {
  grid-template-columns: repeat(3, 1fr);
}

.tool-grid {
  grid-template-columns: repeat(2, 1fr);
}

.tag-grid {
  grid-template-columns: repeat(5, 1fr);
}

.author-grid {
  grid-template-columns: repeat(4, 1fr);
}

.method-card,
.channel-card,
.article-card,
.tool-card,
.tag-card,
.author-card {
  position: relative;
  min-height: 100%;
  padding: 1.35rem;
  border: 1px solid var(--line);
  background: var(--paper);
  box-shadow: 0 8px 0 rgba(16, 35, 60, 0.04);
}

.channel-card {
  display: flex;
  min-height: 260px;
  flex-direction: column;
  justify-content: space-between;
}

.channel-card:nth-child(3n + 2) {
  transform: translateY(18px);
}

.channel-card .index,
.method-card .index {
  color: var(--brick);
  font-family: Georgia, serif;
  font-size: 2rem;
  font-weight: 800;
}

.card-link {
  font-weight: 850;
}

.article-card {
  display: flex;
  min-height: 310px;
  flex-direction: column;
}

.article-card h3 {
  font-size: 1.35rem;
}

.article-card p {
  color: var(--ink-soft);
}

.article-meta {
  display: flex;
  margin-top: auto;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
  justify-content: space-between;
  gap: 0.75rem;
  color: var(--ink-soft);
  font-size: 0.78rem;
}

.editorial-note {
  display: grid;
  grid-template-columns: minmax(220px, 0.34fr) minmax(0, 0.66fr);
  gap: 2rem;
  padding: clamp(1.5rem, 4vw, 3rem);
  border-left: 7px solid var(--brick);
  background: var(--paper);
  box-shadow: var(--shadow);
}

.editorial-note .stamp {
  color: var(--brick-deep);
  font-family: Georgia, serif;
  font-size: clamp(2rem, 5vw, 4rem);
  font-weight: 800;
  line-height: 1;
}

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

details {
  border-bottom: 1px solid var(--line);
}

summary {
  padding: 1.25rem 2.5rem 1.25rem 0;
  cursor: pointer;
  font-weight: 850;
}

details p {
  max-width: 56rem;
  padding-bottom: 1.2rem;
  color: var(--ink-soft);
}

.comment-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.comment {
  padding: 1.3rem;
  border: 1px dashed rgba(255, 255, 255, 0.55);
}

.comment strong,
.comment span {
  display: block;
}

.comment span {
  margin-top: 0.65rem;
  color: #f2cdc6;
  font-size: 0.78rem;
}

.page-hero {
  padding-block: clamp(4rem, 9vw, 7rem);
  border-bottom: 1px solid var(--line);
}

.page-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.62fr) minmax(320px, 0.38fr);
  align-items: center;
  gap: 3rem;
}

.page-hero h1 {
  font-size: clamp(2.35rem, 6vw, 4.8rem);
}

.page-deck {
  max-width: 48rem;
  color: var(--ink-soft);
  font-size: 1.12rem;
}

.breadcrumbs {
  margin-bottom: 1.2rem;
  color: var(--ink-soft);
  font-size: 0.82rem;
}

.breadcrumbs a {
  color: inherit;
}

.list-shell {
  display: grid;
  grid-template-columns: minmax(200px, 0.25fr) minmax(0, 0.75fr);
  gap: clamp(2rem, 6vw, 5rem);
}

.list-aside {
  align-self: start;
  padding: 1.2rem;
  border-top: 4px solid var(--brick);
  background: var(--paper);
}

.list-aside ul {
  padding-left: 1.2rem;
}

.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.7fr) minmax(240px, 0.3fr);
  gap: clamp(2rem, 7vw, 5rem);
}

.article-body {
  max-width: 780px;
}

.article-body > p:first-of-type {
  color: var(--ink-soft);
  font-size: 1.15rem;
}

.article-body h2 {
  margin-top: 2.3em;
  padding-top: 0.5em;
  border-top: 1px solid var(--line);
}

.article-side {
  align-self: start;
}

.sticky-card {
  position: sticky;
  top: 132px;
  padding: 1.25rem;
  border: 1px solid var(--line);
  background: var(--paper);
}

.meta-list {
  display: grid;
  gap: 0.75rem;
  margin: 0;
}

.meta-list div {
  display: grid;
  grid-template-columns: 5.5rem 1fr;
  gap: 0.5rem;
  padding-bottom: 0.7rem;
  border-bottom: 1px solid var(--sand);
}

.meta-list dt {
  color: var(--ink-soft);
  font-size: 0.8rem;
}

.meta-list dd {
  margin: 0;
  font-weight: 750;
}

.checklist {
  padding: 1.4rem 1.4rem 1.4rem 3rem;
  border: 1px solid var(--brick);
  background: #fff7ed;
}

.checklist li {
  margin-bottom: 0.5rem;
}

.tag-list {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.tag-list a,
.tag-pill {
  display: inline-flex;
  padding: 0.28rem 0.65rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--ink);
  background: var(--paper);
  font-size: 0.76rem;
  font-weight: 800;
  text-decoration: none;
}

.source-status {
  margin-top: 2rem;
  padding: 1rem;
  border-left: 4px solid var(--success);
  background: #eef4ea;
  color: #274432;
}

.process {
  counter-reset: step;
  display: grid;
  gap: 1rem;
  padding: 0;
  list-style: none;
}

.process li {
  position: relative;
  min-height: 100px;
  padding: 1.2rem 1.2rem 1.2rem 5rem;
  border: 1px solid var(--line);
  background: var(--paper);
}

.process li::before {
  position: absolute;
  top: 1rem;
  left: 1rem;
  display: grid;
  width: 2.8rem;
  height: 2.8rem;
  place-items: center;
  border-radius: 50%;
  color: var(--white);
  background: var(--brick);
  content: counter(step, decimal-leading-zero);
  counter-increment: step;
  font-family: Georgia, serif;
  font-weight: 800;
}

.notice {
  padding: 1.1rem 1.25rem;
  border: 1px solid var(--line);
  background: #fff5df;
}

.release-status {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  border: 1px solid var(--line);
  background: var(--line);
}

.release-status div {
  padding: 1.2rem;
  background: var(--paper);
}

.release-status strong,
.release-status span {
  display: block;
}

.release-status span {
  color: var(--brick-deep);
  font-weight: 800;
}

.empty-state {
  padding: 4rem 1.5rem;
  border: 1px dashed var(--line);
  text-align: center;
}

.site-footer {
  padding-block: 3.5rem;
  color: #d9e2eb;
  background: #0b192a;
}

.footer-inner {
  display: grid;
  grid-template-columns: minmax(220px, 0.4fr) minmax(0, 0.6fr);
  gap: 3rem;
}

.footer-brand {
  color: var(--white);
  font-family: Georgia, serif;
  font-size: 1.35rem;
  font-weight: 800;
}

.footer-note {
  max-width: 32rem;
  color: #afbfce;
  font-size: 0.85rem;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.6rem 1rem;
}

.footer-links a {
  color: #d9e2eb;
  font-size: 0.84rem;
}

.copyright {
  grid-column: 1 / -1;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.14);
  color: #8499ac;
  font-size: 0.76rem;
}

@media (max-width: 980px) {
  .site-header {
    position: static;
  }

  .header-inner {
    align-items: flex-start;
    flex-direction: column;
    padding-block: 1rem;
  }

  .main-nav {
    justify-content: flex-start;
  }

  .hero,
  .page-hero-grid,
  .article-layout,
  .list-shell,
  .editorial-note,
  .footer-inner {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  .method-grid,
  .author-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .channel-grid,
  .article-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .tag-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .sticky-card {
    position: static;
  }
}

@media (max-width: 680px) {
  body {
    font-size: 16px;
  }

  .adult-strip .shell {
    align-items: flex-start;
    flex-direction: column;
    gap: 0;
    padding-block: 0.45rem;
  }

  .main-nav {
    width: 100%;
    overflow-x: auto;
    flex-wrap: nowrap;
    padding-bottom: 0.35rem;
  }

  .hero {
    grid-template-columns: 1fr;
    padding-top: 3.2rem;
  }

  .fact-row,
  .method-grid,
  .channel-grid,
  .article-grid,
  .tool-grid,
  .tag-grid,
  .author-grid,
  .comment-grid,
  .release-status,
  .section-heading {
    grid-template-columns: 1fr;
  }

  .channel-card:nth-child(3n + 2) {
    transform: none;
  }

  .page-hero-grid {
    gap: 1.5rem;
  }

  .article-meta {
    align-items: flex-start;
    flex-direction: column;
  }

  .footer-links {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

@media print {
  .site-header,
  .adult-strip,
  .site-footer,
  .hero-actions {
    display: none;
  }

  body {
    color: #000;
    background: #fff;
    font-size: 11pt;
  }

  a {
    color: #000;
  }

  .section,
  .page-hero {
    padding-block: 1rem;
  }
}