@import url("https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700&family=Noto+Sans+SC:wght@400;500;600;700&family=Space+Mono:wght@400;700&display=swap");

:root {
  --paper: #f5f1e8;
  --paper-deep: #e9e4d9;
  --ink: #1b2423;
  --muted: #68716d;
  --line: #cdd1c8;
  --green: #1fc66e;
  --green-dark: #0f6d43;
  --white: #fffefa;
  --shadow: 0 22px 60px rgba(27, 36, 35, .1);
  --radius-lg: 28px;
  --radius-md: 14px;
  --max-width: 1180px;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Noto Sans SC", "PingFang SC", sans-serif;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
}

.brand-en,
.heading-en,
.card-en,
.summary-en,
.bilingual-copy,
.visual-title-en,
.visual-caption-en {
  font-family: "DM Sans", "Noto Sans SC", sans-serif;
}

.brand-en {
  color: var(--muted);
  font-size: 11px;
  font-weight: 500;
}

.heading-en {
  color: var(--muted);
  font-family: "DM Sans", sans-serif;
  font-size: .36em;
  font-weight: 500;
  letter-spacing: -.01em;
}

.card-en {
  color: var(--muted);
  font-family: "DM Sans", sans-serif;
  font-size: .62em;
  font-weight: 500;
  letter-spacing: 0;
}

.bilingual-copy {
  color: var(--muted);
  font-size: 12px;
  line-height: 1.55;
}

.hero-copy > .bilingual-copy {
  max-width: 480px;
  margin: -21px 0 25px;
}

.strip-copy > .bilingual-copy,
.section-heading > .bilingual-copy {
  margin: -10px 0 0;
}

.visual-title-en,
.visual-caption-en {
  color: var(--muted);
  font-family: "DM Sans", sans-serif;
  font-size: .34em;
  font-weight: 500;
  letter-spacing: 0;
}

.visual-title-en {
  display: block;
  margin-top: 8px;
}

.visual-caption-en {
  font-size: 1em;
}

.summary-en {
  margin-left: auto;
  color: var(--muted);
  font-family: "DM Sans", sans-serif;
  font-size: 12px;
  font-weight: 500;
}

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

a:focus-visible,
summary:focus-visible {
  outline: 3px solid var(--green-dark);
  outline-offset: 5px;
}

.section-shell,
.site-header {
  width: min(calc(100% - 48px), var(--max-width));
  margin-inline: auto;
}

.site-header {
  min-height: 90px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .02em;
}

.brand-mark {
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  border: 1px solid var(--ink);
  border-radius: 50%;
  font-family: "Space Mono", monospace;
  font-size: 15px;
}

.top-nav {
  display: flex;
  gap: 28px;
  color: var(--muted);
  font-size: 13px;
}

.top-nav a,
.text-link,
.footer-links a {
  transition: color .2s ease;
}

.top-nav a:hover,
.text-link:hover,
.footer-links a:hover {
  color: var(--green-dark);
}

.hero {
  min-height: 635px;
  display: grid;
  grid-template-columns: minmax(0, .92fr) minmax(360px, 1.08fr);
  gap: clamp(40px, 8vw, 118px);
  align-items: center;
  padding-block: 58px 92px;
}

.eyebrow {
  margin: 0 0 18px;
  color: var(--green-dark);
  font-family: "Space Mono", monospace;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
}

h1, h2, h3, p { margin-top: 0; }

h1, h2 {
  letter-spacing: -.04em;
  line-height: 1.08;
}

h1 {
  max-width: 600px;
  margin-bottom: 25px;
  font-size: clamp(45px, 6vw, 78px);
  font-weight: 600;
}

h1 em {
  color: var(--green-dark);
  font-style: normal;
}

.hero-description {
  max-width: 480px;
  margin-bottom: 31px;
  color: var(--muted);
  font-size: 16px;
}

.search-intent {
  max-width: 480px;
  margin: -12px 0 27px;
  color: var(--green-dark);
  font-size: 12px;
}

.hero-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 23px;
  margin-bottom: 27px;
}

.button {
  min-height: 52px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  padding: 12px 22px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 700;
  transition: transform .2s ease, box-shadow .2s ease, background-color .2s ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button-primary {
  background: var(--green);
  color: var(--ink);
  box-shadow: 0 10px 24px rgba(31, 198, 110, .24);
}

.button-primary:hover { background: #35d67f; }

.button-dark {
  background: var(--ink);
  color: var(--white);
}

.button-dark:hover { background: var(--green-dark); }

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  border-bottom: 1px solid currentColor;
  padding-bottom: 3px;
  color: var(--ink);
  font-size: 13px;
  font-weight: 600;
}

.notice-line {
  display: flex;
  align-items: center;
  gap: 9px;
  margin: 0;
  color: var(--muted);
  font-size: 12px;
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 5px rgba(31, 198, 110, .14);
}

.hero-visual {
  position: relative;
  min-height: 445px;
  display: grid;
  place-items: center;
}

.visual-window {
  width: min(100%, 505px);
  overflow: hidden;
  border: 1px solid var(--ink);
  border-radius: var(--radius-lg);
  background: var(--white);
  box-shadow: var(--shadow);
  transform: rotate(2.3deg);
  animation: float-in .7s ease-out both;
}

.window-bar,
.visual-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 19px;
  color: var(--muted);
  font-family: "Space Mono", monospace;
  font-size: 9px;
  letter-spacing: .06em;
  text-transform: uppercase;
}

.window-bar { border-bottom: 1px solid var(--line); }
.visual-footer { border-top: 1px solid var(--line); }

.window-dots {
  display: inline-flex;
  gap: 5px;
}

.window-dots i {
  width: 7px;
  height: 7px;
  display: block;
  border: 1px solid var(--muted);
  border-radius: 50%;
}

.window-status { color: var(--green-dark); }

.visual-body {
  min-height: 335px;
  position: relative;
  overflow: hidden;
  padding: 44px 47px;
  background:
    linear-gradient(90deg, rgba(27, 36, 35, .055) 1px, transparent 1px) 0 0 / 42px 42px,
    linear-gradient(rgba(27, 36, 35, .055) 1px, transparent 1px) 0 0 / 42px 42px,
    var(--paper-deep);
}

.visual-body::after {
  content: "";
  position: absolute;
  right: -75px;
  bottom: -96px;
  width: 260px;
  height: 260px;
  border: 1px solid rgba(15, 109, 67, .22);
  border-radius: 50%;
}

.visual-kicker {
  color: var(--green-dark);
  font-family: "Space Mono", monospace;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .1em;
}

.visual-symbol {
  width: 110px;
  height: 110px;
  position: relative;
  display: grid;
  place-items: center;
  margin: 36px 0 18px;
  border: 1px solid var(--ink);
  border-radius: 50%;
  background: var(--green);
}

.symbol-ring {
  width: 75px;
  height: 75px;
  display: block;
  border: 1px solid rgba(27, 36, 35, .7);
  border-radius: 50%;
}

.symbol-wave {
  position: absolute;
  font-family: "Space Mono", monospace;
  font-size: 31px;
  transform: rotate(-44deg);
}

.visual-title {
  position: relative;
  z-index: 1;
  margin-bottom: 20px;
  font-size: 34px;
  font-weight: 600;
  letter-spacing: -.06em;
  line-height: 1.13;
}

.visual-rule {
  width: 160px;
  height: 1px;
  margin-bottom: 16px;
  background: var(--ink);
}

.visual-caption {
  position: relative;
  z-index: 1;
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.8;
}

.visual-note {
  position: absolute;
  color: var(--green-dark);
  font-family: "Space Mono", monospace;
  font-size: 10px;
  letter-spacing: .07em;
}

.note-top {
  top: 17px;
  right: 0;
}

.note-bottom {
  bottom: 16px;
  left: 0;
}

.download-strip {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 23px;
  padding: 25px 29px;
  border: 1px solid var(--ink);
  border-radius: var(--radius-md);
  background: var(--white);
}

.platform-icon {
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  border: 1px solid var(--ink);
  border-radius: 13px;
  background: #d6f8bd;
  font-family: "Space Mono", monospace;
  font-size: 26px;
}

.strip-copy .eyebrow { margin-bottom: 4px; }
.strip-copy h2 { margin-bottom: 3px; font-size: 22px; letter-spacing: -.03em; }
.strip-copy p { margin: 0; color: var(--muted); font-size: 13px; }
.strip-actions { display: flex; align-items: center; gap: 16px; }
.action-caption { color: var(--muted); font-size: 11px; white-space: nowrap; }

.steps-section { padding-block: 150px 118px; }

.trust-section { padding-block: 128px 0; }

.trust-panel {
  display: grid;
  grid-template-columns: minmax(260px, .82fr) minmax(0, 1.18fr);
  gap: 28px;
  padding: 30px;
  border: 1px solid var(--ink);
  border-radius: var(--radius-md);
  background: var(--white);
  box-shadow: var(--shadow);
}

.trust-meta {
  display: grid;
  gap: 12px;
}

.trust-meta div {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--paper);
}

.trust-meta span {
  display: block;
  margin-bottom: 8px;
  color: var(--green-dark);
  font-family: "Space Mono", monospace;
  font-size: 9px;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.trust-meta strong {
  color: var(--ink);
  font-size: 13px;
  font-weight: 600;
}

.trust-copy {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
}

.trust-copy h3 {
  margin-bottom: 13px;
  font-size: 25px;
  letter-spacing: -.03em;
}

.trust-copy p {
  max-width: 600px;
  color: var(--muted);
  font-size: 13px;
}

.trust-copy .button {
  margin-top: 12px;
}

.platform-section { padding-block: 128px 0; }

.keyword-section { padding-block: 128px 0; }

.blog-section { padding-block: 128px 0; }

.platform-grid,
.keyword-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 17px;
}

.platform-card,
.keyword-card {
  min-height: 275px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  padding: 29px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(255, 254, 250, .46);
}

.platform-card-featured {
  border-color: var(--ink);
  background: var(--white);
  box-shadow: var(--shadow);
}

.keyword-card {
  min-height: 238px;
}

.keyword-card-warning {
  border-color: rgba(15, 109, 67, .5);
  background: #f0faee;
}

.platform-label,
.keyword-label {
  color: var(--green-dark);
  font-family: "Space Mono", monospace;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .1em;
}

.platform-card h3,
.keyword-card h3 {
  margin: 57px 0 9px;
  font-size: 20px;
  letter-spacing: -.03em;
}

.keyword-card h3 {
  margin-top: 42px;
}

.platform-card p,
.keyword-card p {
  margin-bottom: 22px;
  color: var(--muted);
  font-size: 13px;
}

.platform-card .text-link { margin-top: auto; }

.topic-index {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: -18px 0 30px;
}

.topic-index a {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 7px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 254, 250, .52);
  color: var(--muted);
  font-size: 12px;
  transition: border-color .2s ease, color .2s ease, background-color .2s ease;
}

.topic-index a:hover {
  border-color: var(--green-dark);
  background: var(--white);
  color: var(--green-dark);
}

.article-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.article-card {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--white);
}

.article-card:target {
  border-color: var(--green-dark);
  box-shadow: 0 0 0 4px rgba(31, 198, 110, .14), var(--shadow);
}

.article-media {
  aspect-ratio: 5 / 3;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
}

.article-cover {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
}

.article-media span,
.article-media strong {
  font-family: "Space Mono", monospace;
  font-size: 11px;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.media-green { background: #c9f6cf; }
.media-cream { background: #f0e6d2; }
.media-dark { background: #1b2423; color: var(--white); }
.media-blue { background: #d8e8f8; }
.media-line {
  background:
    linear-gradient(135deg, rgba(27, 36, 35, .08) 25%, transparent 25%) 0 0 / 18px 18px,
    var(--white);
}
.media-warning { background: #f8e8bd; }

.article-body {
  padding: 22px;
}

.article-tag {
  display: inline-flex;
  margin-bottom: 18px;
  color: var(--green-dark);
  font-family: "Space Mono", monospace;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .08em;
}

.article-body h3 {
  margin-bottom: 10px;
  font-size: 19px;
  letter-spacing: -.03em;
  line-height: 1.32;
}

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

.article-read {
  display: inline-flex;
  margin: 2px 0 14px;
  color: var(--green-dark);
  font-size: 12px;
  font-weight: 700;
}

.article-read:hover {
  text-decoration: underline;
}

.article-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}

.article-links a {
  padding: 5px 9px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  font-size: 11px;
  transition: border-color .2s ease, color .2s ease;
}

.article-links a:hover {
  border-color: var(--green-dark);
  color: var(--green-dark);
}

.section-heading { max-width: 650px; margin-bottom: 46px; }
.section-heading h2,
.security-section h2,
.final-cta h2 { margin-bottom: 17px; font-size: clamp(32px, 4vw, 52px); }
.section-heading > p:last-child,
.security-intro > p:not(.eyebrow) { color: var(--muted); font-size: 15px; }

.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 17px;
}

.step-card {
  min-height: 290px;
  position: relative;
  padding: 29px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(255, 254, 250, .46);
}

.step-card-featured {
  border-color: var(--ink);
  background: var(--green);
  transform: translateY(-17px);
}

.step-number {
  color: var(--muted);
  font-family: "Space Mono", monospace;
  font-size: 11px;
}

.step-card-featured .step-number { color: var(--green-dark); }

.step-icon {
  width: 47px;
  height: 47px;
  display: grid;
  place-items: center;
  margin: 42px 0 25px;
  border: 1px solid currentColor;
  border-radius: 50%;
  font-family: "Space Mono", monospace;
  font-size: 19px;
}

.step-card h3 { margin-bottom: 9px; font-size: 20px; letter-spacing: -.03em; }
.step-card p { margin: 0; color: var(--muted); font-size: 13px; }
.step-card .bilingual-copy { margin: 7px 0 0; }
.step-card-featured p { color: rgba(27, 36, 35, .72); }

.security-section {
  display: grid;
  grid-template-columns: minmax(250px, .8fr) minmax(0, 1.2fr);
  gap: clamp(45px, 9vw, 140px);
  padding-block: 104px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.security-intro .text-link { margin-top: 25px; }
.security-list { border-top: 1px solid var(--line); }
.security-item {
  display: grid;
  grid-template-columns: 43px 1fr;
  gap: 18px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}

.security-index {
  color: var(--green-dark);
  font-family: "Space Mono", monospace;
  font-size: 13px;
  font-weight: 700;
}

.security-item h3 { margin-bottom: 3px; font-size: 17px; }
.security-item p { margin: 0; color: var(--muted); font-size: 13px; }
.security-item .bilingual-copy { margin-top: 5px; }

.faq-section { padding-block: 130px 112px; }
.compact-heading { margin-bottom: 29px; }
.compact-heading h2 { margin-bottom: 0; }
.faq-list { border-top: 1px solid var(--ink); }
.faq-list details { border-bottom: 1px solid var(--line); }
.faq-list summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 25px;
  padding: 23px 0;
  cursor: pointer;
  list-style: none;
  font-size: 15px;
  font-weight: 600;
}
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary span { color: var(--green-dark); font-family: "Space Mono", monospace; font-size: 18px; }
.faq-list details[open] summary span { transform: rotate(45deg); }
.faq-list details p { max-width: 700px; margin: -7px 0 23px; color: var(--muted); font-size: 13px; }
.faq-list details p.bilingual-copy { margin-top: -15px; }

.final-cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 25px;
  padding-block: 55px;
  border-top: 1px solid var(--ink);
}

.final-cta h2 { margin: 0; font-size: clamp(27px, 4vw, 47px); }
.final-cta .eyebrow { margin-bottom: 11px; }
.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 25px;
  padding-block: 28px 46px;
  color: var(--muted);
  font-size: 11px;
}
.site-footer p { margin: 0; }
.footer-links { display: flex; gap: 20px; }

.library-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 390px;
  align-items: end;
  gap: clamp(40px, 8vw, 110px);
  padding-block: 70px 78px;
}

.library-hero h1 {
  max-width: 720px;
  margin-bottom: 23px;
  font-size: clamp(42px, 6vw, 76px);
}

.library-lede {
  max-width: 690px;
  color: var(--muted);
  font-size: 16px;
}

.library-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}

.library-stats div {
  min-height: 130px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 17px;
  border: 1px solid var(--ink);
  border-radius: var(--radius-md);
  background: var(--white);
}

.library-stats strong {
  font-family: "DM Sans", sans-serif;
  font-size: 35px;
  line-height: 1;
}

.library-stats span {
  color: var(--muted);
  font-size: 11px;
}

.library-controls {
  display: grid;
  grid-template-columns: minmax(260px, 1fr) 210px 210px auto;
  align-items: end;
  gap: 13px;
  padding: 22px;
  border: 1px solid var(--ink);
  border-radius: var(--radius-md);
  background: var(--white);
}

.library-controls label {
  display: grid;
  gap: 7px;
  color: var(--muted);
  font-size: 11px;
}

.library-controls input,
.library-controls select {
  width: 100%;
  min-height: 45px;
  padding: 10px 13px;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: var(--paper);
  color: var(--ink);
  font: inherit;
  font-size: 13px;
}

.library-controls input:focus,
.library-controls select:focus {
  outline: 3px solid rgba(31, 198, 110, .2);
  border-color: var(--green-dark);
}

.library-reset {
  min-height: 45px;
  padding-inline: 17px;
  border: 0;
  cursor: pointer;
  font-size: 12px;
}

.published-section,
.topic-library-section {
  padding-top: 106px;
}

.published-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 11px;
}

.published-grid a {
  min-height: 80px;
  display: flex;
  align-items: flex-end;
  padding: 15px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--white);
  color: var(--green-dark);
  font-size: 13px;
  font-weight: 600;
  transition: transform .2s ease, border-color .2s ease;
}

.published-grid a:hover {
  border-color: var(--green-dark);
  transform: translateY(-2px);
}

.library-count {
  color: var(--muted);
  font-size: 13px;
}

.topic-card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 15px;
}

.topic-library-card {
  min-height: 270px;
  display: flex;
  flex-direction: column;
  padding: 21px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--white);
}

.topic-library-topline {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 22px;
  color: var(--green-dark);
  font-family: "Space Mono", monospace;
  font-size: 9px;
  letter-spacing: .05em;
  text-transform: uppercase;
}

.topic-library-topline strong {
  color: var(--muted);
  font-family: "DM Sans", sans-serif;
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0;
  text-transform: none;
}

.topic-library-card h3 {
  margin-bottom: 8px;
  font-size: 17px;
  line-height: 1.38;
}

.topic-library-card p {
  margin-bottom: 10px;
  color: var(--muted);
  font-size: 12px;
}

.topic-library-card .topic-primary {
  color: var(--green-dark);
  font-family: "Space Mono", monospace;
  font-size: 10px;
}

.topic-library-links {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-top: auto;
  padding-top: 13px;
}

.topic-library-links a {
  color: var(--green-dark);
  font-size: 11px;
}

.topic-library-links a:hover {
  text-decoration: underline;
}

.pagination {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  justify-content: center;
  padding-top: 31px;
}

.pagination button {
  min-width: 35px;
  min-height: 35px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  color: var(--muted);
  cursor: pointer;
  font: inherit;
  font-size: 12px;
}

.pagination button:hover,
.pagination button.is-active {
  border-color: var(--green-dark);
  background: var(--green);
  color: var(--ink);
}

.empty-state {
  grid-column: 1 / -1;
  padding: 45px;
  border: 1px dashed var(--line);
  color: var(--muted);
  text-align: center;
}

.article-detail {
  padding-block: 42px 120px;
}

.back-link {
  display: inline-flex;
  margin-bottom: 38px;
  color: var(--muted);
  font-size: 13px;
}

.back-link:hover {
  color: var(--green-dark);
}

.article-detail-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(360px, .82fr);
  align-items: center;
  gap: clamp(42px, 8vw, 110px);
  padding-bottom: 80px;
  border-bottom: 1px solid var(--line);
}

.article-detail-hero h1 {
  max-width: 700px;
  margin-bottom: 25px;
  font-size: clamp(38px, 5vw, 66px);
}

.article-lede {
  max-width: 660px;
  margin-bottom: 28px;
  color: var(--muted);
  font-size: 16px;
}

.article-meta-block {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: -12px 0 26px;
}

.article-meta-block span {
  padding: 6px 9px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--white);
  color: var(--green-dark);
  font-size: 12px;
  font-weight: 600;
}

.article-detail-cover {
  width: 100%;
  height: auto;
  display: block;
  border: 1px solid var(--ink);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  transform: rotate(1.5deg);
}

.article-detail-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: clamp(45px, 9vw, 130px);
  padding-top: 80px;
}

.article-richtext {
  max-width: 730px;
}

.article-richtext > p,
.article-richtext li,
.article-richtext td {
  color: var(--muted);
  font-size: 16px;
}

.article-richtext h2 {
  margin: 46px 0 17px;
  font-size: 30px;
}

.article-richtext ul {
  padding-left: 23px;
}

.article-richtext ol {
  padding-left: 23px;
}

.article-richtext li {
  margin-bottom: 10px;
}

.article-richtext a {
  color: var(--green-dark);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.checklist {
  display: grid;
  gap: 10px;
  padding-left: 0;
  list-style: none;
}

.checklist li {
  position: relative;
  padding-left: 28px;
}

.checklist li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--green-dark);
  font-weight: 700;
}

.source-link-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  padding-left: 0;
  list-style: none;
}

.source-link-list li {
  margin: 0;
}

.source-link-list a {
  display: block;
  padding: 13px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--white);
  text-decoration: none;
}

.answer-box {
  padding: 24px;
  border: 1px solid var(--ink);
  border-radius: var(--radius-md);
  background: var(--white);
  box-shadow: var(--shadow);
}

.answer-box h2 {
  margin-top: 0;
}

.answer-box p:last-child {
  margin-bottom: 0;
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--white);
}

.decision-table {
  width: 100%;
  min-width: 590px;
  border-collapse: collapse;
}

.decision-table th,
.decision-table td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.decision-table tr:last-child th,
.decision-table tr:last-child td {
  border-bottom: 0;
}

.decision-table thead th {
  color: var(--ink);
  font-size: 13px;
}

.decision-table tbody th {
  width: 26%;
  color: var(--ink);
  font-size: 15px;
}

.article-richtext details {
  border-top: 1px solid var(--line);
}

.article-richtext details:last-child {
  border-bottom: 1px solid var(--line);
}

.article-richtext summary {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding: 18px 0;
  cursor: pointer;
  font-weight: 600;
}

.article-richtext summary span {
  color: var(--green-dark);
  font-family: "Space Mono", monospace;
}

.article-richtext details p {
  margin: -2px 0 18px;
  color: var(--muted);
  font-size: 14px;
}

.article-aside {
  display: grid;
  align-content: start;
  gap: 16px;
}

.aside-card {
  padding: 23px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--white);
}

.aside-card h2 {
  margin-bottom: 16px;
  font-size: 23px;
}

.aside-card ul {
  display: grid;
  gap: 13px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.aside-card a {
  color: var(--green-dark);
  font-size: 13px;
}

.aside-card p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.aside-card a:hover {
  text-decoration: underline;
}

.aside-card > a {
  display: block;
  margin-top: 12px;
}

@keyframes float-in {
  from { opacity: 0; transform: translateY(17px) rotate(2.3deg); }
  to { opacity: 1; transform: translateY(0) rotate(2.3deg); }
}

@media (max-width: 820px) {
  .section-shell,
  .site-header { width: min(calc(100% - 32px), var(--max-width)); }
  .site-header { min-height: 75px; }
  .top-nav { display: none; }
  .hero {
    min-height: auto;
    grid-template-columns: 1fr;
    gap: 55px;
    padding-block: 55px 70px;
  }
  .hero-visual { min-height: 390px; }
  .visual-window { width: min(100%, 515px); }
  .download-strip { grid-template-columns: auto 1fr; }
  .strip-actions { grid-column: 1 / -1; justify-content: space-between; }
  .trust-section,
  .platform-section,
  .keyword-section,
  .blog-section { padding-top: 92px; }
  .trust-panel { grid-template-columns: 1fr; padding: 22px; }
  .platform-grid,
  .keyword-grid,
  .article-grid,
  .steps-grid { grid-template-columns: 1fr; gap: 13px; }
  .platform-card,
  .keyword-card { min-height: auto; }
  .platform-card h3,
  .keyword-card h3 { margin-top: 35px; }
  .article-detail { padding-top: 28px; }
  .article-detail-hero,
  .article-detail-grid { grid-template-columns: 1fr; }
  .article-detail-hero { gap: 45px; padding-bottom: 60px; }
  .article-detail-cover { max-width: 620px; }
  .article-detail-grid { padding-top: 60px; }
  .library-hero { grid-template-columns: 1fr; padding-block: 48px 60px; }
  .library-controls { grid-template-columns: 1fr 1fr; }
  .library-search { grid-column: 1 / -1; }
  .library-reset { width: 100%; }
  .published-grid,
  .topic-card-grid { grid-template-columns: repeat(2, 1fr); }
  .steps-section { padding-block: 95px 85px; }
  .step-card { min-height: auto; }
  .step-card-featured { transform: none; }
  .security-section { grid-template-columns: 1fr; gap: 55px; padding-block: 82px; }
  .faq-section { padding-block: 92px 80px; }
}

@media (max-width: 520px) {
  h1 { font-size: clamp(40px, 14vw, 62px); }
  .hero-description { font-size: 14px; }
  .heading-en { display: block; margin-top: 8px; font-size: .43em; }
  .summary-en { display: none; }
  .hero-actions { align-items: flex-start; flex-direction: column; }
  .visual-body { padding: 36px 30px; }
  .visual-title { font-size: 29px; }
  .visual-note { display: none; }
  .download-strip { padding: 21px; }
  .strip-copy h2 { font-size: 19px; }
  .strip-copy p { font-size: 12px; }
  .action-caption { display: none; }
  .strip-actions .button { width: 100%; }
  .library-stats { grid-template-columns: 1fr; }
  .library-stats div { min-height: 95px; }
  .library-controls { grid-template-columns: 1fr; }
  .library-search { grid-column: auto; }
  .published-grid,
  .topic-card-grid { grid-template-columns: 1fr; }
  .source-link-list { grid-template-columns: 1fr; }
  .final-cta { align-items: flex-start; flex-direction: column; }
  .final-cta .button { width: 100%; }
  .site-footer { align-items: flex-start; flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
}