/* roulang page: index */
:root {
    --bg: #0A0F0D;
    --panel: #101A16;
    --panel-2: #0C1310;
    --panel-soft: #0D1613;
    --line: rgba(214, 255, 207, 0.09);
    --text: #E9F0EA;
    --muted: #8B9B94;
    --accent: #D6FF47;
    --accent-ink: #0A0F0D;
    --dim-bg: rgba(214, 255, 71, 0.08);
  }

  * {
    box-sizing: border-box;
  }

  html {
    scroll-behavior: smooth;
    scroll-padding-top: 100px;
  }

  body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, sans-serif;
    font-size: 16px;
    line-height: 1.85;
    -webkit-font-smoothing: antialiased;
  }

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

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

  button {
    font: inherit;
    background: none;
    border: none;
    color: inherit;
    cursor: pointer;
  }

  input,
  textarea,
  select {
    font: inherit;
  }

  .container-page {
    width: 100%;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
    padding-left: 24px;
    padding-right: 24px;
  }

  .page-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    height: 72px;
    background: rgba(8, 16, 13, 0.92);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(214, 255, 71, 0.22);
  }

  .page-header .header-inner {
    height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
  }

  .brand-logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-weight: 900;
    font-size: 22px;
    letter-spacing: 0.02em;
    color: #fff;
    white-space: nowrap;
  }

  .brand-mark {
    position: relative;
    width: 34px;
    height: 34px;
    border-radius: 8px;
    background: var(--accent);
    color: var(--accent-ink);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 17px;
    font-weight: 900;
    box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.24);
  }

  .brand-mark i {
    font-size: 16px;
  }

  .brand-logo span:last-child {
    font-size: 21px;
  }

  .header-nav {
    display: flex;
    align-items: center;
    gap: 4px;
  }

  .nav-item {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 42px;
    padding: 0 15px;
    font-size: 14px;
    font-weight: 600;
    color: rgba(233, 240, 234, 0.82);
    border-radius: 5px;
    transition: color 0.2s ease, background 0.2s ease;
    white-space: nowrap;
  }

  .nav-item:hover {
    color: #fff;
    background: rgba(255, 255, 255, 0.04);
  }

  .nav-item.current {
    color: var(--accent);
  }

  .nav-item.current::after {
    content: "";
    position: absolute;
    left: 16px;
    right: 16px;
    bottom: -1px;
    height: 2px;
    background: var(--accent);
    border-radius: 2px;
    box-shadow: 0 0 12px rgba(214, 255, 71, 0.38);
  }

  .header-cta {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 38px;
    padding: 0 19px;
    background: var(--accent);
    color: var(--accent-ink);
    font-size: 14px;
    font-weight: 700;
    border-radius: 5px;
    transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
    white-space: nowrap;
  }

  .header-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(214, 255, 71, 0.22);
  }

  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    border-radius: 5px;
    font-weight: 700;
    transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease, border-color 0.2s ease, color 0.2s ease;
  }

  .btn-primary {
    background: var(--accent);
    color: var(--accent-ink);
  }

  .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(214, 255, 71, 0.2);
  }

  .btn-ghost {
    border: 1px solid rgba(233, 240, 234, 0.18);
    color: var(--text);
    background: rgba(255, 255, 255, 0.02);
  }

  .btn-ghost:hover {
    border-color: rgba(214, 255, 71, 0.45);
    color: var(--accent);
    transform: translateY(-2px);
  }

  .badge-lime {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    border-radius: 999px;
    padding: 5px 13px;
    background: var(--dim-bg);
    color: var(--accent);
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.04em;
  }

  .panel-box {
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 6px;
  }

  .section-block {
    padding-top: 84px;
    padding-bottom: 84px;
  }

  @media (min-width: 768px) {
    .section-block {
      padding-top: 112px;
      padding-bottom: 112px;
    }
  }

  @media (min-width: 1024px) {
    .section-block {
      padding-top: 132px;
      padding-bottom: 132px;
    }
  }

  .section-kicker {
    color: var(--accent);
    font-weight: 700;
    letter-spacing: 0.16em;
    font-size: 13px;
    text-transform: uppercase;
    display: flex;
    align-items: center;
    gap: 10px;
  }

  .section-kicker::before {
    content: "";
    display: block;
    width: 28px;
    height: 1px;
    background: var(--accent);
    opacity: 0.7;
  }

  .section-title {
    font-size: clamp(1.9rem, 3.2vw, 2.8rem);
    font-weight: 800;
    line-height: 1.24;
    color: #F5FAF6;
    margin: 0;
  }

  .text-muted {
    color: var(--muted);
  }

  .feature-idx {
    font-size: 13px;
    font-weight: 800;
    letter-spacing: 0.12em;
    color: var(--accent);
    line-height: 1;
  }

  .scene-row {
    display: grid;
    grid-template-columns: 1fr;
    border-bottom: 1px solid var(--line);
    padding: 0 0 28px;
    margin-bottom: 28px;
    gap: 24px;
  }

  @media (min-width: 768px) {
    .scene-row {
      grid-template-columns: 60px 1.3fr 0.7fr;
      align-items: center;
      padding: 8px 0 34px;
      margin-bottom: 38px;
      gap: 40px;
    }
  }

  .scene-media {
    position: relative;
    overflow: hidden;
    border-radius: 6px;
    border: 1px solid var(--line);
    background: #0d1411;
  }

  .scene-media img {
    width: 100%;
    height: 220px;
    object-fit: cover;
    transition: transform 0.5s ease;
  }

  .scene-row:hover .scene-media img {
    transform: scale(1.02);
  }

  .plan-card {
    position: relative;
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 6px;
    padding: 30px 24px;
    display: flex;
    flex-direction: column;
    height: 100%;
  }

  .plan-card.recommend {
    border-top: 2px solid var(--accent);
    background: var(--panel);
    box-shadow: 0 0 0 1px rgba(214, 255, 71, 0.08), 0 22px 50px rgba(0, 0, 0, 0.24);
  }

  .plan-badge {
    display: inline-flex;
    border-radius: 999px;
    background: var(--accent);
    color: var(--accent-ink);
    padding: 4px 12px;
    font-size: 12px;
    font-weight: 800;
    margin-bottom: 18px;
  }

  .faq-row {
    display: grid;
    grid-template-columns: 1fr;
    gap: 40px;
  }

  @media (min-width: 1024px) {
    .faq-row {
      grid-template-columns: 0.8fr 1.7fr;
      gap: 70px;
    }
  }

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

  .faq-item summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    list-style: none;
    cursor: pointer;
    padding: 20px 2px;
    font-size: 16px;
    font-weight: 600;
    color: #E1EBE4;
    transition: color 0.2s ease;
  }

  .faq-item summary::-webkit-details-marker {
    display: none;
  }

  .faq-item summary:hover {
    color: #fff;
  }

  .faq-arrow {
    position: relative;
    width: 22px;
    height: 22px;
    flex: 0 0 22px;
    border-radius: 6px;
    border: 1px solid rgba(214, 255, 71, 0.26);
    transition: all 0.2s ease;
    color: var(--accent);
  }

  .faq-arrow::before,
  .faq-arrow::after {
    content: "";
    position: absolute;
    left: 5px;
    top: 50%;
    width: 10px;
    height: 1px;
    background: currentColor;
  }

  .faq-arrow::after {
    transform: rotate(90deg);
    transition: transform 0.2s ease;
  }

  .faq-item[open] .faq-arrow::after {
    transform: rotate(0deg);
  }

  .faq-item[open] summary {
    color: #fff;
  }

  .faq-item .faq-body {
    color: var(--muted);
    font-size: 15px;
    line-height: 1.9;
    padding: 0 30px 28px 2px;
  }

  .footer-direction {
    background: #0C1310;
    border-top: 1px solid var(--line);
  }

  .footer-directory {
    background: #0C1310;
  }

  .footer-directory a,
  .footer-bottom a {
    color: var(--muted);
    transition: color 0.2s ease;
  }

  .footer-directory a:hover,
  .footer-bottom a:hover {
    color: var(--accent);
  }

  .news-card {
    position: relative;
    height: 100%;
    display: flex;
    flex-direction: column;
    background: #0C1411;
    border: 1px solid var(--line);
    border-radius: 6px;
    padding: 25px 25px 24px;
    transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
  }

  .news-card:hover {
    border-color: rgba(214, 255, 71, 0.42);
    box-shadow: 0 0 0 1px rgba(214, 255, 71, 0.12), 0 12px 34px rgba(0, 0, 0, 0.24);
    transform: translateY(-2px);
  }

  .stretched-link::after {
    content: "";
    position: absolute;
    inset: 0;
  }

  .link-arrow {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    color: var(--muted);
    font-size: 14px;
    font-weight: 600;
    transition: color 0.2s ease, gap 0.2s ease;
  }

  .link-arrow:hover {
    color: var(--accent);
    gap: 9px;
  }

  .m-menu {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    z-index: 99;
    background: #0A0F0D;
    padding-top: 96px;
    display: none;
    overflow-y: auto;
  }

  .m-menu.open {
    display: block;
  }

  .m-menu a {
    display: block;
    width: 100%;
    text-align: left;
    font-size: 20px;
    font-weight: 700;
    line-height: 54px;
    color: var(--text);
    padding: 0 24px;
    border-bottom: 1px solid rgba(233, 240, 234, 0.06);
  }

  .m-menu a.current {
    color: var(--accent);
    box-shadow: inset 3px 0 0 var(--accent);
  }

  .m-menu a:hover {
    background: rgba(214, 255, 71, 0.04);
  }

  .hero-title {
    font-size: clamp(2.45rem, 6vw, 4.4rem);
    font-weight: 800;
    line-height: 1.12;
    letter-spacing: -0.02em;
    color: #F5FAF6;
    margin: 0;
  }

  .hero-sub {
    font-size: clamp(1.05rem, 1.4vw, 1.15rem);
    color: #BCCBC3;
  }

  @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;
    }
  }

  .focus-visible\:ring-accent:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 3px;
  }

  .font-mono-num {
    font-variant-numeric: tabular-nums;
    letter-spacing: -0.01em;
  }

/* roulang page: article */
:root {
  --color-bg: #0A0F0D;
  --color-panel: #101A16;
  --color-panel-2: #0D1411;
  --color-panel-soft: #0C1411;
  --color-line: rgba(214, 255, 207, 0.09);
  --color-text: #E9F0EA;
  --color-muted: #8B9B94;
  --color-accent: #D6FF47;
  --color-accent-ink: #0A0F0D;
  --color-dim-bg: rgba(214, 255, 71, 0.08);
  --font-stack: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --radius: 6px;
  --radius-sm: 4px;
  --shadow-hover: 0 0 0 1px rgba(214,255,71,0.25), 0 12px 40px rgba(0,0,0,0.30);
  --scroll-pad: 100px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--scroll-pad);
  background: var(--color-bg);
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-stack);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

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

button,
input,
select,
textarea {
  font: inherit;
}

.container-page {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}

body::selection,
::selection {
  background: var(--color-accent);
  color: var(--color-accent-ink);
}

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: 2px;
}

a:focus-visible {
  outline-color: var(--color-accent);
}

/* ---------- 通用按钮 / 标签 / 徽章 ---------- */
.btn-lime {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--color-accent);
  color: var(--color-accent-ink);
  font-weight: 700;
  font-size: 15px;
  line-height: 1;
  height: 44px;
  padding: 0 22px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-accent);
  cursor: pointer;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}

.btn-lime i {
  font-size: 13px;
  transition: transform .2s ease;
}

.btn-lime:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 12px rgba(214, 255, 71, 0.3), 0 8px 30px rgba(0, 0, 0, 0.25);
}

.btn-lime:hover i {
  transform: translateX(3px);
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: transparent;
  color: var(--color-text);
  font-weight: 600;
  font-size: 14px;
  height: 42px;
  padding: 0 20px;
  border: 1px solid rgba(233, 240, 234, 0.22);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: border .2s ease, color .2s ease, transform .2s ease, box-shadow .2s ease;
}

.btn-ghost:hover {
  color: var(--color-accent);
  border-color: rgba(214, 255, 71, 0.55);
  transform: translateY(-2px);
  box-shadow: 0 0 12px rgba(214, 255, 71, 0.1);
}

.tag-lime {
  display: inline-flex;
  align-items: center;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--color-accent);
  background: rgba(214, 255, 71, 0.08);
  border: 1px solid rgba(214, 255, 71, 0.18);
  border-radius: 999px;
  padding: 6px 12px;
}

.tag-grey {
  display: inline-flex;
  align-items: center;
  font-size: 13px;
  font-weight: 500;
  color: var(--color-muted);
  border: 1px solid rgba(139, 155, 148, 0.25);
  background: rgba(255, 255, 255, 0.02);
  border-radius: 999px;
  padding: 4px 10px;
}

/* ---------- 顶部导航 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  height: 72px;
  background: rgba(8, 16, 13, 0.88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: inset 0 -1px 0 rgba(214, 255, 71, 0.22);
}

.header-flex {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: 72px;
}

.brand-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--color-text);
  transition: color .2s ease;
}

.brand-logo:hover {
  color: var(--color-accent);
}

.brand-mark {
  width: 31px;
  height: 31px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--color-panel);
  color: var(--color-accent);
  border: 1px solid rgba(214, 255, 71, 0.32);
  border-radius: 8px;
  font-size: 14px;
  box-shadow: 0 0 10px rgba(214, 255, 71, 0.08);
}

.header-nav {
  display: flex;
  align-items: center;
  margin-left: auto;
  gap: 34px;
}

.nav-item {
  position: relative;
  font-size: 14px;
  font-weight: 600;
  color: rgba(233, 240, 234, 0.78);
  padding: 8px 0;
  transition: color .18s ease;
  white-space: nowrap;
}

.nav-item:hover {
  color: var(--color-text);
}

.nav-item.current {
  color: var(--color-accent);
}

.nav-item.current::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -2px;
  height: 2px;
  background: var(--color-accent);
  box-shadow: 0 0 12px rgba(214, 255, 71, 0.4);
  border-radius: 2px;
}

.header-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 36px;
  padding: 0 18px;
  font-size: 14px;
  font-weight: 700;
  color: var(--color-accent-ink);
  background: var(--color-accent);
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-accent);
  white-space: nowrap;
  transition: transform .18s ease, box-shadow .18s ease;
}

.header-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 14px rgba(214, 255, 71, 0.35), 0 8px 22px rgba(0, 0, 0, 0.3);
}

.menu-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  background: transparent;
  border: 0;
  color: var(--color-text);
  font-size: 21px;
  cursor: pointer;
}

.mobile-panel {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  width: 100%;
  background: #08100D;
  border-top: 1px solid rgba(214, 255, 71, 0.16);
  border-bottom: 1px solid rgba(214, 255, 71, 0.18);
  padding: 14px 24px 24px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.45);
}

.mobile-panel nav {
  display: flex;
  flex-direction: column;
  align-items: stretch;
}

.mobile-panel .mobile-nav-link {
  display: flex;
  align-items: center;
  min-height: 50px;
  font-size: 20px;
  font-weight: 600;
  color: var(--color-text);
  border-bottom: 1px solid rgba(214, 255, 207, 0.06);
  transition: color .2s ease;
}

.mobile-panel .mobile-nav-link:hover {
  color: var(--color-accent);
}

.mobile-panel .mobile-nav-link.current {
  color: var(--color-accent);
  border-left: 3px solid var(--color-accent);
  padding-left: 14px;
  background: linear-gradient(90deg, rgba(214,255,71,0.10), transparent);
}

.mobile-panel .mobile-cta {
  display: flex;
  margin-top: 20px;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  background: var(--color-accent);
  color: var(--color-accent-ink);
  border-radius: var(--radius-sm);
  font-weight: 700;
}

body.menu-open {
  overflow: hidden;
}

body.menu-open .mobile-panel {
  display: block;
}

/* ---------- 面包屑 ---------- */
.crumb-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--color-muted);
  margin-bottom: 34px;
}

.crumb-nav a {
  color: var(--color-muted);
  transition: color .18s ease;
}

.crumb-nav a:hover {
  color: var(--color-accent);
}

.crumb-nav .crumb-arrow {
  color: rgba(139, 155, 148, 0.5);
  font-size: 11px;
}

.crumb-nav .crumb-current {
  color: rgba(233, 240, 234, 0.78);
  max-width: 420px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ---------- 文章头部 ---------- */
.article-top-section {
  padding: 64px 0 26px;
}

.article-masthead {
  max-width: 900px;
  margin: 0 auto;
}

.article-kicker {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 20px;
}

.article-pub-time {
  font-size: 13px;
  color: var(--color-muted);
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.article-pub-time i {
  color: var(--color-accent);
  font-size: 12px;
}

.article-masthead h1 {
  margin: 0;
  font-size: clamp(2rem, 4.4vw, 3.1rem);
  line-height: 1.2;
  letter-spacing: -0.02em;
  font-weight: 800;
  color: var(--color-text);
  max-width: 880px;
  overflow-wrap: break-word;
}

/* ---------- 正文阅读区 ---------- */
.article-reading-section {
  padding: 10px 0 42px;
}

.article-reader {
  max-width: 760px;
  margin: 0 auto;
}

.article-content {
  font-size: 16px;
  line-height: 1.9;
  color: var(--color-text);
  overflow-wrap: break-word;
}

.article-content > *:first-child {
  margin-top: 0;
}

.article-content p {
  margin: 1.6em 0;
  color: rgba(233, 240, 234, 0.9);
}

.article-content h2 {
  font-size: 26px;
  line-height: 1.35;
  font-weight: 800;
  color: var(--color-text);
  letter-spacing: -0.01em;
  margin: 2.2em 0 0.7em;
  padding-top: 8px;
}

.article-content h3 {
  font-size: 18px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--color-text);
  margin: 1.9em 0 0.5em;
}

.article-content a {
  color: var(--color-accent);
  border-bottom: 1px solid rgba(214, 255, 71, 0.35);
  transition: border-color .2s ease, background .2s ease;
}

.article-content a:hover {
  border-bottom-color: var(--color-accent);
}

.article-content ul,
.article-content ol {
  margin: 1.6em 0;
  padding-left: 1.3em;
  line-height: 1.9;
}

.article-content li {
  margin: 0.45em 0;
  color: rgba(233, 240, 234, 0.9);
}

.article-content li::marker {
  color: var(--color-accent);
}

.article-content blockquote {
  margin: 1.8em 0;
  padding: 16px 0 16px 22px;
  border-left: 3px solid var(--color-accent);
  background: rgba(214, 255, 71, 0.04);
  color: rgba(233, 240, 234, 0.88);
  font-size: 15px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.article-content blockquote p {
  margin: 0;
}

.article-content img {
  margin: 2.2em 0;
  border-radius: var(--radius);
  background: var(--color-panel);
  border: 1px solid var(--color-line);
  width: 100%;
  height: auto;
}

.article-content hr {
  margin: 2.4em 0;
  border: 0;
  height: 1px;
  background: var(--color-line);
}

.article-content strong {
  color: var(--color-text);
  font-weight: 700;
}

.article-content code {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.88em;
  background: rgba(214, 255, 71, 0.08);
  color: var(--color-accent);
  padding: 3px 6px;
  border-radius: 4px;
}

.article-content pre {
  background: var(--color-panel);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 20px;
  overflow-x: auto;
  margin: 2em 0;
}

/* ---------- 文章底部信息 ---------- */
.article-footer-block {
  border-top: 1px solid var(--color-line);
  margin-top: 42px;
  padding-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 14px;
}

.article-tag-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.article-footer-action {
  display: flex;
  align-items: center;
  gap: 14px;
}

.article-footer-action .text-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-muted);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: color .2s ease, transform .2s ease;
}

.article-footer-action .text-link:hover {
  color: var(--color-accent);
  transform: translateX(-3px);
}

.article-category-note {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  padding-top: 14px;
  font-size: 14px;
  color: var(--color-muted);
}

.article-category-note a {
  font-weight: 700;
  color: var(--color-accent);
}

.article-category-note a:hover {
  text-decoration: underline;
  text-underline-offset: 4px;
}

/* ---------- 相关推荐 ---------- */
.related-section {
  padding: 54px 0 66px;
  border-top: 1px solid var(--color-line);
  background: rgba(12, 20, 17, 0.42);
}

.section-heading-row {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 30px;
}

.section-label {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--color-accent);
  text-transform: uppercase;
}

.section-heading-row h2 {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.02em;
  margin: 6px 0 0;
  color: var(--color-text);
}

.section-heading-row .more-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-muted);
  border-bottom: 1px solid transparent;
  transition: color .18s ease, border-color .18s ease;
}

.section-heading-row .more-link:hover {
  color: var(--color-accent);
  border-color: rgba(214, 255, 71, 0.4);
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.related-card {
  background: var(--color-panel);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: border-color .22s ease, box-shadow .22s ease, transform .22s ease;
}

.related-card:hover {
  border-color: rgba(214, 255, 71, 0.45);
  box-shadow: 0 0 0 1px rgba(214,255,71,0.15), 0 14px 34px rgba(0,0,0,0.3);
  transform: translateY(-3px);
}

.related-thumb {
  aspect-ratio: 16 / 9;
  background: #0D1613;
  overflow: hidden;
}

.related-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .35s ease;
}

.related-card:hover .related-thumb img {
  transform: scale(1.03);
}

.related-card-body {
  padding: 18px 18px 16px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.related-title {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  font-size: 17px;
  line-height: 1.5;
  font-weight: 700;
  color: var(--color-text);
  margin: 10px 0 8px;
  transition: color .18s ease;
}

.related-card:hover .related-title {
  color: var(--color-accent);
}

.related-desc {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-muted);
}

.related-link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 13px;
  font-weight: 700;
  color: var(--color-accent);
  margin-top: auto;
  padding-top: 15px;
  transition: gap .2s ease;
}

.related-link:hover {
  gap: 11px;
}

/* ---------- 底部 CTA ---------- */
.cta-strip {
  background:
    linear-gradient(rgba(10, 15, 13, 0.72), rgba(10, 15, 13, 0.78)),
    url('/assets/images/backpic/back-2.png') center / cover no-repeat;
  border-top: 1px solid var(--color-line);
  padding: 58px 0;
}

.cta-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
}

.cta-inner h2 {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: -0.02em;
  margin: 8px 0 10px;
  color: var(--color-text);
}

.cta-lead {
  font-size: 14px;
  color: var(--color-muted);
  margin: 0;
}

.cta-link-meta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--color-accent);
}

/* ---------- 内容未找到 ---------- */
.notfound-block {
  padding: 110px 24px 130px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.notfound-code {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 58px;
  height: 58px;
  border: 1px solid rgba(214,255,71,0.3);
  background: rgba(214,255,71,0.06);
  color: var(--color-accent);
  font-size: 18px;
  font-weight: 800;
  border-radius: 10px;
  margin-bottom: 22px;
}

.notfound-block h1 {
  margin: 0 0 10px;
  font-size: 26px;
  font-weight: 800;
  color: var(--color-text);
}

.notfound-block p {
  color: var(--color-muted);
  margin: 0 0 24px;
}

/* ---------- 页脚 ---------- */
.site-footer {
  background: #0C1310;
  border-top: 1px solid rgba(214, 255, 71, 0.12);
  padding-top: 58px;
  padding-bottom: 28px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2.1fr 1fr 1fr 1.2fr;
  gap: 44px;
  padding-bottom: 38px;
  border-bottom: 1px solid rgba(214, 255, 207, 0.06);
}

.footer-brand .brand-logo {
  font-size: 20px;
  margin-bottom: 14px;
}

.footer-description {
  font-size: 14px;
  line-height: 1.75;
  color: var(--color-muted);
  max-width: 320px;
  margin: 0;
}

.footer-title {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: rgba(233, 240, 234, 0.5);
  margin: 18px 0 16px;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 11px;
}

.footer-links a {
  font-size: 14px;
  color: var(--color-muted);
  transition: color .18s ease, padding-left .18s ease;
}

.footer-links a:hover {
  color: var(--color-accent);
  padding-left: 4px;
}

.footer-contact {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.8;
}

.footer-contact a {
  color: var(--color-muted);
  border-bottom: 1px solid rgba(139,155,148,0.25);
  transition: color .18s ease, border-color .18s ease;
}

.footer-contact a:hover {
  color: var(--color-accent);
  border-color: rgba(214,255,71,0.4);
}

.footer-bottom {
  padding-top: 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
}

.footer-copyright {
  font-size: 13px;
  color: rgba(139, 155, 148, 0.8);
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .related-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .related-card:last-child {
    grid-column: span 1;
  }
}

@media (max-width: 860px) {
  .header-nav,
  .header-cta {
    display: none;
  }

  .menu-toggle {
    display: inline-flex;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 30px;
  }
}

@media (max-width: 600px) {
  .container-page {
    padding-left: 18px;
    padding-right: 18px;
  }

  .article-masthead h1 {
    font-size: 25px;
    line-height: 1.3;
  }

  .article-content {
    font-size: 16px;
  }

  .article-content h2 {
    font-size: 22px;
  }

  .article-content blockquote {
    padding: 12px 0 12px 16px;
  }

  .related-grid {
    grid-template-columns: 1fr;
    gap: 18px;
  }

  .cta-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
    padding-bottom: 26px;
  }

  .footer-brand .brand-logo {
    font-size: 18px;
  }

  .mobile-panel {
    padding-left: 18px;
    padding-right: 18px;
  }
}

/* ---------- 动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

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

/* roulang page: category1 */
:root {
      --color-bg: #0A0F0D;
      --color-panel: #101A16;
      --color-panel-2: #0D1411;
      --color-line: rgba(214, 255, 207, 0.09);
      --color-text: #E9F0EA;
      --color-muted: #8B9B94;
      --color-accent: #D6FF47;
      --color-accent-ink: #0A0F0D;
      --color-dim: rgba(214, 255, 71, 0.08);
      --radius: 6px;
      --radius-sm: 4px;
      --container: 1200px;
      --glow: 0 0 0 1px rgba(214, 255, 71, 0.25), 0 12px 40px rgba(0, 0, 0, 0.35);
    }

    *,
    *::before,
    *::after { box-sizing: border-box; }

    html {
      scroll-behavior: smooth;
      scroll-padding-top: 100px;
    }

    body {
      margin: 0;
      background: var(--color-bg);
      color: var(--color-text);
      font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
      font-size: 16px;
      line-height: 1.8;
      -webkit-font-smoothing: antialiased;
    }

    img { display: block; max-width: 100%; }
    a { color: inherit; text-decoration: none; }
    ul, ol { margin: 0; padding: 0; list-style: none; }
    p { margin: 0; }
    h1, h2, h3, h4 {
      margin: 0;
      color: #F3F8F4;
      font-weight: 800;
      line-height: 1.3;
    }
    button { font-family: inherit; }
    strong { color: #F4FFF6; }
    ::selection { background: var(--color-accent); color: var(--color-accent-ink); }
    :focus-visible {
      outline: 2px solid var(--color-accent);
      outline-offset: 3px;
    }

    .container-page {
      width: 100%;
      max-width: var(--container);
      margin-inline: auto;
      padding-inline: clamp(20px, 4vw, 40px);
    }

    .section-block {
      padding: clamp(60px, 8vw, 96px) 0;
      position: relative;
    }

    .section-h2 {
      font-size: clamp(1.8rem, 3vw, 2.65rem);
      line-height: 1.2;
      letter-spacing: -0.5px;
    }

    .eyebrow-label {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      color: var(--color-accent);
      font-size: 13px;
      font-weight: 700;
      letter-spacing: 0.12em;
      text-transform: uppercase;
      background: var(--color-dim);
      border: 1px solid rgba(214, 255, 71, 0.14);
      padding: 6px 12px;
      border-radius: var(--radius-sm);
      margin-bottom: 18px;
    }

    .eyebrow-label i { font-size: 12px; }

    .text-muted { color: var(--color-muted); }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 10px;
      padding: 13px 24px;
      border-radius: var(--radius-sm);
      font-weight: 700;
      font-size: 15px;
      line-height: 1;
      border: 1px solid transparent;
      cursor: pointer;
      transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease, border-color 0.2s ease;
    }

    .btn-primary {
      background: var(--color-accent);
      color: var(--color-accent-ink);
    }

    .btn-primary i {
      transition: transform 0.2s ease;
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 28px rgba(214, 255, 71, 0.2);
    }

    .btn-primary:hover i {
      transform: translateX(3px);
    }

    .btn-outline {
      background: transparent;
      border-color: rgba(233, 240, 234, 0.22);
      color: #E8F0EA;
    }

    .btn-outline:hover {
      border-color: var(--color-accent);
      color: var(--color-accent);
      transform: translateY(-2px);
      box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
    }

    .header-cta,
    .btn-header {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: var(--color-accent);
      color: var(--color-accent-ink);
      font-size: 14px;
      font-weight: 700;
      height: 36px;
      padding: 0 18px;
      border-radius: var(--radius-sm);
      transition: transform 0.18s ease, box-shadow 0.18s ease;
    }

    .header-cta:hover {
      transform: translateY(-1px);
      box-shadow: 0 0 0 1px rgba(214, 255, 71, 0.6), 0 10px 22px rgba(214, 255, 71, 0.16);
    }

    .page-header {
      position: sticky;
      top: 0;
      z-index: 70;
      background: rgba(6, 12, 10, 0.92);
      border-bottom: 1px solid rgba(214, 255, 71, 0.18);
      backdrop-filter: blur(18px);
      -webkit-backdrop-filter: blur(18px);
    }

    .header-inner {
      display: flex;
      align-items: center;
      gap: 24px;
      height: 72px;
    }

    .brand-logo {
      flex: 0 0 auto;
      display: inline-flex;
      align-items: center;
      gap: 10px;
      color: #fff;
      font-weight: 800;
      font-size: 21px;
      white-space: nowrap;
    }

    .brand-mark {
      width: 34px;
      height: 34px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: var(--color-accent);
      color: var(--color-accent-ink);
      border-radius: 8px;
      font-size: 14px;
    }

    .nav-desktop {
      display: flex;
      align-items: center;
      justify-content: center;
      flex: 1;
      gap: clamp(18px, 2.4vw, 30px);
    }

    .nav-item {
      position: relative;
      font-size: 14px;
      font-weight: 600;
      color: #DCE7DE;
      padding: 8px 2px;
      opacity: 0.72;
      white-space: nowrap;
      transition: opacity 0.2s ease, color 0.2s ease;
    }

    .nav-item:hover {
      opacity: 1;
      color: #fff;
    }

    .nav-item::after {
      content: "";
      position: absolute;
      left: 50%;
      bottom: 0;
      width: 0;
      height: 2px;
      background: var(--color-accent);
      transform: translateX(-50%);
      box-shadow: 0 0 12px rgba(214, 255, 71, 0.5);
      transition: width 0.2s ease;
    }

    .nav-item:hover::after {
      width: 100%;
    }

    .nav-item.current {
      color: var(--color-accent);
      opacity: 1;
    }

    .nav-item.current::after {
      width: 100%;
      left: 0;
      transform: none;
    }

    .header-actions {
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .menu-btn {
      display: none;
      align-items: center;
      justify-content: center;
      width: 44px;
      height: 44px;
      margin-left: auto;
      border: none;
      background: transparent;
      color: #fff;
      font-size: 22px;
      border-radius: 8px;
      cursor: pointer;
      z-index: 90;
    }

    .mobile-nav {
      position: fixed;
      inset: 0;
      z-index: 80;
      background: #08100D;
      padding-top: 92px;
      opacity: 0;
      visibility: hidden;
      transform: translateY(-18px);
      transition: opacity 0.22s ease, transform 0.22s ease, visibility 0.22s ease;
    }

    .mobile-nav.open {
      opacity: 1;
      visibility: visible;
      transform: translateY(0);
    }

    .mobile-nav-inner {
      display: flex;
      flex-direction: column;
      gap: 4px;
      padding-inline: 28px;
    }

    .mobile-nav-inner a {
      font-size: 20px;
      font-weight: 700;
      color: #E9F0EA;
      padding: 13px 4px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.06);
      display: flex;
      align-items: center;
      gap: 10px;
      transition: color 0.2s ease, padding 0.2s ease;
    }

    .mobile-nav-inner a.current {
      color: var(--color-accent);
      padding-left: 16px;
      border-left: 3px solid var(--color-accent);
    }

    .mobile-nav-inner a i {
      width: 22px;
      color: var(--color-accent);
      font-size: 16px;
    }

    .mb-cta {
      margin-top: 24px;
      background: var(--color-accent) !important;
      color: var(--color-accent-ink) !important;
      border-radius: var(--radius-sm) !important;
      border: none !important;
    }

    .hero-direct {
      position: relative;
      background-image: linear-gradient(80deg, rgba(7, 12, 10, 0.93) 8%, rgba(7, 12, 10, 0.78) 48%, rgba(7, 12, 10, 0.6)), url('/assets/images/backpic/back-2.png');
      background-position: center;
      background-size: cover;
      border-bottom: 1px solid rgba(214, 255, 71, 0.12);
      overflow: hidden;
    }

    .hero-direct::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      border: 1px solid rgba(214, 255, 71, 0.1);
      pointer-events: none;
    }

    .breadcrumb-nav {
      display: flex;
      align-items: center;
      gap: 8px;
      color: var(--color-muted);
      font-size: 13px;
      margin-bottom: 20px;
    }

    .breadcrumb-nav a:hover {
      color: var(--color-accent);
    }

    .breadcrumb-nav span {
      color: var(--color-accent);
    }

    .hero-title {
      font-size: clamp(2.45rem, 5.4vw, 4.2rem);
      font-weight: 800;
      line-height: 1.1;
      max-width: 850px;
      letter-spacing: -1px;
      color: #F4FFF6;
    }

    .hero-title-accent {
      color: var(--color-accent);
    }

    .hero-lead {
      max-width: 650px;
      font-size: 16px;
      line-height: 1.85;
      color: #B4C6BB;
      margin: 26px 0 36px;
    }

    .hero-features {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 12px;
      margin-top: 48px;
      max-width: 800px;
    }

    .hero-feature {
      background: rgba(16, 26, 22, 0.6);
      border: 1px solid rgba(214, 255, 207, 0.08);
      border-radius: var(--radius-sm);
      padding: 12px 14px;
      font-size: 13px;
      color: #D5E3D8;
      display: flex;
      align-items: flex-start;
      gap: 9px;
      backdrop-filter: blur(8px);
      transition: border-color 0.2s ease;
    }

    .hero-feature i {
      color: var(--color-accent);
      margin-top: 4px;
      font-size: 12px;
    }

    .img-frame {
      border-radius: 8px;
      overflow: hidden;
      position: relative;
      border: 1px solid rgba(233, 240, 234, 0.1);
      box-shadow: 0 24px 70px rgba(0, 0, 0, 0.35);
    }

    .img-frame img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.55s ease;
    }

    .img-frame:hover img {
      transform: scale(1.025);
    }

    .intro-card {
      background: var(--color-panel);
      border: 1px solid var(--color-line);
      border-radius: var(--radius);
      padding: clamp(24px, 3vw, 36px);
    }

    .intro-tag-list {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 22px;
    }

    .mini-tag {
      background: var(--color-dim);
      color: var(--color-accent);
      border: 1px solid rgba(214, 255, 71, 0.1);
      font-size: 13px;
      padding: 6px 12px;
      border-radius: var(--radius-sm);
      display: inline-flex;
      align-items: center;
      gap: 7px;
    }

    .catalog-section {
      background: var(--color-panel-2);
      border-top: 1px solid rgba(214, 255, 71, 0.07);
      border-bottom: 1px solid rgba(214, 255, 71, 0.07);
    }

    .catalog-layout {
      display: grid;
      grid-template-columns: minmax(190px, 280px) 1fr;
      gap: clamp(28px, 5vw, 72px);
    }

    .catalog-nav {
      position: sticky;
      top: 110px;
      align-self: flex-start;
      border: 1px solid var(--color-line);
      background: var(--color-panel);
      border-radius: var(--radius);
      padding: 24px 16px;
    }

    .catalog-nav-title {
      font-size: 14px;
      font-weight: 800;
      color: #DFEADF;
      padding-inline: 10px;
      margin-bottom: 12px;
    }

    .catalog-jump {
      display: flex;
      gap: 10px;
      align-items: flex-start;
      padding: 12px 10px;
      color: #AFC2B6;
      border-left: 2px solid transparent;
      transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
      font-size: 14px;
      font-weight: 600;
      border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    }

    .catalog-jump i {
      color: var(--color-muted);
      margin-top: 4px;
      font-size: 11px;
      transition: color 0.2s ease, transform 0.2s ease;
    }

    .catalog-jump:hover {
      background: var(--color-dim);
      color: var(--color-accent);
      border-color: var(--color-accent);
    }

    .catalog-jump:hover i {
      color: var(--color-accent);
      transform: translateX(3px);
    }

    .dir-group {
      scroll-margin-top: 100px;
      margin-bottom: clamp(28px, 4vw, 44px);
    }

    .dir-group-title {
      font-size: clamp(1.4rem, 2.5vw, 2.1rem);
      font-weight: 800;
      display: flex;
      align-items: center;
      gap: 14px;
    }

    .dir-group-num {
      font-size: 13px;
      color: var(--color-accent);
      border: 1px solid rgba(214, 255, 71, 0.2);
      background: var(--color-dim);
      padding: 4px 10px;
      border-radius: 999px;
    }

    .dir-group-desc {
      color: var(--color-muted);
      font-size: 14px;
      max-width: 560px;
      margin-top: 12px;
    }

    .dir-items {
      margin-top: 20px;
      border-top: 1px solid var(--color-line);
    }

    .dir-item {
      display: grid;
      grid-template-columns: 52px 1fr auto;
      gap: 16px;
      align-items: start;
      padding: 20px 6px;
      border-bottom: 1px solid var(--color-line);
      transition: background 0.2s ease, padding-left 0.2s ease;
    }

    .dir-item:hover {
      background: rgba(214, 255, 71, 0.03);
      padding-left: 12px;
    }

    .dir-idx {
      color: var(--color-accent);
      font-weight: 800;
      font-size: 17px;
      background: var(--color-dim);
      width: 42px;
      height: 42px;
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .dir-item h4 {
      font-size: 17px;
      font-weight: 800;
    }

    .dir-item p {
      color: var(--color-muted);
      font-size: 14px;
      line-height: 1.8;
      margin-top: 6px;
      max-width: 640px;
    }

    .dir-state {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      font-size: 12px;
      color: var(--color-accent);
      background: var(--color-dim);
      border-radius: 999px;
      padding: 4px 12px;
      white-space: nowrap;
    }

    .dir-state i {
      font-size: 8px;
    }

    .cap-table {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 1px;
      background: var(--color-line);
      border: 1px solid var(--color-line);
      border-radius: 8px;
      overflow: hidden;
    }

    .cap-cell {
      background: var(--color-panel);
      padding: clamp(22px, 3vw, 34px);
    }

    .cap-cell-number {
      color: var(--color-accent);
      font-size: 14px;
      font-weight: 800;
      letter-spacing: 0.2em;
    }

    .cap-cell h3 {
      font-size: 18px;
      font-weight: 800;
      margin: 12px 0 8px;
    }

    .cap-cell p {
      color: var(--color-muted);
      font-size: 14px;
      line-height: 1.8;
    }

    .scenario-row {
      display: grid;
      grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
      gap: clamp(24px, 4vw, 80px);
      align-items: center;
      padding: clamp(10px, 4vw, 45px) 0;
      border-bottom: 1px solid var(--color-line);
    }

    .scenario-row:first-child {
      border-top: 1px solid var(--color-line);
    }

    .scenario-step {
      font-size: 14px;
      font-weight: 800;
      color: var(--color-accent);
      letter-spacing: 0.12em;
    }

    .quote-card {
      background: var(--color-panel);
      border: 1px solid var(--color-line);
      border-radius: var(--radius);
      padding: clamp(28px, 4vw, 44px);
      position: relative;
      box-shadow: 0 20px 60px rgba(0, 0, 0, 0.25);
    }

    .quote-mark {
      width: 44px;
      height: 44px;
      background: var(--color-accent);
      color: var(--color-accent-ink);
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      margin-bottom: 18px;
    }

    .process-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 1px;
      background: var(--color-line);
      border: 1px solid var(--color-line);
      border-radius: 8px;
      overflow: hidden;
    }

    .process-item {
      background: var(--color-panel);
      padding: 26px 22px;
      min-height: 220px;
      display: flex;
      flex-direction: column;
      transition: background 0.2s ease, box-shadow 0.2s ease;
    }

    .process-item:hover {
      background: #151F1A;
      box-shadow: inset 0 0 0 1px rgba(214, 255, 71, 0.14);
    }

    .process-no {
      font-size: 32px;
      color: var(--color-accent);
      font-weight: 800;
      line-height: 1;
      opacity: 0.9;
      margin-bottom: auto;
    }

    .process-item h3 {
      font-size: 18px;
      font-weight: 800;
      margin: 36px 0 8px;
    }

    .process-item p {
      color: var(--color-muted);
      font-size: 14px;
      line-height: 1.7;
    }

    .feedback-footer {
      margin-top: 32px;
      border-top: 1px solid var(--color-line);
      padding-top: 24px;
    }

    .feedback-avatar {
      width: 44px;
      height: 44px;
      border-radius: 999px;
      background: var(--color-accent);
      color: var(--color-accent-ink);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 14px;
      flex: 0 0 auto;
    }

    .faq-wrap {
      max-width: 860px;
      margin: 0 auto;
    }

    .faq-item {
      border-bottom: 1px solid var(--color-line);
      background: transparent;
      transition: background 0.2s ease;
    }

    .faq-item summary {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 20px;
      list-style: none;
      cursor: pointer;
      padding: 22px 6px;
      font-size: 16px;
      font-weight: 700;
      color: #EAF2EC;
      border-radius: var(--radius-sm);
    }

    .faq-item summary::-webkit-details-marker {
      display: none;
    }

    .faq-item summary::after {
      content: "\f067";
      font-family: "Font Awesome 6 Free";
      font-weight: 900;
      font-size: 13px;
      color: var(--color-accent);
      width: 28px;
      height: 28px;
      display: flex;
      align-items: center;
      justify-content: center;
      background: var(--color-dim);
      border-radius: 999px;
      flex: 0 0 auto;
      transition: transform 0.2s ease, background 0.2s ease;
    }

    .faq-item[open] summary::after {
      content: "\f00d";
      background: var(--color-accent);
      color: var(--color-accent-ink);
    }

    .faq-item .answer {
      padding: 0 28px 20px 6px;
      color: var(--color-muted);
      font-size: 15px;
      max-width: 720px;
      animation: fadeInUp 0.3s ease;
    }

    .cta-strip {
      position: relative;
      background-image: linear-gradient(85deg, rgba(10, 15, 13, 0.95), rgba(16, 26, 22, 0.85)), url('/assets/images/backpic/back-3.webp');
      background-size: cover;
      background-position: center;
      border-top: 1px solid rgba(214, 255, 71, 0.14);
      border-bottom: 1px solid rgba(0, 0, 0, 0.3);
    }

    .cta-line {
      width: 64px;
      height: 2px;
      background: var(--color-accent);
      box-shadow: 0 0 16px rgba(214, 255, 71, 0.5);
      margin-bottom: 20px;
    }

    .site-footer {
      background: #0B1611;
      border-top: 1px solid var(--color-line);
      padding-top: clamp(46px, 6vw, 70px);
    }

    .footer-grid {
      display: grid;
      grid-template-columns: minmax(220px, 1.4fr) 0.9fr 0.9fr 1fr;
      gap: 30px;
    }

    .footer-brand p {
      max-width: 260px;
      font-size: 14px;
      color: var(--color-muted);
      margin-top: 16px;
    }

    .footer-heading {
      font-size: 12px;
      letter-spacing: 0.2em;
      text-transform: uppercase;
      color: #CDE3D4;
      font-weight: 800;
      margin-bottom: 16px;
    }

    .footer-links li + li {
      margin-top: 10px;
    }

    .footer-links a,
    .footer-links span {
      color: var(--color-muted);
      font-size: 14px;
      transition: color 0.2s ease, padding-left 0.2s ease;
    }

    .footer-links a:hover {
      color: var(--color-accent);
      padding-left: 4px;
    }

    .footer-bottom {
      margin-top: 60px;
      padding: 20px 0 28px;
      border-top: 1px solid rgba(214, 255, 207, 0.07);
      display: flex;
      align-items: center;
      flex-wrap: wrap;
      justify-content: space-between;
      gap: 12px;
      color: #7A8D83;
      font-size: 13px;
    }

    .dir-link {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      font-size: 14px;
      font-weight: 700;
      color: var(--color-accent);
      margin-top: 18px;
      transition: gap 0.2s ease;
    }

    .dir-link i {
      font-size: 12px;
    }

    .dir-link:hover {
      gap: 10px;
    }

    @keyframes fadeInUp {
      from {
        opacity: 0;
        transform: translateY(10px);
      }
      to {
        opacity: 1;
        transform: none;
      }
    }

    @media (max-width: 1023px) {
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }

      .process-grid {
        grid-template-columns: 1fr;
      }

      .process-item {
        min-height: 0;
      }

      .catalog-layout {
        grid-template-columns: 1fr;
      }

      .catalog-nav {
        position: static;
        display: flex;
        gap: 10px;
        padding: 14px;
        overflow-x: auto;
      }

      .catalog-nav-title {
        display: none;
      }

      .catalog-jump {
        white-space: nowrap;
        border-left: none;
        border-radius: var(--radius-sm);
        background: rgba(214, 255, 71, 0.04);
      }
    }

    @media (max-width: 767px) {
      .nav-desktop,
      .header-actions {
        display: none !important;
      }

      .menu-btn {
        display: inline-flex;
      }

      .hero-features {
        grid-template-columns: 1fr 1fr;
      }

      .hero-title {
        font-size: clamp(2rem, 9.5vw, 3.2rem);
      }

      .scenario-row {
        grid-template-columns: 1fr;
        padding: 32px 0;
      }

      .cap-table {
        grid-template-columns: 1fr;
      }

      .footer-grid {
        grid-template-columns: 1fr;
      }

      .hero-feature {
        padding: 10px 12px;
      }

      .dir-item {
        grid-template-columns: 1fr;
        padding: 18px 0;
        gap: 10px;
      }

      .dir-state {
        width: max-content;
      }
    }

    @media (max-width: 520px) {
      .hero-features {
        grid-template-columns: 1fr;
      }

      .btn {
        width: 100%;
      }

      .hero-btn-row {
        display: grid;
        gap: 12px;
      }

      .faq-item summary {
        font-size: 15px;
        padding: 18px 0;
      }

      .faq-item .answer {
        padding: 0 12px 18px 0;
      }
    }

    @media (prefers-reduced-motion: reduce) {
      *,
      *::before,
      *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
      }
    }

/* roulang page: category2 */
:root {
      --color-bg: #0A0F0D;
      --color-panel: #101A16;
      --color-panel-2: #0D1411;
      --color-line: rgba(214, 255, 207, 0.09);
      --color-text: #E9F0EA;
      --color-muted: #8B9B94;
      --color-accent: #D6FF47;
      --color-accent-ink: #0A0F0D;
      --color-dim-bg: rgba(214, 255, 71, 0.08);
    }

    * , *::before, *::after { box-sizing: border-box; }

    html {
      scroll-behavior: smooth;
      scroll-padding-top: 100px;
    }

    body {
      margin: 0;
      background-color: var(--color-bg);
      color: var(--color-text);
      font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
      font-size: 16px;
      line-height: 1.85;
      -webkit-font-smoothing: antialiased;
      text-rendering: optimizeLegibility;
    }

    a { color: inherit; text-decoration: none; }
    img { max-width: 100%; display: block; }
    button { font-family: inherit; cursor: pointer; }
    ul, ol { list-style: none; margin: 0; padding: 0; }
    h1, h2, h3, p { margin-top: 0; }

    :focus-visible {
      outline: 2px solid var(--color-accent);
      outline-offset: 3px;
      border-radius: 4px;
    }

    ::selection { background: var(--color-accent); color: var(--color-accent-ink); }

    .container-page {
      max-width: 1200px;
      margin: 0 auto;
      padding-left: 24px;
      padding-right: 24px;
    }

    .text-muted { color: var(--color-muted); }
    .text-accent { color: var(--color-accent); }
    .material { color: var(--color-text); font-weight: 600; line-height: 1.5; }

    /* header */
    .page-header {
      position: fixed;
      inset: 0 0 auto 0;
      z-index: 60;
      background: rgba(8, 16, 13, 0.96);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(214, 255, 71, 0.22);
      box-shadow: 0 1px 0 rgba(214, 255, 71, 0.04);
    }

    .header-inner {
      height: 72px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 24px;
    }

    .brand-logo {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      font-size: 22px;
      font-weight: 800;
      letter-spacing: 0.02em;
      color: #fff;
      white-space: nowrap;
    }

    .brand-mark {
      width: 34px;
      height: 34px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: var(--color-accent);
      color: var(--color-accent-ink);
      border-radius: 4px;
      font-size: 15px;
      box-shadow: 0 0 0 1px rgba(214, 255, 71, 0.2), 0 0 18px rgba(214, 255, 71, 0.10);
    }

    .nav-item {
      position: relative;
      display: inline-flex;
      align-items: center;
      height: 72px;
      padding: 0 4px;
      margin: 0 18px;
      font-size: 14px;
      font-weight: 600;
      color: #C8D2CC;
      letter-spacing: 0.01em;
      transition: color 0.2s ease;
    }

    .nav-item:hover {
      color: #fff;
    }

    .nav-item.current {
      color: var(--color-accent);
    }

    .nav-item.current::after {
      content: "";
      position: absolute;
      left: 0;
      right: 0;
      bottom: 0;
      height: 2px;
      background: var(--color-accent);
      box-shadow: 0 0 12px rgba(214, 255, 71, 0.45);
      border-radius: 2px 2px 0 0;
    }

    .header-cta {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      height: 36px;
      padding: 0 20px;
      font-size: 14px;
      font-weight: 700;
      color: var(--color-accent-ink);
      background: var(--color-accent);
      border-radius: 4px;
      white-space: nowrap;
      transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
    }

    .header-cta:hover {
      background: #E4FF70;
      transform: translateY(-2px);
      box-shadow: 0 8px 28px rgba(214, 255, 71, 0.18);
    }

    /* mobile drawer */
    .mobile-toggle {
      border: 0;
      background: transparent;
      color: #fff;
      font-size: 22px;
      line-height: 1;
      width: 40px;
      height: 40px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
    }

    .mobile-drawer {
      position: fixed;
      z-index: 70;
      inset: 0;
      background: #08100D;
      padding: 96px 28px 40px;
      transform: translateX(100%);
      visibility: hidden;
      transition: transform 0.26s ease, visibility 0.26s ease;
    }

    .mobile-drawer.open {
      transform: translateX(0);
      visibility: visible;
    }

    .mobile-drawer-close {
      position: absolute;
      top: 16px;
      right: 20px;
      width: 44px;
      height: 44px;
      color: #fff;
      font-size: 20px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: transparent;
      border: 0;
    }

    .mobile-drawer-nav {
      display: flex;
      flex-direction: column;
    }

    .mobile-drawer-nav a {
      display: flex;
      align-items: center;
      min-height: 56px;
      font-size: 20px;
      font-weight: 700;
      color: #DDE7E0;
      border-bottom: 1px solid rgba(214, 255, 207, 0.08);
    }

    .mobile-drawer-nav a.current {
      color: var(--color-accent);
      padding-left: 14px;
      box-shadow: inset 3px 0 0 var(--color-accent);
    }

    .mobile-drawer-nav a:hover { color: #fff; }

    .mobile-drawer-cta {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      height: 46px;
      background: var(--color-accent);
      color: var(--color-accent-ink);
      font-weight: 700;
      font-size: 16px;
      margin-top: 24px;
      border-radius: 4px;
    }

    /* hero */
    .cat-hero {
      position: relative;
      overflow: hidden;
      background-color: var(--color-bg);
      padding-top: 152px;
      padding-bottom: 78px;
      border-bottom: 1px solid var(--color-line);
    }

    .cat-hero-bg {
      position: absolute;
      inset: 0;
      background-position: center 30%;
      background-size: cover;
      opacity: 0.5;
    }

    .cat-hero-overlay {
      position: absolute;
      inset: 0;
      background: linear-gradient(90deg, rgba(10, 15, 13, 0.92) 0%, rgba(10, 15, 13, 0.76) 48%, rgba(10, 15, 13, 0.5) 100%);
    }

    .cat-hero-inner {
      position: relative;
      z-index: 2;
      max-width: 960px;
    }

    .breadcrumb {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 10px;
      font-size: 13px;
      color: var(--color-muted);
      margin-bottom: 24px;
    }

    .breadcrumb a { transition: color 0.2s ease; }
    .breadcrumb a:hover { color: var(--color-accent); }
    .breadcrumb .crumb-arrow { opacity: 0.5; }

    .hero-chip-row {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 12px;
      margin-bottom: 18px;
    }

    .hero-chip {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 12px;
      font-size: 13px;
      font-weight: 600;
      border-radius: 999px;
      background: var(--color-dim-bg);
      color: var(--color-accent);
      border: 1px solid rgba(214, 255, 71, 0.18);
    }

    .pulse-dot {
      width: 7px;
      height: 7px;
      border-radius: 999px;
      background: var(--color-accent);
      box-shadow: 0 0 0 4px rgba(214, 255, 71, 0.15);
    }

    .cat-hero h1 {
      margin: 16px 0 20px;
      font-size: clamp(2.2rem, 5.2vw, 3.7rem);
      font-weight: 800;
      line-height: 1.12;
      letter-spacing: 0.01em;
      color: #F2F7F3;
    }

    .cat-hero h1 em {
      font-style: normal;
      color: var(--color-accent);
    }

    .cat-hero-lead {
      max-width: 720px;
      font-size: 17px;
      line-height: 1.9;
      color: #B9C8BF;
    }

    .hero-action-group {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
      margin-top: 36px;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 10px;
      min-height: 46px;
      padding: 0 26px;
      font-size: 15px;
      font-weight: 700;
      border-radius: 4px;
      border: 1px solid transparent;
      transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease, color 0.2s ease;
    }

    .btn-primary {
      background: var(--color-accent);
      color: var(--color-accent-ink);
    }
    .btn-primary:hover {
      background: #E7FF78;
      transform: translateY(-2px);
      box-shadow: 0 12px 30px rgba(214, 255, 71, 0.14);
    }

    .btn-ghost {
      background: transparent;
      color: #E3EAE4;
      border-color: rgba(214, 255, 207, 0.18);
    }
    .btn-ghost:hover {
      border-color: rgba(214, 255, 71, 0.55);
      color: #fff;
      transform: translateY(-2px);
    }

    /* section bases */
    .section-page {
      padding: 96px 0 104px;
    }

    .section-page + .section-page,
    .section-page + .section-drect {
      border-top: 1px solid var(--color-line);
    }

    .section-drect {
      background: #0C1411;
      padding: 88px 0 96px;
      border-top: 1px solid var(--color-line);
      border-bottom: 1px solid var(--color-line);
    }

    .section-page:has(+ .section-page) {
      border-top: 0;
    }

    .section-head {
      display: flex;
      align-items: flex-start;
      justify-content: space-between;
      gap: 32px;
      margin-bottom: 56px;
    }

    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      color: var(--color-accent);
      font-size: 13px;
      font-weight: 700;
      letter-spacing: 0.14em;
      margin-bottom: 12px;
    }

    .eyebrow::before {
      content: "";
      width: 24px;
      height: 1px;
      background: var(--color-accent);
      opacity: 0.7;
    }

    .section-title {
      font-size: clamp(1.9rem, 3.4vw, 2.9rem);
      font-weight: 800;
      line-height: 1.2;
      letter-spacing: 0.01em;
      margin-bottom: 16px;
    }

    .section-desc {
      font-size: 15px;
      color: var(--color-muted);
      max-width: 680px;
      line-height: 1.9;
    }

    .mid-rule {
      width: 54px;
      height: 2px;
      background: var(--color-accent);
      margin: 22px 0 30px;
      box-shadow: 0 0 12px rgba(214, 255, 71, 0.4);
    }

    /* stats metrics */
    .cat-metrics {
      background: var(--color-panel);
      border-top: 1px solid var(--color-line);
      border-bottom: 1px solid var(--color-line);
    }

    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 0;
    }

    .metric-cell {
      padding: 34px 28px;
      border-right: 1px solid var(--color-line);
      display: flex;
      flex-direction: column;
      gap: 6px;
    }
    .metric-cell:last-child { border-right: 0; }

    .metric-num {
      font-size: 34px;
      font-weight: 800;
      color: var(--color-accent);
      line-height: 1.1;
      letter-spacing: 0.02em;
    }
    .metric-label {
      color: var(--color-muted);
      font-size: 13px;
    }

    /* reading order */
    .read-flow {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      border: 1px solid var(--color-line);
      border-radius: 6px;
      background: var(--color-panel);
    }

    .read-step {
      min-height: 210px;
      padding: 34px 36px;
      border-right: 1px solid var(--color-line);
      display: flex;
      flex-direction: column;
      align-items: flex-start;
    }
    .read-step:last-child { border-right: 0; }

    .step-num {
      font-family: "SFMono-Regular", Consolas, monospace;
      color: var(--color-accent);
      font-size: 13px;
      letter-spacing: 0.16em;
      margin-bottom: 18px;
    }

    .step-name {
      color: #F0F5F1;
      font-size: 19px;
      font-weight: 700;
      line-height: 1.5;
    }

    .step-info {
      margin-top: 10px;
      color: var(--color-muted);
      font-size: 14px;
      line-height: 1.8;
    }

    /* alternating chapters */
    .chapter-item {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 72px;
      align-items: center;
      padding: 88px 0;
      border-bottom: 1px solid var(--color-line);
    }
    .chapter-item:last-of-type { border-bottom: 0; }

    .chapter-item.flip .chapter-visual { order: 2; }
    .chapter-item.flip .chapter-content { order: 1; }

    .chapter-kicker {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      font-size: 13px;
      font-weight: 700;
      letter-spacing: 0.08em;
      color: var(--color-accent);
      margin-bottom: 16px;
    }

    .chapter-kicker span {
      opacity: 0.6;
    }

    .chapter-item h3 {
      font-size: clamp(1.5rem, 2.4vw, 2.1rem);
      line-height: 1.3;
      margin-bottom: 26px;
      color: #F1F6F2;
    }

    .chapter-item p {
      color: var(--color-muted);
      line-height: 1.95;
      margin-bottom: 26px;
    }

    .feature-list {
      display: grid;
      gap: 14px;
    }

    .feature-list li {
      display: flex;
      gap: 12px;
      align-items: flex-start;
      color: #C6D2CA;
      font-size: 14px;
      line-height: 1.8;
      border-bottom: 1px dashed rgba(214, 255, 207, 0.09);
      padding-bottom: 12px;
    }
    .feature-list li:last-child { border-bottom: 0; }

    .feature-list li i {
      margin-top: 4px;
      color: var(--color-accent);
      width: 16px;
      text-align: center;
      font-size: 13px;
    }

    .chapter-visual {
      position: relative;
    }

    .visual-frame {
      position: relative;
      background: var(--color-panel);
      border: 1px solid var(--color-line);
      border-radius: 6px;
      overflow: hidden;
      transition: box-shadow 0.25s ease, border-color 0.25s ease;
    }

    .visual-frame:hover {
      border-color: rgba(214, 255, 71, 0.35);
      box-shadow: 0 0 0 1px rgba(214, 255, 71, 0.15), 0 16px 46px rgba(0, 0, 0, 0.32);
    }

    .visual-frame img {
      width: 100%;
      height: 360px;
      object-fit: cover;
    }

    .visual-cap {
      position: absolute;
      left: 14px;
      bottom: 14px;
      padding: 7px 12px;
      font-size: 12px;
      color: #D9E3DC;
      background: rgba(8, 13, 10, 0.8);
      border-radius: 4px;
      border: 1px solid rgba(214, 255, 207, 0.1);
      backdrop-filter: blur(6px);
    }

    .status-pill-group {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 8px;
    }

    .status-pill {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 6px 12px;
      border-radius: 4px;
      font-size: 13px;
      font-weight: 600;
      background: var(--color-dim-bg);
      color: #DCE8DE;
      border: 1px solid rgba(214, 255, 71, 0.14);
    }

    .status-pill i { color: var(--color-accent); }

    .chapter-link {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      margin-top: 8px;
      color: #D9E6DC;
      font-weight: 600;
      font-size: 14px;
    }

    .chapter-link i {
      transition: transform 0.2s ease;
      color: var(--color-accent);
    }
    .chapter-link:hover i { transform: translateX(4px); }

    /* checklist rect panel */
    .rect-panel {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 20px;
    }

    .rect-card {
      display: flex;
      flex-direction: column;
      gap: 18px;
      background: var(--color-panel);
      border: 1px solid var(--color-line);
      border-radius: 6px;
      padding: 32px 34px;
      position: relative;
      transition: border-color 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease;
    }

    .rect-card:hover {
      border-color: rgba(214, 255, 71, 0.4);
      box-shadow: 0 0 0 1px rgba(214, 255, 71, 0.12), 0 18px 40px rgba(0, 0, 0, 0.3);
      transform: translateY(-3px);
    }

    .rect-icon {
      width: 46px;
      height: 46px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: var(--color-dim-bg);
      color: var(--color-accent);
      border: 1px solid rgba(214, 255, 71, 0.18);
      border-radius: 4px;
      font-size: 17px;
    }

    .rect-card h4 {
      margin: 0;
      font-size: 18px;
      font-weight: 700;
      color: #EFF5F0;
      line-height: 1.5;
    }

    .rect-card p {
      margin: 0;
      color: var(--color-muted);
      font-size: 14px;
      line-height: 1.85;
    }

    .simple-checklist {
      border: 1px solid var(--color-line);
      border-radius: 6px;
      background: var(--color-panel);
      padding: 20px 24px 8px;
    }

    .simple-checklist li {
      display: flex;
      align-items: flex-start;
      gap: 12px;
      padding: 8px 0;
      color: #C2CFC7;
      font-size: 14px;
      border-bottom: 1px dashed rgba(214, 255, 207, 0.08);
    }
    .simple-checklist li:last-child { border-bottom: 0; }
    .simple-checklist i { color: var(--color-accent); margin-top: 4px; font-size: 13px; }

    /* code panel */
    .code-panel {
      background: #09100D;
      border: 1px solid rgba(214, 255, 71, 0.2);
      border-radius: 6px;
      box-shadow: 0 16px 44px rgba(0, 0, 0, 0.2);
      overflow: hidden;
    }

    .code-panel-top {
      display: flex;
      align-items: center;
      gap: 8px;
      padding: 14px 18px;
      border-bottom: 1px solid rgba(214, 255, 71, 0.16);
      background: #0D1613;
    }

    .code-dot {
      width: 9px;
      height: 9px;
      border-radius: 99px;
      background: #606B66;
    }
    .code-dot:first-child { background: var(--color-accent); }

    .code-panel-body {
      padding: 28px 30px;
    }

    .code-panel-body h3 {
      color: #F4F8F5;
      font-size: 19px;
      font-weight: 700;
    }

    .check-steps {
      margin-top: 18px;
      display: grid;
      gap: 14px;
    }

    .check-steps li {
      display: flex;
      gap: 16px;
      align-items: flex-start;
      color: #C4D1C9;
      line-height: 1.8;
      font-size: 15px;
    }

    .check-index {
      min-width: 28px;
      height: 28px;
      border-radius: 4px;
      background: rgba(214, 255, 71, 0.1);
      color: var(--color-accent);
      font-size: 13px;
      font-weight: 700;
      display: inline-flex;
      align-items: center;
      justify-content: center;
    }

    /* faq */
    .faq-wrap {
      display: grid;
      grid-template-columns: 320px 1fr;
      gap: 56px;
      align-items: start;
    }

    .faq-left .section-title { font-size: clamp(1.7rem, 2.5vw, 2.2rem); }

    .faq-contact {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      color: #D0DDD4;
      font-weight: 600;
      margin-top: 20px;
      font-size: 15px;
    }

    .faq-contact i {
      color: var(--color-accent);
      transition: transform 0.2s ease;
    }
    .faq-contact:hover i { transform: translateX(4px); }

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

    .faq-item {
      border-bottom: 1px solid var(--color-line);
      background: transparent;
      transition: background 0.2s ease;
    }

    .faq-item summary {
      list-style: none;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 24px;
      padding: 22px 4px 22px 0;
      cursor: pointer;
      font-size: 15px;
      font-weight: 600;
      color: #DEE9E1;
      user-select: none;
    }

    .faq-item summary::-webkit-details-marker { display: none; }
    .faq-item summary:hover { color: #fff; }

    .faq-ico {
      flex: 0 0 auto;
      width: 28px;
      height: 28px;
      border: 1px solid rgba(214, 255, 71, 0.25);
      border-radius: 4px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      color: var(--color-accent);
      font-size: 13px;
      background: transparent;
      transition: border-color 0.2s ease, background 0.2s ease;
    }

    .faq-item[open] summary .faq-ico {
      background: var(--color-accent);
      color: var(--color-accent-ink);
      border-color: var(--color-accent);
    }
    .faq-item[open] summary .faq-ico i { display: none; }
    .faq-item[open] summary .faq-ico::before {
      content: "\f00d";
      font-family: "Font Awesome 6 Free";
      font-weight: 900;
      font-size: 13px;
    }

    .faq-answer {
      overflow: hidden;
      animation: faqFade 0.24s ease both;
    }

    @keyframes faqFade {
      from { opacity: 0; transform: translateY(-6px); }
      to { opacity: 1; transform: translateY(0); }
    }

    .faq-answer p {
      margin: 0;
      padding: 0 34px 24px 0;
      color: var(--color-muted);
      font-size: 14px;
      line-height: 1.9;
    }

    /* final cta */
    .cta-final {
      border-top: 1px solid var(--color-line);
      background:
        linear-gradient(90deg, rgba(10,15,13,0.9), rgba(16,26,22,0.85)),
        url('/assets/images/backpic/back-1.webp') center / cover no-repeat;
      padding: 92px 0 104px;
    }

    .cta-final .container-page {
      display: flex;
      flex-direction: column;
      align-items: center;
      text-align: center;
    }

    .cta-final h2 {
      font-size: clamp(1.8rem, 3.4vw, 2.8rem);
      color: #F1F6F2;
      margin-bottom: 18px;
      max-width: 860px;
    }

    .cta-final p {
      color: var(--color-muted);
      max-width: 660px;
      margin-bottom: 36px;
    }

    .cta-final .hero-action-group { justify-content: center; }

    /* footer */
    .page-footer {
      background: #0C1310;
      border-top: 1px solid rgba(214, 255, 71, 0.14);
      color: #9AACA2;
    }

    .footer-main {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.4fr;
      gap: 44px;
      padding: 64px 0 42px;
    }

    .footer-brand .brand-logo { color: #F2F6F3; margin-bottom: 16px; }
    .footer-brand .footer-summary {
      color: #7D8F84;
      font-size: 14px;
      line-height: 1.9;
      max-width: 320px;
      margin: 12px 0 20px;
    }

    .footer-domain {
      font-size: 12px;
      color: #62716A;
      font-style: normal;
      letter-spacing: 0.02em;
    }

    .footer-col h4 {
      color: #D5E0D8;
      font-size: 13px;
      font-weight: 700;
      letter-spacing: 0.08em;
      margin: 0 0 18px;
      padding-bottom: 10px;
      border-bottom: 1px solid rgba(214, 255, 71, 0.12);
    }

    .footer-col a,
    .footer-col p {
      display: block;
      font-size: 14px;
      color: #8EA199;
      margin-bottom: 10px;
      line-height: 1.9;
    }

    .footer-col a:hover { color: var(--color-accent); }
    .footer-col .contact-icon { width: 16px; color: var(--color-accent); margin-right: 4px; text-align: center; }

    .footer-bottom {
      border-top: 1px solid rgba(214, 255, 207, 0.08);
      padding: 22px 0 28px;
    }

    .footer-bottom-inner {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      justify-content: space-between;
      gap: 10px;
      font-size: 13px;
      color: #687A72;
    }

    @media (max-width: 1024px) {
      .section-page { padding: 76px 0 80px; }
      .section-drect { padding: 72px 0 76px; }
      .chapter-item { gap: 40px; padding: 66px 0; }
      .visual-frame img { height: 330px; }
      .footer-main { grid-template-columns: 1fr 1fr 1fr; }
    }

    @media (max-width: 768px) {
      .container-page { padding-left: 20px; padding-right: 20px; }
      .metrics-grid { grid-template-columns: repeat(2, 1fr); }
      .metric-cell { border-bottom: 1px solid var(--color-line); }
      .metric-cell:nth-child(3) { border-bottom: 0; }
      .metric-cell:nth-child(4) { border-bottom: 0; }
      .read-flow { grid-template-columns: 1fr; }
      .read-step { border-right: 0; border-bottom: 1px solid var(--color-line); }
      .read-step:last-child { border-bottom: 0; }
      .chapter-item { grid-template-columns: 1fr; gap: 30px; }
      .chapter-item.flip .chapter-visual { order: 0; }
      .chapter-item.flip .chapter-content { order: 0; }
      .chapter-item .chapter-content { grid-row: 2; }
      .chapter-item.flip .chapter-content { grid-row: 2; }
      .visual-frame img { height: 260px; }
      .rect-panel { grid-template-columns: 1fr; gap: 16px; }
      .rect-card { padding: 26px; }
      .faq-wrap { grid-template-columns: 1fr; gap: 28px; }
      .footer-main { grid-template-columns: 1fr 1fr; gap: 32px; }
      .cat-hero { padding-top: 128px; padding-bottom: 60px; }
    }

    @media (max-width: 520px) {
      .container-page { padding-left: 16px; padding-right: 16px; }
      .cat-hero h1 { font-size: 2.05rem; }
      .brand-logo { font-size: 18px; }
      .brand-mark { width: 30px; height: 30px; }
      .section-title { font-size: 1.6rem; }
      .metrics-grid { grid-template-columns: 1fr 1fr; }
      .metric-cell { padding: 24px 18px; }
      .metric-num { font-size: 27px; }
      .read-step { padding: 28px 24px; }
      .chapter-item h3 { font-size: 1.4rem; }
      .code-panel-body { padding: 20px; }
      .section-head { flex-direction: column; }
      .footer-main { grid-template-columns: 1fr; gap: 28px; padding: 46px 0 34px; }
    }

    @media (prefers-reduced-motion: reduce) {
      * , *::before, *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
      }
    }