/* ==========================================================================
   热门黑料 · 全站样式
   分组：base / layout / components / pages / responsive
   ========================================================================== */

/* --------------------------------------------------------------------------
   base
   -------------------------------------------------------------------------- */

:root {
  --paper: #f7f6f3;
  --paper-deep: #eeebe5;
  --ink: #22262b;
  --ink-soft: #626870;
  --ink-faint: #8a8f96;
  --line: #d9d8d2;
  --line-soft: #e6e4de;
  --blue: #6c8496;
  --sage: #7d8f7b;
  --clay: #a18472;
  --mauve: #837d93;
  --notice: #eef0ec;
  --white: #ffffff;
  --radius: 6px;
  --radius-sm: 4px;
  --shell: 1120px;
  --shell-narrow: 820px;
  --gap: 32px;
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC",
    sans-serif;
  --font-mono: "SFMono-Regular", "SF Mono", Consolas, "Liberation Mono", Menlo,
    monospace;
}

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

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

.site-body {
  margin: 0;
  background-color: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

h1,
h2,
h3,
h4,
p,
ul,
ol,
dl,
dd,
figure,
blockquote {
  margin: 0;
}

ul,
ol {
  padding: 0;
  list-style: none;
}

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

a {
  color: var(--ink);
  text-decoration: none;
  transition: color 0.18s ease;
}

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

a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 3px;
}

strong {
  font-weight: 600;
}

table {
  border-collapse: collapse;
  width: 100%;
}

button {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}

.skip-link {
  position: absolute;
  left: 16px;
  top: -60px;
  z-index: 60;
  padding: 10px 18px;
  background-color: var(--ink);
  color: var(--white);
  border-radius: var(--radius-sm);
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 12px;
  color: var(--white);
}

/* --------------------------------------------------------------------------
   layout · 全站骨架
   -------------------------------------------------------------------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background-color: rgba(247, 246, 243, 0.96);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(6px);
}

.header-inner {
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 24px;
  min-height: 66px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--ink);
  white-space: nowrap;
  padding: 6px 0;
}

.brand::after {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  margin-left: 8px;
  vertical-align: 2px;
  border-radius: 50%;
  background-color: var(--clay);
}

.site-nav {
  display: flex;
  align-items: center;
}

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

.nav-list li {
  display: block;
}

.nav-list a {
  display: inline-block;
  padding: 8px 12px;
  font-size: 0.9375rem;
  color: var(--ink-soft);
  border-radius: var(--radius-sm);
  line-height: 1.4;
}

.nav-list a:hover {
  color: var(--ink);
  background-color: var(--paper-deep);
}

.nav-list a.is-current {
  color: var(--ink);
  font-weight: 600;
  box-shadow: inset 0 -2px 0 var(--blue);
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background-color: var(--white);
  cursor: pointer;
  position: relative;
}

.nav-toggle-bar {
  display: block;
  width: 18px;
  height: 2px;
  margin: 3px auto;
  background-color: var(--ink);
  border-radius: 1px;
}

.site-main {
  display: block;
}

.inner-main {
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 24px 72px;
}

.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  padding: 20px 0 0;
  font-size: 0.8125rem;
  color: var(--ink-faint);
}

.breadcrumb a {
  color: var(--ink-soft);
}

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

.breadcrumb-sep {
  color: var(--line);
}

.breadcrumb-current {
  color: var(--ink);
}

.page-header {
  padding: 22px 0 18px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 32px;
}

.page-title {
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  font-weight: 600;
  line-height: 1.25;
  color: var(--ink);
}

.site-footer {
  margin-top: 8px;
  background-color: var(--paper-deep);
  border-top: 1px solid var(--line);
}

.footer-inner {
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 48px 24px 32px;
  display: grid;
  grid-template-columns: minmax(220px, 1.4fr) repeat(3, minmax(140px, 1fr));
  gap: 32px 28px;
}

.footer-brand-name {
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 10px;
}

.footer-brand-desc {
  font-size: 0.875rem;
  color: var(--ink-soft);
  line-height: 1.75;
  max-width: 320px;
}

.footer-title {
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--ink-faint);
  margin-bottom: 12px;
}

.footer-col ul {
  display: grid;
  gap: 8px;
}

.footer-col a {
  font-size: 0.875rem;
  color: var(--ink-soft);
  display: inline-block;
  padding: 2px 0;
}

.footer-col a:hover {
  color: var(--ink);
}

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

.footer-bottom p {
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 18px 24px 28px;
  font-size: 0.8125rem;
  color: var(--ink-faint);
  line-height: 1.7;
}

/* --------------------------------------------------------------------------
   components · 通用模块
   -------------------------------------------------------------------------- */

.section-title {
  font-size: 1.5rem;
  font-weight: 600;
  line-height: 1.35;
  color: var(--ink);
  margin-bottom: 10px;
}

.section-head {
  margin-bottom: 24px;
}

.section-lead {
  font-size: 0.9375rem;
  color: var(--ink-soft);
  max-width: 760px;
}

.section-intro {
  font-size: 0.9375rem;
  color: var(--ink-soft);
  max-width: 760px;
  margin-bottom: 22px;
}

.text-link {
  display: inline-block;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--blue);
  padding: 6px 0;
  border-bottom: 1px solid transparent;
}

.text-link::after {
  content: " →";
  font-size: 0.875rem;
}

.text-link:hover {
  border-bottom-color: var(--blue);
}

/* 色标与标签 */
.eyebrow,
.section-tag,
.page-hero-tag,
.cat-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  background-color: var(--notice);
  color: var(--ink-soft);
  margin-bottom: 14px;
}

.eyebrow-blue,
.tag-blue,
.tag-bluegray {
  background-color: #e7edf0;
  color: #4c6373;
}

.tag-sage {
  background-color: #e9ede7;
  color: #56654f;
}

.tag-clay,
.tag-terracotta {
  background-color: #f0e8e2;
  color: #7f6350;
}

.tag-version {
  background-color: #ebe9ef;
  color: #5f5a70;
}

.eyebrow-purple {
  background-color: #ebe9ef;
  color: #5f5a70;
}

/* 结论框 */
.conclusion-box,
.notice-box {
  background-color: var(--notice);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px 24px;
  margin-bottom: 36px;
}

.conclusion-box h2,
.notice-box h2,
.notice-title {
  font-size: 1.0625rem;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--ink);
}

.conclusion-box p,
.notice-box p {
  font-size: 0.9375rem;
  color: var(--ink-soft);
}

.conclusion-list {
  display: grid;
  gap: 8px;
  margin-top: 14px;
}

.conclusion-list li {
  font-size: 0.9375rem;
  color: var(--ink-soft);
  padding-left: 18px;
  position: relative;
}

.conclusion-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--blue);
}

.conclusion-list strong {
  color: var(--ink);
}

/* 图片容器 */
.hero-figure,
.method-figure,
.tree-figure,
.material-figure,
.content-figure,
.article-media,
.media-figure,
.aside-figure,
.review-figure {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background-color: var(--white);
}

.hero-figure img,
.method-figure img,
.tree-figure img,
.material-figure img,
.content-figure img,
.article-media img,
.media-figure img,
.aside-figure img,
.review-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-figure figcaption,
.method-figure figcaption,
.tree-figure figcaption,
.material-figure figcaption,
.content-figure figcaption,
.article-media figcaption,
.media-figure figcaption,
.aside-figure figcaption,
.review-figure figcaption {
  font-size: 0.8125rem;
  color: var(--ink-faint);
  padding: 10px 14px;
  border-top: 1px solid var(--line-soft);
  line-height: 1.6;
  background-color: var(--white);
}

/* 字段表 */
.field-table {
  font-size: 0.9375rem;
  margin-bottom: 28px;
  background-color: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.field-table caption {
  text-align: left;
  font-size: 0.8125rem;
  color: var(--ink-faint);
  padding: 12px 16px;
  border-bottom: 1px solid var(--line-soft);
  background-color: var(--paper-deep);
}

.field-table th,
.field-table td {
  text-align: left;
  padding: 12px 16px;
  border-bottom: 1px solid var(--line-soft);
  vertical-align: top;
  line-height: 1.65;
}

.field-table thead th {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--ink-soft);
  background-color: var(--paper-deep);
  white-space: nowrap;
}

.field-table tbody th {
  font-weight: 600;
  color: var(--ink);
  background-color: #fbfaf8;
}

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

.field-label {
  display: block;
  font-size: 0.8125rem;
  color: var(--ink-faint);
  margin-bottom: 4px;
}

/* 边界清单 */
.boundary-list {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

.boundary-list li {
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
  display: grid;
  gap: 4px;
}

.boundary-list strong {
  font-size: 0.9375rem;
  color: var(--ink);
}

.boundary-list span {
  font-size: 0.9375rem;
  color: var(--ink-soft);
}

.boundary-list h3 {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--ink);
}

.boundary-list p {
  font-size: 0.9375rem;
  color: var(--ink-soft);
}

/* 站内链接组 */
.inline-link-list,
.related-links,
.review-links,
.aside-link-list,
.terms-links,
.feedback-entry-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
}

.inline-link-list a,
.related-links a,
.review-links a,
.aside-link-list a,
.terms-links a,
.feedback-entry-list a {
  font-size: 0.9375rem;
  color: var(--blue);
  padding: 4px 0;
}

.inline-link-list a:hover,
.related-links a:hover,
.review-links a:hover,
.aside-link-list a:hover,
.terms-links a:hover,
.feedback-entry-list a:hover {
  color: var(--ink);
}

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

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

.faq-item summary {
  cursor: pointer;
  list-style: none;
  padding: 14px 30px 14px 0;
  position: relative;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--ink);
  line-height: 1.6;
}

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

.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 4px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.125rem;
  color: var(--ink-faint);
  line-height: 1;
}

.faq-item[open] summary::after {
  content: "–";
}

.faq-answer {
  padding: 0 0 16px;
  font-size: 0.9375rem;
  color: var(--ink-soft);
  line-height: 1.75;
}

.faq-link {
  margin-top: 8px;
}

.faq-link a {
  font-size: 0.875rem;
  color: var(--blue);
}

/* --------------------------------------------------------------------------
   pages · 首页
   -------------------------------------------------------------------------- */

.home-main {
  padding-bottom: 8px;
}

.hero {
  border-bottom: 1px solid var(--line);
  background-color: var(--paper);
}

.hero-inner {
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 44px 24px 36px;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: 44px;
  align-items: start;
}

.hero-copy {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.hero-eyebrow {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--clay);
  padding: 4px 10px;
  background-color: #f0e8e2;
  border-radius: var(--radius-sm);
  margin-bottom: 18px;
}

.hero h1 {
  font-size: clamp(1.75rem, 3.6vw, 2.6rem);
  font-weight: 600;
  line-height: 1.28;
  color: var(--ink);
  margin-bottom: 16px;
}

.hero-lead {
  font-size: 1rem;
  color: var(--ink-soft);
  line-height: 1.8;
  margin-bottom: 24px;
  max-width: 520px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 22px;
  font-size: 0.9375rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  line-height: 1.4;
}

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

.btn-primary:hover {
  background-color: #33393f;
  color: var(--white);
}

.btn-ghost {
  background-color: transparent;
  color: var(--ink);
  border-color: var(--line);
}

.btn-ghost:hover {
  border-color: var(--ink-soft);
  color: var(--ink);
  background-color: var(--white);
}

.hero-visual {
  display: grid;
  gap: 18px;
}

.hero-figure {
  margin: 0;
}

.hero-figure img {
  aspect-ratio: 16 / 10;
  width: 100%;
  height: auto;
}

.hero-capabilities {
  display: grid;
  gap: 10px;
  padding: 16px 18px;
  background-color: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.hero-capabilities li {
  font-size: 0.875rem;
  color: var(--ink-soft);
  padding-left: 16px;
  position: relative;
  line-height: 1.6;
}

.hero-capabilities li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--sage);
}

.hero-capabilities strong {
  color: var(--ink);
  display: block;
  font-size: 0.875rem;
}

.hero-flow {
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 24px 40px;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
}

.hero-flow li {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  background-color: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  color: var(--ink-soft);
  line-height: 1.5;
}

.flow-step {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--blue);
  background-color: #e7edf0;
  border-radius: 3px;
  padding: 1px 6px;
  flex: none;
}

/* 服务分类导航条 */
.category-bar {
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 44px 24px 0;
}

.category-track {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.category-item {
  display: grid;
  gap: 6px;
  padding: 16px 16px 18px;
  background-color: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  align-content: start;
}

.category-item:hover {
  border-color: var(--ink-faint);
}

.category-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: var(--ink-faint);
}

.category-name {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--ink);
}

.category-desc {
  font-size: 0.8125rem;
  color: var(--ink-soft);
  line-height: 1.6;
}

.tone-blue .category-dot {
  background-color: var(--blue);
}

.tone-sage .category-dot {
  background-color: var(--sage);
}

.tone-clay .category-dot {
  background-color: var(--clay);
}

.tone-mauve .category-dot {
  background-color: var(--mauve);
}

/* 服务条目总览 */
.service-overview {
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 48px 24px 0;
}

.service-rows {
  display: grid;
  gap: 12px;
}

.service-row {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr) minmax(0, 1fr) minmax(0, 0.7fr);
  gap: 20px;
  padding: 20px 22px;
  background-color: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  align-items: start;
}

.service-field {
  min-width: 0;
}

.field-main h3 {
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 6px;
  line-height: 1.45;
}

.field-main p {
  font-size: 0.875rem;
  color: var(--ink-soft);
  line-height: 1.7;
}

.service-field p {
  font-size: 0.875rem;
  color: var(--ink-soft);
  line-height: 1.7;
}

.field-link a {
  display: inline-block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--blue);
  padding: 4px 0;
}

.field-link a::after {
  content: " →";
}

.field-link a:hover {
  color: var(--ink);
}

/* 合作路径预览 */
.coop-preview {
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 48px 24px 0;
}

.coop-steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  counter-reset: coop;
}

.coop-step {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 18px 18px 20px;
  background-color: var(--white);
  border: 1px solid var(--line);
  border-top: 3px solid var(--clay);
  border-radius: var(--radius);
}

.coop-step .step-index {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--clay);
}

.coop-step h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--ink);
}

.coop-step p {
  font-size: 0.875rem;
  color: var(--ink-soft);
  line-height: 1.7;
}

.coop-step a {
  font-size: 0.8125rem;
  color: var(--blue);
  margin-top: auto;
  padding-top: 4px;
}

.coop-step a:hover {
  color: var(--ink);
}

/* 核验方法摘要 */
.method-summary {
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 48px 24px 0;
}

.method-inner {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 36px;
  align-items: start;
  padding: 28px;
  background-color: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.method-visual {
  min-width: 0;
}

.method-figure {
  margin: 0;
}

.method-figure img {
  aspect-ratio: 4 / 3;
  width: 100%;
  height: auto;
}

.method-copy {
  min-width: 0;
}

.method-points {
  display: grid;
  gap: 14px;
  margin: 18px 0 20px;
}

.method-points li {
  padding-left: 16px;
  border-left: 2px solid var(--sage);
}

.method-points h3 {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 4px;
}

.method-points p {
  font-size: 0.875rem;
  color: var(--ink-soft);
  line-height: 1.7;
}

/* 资料版本与帮助 */
.version-help {
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 48px 24px 64px;
}

.version-help > .section-title {
  margin-bottom: 22px;
}

.version-help-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 20px;
  align-items: start;
}

.version-col,
.help-col {
  padding: 22px 24px;
  background-color: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.col-title {
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 14px;
}

.version-list {
  display: grid;
  gap: 12px;
  margin-bottom: 16px;
}

.version-list li {
  display: grid;
  gap: 4px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line-soft);
}

.version-list li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.version-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--mauve);
  background-color: #ebe9ef;
  border-radius: 3px;
  padding: 1px 6px;
  justify-self: start;
}

.version-list p {
  font-size: 0.875rem;
  color: var(--ink-soft);
  line-height: 1.7;
}

.text-l {
  display: inline-block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--blue);
  padding: 4px 0;
}

.text-l::after {
  content: " →";
}

.text-l:hover {
  color: var(--ink);
}

/* --------------------------------------------------------------------------
   pages · 服务目录
   -------------------------------------------------------------------------- */

.page-heading {
  margin-bottom: 28px;
}

.page-heading .page-lead {
  font-size: 1rem;
  color: var(--ink-soft);
  line-height: 1.8;
  max-width: 800px;
}

.catalog-tree {
  margin-bottom: 44px;
}

.tree-figure {
  margin: 0 0 22px;
}

.tree-figure img {
  aspect-ratio: 21 / 9;
  width: 100%;
  height: auto;
}

.tree-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.tree-col {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 18px;
  background-color: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  border-top-width: 3px;
}

.tree-col .cat-tag {
  margin-bottom: 0;
  align-self: flex-start;
}

.tree-col h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--ink);
  line-height: 1.45;
}

.tree-col p {
  font-size: 0.875rem;
  color: var(--ink-soft);
  line-height: 1.7;
}

.tree-col a {
  margin-top: auto;
  font-size: 0.8125rem;
  color: var(--blue);
  padding-top: 4px;
}

.tree-col a:hover {
  color: var(--ink);
}

.tree-col-blue {
  border-top-color: var(--blue);
}

.tree-col-blue .cat-tag {
  background-color: #e7edf0;
  color: #4c6373;
}

.tree-col-sage {
  border-top-color: var(--sage);
}

.tree-col-sage .cat-tag {
  background-color: #e9ede7;
  color: #56654f;
}

.tree-col-clay {
  border-top-color: var(--clay);
}

.tree-col-clay .cat-tag {
  background-color: #f0e8e2;
  color: #7f6350;
}

.tree-col-violet {
  border-top-color: var(--mauve);
}

.tree-col-violet .cat-tag {
  background-color: #ebe9ef;
  color: #5f5a70;
}

.service-list {
  margin-bottom: 44px;
}

.service-list .service-row {
  grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr) minmax(0, 1fr) minmax(0, 0.85fr);
  margin-bottom: 12px;
}

.service-cell {
  min-width: 0;
}

.cell-label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--ink-faint);
  margin-bottom: 6px;
}

.service-cell h3 {
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 6px;
  line-height: 1.45;
}

.service-cell p {
  font-size: 0.875rem;
  color: var(--ink-soft);
  line-height: 1.7;
}

.cell-list {
  display: grid;
  gap: 5px;
}

.cell-list li {
  font-size: 0.875rem;
  color: var(--ink-soft);
  line-height: 1.65;
  padding-left: 14px;
  position: relative;
}

.cell-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background-color: var(--line);
}

.service-cell-side a {
  display: inline-block;
  margin-top: 8px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--blue);
  padding: 4px 0;
}

.service-cell-side a::after {
  content: " →";
}

.service-cell-side a:hover {
  color: var(--ink);
}

.catalog-summary {
  margin-bottom: 8px;
}

.summary-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.summary-block {
  padding: 18px 20px;
  background-color: var(--white);
  border: 1px solid var(--line);
  border-left-width: 3px;
  border-radius: var(--radius);
}

.summary-block h3 {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 8px;
}

.summary-block p {
  font-size: 0.875rem;
  color: var(--ink-soft);
  line-height: 1.7;
}

.summary-block a {
  display: inline-block;
  margin-top: 8px;
  font-size: 0.8125rem;
  color: var(--blue);
}

.summary-block-blue {
  border-left-color: var(--blue);
}

.summary-block-sage {
  border-left-color: var(--sage);
}

.summary-block-clay {
  border-left-color: var(--clay);
}

/* --------------------------------------------------------------------------
   pages · 合作路径
   -------------------------------------------------------------------------- */

.page-hero {
  margin-bottom: 32px;
}

.page-hero-lead,
.page-lede {
  font-size: 1rem;
  color: var(--ink-soft);
  line-height: 1.8;
  max-width: 800px;
}

.fit-check {
  margin-bottom: 44px;
}

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

.fit-col {
  padding: 20px 22px;
  background-color: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.fit-col h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line-soft);
}

.fit-col-yes h3 {
  color: #56654f;
}

.fit-col-no h3 {
  color: #7f6350;
}

.fit-list {
  display: grid;
  gap: 10px;
}

.fit-list li {
  display: grid;
  gap: 2px;
  padding-left: 16px;
  position: relative;
}

.fit-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
}

.fit-col-yes .fit-list li::before {
  background-color: var(--sage);
}

.fit-col-no .fit-list li::before {
  background-color: var(--clay);
}

.fit-list strong {
  font-size: 0.9375rem;
  color: var(--ink);
}

.fit-list span {
  font-size: 0.875rem;
  color: var(--ink-soft);
  line-height: 1.7;
}

.steps-block {
  margin-bottom: 44px;
}

.step-list {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

.step-item {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  gap: 20px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}

.step-index {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  color: var(--clay);
  line-height: 1.3;
  padding-top: 2px;
}

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

.step-name {
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 6px;
}

.step-action {
  font-size: 0.9375rem;
  color: var(--ink-soft);
  line-height: 1.75;
  margin-bottom: 8px;
}

.step-output {
  font-size: 0.9375rem;
  color: var(--ink-soft);
  line-height: 1.75;
  margin-bottom: 6px;
}

.step-next {
  font-size: 0.875rem;
}

.step-next a {
  color: var(--blue);
}

.step-next a:hover {
  color: var(--ink);
}

.material-block {
  margin-bottom: 44px;
}

.material-figure {
  margin: 0 0 22px;
}

.material-figure img {
  aspect-ratio: 21 / 9;
  width: 100%;
  height: auto;
}

.boundary-block {
  margin-bottom: 16px;
}

.boundary-block .boundary-list {
  margin-bottom: 28px;
}

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

.feedback-item {
  padding: 20px 22px;
  background-color: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.feedback-item h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 8px;
}

.feedback-item p {
  font-size: 0.875rem;
  color: var(--ink-soft);
  line-height: 1.7;
}

.feedback-link {
  margin-top: 10px;
}

.feedback-link a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--blue);
}

.feedback-link a:hover {
  color: var(--ink);
}

/* --------------------------------------------------------------------------
   pages · 核验方法
   -------------------------------------------------------------------------- */

.page-title-block {
  margin-bottom: 28px;
}

.method-phases {
  margin-bottom: 40px;
}

.phase-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.phase-item {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 18px;
  background-color: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  border-top: 3px solid var(--blue);
}

.phase-index {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--blue);
}

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

.phase-name {
  font-size: 1rem;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 6px;
  line-height: 1.45;
}

.phase-action {
  font-size: 0.875rem;
  color: var(--ink-soft);
  line-height: 1.7;
  margin-bottom: 8px;
}

.phase-check {
  font-size: 0.8125rem;
  color: var(--ink-faint);
  line-height: 1.65;
  padding-left: 12px;
  border-left: 2px solid var(--line);
  margin-bottom: 8px;
}

.phase-output {
  font-size: 0.8125rem;
  color: var(--ink-soft);
  line-height: 1.65;
}

.method-phases + .method-figure {
  margin: 0 0 40px;
}

.method-phases + .method-figure img {
  aspect-ratio: 21 / 9;
  width: 100%;
  height: auto;
}

.evidence-levels {
  margin-bottom: 40px;
}

.evidence-note {
  font-size: 0.8125rem;
  color: var(--ink-faint);
  line-height: 1.7;
  padding-left: 14px;
  border-left: 2px solid var(--line);
}

.response-structure {
  margin-bottom: 40px;
}

.structure-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.structure-item {
  padding: 18px;
  background-color: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.structure-item h3 {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 8px;
}

.structure-item p {
  font-size: 0.875rem;
  color: var(--ink-soft);
  line-height: 1.7;
}

.structure-field {
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px dashed var(--line);
  font-size: 0.8125rem;
  color: var(--ink-faint);
  line-height: 1.65;
}

.method-pitfalls {
  margin-bottom: 8px;
}

.pitfall-list {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
  margin-bottom: 24px;
}

.pitfall-item {
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.pitfall-item h3 {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 6px;
}

.pitfall-result {
  font-size: 0.875rem;
  color: var(--ink-soft);
  line-height: 1.7;
  margin-bottom: 4px;
}

.pitfall-fix {
  font-size: 0.875rem;
  color: #56654f;
  line-height: 1.7;
}

.next-step-links {
  padding: 18px 20px;
  background-color: var(--notice);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.next-step-links p {
  font-size: 0.875rem;
  color: var(--ink-soft);
  margin-bottom: 8px;
}

/* --------------------------------------------------------------------------
   pages · 资料版本
   -------------------------------------------------------------------------- */

.page-hero.tone-version {
  border-left: 3px solid var(--mauve);
  padding-left: 18px;
  margin-bottom: 32px;
}

.version-current {
  margin-bottom: 40px;
}

.version-card {
  background-color: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px 24px;
}

.version-card-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line-soft);
  margin-bottom: 16px;
}

.version-badge {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 600;
  color: #5f5a70;
  background-color: #ebe9ef;
  border-radius: var(--radius-sm);
  padding: 3px 10px;
}

.version-card-status {
  font-size: 0.875rem;
  color: var(--ink-soft);
}

.version-meta {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  margin-bottom: 16px;
}

.version-meta-item {
  min-width: 0;
}

.version-meta-item dt {
  font-size: 0.75rem;
  color: var(--ink-faint);
  margin-bottom: 4px;
}

.version-meta-item dd {
  font-size: 0.9375rem;
  color: var(--ink);
  line-height: 1.6;
}

.version-note {
  font-size: 0.875rem;
  color: var(--ink-soft);
  line-height: 1.75;
  padding-top: 14px;
  border-top: 1px solid var(--line-soft);
}

.version-rules {
  margin-bottom: 40px;
}

.rule-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.rule-card {
  padding: 18px 20px;
  background-color: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.rule-index {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--mauve);
  margin-bottom: 8px;
}

.rule-card h3 {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 6px;
}

.rule-card p {
  font-size: 0.875rem;
  color: var(--ink-soft);
  line-height: 1.7;
}

.version-log {
  margin-bottom: 40px;
}

.version-table {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background-color: var(--white);
}

.version-row {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 0.85fr) minmax(0, 2fr) minmax(0, 0.9fr);
  gap: 16px;
  padding: 14px 18px;
  border-bottom: 1px solid var(--line-soft);
  align-items: start;
}

.version-row:last-child {
  border-bottom: 0;
}

.version-row-head {
  background-color: var(--paper-deep);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--ink-soft);
}

.version-row span {
  font-size: 0.875rem;
  color: var(--ink-soft);
  line-height: 1.65;
  min-width: 0;
  word-break: break-word;
}

.version-row-head span {
  color: var(--ink-soft);
}

.version-cell-version {
  font-family: var(--font-mono);
  color: var(--ink) !important;
}

.status-pill {
  display: inline-block;
  font-size: 0.75rem;
  padding: 1px 8px;
  border-radius: 3px;
  line-height: 1.6;
}

.status-done {
  background-color: #e9ede7;
  color: #56654f;
}

.status-review {
  background-color: #ebe9ef;
  color: #5f5a70;
}

.version-review {
  margin-bottom: 8px;
}

.review-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.7fr) minmax(240px, 0.9fr);
  gap: 24px;
  align-items: start;
}

.review-main {
  min-width: 0;
}

.review-figure {
  margin: 0 0 22px;
}

.review-figure img {
  aspect-ratio: 16 / 9;
  width: 100%;
  height: auto;
}

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

.review-state {
  padding: 16px 18px;
  background-color: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.review-state h3 {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 6px;
}

.review-state p {
  font-size: 0.875rem;
  color: var(--ink-soft);
  line-height: 1.7;
}

.review-side {
  padding: 20px 22px;
  background-color: var(--notice);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.review-side h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 8px;
}

.review-side p {
  font-size: 0.875rem;
  color: var(--ink-soft);
  line-height: 1.7;
  margin-bottom: 12px;
}

.review-links {
  flex-direction: column;
  gap: 6px;
}

/* --------------------------------------------------------------------------
   pages · 帮助与边界
   -------------------------------------------------------------------------- */

.page-header-wrap {
  margin-bottom: 28px;
}

.content-shell {
  min-width: 0;
}

.help-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.75fr) minmax(240px, 0.85fr);
  gap: 28px;
  align-items: start;
  margin-bottom: 44px;
}

.faq-section {
  min-width: 0;
}

.help-aside {
  padding: 20px;
  background-color: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.aside-figure {
  margin: 0 0 16px;
}

.aside-figure img {
  aspect-ratio: 4 / 3;
  width: 100%;
  height: auto;
}

.help-aside h2 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 12px;
}

.aside-link-list {
  flex-direction: column;
  gap: 6px;
}

.boundary-section {
  margin-bottom: 44px;
}

.feedback-section {
  margin-bottom: 8px;
}

.feedback-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-bottom: 20px;
}

.feedback-card {
  padding: 20px 22px;
  background-color: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.feedback-card h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 8px;
}

.feedback-card p {
  font-size: 0.875rem;
  color: var(--ink-soft);
  line-height: 1.7;
}

/* --------------------------------------------------------------------------
   pages · 隐私说明
   -------------------------------------------------------------------------- */

.container {
  width: 100%;
}

.narrow-container {
  max-width: var(--shell-narrow);
}

.narrow-container .page-heading {
  margin-bottom: 22px;
}

.content-figure {
  margin: 0 0 32px;
}

.content-figure img {
  aspect-ratio: 16 / 9;
  width: 100%;
  height: auto;
}

.content-section {
  margin-bottom: 36px;
}

.content-section h2 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 10px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

.content-section > p {
  font-size: 0.9375rem;
  color: var(--ink-soft);
  line-height: 1.8;
  margin-bottom: 16px;
}

.sub-block {
  margin-bottom: 20px;
}

.sub-block:last-child {
  margin-bottom: 0;
}

.sub-block h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 6px;
}

.sub-block p {
  font-size: 0.9375rem;
  color: var(--ink-soft);
  line-height: 1.8;
}

.principle-note {
  margin-top: 8px;
  padding: 10px 14px;
  background-color: var(--notice);
  border-left: 2px solid var(--sage);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 0.875rem;
  color: var(--ink-soft);
  line-height: 1.7;
}

.two-col {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.col-block {
  padding: 18px 20px;
  background-color: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.col-block h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 10px;
}

.plain-list {
  display: grid;
  gap: 8px;
}

.plain-list li {
  font-size: 0.875rem;
  color: var(--ink-soft);
  line-height: 1.7;
  padding-left: 14px;
  position: relative;
}

.plain-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background-color: var(--blue);
}

.feedback-block {
  padding: 20px 22px;
  background-color: var(--notice);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.feedback-block h2 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 10px;
}

.feedback-block p {
  font-size: 0.9375rem;
  color: var(--ink-soft);
  line-height: 1.8;
  margin-bottom: 12px;
}

.related-links {
  margin-top: 4px;
}

.related-links-item {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 16px;
}

.related-links-label {
  font-size: 0.8125rem;
  color: var(--ink-faint);
}

/* --------------------------------------------------------------------------
   pages · 使用条款
   -------------------------------------------------------------------------- */

.article-media {
  margin: 0 0 32px;
}

.article-media img {
  aspect-ratio: 16 / 9;
  width: 100%;
  height: auto;
}

.terms-section {
  margin-bottom: 36px;
}

.terms-section h2 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 10px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

.terms-section > p {
  font-size: 0.9375rem;
  color: var(--ink-soft);
  line-height: 1.8;
  margin-bottom: 16px;
}

.terms-item {
  margin-bottom: 18px;
}

.terms-item:last-child {
  margin-bottom: 0;
}

.terms-item h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 6px;
}

.terms-item p {
  font-size: 0.9375rem;
  color: var(--ink-soft);
  line-height: 1.8;
}

.terms-links {
  margin-top: 12px;
}

/* --------------------------------------------------------------------------
   pages · 辅助功能声明
   -------------------------------------------------------------------------- */

.reading-shell {
  max-width: var(--shell-narrow);
}

.reading-shell .page-hero {
  margin-bottom: 30px;
}

.feature-list {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

.feature-item {
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.feature-item h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 6px;
}

.feature-item p {
  font-size: 0.9375rem;
  color: var(--ink-soft);
  line-height: 1.8;
}

.feature-scope {
  margin-top: 6px;
  padding-left: 14px;
  border-left: 2px solid var(--sage);
  font-size: 0.875rem;
  color: var(--ink-faint);
}

.media-figure {
  margin: 0 0 24px;
}

.media-figure img {
  aspect-ratio: 16 / 9;
  width: 100%;
  height: auto;
}

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

.limit-item {
  padding: 16px 18px;
  background-color: var(--white);
  border: 1px solid var(--line);
  border-left: 3px solid var(--clay);
  border-radius: var(--radius);
}

.limit-scene {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 4px;
}

.limit-impact {
  font-size: 0.875rem;
  color: var(--ink-soft);
  line-height: 1.7;
  margin-bottom: 4px;
}

.limit-alternative {
  font-size: 0.875rem;
  color: #7f6350;
  line-height: 1.7;
}

/* --------------------------------------------------------------------------
   pages · 404
   -------------------------------------------------------------------------- */

.error-main {
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 64px 24px 80px;
}

.error-panel {
  max-width: 640px;
  margin: 0 auto;
  text-align: center;
}

.error-code {
  font-family: var(--font-mono);
  font-size: 2.5rem;
  font-weight: 600;
  color: var(--clay);
  line-height: 1.2;
  margin-bottom: 12px;
}

.error-panel h1 {
  font-size: clamp(1.5rem, 3.4vw, 2rem);
  font-weight: 600;
  color: var(--ink);
  line-height: 1.35;
  margin-bottom: 12px;
}

.error-lead {
  font-size: 0.9375rem;
  color: var(--ink-soft);
  line-height: 1.8;
  margin-bottom: 24px;
}

.error-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 18px;
  margin-bottom: 26px;
}

.error-list a {
  font-size: 0.9375rem;
  color: var(--blue);
  padding: 6px 0;
}

.error-list a:hover {
  color: var(--ink);
}

.error-action {
  margin: 0;
}

.btn-home {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 24px;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--white);
  background-color: var(--ink);
  border: 1px solid var(--ink);
  border-radius: var(--radius-sm);
}

.btn-home:hover {
  background-color: #33393f;
  color: var(--white);
}

/* --------------------------------------------------------------------------
   responsive
   -------------------------------------------------------------------------- */

@media (max-width: 1024px) {
  .hero-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 32px;
    padding-top: 36px;
  }

  .hero-lead {
    max-width: 100%;
  }

  .hero-visual {
    max-width: 620px;
  }

  .hero-flow {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .category-track,
  .tree-grid,
  .coop-steps,
  .phase-list,
  .structure-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .service-row,
  .service-list .service-row {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
  }

  .service-field.field-link,
  .service-cell.service-cell-side {
    grid-column: 1 / -1;
  }

  .method-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
    padding: 22px;
  }

  .method-visual {
    max-width: 560px;
  }

  .version-help-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .summary-grid,
  .rule-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .version-meta {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .review-layout,
  .help-layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .review-side,
  .help-aside {
    max-width: 560px;
  }

  .footer-inner {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .footer-brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 720px) {
  .header-inner {
    padding: 0 16px;
    min-height: 60px;
    position: relative;
    flex-wrap: wrap;
  }

  .nav-toggle {
    display: block;
  }

  .site-nav {
    width: 100%;
    order: 3;
  }

  .nav-list {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    padding: 8px 0 14px;
    border-top: 1px solid var(--line);
    margin-top: 6px;
  }

  .nav-list.is-open {
    display: flex;
  }

  .nav-list a {
    display: flex;
    align-items: center;
    min-height: 44px;
    padding: 10px 12px;
    font-size: 0.9375rem;
  }

  .nav-list a.is-current {
    box-shadow: none;
    background-color: var(--paper-deep);
    border-radius: var(--radius-sm);
  }

  .inner-main,
  .hero-inner,
  .hero-flow,
  .category-bar,
  .service-overview,
  .coop-preview,
  .method-summary,
  .version-help {
    padding-left: 16px;
    padding-right: 16px;
  }

  .inner-main {
    padding-bottom: 56px;
  }

  .breadcrumb {
    padding-top: 16px;
    font-size: 0.75rem;
  }

  .page-header {
    padding: 16px 0 14px;
    margin-bottom: 24px;
  }

  .hero-inner {
    padding-top: 28px;
    padding-bottom: 28px;
    gap: 26px;
  }

  .hero-actions {
    width: 100%;
  }

  .hero-actions .btn {
    flex: 1 1 auto;
    min-width: 140px;
  }

  .hero-flow {
    grid-template-columns: minmax(0, 1fr);
    padding-bottom: 32px;
  }

  .category-bar,
  .service-overview,
  .coop-preview,
  .method-summary {
    padding-top: 32px;
  }

  .version-help {
    padding-top: 32px;
    padding-bottom: 48px;
  }

  .category-track {
    display: flex;
    overflow-x: auto;
    gap: 10px;
    padding-bottom: 6px;
    scroll-snap-type: x proximity;
    -webkit-overflow-scrolling: touch;
  }

  .category-item {
    flex: 0 0 78%;
    min-width: 220px;
    scroll-snap-align: start;
  }

  .service-row,
  .service-list .service-row {
    grid-template-columns: minmax(0, 1fr);
    gap: 14px;
    padding: 18px;
  }

  .service-field.field-link,
  .service-cell.service-cell-side {
    grid-column: auto;
  }

  .coop-steps,
  .phase-list,
  .structure-grid,
  .tree-grid,
  .summary-grid,
  .rule-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .tree-grid {
    gap: 12px;
  }

  .method-inner {
    padding: 18px;
  }

  .fit-grid,
  .feedback-entry,
  .feedback-grid,
  .two-col,
  .review-states {
    grid-template-columns: minmax(0, 1fr);
  }

  .step-item {
    grid-template-columns: 40px minmax(0, 1fr);
    gap: 12px;
    padding: 18px 0;
  }

  .step-index {
    font-size: 1.0625rem;
  }

  .field-table {
    display: block;
    border: 0;
    background-color: transparent;
    overflow: visible;
  }

  .field-table caption {
    border: 1px solid var(--line);
    border-radius: var(--radius-sm) var(--radius-sm) 0 0;
    background-color: var(--paper-deep);
  }

  .field-table thead {
    display: none;
  }

  .field-table tbody,
  .field-table tr,
  .field-table th,
  .field-table td {
    display: block;
    width: 100%;
  }

  .field-table tr {
    background-color: var(--white);
    border: 1px solid var(--line);
    border-top: 0;
    padding: 4px 0;
  }

  .field-table tr:last-child {
    border-radius: 0 0 var(--radius-sm) var(--radius-sm);
  }

  .field-table th,
  .field-table td {
    border-bottom: 0;
    padding: 8px 16px;
  }

  .field-table tbody th {
    background-color: transparent;
    padding-bottom: 2px;
  }

  .field-table td::before {
    display: block;
    font-size: 0.75rem;
    color: var(--ink-faint);
    margin-bottom: 2px;
  }

  .version-row {
    grid-template-columns: minmax(0, 1fr);
    gap: 6px;
    padding: 14px 16px;
  }

  .version-row-head {
    display: none;
  }

  .version-row span[role="cell"]::before {
    display: block;
    font-size: 0.75rem;
    color: var(--ink-faint);
    margin-bottom: 2px;
  }

  .version-meta {
    grid-template-columns: minmax(0, 1fr);
    gap: 12px;
  }

  .version-card {
    padding: 18px;
  }

  .review-side,
  .help-aside {
    max-width: 100%;
  }

  .footer-inner {
    grid-template-columns: minmax(0, 1fr);
    padding: 36px 16px 24px;
    gap: 26px;
  }

  .footer-brand-desc {
    max-width: 100%;
  }

  .footer-col a {
    min-height: 32px;
    display: inline-flex;
    align-items: center;
  }

  .footer-bottom p {
    padding: 16px 16px 24px;
  }

  .error-main {
    padding: 48px 16px 64px;
  }

  .error-list {
    gap: 4px 14px;
  }

  .error-list a {
    min-height: 40px;
    display: inline-flex;
    align-items: center;
  }
}

@media (max-width: 390px) {
  .hero h1 {
    font-size: 1.625rem;
  }

  .hero-eyebrow {
    font-size: 0.6875rem;
  }

  .category-item {
    flex-basis: 86%;
    min-width: 200px;
  }

  .hero-capabilities {
    padding: 14px;
  }

  .conclusion-box,
  .notice-box,
  .version-card,
  .feedback-block {
    padding: 18px;
  }
}

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