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

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

:root {
  --canvas: #f3f2ee;
  --surface: #ffffff;
  --ink: #1b1b19;
  --ink-soft: #6b6a64;
  --rule: #d6d4cc;
  --accent: #8c4a2f;
  --footer-ink: #2e3b36;
  --radius: 2px;
  --radius-card: 4px;
  --container: 1160px;
  --gutter: 24px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", "Courier New", monospace;
}

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

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

body {
  margin: 0;
  background: var(--canvas);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.85;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  font-weight: 600;
  line-height: 1.35;
  color: var(--ink);
}

p {
  margin: 0;
}

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

a {
  color: var(--ink);
  text-decoration: none;
}

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

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

figure {
  margin: 0;
}

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

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

strong {
  font-weight: 600;
}

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

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

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

.site-main {
  display: block;
}

.inner-main {
  padding-bottom: 72px;
}

/* 页头 */

.site-header {
  background: var(--canvas);
  border-bottom: 1px solid var(--rule);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 24px;
  min-height: 68px;
  flex-wrap: wrap;
}

.brand {
  flex: none;
  font-size: 20px;
  font-weight: 600;
  line-height: 1.2;
  color: var(--ink);
  padding: 8px 0;
}

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

.primary-nav {
  margin-left: auto;
}

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

.site-nav a {
  display: inline-block;
  padding: 10px 14px;
  font-size: 15px;
  line-height: 1.4;
  color: var(--ink-soft);
  border-bottom: 2px solid transparent;
}

.site-nav a:hover {
  color: var(--ink);
}

.site-nav a.is-current {
  color: var(--ink);
  font-weight: 600;
  border-bottom-color: var(--accent);
}

.nav-toggle {
  display: none;
  margin-left: auto;
  min-width: 48px;
  min-height: 48px;
  padding: 0 14px;
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  font-size: 14px;
  cursor: pointer;
}

.nav-toggle:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.header-note {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter) 12px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--ink-soft);
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
}

/* 页脚 */

.site-footer {
  margin-top: 0;
  background: var(--footer-ink);
  color: #e8e6e0;
}

.footer-top {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 32px;
  padding-top: 52px;
  padding-bottom: 40px;
}

.footer-col h2 {
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: #b9bdb6;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-col a {
  display: inline-block;
  padding: 3px 0;
  font-size: 15px;
  line-height: 1.6;
  color: #e8e6e0;
}

.footer-col a:hover {
  color: #ffffff;
  text-decoration: underline;
  text-underline-offset: 4px;
}

.footer-bottom {
  padding-top: 24px;
  padding-bottom: 40px;
  border-top: 1px solid rgba(232, 230, 224, 0.24);
}

.footer-brand {
  font-size: 16px;
  font-weight: 600;
  color: #ffffff;
}

.footer-desc {
  max-width: 720px;
  margin-top: 8px;
  font-size: 14px;
  line-height: 1.8;
  color: #c3c7c0;
}

.footer-copy {
  margin-top: 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: #9aa09a;
}

/* 内页统一标题区 */

.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  max-width: var(--container);
  margin: 0 auto;
  padding: 20px var(--gutter) 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
}

.breadcrumb a {
  color: var(--ink-soft);
  padding: 4px 0;
}

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

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

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

.page-header {
  max-width: var(--container);
  margin: 0 auto;
  padding: 20px var(--gutter) 24px;
  border-bottom: 1px solid var(--rule);
  margin-bottom: 40px;
}

.page-title {
  font-size: 34px;
  font-weight: 600;
  line-height: 1.3;
  color: var(--ink);
  max-width: 860px;
}

/* 元数据行 */

.meta-row,
.meta-line {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
}

.meta-code {
  font-variant-numeric: tabular-nums;
  color: var(--accent);
  font-weight: 600;
}

.meta-label,
.meta-name {
  color: var(--ink-soft);
}

.meta-sep,
.meta-divider {
  color: var(--rule);
}

.meta-status,
.meta-state {
  color: var(--accent);
}

.page-lead {
  max-width: 720px;
  margin-top: 16px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink-soft);
}

/* 通用按钮 */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 10px 22px;
  border-radius: var(--radius);
  border: 1px solid transparent;
  font-size: 15px;
  font-weight: 500;
  line-height: 1.4;
  transition: background-color 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 10px 22px;
  background: var(--ink);
  color: #ffffff;
  border: 1px solid var(--ink);
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 500;
  line-height: 1.4;
  transition: background-color 0.18s ease, border-color 0.18s ease;
}

.btn-primary:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: #ffffff;
}

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

.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
}

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

.section-head {
  max-width: 720px;
  margin-bottom: 28px;
}

.section-head h2 {
  font-size: 22px;
  line-height: 1.4;
}

.section-head p {
  margin-top: 10px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.section-intro {
  max-width: 720px;
  margin-top: 10px;
  margin-bottom: 28px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.section-note {
  max-width: 720px;
  margin: 10px 0 24px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
}

/* 图片容器 */

.hero-media,
.media-figure,
.section-media,
.doc-figure,
.side-figure {
  overflow: hidden;
  border: 1px solid var(--rule);
  border-radius: var(--radius-card);
  background: var(--surface);
}

.hero-media img,
.media-figure img,
.section-media img,
.doc-figure img,
.side-figure img {
  width: 100%;
  height: auto;
  object-fit: cover;
}

.hero-media figcaption,
.media-figure figcaption,
.section-media figcaption,
.doc-figure figcaption,
.side-figure figcaption {
  padding: 10px 14px;
  border-top: 1px solid var(--rule);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  line-height: 1.6;
  color: var(--ink-soft);
}

/* 数据表 */

.data-table {
  width: 100%;
  border: 1px solid var(--rule);
  background: var(--surface);
  font-size: 15px;
  line-height: 1.7;
}

.data-table caption {
  caption-side: top;
  padding: 0 0 12px;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
}

.data-table thead th {
  padding: 12px 14px;
  text-align: left;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--ink-soft);
  background: var(--canvas);
  border-bottom: 1px solid var(--rule);
}

.data-table tbody th {
  padding: 14px;
  text-align: left;
  font-weight: 600;
  color: var(--ink);
  border-bottom: 1px solid var(--rule);
  border-right: 1px solid var(--rule);
  background: #faf9f6;
}

.data-table tbody td {
  padding: 14px;
  vertical-align: top;
  color: var(--ink);
  border-bottom: 1px solid var(--rule);
}

.data-table tbody tr:last-child th,
.data-table tbody tr:last-child td {
  border-bottom: none;
}

/* 相关入口条 */

.related-bar {
  padding: 32px 0;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  background: #eeede8;
}

.related-bar .container {
  max-width: var(--container);
}

.related-bar h2 {
  margin-bottom: 16px;
  font-size: 18px;
}

.related-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 28px;
}

.related-list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px;
  min-width: 220px;
  flex: 1 1 260px;
}

.related-list a {
  font-size: 15px;
  font-weight: 500;
  color: var(--ink);
  border-bottom: 1px solid var(--accent);
  padding-bottom: 1px;
}

.related-list a:hover {
  color: var(--accent);
}

.related-list span,
.related-list p,
.related-desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
}

/* 通用清单（404 与页脚补充） */

.link-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.link-list a {
  display: inline-block;
  padding: 4px 0;
  font-size: 15px;
  color: var(--ink);
  border-bottom: 1px solid transparent;
}

.link-list a:hover {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

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

.home-main {
  padding-bottom: 0;
}

/* 首屏 */

.hero {
  padding: 48px 0 56px;
  border-bottom: 1px solid var(--rule);
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 0.86fr);
  gap: 48px;
  align-items: start;
}

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

.hero-copy h1 {
  margin-top: 18px;
  font-size: 38px;
  line-height: 1.28;
  max-width: 620px;
}

.hero-lead {
  max-width: 560px;
  margin-top: 18px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink-soft);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.hero-media {
  min-width: 0;
}

.hero-media img {
  aspect-ratio: 4 / 3;
}

/* 服务周期横带 */

.cycle-band {
  padding: 56px 0;
  background: var(--surface);
  border-bottom: 1px solid var(--rule);
}

.cycle-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  border-top: 1px solid var(--rule);
  border-left: 1px solid var(--rule);
}

.cycle-item {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 22px 20px 24px;
  border-right: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  min-width: 0;
}

.cycle-code {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  font-variant-numeric: tabular-nums;
  color: var(--accent);
}

.cycle-item h3 {
  font-size: 17px;
}

.cycle-item p {
  flex: 1;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.cycle-item a {
  align-self: flex-start;
  font-size: 14px;
  color: var(--ink);
  border-bottom: 1px solid var(--rule);
  padding-bottom: 2px;
}

.cycle-item a:hover {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

/* 服务项目编号清单 */

.service-index {
  padding: 56px 0;
  border-bottom: 1px solid var(--rule);
}

.index-list {
  border-top: 1px solid var(--rule);
}

.index-row {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr) auto;
  gap: 20px;
  align-items: start;
  padding: 22px 0;
  border-bottom: 1px solid var(--rule);
}

.index-code {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  font-variant-numeric: tabular-nums;
  color: var(--accent);
  padding-top: 4px;
}

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

.index-body h3 {
  font-size: 18px;
}

.index-body p {
  margin-top: 6px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.index-row > a {
  align-self: center;
  padding: 8px 0;
  font-size: 14px;
  font-weight: 500;
  color: var(--ink);
  border-bottom: 1px solid var(--rule);
  white-space: nowrap;
}

.index-row > a:hover {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

/* 核查路径预览 */

.triage-preview {
  padding: 56px 0;
  background: var(--surface);
  border-bottom: 1px solid var(--rule);
}

.triage-list {
  display: flex;
  flex-direction: column;
}

.triage-row {
  display: grid;
  grid-template-columns: minmax(0, 0.42fr) minmax(0, 1fr) auto;
  gap: 20px;
  align-items: baseline;
  padding: 20px 0;
  border-bottom: 1px solid var(--rule);
}

.triage-row:first-child {
  border-top: 1px solid var(--rule);
}

.triage-row h3 {
  font-size: 17px;
}

.triage-row p {
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.triage-row a {
  padding: 8px 0;
  font-size: 14px;
  font-weight: 500;
  color: var(--ink);
  border-bottom: 1px solid var(--rule);
  white-space: nowrap;
}

.triage-row a:hover {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

/* 交付档案缩略图带 */

.deliverables {
  padding: 56px 0;
  border-bottom: 1px solid var(--rule);
}

.thumb-band {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}

.thumb-item {
  min-width: 0;
}

.thumb-item figure {
  border: 1px solid var(--rule);
  border-radius: var(--radius-card);
  background: var(--surface);
  overflow: hidden;
}

.thumb-item img {
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.thumb-item figcaption {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px;
  padding: 12px 14px;
  border-top: 1px solid var(--rule);
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.thumb-code {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  font-variant-numeric: tabular-nums;
  color: var(--accent);
}

/* 常见问题折叠 */

.faq {
  padding: 56px 0;
  background: var(--surface);
  border-bottom: 1px solid var(--rule);
}

.faq-list {
  max-width: 820px;
  border-top: 1px solid var(--rule);
}

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

.faq-item summary {
  position: relative;
  padding: 18px 44px 18px 0;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.7;
  cursor: pointer;
  list-style: none;
}

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

.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 4px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--accent);
}

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

.faq-item summary:hover {
  color: var(--accent);
}

.faq-item p {
  padding: 0 44px 20px 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-soft);
}

/* 方法资料索引行 */

.reference-index {
  padding: 56px 0 64px;
}

.ref-list {
  border-top: 1px solid var(--rule);
}

.ref-row {
  display: grid;
  grid-template-columns: minmax(0, 0.6fr) minmax(0, 1fr) auto;
  gap: 20px;
  align-items: baseline;
  padding: 20px 0;
  border-bottom: 1px solid var(--rule);
}

.ref-row h3 {
  font-size: 17px;
}

.ref-row p {
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.ref-row a {
  padding: 8px 0;
  font-size: 14px;
  font-weight: 500;
  color: var(--ink);
  border-bottom: 1px solid var(--rule);
  white-space: nowrap;
}

.ref-row a:hover {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

/* --------------------------------------------------------------------------
   pages · 服务项目
   -------------------------------------------------------------------------- */

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

.page-hero .container {
  padding-top: 0;
}

.page-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 48px;
  align-items: start;
  padding-top: 8px;
}

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

.layout-aside {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.aside-card {
  padding: 22px 20px;
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius-card);
}

.aside-card h2 {
  font-size: 16px;
  margin-bottom: 10px;
}

.aside-card p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.aside-card ul {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 12px;
}

.aside-card li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.aside-card li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 1px;
  background: var(--accent);
}

.aside-links {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 12px;
}

.aside-links a {
  display: inline-block;
  padding: 6px 0;
  font-size: 14px;
  color: var(--ink);
  border-bottom: 1px solid var(--rule);
}

.aside-links a:hover {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

/* 场景标签筛选条 */

.filter-bar {
  padding-bottom: 28px;
  border-bottom: 1px solid var(--rule);
  margin-bottom: 32px;
}

.filter-bar h2 {
  font-size: 20px;
}

.filter-note {
  margin-top: 8px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.tag-btn {
  min-height: 44px;
  padding: 8px 18px;
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: 999px;
  font-size: 14px;
  color: var(--ink-soft);
  cursor: pointer;
  transition: color 0.18s ease, border-color 0.18s ease, background-color 0.18s ease;
}

.tag-btn:hover {
  color: var(--ink);
  border-color: var(--accent);
}

.tag-btn.is-active {
  background: var(--ink);
  border-color: var(--ink);
  color: #ffffff;
}

/* 监测项清单 */

.service-list {
  margin-bottom: 40px;
}

.service-list > h2 {
  font-size: 20px;
  margin-bottom: 20px;
}

.service-item {
  padding: 24px 0;
  border-top: 1px solid var(--rule);
}

.service-item:last-child {
  border-bottom: 1px solid var(--rule);
}

.item-code {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  font-variant-numeric: tabular-nums;
  color: var(--accent);
}

.service-item h3 {
  margin-top: 6px;
  font-size: 19px;
}

.item-scene {
  margin-top: 8px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-soft);
}

.item-block {
  margin-top: 18px;
  padding-left: 16px;
  border-left: 2px solid var(--rule);
}

.item-block h4 {
  font-size: 14px;
  letter-spacing: 0.02em;
  color: var(--ink);
}

.item-block p {
  margin-top: 6px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-soft);
}

/* 工作现场图 */

.work-media {
  margin-bottom: 40px;
}

.work-media h2 {
  font-size: 20px;
}

.media-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
  margin-top: 20px;
}

.media-figure img {
  aspect-ratio: 3 / 2;
}

/* 适用对照 */

.compare-block {
  margin-bottom: 8px;
}

.compare-block h2 {
  font-size: 20px;
  margin-bottom: 20px;
}

.compare-cols {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}

.compare-col {
  padding: 20px;
  border: 1px solid var(--rule);
  border-radius: var(--radius-card);
  background: var(--surface);
}

.compare-col h3 {
  font-size: 16px;
  margin-bottom: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--rule);
}

.compare-col ul {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.compare-col li {
  position: relative;
  padding-left: 18px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.compare-col li::before {
  position: absolute;
  left: 0;
  top: 0;
  font-family: var(--font-mono);
  font-size: 13px;
}

.compare-yes li::before {
  content: "+";
  color: var(--accent);
}

.compare-no li::before {
  content: "−";
  color: var(--ink-soft);
}

/* --------------------------------------------------------------------------
   pages · 归档周期
   -------------------------------------------------------------------------- */

.page-head {
  padding-bottom: 32px;
  border-bottom: 1px solid var(--rule);
  margin-bottom: 40px;
}

.page-plans .section {
  padding-bottom: 48px;
  margin-bottom: 48px;
  border-bottom: 1px solid var(--rule);
}

.page-plans .section:last-of-type {
  border-bottom: none;
  margin-bottom: 0;
}

.page-plans .section > h2 {
  font-size: 22px;
}

.timeline {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  border-top: 1px solid var(--rule);
  border-left: 1px solid var(--rule);
}

.timeline-node {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 20px 18px 22px;
  border-right: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  min-width: 0;
}

.timeline-node .meta-code {
  color: var(--accent);
}

.timeline-node h3 {
  font-size: 16px;
}

.timeline-node > p:last-child {
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.section-media {
  margin-top: 28px;
  max-width: 720px;
}

.section-media img {
  aspect-ratio: 16 / 9;
}

.table-wrap {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.pitfall-list {
  display: flex;
  flex-direction: column;
}

.pitfall-item {
  display: grid;
  grid-template-columns: minmax(0, 0.42fr) minmax(0, 1fr);
  gap: 20px;
  padding: 18px 0;
  border-bottom: 1px solid var(--rule);
}

.pitfall-item:first-child {
  border-top: 1px solid var(--rule);
}

.pitfall-item h3 {
  font-size: 16px;
}

.pitfall-item p {
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.section-related {
  padding-top: 8px;
}

.section-related > h2 {
  font-size: 20px;
  margin-bottom: 16px;
}

/* --------------------------------------------------------------------------
   pages · 核查路径
   -------------------------------------------------------------------------- */

.page-title-section {
  padding-bottom: 32px;
  border-bottom: 1px solid var(--rule);
  margin-bottom: 40px;
}

.page-triage .page-layout {
  padding-top: 0;
}

.page-main-col {
  min-width: 0;
}

.page-side-col {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.section-title {
  font-size: 22px;
  margin-bottom: 10px;
}

.triage-paths,
.triage-materials,
.triage-scope {
  padding-bottom: 44px;
  margin-bottom: 44px;
  border-bottom: 1px solid var(--rule);
}

.triage-scope {
  border-bottom: none;
  margin-bottom: 0;
}

.triage-card {
  padding: 22px 22px 20px;
  margin-top: 20px;
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius-card);
}

.triage-card-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--rule);
  margin-bottom: 14px;
}

.triage-code {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  font-variant-numeric: tabular-nums;
  color: var(--accent);
}

.triage-card-head h3 {
  font-size: 18px;
  flex: 1 1 auto;
}

.triage-tag {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  padding: 2px 8px;
  border: 1px solid var(--rule);
  border-radius: 999px;
  color: var(--ink-soft);
}

.triage-basis,
.triage-action {
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--ink-soft);
}

.triage-action {
  margin-top: 10px;
}

.triage-basis strong,
.triage-action strong {
  color: var(--ink);
  margin-right: 4px;
}

.triage-next {
  margin-top: 14px;
}

.triage-next a {
  display: inline-block;
  padding: 6px 0;
  font-size: 14px;
  font-weight: 500;
  color: var(--ink);
  border-bottom: 1px solid var(--accent);
}

.triage-next a:hover {
  color: var(--accent);
}

.material-group {
  margin-top: 22px;
}

.material-group h3 {
  font-size: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--rule);
}

.material-list {
  margin: 12px 0 0;
}

.material-list dt {
  font-size: 14.5px;
  font-weight: 600;
  line-height: 1.7;
}

.material-list dd {
  margin: 2px 0 12px;
  padding-left: 14px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
  border-left: 1px solid var(--rule);
}

.scope-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 18px;
}

.scope-list li {
  padding: 14px 16px;
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius-card);
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.scope-list strong {
  display: block;
  color: var(--ink);
  margin-bottom: 2px;
}

.scope-note {
  margin-top: 16px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.scope-note a {
  color: var(--ink);
  border-bottom: 1px solid var(--accent);
}

.scope-note a:hover {
  color: var(--accent);
}

.side-card {
  padding: 22px 20px;
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius-card);
}

.side-title {
  font-size: 16px;
  margin-bottom: 10px;
}

.side-text {
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.side-steps {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 14px;
  counter-reset: side-step;
}

.side-steps li {
  position: relative;
  counter-increment: side-step;
  padding-left: 26px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.side-steps li::before {
  content: counter(side-step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 1px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--accent);
}

.side-links {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 12px;
}

.side-links a {
  display: inline-block;
  padding: 6px 0;
  font-size: 14px;
  color: var(--ink);
  border-bottom: 1px solid var(--rule);
}

.side-links a:hover {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.side-figure img {
  aspect-ratio: 4 / 3;
}

/* --------------------------------------------------------------------------
   pages · 服务流程
   -------------------------------------------------------------------------- */

.page-process .page-head {
  padding-bottom: 32px;
  border-bottom: 1px solid var(--rule);
  margin-bottom: 40px;
}

.flow-strip {
  padding-bottom: 48px;
  margin-bottom: 48px;
  border-bottom: 1px solid var(--rule);
}

.flow-strip h2,
.process-table h2,
.prep-checklist h2 {
  font-size: 22px;
}

.flow-list {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 0;
  border-top: 1px solid var(--rule);
  border-left: 1px solid var(--rule);
}

.flow-item {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 20px 16px 22px;
  border-right: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  min-width: 0;
}

.flow-code {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  font-variant-numeric: tabular-nums;
  color: var(--accent);
}

.flow-item h3 {
  font-size: 16px;
}

.flow-item p {
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.process-table {
  padding-bottom: 48px;
  margin-bottom: 48px;
  border-bottom: 1px solid var(--rule);
}

.process-table .media-figure {
  max-width: 720px;
  margin-bottom: 28px;
}

.process-table .media-figure img {
  aspect-ratio: 16 / 9;
}

/* 表格容器：桌面正常表格，窄屏横向可滑 */

.process-table .data-table {
  display: table;
}

.prep-checklist {
  padding-bottom: 48px;
}

.check-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  border-top: 1px solid var(--rule);
  margin-top: 20px;
}

.check-list li {
  padding: 16px 0;
  border-bottom: 1px solid var(--rule);
}

.check-list li h3 {
  font-size: 16px;
}

.check-list li p {
  margin-top: 6px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-soft);
}

/* --------------------------------------------------------------------------
   pages · 方法资料
   -------------------------------------------------------------------------- */

.page-references .page-hero {
  padding-bottom: 32px;
  border-bottom: 1px solid var(--rule);
  margin-bottom: 40px;
}

.doc-body {
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.doc-section {
  padding-bottom: 48px;
  margin-bottom: 48px;
  border-bottom: 1px solid var(--rule);
}

.doc-section > h2 {
  font-size: 22px;
  margin-bottom: 10px;
}

.doc-section > p {
  max-width: 720px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-soft);
}

.table-scroll {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin-top: 22px;
}

.doc-table {
  min-width: 640px;
  border: 1px solid var(--rule);
  background: var(--surface);
  font-size: 14.5px;
  line-height: 1.7;
}

.doc-table caption {
  caption-side: top;
  padding: 0 0 12px;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
}

.doc-table thead th {
  padding: 12px 14px;
  text-align: left;
  font-size: 13px;
  font-weight: 600;
  color: var(--ink-soft);
  background: var(--canvas);
  border-bottom: 1px solid var(--rule);
  white-space: nowrap;
}

.doc-table tbody td {
  padding: 13px 14px;
  vertical-align: top;
  border-bottom: 1px solid var(--rule);
  color: var(--ink);
}

.doc-table tbody tr:last-child td {
  border-bottom: none;
}

.doc-figure {
  margin-top: 24px;
  max-width: 720px;
}

.doc-figure img {
  aspect-ratio: 16 / 9;
}

.doc-block {
  margin-top: 26px;
  padding-left: 16px;
  border-left: 2px solid var(--rule);
}

.doc-block h3 {
  font-size: 16px;
}

.doc-block p {
  margin-top: 6px;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--ink-soft);
}

.page-references .check-list {
  counter-reset: self-check;
}

.page-references .check-list li {
  position: relative;
  counter-increment: self-check;
  padding-left: 42px;
  font-size: 15px;
  line-height: 1.8;
}

.page-references .check-list li::before {
  content: counter(self-check, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--accent);
}

.check-action {
  display: block;
  margin-top: 4px;
  font-size: 13.5px;
  color: var(--ink-soft);
}

.doc-body .related-bar {
  padding: 0;
  border: none;
  background: transparent;
  margin-bottom: 0;
}

.doc-body .related-bar h2 {
  font-size: 18px;
  margin-bottom: 14px;
}

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

.error-main {
  padding: 72px 0 80px;
}

.error-inner {
  max-width: 720px;
}

.error-inner h1 {
  margin-top: 16px;
  font-size: 34px;
  line-height: 1.3;
}

.error-lead {
  margin-top: 14px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink-soft);
}

.error-action {
  margin-top: 24px;
}

.error-section {
  margin-top: 44px;
  padding-top: 28px;
  border-top: 1px solid var(--rule);
}

.error-section h2 {
  font-size: 18px;
  margin-bottom: 14px;
}

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

@media (max-width: 960px) {
  .hero-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 32px;
  }

  .hero-copy h1 {
    font-size: 32px;
  }

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

  .cycle-list,
  .timeline {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .flow-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-layout {
    grid-template-columns: minmax(0, 1fr);
    gap: 36px;
  }

  .layout-aside,
  .page-side-col {
    max-width: 620px;
  }

  .footer-top {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 28px;
  }
}

@media (max-width: 640px) {
  :root {
    --gutter: 18px;
  }

  body {
    font-size: 15.5px;
  }

  .header-inner {
    min-height: 60px;
    gap: 12px;
  }

  .brand {
    font-size: 18px;
  }

  .nav-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .primary-nav {
    flex: 1 1 100%;
    margin-left: 0;
    order: 3;
  }

  .site-nav ul {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px 0 12px;
    border-top: 1px solid var(--rule);
  }

  .site-nav ul.is-open {
    display: flex;
  }

  .site-nav a {
    display: flex;
    align-items: center;
    min-height: 48px;
    padding: 10px 4px;
    border-bottom: 1px solid var(--rule);
    font-size: 16px;
  }

  .site-nav a.is-current {
    border-bottom-color: var(--accent);
  }

  .header-note {
    font-size: 12px;
    padding-bottom: 10px;
  }

  .page-title {
    font-size: 24px;
    line-height: 1.4;
  }

  .page-header {
    padding-top: 16px;
    padding-bottom: 18px;
    margin-bottom: 28px;
  }

  .breadcrumb {
    padding-top: 16px;
    font-size: 11.5px;
  }

  .hero {
    padding: 32px 0 40px;
  }

  .hero-copy h1 {
    font-size: 26px;
    line-height: 1.38;
  }

  .hero-lead {
    font-size: 15.5px;
  }

  .hero-actions {
    gap: 10px;
  }

  .hero-actions .btn {
    flex: 1 1 160px;
  }

  .cycle-band,
  .service-index,
  .triage-preview,
  .deliverables,
  .faq,
  .reference-index {
    padding: 40px 0;
  }

  .cycle-list,
  .timeline,
  .flow-list {
    grid-template-columns: minmax(0, 1fr);
  }

  .index-row {
    grid-template-columns: 52px minmax(0, 1fr);
    gap: 12px;
    padding: 18px 0;
  }

  .index-row > a {
    grid-column: 2;
    justify-self: start;
    white-space: normal;
  }

  .triage-row,
  .ref-row,
  .pitfall-item {
    grid-template-columns: minmax(0, 1fr);
    gap: 8px;
    padding: 16px 0;
  }

  .triage-row a,
  .ref-row a {
    justify-self: start;
    white-space: normal;
  }

  .thumb-band {
    grid-template-columns: minmax(0, 1fr);
    gap: 20px;
  }

  .faq-item summary {
    padding-right: 36px;
    font-size: 15.5px;
  }

  .faq-item p {
    padding-right: 16px;
  }

  .page-layout {
    gap: 28px;
  }

  .compare-cols,
  .media-row {
    grid-template-columns: minmax(0, 1fr);
    gap: 18px;
  }

  .tag-row {
    flex-wrap: nowrap;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    padding-bottom: 6px;
    margin-top: 14px;
  }

  .tag-btn {
    flex: none;
    white-space: nowrap;
  }

  .service-item {
    padding: 20px 0;
  }

  .item-block {
    padding-left: 12px;
  }

  .triage-card {
    padding: 18px 16px 16px;
  }

  .triage-card-head {
    gap: 8px;
  }

  .triage-card-head h3 {
    flex: 1 1 100%;
  }

  .material-list dd {
    padding-left: 10px;
  }

  .flow-item {
    padding: 16px 14px 18px;
  }

  /* 服务流程对照表在窄屏改为纵向卡片，避免横向溢出 */

  .process-table .data-table {
    display: block;
    width: 100%;
    border: none;
    background: transparent;
    font-size: 14.5px;
  }

  .process-table .data-table caption {
    display: block;
    padding-bottom: 10px;
  }

  .process-table .data-table thead {
    display: none;
  }

  .process-table .data-table tbody {
    display: block;
    width: 100%;
  }

  .process-table .data-table tbody tr {
    display: block;
    width: 100%;
    margin-bottom: 14px;
    padding: 14px 16px;
    background: var(--surface);
    border: 1px solid var(--rule);
    border-radius: var(--radius-card);
  }

  .process-table .data-table tbody th {
    display: block;
    width: 100%;
    padding: 0 0 10px;
    margin-bottom: 10px;
    border-bottom: 1px solid var(--rule);
    border-right: none;
    background: transparent;
    font-size: 15px;
  }

  .process-table .data-table tbody td {
    display: block;
    width: 100%;
    padding: 0 0 8px;
    border-bottom: none;
    font-size: 14px;
    line-height: 1.75;
  }

  .process-table .data-table tbody td:last-child {
    padding-bottom: 0;
  }

  .process-table .data-table tbody td:nth-child(1)::before {
    content: "客户方动作";
    display: block;
    margin-bottom: 2px;
    font-family: var(--font-mono);
    font-size: 11.5px;
    letter-spacing: 0.06em;
    color: var(--ink-soft);
  }

  .process-table .data-table tbody td:nth-child(2)::before {
    content: "我方动作";
    display: block;
    margin-bottom: 2px;
    font-family: var(--font-mono);
    font-size: 11.5px;
    letter-spacing: 0.06em;
    color: var(--ink-soft);
  }

  .process-table .data-table tbody td:nth-child(3)::before {
    content: "确认方式";
    display: block;
    margin-bottom: 2px;
    font-family: var(--font-mono);
    font-size: 11.5px;
    letter-spacing: 0.06em;
    color: var(--ink-soft);
  }

  .doc-table {
    min-width: 560px;
  }

  .doc-body {
    max-width: none;
  }

  .doc-section {
    padding-bottom: 36px;
    margin-bottom: 36px;
  }

  .doc-section > h2 {
    font-size: 20px;
  }

  .page-references .check-list li {
    padding-left: 34px;
  }

  .footer-top {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px;
    padding-top: 40px;
    padding-bottom: 28px;
  }

  .footer-col a {
    min-height: 44px;
    display: flex;
    align-items: center;
    padding: 6px 0;
  }

  .footer-bottom {
    padding-bottom: 32px;
  }

  .error-main {
    padding: 48px 0 56px;
  }

  .error-inner h1 {
    font-size: 24px;
  }

  .related-list {
    flex-direction: column;
    gap: 12px;
  }

  .related-list li {
    min-width: 0;
    flex: 1 1 auto;
  }
}

@media (max-width: 400px) {
  :root {
    --gutter: 16px;
  }

  .hero-copy h1 {
    font-size: 24px;
  }

  .page-title {
    font-size: 22px;
  }

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

/* 程序验收反馈：移动端防溢出 */
@media (max-width: 768px) {
  .site-main,
  .site-main * {
    min-width: 0;
    max-width: 100%;
  }

  .site-main :is(h1, h2, h3, h4, p, a, span) {
    overflow-wrap: anywhere;
  }
}