/* ==========================================================================
   吃瓜网站 · 580rx.com · 全站样式
   分组：base / layout / components / pages / responsive
   ========================================================================== */

/* ==========================================================================
   base
   ========================================================================== */

:root {
  --ink: #1F2A24;
  --ink-soft: #3C4A42;
  --ink-mute: #6B7770;
  --paper: #FFFFFF;
  --paper-warm: #F5F2EA;
  --line: #DCD8CC;
  --line-soft: #EAE6DB;
  --moss: #4F7A4A;
  --ochre: #A9713F;
  --sky: #3F6F86;
  --clay: #B3543F;
  --serif: "Songti SC", "Noto Serif CJK SC", "Source Han Serif SC", "STSong", serif;
  --sans: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --mono: ui-monospace, "SF Mono", "Cascadia Mono", "Roboto Mono", Consolas, monospace;
  --wrap: 1120px;
  --gutter: 24px;
  --radius: 4px;
}

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

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

body.site-body {
  margin: 0;
  padding: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.85;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4 {
  margin: 0;
  font-family: var(--serif);
  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;
  transition: color 0.18s ease;
}

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

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;
  background: none;
  border: 0;
  cursor: pointer;
}

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

.skip-link {
  position: absolute;
  top: -100px;
  left: 12px;
  z-index: 200;
  padding: 10px 18px;
  background: var(--ink);
  color: #fff;
  border-radius: var(--radius);
  font-size: 14px;
  transform: translateY(-120%);
  transition: transform 0.2s ease;
}

.skip-link:focus {
  top: 12px;
  transform: translateY(0);
  color: #fff;
}


/* ==========================================================================
   layout · 全站骨架
   ========================================================================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--paper);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 var(--gutter);
  min-height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: flex;
  flex-direction: column;
  gap: 2px;
  flex-shrink: 0;
  color: var(--ink);
}

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

.brand-name {
  font-family: var(--serif);
  font-size: 21px;
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: 0.01em;
}

.brand-tagline {
  font-size: 12px;
  line-height: 1.4;
  color: var(--ink-mute);
  letter-spacing: 0.02em;
}

.site-nav {
  flex: 1 1 auto;
  display: flex;
  justify-content: flex-end;
}

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

.nav-list > li {
  display: flex;
}

.nav-list a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 12px;
  font-size: 14px;
  color: var(--ink-soft);
  position: relative;
}

.nav-list a::after {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 10px;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.22s ease;
}

.nav-list a:hover::after,
.nav-list a.is-current::after {
  transform: scaleX(1);
}

.nav-list a.is-current {
  color: var(--ink);
  font-weight: 600;
}

.nav-list a:hover {
  color: var(--clay);
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 0;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
}

.nav-toggle-bar {
  display: block;
  width: 20px;
  height: 1.5px;
  background: var(--ink);
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

.site-main {
  display: block;
  width: 100%;
}

.inner-main {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 var(--gutter) 72px;
}

/* 面包屑 */

.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  padding: 22px 0 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--ink-mute);
}

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

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

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

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

/* 页面标题区 */

.page-header {
  padding: 14px 0 18px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 32px;
}

.page-title {
  font-size: 32px;
  font-weight: 600;
  line-height: 1.35;
  color: var(--ink);
  letter-spacing: 0;
}

.page-lead {
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-soft);
  max-width: 42em;
}

/* 内页主栏 + 侧栏 */

.page-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 260px;
  gap: 48px;
  align-items: start;
}

.page-layout.content-flow,
.page-layout.page-layout-single,
.page-layout.layout-single {
  grid-template-columns: minmax(0, 1fr);
  max-width: 100%;
}

.page-layout.layout-main-aside {
  grid-template-columns: minmax(0, 1fr) 260px;
}

/* 页脚 */

.site-footer {
  background: var(--paper-warm);
  border-top: 1px solid var(--line);
  margin-top: 24px;
}

.footer-inner {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 48px var(--gutter) 32px;
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
  gap: 48px;
  align-items: start;
}

.footer-brand-name {
  font-family: var(--serif);
  font-size: 20px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--ink);
  margin-bottom: 10px;
}

.footer-desc {
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
  max-width: 34em;
}

.footer-note {
  margin-top: 12px;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--ink-mute);
}

.footer-nav {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 32px;
}

.footer-group-title {
  font-family: var(--sans);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--ink-mute);
  margin-bottom: 12px;
}

.footer-group ul {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.footer-group a {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  font-size: 14px;
  color: var(--ink-soft);
  position: relative;
}

.footer-group a:hover {
  color: var(--clay);
}

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

.footer-bottom p {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 18px var(--gutter) 26px;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--ink-mute);
}


/* ==========================================================================
   components · 通用组件
   ========================================================================== */

/* 按钮 */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 22px;
  border-radius: var(--radius);
  font-size: 14.5px;
  font-weight: 500;
  line-height: 1.4;
  border: 1px solid transparent;
  transition: background-color 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

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

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

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

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

/* 区块标题 */

.section-head {
  margin-bottom: 22px;
  max-width: 46em;
}

.section-head h2 {
  font-size: 24px;
  line-height: 1.4;
  margin-bottom: 8px;
}

.section-lead {
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.section-title {
  font-size: 23px;
  line-height: 1.4;
  margin-bottom: 10px;
}

.section-intro {
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--ink-soft);
  max-width: 48em;
  margin-bottom: 22px;
}

.section-intro a {
  color: var(--clay);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* 标本图框 */

.specimen-figure {
  margin: 0 0 28px;
}

.specimen-frame {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper-warm);
  padding: 8px;
  overflow: hidden;
}

.specimen-frame img {
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: 2px;
}

.specimen-caption {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-top: 10px;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--ink-mute);
}

.specimen-no,
.specimen-num,
.specimen-index,
.fig-no,
.caption-index {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--ink-mute);
  flex-shrink: 0;
}

.specimen-text,
.fig-desc,
.caption-text {
  flex: 1 1 auto;
}

/* 分类色块 */

.swatch {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 2px;
  flex-shrink: 0;
}

.swatch-observe { background: var(--moss); }
.swatch-plan    { background: var(--ochre); }
.swatch-draft   { background: var(--sky); }
.swatch-review  { background: var(--clay); }

/* 折叠问答（通用） */

.faq-item {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
  margin-bottom: 10px;
  overflow: hidden;
}

.faq-item[open] {
  border-color: var(--ink);
}

.faq-summary {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px 18px;
  min-height: 52px;
  cursor: pointer;
  list-style: none;
  font-size: 15px;
  line-height: 1.65;
  color: var(--ink);
  position: relative;
  padding-right: 44px;
}

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

.faq-summary::after {
  content: "+";
  position: absolute;
  right: 18px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--mono);
  font-size: 18px;
  color: var(--ink-mute);
  transition: transform 0.2s ease;
}

.faq-item[open] .faq-summary::after {
  content: "−";
  color: var(--clay);
}

.faq-summary:hover {
  background: var(--paper-warm);
}

.faq-question {
  flex: 1 1 auto;
  font-weight: 500;
}

.faq-tag {
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
  padding: 1px 8px;
  border-radius: 2px;
  background: var(--paper-warm);
  font-size: 11.5px;
  font-weight: 400;
  letter-spacing: 0.04em;
  color: var(--ink-mute);
  line-height: 1.8;
}

.faq-answer {
  padding: 0 18px 18px;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--ink-soft);
  border-top: 1px solid var(--line-soft);
  padding-top: 14px;
  margin-top: 0;
}

/* 清单通用 */

.checklist {
  display: flex;
  flex-direction: column;
  gap: 0;
  border-top: 1px solid var(--line);
}

.check-row {
  display: grid;
  grid-template-columns: 22px minmax(120px, 0.8fr) minmax(0, 1.6fr);
  gap: 14px;
  align-items: start;
  padding: 14px 0;
  border-bottom: 1px solid var(--line-soft);
  font-size: 14.5px;
  line-height: 1.7;
}

.check-box {
  display: inline-block;
  width: 14px;
  height: 14px;
  margin-top: 6px;
  border: 1px solid var(--moss);
  border-radius: 2px;
  position: relative;
}

.check-box::after {
  content: "";
  position: absolute;
  left: 3px;
  top: 0px;
  width: 5px;
  height: 9px;
  border-right: 1.5px solid var(--moss);
  border-bottom: 1.5px solid var(--moss);
  transform: rotate(42deg);
}

.check-name {
  font-weight: 600;
  color: var(--ink);
}

.check-criteria {
  color: var(--ink-soft);
}

/* 侧栏 */

.page-aside,
.content-aside,
.observation-aside,
.delivery-aside {
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.aside-sticky,
.aside-inner {
  position: sticky;
  top: 92px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper-warm);
}

.aside-title {
  font-family: var(--sans);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--ink-mute);
  text-transform: uppercase;
  margin: 0;
}

.aside-note {
  font-size: 13px;
  line-height: 1.75;
  color: var(--ink-soft);
  margin: 0;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

.aside-note-title {
  font-family: var(--sans);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--ink);
  margin: 0 0 6px;
}

.aside-link {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  font-size: 13px;
  color: var(--clay);
  text-decoration: underline;
  text-underline-offset: 3px;
}

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

.aside-link-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.aside-link-list a {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  font-size: 13px;
  color: var(--ink-soft);
}

.aside-link-list a:hover {
  color: var(--clay);
}

/* 侧栏目录 */

.toc ul,
.aside-toc ul {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.toc a,
.aside-toc a {
  display: flex;
  align-items: center;
  min-height: 34px;
  padding: 4px 0 4px 10px;
  border-left: 2px solid var(--line);
  font-size: 13px;
  line-height: 1.5;
  color: var(--ink-soft);
  transition: border-color 0.18s ease, color 0.18s ease;
}

.toc a:hover,
.aside-toc a:hover {
  border-left-color: var(--clay);
  color: var(--ink);
}

.toc a.is-active,
.aside-toc a.is-active {
  border-left-color: var(--ink);
  color: var(--ink);
  font-weight: 600;
}

/* 相关链接列 */

.related-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.related-links a {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 0 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-size: 14px;
  color: var(--ink-soft);
  background: var(--paper);
}

.related-links a:hover {
  border-color: var(--ink);
  color: var(--ink);
}


/* ==========================================================================
   pages · 首页
   ========================================================================== */

.home-main {
  display: block;
}

.home-main > section {
  padding: 0 var(--gutter);
  max-width: var(--wrap);
  margin: 0 auto;
}

/* 首屏 */

.hero {
  padding-top: 44px;
  padding-bottom: 40px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  gap: 48px;
  align-items: start;
}

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

.hero-eyebrow {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--ink-mute);
  margin-bottom: 14px;
}

.hero h1 {
  font-size: 38px;
  line-height: 1.3;
  margin-bottom: 16px;
  color: var(--ink);
}

.hero-lead {
  font-size: 16.5px;
  line-height: 1.85;
  color: var(--ink-soft);
  max-width: 34em;
  margin-bottom: 24px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 32px;
}

/* 任务面板 */

.task-panel {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper-warm);
  padding: 18px 20px 8px;
}

.task-panel-title {
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--ink-mute);
  margin-bottom: 10px;
}

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

.task-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 0;
  border-top: 1px solid var(--line);
  font-size: 14px;
  line-height: 1.6;
}

.task-row:first-child {
  border-top: 0;
}

.task-desc {
  flex: 1 1 auto;
  color: var(--ink-soft);
  min-width: 0;
}

.task-link {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 32px;
  font-size: 13.5px;
  color: var(--ink);
  font-weight: 500;
  position: relative;
  padding-right: 16px;
}

.task-link::after {
  content: "→";
  position: absolute;
  right: 0;
  font-family: var(--mono);
  transition: transform 0.18s ease;
}

.task-link:hover {
  color: var(--clay);
}

.task-link:hover::after {
  transform: translateX(3px);
}

/* 首屏标本图 */

.hero-figure {
  margin: 0;
}

.hero-figure .specimen-frame img {
  aspect-ratio: 4 / 5;
}

/* 首页主视觉下方内容图 */

.content-media {
  margin: 0;
}

.content-media-primary {
  margin-top: 40px;
  border-top: 1px solid var(--line);
  padding-top: 24px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 28px;
  align-items: center;
}

.content-media-primary img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.content-media-primary figcaption {
  font-size: 14px;
  line-height: 1.85;
  color: var(--ink-soft);
}

/* 服务分类条 */

.service-strip {
  padding-top: 8px;
  padding-bottom: 56px;
}

.service-rows {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--line);
}

.service-row {
  display: grid;
  grid-template-columns: 64px minmax(0, 1.15fr) minmax(0, 1.15fr) 120px;
  gap: 20px;
  align-items: center;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
  transition: background-color 0.18s ease;
}

.service-row:hover {
  background: var(--paper-warm);
}

.service-mark {
  display: flex;
  align-items: center;
  gap: 10px;
}

.service-swatch {
  display: inline-block;
  width: 12px;
  height: 12px;
  border-radius: 2px;
  flex-shrink: 0;
}

.type-observation .service-swatch { background: var(--moss); }
.type-planning    .service-swatch { background: var(--ochre); }
.type-writing     .service-swatch { background: var(--sky); }
.type-review      .service-swatch { background: var(--clay); }

.service-no {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ink-mute);
  letter-spacing: 0.04em;
}

.service-name-block {
  min-width: 0;
}

.service-name {
  font-size: 18px;
  line-height: 1.4;
  margin-bottom: 4px;
  font-family: var(--serif);
  font-weight: 600;
}

.service-def {
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.service-scene {
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--ink-mute);
  min-width: 0;
}

.service-entry {
  display: inline-flex;
  align-items: center;
  justify-content: flex-end;
  min-height: 40px;
  font-size: 13.5px;
  color: var(--ink);
  font-weight: 500;
  position: relative;
  padding-right: 18px;
}

.service-entry::after {
  content: "→";
  position: absolute;
  right: 0;
  font-family: var(--mono);
  transition: transform 0.18s ease;
}

.service-entry:hover {
  color: var(--clay);
}

.service-entry:hover::after {
  transform: translateX(3px);
}

/* 观察维度 */

.observation {
  padding-top: 8px;
  padding-bottom: 56px;
}

.observation-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 260px;
  gap: 48px;
  align-items: start;
}

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

.observation-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  border-top: 1px solid var(--line);
}

.observation-item {
  padding: 20px 0;
  border-bottom: 1px solid var(--line-soft);
}

.observation-name {
  font-size: 17px;
  line-height: 1.4;
  margin-bottom: 6px;
}

.observation-item p {
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--ink-soft);
}

.observation-aside {
  align-self: start;
  padding: 18px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--clay);
  border-radius: var(--radius);
  background: var(--paper-warm);
}

.observation-aside .aside-note {
  border-top: 0;
  padding-top: 0;
  margin-bottom: 8px;
}

/* 推进四步 */

.flow-overview {
  padding-top: 8px;
  padding-bottom: 56px;
}

.flow-steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.flow-step {
  position: relative;
  padding: 22px 20px 24px;
  border-left: 1px solid var(--line);
  min-width: 0;
}

.flow-step:first-child {
  border-left: 0;
}

.flow-no {
  display: block;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--ink-mute);
  margin-bottom: 10px;
}

.flow-name {
  font-size: 17px;
  line-height: 1.4;
  margin-bottom: 8px;
}

.flow-result {
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.flow-footnote {
  margin-top: 16px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.flow-footnote a {
  color: var(--clay);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* 交付摘要 */

.delivery-summary {
  padding-top: 8px;
  padding-bottom: 56px;
}

.delivery-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 260px;
  gap: 48px;
  align-items: start;
}

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

.delivery-more {
  margin-top: 16px;
  font-size: 14px;
}

.delivery-more a {
  color: var(--clay);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.delivery-aside {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.aside-block {
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper-warm);
}

.aside-block .aside-title {
  font-family: var(--sans);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--ink);
  margin-bottom: 6px;
  text-transform: none;
}

.aside-block p {
  font-size: 13px;
  line-height: 1.75;
  color: var(--ink-soft);
}

/* 高频问题预览 */

.faq-preview {
  padding-top: 8px;
  padding-bottom: 56px;
}

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

/* 站内页面索引 */

.page-index {
  padding-top: 8px;
  padding-bottom: 64px;
}

.index-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0;
  border-top: 1px solid var(--line);
}

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

.index-item:nth-child(2n) {
  border-right: 0;
}

.index-link {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 4px;
  padding: 18px 20px;
  min-height: 88px;
  align-content: center;
  transition: background-color 0.18s ease;
}

.index-link:hover {
  background: var(--paper-warm);
}

.index-name {
  font-family: var(--serif);
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
  line-height: 1.4;
}

.index-link:hover .index-name {
  color: var(--clay);
}

.index-desc {
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--ink-mute);
}


/* ==========================================================================
   pages · 服务范围
   ========================================================================== */

.page-hero {
  padding: 0 0 28px;
  margin-bottom: 8px;
}

.page-hero .eyebrow {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--ink-mute);
  margin-bottom: 12px;
}

.page-hero .page-lead {
  margin-bottom: 16px;
}

.accent-bar {
  display: block;
  width: 48px;
  height: 3px;
  background: var(--moss);
  border-radius: 1px;
}

.scope-overview {
  margin-bottom: 40px;
}

.scope-table {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  font-size: 14px;
}

.scope-table caption {
  caption-side: top;
  text-align: left;
  font-size: 12.5px;
  color: var(--ink-mute);
  padding: 0 0 8px;
}

.scope-table thead th {
  background: var(--paper-warm);
  font-family: var(--sans);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--ink-mute);
  text-align: left;
  padding: 12px 14px;
  border-bottom: 1px solid var(--line);
}

.scope-row td,
.scope-row th {
  padding: 14px;
  border-bottom: 1px solid var(--line-soft);
  text-align: left;
  vertical-align: top;
  font-weight: 400;
  line-height: 1.7;
  color: var(--ink-soft);
}

.scope-row:last-child td,
.scope-row:last-child th {
  border-bottom: 0;
}

.scope-row th {
  font-weight: 600;
  color: var(--ink);
  white-space: nowrap;
}

.scope-row td a {
  color: var(--clay);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.scope-code {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--ink-mute);
  white-space: nowrap;
}

.scope-row-observe { border-left: 3px solid var(--moss); }
.scope-row-plan    { border-left: 3px solid var(--ochre); }
.scope-row-draft   { border-left: 3px solid var(--sky); }
.scope-row-review  { border-left: 3px solid var(--clay); }

/* 服务章节 */

.service-chapter {
  padding: 28px 0;
  border-top: 1px solid var(--line);
}

.service-chapter:first-of-type {
  border-top: 0;
}

.chapter-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.chapter-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--ink-mute);
}

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

.definition-block {
  min-width: 0;
}

.definition-line {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.75;
  color: var(--ink);
  padding-left: 14px;
  border-left: 3px solid var(--line);
  margin-bottom: 14px;
}

#service-observe .definition-line { border-left-color: var(--moss); }
#service-plan    .definition-line { border-left-color: var(--ochre); }
#service-draft   .definition-line { border-left-color: var(--sky); }
#service-review  .definition-line { border-left-color: var(--clay); }

.definition-block > p {
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--ink-soft);
  margin-bottom: 16px;
}

.example-block {
  padding: 14px 16px;
  background: var(--paper-warm);
  border-radius: var(--radius);
  margin-bottom: 16px;
}

.example-block h3 {
  font-family: var(--sans);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--ink);
  margin-bottom: 6px;
}

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

.term-group h3 {
  font-family: var(--sans);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--ink-mute);
  margin-bottom: 8px;
}

.term-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.term-list li {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 2px 12px;
  border: 1px solid var(--line);
  border-radius: 2px;
  font-size: 13px;
  color: var(--ink-soft);
  background: var(--paper);
}

/* 不适配情形 */

.not-fit {
  margin-top: 12px;
  padding-top: 28px;
  border-top: 1px solid var(--line);
}

.not-fit-list {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--line-soft);
}

.not-fit-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line-soft);
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.not-fit-mark {
  flex-shrink: 0;
  width: 14px;
  height: 14px;
  margin-top: 7px;
  border: 1px solid var(--clay);
  border-radius: 2px;
  position: relative;
}

.not-fit-mark::before,
.not-fit-mark::after {
  content: "";
  position: absolute;
  left: 2px;
  top: 5.5px;
  width: 8px;
  height: 1.5px;
  background: var(--clay);
}

.not-fit-mark::before { transform: rotate(45deg); }
.not-fit-mark::after  { transform: rotate(-45deg); }

.not-fit-text {
  flex: 1 1 auto;
  min-width: 0;
}

.not-fit-more {
  margin-top: 18px;
  font-size: 14px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
}

.not-fit-more a {
  color: var(--clay);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.link-arrow::after {
  content: " →";
  font-family: var(--mono);
}


/* ==========================================================================
   pages · 工作方法
   ========================================================================== */

.page-title-area {
  padding: 0 0 24px;
  margin-bottom: 8px;
}

.page-accent-bar {
  display: block;
  width: 48px;
  height: 3px;
  background: var(--ochre);
  border-radius: 1px;
  margin-bottom: 16px;
}

.content-flow {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  max-width: 820px;
}

.method-overview {
  margin-bottom: 36px;
}

.overview-steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.overview-step {
  padding: 18px 16px 20px;
  border-left: 1px solid var(--line);
  min-width: 0;
}

.overview-step:first-child {
  border-left: 0;
}

.step-index {
  display: block;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--ink-mute);
  margin-bottom: 8px;
}

.step-name {
  font-size: 16px;
  line-height: 1.4;
  margin-bottom: 6px;
}

.step-output {
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.method-detail {
  margin-bottom: 36px;
}

.method-block {
  position: relative;
  padding: 0 0 26px 22px;
  border-left: 1px solid var(--line);
  margin-bottom: 4px;
}

.method-block:last-child {
  border-left-color: transparent;
  padding-bottom: 0;
}

.method-block::before {
  content: "";
  position: absolute;
  left: -4px;
  top: 8px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--ochre);
}

.method-block-title {
  font-size: 19px;
  line-height: 1.4;
  margin-bottom: 14px;
}

.triple-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
}

.triple-item {
  display: grid;
  grid-template-columns: 84px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 10px 14px;
  background: var(--paper-warm);
  border-radius: var(--radius);
  min-width: 0;
}

.triple-label {
  font-family: var(--sans);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--ink-mute);
  line-height: 1.9;
}

.triple-text {
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
  min-width: 0;
}

.materials-checklist {
  margin-bottom: 36px;
}

.checklist-item {
  display: grid;
  grid-template-columns: 22px minmax(120px, 0.7fr) minmax(0, 1.6fr);
  gap: 14px;
  align-items: start;
  padding: 13px 0;
  border-bottom: 1px solid var(--line-soft);
  font-size: 14px;
  line-height: 1.75;
}

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

.checklist-mark {
  display: inline-block;
  width: 14px;
  height: 14px;
  margin-top: 6px;
  border: 1px solid var(--moss);
  border-radius: 2px;
  position: relative;
}

.checklist-mark::after {
  content: "";
  position: absolute;
  left: 3px;
  top: 0;
  width: 5px;
  height: 9px;
  border-right: 1.5px solid var(--moss);
  border-bottom: 1.5px solid var(--moss);
  transform: rotate(42deg);
}

.checklist-name {
  font-weight: 600;
  color: var(--ink);
}

.checklist-use {
  color: var(--ink-soft);
}

.method-related {
  padding-top: 24px;
  border-top: 1px solid var(--line);
}


/* ==========================================================================
   pages · 交付标准
   ========================================================================== */

.page-head {
  padding: 0 0 20px;
}

.page-kicker {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--ink-mute);
  margin-bottom: 10px;
}

.page-accent {
  display: block;
  width: 48px;
  height: 3px;
  background: var(--sky);
  border-radius: 1px;
  margin-top: 14px;
}

.delivery-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 260px;
  gap: 48px;
  align-items: start;
}

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

.content-block {
  padding-top: 26px;
  border-top: 1px solid var(--line);
  margin-top: 26px;
}

.content-block:first-of-type {
  border-top: 0;
  margin-top: 0;
  padding-top: 0;
}

.block-title {
  font-size: 21px;
  line-height: 1.4;
  margin-bottom: 10px;
}

.block-intro {
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--ink-soft);
  margin-bottom: 18px;
  max-width: 46em;
}

.checklist-row {
  display: grid;
  grid-template-columns: 22px minmax(110px, 0.75fr) minmax(110px, 0.9fr) minmax(0, 1.5fr);
  gap: 14px;
  align-items: start;
  padding: 13px 0;
  border-bottom: 1px solid var(--line-soft);
  font-size: 14px;
  line-height: 1.75;
}

.checklist-form {
  color: var(--ink-mute);
}

.checklist-rule {
  color: var(--ink-soft);
}

.criteria-list {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--line-soft);
}

.criteria-item {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 14px 0;
  border-bottom: 1px solid var(--line-soft);
}

.criteria-no {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--ink-mute);
  padding-top: 2px;
}

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

.criteria-rule {
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink);
  font-weight: 500;
  margin-bottom: 4px;
}

.criteria-fail {
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--ink-mute);
}

.boundary-list {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--line-soft);
}

.boundary-row {
  display: grid;
  grid-template-columns: 76px minmax(0, 1fr) 76px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  padding: 14px 0;
  border-bottom: 1px solid var(--line-soft);
  font-size: 13.5px;
  line-height: 1.75;
}

.boundary-tag {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 2px 8px;
  border-radius: 2px;
  font-size: 11.5px;
  letter-spacing: 0.04em;
  background: rgba(79, 122, 74, 0.12);
  color: var(--moss);
  white-space: nowrap;
}

.boundary-tag-alt {
  background: rgba(169, 113, 63, 0.12);
  color: var(--ochre);
}

.boundary-text {
  color: var(--ink-soft);
  min-width: 0;
}

.rework-list {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--line-soft);
}

.rework-row {
  display: grid;
  grid-template-columns: minmax(120px, 0.6fr) minmax(0, 1.6fr);
  gap: 16px;
  align-items: start;
  padding: 14px 0;
  border-bottom: 1px solid var(--line-soft);
}

.rework-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
  line-height: 1.7;
}

.rework-text {
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.content-aside {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.content-aside .specimen-frame img {
  aspect-ratio: 4 / 5;
}

.aside-note {
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper-warm);
}

.aside-note-title {
  font-family: var(--sans);
  font-size: 13px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 6px;
}

.aside-note p {
  font-size: 13px;
  line-height: 1.75;
  color: var(--ink-soft);
  margin-bottom: 6px;
}

.aside-note p:last-child {
  margin-bottom: 0;
}


/* ==========================================================================
   pages · 合作流程
   ========================================================================== */

.page-layout-single {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  max-width: 820px;
}

.page-hero-inner {
  min-width: 0;
}

.timeline-section {
  margin-bottom: 32px;
}

.timeline {
  position: relative;
  display: flex;
  flex-direction: column;
  padding-left: 26px;
  border-left: 1px solid var(--line);
}

.timeline-item {
  position: relative;
  padding: 0 0 28px 0;
}

.timeline-item:last-child {
  padding-bottom: 0;
}

.timeline-dot {
  position: absolute;
  left: -33px;
  top: 8px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--paper);
  border: 2px solid var(--clay);
}

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

.timeline-index {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--ink-mute);
  margin-bottom: 6px;
}

.timeline-title {
  font-size: 19px;
  line-height: 1.4;
  margin-bottom: 12px;
}

.timeline-block {
  padding: 12px 16px;
  background: var(--paper-warm);
  border-radius: var(--radius);
  margin-bottom: 10px;
}

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

.timeline-label {
  display: block;
  font-family: var(--sans);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--ink-mute);
  margin-bottom: 4px;
}

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

.timeline-end {
  margin-top: 20px;
  padding-left: 26px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-mute);
}

.dependency-section {
  margin-top: 32px;
  padding-top: 28px;
  border-top: 1px solid var(--line);
}

.dependency-list {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--line-soft);
}

.dependency-row {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.6fr);
  gap: 18px;
  align-items: start;
  padding: 14px 0;
  border-bottom: 1px solid var(--line-soft);
}

.dependency-head {
  font-size: 14px;
  font-weight: 600;
  line-height: 1.7;
  color: var(--ink);
}

.dependency-desc {
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.related-section {
  margin-top: 32px;
  padding-top: 28px;
  border-top: 1px solid var(--line);
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.related-item a {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
  min-height: 84px;
  transition: border-color 0.18s ease, background-color 0.18s ease;
}

.related-item a:hover {
  border-color: var(--ink);
  background: var(--paper-warm);
}

.related-name {
  font-family: var(--serif);
  font-size: 15.5px;
  font-weight: 600;
  color: var(--ink);
  line-height: 1.4;
}

.related-desc {
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-mute);
}


/* ==========================================================================
   pages · 常见问题
   ========================================================================== */

.page-primary {
  min-width: 0;
}

.faq-index {
  margin-bottom: 32px;
}

.faq-index-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0;
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

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

.faq-index-item a {
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr) auto;
  gap: 10px;
  align-items: center;
  padding: 14px 16px;
  min-height: 56px;
  transition: background-color 0.18s ease;
}

.faq-index-item a:hover {
  background: var(--paper-warm);
}

.faq-index-num {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ink-mute);
}

.faq-index-name {
  font-size: 14.5px;
  font-weight: 500;
  color: var(--ink);
  line-height: 1.5;
}

.faq-index-count {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ink-mute);
}

.faq-group {
  margin-bottom: 36px;
  scroll-margin-top: 92px;
}

.faq-group-head {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 8px;
}

.faq-group-tag {
  display: inline-flex;
  align-items: center;
  padding: 1px 8px;
  border-radius: 2px;
  font-size: 11.5px;
  letter-spacing: 0.06em;
  line-height: 1.8;
}

.tag-moss  { background: rgba(79, 122, 74, 0.12);  color: var(--moss); }
.tag-ochre { background: rgba(169, 113, 63, 0.12); color: var(--ochre); }
.tag-sky   { background: rgba(63, 111, 134, 0.12); color: var(--sky); }
.tag-clay  { background: rgba(179, 84, 63, 0.12);  color: var(--clay); }

.faq-group-head h2 {
  font-size: 20px;
  line-height: 1.4;
}

.faq-group-desc {
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--ink-mute);
  margin-bottom: 14px;
}

.faq-group-desc a {
  color: var(--clay);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.faq-q {
  flex: 1 1 auto;
  font-weight: 500;
  min-width: 0;
}

.faq-a {
  padding: 14px 18px 18px;
  border-top: 1px solid var(--line-soft);
  font-size: 14px;
  line-height: 1.85;
  color: var(--ink-soft);
}

.faq-a p + p {
  margin-top: 10px;
}

.faq-a a {
  color: var(--clay);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.faq-outro {
  margin-top: 8px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper-warm);
}

.faq-outro .section-title {
  font-size: 18px;
  margin-bottom: 8px;
}

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

.faq-outro a {
  color: var(--clay);
  text-decoration: underline;
  text-underline-offset: 3px;
}


/* ==========================================================================
   pages · 关于
   ========================================================================== */

.page-hero--about {
  padding-bottom: 24px;
}

.layout-single {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  max-width: 820px;
}

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

.about-section {
  margin-bottom: 36px;
  scroll-margin-top: 92px;
}

.about-section h2 {
  font-size: 22px;
  line-height: 1.4;
  margin-bottom: 12px;
}

.about-section > p {
  font-size: 15px;
  line-height: 1.9;
  color: var(--ink-soft);
  margin-bottom: 14px;
}

.about-section > p:last-of-type {
  margin-bottom: 0;
}

.about-subnote {
  font-size: 13px;
  line-height: 1.75;
  color: var(--ink-mute);
  margin-bottom: 16px;
}

.do-dont {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-bottom: 16px;
}

.do-panel,
.dont-panel {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
}

.do-panel {
  border-top: 3px solid var(--moss);
}

.dont-panel {
  border-top: 3px solid var(--clay);
}

.do-panel-title,
.dont-panel-title {
  font-family: var(--sans);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--ink);
  margin-bottom: 10px;
}

.do-list,
.dont-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.do-list li,
.dont-list li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.do-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--moss);
}

.dont-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--clay);
}

.statement-list {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--line);
}

.statement-item {
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr);
  gap: 16px;
  align-items: start;
  padding: 14px 0;
  border-bottom: 1px solid var(--line-soft);
}

.statement-label {
  font-family: var(--sans);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--ink-mute);
  line-height: 1.9;
}

.statement-item p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
  min-width: 0;
}

.about-linkline {
  margin-top: 16px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  font-size: 14px;
}

.about-linkline a {
  color: var(--clay);
  text-decoration: underline;
  text-underline-offset: 3px;
}


/* ==========================================================================
   pages · 404
   ========================================================================== */

.error-main {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 64px var(--gutter) 80px;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 40px;
}

.error-panel {
  max-width: 40em;
}

.error-code {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--ink-mute);
  margin-bottom: 14px;
}

.error-panel h1 {
  font-size: 32px;
  line-height: 1.35;
  margin-bottom: 14px;
}

.error-lead {
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink-soft);
  margin-bottom: 10px;
}

.error-tip {
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-mute);
  margin-bottom: 24px;
}

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

.error-guide {
  padding-top: 28px;
  border-top: 1px solid var(--line);
  max-width: 46em;
}

.error-guide h2 {
  font-size: 19px;
  line-height: 1.4;
  margin-bottom: 14px;
}

.error-link-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0;
  border-top: 1px solid var(--line-soft);
}

.error-link-list li {
  border-bottom: 1px solid var(--line-soft);
}

.error-link-list a {
  display: flex;
  align-items: center;
  min-height: 48px;
  padding: 8px 4px;
  font-size: 14.5px;
  color: var(--ink-soft);
}

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


/* ==========================================================================
   responsive
   ========================================================================== */

@media (max-width: 1024px) {
  .header-inner {
    min-height: 60px;
    gap: 16px;
  }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--paper);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 8px 20px rgba(31, 42, 36, 0.06);
    padding: 8px var(--gutter) 16px;
    flex-direction: column;
    align-items: stretch;
    display: flex;
    justify-content: flex-start;
  }

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

  .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    width: 100%;
  }

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

  .nav-list > li {
    width: 100%;
  }

  .nav-list a {
    width: 100%;
    min-height: 44px;
    padding: 0 4px;
    border-bottom: 1px solid var(--line-soft);
    font-size: 15px;
  }

  .nav-list a::after {
    display: none;
  }

  .nav-list a.is-current {
    color: var(--clay);
  }

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

  .hero-figure {
    order: 0;
  }

  .hero-figure .specimen-frame img {
    aspect-ratio: 16 / 10;
  }

  .hero h1 {
    font-size: 30px;
  }

  .content-media-primary {
    grid-template-columns: minmax(0, 1fr);
    gap: 14px;
  }

  .service-row {
    grid-template-columns: 56px minmax(0, 1fr) minmax(0, 1fr);
    gap: 14px 18px;
    align-items: start;
  }

  .service-entry {
    grid-column: 2 / -1;
    justify-content: flex-start;
    min-height: 36px;
  }

  .observation-layout,
  .delivery-layout {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
  }

  .observation-aside,
  .delivery-aside {
    order: 2;
  }

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

  .flow-step {
    border-left: 1px solid var(--line);
    border-top: 1px solid var(--line);
  }

  .flow-step:nth-child(1),
  .flow-step:nth-child(2) {
    border-top: 0;
  }

  .flow-step:nth-child(odd) {
    border-left: 0;
  }

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

  .index-item {
    border-right: 0;
  }

  .page-layout,
  .page-layout.layout-main-aside,
  .delivery-layout {
    grid-template-columns: minmax(0, 1fr);
    gap: 28px;
  }

  .aside-sticky,
  .aside-inner {
    position: static;
  }

  .page-aside {
    order: 2;
  }

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

  .overview-step {
    border-left: 1px solid var(--line);
    border-top: 1px solid var(--line);
  }

  .overview-step:nth-child(1),
  .overview-step:nth-child(2) {
    border-top: 0;
  }

  .overview-step:nth-child(odd) {
    border-left: 0;
  }

  .content-flow,
  .page-layout-single,
  .layout-single {
    max-width: 100%;
  }

  .checklist-row {
    grid-template-columns: 22px minmax(0, 1fr) minmax(0, 1.6fr);
  }

  .checklist-form {
    display: none;
  }

  .boundary-row {
    grid-template-columns: 76px minmax(0, 1fr);
  }

  .boundary-row .boundary-tag-alt {
    grid-column: 1;
  }

  .boundary-row .boundary-text:last-child {
    grid-column: 2;
  }

  .footer-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 32px;
    padding-top: 40px;
  }

  .error-link-list {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 720px) {
  :root {
    --gutter: 18px;
  }

  body.site-body {
    font-size: 15px;
    line-height: 1.8;
  }

  .brand-name {
    font-size: 19px;
  }

  .brand-tagline {
    font-size: 11.5px;
  }

  .hero {
    padding-top: 28px;
    padding-bottom: 32px;
  }

  .hero h1 {
    font-size: 26px;
    line-height: 1.35;
  }

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

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

  .task-panel {
    padding: 16px 16px 6px;
  }

  .task-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    padding: 12px 0;
  }

  .task-link {
    min-height: 28px;
  }

  .service-row {
    grid-template-columns: 44px minmax(0, 1fr);
    gap: 8px 14px;
  }

  .service-scene {
    grid-column: 2;
  }

  .service-entry {
    grid-column: 2;
  }

  .service-name {
    font-size: 17px;
  }

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

  .flow-step {
    border-left: 0;
    border-top: 1px solid var(--line);
    padding: 16px 0;
  }

  .flow-step:first-child {
    border-top: 0;
  }

  .check-row {
    grid-template-columns: 22px minmax(0, 1fr);
    gap: 6px 12px;
  }

  .check-criteria {
    grid-column: 2;
  }

  .page-title {
    font-size: 26px;
  }

  .page-header {
    padding: 12px 0 16px;
    margin-bottom: 24px;
  }

  .section-title {
    font-size: 20px;
  }

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

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

  .scope-table thead {
    display: none;
  }

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

  .scope-table {
    border-radius: var(--radius);
  }

  .scope-row {
    padding: 12px 0;
    border-bottom: 1px solid var(--line);
    border-left-width: 3px;
    border-left-style: solid;
  }

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

  .scope-row td,
  .scope-row th {
    border-bottom: 0;
    padding: 2px 14px;
  }

  .scope-row th {
    white-space: normal;
  }

  .scope-code {
    font-size: 11.5px;
    color: var(--ink-mute);
  }

  .scope-row-observe { border-left-color: var(--moss); }
  .scope-row-plan    { border-left-color: var(--ochre); }
  .scope-row-draft   { border-left-color: var(--sky); }
  .scope-row-review  { border-left-color: var(--clay); }

  .triple-item {
    grid-template-columns: minmax(0, 1fr);
    gap: 4px;
  }

  .triple-label {
    line-height: 1.6;
  }

  .checklist-item {
    grid-template-columns: 22px minmax(0, 1fr);
    gap: 4px 12px;
  }

  .checklist-use {
    grid-column: 2;
  }

  .checklist-row {
    grid-template-columns: 22px minmax(0, 1fr);
    gap: 4px 12px;
  }

  .checklist-form,
  .checklist-rule {
    grid-column: 2;
  }

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

  .boundary-row .boundary-tag-alt,
  .boundary-row .boundary-text:last-child {
    grid-column: 1;
  }

  .rework-row {
    grid-template-columns: minmax(0, 1fr);
    gap: 4px;
  }

  .dependency-row {
    grid-template-columns: minmax(0, 1fr);
    gap: 4px;
  }

  .criteria-item {
    grid-template-columns: 32px minmax(0, 1fr);
    gap: 10px;
  }

  .faq-index-list {
    grid-template-columns: minmax(0, 1fr);
  }

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

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

  .statement-item {
    grid-template-columns: minmax(0, 1fr);
    gap: 4px;
  }

  .footer-nav {
    gap: 24px;
  }

  .footer-inner {
    padding: 32px var(--gutter) 24px;
  }

  .error-main {
    padding: 40px var(--gutter) 56px;
  }

  .error-panel h1 {
    font-size: 26px;
  }

  .faq-summary {
    padding: 14px 14px 14px;
    padding-right: 40px;
    font-size: 14.5px;
  }

  .faq-summary::after {
    right: 14px;
  }

  .faq-a,
  .faq-answer {
    padding-left: 14px;
    padding-right: 14px;
  }

  .timeline {
    padding-left: 20px;
  }

  .timeline-dot {
    left: -27px;
    width: 12px;
    height: 12px;
  }

  .timeline-end {
    padding-left: 20px;
  }

  .timeline-title {
    font-size: 17px;
  }

  .timeline-block {
    padding: 10px 12px;
  }

  .related-links {
    gap: 8px;
  }

  .related-links a {
    min-height: 40px;
    font-size: 13.5px;
  }

  .aside-sticky,
  .aside-inner {
    padding: 16px;
  }

  .aside-note {
    padding: 14px;
  }
}

@media (max-width: 390px) {
  .brand-tagline {
    display: none;
  }

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

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

  .hero-actions .btn {
    min-width: 0;
    flex: 1 1 100%;
  }

  .task-link {
    font-size: 13px;
  }

  .service-row {
    grid-template-columns: 36px minmax(0, 1fr);
  }

  .index-link {
    padding: 16px;
  }

  .faq-index-item a {
    grid-template-columns: 26px minmax(0, 1fr) auto;
    padding: 12px 12px;
  }
}

@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;
  }
}