/* ==========================================================================
   美天旎官网 · 站点样式
   分组：base / layout / components / pages / responsive
   ========================================================================== */

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

:root {
  --paper: #f6f4ee;
  --paper-card: #fffdf8;
  --ink: #1c1c1a;
  --ink-soft: #57544c;
  --ink-deep: #24404f;
  --accent: #9a4a32;
  --rule: #d9d3c6;
  --tint: #ece7db;
  --mark: #6f8b7a;

  --serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", serif;
  --mono: "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;

  --wrap: 1100px;
  --body-col: 720px;
  --aside-col: 340px;
  --col-gap: 40px;
  --header-h: 76px;
}

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

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

body {
  margin: 0;
  background-color: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 16px;
  line-height: 1.9;
  font-weight: 400;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  margin: 0;
  font-weight: 700;
  line-height: 1.4;
  color: var(--ink);
}

p {
  margin: 0 0 1em;
}

p:last-child {
  margin-bottom: 0;
}

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

a {
  color: var(--ink-deep);
  text-decoration: none;
  text-underline-offset: 3px;
}

a:hover {
  text-decoration: underline;
  text-decoration-color: var(--accent);
  text-decoration-thickness: 1px;
}

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

figure {
  margin: 0;
}

button {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
  background: none;
  border: 0;
  padding: 0;
  cursor: pointer;
}

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

sup {
  line-height: 0;
}

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

/* ==========================================================================
   layout
   ========================================================================== */

.site-body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  background-color: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
}

.site-header {
  position: relative;
  z-index: 30;
  background-color: var(--paper);
  border-bottom: 1px solid var(--rule);
}

.header-inner {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 24px;
  min-height: var(--header-h);
  display: flex;
  align-items: center;
  gap: 28px;
}

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

.brand-mark {
  font-family: var(--serif);
  font-size: 21px;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: 0.02em;
  color: var(--ink-deep);
}

.brand-sub {
  font-family: var(--mono);
  font-size: 11px;
  line-height: 1.3;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
  text-transform: uppercase;
}

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

.nav-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px 22px;
}

.nav-list li {
  display: flex;
}

.nav-list a {
  display: inline-block;
  padding: 6px 0;
  font-size: 15px;
  line-height: 1.5;
  color: var(--ink-deep);
  border-bottom: 2px solid transparent;
}

.nav-list a:hover {
  text-decoration: none;
  border-bottom-color: var(--accent);
}

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

.nav-cta {
  flex-shrink: 0;
  display: inline-block;
  padding: 8px 16px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--ink-deep);
  border: 1px solid var(--ink-deep);
  border-radius: 4px;
  line-height: 1.4;
}

.nav-cta:hover {
  background-color: var(--ink-deep);
  color: var(--paper-card);
  text-decoration: none;
}

.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  border: 1px solid var(--rule);
  border-radius: 4px;
}

.menu-bar {
  display: block;
  width: 20px;
  height: 2px;
  background-color: var(--ink-deep);
}

.mobile-nav {
  border-top: 1px solid var(--rule);
  background-color: var(--paper-card);
}

.mobile-nav[hidden] {
  display: none;
}

.mobile-nav-list {
  padding: 8px 24px 16px;
}

.mobile-nav-list li {
  border-bottom: 1px solid var(--rule);
}

.mobile-nav-list li:last-child {
  border-bottom: 0;
}

.mobile-nav-list a {
  display: flex;
  align-items: center;
  min-height: 48px;
  font-size: 16px;
  color: var(--ink-deep);
}

.mobile-nav-list a.is-current {
  color: var(--accent);
  font-weight: 700;
}

.site-main {
  flex: 1 1 auto;
  width: 100%;
}

.home-main {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 24px 72px;
}

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

.site-footer {
  background-color: var(--tint);
  border-top: 1px solid var(--rule);
  color: var(--ink);
}

/* ==========================================================================
   components
   ========================================================================== */

/* —— 通用文字元素 —— */

.eyebrow {
  margin: 0 0 10px;
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.5;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
}

.text-link {
  display: inline-block;
  color: var(--ink-deep);
  font-size: 15px;
  border-bottom: 1px solid var(--accent);
  padding-bottom: 1px;
}

.text-link::after {
  content: " →";
  color: var(--accent);
}

.text-link:hover {
  text-decoration: none;
  color: var(--accent);
}

.section-lead,
.section-desc,
.section-sub,
.section-intro {
  margin: 8px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-soft);
  max-width: 68ch;
}

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

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

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

.section-tail {
  margin-top: 20px;
  text-align: right;
}

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

.section-footnote {
  margin-top: 18px;
  font-size: 14px;
  color: var(--ink-soft);
}

/* —— 按钮 —— */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 22px;
  font-family: var(--serif);
  font-size: 15px;
  line-height: 1.4;
  border-radius: 4px;
  border: 1px solid var(--ink-deep);
  transition: background-color 0.15s ease, color 0.15s ease;
}

.btn:hover {
  text-decoration: none;
}

.btn-primary {
  background-color: var(--ink-deep);
  color: var(--paper-card);
}

.btn-primary:hover {
  background-color: #1a303c;
  color: var(--paper-card);
}

.btn-secondary {
  background-color: transparent;
  color: var(--ink-deep);
}

.btn-secondary:hover {
  background-color: var(--ink-deep);
  color: var(--paper-card);
}

/* —— 摘要框 —— */

.abstract-box {
  margin: 18px 0 0;
  padding: 18px 20px;
  background-color: var(--paper-card);
  border-left: 3px solid var(--ink-deep);
  border-radius: 4px;
}

.abstract-box > p {
  margin: 0 0 10px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink);
}

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

.abstract-note {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--ink-soft);
}

.abstract {
  margin: 16px 0 0;
  padding: 18px 20px;
  background-color: var(--paper-card);
  border-left: 3px solid var(--ink-deep);
  border-radius: 4px;
}

.abstract-lead {
  margin: 0 0 10px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink);
}

.abstract-text {
  margin: 0 0 10px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink);
}

.abstract-points {
  margin: 0;
  padding-left: 0;
}

.abstract-points li {
  position: relative;
  padding-left: 18px;
  margin-bottom: 6px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.abstract-points li:last-child {
  margin-bottom: 0;
}

.abstract-points li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 0.85em;
  width: 6px;
  height: 1px;
  background-color: var(--accent);
}

/* —— 面包屑 —— */

.breadcrumb {
  padding: 20px 0 0;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--ink-soft);
}

.breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
}

.breadcrumb-list li {
  display: flex;
  align-items: center;
  gap: 6px;
}

.breadcrumb-list li + li::before {
  content: "/";
  color: var(--rule);
}

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

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

.breadcrumb-sep {
  color: var(--rule);
  margin: 0 2px;
}

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

/* —— 页面标题区 —— */

.page-header {
  padding: 14px 0 0;
}

.page-title {
  font-size: 34px;
  line-height: 1.35;
  font-weight: 700;
  color: var(--ink);
  margin: 0;
}

.page-head {
  padding: 22px 0 0;
}

.page-head .abstract-box {
  margin-top: 14px;
}

/* —— 图片与图注 —— */

.figure-caption {
  margin-top: 8px;
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.02em;
  color: var(--ink-soft);
}

.content-media,
.content-figure,
.stage-figure,
.summary-figure,
.note-media,
.note-figure,
.hero-col-figure,
.boundary-figure,
.sidebar-figure,
.page-figure {
  overflow: hidden;
  border-radius: 6px;
}

.content-media img,
.content-figure img,
.stage-figure img,
.summary-figure img,
.note-media img,
.note-figure img,
.hero-col-figure img,
.boundary-figure img,
.sidebar-figure img,
.page-figure img {
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: 6px;
  background-color: var(--tint);
}

/* —— 表格通用 —— */

.table-caption {
  caption-side: top;
  text-align: left;
  padding-bottom: 10px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--ink-soft);
}

.entry-table,
.entry-index-table,
.data-table,
.scene-table {
  font-size: 15px;
  line-height: 1.7;
}

.entry-table th,
.entry-index-table th,
.data-table th,
.scene-table th {
  padding: 10px 12px;
  text-align: left;
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--paper-card);
  background-color: var(--ink-deep);
  border-bottom: 1px solid var(--ink-deep);
}

.entry-table td,
.entry-index-table td,
.data-table td,
.scene-table td {
  padding: 12px;
  border-bottom: 1px solid var(--rule);
  vertical-align: top;
  color: var(--ink);
}

.entry-table tbody tr:hover,
.entry-index-table tbody tr:hover,
.data-table tbody tr:hover,
.scene-table tbody tr:hover {
  background-color: var(--paper-card);
}

.cell-no {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--accent);
  white-space: nowrap;
}

/* —— 核对清单 —— */

.check-list {
  margin: 0;
}

.check-list li {
  position: relative;
  padding-left: 22px;
  margin-bottom: 8px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink);
}

.check-list li:last-child {
  margin-bottom: 0;
}

.check-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 0;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--mark);
}

.check-list-exclude li::before {
  content: "×";
  color: var(--accent);
}

.checklist {
  margin: 0;
  display: grid;
  gap: 0;
}

.checklist-item {
  display: flex;
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid var(--rule);
}

.checklist-item:first-child {
  padding-top: 0;
}

.checklist-num {
  flex-shrink: 0;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--accent);
  padding-top: 4px;
  min-width: 26px;
}

.checklist-body {
  flex: 1 1 auto;
  min-width: 0;
}

.checklist-title {
  font-size: 16px;
  line-height: 1.6;
  margin: 0 0 4px;
}

.checklist-meta {
  margin: 0 0 4px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--ink-soft);
}

.checklist-text {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.checklist-rule {
  margin: 4px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink);
}

.checklist-example {
  margin: 4px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-soft);
}

/* —— 折叠问答 —— */

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

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

.faq-question {
  margin: 0;
  font-size: 16px;
  line-height: 1.6;
}

.faq-toggle {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
  min-height: 56px;
  padding: 14px 0;
  text-align: left;
  font-family: var(--serif);
  font-size: 16px;
  font-weight: 700;
  line-height: 1.6;
  color: var(--ink);
}

.faq-toggle::after {
  content: "+";
  flex-shrink: 0;
  font-family: var(--mono);
  font-size: 18px;
  font-weight: 400;
  color: var(--accent);
  line-height: 1.4;
}

.faq-toggle[aria-expanded="true"]::after {
  content: "−";
}

.faq-answer {
  padding: 0 0 16px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-soft);
  overflow: hidden;
}

.faq-answer[hidden] {
  display: none;
}

.faq-answer p {
  margin: 0 0 8px;
}

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

.faq-more {
  margin-top: 8px;
  font-size: 14px;
}

/* —— 编号 / 标签 —— */

.chip {
  display: inline-block;
  margin: 2px 6px 2px 0;
  padding: 2px 10px;
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.04em;
  color: var(--ink-deep);
  background-color: var(--tint);
  border-radius: 4px;
}

.chip-muted {
  color: var(--ink-soft);
  background-color: transparent;
  border: 1px solid var(--rule);
}

/* —— 脚注 —— */

.fn-ref {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--accent);
  padding-left: 2px;
}

.fn-mark {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--accent);
  padding-left: 2px;
}

.footnote-ref {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--accent);
  padding-left: 2px;
}

.footnotes {
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid var(--rule);
}

.footnotes-title {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin: 0 0 12px;
}

.footnote-list {
  counter-reset: fn;
}

.footnote-list li {
  counter-increment: fn;
  position: relative;
  padding-left: 26px;
  margin-bottom: 8px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.footnote-list li::before {
  content: counter(fn) ".";
  position: absolute;
  left: 0;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--accent);
}

.fn-back,
.footnote-back {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--accent);
  margin-left: 6px;
}

.footnote {
  margin-top: 12px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.footnote-num {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--accent);
  margin-right: 4px;
}

.head-footnote {
  margin-top: 14px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.table-footnote {
  margin-top: 12px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-soft);
}

/* —— 相关链接 —— */

.related-links {
  margin-top: 32px;
  padding-top: 18px;
  border-top: 1px solid var(--rule);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 20px;
}

.related-links-label {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.related-links-item {
  font-size: 15px;
  color: var(--ink-deep);
  border-bottom: 1px solid var(--accent);
}

.related-links-item:hover {
  text-decoration: none;
  color: var(--accent);
}

.related-list,
.link-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
}

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

.related-list a:hover,
.link-list a:hover {
  text-decoration: none;
  color: var(--accent);
}

/* —— 跳过链接 —— */

.skip-link {
  position: absolute;
  top: -100px;
  left: 12px;
  z-index: 100;
  padding: 10px 18px;
  background-color: var(--ink-deep);
  color: var(--paper-card);
  font-size: 14px;
  border-radius: 0 0 4px 4px;
}

.skip-link:focus {
  top: 0;
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* —— 页脚 —— */

.footer-related {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 24px 24px 20px;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 28px;
  border-bottom: 1px solid var(--rule);
}

.footer-related-label {
  margin: 0;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.footer-related-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
}

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

.footer-related-list a:hover {
  text-decoration: none;
  color: var(--accent);
}

.footer-grid {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 32px 24px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr)) minmax(0, 1.3fr);
  gap: 32px 40px;
}

.footer-title {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-deep);
  margin: 0 0 12px;
}

.footer-list li {
  margin-bottom: 6px;
}

.footer-list a {
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
}

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

.footer-note {
  margin: 0 0 8px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.footer-col-note .text-link {
  margin-top: 6px;
  font-size: 14px;
}

.footer-bottom {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 18px 24px 28px;
  border-top: 1px solid var(--rule);
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 20px;
}

.footer-brand {
  margin: 0;
  font-family: var(--serif);
  font-size: 15px;
  font-weight: 700;
  color: var(--ink-deep);
}

.footer-desc {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-soft);
}

/* ==========================================================================
   pages
   ========================================================================== */

/* —— 首页 —— */

.hero-index {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 0.85fr);
  gap: 48px;
  align-items: start;
  padding: 40px 0 56px;
  border-bottom: 1px solid var(--rule);
}

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

.hero-col-text h1 {
  font-size: 34px;
  line-height: 1.35;
  margin: 0;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 22px;
}

.question-index {
  margin-top: 30px;
  padding-top: 20px;
  border-top: 1px solid var(--rule);
}

.question-index-title {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin: 0 0 12px;
}

.question-list {
  display: grid;
  gap: 6px;
}

.question-list li {
  min-width: 0;
}

.question-list a {
  display: block;
  padding: 10px 14px;
  font-size: 15px;
  line-height: 1.6;
  color: var(--ink);
  background-color: var(--paper-card);
  border: 1px solid var(--rule);
  border-radius: 4px;
}

.question-list a:hover {
  text-decoration: none;
  border-color: var(--ink-deep);
  color: var(--ink-deep);
}

.hero-col-figure {
  min-width: 0;
}

.hero-col-figure img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.service-table-section,
.note-strip-section,
.schedule-section,
.delivery-brief-section,
.faq-preview-section {
  padding: 48px 0;
  border-bottom: 1px solid var(--rule);
}

.service-table-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 0.42fr);
  gap: var(--col-gap);
  align-items: start;
}

.service-table-main {
  min-width: 0;
  overflow-x: auto;
}

.service-table-aside {
  min-width: 0;
}

.aside-box {
  margin-top: 0;
  padding: 20px;
}

.aside-box h3 {
  font-size: 18px;
  line-height: 1.5;
  margin: 0 0 10px;
}

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

.aside-box .text-link {
  margin-top: 12px;
}

.note-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 28px;
}

.note-item {
  display: block;
  min-width: 0;
  color: var(--ink);
}

.note-item:hover {
  text-decoration: none;
}

.note-item:hover .note-title {
  text-decoration: underline;
  text-decoration-color: var(--accent);
  text-underline-offset: 3px;
}

.note-figure img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.note-month {
  margin: 10px 0 4px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--accent);
}

.note-title {
  font-size: 18px;
  line-height: 1.5;
  margin: 0 0 6px;
}

.note-excerpt {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
}

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

.stage-row {
  display: grid;
  grid-template-columns: 60px minmax(0, 1fr) minmax(0, 1fr) minmax(0, 1.2fr);
  gap: 20px;
  align-items: baseline;
  padding: 16px 8px;
  border-bottom: 1px solid var(--rule);
}

.stage-row:hover {
  background-color: var(--paper-card);
}

.stage-no {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--accent);
}

.stage-name {
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
}

.stage-party {
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.stage-output {
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
}

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

.brief-box {
  min-width: 0;
  padding: 22px 24px;
  background-color: var(--paper-card);
  border: 1px solid var(--rule);
  border-radius: 6px;
}

.brief-title {
  font-size: 18px;
  line-height: 1.5;
  margin: 0 0 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--rule);
}

.boundary-band-section {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 0.72fr);
  gap: 48px;
  align-items: center;
  padding: 48px 0 8px;
}

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

.boundary-text h2 {
  font-size: 24px;
  line-height: 1.4;
  margin: 0 0 12px;
}

.boundary-text p {
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-soft);
  margin: 0 0 12px;
}

.boundary-text .btn {
  margin-top: 8px;
}

.boundary-figure {
  min-width: 0;
}

.boundary-figure img {
  width: 100%;
  aspect-ratio: 5 / 4;
  object-fit: cover;
}

/* —— 服务条目页 —— */

.page-service-catalog .page-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) var(--aside-col);
  gap: var(--col-gap);
  align-items: start;
  margin-top: 28px;
}

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

.content-main > .breadcrumb {
  padding-top: 0;
}

.content-main > .page-header {
  padding-top: 6px;
}

.content-aside {
  min-width: 0;
  position: sticky;
  top: 20px;
}

.aside-title {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin: 0 0 12px;
}

.aside-toc {
  padding: 18px 20px;
  background-color: var(--paper-card);
  border: 1px solid var(--rule);
  border-radius: 6px;
}

.aside-label {
  margin: 0 0 10px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.aside-toc-list li {
  margin-bottom: 6px;
  min-width: 0;
}

.aside-toc-list a {
  display: flex;
  gap: 8px;
  align-items: baseline;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-deep);
}

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

.toc-no {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--accent);
  flex-shrink: 0;
}

.aside-note {
  margin-top: 20px;
  padding: 18px 20px;
  background-color: var(--tint);
  border-radius: 6px;
}

.aside-note p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
  margin: 0 0 8px;
}

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

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

.entry-index,
.entry-list,
.combination-section {
  margin-top: 36px;
}

.entry-index h2,
.entry-list h2,
.combination-section h2 {
  font-size: 24px;
  line-height: 1.4;
  margin: 0 0 8px;
}

.entry-index-table {
  margin-top: 14px;
}

.entry {
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--rule);
}

.entry:first-of-type {
  margin-top: 20px;
}

.entry-no {
  margin: 0 0 6px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--accent);
}

.entry h3 {
  font-size: 20px;
  line-height: 1.45;
  margin: 0 0 10px;
}

.entry-lead {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink);
}

.entry h4 {
  font-size: 15px;
  line-height: 1.6;
  margin: 16px 0 8px;
  color: var(--ink-deep);
}

.entry-tasks {
  padding-left: 0;
}

.entry-tasks li {
  position: relative;
  padding-left: 18px;
  margin-bottom: 6px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.entry-tasks li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 0.85em;
  width: 6px;
  height: 1px;
  background-color: var(--mark);
}

.entry-scope {
  margin: 12px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.entry-tag {
  display: inline-block;
  margin: 2px 6px 2px 0;
  padding: 2px 10px;
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.6;
  color: var(--ink-deep);
  background-color: var(--tint);
  border-radius: 4px;
}

.combination-list {
  margin-top: 16px;
  display: grid;
  gap: 16px;
}

.combination-item {
  padding: 16px 18px;
  background-color: var(--paper-card);
  border: 1px solid var(--rule);
  border-radius: 6px;
}

.combination-pair {
  margin: 0 0 4px;
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--accent);
}

.combination-purpose {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink);
}

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

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

.content-media-inline {
  margin-top: 22px;
}

.content-media-inline img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

/* —— 场景札记页 —— */

.page-scenario-notes .page-head {
  padding-top: 18px;
}

.year-index,
.note-summary,
.note-groups,
.common-difficulties,
.scene-to-entry {
  margin-top: 40px;
}

.year-index-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 14px;
}

.year-chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 8px 22px;
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--ink-deep);
  background-color: var(--paper-card);
  border: 1px solid var(--rule);
  border-radius: 4px;
}

.year-chip:hover {
  text-decoration: none;
  border-color: var(--ink-deep);
  background-color: var(--ink-deep);
  color: var(--paper-card);
}

.summary-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 0.72fr);
  gap: var(--col-gap);
  align-items: start;
  margin-top: 18px;
}

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

.summary-text p {
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink);
}

.summary-figure {
  min-width: 0;
}

.summary-figure img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.year-group {
  margin-top: 32px;
}

.year-heading {
  font-family: var(--mono);
  font-size: 15px;
  letter-spacing: 0.08em;
  color: var(--ink-deep);
  padding-bottom: 8px;
  border-bottom: 2px solid var(--ink-deep);
  margin: 0 0 8px;
}

.month-group {
  margin-top: 18px;
}

.month-heading {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 10px;
}

.note-entry {
  margin-bottom: 18px;
}

.note-link {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 22px;
  align-items: start;
  padding: 14px;
  background-color: var(--paper-card);
  border: 1px solid var(--rule);
  border-radius: 6px;
  color: var(--ink);
}

.note-link:hover {
  text-decoration: none;
  border-color: var(--ink-deep);
}

.note-link:hover .note-title {
  text-decoration: underline;
  text-decoration-color: var(--accent);
  text-underline-offset: 3px;
}

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

.note-media img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

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

.note-tag {
  display: inline-block;
  margin: 0 0 6px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--accent);
}

.note-body .note-title {
  font-size: 18px;
  line-height: 1.5;
  margin: 0 0 6px;
}

.note-desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
}

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

.difficulty-item {
  min-width: 0;
  padding: 18px 20px;
  background-color: var(--paper-card);
  border: 1px solid var(--rule);
  border-radius: 6px;
}

.difficulty-title {
  font-size: 16px;
  line-height: 1.5;
  margin: 0 0 6px;
  color: var(--ink-deep);
}

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

.scene-table {
  margin-top: 18px;
}

.scene-table td:first-child {
  width: 42%;
  color: var(--ink);
}

.scene-table td:last-child a {
  color: var(--ink-deep);
  border-bottom: 1px solid var(--accent);
}

/* —— 协作排期页 —— */

.page-engagement-process .page-head {
  padding-top: 18px;
}

.stage-table,
.stage-details,
.material-list,
.change-rules {
  margin-top: 40px;
}

.table-wrap {
  overflow-x: auto;
  margin-top: 16px;
}

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

.data-table td a {
  color: var(--ink-deep);
  border-bottom: 1px solid var(--accent);
}

.stage-figure {
  margin-top: 18px;
}

.stage-figure img {
  width: 100%;
  aspect-ratio: 21 / 9;
  object-fit: cover;
}

.stage-block {
  margin-top: 28px;
  padding-top: 22px;
  border-top: 1px solid var(--rule);
}

.stage-block h3 {
  font-size: 20px;
  line-height: 1.45;
  margin: 0 0 14px;
}

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

.stage-col {
  min-width: 0;
}

.stage-col-text {
  min-width: 0;
}

.stage-col-title {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin: 0 0 8px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--rule);
}

.plain-list li {
  position: relative;
  padding-left: 16px;
  margin-bottom: 6px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink);
}

.plain-list li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 0.85em;
  width: 5px;
  height: 1px;
  background-color: var(--mark);
}

.stage-ref {
  margin-top: 14px;
  font-size: 14px;
  line-height: 1.8;
}

.stage-ref a {
  color: var(--ink-deep);
  border-bottom: 1px solid var(--accent);
}

.material-list .checklist {
  margin-top: 16px;
}

.rule-list {
  margin-top: 16px;
  display: grid;
  gap: 18px;
}

.rule-item {
  padding: 18px 20px;
  background-color: var(--paper-card);
  border-left: 3px solid var(--ink-deep);
  border-radius: 4px;
}

.rule-title {
  font-size: 16px;
  line-height: 1.5;
  margin: 0 0 6px;
}

.rule-text {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-soft);
}

/* —— 交付与验收页 —— */

.page-delivery-standard .page-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) var(--aside-col);
  gap: var(--col-gap);
  align-items: start;
  margin-top: 28px;
}

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

.delivery-list,
.acceptance-check,
.rework,
.out-of-scope {
  margin-top: 36px;
}

.delivery-list:first-child {
  margin-top: 0;
}

.main-column h2 {
  font-size: 24px;
  line-height: 1.4;
  margin: 0 0 8px;
}

.content-figure {
  margin-top: 16px;
}

.content-figure img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.delivery-checklist,
.acceptance-checklist {
  margin-top: 16px;
}

.rework-blocks {
  display: grid;
  gap: 16px;
  margin-top: 16px;
}

.rework-block {
  padding: 16px 18px;
  background-color: var(--paper-card);
  border: 1px solid var(--rule);
  border-radius: 6px;
}

.rework-title {
  font-size: 16px;
  line-height: 1.5;
  margin: 0 0 6px;
  color: var(--ink-deep);
}

.rework-block p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-soft);
}

.scope-list {
  margin-top: 16px;
  display: grid;
  gap: 12px;
}

.scope-item {
  padding: 14px 18px;
  background-color: var(--tint);
  border-radius: 6px;
}

.scope-title {
  font-size: 15px;
  line-height: 1.5;
  margin: 0 0 4px;
  color: var(--accent);
}

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

.terms {
  min-width: 0;
  position: sticky;
  top: 20px;
}

.terms h2 {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin: 0 0 12px;
}

.terms-block {
  padding: 18px 20px;
  background-color: var(--paper-card);
  border: 1px solid var(--rule);
  border-radius: 6px;
}

.terms-block + .terms-block {
  margin-top: 18px;
}

.terms-subtitle {
  font-size: 15px;
  line-height: 1.5;
  margin: 0 0 10px;
  color: var(--ink-deep);
}

.term-list {
  margin: 0;
}

.term-item {
  margin-bottom: 10px;
}

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

.term-item dt {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--accent);
  margin-bottom: 2px;
}

.term-item dd {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.terms-tip p {
  margin: 0 0 10px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
}

/* —— 答疑摘编页 —— */

.page-faq .page-head {
  padding-top: 18px;
}

.page-figure {
  margin-top: 24px;
}

.page-figure img {
  width: 100%;
  aspect-ratio: 21 / 9;
  object-fit: cover;
}

.faq-groups {
  margin-top: 40px;
}

.faq-groups > h2 {
  font-size: 24px;
  line-height: 1.4;
  margin: 0 0 20px;
}

.faq-group {
  margin-top: 28px;
}

.faq-group h3 {
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-deep);
  padding-bottom: 8px;
  border-bottom: 2px solid var(--ink-deep);
  margin: 0 0 4px;
}

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

.faq-group summary {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  min-height: 52px;
  padding: 14px 0;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.6;
  color: var(--ink);
  cursor: pointer;
  list-style: none;
}

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

.faq-group summary::after {
  content: "+";
  flex-shrink: 0;
  font-family: var(--mono);
  font-size: 18px;
  font-weight: 400;
  color: var(--accent);
  line-height: 1.4;
}

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

.faq-group .faq-answer {
  padding: 0 0 16px;
}

.correction-note {
  margin-top: 44px;
  padding: 24px;
  background-color: var(--paper-card);
  border: 1px solid var(--rule);
  border-radius: 6px;
}

.correction-note h2 {
  font-size: 20px;
  line-height: 1.45;
  margin: 0 0 12px;
}

.correction-note p {
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-soft);
  margin: 0 0 10px;
}

.correction-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  margin-top: 14px;
}

.correction-links a {
  font-size: 15px;
  color: var(--ink-deep);
  border-bottom: 1px solid var(--accent);
  padding-bottom: 1px;
}

.correction-links a:hover {
  text-decoration: none;
  color: var(--accent);
}

/* —— 关于与边界页 —— */

.page-about .page-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) var(--aside-col);
  gap: var(--col-gap);
  align-items: start;
  margin-top: 28px;
}

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

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

.content-section:first-child {
  margin-top: 0;
}

.content-section h2 {
  font-size: 24px;
  line-height: 1.4;
  margin: 0 0 12px;
}

.content-section p {
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink);
  margin: 0 0 12px;
}

.content-section p:last-child {
  margin-bottom: 0;
}

.principle-list {
  margin-top: 16px;
  display: grid;
  gap: 16px;
}

.principle-item {
  padding: 16px 18px;
  background-color: var(--paper-card);
  border-left: 3px solid var(--ink-deep);
  border-radius: 4px;
}

.principle-title {
  font-size: 16px;
  line-height: 1.5;
  margin: 0 0 6px;
}

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

.boundary-list {
  margin-top: 16px;
}

.boundary-item {
  position: relative;
  padding: 10px 0 10px 24px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink);
  border-bottom: 1px solid var(--rule);
}

.boundary-item:last-child {
  border-bottom: 0;
}

.boundary-item::before {
  content: "×";
  position: absolute;
  left: 0;
  top: 10px;
  font-family: var(--mono);
  font-size: 14px;
  color: var(--accent);
}

.path-link-list {
  margin-top: 14px;
  display: grid;
  gap: 10px;
}

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

.path-link-list a:hover {
  text-decoration: none;
  color: var(--accent);
}

.sidebar {
  min-width: 0;
  position: sticky;
  top: 20px;
}

.sidebar-figure {
  margin-bottom: 20px;
}

.sidebar-figure img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.sidebar-block {
  padding: 18px 20px;
  background-color: var(--paper-card);
  border: 1px solid var(--rule);
  border-radius: 6px;
}

.sidebar-title {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin: 0 0 10px;
}

.key-entry-list li {
  margin-bottom: 8px;
}

.key-entry-list li:last-child {
  margin-bottom: 0;
}

.key-entry-list a {
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-deep);
  border-bottom: 1px solid var(--accent);
  padding-bottom: 1px;
}

.key-entry-list a:hover {
  text-decoration: none;
  color: var(--accent);
}

/* —— 404 页 —— */

.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 72px 24px;
}

.error-inner {
  max-width: 640px;
  width: 100%;
}

.error-title {
  font-size: 34px;
  line-height: 1.35;
  margin: 0 0 12px;
}

.error-main .abstract {
  margin-top: 0;
}

.error-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 24px;
}

.error-links {
  margin-top: 28px;
  padding-top: 18px;
  border-top: 1px solid var(--rule);
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
}

.error-links a {
  font-size: 15px;
  color: var(--ink-deep);
  border-bottom: 1px solid var(--accent);
  padding-bottom: 1px;
}

.error-links a:hover {
  text-decoration: none;
  color: var(--accent);
}

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

@media (max-width: 900px) {
  .header-inner {
    gap: 16px;
    flex-wrap: wrap;
    padding: 10px 20px;
    min-height: 0;
  }

  .brand {
    flex: 1 1 auto;
  }

  .site-nav {
    display: none;
  }

  .nav-cta {
    display: none;
  }

  .menu-toggle {
    display: flex;
  }

  .home-main,
  .inner-main {
    padding: 0 20px 56px;
  }

  .page-title,
  .error-title {
    font-size: 28px;
  }

  .hero-index {
    grid-template-columns: minmax(0, 1fr);
    gap: 28px;
    padding: 28px 0 40px;
  }

  .hero-col-text h1 {
    font-size: 28px;
  }

  .hero-col-figure {
    order: 0;
  }

  .hero-col-text {
    order: 0;
  }

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

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

  .stage-row {
    grid-template-columns: 44px minmax(0, 1fr);
    gap: 4px 14px;
    padding: 14px 6px;
  }

  .stage-row .stage-name {
    grid-column: 2;
  }

  .stage-row .stage-party,
  .stage-row .stage-output {
    grid-column: 2;
  }

  .stage-row .stage-party::before {
    content: "参与方：";
    font-family: var(--mono);
    font-size: 11px;
    color: var(--ink-soft);
  }

  .stage-row .stage-output::before {
    content: "阶段产出：";
    font-family: var(--mono);
    font-size: 11px;
    color: var(--ink-soft);
  }

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

  .boundary-band-section {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
    padding: 40px 0 8px;
  }

  .page-service-catalog .page-layout,
  .page-delivery-standard .page-layout,
  .page-about .page-layout {
    grid-template-columns: minmax(0, 1fr);
    gap: 32px;
  }

  .content-aside,
  .terms,
  .sidebar {
    position: static;
  }

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

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

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

  .stage-block-body {
    grid-template-columns: minmax(0, 1fr);
    gap: 16px;
  }

  .footer-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 28px 32px;
    padding: 28px 20px;
  }

  .footer-related,
  .footer-bottom {
    padding-left: 20px;
    padding-right: 20px;
  }
}

@media (max-width: 640px) {
  body {
    font-size: 16px;
    line-height: 1.85;
  }

  .header-inner {
    padding: 10px 16px;
  }

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

  .home-main,
  .inner-main {
    padding: 0 16px 48px;
  }

  .page-title,
  .error-title {
    font-size: 26px;
    line-height: 1.4;
  }

  .hero-col-text h1 {
    font-size: 26px;
  }

  .section-head h2,
  .section-title,
  .content-section h2,
  .main-column h2,
  .faq-groups > h2,
  .entry-index h2,
  .entry-list h2,
  .combination-section h2,
  .boundary-text h2 {
    font-size: 21px;
  }

  .hero-actions {
    gap: 10px;
  }

  .hero-actions .btn {
    flex: 1 1 auto;
  }

  .note-strip {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
  }

  .service-table-main {
    overflow-x: visible;
  }

  .entry-table,
  .entry-index-table,
  .data-table,
  .scene-table {
    font-size: 14px;
  }

  .entry-table thead,
  .entry-index-table thead,
  .scene-table thead {
    display: none;
  }

  .entry-table tr,
  .entry-index-table tr,
  .scene-table tr {
    display: block;
    padding: 12px 0;
    border-bottom: 1px solid var(--rule);
  }

  .entry-table td,
  .entry-index-table td,
  .scene-table td {
    display: block;
    padding: 3px 0;
    border-bottom: 0;
  }

  .entry-table td.cell-no,
  .entry-index-table td.cell-no {
    font-size: 11px;
  }

  .data-table {
    min-width: 0;
  }

  .data-table thead {
    display: none;
  }

  .data-table tr {
    display: block;
    padding: 12px 0;
    border-bottom: 1px solid var(--rule);
  }

  .data-table td {
    display: block;
    padding: 3px 0;
    border-bottom: 0;
  }

  .data-table td:first-child {
    font-family: var(--mono);
    font-size: 12px;
    color: var(--accent);
  }

  .scene-table td:first-child {
    width: auto;
    font-weight: 700;
  }

  .checklist-item {
    gap: 12px;
    padding: 14px 0;
  }

  .brief-box {
    padding: 18px 18px;
  }

  .abstract-box,
  .abstract {
    padding: 16px;
  }

  .faq-toggle,
  .faq-group summary {
    min-height: 48px;
    font-size: 15px;
  }

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

  .footer-related,
  .footer-bottom {
    padding-left: 16px;
    padding-right: 16px;
  }

  .footer-related {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .related-links {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

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

  .correction-note {
    padding: 18px;
  }
}