/* ============================================================
   Base — 基础变量、重置与全局元素
   ============================================================ */
:root {
  --color-bg: #f4f3ee;
  --color-ink: #22241f;
  --color-green: #1f8a5b;
  --color-yellow: #b58500;
  --color-terminal: #171a15;
  --color-line: #d8d6cb;
  --color-muted: #6b6e63;
  --font-mono: "JetBrains Mono", "SFMono-Regular", Consolas, "Courier New", monospace;
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --container-w: 1120px;
  --header-h: 68px;
  --radius: 6px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  color: var(--color-ink);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--color-ink);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

ul,
ol {
  list-style: none;
}

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

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ============================================================
   Layout — 全站容器与骨架
   ============================================================ */
.site-header {
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-line);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-shell {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 24px;
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand-logo {
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--color-ink);
  white-space: nowrap;
}

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

.site-nav {
  display: flex;
  align-items: center;
  gap: 12px;
}

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

.nav-list li a {
  display: block;
  padding: 8px 14px;
  font-size: 15px;
  border-radius: var(--radius);
  color: var(--color-ink);
}

.nav-list li a:hover {
  background: rgba(31, 138, 91, 0.08);
  color: var(--color-green);
}

.nav-list li a.is-current {
  color: var(--color-green);
  font-weight: 600;
  background: rgba(31, 138, 91, 0.08);
}

.btn-cooperation {
  display: inline-block;
  padding: 9px 20px;
  background: var(--color-ink);
  color: var(--color-bg);
  font-size: 14px;
  border-radius: var(--radius);
  font-family: var(--font-mono);
  white-space: nowrap;
}

.btn-cooperation:hover {
  background: var(--color-green);
  color: #fff;
}

.btn-cooperation.is-current {
  background: var(--color-green);
  color: #fff;
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  width: 44px;
  height: 44px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
}

.nav-toggle-icon {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--color-ink);
  position: relative;
}

.nav-toggle-icon::before,
.nav-toggle-icon::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  background: var(--color-ink);
}

.nav-toggle-icon::before {
  top: -6px;
}

.nav-toggle-icon::after {
  top: 6px;
}

.site-main {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 24px;
}

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

/* 面包屑 */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 24px 0 0;
  font-size: 14px;
  color: var(--color-muted);
}

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

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

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

.breadcrumb-current {
  color: var(--color-ink);
  font-weight: 500;
}

/* 页头标题区 */
.page-header {
  padding: 32px 0 40px;
  border-bottom: 1px solid var(--color-line);
  margin-bottom: 48px;
}

.page-description {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-green);
  margin-bottom: 12px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.page-title {
  font-family: var(--font-mono);
  font-size: 32px;
  line-height: 1.3;
  font-weight: 700;
  color: var(--color-ink);
  margin-bottom: 12px;
}

.page-intro,
.page-lead {
  font-size: 16px;
  color: var(--color-muted);
  max-width: 720px;
}

/* 区块标题 */
.section-title {
  font-family: var(--font-mono);
  font-size: 24px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--color-ink);
  margin-bottom: 12px;
}

.section-desc,
.section-intro,
.section-lead {
  font-size: 15px;
  color: var(--color-muted);
  max-width: 720px;
  margin-bottom: 32px;
}

/* ============================================================
   Components — 通用组件
   ============================================================ */
/* 终端面板 */
.terminal-panel {
  background: var(--color-terminal);
  border-radius: var(--radius);
  padding: 24px 28px;
  color: #d8d6cb;
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.8;
  overflow-x: auto;
}

.terminal-line {
  color: var(--color-green);
  margin-bottom: 16px;
}

.terminal-prompt {
  color: var(--color-green);
  font-weight: 700;
}

/* 内容图片 */
.content-media {
  margin: 0;
  border-radius: var(--radius);
  overflow: hidden;
}

.content-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.content-media figcaption {
  padding: 8px 0;
  font-size: 13px;
  color: var(--color-muted);
}

/* 折叠问答 */
.faq-item {
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background: #fff;
  margin-bottom: 12px;
}

.faq-item summary {
  padding: 16px 20px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
  position: relative;
  padding-right: 48px;
}

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

.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 20px;
  color: var(--color-green);
}

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

.faq-answer {
  padding: 0 20px 20px;
  color: var(--color-muted);
  font-size: 15px;
}

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

/* 下一步引导 */
.next-steps,
.next-guide {
  margin-top: 64px;
  padding: 32px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background: #fff;
}

.next-steps-title,
.next-guide-title {
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 16px;
}

.next-steps p,
.guide-text {
  color: var(--color-muted);
  margin-bottom: 16px;
}

.guide-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.guide-links a,
.next-steps-list a {
  display: inline-block;
  padding: 8px 16px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  font-size: 14px;
  color: var(--color-ink);
  background: var(--color-bg);
}

.guide-links a:hover,
.next-steps-list a:hover {
  border-color: var(--color-green);
  color: var(--color-green);
}

.next-steps-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ============================================================
   Pages — 首页
   ============================================================ */
.home-main {
  padding-bottom: 72px;
}

/* 终端式首屏 */
.hero-terminal {
  padding: 48px 0 0;
}

.terminal-shell {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 48px;
  align-items: start;
}

.terminal-intro {
  padding-top: 16px;
}

.hero-title {
  font-family: var(--font-mono);
  font-size: 32px;
  line-height: 1.35;
  font-weight: 700;
  margin-bottom: 16px;
}

.hero-lead {
  font-size: 16px;
  color: var(--color-muted);
  margin-bottom: 24px;
  max-width: 420px;
}

.hero-cta {
  display: inline-block;
  padding: 12px 28px;
  background: var(--color-green);
  color: #fff;
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 14px;
}

.hero-cta:hover {
  background: var(--color-ink);
  color: var(--color-bg);
}

/* 服务分类目录 */
.service-catalog {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.catalog-item {
  background: var(--color-terminal);
  border-radius: var(--radius);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-height: 120px;
  transition: background 0.2s ease;
}

.catalog-item:hover {
  background: #22241f;
}

.catalog-code {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-green);
}

.catalog-name {
  font-family: var(--font-mono);
  font-size: 17px;
  font-weight: 700;
  color: #f4f3ee;
}

.catalog-desc {
  font-size: 13px;
  color: #a8aaa0;
  line-height: 1.6;
}

/* 终端状态行 */
.terminal-status {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--color-terminal);
  border-radius: var(--radius);
  padding: 12px 20px;
  margin-top: 24px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: #a8aaa0;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-green);
  flex-shrink: 0;
}

/* 首页主图 */
.content-media-primary {
  margin-top: 24px;
}

.content-media-primary img {
  aspect-ratio: 16 / 6;
}

/* 服务条目编号区 */
.service-lines {
  padding: 64px 0 0;
}

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

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

.line-item {
  display: grid;
  grid-template-columns: 80px 200px 1fr;
  gap: 24px;
  align-items: baseline;
  padding: 20px 8px;
  border-bottom: 1px solid var(--color-line);
  transition: background 0.2s ease;
}

.line-item:hover {
  background: #fff;
}

.line-code {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--color-green);
}

.line-name {
  font-family: var(--font-mono);
  font-size: 17px;
  font-weight: 700;
}

.line-scene {
  font-size: 15px;
  color: var(--color-muted);
}

/* 作品档案索引 */
.archive-index {
  padding: 64px 0 0;
}

.archive-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-bottom: 24px;
}

.archive-entry {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 20px;
  background: #fff;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 16px;
}

.archive-media img {
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: var(--radius);
}

.entry-title {
  font-family: var(--font-mono);
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 8px;
}

.entry-desc {
  font-size: 14px;
  color: var(--color-muted);
  margin-bottom: 12px;
  line-height: 1.6;
}

.entry-link {
  font-size: 14px;
  color: var(--color-green);
  font-weight: 600;
}

.archive-more,
.project-more,
.notes-more,
.cooperation-more,
.faq-more {
  display: inline-block;
  padding: 10px 24px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  font-size: 14px;
  background: #fff;
}

.archive-more:hover,
.project-more:hover,
.notes-more:hover,
.cooperation-more:hover,
.faq-more:hover {
  border-color: var(--color-green);
  color: var(--color-green);
}

/* 项目记录摘要 */
.project-summary {
  padding: 64px 0 0;
}

.timeline-flow {
  border-left: 2px solid var(--color-green);
  margin-left: 8px;
  padding-left: 32px;
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.timeline-node {
  position: relative;
}

.timeline-node::before {
  content: "";
  position: absolute;
  left: -39px;
  top: 8px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-green);
}

.node-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 4px;
}

.node-desc {
  font-size: 14px;
  color: var(--color-muted);
}

/* 创作手记摘要 */
.notes-summary {
  padding: 64px 0 0;
}

.notes-list {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 24px;
  margin-bottom: 24px;
}

.note-item {
  background: #fff;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 24px;
}

.note-title {
  font-family: var(--font-mono);
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 10px;
}

.note-benefit {
  font-size: 14px;
  color: var(--color-muted);
  margin-bottom: 12px;
  line-height: 1.6;
}

.note-meta {
  font-size: 13px;
  color: var(--color-yellow);
  font-family: var(--font-mono);
}

/* 合作方式预览 */
.cooperation-preview {
  padding: 64px 0 0;
}

.prep-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-bottom: 24px;
}

.prep-col {
  background: #fff;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 28px;
}

.col-title {
  font-family: var(--font-mono);
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 16px;
}

.col-list li {
  padding: 8px 0 8px 24px;
  position: relative;
  font-size: 14px;
  color: var(--color-muted);
}

.col-list li::before {
  content: ">";
  position: absolute;
  left: 0;
  color: var(--color-green);
  font-family: var(--font-mono);
}

/* 常见问题摘选 */
.faq-preview {
  padding: 64px 0 0;
}

.faq-preview .faq-item {
  max-width: 800px;
}

/* ============================================================
   Pages — 服务项目 txcm/services.html
   ============================================================ */
.services-overview {
  margin-bottom: 56px;
}

.service-item {
  background: #fff;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 32px;
  margin-bottom: 24px;
}

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

.service-num {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--color-green);
  background: rgba(31, 138, 91, 0.08);
  padding: 4px 10px;
  border-radius: var(--radius);
}

.service-name {
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
}

.service-scene {
  font-size: 14px;
  color: var(--color-yellow);
  font-family: var(--font-mono);
  margin-bottom: 8px;
}

.service-desc {
  color: var(--color-muted);
  line-height: 1.8;
}

/* 交付范围 */
.deliverables-panel {
  margin-bottom: 56px;
}

.deliverables-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px 32px;
}

.deliverable-item {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 8px;
  padding: 8px 0;
  border-bottom: 1px solid rgba(216, 214, 203, 0.2);
}

.deliverable-item dt {
  color: var(--color-green);
  font-weight: 700;
}

.deliverable-item dd {
  color: #a8aaa0;
  font-size: 13px;
}

/* 场景对照表 */
.scenario-table-section {
  margin-bottom: 56px;
}

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

.scenario-table th {
  background: var(--color-terminal);
  color: #f4f3ee;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  text-align: left;
  padding: 14px 20px;
}

.scenario-table td {
  padding: 14px 20px;
  border-top: 1px solid var(--color-line);
  font-size: 14px;
  color: var(--color-muted);
}

.scenario-table tr:nth-child(even) td {
  background: rgba(216, 214, 203, 0.15);
}

/* 服务页配图 */
.service-media {
  margin: 0 0 56px;
}

.service-media img {
  aspect-ratio: 16 / 7;
  object-fit: cover;
  border-radius: var(--radius);
}

.service-media figcaption {
  padding: 8px 0;
  font-size: 13px;
  color: var(--color-muted);
}

/* ============================================================
   Pages — 作品档案 txcm/archive.html
   ============================================================ */
.archive-section {
  margin-bottom: 56px;
}

.archive-section .section-intro {
  margin-bottom: 24px;
}

/* 分类目录 */
.category-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.category-item {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 16px;
  background: #fff;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 16px;
}

.category-media img {
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: var(--radius);
}

.category-name {
  font-family: var(--font-mono);
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 4px;
}

.category-tag {
  font-size: 12px;
  color: var(--color-green);
  font-family: var(--font-mono);
  margin-bottom: 8px;
}

.category-desc {
  font-size: 13px;
  color: var(--color-muted);
  line-height: 1.6;
  margin-bottom: 10px;
}

.category-link {
  font-size: 13px;
  color: var(--color-green);
  font-weight: 600;
}

/* 年份归档 */
.year-group {
  margin-bottom: 32px;
}

.year-label {
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 700;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-ink);
  margin-bottom: 16px;
}

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

.year-item {
  display: grid;
  grid-template-columns: 120px 1fr 180px;
  gap: 16px;
  padding: 12px 8px;
  border-bottom: 1px solid var(--color-line);
  align-items: baseline;
}

.item-type {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-green);
}

.item-name {
  font-size: 15px;
  font-weight: 500;
}

.item-note {
  font-size: 13px;
  color: var(--color-muted);
  text-align: right;
}

/* 精选条目 */
.featured-list {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 24px;
}

.featured-item {
  background: #fff;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  overflow: hidden;
}

.featured-media img {
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.featured-body {
  padding: 20px;
}

.featured-title {
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 6px;
}

.featured-meta {
  font-size: 13px;
  color: var(--color-green);
  font-family: var(--font-mono);
  margin-bottom: 10px;
}

.featured-desc {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.6;
  margin-bottom: 12px;
}

.featured-link {
  font-size: 14px;
  color: var(--color-green);
  font-weight: 600;
}

/* ============================================================
   Pages — 项目记录 txcm/project.html
   ============================================================ */
.section-block {
  margin-bottom: 56px;
}

.overview-content p {
  color: var(--color-muted);
  margin-bottom: 16px;
  max-width: 760px;
}

/* 阶段执行 */
.project-stages .section-desc {
  margin-bottom: 32px;
}

.stage-item {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: center;
  padding: 32px 0;
  border-bottom: 1px solid var(--color-line);
}

.stage-item h3 {
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 12px;
  grid-column: 1 / -1;
}

.stage-item p {
  color: var(--color-muted);
  line-height: 1.8;
}

.stage-figure {
  margin: 0;
}

.stage-figure img {
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: var(--radius);
}

.stage-figure figcaption {
  padding: 8px 0;
  font-size: 13px;
  color: var(--color-muted);
}

/* 交付清单 */
.deliverable-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px 32px;
}

.deliverable-list li {
  padding: 8px 0 8px 24px;
  position: relative;
  color: #a8aaa0;
  font-size: 14px;
}

.deliverable-list li::before {
  content: ">";
  position: absolute;
  left: 0;
  color: var(--color-green);
}

/* 经验说明 */
.experience-content p {
  color: var(--color-muted);
  margin-bottom: 16px;
  max-width: 760px;
}

/* ============================================================
   Pages — 创作手记 txcm/notes.html
   ============================================================ */
.notes-topics {
  margin-bottom: 56px;
}

.topic-list {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr 1fr;
  gap: 16px;
}

.topic-item {
  background: var(--color-terminal);
  border-radius: var(--radius);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-height: 110px;
  transition: background 0.2s ease;
}

.topic-item:hover {
  background: #22241f;
}

.topic-code {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-green);
}

.topic-name {
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 700;
  color: #f4f3ee;
}

.topic-desc {
  font-size: 13px;
  color: #a8aaa0;
  line-height: 1.5;
}

/* 文章列表 */
.notes-articles {
  margin-bottom: 56px;
}

.note-entry {
  background: #fff;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 28px;
  margin-bottom: 16px;
}

.note-meta {
  display: flex;
  gap: 16px;
  margin-bottom: 8px;
}

.note-category {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-green);
}

.note-duration {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-yellow);
}

.note-title {
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 10px;
}

.note-summary {
  color: var(--color-muted);
  margin-bottom: 10px;
  line-height: 1.7;
}

.note-audience {
  font-size: 14px;
  color: var(--color-yellow);
  margin-bottom: 12px;
}

.note-link {
  font-size: 14px;
  color: var(--color-green);
  font-weight: 600;
}

/* 手记配图 */
.notes-figure {
  margin: 0 0 56px;
}

.notes-figure img {
  aspect-ratio: 16 / 6;
  object-fit: cover;
  border-radius: var(--radius);
}

.notes-figure figcaption {
  padding: 8px 0;
  font-size: 13px;
  color: var(--color-muted);
}

/* 推荐文章 */
.notes-recommend {
  margin-bottom: 56px;
}

.recommend-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.recommend-item {
  background: #fff;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 24px;
}

.recommend-title {
  font-family: var(--font-mono);
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 10px;
}

.recommend-desc {
  font-size: 14px;
  color: var(--color-muted);
  margin-bottom: 12px;
  line-height: 1.6;
}

.recommend-link {
  font-size: 14px;
  color: var(--color-green);
  font-weight: 600;
}

/* ============================================================
   Pages — 合作方式 txcm/cooperation.html
   ============================================================ */
.coop-process {
  margin-bottom: 56px;
}

.content-media-inline {
  margin: 0 0 24px;
}

.content-media-inline img {
  aspect-ratio: 16 / 7;
  object-fit: cover;
}

.coop-process .section-lead {
  margin-bottom: 32px;
}

.process-timeline {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.process-item {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 32px;
  padding: 24px 0;
  border-bottom: 1px solid var(--color-line);
}

.process-item:last-child {
  border-bottom: none;
}

.process-meta {
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.process-num {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--color-green);
}

.process-name {
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 700;
}

.process-body p {
  color: var(--color-muted);
  margin-bottom: 8px;
  line-height: 1.7;
}

.process-output {
  font-size: 14px;
  color: var(--color-yellow);
}

/* 双方准备事项 */
.coop-prepare {
  margin-bottom: 56px;
}

.prepare-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.prepare-col {
  background: #fff;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 28px;
}

.prepare-col h3 {
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-line);
}

.prepare-list li {
  padding: 8px 0 8px 24px;
  position: relative;
  font-size: 14px;
  color: var(--color-muted);
}

.prepare-list li::before {
  content: ">";
  position: absolute;
  left: 0;
  color: var(--color-green);
  font-family: var(--font-mono);
}

/* 关键节点 */
.coop-milestones {
  margin-bottom: 56px;
}

.milestone-list {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr 1fr;
  gap: 16px;
}

.milestone-item {
  background: var(--color-terminal);
  border-radius: var(--radius);
  padding: 20px;
}

.milestone-item h3 {
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 700;
  color: var(--color-green);
  margin-bottom: 8px;
}

.milestone-item p {
  font-size: 13px;
  color: #a8aaa0;
  line-height: 1.6;
}

/* 反馈机制 */
.coop-feedback {
  margin-bottom: 56px;
}

.feedback-panel {
  background: var(--color-terminal);
  border-radius: var(--radius);
  padding: 28px;
  color: #d8d6cb;
}

.feedback-panel p {
  color: #a8aaa0;
  margin-bottom: 16px;
  line-height: 1.7;
}

.feedback-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px 32px;
}

.feedback-list li {
  padding: 8px 0;
  font-size: 14px;
  color: #a8aaa0;
}

.feedback-list li strong {
  color: var(--color-green);
  font-weight: 700;
  margin-right: 8px;
}

/* ============================================================
   Pages — 常见问题 txcm/faq.html
   ============================================================ */
.faq-category-index {
  margin-bottom: 56px;
}

.faq-category-index .category-grid {
  grid-template-columns: 1fr 1fr 1fr 1fr;
}

.category-card {
  background: #fff;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 24px;
}

.category-card h3 {
  font-family: var(--font-mono);
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 8px;
}

.category-card p {
  font-size: 14px;
  color: var(--color-muted);
  margin-bottom: 12px;
  line-height: 1.6;
}

.category-card a {
  font-size: 14px;
  color: var(--color-green);
  font-weight: 600;
}

.faq-accordion {
  margin-bottom: 56px;
}

.faq-accordion .faq-item {
  max-width: 800px;
}

.faq-accordion .faq-item summary {
  font-size: 15px;
}

/* 问题准备指南 */
.faq-guide {
  margin-bottom: 56px;
}

.guide-steps {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr 1fr;
  gap: 16px;
  margin-bottom: 32px;
}

.guide-step {
  background: #fff;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 24px;
}

.guide-step h3 {
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 700;
  color: var(--color-green);
  margin-bottom: 10px;
}

.guide-step p {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.6;
}

.guide-image img {
  aspect-ratio: 16 / 5;
  object-fit: cover;
  border-radius: var(--radius);
}

/* ============================================================
   Pages — 404
   ============================================================ */
.error-main {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 80px 24px;
  min-height: 60vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.error-panel {
  text-align: left;
  max-width: 560px;
  width: 100%;
}

.error-code {
  font-family: var(--font-mono);
  font-size: 64px;
  font-weight: 700;
  color: var(--color-green);
  line-height: 1;
  margin-bottom: 16px;
}

.error-panel h1 {
  font-family: var(--font-mono);
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 12px;
}

.error-desc {
  color: var(--color-muted);
  margin-bottom: 24px;
}

.btn-back-home {
  display: inline-block;
  padding: 12px 28px;
  background: var(--color-ink);
  color: var(--color-bg);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 14px;
}

.btn-back-home:hover {
  background: var(--color-green);
  color: #fff;
}

/* ============================================================
   Footer — 页脚
   ============================================================ */
.site-footer {
  background: var(--color-terminal);
  color: #a8aaa0;
  margin-top: 72px;
}

.footer-shell {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 48px 24px 32px;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
}

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

.footer-logo {
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  color: #f4f3ee;
}

.footer-logo:hover {
  color: var(--color-green);
}

.footer-tagline {
  font-size: 14px;
  color: var(--color-green);
  font-family: var(--font-mono);
}

.footer-desc {
  font-size: 14px;
  line-height: 1.7;
  color: #a8aaa0;
}

.footer-title {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  color: #f4f3ee;
  margin-bottom: 16px;
}

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

.footer-links a {
  font-size: 14px;
  color: #a8aaa0;
}

.footer-links a:hover {
  color: var(--color-green);
}

.footer-bottom {
  border-top: 1px solid rgba(216, 214, 203, 0.15);
}

.footer-bottom p {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 20px 24px;
  font-size: 13px;
  color: #6b6e63;
  font-family: var(--font-mono);
}

/* ============================================================
   Responsive — 响应式断点
   ============================================================ */
@media (max-width: 1024px) {
  .terminal-shell {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .notes-list {
    grid-template-columns: 1fr 1fr;
  }

  .featured-list {
    grid-template-columns: 1fr 1fr;
  }

  .topic-list {
    grid-template-columns: 1fr 1fr;
  }

  .milestone-list {
    grid-template-columns: 1fr 1fr;
  }

  .guide-steps {
    grid-template-columns: 1fr 1fr;
  }

  .faq-category-index .category-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .header-shell {
    padding: 0 16px;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-list {
    display: none;
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-line);
    flex-direction: column;
    align-items: stretch;
    padding: 8px 16px 16px;
    gap: 0;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
  }

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

  .nav-list li a {
    padding: 12px 16px;
    font-size: 16px;
    border-radius: var(--radius);
  }

  .btn-cooperation {
    display: none;
  }

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

  .page-header {
    padding: 24px 0 32px;
    margin-bottom: 32px;
  }

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

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

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

  .line-item {
    grid-template-columns: 60px 1fr;
    gap: 8px 16px;
  }

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

  .archive-list {
    grid-template-columns: 1fr;
  }

  .archive-entry {
    grid-template-columns: 120px 1fr;
  }

  .notes-list {
    grid-template-columns: 1fr;
  }

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

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

  .year-item {
    grid-template-columns: 90px 1fr;
  }

  .item-note {
    grid-column: 2;
    text-align: left;
  }

  .featured-list {
    grid-template-columns: 1fr;
  }

  .stage-item {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .deliverable-list {
    grid-template-columns: 1fr;
  }

  .topic-list {
    grid-template-columns: 1fr 1fr;
  }

  .recommend-list {
    grid-template-columns: 1fr;
  }

  .process-item {
    grid-template-columns: 1fr;
    gap: 8px;
  }

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

  .milestone-list {
    grid-template-columns: 1fr 1fr;
  }

  .feedback-list {
    grid-template-columns: 1fr;
  }

  .guide-steps {
    grid-template-columns: 1fr 1fr;
  }

  .faq-category-index .category-grid {
    grid-template-columns: 1fr;
  }

  .footer-shell {
    grid-template-columns: 1fr 1fr;
    gap: 32px 24px;
    padding: 40px 16px 24px;
  }

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

  .deliverables-list {
    grid-template-columns: 1fr;
  }

  .scenario-table {
    display: block;
    overflow-x: auto;
  }

  .scenario-table th,
  .scenario-table td {
    white-space: nowrap;
  }
}

@media (max-width: 480px) {
  .archive-entry {
    grid-template-columns: 1fr;
  }

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

  .category-item {
    grid-template-columns: 1fr;
  }

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

  .topic-list {
    grid-template-columns: 1fr;
  }

  .milestone-list {
    grid-template-columns: 1fr;
  }

  .guide-steps {
    grid-template-columns: 1fr;
  }

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

  .footer-brand {
    grid-column: auto;
  }

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