/* ==========================================================================
   欲漫天堂 · 全站样式表
   视觉方向：明亮、有秩序感的漫画教室风格
   基础色：奶白底、深青标题、橙红强调、鼠尾草绿辅助、暖黄点缀
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Base —— 基础重置、字体、色彩变量、通用元素
   -------------------------------------------------------------------------- */
:root {
  --color-bg: #F7F3EB;
  --color-bg-soft: #fdfbf6;
  --color-ink: #2D3E40;
  --color-ink-soft: #4a5a5c;
  --color-accent: #E2703A;
  --color-accent-dark: #c95c2a;
  --color-teal: #4A7C71;
  --color-teal-dark: #3a655c;
  --color-gold: #E9B44C;
  --color-card: #ffffff;
  --color-line: #e7dfd1;
  --color-line-soft: #efe8dc;

  --font-stack: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;

  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;

  --shadow-sm: 0 1px 3px rgba(45, 62, 64, 0.06);
  --shadow-md: 0 6px 18px rgba(45, 62, 64, 0.08);
  --shadow-lg: 0 12px 32px rgba(45, 62, 64, 0.12);

  --container-w: 1200px;
  --gutter: 24px;
  --space-section: 72px;
  --header-h: 72px;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-stack);
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-ink);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

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

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

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

ul,
ol {
  list-style: none;
}

h1,
h2,
h3,
h4 {
  line-height: 1.3;
  font-weight: 700;
  color: var(--color-ink);
}

h1 {
  font-size: 34px;
}

h2 {
  font-size: 26px;
}

h3 {
  font-size: 18px;
}

p {
  margin-bottom: 0.9em;
}

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

strong {
  font-weight: 600;
}

figure {
  margin: 0;
}

figcaption {
  font-size: 14px;
  color: var(--color-ink-soft);
  line-height: 1.6;
  margin-top: 8px;
  text-align: center;
}

details summary {
  cursor: pointer;
}

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

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

/* --------------------------------------------------------------------------
   2. Layout —— 全局布局骨架：页头、页脚、主容器、面包屑、页面标题、侧栏
   -------------------------------------------------------------------------- */

/* ---------- 站点页头 ---------- */
.site-header {
  background-color: var(--color-bg-soft);
  border-bottom: 1px solid var(--color-line);
  position: sticky;
  top: 0;
  z-index: 100;
}

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

.brand-logo {
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
}

.brand-name {
  font-size: 24px;
  font-weight: 700;
  color: var(--color-ink);
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.brand-name::before {
  content: "";
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 2px;
  background-color: var(--color-accent);
  margin-right: 10px;
  transform: rotate(45deg);
}

/* ---------- 主导航 ---------- */
.site-nav {
  flex: 1;
  display: flex;
  justify-content: center;
}

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

.nav-list li a {
  display: block;
  padding: 8px 14px;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-ink-soft);
  border-radius: var(--radius-sm);
  white-space: nowrap;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.nav-list li a:hover {
  color: var(--color-accent);
  background-color: rgba(226, 112, 58, 0.08);
}

.nav-list li a.is-current {
  color: var(--color-accent);
  background-color: rgba(226, 112, 58, 0.1);
  font-weight: 600;
}

.header-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 9px 20px;
  background-color: var(--color-accent);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-md);
  flex-shrink: 0;
  transition: background-color 0.2s ease, transform 0.2s ease;
}

.header-cta:hover {
  background-color: var(--color-accent-dark);
  color: #fff;
  transform: translateY(-1px);
}

/* 移动端汉堡按钮 */
.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  flex-shrink: 0;
}

.nav-toggle-icon {
  display: block;
  width: 20px;
  height: 2px;
  background-color: var(--color-ink);
  position: relative;
}

.nav-toggle-icon::before,
.nav-toggle-icon::after {
  content: "";
  position: absolute;
  left: 0;
  width: 20px;
  height: 2px;
  background-color: var(--color-ink);
}

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

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

/* ---------- 主内容 ---------- */
.site-main {
  min-height: 60vh;
}

.inner-main {
  padding-bottom: var(--space-section);
}

/* ---------- 面包屑 ---------- */
.breadcrumb {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 18px var(--gutter) 0;
  font-size: 14px;
  color: var(--color-ink-soft);
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
}

.breadcrumb a {
  color: var(--color-ink-soft);
  transition: color 0.2s ease;
}

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

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

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

/* ---------- 页面标题区（内页统一） ---------- */
.page-header {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 32px var(--gutter) 36px;
}

.page-title {
  font-size: 34px;
  margin-bottom: 12px;
}

.page-description {
  font-size: 16px;
  color: var(--color-ink-soft);
  max-width: 760px;
  line-height: 1.8;
}

.page-description a {
  color: var(--color-teal);
  font-weight: 500;
  border-bottom: 1px dashed var(--color-teal);
}

/* ---------- 通用内容容器 ---------- */
.layout-shell {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

/* 左栏目录 + 右正文的两栏容器 */
.layout-wrap {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.page-layout {
  display: grid;
  grid-template-columns: 240px minmax(0, 1fr);
  gap: 40px;
  align-items: start;
}

.page-layout .sidebar {
  position: sticky;
  top: calc(var(--header-h) + 24px);
}

/* 侧栏在左的布局 */
.sidebar-left .page-layout {
  grid-template-columns: 240px minmax(0, 1fr);
}

.sidebar-left .page-layout .sidebar {
  order: 1;
}

.sidebar-left .page-layout .content {
  order: 2;
}

/* 课程页与帮助页的侧栏布局（aside 与主内容直接位于 .sidebar-left 内） */
.sidebar-left {
  display: grid;
  grid-template-columns: 240px minmax(0, 1fr);
  gap: 40px;
  align-items: start;
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.sidebar-left > aside {
  order: 1;
  position: sticky;
  top: calc(var(--header-h) + 24px);
}

.sidebar-left > div {
  order: 2;
  min-width: 0;
}

/* 合作页：页面级 .sidebar-left 结构 */
.page-layout.sidebar-left {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 40px;
  align-items: start;
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.page-layout.sidebar-left .sidebar {
  order: 1;
  position: sticky;
  top: calc(var(--header-h) + 24px);
}

.page-layout.sidebar-left .coop-content {
  order: 2;
  min-width: 0;
}

/* ---------- 学习路径页两栏 ---------- */
.learning-wrap {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 260px;
  gap: 40px;
  align-items: start;
}

.learning-wrap .roadmap {
  min-width: 0;
}

.learning-wrap .stage-aside {
  position: sticky;
  top: calc(var(--header-h) + 24px);
}

/* ---------- 页脚 ---------- */
.site-footer {
  background-color: #2b3a3c;
  color: rgba(255, 255, 255, 0.8);
  margin-top: 0;
}

.footer-inner {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 56px var(--gutter) 32px;
  display: grid;
  grid-template-columns: 1.6fr 0.8fr 0.9fr 0.9fr;
  gap: 40px;
}

.footer-brand {
  font-size: 20px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 12px;
}

.footer-brand::before {
  content: "";
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background-color: var(--color-accent);
  margin-right: 8px;
  transform: rotate(45deg);
}

.brand-col p:last-child {
  font-size: 14px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.6);
  max-width: 300px;
}

.footer-title {
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 14px;
}

.footer-col ul li {
  margin-bottom: 8px;
}

.footer-col ul li a {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.7);
  transition: color 0.2s ease;
}

.footer-col ul li a:hover {
  color: var(--color-gold);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 18px var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  max-width: var(--container-w);
  margin: 0 auto;
}

.footer-bottom p {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
  margin: 0;
}

.back-to-top {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.6);
  padding: 6px 12px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-sm);
  transition: color 0.2s ease, border-color 0.2s ease;
}

.back-to-top::before {
  content: "↑";
  font-size: 14px;
}

.back-to-top:hover {
  color: var(--color-gold);
  border-color: var(--color-gold);
}

/* 内页底部相关链接条 */
.related-links {
  max-width: var(--container-w);
  margin: 48px auto 0;
  padding: 20px var(--gutter);
  border-top: 1px solid var(--color-line);
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 14px;
}

.related-links-label {
  font-weight: 600;
  color: var(--color-ink);
  margin-right: 8px;
}

.related-links-item {
  display: inline-block;
  padding: 6px 16px;
  background-color: var(--color-bg-soft);
  border: 1px solid var(--color-line);
  border-radius: 999px;
  color: var(--color-ink-soft);
  font-size: 14px;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.related-links-item:hover {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
  color: #fff;
}

/* --------------------------------------------------------------------------
   3. Components —— 通用组件：按钮、卡片、侧栏、区块标题、列表、FAQ 等
   -------------------------------------------------------------------------- */

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  border-radius: var(--radius-md);
  font-size: 16px;
  font-weight: 600;
  line-height: 1.4;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background-color 0.2s ease, border-color 0.2s ease, transform 0.2s ease, color 0.2s ease;
}

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

.btn-primary:hover {
  background-color: var(--color-accent-dark);
  border-color: var(--color-accent-dark);
  color: #fff;
  transform: translateY(-2px);
}

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

.btn-secondary:hover {
  background-color: var(--color-ink);
  color: var(--color-bg);
  transform: translateY(-2px);
}

/* ---------- 区块标题 ---------- */
.section-heading {
  margin-bottom: 28px;
}

.section-heading h2 {
  font-size: 26px;
  margin-bottom: 8px;
  position: relative;
  padding-bottom: 12px;
}

.section-heading h2::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 36px;
  height: 3px;
  background-color: var(--color-accent);
  border-radius: 2px;
}

.section-heading .section-sub {
  font-size: 15px;
  color: var(--color-ink-soft);
  margin: 0;
}

.section-more {
  margin-top: 24px;
  text-align: right;
}

.section-more a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-teal);
}

.section-more a::after {
  content: "→";
  transition: transform 0.2s ease;
}

.section-more a:hover::after {
  transform: translateX(4px);
}

/* ---------- 侧栏通用 ---------- */
.sidebar-title,
.aside-title,
.toc-title,
.index-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-ink);
  padding-bottom: 12px;
  margin-bottom: 16px;
  border-bottom: 2px solid var(--color-line);
  position: relative;
}

.sidebar-title::after,
.aside-title::after,
.toc-title::after,
.index-title::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 32px;
  height: 2px;
  background-color: var(--color-accent);
}

.toc-list li,
.category-nav ul li,
.help-toc ul li,
.service-index ul li {
  margin-bottom: 4px;
}

.toc-list a,
.category-nav ul a,
.help-toc ul a,
.service-index ul a {
  display: block;
  padding: 8px 12px;
  font-size: 14px;
  color: var(--color-ink-soft);
  border-radius: var(--radius-sm);
  border-left: 2px solid transparent;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.toc-list a:hover,
.category-nav ul a:hover,
.help-toc ul a:hover,
.service-index ul a:hover {
  background-color: rgba(226, 112, 58, 0.08);
  color: var(--color-accent);
  border-left-color: var(--color-accent);
}

/* ---------- 侧栏底部辅助链接 ---------- */
.aside-link,
.about-link,
.toc-help-note a {
  display: block;
  margin-top: 16px;
  padding: 10px 12px;
  font-size: 14px;
  font-weight: 500;
  background-color: rgba(74, 124, 113, 0.1);
  color: var(--color-teal);
  border-radius: var(--radius-sm);
  transition: background-color 0.2s ease, color 0.2s ease;
}

.aside-link:hover,
.about-link:hover,
.toc-help-note a:hover {
  background-color: var(--color-teal);
  color: #fff;
}

/* ---------- 卡片悬停通用 ---------- */
.direction-card,
.stage-card,
.teacher-card,
.coop-service-item,
.faq-mini-card,
.support-card,
.highlight-item,
.more-card,
.advice-card,
.channel-card,
.service-card,
.ecosystem-card {
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.direction-card:hover,
.stage-card:hover,
.teacher-card:hover,
.coop-service-item:hover,
.faq-mini-card:hover,
.support-card:hover,
.highlight-item:hover,
.more-card:hover,
.advice-card:hover,
.channel-card:hover,
.service-card:hover,
.ecosystem-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

/* ---------- 步骤列表（帮助页 / 合作页共用差异化样式） ---------- */
.help-content .step-list {
  counter-reset: step-counter;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.help-content .step-item {
  display: flex;
  gap: 18px;
  align-items: flex-start;
  background-color: var(--color-bg-soft);
  border: 1px solid var(--color-line-soft);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  counter-increment: step-counter;
}

.help-content .step-number {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: var(--color-teal);
  color: #fff;
  font-size: 16px;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.help-content .step-text {
  padding-top: 2px;
}

/* 合作流程步骤 */
.process-steps .step-list {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.process-steps .step-item {
  background-color: var(--color-bg-soft);
  border: 1px solid var(--color-line-soft);
  border-radius: var(--radius-md);
  padding: 24px 20px;
  text-align: left;
  position: relative;
  counter-increment: coop-step;
}

.process-steps .step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background-color: var(--color-accent);
  color: #fff;
  font-size: 15px;
  font-weight: 700;
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
}

/* ---------- FAQ 手风琴（常见问题页） ---------- */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  background-color: var(--color-bg-soft);
  border: 1px solid var(--color-line-soft);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.faq-item details {
  padding: 0;
}

.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 24px;
  font-size: 16px;
  font-weight: 600;
  color: var(--color-ink);
  cursor: pointer;
  list-style: none;
  position: relative;
  transition: background-color 0.2s ease;
}

.faq-item summary::after {
  content: "+";
  font-size: 22px;
  font-weight: 400;
  color: var(--color-accent);
  flex-shrink: 0;
  transition: transform 0.25s ease;
}

.faq-item details[open] summary {
  background-color: rgba(226, 112, 58, 0.04);
}

.faq-item details[open] summary::after {
  transform: rotate(45deg);
}

.faq-answer {
  padding: 0 24px 20px;
  border-top: 1px dashed var(--color-line);
  margin-top: 0;
}

.faq-answer p {
  margin: 0;
  padding-top: 16px;
  font-size: 15px;
  color: var(--color-ink-soft);
  line-height: 1.8;
}

/* ---------- 图片的通用约束 ---------- */
figure img {
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius-md);
}

/* 首页 hero 图 */
.hero-image img {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

/* 课程卡配图 */
.course-media img {
  aspect-ratio: 4 / 3;
  height: 100%;
  object-fit: cover;
}

/* 导师卡配图 */
.teacher-figure img {
  aspect-ratio: 1 / 1;
  object-fit: cover;
}

/* 首页导师预览配图 */
.teacher-preview-grid img {
  aspect-ratio: 16 / 10;
  object-fit: cover;
  border-radius: var(--radius-md);
  margin-bottom: 14px;
}

/* 帮助页配图 */
.help-figure img {
  aspect-ratio: 21 / 9;
  object-fit: cover;
  border-radius: var(--radius-md);
}

/* 首页 overview 配图 */
.overview-figure img {
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: var(--radius-md);
}

/* FAQ 高亮区配图 */
.content-media-inline img {
  aspect-ratio: 21 / 8;
  object-fit: cover;
  border-radius: var(--radius-md);
}

/* 合作服务卡配图 */
.card-media img {
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border-radius: var(--radius-md);
}

/* 学习路径阶段配图 */
.stage-media figure img {
  aspect-ratio: 21 / 8;
  object-fit: cover;
  border-radius: var(--radius-md);
}

/* 关于页配图 */
.about-figure img {
  aspect-ratio: 21 / 9;
  object-fit: cover;
  border-radius: var(--radius-md);
}

/* --------------------------------------------------------------------------
   4. Pages —— 首页与各内页的模块样式
   -------------------------------------------------------------------------- */

/* ========== 首页 ========== */
.home-main {
  background-color: var(--color-bg);
}

/* 首屏双通道区 */
.hero-dual-channel {
  background-color: var(--color-bg-soft);
  border-bottom: 1px solid var(--color-line);
  padding: 48px 0 56px;
}

.hero-content {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 var(--gutter);
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}

.hero-text h1 {
  font-size: 34px;
  line-height: 1.3;
  margin-bottom: 16px;
}

.hero-text h1 span {
  color: var(--color-accent);
}

.hero-text > p {
  font-size: 16px;
  color: var(--color-ink-soft);
  margin-bottom: 24px;
  max-width: 520px;
}

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

.hero-figure {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.hero-image {
  margin: 0;
}

.hero-quick-links {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.quick-card {
  display: flex;
  align-items: center;
  gap: 12px;
  background-color: #fff;
  border: 1px solid var(--color-line-soft);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  transition: box-shadow 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.quick-card:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-sm);
  transform: translateY(-2px);
}

.quick-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background-color: rgba(74, 124, 113, 0.12);
  color: var(--color-teal);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
}

.quick-icon::before {
  content: "→";
  font-weight: 700;
}

.quick-text {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-ink);
  line-height: 1.4;
}

.quick-text small {
  display: block;
  font-size: 12px;
  font-weight: 400;
  color: var(--color-ink-soft);
}

/* 首页主体内容区 */
.home-content {
  padding: 0 0 16px;
}

/* 首页各区块通用 */
.home-content section {
  margin-bottom: var(--space-section);
}

.home-content section:last-child {
  margin-bottom: 48px;
}

/* overview 介绍 */
.overview-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 40px;
  align-items: center;
}

.overview-text p {
  font-size: 16px;
  margin-bottom: 1em;
  color: var(--color-ink-soft);
}

.overview-text p:first-child {
  font-size: 17px;
  color: var(--color-ink);
  font-weight: 500;
}

.overview-figure {
  margin: 0;
}

/* 课程方向预览 */
.course-direction-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.direction-card {
  background-color: var(--color-card);
  border: 1px solid var(--color-line-soft);
  border-radius: var(--radius-md);
  padding: 24px 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.direction-icon {
  width: 44px;
  height: 44px;
  background-color: rgba(226, 112, 58, 0.12);
  color: var(--color-accent);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 6px;
}

.direction-icon::before {
  content: "✎";
  font-size: 20px;
}

.direction-card h3 {
  font-size: 17px;
}

.direction-card p {
  font-size: 14px;
  color: var(--color-ink-soft);
  line-height: 1.7;
  margin: 0;
  flex-grow: 1;
}

.direction-card .card-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-teal);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.direction-card .card-link::after {
  content: "→";
  transition: transform 0.2s ease;
}

.direction-card .card-link:hover::after {
  transform: translateX(4px);
}

/* 学习路径预览 */
.path-stages-preview {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.stage-node {
  background-color: var(--color-card);
  border: 1px solid var(--color-line-soft);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  position: relative;
  border-top: 4px solid var(--color-teal);
}

.stage-node:nth-child(2) {
  border-top-color: var(--color-gold);
}

.stage-node:nth-child(3) {
  border-top-color: var(--color-accent);
}

.stage-tag {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  background-color: rgba(74, 124, 113, 0.1);
  color: var(--color-teal);
  padding: 4px 10px;
  border-radius: 999px;
  margin-bottom: 12px;
}

.stage-node:nth-child(2) .stage-tag {
  background-color: rgba(233, 180, 76, 0.15);
  color: #b3841d;
}

.stage-node:nth-child(3) .stage-tag {
  background-color: rgba(226, 112, 58, 0.1);
  color: var(--color-accent);
}

.stage-node h3 {
  font-size: 18px;
  margin-bottom: 8px;
}

.stage-node p {
  font-size: 14px;
  color: var(--color-ink-soft);
  margin: 0;
  line-height: 1.7;
}

/* 导师预览 */
.teacher-preview-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.teacher-preview-grid .teacher-card {
  background-color: var(--color-card);
  border: 1px solid var(--color-line-soft);
  border-radius: var(--radius-md);
  padding: 20px;
}

.teacher-preview-grid .teacher-card h3 {
  font-size: 17px;
  margin-bottom: 6px;
}

.teacher-preview-grid .teacher-card p {
  font-size: 14px;
  color: var(--color-ink-soft);
  margin: 0;
  line-height: 1.7;
}

/* 企业服务预览 */
.coop-service-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.coop-service-item {
  background-color: var(--color-card);
  border: 1px solid var(--color-line-soft);
  border-radius: var(--radius-md);
  padding: 24px;
}

.coop-service-item h3 {
  font-size: 17px;
  margin-bottom: 10px;
  position: relative;
  padding-left: 18px;
}

.coop-service-item h3::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 8px;
  height: 8px;
  background-color: var(--color-accent);
  border-radius: 2px;
  transform: rotate(45deg);
}

.coop-service-item p {
  font-size: 14px;
  color: var(--color-ink-soft);
  margin: 0;
  line-height: 1.7;
}

/* FAQ 预览 */
.faq-preview-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.faq-mini-card {
  background-color: var(--color-card);
  border: 1px solid var(--color-line-soft);
  border-radius: var(--radius-md);
  padding: 24px;
}

.faq-mini-card h3 {
  font-size: 16px;
  margin-bottom: 8px;
}

.faq-mini-card h3::before {
  content: "Q. ";
  color: var(--color-accent);
}

.faq-mini-card p {
  font-size: 14px;
  color: var(--color-ink-soft);
  margin: 0;
  line-height: 1.7;
}

/* 支持入口双卡 */
.support-entry-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.support-card {
  background-color: var(--color-teal);
  border-radius: var(--radius-md);
  padding: 28px 32px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: background-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.support-card:last-child {
  background-color: var(--color-accent);
}

.support-card:hover {
  background-color: var(--color-teal-dark);
  color: #fff;
}

.support-card:last-child:hover {
  background-color: var(--color-accent-dark);
}

.support-card h3 {
  color: #fff;
  font-size: 19px;
  margin: 0;
}

.support-card p {
  color: rgba(255, 255, 255, 0.85);
  font-size: 14px;
  margin: 0;
  line-height: 1.6;
}

/* 首页关于入口 */
.about-entry-inline {
  margin-top: 12px;
  text-align: center;
}

.about-entry-inline a {
  font-size: 15px;
  font-weight: 500;
  color: var(--color-ink-soft);
  border-bottom: 1px dashed var(--color-ink-soft);
  padding-bottom: 2px;
}

.about-entry-inline a:hover {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

/* ========== 课程体系页 ========== */
.course-layout {
  margin-bottom: 16px;
}

.course-content {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 56px;
}

.course-category {
  scroll-margin-top: calc(var(--header-h) + 20px);
}

.course-category > h2 {
  font-size: 26px;
  margin-bottom: 8px;
  position: relative;
  padding-bottom: 12px;
}

.course-category > h2::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 36px;
  height: 3px;
  background-color: var(--color-accent);
  border-radius: 2px;
}

.category-desc {
  font-size: 15px;
  color: var(--color-ink-soft);
  margin-bottom: 24px;
}

.course-card {
  display: grid;
  grid-template-columns: 1.3fr 0.7fr;
  gap: 24px;
  background-color: var(--color-card);
  border: 1px solid var(--color-line-soft);
  border-radius: var(--radius-md);
  padding: 24px;
  margin-bottom: 20px;
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.course-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}

.course-text h3 {
  font-size: 19px;
  margin-bottom: 8px;
}

.course-audience {
  display: inline-block;
  font-size: 13px;
  background-color: rgba(74, 124, 113, 0.1);
  color: var(--color-teal);
  padding: 3px 12px;
  border-radius: 999px;
  margin-bottom: 12px;
  font-weight: 500;
}

.course-text p {
  font-size: 15px;
  color: var(--color-ink-soft);
  line-height: 1.75;
  margin-bottom: 10px;
}

.course-goal {
  font-size: 14px;
  color: var(--color-ink);
  border-left: 3px solid var(--color-gold);
  padding-left: 12px;
  margin-top: 12px;
  font-weight: 500;
}

.course-media {
  margin: 0;
}

.course-media figcaption {
  font-size: 13px;
}

/* 学习起点建议 */
.starting-advice {
  background-color: var(--color-bg-soft);
  border: 1px solid var(--color-line-soft);
  border-radius: var(--radius-md);
  padding: 32px;
  scroll-margin-top: calc(var(--header-h) + 20px);
}

.starting-advice h2 {
  font-size: 22px;
  margin-bottom: 8px;
}

.starting-advice > p {
  font-size: 15px;
  color: var(--color-ink-soft);
  margin-bottom: 20px;
}

.advice-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.advice-card {
  background-color: var(--color-card);
  border: 1px solid var(--color-line-soft);
  border-radius: var(--radius-md);
  padding: 20px;
}

.advice-card h3 {
  font-size: 15px;
  margin-bottom: 8px;
  color: var(--color-accent);
}

.advice-card h3::before {
  content: "01";
  font-size: 13px;
  color: var(--color-teal);
  margin-right: 8px;
  font-variant-numeric: tabular-nums;
}

.advice-card:nth-child(2) h3::before {
  content: "02";
}

.advice-card:nth-child(3) h3::before {
  content: "03";
}

.advice-card p {
  font-size: 14px;
  color: var(--color-ink-soft);
  margin: 0;
  line-height: 1.7;
}

.advice-more {
  margin-top: 20px;
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.advice-more a {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-teal);
  border-bottom: 1px dashed var(--color-teal);
  padding-bottom: 2px;
}

.advice-more a:hover {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

/* ========== 学习路径页 ========== */
.stage-overview {
  max-width: var(--container-w);
  margin: 0 auto 48px;
  padding: 0 var(--gutter);
}

.stage-overview .section-title {
  font-size: 24px;
  margin-bottom: 20px;
}

.stage-overview-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.stage-card {
  background-color: var(--color-card);
  border: 1px solid var(--color-line-soft);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  border-top: 4px solid var(--color-teal);
}

.stage-card.stage-method {
  border-top-color: var(--color-gold);
}

.stage-card.stage-production {
  border-top-color: var(--color-accent);
}

.stage-card h3 {
  font-size: 18px;
  margin-bottom: 8px;
}

.stage-card p {
  font-size: 14px;
  color: var(--color-ink-soft);
  line-height: 1.7;
  margin-bottom: 12px;
}

.stage-output {
  font-size: 13px;
  font-weight: 500;
  color: var(--color-teal);
  background-color: rgba(74, 124, 113, 0.08);
  display: inline-block;
  padding: 4px 12px;
  border-radius: 999px;
}

.stage-method .stage-output {
  color: #b3841d;
  background-color: rgba(233, 180, 76, 0.12);
}

.stage-production .stage-output {
  color: var(--color-accent);
  background-color: rgba(226, 112, 58, 0.1);
}

/* 学习路径长页 */
.roadmap {
  display: flex;
  flex-direction: column;
  gap: 48px;
}

.roadmap-stage {
  background-color: var(--color-bg-soft);
  border: 1px solid var(--color-line-soft);
  border-radius: var(--radius-md);
  padding: 32px;
  scroll-margin-top: calc(var(--header-h) + 20px);
}

.roadmap-stage h2 {
  font-size: 24px;
  margin-bottom: 10px;
  position: relative;
  padding-left: 16px;
}

.roadmap-stage h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  width: 6px;
  height: 24px;
  background-color: var(--color-teal);
  border-radius: 3px;
}

.roadmap-stage.stage-block-2 h2::before {
  background-color: var(--color-gold);
}

.roadmap-stage.stage-block-3 h2::before {
  background-color: var(--color-accent);
}

.roadmap-stage > p {
  font-size: 15px;
  color: var(--color-ink-soft);
  margin-bottom: 20px;
}

.stage-media {
  margin: 20px 0 24px;
}

.stage-media figure {
  margin: 0;
}

.roadmap-stage h3 {
  font-size: 17px;
  margin: 20px 0 10px;
  color: var(--color-ink);
}

.roadmap-stage ul {
  list-style: none;
  margin: 0 0 8px;
}

.roadmap-stage ul li {
  position: relative;
  padding-left: 20px;
  margin-bottom: 8px;
  font-size: 15px;
  color: var(--color-ink-soft);
  line-height: 1.7;
}

.roadmap-stage ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 7px;
  height: 7px;
  background-color: var(--color-teal);
  border-radius: 50%;
}

.stage-block-2 ul li::before {
  background-color: var(--color-gold);
}

.stage-block-3 ul li::before {
  background-color: var(--color-accent);
}

.roadmap-stage p a {
  font-weight: 500;
  color: var(--color-teal);
  border-bottom: 1px dashed var(--color-teal);
  padding-bottom: 1px;
}

.roadmap-stage p a:hover {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

/* 侧栏自测 */
.stage-aside {
  background-color: var(--color-bg-soft);
  border: 1px solid var(--color-line-soft);
  border-radius: var(--radius-md);
  padding: 24px;
}

.stage-aside h2 {
  font-size: 18px;
  margin-bottom: 10px;
}

.stage-aside > p {
  font-size: 14px;
  color: var(--color-ink-soft);
  margin-bottom: 16px;
}

.stage-aside ul {
  margin-bottom: 16px;
}

.stage-aside ul li {
  padding: 12px 0;
  border-bottom: 1px dashed var(--color-line);
  font-size: 14px;
  color: var(--color-ink-soft);
  line-height: 1.7;
}

.stage-aside ul li:last-child {
  border-bottom: none;
}

.stage-aside ul li strong {
  display: block;
  color: var(--color-ink);
  font-size: 14px;
  margin-bottom: 4px;
}

.stage-aside > p a {
  display: block;
  text-align: center;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-accent);
  border: 1px solid var(--color-accent);
  border-radius: var(--radius-sm);
  padding: 8px 16px;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.stage-aside > p a:hover {
  background-color: var(--color-accent);
  color: #fff;
}

/* ========== 导师团队页 ========== */
.director-intro {
  max-width: var(--container-w);
  margin: 0 auto 40px;
  padding: 0 var(--gutter);
}

.director-intro h2 {
  font-size: 22px;
  margin-bottom: 12px;
}

.director-intro p {
  font-size: 15px;
  color: var(--color-ink-soft);
  max-width: 760px;
}

.group-main,
.group-visual {
  max-width: var(--container-w);
  margin: 0 auto 56px;
  padding: 0 var(--gutter);
}

.group-main > h2,
.group-visual > h2 {
  font-size: 22px;
  margin-bottom: 24px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-line);
  position: relative;
}

.group-main > h2::after,
.group-visual > h2::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 36px;
  height: 2px;
  background-color: var(--color-accent);
}

.group-main .teacher-card,
.group-visual .teacher-card {
  display: grid;
  grid-template-columns: 240px minmax(0, 1fr);
  gap: 28px;
  background-color: var(--color-card);
  border: 1px solid var(--color-line-soft);
  border-radius: var(--radius-md);
  padding: 24px;
  margin-bottom: 24px;
  align-items: center;
}

.teacher-media {
  margin: 0;
}

.teacher-figure {
  margin: 0;
}

.teacher-info h3 {
  font-size: 20px;
  margin-bottom: 8px;
}

.teacher-info p {
  font-size: 15px;
  color: var(--color-ink-soft);
  line-height: 1.75;
  margin-bottom: 10px;
}

.teacher-info a {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-teal);
  border-bottom: 1px dashed var(--color-teal);
  padding-bottom: 2px;
}

.teacher-info a:hover {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

/* 导师匹配建议 */
.teacher-match {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 40px var(--gutter) 0;
}

.teacher-match > h2 {
  font-size: 22px;
  margin-bottom: 16px;
}

.match-suggestions {
  background-color: var(--color-bg-soft);
  border: 1px solid var(--color-line-soft);
  border-radius: var(--radius-md);
  padding: 28px 32px;
}

.match-suggestions > p {
  font-size: 15px;
  color: var(--color-ink-soft);
  margin-bottom: 14px;
}

.match-suggestions ul {
  margin-bottom: 16px;
}

.match-suggestions ul li {
  padding: 10px 0;
  border-bottom: 1px dashed var(--color-line);
  font-size: 15px;
  color: var(--color-ink-soft);
  line-height: 1.7;
}

.match-suggestions ul li:last-child {
  border-bottom: none;
}

.match-suggestions ul li strong {
  color: var(--color-ink);
  margin-right: 6px;
}

.match-suggestions > p:last-child a {
  display: inline-block;
  margin-right: 16px;
  margin-top: 8px;
  font-size: 15px;
  font-weight: 500;
  color: #fff;
  background-color: var(--color-accent);
  padding: 10px 24px;
  border-radius: var(--radius-sm);
  transition: background-color 0.2s ease;
}

.match-suggestions > p:last-child a:hover {
  background-color: var(--color-accent-dark);
}

/* ========== 学习帮助页 ========== */
.help-layout {
  margin-bottom: 16px;
}

.help-toc {
  background-color: var(--color-bg-soft);
  border: 1px solid var(--color-line-soft);
  border-radius: var(--radius-md);
  padding: 20px;
}

.help-content {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 48px;
}

.help-section {
  scroll-margin-top: calc(var(--header-h) + 20px);
}

.help-section > h2 {
  font-size: 24px;
  margin-bottom: 8px;
  position: relative;
  padding-bottom: 12px;
}

.help-section > h2::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 36px;
  height: 3px;
  background-color: var(--color-accent);
  border-radius: 2px;
}

.section-lead {
  font-size: 15px;
  color: var(--color-ink-soft);
  margin-bottom: 20px;
}

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

.prep-columns {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 8px;
}

.prep-block {
  background-color: var(--color-bg-soft);
  border: 1px solid var(--color-line-soft);
  border-radius: var(--radius-md);
  padding: 20px;
}

.prep-block h3 {
  font-size: 16px;
  margin-bottom: 10px;
  color: var(--color-teal);
}

.prep-block ul li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  color: var(--color-ink-soft);
  line-height: 1.7;
  margin-bottom: 6px;
}

.prep-block ul li::before {
  content: "·";
  position: absolute;
  left: 2px;
  font-size: 18px;
  color: var(--color-accent);
  line-height: 1.4;
}

/* 作业与课堂公约 */
.homework-rules {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.rule-item {
  background-color: var(--color-bg-soft);
  border: 1px solid var(--color-line-soft);
  border-radius: var(--radius-md);
  padding: 20px;
}

.rule-item h3 {
  font-size: 16px;
  margin-bottom: 8px;
}

.rule-item h3::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  background-color: var(--color-accent);
  border-radius: 50%;
  margin-right: 8px;
  vertical-align: middle;
}

.rule-item p {
  font-size: 14px;
  color: var(--color-ink-soft);
  line-height: 1.7;
  margin: 0;
}

/* 答疑反馈 */
.feedback-channels {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.channel-card {
  background-color: var(--color-bg-soft);
  border: 1px solid var(--color-line-soft);
  border-radius: var(--radius-md);
  padding: 24px;
}

.channel-card h3 {
  font-size: 17px;
  margin-bottom: 8px;
  color: var(--color-teal);
}

.channel-card p {
  font-size: 14px;
  color: var(--color-ink-soft);
  line-height: 1.7;
  margin-bottom: 8px;
}

.more-link {
  margin-top: 16px;
}

.more-link a {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-teal);
  border-bottom: 1px dashed var(--color-teal);
  padding-bottom: 2px;
  margin-right: 16px;
}

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

/* ========== 常见问题页 ========== */
.faq-highlight {
  max-width: var(--container-w);
  margin: 0 auto 48px;
  padding: 0 var(--gutter);
}

.faq-highlight > h2 {
  font-size: 22px;
  margin-bottom: 20px;
}

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

.highlight-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.highlight-item {
  background-color: var(--color-card);
  border: 1px solid var(--color-line-soft);
  border-radius: var(--radius-md);
  padding: 24px;
}

.highlight-item h3 {
  font-size: 16px;
  margin-bottom: 8px;
}

.highlight-item p {
  font-size: 14px;
  color: var(--color-ink-soft);
  line-height: 1.7;
  margin-bottom: 12px;
}

.highlight-item a {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-accent);
}

.highlight-item a::after {
  content: " →";
}

/* FAQ 分组 */
.faq-group {
  max-width: var(--container-w);
  margin: 0 auto 40px;
  padding: 0 var(--gutter);
}

.faq-group > h2 {
  font-size: 22px;
  margin-bottom: 16px;
  position: relative;
  padding-bottom: 12px;
}

.faq-group > h2::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 32px;
  height: 3px;
  background-color: var(--color-accent);
  border-radius: 2px;
}

/* 未解决问题入口 */
.faq-more {
  max-width: var(--container-w);
  margin: 0 auto 24px;
  padding: 0 var(--gutter);
}

.faq-more > h2 {
  font-size: 22px;
  margin-bottom: 8px;
}

.faq-more > p {
  font-size: 15px;
  color: var(--color-ink-soft);
  margin-bottom: 20px;
}

.more-links {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.more-card {
  background-color: var(--color-card);
  border: 1px solid var(--color-line-soft);
  border-radius: var(--radius-md);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.more-card-title {
  font-size: 17px;
  font-weight: 600;
  color: var(--color-ink);
}

.more-card span:last-child {
  font-size: 14px;
  color: var(--color-ink-soft);
  line-height: 1.6;
}

/* ========== 企业服务页 ========== */
.coop-content {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 56px;
}

.service-scope,
.process-steps,
.deliverables,
.prepare-list {
  scroll-margin-top: calc(var(--header-h) + 20px);
}

.service-scope > h2,
.process-steps > h2,
.deliverables > h2,
.prepare-list > h2 {
  font-size: 24px;
  margin-bottom: 10px;
  position: relative;
  padding-bottom: 12px;
}

.service-scope > h2::after,
.process-steps > h2::after,
.deliverables > h2::after,
.prepare-list > h2::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 36px;
  height: 3px;
  background-color: var(--color-accent);
  border-radius: 2px;
}

.service-scope > p,
.process-steps > p,
.deliverables > p,
.prepare-list > p {
  font-size: 15px;
  color: var(--color-ink-soft);
  margin-bottom: 20px;
}

.service-card {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 24px;
  background-color: var(--color-card);
  border: 1px solid var(--color-line-soft);
  border-radius: var(--radius-md);
  padding: 24px;
  margin-bottom: 20px;
  align-items: center;
}

.card-text h3 {
  font-size: 19px;
  margin-bottom: 8px;
}

.card-text p {
  font-size: 15px;
  color: var(--color-ink-soft);
  line-height: 1.75;
  margin: 0;
}

.card-media {
  margin: 0;
}

/* 合作流程 */
.process-steps .step-list {
  counter-reset: step-counter;
}

.process-steps .step-item {
  counter-increment: step-counter;
}

.process-steps .step-num::before {
  content: counter(step-counter);
}

.step-body h3 {
  font-size: 16px;
  margin-bottom: 6px;
}

.step-body p {
  font-size: 14px;
  color: var(--color-ink-soft);
  line-height: 1.7;
  margin: 0;
}

/* 交付标准 */
.deliverable-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.deliverable-list li {
  background-color: var(--color-bg-soft);
  border: 1px solid var(--color-line-soft);
  border-radius: var(--radius-md);
  padding: 18px 20px;
  font-size: 14px;
  color: var(--color-ink-soft);
  line-height: 1.7;
  position: relative;
  padding-left: 44px;
}

.deliverable-list li::before {
  content: "✓";
  position: absolute;
  left: 16px;
  top: 18px;
  width: 20px;
  height: 20px;
  background-color: var(--color-teal);
  color: #fff;
  border-radius: 50%;
  font-size: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.deliverable-list li strong {
  display: block;
  color: var(--color-ink);
  font-size: 15px;
  margin-bottom: 4px;
}

/* 准备资料 */
.prepare-group {
  background-color: var(--color-bg-soft);
  border: 1px solid var(--color-line-soft);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  margin-bottom: 12px;
}

.prepare-group h3 {
  font-size: 16px;
  margin-bottom: 6px;
  color: var(--color-teal);
}

.prepare-group p {
  font-size: 14px;
  color: var(--color-ink-soft);
  line-height: 1.7;
  margin: 0;
}

/* 合作意向 CTA */
.coop-cta {
  background-color: var(--color-bg-soft);
  border: 1px solid var(--color-line-soft);
  border-radius: var(--radius-md);
  padding: 32px;
  text-align: center;
}

.coop-cta h2 {
  font-size: 22px;
  margin-bottom: 8px;
}

.coop-cta > p {
  font-size: 15px;
  color: var(--color-ink-soft);
  max-width: 600px;
  margin: 0 auto 20px;
}

.cta-links {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 16px;
}

.cta-link {
  display: inline-block;
  font-size: 15px;
  font-weight: 500;
  color: #fff;
  background-color: var(--color-accent);
  padding: 10px 24px;
  border-radius: var(--radius-sm);
  transition: background-color 0.2s ease;
}

.cta-link:hover {
  background-color: var(--color-accent-dark);
  color: #fff;
}

.cta-link:last-child {
  background-color: transparent;
  color: var(--color-teal);
  border: 1px solid var(--color-teal);
}

.cta-link:last-child:hover {
  background-color: var(--color-teal);
  color: #fff;
}

.contact-note {
  font-size: 13px;
  color: var(--color-ink-soft);
  margin-top: 16px !important;
  opacity: 0.75;
}

/* ========== 关于我们页 ========== */
.about-story {
  max-width: var(--container-w);
  margin: 0 auto 40px;
  padding: 0 var(--gutter);
}

.about-story h2 {
  font-size: 24px;
  margin-bottom: 16px;
}

.about-story p {
  font-size: 16px;
  color: var(--color-ink-soft);
  margin-bottom: 1em;
  max-width: 780px;
}

.about-motto {
  max-width: var(--container-w);
  margin: 0 auto 48px;
  padding: 0 var(--gutter);
}

.about-motto p {
  font-size: 24px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--color-ink);
  border-left: 4px solid var(--color-accent);
  padding: 20px 0 20px 24px;
  background-color: var(--color-bg-soft);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  font-style: normal;
}

/* 事实面板 */
.about-facts {
  max-width: var(--container-w);
  margin: 0 auto 48px;
  padding: 0 var(--gutter);
}

.about-facts dl {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.fact-item {
  background-color: var(--color-card);
  border: 1px solid var(--color-line-soft);
  border-radius: var(--radius-md);
  padding: 20px 24px;
}

.fact-item dt {
  font-size: 13px;
  color: var(--color-ink-soft);
  margin-bottom: 6px;
  font-weight: 400;
}

.fact-item dd {
  font-size: 17px;
  font-weight: 600;
  color: var(--color-ink);
  margin: 0;
}

/* 生态连接 */
.about-ecosystem {
  max-width: var(--container-w);
  margin: 0 auto 56px;
  padding: 0 var(--gutter);
}

.about-ecosystem > h2 {
  font-size: 24px;
  margin-bottom: 20px;
}

.ecosystem-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.ecosystem-card {
  background-color: var(--color-bg-soft);
  border: 1px solid var(--color-line-soft);
  border-radius: var(--radius-md);
  padding: 24px;
}

.ecosystem-card h3 {
  font-size: 17px;
  margin-bottom: 10px;
  color: var(--color-teal);
}

.ecosystem-card p {
  font-size: 14px;
  color: var(--color-ink-soft);
  line-height: 1.7;
  margin-bottom: 10px;
}

.ecosystem-card p:last-child {
  margin-bottom: 0;
}

/* 教学实践 */
.about-practice {
  max-width: var(--container-w);
  margin: 0 auto 48px;
  padding: 0 var(--gutter);
}

.about-practice h2 {
  font-size: 24px;
  margin-bottom: 16px;
}

.about-practice p {
  font-size: 16px;
  color: var(--color-ink-soft);
  margin-bottom: 1em;
  max-width: 780px;
}

/* 关于页配图 */
.about-image-note {
  max-width: var(--container-w);
  margin: 0 auto 56px;
  padding: 0 var(--gutter);
}

/* ========== 404 页 ========== */
.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 80px var(--gutter);
  background-color: var(--color-bg);
}

.error-panel {
  text-align: center;
  max-width: 560px;
  padding: 48px;
  background-color: var(--color-card);
  border: 1px solid var(--color-line-soft);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.error-code {
  font-size: 72px;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1;
  margin-bottom: 16px;
  font-variant-numeric: tabular-nums;
}

.error-panel h1 {
  font-size: 26px;
  margin-bottom: 12px;
}

.error-desc {
  font-size: 15px;
  color: var(--color-ink-soft);
  margin-bottom: 24px;
}

.error-home-btn {
  display: inline-block;
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  background-color: var(--color-accent);
  padding: 12px 32px;
  border-radius: var(--radius-md);
  transition: background-color 0.2s ease;
}

.error-home-btn:hover {
  background-color: var(--color-accent-dark);
  color: #fff;
}

/* --------------------------------------------------------------------------
   5. Responsive —— 响应式断点（1024px / 768px / 480px）
   -------------------------------------------------------------------------- */

/* ---------- 1024px 以下 ---------- */
@media (max-width: 1024px) {
  :root {
    --space-section: 56px;
  }

  .header-inner {
    gap: 16px;
  }

  .nav-list li a {
    padding: 8px 10px;
    font-size: 14px;
  }

  .course-direction-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .process-steps .step-list {
    grid-template-columns: repeat(2, 1fr);
  }

  .ecosystem-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .about-facts dl {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-inner {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}

/* ---------- 768px 以下（移动端） ---------- */
@media (max-width: 768px) {
  :root {
    --header-h: 60px;
    --space-section: 44px;
  }

  .header-inner {
    min-height: var(--header-h);
    position: relative;
  }

  .brand-name {
    font-size: 20px;
  }

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: static;
    order: 3;
  }

  .site-nav .nav-list {
    display: none;
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    background-color: var(--color-bg-soft);
    border-bottom: 1px solid var(--color-line);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px 0;
    box-shadow: 0 8px 24px rgba(45, 62, 64, 0.08);
    z-index: 99;
  }

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

  .site-nav .nav-list li a {
    padding: 12px 24px;
    border-radius: 0;
    border-left: 3px solid transparent;
  }

  .site-nav .nav-list li a.is-current {
    border-left-color: var(--color-accent);
    background-color: rgba(226, 112, 58, 0.06);
  }

  .header-cta {
    display: none;
  }

  /* 面包屑 */
  .breadcrumb {
    padding-top: 14px;
    font-size: 13px;
  }

  /* 页面标题 */
  .page-header {
    padding: 24px var(--gutter) 28px;
  }

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

  .page-description {
    font-size: 15px;
  }

  /* 侧栏布局全部改为单列 */
  .page-layout,
  .sidebar-left,
  .page-layout.sidebar-left,
  .learning-wrap {
    display: block;
  }

  .page-layout .sidebar,
  .sidebar-left > aside,
  .page-layout.sidebar-left .sidebar,
  .learning-wrap .stage-aside {
    position: static;
    margin-bottom: 24px;
  }

  .sidebar-left > aside,
  .page-layout.sidebar-left .sidebar {
    order: 2;
  }

  .sidebar-left > div,
  .page-layout.sidebar-left .coop-content {
    order: 1;
  }

  /* 首页移动端顺序：先正文后侧栏 */
  .home-main .page-layout {
    display: flex;
    flex-direction: column;
  }

  .home-main .page-layout .content {
    order: 1;
  }

  .home-main .page-layout .toc-sidebar {
    order: 2;
    margin-top: 8px;
  }

  /* 首页侧栏目录在移动端改为横向滚动 */
  .toc-sidebar .sidebar-nav .toc-list {
    display: flex;
    overflow-x: auto;
    gap: 8px;
    padding-bottom: 8px;
    -webkit-overflow-scrolling: touch;
  }

  .toc-sidebar .sidebar-nav .toc-list li {
    flex-shrink: 0;
    margin-bottom: 0;
  }

  .toc-sidebar .sidebar-nav .toc-list a {
    white-space: nowrap;
    padding: 6px 14px;
    border-left: none;
    background-color: var(--color-bg-soft);
    border: 1px solid var(--color-line-soft);
    border-radius: 999px;
    font-size: 13px;
  }

  .toc-sidebar .sidebar-title {
    font-size: 14px;
    margin-bottom: 10px;
  }

  /* 首页 hero */
  .hero-dual-channel {
    padding: 32px 0 40px;
  }

  .hero-content {
    grid-template-columns: 1fr;
    gap: 28px;
  }

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

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .hero-actions .btn {
    text-align: center;
  }

  .hero-figure {
    order: 2;
  }

  .hero-quick-links {
    grid-template-columns: 1fr 1fr;
  }

  /* 首页网格降列 */
  .overview-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .course-direction-grid {
    grid-template-columns: 1fr;
  }

  .path-stages-preview {
    grid-template-columns: 1fr;
  }

  .teacher-preview-grid {
    grid-template-columns: 1fr;
  }

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

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

  .support-entry-grid {
    grid-template-columns: 1fr;
  }

  /* 课程页 */
  .course-card {
    grid-template-columns: 1fr;
    padding: 20px;
  }

  .course-media {
    order: -1;
  }

  .course-media img {
    aspect-ratio: 16 / 9;
    max-height: 200px;
  }

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

  /* 学习路径页 */
  .stage-overview-grid {
    grid-template-columns: 1fr;
  }

  .roadmap-stage {
    padding: 24px 20px;
  }

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

  /* 导师页 */
  .group-main .teacher-card,
  .group-visual .teacher-card {
    grid-template-columns: 1fr;
    padding: 20px;
  }

  .teacher-media {
    max-width: 280px;
    margin: 0 auto;
  }

  /* 帮助页 */
  .prep-columns {
    grid-template-columns: 1fr;
  }

  .homework-rules {
    grid-template-columns: 1fr;
  }

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

  .help-content .step-item {
    padding: 16px;
    gap: 12px;
  }

  .help-content .step-number {
    width: 34px;
    height: 34px;
    font-size: 14px;
  }

  /* FAQ 页 */
  .highlight-grid {
    grid-template-columns: 1fr;
  }

  .more-links {
    grid-template-columns: 1fr;
  }

  .faq-item summary {
    padding: 16px;
    font-size: 15px;
  }

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

  /* 合作页 */
  .service-card {
    grid-template-columns: 1fr;
    padding: 20px;
  }

  .card-media {
    order: -1;
  }

  .card-media img {
    aspect-ratio: 16 / 9;
    max-height: 200px;
  }

  .process-steps .step-list {
    grid-template-columns: 1fr;
  }

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

  .cta-links {
    flex-direction: column;
    align-items: stretch;
  }

  .cta-link {
    text-align: center;
  }

  /* 关于页 */
  .ecosystem-grid {
    grid-template-columns: 1fr;
  }

  .about-facts dl {
    grid-template-columns: 1fr;
  }

  .about-motto p {
    font-size: 20px;
    padding: 16px 0 16px 18px;
  }

  /* 页脚 */
  .footer-inner {
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 40px var(--gutter) 24px;
  }

  .footer-bottom {
    flex-direction: column-reverse;
    gap: 12px;
    text-align: center;
  }

  /* 404 */
  .error-panel {
    padding: 32px 24px;
  }

  .error-code {
    font-size: 56px;
  }
}

/* ---------- 480px 以下 ---------- */
@media (max-width: 480px) {
  :root {
    --gutter: 16px;
  }

  h1 {
    font-size: 24px;
  }

  h2 {
    font-size: 21px;
  }

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

  .hero-quick-links {
    grid-template-columns: 1fr;
  }

  .quick-card {
    padding: 12px 14px;
  }

  .course-category > h2 {
    font-size: 21px;
  }

  .roadmap-stage h2 {
    font-size: 20px;
  }

  .roadmap-stage ul li {
    font-size: 14px;
  }

  .teacher-match {
    padding: 24px 16px 0;
  }

  .match-suggestions {
    padding: 20px;
  }

  .coop-cta {
    padding: 24px 20px;
  }

  .deliverable-list li {
    padding-left: 40px;
  }

  .deliverable-list li::before {
    left: 14px;
  }

  .about-motto p {
    font-size: 18px;
  }

  .stage-overview {
    margin-bottom: 32px;
  }

  .related-links {
    margin-top: 32px;
    padding: 16px;
  }
}

/* --------------------------------------------------------------------------
   6. Print —— 打印样式
   -------------------------------------------------------------------------- */
@media print {
  .site-header,
  .site-footer,
  .toc-sidebar,
  .category-nav,
  .help-toc,
  .service-index,
  .stage-aside,
  .related-links,
  .back-to-top,
  .breadcrumb,
  .page-header,
  .section-more,
  .more-link,
  .advice-more,
  .cta-links,
  .contact-note,
  .header-cta,
  .nav-toggle {
    display: none !important;
  }

  body {
    background-color: #fff;
    color: #000;
    font-size: 12pt;
  }

  .site-main {
    padding: 0;
  }

  .page-layout,
  .sidebar-left,
  .page-layout.sidebar-left,
  .learning-wrap {
    display: block;
  }

  .page-layout .sidebar,
  .sidebar-left > aside,
  .page-layout.sidebar-left .sidebar,
  .learning-wrap .stage-aside {
    display: none;
  }

  .course-card,
  .service-card,
  .group-main .teacher-card,
  .group-visual .teacher-card {
    grid-template-columns: 1fr;
    box-shadow: none;
    border: 1px solid #ddd;
    break-inside: avoid;
  }

  .course-media,
  .card-media,
  .teacher-media {
    max-width: 300px;
    margin: 0 auto 16px;
  }

  img {
    max-width: 100% !important;
  }

  a {
    color: #000;
    text-decoration: underline;
  }

  h1,
  h2,
  h3 {
    page-break-after: avoid;
  }
}