/* ==========================================================================
   泡芙视频 nic6.net · 全站样式
   分组：base / layout / components / pages / responsive
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. base
   -------------------------------------------------------------------------- */

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

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

body.site-body {
  margin: 0;
  padding: 0;
  background-color: #f4efe5;
  color: #1d2a33;
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  font-family: Georgia, "Songti SC", "SimSun", serif;
  color: #23485c;
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: 0;
}

p {
  margin: 0;
}

ul,
ol,
dl {
  margin: 0;
  padding: 0;
}

li {
  list-style: none;
}

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

a {
  color: #23485c;
  text-decoration: none;
  transition: color 0.18s ease, border-color 0.18s ease, background-color 0.18s ease;
}

a:hover {
  color: #a8461a;
}

a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 2px solid #a8461a;
  outline-offset: 2px;
}

strong {
  color: #163241;
  font-weight: 700;
}

button {
  font-family: inherit;
  cursor: pointer;
}

:target {
  scroll-margin-top: 96px;
}

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

.site-header {
  background-color: #fffdf8;
  border-bottom: 1px solid #d8cfc0;
  box-shadow: 0 1px 0 rgba(29, 42, 51, 0.04);
  position: relative;
  z-index: 20;
}

.header-inner {
  max-width: 1180px;
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px 32px;
}

.brand-block {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.brand-link {
  display: inline-block;
  color: #23485c;
}

.brand-link:hover {
  color: #a8461a;
}

.brand-name {
  display: inline-block;
  font-family: Georgia, "Songti SC", "SimSun", serif;
  font-size: 24px;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: 0;
}

.brand-slogan {
  font-size: 13px;
  line-height: 1.5;
  color: #5e6a70;
}

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

.nav-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 2px;
}

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

.nav-list a {
  display: block;
  padding: 8px 14px;
  font-size: 15px;
  line-height: 1.5;
  color: #23485c;
  border-radius: 4px;
  border-bottom: 2px solid transparent;
}

.nav-list a:hover {
  background-color: #f1c75b;
  color: #163241;
}

.nav-list a.is-current {
  color: #a8461a;
  border-bottom-color: #a8461a;
  font-weight: 700;
}

.nav-toggle {
  display: none;
  margin-left: auto;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid #d8cfc0;
  border-radius: 6px;
  background-color: #fffdf8;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
}

.nav-toggle:hover {
  border-color: #a8461a;
}

.nav-toggle-bar {
  display: block;
  width: 20px;
  height: 2px;
  background-color: #23485c;
  border-radius: 1px;
}

.site-main {
  display: block;
}

.inner-main {
  max-width: 1180px;
  margin: 0 auto;
  padding: 24px 24px 64px;
}

.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  font-size: 13px;
  line-height: 1.6;
  color: #5e6a70;
  margin-bottom: 20px;
}

.breadcrumb a {
  color: #23485c;
  text-decoration: underline;
  text-underline-offset: 2px;
}

.breadcrumb a:hover {
  color: #a8461a;
}

.breadcrumb-sep {
  color: #b8ae9d;
}

.breadcrumb-current {
  color: #5e6a70;
}

.breadcrumb-list {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  font-size: 13px;
  line-height: 1.6;
  color: #5e6a70;
}

.breadcrumb-list a {
  color: #23485c;
  text-decoration: underline;
  text-underline-offset: 2px;
}

.page-header {
  margin-bottom: 28px;
  padding-bottom: 20px;
  border-bottom: 1px solid #d8cfc0;
}

.page-title {
  font-size: 32px;
  line-height: 1.3;
  font-weight: 700;
  color: #23485c;
}

.site-footer {
  background-color: #163241;
  color: #d8cfc0;
  margin-top: 0;
}

.footer-inner {
  max-width: 1180px;
  margin: 0 auto;
  padding: 48px 24px 28px;
}

.footer-cols {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 32px;
  padding-bottom: 32px;
  border-bottom: 1px solid rgba(216, 207, 192, 0.22);
}

.footer-col h2 {
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 15px;
  font-weight: 700;
  color: #f1c75b;
  margin-bottom: 14px;
  letter-spacing: 0;
}

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

.footer-col a {
  display: inline-block;
  font-size: 14px;
  line-height: 1.6;
  color: #d8cfc0;
  padding: 2px 0;
}

.footer-col a:hover {
  color: #f1c75b;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.footer-bottom {
  padding-top: 24px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 32px;
}

.footer-brand {
  font-family: Georgia, "Songti SC", "SimSun", serif;
  font-size: 16px;
  color: #fffdf8;
  font-weight: 700;
}

.footer-scope {
  font-size: 13px;
  line-height: 1.6;
  color: #a9b5bb;
  max-width: 720px;
}

/* --------------------------------------------------------------------------
   3. components · 通用
   -------------------------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 10px 22px;
  font-size: 15px;
  font-weight: 700;
  line-height: 1.4;
  border-radius: 6px;
  border: 1px solid transparent;
  text-align: center;
}

.btn-primary {
  background-color: #163241;
  color: #fffdf8;
  border-color: #163241;
}

.btn-primary:hover {
  background-color: #a8461a;
  border-color: #a8461a;
  color: #fffdf8;
}

.btn-ghost {
  background-color: transparent;
  color: #23485c;
  border-color: #23485c;
}

.btn-ghost:hover {
  background-color: #f1c75b;
  border-color: #f1c75b;
  color: #163241;
}

.section-inner {
  max-width: 1180px;
  margin: 0 auto;
  padding: 40px 24px;
}

.section-head {
  margin-bottom: 22px;
  max-width: 760px;
}

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

.section-desc {
  font-size: 15px;
  line-height: 1.75;
  color: #5e6a70;
}

.section-more {
  margin-top: 20px;
  font-size: 14px;
}

.section-more a {
  color: #a8461a;
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.section-more a:hover {
  color: #163241;
}

.section-tag,
.page-tag {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  color: #a8461a;
  background-color: #f1c75b;
  padding: 3px 10px;
  border-radius: 3px;
  margin-bottom: 12px;
  line-height: 1.6;
}

.section-label {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  color: #a8461a;
  letter-spacing: 0;
  margin-bottom: 10px;
}

.section-note {
  font-size: 13px;
  line-height: 1.7;
  color: #5e6a70;
  margin-bottom: 16px;
}

.section-intro {
  font-size: 15px;
  line-height: 1.75;
  color: #3f4a51;
  margin-bottom: 18px;
}

.page-lead {
  font-size: 16px;
  line-height: 1.8;
  color: #3f4a51;
  max-width: 820px;
}

.page-lead a {
  color: #a8461a;
  text-decoration: underline;
  text-underline-offset: 3px;
  font-weight: 700;
}

.page-lead a:hover {
  color: #163241;
}

/* 通用折叠问答 */
.faq-item {
  background-color: #fffdf8;
  border: 1px solid #d8cfc0;
  border-radius: 6px;
  margin-bottom: 10px;
  overflow: hidden;
}

.faq-item summary {
  display: block;
  padding: 14px 44px 14px 18px;
  font-size: 16px;
  font-weight: 700;
  color: #23485c;
  line-height: 1.55;
  cursor: pointer;
  position: relative;
  list-style: none;
}

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

.faq-item summary::after {
  content: "＋";
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 16px;
  color: #a8461a;
  font-weight: 700;
}

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

.faq-item summary:hover {
  background-color: #f9f3e6;
}

.faq-item > p {
  padding: 0 18px 16px;
  font-size: 15px;
  line-height: 1.8;
  color: #3f4a51;
}

.faq-body {
  padding: 0 18px 16px;
}

.faq-body p {
  font-size: 15px;
  line-height: 1.8;
  color: #3f4a51;
}

/* 图片容器通用约束 */
figure {
  margin: 0;
}

figcaption {
  font-size: 13px;
  line-height: 1.6;
  color: #5e6a70;
}

/* --------------------------------------------------------------------------
   4. pages · 首页
   -------------------------------------------------------------------------- */

.home-main {
  display: block;
}

/* 4.1 首屏 */
.hero {
  background-color: #fffdf8;
  border-bottom: 1px solid #d8cfc0;
}

.hero-inner {
  max-width: 1180px;
  margin: 0 auto;
  padding: 48px 24px;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  gap: 48px;
  align-items: center;
}

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

.hero-kicker {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  color: #a8461a;
  background-color: #f1c75b;
  padding: 4px 12px;
  border-radius: 3px;
  margin-bottom: 16px;
  line-height: 1.6;
}

.hero-copy h1 {
  font-size: 40px;
  line-height: 1.25;
  margin-bottom: 16px;
  color: #23485c;
}

.hero-lead {
  font-size: 17px;
  line-height: 1.8;
  color: #3f4a51;
  margin-bottom: 26px;
  max-width: 560px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 18px;
}

.hero-note {
  font-size: 13px;
  line-height: 1.7;
  color: #5e6a70;
  padding-left: 12px;
  border-left: 3px solid #d8cfc0;
}

.hero-figure {
  position: relative;
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid #d8cfc0;
  background-color: #f4efe5;
}

.hero-figure img {
  width: 100%;
  height: 360px;
  object-fit: cover;
}

.hero-figure figcaption {
  padding: 10px 14px;
  background-color: #163241;
  color: #d8cfc0;
}

/* 4.2 频道导航带 */
.channel-strip {
  background-color: #f4efe5;
  border-bottom: 1px solid #d8cfc0;
}

.channel-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.channel-tags li {
  display: block;
}

.channel-tags a {
  display: inline-block;
  padding: 8px 18px;
  font-size: 14px;
  font-weight: 700;
  color: #23485c;
  background-color: #fffdf8;
  border: 1px solid #d8cfc0;
  border-radius: 4px;
  line-height: 1.5;
}

.channel-tags a:hover {
  background-color: #f1c75b;
  border-color: #f1c75b;
  color: #163241;
}

/* 4.3 任务分流 */
.task-split {
  background-color: #fffdf8;
  border-bottom: 1px solid #d8cfc0;
}

.task-columns {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.task-item {
  padding: 22px;
  background-color: #f9f3e6;
  border: 1px solid #d8cfc0;
  border-left: 4px solid #23485c;
  border-radius: 6px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.task-item h3 {
  font-size: 18px;
  color: #23485c;
}

.task-item p {
  font-size: 15px;
  line-height: 1.75;
  color: #3f4a51;
  flex: 1;
}

.task-item a {
  font-size: 14px;
  font-weight: 700;
  color: #a8461a;
  text-decoration: underline;
  text-underline-offset: 3px;
  align-self: flex-start;
  padding: 4px 0;
}

.task-item a:hover {
  color: #163241;
}

/* 4.4 专题书架摘要 */
.topic-preview {
  background-color: #f4efe5;
  border-bottom: 1px solid #d8cfc0;
}

.topic-rows {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.topic-row {
  display: grid;
  grid-template-columns: 160px minmax(0, 1fr) 200px;
  gap: 20px;
  align-items: center;
  padding: 14px;
  background-color: #fffdf8;
  border: 1px solid #d8cfc0;
  border-radius: 6px;
}

.topic-row:hover {
  border-color: #a8461a;
}

.topic-row .topic-thumb {
  width: 160px;
  border-radius: 4px;
  overflow: hidden;
  background-color: #e8e0d1;
}

.topic-row .topic-thumb img {
  width: 100%;
  height: 100px;
  object-fit: cover;
}

.topic-row .topic-body {
  min-width: 0;
}

.topic-row .topic-body h3 {
  font-size: 18px;
  margin-bottom: 6px;
}

.topic-row .topic-body p {
  font-size: 14px;
  line-height: 1.75;
  color: #3f4a51;
}

.topic-row .topic-meta {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 8px;
  min-width: 0;
}

.topic-row .topic-channel {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  color: #163241;
  background-color: #f1c75b;
  padding: 2px 10px;
  border-radius: 3px;
  line-height: 1.6;
}

.topic-row .topic-meta a {
  font-size: 14px;
  font-weight: 700;
  color: #a8461a;
  text-decoration: underline;
  text-underline-offset: 3px;
  padding: 2px 0;
}

.topic-row .topic-meta a:hover {
  color: #163241;
}

/* 4.5 视频条目预览 */
.entry-preview {
  background-color: #fffdf8;
  border-bottom: 1px solid #d8cfc0;
}

.entry-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
  gap: 32px;
  align-items: start;
}

.entry-main {
  background-color: #f9f3e6;
  border: 1px solid #d8cfc0;
  border-radius: 8px;
  padding: 18px;
  min-width: 0;
}

.entry-cover {
  border-radius: 6px;
  overflow: hidden;
  margin-bottom: 16px;
  background-color: #e8e0d1;
}

.entry-cover img {
  width: 100%;
  height: 240px;
  object-fit: cover;
}

.entry-main h3 {
  font-size: 20px;
  margin-bottom: 14px;
}

.entry-fields {
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr);
  gap: 8px 14px;
  padding-top: 14px;
  border-top: 1px dashed #d8cfc0;
}

.entry-fields dt {
  font-size: 14px;
  font-weight: 700;
  color: #5e6a70;
  line-height: 1.7;
}

.entry-fields dd {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: #1d2a33;
  min-width: 0;
}

.entry-side {
  display: flex;
  flex-direction: column;
  gap: 20px;
  min-width: 0;
}

.entry-compact-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.entry-compact-list li {
  padding: 14px 16px;
  background-color: #f4efe5;
  border: 1px solid #d8cfc0;
  border-left: 3px solid #a8461a;
  border-radius: 4px;
  font-size: 14px;
  line-height: 1.75;
  color: #3f4a51;
}

.entry-field-note {
  padding: 18px;
  background-color: #fffdf8;
  border: 1px solid #d8cfc0;
  border-radius: 8px;
}

.entry-field-note h3 {
  font-size: 17px;
  margin-bottom: 12px;
}

.entry-field-note ul {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.entry-field-note li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.75;
  color: #3f4a51;
}

.entry-field-note li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 8px;
  height: 8px;
  background-color: #3f6b4f;
  border-radius: 2px;
}

/* 4.6 入口核验提示 */
.label-check {
  background-color: #f4efe5;
  border-bottom: 1px solid #d8cfc0;
}

.check-columns {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.check-item {
  padding: 22px;
  background-color: #fffdf8;
  border: 1px solid #d8cfc0;
  border-top: 4px solid #23485c;
  border-radius: 6px;
  min-width: 0;
}

.check-item h3 {
  font-size: 18px;
  margin-bottom: 10px;
}

.check-item p {
  font-size: 15px;
  line-height: 1.75;
  color: #3f4a51;
}

/* 4.7 常见问题 */
.faq {
  background-color: #fffdf8;
  border-bottom: 1px solid #d8cfc0;
}

.faq-list {
  max-width: 900px;
}

/* 4.8 维护摘要 */
.maintenance {
  background-color: #f4efe5;
}

.maintenance-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.maintenance-item {
  padding: 20px;
  background-color: #fffdf8;
  border: 1px solid #d8cfc0;
  border-radius: 6px;
  min-width: 0;
}

.maintenance-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  color: #3f6b4f;
  background-color: #e6efe7;
  border: 1px solid #c3d6c8;
  padding: 2px 10px;
  border-radius: 3px;
  margin-bottom: 10px;
  line-height: 1.6;
}

.maintenance-item h3 {
  font-size: 17px;
  margin-bottom: 8px;
}

.maintenance-item p {
  font-size: 14px;
  line-height: 1.75;
  color: #3f4a51;
}

/* --------------------------------------------------------------------------
   5. pages · 内页通用模块
   -------------------------------------------------------------------------- */

/* 5.1 频道矩阵 */
.page-intro {
  margin-bottom: 28px;
  max-width: 860px;
}

.summary-block {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
  gap: 32px;
  align-items: start;
  padding: 24px;
  background-color: #fffdf8;
  border: 1px solid #d8cfc0;
  border-radius: 8px;
  margin-bottom: 28px;
}

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

.summary-text h2 {
  font-size: 22px;
  margin-bottom: 14px;
}

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

.summary-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 15px;
  line-height: 1.75;
  color: #3f4a51;
}

.summary-mark {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 24px;
  height: 24px;
  margin-top: 2px;
  font-size: 12px;
  font-weight: 700;
  color: #fffdf8;
  background-color: #23485c;
  border-radius: 50%;
  line-height: 1;
}

.summary-mark--pass {
  background-color: #3f6b4f;
}

.summary-mark--check {
  background-color: #a8461a;
}

.summary-mark--stop {
  background-color: #8b2f1d;
}

.summary-figure {
  border-radius: 6px;
  overflow: hidden;
  border: 1px solid #d8cfc0;
  background-color: #e8e0d1;
}

.summary-figure img {
  width: 100%;
  height: 220px;
  object-fit: cover;
}

.summary-figure figcaption {
  padding: 10px 12px;
  background-color: #f9f3e6;
}

.channel-anchor {
  margin-bottom: 28px;
  padding: 14px 18px;
  background-color: #f9f3e6;
  border: 1px solid #d8cfc0;
  border-radius: 6px;
}

.channel-anchor ul {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 10px;
}

.channel-anchor a {
  display: inline-block;
  padding: 6px 14px;
  font-size: 14px;
  font-weight: 700;
  color: #23485c;
  background-color: #fffdf8;
  border: 1px solid #d8cfc0;
  border-radius: 4px;
  line-height: 1.5;
}

.channel-anchor a:hover {
  background-color: #f1c75b;
  border-color: #f1c75b;
  color: #163241;
}

.matrix-table-block {
  margin-bottom: 40px;
}

.matrix-table-block h2,
.channel-profiles h2,
.choose-tips h2,
.related-topics h2 {
  font-size: 24px;
  margin-bottom: 8px;
}

.matrix-table-block .section-note,
.channel-profiles .section-note,
.choose-tips .section-note,
.related-topics .section-note {
  margin-bottom: 16px;
}

.table-wrap {
  width: 100%;
  overflow-x: auto;
  border: 1px solid #d8cfc0;
  border-radius: 8px;
  background-color: #fffdf8;
}

.matrix-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  min-width: 720px;
}

.matrix-table caption {
  padding: 12px 16px;
  text-align: left;
  font-size: 13px;
  color: #5e6a70;
  background-color: #f9f3e6;
  border-bottom: 1px solid #d8cfc0;
}

.matrix-table thead th {
  padding: 12px 16px;
  text-align: left;
  font-size: 14px;
  font-weight: 700;
  color: #fffdf8;
  background-color: #23485c;
  border-bottom: 1px solid #163241;
  white-space: nowrap;
}

.matrix-table tbody th {
  padding: 12px 16px;
  text-align: left;
  font-weight: 700;
  color: #23485c;
  background-color: #f9f3e6;
  border-bottom: 1px solid #d8cfc0;
  white-space: nowrap;
}

.matrix-table tbody td {
  padding: 12px 16px;
  color: #3f4a51;
  border-bottom: 1px solid #ece4d6;
  line-height: 1.7;
}

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

.matrix-table tbody tr:hover th,
.matrix-table tbody tr:hover td {
  background-color: #fbf6ea;
}

.channel-profiles {
  margin-bottom: 40px;
}

.channel-profile {
  background-color: #fffdf8;
  border: 1px solid #d8cfc0;
  border-left: 4px solid #23485c;
  border-radius: 6px;
  padding: 20px 22px;
  margin-top: 14px;
}

.channel-profile h3 {
  font-size: 19px;
  margin-bottom: 12px;
}

.profile-fields {
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr);
  gap: 8px 16px;
}

.profile-fields dt {
  font-size: 14px;
  font-weight: 700;
  color: #5e6a70;
  line-height: 1.75;
}

.profile-fields dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: #1d2a33;
  min-width: 0;
}

.profile-fields dd a {
  color: #a8461a;
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.profile-fields dd a:hover {
  color: #163241;
}

.choose-tips {
  margin-bottom: 40px;
}

.choose-tips .tips-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  counter-reset: tips;
}

.choose-tips .tips-list li {
  position: relative;
  padding: 16px 18px 16px 56px;
  background-color: #fffdf8;
  border: 1px solid #d8cfc0;
  border-radius: 6px;
  counter-increment: tips;
}

.choose-tips .tips-list li::before {
  content: counter(tips);
  position: absolute;
  left: 16px;
  top: 16px;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
  color: #fffdf8;
  background-color: #a8461a;
  border-radius: 50%;
  line-height: 1;
}

.choose-tips .tips-list h3 {
  font-size: 17px;
  margin-bottom: 6px;
}

.choose-tips .tips-list p {
  font-size: 15px;
  line-height: 1.75;
  color: #3f4a51;
}

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

.related-topic-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-bottom: 16px;
}

.related-topic-list li {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 18px;
  background-color: #f9f3e6;
  border: 1px solid #d8cfc0;
  border-radius: 6px;
  min-width: 0;
}

.related-topic-list a {
  font-size: 16px;
  font-weight: 700;
  color: #23485c;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.related-topic-list a:hover {
  color: #a8461a;
}

.related-topic-list span {
  font-size: 14px;
  line-height: 1.7;
  color: #5e6a70;
}

.related-more {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  font-size: 14px;
}

.related-more a {
  color: #a8461a;
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 3px;
  padding: 4px 0;
}

.related-more a:hover {
  color: #163241;
}

/* 5.2 专题书架 */
.page-title-block {
  margin-bottom: 28px;
  max-width: 860px;
}

.page-layout {
  display: block;
}

.sidebar-left .page-layout,
.page-layout.sidebar-left {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  gap: 32px;
  align-items: start;
}

.topic-sidebar {
  position: sticky;
  top: 20px;
  padding: 20px;
  background-color: #fffdf8;
  border: 1px solid #d8cfc0;
  border-radius: 8px;
  min-width: 0;
}

.topic-sidebar h2 {
  font-size: 18px;
  margin-bottom: 8px;
}

.sidebar-note {
  font-size: 13px;
  line-height: 1.7;
  color: #5e6a70;
  margin-bottom: 14px;
}

.topic-nav-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.topic-nav-list a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 8px 12px;
  font-size: 14px;
  font-weight: 700;
  color: #23485c;
  background-color: #f9f3e6;
  border: 1px solid transparent;
  border-radius: 4px;
  line-height: 1.5;
}

.topic-nav-list a:hover {
  background-color: #f1c75b;
  border-color: #e0b64c;
  color: #163241;
}

.topic-nav-tag {
  font-size: 12px;
  font-weight: 400;
  color: #5e6a70;
}

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

.summary-panel {
  padding: 22px;
  background-color: #fffdf8;
  border: 1px solid #d8cfc0;
  border-radius: 8px;
  margin-bottom: 32px;
}

.summary-panel h2 {
  font-size: 22px;
  margin-bottom: 12px;
}

.summary-panel > p {
  font-size: 15px;
  line-height: 1.8;
  color: #3f4a51;
  margin-bottom: 16px;
}

.summary-marks {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.summary-marks li {
  display: inline-flex;
  align-items: center;
}

.mark-label {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  color: #163241;
  background-color: #f1c75b;
  padding: 4px 12px;
  border-radius: 3px;
  line-height: 1.6;
}

.topic-list-section {
  margin-bottom: 36px;
}

.topic-list-section h2 {
  font-size: 24px;
  margin-bottom: 16px;
}

.topic-item {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr);
  gap: 20px;
  align-items: start;
  padding: 16px;
  background-color: #fffdf8;
  border: 1px solid #d8cfc0;
  border-radius: 6px;
  margin-bottom: 14px;
}

.topic-item:hover {
  border-color: #a8461a;
}

.topic-item .topic-thumb {
  width: 180px;
  border-radius: 4px;
  overflow: hidden;
  background-color: #e8e0d1;
}

.topic-item .topic-thumb img {
  width: 100%;
  height: 120px;
  object-fit: cover;
}

.topic-item .topic-body h3 {
  font-size: 19px;
  margin-bottom: 8px;
}

.topic-item .topic-body p {
  font-size: 14px;
  line-height: 1.75;
  color: #3f4a51;
  margin-bottom: 4px;
}

.topic-item .topic-body .topic-channel {
  display: inline-block;
  margin-top: 6px;
  font-size: 12px;
  font-weight: 700;
  color: #163241;
  background-color: #f1c75b;
  padding: 2px 10px;
  border-radius: 3px;
  line-height: 1.6;
}

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

.usage-section h2 {
  font-size: 22px;
  margin-bottom: 14px;
}

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

.usage-list li {
  position: relative;
  padding: 12px 16px 12px 40px;
  background-color: #f9f3e6;
  border: 1px solid #d8cfc0;
  border-radius: 6px;
  font-size: 15px;
  line-height: 1.75;
  color: #3f4a51;
}

.usage-list li::before {
  content: "";
  position: absolute;
  left: 16px;
  top: 20px;
  width: 10px;
  height: 10px;
  background-color: #3f6b4f;
  border-radius: 2px;
}

.source-section {
  padding: 20px 22px;
  background-color: #f9f3e6;
  border: 1px solid #d8cfc0;
  border-left: 4px solid #a8461a;
  border-radius: 6px;
}

.source-section h2 {
  font-size: 20px;
  margin-bottom: 10px;
}

.source-section p {
  font-size: 15px;
  line-height: 1.8;
  color: #3f4a51;
}

.source-section p + p {
  margin-top: 10px;
}

.source-section a {
  color: #a8461a;
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.source-section a:hover {
  color: #163241;
}

/* 5.3 观看手册 */
.page-hero {
  margin-bottom: 28px;
  max-width: 860px;
}

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

.page-layout.layout-main-aside {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 32px;
  align-items: start;
}

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

.side-column {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.step-nav {
  padding: 18px 20px;
  background-color: #fffdf8;
  border: 1px solid #d8cfc0;
  border-radius: 8px;
  margin-bottom: 28px;
}

.step-nav h2 {
  font-size: 17px;
  margin-bottom: 12px;
}

.step-nav-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.step-nav-list li {
  flex: 1 1 0;
  min-width: 120px;
}

.step-nav-link {
  display: block;
  padding: 10px 14px;
  text-align: center;
  font-size: 15px;
  font-weight: 700;
  color: #23485c;
  background-color: #f9f3e6;
  border: 1px solid #d8cfc0;
  border-radius: 4px;
  line-height: 1.5;
}

.step-nav-link:hover {
  background-color: #f1c75b;
  border-color: #e0b64c;
  color: #163241;
}

.step-block {
  padding: 24px;
  background-color: #fffdf8;
  border: 1px solid #d8cfc0;
  border-radius: 8px;
  margin-bottom: 20px;
}

.step-block h2 {
  font-size: 22px;
  margin-bottom: 10px;
}

.step-intro {
  font-size: 15px;
  line-height: 1.8;
  color: #3f4a51;
  margin-bottom: 16px;
}

.step-intro a {
  color: #a8461a;
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.step-intro a:hover {
  color: #163241;
}

.step-block h3 {
  font-size: 17px;
  margin: 16px 0 10px;
}

.step-block h3:first-of-type {
  margin-top: 0;
}

.step-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding-left: 0;
}

.step-list li {
  position: relative;
  padding-left: 22px;
  font-size: 15px;
  line-height: 1.8;
  color: #3f4a51;
}

.step-list li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 11px;
  width: 7px;
  height: 7px;
  background-color: #23485c;
  border-radius: 50%;
}

.step-list li a {
  color: #a8461a;
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.step-list li a:hover {
  color: #163241;
}

.step-list-ordered {
  counter-reset: steporder;
  gap: 10px;
}

.step-list-ordered li {
  padding: 10px 14px 10px 44px;
  background-color: #f9f3e6;
  border: 1px solid #d8cfc0;
  border-radius: 6px;
  counter-increment: steporder;
}

.step-list-ordered li::before {
  content: counter(steporder);
  left: 12px;
  top: 12px;
  width: 22px;
  height: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 700;
  color: #fffdf8;
  background-color: #23485c;
  border-radius: 50%;
  line-height: 1;
}

.step-tip {
  margin-top: 14px;
  padding: 12px 16px;
  font-size: 14px;
  line-height: 1.75;
  color: #3f4a51;
  background-color: #fbf6ea;
  border-left: 3px solid #f1c75b;
  border-radius: 4px;
}

.step-tip a {
  color: #a8461a;
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.step-tip a:hover {
  color: #163241;
}

.example-panel {
  padding: 24px;
  background-color: #fffdf8;
  border: 1px solid #d8cfc0;
  border-radius: 8px;
  margin-bottom: 20px;
}

.example-panel h2 {
  font-size: 22px;
  margin-bottom: 16px;
}

.example-figure {
  border-radius: 6px;
  overflow: hidden;
  border: 1px solid #d8cfc0;
  background-color: #e8e0d1;
  margin-bottom: 14px;
}

.example-figure img {
  width: 100%;
  height: 260px;
  object-fit: cover;
}

.example-figure figcaption {
  padding: 10px 12px;
  background-color: #f9f3e6;
}

.example-body p {
  font-size: 15px;
  line-height: 1.8;
  color: #3f4a51;
}

.example-body p + p {
  margin-top: 10px;
}

.mistakes {
  padding: 24px;
  background-color: #fffdf8;
  border: 1px solid #d8cfc0;
  border-radius: 8px;
  margin-bottom: 20px;
}

.mistakes h2 {
  font-size: 22px;
  margin-bottom: 16px;
}

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

.mistake-list li {
  padding: 14px 16px;
  background-color: #fbf6ea;
  border: 1px solid #e6dccb;
  border-left: 3px solid #a8461a;
  border-radius: 4px;
}

.mistake-list h3 {
  font-size: 16px;
  margin-bottom: 4px;
}

.mistake-list p {
  font-size: 14px;
  line-height: 1.75;
  color: #3f4a51;
}

.side-card {
  padding: 20px;
  background-color: #fffdf8;
  border: 1px solid #d8cfc0;
  border-radius: 8px;
}

.side-card h2 {
  font-size: 18px;
  margin-bottom: 12px;
}

.checklist-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 12px;
}

.checklist-list li {
  position: relative;
  padding-left: 24px;
  font-size: 14px;
  line-height: 1.7;
  color: #3f4a51;
}

.checklist-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 4px;
  width: 14px;
  height: 14px;
  border: 1px solid #23485c;
  border-radius: 3px;
  background-color: #fffdf8;
}

.side-note {
  font-size: 13px;
  line-height: 1.7;
  color: #5e6a70;
  padding-top: 10px;
  border-top: 1px dashed #d8cfc0;
}

.side-link-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.side-link-list a {
  display: block;
  padding: 8px 12px;
  font-size: 14px;
  font-weight: 700;
  color: #23485c;
  background-color: #f9f3e6;
  border: 1px solid #d8cfc0;
  border-radius: 4px;
  line-height: 1.5;
}

.side-link-list a:hover {
  background-color: #f1c75b;
  border-color: #e0b64c;
  color: #163241;
}

/* 5.4 入口标识 */
.page-head.narrow {
  max-width: 860px;
  margin-bottom: 24px;
}

.page-lead-note {
  margin-top: 10px;
  font-size: 14px;
  line-height: 1.75;
  color: #5e6a70;
}

.page-lead-note a {
  color: #a8461a;
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-lead-note a:hover {
  color: #163241;
}

.narrow-shell {
  max-width: 860px;
}

.exec-summary {
  padding: 22px;
  background-color: #fffdf8;
  border: 1px solid #d8cfc0;
  border-top: 4px solid #3f6b4f;
  border-radius: 8px;
  margin-bottom: 24px;
}

.exec-summary h2 {
  font-size: 22px;
  margin-bottom: 14px;
}

.exec-summary .summary-list {
  gap: 10px;
}

.summary-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 10px 12px;
  background-color: #f9f3e6;
  border-radius: 4px;
}

.summary-item p {
  font-size: 15px;
  line-height: 1.75;
  color: #3f4a51;
  min-width: 0;
}

.entry-figure {
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid #d8cfc0;
  background-color: #fffdf8;
  margin-bottom: 24px;
}

.entry-figure img {
  width: 100%;
  height: 300px;
  object-fit: cover;
}

.entry-figure-caption {
  padding: 12px 16px;
  background-color: #f9f3e6;
}

.entry-figure-caption p {
  font-size: 13px;
  line-height: 1.7;
  color: #5e6a70;
}

.toc-inline {
  padding: 16px 20px;
  background-color: #f9f3e6;
  border: 1px solid #d8cfc0;
  border-radius: 6px;
  margin-bottom: 28px;
}

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

.toc-inline-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 10px;
}

.toc-inline-list a {
  display: inline-block;
  padding: 6px 14px;
  font-size: 14px;
  font-weight: 700;
  color: #23485c;
  background-color: #fffdf8;
  border: 1px solid #d8cfc0;
  border-radius: 4px;
  line-height: 1.5;
}

.toc-inline-list a:hover {
  background-color: #f1c75b;
  border-color: #e0b64c;
  color: #163241;
}

.check-section {
  margin-bottom: 28px;
}

.check-section h2 {
  font-size: 24px;
  margin-bottom: 10px;
}

.check-block {
  padding: 20px 22px;
  background-color: #fffdf8;
  border: 1px solid #d8cfc0;
  border-radius: 8px;
  margin-bottom: 14px;
}

.check-block h3 {
  font-size: 18px;
  margin-bottom: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid #ece4d6;
}

.check-row {
  display: grid;
  grid-template-columns: 120px minmax(0, 1fr);
  gap: 12px;
  padding: 8px 0;
}

.check-row + .check-row {
  border-top: 1px dashed #ece4d6;
}

.check-label {
  font-size: 14px;
  font-weight: 700;
  color: #5e6a70;
  line-height: 1.7;
}

.check-text {
  font-size: 15px;
  line-height: 1.75;
  color: #1d2a33;
  min-width: 0;
}

.limits-section {
  margin-bottom: 28px;
}

.limits-section h2 {
  font-size: 24px;
  margin-bottom: 10px;
}

.limits-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  counter-reset: limits;
}

.limits-item {
  position: relative;
  padding: 16px 18px 16px 54px;
  background-color: #fffdf8;
  border: 1px solid #d8cfc0;
  border-left: 3px solid #a8461a;
  border-radius: 6px;
  counter-increment: limits;
}

.limits-item::before {
  content: counter(limits);
  position: absolute;
  left: 16px;
  top: 16px;
  width: 26px;
  height: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 700;
  color: #fffdf8;
  background-color: #a8461a;
  border-radius: 50%;
  line-height: 1;
}

.limits-item h3 {
  font-size: 16px;
  margin-bottom: 4px;
}

.limits-item p {
  font-size: 14px;
  line-height: 1.75;
  color: #3f4a51;
}

.tips-section {
  margin-bottom: 28px;
}

.tips-section h2 {
  font-size: 24px;
  margin-bottom: 14px;
}

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

.tips-section .tips-list li {
  padding: 14px 16px;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  background-color: #fffdf8;
  border: 1px solid #d8cfc0;
  border-radius: 6px;
}

.tip-item .tip-tag {
  flex: 0 0 auto;
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  color: #3f6b4f;
  background-color: #e6efe7;
  border: 1px solid #c3d6c8;
  padding: 2px 10px;
  border-radius: 3px;
  line-height: 1.6;
  margin-top: 2px;
}

.tip-item p {
  font-size: 15px;
  line-height: 1.75;
  color: #3f4a51;
  min-width: 0;
}

.related-section {
  margin-bottom: 8px;
}

.related-section h2 {
  font-size: 22px;
  margin-bottom: 14px;
}

.related-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.related-item {
  padding: 16px 18px;
  background-color: #f9f3e6;
  border: 1px solid #d8cfc0;
  border-radius: 6px;
  min-width: 0;
}

.related-item a {
  display: inline-block;
  font-size: 16px;
  font-weight: 700;
  color: #23485c;
  text-decoration: underline;
  text-underline-offset: 3px;
  margin-bottom: 6px;
  padding: 2px 0;
}

.related-item a:hover {
  color: #a8461a;
}

.related-item p {
  font-size: 14px;
  line-height: 1.7;
  color: #5e6a70;
}

/* 5.5 帮助台 */
.skip-link {
  position: absolute;
  left: 12px;
  top: -60px;
  z-index: 100;
  padding: 10px 16px;
  font-size: 14px;
  font-weight: 700;
  color: #fffdf8;
  background-color: #163241;
  border-radius: 4px;
  transition: top 0.18s ease;
}

.skip-link:focus {
  top: 12px;
  color: #fffdf8;
}

.page-title-area {
  margin-bottom: 24px;
  max-width: 860px;
}

.page-layout.help-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 32px;
  align-items: start;
}

.help-scene {
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid #d8cfc0;
  background-color: #fffdf8;
  margin-bottom: 28px;
}

.help-scene img {
  width: 100%;
  height: 240px;
  object-fit: cover;
}

.help-scene figcaption {
  padding: 10px 16px;
  background-color: #f9f3e6;
}

.help-categories {
  margin-bottom: 32px;
}

.help-categories h2 {
  font-size: 24px;
  margin-bottom: 8px;
}

.category-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.category-item {
  padding: 18px;
  background-color: #fffdf8;
  border: 1px solid #d8cfc0;
  border-top: 3px solid #23485c;
  border-radius: 6px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-width: 0;
}

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

.category-item p {
  font-size: 14px;
  line-height: 1.75;
  color: #3f4a51;
  flex: 1;
}

.category-item a {
  align-self: flex-start;
  font-size: 14px;
  font-weight: 700;
  color: #a8461a;
  text-decoration: underline;
  text-underline-offset: 3px;
  padding: 4px 0;
}

.category-item a:hover {
  color: #163241;
}

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

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

.side-panel {
  padding: 20px;
  background-color: #fffdf8;
  border: 1px solid #d8cfc0;
  border-radius: 8px;
}

.side-panel h2 {
  font-size: 18px;
  margin-bottom: 10px;
}

.check-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 14px;
}

.check-list li {
  position: relative;
  padding-left: 22px;
  font-size: 14px;
  line-height: 1.7;
  color: #3f4a51;
}

.check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  width: 12px;
  height: 12px;
  border: 1px solid #3f6b4f;
  border-radius: 3px;
  background-color: #e6efe7;
}

.side-link {
  display: block;
  padding: 8px 12px;
  font-size: 14px;
  font-weight: 700;
  color: #23485c;
  background-color: #f9f3e6;
  border: 1px solid #d8cfc0;
  border-radius: 4px;
  line-height: 1.5;
}

.side-link:hover {
  background-color: #f1c75b;
  border-color: #e0b64c;
  color: #163241;
}

.help-layout .related-list {
  grid-template-columns: 1fr;
  gap: 10px;
}

/* 5.6 站点说明 */
.notes-section {
  margin-bottom: 32px;
}

.notes-section h2 {
  font-size: 24px;
  margin-bottom: 14px;
}

.overview-figure {
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid #d8cfc0;
  background-color: #fffdf8;
  margin-bottom: 28px;
}

.overview-figure img {
  width: 100%;
  height: 300px;
  object-fit: cover;
}

.overview-figure figcaption {
  padding: 10px 16px;
  background-color: #f9f3e6;
}

.positioning-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 24px;
  align-items: start;
}

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

.positioning-body p {
  font-size: 15px;
  line-height: 1.85;
  color: #3f4a51;
}

.positioning-body p + p {
  margin-top: 12px;
}

.scope-body {
  min-width: 0;
  padding: 18px;
  background-color: #fffdf8;
  border: 1px solid #d8cfc0;
  border-radius: 8px;
}

.scope-body h3 {
  font-size: 17px;
  margin-bottom: 12px;
}

.scope-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.scope-list li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.75;
  color: #3f4a51;
}

.scope-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 8px;
  height: 8px;
  background-color: #23485c;
  border-radius: 2px;
}

.principle-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.principle-item {
  padding: 16px 18px;
  background-color: #fffdf8;
  border: 1px solid #d8cfc0;
  border-left: 3px solid #23485c;
  border-radius: 6px;
  font-size: 15px;
  line-height: 1.75;
  color: #3f4a51;
  min-width: 0;
}

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

.boundary-list li {
  position: relative;
  padding: 12px 16px 12px 40px;
  background-color: #fbf6ea;
  border: 1px solid #e6dccb;
  border-radius: 6px;
  font-size: 15px;
  line-height: 1.75;
  color: #3f4a51;
}

.boundary-list li::before {
  content: "×";
  position: absolute;
  left: 14px;
  top: 12px;
  width: 18px;
  height: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 700;
  color: #fffdf8;
  background-color: #a8461a;
  border-radius: 50%;
  line-height: 1;
}

.feedback-section {
  padding: 22px;
  background-color: #fffdf8;
  border: 1px solid #d8cfc0;
  border-radius: 8px;
}

.feedback-section > p {
  font-size: 15px;
  line-height: 1.8;
  color: #3f4a51;
  margin-bottom: 14px;
}

.feedback-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 16px;
}

.feedback-list li {
  position: relative;
  padding-left: 22px;
  font-size: 15px;
  line-height: 1.75;
  color: #3f4a51;
}

.feedback-list li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 11px;
  width: 7px;
  height: 7px;
  background-color: #3f6b4f;
  border-radius: 50%;
}

.feedback-link {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  font-size: 14px;
  padding-top: 14px;
  border-top: 1px dashed #d8cfc0;
}

.feedback-link a {
  color: #a8461a;
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 3px;
  padding: 4px 0;
}

.feedback-link a:hover {
  color: #163241;
}

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

.relation-item {
  padding: 14px 16px;
  background-color: #f9f3e6;
  border: 1px solid #d8cfc0;
  border-radius: 6px;
  font-size: 15px;
  line-height: 1.75;
  color: #3f4a51;
}

.related-links {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.related-links li {
  min-width: 0;
}

.related-links a {
  display: block;
  padding: 14px 16px;
  font-size: 15px;
  font-weight: 700;
  color: #23485c;
  background-color: #fffdf8;
  border: 1px solid #d8cfc0;
  border-radius: 6px;
  line-height: 1.6;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.related-links a:hover {
  background-color: #f1c75b;
  border-color: #e0b64c;
  color: #163241;
}

/* --------------------------------------------------------------------------
   6. pages · 404
   -------------------------------------------------------------------------- */

.error-main {
  display: block;
}

.error-inner {
  max-width: 760px;
  margin: 0 auto;
  padding: 72px 24px 88px;
  text-align: left;
}

.error-code {
  font-family: Georgia, "Songti SC", "SimSun", serif;
  font-size: 64px;
  font-weight: 700;
  line-height: 1.1;
  color: #a8461a;
  margin-bottom: 8px;
  font-variant-numeric: tabular-nums;
}

.error-inner h1 {
  font-size: 30px;
  margin-bottom: 14px;
}

.error-lead {
  font-size: 16px;
  line-height: 1.8;
  color: #3f4a51;
  margin-bottom: 28px;
}

.error-ways {
  padding: 22px;
  background-color: #fffdf8;
  border: 1px solid #d8cfc0;
  border-radius: 8px;
  margin-bottom: 22px;
}

.error-ways h2 {
  font-size: 20px;
  margin-bottom: 14px;
}

.error-link-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.error-link-list a {
  display: block;
  padding: 12px 16px;
  font-size: 15px;
  font-weight: 700;
  color: #23485c;
  background-color: #f9f3e6;
  border: 1px solid #d8cfc0;
  border-radius: 6px;
  line-height: 1.5;
}

.error-link-list a:hover {
  background-color: #f1c75b;
  border-color: #e0b64c;
  color: #163241;
}

.error-tip {
  font-size: 14px;
  line-height: 1.75;
  color: #5e6a70;
  margin-bottom: 20px;
}

.error-home-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 10px 24px;
  font-size: 15px;
  font-weight: 700;
  color: #fffdf8;
  background-color: #163241;
  border: 1px solid #163241;
  border-radius: 6px;
}

.error-home-link:hover {
  background-color: #a8461a;
  border-color: #a8461a;
  color: #fffdf8;
}

/* --------------------------------------------------------------------------
   7. responsive
   -------------------------------------------------------------------------- */

@media (max-width: 1024px) {
  .header-inner {
    padding: 12px 20px;
    gap: 8px 20px;
  }

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

  .hero-inner {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.9fr);
    gap: 32px;
    padding: 40px 20px;
  }

  .hero-copy h1 {
    font-size: 34px;
  }

  .hero-figure img {
    height: 300px;
  }

  .section-inner {
    padding: 34px 20px;
  }

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

  .sidebar-left .page-layout,
  .page-layout.sidebar-left {
    grid-template-columns: 220px minmax(0, 1fr);
    gap: 24px;
  }

  .page-layout.layout-main-aside {
    grid-template-columns: minmax(0, 1fr) 280px;
    gap: 24px;
  }

  .page-layout.help-layout {
    grid-template-columns: minmax(0, 1fr) 260px;
    gap: 24px;
  }

  .topic-row {
    grid-template-columns: 130px minmax(0, 1fr) 170px;
    gap: 16px;
  }

  .topic-row .topic-thumb {
    width: 130px;
  }

  .topic-row .topic-thumb img {
    height: 88px;
  }

  .entry-layout {
    gap: 24px;
  }
}

@media (max-width: 760px) {
  /* 页头与移动导航 */
  .header-inner {
    flex-wrap: wrap;
    align-items: center;
    padding: 12px 16px;
  }

  .brand-name {
    font-size: 21px;
  }

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

  .site-nav {
    width: 100%;
    margin-left: 0;
    order: 3;
  }

  .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    padding-top: 8px;
    border-top: 1px solid #d8cfc0;
    margin-top: 4px;
  }

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

  .nav-list a {
    padding: 12px 14px;
    min-height: 44px;
    display: flex;
    align-items: center;
    font-size: 15px;
    border-bottom: 1px solid #ece4d6;
    border-radius: 0;
  }

  .nav-list a.is-current {
    border-bottom-color: #ece4d6;
    border-left: 3px solid #a8461a;
    padding-left: 11px;
  }

  /* 首屏 */
  .hero-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
    padding: 28px 16px;
  }

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

  .hero-lead {
    font-size: 16px;
    margin-bottom: 20px;
  }

  .hero-actions {
    gap: 10px;
  }

  .hero-actions .btn {
    flex: 1 1 180px;
  }

  .hero-figure img {
    height: 220px;
  }

  /* 通用区块 */
  .section-inner {
    padding: 28px 16px;
  }

  .section-head {
    margin-bottom: 18px;
  }

  .section-head h2 {
    font-size: 21px;
  }

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

  .page-header {
    margin-bottom: 20px;
    padding-bottom: 16px;
  }

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

  /* 首页模块 */
  .channel-tags {
    gap: 8px;
  }

  .channel-tags a {
    padding: 8px 14px;
    font-size: 13px;
    min-height: 40px;
    display: inline-flex;
    align-items: center;
  }

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

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

  .topic-row .topic-thumb {
    width: 100%;
  }

  .topic-row .topic-thumb img {
    height: 160px;
  }

  .topic-row .topic-meta {
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px 12px;
  }

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

  .entry-cover img {
    height: 200px;
  }

  .entry-fields {
    grid-template-columns: 84px minmax(0, 1fr);
  }

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

  .maintenance-list {
    grid-template-columns: minmax(0, 1fr);
    gap: 14px;
  }

  /* 频道矩阵 */
  .summary-block {
    grid-template-columns: minmax(0, 1fr);
    gap: 18px;
    padding: 18px;
  }

  .summary-figure img {
    height: 180px;
  }

  .table-wrap {
    overflow-x: visible;
    border: none;
    background-color: transparent;
    border-radius: 0;
  }

  .matrix-table {
    min-width: 0;
    display: block;
    font-size: 14px;
  }

  .matrix-table caption {
    display: block;
    border: 1px solid #d8cfc0;
    border-radius: 6px 6px 0 0;
  }

  .matrix-table thead {
    display: none;
  }

  .matrix-table tbody {
    display: block;
  }

  .matrix-table tbody tr {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: 0;
    background-color: #fffdf8;
    border: 1px solid #d8cfc0;
    border-radius: 6px;
    margin-bottom: 12px;
    overflow: hidden;
  }

  .matrix-table tbody th {
    display: block;
    padding: 12px 14px;
    border-bottom: 1px solid #d8cfc0;
    white-space: normal;
    font-size: 16px;
  }

  .matrix-table tbody td {
    display: grid;
    grid-template-columns: 84px minmax(0, 1fr);
    gap: 10px;
    padding: 10px 14px;
    border-bottom: 1px solid #ece4d6;
    align-items: start;
  }

  .matrix-table tbody td::before {
    font-size: 13px;
    font-weight: 700;
    color: #5e6a70;
    line-height: 1.7;
    content: "";
  }

  .matrix-table tbody td:nth-of-type(1)::before {
    content: "内容特征";
  }

  .matrix-table tbody td:nth-of-type(2)::before {
    content: "适合场景";
  }

  .matrix-table tbody td:nth-of-type(3)::before {
    content: "对应专题";
  }

  .matrix-table tbody tr:last-child th,
  .matrix-table tbody tr:last-child td {
    border-bottom: 1px solid #ece4d6;
  }

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

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

  .profile-fields dt {
    margin-top: 6px;
  }

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

  /* 专题书架 */
  .sidebar-left .page-layout,
  .page-layout.sidebar-left {
    grid-template-columns: minmax(0, 1fr);
    gap: 20px;
  }

  .topic-sidebar {
    position: static;
    padding: 16px;
  }

  .topic-nav-list {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 8px;
  }

  .topic-nav-list li {
    flex: 1 1 140px;
  }

  .topic-nav-list a {
    justify-content: flex-start;
  }

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

  .topic-item .topic-thumb {
    width: 100%;
  }

  .topic-item .topic-thumb img {
    height: 170px;
  }

  /* 观看手册 */
  .page-layout.layout-main-aside {
    grid-template-columns: minmax(0, 1fr);
    gap: 20px;
  }

  .step-nav-list li {
    flex: 1 1 100%;
  }

  .step-block,
  .example-panel,
  .mistakes {
    padding: 18px;
  }

  .example-figure img {
    height: 200px;
  }

  /* 入口标识 */
  .entry-figure img {
    height: 220px;
  }

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

  .check-text {
    padding-bottom: 6px;
  }

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

  .tips-section .tips-list li {
    flex-direction: column;
    gap: 6px;
  }

  /* 帮助台 */
  .page-layout.help-layout {
    grid-template-columns: minmax(0, 1fr);
    gap: 20px;
  }

  .help-scene img {
    height: 190px;
  }

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

  /* 站点说明 */
  .overview-figure img {
    height: 210px;
  }

  .positioning-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 18px;
  }

  .principle-list {
    grid-template-columns: minmax(0, 1fr);
    gap: 10px;
  }

  .related-links {
    grid-template-columns: minmax(0, 1fr);
    gap: 10px;
  }

  /* 页脚 */
  .footer-inner {
    padding: 36px 16px 24px;
  }

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

  .footer-col a {
    display: block;
    padding: 6px 0;
    min-height: 32px;
  }

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

  /* 404 */
  .error-inner {
    padding: 44px 16px 60px;
  }

  .error-code {
    font-size: 48px;
  }

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

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

@media (max-width: 480px) {
  .brand-slogan {
    font-size: 12px;
  }

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

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

  .hero-figure img {
    height: 190px;
  }

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

  .topic-row .topic-thumb img {
    height: 140px;
  }

  .entry-cover img {
    height: 170px;
  }

  .entry-fields {
    grid-template-columns: minmax(0, 1fr);
    gap: 2px;
  }

  .entry-fields dt {
    margin-top: 8px;
  }

  .matrix-table tbody td {
    grid-template-columns: minmax(0, 1fr);
    gap: 2px;
  }

  .matrix-table tbody td::before {
    display: block;
  }

  .topic-item .topic-thumb img {
    height: 140px;
  }

  .summary-figure img {
    height: 150px;
  }

  .example-figure img {
    height: 170px;
  }

  .entry-figure img {
    height: 180px;
  }

  .help-scene img {
    height: 160px;
  }

  .overview-figure img {
    height: 180px;
  }

  .limits-item {
    padding: 14px 14px 14px 48px;
  }

  .limits-item::before {
    left: 12px;
    top: 14px;
  }

  .tips-section .tips-list li {
    padding: 14px;
  }
}