:root {
  --green: #3f6d3a;
  --green-dark: #2f532c;
  --green-soft: #e7ede0;
  --wheat: #d9a441;
  --wheat-soft: #f3e3c2;
  --bg: #f7f5ef;
  --paper: #fffdf8;
  --ink: #23301f;
  --ink-soft: #4c5a46;
  --line: #d8dccf;
  --line-strong: #b9c2ac;
  --radius: 6px;
  --shadow-soft: 0 1px 0 rgba(35, 48, 31, 0.04);
  --font-mono: "SFMono-Regular", "Menlo", "Consolas", "Courier New", monospace;
}

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

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

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

body.site-body {
  margin: 0;
  background-color: var(--bg);
  color: var(--ink);
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", sans-serif;
  font-size: 15px;
  line-height: 1.75;
  font-weight: 400;
  text-align: left;
}

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

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

a:hover,
a:focus-visible {
  color: var(--green);
  text-decoration: underline;
}

p {
  margin: 0 0 12px;
}

h1,
h2,
h3,
h4 {
  margin: 0 0 10px;
  font-weight: 600;
  line-height: 1.35;
  color: var(--ink);
}

ul,
ol {
  margin: 0 0 12px;
  padding: 0;
  list-style: none;
}

strong {
  font-weight: 600;
  color: var(--ink);
}

button {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}

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

.site-header {
  background-color: var(--paper);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 30;
}

.header-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 10px 20px;
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  flex: 0 0 auto;
}

.brand:hover,
.brand:focus-visible {
  text-decoration: none;
  color: var(--green-dark);
}

.brand-mark {
  width: 34px;
  height: 34px;
  border-radius: var(--radius);
  background-color: var(--green);
  border: 1px solid var(--green-dark);
  position: relative;
  flex: 0 0 auto;
}

.brand-mark::after {
  content: "";
  position: absolute;
  inset: 9px 8px;
  border-left: 2px solid var(--wheat);
  border-right: 2px solid var(--wheat);
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.25;
}

.brand-name {
  font-size: 17px;
  font-weight: 600;
  color: var(--ink);
}

.brand-slogan {
  font-size: 12px;
  color: var(--ink-soft);
}

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

.nav-toggle {
  display: none;
  margin-left: auto;
  width: 44px;
  height: 44px;
  padding: 0;
  background-color: var(--paper);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  cursor: pointer;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
}

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

.nav-list {
  display: flex;
  align-items: center;
  gap: 4px;
  margin: 0;
}

.nav-item {
  margin: 0;
}

.nav-link {
  display: inline-block;
  padding: 9px 12px;
  font-size: 14px;
  color: var(--ink-soft);
  border-radius: var(--radius);
  border: 1px solid transparent;
}

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--green-dark);
  background-color: var(--green-soft);
  text-decoration: none;
}

.nav-link.is-current {
  color: var(--green-dark);
  border-color: var(--line-strong);
  background-color: var(--green-soft);
  font-weight: 600;
}

.site-main {
  display: block;
}

.home-main {
  padding-bottom: 8px;
}

.inner-main {
  max-width: 1120px;
  margin: 0 auto;
  padding: 20px 20px 48px;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--ink-soft);
  padding: 6px 0 14px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 22px;
}

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

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

.page-header {
  margin-bottom: 32px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--line);
}

.page-title {
  font-size: 32px;
  font-weight: 600;
  line-height: 1.3;
  color: var(--ink);
  margin: 0 0 12px;
}

.page-description {
  font-size: 15px;
  color: var(--ink-soft);
  max-width: 760px;
  margin: 0;
}

.page-description a {
  color: var(--green-dark);
}

.section {
  margin-bottom: 46px;
}

.section-head {
  margin-bottom: 22px;
  max-width: 780px;
}

.section-title {
  font-size: 22px;
  font-weight: 600;
  color: var(--ink);
  margin: 0 0 8px;
  padding-left: 12px;
  border-left: 3px solid var(--wheat);
}

.section-desc,
.section-intro,
.section-lead {
  font-size: 14px;
  color: var(--ink-soft);
  max-width: 760px;
  margin: 0 0 4px;
}

.section-desc a,
.section-intro a,
.section-lead a {
  color: var(--green-dark);
}

.site-footer {
  background-color: var(--paper);
  border-top: 1px solid var(--line);
  margin-top: 20px;
}

.footer-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 34px 20px 20px;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1.2fr;
  gap: 30px;
}

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

.footer-brand {
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
  margin: 0 0 8px;
}

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

.footer-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
  margin: 0 0 10px;
}

.footer-list {
  margin: 0;
}

.footer-list li {
  margin: 0 0 6px;
}

.footer-list a {
  font-size: 13px;
  color: var(--ink-soft);
}

.footer-list a:hover,
.footer-list a:focus-visible {
  color: var(--green-dark);
}

.footer-text {
  font-size: 13px;
  color: var(--ink-soft);
  margin: 0 0 6px;
}

.footer-note {
  font-size: 12px;
  color: var(--ink-soft);
  margin: 0;
}

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

.footer-copy {
  max-width: 1120px;
  margin: 0 auto;
  padding: 14px 20px;
  font-size: 12px;
  color: var(--ink-soft);
}

.btn {
  display: inline-block;
  padding: 11px 20px;
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--radius);
  border: 1px solid transparent;
  min-height: 44px;
  line-height: 20px;
}

.btn:hover,
.btn:focus-visible {
  text-decoration: none;
}

.btn-primary {
  background-color: var(--green);
  border-color: var(--green-dark);
  color: #fffdf8;
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background-color: var(--green-dark);
  color: #fffdf8;
}

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

.btn-ghost:hover,
.btn-ghost:focus-visible {
  background-color: var(--green-soft);
  color: var(--green-dark);
}

.btn-outline {
  background-color: transparent;
  border-color: var(--green);
  color: var(--green-dark);
}

.btn-outline:hover,
.btn-outline:focus-visible {
  background-color: var(--green);
  color: #fffdf8;
}

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

.channel-card {
  background-color: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px 16px 14px;
  box-shadow: var(--shadow-soft);
}

.channel-card:hover {
  border-color: var(--line-strong);
}

.channel-no {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--green-dark);
  background-color: var(--green-soft);
  border: 1px solid var(--line-strong);
  border-radius: 4px;
  padding: 1px 8px;
  margin-bottom: 8px;
}

.channel-name {
  font-size: 16px;
  margin: 0 0 8px;
}

.channel-scope {
  font-size: 13px;
  color: var(--ink-soft);
  margin: 0 0 8px;
}

.channel-typical,
.channel-pick {
  font-size: 13px;
  color: var(--ink);
  margin: 0;
  padding-top: 8px;
  border-top: 1px dashed var(--line);
}

.channel-typical::before,
.channel-pick::before {
  content: "代表方向 · ";
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--wheat);
}

.channel-pick::before {
  content: "选择建议 · ";
}

.topic-card {
  background-color: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.topic-card:hover {
  border-color: var(--line-strong);
}

.topic-media {
  margin: 0;
  border-bottom: 1px solid var(--line);
  background-color: var(--green-soft);
}

.topic-media img {
  width: 100%;
  height: 168px;
  object-fit: cover;
}

.topic-body {
  padding: 14px 16px 16px;
}

.topic-name {
  font-size: 16px;
  margin: 0 0 8px;
}

.topic-scope,
.topic-typical {
  font-size: 13px;
  color: var(--ink-soft);
  margin: 0 0 8px;
}

.topic-typical {
  margin-bottom: 0;
  padding-top: 8px;
  border-top: 1px dashed var(--line);
  color: var(--ink);
}

.topic-typical::before {
  content: "代表方向 · ";
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--wheat);
}

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

.note-item {
  display: flex;
  gap: 12px;
  background-color: var(--paper);
  border: 1px solid var(--line);
  border-left: 3px solid var(--wheat);
  border-radius: var(--radius);
  padding: 16px;
}

.note-no {
  font-family: var(--font-mono);
  font-size: 20px;
  color: var(--wheat);
  line-height: 1.2;
  flex: 0 0 auto;
}

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

.note-title {
  font-size: 15px;
  margin: 0 0 6px;
}

.note-text {
  font-size: 13px;
  color: var(--ink-soft);
  margin: 0;
}

.related-item {
  background-color: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px 16px;
}

.related-item:hover {
  border-color: var(--line-strong);
}

.related-name {
  font-size: 15px;
  margin: 0 0 6px;
}

.related-desc {
  font-size: 13px;
  color: var(--ink-soft);
  margin: 0;
}

.aside-title {
  font-size: 16px;
  font-weight: 600;
  margin: 0 0 8px;
}

.aside-text {
  font-size: 13px;
  color: var(--ink-soft);
  margin: 0 0 12px;
}

.letter-index {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 20px;
}

.letter-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  min-height: 44px;
  padding: 0 10px;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--green-dark);
  background-color: var(--paper);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
}

.letter-link:hover,
.letter-link:focus-visible {
  background-color: var(--green);
  border-color: var(--green-dark);
  color: #fffdf8;
  text-decoration: none;
}

.aside-panel {
  background-color: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px;
  margin-bottom: 16px;
}

.aside-panel-title {
  font-size: 14px;
  margin: 0 0 10px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
}

.aside-steps {
  counter-reset: aside;
  margin: 0;
}

.aside-steps li {
  position: relative;
  padding-left: 24px;
  font-size: 13px;
  color: var(--ink-soft);
  margin-bottom: 8px;
}

.aside-steps li::before {
  counter-increment: aside;
  content: counter(aside) ".";
  position: absolute;
  left: 0;
  top: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--wheat);
}

.aside-links {
  font-size: 13px;
  color: var(--ink-soft);
  margin: 0;
}

.field-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--paper);
}

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

.field-table-caption {
  text-align: left;
  padding: 12px 16px;
  font-size: 13px;
  color: var(--ink-soft);
  border-bottom: 1px solid var(--line);
}

.field-table th,
.field-table td {
  text-align: left;
  padding: 12px 16px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

.field-table thead th {
  background-color: var(--green-soft);
  font-weight: 600;
  color: var(--green-dark);
  font-size: 13px;
}

.field-table tbody th {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--ink);
  white-space: nowrap;
}

.field-table tbody tr:last-child th,
.field-table tbody tr:last-child td {
  border-bottom: 0;
}

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

.faq-item {
  border-bottom: 1px solid var(--line);
  background-color: var(--paper);
}

.faq-question {
  cursor: pointer;
  padding: 14px 40px 14px 16px;
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
  position: relative;
  list-style: none;
  min-height: 44px;
}

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

.faq-question::after {
  content: "展开";
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  color: var(--green-dark);
}

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

.faq-question:hover {
  color: var(--green-dark);
}

.faq-answer {
  margin: 0;
  padding: 0 16px 16px;
  font-size: 14px;
  color: var(--ink-soft);
}

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

/* 首页 */
.hero {
  border-bottom: 1px solid var(--line);
  background-color: var(--paper);
}

.hero-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 20px;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  gap: 0;
  align-items: stretch;
}

.hero-media {
  margin: 0;
  align-self: stretch;
  overflow: hidden;
  background-color: var(--green-soft);
}

.hero-media img {
  width: 100%;
  height: 100%;
  min-height: 320px;
  object-fit: cover;
}

.hero-content {
  padding: 40px 0 40px 36px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-width: 0;
}

.hero-eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--green-dark);
  margin: 0 0 10px;
  padding: 2px 8px;
  border: 1px dashed var(--line-strong);
  border-radius: 4px;
  align-self: flex-start;
}

.hero-title {
  font-size: 30px;
  font-weight: 600;
  line-height: 1.35;
  margin: 0 0 14px;
  color: var(--ink);
}

.hero-lead {
  font-size: 15px;
  color: var(--ink-soft);
  margin: 0 0 18px;
  max-width: 520px;
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 22px;
}

.hero-tag {
  font-size: 13px;
  color: var(--green-dark);
  background-color: var(--green-soft);
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  padding: 4px 12px;
}

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

.channel-overview,
.topics-preview,
.before-watch {
  max-width: 1120px;
  margin: 0 auto;
  padding: 46px 20px 0;
}

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

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

.boundary-entry {
  max-width: 1120px;
  margin: 46px auto 0;
  padding: 0 20px;
}

.boundary-inner {
  background-color: var(--paper);
  border: 1px solid var(--line);
  border-left: 3px solid var(--green);
  border-radius: var(--radius);
  padding: 26px 24px;
}

.boundary-text {
  font-size: 14px;
  color: var(--ink-soft);
  max-width: 760px;
  margin: 0 0 18px;
}

/* 频道分类页 */
.page-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  gap: 32px;
  align-items: start;
}

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

.channel-group {
  margin-bottom: 34px;
  scroll-margin-top: 90px;
}

.group-title {
  font-size: 18px;
  margin: 0 0 12px;
  padding: 8px 0 8px 12px;
  border-left: 3px solid var(--wheat);
  background-color: var(--paper);
  border-top: 1px solid var(--line);
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  border-radius: 0 var(--radius) var(--radius) 0;
  position: sticky;
  top: 66px;
  z-index: 5;
}

.group-media {
  margin: 0 0 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background-color: var(--green-soft);
}

.group-media img {
  width: 100%;
  height: 190px;
  object-fit: cover;
}

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

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

.channel-aside {
  min-width: 0;
  position: sticky;
  top: 82px;
}

/* 专题片单页 */
.section-topics {
  margin-bottom: 46px;
}

.topic-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.topic-index {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--green-dark);
  background-color: var(--green-soft);
  border: 1px solid var(--line-strong);
  border-radius: 4px;
  padding: 1px 8px;
  display: inline-block;
  margin: 0 0 8px;
}

.topic-fields {
  margin: 0 0 10px;
  font-size: 13px;
}

.topic-fields dt {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--wheat);
  margin-top: 6px;
}

.topic-fields dd {
  margin: 0;
  color: var(--ink-soft);
}

.topic-link {
  margin: 0;
  font-size: 13px;
  padding-top: 10px;
  border-top: 1px dashed var(--line);
}

.field-table tbody td {
  color: var(--ink-soft);
}

.section-footnote {
  font-size: 13px;
  color: var(--ink-soft);
  margin: 14px 0 0;
}

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

/* 观看指南页 */
.prepare-section,
.verify-section,
.faq-section,
.related-section {
  margin-bottom: 46px;
}

.guide-figure {
  margin: 0 0 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background-color: var(--green-soft);
}

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

.guide-figure figcaption {
  padding: 10px 14px;
  font-size: 12px;
  color: var(--ink-soft);
  background-color: var(--paper);
  border-top: 1px solid var(--line);
}

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

.prepare-item {
  display: flex;
  gap: 12px;
  background-color: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px;
}

.prepare-num {
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--wheat);
  line-height: 1.3;
  flex: 0 0 auto;
}

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

.prepare-name {
  font-size: 15px;
  margin: 0 0 6px;
}

.prepare-desc {
  font-size: 13px;
  color: var(--ink-soft);
  margin: 0;
}

.verify-steps {
  counter-reset: step;
  display: grid;
  gap: 14px;
  margin: 0;
}

.verify-step {
  position: relative;
  background-color: var(--paper);
  border: 1px solid var(--line);
  border-left: 3px solid var(--green);
  border-radius: var(--radius);
  padding: 16px 18px 16px 62px;
}

.step-index {
  position: absolute;
  left: 16px;
  top: 16px;
  font-family: var(--font-mono);
  font-size: 20px;
  color: var(--green);
  line-height: 1.2;
}

.step-name {
  font-size: 15px;
  margin: 0 0 6px;
}

.step-desc {
  font-size: 14px;
  color: var(--ink-soft);
  margin: 0 0 8px;
}

.step-check {
  font-size: 13px;
  margin: 0;
  padding-top: 8px;
  border-top: 1px dashed var(--line);
  color: var(--ink);
}

.check-label {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--wheat);
  margin-right: 6px;
}

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

.related-card {
  background-color: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px;
}

.related-card:hover {
  border-color: var(--line-strong);
}

/* 内容边界与反馈页 */
.boundary-intro {
  margin-bottom: 46px;
}

.boundary-intro-body {
  max-width: 760px;
  font-size: 15px;
  color: var(--ink-soft);
  margin-bottom: 20px;
}

.boundary-intro-body strong {
  color: var(--green-dark);
}

.boundary-figure {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background-color: var(--green-soft);
}

.boundary-figure img {
  width: 100%;
  height: 250px;
  object-fit: cover;
}

.boundary-figure figcaption {
  padding: 10px 14px;
  font-size: 12px;
  color: var(--ink-soft);
  background-color: var(--paper);
  border-top: 1px solid var(--line);
}

.scope-notes {
  margin-bottom: 46px;
}

.scope-list {
  counter-reset: scope;
  display: grid;
  gap: 14px;
  margin: 0 0 20px;
}

.scope-item {
  display: flex;
  gap: 14px;
  background-color: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px;
}

.scope-index {
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--wheat);
  line-height: 1.3;
  flex: 0 0 auto;
}

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

.scope-name {
  font-size: 15px;
  margin: 0 0 6px;
}

.scope-body p {
  font-size: 13px;
  color: var(--ink-soft);
  margin: 0;
}

.scope-note {
  background-color: var(--green-soft);
  border: 1px dashed var(--line-strong);
  border-radius: var(--radius);
  padding: 16px 18px;
}

.scope-note-text {
  font-size: 13px;
  color: var(--ink-soft);
  margin: 0;
}

.scope-note-text strong {
  color: var(--green-dark);
}

.feedback-path {
  margin-bottom: 46px;
}

.feedback-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-bottom: 20px;
}

.feedback-card {
  background-color: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px;
  display: flex;
  flex-direction: column;
}

.feedback-index {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--green-dark);
  background-color: var(--green-soft);
  border: 1px solid var(--line-strong);
  border-radius: 4px;
  padding: 1px 8px;
  align-self: flex-start;
  margin-bottom: 10px;
}

.feedback-name {
  font-size: 15px;
  margin: 0 0 8px;
}

.feedback-desc {
  font-size: 13px;
  color: var(--ink-soft);
  margin: 0 0 14px;
}

.feedback-link {
  margin-top: auto;
  font-size: 13px;
  font-weight: 600;
  color: var(--green-dark);
}

.feedback-note {
  background-color: var(--paper);
  border: 1px solid var(--line);
  border-left: 3px solid var(--wheat);
  border-radius: var(--radius);
  padding: 18px 20px;
}

.feedback-note-title {
  font-size: 15px;
  margin: 0 0 10px;
}

.feedback-note-list {
  margin: 0 0 10px;
}

.feedback-note-list li {
  font-size: 13px;
  color: var(--ink-soft);
  padding-left: 16px;
  position: relative;
  margin-bottom: 6px;
}

.feedback-note-list li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--wheat);
}

.feedback-note-text {
  font-size: 13px;
  color: var(--ink-soft);
  margin: 0;
}

.boundary-related {
  margin-bottom: 20px;
}

.boundary-related .related-list {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

/* 404 */
.error-main {
  max-width: 1120px;
  margin: 0 auto;
  padding: 60px 20px 80px;
}

.error-inner {
  max-width: 720px;
  background-color: var(--paper);
  border: 1px solid var(--line);
  border-left: 3px solid var(--wheat);
  border-radius: var(--radius);
  padding: 32px 28px;
}

.error-code {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--wheat);
  margin: 0 0 10px;
}

.error-title {
  font-size: 26px;
  margin: 0 0 14px;
}

.error-text {
  font-size: 14px;
  color: var(--ink-soft);
  margin: 0 0 10px;
}

.error-links {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin: 22px 0;
}

.error-links a {
  display: block;
  padding: 12px 14px;
  font-size: 14px;
  color: var(--green-dark);
  background-color: var(--green-soft);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  min-height: 44px;
}

.error-links a:hover,
.error-links a:focus-visible {
  background-color: var(--green);
  border-color: var(--green-dark);
  color: #fffdf8;
  text-decoration: none;
}

.error-home-btn {
  display: inline-block;
  padding: 11px 22px;
  font-size: 14px;
  font-weight: 600;
  color: #fffdf8;
  background-color: var(--green);
  border: 1px solid var(--green-dark);
  border-radius: var(--radius);
  min-height: 44px;
  line-height: 20px;
}

.error-home-btn:hover,
.error-home-btn:focus-visible {
  background-color: var(--green-dark);
  color: #fffdf8;
  text-decoration: none;
}

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

@media (max-width: 960px) {
  .header-inner {
    padding: 10px 16px;
  }

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

  .site-nav {
    flex: 1 0 100%;
    margin-left: 0;
  }

  .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    border-top: 1px solid var(--line);
    padding-top: 6px;
  }

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

  .nav-link {
    display: block;
    padding: 12px 12px;
    min-height: 44px;
  }

  .hero-inner {
    grid-template-columns: minmax(0, 1fr);
    padding: 0 16px;
  }

  .hero-media img {
    min-height: 220px;
    height: 240px;
  }

  .hero-content {
    padding: 26px 0 30px;
  }

  .hero-title {
    font-size: 25px;
  }

  .channel-overview,
  .topics-preview,
  .before-watch,
  .boundary-entry {
    padding-left: 16px;
    padding-right: 16px;
    padding-top: 36px;
  }

  .boundary-entry {
    margin-top: 36px;
  }

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

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

  .inner-main {
    padding: 16px 16px 40px;
  }

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

  .page-layout {
    grid-template-columns: minmax(0, 1fr);
    gap: 26px;
  }

  .channel-aside {
    position: static;
    order: 2;
  }

  .channel-main {
    order: 1;
  }

  .group-title {
    position: static;
  }

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

  .topic-list,
  .topic-grid,
  .prepare-list,
  .related-list,
  .related-grid,
  .feedback-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .boundary-related .related-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .footer-inner {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    padding: 28px 16px 18px;
  }

  .footer-copy {
    padding: 14px 16px;
  }
}

@media (max-width: 640px) {
  body.site-body {
    font-size: 14px;
  }

  .brand-name {
    font-size: 16px;
  }

  .brand-slogan {
    font-size: 11px;
  }

  .hero-title {
    font-size: 22px;
  }

  .hero-media img {
    height: 200px;
    min-height: 200px;
  }

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

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

  .section-title {
    font-size: 19px;
  }

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

  .page-header {
    margin-bottom: 24px;
    padding-bottom: 18px;
  }

  .channel-grid,
  .note-list,
  .topic-list,
  .topic-grid,
  .channel-list,
  .prepare-list,
  .related-list,
  .related-grid,
  .feedback-grid,
  .boundary-related .related-list {
    grid-template-columns: minmax(0, 1fr);
  }

  .topic-media img {
    height: 150px;
  }

  .group-media img {
    height: 160px;
  }

  .guide-figure img,
  .boundary-figure img {
    height: 180px;
  }

  .verify-step {
    padding: 14px 16px 14px 16px;
  }

  .step-index {
    position: static;
    display: block;
    margin-bottom: 6px;
  }

  .footer-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 22px;
  }

  .error-inner {
    padding: 24px 18px;
  }

  .error-title {
    font-size: 22px;
  }

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

  .field-table th,
  .field-table td {
    padding: 10px 12px;
  }
}