/* ==========================================================================
   光棍影院手机在线 · 全站样式
   分组：base / layout / components / pages / responsive
   ========================================================================== */

/* --------------------------------------------------------------------------
   base
   -------------------------------------------------------------------------- */

:root {
  --c-primary: #1e3a8a;
  --c-primary-soft: #e8edf9;
  --c-primary-dark: #16306f;
  --c-accent: #f59e0b;
  --c-accent-soft: #fef3e2;
  --c-page: #f8fafc;
  --c-surface: #ffffff;
  --c-text: #1f2937;
  --c-text-soft: #5b6676;
  --c-line: #e2e8f0;
  --c-line-strong: #cbd5e1;
  --radius: 8px;
  --radius-sm: 6px;
  --shadow-card: 0 1px 2px rgba(30, 58, 138, 0.06), 0 6px 16px rgba(15, 23, 42, 0.05);
  --shell-width: 1080px;
  --read-width: 720px;
}

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

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

body {
  margin: 0;
  padding: 0;
  background-color: var(--c-page);
  color: var(--c-text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  color: var(--c-text);
  font-weight: 700;
  line-height: 1.35;
}

p {
  margin: 0;
}

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

a {
  color: var(--c-primary);
  text-decoration: none;
}

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

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

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

figure {
  margin: 0;
}

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

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

th,
td {
  text-align: left;
  vertical-align: top;
}

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

.site-body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  background-color: var(--c-page);
  color: var(--c-text);
  font-size: 16px;
  line-height: 1.7;
}

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

.header-inner {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  width: 100%;
  max-width: var(--shell-width);
  margin: 0 auto;
  padding: 12px 20px;
}

.brand {
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin-right: auto;
  color: var(--c-text);
  text-decoration: none;
}

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

.brand-name {
  color: var(--c-primary);
  font-size: 19px;
  font-weight: 700;
  line-height: 1.3;
}

.brand-slogan {
  color: var(--c-text-soft);
  font-size: 12px;
  line-height: 1.4;
}

.site-nav {
  display: block;
}

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

.nav-list li {
  display: block;
}

.nav-list a {
  display: block;
  padding: 8px 12px;
  min-height: 44px;
  border-bottom: 2px solid transparent;
  color: var(--c-text);
  font-size: 15px;
  line-height: 28px;
  white-space: nowrap;
}

.nav-list a:hover,
.nav-list a:focus-visible {
  color: var(--c-primary);
  border-bottom-color: var(--c-line-strong);
  text-decoration: none;
}

.nav-list a.is-current {
  color: var(--c-primary);
  border-bottom-color: var(--c-primary);
  font-weight: 700;
}

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid var(--c-line-strong);
  border-radius: var(--radius-sm);
  background-color: var(--c-surface);
  color: var(--c-primary);
  font-size: 15px;
  line-height: 1;
  cursor: pointer;
}

.nav-toggle::before {
  content: "菜单";
  font-size: 14px;
  font-weight: 700;
}

.nav-toggle:hover {
  border-color: var(--c-primary);
}

.site-main {
  flex: 1 0 auto;
  width: 100%;
  max-width: var(--shell-width);
  margin: 0 auto;
  padding: 24px 20px 48px;
}

.inner-main {
  max-width: var(--shell-width);
}

.site-footer {
  flex: 0 0 auto;
  margin-top: 24px;
  background-color: var(--c-surface);
  border-top: 1px solid var(--c-line);
}

.footer-inner {
  display: grid;
  grid-template-columns: minmax(220px, 1.4fr) repeat(3, minmax(140px, 1fr)) minmax(180px, 1.2fr);
  gap: 28px 24px;
  width: 100%;
  max-width: var(--shell-width);
  margin: 0 auto;
  padding: 36px 20px 24px;
}

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

.footer-brand {
  margin-bottom: 8px;
  color: var(--c-primary);
  font-size: 17px;
  font-weight: 700;
}

.footer-desc {
  color: var(--c-text-soft);
  font-size: 14px;
  line-height: 1.7;
}

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

.footer-title {
  margin-bottom: 10px;
  color: var(--c-text);
  font-size: 15px;
  font-weight: 700;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.footer-col li {
  font-size: 14px;
  line-height: 1.6;
}

.footer-col a {
  color: var(--c-text-soft);
}

.footer-col a:hover,
.footer-col a:focus-visible {
  color: var(--c-primary);
}

.footer-boundary li {
  position: relative;
  padding-left: 14px;
  color: var(--c-text-soft);
}

.footer-boundary li::before {
  content: "";
  position: absolute;
  top: 10px;
  left: 0;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background-color: var(--c-accent);
}

.footer-bottom {
  width: 100%;
  max-width: var(--shell-width);
  margin: 0 auto;
  padding: 14px 20px 24px;
  border-top: 1px solid var(--c-line);
  color: var(--c-text-soft);
  font-size: 13px;
  line-height: 1.7;
}

/* --------------------------------------------------------------------------
   layout · 内页骨架
   -------------------------------------------------------------------------- */

.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 14px;
  color: var(--c-text-soft);
  font-size: 14px;
  line-height: 1.6;
}

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

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

.breadcrumb-current {
  color: var(--c-text-soft);
}

.page-header {
  max-width: var(--read-width);
  margin-bottom: 28px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--c-line);
}

.page-title {
  margin-bottom: 10px;
  color: var(--c-text);
  font-size: 28px;
  font-weight: 700;
  line-height: 1.35;
}

.page-description {
  color: var(--c-text-soft);
  font-size: 15px;
  line-height: 1.75;
}

.section {
  margin-bottom: 40px;
}

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

.section-head {
  max-width: var(--read-width);
  margin-bottom: 20px;
}

.section-head h2,
.section-title,
.inner-main > section > h2 {
  margin-bottom: 8px;
  color: var(--c-text);
  font-size: 22px;
  font-weight: 700;
  line-height: 1.4;
}

.section-desc,
.section-lead {
  max-width: var(--read-width);
  color: var(--c-text-soft);
  font-size: 15px;
  line-height: 1.75;
}

.section-title + .section-lead,
.inner-main > section > h2 + .section-lead {
  margin-bottom: 20px;
}

/* --------------------------------------------------------------------------
   components · 按钮与入口
   -------------------------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 20px;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.4;
  text-align: center;
  cursor: pointer;
}

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

.btn-primary {
  background-color: var(--c-primary);
  border-color: var(--c-primary);
  color: #ffffff;
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background-color: var(--c-primary-dark);
  border-color: var(--c-primary-dark);
  color: #ffffff;
}

.btn-ghost {
  background-color: var(--c-surface);
  border-color: var(--c-line-strong);
  color: var(--c-primary);
}

.btn-ghost:hover,
.btn-ghost:focus-visible {
  border-color: var(--c-primary);
  color: var(--c-primary-dark);
}

.channel-link,
.featured-link,
.piandan-entry {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  color: var(--c-primary);
  font-size: 15px;
  font-weight: 700;
}

.channel-link::after,
.featured-link::after,
.piandan-entry::after {
  content: "\2192";
  margin-left: 6px;
  font-weight: 400;
}

.fields-more a,
.path-more a,
.compare-note a,
.boundary-note a,
.recovery-foot a,
.matrix-note a {
  color: var(--c-primary);
  font-weight: 700;
}

/* --------------------------------------------------------------------------
   components · 图片容器
   -------------------------------------------------------------------------- */

.section-media,
.hero-media,
.channel-figure,
.media-figure,
.media-block {
  overflow: hidden;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background-color: var(--c-surface);
}

.section-media img,
.hero-media img,
.channel-figure img,
.media-figure img,
.media-block img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  background-color: var(--c-primary-soft);
}

.section-media figcaption,
.hero-media figcaption,
.channel-figure figcaption,
.media-figure figcaption,
.media-block figcaption {
  padding: 10px 14px 12px;
  margin-top: 0;
  border-top: 1px solid var(--c-line);
}

/* --------------------------------------------------------------------------
   components · 表格
   -------------------------------------------------------------------------- */

.table-scroll,
.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background-color: var(--c-surface);
  -webkit-overflow-scrolling: touch;
}

.field-table,
.compare-table {
  min-width: 560px;
  font-size: 14px;
}

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

.field-table thead th,
.compare-table thead th {
  padding: 11px 16px;
  background-color: var(--c-primary-soft);
  color: var(--c-primary);
  font-size: 13px;
  font-weight: 700;
  white-space: nowrap;
  border-bottom: 1px solid var(--c-line);
}

.field-table tbody th,
.compare-table tbody th {
  width: 22%;
  padding: 12px 16px;
  color: var(--c-text);
  font-size: 14px;
  font-weight: 700;
  background-color: #fbfcfe;
  border-bottom: 1px solid var(--c-line);
}

.field-table tbody td,
.compare-table tbody td {
  padding: 12px 16px;
  color: var(--c-text-soft);
  line-height: 1.7;
  border-bottom: 1px solid var(--c-line);
}

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

/* --------------------------------------------------------------------------
   pages · 首页
   -------------------------------------------------------------------------- */

.hero-section {
  margin-bottom: 40px;
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(280px, 0.95fr);
  align-items: center;
  gap: 32px;
  padding: 28px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background-color: var(--c-surface);
}

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

.hero-title {
  margin-bottom: 14px;
  color: var(--c-text);
  font-size: 28px;
  font-weight: 700;
  line-height: 1.35;
}

.hero-lead {
  max-width: 46ch;
  margin-bottom: 22px;
  color: var(--c-text-soft);
  font-size: 16px;
  line-height: 1.75;
}

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

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

.channel-overview {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 24px;
}

.channel-row {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(0, 1.2fr) auto;
  align-items: center;
  gap: 8px 20px;
  padding: 16px 18px;
  border: 1px solid var(--c-line);
  border-left: 3px solid var(--c-accent);
  border-radius: var(--radius);
  background-color: var(--c-surface);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.channel-row:hover {
  border-color: var(--c-line-strong);
  border-left-color: var(--c-primary);
  box-shadow: var(--shadow-card);
}

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

.channel-name {
  margin-bottom: 4px;
  color: var(--c-text);
  font-size: 18px;
  font-weight: 700;
}

.channel-trend,
.channel-scope {
  color: var(--c-text-soft);
  font-size: 14px;
  line-height: 1.7;
}

.channel-audience {
  min-width: 0;
  color: var(--c-text-soft);
  font-size: 14px;
  line-height: 1.7;
}

.channel-audience-label {
  margin-bottom: 2px;
  color: var(--c-primary);
  font-size: 13px;
  font-weight: 700;
}

.channel-link {
  justify-self: end;
  white-space: nowrap;
}

.featured-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.featured-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-width: 0;
  padding: 20px;
  border: 1px solid var(--c-line);
  border-top: 3px solid var(--c-accent);
  border-radius: var(--radius);
  background-color: var(--c-surface);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.featured-card:hover {
  border-color: var(--c-line-strong);
  box-shadow: var(--shadow-card);
}

.featured-name {
  color: var(--c-text);
  font-size: 18px;
  font-weight: 700;
}

.featured-scope {
  color: var(--c-text-soft);
  font-size: 14px;
  line-height: 1.7;
}

.featured-related {
  padding-top: 10px;
  border-top: 1px dashed var(--c-line);
  color: var(--c-text-soft);
  font-size: 14px;
  line-height: 1.7;
}

.featured-link {
  margin-top: auto;
}

.fields-more,
.path-more {
  margin-top: 14px;
  color: var(--c-text-soft);
  font-size: 15px;
}

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

.path-step {
  position: relative;
  min-width: 0;
  padding: 20px 20px 20px 22px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background-color: var(--c-surface);
}

.path-step::before {
  content: "";
  position: absolute;
  top: 20px;
  left: 0;
  width: 3px;
  height: 22px;
  border-radius: 0 3px 3px 0;
  background-color: var(--c-primary);
}

.path-step-name {
  margin-bottom: 8px;
  color: var(--c-text);
  font-size: 17px;
  font-weight: 700;
}

.path-step-result {
  color: var(--c-text-soft);
  font-size: 14px;
  line-height: 1.7;
}

.update-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin-bottom: 24px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background-color: var(--c-surface);
  overflow: hidden;
}

.update-row {
  display: grid;
  grid-template-columns: 108px 96px minmax(0, 1fr);
  align-items: baseline;
  gap: 6px 16px;
  padding: 14px 18px;
  border-bottom: 1px solid var(--c-line);
}

.update-row:last-child {
  border-bottom: 0;
}

.update-date {
  color: var(--c-text-soft);
  font-size: 14px;
  font-variant-numeric: tabular-nums;
}

.update-tag {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 999px;
  background-color: var(--c-accent-soft);
  color: #92400e;
  font-size: 13px;
  font-weight: 700;
  text-align: center;
  white-space: nowrap;
}

.update-text {
  min-width: 0;
  color: var(--c-text-soft);
  font-size: 14px;
  line-height: 1.7;
}

.feedback-block {
  padding: 20px 22px;
  border: 1px solid var(--c-line);
  border-left: 3px solid var(--c-primary);
  border-radius: var(--radius);
  background-color: var(--c-primary-soft);
}

.feedback-block h3 {
  margin-bottom: 8px;
  color: var(--c-primary-dark);
  font-size: 17px;
  font-weight: 700;
}

.feedback-block p {
  color: var(--c-text);
  font-size: 15px;
  line-height: 1.75;
}

.section-media-wide {
  margin-top: 32px;
}

/* --------------------------------------------------------------------------
   pages · 题材频道
   -------------------------------------------------------------------------- */

.channel-index > h2,
.channel-compare > h2,
.channel-organize > h2 {
  margin-bottom: 8px;
  font-size: 22px;
}

.channel-rows {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin: 20px 0 24px;
}

.channel-entry {
  display: flex;
  align-items: center;
  justify-self: end;
}

.channel-index .channel-row {
  grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr) auto;
}

.channel-audience .channel-audience-label {
  margin-bottom: 4px;
}

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

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

.compare-note {
  margin-top: 14px;
  color: var(--c-text-soft);
  font-size: 15px;
}

.channel-organize {
  margin-bottom: 0;
}

.organize-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: 20px;
}

.organize-item {
  min-width: 0;
  padding: 18px 20px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background-color: var(--c-surface);
}

.organize-item h3 {
  margin-bottom: 8px;
  color: var(--c-primary);
  font-size: 17px;
  font-weight: 700;
}

.organize-item p {
  color: var(--c-text-soft);
  font-size: 14px;
  line-height: 1.75;
}

/* --------------------------------------------------------------------------
   pages · 专题片单
   -------------------------------------------------------------------------- */

.piandan-list > h2,
.piandan-media > h2,
.piandan-scope > h2,
.piandan-relation > h2 {
  margin-bottom: 8px;
  font-size: 22px;
}

.piandan-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin: 20px 0 40px;
}

.piandan-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-width: 0;
  padding: 20px;
  border: 1px solid var(--c-line);
  border-top: 3px solid var(--c-primary);
  border-radius: var(--radius);
  background-color: var(--c-surface);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.piandan-card:hover {
  border-color: var(--c-line-strong);
  box-shadow: var(--shadow-card);
}

.piandan-name {
  color: var(--c-text);
  font-size: 18px;
  font-weight: 700;
}

.piandan-topic {
  color: var(--c-text-soft);
  font-size: 14px;
  line-height: 1.7;
}

.piandan-meta {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 4px 12px;
  padding-top: 12px;
  border-top: 1px dashed var(--c-line);
  font-size: 14px;
}

.piandan-meta dt {
  color: var(--c-primary);
  font-weight: 700;
}

.piandan-meta dd {
  margin: 0;
  color: var(--c-text-soft);
  line-height: 1.7;
}

.piandan-entry {
  margin-top: auto;
}

.piandan-media {
  margin-bottom: 40px;
}

.piandan-media > p,
.piandan-scope > p,
.piandan-relation > p {
  max-width: var(--read-width);
  margin-bottom: 16px;
  color: var(--c-text-soft);
  font-size: 15px;
  line-height: 1.75;
}

.scope-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-bottom: 16px;
}

.scope-list li {
  min-width: 0;
  padding: 14px 16px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background-color: var(--c-surface);
  color: var(--c-text-soft);
  font-size: 14px;
  line-height: 1.7;
}

.scope-list strong {
  display: block;
  margin-bottom: 4px;
  color: var(--c-text);
  font-size: 15px;
}

.piandan-scope {
  margin-bottom: 40px;
}

.piandan-relation {
  margin-bottom: 0;
}

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

.relation-step {
  position: relative;
  min-width: 0;
  padding: 18px 20px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background-color: var(--c-surface);
}

.relation-step h3 {
  margin-bottom: 8px;
  color: var(--c-primary);
  font-size: 17px;
  font-weight: 700;
}

.relation-step p {
  color: var(--c-text-soft);
  font-size: 14px;
  line-height: 1.75;
}

/* --------------------------------------------------------------------------
   pages · 条目字段说明
   -------------------------------------------------------------------------- */

.section-fields .media-block {
  margin: 20px 0 24px;
}

.section-fields .table-wrap {
  margin-bottom: 14px;
}

.table-note {
  color: var(--c-text-soft);
  font-size: 14px;
  line-height: 1.7;
}

.section-boundary {
  margin-top: 40px;
}

.boundary-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin: 20px 0 16px;
}

.boundary-card {
  min-width: 0;
  padding: 20px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background-color: var(--c-surface);
}

.boundary-in {
  border-top: 3px solid var(--c-primary);
}

.boundary-out {
  border-top: 3px solid var(--c-accent);
}

.card-title {
  margin-bottom: 12px;
  color: var(--c-text);
  font-size: 17px;
  font-weight: 700;
}

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

.boundary-list li {
  position: relative;
  padding-left: 16px;
  color: var(--c-text-soft);
  font-size: 14px;
  line-height: 1.75;
}

.boundary-list li::before {
  content: "";
  position: absolute;
  top: 10px;
  left: 0;
  width: 6px;
  height: 6px;
  border-radius: 2px;
  background-color: var(--c-line-strong);
}

.boundary-in .boundary-list li::before {
  background-color: var(--c-primary);
}

.boundary-out .boundary-list li::before {
  background-color: var(--c-accent);
}

.boundary-note {
  color: var(--c-text-soft);
  font-size: 15px;
}

.section-missing {
  margin-top: 40px;
}

.missing-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin: 20px 0 24px;
  counter-reset: missing;
}

.missing-item {
  min-width: 0;
  padding: 16px 20px 16px 52px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background-color: var(--c-surface);
  counter-increment: missing;
  position: relative;
}

.missing-item::before {
  content: counter(missing);
  position: absolute;
  top: 18px;
  left: 20px;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background-color: var(--c-primary-soft);
  color: var(--c-primary);
  font-size: 13px;
  font-weight: 700;
  line-height: 22px;
  text-align: center;
}

.item-title {
  margin-bottom: 6px;
  color: var(--c-text);
  font-size: 16px;
  font-weight: 700;
}

.missing-item p {
  color: var(--c-text-soft);
  font-size: 14px;
  line-height: 1.75;
}

.field-aside {
  padding: 20px 22px;
  border: 1px solid var(--c-line);
  border-left: 3px solid var(--c-accent);
  border-radius: var(--radius);
  background-color: var(--c-surface);
}

.aside-title {
  margin-bottom: 10px;
  color: var(--c-text);
  font-size: 16px;
  font-weight: 700;
}

.aside-links {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.aside-links li {
  font-size: 15px;
  line-height: 1.6;
}

/* --------------------------------------------------------------------------
   pages · 查阅路径
   -------------------------------------------------------------------------- */

.step-overview > h2,
.step-matrix > h2,
.step-recovery > h2 {
  margin-bottom: 8px;
  font-size: 22px;
}

.step-overview .media-figure {
  margin: 20px 0 24px;
}

.step-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  counter-reset: step;
}

.step-item {
  min-width: 0;
  counter-increment: step;
}

.step-card {
  position: relative;
  padding: 22px 24px 22px 68px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background-color: var(--c-surface);
}

.step-card::before {
  content: counter(step);
  position: absolute;
  top: 22px;
  left: 22px;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background-color: var(--c-primary);
  color: #ffffff;
  font-size: 15px;
  font-weight: 700;
  line-height: 30px;
  text-align: center;
}

.step-name {
  margin-bottom: 10px;
  color: var(--c-text);
  font-size: 18px;
  font-weight: 700;
}

.step-input,
.step-process,
.step-result {
  max-width: 68ch;
  color: var(--c-text-soft);
  font-size: 15px;
  line-height: 1.75;
}

.step-input {
  margin-bottom: 8px;
  color: var(--c-text);
}

.step-input::before {
  content: "输入条件：";
  color: var(--c-primary);
  font-weight: 700;
}

.step-process::before {
  content: "操作过程：";
  color: var(--c-primary);
  font-weight: 700;
}

.step-result::before {
  content: "预期结果：";
  color: var(--c-primary);
  font-weight: 700;
}

.step-result {
  margin-top: 8px;
  padding-top: 10px;
  border-top: 1px dashed var(--c-line);
}

.step-matrix {
  margin-top: 40px;
}

.matrix-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin: 20px 0 14px;
}

.matrix-col {
  min-width: 0;
  padding: 20px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background-color: var(--c-surface);
}

.matrix-head {
  margin-bottom: 12px;
  color: var(--c-primary);
  font-size: 17px;
  font-weight: 700;
}

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

.matrix-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  color: var(--c-text-soft);
  font-size: 14px;
  line-height: 1.7;
}

.matrix-step {
  flex: 0 0 auto;
  display: inline-block;
  min-width: 46px;
  padding: 2px 8px;
  border-radius: 4px;
  background-color: var(--c-accent-soft);
  color: #92400e;
  font-size: 12px;
  font-weight: 700;
  text-align: center;
}

.matrix-note {
  color: var(--c-text-soft);
  font-size: 15px;
}

.step-recovery {
  margin-top: 40px;
}

.recovery-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin: 20px 0 16px;
}

.recovery-item {
  min-width: 0;
  padding: 18px 20px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background-color: var(--c-surface);
}

.recovery-item h3 {
  margin-bottom: 8px;
  color: var(--c-text);
  font-size: 16px;
  font-weight: 700;
}

.recovery-item p {
  color: var(--c-text-soft);
  font-size: 14px;
  line-height: 1.75;
}

.recovery-foot {
  color: var(--c-text-soft);
  font-size: 15px;
}

/* --------------------------------------------------------------------------
   pages · 404
   -------------------------------------------------------------------------- */

.error-main {
  padding-top: 40px;
}

.error-block {
  max-width: var(--read-width);
  margin-bottom: 40px;
}

.error-code {
  margin-bottom: 8px;
  color: var(--c-accent);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.error-block h1 {
  margin-bottom: 12px;
  color: var(--c-text);
  font-size: 28px;
  font-weight: 700;
  line-height: 1.35;
}

.error-text {
  max-width: 62ch;
  color: var(--c-text-soft);
  font-size: 15px;
  line-height: 1.75;
}

.error-text + .error-text {
  margin-top: 8px;
}

.error-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.error-guide {
  max-width: var(--read-width);
  padding: 22px 24px;
  border: 1px solid var(--c-line);
  border-left: 3px solid var(--c-primary);
  border-radius: var(--radius);
  background-color: var(--c-surface);
}

.error-guide h2 {
  margin-bottom: 12px;
  color: var(--c-text);
  font-size: 20px;
  font-weight: 700;
}

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

.error-list li {
  font-size: 15px;
  line-height: 1.7;
}

/* --------------------------------------------------------------------------
   responsive
   -------------------------------------------------------------------------- */

@media (max-width: 1200px) {
  .footer-inner {
    grid-template-columns: minmax(200px, 1.4fr) repeat(3, minmax(130px, 1fr));
  }

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

@media (max-width: 900px) {
  .header-inner {
    padding: 10px 16px;
  }

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

  .site-nav {
    flex: 1 0 100%;
    order: 3;
  }

  .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    width: 100%;
    padding: 6px 0 4px;
    border-top: 1px solid var(--c-line);
  }

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

  .nav-list a {
    padding: 12px 4px;
    border-bottom: 1px solid var(--c-line);
    border-left: 3px solid transparent;
    font-size: 16px;
    white-space: normal;
  }

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

  .nav-list a:hover,
  .nav-list a:focus-visible {
    border-bottom-color: var(--c-line);
  }

  .nav-list a.is-current {
    border-bottom-color: var(--c-line);
    border-left-color: var(--c-primary);
    padding-left: 10px;
  }

  .site-main {
    padding: 20px 16px 40px;
  }

  .hero-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
    padding: 22px;
  }

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

  .featured-grid,
  .path-steps,
  .piandan-grid,
  .relation-flow {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .channel-row,
  .channel-index .channel-row {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 6px 16px;
  }

  .channel-main {
    grid-column: 1 / 2;
  }

  .channel-audience {
    grid-column: 1 / 2;
  }

  .channel-link,
  .channel-entry {
    grid-column: 2 / 3;
    grid-row: 1 / 2;
    align-self: start;
    justify-self: end;
  }

  .footer-inner {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px 20px;
    padding: 28px 16px 20px;
  }

  .footer-about,
  .footer-boundary {
    grid-column: 1 / -1;
  }

  .footer-bottom {
    padding: 14px 16px 24px;
  }
}

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

  .brand-name {
    font-size: 17px;
  }

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

  .page-title,
  .hero-title,
  .error-block h1 {
    font-size: 24px;
  }

  .section-head h2,
  .section-title,
  .inner-main > section > h2,
  .channel-index > h2,
  .channel-compare > h2,
  .channel-organize > h2,
  .piandan-list > h2,
  .piandan-media > h2,
  .piandan-scope > h2,
  .piandan-relation > h2,
  .step-overview > h2,
  .step-matrix > h2,
  .step-recovery > h2 {
    font-size: 20px;
  }

  .hero-inner {
    padding: 18px;
  }

  .hero-actions {
    gap: 10px;
  }

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

  .featured-grid,
  .path-steps,
  .piandan-grid,
  .relation-flow,
  .organize-grid,
  .scope-list,
  .boundary-grid,
  .matrix-grid,
  .recovery-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .channel-row,
  .channel-index .channel-row {
    grid-template-columns: minmax(0, 1fr);
    gap: 6px;
    padding: 14px 16px;
  }

  .channel-link,
  .channel-entry {
    grid-column: 1 / 2;
    grid-row: auto;
    justify-self: start;
  }

  .update-row {
    grid-template-columns: minmax(0, 1fr);
    gap: 4px;
    padding: 12px 16px;
  }

  .update-tag {
    justify-self: start;
  }

  .step-card {
    padding: 18px 18px 18px 58px;
  }

  .step-card::before {
    top: 18px;
    left: 16px;
    width: 26px;
    height: 26px;
    font-size: 14px;
    line-height: 26px;
  }

  .missing-item {
    padding: 14px 16px 14px 48px;
  }

  .missing-item::before {
    top: 16px;
    left: 16px;
  }

  .field-table,
  .compare-table {
    min-width: 480px;
  }

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

  .error-main {
    padding-top: 28px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
  }
}