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

/* --------------------------------------------------------------------------
   base · 变量与重置
   -------------------------------------------------------------------------- */
:root {
  --color-bg: #ffffff;
  --color-bg-soft: #f5f6f8;
  --color-primary: #1f3a5f;
  --color-secondary: #3d6ea8;
  --color-line: #e8ebf0;
  --color-text: #2b3440;
  --color-muted: #5a6472;
  --color-ok: #2f7a55;
  --color-warn: #b5473a;
  --radius: 6px;
  --shell: 1120px;
  --shadow-soft: 0 1px 2px rgba(31, 58, 95, 0.06);
}

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

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

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  color: var(--color-text);
  background-color: var(--color-bg);
}

h1,
h2,
h3,
h4 {
  margin: 0;
  font-weight: 600;
  color: var(--color-primary);
  line-height: 1.4;
}

p {
  margin: 0;
}

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

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

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

a:hover,
a:focus-visible {
  text-decoration: underline;
}

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

button {
  font: inherit;
  color: inherit;
}

:focus-visible {
  outline: 2px solid var(--color-secondary);
  outline-offset: 2px;
}

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

/* --------------------------------------------------------------------------
   layout · 全站骨架：页头 / 主导航 / 主容器 / 页脚
   -------------------------------------------------------------------------- */
.site-body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  font-size: 16px;
  color: var(--color-text);
  background-color: var(--color-bg);
}

.site-header {
  position: relative;
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-line);
}

.header-inner {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 20px;
  min-height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  font-size: 19px;
  font-weight: 600;
  color: var(--color-primary);
  white-space: nowrap;
}

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

.site-nav {
  flex: 1 1 auto;
  display: flex;
  justify-content: flex-end;
}

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

.nav-link {
  display: block;
  padding: 10px 14px;
  font-size: 15px;
  color: var(--color-text);
  border-bottom: 2px solid transparent;
  white-space: nowrap;
}

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--color-secondary);
  text-decoration: none;
  border-bottom-color: var(--color-line);
}

.nav-link.is-current {
  color: var(--color-primary);
  font-weight: 600;
  border-bottom-color: var(--color-primary);
}

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

.nav-toggle-bar {
  display: block;
  width: 18px;
  height: 2px;
  background-color: var(--color-primary);
}

.site-main {
  flex: 1 0 auto;
  display: block;
}

.home-main {
  padding-bottom: 48px;
}

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

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

.footer-inner {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 36px 20px 24px;
  display: grid;
  grid-template-columns: minmax(220px, 1fr) minmax(0, 2.2fr);
  gap: 32px;
}

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

.footer-name {
  font-size: 17px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 8px;
}

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

.footer-groups {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
}

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

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

.footer-list a {
  display: inline-block;
  font-size: 14px;
  color: var(--color-muted);
  padding: 2px 0;
}

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

.footer-bottom {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 14px 20px 28px;
  border-top: 1px solid var(--color-line);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px;
}

.footer-note,
.footer-copy {
  font-size: 13px;
  color: var(--color-muted);
}

/* --------------------------------------------------------------------------
   layout · 内页主容器 / 面包屑 / 页标题区
   -------------------------------------------------------------------------- */
.page-layout {
  max-width: var(--shell);
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  gap: 36px;
  align-items: start;
}

.layout-main,
.content-main {
  min-width: 0;
}

.layout-aside,
.page-sidebar,
.content-side {
  min-width: 0;
}

.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  font-size: 14px;
  color: var(--color-muted);
  margin-bottom: 14px;
}

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

.breadcrumb a:hover,
.breadcrumb a:focus-visible {
  color: var(--color-secondary);
}

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

.breadcrumb-current {
  color: var(--color-primary);
  font-weight: 600;
}

.page-header {
  padding-bottom: 20px;
  margin-bottom: 28px;
  border-bottom: 1px solid var(--color-line);
}

.page-title {
  font-size: 32px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 12px;
}

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

/* --------------------------------------------------------------------------
   components · 按钮 / 文本链接 / 表格
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 20px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
}

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

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

.btn-primary:hover,
.btn-primary:focus-visible {
  background-color: #16293f;
  border-color: #16293f;
  color: #ffffff;
}

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

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

.text-link {
  display: inline-block;
  font-size: 15px;
  color: var(--color-secondary);
  padding: 4px 0;
}

.text-link::after {
  content: " →";
}

.text-link:hover,
.text-link:focus-visible {
  color: var(--color-primary);
}

.table-wrap {
  width: 100%;
  overflow-x: auto;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background-color: var(--color-bg);
}

.data-table {
  width: 100%;
  font-size: 14px;
  min-width: 520px;
}

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

.data-table thead th {
  text-align: left;
  padding: 12px 16px;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-primary);
  background-color: var(--color-bg-soft);
  border-bottom: 1px solid var(--color-line);
  white-space: nowrap;
}

.data-table tbody th,
.data-table tbody td {
  padding: 12px 16px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--color-line);
  color: var(--color-text);
  line-height: 1.7;
}

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

.data-table tbody th {
  font-weight: 600;
  color: var(--color-primary);
  white-space: nowrap;
}

.data-table tbody tr:hover {
  background-color: #fafbfc;
}

/* --------------------------------------------------------------------------
   components · 通用区块 / 区块头 / 图片容器
   -------------------------------------------------------------------------- */
.section {
  padding: 40px 0;
  border-top: 1px solid var(--color-line);
}

.section-head {
  margin-bottom: 20px;
}

.section-title {
  font-size: 22px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 10px;
}

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

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

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

.section-media img,
.media-figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.section-media figcaption,
.media-figure figcaption {
  padding: 10px 14px;
  font-size: 13px;
  color: var(--color-muted);
  background-color: var(--color-bg);
  border-top: 1px solid var(--color-line);
}

.section-more {
  margin-top: 18px;
}

.section-footnote,
.section-note,
.section-foot {
  margin-top: 16px;
  font-size: 14px;
  color: var(--color-muted);
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

/* --------------------------------------------------------------------------
   components · 侧栏区块
   -------------------------------------------------------------------------- */
.aside-block,
.sidebar-block,
.side-block {
  padding: 18px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background-color: var(--color-bg-soft);
}

.aside-block + .aside-block,
.sidebar-block + .sidebar-block,
.side-block + .side-block {
  margin-top: 20px;
}

.aside-title,
.sidebar-title,
.side-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.side-desc {
  font-size: 14px;
  color: var(--color-muted);
  margin-bottom: 12px;
}

.aside-list li + li,
.sidebar-list li + li {
  margin-top: 8px;
}

.aside-list a,
.sidebar-list a {
  display: inline-block;
  font-size: 14px;
  color: var(--color-secondary);
  padding: 3px 0;
}

.aside-list a:hover,
.aside-list a:focus-visible,
.sidebar-list a:hover,
.sidebar-list a:focus-visible {
  color: var(--color-primary);
}

/* --------------------------------------------------------------------------
   components · 编号步骤（首页与指引页共用，按父级限定）
   -------------------------------------------------------------------------- */
.step-list {
  display: grid;
  gap: 16px;
}

.section-guide .step-item {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 14px;
  padding: 16px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background-color: var(--color-bg);
}

.section-guide .step-num {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  font-size: 15px;
  font-weight: 600;
  color: #ffffff;
  background-color: var(--color-primary);
  border-radius: var(--radius);
}

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

.step-title {
  font-size: 17px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 6px;
}

.step-action {
  font-size: 15px;
  color: var(--color-text);
  margin-bottom: 4px;
}

.step-result {
  font-size: 14px;
  color: var(--color-muted);
}

/* --------------------------------------------------------------------------
   pages · 首页
   -------------------------------------------------------------------------- */
.home-main > .section,
.home-main > .hero-section {
  max-width: var(--shell);
  margin: 0 auto;
  padding-left: 20px;
  padding-right: 20px;
}

.hero-section {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 36px;
  align-items: center;
  padding-top: 44px;
  padding-bottom: 40px;
}

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

.hero-title {
  font-size: 32px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 14px;
}

.hero-lead {
  font-size: 16px;
  color: var(--color-muted);
  margin-bottom: 22px;
  max-width: 520px;
}

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

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

.hero-media img {
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.hero-media figcaption {
  padding: 10px 14px;
  font-size: 13px;
  color: var(--color-muted);
  background-color: var(--color-bg);
  border-top: 1px solid var(--color-line);
}

.playlist-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.playlist-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 18px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background-color: var(--color-bg);
}

.playlist-card:hover {
  border-color: var(--color-secondary);
}

.section-playlists .playlist-name {
  font-size: 17px;
  font-weight: 600;
  color: var(--color-primary);
}

.section-playlists .playlist-scope,
.section-playlists .playlist-order,
.section-playlists .playlist-source {
  font-size: 14px;
  color: var(--color-muted);
}

.section-playlists .playlist-source {
  color: var(--color-primary);
}

.records-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
  gap: 32px;
  align-items: start;
}

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

.record-list {
  margin-top: 16px;
  border-top: 1px solid var(--color-line);
}

.record-item {
  display: grid;
  grid-template-columns: 120px minmax(0, 1fr);
  gap: 14px;
  padding: 12px 0;
  border-bottom: 1px solid var(--color-line);
}

.record-date {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 13px;
  color: var(--color-muted);
}

.record-text {
  font-size: 15px;
  color: var(--color-text);
}

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

.feedback-text {
  font-size: 15px;
  color: var(--color-muted);
  margin-bottom: 14px;
}

.feedback-list li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  color: var(--color-text);
}

.feedback-list li + li {
  margin-top: 8px;
}

.feedback-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--color-secondary);
}

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

/* --------------------------------------------------------------------------
   pages · 公告横幅
   -------------------------------------------------------------------------- */
.notice-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  max-width: var(--shell);
  margin: 14px auto 0;
  padding: 10px 16px;
  border: 1px solid var(--color-line);
  border-left: 3px solid var(--color-secondary);
  border-radius: var(--radius);
  background-color: var(--color-bg-soft);
}

.notice-text {
  font-size: 14px;
  color: var(--color-muted);
}

.notice-close {
  flex: 0 0 auto;
  width: 32px;
  height: 32px;
  padding: 0;
  font-size: 16px;
  line-height: 1;
  color: var(--color-muted);
  background-color: transparent;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  cursor: pointer;
}

.notice-close:hover,
.notice-close:focus-visible {
  color: var(--color-primary);
  border-color: var(--color-secondary);
}

.notice-banner.is-hidden {
  display: none;
}

/* --------------------------------------------------------------------------
   pages · 频道分类
   -------------------------------------------------------------------------- */
.content-section {
  padding: 32px 0;
  border-top: 1px solid var(--color-line);
}

.content-section:first-of-type {
  padding-top: 0;
  border-top: 0;
}

.channel-table-section h2,
.channel-pick-section h2,
.channel-map-section h2 {
  font-size: 22px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 10px;
}

.pick-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.pick-item {
  padding: 18px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background-color: var(--color-bg);
}

.pick-item h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.pick-item p {
  font-size: 14px;
  color: var(--color-muted);
}

.misread-block {
  margin-top: 22px;
  padding: 18px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background-color: var(--color-bg-soft);
}

.misread-block h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 10px;
}

.misread-list li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  color: var(--color-text);
}

.misread-list li + li {
  margin-top: 8px;
}

.misread-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 8px;
  height: 2px;
  background-color: var(--color-warn);
}

/* --------------------------------------------------------------------------
   pages · 专题片单
   -------------------------------------------------------------------------- */
.page-content {
  min-width: 0;
}

.playlist-detail {
  padding: 20px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background-color: var(--color-bg);
}

.playlist-detail + .playlist-detail {
  margin-top: 18px;
}

.section-playlist-list .playlist-name {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.playlist-detail p {
  font-size: 15px;
  color: var(--color-text);
}

.playlist-detail p + p {
  margin-top: 8px;
}

.field-label {
  display: inline-block;
  min-width: 76px;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-muted);
}

.playlist-media {
  margin-top: 22px;
}

.basis-block {
  padding: 18px;
  border-left: 3px solid var(--color-secondary);
  background-color: var(--color-bg-soft);
  border-radius: 0 var(--radius) var(--radius) 0;
}

.basis-block + .basis-block {
  margin-top: 16px;
}

.basis-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.basis-text {
  font-size: 15px;
  color: var(--color-text);
}

.playlist-map-table {
  min-width: 480px;
}

/* --------------------------------------------------------------------------
   pages · 条目字段说明
   -------------------------------------------------------------------------- */
.field-figure {
  margin-bottom: 22px;
}

.read-block {
  padding: 18px 0;
  border-top: 1px solid var(--color-line);
}

.section-field-read .read-block:first-of-type {
  border-top: 0;
  padding-top: 0;
}

.read-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.read-block p {
  font-size: 15px;
  color: var(--color-text);
}

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

.scope-column {
  padding: 18px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background-color: var(--color-bg);
}

.scope-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 12px;
}

.scope-include .scope-title {
  color: var(--color-ok);
}

.scope-exclude .scope-title {
  color: var(--color-warn);
}

.scope-list li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  color: var(--color-text);
}

.scope-list li + li {
  margin-top: 8px;
}

.scope-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 8px;
  height: 2px;
  background-color: var(--color-line);
}

.scope-include .scope-list li::before {
  background-color: var(--color-ok);
}

.scope-exclude .scope-list li::before {
  background-color: var(--color-warn);
}

/* --------------------------------------------------------------------------
   pages · 观看路径指引
   -------------------------------------------------------------------------- */
.guide-section {
  padding: 32px 0;
  border-top: 1px solid var(--color-line);
}

.guide-section:first-of-type {
  padding-top: 0;
  border-top: 0;
}

.guide-section h2 {
  font-size: 22px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 10px;
}

.check-list li {
  position: relative;
  padding-left: 24px;
  font-size: 15px;
  color: var(--color-text);
}

.check-list li + li {
  margin-top: 10px;
}

.check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 7px;
  width: 12px;
  height: 12px;
  border: 2px solid var(--color-secondary);
  border-radius: 3px;
}

.guide-figure {
  margin-top: 22px;
}

.guide-steps .step-item {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 14px;
  padding: 16px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background-color: var(--color-bg);
}

.guide-steps .step-no {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  font-size: 15px;
  font-weight: 600;
  color: #ffffff;
  background-color: var(--color-primary);
  border-radius: var(--radius);
}

.guide-steps .step-title {
  font-size: 17px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 6px;
}

.guide-steps .step-action {
  font-size: 15px;
  color: var(--color-text);
  margin-bottom: 4px;
}

.guide-steps .step-result {
  font-size: 14px;
  color: var(--color-muted);
}

.guide-steps .step-tip {
  margin-top: 8px;
  padding: 8px 12px;
  font-size: 13px;
  color: var(--color-muted);
  background-color: var(--color-bg-soft);
  border-left: 2px solid var(--color-line);
  border-radius: 0 var(--radius) var(--radius) 0;
}

.link-list li + li {
  margin-top: 8px;
}

.link-list a {
  display: inline-block;
  font-size: 14px;
  color: var(--color-secondary);
  padding: 3px 0;
}

.faq-section {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 36px 20px 48px;
  border-top: 1px solid var(--color-line);
}

.faq-section h2 {
  font-size: 22px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 10px;
}

.faq-list {
  margin-top: 18px;
  border-top: 1px solid var(--color-line);
}

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

.faq-question {
  padding: 16px 32px 16px 0;
  font-size: 16px;
  font-weight: 600;
  color: var(--color-primary);
  cursor: pointer;
  list-style: none;
  position: relative;
}

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

.faq-question::after {
  content: "+";
  position: absolute;
  right: 4px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 18px;
  color: var(--color-secondary);
}

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

.faq-question:hover,
.faq-question:focus-visible {
  color: var(--color-secondary);
}

.faq-answer {
  padding: 0 0 18px;
  font-size: 15px;
  color: var(--color-muted);
  max-width: 720px;
}

/* --------------------------------------------------------------------------
   pages · 404
   -------------------------------------------------------------------------- */
.error-main {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 56px 20px 64px;
}

.error-panel {
  padding: 36px 24px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background-color: var(--color-bg-soft);
  text-align: center;
}

.error-code {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 44px;
  font-weight: 600;
  color: var(--color-primary);
  line-height: 1.2;
  margin-bottom: 10px;
}

.error-panel h1 {
  font-size: 24px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.error-text {
  font-size: 15px;
  color: var(--color-muted);
  max-width: 560px;
  margin: 0 auto 24px;
}

.error-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
}

.error-hints {
  margin-top: 36px;
}

.error-hints h2 {
  font-size: 20px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 14px;
}

.error-hint-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.error-hint-list a {
  display: block;
  padding: 14px 16px;
  font-size: 15px;
  color: var(--color-primary);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background-color: var(--color-bg);
}

.error-hint-list a:hover,
.error-hint-list a:focus-visible {
  border-color: var(--color-secondary);
  color: var(--color-secondary);
  text-decoration: none;
}

/* --------------------------------------------------------------------------
   responsive · 断点 900px / 768px / 480px
   -------------------------------------------------------------------------- */
@media (max-width: 900px) {
  .footer-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
  }

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

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

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

@media (max-width: 768px) {
  .header-inner {
    flex-wrap: wrap;
    min-height: 56px;
    padding: 8px 16px;
  }

  .site-nav {
    flex: 0 0 auto;
    position: relative;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-list {
    display: none;
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    z-index: 20;
    width: 220px;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px;
    background-color: var(--color-bg);
    border: 1px solid var(--color-line);
    border-radius: var(--radius);
    box-shadow: 0 6px 18px rgba(31, 58, 95, 0.12);
  }

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

  .nav-link {
    padding: 12px 14px;
    border-bottom: 0;
    border-radius: var(--radius);
  }

  .nav-link:hover,
  .nav-link:focus-visible {
    background-color: var(--color-bg-soft);
    border-bottom-color: transparent;
  }

  .nav-link.is-current {
    background-color: var(--color-bg-soft);
    border-bottom-color: transparent;
  }

  .inner-main {
    padding: 16px 16px 44px;
  }

  .page-layout {
    grid-template-columns: minmax(0, 1fr);
    gap: 28px;
  }

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

  .hero-section {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
    padding-top: 28px;
    padding-bottom: 32px;
  }

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

  .home-main > .section,
  .home-main > .hero-section {
    padding-left: 16px;
    padding-right: 16px;
  }

  .notice-banner {
    margin: 12px 16px 0;
  }

  .section {
    padding: 32px 0;
  }

  .section-title {
    font-size: 20px;
  }

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

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

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

  .table-wrap {
    overflow-x: visible;
    border: 0;
    border-radius: 0;
    background-color: transparent;
  }

  .data-table {
    min-width: 0;
    font-size: 14px;
  }

  .data-table thead {
    position: absolute;
    width: 1px;
    height: 1px;
    margin: -1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
  }

  .data-table tbody tr {
    display: block;
    padding: 14px 16px;
    border: 1px solid var(--color-line);
    border-radius: var(--radius);
    background-color: var(--color-bg);
  }

  .data-table tbody tr + tr {
    margin-top: 12px;
  }

  .data-table tbody th,
  .data-table tbody td {
    display: block;
    padding: 0;
    border-bottom: 0;
    white-space: normal;
  }

  .data-table tbody th {
    font-size: 16px;
    margin-bottom: 8px;
  }

  .data-table tbody td + td {
    margin-top: 6px;
  }

  .table-caption {
    padding: 0 0 12px;
    border-bottom: 0;
  }

  .faq-section {
    padding: 32px 16px 40px;
  }

  .error-main {
    padding: 40px 16px 48px;
  }

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

@media (max-width: 480px) {
  .brand {
    font-size: 17px;
  }

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

  .hero-actions .btn {
    width: 100%;
  }

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

  .footer-bottom {
    flex-direction: column;
  }

  .section-guide .step-item,
  .guide-steps .step-item {
    grid-template-columns: minmax(0, 1fr);
  }

  .field-label {
    display: block;
    min-width: 0;
  }

  .error-code {
    font-size: 36px;
  }
}