/* ==========================================================================
   飘花电影 · 全站样式
   分组：base / layout / components / pages / responsive
   ========================================================================== */

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

:root {
  --bg: #f4f6f8;
  --panel: #ffffff;
  --ink: #1f2933;
  --ink-soft: #52606d;
  --line: #d9e2ec;
  --line-strong: #bcccdc;
  --accent: #2b6cb0;
  --accent-soft: #e8f0fa;
  --ok: #2f855a;
  --warn: #b7791f;
  --radius: 6px;
  --wrap: 1180px;
  --mono: ui-monospace, "SFMono-Regular", "Menlo", "Consolas", "Liberation Mono", monospace;
}

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

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

.site-body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 15px;
  line-height: 1.75;
}

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

.site-body p {
  margin: 0;
}

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

.site-body dl,
.site-body dd {
  margin: 0;
}

.site-body a {
  color: var(--accent);
  text-decoration: none;
}

.site-body a:hover {
  text-decoration: underline;
}

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

.site-body figure {
  margin: 0;
}

.site-body button {
  font: inherit;
  color: inherit;
}

.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
   -------------------------------------------------------------------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: var(--panel);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 24px;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 12px 24px;
}

.brand {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  min-height: 44px;
  padding-left: 12px;
  border-left: 3px solid var(--accent);
  font-size: 19px;
  font-weight: 600;
  color: var(--ink);
}

.brand:hover {
  color: var(--accent);
  text-decoration: none;
}

.nav-toggle {
  display: none;
  margin-left: auto;
  width: 44px;
  height: 44px;
  padding: 0;
  background: var(--panel);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  cursor: pointer;
}

.nav-toggle::before {
  content: "";
  display: block;
  width: 20px;
  height: 2px;
  margin: 0 auto;
  background: var(--ink);
  box-shadow: 0 -6px 0 var(--ink), 0 6px 0 var(--ink);
}

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

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

.nav-list a {
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 0 14px;
  border-radius: var(--radius);
  color: var(--ink-soft);
  font-size: 15px;
}

.nav-list a:hover {
  background: var(--accent-soft);
  color: var(--accent);
  text-decoration: none;
}

.nav-list a.is-current {
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 600;
}

.site-main {
  display: block;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 24px 56px;
}

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

.section {
  padding: 34px 0;
  border-top: 1px solid var(--line);
}

.section:first-child {
  border-top: 0;
}

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

.section-title {
  font-size: 22px;
  padding-left: 12px;
  border-left: 3px solid var(--accent);
}

.section-desc,
.section-intro {
  margin-top: 8px;
  max-width: 860px;
  color: var(--ink-soft);
  font-size: 15px;
}

.section-more {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  margin-top: 6px;
  font-size: 14px;
  font-weight: 600;
}

.section-more::after {
  content: "→";
  margin-left: 6px;
}

.section-note,
.section-tail {
  margin-top: 14px;
  color: var(--ink-soft);
  font-size: 13px;
}

.section-note a,
.section-tail a {
  margin-right: 14px;
}

/* 面包屑 + 页标题区 */

.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  padding: 14px 0 0;
  font-size: 13px;
  color: var(--ink-soft);
}

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

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

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

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

.page-header {
  padding: 16px 0 22px;
  margin-bottom: 6px;
  border-bottom: 1px solid var(--line);
}

.page-title {
  font-size: 34px;
  font-weight: 600;
}

.page-description {
  margin-top: 10px;
  max-width: 860px;
  color: var(--ink-soft);
}

/* 页脚 */

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

.footer-inner {
  display: grid;
  grid-template-columns: 1.4fr repeat(4, 1fr);
  gap: 28px;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 36px 24px 24px;
}

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

.footer-text {
  margin-top: 8px;
  color: var(--ink-soft);
  font-size: 13px;
}

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

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

.footer-list a {
  display: inline-block;
  min-height: 30px;
  color: var(--ink-soft);
  font-size: 13px;
}

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

.footer-copy {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 14px 24px 26px;
  border-top: 1px solid var(--line);
  color: var(--ink-soft);
  font-size: 13px;
}

/* --------------------------------------------------------------------------
   components · 通用组件
   -------------------------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 20px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 600;
}

.btn:hover {
  text-decoration: none;
}

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

.btn-primary:hover {
  background: #24598f;
}

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

.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* 编号与字段值统一等宽数字 */

.ch-num,
.pick-num,
.use-num,
.step-num,
.channel-code,
.card-code,
.map-col-code,
.stage-link-stage,
.scope-no,
.timeline-stage,
.pick-time,
.ch-time,
.channel-time,
.channel-scale {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
}

/* 通用卡片边线规则 */

.collection-card,
.record-group,
.channel-block,
.reason-item,
.aside-block,
.timeline-card,
.faq-item,
.next-item {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

/* 通用图片容器约束 */

.card-media,
.channel-media,
.hero-media,
.field-figure,
.license-figure,
.section-figure {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #eef2f6;
}

.card-media img,
.channel-media img,
.hero-media img,
.field-figure img,
.license-figure img,
.section-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* 通用表格 */

.pair-table,
.data-table,
.feedback-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--panel);
  font-size: 14px;
}

.pair-table caption,
.table-caption,
.data-table caption {
  padding: 0 0 10px;
  text-align: left;
  color: var(--ink-soft);
  font-size: 13px;
}

.pair-table th,
.pair-table td,
.data-table th,
.data-table td,
.feedback-table th,
.feedback-table td {
  padding: 12px 14px;
  border: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.pair-table thead th,
.data-table thead th,
.feedback-table thead th {
  background: #eef2f6;
  font-weight: 600;
}

.feedback-table tbody th {
  background: #f7f9fb;
  font-weight: 600;
}

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

.fact-bar {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 10px 24px;
  color: var(--ink-soft);
  font-size: 13px;
}

.hero {
  padding: 22px 0 34px;
  border-bottom: 1px solid var(--line);
}

.hero-inner {
  display: grid;
  grid-template-columns: 7fr 5fr;
  gap: 32px;
  align-items: start;
}

.hero-title {
  font-size: 34px;
  font-weight: 600;
}

.hero-text {
  margin-top: 12px;
  max-width: 640px;
  color: var(--ink-soft);
}

.hero-note {
  margin-top: 10px;
  max-width: 640px;
  color: var(--ink-soft);
  font-size: 13px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 20px;
}

.hero-media {
  margin-top: 24px;
  aspect-ratio: 16 / 9;
}

.hero-media figcaption {
  padding: 8px 12px;
  color: var(--ink-soft);
  font-size: 13px;
  background: var(--panel);
  border-top: 1px solid var(--line);
}

.hero-panel {
  padding: 20px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.panel-title {
  font-size: 15px;
  color: var(--ink-soft);
  font-weight: 600;
}

.panel-title + .use-filter,
.panel-title + .pick-list {
  margin-top: 10px;
}

.use-filter {
  display: grid;
  gap: 8px;
}

.use-item {
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: 4px 10px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.use-item.is-active {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.use-num {
  grid-row: span 2;
  color: var(--accent);
  font-size: 15px;
  font-weight: 600;
}

.use-name {
  font-weight: 600;
}

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

.pick-list {
  margin-top: 22px;
  border-top: 1px solid var(--line);
}

.pick-row {
  display: grid;
  grid-template-columns: 40px 1fr auto;
  gap: 4px 10px;
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
}

.pick-num {
  grid-row: span 2;
  color: var(--accent);
  font-weight: 600;
}

.pick-name {
  font-weight: 600;
}

.pick-meta {
  grid-column: 2;
  color: var(--ink-soft);
  font-size: 13px;
}

.pick-time {
  grid-row: span 2;
  align-self: center;
  color: var(--ink-soft);
  font-size: 13px;
}

/* 首页 · 频道分类总览 */

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

.channel-row {
  display: grid;
  grid-template-columns: 72px 180px 1fr 140px;
  gap: 12px;
  align-items: center;
  padding: 12px 10px;
  border-bottom: 1px solid var(--line);
}

.channel-row:hover {
  background: var(--panel);
  border-color: var(--line-strong);
}

.channel-list .ch-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 26px;
  padding: 0 8px;
  background: var(--accent-soft);
  color: var(--accent);
  border-radius: 4px;
  font-size: 13px;
}

.channel-list .ch-name {
  font-weight: 600;
}

.channel-list .ch-focus {
  color: var(--ink-soft);
  font-size: 14px;
}

.channel-list .ch-time {
  color: var(--ink-soft);
  font-size: 13px;
  text-align: right;
}

/* 首页 · 专题片单 */

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

.collection-card {
  overflow: hidden;
}

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

.collection-card .card-media {
  border: 0;
  border-bottom: 1px solid var(--line);
  border-radius: 0;
  aspect-ratio: 16 / 9;
}

.collection-card .card-title {
  padding: 14px 16px 0;
  font-size: 17px;
}

.collection-card .card-reason {
  padding: 6px 16px 0;
  color: var(--ink-soft);
  font-size: 14px;
}

.collection-card .card-channel {
  padding: 10px 16px 16px;
  color: var(--accent);
  font-size: 13px;
}

/* 首页 · 版本记录速览 */

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

.record-group {
  padding: 16px 18px;
}

.record-group .group-title {
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
  font-size: 16px;
}

.record-list {
  margin-top: 10px;
}

.record-item {
  position: relative;
  padding: 6px 0 6px 16px;
  color: var(--ink-soft);
  font-size: 14px;
}

.record-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 15px;
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
}

/* 首页 · 使用教程四步 */

.step-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.step-list .step-item {
  padding: 16px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-top: 3px solid var(--accent);
  border-radius: var(--radius);
}

.step-list .step-num {
  display: block;
  color: var(--accent);
  font-size: 15px;
  font-weight: 600;
}

.step-list .step-name {
  margin-top: 6px;
  font-size: 16px;
}

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

.step-list .step-result {
  margin-top: 8px;
  color: var(--ok);
  font-size: 13px;
}

/* 首页 · 许可说明摘要 */

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

.license-col {
  padding: 18px 20px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.license-col .col-title {
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
  font-size: 16px;
}

.boundary-list {
  margin-top: 10px;
}

.boundary-item {
  position: relative;
  padding: 6px 0 6px 16px;
  color: var(--ink-soft);
  font-size: 14px;
}

.boundary-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 15px;
  width: 6px;
  height: 6px;
  background: var(--warn);
  border-radius: 50%;
}

/* 首页 · 站内栏目索引 */

.index-list {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 12px;
}

.index-item a {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: 8px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  text-align: center;
  font-weight: 600;
}

.index-item a:hover {
  border-color: var(--accent);
  text-decoration: none;
}

/* --------------------------------------------------------------------------
   pages · 内页通用布局
   -------------------------------------------------------------------------- */

.page-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 32px;
  align-items: start;
  padding-top: 8px;
}

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

.layout-aside {
  display: grid;
  gap: 18px;
}

.aside-block {
  padding: 16px 18px;
}

.aside-block h2 {
  font-size: 15px;
}

.aside-block p {
  margin-top: 8px;
  color: var(--ink-soft);
  font-size: 14px;
}

.aside-links {
  margin-top: 10px;
}

.aside-links li + li {
  margin-top: 6px;
}

.aside-links a {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  font-size: 14px;
}

/* --------------------------------------------------------------------------
   pages · 频道分类
   -------------------------------------------------------------------------- */

.section-channels-overview .section-intro,
.section-channel-boundaries .section-intro,
.section-channel-collections .section-intro,
.section-timeline .section-intro,
.section-fielddiff .section-intro,
.section-stage-link .section-intro {
  margin-bottom: 16px;
}

.channel-rows {
  border-top: 1px solid var(--line);
}

.channel-rows .channel-row {
  grid-template-columns: 78px 170px 1fr 130px 140px;
}

.channel-rows .channel-code {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 26px;
  padding: 0 8px;
  background: var(--accent-soft);
  color: var(--accent);
  border-radius: 4px;
  font-size: 13px;
}

.channel-rows .channel-name {
  font-weight: 600;
}

.channel-rows .channel-desc {
  color: var(--ink-soft);
  font-size: 14px;
}

.channel-rows .channel-scale,
.channel-rows .channel-time {
  color: var(--ink-soft);
  font-size: 13px;
  text-align: right;
}

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

.channel-block {
  overflow: hidden;
}

.channel-block .channel-media {
  border: 0;
  border-bottom: 1px solid var(--line);
  border-radius: 0;
  aspect-ratio: 16 / 9;
}

.channel-block h3 {
  padding: 14px 16px 0;
  font-size: 16px;
}

.channel-block .channel-focus,
.channel-block .channel-exclude,
.channel-block .channel-check {
  padding: 6px 16px 0;
  color: var(--ink-soft);
  font-size: 14px;
}

.channel-block .channel-check {
  padding-bottom: 16px;
  color: var(--accent);
  font-size: 13px;
}

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

.collection-group + .collection-group {
  margin-top: 26px;
}

.collection-group .group-title {
  margin-bottom: 14px;
  padding-left: 12px;
  border-left: 3px solid var(--accent);
  font-size: 17px;
}

.section-collection-groups .collection-grid .collection-card .card-body {
  padding: 14px 16px 16px;
}

.section-collection-groups .card-code {
  color: var(--accent);
  font-size: 13px;
}

.section-collection-groups .card-name {
  margin-top: 4px;
  font-size: 16px;
  font-weight: 600;
}

.section-collection-groups .card-meta {
  margin-top: 6px;
  color: var(--ink-soft);
  font-size: 14px;
}

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

.reason-item {
  padding: 16px 18px;
}

.reason-item .reason-title {
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
  font-size: 16px;
}

.reason-fields {
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr);
  gap: 6px 14px;
  margin-top: 10px;
}

.reason-fields dt {
  color: var(--ink-soft);
  font-size: 13px;
}

.reason-fields dd {
  font-size: 14px;
}

.map-table {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.map-head,
.map-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 130px minmax(0, 1fr);
  gap: 12px;
  padding: 12px 16px;
}

.map-head {
  background: #eef2f6;
  font-weight: 600;
  font-size: 14px;
}

.map-list .map-row {
  border-top: 1px solid var(--line);
  font-size: 14px;
}

.map-row .map-col-theme {
  color: var(--ink-soft);
}

/* --------------------------------------------------------------------------
   pages · 版本记录
   -------------------------------------------------------------------------- */

.layout-shell {
  display: block;
}

.timeline {
  position: relative;
  display: grid;
  gap: 20px;
  padding-left: 26px;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 6px;
  bottom: 6px;
  width: 2px;
  background: var(--line);
}

.timeline-card {
  position: relative;
  display: grid;
  grid-template-columns: 0 minmax(0, 1fr);
}

.timeline-rail {
  position: absolute;
  left: -26px;
  top: 20px;
  width: 16px;
  height: 16px;
  background: var(--panel);
  border: 3px solid var(--accent);
  border-radius: 50%;
}

.timeline-body {
  padding: 16px 18px;
}

.timeline-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
}

.timeline-stage {
  font-size: 16px;
  font-weight: 600;
}

.timeline-meta {
  color: var(--ink-soft);
  font-size: 13px;
}

.timeline-list {
  margin-top: 10px;
}

.timeline-list li {
  position: relative;
  padding: 5px 0 5px 16px;
  color: var(--ink-soft);
  font-size: 14px;
}

.timeline-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 14px;
  width: 6px;
  height: 6px;
  background: var(--line-strong);
  border-radius: 50%;
}

.timeline-note {
  margin-top: 10px;
  color: var(--ink-soft);
  font-size: 13px;
}

.timeline-note .code {
  font-family: var(--mono);
  color: var(--accent);
}

.fielddiff-table td:first-child {
  width: 160px;
  font-weight: 600;
}

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

.stage-link-row {
  display: grid;
  grid-template-columns: 130px 150px minmax(0, 1fr) 110px;
  gap: 12px;
  align-items: center;
  padding: 12px 10px;
  border-bottom: 1px solid var(--line);
  font-size: 14px;
}

.stage-link-row:hover {
  background: var(--panel);
}

.stage-link-channels,
.stage-link-collection {
  color: var(--ink-soft);
}

.stage-link-status {
  justify-self: end;
  padding: 2px 10px;
  border-radius: 4px;
  font-size: 13px;
}

.status-done {
  background: #e6f4ec;
  color: var(--ok);
}

.status-checking {
  background: #fbf3e3;
  color: var(--warn);
}

.section-figure {
  margin-top: 26px;
  aspect-ratio: 21 / 9;
}

.section-figure figcaption {
  padding: 8px 12px;
  color: var(--ink-soft);
  font-size: 13px;
  background: var(--panel);
  border-top: 1px solid var(--line);
}

/* --------------------------------------------------------------------------
   pages · 使用教程
   -------------------------------------------------------------------------- */

.tutorial-steps .section-intro,
.field-guide .section-intro,
.faq-section .section-intro,
.next-links .section-intro {
  margin-bottom: 16px;
}

.step-track {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.step-track .step-item {
  padding: 16px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-top: 3px solid var(--accent);
  border-radius: var(--radius);
  scroll-margin-top: 90px;
}

.step-track .step-num {
  display: block;
  color: var(--accent);
  font-size: 15px;
  font-weight: 600;
}

.step-track .step-name {
  margin-top: 6px;
  font-size: 16px;
}

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

.step-track .step-result {
  margin-top: 8px;
  color: var(--ok);
  font-size: 13px;
}

.field-figure {
  aspect-ratio: 21 / 9;
  margin-bottom: 20px;
}

.field-figure figcaption {
  padding: 8px 12px;
  color: var(--ink-soft);
  font-size: 13px;
  background: var(--panel);
  border-top: 1px solid var(--line);
}

.field-table {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.field-row {
  display: grid;
  grid-template-columns: 140px minmax(0, 1fr) minmax(0, 1.2fr) minmax(0, 1fr);
  gap: 12px;
  padding: 12px 16px;
  border-top: 1px solid var(--line);
  font-size: 14px;
}

.field-row:first-child {
  border-top: 0;
}

.field-row-head {
  background: #eef2f6;
  font-weight: 600;
}

.field-cell {
  color: var(--ink-soft);
}

.field-row-head .field-cell {
  color: var(--ink);
}

.field-row .field-cell:first-child {
  color: var(--ink);
  font-weight: 600;
}

.faq-list {
  display: grid;
  gap: 10px;
}

.faq-item {
  padding: 0 18px;
}

.faq-item summary {
  display: flex;
  align-items: center;
  min-height: 48px;
  cursor: pointer;
  font-weight: 600;
  list-style: none;
}

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

.faq-item summary::after {
  content: "+";
  margin-left: auto;
  color: var(--accent);
  font-weight: 600;
}

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

.faq-item summary:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

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

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

.next-item {
  padding: 16px 18px;
}

.next-item a {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  font-weight: 600;
}

.next-item p {
  margin-top: 6px;
  color: var(--ink-soft);
  font-size: 14px;
}

/* --------------------------------------------------------------------------
   pages · 许可说明
   -------------------------------------------------------------------------- */

.license-scope .section-intro,
.license-usage .section-intro,
.license-feedback .section-intro {
  margin-bottom: 16px;
}

.scope-list {
  display: grid;
  gap: 14px;
}

.scope-item {
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr);
  gap: 4px 16px;
  padding: 16px 18px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius);
}

.scope-no {
  grid-row: span 3;
  color: var(--accent);
  font-size: 15px;
  font-weight: 600;
}

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

.scope-text,
.scope-apply {
  color: var(--ink-soft);
  font-size: 14px;
}

.scope-apply {
  color: var(--warn);
  font-size: 13px;
}

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

.usage-col {
  padding: 18px 20px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.usage-col-allow {
  border-top: 3px solid var(--ok);
}

.usage-col-check {
  border-top: 3px solid var(--warn);
}

.usage-col .usage-title {
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
  font-size: 16px;
}

.usage-list {
  margin-top: 10px;
}

.usage-list li {
  position: relative;
  padding: 6px 0 6px 16px;
  color: var(--ink-soft);
  font-size: 14px;
}

.usage-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 15px;
  width: 6px;
  height: 6px;
  background: var(--line-strong);
  border-radius: 50%;
}

.usage-col-allow .usage-list li::before {
  background: var(--ok);
}

.usage-col-check .usage-list li::before {
  background: var(--warn);
}

.license-figure {
  margin-top: 22px;
  aspect-ratio: 21 / 9;
}

.license-figure figcaption {
  padding: 8px 12px;
  color: var(--ink-soft);
  font-size: 13px;
  background: var(--panel);
  border-top: 1px solid var(--line);
}

.feedback-table th[scope="row"] {
  width: 180px;
}

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

.feedback-note a {
  margin-right: 14px;
}

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

.error-main {
  padding-top: 44px;
}

.error-panel {
  padding: 32px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-left: 4px solid var(--accent);
  border-radius: var(--radius);
}

.error-code {
  font-family: var(--mono);
  font-size: 40px;
  font-weight: 600;
  color: var(--accent);
  line-height: 1;
}

.error-title {
  margin-top: 12px;
  font-size: 26px;
}

.error-text {
  margin-top: 10px;
  max-width: 640px;
  color: var(--ink-soft);
}

.error-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 20px;
}

.error-guide {
  margin-top: 26px;
  padding: 22px 24px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.error-guide h2 {
  font-size: 18px;
}

.error-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px 20px;
  margin-top: 12px;
}

.error-list a {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  font-size: 15px;
}

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

@media (max-width: 1024px) {
  .hero-inner {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-layout {
    grid-template-columns: minmax(0, 1fr) 280px;
    gap: 26px;
  }

  .channel-rows .channel-row {
    grid-template-columns: 70px 150px minmax(0, 1fr) 120px;
  }

  .channel-rows .channel-scale {
    display: none;
  }

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

  .index-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .footer-inner {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 768px) {
  .header-inner {
    flex-wrap: wrap;
    gap: 12px;
    padding: 10px 18px;
  }

  .nav-toggle {
    display: block;
  }

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

  .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    padding-bottom: 8px;
    border-top: 1px solid var(--line);
  }

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

  .nav-list a {
    padding: 0 10px;
    font-size: 15px;
  }

  .site-main {
    padding: 0 18px 44px;
  }

  .fact-bar {
    padding: 10px 18px;
  }

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

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

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

  .collection-grid,
  .record-groups,
  .channel-blocks,
  .reason-list,
  .license-columns,
  .usage-columns,
  .next-list,
  .error-list {
    grid-template-columns: minmax(0, 1fr);
  }

  .channel-row,
  .channel-rows .channel-row {
    grid-template-columns: 64px minmax(0, 1fr);
    gap: 4px 12px;
    padding: 12px 8px;
  }

  .channel-list .ch-focus,
  .channel-rows .channel-desc {
    grid-column: 2;
  }

  .channel-list .ch-time,
  .channel-rows .channel-time {
    grid-column: 2;
    text-align: left;
  }

  .stage-link-row {
    grid-template-columns: minmax(0, 1fr) 110px;
    gap: 4px 12px;
  }

  .stage-link-collection {
    grid-column: 1;
  }

  .stage-link-status {
    grid-column: 2;
    grid-row: 1;
  }

  .field-row {
    grid-template-columns: 110px minmax(0, 1fr);
    gap: 4px 12px;
  }

  .field-row .field-cell:nth-child(3),
  .field-row .field-cell:nth-child(4) {
    grid-column: 2;
  }

  .reason-fields {
    grid-template-columns: 88px minmax(0, 1fr);
  }

  .map-head,
  .map-row {
    grid-template-columns: minmax(0, 1fr) 96px;
  }

  .map-col-theme {
    grid-column: 1 / -1;
  }

  .pair-table,
  .data-table,
  .feedback-table {
    display: block;
    overflow-x: auto;
    white-space: nowrap;
  }

  .footer-inner {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px;
    padding: 28px 18px 18px;
  }

  .footer-copy {
    padding: 12px 18px 22px;
  }

  .scope-item {
    grid-template-columns: 52px minmax(0, 1fr);
  }
}

@media (max-width: 480px) {
  .site-main {
    padding: 0 14px 40px;
  }

  .fact-bar {
    padding: 8px 14px;
  }

  .header-inner {
    padding: 8px 14px;
  }

  .brand {
    font-size: 17px;
  }

  .hero {
    padding: 16px 0 26px;
  }

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

  .step-list,
  .step-track,
  .index-list {
    grid-template-columns: minmax(0, 1fr);
  }

  .pick-row {
    grid-template-columns: 34px minmax(0, 1fr);
  }

  .pick-time {
    grid-column: 2;
    grid-row: auto;
    text-align: left;
  }

  .use-item {
    grid-template-columns: 34px minmax(0, 1fr);
  }

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

  .error-panel {
    padding: 22px 18px;
  }

  .error-code {
    font-size: 32px;
  }

  .error-title {
    font-size: 21px;
  }

  .timeline {
    padding-left: 20px;
  }

  .timeline-rail {
    left: -20px;
    width: 13px;
    height: 13px;
    border-width: 2px;
  }
}