/* ==========================================================================
   咻咻漫画 — 全站样式表
   分组：base / layout / components / pages / responsive
   ========================================================================== */

/* --------------------------------------------------------------------------
   base — 变量、重置、排版基线
   -------------------------------------------------------------------------- */
:root {
  --bg: #F6F8F7;
  --ink: #22302E;
  --ink-soft: #5F706C;
  --primary: #2E6B63;
  --primary-soft: #E3EFEC;
  --accent: #E4705A;
  --accent-soft: #FBE8E2;
  --line: #DBE5E2;
  --dark: #1F3A36;
  --radius: 8px;
  --radius-sm: 6px;
  --shell: 1180px;
  --read: 760px;
  --gap: 24px;
}

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

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  font-size: 16px;
  line-height: 1.85;
}

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

p {
  margin: 0;
}

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

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

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

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

figure {
  margin: 0;
}

button {
  font: inherit;
  color: inherit;
  cursor: pointer;
}

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

/* --------------------------------------------------------------------------
   layout — 容器、页头、页脚、主内容骨架
   -------------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 20px;
}

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

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 64px;
}

.brand {
  font-size: 20px;
  font-weight: 700;
  color: var(--primary);
  white-space: nowrap;
}

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

.site-nav ul {
  display: flex;
  align-items: center;
  gap: 22px;
}

.site-nav a {
  display: inline-block;
  padding: 8px 0;
  font-size: 15px;
  color: var(--ink);
  border-bottom: 2px solid transparent;
}

.site-nav a:hover {
  color: var(--primary);
}

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

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 0;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
}

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

.site-main {
  display: block;
}

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

.breadcrumb {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 18px 20px 0;
  font-size: 14px;
  color: var(--ink-soft);
}

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

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

.breadcrumb-sep {
  margin: 0 6px;
  color: var(--line);
}

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

.page-header {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 14px 20px 0;
}

.page-title {
  font-size: clamp(24px, 3.4vw, 34px);
  font-weight: 600;
  color: var(--ink);
}

.page-head {
  padding: 14px 0 8px;
}

.page-head-inner {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.page-head-back,
.back-link {
  font-size: 14px;
  color: var(--primary);
}

.page-head-back a,
.back-link {
  color: var(--primary);
}

.page-head-back a:hover,
.back-link:hover {
  color: var(--accent);
}

.page-lead,
.page-head-lead {
  max-width: var(--read);
  font-size: 16px;
  color: var(--ink-soft);
}

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

.section-title,
.section-head h2 {
  font-size: 22px;
  font-weight: 600;
  color: var(--ink);
}

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

.section-more {
  margin-top: 18px;
  font-size: 15px;
}

.text-link {
  color: var(--primary);
  border-bottom: 1px solid var(--line);
  padding-bottom: 2px;
}

.text-link:hover {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.site-footer {
  margin-top: 56px;
  background: var(--dark);
  color: #D6E3E0;
  padding: 44px 0 24px;
}

.footer-inner {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 32px;
}

.footer-title {
  font-size: 15px;
  font-weight: 600;
  color: #FFFFFF;
  margin-bottom: 12px;
}

.footer-logo {
  font-size: 18px;
  font-weight: 700;
  color: #FFFFFF;
  margin-bottom: 10px;
}

.footer-text {
  font-size: 14px;
  line-height: 1.8;
  color: #B8CBC7;
}

.footer-nav ul,
.footer-help ul {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-nav a,
.footer-help a {
  font-size: 14px;
  color: #B8CBC7;
}

.footer-nav a:hover,
.footer-help a:hover {
  color: #FFFFFF;
}

.footer-copyright {
  margin-top: 16px;
  font-size: 13px;
  color: #8FA8A3;
}

/* --------------------------------------------------------------------------
   components — 通用按钮、标签、卡片、列表、徽标
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 22px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  border: 1px solid transparent;
  transition: transform .18s ease, border-color .18s ease, background-color .18s ease;
}

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

.btn-primary:hover {
  background: #245A53;
  color: #FFFFFF;
  transform: translateY(-2px);
}

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

.btn-ghost:hover {
  background: var(--primary-soft);
  color: var(--primary);
  transform: translateY(-2px);
}

.status-badge,
.status-ongoing,
.status-paused,
.status-finished,
.status-completed {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 999px;
  font-size: 13px;
  line-height: 1.6;
  white-space: nowrap;
}

.status-ongoing,
.status-badge.is-ongoing {
  background: var(--accent-soft);
  color: #A63F2B;
}

.status-paused,
.status-badge.is-hiatus {
  background: #EEF1F0;
  color: var(--ink-soft);
}

.status-finished,
.status-completed,
.status-badge.is-completed {
  background: var(--primary-soft);
  color: var(--primary);
}

.status-badge.is-new {
  background: var(--accent);
  color: #FFFFFF;
}

.cover-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(190px, 1fr));
  gap: 20px;
}

.cover-card {
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform .18s ease, border-color .18s ease;
}

.cover-card:hover {
  transform: translateY(-3px);
  border-color: var(--primary);
}

.cover-card a {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 12px;
  color: inherit;
}

.cover-card img,
.cover-card-img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  border-radius: var(--radius-sm);
  background: var(--primary-soft);
}

.cover-name,
.cover-card-name {
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
}

.cover-topic,
.cover-card-topic {
  font-size: 13px;
  color: var(--ink-soft);
}

.cover-status,
.cover-card .status-badge {
  align-self: flex-start;
}

.related-links {
  padding: 44px 0 8px;
}

.related-link-list,
.related-grid,
.entry-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.related-link-card a,
.related-card,
.entry-card {
  display: block;
  height: 100%;
  padding: 20px;
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: inherit;
  transition: transform .18s ease, border-color .18s ease;
}

.related-link-card a:hover,
.related-card:hover,
.entry-card:hover {
  transform: translateY(-3px);
  border-color: var(--primary);
}

.related-link-name,
.related-card h3,
.related-card-title,
.entry-title {
  display: block;
  font-size: 17px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 8px;
}

.related-link-desc,
.related-card p,
.related-card-text,
.entry-desc {
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-soft);
}

/* --------------------------------------------------------------------------
   pages — 首页
   -------------------------------------------------------------------------- */
.home-main {
  padding-bottom: 8px;
}

.notice-banner {
  background: var(--dark);
  color: #D6E3E0;
}

.notice-inner {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 20px;
  flex-wrap: wrap;
}

.notice-text {
  font-size: 14px;
  flex: 1 1 320px;
}

.notice-link {
  font-size: 14px;
  color: #FFFFFF;
  border-bottom: 1px solid rgba(255, 255, 255, .5);
}

.notice-link:hover {
  color: var(--accent-soft);
}

.notice-close {
  width: 32px;
  height: 32px;
  border: 1px solid rgba(255, 255, 255, .35);
  border-radius: var(--radius-sm);
  background: transparent;
  color: #FFFFFF;
  font-size: 16px;
  line-height: 1;
}

.notice-close:hover {
  background: rgba(255, 255, 255, .12);
}

.hero {
  padding: 40px 0 12px;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 40px;
  align-items: center;
}

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

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

.hero-copy {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.hero-copy h1 {
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 600;
}

.hero-lead {
  font-size: 16px;
  color: var(--ink-soft);
}

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

.hero-terms {
  font-size: 14px;
  color: var(--ink-soft);
}

.hero-terms a {
  margin-left: 6px;
}

.hero-highlight {
  padding: 12px 16px;
  background: var(--accent-soft);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius-sm);
  font-size: 14px;
  color: #8A3A28;
}

.topic-tabs,
.recent-updates,
.cover-wall,
.theme-collections,
.reading-sequence,
.boundary-note {
  padding: 40px 0 8px;
}

.topic-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
}

.topic-item a {
  display: flex;
  flex-direction: column;
  gap: 6px;
  height: 100%;
  padding: 16px;
  background: var(--primary-soft);
  border: 1px solid transparent;
  border-radius: var(--radius);
  color: inherit;
  transition: transform .18s ease, border-color .18s ease, background-color .18s ease;
}

.topic-item a:hover {
  background: #FFFFFF;
  border-color: var(--primary);
  transform: translateY(-3px);
}

.topic-name {
  font-size: 16px;
  font-weight: 600;
  color: var(--primary);
}

.topic-desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.update-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  border-top: 1px solid var(--line);
}

.update-row {
  display: grid;
  grid-template-columns: 120px minmax(0, 1.6fr) 110px 110px 110px;
  align-items: center;
  gap: 14px;
  padding: 12px 4px;
  border-bottom: 1px solid var(--line);
  font-size: 15px;
}

.update-date {
  font-size: 14px;
  color: var(--ink-soft);
}

.update-title {
  font-weight: 600;
  color: var(--ink);
}

.update-chapter {
  font-size: 14px;
  color: var(--ink-soft);
}

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

.update-topic {
  font-size: 14px;
  color: var(--ink-soft);
}

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

.collection-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 16px;
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.collection-card img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  border-radius: var(--radius-sm);
}

.collection-card h3 {
  font-size: 17px;
}

.collection-desc {
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.collection-items {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 14px;
  color: var(--ink-soft);
}

.collection-card .collection-items li {
  padding-left: 14px;
  position: relative;
}

.collection-card .collection-items li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent);
}

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

.sequence-row {
  display: grid;
  grid-template-columns: 44px minmax(0, 200px) minmax(0, 1fr);
  gap: 14px;
  align-items: baseline;
  padding: 14px 16px;
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.sequence-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--accent);
  color: #FFFFFF;
  font-size: 14px;
  font-weight: 600;
}

.sequence-name {
  font-size: 16px;
  font-weight: 600;
}

.sequence-reason {
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.boundary-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  padding: 24px;
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.boundary-col h2 {
  font-size: 20px;
  margin-bottom: 12px;
}

.boundary-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 15px;
  color: var(--ink-soft);
}

.boundary-list li {
  padding-left: 16px;
  position: relative;
}

.boundary-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--primary);
}

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

.boundary-actions {
  margin-top: 14px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* --------------------------------------------------------------------------
   pages — 漫画分类
   -------------------------------------------------------------------------- */
.topic-overview,
.topic-blocks,
.topic-naming,
.cross-topic {
  padding: 36px 0 8px;
}

.topic-tag-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
}

.topic-tag a {
  display: block;
  padding: 14px 16px;
  background: var(--primary-soft);
  border: 1px solid transparent;
  border-radius: var(--radius);
  color: var(--primary);
  font-weight: 600;
  transition: transform .18s ease, border-color .18s ease, background-color .18s ease;
}

.topic-tag a:hover {
  background: #FFFFFF;
  border-color: var(--primary);
  transform: translateY(-3px);
}

.topic-tag-note {
  display: block;
  margin-top: 6px;
  font-size: 14px;
  font-weight: 400;
  line-height: 1.7;
  color: var(--ink-soft);
}

.topic-block {
  margin-bottom: 32px;
  padding: 20px;
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.topic-block-head {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  gap: 24px;
  align-items: center;
  margin-bottom: 20px;
}

.topic-block-media {
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--primary-soft);
}

.topic-block-media img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.topic-block-title {
  font-size: 20px;
  margin-bottom: 8px;
}

.topic-block-scope {
  font-size: 15px;
  color: var(--ink-soft);
}

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

.topic-naming-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 18px;
}

.topic-naming-item {
  padding: 16px;
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.topic-naming-item dt {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 6px;
}

.topic-naming-item dd {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.cross-topic-list {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.cross-topic-item {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  padding: 18px;
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.cross-topic-col {
  padding-right: 4px;
}

.cross-topic-name {
  font-size: 16px;
  margin-bottom: 6px;
}

.cross-topic-text {
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.cross-topic-verdict {
  grid-column: 1 / -1;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
  font-size: 14px;
  color: var(--primary);
}

/* --------------------------------------------------------------------------
   pages — 主题合集
   -------------------------------------------------------------------------- */
.collection-list {
  padding: 36px 0 8px;
}

.collection-block {
  margin-bottom: 28px;
  padding: 20px;
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.collection-head {
  display: grid;
  grid-template-columns: 300px minmax(0, 1fr);
  gap: 24px;
  align-items: center;
}

.collection-cover {
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--primary-soft);
}

.collection-cover img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.collection-intro h2 {
  font-size: 20px;
  margin-bottom: 8px;
}

.collection-scope {
  font-size: 15px;
  color: var(--primary);
}

.collection-intro p {
  margin-top: 8px;
  font-size: 15px;
  color: var(--ink-soft);
}

.collection-body {
  margin-top: 20px;
}

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

.collection-body .collection-items {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.collection-body .collection-items li {
  display: grid;
  grid-template-columns: minmax(0, 200px) minmax(0, 1fr);
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
  font-size: 15px;
}

.collection-body .collection-items .item-name {
  font-weight: 600;
}

.collection-body .collection-items .item-reason {
  color: var(--ink-soft);
  font-size: 14px;
}

.collection-order {
  margin-top: 14px;
  font-size: 14px;
  color: var(--ink-soft);
}

.collection-upkeep {
  padding: 36px 0 8px;
}

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

.upkeep-step {
  padding: 18px;
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.upkeep-step .step-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  margin-bottom: 12px;
  border-radius: 50%;
  background: var(--primary);
  color: #FFFFFF;
  font-size: 14px;
  font-weight: 600;
}

.upkeep-step h3 {
  font-size: 17px;
  margin-bottom: 8px;
}

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

/* --------------------------------------------------------------------------
   pages — 更新记录
   -------------------------------------------------------------------------- */
.record-visual {
  padding: 20px 0 0;
}

.record-figure {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--primary-soft);
}

.record-figure img {
  width: 100%;
  aspect-ratio: 21 / 9;
  object-fit: cover;
}

.record-figure figcaption {
  padding: 10px 16px;
  font-size: 14px;
  color: var(--ink-soft);
  background: #FFFFFF;
}

.update-groups {
  padding: 36px 0 8px;
}

.update-group {
  margin-bottom: 24px;
}

.update-group .update-date {
  font-size: 17px;
  font-weight: 600;
  color: var(--primary);
  padding-bottom: 8px;
  border-bottom: 2px solid var(--primary-soft);
  margin-bottom: 4px;
}

.update-groups .update-row {
  grid-template-columns: minmax(0, 1.6fr) 120px 130px 120px;
}

.status-fields {
  padding: 36px 0 8px;
}

.field-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 18px;
}

.field-item {
  padding: 16px;
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.field-item dt {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 6px;
}

.field-item dd {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.record-notes {
  padding: 36px 0 8px;
}

.record-notes-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
  gap: 28px;
}

.notes-col-text h2 {
  font-size: 22px;
  margin-bottom: 12px;
}

.notes-col-text p {
  margin-bottom: 12px;
  font-size: 15px;
  color: var(--ink-soft);
}

.notes-col-check {
  padding: 20px;
  background: var(--primary-soft);
  border-radius: var(--radius);
}

.notes-col-check h3 {
  font-size: 17px;
  margin-bottom: 12px;
  color: var(--primary);
}

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

.check-list li,
.check-item {
  padding-left: 18px;
  position: relative;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.check-list li::before,
.check-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 7px;
  height: 7px;
  border-radius: 2px;
  background: var(--accent);
}

/* --------------------------------------------------------------------------
   pages — 选读序列
   -------------------------------------------------------------------------- */
.sequence-list {
  padding: 36px 0 8px;
}

.sequence-items {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.sequence-item {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 16px;
  padding: 18px;
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.sequence-item .sequence-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--accent);
  color: #FFFFFF;
  font-size: 15px;
  font-weight: 600;
}

.sequence-body {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 20px;
  align-items: start;
}

.sequence-media {
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--primary-soft);
}

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

.sequence-copy {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.sequence-item .sequence-name {
  font-size: 17px;
  font-weight: 600;
}

.sequence-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 13px;
}

.tag-topic {
  padding: 2px 10px;
  border-radius: 999px;
  background: var(--primary-soft);
  color: var(--primary);
}

.badge-status {
  padding: 2px 10px;
  border-radius: 999px;
  font-size: 13px;
}

.badge-ongoing {
  background: var(--accent-soft);
  color: #A63F2B;
}

.badge-completed {
  background: var(--primary-soft);
  color: var(--primary);
}

.sequence-item .sequence-reason {
  font-size: 15px;
  color: var(--ink-soft);
}

.sequence-fit {
  font-size: 14px;
  color: var(--ink-soft);
}

.reading-stages {
  padding: 36px 0 8px;
}

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

.stage-card {
  padding: 18px;
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.stage-name {
  font-size: 17px;
  margin-bottom: 6px;
}

.stage-range {
  font-size: 14px;
  color: var(--accent);
  margin-bottom: 8px;
}

.stage-text {
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.mapping {
  padding: 36px 0 8px;
}

.mapping-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.mapping-col {
  padding: 20px;
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.mapping-col-title {
  font-size: 17px;
  margin-bottom: 12px;
}

.mapping-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 15px;
}

.mapping-list li {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr);
  gap: 10px;
  padding: 8px 0;
  border-bottom: 1px solid var(--line);
}

.mapping-key {
  font-weight: 600;
}

.mapping-note {
  margin-top: 12px;
  font-size: 14px;
  color: var(--ink-soft);
}

.mapping-foot {
  margin-top: 16px;
  font-size: 15px;
}

.mapping-foot a {
  margin-right: 16px;
}

/* --------------------------------------------------------------------------
   pages — 使用方法
   -------------------------------------------------------------------------- */
.browse-steps,
.glossary,
.task-paths,
.check-before {
  padding: 36px 0 8px;
}

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

.step-item {
  padding: 18px;
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.step-item.is-active {
  border-color: var(--primary);
  box-shadow: 0 0 0 2px var(--primary-soft);
}

.step-item .step-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  margin-bottom: 12px;
  border-radius: 50%;
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 14px;
  font-weight: 600;
}

.step-item.is-active .step-index {
  background: var(--primary);
  color: #FFFFFF;
}

.step-name {
  font-size: 17px;
  margin-bottom: 8px;
}

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

.glossary-media {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--primary-soft);
  margin-bottom: 20px;
}

.glossary-media img {
  width: 100%;
  aspect-ratio: 21 / 9;
  object-fit: cover;
}

.glossary-media figcaption {
  padding: 10px 16px;
  font-size: 14px;
  color: var(--ink-soft);
  background: #FFFFFF;
}

.term-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 18px;
}

.term-item {
  padding: 16px;
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.term-name {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 6px;
}

.term-desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-soft);
}

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

.path-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 20px;
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.path-title {
  font-size: 17px;
}

.path-desc {
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-soft);
  flex: 1;
}

.path-link {
  align-self: flex-start;
  font-size: 15px;
  color: var(--primary);
  border-bottom: 1px solid var(--line);
}

.path-link:hover {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.check-before .check-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 14px;
}

.check-item {
  padding: 14px 16px 14px 34px;
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

/* --------------------------------------------------------------------------
   pages — 帮助中心
   -------------------------------------------------------------------------- */
.page-layout {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(0, 1fr);
  gap: 32px;
  align-items: start;
  padding-top: 20px;
}

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

.faq-figure {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--primary-soft);
  margin-bottom: 24px;
}

.faq-figure img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.faq-figure figcaption {
  padding: 10px 16px;
  font-size: 14px;
  color: var(--ink-soft);
  background: #FFFFFF;
}

.faq-group {
  margin-bottom: 28px;
  scroll-margin-top: 84px;
}

.faq-group h2 {
  font-size: 20px;
  margin-bottom: 6px;
}

.faq-group-desc {
  font-size: 14px;
  color: var(--ink-soft);
  margin-bottom: 14px;
}

.faq-item {
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  margin-bottom: 10px;
  overflow: hidden;
}

.faq-item summary {
  padding: 14px 44px 14px 18px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
  position: relative;
}

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

.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 18px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 20px;
  font-weight: 400;
  color: var(--primary);
}

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

.faq-item summary:hover {
  color: var(--primary);
}

.faq-answer {
  padding: 14px 18px 16px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
  border-top: 1px solid var(--line);
}

.topic-directory {
  position: sticky;
  top: 84px;
  padding: 20px;
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.topic-directory-title {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 10px;
}

.topic-directory-title + .topic-directory-list {
  margin-bottom: 18px;
}

.topic-directory-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 14px;
}

.topic-directory-list a {
  color: var(--ink-soft);
}

.topic-directory-list a:hover {
  color: var(--primary);
}

.boundary-section,
.feedback-section {
  padding: 36px 0 8px;
}

.boundary-section h2,
.feedback-section h2 {
  font-size: 22px;
  margin-bottom: 10px;
}

.feedback-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 18px;
}

.feedback-step {
  padding: 18px;
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.feedback-step-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  margin-bottom: 12px;
  border-radius: 50%;
  background: var(--primary);
  color: #FFFFFF;
  font-size: 14px;
  font-weight: 600;
}

.feedback-step h3 {
  font-size: 17px;
  margin-bottom: 8px;
}

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

.feedback-note {
  margin-top: 16px;
  font-size: 14px;
  color: var(--ink-soft);
}

/* --------------------------------------------------------------------------
   pages — 404
   -------------------------------------------------------------------------- */
.error-main {
  padding: 64px 0;
}

.error-inner {
  max-width: var(--read);
  text-align: left;
}

.error-inner h1 {
  font-size: clamp(28px, 4vw, 40px);
  margin-bottom: 12px;
}

.error-lead {
  font-size: 17px;
  color: var(--ink);
  margin-bottom: 10px;
}

.error-text {
  font-size: 15px;
  color: var(--ink-soft);
  margin-bottom: 22px;
}

.error-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 28px;
}

.error-links {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 12px;
}

.error-links a {
  display: block;
  padding: 12px 16px;
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--primary);
  font-size: 15px;
}

.error-links a:hover {
  border-color: var(--primary);
  color: var(--accent);
}

/* --------------------------------------------------------------------------
   responsive — 900px / 640px 断点
   -------------------------------------------------------------------------- */
@media (max-width: 900px) {
  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: #FFFFFF;
    border-bottom: 1px solid var(--line);
    padding: 8px 20px 16px;
  }

  .site-nav .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

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

  .site-nav a {
    padding: 12px 0;
    border-bottom: 1px solid var(--line);
  }

  .site-nav a.is-current {
    border-bottom-color: var(--primary);
  }

  .site-header {
    position: relative;
  }

  .hero {
    padding-top: 24px;
  }

  .hero-inner {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .hero-copy {
    order: 1;
  }

  .hero-media {
    order: 2;
  }

  .topic-block-head,
  .collection-head {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .update-row,
  .update-groups .update-row {
    grid-template-columns: 1fr 1fr;
    gap: 8px 14px;
  }

  .update-date {
    grid-column: 1 / -1;
  }

  .collection-cards,
  .upkeep-steps,
  .stage-list,
  .step-nav,
  .path-grid,
  .feedback-steps,
  .related-link-list,
  .related-grid,
  .entry-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .boundary-inner,
  .record-notes-inner,
  .mapping-columns {
    grid-template-columns: 1fr;
  }

  .page-layout {
    grid-template-columns: 1fr;
  }

  .topic-directory {
    position: static;
  }

  .footer-inner {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  body {
    font-size: 15px;
  }

  .cover-grid {
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 14px;
  }

  .topic-list,
  .topic-tag-list,
  .topic-naming-list,
  .field-list,
  .term-list,
  .check-before .check-list {
    grid-template-columns: 1fr;
  }

  .collection-cards,
  .upkeep-steps,
  .stage-list,
  .step-nav,
  .path-grid,
  .feedback-steps,
  .related-link-list,
  .related-grid,
  .entry-grid {
    grid-template-columns: 1fr;
  }

  .sequence-row {
    grid-template-columns: 36px minmax(0, 1fr);
  }

  .sequence-row .sequence-reason {
    grid-column: 2 / -1;
  }

  .sequence-item {
    grid-template-columns: 36px minmax(0, 1fr);
    gap: 12px;
    padding: 14px;
  }

  .sequence-body {
    grid-template-columns: 1fr;
  }

  .cross-topic-item {
    grid-template-columns: 1fr;
  }

  .collection-body .collection-items li {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .mapping-list li {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .error-main {
    padding: 40px 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    transition-duration: .01ms !important;
    animation-duration: .01ms !important;
  }

  .btn:hover,
  .cover-card:hover,
  .topic-item a:hover,
  .topic-tag a:hover,
  .related-link-card a:hover,
  .related-card:hover,
  .entry-card:hover {
    transform: none;
  }
}