/* ==========================================================================
   YY影院在线观看 · 全站样式表
   结构：base → layout → components → pages → responsive
   ========================================================================== */

/* --------------------------------------------------------------------------
   base：变量、重置、排版
   -------------------------------------------------------------------------- */
:root {
  --color-ink: #1f2a37;
  --color-ink-soft: #384454;
  --color-accent: #e07a3f;
  --color-accent-deep: #c4632c;
  --color-bg: #f7f5f2;
  --color-surface: #ffffff;
  --color-muted: #5b6472;
  --color-line: #e2ddd6;
  --color-line-soft: #efebe5;
  --color-tag-bg: #f4ece4;
  --color-footer-bg: #1f2a37;
  --color-footer-ink: #cfd6de;
  --radius-card: 8px;
  --radius-pill: 999px;
  --shadow-card: 0 1px 2px rgba(31, 42, 55, 0.06), 0 8px 20px -14px rgba(31, 42, 55, 0.28);
  --shadow-card-hover: 0 6px 14px rgba(31, 42, 55, 0.10), 0 18px 34px -18px rgba(31, 42, 55, 0.32);
  --container: 1180px;
  --header-height: 68px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", sans-serif;
}

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

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

body {
  margin: 0;
  background-color: var(--color-bg);
  color: var(--color-ink-soft);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
}

h1,
h2,
h3,
h4 {
  margin: 0 0 0.6em;
  color: var(--color-ink);
  font-weight: 700;
  line-height: 1.35;
}

h1 {
  font-size: 32px;
}

h2 {
  font-size: 24px;
}

h3 {
  font-size: 18px;
}

h4 {
  font-size: 16px;
}

p {
  margin: 0 0 1em;
}

ul,
ol {
  margin: 0 0 1em;
  padding: 0;
  list-style: none;
}

a {
  color: var(--color-accent-deep);
  text-decoration: none;
  transition: color 0.18s ease;
}

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

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

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

figure {
  margin: 0;
}

time {
  font-variant-numeric: tabular-nums;
}

button {
  font: inherit;
  color: inherit;
}

/* --------------------------------------------------------------------------
   layout：页头、主导航、主容器、内页骨架、页脚
   -------------------------------------------------------------------------- */
.site-body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background-color: var(--color-ink);
  color: #ffffff;
  transition: background-color 0.24s ease, box-shadow 0.24s ease;
}

.site-header.is-scrolled {
  background-color: #182230;
  box-shadow: 0 6px 18px -12px rgba(0, 0, 0, 0.7);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  width: 100%;
  max-width: var(--container);
  min-height: var(--header-height);
  margin: 0 auto;
  padding: 10px 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: #ffffff;
  text-decoration: none;
}

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

.brand-mark {
  flex: none;
  width: 34px;
  height: 34px;
  border-radius: 6px;
  background-color: var(--color-accent);
  background-image: linear-gradient(180deg, rgba(255, 255, 255, 0.22), rgba(255, 255, 255, 0));
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.22);
}

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

.brand-name {
  font-size: 17px;
  font-weight: 700;
  color: #ffffff;
}

.brand-slogan {
  font-size: 12px;
  color: #a9b4c1;
}

.site-nav {
  display: block;
}

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

.nav-item {
  margin: 0;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 12px;
  border-radius: 6px;
  color: #d7dee6;
  font-size: 15px;
  text-decoration: none;
  transition: background-color 0.18s ease, color 0.18s ease;
}

.nav-link:hover,
.nav-link:focus-visible {
  background-color: rgba(255, 255, 255, 0.08);
  color: #ffffff;
  text-decoration: none;
}

.nav-link.is-current {
  background-color: var(--color-accent);
  color: #ffffff;
  font-weight: 600;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 46px;
  height: 44px;
  padding: 0 11px;
  border: 1px solid rgba(255, 255, 255, 0.24);
  border-radius: 6px;
  background-color: transparent;
  cursor: pointer;
}

.nav-toggle-bar {
  display: block;
  width: 100%;
  height: 2px;
  border-radius: 2px;
  background-color: #ffffff;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.site-main {
  display: block;
  flex: 1 0 auto;
  width: 100%;
}

.home-main {
  width: 100%;
}

.inner-main {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 22px 24px 56px;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin: 0 0 14px;
  font-size: 14px;
  color: var(--color-muted);
}

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

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

.breadcrumb-sep {
  color: #b3aca2;
}

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

.page-header {
  margin: 0 0 30px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--color-line);
}

.page-title {
  margin: 0 0 10px;
  font-size: 32px;
  font-weight: 700;
  color: var(--color-ink);
}

.page-description {
  max-width: 780px;
  margin: 0;
  font-size: 16px;
  color: var(--color-muted);
}

.page-layout {
  display: grid;
  gap: 34px;
  align-items: start;
}

.layout-with-aside {
  grid-template-columns: minmax(0, 1fr) 300px;
}

.layout-shell {
  grid-template-columns: minmax(0, 1fr) 296px;
}

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

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

/* 页脚 */
.site-footer {
  margin-top: auto;
  background-color: var(--color-footer-bg);
  color: var(--color-footer-ink);
  font-size: 14px;
}

.footer-inner {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1.2fr 1fr;
  gap: 32px;
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 42px 24px 30px;
}

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

.footer-name {
  margin: 0 0 10px;
  font-size: 17px;
  font-weight: 700;
  color: #ffffff;
}

.footer-desc {
  margin: 0;
  color: #9aa5b3;
  line-height: 1.75;
}

.footer-heading {
  margin: 0 0 12px;
  font-size: 14px;
  font-weight: 700;
  color: #ffffff;
}

.footer-list {
  margin: 0;
}

.footer-list li {
  margin-bottom: 8px;
}

.footer-list a {
  display: inline-block;
  min-height: 24px;
  color: #b8c2ce;
}

.footer-list a:hover,
.footer-list a:focus-visible {
  color: #ffffff;
}

.footer-boundary p {
  margin: 0;
  color: #9aa5b3;
  line-height: 1.75;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}

.footer-copyright {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 16px 24px;
  color: #8d98a6;
  font-size: 13px;
}

/* --------------------------------------------------------------------------
   components：通用标题区、按钮、卡片、标签、步骤、问答
   -------------------------------------------------------------------------- */
.section {
  margin: 0 0 46px;
}

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 10px 24px;
  margin-bottom: 22px;
}

.section-title {
  margin: 0;
  font-size: 24px;
  color: var(--color-ink);
}

.section-head .section-title {
  position: relative;
  padding-left: 14px;
}

.section-head .section-title::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 20px;
  border-radius: 2px;
  background-color: var(--color-accent);
}

.section-desc {
  margin: 0;
  max-width: 520px;
  font-size: 14px;
  color: var(--color-muted);
}

.section-desc a {
  font-weight: 600;
}

.section-lead,
.section-intro {
  margin: -8px 0 20px;
  max-width: 760px;
  color: var(--color-muted);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 22px;
  border-radius: 6px;
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  transition: background-color 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

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

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

.btn-primary:hover,
.btn-primary:focus-visible {
  background-color: var(--color-accent-deep);
  color: #ffffff;
}

.btn-ghost {
  border: 1px solid rgba(255, 255, 255, 0.5);
  color: #ffffff;
}

.btn-ghost:hover,
.btn-ghost:focus-visible {
  background-color: rgba(255, 255, 255, 0.12);
  border-color: #ffffff;
  color: #ffffff;
}

.field-label {
  display: inline-block;
  margin-right: 6px;
  padding: 1px 8px;
  border-radius: 4px;
  background-color: var(--color-tag-bg);
  color: var(--color-accent-deep);
  font-size: 12px;
  font-weight: 600;
}

/* 图片容器统一约束 */
.hero-media img,
.channel-media img,
.topic-media img,
.topic-figure img,
.media-figure img,
.guide-figure img,
.faq-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* 步骤清单 */
.step-list {
  margin: 0;
  display: grid;
  gap: 14px;
}

.step-item {
  display: flex;
  gap: 14px;
  padding: 16px 18px;
  border: 1px solid var(--color-line-soft);
  border-radius: var(--radius-card);
  background-color: var(--color-surface);
  box-shadow: var(--shadow-card);
}

.step-index {
  flex: none;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background-color: var(--color-accent);
  color: #ffffff;
  font-size: 14px;
  font-weight: 700;
  line-height: 30px;
  text-align: center;
}

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

.step-title {
  margin: 0 0 4px;
  font-size: 16px;
  color: var(--color-ink);
}

.step-text {
  margin: 0;
  font-size: 15px;
  color: var(--color-muted);
}

/* 折叠问答 */
.faq-list {
  display: grid;
  gap: 10px;
}

.faq-item {
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  background-color: var(--color-surface);
  box-shadow: var(--shadow-card);
  overflow: hidden;
}

.faq-question {
  position: relative;
  padding: 15px 46px 15px 18px;
  color: var(--color-ink);
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
}

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

.faq-question::after {
  content: "+";
  position: absolute;
  right: 18px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-accent);
  font-size: 20px;
  font-weight: 700;
  line-height: 1;
}

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

.faq-answer {
  padding: 0 18px 16px;
  border-top: 1px solid var(--color-line-soft);
}

.faq-answer p {
  margin: 12px 0 0;
  font-size: 15px;
  color: var(--color-muted);
}

/* 侧栏区块（频道页 / 指南页共用基础样式，各自作用域下细化） */
.aside-block,
.sidebar-block {
  margin-bottom: 18px;
  padding: 18px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  background-color: var(--color-surface);
  box-shadow: var(--shadow-card);
}

.aside-title,
.sidebar-title {
  margin: 0 0 10px;
  font-size: 16px;
  color: var(--color-ink);
}

.aside-text,
.sidebar-text {
  margin: 0 0 8px;
  font-size: 14px;
  color: var(--color-muted);
}

.aside-text:last-child,
.sidebar-text:last-child {
  margin-bottom: 0;
}

.aside-links {
  margin: 0;
  font-size: 14px;
}

.aside-links li {
  margin-bottom: 8px;
}

.aside-note {
  margin: 10px 0 0;
  padding-top: 10px;
  border-top: 1px dashed var(--color-line);
  font-size: 13px;
  color: var(--color-muted);
}

/* --------------------------------------------------------------------------
   pages：首页
   -------------------------------------------------------------------------- */
.hero {
  position: relative;
  background-color: var(--color-ink);
  color: #ffffff;
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 40px;
  align-items: center;
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 48px 24px 54px;
}

.hero-media {
  position: relative;
  order: 2;
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow: 0 22px 44px -26px rgba(0, 0, 0, 0.85);
}

.hero-media img {
  aspect-ratio: 16 / 10;
  min-height: 240px;
}

.hero-content {
  order: 1;
  min-width: 0;
}

.hero-eyebrow {
  margin: 0 0 12px;
  color: var(--color-accent);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.hero-title {
  margin: 0 0 14px;
  font-size: 34px;
  color: #ffffff;
}

.hero-desc {
  max-width: 560px;
  margin: 0 0 20px;
  color: #cdd5de;
  font-size: 16px;
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 24px;
}

.hero-tag a {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0 14px;
  border: 1px solid rgba(255, 255, 255, 0.26);
  border-radius: var(--radius-pill);
  color: #e6ebf1;
  font-size: 14px;
  text-decoration: none;
  transition: background-color 0.18s ease, border-color 0.18s ease, color 0.18s ease;
}

.hero-tag a:hover,
.hero-tag a:focus-visible {
  background-color: rgba(224, 122, 63, 0.2);
  border-color: var(--color-accent);
  color: #ffffff;
  text-decoration: none;
}

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

/* 首页频道总览 */
.channel-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.channel-card {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  background-color: var(--color-surface);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.channel-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-card-hover);
}

.channel-media {
  margin: 0;
  background-color: var(--color-line-soft);
}

.channel-media img {
  aspect-ratio: 16 / 9;
}

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

.channel-name {
  margin: 0 0 10px;
  font-size: 17px;
  color: var(--color-ink);
}

.channel-scope,
.channel-audience {
  margin: 0 0 8px;
  font-size: 14px;
  color: var(--color-muted);
}

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

.channel-meta {
  margin: 10px 0 0;
  font-size: 13px;
  color: var(--color-muted);
}

/* 首页专题片单 */
.topic-row {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
}

.topic-card {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  background-color: var(--color-surface);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.topic-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-card-hover);
}

.topic-media,
.topic-figure {
  margin: 0;
  background-color: var(--color-line-soft);
}

.topic-media img,
.topic-figure img {
  aspect-ratio: 3 / 2;
}

.topic-body {
  display: flex;
  flex-direction: column;
  flex: 1 1 auto;
  padding: 16px 18px 18px;
}

.topic-name {
  margin: 0 0 10px;
  font-size: 16px;
  color: var(--color-ink);
}

.topic-scope,
.topic-order {
  margin: 0 0 8px;
  font-size: 14px;
  color: var(--color-muted);
}

.topic-order {
  margin-bottom: 0;
}

/* 首页最近更新 */
.update-timeline {
  position: relative;
  margin: 0;
  padding-left: 22px;
  border-left: 2px solid var(--color-line);
}

.update-item {
  position: relative;
  padding: 0 0 20px 4px;
}

.update-item:last-child {
  padding-bottom: 0;
}

.update-item::before {
  content: "";
  position: absolute;
  left: -30px;
  top: 8px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-bg);
}

.update-date {
  display: inline-block;
  margin-right: 10px;
  color: var(--color-ink);
  font-size: 14px;
  font-weight: 700;
}

.update-type {
  display: inline-block;
  padding: 1px 10px;
  border-radius: var(--radius-pill);
  background-color: var(--color-tag-bg);
  color: var(--color-accent-deep);
  font-size: 12px;
  font-weight: 600;
}

.update-summary {
  margin: 6px 0 0;
  font-size: 15px;
  color: var(--color-muted);
}

/* 首页观看指南要点 */
.section-guide .step-list {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

/* --------------------------------------------------------------------------
   pages：频道分类页
   -------------------------------------------------------------------------- */
.group-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.group-card {
  padding: 18px;
  border: 1px solid var(--color-line);
  border-left: 4px solid var(--color-accent);
  border-radius: var(--radius-card);
  background-color: var(--color-surface);
  box-shadow: var(--shadow-card);
}

.group-name {
  margin: 0 0 8px;
  font-size: 17px;
  color: var(--color-ink);
}

.group-desc {
  margin: 0;
  font-size: 14px;
  color: var(--color-muted);
}

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

.advice-list {
  display: grid;
  gap: 14px;
  counter-reset: advice;
}

.advice-item {
  position: relative;
  padding: 16px 18px 16px 58px;
  border: 1px solid var(--color-line-soft);
  border-radius: var(--radius-card);
  background-color: var(--color-surface);
  box-shadow: var(--shadow-card);
  counter-increment: advice;
}

.advice-item::before {
  content: counter(advice);
  position: absolute;
  left: 18px;
  top: 16px;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background-color: var(--color-tag-bg);
  color: var(--color-accent-deep);
  font-size: 14px;
  font-weight: 700;
  line-height: 26px;
  text-align: center;
}

.advice-title {
  margin: 0 0 6px;
  font-size: 16px;
  color: var(--color-ink);
}

.advice-desc {
  margin: 0;
  font-size: 14px;
  color: var(--color-muted);
}

/* --------------------------------------------------------------------------
   pages：专题片单页
   -------------------------------------------------------------------------- */
.topic-group {
  margin-bottom: 34px;
}

.topic-group:last-child {
  margin-bottom: 0;
}

.topic-group-title {
  margin: 0 0 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-line);
  font-size: 19px;
  color: var(--color-ink);
}

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

.topic-label {
  display: inline-block;
  margin-right: 6px;
  padding: 1px 8px;
  border-radius: 4px;
  background-color: var(--color-tag-bg);
  color: var(--color-accent-deep);
  font-size: 12px;
  font-weight: 600;
}

.topic-link {
  display: inline-flex;
  align-items: center;
  align-self: flex-start;
  min-height: 34px;
  margin-top: auto;
  padding-top: 10px;
  font-size: 14px;
  font-weight: 600;
}

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

.order-field {
  padding: 18px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  background-color: var(--color-surface);
  box-shadow: var(--shadow-card);
}

.order-field-title {
  margin: 0 0 8px;
  font-size: 16px;
  color: var(--color-ink);
}

.order-field p {
  margin: 0;
  font-size: 14px;
  color: var(--color-muted);
}

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

.topic-channel-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  background-color: var(--color-surface);
  box-shadow: var(--shadow-card);
}

.topic-channel-tag {
  flex: none;
  padding: 2px 10px;
  border-radius: var(--radius-pill);
  background-color: var(--color-tag-bg);
  color: var(--color-accent-deep);
  font-size: 12px;
  font-weight: 600;
}

.topic-channel-arrow {
  flex: none;
  color: #b3aca2;
  font-size: 14px;
}

.topic-channel-link {
  min-width: 0;
  font-size: 15px;
  font-weight: 600;
}

.topic-channel-note {
  margin: 0;
  font-size: 14px;
  color: var(--color-muted);
}

.topic-channel-note a {
  margin-right: 12px;
  font-weight: 600;
}

/* --------------------------------------------------------------------------
   pages：观看指南页
   -------------------------------------------------------------------------- */
.guide-section {
  margin-bottom: 40px;
}

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

.guide-figure {
  margin: 0 0 20px;
  border-radius: var(--radius-card);
  overflow: hidden;
  background-color: var(--color-line-soft);
  box-shadow: var(--shadow-card);
}

.guide-figure img {
  aspect-ratio: 16 / 7;
}

.guide-figure figcaption {
  padding: 10px 16px;
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-line-soft);
  font-size: 13px;
  color: var(--color-muted);
}

.step-list-numbered .step-index {
  background-color: var(--color-ink);
}

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

.issue-item {
  padding: 18px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  background-color: var(--color-surface);
  box-shadow: var(--shadow-card);
}

.issue-title {
  margin: 0 0 8px;
  font-size: 16px;
  color: var(--color-ink);
}

.issue-text {
  margin: 0;
  font-size: 14px;
  color: var(--color-muted);
}

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

.link-item {
  padding: 14px 18px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  background-color: var(--color-surface);
  box-shadow: var(--shadow-card);
}

.link-item a {
  font-size: 15px;
  font-weight: 600;
}

.sidebar-list {
  margin: 0;
}

.sidebar-list li {
  padding-bottom: 10px;
  margin-bottom: 10px;
  border-bottom: 1px dashed var(--color-line);
}

.sidebar-list li:last-child {
  padding-bottom: 0;
  margin-bottom: 0;
  border-bottom: 0;
}

.sidebar-list a {
  display: block;
  min-height: 26px;
  font-size: 14px;
  font-weight: 600;
}

.sidebar-note {
  display: block;
  margin-top: 2px;
  font-size: 13px;
  color: var(--color-muted);
}

/* --------------------------------------------------------------------------
   pages：最近更新页
   -------------------------------------------------------------------------- */
.archive-overview {
  display: grid;
  grid-template-columns: minmax(0, 360px) minmax(0, 1fr);
  gap: 28px;
  align-items: center;
  margin-bottom: 44px;
  padding: 22px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  background-color: var(--color-surface);
  box-shadow: var(--shadow-card);
}

.archive-overview-media {
  min-width: 0;
}

.media-figure {
  margin: 0;
  border-radius: var(--radius-card);
  overflow: hidden;
  background-color: var(--color-line-soft);
}

.media-figure img {
  aspect-ratio: 16 / 10;
}

.media-figure figcaption {
  padding: 8px 14px;
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-line-soft);
  font-size: 13px;
  color: var(--color-muted);
}

.archive-overview-body {
  min-width: 0;
}

.archive-overview-body .section-title {
  margin: 0 0 10px;
}

.archive-overview-body p {
  margin: 0 0 14px;
  font-size: 15px;
  color: var(--color-muted);
}

.archive-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0;
}

.legend-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--color-muted);
}

.legend-tag {
  display: inline-block;
  padding: 2px 10px;
  border-radius: var(--radius-pill);
  font-size: 12px;
  font-weight: 600;
}

.tag-channel {
  background-color: #e8eef7;
  color: #33507a;
}

.tag-topic {
  background-color: var(--color-tag-bg);
  color: var(--color-accent-deep);
}

.tag-guide {
  background-color: #e6f2ea;
  color: #2f6a49;
}

.update-timeline .timeline-group {
  margin-bottom: 30px;
}

.update-timeline .timeline-group:last-child {
  margin-bottom: 0;
}

.timeline-month {
  margin: 0 0 14px;
  padding-left: 12px;
  border-left: 4px solid var(--color-accent);
  font-size: 18px;
  color: var(--color-ink);
}

.timeline-list {
  margin: 0;
  padding-left: 18px;
  border-left: 2px solid var(--color-line);
}

.timeline-item {
  position: relative;
  display: grid;
  grid-template-columns: 108px minmax(0, 1fr);
  gap: 6px 16px;
  padding: 0 0 20px 4px;
}

.timeline-item:last-child {
  padding-bottom: 0;
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: -25px;
  top: 8px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-bg);
}

.timeline-date {
  color: var(--color-ink);
  font-size: 14px;
  font-weight: 700;
}

.timeline-type {
  justify-self: start;
  align-self: start;
  padding: 1px 10px;
  border-radius: var(--radius-pill);
  font-size: 12px;
  font-weight: 600;
}

.timeline-body {
  grid-column: 2 / 3;
  min-width: 0;
}

.timeline-title {
  margin: 0 0 4px;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-ink);
}

.timeline-summary {
  margin: 0;
  font-size: 14px;
  color: var(--color-muted);
}

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

.field-item {
  padding: 18px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  background-color: var(--color-surface);
  box-shadow: var(--shadow-card);
}

.field-item dt {
  margin-bottom: 8px;
  color: var(--color-ink);
  font-size: 16px;
  font-weight: 700;
}

.field-item dd {
  margin: 0;
  font-size: 14px;
  color: var(--color-muted);
}

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

.entry-item {
  padding: 18px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  background-color: var(--color-surface);
  box-shadow: var(--shadow-card);
}

.entry-link {
  display: inline-block;
  min-height: 26px;
  font-size: 15px;
  font-weight: 600;
}

.entry-desc {
  margin: 8px 0 0;
  font-size: 14px;
  color: var(--color-muted);
}

/* --------------------------------------------------------------------------
   pages：常见问题页
   -------------------------------------------------------------------------- */
.faq-overview {
  margin-bottom: 40px;
  padding: 22px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  background-color: var(--color-surface);
  box-shadow: var(--shadow-card);
}

.faq-overview .section-title {
  margin: 0 0 10px;
}

.faq-overview .section-intro {
  margin: 0 0 18px;
}

.faq-figure {
  margin: 0 0 18px;
  border-radius: var(--radius-card);
  overflow: hidden;
  background-color: var(--color-line-soft);
}

.faq-figure img {
  aspect-ratio: 16 / 6;
}

.faq-figure figcaption {
  padding: 8px 14px;
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-line-soft);
  font-size: 13px;
  color: var(--color-muted);
}

.faq-jump-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin: 0;
}

.faq-jump-item a {
  display: block;
  min-height: 44px;
  padding: 11px 16px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  background-color: var(--color-bg);
  font-size: 14px;
  font-weight: 600;
  transition: border-color 0.18s ease, background-color 0.18s ease;
}

.faq-jump-item a:hover,
.faq-jump-item a:focus-visible {
  border-color: var(--color-accent);
  background-color: var(--color-tag-bg);
  text-decoration: none;
}

.faq-group {
  margin-bottom: 40px;
}

.faq-group:last-of-type {
  margin-bottom: 0;
}

.feedback-note {
  margin-top: 40px;
  padding: 22px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  background-color: var(--color-surface);
  box-shadow: var(--shadow-card);
}

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

.feedback-note .section-intro {
  margin: 0 0 18px;
}

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

.feedback-step {
  padding: 16px 18px;
  border: 1px solid var(--color-line-soft);
  border-radius: var(--radius-card);
  background-color: var(--color-bg);
}

.feedback-step .step-title {
  margin: 0 0 6px;
}

.feedback-step p {
  margin: 0;
  font-size: 14px;
  color: var(--color-muted);
}

/* --------------------------------------------------------------------------
   pages：404
   -------------------------------------------------------------------------- */
.error-main {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 56px 24px 64px;
}

.error-hero {
  max-width: 720px;
  margin-bottom: 44px;
}

.error-code {
  margin: 0 0 10px;
  color: var(--color-accent);
  font-size: 15px;
  font-weight: 700;
}

.error-hero h1 {
  margin: 0 0 14px;
  font-size: 32px;
}

.error-lead {
  margin: 0 0 22px;
  color: var(--color-muted);
}

.error-home-link {
  display: inline-flex;
  align-items: center;
  min-height: 46px;
  padding: 0 22px;
  border-radius: 6px;
  background-color: var(--color-accent);
  color: #ffffff;
  font-weight: 600;
}

.error-home-link:hover,
.error-home-link:focus-visible {
  background-color: var(--color-accent-deep);
  color: #ffffff;
  text-decoration: none;
}

.error-paths {
  margin-bottom: 40px;
}

.error-paths h2 {
  margin: 0 0 8px;
  font-size: 22px;
}

.error-paths p {
  margin: 0 0 18px;
  color: var(--color-muted);
}

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

.error-path-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 18px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  background-color: var(--color-surface);
  box-shadow: var(--shadow-card);
}

.error-path-item a {
  font-size: 15px;
  font-weight: 600;
}

.error-path-item span {
  font-size: 13px;
  color: var(--color-muted);
}

.error-note h2 {
  margin: 0 0 12px;
  font-size: 22px;
}

.error-note-list {
  display: grid;
  gap: 10px;
  margin: 0;
}

.error-note-list li {
  position: relative;
  padding-left: 18px;
  font-size: 15px;
  color: var(--color-muted);
}

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

/* --------------------------------------------------------------------------
   responsive：平板与手机
   -------------------------------------------------------------------------- */
@media (max-width: 1080px) {
  .hero-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 28px;
    padding: 36px 24px 44px;
  }

  .hero-media {
    order: 1;
  }

  .hero-content {
    order: 2;
  }

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

  .field-list,
  .entry-list,
  .feedback-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 960px) {
  .layout-with-aside,
  .layout-shell {
    grid-template-columns: minmax(0, 1fr);
    gap: 28px;
  }

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

  .footer-inner {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 26px;
  }
}

@media (max-width: 860px) {
  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    background-color: #182230;
    border-top: 1px solid rgba(255, 255, 255, 0.12);
    box-shadow: 0 18px 30px -20px rgba(0, 0, 0, 0.9);
  }

  .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 10px 16px 16px;
  }

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

  .nav-link {
    min-height: 48px;
    padding: 0 14px;
    border-radius: 6px;
    font-size: 16px;
  }

  .channel-grid,
  .section-channel-list .channel-grid,
  .group-grid,
  .topic-grid,
  .order-field-list,
  .topic-channel-list,
  .issue-list,
  .faq-jump-list,
  .error-path-list {
    grid-template-columns: minmax(0, 1fr);
  }

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

@media (max-width: 640px) {
  .header-inner {
    padding: 8px 16px;
  }

  .brand-slogan {
    display: none;
  }

  .inner-main,
  .error-main {
    padding-left: 16px;
    padding-right: 16px;
  }

  .hero-inner {
    padding: 28px 16px 36px;
  }

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

  .section-head {
    flex-direction: column;
    align-items: flex-start;
  }

  .section-desc {
    max-width: none;
  }

  .topic-row,
  .field-list,
  .entry-list,
  .feedback-steps,
  .footer-inner {
    grid-template-columns: minmax(0, 1fr);
  }

  .hero-media img {
    min-height: 180px;
  }

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

  .timeline-body {
    grid-column: 1 / 2;
  }

  .timeline-type {
    justify-self: start;
  }

  .step-item {
    padding: 14px 15px;
  }

  .footer-copyright {
    padding-left: 16px;
    padding-right: 16px;
  }
}