/* ==========================================================================
   董小宛天美传媒 · 全站样式
   分组：base / layout / components / pages / responsive
   ========================================================================== */

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

:root {
  --ink: #0B1320;
  --ink-deep: #070D17;
  --ink-soft: #121D2E;
  --ink-line: #1E2C42;
  --paper: #F3EFE4;
  --paper-dim: #D9D3C4;
  --gold: #C8A45A;
  --gold-dim: #8E7440;
  --cyan: #57D6C4;
  --brick: #C45A46;
  --mist: #8C98A6;
  --mist-soft: #6B7889;

  --font-serif: "Songti SC", "Noto Serif SC", "Source Han Serif SC", serif;
  --font-sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
  --font-mono: ui-monospace, "SFMono-Regular", Consolas, "Liberation Mono", monospace;

  --shell: 1180px;
  --shell-pad: 24px;
  --header-h: 72px;
  --radius: 6px;
  --radius-sm: 4px;
}

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

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

body {
  margin: 0;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--font-serif);
  font-weight: 600;
  line-height: 1.32;
  margin: 0;
  color: var(--paper);
}

p {
  margin: 0;
}

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

a {
  color: var(--paper);
  text-decoration: none;
  transition: color 0.2s ease, border-color 0.2s ease;
}

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

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

figure {
  margin: 0;
}

button {
  font-family: inherit;
  cursor: pointer;
}

::selection {
  background: var(--gold);
  color: var(--ink-deep);
}

:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  left: 16px;
  top: -60px;
  z-index: 200;
  padding: 10px 18px;
  background: var(--gold);
  color: var(--ink-deep);
  border-radius: var(--radius-sm);
  font-size: 14px;
}

.skip-link:focus {
  top: 12px;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(11, 19, 32, 0.94);
  border-bottom: 1px solid var(--ink-line);
  backdrop-filter: blur(8px);
}

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

.brand {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 600;
  color: var(--paper);
  white-space: nowrap;
  padding-left: 14px;
  border-left: 3px solid var(--gold);
  line-height: 1.2;
}

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

.site-nav {
  display: flex;
  align-items: center;
}

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

.nav-link {
  display: block;
  padding: 8px 12px;
  font-size: 15px;
  color: var(--paper-dim);
  border-bottom: 2px solid transparent;
  line-height: 1.6;
}

.nav-link:hover {
  color: var(--cyan);
  border-bottom-color: var(--gold);
}

.nav-link.is-current {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 0;
  background: transparent;
  border: 1px solid var(--ink-line);
  border-radius: var(--radius-sm);
  position: relative;
}

.nav-toggle-bar,
.nav-toggle-bar::before,
.nav-toggle-bar::after {
  position: absolute;
  left: 50%;
  width: 20px;
  height: 2px;
  background: var(--paper);
  transform: translateX(-50%);
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.nav-toggle-bar {
  top: 50%;
  margin-top: -1px;
}

.nav-toggle-bar::before {
  content: "";
  top: -6px;
}

.nav-toggle-bar::after {
  content: "";
  top: 6px;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar {
  background: transparent;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar::before {
  transform: translateX(-50%) translateY(6px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar::after {
  transform: translateX(-50%) translateY(-6px) rotate(-45deg);
}

.site-main {
  display: block;
}

.inner-main {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 var(--shell-pad) 80px;
}

.content-shell {
  max-width: var(--shell);
  margin: 0 auto;
}

/* 面包屑 */

.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  padding: 24px 0 0;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--mist);
}

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

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

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

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

/* 页面标题区 */

.page-header {
  padding: 22px 0 28px;
  border-bottom: 1px solid var(--ink-line);
  margin-bottom: 40px;
}

.page-title {
  font-size: 48px;
  font-weight: 600;
  color: var(--paper);
  line-height: 1.24;
}

/* 页脚 */

.site-footer {
  border-top: 1px solid var(--ink-line);
  background: var(--ink-deep);
  padding: 56px 0 0;
}

.footer-inner {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 var(--shell-pad) 40px;
  display: grid;
  grid-template-columns: 1.6fr repeat(4, 1fr);
  gap: 40px;
}

.footer-brand {
  padding-right: 12px;
}

.footer-name {
  font-family: var(--font-serif);
  font-size: 19px;
  color: var(--paper);
  margin-bottom: 10px;
  padding-left: 12px;
  border-left: 3px solid var(--gold);
  line-height: 1.3;
}

.footer-desc {
  font-size: 14px;
  color: var(--mist);
  line-height: 1.75;
}

.footer-title {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  color: var(--gold);
  text-transform: uppercase;
  margin-bottom: 16px;
  line-height: 1.6;
}

.footer-list li {
  margin-bottom: 10px;
}

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

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

.footer-bottom {
  border-top: 1px solid var(--ink-line);
}

.footer-bottom {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 20px var(--shell-pad) 28px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 32px;
}

.footer-note {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--mist-soft);
  line-height: 1.7;
}

/* --------------------------------------------------------------------------
   components · 通用区块
   -------------------------------------------------------------------------- */

.section-head {
  margin-bottom: 30px;
}

.section-tag,
.section-kicker,
.section-label {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--gold);
  letter-spacing: 0.02em;
  margin-bottom: 10px;
  display: block;
}

.section-head h2,
.section-title {
  font-size: 30px;
  margin-bottom: 12px;
}

.section-desc,
.section-note,
.section-intro {
  font-size: 15px;
  color: var(--mist);
  line-height: 1.8;
  max-width: 720px;
}

.section-head--offset {
  padding-left: 40px;
}

.section-foot {
  margin-top: 26px;
  font-size: 14px;
  color: var(--mist);
}

.section-foot a {
  color: var(--cyan);
  border-bottom: 1px solid var(--gold-dim);
  margin-right: 6px;
}

.section-foot a:hover {
  border-bottom-color: var(--cyan);
}

/* 图片容器 */

.hero-media img,
.channel-figure img,
.page-head-media img,
.page-hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid var(--ink-line);
}

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

.home-main {
  display: block;
}

.hero {
  border-bottom: 1px solid var(--ink-line);
}

.hero-inner {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 56px var(--shell-pad) 48px;
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  gap: 56px;
  align-items: start;
}

.hero-copy {
  padding-top: 6px;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--gold);
  margin-bottom: 18px;
  display: block;
}

.hero-copy h1 {
  font-size: 52px;
  line-height: 1.2;
  margin-bottom: 20px;
}

.hero-lead {
  font-size: 16px;
  color: var(--paper-dim);
  line-height: 1.85;
  max-width: 560px;
  margin-bottom: 34px;
}

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

.task-card {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px 18px;
  background: var(--ink-soft);
  border: 1px solid var(--ink-line);
  border-left: 2px solid var(--gold-dim);
  border-radius: var(--radius-sm);
  transition: border-color 0.2s ease, background 0.2s ease;
}

.task-card:hover {
  border-left-color: var(--cyan);
  background: #16233a;
}

.task-index {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--gold);
}

.task-name {
  font-family: var(--font-serif);
  font-size: 17px;
  color: var(--paper);
}

.task-desc {
  font-size: 13px;
  color: var(--mist);
  line-height: 1.65;
}

.hero-media {
  position: relative;
}

.hero-media img {
  aspect-ratio: 4 / 3;
}

.hero-caption {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--mist);
  line-height: 1.7;
  padding-left: 12px;
  border-left: 2px solid var(--gold-dim);
}

.portal-strip {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 var(--shell-pad) 40px;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  background: var(--ink-line);
  border: 1px solid var(--ink-line);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.portal-strip {
  border: none;
  background: transparent;
  gap: 12px;
  padding-bottom: 48px;
}

.portal-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 18px;
  background: var(--ink-soft);
  border: 1px solid var(--ink-line);
  border-radius: var(--radius-sm);
  transition: border-color 0.2s ease;
}

.portal-item:hover {
  border-color: var(--gold-dim);
}

.portal-label {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--cyan);
}

.portal-text {
  font-size: 13px;
  color: var(--mist);
  line-height: 1.65;
}

/* 频道场景矩阵 */

.channels-section {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 56px var(--shell-pad);
  border-top: 1px solid var(--ink-line);
}

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

.channel-figure {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 20px;
  align-items: center;
  margin-bottom: 8px;
}

.channel-figure img {
  aspect-ratio: 16 / 9;
  max-height: 260px;
}

.channel-figure figcaption {
  font-size: 14px;
  color: var(--mist);
  line-height: 1.8;
  padding-left: 16px;
  border-left: 2px solid var(--gold-dim);
}

.channel-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 20px;
  background: var(--ink-soft);
  border: 1px solid var(--ink-line);
  border-radius: var(--radius);
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.channel-card:hover {
  border-color: var(--gold-dim);
  transform: translateY(-2px);
}

.channel-name {
  font-family: var(--font-serif);
  font-size: 19px;
  color: var(--paper);
}

.channel-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.channel-tags span,
.channel-tags li {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--gold);
  padding: 2px 8px;
  border: 1px solid var(--gold-dim);
  border-radius: 2px;
  line-height: 1.6;
}

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

/* 七日日程 + 片单队列 */

.schedule-section {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 56px var(--shell-pad);
  border-top: 1px solid var(--ink-line);
}

.schedule-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
  gap: 32px;
  align-items: start;
}

.week-calendar {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  background: var(--ink-line);
  border: 1px solid var(--ink-line);
  border-radius: var(--radius);
  overflow: hidden;
}

.week-cell {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px;
  background: var(--ink-soft);
  min-height: 104px;
}

.week-day {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--cyan);
}

.week-topic {
  font-family: var(--font-serif);
  font-size: 15px;
  color: var(--paper);
  line-height: 1.4;
}

.week-note {
  font-size: 12px;
  color: var(--mist);
  line-height: 1.6;
}

.topic-queue {
  padding: 20px;
  background: var(--ink-soft);
  border: 1px solid var(--ink-line);
  border-radius: var(--radius);
}

.queue-title {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 400;
  color: var(--gold);
  margin-bottom: 16px;
  line-height: 1.6;
}

.queue-list {
  display: flex;
  flex-direction: column;
}

.queue-item {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px dashed var(--ink-line);
}

.queue-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.queue-link {
  font-size: 15px;
  color: var(--paper);
  flex: 1 1 auto;
}

.queue-link:hover {
  color: var(--cyan);
}

.queue-meta {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--mist);
  white-space: nowrap;
}

/* 精选片单轨道 */

.track-section {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 56px var(--shell-pad);
  border-top: 1px solid var(--ink-line);
}

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

.topic-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 22px 20px;
  background: var(--ink-soft);
  border: 1px solid var(--ink-line);
  border-top: 2px solid var(--gold-dim);
  border-radius: var(--radius);
  transition: border-top-color 0.2s ease, transform 0.2s ease;
}

.topic-card:nth-child(2),
.topic-card:nth-child(5) {
  transform: translateY(14px);
}

.topic-card:hover {
  border-top-color: var(--cyan);
}

.topic-name {
  font-family: var(--font-serif);
  font-size: 19px;
  color: var(--paper);
  line-height: 1.4;
}

.topic-tags {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--gold);
  line-height: 1.7;
}

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

/* 观看准备 + 入口核验摘要 */

.prep-section {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 56px var(--shell-pad);
  border-top: 1px solid var(--ink-line);
}

.prep-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.prep-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 22px 20px;
  background: var(--ink-soft);
  border: 1px solid var(--ink-line);
  border-radius: var(--radius);
}

.prep-title {
  font-family: var(--font-serif);
  font-size: 17px;
  color: var(--paper);
}

.prep-text {
  font-size: 14px;
  color: var(--mist);
  line-height: 1.7;
  flex: 1 1 auto;
}

.prep-link {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--cyan);
  border-bottom: 1px solid var(--gold-dim);
  align-self: flex-start;
  padding-bottom: 2px;
}

.prep-link:hover {
  border-bottom-color: var(--cyan);
}

/* 内容说明 + 问题反馈入口 */

.info-section {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 56px var(--shell-pad) 72px;
  border-top: 1px solid var(--ink-line);
}

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

.info-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 24px 22px;
  background: var(--ink-soft);
  border: 1px solid var(--ink-line);
  border-radius: var(--radius);
}

.info-title {
  font-family: var(--font-serif);
  font-size: 18px;
  color: var(--paper);
}

.info-text {
  font-size: 14px;
  color: var(--mist);
  line-height: 1.75;
  flex: 1 1 auto;
}

.info-link {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--cyan);
  border-bottom: 1px solid var(--gold-dim);
  align-self: flex-start;
  padding-bottom: 2px;
}

.info-link:hover {
  border-bottom-color: var(--cyan);
}

/* --------------------------------------------------------------------------
   pages · 内页通用标题区
   -------------------------------------------------------------------------- */

.page-head,
.page-hero {
  margin-bottom: 48px;
}

.page-head-inner,
.page-hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  gap: 40px;
  align-items: center;
  padding: 32px 0;
  border-top: 1px solid var(--ink-line);
  border-bottom: 1px solid var(--ink-line);
}

.page-head-copy,
.page-hero-copy {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.page-lead,
.page-hero-lead {
  font-size: 16px;
  color: var(--paper-dim);
  line-height: 1.85;
  max-width: 620px;
}

.page-head-media,
.page-hero-media {
  min-width: 0;
}

.page-head-media img,
.page-hero-media img {
  aspect-ratio: 16 / 10;
}

.page-head-media figcaption,
.page-hero-media figcaption,
.media-caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--mist);
  line-height: 1.7;
}

/* 筛选条（频道 / 专题共用） */

.channel-filter,
.topic-filter {
  margin-bottom: 48px;
}

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

.filter-toggle {
  display: none;
  width: 100%;
  min-height: 44px;
  padding: 10px 16px;
  background: var(--ink-soft);
  border: 1px solid var(--ink-line);
  border-radius: var(--radius-sm);
  color: var(--paper);
  font-size: 14px;
  text-align: left;
  position: relative;
}

.filter-toggle::after {
  content: "";
  position: absolute;
  right: 18px;
  top: 50%;
  width: 8px;
  height: 8px;
  border-right: 2px solid var(--gold);
  border-bottom: 2px solid var(--gold);
  transform: translateY(-70%) rotate(45deg);
}

.filter-toggle[aria-expanded="true"]::after {
  transform: translateY(-30%) rotate(-135deg);
}

.filter-drawer {
  display: block;
}

.filter-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.filter-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--paper-dim);
  padding: 6px 14px;
  border: 1px solid var(--ink-line);
  border-radius: 999px;
  line-height: 1.6;
}

.filter-tag:hover {
  color: var(--cyan);
  border-color: var(--gold-dim);
}

/* FAQ 手风琴（指南 / 核验 / 反馈共用） */

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

.faq-item {
  background: var(--ink-soft);
  border: 1px solid var(--ink-line);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.faq-question {
  padding: 16px 44px 16px 20px;
  font-family: var(--font-serif);
  font-size: 16px;
  color: var(--paper);
  cursor: pointer;
  position: relative;
  list-style: none;
  line-height: 1.5;
}

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

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

.faq-item[open] .faq-question::after {
  content: "−";
  color: var(--cyan);
}

.faq-answer {
  padding: 0 20px 18px;
  font-size: 14px;
  color: var(--mist);
  line-height: 1.85;
}

.faq-answer p + p {
  margin-top: 10px;
}

/* --------------------------------------------------------------------------
   pages · 频道页
   -------------------------------------------------------------------------- */

.channel-matrix,
.channel-reading,
.channel-cross {
  margin-bottom: 56px;
}

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

.channel-column {
  display: flex;
  flex-direction: column;
  gap: 20px;
  min-width: 0;
}

.channel-column .channel-card {
  gap: 10px;
}

.channel-column .channel-name {
  font-size: 20px;
}

.channel-bound {
  font-size: 13px;
  color: var(--mist-soft);
  line-height: 1.7;
  padding-top: 10px;
  border-top: 1px dashed var(--ink-line);
}

.channel-link {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--cyan);
  align-self: flex-start;
  border-bottom: 1px solid var(--gold-dim);
  padding-bottom: 2px;
}

.channel-link:hover {
  border-bottom-color: var(--cyan);
}

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

.reading-block {
  padding: 22px 20px;
  background: var(--ink-soft);
  border: 1px solid var(--ink-line);
  border-radius: var(--radius);
}

.reading-title {
  font-family: var(--font-serif);
  font-size: 17px;
  color: var(--paper);
  margin-bottom: 10px;
}

.reading-block p {
  font-size: 14px;
  color: var(--mist);
  line-height: 1.75;
}

.reading-block p + p {
  margin-top: 8px;
}

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

.cross-row {
  display: grid;
  grid-template-columns: 1fr 1.4fr auto;
  gap: 16px;
  align-items: center;
  padding: 16px 4px;
  border-bottom: 1px solid var(--ink-line);
}

.cross-channel {
  font-family: var(--font-serif);
  font-size: 16px;
  color: var(--paper);
}

.cross-topic {
  font-size: 14px;
  color: var(--mist);
}

.cross-link {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--cyan);
  border-bottom: 1px solid var(--gold-dim);
  padding-bottom: 2px;
  white-space: nowrap;
}

.cross-link:hover {
  border-bottom-color: var(--cyan);
}

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

.hero-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  margin-top: 6px;
}

.hero-fact {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding-left: 12px;
  border-left: 2px solid var(--gold-dim);
}

.fact-label {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--mist);
}

.fact-value {
  font-family: var(--font-serif);
  font-size: 16px;
  color: var(--paper);
}

.topic-board,
.topic-archive,
.topic-order {
  margin-bottom: 56px;
}

.board-columns {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr);
  gap: 32px;
  align-items: start;
  margin-top: 24px;
}

.block-title {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 400;
  color: var(--gold);
  margin-bottom: 14px;
  line-height: 1.6;
}

.topic-calendar {
  min-width: 0;
}

.calendar-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--ink-line);
  border: 1px solid var(--ink-line);
  border-radius: var(--radius);
  overflow: hidden;
}

.calendar-day {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 16px;
  background: var(--ink-soft);
  min-height: 92px;
}

.cal-weekday {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--cyan);
}

.cal-topic {
  font-family: var(--font-serif);
  font-size: 15px;
  color: var(--paper);
  line-height: 1.4;
}

.cal-note {
  font-size: 12px;
  color: var(--mist);
  line-height: 1.6;
}

.topic-list {
  min-width: 0;
}

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

.topic-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 4px 16px;
  padding: 16px 4px;
  border-bottom: 1px solid var(--ink-line);
}

.topic-row .topic-name {
  font-size: 17px;
  grid-column: 1;
}

.topic-row .topic-tags {
  grid-column: 1;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--gold);
}

.topic-row .topic-desc {
  grid-column: 1;
  font-size: 14px;
  color: var(--mist);
  line-height: 1.7;
}

.topic-row .topic-link {
  grid-column: 2;
  grid-row: 1 / span 3;
  align-self: center;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--cyan);
  border-bottom: 1px solid var(--gold-dim);
  padding-bottom: 2px;
  white-space: nowrap;
}

.topic-row .topic-link:hover {
  border-bottom-color: var(--cyan);
}

.archive-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px 32px;
  margin-top: 24px;
}

.archive-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.archive-item a {
  display: block;
  padding: 12px 0;
  border-bottom: 1px solid var(--ink-line);
  font-size: 15px;
  color: var(--paper-dim);
}

.archive-item a:hover {
  color: var(--cyan);
}

.order-steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
  margin-top: 24px;
}

.order-step {
  padding: 22px 20px;
  background: var(--ink-soft);
  border: 1px solid var(--ink-line);
  border-radius: var(--radius);
}

.order-num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--gold);
  display: block;
  margin-bottom: 8px;
}

.order-heading {
  font-family: var(--font-serif);
  font-size: 17px;
  color: var(--paper);
  margin-bottom: 8px;
}

.order-text {
  font-size: 14px;
  color: var(--mist);
  line-height: 1.75;
}

.order-tail {
  margin-top: 24px;
  font-size: 14px;
  color: var(--mist);
}

.order-tail a {
  color: var(--cyan);
  border-bottom: 1px solid var(--gold-dim);
  margin-right: 6px;
}

.order-tail a:hover {
  border-bottom-color: var(--cyan);
}

/* --------------------------------------------------------------------------
   pages · 观看指南
   -------------------------------------------------------------------------- */

.guide-article {
  display: block;
}

.guide-section {
  margin-bottom: 52px;
  padding-top: 8px;
}

.article-toc {
  margin-bottom: 40px;
  border-top: 1px solid var(--ink-line);
  border-bottom: 1px solid var(--ink-line);
  padding: 14px 0;
}

.toc-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.toc-item a {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--paper-dim);
  padding: 6px 14px;
  border: 1px solid var(--ink-line);
  border-radius: 999px;
  line-height: 1.6;
}

.toc-item a:hover {
  color: var(--cyan);
  border-color: var(--gold-dim);
}

.check-list {
  display: flex;
  flex-direction: column;
  gap: 1px;
  background: var(--ink-line);
  border: 1px solid var(--ink-line);
  border-radius: var(--radius);
  overflow: hidden;
}

.check-row {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1.4fr);
  gap: 20px;
  align-items: start;
  padding: 18px 20px;
  background: var(--ink-soft);
}

.check-main {
  font-family: var(--font-serif);
  font-size: 16px;
  color: var(--paper);
  line-height: 1.6;
}

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

.check-note {
  font-size: 14px;
  color: var(--mist);
  line-height: 1.75;
}

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

.step-item {
  position: relative;
  padding: 20px 22px 20px 66px;
  background: var(--ink-soft);
  border: 1px solid var(--ink-line);
  border-radius: var(--radius);
}

.step-index {
  position: absolute;
  left: 20px;
  top: 20px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--gold);
  padding: 2px 8px;
  border: 1px solid var(--gold-dim);
  border-radius: 2px;
  line-height: 1.6;
}

.step-title {
  font-family: var(--font-serif);
  font-size: 17px;
  color: var(--paper);
  margin-bottom: 8px;
}

.step-desc {
  font-size: 14px;
  color: var(--mist);
  line-height: 1.8;
}

.step-next {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--cyan);
  line-height: 1.7;
}

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

.timing-card {
  padding: 20px;
  background: var(--ink-soft);
  border: 1px solid var(--ink-line);
  border-left: 2px solid var(--gold-dim);
  border-radius: var(--radius-sm);
}

.timing-title {
  font-family: var(--font-serif);
  font-size: 16px;
  color: var(--paper);
  margin-bottom: 8px;
}

.timing-desc {
  font-size: 14px;
  color: var(--mist);
  line-height: 1.75;
}

.selfcheck-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.selfcheck-card {
  padding: 20px;
  background: var(--ink-soft);
  border: 1px solid var(--ink-line);
  border-radius: var(--radius);
}

.selfcheck-title {
  font-family: var(--font-serif);
  font-size: 16px;
  color: var(--paper);
  margin-bottom: 8px;
}

.selfcheck-desc {
  font-size: 14px;
  color: var(--mist);
  line-height: 1.75;
}

/* --------------------------------------------------------------------------
   pages · 入口核验
   -------------------------------------------------------------------------- */

.verify-checklist,
.verify-table-section,
.verify-record,
.verify-faq,
.verify-next {
  margin-bottom: 56px;
}

.checklist-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.check-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 22px 20px;
  background: var(--ink-soft);
  border: 1px solid var(--ink-line);
  border-top: 2px solid var(--brick);
  border-radius: var(--radius);
}

.check-index {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--brick);
}

.check-title {
  font-family: var(--font-serif);
  font-size: 17px;
  color: var(--paper);
}

.check-body {
  font-size: 14px;
  color: var(--mist);
  line-height: 1.75;
}

.check-pair {
  margin: 0;
  padding-top: 10px;
  border-top: 1px dashed var(--ink-line);
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 4px 10px;
  font-size: 13px;
}

.check-pair dt {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--gold);
  line-height: 1.9;
}

.check-pair dd {
  margin: 0;
  color: var(--mist);
  line-height: 1.7;
}

.table-scroll {
  overflow-x: auto;
  border: 1px solid var(--ink-line);
  border-radius: var(--radius);
}

.verify-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 640px;
  font-size: 14px;
}

.verify-table caption {
  caption-side: top;
  text-align: left;
  padding: 14px 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--mist);
  background: var(--ink-soft);
  border-bottom: 1px solid var(--ink-line);
}

.verify-table th,
.verify-table td {
  padding: 14px 16px;
  text-align: left;
  border-bottom: 1px solid var(--ink-line);
  line-height: 1.7;
  vertical-align: top;
}

.verify-table thead th {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  color: var(--gold);
  background: var(--ink-soft);
  white-space: nowrap;
}

.verify-table tbody th {
  font-family: var(--font-serif);
  font-size: 15px;
  font-weight: 600;
  color: var(--paper);
  white-space: nowrap;
}

.verify-table tbody td {
  color: var(--mist);
}

.verify-table tbody tr:last-child th,
.verify-table tbody tr:last-child td {
  border-bottom: none;
}

.record-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
  counter-reset: record;
}

.record-item {
  padding: 18px 20px 18px 56px;
  background: var(--ink-soft);
  border: 1px solid var(--ink-line);
  border-radius: var(--radius-sm);
  position: relative;
}

.record-item::before {
  counter-increment: record;
  content: counter(record, decimal-leading-zero);
  position: absolute;
  left: 18px;
  top: 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--gold);
}

.record-title {
  font-family: var(--font-serif);
  font-size: 16px;
  color: var(--paper);
  margin-bottom: 6px;
}

.record-item p {
  font-size: 14px;
  color: var(--mist);
  line-height: 1.75;
}

.record-tail {
  margin-top: 20px;
  font-size: 14px;
  color: var(--mist);
}

.record-tail a {
  color: var(--cyan);
  border-bottom: 1px solid var(--gold-dim);
  margin-right: 6px;
}

.record-tail a:hover {
  border-bottom-color: var(--cyan);
}

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

.next-item a {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 20px;
  background: var(--ink-soft);
  border: 1px solid var(--ink-line);
  border-radius: var(--radius);
  height: 100%;
  transition: border-color 0.2s ease;
}

.next-item a:hover {
  border-color: var(--gold-dim);
}

.next-name {
  font-family: var(--font-serif);
  font-size: 17px;
  color: var(--paper);
}

.next-desc {
  font-size: 13px;
  color: var(--mist);
  line-height: 1.7;
}

/* --------------------------------------------------------------------------
   pages · 内容说明
   -------------------------------------------------------------------------- */

.page-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 48px;
  align-items: start;
}

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

.article-aside {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 24px;
  position: sticky;
  top: calc(var(--header-h) + 24px);
}

.content-section {
  margin-bottom: 48px;
}

.content-section h2 {
  font-size: 26px;
  margin-bottom: 14px;
}

.content-section > p {
  font-size: 15px;
  color: var(--paper-dim);
  line-height: 1.85;
  margin-bottom: 18px;
}

.rule-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
  counter-reset: rule;
}

.rule-item {
  padding: 18px 20px 18px 58px;
  background: var(--ink-soft);
  border: 1px solid var(--ink-line);
  border-radius: var(--radius-sm);
  position: relative;
}

.rule-item::before {
  counter-increment: rule;
  content: counter(rule, decimal-leading-zero);
  position: absolute;
  left: 18px;
  top: 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--gold);
}

.rule-item h3 {
  font-family: var(--font-serif);
  font-size: 16px;
  color: var(--paper);
  margin-bottom: 6px;
}

.rule-item p {
  font-size: 14px;
  color: var(--mist);
  line-height: 1.75;
}

.rule-example {
  margin-top: 8px;
  padding-left: 12px;
  border-left: 2px solid var(--gold-dim);
  font-size: 13px;
  color: var(--mist-soft);
}

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

.standard-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 4px 14px;
  padding: 16px 20px;
  background: var(--ink-soft);
  border: 1px solid var(--ink-line);
  border-radius: var(--radius-sm);
}

.standard-num {
  grid-row: 1 / span 2;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--cyan);
  line-height: 1.9;
}

.standard-item h3 {
  font-family: var(--font-serif);
  font-size: 16px;
  color: var(--paper);
}

.standard-item p {
  font-size: 14px;
  color: var(--mist);
  line-height: 1.75;
}

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

.maintenance-block {
  padding: 20px;
  background: var(--ink-soft);
  border: 1px solid var(--ink-line);
  border-radius: var(--radius);
}

.maintenance-block h3 {
  font-family: var(--font-serif);
  font-size: 16px;
  color: var(--paper);
  margin-bottom: 8px;
}

.maintenance-block p {
  font-size: 14px;
  color: var(--mist);
  line-height: 1.75;
}

.maintenance-block p + p {
  margin-top: 8px;
}

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

.boundary-item {
  padding: 16px 20px;
  background: var(--ink-soft);
  border: 1px solid var(--ink-line);
  border-left: 2px solid var(--brick);
  border-radius: var(--radius-sm);
}

.boundary-item h3 {
  font-family: var(--font-serif);
  font-size: 16px;
  color: var(--paper);
  margin-bottom: 6px;
}

.boundary-item p {
  font-size: 14px;
  color: var(--mist);
  line-height: 1.75;
}

.aside-block {
  padding: 20px;
  background: var(--ink-soft);
  border: 1px solid var(--ink-line);
  border-radius: var(--radius);
}

.aside-title {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 400;
  color: var(--gold);
  margin-bottom: 14px;
  line-height: 1.6;
}

.glossary-list {
  margin: 0;
}

.glossary-row {
  padding: 10px 0;
  border-bottom: 1px dashed var(--ink-line);
}

.glossary-row:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.glossary-row dt {
  font-family: var(--font-serif);
  font-size: 15px;
  color: var(--paper);
  margin-bottom: 2px;
}

.glossary-row dd {
  margin: 0;
  font-size: 13px;
  color: var(--mist);
  line-height: 1.7;
}

.related-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.related-list a {
  display: block;
  padding: 10px 0;
  font-size: 14px;
  color: var(--paper-dim);
  border-bottom: 1px dashed var(--ink-line);
}

.related-list a:hover {
  color: var(--cyan);
}

.related-list li:last-child a {
  border-bottom: none;
}

/* --------------------------------------------------------------------------
   pages · 问题反馈
   -------------------------------------------------------------------------- */

.page-shell {
  max-width: var(--shell);
  margin: 0 auto;
}

.feedback-types,
.feedback-points,
.feedback-flow,
.feedback-faq {
  margin-bottom: 56px;
}

.feedback-type-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.feedback-type-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 22px 20px;
  background: var(--ink-soft);
  border: 1px solid var(--ink-line);
  border-top: 2px solid var(--gold-dim);
  border-radius: var(--radius);
}

.type-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--gold);
  line-height: 1.7;
}

.type-name {
  font-family: var(--font-serif);
  font-size: 17px;
  color: var(--paper);
}

.type-text {
  font-size: 14px;
  color: var(--mist);
  line-height: 1.75;
  flex: 1 1 auto;
}

.type-hint {
  font-size: 12px;
  color: var(--mist-soft);
  line-height: 1.7;
  padding-top: 8px;
  border-top: 1px dashed var(--ink-line);
}

.points-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.point-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 16px;
  padding: 18px 20px;
  background: var(--ink-soft);
  border: 1px solid var(--ink-line);
  border-radius: var(--radius-sm);
}

.point-index {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--cyan);
  line-height: 1.9;
}

.point-title {
  font-family: var(--font-serif);
  font-size: 16px;
  color: var(--paper);
  margin-bottom: 6px;
}

.point-text {
  font-size: 14px;
  color: var(--mist);
  line-height: 1.75;
}

.flow-timeline {
  display: flex;
  flex-direction: column;
  position: relative;
  padding-left: 32px;
}

.flow-timeline::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: var(--ink-line);
}

.flow-step {
  position: relative;
  padding: 0 0 28px 0;
}

.flow-step:last-child {
  padding-bottom: 0;
}

.flow-marker {
  position: absolute;
  left: -32px;
  top: 6px;
  width: 19px;
  height: 19px;
  border: 2px solid var(--gold);
  border-radius: 50%;
  background: var(--ink);
}

.flow-step:last-child .flow-marker {
  border-color: var(--cyan);
}

.flow-title {
  font-family: var(--font-serif);
  font-size: 17px;
  color: var(--paper);
  margin-bottom: 6px;
}

.flow-text {
  font-size: 14px;
  color: var(--mist);
  line-height: 1.8;
}

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

.site-error .error-main {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 80px var(--shell-pad) 96px;
}

.error-hero {
  max-width: 640px;
  margin-bottom: 64px;
}

.error-code {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--brick);
  margin-bottom: 16px;
  display: block;
}

.error-title {
  font-size: 44px;
  margin-bottom: 18px;
  line-height: 1.24;
}

.error-text {
  font-size: 16px;
  color: var(--mist);
  line-height: 1.85;
  margin-bottom: 28px;
}

.error-home-btn {
  display: inline-block;
  padding: 12px 28px;
  background: var(--gold);
  color: var(--ink-deep);
  font-size: 15px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--gold);
}

.error-home-btn:hover {
  background: var(--cyan);
  border-color: var(--cyan);
  color: var(--ink-deep);
}

.error-paths {
  margin-bottom: 56px;
}

.error-paths-title {
  font-size: 24px;
  margin-bottom: 24px;
}

.error-path-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.error-path-item {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 20px;
  background: var(--ink-soft);
  border: 1px solid var(--ink-line);
  border-radius: var(--radius);
}

.error-path-name {
  font-family: var(--font-serif);
  font-size: 17px;
  color: var(--paper);
}

.error-path-desc {
  font-size: 13px;
  color: var(--mist);
  line-height: 1.7;
  flex: 1 1 auto;
}

.error-path-link {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--cyan);
  align-self: flex-start;
  border-bottom: 1px solid var(--gold-dim);
  padding-bottom: 2px;
}

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

.error-note {
  padding-top: 32px;
  border-top: 1px solid var(--ink-line);
}

.error-note-title {
  font-size: 20px;
  margin-bottom: 12px;
}

.error-note-text {
  font-size: 15px;
  color: var(--mist);
  line-height: 1.85;
  margin-bottom: 16px;
  max-width: 720px;
}

.error-note-links {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
}

.error-note-links a {
  font-size: 14px;
  color: var(--cyan);
  border-bottom: 1px solid var(--gold-dim);
  padding-bottom: 2px;
}

.error-note-links a:hover {
  border-bottom-color: var(--cyan);
}

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

@media (max-width: 1024px) {
  .hero-inner {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.92fr);
    gap: 36px;
  }

  .hero-copy h1 {
    font-size: 42px;
  }

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

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

  .topic-card:nth-child(2),
  .topic-card:nth-child(5) {
    transform: none;
  }

  .prep-grid,
  .selfcheck-grid,
  .checklist-grid,
  .feedback-type-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .timing-grid,
  .reading-grid,
  .maintenance-grid,
  .order-steps,
  .next-links,
  .info-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .page-layout {
    grid-template-columns: minmax(0, 1fr) 280px;
    gap: 36px;
  }

  .footer-inner {
    grid-template-columns: 1.4fr repeat(2, 1fr);
    gap: 32px;
  }

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

@media (max-width: 768px) {
  :root {
    --shell-pad: 18px;
    --header-h: 64px;
  }

  body {
    font-size: 15px;
  }

  /* 页头与移动导航 */
  .header-inner {
    position: relative;
  }

  .brand {
    font-size: 18px;
  }

  .nav-toggle {
    display: block;
  }

  .site-nav {
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: var(--ink-deep);
    border-bottom: 1px solid var(--ink-line);
    padding: 8px var(--shell-pad) 16px;
    max-height: calc(100vh - var(--header-h));
    overflow-y: auto;
  }

  .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    width: 100%;
  }

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

  .nav-link {
    padding: 12px 4px;
    min-height: 44px;
    display: flex;
    align-items: center;
    border-bottom: 1px solid var(--ink-line);
  }

  .nav-link.is-current {
    border-bottom-color: var(--ink-line);
    color: var(--cyan);
  }

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

  .breadcrumb {
    padding-top: 18px;
    font-size: 12px;
  }

  .page-header {
    padding: 16px 0 20px;
    margin-bottom: 28px;
  }

  .page-title {
    font-size: 32px;
    line-height: 1.3;
  }

  .section-head h2,
  .section-title {
    font-size: 23px;
  }

  .section-head--offset {
    padding-left: 0;
  }

  .section-desc,
  .section-note,
  .section-intro {
    font-size: 14px;
  }

  /* 首页首屏 */
  .hero-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 28px;
    padding: 32px var(--shell-pad) 32px;
  }

  .hero-copy h1 {
    font-size: 32px;
    line-height: 1.3;
  }

  .hero-lead {
    font-size: 15px;
    margin-bottom: 24px;
  }

  .hero-tasks {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
  }

  .task-card {
    padding: 14px;
    min-height: 44px;
  }

  .task-name {
    font-size: 15px;
  }

  .task-desc {
    font-size: 12px;
  }

  .hero-media {
    order: 0;
  }

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

  .portal-strip {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
    padding-bottom: 36px;
  }

  .portal-item {
    padding: 14px;
  }

  /* 首页频道矩阵 */
  .channels-section,
  .schedule-section,
  .track-section,
  .prep-section,
  .info-section {
    padding: 40px var(--shell-pad);
  }

  .channel-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 12px;
  }

  .channel-figure {
    grid-template-columns: minmax(0, 1fr);
    gap: 12px;
  }

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

  .channel-figure figcaption {
    padding-left: 12px;
  }

  .channel-card {
    padding: 16px;
  }

  /* 首页日程 */
  .schedule-layout {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
  }

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

  .week-cell {
    min-height: 0;
    padding: 14px 16px;
  }

  .topic-queue {
    padding: 16px;
  }

  .queue-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 2px;
  }

  /* 首页片单轨道与摘要 */
  .track-rail {
    grid-template-columns: minmax(0, 1fr);
    gap: 12px;
  }

  .prep-grid,
  .info-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 12px;
  }

  .prep-card,
  .info-card {
    padding: 18px;
  }

  /* 内页标题区 */
  .page-head,
  .page-hero {
    margin-bottom: 32px;
  }

  .page-head-inner,
  .page-hero-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 20px;
    padding: 24px 0;
  }

  .page-lead,
  .page-hero-lead {
    font-size: 15px;
  }

  .page-head-media img,
  .page-hero-media img {
    aspect-ratio: 16 / 10;
  }

  /* 筛选条 */
  .channel-filter,
  .topic-filter {
    margin-bottom: 32px;
  }

  .filter-toggle {
    display: block;
  }

  .filter-drawer {
    display: none;
    margin-top: 12px;
  }

  .filter-drawer.is-open {
    display: block;
  }

  .filter-tags {
    gap: 8px;
  }

  .filter-tag {
    font-size: 12px;
    padding: 6px 12px;
    min-height: 36px;
    display: inline-flex;
    align-items: center;
  }

  /* 频道页 */
  .channel-matrix,
  .channel-reading,
  .channel-cross {
    margin-bottom: 40px;
  }

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

  .channel-column {
    gap: 14px;
  }

  .reading-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 12px;
  }

  .cross-row {
    grid-template-columns: minmax(0, 1fr);
    gap: 4px;
    padding: 14px 0;
  }

  .cross-link {
    justify-self: start;
    margin-top: 4px;
  }

  /* 专题页 */
  .topic-board,
  .topic-archive,
  .topic-order {
    margin-bottom: 40px;
  }

  .hero-facts {
    gap: 14px;
  }

  .board-columns {
    grid-template-columns: minmax(0, 1fr);
    gap: 28px;
    margin-top: 16px;
  }

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

  .calendar-day {
    min-height: 0;
    padding: 12px 16px;
  }

  .topic-row {
    grid-template-columns: minmax(0, 1fr);
    gap: 4px;
    padding: 14px 0;
  }

  .topic-row .topic-link {
    grid-column: 1;
    grid-row: auto;
    align-self: start;
    margin-top: 6px;
    justify-self: start;
  }

  .archive-columns {
    grid-template-columns: minmax(0, 1fr);
    gap: 0;
    margin-top: 16px;
  }

  .order-steps {
    grid-template-columns: minmax(0, 1fr);
    gap: 12px;
    margin-top: 16px;
  }

  /* 指南页 */
  .article-toc {
    margin-bottom: 28px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  .toc-list {
    flex-wrap: nowrap;
    gap: 8px;
    padding-bottom: 4px;
  }

  .toc-item a {
    white-space: nowrap;
    font-size: 12px;
  }

  .guide-section {
    margin-bottom: 36px;
  }

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

  .step-item {
    padding: 18px 18px 18px 18px;
  }

  .step-index {
    position: static;
    display: inline-block;
    margin-bottom: 10px;
  }

  .timing-grid,
  .selfcheck-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 12px;
  }

  /* 核验页 */
  .verify-checklist,
  .verify-table-section,
  .verify-record,
  .verify-faq,
  .verify-next {
    margin-bottom: 40px;
  }

  .checklist-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 12px;
  }

  .table-scroll {
    overflow-x: auto;
  }

  .verify-table {
    min-width: 560px;
  }

  .next-links {
    grid-template-columns: minmax(0, 1fr);
    gap: 12px;
  }

  /* 内容说明页 */
  .page-layout {
    grid-template-columns: minmax(0, 1fr);
    gap: 32px;
  }

  .article-aside {
    position: static;
  }

  .content-section {
    margin-bottom: 36px;
  }

  .content-section h2 {
    font-size: 22px;
  }

  .maintenance-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 12px;
  }

  .rule-item {
    padding: 16px 16px 16px 16px;
  }

  .rule-item::before {
    position: static;
    display: block;
    margin-bottom: 6px;
  }

  /* 反馈页 */
  .feedback-types,
  .feedback-points,
  .feedback-flow,
  .feedback-faq {
    margin-bottom: 40px;
  }

  .feedback-type-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 12px;
  }

  .point-item {
    grid-template-columns: minmax(0, 1fr);
    gap: 6px;
    padding: 16px;
  }

  .flow-timeline {
    padding-left: 28px;
  }

  .flow-marker {
    left: -28px;
  }

  /* FAQ */
  .faq-question {
    padding: 14px 40px 14px 16px;
    font-size: 15px;
  }

  .faq-answer {
    padding: 0 16px 16px;
    font-size: 13px;
  }

  /* 404 */
  .site-error .error-main {
    padding: 48px var(--shell-pad) 64px;
  }

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

  .error-title {
    font-size: 30px;
  }

  .error-text {
    font-size: 15px;
  }

  .error-home-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    padding: 10px 24px;
  }

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

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

  .error-note-title {
    font-size: 18px;
  }

  .error-note-links {
    flex-direction: column;
    gap: 12px;
  }

  /* 页脚 */
  .site-footer {
    padding-top: 40px;
  }

  .footer-inner {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 28px 20px;
    padding-bottom: 32px;
  }

  .footer-brand {
    grid-column: 1 / -1;
    padding-right: 0;
  }

  .footer-list a {
    min-height: 32px;
    display: inline-flex;
    align-items: center;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 6px;
    padding: 16px var(--shell-pad) 24px;
  }
}

@media (max-width: 420px) {
  .hero-tasks {
    grid-template-columns: minmax(0, 1fr);
  }

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

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

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}

/* 程序验收反馈：修复网格孤项 */
@media (min-width: 769px) {
  .channel-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}