/* ============================================================
   糖心vlog官网 · lfzswz.com
   全站样式表（单文件）
   设计方向：高端服务风 / 浅暖灰底 / 糖渍玫瑰点缀
   ============================================================ */

/* ============================================================
   1. Base —— 设计变量、重置与全局基础
   ============================================================ */

:root {
  /* 色板 */
  --color-bg: #F7F4F0;
  --color-card: #FFFFFF;
  --color-ink: #201E1C;
  --color-text: #3F3A36;
  --color-muted: #75706A;
  --color-accent: #A4687B;
  --color-accent-soft: #E8D8DE;
  --color-line: #E3DAD3;
  --color-block: #F1EAE4;
  --color-accent-deep: #8A5265;

  /* 字体 */
  --font-sans: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, 'SF Mono', Menlo, Consolas, monospace;

  /* 布局 */
  --container-w: 1200px;
  --content-w: 780px;
  --gutter: 24px;
  --radius: 6px;
  --radius-sm: 4px;
  --header-h: 64px;

  /* 阴影 */
  --shadow-sm: 0 1px 2px rgba(32, 30, 28, 0.04);
  --shadow-card: 0 1px 3px rgba(32, 30, 28, 0.06);

  /* 过渡 */
  --transition: 0.2s ease;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--color-bg);
  color: var(--color-text);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

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

ul,
ol {
  list-style-position: inside;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

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

/* 焦点可见性 */
a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* ============================================================
   2. Layout —— 页头、页脚、主容器与通用骨架
   ============================================================ */

.site-header {
  background: var(--color-card);
  border-bottom: 1px solid var(--color-line);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 var(--gutter);
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-link {
  display: inline-flex;
  align-items: center;
  font-size: 20px;
  font-weight: 700;
  color: var(--color-ink);
  letter-spacing: 0.02em;
}

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

.brand-text {
  line-height: 1.2;
}

.brand-text::after {
  content: '';
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent);
  margin-left: 6px;
  vertical-align: middle;
}

/* 目录按钮 */
.nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-ink);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 8px 16px;
  background: var(--color-card);
  transition: background var(--transition), border-color var(--transition);
}

.nav-toggle:hover {
  background: var(--color-block);
  border-color: var(--color-accent-soft);
}

.nav-toggle::after {
  content: '';
  width: 0;
  height: 0;
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
  border-top: 6px solid var(--color-accent);
  transition: transform var(--transition);
}

/* 全屏导航索引层 */
.site-nav {
  position: fixed;
  inset: 0;
  background: var(--color-bg);
  z-index: 200;
  overflow-y: auto;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity 0.25s ease, transform 0.25s ease, visibility 0s linear 0.25s;
}

.site-nav.is-open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  transition: opacity 0.25s ease, transform 0.25s ease, visibility 0s;
}

.nav-overlay-header {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 var(--gutter);
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--color-line);
}

.nav-overlay-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-ink);
}

.nav-close {
  font-size: 15px;
  color: var(--color-muted);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 6px 14px;
  transition: background var(--transition), color var(--transition);
}

.nav-close:hover {
  background: var(--color-card);
  color: var(--color-ink);
}

.nav-links {
  list-style: none;
  max-width: 720px;
  margin: 48px auto 0;
  padding: 0 var(--gutter);
  display: grid;
  gap: 8px;
}

.nav-links li {
  border-bottom: 1px solid var(--color-line);
}

.nav-links a {
  display: block;
  padding: 14px 4px;
  font-size: 20px;
  font-weight: 500;
  color: var(--color-text);
  transition: color var(--transition), padding-left var(--transition);
}

.nav-links a:hover {
  color: var(--color-accent);
  padding-left: 12px;
}

.nav-links a.is-current {
  color: var(--color-accent-deep);
  font-weight: 600;
}

.nav-links a.is-current::before {
  content: '·';
  color: var(--color-accent);
  margin-right: 8px;
  font-weight: 700;
}

.nav-overview {
  max-width: 720px;
  margin: 32px auto 64px;
  padding: 0 var(--gutter);
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.7;
}

/* 主容器 */
.site-main {
  min-height: 60vh;
}

.site-main.inner-main {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 40px var(--gutter) 80px;
}

/* 面包屑 */
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 14px;
  color: var(--color-muted);
  margin-bottom: 28px;
}

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

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

.breadcrumb-sep {
  color: var(--color-line);
  font-size: 12px;
}

.breadcrumb-current {
  color: var(--color-text);
  font-weight: 500;
}

/* 页头标题区 */
.page-header {
  margin-bottom: 48px;
  max-width: var(--content-w);
}

.page-title {
  font-size: 38px;
  line-height: 1.25;
  font-weight: 700;
  color: var(--color-ink);
  margin-bottom: 16px;
  letter-spacing: 0.01em;
}

.page-description {
  font-size: 17px;
  line-height: 1.8;
  color: var(--color-text);
  max-width: 680px;
}

/* ============================================================
   3. Components —— 通用组件：按钮、卡片、图像、表格、FAQ 等
   ============================================================ */

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 500;
  line-height: 1;
  padding: 14px 24px;
  border-radius: var(--radius);
  transition: background var(--transition), color var(--transition), border-color var(--transition);
  min-height: 48px;
}

.btn-primary {
  background: var(--color-accent);
  color: #fff;
  border: 1px solid var(--color-accent);
}

.btn-primary:hover {
  background: var(--color-accent-deep);
  border-color: var(--color-accent-deep);
  color: #fff;
}

.btn-quiet {
  background: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-line);
}

.btn-quiet:hover {
  background: var(--color-card);
  border-color: var(--color-accent);
  color: var(--color-accent-deep);
}

/* 文章内图像 */
figure {
  margin: 0;
}

figure img {
  width: 100%;
  height: auto;
  border-radius: var(--radius);
}

figcaption {
  font-size: 13px;
  color: var(--color-muted);
  line-height: 1.6;
  margin-top: 10px;
  text-align: left;
}

/* 文本区块通用标题 */
h2 {
  font-size: 24px;
  line-height: 1.4;
  font-weight: 700;
  color: var(--color-ink);
}

h3 {
  font-size: 18px;
  line-height: 1.5;
  font-weight: 600;
  color: var(--color-ink);
}

p {
  line-height: 1.8;
}

/* 表格通用 */
.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background: var(--color-card);
}

.data-table,
.field-data-table,
.exclude-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
  min-width: 560px;
}

.data-table th,
.data-table td,
.field-data-table th,
.field-data-table td,
.exclude-table th,
.exclude-table td {
  text-align: left;
  padding: 14px 18px;
  border-bottom: 1px solid var(--color-line);
  vertical-align: top;
  line-height: 1.7;
}

.data-table thead th,
.field-data-table thead th,
.exclude-table thead th {
  background: var(--color-block);
  font-weight: 600;
  color: var(--color-ink);
  font-size: 14px;
  white-space: nowrap;
}

.data-table tbody tr:last-child td,
.field-data-table tbody tr:last-child td,
.exclude-table tbody tr:last-child td {
  border-bottom: none;
}

/* details / FAQ 基础 */
details {
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background: var(--color-card);
}

summary {
  cursor: pointer;
  font-weight: 500;
  padding: 16px 20px;
  color: var(--color-ink);
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  transition: color var(--transition);
}

summary::-webkit-details-marker {
  display: none;
}

summary::after {
  content: '+';
  font-size: 20px;
  font-weight: 400;
  color: var(--color-accent);
  flex-shrink: 0;
  transition: transform var(--transition);
}

details[open] summary::after {
  transform: rotate(45deg);
}

details summary:hover {
  color: var(--color-accent-deep);
}

/* 返回顶部按钮（滚动到页脚附近出现，JS 控制可见性） */
.back-to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 90;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--color-card);
  border: 1px solid var(--color-line);
  color: var(--color-accent-deep);
  font-size: 18px;
  display: none;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-card);
  transition: background var(--transition), border-color var(--transition);
}

.back-to-top.is-visible {
  display: inline-flex;
}

.back-to-top:hover {
  background: var(--color-block);
  border-color: var(--color-accent);
}

/* ============================================================
   4. Pages —— 首页
   ============================================================ */

.home-main {
  overflow: visible;
}

/* --- 首屏任务组 --- */
.hero-task {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 64px var(--gutter) 56px;
  display: grid;
  grid-template-columns: 3fr 2fr;
  gap: 56px;
  align-items: center;
}

.hero-copy {
  max-width: 680px;
}

.home-title {
  font-size: 42px;
  line-height: 1.25;
  font-weight: 700;
  color: var(--color-ink);
  margin-bottom: 20px;
  letter-spacing: 0.01em;
}

.hero-lead {
  font-size: 17px;
  line-height: 1.85;
  color: var(--color-text);
  margin-bottom: 32px;
  max-width: 600px;
}

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

.hero-note {
  font-size: 13px;
  color: var(--color-muted);
  max-width: 520px;
  line-height: 1.7;
}

.hero-media {
  position: relative;
}

.hero-media img {
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
}

.hero-media figcaption {
  font-size: 13px;
  color: var(--color-muted);
  margin-top: 12px;
}

/* --- 频道方向四分区 --- */
.channel-direction {
  background: var(--color-card);
  border-top: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
  padding: 64px 0;
}

.section-heading {
  max-width: var(--container-w);
  margin: 0 auto 40px;
  padding: 0 var(--gutter);
}

.section-heading h2 {
  margin-bottom: 8px;
}

.section-heading p {
  color: var(--color-muted);
  max-width: 680px;
  font-size: 15px;
}

.direction-grid {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 var(--gutter);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.direction-card {
  background: var(--color-bg);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 28px 22px;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.direction-card:hover {
  border-color: var(--color-accent-soft);
  box-shadow: var(--shadow-card);
}

.direction-card h3 {
  font-size: 17px;
  margin-bottom: 10px;
  position: relative;
  padding-left: 16px;
}

.direction-card h3::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  width: 4px;
  height: 16px;
  background: var(--color-accent);
  border-radius: 2px;
}

.direction-card p {
  font-size: 14px;
  color: var(--color-text);
  line-height: 1.75;
  margin-bottom: 16px;
}

.direction-card a {
  font-size: 14px;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.direction-card a::after {
  content: '→';
  transition: transform var(--transition);
}

.direction-card a:hover::after {
  transform: translateX(4px);
}

/* --- 三步骤阅读路径带 --- */
.reading-path {
  padding: 72px 0;
}

.path-steps {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 var(--gutter);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  counter-reset: path-step;
}

.path-step {
  position: relative;
  background: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 32px 26px 26px;
}

.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--color-accent);
  color: #fff;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 18px;
}

.path-step h3 {
  font-size: 18px;
  margin-bottom: 8px;
}

.path-step h3 a {
  color: var(--color-ink);
}

.path-step h3 a:hover {
  color: var(--color-accent-deep);
}

.path-step p {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.75;
}

/* --- 概念解释双栏带 --- */
.concept-explainer {
  background: var(--color-block);
  border-top: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
  padding: 64px 0;
}

.concept-explainer {
  max-width: var(--container-w);
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 56px;
  align-items: start;
}

.explainer-left h2 {
  margin-bottom: 12px;
}

.explainer-intro {
  color: var(--color-muted);
  font-size: 15px;
  margin-bottom: 32px;
  max-width: 560px;
}

.term-item {
  background: var(--color-card);
  border-radius: var(--radius);
  padding: 20px 24px;
  margin-bottom: 12px;
  border-left: 3px solid var(--color-accent);
}

.term-item h3 {
  font-size: 16px;
  margin-bottom: 6px;
}

.term-item p {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.7;
}

.explainer-right {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.explainer-figure img {
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
}

.explainer-figure figcaption {
  font-size: 13px;
  color: var(--color-muted);
  margin-top: 10px;
}

.path-card {
  background: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 24px;
}

.path-card h3 {
  font-size: 16px;
  margin-bottom: 8px;
}

.path-card p {
  font-size: 14px;
  color: var(--color-muted);
  margin-bottom: 12px;
  line-height: 1.7;
}

.path-card a {
  font-size: 14px;
  font-weight: 500;
}

/* --- 误区与收录入口卡 --- */
.boundary-entry {
  padding: 72px 0;
}

.entry-grid {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 var(--gutter);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.entry-card {
  background: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 32px 28px;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.entry-card:hover {
  border-color: var(--color-accent-soft);
  box-shadow: var(--shadow-card);
}

.entry-card h3 {
  font-size: 18px;
  margin-bottom: 10px;
}

.entry-card p {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.75;
  margin-bottom: 16px;
}

.entry-card a {
  font-size: 14px;
  font-weight: 500;
}

/* 首页底部相关链接 */
.related-links {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 var(--gutter) 72px;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
  border-top: 1px solid var(--color-line);
  padding-top: 40px;
}

.related-links-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-ink);
}

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

.related-links-item:hover {
  color: var(--color-accent-deep);
}

/* ============================================================
   5. Pages —— 糖心入门（tx/start.html）
   ============================================================ */

/* 概念区块 */
.concept-block {
  max-width: var(--content-w);
  margin-bottom: 56px;
}

.concept-block h2 {
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-line);
}

.concept-copy p {
  margin-bottom: 16px;
  color: var(--color-text);
}

.concept-copy p:last-child {
  margin-bottom: 0;
}

.concept-block .content-figure {
  margin-top: 32px;
}

.content-figure img {
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
}

.content-figure figcaption {
  font-size: 13px;
  color: var(--color-muted);
  margin-top: 10px;
}

/* 术语就地解释卡 */
.term-inline-card {
  max-width: var(--content-w);
  background: var(--color-block);
  border-radius: var(--radius);
  padding: 32px;
  margin-bottom: 56px;
  border-left: 3px solid var(--color-accent);
}

.term-inline-card h2 {
  font-size: 20px;
  margin-bottom: 20px;
}

.term-inline-card .term-item {
  background: var(--color-card);
  border-left: none;
  border-bottom: 1px solid var(--color-line);
  border-radius: 0;
  padding: 16px 0;
  margin-bottom: 0;
}

.term-inline-card .term-item:first-of-type {
  border-top: 1px solid var(--color-line);
}

.term-inline-card .term-item:last-child {
  border-bottom: none;
}

.term-list {
  list-style: none;
}

.term-list .term-item {
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: 16px;
  align-items: baseline;
}

.term-item dt {
  font-weight: 600;
  color: var(--color-ink);
  font-size: 15px;
  font-family: var(--font-mono);
  font-size: 14px;
}

.term-item dd {
  font-size: 14px;
  color: var(--color-text);
  line-height: 1.7;
}

/* 阅读路径图 */
.reading-path-block {
  max-width: var(--content-w);
  margin-bottom: 56px;
}

.reading-path-block h2 {
  margin-bottom: 8px;
}

.reading-path-intro {
  color: var(--color-muted);
  font-size: 15px;
  margin-bottom: 24px;
}

.path-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.reading-path-block .path-card {
  background: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 24px;
}

.reading-path-block .path-card h3 {
  margin-bottom: 6px;
}

.reading-path-block .path-card p {
  font-size: 14px;
  color: var(--color-muted);
  margin-bottom: 12px;
}

.reading-path-block .path-card a {
  font-size: 14px;
  font-weight: 500;
}

/* 常见问题小连接带 */
.quick-links-band {
  max-width: var(--content-w);
  background: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 28px 32px;
  text-align: center;
}

.quick-links-band h2 {
  font-size: 20px;
  margin-bottom: 8px;
}

.quick-links-band p {
  font-size: 14px;
  color: var(--color-muted);
  margin-bottom: 16px;
}

.quick-links-band a {
  display: inline-block;
  padding: 10px 24px;
  border: 1px solid var(--color-accent);
  border-radius: var(--radius);
  color: var(--color-accent-deep);
  font-size: 14px;
  font-weight: 500;
  transition: background var(--transition);
}

.quick-links-band a:hover {
  background: var(--color-block);
}

/* ============================================================
   6. Pages —— 频道名录（tx/channel.html）
   ============================================================ */

/* 侧栏左布局 */
.page-layout.sidebar-left {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 48px;
  align-items: start;
}

.sidebar-card {
  background: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 20px;
  position: sticky;
  top: calc(var(--header-h) + 24px);
}

.sidebar-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-line);
}

.sidebar-list {
  list-style: none;
  display: grid;
  gap: 0;
}

.sidebar-list li {
  border-bottom: 1px solid var(--color-line);
}

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

.sidebar-list a {
  display: block;
  padding: 10px 4px;
  font-size: 14px;
  color: var(--color-text);
  line-height: 1.5;
  transition: color var(--transition), padding-left var(--transition);
}

.sidebar-list a:hover {
  color: var(--color-accent);
  padding-left: 8px;
}

/* 主内容区 */
.main-content {
  min-width: 0;
}

.main-content .breadcrumb {
  margin-bottom: 20px;
}

.main-content .page-header {
  margin-bottom: 40px;
}

.content-section {
  margin-bottom: 56px;
}

.content-section h2 {
  margin-bottom: 12px;
}

.section-lead {
  color: var(--color-muted);
  font-size: 15px;
  margin-bottom: 20px;
  line-height: 1.7;
}

.content-section p {
  margin-bottom: 16px;
  max-width: 640px;
}

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

.media-figure {
  margin: 28px 0;
}

.media-figure img {
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
}

.media-figure figcaption {
  font-size: 13px;
  color: var(--color-muted);
  margin-top: 10px;
}

/* 字段卡片 */
.field-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin: 24px 0;
}

.field-card {
  background: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 20px;
}

.field-card h3 {
  font-size: 16px;
  margin-bottom: 8px;
  color: var(--color-accent-deep);
}

.field-card p {
  font-size: 14px;
  color: var(--color-text);
  margin-bottom: 8px;
  line-height: 1.7;
}

.field-card p:last-child {
  margin-bottom: 0;
}

.field-example {
  font-size: 13px;
  color: var(--color-muted);
  background: var(--color-block);
  border-radius: var(--radius-sm);
  padding: 8px 10px;
}

/* 速查表 */
.content-section .table-wrap {
  margin: 24px 0;
}

/* 练习区 */
.practice-list {
  display: grid;
  gap: 16px;
  margin: 24px 0;
}

.practice-item {
  background: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 24px;
}

.practice-num {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-accent);
  font-weight: 600;
  margin-bottom: 8px;
}

.practice-desc {
  font-size: 15px;
  margin-bottom: 12px;
}

.practice-answer {
  border: none;
  background: var(--color-block);
  border-radius: var(--radius-sm);
  margin-top: 8px;
}

.practice-answer summary {
  padding: 12px 16px;
  font-size: 14px;
  color: var(--color-accent-deep);
}

.practice-answer summary::after {
  font-size: 16px;
}

.practice-answer[open] summary {
  border-bottom: 1px solid var(--color-line);
}

.practice-answer p {
  padding: 12px 16px;
  font-size: 14px;
  color: var(--color-text);
  margin: 0;
}

.section-summary {
  background: var(--color-block);
  border-radius: var(--radius);
  padding: 20px 24px;
  font-size: 15px;
  color: var(--color-text);
  margin-top: 32px;
}

.section-summary a {
  font-weight: 500;
}

/* ============================================================
   7. Pages —— 观看前核对（tx/checklist.html）
   ============================================================ */

.checklist-section {
  margin-bottom: 40px;
}

.checklist-section h2 {
  margin-bottom: 24px;
}

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

.check-item {
  background: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.check-item-head {
  display: flex;
  align-items: center;
  gap: 12px;
}

.check-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--color-accent);
  color: #fff;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  flex-shrink: 0;
}

.check-item h3 {
  font-size: 16px;
  margin: 0;
}

.check-item p {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.7;
}

/* 清单配图 */
.checklist-figure {
  margin: 40px 0;
}

.checklist-figure img {
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
}

.checklist-figure figcaption {
  font-size: 13px;
  color: var(--color-muted);
  margin-top: 10px;
}

/* 歧义处置 */
.ambiguity-section {
  margin-bottom: 56px;
}

.ambiguity-section h2 {
  margin-bottom: 8px;
}

.section-intro {
  color: var(--color-muted);
  font-size: 15px;
  margin-bottom: 24px;
  max-width: 640px;
}

.checklist-section .path-steps,
.ambiguity-section .path-steps {
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.checklist-section .path-step,
.ambiguity-section .path-step {
  background: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 20px;
}

.step-label {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-accent);
  font-weight: 600;
  margin-bottom: 10px;
  background: var(--color-block);
  padding: 2px 8px;
  border-radius: var(--radius-sm);
}

.ambiguity-section .path-step h3 {
  font-size: 15px;
  margin-bottom: 6px;
}

.ambiguity-section .path-step p {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.7;
  margin-bottom: 0;
}

.ambiguity-section .path-step a {
  font-size: 14px;
  font-weight: 500;
}

/* 后续反馈门户行 */
.feedback-gate {
  background: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 32px;
}

.feedback-gate-inner {
  max-width: 640px;
  text-align: center;
  margin: 0 auto;
}

.feedback-gate h2 {
  font-size: 20px;
  margin-bottom: 8px;
}

.feedback-gate p {
  font-size: 14px;
  color: var(--color-muted);
  margin-bottom: 20px;
}

.gate-link {
  display: inline-block;
  padding: 12px 28px;
  background: var(--color-accent);
  color: #fff;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 500;
  transition: background var(--transition);
}

.gate-link:hover {
  background: var(--color-accent-deep);
  color: #fff;
}

.gate-link span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

/* ============================================================
   8. Pages —— 常见误区（tx/myths.html）
   ============================================================ */

.layout-shell {
  display: flex;
  flex-direction: column;
  gap: 56px;
}

/* 误区高频卡 */
.myth-cards-section h2,
.correction-section h2,
.faq-section h2 {
  margin-bottom: 24px;
}

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

.myth-card {
  background: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 24px;
  position: relative;
}

.myth-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--color-block);
  color: var(--color-accent-deep);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 14px;
}

.myth-card-title {
  font-size: 16px;
  margin-bottom: 8px;
  color: var(--color-ink);
}

.myth-card-text {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.7;
}

/* 定向解释区 */
.correction-list {
  display: grid;
  gap: 16px;
}

.correction-item {
  background: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 24px 28px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
}

.correction-item-title {
  font-size: 16px;
  color: var(--color-accent-deep);
}

.correction-body p {
  font-size: 14px;
  color: var(--color-text);
  line-height: 1.75;
  margin-bottom: 8px;
}

.correction-body p:last-child {
  margin-bottom: 0;
}

/* 误区页配图 */
.myths-page .content-figure {
  margin: 8px 0;
}

.content-figure img {
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
}

/* FAQ 折叠区 */
.faq-group {
  display: grid;
  gap: 12px;
}

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

.faq-answer {
  padding: 0 20px 20px;
}

.faq-answer p {
  font-size: 14px;
  color: var(--color-text);
  line-height: 1.75;
  margin-bottom: 8px;
}

.faq-answer p:last-child {
  margin-bottom: 0;
}

/* 行动入口 */
.action-entry {
  background: var(--color-block);
  border-radius: var(--radius);
  padding: 32px;
}

.action-entry-content {
  max-width: 640px;
  text-align: center;
  margin: 0 auto;
}

.action-entry-title {
  font-size: 20px;
  margin-bottom: 8px;
}

.action-entry-content p {
  font-size: 14px;
  color: var(--color-muted);
  margin-bottom: 16px;
}

.action-entry-content p a {
  font-weight: 500;
}

.action-link {
  display: inline-block;
  padding: 12px 28px;
  background: var(--color-accent);
  color: #fff;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 500;
  transition: background var(--transition);
}

.action-link:hover {
  background: var(--color-accent-deep);
  color: #fff;
}

/* ============================================================
   9. Pages —— 收录说明（tx/collect.html）
   ============================================================ */

.collect-layout {
  display: flex;
  flex-direction: column;
  gap: 48px;
}

.collect-section h2 {
  margin-bottom: 12px;
}

.collect-section > p {
  color: var(--color-muted);
  font-size: 15px;
  margin-bottom: 24px;
  max-width: 680px;
}

/* 字段数据表 */
.field-data-table th,
.field-data-table td {
  min-width: 140px;
}

/* 时间范围说明卡 */
.time-range-card {
  background: var(--color-card);
  border: 1px solid var(--color-line);
  border-left: 3px solid var(--color-accent);
  border-radius: var(--radius);
  padding: 20px 24px;
  margin-bottom: 32px;
  max-width: 680px;
}

.time-range-card h3 {
  font-size: 15px;
  margin-bottom: 8px;
}

.time-range-card p {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.7;
  margin: 0;
}

/* 更新方式 */
.update-steps {
  background: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 24px;
  max-width: 680px;
}

.update-steps h3 {
  font-size: 16px;
  margin-bottom: 16px;
}

.update-step-list {
  list-style: none;
  display: grid;
  gap: 0;
}

.update-step-list li {
  display: flex;
  gap: 16px;
  padding: 14px 0;
  border-bottom: 1px solid var(--color-line);
}

.update-step-list li:last-child {
  border-bottom: none;
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--color-block);
  color: var(--color-accent-deep);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  flex-shrink: 0;
}

.step-content {
  font-size: 14px;
  color: var(--color-text);
  line-height: 1.7;
}

/* 配图 */
.collect-figure {
  margin: 8px 0;
}

.collect-figure img {
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
}

.collect-figure figcaption {
  font-size: 13px;
  color: var(--color-muted);
  margin-top: 10px;
}

/* 使用限制 */
.limit-list {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 32px;
}

.limit-list li {
  background: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 20px;
}

.limit-list h3 {
  font-size: 15px;
  margin-bottom: 6px;
}

.limit-list p {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.7;
  margin: 0;
}

/* 常见疑问 */
.collect-faq {
  background: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 24px;
}

.collect-faq h3 {
  font-size: 16px;
  margin-bottom: 16px;
}

.collect-details {
  border: none;
  border-bottom: 1px solid var(--color-line);
  border-radius: 0;
  background: transparent;
}

.collect-details:last-child {
  border-bottom: none;
}

.collect-details summary {
  padding: 14px 0;
  font-size: 15px;
}

.collect-details p {
  font-size: 14px;
  color: var(--color-muted);
  padding: 0 0 14px;
  line-height: 1.7;
}

/* 相关页面延伸 */
.related-links .visually-hidden {
  position: absolute;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-top: 32px;
}

.related-card {
  background: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.related-card:hover {
  border-color: var(--color-accent-soft);
  box-shadow: var(--shadow-card);
  color: var(--color-text);
}

.related-card-label {
  font-size: 13px;
  color: var(--color-accent);
  font-family: var(--font-mono);
}

.related-card-text {
  font-size: 14px;
  color: var(--color-text);
  font-weight: 500;
  line-height: 1.5;
}

/* ============================================================
   10. Pages —— 问题与反馈（tx/feedback.html）
   ============================================================ */

.feedback-scope,
.feedback-exclude,
.feedback-path,
.review-links {
  margin-bottom: 56px;
}

.content-section h2 {
  margin-bottom: 12px;
}

.content-section > p {
  color: var(--color-muted);
  font-size: 15px;
  margin-bottom: 24px;
  max-width: 640px;
}

/* 可反馈范围 */
.scope-list {
  list-style: none;
  counter-reset: scope-counter;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.scope-list li {
  background: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 24px;
  counter-increment: scope-counter;
  position: relative;
}

.scope-list li::before {
  content: '0' counter(scope-counter);
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-accent);
  font-weight: 600;
  display: block;
  margin-bottom: 10px;
}

.scope-list h3 {
  font-size: 16px;
  margin-bottom: 6px;
}

.scope-list p {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.7;
  margin: 0;
}

/* 不可处理事项 */
.exclude-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background: var(--color-card);
}

.exclude-table th,
.exclude-table td {
  min-width: 160px;
}

/* 反馈路径 */
.path-figure {
  margin: 24px 0;
}

.path-figure img {
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
}

.path-figure figcaption {
  font-size: 13px;
  color: var(--color-muted);
  margin-top: 10px;
}

.feedback-path .path-steps {
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 24px;
}

.feedback-path .path-steps li {
  background: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 20px;
  list-style: none;
  counter-increment: feedback-step;
}

.feedback-path .path-steps {
  counter-reset: feedback-step;
}

.feedback-path .path-steps li::before {
  content: '0' counter(feedback-step);
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-accent);
  font-weight: 600;
  display: block;
  margin-bottom: 10px;
}

.feedback-path .path-steps h3 {
  font-size: 15px;
  margin-bottom: 6px;
}

.feedback-path .path-steps p {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.7;
  margin: 0;
}

.feedback-path .path-steps a {
  font-size: 14px;
  font-weight: 500;
}

/* 复核入口卡片 */
.review-card-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.review-card {
  background: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 20px;
  display: flex;
  flex-direction: column;
}

.review-card h3 {
  font-size: 15px;
  margin-bottom: 6px;
}

.review-card p {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.7;
  margin-bottom: 12px;
  flex-grow: 1;
}

.review-card a {
  font-size: 14px;
  font-weight: 500;
}

/* ============================================================
   11. Pages —— 404 页面
   ============================================================ */

.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 70vh;
  padding: 48px var(--gutter);
}

.error-wrap {
  max-width: 560px;
  text-align: center;
  background: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 48px 40px;
  box-shadow: var(--shadow-card);
}

.error-code {
  font-family: var(--font-mono);
  font-size: 72px;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1;
  margin-bottom: 16px;
}

.error-wrap h1 {
  font-size: 24px;
  color: var(--color-ink);
  margin-bottom: 12px;
}

.error-desc {
  font-size: 15px;
  color: var(--color-muted);
  margin-bottom: 24px;
  line-height: 1.7;
}

.btn-home {
  display: inline-block;
  padding: 12px 28px;
  background: var(--color-accent);
  color: #fff;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 500;
  margin-bottom: 28px;
  transition: background var(--transition);
}

.btn-home:hover {
  background: var(--color-accent-deep);
  color: #fff;
}

.error-links {
  border-top: 1px solid var(--color-line);
  padding-top: 20px;
}

.error-help-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-ink);
  margin-bottom: 8px;
}

.error-links ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 20px;
}

.error-links a {
  font-size: 14px;
  color: var(--color-muted);
}

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

/* ============================================================
   12. Components —— 页脚
   ============================================================ */

.site-footer {
  background: var(--color-card);
  border-top: 1px solid var(--color-line);
  margin-top: 0;
}

.footer-grid {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 56px var(--gutter) 32px;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 40px;
}

.footer-brand-name {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-ink);
  margin-bottom: 10px;
}

.footer-brand-desc {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.7;
  max-width: 280px;
}

.footer-col h2 {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-ink);
  margin-bottom: 16px;
}

.footer-col ul {
  list-style: none;
  display: grid;
  gap: 8px;
}

.footer-col a {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.6;
  transition: color var(--transition);
}

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

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

.footer-bottom p {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 20px var(--gutter);
  font-size: 13px;
  color: var(--color-muted);
  line-height: 1.6;
  text-align: left;
}

#current-year {
  font-family: var(--font-mono);
}

/* ============================================================
   13. Responsive —— 响应式断点
   ============================================================ */

/* 1024px 以下：单列 */
@media (max-width: 1024px) {
  .direction-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

  .concept-explainer {
    grid-template-columns: 1fr;
    gap: 32px;
  }

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

  .page-layout.sidebar-left {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .sidebar-card {
    position: static;
  }

  .sidebar-list {
    grid-template-columns: repeat(5, auto);
    gap: 0 20px;
    overflow-x: auto;
    padding-bottom: 4px;
  }

  .sidebar-list li {
    border-bottom: none;
    white-space: nowrap;
  }

  .sidebar-list a {
    padding: 6px 0;
  }

  .sidebar-label {
    margin-bottom: 8px;
  }

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

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

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}

/* 768px 以下：移动端 */
@media (max-width: 768px) {
  :root {
    --gutter: 16px;
    --header-h: 56px;
  }

  .site-main.inner-main {
    padding: 24px 0 56px;
    max-width: 100%;
  }

  .inner-main > .breadcrumb,
  .inner-main > .page-header,
  .inner-main > section,
  .inner-main > .layout-shell,
  .inner-main > .collect-layout,
  .inner-main > .content-section,
  .inner-main > div {
    margin-left: var(--gutter);
    margin-right: var(--gutter);
  }

  .breadcrumb {
    margin-bottom: 16px;
    font-size: 13px;
  }

  .page-header {
    margin-bottom: 32px;
  }

  .page-title {
    font-size: 28px;
    line-height: 1.3;
  }

  .page-description {
    font-size: 15px;
    line-height: 1.75;
  }

  /* 首页 */
  .hero-task {
    grid-template-columns: 1fr;
    gap: 32px;
    padding: 40px var(--gutter) 32px;
  }

  .home-title {
    font-size: 30px;
    line-height: 1.3;
  }

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

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

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

  .hero-note {
    font-size: 13px;
  }

  .hero-media {
    order: 2;
  }

  .channel-direction {
    padding: 40px 0;
  }

  .section-heading {
    margin-bottom: 24px;
  }

  .direction-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .direction-card {
    padding: 20px;
  }

  .reading-path {
    padding: 40px 0;
  }

  .path-steps {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .path-step {
    padding: 20px;
  }

  .concept-explainer {
    padding: 40px var(--gutter);
    gap: 24px;
  }

  .term-item {
    padding: 16px;
  }

  .explainer-right {
    gap: 16px;
  }

  .boundary-entry {
    padding: 40px 0;
  }

  .entry-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .entry-card {
    padding: 20px;
  }

  .related-links {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
    padding: 24px var(--gutter) 40px;
  }

  /* 糖心入门 */
  .concept-block {
    margin-bottom: 32px;
  }

  .concept-block h2 {
    font-size: 20px;
  }

  .term-inline-card {
    padding: 20px;
    margin-bottom: 32px;
  }

  .term-list .term-item {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .reading-path-block {
    margin-bottom: 32px;
  }

  .path-cards {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .quick-links-band {
    padding: 20px;
  }

  /* 频道名录 */
  .content-section {
    margin-bottom: 32px;
  }

  .content-section h2 {
    font-size: 20px;
  }

  .field-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .sidebar-card {
    margin: 0 var(--gutter) 24px;
  }

  .sidebar-list {
    grid-template-columns: repeat(5, auto);
    gap: 0 16px;
  }

  .practice-item {
    padding: 16px;
  }

  .section-summary {
    padding: 16px;
  }

  /* 观看前核对 */
  .checklist-section h2 {
    font-size: 20px;
  }

  .checklist-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .check-item {
    padding: 20px;
  }

  .ambiguity-section .path-steps,
  .feedback-path .path-steps {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .feedback-gate {
    padding: 20px;
  }

  /* 常见误区 */
  .layout-shell {
    gap: 32px;
  }

  .myth-cards-row {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .myth-card {
    padding: 20px;
  }

  .correction-item {
    padding: 20px;
  }

  .action-entry {
    padding: 20px;
  }

  /* 收录说明 */
  .collect-layout {
    gap: 32px;
  }

  .limit-list {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .related-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .related-card {
    padding: 16px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 40px var(--gutter) 24px;
  }

  .footer-brand-desc {
    max-width: 100%;
  }

  .footer-bottom p {
    font-size: 12px;
  }

  /* 导航 */
  .nav-toggle {
    padding: 6px 12px;
    font-size: 14px;
  }

  .nav-overlay-header {
    height: var(--header-h);
  }

  .nav-links {
    margin-top: 24px;
    gap: 0;
  }

  .nav-links a {
    font-size: 17px;
    padding: 12px 2px;
  }

  .nav-overview {
    margin: 16px auto 40px;
    font-size: 13px;
  }

  /* 404 */
  .error-wrap {
    padding: 32px 20px;
    width: 100%;
  }

  .error-code {
    font-size: 56px;
  }

  /* 反馈页 */
  .scope-list {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .scope-list li {
    padding: 20px;
  }

  .review-card-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .review-card {
    padding: 16px;
  }

  .table-wrap {
    margin-left: calc(-1 * var(--gutter));
    margin-right: calc(-1 * var(--gutter));
    border-left: none;
    border-right: none;
    border-radius: 0;
  }

  .data-table,
  .field-data-table,
  .exclude-table {
    min-width: 520px;
  }

  .data-table th,
  .data-table td,
  .field-data-table th,
  .field-data-table td,
  .exclude-table th,
  .exclude-table td {
    padding: 12px 14px;
    font-size: 14px;
  }
}

/* 480px 以下微调 */
@media (max-width: 480px) {
  .home-title {
    font-size: 26px;
  }

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

  .hero-actions {
    flex-direction: column;
  }

  .brand-text {
    font-size: 17px;
  }

  .nav-toggle {
    font-size: 13px;
    padding: 6px 10px;
  }

  .btn {
    padding: 12px 20px;
    font-size: 14px;
  }

  .section-heading h2 {
    font-size: 20px;
  }

  .direction-card h3,
  .entry-card h3 {
    font-size: 16px;
  }

  .check-item-head {
    gap: 8px;
  }

  .check-num {
    width: 24px;
    height: 24px;
    font-size: 12px;
  }

  .path-step h3 {
    font-size: 16px;
  }

  .step-num {
    width: 28px;
    height: 28px;
    font-size: 13px;
  }

  .term-item h3 {
    font-size: 15px;
  }

  .concept-block h2 {
    font-size: 19px;
  }

  .footer-brand-name {
    font-size: 16px;
  }

  .error-code {
    font-size: 48px;
  }
}