/* ============================================================
   zz-tools.com — 星美传媒官网
   全站样式表
   ============================================================ */

/* ============================================================
   1. BASE — 基础变量、重置、字体、通用元素
   ============================================================ */

:root {
  --paper: #F7F4EF;
  --white: #FFFFFF;
  --ink: #22201D;
  --muted: #6E675F;
  --line: #E3DCD2;
  --accent: #B4482A;
  --container: 1200px;
  --container-narrow: 760px;
  --radius: 8px;
  --radius-sm: 6px;
  --shadow-card: 0 1px 3px rgba(34, 32, 29, 0.06);
  --shadow-card-hover: 0 8px 24px rgba(34, 32, 29, 0.1);
  --space-section: 88px;
  --space-section-mobile: 64px;
  --font-stack: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
}

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

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

body.site-body {
  font-family: var(--font-stack);
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink);
  background-color: var(--paper);
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

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

a:hover {
  color: #8F3A1F;
}

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

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

h1 {
  font-size: 36px;
  line-height: 1.3;
}

h2 {
  font-size: 24px;
  line-height: 1.4;
  margin-bottom: 16px;
}

h3 {
  font-size: 17px;
  line-height: 1.5;
  margin-bottom: 8px;
}

p {
  margin-bottom: 12px;
}

.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;
}

/* ============================================================
   2. LAYOUT — 全局布局骨架
   ============================================================ */

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

.header-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
}

.brand-name {
  font-size: 22px;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: 0.02em;
  transition: color 0.2s ease;
}

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

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

.nav-toggle {
  display: none;
  background: none;
  border: 0;
  cursor: pointer;
  padding: 10px 4px;
  min-width: 44px;
  min-height: 44px;
  align-items: center;
  justify-content: center;
}

.nav-toggle-icon {
  display: block;
  position: relative;
  width: 22px;
  height: 2px;
  background-color: var(--ink);
  transition: background-color 0.2s ease;
}

.nav-toggle-icon::before,
.nav-toggle-icon::after {
  content: "";
  position: absolute;
  left: 0;
  width: 22px;
  height: 2px;
  background-color: var(--ink);
  transition: transform 0.2s ease;
}

.nav-toggle-icon::before {
  top: -7px;
}

.nav-toggle-icon::after {
  top: 7px;
}

.nav-list {
  display: flex;
  list-style: none;
  gap: 4px;
  align-items: center;
}

.nav-list li {
  margin: 0;
}

.nav-list a {
  display: block;
  padding: 10px 16px;
  font-size: 15px;
  font-weight: 500;
  color: var(--ink);
  border-radius: var(--radius-sm);
  transition: background-color 0.2s ease, color 0.2s ease;
  white-space: nowrap;
}

.nav-list a:hover {
  background-color: var(--paper);
  color: var(--accent);
}

.nav-list a.is-current {
  color: var(--accent);
  background-color: rgba(180, 72, 42, 0.08);
}

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

.inner-main {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px 96px;
}

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

.footer-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 48px 24px 32px;
}

.footer-brand {
  font-size: 17px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 4px;
  line-height: 1.6;
}

.footer-nav {
  margin: 16px 0 24px;
}

.footer-nav ul {
  display: flex;
  flex-wrap: wrap;
  list-style: none;
  gap: 8px 24px;
}

.footer-nav a {
  font-size: 14px;
  color: var(--muted);
  padding: 4px 0;
  display: inline-block;
}

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

.footer-copy {
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 0;
  border-top: 1px solid var(--line);
  padding-top: 24px;
}

/* ============================================================
   3. COMPONENTS — 通用组件
   ============================================================ */

/* 面包屑 */
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  padding: 24px 0 8px;
  font-size: 14px;
}

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

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

.breadcrumb-sep {
  color: var(--line);
  font-size: 13px;
}

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

/* 页面标题区 */
.page-header {
  padding: 24px 0 40px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 48px;
}

.page-title {
  font-size: 36px;
  line-height: 1.3;
  margin-bottom: 12px;
}

.page-description {
  font-size: 17px;
  color: var(--muted);
  max-width: 680px;
  margin-bottom: 0;
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 28px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.5;
  cursor: pointer;
  border: 1px solid transparent;
  transition: background-color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

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

.btn-primary:hover {
  background-color: #8F3A1F;
  color: var(--white);
  transform: translateY(-1px);
}

.btn-secondary {
  background-color: transparent;
  color: var(--ink);
  border-color: var(--line);
}

.btn-secondary:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-1px);
}

/* 区块标题与导语 */
.section-intro {
  font-size: 16px;
  color: var(--muted);
  max-width: 640px;
  margin-bottom: 32px;
}

/* 相关链接（首页底部、内页底部） */
.related-links {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px 24px;
  margin-top: 64px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}

.related-links-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--muted);
  margin-right: 4px;
}

.related-links-item {
  font-size: 14px;
  color: var(--accent);
  padding: 6px 0;
}

.related-links-item:hover {
  color: #8F3A1F;
}

/* 相关卡片（跨页面复用） */
.related-card {
  display: block;
  background-color: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px 24px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.related-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-2px);
}

.related-card h3 {
  margin-bottom: 4px;
  font-size: 16px;
}

.related-card p {
  margin-bottom: 0;
  font-size: 14px;
  color: var(--muted);
}

/* ============================================================
   4. PAGES — 首页
   ============================================================ */

.home-main {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

/* —— 杂志目录首屏 —— */
.hero-magazine {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
  padding: 72px 0 88px;
}

.hero-content {
  max-width: 560px;
}

.eyebrow {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 20px;
  padding: 4px 12px;
  border: 1px solid rgba(180, 72, 42, 0.3);
  border-radius: 999px;
  background-color: rgba(180, 72, 42, 0.04);
}

.hero-magazine h1 {
  font-size: 40px;
  line-height: 1.25;
  margin-bottom: 20px;
  letter-spacing: 0.01em;
}

.hero-lead {
  font-size: 18px;
  line-height: 1.8;
  color: var(--muted);
  margin-bottom: 32px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.hero-figure {
  margin: 0;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-card-hover);
}

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

/* —— 本期目录 —— */
.toc-directory {
  padding: 88px 0;
  border-top: 1px solid var(--line);
}

.toc-directory h2 {
  font-size: 28px;
}

.toc-directory > .section-intro {
  margin-bottom: 40px;
}

.toc-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.toc-item {
  background-color: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 32px 28px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.toc-item:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-2px);
}

.toc-number {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 16px;
  letter-spacing: 0.08em;
}

.toc-item h3 {
  font-size: 18px;
  margin-bottom: 8px;
}

.toc-item p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
  margin-bottom: 16px;
}

.toc-item a {
  font-size: 14px;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.toc-item a::after {
  content: "→";
  transition: transform 0.2s ease;
}

.toc-item a:hover::after {
  transform: translateX(4px);
}

/* —— 频道分类速览 —— */
.channel-preview {
  padding: 88px 0;
  border-top: 1px solid var(--line);
}

.channel-preview h2 {
  font-size: 28px;
}

.channel-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

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

.channel-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-2px);
}

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

.channel-card h3 {
  padding: 16px 20px 0;
  font-size: 17px;
}

.channel-card > p {
  padding: 0 20px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
  margin-bottom: 12px;
}

.channel-card > a {
  display: inline-block;
  margin: 0 20px 20px;
  font-size: 14px;
  font-weight: 600;
}

/* —— 精选专题片单 —— */
.special-teasers {
  padding: 88px 0;
  border-top: 1px solid var(--line);
}

.special-teasers h2 {
  font-size: 28px;
}

.special-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.special-card {
  background-color: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.special-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-2px);
}

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

.special-info {
  padding: 20px;
}

.special-info h3 {
  font-size: 17px;
  margin-bottom: 8px;
}

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

.special-info a {
  font-size: 14px;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.special-info a::after {
  content: "→";
  transition: transform 0.2s ease;
}

.special-info a:hover::after {
  transform: translateX(4px);
}

/* —— 观看指南入口 —— */
.guide-entry {
  padding: 88px 0;
  border-top: 1px solid var(--line);
}

.guide-entry h2 {
  font-size: 28px;
}

.guide-entry > p {
  font-size: 16px;
  color: var(--muted);
  max-width: 640px;
  margin-bottom: 32px;
}

.guide-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

/* ============================================================
   5. PAGES — 内页通用布局
   ============================================================ */

/* 主内容 + 右侧辅助栏 */
.layout-with-aside {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 48px;
  align-items: start;
}

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

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

.aside-block {
  background-color: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 24px;
  margin-bottom: 24px;
}

.aside-block h2 {
  font-size: 17px;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

/* ============================================================
   6. PAGES — 频道分类页
   ============================================================ */

.channel-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

.channel-list > h2 {
  font-size: 22px;
  margin-bottom: 0;
}

.channel-item {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 24px;
  background-color: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

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

.channel-media {
  overflow: hidden;
  border-radius: var(--radius-sm);
}

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

.channel-content {
  min-width: 0;
}

.channel-content h3 {
  font-size: 19px;
  margin-bottom: 8px;
}

.channel-position {
  font-size: 14px;
  color: var(--muted);
  margin-bottom: 12px;
}

.channel-topics {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 12px;
  padding: 0;
}

.channel-topics li {
  font-size: 13px;
  background-color: var(--paper);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 2px 12px;
  color: var(--ink);
}

.channel-scene {
  font-size: 14px;
  color: var(--muted);
  margin-bottom: 12px;
}

.channel-scene::before {
  content: "适合场景：";
  font-weight: 600;
  color: var(--ink);
}

.channel-link {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 0;
}

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

.channel-link a::after {
  content: "→";
  transition: transform 0.2s ease;
}

.channel-link a:hover::after {
  transform: translateX(4px);
}

/* 频道选择建议 */
.choice-steps {
  list-style: none;
  counter-reset: choice;
  padding: 0;
  margin: 0;
}

.choice-steps li {
  counter-increment: choice;
  position: relative;
  padding: 0 0 20px 40px;
}

.choice-steps li:last-child {
  padding-bottom: 0;
}

.choice-steps li::before {
  content: counter(choice);
  position: absolute;
  left: 0;
  top: 2px;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background-color: rgba(180, 72, 42, 0.1);
  color: var(--accent);
  font-size: 13px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

.choice-steps h3 {
  font-size: 15px;
  margin-bottom: 4px;
}

.choice-steps p {
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
  margin-bottom: 0;
}

/* ============================================================
   7. PAGES — 专题片单页
   ============================================================ */

.sidebar-right {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 48px;
  align-items: start;
}

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

.sidebar-area {
  min-width: 0;
}

.special-list-block {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
}

.special-list-block > h2 {
  font-size: 22px;
  margin-bottom: 0;
}

.special-item {
  background-color: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

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

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

.special-body {
  padding: 24px 28px 28px;
}

.special-body h3 {
  font-size: 20px;
  margin-bottom: 8px;
}

.special-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--accent);
  background-color: rgba(180, 72, 42, 0.06);
  border: 1px solid rgba(180, 72, 42, 0.2);
  padding: 2px 12px;
  border-radius: 999px;
  margin-bottom: 12px;
}

.special-desc {
  font-size: 15px;
  color: var(--muted);
  margin-bottom: 16px;
}

.special-scope {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
  padding: 0;
  margin-bottom: 16px;
}

.special-scope li {
  font-size: 14px;
  color: var(--ink);
  padding-left: 20px;
  position: relative;
}

.special-scope li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--accent);
  opacity: 0.7;
}

.special-more {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 0;
}

.special-more a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.special-more a::after {
  content: "→";
  transition: transform 0.2s ease;
}

.special-more a:hover::after {
  transform: translateX(4px);
}

.special-note-block {
  background-color: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 32px 28px;
  margin-top: 16px;
}

.special-note-block h2 {
  font-size: 18px;
  margin-bottom: 12px;
}

.special-note-block p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
  margin-bottom: 8px;
}

.special-note-block p:last-child {
  margin-bottom: 0;
}

/* 侧栏组件 */
.widget {
  background-color: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 24px;
  margin-bottom: 24px;
}

.widget h2 {
  font-size: 17px;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

.tag-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 0;
  margin: 0;
}

.tag-list li {
  font-size: 13px;
  background-color: var(--paper);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 4px 14px;
  color: var(--ink);
}

.widget-note p {
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
  margin-bottom: 8px;
}

.widget-note p:last-child {
  margin-bottom: 0;
}

/* ============================================================
   8. PAGES — 观看指南页
   ============================================================ */

.sidebar-left {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 48px;
  align-items: start;
}

.guide-tree {
  background-color: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 24px;
  position: sticky;
  top: 96px;
}

.tree-heading {
  margin-bottom: 20px;
}

.tree-title {
  font-size: 17px;
  margin-bottom: 0;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

.tree-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.tree-item {
  margin-bottom: 8px;
}

.tree-label {
  display: block;
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
  padding: 6px 0;
}

.tree-sublist {
  list-style: none;
  padding: 0 0 8px 16px;
  margin: 0;
}

.tree-sublist li {
  margin-bottom: 2px;
}

.tree-sublist a {
  display: block;
  font-size: 14px;
  color: var(--muted);
  padding: 4px 0;
  border-left: 2px solid var(--line);
  padding-left: 12px;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.tree-sublist a:hover {
  color: var(--accent);
  border-left-color: var(--accent);
}

.guide-content {
  min-width: 0;
}

.guide-steps {
  margin-bottom: 64px;
}

.guide-steps h2 {
  font-size: 22px;
}

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

.step-item {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 24px;
  background-color: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

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

.step-media {
  overflow: hidden;
  border-radius: var(--radius-sm);
}

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

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

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

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

/* 入口核验清单 */
.verification-checklist {
  margin-bottom: 64px;
  background-color: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 32px 28px;
}

.verification-checklist h2 {
  font-size: 22px;
}

.checklist {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin: 24px 0 16px;
}

.check-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  padding: 16px 20px;
  background-color: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
}

.check-number {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background-color: var(--accent);
  color: var(--white);
  font-size: 13px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

.check-text {
  min-width: 0;
}

.check-title {
  font-size: 15px;
  font-weight: 600;
  display: block;
  margin-bottom: 2px;
}

.check-desc {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.6;
}

.checklist-note {
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 0;
  padding-top: 12px;
  border-top: 1px solid var(--line);
}

/* 延伸阅读 */
.related-link {
  margin-bottom: 64px;
}

.related-title {
  font-size: 18px;
  margin-bottom: 20px;
}

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

.related-grid .related-card {
  padding: 24px;
}

.related-card-title {
  display: block;
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 4px;
}

.related-card-desc {
  display: block;
  font-size: 14px;
  color: var(--muted);
  line-height: 1.6;
}

.related-grid .related-card:hover .related-card-title {
  color: var(--accent);
}

/* ============================================================
   9. PAGES — 品牌说明页
   ============================================================ */

.page-about .page-header {
  text-align: left;
}

.page-about .page-description {
  margin-bottom: 0;
}

.positioning-block {
  max-width: var(--container-narrow);
  margin: 0 0 64px;
}

.positioning-block h2 {
  font-size: 22px;
}

.positioning-block .lead {
  font-size: 20px;
  font-weight: 600;
  line-height: 1.7;
  color: var(--ink);
  margin-bottom: 24px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--line);
}

.positioning-block p {
  font-size: 15px;
  color: var(--muted);
  line-height: 1.9;
  margin-bottom: 16px;
}

.positioning-block p:last-child {
  margin-bottom: 0;
}

.principles-list {
  margin-bottom: 64px;
}

.principles-list h2 {
  font-size: 22px;
}

.section-note {
  font-size: 15px;
  color: var(--muted);
  margin-bottom: 32px;
}

.principle-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-bottom: 40px;
}

.principle-item {
  background-color: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

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

.principle-item h3 {
  font-size: 17px;
  margin-bottom: 8px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
}

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

.boundary-note {
  background-color: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 32px 28px;
  max-width: var(--container-narrow);
}

.boundary-note h3 {
  font-size: 18px;
  margin-bottom: 16px;
}

.boundary-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.boundary-list li {
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
  padding: 8px 0 8px 24px;
  position: relative;
  border-bottom: 1px solid var(--line);
}

.boundary-list li:last-child {
  border-bottom: 0;
}

.boundary-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 18px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--accent);
  opacity: 0.7;
}

.principles-media {
  margin: 40px 0 64px;
  border-radius: var(--radius);
  overflow: hidden;
}

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

.principles-media figcaption {
  font-size: 13px;
  color: var(--muted);
  text-align: center;
  padding: 12px 0;
  background-color: var(--white);
  border: 1px solid var(--line);
  border-top: 0;
  border-radius: 0 0 var(--radius) var(--radius);
}

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

.related-card-name {
  display: block;
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 4px;
}

.related-card-desc {
  display: block;
  font-size: 14px;
  color: var(--muted);
  line-height: 1.6;
}

.related-card-group .related-card:hover .related-card-name {
  color: var(--accent);
}

/* ============================================================
   10. PAGES — 帮助与反馈页
   ============================================================ */

.faq-list {
  margin-bottom: 64px;
}

.faq-list .section-title {
  font-size: 22px;
}

.faq-item {
  background-color: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  margin-bottom: 12px;
  overflow: hidden;
  transition: border-color 0.2s ease;
}

.faq-item:hover {
  border-color: var(--accent);
}

.faq-item summary {
  cursor: pointer;
  padding: 20px 24px;
  font-size: 16px;
  font-weight: 600;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  transition: color 0.2s ease;
}

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

.faq-item summary::after {
  content: "+";
  font-size: 22px;
  font-weight: 400;
  color: var(--accent);
  flex-shrink: 0;
  transition: transform 0.2s ease;
}

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

.faq-item[open] summary::after {
  transform: rotate(45deg);
}

.faq-answer {
  padding: 20px 24px;
}

.faq-answer p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
  margin-bottom: 8px;
}

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

.faq-answer a {
  font-size: 14px;
  font-weight: 600;
}

/* 反馈前准备 */
.feedback-steps {
  margin-bottom: 64px;
}

.feedback-steps .section-title {
  font-size: 22px;
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.step-card {
  background-color: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px 20px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

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

.step-number {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.08em;
  margin-bottom: 12px;
}

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

.step-card p {
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
  margin-bottom: 0;
}

.help-media {
  margin-bottom: 64px;
  border-radius: var(--radius);
  overflow: hidden;
}

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

.help-media figcaption {
  font-size: 13px;
  color: var(--muted);
  text-align: center;
  padding: 12px 0;
  background-color: var(--white);
  border: 1px solid var(--line);
  border-top: 0;
  border-radius: 0 0 var(--radius) var(--radius);
}

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

.related-cards .related-card h3 {
  font-size: 16px;
}

/* ============================================================
   11. PAGES — 404 页
   ============================================================ */

.error-main {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 96px 24px;
  text-align: center;
  flex: 1 0 auto;
}

.error-panel {
  max-width: 560px;
  margin-bottom: 48px;
}

.error-code {
  font-size: 72px;
  font-weight: 700;
  color: var(--accent);
  line-height: 1.1;
  margin-bottom: 8px;
  letter-spacing: 0.02em;
}

.error-panel h1 {
  font-size: 28px;
  margin-bottom: 12px;
}

.error-desc {
  font-size: 16px;
  color: var(--muted);
  margin-bottom: 24px;
}

.error-back {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 28px;
  background-color: var(--accent);
  color: var(--white);
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  transition: background-color 0.2s ease, transform 0.2s ease;
}

.error-back:hover {
  background-color: #8F3A1F;
  color: var(--white);
  transform: translateY(-1px);
}

.error-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px 24px;
}

.error-links a {
  font-size: 14px;
  font-weight: 600;
  padding: 8px 0;
}

/* ============================================================
   12. RESPONSIVE — 响应式断点
   ============================================================ */

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

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}

/* 桌面小屏：1200px 以下 */
@media (max-width: 1200px) {
  .hero-magazine {
    gap: 40px;
    padding: 56px 0 72px;
  }

  .hero-magazine h1 {
    font-size: 36px;
  }
}

/* 平板：1024px 以下 */
@media (max-width: 1024px) {
  .toc-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
  }

  .channel-grid {
    gap: 16px;
  }

  .special-list {
    gap: 16px;
  }

  .channel-item {
    grid-template-columns: 200px 1fr;
    gap: 20px;
  }

  .layout-with-aside {
    grid-template-columns: 1fr 280px;
    gap: 32px;
  }

  .sidebar-right {
    grid-template-columns: 1fr 280px;
    gap: 32px;
  }

  .sidebar-left {
    grid-template-columns: 220px 1fr;
    gap: 32px;
  }

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

/* 手机：768px 以下 */
@media (max-width: 768px) {
  .header-inner {
    min-height: 60px;
    padding: 0 16px;
  }

  .brand-name {
    font-size: 19px;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-list {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    background-color: var(--white);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 8px 24px rgba(34, 32, 29, 0.08);
    padding: 8px 16px 16px;
    gap: 0;
    z-index: 99;
  }

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

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

  .nav-list li:last-child {
    border-bottom: 0;
  }

  .nav-list a {
    padding: 14px 8px;
    font-size: 16px;
    border-radius: 0;
  }

  .site-main {
    padding: 0;
  }

  .home-main {
    padding: 0 16px;
  }

  .inner-main {
    padding: 0 16px 64px;
  }

  .hero-magazine {
    grid-template-columns: 1fr;
    gap: 32px;
    padding: 40px 0 56px;
  }

  .hero-content {
    max-width: 100%;
  }

  .hero-magazine h1 {
    font-size: 30px;
  }

  .hero-lead {
    font-size: 16px;
  }

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

  .toc-directory {
    padding: 56px 0;
  }

  .toc-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .toc-item {
    padding: 24px;
  }

  .channel-preview {
    padding: 56px 0;
  }

  .channel-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

  .channel-card h3 {
    padding: 12px 16px 0;
    font-size: 15px;
  }

  .channel-card > p {
    padding: 0 16px;
    font-size: 13px;
  }

  .channel-card > a {
    margin: 0 16px 16px;
    font-size: 13px;
  }

  .special-teasers {
    padding: 56px 0;
  }

  .special-list {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .guide-entry {
    padding: 56px 0;
  }

  .page-header {
    padding: 16px 0 32px;
    margin-bottom: 32px;
  }

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

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

  .layout-with-aside {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .layout-aside {
    order: 2;
  }

  .channel-item {
    grid-template-columns: 1fr;
    gap: 16px;
    padding: 16px;
  }

  .channel-media {
    max-width: 100%;
  }

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

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

  .sidebar-area {
    order: 2;
  }

  .special-scope {
    grid-template-columns: 1fr;
  }

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

  .guide-tree {
    position: static;
    order: 2;
  }

  .guide-content {
    order: 1;
  }

  .step-item {
    grid-template-columns: 120px 1fr;
    gap: 16px;
    padding: 16px;
  }

  .step-media img {
    aspect-ratio: 1 / 1;
  }

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

  .principle-grid {
    grid-template-columns: 1fr;
  }

  .related-card-group {
    grid-template-columns: 1fr;
  }

  .steps-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .related-cards {
    grid-template-columns: 1fr;
  }

  .footer-inner {
    padding: 32px 16px 24px;
  }

  .footer-nav ul {
    gap: 8px 16px;
  }

  .error-main {
    padding: 64px 16px;
  }

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

/* 小屏手机：480px 以下 */
@media (max-width: 480px) {
  .channel-grid {
    grid-template-columns: 1fr;
  }

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

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

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

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

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

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

  .step-media {
    max-width: 100%;
  }

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

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

  .special-body {
    padding: 20px 16px;
  }

  .faq-item summary {
    padding: 16px;
    font-size: 15px;
  }

  .faq-answer {
    padding: 16px;
  }

  .check-item {
    padding: 14px;
    gap: 12px;
  }

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