/* ============================================================
   Base 基础样式
   ============================================================ */

:root {
  --color-bg: #1a1a2e;
  --color-accent: #e94560;
  --color-white: #ffffff;
  --color-light: #f5f5f5;
  --color-gold: #ffd700;
  --color-text: #2d2d3a;
  --color-text-muted: #6b6b7a;
  --color-border: #e8e8ef;
  --color-card-bg: #ffffff;
  --color-section-bg: #f0f0f6;
  --font-family: "Noto Sans SC", -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --container-width: 1200px;
  --container-padding: 24px;
  --header-height: 72px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
}

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

html {
  font-size: 16px;
  line-height: 1.6;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

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

a:hover {
  color: #c2185b;
}

ul,
ol {
  list-style: none;
}

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

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

/* ============================================================
   Layout 布局骨架
   ============================================================ */

.site-header {
  background-color: var(--color-bg);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  position: sticky;
  top: 0;
  z-index: 100;
}

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

.brand {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
  flex-shrink: 0;
}

.brand-name {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-white);
  letter-spacing: 0.02em;
}

.brand-slogan {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.55);
  margin-top: 2px;
}

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

.site-nav .nav-list a {
  display: block;
  padding: 10px 16px;
  color: rgba(255, 255, 255, 0.75);
  font-size: 15px;
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.site-nav .nav-list a:hover {
  color: var(--color-white);
  background-color: rgba(255, 255, 255, 0.08);
}

.site-nav .nav-list a.is-current {
  color: var(--color-white);
  background-color: var(--color-accent);
}

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

.nav-toggle-bar {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--color-white);
  border-radius: 1px;
  transition: transform var(--transition-normal), opacity var(--transition-normal);
}

.site-main.inner-main {
  background-color: var(--color-light);
}

.site-main.home-main {
  background-color: var(--color-bg);
}

/* 面包屑 */
.breadcrumb {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 20px var(--container-padding) 0;
  font-size: 14px;
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}

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

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

.breadcrumb-sep {
  color: #b0b0bd;
}

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

/* 内页标题区 */
.page-header {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 32px var(--container-padding) 8px;
}

.page-title {
  font-size: 32px;
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.3;
  margin-bottom: 12px;
}

.page-description {
  font-size: 16px;
  color: var(--color-text-muted);
  max-width: 720px;
  line-height: 1.7;
}

/* 页脚 */
.site-footer {
  background-color: var(--color-bg);
  color: rgba(255, 255, 255, 0.7);
  margin-top: auto;
}

.footer-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px var(--container-padding) 32px;
  display: grid;
  grid-template-columns: 1.2fr 2fr;
  gap: 48px;
}

.footer-brand-name {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 8px;
}

.footer-brand-desc {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.55);
  max-width: 320px;
}

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

.footer-link-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-white);
  margin-bottom: 12px;
}

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

.footer-links ul a {
  color: rgba(255, 255, 255, 0.6);
  font-size: 14px;
}

.footer-links ul a:hover {
  color: var(--color-gold);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 20px var(--container-padding);
  text-align: center;
}

.footer-bottom p {
  max-width: var(--container-width);
  margin: 0 auto;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.45);
}

/* ============================================================
   Components 通用组件
   ============================================================ */

/* 区块标题 */
.section-title {
  font-size: 24px;
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.4;
  margin-bottom: 8px;
}

.section-desc {
  font-size: 15px;
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: 24px;
  max-width: 680px;
}

/* 按钮 */
.btn-primary,
.btn-secondary {
  display: inline-block;
  padding: 12px 24px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
}

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

.btn-primary:hover {
  background-color: #c2185b;
  color: var(--color-white);
  transform: translateY(-1px);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-white);
  border: 1px solid rgba(255, 255, 255, 0.5);
}

.btn-secondary:hover {
  border-color: var(--color-white);
  color: var(--color-white);
  background-color: rgba(255, 255, 255, 0.08);
}

/* 步骤列表 */
.step-list {
  counter-reset: step-counter;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.step-item {
  position: relative;
  padding: 20px 24px 20px 64px;
  background-color: var(--color-card-bg);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  counter-increment: step-counter;
}

.step-item::before {
  content: counter(step-counter);
  position: absolute;
  left: 20px;
  top: 20px;
  width: 32px;
  height: 32px;
  background-color: var(--color-accent);
  color: var(--color-white);
  font-size: 15px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
}

.step-item h3 {
  font-size: 17px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 6px;
}

.step-item p {
  font-size: 15px;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* FAQ 折叠 */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.faq-item summary {
  padding: 16px 20px;
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text);
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  transition: color var(--transition-fast);
}

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

.faq-item summary::after {
  content: "+";
  font-size: 20px;
  color: var(--color-accent);
  flex-shrink: 0;
  transition: transform var(--transition-normal);
}

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

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

.faq-item p {
  padding: 0 20px 16px;
  font-size: 15px;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* ============================================================
   Pages 首页
   ============================================================ */

/* 首屏焦点区 */
.hero-section {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 56px var(--container-padding) 48px;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}

.hero-title {
  font-size: 40px;
  font-weight: 700;
  color: var(--color-white);
  line-height: 1.25;
  margin-bottom: 16px;
}

.hero-desc {
  font-size: 17px;
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.8;
  margin-bottom: 20px;
  max-width: 520px;
}

.hero-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 28px;
  flex-wrap: wrap;
}

.hero-date {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.55);
}

.hero-status {
  font-size: 13px;
  color: var(--color-gold);
  border: 1px solid rgba(255, 215, 0, 0.4);
  padding: 3px 10px;
  border-radius: 20px;
  letter-spacing: 0.02em;
}

.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.hero-figure {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  background-color: #26264a;
}

.hero-figure img {
  width: 100%;
  height: 380px;
  object-fit: cover;
}

.hero-figure figcaption {
  position: absolute;
  left: 16px;
  bottom: 16px;
  font-size: 13px;
  color: var(--color-white);
  background-color: rgba(26, 26, 46, 0.85);
  padding: 6px 14px;
  border-radius: 20px;
}

/* 频道标签带 */
.channel-tabs-section {
  background-color: #23234a;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  padding: 48px 0;
}

.channel-tabs-section .section-title {
  color: var(--color-white);
}

.channel-tabs-section .section-desc {
  color: rgba(255, 255, 255, 0.6);
}

.channel-tabs-section > .section-title,
.channel-tabs-section > .section-desc,
.channel-tabs-list {
  max-width: var(--container-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
}

.channel-tabs-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.channel-tabs-list a {
  display: inline-block;
  padding: 10px 20px;
  background-color: rgba(255, 255, 255, 0.08);
  color: rgba(255, 255, 255, 0.85);
  font-size: 15px;
  font-weight: 500;
  border-radius: 24px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  transition: background-color var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
}

.channel-tabs-list a:hover {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-white);
}

/* 专题卡片区 */
.topic-cards-section {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 56px var(--container-padding);
}

.topic-cards-section .section-title,
.topic-cards-section .section-desc {
  color: var(--color-white);
}

.topic-cards-section .section-desc {
  color: rgba(255, 255, 255, 0.6);
}

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

.topic-card {
  background-color: #26264a;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.08);
  transition: transform var(--transition-normal), border-color var(--transition-normal);
}

.topic-card:hover {
  transform: translateY(-4px);
  border-color: rgba(233, 69, 96, 0.5);
}

.topic-card img {
  width: 100%;
  height: 220px;
  object-fit: cover;
}

.topic-card-title {
  font-size: 20px;
  font-weight: 600;
  color: var(--color-white);
  padding: 20px 20px 0;
  line-height: 1.4;
}

.topic-card-desc {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
  padding: 10px 20px 0;
  line-height: 1.7;
}

.topic-card-link {
  display: inline-block;
  margin: 16px 20px 20px;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-gold);
}

.topic-card-link:hover {
  color: var(--color-white);
}

/* 最新更新列表 */
.update-list-section {
  background-color: var(--color-light);
  padding: 56px 0;
}

.update-list-section > .section-title,
.update-list-section > .section-desc,
.update-list {
  max-width: var(--container-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
}

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

.update-item {
  background-color: var(--color-card-bg);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  overflow: hidden;
  transition: box-shadow var(--transition-fast);
}

.update-item:hover {
  box-shadow: 0 4px 16px rgba(26, 26, 46, 0.08);
}

.update-entry {
  padding: 20px 24px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 16px;
  align-items: start;
}

.update-title {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 6px;
}

.update-title a {
  color: var(--color-text);
}

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

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

.update-date {
  font-size: 13px;
  color: var(--color-text-muted);
  white-space: nowrap;
  padding-top: 4px;
}

/* 指南入口 */
.guide-entry-section {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 56px var(--container-padding);
}

.guide-entry-section .section-title,
.guide-entry-section .section-desc {
  color: var(--color-white);
}

.guide-entry-section .section-desc {
  color: rgba(255, 255, 255, 0.6);
}

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

.guide-entry-card {
  background-color: #26264a;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  padding: 32px;
  transition: border-color var(--transition-fast), transform var(--transition-fast);
}

.guide-entry-card:hover {
  border-color: rgba(233, 69, 96, 0.5);
  transform: translateY(-2px);
}

.guide-entry-title {
  font-size: 20px;
  font-weight: 600;
  color: var(--color-white);
  margin-bottom: 10px;
}

.guide-entry-desc {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
  line-height: 1.7;
  margin-bottom: 16px;
}

.guide-entry-link {
  display: inline-block;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-gold);
}

.guide-entry-link:hover {
  color: var(--color-white);
}

/* ============================================================
   Pages 频道分类页
   ============================================================ */

.channel-grid {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 32px var(--container-padding);
}

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

.channel-card {
  background-color: var(--color-card-bg);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  overflow: hidden;
  transition: box-shadow var(--transition-fast), transform var(--transition-fast);
}

.channel-card:hover {
  box-shadow: 0 6px 20px rgba(26, 26, 46, 0.1);
  transform: translateY(-3px);
}

.channel-card img {
  width: 100%;
  height: 180px;
  object-fit: cover;
}

.channel-name {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text);
  padding: 16px 20px 0;
}

.channel-desc {
  font-size: 14px;
  color: var(--color-text-muted);
  padding: 8px 20px 0;
  line-height: 1.7;
}

.channel-link {
  display: inline-block;
  margin: 12px 20px 20px;
  font-size: 14px;
  font-weight: 600;
}

/* 频道专题关联 */
.channel-topic-assoc {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 8px var(--container-padding) 56px;
}

.assoc-intro {
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
  margin-bottom: 20px;
}

.assoc-intro p {
  font-size: 15px;
  color: var(--color-text-muted);
  line-height: 1.8;
  margin-bottom: 8px;
}

.assoc-intro p:last-child {
  margin-bottom: 0;
}

.assoc-links {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.assoc-link {
  display: inline-block;
  padding: 10px 20px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text);
  transition: border-color var(--transition-fast), color var(--transition-fast);
}

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

/* ============================================================
   Pages 内容专题页
   ============================================================ */

.topic-list {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 32px var(--container-padding) 8px;
}

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

.topic-card {
  background-color: var(--color-card-bg);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: box-shadow var(--transition-fast);
}

.topic-card:hover {
  box-shadow: 0 6px 20px rgba(26, 26, 46, 0.1);
}

.topic-media {
  overflow: hidden;
}

.topic-image {
  width: 100%;
  height: 200px;
  object-fit: cover;
  transition: transform var(--transition-normal);
}

.topic-card:hover .topic-image {
  transform: scale(1.03);
}

.topic-content {
  padding: 20px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.topic-name {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 8px;
}

.topic-summary {
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: 16px;
  flex: 1;
}

.topic-link {
  font-size: 14px;
  font-weight: 600;
  align-self: flex-start;
}

/* 专题预览 */
.topic-preview {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 40px var(--container-padding) 8px;
}

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

.preview-item {
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.preview-media {
  overflow: hidden;
}

.preview-image {
  width: 100%;
  height: 180px;
  object-fit: cover;
}

.preview-text {
  padding: 20px;
}

.preview-title {
  font-size: 17px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 8px;
}

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

.preview-note {
  margin-top: 24px;
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.8;
}

.preview-note a {
  font-weight: 600;
}

/* 相关链接 */
.related-links {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 24px var(--container-padding) 56px;
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

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

.related-links-item {
  font-size: 14px;
  color: var(--color-text-muted);
  padding: 6px 14px;
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: 20px;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

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

/* ============================================================
   Pages 观看指南页
   ============================================================ */

.guide-hero-media {
  max-width: var(--container-width);
  margin: 24px auto 0;
  padding: 0 var(--container-padding);
}

.guide-hero-media img {
  width: 100%;
  height: 320px;
  object-fit: cover;
  border-radius: var(--radius-md);
}

.guide-hero-media figcaption {
  font-size: 13px;
  color: var(--color-text-muted);
  margin-top: 8px;
  text-align: center;
}

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

.guide-section > h2 {
  font-size: 24px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 12px;
}

.guide-section > p {
  font-size: 15px;
  color: var(--color-text-muted);
  line-height: 1.8;
  margin-bottom: 20px;
  max-width: 720px;
}

/* 核验卡片 */
.verify-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.verify-card {
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: box-shadow var(--transition-fast);
}

.verify-card:hover {
  box-shadow: 0 4px 16px rgba(26, 26, 46, 0.08);
}

.verify-card h3 {
  font-size: 17px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 8px;
}

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

/* 相关推荐 */
.related-section {
  padding-bottom: 56px;
}

.related-section p {
  margin-bottom: 0;
}

.related-section a {
  font-weight: 600;
  margin-right: 16px;
}

/* ============================================================
   Pages 问题反馈页
   ============================================================ */

.problem-section,
.cause-section,
.steps-section,
.escalation-section,
.feedback-section {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 32px var(--container-padding) 0;
}

.problem-section > h2,
.cause-section > h2,
.steps-section > h2,
.escalation-section > h2,
.feedback-section > h2 {
  font-size: 24px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 12px;
}

.problem-section > p,
.cause-section > p,
.escalation-section > p,
.feedback-section > p {
  font-size: 15px;
  color: var(--color-text-muted);
  line-height: 1.8;
  max-width: 720px;
}

.problem-figure {
  margin-top: 20px;
  border-radius: var(--radius-md);
  overflow: hidden;
}

.problem-figure img {
  width: 100%;
  height: 260px;
  object-fit: cover;
}

/* 原因列表 */
.cause-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 16px;
}

.cause-list li {
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  font-size: 15px;
  color: var(--color-text);
  line-height: 1.7;
  position: relative;
  padding-left: 48px;
}

.cause-list li::before {
  content: "!";
  position: absolute;
  left: 16px;
  top: 16px;
  width: 22px;
  height: 22px;
  background-color: var(--color-gold);
  color: var(--color-bg);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
}

/* 升级路径 */
.escalation-section p a {
  font-weight: 600;
  margin-right: 16px;
}

/* 反馈列表 */
.feedback-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin: 16px 0;
}

.feedback-list li {
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  font-size: 15px;
  color: var(--color-text);
  line-height: 1.7;
}

.feedback-section > p:last-child {
  margin-top: 16px;
}

.feedback-section > p:last-child a {
  display: inline-block;
  padding: 12px 24px;
  background-color: var(--color-accent);
  color: var(--color-white);
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  transition: background-color var(--transition-fast);
}

.feedback-section > p:last-child a:hover {
  background-color: #c2185b;
}

/* ============================================================
   Pages 404
   ============================================================ */

.error-main {
  background-color: var(--color-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: calc(100vh - var(--header-height) - 260px);
}

.error-section {
  text-align: center;
  padding: 80px var(--container-padding);
  max-width: 640px;
}

.error-code {
  font-size: 96px;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1;
  margin-bottom: 16px;
}

.error-section h1 {
  font-size: 28px;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 12px;
}

.error-desc {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 8px;
}

.error-hint {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.5);
  margin-bottom: 32px;
}

.error-home-btn {
  display: inline-block;
  padding: 12px 32px;
  background-color: var(--color-accent);
  color: var(--color-white);
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast);
}

.error-home-btn:hover {
  background-color: #c2185b;
  color: var(--color-white);
}

/* ============================================================
   Responsive 响应式
   ============================================================ */

@media (max-width: 1024px) {
  .channel-grid-list {
    grid-template-columns: repeat(2, 1fr);
  }

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

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

  .hero-figure img {
    height: 320px;
  }
}

@media (max-width: 768px) {
  .header-inner {
    min-height: 60px;
    gap: 12px;
  }

  .brand-name {
    font-size: 18px;
  }

  .brand-slogan {
    font-size: 11px;
  }

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    background-color: var(--color-bg);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
  }

  .site-nav .nav-list {
    flex-direction: column;
    align-items: stretch;
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-normal);
  }

  .site-nav .nav-list.is-open {
    max-height: 320px;
  }

  .site-nav .nav-list a {
    padding: 14px 24px;
    border-radius: 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  }

  .site-nav .nav-list a.is-current {
    background-color: rgba(233, 69, 96, 0.15);
    color: var(--color-accent);
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 32px;
    padding: 40px var(--container-padding) 24px;
  }

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

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

  .hero-title {
    font-size: 32px;
  }

  .topic-cards-grid,
  .guide-entry-grid,
  .topic-grid,
  .preview-layout {
    grid-template-columns: 1fr;
  }

  .update-entry {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .update-date {
    white-space: normal;
  }

  .channel-grid-list {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 480px) {
  :root {
    --container-padding: 16px;
  }

  .hero-section {
    padding: 40px var(--container-padding) 36px;
  }

  .hero-title {
    font-size: 26px;
  }

  .hero-desc {
    font-size: 15px;
  }

  .hero-figure img {
    height: 220px;
  }

  .section-title {
    font-size: 20px;
  }

  .topic-card img {
    height: 180px;
  }

  .guide-hero-media img {
    height: 200px;
  }

  .problem-figure img {
    height: 180px;
  }

  .error-code {
    font-size: 72px;
  }

  .error-section h1 {
    font-size: 22px;
  }

  .step-item {
    padding: 16px 16px 16px 56px;
  }

  .step-item::before {
    left: 14px;
    top: 16px;
    width: 28px;
    height: 28px;
    font-size: 14px;
  }

  .guide-entry-card {
    padding: 24px;
  }
}