/* ==========================================================================
   午夜影视 - 全站样式表
   复古计算机风：像素感点缀、等宽字体、深色背景 + 高饱和霓虹色块
   ========================================================================== */

/* --------------------------------------------------------------------------
   Base / 基础
   -------------------------------------------------------------------------- */
:root {
  --color-bg: #0d0f1a;
  --color-bg-card: #2a2e45;
  --color-bg-card-hover: #343a55;
  --color-text: #f0e9d0;
  --color-text-dim: #a8a494;
  --color-neon-red: #ff4d6d;
  --color-neon-cyan: #00d9c0;
  --color-neon-amber: #ffba08;
  --color-border: #3a3f5c;
  --color-border-pixel: #4a5070;
  --font-mono: "Courier New", Courier, monospace;
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --container-width: 1200px;
  --radius-card: 6px;
  --radius-btn: 4px;
  --header-height: 64px;
  --transition-fast: 0.2s ease;
  --transition-slow: 0.35s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

a:hover {
  color: var(--color-neon-amber);
}

ul,
ol {
  list-style: none;
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-mono);
  letter-spacing: 0.05em;
  line-height: 1.3;
  color: var(--color-text);
}

h1 {
  font-size: 1.8rem;
}

h2 {
  font-size: 1.4rem;
}

h3 {
  font-size: 1.1rem;
}

p {
  margin-bottom: 12px;
}

strong {
  color: var(--color-text);
  font-weight: 600;
}

/* 视觉隐藏，仅屏幕阅读器可读 */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* --------------------------------------------------------------------------
   Layout / 布局骨架
   -------------------------------------------------------------------------- */

.site-body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  background-color: var(--color-bg);
}

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

/* 内页统一主容器 */
.inner-main {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px 64px;
}

/* --------------------------------------------------------------------------
   Header / 页头
   -------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  width: 100%;
  height: var(--header-height);
  background-color: rgba(13, 15, 26, 0.96);
  border-bottom: 2px solid var(--color-border-pixel);
  box-shadow: 0 2px 0 rgba(0, 217, 192, 0.15);
}

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

.brand-link {
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
  text-decoration: none;
}

.brand-name {
  font-family: var(--font-mono);
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--color-neon-cyan);
  text-shadow: 2px 2px 0 rgba(255, 77, 109, 0.4);
  border: 2px solid var(--color-neon-cyan);
  padding: 4px 10px;
  background-color: rgba(0, 217, 192, 0.08);
}

.brand-name::before {
  content: ">_";
  color: var(--color-neon-amber);
  margin-right: 6px;
}

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

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

.nav-list li {
  position: relative;
}

.nav-list li + li::before {
  content: "/";
  font-family: var(--font-mono);
  color: var(--color-border-pixel);
  margin: 0 6px;
  font-size: 0.85rem;
}

.nav-list a {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.92rem;
  letter-spacing: 0.04em;
  color: var(--color-text-dim);
  padding: 8px 10px;
  border: 1px solid transparent;
  border-radius: var(--radius-btn);
  transition: color var(--transition-fast), border-color var(--transition-fast),
    background-color var(--transition-fast);
}

.nav-list a:hover {
  color: var(--color-neon-cyan);
  border-color: var(--color-border);
  background-color: rgba(0, 217, 192, 0.06);
}

.nav-list a.is-current {
  color: var(--color-neon-amber);
  border-color: var(--color-neon-amber);
  background-color: rgba(255, 186, 8, 0.08);
  text-shadow: 0 0 8px rgba(255, 186, 8, 0.3);
}

/* 移动端汉堡按钮 */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  background: transparent;
  border: 2px solid var(--color-border-pixel);
  border-radius: var(--radius-btn);
  cursor: pointer;
  padding: 8px;
  transition: border-color var(--transition-fast);
}

.nav-toggle:hover {
  border-color: var(--color-neon-cyan);
}

.nav-toggle-line {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--color-neon-cyan);
  transition: background-color var(--transition-fast);
}

.nav-toggle:hover .nav-toggle-line {
  background-color: var(--color-neon-amber);
}

/* --------------------------------------------------------------------------
   Footer / 页脚
   -------------------------------------------------------------------------- */
.site-footer {
  width: 100%;
  background-color: #0a0c15;
  border-top: 2px solid var(--color-border-pixel);
  margin-top: auto;
}

.footer-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px 24px 32px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}

.footer-col h3 {
  font-size: 0.95rem;
  color: var(--color-neon-cyan);
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px dashed var(--color-border-pixel);
  text-transform: uppercase;
}

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

.footer-links a {
  font-size: 0.9rem;
  color: var(--color-text-dim);
  transition: color var(--transition-fast), padding-left var(--transition-fast);
}

.footer-links a:hover {
  color: var(--color-neon-amber);
  padding-left: 4px;
}

.footer-bottom {
  border-top: 1px solid var(--color-border);
  padding: 20px 24px;
  text-align: center;
}

.footer-bottom p {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--color-text-dim);
  letter-spacing: 0.05em;
  margin: 0;
}

.footer-note {
  font-size: 0.85rem;
}

/* --------------------------------------------------------------------------
   Breadcrumb / 面包屑
   -------------------------------------------------------------------------- */
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  padding: 20px 0 12px;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  color: var(--color-text-dim);
}

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

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

.breadcrumb-sep {
  color: var(--color-border-pixel);
}

.breadcrumb-current {
  color: var(--color-neon-amber);
}

/* --------------------------------------------------------------------------
   Page Header / 内页标题区
   -------------------------------------------------------------------------- */
.page-header {
  padding: 16px 0 28px;
  border-bottom: 1px dashed var(--color-border-pixel);
  margin-bottom: 36px;
}

.page-title {
  font-size: 1.8rem;
  color: var(--color-text);
  margin-bottom: 8px;
  position: relative;
  padding-left: 16px;
}

.page-title::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  bottom: 6px;
  width: 4px;
  background-color: var(--color-neon-red);
  box-shadow: 0 0 8px rgba(255, 77, 109, 0.5);
}

.page-description {
  color: var(--color-text-dim);
  font-size: 0.98rem;
  max-width: 760px;
  margin: 0;
}

/* --------------------------------------------------------------------------
   Section Title / 区块标题
   -------------------------------------------------------------------------- */
.section-title {
  font-size: 1.3rem;
  color: var(--color-text);
  margin-bottom: 20px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--color-border);
  position: relative;
}

.section-title::after {
  content: "//";
  font-family: var(--font-mono);
  color: var(--color-neon-cyan);
  margin-left: 8px;
  font-size: 0.9em;
}

.section-desc {
  color: var(--color-text-dim);
  font-size: 0.95rem;
  max-width: 720px;
  margin-bottom: 24px;
}

/* --------------------------------------------------------------------------
   Buttons / 按钮
   -------------------------------------------------------------------------- */
.btn-primary,
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 24px;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  letter-spacing: 0.06em;
  border-radius: var(--radius-btn);
  cursor: pointer;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast),
    background-color var(--transition-fast), color var(--transition-fast);
  text-decoration: none;
}

.btn-primary {
  background-color: var(--color-neon-red);
  color: #fff;
  border: 2px solid var(--color-neon-red);
  box-shadow: 3px 3px 0 rgba(255, 77, 109, 0.3);
}

.btn-primary:hover {
  background-color: #ff6b85;
  color: #fff;
  transform: translate(-1px, -1px);
  box-shadow: 4px 4px 0 rgba(255, 77, 109, 0.4);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-neon-cyan);
  border: 2px solid var(--color-neon-cyan);
  box-shadow: 3px 3px 0 rgba(0, 217, 192, 0.2);
}

.btn-secondary:hover {
  background-color: rgba(0, 217, 192, 0.1);
  color: var(--color-neon-amber);
  border-color: var(--color-neon-amber);
  transform: translate(-1px, -1px);
  box-shadow: 4px 4px 0 rgba(255, 186, 8, 0.25);
}

/* --------------------------------------------------------------------------
   Text Link / 文字链接
   -------------------------------------------------------------------------- */
.text-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.92rem;
  color: var(--color-neon-cyan);
  padding: 4px 0;
  border-bottom: 1px dashed transparent;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.text-link::after {
  content: "→";
  font-size: 1.1em;
  transition: transform var(--transition-fast);
}

.text-link:hover {
  color: var(--color-neon-amber);
  border-bottom-color: var(--color-neon-amber);
}

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

.section-more {
  margin-top: 28px;
  text-align: right;
}

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

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

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

.faq-item summary {
  cursor: pointer;
  padding: 16px 20px;
  font-family: var(--font-mono);
  font-size: 0.98rem;
  color: var(--color-text);
  list-style: none;
  position: relative;
  padding-right: 44px;
  user-select: none;
  transition: color var(--transition-fast);
}

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

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

.faq-item summary::before {
  content: "[+]";
  font-family: var(--font-mono);
  color: var(--color-neon-cyan);
  margin-right: 10px;
}

.faq-item summary::after {
  content: "▾";
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-neon-cyan);
  font-size: 0.8rem;
  transition: transform var(--transition-fast);
}

.faq-item[open] summary {
  color: var(--color-neon-amber);
  border-bottom: 1px dashed var(--color-border);
}

.faq-item[open] summary::before {
  content: "[-]";
  color: var(--color-neon-amber);
}

.faq-item[open] summary::after {
  transform: translateY(-50%) rotate(180deg);
}

.faq-item > p {
  padding: 16px 20px;
  margin: 0;
  font-size: 0.95rem;
  color: var(--color-text-dim);
}

/* --------------------------------------------------------------------------
   Hero / 首页首屏
   -------------------------------------------------------------------------- */
.hero-section {
  width: 100%;
  background-color: #11142a;
  border-bottom: 2px solid var(--color-border-pixel);
  position: relative;
}

.hero-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(
    circle at 20% 30%,
    rgba(255, 77, 109, 0.08) 0%,
    transparent 50%
  );
  pointer-events: none;
}

.hero-content {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 72px 24px 56px;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-title {
  font-size: 2.2rem;
  line-height: 1.25;
  margin-bottom: 16px;
  color: var(--color-text);
}

.hero-title span {
  color: var(--color-neon-cyan);
}

.hero-tagline {
  font-size: 1.05rem;
  color: var(--color-text-dim);
  margin-bottom: 28px;
  max-width: 520px;
}

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

.hero-figure {
  margin: 0;
  border: 2px solid var(--color-border-pixel);
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow: 6px 6px 0 rgba(0, 217, 192, 0.15);
  background-color: var(--color-bg-card);
}

.hero-figure img {
  width: 100%;
  height: 340px;
  object-fit: cover;
}

/* --------------------------------------------------------------------------
   Channel Tags / 首页频道标签
   -------------------------------------------------------------------------- */
.channel-tags {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 56px 24px 32px;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.tag-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 20px;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: var(--color-text);
  background-color: var(--color-bg-card);
  border: 2px solid var(--color-border-pixel);
  border-radius: var(--radius-btn);
  transition: all var(--transition-fast);
  text-decoration: none;
}

.tag-item::before {
  content: "▮";
  color: var(--color-neon-cyan);
  font-size: 0.8rem;
}

.tag-item:hover {
  border-color: var(--color-neon-cyan);
  color: var(--color-neon-cyan);
  background-color: rgba(0, 217, 192, 0.08);
  transform: translateY(-2px);
  box-shadow: 0 4px 0 rgba(0, 217, 192, 0.2);
}

/* --------------------------------------------------------------------------
   Collection Preview / 首页专题片单预览
   -------------------------------------------------------------------------- */
.collection-preview {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 32px 24px;
}

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

.collection-card {
  background-color: var(--color-bg-card);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-card);
  overflow: hidden;
  transition: transform var(--transition-fast), border-color var(--transition-fast),
    box-shadow var(--transition-fast);
  display: flex;
  flex-direction: column;
}

.collection-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-neon-cyan);
  box-shadow: 4px 4px 0 rgba(0, 217, 192, 0.2);
}

.collection-card img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  border-bottom: 2px solid var(--color-border);
}

.collection-card .card-title {
  font-size: 1.05rem;
  padding: 16px 16px 4px;
  margin: 0;
  color: var(--color-neon-amber);
}

.collection-card .card-desc {
  padding: 0 16px;
  font-size: 0.9rem;
  color: var(--color-text-dim);
  flex: 1 0 auto;
  margin-bottom: 12px;
}

.collection-card .card-link {
  display: inline-block;
  margin: 0 16px 16px;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  color: var(--color-neon-cyan);
  padding: 6px 0;
  border-bottom: 1px dashed transparent;
  align-self: flex-start;
}

.collection-card .card-link:hover {
  color: var(--color-neon-amber);
  border-bottom-color: var(--color-neon-amber);
}

/* --------------------------------------------------------------------------
   Guide Entry / 首页观看指南入口
   -------------------------------------------------------------------------- */
.guide-entry {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 32px 24px;
}

.step-flow {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 8px;
}

.step-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 20px;
  transition: border-color var(--transition-fast);
}

.step-item:hover {
  border-color: var(--color-neon-cyan);
}

.step-num {
  font-family: var(--font-mono);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--color-neon-red);
  line-height: 1;
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px solid var(--color-neon-red);
  border-radius: var(--radius-btn);
  background-color: rgba(255, 77, 109, 0.08);
}

.step-text h3 {
  font-size: 1rem;
  color: var(--color-text);
  margin-bottom: 6px;
}

.step-text p {
  font-size: 0.88rem;
  color: var(--color-text-dim);
  margin: 0;
}

/* --------------------------------------------------------------------------
   Misconception Preview / 首页误区精选
   -------------------------------------------------------------------------- */
.misconception-preview {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 32px 24px;
}

/* --------------------------------------------------------------------------
   Boundary Statement / 服务边界声明
   -------------------------------------------------------------------------- */
.boundary-statement {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 40px 24px;
}

.boundary-statement .section-title {
  border-bottom-color: var(--color-neon-red);
}

.boundary-statement p {
  font-size: 1rem;
  color: var(--color-text-dim);
  max-width: 720px;
  margin-bottom: 16px;
}

.boundary-statement strong {
  color: var(--color-neon-red);
  font-family: var(--font-mono);
}

/* --------------------------------------------------------------------------
   Home Main / 首页主导航
   -------------------------------------------------------------------------- */
.home-main {
  width: 100%;
}

/* --------------------------------------------------------------------------
   Channels Page / 频道分类页
   -------------------------------------------------------------------------- */
.layout-shell {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 32px;
  align-items: start;
}

.sidebar-left {
  grid-template-columns: 240px 1fr;
}

/* 侧栏 */
.filter-sidebar {
  background-color: var(--color-bg-card);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 20px;
  position: sticky;
  top: calc(var(--header-height) + 20px);
}

.sidebar-title {
  font-size: 1rem;
  color: var(--color-neon-cyan);
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px dashed var(--color-border-pixel);
}

.filter-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.filter-list li {
  margin: 0;
}

.filter-tag {
  display: block;
  padding: 10px 12px;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--color-text-dim);
  border: 1px solid transparent;
  border-radius: var(--radius-btn);
  transition: all var(--transition-fast);
}

.filter-tag:hover {
  color: var(--color-neon-cyan);
  background-color: rgba(0, 217, 192, 0.06);
  border-color: var(--color-border);
}

.filter-tag.is-active {
  color: var(--color-neon-amber);
  background-color: rgba(255, 186, 8, 0.08);
  border-color: var(--color-neon-amber);
}

.filter-tip {
  margin-top: 16px;
  padding-top: 12px;
  border-top: 1px dashed var(--color-border);
  font-size: 0.82rem;
  color: var(--color-text-dim);
  line-height: 1.6;
}

/* 频道列表 */
.channel-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.channel-card {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 20px;
  background-color: var(--color-bg-card);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 16px;
  transition: border-color var(--transition-fast), transform var(--transition-fast);
}

.channel-card:hover {
  border-color: var(--color-neon-cyan);
  transform: translateX(4px);
}

.channel-media {
  overflow: hidden;
  border-radius: var(--radius-card);
  border: 1px solid var(--color-border);
}

.channel-media img {
  width: 100%;
  height: 140px;
  object-fit: cover;
}

.channel-info {
  display: flex;
  flex-direction: column;
}

.channel-name {
  font-size: 1.1rem;
  color: var(--color-neon-amber);
  margin-bottom: 8px;
}

.channel-desc {
  font-size: 0.92rem;
  color: var(--color-text-dim);
  margin-bottom: 8px;
}

.channel-advice {
  font-size: 0.88rem;
  color: var(--color-text-dim);
  margin-bottom: 8px;
}

.channel-advice strong {
  color: var(--color-neon-cyan);
  font-family: var(--font-mono);
}

.channel-info .text-link {
  margin-top: auto;
  align-self: flex-start;
}

/* 频道提示 */
.channel-tips {
  margin-top: 32px;
  background-color: var(--color-bg-card);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 24px;
}

.tips-heading {
  font-size: 1.05rem;
  color: var(--color-neon-cyan);
  margin-bottom: 16px;
}

.tips-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  counter-reset: tips-counter;
}

.tips-list li {
  counter-increment: tips-counter;
  display: flex;
  gap: 12px;
  font-size: 0.92rem;
  color: var(--color-text-dim);
}

.tips-list li::before {
  content: counter(tips-counter, decimal-leading-zero);
  font-family: var(--font-mono);
  color: var(--color-neon-red);
  font-size: 0.85rem;
  flex-shrink: 0;
}

.tips-more {
  margin-top: 16px;
  display: flex;
  gap: 20px;
}

.tips-more a {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--color-neon-cyan);
}

.tips-more a:hover {
  color: var(--color-neon-amber);
}

/* --------------------------------------------------------------------------
   Collections Page / 专题片单页
   -------------------------------------------------------------------------- */
.filter-toolbar {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  padding: 16px 20px;
  background-color: var(--color-bg-card);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-card);
  margin-bottom: 32px;
}

.filter-label {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--color-neon-amber);
  margin-right: 8px;
}

.filter-toolbar a {
  display: inline-block;
  padding: 8px 14px;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  color: var(--color-text-dim);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-btn);
  transition: all var(--transition-fast);
}

.filter-toolbar a:hover {
  color: var(--color-neon-cyan);
  border-color: var(--color-neon-cyan);
}

.filter-toolbar a.is-active {
  color: var(--color-neon-amber);
  border-color: var(--color-neon-amber);
  background-color: rgba(255, 186, 8, 0.08);
}

.collection-grid {
  margin-bottom: 40px;
}

.collection-grid .collection-card {
  background-color: var(--color-bg-card);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-card);
  overflow: hidden;
  transition: transform var(--transition-fast), border-color var(--transition-fast);
}

.collection-grid .collection-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-neon-cyan);
}

.card-figure {
  margin: 0;
  position: relative;
  overflow: hidden;
}

.card-image {
  width: 100%;
  height: 160px;
  object-fit: cover;
}

.card-caption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 8px 12px;
  background-color: rgba(13, 15, 26, 0.85);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--color-neon-cyan);
  text-align: right;
}

.card-content {
  padding: 16px;
  display: flex;
  flex-direction: column;
}

.card-content .card-title {
  font-size: 1rem;
  color: var(--color-neon-amber);
  margin-bottom: 8px;
}

.card-content .card-desc {
  font-size: 0.88rem;
  color: var(--color-text-dim);
  margin-bottom: 12px;
  flex: 1 0 auto;
}

.card-content .card-link {
  align-self: flex-start;
  font-family: var(--font-mono);
  font-size: 0.86rem;
  color: var(--color-neon-cyan);
  padding: 4px 0;
  border-bottom: 1px dashed transparent;
}

.card-content .card-link:hover {
  color: var(--color-neon-amber);
  border-bottom-color: var(--color-neon-amber);
}

/* 片单更新说明 */
.note-section {
  background-color: var(--color-bg-card);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 28px;
  margin-bottom: 32px;
}

.note-section p {
  font-size: 0.93rem;
  color: var(--color-text-dim);
  margin-bottom: 10px;
}

/* 浏览提示 */
.browse-tip {
  background-color: rgba(0, 217, 192, 0.05);
  border: 2px dashed var(--color-neon-cyan);
  border-radius: var(--radius-card);
  padding: 24px;
}

.browse-tip p {
  font-size: 0.92rem;
  color: var(--color-text-dim);
  margin-bottom: 8px;
}

/* --------------------------------------------------------------------------
   Guide Page / 观看指南页
   -------------------------------------------------------------------------- */
.step-section {
  margin-bottom: 48px;
}

.step-section .step-item {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 20px;
  padding: 24px;
  margin-bottom: 16px;
  background-color: var(--color-bg-card);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-card);
  transition: border-color var(--transition-fast);
}

.step-section .step-item:hover {
  border-color: var(--color-neon-cyan);
}

.step-number {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--color-neon-red);
  border: 2px solid var(--color-neon-red);
  border-radius: var(--radius-btn);
  background-color: rgba(255, 77, 109, 0.08);
}

.step-content h3 {
  font-size: 1.05rem;
  color: var(--color-neon-amber);
  margin-bottom: 8px;
}

.step-content p {
  font-size: 0.92rem;
  color: var(--color-text-dim);
  margin-bottom: 4px;
}

.step-content p.step-input::before {
  content: "输入: ";
  font-family: var(--font-mono);
  color: var(--color-neon-cyan);
  font-size: 0.85rem;
}

.step-content p.step-process::before {
  content: "过程: ";
  font-family: var(--font-mono);
  color: var(--color-neon-cyan);
  font-size: 0.85rem;
}

.step-content p.step-result::before {
  content: "结果: ";
  font-family: var(--font-mono);
  color: var(--color-neon-cyan);
  font-size: 0.85rem;
}

/* 设备适配 */
.device-section {
  margin-bottom: 48px;
}

.device-figure {
  margin: 0 0 24px;
  border: 2px solid var(--color-border-pixel);
  border-radius: var(--radius-card);
  overflow: hidden;
}

.device-figure img {
  width: 100%;
  height: 280px;
  object-fit: cover;
}

.device-figure figcaption {
  padding: 10px 16px;
  background-color: var(--color-bg-card);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--color-text-dim);
  text-align: center;
}

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

.device-card {
  background-color: var(--color-bg-card);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 20px;
  transition: border-color var(--transition-fast);
}

.device-card:hover {
  border-color: var(--color-neon-cyan);
}

.device-name {
  font-size: 1rem;
  color: var(--color-neon-amber);
  margin-bottom: 8px;
}

.device-name::before {
  content: "▸ ";
  color: var(--color-neon-cyan);
}

.device-card p {
  font-size: 0.88rem;
  color: var(--color-text-dim);
  margin: 0;
}

/* 网络与播放环境 */
.network-section {
  margin-bottom: 48px;
}

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

.network-list li {
  background-color: var(--color-bg-card);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 20px;
}

.network-list h3 {
  font-size: 0.98rem;
  color: var(--color-neon-cyan);
  margin-bottom: 8px;
}

.network-list h3::before {
  content: "> ";
  color: var(--color-neon-red);
}

.network-list p {
  font-size: 0.88rem;
  color: var(--color-text-dim);
  margin: 0;
}

/* 指南 FAQ */
.faq-list .faq-item summary {
  font-size: 0.95rem;
}

.faq-list .faq-item > p {
  font-size: 0.9rem;
}

/* --------------------------------------------------------------------------
   Misconceptions Page / 常见误区页
   -------------------------------------------------------------------------- */
.misconception-section {
  margin-bottom: 40px;
}

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

.content-media-inline {
  max-width: 720px;
}

.content-media img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  border: 2px solid var(--color-border-pixel);
  border-radius: var(--radius-card);
}

.content-media figcaption {
  padding: 8px 4px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--color-text-dim);
}

.misconception-table {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.misconception-row {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 24px;
  background-color: var(--color-bg-card);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 20px 24px;
  transition: border-color var(--transition-fast);
}

.misconception-row:hover {
  border-color: var(--color-neon-cyan);
}

.misconception-col {
  display: flex;
  flex-direction: column;
}

.misconception-label {
  font-size: 0.92rem;
  font-family: var(--font-mono);
  margin-bottom: 8px;
  padding-bottom: 6px;
  border-bottom: 1px dashed var(--color-border-pixel);
}

.misconception-col:first-child .misconception-label {
  color: var(--color-neon-red);
}

.misconception-col:first-child .misconception-label::before {
  content: "✗ ";
}

.misconception-col:last-child .misconception-label {
  color: var(--color-neon-cyan);
}

.misconception-col:last-child .misconception-label::before {
  content: "✓ ";
}

.misconception-col p {
  font-size: 0.92rem;
  color: var(--color-text-dim);
  margin: 0;
  line-height: 1.7;
}

/* 使用边界提醒 */
.boundary-tip {
  margin-bottom: 40px;
  background-color: rgba(255, 77, 109, 0.06);
  border: 2px dashed var(--color-neon-red);
  border-radius: var(--radius-card);
  padding: 28px;
}

.boundary-tip .section-title {
  border-bottom-color: var(--color-neon-red);
}

.boundary-tip-content p {
  font-size: 0.95rem;
  color: var(--color-text-dim);
  margin: 0;
}

.boundary-tip-content a {
  font-family: var(--font-mono);
  color: var(--color-neon-amber);
  border-bottom: 1px dashed var(--color-neon-amber);
}

.boundary-tip-content a:hover {
  color: var(--color-neon-cyan);
  border-bottom-color: var(--color-neon-cyan);
}

/* 反馈入口 */
.feedback-entry {
  margin-bottom: 40px;
}

.feedback-content {
  background-color: var(--color-bg-card);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 24px;
}

.feedback-content p {
  font-size: 0.93rem;
  color: var(--color-text-dim);
  margin-bottom: 8px;
}

.feedback-content a {
  font-family: var(--font-mono);
  color: var(--color-neon-cyan);
  border-bottom: 1px dashed transparent;
}

.feedback-content a:hover {
  color: var(--color-neon-amber);
  border-bottom-color: var(--color-neon-amber);
}

/* --------------------------------------------------------------------------
   Rules Page / 服务规则页
   -------------------------------------------------------------------------- */
.rule-section {
  margin-bottom: 48px;
}

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

.rule-item {
  background-color: var(--color-bg-card);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 20px;
  transition: border-color var(--transition-fast);
}

.rule-item:hover {
  border-color: var(--color-neon-cyan);
}

.rule-name {
  font-size: 0.98rem;
  color: var(--color-neon-amber);
  margin-bottom: 8px;
}

.rule-name::before {
  content: "§ ";
  font-family: var(--font-mono);
  color: var(--color-neon-red);
}

.rule-text {
  font-size: 0.9rem;
  color: var(--color-text-dim);
  margin: 0;
}

/* 服务范围 */
.service-scope {
  margin-bottom: 48px;
}

.scope-media {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 32px;
  align-items: start;
  background-color: var(--color-bg-card);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 24px;
}

.scope-figure {
  margin: 0;
  border: 2px solid var(--color-border-pixel);
  border-radius: var(--radius-card);
  overflow: hidden;
}

.scope-figure img {
  width: 100%;
  height: 240px;
  object-fit: cover;
}

.scope-figure figcaption {
  padding: 8px 12px;
  background-color: rgba(13, 15, 26, 0.9);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--color-text-dim);
  text-align: center;
}

.scope-content p {
  font-size: 0.93rem;
  color: var(--color-text-dim);
  margin-bottom: 12px;
}

.scope-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 16px;
}

.scope-list li {
  font-size: 0.92rem;
  color: var(--color-text-dim);
  padding-left: 20px;
  position: relative;
}

.scope-list li::before {
  content: "▸";
  position: absolute;
  left: 0;
  color: var(--color-neon-cyan);
  font-family: var(--font-mono);
}

.scope-content a {
  font-family: var(--font-mono);
  color: var(--color-neon-cyan);
  border-bottom: 1px dashed transparent;
}

.scope-content a:hover {
  color: var(--color-neon-amber);
  border-bottom-color: var(--color-neon-amber);
}

/* 内容导航原则 */
.content-principle {
  margin-bottom: 48px;
}

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

.principle-card {
  background-color: var(--color-bg-card);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 20px;
  transition: border-color var(--transition-fast);
}

.principle-card:hover {
  border-color: var(--color-neon-cyan);
}

.principle-name {
  font-size: 0.98rem;
  color: var(--color-neon-cyan);
  margin-bottom: 8px;
}

.principle-name::before {
  content: "> ";
  color: var(--color-neon-red);
}

.principle-text {
  font-size: 0.9rem;
  color: var(--color-text-dim);
  margin: 0;
}

.principle-note {
  margin-top: 20px;
  font-size: 0.9rem;
  color: var(--color-text-dim);
  background-color: rgba(255, 186, 8, 0.05);
  border-left: 3px solid var(--color-neon-amber);
  padding: 12px 16px;
}

/* 用户行为要求 */
.user-conduct {
  margin-bottom: 48px;
}

.conduct-table {
  border: 2px solid var(--color-border);
  border-radius: var(--radius-card);
  overflow: hidden;
  margin-bottom: 16px;
}

.conduct-row {
  display: grid;
  grid-template-columns: 1fr 1fr 1.4fr;
  gap: 16px;
  padding: 14px 20px;
  background-color: var(--color-bg-card);
  border-bottom: 1px solid var(--color-border);
}

.conduct-row:last-child {
  border-bottom: none;
}

.conduct-head {
  background-color: #1a1e35;
  font-weight: 600;
}

.conduct-head .conduct-col {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--color-neon-cyan);
}

.conduct-col {
  font-size: 0.9rem;
  color: var(--color-text-dim);
  line-height: 1.6;
}

.conduct-note {
  font-size: 0.9rem;
  color: var(--color-text-dim);
}

.conduct-note a {
  font-family: var(--font-mono);
  color: var(--color-neon-cyan);
  border-bottom: 1px dashed transparent;
}

.conduct-note a:hover {
  color: var(--color-neon-amber);
  border-bottom-color: var(--color-neon-amber);
}

/* 反馈渠道 */
.feedback-channel {
  margin-bottom: 48px;
}

.feedback-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin: 16px 0;
}

.feedback-list li {
  font-size: 0.92rem;
  color: var(--color-text-dim);
  padding-left: 20px;
  position: relative;
}

.feedback-list li::before {
  content: "▸";
  position: absolute;
  left: 0;
  color: var(--color-neon-red);
}

.feedback-list a {
  font-family: var(--font-mono);
  color: var(--color-neon-cyan);
  border-bottom: 1px dashed transparent;
}

.feedback-list a:hover {
  color: var(--color-neon-amber);
  border-bottom-color: var(--color-neon-amber);
}

.feedback-note {
  font-size: 0.9rem;
  color: var(--color-text-dim);
}

/* 规则页总结 */
.rule-footer {
  margin-bottom: 48px;
}

.rule-footer-box {
  background-color: var(--color-bg-card);
  border: 2px dashed var(--color-neon-amber);
  border-radius: var(--radius-card);
  padding: 28px;
  text-align: center;
}

.rule-footer-box p {
  font-size: 1rem;
  color: var(--color-text-dim);
  margin-bottom: 16px;
}

.rule-footer-box strong {
  color: var(--color-neon-amber);
  font-family: var(--font-mono);
}

.rule-footer-link {
  display: inline-block;
  padding: 10px 24px;
  font-family: var(--font-mono);
  font-size: 0.92rem;
  color: var(--color-neon-cyan);
  border: 2px solid var(--color-neon-cyan);
  border-radius: var(--radius-btn);
  transition: all var(--transition-fast);
}

.rule-footer-link:hover {
  background-color: rgba(0, 217, 192, 0.1);
  color: var(--color-neon-amber);
  border-color: var(--color-neon-amber);
}

/* --------------------------------------------------------------------------
   404 Page / 错误页
   -------------------------------------------------------------------------- */
.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
  padding: 48px 24px;
}

.error-section {
  text-align: center;
  max-width: 600px;
  width: 100%;
}

.error-code {
  font-family: var(--font-mono);
  font-size: 4rem;
  font-weight: 700;
  color: var(--color-neon-red);
  text-shadow: 3px 3px 0 rgba(255, 77, 109, 0.3);
  margin-bottom: 8px;
  line-height: 1;
}

.error-title {
  font-size: 1.5rem;
  color: var(--color-text);
  margin-bottom: 16px;
}

.error-desc {
  font-size: 1rem;
  color: var(--color-text-dim);
  margin-bottom: 28px;
}

.error-actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 32px;
}

.error-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 10px 20px;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--color-neon-cyan);
  border: 2px solid var(--color-border-pixel);
  border-radius: var(--radius-btn);
  transition: all var(--transition-fast);
}

.error-link:hover {
  color: var(--color-neon-amber);
  border-color: var(--color-neon-amber);
}

.error-help {
  font-size: 0.92rem;
  color: var(--color-text-dim);
}

.error-help a {
  font-family: var(--font-mono);
  color: var(--color-neon-cyan);
  border-bottom: 1px dashed transparent;
  margin: 0 4px;
}

.error-help a:hover {
  color: var(--color-neon-amber);
  border-bottom-color: var(--color-neon-amber);
}

/* --------------------------------------------------------------------------
   Responsive / 响应式
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
  .hero-content {
    grid-template-columns: 1fr;
    gap: 32px;
    padding: 48px 24px 40px;
  }

  .hero-figure img {
    height: 280px;
  }

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

  .filter-sidebar {
    position: static;
  }

  .filter-list {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 8px;
  }

  .filter-list li {
    margin: 0;
  }

  .filter-tag {
    padding: 8px 14px;
  }

  .channel-card {
    grid-template-columns: 160px 1fr;
  }

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

  .scope-figure img {
    height: 200px;
  }
}

@media (max-width: 768px) {
  .header-inner {
    padding: 0 16px;
  }

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background-color: var(--color-bg);
    border-bottom: 2px solid var(--color-border-pixel);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.4);
  }

  .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px 16px;
  }

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

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

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

  .nav-list li + li::before {
    display: none;
  }

  .nav-list a {
    display: block;
    padding: 14px 12px;
    font-size: 1rem;
    border-radius: 0;
    border: none;
  }

  .nav-list a.is-current {
    background-color: transparent;
    border: none;
  }

  .inner-main {
    padding: 0 16px 48px;
  }

  h1 {
    font-size: 1.4rem;
  }

  .page-title {
    font-size: 1.4rem;
  }

  .hero-content {
    padding: 40px 16px 32px;
  }

  .hero-title {
    font-size: 1.6rem;
  }

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

  .card-grid,
  .step-flow,
  .device-list,
  .network-list,
  .rule-list,
  .principle-grid {
    grid-template-columns: 1fr;
  }

  .collection-preview,
  .guide-entry,
  .misconception-preview,
  .boundary-statement,
  .channel-tags {
    padding-left: 16px;
    padding-right: 16px;
  }

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

  .channel-media img {
    height: 180px;
  }

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

  .misconception-col {
    padding-bottom: 12px;
    border-bottom: 1px dashed var(--color-border);
  }

  .misconception-col:last-child {
    padding-bottom: 0;
    border-bottom: none;
  }

  .conduct-row {
    grid-template-columns: 1fr;
    gap: 6px;
    padding: 12px 16px;
  }

  .conduct-head {
    display: none;
  }

  .footer-inner {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    padding: 32px 16px 24px;
  }

  .footer-bottom {
    padding: 16px;
  }

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

  .step-number {
    width: 40px;
    height: 40px;
    font-size: 1.2rem;
  }

  .filter-toolbar {
    padding: 12px 16px;
  }

  .scope-media {
    padding: 16px;
  }
}

@media (max-width: 480px) {
  .brand-name {
    font-size: 1.1rem;
    padding: 3px 8px;
  }

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

  .btn-primary,
  .btn-secondary {
    width: 100%;
  }

  .tag-list {
    gap: 8px;
  }

  .tag-item {
    padding: 10px 14px;
    font-size: 0.88rem;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .filter-toolbar {
    flex-direction: column;
    align-items: flex-start;
  }

  .filter-label {
    margin-bottom: 4px;
  }

  .error-code {
    font-size: 3rem;
  }

  .error-title {
    font-size: 1.2rem;
  }

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

  .error-link {
    justify-content: center;
  }
}