/* ==========================================================================
   可乐影视 · 全站样式表
   高对比无障碍风 · 深浅明暗界限清晰 · 焦点突出
   ========================================================================== */

/* ==========================================================================
   Base — 基础重置、字体、颜色、变量
   ========================================================================== */

:root {
  --color-primary: #1a1a2e;
  --color-text: #ffffff;
  --color-bg-light: #f5f5f7;
  --color-accent: #e94560;
  --color-card-dark: #16213e;
  --color-secondary-dark: #0f3460;
  --color-text-dark: #1a1a2e;
  --color-muted: #6b7280;
  --color-border: #e5e7eb;
  --color-link: #0f3460;
  --color-link-hover: #e94560;
  --color-link-underline: rgba(15, 52, 96, 0.3);
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-size-base: 16px;
  --line-height-base: 1.8;
  --container-width: 1200px;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --shadow-card: 0 2px 8px rgba(0, 0, 0, 0.08);
  --shadow-card-hover: 0 6px 20px rgba(0, 0, 0, 0.12);
  --transition-base: 0.25s ease;
}

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

html {
  font-size: var(--font-size-base);
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  color: var(--color-text);
  background-color: var(--color-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: var(--color-link);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: var(--color-link-underline);
  transition: color var(--transition-base), text-decoration-color var(--transition-base);
}

a:hover {
  color: var(--color-link-hover);
  text-decoration-color: var(--color-link-hover);
}

ul,
ol {
  list-style: none;
}

h1,
h2,
h3,
h4 {
  line-height: 1.3;
  font-weight: 700;
  color: var(--color-text);
}

h1 {
  font-size: 32px;
}

h2 {
  font-size: 24px;
}

h3 {
  font-size: 20px;
}

p {
  color: var(--color-text);
}

strong {
  font-weight: 700;
}

/* ==========================================================================
   Layout — 全站骨架：页头、页脚、主容器、面包屑
   ========================================================================== */

/* 站点主体：所有页面统一背景与文字 */
.site-body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--color-primary);
  color: var(--color-text);
}

/* 页头 */
.site-header {
  background-color: var(--color-primary);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
  min-height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

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

.brand-link:hover {
  color: var(--color-text);
  text-decoration: none;
}

.brand-name {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 0.5px;
  color: var(--color-text);
}

/* 主导航 */
.site-nav {
  display: flex;
  align-items: center;
}

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

.nav-list li {
  margin: 0;
}

.nav-list a {
  display: block;
  padding: 8px 14px;
  font-size: 15px;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.85);
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition: color var(--transition-base), background-color var(--transition-base);
}

.nav-list a:hover {
  color: var(--color-text);
  background-color: rgba(255, 255, 255, 0.08);
  text-decoration: none;
}

.nav-list a.is-current {
  color: var(--color-text);
  background-color: rgba(233, 69, 96, 0.2);
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-color: var(--color-accent);
}

/* 移动端汉堡按钮（默认隐藏） */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  flex-direction: column;
  gap: 5px;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  min-height: 44px;
}

.nav-toggle-bar {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--color-text);
  transition: transform var(--transition-base), opacity var(--transition-base);
}

/* 主内容 */
.site-main {
  flex: 1;
  width: 100%;
}

/* 内页主容器 */
.inner-main {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 32px 24px 64px;
  width: 100%;
  flex: 1;
}

/* 面包屑 */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 24px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
}

.breadcrumb a {
  color: rgba(255, 255, 255, 0.75);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: rgba(255, 255, 255, 0.3);
}

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

.breadcrumb-sep {
  color: rgba(255, 255, 255, 0.35);
  user-select: none;
}

.breadcrumb-current {
  color: rgba(255, 255, 255, 0.55);
}

/* 页面标题区 */
.page-header {
  margin-bottom: 40px;
  padding-bottom: 24px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

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

.page-description {
  font-size: 16px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.75);
  max-width: 720px;
}

/* 通用区块标题 */
.section-title {
  font-size: 24px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 20px;
}

/* 页脚 */
.site-footer {
  background-color: var(--color-secondary-dark);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  margin-top: auto;
}

.footer-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px 24px 24px;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px;
}

.footer-col h3 {
  font-size: 15px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 16px;
  letter-spacing: 0.3px;
}

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

.footer-col ul a {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
}

.footer-col ul a:hover {
  color: var(--color-accent);
  text-decoration: underline;
}

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

.footer-tagline {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
  line-height: 1.7;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 20px 24px;
  text-align: center;
}

.footer-bottom p {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
}

/* 内页通用双栏布局（主内容在前、侧栏在后） */
.page-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  gap: 40px;
  align-items: start;
}

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

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

/* 侧栏通用样式 */
.sidebar-inner,
.sidebar-box,
.trend-panel {
  background-color: var(--color-card-dark);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-lg);
  padding: 24px;
  position: sticky;
  top: 88px;
}

.sidebar-title,
.sidebar-inner h2,
.sidebar-box h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar-desc {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.65);
  margin-bottom: 16px;
  line-height: 1.7;
}

.sidebar-nav li,
.sidebar-links li {
  margin-bottom: 8px;
}

.sidebar-nav a,
.sidebar-links a {
  display: block;
  padding: 8px 12px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
  border-radius: var(--radius-sm);
  border-left: 3px solid transparent;
  transition: background-color var(--transition-base), color var(--transition-base), border-color var(--transition-base);
}

.sidebar-nav a:hover,
.sidebar-links a:hover {
  color: var(--color-text);
  background-color: rgba(255, 255, 255, 0.06);
  border-left-color: var(--color-accent);
  text-decoration: none;
}

.sidebar-note {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.55);
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  line-height: 1.7;
}

.sidebar-note a {
  color: var(--color-accent);
  text-decoration: underline;
}

/* ==========================================================================
   Components — 复用组件：卡片、步骤、折叠、图片容器
   ========================================================================== */

/* 频道卡片（首页网格） */
.channel-card {
  background-color: var(--color-card-dark);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
}

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

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

.channel-card h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-text);
  padding: 16px 16px 4px;
}

.channel-card p {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.7);
  padding: 0 16px 20px;
  flex: 1;
}

/* 专题卡片（首页横滑 + 内页网格共用基础） */
.feature-card {
  background-color: var(--color-card-dark);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
}

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

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

.feature-card h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--color-text);
  padding: 14px 16px 4px;
}

.feature-card p {
  font-size: 14px;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.7);
  padding: 0 16px;
  flex: 1;
}

.feature-count {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-accent);
  padding: 0 16px 16px;
}

/* 首页步骤条 */
.guide-step {
  background-color: var(--color-card-dark);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: transform var(--transition-base), border-color var(--transition-base);
}

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

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: var(--color-accent);
  color: var(--color-text);
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 14px;
}

.guide-step h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 8px;
}

.guide-step p {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.7);
}

/* 折叠问答 */
.faq-item {
  background-color: var(--color-card-dark);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  overflow: hidden;
}

.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 20px;
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text);
  cursor: pointer;
  list-style: none;
  transition: background-color var(--transition-base);
}

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

.faq-item summary::after {
  content: "+";
  font-size: 22px;
  font-weight: 400;
  color: var(--color-accent);
  transition: transform var(--transition-base);
  flex-shrink: 0;
  margin-left: 16px;
}

.faq-item[open] summary {
  background-color: rgba(233, 69, 96, 0.08);
}

.faq-item[open] summary::after {
  content: "−";
}

.faq-item summary:hover {
  background-color: rgba(255, 255, 255, 0.04);
}

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

.faq-answer p {
  font-size: 15px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.78);
}

/* 首页各区通用 */
.section-block {
  padding: 64px 0;
}

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

.section-header h2 {
  font-size: 26px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 10px;
}

.section-header p {
  font-size: 15px;
  color: rgba(255, 255, 255, 0.7);
  max-width: 640px;
}

.section-link {
  margin-top: 28px;
}

.section-link a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.section-link a:hover {
  color: var(--color-text);
}

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

.home-main {
  width: 100%;
}

/* 首屏焦点区 */
.hero-section {
  background-color: var(--color-primary);
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 64px 24px 72px;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}

.hero-content h1 {
  font-size: 36px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 16px;
  line-height: 1.3;
}

.hero-slogan {
  font-size: 20px;
  font-weight: 600;
  color: var(--color-accent);
  margin-bottom: 16px;
  line-height: 1.5;
}

.hero-text {
  font-size: 16px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 28px;
  max-width: 520px;
}

.hero-cta {
  display: inline-block;
  padding: 14px 32px;
  background-color: var(--color-accent);
  color: var(--color-text);
  font-size: 16px;
  font-weight: 700;
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: background-color var(--transition-base), transform var(--transition-base);
}

.hero-cta:hover {
  background-color: #d63851;
  color: var(--color-text);
  text-decoration: none;
  transform: translateY(-2px);
}

.hero-figure {
  margin: 0;
}

.hero-figure img {
  width: 100%;
  height: 360px;
  object-fit: cover;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

/* 频道分类总览 */
.channels-overview {
  background-color: var(--color-bg-light);
  color: var(--color-text-dark);
}

.channels-overview .section-header h2 {
  color: var(--color-text-dark);
}

.channels-overview .section-header p {
  color: #4b5563;
}

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

.channels-overview .channel-card {
  background-color: var(--color-text);
  border: 1px solid var(--color-border);
}

.channels-overview .channel-card h3 {
  color: var(--color-text-dark);
}

.channels-overview .channel-card p {
  color: #4b5563;
}

.channels-overview .channel-card:hover {
  border-color: var(--color-accent);
}

.channels-overview .section-link a {
  color: var(--color-link);
}

/* 热门专题推荐 */
.features-preview {
  background-color: var(--color-primary);
}

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

/* 观看指南入口 */
.guide-teaser {
  background-color: var(--color-bg-light);
  color: var(--color-text-dark);
}

.guide-teaser .section-header h2 {
  color: var(--color-text-dark);
}

.guide-teaser .section-header p {
  color: #4b5563;
}

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

.guide-teaser .guide-step {
  background-color: var(--color-text);
  border: 1px solid var(--color-border);
}

.guide-teaser .guide-step h3 {
  color: var(--color-text-dark);
}

.guide-teaser .guide-step p {
  color: #4b5563;
}

.guide-teaser .guide-step:hover {
  border-color: var(--color-accent);
}

.guide-teaser .section-link a {
  color: var(--color-link);
}

/* 热门问答 */
.faq-preview {
  background-color: var(--color-primary);
}

.faq-preview .faq-item {
  max-width: 800px;
}

/* 内容定位说明 */
.positioning-note {
  background-color: var(--color-bg-light);
  color: var(--color-text-dark);
}

.positioning-note h2 {
  font-size: 24px;
  font-weight: 700;
  color: var(--color-text-dark);
  margin-bottom: 16px;
}

.positioning-note p {
  font-size: 15px;
  line-height: 1.8;
  color: #4b5563;
  max-width: 760px;
  margin-bottom: 12px;
}

/* ==========================================================================
   Pages — 频道分类（klys/channels.html）
   ========================================================================== */

/* 左侧目录 + 右侧详情 */
.page-layout.sidebar-left {
  grid-template-columns: 260px minmax(0, 1fr);
}

/* 左侧目录 */
.channel-index {
  background-color: var(--color-card-dark);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-lg);
  padding: 24px;
  position: sticky;
  top: 88px;
}

.channel-index h2 {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.index-list li {
  margin-bottom: 6px;
}

.index-list a {
  display: block;
  padding: 8px 12px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
  border-radius: var(--radius-sm);
  border-left: 3px solid transparent;
  transition: background-color var(--transition-base), color var(--transition-base), border-color var(--transition-base);
}

.index-list a:hover {
  color: var(--color-text);
  background-color: rgba(255, 255, 255, 0.06);
  border-left-color: var(--color-accent);
  text-decoration: none;
}

/* 右侧详情 */
.channel-detail-list {
  min-width: 0;
}

.channel-block {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 32px;
  align-items: center;
  padding: 32px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  scroll-margin-top: 88px;
}

.channel-block:last-of-type {
  border-bottom: none;
}

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

.channel-desc {
  font-size: 15px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.75);
  margin-bottom: 16px;
}

.channel-attr {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.channel-attr strong {
  display: inline-block;
  font-size: 14px;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.85);
  background-color: rgba(255, 255, 255, 0.06);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--color-accent);
}

.channel-media {
  margin: 0;
}

.channel-media img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

/* 相关链接 */
.related-links {
  margin-top: 32px;
  padding: 24px;
  background-color: var(--color-card-dark);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.related-links p {
  font-size: 15px;
  color: rgba(255, 255, 255, 0.8);
  line-height: 1.8;
}

.related-links a {
  color: var(--color-accent);
  font-weight: 600;
}

/* ==========================================================================
   Pages — 专题推荐（klys/features.html）
   ========================================================================== */

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

.feature-media {
  margin: 0;
}

.feature-media img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.feature-body {
  padding: 0 20px 20px;
}

.feature-body h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 8px;
}

.feature-body p {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 12px;
}

.feature-body .feature-count {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-accent);
  padding: 0;
}

/* 专题频道说明 */
.feature-channel-note {
  margin-top: 40px;
  padding: 28px;
  background-color: var(--color-card-dark);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.feature-channel-note p {
  font-size: 15px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.78);
}

.feature-channel-note a {
  color: var(--color-accent);
  font-weight: 600;
}

/* 题材风向标签 */
.trend-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.trend-tags li {
  margin: 0;
}

.trend-tags a {
  display: inline-block;
  padding: 6px 14px;
  font-size: 14px;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.85);
  background-color: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 999px;
  text-decoration: none;
  transition: background-color var(--transition-base), color var(--transition-base), border-color var(--transition-base);
}

.trend-tags a:hover {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-text);
}

/* ==========================================================================
   Pages — 观看指南（klys/guide.html）
   ========================================================================== */

/* 步骤导航侧栏 */
.sidebar-right .sidebar-inner {
  position: sticky;
  top: 88px;
}

/* 步骤列表 */
.guide-steps {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.guide-steps .step-item {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  gap: 20px;
  padding: 28px;
  background-color: var(--color-card-dark);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-lg);
  scroll-margin-top: 88px;
}

.guide-steps .step-number {
  width: 48px;
  height: 48px;
  font-size: 20px;
  margin-bottom: 0;
}

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

.step-body h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 10px;
}

.step-body p {
  font-size: 15px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.75);
  margin-bottom: 16px;
}

.step-figure {
  margin: 12px 0 0;
}

.step-figure img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  border-radius: var(--radius-md);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

/* 入口核验 */
.guide-check {
  margin-top: 48px;
  padding: 32px;
  background-color: var(--color-card-dark);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-lg);
}

.section-intro {
  font-size: 15px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.75);
  margin-bottom: 24px;
}

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

.check-item {
  background-color: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  padding: 20px;
}

.check-item h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 8px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--color-accent);
}

.check-item p {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.7);
}

/* ==========================================================================
   Pages — 常见问题（klys/faq.html）
   ========================================================================== */

.layout-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  gap: 40px;
  align-items: start;
}

/* 问题目录 */
.faq-toc {
  background-color: var(--color-card-dark);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 32px;
}

.toc-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px 16px;
}

.toc-list li {
  margin: 0;
}

.toc-list a {
  display: block;
  padding: 8px 12px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
  border-radius: var(--radius-sm);
  border-left: 3px solid transparent;
  transition: background-color var(--transition-base), color var(--transition-base), border-color var(--transition-base);
}

.toc-list a:hover {
  color: var(--color-text);
  background-color: rgba(255, 255, 255, 0.06);
  border-left-color: var(--color-accent);
  text-decoration: none;
}

/* 问答列表 */
.faq-list {
  margin-bottom: 40px;
}

.faq-list .faq-item {
  scroll-margin-top: 88px;
}

/* 插图说明 */
.faq-illustration {
  margin-top: 40px;
}

.faq-figure {
  margin: 0;
}

.faq-figure img {
  width: 100%;
  height: 240px;
  object-fit: cover;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.faq-figure figcaption {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
  margin-top: 12px;
  line-height: 1.7;
}

/* ==========================================================================
   Pages — 关于我们（klys/about.html）
   ========================================================================== */

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

.about-section {
  margin-bottom: 40px;
  padding-bottom: 32px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.about-section:last-of-type {
  border-bottom: none;
}

.about-section h2 {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 16px;
}

.about-section p {
  font-size: 15px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.78);
  margin-bottom: 12px;
  max-width: 720px;
}

.about-section a {
  color: var(--color-accent);
  font-weight: 600;
}

.about-figure {
  margin: 32px 0;
}

.about-figure img {
  width: 100%;
  height: 260px;
  object-fit: cover;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.about-figure figcaption {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
  margin-top: 12px;
}

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

.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 80px 24px;
  min-height: 60vh;
}

.error-panel {
  text-align: center;
  max-width: 560px;
}

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

.error-panel h1 {
  font-size: 28px;
  margin-bottom: 16px;
}

.error-desc {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 32px;
  line-height: 1.8;
}

.btn-back {
  display: inline-block;
  padding: 14px 32px;
  background-color: var(--color-accent);
  color: var(--color-text);
  font-size: 16px;
  font-weight: 700;
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: background-color var(--transition-base), transform var(--transition-base);
}

.btn-back:hover {
  background-color: #d63851;
  color: var(--color-text);
  text-decoration: none;
  transform: translateY(-2px);
}

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

/* 平板：≤ 1024px */
@media (max-width: 1024px) {
  .header-inner {
    padding: 0 20px;
  }

  .inner-main {
    padding: 28px 20px 48px;
  }

  .hero-section {
    padding: 48px 20px 56px;
    gap: 32px;
  }

  .hero-content h1 {
    font-size: 32px;
  }

  .hero-figure img {
    height: 300px;
  }

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

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

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

  .page-layout {
    grid-template-columns: minmax(0, 1fr) 240px;
    gap: 32px;
  }

  .page-layout.sidebar-left {
    grid-template-columns: 220px minmax(0, 1fr);
    gap: 32px;
  }

  .layout-shell {
    grid-template-columns: minmax(0, 1fr) 240px;
    gap: 32px;
  }

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

  .channel-media img {
    height: 220px;
  }

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

/* 手机：≤ 768px */
@media (max-width: 768px) {
  .header-inner {
    padding: 0 16px;
    min-height: 56px;
  }

  .brand-name {
    font-size: 20px;
  }

  /* 显示汉堡按钮 */
  .nav-toggle {
    display: flex;
  }

  /* 导航列表默认收起 */
  .nav-list {
    display: none;
    position: absolute;
    top: 56px;
    left: 0;
    right: 0;
    background-color: var(--color-primary);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    flex-direction: column;
    align-items: stretch;
    padding: 8px 16px 16px;
    gap: 2px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
  }

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

  .nav-list a {
    padding: 12px 16px;
    font-size: 16px;
    border-radius: var(--radius-sm);
  }

  .site-nav {
    position: static;
  }

  .inner-main {
    padding: 24px 16px 40px;
  }

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

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

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

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

  /* 首页 */
  .hero-section {
    grid-template-columns: 1fr;
    padding: 40px 16px 48px;
    gap: 24px;
  }

  .hero-content h1 {
    font-size: 28px;
  }

  .hero-slogan {
    font-size: 17px;
  }

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

  .section-block {
    padding: 40px 0;
  }

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

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

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

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

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 32px 16px 16px;
  }

  /* 内页双栏全部改为单列 */
  .page-layout {
    grid-template-columns: 1fr;
    gap: 24px;
  }

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

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

  /* 频道页：详情在前，目录在后 */
  .page-layout.sidebar-left .channel-index {
    order: 2;
    position: static;
  }

  .page-layout.sidebar-left .channel-detail-list {
    order: 1;
  }

  .channel-index {
    position: static;
    margin-top: 8px;
  }

  .channel-block {
    padding: 24px 0;
  }

  .channel-text h2 {
    font-size: 20px;
  }

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

  /* 专题页 */
  .feature-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .trend-panel {
    position: static;
    margin-top: 8px;
  }

  /* 指南页 */
  .guide-steps .step-item {
    grid-template-columns: 1fr;
    gap: 12px;
    padding: 20px;
  }

  .guide-steps .step-number {
    margin-bottom: 4px;
  }

  .step-figure img {
    height: 160px;
  }

  .guide-check {
    padding: 24px 20px;
  }

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

  .sidebar-right .sidebar-inner {
    position: static;
    margin-top: 8px;
  }

  /* FAQ 页 */
  .toc-list {
    grid-template-columns: 1fr;
  }

  .faq-toc {
    padding: 20px;
  }

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

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

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

  .sidebar-box {
    position: static;
    margin-top: 8px;
  }

  /* 关于页 */
  .about-section {
    margin-bottom: 28px;
    padding-bottom: 24px;
  }

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

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

  .sidebar-about .sidebar-inner {
    position: static;
    margin-top: 8px;
  }

  /* 404 */
  .error-main {
    padding: 48px 16px;
    min-height: 50vh;
  }

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

  .error-panel h1 {
    font-size: 24px;
  }
}

/* 小屏手机：≤ 390px */
@media (max-width: 390px) {
  .header-inner {
    padding: 0 12px;
  }

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

  .inner-main {
    padding: 20px 12px 32px;
  }

  .hero-section {
    padding: 32px 12px 40px;
  }

  .hero-content h1 {
    font-size: 24px;
  }

  .hero-cta {
    display: block;
    text-align: center;
  }

  .channel-card img {
    height: 160px;
  }

  .feature-card img {
    height: 150px;
  }

  .channel-media img {
    height: 160px;
  }

  .step-figure img {
    height: 140px;
  }

  .faq-figure img {
    height: 160px;
  }

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

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