/* ==========================================================================
   鸡腿云 (jituiyun.lat) 侘寂极简设计系统 (Wabi-Sabi Minimalism)
   质朴自然 · 粗砺温润 · 留白克制 · 极致流畅
   ========================================================================== */

:root {
  /* 侘寂大地色谱 */
  --color-bg: #FAF7F2;
  --color-bg-subtle: #F2ECE3;
  --color-bg-surface: #FFFFFF;
  --color-bg-elevated: #FDFBF8;
  --color-bg-tertiary: #E8E0D5;

  --color-text-main: #23201C;
  --color-text-body: #4F473E;
  --color-text-muted: #82786C;
  --color-text-faint: #ABA094;

  --color-border: #E4DDD2;
  --color-border-dark: #CFC5B8;
  
  /* 质朴点缀色：古陶赤茶与松苔青 */
  --color-accent: #BC5E33;
  --color-accent-hover: #A34E26;
  --color-accent-subtle: #F6EDE7;
  --color-accent-sage: #536756;
  --color-accent-amber: #BA8540;

  /* 阴影：自然漫反射光 */
  --shadow-sm: 0 2px 8px rgba(35, 32, 28, 0.04);
  --shadow-md: 0 6px 20px rgba(35, 32, 28, 0.06);
  --shadow-lg: 0 16px 36px rgba(35, 32, 28, 0.08);

  /* 字体与排版 */
  --font-heading: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Arial Rounded MT Bold", sans-serif;
  --font-body: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Courier New", monospace;

  /* 间距与圆角 */
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-pill: 9999px;
  --radius-organic: 26px 20px 24px 22px;

  --max-width: 1200px;
  --max-width-narrow: 840px;
  --header-height: 72px;

  --transition-fast: 0.18s cubic-bezier(0.2, 0.8, 0.2, 1);
  --transition-normal: 0.28s cubic-bezier(0.2, 0.8, 0.2, 1);
}

/* 基础重置 */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-body);
  background-color: var(--color-bg);
  color: var(--color-text-body);
  line-height: 1.7;
  overflow-x: hidden;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  position: relative;
  background-image: radial-gradient(var(--color-border) 0.75px, transparent 0.75px);
  background-size: 24px 24px;
}

/* 减弱动画模式 */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* 链接与交互焦点 */
a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast), opacity var(--transition-fast);
}

a:focus-visible, button:focus-visible, summary:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}

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

/* 粗圆标题层级 */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--color-text-main);
  line-height: 1.35;
  font-weight: 800;
  letter-spacing: -0.01em;
}

h1 { font-size: clamp(2rem, 4vw + 1rem, 3.25rem); }
h2 { font-size: clamp(1.6rem, 2.5vw + 0.8rem, 2.4rem); }
h3 { font-size: clamp(1.25rem, 1.5vw + 0.5rem, 1.6rem); }
h4 { font-size: 1.15rem; }

p {
  margin-bottom: 1.25rem;
}
p:last-child {
  margin-bottom: 0;
}

/* 通用容器 */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

.container-narrow {
  max-width: var(--max-width-narrow);
}

/* 按钮规范 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 700;
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--transition-normal);
  text-align: center;
}

.btn-primary {
  background-color: var(--color-accent);
  color: #FFFFFF;
  box-shadow: 0 4px 14px rgba(188, 94, 51, 0.28);
}
.btn-primary:hover {
  background-color: var(--color-accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(188, 94, 51, 0.36);
  color: #FFFFFF;
}
.btn-primary:active {
  transform: translateY(0);
}

.btn-secondary {
  background-color: var(--color-bg-surface);
  color: var(--color-text-main);
  border-color: var(--color-border);
}
.btn-secondary:hover {
  background-color: var(--color-bg-subtle);
  border-color: var(--color-border-dark);
  transform: translateY(-2px);
}

.btn-sm {
  padding: 0.5rem 1.15rem;
  font-size: 0.85rem;
}
.btn-lg {
  padding: 0.95rem 2.25rem;
  font-size: 1.05rem;
}

/* 标签徽章 */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.85rem;
  font-size: 0.8rem;
  font-weight: 700;
  border-radius: var(--radius-pill);
  background-color: var(--color-bg-subtle);
  color: var(--color-text-body);
  border: 1px solid var(--color-border);
  letter-spacing: 0.02em;
}

.badge-accent {
  background-color: var(--color-accent-subtle);
  color: var(--color-accent);
  border-color: rgba(188, 94, 51, 0.2);
}

.badge-sage {
  background-color: #EEF3EF;
  color: var(--color-accent-sage);
  border-color: #D3DFD5;
}

/* ==========================================================================
   页眉 Header
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(250, 247, 242, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  transition: background-color var(--transition-fast), border-color var(--transition-fast);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--color-text-main);
  text-decoration: none;
}
.brand-logo img, .brand-logo svg {
  height: 42px;
  width: auto;
}

.nav-desktop {
  display: flex;
  align-items: center;
  gap: 1.75rem;
  list-style: none;
}

.nav-desktop a {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-text-body);
  padding: 0.4rem 0.2rem;
  position: relative;
}

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

.nav-desktop a::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background-color: var(--color-accent);
  transition: width var(--transition-fast);
  border-radius: 2px;
}
.nav-desktop a:hover::after, .nav-desktop a.active::after {
  width: 100%;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

/* 移动端汉堡菜单触发器 */
.mobile-nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 0.5rem;
  color: var(--color-text-main);
  cursor: pointer;
}

.mobile-nav-toggle svg {
  width: 24px;
  height: 24px;
}

/* 移动端抽屉导航 */
.mobile-nav-drawer {
  display: none;
  background-color: var(--color-bg-surface);
  border-bottom: 1px solid var(--color-border);
  padding: 1.25rem 1.5rem;
  box-shadow: var(--shadow-md);
}

.mobile-nav-drawer.open {
  display: block;
}

.mobile-nav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.mobile-nav-list a {
  font-size: 1.05rem;
  font-weight: 600;
  display: block;
  padding: 0.6rem 0;
  border-bottom: 1px dashed var(--color-border);
}

.mobile-nav-actions {
  margin-top: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

/* ==========================================================================
   首屏主视觉 (Hero)
   ========================================================================== */
.hero-section {
  padding: clamp(3rem, 6vw, 5.5rem) 0 clamp(2.5rem, 5vw, 4.5rem);
  position: relative;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 3.5rem;
  align-items: center;
}

.hero-content {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.hero-badge-wrap {
  margin-bottom: 1.25rem;
}

.hero-title {
  margin-bottom: 1.5rem;
  color: var(--color-text-main);
}
.hero-title .highlight {
  color: var(--color-accent);
  position: relative;
  display: inline-block;
}
.hero-title .highlight::after {
  content: "";
  position: absolute;
  bottom: 4px;
  left: 0;
  width: 100%;
  height: 8px;
  background-color: rgba(188, 94, 51, 0.18);
  z-index: -1;
  border-radius: 4px;
}

.hero-description {
  font-size: clamp(1.05rem, 1.2vw, 1.2rem);
  color: var(--color-text-body);
  line-height: 1.75;
  margin-bottom: 2rem;
  max-width: 600px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 2.5rem;
}

.hero-specs-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border);
  width: 100%;
}

.spec-item {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.88rem;
  color: var(--color-text-muted);
}
.spec-item svg {
  width: 18px;
  height: 18px;
  color: var(--color-accent-sage);
}

/* 侘寂动态卡片组合视觉 (Hero Visual) */
.hero-visual {
  position: relative;
}

.wabi-composition {
  position: relative;
  width: 100%;
  min-height: 380px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.wabi-main-card {
  width: 100%;
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-organic);
  padding: 2rem;
  box-shadow: var(--shadow-md);
  position: relative;
  z-index: 2;
  overflow: hidden;
}

.card-ambient-glow {
  position: absolute;
  top: -40px;
  right: -40px;
  width: 160px;
  height: 160px;
  background: radial-gradient(circle, rgba(188, 94, 51, 0.15) 0%, transparent 70%);
  pointer-events: none;
}

.wabi-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px dashed var(--color-border);
}

.card-title-group {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}
.pulse-dot {
  width: 10px;
  height: 10px;
  background-color: #2BA055;
  border-radius: 50%;
  box-shadow: 0 0 0 4px rgba(43, 160, 85, 0.2);
}

.route-monitor {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.route-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 1rem;
  background-color: var(--color-bg-subtle);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
}

.route-info {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.route-flag {
  font-size: 1.25rem;
}
.route-name {
  font-weight: 700;
  font-size: 0.92rem;
  color: var(--color-text-main);
}
.route-type {
  font-size: 0.78rem;
  color: var(--color-text-muted);
}
.route-ping {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--color-accent-sage);
}

/* 随形浮动卡片 */
.wabi-floating-card {
  position: absolute;
  background-color: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-lg);
  padding: 1rem 1.25rem;
  border-radius: var(--radius-md);
  z-index: 3;
}

.float-top {
  top: -24px;
  right: -20px;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.float-icon {
  width: 36px;
  height: 36px;
  background-color: var(--color-accent-subtle);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
}

.float-bottom {
  bottom: -22px;
  left: -20px;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* ==========================================================================
   通用章节结构 (Section Styles)
   ========================================================================== */
.section {
  padding: clamp(3.5rem, 6vw, 6rem) 0;
  border-top: 1px solid var(--color-border);
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto clamp(2.5rem, 4vw, 3.5rem);
}

.section-header .section-tag {
  margin-bottom: 0.85rem;
}

.section-header .section-title {
  margin-bottom: 0.85rem;
}

.section-header .section-intro {
  color: var(--color-text-muted);
  font-size: 1.05rem;
}

/* ==========================================================================
   核心优势卡片 (Features Grid)
   ========================================================================== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.75rem;
}

.feature-card {
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2.25rem 1.85rem;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
  display: flex;
  flex-direction: column;
  position: relative;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-border-dark);
}

.feature-icon-box {
  width: 52px;
  height: 52px;
  background-color: var(--color-bg-subtle);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
  color: var(--color-accent);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.feature-card:hover .feature-icon-box {
  background-color: var(--color-accent);
  color: #FFFFFF;
}

.feature-card h3 {
  font-size: 1.25rem;
  margin-bottom: 0.85rem;
}

.feature-card p {
  color: var(--color-text-body);
  font-size: 0.95rem;
  line-height: 1.65;
}

/* ==========================================================================
   流媒体与 AI 支持 (Streaming & AI)
   ========================================================================== */
.support-dual-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

.support-block {
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2.25rem;
}

.support-block-header {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  margin-bottom: 1rem;
}
.support-block-header h3 {
  font-size: 1.35rem;
}

.support-block-desc {
  color: var(--color-text-body);
  font-size: 0.95rem;
  margin-bottom: 1.5rem;
}

.service-icon-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.85rem;
}

.service-pill {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  background-color: var(--color-bg-subtle);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.service-pill-icon {
  width: 28px;
  height: 28px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 800;
  color: #FFF;
}

.icon-netflix { background-color: #E50914; }
.icon-youtube { background-color: #FF0000; }
.icon-disney { background-color: #113CCF; }
.icon-spotify { background-color: #1DB954; }
.icon-chatgpt { background-color: #10A37F; }
.icon-claude { background-color: #D97706; }
.icon-midjourney { background-color: #1F2937; }
.icon-copilot { background-color: #040d21; }

.service-pill-info {
  display: flex;
  flex-direction: column;
}
.service-name {
  font-weight: 700;
  font-size: 0.88rem;
  color: var(--color-text-main);
}
.service-state {
  font-size: 0.74rem;
  color: var(--color-text-muted);
}

.support-disclaimer {
  margin-top: 1.75rem;
  padding: 1rem 1.25rem;
  background-color: var(--color-bg-subtle);
  border-radius: var(--radius-md);
  border-left: 3px solid var(--color-accent-amber);
  font-size: 0.85rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ==========================================================================
   套餐对比与选购 (Pricing Table)
   ========================================================================== */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.75rem;
  align-items: stretch;
}

.pricing-card {
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2.25rem 1.85rem;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.pricing-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.pricing-card.popular {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-md);
  background-color: #FFFDF9;
}

.popular-badge {
  position: absolute;
  top: -12px;
  right: 24px;
  background-color: var(--color-accent);
  color: #FFFFFF;
  font-size: 0.75rem;
  font-weight: 800;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-pill);
}

.pricing-header {
  margin-bottom: 1.5rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px dashed var(--color-border);
}

.plan-name {
  font-size: 1.35rem;
  margin-bottom: 0.5rem;
}

.plan-desc {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.plan-price-wrap {
  display: flex;
  align-items: baseline;
  gap: 0.25rem;
  margin: 1.25rem 0;
}

.price-currency {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text-main);
}
.price-value {
  font-size: 2.75rem;
  font-weight: 900;
  font-family: var(--font-heading);
  color: var(--color-text-main);
  line-height: 1;
}
.price-cycle {
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

.plan-features-list {
  list-style: none;
  margin: 1.5rem 0 2rem;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  flex-grow: 1;
}

.plan-feature-item {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-size: 0.9rem;
  color: var(--color-text-body);
}
.plan-feature-item svg {
  width: 16px;
  height: 16px;
  color: var(--color-accent);
  flex-shrink: 0;
}

.pricing-card .btn {
  width: 100%;
}

/* ==========================================================================
   常见问题解答 (FAQ Accordion)
   ========================================================================== */
.faq-wrap {
  max-width: var(--max-width-narrow);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

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

.faq-item[open] {
  border-color: var(--color-border-dark);
}

.faq-question {
  padding: 1.25rem 1.5rem;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--color-text-main);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  user-select: none;
}
.faq-question::-webkit-details-marker {
  display: none;
}

.faq-icon {
  width: 20px;
  height: 20px;
  transition: transform var(--transition-fast);
  color: var(--color-text-muted);
}
.faq-item[open] .faq-icon {
  transform: rotate(180deg);
  color: var(--color-accent);
}

.faq-answer {
  padding: 0 1.5rem 1.5rem;
  color: var(--color-text-body);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* ==========================================================================
   页脚 Footer (Strict 4 Links requirement)
   ========================================================================== */
.site-footer {
  background-color: var(--color-bg-subtle);
  border-top: 1px solid var(--color-border);
  padding: 3.5rem 0 2.5rem;
  margin-top: auto;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 1.75rem;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
}

.footer-brand img {
  height: 38px;
}

.footer-brand p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  max-width: 480px;
}

/* 页脚严格四大独立入口链接 */
.footer-links {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 2rem;
  list-style: none;
  flex-wrap: wrap;
  padding: 1rem 0;
  border-top: 1px dashed var(--color-border);
  border-bottom: 1px dashed var(--color-border);
  width: 100%;
  max-width: 640px;
}

.footer-links a {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--color-text-body);
  padding: 0.4rem 0.6rem;
  border-radius: var(--radius-sm);
}

.footer-links a:hover {
  color: var(--color-accent);
  background-color: var(--color-bg-tertiary);
}

.footer-copyright {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

/* ==========================================================================
   右侧章节切换悬浮箭头 (Floating Section Navigator)
   ========================================================================== */
.section-nav-widget {
  position: fixed;
  right: 24px;
  bottom: 36px;
  z-index: 99;
  display: flex;
  flex-direction: column;
  gap: 6px;
  background-color: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  padding: 6px;
  box-shadow: var(--shadow-md);
  transition: opacity var(--transition-fast), transform var(--transition-fast);
}

.section-nav-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: none;
  background: transparent;
  color: var(--color-text-main);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background-color var(--transition-fast), color var(--transition-fast), opacity var(--transition-fast);
}

.section-nav-btn:hover:not(:disabled) {
  background-color: var(--color-bg-subtle);
  color: var(--color-accent);
}

.section-nav-btn:disabled {
  opacity: 0.3;
  cursor: not-allowed;
  pointer-events: none;
}

.section-nav-btn svg {
  width: 20px;
  height: 20px;
}

/* ==========================================================================
   知识科普文章专区与独立页面专用样式 (Article & Detail Pages)
   ========================================================================== */
.page-hero {
  padding: 3.5rem 0 2rem;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 2.5rem;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.88rem;
  color: var(--color-text-muted);
  margin-bottom: 1.25rem;
  flex-wrap: wrap;
}
.breadcrumb a:hover {
  color: var(--color-accent);
}
.breadcrumb-separator {
  color: var(--color-text-faint);
}

.article-header {
  margin-bottom: 2.5rem;
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  font-size: 0.88rem;
  color: var(--color-text-muted);
  margin-top: 1rem;
  flex-wrap: wrap;
}

.article-content {
  font-size: 1.05rem;
  line-height: 1.85;
  color: var(--color-text-body);
}

.article-content h2 {
  margin: 2.5rem 0 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px dashed var(--color-border);
}

.article-content h3 {
  margin: 2rem 0 0.85rem;
}

.article-content ul, .article-content ol {
  margin: 1.25rem 0 1.5rem 1.75rem;
}

.article-content li {
  margin-bottom: 0.5rem;
}

.article-content blockquote {
  margin: 1.75rem 0;
  padding: 1.25rem 1.5rem;
  background-color: var(--color-bg-subtle);
  border-left: 4px solid var(--color-accent);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  font-style: normal;
  color: var(--color-text-main);
}

.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 2rem 0;
  font-size: 0.92rem;
}

.article-content th, .article-content td {
  padding: 0.85rem 1rem;
  border: 1px solid var(--color-border);
  text-align: left;
}

.article-content th {
  background-color: var(--color-bg-subtle);
  font-family: var(--font-heading);
  font-weight: 700;
}

.article-content pre {
  background-color: #23201C;
  color: #EDE7DC;
  padding: 1.25rem 1.5rem;
  border-radius: var(--radius-md);
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  margin: 1.5rem 0;
  line-height: 1.6;
}

.article-content code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  background-color: var(--color-bg-subtle);
  padding: 0.2rem 0.4rem;
  border-radius: 4px;
  border: 1px solid var(--color-border);
}

.article-content pre code {
  background: transparent;
  padding: 0;
  border: none;
  color: inherit;
}

/* 文章中的推荐导流卡片 */
.article-promo-box {
  background-color: var(--color-accent-subtle);
  border: 1px solid rgba(188, 94, 51, 0.25);
  border-radius: var(--radius-lg);
  padding: 2rem;
  margin: 2.5rem 0;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  align-items: flex-start;
}

.article-promo-box h4 {
  font-size: 1.25rem;
  color: var(--color-accent-hover);
}

/* 文章网格与卡片 (Articles Directory) */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 2rem;
}

.article-card {
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.article-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-border-dark);
}

.article-card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.82rem;
  color: var(--color-text-muted);
  margin-bottom: 0.85rem;
}

.article-card-title {
  font-size: 1.2rem;
  margin-bottom: 0.85rem;
  line-height: 1.45;
}

.article-card-desc {
  font-size: 0.9rem;
  color: var(--color-text-body);
  margin-bottom: 1.5rem;
  flex-grow: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-card-link {
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--color-accent);
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

/* 网站地图目录列表 (HTML Sitemap Directory) */
.sitemap-section-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.sitemap-group {
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
}

.sitemap-group h3 {
  font-size: 1.25rem;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px dashed var(--color-border);
}

.sitemap-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.sitemap-links a {
  font-size: 0.95rem;
  color: var(--color-text-body);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}
.sitemap-links a:hover {
  color: var(--color-accent);
}

/* ==========================================================================
   响应式断点与适配 (Responsive Media Queries)
   ========================================================================== */
@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
  
  .support-dual-grid {
    grid-template-columns: 1fr;
  }

  .nav-desktop {
    display: none;
  }

  .mobile-nav-toggle {
    display: block;
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: 64px;
  }

  .container {
    padding-left: 1.15rem;
    padding-right: 1.15rem;
  }

  .hero-section {
    padding-top: 2rem;
  }

  .wabi-floating-card {
    position: static;
    margin-top: 1rem;
  }

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

  .section-nav-widget {
    right: 14px;
    bottom: 20px;
    padding: 4px;
  }
  
  .section-nav-btn {
    width: 36px;
    height: 36px;
  }

  .footer-links {
    gap: 1.25rem;
  }
}