/* ====================================================================
   速云梯 (suyunti.tattoo) — 核心样式表
   视觉风格：星际货运站 · 粗描边波普 · 杂志跨页双色印刷 (主色相 295°)
   版本：4.0 · 零外部依赖 · 响应式与高无障碍标准
   ==================================================================== */

:root {
  /* 基础色彩：295° 双色印刷油墨与星际货运站纸底 */
  --ink-black: #09090b;
  --ink-deep: #2e1065;
  --ink-purple: #701a75;
  --color-primary: #a21caf;
  --color-primary-light: #f472b6;
  --color-accent-neon: #d946ef;
  --color-accent-lime: #a3e635;
  --color-accent-lime-hover: #bef264;
  --bg-canvas: #fdf4ff;
  --bg-card: #ffffff;
  --bg-muted: #fae8ff;
  --border-width: 2.5px;
  --border-color: #09090b;
  --shadow-offset: 4px;
  --shadow-solid: 4px 4px 0 var(--border-color);
  --shadow-solid-sm: 2px 2px 0 var(--border-color);
  --shadow-solid-lg: 6px 6px 0 var(--border-color);
  --shadow-lime: 4px 4px 0 var(--color-accent-lime);

  /* 布局与间距 */
  --container-max: 1200px;
  --container-padding: 24px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-pill: 9999px;

  /* 字体栈 */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  
  /* 行高与尺寸 */
  --line-height-base: 1.68;
  --line-height-tight: 1.25;
}

/* 全局重置 */
*, *::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-sans);
  background-color: var(--bg-canvas);
  color: var(--ink-black);
  line-height: var(--line-height-base);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow-x: hidden;
  background-image: 
    radial-gradient(var(--ink-purple) 0.75px, transparent 0.75px),
    radial-gradient(var(--color-primary-light) 0.75px, var(--bg-canvas) 0.75px);
  background-size: 32px 32px;
  background-position: 0 0, 16px 16px;
}

/* 波普雪花与星尘氛围 */
.stardust-layer {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  opacity: 0.35;
  background: radial-gradient(circle at 15% 20%, rgba(217, 70, 239, 0.12) 0%, transparent 40%),
              radial-gradient(circle at 85% 80%, rgba(163, 230, 53, 0.1) 0%, transparent 40%);
}

/* 布局外壳 */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
  position: relative;
  z-index: 1;
}

/* 标题与文字排印（杂志跨页风格） */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-sans);
  color: var(--ink-black);
  line-height: var(--line-height-tight);
  font-weight: 800;
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(2rem, 4vw + 1rem, 3.25rem);
  margin-bottom: 1.25rem;
}

h2 {
  font-size: clamp(1.65rem, 2.5vw + 0.8rem, 2.4rem);
  margin-bottom: 1rem;
}

h3 {
  font-size: clamp(1.2rem, 1.5vw + 0.5rem, 1.5rem);
  margin-bottom: 0.75rem;
}

p {
  margin-bottom: 1.25rem;
  font-size: 1.05rem;
  color: #1f2937;
}

a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color 0.15s ease;
}

a:hover {
  color: var(--ink-deep);
}

/* 按钮通用（粗描边波普印刷） */
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 48px;
  padding: 0.75rem 1.75rem;
  font-size: 1.05rem;
  font-weight: 800;
  text-decoration: none;
  border-radius: var(--radius-sm);
  border: var(--border-width) solid var(--border-color);
  box-shadow: var(--shadow-solid);
  cursor: pointer;
  transition: transform 0.12s ease, box-shadow 0.12s ease, background-color 0.12s ease;
  user-select: none;
  text-align: center;
}

.button:hover {
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0 var(--border-color);
  text-decoration: none;
}

.button:active {
  transform: translate(2px, 2px);
  box-shadow: 2px 2px 0 var(--border-color);
}

.button-primary {
  background-color: var(--color-accent-lime);
  color: var(--ink-black);
}

.button-primary:hover {
  background-color: var(--color-accent-lime-hover);
  color: var(--ink-black);
}

.button-secondary {
  background-color: var(--bg-card);
  color: var(--ink-black);
}

.button-secondary:hover {
  background-color: var(--bg-muted);
}

.button-hero-accent {
  background-color: var(--color-accent-neon);
  color: #ffffff;
}

.button-hero-accent:hover {
  background-color: #c026d3;
  color: #ffffff;
}

/* 顶部徽标与杂志标签 */
.magazine-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.85rem;
  background-color: var(--bg-card);
  border: var(--border-width) solid var(--border-color);
  box-shadow: var(--shadow-solid-sm);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 1.25rem;
}

.badge-dot {
  width: 8px;
  height: 8px;
  background-color: var(--color-accent-lime);
  border-radius: 50%;
  border: 1.5px solid var(--border-color);
  animation: pulse-glow 2s infinite ease-in-out;
}

/* 站点页眉导航 */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(253, 244, 255, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: var(--border-width) solid var(--border-color);
  padding: 0.75rem 0;
}

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

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-size: 1.35rem;
  font-weight: 900;
  color: var(--ink-deep);
  text-decoration: none;
}

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

.brand-icon {
  width: 36px;
  height: 36px;
  background-color: var(--color-accent-lime);
  border: var(--border-width) solid var(--border-color);
  box-shadow: var(--shadow-solid-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
  font-size: 1.1rem;
  color: var(--ink-black);
}

.desktop-nav {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}

.nav-link {
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--ink-black);
  text-decoration: none;
  padding: 0.4rem 0.2rem;
  position: relative;
}

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

.nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background-color: var(--color-primary);
  transition: width 0.2s ease;
}

.nav-link:hover::after {
  width: 100%;
}

.header-cta {
  display: inline-flex;
}

.mobile-menu-toggle {
  display: none;
  background: var(--bg-card);
  border: var(--border-width) solid var(--border-color);
  box-shadow: var(--shadow-solid-sm);
  padding: 0.5rem 0.75rem;
  cursor: pointer;
  font-weight: 800;
  min-height: 44px;
  min-width: 44px;
}

/* 移动端抽屉菜单 */
.mobile-nav-panel {
  display: none;
  flex-direction: column;
  gap: 1rem;
  padding: 1.5rem;
  background-color: var(--bg-card);
  border-top: var(--border-width) solid var(--border-color);
  border-bottom: var(--border-width) solid var(--border-color);
  box-shadow: 0 8px 0 var(--border-color);
}

.mobile-nav-panel.is-active {
  display: flex;
}

.mobile-nav-panel .nav-link {
  font-size: 1.1rem;
  padding: 0.6rem 0;
  border-bottom: 1px dashed #e5e7eb;
}

/* Hero 首屏（3 痛点反问 + 货运站雷达跨页） */
.hero-section {
  padding: 4.5rem 0 3.5rem;
  border-bottom: var(--border-width) solid var(--border-color);
  position: relative;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 3rem;
  align-items: center;
}

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

.pain-inquiry-box {
  background: var(--bg-card);
  border: var(--border-width) solid var(--border-color);
  box-shadow: var(--shadow-solid);
  padding: 1.25rem 1.5rem;
  margin-bottom: 1.5rem;
  position: relative;
}

.pain-inquiry-title {
  font-size: 0.9rem;
  font-weight: 800;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.pain-inquiry-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.pain-inquiry-item {
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--ink-deep);
  line-height: 1.4;
}

.pain-bullet {
  color: var(--color-accent-neon);
  font-weight: 900;
}

.hero-subtitle {
  font-size: 1.15rem;
  line-height: 1.7;
  color: #374151;
  margin-bottom: 2rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  align-items: center;
}

.hero-stats {
  display: flex;
  gap: 1.5rem;
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 2px dashed #e9d5ff;
}

.stat-item {
  display: flex;
  flex-direction: column;
}

.stat-value {
  font-size: 1.4rem;
  font-weight: 900;
  color: var(--color-primary);
}

.stat-label {
  font-size: 0.85rem;
  color: #4b5563;
  font-weight: 600;
}

/* 货运站航道交互雷达卡片（招牌动效：节点连线点亮） */
.cargo-radar-card {
  background: var(--ink-deep);
  color: #ffffff;
  border: var(--border-width) solid var(--border-color);
  box-shadow: var(--shadow-solid-lg);
  padding: 1.75rem;
  border-radius: var(--radius-sm);
  position: relative;
  overflow: hidden;
}

.radar-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 2px solid rgba(255, 255, 255, 0.15);
  padding-bottom: 0.85rem;
  margin-bottom: 1.25rem;
}

.radar-status {
  font-size: 0.85rem;
  font-weight: 800;
  color: var(--color-accent-lime);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.radar-signal-light {
  width: 10px;
  height: 10px;
  background: var(--color-accent-lime);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--color-accent-lime);
}

.telemetry-route-map {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.route-node-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(255, 255, 255, 0.06);
  border: 1.5px solid rgba(255, 255, 255, 0.12);
  padding: 0.75rem 1rem;
  border-radius: 4px;
  position: relative;
  transition: all 0.3s ease;
}

.route-node-row.active {
  border-color: var(--color-accent-lime);
  background: rgba(163, 230, 53, 0.12);
}

.node-info {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.node-indicator {
  width: 12px;
  height: 12px;
  border: 2px solid #ffffff;
  border-radius: 50%;
  background: transparent;
  transition: background-color 0.3s ease, border-color 0.3s ease;
}

.route-node-row.active .node-indicator {
  background: var(--color-accent-lime);
  border-color: var(--color-accent-lime);
  box-shadow: 0 0 10px var(--color-accent-lime);
}

.node-name {
  font-weight: 700;
  font-size: 0.95rem;
  color: #f3f4f6;
}

.node-meta {
  font-size: 0.8rem;
  color: #9ca3af;
  font-family: var(--font-mono);
}

.node-ping {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 800;
  color: var(--color-accent-lime);
}

.cargo-radar-footer {
  font-size: 0.82rem;
  color: #d1d5db;
  line-height: 1.5;
  border-top: 1px dashed rgba(255, 255, 255, 0.2);
  padding-top: 0.85rem;
}

/* 核心特性模块（6 项，图文左右交错） */
.features-section {
  padding: 5rem 0;
  border-bottom: var(--border-width) solid var(--border-color);
}

.section-head {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 3.5rem;
}

.features-alternating-list {
  display: flex;
  flex-direction: column;
  gap: 3.5rem;
}

.feature-stagger-item {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.feature-stagger-item.reverse {
  direction: rtl;
}

.feature-stagger-item.reverse > * {
  direction: ltr;
}

.feature-visual {
  background: var(--bg-card);
  border: var(--border-width) solid var(--border-color);
  box-shadow: var(--shadow-solid);
  padding: 2rem;
  min-height: 240px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
}

.feature-badge-corner {
  position: absolute;
  top: 12px;
  right: 12px;
  background: var(--bg-muted);
  border: 1.5px solid var(--border-color);
  font-size: 0.75rem;
  font-weight: 800;
  padding: 0.2rem 0.5rem;
}

.feature-visual-icon {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.feature-text-block h3 {
  font-size: 1.6rem;
  color: var(--ink-deep);
  margin-bottom: 0.85rem;
}

.feature-text-block p {
  font-size: 1.05rem;
  color: #374151;
  line-height: 1.7;
}

/* AI 工具顺畅访问模块 */
.ai-acceleration-section {
  padding: 5rem 0;
  background-color: #faf5ff;
  border-bottom: var(--border-width) solid var(--border-color);
}

.ai-matrix-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.75rem;
  margin-top: 2.5rem;
}

.ai-card {
  background: var(--bg-card);
  border: var(--border-width) solid var(--border-color);
  box-shadow: var(--shadow-solid);
  padding: 1.75rem;
  transition: transform 0.15s ease;
}

.ai-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-solid-lg);
}

.ai-card-tag {
  display: inline-block;
  background: var(--color-accent-neon);
  color: #ffffff;
  font-size: 0.75rem;
  font-weight: 800;
  padding: 0.2rem 0.6rem;
  margin-bottom: 1rem;
  border: 1.5px solid var(--border-color);
}

.ai-card h3 {
  font-size: 1.3rem;
  margin-bottom: 0.65rem;
  color: var(--ink-deep);
}

/* 流媒体支持模块 */
.streaming-section {
  padding: 5rem 0;
  border-bottom: var(--border-width) solid var(--border-color);
}

.streaming-matrix-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
  margin-top: 2.5rem;
}

.stream-card {
  background: var(--bg-card);
  border: var(--border-width) solid var(--border-color);
  box-shadow: var(--shadow-solid);
  padding: 1.5rem;
}

.stream-card-platform {
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--ink-black);
  margin-bottom: 0.5rem;
}

.stream-card-spec {
  font-size: 0.9rem;
  color: #4b5563;
  margin-bottom: 0.75rem;
}

.stream-badge {
  display: inline-block;
  background: var(--color-accent-lime);
  color: var(--ink-black);
  font-weight: 800;
  font-size: 0.8rem;
  padding: 0.2rem 0.5rem;
  border: 1.5px solid var(--border-color);
}

/* 定价套餐模块（3 档，并列卡片，推荐中档） */
.pricing-section {
  padding: 5.5rem 0;
  border-bottom: var(--border-width) solid var(--border-color);
  background-color: var(--bg-canvas);
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  align-items: stretch;
  margin-top: 3rem;
}

.pricing-card {
  background: var(--bg-card);
  border: var(--border-width) solid var(--border-color);
  box-shadow: var(--shadow-solid);
  padding: 2.25rem 1.75rem;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: transform 0.15s ease;
}

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

.pricing-card.is-featured {
  background: #ffffff;
  border: 3.5px solid var(--border-color);
  box-shadow: 8px 8px 0 var(--border-color);
  transform: translateY(-8px);
}

.featured-ribbon {
  position: absolute;
  top: -16px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-accent-lime);
  color: var(--ink-black);
  border: var(--border-width) solid var(--border-color);
  padding: 0.35rem 1.25rem;
  font-weight: 900;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  white-space: nowrap;
}

.pricing-card-header {
  text-align: center;
  border-bottom: 2px dashed #f3e8ff;
  padding-bottom: 1.5rem;
  margin-bottom: 1.5rem;
}

.plan-tier-title {
  font-size: 1.45rem;
  font-weight: 900;
  color: var(--ink-deep);
  margin-bottom: 0.5rem;
}

.plan-price-wrap {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 0.25rem;
  margin: 0.85rem 0;
}

.price-currency {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--ink-black);
}

.price-amount {
  font-size: 2.75rem;
  font-weight: 900;
  color: var(--color-primary);
  line-height: 1;
}

.price-cycle {
  font-size: 0.95rem;
  color: #6b7280;
  font-weight: 600;
}

.plan-summary {
  font-size: 0.92rem;
  color: #4b5563;
}

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

.pricing-feature-item {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-size: 0.98rem;
  color: #1f2937;
}

.check-icon {
  width: 20px;
  height: 20px;
  background: var(--color-accent-lime);
  border: 1.5px solid var(--border-color);
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 900;
  flex-shrink: 0;
}

.pricing-action {
  margin-top: auto;
}

.pricing-action .button {
  width: 100%;
}

/* 人群对照模块 */
.audience-section {
  padding: 5rem 0;
  border-bottom: var(--border-width) solid var(--border-color);
}

.audience-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  margin-top: 3rem;
}

.audience-card {
  background: var(--bg-card);
  border: var(--border-width) solid var(--border-color);
  box-shadow: var(--shadow-solid);
  padding: 2rem 1.75rem;
}

.audience-header {
  border-bottom: 2px solid #f3e8ff;
  padding-bottom: 1rem;
  margin-bottom: 1rem;
}

.audience-name {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--ink-deep);
}

.audience-role {
  font-size: 0.88rem;
  color: var(--color-primary);
  font-weight: 700;
}

.audience-detail-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  font-size: 0.95rem;
}

/* FAQ 常见问答模块（按分类分组） */
.faq-section {
  padding: 5.5rem 0;
  border-bottom: var(--border-width) solid var(--border-color);
  background-color: #faf5ff;
}

.faq-categories-wrapper {
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
  max-width: 860px;
  margin: 3rem auto 0;
}

.faq-category-group {
  background: var(--bg-card);
  border: var(--border-width) solid var(--border-color);
  box-shadow: var(--shadow-solid);
  padding: 1.75rem;
}

.faq-category-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--ink-deep);
  border-bottom: 2px solid #e9d5ff;
  padding-bottom: 0.75rem;
  margin-bottom: 1.25rem;
}

.faq-accordion-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.faq-item {
  border: 1.5px solid var(--border-color);
  background: var(--bg-canvas);
}

.faq-question-btn {
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  padding: 1rem 1.25rem;
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--ink-black);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  font-family: inherit;
}

.faq-question-btn:hover {
  background-color: #fdf2f8;
}

.faq-icon-cross {
  font-size: 1.25rem;
  font-weight: 900;
  color: var(--color-primary);
  transition: transform 0.2s ease;
  line-height: 1;
}

.faq-item.is-open .faq-icon-cross {
  transform: rotate(45deg);
}

.faq-answer {
  display: none;
  padding: 0 1.25rem 1.25rem;
  color: #374151;
  font-size: 0.98rem;
  line-height: 1.7;
  border-top: 1px dashed #d8b4fe;
}

.faq-item.is-open .faq-answer {
  display: block;
  padding-top: 1rem;
}

/* 收尾 Final CTA 模块 */
.final-cta-section {
  padding: 5rem 0;
  background: var(--ink-deep);
  color: #ffffff;
  border-bottom: var(--border-width) solid var(--border-color);
  text-align: center;
  position: relative;
}

.final-cta-box {
  max-width: 780px;
  margin: 0 auto;
}

.final-cta-box h2 {
  color: #ffffff;
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  margin-bottom: 1.25rem;
}

.final-cta-box p {
  color: #e9d5ff;
  font-size: 1.15rem;
  margin-bottom: 2rem;
}

/* 全站页脚（严禁放置文章列表，硬性披露声明） */
.site-footer {
  background-color: var(--bg-canvas);
  padding: 3.5rem 0 2.5rem;
  font-size: 0.92rem;
  color: #4b5563;
}

.footer-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 2rem;
  padding-bottom: 2rem;
  border-bottom: 2px dashed #d8b4fe;
}

.footer-brand {
  max-width: 360px;
}

.footer-links {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.footer-links a {
  color: var(--ink-black);
  font-weight: 700;
  text-decoration: none;
}

.footer-links a:hover {
  color: var(--color-primary);
  text-decoration: underline;
}

.footer-disclosure-block {
  margin: 1.75rem 0;
  padding: 1rem 1.25rem;
  background: var(--bg-card);
  border: var(--border-width) solid var(--border-color);
  box-shadow: var(--shadow-solid-sm);
  font-size: 0.92rem;
  color: #374151;
  line-height: 1.6;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.85rem;
  color: #6b7280;
}

/* 移动端吸底 CTA 栏 */
.mobile-sticky-cta {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(8px);
  border-top: var(--border-width) solid var(--border-color);
  padding: 0.65rem 1rem;
  z-index: 99;
  box-shadow: 0 -4px 10px rgba(0, 0, 0, 0.08);
}

.mobile-sticky-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  max-width: 500px;
  margin: 0 auto;
}

.mobile-sticky-text {
  font-size: 0.88rem;
  font-weight: 800;
  color: var(--ink-deep);
  line-height: 1.3;
}

.mobile-sticky-btn {
  flex-shrink: 0;
  min-height: 44px;
  padding: 0.5rem 1.25rem;
  font-size: 0.95rem;
}

/* 文章详情页（杂志排印） */
.article-header {
  padding: 3rem 0 2rem;
  border-bottom: var(--border-width) solid var(--border-color);
  background: #faf5ff;
}

.breadcrumbs {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.88rem;
  font-weight: 700;
  color: #6b7280;
  margin-bottom: 1.25rem;
  flex-wrap: wrap;
}

.breadcrumbs a {
  color: var(--ink-black);
  text-decoration: none;
}

.breadcrumbs a:hover {
  color: var(--color-primary);
  text-decoration: underline;
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  font-size: 0.9rem;
  color: #4b5563;
  font-weight: 600;
  margin-top: 1rem;
}

.article-content-layout {
  padding: 3.5rem 0 5rem;
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 3.5rem;
  align-items: start;
}

.article-main {
  max-width: 800px;
  background: var(--bg-card);
  border: var(--border-width) solid var(--border-color);
  box-shadow: var(--shadow-solid);
  padding: 2.5rem;
}

.article-lead {
  font-size: 1.2rem;
  font-weight: 600;
  line-height: 1.8;
  color: var(--ink-deep);
  padding-bottom: 1.5rem;
  border-bottom: 2px dashed #f3e8ff;
  margin-bottom: 2rem;
}

.article-main h2 {
  font-size: 1.6rem;
  margin: 2.25rem 0 1rem;
  padding-left: 0.75rem;
  border-left: 5px solid var(--color-primary);
}

.article-main h3 {
  font-size: 1.25rem;
  margin: 1.5rem 0 0.75rem;
}

.article-main p {
  font-size: 1.05rem;
  line-height: 1.8;
  margin-bottom: 1.4rem;
}

.article-main ul, .article-main ol {
  margin-bottom: 1.5rem;
  padding-left: 1.5rem;
  font-size: 1.02rem;
}

.article-main li {
  margin-bottom: 0.5rem;
  line-height: 1.7;
}

.article-callout {
  background: var(--bg-muted);
  border: var(--border-width) solid var(--border-color);
  box-shadow: var(--shadow-solid-sm);
  padding: 1.25rem 1.5rem;
  margin: 2rem 0;
  border-radius: var(--radius-sm);
}

.article-callout-title {
  font-weight: 900;
  color: var(--ink-deep);
  margin-bottom: 0.5rem;
}

.article-cta-box {
  background: var(--bg-canvas);
  border: var(--border-width) solid var(--border-color);
  box-shadow: var(--shadow-solid);
  padding: 2rem;
  margin: 3rem 0 1.5rem;
  text-align: center;
}

.article-cta-box h3 {
  font-size: 1.4rem;
  margin-bottom: 0.75rem;
}

.article-sidebar {
  position: sticky;
  top: 90px;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.sidebar-widget {
  background: var(--bg-card);
  border: var(--border-width) solid var(--border-color);
  box-shadow: var(--shadow-solid);
  padding: 1.5rem;
}

.sidebar-widget-title {
  font-size: 1.15rem;
  font-weight: 900;
  color: var(--ink-deep);
  border-bottom: 2px solid #f3e8ff;
  padding-bottom: 0.75rem;
  margin-bottom: 1rem;
}

.sidebar-toc-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  font-size: 0.92rem;
}

.sidebar-toc-list a {
  color: #374151;
  text-decoration: none;
}

.sidebar-toc-list a:hover {
  color: var(--color-primary);
  text-decoration: underline;
}

/* 表格排印 */
.data-table-wrap {
  overflow-x: auto;
  margin: 2rem 0;
  border: var(--border-width) solid var(--border-color);
  box-shadow: var(--shadow-solid-sm);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.95rem;
  background: var(--bg-card);
}

.data-table th, .data-table td {
  padding: 0.85rem 1.1rem;
  border: 1px solid #e5e7eb;
}

.data-table th {
  background-color: var(--bg-muted);
  font-weight: 800;
  color: var(--ink-deep);
}

/* 指南列表页网格 */
.guides-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 2rem;
  margin: 3rem 0 5rem;
}

.guide-card {
  background: var(--bg-card);
  border: var(--border-width) solid var(--border-color);
  box-shadow: var(--shadow-solid);
  display: flex;
  flex-direction: column;
  transition: transform 0.15s ease;
  text-decoration: none;
  color: inherit;
  padding: 1.75rem;
}

.guide-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-solid-lg);
  text-decoration: none;
}

.guide-badge {
  align-self: flex-start;
  background: var(--bg-muted);
  border: 1.5px solid var(--border-color);
  font-size: 0.75rem;
  font-weight: 800;
  padding: 0.2rem 0.6rem;
  margin-bottom: 1rem;
}

.guide-card-title {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--ink-deep);
  margin-bottom: 0.75rem;
  line-height: 1.4;
}

.guide-card-excerpt {
  font-size: 0.95rem;
  color: #4b5563;
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

.guide-card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-primary);
  border-top: 1px dashed #e9d5ff;
  padding-top: 0.85rem;
}

/* 动效关键帧 */
@keyframes pulse-glow {
  0%, 100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.5;
    transform: scale(1.15);
  }
}

/* 响应式断点 */
@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 480px;
    margin-left: auto;
    margin-right: auto;
  }
  .pricing-card.is-featured {
    transform: none;
  }
  .audience-grid {
    grid-template-columns: 1fr;
  }
  .article-content-layout {
    grid-template-columns: 1fr;
  }
  .article-sidebar {
    display: none;
  }
}

@media (max-width: 768px) {
  :root {
    --container-padding: 16px;
    --shadow-offset: 3px;
  }
  .desktop-nav, .header-cta {
    display: none;
  }
  .mobile-menu-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
  }
  .feature-stagger-item, .feature-stagger-item.reverse {
    grid-template-columns: 1fr;
    direction: ltr;
  }
  .hero-section {
    padding: 2.5rem 0 2rem;
  }
  .features-section, .ai-acceleration-section, .streaming-section, .pricing-section, .audience-section, .faq-section, .final-cta-section {
    padding: 3.5rem 0;
  }
  .mobile-sticky-cta {
    display: block;
  }
  body {
    padding-bottom: 60px;
  }
  .article-main {
    padding: 1.5rem;
  }
}

/* 降低动效模式支持 */
@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;
  }
}