/* ====================================================================
   万达云 (wandayun.click) - 动漫红色系不规则高辨识度样式表
   设计语言：Anime Cyber-Crimson / 不规则排版 / Bento 网格 / 左右交替 / 动态字阶
   规范要求：系统原生字体栈，代码内置矢量背景，零外部CDN，纯CSS动态特效
   ==================================================================== */

:root {
  /* 动漫绯红配色系统 */
  --color-bg-deep: #0a070c;
  --color-bg: #100b14;
  --color-bg-card: #18111e;
  --color-bg-card-hover: #22172a;
  --color-bg-subtle: #1c1323;

  --color-text-main: #fcfcfd;
  --color-text-muted: #d4cad9;
  --color-text-light: #9f91a8;

  --color-crimson: #e11d48;
  --color-crimson-light: #fb7185;
  --color-crimson-bright: #ff2a5f;
  --color-crimson-dark: #9f1239;
  --color-crimson-subtle: rgba(225, 29, 72, 0.14);
  --color-crimson-border: rgba(244, 63, 94, 0.28);
  --color-crimson-glow: rgba(255, 42, 95, 0.35);

  --color-accent-amber: #f59e0b;
  --color-accent-purple: #a855f7;

  --font-stack: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 14px;
  --radius-xl: 18px;

  --shadow-neon: 0 0 22px rgba(225, 29, 72, 0.28), 0 4px 18px rgba(0, 0, 0, 0.6);
  --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.45), 0 0 1px 1px rgba(244, 63, 94, 0.15);
  --shadow-card-hover: 0 10px 32px rgba(225, 29, 72, 0.25), 0 0 2px 1px rgba(255, 42, 95, 0.4);

  --max-width: 1140px;
  --max-width-narrow: 840px;
}

*, *::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-stack);
  color: var(--color-text-main);
  background-color: var(--color-bg-deep);
  /* 内置写在代码里的动漫星空与数码光感网格背景，零外部请求 */
  background-image: 
    radial-gradient(circle at 50% 0%, rgba(225, 29, 72, 0.18) 0%, transparent 55%),
    radial-gradient(circle at 85% 30%, rgba(168, 85, 247, 0.12) 0%, transparent 45%),
    radial-gradient(circle at 15% 70%, rgba(159, 18, 57, 0.15) 0%, transparent 50%),
    linear-gradient(rgba(244, 63, 94, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(244, 63, 94, 0.03) 1px, transparent 1px);
  background-size: 100% 100%, 100% 100%, 100% 100%, 36px 36px, 36px 36px;
  background-attachment: fixed;
  line-height: 1.72;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

a {
  color: var(--color-crimson-light);
  text-decoration: none;
  transition: all 0.2s ease;
}

a:hover {
  color: #ffffff;
  text-shadow: 0 0 8px var(--color-crimson-glow);
  text-decoration: none;
}

:focus-visible {
  outline: 2px solid var(--color-crimson-bright);
  outline-offset: 3px;
}

/* 布局容器 */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
}

.container-narrow {
  width: 100%;
  max-width: var(--max-width-narrow);
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
}

/* 动漫科技风按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.96rem;
  line-height: 1.25;
  padding: 11px 24px;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  text-align: center;
  white-space: nowrap;
  transition: all 0.22s cubic-bezier(0.4, 0, 0.2, 1);
  text-decoration: none !important;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: linear-gradient(135deg, #e11d48 0%, #be123c 100%);
  color: #ffffff !important;
  border-color: #f43f5e;
  box-shadow: 0 2px 14px rgba(225, 29, 72, 0.45);
}

.btn-primary::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.25), transparent);
  transition: left 0.6s ease;
}

.btn-primary:hover {
  background: linear-gradient(135deg, #ff2a5f 0%, #e11d48 100%);
  box-shadow: 0 0 22px rgba(255, 42, 95, 0.65);
  transform: translateY(-2px);
}

.btn-primary:hover::before {
  left: 100%;
}

.btn-secondary {
  background-color: var(--color-bg-card);
  color: var(--color-text-main) !important;
  border: 1px solid var(--color-crimson-border);
}

.btn-secondary:hover {
  background-color: var(--color-bg-card-hover);
  border-color: var(--color-crimson-light);
  box-shadow: 0 0 14px rgba(225, 29, 72, 0.25);
  transform: translateY(-2px);
}

.btn-large {
  padding: 13px 30px;
  font-size: 1.05rem;
}

.btn-block {
  display: flex;
  width: 100%;
}

/* 顶部导航 Header */
.site-header {
  background-color: rgba(16, 11, 20, 0.88);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-crimson-border);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.brand-logo {
  font-size: 1.4rem;
  font-weight: 800;
  color: #ffffff !important;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  letter-spacing: 0.04em;
  text-shadow: 0 0 10px rgba(225, 29, 72, 0.5);
}

.brand-logo svg {
  color: var(--color-crimson-bright);
  filter: drop-shadow(0 0 6px rgba(255, 42, 95, 0.6));
}

.nav-menu {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 28px;
}

.nav-menu a {
  color: var(--color-text-muted);
  font-weight: 600;
  font-size: 0.94rem;
  position: relative;
  padding: 4px 0;
  transition: color 0.2s ease;
}

.nav-menu a::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-crimson-bright);
  box-shadow: 0 0 8px var(--color-crimson-glow);
  transition: width 0.2s ease;
}

.nav-menu a:hover,
.nav-menu a.active {
  color: #ffffff;
}

.nav-menu a:hover::after,
.nav-menu a.active::after {
  width: 100%;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

.mobile-toggle {
  display: none;
  background: var(--color-bg-card);
  border: 1px solid var(--color-crimson-border);
  border-radius: var(--radius-sm);
  padding: 7px 12px;
  font-size: 1.3rem;
  cursor: pointer;
  color: #ffffff;
  transition: all 0.2s ease;
}

.mobile-toggle:hover {
  border-color: var(--color-crimson-bright);
  box-shadow: 0 0 10px rgba(255, 42, 95, 0.4);
}

/* ====================================================================
   1. HERO 区域：代码内置动漫风景背景与震撼字阶排版
   ==================================================================== */
.hero-section {
  position: relative;
  overflow: hidden;
  padding: 100px 0 90px;
  border-bottom: 1px solid var(--color-crimson-border);
  min-height: 560px;
  display: flex;
  align-items: center;
}

/* 代码内置动漫全景背景层 */
.hero-bg-artwork {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 1;
  overflow: hidden;
}

.hero-bg-svg {
  width: 100%;
  height: 100%;
  min-width: 100%;
  min-height: 100%;
  object-fit: cover;
  display: block;
}

.anime-bg-float {
  transform-origin: center bottom;
  animation: animeFloat 10s ease-in-out infinite alternate;
}

/* 动漫背景遮罩：平衡画面层次与文字极致可读性 */
.hero-bg-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: 
    radial-gradient(circle at 22% 45%, rgba(10, 7, 12, 0.82) 0%, rgba(10, 7, 12, 0.45) 55%, rgba(10, 7, 12, 0.9) 100%),
    linear-gradient(180deg, rgba(10, 7, 12, 0.25) 0%, rgba(10, 7, 12, 0.5) 60%, #0a070c 100%);
  pointer-events: none;
}

.hero-container-content {
  position: relative;
  z-index: 2;
  width: 100%;
}

.hero-content {
  text-align: left;
  max-width: 780px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: rgba(225, 29, 72, 0.18);
  border: 1px solid var(--color-crimson-bright);
  color: #ff4d79;
  border-radius: 9999px;
  font-size: 0.86rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  margin-bottom: 22px;
  box-shadow: 0 0 18px rgba(225, 29, 72, 0.4);
  animation: crimsonPulse 3s infinite ease-in-out;
}

/* 动态字阶：主短语特大号突出，副短语稳健协调 */
.hero-title {
  font-weight: 900;
  line-height: 1.18;
  color: #ffffff;
  letter-spacing: -0.01em;
  margin-bottom: 22px;
}

.title-primary {
  display: block;
  font-size: 3.25rem;
  background: linear-gradient(135deg, #ffffff 0%, #ff6b8b 50%, #ff2a5f 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: 0 0 38px rgba(225, 29, 72, 0.5);
}

.title-secondary {
  display: block;
  font-size: 2.2rem;
  color: #ffffff;
  margin-top: 6px;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.8);
}

.hero-subtitle {
  font-size: 1.15rem;
  line-height: 1.76;
  color: var(--color-text-muted);
  margin-bottom: 34px;
  max-width: 620px;
  text-shadow: 0 1px 6px rgba(0, 0, 0, 0.9);
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 18px;
  margin-bottom: 36px;
}

/* 数据徽标微卡片 */
.hero-stats-row {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.hero-stat-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(24, 17, 30, 0.82);
  border: 1px solid rgba(244, 63, 94, 0.3);
  padding: 8px 16px;
  border-radius: var(--radius-md);
  font-size: 0.88rem;
  color: var(--color-text-muted);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.hero-stat-badge b {
  color: var(--color-crimson-bright);
  font-family: monospace, sans-serif;
  font-size: 0.98rem;
}

/* ====================================================================
   2. FEATURES 区域：不规则 Bento Grid 多形态网格
   ==================================================================== */
.features-section {
  padding: 76px 0;
}

.section-head {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 50px;
}

.section-head.head-left {
  text-align: left;
  margin-left: 0;
}

.section-head h2 {
  font-size: 2.15rem;
  font-weight: 800;
  color: #ffffff;
  letter-spacing: -0.01em;
  margin-bottom: 12px;
  position: relative;
  display: inline-block;
}

.section-head h2::after {
  content: "";
  display: block;
  width: 48px;
  height: 3px;
  background: linear-gradient(90deg, var(--color-crimson-bright), transparent);
  margin: 8px auto 0;
  border-radius: 2px;
  box-shadow: 0 0 8px var(--color-crimson-glow);
}

.section-head.head-left h2::after {
  margin: 8px 0 0;
}

.section-head p {
  font-size: 1.05rem;
  color: var(--color-text-muted);
  line-height: 1.65;
}

/* 不规则 Bento 网格 */
.features-bento-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-crimson-border);
  border-radius: var(--radius-lg);
  padding: 30px 26px;
  box-shadow: var(--shadow-card);
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  display: flex;
  flex-direction: column;
}

.feature-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 0;
  background: var(--color-crimson-bright);
  transition: height 0.25s ease;
  border-radius: 4px 0 0 4px;
}

.feature-card:hover {
  background-color: var(--color-bg-card-hover);
  border-color: var(--color-crimson-light);
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-4px);
}

.feature-card:hover::before {
  height: 100%;
}

/* Bento 变体：横向跨 2 列卡片 */
.feature-card.bento-span-2 {
  grid-column: span 2;
  background: linear-gradient(135deg, rgba(30, 20, 38, 0.95) 0%, rgba(22, 15, 28, 0.95) 100%);
  border-color: rgba(255, 42, 95, 0.38);
}

.feature-card.bento-span-2 .feature-title {
  font-size: 1.35rem;
}

.feature-bento-meta {
  margin-top: 18px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.84rem;
  font-family: monospace;
  color: var(--color-crimson-bright);
  background: rgba(225, 29, 72, 0.12);
  padding: 4px 12px;
  border-radius: var(--radius-sm);
  width: fit-content;
}

.feature-icon-wrap {
  width: 46px;
  height: 46px;
  border-radius: var(--radius-md);
  background: var(--color-crimson-subtle);
  border: 1px solid rgba(244, 63, 94, 0.35);
  color: var(--color-crimson-bright);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  box-shadow: 0 0 12px rgba(225, 29, 72, 0.2);
}

.feature-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 10px;
}

.feature-desc {
  font-size: 0.94rem;
  color: var(--color-text-muted);
  line-height: 1.65;
}

/* ====================================================================
   3. 流媒体与 AI 支持：左右交替交错排版 (Alternating Split)
   ==================================================================== */
.support-section {
  padding: 68px 0;
  background-color: var(--color-bg);
  border-top: 1px solid var(--color-crimson-border);
  border-bottom: 1px solid var(--color-crimson-border);
}

/* 左右分栏行 */
.alternating-split-row {
  display: grid;
  grid-template-columns: 1fr 1.08fr;
  gap: 36px;
  align-items: center;
}

.alternating-split-row.reverse-layout {
  grid-template-columns: 1.08fr 1fr;
}

.support-text-col h3 {
  font-size: 1.65rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 14px;
}

.support-text-col p {
  font-size: 1.02rem;
  color: var(--color-text-muted);
  line-height: 1.74;
  margin-bottom: 20px;
}

.support-highlight-quote {
  border-left: 3px solid var(--color-crimson-bright);
  background: rgba(28, 19, 35, 0.6);
  padding: 12px 18px;
  font-size: 0.92rem;
  color: #ff94b2;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.support-tags-col {
  background: var(--color-bg-card);
  border: 1px solid var(--color-crimson-border);
  border-radius: var(--radius-lg);
  padding: 30px 24px;
  box-shadow: var(--shadow-card);
}

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

.tech-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background-color: var(--color-bg-subtle);
  border: 1px solid rgba(244, 63, 94, 0.25);
  padding: 8px 16px;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: 600;
  color: #ffffff;
  transition: all 0.2s ease;
}

.tech-tag svg {
  color: var(--color-crimson-bright);
}

.tech-tag:hover {
  border-color: var(--color-crimson-bright);
  box-shadow: 0 0 12px rgba(255, 42, 95, 0.3);
  transform: translateY(-2px);
}

/* ====================================================================
   4. 使用场景：不规则高低错落卡片 (Staggered Grid)
   ==================================================================== */
.scenarios-section {
  padding: 76px 0 90px;
}

.staggered-scenarios-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
  align-items: flex-start;
}

.scenario-card {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-crimson-border);
  border-radius: var(--radius-lg);
  padding: 32px 26px;
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  transition: all 0.25s ease;
  position: relative;
}

/* 错落高低差控制 */
.scenario-card.stagger-down {
  transform: translateY(22px);
  border-color: rgba(255, 42, 95, 0.45);
  box-shadow: 0 8px 30px rgba(225, 29, 72, 0.22);
}

.scenario-card.stagger-up {
  transform: translateY(-8px);
}

.scenario-card:hover {
  background-color: var(--color-bg-card-hover);
  border-color: var(--color-crimson-bright);
  box-shadow: var(--shadow-card-hover);
}

.scenario-card.stagger-down:hover {
  transform: translateY(16px);
}

.scenario-card.stagger-up:hover {
  transform: translateY(-14px);
}

.scenario-index-marker {
  font-family: monospace;
  font-size: 0.8rem;
  color: var(--color-crimson-bright);
  margin-bottom: 8px;
  letter-spacing: 0.1em;
}

.scenario-target {
  display: inline-block;
  font-size: 0.84rem;
  font-weight: 700;
  color: #ff6b8b;
  background: rgba(225, 29, 72, 0.16);
  border: 1px solid rgba(244, 63, 94, 0.35);
  padding: 4px 12px;
  border-radius: var(--radius-sm);
  margin-bottom: 14px;
  width: fit-content;
}

.scenario-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 10px;
}

.scenario-device {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-crimson-light);
  margin-bottom: 14px;
}

.scenario-desc {
  font-size: 0.94rem;
  color: var(--color-text-muted);
  line-height: 1.66;
  margin-top: auto;
}

/* ====================================================================
   5. 专线对比表格 (HUD 机甲风格)
   ==================================================================== */
.benefits-section {
  padding: 68px 0;
  background-color: var(--color-bg);
  border-top: 1px solid var(--color-crimson-border);
  border-bottom: 1px solid var(--color-crimson-border);
}

.comparison-table-wrap {
  max-width: 920px;
  margin: 0 auto;
  overflow-x: auto;
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-crimson-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.94rem;
}

.comparison-table th,
.comparison-table td {
  padding: 18px 22px;
  border-bottom: 1px solid rgba(244, 63, 94, 0.15);
}

.comparison-table th {
  background-color: rgba(28, 19, 35, 0.95);
  font-weight: 700;
  color: #ffffff;
}

.comparison-table tr:last-child td {
  border-bottom: none;
}

.comparison-table td.highlight-col,
.comparison-table th.highlight-col {
  background-color: rgba(225, 29, 72, 0.1);
  color: #ffffff;
  font-weight: 600;
  border-left: 1px solid var(--color-crimson-border);
  border-right: 1px solid var(--color-crimson-border);
}

/* ====================================================================
   6. 定价卡区域：层次分明的高亮推荐
   ==================================================================== */
.pricing-section {
  padding: 78px 0;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  max-width: 1080px;
  margin: 0 auto;
  align-items: stretch;
}

.pricing-card {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-crimson-border);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all 0.25s ease;
}

.pricing-card.featured {
  border-color: var(--color-crimson-bright);
  box-shadow: 0 0 28px rgba(225, 29, 72, 0.35), 0 8px 30px rgba(0, 0, 0, 0.6);
  transform: translateY(-8px);
  background: linear-gradient(180deg, rgba(36, 24, 46, 0.95) 0%, rgba(24, 17, 30, 0.95) 100%);
}

.pricing-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-card-hover);
}

.pricing-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(90deg, #ff2a5f, #e11d48);
  color: #ffffff;
  padding: 4px 18px;
  border-radius: 9999px;
  font-size: 0.82rem;
  font-weight: 800;
  white-space: nowrap;
  letter-spacing: 0.04em;
  box-shadow: 0 0 14px rgba(255, 42, 95, 0.6);
  animation: crimsonPulse 2.5s infinite ease-in-out;
}

.pricing-audience {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--color-crimson-light);
  margin-bottom: 8px;
}

.pricing-title {
  font-size: 1.42rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 10px;
}

.pricing-desc {
  font-size: 0.92rem;
  color: var(--color-text-muted);
  line-height: 1.58;
  margin-bottom: 22px;
  min-height: 44px;
}

.pricing-price {
  font-size: 2.35rem;
  font-weight: 900;
  color: #ffffff;
  line-height: 1;
  margin-bottom: 24px;
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.pricing-price span {
  font-size: 0.96rem;
  font-weight: 500;
  color: var(--color-text-light);
}

.pricing-features {
  list-style: none;
  margin-bottom: 30px;
  flex-grow: 1;
}

.pricing-features li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.92rem;
  color: var(--color-text-muted);
  margin-bottom: 13px;
}

.pricing-features li svg {
  color: var(--color-crimson-bright);
  flex-shrink: 0;
  margin-top: 3px;
}

/* ====================================================================
   7. FAQ 区域：左右分栏排版 (Split FAQ Layout)
   ==================================================================== */
.faq-section {
  padding: 76px 0;
  background-color: var(--color-bg);
  border-top: 1px solid var(--color-crimson-border);
  border-bottom: 1px solid var(--color-crimson-border);
}

.faq-split-layout {
  display: grid;
  grid-template-columns: 0.85fr 1.35fr;
  gap: 48px;
  align-items: flex-start;
}

.faq-sidebar-sticky {
  position: sticky;
  top: 100px;
}

.faq-sidebar-tag {
  font-family: monospace;
  font-size: 0.84rem;
  color: var(--color-crimson-bright);
  margin-bottom: 12px;
  display: block;
}

.faq-sidebar-sticky h2 {
  font-size: 2.2rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 16px;
  line-height: 1.25;
}

.faq-sidebar-sticky p {
  font-size: 0.98rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: 24px;
}

.faq-list {
  width: 100%;
}

.faq-item {
  border-bottom: 1px solid rgba(244, 63, 94, 0.2);
  transition: background-color 0.2s ease;
}

.faq-item:first-child {
  border-top: 1px solid rgba(244, 63, 94, 0.2);
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 22px 6px;
  font-size: 1.12rem;
  font-weight: 700;
  color: #ffffff;
  cursor: pointer;
  list-style: none;
  user-select: none;
  transition: color 0.2s ease;
}

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

.faq-question::after {
  content: "+";
  font-size: 1.5rem;
  font-weight: 400;
  color: var(--color-crimson-light);
  line-height: 1;
  transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

details[open] .faq-question {
  color: var(--color-crimson-bright);
}

details[open] .faq-question::after {
  content: "−";
  transform: rotate(180deg);
}

.faq-answer {
  padding: 0 6px 22px;
  font-size: 0.96rem;
  color: var(--color-text-muted);
  line-height: 1.74;
}

/* ====================================================================
   8. FINAL CTA 转化区
   ==================================================================== */
.final-cta-section {
  padding: 80px 0;
  position: relative;
}

.final-cta-box {
  background: linear-gradient(135deg, rgba(28, 17, 35, 0.95) 0%, rgba(19, 13, 24, 0.95) 100%);
  border: 1px solid var(--color-crimson-bright);
  border-radius: var(--radius-lg);
  padding: 54px 34px;
  text-align: center;
  max-width: 860px;
  margin: 0 auto;
  box-shadow: 0 0 35px rgba(225, 29, 72, 0.35);
  position: relative;
  overflow: hidden;
}

.final-cta-box::before {
  content: "";
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(225, 29, 72, 0.12) 0%, transparent 60%);
  pointer-events: none;
  animation: crimsonRotate 12s linear infinite;
}

.final-cta-box h2 {
  font-size: 2rem;
  font-weight: 900;
  color: #ffffff;
  margin-bottom: 14px;
  position: relative;
  z-index: 2;
}

.final-cta-box p {
  font-size: 1.08rem;
  color: var(--color-text-muted);
  margin-bottom: 30px;
  position: relative;
  z-index: 2;
}

.final-cta-box .btn {
  position: relative;
  z-index: 2;
}

/* 页脚 Footer */
.site-footer {
  background-color: var(--color-bg-deep);
  border-top: 1px solid var(--color-crimson-border);
  padding: 48px 0 36px;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  list-style: none;
  gap: 18px 28px;
  margin-bottom: 22px;
}

.footer-nav a {
  color: var(--color-text-muted);
  font-size: 0.94rem;
  font-weight: 600;
}

.footer-nav a:hover {
  color: var(--color-crimson-light);
}

.footer-disclosure {
  text-align: center;
  font-size: 0.86rem;
  color: var(--color-text-light);
  margin-bottom: 12px;
}

.footer-copyright {
  text-align: center;
  font-size: 0.86rem;
  color: var(--color-text-light);
}

/* 移动端吸底 CTA */
.mobile-sticky-cta {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: rgba(16, 11, 20, 0.94);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-top: 1px solid var(--color-crimson-border);
  padding: 10px 16px env(safe-area-inset-bottom, 10px);
  z-index: 100;
  box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.6);
}

.mobile-sticky-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  max-width: 600px;
  margin: 0 auto;
}

.mobile-sticky-text {
  font-weight: 800;
  font-size: 0.94rem;
  color: #ffffff;
  line-height: 1.25;
}

.mobile-sticky-sub {
  font-size: 0.78rem;
  color: var(--color-crimson-light);
}

/* 通用页面头部 (About / Legal / Guides / Article) */
.page-header {
  padding: 46px 0 34px;
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-crimson-border);
  margin-bottom: 38px;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  color: var(--color-text-light);
  margin-bottom: 14px;
}

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

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

.page-header h1 {
  font-size: 2.25rem;
  font-weight: 800;
  color: #ffffff;
  letter-spacing: -0.01em;
  margin-bottom: 10px;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 18px;
  font-size: 0.9rem;
  color: var(--color-text-light);
  margin-top: 12px;
}

/* 文章正文 Prose */
.prose {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-crimson-border);
  border-radius: var(--radius-lg);
  padding: 42px;
  box-shadow: var(--shadow-card);
  margin-bottom: 50px;
}

.prose h2 {
  font-size: 1.6rem;
  font-weight: 800;
  color: #ffffff;
  margin-top: 38px;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(244, 63, 94, 0.2);
}

.prose h2:first-of-type {
  margin-top: 0;
}

.prose h3 {
  font-size: 1.24rem;
  font-weight: 700;
  color: #ffffff;
  margin-top: 26px;
  margin-bottom: 12px;
}

.prose p {
  font-size: 1.02rem;
  color: var(--color-text-muted);
  line-height: 1.82;
  margin-bottom: 20px;
}

.prose ul, .prose ol {
  margin-bottom: 22px;
  padding-left: 24px;
  color: var(--color-text-muted);
}

.prose li {
  margin-bottom: 8px;
  line-height: 1.72;
}

.prose strong {
  color: #ffffff;
}

.prose blockquote {
  border-left: 4px solid var(--color-crimson-bright);
  background-color: var(--color-bg-subtle);
  padding: 16px 22px;
  margin: 22px 0;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 0.98rem;
  color: var(--color-text-muted);
  box-shadow: inset 0 0 10px rgba(0, 0, 0, 0.2);
}

/* 文章内部 CTA 模块 */
.article-cta-box {
  background: linear-gradient(135deg, rgba(34, 23, 42, 0.95) 0%, rgba(24, 17, 30, 0.95) 100%);
  border: 1px solid var(--color-crimson-bright);
  border-radius: var(--radius-lg);
  padding: 34px;
  text-align: center;
  margin: 38px 0;
  box-shadow: 0 0 20px rgba(225, 29, 72, 0.25);
}

.article-cta-box h2 {
  font-size: 1.5rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 10px;
  border-bottom: none;
  padding-bottom: 0;
}

.article-cta-box p {
  font-size: 1rem;
  color: var(--color-text-muted);
  margin-bottom: 22px;
}

/* 站内互链模块 */
.internal-links-box {
  background-color: var(--color-bg-subtle);
  border: 1px solid var(--color-crimson-border);
  border-radius: var(--radius-md);
  padding: 26px 30px;
  margin-top: 34px;
}

.internal-links-box h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: #ffffff;
  margin-top: 0;
  margin-bottom: 14px;
}

.internal-links-box ul {
  margin-bottom: 0;
  padding-left: 20px;
}

.internal-links-box li {
  margin-bottom: 8px;
  font-size: 0.94rem;
}

/* 指南中心卡片 (zhinan.html) */
.guides-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-bottom: 50px;
}

.guide-card {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-crimson-border);
  border-radius: var(--radius-lg);
  padding: 26px;
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  transition: all 0.25s ease;
}

.guide-card:hover {
  background-color: var(--color-bg-card-hover);
  border-color: var(--color-crimson-bright);
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-4px);
}

.guide-thumb-wrap {
  width: 100%;
  height: 160px;
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-bottom: 18px;
  background-color: var(--color-bg-deep);
  border: 1px solid var(--color-crimson-border);
}

.guide-thumb-wrap svg {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.guide-card-tag {
  font-size: 0.82rem;
  font-weight: 700;
  color: #ff4d79;
  background-color: var(--color-crimson-subtle);
  border: 1px solid rgba(244, 63, 94, 0.3);
  padding: 3px 10px;
  border-radius: var(--radius-sm);
  display: inline-block;
  margin-bottom: 12px;
  width: fit-content;
}

.guide-card h3 {
  font-size: 1.24rem;
  font-weight: 700;
  margin-bottom: 10px;
  line-height: 1.42;
}

.guide-card h3 a {
  color: #ffffff;
}

.guide-card h3 a:hover {
  color: var(--color-crimson-light);
}

.guide-card p {
  font-size: 0.94rem;
  color: var(--color-text-muted);
  line-height: 1.64;
  margin-bottom: 18px;
  flex-grow: 1;
}

.guide-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.84rem;
  color: var(--color-text-light);
  border-top: 1px solid rgba(244, 63, 94, 0.2);
  padding-top: 14px;
}

/* 网站地图 (sitemap.html) */
.sitemap-group {
  margin-bottom: 38px;
}

.sitemap-group h2 {
  font-size: 1.4rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 16px;
  border-bottom: 1px solid rgba(244, 63, 94, 0.25);
  padding-bottom: 8px;
}

.sitemap-list {
  list-style: disc;
  padding-left: 24px;
}

.sitemap-list li {
  margin-bottom: 10px;
  font-size: 0.96rem;
}

/* 核心动态关键帧动画 (纯 CSS 硬件加速) */
@keyframes crimsonPulse {
  0%, 100% {
    box-shadow: 0 0 14px rgba(225, 29, 72, 0.35);
  }
  50% {
    box-shadow: 0 0 26px rgba(255, 42, 95, 0.65);
  }
}

@keyframes crimsonRotate {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

@keyframes animeFloat {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-6px);
  }
}

.anime-float {
  animation: animeFloat 4s ease-in-out infinite;
}

/* 响应式适配 (移动端优先) */
@media (max-width: 992px) {
  .hero-section {
    padding: 76px 0 68px;
    min-height: auto;
  }

  .hero-content {
    text-align: center;
    max-width: 680px;
    margin: 0 auto;
  }

  .hero-subtitle {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-actions {
    justify-content: center;
  }

  .hero-stats-row {
    justify-content: center;
  }

  .features-bento-grid {
    grid-template-columns: 1fr;
  }

  .feature-card.bento-span-2 {
    grid-column: span 1;
  }

  .alternating-split-row,
  .alternating-split-row.reverse-layout {
    grid-template-columns: 1fr;
  }

  .staggered-scenarios-grid {
    grid-template-columns: 1fr;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
  }

  .scenario-card.stagger-down,
  .scenario-card.stagger-up {
    transform: none !important;
  }

  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 620px;
    margin-left: auto;
    margin-right: auto;
  }

  .pricing-card.featured {
    transform: none;
  }

  .faq-split-layout {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .faq-sidebar-sticky {
    position: static;
    text-align: center;
  }

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

@media (max-width: 768px) {
  .title-primary {
    font-size: 2.3rem;
  }

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

  .hero-subtitle {
    font-size: 1.05rem;
  }

  .hero-actions {
    flex-direction: column;
    width: 100%;
  }

  .hero-actions .btn {
    width: 100%;
  }

  .nav-menu {
    display: none;
    position: absolute;
    top: 70px;
    left: 0;
    right: 0;
    background-color: rgba(16, 11, 20, 0.98);
    border-bottom: 1px solid var(--color-crimson-border);
    flex-direction: column;
    padding: 18px 20px;
    gap: 18px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.8);
  }

  .nav-menu.open {
    display: flex;
  }

  .mobile-toggle {
    display: block;
  }

  .mobile-sticky-cta {
    display: block;
  }

  body {
    padding-bottom: 76px;
  }

  .prose {
    padding: 26px 18px;
  }
}

@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;
  }
}