/* 耶耶云 - 苍穹晴空与追光次元风动视觉设计 (Layer 1.5 Anime Theme: Azure Sky & Sunbeams) */
:root {
  --sky-deep: #081a30;
  --sky-navy: #0f2b48;
  --sky-base: #0284c7;
  --sky-hover: #0369a1;
  --sky-bright: #0ea5e9;
  --sky-light: #38bdf8;
  --sky-feather: #bae6fd;
  --sun-gold: #f59e0b;
  --sun-gold-light: #fef3c7;
  --sun-gold-hover: #d97706;
  --cloud-bg: #f8fafc;
  --cloud-card: #ffffff;
  --cloud-subtle: #f0f9ff;
  --text-main: #0c2340;
  --text-sub: #334155;
  --text-muted: #64748b;
  --border-light: #e0f2fe;
  --border-glass: rgba(56, 189, 248, 0.32);
  --border-gold: rgba(245, 158, 11, 0.4);
  --success: #059669;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --container-max: 1160px;
  --font-base: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --shadow-cloud: 0 10px 30px -10px rgba(14, 165, 233, 0.12), 0 4px 8px -2px rgba(15, 23, 42, 0.04);
  --shadow-hover: 0 20px 40px -12px rgba(14, 165, 233, 0.22), 0 8px 16px -4px rgba(15, 23, 42, 0.06);
}

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

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

body {
  font-family: var(--font-base);
  background-color: var(--cloud-bg);
  background-image: 
    radial-gradient(circle at 85% 8%, rgba(56, 189, 248, 0.14) 0%, transparent 45%),
    radial-gradient(circle at 15% 18%, rgba(245, 158, 11, 0.08) 0%, transparent 40%),
    radial-gradient(circle at 50% 65%, rgba(14, 165, 233, 0.06) 0%, transparent 60%);
  background-attachment: fixed;
  color: var(--text-main);
  line-height: 1.72;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  position: relative;
  overflow-x: hidden;
}

/* 苍穹晨光粒子 Canvas 动效图层 */
#skyCanvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  opacity: 0.85;
}

a {
  color: var(--sky-base);
  text-decoration: none;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

a:hover {
  color: var(--sky-hover);
}

img, svg {
  vertical-align: middle;
  max-width: 100%;
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
  position: relative;
  z-index: 1;
}

/* 顶部导航 Header (半透明晴空冰晶毛玻璃效果) */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-light);
  box-shadow: 0 4px 20px -4px rgba(14, 165, 233, 0.06);
  transition: padding 0.25s ease, background-color 0.25s ease;
}

.site-header.is-scrolled {
  background-color: rgba(255, 255, 255, 0.96);
  box-shadow: 0 6px 24px -4px rgba(14, 165, 233, 0.12);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  transition: height 0.2s ease;
}

.site-header.is-scrolled .header-inner {
  height: 60px;
}

.brand-link {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text-main);
  min-height: 44px;
}

.brand-logo-icon {
  filter: drop-shadow(0 2px 8px rgba(2, 132, 199, 0.3));
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.brand-link:hover .brand-logo-icon {
  transform: rotate(-6deg) scale(1.08);
}

.brand-title {
  font-size: 1.28rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, var(--sky-deep) 0%, var(--sky-base) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-link {
  font-size: 0.95rem;
  color: var(--text-sub);
  font-weight: 600;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  position: relative;
  transition: color 0.2s ease;
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: 8px;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--sky-base), var(--sky-light));
  border-radius: 99px;
  transition: width 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.nav-link:hover, .nav-link.active {
  color: var(--sky-base);
}

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

.nav-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 8px 22px;
  background: linear-gradient(135deg, var(--sky-base) 0%, #0369a1 100%);
  color: #ffffff !important;
  font-size: 0.92rem;
  font-weight: 700;
  border-radius: var(--radius-sm);
  box-shadow: 0 4px 14px rgba(2, 132, 199, 0.32);
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
  overflow: hidden;
}

.nav-cta::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 60%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.35), transparent);
  transform: skewX(-25deg);
  transition: left 0.6s ease;
}

.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(2, 132, 199, 0.45);
}

.nav-cta:hover::before {
  left: 140%;
}

.mobile-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  min-height: 44px;
  min-width: 44px;
  padding: 8px;
  cursor: pointer;
  color: var(--text-main);
}

/* 高转化动感 CTA 按钮规范 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  font-size: 1.02rem;
  font-weight: 700;
  padding: 12px 28px;
  border-radius: var(--radius-sm);
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  cursor: pointer;
  border: 1px solid transparent;
  text-align: center;
  position: relative;
  overflow: hidden;
  user-select: none;
}

.btn-primary {
  background: linear-gradient(135deg, #0284c7 0%, #0369a1 100%);
  color: #ffffff !important;
  box-shadow: 0 6px 18px rgba(2, 132, 199, 0.35);
}

.btn-primary::after {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 50%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
  transform: skewX(-20deg);
  transition: left 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(2, 132, 199, 0.45);
}

.btn-primary:hover::after {
  left: 150%;
}

.btn-primary:active {
  transform: translateY(1px) scale(0.98);
}

.btn-secondary {
  background-color: #ffffff;
  color: var(--text-main) !important;
  border: 1px solid var(--border-strong);
  box-shadow: 0 2px 8px rgba(15, 23, 42, 0.04);
}

.btn-secondary:hover {
  border-color: var(--sky-base);
  color: var(--sky-base) !important;
  background-color: var(--cloud-subtle);
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(14, 165, 233, 0.15);
}

.btn-secondary:active {
  transform: translateY(1px);
}

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

/* Hero 首屏 (新海诚晴空追光次元美学) */
.hero-section {
  padding: 72px 0 64px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.95) 0%, rgba(240, 249, 255, 0.75) 100%);
  border-bottom: 1px solid var(--border-light);
  position: relative;
  overflow: hidden;
}

.hero-section::before {
  content: "";
  position: absolute;
  top: -60px;
  right: -60px;
  width: 380px;
  height: 380px;
  background: radial-gradient(circle, rgba(56, 189, 248, 0.22) 0%, rgba(251, 191, 36, 0.12) 40%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.12fr 0.88fr;
  gap: 48px;
  align-items: center;
}

.hero-lead-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  color: var(--sky-base);
  background: linear-gradient(135deg, rgba(224, 242, 254, 0.8) 0%, rgba(254, 243, 199, 0.6) 100%);
  border: 1px solid var(--border-glass);
  padding: 5px 14px;
  border-radius: 99px;
  font-weight: 600;
  margin-bottom: 18px;
  box-shadow: 0 2px 10px rgba(14, 165, 233, 0.1);
}

.hero-lead-badge .badge-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--sky-base);
  box-shadow: 0 0 8px var(--sky-light);
  animation: pulseDot 2s infinite ease-in-out;
}

@keyframes pulseDot {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.4); opacity: 0.6; }
}

.hero-title {
  font-size: 2.7rem;
  font-weight: 800;
  line-height: 1.24;
  letter-spacing: -0.03em;
  color: var(--sky-deep);
  margin-bottom: 20px;
}

.hero-title-accent {
  background: linear-gradient(135deg, var(--sky-base) 0%, #0369a1 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.15rem;
  line-height: 1.7;
  color: var(--text-sub);
  margin-bottom: 32px;
  max-width: 580px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  align-items: center;
  flex-wrap: wrap;
  margin-bottom: 34px;
}

.hero-commitments {
  display: flex;
  gap: 22px;
  padding-top: 22px;
  border-top: 1px dashed var(--border-light);
  flex-wrap: wrap;
}

.commitment-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-sub);
}

.commitment-item svg {
  color: var(--sky-base);
  flex-shrink: 0;
  filter: drop-shadow(0 2px 4px rgba(14, 165, 233, 0.25));
}

/* 苍穹次元风向罗盘状态中枢 (Hero Visual Panel) */
.hero-status-panel {
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-cloud);
  position: relative;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.hero-status-panel:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
}

.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-light);
  margin-bottom: 18px;
}

.panel-title {
  font-size: 1.02rem;
  font-weight: 800;
  color: var(--sky-deep);
  display: flex;
  align-items: center;
  gap: 8px;
}

.panel-title-icon {
  width: 18px;
  height: 18px;
  color: var(--sky-base);
}

.panel-status {
  font-size: 0.82rem;
  color: var(--success);
  font-weight: 700;
  background-color: #ecfdf5;
  border: 1px solid #a7f3d0;
  padding: 3px 10px;
  border-radius: 99px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.panel-status::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--success);
  animation: pulseDot 1.8s infinite;
}

/* 苍穹次元风向罗盘动态矢量图 */
.astrolabe-visual-box {
  position: relative;
  width: 100%;
  height: 140px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  background: radial-gradient(circle, rgba(224, 242, 254, 0.5) 0%, transparent 70%);
}

.astrolabe-ring-outer {
  animation: rotateRing 32s linear infinite;
  transform-origin: center;
}

.astrolabe-ring-inner {
  animation: rotateRingReverse 20s linear infinite;
  transform-origin: center;
}

@keyframes rotateRing {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes rotateRingReverse {
  from { transform: rotate(360deg); }
  to { transform: rotate(0deg); }
}

.panel-metric-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.panel-metric-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.92rem;
  padding: 8px 12px;
  background: rgba(240, 249, 255, 0.5);
  border-radius: var(--radius-sm);
  border: 1px solid rgba(224, 242, 254, 0.6);
  transition: background-color 0.2s ease;
}

.panel-metric-row:hover {
  background: rgba(224, 242, 254, 0.85);
}

.metric-label {
  color: var(--text-sub);
  display: flex;
  align-items: center;
  gap: 6px;
}

.metric-value {
  font-weight: 700;
  color: var(--sky-deep);
}

.val-tag {
  font-size: 0.72rem;
  padding: 2px 6px;
  background-color: var(--sky-feather);
  color: var(--sky-hover);
  border-radius: 4px;
  font-weight: 700;
  margin-left: 6px;
}

.panel-note {
  margin-top: 18px;
  padding: 10px 14px;
  background: #ffffff;
  border: 1px dashed var(--border-light);
  border-radius: var(--radius-sm);
  font-size: 0.84rem;
  color: var(--text-muted);
  line-height: 1.55;
}

/* 章节通用标题与排版 */
.section {
  padding: 72px 0;
  position: relative;
}

.section-alt {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.9) 0%, rgba(248, 250, 252, 0.95) 100%);
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
}

.section-head {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 52px;
}

.section-pill-tag {
  display: inline-block;
  font-size: 0.82rem;
  color: var(--sky-base);
  font-weight: 700;
  background-color: var(--cloud-subtle);
  border: 1px solid var(--border-glass);
  padding: 3px 12px;
  border-radius: 99px;
  margin-bottom: 12px;
  letter-spacing: 0.04em;
}

.section-title {
  font-size: 2.1rem;
  font-weight: 800;
  color: var(--sky-deep);
  letter-spacing: -0.02em;
  margin-bottom: 14px;
}

.section-desc {
  font-size: 1.06rem;
  color: var(--text-sub);
  line-height: 1.65;
}

/* 1. 核心优势 Benefits (3列 浮岛晶体卡片) */
.benefits-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}

.benefit-card {
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 32px 26px;
  box-shadow: var(--shadow-cloud);
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
  overflow: hidden;
}

.benefit-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--sky-base), var(--sky-light));
  opacity: 0;
  transition: opacity 0.3s ease;
}

.benefit-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-hover);
  border-color: var(--border-glass);
}

.benefit-card:hover::before {
  opacity: 1;
}

.benefit-icon-box {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--cloud-subtle) 0%, var(--sky-feather) 100%);
  color: var(--sky-base);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 22px;
  box-shadow: 0 4px 12px rgba(14, 165, 233, 0.15);
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.benefit-card:hover .benefit-icon-box {
  transform: scale(1.1) rotate(-4deg);
}

.benefit-title {
  font-size: 1.25rem;
  font-weight: 800;
  margin-bottom: 12px;
  color: var(--sky-deep);
}

.benefit-text {
  font-size: 0.95rem;
  color: var(--text-sub);
  line-height: 1.68;
}

/* 2. 技术特性 Features (6卡网格 微光流线) */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.feature-card {
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 26px;
  box-shadow: 0 4px 16px rgba(15, 23, 42, 0.03);
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
}

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

.feature-title {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--sky-deep);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.feature-title svg {
  color: var(--sky-base);
  flex-shrink: 0;
  transition: transform 0.25s ease;
}

.feature-card:hover .feature-title svg {
  transform: scale(1.15);
}

.feature-desc {
  font-size: 0.92rem;
  color: var(--text-sub);
  line-height: 1.65;
}

/* 3. 流媒体与 AI 支持模块 (苍穹应用生态) */
.support-ecosystem-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 26px;
}

.support-box {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  box-shadow: var(--shadow-cloud);
  transition: all 0.3s ease;
}

.support-box:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--border-glass);
}

.support-box-title {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--sky-deep);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.support-box-title svg {
  color: var(--sky-base);
}

.support-box-desc {
  font-size: 0.95rem;
  color: var(--text-sub);
  line-height: 1.66;
  margin-bottom: 22px;
}

.support-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
}

.support-tag {
  font-size: 0.86rem;
  padding: 6px 14px;
  background: var(--cloud-subtle);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  color: var(--sky-deep);
  font-weight: 600;
  transition: all 0.2s ease;
}

.support-tag:hover {
  background: #ffffff;
  border-color: var(--sky-base);
  color: var(--sky-base);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(14, 165, 233, 0.12);
}

/* 4. 使用场景卡 (4张卡 晴空画框) */
.scenarios-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
}

.scenario-card {
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 26px;
  display: flex;
  flex-direction: column;
  box-shadow: 0 4px 16px rgba(15, 23, 42, 0.03);
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.scenario-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-glass);
  box-shadow: var(--shadow-cloud);
}

.scenario-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-light);
}

.scenario-title {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--sky-deep);
}

.scenario-devices {
  font-size: 0.82rem;
  color: var(--sky-base);
  font-weight: 700;
  background-color: var(--cloud-subtle);
  border: 1px solid var(--border-glass);
  padding: 3px 10px;
  border-radius: 99px;
}

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

/* 5. 定价方案 Pricing (3档，主力推荐光环) */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
  align-items: stretch;
}

.pricing-card {
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 36px 28px;
  display: flex;
  flex-direction: column;
  position: relative;
  box-shadow: var(--shadow-cloud);
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.pricing-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
}

.pricing-card.featured {
  border: 2px solid var(--sky-bright);
  box-shadow: 0 0 0 1px var(--sky-bright), 0 20px 48px -12px rgba(14, 165, 233, 0.28);
  background: linear-gradient(180deg, #ffffff 0%, rgba(240, 249, 255, 0.6) 100%);
}

.pricing-featured-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, var(--sky-base) 0%, #0369a1 100%);
  color: #ffffff;
  font-size: 0.8rem;
  font-weight: 800;
  padding: 4px 16px;
  border-radius: 99px;
  letter-spacing: 0.04em;
  box-shadow: 0 4px 14px rgba(2, 132, 199, 0.4);
}

.pricing-card-header {
  margin-bottom: 20px;
  text-align: center;
}

.pricing-tier-name {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--sky-deep);
  margin-bottom: 8px;
}

.pricing-tier-target {
  font-size: 0.88rem;
  color: var(--text-sub);
}

.pricing-card-price {
  text-align: center;
  margin-bottom: 26px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--border-light);
}

.price-currency {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--sky-deep);
  vertical-align: top;
}

.price-amount {
  font-size: 2.7rem;
  font-weight: 800;
  color: var(--sky-deep);
  line-height: 1;
}

.price-period {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.pricing-spec-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 13px;
  margin-bottom: 32px;
  flex-grow: 1;
}

.pricing-spec-item {
  font-size: 0.93rem;
  color: var(--text-sub);
  display: flex;
  align-items: center;
  gap: 10px;
}

.pricing-spec-item svg {
  color: var(--success);
  flex-shrink: 0;
}

/* 6. FAQ 手风琴 (7问 丝滑展开) */
.faq-list {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.faq-item {
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(15, 23, 42, 0.02);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

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

.faq-item.active {
  border-color: var(--sky-base);
  box-shadow: 0 6px 18px rgba(14, 165, 233, 0.1);
}

.faq-toggle-btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 54px;
  padding: 16px 22px;
  background: none;
  border: none;
  cursor: pointer;
  text-align: left;
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--sky-deep);
  font-family: inherit;
  transition: background-color 0.2s ease;
}

.faq-toggle-btn:hover {
  background-color: var(--cloud-subtle);
}

.faq-toggle-btn:focus-visible {
  outline: 2px solid var(--sky-base);
  outline-offset: -2px;
}

.faq-icon {
  width: 20px;
  height: 20px;
  color: var(--text-muted);
  transition: transform 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
  flex-shrink: 0;
}

.faq-item.active .faq-icon {
  transform: rotate(180deg);
  color: var(--sky-base);
}

.faq-answer {
  display: none;
  padding: 0 22px 20px;
  font-size: 0.95rem;
  color: var(--text-sub);
  line-height: 1.7;
  border-top: 1px solid var(--border-light);
  background-color: #fafcff;
}

.faq-item.active .faq-answer {
  display: block;
  animation: fadeInDown 0.25s ease-out;
}

@keyframes fadeInDown {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Final CTA 倒二模块 (光华聚集) */
.final-cta-section {
  padding: 72px 0;
  background: linear-gradient(135deg, rgba(240, 249, 255, 0.9) 0%, rgba(224, 242, 254, 0.8) 100%);
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
  position: relative;
  overflow: hidden;
}

.final-cta-section::after {
  content: "";
  position: absolute;
  bottom: -50px;
  left: 50%;
  transform: translateX(-50%);
  width: 500px;
  height: 200px;
  background: radial-gradient(ellipse, rgba(56, 189, 248, 0.25) 0%, transparent 70%);
  pointer-events: none;
}

.final-cta-card {
  text-align: center;
  max-width: 740px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.final-cta-title {
  font-size: 2.3rem;
  font-weight: 800;
  color: var(--sky-deep);
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.final-cta-subtitle {
  font-size: 1.1rem;
  color: var(--text-sub);
  margin-bottom: 32px;
  line-height: 1.65;
}

/* 页脚 Footer (Layer 2 规范: 仅放导航与版权，含联盟披露，无文章列表) */
.site-footer {
  background-color: #ffffff;
  padding: 44px 0 30px;
  border-top: 1px solid var(--border-light);
  color: var(--text-sub);
  font-size: 0.9rem;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 26px;
  padding-bottom: 26px;
  border-bottom: 1px solid var(--border-light);
}

.footer-brand-wrap {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.footer-disclosure {
  font-size: 0.84rem;
  color: var(--text-muted);
}

.footer-nav {
  display: flex;
  align-items: center;
  gap: 22px;
  flex-wrap: wrap;
}

.footer-nav a {
  color: var(--text-sub);
  font-size: 0.9rem;
  font-weight: 500;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  transition: color 0.2s ease;
}

.footer-nav a:hover {
  color: var(--sky-base);
}

.footer-bottom {
  padding-top: 22px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.84rem;
  color: var(--text-muted);
}

/* 移动端吸底 CTA 栏 (<=768px 显示) */
.mobile-sticky-bar {
  display: none;
}

@media (max-width: 768px) {
  .mobile-sticky-bar {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 999;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-top: 1px solid var(--border-light);
    padding: 10px 18px;
    box-shadow: 0 -4px 18px rgba(15, 23, 42, 0.08);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    transform: translateY(100%);
    transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  }

  .mobile-sticky-bar.is-visible {
    transform: translateY(0);
  }

  .sticky-bar-text {
    display: flex;
    flex-direction: column;
  }

  .sticky-bar-brand {
    font-size: 0.88rem;
    font-weight: 800;
    color: var(--sky-deep);
  }

  .sticky-bar-tag {
    font-size: 0.76rem;
    color: var(--text-muted);
  }

  .sticky-bar-btn {
    min-height: 44px;
    padding: 8px 20px;
    font-size: 0.92rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--sky-base) 0%, #0369a1 100%);
    color: #ffffff !important;
    border-radius: var(--radius-sm);
    flex-shrink: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 12px rgba(2, 132, 199, 0.3);
  }
}

/* 内页布局与面包屑 */
.breadcrumb-wrap {
  padding: 14px 0;
  background-color: #ffffff;
  border-bottom: 1px solid var(--border-light);
}

.breadcrumb-list {
  display: flex;
  align-items: center;
  gap: 8px;
  list-style: none;
  font-size: 0.88rem;
  color: var(--text-muted);
}

.breadcrumb-list a {
  color: var(--text-sub);
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

.breadcrumb-list a:hover {
  color: var(--sky-base);
}

.breadcrumb-separator {
  color: var(--border-strong);
}

.page-header {
  padding: 48px 0 38px;
  background: linear-gradient(180deg, #ffffff 0%, var(--cloud-subtle) 100%);
  border-bottom: 1px solid var(--border-light);
}

.page-header h1 {
  font-size: 2.3rem;
  font-weight: 800;
  color: var(--sky-deep);
  margin-bottom: 10px;
}

.page-header-meta {
  font-size: 0.9rem;
  color: var(--text-muted);
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.page-body {
  padding: 52px 0 68px;
}

.legal-article-card {
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 44px;
  max-width: 900px;
  margin: 0 auto;
  box-shadow: var(--shadow-cloud);
}

.legal-article-card h2 {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--sky-deep);
  margin: 34px 0 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-light);
}

.legal-article-card h2:first-of-type {
  margin-top: 0;
}

.legal-article-card p {
  font-size: 1rem;
  color: var(--text-sub);
  line-height: 1.78;
  margin-bottom: 18px;
}

.legal-article-card ul, .legal-article-card ol {
  margin-left: 20px;
  margin-bottom: 22px;
  color: var(--text-sub);
  font-size: 0.96rem;
  line-height: 1.72;
}

.legal-article-card li {
  margin-bottom: 8px;
}

/* SEO 文章正文排版规范 */
.article-container {
  max-width: 860px;
  margin: 0 auto;
}

.article-content {
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 44px;
  margin-bottom: 34px;
  box-shadow: var(--shadow-cloud);
}

.article-lead {
  font-size: 1.08rem;
  line-height: 1.8;
  color: var(--sky-deep);
  background: linear-gradient(135deg, rgba(224, 242, 254, 0.7) 0%, rgba(254, 243, 199, 0.5) 100%);
  border-left: 4px solid var(--sky-base);
  padding: 18px 22px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin-bottom: 30px;
}

.article-content h2 {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--sky-deep);
  margin: 38px 0 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-light);
}

.article-content h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--sky-deep);
  margin: 26px 0 12px;
}

.article-content p {
  font-size: 1rem;
  color: var(--text-sub);
  line-height: 1.8;
  margin-bottom: 18px;
}

.article-content ul, .article-content ol {
  margin-left: 22px;
  margin-bottom: 22px;
  color: var(--text-sub);
  font-size: 0.96rem;
  line-height: 1.74;
}

.article-content li {
  margin-bottom: 8px;
}

.article-table-wrap {
  overflow-x: auto;
  margin: 26px 0;
}

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

.article-table th, .article-table td {
  padding: 13px 16px;
  border: 1px solid var(--border-light);
  text-align: left;
}

.article-table th {
  background-color: var(--cloud-subtle);
  color: var(--sky-deep);
  font-weight: 800;
}

.article-cta-box {
  background: linear-gradient(135deg, rgba(224, 242, 254, 0.8) 0%, rgba(240, 249, 255, 0.9) 100%);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  padding: 28px;
  text-align: center;
  margin: 38px 0 22px;
  box-shadow: 0 4px 16px rgba(14, 165, 233, 0.1);
}

.article-cta-box h3 {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--sky-deep);
  margin-bottom: 10px;
}

.article-cta-box p {
  font-size: 0.95rem;
  color: var(--text-sub);
  margin-bottom: 20px;
}

.article-internal-links {
  background-color: var(--cloud-subtle);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  padding: 20px 22px;
  margin-top: 34px;
}

.article-internal-title {
  font-size: 1rem;
  font-weight: 800;
  color: var(--sky-deep);
  margin-bottom: 12px;
}

.article-internal-links ul {
  list-style: none;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.article-internal-links li a {
  font-size: 0.92rem;
  color: var(--sky-base);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 44px;
  font-weight: 600;
}

.article-internal-links li a:hover {
  color: var(--sky-hover);
  text-decoration: underline;
}

/* 指南导航卡片网格 (zhinan.html 晴空浮岛卡片) */
.guides-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 26px;
}

.guide-card {
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 26px;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-cloud);
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.guide-card:hover {
  transform: translateY(-5px);
  border-color: var(--border-glass);
  box-shadow: var(--shadow-hover);
}

.guide-thumb-wrap {
  width: 100%;
  height: 140px;
  background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  transition: transform 0.3s ease;
}

.guide-card:hover .guide-thumb-wrap {
  transform: scale(1.02);
}

.guide-category {
  font-size: 0.82rem;
  color: var(--sky-base);
  font-weight: 700;
  margin-bottom: 6px;
}

.guide-card-title {
  font-size: 1.18rem;
  font-weight: 800;
  color: var(--sky-deep);
  margin-bottom: 12px;
  line-height: 1.45;
}

.guide-card-desc {
  font-size: 0.92rem;
  color: var(--text-sub);
  line-height: 1.66;
  margin-bottom: 18px;
  flex-grow: 1;
}

.guide-meta-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.82rem;
  color: var(--text-muted);
  padding-top: 14px;
  border-top: 1px solid var(--border-light);
  margin-bottom: 14px;
}

.guide-card-link {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--sky-base);
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

.guide-card-link:hover {
  color: var(--sky-hover);
  text-decoration: underline;
}

/* 卡片微光聚焦点跟随与按钮按压涟漪 */
.benefit-card, .feature-card, .pricing-card, .scenario-card, .hero-status-panel {
  position: relative;
}

.benefit-card::after, .feature-card::after, .pricing-card::after, .scenario-card::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  border-radius: inherit;
  background: radial-gradient(320px circle at var(--mouse-x, -999px) var(--mouse-y, -999px), rgba(14, 165, 233, 0.09), transparent 60%);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.3s ease;
  z-index: 1;
}

.benefit-card:hover::after, .feature-card:hover::after, .pricing-card:hover::after, .scenario-card:hover::after {
  opacity: 1;
}

.ripple-wave {
  position: absolute;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.45);
  transform: scale(0);
  animation: rippleAnim 0.6s linear;
  pointer-events: none;
}

@keyframes rippleAnim {
  to {
    transform: scale(4);
    opacity: 0;
  }
}

/* 尊重减弱动画 prefers-reduced-motion */
@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;
  }
  #skyCanvas {
    display: none !important;
  }
}

/* 响应式断点控制 */
@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .benefits-grid {
    grid-template-columns: 1fr;
  }
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 480px;
    margin: 0 auto;
  }
}

@media (max-width: 768px) {
  .mobile-toggle {
    display: block;
  }
  .main-nav {
    display: none;
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    background-color: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--border-light);
    flex-direction: column;
    padding: 22px;
    gap: 16px;
    box-shadow: 0 8px 24px rgba(15, 23, 42, 0.08);
  }
  .main-nav.is-open {
    display: flex;
  }
  .hero-title {
    font-size: 2.1rem;
  }
  .features-grid, .support-ecosystem-grid, .scenarios-grid, .guides-grid {
    grid-template-columns: 1fr;
  }
  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }
  .legal-article-card, .article-content {
    padding: 26px 20px;
  }
}