:root {
  --bg: #05080f;
  --bg-elevated: rgba(12, 18, 30, 0.86);
  --bg-card: rgba(16, 24, 40, 0.88);
  --bg-card-hover: rgba(22, 33, 54, 0.94);
  --border: rgba(148, 163, 184, 0.16);
  --border-accent: rgba(56, 189, 248, 0.45);
  --text: #f1f5f9;
  --text-muted: #94a3b8;
  --text-soft: #cbd5e1;
  --primary: #0ea5e9;
  --primary-bright: #38bdf8;
  --accent: #f59e0b;
  --accent-soft: rgba(245, 158, 11, 0.14);
  --success: #10b981;
  --radius: 14px;
  --radius-sm: 10px;
  --max-width: 1140px;
  --shadow: 0 18px 40px rgba(2, 6, 23, 0.55);
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  overflow-x: hidden;
}

body {
  position: relative;
  margin: 0;
  overflow-x: hidden;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", sans-serif;
  background-color: var(--bg);
  /* 静态泰山夜幕、等高线与日出微光纹理 */
  background-image:
    radial-gradient(ellipse 68% 44% at 50% 6%, rgba(245, 158, 11, 0.15), transparent 64%),
    radial-gradient(ellipse 80% 50% at 15% 18%, rgba(14, 165, 233, 0.13), transparent 60%),
    radial-gradient(ellipse 60% 45% at 85% 78%, rgba(245, 158, 11, 0.08), transparent 65%),
    repeating-radial-gradient(circle at 50% 34%, rgba(56, 189, 248, 0.032) 0 1px, transparent 1px 42px),
    linear-gradient(180deg, #04070d 0%, #060a13 48%, #03050a 100%);
  background-attachment: fixed;
  color: var(--text);
  line-height: 1.65;
  font-size: 16px;
}

/* 全局静态石刻等高网 + 呼吸星辉层 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(148, 163, 184, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148, 163, 184, 0.035) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: radial-gradient(circle at 50% 35%, rgba(0, 0, 0, 0.9), transparent 82%);
  -webkit-mask-image: radial-gradient(circle at 50% 35%, rgba(0, 0, 0, 0.9), transparent 82%);
  animation: skyBreathing 9s ease-in-out infinite alternate;
}

/* 全局动态高空云雾流光层 */
body::after {
  content: "";
  position: fixed;
  inset: -20% -15%;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(ellipse 46% 24% at 30% 42%, rgba(56, 189, 248, 0.075), transparent 70%),
    radial-gradient(ellipse 48% 26% at 72% 58%, rgba(245, 158, 11, 0.065), transparent 72%);
  animation: mistVeilShift 22s ease-in-out infinite alternate;
}

main,
.site-footer {
  position: relative;
  z-index: 2;
}

a {
  color: inherit;
  text-decoration: none;
}

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

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(8, 12, 20, 0.86);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 70px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #080c14;
  font-weight: 900;
  font-size: 1.05rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
  color: var(--text-soft);
  font-size: 0.95rem;
}

.nav-links a:hover {
  color: var(--primary-bright);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 46px;
  padding: 11px 24px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.98rem;
  line-height: 1.2;
  transition: transform 0.16s ease, background-color 0.16s ease, box-shadow 0.16s ease;
  cursor: pointer;
  text-align: center;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-bright), var(--primary));
  color: #06121e;
  box-shadow: 0 8px 24px rgba(14, 165, 233, 0.32);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 12px 28px rgba(56, 189, 248, 0.4);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--border-accent);
}

.btn-sm {
  min-height: 40px;
  padding: 8px 18px;
  font-size: 0.9rem;
}

/* Hero */
.hero {
  position: relative;
  padding: 84px 0 68px;
  text-align: center;
  overflow: hidden;
}

.hero-badge {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: 999px;
  background: linear-gradient(90deg, rgba(245, 158, 11, 0.16), rgba(56, 189, 248, 0.14), rgba(245, 158, 11, 0.16));
  background-size: 200% 100%;
  border: 1px solid rgba(245, 158, 11, 0.4);
  color: #fcd34d;
  font-size: 0.86rem;
  font-weight: 600;
  margin-bottom: 22px;
  box-shadow: 0 0 24px rgba(245, 158, 11, 0.14);
  animation: badgeShimmer 6s linear infinite;
}

.hero h1 {
  margin: 0 auto 20px;
  max-width: 820px;
  font-size: clamp(2.1rem, 4.8vw, 3.55rem);
  line-height: 1.18;
  font-weight: 850;
  letter-spacing: -0.02em;
  text-shadow: 0 8px 32px rgba(2, 6, 23, 0.85);
}

.hero-gradient {
  background: linear-gradient(90deg, #f8fafc 0%, #38bdf8 38%, #fbbf24 72%, #f8fafc 100%);
  background-size: 220% auto;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  animation: gradientFlow 8s linear infinite;
}

.hero-subtitle {
  margin: 0 auto 34px;
  max-width: 680px;
  color: var(--text-soft);
  font-size: 1.12rem;
}

.hero-actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 46px;
}

.hero-metrics {
  position: relative;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  max-width: 920px;
  margin: 0 auto;
  padding: 20px;
  background: rgba(12, 18, 30, 0.82);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(56, 189, 248, 0.24);
  border-radius: var(--radius);
  box-shadow: 0 18px 44px rgba(2, 6, 23, 0.65);
  overflow: hidden;
}

.hero-metrics::before {
  content: "";
  position: absolute;
  top: 0;
  left: -30%;
  width: 60%;
  height: 2px;
  background: linear-gradient(90deg, transparent, #fbbf24, #38bdf8, transparent);
  animation: ridgeSweep 6s ease-in-out infinite;
}

.metric-item strong {
  display: block;
  font-size: 1.45rem;
  color: var(--primary-bright);
  font-weight: 800;
}

.metric-item span {
  font-size: 0.88rem;
  color: var(--text-muted);
}

/* Sections */
.section {
  padding: 68px 0;
}

.section-alt {
  background: rgba(10, 15, 26, 0.72);
  backdrop-filter: blur(6px);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.section-header {
  text-align: center;
  max-width: 660px;
  margin: 0 auto 42px;
}

.section-tag {
  display: inline-block;
  color: var(--primary-bright);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.section-header h2 {
  margin: 0 0 12px;
  font-size: clamp(1.65rem, 3.2vw, 2.35rem);
  line-height: 1.25;
}

.section-header p {
  margin: 0;
  color: var(--text-muted);
}

/* Cards & Grids */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px;
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.card:hover {
  border-color: var(--border-accent);
  transform: translateY(-2px);
}

.icon-box {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: rgba(56, 189, 248, 0.12);
  color: var(--primary-bright);
  margin-bottom: 16px;
}

.card h3 {
  margin: 0 0 10px;
  font-size: 1.15rem;
}

.card p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* Streaming & AI Support */
.pill-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
  padding: 0;
  list-style: none;
}

.pill-list li {
  padding: 6px 13px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border);
  font-size: 0.88rem;
  color: var(--text-soft);
}

.check-list {
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.check-list li {
  position: relative;
  padding-left: 24px;
  color: var(--text-soft);
  font-size: 0.95rem;
}

.check-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--success);
  font-weight: 800;
}

/* Pricing Comparison Table */
.table-wrap {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.pricing-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.pricing-table th,
.pricing-table td {
  padding: 16px 18px;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}

.pricing-table thead th {
  background: rgba(8, 12, 20, 0.7);
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
}

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

.pricing-table tbody tr:hover {
  background: rgba(56, 189, 248, 0.04);
}

.plan-name {
  font-weight: 800;
  font-size: 1.05rem;
  display: block;
}

.plan-badge {
  display: inline-block;
  margin-top: 4px;
  padding: 2px 9px;
  border-radius: 999px;
  font-size: 0.76rem;
  font-weight: 700;
  background: var(--accent-soft);
  color: #fcd34d;
}

.plan-price {
  font-weight: 800;
  color: var(--primary-bright);
  font-size: 1.05rem;
  white-space: nowrap;
}

.plan-price-sub {
  display: block;
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-top: 2px;
}

.highlight-row {
  background: rgba(14, 165, 233, 0.08);
}

.pricing-note {
  margin-top: 18px;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.92rem;
}

/* Reviews */
.review-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 16px;
}

.stars {
  color: #fbbf24;
  letter-spacing: 2px;
  font-size: 0.95rem;
}

.review-quote {
  margin: 0;
  color: var(--text-soft);
  font-size: 0.96rem;
}

.reviewer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 12px;
  border-top: 1px solid var(--border);
  font-size: 0.88rem;
}

.reviewer strong {
  color: var(--text);
}

.reviewer span {
  color: var(--text-muted);
}

/* FAQ */
.faq-list {
  max-width: 820px;
  margin: 0 auto;
  display: grid;
  gap: 12px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0 22px;
}

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

.faq-item summary {
  list-style: none;
  padding: 18px 28px 18px 0;
  font-weight: 700;
  cursor: pointer;
  position: relative;
}

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

.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.3rem;
  color: var(--primary-bright);
  font-weight: 400;
}

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

.faq-answer {
  padding: 0 0 18px;
  color: var(--text-muted);
  font-size: 0.95rem;
  border-top: 1px solid var(--border);
  padding-top: 14px;
}

/* Bottom CTA */
.cta-banner {
  background: linear-gradient(135deg, rgba(14, 165, 233, 0.16), rgba(245, 158, 11, 0.12));
  border: 1px solid var(--border-accent);
  border-radius: var(--radius);
  padding: 40px 28px;
  text-align: center;
}

.cta-banner h2 {
  margin: 0 0 10px;
  font-size: clamp(1.45rem, 2.8vw, 2rem);
}

.cta-banner p {
  margin: 0 auto 24px;
  max-width: 580px;
  color: var(--text-soft);
}

/* Footer: strictly 4 titles */
.site-footer {
  border-top: 1px solid var(--border);
  background: #060910;
  padding: 36px 0;
}

.footer-nav {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  text-align: center;
}

.footer-title-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 1rem;
  color: var(--text-soft);
  transition: color 0.16s ease, background-color 0.16s ease;
}

.footer-title-link:hover {
  color: var(--primary-bright);
  background: rgba(255, 255, 255, 0.04);
}

/* Subpages */
.subpage-main {
  padding: 56px 0 76px;
}

.doc-card {
  max-width: 860px;
  margin: 0 auto;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px;
  box-shadow: var(--shadow);
}

.doc-card h1 {
  margin: 0 0 10px;
  font-size: clamp(1.75rem, 3vw, 2.3rem);
}

.doc-meta {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 28px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--border);
}

.doc-section + .doc-section {
  margin-top: 28px;
}

.doc-section h2 {
  margin: 0 0 10px;
  font-size: 1.22rem;
  color: var(--primary-bright);
}

.doc-section p,
.doc-section li {
  color: var(--text-soft);
}

.doc-section ul {
  margin: 10px 0 0;
  padding-left: 20px;
  display: grid;
  gap: 8px;
}

.sitemap-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
  margin-top: 18px;
}

.sitemap-box {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 20px;
}

.sitemap-box h2 {
  margin: 0 0 12px;
  font-size: 1.08rem;
  color: var(--primary-bright);
}

.sitemap-box ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

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

/* High-Tech Grid Cards & SEO Articles */
.tech-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.tech-card {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 14px;
  padding: 24px;
  border-radius: var(--radius);
  background:
    linear-gradient(180deg, rgba(56, 189, 248, 0.06) 0%, rgba(19, 28, 46, 0.96) 38%),
    var(--bg-card);
  border: 1px solid rgba(56, 189, 248, 0.24);
  box-shadow: 0 10px 28px rgba(2, 6, 23, 0.45);
  overflow: hidden;
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.tech-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--primary-bright), var(--accent), transparent);
  opacity: 0.75;
}

.tech-card:hover {
  transform: translateY(-4px);
  border-color: var(--primary-bright);
  box-shadow: 0 16px 36px rgba(14, 165, 233, 0.22);
}

.tech-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.tech-badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  color: var(--primary-bright);
  background: rgba(14, 165, 233, 0.14);
  border: 1px solid rgba(56, 189, 248, 0.28);
}

.tech-index {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.tech-card-title {
  margin: 0;
  font-size: 1.08rem;
  line-height: 1.45;
  color: var(--text);
}

.tech-card-title a:hover {
  color: var(--primary-bright);
}

.tech-card-desc {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 1.65;
}

.tech-card-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-top: 14px;
  border-top: 1px solid var(--border);
  font-size: 0.84rem;
  color: var(--text-muted);
}

.tech-read-more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 700;
  color: var(--primary-bright);
}

.tech-read-more:hover {
  color: #7dd3fc;
}

.article-shell {
  max-width: 880px;
  margin: 0 auto;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 38px;
  box-shadow: var(--shadow);
}

.article-header {
  padding-bottom: 22px;
  margin-bottom: 26px;
  border-bottom: 1px solid var(--border);
}

.article-header h1 {
  margin: 12px 0 12px;
  font-size: clamp(1.65rem, 3.1vw, 2.25rem);
  line-height: 1.3;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 20px;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.article-body {
  color: var(--text-soft);
  font-size: 1.02rem;
  line-height: 1.85;
}

.article-body h2 {
  margin: 30px 0 12px;
  font-size: 1.32rem;
  color: var(--primary-bright);
  line-height: 1.4;
}

.article-body h3 {
  margin: 22px 0 10px;
  font-size: 1.12rem;
  color: var(--text);
}

.article-body p {
  margin: 0 0 16px;
}

.article-body ul {
  margin: 12px 0 18px;
  padding-left: 22px;
  display: grid;
  gap: 8px;
}

.article-body a {
  color: var(--primary-bright);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.article-body a:hover {
  color: #7dd3fc;
}

.article-footer-actions {
  margin-top: 34px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}

/* Responsive Media Queries */
@media (max-width: 960px) {
  .grid-3,
  .tech-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

@media (max-width: 768px) {
  .nav-inner {
    flex-wrap: wrap;
    padding: 12px 0;
    gap: 10px;
  }

  .nav-links {
    order: 3;
    width: 100%;
    flex-wrap: wrap;
    justify-content: flex-start;
    gap: 10px 16px;
    padding-top: 8px;
    border-top: 1px solid var(--border);
    font-size: 0.9rem;
  }

  .nav-links a {
    padding: 4px 0;
  }

  .hero {
    padding: 52px 0 44px;
  }

  .hero-actions {
    flex-direction: column;
  }

  .hero-actions .btn,
  .cta-banner .btn,
  .pricing-table .btn {
    width: 100%;
    min-height: 48px;
    font-size: 1rem;
  }

  .hero-metrics,
  .grid-3,
  .grid-2,
  .tech-grid,
  .footer-nav,
  .sitemap-grid {
    grid-template-columns: 1fr;
  }

  .article-shell {
    padding: 24px 18px;
  }

  .article-footer-actions .btn {
    width: 100%;
    min-height: 48px;
  }

  .section {
    padding: 48px 0;
  }

  /* Responsive single-column pricing comparison table */
  .table-wrap {
    background: transparent;
    border: none;
    box-shadow: none;
  }

  .pricing-table,
  .pricing-table thead,
  .pricing-table tbody,
  .pricing-table tr,
  .pricing-table td {
    display: block;
    width: 100%;
  }

  .pricing-table thead {
    display: none;
  }

  .pricing-table tbody {
    display: grid;
    gap: 16px;
  }

  .pricing-table tbody tr {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 14px 18px;
  }

  .pricing-table tbody tr.highlight-row {
    border-color: var(--border-accent);
    background: rgba(14, 165, 233, 0.1);
  }

  .pricing-table td {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    padding: 10px 0;
    border-bottom: 1px solid var(--border);
    text-align: right;
  }

  .pricing-table td:last-child {
    border-bottom: none;
    padding-top: 14px;
    display: block;
    text-align: center;
  }

  .pricing-table td::before {
    content: attr(data-label);
    font-weight: 600;
    color: var(--text-muted);
    text-align: left;
    flex-shrink: 0;
  }

  .pricing-table td:last-child::before {
    display: none;
  }

  .doc-card {
    padding: 24px 18px;
  }
}

/* =========================================================
   泰山元素静态 & 动态背景视觉系统 (纯 CSS + SVG，零 JS)
   ========================================================= */
.taishan-backdrop {
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  overflow: hidden;
}

/* 泰山日出金轮 & 晨光射线 */
.taishan-sun-wrap {
  position: absolute;
  left: 50%;
  top: 24%;
  width: 520px;
  height: 520px;
  transform: translate(-50%, -50%);
}

.taishan-sun-halo {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: radial-gradient(
    circle,
    rgba(251, 191, 36, 0.34) 0%,
    rgba(245, 158, 11, 0.16) 28%,
    rgba(56, 189, 248, 0.06) 56%,
    transparent 74%
  );
  animation: taishanSunrisePulse 7s ease-in-out infinite;
}

.taishan-sun-core {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 148px;
  height: 148px;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  background: radial-gradient(circle, rgba(254, 243, 199, 0.52) 0%, rgba(245, 158, 11, 0.28) 52%, transparent 78%);
  box-shadow: 0 0 65px rgba(245, 158, 11, 0.28);
}

.taishan-sun-rays {
  position: absolute;
  inset: -40px;
  border-radius: 50%;
  background: repeating-conic-gradient(
    from 0deg,
    rgba(251, 191, 36, 0.085) 0deg 8deg,
    transparent 8deg 24deg
  );
  mask-image: radial-gradient(circle, rgba(0, 0, 0, 0.9) 18%, transparent 70%);
  -webkit-mask-image: radial-gradient(circle, rgba(0, 0, 0, 0.9) 18%, transparent 70%);
  animation: sunbeamRotate 48s linear infinite;
}

/* 泰山主峰与十八盘多层山峦剪影 */
.taishan-mountains {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  width: 100%;
  height: 58vh;
  min-height: 360px;
}

.taishan-mountains svg {
  width: 100%;
  height: 100%;
}

.taishan-ridge-far {
  opacity: 0.72;
}

.taishan-ridge-mid {
  opacity: 0.88;
}

.taishan-ridge-near {
  opacity: 0.96;
}

.taishan-ridge-glow {
  stroke-dasharray: 180 1200;
  stroke-dashoffset: 0;
  animation: mountainRimSweep 10s linear infinite;
}

/* 泰山动态双层云海 */
.taishan-cloud-band {
  position: absolute;
  left: -18%;
  width: 136%;
  bottom: 14%;
  height: 180px;
  opacity: 0.42;
  background:
    radial-gradient(ellipse 26% 48% at 18% 65%, rgba(148, 163, 184, 0.2), transparent 72%),
    radial-gradient(ellipse 32% 52% at 46% 55%, rgba(56, 189, 248, 0.16), transparent 72%),
    radial-gradient(ellipse 28% 45% at 76% 62%, rgba(251, 191, 36, 0.12), transparent 74%);
  filter: blur(18px);
  animation: cloudDriftSlow 26s ease-in-out infinite alternate;
}

.taishan-cloud-band--front {
  bottom: 5%;
  height: 150px;
  opacity: 0.34;
  background:
    radial-gradient(ellipse 30% 50% at 28% 60%, rgba(56, 189, 248, 0.16), transparent 74%),
    radial-gradient(ellipse 34% 48% at 64% 58%, rgba(226, 232, 240, 0.14), transparent 74%),
    radial-gradient(ellipse 22% 40% at 88% 68%, rgba(245, 158, 11, 0.1), transparent 74%);
  animation: cloudDriftReverse 34s ease-in-out infinite alternate;
}

/* 泰山夜空闪烁星辰 */
.taishan-star {
  position: absolute;
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: #e0f2fe;
  box-shadow: 0 0 8px rgba(56, 189, 248, 0.85);
  animation: starTwinkle 4.5s ease-in-out infinite;
}

.taishan-star--gold {
  background: #fde68a;
  box-shadow: 0 0 10px rgba(251, 191, 36, 0.85);
}

.s1 { left: 10%; top: 14%; animation-delay: 0s; }
.s2 { left: 22%; top: 9%; animation-delay: 1.1s; width: 2px; height: 2px; }
.s3 { left: 34%; top: 18%; animation-delay: 2.3s; }
.s4 { left: 66%; top: 12%; animation-delay: 0.7s; }
.s5 { left: 78%; top: 19%; animation-delay: 1.8s; width: 2px; height: 2px; }
.s6 { left: 89%; top: 11%; animation-delay: 2.9s; }
.s7 { left: 15%; top: 32%; animation-delay: 1.5s; width: 2px; height: 2px; }
.s8 { left: 84%; top: 30%; animation-delay: 3.4s; }

/* 泰山山脊升腾金青流光粒子 */
.taishan-ember {
  position: absolute;
  bottom: 12%;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: radial-gradient(circle, #fde68a 0%, #f59e0b 60%, transparent 100%);
  box-shadow: 0 0 12px rgba(245, 158, 11, 0.8);
  opacity: 0;
  animation: emberRise 11s linear infinite;
}

.taishan-ember--cyan {
  width: 4px;
  height: 4px;
  background: radial-gradient(circle, #bae6fd 0%, #38bdf8 60%, transparent 100%);
  box-shadow: 0 0 12px rgba(56, 189, 248, 0.85);
}

.e1 { left: 14%; animation-duration: 12s; animation-delay: 0s; }
.e2 { left: 26%; animation-duration: 9.5s; animation-delay: 2.2s; }
.e3 { left: 38%; animation-duration: 13s; animation-delay: 4.1s; }
.e4 { left: 49%; animation-duration: 10.5s; animation-delay: 1.3s; }
.e5 { left: 58%; animation-duration: 11.5s; animation-delay: 5.5s; }
.e6 { left: 69%; animation-duration: 9.8s; animation-delay: 3.1s; }
.e7 { left: 79%; animation-duration: 12.5s; animation-delay: 6.4s; }
.e8 { left: 88%; animation-duration: 10.2s; animation-delay: 2.8s; }

/* 泰山石碑刻纹微光扫描线 */
.taishan-horizon-sweep {
  position: absolute;
  left: -35%;
  bottom: 24%;
  width: 45%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(56, 189, 248, 0.65), rgba(251, 191, 36, 0.7), transparent);
  animation: ridgeSweep 9s ease-in-out infinite;
}

@keyframes skyBreathing {
  0% { opacity: 0.48; }
  100% { opacity: 0.92; }
}

@keyframes mistVeilShift {
  0% { transform: translate3d(-3%, -2%, 0) scale(1); }
  100% { transform: translate3d(3%, 2%, 0) scale(1.06); }
}

@keyframes taishanSunrisePulse {
  0%, 100% { transform: scale(0.95); opacity: 0.82; }
  50% { transform: scale(1.08); opacity: 1; }
}

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

@keyframes cloudDriftSlow {
  0% { transform: translate3d(-4%, 0, 0); }
  100% { transform: translate3d(4%, -10px, 0); }
}

@keyframes cloudDriftReverse {
  0% { transform: translate3d(4%, 0, 0); }
  100% { transform: translate3d(-5%, 8px, 0); }
}

@keyframes starTwinkle {
  0%, 100% { opacity: 0.22; transform: scale(0.8); }
  50% { opacity: 0.95; transform: scale(1.35); }
}

@keyframes emberRise {
  0% {
    transform: translate3d(0, 0, 0) scale(0.7);
    opacity: 0;
  }
  15% {
    opacity: 0.85;
  }
  80% {
    opacity: 0.55;
  }
  100% {
    transform: translate3d(24px, -420px, 0) scale(0.2);
    opacity: 0;
  }
}

@keyframes mountainRimSweep {
  0% { stroke-dashoffset: 1380; }
  100% { stroke-dashoffset: 0; }
}

@keyframes ridgeSweep {
  0% { transform: translateX(0); opacity: 0; }
  20% { opacity: 0.85; }
  80% { opacity: 0.7; }
  100% { transform: translateX(260%); opacity: 0; }
}

@keyframes badgeShimmer {
  0% { background-position: 0% 50%; }
  100% { background-position: 200% 50%; }
}

@keyframes gradientFlow {
  0% { background-position: 0% 50%; }
  100% { background-position: 220% 50%; }
}

@media (max-width: 768px) {
  .taishan-sun-wrap {
    width: 340px;
    height: 340px;
    top: 20%;
  }

  .taishan-mountains {
    height: 44vh;
    min-height: 260px;
  }
}

@media (prefers-reduced-motion: reduce) {
  body::before,
  body::after,
  .hero-badge,
  .hero-gradient,
  .hero-metrics::before,
  .taishan-sun-halo,
  .taishan-sun-rays,
  .taishan-cloud-band,
  .taishan-star,
  .taishan-ember,
  .taishan-ridge-glow,
  .taishan-horizon-sweep {
    animation: none !important;
  }
}