/* DeepSeek 智慧生态三维沙盘风 - 等距全息微缩城市与算力管网说明页 */
:root {
  --font-main: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --bg-main: #f0fdf4;
  --bg-card: #ffffff;
  --bg-card-subtle: #dcfce7;
  --color-primary: #064e3b;
  --color-primary-dark: #022c22;
  --color-sandbox-base: #0f172a;
  --color-holo-green: #10b981;
  --color-holo-green-hover: #059669;
  --color-cyber-teal: #06b6d4;
  --color-text-main: #064e3b;
  --color-text-body: #1e293b;
  --color-text-muted: #475569;
  --color-text-light: #94a3b8;
  --border-light: #cbd5e1;
  --border-holo: rgba(16, 185, 129, 0.4);
  --shadow-sm: 0 1px 3px rgba(6, 78, 59, 0.06);
  --shadow-md: 0 4px 16px rgba(6, 78, 59, 0.08);
  --shadow-lg: 0 12px 32px rgba(6, 78, 59, 0.12);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --max-w: 1100px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--bg-main);
  color: var(--color-text-body);
  font-family: var(--font-main);
}

body {
  line-height: 1.65;
  overflow-x: hidden;
  background-color: var(--bg-main);
}

.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}

/* Header - Sticky & Holographic Eco Grid */
.header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(12px);
  border-bottom: 2px solid var(--color-primary);
  box-shadow: var(--shadow-sm);
}

.sandbox-stripe {
  height: 3px;
  background: linear-gradient(90deg, #10b981 0%, #06b6d4 50%, #064e3b 100%);
}

.nav-container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

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

.brand-logo {
  height: 38px;
  width: auto;
  object-fit: contain;
}

.brand-meta {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--color-primary);
  line-height: 1.1;
}

.brand-tag {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--color-holo-green);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 24px;
  list-style: none;
}

.nav-item a {
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--color-text-body);
  padding: 6px 4px;
  position: relative;
  transition: color 0.2s ease;
}

.nav-item a:hover,
.nav-item.active a {
  color: var(--color-holo-green);
}

.nav-cta-btn {
  background-color: var(--color-primary);
  color: #ffffff !important;
  padding: 8px 18px !important;
  border-radius: var(--radius-sm);
  font-size: 0.88rem !important;
  font-weight: 700 !important;
  transition: all 0.2s ease !important;
  border: 1px solid var(--color-primary);
}

.nav-cta-btn:hover {
  background-color: var(--color-holo-green) !important;
  border-color: var(--color-holo-green) !important;
  transform: translateY(-1px);
}

/* Section Common */
.section {
  padding: 64px 0;
  border-bottom: 1px solid var(--border-light);
}

.section-header {
  margin-bottom: 40px;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.78rem;
  font-weight: 800;
  color: var(--color-holo-green);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.section-tag::before {
  content: "🌐";
  font-size: 0.9rem;
}

.section-title {
  font-size: 1.85rem;
  font-weight: 800;
  color: var(--color-primary);
  letter-spacing: -0.02em;
  line-height: 1.3;
}

.section-subtitle {
  font-size: 1rem;
  color: var(--color-text-muted);
  margin-top: 8px;
}

/* Hero Section */
.hero-section {
  padding: 60px 0 50px;
  background: linear-gradient(180deg, #ffffff 0%, var(--bg-main) 100%);
  border-bottom: 1px solid var(--border-light);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 40px;
  align-items: center;
}

.hero-badge-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 18px;
  flex-wrap: wrap;
}

.badge-capsule {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 4px;
  background-color: var(--color-primary);
  color: #ffffff;
  letter-spacing: 0.04em;
}

.badge-holo {
  background-color: var(--color-holo-green);
}

.hero-update-date {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  font-weight: 500;
}

.hero-h1 {
  margin-bottom: 18px;
}

.h1-super {
  display: block;
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--color-holo-green);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 6px;
}

.h1-sub {
  display: block;
  font-size: 2.15rem;
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1.25;
  letter-spacing: -0.02em;
}

.hero-desc {
  font-size: 1.05rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: 28px;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 28px;
  background-color: var(--color-primary);
  color: #ffffff;
  font-size: 1rem;
  font-weight: 700;
  border-radius: var(--radius-sm);
  text-decoration: none;
  border: 2px solid var(--color-primary);
  transition: all 0.2s ease;
}

.btn-primary:hover {
  background-color: var(--color-holo-green);
  border-color: var(--color-holo-green);
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(16, 185, 129, 0.3);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 24px;
  background-color: #ffffff;
  color: var(--color-primary);
  font-size: 1rem;
  font-weight: 700;
  border-radius: var(--radius-sm);
  text-decoration: none;
  border: 2px solid var(--border-light);
  transition: all 0.2s ease;
}

.btn-secondary:hover {
  border-color: var(--color-primary);
  background-color: var(--bg-card-subtle);
  transform: translateY(-2px);
}

.hero-meta-strip {
  display: flex;
  gap: 20px;
  font-size: 0.84rem;
  color: var(--color-text-muted);
  border-top: 1px dashed var(--border-light);
  padding-top: 16px;
}

.hero-meta-item strong {
  color: var(--color-primary);
}

/* Sandbox Visual Card */
.sandbox-visual-card {
  background-color: var(--color-sandbox-base);
  border: 2px solid #334155;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  position: relative;
  color: #ffffff;
}

.sandbox-hud-topbar {
  background-color: #022c22;
  padding: 10px 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--color-cyber-teal);
  border-bottom: 1px solid #1e293b;
}

.sandbox-indicators {
  display: flex;
  gap: 8px;
}

.sandbox-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: #475569;
}

.sandbox-dot.active {
  background-color: var(--color-holo-green);
  box-shadow: 0 0 6px var(--color-holo-green);
}

.sandbox-dot.teal {
  background-color: var(--color-cyber-teal);
  box-shadow: 0 0 6px var(--color-cyber-teal);
}

.sandbox-visual-body {
  padding: 20px;
}

.sandbox-telemetry-box {
  background-color: rgba(6, 78, 59, 0.5);
  border: 1px solid rgba(16, 185, 129, 0.4);
  border-left: 4px solid var(--color-holo-green);
  padding: 12px 14px;
  border-radius: 4px;
  font-size: 0.86rem;
  margin-bottom: 14px;
}

.sandbox-telemetry-box strong {
  color: var(--color-cyber-teal);
  display: block;
  font-size: 0.75rem;
  text-transform: uppercase;
  margin-bottom: 4px;
}

.sandbox-dialog-response {
  background-color: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 14px;
  border-radius: 4px;
  font-size: 0.85rem;
  line-height: 1.6;
}

.sandbox-mesh-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(16, 185, 129, 0.15);
  border: 1px solid var(--color-holo-green);
  padding: 3px 8px;
  border-radius: 4px;
  font-size: 0.74rem;
  font-weight: 700;
  color: var(--color-holo-green);
  margin-bottom: 8px;
}

.sandbox-image-wrap {
  margin-top: 14px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 1px solid #334155;
}

.sandbox-image-wrap img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}

/* Feature Section */
.feature-row-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 32px;
}

.feature-bar {
  display: grid;
  grid-template-columns: 260px 1fr;
  background-color: #ffffff;
  border: 1px solid var(--border-light);
  border-left: 5px solid var(--color-primary);
  border-radius: var(--radius-sm);
  padding: 20px 24px;
  transition: all 0.2s ease;
  box-shadow: var(--shadow-sm);
}

.feature-bar:hover {
  border-left-color: var(--color-holo-green);
  transform: translateX(4px);
  box-shadow: var(--shadow-md);
}

.feature-bar-title {
  display: flex;
  align-items: center;
  gap: 12px;
}

.feature-number {
  font-size: 1.4rem;
  font-weight: 900;
  color: var(--color-holo-green);
  font-family: monospace;
}

.feature-bar-h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-primary);
}

.feature-bar-desc {
  font-size: 0.94rem;
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
}

.feature-extra-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.feature-extra-card {
  background-color: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-sm);
}

.feature-card-img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
  border: 1px solid var(--border-light);
}

.feature-extra-card h4 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.feature-extra-card p {
  font-size: 0.92rem;
  color: var(--color-text-muted);
}

/* Steps Section */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.step-card {
  background-color: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 24px 20px;
  position: relative;
  transition: all 0.2s ease;
  box-shadow: var(--shadow-sm);
}

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

.step-seq {
  width: 36px;
  height: 36px;
  background-color: var(--color-primary);
  color: #ffffff;
  font-size: 1rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 4px;
  margin-bottom: 16px;
}

.step-card:nth-child(1) .step-seq { background-color: var(--color-holo-green); }

.step-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 10px;
}

.step-desc {
  font-size: 0.88rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* Dark Comparison Checklist */
.dark-checklist-card {
  background-color: #022c22;
  color: #ffffff;
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-lg);
  border: 2px solid var(--color-primary);
}

.checklist-header {
  margin-bottom: 30px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.15);
  padding-bottom: 20px;
}

.checklist-header h3 {
  font-size: 1.6rem;
  font-weight: 800;
  color: #ffffff;
}

.checklist-header p {
  color: #cbd5e1;
  font-size: 0.95rem;
  margin-top: 6px;
}

.checklist-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

.checklist-column h4 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.col-wrong h4 { color: #f87171; }
.col-right h4 { color: #4ade80; }

.checklist-items {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.checklist-items li {
  font-size: 0.92rem;
  line-height: 1.55;
  padding: 10px 14px;
  background-color: rgba(255, 255, 255, 0.05);
  border-radius: 6px;
  border-left: 3px solid transparent;
}

.col-wrong li { border-left-color: #ef4444; color: #e2e8f0; }
.col-right li { border-left-color: #22c55e; color: #f1f5f9; }

/* Scenarios */
.scenario-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.scenario-card {
  background-color: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 24px 20px;
  box-shadow: var(--shadow-sm);
  transition: all 0.2s ease;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.scenario-card:hover {
  border-color: var(--color-holo-green);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.role-badge {
  display: inline-block;
  background-color: var(--bg-card-subtle);
  color: var(--color-primary);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 8px;
  border-radius: 4px;
  margin-bottom: 12px;
}

.role-name {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.role-quote {
  font-size: 0.88rem;
  color: var(--color-text-muted);
  line-height: 1.55;
  margin-bottom: 16px;
  font-style: italic;
}

.role-action-tag {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--color-holo-green);
  border-top: 1px solid var(--border-light);
  padding-top: 10px;
}

/* Tips */
.tips-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.tip-card {
  background-color: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-sm);
}

.tip-card:hover {
  box-shadow: var(--shadow-md);
}

.tip-tag {
  font-size: 0.75rem;
  font-weight: 800;
  color: var(--color-holo-green);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 8px;
}

.tip-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 10px;
}

.tip-desc {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* Troubleshooting */
.trouble-list {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.trouble-card {
  background-color: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 22px 26px;
  box-shadow: var(--shadow-sm);
}

.trouble-symptom {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.05rem;
  font-weight: 700;
  color: #dc2626;
  margin-bottom: 12px;
}

.trouble-symptom::before {
  content: "⚠";
  font-size: 1.1rem;
}

.trouble-solution-flow {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.9rem;
  color: var(--color-text-muted);
  flex-wrap: wrap;
}

.flow-step {
  background-color: var(--bg-main);
  border: 1px solid var(--border-light);
  padding: 6px 12px;
  border-radius: 4px;
  font-weight: 600;
  color: var(--color-primary);
}

.flow-arrow {
  color: var(--color-text-light);
  font-weight: 900;
}

/* FAQ Accordion */
.faq-container {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.faq-item {
  background-color: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: all 0.2s ease;
}

.faq-item summary {
  padding: 18px 22px;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-primary);
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
}

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

.faq-item summary::after {
  content: "+";
  font-size: 1.3rem;
  font-weight: 400;
  color: var(--color-holo-green);
  transition: transform 0.2s ease;
}

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

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

.faq-answer {
  padding: 0 22px 18px;
  font-size: 0.93rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  border-top: 1px solid var(--bg-main);
  padding-top: 14px;
}

/* News Section */
.news-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.news-card {
  background-color: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  padding: 16px 20px;
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all 0.2s ease;
}

.news-card:hover {
  border-color: var(--color-holo-green);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.news-title {
  font-size: 0.96rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 8px;
  line-height: 1.45;
}

.news-meta {
  font-size: 0.78rem;
  color: var(--color-text-light);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.news-bottom-update {
  margin-top: 24px;
  text-align: right;
  font-size: 0.82rem;
  color: var(--color-text-muted);
}

/* CTA */
.cta-section {
  padding: 70px 0;
  background-color: var(--color-primary-dark);
  color: #ffffff;
  text-align: center;
  position: relative;
  overflow: hidden;
  border-top: 2px solid var(--color-holo-green);
}

.cta-box {
  max-width: 760px;
  margin: 0 auto;
}

.cta-h2 {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.cta-p {
  font-size: 1.05rem;
  color: #cbd5e1;
  margin-bottom: 28px;
  line-height: 1.6;
}

.cta-btn {
  display: inline-flex;
  align-items: center;
  padding: 16px 36px;
  background-color: var(--color-holo-green);
  color: #ffffff;
  font-size: 1.05rem;
  font-weight: 800;
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: all 0.2s ease;
  box-shadow: 0 4px 14px rgba(16, 185, 129, 0.4);
}

.cta-btn:hover {
  background-color: var(--color-holo-green-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(16, 185, 129, 0.5);
}

/* Footer */
.footer {
  background-color: #022c22;
  color: #94a3b8;
  padding: 60px 0 30px;
  font-size: 0.88rem;
  border-top: 4px solid var(--color-holo-green);
}

.footer-top {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 36px;
  margin-bottom: 40px;
}

.footer-brand h4 {
  font-size: 1.25rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 12px;
}

.footer-brand p {
  line-height: 1.65;
  color: #94a3b8;
  font-size: 0.86rem;
}

.footer-col h5 {
  font-size: 0.95rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 16px;
  letter-spacing: 0.04em;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a {
  color: #94a3b8;
  text-decoration: none;
  transition: color 0.2s ease;
}

.footer-links a:hover {
  color: #ffffff;
  text-decoration: underline;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.82rem;
}

.footer-bottom time {
  color: #cbd5e1;
}

/* Responsive Styles */
@media (max-width: 900px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }
  
  .feature-bar {
    grid-template-columns: 1fr;
    gap: 10px;
  }
  
  .feature-extra-grid,
  .checklist-grid,
  .steps-grid,
  .scenario-grid,
  .tips-grid,
  .news-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-top {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 640px) {
  .h1-sub {
    font-size: 1.65rem;
  }
  
  .section-title {
    font-size: 1.45rem;
  }
  
  .cta-h2 {
    font-size: 1.5rem;
  }
  
  .footer-top {
    grid-template-columns: 1fr;
  }
  
  .nav-menu {
    gap: 12px;
  }
  
  .nav-item:not(.active):not(:last-child) {
    display: none;
  }
}


/* PERF-PATCH-20260928 */
img { max-width: 100%; }
@media (max-width: 900px) {
  header, .header, .site-header {
    backdrop-filter: none !important;
    -webkit-backdrop-filter: none !important;
  }
}
@media (max-width: 900px), (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-iteration-count: 1 !important;
    animation-duration: 0.6s !important;
  }
}
main section:not(#hero):not(.hero) {
  content-visibility: auto;
  contain-intrinsic-size: auto 420px;
}